Midamerican Funding 10-K 1 Mar 21 2020 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2020	Jan. 31, 2021	Jun. 30, 2020
Document Information [Line Items]
Document Type	10-K
Document Annual Report	true
Document Transition Report	false
Entity File Number	001-14881
Entity Registrant Name	BERKSHIRE HATHAWAY ENERGY COMPANY
Entity Tax Identification Number	94-2213782
Entity Incorporation, State or Country Code	IA
Entity Address, Address Line One	666 Grand Avenue
Entity Address, Address Line Two	Suite 500
Entity Address, City or Town	Des Moines
Entity Address, State or Province	IA
Entity Address, Postal Zip Code	50309-2580
City Area Code	515
Local Phone Number	242-4300
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		76,368,874
Document Period End Date	Dec. 31, 2020
Amendment Flag	false
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	FY
Entity Central Index Key	0001081316
Current Fiscal Year End Date	--12-31
Entity Public Float			$ 0
PacifiCorp [Member]
Document Information [Line Items]
Entity File Number	001-05152
Entity Registrant Name	PACIFICORP
Entity Tax Identification Number	93-0246090
Entity Incorporation, State or Country Code	OR
Entity Address, Address Line One	825 N.E. Multnomah Street
Entity Address, City or Town	Portland
Entity Address, State or Province	OR
Entity Address, Postal Zip Code	97232
City Area Code	888
Local Phone Number	221-7070
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		357,060,915
Entity Central Index Key	0000075594
Current Fiscal Year End Date	--12-31
Entity Public Float			0
MidAmerican Funding, LLC and Subsidiaries [Member]
Document Information [Line Items]
Entity File Number	333-90553
Entity Registrant Name	MIDAMERICAN FUNDING, LLC
Entity Tax Identification Number	47-0819200
Entity Incorporation, State or Country Code	IA
Entity Address, Address Line One	666 Grand Avenue
Entity Address, Address Line Two	Suite 500
Entity Address, City or Town	Des Moines
Entity Address, State or Province	IA
Entity Address, Postal Zip Code	50309-2580
City Area Code	515
Local Phone Number	242-4300
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	Yes
Entity Current Reporting Status	No
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Central Index Key	0001098296
Current Fiscal Year End Date	--12-31
Entity Public Float			0
MidAmerican Energy Company and Subsidiaries [Member]
Document Information [Line Items]
Entity File Number	333-15387
Entity Registrant Name	MIDAMERICAN ENERGY COMPANY
Entity Tax Identification Number	42-1425214
Entity Incorporation, State or Country Code	IA
Entity Address, Address Line One	666 Grand Avenue
Entity Address, Address Line Two	Suite 500
Entity Address, City or Town	Des Moines
Entity Address, State or Province	IA
Entity Address, Postal Zip Code	50309-2580
City Area Code	515
Local Phone Number	242-4300
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		70,980,203
Entity Central Index Key	0000928576
Current Fiscal Year End Date	--12-31
Entity Public Float			0
Nevada Power Company [Member]
Document Information [Line Items]
Entity File Number	000-52378
Entity Registrant Name	NEVADA POWER COMPANY
Entity Tax Identification Number	88-0420104
Entity Incorporation, State or Country Code	NV
Entity Address, Address Line One	6226 West Sahara Avenue
Entity Address, City or Town	Las Vegas
Entity Address, State or Province	NV
Entity Address, Postal Zip Code	89146
City Area Code	702
Local Phone Number	402-5000
Title of 12(g) Security	Common Stock, $1.00 stated value
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		1,000
Entity Central Index Key	0000071180
Current Fiscal Year End Date	--12-31
Entity Public Float			0
Sierra Pacific Power Company [Member]
Document Information [Line Items]
Entity File Number	000-00508
Entity Registrant Name	SIERRA PACIFIC POWER COMPANY
Entity Tax Identification Number	88-0044418
Entity Incorporation, State or Country Code	NV
Entity Address, Address Line One	6100 Neil Road
Entity Address, City or Town	Reno
Entity Address, State or Province	NV
Entity Address, Postal Zip Code	89511
City Area Code	775
Local Phone Number	834-4011
Title of 12(g) Security	Common Stock, $3.75 par value
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		1,000
Entity Central Index Key	0000090144
Current Fiscal Year End Date	--12-31
Entity Public Float			0
Eastern Energy Gas Holdings, LLC [Member]
Document Information [Line Items]
Entity File Number	001-37591
Entity Registrant Name	EASTERN ENERGY GAS HOLDINGS, LLC
Entity Tax Identification Number	46-3639580
Entity Incorporation, State or Country Code	VA
Entity Address, Address Line One	6603 West Broad Street
Entity Address, City or Town	Richmond
Entity Address, State or Province	VA
Entity Address, Postal Zip Code	23230
City Area Code	804
Local Phone Number	613-5100
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Central Index Key	0001603291
Current Fiscal Year End Date	--12-31
Entity Public Float			$ 0

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Millions		Dec. 31, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents		$ 1,290	$ 1,040
Restricted cash and cash equivalents		140	212
Trade receivables, net		2,107	1,910
Inventories		1,168	873
Loans Receivable Held-for-sale, Net, Not Part of Disposal Group		2,001	1,039
Regulatory Assets, Current		283	115
Other current assets		2,741	839
Total current assets		9,447	5,913
Property, plant and equipment, net		86,128	73,305
Goodwill		11,506	9,722
Finance lease right of use assets, net		501	504
Regulatory Assets, Noncurrent		3,157	2,766
Investments, including equity method and restricted cash and investments, noncurrent		14,320	6,255
Other assets		2,758	2,090
Total assets		127,316	100,051
Current liabilities:
Accounts payable		1,867	1,839
Accrued interest		555	493
Accrued property, income and other taxes		582	537
Accrued employee expenses		383	285
Short-term debt	[1]	2,286	3,214
Current portion of long-term debt		1,839	2,539
Regulatory Liability, Current		254	211
Asset Retirement Obligation, Current		184	167
Other current liabilities		1,626	1,350
Total current liabilities		9,138	10,257
Regulatory Liability, Noncurrent		7,221	7,100
Deferred income taxes		11,775	9,653
Asset Retirement Obligations, Noncurrent		1,157	1,105
Other long-term liabilities		4,178	3,649
Total liabilities		80,339	67,473
Commitments and contingencies
Shareholders' equity:
Preferred Stock, Shares Authorized		100,000,000
Preferred Stock, Par or Stated Value Per Share		$ 0.01
Preferred Stock, Shares Issued		4,000,000
Preferred Stock, Shares Outstanding		4,000,000
Preferred Stock, Value, Issued		$ 3,750	$ 0
Common Stock, Shares Authorized		115,000,000	115,000,000
Common Stock, Shares, Issued		76,000,000	77,000,000
Common Stock, Shares, Outstanding		76,000,000	77,000,000
Common Stock, stated value per share		$ 0	$ 0
Common stock		$ 0	$ 0
Additional paid-in capital		6,377	6,389
Retained earnings		35,093	28,296
Accumulated other comprehensive loss, net		(1,552)	(1,706)
Total shareholder's equity		43,010	32,449
Total liabilities and shareholder's equity		127,316	100,051
PacifiCorp [Member]
Current assets:
Cash and cash equivalents		13	30
Restricted cash and cash equivalents		4	4
Receivables, Net, Current		703	644
Other receivables		48	70
Inventories		482	394
Regulatory Assets, Current		116	63
Prepayments		79	61
Other current assets		82	28
Total current assets		1,523	1,290
Property, plant and equipment, net		22,430	20,973
Finance lease right of use assets, net		17	19
Regulatory Assets, Noncurrent		1,279	1,060
Other assets		470	374
Total assets		25,702	23,697
Current liabilities:
Accounts payable		772	679
Accrued interest		127	116
Accrued property, income and other taxes		80	96
Accrued employee expenses		84	75
Short-term debt		93	130
Current portion of long-term debt		420	38
Regulatory Liability, Current		115	56
Asset Retirement Obligation, Current		13	19
Other current liabilities		174	170
Total current liabilities		1,865	1,360
Long-term Debt, Excluding Current Maturities		8,192	7,620
Regulatory Liability, Noncurrent		2,727	2,913
Deferred income taxes		2,627	2,563
Asset Retirement Obligations, Noncurrent		257	238
Other long-term liabilities		1,118	804
Total liabilities		16,529	15,260
Commitments and contingencies
Shareholders' equity:
Preferred Stock, Value, Issued		$ 2	$ 2
Common Stock, Shares Authorized		750,000,000	750,000,000
Common Stock, Shares, Issued		357,000,000	357,000,000
Common Stock, Shares, Outstanding		357,000,000	357,000,000
Common Stock, stated value per share		$ 0	$ 0
Common stock		$ 0	$ 0
Additional paid-in capital		4,479	4,479
Retained earnings		4,711	3,972
Accumulated other comprehensive loss, net		(19)	(16)
Total shareholder's equity		9,173	8,437
Total liabilities and shareholder's equity		25,702	23,697
PacifiCorp [Member] | Common Stock [Member]
Shareholders' equity:
Total shareholder's equity		0	0
MidAmerican Energy Company [Member]
Current assets:
Cash and cash equivalents		38	287
Restricted cash and cash equivalents		7	43
Trade receivables, net		234	291
Inventories		278	226
Other current assets		73	90
Total current assets		623	894
Property, plant and equipment, net		19,279	18,375
Regulatory Assets, Noncurrent		392	289
Investments, including equity method and restricted cash and investments, noncurrent		911	818
Other assets		232	188
Total assets		21,437	20,564
Current liabilities:
Accounts payable		408	519
Accrued interest		78	78
Accrued property, income and other taxes		161	225
Asset Retirement Obligation, Current		109	135
Other current liabilities		183	219
Total current liabilities		830	1,041
Long-term Debt, Excluding Current Maturities		7,210	7,208
Regulatory Liability, Noncurrent		1,111	1,406
Deferred income taxes		3,054	2,626
Asset Retirement Obligations, Noncurrent		709	704
Other long-term liabilities		458	339
Total liabilities		13,372	13,324
Commitments and contingencies
Shareholders' equity:
Common stock		0	0
Additional paid-in capital		561	561
Retained earnings		7,504	6,679
Total shareholder's equity		8,065	7,240
Total liabilities and shareholder's equity		$ 21,437	$ 20,564
MidAmerican Energy Company [Member] | Common Stock [Member]
Shareholders' equity:
Common Stock, Shares Authorized		350,000,000	350,000,000
Common Stock, Shares, Issued		71,000,000	71,000,000
Common Stock, Shares, Outstanding		71,000,000	71,000,000
Common Stock, stated value per share		$ 0	$ 0
Total shareholder's equity		$ 0	$ 0
MidAmerican Funding, LLC and Subsidiaries [Member]
Current assets:
Cash and cash equivalents		39	288
Restricted cash and cash equivalents		7	43
Trade receivables, net		234	291
Inventories		278	226
Other current assets		74	91
Total current assets		625	896
Property, plant and equipment, net		19,279	18,377
Goodwill		1,270	1,270
Regulatory Assets, Noncurrent		392	289
Investments, including equity method and restricted cash and investments, noncurrent		913	820
Other assets		232	188
Total assets		22,711	21,840
Current liabilities:
Accounts payable		408	520
Accrued interest		83	84
Accrued property, income and other taxes		161	226
Other current liabilities		183	219
Total current liabilities		1,012	1,220
Long-term Debt, Excluding Current Maturities		7,450	7,448
Regulatory Liability, Noncurrent		1,111	1,406
Deferred income taxes		3,052	2,621
Asset Retirement Obligations, Noncurrent		709	704
Other long-term liabilities		458	340
Total liabilities		13,792	13,739
Commitments and contingencies
Shareholders' equity:
Additional paid-in capital		1,679	1,679
Retained earnings		7,240	6,422
Total shareholder's equity		8,919	8,101
Total liabilities and shareholder's equity		22,711	21,840
Nevada Power Company [Member]
Current assets:
Cash and cash equivalents		25	15
Restricted cash and cash equivalents		11	10
Trade receivables, net		234	215
Inventories		69	62
Derivative Asset, Current		26	0
Regulatory Assets, Current		48	1
Prepayments		38	42
Other current assets		26	29
Total current assets		466	364
Property, plant and equipment, net		6,701	6,538
Property, plant and equipment, net		6,701	6,538
Finance lease right of use assets, net		351	441
Regulatory Assets, Noncurrent		746	800
Other assets		72	59
Total assets		8,336	8,202
Current liabilities:
Accounts payable		181	194
Accrued interest		32	30
Accrued property, income and other taxes		25	25
Current portion of long-term debt		0	575
Current portion of finance lease obligations		27	24
Regulatory Liability, Current		50	93
Contract with Customer, Refund Liability		47	62
Asset Retirement Obligation, Current		25	14
Other current liabilities		22	20
Total current liabilities		409	1,037
Long-term Debt, Excluding Current Maturities		2,496	1,776
Finance lease obligations		334	430
Regulatory Liability, Noncurrent		1,163	1,163
Deferred income taxes		738	714
Asset Retirement Obligations, Noncurrent		47	60
Other long-term liabilities		257	285
Total liabilities		5,397	5,405
Commitments and contingencies
Shareholders' equity:
Common Stock, Shares Authorized		1,000	1,000
Common Stock, Shares, Issued		1,000	1,000
Common Stock, Shares, Outstanding		1,000	1,000
Common Stock, stated value per share		$ 1	$ 1
Common stock		$ 0	$ 0
Additional paid-in capital		2,308	2,308
Retained earnings		634	493
Accumulated other comprehensive loss, net		(3)	(4)
Total shareholder's equity		2,939	2,797
Total liabilities and shareholder's equity		$ 8,336	$ 8,202
Nevada Power Company [Member] | Common Stock [Member]
Shareholders' equity:
Common Stock, Shares, Outstanding		1,000	1,000
Total shareholder's equity		$ 0	$ 0
Sierra Pacific Power Company [Member]
Current assets:
Cash and cash equivalents		19	27
Restricted cash and cash equivalents		7	5
Trade receivables, net		97	109
Income taxes receivable		7	14
Inventories		77	57
Regulatory Assets, Current		67	12
Other current assets		38	20
Total current assets		305	239
Property, plant and equipment, net		3,164	3,075
Property, plant and equipment, net		3,164	3,075
Finance lease right of use assets, net		126	43
Regulatory Assets, Noncurrent		267	283
Other assets		183	74
Total assets		3,919	3,671
Current liabilities:
Accounts payable		108	103
Accrued interest		14	14
Accrued property, income and other taxes		14	12
Short-term debt		45	0
Regulatory Liability, Current		34	49
Contract with Customer, Refund Liability		15	21
Other current liabilities		25	21
Total current liabilities		255	220
Long-term Debt, Excluding Current Maturities		1,164	1,135
Finance lease obligations		121	40
Regulatory Liability, Noncurrent		463	489
Deferred income taxes		374	347
Other long-term liabilities		131	120
Total liabilities		2,508	2,351
Commitments and contingencies
Shareholders' equity:
Common Stock, Shares Authorized		20,000,000	20,000,000
Common Stock, Shares, Issued		1,000	1,000
Common Stock, Shares, Outstanding		1,000	1,000
Common Stock, stated value per share		$ 3.75	$ 3.75
Common stock		$ 0	$ 0
Additional paid-in capital		1,111	1,111
Retained earnings		301	210
Accumulated other comprehensive loss, net		(1)	(1)
Total shareholder's equity		1,411	1,320
Total liabilities and shareholder's equity		$ 3,919	$ 3,671
Sierra Pacific Power Company [Member] | Common Stock [Member]
Shareholders' equity:
Common Stock, Shares, Outstanding		1,000	1,000
Total shareholder's equity		$ 0	$ 0
Eastern Energy Gas Holdings, LLC [Member]
Current assets:
Cash and cash equivalents		35	27
Restricted cash and cash equivalents		13	12
Trade receivables, net		177	173
Receivables from affiliates		139	362
Other receivables		51	26
Inventories		119	122
Regulatory Assets, Current		8	8
Prepayments		60	73
Other current assets		62	63
Total current assets		656	858
Property, plant and equipment, net		10,144	11,727
Property, plant and equipment, net		10,144	11,727
Goodwill		1,286	1,471
Finance lease right of use assets, net		8	6
Regulatory Assets, Noncurrent		74	40
Investments, including equity method and restricted cash and investments, noncurrent		244	312
Affiliated notes receivable		0	3,437
Other assets		291	979
Total assets		12,621	18,784
Current liabilities:
Accounts payable		71	59
Accounts payable to affiliates		39	82
Accrued interest		19	26
Accrued property, income and other taxes		29	81
Accrued employee expenses		23	21
Notes Payable Due To Affiliate, Current		9	260
Short-term debt		0	62
Current portion of long-term debt		500	699
Regulatory Liability, Current		40	41
Asset Retirement Obligation, Current		36	14
Other current liabilities		124	162
Total current liabilities		814	1,452
Long-term Debt, Excluding Current Maturities		3,925	4,821
Regulatory Liability, Noncurrent		669	800
Deferred income taxes		0	1,288
Asset Retirement Obligations, Noncurrent		35	75
Other long-term liabilities		218	194
Total liabilities		5,626	8,555
Commitments and contingencies
Shareholders' equity:
Accumulated other comprehensive loss, net		(53)	(187)
Total members' equity		2,904	8,844
Noncontrolling interests		4,091	1,385
Total equity		6,995	10,229
Members' Capital		2,957	9,031
Total liabilities and shareholder's equity		12,621	18,784
Parent Company [Member]
Current assets:
Cash and cash equivalents		623	13
Income taxes receivable		19	3
Other current assets		1,301	8
Total current assets		2,216	292
Goodwill		1,221	1,221
Other assets		488	695
Total assets		58,682	43,712
Current liabilities:
Short-term debt		0	1,590
Total current liabilities		991	2,374
Other long-term liabilities		1,468	530
Total liabilities		15,672	11,237
Shareholders' equity:
Preferred Stock, Value, Issued		$ 3,750	$ 0
Common Stock, Shares, Issued		76,000,000	77,000,000
Common Stock, Shares, Outstanding		76,000,000	77,000,000
Common stock		$ 0	$ 0
Additional paid-in capital		6,377	6,389
Retained earnings		35,093	28,296
Accumulated other comprehensive loss, net		(1,552)	(1,706)
Total shareholder's equity		43,010	32,449
Total liabilities and shareholder's equity		58,682	43,712
Deferred Income Tax Charge [Member] | MidAmerican Energy Company [Member]
Current liabilities:
Regulatory Liability, Noncurrent	[2]	$ 263	$ 478
[1]	The table does not include unused credit facilities and letters of credit for investments that are accounted for under the equity method.
[2]	Amounts primarily represent income tax liabilities primarily related to the federal tax rate change from 35% to 21% that are probable to be passed on to customers, offset by income tax benefits related to state accelerated tax depreciation and certain property-related basis differences that were previously passed on to customers and will be included in regulated rates when the temporary differences reverse.

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Shareholders' equity:
Common Stock, Shares Authorized	115,000,000	115,000,000
Common Stock, stated value per share	$ 0	$ 0
Common Stock, Shares, Issued	76,000,000	77,000,000
Common Stock, Shares, Outstanding	76,000,000	77,000,000
Total equity	$ 46,977	$ 32,578	$ 29,723	$ 28,308
Proceeds from Issuance of Preferred Stock and Preference Stock	3,750	0	0
Dividends, Preferred Stock	(26)	0	0
Acquisition of public interest in Northeast Midstream	(33)
Noncontrolling Interest, Increase from Sale of Parent Equity Interest	(3,916)
Distributions	(121)	(22)	(23)
Common stock, value, repurchased	(126)	(293)	(107)
Other equity transactions	$ 1	$ 3	11
PacifiCorp [Member]
Shareholders' equity:
Common Stock, Shares Authorized	750,000,000	750,000,000
Common Stock, stated value per share	$ 0	$ 0
Common Stock, Shares, Issued	357,000,000	357,000,000
Common Stock, Shares, Outstanding	357,000,000	357,000,000
MidAmerican Energy Company [Member]
Shareholders' equity:
Other equity transactions	$ (1)	$ 1
Nevada Power Company [Member]
Shareholders' equity:
Common Stock, Shares Authorized	1,000	1,000
Common Stock, stated value per share	$ 1	$ 1
Common Stock, Shares, Issued	1,000	1,000
Common Stock, Shares, Outstanding	1,000	1,000
Other equity transactions	$ 2
Sierra Pacific Power Company [Member]
Shareholders' equity:
Common Stock, Shares Authorized	20,000,000	20,000,000
Common Stock, stated value per share	$ 3.75	$ 3.75
Common Stock, Shares, Issued	1,000	1,000
Common Stock, Shares, Outstanding	1,000	1,000
Other equity transactions		$ (1)
Common Stock [Member]
Shareholders' equity:
Distributions	$ 0	0	0
Common stock, value, repurchased	0	0	0
Other equity transactions	0	0	0
Common Stock, Value, Outstanding	$ 0	$ 0	$ 0	$ 0
Common Stock [Member] | MidAmerican Energy Company [Member]
Shareholders' equity:
Common Stock, Shares Authorized	350,000,000	350,000,000
Common Stock, stated value per share	$ 0	$ 0
Common Stock, Shares, Issued	71,000,000	71,000,000
Common Stock, Shares, Outstanding	71,000,000	71,000,000
Common Stock [Member] | Nevada Power Company [Member]
Shareholders' equity:
Common Stock, Shares, Outstanding	1,000	1,000	1,000	1,000
Common Stock [Member] | Sierra Pacific Power Company [Member]
Shareholders' equity:
Common Stock, Shares, Outstanding	1,000	1,000	1,000	1,000
Preferred Stock [Member]
Shareholders' equity:
Proceeds from Issuance of Preferred Stock and Preference Stock	$ 3,750
Preferred Stock, Value, Outstanding	3,750	$ 0	$ 0	$ 0
Additional Paid-in Capital [Member]
Shareholders' equity:
Total equity	6,377	6,389	6,371	6,368
Acquisition of public interest in Northeast Midstream	(5)
Distributions	0	0	0
Common stock, value, repurchased	(6)	(15)	(6)
Other equity transactions	(1)	0	9
Retained Earnings [Member]
Shareholders' equity:
Total equity	35,093	28,296	25,624	22,206
Dividends, Preferred Stock	(26)
Distributions	0	0	0
Common stock, value, repurchased	(120)	(278)	(101)
Other equity transactions	0	0	1
Retained Earnings [Member] | MidAmerican Energy Company [Member]
Shareholders' equity:
Other equity transactions	(1)	1
Retained Earnings [Member] | Nevada Power Company [Member]
Shareholders' equity:
Other equity transactions	1
Retained Earnings [Member] | Sierra Pacific Power Company [Member]
Shareholders' equity:
Other equity transactions			(1)
Noncontrolling Interest [Member]
Shareholders' equity:
Total equity	3,967	129	130	132
Acquisition of public interest in Northeast Midstream	28
Noncontrolling Interest, Increase from Sale of Parent Equity Interest	3,916
Distributions	(121)	(22)	(23)
Common stock, value, repurchased	0	0	0
Other equity transactions	1	3	1
Long-term income tax receivable [Member]
Shareholders' equity:
Distributions	0	0	0
Common stock, value, repurchased	0	0	0
Other equity transactions	0	0	0
Accumulated Other Comprehensive Income (Loss) [Member]
Shareholders' equity:
Total equity	(1,552)	(1,706)	(1,945)	$ (398)
Distributions	0	0	0
Common stock, value, repurchased	0	0	0
Other equity transactions	1	0	0
Accumulated Other Comprehensive Income (Loss) [Member] | Nevada Power Company [Member]
Shareholders' equity:
Other equity transactions	$ 1
Accumulated Other Comprehensive Income (Loss) [Member] | Sierra Pacific Power Company [Member]
Shareholders' equity:
Other equity transactions		$ (1)	$ 1

Consolidated Statements of Oper

Consolidated Statements of Operations - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Operating revenue:
Total operating revenue		$ 20,952	$ 19,844	$ 19,787
Energy:
Cost of fuel and energy		4,187	4,586	4,769
Operations and maintenance		3,545	3,318	3,440
Depreciation and amortization		3,410	2,965	2,933
Total operating expenses		16,661	15,694	15,715
Taxes, Miscellaneous		634	574	573
Real estate		4,885	4,251	4,000
Operating income		4,291	4,150	4,072
Other income (expense):
Interest expense		(2,021)	(1,912)	(1,838)
Capitalized interest and allowance for borrowed funds		80	77	61
Allowance for equity funds		165	173	104
Other Interest and Dividend Income		71	117	113
Gain (Loss) on Investments		4,797	(288)	(538)
Other, net		88	97	(9)
Total other income (expense)		3,180	(1,736)	(2,107)
Income before income tax expense (benefit) and equity (loss) income		7,471	2,414	1,965
Income tax expense (benefit)		308	(598)	(583)
Equity income (loss)		(149)	(44)	43
Net income		7,014	2,968	2,591
Net income attributable to noncontrolling interests		71	18	23
Net income (loss) attributable to parent		6,943	2,950	2,568
Dividends, Preferred Stock		26	0	0
Undistributed Earnings (Loss) Available to Common Shareholders, Diluted		6,917	2,950	2,568
Electricity and natural gas [Member]
Operating revenue:
Total operating revenue		15,556	15,371	15,573
Residential real estate brokerage and mortgage businesses [Member]
Operating revenue:
Total operating revenue		5,396	4,473	4,214
PacifiCorp [Member]
Operating revenue:
Total operating revenue		5,341	5,068	5,026
Energy:
Cost of fuel and energy		1,790	1,795	1,757
Operations and maintenance		1,209	1,048	1,038
Depreciation and amortization		1,209	954	979
Property and other taxes		209	199	201
Total operating costs and expenses		4,417	3,996	3,975
Operating income		924	1,072	1,051
Other income (expense):
Interest expense		(426)	(401)	(384)
Capitalized interest and allowance for borrowed funds		48	36	18
Allowance for equity funds		98	72	35
Interest and dividend income		10	21	15
Other, net		10	32	8
Total other income (expense)		(260)	(240)	(308)
Income before income tax expense (benefit) and equity (loss) income		664	832	743
Income tax expense (benefit)		(75)	61	5
Net income (loss) attributable to parent		739	771	738
MidAmerican Energy Company [Member]
Operating revenue:
Total operating revenue		2,720	2,925	3,049
Energy:
Operations and maintenance		754	800	811
Depreciation and amortization		716	639	609
Property and other taxes		135	126	125
Total operating expenses		2,272	2,377	2,498
Operating income		448	548	551
Other income (expense):
Interest expense		(304)	(281)	(227)
Capitalized interest and allowance for borrowed funds		15	27	20
Allowance for equity funds		45	78	53
Other, net		52	50	30
Total other income (expense)		(192)	(126)	(124)
Income before income tax expense (benefit) and equity (loss) income		256	422	427
Income tax expense (benefit)		(570)	(371)	(255)
Net income (loss) attributable to parent		826	793	682
MidAmerican Energy Company [Member] | Electricity, US Regulated [Member]
Operating revenue:
Total operating revenue		2,139	2,237	2,283
Energy:
Cost of fuel and energy		339	399	487
MidAmerican Energy Company [Member] | Regulated natural gas and other [Member]
Operating revenue:
Total operating revenue		581	688	766
Energy:
Cost of fuel and energy		328	413	466
MidAmerican Funding, LLC and Subsidiaries [Member]
Operating revenue:
Total operating revenue		2,728	2,927	3,053
Energy:
Operations and maintenance		755	801	813
Depreciation and amortization		716	639	609
Property and other taxes		135	127	125
Total operating expenses		2,274	2,378	2,503
Operating income		454	549	550
Other income (expense):
Interest expense		(322)	(302)	(247)
Capitalized interest and allowance for borrowed funds		15	27	20
Allowance for equity funds		45	78	53
Other, net		52	52	31
Total other income (expense)		(210)	(145)	(143)
Income before income tax expense (benefit) and equity (loss) income		244	404	407
Income tax expense (benefit)		(574)	(377)	(262)
Net income (loss) attributable to parent		818	781	669
MidAmerican Funding, LLC and Subsidiaries [Member] | Electricity, US Regulated [Member]
Operating revenue:
Total operating revenue		2,139	2,237	2,283
Energy:
Cost of fuel and energy		339	399	487
MidAmerican Funding, LLC and Subsidiaries [Member] | Regulated natural gas and other [Member]
Operating revenue:
Total operating revenue		589	690	770
Energy:
Cost of fuel and energy		329	412	469
Nevada Power Company [Member]
Operating revenue:
Total operating revenue		1,998	2,148	2,184
Energy:
Cost of fuel and energy		816	943	917
Operations and maintenance		299	324	443
Depreciation and amortization		361	357	337
Property and other taxes		47	45	41
Total operating expenses		1,523	1,669	1,738
Operating income		475	479	446
Other income (expense):
Interest expense		(162)	(171)	(170)
Capitalized interest and allowance for borrowed funds		3	3	2
Allowance for equity funds		7	5	3
Other, net		19	21	17
Total other income (expense)		(133)	(142)	(148)
Income before income tax expense (benefit) and equity (loss) income		342	337	298
Income tax expense (benefit)		47	73	72
Net income (loss) attributable to parent		295	264	226
Sierra Pacific Power Company [Member]
Operating revenue:
Total operating revenue		854	889	855
Energy:
Operations and maintenance		162	172	190
Depreciation and amortization		141	125	119
Property and other taxes		23	22	23
Total operating expenses		689	718	703
Operating income		165	171	152
Other income (expense):
Interest expense		(56)	(48)	(44)
Capitalized interest and allowance for borrowed funds		2	1	1
Allowance for equity funds		4	3	4
Other, net		11	4	9
Total other income (expense)		(39)	(40)	(30)
Income before income tax expense (benefit) and equity (loss) income		126	131	122
Income tax expense (benefit)		15	28	30
Net income (loss) attributable to parent		111	103	92
Sierra Pacific Power Company [Member] | Electricity, US Regulated [Member]
Operating revenue:
Total operating revenue		738	770	752
Energy:
Cost of fuel and energy		301	337	322
Sierra Pacific Power Company [Member] | Natural Gas, US Regulated [Member]
Operating revenue:
Total operating revenue		116	119	103
Energy:
Cost of fuel and energy		62	62	49
Eastern Energy Gas Holdings, LLC [Member]
Operating revenue:
Total operating revenue		2,090	2,169	1,996
Cost of fuel and energy		24	9	(6)
Energy:
Operations and maintenance		1,142	748	774
Depreciation and amortization		366	367	333
Property and other taxes		140	141	108
Total operating expenses		1,672	1,265	1,209
Operating income		418	904	787
Other income (expense):
Interest expense		(333)	(311)	(174)
Allowance for equity funds		13	18	15
Interest and dividend income		67	105	26
Other, net		42	43	48
Total other income (expense)		(211)	(145)	(85)
Income before income tax expense (benefit) and equity (loss) income		207	759	702
Income tax expense (benefit)		(24)	101	124
Equity income (loss)		42	43	54
Net income from continuing operations		273	701	632
Net income from discontinued operations	[1]	0	141	24
Net income		273	842	656
Net income attributable to noncontrolling interests		164	121	175
Net income (loss) attributable to parent		$ 109	$ 721	$ 481
[1]	Includes income tax expense of $33 million and less than $1 million for the years ended December 31, 2019 and 2018, respectively.

Consolidated Statements of Op_2

Consolidated Statements of Operations (Parenthetical) $ in Millions	12 Months Ended
	Dec. 31, 2019USD ($)
Income tax expense	$ 33
Eastern Energy Gas Holdings, LLC [Member]
Income tax expense, discontinued operations	$ 33

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Net income	$ 7,014	$ 2,968	$ 2,591
Net income (loss) attributable to parent	6,943	2,950	2,568
Other comprehensive income (loss), net of tax:
Unrecognized amounts on retirement benefits, net of tax	(65)	(59)	25
Foreign currency translation adjustment	233	327	(494)
Unrealized (losses) gains on cash flow hedges, net of tax	(15)	(29)	7
Other comprehensive income (loss)	153	239	(462)
Comprehensive income	7,167	3,207	2,129
Comprehensive income attributable to noncontrolling interests	71	18	23
Comprehensive income attributable to shareholders	7,096	3,189	2,106
Accumulated Other Comprehensive Income (Loss) [Member]
Other comprehensive income (loss), net of tax:
Unrecognized amounts on retirement benefits, net of tax	(65)	(59)	25
Foreign currency translation adjustment	233	327	(494)
Unrealized (losses) gains on cash flow hedges, net of tax	(15)	(29)	7
Other comprehensive income (loss)	153	239	(462)
Parent Company [Member]
Net income	6,944	2,954	2,571
Net income (loss) attributable to parent	6,943	2,951	2,568
Other comprehensive income (loss), net of tax:
Other comprehensive income (loss)	153	239	(462)
Comprehensive income	7,097	3,193	2,109
Comprehensive income attributable to noncontrolling interests	1	3	3
Comprehensive income attributable to shareholders	7,096	3,190	2,106
Nevada Power Company [Member]
Net income (loss) attributable to parent	295	264	226
PacifiCorp [Member]
Net income (loss) attributable to parent	739	771	738
Other comprehensive income (loss), net of tax:
Unrecognized amounts on retirement benefits, net of tax	(3)	(3)	2
Other comprehensive income (loss)	(3)	(4)	2
Comprehensive income attributable to shareholders	736	768	740
PacifiCorp [Member] | Accumulated Other Comprehensive Income (Loss) [Member]
Net income (loss) attributable to parent	0	0	0
Other comprehensive income (loss), net of tax:
Other comprehensive income (loss)	(3)	(3)	2
MidAmerican Energy Company [Member]
Net income (loss) attributable to parent	826	793	682
MidAmerican Funding, LLC and Subsidiaries [Member]
Net income (loss) attributable to parent	818	781	669
Eastern Energy Gas Holdings, LLC [Member]
Net income	273	842	656
Net income (loss) attributable to parent	109	721	481
Other comprehensive income (loss), net of tax:
Unrecognized amounts on retirement benefits, net of tax	(94)	(38)	48
Unrealized (losses) gains on cash flow hedges, net of tax			3
Unrealized (losses) gains on cash flow hedges, net of tax	30	(56)
Other comprehensive income (loss)	124	(18)	(45)
Comprehensive income	397	824	611
Comprehensive income attributable to noncontrolling interests	154	120	175
Comprehensive income attributable to shareholders	243	704	436
Eastern Energy Gas Holdings, LLC [Member] | Accumulated Other Comprehensive Income (Loss) [Member]
Other comprehensive income (loss), net of tax:
Other comprehensive income (loss)	$ 134	$ (17)	$ (45)

Consolidated Statements of Co_2

Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Unrecognized amounts on retirement benefits, net of tax	$ (19)	$ (15)	$ 8
Unrealized gains on marketable securities, net of tax of $-, $- and $-	(3)	(8)	1
PacifiCorp [Member]
Unrecognized amounts on retirement benefits, net of tax	(1)	(1)	1
Eastern Energy Gas Holdings, LLC [Member]
Unrecognized amounts on retirement benefits, net of tax	40	15	(18)
Unrealized gains (losses) on cash flow hedges, net of tax	$ (10)	$ 20
Unrealized gains on marketable securities, net of tax of $-, $- and $-			$ (2)

Consolidated Statements of Chan

Consolidated Statements of Changes in Equity - USD ($) $ in Millions	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Retained Earnings [Member]Cumulative Effect, Period of Adoption, Adjustment [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Accumulated Other Comprehensive Income (Loss) [Member]Cumulative Effect, Period of Adoption, Adjustment [Member]	Noncontrolling Interest [Member]	Long-term income tax receivable [Member]	PacifiCorp [Member]	PacifiCorp [Member]Preferred Stock [Member]	PacifiCorp [Member]Common Stock [Member]	PacifiCorp [Member]Additional Paid-in Capital [Member]	PacifiCorp [Member]Retained Earnings [Member]	PacifiCorp [Member]Accumulated Other Comprehensive Income (Loss) [Member]	MidAmerican Energy Company [Member]	MidAmerican Energy Company [Member]Common Stock [Member]	MidAmerican Energy Company [Member]Additional Paid-in Capital [Member]	MidAmerican Energy Company [Member]Retained Earnings [Member]	MidAmerican Funding, LLC and Subsidiaries [Member]	MidAmerican Funding, LLC and Subsidiaries [Member]Additional Paid-in Capital [Member]	MidAmerican Funding, LLC and Subsidiaries [Member]Retained Earnings [Member]	Nevada Power Company [Member]	Nevada Power Company [Member]Common Stock [Member]	Nevada Power Company [Member]Additional Paid-in Capital [Member]	Nevada Power Company [Member]Retained Earnings [Member]	Nevada Power Company [Member]Accumulated Other Comprehensive Income (Loss) [Member]	Sierra Pacific Power Company [Member]	Sierra Pacific Power Company [Member]Common Stock [Member]	Sierra Pacific Power Company [Member]Additional Paid-in Capital [Member]	Sierra Pacific Power Company [Member]Retained Earnings [Member]	Sierra Pacific Power Company [Member]Accumulated Other Comprehensive Income (Loss) [Member]	Eastern Energy Gas Holdings, LLC [Member]	Eastern Energy Gas Holdings, LLC [Member]Dominion Energy Questar Pipeline Services, Inc. [Member]	Eastern Energy Gas Holdings, LLC [Member]Cove Point LNG, LP [Member]	Eastern Energy Gas Holdings, LLC [Member]Accumulated Other Comprehensive Income (Loss) [Member]	Eastern Energy Gas Holdings, LLC [Member]Noncontrolling Interest [Member]	Eastern Energy Gas Holdings, LLC [Member]Noncontrolling Interest [Member]Cove Point LNG, LP [Member]	Eastern Energy Gas Holdings, LLC [Member]Member Units [Member]	Eastern Energy Gas Holdings, LLC [Member]Member Units [Member]Dominion Energy Questar Pipeline Services, Inc. [Member]	Eastern Energy Gas Holdings, LLC [Member]Member Units [Member]Cove Point LNG, LP [Member]	Eastern Energy Gas Holdings, LLC [Member]Predecessor Equity [Member]
Balance (shares) at Dec. 31, 2017																								1,000					1,000
Balance at Dec. 31, 2017					$ 1,085		$ (1,085)			$ 7,555	$ 2	$ 0	$ 4,479	$ 3,089	$ (15)	$ 5,764	$ 0	$ 561	$ 5,203	$ 6,660	$ 1,679	$ 4,981	$ 2,678	$ 0	$ 2,308	$ 374	$ (4)	$ 1,172	$ 0	$ 1,111	$ 62	$ (1)				$ (98)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 2,588	$ 0	$ 0	$ 2,568		$ 0		$ 20
Net income (loss) attributable to parent	2,568									738			0	738	0	682			682	669		669	226			226		92			92		$ 481
Other comprehensive income (loss)	(462)	0	0	0		(462)		0		2			0	0	2																		(45)			(45)
Noncontrolling Interest, Increase from Sale of Parent Equity Interest																																	4				$ 4
Contributions																																	48									$ 48
Distributions																																	(296)				(138)		$ (25)			(133)
Remeasurement of noncontrolling interest in Northeast Midstream																																	0				(375)					375
Reclassification of long-term income tax receivable	609								$ 609
Long-term income tax receivable adjustments	(17)		0	(135)					(152)
Distributions	(23)	0	0	0		0		(23)	0																								0				27					(27)
Common stock dividends declared										(450)			0	(450)	0
Common stock, value, repurchased	(107)	0	(6)	(101)		0		0	0
Other equity transactions	11	0	9	1		0		1	0																						(1)	1
Balance (shares) at Dec. 31, 2018																								1,000					1,000
Balance at Dec. 31, 2018	29,723		6,371	25,624		(1,945)		130																									8,865			(169)	2,664		4,566			1,804
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	2,591																																656				175		301			180
Balance at Dec. 31, 2018										7,845	2	0	4,479	3,377	(13)	6,446	$ 0	561	5,885	7,329	1,679	5,650	2,904	$ 0	2,308	600	(4)	1,264	$ 0	1,111	153	0				(169)
Long-term income tax receivable									457
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	2,968	0	0	2,950		0		18
Net income (loss) attributable to parent	2,950									771			0	771	0	793			793	781		781	264			264		103			103		721
Other comprehensive income (loss)	239	0	0	0		239		0		(4)			0	(1)	(3)																		(18)			(17)	(1)
Contributions																																	3,385									3,385
Distribution to parent																				(8)		(8)
Long-term income tax receivable adjustments	(40)		(33)	0					(73)
Distributions	(22)	0	0	0		0		(22)	0																								(636)				(179)					(457)
Acquisition of public interest in Northeast Midstream																																	(40)				(1,221)					1,181
Dominion Energy Gas Restructuring																																	(2,168)			(1)			3,978			(6,145)
Common stock dividends declared										$ (175)			0	(175)	0								$ (371)			(371)		(46)			(46)
Common stock, value, repurchased	(293)	0	(15)	(278)		0		0	0
Other equity transactions	$ 3	0	0	0		0		3	0							1			1	(1)		(1)						$ (1)				(1)	(1)				1		(2)
Balance (shares) at Dec. 31, 2019	77,000,000									357,000,000							71,000,000						1,000	1,000				1,000	1,000
Balance at Dec. 31, 2019	$ 32,578		6,389	28,296		(1,706)		129																									10,229			(187)	1,385		9,031			0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	2,968																																842				121		489			$ 232
Balance at Dec. 31, 2019	32,449									$ 8,437	2	0	4,479	3,972	(16)	7,240	$ 0	561	6,679	8,101	1,679	6,422	$ 2,797	$ 0	2,308	493	(4)	$ 1,320	$ 0	1,111	210	(1)				(187)
Long-term income tax receivable	530								530
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	7,013	0	0	6,943		0		70
Net income (loss) attributable to parent	6,943									739			0	739	0	826			826	818		818	295			295		111			111		109
Other comprehensive income (loss)	153	0	0	0		153		0		$ (3)			0	0	(3)																		124			134	(10)
Noncontrolling Interest, Increase from Sale of Parent Equity Interest																																			$ 0			$ 2,765			$ (2,765)
Contributions																																	1,223						1,223
Long-term income tax receivable adjustments	(128)		0	0					(128)
Distributions	(121)	0	0	0		0		(121)	0																								(4,498)				(216)		(4,282)
Stockholders' Equity, Distribution Of Net Assets Of Subsidiary To Affiliate																																		$ 699						$ 699
Acquisition of public interest in Northeast Midstream	(33)		(5)					28																									(343)						(343)
Common stock dividends declared																							(155)			(155)		$ (20)			(20)
Common stock, value, repurchased	(126)	0	(6)	(120)		0		0	0
Other equity transactions	$ 1	$ 0	(1)	0		1		1	0							(1)			(1)				$ 2			1	1						0				3		(3)
Balance (shares) at Dec. 31, 2020	76,000,000									357,000,000							71,000,000						1,000	1,000				1,000	1,000
Balance at Dec. 31, 2020	$ 46,977		$ 6,377	$ 35,093		$ (1,552)		$ 3,967																									6,995			(53)	4,091		2,957
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	7,014																																$ 273				$ 164		$ 109
Balance at Dec. 31, 2020	43,010									$ 9,173	$ 2	$ 0	$ 4,479	$ 4,711	$ (19)	$ 8,065	$ 0	$ 561	$ 7,504	$ 8,919	$ 1,679	$ 7,240	$ 2,939	$ 0	$ 2,308	$ 634	$ (3)	$ 1,411	$ 0	$ 1,111	$ 301	$ (1)				$ (53)
Long-term income tax receivable	$ 658								$ 658

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Cash flows from operating activities:
Net income	$ 7,014	$ 2,968	$ 2,591
Net income (loss) attributable to parent	6,943	2,950	2,568
Adjustments to reconcile net income to net cash flows from operating activities:
Gain (Loss) on Investments	(4,797)	288	538
Other Nonrecurring (Income) Expense	54	43	56
Depreciation and amortization	3,455	3,011	2,984
Allowance for equity funds	(165)	(173)	(104)
Changes in regulatory assets and liabilities	(415)	153	196
Deferred income taxes and amortization of investment tax credits	1,880	290	8
Equity (income) loss, net of distributions	149	44	(43)
Equity loss, net of distributions	248	93	45
Other, net	(77)	23	67
Changes in other operating assets and liabilities, net of effects from acquisitions:
Trade receivables and other assets	(1,318)	(372)	72
Derivative collateral, net	43	(25)	27
Pension and other postretirement benefit plans	(65)	(51)	(54)
Accrued property, income and other taxes, net	(134)	(16)	199
Accounts payable and other liabilities	501	(26)	145
Net cash flows from operating activities	6,224	6,206	6,770
Cash flows from investing activities:
Capital expenditures	(6,765)	(7,364)	(6,241)
Acquisitions, net of cash acquired	(2,397)	(27)	(106)
Purchases of marketable securities	(370)	(262)	(329)
Proceeds from sales of marketable securities	325	238	287
Equity method investments	(2,724)	(1,617)	(683)
Other, net	(1,234)	69	83
Net cash flows from investing activities	(13,165)	(8,963)	(6,989)
Cash flows from financing activities:
Proceeds from BHE senior debt	5,212	0	3,166
Repayments of BHE senior debt	(350)	0	(1,045)
Proceeds from Issuance of Preferred Stock and Preference Stock	3,750	0	0
Payments for Repurchase of Common Stock	(126)	(293)	(107)
Proceeds from subsidiary debt	2,688	4,699	2,352
Repayments of subsidiary debt	(2,841)	(1,914)	(2,422)
Net (repayments of) proceeds from short-term debt	(939)	684	(1,946)
Business acquisition, acquisition of remaining noncontrolling interest	(33)	0	(131)
Other, net	(258)	(52)	(41)
Net cash flows from financing activities	7,103	3,124	(174)
Effect of exchange rate changes	15	18	(7)
Net change in cash and cash equivalents and restricted cash	177	385	(400)
Cash and cash equivalents and restricted cash and cash equivalents at end of period	1,268	883	1,283
Cash and cash equivalents and restricted cash and cash equivalents at end of period	1,445	1,268	883
Parent Company [Member]
Cash flows from operating activities:
Net income	6,944	2,954	2,571
Net income (loss) attributable to parent	6,943	2,951	2,568
Adjustments to reconcile net income to net cash flows from operating activities:
Depreciation and amortization	4	5	4
Equity (income) loss, net of distributions	(3,832)	(3,419)	(3,058)
Changes in other operating assets and liabilities, net of effects from acquisitions:
Net cash flows from operating activities	1,639	1,780	1,885
Cash flows from investing activities:
Investments in subsidiaries	6,422	1,972	1,791
Purchases of marketable securities	(1,345)	(42)	(44)
Proceeds from sales of marketable securities	22	42	45
Repayment of (Issuance of) Notes Receivable with Related Parties, Net	(121)	(112)	(72)
Other, net	(20)	(5)	(22)
Net cash flows from investing activities	(7,886)	(2,089)	(1,884)
Cash flows from financing activities:
Proceeds from BHE senior debt	5,212	0	3,166
Proceeds from Issuance of Preferred Stock and Preference Stock	3,750	0	0
Payments for Repurchase of Common Stock	(126)	(293)	(107)
Net (repayments of) proceeds from short-term debt	(1,590)	607	(2,348)
Other, net	(39)	(1)	(4)
Net cash flows from financing activities	6,857	313	(338)
Net change in cash and cash equivalents and restricted cash	610	4	(337)
MidAmerican Energy Company [Member]
Cash flows from operating activities:
Net income (loss) attributable to parent	826	793	682
Adjustments to reconcile net income to net cash flows from operating activities:
Depreciation and amortization	716	639	609
Allowance for equity funds	(45)	(78)	(53)
Amortization of Utility Plant to Other Operating Expense	34	33	34
Deferred income taxes and amortization of investment tax credits	208	154	33
Asset Retirement Obligation, Cash Paid to Settle	(124)	(14)	(28)
Other, net	(18)	4	40
Changes in other operating assets and liabilities, net of effects from acquisitions:
Trade receivables and other assets	48	60	(25)
Inventories	(52)	(22)	41
Pension and other postretirement benefit plans	(19)	(10)	(13)
Accrued property, income and other taxes, net	(64)	(76)	218
Accounts payable and other liabilities	33	7	(30)
Net cash flows from operating activities	1,543	1,490	1,508
Cash flows from investing activities:
Capital expenditures	(1,836)	(2,810)	(2,332)
Purchases of marketable securities	(281)	(156)	(263)
Proceeds from sales of marketable securities	269	138	223
Proceeds from Sales of Business, Affiliate and Productive Assets	2	1	17
Other investment proceeds	9	13	15
Other, net	11	13	30
Net cash flows from investing activities	(1,826)	(2,801)	(2,310)
Cash flows from financing activities:
Proceeds from long-term debt	0	2,326	687
Net (repayments of) proceeds from short-term debt	0	(240)	240
Repayments of Long-term Debt	0	(500)	(350)
Other, net	(2)	(1)	(1)
Net cash flows from financing activities	(2)	1,585	576
Net change in cash and cash equivalents and restricted cash	(285)	274	(226)
Cash and cash equivalents and restricted cash and cash equivalents at end of period	330	56	282
Cash and cash equivalents and restricted cash and cash equivalents at end of period	45	330	56
PacifiCorp [Member]
Cash flows from operating activities:
Net income (loss) attributable to parent	739	771	738
Adjustments to reconcile net income to net cash flows from operating activities:
Depreciation and amortization	1,209	954	979
Allowance for equity funds	(98)	(72)	(35)
Changes in regulatory assets and liabilities	(229)	(55)	87
Deferred income taxes and amortization of investment tax credits	(124)	(131)	(199)
Other, net	1	20	5
Changes in other operating assets and liabilities, net of effects from acquisitions:
Trade receivables and other assets	(154)	26	31
Inventories	(88)	23	16
Increase (Decrease) in Prepaid Expense	(15)	(12)	31
Derivative collateral, net	23	12	15
Accrued property, income and other taxes, net	(53)	22	60
Accounts payable and other liabilities	372	(11)	83
Net cash flows from operating activities	1,583	1,547	1,811
Cash flows from investing activities:
Capital expenditures	(2,540)	(2,175)	(1,257)
Other, net	30	11	5
Net cash flows from investing activities	(2,510)	(2,164)	(1,252)
Cash flows from financing activities:
Proceeds from long-term debt	987	989	593
Net (repayments of) proceeds from short-term debt	(37)	100	(50)
Repayments of Long-term Debt	(38)	(350)	(586)
Common stock dividends	0	(175)	(450)
Other, net	(2)	(3)	(3)
Net cash flows from financing activities	910	561	(496)
Net change in cash and cash equivalents and restricted cash	(17)	(56)	63
Cash and cash equivalents and restricted cash and cash equivalents at end of period	36	92	29
Cash and cash equivalents and restricted cash and cash equivalents at end of period	19	36	92
MidAmerican Funding, LLC and Subsidiaries [Member]
Cash flows from operating activities:
Net income (loss) attributable to parent	818	781	669
Adjustments to reconcile net income to net cash flows from operating activities:
Depreciation and amortization	716	639	609
Allowance for equity funds	(45)	(78)	(53)
Amortization of Utility Plant to Other Operating Expense	34	33	34
Deferred income taxes and amortization of investment tax credits	211	152	32
Asset Retirement Obligation, Cash Paid to Settle	(124)	(14)	(28)
Other, net	(17)	5	43
Changes in other operating assets and liabilities, net of effects from acquisitions:
Trade receivables and other assets	48	56	(19)
Inventories	(52)	(22)	41
Pension and other postretirement benefit plans	(19)	(10)	(13)
Accrued property, income and other taxes, net	(66)	(74)	230
Accounts payable and other liabilities	32	7	(29)
Net cash flows from operating activities	1,536	1,475	1,516
Cash flows from investing activities:
Capital expenditures	(1,836)	(2,810)	(2,332)
Purchases of marketable securities	(281)	(156)	(263)
Proceeds from sales of marketable securities	269	138	223
Proceeds from Sales of Business, Affiliate and Productive Assets	3	1	17
Other investment proceeds	9	13	15
Other, net	11	13	30
Net cash flows from investing activities	(1,825)	(2,801)	(2,310)
Cash flows from financing activities:
Proceeds from long-term debt	0	2,326	687
Net (repayments of) proceeds from short-term debt	0	(240)	240
Repayments of Long-term Debt	0	(500)	(350)
Increase (Decrease) in Notes Payable, Related Parties, Current	5	15	(8)
Other, net	(1)	(1)	0
Net cash flows from financing activities	4	1,600	569
Net change in cash and cash equivalents and restricted cash	(285)	274	(225)
Cash and cash equivalents and restricted cash and cash equivalents at end of period	331	57	282
Cash and cash equivalents and restricted cash and cash equivalents at end of period	46	331	57
Nevada Power Company [Member]
Cash flows from operating activities:
Net income (loss) attributable to parent	295	264	226
Adjustments to reconcile net income to net cash flows from operating activities:
Depreciation and amortization	361	357	337
Allowance for equity funds	(7)	(5)	(3)
Changes in regulatory assets and liabilities	(42)	27	83
Deferred income taxes and amortization of investment tax credits	(10)	(32)	(13)
Deferred Energy Change	(44)	51	(11)
Amortization of deferred energy	(41)	43	16
Other, net	2	(5)	14
Changes in other operating assets and liabilities, net of effects from acquisitions:
Trade receivables and other assets	45	19	5
Inventories	(7)	1	(1)
Accrued property, income and other taxes, net	5	(13)	(35)
Accounts payable and other liabilities	(90)	(6)	1
Net cash flows from operating activities	467	701	619
Cash flows from investing activities:
Capital expenditures	(455)	(409)	(298)
Proceeds from sale of assets	26	2	1
Net cash flows from investing activities	(429)	(407)	(297)
Cash flows from financing activities:
Proceeds from long-term debt	718	495	573
Repayments of Long-term Debt	(575)	(500)	(824)
Common stock dividends	(155)	(371)	0
Other, net	15	14	16
Net cash flows from financing activities	(27)	(390)	(267)
Net change in cash and cash equivalents and restricted cash	11	(96)	55
Cash and cash equivalents and restricted cash and cash equivalents at end of period	25	121	66
Cash and cash equivalents and restricted cash and cash equivalents at end of period	36	25	121
Sierra Pacific Power Company [Member]
Cash flows from operating activities:
Net income (loss) attributable to parent	111	103	92
Adjustments to reconcile net income to net cash flows from operating activities:
Depreciation and amortization	141	125	119
Allowance for equity funds	(4)	(3)	(4)
Changes in regulatory assets and liabilities	(33)	25	42
Deferred income taxes and amortization of investment tax credits	12	9	7
Deferred Energy Change	(17)	15	9
Amortization of deferred energy	(14)	(2)	(10)
Other, net	(2)	0	0
Changes in other operating assets and liabilities, net of effects from acquisitions:
Trade receivables and other assets	(81)	(6)	3
Inventories	(19)	(5)	(4)
Accrued property, income and other taxes, net	9	(16)	3
Accounts payable and other liabilities	87	(8)	18
Net cash flows from operating activities	190	237	275
Cash flows from investing activities:
Capital expenditures	(246)	(248)	(205)
Other, net	0	1	0
Net cash flows from investing activities	(246)	(247)	(205)
Cash flows from financing activities:
Proceeds from long-term debt	30	125	0
Repayments of Long-term Debt	0	(109)	0
Proceeds from Short-term Debt	45	0	0
Common stock dividends	(20)	(46)	0
Other, net	(5)	(4)	(2)
Net cash flows from financing activities	50	(34)	(2)
Net change in cash and cash equivalents and restricted cash	(6)	(44)	68
Cash and cash equivalents and restricted cash and cash equivalents at end of period	32	76	8
Cash and cash equivalents and restricted cash and cash equivalents at end of period	26	32	76
Eastern Energy Gas Holdings, LLC [Member]
Cash flows from operating activities:
Net income	273	842	656
Net income (loss) attributable to parent	109	721	481
Adjustments to reconcile net income to net cash flows from operating activities:
Other Nonrecurring (Income) Expense	531	21	273
Depreciation and amortization	366	445	424
Depreciation and amortization	366	367	333
Allowance for equity funds	(13)	(18)	(15)
Changes in regulatory assets and liabilities	(37)	(74)	(64)
Deferred income taxes and amortization of investment tax credits	(5)	(3)	380
Equity (income) loss, net of distributions	(42)	(43)	(54)
Equity loss, net of distributions	35	31	9
Other, net	23	61	30
Changes in other operating assets and liabilities, net of effects from acquisitions:
Trade receivables and other assets	346	115	(393)
Derivative collateral, net	(140)	7	4
Pension and other postretirement benefit plans	(88)	(139)	(153)
Accrued property, income and other taxes, net	23	(53)	18
Accounts payable and other liabilities	(40)	(173)	22
Net cash flows from operating activities	1,274	1,062	1,191
Cash flows from investing activities:
Capital expenditures	(374)	(704)	(1,109)
Loans to affiliates	0	(1,872)	(2,986)
Repayment of loans by affiliates	3,422	3,748	0
Other, net	16	(22)	89
Net cash flows from investing activities	3,064	1,150	(4,006)
Cash flows from financing activities:
Proceeds from long-term debt	0	1,895	3,750
Net (repayments of) proceeds from short-term debt	(62)	52	(619)
(Repayment) issuance of affiliated current borrowings, net	(251)	(2,837)	291
Proceeds from (Repayments of) Lines of Credit	0	(73)	73
Proceeds from Noncontrolling Interests	1,223	3,385	25
Distributions	(4,539)	(636)	(296)
Repayments of Long-term Debt	(700)	(4,141)	(251)
Other, net	0	(16)	(17)
Net cash flows from financing activities	(4,329)	(2,371)	2,956
Net change in cash and cash equivalents and restricted cash	9	(159)	141
Cash and cash equivalents and restricted cash and cash equivalents at end of period	39	198	57
Cash and cash equivalents and restricted cash and cash equivalents at end of period	$ 48	$ 39	$ 198

Organization and Operations (No

Organization and Operations (Notes)	12 Months Ended
	Dec. 31, 2020
Segment Reporting Information [Line Items]
Organization and Operations	Organization and Operations Berkshire Hathaway Energy Company ("BHE") is a holding company that owns a highly diversified portfolio of locally managed businesses principally engaged in the energy industry (collectively with its subsidiaries, the "Company") and is a consolidated subsidiary of Berkshire Hathaway Inc. ("Berkshire Hathaway"). The Company's operations are organized as eight business segments: PacifiCorp and its subsidiaries ("PacifiCorp"), MidAmerican Funding, LLC and its subsidiaries ("MidAmerican Funding") (which primarily consists of MidAmerican Energy Company ("MidAmerican Energy")), NV Energy, Inc. and its subsidiaries ("NV Energy") (which primarily consists of Nevada Power Company and its subsidiaries ("Nevada Power") and Sierra Pacific Power Company ("Sierra Pacific")), Northern Powergrid Holdings Company ("Northern Powergrid") (which primarily consists of Northern Powergrid (Northeast) plc and Northern Powergrid (Yorkshire) plc), BHE Pipeline Group, LLC and its subsidiaries (which primarily consists of BHE GT&S, LLC ("BHE GT&S"), Northern Natural Gas Company ("Northern Natural Gas") and Kern River Gas Transmission Company ("Kern River")), BHE Transmission (which consists of BHE Canada Holdings Corporation ("BHE Canada") (which primarily consists of AltaLink, L.P. ("AltaLink")) and BHE U.S. Transmission, LLC), BHE Renewables (which primarily consists of BHE Renewables, LLC and CalEnergy Philippines) and HomeServices of America, Inc. and its subsidiaries ("HomeServices"). The Company, through these locally managed and operated businesses, owns four utility companies in the United States serving customers in 11 states, two electricity distribution companies in Great Britain, five interstate natural gas pipeline companies and interests in a liquefied natural gas ("LNG") export, import and storage facility in the United States, an electric transmission business in Canada, interests in electric transmission businesses in the United States, a renewable energy business primarily investing in wind, solar, geothermal and hydroelectric projects, the largest residential real estate brokerage firm in the United States and one of the largest residential real estate brokerage franchise networks in the United States.
PacifiCorp [Member]
Segment Reporting Information [Line Items]
Organization and Operations	Organization and Operations PacifiCorp, which includes PacifiCorp and its subsidiaries, is a United States regulated electric utility company serving retail customers, including residential, commercial, industrial, irrigation and other customers in portions of Utah, Oregon, Wyoming, Washington, Idaho and California. PacifiCorp owns, or has interests in, a number of thermal, hydroelectric, wind-powered and geothermal generating facilities, as well as electric transmission and distribution assets. PacifiCorp also buys and sells electricity on the wholesale market with other utilities, energy marketing companies, financial institutions and other market participants. PacifiCorp is subject to comprehensive state and federal regulation. PacifiCorp's subsidiaries support its electric utility operations by providing coal mining services. PacifiCorp is an indirect subsidiary of Berkshire Hathaway Energy Company ("BHE"), a holding company based in Des Moines, Iowa that owns subsidiaries principally engaged in energy businesses. BHE is a consolidated subsidiary of Berkshire Hathaway Inc. ("Berkshire Hathaway").
MidAmerican Energy Company [Member]
Segment Reporting Information [Line Items]
Organization and Operations	MidAmerican Energy Company ("MidAmerican Energy") is a public utility with electric and natural gas operations and is the principal subsidiary of MHC Inc. ("MHC"). MHC is a holding company that conducts no business other than the ownership of its subsidiaries and related corporate services. MHC's nonregulated subsidiary is Midwest Capital Group, Inc. MHC is the direct wholly owned subsidiary of MidAmerican Funding, LLC, ("MidAmerican Funding"), which is an Iowa limited liability company with Berkshire Hathaway Energy Company ("BHE") as its sole member. BHE is a holding company based in Des Moines, Iowa that owns subsidiaries principally engaged in energy businesses. BHE is a consolidated subsidiary of Berkshire Hathaway Inc. ("Berkshire Hathaway").
MidAmerican Funding, LLC and Subsidiaries [Member]
Segment Reporting Information [Line Items]
Organization and Operations	MidAmerican Funding, LLC ("MidAmerican Funding") is an Iowa limited liability company with Berkshire Hathaway Energy Company ("BHE") as its sole member. BHE is a holding company based in Des Moines, Iowa that owns subsidiaries principally engaged in energy businesses. BHE is a consolidated subsidiary of Berkshire Hathaway Inc. ("Berkshire Hathaway"). MidAmerican Funding's direct wholly owned subsidiary is MHC Inc. ("MHC"), which constitutes substantially all of MidAmerican Funding's assets, liabilities and business activities except those related to MidAmerican Funding's long-term debt securities. MHC conducts no business other than the ownership of its subsidiaries and related corporate services. MHC's principal subsidiary is MidAmerican Energy Company ("MidAmerican Energy"), a public utility with electric and natural gas operations, and its direct, wholly owned nonregulated subsidiary is Midwest Capital Group, Inc. ("Midwest Capital Group").
Nevada Power Company [Member]
Segment Reporting Information [Line Items]
Organization and Operations	Organization and Operations Nevada Power Company and its subsidiaries, together with its subsidiaries ("Nevada Power"), is a wholly owned subsidiary of NV Energy, Inc. ("NV Energy"), a holding company that also owns Sierra Pacific Power Company ("Sierra Pacific") and certain other subsidiaries. Nevada Power is a United States regulated electric utility company serving retail customers, including residential, commercial and industrial customers primarily in Las Vegas, North Las Vegas, Henderson and adjoining areas. NV Energy is an indirect wholly owned subsidiary of Berkshire Hathaway Energy Company ("BHE"). BHE is a holding company based in Des Moines, Iowa that owns subsidiaries principally engaged in energy businesses. BHE is a consolidated subsidiary of Berkshire Hathaway Inc. ("Berkshire Hathaway").
Sierra Pacific Power Company [Member]
Segment Reporting Information [Line Items]
Organization and Operations	Organization and OperationsSierra Pacific Power Company ("Sierra Pacific") is a wholly owned subsidiary of NV Energy, Inc. ("NV Energy"), a holding company that also owns Nevada Power Company and its subsidiaries ("Nevada Power") and certain other subsidiaries. Sierra Pacific is a United States regulated electric utility company serving retail customers, including residential, commercial and industrial customers and regulated retail natural gas customers primarily in northern Nevada. NV Energy is an indirect wholly owned subsidiary of Berkshire Hathaway Energy Company ("BHE"). BHE is a holding company based in Des Moines, Iowa that owns subsidiaries principally engaged in energy businesses. BHE is a consolidated subsidiary of Berkshire Hathaway Inc. ("Berkshire Hathaway").
Eastern Energy Gas Holdings, LLC [Member]
Segment Reporting Information [Line Items]
Organization and Operations	Organization and OperationsEastern Energy Gas Holdings, LLC and its subsidiaries ("Eastern Energy Gas") is a holding company that conducts business activities consisting of Federal Energy Regulatory Commission ("FERC")-regulated interstate natural gas transportation pipeline and underground storage operations in the eastern region of the United States and operates Cove Point LNG, LP ("Cove Point"), a liquefied natural gas ("LNG") export, import and storage facility. Eastern Energy Gas owns 100% of the general partner interest and 25% of the limited partnership interest in Cove Point. In addition, Eastern Energy Gas owns a 50% noncontrolling interest in Iroquois Gas Transmission System, L.P. ("Iroquois"), a 416-mile FERC-regulated interstate natural gas transportation pipeline. On November 1, 2020, Berkshire Hathaway Energy Company ("BHE") completed its acquisition of substantially all of the natural gas transmission and storage business of Dominion Energy, Inc. ("DEI") and Dominion Energy Questar Corporation ("Dominion Questar"), exclusive of Dominion Energy Questar Pipeline, LLC and related entities (the "Questar Pipeline Group") (the "GT&S Transaction"). As a result of the GT&S Transaction, Eastern Energy Gas became an indirect wholly owned subsidiary of BHE. BHE is a holding company based in Des Moines, Iowa that owns subsidiaries principally engaged in energy businesses. BHE is a consolidated subsidiary of Berkshire Hathaway Inc. ("Berkshire Hathaway"). See Note 3 for more information regarding the GT&S Transaction.

Summary of Significant Accounti

Summary of Significant Accounting Policies (Notes)	12 Months Ended
	Dec. 31, 2020
Allowance for Doubtful Accounts [Line Items]
Summary of Significant Accounting Policies [Text Block]	Summary of Significant Accounting Policies Basis of Consolidation and Presentation The Consolidated Financial Statements include the accounts of BHE and its subsidiaries in which it holds a controlling financial interest as of the financial statement date. The Consolidated Statements of Operations include the revenue and expenses of any acquired entities from the date of acquisition. The Company consolidates variable interest entities ("VIE") in which it possesses both (i) the power to direct the activities that most significantly impact the entity's economic performance and (ii) the obligation to absorb losses or receive benefits from the entity that could potentially be significant to the VIE. Intercompany accounts and transactions have been eliminated. Use of Estimates in Preparation of Financial Statements The preparation of the Consolidated Financial Statements in conformity with accounting principles generally accepted in the United States of America ("GAAP") requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the period. These estimates include, but are not limited to, the effects of regulation; impairment of goodwill; recovery of long-lived assets; certain assumptions made in accounting for pension and other postretirement benefits; asset retirement obligations ("AROs"); income taxes; unbilled revenue; fair value of assets acquired and liabilities assumed in business combinations; valuation of certain financial assets and liabilities, including derivative contracts; and accounting for contingencies. Actual results may differ from the estimates used in preparing the Consolidated Financial Statements. Accounting for the Effects of Certain Types of Regulation PacifiCorp, MidAmerican Energy, Nevada Power, Sierra Pacific, BHE GT&S, Northern Natural Gas, Kern River and AltaLink (the "Regulated Businesses") prepare their financial statements in accordance with authoritative guidance for regulated operations, which recognizes the economic effects of regulation. Accordingly, the Regulated Businesses defer the recognition of certain costs or income if it is probable that, through the ratemaking process, there will be a corresponding increase or decrease in future regulated rates. Regulatory assets and liabilities are established to reflect the impacts of these deferrals, which will be recognized in earnings in the periods the corresponding changes in regulated rates occur. The Company continually evaluates the applicability of the guidance for regulated operations and whether its regulatory assets and liabilities are probable of inclusion in future regulated rates by considering factors such as a change in the regulator's approach to setting rates from cost-based ratemaking to another form of regulation, other regulatory actions or the impact of competition that could limit the Regulated Businesses' ability to recover their costs. The Company believes the application of the guidance for regulated operations is appropriate and its existing regulatory assets and liabilities are probable of inclusion in future regulated rates. The evaluation reflects the current political and regulatory climate at the federal, state and provincial levels. If it becomes no longer probable that the deferred costs or income will be included in future regulated rates, the related regulatory assets and liabilities will be recognized in net income, returned to customers or re-established as accumulated other comprehensive income (loss) ("AOCI"). Fair Value Measurements As defined under GAAP, fair value is the price that would be received to sell an asset or paid to transfer a liability between market participants in the principal market or in the most advantageous market when no principal market exists. Adjustments to transaction prices or quoted market prices may be required in illiquid or disorderly markets in order to estimate fair value. Alternative valuation techniques may be appropriate under the circumstances to determine the value that would be received to sell an asset or paid to transfer a liability in an orderly transaction. Market participants are assumed to be independent, knowledgeable, able and willing to transact an exchange and not under duress. Nonperformance or credit risk is considered in determining fair value. Considerable judgment may be required in interpreting market data used to develop the estimates of fair value. Accordingly, estimates of fair value presented herein are not necessarily indicative of the amounts that could be realized in a current or future market exchange. Cash Equivalents and Restricted Cash and Cash Equivalents and Investments Cash equivalents consist of funds invested in money market mutual funds, United States Treasury Bills and other investments with a maturity of three months or less when purchased. Cash and cash equivalents exclude amounts where availability is restricted by legal requirements, loan agreements or other contractual provisions. Restricted cash and cash equivalents consist substantially of funds restricted for the purpose of constructing solid waste facilities under tax-exempt bond obligation agreements and debt service obligations for certain of the Company's nonregulated renewable energy projects. Restricted amounts are included in restricted cash and cash equivalents and investments and restricted cash and cash equivalents and investments on the Consolidated Balance Sheets. Investments Fixed Maturity Securities The Company's management determines the appropriate classification of investments in fixed maturity securities at the acquisition date and reevaluates the classification at each balance sheet date. Investments and restricted cash and cash equivalents and investments that management does not intend to use or is restricted from using in current operations are presented as noncurrent on the Consolidated Balance Sheets. Available-for-sale investments are carried at fair value with realized gains and losses, as determined on a specific identification basis, recognized in earnings and unrealized gains and losses recognized in AOCI, net of tax. Realized and unrealized gains and losses on fixed maturity securities in a trust related to the decommissioning of nuclear generation assets are recorded as a net regulatory liability since the Company expects to recover costs for these activities through regulated rates. Trading investments are carried at fair value with changes in fair value recognized in earnings. Held-to-maturity investments are carried at amortized cost, reflecting the ability and intent to hold the securities to maturity. The difference between the original cost and maturity value of a fixed maturity security is amortized to earnings using the interest method. Investment gains and losses arise when investments are sold (as determined on a specific identification basis) or are other-than-temporarily impaired with respect to securities classified as available-for-sale. If the value of a fixed maturity investment declines to below amortized cost and the decline is deemed other than temporary, the amortized cost of the investment is reduced to fair value, with a corresponding charge to earnings. Any resulting impairment loss is recognized in earnings if the Company intends to sell, or expects to be required to sell, the debt security before its amortized cost is recovered. If the Company does not expect to ultimately recover the amortized cost basis even if it does not intend to sell the security, the credit loss component is recognized in earnings and any difference between fair value and the amortized cost basis, net of the credit loss, is reflected in other comprehensive income (loss) ("OCI"). For regulated fixed maturity investments, any impairment charge is offset by the establishment of a regulatory asset to the extent recovery in regulated rates is probable. Equity Securities Investments in equity securities are carried at fair value with changes in fair value recognized in earnings as a component of gains (losses) on marketable securities, net. Prior to January 1, 2018, substantially all of the Company's equity security investments were classified as available-for-sale with changes in fair value recognized in OCI, net of income taxes. All changes in fair value of equity securities in a trust related to the decommissioning of nuclear generation assets are recorded as a net regulatory liability since the Company expects to recover costs for these activities through regulated rates. Equity Method Investments The Company utilizes the equity method of accounting with respect to investments when it possesses the ability to exercise significant influence, but not control, over the operating and financial policies of the investee. The ability to exercise significant influence is presumed when the investor possesses more than 20% of the voting interests of the investee. This presumption may be overcome based on specific facts and circumstances that demonstrate the ability to exercise significant influence is restricted. In applying the equity method, the Company records the investment at cost and subsequently increases or decreases the carrying value of the investment by the Company's share of the net earnings or losses and OCI of the investee. The Company records dividends or other equity distributions as reductions in the carrying value of the investment. Certain equity investments are presented on the Consolidated Balance Sheets net of related investment tax credits. Allowance for Credit Losses Trade receivables are primarily short-term in nature with stated collection terms of less than one year from the date of origination and are stated at the outstanding principal amount, net of an estimated allowance for credit losses. The allowance for credit losses is based on the Company's assessment of the collectability of amounts owed to the Company by its customers. This assessment requires judgment regarding the ability of customers to pay or the outcome of any pending disputes. In measuring the allowance for credit losses for trade receivables, the Company primarily utilizes credit loss history. However, the Company may adjust the allowance for credit losses to reflect current conditions and reasonable and supportable forecasts that deviate from historical experience. As of December 31, 2020 and 2019, the allowance for credit losses totaled $77 million and $44 million, respectively, and is included in trade receivables, net on the Consolidated Balance Sheets. Derivatives The Company employs a number of different derivative contracts, which may include forwards, futures, options, swaps and other agreements, to manage its commodity price, interest rate, and foreign currency exchange rate risk. Derivative contracts are recorded on the Consolidated Balance Sheets as either assets or liabilities and are stated at estimated fair value unless they are designated as normal purchases or normal sales and qualify for the exception afforded by GAAP. Derivative balances reflect offsetting permitted under master netting agreements with counterparties and cash collateral paid or received under such agreements. Cash collateral received from or paid to counterparties to secure derivative contract assets or liabilities in excess of amounts offset is included in other current assets on the Consolidated Balance Sheets. Commodity derivatives used in normal business operations that are settled by physical delivery, among other criteria, are eligible for and may be designated as normal purchases or normal sales. Normal purchases or normal sales contracts are not marked-to-market and settled amounts are recognized as operating revenue or cost of sales on the Consolidated Statements of Operations. For the Company's derivatives not designated as hedging contracts, the settled amount is generally included in regulated rates. Accordingly, the net unrealized gains and losses associated with interim price movements on contracts that are accounted for as derivatives and probable of inclusion in regulated rates are recorded as regulatory assets and liabilities. For the Company's derivatives not designated as hedging contracts and for which changes in fair value are not recorded as regulatory assets and liabilities, unrealized gains and losses are recognized on the Consolidated Statements of Operations as operating revenue for sales contracts; cost of sales and operating expense for purchase contracts and electricity, natural gas and fuel swap contracts; and other, net for interest rate swap derivatives. For the Company's derivatives designated as hedging contracts, the Company formally assesses, at inception and thereafter, whether the hedging contract is highly effective in offsetting changes in the hedged item. The Company formally documents hedging activity by transaction type and risk management strategy. Changes in the estimated fair value of a derivative contract designated and qualified as a cash flow hedge, to the extent effective, are included on the Consolidated Statements of Changes in Equity as AOCI, net of tax, until the contract settles and the hedged item is recognized in earnings. The Company discontinues hedge accounting prospectively when it has determined that a derivative contract no longer qualifies as an effective hedge, or when it is no longer probable that the hedged forecasted transaction will occur. When hedge accounting is discontinued because the derivative contract no longer qualifies as an effective hedge, future changes in the estimated fair value of the derivative contract are charged to earnings. Gains and losses related to discontinued hedges that were previously recorded in AOCI will remain in AOCI until the contract settles and the hedged item is recognized in earnings, unless it becomes probable that the hedged forecasted transaction will not occur at which time associated deferred amounts in AOCI are immediately recognized in earnings. Inventories Inventories consist mainly of fuel, which includes coal stocks, stored gas and fuel oil, totaling $382 million and $257 million as of December 31, 2020 and 2019, respectively, and materials and supplies totaling $786 million and $616 million as of December 31, 2020 and 2019, respectively. The cost of materials and supplies, coal stocks and fuel oil is determined primarily using the average cost method. The cost of stored gas is determined using either the last-in-first-out ("LIFO") method or the lower of average cost or market. With respect to inventories carried at LIFO cost, the replacement cost would be $10 million higher and $2 million lower as of December 31, 2020 and 2019, respectively. Property, Plant and Equipment, Net General Additions to property, plant and equipment are recorded at cost. The Company capitalizes all construction-related materials, direct labor and contract services, as well as indirect construction costs. Indirect construction costs include capitalized interest, including debt allowance for funds used during construction ("AFUDC"), and equity AFUDC, as applicable to the Regulated Businesses. The cost of additions and betterments are capitalized, while costs incurred that do not improve or extend the useful lives of the related assets are generally expensed. Additionally, MidAmerican Energy has regulatory arrangements in Iowa in which the carrying cost of certain utility plant has been reduced for amounts associated with electric returns on equity exceeding specified thresholds. Depreciation and amortization are generally computed by applying the composite or straight-line method based on either estimated useful lives or mandated recovery periods as prescribed by the Company's various regulatory authorities. Depreciation studies are completed by the Regulated Businesses to determine the appropriate group lives, net salvage and group depreciation rates. These studies are reviewed and rates are ultimately approved by the applicable regulatory commission. Net salvage includes the estimated future residual values of the assets and any estimated removal costs recovered through approved depreciation rates. Estimated removal costs are recorded as either a cost of removal regulatory liability or an ARO liability on the Consolidated Balance Sheets, depending on whether the obligation meets the requirements of an ARO. As actual removal costs are incurred, the associated liability is reduced. Generally when the Company retires or sells a component of regulated property, plant and equipment, it charges the original cost, net of any proceeds from the disposition, to accumulated depreciation. Any gain or loss on disposals of all other assets is recorded through earnings. Debt and equity AFUDC, which represent the estimated costs of debt and equity funds necessary to finance the construction of regulated facilities, is capitalized by the Regulated Businesses as a component of property, plant and equipment, with offsetting credits to the Consolidated Statements of Operations. AFUDC is computed based on guidelines set forth by the Federal Energy Regulatory Commission ("FERC") and the Alberta Utilities Commission ("AUC"). After construction is completed, the Company is permitted to earn a return on these costs as a component of the related assets, as well as recover these costs through depreciation expense over the useful lives of the related assets. Asset Retirement Obligations The Company recognizes AROs when it has a legal obligation to perform decommissioning, reclamation or removal activities upon retirement of an asset. The Company's AROs are primarily related to the decommissioning of nuclear generating facilities and obligations associated with its other generating facilities and offshore natural gas pipelines. The fair value of an ARO liability is recognized in the period in which it is incurred, if a reasonable estimate of fair value can be made, and is added to the carrying amount of the associated asset, which is then depreciated over the remaining useful life of the asset. Subsequent to the initial recognition, the ARO liability is adjusted for any revisions to the original estimate of undiscounted cash flows (with corresponding adjustments to property, plant and equipment, net) and for accretion of the ARO liability due to the passage of time. For the Regulated Businesses, the difference between the ARO liability, the corresponding ARO asset included in property, plant and equipment, net and amounts recovered in rates to satisfy such liabilities is recorded as a regulatory asset or liability. Impairment The Company evaluates long-lived assets for impairment, including property, plant and equipment, when events or changes in circumstances indicate that the carrying value of such assets may not be recoverable or the assets are being held for sale. Upon the occurrence of a triggering event, the asset is reviewed to assess whether the estimated undiscounted cash flows expected from the use of the asset plus the residual value from the ultimate disposal exceeds the carrying value of the asset. If the carrying value exceeds the estimated recoverable amounts, the asset is written down to the estimated fair value and any resulting impairment loss is reflected on the Consolidated Statements of Operations. The impacts of regulation are considered when evaluating the carrying value of regulated assets. Leases The Company has non-cancelable operating leases primarily for office space, office equipment, generating facilities, land and rail cars and finance leases consisting primarily of transmission assets, generating facilities and vehicles. These leases generally require the Company to pay for insurance, taxes and maintenance applicable to the leased property. Given the capital intensive nature of the utility industry, it is common for a portion of lease costs to be capitalized when used during construction or maintenance of assets, in which the associated costs will be capitalized with the corresponding asset and depreciated over the remaining life of that asset. Certain leases contain renewal options for varying periods and escalation clauses for adjusting rent to reflect changes in price indices. The Company does not include options in its lease calculations unless there is a triggering event indicating the Company is reasonably certain to exercise the option. The Company's accounting policy is to not recognize right-of-use assets and lease obligations for leases with contract terms of one year or less and not separate lease components from non-lease components and instead account for each separate lease component and the non-lease components associated with a lease as a single lease component. Leases will be evaluated for impairment in line with Accounting Standards Codification ("ASC") 360, "Property, Plant and Equipment" when a triggering event has occurred that might affect the value and use of the assets being leased. The Company's leases of generating facilities generally are for the long-term purchase of electric energy, also known as power purchase agreements ("PPA"). PPAs are generally signed before or during the early stages of project construction and can yield a lease that has not yet commenced. These agreements are primarily for renewable energy and the payments are considered variable lease payments as they are based on the amount of output. The Company's operating and finance right-of-use assets are recorded in other assets and the operating and finance lease liabilities are recorded in current and long-term other liabilities accordingly. Goodwill Goodwill represents the excess of the purchase price over the fair value of identifiable net assets acquired in business combinations. The Company evaluates goodwill for impairment at least annually and completed its annual review as of October 31. When evaluating goodwill for impairment, the Company estimates the fair value of its reporting units. If the carrying amount of a reporting unit, including goodwill, exceeds the estimated fair value, then the excess is charged to earnings as an impairment loss. Significant judgment is required in estimating the fair value of the reporting unit and performing goodwill impairment tests. The Company uses a variety of methods to estimate a reporting unit's fair value, principally discounted projected future net cash flows. Key assumptions used include, but are not limited to, the use of estimated future cash flows; multiples of earnings or rate base; and an appropriate discount rate. In estimating future cash flows, the Company incorporates current market information, as well as historical factors. As such, the determination of fair value incorporates significant unobservable inputs. During 2020, 2019 and 2018, the Company did not record any material goodwill impairments. The Company records goodwill adjustments for (a) the tax benefit associated with the excess of tax-deductible goodwill over the reported amount of goodwill and (b) changes to the purchase price allocation prior to the end of the measurement period, which is not to exceed one year from the acquisition date. Revenue Recognition Customer Revenue The Company uses a single five-step model to identify and recognize revenue from contracts with customers ("Customer Revenue") upon transfer of control of promised goods or services in an amount that reflects the consideration to which the Company expects to be entitled in exchange for those goods or services. The Company records sales, franchise and excise taxes collected directly from customers and remitted directly to the taxing authorities on a net basis on the Consolidated Statements of Operations. In the event one of the parties to a contract has performed before the other, the Company would recognize a contract asset or contract liability depending on the relationship between the Company's performance and the customer's payment. Energy Products and Services A majority of the Company's energy revenue is derived from tariff-based sales arrangements approved by various regulatory commissions. These tariff-based revenues are mainly comprised of energy, transmission, distribution and natural gas and have performance obligations to deliver energy products and services to customers which are satisfied over time as energy is delivered or services are provided. The Company's energy revenue that is nonregulated primarily relates to the Company's renewable energy business. Revenue recognized is equal to what the Company has the right to invoice as it corresponds directly with the value to the customer of the Company's performance to date and includes billed and unbilled amounts. As of December 31, 2020 and 2019, trade receivables, net on the Consolidated Balance Sheets relate substantially to Customer Revenue, including unbilled revenue of $750 million and $638 million, respectively. Payments for amounts billed are generally due from the customer within 30 days of billing. Rates charged for energy products and services are established by regulators or contractual arrangements that establish the transaction price as well as the allocation of price amongst the separate performance obligations. When preliminary regulated rates are permitted to be billed prior to final approval by the applicable regulator, certain revenue collected may be subject to refund and a liability for estimated refunds is accrued. Real Estate Services The Company's HomeServices reportable segment consists of separate brokerage, mortgage and franchise businesses. Rates charged for brokerage, mortgage and franchise real estate services are established through contractual arrangements that establish the transaction price and the allocation of the price amongst the separate performance obligations. The full-service residential real estate brokerage business has performance obligations to deliver integrated real estate services including brokerage services, title and closing services, property and casualty insurance, home warranties, relocation services, and other home-related services to customers. All performance obligations related to the full-service residential real estate brokerage business are satisfied in less than one year at the point in time when a real estate transaction is closed or when services are provided. Commission revenue from real estate brokerage transactions and related amounts due to agents are recognized when a real estate transaction is closed. Title and escrow closing fee revenue from real estate transactions and related amounts due to the title insurer are recognized at closing. Payments for amounts billed are generally due from the customer at closing. The franchise business operates a network that has performance obligations to provide the right to use certain brand names and other related service marks as well as to provide orientation programs, training and consultation services, advertising programs and other services to its franchisees. The performance obligations related to the franchise business are satisfied over time or when the services are provided. Franchise royalty fees are sales-based variable consideration and are based on a percentage of commissions earned by franchisees on real estate sales, which are recognized when the sale closes. Meetings and training revenue, referral fees, late fees, service fees and franchise termination fees are earned when services have been completed. Payments for amounts billed are generally due from the franchisee within 30 days of billing. Other Revenue Energy Products and Services Other revenue consists primarily of revenue related to power purchase agreements not considered Customer Revenue as they are recognized in accordance with ASC 815, "Derivatives and Hedging" and ASC 842, "Leases" and certain non-tariff-based revenue approved by the regulator that is not considered Customer Revenue within ASC 606, "Revenue from Contracts with Customers." Real Estate Service Mortgage and other revenue consists primarily of revenue related to the mortgage business. Mortgage fee revenue consists of amounts earned related to application and underwriting fees, and fees on canceled loans. Fees associated with the origination of mortgage loans are recognized as earned. These amounts are not considered Customer Revenue as they are recognized in accordance with ASC 815, "Derivatives and Hedging," ASC 825, "Financial Instruments" and ASC 860, "Transfers and Servicing." Unamortized Debt Premiums, Discounts and Debt Issuance Costs Premiums, discounts and debt issuance costs incurred for the issuance of long-term debt are amortized over the term of the related financing using the effective interest method. Foreign Currency The accounts of foreign-based subsidiaries are measured in most instances using the local currency of the subsidiary as the functional currency. Revenue and expenses of these businesses are translated into United States dollars at the average exchange rate for the period. Assets and liabilities are translated at the exchange rate as of the end of the reporting period. Gains or losses from translating the financial statements of foreign-based operations are included in equity as a component of AOCI. Gains or losses arising from transactions denominated in a currency other than the functional currency of the entity that is party to the transaction are included in earnings. Income Taxes The Company's provision for income taxes has been computed on a stand-alone basis. Berkshire Hathaway includes the Company in its consolidated United States federal and Iowa state income tax returns and the majority of the Company's United States federal income tax is remitted to or received from Berkshire Hathaway. The Company records the deferred income tax assets associated with the state of Iowa net operating loss carryforward as a long-term income tax receivable from Berkshire Hathaway as a component of BHE's shareholders' equity due to the long-term related-party nature of the income tax receivable. Deferred income tax assets and liabilities are based on differences between the financial statement and income tax basis of assets and liabilities using enacted income tax rates expected to be in effect for the year in which the differences are expected to reverse. Changes in deferred income tax assets and liabilities associated with components of OCI are charged or credited directly to OCI. Changes in deferred income tax assets and liabilities associated with income tax benefits and expense for certain property-related basis differences and other various differences that the Company's regulated businesses deems probable to be passed on to their customers are charged or credited directly to a regulatory asset or liability and will be included in regulated rates when the temporary differences reverse. Other changes in deferred income tax assets and liabilities are included as a component of income tax expense. Changes in deferred income tax assets and liabilities attributable to changes in enacted income tax rates are charged or credited to income tax expense or a regulatory asset or liability in the period of enactment. Valuation allowances are established when necessary to reduce deferred income tax assets to the amount that is more-likely-than-not to be realized. Investment tax credits are generally deferred and amortized over the estimated useful lives of the related properties or as prescribed by various regulatory commissions. The Company has not established deferred income taxes on its undistributed foreign earnings that have been determined by management to be reinvested indefinitely; however, the Company periodically evaluates its capital requirements. If circumstances change in the future and a portion of the Company's undistributed foreign earnings were repatriated, the dividends may be subject to taxation in the United States but the tax is not expected to be material.
PacifiCorp [Member]
Allowance for Doubtful Accounts [Line Items]
Summary of Significant Accounting Policies [Text Block]	Summary of Significant Accounting Policies Basis of Consolidation and Presentation The Consolidated Financial Statements include the accounts of PacifiCorp and its subsidiaries in which it holds a controlling financial interest as of the financial statement date. Intercompany accounts and transactions have been eliminated. Use of Estimates in Preparation of Financial Statements The preparation of the Consolidated Financial Statements in conformity with accounting principles generally accepted in the United States of America ("GAAP") requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the period. These estimates include, but are not limited to, the effects of regulation; certain assumptions made in accounting for pension and other postretirement benefits; asset retirement obligations ("AROs"); income taxes; unbilled revenue; valuation of certain financial assets and liabilities, including derivative contracts; and accounting for loss contingencies, including those related to the Oregon and Northern California 2020 wildfires (the "2020 Wildfires") described in Note 14. Actual results may differ from the estimates used in preparing the Consolidated Financial Statements. Accounting for the Effects of Certain Types of Regulation PacifiCorp prepares its financial statements in accordance with authoritative guidance for regulated operations, which recognizes the economic effects of regulation. Accordingly, PacifiCorp defers the recognition of certain costs or income if it is probable that, through the ratemaking process, there will be a corresponding increase or decrease in future rates. Regulatory assets and liabilities are established to reflect the impacts of these deferrals, which will be recognized in earnings in the periods the corresponding changes in rates occur. PacifiCorp continually evaluates the applicability of the guidance for regulated operations and whether its regulatory assets and liabilities are probable of inclusion in future rates by considering factors such as a change in the regulator's approach to setting rates from cost-based ratemaking to another form of regulation, other regulatory actions or the impact of competition that could limit PacifiCorp's ability to recover its costs. PacifiCorp believes the application of the guidance for regulated operations is appropriate and its existing regulatory assets and liabilities are probable of inclusion in future rates. The evaluation reflects the current political and regulatory climate at both the federal and state levels. If it becomes no longer probable that the deferred costs or income will be included in future rates, the related regulatory assets and liabilities will be recognized in net income, returned to customers or re-established as accumulated other comprehensive income (loss) ("AOCI"). Fair Value Measurements As defined under GAAP, fair value is the price that would be received to sell an asset or paid to transfer a liability between market participants in the principal market or in the most advantageous market when no principal market exists. Adjustments to transaction prices or quoted market prices may be required in illiquid or disorderly markets in order to estimate fair value. Different valuation techniques may be appropriate under the circumstances to determine the value that would be received to sell an asset or paid to transfer a liability in an orderly transaction. Market participants are assumed to be independent, knowledgeable, able and willing to transact an exchange and not under duress. Nonperformance or credit risk is considered in determining fair value. Considerable judgment may be required in interpreting market data used to develop the estimates of fair value. Accordingly, estimates of fair value presented herein are not necessarily indicative of the amounts that could be realized in a current or future market exchange. Cash Equivalents and Restricted Cash and Cash Equivalents and Investments Cash equivalents consist of funds invested in money market mutual funds, United States Treasury Bills and other investments with a maturity of three months or less when purchased. Cash and cash equivalents exclude amounts where availability is restricted by legal requirements, loan agreements or other contractual provisions. Restricted cash and cash equivalents consist substantially of funds representing escrow accounts for disputes, vendor retention, custodial and nuclear decommissioning funds. Restricted amounts are included in other current assets and other assets on the Consolidated Balance Sheets. Investments Available-for-sale securities are carried at fair value with realized gains and losses, as determined on a specific identification basis, recognized in earnings and unrealized gains and losses recognized in AOCI, net of tax. As of December 31, 2020 and 2019, PacifiCorp had no unrealized gains and losses on available-for-sale securities. Trading securities are carried at fair value with realized and unrealized gains and losses recognized in earnings. Equity Method Investments PacifiCorp utilizes the equity method of accounting with respect to investments when it possesses the ability to exercise significant influence, but not control, over the operating and financial policies of the investee. The ability to exercise significant influence is presumed when an investor possesses more than 20% of the voting interests of the investee. This presumption may be overcome based on specific facts and circumstances that demonstrate the ability to exercise significant influence is restricted. In applying the equity method, PacifiCorp records the investment at cost and subsequently increases or decreases the carrying value of the investment by PacifiCorp's proportionate share of the net earnings or losses and other comprehensive income (loss) ("OCI") of the investee. PacifiCorp records dividends or other equity distributions as reductions in the carrying value of the investment. Allowance for Credit Losses Trade receivables are primarily short-term in nature with stated collection terms of less than one year from the date of origination, and are stated at the outstanding principal amount, net of an estimated allowance for credit losses. The allowance for credit losses is based on PacifiCorp's assessment of the collectability of amounts owed to PacifiCorp by its customers. This assessment requires judgment regarding the ability of customers to pay or the outcome of any pending disputes. In measuring the allowance for credit losses for trade receivables, PacifiCorp primarily utilizes credit loss history. However, PacifiCorp may adjust the allowance for credit losses to reflect current conditions and reasonable and supportable forecasts that deviate from historical experience. The change in the balance of the allowance for credit losses, which is included in trade receivables, net on the Consolidated Balance Sheets, is summarized as follows for the years ended December 31 (in millions): 2020 2019 2018 Beginning balance $ 8 $ 8 $ 10 Charged to operating costs and expenses, net 18 13 12 Write-offs, net (9) (13) (14) Ending balance $ 17 $ 8 $ 8 Derivatives PacifiCorp employs a number of different derivative contracts, which may include forwards, options, swaps and other agreements, to manage price risk for electricity, natural gas and other commodities and interest rate risk. Derivative contracts are recorded on the Consolidated Balance Sheets as either assets or liabilities and are stated at estimated fair value unless they are designated as normal purchases or normal sales and qualify for the exception afforded by GAAP. Derivative balances reflect offsetting permitted under master netting agreements with counterparties and cash collateral paid or received under such agreements. Commodity derivatives used in normal business operations that are settled by physical delivery, among other criteria, are eligible for and may be designated as normal purchases or normal sales. Normal purchases or normal sales contracts are not marked-to-market and settled amounts are recognized as operating revenue or energy costs on the Consolidated Statements of Operations. For PacifiCorp's derivative contracts, the settled amount is generally included in rates. Accordingly, the net unrealized gains and losses associated with interim price movements on contracts that are accounted for as derivatives and probable of inclusion in rates are recorded as regulatory liabilities or assets. For a derivative contract not probable of inclusion in rates, changes in the fair value are recognized in earnings. Inventories Inventories consist mainly of materials, supplies and fuel stocks and are stated at the lower of average cost or net realizable value. Property, Plant and Equipment, Net General Additions to property, plant and equipment are recorded at cost. PacifiCorp capitalizes all construction-related material, direct labor and contract services, as well as indirect construction costs, which include debt and equity allowance for funds used during construction ("AFUDC"). The cost of additions and betterments are capitalized, while costs incurred that do not improve or extend the useful lives of the related assets are generally expensed. Depreciation and amortization are generally computed on the straight-line method based on composite asset class lives prescribed by PacifiCorp's various regulatory authorities or over the assets' estimated useful lives. Depreciation studies are completed periodically to determine the appropriate composite asset class lives, net salvage and depreciation rates. These studies are reviewed and rates are ultimately approved by the various regulatory authorities. Net salvage includes the estimated future residual values of the assets and any estimated removal costs recovered through approved depreciation rates. Estimated removal costs are recorded as either a cost of removal regulatory liability or an ARO liability on the Consolidated Balance Sheets, depending on whether the obligation meets the requirements of an ARO. As actual removal costs are incurred, the associated liability is reduced. Generally when PacifiCorp retires or sells a component of regulated property, plant and equipment, it charges the original cost, net of any proceeds from the disposition, to accumulated depreciation. Any gain or loss on disposals of all other assets is recorded through earnings. Debt and equity AFUDC, which represents the estimated costs of debt and equity funds necessary to finance the construction of property, plant and equipment, is capitalized as a component of property, plant and equipment, with offsetting credits to the Consolidated Statements of Operations. AFUDC is computed based on guidelines set forth by the Federal Energy Regulatory Commission ("FERC"). After construction is completed, PacifiCorp is permitted to earn a return on these costs as a component of the related assets, as well as recover these costs through depreciation expense over the useful lives of the related assets. Asset Retirement Obligations PacifiCorp recognizes AROs when it has a legal obligation to perform decommissioning, reclamation or removal activities upon retirement of an asset. PacifiCorp's AROs are primarily associated with its generating facilities. The fair value of an ARO liability is recognized in the period in which it is incurred, if a reasonable estimate of fair value can be made, and is added to the carrying amount of the associated asset, which is then depreciated over the remaining useful life of the asset. Subsequent to the initial recognition, the ARO liability is adjusted for any revisions to the original estimate of undiscounted cash flows (with corresponding adjustments to property, plant and equipment, net) and for accretion of the ARO liability due to the passage of time. The difference between the ARO liability, the corresponding ARO asset included in property, plant and equipment, net and amounts recovered in rates to satisfy such liabilities is recorded as a regulatory asset or liability. Impairment PacifiCorp evaluates long-lived assets for impairment, including property, plant and equipment, when events or changes in circumstances indicate that the carrying value of such assets may not be recoverable or the assets are being held for sale. Upon the occurrence of a triggering event, the asset is reviewed to assess whether the estimated undiscounted cash flows expected from the use of the asset plus the residual value from the ultimate disposal exceeds the carrying value of the asset. If the carrying value exceeds the estimated recoverable amounts, the asset is written down to the estimated fair value and any resulting impairment loss is reflected on the Consolidated Statements of Operations. As substantially all property, plant and equipment supports PacifiCorp's regulated businesses the impacts of regulation are considered when evaluating the carrying value of regulated assets. Leases PacifiCorp has non-cancelable operating leases primarily for land, office space, office equipment, and generating facilities and finance leases consisting primarily of office buildings, natural gas pipeline facilities, and generating facilities. These leases generally require PacifiCorp to pay for insurance, taxes and maintenance applicable to the leased property. Given the capital intensive nature of the utility industry, it is common for a portion of lease costs to be capitalized when used during construction or maintenance of assets, in which the associated costs will be capitalized with the corresponding asset and depreciated over the remaining life of that asset. Certain leases contain renewal options for varying periods and escalation clauses for adjusting rent to reflect changes in price indices. PacifiCorp does not include options in its lease calculations unless there is a triggering event indicating PacifiCorp is reasonably certain to exercise the option. PacifiCorp's accounting policy is to not recognize right-of-use assets and lease obligations for leases with contract terms of one year or less and not separate lease components from non-lease components and instead account for each separate lease component and the non-lease components associated with a lease as a single lease component. Right-of-use assets will be evaluated for impairment in line with Accounting Standards Codification ("ASC") 360, "Property, Plant and Equipment" when a triggering event has occurred that might affect the value and use of the assets being leased. PacifiCorp's leases of generating facilities generally are in the form of long-term purchases of electricity, also known as power purchase agreements ("PPA"). PPAs are generally signed before or during the early stages of project construction and can yield a lease that has not yet commenced. These agreements are primarily for renewable energy and the payments are considered variable lease payments as they are based on the amount of output. PacifiCorp's operating and finance right-of-use assets are recorded in other assets and the operating and finance lease liabilities are recorded in current and long-term other liabilities accordingly. Revenue Recognition PacifiCorp uses a single five-step model to identify and recognize revenue from contracts with customers ("Customer Revenue") upon transfer of control of promised goods or services in an amount that reflects the consideration to which PacifiCorp expects to be entitled in exchange for those goods or services. PacifiCorp records sales, franchise and excise taxes collected directly from customers and remitted directly to the taxing authorities on a net basis on the Consolidated Statements of Operations. Substantially all of PacifiCorp's Customer Revenue is derived from tariff-based sales arrangements approved by various regulatory commissions. These tariff-based revenues are mainly comprised of energy, transmission and distribution and have performance obligations to deliver energy products and services to customers which are satisfied over time as energy is delivered or services are provided. Other revenue consists primarily of revenue recognized in accordance with ASC 815, "Derivatives and Hedging." Revenue recognized is equal to what PacifiCorp has the right to invoice as it corresponds directly with the value to the customer of PacifiCorp's performance to date and includes billed and unbilled amounts. As of December 31, 2020 and 2019, trade receivables, net on the Consolidated Balance Sheets relate substantially to Customer Revenue, including unbilled revenue of $254 million and $245 million, respectively. Payments for amounts billed are generally due from the customer within 30 days of billing. Rates charged for energy products and services are established by regulators or contractual arrangements that establish the transaction price as well as the allocation of price amongst the separate performance obligations. When preliminary regulated rates are permitted to be billed prior to final approval by the applicable regulator, certain revenue collected may be subject to refund and a liability for estimated refunds is accrued. Unamortized Debt Premiums, Discounts and Debt Issuance Costs Premiums, discounts and debt issuance costs incurred for the issuance of long-term debt are amortized over the term of the related financing using the effective interest method. Income Taxes Berkshire Hathaway includes PacifiCorp in its consolidated United States federal income tax return. Consistent with established regulatory practice, PacifiCorp's provision for income taxes has been computed on a stand-alone basis. Deferred income tax assets and liabilities are based on differences between the financial statement and income tax basis of assets and liabilities using enacted income tax rates expected to be in effect for the year in which the differences are expected to reverse. Changes in deferred income tax assets and liabilities that are associated with components of OCI are charged or credited directly to OCI. Changes in deferred income tax assets and liabilities that are associated with certain property-related basis differences and other various differences that PacifiCorp deems probable to be passed on to its customers in most state jurisdictions are charged or credited directly to a regulatory asset or liability and will be included in regulated rates when the temporary differences reverse or as otherwise approved by PacifiCorp's various regulatory commissions. Other changes in deferred income tax assets and liabilities are included as a component of income tax expense. Changes in deferred income tax assets and liabilities attributable to changes in enacted income tax rates are charged or credited to income tax expense or a regulatory asset or liability in the period of enactment. Valuation allowances are established when necessary to reduce deferred income tax assets to the amount that is more-likely-than-not to be realized. Investment tax credits are generally deferred and amortized over the estimated useful lives of the related properties or as prescribed by various regulatory commissions. Investment tax credits are included in other long-term liabilities on the Consolidated Balance Sheets and were $12 million and $11 million as of December 31, 2020 and 2019, respectively. In determining PacifiCorp's income taxes, management is required to interpret complex income tax laws and regulations, which includes consideration of regulatory implications imposed by PacifiCorp's various regulatory commissions. PacifiCorp's income tax returns are subject to continuous examinations by federal, state and local income tax authorities that may give rise to different interpretations of these complex laws and regulations. Due to the nature of the examination process, it generally takes years before these examinations are completed and these matters are resolved. PacifiCorp recognizes the tax benefit from an uncertain tax position only if it is more-likely-than-not that the tax position will be sustained on examination by the taxing authorities, based on the technical merits of the position. The tax benefits recognized in the Consolidated Financial Statements from such a position are measured based on the largest benefit that is more-likely-than-not to be realized upon ultimate settlement. Although the ultimate resolution of PacifiCorp's federal, state and local income tax examinations is uncertain, PacifiCorp believes it has made adequate provisions for these income tax positions. The aggregate amount of any additional income tax liabilities that may result from these examinations, if any, is not expected to have a material impact on PacifiCorp's consolidated financial results. PacifiCorp's unrecognized tax benefits are primarily included in other long-term liabilities on the Consolidated Balance Sheets. Estimated interest and penalties, if any, related to uncertain tax positions are included as a component of income tax expense on the Consolidated Statements of Operations. Segment Information PacifiCorp currently has one segment, which includes its regulated electric utility operations.
MidAmerican Energy Company [Member]
Allowance for Doubtful Accounts [Line Items]
Summary of Significant Accounting Policies [Text Block]	Basis of Presentation The Statements of Comprehensive Income have been omitted as net income equals comprehensive income for the years ended December 31, 2020, 2019 and 2018. Use of Estimates in Preparation of Financial Statements The preparation of the Financial Statements in conformity with accounting principles generally accepted in the United States of America ("GAAP") requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the period. These estimates include, but are not limited to, the effects of regulation; certain assumptions made in accounting for pension and other postretirement benefits; asset retirement obligations ("AROs"); income taxes; unbilled revenue; valuation of certain financial assets and liabilities, including derivative contracts; and accounting for contingencies. Actual results may differ from the estimates used in preparing the Financial Statements. A ccounting for the Effects of Certain Types of Regulation MidAmerican Energy's utility operations are subject to the regulation of the Iowa Utilities Board ("IUB"), the Illinois Commerce Commission ("ICC"), the South Dakota Public Utilities Commission, and the Federal Energy Regulatory Commission ("FERC"). MidAmerican Energy's accounting policies and the accompanying Financial Statements conform to GAAP applicable to rate-regulated enterprises and reflect the effects of the ratemaking process. MidAmerican Energy prepares its financial statements in accordance with authoritative guidance for regulated operations, which recognizes the economic effects of regulation. Accordingly, MidAmerican Energy defers the recognition of certain costs or income if it is probable that, through the ratemaking process, there will be a corresponding increase or decrease in future regulated rates. Regulatory assets and liabilities are established to reflect the impacts of these deferrals, which will be recognized in earnings in the periods the corresponding changes in regulated rates occur. MidAmerican Energy continually evaluates the applicability of the guidance for regulated operations and whether its regulatory assets and liabilities are probable of inclusion in future regulated rates by considering factors such as a change in the regulator's approach to setting rates from cost-based ratemaking to another form of regulation, other regulatory actions or the impact of competition, that could limit MidAmerican Energy's ability to recover its costs. MidAmerican Energy believes the application of the guidance for regulated operations is appropriate, and its existing regulatory assets and liabilities are probable of inclusion in future regulated rates. The evaluation reflects the current political and regulatory climate at both the federal and state levels. If it becomes no longer probable that the deferred costs or income will be included in future regulated rates, the related regulatory assets and liabilities will be written off to net income, returned to customers or re-established as accumulated other comprehensive income (loss) ("AOCI"). Fair Value Measurements As defined under GAAP, fair value is the price that would be received to sell an asset or paid to transfer a liability between market participants in the principal market or in the most advantageous market when no principal market exists. Adjustments to transaction prices or quoted market prices may be required in illiquid or disorderly markets in order to estimate fair value. Different valuation techniques may be appropriate under the circumstances to determine the value that would be received to sell an asset or paid to transfer a liability in an orderly transaction. Market participants are assumed to be independent, knowledgeable, able and willing to transact an exchange and not under duress. Nonperformance or credit risk is considered in determining fair value. Considerable judgment may be required in interpreting market data used to develop the estimates of fair value. Accordingly, estimates of fair value presented herein are not necessarily indicative of the amounts that could be realized in a current or future market exchange. Cash Equivalents and Restricted Cash and Cash Equivalents and Investments Cash equivalents consist of funds invested in money market mutual funds, United States Treasury Bills and other investments with a maturity of three months or less when purchased. Cash and cash equivalents exclude amounts where availability is restricted by legal requirements, loan agreements or other contractual provisions. Restricted amounts are included in other current assets and investments and restricted investments on the Balance Sheets. Investments Fixed Maturity Securities MidAmerican Energy's management determines the appropriate classification of investments in fixed maturity securities at the acquisition date and reevaluates the classification at each balance sheet date. Investments that management does not intend to use or is restricted from using in current operations are presented as noncurrent on the Balance Sheets. Available-for-sale investments are carried at fair value with realized gains and losses, as determined on a specific identification basis, recognized in earnings and unrealized gains and losses recognized in AOCI, net of tax. Realized and unrealized gains and losses on fixed maturity securities in a trust related to the decommissioning of the Quad Cities Generating Station Units 1 and 2 ("Quad Cities Station") are recorded as a net regulatory liability because MidAmerican Energy expects to refund to customers any decommissioning funds in excess of costs for these activities through regulated rates. Trading investments are carried at fair value with changes in fair value recognized in earnings. Held-to-maturity securities are carried at amortized cost, reflecting the ability and intent to hold the securities to maturity. The difference between the original cost and maturity value of a fixed maturity security is amortized to earnings using the interest method. Investments gains and losses arise when investments are sold (as determined on a specific identification basis) or are other-than-temporarily impaired with respect to securities classified as available-for-sale. If the value of a fixed maturity investment declines to below amortized cost and the decline is deemed other than temporary, the amortized cost of the investment is reduced to fair value, with a corresponding charge to earnings. Any resulting impairment loss is recognized in earnings if MidAmerican Energy intends to sell, or expects to be required to sell, the debt security before its amortized cost is recovered. If MidAmerican Energy does not expect to ultimately recover the amortized cost basis even if it does not intend to sell the security, the credit loss component is recognized in earnings and any difference between fair value and the amortized cost basis, net of the credit loss, is reflected in other comprehensive income (loss) ("OCI"). For regulated investments, any impairment charge is offset by the establishment of a regulatory asset to the extent recovery in regulated rates is probable. Equity Securities All changes in fair value of equity securities in a trust related to the decommissioning of nuclear generation assets are recorded as a net regulatory liability since MidAmerican Energy expects to refund to customers any decommissioning funds in excess of costs for these activities through regulated rates. Allowance for Credit Losses Trade receivables are primarily short-term in nature with stated collection terms of less than one year from the date of origination and are stated at the outstanding principal amount, net of an estimated allowance for credit losses. The allowance for credit losses is based on MidAmerican Energy's assessment of the collectability of amounts owed to it by its customers. This assessment requires judgment regarding the ability of customers to pay or the outcome of any pending disputes. In measuring the allowance for credit losses for trade receivables, MidAmerican Energy primarily utilizes credit loss history. However, it may adjust the allowance for credit losses to reflect current conditions and reasonable and supportable forecasts that deviate from historical experience. As of December 31, 2020 and 2019, the allowance for credit losses totaled $12 million and $5 million, respectively, and is included in trade receivables, net on the Balance Sheets. Derivatives MidAmerican Energy employs a number of different derivative contracts, including forwards, futures, options, swaps and other agreements, to manage price risk for electricity, natural gas and other commodities, and interest rate risk. Derivative contracts are recorded on the Balance Sheets as either assets or liabilities and are stated at estimated fair value unless they are designated as normal purchases or normal sales and qualify for the exception afforded by GAAP. Derivative balances reflect offsetting permitted under master netting agreements with counterparties and cash collateral paid or received under such agreements. Cash collateral received from or paid to counterparties to secure derivative contract assets or liabilities in excess of amounts offset is included in other current assets on the Balance Sheets. Commodity derivatives used in normal business operations that are settled by physical delivery, among other criteria, are eligible for and may be designated as normal purchases or normal sales. Normal purchases or normal sales contracts are not marked to market, and settled amounts are recognized as operating revenue or cost of sales on the Statements of Operations. For MidAmerican Energy's derivatives not designated as hedging contracts, the settled amount is generally included in regulated rates. Accordingly, the net unrealized gains and losses associated with interim price movements on contracts that are accounted for as derivatives and probable of inclusion in regulated rates are recorded as regulatory assets and liabilities. Inventories Inventories consist mainly of materials and supplies, totaling $129 million and $128 million as of December 31, 2020 and 2019, respectively, coal stocks, totaling $119 million and $66 million as of December 31, 2020 and 2019, respectively, and natural gas in storage, totaling $26 million and $28 million as of December 31, 2020 and 2019, respectively. The cost of materials and supplies, coal stocks and fuel oil is determined using the average cost method. The cost of stored natural gas is determined using the last-in-first-out method. With respect to stored natural gas, the replacement cost would be $10 million higher and $2 million lower as of December 31, 2020 and 2019, respectively. Property, Plant and Equipment, Net General Additions to utility plant are recorded at cost. MidAmerican Energy capitalizes all construction-related material, direct labor and contract services, as well as indirect construction costs. Indirect construction costs include debt allowance for funds used during construction ("AFUDC") and equity AFUDC. The cost of additions and betterments are capitalized, while costs incurred that do not improve or extend the useful lives of the related assets are generally expensed. Additionally, MidAmerican Energy has regulatory arrangements in Iowa in which the carrying cost of certain utility plant has been reduced for amounts associated with electric returns on equity exceeding specified thresholds and retail energy benefits associated with certain wind-powered generation. Amounts expensed under these arrangements are included as a component of depreciation and amortization. Depreciation and amortization for MidAmerican Energy's utility operations are computed by applying the composite or straight-line method based on either estimated useful lives or mandated recovery periods as prescribed by its various regulatory authorities. Depreciation studies are completed by MidAmerican Energy to determine the appropriate group lives, net salvage and group depreciation rates. These studies are reviewed and rates are ultimately approved by the applicable regulatory commission. Net salvage includes the estimated future residual values of the assets and any estimated removal costs recovered through approved depreciation rates. Estimated removal costs are recorded as either a cost of removal regulatory liability or an ARO liability on the Balance Sheets, depending on whether the obligation meets the requirements of an ARO. As actual removal costs are incurred, the associated liability is reduced. Generally, when MidAmerican Energy retires or sells a component of utility plant, it charges the original cost, net of any proceeds from the disposition to accumulated depreciation. Any gain or loss on disposals of nonregulated assets is recorded through earnings. Debt and equity AFUDC, which represent the estimated costs of debt and equity funds necessary to finance the construction of its regulated facilities, is capitalized by MidAmerican Energy as a component of utility plant, with offsetting credits to the Statements of Operations. AFUDC is computed based on guidelines set forth by the FERC. After construction is completed, MidAmerican Energy is permitted to earn a return on these costs as a component of the related assets, as well as recover these costs through depreciation expense over the useful lives of the related assets. Asset Retirement Obligations MidAmerican Energy recognizes AROs when it has a legal obligation to perform decommissioning or removal activities upon retirement of an asset. MidAmerican Energy's AROs are primarily related to decommissioning of the Quad Cities Station and obligations associated with its other generating facilities. The fair value of an ARO liability is recognized in the period in which it is incurred, if a reasonable estimate of fair value can be made, and is added to the carrying amount of the associated asset, which is then depreciated over the remaining useful life of the asset. Subsequent to the initial recognition, the ARO liability is adjusted for any revisions to the original estimate of undiscounted cash flows (with corresponding adjustments to utility plant) and for accretion of the ARO liability due to the passage of time. The difference between the ARO liability, the corresponding ARO asset included in utility plant, net and amounts recovered in rates to satisfy such liabilities is recorded as a regulatory asset or liability. Impairment MidAmerican Energy evaluates long-lived assets for impairment, including utility plant, when events or changes in circumstances indicate that the carrying value of such assets may not be recoverable or the assets are being held for sale. Upon the occurrence of a triggering event, the asset is reviewed to assess whether the estimated undiscounted cash flows expected from the use of the asset plus the residual value from the ultimate disposal exceeds the carrying value of the asset. If the carrying value exceeds the estimated recoverable amounts, the asset is written down to the estimated fair value. The impacts of regulation are considered when evaluating the carrying value of regulated assets. For all other assets, any resulting impairment loss is reflected on the Statements of Operations. Revenue Recognition MidAmerican Energy uses a single five-step model to identify and recognize revenue from contracts with customers ("Customer Revenue") upon transfer of control of promised goods or services in an amount that reflects the consideration to which MidAmerican Energy expects to be entitled in exchange for those goods and services. MidAmerican Energy records sales, franchise and excise taxes collected directly from customers and remitted directly to the taxing authorities on a net basis on the Statements of Operations. A majority of MidAmerican Energy's energy revenue is derived from tariff-based sales arrangements approved by various regulatory commissions. These tariff-based revenues are mainly comprised of energy, transmission, distribution and natural gas and have performance obligations to deliver energy products and services to customers which are satisfied over time as energy is delivered or services are provided. Revenue from electric and natural gas customers is recognized as electricity or natural gas is delivered or services are provided. Revenue recognized includes billed and unbilled amounts. As of December 31, 2020 and 2019, unbilled revenue was $95 million and $91 million, respectively, and is included in trade receivables, net on the Balance Sheets. The determination of customer billings is based on a systematic reading of customer meters and applicable rates. At the end of each month, amounts of energy provided to customers since the date of the last meter reading are estimated, and the corresponding unbilled revenue is recorded. Factors that can impact the estimate of unbilled energy include, but are not limited to, seasonal weather patterns, total volumes supplied to the system, line losses and composition of customer classes. Unbilled revenue is reversed in the following month and billed revenue is recorded based on the subsequent meter readings. All of MidAmerican Energy's regulated retail electric and natural gas sales are subject to energy adjustment clauses. MidAmerican Energy also has costs that are recovered, at least in part, through bill riders, including demand-side management and certain transmission costs. The clauses and riders allow MidAmerican Energy to adjust the amounts charged for electric and natural gas service as the related costs change. The costs recovered in revenue through use of the adjustment clauses and bill riders are charged to expense in the same year the related revenue is recognized. At any given time, these costs may be over or under collected from customers. The total under collection included in trade receivables, net at December 31, 2020 and 2019, was $22 million and $56 million, respectively. Unamortized Debt Premiums, Discounts and Issuance Costs Premiums, discounts and issuance costs incurred for the issuance of long-term debt are amortized over the term of the related financing using the effective interest method. Income Taxes Berkshire Hathaway includes MidAmerican Funding and MidAmerican Energy in its consolidated United States federal and Iowa state income tax returns. MidAmerican Funding's and MidAmerican Energy's provisions for income taxes have been computed on a stand-alone basis. Deferred income tax assets and liabilities are based on differences between the financial statement and income tax basis of assets and liabilities using enacted income tax rates expected to be in effect for the year in which the differences are expected to reverse. Changes in deferred income tax assets and liabilities that are associated with certain property-related basis differences and other various differences that MidAmerican Energy deems probable to be passed on to its customers in most state jurisdictions are charged or credited directly to a regulatory asset or liability and will be included in regulated rates when the temporary differences reverse. Other changes in deferred income tax assets and liabilities are included as a component of income tax expense. Changes in deferred income tax assets and liabilities attributable to changes in enacted income tax rates are charged or credited to income tax expense or a regulatory asset or liability in the period of enactment. Investment tax credits are generally deferred and amortized over the estimated useful lives of the related properties or as prescribed by various regulatory commissions.
MidAmerican Funding, LLC and Subsidiaries [Member]
Allowance for Doubtful Accounts [Line Items]
Summary of Significant Accounting Policies [Text Block]	In addition to the following significant accounting policies, refer to Note 2 of MidAmerican Energy's Notes to Financial Statements for significant accounting policies of MidAmerican Funding. Basis of Consolidation and Presentation The Consolidated Financial Statements include the accounts of MidAmerican Funding and its subsidiaries in which it held a controlling financial interest as of the financial statement date. Intercompany accounts and transactions have been eliminated, other than those between rate-regulated operations. The Consolidated Statements of Comprehensive Income have been omitted as net income equals comprehensive income for the years ended December 31, 2020, 2019 and 2018. Goodwill Goodwill represents the excess of the purchase price over the fair value of identifiable net assets acquired when MidAmerican Funding purchased MHC. MidAmerican Funding evaluates goodwill for impairment at least annually and completed its annual review as of October 31. When evaluating goodwill for impairment, MidAmerican Funding estimates the fair value of its reporting units. If the carrying amount of a reporting unit, including goodwill, exceeds the estimated fair value, then the identifiable assets, including identifiable intangible assets, and liabilities of the reporting unit are estimated at fair value as of the current testing date. The excess of the estimated fair value of the reporting unit over the current estimated fair value of net assets establishes the implied value of goodwill. The excess of the recorded goodwill over the implied goodwill value is charged to earnings as an impairment loss. Significant judgment is required in estimating the fair value of the reporting unit and performing goodwill impairment tests. MidAmerican Funding uses a variety of methods to estimate a reporting unit's fair value, principally discounted projected future net cash flows. Key assumptions used include, but are not limited to, the use of estimated future cash flows; multiples of earnings; and an appropriate discount rate. In estimating future cash flows, MidAmerican Funding incorporates current market information, as well as historical factors. As such, the determination of fair value incorporates significant unobservable inputs. During 2020, 2019 and 2018, MidAmerican Funding did not record any goodwill impairments.
Nevada Power Company [Member]
Allowance for Doubtful Accounts [Line Items]
Summary of Significant Accounting Policies [Text Block]	Summary of Significant Accounting Policies Basis of Consolidation and Presentation The Consolidated Financial Statements include the accounts of Nevada Power and its subsidiaries in which it holds a controlling financial interest as of the financial statement date. Intercompany accounts and transactions have been eliminated. The Consolidated Statements of Comprehensive Income have been omitted as net income equals comprehensive income for the years ended December 31, 2020, 2019 and 2018. Use of Estimates in Preparation of Financial Statements The preparation of the Consolidated Financial Statements in conformity with accounting principles generally accepted in the United States of America ("GAAP") requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the period. These estimates include, but are not limited to, the effects of regulation; recovery of long-lived assets; certain assumptions made in accounting for pension and other postretirement benefits; asset retirement obligations ("AROs"); income taxes; unbilled revenue; valuation of certain financial assets and liabilities, including derivative contracts; and accounting for contingencies. Actual results may differ from the estimates used in preparing the Consolidated Financial Statements. Accounting for the Effects of Certain Types of Regulation Nevada Power prepares its Consolidated Financial Statements in accordance with authoritative guidance for regulated operations, which recognizes the economic effects of regulation. Accordingly, Nevada Power defers the recognition of certain costs or income if it is probable that, through the ratemaking process, there will be a corresponding increase or decrease in future regulated rates. Regulatory assets and liabilities are established to reflect the impacts of these deferrals, which will be recognized in earnings in the periods the corresponding changes in regulated rates occur. Nevada Power continually evaluates the applicability of the guidance for regulated operations and whether its regulatory assets and liabilities are probable of inclusion in future regulated rates by considering factors such as a change in the regulator's approach to setting rates from cost-based ratemaking to another form of regulation, other regulatory actions or the impact of competition that could limit Nevada Power's ability to recover its costs. Nevada Power believes the application of the guidance for regulated operations is appropriate and its existing regulatory assets and liabilities are probable of inclusion in future regulated rates. The evaluation reflects the current political and regulatory climate at both the federal and state levels. If it becomes no longer probable that the deferred costs or income will be included in future regulated rates, the related regulatory assets and liabilities will be written off to net income, returned to customers or re-established as accumulated other comprehensive income (loss) ("AOCI"). Fair Value Measurements As defined under GAAP, fair value is the price that would be received to sell an asset or paid to transfer a liability between market participants in the principal market or in the most advantageous market when no principal market exists. Adjustments to transaction prices or quoted market prices may be required in illiquid or disorderly markets in order to estimate fair value. Different valuation techniques may be appropriate under the circumstances to determine the value that would be received to sell an asset or paid to transfer a liability in an orderly transaction. Market participants are assumed to be independent, knowledgeable, able and willing to transact an exchange and not under duress. Nonperformance or credit risk is considered in determining fair value. Considerable judgment may be required in interpreting market data used to develop the estimates of fair value. Accordingly, estimates of fair value presented herein are not necessarily indicative of the amounts that could be realized in a current or future market exchange. Cash Equivalents and Restricted Cash and Investments Cash equivalents consist of funds invested in money market mutual funds, United States Treasury Bills and other investments with a maturity of three months or less when purchased. Cash and cash equivalents exclude amounts where availability is restricted by legal requirements, loan agreements or other contractual provisions. Restricted amounts are included in other current assets and other assets on the Consolidated Balance Sheets. Allowance for Credit Losses Trade receivables are primarily short-term in nature with stated collection terms of less than one year from the date of origination and are stated at the outstanding principal amount, net of an estimated allowance for credit losses. The allowance for credit losses is based on Nevada Power's assessment of the collectability of amounts owed to Nevada Power by its customers. This assessment requires judgment regarding the ability of customers to pay or the outcome of any pending disputes. In measuring the allowance for credit losses for trade receivables, Nevada Power primarily utilizes credit loss history. However, Nevada Power may adjust the allowance for credit losses to reflect current conditions and reasonable and supportable forecasts that deviate from historical experience. Nevada Power also has the ability to assess deposits on customers who have delayed payments or who are deemed to be a credit risk. The changes in the balance of the allowance for credit losses, which is included in trade receivables, net on the Consolidated Balance Sheets, is summarized as follows for the years ended December 31, (in millions): 2020 2019 2018 Beginning balance $ 15 $ 16 $ 16 Charged to operating costs and expenses, net 13 12 15 Write-offs, net (9) (13) (15) Ending balance $ 19 $ 15 $ 16 Derivatives Nevada Power employs a number of different derivative contracts, which may include forwards, futures, options, swaps and other agreements, to manage its commodity price and interest rate risk. Derivative contracts are recorded on the Consolidated Balance Sheets as either assets or liabilities and are stated at estimated fair value unless they are designated as normal purchases or normal sales and qualify for the exception afforded by GAAP. Derivative balances reflect offsetting permitted under master netting agreements with counterparties and cash collateral paid or received under such agreements. Commodity derivatives used in normal business operations that are settled by physical delivery, among other criteria, are eligible for and may be designated as normal purchases or normal sales. Normal purchases or normal sales contracts are not marked‑to‑market and settled amounts are recognized as cost of fuel, energy and capacity on the Consolidated Statements of Operations. For Nevada Power's derivative contracts, the settled amount is generally included in regulated rates. Accordingly, the net unrealized gains and losses associated with interim price movements on contracts that are accounted for as derivatives and probable of inclusion in regulated rates are recorded as regulatory assets and liabilities. For a derivative contract not probable of inclusion in rates, changes in the fair value are recognized in earnings. Inventories Inventories consist mainly of materials and supplies totaling $69 million and $62 million as of December 31, 2020 and 2019. The cost is determined using the average cost method. Materials are charged to inventory when purchased and are expensed or capitalized to construction work in process, as appropriate, when used. Property, Plant and Equipment, Net General Additions to property, plant and equipment are recorded at cost. Nevada Power capitalizes all construction-related material, direct labor and contract services, as well as indirect construction costs. Indirect construction costs include debt allowance for funds used during construction ("AFUDC"), and equity AFUDC, as applicable. The cost of additions and betterments are capitalized, while costs incurred that do not improve or extend the useful lives of the related assets are generally expensed. The cost of repairs and minor replacements are charged to expense when incurred with the exception of costs for generation plant maintenance under certain long-term service agreements. Costs under these agreements are expensed straight-line over the term of the agreements as approved by the Public Utilities Commission of Nevada ("PUCN"). Depreciation and amortization are generally computed by applying the composite or straight-line method based on either estimated useful lives or mandated recovery periods as prescribed by Nevada Power's various regulatory authorities. Depreciation studies are completed by Nevada Power to determine the appropriate group lives, net salvage and group depreciation rates. These studies are reviewed and rates are ultimately approved by the applicable regulatory commission. Net salvage includes the estimated future residual values of the assets and any estimated removal costs recovered through approved depreciation rates. Estimated removal costs are recorded as a non-current regulatory liability on the Consolidated Balance Sheets. As actual removal costs are incurred, the associated liability is reduced. Generally when Nevada Power retires or sells a component of regulated property, plant and equipment depreciated using the composite method, it charges the original cost, net of any proceeds from the disposition, to accumulated depreciation. Any gain or loss on disposals of all other assets is recorded through earnings with the exception of material gains or losses on regulated property, plant and equipment depreciated on a straight-line basis, which is then recorded to a regulatory asset or liability. Debt and equity AFUDC, which represent the estimated costs of debt and equity funds necessary to finance the construction of regulated facilities, are capitalized as a component of property, plant and equipment, with offsetting credits to the Consolidated Statements of Operations. The rate applied to construction costs is the lower of the PUCN allowed rate of return and rates computed based on guidelines set forth by the Federal Energy Regulatory Commission ("FERC"). After construction is completed, Nevada Power is permitted to earn a return on these costs as a component of the related assets, as well as recover these costs through depreciation expense over the useful lives of the related assets. Nevada Power's AFUDC rate used during 2020 and 2019 was 7.43% and 7.83%, respectively. Asset Retirement Obligations Nevada Power recognizes AROs when it has a legal obligation to perform decommissioning, reclamation or removal activities upon retirement of an asset. Nevada Power's AROs are primarily associated with its generating facilities. The fair value of an ARO liability is recognized in the period in which it is incurred, if a reasonable estimate of fair value can be made, and is added to the carrying amount of the associated asset, which is then depreciated over the remaining useful life of the asset. Subsequent to the initial recognition, the ARO liability is adjusted for any revisions to the original estimate of undiscounted cash flows (with corresponding adjustments to property, plant and equipment, net) and for accretion of the ARO liability due to the passage of time. The difference between the ARO liability, the corresponding ARO asset included in property, plant and equipment, net and amounts recovered in rates to satisfy such liabilities is recorded as a regulatory asset or liability on the Consolidated Balance Sheets. The costs are not recovered in rates until the work has been completed. Impairment of Long-Lived Assets Nevada Power evaluates long-lived assets for impairment, including property, plant and equipment, when events or changes in circumstances indicate that the carrying value of such assets may not be recoverable or the assets are being held for sale. Upon the occurrence of a triggering event, the asset is reviewed to assess whether the estimated undiscounted cash flows expected from the use of the asset plus the residual value from the ultimate disposal exceeds the carrying value of the asset. If the carrying value exceeds the estimated recoverable amounts, the asset is written down to the estimated fair value and any resulting impairment loss is reflected on the Consolidated Statements of Operations. As substantially all property, plant and equipment was used in regulated businesses as of December 31, 2020, the impacts of regulation are considered when evaluating the carrying value of regulated assets. Leases Lessee Nevada Power has non-cancelable operating leases primarily for land, generating facilities, vehicles and office equipment and finance leases consisting primarily of transmission assets, generating facilities, office space and vehicles. These leases generally require Nevada Power to pay for insurance, taxes and maintenance applicable to the leased property. Given the capital intensive nature of the utility industry, it is common for a portion of lease costs to be capitalized when used during construction or maintenance of assets, in which the associated costs will be capitalized with the corresponding asset and depreciated over the remaining life of that asset. Certain leases contain renewal options for varying periods and escalation clauses for adjusting rent to reflect changes in price indices. Nevada Power does not include options in its lease calculations unless there is a triggering event indicating Nevada Power is reasonably certain to exercise the option. Nevada Power's accounting policy is to not recognize right-of-use assets and lease obligations for leases with contract terms of one year or less and not separate lease components from non-lease components and instead account for each separate lease component and the non-lease components associated with a lease as a single lease component. Leases will be evaluated for impairment in line with Accounting Standards Codification ("ASC") Topic 360, "Property, Plant and Equipment" when a triggering event has occurred that might affect the value and use of the assets being leased. Nevada Power's leases of generating facilities generally are for the long-term purchase of electric energy, also known as power purchase agreements ("PPA"). PPAs are generally signed before or during the early stages of project construction and can yield a lease that has not yet commenced. These agreements are primarily for renewable energy and the payments are considered variable lease payments as they are based on the amount of output. Nevada Power's operating and right-of-use assets are recorded in other assets and the operating lease liabilities are recorded in current and long-term other liabilities accordingly. Income Taxes Berkshire Hathaway includes Nevada Power in its consolidated United States federal income tax return. Consistent with established regulatory practice, Nevada Power's provision for income taxes has been computed on a separate return basis. Deferred income tax assets and liabilities are based on differences between the financial statement and income tax basis of assets and liabilities using enacted income tax rates expected to be in effect for the year in which the differences are expected to reverse. Changes in deferred income tax assets and liabilities that are associated with components of other comprehensive income ("OCI") are charged or credited directly to OCI. Changes in deferred income tax assets and liabilities that are associated with certain property‑related basis differences and other various differences that Nevada Power deems probable to be passed on to its customers are charged or credited directly to a regulatory asset or liability and will be included in regulated rates when the temporary differences reverse. Other changes in deferred income tax assets and liabilities are included as a component of income tax expense. Changes in deferred income tax assets and liabilities attributable to changes in enacted income tax rates are charged or credited to income tax expense or a regulatory asset or liability in the period of enactment. Valuation allowances are established when necessary to reduce deferred income tax assets to the amount that is more-likely-than-not to be realized. Investment tax credits are generally deferred and amortized over the estimated useful lives of the related properties. In determining Nevada Power's income taxes, management is required to interpret complex income tax laws and regulations, which includes consideration of regulatory implications imposed by Nevada Power's various regulatory commissions. Nevada Power's income tax returns are subject to continuous examinations by federal, state and local income tax authorities that may give rise to different interpretations of these complex laws and regulations. Due to the nature of the examination process, it generally takes years before these examinations are completed and these matters are resolved. Nevada Power recognizes the tax benefit from an uncertain tax position only if it is more-likely-than-not that the tax position will be sustained on examination by the taxing authorities, based on the technical merits of the position. The tax benefits recognized in the Consolidated Financial Statements from such a position are measured based on the largest benefit that is more-likely-than-not to be realized upon ultimate settlement. Although the ultimate resolution of Nevada Power's federal, state and local income tax examinations is uncertain, Nevada Power believes it has made adequate provisions for these income tax positions. The aggregate amount of any additional income tax liabilities that may result from these examinations, if any, is not expected to have a material impact on Nevada Power's consolidated financial results. Estimated interest and penalties, if any, related to uncertain tax positions are included as a component of income tax expense on the Consolidated Statements of Operations. Revenue Recognition Nevada Power uses a single five-step model to identify and recognize revenue from contracts with customers ("Customer Revenue") upon transfer of control of promised goods or services in an amount that reflects the consideration to which Nevada Power expects to be entitled in exchange for those goods or services. Nevada Power records sales, franchise and excise taxes collected directly from customers and remitted directly to the taxing authorities on a net basis on the Consolidated Statements of Operations. Substantially all of Nevada Power's Customer Revenue is derived from tariff-based sales arrangements approved by various regulatory commissions. These tariff-based revenues are mainly comprised of energy, transmission and distribution and have performance obligations to deliver energy products and services to customers which are satisfied over time as energy is delivered or services are provided. Other revenue consists primarily of amounts not considered Customer Revenue within ASC 606, "Revenue from Contracts with Customers" and revenue recognized in accordance with ASC 842, "Leases." Revenue recognized is equal to what Nevada Power has the right to invoice as it corresponds directly with the value to the customer of Nevada Power's performance to date and includes billed and unbilled amounts. As of December 31, 2020 and 2019, trade receivables, net on the Consolidated Balance Sheets relate substantially to Customer Revenue, including unbilled revenue of $104 million and $109 million, respectively. Payments for amounts billed are generally due from the customer within 30 days of billing. Rates charged for energy products and services are established by regulators or contractual arrangements that establish the transaction price as well as the allocation of price amongst the separate performance obligations. When preliminary regulated rates are permitted to be billed prior to final approval by the applicable regulator, certain revenue collected may be subject to refund and a liability for estimated refunds is accrued. In addition, Nevada Power has recognized contract assets of $8 million and $9 million as of December 31, 2020 and 2019, respectively, due to Nevada Power's performance on certain contracts. Unamortized Debt Premiums, Discounts and Issuance Costs Premiums, discounts and financing costs incurred for the issuance of long-term debt are amortized over the term of the related financing on a straight-line basis. Segment Information Nevada Power currently has one segment, which includes its regulated electric utility operations.
Sierra Pacific Power Company [Member]
Allowance for Doubtful Accounts [Line Items]
Summary of Significant Accounting Policies [Text Block]	Summary of Significant Accounting Policies Basis of Presentation The Statements of Comprehensive Income have been omitted as net income equals comprehensive income for the years ended December 31, 2020, 2019 and 2018. Use of Estimates in Preparation of Financial Statements The preparation of the Financial Statements in conformity with accounting principles generally accepted in the United States of America ("GAAP") requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the period. These estimates include, but are not limited to, the effects of regulation; recovery of long-lived assets; certain assumptions made in accounting for pension and other postretirement benefits; asset retirement obligations ("AROs"); income taxes; unbilled revenue; valuation of certain financial assets and liabilities, including derivative contracts; and accounting for contingencies. Actual results may differ from the estimates used in preparing the Financial Statements. Accounting for the Effects of Certain Types of Regulation Sierra Pacific prepares its Financial Statements in accordance with authoritative guidance for regulated operations, which recognizes the economic effects of regulation. Accordingly, Sierra Pacific defers the recognition of certain costs or income if it is probable that, through the ratemaking process, there will be a corresponding increase or decrease in future regulated rates. Regulatory assets and liabilities are established to reflect the impacts of these deferrals, which will be recognized in earnings in the periods the corresponding changes in regulated rates occur. Sierra Pacific continually evaluates the applicability of the guidance for regulated operations and whether its regulatory assets and liabilities are probable of inclusion in future regulated rates by considering factors such as a change in the regulator's approach to setting rates from cost-based ratemaking to another form of regulation, other regulatory actions or the impact of competition that could limit Sierra Pacific's ability to recover its costs. Sierra Pacific believes the application of the guidance for regulated operations is appropriate and its existing regulatory assets and liabilities are probable of inclusion in future regulated rates. The evaluation reflects the current political and regulatory climate at both the federal and state levels. If it becomes no longer probable that the deferred costs or income will be included in future regulated rates, the related regulatory assets and liabilities will be written off to net income, returned to customers or re-established as accumulated other comprehensive income (loss) ("AOCI"). Fair Value Measurements As defined under GAAP, fair value is the price that would be received to sell an asset or paid to transfer a liability between market participants in the principal market or in the most advantageous market when no principal market exists. Adjustments to transaction prices or quoted market prices may be required in illiquid or disorderly markets in order to estimate fair value. Different valuation techniques may be appropriate under the circumstances to determine the value that would be received to sell an asset or paid to transfer a liability in an orderly transaction. Market participants are assumed to be independent, knowledgeable, able and willing to transact an exchange and not under duress. Nonperformance or credit risk is considered in determining fair value. Considerable judgment may be required in interpreting market data used to develop the estimates of fair value. Accordingly, estimates of fair value presented herein are not necessarily indicative of the amounts that could be realized in a current or future market exchange. Cash Equivalents and Restricted Cash and Investments Cash equivalents consist of funds invested in money market mutual funds, United States Treasury Bills and other investments with a maturity of three months or less when purchased. Cash and cash equivalents exclude amounts where availability is restricted by legal requirements, loan agreements or other contractual provisions. Restricted amounts are included in other current assets and other assets on the Balance Sheets. Allowance for Credit Losses Trade receivables are primarily short-term in nature with stated collection terms of less than one year from the date of origination and are stated at the outstanding principal amount, net of an estimated allowance for credit losses. The allowance for credit losses is based on Sierra Pacific's assessment of the collectability of amounts owed to Sierra Pacific by its customers. This assessment requires judgment regarding the ability of customers to pay or the outcome of any pending disputes. In measuring the allowance for credit losses for trade receivables, Sierra Pacific primarily utilizes credit loss history. However, Sierra Pacific may adjust the allowance for credit losses to reflect current conditions and reasonable and supportable forecasts that deviate from historical experience. Sierra Pacific also has the ability to assess deposits on customers who have delayed payments or who are deemed to be a credit risk. The changes in the balance of the allowance for credit losses, which is included in trade receivables, net on the Consolidated Balance Sheets, is summarized as follows for the years ended December 31, (in millions): 2020 2019 2018 Beginning balance $ 2 $ 2 $ 2 Charged to operating costs and expenses, net 2 1 1 Write-offs, net (2) (1) (1) Ending balance $ 2 $ 2 $ 2 Derivatives Sierra Pacific employs a number of different derivative contracts, which may include forwards, futures, options, swaps and other agreements, to manage its commodity price and interest rate risk. Derivative contracts are recorded on the Balance Sheets as either assets or liabilities and are stated at estimated fair value unless they are designated as normal purchases or normal sales and qualify for the exception afforded by GAAP. Derivative balances reflect offsetting permitted under master netting agreements with counterparties and cash collateral paid or received under such agreements. Commodity derivatives used in normal business operations that are settled by physical delivery, among other criteria, are eligible for and may be designated as normal purchases or normal sales. Normal purchases or normal sales contracts are not marked‑to‑market and settled amounts are recognized as cost of fuel, energy and capacity or natural gas purchased for resale on the Statements of Operations. For Sierra Pacific's derivative contracts, the settled amount is generally included in regulated rates. Accordingly, the net unrealized gains and losses associated with interim price movements on contracts that are accounted for as derivatives and probable of inclusion in regulated rates are recorded as regulatory assets and liabilities. For a derivative contract not probable of inclusion in rates, changes in the fair value are recognized in earnings. Inventories Inventories consist mainly of materials and supplies totaling $67 million and $49 million as of December 31, 2020 and 2019, respectively, and fuel, which includes coal stock, stored natural gas and fuel oil, totaling $10 million and $8 million as of December 31, 2020 and 2019, respectively. The cost is determined using the average cost method. Materials are charged to inventory when purchased and are expensed or capitalized to construction work in process, as appropriate, when used. Fuel costs are recovered from retail customers through the base tariff energy rates and deferred energy accounting adjustment charges approved by the Public Utilities Commission of Nevada ("PUCN"). Property, Plant and Equipment, Net General Additions to property, plant and equipment are recorded at cost. Sierra Pacific capitalizes all construction-related material, direct labor and contract services, as well as indirect construction costs. Indirect construction costs include debt allowance for funds used during construction ("AFUDC"), and equity AFUDC, as applicable. The cost of additions and betterments are capitalized, while costs incurred that do not improve or extend the useful lives of the related assets are generally expensed. The cost of repairs and minor replacements are charged to expense when incurred with the exception of costs for generation plant maintenance under certain long-term service agreements. Costs under these agreements are expensed straight-line over the term of the agreements as approved by the PUCN. Depreciation and amortization are generally computed by applying the composite or straight-line method based on either estimated useful lives or mandated recovery periods as prescribed by Sierra Pacific's various regulatory authorities. Depreciation studies are completed by Sierra Pacific to determine the appropriate group lives, net salvage and group depreciation rates. These studies are reviewed and rates are ultimately approved by the applicable regulatory commission. Net salvage includes the estimated future residual values of the assets and any estimated removal costs recovered through approved depreciation rates. Estimated removal costs are recorded as a non-current regulatory liability on the Balance Sheets. As actual removal costs are incurred, the associated liability is reduced. Generally when Sierra Pacific retires or sells a component of regulated property, plant and equipment depreciated using the composite method, it charges the original cost, net of any proceeds from the disposition, to accumulated depreciation. Any gain or loss on disposals of all other assets is recorded through earnings with the exception of material gains or losses on regulated property, plant and equipment depreciated on a straight-line basis, which is then recorded to a regulatory asset or liability. Debt and equity AFUDC, which represent the estimated costs of debt and equity funds necessary to finance the construction of regulated facilities, are capitalized as a component of property, plant and equipment, with offsetting credits to the Statements of Operations. The rate applied to construction costs is the lower of the PUCN allowed rate of return and rates computed based on guidelines set forth by the Federal Energy Regulatory Commission ("FERC"). After construction is completed, Sierra Pacific is permitted to earn a return on these costs as a component of the related assets, as well as recover these costs through depreciation expense over the useful lives of the related assets. Sierra Pacific's AFUDC rate used during 2020 and 2019 was 6.75% and 6.65% for electric, respectively, 5.75% for natural gas and 6.65% and 6.55% for common facilities, respectively. Asset Retirement Obligations Sierra Pacific recognizes AROs when it has a legal obligation to perform decommissioning, reclamation or removal activities upon retirement of an asset. Sierra Pacific's AROs are primarily associated with its generating facilities. The fair value of an ARO liability is recognized in the period in which it is incurred, if a reasonable estimate of fair value can be made, and is added to the carrying amount of the associated asset, which is then depreciated over the remaining useful life of the asset. Subsequent to the initial recognition, the ARO liability is adjusted for any revisions to the original estimate of undiscounted cash flows (with corresponding adjustments to property, plant and equipment, net) and for accretion of the ARO liability due to the passage of time. The difference between the ARO liability, the corresponding ARO asset included in property, plant and equipment, net and amounts recovered in rates to satisfy such liabilities is recorded as a regulatory asset or liability on the Balance Sheets. The costs are not recovered in rates until the work has been completed. Impairment of Long-Lived Assets Sierra Pacific evaluates long-lived assets for impairment, including property, plant and equipment, when events or changes in circumstances indicate that the carrying value of such assets may not be recoverable or the assets are being held for sale. Upon the occurrence of a triggering event, the asset is reviewed to assess whether the estimated undiscounted cash flows expected from the use of the asset plus the residual value from the ultimate disposal exceeds the carrying value of the asset. If the carrying value exceeds the estimated recoverable amounts, the asset is written down to the estimated fair value and any resulting impairment loss is reflected on the Statements of Operations. As substantially all property, plant and equipment was used in regulated businesses as of December 31, 2020, the impacts of regulation are considered when evaluating the carrying value of regulated assets. Leases Lessee Sierra Pacific has non-cancelable operating leases primarily for transmission and delivery assets, generating facilities, vehicles and office equipment and finance leases consisting primarily of transmission assets, generating facilities and vehicles. These leases generally require Sierra Pacific to pay for insurance, taxes and maintenance applicable to the leased property. Given the capital intensive nature of the utility industry, it is common for a portion of lease costs to be capitalized when used during construction or maintenance of assets, in which the associated costs will be capitalized with the corresponding asset and depreciated over the remaining life of that asset. Certain leases contain renewal options for varying periods and escalation clauses for adjusting rent to reflect changes in price indices. Sierra Pacific does not include options in its lease calculations unless there is a triggering event indicating Sierra Pacific is reasonably certain to exercise the option. Sierra Pacific's accounting policy is to not recognize right-of-use assets and lease obligations for leases with contract terms of one year or less and not separate lease components from non-lease components and instead account for each separate lease component and the non-lease components associated with a lease as a single lease component. Leases will be evaluated for impairment in line with Accounting Standards Codification ("ASC") Topic 360, "Property, Plant and Equipment" when a triggering event has occurred that might affect the value and use of the assets being leased. Sierra Pacific's leases of generating facilities generally are for the long-term purchase of electric energy, also known as power purchase agreements ("PPA"). PPAs are generally signed before or during the early stages of project construction and can yield a lease that has not yet commenced. These agreements are primarily for renewable energy and the payments are considered variable lease payments as they are based on the amount of output. Sierra Pacific's operating and finance right-of-use assets are recorded in other assets and the operating and current finance lease liabilities are recorded in current and long-term other liabilities accordingly. Income Taxes Berkshire Hathaway includes Sierra Pacific in its consolidated United States federal income tax return. Consistent with established regulatory practice, Sierra Pacific's provision for income taxes has been computed on a separate return basis. Deferred income tax assets and liabilities are based on differences between the financial statement and income tax basis of assets and liabilities using enacted income tax rates expected to be in effect for the year in which the differences are expected to reverse. Changes in deferred income tax assets and liabilities that are associated with components of other comprehensive income ("OCI") are charged or credited directly to OCI. Changes in deferred income tax assets and liabilities that are associated with certain property-related basis differences and other various differences that Sierra Pacific deems probable to be passed on to its customers are charged or credited directly to a regulatory asset or liability and will be included in regulated rates when the temporary differences reverse. Other changes in deferred income tax assets and liabilities are included as a component of income tax expense. Changes in deferred income tax assets and liabilities attributable to changes in enacted income tax rates are charged or credited to income tax expense or a regulatory asset or liability in the period of enactment. Valuation allowances are established when necessary to reduce deferred income tax assets to the amount that is more-likely-than-not to be realized. Investment tax credits are generally deferred and amortized over the estimated useful lives of the related properties. In determining Sierra Pacific's income taxes, management is required to interpret complex income tax laws and regulations, which includes consideration of regulatory implications imposed by Sierra Pacific's various regulatory commissions. Sierra Pacific's income tax returns are subject to continuous examinations by federal, state and local income tax authorities that may give rise to different interpretations of these complex laws and regulations. Due to the nature of the examination process, it generally takes years before these examinations are completed and these matters are resolved. Sierra Pacific recognizes the tax benefit from an uncertain tax position only if it is more-likely-than-not that the tax position will be sustained on examination by the taxing authorities, based on the technical merits of the position. The tax benefits recognized in the Financial Statements from such a position are measured based on the largest benefit that is more-likely-than-not to be realized upon ultimate settlement. Although the ultimate resolution of Sierra Pacific's federal, state and local income tax examinations is uncertain, Sierra Pacific believes it has made adequate provisions for these income tax positions. The aggregate amount of any additional income tax liabilities that may result from these examinations, if any, is not expected to have a material impact on Sierra Pacific's financial results. Estimated interest and penalties, if any, related to uncertain tax positions are included as a component of income tax expense on the Statements of Operations. Revenue Recognition Sierra Pacific uses a single five-step model to identify and recognize revenue from contracts with customers ("Customer Revenue") upon transfer of control of promised goods or services in an amount that reflects the consideration to which Sierra Pacific expects to be entitled in exchange for those goods or services. Sierra Pacific records sales, franchise and excise taxes collected directly from customers and remitted directly to the taxing authorities on a net basis on the Statements of Operations. Substantially all of Sierra Pacific's Customer Revenue is derived from tariff-based sales arrangements approved by various regulatory commissions. These tariff-based revenues are mainly comprised of energy, transmission, distribution and natural gas and have performance obligations to deliver energy products and services to customers which are satisfied over time as energy is delivered or services are provided. Other revenue consists primarily of revenue recognized in accordance with ASC 842, "Leases" and amounts not considered Customer Revenue within ASC 606, "Revenue from Contracts with Customers." Revenue recognized is equal to what Sierra Pacific has the right to invoice as it corresponds directly with the value to the customer of Sierra Pacific's performance to date and includes billed and unbilled amounts. As of December 31, 2020 and 2019, trade receivables, net on the Balance Sheets relate substantially to Customer Revenue, including unbilled revenue of $59 million and $63 million, respectively. Payments for amounts billed are generally due from the customer within 30 days of billing. Rates charged for energy products and services are established by regulators or contractual arrangements that establish the transaction price as well as the allocation of price amongst the separate performance obligations. When preliminary regulated rates are permitted to be billed prior to final approval by the applicable regulator, certain revenue collected may be subject to refund and a liability for estimated refunds is accrued. Unamortized Debt Premiums, Discounts and Issuance Costs Premiums, discounts and financing costs incurred for the issuance of long-term debt are amortized over the term of the related financing on a straight-line basis.
Eastern Energy Gas Holdings, LLC [Member]
Allowance for Doubtful Accounts [Line Items]
Summary of Significant Accounting Policies [Text Block]	Summary of Significant Accounting Policies Basis of Consolidation and Presentation The Consolidated Financial Statements include the accounts of Eastern Energy Gas and its subsidiaries in which it holds a controlling financial interest as of the financial statement date. Intercompany accounts and transactions have been eliminated. Certain amounts in Eastern Energy Gas' 2019 and 2018 Consolidated Financial Statements and Notes have been reclassified to conform to the 2020 presentation for comparative purposes; however, such reclassifications did not affect Eastern Energy Gas' net income, total assets, liabilities, equity or cash flows. Use of Estimates in Preparation of Financial Statements The preparation of the Consolidated Financial Statements in conformity with accounting principles generally accepted in the United States of America ("GAAP") requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the period. These estimates include, but are not limited to, the effects of regulation; impairment of goodwill; recovery of long-lived assets; certain assumptions made in accounting for pension and other postretirement benefits; asset retirement obligations ("AROs"); income taxes; unbilled revenue; valuation of certain financial assets and liabilities, including derivative contracts; and accounting for contingencies. Actual results may differ from the estimates used in preparing the Consolidated Financial Statements. Accounting for the Effects of Certain Types of Regulation Eastern Energy Gas prepares its Consolidated Financial Statements in accordance with authoritative guidance for regulated operations, which recognizes the economic effects of regulation. Accordingly, Eastern Energy Gas defers the recognition of certain costs or income if it is probable that, through the ratemaking process, there will be a corresponding increase or decrease in future regulated rates. Regulatory assets and liabilities are established to reflect the impacts of these deferrals, which will be recognized in earnings in the periods the corresponding changes in regulated rates occur. Eastern Energy Gas continually evaluates the applicability of the guidance for regulated operations and whether its regulatory assets and liabilities are probable of inclusion in future regulated rates by considering factors such as a change in the regulator's approach to setting rates from cost-based ratemaking to another form of regulation, other regulatory actions or the impact of competition that could limit Eastern Energy Gas' ability to recover its costs. Eastern Energy Gas believes the application of the guidance for regulated operations is appropriate and its existing regulatory assets and liabilities are probable of inclusion in future regulated rates. The evaluation reflects the current political and regulatory climate at the federal and state levels. If it becomes no longer probable that the deferred costs or income will be included in future regulated rates, the related regulatory assets and liabilities will be recognized in net income, returned to customers or re-established as accumulated other comprehensive income (loss) ("AOCI"). Fair Value Measurements As defined under GAAP, fair value is the price that would be received to sell an asset or paid to transfer a liability between market participants in the principal market or in the most advantageous market when no principal market exists. Adjustments to transaction prices or quoted market prices may be required in illiquid or disorderly markets in order to estimate fair value. Alternative valuation techniques may be appropriate under the circumstances to determine the value that would be received to sell an asset or paid to transfer a liability in an orderly transaction. Market participants are assumed to be independent, knowledgeable, able and willing to transact an exchange and not under duress. Nonperformance or credit risk is considered in determining fair value. Considerable judgment may be required in interpreting market data used to develop the estimates of fair value. Accordingly, estimates of fair value presented herein are not necessarily indicative of the amounts that could be realized in a current or future market exchange. Cash Equivalents and Restricted Cash and Cash Equivalents and Investments Cash equivalents consist of funds invested in money market mutual funds, United States Treasury Bills and other investments with a maturity of three months or less when purchased. Cash and cash equivalents exclude amounts where availability is restricted by legal requirements, loan agreements or other contractual provisions. Restricted amounts are included in restricted cash and cash equivalents on the Consolidated Balance Sheets. Investments Eastern Energy Gas utilizes the equity method of accounting with respect to investments when it possesses the ability to exercise significant influence, but not control, over the operating and financial policies of the investee. The ability to exercise significant influence is presumed when the investor possesses more than 20% of the voting interests of the investee. This presumption may be overcome based on specific facts and circumstances that demonstrate the ability to exercise significant influence is restricted. In applying the equity method, Eastern Energy Gas records the investment at cost and subsequently increases or decreases the carrying value of the investment by Eastern Energy Gas' share of the net earnings or losses and other comprehensive income ("OCI") of the investee. Eastern Energy Gas records dividends or other equity distributions as reductions in the carrying value of the investment. Equity investments are presented on the Consolidated Balance Sheets. Allowance for Credit Losses Trade receivables are primarily short-term in nature with stated collection terms of less than one year from the date of origination and are stated at the outstanding principal amount, net of an estimated allowance for credit losses. The allowance for credit losses is based on Eastern Energy Gas' assessment of the collectability of amounts owed to Eastern Energy Gas by its customers. This assessment requires judgment regarding the ability of customers to pay or the outcome of any pending disputes. In measuring the allowance for credit losses for trade receivables, Eastern Energy Gas primarily utilizes credit loss history. However, Eastern Energy Gas may adjust the allowance for credit losses to reflect current conditions and reasonable and supportable forecasts that deviate from historical experience. The changes in the balance of the allowance for credit losses, which is included in trades receivables, net on the Consolidated Balance Sheets, is summarized as follows for the years ended December 31, (in millions): 2020 2019 2018 Beginning balance $ 2 $ — $ — Charged to operating costs and expenses, net 4 2 — Write-offs, net (1) — — Ending balance $ 5 $ 2 $ — Derivatives Eastern Energy Gas employs a number of different derivative contracts, which may include forwards, futures, options, swaps and other agreements, to manage its commodity price, interest rate, and foreign currency exchange rate risk. Derivative contracts are recorded on the Consolidated Balance Sheets as either assets or liabilities and are stated at estimated fair value unless they are designated as normal purchases or normal sales and qualify for the exception afforded by GAAP. Derivative balances reflect offsetting permitted under master netting agreements with counterparties and cash collateral paid or received under such agreements. Cash collateral received from or paid to counterparties to secure derivative contract assets or liabilities in excess of amounts offset is included in other current assets on the Consolidated Balance Sheets. Commodity derivatives used in normal business operations that are settled by physical delivery, among other criteria, are eligible for and may be designated as normal purchases or normal sales. Normal purchases or normal sales contracts are not marked-to-market and settled amounts are recognized as operating revenue or cost of sales on the Consolidated Statements of Operations. For Eastern Energy Gas' derivatives not designated as hedging contracts, unrealized gains and losses are recognized on the Consolidated Statements of Operations as operating revenue for derivatives related to natural gas sales contracts; and other, net for interest rate swap derivatives. For Eastern Energy Gas' derivatives designated as hedging contracts, Eastern Energy Gas formally assesses, at inception and thereafter, whether the hedging contract is highly effective in offsetting changes in the hedged item. Eastern Energy Gas formally documents hedging activity by transaction type and risk management strategy. For derivative instruments that are accounted for as cash flow hedges or fair value hedges, the cash flows from the derivatives and from the related hedged items are classified in operating cash flows. Changes in the estimated fair value of a derivative contract designated and qualified as a cash flow hedge, to the extent effective, are included on the Consolidated Statements of Changes in Equity as AOCI, net of tax, until the contract settles and the hedged item is recognized in earnings. Eastern Energy Gas discontinues hedge accounting prospectively when it has determined that a derivative contract no longer qualifies as an effective hedge, or when it is no longer probable that the hedged forecasted transaction will occur. When hedge accounting is discontinued because the derivative contract no longer qualifies as an effective hedge, future changes in the estimated fair value of the derivative contract are charged to earnings. Gains and losses related to discontinued hedges that were previously recorded in AOCI will remain in AOCI until the contract settles and the hedged item is recognized in earnings, unless it becomes probable that the hedged forecasted transaction will not occur at which time associated deferred amounts in AOCI are immediately recognized in earnings. Inventories Inventories consist mainly of materials and supplies and are determined using the average cost method. Gas Imbalances Natural gas imbalances occur when the physical amount of natural gas delivered from, or received by, a pipeline system or storage facility differs from the contractual amount of natural gas delivered or received. Eastern Energy Gas values these imbalances due to, or from, shippers and operators at an appropriate index price at period end, subject to the terms of its tariff for regulated entities. Imbalances are primarily settled in-kind. Imbalances due to Eastern Energy Gas from other parties are reported in other current assets and imbalances that Eastern Energy Gas owes to other parties are reported in other current liabilities on the Consolidated Balance Sheets. Property, Plant and Equipment, Net General Additions to property, plant and equipment are recorded at cost. Eastern Energy Gas capitalizes all construction-related materials, direct labor and contract services, as well as indirect construction costs. Indirect construction costs include capitalized interest, including debt allowance for funds used during construction ("AFUDC"), and equity AFUDC, as applicable. The cost of additions and betterments are capitalized, while costs incurred that do not improve or extend the useful lives of the related assets are generally expensed. Depreciation and amortization are generally computed by applying the composite or straight-line method based on estimated useful lives. Depreciation studies are completed by Eastern Energy Gas to determine the appropriate group lives, net salvage and group depreciation rates. These studies are reviewed and rates are ultimately approved by the FERC. Net salvage includes the estimated future residual values of the assets and any estimated removal costs recovered through approved depreciation rates. Estimated removal costs are recorded as either a cost of removal regulatory liability or an ARO liability on the Consolidated Balance Sheets, depending on whether the obligation meets the requirements of an ARO. As actual removal costs are incurred, the associated liability is reduced. Generally when Eastern Energy Gas retires or sells a component of regulated property, plant and equipment, it charges the original cost, net of any proceeds from the disposition, to accumulated depreciation. Any gain or loss on disposals of all other assets is recorded through earnings. Debt and equity AFUDC, which represent the estimated costs of debt and equity funds necessary to finance the construction of regulated facilities, is capitalized by Eastern Energy Gas as a component of property, plant and equipment, with offsetting credits to the Consolidated Statements of Operations. AFUDC is computed based on guidelines set forth by the FERC. After construction is completed, Eastern Energy Gas is permitted to earn a return on these costs as a component of the related assets, as well as recover these costs through depreciation expense over the useful lives of the related assets. Asset Retirement Obligations Eastern Energy Gas recognizes AROs when it has a legal obligation to perform decommissioning, reclamation or removal activities upon retirement of an asset. Eastern Energy Gas' AROs are primarily related to the obligations associated with its natural gas pipeline and storage well assets. The fair value of an ARO liability is recognized in the period in which it is incurred, if a reasonable estimate of fair value can be made, and is added to the carrying amount of the associated asset, which is then depreciated over the remaining useful life of the asset. Subsequent to the initial recognition, the ARO liability is adjusted for any revisions to the original estimate of undiscounted cash flows (with corresponding adjustments to property, plant and equipment, net) and for accretion of the ARO liability due to the passage of time. For Eastern Energy Gas, the difference between the ARO liability, the corresponding ARO asset included in property, plant and equipment, net and amounts recovered in rates to satisfy such liabilities is recorded as a regulatory asset or liability. Impairment of Long-Lived Assets Eastern Energy Gas evaluates long-lived assets for impairment, including property, plant and equipment, when events or changes in circumstances indicate that the carrying value of such assets may not be recoverable or the assets are being held for sale. Upon the occurrence of a triggering event, the asset is reviewed to assess whether the estimated undiscounted cash flows expected from the use of the asset plus the residual value from the ultimate disposal exceeds the carrying value of the asset. If the carrying value exceeds the estimated recoverable amounts, the asset is written down to the estimated fair value and any resulting impairment loss is reflected on the Consolidated Statements of Operations. The impacts of regulation are considered when evaluating the carrying value of regulated assets. See Notes 4 and 7 for more information. Leases Eastern Energy Gas has non-cancelable operating leases primarily for office space, office equipment and land and finance leases consisting primarily of natural gas pipeline facilities and vehicles. These leases generally require Eastern Energy Gas to pay for insurance, taxes and maintenance applicable to the leased property. Given the capital intensive nature of the utility industry, it is common for a portion of lease costs to be capitalized when used during construction or maintenance of assets, in which the associated costs will be capitalized with the corresponding asset and depreciated over the remaining life of that asset. Certain leases contain renewal options for varying periods and escalation clauses for adjusting rent to reflect changes in price indices. Eastern Energy Gas does not include options in its lease calculations unless there is a triggering event indicating Eastern Energy Gas is reasonably certain to exercise the option. Eastern Energy Gas' accounting policy is to not recognize right-of-use assets and lease obligations for leases with contract terms of one year or less and not separate lease components from non-lease components and instead account for each separate lease component and the non-lease components associated with a lease as a single lease component. Leases will be evaluated for impairment in line with Accounting Standards Codification ("ASC") 360, "Property, Plant and Equipment" when a triggering event has occurred that might affect the value and use of the assets being leased. Eastern Energy Gas' operating and finance right-of-use assets are recorded in other assets and the operating and finance lease liabilities are recorded in current and long-term other liabilities accordingly. Goodwill Goodwill represents the excess of the purchase price over the fair value of identifiable net assets acquired in business combinations. Eastern Energy Gas evaluates goodwill for impairment at least annually. Prior to the GT&S Transaction, Eastern Energy Gas evaluated goodwill for impairment as of April 1. As a result of the GT&S Transaction, Eastern Energy Gas will complete its annual reviews as of October 31 to align with BHE's policy. When evaluating goodwill for impairment, Eastern Energy Gas estimates the fair value of its reporting units. If the carrying amount of a reporting unit, including goodwill, exceeds the estimated fair value, then the identifiable assets, including identifiable intangible assets, and liabilities of the reporting unit are estimated at fair value as of the current testing date. The excess of the estimated fair value of the reporting unit over the current estimated fair value of net assets establishes the implied value of goodwill. The excess of the recorded goodwill over the implied goodwill value is charged to earnings as an impairment loss. Significant judgment is required in estimating the fair value of the reporting unit and performing goodwill impairment tests. Eastern Energy Gas uses a variety of methods to estimate a reporting unit's fair value, principally discounted projected future net cash flows. Key assumptions used include, but are not limited to, the use of estimated future cash flows; multiples of earnings; and an appropriate discount rate. In estimating future cash flows, Eastern Energy Gas incorporates current market information, as well as historical factors. As such, the determination of fair value incorporates significant unobservable inputs. During 2020, 2019 and 2018, Eastern Energy Gas did not record any goodwill impairments. Eastern Energy Gas records goodwill adjustments for (a) the tax benefit associated with the excess of tax-deductible goodwill over the reported amount of goodwill and (b) changes to the purchase price allocation prior to the end of the measurement period, which is not to exceed one year from the acquisition date. Revenue Recognition Eastern Energy Gas uses a single five-step model to identify and recognize revenue from contracts with customers ("Customer Revenue") upon transfer of control of promised goods or services in an amount that reflects the consideration to which Eastern Energy Gas expects to be entitled in exchange for those goods or services. Eastern Energy Gas records sales and excise taxes collected directly from customers and remitted directly to the taxing authorities on a net basis on the Consolidated Statements of Operations. A majority of Eastern Energy Gas' energy revenue is derived from tariff-based sales arrangements approved by the FERC. These tariff-based revenues are mainly comprised of natural gas transmission and storage services and have performance obligations which are satisfied over time as services are provided. Eastern Energy Gas' revenue that is nonregulated primarily relates to LNG terminalling services. Revenue recognized is equal to what Eastern Energy Gas has the right to invoice as it corresponds directly with the value to the customer of Eastern Energy Gas' performance to date and includes billed and unbilled amounts. As of December 31, 2020 and 2019, trade receivables, net on the Consolidated Balance Sheets relate substantially to Customer Revenue, including unbilled revenue of $95 million and $104 million, respectively. Payments for amounts billed are generally due from the customer within 30 days of billing. Rates charged for energy products and services are established by regulators or contractual arrangements that establish the transaction price as well as the allocation of price amongst the separate performance obligations. When preliminary regulated rates are permitted to be billed prior to final approval by the applicable regulator, certain revenue collected may be subject to refund and a liability for estimated refunds is accrued. In the event one of the parties to a contract has performed before the other, Eastern Energy Gas would recognize a contract asset or contract liability depending on the relationship between Eastern Energy Gas' performance and the customer's payment. Eastern Energy Gas has recognized contract assets of $29 million and $40 million as of December 31, 2020 and 2019, respectively, and $19 million and $20 million of contract liabilities as of December 31, 2020 and 2019, respectively, due to Eastern Energy Gas' performance on certain contracts. Unamortized Debt Premiums, Discounts and Debt Issuance Costs Premiums, discounts and debt issuance costs incurred for the issuance of long-term debt are amortized over the term of the related financing using the effective interest method. Income Taxes Prior to the GT&S Transaction, DEI included Eastern Energy Gas in its consolidated United States federal income tax return. Subsequent to the GT&S Transaction, Berkshire Hathaway includes Eastern Energy Gas in its consolidated United States federal income tax return. Consistent with established regulatory practice, Eastern Energy Gas' provision for income taxes has been computed on a stand-alone return basis. Deferred income tax assets and liabilities are based on differences between the financial statement and income tax basis of assets and liabilities using enacted income tax rates expected to be in effect for the year in which the differences are expected to reverse. Changes in deferred income tax assets and liabilities associated with components of OCI are charged or credited directly to OCI. Changes in deferred income tax assets and liabilities associated with certain property-related basis differences and other various differences that Eastern Energy Gas' regulated businesses deems probable to be passed on to its customers are charged or credited directly to a regulatory asset or liability and will be included in regulated rates when the temporary differences reverse. Other changes in deferred income tax assets and liabilities are included as a component of income tax expense. Changes in deferred income tax assets and liabilities attributable to changes in enacted income tax rates are charged or credited to income tax expense or a regulatory asset or liability in the period of enactment. Valuation allowances are established when necessary to reduce deferred income tax assets to the amount that is more-likely-than-not to be realized. In determining Eastern Energy Gas' income taxes, management is required to interpret complex income tax laws and regulations, which includes consideration of regulatory implications imposed by the FERC. Eastern Energy Gas' income tax returns are subject to continuous examinations by federal, state and local income tax authorities that may give rise to different interpretations of these complex laws and regulations. Due to the nature of the examination process, it generally takes years before these examinations are completed and these matters are resolved. Eastern Energy Gas recognizes the tax benefit from an uncertain tax position only if it is more-likely-than-not that the tax position will be sustained on examination by the taxing authorities, based on the technical merits of the position. The tax benefits recognized in the Consolidated Financial Statements from such a position are measured based on the largest benefit that is more-likely-than-not to be realized upon ultimate settlement. Although the ultimate resolution of Eastern Energy Gas' federal, state and local income tax examinations is uncertain, Eastern Energy Gas believes it has made adequate provisions for these income tax positions. The aggregate amount of any additional income tax liabilities that may result from these examinations, if any, is not expected to have a material impact on Eastern Energy Gas' consolidated financial results. Estimated interest and penalties, if any, related to uncertain tax positions are included as a component of income tax expense on the Consolidated Statements of Operations. Segment Information Eastern Energy Gas currently has one segment, which includes its natural gas pipeline, storage and LNG operations.

Business Acquisitions (Notes)

Business Acquisitions (Notes)	12 Months Ended
	Dec. 31, 2020
Business Acquisition [Line Items]
Business Acquisitions [Text Block]	Business Acquisitions BHE GT&S Acquisition Transaction Description On November 1, 2020, BHE completed its acquisition of substantially all of the natural gas transmission and storage business of Dominion Energy, Inc. ("DEI") and Dominion Energy Questar Corporation ("Dominion Questar"), exclusive of Dominion Energy Questar Pipeline, LLC and related entities (the "Questar Pipeline Group") (the "GT&S Transaction"). Under the terms of the Purchase and Sale Agreement, dated July 3, 2020 (the "GT&S Purchase Agreement"), BHE paid approximately $2.5 billion in cash, after post-closing adjustments (the "GT&S Cash Consideration"), and assumed approximately $5.6 billion of existing indebtedness for borrowed money, including fair value adjustments, for 100% of the equity interests of Eastern Gas Transmission and Storage, Inc. ("EGTS") (formerly known as Dominion Energy Transmission, Inc.) and Carolina Gas Transmission, LLC (formerly known as Dominion Energy Carolina Gas Transmission, LLC); 50% of the equity interests of Iroquois Gas Transmission System L.P. ("Iroquois"); and a 25% economic interest in Cove Point LNG, LP ("Cove Point") (formerly known as Dominion Energy Cove Point LNG, LP), consisting of 100% of the general partnership interest and 25% of the total limited partnership interests. BHE became the operator of Cove Point after the GT&S Transaction. The GT&S Transaction received clearance under the Hart-Scott-Rodino Antitrust Improvements Act of 1976, as amended ("HSR Approval") in October 2020, and approval by the Department of Energy with respect to a change in control of Cove Point and the Federal Communications Commission with respect to the transfer of certain licenses earlier in 2020. On October 5, 2020, DEI and Dominion Questar, as permitted under the terms of the GT&S Purchase Agreement, delivered notice to BHE of their election to terminate the GT&S Transaction with respect to the Questar Pipeline Group and, in connection with the execution of the Q-Pipe Purchase Agreement referenced below, to waive the related termination fee under the GT&S Purchase Agreement. Also on October 5, 2020, BHE entered into a second Purchase and Sale Agreement (the "Q-Pipe Purchase Agreement") with Dominion Questar providing for BHE's purchase of the Questar Pipeline Group from Dominion Questar (the "Q-Pipe Transaction") after receipt of HSR Approval, which is currently anticipated in the first half of 2021, for a cash purchase price of approximately $1.3 billion (the "Q-Pipe Cash Consideration"), subject to adjustment for cash and indebtedness as of the closing, and the assumption of approximately $430 million of existing indebtedness for borrowed money. DEI is also a party to the Q-Pipe Purchase Agreement, as guarantor for certain provisions regarding the Purchase Price Repayment Amount (as defined below) and other matters. Under the Q-Pipe Purchase Agreement, BHE delivered the Q-Pipe Cash Consideration of approximately $1.3 billion, which is included in other current assets on the Consolidated Balance Sheet as of December 31, 2020, to Dominion Questar on November 2, 2020. If the Q-Pipe Transaction does not close, Dominion Questar has agreed to repay all or (depending on the repayment date) substantially all of the Q-Pipe Cash Consideration (the "Purchase Price Repayment Amount") to BHE on or prior to December 31, 2021. If HSR Approval has not been obtained by June 30, 2021, upon BHE's written request, Dominion Questar will seek alternative buyers for all or a material portion of the Questar Pipeline Group (an "Alternative Transaction"). The Purchase Price Repayment Amount may be paid in cash or in shares of common stock, no par value, of DEI, or a combination thereof, subject to certain limitations as to stock repayments set forth in the Q-Pipe Purchase Agreement; provided any payment on or after December 15, 2021 must be paid in cash only. The assets acquired in the GT&S Transaction include (i) approximately 5,400 miles of operated natural gas transmission, gathering and storage pipelines with approximately 12.5 billion cubic feet ("Bcf") per day of design capacity; (ii) 420 Bcf of operated natural gas storage design capacity, of which 306 Bcf is owned by BHE GT&S; and (iii) a liquefied natural gas ("LNG") export, import and storage facility with LNG storage capacity of approximately 14.6 Bcfe. On October 29, 2020, BHE issued $3.75 billion of its 4.00% Perpetual Preferred Stock to certain subsidiaries of Berkshire Hathaway Inc. in order to fund the GT&S Cash Consideration and the Q-Pipe Cash Consideration. Included in BHE's Consolidated Statement of Operations within the BHE Pipeline Group reportable segment for the year ended December 31, 2020, is operating revenue and net income attributable to BHE shareholders of $331 million and $73 million, respectively, as a result of including BHE GT&S from November 1, 2020. Additionally, BHE incurred $9 million of direct transaction costs associated with the GT&S Transaction that are included in operating expense on the Consolidated Statement of Operations for the year ended December 31, 2020. Preliminary Allocation of Purchase Price BHE GT&S' assets acquired and liabilities assumed were measured at estimated fair value at closing. The majority of BHE GT&S' operations are subject to the rate-setting authority of the FERC and are accounted for pursuant to GAAP, including the authoritative guidance for regulated operations. The rate-setting and cost-recovery provisions provide for revenues derived from costs, including a return on investment of assets and liabilities included in rate base. As such, the fair value of BHE GT&S' assets acquired and liabilities assumed subject to these rate-setting provisions are assumed to approximate their carrying values and, therefore, no fair value adjustments have been reflected related to these amounts. The fair value of BHE GT&S' assets acquired and liabilities assumed not subject to the rate-setting provisions discussed above was determined using an income and cost approach. The income approach is based on significant estimates and assumptions, including Level 3 inputs, which are judgmental in nature. The estimates and assumptions include the projected timing and amount of future cash flows, discount rates reflecting the risk inherent in the future cash flows and future market prices. Additionally, the fair value of long-term debt assumed was determined based on quoted market prices, which is considered a Level 2 fair value measurement. The fair value of certain contracts and property, plant and equipment related to non-regulated operations, certain regulatory assets and other items included in rate base, an equity method investment and deferred income tax amounts are provisional and are subject to revision for up to 12 months following the acquisition date until the related valuations are completed. These items may be adjusted through regulatory assets or liabilities, to the extent recoverable in rates, or goodwill provided additional information is obtained about the facts and circumstances that existed as of the acquisition date. Such information includes, but is not limited to, the receipt of further information regarding the fair value of the contracts and property, plant and equipment related to non-regulated operations, the equity method investment and any associated deferred income tax amounts as well as the evolution of the rate-making process for regulated operations. The following table summarizes the preliminary fair values of the assets acquired and liabilities assumed as of the acquisition date (in millions): Fair Value Current assets, including cash and cash equivalents of $104 $ 569 Property, plant and equipment 9,254 Goodwill 1,732 Regulatory assets 108 Deferred income taxes 275 Other long-term assets 1,424 Total assets 13,362 Current liabilities, including current portion of long-term debt of $1,200 1,567 Long-term debt, less current portion 4,415 Regulatory liabilities 661 Other long-term liabilities 289 Total liabilities 6,932 Noncontrolling interest 3,916 Net assets acquired $ 2,514 Goodwill The excess of the purchase price paid over the estimated fair values of the identifiable assets acquired and liabilities assumed totaled $1.7 billion and is reflected as goodwill in the BHE Pipeline Group reportable segment. The goodwill reflects the value paid primarily for the long-term opportunity to improve operating results through the efficient management of operating expenses and the deployment of capital. Goodwill is not amortized, but rather is reviewed annually for impairment or more frequently if indicators of impairment exist. For income tax purposes, the GT&S Acquisition is treated as a deemed asset acquisition resulting from tax elections being made, therefore all tax goodwill is deductible. Due to book and tax basis differences of certain items, book and tax goodwill will differ. The amount of tax goodwill is approximately $0.9 billion and will be amortized over 15 years. Pro Forma Financial Information The following unaudited pro forma financial information reflects the consolidated results of operations of BHE and the amortization of the purchase price adjustments assuming the acquisition had taken place on January 1, 2019, excluding non-recurring transaction costs incurred by BHE during 2020 (in millions): 2020 2019 Operating revenue $ 22,581 $ 21,979 Net income attributable to BHE shareholders $ 6,800 $ 3,271
Goodwill Disclosure	Goodwill The excess of the purchase price paid over the estimated fair values of the identifiable assets acquired and liabilities assumed totaled $1.7 billion and is reflected as goodwill in the BHE Pipeline Group reportable segment. The goodwill reflects the value paid primarily for the long-term opportunity to improve operating results through the efficient management of operating expenses and the deployment of capital. Goodwill is not amortized, but rather is reviewed annually for impairment or more frequently if indicators of impairment exist. For income tax purposes, the GT&S Acquisition is treated as a deemed asset acquisition resulting from tax elections being made, therefore all tax goodwill is deductible. Due to book and tax basis differences of certain items, book and tax goodwill will differ. The amount of tax goodwill is approximately $0.9 billion and will be amortized over 15 years.

Business Acquisitions and Dispo

Business Acquisitions and Dispositions	12 Months Ended
	Dec. 31, 2020
Eastern Energy Gas Holdings, LLC [Member]
Business Acquisition [Line Items]
Business Acquisitions and Dispositions	Business Acquisitions and Dispositions Acquisition of Eastern Energy Gas by BHE In July 2020, DEI entered into an agreement to sell substantially all of its gas transmission and storage operations, including Eastern Energy Gas and a 25% limited partnership interest in Cove Point, to BHE. Approval of the transaction under the Hart-Scott-Rodino Act was not obtained within 75 days and DEI and BHE mutually agreed to a dual-phase closing consisting of two separate disposal groups identified as the GT&S Transaction and the proposed sale of the Questar Pipeline Group by DEI to BHE pursuant to a purchase and sale agreement entered into on October 5, 2020 ("Q-Pipe Transaction"). The Q-Pipe Transaction is currently anticipated to close in the first half of 2021, contingent on clearance or approval under the Hart-Scott-Rodino Act, and other customary closing and regulatory conditions. Prior to the completion of the GT&S Transaction, Eastern Energy Gas finalized a restructuring whereby Eastern Energy Gas distributed the Questar Pipeline Group and a 50% noncontrolling interest in Cove Point to DEI. This restructuring was accounted for by Eastern Energy Gas as a reorganization of entities under common control and the disposition was reflected as an equity transaction. The disposition was not reported as a discontinued operation as the disposal did not represent a strategic shift in the way management had intended to run the business. In November 2020, the GT&S Transaction was completed and Eastern Energy Gas, with the exception of the Questar Pipeline Group as discussed above, became an indirect wholly-owned subsidiary of BHE. DEI retained a 50% noncontrolling interest in Cove Point as well as the assets and obligations of the pension and other postretirement employee benefit plans associated with the operations sold and relating to services provided before closing. See Notes 11 and 14 for more information on the GT&S Transaction. Eastern Energy Gas recorded a distribution of net assets of $699 million, including goodwill of $185 million and $41 million of cash, for the distribution of the Questar Pipeline Group to DEI and recorded an approximately $2.8 billion increase in noncontrolling interests for DEI's retained 50% noncontrolling interest in Cove Point. Additionally, in accordance with the terms of the GT&S Transaction, DEI retained certain assets and liabilities associated with Eastern Energy Gas and settled all affiliated balances. As a result, Eastern Energy Gas recorded a contribution for the reset of deferred taxes of $1.3 billion, net of distributions of $895 million related to the pension and other postretirement employee benefit plans retained by DEI and $107 million related to the settlement of affiliated balances. Dominion Energy Gas Restructuring The acquisition of CPMLP Holdings Company, LLC (formerly known as Dominion Cove Point, LLC) ("DCP") and Eastern MLP Holding Company II, LLC (formerly known as Dominion MLP Holding Company II, LLC) ("DMLPHCII") from, and the disposition of the East Ohio Gas Company ("East Ohio") and Eastern Gathering and Processing, Inc. (formerly known as Dominion Gathering and Processing, Inc.) ("EGP") to, DEI by Eastern Energy Gas on November 6, 2019 ("Dominion Energy Gas Restructuring") was considered to be a reorganization of entities under common control. As a result, Eastern Energy Gas' basis in DCP and DMLPHCII, which included the general partner of Northeast Midstream Partners, LP (formerly known as Dominion Energy Midstream Partners, LP) ("Northeast Midstream"), a controlling 75% interest in Cove Point, Carolina Gas Transmission, LLC (formerly known as Dominion Energy Carolina Gas Transmission, LLC), Questar Pipeline Group, a 50% noncontrolling interest in White River Hub, LLC ("White River Hub") and a 25.93% noncontrolling interest in Iroquois, is equal to DEI's cost basis in the assets and liabilities of such entities since the applicable inception dates of common control. In November 2019, following completion of the Dominion Energy Gas Restructuring, DCP and DMLPHCII are wholly-owned subsidiaries of Eastern Energy Gas and therefore are consolidated by Eastern Energy Gas. The accompanying Consolidated Financial Statements and Notes of Eastern Energy Gas have been retrospectively adjusted to include the historical results and financial position of DCP and DMLPHCII. The 25% interest in Cove Point retained by DEI, and subsequently sold to Brookfield Super-Core Infrastructure Partners ("Brookfield") in December 2019, and the non-DEI held interest in Northeast Midstream (through January 2019) are reflected as noncontrolling interest. The Dominion Energy Gas Restructuring included the disposition of East Ohio and EGP by Eastern Energy Gas in November 2019. This restructuring represented a strategic shift in the operations of Eastern Energy Gas as Eastern Energy Gas' operations consist of LNG import/export and storage and regulated gas transmission and storage operations. As a result, the accompanying Consolidated Financial Statements and Notes of Eastern Energy Gas have been retrospectively adjusted to include the historical results and financial position of East Ohio and EGP as discontinued operations until November 2019. As the Dominion Energy Gas Restructuring was considered to be a reorganization of entities under common control, Eastern Energy Gas reflected the disposition as an equity transaction. The following table represents selected information regarding the results of operations of East Ohio, which are reported as discontinued operations in Eastern Energy Gas' Consolidated Statements of Operations (in millions): Period Ended Year Ended Operating revenue $ 594 $ 729 Depreciation and amortization 73 76 Other operating expenses 399 444 Other income (expense), net 28 35 Income tax expense 26 53 Net income from discontinued operations $ 124 $ 191 Capital expenditures and significant noncash items relating to East Ohio included the following (in millions): Period Ended Year Ended Capital expenditures $ 299 $ 352 Significant noncash items: Charge related to a voluntary retirement program 20 — Accrued capital expenditures 2 5 The following table represents selected information regarding the results of operations of EGP, which are reported as discontinued operations in Eastern Energy Gas' Consolidated Statements of Operations (in millions): Period Ended Year Ended Operating revenue $ 125 $ 220 Depreciation and amortization 4 15 Other operating expenses 97 425 Income tax expense (benefit) 7 (53) Net income (loss) from discontinued operations $ 17 $ (167) Capital expenditures and significant noncash items of EGP included the following (in millions): Period Ended Year Ended Capital expenditures $ 11 $ 6 Significant noncash items: Impairment of assets — (219)

Property, Plant and Equipment,

Property, Plant and Equipment, Net (Notes)	12 Months Ended
	Dec. 31, 2020
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Net [Text Block]	Property, Plant and Equipment, Net Property, plant and equipment, net consists of the following as of December 31 (in millions): Depreciable Life 2020 2019 Regulated assets: Utility generation, transmission and distribution systems 5-80 years $ 86,730 $ 81,127 Interstate natural gas pipeline assets 3-80 years 16,667 8,165 103,397 89,292 Accumulated depreciation and amortization (30,662) (26,353) Regulated assets, net 72,735 62,939 Nonregulated assets: Independent power plants 5-30 years 7,012 6,983 Other assets 3-40 years 5,659 1,834 12,671 8,817 Accumulated depreciation and amortization (2,586) (2,183) Nonregulated assets, net 10,085 6,634 Net operating assets 82,820 69,573 Construction work-in-progress 3,308 3,732 Property, plant and equipment, net $ 86,128 $ 73,305 Construction work-in-progress includes $3.2 billion and $3.6 billion as of December 31, 2020 and 2019, respectively, related to the construction of regulated assets.
MidAmerican Funding, LLC and Subsidiaries [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Net [Text Block]	Refer to Note 3 of MidAmerican Energy's Notes to Financial Statements. In addition to MidAmerican Energy's property, plant and equipment, net, MidAmerican Funding had nonregulated property gross of $— million and $3 million as of December 31, 2020 and 2019, respectively, and related accumulated depreciation and amortization of $— million and $1 million as of December 31, 2020 and 2019, respectively.
MidAmerican Energy Company [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Net [Text Block]	Property, plant and equipment, net consists of the following as of December 31 (in millions): Depreciable Life 2020 2019 Utility plant in service, net: Generation 20-70 years $ 16,980 $ 15,687 Transmission 52-75 years 2,365 2,124 Electric distribution 20-75 years 4,369 4,095 Natural gas distribution 29-75 years 1,955 1,820 Utility plant in service 25,669 23,726 Accumulated depreciation and amortization (6,902) (6,139) Utility plant in service, net 18,767 17,587 Nonregulated property, net: Nonregulated property gross 20-50 years 7 7 Accumulated depreciation and amortization (1) (1) Nonregulated property, net 6 6 18,773 17,593 Construction work-in-progress 506 782 Property, plant and equipment, net $ 19,279 $ 18,375 Nonregulated property, net consists primarily of land not recoverable for regulated utility purposes. The average depreciation and amortization rates applied to depreciable utility plant for the years ended December 31 were as follows: 2020 2019 2018 Electric 3.2 % 3.1 % 2.9 % Natural gas 2.8 % 2.8 % 2.8 %
Nevada Power Company [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Net [Text Block]	Property, Plant and Equipment, Net Property, plant and equipment, net consists of the following as of December 31 (in millions): Depreciable Life 2020 2019 Utility plant: Generation 30 - 55 years $ 3,690 $ 3,541 Transmission 45 - 70 years 1,468 1,444 Distribution 20 - 65 years 3,771 3,567 General and intangible plant 5 - 65 years 791 741 Utility plant 9,720 9,293 Accumulated depreciation and amortization (3,162) (2,951) Utility plant, net 6,558 6,342 Other non-regulated, net of accumulated depreciation and amortization 45 years 1 1 Plant, net 6,559 6,343 Construction work-in-progress 142 195 Property, plant and equipment, net $ 6,701 $ 6,538 Almost all of Nevada Power's plant is subject to the ratemaking jurisdiction of the PUCN and the FERC. Nevada Power's depreciation and amortization expense, as authorized by the PUCN, stated as a percentage of the depreciable property balances as of December 31, 2020, 2019 and 2018 was 3.1%, 3.3%, and 3.2%, respectively. Nevada Power is required to file a utility plant depreciation study every six years as a companion filing with the triennial general rate review filings. The most recent study was filed in 2017. Construction work-in-progress is primarily related to the construction of regulated assets.
Sierra Pacific Power Company [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Net [Text Block]	Property, Plant and Equipment, Net Property, plant and equipment, net consists of the following as of December 31 (in millions): Depreciable Life 2020 2019 Utility plant: Electric generation 25 - 60 years $ 1,130 $ 1,133 Electric transmission 50 - 100 years 908 840 Electric distribution 20 - 100 years 1,754 1,669 Electric general and intangible plant 5 - 70 years 189 178 Natural gas distribution 35 - 70 years 429 417 Natural gas general and intangible plant 5 - 70 years 15 14 Common general 5 - 70 years 355 338 Utility plant 4,780 4,589 Accumulated depreciation and amortization (1,755) (1,629) Utility plant, net 3,025 2,960 Other non-regulated, net of accumulated depreciation and amortization 70 years 2 2 Plant, net 3,027 2,962 Construction work-in-progress 137 113 Property, plant and equipment, net $ 3,164 $ 3,075 All of Sierra Pacific's plant is subject to the ratemaking jurisdiction of the PUCN and the FERC. Sierra Pacific's depreciation and amortization expense, as authorized by the PUCN, stated as a percentage of the depreciable property balances as of December 31, 2020, 2019 and 2018 was 3.2%, 3.1% and 3.1%, respectively. Sierra Pacific is required to file a utility plant depreciation study every six years as a companion filing with the triennial general rate review filings. The most recent study was filed in 2016. Construction work-in-progress is primarily related to the construction of regulated assets.
Eastern Energy Gas Holdings, LLC [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Net [Text Block]	Property, Plant and Equipment, Net Property, plant and equipment, net consists of the following as of December 31 (in millions): Depreciable Life 2020 2019 Utility Plant: Interstate natural gas pipeline assets 24 - 43 years $ 8,382 $ 10,025 Intangible plant 5 - 10 years 115 143 Utility plant in service 8,497 10,168 Accumulated depreciation and amortization (2,759) (3,414) Utility plant in service, net 5,738 6,754 Nonutility Plant: LNG facility 40 years 4,454 4,425 Intangible plant 14 years 25 25 Nonutility plant in service 4,479 4,450 Accumulated depreciation and amortization (283) (196) Nonutility plant in service, net 4,196 4,254 Plant, net 9,934 11,008 Construction work- in-progress 210 719 Property, plant and equipment, net $ 10,144 $ 11,727 Construction work-in-progress includes $196 million and $584 million as of December 31, 2020 and 2019, respectively, related to the construction of utility plant. EGP Gathering and Processing Assets In the fourth quarter of 2018, Eastern Energy Gas conducted a review of strategic alternatives of its remaining gathering and processing assets at EGP. Based on an evaluation of EGP's long-lived assets for recoverability under a probability weighted approach, Eastern Energy Gas determined the assets were impaired. As a result of this evaluation, Eastern Energy Gas recorded a charge of $219 million ($165 million after-tax) in discontinued operations in its Consolidated Statement of Operations to write-down EGP's property, plant and equipment to its estimated fair value of $190 million. The fair value of the property, plant and equipment was estimated using an income approach and market approach. The valuation is considered a Level 3 fair value measurement due to the use of significant judgmental and unobservable inputs, including projected timing and amount of future cash flows and discount rates reflecting risks inherent in the future cash flows and market prices. Assignments of Shale Development Rights In December 2013, Eastern Energy Gas closed on agreements with two natural gas producers to convey over time approximately 100,000 acres of Marcellus Shale development rights underneath several of its natural gas storage fields. The agreements provided for payments to Eastern Energy Gas, subject to customary adjustments, of approximately $200 million over a period of nine years, and an overriding royalty interest in gas produced from the acreage. In August 2017, Eastern Energy Gas and the natural gas producer signed an amendment to the agreement, which included the finalization of contractual matters on previous conveyances, the conveyance of Eastern Energy Gas' remaining 68% interest in approximately 70,000 acres and the elimination of Eastern Energy Gas' overriding royalty interest in gas produced from all acreage. Eastern Energy Gas received consideration of $65 million in September 2018 in connection with the final conveyance. As a result of this amendment, Eastern Energy Gas recognized in 2018 a $65 million ($47 million after-tax) gain included in operations and maintenance expense in the Consolidated Statement of Operations associated with the final conveyance of acreage. In November 2014, Eastern Energy Gas closed an agreement with a natural gas producer to convey over time approximately 24,000 acres of Marcellus Shale development rights underneath one of its natural gas storage fields. The agreement provided for payments to Eastern Energy Gas, subject to customary adjustments, of approximately $120 million over a period of four years, and an overriding royalty interest in gas produced from the acreage. In January 2018, Eastern Energy Gas and the natural gas producer closed on an amendment to the agreement, which included the conveyance of Eastern Energy Gas' remaining 50% interest in approximately 18,000 acres and the elimination of Eastern Energy Gas' overriding royalty interest in gas produced from all acreage. Eastern Energy Gas received proceeds of $28 million, resulting in an approximately $28 million ($20 million after-tax) gain recorded in operations and maintenance expense in the Consolidated Statement of Operations. In March 2018, Eastern Energy Gas closed an agreement with a natural gas producer to convey approximately 11,000 acres of Utica and Point Pleasant Shale development rights underneath one of its natural gas storage fields. The agreement provided for a payment to Eastern Energy Gas, subject to customary adjustments, of $16 million. In March 2018, Eastern Energy Gas received cash proceeds of $16 million associated with the conveyance of the acreage, resulting in a $16 million ($12 million after-tax) gain recorded in operations and maintenance expense in the Consolidated Statement of Operations. In June 2018, Eastern Energy Gas closed an amendment to an agreement with a natural gas producer for the elimination of Eastern Energy Gas' overriding royalty interest in gas produced from approximately 9,000 acres of Marcellus Shale development rights underneath one of its natural gas storage fields previously conveyed in December 2013. In June 2018, Eastern Energy Gas received proceeds of $6 million associated with the transaction, resulting in a $6 million ($4 million after-tax) gain recorded in operations and maintenance expense in the Consolidated Statement of Operations.

Jointly Owned Utility Facilitie

Jointly Owned Utility Facilities (Notes)	12 Months Ended
	Dec. 31, 2020
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Facilities [Text Block]	Jointly Owned Utility Facilities Under joint facility ownership agreements, the Domestic Regulated Businesses, as tenants in common, have undivided interests in jointly owned generation, transmission, distribution and pipeline common facilities. The Company accounts for its proportionate share of each facility and each joint owner has provided financing for its share of each facility. Operating costs of each facility are assigned to joint owners based on their percentage of ownership or energy production, depending on the nature of the cost. Operating costs and expenses on the Consolidated Statements of Operations include the Company's share of the expenses of these facilities. The amounts shown in the table below represent the Company's share in each jointly owned facility included in property, plant and equipment, net as of December 31, 2020 (dollars in millions): Accumulated Construction Company Facility In Depreciation and Work-in- Share Service Amortization Progress PacifiCorp: Jim Bridger Nos. 1-4 67 % $ 1,485 $ 714 $ 15 Hunter No. 1 94 486 203 1 Hunter No. 2 60 305 127 — Wyodak 80 476 254 2 Colstrip Nos. 3 and 4 10 255 145 6 Hermiston 50 184 93 2 Craig Nos. 1 and 2 19 368 305 — Hayden No. 1 25 75 42 — Hayden No. 2 13 44 25 — Transmission and distribution facilities Various 857 263 100 Total PacifiCorp 4,535 2,171 126 MidAmerican Energy: Louisa No. 1 88 % 853 483 2 Quad Cities Nos. 1 and 2 (1) 25 731 437 10 Walter Scott, Jr. No. 3 79 939 498 7 Walter Scott, Jr. No. 4 (2) 60 267 130 3 George Neal No. 4 41 318 179 3 Ottumwa No. 1 52 669 247 5 George Neal No. 3 72 524 262 2 Transmission facilities Various 261 101 — Total MidAmerican Energy 4,562 2,337 32 NV Energy: Navajo 11 % 10 4 — Valmy 50 390 291 1 Transmission facilities Various 70 31 1 On Line Transmission Line 25 160 27 1 Total NV Energy 630 353 3 BHE Pipeline Group: Ellisburg Pool 39 % 28 10 2 Ellisburg Station 50 25 7 1 Harrison 50 53 16 3 Leidy 50 133 44 3 Oakford 50 200 64 2 Common Facilities Various 277 165 — Total BHE Pipeline Group 716 306 11 Total $ 10,443 $ 5,167 $ 172 (1) Includes amounts related to nuclear fuel.
PacifiCorp [Member]
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Facilities [Text Block]	Jointly Owned Utility Facilities Under joint facility ownership agreements with other utilities, PacifiCorp, as a tenant in common, has undivided interests in jointly owned generation, transmission and distribution facilities. PacifiCorp accounts for its proportionate share of each facility, and each joint owner has provided financing for its share of each facility. Operating costs of each facility are assigned to joint owners based on their percentage of ownership or energy production, depending on the nature of the cost. Operating costs and expenses on the Consolidated Statements of Operations include PacifiCorp's share of the expenses of these facilities. The amounts shown in the table below represent PacifiCorp's share in each jointly owned facility included in property, plant and equipment, net as of December 31, 2020 (dollars in millions): Facility Accumulated Construction PacifiCorp in Depreciation and Work-in- Share Service Amortization Progress Jim Bridger Nos. 1 - 4 67 % $ 1,485 $ 714 $ 15 Hunter No. 1 94 486 203 1 Hunter No. 2 60 305 127 — Wyodak 80 476 254 2 Colstrip Nos. 3 and 4 10 255 145 6 Hermiston 50 184 93 2 Craig Nos. 1 and 2 19 368 305 — Hayden No. 1 25 75 42 — Hayden No. 2 13 44 25 — Transmission and distribution facilities Various 857 263 100 Total $ 4,535 $ 2,171 $ 126
MidAmerican Energy Company [Member]
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Facilities [Text Block]	Under joint facility ownership agreements with other utilities, MidAmerican Energy, as a tenant in common, has undivided interests in jointly owned generation and transmission facilities. MidAmerican Energy accounts for its proportionate share of each facility, and each joint owner has provided financing for its share of each facility. Operating costs of each facility are assigned to joint owners based on their percentage of ownership or energy production, depending on the nature of the cost. Operating expenses on the Statements of Operations include MidAmerican Energy's share of the expenses of these facilities. The amounts shown in the table below represent MidAmerican Energy's share in each jointly owned facility included in property, plant and equipment, net as of December 31, 2020 (dollars in millions): Accumulated Construction Company Plant in Depreciation and Work-in- Share Service Amortization Progress Louisa Unit No. 1 88 % $ 853 $ 483 $ 2 Quad Cities Unit Nos. 1 & 2 (1) 25 731 437 10 Walter Scott, Jr. Unit No. 3 79 939 498 7 Walter Scott, Jr. Unit No. 4 (2) 60 267 130 3 George Neal Unit No. 4 41 318 179 3 Ottumwa Unit No. 1 52 669 247 5 George Neal Unit No. 3 72 524 262 2 Transmission facilities Various 261 101 — Total $ 4,562 $ 2,337 $ 32 (1) Includes amounts related to nuclear fuel. (2) Plant in service and accumulated depreciation and amortization amounts are net of credits applied under Iowa regulatory arrangements totaling $509 million and $112 million, respectively.
MidAmerican Funding, LLC and Subsidiaries [Member]
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Facilities [Text Block]	Refer to Note 4 of MidAmerican Energy's Notes to Financial Statements.
Nevada Power Company [Member]
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Facilities [Text Block]	Jointly Owned Utility Facilities Under joint facility ownership agreements, Nevada Power, as tenants in common, has undivided interests in jointly owned generation and transmission facilities. Nevada Power accounts for its proportionate share of each facility and each joint owner has provided financing for its share of each facility. Operating costs of each facility are assigned to joint owners based on their percentage of ownership or energy production, depending on the nature of the cost. Operating costs and expenses on the Consolidated Statements of Operations include Nevada Power's share of the expenses of these facilities. The amounts shown in the table below represent Nevada Power's share in each jointly owned facility included in property, plant and equipment, net as of December 31, 2020 (dollars in millions): Nevada Construction Power's Utility Accumulated Work-in- Share Plant Depreciation Progress Navajo Generating Station (1) 11 % $ 10 $ 4 $ — ON Line Transmission Line 19 125 20 1 Other transmission facilities Various 66 29 — Total $ 201 $ 53 $ 1 (1) Represents Nevada Power's proportionate share of capitalized asset retirement costs to retire the Navajo Generating Station, which was shut down in November 2019.
Sierra Pacific Power Company [Member]
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Facilities [Text Block]	Jointly Owned Utility Facilities Under joint facility ownership agreements, Sierra Pacific, as tenants in common, has undivided interests in jointly owned generation and transmission facilities. Sierra Pacific accounts for its proportionate share of each facility and each joint owner has provided financing for its share of each facility. Operating costs of each facility are assigned to joint owners based on their percentage of ownership or energy production, depending on the nature of the cost. Operating costs and expenses on the Statements of Operations include Sierra Pacific's share of the expenses of these facilities. The amounts shown in the table below represent Sierra Pacific's share in each jointly owned facility included in property, plant and equipment, net as of December 31, 2020 (dollars in millions): Sierra Construction Pacific's Utility Accumulated Work-in- Share Plant Depreciation Progress Valmy Generating Station 50 % $ 390 $ 291 $ 1 ON Line Transmission Line 6 35 7 — Valmy Transmission 50 4 2 — Total $ 429 $ 300 $ 1
Eastern Energy Gas Holdings, LLC [Member]
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Facilities [Text Block]	Jointly Owned Utility Facilities Under joint facility ownership agreements with other utilities, Eastern Energy Gas, as a tenant in common, has undivided interests in jointly owned transmission and storage facilities. Eastern Energy Gas accounts for its proportionate share of each facility, and each joint owner has provided financing for its share of each facility. Operating costs of each facility are assigned to joint owners primarily based on their percentage of ownership. Operating costs and expenses on the Consolidated Statements of Operations include Eastern Energy Gas' share of the expenses of these facilities. The amounts shown in the table below represent Eastern Energy Gas' share in each jointly owned facility included in property, plant and equipment, net as of December 31, 2020 (dollars in millions): Facility Accumulated Construction Eastern Energy Gas' in Depreciation and Work-in- Share Service Amortization Progress Ellisburg Pool 39 % $ 28 $ 10 $ 2 Ellisburg Station 50 25 7 1 Harrison 50 53 16 3 Leidy 50 133 44 3 Oakford 50 200 64 2 Total $ 439 $ 141 $ 11

Leases (Notes)

Leases (Notes)	12 Months Ended
	Dec. 31, 2020
Lessee, Lease, Description [Line Items]
Lessee, Finance Leases [Text Block]	Leases The following table summarizes the Company's leases recorded on the Consolidated Balance Sheet (in millions): As of December 31, 2020 December 31, 2019 Right-of-use assets: Operating leases $ 517 $ 525 Finance leases 501 504 Total right-of-use assets $ 1,018 $ 1,029 Lease liabilities: Operating leases $ 569 $ 577 Finance leases 514 519 Total lease liabilities $ 1,083 $ 1,096 The following table summarizes the Company's lease costs (in millions): Years Ended December 31, 2020 December 31, 2019 Variable $ 592 $ 623 Operating 151 170 Finance: Amortization 18 16 Interest 40 41 Short-term 20 7 Total lease costs $ 821 $ 857 Weighted-average remaining lease term (years): Operating leases 7.4 7.6 Finance leases 27.5 28.8 Weighted-average discount rate: Operating leases 4.5 % 5.2 % Finance leases 8.5 % 8.6 % The following table summarizes the Company's supplemental cash flow information relating to leases (in millions): Years Ended December 31, 2020 December 31, 2019 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ (152) $ (153) Operating cash flows from finance leases (40) (42) Financing cash flows from finance leases (24) (19) Right-of-use assets obtained in exchange for lease liabilities: Operating leases $ 83 $ 82 Finance leases 19 14 The Company has the following remaining lease commitments as of (in millions): December 31, 2020 Operating Finance Total 2021 $ 152 $ 81 $ 233 2022 125 74 199 2023 93 63 156 2024 66 63 129 2025 50 62 112 Thereafter 199 673 872 Total undiscounted lease payments 685 1,016 1,701 Less - amounts representing interest (116) (502) (618) Lease liabilities $ 569 $ 514 $ 1,083
Lessee, Operating Leases [Text Block]	Leases The following table summarizes the Company's leases recorded on the Consolidated Balance Sheet (in millions): As of December 31, 2020 December 31, 2019 Right-of-use assets: Operating leases $ 517 $ 525 Finance leases 501 504 Total right-of-use assets $ 1,018 $ 1,029 Lease liabilities: Operating leases $ 569 $ 577 Finance leases 514 519 Total lease liabilities $ 1,083 $ 1,096 The following table summarizes the Company's lease costs (in millions): Years Ended December 31, 2020 December 31, 2019 Variable $ 592 $ 623 Operating 151 170 Finance: Amortization 18 16 Interest 40 41 Short-term 20 7 Total lease costs $ 821 $ 857 Weighted-average remaining lease term (years): Operating leases 7.4 7.6 Finance leases 27.5 28.8 Weighted-average discount rate: Operating leases 4.5 % 5.2 % Finance leases 8.5 % 8.6 % The following table summarizes the Company's supplemental cash flow information relating to leases (in millions): Years Ended December 31, 2020 December 31, 2019 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ (152) $ (153) Operating cash flows from finance leases (40) (42) Financing cash flows from finance leases (24) (19) Right-of-use assets obtained in exchange for lease liabilities: Operating leases $ 83 $ 82 Finance leases 19 14 The Company has the following remaining lease commitments as of (in millions): December 31, 2020 Operating Finance Total 2021 $ 152 $ 81 $ 233 2022 125 74 199 2023 93 63 156 2024 66 63 129 2025 50 62 112 Thereafter 199 673 872 Total undiscounted lease payments 685 1,016 1,701 Less - amounts representing interest (116) (502) (618) Lease liabilities $ 569 $ 514 $ 1,083
PacifiCorp [Member]
Lessee, Lease, Description [Line Items]
Lessee, Finance Leases [Text Block]	Leases The following table summarizes PacifiCorp's leases recorded on the Consolidated Balance Sheets as of December 31 (in millions): 2020 2019 Right-of-use assets: Operating leases $ 11 $ 12 Finance leases 17 19 Total right-of-use assets $ 28 $ 31 Lease liabilities: Operating leases $ 11 $ 12 Finance leases 17 19 Total lease liabilities $ 28 $ 31 The following table summarizes PacifiCorp's lease costs for the years ended December 31 (in millions): 2020 2019 Variable $ 60 $ 77 Operating 3 3 Finance: Amortization 2 1 Interest 2 2 Short-term 1 2 Total lease costs $ 68 $ 85 Weighted-average remaining lease term (years): Operating leases 13.9 14.0 Finance leases 8.4 9.1 Weighted-average discount rate: Operating leases 3.8 % 3.7 % Finance leases 10.5 % 10.6 % Cash payments associated with operating and finance lease liabilities approximated lease cost for the years ended December 31, 2020 and 2019. PacifiCorp has the following remaining lease commitments as of (in millions): December 31, 2020 Operating Finance Total 2021 $ 3 $ 7 $ 10 2022 2 3 5 2023 2 2 4 2024 1 2 3 2025 1 2 3 Thereafter 6 12 18 Total undiscounted lease payments 15 28 43 Less - amounts representing interest (4) (11) (15) Lease liabilities $ 11 $ 17 $ 28
Lessee, Operating Leases [Text Block]	Leases The following table summarizes PacifiCorp's leases recorded on the Consolidated Balance Sheets as of December 31 (in millions): 2020 2019 Right-of-use assets: Operating leases $ 11 $ 12 Finance leases 17 19 Total right-of-use assets $ 28 $ 31 Lease liabilities: Operating leases $ 11 $ 12 Finance leases 17 19 Total lease liabilities $ 28 $ 31 The following table summarizes PacifiCorp's lease costs for the years ended December 31 (in millions): 2020 2019 Variable $ 60 $ 77 Operating 3 3 Finance: Amortization 2 1 Interest 2 2 Short-term 1 2 Total lease costs $ 68 $ 85 Weighted-average remaining lease term (years): Operating leases 13.9 14.0 Finance leases 8.4 9.1 Weighted-average discount rate: Operating leases 3.8 % 3.7 % Finance leases 10.5 % 10.6 % Cash payments associated with operating and finance lease liabilities approximated lease cost for the years ended December 31, 2020 and 2019. PacifiCorp has the following remaining lease commitments as of (in millions): December 31, 2020 Operating Finance Total 2021 $ 3 $ 7 $ 10 2022 2 3 5 2023 2 2 4 2024 1 2 3 2025 1 2 3 Thereafter 6 12 18 Total undiscounted lease payments 15 28 43 Less - amounts representing interest (4) (11) (15) Lease liabilities $ 11 $ 17 $ 28
Nevada Power Company [Member]
Lessee, Lease, Description [Line Items]
Lessee, Finance Leases [Text Block]	Leases The following table summarizes Nevada Power's leases recorded on the Consolidated Balance Sheet as of December 31 (in millions): 2020 2019 Right-of-use assets: Operating leases $ 12 $ 13 Finance leases 351 441 Total right-of-use assets $ 363 $ 454 Lease liabilities: Operating leases $ 15 $ 17 Finance leases 361 454 Total lease liabilities $ 376 $ 471 The following table summarizes Nevada Power's lease costs for the years ended December 31 (in millions): 2020 2019 Variable $ 434 $ 434 Operating 3 3 Finance: Amortization 12 13 Interest 29 37 Total lease costs $ 478 $ 487 Weighted-average remaining lease term (years): Operating leases 6.5 7.5 Finance leases 28.7 30.6 Weighted-average discount rate: Operating leases 4.5 % 4.5 % Finance leases 8.6 % 8.7 % The following table summarizes Nevada Power's supplemental cash flow information relating to leases as of December 31 (in millions): 2020 2019 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ (3) $ (3) Operating cash flows from finance leases (34) (37) Financing cash flows from finance leases (15) (14) Right-of-use assets obtained in exchange for lease liabilities: Operating leases $ 1 $ — Finance leases 9 9 Nevada Power has the following remaining lease commitments as of (in millions): December 31, 2020 Operating Finance Total 2021 $ 3 $ 56 $ 59 2022 3 54 57 2023 2 43 45 2024 3 43 46 2025 3 43 46 Thereafter 4 491 495 Total undiscounted lease payments 18 730 748 Less - amounts representing interest (3) (369) (372) Lease liabilities $ 15 $ 361 $ 376 Operating and Finance Lease Obligations Nevada Power's lease obligation primarily consists of a transmission line One Nevada Transmission Line ("ON Line"), which was placed in-service on December 31, 2013. Nevada Power and Sierra Pacific, collectively the ("Nevada Utilities"), entered into a long-term transmission use agreement, in which the Nevada Utilities have a 25% interest and Great Basin Transmission South, LLC has a 75% interest. The Nevada Utilities' share of the long-term transmission use agreement and ownership interest is split at 75% for Nevada Power and 25% for Sierra Pacific, previously split 95% for Nevada Power and 5% for Sierra Pacific. In December 2019, the PUCN ordered the Nevada Utilities to complete the necessary procedures to change the ownership split to 75% for Nevada Power and 25% for Sierra Pacific, effective January 1, 2020. In August 2020, the FERC approved the amended agreement between the Nevada Utilities and Great Basin Transmission, LLC that reallocated the PUCN-approved ownership percentage change from Nevada Power to Sierra Pacific. The term of the lease is 41 years with the agreement ending December 31, 2054. Total ON Line finance lease obligations of $295 million and $385 million were included on the Consolidated Balance Sheets as of December 31, 2020 and 2019, respectively. See Note 2 for further discussion of Nevada Power's other lease obligations.
Lessee, Operating Leases [Text Block]	Leases The following table summarizes Nevada Power's leases recorded on the Consolidated Balance Sheet as of December 31 (in millions): 2020 2019 Right-of-use assets: Operating leases $ 12 $ 13 Finance leases 351 441 Total right-of-use assets $ 363 $ 454 Lease liabilities: Operating leases $ 15 $ 17 Finance leases 361 454 Total lease liabilities $ 376 $ 471 The following table summarizes Nevada Power's lease costs for the years ended December 31 (in millions): 2020 2019 Variable $ 434 $ 434 Operating 3 3 Finance: Amortization 12 13 Interest 29 37 Total lease costs $ 478 $ 487 Weighted-average remaining lease term (years): Operating leases 6.5 7.5 Finance leases 28.7 30.6 Weighted-average discount rate: Operating leases 4.5 % 4.5 % Finance leases 8.6 % 8.7 % The following table summarizes Nevada Power's supplemental cash flow information relating to leases as of December 31 (in millions): 2020 2019 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ (3) $ (3) Operating cash flows from finance leases (34) (37) Financing cash flows from finance leases (15) (14) Right-of-use assets obtained in exchange for lease liabilities: Operating leases $ 1 $ — Finance leases 9 9 Nevada Power has the following remaining lease commitments as of (in millions): December 31, 2020 Operating Finance Total 2021 $ 3 $ 56 $ 59 2022 3 54 57 2023 2 43 45 2024 3 43 46 2025 3 43 46 Thereafter 4 491 495 Total undiscounted lease payments 18 730 748 Less - amounts representing interest (3) (369) (372) Lease liabilities $ 15 $ 361 $ 376 Operating and Finance Lease Obligations Nevada Power's lease obligation primarily consists of a transmission line One Nevada Transmission Line ("ON Line"), which was placed in-service on December 31, 2013. Nevada Power and Sierra Pacific, collectively the ("Nevada Utilities"), entered into a long-term transmission use agreement, in which the Nevada Utilities have a 25% interest and Great Basin Transmission South, LLC has a 75% interest. The Nevada Utilities' share of the long-term transmission use agreement and ownership interest is split at 75% for Nevada Power and 25% for Sierra Pacific, previously split 95% for Nevada Power and 5% for Sierra Pacific. In December 2019, the PUCN ordered the Nevada Utilities to complete the necessary procedures to change the ownership split to 75% for Nevada Power and 25% for Sierra Pacific, effective January 1, 2020. In August 2020, the FERC approved the amended agreement between the Nevada Utilities and Great Basin Transmission, LLC that reallocated the PUCN-approved ownership percentage change from Nevada Power to Sierra Pacific. The term of the lease is 41 years with the agreement ending December 31, 2054. Total ON Line finance lease obligations of $295 million and $385 million were included on the Consolidated Balance Sheets as of December 31, 2020 and 2019, respectively. See Note 2 for further discussion of Nevada Power's other lease obligations.
Sierra Pacific Power Company [Member]
Lessee, Lease, Description [Line Items]
Lessee, Finance Leases [Text Block]	Leases The following table summarizes Sierra Pacific's leases recorded on the Balance Sheet as of December 31 (in millions): 2020 2019 Right-of-use assets: Operating leases $ 16 $ 17 Finance leases 126 43 Total right-of-use assets $ 142 $ 60 Lease liabilities: Operating leases $ 16 $ 17 Finance leases 130 45 Total lease liabilities $ 146 $ 62 The following table summarizes Sierra Pacific's lease costs for the years ended December 31 (in millions): 2020 2019 Variable $ 78 $ 69 Operating 2 1 Finance: Amortization 4 2 Interest 9 2 Total lease costs $ 93 $ 74 Weighted-average remaining lease term (years): Operating leases 27.2 26.3 Finance leases 27.8 20.9 Weighted-average discount rate: Operating leases 5.0 % 5.0 % Finance leases 8.1 % 7.1 % The following table summarizes Sierra Pacific's supplemental cash flow information relating to leases as of December 31 (in millions): 2020 2019 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ (2) $ (3) Operating cash flows from finance leases (6) (3) Financing cash flows from finance leases (5) (3) Right-of-use assets obtained in exchange for lease liabilities: Finance leases $ 89 $ 5 Sierra Pacific has the following remaining lease commitments as of (in millions): December 31, 2020 Operating Finance Total 2021 $ 2 $ 17 $ 19 2022 1 17 18 2023 1 17 18 2024 1 16 17 2025 1 16 17 Thereafter 25 170 195 Total undiscounted lease payments 31 253 284 Less - amounts representing interest (15) (123) (138) Lease liabilities $ 16 $ 130 $ 146 Operating and Finance Lease Obligations Sierra Pacific's operating and finance lease obligations consist mainly of ON Line and Truckee-Carson Irrigation District ("TCID"). ON Line was placed in-service on December 31, 2013. Sierra Pacific and Nevada Power, collectively the ("Nevada Utilities"), entered into a long-term transmission use agreement, in which the Nevada Utilities have a 25% interest and Great Basin Transmission South, LLC has a 75% interest. The Nevada Utilities' share of the long-term transmission use agreement and ownership interest is split at 75% for Nevada Power and 25% for Sierra Pacific, previously split 95% for Nevada Power and 5% for Sierra Pacific. In December 2019, the PUCN ordered the Nevada Utilities to complete the necessary procedures to change the ownership split to 75% for Nevada Power and 25% for Sierra Pacific, effective January 1, 2020. In August 2020, the FERC approved the amended agreement between the Nevada Utilities and Great Basin Transmission, LLC that reallocated the PUCN-approved ownership percentage change from Nevada Power to Sierra Pacific. The term of the lease is 41 years with the agreement ending December 31, 2054. In 1999, Sierra Pacific entered into a 50-year agreement with TCID to lease electric distribution facilities. Total finance lease obligations of $122 million and $35 million were included on the Consolidated Balance Sheets as of December 31, 2020 and 2019, respectively, for these leases. See Note 2 for further discussion of Sierra Pacific's remaining lease obligations.
Lessee, Operating Leases [Text Block]	Leases The following table summarizes Sierra Pacific's leases recorded on the Balance Sheet as of December 31 (in millions): 2020 2019 Right-of-use assets: Operating leases $ 16 $ 17 Finance leases 126 43 Total right-of-use assets $ 142 $ 60 Lease liabilities: Operating leases $ 16 $ 17 Finance leases 130 45 Total lease liabilities $ 146 $ 62 The following table summarizes Sierra Pacific's lease costs for the years ended December 31 (in millions): 2020 2019 Variable $ 78 $ 69 Operating 2 1 Finance: Amortization 4 2 Interest 9 2 Total lease costs $ 93 $ 74 Weighted-average remaining lease term (years): Operating leases 27.2 26.3 Finance leases 27.8 20.9 Weighted-average discount rate: Operating leases 5.0 % 5.0 % Finance leases 8.1 % 7.1 % The following table summarizes Sierra Pacific's supplemental cash flow information relating to leases as of December 31 (in millions): 2020 2019 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ (2) $ (3) Operating cash flows from finance leases (6) (3) Financing cash flows from finance leases (5) (3) Right-of-use assets obtained in exchange for lease liabilities: Finance leases $ 89 $ 5 Sierra Pacific has the following remaining lease commitments as of (in millions): December 31, 2020 Operating Finance Total 2021 $ 2 $ 17 $ 19 2022 1 17 18 2023 1 17 18 2024 1 16 17 2025 1 16 17 Thereafter 25 170 195 Total undiscounted lease payments 31 253 284 Less - amounts representing interest (15) (123) (138) Lease liabilities $ 16 $ 130 $ 146 Operating and Finance Lease Obligations Sierra Pacific's operating and finance lease obligations consist mainly of ON Line and Truckee-Carson Irrigation District ("TCID"). ON Line was placed in-service on December 31, 2013. Sierra Pacific and Nevada Power, collectively the ("Nevada Utilities"), entered into a long-term transmission use agreement, in which the Nevada Utilities have a 25% interest and Great Basin Transmission South, LLC has a 75% interest. The Nevada Utilities' share of the long-term transmission use agreement and ownership interest is split at 75% for Nevada Power and 25% for Sierra Pacific, previously split 95% for Nevada Power and 5% for Sierra Pacific. In December 2019, the PUCN ordered the Nevada Utilities to complete the necessary procedures to change the ownership split to 75% for Nevada Power and 25% for Sierra Pacific, effective January 1, 2020. In August 2020, the FERC approved the amended agreement between the Nevada Utilities and Great Basin Transmission, LLC that reallocated the PUCN-approved ownership percentage change from Nevada Power to Sierra Pacific. The term of the lease is 41 years with the agreement ending December 31, 2054. In 1999, Sierra Pacific entered into a 50-year agreement with TCID to lease electric distribution facilities. Total finance lease obligations of $122 million and $35 million were included on the Consolidated Balance Sheets as of December 31, 2020 and 2019, respectively, for these leases. See Note 2 for further discussion of Sierra Pacific's remaining lease obligations.
Eastern Energy Gas Holdings, LLC [Member]
Lessee, Lease, Description [Line Items]
Lessee, Finance Leases [Text Block]	Leases The following table summarizes Eastern Energy Gas' leases recorded on the Consolidated Balance Sheet (in millions): As of December 31, 2020 December 31, 2019 Right-of-use assets: Operating leases $ 31 $ 37 Finance leases 8 6 Total right-of-use assets $ 39 $ 43 Lease liabilities: Operating leases $ 29 $ 35 Finance leases 6 6 Total lease liabilities $ 35 $ 41 The following table summarizes Eastern Energy Gas' lease costs (in millions): Years Ended December 31, 2020 December 31, 2019 Operating $ 7 $ 7 Short-term 5 7 Total lease costs $ 12 $ 14 Weighted-average remaining lease term (years): Operating leases 11.5 11.2 Finance leases 4.7 5.6 Weighted-average discount rate: Operating leases 4.4 % 4.4 % Finance leases 2.6 % 4.1 % The following table summarizes Eastern Energy Gas' supplemental cash flow information relating to leases (in millions): Years Ended December 31, 2020 December 31, 2019 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 12 $ 14 Eastern Energy Gas has the following remaining lease commitments as of (in millions): December 31, 2020 Operating Finance Total 2021 $ 6 $ 2 $ 8 2022 5 2 7 2023 4 1 5 2024 2 1 3 2025 2 1 3 Thereafter 19 — 19 Total undiscounted lease payments $ 38 $ 7 $ 45 Less - amounts representing interest (9) (1) (10) Lease liabilities $ 29 $ 6 $ 35
Lessee, Operating Leases [Text Block]	Leases The following table summarizes Eastern Energy Gas' leases recorded on the Consolidated Balance Sheet (in millions): As of December 31, 2020 December 31, 2019 Right-of-use assets: Operating leases $ 31 $ 37 Finance leases 8 6 Total right-of-use assets $ 39 $ 43 Lease liabilities: Operating leases $ 29 $ 35 Finance leases 6 6 Total lease liabilities $ 35 $ 41 The following table summarizes Eastern Energy Gas' lease costs (in millions): Years Ended December 31, 2020 December 31, 2019 Operating $ 7 $ 7 Short-term 5 7 Total lease costs $ 12 $ 14 Weighted-average remaining lease term (years): Operating leases 11.5 11.2 Finance leases 4.7 5.6 Weighted-average discount rate: Operating leases 4.4 % 4.4 % Finance leases 2.6 % 4.1 % The following table summarizes Eastern Energy Gas' supplemental cash flow information relating to leases (in millions): Years Ended December 31, 2020 December 31, 2019 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 12 $ 14 Eastern Energy Gas has the following remaining lease commitments as of (in millions): December 31, 2020 Operating Finance Total 2021 $ 6 $ 2 $ 8 2022 5 2 7 2023 4 1 5 2024 2 1 3 2025 2 1 3 Thereafter 19 — 19 Total undiscounted lease payments $ 38 $ 7 $ 45 Less - amounts representing interest (9) (1) (10) Lease liabilities $ 29 $ 6 $ 35

Regulatory Matters (Notes)

Regulatory Matters (Notes)	12 Months Ended
	Dec. 31, 2020
Schedule Of Regulatory Assets and Liabilities [Line Items]
Regulatory Matters [Text Block]	Regulatory Matters Regulatory Assets Regulatory assets represent costs that are expected to be recovered in future regulated rates. The Company's regulatory assets reflected on the Consolidated Balance Sheets consist of the following as of December 31 (in millions): Weighted Average Remaining Life 2020 2019 Employee benefit plans (1) 15 years $ 722 $ 667 Asset retirement obligations 13 years 640 445 Asset disposition costs Various 347 391 Deferred income taxes (2) Various 283 223 Demand side management 10 years 197 9 Deferred net power costs 1 year 139 110 Deferred operating costs 11 years 124 134 Other Various 988 902 Total regulatory assets $ 3,440 $ 2,881 Reflected as: Current assets $ 283 $ 115 Noncurrent assets 3,157 2,766 Total regulatory assets $ 3,440 $ 2,881 (1) Represents amounts not yet recognized as a component of net periodic benefit cost that are expected to be included in regulated rates when recognized. (2) Amounts primarily represent income tax benefits related to certain property-related basis differences and other various differences that were previously passed on to customers and will be included in regulated rates when the temporary differences reverse. The Company had regulatory assets not earning a return on investment of $1.6 billion and $1.4 billion as of December 31, 2020 and 2019, respectively. Regulatory Liabilities Regulatory liabilities represent income to be recognized or amounts to be returned to customers in future periods. The Company's regulatory liabilities reflected on the Consolidated Balance Sheets consist of the following as of December 31 (in millions): Weighted Average Remaining Life 2020 2019 Deferred income taxes (1) Various $ 3,600 $ 3,611 Cost of removal (2) 26 years 2,435 2,370 Asset retirement obligations 31 years 305 241 Levelized depreciation 29 years 281 304 Other Various 854 785 Total regulatory liabilities $ 7,475 $ 7,311 Reflected as: Current liabilities $ 254 $ 211 Noncurrent liabilities 7,221 7,100 Total regulatory liabilities $ 7,475 $ 7,311 (1) Amounts primarily represent income tax liabilities related to the federal tax rate change from 35% to 21% that are probable to be passed on to customers, offset by income tax benefits related to certain property-related basis differences and other various differences that were previously passed on to customers and will be included in regulated rates when the temporary differences reverse. (2) Amounts represent estimated costs, as accrued through depreciation rates and exclusive of ARO liabilities, of removing regulated property, plant and equipment in accordance with accepted regulatory practices. Amounts are deducted from rate base or otherwise accrue a carrying cost.
PacifiCorp [Member]
Schedule Of Regulatory Assets and Liabilities [Line Items]
Regulatory Matters [Text Block]	Regulatory Matters Regulatory Assets Regulatory assets represent costs that are expected to be recovered in future rates. PacifiCorp's regulatory assets reflected on the Consolidated Balance Sheets consist of the following as of December 31 (in millions): Weighted Average Remaining Life 2020 2019 Employee benefit plans (1) 20 years $ 432 $ 422 Utah mine disposition (2) Various 117 125 Unamortized contract values 3 years 42 60 Deferred net power costs 1 year 78 106 Unrealized loss on derivative contracts 2 years 17 62 Asset retirement obligation 24 years 252 140 Demand side management (DSM) (3) 10 years 196 8 Other Various 261 200 Total regulatory assets $ 1,395 $ 1,123 Reflected as: Current assets $ 116 $ 63 Noncurrent assets 1,279 1,060 Total regulatory assets $ 1,395 $ 1,123 (1) Represents amounts not yet recognized as a component of net periodic benefit cost that are expected to be included in rates when recognized. (2) Amounts represent regulatory assets established as a result of the Utah mine disposition in 2015 for the United Mine Workers of America ("UMWA") 1974 Pension Plan withdrawal and closure costs incurred to date considered probable of recovery. (3) At December 31, 2019, DSM regulatory assets were substantially offset by amounts billed to Utah retail customers under the related Utah STEP program. In accordance with the Utah general rate case order issued in December 2020, $185 million of amounts billed to Utah customers under the Utah STEP program were used to accelerate depreciation of certain coal-fueled generation units as discussed in Note 3. PacifiCorp had regulatory assets not earning a return on investment of $707 million and $609 million as of December 31, 2020 and 2019, respectively. Regulatory Liabilities Regulatory liabilities represent income to be recognized or amounts to be returned to customers in future periods. PacifiCorp's regulatory liabilities reflected on the Consolidated Balance Sheets consist of the following as of December 31 (in millions): Weighted Average Remaining Life 2020 2019 Cost of removal (1) 26 years $ 1,125 $ 1,019 Deferred income taxes (2) Various 1,463 1,653 Other Various 254 297 Total regulatory liabilities $ 2,842 $ 2,969 Reflected as: Current liabilities $ 115 $ 56 Noncurrent liabilities 2,727 2,913 Total regulatory liabilities $ 2,842 $ 2,969 (1) Amounts represent estimated costs, as accrued through depreciation rates, of removing property, plant and equipment in accordance with accepted regulatory practices. Amounts are deducted from rate base or otherwise accrue a carrying cost. (2) Amounts primarily represent income tax liabilities related to the federal tax rate change from 35% to 21% that are probable of being passed on to customers, offset by income tax benefits related to certain property-related basis differences and other various differences that were previously passed on to customers and will be included in regulated rates when the temporary differences reverse.
MidAmerican Energy Company [Member]
Schedule Of Regulatory Assets and Liabilities [Line Items]
Regulatory Matters [Text Block]	Regulatory Assets Regulatory assets represent costs that are expected to be recovered in future regulated rates. MidAmerican Energy's regulatory assets reflected on the Balance Sheets consist of the following as of December 31 (in millions): Weighted Average Remaining Life 2020 2019 Asset retirement obligations (1) 6 years $ 298 $ 223 Employee benefit plans (2) 15 years 66 26 Unrealized loss on regulated derivative contracts 1 year — 7 Other Various 28 33 Total $ 392 $ 289 (1) Amount predominantly relates to AROs for fossil-fueled and wind-powered generating facilities. Refer to Note 11 for a discussion of AROs. (2) Represents amounts not yet recognized as a component of net periodic benefit cost that are expected to be included in regulated rates when recognized. MidAmerican Energy had regulatory assets not earning a return on investment of $389 million and $286 million as of December 31, 2020 and 2019, respectively. Regulatory Liabilities Regulatory liabilities represent amounts expected to be returned to customers in future periods. MidAmerican Energy's regulatory liabilities reflected on the Balance Sheets consist of the following as of December 31 (in millions): Weighted Average Remaining Life 2020 2019 Cost of removal accrual (1) 29 years $ 466 $ 572 Asset retirement obligations (2) 32 years 300 241 Deferred income taxes (3) Various 263 478 Pre-funded AFUDC on transmission MVPs (4) 52 years 35 35 Employee benefit plans (5) 9 years 20 32 Iowa electric revenue sharing accrual (6) 1 year — 22 Other Various 27 26 Total $ 1,111 $ 1,406 (1) Amounts represent estimated costs, as accrued through depreciation rates and exclusive of ARO liabilities, of removing utility plant in accordance with accepted regulatory practices. Amounts are deducted from rate base or otherwise accrue a carrying cost. (2) Amount represents the excess of nuclear decommission trust assets over the related ARO. Refer to Note 11 for a discussion of AROs. (3) Amounts primarily represent income tax liabilities primarily related to the federal tax rate change from 35% to 21% that are probable to be passed on to customers, offset by income tax benefits related to state accelerated tax depreciation and certain property-related basis differences that were previously passed on to customers and will be included in regulated rates when the temporary differences reverse. (4) Represents AFUDC accrued on transmission MVPs that is deducted from rate base as a result of the inclusion of related construction work-in-progress in rate base. (5) Represents amounts not yet recognized as a component of net periodic benefit cost that are to be returned to customers in future periods when recognized. (6) Represents current-year accruals under a regulatory arrangement in Iowa in which equity returns exceeding specified thresholds reduce utility plant upon final determination.
MidAmerican Funding, LLC and Subsidiaries [Member]
Schedule Of Regulatory Assets and Liabilities [Line Items]
Regulatory Matters [Text Block]	Refer to Note 5 of MidAmerican Energy's Notes to Financial Statements.
Nevada Power Company [Member]
Schedule Of Regulatory Assets and Liabilities [Line Items]
Regulatory Matters [Text Block]	Regulatory Matters Regulatory Assets Regulatory assets represent costs that are expected to be recovered in future rates. Nevada Power's regulatory assets reflected on the Consolidated Balance Sheets consist of the following as of December 31 (in millions): Weighted Average Remaining Life 2020 2019 Decommissioning costs (2) 3 years $ 230 $ 241 Deferred operating costs 9 years 119 136 Merger costs from 1999 merger 24 years 115 120 Asset retirement obligations 6 years 70 67 Employee benefit plans (1) 8 years 50 87 Legacy meters 12 years 45 49 ON Line deferrals 33 years 43 45 Deferred energy costs 1 year 39 — Abandoned projects None — 12 Other Various 83 44 Total regulatory assets $ 794 $ 801 Reflected as: Current assets $ 48 $ 1 Noncurrent assets 746 800 Total regulatory assets $ 794 $ 801 (1) Represents amounts not yet recognized as a component of net periodic benefit cost that are expected to be included in regulated rates when recognized. (2) Amount includes regulatory assets with an indeterminate life of $11 million and $104 million as of December 31, 2020 and 2019, respectively. Nevada Power had regulatory assets not earning a return on investment of $288 million and $303 million as of December 31, 2020 and 2019, respectively. The regulatory assets not earning a return on investment primarily consist of merger costs from the 1999 merger, AROs, deferred operating costs, a portion of the employee benefit plans, losses on reacquired debt and deferred energy costs. Regulatory Liabilities Regulatory liabilities represent amounts that are expected to be returned to customers in future periods. Nevada Power's regulatory liabilities reflected on the Consolidated Balance Sheets consist of the following as of December 31 (in millions): Weighted Average Remaining Life 2020 2019 Deferred income taxes (1) Various $ 647 $ 681 Cost of removal (2) 32 years 340 332 Impact fees (3) 2 years 54 72 Other Various 172 171 Total regulatory liabilities $ 1,213 $ 1,256 Reflected as: Current liabilities $ 50 $ 93 Noncurrent liabilities 1,163 1,163 Total regulatory liabilities $ 1,213 $ 1,256 (1) Amounts primarily represent income tax liabilities related to the federal tax rate change from 35% to 21% that are probable to be passed on to customers, offset by income tax benefits related to accelerated tax depreciation and certain property-related basis differences that were previously passed on to customers and will be included in regulated rates when the temporary differences reverse. (2) Amounts represent estimated costs, as accrued through depreciation rates and exclusive of ARO liabilities, of removing regulated property, plant and equipment in accordance with accepted regulatory practices. (3) Amounts reduce rate base or otherwise accrue a carrying cost. Deferred Energy Nevada statutes permit regulated utilities to adopt deferred energy accounting procedures. The intent of these procedures is to ease the effect on customers of fluctuations in the cost of purchased natural gas, fuel and electricity and are subject to annual prudency review by the PUCN. Under deferred energy accounting, to the extent actual fuel and purchased power costs exceed fuel and purchased power costs recoverable through current rates that excess is not recorded as a current expense on the Consolidated Statements of Operations but rather is deferred and recorded as a regulatory asset on the Consolidated Balance Sheets and would be included in the table above as deferred energy costs. Conversely, a regulatory liability is recorded to the extent fuel and purchased power costs recoverable through current rates exceed actual fuel and purchased power costs and is included in the table above as deferred energy costs. These excess amounts are reflected in quarterly adjustments to rates and recorded as cost of fuel, energy and capacity in future time periods. Regulatory Rate Review In June 2020, Nevada Power filed an electric regulatory rate review with the PUCN. The filing supported an annual revenue reduction of $96 million but requested an annual revenue reduction of $120 million. In September 2020, Nevada Power filed an all-party settlement for the electric regulatory rate review. The settlement resolved all but one issue and provided for an annual revenue reduction of $93 million and required Nevada Power to issue a $120 million one-time bill credit, composed primarily of existing regulatory liabilities, to customers beginning in October 2020. The continuation of the earning sharing mechanism was the one issue that was not addressed in the settlement. In October 2020, the PUCN held a hearing on the continuation of the earning sharing mechanism and issued an interim order accepting the settlement and requiring the one-time bill credit be issued to customers. The $120 million one-time bill credit was issued to customers in the fourth quarter of 2020. In December 2020, the PUCN issued a final order directing Nevada Power to continue the earning sharing mechanism subject to any modifications made to the earning sharing mechanism pursuant to an alternative rate-making ruling and to use the weather normalization methodology adopted for Sierra Pacific in its 2019 regulatory rate review. The new rates were effective on January 1, 2021. Natural Disaster Protection Plan In May 2019, Senate Bill 329 ("SB 329"), Natural Disaster Mitigation Measures, was signed into law, which requires Nevada Power to submit a natural disaster protection plan to the PUCN. The PUCN adopted natural disaster protection plan regulations in January 2020, that required Nevada Power to file their natural disaster protection plan for approval on or before March 1 of every third year. The regulations also require annual updates to be filed on or before September 1 of the second and third years of the plan. The plan must include procedures, protocols and other certain information as it relates to the efforts of Nevada Power to prevent or respond to a fire or other natural disaster. The expenditures incurred by Nevada Power in developing and implementing the natural disaster protection plan are required to be held in a regulatory asset account, with Nevada Power filing an application for recovery on or before March 1 of each year. Nevada Power submitted their initial natural disaster protection plan to the PUCN and filed their first application seeking recovery of 2019 expenditures in February 2020. In June 2020, a hearing was held and an order was issued in August 2020 that granted the joint application, made adjustments to the budget and approved the 2019 costs for recovery starting in October 2020. In October 2020, a modified final order was issued after Nevada Power and the Bureau of Consumer Protection filed for reconsideration. Intervenors have filed a petition for judicial review with the District Court in November 2020. In December 2020, the PUCN issued a second modified final order approving the natural disaster protection plan, as modified, and reopened its investigation and rulemaking on SB 329 to address rate design issues raised by intervenors. The comment period for the reopened investigation and rulemaking ended in early February 2021 and the matter is ongoing. 2017 Tax Reform In February 2018, Nevada Power made filings with the PUCN proposing a tax rate reduction rider for the lower annual income tax expense anticipated to result from 2017 Tax Reform for 2018 and beyond. In March 2018, the PUCN issued an order approving the rate reduction proposed by Nevada Power. The new rates were effective April 1, 2018. The order extended the procedural schedule to allow parties additional discovery relevant to 2017 Tax Reform and a hearing was held in July 2018. In September 2018, the PUCN issued an order directing Nevada Power to record the amortization of any excess protected accumulated deferred income tax arising from the 2017 Tax Reform as a regulatory liability effective January 1, 2018. Subsequently, Nevada Power filed a petition for reconsideration relating to the amortization of protected excess accumulated deferred income tax balances resulting from the 2017 Tax Reform. In November 2018, the PUCN issued an order granting reconsideration and reaffirming the September 2018 order. In December 2018, Nevada Power filed a petition for judicial review with the district court. The district court issued an order in March 2020 denying the petition and affirming the PUCN's order. In May 2020, Nevada Power filed a notice of appeal to the Nevada Supreme Court of the district court's order. Nevada Power agreed to withdraw the notice of appeal as a part of the Nevada Power electric regulatory rate review settlement. In December 2020, the PUCN issued a final order accepting the settlement. In January 2021, Nevada Power filed their withdrawal and the matter was dismissed by the court. Energy Efficiency Program Rates ("EEPR") and Energy Efficiency Implementation Rates ("EEIR") EEPR was established to allow Nevada Power to recover the costs of implementing energy efficiency programs and EEIR was established to offset the negative impacts on revenue associated with the successful implementation of energy efficiency programs. These rates change once a year in the utility's annual DEAA application based on energy efficiency program budgets prepared by Nevada Power and approved by the PUCN in integrated resource plan proceedings. When Nevada Power's regulatory earned rate of return for a calendar year exceeds the regulatory rate of return used to set base tariff general rates, it is obligated to refund energy efficiency implementation revenue previously collected for that year. In February 2020, Nevada Power filed an application to reset the EEIR and EEPR and to refund the EEIR revenue received in 2019, including carrying charges. In August 2020, the PUCN issued an order accepting a stipulation requiring Nevada Power to refund the 2019 revenue and reset the rates as filed effective October 1, 2020. The EEIR liability for Nevada Power is $8 million, which is included in current regulatory liabilities on the Consolidated Balance Sheets as of December 31, 2020 and 2019. Emissions Reduction and Capacity Retirement Plan ("ERCR Plan") In November 2019, the Navajo coal-fueled generating facility was retired. Nevada Power owned 11% of the facility and its net owned capacity was 255 MWs. The decommissioning was approved by the PUCN in May 2014 as a part of the filed ERCR Plan. The remaining net book value of $12 million was moved from property, plant and equipment, net to noncurrent regulatory assets on the Consolidated Balance Sheet in November 2019, in compliance with the ERCR Plan. Refer to Note 13 for additional information on the ERCR Plan.
Sierra Pacific Power Company [Member]
Schedule Of Regulatory Assets and Liabilities [Line Items]
Regulatory Matters [Text Block]	Regulatory Matters Regulatory Assets Regulatory assets represent costs that are expected to be recovered in future rates. Sierra Pacific's regulatory assets reflected on the Balance Sheets consist of the following as of December 31 (in millions): Weighted Average Remaining Life 2020 2019 Employee benefit plans (1) 8 years $ 81 $ 107 Merger costs from 1999 merger 26 years 68 71 Natural disaster protection plan 1 year 45 8 Deferred operating costs 11 years 27 23 Abandoned projects 6 years 22 24 Deferred energy costs 1 year 22 4 Losses on reacquired debt 15 years 15 17 Other Various 54 41 Total regulatory assets $ 334 $ 295 Reflected as: Current assets $ 67 $ 12 Noncurrent assets 267 283 Total regulatory assets $ 334 $ 295 (1) Represents amounts not yet recognized as a component of net periodic benefit cost that are expected to be included in regulated rates when recognized. Sierra Pacific had regulatory assets not earning a return on investment of $149 million and $168 million as of December 31, 2020 and 2019, respectively. The regulatory assets not earning a return on investment primarily consist of merger costs from the 1999 merger, a portion of the employee benefit plans, losses on reacquired debt, AROs and legacy meters. Regulatory Liabilities Regulatory liabilities represent amounts that are expected to be returned to customers in future periods. Sierra Pacific's regulatory liabilities reflected on the Balance Sheets consist of the following as of December 31 (in millions): Weighted Average Remaining Life 2020 2019 Deferred income taxes (1) Various $ 249 $ 263 Cost of removal (2) 37 years 197 217 Other Various 51 58 Total regulatory liabilities $ 497 $ 538 Reflected as: Current liabilities $ 34 $ 49 Noncurrent liabilities 463 489 Total regulatory liabilities $ 497 $ 538 (1) Amounts primarily represent income tax liabilities related to the federal tax rate change from 35% to 21% that are probable to be passed on to customers, offset by income tax benefits related to accelerated tax depreciation and certain property-related basis differences and other various differences that were previously passed on to customers and will be included in regulated rates when the temporary differences reverse. (2) Amounts represent estimated costs, as accrued through depreciation rates and exclusive of ARO liabilities, of removing regulated property, plant and equipment in accordance with accepted regulatory practices. Deferred Energy Nevada statutes permit regulated utilities to adopt deferred energy accounting procedures. The intent of these procedures is to ease the effect on customers of fluctuations in the cost of purchased natural gas, fuel and electricity and are subject to annual prudency review by the PUCN. Under deferred energy accounting, to the extent actual fuel and purchased power costs exceed fuel and purchased power costs recoverable through current rates that excess is not recorded as a current expense on the Statements of Operations but rather is deferred and recorded as a regulatory asset on the Balance Sheets and would be included in the table above as deferred energy costs. Conversely, a regulatory liability is recorded to the extent fuel and purchased power costs recoverable through current rates exceed actual fuel and purchased power costs and is included in the table above as deferred energy costs. These excess amounts are reflected in quarterly adjustments to rates and recorded as cost of fuel, energy and capacity in future time periods. Regulatory Rate Review In June 2019, Sierra Pacific filed an electric regulatory rate review with the PUCN. The filing supported an annual revenue increase of $5 million but requested an annual revenue reduction of $5 million. In September 2019, Sierra Pacific filed an all-party settlement for the electric regulatory rate review. The settlement resolves all cost of capital and revenue requirement issues and provides for an annual revenue reduction of $5 million and requires Sierra Pacific to share 50% of regulatory earnings above 9.7% with its customers. The rate design portion of the regulatory rate review was not a part of the settlement and a hearing on rate design was held in November 2019. In December 2019, the PUCN issued an order approving the stipulation but made some adjustments to the methodology for the weather normalization component of historical sales in rates, which resulted in an annual revenue reduction of $3 million. The new rates were effective January 1, 2020. In January 2020, Sierra Pacific filed a petition for rehearing challenging the PUCN's adjustments to the weather normalization methodology. In February 2020, the PUCN issued an order granting the petition for rehearing. In April 2020, the PUCN issued a final order approving a weather normalization methodology that changed the additional annual revenue reduction from $3 million to $2 million with an effective date of January 1, 2020. Customers billed under rates using the initial revenue reduction were issued credits in the fourth quarter of 2020. Natural Disaster Protection Plan In May 2019, Senate Bill 329 ("SB 329"), Natural Disaster Mitigation Measures, was signed into law, which requires Sierra Pacific to submit a natural disaster protection plan to the PUCN. The PUCN adopted natural disaster protection plan regulations in January 2020, that required Sierra Pacific to file their natural disaster protection plan for approval on or before March 1 of every third year. The regulations also require annual updates to be filed on or before September 1 of the second and third years of the plan. The plan must include procedures, protocols and other certain information as it relates to the efforts of Sierra Pacific to prevent or respond to a fire or other natural disaster. The expenditures incurred by Sierra Pacific in developing and implementing the natural disaster protection plan are required to be held in a regulatory asset account, with Sierra Pacific filing an application for recovery on or before March 1 of each year. Sierra Pacific submitted their initial natural disaster protection plan to the PUCN and filed their first application seeking recovery of 2019 expenditures in February 2020. In June 2020, a hearing was held and an order was issued in August 2020 that granted the joint application, made adjustments to the budget and approved the 2019 costs for recovery starting in October 2020. In October 2020, a modified final order was issued after Sierra Pacific and the Bureau of Consumer Protection filed for reconsideration. Intervenors have filed a petition for judicial review with the District Court in November 2020. In December 2020, the PUCN issued a second modified final order approving the natural disaster protection plan, as modified, and reopened its investigation and rulemaking on SB 329 to address rate design issues raised by intervenors. The comment period for the reopened investigation and rulemaking ended in early February 2021 and the matter is ongoing. 2017 Tax Reform In February 2018, Sierra Pacific made filings with the PUCN proposing a tax rate reduction rider for the lower annual income tax expense anticipated to result from 2017 Tax Reform for 2018 and beyond. In March 2018, the PUCN issued an order approving the rate reduction proposed by Sierra Pacific. The new rates were effective April 1, 2018. The order extended the procedural schedule to allow parties additional discovery relevant to 2017 Tax Reform and a hearing was held in July 2018. In September 2018, the PUCN issued an order directing Sierra Pacific to record the amortization of any excess protected accumulated deferred income tax arising from the 2017 Tax Reform as a regulatory liability effective January 1, 2018. Subsequently, Sierra Pacific filed a petition for reconsideration relating to the amortization of protected excess accumulated deferred income tax balances resulting from the 2017 Tax Reform. In November 2018, the PUCN issued an order granting reconsideration and reaffirming the September 2018 order. In December 2018, Sierra Pacific filed a petition for judicial review with the district court. The district court issued an order in March 2020 denying the petition and affirming the PUCN's order. In May 2020, Sierra Pacific filed a notice of appeal to the Nevada Supreme Court of the district court's order. Sierra Pacific agreed to withdraw the notice of appeal as a part of the Nevada Power electric regulatory rate review settlement. In December 2020, the PUCN issued a final order accepting the settlement. In January 2021, Sierra Pacific filed their withdrawal and the matter was dismissed by the court. Energy Efficiency Program Rates ("EEPR") and Energy Efficiency Implementation Rates ("EEIR") EEPR was established to allow Sierra Pacific to recover the costs of implementing energy efficiency programs and EEIR was established to offset the negative impacts on revenue associated with the successful implementation of energy efficiency programs. These rates change once a year in the utility's annual DEAA application based on energy efficiency program budgets prepared by Sierra Pacific. When Sierra Pacific's regulatory earned rate of return for a calendar year exceeds the regulatory rate of return used to set base tariff general rates, it is obligated to refund energy efficiency implementation revenue previously collected for that year. In February 2020, Sierra Pacific filed an application to reset the EEIR and EEPR and to refund the EEIR revenue received in 2019, including carrying charges. In August 2020, the PUCN issued an order accepting a stipulation requiring Sierra Pacific to refund the 2019 revenue and reset the rates as filed effective October 1, 2020.The EEIR liability for Sierra Pacific is $2 million, which is included in current regulatory liabilities on the Balance Sheets as of December 31, 2020 and 2019.
Eastern Energy Gas Holdings, LLC [Member]
Schedule Of Regulatory Assets and Liabilities [Line Items]
Regulatory Matters [Text Block]	Regulatory Matters Regulatory Assets Regulatory assets represent costs that are expected to be recovered in future regulated rates. Eastern Energy Gas' regulatory assets reflected on the Consolidated Balance Sheets consist of the following as of December 31 (in millions): Weighted Average Remaining Life 2020 2019 Employee benefit plans (1) Various $ 70 $ — Interest rate hedges (2) Various — 32 Other Various 12 16 Total regulatory assets $ 82 $ 48 Reflected as: Current assets $ 8 $ 8 Noncurrent assets 74 40 Total regulatory assets $ 82 $ 48 (1) Represents costs expected to be recovered through future rates generally over the expected remaining service period of plan participants by certain rate-regulated subsidiaries. (2) Reflects interest rate hedges recoverable from or refundable to customers. Certain of these instruments are settled and any related payments are being amortized into interest expense over the life of the related debt. Eastern Energy Gas had regulatory assets not earning a return on investment of $10 million and $46 million as of December 31, 2020 and 2019, respectively. Regulatory Liabilities Regulatory liabilities represent income to be recognized or amounts expected to be returned to customers in future periods. Eastern Energy Gas' regulatory liabilities reflected on the Consolidated Balance Sheets consist of the following as of December 31 (in millions): Weighted Average Remaining Life 2020 2019 Income taxes refundable through future rates (1) Various $ 473 $ 560 Other postretirement benefit costs (2) Various 115 133 Provision for future cost of removal and AROs (3) Various 89 113 Other Various 32 35 Total regulatory liabilities $ 709 $ 841 Reflected as: Current liabilities $ 40 $ 41 Noncurrent liabilities 669 800 Total regulatory liabilities $ 709 $ 841 (1) Amounts primarily represent income tax liabilities related to the federal tax rate change from 35% to 21% that are probable to be passed on to customers, offset by income tax benefits related to certain property-related basis differences and other various differences that were previously passed on to customers and will be included in regulated rates when the temporary differences reverse. (2) Reflects a regulatory liability for the collection of postretirement benefit costs allowed in rates in excess of expense incurred. (3) Rates charged to customers by Eastern Energy Gas' regulated businesses include a provision for the cost of future activities to remove assets that are expected to be incurred at the time of retirement. Regulatory Matters Eastern Gas Transmission and Storage, Inc. In July 2017, the FERC audit staff communicated to Eastern Gas Transmission and Storage, Inc. ("EGTS") that it had substantially completed an audit of EGTS' compliance with the accounting and reporting requirements of the FERC's Uniform System of Accounts and provided a description of matters and preliminary recommendations. In November 2017, the FERC audit staff issued its audit report. In December 2017, EGTS provided its response to the audit report. EGTS requested FERC review of the contested findings and submitted its plan for compliance with the uncontested portions of the report. EGTS reached resolution of certain matters with the FERC in the fourth quarter of 2018. EGTS recognized a charge of $129 million ($94 million after-tax) recorded primarily within operations and maintenance expense in the Consolidated Statement of Operations for the year ended December 31, 2018 for a disallowance of plant, originally established beginning in 2012, for the resolution of one matter with the FERC. In December 2020, the FERC issued a final ruling on the remaining matter, which resulted in a $43 million ($31 million after-tax) charge for disallowance of capitalized AFUDC, recorded within operations and maintenance expense in the Consolidated Statement of Operations. As a condition of the December 2020 ruling, EGTS will file its proposed accounting entries and supporting documentation with the FERC by the second quarter of 2021; however, EGTS does not expect a material change from the charge recognized. In December 2014, EGTS entered into a precedent agreement with Atlantic Coast Pipeline, LLC ("Atlantic Coast Pipeline") for the project previously intended for EGTS to provide approximately 1,500,000 decatherms ("Dth") of firm transportation service to various customers in connection with the Atlantic Coast Pipeline project ("Supply Header Project"). As a result of the cancellation of the Atlantic Coast Pipeline project, in the second quarter of 2020 Eastern Energy Gas recorded a charge of $482 million ($359 million after-tax) in operations and maintenance expense in its Consolidated Statement of Operations associated with the probable abandonment of a significant portion of the project as well as the establishment of a $75 million ARO. In the third quarter of 2020, Eastern Energy Gas recorded an additional charge of $10 million ($7 million after-tax) associated with the probable abandonment of a significant portion of the project and a $29 million ($20 million after-tax) benefit from a revision to the previously established ARO, both of which were recorded in operations and maintenance expense in Eastern Energy Gas' Consolidated Statement of Operations. As EGTS evaluates its future use, approximately $40 million remains within property, plant and equipment for a potential modified project. In December 2019, EGTS filed an application to request FERC authorization to construct, operate and maintain the Tri-West project to provide 120,000 Dths per day of firm transportation service from Pennsylvania to Ohio for delivery to Tennessee Gas Pipeline Company, L.L.C. The application was automatically approved after a 60-day waiting period from the date of filing and the project commenced commercial operations in August 2020 at a cost of $17 million. In January 2018, EGTS filed an application to request FERC authorization to construct and operate certain facilities located in Ohio and Pennsylvania for the Sweden Valley project. In June 2019, EGTS withdrew its application for the project due to certain regulatory delays. As a result of the project abandonment, during the second quarter of 2019, EGTS recorded a charge of $13 million ($10 million after-tax), included in operations and maintenance expenses in the Consolidated Statement of Operations. Cove Point In June 2015, Cove Point executed two binding precedent agreements for the approximately $150 million project to provide 150,000 Dths per day of transportation service to help meet demand for natural gas for Washington Gas Light Company ("Eastern Market Access Project"). In January 2018, Cove Point received FERC authorization to construct and operate the project facilities. In October 2018, Cove Point announced it was evaluating alternatives to a proposed Charles County, Maryland compressor station that was initially part of this project and in December 2018, after working with project customers for alternative solutions, decided not to pursue further construction at this location resulting in a revised project estimate of approximately $45 million and a write-off of $37 million ($28 million after-tax). In May 2019, Cove Point filed an application for an amendment to vacate its FERC authorization for the Charles County, Maryland compressor station and revised its project scope. In August 2019, Cove Point received FERC authorization and the Eastern Market Access Project commenced commercial operations in September 2019. In January 2020, pursuant to the terms of a previous settlement, Cove Point filed a general rate case for its FERC-jurisdictional services, with proposed rates to be effective March 1, 2020. Cove Point proposed an annual cost-of-service of approximately $182 million. In February 2020, FERC approved suspending the changes in rates for five months following the proposed effective date, until August 1, 2020, subject to refund. In November 2020, Cove Point reached an agreement in principle with the active participants in the general rate case proceeding. Under the terms of the agreement in principle, Cove Point's rates effective August 1, 2020 result in an increase to annual revenues of approximately $4 million and a decrease in annual depreciation expense of approximately $1 million, compared to the rates in effect prior to August 1, 2020. The interim settlement rates were implemented November 1, 2020, and Cove Point's provision for rate refunds for August 2020 through October 2020 totaled $7 million. The agreement in principle was reflected in a stipulation and agreement filed with the FERC in January 2021, which is subject to final approval by the FERC.

Investments and Restricted Cash

Investments and Restricted Cash and Investments (Notes)	12 Months Ended
	Dec. 31, 2020
Investments, Including Equity Method And Restricted Cash And Investments [Line Items]
Investments and Restricted Cash and Investments [Text Block]	Investments and Restricted Cash and Cash Equivalents and Investments Investments and restricted cash and cash equivalents and investments consists of the following as of December 31 (in millions): 2020 2019 Investments: BYD Company Limited common stock $ 5,897 $ 1,122 Rabbi trusts 440 410 Other 263 187 Total investments 6,600 1,719 Equity method investments: BHE Renewables tax equity investments 5,626 3,130 Electric Transmission Texas, LLC 594 555 Iroquois Gas Transmission System, L.P. 580 — JAX LNG, LLC 75 — Bridger Coal Company 74 81 Other 118 181 Total equity method investments 7,067 3,947 Restricted cash and cash equivalents and investments: Quad Cities Station nuclear decommissioning trust funds 676 599 Other restricted cash and cash equivalents 155 230 Total restricted cash and cash equivalents and investments 831 829 Total investments and restricted cash and cash equivalents and investments $ 14,498 $ 6,495 Reflected as: Other current assets $ 178 $ 240 Noncurrent assets 14,320 6,255 Total investments and restricted cash and cash equivalents and investments $ 14,498 $ 6,495 Investments BHE's investment in BYD Company Limited common stock is accounted for as a marketable security with changes in fair value recognized in net income. Rabbi trusts primarily hold corporate-owned life insurance on certain current and former key executives and directors. The Rabbi trusts were established to hold investments used to fund the obligations of various nonqualified executive and director compensation plans and to pay the costs of the trusts. The amount represents the cash surrender value of all of the policies included in the Rabbi trusts, net of amounts borrowed against the cash surrender value. Gains (losses) on marketable securities, net recognized during the period consists of the following (in millions): Years Ended December 31, 2020 2019 Unrealized gains (losses) recognized on marketable securities still held at the reporting date $ 4,791 $ (290) Net gains recognized on marketable securities sold during the period 6 2 Gains (losses) on marketable securities, net $ 4,797 $ (288) Equity Method Investments The Company has invested in projects sponsored by third parties, commonly referred to as tax equity investments. Under the terms of these tax equity investments, the Company has entered into equity capital contribution agreements with the project sponsors that require contributions. The Company has made contributions of $2,736 million, $1,619 million and $698 million in 2020, 2019 and 2018, respectively, and has commitments as of December 31, 2020, subject to satisfaction of certain specified conditions, to provide equity contributions of $563 million in 2021 pursuant to these equity capital contribution agreements as the various projects achieve commercial operation. Once a project achieves commercial operation, the Company enters into a partnership agreement with the project sponsor that directs and allocates the operating profits and tax benefits from the project. BHE, through a subsidiary, owns 50% of Electric Transmission Texas, LLC, which owns and operates electric transmission assets in the Electric Reliability Council of Texas footprint. BHE, through a subsidiary, owns 50% of Iroquois, which owns and operates an interstate natural gas pipeline located in the states of New York and Connecticut and 50% of JAX LNG, LLC, which is an LNG supplier in Florida serving the growing marine and truck LNG markets. BHE, through a subsidiary, owns 66.67% of Bridger Coal Company ("Bridger Coal"), which is a coal mining joint venture that supplies coal to the Jim Bridger Nos. 1-4 generating facility. Bridger Coal is being accounted for under the equity method of accounting as the power to direct the activities that most significantly impact Bridger Coal's economic performance are shared with the joint venture partner. Restricted Investments MidAmerican Energy has established a trust for the investment of funds for decommissioning the Quad Cities Nuclear Station Units 1 and 2 ("Quad Cities Station"). These investments in debt and equity securities are reported at fair value. Funds are invested in the trust in accordance with applicable federal and state investment guidelines and are restricted for use as reimbursement for costs of decommissioning the Quad Cities Station, which are currently licensed for operation until December 2032.
MidAmerican Energy Company [Member]
Investments, Including Equity Method And Restricted Cash And Investments [Line Items]
Investments and Restricted Cash and Investments [Text Block]	Investments and restricted investments consists of the following amounts as of December 31 (in millions): 2020 2019 Nuclear decommissioning trust $ 676 $ 599 Rabbi trusts 211 203 Other 24 16 Total $ 911 $ 818 MidAmerican Energy has established a trust for the investment of funds for decommissioning the Quad Cities Station. The debt and equity securities in the trust are reported at fair value. Funds are invested in the trust in accordance with applicable federal and state investment guidelines and are restricted for use as reimbursement for costs of decommissioning the Quad Cities Station, which is currently licensed for operation until December 2032. As of December 31, 2020 and 2019, the fair value of the trust's funds was invested as follows: 56% and 56%, respectively, in domestic common equity securities, 30% and 31%, respectively, in United States government securities, 11% and 10%, respectively, in domestic corporate debt securities and 3% and 3%, respectively, in other securities. Rabbi trusts primarily hold corporate-owned life insurance on certain current and former key executives and directors. The Rabbi trusts were established to hold investments used to fund the obligations of various nonqualified executive and director compensation plans and to pay the costs of the trusts. The amount represents the cash surrender value of all of the policies included in the Rabbi trusts, net of amounts borrowed against the cash surrender value. Changes in the cash surrender value of the policies are reflected in other income (expense) - other, net on the Statements of Operation.
MidAmerican Funding, LLC and Subsidiaries [Member]
Investments, Including Equity Method And Restricted Cash And Investments [Line Items]
Investments and Restricted Cash and Investments [Text Block]	Refer to Note 6 of MidAmerican Energy's Notes to Financial Statements in Item 8 of this Form 10-K. In addition to MidAmerican Energy's investments and restricted investments, MHC had corporate-owned life insurance policies in a Rabbi trust owned by MHC with a total cash surrender value of $2 million as of December 31, 2020 and 2019.
Eastern Energy Gas Holdings, LLC [Member]
Investments, Including Equity Method And Restricted Cash And Investments [Line Items]
Investments and Restricted Cash and Investments [Text Block]	Investments and Restricted Cash and Cash Equivalents Investments and restricted cash and cash equivalents consists of the following as of December 31 (in millions): December 31, 2020 December 31, 2019 Equity method investments: Iroquois $ 244 $ 276 White River Hub — 36 Total investments 244 312 Restricted cash and cash equivalents: Customer deposits 13 12 Total restricted cash and cash equivalents 13 12 Total investments and restricted cash and cash equivalents $ 257 $ 324 Reflected as: Current assets $ 13 $ 12 Noncurrent assets 244 312 Total investments and restricted cash and cash equivalents $ 257 $ 324 Equity Method Investments Eastern Energy Gas, through a subsidiary, owns 50% of Iroquois, which owns and operates an interstate natural gas pipeline located in the states of New York and Connecticut. Prior to the GT&S Transaction, Eastern Energy Gas, through the Questar Pipeline Group, owned 50% of White River Hub, which owns and operates a natural gas pipeline in northwest Colorado. As of December 31, 2020 and 2019, the carrying amount of Eastern Energy Gas' investments exceeded its share of underlying equity in net assets by $130 million and $146 million, respectively. The difference reflects equity method goodwill and is not being amortized. Eastern Energy Gas received distributions from its investments of $77 million, $74 million and $64 million for the years ended December 31, 2020, 2019 and 2018, respectively.

BHE Debt (Notes)

BHE Debt (Notes)	12 Months Ended
	Dec. 31, 2020
BHE Debt [Abstract]
BHE Debt [Text Block]	BHE Debt Senior Debt BHE senior debt represents unsecured senior obligations of BHE that are redeemable in whole or in part at any time generally with make-whole premiums. BHE senior debt consists of the following, including fair value adjustments and unamortized premiums, discounts and debt issuance costs, as of December 31 (in millions): Par Value 2020 2019 2.40% Senior Notes, due 2020 — — 349 2.375% Senior Notes, due 2021 450 448 448 2.80% Senior Notes, due 2023 400 398 398 3.75% Senior Notes, due 2023 500 498 498 3.50% Senior Notes, due 2025 400 398 398 4.05% Senior Notes, due 2025 1,250 1,246 — 3.25% Senior Notes, due 2028 600 594 594 8.48% Senior Notes, due 2028 256 257 259 3.70% Senior Notes, due 2030 1,100 1,096 — 1.65% Senior Notes, due 2031 500 497 — 6.125% Senior Bonds, due 2036 1,670 1,661 1,661 5.95% Senior Bonds, due 2037 550 548 548 6.50% Senior Bonds, due 2037 225 223 223 5.15% Senior Notes, due 2043 750 740 740 4.50% Senior Notes, due 2045 750 738 738 3.80% Senior Notes, due 2048 750 738 737 4.45% Senior Notes, due 2049 1,000 990 990 4.25% Senior Notes, due 2050 900 889 — 2.85% Senior Notes, due 2051 1,500 1,488 — Total BHE Senior Debt $ 13,551 $ 13,447 $ 8,581 Reflected as: Current liabilities $ 450 $ 350 Noncurrent liabilities 12,997 8,231 Total BHE Senior Debt $ 13,447 $ 8,581 Junior Subordinated Debentures BHE junior subordinated debentures consists of the following as of December 31 (in millions): Par Value 2020 2019 Junior subordinated debentures, due 2057 100 100 100 Total BHE junior subordinated debentures - noncurrent $ 100 $ 100 $ 100 In June 2017, BHE issued $100 million of its 5.00% junior subordinated debentures due June 2057 in exchange for 181,819 shares of BHE no par value common stock held by a minority shareholder. The junior subordinated debentures are redeemable at BHE's option at any time from and after June 15, 2037, at par plus accrued and unpaid interest. Interest expense to the minority shareholder was $5 million for each of the years ended December 31, 2020 and 2019.

Short-Term Debt and Credit Faci

Short-Term Debt and Credit Facilities (Notes)	12 Months Ended
	Dec. 31, 2020
Line of Credit Facility [Line Items]
Short-term Debt [Text Block]	The following table summarizes BHE's and its subsidiaries' availability under their credit facilities as of December 31 (in millions): MidAmerican NV Northern BHE BHE PacifiCorp Funding Energy Powergrid Canada Other Total (1) 2020: Credit facilities (2) $ 3,500 $ 1,200 $ 1,509 $ 650 $ 228 $ 923 $ 3,020 $ 11,030 Less: Short-term debt — (93) — (45) (23) (225) (1,900) (2,286) Tax-exempt bond support and letters of credit — (218) (370) — — (2) — (590) Net credit facilities $ 3,500 $ 889 $ 1,139 $ 605 $ 205 $ 696 $ 1,120 $ 8,154 2019: Credit facilities $ 3,500 $ 1,200 $ 1,309 $ 650 $ 199 $ 674 $ 1,880 $ 9,412 Less: Short-term debt (1,590) (130) — — — (211) (1,283) (3,214) Tax-exempt bond support and letters of credit — (256) (370) — — (3) — (629) Net credit facilities $ 1,910 $ 814 $ 939 $ 650 $ 199 $ 460 $ 597 $ 5,569 (1) The table does not include unused credit facilities and letters of credit for investments that are accounted for under the equity method. (2) Includes the drawn uncommitted credit facilities totaling $23 million at Northern Powergrid. As of December 31, 2020, the Company was in compliance with the covenants of its credit facilities and letter of credit arrangements. BHE BHE has a $3.5 billion unsecured credit facility expiring in June 2022 with one remaining one-year extension option subject to lender consent. This credit facility, which is for general corporate purposes, supports BHE's commercial paper program and provides for the issuance of letters of credit, has a variable interest rate based on the Eurodollar rate or a base rate, at BHE's option, plus a spread that varies based on BHE's credit ratings for its senior unsecured long-term debt securities. As of December 31, 2019, the weighted average interest rate on commercial paper borrowings outstanding was 1.91%. This credit facility requires that BHE's ratio of consolidated debt, including current maturities, to total capitalization not exceed 0.70 to 1.0 as of the last day of each quarter. As of December 31, 2020 and 2019, BHE had $105 million and $107 million, respectively, of letters of credit outstanding. These letters of credit primarily support power purchase agreements and debt service requirements at certain subsidiaries of BHE Renewables, LLC expiring through April 2022 and have provisions that automatically extend the annual expiration dates for an additional year unless the issuing bank elects not to renew a letter of credit prior to the expiration date. PacifiCorp PacifiCorp has a $600 million unsecured credit facility expiring in June 2022 and a $600 million unsecured credit facility expiring in June 2022 with one remaining one-year extension option subject to lender consent. These credit facilities, which support PacifiCorp's commercial paper program, certain series of its tax-exempt bond obligations and provide for the issuance of letters of credit, have variable interest rates based on the Eurodollar rate or a base rate, at PacifiCorp's option, plus a spread that varies based on PacifiCorp's credit ratings for its senior unsecured long-term debt securities. As of December 31, 2020 and 2019, the weighted average interest rate on commercial paper borrowings outstanding was 0.16% and 2.05%, respectively. These credit facilities require that PacifiCorp's ratio of consolidated debt, including current maturities, to total capitalization not exceed 0.65 to 1.0 as of the last day of each quarter. As of December 31, 2020 and 2019, PacifiCorp had $11 million and $13 million, respectively, of fully available letters of credit issued under committed arrangements in support of certain transactions required by third parties and generally have provisions that automatically extend the annual expiration dates for an additional year unless the issuing bank elects not to renew a letter of credit prior to the expiration date. MidAmerican Funding MidAmerican Energy has a $900 million unsecured credit facility expiring in June 2022. The credit facility, which supports MidAmerican Energy's commercial paper program and its variable-rate tax-exempt bond obligations and provides for the issuance of letters of credit, has a variable interest rate based on the Eurodollar rate or a base rate, at MidAmerican Energy's option, plus a spread that varies based on MidAmerican Energy's credit ratings for senior unsecured long-term debt securities. MidAmerican Energy has a $600 million unsecured credit facility, which expires in May 2021, with an option to extend for up to three months, and has a variable interest rate based on the Eurodollar rate or a base rate, at MidAmerican Energy's option, plus a spread. As of December 31, 2019, MidAmerican Energy had a $400 million unsecured credit facility expiring August 2020, which it terminated in May 2020. MidAmerican Energy had no commercial paper borrowings outstanding as of December 31, 2020 and 2019. The credit facility requires that MidAmerican Energy's ratio of consolidated debt, including current maturities, to total capitalization not exceed 0.65 to 1.0 as of the last day of each quarter. NV Energy Nevada Power has a $400 million secured credit facility expiring in June 2022 and Sierra Pacific has a $250 million secured credit facility expiring in June 2022. These credit facilities, which are for general corporate purposes and provide for the issuance of letters of credit, have a variable interest rate based on the Eurodollar rate or a base rate, at each of the Nevada Utilities' option, plus a spread that varies based on each of the Nevada Utilities' credit ratings for its senior secured long‑term debt securities. Amounts due under each credit facility are collateralized by each of the Nevada Utilities' general and refunding mortgage bonds. These credit facilities require that each of the Nevada Utilities' ratio of consolidated debt, including current maturities, to total capitalization not exceed 0.65 to 1.0 as of the last day of each quarter. Northern Powergrid Northern Powergrid has a £150 million unsecured credit facility and in October 2020, it exercised the option to extend the credit facility expiry date by one year to October 2023. The credit facility has a variable interest rate based on sterling London Interbank Offered Rate ("LIBOR") plus a spread that varies based on its credit ratings. The credit facility requires that the ratio of consolidated senior total net debt, including current maturities, to regulated asset value not exceed 0.8 to 1.0 at Northern Powergrid and 0.65 to 1.0 at Northern Powergrid (Northeast) plc and Northern Powergrid (Yorkshire) plc as of June 30 and December 31. Northern Powergrid's interest coverage ratio shall not be less than 2.5 to 1.0. AltaLink AltaLink has a C$500 million secured revolving term credit facility expiring in December 2024 with a recurring one-year extension option subject to lender consent. The credit facility, which provides support for borrowings under the unsecured commercial paper program and may also be used for general corporate purposes, has a variable interest rate based on the Canadian bank prime lending rate or a spread above the Bankers' Acceptance rate, at AltaLink's option, based on AltaLink's credit ratings for its senior secured long-term debt securities. In addition, AltaLink has a C$75 million secured revolving term credit facility expiring in December 2024 with a recurring one-year extension option subject to lender consent. The credit facility, which may be used for general corporate purposes and letters of credit, has a variable interest rate based on the Canadian bank prime lending rate, United States base rate, a spread above the United States LIBOR loan rate or a spread above the Bankers' Acceptance rate, at AltaLink's option, based on AltaLink's credit ratings for its senior secured long-term debt securities. On April 27, 2020, AltaLink added a C$100 million revolving term credit facility to its bank credit facilities with a maturity date of April 27, 2021. The credit facility, which may be used for general corporate purposes, has a variable interest rate based on the Canadian bank prime lending rate or a spread above the Bankers' Acceptance rate, at AltaLink's option, based on AltaLink's credit ratings for its senior secured long-term debt securities. On an annual basis, with the consent of the lenders, the AltaLink can request that the maturity date of the credit facility be extended for a further 365 days. AltaLink entered into this credit facility in order to provide additional liquidity during the COVID-19 pandemic and to provide support for certain regulatory decisions. As of December 31, 2020 and 2019, AltaLink had $113 million and $192 million outstanding under these facilities at a weighted average interest rate of 0.36% and 2.16%, respectively. The credit facilities require the consolidated indebtedness to total capitalization not exceed 0.75 to 1.0 measured as of the last day of each quarter. AltaLink Investments, L.P. has a C$300 million unsecured revolving term credit facility expiring in December 2024 with a recurring one-year extension option subject to lender consent. The credit facility, which may be used for general corporate purposes and letters of credit to a maximum of C$10 million, has a variable interest rate based on the Canadian bank prime lending rate, United States base rate, a spread above the United States LIBOR loan rate or a spread above the Bankers' Acceptance rate, at AltaLink Investments, L.P.'s option, based on AltaLink Investments, L.P.'s credit ratings for its senior unsecured long-term debt securities. On April 27, 2020, AltaLink Investments, L.P. added a C$200 million revolving term credit facility to its bank credit facilities with a maturity date of April 27, 2021. The credit facility, which may be used for general corporate purposes and letters of credit to a maximum of C$10 million, has a variable interest rate based on the Canadian bank prime lending rate, United States base rate, a spread above the United States LIBOR loan rate or a spread above the Bankers' Acceptance rate, at AltaLink Investments, L.P.'s option, based on AltaLink Investments, L.P.'s credit ratings for its senior unsecured long-term debt securities. On an annual basis, with the consent of the lenders, AltaLink Investments, L.P. can request that the maturity date of the credit facility be extended for a further 365 days. As of December 31, 2020 and 2019, AltaLink Investments, L.P. had $112 million and $19 million outstanding under this facility at a weighted average interest rate of 1.47% and 3.08%, respectively. The credit facilities require the consolidated total debt to capitalization to not exceed 0.8 to 1.0 and earnings before interest, taxes, depreciation and amortization to interest expense for the four fiscal quarters ended to not be less than 2.25 to 1.0 measured as of the last day of each quarter. HomeServices HomeServices has a $600 million unsecured credit facility expiring in September 2022. The credit facility, which is for general corporate purposes and provides for the issuance of letters of credit, has a variable interest rate based on the LIBOR or a base rate, at HomeServices' option, plus a spread that varies based on HomeServices' total net leverage ratio as of the last day of each quarter. As of December 31, 2020 and 2019, HomeServices had $100 million and $318 million, respectively, outstanding under its credit facility with a weighted average interest rate of 1.15% and 3.29%, respectively. Through its subsidiaries, HomeServices maintains mortgage lines of credit totaling $2.4 billion and $1.3 billion as of December 31, 2020 and 2019, respectively, used for mortgage banking activities that expire beginning in January 2021 through September 2021. The mortgage lines of credit have variable rates based on LIBOR plus a spread. Collateral for these credit facilities is comprised of residential property being financed and is equal to the loans funded with the facilities. As of December 31, 2020 and 2019, HomeServices had $1.8 billion and $965 million, respectively, outstanding under these mortgage lines of credit at a weighted average interest rate of 2.03% and 3.51%, respectively. BHE Renewables Letters of Credit As of December 31, 2020 and 2019, certain renewable projects collectively have letters of credit outstanding of $305 million and $373 million, respectively, primarily in support of the power purchase agreements and large generator interconnection agreements associated with the projects.
PacifiCorp [Member]
Line of Credit Facility [Line Items]
Short-term Debt [Text Block]	Short-term Debt and Credit Facilities The following table summarizes PacifiCorp's availability under its credit facilities as of December 31 (in millions): 2020: Credit facilities $ 1,200 Less: Short-term debt (93) Tax-exempt bond support (218) Net credit facilities $ 889 2019: Credit facilities $ 1,200 Less: Short-term debt (130) Tax-exempt bond support (256) Net credit facilities $ 814 As of December 31, 2020, PacifiCorp was in compliance with the covenants of its credit facilities and letter of credit arrangements. PacifiCorp has a $600 million unsecured credit facility expiring in June 2022 and a $600 million unsecured credit facility expiring in June 2022 with one remaining one-year extension option subject to lender consent. These credit facilities, which support PacifiCorp's commercial paper program, certain series of its tax-exempt bond obligations and provide for the issuance of letters of credit, have variable interest rates based on the Eurodollar rate or a base rate, at PacifiCorp's option, plus a spread that varies based on PacifiCorp's credit ratings for its senior unsecured long-term debt securities. As of December 31, 2020 and 2019, the weighted average interest rate on commercial paper borrowings outstanding was 0.16% and 2.05%, respectively. These credit facilities require that PacifiCorp's ratio of consolidated debt, including current maturities, to total capitalization not exceed 0.65 to 1.0 as of the last day of each quarter. As of December 31, 2020 and 2019, PacifiCorp had $11 million and $13 million, respectively, of fully available letters of credit issued under committed arrangements. As of December 31, 2020 and 2019, $11 million and $13 million, respectively, support certain transactions required by third parties and generally have provisions that automatically extend the annual expiration dates for an additional year unless the issuing bank elects not to renew a letter of credit prior to the expiration date.
MidAmerican Energy Company [Member]
Line of Credit Facility [Line Items]
Short-term Debt [Text Block]	Interim financing of working capital needs and the construction program is obtained from unaffiliated parties through the sale of commercial paper or short-term borrowing from banks. The following table summarizes MidAmerican Energy's availability under its unsecured revolving credit facilities as of December 31 (in millions): 2020 2019 Credit facilities $ 1,505 $ 1,305 Less: Variable-rate tax-exempt bond support (370) (370) Net credit facilities $ 1,135 $ 935 MidAmerican Energy has a $900 million unsecured credit facility expiring June 2022. The credit facility, which supports MidAmerican Energy's commercial paper program and its variable-rate tax-exempt bond obligations and provides for the issuance of letters of credit, has a variable interest rate based on the Eurodollar rate or a base rate, at MidAmerican Energy's option, plus a spread that varies based on MidAmerican Energy's credit ratings for senior unsecured long-term debt securities. MidAmerican Energy has a $600 million unsecured credit facility, which expires May 2021, with an option to extend for up to three months, and has a variable interest rate based on the Eurodollar rate or a base rate, at MidAmerican Energy's option, plus a spread. Additionally, MidAmerican Energy has a $5 million unsecured credit facility, which expires June 2021 and has a variable interest rate based on the Eurodollar rate plus a spread. As of December 31, 2019, MidAmerican Energy had a $400 million unsecured credit facility expiring August 2020, which was terminated in May 2020. MidAmerican Energy had no commercial paper borrowings outstanding of as of December 31, 2020 and 2019. The $900 million and $600 million credit facilities each require that MidAmerican Energy's ratio of consolidated debt, including current maturities, to total capitalization not exceed 0.65 to 1.0 as of the last day of any quarter. As of December 31, 2020, MidAmerican Energy was in compliance with the covenants of its credit facilities. MidAmerican Energy has authority from the FERC to issue commercial paper and bank notes aggregating $1.5 billion through April 2, 2022.
MidAmerican Funding, LLC and Subsidiaries [Member]
Line of Credit Facility [Line Items]
Short-term Debt [Text Block]	Refer to Note 7 of MidAmerican Energy's Notes to Financial Statements. In addition to MidAmerican Energy's credit facilities, MHC has a $4 million unsecured credit facility, which expires in June 2021 and has a variable interest rate based on the Eurodollar rate plus a spread. As of December 31, 2020 and 2019, there were no borrowings outstanding under this credit facility. As of December 31, 2020, MHC was in compliance with the covenants of its credit facility.
Nevada Power Company [Member]
Line of Credit Facility [Line Items]
Short-term Debt [Text Block]	Short-term Debt and Credit Facilities Nevada Power has a $400 million secured credit facility expiring in June 2022. The credit facility, which is for general corporate purposes and provide for the issuance of letters of credit, has a variable interest rate based on the Eurodollar rate or a base rate, at Nevada Power's option, plus a spread that varies based on Nevada Power's credit ratings for its senior secured long‑term debt securities. As of December 31, 2020 and 2019, Nevada Power had no borrowings outstanding under the credit facility. Amounts due under Nevada Power's credit facility are collateralized by Nevada Power's general and refunding mortgage bonds. The credit facility requires Nevada Power's ratio of consolidated debt, including current maturities, to total capitalization not exceed 0.65 to 1.0 as of the last day of each quarter.
Sierra Pacific Power Company [Member]
Line of Credit Facility [Line Items]
Short-term Debt [Text Block]	Short-term Debt and Credit Facilities The following table summarizes Sierra Pacific's availability under its credit facilities as of December 31 (in millions): 2020 2019 Credit facilities $ 250 $ 250 Short-term debt (45) — Net credit facilities $ 205 $ 250 Sierra Pacific has a $250 million secured credit facility expiring in June 2022 The credit facility, which is for general corporate purposes and provides for the issuance of letters of credit, has a variable interest rate based on the Eurodollar rate or a base rate, at Sierra Pacific's option, plus a spread that varies based on Sierra Pacific's credit ratings for its senior secured long‑term debt securities. As of December 31, 2020 and 2019, Sierra Pacific had borrowings of $45 million and $— million, respectively, outstanding under the credit facility. As of December 31, 2020, the weighted average interest rate on borrowings outstanding was 0.90%. Amounts due under Sierra Pacific's credit facility are collateralized by Sierra Pacific's general and refunding mortgage bonds. The credit facility requires Sierra Pacific's ratio of debt, including current maturities, to total capitalization not exceed 0.65 to 1.0 as of the last day of each quarter.
Eastern Energy Gas Holdings, LLC [Member]
Line of Credit Facility [Line Items]
Short-term Debt [Text Block]	Short-term Debt and Credit FacilitiesPrior to the GT&S Transaction, Eastern Energy Gas' short-term financing was supported through its access as co-borrower to a joint revolving credit facility with DEI. The credit facility was used for working capital, as support for the combined commercial paper programs of the borrowers under the credit facility and for other general corporate purposes. As of December 31, 2019, a maximum of $1.5 billion of the facility was available to Eastern Energy Gas and the sub-limit was $750 million. As of December 31, 2019, Eastern Energy Gas had $62 million of commercial paper outstanding with a weighted-average interest rate of 1.98%.

Subsidiary Debt (Notes)

Subsidiary Debt (Notes)	12 Months Ended
	Dec. 31, 2020
Debt Instrument [Line Items]
Subsidiary Debt	Long-term Debt PacifiCorp's long-term debt was as follows as of December 31 (dollars in millions): 2020 2019 Average Average Principal Carrying Interest Carrying Interest Amount Value Rate Value Rate First mortgage bonds: 2.95% to 8.53%, due through 2025 $ 2,149 $ 2,145 4.00 % $ 2,144 4.00 % 2.70% to 6.71%, due 2026 to 2030 900 895 3.50 497 4.14 5.25% to 7.70%, due 2031 to 2035 800 796 6.33 795 6.33 5.75% to 6.35%, due 2036 to 2039 2,500 2,485 6.06 2,484 6.06 4.10% due 2042 300 297 4.10 297 4.10 3.30% to 4.15%, due 2049 to 2051 1,800 1,776 3.86 1,186 4.14 Variable-rate series, tax-exempt bond obligations (2020-0.14% to 0.16%; 2019-1.60% to 1.80%): Due 2020 — — 38 1.78 Due 2025 25 25 0.14 24 1.75 Due 2024 to 2025 (1) 193 193 0.15 193 1.70 Total long-term debt $ 8,667 $ 8,612 $ 7,658 Reflected as: 2020 2019 Current portion of long-term debt $ 420 $ 38 Long-term debt 8,192 7,620 Total long-term debt $ 8,612 $ 7,658 (1) Secured by pledged first mortgage bonds registered to and held by the tax-exempt bond trustee generally with the same interest rates, maturity dates and redemption provisions as the tax-exempt bond obligations. PacifiCorp's long-term debt generally includes provisions that allow PacifiCorp to redeem the first mortgage bonds in whole or in part at any time through the payment of a make-whole premium. Variable-rate tax-exempt bond obligations are generally redeemable at par value. PacifiCorp currently has regulatory authority from the Oregon Public Utility Commission and the Idaho Public Utilities Commission to issue an additional $3.0 billion of long-term debt. PacifiCorp must make a notice filing with the Washington Utilities and Transportation Commission prior to any future issuance. PacifiCorp currently has an effective shelf registration statement filed with the United States Securities and Exchange Commission to issue an indeterminate amount of first mortgage bonds through September 2023. The issuance of PacifiCorp's first mortgage bonds is limited by available property, earnings tests and other provisions of PacifiCorp's mortgage. Approximately $30 billion of PacifiCorp's eligible property (based on original cost) was subject to the lien of the mortgage as of December 31, 2020. As of December 31, 2020, the annual principal maturities of long-term debt for 2021 and thereafter are as follows (in millions): Long-term Debt 2021 $ 420 2022 605 2023 449 2024 591 2025 302 Thereafter 6,300 Total 8,667 Unamortized discount and debt issuance costs (55) Total $ 8,612
MidAmerican Energy Company [Member]
Debt Instrument [Line Items]
Long-term Debt [Text Block]	MidAmerican Energy's long-term debt consists of the following, including amounts maturing within one year and unamortized premiums, discounts and debt issuance costs, as of December 31 (dollars in millions): Par Value 2020 2019 First mortgage bonds: 3.70%, due 2023 $ 250 $ 249 $ 249 3.50%, due 2024 500 501 501 3.10%, due 2027 375 373 373 3.65%, due 2029 850 862 864 4.80%, due 2043 350 346 346 4.40%, due 2044 400 395 395 4.25%, due 2046 450 445 445 3.95%, due 2047 475 470 470 3.65%, due 2048 700 689 688 4.25%, due 2049 900 873 872 3.15%, due 2050 600 592 591 Notes: 6.75% Series, due 2031 400 397 396 5.75% Series, due 2035 300 298 298 5.80% Series, due 2036 350 348 348 Transmission upgrade obligation, 4.45% and 3.42% due through 2035 and 2036, respectively 6 4 4 Variable-rate tax-exempt bond obligation series: (weighted average interest rate- 2020-0.14%, 2019-1.66%): Due 2023, issued in 1993 7 7 7 Due 2023, issued in 2008 57 57 57 Due 2024 35 35 35 Due 2025 13 13 13 Due 2036 33 33 33 Due 2038 45 45 45 Due 2046 30 29 29 Due 2047 150 149 149 Total $ 7,276 $ 7,210 $ 7,208 The annual repayments of MidAmerican Energy's long-term debt for the years beginning January 1, 2021, and thereafter, excluding unamortized premiums, discounts and debt issuance costs, are as follows (in millions): 2021 $ — 2022 — 2023 315 2024 535 2025 13 2026 and thereafter 6,413 Pursuant to MidAmerican Energy's mortgage dated September 9, 2013, MidAmerican Energy's first mortgage bonds, currently and from time to time outstanding, are secured by a first mortgage lien on substantially all of its electric generating, transmission and distribution property within the State of Iowa, subject to certain exceptions and permitted encumbrances. As of December 31, 2020, MidAmerican Energy's eligible property subject to the lien of the mortgage totaled approximately $22 billion based on original cost. Additionally, MidAmerican Energy's senior notes outstanding are equally and ratably secured with the first mortgage bonds as required by the indentures under which the senior notes were issued. MidAmerican Energy's variable-rate tax-exempt bond obligations bear interest at rates that are periodically established through remarketing of the bonds in the short-term tax-exempt market. MidAmerican Energy, at its option, may change the mode of interest calculation for these bonds by selecting from among several floating or fixed rate alternatives. The interest rates shown in the table above are the weighted average interest rates as of December 31, 2020 and 2019. MidAmerican Energy maintains revolving credit facility agreements to provide liquidity for holders of these issues. Additionally, MidAmerican Energy's obligations associated with the $30 million and $150 million variable rate, tax-exempt bond obligations due 2046 and 2047, respectively, are secured by an equal amount of first mortgage bonds pursuant to MidAmerican Energy's mortgage dated September 9, 2013, as supplemented and amended. As of December 31, 2020, MidAmerican Energy was in compliance with all of its applicable long-term debt covenants. In March 1999, MidAmerican Energy committed to the IUB to use commercially reasonable efforts to maintain an investment grade rating on its long-term debt and to maintain its common equity level above 42% of total capitalization unless circumstances beyond its control result in the common equity level decreasing to below 39% of total capitalization. MidAmerican Energy must seek the approval from the IUB of a reasonable utility capital structure if MidAmerican Energy's common equity level decreases below 42% of total capitalization, unless the decrease is beyond the control of MidAmerican Energy. MidAmerican Energy is also required to seek the approval of the IUB if MidAmerican Energy's equity level decreases to below 39%, even if the decrease is due to circumstances beyond the control of MidAmerican Energy. As of December 31, 2020, MidAmerican Energy's common equity ratio was 52% computed on a basis consistent with its commitment. As a result of its regulatory commitment to maintain its common equity level above certain thresholds, MidAmerican Energy could dividend $2.8 billion as of December 31, 2020, without falling below 42%.
MidAmerican Funding, LLC and Subsidiaries [Member]
Debt Instrument [Line Items]
Long-term Debt [Text Block]	Refer to Note 8 of MidAmerican Energy's Notes to Financial Statements for detail and a discussion of its long-term debt. In addition to MidAmerican Energy's annual repayments of long-term debt, MidAmerican Funding parent company has $239 million of 6.927% Senior Bonds due in 2029, with a carrying value of $240 million as of December 31, 2020 and 2019. The MidAmerican Funding parent company bonds are the direct senior secured obligations of MidAmerican Funding and effectively rank junior to all indebtedness and other liabilities of the direct and indirect subsidiaries of MidAmerican Funding, to the extent of the assets of these subsidiaries. MidAmerican Funding may redeem the bonds in whole or in part at any time at a redemption price equal to the sum of any accrued and unpaid interest to the date of redemption and the greater of (1) 100% of the principal amount of the bonds or (2) the sum of the present values of the remaining scheduled payments of principal and interest on the bonds, discounted to the date of redemption on a semiannual basis at the treasury yield plus 25 basis points. MidAmerican Funding parent company long-term debt is secured by a pledge of the common stock of MHC, which is not publicly traded. In the event of any triggering event under the related debt indenture, the common stock of MHC would be available to satisfy the applicable debt obligations. Triggering events include, among other specified circumstances, (1) default on the payment of interest for 30 days or principal for three days; (2) a material default in the performance of any material covenants or obligations in the indenture continuing for a period of 90 days after written notice in accordance with the indenture; or (3) the failure generally of MidAmerican Funding or any significant subsidiary to pay its debts when due. Previously, the consolidated financial statements of MHC Inc. were disclosed in Item 15(c) of this Form 10-K in accordance with Rule 3-16 of the U. S. Securities and Exchange Commission's Regulation S-X. In April 2020, the U. S. Securities and Exchange Commission published Rule 13-02 of Regulation S‑X to be effective January 4, 2021, with the option to adopt early. MidAmerican Funding adopted Rule 13-02, "Affiliates whose securities collateralize securities registered or being registered," on December 31, 2020. Under the new rule, disclosure of the separate consolidated financial statements of MHC Inc. is no longer required. The assets, liabilities and results of operations of consolidated MHC are not materially different than the corresponding amounts presented in the consolidated financial statements of MidAmerican Funding, other than the MidAmerican Funding parent company debt and related interest expense and income tax. As such, disclosure of summarized financial information of consolidated MHC Inc. is not required. Subsidiaries of MidAmerican Funding must make payments on their own indebtedness before making distributions to MidAmerican Funding. Refer to Note 8 of MidAmerican Energy's Notes to Financial Statements for a discussion of utility regulatory restrictions affecting distributions from MidAmerican Energy. As a result of the utility regulatory restrictions agreed to by MidAmerican Energy in March 1999, MidAmerican Funding had restricted net assets of $5.2 billion as of December 31, 2020. As of December 31, 2020, MidAmerican Funding was in compliance with all of its applicable long-term debt covenants. Each of MidAmerican Funding's direct or indirect subsidiaries is organized as a legal entity separate and apart from MidAmerican Funding and its other subsidiaries. It should not be assumed that any asset of any subsidiary of MidAmerican Funding will be available to satisfy the obligations of MidAmerican Funding or any of its other subsidiaries; provided, however, that unrestricted cash or other assets which are available for distribution may, subject to applicable law and the terms of financing arrangements of such parties, be advanced, loaned, paid as dividends or otherwise distributed or contributed to MidAmerican Funding, one of its subsidiaries or affiliates thereof.
Nevada Power Company [Member]
Debt Instrument [Line Items]
Debt Disclosure [Text Block]	Long-term Debt Nevada Power's long-term debt consists of the following, including unamortized premiums, discounts and debt issuance costs, as of December 31 (dollars in millions): Par Value 2020 2019 General and refunding mortgage securities: 2.750% Series BB, due 2020 $ — $ — $ 575 3.700% Series CC, due 2029 500 496 496 2.400% Series DD, due 2030 425 422 — 6.650% Series N, due 2036 367 359 358 6.750% Series R, due 2037 349 346 346 5.375% Series X, due 2040 250 248 248 5.450% Series Y, due 2041 250 237 237 3.125% Series EE, due 2050 300 297 — Tax-exempt refunding revenue bond obligations: Fixed-rate series: 1.875% Pollution Control Bonds Series 2017A, due 2032 (1) 40 39 39 1.650% Pollution Control Bonds Series 2017, due 2036 (1) 40 39 39 1.650% Pollution Control Bonds Series 2017B, due 2039 (1) 13 13 13 Total long-term debt $ 2,534 $ 2,496 $ 2,351 Reflected as: Current portion of long-term debt $ — $ 575 Long-term debt 2,496 1,776 Total long-term debt $ 2,496 $ 2,351 (1) Bonds were purchased by Nevada Power in May 2020 and re-offered at a fixed interest rate. Subject to mandatory purchase by Nevada Power in March 2023 at which date the interest rate may be adjusted. Annual Payment on Long-Term Debt The annual repayments of long-term debt for the years beginning January 1, 2021 and thereafter, are as follows (in millions): 2026 and thereafter $ 2,534 Unamortized premium, discount and debt issuance cost (38) Total $ 2,496 The issuance of General and Refunding Mortgage Securities by Nevada Power is subject to PUCN approval and is limited by available property and other provisions of the mortgage indentures. As of December 31, 2020, approximately $9.1 billion (based on original cost) of Nevada Power's property was subject to the liens of the mortgages.
Sierra Pacific Power Company [Member]
Debt Instrument [Line Items]
Debt Disclosure [Text Block]	Long-term Debt Sierra Pacific's long-term debt consists of the following, including unamortized premiums, discounts and debt issuance costs, as of December 31 (dollars in millions): Par Value 2020 2019 General and refunding mortgage securities: 3.375% Series T, due 2023 $ 250 $ 249 $ 249 2.600% Series U, due 2026 400 396 396 6.750% Series P, due 2037 252 255 255 Tax-exempt refunding revenue bond obligations: Fixed-rate series: 1.850% Pollution Control Series 2016B, due 2029 (1) 30 29 29 3.000% Gas and Water Series 2016B, due 2036 (2) 60 61 62 0.625% Water Facilities Series 2016C, due 2036 (3) 30 30 — 2.050% Water Facilities Series 2016D, due 2036 (1) (4) 25 25 25 2.050% Water Facilities Series 2016E, due 2036 (1) (4) 25 25 25 2.050% Water Facilities Series 2016F, due 2036 (1) 75 74 74 1.850% Water Facilities Series 2016G, due 2036 (1) 20 20 20 Total long-term debt $ 1,167 $ 1,164 $ 1,135 Reflected as - Long-term debt $ 1,164 $ 1,135 (1) Subject to mandatory purchase by Sierra Pacific in April 2022 at which date the interest rate may be adjusted. (2) Subject to mandatory purchase by Sierra Pacific in June 2022 at which date the interest rate may be adjusted. (3) Bond was purchased by Sierra Pacific during 2019 and re-offered at a fixed rate in September 2020 for a two-year term subject to mandatory purchase by Sierra Pacific in April 2022. (4) Bonds were purchased by Sierra Pacific during 2019 and re-offered at a fixed interest rate. Annual Payment on Long-Term Debt The annual repayments of long-term debt for the years beginning January 1, 2021 and thereafter, are as follows (in millions): 2023 $ 250 2026 and thereafter 917 Total 1,167 Unamortized premium, discount and debt issuance cost (3) Total $ 1,164 The issuance of General and Refunding Mortgage Securities by Sierra Pacific is subject to PUCN approval and is limited by available property and other provisions of the mortgage indentures. As of December 31, 2020, approximately $4.3 billion (based on original cost) of Sierra Pacific's property was subject to the liens of the mortgages.
Eastern Energy Gas Holdings, LLC [Member]
Debt Instrument [Line Items]
Long-term Debt [Text Block]	Long-term Debt Eastern Energy Gas' long-term debt consists of the following, including unamortized premiums, discounts and debt issuance costs, as of December 31 (dollars and euros in millions): Par Value 2020 2019 Variable-rate Senior Notes, due 2021 (1) $ 500 $ 500 $ 499 2.8% Senior Notes, due 2020 — — 699 2.875% Senior Notes, due 2023 250 249 249 3.55% Senior Notes, due 2023 400 399 398 2.5% Senior Notes, due 2024 600 596 596 3.6% Senior Notes, due 2024 450 448 447 3.32% Senior Notes, due 2026 (€250) (2) 305 304 279 3.53% Senior Notes, due 2028 (3) — — 99 3% Senior Notes, due 2029 600 594 594 3.8% Senior Notes, due 2031 150 150 149 3.91% Senior Notes, due 2038 (3) — — 149 4.875% Senior Notes, due 2041 (3) — — 177 4.8% Senior Notes, due 2043 400 395 395 4.6% Senior Notes, due 2044 500 493 493 3.9% Senior Notes, due 2049 300 297 297 Total long-term debt $ 4,455 $ 4,425 $ 5,520 Reflected as: Current portion of long-term debt $ 500 $ 699 Long-term debt 3,925 4,821 Total long-term debt $ 4,425 $ 5,520 (1) The senior notes have variable interest rates based on LIBOR plus an applicable spread. Eastern Energy Gas has entered into an interest rate swap that fixes the interest rate on 100% of the notes. The fixed interest rates as of December 31, 2020 and 2019 were 3.46% (including a 0.60% margin). (2) The senior notes are denominated in Euros with an outstanding principal balance of €250 million and a fixed interest rate of 1.45%. Eastern Energy Gas has entered into cross currency swaps that fix USD payments for 100% of the notes. The fixed USD outstanding principal when combined with the swaps is $280 million, with fixed interest rates at both December 31, 2020 and 2019 that averaged 3.32%. (3) Long-term debt associated with the Questar Pipeline Group. Annual Payment on Long-Term Debt The annual repayments of long-term debt for the years beginning January 1, 2021 and thereafter, are as follows (in millions): 2021 $ 500 2022 — 2023 650 2024 1,050 2025 — 2026 and thereafter 2,255 Total 4,455 Unamortized premium, discount and debt issuance cost (30) Total $ 4,425

Risk Management and Hedging Act

Risk Management and Hedging Activities (Notes)	12 Months Ended
	Dec. 31, 2020
PacifiCorp [Member]
Derivative [Line Items]
Risk Management and Hedging Activities [Text Block]	Risk Management and Hedging Activities PacifiCorp is exposed to the impact of market fluctuations in commodity prices and interest rates. PacifiCorp is principally exposed to electricity, natural gas, coal and fuel oil commodity price risk as it has an obligation to serve retail customer load in its service territories. PacifiCorp's load and generating facilities represent substantial underlying commodity positions. Exposures to commodity prices consist mainly of variations in the price of fuel required to generate electricity and wholesale electricity that is purchased and sold. Commodity prices are subject to wide price swings as supply and demand are impacted by, among many other unpredictable items, weather, market liquidity, generating facility availability, customer usage, storage, and transmission and transportation constraints. Interest rate risk exists on variable-rate debt and future debt issuances. PacifiCorp does not engage in a material amount of proprietary trading activities. PacifiCorp has established a risk management process that is designed to identify, manage and report each of the various types of risk involved in its business. To mitigate a portion of its commodity price risk, PacifiCorp uses commodity derivative contracts, which may include forwards, options, swaps and other agreements, to effectively secure future supply or sell future production generally at fixed prices. PacifiCorp manages its interest rate risk by limiting its exposure to variable interest rates primarily through the issuance of fixed-rate long-term debt and by monitoring market changes in interest rates. Additionally, PacifiCorp may from time to time enter into interest rate derivative contracts, such as interest rate swaps or locks, to mitigate PacifiCorp's exposure to interest rate risk. No interest rate derivatives were in place during the periods presented. PacifiCorp does not hedge all of its commodity price and interest rate risks, thereby exposing the unhedged portion to changes in market prices. There have been no significant changes in PacifiCorp's accounting policies related to derivatives. Refer to Notes 2 and 13 for additional information on derivative contracts. The following table, which reflects master netting arrangements and excludes contracts that have been designated as normal under the normal purchases or normal sales exception afforded by GAAP, summarizes the fair value of PacifiCorp's derivative contracts, on a gross basis, and reconciles those amounts to the amounts presented on a net basis on the Consolidated Balance Sheets (in millions): Other Other Other Current Other Current Long-term Assets Assets Liabilities Liabilities Total As of December 31, 2020: Not designated as hedging contracts (1) : Commodity assets $ 29 $ 6 $ 1 $ — $ 36 Commodity liabilities (2) — (23) (28) (53) Total 27 6 (22) (28) (17) Total derivatives 27 6 (22) (28) (17) Cash collateral receivable — — 15 9 24 Total derivatives - net basis $ 27 $ 6 $ (7) $ (19) $ 7 As of December 31, 2019: Not designated as hedging contracts (1) : Commodity assets $ 15 $ 2 $ 4 $ — $ 21 Commodity liabilities (3) — (31) (50) (84) Total 12 2 (27) (50) (63) Total derivatives 12 2 (27) (50) (63) Cash collateral receivable — — 20 27 47 Total derivatives - net basis $ 12 $ 2 $ (7) $ (23) $ (16) (1) PacifiCorp's commodity derivatives are generally included in rates and as of December 31, 2020 and 2019, a regulatory asset of $17 million and $62 million, respectively, was recorded related to the net derivative liability of $17 million and $63 million, respectively. The following table reconciles the beginning and ending balances of PacifiCorp's regulatory assets and summarizes the pre-tax gains and losses on commodity derivative contracts recognized in regulatory assets, as well as amounts reclassified to earnings for the years ended December 31 (in millions): 2020 2019 2018 Beginning balance $ 62 $ 96 $ 101 Changes in fair value recognized in regulatory assets (11) (37) 12 Net gains (losses) reclassified to operating revenue 3 (34) (68) Net (losses) gains reclassified to energy costs (37) 37 51 Ending balance $ 17 $ 62 $ 96 Derivative Contract Volumes The following table summarizes the net notional amounts of outstanding commodity derivative contracts with fixed price terms that comprise the mark-to-market values as of December 31 (in millions): Unit of Measure 2020 2019 Electricity sales Megawatt hours (1) (2) Natural gas purchases Decatherms 100 129 Credit Risk PacifiCorp is exposed to counterparty credit risk associated with wholesale energy supply and marketing activities with other utilities, energy marketing companies, financial institutions and other market participants. Credit risk may be concentrated to the extent PacifiCorp's counterparties have similar economic, industry or other characteristics and due to direct or indirect relationships among the counterparties. Before entering into a transaction, PacifiCorp analyzes the financial condition of each significant wholesale counterparty, establishes limits on the amount of unsecured credit to be extended to each counterparty and evaluates the appropriateness of unsecured credit limits on an ongoing basis. To further mitigate wholesale counterparty credit risk, PacifiCorp enters into netting and collateral arrangements that may include margining and cross-product netting agreements and obtains third-party guarantees, letters of credit and cash deposits. If required, PacifiCorp exercises rights under these arrangements, including calling on the counterparty's credit support arrangement. Collateral and Contingent Features In accordance with industry practice, certain wholesale agreements, including derivative contracts, contain credit support provisions that in part base certain collateral requirements on credit ratings for senior unsecured debt as reported by one or more of the recognized credit rating agencies. These agreements may either specifically provide bilateral rights to demand cash or other security if credit exposures on a net basis exceed specified rating-dependent threshold levels ("credit-risk-related contingent features") or provide the right for counterparties to demand "adequate assurance" if there is a material adverse change in PacifiCorp's creditworthiness. These rights can vary by contract and by counterparty. As of December 31, 2020, PacifiCorp's credit ratings for its senior secured debt and its issuer credit ratings for senior unsecured debt from the recognized credit rating agencies were investment grade. The aggregate fair value of PacifiCorp's derivative contracts in liability positions with specific credit-risk-related contingent features totaled $51 million and $80 million as of December 31, 2020 and 2019, respectively, for which PacifiCorp had posted collateral of $24 million and $47 million, respectively, in the form of cash deposits. If all credit-risk-related contingent features for derivative contracts in liability positions had been triggered as of December 31, 2020 and 2019, PacifiCorp would have been required to post $25 million and $27 million, respectively, of additional collateral. PacifiCorp's collateral requirements could fluctuate considerably due to market price volatility, changes in credit ratings, changes in legislation or regulation or other factors.
Eastern Energy Gas Holdings, LLC [Member]
Derivative [Line Items]
Risk Management and Hedging Activities [Text Block]	Risk Management and Hedging ActivitiesEastern Energy Gas is exposed to the impact of market fluctuations in commodity prices, interest rates, and foreign currency exchange rates. Eastern Energy Gas is principally exposed to natural gas market fluctuations primarily through fuel retained and used during the operation of the pipeline system as well as lost and unaccounted for gas, to interest rate risk on its outstanding variable-rate short- and long-term debt and future debt issuances, and to foreign currency exchange risk associated with Euro denominated debt. Eastern Energy Gas has established a risk management process that is designed to identify, assess, manage, mitigate, monitor and report, each of the various types of risk involved in its business. To mitigate a portion of its commodity price risk, Eastern Energy Gas uses over-the-counter commodity derivative contracts, which may include forwards, options, swaps and other agreements, to effectively secure future supply or sell future production generally at fixed prices. Eastern Energy Gas also uses over-the-counter interest rate swaps to hedge its exposure to variable interest rates on long-term debt as well as over-the-counter foreign currency swaps to hedge its exposure to principal and interest payments denominated in Euros. Eastern Energy Gas does not hedge all of its commodity price and interest rate risks, thereby exposing the unhedged portion to changes in market prices. Subsequent to the GT&S Transaction, Eastern Energy Gas has elected to offset derivative contracts where master netting arrangements allow. There have been no other significant changes in Eastern Energy Gas' accounting policies related to derivatives. Refer to Notes 2 and 15 for additional information on derivative contracts. The following table, which reflects master netting arrangements and excludes contracts that have been designated as normal under the normal purchases or normal sales exception afforded by GAAP, summarizes the fair value of Eastern Energy Gas' derivative contracts, on a gross basis, and reconciles those amounts to the amounts presented on a net basis on the Consolidated Balance Sheets (in millions): Other Other Other Current Other Current Long-term Assets Assets Liabilities Liabilities Total As of December 31, 2020: Designated as hedging contracts: Interest rate contracts $ — $ — $ (6) $ — $ (6) Foreign currency contracts — 20 (2) — 18 Not designated as hedging contracts: Commodity contracts — — (1) — (1) Total — 20 (9) — 11 Total derivatives — 20 (9) — 11 Cash collateral receivable — — — — — Total - net basis $ — $ 20 $ (9) $ — $ 11 As of December 31, 2019: Designated as hedging contracts: Interest rate contracts $ — $ — $ (30) $ (53) $ (83) Foreign currency contracts — 8 (3) — 5 Total — 8 (33) (53) (78) Total derivatives — 8 (33) (53) (78) Cash collateral receivable — — — — — Total - net basis $ — $ 8 $ (33) $ (53) $ (78) AOCI The following table presents selected information related to losses on cash flow hedges included in AOCI in Eastern Energy Gas' Consolidated Balance Sheet as of December 31, 2020 (in millions): AOCI After-Tax Amounts Expected to be Reclassified to Earnings During the Next 12 Months After-Tax Maximum Term Interest rate $ (45) $ (5) 288 months Foreign currency (6) (2) 66 months Total $ (51) $ (7) The amounts that will be reclassified from AOCI to earnings will generally be offset by the recognition of the hedged transactions (e.g., interest payments) in earnings, thereby achieving the realization of prices contemplated by the underlying risk management strategies and will vary from the expected amounts presented above as a result of changes in interest rates and foreign currency exchange rates. In July 2020, Eastern Energy Gas recorded a loss of $141 million ($105 million after-tax) in interest expense in the Consolidated Statement of Operations, for cash flow hedges of debt-related items that are probable of not occurring as a result of the GT&S Transaction. The derivatives related to these hedges were settled in October 2020 for a cash payment of $165 million. Gains and Losses on Derivative Contracts The following tables present the gains and losses on Eastern Energy Gas' derivatives, as well as where the associated activity is presented in its Consolidated Balance Sheets and Consolidated Statements of Operations for the years ended December 31 (in millions): Derivatives in cash flow hedging relationships Amount of Gain (Loss) Recognized in AOCI on Derivatives (Effective Portion) (1) Amount of Gain (Loss) Reclassified from AOCI to Income 2020 Derivative type and location of gains (losses): Interest rate (2) $ (104) $ (157) Foreign currency (3) 12 25 Total $ (92) $ (132) 2019 Derivative type and location of gains (losses): Commodity: Net income from discontinued operations $ 4 Total commodity $ 1 $ 4 Interest rate (2) (68) (5) Foreign currency (3) (18) (6) Total $ (85) $ (7) 2018 Derivative type and location of gains (losses): Commodity: Net income from discontinued operations $ (8) Total commodity $ 1 $ (8) Interest rate (2) (16) (5) Foreign currency (3) (6) (13) Total $ (21) $ (26) (1) Amounts deferred into AOCI have no associated effect in Eastern Energy Gas' Consolidated Statements of Operations. (2) Amounts recorded in Eastern Energy Gas' Consolidated Statements of Operations are classified in interest expense. (3) Amounts recorded in Eastern Energy Gas' Consolidated Statements of Operations are classified in other, net. Amount of Gain (Loss) Recognized in Income on Derivatives Derivatives not designated as hedging instruments 2020 2019 2018 Derivative type and location of gains (losses): Interest rate (1) $ 5 $ — $ — Commodity: Operating revenue (1) — (11) Total $ 4 $ — $ (11) (1) Amounts recorded in Eastern Energy Gas' Consolidated Statements of Operations are classified in interest expense. Derivative Contract Volumes The following table summarizes the net notional amounts of outstanding commodity derivative contracts with fixed price terms that comprise the mark-to-market values as of December 31 (in millions): Unit of Measure 2020 2019 Interest rate U.S. $ 500 1,300 Foreign currency Euro € 250 250 Natural gas Dth 5 — Credit Risk Eastern Energy Gas is exposed to counterparty credit risk associated with wholesale energy supply and marketing activities with other utilities, energy marketing companies, financial institutions and other market participants. Credit risk may be concentrated to the extent Eastern Energy Gas' counterparties have similar economic, industry or other characteristics and due to direct or indirect relationships among the counterparties. Before entering into a transaction, Eastern Energy Gas analyzes the financial condition of each significant wholesale counterparty, establishes limits on the amount of unsecured credit to be extended to each counterparty and evaluates the appropriateness of unsecured credit limits on an ongoing basis. To further mitigate wholesale counterparty credit risk, Eastern Energy Gas enters into netting and collateral arrangements that may include margining and cross-product netting agreements and obtains third-party guarantees, letters of credit and cash deposits. If required, Eastern Energy Gas exercises rights under these arrangements, including calling on the counterparty's credit support arrangement. Upon the Cove Point LNG export/liquefaction facility commencing commercial operations in April 2018, the majority of Cove Point's revenue and earnings are from annual reservation payments under certain terminalling, storage and transportation contracts with ST Cove Point, LLC, a joint venture of Sumitomo Corporation and Tokyo Gas Co., LTD., and GAIL Global (USA) LNG, LLC (the "Export Customers"). If such agreements were terminated and Cove Point was unable to replace such agreements on comparable terms, there could be a material impact on results of operations, financial condition and/or cash flows. The Export Customers comprised approximately 34% of Eastern Energy Gas' operating revenues for both of the years ended December 31, 2020 and 2019, with Eastern Energy Gas' largest customer representing approximately 17% of such amounts. For the year ended December 31, 2020, EGTS provided service to 289 customers with approximately 98% of its storage and transportation revenue being provided through firm services. The ten largest customers provided approximately 37% of the total storage and transportation revenue and the thirty largest provided approximately 69% of the total storage and transportation revenue.

Fair Value Measurements (Notes)

Fair Value Measurements (Notes)	12 Months Ended
	Dec. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Measurements [Text Block]	Fair Value Measurements The carrying value of the Company's cash, certain cash equivalents, receivables, payables, accrued liabilities and short-term borrowings approximates fair value because of the short-term maturity of these instruments. The Company has various financial assets and liabilities that are measured at fair value on the Consolidated Financial Statements using inputs from the three levels of the fair value hierarchy. A financial asset or liability classification within the hierarchy is determined based on the lowest level input that is significant to the fair value measurement. The three levels are as follows: • Level 1 - Inputs are unadjusted quoted prices in active markets for identical assets or liabilities that the Company has the ability to access at the measurement date. • Level 2 - Inputs include quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not active, inputs other than quoted prices that are observable for the asset or liability and inputs that are derived principally from or corroborated by observable market data by correlation or other means (market corroborated inputs). • Level 3 - Unobservable inputs reflect the Company's judgments about the assumptions market participants would use in pricing the asset or liability since limited market data exists. The Company develops these inputs based on the best information available, including its own data. The following table presents the Company's assets and liabilities recognized on the Consolidated Balance Sheets and measured at fair value on a recurring basis (in millions): Input Levels for Fair Value Measurements Level 1 Level 2 Level 3 Other (1) Total As of December 31, 2020: Assets: Commodity derivatives $ 1 $ 73 $ 135 $ (21) $ 188 Foreign currency exchange rate derivatives — 20 — — 20 Interest rate derivatives — — 62 — 62 Mortgage loans held for sale — 2,001 — — 2,001 Money market mutual funds (2) 873 — — — 873 Debt securities: United States government obligations 200 — — — 200 International government obligations — 5 — — 5 Corporate obligations — 73 — — 73 Municipal obligations — 2 — — 2 Agency, asset and mortgage-backed obligations — 6 — — 6 Equity securities: United States companies 381 — — — 381 International companies 5,906 — — — 5,906 Investment funds 201 — — — 201 $ 7,562 $ 2,180 $ 197 $ (21) $ 9,918 Liabilities: Commodity derivatives $ (1) $ (90) $ (19) $ 56 $ (54) Foreign currency exchange rate derivatives — (2) — — (2) Interest rate derivatives (5) (60) — — (65) $ (6) $ (152) $ (19) $ 56 $ (121) As of December 31, 2019: Assets: Commodity derivatives $ — $ 45 $ 108 $ (24) $ 129 Interest rate derivatives — 2 14 — 16 Mortgage loans held for sale — 1,039 — — 1,039 Money market mutual funds (2) 824 — — — 824 Debt securities: United States government obligations 189 — — — 189 International government obligations — 4 — — 4 Corporate obligations — 58 — — 58 Municipal obligations — 1 — — 1 Agency, asset and mortgage-backed obligations — 1 — — 1 Equity securities: United States companies 336 — — — 336 International companies 1,131 — — — 1,131 Investment funds 169 — — — 169 $ 2,649 $ 1,150 $ 122 $ (24) $ 3,897 Liabilities: Commodity derivatives $ (4) $ (143) $ (11) $ 103 $ (55) Interest rate derivatives (2) (19) — — (21) $ (6) $ (162) $ (11) $ 103 $ (76) (1) Represents netting under master netting arrangements and a net cash collateral receivable of $35 million and $79 million as of December 31, 2020 and 2019, respectively. (2) Amounts are included in cash and cash equivalents; other current assets; and noncurrent investments and restricted cash and investments on the Consolidated Balance Sheets. The fair value of these money market mutual funds approximates cost. Derivative contracts are recorded on the Consolidated Balance Sheets as either assets or liabilities and are stated at estimated fair value unless they are designated as normal purchases or normal sales and qualify for the exception afforded by GAAP. When available, the fair value of derivative contracts is estimated using unadjusted quoted prices for identical contracts in the market in which the Company transacts. When quoted prices for identical contracts are not available, the Company uses forward price curves. Forward price curves represent the Company's estimates of the prices at which a buyer or seller could contract today for delivery or settlement at future dates. The Company bases its forward price curves upon market price quotations, when available, or internally developed and commercial models, with internal and external fundamental data inputs. Market price quotations are obtained from independent brokers, exchanges, direct communication with market participants and actual transactions executed by the Company. Market price quotations are generally readily obtainable for the applicable term of the Company's outstanding derivative contracts; therefore, the Company's forward price curves reflect observable market quotes. Market price quotations for certain electricity and natural gas trading hubs are not as readily obtainable due to the length of the contract. Given that limited market data exists for these contracts, as well as for those contracts that are not actively traded, the Company uses forward price curves derived from internal models based on perceived pricing relationships to major trading hubs that are based on unobservable inputs. The estimated fair value of these derivative contracts is a function of underlying forward commodity prices, interest rates, currency rates, related volatility, counterparty creditworthiness and duration of contracts. The Company's mortgage loans held for sale are valued based on independent quoted market prices, where available, or the prices of other mortgage whole loans with similar characteristics. As necessary, these prices are adjusted for typical securitization activities, including servicing value, portfolio composition, market conditions and liquidity. The Company's investments in money market mutual funds and debt and equity securities are stated at fair value. When available, a readily observable quoted market price or net asset value of an identical security in an active market is used to record the fair value. In the absence of a quoted market price or net asset value of an identical security, the fair value is determined using pricing models or net asset values based on observable market inputs and quoted market prices of securities with similar characteristics. The following table reconciles the beginning and ending balances of the Company's assets and liabilities measured at fair value on a recurring basis using significant Level 3 inputs for the years ended December 31 (in millions): Commodity Derivatives Interest Rate Derivatives 2020 2019 2018 2020 2019 2018 Beginning balance $ 97 $ 99 $ 94 $ 14 $ 10 $ 9 Changes included in earnings (10) 10 1 772 479 181 Changes in fair value recognized in OCI — (1) 2 — — — Changes in fair value recognized in net regulatory assets (17) (26) 3 — — — Purchases 5 6 3 — — — Settlements 41 9 (4) (724) (475) (180) Ending balance $ 116 $ 97 $ 99 $ 62 $ 14 $ 10 The Company's long-term debt is carried at cost, including fair value adjustments and unamortized premiums, discounts and debt issuance costs as applicable, on the Consolidated Financial Statements. The fair value of the Company's long-term debt is a Level 2 fair value measurement and has been estimated based upon quoted market prices, where available, or at the present value of future cash flows discounted at rates consistent with comparable maturities with similar credit risks. The carrying value of the Company's variable-rate long-term debt approximates fair value because of the frequent repricing of these instruments at market rates. The following table presents the carrying value and estimated fair value of the Company's long-term debt as of December 31 (in millions): 2020 2019 Carrying Fair Carrying Fair Value Value Value Value Long-term debt $ 49,866 $ 60,633 $ 39,353 $ 46,004	[1],[2]
PacifiCorp [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Measurements [Text Block]	Fair Value Measurements The carrying value of PacifiCorp's cash, certain cash equivalents, receivables, payables, accrued liabilities and short-term borrowings approximates fair value because of the short-term maturity of these instruments. PacifiCorp has various financial assets and liabilities that are measured at fair value on the Consolidated Financial Statements using inputs from the three levels of the fair value hierarchy. A financial asset or liability classification within the hierarchy is determined based on the lowest level input that is significant to the fair value measurement. The three levels are as follows: • Level 1 - Inputs are unadjusted quoted prices in active markets for identical assets or liabilities that PacifiCorp has the ability to access at the measurement date. • Level 2 - Inputs include quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not active, inputs other than quoted prices that are observable for the asset or liability and inputs that are derived principally from or corroborated by observable market data by correlation or other means (market corroborated inputs). • Level 3 - Unobservable inputs reflect PacifiCorp's judgments about the assumptions market participants would use in pricing the asset or liability since limited market data exists. PacifiCorp develops these inputs based on the best information available, including its own data. The following table presents PacifiCorp's assets and liabilities recognized on the Consolidated Balance Sheets and measured at fair value on a recurring basis (in millions): Input Levels for Fair Value Measurements Level 1 Level 2 Level 3 Other (1) Total As of December 31, 2020: Assets: Commodity derivatives $ — $ 36 $ — $ (3) $ 33 Money market mutual funds (2) 6 — — — 6 Investment funds 25 — — — 25 $ 31 $ 36 $ — $ (3) $ 64 Liabilities - Commodity derivatives $ — $ (53) $ — $ 27 $ (26) As of December 31, 2019: Assets: Commodity derivatives $ — $ 21 $ — $ (7) $ 14 Money market mutual funds (2) 23 — — — 23 Investment funds 25 — — — 25 $ 48 $ 21 $ — $ (7) $ 62 Liabilities - Commodity derivatives $ — $ (84) $ — $ 54 $ (30) (1) Represents netting under master netting arrangements and a net cash collateral receivable of $24 million and $47 million as of December 31, 2020 and 2019, respectively. (2) Amounts are included in cash and cash equivalents, other current assets and other assets on the Consolidated Balance Sheets. The fair value of these money market mutual funds approximates cost. Derivative contracts are recorded on the Consolidated Balance Sheets as either assets or liabilities and are stated at estimated fair value unless they are designated as normal purchases or normal sales and qualify for the exception afforded by GAAP. When available, the fair value of derivative contracts is estimated using unadjusted quoted prices for identical contracts in the market in which PacifiCorp transacts. When quoted prices for identical contracts are not available, PacifiCorp uses forward price curves. Forward price curves represent PacifiCorp's estimates of the prices at which a buyer or seller could contract today for delivery or settlement at future dates. PacifiCorp bases its forward price curves upon market price quotations, when available, or internally developed and commercial models, with internal and external fundamental data inputs. Market price quotations are obtained from independent energy brokers, exchanges, direct communication with market participants and actual transactions executed by PacifiCorp. Market price quotations for certain major electricity and natural gas trading hubs are generally readily obtainable for the first three years; therefore, PacifiCorp's forward price curves for those locations and periods reflect observable market quotes. Market price quotations for other electricity and natural gas trading hubs are not as readily obtainable for the first three years. Given that limited market data exists for these contracts, as well as for those contracts that are not actively traded, PacifiCorp uses forward price curves derived from internal models based on perceived pricing relationships to major trading hubs that are based on unobservable inputs. The estimated fair value of these derivative contracts is a function of underlying forward commodity prices, interest rates, currency rates, related volatility, counterparty creditworthiness and duration of contracts. Refer to Note 12 for further discussion regarding PacifiCorp's risk management and hedging activities. PacifiCorp's investments in money market mutual funds and investment funds are stated at fair value. When available, PacifiCorp uses a readily observable quoted market price or net asset value of an identical security in an active market to record the fair value. In the absence of a quoted market price or net asset value of an identical security, the fair value is determined using pricing models or net asset values based on observable market inputs and quoted market prices of securities with similar characteristics. PacifiCorp's long-term debt is carried at cost on the Consolidated Balance Sheets. The fair value of PacifiCorp's long-term debt is a Level 2 fair value measurement and has been estimated based upon quoted market prices, where available, or at the present value of future cash flows discounted at rates consistent with comparable maturities with similar credit risks. The carrying value of PacifiCorp's variable-rate long-term debt approximates fair value because of the frequent repricing of these instruments at market rates. The following table presents the carrying value and estimated fair value of PacifiCorp's long-term debt as of December 31 (in millions): 2020 2019 Carrying Fair Carrying Fair Value Value Value Value Long-term debt $ 8,612 $ 10,995 $ 7,658 $ 9,280
MidAmerican Energy Company [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Measurements [Text Block]	The carrying value of MidAmerican Energy's cash, certain cash equivalents, receivables, payables, accrued liabilities and short-term borrowings approximates fair value because of the short-term maturity of these instruments. MidAmerican Energy has various financial assets and liabilities that are measured at fair value on the Financial Statements using inputs from the three levels of the fair value hierarchy. A financial asset or liability classification within the hierarchy is determined based on the lowest level input that is significant to the fair value measurement. The three levels are as follows: • Level 1 - Inputs are unadjusted quoted prices in active markets for identical assets or liabilities that MidAmerican Energy has the ability to access at the measurement date. • Level 2 - Inputs include quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not active, inputs other than quoted prices that are observable for the asset or liability and inputs that are derived principally from or corroborated by observable market data by correlation or other means (market corroborated inputs). • Level 3 - Unobservable inputs reflect MidAmerican Energy's judgments about the assumptions market participants would use in pricing the asset or liability since limited market data exists. MidAmerican Energy develops these inputs based on the best information available, including its own data. The following table presents MidAmerican Energy's assets and liabilities recognized on the Balance Sheets and measured at fair value on a recurring basis (in millions): Input Levels for Fair Value Measurements Level 1 Level 2 Level 3 Other (1) Total As of December 31, 2020: Assets: Commodity derivatives $ — $ 4 $ 5 $ (5) $ 4 Money market mutual funds (2) 41 — — — 41 Debt securities: United States government obligations 200 — — — 200 International government obligations — 5 — — 5 Corporate obligations — 73 — — 73 Municipal obligations — 2 — — 2 Agency, asset and mortgage-backed obligations — 6 — — 6 Equity securities: United States companies 381 — — — 381 International companies 9 — — — 9 Investment funds 17 — — — 17 $ 648 $ 90 $ 5 $ (5) $ 738 Liabilities - commodity derivatives $ — $ (4) $ (3) $ 5 $ (2) As of December 31, 2019 Assets: Commodity derivatives $ — $ 2 $ 1 $ (1) $ 2 Money market mutual funds (2) 274 — — — 274 Debt securities: United States government obligations 189 — — — 189 International government obligations — 4 — — 4 Corporate obligations — 58 — — 58 Municipal obligations — 1 — — 1 Agency, asset and mortgage-backed obligations — 1 — — 1 Equity securities: United States companies 336 — — — 336 International companies 9 — — — 9 Investment funds 15 — — — 15 $ 823 $ 66 $ 1 $ (1) $ 889 Liabilities - commodity derivatives $ — $ (9) $ — $ 2 $ (7) (1) Represents netting under master netting arrangements and a net cash collateral receivable of $— million and $1 million as of December 31, 2020 and 2019, respectively. (2) Amounts are included in cash and cash equivalents and investments and restricted investments on the Balance Sheets. The fair value of these money market mutual funds approximates cost. MidAmerican Energy's investments in money market mutual funds and debt and equity securities are stated at fair value, with debt securities accounted for as available-for-sale securities. When available, a readily observable quoted market price or net asset value of an identical security in an active market is used to record the fair value. In the absence of a quoted market price or net asset value of an identical security, the fair value is determined using pricing models or net asset values based on observable market inputs and quoted market prices of securities with similar characteristics. MidAmerican Energy's long-term debt is carried at cost on the Financial Statements. The fair value of MidAmerican Energy's long-term debt is a Level 2 fair value measurement and has been estimated based upon quoted market prices, where available, or at the present value of future cash flows discounted at rates consistent with comparable maturities with similar credit risks. The carrying value of MidAmerican Energy's variable-rate long-term debt approximates fair value because of the frequent repricing of these instruments at market rates. The following table presents the carrying value and estimated fair value of MidAmerican Energy's long-term debt as of December 31 (in millions): 2020 2019 Carrying Value Fair Value Carrying Value Fair Value Long-term debt $ 7,210 $ 9,130 $ 7,208 $ 8,283
MidAmerican Funding, LLC and Subsidiaries [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Measurements [Text Block]	Refer to Note 12 of MidAmerican Energy's Notes to Financial Statements. MidAmerican Funding's long-term debt is carried at cost on the Consolidated Financial Statements. The fair value of MidAmerican Funding's long-term debt is a Level 2 fair value measurement and has been estimated based upon quoted market prices, where available, or at the present value of future cash flows discounted at rates consistent with comparable maturities with similar credit risks. The carrying value of MidAmerican Funding's variable-rate long-term debt approximates fair value because of the frequent repricing of these instruments at market rates. The following table presents the carrying value and estimated fair value of MidAmerican Funding's long-term debt as of December 31 (in millions): 2020 2019 Carrying Value Fair Value Carrying Value Fair Value Long-term debt $ 7,450 $ 9,466 $ 7,448 $ 8,599
Nevada Power Company [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Measurements [Text Block]	Fair Value Measurements The carrying value of Nevada Power's cash, certain cash equivalents, receivables, payables, accrued liabilities and short-term borrowings approximates fair value because of the short-term maturity of these instruments. Nevada Power has various financial assets and liabilities that are measured at fair value on the Consolidated Balance Sheets using inputs from the three levels of the fair value hierarchy. A financial asset or liability classification within the hierarchy is determined based on the lowest level input that is significant to the fair value measurement. The three levels are as follows: • Level 1 - Inputs are unadjusted quoted prices in active markets for identical assets or liabilities that Nevada Power has the ability to access at the measurement date. • Level 2 - Inputs include quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not active, inputs other than quoted prices that are observable for the asset or liability and inputs that are derived principally from or corroborated by observable market data by correlation or other means (market corroborated inputs). • Level 3 - Unobservable inputs reflect Nevada Power's judgments about the assumptions market participants would use in pricing the asset or liability since limited market data exists. Nevada Power develops these inputs based on the best information available, including its own data. The following table presents Nevada Power's assets and liabilities recognized on the Consolidated Balance Sheets and measured at fair value on a recurring basis (in millions): Input Levels for Fair Value Measurements Level 1 Level 2 Level 3 Total As of December 31, 2020: Assets: Commodity derivatives $ — $ — $ 26 $ 26 Money market mutual funds (1) 21 — — 21 Investment funds 2 — — 2 $ 23 $ — $ 26 $ 49 Liabilities - commodity derivatives $ — $ — $ (11) $ (11) As of December 31, 2019: Assets: Money market mutual funds (1) 10 — — 10 Investment funds 2 — — 2 $ 12 $ — $ — $ 12 Liabilities - commodity derivatives $ — $ — $ (8) $ (8) (1) Amounts are included in cash and cash equivalents on the Consolidated Balance Sheets. The fair value of these money market mutual funds approximates cost. Derivative contracts are recorded on the Consolidated Balance Sheets as either assets or liabilities and are stated at estimated fair value unless they are designated as normal purchases or normal sales and qualify for the exception afforded by GAAP. When available, the fair value of derivative contracts is estimated using unadjusted quoted prices for identical contracts in the market in which Nevada Power transacts. When quoted prices for identical contracts are not available, Nevada Power uses forward price curves. Forward price curves represent Nevada Power's estimates of the prices at which a buyer or seller could contract today for delivery or settlement at future dates. Nevada Power bases its forward price curves upon internally developed models, with internal and external fundamental data inputs. Market price quotations for certain electricity and natural gas trading hubs are not as readily obtainable due to markets that are not active. Given that limited market data exists for these contracts, Nevada Power uses forward price curves derived from internal models based on perceived pricing relationships to major trading hubs that are based on unobservable inputs. The model incorporates a mid-market pricing convention (the mid‑point price between bid and ask prices) as a practical expedient for valuing its assets and liabilities measured and reported at fair value. The determination of the fair value for derivative contracts not only includes counterparty risk, but also the impact of Nevada Power's nonperformance risk on its liabilities, which as of December 31, 2020, had an immaterial impact to the fair value of its derivative contracts. As such, Nevada Power considers its derivative contracts to be valued using Level 3 inputs. Nevada Power's investments in money market mutual funds and equity securities are accounted for as available-for-sale securities and are stated at fair value. When available, a readily observable quoted market price or net asset value of an identical security in an active market is used to record the fair value. The following table reconciles the beginning and ending balances of Nevada Power's net commodity derivative assets or liabilities measured at fair value on a recurring basis using significant Level 3 inputs for the years ended December 31 (in millions): 2020 2019 2018 Beginning balance $ (8) $ 3 $ (3) Changes in fair value recognized in regulatory assets or liabilities (17) (21) 4 Settlements 40 10 2 Ending balance $ 15 $ (8) $ 3 Nevada Power's long-term debt is carried at cost on the Consolidated Balance Sheets. The fair value of Nevada Power's long-term debt is a Level 2 fair value measurement and has been estimated based upon quoted market prices, where available, or at the present value of future cash flows discounted at rates consistent with comparable maturities with similar credit risks. The carrying value of Nevada Power's variable-rate long-term debt approximates fair value because of the frequent repricing of these instruments at market rates. The following table presents the carrying value and estimated fair value of Nevada Power's long-term debt as of December 31 (in millions): 2020 2019 Carrying Fair Carrying Fair Value Value Value Value Long-term debt $ 2,496 $ 3,245 $ 2,351 $ 2,848
Sierra Pacific Power Company [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Measurements [Text Block]	Fair Value Measurements The carrying value of Sierra Pacific's cash, certain cash equivalents, receivables, payables, accrued liabilities and short-term borrowings approximates fair value because of the short-term maturity of these instruments. Sierra Pacific has various financial assets and liabilities that are measured at fair value on the Balance Sheets using inputs from the three levels of the fair value hierarchy. A financial asset or liability classification within the hierarchy is determined based on the lowest level input that is significant to the fair value measurement. The three levels are as follows: • Level 1 - Inputs are unadjusted quoted prices in active markets for identical assets or liabilities that Sierra Pacific has the ability to access at the measurement date. • Level 2 - Inputs include quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not active, inputs other than quoted prices that are observable for the asset or liability and inputs that are derived principally from or corroborated by observable market data by correlation or other means (market corroborated inputs). • Level 3 - Unobservable inputs reflect Sierra Pacific's judgments about the assumptions market participants would use in pricing the asset or liability since limited market data exists. Sierra Pacific develops these inputs based on the best information available, including its own data. The following table presents Sierra Pacific's assets and liabilities recognized on the Balance Sheets and measured at fair value on a recurring basis (in millions): Input Levels for Fair Value Measurements Level 1 Level 2 Level 3 Total As of December 31, 2020: Assets: Commodity derivatives $ — $ — $ 9 $ 9 Money market mutual funds (1) 17 — — 17 Investment funds $ — $ 17 $ — $ 9 $ 26 Liabilities - commodity derivatives $ — $ — $ (2) $ (2) As of December 31, 2019: Assets - money market mutual funds (1) $ 25 $ — $ — $ 25 Liabilities - commodity derivatives $ — $ — $ (1) $ (1) (1) Amounts are included in cash and cash equivalents on the Balance Sheets. The fair value of these money market mutual funds approximates cost. Sierra Pacific's investments in money market mutual funds and equity securities are accounted for as available-for-sale securities and are stated at fair value. When available, a readily observable quoted market price or net asset value of an identical security in an active market is used to record the fair value. Sierra Pacific's long-term debt is carried at cost on the Balance Sheets. The fair value of Sierra Pacific's long-term debt is a Level 2 fair value measurement and has been estimated based upon quoted market prices, where available, or at the present value of future cash flows discounted at rates consistent with comparable maturities with similar credit risks. The carrying value of Sierra Pacific's variable-rate long-term debt approximates fair value because of the frequent repricing of these instruments at market rates. The following table presents the carrying value and estimated fair value of Sierra Pacific's long-term debt as of December 31 (in millions): 2020 2019 Carrying Fair Carrying Fair Value Value Value Value Long-term debt $ 1,164 $ 1,358 $ 1,135 $ 1,258
Eastern Energy Gas Holdings, LLC [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Measurements [Text Block]	Fair Value Measurements The carrying value of Eastern Energy Gas' cash, certain cash equivalents, receivables, payables, accrued liabilities and short-term borrowings approximates fair value because of the short-term maturity of these instruments. Eastern Energy Gas has various financial assets and liabilities that are measured at fair value on the Consolidated Financial Statements using inputs from the three levels of the fair value hierarchy. A financial asset or liability classification within the hierarchy is determined based on the lowest level input that is significant to the fair value measurement. The three levels are as follows: • Level 1 - Inputs are unadjusted quoted prices in active markets for identical assets or liabilities that Eastern Energy Gas has the ability to access at the measurement date. • Level 2 - Inputs include quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not active, inputs other than quoted prices that are observable for the asset or liability and inputs that are derived principally from or corroborated by observable market data by correlation or other means (market corroborated inputs). • Level 3 - Unobservable inputs reflect Eastern Energy Gas' judgments about the assumptions market participants would use in pricing the asset or liability since limited market data exists. Eastern Energy Gas develops these inputs based on the best information available, including its own data. Derivative contracts are recorded on the Consolidated Balance Sheets as either assets or liabilities and are stated at estimated fair value unless they are designated as normal purchase or normal sales and qualify for the exception afforded by GAAP. When available, the fair value of derivative contracts is estimated using unadjusted quoted prices for identical contracts in the market in which Eastern Energy Gas transacts. When quoted prices for identical contracts are not available, Eastern Energy Gas uses forward price curves. Forward price curves represent Eastern Energy Gas' estimates of the prices at which a buyer or seller could contract today for delivery or settlement at future dates. Eastern Energy Gas bases its forward price curves upon market price quotations, when available, or internally developed and commercial models, with internal and external fundamental data inputs. Market price quotations are obtained from independent brokers, exchanges, direct communication with market participants and actual transactions executed by Eastern Energy Gas. Market price quotations are generally readily obtainable for the applicable term of Eastern Energy Gas' outstanding derivative contracts; therefore, Eastern Energy Gas' forward price curves reflect observable market quotes. Market price quotations for certain natural gas trading hubs are not as readily obtainable due to the length of the contracts. Given that limited market data exists for these contracts, as well as for those contracts that are not actively traded, Eastern Energy Gas uses forward price curves derived from internal models based on perceived pricing relationships to major trading hubs that are based on unobservable inputs. The estimated fair value of these derivative contracts is a function of underlying forward commodity prices, interest rates, currency rates, related volatility, counterparty creditworthiness and duration of contracts. All of Eastern Energy Gas' derivatives are considered Level 2 in the fair value hierarchy. Eastern Energy Gas' long-term debt is carried at cost, including unamortized premiums, discounts and debt issuance costs as applicable, on the Consolidated Financial Statements. The fair value of Eastern Energy Gas' long-term debt is a Level 2 fair value measurement and has been estimated based upon quoted market prices, where available, or at the present value of future cash flows discounted at rates consistent with comparable maturities with similar credit risks. The carrying value of Eastern Energy Gas' variable-rate long-term debt approximates fair value because of the frequent repricing of these instruments at market rates. The following table presents the carrying value and estimated fair value of Eastern Energy Gas' long-term debt as of December 31 (in millions): 2020 2019 Carrying Fair Carrying Fair Value Value Value Value Long-term debt $ 4,425 $ 5,012 $ 5,520 $ 5,738
[1]	Amounts are included in cash and cash equivalents; other current assets; and noncurrent investments and restricted cash and investments on the Consolidated Balance Sheets. The fair value of these money market mutual funds approximates cost.
[2]	Represents netting under master netting arrangements and a net cash collateral receivable of $35 million and $79 million as of December 31, 2020 and 2019, respectively.

Other, Net (Notes)

Other, Net (Notes)	12 Months Ended
	Dec. 31, 2020
MidAmerican Energy Company [Member]
Component of Other Income (Expense), Nonoperating [Line Items]
Other, Net [Text Block]	Other, net, as shown on the Statements of Operations, includes the following other income (expense) items for the years ended December 31 (in millions): 2020 2019 2018 Non-service cost components of postretirement employee benefit plans $ 24 $ 17 $ 21 Corporate-owned life insurance income 16 24 6 Gains on disposition of assets 6 — — Interest income and other, net 6 9 3 Total $ 52 $ 50 $ 30
MidAmerican Funding, LLC and Subsidiaries [Member]
Component of Other Income (Expense), Nonoperating [Line Items]
Other, Net [Text Block]	Other, net, as shown on the Consolidated Statements of Operations, includes the following other income (expense) items for the years ended December 31 (in millions): 2020 2019 2018 Non-service cost components of postretirement employee benefit plans $ 24 $ 17 $ 21 Corporate-owned life insurance income 16 24 6 Gains on disposition of assets 6 — — Interest income and other, net 6 11 4 Total $ 52 $ 52 $ 31

Income Taxes (Notes)

Income Taxes (Notes)	12 Months Ended
	Dec. 31, 2020
Schedule of Effective Income Tax Rate Reconciliation [Line Items]
Income Taxes [Text Block]	Income Taxes The Company's provision for income taxes has been computed on a stand-alone basis. Berkshire Hathaway includes the Company in its consolidated United States federal and Iowa state income tax returns and the majority of the Company's United States federal income tax is remitted to or received from Berkshire Hathaway. As of December 31, 2020, the Company had a current income tax receivable from Berkshire Hathaway for federal income tax of $13 million and a long-term income tax receivable from Berkshire Hathaway, reflected as a component of BHE's shareholders' equity, of $658 million for Iowa state income tax. As of December 31, 2019, the Company had a current income tax payable to Berkshire Hathaway for federal income tax of $76 million and a long-term income tax receivable from Berkshire Hathaway, reflected as a component of BHE's shareholders' equity, of $530 million for Iowa state income tax. Additionally, for the years ended December 31, 2020 and 2019 the Company generated $138 million and $79 million, respectively, of state of Iowa net operating losses which were carried forward and increased the long-term income tax receivable from Berkshire Hathaway. The BHE GT&S acquisition on November 1, 2020 was treated as a deemed asset acquisition for federal and state income tax purposes due to Berkshire Hathaway and DEI making tax elections under Internal Revenue Code ("IRC") §338(h)(10) for all C-corporations acquired, the intent on making or having in place IRC §754 elections for any partnership interests purchased, and due to all single member LLCs acquired being treated as disregarded entities for income tax purposes. All deferred taxes at BHE GT&S were reset to reflect book and tax basis differences as of November 1, 2020. The primary deferred tax items recorded by the Company include long-term debt, pension and other postretirement liabilities, and intangible assets. Since the BHE GT&S acquisition is deemed an asset acquisition for federal and state income tax purposes, all of the approximately $0.9 billion of tax goodwill is amortizable over 15 years. At the acquisition date there is no deferred tax liability recorded for the difference between book goodwill of approximately $1.7 billion versus the tax goodwill of approximately $0.9 billion, due to the inability to record a deferred tax liability when book goodwill exceeds tax goodwill. Iowa Senate File 2417 In May 2018, Iowa Senate File 2417 was signed into law, which, among other items, reduces the state of Iowa corporate tax rate from 12% to 9.8% and eliminates corporate federal deductibility, both for tax years starting in 2021. GAAP requires the effect on deferred tax assets and liabilities of a change in tax rates be recognized in the period the tax rate change was enacted. As a result of Iowa Senate File 2417, the Company reduced deferred income tax liabilities $61 million and decreased deferred income tax expense by $2 million. As it is probable the change in deferred taxes for the Company's regulated businesses will be passed back to customers through regulatory mechanisms, the Company increased net regulatory liabilities by $59 million. In connection with Iowa Senate File 2417, the Company determined it was more appropriate to present the deferred income tax assets of $609 million associated with the state of Iowa net operating loss carryforward as a long-term income tax receivable from Berkshire Hathaway as a component of BHE's shareholders' equity. As the Company does not currently expect to receive the majority of the income tax amounts from Berkshire Hathaway related to the state of Iowa prior to the 2021 effective date, the Company remeasured the long-term income tax receivable with Berkshire Hathaway at the enactment date and recorded a decrease to the long-term income tax receivable from Berkshire Hathaway of $115 million. Subsequent to the remeasurement date, the Company amended the tax sharing agreement with Berkshire Hathaway and received $90 million in 2019 related to previously used state of Iowa net operating loss carryforwards. Income tax (benefit) expense consists of the following for the years ended December 31 (in millions): 2020 2019 2018 Current: Federal $ (1,537) $ (956) $ (686) State (121) (13) (9) Foreign 86 81 104 (1,572) (888) (591) Deferred: Federal 1,438 431 165 State 424 (127) (131) Foreign 21 (8) (20) 1,883 296 14 Investment tax credits (3) (6) (6) Total $ 308 $ (598) $ (583) A reconciliation of the federal statutory income tax rate to the effective income tax rate applicable to income before income tax expense (benefit) is as follows for the years ended December 31: 2020 2019 2018 Federal statutory income tax rate 21 % 21 % 21 % Income tax credits (16) (32) (30) Effects of ratemaking (3) (6) (8) State income tax, net of federal income tax benefit 3 (5) (6) Effects of tax rate change and repatriation tax — — (4) Income tax effect of foreign income — (2) (3) Equity income — — 1 Other, net (1) (1) (1) Effective income tax rate 4 % (25) % (30) % Income tax credits relate primarily to production tax credits ("PTC") from wind-powered generating facilities owned by MidAmerican Energy, PacifiCorp and BHE Renewables. Federal renewable electricity PTCs are earned as energy from qualifying wind-powered generating facilities is produced and sold and are based on a per-kilowatt hour rate pursuant to the applicable federal income tax law. Wind-powered generating facilities are eligible for the credits for 10 years from the date the qualifying generating facilities are placed in-service. Income tax effect on foreign income includes, among other items, a deferred income tax charge of $35 million in 2020 related to the United Kingdom's corporate income tax rate that was scheduled to decrease from 19% to 17% effective April 1, 2020; however, the rate was maintained at 19% through amended legislation enacted in July 2020. The net deferred income tax liability consists of the following as of December 31 (in millions): 2020 2019 Deferred income tax assets: Regulatory liabilities $ 1,420 $ 1,610 Federal, state and foreign carryforwards 677 575 AROs 304 306 Other 777 590 Total deferred income tax assets 3,178 3,081 Valuation allowances (204) (143) Total deferred income tax assets, net 2,974 2,938 Deferred income tax liabilities: Property-related items (10,816) (10,439) Investments (2,821) (1,137) Regulatory assets (785) (631) Other (327) (384) Total deferred income tax liabilities (14,749) (12,591) Net deferred income tax liability $ (11,775) $ (9,653) The following table provides the Company's net operating loss and tax credit carryforwards and expiration dates as of December 31, 2020 (in millions): Federal State Foreign Total Net operating loss carryforwards (1) $ 302 $ 7,190 $ 704 $ 8,196 Deferred income taxes on net operating loss carryforwards 63 409 162 634 Expiration dates 2021 - indefinite 2021 - indefinite 2021 - 2039 Tax credits $ 15 $ 28 $ — $ 43 Expiration dates 2023 - 2026 2021 - indefinite (1) The federal net operating loss carryforwards relate principally to net operating loss carryforwards of subsidiaries that are tax residents in both the United States and the United Kingdom. The federal net operating loss carryforwards were generated prior to Berkshire Hathaway Inc.'s ownership and will begin to expire in 2021. The United States Internal Revenue Service has closed or effectively settled its examination of the Company's income tax returns through December 31, 2013. The statute of limitations for the Company's income tax returns have expired through December 31, 2009, for Utah, through December 31, 2011, for California, Michigan, Minnesota, Montana, Nebraska, Oregon and Wisconsin, and through December 31, 2016, except for the impact of any federal audit adjustments, for Connecticut, Idaho, Illinois, Iowa, Kansas and New York. The closure of examinations, or the expiration of the statute of limitations, for state filings may not preclude the state from adjusting the state net operating loss carryforward utilized in a year for which the statute of limitations is not closed. A reconciliation of the beginning and ending balances of the Company's net unrecognized tax benefits is as follows for the years ended December 31 (in millions): 2020 2019 Beginning balance $ 145 $ 185 Additions based on tax positions related to the current year 5 3 Additions for tax positions of prior years 6 13 Reductions for tax positions of prior years (1) (37) Statute of limitations (4) (9) Settlements 1 (5) Interest and penalties 1 (5) Ending balance $ 153 $ 145 As of December 31, 2020 and 2019, the Company had unrecognized tax benefits totaling $141 million and $139 million, respectively, that if recognized, would have an impact on the effective tax rate. The remaining unrecognized tax benefits relate to tax positions for which ultimate deductibility is highly certain but for which there is uncertainty as to the timing of such deductibility. Recognition of these tax benefits, other than applicable interest and penalties, would not affect the Company's effective income tax rate.
PacifiCorp [Member]
Schedule of Effective Income Tax Rate Reconciliation [Line Items]
Income Taxes [Text Block]	Income Taxes Income tax expense (benefit) consists of the following for the years ended December 31 (in millions): 2020 2019 2018 Current: Federal $ 19 $ 158 $ 164 State 30 34 40 Total 49 192 204 Deferred: Federal (124) (132) (187) State 1 4 (9) Total (123) (128) (196) Investment tax credits (1) (3) (3) Total income tax (benefit) expense $ (75) $ 61 $ 5 A reconciliation of the federal statutory income tax rate to the effective income tax rate applicable to income before income tax expense is as follows for the years ended December 31: 2020 2019 2018 Federal statutory income tax rate 21 % 21 % 21 % State income taxes, net of federal income tax benefit 3 3 4 Effects of ratemaking (22) (13) (17) Federal income tax credits (13) (3) (7) Other — (1) — Effective income tax rate (11) % 7 % 1 % Income tax credits relate primarily to production tax credits ("PTC") earned by PacifiCorp's wind-powered generating facilities. Federal renewable electricity PTCs are earned as energy from qualifying wind-powered generating facilities is produced and sold and are based on a per-kilowatt hour rate pursuant to the applicable federal income tax law. Wind-powered generating facilities are eligible for the credits for ten years from the date the qualifying generating facilities are placed in-service. Effects of ratemaking is primarily attributable to use of excess deferred income taxes of $118 million, $91 million and $127 million for 2020, 2019 and 2018, respectively, to accelerate depreciation of certain retired wind equipment and coal-fueled generating units and to amortize certain regulatory asset balances in accordance with regulatory orders issued in Utah, Oregon, and Idaho. The net deferred income tax liability consists of the following as of December 31 (in millions): 2020 2019 Deferred income tax assets: Regulatory liabilities $ 700 $ 731 Employee benefits 93 83 Derivative contracts and unamortized contract values 17 33 State carryforwards 73 70 Loss contingencies 63 3 Asset retirement obligations 65 61 Other 66 65 1,077 1,046 Deferred income tax liabilities: Property, plant and equipment (3,311) (3,312) Regulatory assets (343) (276) Other (50) (21) (3,704) (3,609) Net deferred income tax liability $ (2,627) $ (2,563) The following table provides PacifiCorp's net operating loss and tax credit carryforwards and expiration dates as of December 31, 2020 (in millions): State Net operating loss carryforwards $ 1,138 Deferred income taxes on net operating loss carryforwards $ 53 Expiration dates 2023 - 2032 Tax credit carryforwards $ 20 Expiration dates 2021 - indefinite The United States Internal Revenue Service has closed or effectively settled its examination of PacifiCorp's income tax returns through December 31, 2013. The statute of limitations for PacifiCorp's state income tax returns have expired through December 31, 2011, with the exception of Utah, for which the statute has expired through December 31, 2009. In addition, Idaho's statute of limitations has expired through December 31, 2016, except for the impact of any federal audit adjustments. The statute of limitations expiring for state filings may not preclude the state from adjusting the state net operating loss carryforward utilized in a year for which the statute of limitations is not closed.
MidAmerican Energy Company [Member]
Schedule of Effective Income Tax Rate Reconciliation [Line Items]
Income Taxes [Text Block]	MidAmerican Energy's income tax benefit consists of the following for the years ended December 31 (in millions): 2020 2019 2018 Current: Federal $ (684) $ (478) $ (276) State (94) (47) (12) (778) (525) (288) Deferred: Federal 201 166 42 State 8 (11) (8) 209 155 34 Investment tax credits (1) (1) (1) Total $ (570) $ (371) $ (255) A reconciliation of the federal statutory income tax rate to MidAmerican Energy's effective income tax rate applicable to income before income tax benefit is as follows for the years ended December 31: 2020 2019 2018 Federal statutory income tax rate 21 % 21 % 21 % Income tax credits (199) (90) (73) State income tax, net of federal income tax benefit (27) (11) (4) Effects of ratemaking (17) (8) (5) Other, net (1) — 1 Effective income tax rate (223) % (88) % (60) % Income tax credits relate primarily to production tax credits ("PTC") earned by MidAmerican Energy's wind-powered generating facilities. Federal renewable electricity PTCs are earned as energy from qualifying wind-powered generating facilities is produced and sold and are based on a per-kilowatt hour rate pursuant to the applicable federal income tax law. Wind-powered generating facilities are eligible for the credits for 10 years from the date the qualifying generating facilities are placed in-service. MidAmerican Energy's net deferred income tax liability consists of the following as of December 31 (in millions): 2020 2019 Deferred income tax assets: Regulatory liabilities $ 288 $ 368 Asset retirement obligations 229 234 State carryforwards 52 51 Employee benefits 42 26 Other 40 34 Total deferred income tax assets 651 713 Valuation allowances (25) (14) Total deferred income tax assets, net 626 699 Deferred income tax liabilities: Depreciable property (3,583) (3,253) Regulatory assets (97) (68) Other — (4) Total deferred income tax liabilities (3,680) (3,325) Net deferred income tax liability $ (3,054) $ (2,626) As of December 31, 2020, MidAmerican Energy's state tax carryforwards, principally related to $768 million of net operating losses, expire at various intervals between 2021 and 2039. The United States Internal Revenue Service has closed or effectively settled its examination of MidAmerican Energy's income tax returns through December 31, 2013. The statute of limitations for MidAmerican Energy's state income tax returns have expired through December 31, 2011, for Michigan and Nebraska, and through December 31, 2016, for Illinois, Indiana, Iowa, Kansas and Missouri, except for the impact of any federal audit adjustments. The statute of limitations expiring for state filings may not preclude the state from adjusting the state net operating loss carryforward utilized in a year for which the statute of limitations is not closed. A reconciliation of the beginning and ending balances of MidAmerican Energy's net unrecognized tax benefits is as follows for the years ended December 31 (in millions): 2020 2019 Beginning balance $ 8 $ 10 Additions based on tax positions related to the current year 4 5 Additions for tax positions of prior years — 10 Reductions based on tax positions related to the current year (3) (5) Reductions for tax positions of prior years (1) (12) Ending balance $ 8 $ 8 As of December 31, 2020, MidAmerican Energy had unrecognized tax benefits totaling $26 million that, if recognized, would have an impact on the effective tax rate. The remaining unrecognized tax benefits relate to tax positions for which ultimate deductibility is highly certain but for which there is uncertainty as to the timing of such deductibility. Recognition of these tax benefits, other than applicable interest and penalties, would not affect MidAmerican Energy's effective income tax rate.
MidAmerican Funding, LLC and Subsidiaries [Member]
Schedule of Effective Income Tax Rate Reconciliation [Line Items]
Income Taxes [Text Block]	MidAmerican Funding's income tax benefit consists of the following for the years ended December 31 (in millions): 2020 2019 2018 Current: Federal $ (689) $ (480) $ (280) State (96) (49) (14) (785) (529) (294) Deferred: Federal 204 164 42 State 8 (11) (9) 212 153 33 Investment tax credits (1) (1) (1) Total $ (574) $ (377) $ (262) A reconciliation of the federal statutory income tax rate to MidAmerican Funding's effective income tax rate applicable to income before income tax benefit is as follows for the years ended December 31: 2020 2019 2018 Federal statutory income tax rate 21 % 21 % 21 % Income tax credits (209) (94) (76) State income tax, net of federal income tax benefit (29) (12) (4) Effects of ratemaking (17) (8) (6) Other, net (1) — 1 Effective income tax rate (235) % (93) % (64) % Income tax credits relate primarily to production tax credits ("PTC") earned by MidAmerican Energy's wind-powered generating facilities. Federal renewable electricity PTCs are earned as energy from qualifying wind-powered generating facilities is produced and sold and are based on a per-kilowatt hour rate pursuant to the applicable federal income tax law. Wind-powered generating facilities are eligible for the credits for 10 years from the date the qualifying generating facilities are placed in-service. MidAmerican Funding's net deferred income tax liability consists of the following as of December 31 (in millions): 2020 2019 Deferred income tax assets: Regulatory liabilities $ 288 $ 368 Asset retirement obligations 229 234 State carryforwards 52 51 Employee benefits 43 26 Other 40 39 Total deferred income tax assets 652 718 Valuation allowances (25) (14) Total deferred income tax assets, net 627 704 Deferred income tax liabilities: Depreciable property (3,583) (3,253) Regulatory assets (97) (68) Other 1 (4) Total deferred income tax liabilities (3,679) (3,325) Net deferred income tax liability $ (3,052) $ (2,621) As of December 31, 2020, MidAmerican Funding's state tax carryforwards, principally related to $768 million of net operating losses, expire at various intervals between 2021 and 2039. The United States Internal Revenue Service has closed or effectively settled its examination MidAmerican Funding's income tax returns through December 31, 2013. The statute of limitations for MidAmerican Funding's state income tax returns have expired through December 31, 2011, for Michigan and Nebraska, and through December 31, 2016, for Illinois, Indiana, Iowa, Kansas and Missouri, except for the impact of any federal audit adjustments. The statute of limitations expiring for state filings may not preclude the state from adjusting the state net operating loss carryforward utilized in a year for which the statute of limitations is not closed. A reconciliation of the beginning and ending balances of MidAmerican Funding's net unrecognized tax benefits is as follows for the years ended December 31 (in millions): 2020 2019 Beginning balance $ 8 $ 10 Additions based on tax positions related to the current year 4 5 Additions for tax positions of prior years — 10 Reductions based on tax positions related to the current year (3) (5) Reductions for tax positions of prior years (1) (12) Ending balance $ 8 $ 8 As of December 31, 2020, MidAmerican Funding had unrecognized tax benefits totaling $26 million that, if recognized, would have an impact on the effective tax rate. The remaining unrecognized tax benefits relate to tax positions for which ultimate deductibility is highly certain but for which there is uncertainty as to the timing of such deductibility. Recognition of these tax benefits, other than applicable interest and penalties, would not affect MidAmerican Funding's effective income tax rate.
Nevada Power Company [Member]
Schedule of Effective Income Tax Rate Reconciliation [Line Items]
Income Taxes [Text Block]	Income Taxes Income tax expense (benefit) consists of the following for the years ended December 31 (in millions): 2020 2019 2018 Current – Federal $ 57 $ 105 $ 84 Deferred – Federal (10) (31) (13) Uncertain tax positions — — 2 Investment tax credits — (1) (1) Total income tax expense $ 47 $ 73 $ 72 A reconciliation of the federal statutory income tax rate to the effective income tax rate applicable to income before income tax expense is as follows for the years ended December 31: 2020 2019 2018 Federal statutory income tax rate 21 % 21 % 21 % Effects of ratemaking (8) — — Non-deductible expenses — — 3 Other 1 1 — Effective income tax rate 14 % 22 % 24 % The net deferred income tax liability consists of the following as of December 31 (in millions): 2020 2019 Deferred income tax assets: Regulatory liabilities $ 206 $ 211 Operating and finance leases 79 99 Employee benefits 8 14 Customer advances 19 19 Other 15 9 Total deferred income tax assets 327 352 Deferred income tax liabilities: Property related items (800) (797) Regulatory assets (176) (166) Operating and finance leases (76) (95) Other (13) (8) Total deferred income tax liabilities (1,065) (1,066) Net deferred income tax liability $ (738) $ (714) The United States Internal Revenue Service has closed its examination of NV Energy's consolidated income tax returns through December 31, 2008, and effectively settled its examination of Nevada Power's income tax return for the short year ended December 31, 2013, and the statute of limitations has expired for NV Energy's consolidated income tax returns through the short year ended December 19, 2013. The closure or effective settlement of examinations, or the expiration of the statute of limitations may not preclude the Internal Revenue Service from adjusting the federal net operating loss carryforward utilized in a year for which the examination is not closed.
Sierra Pacific Power Company [Member]
Schedule of Effective Income Tax Rate Reconciliation [Line Items]
Income Taxes [Text Block]	Income Taxes Income tax expense (benefit) consists of the following for the years ended December 31 (in millions): 2020 2019 2018 Current – Federal $ 3 $ 19 $ 23 Deferred – Federal 12 10 7 Uncertain tax positions — — 1 Investment tax credits — (1) (1) Total income tax expense $ 15 $ 28 $ 30 A reconciliation of the federal statutory income rate to the effective income tax rate applicable to income before income tax expense is as follows for the years ended December 31: 2020 2019 2018 Federal statutory income tax rate 21 % 21 % 21 % Effects of ratemaking (9) — — Non-deductible expenses — — 4 Effective income tax rate 12 % 21 % 25 % The net deferred income tax liability consists of the following as of December 31 (in millions): 2020 2019 Deferred income tax assets: Regulatory liabilities $ 67 $ 70 Employee benefit plans 2 6 Operating and finance leases 30 13 Customer advances 10 9 Other 8 6 Total deferred income tax assets 117 104 Deferred income tax liabilities: Property related items (380) (370) Regulatory assets (74) (62) Operating and finance leases (30) (13) Other (7) (6) Total deferred income tax liabilities (491) (451) Net deferred income tax liability $ (374) $ (347) The United States Internal Revenue Service has closed its examination of NV Energy's consolidated income tax returns through December 31, 2008, and effectively settled its examination of Sierra Pacific's income tax return for the short year ended December 31, 2013, and the statute of limitations has expired for NV Energy's consolidated income tax returns through the short year ended December 19, 2013. The closure or effective settlement of examinations, or the expiration of the statute of limitations may not preclude the Internal Revenue Service from adjusting the federal net operating loss carryforward utilized in a year for which the examination is not closed.
Eastern Energy Gas Holdings, LLC [Member]
Schedule of Effective Income Tax Rate Reconciliation [Line Items]
Income Taxes [Text Block]	Income Taxes Income tax (benefit) expense consists of the following for the years ended December 31 (in millions): 2020 2019 2018 Current: Federal $ (20) $ 130 $ (227) State 1 17 31 (19) 147 (196) Deferred: Federal 23 (36) 337 State (28) (10) (17) (5) (46) 320 Total $ (24) $ 101 $ 124 Income tax expense reported in discontinued operations for the year ended December 31, 2019 was $33 million. Income tax expense reported in discontinued operations for year ended December 31, 2018 was less than $1 million. A reconciliation of the federal statutory income tax rate to the effective income tax rate applicable to income before income tax (benefit) expense is as follows for the years ended December 31: 2020 2019 2018 Federal statutory income tax rate 21 % 21 % 21 % State income tax, net of federal income tax benefit (13) 1 2 Equity interest 4 1 2 Effects of ratemaking (2) (1) (1) Federal legislative changes — — (1) Change in tax status (9) (4) — AFUDC-equity (1) (1) — Absence of noncontrolling interest (16) (3) (5) Write-off of regulatory assets 3 — — Other, net 1 (1) — Effective income tax rate (12) % 13 % 18 % For the year ended December 31, 2020, Eastern Energy Gas' effective tax rate is primarily a function of the nominal year-to-date pre-tax income driven by charges associated with the Supply Header Project, as discussed in Note 7. In addition, the effective tax rate reflects an income tax benefit of $24 million associated with finalizing the effects of changes in tax status of certain subsidiaries in connection with the Dominion Energy Gas Restructuring. The net deferred income tax asset (liability) consists of the following as of December 31 (in millions): 2020 2019 Deferred income tax assets: Employee benefits $ 30 $ 15 Intangibles 148 — Derivatives and hedges 18 28 Regulatory liabilities 1 4 Deferred revenues 1 4 Other 2 2 Total deferred income tax assets 200 53 Valuation allowance — (1) Total deferred income tax assets, net 200 52 Deferred income tax liabilities: Property related items (52) (695) Partnership investments (19) (438) Pension benefits (1) (202) Debt issuance discount (8) — Other (1) (5) Total deferred income tax liabilities (81) (1,340) Net deferred income tax asset (liability) (1) $ 119 $ (1,288) (1) Net deferred income tax asset as of December 31, 2020 is presented in other assets in the Consolidated Balance Sheet. The net deferred income tax liability decreased significantly due to the GT&S Transaction. The acquisition was treated as a deemed asset sale for federal and state income tax purposes. All deferred taxes at Eastern Energy Gas were reset to reflect financial and tax basis differences as of November 1, 2020. Through October 31, 2020, Eastern Energy Gas was included in DEI's consolidated federal income tax return and, where applicable, combined state income tax returns. The United States Internal Revenue Service has closed its examination of Eastern Energy Gas' consolidated income tax returns through December 31, 2018. The statute of limitations for Eastern Energy Gas' state tax returns have expired through December 31, 2016, with the exception of Pennsylvania, New York and West Virginia, for which the earliest remaining open tax years are December 31, 2012, December 31, 2015, and December 31, 2017, respectively. DEI is responsible for income taxes, including any adjustments resulting from its audit examinations, prior to the GT&S Transaction. A reconciliation of the beginning and ending balances of Eastern Energy Gas' net unrecognized tax benefits is as follows for the years ended December 31 (in millions): 2020 2019 Beginning balance $ 2 $ 2 Additions for tax positions of prior years 5 — Reductions for unrecognized tax benefits retained by DEI (7) — Ending balance $ — $ 2

Supplemental Cash Flow Disclosu

Supplemental Cash Flow Disclosures Supplemental Cash Flow Disclosures (Notes)	12 Months Ended
	Dec. 31, 2020
Condensed Cash Flow Statements, Captions [Line Items]
Supplemental Cash Flow Disclosures [Text Block]	Supplemental Cash Flow Disclosures Cash and Cash Equivalents and Restricted Cash and Cash Equivalents Cash equivalents consist of funds invested in money market mutual funds, United States Treasury Bills and other investments with a maturity of three months or less when purchased. Cash and cash equivalents exclude amounts where availability is restricted by legal requirements, loan agreements or other contractual provisions. Restricted cash and cash equivalents as of December 31, 2020 and December 31, 2019, consist substantially of funds restricted for the purpose of constructing solid waste facilities under tax-exempt bond obligation agreements and debt service obligations for certain of the Company's nonregulated renewable energy projects. A reconciliation of cash and cash equivalents and restricted cash and cash equivalents as of December 31, 2020 and December 31, 2019, as presented in the Consolidated Statements of Cash Flows is outlined below and disaggregated by the line items in which they appear on the Consolidated Balance Sheets (in millions): As of December 31, 2020 2019 Cash and cash equivalents $ 1,290 $ 1,040 Restricted cash and cash equivalents 140 212 Investments and restricted cash and cash equivalents and investments 15 16 Total cash and cash equivalents and restricted cash and cash equivalents $ 1,445 $ 1,268 The summary of supplemental cash flow disclosures as of and for the years ending December 31 is as follows (in millions): 2020 2019 2018 Supplemental disclosure of cash flow information: Interest paid, net of amounts capitalized $ 1,855 $ 1,723 $ 1,713 Income taxes received, net (1) $ 1,361 $ 850 $ 780 Supplemental disclosure of non-cash investing and financing transactions: Accruals related to property, plant and equipment additions $ 801 $ 888 $ 823 (1) Includes $1,504 million, $942 million and $884 million of income taxes received from Berkshire Hathaway in 2020, 2019 and 2018, respectively.
PacifiCorp [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Supplemental Cash Flow Disclosures [Text Block]	Supplemental Cash Flow Disclosures Cash and Cash Equivalents and Restricted Cash and Cash Equivalents A reconciliation of cash and cash equivalents and restricted cash and cash equivalents as of December 31, 2020 and 2019, as presented in the Consolidated Statements of Cash Flows is outlined below and disaggregated by the line items in which they appear on the Consolidated Balance Sheets (in millions): 2020 2019 Cash and cash equivalents $ 13 $ 30 Restricted cash included in other current assets 4 4 Restricted cash included in other assets 2 2 Total cash and cash equivalents and restricted cash and cash equivalents $ 19 $ 36 The summary of supplemental cash flow disclosures as of and for the years ended December 31 is as follows (in millions): 2020 2019 2018 Interest paid, net of amounts capitalized $ 348 $ 340 $ 347 Income taxes paid, net $ 107 $ 171 $ 144 Supplemental disclosure of non-cash investing and financing activities: Accounts payable related to property, plant and equipment additions $ 344 $ 293 $ 184
MidAmerican Energy Company [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Supplemental Cash Flow Disclosures [Text Block]	Cash equivalents consist of funds invested in money market mutual funds, United States Treasury Bills and other investments with a maturity of three months or less when purchased. Cash and cash equivalents exclude amounts where availability is restricted by legal requirements, loan agreements or other contractual provisions. Restricted cash and cash equivalents as of December 31, 2020 consist substantially of funds restricted for wildlife preservation and, additionally, as of December 31, 2019, for the purpose of constructing solid waste facilities under tax-exempt bond obligation agreements. A reconciliation of cash and cash equivalents and restricted cash and cash equivalents as of December 31, 2020 and 2019 as presented in the Statements of Cash Flows is outlined below and disaggregated by the line items in which they appear on the Balance Sheets (in millions): As of December 31, 2020 2019 Cash and cash equivalents $ 38 $ 287 Restricted cash and cash equivalents in other current assets 7 43 Total cash and cash equivalents and restricted cash and cash equivalents $ 45 $ 330 The summary of supplemental cash flow disclosures as of and for the years ending December 31 is as follows (in millions): 2020 2019 2018 Supplemental cash flow information: Interest paid, net of amounts capitalized $ 286 $ 224 $ 198 Income taxes received, net $ 709 $ 450 $ 494 Supplemental disclosure of non-cash investing transactions: Accounts payable related to utility plant additions $ 227 $ 337 $ 371
MidAmerican Funding, LLC and Subsidiaries [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Supplemental Cash Flow Disclosures [Text Block]	Cash equivalents consist of funds invested in money market mutual funds, United States Treasury Bills and other investments with a maturity of three months or less when purchased. Cash and cash equivalents exclude amounts where availability is restricted by legal requirements, loan agreements or other contractual provisions. Restricted cash and cash equivalents as of December 31, 2020 consist substantially of funds restricted for wildlife preservation and, additionally, as of December 31, 2019, for the purpose of constructing solid waste facilities under tax-exempt bond obligation agreements. A reconciliation of cash and cash equivalents and restricted cash and cash equivalents as of December 31, 2020 and 2019 as presented in the Consolidated Statements of Cash Flows is outlined below and disaggregated by the line items in which they appear on the Consolidated Balance Sheets (in millions): As of December 31, 2020 2019 Cash and cash equivalents $ 39 $ 288 Restricted cash and cash equivalents in other current assets 7 43 Total cash and cash equivalents and restricted cash and cash equivalents $ 46 $ 331 The summary of supplemental cash flow information as of and for the years ending December 31 is as follows (in millions): 2020 2019 2018 Supplemental cash flow information: Interest paid, net of amounts capitalized $ 302 $ 245 $ 218 Income taxes received, net $ 715 $ 456 $ 511 Supplemental disclosure of non-cash investing and financing transactions: Accounts payable related to utility plant additions $ 227 $ 337 $ 371 Distribution of corporate aircraft to parent $ — $ 8 $ —
Nevada Power Company [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Supplemental Cash Flow Disclosures [Text Block]	Supplemental Cash Flow Disclosures Cash and Cash Equivalents and Restricted Cash and Cash Equivalents Cash equivalents consist of funds invested in money market mutual funds, United States Treasury Bills and other investments with a maturity of three months or less when purchased. Cash and cash equivalents exclude amounts where availability is restricted by legal requirements, loan agreements or other contractual provisions. Restricted cash and cash equivalents as of December 31, 2020 and December 31, 2019, consist of funds restricted by the PUCN for a certain renewable energy contract. A reconciliation of cash and cash equivalents and restricted cash and cash equivalents as of December 31, 2020 and December 31, 2019, as presented in the Consolidated Statements of Cash Flows is outlined below and disaggregated by the line items in which they appear on the Consolidated Balance Sheets (in millions): As of December 31, December 31, 2020 2019 Cash and cash equivalents $ 25 $ 15 Restricted cash and cash equivalents included in other current assets 11 10 Total cash and cash equivalents and restricted cash and cash equivalents $ 36 $ 25 The summary of supplemental cash flow disclosures as of and for the years ended December 31 is as follows (in millions): 2020 2019 2018 Supplemental disclosure of cash flow information: Interest paid, net of amounts capitalized $ 115 $ 126 $ 166 Income taxes paid $ 50 $ 113 $ 117 Supplemental disclosure of non-cash investing and financing transactions: Accruals related to property, plant and equipment additions $ 32 $ 49 $ 34
Sierra Pacific Power Company [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Supplemental Cash Flow Disclosures [Text Block]	Supplemental Cash Flow Disclosures Cash and Cash Equivalents and Restricted Cash and Cash Equivalents Cash equivalents consist of funds invested in money market mutual funds, United States Treasury Bills and other investments with a maturity of three months or less when purchased. Cash and cash equivalents exclude amounts where availability is restricted by legal requirements, loan agreements or other contractual provisions. Restricted cash and cash equivalents as of December 31, 2020 and December 31, 2019, consist of funds restricted by the PUCN for a certain renewable energy contract. A reconciliation of cash and cash equivalents and restricted cash and cash equivalents as of December 31, 2020 and December 31, 2019, as presented in the Statements of Cash Flows is outlined below and disaggregated by the line items in which they appear on the Balance Sheets (in millions): As of December 31, December 31, 2020 2019 Cash and cash equivalents $ 19 $ 27 Restricted cash and cash equivalents included in other current assets 7 5 Total cash and cash equivalents and restricted cash and cash equivalents $ 26 $ 32 The summary of supplemental cash flow disclosures as of and for the years ended December 31 is as follows (in millions): 2020 2019 2018 Supplemental disclosure of cash flow information: Interest paid, net of amounts capitalized $ 42 $ 41 $ 41 Income taxes paid $ 2 $ 37 $ 19 Supplemental disclosure of non-cash investing and financing transactions: Accruals related to property, plant and equipment additions $ 17 $ 18 $ 15
Eastern Energy Gas Holdings, LLC [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Supplemental Cash Flow Disclosures [Text Block]	Supplemental Cash Flow Disclosures Cash and Cash Equivalents and Restricted Cash and Cash Equivalents Cash equivalents consist of funds invested in money market mutual funds, United States Treasury Bills and other investments with a maturity of three months or less when purchased. Cash and cash equivalents exclude amounts where availability is restricted by legal requirements, loan agreements or other contractual provisions. Restricted cash and cash equivalents as of December 31, 2020 and December 31, 2019 consist substantially of customer deposits. A reconciliation of cash and cash equivalents and restricted cash and cash equivalents as of December 31, 2020 and December 31, 2019, as presented in the Consolidated Statements of Cash Flows is outlined below and disaggregated by the line items in which they appear on the Consolidated Balance Sheets (in millions): As of December 31, December 31, 2020 2019 Cash and cash equivalents $ 35 $ 27 Restricted cash and cash equivalents 13 12 Total cash and cash equivalents and restricted cash and cash equivalents $ 48 $ 39 The summary of supplemental cash flow disclosures as of and for the years ending December 31 is as follows (in millions): 2020 2019 2018 Supplemental disclosure of cash flow information: Interest paid, net of amounts capitalized $ 317 $ 291 $ 162 Income taxes paid $ 31 $ 65 $ 79 Supplemental disclosure of non-cash investing and financing transactions: Accruals related to property, plant and equipment additions $ 30 $ 25 $ 59 Distribution of Questar Pipeline Group $ (699) $ — $ — Distribution of 50% interest in Cove Point $ (2,765) $ — $ — Acquisition of Eastern Energy Gas by BHE $ 343 $ — $ — Equity contributions $ — $ — $ 23

Related Party Transactions (Not

Related Party Transactions (Notes)	12 Months Ended
	Dec. 31, 2020
PacifiCorp [Member]
Related Party Transaction [Line Items]
Related Party Transactions Disclosure [Text Block]	Related-Party Transactions PacifiCorp has an intercompany administrative services agreement and a mutual assistance agreement with BHE and its subsidiaries. Amounts charged to PacifiCorp by BHE and its subsidiaries under this agreement totaled $10 million, $10 million and $12 million during the years ended December 31, 2020, 2019 and 2018, respectively. Payables associated with these services were $5 million and $1 million as of December 31, 2020 and 2019, respectively. Amounts charged by PacifiCorp to BHE and its subsidiaries under this agreement totaled $4 million, $1 million and $2 million during the years ended December 31, 2020, 2019 and 2018, respectively. In 2020, PacifiCorp acquired wind turbines from BHE Wind, LLC, an indirect wholly owned subsidiary of BHE, for $147 million. The wind turbines are being installed as part of newly constructed and repowered wind-powered generating facilities that are being placed in service through 2021. PacifiCorp also engages in various transactions with several subsidiaries of BHE in the ordinary course of business. Services provided by these subsidiaries in the ordinary course of business and charged to PacifiCorp primarily relate to wholesale electricity purchases and transmission of electricity, transportation of natural gas and employee relocation services. These expenses totaled $6 million, $7 million and $8 million during the years ended December 31, 2020, 2019 and 2018, respectively. PacifiCorp has long-term transportation contracts with BNSF Railway Company ("BNSF"), an indirect wholly owned subsidiary of Berkshire Hathaway, PacifiCorp's ultimate parent company. Transportation costs under these contracts were $29 million, $35 million and $33 million during the years ended December 31, 2020, 2019 and 2018, respectively. PacifiCorp is party to a tax-sharing agreement and is part of the Berkshire Hathaway consolidated United States federal income tax return. Federal and state income taxes were $25 million receivable from BHE and $31 million payable to BHE, as of December 31, 2020 and 2019, respectively. For the years ended December 31, 2020, 2019 and 2018, cash paid for federal and state income taxes to BHE totaled $107 million, $171 million and $144 million, respectively. PacifiCorp transacts with its equity investees, Bridger Coal and Trapper Mining Inc. Services provided by equity investees to PacifiCorp primarily relate to coal purchases. During the years ended December 31, 2020, 2019 and 2018, coal purchases from PacifiCorp's equity investees totaled $145 million, $155 million and $163 million, respectively. Payables to PacifiCorp's equity investees were $14 million and $12 million as of December 31, 2020 and 2019, respectively.
MidAmerican Energy Company [Member]
Related Party Transaction [Line Items]
Related Party Transactions Disclosure [Text Block]	The companies identified as affiliates of MidAmerican Energy are Berkshire Hathaway and its subsidiaries, including BHE and its subsidiaries. The basis for the following transactions is provided for in service agreements between MidAmerican Energy and the affiliates. MidAmerican Energy is reimbursed for charges incurred on behalf of its affiliates. The majority of these reimbursed expenses are for general costs, such as insurance and building rent, and for employee wages, benefits and costs related to corporate functions such as information technology, human resources, treasury, legal and accounting. The amount of such reimbursements was $47 million, $43 million and $51 million for 2020, 2019 and 2018, respectively. Additionally, in 2018, MidAmerican Energy received $15 million from BHE for the transfer of a corporate aircraft. MidAmerican Energy reimbursed BHE in the amount of $15 million, $14 million and $11 million in 2020, 2019 and 2018, respectively, for its share of corporate expenses. MidAmerican Energy purchases, in the normal course of business at either tariffed or market prices, natural gas transportation and storage capacity services from Northern Natural Gas Company, a wholly owned subsidiary of BHE, and coal transportation services from BNSF Railway Company, an indirect wholly owned subsidiary of Berkshire Hathaway. These purchases totaled $129 million, $139 million and $127 million in 2020, 2019 and 2018, respectively. Additionally, in 2020, MidAmerican Energy paid $7 million to BHE Renewables, LLC, a wholly owned subsidiary of BHE, for the purchase of wind turbine components. MidAmerican Energy had accounts receivable from affiliates of $12 million and $6 million as of December 31, 2020 and 2019, respectively, that are included in other current assets on the Balance Sheets. MidAmerican Energy also had accounts payable to affiliates of $13 million and $11 million as of December 31, 2020 and 2019, respectively, that are included in accounts payable on the Balance Sheets. MidAmerican Energy is party to a tax-sharing agreement and is part of the Berkshire Hathaway consolidated United States federal income tax return. For current federal and state income taxes, MidAmerican Energy had a payable to BHE of $14 million and $82 million as of December 31, 2020 and 2019, respectively. MidAmerican Energy received net cash receipts for federal and state income taxes from BHE totaling $709 million, $450 million and $494 million for the years ended December 31, 2020, 2019 and 2018, respectively. MidAmerican Energy recognizes the full amount of the funded status for its pension and postretirement plans, and amounts attributable to MidAmerican Energy's affiliates that have not previously been recognized through income are recognized as an intercompany balance with such affiliates. MidAmerican Energy adjusts these balances when changes to the funded status of the respective plans are recognized and does not intend to settle the balances currently. Amounts receivable from affiliates attributable to the funded status of employee benefit plans totaled $146 million and $23 million as of December 31, 2020 and 2019, respectively, and are included in other assets on the Balance Sheets. Similar amounts payable to affiliates totaled $49 million and $47 million as of December 31, 2020 and 2019, respectively, and are included in other long-term liabilities on the Balance Sheets. See Note 10 for further information pertaining to pension and postretirement accounting.
MidAmerican Funding, LLC and Subsidiaries [Member]
Related Party Transaction [Line Items]
Related Party Transactions Disclosure [Text Block]	The companies identified as affiliates of MidAmerican Funding are Berkshire Hathaway and its subsidiaries, including BHE and its subsidiaries. The basis for the following transactions is provided for in service agreements between MidAmerican Funding and the affiliates. MidAmerican Funding is reimbursed for charges incurred on behalf of its affiliates. The majority of these reimbursed expenses are for allocated general costs, such as insurance and building rent, and for employee wages, benefits and costs for corporate functions, such as information technology, human resources, treasury, legal and accounting. The amount of such reimbursements was $46 million, $41 million and $44 million for 2020, 2019 and 2018, respectively. Additionally, in 2018, MidAmerican Funding received $15 million from BHE for the transfer of corporate aircraft owned by MidAmerican Energy and, in 2019, recorded a noncash dividend of $8 million for the transfer to BHE of corporate aircraft owned by MHC. MidAmerican Funding reimbursed BHE in the amount of $15 million, $14 million and $11 million in 2020, 2019 and 2018, respectively, for its share of corporate expenses. MidAmerican Energy purchases, in the normal course of business at either tariffed or market prices. natural gas transportation and storage capacity services from Northern Natural Gas Company, a wholly owned subsidiary of BHE and coal transportation services from BNSF Railway Company, a wholly-owned subsidiary of Berkshire Hathaway. These purchases totaled $129 million, $139 million and $127 million in 2020, 2019 and 2018, respectively. Additionally, in 2020, MidAmerican Energy paid $7 million to BHE Renewables, LLC, a wholly owned subsidiary of BHE, for the purchase of wind turbine components. MHC has a $300 million revolving credit arrangement carrying interest at the 30-day London Interbank Offered Rate ("LIBOR") rate plus a spread to borrow from BHE. Outstanding balances are unsecured and due on demand. The outstanding balance was $177 million at an interest rate of 0.397% as of December 31, 2020, and $171 million at an interest rate of 1.944% as of December 31, 2019, and is reflected as note payable to affiliate on the Consolidated Balance Sheet. BHE has a $100 million revolving credit arrangement, carrying interest at the 30-day LIBOR rate plus a spread to borrow from MHC. Outstanding balances are unsecured and due on demand. There were no borrowings outstanding throughout 2020 and 2019. MidAmerican Funding had accounts receivable from affiliates of $13 million and $7 million as of December 31, 2020 and 2019, respectively, that are included in other current assets on the Consolidated Balance Sheets. MidAmerican Funding also had accounts payable to affiliates of $13 million and $11 million as of December 31, 2020 and 2019, respectively, that are included in accounts payable on the Consolidated Balance Sheets. MidAmerican Funding is party to a tax-sharing agreement and is part of the Berkshire Hathaway consolidated United States federal income tax return. For current federal and state income taxes, MidAmerican Funding had a payable to BHE of $14 million and $83 million as of December 31, 2020 and 2019, respectively. MidAmerican Funding received net cash receipts for federal and state income taxes from BHE totaling $715 million, $456 million and $511 million for the years ended December 31, 2020, 2019 and 2018, respectively. MidAmerican Funding recognizes the full amount of the funded status for its pension and postretirement plans, and amounts attributable to MidAmerican Funding's affiliates that have not previously been recognized through income are recognized as an intercompany balance with such affiliates. MidAmerican Funding adjusts these balances when changes to the funded status of the respective plans are recognized and does not intend to settle the balances currently. Amounts receivable from affiliates attributable to the funded status of employee benefit plans totaled $146 million and $23 million as of December 31, 2020 and 2019, respectively, and are included in other assets on the Consolidated Balance Sheets. Similar amounts payable to affiliates totaled $49 million and $47 million as of December 31, 2020 and 2019, respectively, and are included in other long-term liabilities on the Consolidated Balance Sheets. See Note 10 for further information pertaining to pension and postretirement accounting. The indenture pertaining to MidAmerican Funding's long-term debt restricts MidAmerican Funding from paying a distribution on its equity securities, unless after making such distribution either its debt to total capital ratio does not exceed 0.67:1.0 and its interest coverage ratio is not less than 2.2:1.0 or its senior secured long-term debt rating is at least BBB or its equivalent. MidAmerican Funding may seek a release from this restriction upon delivery to the indenture trustee of written confirmation from the ratings agencies that without this restriction MidAmerican Funding's senior secured long-term debt would be rated at least BBB+.
Nevada Power Company [Member]
Related Party Transaction [Line Items]
Related Party Transactions Disclosure [Text Block]	Related Party Transactions Nevada Power has an intercompany administrative services agreement with BHE and its subsidiaries. Amounts charged to Nevada Power under this agreement totaled $2 million for the years ended December 31, 2020, 2019 and 2018. Kern River Gas Transmission Company, an indirect subsidiary of BHE, provided natural gas transportation and other services to Nevada Power of $52 million, $52 million and $58 million for the years ended December 31, 2020, 2019 and 2018. As of December 31, 2020 and 2019, Nevada Power's Consolidated Balance Sheets included amounts due to Kern River Gas Transmission Company of $4 million. Nevada Power provided electricity and other services to PacifiCorp, an indirect subsidiary of BHE, of $3 million, $2 million and $3 million for the years ended December 31, 2020, 2019 and 2018, respectively. Receivables associated with these services were $— million as of December 31, 2020 and 2019. PacifiCorp provided electricity and the sale of renewable energy credits to Nevada Power of $1 million for the year ended December 31, 2020 and $— million for the years ended December 31, 2019 and 2018. Payables associated with these transactions were $— million as of December 31, 2020 and 2019. Nevada Power provided electricity to Sierra Pacific of $106 million, $84 million and $91 million for the years ended December 31, 2020, 2019 and 2018, respectively. Receivables associated with these transactions were $13 million and $5 million as of December 31, 2020 and 2019, respectively. Nevada Power purchased electricity from Sierra Pacific of $34 million, $25 million and $28 million for the years ended December 31, 2020, 2019 and 2018, respectively. Payables associated with these transactions were $1 million as of December 31, 2020 and 2019. Nevada Power incurs intercompany administrative and shared facility costs with NV Energy and Sierra Pacific. These transactions are governed by an intercompany service agreement and are priced at cost. Nevada Power provided services to NV Energy of $— million, $— million and $1 million for each of the years ending December 31, 2020, 2019 and 2018, respectively. NV Energy provided services to Nevada Power of $9 million, $9 million and $7 million for the years ending December 31, 2020, 2019 and 2018, respectively. Nevada Power provided services to Sierra Pacific of $26 million, $26 million and $28 million for the years ended December 31, 2020, 2019 and 2018, respectively. Sierra Pacific provided services to Nevada Power of $15 million, $14 million and $15 million for the years ended December 31, 2020, 2019 and 2018, respectively. As of December 31, 2020 and 2019, Nevada Power's Consolidated Balance Sheets included amounts due to NV Energy of $28 million and $26 million, respectively. There were no receivables due from NV Energy as of December 31, 2020 and 2019. As of December 31, 2020 and 2019, Nevada Power's Consolidated Balance Sheets included receivables due from Sierra Pacific of $2 million and $3 million, respectively. There were no payables due to Sierra Pacific as of December 31, 2020 and 2019. Nevada Power is party to a tax-sharing agreement with NV Energy and NV Energy is part of the Berkshire Hathaway consolidated United States federal income tax return. As of December 31, 2020 and 2019 federal income taxes receivable from NV Energy were $— million and $7 million, respectively Nevada Power made cash payments of $50 million, $113 million and $117 million for federal income taxes for the years ended December 31, 2020, 2019 and 2018, respectively. Certain disbursements for accounts payable and payroll are made by NV Energy on behalf of Nevada Power and reimbursed automatically when settled by the bank. These amounts are recorded as accounts payable at the time of disbursement.
Sierra Pacific Power Company [Member]
Related Party Transaction [Line Items]
Related Party Transactions Disclosure [Text Block]	Related Party Transactions Sierra Pacific has an intercompany administrative services agreement with BHE and its subsidiaries. Amounts charged to Sierra Pacific under this agreement totaled $1 million for the years ended December 31, 2020, 2019 and 2018. Sierra Pacific provided electricity to Nevada Power of $34 million, $25 million and $28 million for the years ended December 31, 2020, 2019 and 2018, respectively. Receivables associated with these transactions were $1 million as of December 31, 2020 and 2019. Sierra Pacific purchased electricity from Nevada Power of $106 million, $84 million and $91 million for the years ended December 31, 2020, 2019 and 2018, respectively. Payables associated with these transactions were $13 million and $5 million as of December 31, 2020 and 2019, respectively. Sierra Pacific incurs intercompany administrative and shared facility costs with NV Energy and Nevada Power. These transactions are governed by an intercompany service agreement and are priced at cost. NV Energy provided services to Sierra Pacific of $5 million, $4 million and $4 million for the years ending December 31, 2020, 2019 and 2018, respectively. Sierra Pacific provided services to Nevada Power of $15 million, $14 million, and $15 million for the years ended December 31, 2020, 2019 and 2018, respectively. Nevada Power provided services to Sierra Pacific of $26 million, $26 million, and $28 million for the years ended December 31, 2020, 2019 and 2018, respectively. As of December 31, 2020 and 2019, Sierra Pacific's Balance Sheets included amounts due to NV Energy of $17 million and $15 million, respectively. There were no receivables due from NV Energy as of December 31, 2020 and 2019. As of December 31, 2020 and 2019, Sierra Pacific's Balance Sheets included payables due to Nevada Power of $2 million and $3 million, respectively. There were no receivables due from Nevada Power as of December 31, 2020 and 2019. Sierra Pacific is party to a tax-sharing agreement with NV Energy and NV Energy is part of the Berkshire Hathaway consolidated United States federal income tax return. As of December 31, 2020 and 2019 federal income taxes receivable from NV Energy were $7 million and $14 million, respectively. Sierra Pacific made cash payments of $2 million, $37 million, and $19 million for federal income taxes for the years ended December 31, 2020, 2019 and 2018, respectively.
Eastern Energy Gas Holdings, LLC [Member]
Related Party Transaction [Line Items]
Related Party Transactions Disclosure [Text Block]	Related-Party Transactions Transactions Prior to the GT&S Transaction Prior to the GT&S Transaction, Eastern Energy Gas engaged in related party transactions primarily with other DEI subsidiaries (affiliates). Eastern Energy Gas' receivable and payable balances with affiliates were settled based on contractual terms or on a monthly basis, depending on the nature of the underlying transactions. Through October 31, 2020, Eastern Energy Gas was included in DEI's consolidated federal income tax return and, where applicable, combined income tax returns for DEI are filed in various states. As of December 31, 2019, Eastern Energy Gas had a net affiliated receivable of $209 million due from DEI, representing $212 million of federal income taxes receivable from DEI and $3 million of state income taxes payable to DEI. In addition, Eastern Energy Gas' Consolidated Balance Sheet as of December 31, 2019 includes $10 million of state income taxes receivable. All affiliate payables or receivables were settled with DEI prior to the closing date of the GT&S Transaction. Eastern Energy Gas transacted with affiliates for certain quantities of natural gas and other commodities at market prices in the ordinary course of business. Additionally, Eastern Energy Gas provided transportation and storage services to affiliates. Eastern Energy Gas also entered into certain other contracts with affiliates, and related parties, including construction services, which were presented separately from contracts involving commodities or services. As of December 31, 2019, Eastern Energy Gas did not have any commodity derivative assets and liabilities with affiliates. See Notes 14 and 18 for more information. See Note 3 for information regarding the Dominion Energy Gas Restructuring, an affiliated transaction. Eastern Energy Gas participated in certain DEI benefit plans as described in Note 12. As of December 31, 2019, Eastern Energy Gas' amount due from DEI associated with the Dominion Energy Pension Plan and reflected in other assets on the Consolidated Balance Sheet was $326 million. Eastern Energy Gas' amount due from DEI associated with the Dominion Energy Retiree Health and Welfare Plan and reflected in other assets on the Consolidated Balance Sheet was $17 million as of December 31, 2019. DES, Carolina Gas Services, DEQPS and other affiliates provided accounting, legal, finance and certain administrative and technical services to Eastern Energy Gas. Eastern Energy Gas provided certain services to related parties, including technical services. The financial statements for all years presented include costs for certain general, administrative and corporate expenses assigned by DES, Carolina Gas Services and DEQPS to Eastern Energy Gas on the basis of direct and allocated methods in accordance with Eastern Energy Gas' services agreements with DES, Carolina Gas Services and DEQPS. Where costs incurred cannot be determined by specific identification, the costs were allocated based on the proportional level of effort devoted by DES, Carolina Gas Services and DEQPS resources that is attributable to the entity, determined by reference to number of employees, salaries and wages and other similar measures for the relevant DES service. Management believes the assumptions and methodologies underlying the allocation of general corporate overhead expenses are reasonable. Subsequent to the GT&S Transaction, and with the exception of Cove Point, Eastern Energy Gas' transactions with other DEI subsidiaries are no longer related-party transactions. Presented below are Eastern Energy Gas' significant transactions with DES, Carolina Gas Services, DEQPS and other affiliated and related parties for the years ended December 31 (in millions): 2020 2019 2018 Sales of natural gas and transportation and storage services $ 207 $ 249 $ 168 Purchases of natural gas and transportation and storage services 10 12 — Services provided by related parties (1) 129 226 169 Services provided to related parties (2) 83 164 260 (1) Includes capitalized expenditures of $14 million, $19 million and $37 million for the years ended December 31, 2020, 2019 and 2018, respectively. (2) Includes amounts attributable to Atlantic Coast Pipeline, a related-party VIE prior to the GT&S Transaction. See below for more information. The following table presents affiliated and related party balances as of December 31 (in millions): 2019 Other receivables (1) $ 7 Imbalances receivable from affiliates (2) 8 Imbalances payable to affiliates (3) 1 Other assets 12 (1) Represents amounts due from Atlantic Coast Pipeline. (2) Amounts are presented in other current assets on the Consolidated Balance Sheet. (3) Amounts are presented in other current liabilities on the Consolidated Balance Sheet. EGTS provided services to Atlantic Coast Pipeline, which totaled $46 million, $103 million and $203 million for the years ended December 31, 2020, 2019 and 2018, respectively, included in operating revenue in the Consolidated Statements of Operations. Trade receivables, net as of December 31, 2019 included $22 million of accrued unbilled revenue, respectively. This revenue is based on estimated amounts of services provided but not yet billed to various affiliates. Interest income related to the affiliated notes receivable under the DEI money pool was $3 million for the year ended December 31, 2020. Interest income on affiliated notes receivable from East Ohio and EGP borrowings under intercompany revolving credit agreements with Eastern Energy Gas was $14 million and $15 million for the years ended December 31, 2019 and 2018, respectively. In 2018, in connection with the closing of a $3.0 billion term loan, Cove Point loaned DEI $3.0 billion in exchange for a promissory note. Interest income related to DEI's borrowing was $82 million and $21 million for the years ended December 31, 2019 and 2018, respectively. In September 2019, DEI repaid the promissory note to Cove Point and the proceeds were used by Cove Point to repay its $3.0 billion term loan. Eastern Energy Gas' affiliated notes receivable from DEI totaled $1.8 billion as of December 31, 2019. In August 2020, DEI repaid the remaining principal balance outstanding. Interest income on the promissory notes was $32 million and $5 million for the years ended December 31, 2020 and 2019, respectively. As of December 31, 2019, Eastern Energy Gas' affiliated notes receivable from East Ohio totaled $1.7 billion. In June 2020, East Ohio repaid the remaining principal balance outstanding. Interest income on these promissory notes was $33 million, $72 million and $64 million for the years ended December 31, 2020, 2019 and 2018, respectively. Eastern Energy Gas' borrowings under an intercompany revolving credit agreement with DEI totaled $251 million as of December 31, 2019, with a weighted average interest rate of 2.02%. Interest charges related to Eastern Energy Gas' total borrowings from DEI were $3 million, $3 million and less than $1 million for the years ended December 31, 2020, 2019 and 2018, respectively. Interest charges related to DCP's total borrowings from DEI totaled $94 million and $96 million for the years ended December 31, 2019 and 2018, respectively. DCP had borrowings of $9 million with DES as of December 31, 2019, with a weighted-average interest rate of 3.85%. Interest related to DCP's total borrowings from DES totaled $3 million, $3 million and $1 million for the years ended December 31, 2020, 2019 and 2018, respectively. Interest charges related to Northeast Midstream's promissory note with DEI were $10 million for the year ended December 31, 2019. For the years ended December 31, 2020, 2019 and 2018, Eastern Energy Gas, including entities acquired in the Dominion Energy Gas Restructuring, distributed $4.3 billion, $603 million and $230 million to DEI, respectively. Transactions Subsequent to the GT&S Transaction Eastern Energy Gas is party to a tax-sharing agreement and is part of the Berkshire Hathaway consolidated United States federal income tax return. For current federal and state income taxes, Eastern Energy Gas had a receivable from BHE of $20 million as of December 31, 2020. Eastern Energy Gas received net cash receipts for federal and state income taxes from BHE totaling $76 million for the year ended December 31, 2020. DEI, BHE, MidAmerican Energy, Northern Natural Gas Company and other related parties provided accounting, human resources, information technology and certain other administrative and technical services to Eastern Energy Gas, which totaled $4 million for the year ended December 31, 2020. Eastern Energy Gas provided certain services to affiliates, including administrative and technical services, which totaled $7 million for the year ended December 31, 2020. Eastern Energy Gas also provided transportation and storage services to affiliates, which totaled $4 million for the year ended December 31, 2020. Other assets included amounts due from an affiliate of $7 million as of December 31, 2020. Eastern Energy Gas has a $400 million intercompany revolving credit agreement from its parent, BHE GT&S, expiring in November 2021. The credit facility, which is for general corporate purposes and provide for the issuance of letters of credit, has a variable interest rate based on London Interbank Offered Rate ("LIBOR") plus a fixed spread. As of December 31, 2020, $9 million was outstanding under the credit agreement, with a weighted average interest rate of 0.55%. BHE GT&S has a $200 million intercompany revolving credit agreement from Eastern Energy Gas expiring in December 2021. The credit agreement has a variable interest rate based on LIBOR plus a fixed spread. As of December 31, 2020, $124 million was outstanding under the credit agreement. Eastern Energy Gas participates in certain MidAmerican Energy benefit plans as described in Note 12. As of December 31, 2020, Eastern Energy Gas' amount due to MidAmerican Energy associated with these plans and reflected in other long-term liabilities on the Consolidated Balance Sheet was $115 million.

Employee Benefit Plans (Notes)

Employee Benefit Plans (Notes)	12 Months Ended
	Dec. 31, 2020
Defined Benefit Plan Disclosure [Line Items]
Employee Benefit Plans [Text Block]	Employee Benefit Plans Defined Benefit Plans Domestic Operations PacifiCorp, MidAmerican Energy and NV Energy sponsor defined benefit pension plans that cover a majority of all employees of BHE and its domestic energy subsidiaries. These pension plans include noncontributory defined benefit pension plans, supplemental executive retirement plans ("SERP") and restoration plans. PacifiCorp, MidAmerican Energy and NV Energy also provide certain postretirement healthcare and life insurance benefits through various plans to eligible retirees. On November 1, 2020, BHE completed its acquisition of substantially all of the natural gas transmission and storage business of DEI and Dominion Questar, exclusive of the Questar Pipeline Group (the "GT&S Transaction"). Defined benefit pension and postretirement benefits provided to the employees of BHE GT&S, which were part of the GT&S Transaction completed on November 1, 2020, are administered in the respective plans sponsored by MidAmerican Energy. Initial pension and postretirement plan liabilities of $81 million and $37 million, respectively, resulted from the GT&S Transaction. Net Periodic Benefit Cost For purposes of calculating the expected return on plan assets, a market-related value is used. The market-related value of plan assets is generally calculated by spreading the difference between expected and actual investment returns over a five-year period beginning after the first year in which they occur. Net periodic benefit cost for the plans included the following components for the years ended December 31 (in millions): Pension Other Postretirement 2020 2019 2018 2020 2019 2018 Service cost $ 17 $ 16 $ 21 $ 7 $ 8 $ 9 Interest cost 93 111 105 21 27 24 Expected return on plan assets (140) (154) (164) (34) (40) (41) Settlement — — 21 — — — Net amortization 32 31 28 (4) (6) (13) Net periodic benefit cost (credit) $ 2 $ 4 $ 11 $ (10) $ (11) $ (21) Funded Status The following table is a reconciliation of the fair value of plan assets for the years ended December 31 (in millions): Pension Other Postretirement 2020 2019 2020 2019 Plan assets at fair value, beginning of year $ 2,656 $ 2,396 $ 742 $ 664 Employer contributions 13 12 3 2 Participant contributions — — 8 9 Actual return on plan assets 373 456 40 122 Settlement — (22) — — Benefits paid (218) (186) (49) (55) Plan assets at fair value, end of year $ 2,824 $ 2,656 $ 744 $ 742 The following table is a reconciliation of the benefit obligations for the years ended December 31 (in millions): Pension Other Postretirement 2020 2019 2020 2019 Benefit obligation, beginning of year $ 2,878 $ 2,718 $ 673 $ 672 Service cost 17 16 7 8 Interest cost 93 111 21 27 Participant contributions — — 8 9 Actuarial loss 226 242 61 12 Amendment — (1) — — Settlement — (22) — — Acquisition 81 — 37 — Benefits paid (218) (186) (49) (55) Benefit obligation, end of year $ 3,077 $ 2,878 $ 758 $ 673 Accumulated benefit obligation, end of year $ 2,999 $ 2,867 The funded status of the plans and the amounts recognized on the Consolidated Balance Sheets as of December 31 are as follows (in millions): Pension Other Postretirement 2020 2019 2020 2019 Plan assets at fair value, end of year $ 2,824 $ 2,656 $ 744 $ 742 Benefit obligation, end of year 3,077 2,878 758 673 Funded status $ (253) $ (222) $ (14) $ 69 Amounts recognized on the Consolidated Balance Sheets: Other assets $ 43 $ 73 $ 20 $ 76 Other current liabilities (13) (13) — — Other long-term liabilities (283) (282) (34) (7) Amounts recognized $ (253) $ (222) $ (14) $ 69 The SERPs and restoration plan have no plan assets; however, the Company has Rabbi trusts that hold corporate-owned life insurance and other investments to provide funding for the future cash requirements of the SERPs and restoration plan. The cash surrender value of all of the policies included in the Rabbi trusts, net of amounts borrowed against the cash surrender value, plus the fair market value of other Rabbi trust investments, was $303 million and $252 million as of December 31, 2020 and 2019, respectively. These assets are not included in the plan assets in the above table, but are reflected in noncurrent investments and restricted cash and investments on the Consolidated Balance Sheets. The fair value of plan assets, projected benefit obligation and accumulated benefit obligation for (1) pension and other postretirement benefit plans with a projected benefit obligation in excess of the fair value of plan assets and (2) pension plans with an accumulated benefit obligation in excess of the fair value of plan assets as of December 31 are as follows (in millions): Pension Other Postretirement 2020 2019 2020 2019 Fair value of plan assets $ 1,782 $ 1,939 $ 417 $ 439 Projected benefit obligation $ 2,069 $ 2,227 $ 451 $ 446 Fair value of plan assets $ 1,064 $ 1,939 Accumulated benefit obligation $ 1,341 $ 2,222 Unrecognized Amounts The portion of the funded status of the plans not yet recognized in net periodic benefit cost as of December 31 is as follows (in millions): Pension Other Postretirement 2020 2019 2020 2019 Net loss (gain) $ 612 $ 653 $ 34 $ (23) Prior service credit (1) (2) (9) (14) Regulatory deferrals 2 1 3 6 Total $ 613 $ 652 $ 28 $ (31) A reconciliation of the amounts not yet recognized as components of net periodic benefit cost for the years ended December 31, 2020 and 2019 is as follows (in millions): Accumulated Other Regulatory Regulatory Comprehensive Asset Liability Loss Total Pension Balance, December 31, 2018 $ 730 $ — $ 16 $ 746 Net (gain) loss arising during the year (38) (33) 10 (61) Net prior service credit arising during the year — — (2) (2) Net amortization (31) — — (31) Total (69) (33) 8 (94) Balance, December 31, 2019 661 (33) 24 652 Net (gain) loss arising during the year (30) 13 10 (7) Net amortization (31) — (1) (32) Total (61) 13 9 (39) Balance, December 31, 2020 $ 600 $ (20) $ 33 $ 613 Accumulated Other Regulatory Regulatory Comprehensive Asset Liability Loss Total Other Postretirement Balance, December 31, 2018 $ 44 $ (10) $ 1 $ 35 Net gain arising during the year (45) (23) (4) (72) Net amortization 5 1 — 6 Total (40) (22) (4) (66) Balance, December 31, 2019 4 (32) (3) (31) Net loss arising during the year 36 12 7 55 Net amortization 7 (3) — 4 Total 43 9 7 59 Balance, December 31, 2020 $ 47 $ (23) $ 4 $ 28 Plan Assumptions Weighted-average assumptions used to determine benefit obligations and net periodic benefit cost were as follows: Pension Other Postretirement 2020 2019 2018 2020 2019 2018 Benefit obligations as of December 31: Discount rate 2.60 % 3.32 % 4.25 % 2.59 % 3.24 % 4.21 % Rate of compensation increase 2.75 % 2.75 % 2.75 % NA NA NA Interest crediting rates for cash balance plan 2018 NA NA 3.38 % NA NA NA 2019 NA 3.22 % 3.54 % NA NA NA 2020 2.44 % 2.94 % 3.54 % NA NA NA 2021 2.25 % 2.94 % 3.56 % NA NA NA 2022 2.25 % 3.02 % 3.56 % NA NA NA 2023 2.65 % 3.02 % 3.56 % NA NA NA Net periodic benefit cost for the years ended December 31: Discount rate 3.32 % 4.25 % 3.60 % 3.24 % 4.21 % 3.57 % Expected return on plan assets 5.94 % 6.48 % 6.36 % 5.42 % 6.39 % 6.44 % Rate of compensation increase 2.75 % 2.75 % 2.75 % NA NA NA Interest crediting rate for cash balance plan 2.44 % 3.22 % 3.38 % NA NA NA In establishing its assumption as to the expected return on plan assets, the Company utilizes the asset allocation and return assumptions for each asset class based on historical performance and forward-looking views of the financial markets. 2020 2019 Assumed healthcare cost trend rates as of December 31: Healthcare cost trend rate assumed for next year 6.30 % 6.50 % Rate that the cost trend rate gradually declines to 5.00 % 5.00 % Year that the rate reaches the rate it is assumed to remain at 2025 2025 Contributions and Benefit Payments Employer contributions to the pension and other postretirement benefit plans are expected to be $13 million and $14 million, respectively, during 2021. Funding to the established pension trusts is based upon the actuarially determined costs of the plans and the requirements of the IRC, the Employee Retirement Income Security Act of 1974 and the Pension Protection Act of 2006, as amended. The Company considers contributing additional amounts from time to time in order to achieve certain funding levels specified under the Pension Protection Act of 2006, as amended. The Company evaluates a variety of factors, including funded status, income tax laws and regulatory requirements, in determining contributions to its other postretirement benefit plans. The expected benefit payments to participants in the Company's pension and other postretirement benefit plans for 2021 through 2025 and for the five years thereafter are summarized below (in millions): Projected Benefit Payments Other Pension Postretirement 2021 $ 236 $ 53 2022 219 54 2023 220 54 2024 211 54 2025 206 52 2026-2030 926 238 Plan Assets Investment Policy and Asset Allocations The Company's investment policy for its pension and other postretirement benefit plans is to balance risk and return through a diversified portfolio of debt securities, equity securities and other alternative investments. Maturities for debt securities are managed to targets consistent with prudent risk tolerances. The plans retain outside investment advisors to manage plan investments within the parameters outlined by the Berkshire Hathaway Energy Company Investment Committee. The investment portfolio is managed in line with the investment policy with sufficient liquidity to meet near-term benefit payments. The target allocations (percentage of plan assets) for the Company's pension and other postretirement benefit plan assets are as follows as of December 31, 2020: Other Pension Postretirement % % PacifiCorp: Debt securities (1) 25-35 75-83 Equity securities (1) 53-68 16-24 Limited partnership interests 7-12 1-3 MidAmerican Energy: Debt securities (1) 50-80 60-70 Equity securities (1) 20-50 30-40 Real estate funds 0-5 — Other 0-5 0-5 NV Energy: Debt securities (1) 60-75 60-70 Equity securities (1) 25-40 30-40 (1) For purposes of target allocation percentages and consistent with the plans' investment policy, investment funds are allocated based on the underlying investments in debt and equity securities. Fair Value Measurements The following table presents the fair value of plan assets, by major category, for the Company's defined benefit pension plans (in millions): Input Levels for Fair Value Measurements (1) Level 1 Level 2 Total As of December 31, 2020: Cash equivalents $ — $ 79 $ 79 Debt securities: United States government obligations 52 — 52 Corporate obligations — 748 748 Municipal obligations — 69 69 Equity securities: United States companies 224 — 224 Total assets in the fair value hierarchy $ 276 $ 896 1,172 Investment funds (2) measured at net asset value 1,521 Limited partnership interests (3) measured at net asset value 88 Real estate funds measured at net asset value 43 Total assets measured at fair value $ 2,824 As of December 31, 2019: Cash equivalents $ 27 $ 36 $ 63 Debt securities: United States government obligations 210 — 210 International government obligations — 5 5 Corporate obligations — 376 376 Municipal obligations — 28 28 Agency, asset and mortgage-backed obligations — 115 115 Equity securities: United States companies 547 1 548 International companies 136 — 136 Investment funds (2) 125 — 125 Total assets in the fair value hierarchy $ 1,045 $ 561 1,606 Investment funds (2) measured at net asset value 915 Limited partnership interests (3) measured at net asset value 93 Real estate funds measured at net asset value 42 Total assets measured at fair value $ 2,656 (1) Refer to Note 15 for additional discussion regarding the three levels of the fair value hierarchy. (2) Investment funds are comprised of mutual funds and collective trust funds. These funds consist of equity and debt securities of approximately 69% and 31%, respectively, for 2020 and 62% and 38%, respectively, for 2019. Additionally, these funds are invested in United States and international securities of approximately 79% and 21%, respectively, for 2020 and 66% and 34%, respectively, for 2019. (3) Limited partnership interests include several funds that invest primarily in real estate, buyout, growth equity and venture capital. The following table presents the fair value of plan assets, by major category, for the Company's defined benefit other postretirement plans (in millions): Input Levels for Fair Value Measurements (1) Level 1 Level 2 Total As of December 31, 2020: Cash equivalents $ 20 $ 2 $ 22 Debt securities: United States government obligations 15 — 15 Corporate obligations — 102 102 Municipal obligations — 82 82 Agency, asset and mortgage-backed obligations — 47 47 Equity securities: United States companies 6 — 6 Investment funds (2) 299 — 299 Total assets in the fair value hierarchy $ 340 $ 233 573 Investment funds (2) measured at net asset value 167 Limited partnership interests (3) measured at net asset value 4 Total assets measured at fair value $ 744 As of December 31, 2019: Cash equivalents $ 17 $ 1 $ 18 Debt securities: United States government obligations 23 — 23 Corporate obligations — 44 44 Municipal obligations — 57 57 Agency, asset and mortgage-backed obligations — 33 33 Equity securities: United States companies 151 — 151 International companies 6 — 6 Investment funds (2) 236 — 236 Total assets in the fair value hierarchy $ 433 $ 135 568 Investment funds (2) measured at net asset value 169 Limited partnership interests (3) measured at net asset value 5 Total assets measured at fair value $ 742 (1) Refer to Note 15 for additional discussion regarding the three levels of the fair value hierarchy. (2) Investment funds are comprised of mutual funds and collective trust funds. These funds consist of equity and debt securities of approximately 40% and 60%, respectively, for 2020 and 58% and 42%, respectively, for 2019. Additionally, these funds are invested in United States and international securities of approximately 79% and 21%, respectively, for 2020 and 75% and 25%, respectively, for 2019. (3) Limited partnership interests include several funds that invest primarily in real estate, buyout, growth equity and venture capital. For level 1 investments, a readily observable quoted market price or net asset value of an identical security in an active market is used to record the fair value. For level 2 investments, the fair value is determined using pricing models based on observable market inputs. Shares of mutual funds not registered under the Securities Act of 1933, private equity limited partnership interests, common and commingled trust funds and investment entities are reported at fair value based on the net asset value per unit, which is used for expedience purposes. A fund's net asset value is based on the fair value of the underlying assets held by the fund less its liabilities. Foreign Operations Certain wholly-owned subsidiaries of Northern Powergrid participate in the Northern Powergrid group of the United Kingdom industry-wide Electricity Supply Pension Scheme (the "UK Plan"), which provides pension and other related defined benefits, based on final pensionable pay, to the employees of Northern Powergrid. The UK Plan is closed to employees hired after July 23, 1997. Employees hired after that date are covered by a defined contribution plan sponsored by a wholly-owned subsidiary of Northern Powergrid. Net Periodic Benefit Cost For purposes of calculating the expected return on pension plan assets, a market-related value is used. The market-related value of plan assets is calculated by including the difference between expected and actual investment returns after the first year in which they occur. Net periodic benefit cost for the UK Plan included the following components for the years ended December 31 (in millions): 2020 2019 2018 Service cost $ 16 $ 16 $ 19 Interest cost 40 49 56 Expected return on plan assets (101) (100) (101) Settlement 17 26 44 Net amortization 43 46 45 Net periodic benefit cost $ 15 $ 37 $ 63 Funded Status The following table is a reconciliation of the fair value of plan assets for the years ended December 31 (in millions): 2020 2019 Plan assets at fair value, beginning of year $ 2,151 $ 1,989 Employer contributions 56 56 Participant contributions 1 1 Actual return on plan assets 181 194 Settlement (63) (99) Benefits paid (67) (71) Foreign currency exchange rate changes 75 81 Plan assets at fair value, end of year $ 2,334 $ 2,151 The following table is a reconciliation of the benefit obligation for the years ended December 31 (in millions): 2020 2019 Benefit obligation, beginning of year $ 2,019 $ 1,833 Service cost 16 16 Interest cost 40 49 Participant contributions 1 1 Actuarial loss 188 175 Settlement (63) (99) Benefits paid (67) (71) Foreign currency exchange rate changes 71 115 Benefit obligation, end of year $ 2,205 $ 2,019 Accumulated benefit obligation, end of year $ 1,963 $ 1,786 The funded status of the UK Plan and the amounts recognized on the Consolidated Balance Sheets as of December 31 are as follows (in millions): 2020 2019 Plan assets at fair value, end of year $ 2,334 $ 2,151 Benefit obligation, end of year 2,205 2,019 Funded status $ 129 $ 132 Amounts recognized on the Consolidated Balance Sheets: Other assets $ 129 $ 132 Unrecognized Amounts The portion of the funded status of the UK Plan not yet recognized in net periodic benefit cost as of December 31 is as follows (in millions): 2020 2019 Net loss $ 612 $ 543 Prior service cost 6 6 Total $ 618 $ 549 A reconciliation of the amounts not yet recognized as components of net periodic benefit cost, which are included in accumulated other comprehensive loss on the Consolidated Balance Sheets, for the years ended December 31 is as follows (in millions): 2020 2019 Balance, beginning of year $ 549 $ 480 Net loss arising during the year 108 81 Settlement (17) (26) Net amortization (43) (46) Foreign currency exchange rate changes 21 60 Total 69 69 Balance, end of year $ 618 $ 549 Plan Assumptions Assumptions used to determine benefit obligations and net periodic benefit cost were as follows: 2020 2019 2018 Benefit obligations as of December 31: Discount rate 1.40 % 2.10 % 2.90 % Rate of compensation increase 3.05 % 3.30 % 3.55 % Rate of future price inflation 2.55 % 2.80 % 3.05 % Net periodic benefit cost for the years ended December 31: Discount rate 2.10 % 2.90 % 2.60 % Expected return on plan assets 5.00 % 5.10 % 4.90 % Rate of compensation increase 3.30 % 3.55 % 3.45 % Rate of future price inflation 2.80 % 3.05 % 2.95 % Contributions and Benefit Payments Employer contributions to the UK Plan are expected to be £50 million during 2021. The expected benefit payments to participants in the UK Plan for 2021 through 2025 and for the five years thereafter, excluding lump sum settlement elections and using the foreign currency exchange rate as of December 31, 2020, are summarized below (in millions): 2021 $ 74 2022 75 2023 77 2024 79 2025 81 2026-2030 431 Plan Assets Investment Policy and Asset Allocations The investment policy for the UK Plan is to balance risk and return through a diversified portfolio of debt securities, equity securities, real estate and other asset classes. Maturities for debt securities are managed to targets consistent with prudent risk tolerances. The UK Plan retains outside investment advisors to manage plan investments within the parameters set by the trustees of the UK Plan in consultation with Northern Powergrid. The investment portfolio is managed in line with the investment policy with sufficient liquidity to meet near-term benefit payments. The return on assets assumption is based on a weighted-average of the expected historical performance for the types of assets in which the UK Plan invests. The target allocations (percentage of plan assets) for the UK Plan assets are as follows as of December 31, 2020: % Debt securities (1) 60-70 Equity securities (1) 10-20 Real estate funds and other 15-25 (1) For purposes of target allocation percentages and consistent with the plans' investment policy, investment funds have been allocated based on the underlying investments in debt and equity securities. Fair Value Measurements The following table presents the fair value of the UK Plan assets, by major category (in millions): Input Levels for Fair Value Measurements (1) Level 1 Level 2 Level 3 Total As of December 31, 2020: Cash equivalents $ 5 $ 49 $ — $ 54 Debt securities: United Kingdom government obligations 1,102 — — 1,102 Equity securities: Investment funds (2) — 833 — 833 Real estate funds — — 237 237 Total $ 1,107 $ 882 $ 237 2,226 Investment funds (2) measured at net asset value 108 Total assets measured at fair value $ 2,334 As of December 31, 2019: Cash equivalents $ 3 $ 24 $ — $ 27 Debt securities: United Kingdom government obligations 960 — — 960 Equity securities: Investment funds (2) — 818 — 818 Real estate funds — — 243 243 Total $ 963 $ 842 $ 243 2,048 Investment funds (2) measured at net asset value 103 Total assets measured at fair value $ 2,151 (1) Refer to Note 15 for additional discussion regarding the three levels of the fair value hierarchy. (2) Investment funds are comprised of mutual funds and collective trust funds. These funds consist of equity and debt securities of approximately 40% and 60%, respectively, for 2020 and 38% and 62%, respectively, for 2019. The fair value of the UK Plan's assets are determined similar to the plan assets of the domestic plans as previously discussed. The following table reconciles the beginning and ending balances of the UK Plan assets measured at fair value using significant Level 3 inputs for the years ended December 31 (in millions): Real Estate Funds 2020 2019 2018 Beginning balance $ 243 $ 239 $ 230 Actual return on plan assets still held at period end (13) (5) 23 Foreign currency exchange rate changes 7 9 (14) Ending balance $ 237 $ 243 $ 239 Defined Contribution Plans The Company sponsors various defined contribution plans covering substantially all employees. The Company's contributions vary depending on the plan, but matching contributions are based on each participant's level of contribution, and certain participants receive contributions based on eligible pre-tax annual compensation. Contributions cannot exceed the maximum allowable for tax purposes. The Company's contributions to these plans were $127 million, $115 million and $112 million for the years ended December 31, 2020, 2019 and 2018, respectively.
MidAmerican Energy Company [Member]
Defined Benefit Plan Disclosure [Line Items]
Employee Benefit Plans [Text Block]	Defined Benefit Plan MidAmerican Energy sponsors a noncontributory defined benefit pension plan covering a majority of all employees of BHE and its domestic energy subsidiaries other than PacifiCorp and NV Energy, Inc. Benefit obligations under the plan are based on a cash balance arrangement for salaried employees and most union employees and final average pay formulas for other union employees. MidAmerican Energy also maintains noncontributory, nonqualified defined benefit supplemental executive retirement plans ("SERP") for certain active and retired participants. In 2018, the defined benefit pension plan recorded a settlement gain of $1 million for previously unrecognized gains as a result of excess lump sum distributions over the defined threshold for the year ended December 31, 2018. MidAmerican Energy also sponsors certain postretirement healthcare and life insurance benefits covering substantially all retired employees of BHE and its domestic energy subsidiaries other than PacifiCorp and NV Energy, Inc. Under the plans, a majority of all employees of the participating companies may become eligible for these benefits if they reach retirement age. New employees are not eligible for benefits under the plans. MidAmerican Energy has been allowed to recover accrued pension and other postretirement benefit costs in its electric and gas service rates. On November 1, 2020, BHE completed its acquisition of substantially all of the natural gas transmission and storage business of Dominion Energy, Inc. and Dominion Energy Questar Corporation, exclusive of Dominion Energy Questar Pipeline, LLC and related entities (the "GT&S Transaction"). Defined benefit pension and postretirement benefits provided to the employees of GT&S are administered in the respective plans sponsored by MidAmerican Energy. Initial pension and postretirement plan liabilities of $81 million and $37 million, respectively, resulted from the GT&S Transaction and are included in plan obligations and affiliate receivables on MidAmerican Energy's Balance Sheet. Net Periodic Benefit Cost For purposes of calculating the expected return on pension plan assets, a market-related value is used. The market-related value of plan assets is calculated by spreading the difference between expected and actual investment returns on equity investments over a five-year period beginning after the first year in which they occur. MidAmerican Energy bills to and is reimbursed currently for affiliates' share of the net periodic benefit costs from all plans in which such affiliates participate. In 2020, 2019 and 2018, MidAmerican Energy's share of the pension net periodic benefit (credit) cost was $(13) million, $(8) million and $(9) million, respectively. MidAmerican Energy's share of the other postretirement net periodic benefit (credit) cost in 2020, 2019 and 2018 totaled $(5) million, $1 million and $(2) million, respectively. Net periodic benefit cost for the plans of MidAmerican Energy and the aforementioned affiliates included the following components for the years ended December 31 (in millions): Pension Other Postretirement 2020 2019 2018 2020 2019 2018 Service cost $ 8 $ 6 $ 9 $ 4 $ 5 $ 5 Interest cost 25 30 28 7 10 8 Expected return on plan assets (40) (41) (44) (14) (13) (13) Settlement — — (1) — — — Net amortization 1 1 2 (5) (3) (4) Net periodic benefit (credit) cost $ (6) $ (4) $ (6) $ (8) $ (1) $ (4) Funded Status The following table is a reconciliation of the fair value of plan assets for the years ended December 31 (in millions): Pension Other Postretirement 2020 2019 2020 2019 Plan assets at fair value, beginning of year $ 717 $ 644 $ 272 $ 247 Employer contributions 6 7 3 1 Participant contributions — — 1 2 Actual return on plan assets 55 123 15 42 Benefits paid (60) (57) (13) (20) Plan assets at fair value, end of year $ 718 $ 717 $ 278 $ 272 The following table is a reconciliation of the benefit obligations for the years ended December 31 (in millions): Pension Other Postretirement 2020 2019 2020 2019 Benefit obligation, beginning of year $ 763 $ 736 $ 226 $ 242 Service cost 8 6 4 5 Interest cost 25 30 7 10 Participant contributions — — 1 2 Actuarial (gain) loss 28 48 42 (13) Acquisition 81 — 37 — Benefits paid (60) (57) (13) (20) Benefit obligation, end of year $ 845 $ 763 $ 304 $ 226 Accumulated benefit obligation, end of year $ 773 $ 758 The funded status of the plans and the amounts recognized on the Balance Sheets as of December 31 are as follows (in millions): Pension Other Postretirement 2020 2019 2020 2019 Plan assets at fair value, end of year $ 718 $ 717 $ 278 $ 272 Less - Benefit obligation, end of year 845 763 304 226 Funded status $ (127) $ (46) $ (26) $ 46 Amounts recognized on the Balance Sheets: Other assets $ — $ 66 $ — $ 46 Other current liabilities (7) (7) — — Other liabilities (120) (105) (26) — Amounts recognized $ (127) $ (46) $ (26) $ 46 The SERP has no plan assets; however, MidAmerican Energy and BHE have Rabbi trusts that hold corporate-owned life insurance and other investments to provide funding for the future cash requirements of the SERP. The cash surrender value of all of the policies included in MidAmerican Energy's Rabbi trusts, net of amounts borrowed against the cash surrender value, plus the fair market value of other Rabbi trust investments, was $130 million and $122 million as of December 31, 2020 and 2019. These assets are not included in the plan assets in the above table, but are reflected in investments and restricted investments on the Balance Sheets. The accumulated benefit obligation and projected benefit obligation for the SERP was $117 million and $117 million for 2020 and $112 million and $112 million for 2019, respectively. Unrecognized Amounts The portion of the funded status of the plans not yet recognized in net periodic benefit cost as of December 31 is as follows (in millions): Pension Other Postretirement 2020 2019 2020 2019 Net loss (gain) $ 18 $ 6 $ 45 $ 4 Prior service cost (credit) — (1) (9) (14) Total $ 18 $ 5 $ 36 $ (10) MidAmerican Energy sponsors pension and other postretirement benefit plans on behalf of certain of its affiliates in addition to itself, and therefore, the portion of the funded status of the respective plans that has not yet been recognized in net periodic benefit cost is attributable to multiple entities. Additionally, substantially all of MidAmerican Energy's portion of such amounts is either refundable to or recoverable from its customers and is reflected as regulatory liabilities and regulatory assets. A reconciliation of the amounts not yet recognized as components of net periodic benefit cost for the years ended December 31, 2020 and 2019 is as follows (in millions): Regulatory Asset Regulatory Liability Receivables (Payables) with Affiliates Total Pension Balance, December 31, 2018 $ 25 $ — $ 16 $ 41 Net (gain) loss arising during the year (5) (32) 2 (35) Net amortization (1) — — (1) Total (6) (32) 2 (36) Balance, December 31, 2019 19 (32) 18 5 Net loss (gain) arising during the year 3 12 (1) 14 Net amortization (1) — — (1) Total 2 12 (1) 13 Balance, December 31, 2020 $ 21 $ (20) $ 17 $ 18 Regulatory Receivables (Payables) with Affiliates Total Other Postretirement Balance, December 31, 2018 $ 37 $ (9) $ 28 Net gain arising during the year (33) (9) (42) Net amortization 3 1 4 Total (30) (8) (38) Balance, December 31, 2019 7 (17) (10) Net loss arising during the year 34 7 41 Net amortization 4 1 5 Total 38 8 46 Balance, December 31, 2020 $ 45 $ (9) $ 36 Plan Assumptions Assumptions used to determine benefit obligations and net periodic benefit cost were as follows: Pension Other Postretirement 2020 2019 2018 2020 2019 2018 Benefit obligations as of December 31: Discount rate 2.75 % 3.40 % 4.25 % 2.65 % 3.20 % 4.15 % Rate of compensation increase 2.75 % 2.75 % 2.75 % N/A N/A N/A Interest crediting rates for cash balance plan 2018 N/A N/A 2.26 % N/A N/A N/A 2019 N/A 3.40 % 3.40 % N/A N/A N/A 2020 2.27 % 2.27 % 3.40 % N/A N/A N/A 2021 0.99 % 2.27 % 3.40 % N/A N/A N/A 2022 0.99 % 2.27 % 3.40 % N/A N/A N/A 2023 and beyond 0.99 % 2.27 % 3.40 % N/A N/A N/A Net periodic benefit cost for the years ended December 31: Discount rate 3.40 % 4.25 % 3.60 % 3.20 % 4.15 % 3.50 % Expected return on plan assets (1) 6.25 % 6.50 % 6.50 % 6.00 % 6.25 % 6.25 % Rate of compensation increase 2.75 % 2.75 % 2.75 % N/A N/A N/A Interest crediting rates for cash balance plan 2.27 % 3.40 % 2.26 % N/A N/A N/A (1) Amounts reflected are pretax values. Assumed after-tax returns for a taxable, non-union other postretirement plan were 4.62% for 2020, 4.62% for 2019, and 4.13% for 2018. In establishing its assumption as to the expected return on plan assets, MidAmerican Energy utilizes the asset allocation and return assumptions for each asset class based on historical performance and forward-looking views of the financial markets. 2020 2019 Assumed healthcare cost trend rates as of December 31: Healthcare cost trend rate assumed for next year 6.20 % 6.50 % Rate that the cost trend rate gradually declines to 5.00 % 5.00 % Year that the rate reaches the rate it is assumed to remain at 2025 2025 Contributions and Benefit Payments Employer contributions to the pension and other postretirement benefit plans are expected to be $7 million and $12 million, respectively, during 2021. Funding to MidAmerican Energy's qualified pension benefit plan trust is based upon the actuarially determined costs of the plan and the requirements of the Internal Revenue Code, the Employee Retirement Income Security Act of 1974 and the Pension Protection Act of 2006, as amended. MidAmerican Energy considers contributing additional amounts from time to time in order to achieve certain funding levels specified under the Pension Protection Act of 2006, as amended. MidAmerican Energy evaluates a variety of factors, including funded status, income tax laws and regulatory requirements, in determining contributions to its other postretirement benefit plans. Net periodic benefit costs assigned to MidAmerican Energy affiliates are reimbursed currently in accordance with its intercompany administrative services agreement. The expected benefit payments to participants in MidAmerican Energy's pension and other postretirement benefit plans for 2021 through 2025 and for the five years thereafter are summarized below (in millions): Projected Benefit Payments Pension Other Postretirement 2021 $ 64 $ 20 2022 62 21 2023 60 22 2024 58 23 2025 56 22 2026-2030 248 104 Plan Assets Investment Policy and Asset Allocations MidAmerican Energy's investment policy for its pension and other postretirement benefit plans is to balance risk and return through a diversified portfolio of debt securities, equity securities and other alternative investments. Maturities for debt securities are managed to targets consistent with prudent risk tolerances. The plans retain outside investment advisors to manage plan investments within the parameters outlined by the Berkshire Hathaway Energy Company Investment Committee. The investment portfolio is managed in line with the investment policy with sufficient liquidity to meet near-term benefit payments. The target allocations (percentage of plan assets) for MidAmerican Energy's pension and other postretirement benefit plan assets are as follows as of December 31, 2020: Pension Other Postretirement % % Debt securities (1) 50-80 60-70 Equity securities (1) 20-50 30-40 Real estate funds 0-5 — Other 0-5 0-5 (1) For purposes of target allocation percentages and consistent with the plans' investment policy, investment funds are allocated based on the underlying investments in debt and equity securities. Fair Value Measurements The following table presents the fair value of plan assets, by major category, for MidAmerican Energy's defined benefit pension plan (in millions): Input Levels for Fair Value Measurements (1) Level 1 Level 2 Level 3 Total As of December 31, 2020: Cash equivalents $ — $ 26 $ — $ 26 Debt securities: United States government obligations 14 — — 14 Corporate obligations — 160 — 160 Municipal obligations — 17 — 17 Equity securities: United States companies 65 — — 65 Total assets in the hierarchy $ 79 $ 203 $ — 282 Investment funds (2) measured at net asset value 393 Real estate funds measured at net asset value 43 Total assets measured at fair value $ 718 As of December 31, 2019: Cash equivalents $ 21 $ — $ — $ 21 Debt securities: United States government obligations 16 — — 16 Corporate obligations — 61 — 61 Municipal obligations — 5 — 5 Agency, asset and mortgage-backed obligations — 33 — 33 Equity securities: United States companies 129 — — 129 International companies 42 — — 42 Investment funds (2) 69 — — 69 Total assets in the hierarchy $ 277 $ 99 $ — 376 Investment funds (2) measured at net asset value 299 Real estate funds measured at net asset value 42 Total assets measured at fair value $ 717 (1) Refer to Note 12 for additional discussion regarding the three levels of the fair value hierarchy. (2) Investment funds are comprised of mutual funds and collective trust funds. These funds consist of equity and debt securities of approximately 65% and 35%, respectively, for 2020 and 69% and 31%, respectively, for 2019. Additionally, these funds are invested in United States and international securities of approximately 82% and 18%, respectively, for 2020 and 74% and 26%, respectively, for 2019. The following table presents the fair value of plan assets, by major category, for MidAmerican Energy's defined benefit other postretirement plans (in millions): Input Levels for Fair Value Measurements (1) Level 1 Level 2 Level 3 Total As of December 31, 2020: Cash equivalents $ 11 $ — $ — $ 11 Debt securities: United States government obligations 3 — — 3 Corporate obligations — 7 — 7 Municipal obligations — 65 — 65 Agency, asset and mortgage-backed obligations — 3 — 3 Equity securities: Investment funds (2) 189 — — 189 Total assets measured at fair value $ 203 $ 75 $ — $ 278 As of December 31, 2019: Cash equivalents $ 6 $ — $ — $ 6 Debt securities: United States government obligations 6 — — 6 Corporate obligations — 12 — 12 Municipal obligations — 55 — 55 Agency, asset and mortgage-backed obligations — 10 — 10 Equity securities: United States companies 75 — — 75 Investment funds (2) 108 — — 108 Total assets measured at fair value $ 195 $ 77 $ — $ 272 (1) Refer to Note 12 for additional discussion regarding the three levels of the fair value hierarchy. (2) Investment funds are comprised of mutual funds and collective trust funds. These funds consist of equity and debt securities of approximately 56% and 44%, respectively, for 2020 and 77% and 23%, respectively, for 2019. Additionally, these funds are invested in United States and international securities of approximately 56% and 44%, respectively, for 2020 and 42% and 58%, respectively, for 2019. For level 1 investments, a readily observable quoted market price or net asset value of an identical security in an active market is used to record the fair value. For level 2 investments, the fair value is determined using pricing models based on observable market inputs. Shares of mutual funds not registered under the Securities Act of 1933, private equity limited partnership interests, common and commingled trust funds and investment entities are reported at fair value based on the net asset value per unit, which is used for expedience purposes. A fund's net asset value is based on the fair value of the underlying assets held by the fund less its liabilities. Defined Contribution Plan
MidAmerican Funding, LLC and Subsidiaries [Member]
Defined Benefit Plan Disclosure [Line Items]
Employee Benefit Plans [Text Block]	Refer to Note 10 of MidAmerican Energy's Notes to Financial Statements for additional information regarding MidAmerican Funding's pension, supplemental retirement and postretirement benefit plans. Pension and postretirement costs allocated by MidAmerican Funding to its parent and other affiliates in each of the years ended December 31, were as follows (in millions): 2020 2019 2018 Pension costs $ 7 $ 4 $ 3 Other postretirement costs (3) (2) (2)
Eastern Energy Gas Holdings, LLC [Member]
Defined Benefit Plan Disclosure [Line Items]
Employee Benefit Plans [Text Block]	Employee Benefit Plans Defined Benefit Plans As discussed in Note 3, in November 2020, the GT&S Transaction was completed and the assets and obligations of the pension and other postretirement employee benefit plans associated with the operations sold and relating to services provided before closing were retained by DEI. As a result, just prior to completing the sale, net benefit plan assets of $895 million were distributed through an equity transaction with DEI. Eastern Energy Gas employees are covered by MidAmerican Energy Company's ("MidAmerican Energy") pension and other postretirement benefit plans subsequent to the GT&S Transaction. Prior to the GT&S Transaction, Eastern Energy Gas participated in a number of the DEI-sponsored retirement plans. Prior to the GT&S Transaction, certain Eastern Energy Gas employees not represented by collective bargaining units were covered by the Dominion Energy Pension Plan, a defined benefit pension plan sponsored by DEI that provides benefits to multiple DEI subsidiaries. As participating employers, Eastern Energy Gas was subject to DEI's funding policy, which was to contribute annually an amount that is in accordance with the Employee Retirement Income Security Act of 1974. During 2020, Eastern Energy Gas made no contributions to the Dominion Energy Pension Plan. Eastern Energy Gas' net periodic pension credit related to this plan was $(14) million, $(8) million and $(35) million for the years ended December 31, 2020, 2019 and 2018, respectively. Net periodic pension (credit) cost is reflected in other operations and maintenance expense in the Consolidated Statements of Operations, except for $(14) million and $(21) million of Eastern Energy Gas' costs for the years ended December 31, 2019 and 2018, respectively, that are recorded in net income from discontinued operations. The funded status of various DEI subsidiary groups and employee compensation are the basis for determining the share of total pension costs for participating DEI subsidiaries. Subsequent to the GT&S Transaction, certain Eastern Energy Gas employees are covered by the MidAmerican Energy Pension Plan similar to the DEI plan described above. Eastern Energy Gas' net periodic pension cost related to this plan was $3 million for the year ended December 31, 2020. During 2020, Eastern Energy Gas made $3 million of contributions to the MidAmerican Energy Pension Plan and expects to contribute $19 million in 2021. Prior to the GT&S transaction, certain retiree healthcare and life insurance benefits for Eastern Energy Gas employees not represented by collective bargaining units were covered by the Dominion Energy Retiree Health and Welfare Plan, a plan sponsored by DEI that provides certain retiree healthcare and life insurance benefits to multiple DEI subsidiaries. Eastern Energy Gas' net periodic benefit credit related to this plan was $(5) million, $(4) million, and $(8) million for the years ended December 31, 2020, 2019 and 2018, respectively. Net periodic benefit (credit) cost is reflected in other operations and maintenance expense in the Consolidated Statements of Operations, except for less than $(1) million and $(2) million of Eastern Energy Gas' costs for the years ended December 31, 2019 and 2018, respectively, that are recorded in net income from discontinued operations. Employee headcount is the basis for determining the share of total other postretirement benefit costs for participating DEI subsidiaries. Subsequent to the GT&S Transaction, certain Eastern Energy Gas employees are covered by the MidAmerican Energy Retiree Health and Welfare plan similar to the DEI plan described above. Eastern Energy Gas' net periodic benefit cost related to this plan was $2 million for the year ended December 31, 2020. During 2020, Eastern Energy Gas made $2 million of contributions to the MidAmerican Energy Health and Welfare Plan and expects to contribute $12 million in 2021. Pension benefits for Eastern Energy Gas employees represented by collective bargaining units were covered by a separate pension plan that provides benefits to employees of both EGTS and Hope Gas, Inc. ("Hope"). Employee compensation was the basis for allocating pension costs and obligations between EGTS and Hope. Retiree healthcare and life insurance benefits for Eastern Energy Gas employees represented by collective bargaining units were covered by a separate other postretirement benefit plan that provides benefits to both EGTS and Hope. Employee headcount was the basis for allocating other postretirement benefit costs and obligations between EGTS and Hope. Eastern Energy Gas included the separate pension and other postretirement benefit plans for East Ohio employees covered by collective bargaining units through November 2019, the effective date of the Dominion Energy Gas Restructuring. See Note 3 for more information on the Dominion Energy Gas Restructuring. Pension Remeasurement In the third quarter of 2020, Eastern Energy Gas remeasured a pension plan due to a curtailment resulting from the agreement for DEI to retain the assets and obligations of the pension benefit plan associated with the GT&S Transaction. The remeasurement resulted in an increase in the pension benefit obligation of $3 million and a decrease in the fair value of the pension plan assets of $7 million for Eastern Energy Gas. The impact of the remeasurement on net periodic pension benefit credit was recognized prospectively from the remeasurement date and is not material. The discount rate used for the remeasurement was 3.16%. All other assumptions used for the remeasurement were consistent with the measurement as of December 31, 2019. Voluntary Retirement Program In March 2019, Eastern Energy Gas announced a voluntary retirement program to employees that met certain age and service requirements. The voluntary retirement program will not compromise safety or Eastern Energy Gas' ability to comply with applicable laws and regulations. In 2019, upon the determinations made concerning the number of employees that elected to participate in the program, Eastern Energy Gas recorded a charge of $74 million ($58 million after-tax) included within operations and maintenance expense ($41 million), other income ($1 million) and discontinued operations ($32 million) in the Consolidated Statements of Operations. In the second quarter of 2019, Eastern Energy Gas remeasured its pension and other postretirement benefit plans as a result of the voluntary retirement program. The remeasurement resulted in an increase in the pension benefit obligation of $32 million and an increase in the fair value of the pension plan assets of $146 million. In addition, the remeasurement resulted in an increase in the accumulated postretirement benefit obligation of $8 million and an increase in the fair value of the other postretirement benefit plan assets of $29 million. The impact of the remeasurement on net periodic benefit cost (credit) was recognized prospectively from the remeasurement date. The discount rate used for the remeasurement was 4.10% for the Eastern Energy Gas pension plans and 4.05% for the Eastern Energy Gas other postretirement benefit plans. All other assumptions used for the remeasurement were consistent with the measurement as of December 31, 2018. Funded Status The following table is a reconciliation of the fair value of plan assets for the year ended December 31 (in millions): Pension Other Postretirement 2019 2019 Plan assets at fair value, beginning of year $ 1,656 $ 311 Dominion Energy Gas Restructuring (1,084) (126) Employer contributions — 12 Actual return on plan assets 129 38 Benefits paid (15) (8) Plan assets at fair value, end of year $ 686 $ 227 The following table is a reconciliation of the benefit obligations for the year ended December 31 (in millions): Pension Other Postretirement 2019 2019 Benefit obligation, beginning of year $ 730 $ 256 Dominion Energy Gas Restructuring (468) (135) Service cost 6 1 Interest cost 11 5 Actuarial loss 30 1 Settlement 1 1 Benefits paid (15) (8) Benefit obligation, end of year $ 295 $ 121 The funded status of the plans and the amounts recognized on the Consolidated Balance Sheets as of December 31 are as follows (in millions): Pension Other Postretirement 2019 2019 Plan assets at fair value, end of year $ 686 $ 227 Less - Benefit obligation, end of year 295 121 Funded status $ 391 $ 106 Amounts recognized on the Consolidated Balance Sheets: Other assets $ 391 $ 106 Amounts recognized $ 391 $ 106 Significant assumptions used to determine benefit obligations: Discount rate 3.63 % 3.44 % Weighted average rate of increase for compensation 4.64 % n/a The accumulated benefit obligation for the defined benefit pension plans covering Eastern Energy Gas employees represented by collective bargaining units was $279 million as of December 31, 2019. Plan Assets Investment Policy and Asset Allocations DEI's overall objective for investing its pension and other postretirement plan assets is to achieve appropriate long-term rates of return commensurate with prudent levels of risk. As a participating employer in various pension plans sponsored by DEI, Eastern Energy Gas was subject to DEI's investment policies for such plans. To minimize risk, funds are broadly diversified among asset classes, investment strategies and investment advisors. The strategic target asset allocations for DEI's pension funds were 28% U.S. equity, 18% non-U.S. equity, 35% fixed income, 3% real estate and 16% other alternative investments. U.S. equity includes investments in large-cap, mid-cap and small-cap companies located in the U.S. Non-U.S. equity includes investments in large-cap and small-cap companies located outside of the U.S. including both developed and emerging markets. Fixed income includes corporate debt instruments of companies from diversified industries and U.S. Treasuries. The U.S. equity, non-U.S. equity and fixed income investments are in individual securities as well as mutual funds. Real estate includes equity real estate investment trusts and investments in partnerships. Other alternative investments include partnership investments in private equity, debt and hedge funds that follow several different strategies. DEI also utilizes common/collective trust funds as an investment vehicle for its defined benefit plans. A common/collective trust fund is a pooled fund operated by a bank or trust company for investment of the assets of various organizations and individuals in a well-diversified portfolio. Common/collective trust funds are funds of grouped assets that follow various investment strategies. Strategic investment policies are established for DEI's prefunded benefit plans based upon periodic asset/liability studies. Factors considered in setting the investment policy include employee demographics, liability growth rates, future discount rates, the funded status of the plans and the expected long-term rate of return on plan assets. Deviations from the plans' strategic allocation are a function of DEI's assessments regarding short-term risk and reward opportunities in the capital markets and/or short-term market movements which result in the plans' actual asset allocations varying from the strategic target asset allocations. Through periodic rebalancing, actual allocations are brought back in line with the target. Future asset/liability studies will focus on strategies to further reduce pension and other postretirement plan risk, while still achieving attractive levels of returns. Financial derivatives may be used to obtain or manage market exposures and to hedge assets and liabilities. Fair Value Measurements The following table presents the fair value of plan assets, by major category, for Eastern Energy Gas' defined benefit pension plan as of December 31, 2019 (in millions): Input Levels for Fair Value Measurements Level 1 (1) Level 2 (1) Level 3 (1) Total Cash and cash equivalents $ 1 $ — $ — $ 1 Debt securities: United States government obligations 2 59 — 61 Corporate obligations 3 66 — 69 Insurance contracts — 28 — 28 Equity securities: United States equity securities 177 — — 177 International equity securities 114 — — 114 Total assets in the fair value hierarchy $ 297 $ 153 $ — 450 Investment funds measured at net asset value 238 Investments at fair value $ 688 (1) Refer to Note 15 for additional discussion regarding the three levels of the fair value hierarchy. The following table presents the fair value of plan assets, by major category, for Eastern Energy Gas' defined benefit other postretirement plan as of December 31, 2019 (in millions): Input Levels for Fair Value Measurements Level 1 (1) Level 2 (1) Level 3 (1) Total Equity securities: United States equity securities $ 86 $ — $ — $ 86 International equity securities 21 — — 21 Total assets in the fair value hierarchy $ 107 $ — $ — 107 Investment funds measured at net asset value 120 Investments at fair value $ 227 (1) Refer to Note 15 for additional discussion regarding the three levels of the fair value hierarchy. For Level 1 investments, a readily observable quoted market price or net asset value of an identical security in an active market is used to record the fair value. For Level 2 investments, the fair value is determined using pricing models based on observable market inputs. Shares of mutual funds not registered under the Securities Act of 1933, private equity limited partnership interests, common and commingled trust funds and investment entities are reported at fair value based on the net asset value per unit, which is used for expedience purposes. A fund's net asset value is based on the fair value of the underlying assets held by the fund less its liabilities. Net Periodic Benefit Cost Net periodic benefit cost for the plans included the following components for the years ended December 31 (in millions): Pension Other Postretirement 2020 2019 2018 2020 2019 2018 Service cost $ 5 $ 6 $ 18 $ 1 $ 1 $ 4 Interest cost 8 11 29 4 5 11 Expected return on plan assets (47) (54) (150) (16) (16) (28) Settlement — 1 — — 1 — Net amortization 5 7 19 (3) (2) (1) Net periodic benefit cost (credit) $ (29) $ (29) $ (84) $ (14) $ (11) $ (14) Significant assumptions used to determine periodic credits for the years ended December 31: Pension Other Postretirement 2020 2019 2018 2020 2019 2018 Discount rate 3.16% - 3.63% 4.10% - 4.42% 3.81 % 3.44 % 4.05% - 4.37% 3.81 % Expected long-term rate of return on plan assets 8.60 % 8.65 % 8.75 % 8.50 % 8.50 % 8.50 % Weighted average rate of increase for compensation 4.73 % 4.55 % 4.11 % n/a n/a n/a Healthcare cost trend rate 6.50 % 6.50 % 7.00 % Rate to which the cost trend rate is assumed to decline (the ultimate trend rate) 5.00 % 5.00 % 5.00 % Year that the rate reached the ultimate trend rate 2026 2025 2022 Unrecognized Amounts The portion of the funded status of the plans not yet recognized in net periodic benefit cost as of December 31 is as follows (in millions): Pension Other Postretirement 2019 2019 Net loss $ 150 $ 44 Prior service cost (credit) — (49) Total (1) $ 150 $ (5) (1) As of December 31, 2019, of the $150 million related to pension benefits, $147 million is included in AOCI, with the remainder included in regulatory assets and liabilities and the $(5) million related to other postretirement benefits is included entirely in regulatory assets and liabilities. Defined Contribution Plans Eastern Energy Gas participated in the BHE GT&S, LLC ("BHE GT&S") defined contribution employee savings plan subsequent to the GT&S Transaction and the DEI defined contribution employee savings plans prior to the GT&S Transaction. Eastern Energy Gas' matching contributions are based on each participant's level of contribution. Contributions cannot exceed the maximum allowable for tax purposes. Eastern Energy Gas' contributions to the 401(k) plan were $4 million, $4 million and $8 million for the years ended December 31, 2020, 2019 and 2018, respectively.

Retirement Plan and Postretirem

Retirement Plan and Postretirement Benefits (Notes)	12 Months Ended
	Dec. 31, 2020
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Employee Benefit Plans [Text Block]	Employee Benefit Plans Defined Benefit Plans Domestic Operations PacifiCorp, MidAmerican Energy and NV Energy sponsor defined benefit pension plans that cover a majority of all employees of BHE and its domestic energy subsidiaries. These pension plans include noncontributory defined benefit pension plans, supplemental executive retirement plans ("SERP") and restoration plans. PacifiCorp, MidAmerican Energy and NV Energy also provide certain postretirement healthcare and life insurance benefits through various plans to eligible retirees. On November 1, 2020, BHE completed its acquisition of substantially all of the natural gas transmission and storage business of DEI and Dominion Questar, exclusive of the Questar Pipeline Group (the "GT&S Transaction"). Defined benefit pension and postretirement benefits provided to the employees of BHE GT&S, which were part of the GT&S Transaction completed on November 1, 2020, are administered in the respective plans sponsored by MidAmerican Energy. Initial pension and postretirement plan liabilities of $81 million and $37 million, respectively, resulted from the GT&S Transaction. Net Periodic Benefit Cost For purposes of calculating the expected return on plan assets, a market-related value is used. The market-related value of plan assets is generally calculated by spreading the difference between expected and actual investment returns over a five-year period beginning after the first year in which they occur. Net periodic benefit cost for the plans included the following components for the years ended December 31 (in millions): Pension Other Postretirement 2020 2019 2018 2020 2019 2018 Service cost $ 17 $ 16 $ 21 $ 7 $ 8 $ 9 Interest cost 93 111 105 21 27 24 Expected return on plan assets (140) (154) (164) (34) (40) (41) Settlement — — 21 — — — Net amortization 32 31 28 (4) (6) (13) Net periodic benefit cost (credit) $ 2 $ 4 $ 11 $ (10) $ (11) $ (21) Funded Status The following table is a reconciliation of the fair value of plan assets for the years ended December 31 (in millions): Pension Other Postretirement 2020 2019 2020 2019 Plan assets at fair value, beginning of year $ 2,656 $ 2,396 $ 742 $ 664 Employer contributions 13 12 3 2 Participant contributions — — 8 9 Actual return on plan assets 373 456 40 122 Settlement — (22) — — Benefits paid (218) (186) (49) (55) Plan assets at fair value, end of year $ 2,824 $ 2,656 $ 744 $ 742 The following table is a reconciliation of the benefit obligations for the years ended December 31 (in millions): Pension Other Postretirement 2020 2019 2020 2019 Benefit obligation, beginning of year $ 2,878 $ 2,718 $ 673 $ 672 Service cost 17 16 7 8 Interest cost 93 111 21 27 Participant contributions — — 8 9 Actuarial loss 226 242 61 12 Amendment — (1) — — Settlement — (22) — — Acquisition 81 — 37 — Benefits paid (218) (186) (49) (55) Benefit obligation, end of year $ 3,077 $ 2,878 $ 758 $ 673 Accumulated benefit obligation, end of year $ 2,999 $ 2,867 The funded status of the plans and the amounts recognized on the Consolidated Balance Sheets as of December 31 are as follows (in millions): Pension Other Postretirement 2020 2019 2020 2019 Plan assets at fair value, end of year $ 2,824 $ 2,656 $ 744 $ 742 Benefit obligation, end of year 3,077 2,878 758 673 Funded status $ (253) $ (222) $ (14) $ 69 Amounts recognized on the Consolidated Balance Sheets: Other assets $ 43 $ 73 $ 20 $ 76 Other current liabilities (13) (13) — — Other long-term liabilities (283) (282) (34) (7) Amounts recognized $ (253) $ (222) $ (14) $ 69 The SERPs and restoration plan have no plan assets; however, the Company has Rabbi trusts that hold corporate-owned life insurance and other investments to provide funding for the future cash requirements of the SERPs and restoration plan. The cash surrender value of all of the policies included in the Rabbi trusts, net of amounts borrowed against the cash surrender value, plus the fair market value of other Rabbi trust investments, was $303 million and $252 million as of December 31, 2020 and 2019, respectively. These assets are not included in the plan assets in the above table, but are reflected in noncurrent investments and restricted cash and investments on the Consolidated Balance Sheets. The fair value of plan assets, projected benefit obligation and accumulated benefit obligation for (1) pension and other postretirement benefit plans with a projected benefit obligation in excess of the fair value of plan assets and (2) pension plans with an accumulated benefit obligation in excess of the fair value of plan assets as of December 31 are as follows (in millions): Pension Other Postretirement 2020 2019 2020 2019 Fair value of plan assets $ 1,782 $ 1,939 $ 417 $ 439 Projected benefit obligation $ 2,069 $ 2,227 $ 451 $ 446 Fair value of plan assets $ 1,064 $ 1,939 Accumulated benefit obligation $ 1,341 $ 2,222 Unrecognized Amounts The portion of the funded status of the plans not yet recognized in net periodic benefit cost as of December 31 is as follows (in millions): Pension Other Postretirement 2020 2019 2020 2019 Net loss (gain) $ 612 $ 653 $ 34 $ (23) Prior service credit (1) (2) (9) (14) Regulatory deferrals 2 1 3 6 Total $ 613 $ 652 $ 28 $ (31) A reconciliation of the amounts not yet recognized as components of net periodic benefit cost for the years ended December 31, 2020 and 2019 is as follows (in millions): Accumulated Other Regulatory Regulatory Comprehensive Asset Liability Loss Total Pension Balance, December 31, 2018 $ 730 $ — $ 16 $ 746 Net (gain) loss arising during the year (38) (33) 10 (61) Net prior service credit arising during the year — — (2) (2) Net amortization (31) — — (31) Total (69) (33) 8 (94) Balance, December 31, 2019 661 (33) 24 652 Net (gain) loss arising during the year (30) 13 10 (7) Net amortization (31) — (1) (32) Total (61) 13 9 (39) Balance, December 31, 2020 $ 600 $ (20) $ 33 $ 613 Accumulated Other Regulatory Regulatory Comprehensive Asset Liability Loss Total Other Postretirement Balance, December 31, 2018 $ 44 $ (10) $ 1 $ 35 Net gain arising during the year (45) (23) (4) (72) Net amortization 5 1 — 6 Total (40) (22) (4) (66) Balance, December 31, 2019 4 (32) (3) (31) Net loss arising during the year 36 12 7 55 Net amortization 7 (3) — 4 Total 43 9 7 59 Balance, December 31, 2020 $ 47 $ (23) $ 4 $ 28 Plan Assumptions Weighted-average assumptions used to determine benefit obligations and net periodic benefit cost were as follows: Pension Other Postretirement 2020 2019 2018 2020 2019 2018 Benefit obligations as of December 31: Discount rate 2.60 % 3.32 % 4.25 % 2.59 % 3.24 % 4.21 % Rate of compensation increase 2.75 % 2.75 % 2.75 % NA NA NA Interest crediting rates for cash balance plan 2018 NA NA 3.38 % NA NA NA 2019 NA 3.22 % 3.54 % NA NA NA 2020 2.44 % 2.94 % 3.54 % NA NA NA 2021 2.25 % 2.94 % 3.56 % NA NA NA 2022 2.25 % 3.02 % 3.56 % NA NA NA 2023 2.65 % 3.02 % 3.56 % NA NA NA Net periodic benefit cost for the years ended December 31: Discount rate 3.32 % 4.25 % 3.60 % 3.24 % 4.21 % 3.57 % Expected return on plan assets 5.94 % 6.48 % 6.36 % 5.42 % 6.39 % 6.44 % Rate of compensation increase 2.75 % 2.75 % 2.75 % NA NA NA Interest crediting rate for cash balance plan 2.44 % 3.22 % 3.38 % NA NA NA In establishing its assumption as to the expected return on plan assets, the Company utilizes the asset allocation and return assumptions for each asset class based on historical performance and forward-looking views of the financial markets. 2020 2019 Assumed healthcare cost trend rates as of December 31: Healthcare cost trend rate assumed for next year 6.30 % 6.50 % Rate that the cost trend rate gradually declines to 5.00 % 5.00 % Year that the rate reaches the rate it is assumed to remain at 2025 2025 Contributions and Benefit Payments Employer contributions to the pension and other postretirement benefit plans are expected to be $13 million and $14 million, respectively, during 2021. Funding to the established pension trusts is based upon the actuarially determined costs of the plans and the requirements of the IRC, the Employee Retirement Income Security Act of 1974 and the Pension Protection Act of 2006, as amended. The Company considers contributing additional amounts from time to time in order to achieve certain funding levels specified under the Pension Protection Act of 2006, as amended. The Company evaluates a variety of factors, including funded status, income tax laws and regulatory requirements, in determining contributions to its other postretirement benefit plans. The expected benefit payments to participants in the Company's pension and other postretirement benefit plans for 2021 through 2025 and for the five years thereafter are summarized below (in millions): Projected Benefit Payments Other Pension Postretirement 2021 $ 236 $ 53 2022 219 54 2023 220 54 2024 211 54 2025 206 52 2026-2030 926 238 Plan Assets Investment Policy and Asset Allocations The Company's investment policy for its pension and other postretirement benefit plans is to balance risk and return through a diversified portfolio of debt securities, equity securities and other alternative investments. Maturities for debt securities are managed to targets consistent with prudent risk tolerances. The plans retain outside investment advisors to manage plan investments within the parameters outlined by the Berkshire Hathaway Energy Company Investment Committee. The investment portfolio is managed in line with the investment policy with sufficient liquidity to meet near-term benefit payments. The target allocations (percentage of plan assets) for the Company's pension and other postretirement benefit plan assets are as follows as of December 31, 2020: Other Pension Postretirement % % PacifiCorp: Debt securities (1) 25-35 75-83 Equity securities (1) 53-68 16-24 Limited partnership interests 7-12 1-3 MidAmerican Energy: Debt securities (1) 50-80 60-70 Equity securities (1) 20-50 30-40 Real estate funds 0-5 — Other 0-5 0-5 NV Energy: Debt securities (1) 60-75 60-70 Equity securities (1) 25-40 30-40 (1) For purposes of target allocation percentages and consistent with the plans' investment policy, investment funds are allocated based on the underlying investments in debt and equity securities. Fair Value Measurements The following table presents the fair value of plan assets, by major category, for the Company's defined benefit pension plans (in millions): Input Levels for Fair Value Measurements (1) Level 1 Level 2 Total As of December 31, 2020: Cash equivalents $ — $ 79 $ 79 Debt securities: United States government obligations 52 — 52 Corporate obligations — 748 748 Municipal obligations — 69 69 Equity securities: United States companies 224 — 224 Total assets in the fair value hierarchy $ 276 $ 896 1,172 Investment funds (2) measured at net asset value 1,521 Limited partnership interests (3) measured at net asset value 88 Real estate funds measured at net asset value 43 Total assets measured at fair value $ 2,824 As of December 31, 2019: Cash equivalents $ 27 $ 36 $ 63 Debt securities: United States government obligations 210 — 210 International government obligations — 5 5 Corporate obligations — 376 376 Municipal obligations — 28 28 Agency, asset and mortgage-backed obligations — 115 115 Equity securities: United States companies 547 1 548 International companies 136 — 136 Investment funds (2) 125 — 125 Total assets in the fair value hierarchy $ 1,045 $ 561 1,606 Investment funds (2) measured at net asset value 915 Limited partnership interests (3) measured at net asset value 93 Real estate funds measured at net asset value 42 Total assets measured at fair value $ 2,656 (1) Refer to Note 15 for additional discussion regarding the three levels of the fair value hierarchy. (2) Investment funds are comprised of mutual funds and collective trust funds. These funds consist of equity and debt securities of approximately 69% and 31%, respectively, for 2020 and 62% and 38%, respectively, for 2019. Additionally, these funds are invested in United States and international securities of approximately 79% and 21%, respectively, for 2020 and 66% and 34%, respectively, for 2019. (3) Limited partnership interests include several funds that invest primarily in real estate, buyout, growth equity and venture capital. The following table presents the fair value of plan assets, by major category, for the Company's defined benefit other postretirement plans (in millions): Input Levels for Fair Value Measurements (1) Level 1 Level 2 Total As of December 31, 2020: Cash equivalents $ 20 $ 2 $ 22 Debt securities: United States government obligations 15 — 15 Corporate obligations — 102 102 Municipal obligations — 82 82 Agency, asset and mortgage-backed obligations — 47 47 Equity securities: United States companies 6 — 6 Investment funds (2) 299 — 299 Total assets in the fair value hierarchy $ 340 $ 233 573 Investment funds (2) measured at net asset value 167 Limited partnership interests (3) measured at net asset value 4 Total assets measured at fair value $ 744 As of December 31, 2019: Cash equivalents $ 17 $ 1 $ 18 Debt securities: United States government obligations 23 — 23 Corporate obligations — 44 44 Municipal obligations — 57 57 Agency, asset and mortgage-backed obligations — 33 33 Equity securities: United States companies 151 — 151 International companies 6 — 6 Investment funds (2) 236 — 236 Total assets in the fair value hierarchy $ 433 $ 135 568 Investment funds (2) measured at net asset value 169 Limited partnership interests (3) measured at net asset value 5 Total assets measured at fair value $ 742 (1) Refer to Note 15 for additional discussion regarding the three levels of the fair value hierarchy. (2) Investment funds are comprised of mutual funds and collective trust funds. These funds consist of equity and debt securities of approximately 40% and 60%, respectively, for 2020 and 58% and 42%, respectively, for 2019. Additionally, these funds are invested in United States and international securities of approximately 79% and 21%, respectively, for 2020 and 75% and 25%, respectively, for 2019. (3) Limited partnership interests include several funds that invest primarily in real estate, buyout, growth equity and venture capital. For level 1 investments, a readily observable quoted market price or net asset value of an identical security in an active market is used to record the fair value. For level 2 investments, the fair value is determined using pricing models based on observable market inputs. Shares of mutual funds not registered under the Securities Act of 1933, private equity limited partnership interests, common and commingled trust funds and investment entities are reported at fair value based on the net asset value per unit, which is used for expedience purposes. A fund's net asset value is based on the fair value of the underlying assets held by the fund less its liabilities. Foreign Operations Certain wholly-owned subsidiaries of Northern Powergrid participate in the Northern Powergrid group of the United Kingdom industry-wide Electricity Supply Pension Scheme (the "UK Plan"), which provides pension and other related defined benefits, based on final pensionable pay, to the employees of Northern Powergrid. The UK Plan is closed to employees hired after July 23, 1997. Employees hired after that date are covered by a defined contribution plan sponsored by a wholly-owned subsidiary of Northern Powergrid. Net Periodic Benefit Cost For purposes of calculating the expected return on pension plan assets, a market-related value is used. The market-related value of plan assets is calculated by including the difference between expected and actual investment returns after the first year in which they occur. Net periodic benefit cost for the UK Plan included the following components for the years ended December 31 (in millions): 2020 2019 2018 Service cost $ 16 $ 16 $ 19 Interest cost 40 49 56 Expected return on plan assets (101) (100) (101) Settlement 17 26 44 Net amortization 43 46 45 Net periodic benefit cost $ 15 $ 37 $ 63 Funded Status The following table is a reconciliation of the fair value of plan assets for the years ended December 31 (in millions): 2020 2019 Plan assets at fair value, beginning of year $ 2,151 $ 1,989 Employer contributions 56 56 Participant contributions 1 1 Actual return on plan assets 181 194 Settlement (63) (99) Benefits paid (67) (71) Foreign currency exchange rate changes 75 81 Plan assets at fair value, end of year $ 2,334 $ 2,151 The following table is a reconciliation of the benefit obligation for the years ended December 31 (in millions): 2020 2019 Benefit obligation, beginning of year $ 2,019 $ 1,833 Service cost 16 16 Interest cost 40 49 Participant contributions 1 1 Actuarial loss 188 175 Settlement (63) (99) Benefits paid (67) (71) Foreign currency exchange rate changes 71 115 Benefit obligation, end of year $ 2,205 $ 2,019 Accumulated benefit obligation, end of year $ 1,963 $ 1,786 The funded status of the UK Plan and the amounts recognized on the Consolidated Balance Sheets as of December 31 are as follows (in millions): 2020 2019 Plan assets at fair value, end of year $ 2,334 $ 2,151 Benefit obligation, end of year 2,205 2,019 Funded status $ 129 $ 132 Amounts recognized on the Consolidated Balance Sheets: Other assets $ 129 $ 132 Unrecognized Amounts The portion of the funded status of the UK Plan not yet recognized in net periodic benefit cost as of December 31 is as follows (in millions): 2020 2019 Net loss $ 612 $ 543 Prior service cost 6 6 Total $ 618 $ 549 A reconciliation of the amounts not yet recognized as components of net periodic benefit cost, which are included in accumulated other comprehensive loss on the Consolidated Balance Sheets, for the years ended December 31 is as follows (in millions): 2020 2019 Balance, beginning of year $ 549 $ 480 Net loss arising during the year 108 81 Settlement (17) (26) Net amortization (43) (46) Foreign currency exchange rate changes 21 60 Total 69 69 Balance, end of year $ 618 $ 549 Plan Assumptions Assumptions used to determine benefit obligations and net periodic benefit cost were as follows: 2020 2019 2018 Benefit obligations as of December 31: Discount rate 1.40 % 2.10 % 2.90 % Rate of compensation increase 3.05 % 3.30 % 3.55 % Rate of future price inflation 2.55 % 2.80 % 3.05 % Net periodic benefit cost for the years ended December 31: Discount rate 2.10 % 2.90 % 2.60 % Expected return on plan assets 5.00 % 5.10 % 4.90 % Rate of compensation increase 3.30 % 3.55 % 3.45 % Rate of future price inflation 2.80 % 3.05 % 2.95 % Contributions and Benefit Payments Employer contributions to the UK Plan are expected to be £50 million during 2021. The expected benefit payments to participants in the UK Plan for 2021 through 2025 and for the five years thereafter, excluding lump sum settlement elections and using the foreign currency exchange rate as of December 31, 2020, are summarized below (in millions): 2021 $ 74 2022 75 2023 77 2024 79 2025 81 2026-2030 431 Plan Assets Investment Policy and Asset Allocations The investment policy for the UK Plan is to balance risk and return through a diversified portfolio of debt securities, equity securities, real estate and other asset classes. Maturities for debt securities are managed to targets consistent with prudent risk tolerances. The UK Plan retains outside investment advisors to manage plan investments within the parameters set by the trustees of the UK Plan in consultation with Northern Powergrid. The investment portfolio is managed in line with the investment policy with sufficient liquidity to meet near-term benefit payments. The return on assets assumption is based on a weighted-average of the expected historical performance for the types of assets in which the UK Plan invests. The target allocations (percentage of plan assets) for the UK Plan assets are as follows as of December 31, 2020: % Debt securities (1) 60-70 Equity securities (1) 10-20 Real estate funds and other 15-25 (1) For purposes of target allocation percentages and consistent with the plans' investment policy, investment funds have been allocated based on the underlying investments in debt and equity securities. Fair Value Measurements The following table presents the fair value of the UK Plan assets, by major category (in millions): Input Levels for Fair Value Measurements (1) Level 1 Level 2 Level 3 Total As of December 31, 2020: Cash equivalents $ 5 $ 49 $ — $ 54 Debt securities: United Kingdom government obligations 1,102 — — 1,102 Equity securities: Investment funds (2) — 833 — 833 Real estate funds — — 237 237 Total $ 1,107 $ 882 $ 237 2,226 Investment funds (2) measured at net asset value 108 Total assets measured at fair value $ 2,334 As of December 31, 2019: Cash equivalents $ 3 $ 24 $ — $ 27 Debt securities: United Kingdom government obligations 960 — — 960 Equity securities: Investment funds (2) — 818 — 818 Real estate funds — — 243 243 Total $ 963 $ 842 $ 243 2,048 Investment funds (2) measured at net asset value 103 Total assets measured at fair value $ 2,151 (1) Refer to Note 15 for additional discussion regarding the three levels of the fair value hierarchy. (2) Investment funds are comprised of mutual funds and collective trust funds. These funds consist of equity and debt securities of approximately 40% and 60%, respectively, for 2020 and 38% and 62%, respectively, for 2019. The fair value of the UK Plan's assets are determined similar to the plan assets of the domestic plans as previously discussed. The following table reconciles the beginning and ending balances of the UK Plan assets measured at fair value using significant Level 3 inputs for the years ended December 31 (in millions): Real Estate Funds 2020 2019 2018 Beginning balance $ 243 $ 239 $ 230 Actual return on plan assets still held at period end (13) (5) 23 Foreign currency exchange rate changes 7 9 (14) Ending balance $ 237 $ 243 $ 239 Defined Contribution Plans The Company sponsors various defined contribution plans covering substantially all employees. The Company's contributions vary depending on the plan, but matching contributions are based on each participant's level of contribution, and certain participants receive contributions based on eligible pre-tax annual compensation. Contributions cannot exceed the maximum allowable for tax purposes. The Company's contributions to these plans were $127 million, $115 million and $112 million for the years ended December 31, 2020, 2019 and 2018, respectively.
Nevada Power Company [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Employee Benefit Plans [Text Block]	Employee Benefit Plans Nevada Power is a participant in benefit plans sponsored by NV Energy. The NV Energy Retirement Plan includes a qualified pension plan ("Qualified Pension Plan") and a supplemental executive retirement plan and a restoration plan (collectively, "Non‑Qualified Pension Plans") that provide pension benefits for eligible employees. The NV Energy Comprehensive Welfare Benefit and Cafeteria Plan provides certain postretirement health care and life insurance benefits for eligible retirees ("Other Postretirement Plans") on behalf of Nevada Power. Nevada Power did not make any contributions to the Qualified Pension Plan for the years ended December 31, 2020 and 2019. Nevada Power contributed $19 million to the Qualified Pension Plan for the year ended December 31, 2018. Nevada Power contributed $1 million to the Non-Qualified Pension Plans for the years ended December 31, 2020, 2019 and 2018. Nevada Power did not make any contributions to the Other Postretirement Plans for the years ended December 31, 2020, 2019 and 2018. Amounts attributable to Nevada Power were allocated from NV Energy based upon the current, or in the case of retirees, previous, employment location. Offsetting regulatory assets and liabilities have been recorded related to the amounts not yet recognized as a component of net periodic benefit costs that will be included in regulated rates. Net periodic benefit costs not included in regulated rates are included in accumulated other comprehensive loss, net. Amounts receivable from (payable to) NV Energy are included on the Consolidated Balance Sheets and consist of the following as of December 31 (in millions): 2020 2019 Qualified Pension Plan: Other non-current assets $ 8 $ — Other long-term liabilities — (18) Non-Qualified Pension Plans: Other current liabilities (1) (1) Other long-term liabilities (9) (9) Other Postretirement Plans: Other non-current assets 4 — Other long-term liabilities — (2)
Sierra Pacific Power Company [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Employee Benefit Plans [Text Block]	Employee Benefit PlansSierra Pacific is a participant in benefit plans sponsored by NV Energy. The NV Energy Retirement Plan includes a qualified pension plan ("Qualified Pension Plan") and a supplemental executive retirement plan and a restoration plan (collectively, "Non‑Qualified Pension Plans") that provide pension benefits for eligible employees. The NV Energy Comprehensive Welfare Benefit and Cafeteria Plan provides certain postretirement health care and life insurance benefits for eligible retirees ("Other Postretirement Plans") on behalf of Sierra Pacific. Sierra Pacific did not make any contributions to the Qualified Pension Plan for the years ended December 31, 2020 and 2019. Sierra Pacific contributed $6 million to the Qualified Pension Plan for the year ended December 31, 2018. Sierra Pacific contributed $1 million to the Non-Qualified Pension Plans for the years ended December 31, 2020, 2019 and 2018. Sierra Pacific did not make any contributions to the Other Post Retirement Plans for the years ended December 31, 2020 and 2019. Sierra Pacific contributed $6 million to the Other Postretirement Plans for the year ended December 31, 2018. Amounts attributable to Sierra Pacific were allocated from NV Energy based upon the current, or in the case of retirees, previous, employment location. Offsetting regulatory assets and liabilities have been recorded related to the amounts not yet recognized as a component of net periodic benefit costs that will be included in regulated rates. Net periodic benefit costs not included in regulated rates are included in accumulated other comprehensive loss, net. Amounts receivable from (payable to) NV Energy are included on the Balance Sheets and consist of the following as of December 31 (in millions): 2020 2019 Qualified Pension Plan: Other non-current assets $ 26 $ — Other long-term liabilities — (4) Non-Qualified Pension Plans: Other current liabilities (1) (1) Other long-term liabilities (8) (8) Other Postretirement Plans - Other long-term liabilities (13) (7)

Asset Retirement Obligations (N

Asset Retirement Obligations (Notes)	12 Months Ended
	Dec. 31, 2020
Asset Retirement Obligations Disclosure [Line Items]
Asset Retirement Obligations [Text Block]	Asset Retirement Obligations The Company estimates its ARO liabilities based upon detailed engineering calculations of the amount and timing of the future cash spending for a third party to perform the required work. Spending estimates are escalated for inflation and then discounted at a credit-adjusted, risk-free rate. Changes in estimates could occur for a number of reasons, including changes in laws and regulations, plan revisions, inflation and changes in the amount and timing of the expected work. The Company does not recognize liabilities for AROs for which the fair value cannot be reasonably estimated. Due to the indeterminate removal date, the fair value of the associated liabilities on certain generation, transmission, distribution and other assets cannot currently be estimated, and no amounts are recognized on the Consolidated Financial Statements other than those included in the cost of removal regulatory liability established via approved depreciation rates in accordance with accepted regulatory practices. These accruals totaled $2.4 billion as of December 31, 2020 and 2019. The following table presents the Company's ARO liabilities by asset type as of December 31 (in millions): 2020 2019 Fossil fuel facilities $ 529 $ 623 Quad Cities Station 376 358 Wind generating facilities 273 211 Offshore pipeline facilities 16 15 Solar generating facilities 24 21 Other 123 44 Total asset retirement obligations $ 1,341 $ 1,272 Quad Cities Station nuclear decommissioning trust funds $ 676 $ 599 The following table reconciles the beginning and ending balances of the Company's ARO liabilities for the years ended December 31 (in millions): 2020 2019 Beginning balance $ 1,272 $ 985 Change in estimated costs 46 257 Acquisitions 122 — Additions 51 43 Retirements (201) (61) Accretion 51 48 Ending balance $ 1,341 $ 1,272 Reflected as: Other current liabilities $ 184 $ 167 Other long-term liabilities 1,157 1,105 Total ARO liability $ 1,341 $ 1,272 The Nuclear Regulatory Commission regulates the decommissioning of nuclear power plants, which includes the planning and funding for the decommissioning. In accordance with these regulations, MidAmerican Energy submits a biennial report to the Nuclear Regulatory Commission providing reasonable assurance that funds will be available to pay for its share of the Quad Cities Station decommissioning. Certain of the Company's decommissioning and reclamation obligations relate to jointly owned facilities and mine sites, and as such, each subsidiary is committed to pay a proportionate share of the decommissioning or reclamation costs. In the event of a default by any of the other joint participants, the respective subsidiary may be obligated to absorb, directly or by paying additional sums to the entity, a proportionate share of the defaulting party's liability. The Company's estimated share of the decommissioning and reclamation obligations are primarily recorded as ARO liabilities. Following groundwater testing at its coal combustion residuals ("CCR") surface impoundments, MidAmerican Energy discontinued sending CCR to surface impoundments and initiated analysis of additional actions to be taken. As a result of that analysis, MidAmerican Energy is removing all CCR material located below the water table and capping the material in such facilities, which is a more extensive closure activity than previously assumed. In 2019, MidAmerican Energy increased the AROs for its fossil-fueled generating facilities by $237 million related to the cost of this closure activity. Closure activity on the six existing surface impoundments is estimated to extend through 2023.
PacifiCorp [Member]
Asset Retirement Obligations Disclosure [Line Items]
Asset Retirement Obligations [Text Block]	Asset Retirement Obligations PacifiCorp estimates its ARO liabilities based upon detailed engineering calculations of the amount and timing of the future cash spending for a third party to perform the required work. Spending estimates are escalated for inflation and then discounted at a credit-adjusted, risk-free rate. Changes in estimates could occur for a number of reasons, including changes in laws and regulations, plan revisions, inflation and changes in the amount and timing of the expected work. PacifiCorp does not recognize liabilities for AROs for which the fair value cannot be reasonably estimated. Due to the indeterminate removal date, the fair value of the associated liabilities on certain transmission, distribution and other assets cannot currently be estimated, and no amounts are recognized on the Consolidated Financial Statements other than those included in the cost of removal regulatory liability established via approved depreciation rates in accordance with accepted regulatory practices. Cost of removal regulatory liabilities totaled $1,125 million and $1,019 million as of December 31, 2020 and 2019, respectively. The following table reconciles the beginning and ending balances of PacifiCorp's ARO liabilities for the years ended December 31 (in millions): 2020 2019 Beginning balance $ 257 $ 227 Change in estimated costs (11) 27 Additions 25 9 Retirements (10) (15) Accretion 9 9 Ending balance $ 270 $ 257 Reflected as: Other current liabilities $ 13 $ 19 Other long-term liabilities 257 238 $ 270 $ 257 Certain of PacifiCorp's decommissioning and reclamation obligations relate to jointly owned facilities and mine sites. PacifiCorp is committed to pay a proportionate share of the decommissioning or reclamation costs. In the event of a default by any of the other joint participants, PacifiCorp may be obligated to absorb, directly or by paying additional sums to the entity, a proportionate share of the defaulting party's liability. PacifiCorp's estimated share of the decommissioning and reclamation obligations are primarily recorded as ARO liabilities.
MidAmerican Energy Company [Member]
Asset Retirement Obligations Disclosure [Line Items]
Asset Retirement Obligations [Text Block]	MidAmerican Energy estimates its ARO liabilities based upon detailed engineering calculations of the amount and timing of the future cash spending for a third party to perform the required work. Spending estimates are escalated for inflation and then discounted at a credit-adjusted, risk-free rate. Changes in estimates could occur for a number of reasons, including changes in laws and regulations, plan revisions, inflation and changes in the amount and timing of the expected work. MidAmerican Energy does not recognize liabilities for AROs for which the fair value cannot be reasonably estimated. Due to the indeterminate removal date, the fair value of the associated liabilities on certain generation, transmission, distribution and other assets cannot currently be estimated, and no amounts are recognized on the Financial Statements other than those included in the cost of removal regulatory liability established via approved depreciation rates in accordance with accepted regulatory practices. These accruals totaled $466 million and $572 million as of December 31, 2020 and 2019, respectively. The following table presents MidAmerican Energy's ARO liabilities by asset type as of December 31 (in millions): 2020 2019 Quad Cities Station $ 376 $ 358 Fossil-fueled generating facilities 255 325 Wind-powered generating facilities 185 154 Other 2 2 Total asset retirement obligations $ 818 $ 839 Quad Cities Station nuclear decommissioning trust funds (1) $ 676 $ 599 (1) Refer to Note 6 for a discussion of the Quad Cities Station nuclear decommissioning trust funds. The following table reconciles the beginning and ending balances of MidAmerican Energy's ARO liabilities for the years ended December 31 (in millions): 2020 2019 Beginning balance $ 839 $ 562 Change in estimated costs 47 234 Additions 23 27 Retirements (124) (14) Accretion 33 30 Ending balance $ 818 $ 839 Reflected as: Other current liabilities $ 109 $ 135 Asset retirement obligations 709 704 $ 818 $ 839 Following groundwater testing at its coal combustion residuals ("CCR") surface impoundments, MidAmerican Energy discontinued sending CCR to surface impoundments and initiated analysis of additional actions to be taken. As a result of that analysis, MidAmerican Energy is removing all CCR material located below the water table and capping the material in such facilities, which is a more extensive closure activity than previously assumed. In 2019, MidAmerican Energy increased the AROs for its fossil-fueled generating facilities by $237 million related to the cost of this closure activity. Closure activity on the six existing surface impoundments is estimated to extend through 2023. Retirements in 2020 and 2019 relate to settlements of MidAmerican Energy's CCR ARO liabilities.
MidAmerican Funding, LLC and Subsidiaries [Member]
Asset Retirement Obligations Disclosure [Line Items]
Asset Retirement Obligations [Text Block]	Refer to Note 11 of MidAmerican Energy's Notes to Financial Statements.
Nevada Power Company [Member]
Asset Retirement Obligations Disclosure [Line Items]
Asset Retirement Obligations [Text Block]	Asset Retirement Obligations Nevada Power estimates its ARO liabilities based upon detailed engineering calculations of the amount and timing of the future cash spending for a third party to perform the required work. Spending estimates are escalated for inflation and then discounted at a credit-adjusted, risk-free rate. Changes in estimates could occur for a number of reasons, including changes in laws and regulations, plan revisions, inflation and changes in the amount and timing of the expected work. Nevada Power does not recognize liabilities for AROs for which the fair value cannot be reasonably estimated. Due to the indeterminate removal date, the fair value of the associated liabilities on certain generation, transmission, distribution and other assets cannot currently be estimated, and no amounts are recognized on the Consolidated Financial Statements other than those included in the cost of removal regulatory liability established via approved depreciation rates in accordance with accepted regulatory practices. These accruals totaled $340 million and $332 million as of December 31, 2020 and 2019, respectively. The following table presents Nevada Power's ARO liabilities by asset type as of December 31 (in millions): 2020 2019 Waste water remediation $ 36 $ 37 Evaporative ponds and dry ash landfills 13 12 Solar 3 2 Other 20 23 Total asset retirement obligations $ 72 $ 74 The following table reconciles the beginning and ending balances of Nevada Power's ARO liabilities for the years ended December 31 (in millions): 2020 2019 Beginning balance $ 74 $ 83 Change in estimated costs 9 6 Retirements (14) (19) Accretion 3 4 Ending balance $ 72 $ 74 Reflected as: Other current liabilities $ 25 $ 14 Other long-term liabilities 47 60 $ 72 $ 74 In 2008, Nevada Power signed an administrative order of consent as owner and operator of Reid Gardner Generating Station Unit Nos. 1, 2 and 3 and as co-owner and operating agent of Unit No. 4. Based on the administrative order of consent, Nevada Power recorded estimated AROs and capital remediation costs. However, actual costs of work under the administrative order of consent may vary significantly once the scope of work is defined and additional site characterization has been completed. In connection with the termination of the co-ownership arrangement, effective October 22, 2013, between Nevada Power and California Department of Water Resources ("CDWR") for the Reid Gardner Generating Station Unit No. 4, Nevada Power and CDWR entered into a cost-sharing agreement that sets forth how the parties will jointly share in costs associated with all investigation, characterization and, if necessary, remedial activities as required under the administrative order of consent. Certain of Nevada Power's decommissioning and reclamation obligations relate to jointly-owned facilities, and as such, Nevada Power is committed to pay a proportionate share of the decommissioning or reclamation costs. In the event of a default by any of the other joint participants, the respective subsidiary may be obligated to absorb, directly or by paying additional sums to the entity, a proportionate share of the defaulting party's liability. Management has identified legal obligations to retire generation plant assets specified in land leases for Nevada Power's jointly-owned Navajo Generating Station, retired in November 2019, and the Higgins Generating Station. Provisions of the lease require the lessees to remove the facilities upon request of the lessors at the expiration of the leases. Nevada Power's estimated share of the decommissioning and reclamation obligations are primarily recorded as ARO liabilities in other long-term liabilities on the Consolidated Balance Sheets.
Sierra Pacific Power Company [Member]
Asset Retirement Obligations Disclosure [Line Items]
Asset Retirement Obligations [Text Block]	Asset Retirement Obligations Sierra Pacific estimates its ARO liabilities based upon detailed engineering calculations of the amount and timing of the future cash spending for a third party to perform the required work. Spending estimates are escalated for inflation and then discounted at a credit-adjusted, risk-free rate. Changes in estimates could occur for a number of reasons, including changes in laws and regulations, plan revisions, inflation and changes in the amount and timing of the expected work. Sierra Pacific does not recognize liabilities for AROs for which the fair value cannot be reasonably estimated. Due to the indeterminate removal date, the fair value of the associated liabilities on certain generation, transmission, distribution and other assets cannot currently be estimated, and no amounts are recognized on the Financial Statements other than those included in the cost of removal regulatory liability established via approved depreciation rates in accordance with accepted regulatory practices. These accruals totaled $197 million and $217 million as of December 31, 2020 and 2019, respectively. The following table presents Sierra Pacific's ARO liabilities by asset type as of December 31 (in millions): 2020 2019 Asbestos $ 5 $ 5 Evaporative ponds and dry ash landfills 3 2 Other 3 3 Total asset retirement obligations $ 11 $ 10 The following table reconciles the beginning and ending balances of Sierra Pacific's ARO liabilities for the years ended December 31 (in millions): 2020 2019 Beginning balance $ 10 $ 10 Accretion 1 — Ending balance $ 11 $ 10 Reflected as - Other long-term liabilities $ 11 $ 10
Eastern Energy Gas Holdings, LLC [Member]
Asset Retirement Obligations Disclosure [Line Items]
Asset Retirement Obligations [Text Block]	Asset Retirement Obligations Eastern Energy Gas estimates its ARO liabilities based upon detailed engineering calculations of the amount and timing of the future cash spending for a third party to perform the required work. Spending estimates are escalated for inflation and then discounted at a credit-adjusted, risk-free rate. Changes in estimates could occur for a number of reasons, including changes in laws and regulations, plan revisions, inflation and changes in the amount and timing of the expected work. Eastern Energy Gas does not recognize liabilities for AROs for which the fair value cannot be reasonably estimated. Due to the indeterminate removal date, the fair value of the associated liabilities on the Cove Point LNG facility, interim removal of natural gas pipelines and certain storage wells in EGTS' underground natural gas storage network cannot currently be estimated, and no amounts are recognized on the Consolidated Financial Statements other than those included in the cost of removal regulatory liability established via approved depreciation rates in accordance with accepted regulatory practices. Cost of removal regulatory liabilities totaled $88 million and $73 million as of December 31, 2020 and 2019, respectively. Eastern Energy Gas will continue to monitor operational and strategic developments to identify if sufficient information exists to reasonably estimate a retirement date for these assets. The following table reconciles the beginning and ending balances of Eastern Energy Gas' ARO liabilities for the years ended December 31 (in millions): 2020 2019 Beginning balance $ 89 $ 88 Change in estimated costs (51) — Additions 48 — Retirements (3) (3) Disposal of Questar Pipeline Group (16) — Accretion 4 4 Ending balance $ 71 $ 89 Reflected as: Other current liabilities $ 36 $ 14 Other long-term liabilities 35 75 Total ARO liability $ 71 $ 89

Commitments and Contingencies (

Commitments and Contingencies (Notes)	12 Months Ended
	Dec. 31, 2020
Contractual Obligation [Line Items]
Commitments and Contingencies	Commitments and Contingencies Commitments The Company has the following firm commitments that are not reflected on the Consolidated Balance Sheet. Minimum payments as of December 31, 2020 are as follows (in millions): 2026 and 2021 2022 2023 2024 2025 Thereafter Total Contract type: Fuel, capacity and transmission contract commitments $ 2,122 $ 1,559 $ 1,307 $ 1,285 $ 1,047 $ 12,985 $ 20,305 Construction commitments 783 372 148 — — 4 1,307 Easements 72 74 74 73 73 2,229 2,595 Maintenance, service and other contracts 413 366 313 257 210 1,435 2,994 $ 3,390 $ 2,371 $ 1,842 $ 1,615 $ 1,330 $ 16,653 $ 27,201 Fuel, Capacity and Transmission Contract Commitments The Utilities have fuel supply and related transportation and lime contracts for their coal- and natural gas-fueled generating facilities. The Utilities expect to supplement these contracts with additional contracts and spot market purchases to fulfill their future fossil fuel needs. The Utilities acquire a portion of their electricity through long-term purchases and exchange agreements. The Utilities have several power purchase agreements with renewable generating facilities that are not included in the table above as the payments are based on the amount of energy generated and there are no minimum payments. The Utilities also have contracts for the right to transmit electricity over other entities' transmission lines to facilitate delivery to their customers. MidAmerican Energy has long-term rail transportation contracts with BNSF Railway Company ("BNSF"), an affiliate company, and Union Pacific Railroad Company for the transportation of coal to all of the MidAmerican Energy-operated coal-fueled generating facilities. For the years ended December 31, 2020, 2019 and 2018, $90 million, $123 million and $111 million, respectively, were incurred for coal transportation services, the majority of which was related to the BNSF agreement. Construction Commitments The Company's firm construction commitments reflected in the table above include the following major construction projects: • PacifiCorp's costs associated with certain generating plant, transmission and distribution projects. • MidAmerican Energy's firm construction commitments primarily consisting of contracts for the repowering and construction of wind-powered generating facilities. • Nevada Power's firm construction commitment consisting of costs associated with the planned Dry Lake generating facility, a 150 MW solar photovoltaic facility with an additional 100 MW capacity of co-located battery storage that will be developed in Clark County, Nevada and certain other generating plant projects. • AltaLink's investments in directly assigned transmission projects from the AESO. Easements The Company has non-cancelable easements for land on which certain of its assets, primarily wind-powered generating facilities, are located. Maintenance, Service and Other Contracts The Company has entered into service agreements related to its nonregulated solar and wind-powered projects with third parties to operate and maintain the projects under fixed-fee operating and maintenance agreements. Additionally, the Company has various non-cancelable maintenance, service and other contracts primarily related to turbine and equipment maintenance and various other service agreements. Legal Matters The Company is party to a variety of legal actions arising out of the normal course of business. Plaintiffs occasionally seek punitive or exemplary damages. The Company does not believe that such normal and routine litigation will have a material impact on its consolidated financial results. California and Oregon 2020 Wildfires In September 2020, a severe weather event resulting in high winds, low humidity and warm temperatures contributed to several major wildfires, private and public property damage, personal injuries and loss of life and widespread power outages in Oregon and Northern California (the "2020 Wildfires"). The wildfires spread across certain parts of PacifiCorp's service territory and surrounding areas across multiples counties in Oregon and California, including Siskiyou County, California; Jackson County, Oregon; Douglas County, Oregon; Marion County, Oregon; Lincoln County, Oregon; and Klamath County, Oregon burning over 500,000 acres in aggregate. Third party reports for these wildfires indicate over 2,000 structures, including residences, destroyed; several structures damaged; multiple individuals injured; and several fatalities. Fire suppression costs estimated by various agencies total approximately $150 million. Investigations into the cause and origin of each wildfire are complex and ongoing and are being conducted by various entities, including the United States Forest Service, the California Public Utilities Commission, the Oregon Department of Forestry, the Oregon Department of Justice, PacifiCorp and various experts engaged by PacifiCorp. Five lawsuits have been filed in Oregon and California, including a putative class action complaint in Oregon, on behalf of citizens and businesses who suffered damages from fires allegedly caused by PacifiCorp. The final determinations of liability, however, will only be made following comprehensive investigations and litigation processes. In California, under inverse condemnation, courts have held that investor-owned utilities can be liable for real and personal property damages without the utility being found negligent and regardless of fault. California law also permits inverse condemnation plaintiffs to recover reasonable attorney fees and costs. In both Oregon and California, PacifiCorp has equipment in areas accessed through special use permits, easements or similar agreements that may contain provisions requiring it to pay for damages caused by its equipment regardless of fault. Even if inverse condemnation or other provisions do not apply, PacifiCorp could nevertheless be found liable for all damages proximately caused by negligence, including property and natural resource damage; fire suppression costs; personal injury and loss of life damages; and interest. PacifiCorp has accrued $136 million as its best estimate of the potential losses net of expected insurance recoveries associated with the 2020 Wildfires that are considered probable of being incurred. These accruals include estimated losses for fire suppression costs, property damage, personal injury damages and loss of life damages. It is reasonably possible that PacifiCorp will incur additional losses beyond the amounts accrued; however, PacifiCorp is currently unable to estimate the range of possible additional losses that could be incurred due to the number of properties and parties involved and the lack of specific claims for all potential claimants. To the extent losses beyond the amounts accrued are incurred, additional insurance coverage is expected to be available to cover at least a portion of the losses. Environmental Laws and Regulations The Company is subject to federal, state, local and foreign laws and regulations regarding climate change, renewable portfolio standards, air and water quality, emissions performance standards, coal combustion byproduct disposal, hazardous and solid waste disposal, protected species and other environmental matters that have the potential to impact the Company's current and future operations. The Company believes it is in material compliance with all applicable laws and regulations. Hydroelectric Relicensing PacifiCorp is a party to the 2016 amended Klamath Hydroelectric Settlement Agreement ("KHSA"), which is intended to resolve disputes surrounding PacifiCorp's efforts to relicense the Klamath Hydroelectric Project. The KHSA establishes a process for PacifiCorp, the states of Oregon and California ("States") and other stakeholders to assess whether dam removal can occur consistent with the settlement's terms. For PacifiCorp, the key elements of the settlement include: (1) a contribution from PacifiCorp's Oregon and California customers capped at $200 million plus $250 million in California bond funds; (2) complete indemnification from harms associated with dam removal; (3) transfer of the Federal Energy Regulatory Commission ("FERC") license to a third-party dam removal entity, the Klamath River Renewal Corporation ("KRRC"), who would conduct dam removal; and (4) ability for PacifiCorp to operate the facilities for the benefit of customers until dam removal commences. In September 2016, the KRRC and PacifiCorp filed a joint application with the FERC to transfer the license for the four mainstem Klamath dams from PacifiCorp to the KRRC. The FERC approved partial transfer of the Klamath license in a July 2020 order, subject to the condition that PacifiCorp remains co-licensee. Under the amended KHSA, PacifiCorp did not agree to remain co-licensee during the surrender and removal process given concerns about liability protections for PacifiCorp and its customers. In November 2020, PacifiCorp entered a memorandum of agreement (the "MOA") with the KRRC, the Karuk Tribe, the Yurok Tribe and the States to continue implementation of the KHSA. The agreement required the States, PacifiCorp and KRRC to file a new license transfer application by January 16, 2021 to remove PacifiCorp from the license for the Klamath Hydroelectric Project and add the States and KRRC as co-licensees for the purposes of surrender. On January 13, 2021, the new license transfer application was filed with the FERC, notifying it that PacifiCorp and the KRRC are not accepting co-licensee status under FERC's July 2020 order, and instead are seeking the license transfer outcome described in the new license transfer application. In addition, the MOA provides for additional contingency funding of $45 million, equally split between PacifiCorp and the States, and for PacifiCorp and the States to equally share in any additional cost overruns in the unlikely event that dam removal costs exceed the $450 million in funding to ensure dam removal is complete. The MOA also requires PacifiCorp to cover the costs associated with certain pre-existing environmental conditions. As of December 31, 2020, PacifiCorp's assets included $21 million of costs associated with the Klamath hydroelectric system's mainstem dams and the associated relicensing and settlement costs, which are being depreciated and amortized in accordance with state regulatory approvals in Utah, Wyoming and Idaho through December 31, 2022. Hydroelectric Commitments Certain of PacifiCorp's hydroelectric licenses contain requirements for PacifiCorp to make certain capital and operating expenditures related to its hydroelectric facilities, which are estimated to be approximately $182 million over the next ten years.
PacifiCorp [Member]
Contractual Obligation [Line Items]
Commitments and Contingencies	Commitments and Contingencies Legal Matters PacifiCorp is party to a variety of legal actions arising out of the normal course of business. Plaintiffs occasionally seek punitive or exemplary damages. PacifiCorp does not believe that such normal and routine litigation will have a material impact on its consolidated financial results. California and Oregon 2020 Wildfires In September 2020, a severe weather event resulting in high winds, low humidity and warm temperatures contributed to several major wildfires, private and public property damage, personal injuries and loss of life and widespread power outages in Oregon and Northern California. The wildfires spread across certain parts of PacifiCorp's service territory and surrounding areas across multiples counties in Oregon and California, including Siskiyou County, California; Jackson County, Oregon; Douglas County, Oregon; Marion County, Oregon; Lincoln County, Oregon; and Klamath County, Oregon burning over 500,000 acres in aggregate. Third party reports for these wildfires indicate over 2,000 structures, including residences, destroyed; several structures damaged; multiple individuals injured; and several fatalities. Fire suppression costs estimated by various agencies total approximately $150 million. Investigations into the cause and origin of each wildfire are complex and ongoing and are being conducted by various entities, including the United States Forest Service, the California Public Utilities Commission, the Oregon Department of Forestry, the Oregon Department of Justice, PacifiCorp and various experts engaged by PacifiCorp. Five lawsuits have been filed in Oregon and California, including a putative class action complaint in Oregon, on behalf of citizens and businesses who suffered damages from fires allegedly caused by PacifiCorp. The final determinations of liability, however, will only be made following comprehensive investigations and litigation processes. In California, under inverse condemnation, courts have held that investor-owned utilities can be liable for real and personal property damages without the utility being found negligent and regardless of fault. California law also permits inverse condemnation plaintiffs to recover reasonable attorney fees and costs. In both Oregon and California, PacifiCorp has equipment in areas accessed through special use permits, easements or similar agreements that may contain provisions requiring it to pay for damages caused by its equipment regardless of fault. Even if inverse condemnation or other provisions do not apply, PacifiCorp could nevertheless be found liable for all damages proximately caused by negligence, including property and natural resource damage; fire suppression costs; personal injury and loss of life damages; and interest. PacifiCorp has accrued $136 million as its best estimate of the potential losses net of expected insurance recoveries associated with the 2020 Wildfires that are considered probable of being incurred. These accruals include estimated losses for fire suppression costs, property damage, personal injury damages and loss of life damages. It is reasonably possible that PacifiCorp will incur additional losses beyond the amounts accrued; however, PacifiCorp is currently unable to estimate the range of possible additional losses that could be incurred due to the number of properties and parties involved and the lack of specific claims for all potential claimants. To the extent losses beyond the amounts accrued are incurred, additional insurance coverage is expected to be available to cover at least a portion of the losses. Environmental Laws and Regulations PacifiCorp is subject to federal, state and local laws and regulations regarding air and water quality, renewable portfolio standards, emissions performance standards, climate change, coal combustion byproduct disposal, hazardous and solid waste disposal, protected species and other environmental matters that have the potential to impact PacifiCorp's current and future operations. PacifiCorp believes it is in material compliance with all applicable laws and regulations. Hydroelectric Relicensing PacifiCorp is a party to the 2016 amended Klamath Hydroelectric Settlement Agreement ("KHSA"), which is intended to resolve disputes surrounding PacifiCorp's efforts to relicense the Klamath Hydroelectric Project. The KHSA establishes a process for PacifiCorp, the states of Oregon and California ("States") and other stakeholders to assess whether dam removal can occur consistent with the settlement's terms. For PacifiCorp, the key elements of the settlement include: (1) a contribution from PacifiCorp's Oregon and California customers capped at $200 million plus $250 million in California bond funds; (2) complete indemnification from harms associated with dam removal; (3) transfer of the Federal Energy Regulatory Commission ("FERC") license to a third-party dam removal entity, the Klamath River Renewal Corporation ("KRRC"), who would conduct dam removal; and (4) ability for PacifiCorp to operate the facilities for the benefit of customers until dam removal commences. In September 2016, the KRRC and PacifiCorp filed a joint application with the FERC to transfer the license for the four mainstem Klamath dams from PacifiCorp to the KRRC. The FERC approved partial transfer of the Klamath license in a July 2020 order, subject to the condition that PacifiCorp remains co-licensee. Under the amended KHSA, PacifiCorp did not agree to remain co-licensee during the surrender and removal process given concerns about liability protections for PacifiCorp and its customers. In November 2020, PacifiCorp entered a memorandum of agreement (the "MOA") with the KRRC, the Karuk Tribe, the Yurok Tribe and the States to continue implementation of the KHSA. The agreement required the States, PacifiCorp and KRRC to file a new license transfer application by January 16, 2021 to remove PacifiCorp from the license for the Klamath Hydroelectric Project and add the States and KRRC as co-licensees for the purposes of surrender. On January 13, 2021, the new license transfer application was filed with the FERC, notifying it that PacifiCorp and the KRRC are not accepting co-licensee status under FERC's July 2020 order, and instead are seeking the license transfer outcome described in the new license transfer application. In addition, the MOA provides for additional contingency funding of $45 million, equally split between PacifiCorp and the States, and for PacifiCorp and the States to equally share in any additional cost overruns in the unlikely event that dam removal costs exceed the $450 million in funding to ensure dam removal is complete. The MOA also requires PacifiCorp to cover the costs associated with certain pre-existing environmental conditions. As of December 31, 2020, PacifiCorp's assets included $21 million of costs associated with the Klamath hydroelectric system's mainstem dams and the associated relicensing and settlement costs, which are being depreciated and amortized in accordance with state regulatory approvals in Utah, Wyoming and Idaho through December 31, 2022. Hydroelectric Commitments Certain of PacifiCorp's hydroelectric licenses contain requirements for PacifiCorp to make certain capital and operating expenditures related to its hydroelectric facilities, which are estimated to be approximately $182 million over the next ten years. Commitments PacifiCorp has the following firm commitments that are not reflected on the Consolidated Balance Sheet. Minimum payments as of December 31, 2020 are as follows (in millions): 2021 2022 2023 2024 2025 2026 and Thereafter Total Contract type: Purchased electricity contracts - commercially operable $ 223 $ 201 $ 195 $ 192 $ 172 $ 2,028 $ 3,011 Purchased electricity contracts - non-commercially operable 25 25 25 26 28 456 585 Fuel contracts 636 426 368 320 137 611 2,498 Construction commitments 90 — — — — — 90 Transmission 104 97 90 74 49 409 823 Easements 14 14 13 13 13 278 345 Maintenance, service and other contracts 100 69 40 35 36 214 494 Total commitments $ 1,192 $ 832 $ 731 $ 660 $ 435 $ 3,996 $ 7,846 Purchased Electricity Contracts - Commercially Operable As part of its energy resource portfolio, PacifiCorp acquires a portion of its electricity through long-term purchases and exchange agreements. PacifiCorp has several PPAs with solar or wind-powered generating facilities that are not included in the table above as the payments are based on the amount of energy generated and there are no minimum payments. Certain of these PPAs qualify as leases as described in Note 2. Refer to Note 5 for variable lease costs associated with these lease commitments. Included in the minimum fixed annual payments for purchased electricity above are commitments to purchase electricity from several hydroelectric systems under long-term arrangements with public utility districts. These purchases are made on a "cost-of-service" basis for a stated percentage of system output and for a like percentage of system operating expenses and debt service. These costs are included in energy costs on the Consolidated Statements of Operations. PacifiCorp is required to pay its portion of operating costs and its portion of the debt service, whether or not any electricity is produced. These arrangements accounted for less than 5% of PacifiCorp's 2020, 2019 and 2018 energy sources. Purchased Electricity Contracts - Non-commercially Operable PacifiCorp has several contracts for purchases of electricity from facilities that have not yet achieved commercial operation. To the extent any of these facilities do not achieve commercial operation, PacifiCorp has no obligation to the counterparty. Fuel Contracts PacifiCorp has "take or pay" coal and natural gas contracts that require minimum payments. Construction Commitments PacifiCorp's construction commitments included in the table above relate to firm commitments and include costs associated with certain generating plant, transmission, and distribution projects. Transmission PacifiCorp has contracts for the right to transmit electricity over other entities' transmission lines to facilitate delivery to PacifiCorp's customers. Easements PacifiCorp has non-cancelable easements for land on which certain of its assets, primarily wind-powered generating facilities, are located. Guarantees PacifiCorp has entered into guarantees as part of the normal course of business and the sale or transfer of certain assets. These guarantees are not expected to have a material impact on PacifiCorp's consolidated financial results.
MidAmerican Energy Company [Member]
Contractual Obligation [Line Items]
Commitments and Contingencies	Commitments MidAmerican Energy had the following firm commitments that are not reflected on the Balance Sheet. Minimum payments as of December 31, 2020, are as follows (in millions): 2026 and 2021 2022 2023 2024 2025 Thereafter Total Contract type: Coal and natural gas for generation $ 86 $ 55 $ 43 $ — $ — $ — $ 184 Electric capacity and transmission 29 18 9 9 9 25 99 Natural gas contracts for gas operations 121 79 51 21 13 23 308 Construction commitments 442 287 2 — — 4 735 Easements 38 39 40 41 41 1,542 1,741 Maintenance, services and other 156 159 159 123 92 358 1,047 $ 872 $ 637 $ 304 $ 194 $ 155 $ 1,952 $ 4,114 Coal, Natural Gas, Electric Capacity and Transmission Commitments MidAmerican Energy has coal supply and related transportation and lime contracts for its coal-fueled generating facilities. MidAmerican Energy expects to supplement the coal contracts with additional contracts and spot market purchases to fulfill its future coal supply needs. Additionally, MidAmerican Energy has a natural gas transportation contract for a natural gas-fueled generating facility. The contracts have minimum payment commitments ranging through 2023. MidAmerican Energy has various natural gas supply and transportation contracts for its regulated natural gas operations that have minimum payment commitments ranging through 2042. MidAmerican Energy has contracts to purchase electric capacity that have minimum payment commitments ranging through 2030. MidAmerican Energy also has contracts for the right to transmit electricity over other entities' transmission lines with minimum payment commitments ranging through 2022. Construction Commitments MidAmerican Energy's firm construction commitments reflected in the table above consist primarily of contracts for the repowering and construction of wind-powered generating facilities and the settlement of AROs. Easements MidAmerican Energy has non-cancelable easements with minimum payment commitments ranging through 2061 for land in Iowa on which certain of its assets, primarily wind-powered generating facilities, are located. Maintenance, Services and Other Contracts MidAmerican Energy has other non-cancelable contracts primarily related to maintenance and services for various generating facilities with minimum payment commitments ranging through 2031. Environmental Laws and Regulations MidAmerican Energy is subject to federal, state and local laws and regulations regarding air and water quality, emissions performance standards, climate change, coal combustion byproduct disposal, hazardous and solid waste disposal, protected species and other environmental matters that have the potential to impact its current and future operations. MidAmerican Energy believes it is in material compliance with all applicable laws and regulations. Transmission Rates MidAmerican Energy's wholesale transmission rates are set annually using FERC-approved formula rates subject to true-up for actual cost of service. MidAmerican Energy is authorized by the FERC to include a 0.50% adder beyond the approved base return on equity ("ROE") effective January 2015. Prior to September 2016, the rates in effect were based on a 12.38% ROE. In November 2013 and February 2015, a coalition of intervenors filed successive complaints with the FERC requesting that the 12.38% ROE no longer be found just and reasonable and sought to reduce the base ROE to 9.15% and 8.67%, respectively. In September 2016, the FERC issued an order for the first complaint, which reduces the base ROE to 10.32% and required refunds, plus interest, for the period from November 2013 through February 2015. Customer refunds relative to the first complaint occurred in February 2017. In November 2019, the FERC issued an order addressing the second complaint and issues on appeal in the first complaint. The order established an ROE of 9.88% (10.38% including the 0.50% adder) for the 15-month refund period of the first complaint and prospectively from September 2016 forward. In May 2020, the FERC issued an order on rehearing of the November 2019 order. The May 2020 order affirmed the FERC's prior decision to dismiss the second complaint and established an ROE of 10.02% (10.52% including the 0.50% adder) for the 15-month refund period of the first complaint and prospectively from September 2016 to the date of the May 2020 order. These orders continue to be subject to judicial appeal. MidAmerican Energy cannot predict the ultimate outcome of these matters and, as of December 31, 2020, has accrued a $9 million liability for refunds of amounts collected under the higher ROE during the periods covered by both complaints. Legal Matters MidAmerican Energy is party to a variety of legal actions arising out of the normal course of business. Plaintiffs occasionally seek punitive or exemplary damages. MidAmerican Energy does not believe that such normal and routine litigation will have a material impact on its financial results.
MidAmerican Funding, LLC and Subsidiaries [Member]
Contractual Obligation [Line Items]
Commitments and Contingencies	Refer to Note 13 of MidAmerican Energy's Notes to Financial Statements. Legal Matters MidAmerican Funding is party to a variety of legal actions arising out of the normal course of business. Plaintiffs occasionally seek punitive or exemplary damages. MidAmerican Funding does not believe that such normal and routine litigation will have a material impact on its consolidated financial results.
Nevada Power Company [Member]
Contractual Obligation [Line Items]
Commitments and Contingencies	Commitments and Contingencies Environmental Laws and Regulations Nevada Power is subject to federal, state and local laws and regulations regarding air and water quality, renewable portfolio standards, emissions performance standards, climate change, coal combustion byproduct disposal, hazardous and solid waste disposal, protected species and other environmental matters that have the potential to impact Nevada Power's current and future operations. Nevada Power believes it is in material compliance with all applicable laws and regulations. Senate Bill 123 In June 2013, the Nevada State Legislature passed Senate Bill 123 ("SB 123"), which included the retirement of coal plants and replacing the capacity with renewable facilities and other generating facilities. In May 2014, Nevada Power filed its ERCR Plan in compliance with SB 123. In July 2015, Nevada Power filed an amendment to its ERCR Plan with the PUCN which was approved in September 2015. In June 2015, the Nevada State Legislature passed Assembly Bill No. 498, which modified the capacity replacement components of SB 123. In compliance with Senate Bill No. 123, Nevada Power retired 255 MWs of coal-fueled generation in 2019 in addition to the 557 MWs of coal-fueled generation retired in 2017.Consistent with the Emissions Reduction and Capacity Replacement Plan ("ERCR Plan"), between 2014 and 2016, Nevada Power acquired 536 MWs of natural gas generating resources, executed long-term power purchase agreements for 200 MWs of nameplate renewable energy capacity and constructed a 15-MW solar photovoltaic facility. Nevada Power has the option to acquire 35 MWs of nameplate renewable energy capacity in the future under the ERCR Plan, subject to PUCN approval. Legal Matters Nevada Power is party to a variety of legal actions arising out of the normal course of business. Plaintiffs occasionally seek punitive or exemplary damages. Nevada Power does not believe that such normal and routine litigation will have a material impact on its consolidated financial results. Nevada Power is also involved in other kinds of legal actions, some of which assert or may assert claims or seek to impose fines, penalties and other costs in substantial amounts. Commitments Nevada Power has the following firm commitments that are not reflected on the Consolidated Balance Sheet. Minimum payments as of December 31, 2020 are as follows (in millions): 2021 2022 2023 2024 2025 2026 and Thereafter Total Contract type: Fuel, capacity and transmission contract commitments $ 570 $ 409 $ 328 $ 328 $ 331 $ 3,197 $ 5,163 Fuel and capacity contract commitments (not commercially operable) — 35 74 197 229 4,965 5,500 Construction commitments 72 85 146 — — — 303 Easements 4 5 5 2 2 43 61 Maintenance, service and other contracts 48 44 32 23 12 6 165 Total commitments $ 694 $ 578 $ 585 $ 550 $ 574 $ 8,211 $ 11,192 Fuel and Capacity Contract Commitments Purchased Power Nevada Power has several contracts for long-term purchase of electric energy which have been approved by the PUCN. The expiration of these contracts range from 2026 to 2067. Purchased power includes estimated payments for contracts which meet the definition of a lease and payments are based on the amount of energy expected to be generated. See Note 5 for further discussion of Nevada Power's lease commitments. Natural Gas Nevada Power's gas transportation contracts expire from 2022 to 2032 and the gas supply contracts expires from 2021 to 2022. Fuel and Capacity Contract Commitments - Not Commercially Operable Nevada Power has several contracts for long-term purchase of electric energy in which the facility remains under development. Amounts represent the estimated payments under renewable energy power purchase contracts, which have been approved by the PUCN and are contingent upon the developers obtaining commercial operation and their ability to deliver power. Construction Commitments Nevada Power's construction commitments included in the table above relate to firm commitments and include costs associated with the planned Dry Lake generating facility, a 150 MW solar photovoltaic facility with an additional 100 MW capacity of co-located battery storage that will be developed in Clark County, Nevada and certain other generating plant projects. Easements Nevada Power has non-cancelable easements for land. Operations and maintenance expense on non-cancelable easements totaled $4 million, $7 million and $4 million for the years ended December 31, 2020, 2019 and 2018, respectively. Maintenance, Service and Other Contracts Nevada Power has long-term service agreements for the performance of maintenance on generation units. Obligation amounts are based on estimated usage. The estimated expiration of these service agreements range from 2022 to 2027.
Sierra Pacific Power Company [Member]
Contractual Obligation [Line Items]
Commitments and Contingencies	Commitments and Contingencies Environmental Laws and Regulations Sierra Pacific is subject to federal, state and local laws and regulations regarding air and water quality, renewable portfolio standards, emissions performance standards, climate change, coal combustion byproduct disposal, hazardous and solid waste disposal, protected species and other environmental matters that have the potential to impact Sierra Pacific's current and future operations. Sierra Pacific believes it is in material compliance with all applicable laws and regulations. Legal Matters Sierra Pacific is party to a variety of legal actions arising out of the normal course of business. Plaintiffs occasionally seek punitive or exemplary damages. Sierra Pacific does not believe that such normal and routine litigation will have a material impact on its financial results. Sierra Pacific is also involved in other kinds of legal actions, some of which assert or may assert claims or seek to impose fines, penalties and other costs in substantial amounts. Commitments Sierra Pacific has the following firm commitments that are not reflected on the Balance Sheet. Minimum payments as of December 31, 2020 are as follows (in millions): 2026 and 2021 2022 2023 2024 2025 Thereafter Total Contract type: Fuel, capacity and transmission contract commitments $ 327 $ 186 $ 98 $ 95 $ 96 $ 940 $ 1,742 Fuel and capacity contract commitments (not commercially operable) 6 35 36 36 36 637 786 Easements 2 2 2 2 2 30 40 Maintenance, service and other contracts 9 7 2 1 1 — 20 Total commitments $ 344 $ 230 $ 138 $ 134 $ 135 $ 1,607 $ 2,588 Fuel and Capacity Contract Commitments Purchased Power Sierra Pacific has several contracts for long-term purchase of electric energy which have been approved by the PUCN. The expiration of these contracts range from 2022 to 2045. Purchased power includes estimated payments for contracts which meet the definition of a lease and payments are based on the amount of energy expected to be generated. See Note 5 for further discussion of Sierra Pacific's lease commitments. Coal and Natural Gas Sierra Pacific has a long-term contract for the transport of coal that expires in 2021. Additionally, gas transportation contracts expire from 2022 to 2046 and the gas supply contracts expire from 2021 to 2022. Fuel and Capacity Contract Commitments - Not Commercially Operable Sierra Pacific has several contracts for long-term purchase of electric energy in which the facility remains under development. Amounts represent the estimated payments under renewable energy power purchase contracts, which have been approved by the PUCN and are contingent upon the developers obtaining commercial operation and their ability to deliver power. Easements Sierra Pacific has non-cancelable easements for land. Operating and maintenance expense on non-cancelable easements totaled $2 million for the years-ended December 31, 2020, 2019 and 2018. Maintenance, Service and Other Contracts Sierra Pacific has long-term service agreements for the performance of maintenance on generation units. Obligation amounts are based on estimated usage. The estimated expiration of these service agreements range from 2023 to 2025.
Eastern Energy Gas Holdings, LLC [Member]
Contractual Obligation [Line Items]
Commitments and Contingencies	Commitments and Contingencies Environmental Laws and Regulations Eastern Energy Gas is subject to federal, state and local laws and regulations regarding climate change, renewable portfolio standards, air and water quality, emissions performance standards, hazardous and solid waste disposal, protected species and other environmental matters that have the potential to impact Eastern Energy Gas' current and future operations. Eastern Energy Gas believes it is in material compliance with all applicable laws and regulations. Air Revisions to Ozone National Ambient Air Quality Ozone Standards The Clean Air Act includes National Ambient Air Quality Standards ("NAAQS"). States adopt rules that ensure their air quality meets the NAAQS. In October 2015, the United States Environmental Protection Agency ("EPA") published a rule lowering the ground level ozone NAAQS for non-attainment designations. States have until August 2021 to develop plans to address the new standard. Until the states have developed implementation plans for the standard, Eastern Energy Gas is unable to predict whether or to what extent the new rules will ultimately require additional controls. The expenditures required to implement additional controls could have a material impact on Eastern Energy Gas' results of operations and cash flows. Oil and Gas New Source Performance Standards In August 2020, the EPA issued two final amendments related to the reconsideration of the New Source Performance Standard ("NSPS") for the oil and natural gas sector applicable to volatile organic compound and methane emissions. Together, the two amendments have the effect of rescinding the methane portion of the NSPS for all segments of the oil and natural gas sector, rescinding all NSPS for the transmission and storage segment and modifying some of the NSPS volatile organic compound requirements for facilities in the production and processing segments. The two amendments have been challenged in the United States Court of Appeals for the District of Columbia Circuit but remain in effect pending the outcome of the litigation. Eastern Energy Gas is still evaluating whether potential impacts on results of operations, financial condition and/or cash flows related to this matter will be material. Carbon Regulations In August 2016, the EPA issued a draft rule proposing to reaffirm that a source's obligation to obtain a prevention of significant deterioration or Title V permit for greenhouse gases ("GHG") is triggered only if such permitting requirements are first triggered by non-GHG, or conventional, pollutants that are regulated by the New Source Review program, and to set a significant emissions rate at 75,000 tons per year of carbon dioxide equivalent emissions under which a source would not be required to apply best available control technology for its GHG emissions. Until the EPA ultimately takes final action on this rulemaking, Eastern Energy Gas cannot predict the impact to its results of operations, financial condition and/or cash flows. Other Legal Matters Eastern Energy Gas is party to a variety of legal actions arising out of the normal course of business. Plaintiffs occasionally seek punitive or exemplary damages. Eastern Energy Gas does not believe that such normal and routine litigation will have a material impact on its consolidated financial results. Surety Bonds As of December 31, 2020, Eastern Energy Gas had purchased $22 million of surety bonds. Under the terms of surety bonds, BHE is obligated to indemnify the respective surety bond company for any amounts paid.

Preferred Stock (Notes)

Preferred Stock (Notes)	12 Months Ended
	Dec. 31, 2020
PacifiCorp [Member]
Class of Stock [Line Items]
Preferred Stock [Text Block]	PacifiCorp has 3,500 thousand shares of Serial Preferred Stock authorized at the stated value of $100 per share. PacifiCorp had 24 thousand shares of Serial Preferred Stock issued and outstanding as of December 31, 2020 and 2019. The outstanding preferred stock series are non-redeemable and have annual dividend rates of 6.00% and 7.00%. In the event of voluntary liquidation, all preferred stock is entitled to stated value or a specified preference amount per share plus accrued dividends. Upon involuntary liquidation, all preferred stock is entitled to stated value plus accrued dividends. Dividends on all preferred stock are cumulative. Holders also have the right to elect members to the PacifiCorp Board of Directors in the event dividends payable are in default in an amount equal to four full quarterly payments. PacifiCorp also has 16 million shares of No Par Serial Preferred Stock and 127 thousand shares of 5% Preferred Stock authorized, but no shares were issued or outstanding as of December 31, 2020 and 2019.

BHE Shareholders' Equity (Notes

BHE Shareholders' Equity (Notes)	12 Months Ended
	Dec. 31, 2020
Stockholders' Equity Note [Abstract]
BHE Shareholders' Equity [Text Block]	BHE Shareholders' Equity Preferred Stock In October 2020, BHE issued 3,750,000 shares of its Perpetual Preferred Stock (the "4% Perpetual Preferred Stock") for $3.75 billion to certain subsidiaries of Berkshire Hathaway Inc. The 4% Perpetual Preferred Stock has a liquidation preference of $1,000 per share and currently pays a 4.00% dividend per share on the liquidation preference. Dividends shall accrue and accumulate daily, be cumulative, compound semi-annually and, if declared, be payable in cash semi-annually in arrears on May 15 and November 15 of each year. If dividends are not declared and paid, any accumulating dividends shall continue to accumulate and compound. BHE may not make any dividends on shares of any other class or series of its capital stock (other than for dividends on shares of common stock payable in shares of common stock, unless the holders of the then outstanding 4% Perpetual Preferred Stock shall first receive, or simultaneously receive, a dividend in an amount at least equivalent to the amount accumulated and not previously paid. BHE may not declare or pay any dividends on shares of the 4% Perpetual Preferred Stock if such declaration or payment would constitute an event of default on BHE's senior indebtedness (as defined). BHE may, at its option, redeem the 4% Perpetual Preferred Stock in whole or in part at any time at a price per share equal to the liquidation preference. Common Stock On March 14, 2000, and as amended on December 7, 2005, BHE's shareholders entered into a Shareholder Agreement that provides specific rights to certain shareholders. One of these rights allows certain shareholders the ability to put their common shares to BHE at the then-current fair value dependent on certain circumstances controlled by BHE. Restricted Net Assets BHE has maximum debt-to-total capitalization percentage restrictions imposed by its senior unsecured credit facilities expiring in June 2022 which, in certain circumstances, limit BHE's ability to make cash dividends or distributions. As a result of this restriction, BHE has restricted net assets of $14.7 billion as of December 31, 2020. Certain of BHE's subsidiaries have restrictions on their ability to dividend, loan or advance funds to BHE due to specific legal or regulatory restrictions, including, but not limited to, maximum debt-to-total capitalization percentages and commitments made to state commissions. As a result of these restrictions, BHE's subsidiaries had restricted net assets of $18.1 billion as of December 31, 2020.

Common Shareholder's Equity (No

Common Shareholder's Equity (Notes)	12 Months Ended
	Dec. 31, 2020
Class of Stock [Line Items]
Common Shareholder's Equity [Text Block]	BHE Shareholders' Equity Preferred Stock In October 2020, BHE issued 3,750,000 shares of its Perpetual Preferred Stock (the "4% Perpetual Preferred Stock") for $3.75 billion to certain subsidiaries of Berkshire Hathaway Inc. The 4% Perpetual Preferred Stock has a liquidation preference of $1,000 per share and currently pays a 4.00% dividend per share on the liquidation preference. Dividends shall accrue and accumulate daily, be cumulative, compound semi-annually and, if declared, be payable in cash semi-annually in arrears on May 15 and November 15 of each year. If dividends are not declared and paid, any accumulating dividends shall continue to accumulate and compound. BHE may not make any dividends on shares of any other class or series of its capital stock (other than for dividends on shares of common stock payable in shares of common stock, unless the holders of the then outstanding 4% Perpetual Preferred Stock shall first receive, or simultaneously receive, a dividend in an amount at least equivalent to the amount accumulated and not previously paid. BHE may not declare or pay any dividends on shares of the 4% Perpetual Preferred Stock if such declaration or payment would constitute an event of default on BHE's senior indebtedness (as defined). BHE may, at its option, redeem the 4% Perpetual Preferred Stock in whole or in part at any time at a price per share equal to the liquidation preference. Common Stock On March 14, 2000, and as amended on December 7, 2005, BHE's shareholders entered into a Shareholder Agreement that provides specific rights to certain shareholders. One of these rights allows certain shareholders the ability to put their common shares to BHE at the then-current fair value dependent on certain circumstances controlled by BHE. Restricted Net Assets BHE has maximum debt-to-total capitalization percentage restrictions imposed by its senior unsecured credit facilities expiring in June 2022 which, in certain circumstances, limit BHE's ability to make cash dividends or distributions. As a result of this restriction, BHE has restricted net assets of $14.7 billion as of December 31, 2020. Certain of BHE's subsidiaries have restrictions on their ability to dividend, loan or advance funds to BHE due to specific legal or regulatory restrictions, including, but not limited to, maximum debt-to-total capitalization percentages and commitments made to state commissions. As a result of these restrictions, BHE's subsidiaries had restricted net assets of $18.1 billion as of December 31, 2020.
PacifiCorp [Member]
Class of Stock [Line Items]
Common Shareholder's Equity [Text Block]	Common Shareholder's Equity Through PPW Holdings, BHE is the sole shareholder of PacifiCorp's common stock. The state regulatory orders that authorized BHE's acquisition of PacifiCorp contain restrictions on PacifiCorp's ability to pay dividends to the extent that they would reduce PacifiCorp's common equity below specified percentages of defined capitalization. As of December 31, 2020, the most restrictive of these commitments prohibits PacifiCorp from making any distribution to PPW Holdings or BHE without prior state regulatory approval to the extent that it would reduce PacifiCorp's common equity below 44% of its total capitalization, excluding short-term debt and current maturities of long-term debt. As of December 31, 2020, PacifiCorp's actual common equity percentage, as calculated under this measure, was 53%, and PacifiCorp would have been permitted to dividend $2.7 billion under this commitment. These commitments also restrict PacifiCorp from making any distributions to either PPW Holdings or BHE if PacifiCorp's senior unsecured debt rating is BBB- or lower by Standard & Poor's Rating Services or Fitch Ratings, or Baa3 or lower by Moody's Investor Service, as indicated by two of the three rating services. As of December 31, 2020, PacifiCorp met the minimum required senior unsecured debt ratings for making distributions. PacifiCorp is also subject to a maximum debt-to-total capitalization percentage under various financing agreements as further discussed in Note 7.

Components of Accumulated Other

Components of Accumulated Other Comprehensive Loss, Net (Notes)	12 Months Ended
	Dec. 31, 2020
Schedule of accumulated other comprehensive income (loss)
Comprehensive Income (Loss)	Components of Accumulated Other Comprehensive Loss, Net The following table shows the change in accumulated other comprehensive loss attributable to BHE shareholders by each component of other comprehensive income (loss), net of applicable income taxes, for the year ended December 31 (in millions): Unrecognized Foreign Unrealized Unrealized AOCI Amounts on Currency Gains on Gains (Losses) Attributable Retirement Translation Marketable on Cash Flow To BHE Benefits Adjustment Securities Hedges Shareholders, Net Balance, December 31, 2017 $ (383) $ (1,129) $ 1,085 $ 29 $ (398) Adoption of ASU 2016-01 — — (1,085) — (1,085) Other comprehensive income (loss) 25 (494) — 7 (462) Balance, December 31, 2018 (358) (1,623) — 36 (1,945) Other comprehensive (loss) income (59) 327 — (29) 239 Balance, December 31, 2019 (417) (1,296) — 7 (1,706) Other comprehensive (loss) income (65) 233 — (15) 153 Balance, December 31, 2020 $ (482) $ (1,063) $ — $ (8) $ (1,553) Reclassifications from AOCI to net income for the years ended December 31, 2020, 2019 and 2018 were insignificant. Additionally, refer to the "Foreign Operations" discussion in Note 13 for information about unrecognized amounts on retirement benefits reclassifications from AOCI that do not impact net income in their entirety.
PacifiCorp [Member]
Schedule of accumulated other comprehensive income (loss)
Comprehensive Income (Loss)	Accumulated other comprehensive loss, net consists of unrecognized amounts on retirement benefits, net of tax, of $19 million and $16 million as of December 31, 2020 and 2019, respectively.
Eastern Energy Gas Holdings, LLC [Member]
Schedule of accumulated other comprehensive income (loss)
Comprehensive Income (Loss)	Components of Accumulated Other Comprehensive Loss, Net The following table shows the change in accumulated other comprehensive loss by each component of other comprehensive income (loss), net of applicable income taxes, for the year ended December 31 (in millions): Unrecognized Unrealized Accumulated Amounts On Losses On Other Retirement Cash Flow Noncontrolling Comprehensive Benefits Hedges Interests Loss Balance, December 31, 2017 $ (75) $ (23) $ — $ (98) Other comprehensive (loss) income (69) (2) — (71) Balance, December 31, 2018 (144) (25) — (169) Other comprehensive income (loss) 38 (56) — (18) Balance, December 31, 2019 (106) (81) — (187) Other comprehensive income 94 30 10 134 Balance, December 31, 2020 $ (12) $ (51) $ 10 $ (53) The following table shows the reclassifications from AOCI to net income for the year ended December 31 (in millions): Affected Line Item In The Amounts Consolidated Reclassified Statements of From AOCI Operations 2020 Deferred (gains) and losses on derivatives-hedging activities: Interest rate contracts $ 157 Interest expense Foreign currency contracts (25) Other, net Total 132 Tax (34) Income tax (benefit) expense Total, net of tax $ 98 Unrecognized pension costs: Actuarial losses $ 6 Other, net Total 6 Tax (2) Income tax (benefit) expense Total, net of tax $ 4 2019 Deferred (gains) and losses on derivatives-hedging activities: Commodity contracts $ (4) Net income from discontinued operations Interest rate contracts 5 Interest expense Foreign currency contracts 6 Other, net Total 7 Tax (2) Income tax (benefit) expense Total, net of tax $ 5 Unrecognized pension costs: Actuarial losses $ 7 Other, net Total 7 Tax (2) Income tax (benefit) expense Total, net of tax $ 5 2018 Deferred (gains) and losses on derivatives-hedging activities: Commodity contracts $ 8 Net income from discontinued operations Interest rate contracts 5 Interest expense Foreign currency contracts 13 Other, net Total 26 Tax (7) Income tax (benefit) expense Total, net of tax $ 19 Unrecognized pension costs: Actuarial losses $ 6 Other, net Total 6 Tax (2) Income tax (benefit) expense Total, net of tax $ 4

Variable-Interest Entities (Not

Variable-Interest Entities (Notes)	12 Months Ended
	Dec. 31, 2020
PacifiCorp [Member]
Schedule of Equity Method Investments [Line Items]
Variable Interest Entity Disclosure [Text Block]	Variable-Interest Entities PacifiCorp holds a 66.67% interest in Bridger Coal Company ("Bridger Coal"), which supplies coal to the Jim Bridger generating facility that is owned 66.67% by PacifiCorp and 33.33% by PacifiCorp's joint venture partner in Bridger Coal. PacifiCorp purchases 66.67% of the coal produced by Bridger Coal, while the remaining 33.33% of the coal produced is purchased by the joint venture partner. The power to direct the activities that most significantly impact Bridger Coal's economic performance are shared with the joint venture partner. Each joint venture partner is jointly and severally liable for the obligations of Bridger Coal. Bridger Coal's necessary working capital to carry out its mining operations is financed by contributions from PacifiCorp and its joint venture partner. PacifiCorp's equity investment in Bridger Coal was $74 million and $81 million as of December 31, 2020 and 2019, respectively. Refer to Note 21 for information regarding related-party transactions with Bridger Coal.
Eastern Energy Gas Holdings, LLC [Member]
Schedule of Equity Method Investments [Line Items]
Variable Interest Entity Disclosure [Text Block]	Variable Interest Entities The primary beneficiary of a variable interest entity ("VIE") is required to consolidate the VIE and to disclose certain information about its significant variable interests in the VIE. The primary beneficiary of a VIE is the entity that has both 1) the power to direct the activities that most significantly impact the entity's economic performance and 2) the obligation to absorb losses or receive benefits from the entity that could potentially be significant to the VIE. As part of the Dominion Energy Gas Restructuring, DEI contributed to Eastern Energy Gas a 75% controlling limited partner interest in Cove Point. In December 2019, DEI sold its retained 25% noncontrolling limited partner interest in Cove Point. As discussed in Note 3, as part of the GT&S Transaction, Eastern Energy Gas finalized a restructuring which included the disposition of a 50% noncontrolling interest in Cove Point to DEI, which resulted in Eastern Energy Gas owning 100% of the general partner interest and 25% of the limited partnership interest in Cove Point. Eastern Energy Gas concluded that Cove Point is a VIE due to the limited partners lacking the characteristics of a controlling financial interest. Eastern Energy Gas is the primary beneficiary of Cove Point as it has the power to direct the activities that most significantly impact its economic performance as well as the obligation to absorb losses and benefits which could be significant to it. Eastern Energy Gas purchased shared services from Carolina Gas Services, Inc. ("Carolina Gas Services") an affiliated VIE, of $12 million, $16 million and $16 million for the years ended December 31, 2020, 2019 and 2018, respectively. Eastern Energy Gas' Consolidated Balance Sheets included amounts due to Carolina Gas Services of $22 million and $9 million as of December 31, 2020 and 2019 respectively. Eastern Energy Gas determined that neither it nor any of its consolidated entities is the primary beneficiary of Carolina Gas Services as neither it nor any of its consolidated entities has both the power to direct the activities that most significantly impact its economic performance as well as the obligation to absorb losses and benefits which could be significant to them. Carolina Gas Services provides marketing and operational services. Neither Eastern Energy Gas nor any of its consolidated entities has any obligation to absorb more than its allocated share of Carolina Gas Services costs. Prior to the GT&S Transaction, Eastern Energy Gas purchased shared services from Dominion Energy Questar Pipeline Services, Inc. ("DEQPS"), an affiliated VIE, of $23 million, $33 million and $29 million for the years ended December 31, 2020, 2019 and 2018, respectively. Eastern Energy Gas' Consolidated Balance Sheet included amounts due to DEQPS of $6 million as of December 31, 2019. Eastern Energy Gas determined that neither it nor any of its consolidated entities was the primary beneficiary of DEQPS, as neither it nor any of its consolidated entities has both the power to direct the activities that most significantly impact their economic performance as well as the obligation to absorb losses and benefits which could be significant to them. DEQPS provided marketing and operational services. Neither Eastern Energy Gas nor any of its consolidated entities had any obligation to absorb more than its allocated share of DEQPS costs. Prior to the GT&S Transaction, Eastern Energy Gas purchased shared services from Dominion Energy Services, Inc. ("DES"), an affiliated VIE, of $90 million, $119 million and $106 million for the years ended December 31, 2020, 2019 and 2018, respectively. Eastern Energy Gas' Consolidated Balance Sheets included amounts due to DES of $27 million as of December 31, 2019. Eastern Energy Gas determined that neither it nor any of its consolidated entities was the primary beneficiary of DES as neither it nor any of its consolidated entities had both the power to direct the activities that most significantly impact their economic performance as well as the obligation to absorb losses and benefits which could be significant to them. DES provided accounting, legal, finance and certain administrative and technical services. Neither Eastern Energy Gas nor any of its consolidated entities had any obligation to absorb more than its allocated share of DES costs.

Noncontrolling Interests (Notes

Noncontrolling Interests (Notes)	12 Months Ended
	Dec. 31, 2020
Noncontrolling Interest [Line Items]
Variable Interest Entity and Noncontrolling Interest Disclosure	Variable Interest Entities and Noncontrolling Interests The primary beneficiary of a VIE is required to consolidate the VIE and to disclose certain information about its significant variable interests in the VIE. The primary beneficiary of a VIE is the entity that has both (i) the power to direct the activities that most significantly impact the entity's economic performance and (ii) the obligation to absorb losses or receive benefits from the entity that could potentially be significant to the VIE. As part of the GT&S Transaction, BHE acquired an indirect 25% economic interest in Cove Point, consisting of 100% of the general partnership interest and 25% of the total limited partnership interests. BHE concluded that Cove Point is a VIE due to the limited partners lacking the characteristics of a controlling financial interest. BHE is the primary beneficiary of Cove Point as it has the power to direct the activities that most significantly impact its economic performance as well as the obligation to absorb losses and benefits which could be significant to it. Included in noncontrolling interests on the Consolidated Balance Sheets are (i) Dominion Energy's 50% interest in Cove Point and Brookfield Super-Core Infrastructure Partner's 25% interest in Cove Point and (ii) preferred securities of subsidiaries of $58 million as of December 31, 2020 and 2019, consisting of $56 million of 8.061% cumulative preferred securities of Northern Electric plc, a subsidiary of Northern Powergrid, which are redeemable in the event of the revocation of Northern Electric plc's electricity distribution license by the Secretary of State, and $2 million of nonredeemable preferred stock of PacifiCorp.
MidAmerican Funding, LLC and Subsidiaries [Member]
Noncontrolling Interest [Line Items]
Other, Net [Text Block]	Other, net, as shown on the Consolidated Statements of Operations, includes the following other income (expense) items for the years ended December 31 (in millions): 2020 2019 2018 Non-service cost components of postretirement employee benefit plans $ 24 $ 17 $ 21 Corporate-owned life insurance income 16 24 6 Gains on disposition of assets 6 — — Interest income and other, net 6 11 4 Total $ 52 $ 52 $ 31
Eastern Energy Gas Holdings, LLC [Member]
Noncontrolling Interest [Line Items]
Noncontrolling Interests [Text Block]	Noncontrolling Interests Included in noncontrolling interests in the Consolidated Financial Statements are DEI's 50% interest in Cove Point (effective November 2020), Brookfield's 25% interest in Cove Point (effective December 2019) and the public's ownership interest in Northeast Midstream (through January 2019). Noncontrolling Interest in Northeast Midstream Northeast Midstream was a publicly traded master limited partnership that included common units, subordinated units, Series A Preferred Units and incentive distribution rights as its participating securities. In accordance with the partnership agreement, when the subordination period ended, all subordinated units converted into common units on a one-for-one basis and participated pro rata with the other common units in distributions. In May 2018, all of the subordinated units of Northeast Midstream held by DEI were converted into common units on a 1:1 ratio following the payment of Northeast Midstream's distribution for the first quarter of 2018. In June 2018, DEI, as general partner, exercised an incentive distribution right reset as defined in Northeast Midstream's partnership agreement and received 27 million common units representing limited partner interests in Northeast Midstream. As a result of the increase in its ownership interest in Northeast Midstream, DEI recorded a decrease in noncontrolling interest, and a corresponding increase in shareholders' equity, of $375 million reflecting the change in the carrying value of the interest in the net assets of Northeast Midstream held by others. In January 2019, DEI and Northeast Midstream closed on an agreement and plan of merger pursuant to which DEI acquired each outstanding common unit representing limited partner interests in Northeast Midstream not already owned by DEI through the issuance of 22.5 million shares of common stock valued at $1.6 billion. Under the terms of the agreement and plan of merger, each publicly held outstanding common unit representing limited partner interests in Northeast Midstream was converted into the right to receive 0.2492 shares of DEI common stock. Immediately prior to the closing, each Series A Preferred Unit representing limited partner interests in Northeast Midstream was converted into common units representing limited partner interests in Northeast Midstream in accordance with the terms of Northeast Midstream's partnership agreement. The merger was accounted for by DEI following the guidance for a change in a parent company's ownership interest in a consolidated subsidiary. Because DEI controlled Northeast Midstream both before and after the merger, the changes in DEI's ownership interest in Northeast Midstream were accounted for as an equity transaction and no gain or loss was recognized. In connection with the merger, DEI recognized $40 million of income taxes in equity primarily attributable to establishing additional regulatory liabilities related to excess deferred income taxes and changes in state income taxes. Subsequent to this activity, as a result of the Dominion Energy Gas Restructuring, Eastern Energy Gas is considered to have acquired all of the outstanding partnership interests of Northeast Midstream and Northeast Midstream became a wholly-owned subsidiary of Eastern Energy Gas.

Segment Information (Notes)

Segment Information (Notes)	12 Months Ended
	Dec. 31, 2020
Segment Reporting Information [Line Items]
Segment Information [Text Block]	Segment Information The Company's reportable segments with foreign operations include Northern Powergrid, whose business is principally in the United Kingdom, BHE Transmission, whose business includes operations in Canada, and BHE Renewables, whose business includes operations in the Philippines. Intersegment eliminations and adjustments, including the allocation of goodwill, have been made. Information related to the Company's reportable segments is shown below (in millions): Years Ended December 31, 2020 2019 2018 Operating revenue: PacifiCorp $ 5,341 $ 5,068 $ 5,026 MidAmerican Funding 2,728 2,927 3,053 NV Energy 2,854 3,037 3,039 Northern Powergrid 1,022 1,013 1,020 BHE Pipeline Group 1,578 1,131 1,203 BHE Transmission 659 707 710 BHE Renewables 936 932 908 HomeServices 5,396 4,473 4,214 BHE and Other (1) 438 556 614 Total operating revenue $ 20,952 $ 19,844 $ 19,787 Depreciation and amortization: PacifiCorp $ 1,209 $ 954 $ 979 MidAmerican Funding 716 638 609 NV Energy 502 482 456 Northern Powergrid 266 254 250 BHE Pipeline Group 231 115 126 BHE Transmission 201 240 247 BHE Renewables 284 282 268 HomeServices 45 47 51 BHE and Other (1) 1 (1) (2) Total depreciation and amortization $ 3,455 $ 3,011 $ 2,984 Operating income: PacifiCorp $ 924 $ 1,072 $ 1,051 MidAmerican Funding 454 549 550 NV Energy 649 655 607 Northern Powergrid 421 472 486 BHE Pipeline Group 779 572 525 BHE Transmission 316 323 313 BHE Renewables 291 336 325 HomeServices 511 222 214 BHE and Other (1) (54) (51) 1 Total operating income 4,291 4,150 4,072 Interest expense (2,021) (1,912) (1,838) Capitalized interest 80 77 61 Allowance for equity funds 165 173 104 Interest and dividend income 71 117 113 Gains (losses) on marketable securities, net 4,797 (288) (538) Other, net 88 97 (9) Total income before income tax expense (benefit) and equity (loss) income $ 7,471 $ 2,414 $ 1,965 Years Ended December 31, 2020 2019 2018 Interest expense: PacifiCorp $ 426 $ 401 $ 384 MidAmerican Funding 322 302 247 NV Energy 227 229 224 Northern Powergrid 130 139 141 BHE Pipeline Group 74 52 43 BHE Transmission 148 157 167 BHE Renewables 166 174 201 HomeServices 11 25 23 BHE and Other (1) 517 433 408 Total interest expense $ 2,021 $ 1,912 $ 1,838 Income tax expense (benefit): PacifiCorp $ (75) $ 61 $ 5 MidAmerican Funding (574) (377) (262) NV Energy 61 98 100 Northern Powergrid 96 59 61 BHE Pipeline Group 162 138 119 BHE Transmission 13 11 7 BHE Renewables (2) (602) (325) (158) HomeServices 138 51 52 BHE and Other (1) 1,089 (314) (507) Total income tax expense (benefit) $ 308 $ (598) $ (583) Net income attributable to BHE shareholders: PacifiCorp $ 741 $ 773 $ 739 MidAmerican Funding 818 781 669 NV Energy 410 365 317 Northern Powergrid 201 256 239 BHE Pipeline Group 528 422 387 BHE Transmission 231 229 210 BHE Renewables (2) 521 431 329 HomeServices 375 160 145 BHE and Other 3,118 (467) (467) Total net income attributable to BHE shareholders $ 6,943 $ 2,950 $ 2,568 Capital expenditures: PacifiCorp $ 2,540 $ 2,175 $ 1,257 MidAmerican Funding 1,836 2,810 2,332 NV Energy 675 657 503 Northern Powergrid 682 602 566 BHE Pipeline Group 659 687 427 BHE Transmission 372 247 270 BHE Renewables 95 122 817 HomeServices 36 54 47 BHE and Other (130) 10 22 Total capital expenditures $ 6,765 $ 7,364 $ 6,241 As of December 31, 2020 2019 2018 Property, plant and equipment, net: PacifiCorp $ 22,430 $ 20,973 $ 19,570 MidAmerican Funding 19,279 18,377 16,169 NV Energy 9,865 9,613 9,367 Northern Powergrid 7,230 6,606 6,007 BHE Pipeline Group 15,097 5,482 4,904 BHE Transmission 6,445 6,157 5,824 BHE Renewables 5,645 5,976 6,155 HomeServices 159 161 141 BHE and Other (22) (40) (50) Total property, plant and equipment, net $ 86,128 $ 73,305 $ 68,087 Total assets: PacifiCorp $ 26,862 $ 24,861 $ 23,478 MidAmerican Funding 23,530 22,664 20,029 NV Energy 14,501 14,128 14,119 Northern Powergrid 8,782 8,385 7,427 BHE Pipeline Group 19,541 6,100 5,511 BHE Transmission 9,208 8,776 8,424 BHE Renewables 12,004 9,961 8,666 HomeServices 4,955 3,846 2,797 BHE and Other 7,933 1,330 1,738 Total assets $ 127,316 $ 100,051 $ 92,189 Years Ended December 31, 2020 2019 2018 Operating revenue by country: United States $ 19,254 $ 18,108 $ 18,014 United Kingdom 1,022 1,011 1,017 Canada 653 706 710 Philippines and other 23 19 46 Total operating revenue by country $ 20,952 $ 19,844 $ 19,787 Income before income tax expense (benefit) and equity (loss) income by country: United States $ 6,954 $ 1,866 $ 1,425 United Kingdom 338 326 307 Canada 173 178 155 Philippines and other 6 44 78 Total income before income tax expense (benefit) and equity (loss) income by country: $ 7,471 $ 2,414 $ 1,965 As of December 31, 2020 2019 2018 Property, plant and equipment, net by country: United States $ 72,583 $ 60,634 $ 56,362 United Kingdom 7,134 6,504 5,895 Canada 6,401 6,157 5,817 Philippines and other 10 10 13 Total property, plant and equipment, net by country $ 86,128 $ 73,305 $ 68,087 (1) The differences between the reportable segment amounts and the consolidated amounts, described as BHE and Other, relate to other corporate entities, including MidAmerican Energy Services, LLC, corporate functions and intersegment eliminations. (2) Income tax expense (benefit) includes the tax attributes of disregarded entities that are not required to pay income taxes and the earnings of which are taxable directly to BHE. The following table shows the change in the carrying amount of goodwill by reportable segment for the years ended December 31, 2020 and 2019 (in millions): BHE BHE MidAmerican NV Northern Pipeline BHE BHE Home- and PacifiCorp Funding Energy Powergrid Group Transmission Renewables Services Other Total December 31, 2018 $ 1,129 $ 2,102 $ 2,369 $ 952 $ 73 $ 1,448 $ 95 $ 1,427 $ — $ 9,595 Acquisitions — — — — — — — 29 — 29 Foreign currency translation — — — 26 — 72 — — — 98 December 31, 2019 1,129 2,102 2,369 978 73 1,520 95 1,456 — 9,722 Acquisitions — — — — 1,730 — — 1 — 1,731 Foreign currency translation — — — 22 — 31 — — — 53 December 31, 2020 $ 1,129 $ 2,102 $ 2,369 $ 1,000 $ 1,803 $ 1,551 $ 95 $ 1,457 $ — $ 11,506
MidAmerican Energy Company [Member]
Segment Reporting Information [Line Items]
Segment Information [Text Block]	MidAmerican Energy has identified two reportable operating segments: regulated electric and regulated natural gas. The regulated electric segment derives most of its revenue from regulated retail sales of electricity to residential, commercial, and industrial customers and from wholesale sales. The regulated natural gas segment derives most of its revenue from regulated retail sales of natural gas to residential, commercial, and industrial customers and also obtains revenue by transporting natural gas owned by others through its distribution system. Pricing for regulated electric and regulated natural gas sales are established separately by regulatory agencies; therefore, management also reviews each segment separately to make decisions regarding allocation of resources and in evaluating performance. Common operating costs, interest income, interest expense and income tax expense are allocated to each segment based on certain factors, which primarily relate to the nature of the cost. Refer to Note 9 for a discussion of items affecting income tax (benefit) expense for the regulated electric and natural gas operating segments. The following tables provide information on a reportable segment basis (in millions): Years Ended December 31, 2020 2019 2018 Operating revenue: Regulated electric $ 2,139 $ 2,237 $ 2,283 Regulated natural gas 573 660 754 Other 8 28 12 Total operating revenue $ 2,720 $ 2,925 $ 3,049 Depreciation and amortization: Regulated electric $ 667 $ 593 $ 565 Regulated natural gas 49 46 44 Total depreciation and amortization $ 716 $ 639 $ 609 Operating income: Regulated electric $ 384 $ 473 $ 469 Regulated natural gas 64 71 81 Other — 4 1 Total operating income $ 448 $ 548 $ 551 Interest expense: Regulated electric $ 281 $ 259 $ 208 Regulated natural gas 23 22 19 Total interest expense $ 304 $ 281 $ 227 Years Ended December 31, 2020 2019 2018 Income tax (benefit) expense: Regulated electric $ (584) $ (384) $ (273) Regulated natural gas 14 12 16 Other — 1 2 Total income tax (benefit) expense $ (570) $ (371) $ (255) Net income: Regulated electric $ 780 $ 739 $ 628 Regulated natural gas 45 52 54 Other 1 2 — Net income $ 826 $ 793 $ 682 Capital expenditures: Regulated electric $ 1,704 $ 2,684 $ 2,223 Regulated natural gas 132 126 109 Total capital expenditures $ 1,836 $ 2,810 $ 2,332 As of December 31, 2020 2019 2018 Total assets: Regulated electric $ 19,892 $ 19,093 $ 16,511 Regulated natural gas 1,544 1,468 1,406 Other 1 3 3 Total assets $ 21,437 $ 20,564 $ 17,920
MidAmerican Funding, LLC and Subsidiaries [Member]
Segment Reporting Information [Line Items]
Segment Information [Text Block]	MidAmerican Funding has identified two reportable operating segments: regulated electric and regulated natural gas. The regulated electric segment derives most of its revenue from regulated retail sales of electricity to residential, commercial, and industrial customers and from wholesale sales. The regulated natural gas segment derives most of its revenue from regulated retail sales of natural gas to residential, commercial, and industrial customers and also obtains revenue by transporting natural gas owned by others through its distribution system. Pricing for regulated electric and regulated natural gas sales are established separately by regulatory agencies; therefore, management also reviews each segment separately to make decisions regarding allocation of resources and in evaluating performance. Common operating costs, interest income, interest expense and income tax expense are allocated to each segment based on certain factors, which primarily relate to the nature of the cost. "Other" in the tables below consists of the nonregulated subsidiaries of MidAmerican Funding not engaged in the energy business and parent company interest expense. Refer to Note 9 for a discussion of items affecting income tax (benefit) expense for the regulated electric and natural gas operating segments. The following tables provide information on a reportable segment basis (in millions): Years Ended December 31, 2020 2019 2018 Operating revenue: Regulated electric $ 2,139 $ 2,237 $ 2,283 Regulated natural gas 573 660 754 Other 16 30 16 Total operating revenue $ 2,728 $ 2,927 $ 3,053 Depreciation and amortization: Regulated electric $ 667 $ 593 $ 565 Regulated natural gas 49 46 44 Total depreciation and amortization $ 716 $ 639 $ 609 Operating income: Regulated electric $ 384 $ 473 $ 469 Regulated natural gas 64 71 81 Other 6 5 — Total operating income $ 454 $ 549 $ 550 Interest expense: Regulated electric $ 281 $ 259 $ 208 Regulated natural gas 23 22 19 Other 18 21 20 Total interest expense $ 322 $ 302 $ 247 Income tax (benefit) expense: Regulated electric $ (584) $ (384) $ (273) Regulated natural gas 14 12 16 Other (4) (5) (5) Total income tax (benefit) expense $ (574) $ (377) $ (262) Net income: Regulated electric $ 780 $ 739 $ 628 Regulated natural gas 45 52 54 Other (7) (10) (13) Net income $ 818 $ 781 $ 669 Years Ended December 31, 2020 2019 2018 Capital expenditures: Regulated electric $ 1,704 $ 2,684 $ 2,223 Regulated natural gas 132 126 109 Total capital expenditures $ 1,836 $ 2,810 $ 2,332 As of December 31, 2020 2019 2018 Total assets: Regulated electric $ 21,083 $ 20,284 $ 17,702 Regulated natural gas 1,623 1,547 1,485 Other 5 9 15 Total assets $ 22,711 $ 21,840 $ 19,202 Goodwill by reportable segment as of December 31, 2020 and 2019, was as follows (in millions): Regulated electric $ 1,191 Regulated natural gas 79 Total $ 1,270
Sierra Pacific Power Company [Member]
Segment Reporting Information [Line Items]
Segment Information [Text Block]	Segment Information Sierra Pacific has identified two reportable operating segments: regulated electric and regulated natural gas. The regulated electric segment derives most of its revenue from regulated retail sales of electricity to residential, commercial, and industrial customers and from wholesale sales. The regulated natural gas segment derives most of its revenue from regulated retail sales of natural gas to residential, commercial, and industrial customers and also obtains revenue by transporting natural gas owned by others through its distribution system. Pricing for regulated electric and regulated natural gas sales are established separately by the PUCN; therefore, management also reviews each segment separately to make decisions regarding allocation of resources and in evaluating performance. The following tables provide information on a reportable segment basis (in millions): Years Ended December 31, 2020 2019 2018 Operating revenue: Regulated electric $ 738 $ 770 $ 752 Regulated natural gas 116 119 103 Total operating revenue $ 854 $ 889 $ 855 Operating income: Regulated electric $ 147 $ 150 $ 136 Regulated natural gas 18 21 16 Total operating income 165 171 152 Interest expense (56) (48) (44) Allowance for borrowed funds 2 1 1 Allowance for equity funds 4 3 4 Other, net 11 4 9 Income before income tax expense $ 126 $ 131 $ 122 As of December 31, 2020 2019 2018 Assets Regulated electric $ 3,540 $ 3,319 $ 3,177 Regulated natural gas 342 308 314 Regulated common assets (1) 37 44 78 Total assets $ 3,919 $ 3,671 $ 3,569 (1) Consists principally of cash and cash equivalents not included in either the regulated electric or regulated natural gas segments.

Condensed Financial Statements

Condensed Financial Statements (Notes)	12 Months Ended
	Dec. 31, 2020
Condensed Financial Statements, Captions [Line Items]
Condensed Financial Statements [Text Block]	Schedule I As of December 31, 2020 2019 ASSETS Current assets: Cash and cash equivalents $ 623 $ 13 Accounts receivable - affiliate 96 87 Notes receivable - affiliate 177 181 Income tax receivable 19 3 Other current assets 1,301 8 Total current assets 2,216 292 Investments in subsidiaries 48,654 40,204 Other investments 6,103 1,300 Goodwill 1,221 1,221 Other assets 488 695 Total assets $ 58,682 $ 43,712 LIABILITIES AND EQUITY Current liabilities: Accounts payable and other current liabilities $ 341 $ 194 Notes payable - affiliate 200 240 Short-term debt — 1,590 Current portion of BHE senior debt 450 350 Total current liabilities 991 2,374 BHE senior debt 12,997 8,231 BHE junior subordinated debentures 100 100 Notes payable - affiliate 116 2 Other long-term liabilities 1,468 530 Total liabilities 15,672 11,237 Equity: BHE shareholders' equity: Preferred stock - 100 shares authorized, $0.01 par value, 4 shares issued and outstanding 3,750 — Common stock - 115 shares authorized, no par value, 76 and 77 shares issued and outstanding — — Additional paid-in capital 6,377 6,389 Long-term income tax receivable (658) (530) Retained earnings 35,093 28,296 Accumulated other comprehensive loss, net (1,552) (1,706) Total BHE shareholders' equity 43,010 32,449 Noncontrolling interest — 26 Total equity 43,010 32,475 Total liabilities and equity $ 58,682 $ 43,712 The accompanying notes are an integral part of this financial statement schedule. Schedule I BERKSHIRE HATHAWAY ENERGY COMPANY PARENT COMPANY ONLY CONDENSED STATEMENTS OF OPERATIONS (Amounts in millions) Years Ended December 31, 2020 2019 2018 Operating expenses: General and administration $ 57 $ 49 $ 21 Depreciation and amortization 4 5 4 Total operating expenses 61 54 25 Operating loss (61) (54) (25) Other income (expense): Interest expense (527) (452) (438) Other, net 4,789 (271) (537) Total other income (expense) 4,262 (723) (975) Income (loss) before income tax expense (benefit) and equity income 4,201 (777) (1,000) Income tax expense (benefit) 1,089 (312) (513) Equity income 3,832 3,419 3,058 Net income 6,944 2,954 2,571 Net income attributable to noncontrolling interest 1 3 3 Net income attributable to BHE shareholders $ 6,943 $ 2,951 $ 2,568 Preferred dividends 26 — — Earnings on common shares $ 6,917 $ 2,951 $ 2,568 The accompanying notes are an integral part of this financial statement schedule. Schedule I BERKSHIRE HATHAWAY ENERGY COMPANY PARENT COMPANY ONLY CONDENSED STATEMENTS OF COMPREHENSIVE INCOME (Amounts in millions) Years Ended December 31, 2020 2019 2018 Net income $ 6,944 $ 2,954 $ 2,571 Other comprehensive income (loss), net of tax 153 239 (462) Comprehensive income 7,097 3,193 2,109 Comprehensive income attributable to noncontrolling interests 1 3 3 Comprehensive income attributable to BHE shareholders $ 7,096 $ 3,190 $ 2,106 The accompanying notes are an integral part of this financial statement schedule. Schedule I BERKSHIRE HATHAWAY ENERGY COMPANY PARENT COMPANY ONLY CONDENSED STATEMENTS OF CASH FLOWS (In millions) Years Ended December 31, 2020 2019 2018 Cash flows from operating activities $ 1,639 $ 1,780 $ 1,885 Cash flows from investing activities: Investments in subsidiaries (6,422) (1,972) (1,791) Purchases of investments (1,345) (42) (44) Proceeds from sale of investments 22 42 45 Notes receivable from affiliate, net (121) (112) (72) Other, net (20) (5) (22) Net cash flows from investing activities (7,886) (2,089) (1,884) Cash flows from financing activities: Proceeds from BHE senior debt 5,212 — 3,166 Repayments of BHE senior debt (350) — (1,045) Proceeds from issuance of preferred stock 3,750 — — Common stock purchases (126) (293) (107) Net (repayments of) proceeds from short-term debt (1,590) 607 (2,348) Other, net (39) (1) (4) Net cash flows from financing activities 6,857 313 (338) Net change in cash and cash equivalents 610 4 (337) Cash and cash equivalents at beginning of year 13 9 346 Cash and cash equivalents at end of year $ 623 $ 13 $ 9 The accompanying notes are an integral part of this financial statement schedule. Schedule I BERKSHIRE HATHAWAY ENERGY COMPANY PARENT COMPANY ONLY NOTES TO CONDENSED FINANCIAL STATEMENTS Basis of Presentation - The condensed financial information of BHE investments in subsidiaries are presented under the equity method of accounting. Under this method, the assets and liabilities of subsidiaries are not consolidated. The investments in subsidiaries are recorded in the Condensed Balance Sheets. The income from operations of subsidiaries is reported on a net basis as equity income in the Condensed Statements of Operations. Other investments - BHE's investment in BYD Company Limited ("BYD") common stock is accounted for as a marketable security with changes in fair value recognized in net income. As of December 31, 2020 and 2019, the fair value of BHE's investment in BYD common stock was $5,897 million and $1,122 million. Dividends and distributions from subsidiaries - Cash dividends paid to BHE by its subsidiaries for the years ended December 31, 2020, 2019 and 2018 were $2.0 billion, $2.0 billion and $2.3 billion, respectively. In January and February 2021, BHE received cash dividends from its subsidiaries totaling $131 million. Guarantees and commitments - BHE has issued guarantees and letters of credit in respect of subsidiary and equity method investments aggregating $1.3 billion and commitments, subject to satisfaction of certain specified conditions, to provide equity contributions in support of renewable tax equity investments totaling $563 million. See the notes to the consolidated BHE financial statements in Part II, Item 8 for other disclosures regarding long-term obligations (Notes 9, 10 and 11) and shareholders' equity (Note 18).
MidAmerican Funding LLC [Member]
Condensed Financial Statements, Captions [Line Items]
Condensed Financial Statements [Text Block]	MIDAMERICAN FUNDING, LLC PARENT COMPANY ONLY NOTES TO CONDENSED FINANCIAL STATEMENTS Incorporated by reference are MidAmerican Funding, LLC and Subsidiaries Consolidated Statements of Changes in Equity for the three years ended December 31, 2020 in Part II, Item 8. Basis of Presentation - The condensed financial information of MidAmerican Funding, LLC's ("MidAmerican Funding's") investments in subsidiaries is presented under the equity method of accounting. Under this method, the assets and liabilities of subsidiaries are not consolidated. The investments in and advances to subsidiaries are recorded on the Condensed Balance Sheets. The income from operations of the subsidiaries is reported on a net basis as equity in undistributed earnings of subsidiary companies on the Condensed Statements of Operations. The Condensed Statements of Comprehensive Income have been omitted as net income equals comprehensive income for the years ended December 31, 2020, 2019 and 2018. Payable to Affiliate - MHC, Inc. ("MHC") settles all obligations of MidAmerican Funding including primarily interest costs on, and repayments of, MidAmerican Funding's long-term debt and income taxes. MHC paid $12 million and $12 million in 2020 and 2019, respectively, and received $2 million in 2018 on behalf of MidAmerican Funding. In 2019, MHC transferred to MidAmerican Funding $440 million of its receivable from MidAmerican Funding in the form of a dividend. Distribution to Parent - In 2019, MidAmerican Funding recorded a noncash dividend of $8 million for the transfer to BHE of corporate aircraft owned by MHC. See the notes to the consolidated MidAmerican Funding financial statements in Part II, Item 8 for other disclosures.

Schedule II Consolidated Valuat

Schedule II Consolidated Valuation and Qualifying Accounts (Notes)	12 Months Ended
	Dec. 31, 2020
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Consolidated Valuation and Qualifying Accounts [Text Block]	Schedule II BERKSHIRE HATHAWAY ENERGY COMPANY CONSOLIDATED VALUATION AND QUALIFYING ACCOUNTS FOR THE THREE YEARS ENDED DECEMBER 31, 2020 (Amounts in millions) Column B Column C Column E Balance at Charged Balance Column A Beginning to Acquisition Column D at End Description of Year Income Reserves Deductions of Year Reserves Deducted From Assets To Which They Apply: Reserve for uncollectible accounts receivable: Year ended 2020 $ 44 $ 56 $ 5 $ (28) $ 77 Year ended 2019 42 47 — (45) 44 Year ended 2018 40 43 — (41) 42 Reserves Not Deducted From Assets (1) : Year ended 2020 $ 12 $ 3 $ — $ (4) $ 11 Year ended 2019 13 4 — (5) 12 Year ended 2018 13 6 — (6) 13 The notes to the consolidated BHE financial statements are an integral part of this financial statement schedule. (1) Reserves not deducted from assets relate primarily to estimated liabilities for losses retained by BHE for workers compensation, public liability and property damage claims.
MidAmerican Funding, LLC and Subsidiaries [Member]
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Consolidated Valuation and Qualifying Accounts [Text Block]	MIDAMERICAN FUNDING, LLC AND SUBSIDIARIES CONSOLIDATED VALUATION AND QUALIFYING ACCOUNTS FOR THE THREE YEARS ENDED DECEMBER 31, 2020 (Amounts in millions) Column B Column C Column E Balance at Additions Balance Column A Beginning Charged Column D at End Description of Year to Income Deductions of Year Reserves Deducted From Assets To Which They Apply: Reserve for uncollectible accounts receivable: Year ended 2020 $ 5 $ 12 $ (5) $ 12 Year ended 2019 $ 7 $ 9 $ (11) $ 5 Year ended 2018 $ 7 $ 8 $ (8) $ 7 Reserves Not Deducted From Assets (1) : Year ended 2020 $ 12 $ 3 $ (4) $ 11 Year ended 2019 $ 13 $ 4 $ (5) $ 12 Year ended 2018 $ 13 $ 6 $ (6) $ 13 (1) Reserves not deducted from assets include primarily estimated liabilities for losses retained by MidAmerican Funding and MHC for workers compensation, public liability and property damage claims.
MidAmerican Energy Company [Member]
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Consolidated Valuation and Qualifying Accounts [Text Block]	MIDAMERICAN ENERGY COMPANY VALUATION AND QUALIFYING ACCOUNTS FOR THE THREE YEARS ENDED DECEMBER 31, 2020 (Amounts in millions) Column B Column C Column E Balance at Additions Balance Column A Beginning Charged Column D at End Description of Year to Income Deductions of Year Reserves Deducted From Assets To Which They Apply: Reserve for uncollectible accounts receivable: Year ended 2020 $ 5 $ 12 $ (5) $ 12 Year ended 2019 $ 7 $ 9 $ (11) $ 5 Year ended 2018 $ 7 $ 8 $ (8) $ 7 Reserves Not Deducted From Assets (1) : Year ended 2020 $ 12 $ 3 $ (4) $ 11 Year ended 2019 $ 13 $ 4 $ (5) $ 12 Year ended 2018 $ 13 $ 6 $ (6) $ 13 (1) Reserves not deducted from assets include estimated liabilities for losses retained by MidAmerican Energy for workers compensation, public liability and property damage claims.

Revenue from Contract with Cust

Revenue from Contract with Customer (Notes)	12 Months Ended
	Dec. 31, 2020
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer [Text Block]	Revenue from Contracts with Customers Energy Products and Services The following table summarizes the Company's energy products and services revenue by regulated energy and nonregulated energy, with further disaggregation of regulated energy by line of business, including a reconciliation to the Company's reportable segment information included in Note 22 (in millions): For the Year Ended December 31, 2020 PacifiCorp MidAmerican Funding NV Energy Northern Powergrid BHE Pipeline Group BHE Transmission BHE Renewables BHE and Other (1) Total Customer Revenue: Regulated: Retail Electric $ 4,932 $ 1,924 $ 2,566 $ — $ — $ — $ — $ (1) $ 9,421 Retail Gas — 505 114 — — — — — 619 Wholesale 107 199 45 — 17 — — (2) 366 Transmission and 96 60 95 887 — 641 — — 1,779 Interstate pipeline — — — — 1,397 — — (139) 1,258 Other 108 — 2 — — — — — 110 Total Regulated 5,243 2,688 2,822 887 1,414 641 — (142) 13,553 Nonregulated — 16 2 26 134 18 817 515 1,528 Total Customer Revenue 5,243 2,704 2,824 913 1,548 659 817 373 15,081 Other revenue (1) 98 24 30 109 30 — 119 65 475 Total $ 5,341 $ 2,728 $ 2,854 $ 1,022 $ 1,578 $ 659 $ 936 $ 438 $ 15,556 For the Year Ended December 31, 2019 PacifiCorp MidAmerican Funding NV Energy Northern Powergrid BHE Pipeline Group BHE Transmission BHE Renewables BHE and Other (1) Total Customer Revenue: Regulated: Retail Electric $ 4,789 $ 1,938 $ 2,740 $ — $ — $ — $ — $ (2) $ 9,465 Retail Gas — 570 116 — — — — — 686 Wholesale 99 309 51 — — — — (2) 457 Transmission and 98 57 98 876 — 690 — — 1,819 Interstate pipeline — — — — 1,122 — — (118) 1,004 Other — — 2 — — — — — 2 Total Regulated 4,986 2,874 3,007 876 1,122 690 — (122) 13,433 Nonregulated — 30 — 36 — 17 744 577 1,404 Total Customer Revenue 4,986 2,904 3,007 912 1,122 707 744 455 14,837 Other revenue (1) 82 23 30 101 9 — 188 101 534 Total $ 5,068 $ 2,927 $ 3,037 $ 1,013 $ 1,131 $ 707 $ 932 $ 556 $ 15,371 For the Year Ended December 31, 2018 PacifiCorp MidAmerican Funding NV Energy Northern Powergrid BHE Pipeline Group BHE Transmission BHE Renewables BHE and Other (1) Total Customer Revenue: Regulated: Retail Electric $ 4,732 $ 1,915 $ 2,773 $ — $ — $ — $ — $ (1) $ 9,419 Retail Gas — 636 101 — — — — — 737 Wholesale 55 411 39 — — — — (4) 501 Transmission and 103 56 96 892 — 700 — (1) 1,846 Interstate pipeline — — — — 1,232 — — (125) 1,107 Other — — 2 — — — — — 2 Total Regulated 4,890 3,018 3,011 892 1,232 700 — (131) 13,612 Nonregulated — 14 — 39 — 10 673 624 1,360 Total Customer Revenue 4,890 3,032 3,011 931 1,232 710 673 493 14,972 Other revenue (1) 136 21 28 89 (29) — 235 121 601 Total $ 5,026 $ 3,053 $ 3,039 $ 1,020 $ 1,203 $ 710 $ 908 $ 614 $ 15,573 (1) Includes net payments to counterparties for the financial settlement of certain derivative contracts at BHE Pipeline Group. Real Estate Services The following table summarizes the Company's real estate services revenue by line of business (in millions): HomeServices Years Ended December 31, 2020 2019 2018 Customer Revenue: Brokerage $ 4,520 $ 4,028 $ 3,882 Franchise 76 68 67 Total Customer Revenue 4,596 4,096 3,949 Mortgage and other revenue 800 377 265 Total $ 5,396 $ 4,473 $ 4,214 Remaining Performance Obligations The following table summarizes the Company's revenue it expects to recognize in future periods related to significant unsatisfied remaining performance obligations for fixed contracts with expected durations in excess of one year as of December 31, 2020, by reportable segment (in millions): Performance obligations expected to be satisfied Less than 12 months More than 12 months Total BHE Pipeline Group $ 2,563 $ 22,088 $ 24,651 BHE Transmission 647 — 647 Total $ 3,210 $ 22,088 $ 25,298
MidAmerican Energy Company [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer [Text Block]	MidAmerican Energy uses a single five-step model to identify and recognize revenue from contracts with customers ("Customer Revenue") upon transfer of control of promised goods or services to customers in an amount that reflects the consideration to which it expects to be entitled in exchange for those goods or services. The following table summarizes MidAmerican Energy's revenue by line of business and customer class, including a reconciliation to MidAmerican Energy's reportable segment information included in Note 18, (in millions): For the Year Ended December 31, 2020 Electric Natural Gas Other Total Customer Revenue: Retail: Residential $ 685 $ 342 $ — $ 1,027 Commercial 304 111 — 415 Industrial 804 14 — 818 Natural gas transportation services — 36 — 36 Other retail 131 2 — 133 Total retail 1,924 505 — 2,429 Wholesale 133 66 — 199 Multi-value transmission projects 60 — — 60 Other Customer Revenue — — 8 8 Total Customer Revenue 2,117 571 8 2,696 Other revenue 22 2 — 24 Total operating revenue $ 2,139 $ 573 $ 8 $ 2,720 For the Year Ended December 31, 2019 Electric Natural Gas Other Total Customer Revenue: Retail: Residential $ 672 $ 383 $ — $ 1,055 Commercial 322 132 — 454 Industrial 799 17 — 816 Natural gas transportation services — 38 — 38 Other retail 145 — — 145 Total retail 1,938 570 — 2,508 Wholesale 221 88 — 309 Multi-value transmission projects 57 — — 57 Other Customer Revenue — — 28 28 Total Customer Revenue 2,216 658 28 2,902 Other revenue 21 2 — 23 Total operating revenue $ 2,237 $ 660 $ 28 $ 2,925 For the Year Ended December 31, 2018 Electric Natural Gas Other Total Customer Revenue: Retail: Residential $ 696 $ 421 $ — $ 1,117 Commercial 314 153 — 467 Industrial 758 22 — 780 Natural gas transportation services — 39 — 39 Other retail 147 1 — 148 Total retail 1,915 636 — 2,551 Wholesale 295 116 — 411 Multi-value transmission projects 55 — — 55 Other Customer Revenue — — 11 11 Total Customer Revenue 2,265 752 11 3,028 Other revenue 18 2 1 21 Total operating revenue $ 2,283 $ 754 $ 12 $ 3,049
MidAmerican Funding, LLC and Subsidiaries [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer [Text Block]	Refer to Note 14 of MidAmerican Energy's Notes to Financial Statements. Additionally, MidAmerican Funding had $8 million, $2 million and $4 million of other revenue from contracts with customers for the year ended December 31, 2020, 2019 and 2018, respectively.
MidAmerican Energy Company [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer [Text Block]	Revenue from Contracts with Customers The following table summarizes PacifiCorp's revenue by regulated energy, with further disaggregation of regulated energy by customer class, for the years ended December 31 (in millions): 2020 2019 2018 Customer Revenue: Retail: Residential $ 1,910 $ 1,783 $ 1,737 Commercial 1,578 1,522 1,513 Industrial 1,185 1,176 1,172 Other retail 259 230 234 Total retail 4,932 4,711 4,656 Wholesale 107 99 55 Transmission 96 98 103 Other Customer Revenue 108 78 76 Total Customer Revenue 5,243 4,986 4,890 Other revenue 98 82 136 Total operating revenue $ 5,341 $ 5,068 $ 5,026
Nevada Power Company [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer [Text Block]	Revenues from Contracts with Customers The following table summarizes Nevada Power's revenue from contracts with customers ("Customer Revenue") by customer class for the years ended December 31 (in millions): 2020 2019 2018 Customer Revenue: Retail: Residential $ 1,145 $ 1,141 $ 1,195 Commercial 384 441 433 Industrial 345 433 425 Other 12 20 24 Total fully bundled 1,886 2,035 2,077 Distribution only service 24 31 30 Total retail 1,910 2,066 2,107 Wholesale, transmission and other 62 57 53 Total Customer Revenue 1,972 2,123 2,160 Other revenue 26 25 24 Total revenue $ 1,998 $ 2,148 $ 2,184
Sierra Pacific Power Company [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer [Text Block]	Revenues from Contracts with Customers The following table summarizes Sierra Pacific's revenue from contracts with customers ("Customer Revenue") by customer class, including a reconciliation to Sierra Pacific's reportable segment information included in Note 17, for the years ended December 31 (in millions): 2020 2019 2018 Electric Natural Gas Total Electric Natural Gas Total Electric Natural Gas Total Customer Revenue: Retail: Residential $ 273 $ 76 $ 349 $ 268 $ 76 $ 344 $ 267 $ 67 $ 334 Commercial 233 29 262 245 30 275 246 25 271 Industrial 170 9 179 186 10 196 177 8 185 Other 5 — 5 6 1 7 6 1 7 Total fully bundled 681 114 795 705 117 822 696 101 797 Distribution only service 4 — 4 4 — 4 4 — 4 Total retail 685 114 799 709 117 826 700 101 801 Wholesale, transmission and other 50 — 50 57 — 57 48 — 48 Total Customer Revenue 735 114 849 766 117 883 748 101 849 Other revenue 3 2 5 4 2 6 4 2 6 Total revenue $ 738 $ 116 $ 854 $ 770 $ 119 $ 889 $ 752 $ 103 $ 855
Eastern Energy Gas Holdings, LLC [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer [Text Block]	Revenue from Contracts with Customers Eastern Energy Gas uses a single five-step model to identify and recognize revenue from contracts with customers upon transfer of control of promised goods or services in an amount that reflects the consideration to which Eastern Energy Gas expects to be entitled in exchange for those goods or services. The following table summarizes Eastern Energy Gas' energy products and services revenue by regulated and nonregulated for the years ended December 31 (in millions): 2020 2019 2018 Customer Revenue: Regulated: Gas transportation and storage $ 1,242 $ 1,300 $ 1,249 Wholesale 43 9 25 Other 4 7 19 Total regulated 1,289 1,316 1,293 Nonregulated 798 849 709 Total Customer Revenue 2,087 2,165 2,002 Other revenue 3 4 (6) Total operating revenue $ 2,090 $ 2,169 $ 1,996 Remaining Performance Obligations The following table summarizes Eastern Energy Gas' revenue it expects to recognize in future periods related to significant unsatisfied remaining performance obligations for fixed contracts with expected durations in excess of one year as of December 31, 2020 (in millions): Performance obligations expected to be satisfied Less than 12 months More than 12 months Total Eastern Energy Gas $ 1,575 $ 17,073 $ 18,648

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2020
Allowance for Doubtful Accounts [Line Items]
Basis of consolidation and presentation [Policy Text Block]	Basis of Consolidation and PresentationThe Consolidated Financial Statements include the accounts of BHE and its subsidiaries in which it holds a controlling financial interest as of the financial statement date. The Consolidated Statements of Operations include the revenue and expenses of any acquired entities from the date of acquisition. The Company consolidates variable interest entities ("VIE") in which it possesses both (i) the power to direct the activities that most significantly impact the entity's economic performance and (ii) the obligation to absorb losses or receive benefits from the entity that could potentially be significant to the VIE. Intercompany accounts and transactions have been eliminated.
Use of estimates in preparation of financial statements [Policy Text Block]	Use of Estimates in Preparation of Financial Statements The preparation of the Consolidated Financial Statements in conformity with accounting principles generally accepted in the United States of America ("GAAP") requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the period. These estimates include, but are not limited to, the effects of regulation; impairment of goodwill; recovery of long-lived assets; certain assumptions made in accounting for pension and other postretirement benefits; asset retirement obligations ("AROs"); income taxes; unbilled revenue; fair value of assets acquired and liabilities assumed in business combinations; valuation of certain financial assets and liabilities, including derivative contracts; and accounting for contingencies. Actual results may differ from the estimates used in preparing the Consolidated Financial Statements.
Accounting for the effects of certain types of regulation [Policy Text Block]	Accounting for the Effects of Certain Types of Regulation PacifiCorp, MidAmerican Energy, Nevada Power, Sierra Pacific, BHE GT&S, Northern Natural Gas, Kern River and AltaLink (the "Regulated Businesses") prepare their financial statements in accordance with authoritative guidance for regulated operations, which recognizes the economic effects of regulation. Accordingly, the Regulated Businesses defer the recognition of certain costs or income if it is probable that, through the ratemaking process, there will be a corresponding increase or decrease in future regulated rates. Regulatory assets and liabilities are established to reflect the impacts of these deferrals, which will be recognized in earnings in the periods the corresponding changes in regulated rates occur.
Fair value measurement [Policy Text Block]	Fair Value Measurements As defined under GAAP, fair value is the price that would be received to sell an asset or paid to transfer a liability between market participants in the principal market or in the most advantageous market when no principal market exists. Adjustments to transaction prices or quoted market prices may be required in illiquid or disorderly markets in order to estimate fair value. Alternative valuation techniques may be appropriate under the circumstances to determine the value that would be received to sell an asset or paid to transfer a liability in an orderly transaction. Market participants are assumed to be independent, knowledgeable, able and willing to transact an exchange and not under duress. Nonperformance or credit risk is considered in determining fair value. Considerable judgment may be required in interpreting market data used to develop the estimates of fair value. Accordingly, estimates of fair value presented herein are not necessarily indicative of the amounts that could be realized in a current or future market exchange.
Cash and Cash Equivalents, Policy [Policy Text Block]	Cash Equivalents and Restricted Cash and Cash Equivalents and Investments Cash equivalents consist of funds invested in money market mutual funds, United States Treasury Bills and other investments with a maturity of three months or less when purchased. Cash and cash equivalents exclude amounts where availability is restricted by legal requirements, loan agreements or other contractual provisions. Restricted cash and cash equivalents consist substantially of funds restricted for the purpose of constructing solid waste facilities under tax-exempt bond obligation agreements and debt service obligations for certain of the Company's nonregulated renewable energy projects. Restricted amounts are included in restricted cash and cash equivalents and investments and restricted cash and cash equivalents and investments on the Consolidated Balance Sheets.
Investments [Policy Text Block]	Investments Fixed Maturity Securities The Company's management determines the appropriate classification of investments in fixed maturity securities at the acquisition date and reevaluates the classification at each balance sheet date. Investments and restricted cash and cash equivalents and investments that management does not intend to use or is restricted from using in current operations are presented as noncurrent on the Consolidated Balance Sheets. Available-for-sale investments are carried at fair value with realized gains and losses, as determined on a specific identification basis, recognized in earnings and unrealized gains and losses recognized in AOCI, net of tax. Realized and unrealized gains and losses on fixed maturity securities in a trust related to the decommissioning of nuclear generation assets are recorded as a net regulatory liability since the Company expects to recover costs for these activities through regulated rates. Trading investments are carried at fair value with changes in fair value recognized in earnings. Held-to-maturity investments are carried at amortized cost, reflecting the ability and intent to hold the securities to maturity. The difference between the original cost and maturity value of a fixed maturity security is amortized to earnings using the interest method. Investment gains and losses arise when investments are sold (as determined on a specific identification basis) or are other-than-temporarily impaired with respect to securities classified as available-for-sale. If the value of a fixed maturity investment declines to below amortized cost and the decline is deemed other than temporary, the amortized cost of the investment is reduced to fair value, with a corresponding charge to earnings. Any resulting impairment loss is recognized in earnings if the Company intends to sell, or expects to be required to sell, the debt security before its amortized cost is recovered. If the Company does not expect to ultimately recover the amortized cost basis even if it does not intend to sell the security, the credit loss component is recognized in earnings and any difference between fair value and the amortized cost basis, net of the credit loss, is reflected in other comprehensive income (loss) ("OCI"). For regulated fixed maturity investments, any impairment charge is offset by the establishment of a regulatory asset to the extent recovery in regulated rates is probable. Equity Securities Investments in equity securities are carried at fair value with changes in fair value recognized in earnings as a component of gains (losses) on marketable securities, net. Prior to January 1, 2018, substantially all of the Company's equity security investments were classified as available-for-sale with changes in fair value recognized in OCI, net of income taxes. All changes in fair value of equity securities in a trust related to the decommissioning of nuclear generation assets are recorded as a net regulatory liability since the Company expects to recover costs for these activities through regulated rates. Equity Method Investments The Company utilizes the equity method of accounting with respect to investments when it possesses the ability to exercise significant influence, but not control, over the operating and financial policies of the investee. The ability to exercise significant influence is presumed when the investor possesses more than 20% of the voting interests of the investee. This presumption may be overcome based on specific facts and circumstances that demonstrate the ability to exercise significant influence is restricted. In applying the equity method, the Company records the investment at cost and subsequently increases or decreases the carrying value of the investment by the Company's share of the net earnings or losses and OCI of the investee. The Company records dividends or other equity distributions as reductions in the carrying value of the investment. Certain equity investments are presented on the Consolidated Balance Sheets net of related investment tax credits.
Allowance for doubtful accounts [Policy Text Block]	Allowance for Credit Losses Trade receivables are primarily short-term in nature with stated collection terms of less than one year from the date of origination and are stated at the outstanding principal amount, net of an estimated allowance for credit losses. The allowance for credit losses is based on the Company's assessment of the collectability of amounts owed to the Company by its customers. This assessment requires judgment regarding the ability of customers to pay or the outcome of any pending disputes. In measuring the allowance for credit losses for trade receivables, the Company primarily utilizes credit loss history. However, the Company may adjust the allowance for credit losses to reflect current conditions and reasonable and supportable forecasts that deviate from historical experience. As of December 31, 2020 and 2019, the allowance for credit losses totaled $77 million and $44 million, respectively, and is included in trade receivables, net on the Consolidated Balance Sheets.
Derivatives [Policy Text Block]	Derivatives The Company employs a number of different derivative contracts, which may include forwards, futures, options, swaps and other agreements, to manage its commodity price, interest rate, and foreign currency exchange rate risk. Derivative contracts are recorded on the Consolidated Balance Sheets as either assets or liabilities and are stated at estimated fair value unless they are designated as normal purchases or normal sales and qualify for the exception afforded by GAAP. Derivative balances reflect offsetting permitted under master netting agreements with counterparties and cash collateral paid or received under such agreements. Cash collateral received from or paid to counterparties to secure derivative contract assets or liabilities in excess of amounts offset is included in other current assets on the Consolidated Balance Sheets. Commodity derivatives used in normal business operations that are settled by physical delivery, among other criteria, are eligible for and may be designated as normal purchases or normal sales. Normal purchases or normal sales contracts are not marked-to-market and settled amounts are recognized as operating revenue or cost of sales on the Consolidated Statements of Operations. For the Company's derivatives not designated as hedging contracts, the settled amount is generally included in regulated rates. Accordingly, the net unrealized gains and losses associated with interim price movements on contracts that are accounted for as derivatives and probable of inclusion in regulated rates are recorded as regulatory assets and liabilities. For the Company's derivatives not designated as hedging contracts and for which changes in fair value are not recorded as regulatory assets and liabilities, unrealized gains and losses are recognized on the Consolidated Statements of Operations as operating revenue for sales contracts; cost of sales and operating expense for purchase contracts and electricity, natural gas and fuel swap contracts; and other, net for interest rate swap derivatives. For the Company's derivatives designated as hedging contracts, the Company formally assesses, at inception and thereafter, whether the hedging contract is highly effective in offsetting changes in the hedged item. The Company formally documents hedging activity by transaction type and risk management strategy.
Inventories [Policy Text Block]	Inventories Inventories consist mainly of fuel, which includes coal stocks, stored gas and fuel oil, totaling $382 million and $257 million as of December 31, 2020 and 2019, respectively, and materials and supplies totaling $786 million and $616 million as of December 31, 2020 and 2019, respectively. The cost of materials and supplies, coal stocks and fuel oil is determined primarily using the average cost method. The cost of stored gas is determined using either the last-in-first-out ("LIFO") method or the lower of average cost or market. With respect to inventories carried at LIFO cost, the replacement cost would be $10 million higher and $2 million lower as of December 31, 2020 and 2019, respectively.
Property, plant and equipment, net - general [Policy Text Block]	Property, Plant and Equipment, Net General Additions to property, plant and equipment are recorded at cost. The Company capitalizes all construction-related materials, direct labor and contract services, as well as indirect construction costs. Indirect construction costs include capitalized interest, including debt allowance for funds used during construction ("AFUDC"), and equity AFUDC, as applicable to the Regulated Businesses. The cost of additions and betterments are capitalized, while costs incurred that do not improve or extend the useful lives of the related assets are generally expensed. Additionally, MidAmerican Energy has regulatory arrangements in Iowa in which the carrying cost of certain utility plant has been reduced for amounts associated with electric returns on equity exceeding specified thresholds. Depreciation and amortization are generally computed by applying the composite or straight-line method based on either estimated useful lives or mandated recovery periods as prescribed by the Company's various regulatory authorities. Depreciation studies are completed by the Regulated Businesses to determine the appropriate group lives, net salvage and group depreciation rates. These studies are reviewed and rates are ultimately approved by the applicable regulatory commission. Net salvage includes the estimated future residual values of the assets and any estimated removal costs recovered through approved depreciation rates. Estimated removal costs are recorded as either a cost of removal regulatory liability or an ARO liability on the Consolidated Balance Sheets, depending on whether the obligation meets the requirements of an ARO. As actual removal costs are incurred, the associated liability is reduced. Generally when the Company retires or sells a component of regulated property, plant and equipment, it charges the original cost, net of any proceeds from the disposition, to accumulated depreciation. Any gain or loss on disposals of all other assets is recorded through earnings. Debt and equity AFUDC, which represent the estimated costs of debt and equity funds necessary to finance the construction of regulated facilities, is capitalized by the Regulated Businesses as a component of property, plant and equipment, with offsetting credits to the Consolidated Statements of Operations. AFUDC is computed based on guidelines set forth by the Federal Energy Regulatory Commission ("FERC") and the Alberta Utilities Commission ("AUC"). After construction is completed, the Company is permitted to earn a return on these costs as a component of the related assets, as well as recover these costs through depreciation expense over the useful lives of the related assets.
Property, plant and equipment, net - asset retirement obligations [Policy Text Block]	Asset Retirement ObligationsThe Company recognizes AROs when it has a legal obligation to perform decommissioning, reclamation or removal activities upon retirement of an asset. The Company's AROs are primarily related to the decommissioning of nuclear generating facilities and obligations associated with its other generating facilities and offshore natural gas pipelines. The fair value of an ARO liability is recognized in the period in which it is incurred, if a reasonable estimate of fair value can be made, and is added to the carrying amount of the associated asset, which is then depreciated over the remaining useful life of the asset. Subsequent to the initial recognition, the ARO liability is adjusted for any revisions to the original estimate of undiscounted cash flows (with corresponding adjustments to property, plant and equipment, net) and for accretion of the ARO liability due to the passage of time. For the Regulated Businesses, the difference between the ARO liability, the corresponding ARO asset included in property, plant and equipment, net and amounts recovered in rates to satisfy such liabilities is recorded as a regulatory asset or liability.
Property, plant and equipment, net - impairment [Policy Text Block]	ImpairmentThe Company evaluates long-lived assets for impairment, including property, plant and equipment, when events or changes in circumstances indicate that the carrying value of such assets may not be recoverable or the assets are being held for sale. Upon the occurrence of a triggering event, the asset is reviewed to assess whether the estimated undiscounted cash flows expected from the use of the asset plus the residual value from the ultimate disposal exceeds the carrying value of the asset. If the carrying value exceeds the estimated recoverable amounts, the asset is written down to the estimated fair value and any resulting impairment loss is reflected on the Consolidated Statements of Operations. The impacts of regulation are considered when evaluating the carrying value of regulated assets.
Lessee, Leases [Policy Text Block]	Leases The Company has non-cancelable operating leases primarily for office space, office equipment, generating facilities, land and rail cars and finance leases consisting primarily of transmission assets, generating facilities and vehicles. These leases generally require the Company to pay for insurance, taxes and maintenance applicable to the leased property. Given the capital intensive nature of the utility industry, it is common for a portion of lease costs to be capitalized when used during construction or maintenance of assets, in which the associated costs will be capitalized with the corresponding asset and depreciated over the remaining life of that asset. Certain leases contain renewal options for varying periods and escalation clauses for adjusting rent to reflect changes in price indices. The Company does not include options in its lease calculations unless there is a triggering event indicating the Company is reasonably certain to exercise the option. The Company's accounting policy is to not recognize right-of-use assets and lease obligations for leases with contract terms of one year or less and not separate lease components from non-lease components and instead account for each separate lease component and the non-lease components associated with a lease as a single lease component. Leases will be evaluated for impairment in line with Accounting Standards Codification ("ASC") 360, "Property, Plant and Equipment" when a triggering event has occurred that might affect the value and use of the assets being leased. The Company's leases of generating facilities generally are for the long-term purchase of electric energy, also known as power purchase agreements ("PPA"). PPAs are generally signed before or during the early stages of project construction and can yield a lease that has not yet commenced. These agreements are primarily for renewable energy and the payments are considered variable lease payments as they are based on the amount of output. The Company's operating and finance right-of-use assets are recorded in other assets and the operating and finance lease liabilities are recorded in current and long-term other liabilities accordingly.
Goodwill [Policy Text Block]	Goodwill Goodwill represents the excess of the purchase price over the fair value of identifiable net assets acquired in business combinations. The Company evaluates goodwill for impairment at least annually and completed its annual review as of October 31. When evaluating goodwill for impairment, the Company estimates the fair value of its reporting units. If the carrying amount of a reporting unit, including goodwill, exceeds the estimated fair value, then the excess is charged to earnings as an impairment loss. Significant judgment is required in estimating the fair value of the reporting unit and performing goodwill impairment tests. The Company uses a variety of methods to estimate a reporting unit's fair value, principally discounted projected future net cash flows. Key assumptions used include, but are not limited to, the use of estimated future cash flows; multiples of earnings or rate base; and an appropriate discount rate. In estimating future cash flows, the Company incorporates current market information, as well as historical factors. As such, the determination of fair value incorporates significant unobservable inputs. During 2020, 2019 and 2018, the Company did not record any material goodwill impairments.
Revenue recognition [Policy Text Block]	Revenue Recognition Customer Revenue The Company uses a single five-step model to identify and recognize revenue from contracts with customers ("Customer Revenue") upon transfer of control of promised goods or services in an amount that reflects the consideration to which the Company expects to be entitled in exchange for those goods or services. The Company records sales, franchise and excise taxes collected directly from customers and remitted directly to the taxing authorities on a net basis on the Consolidated Statements of Operations. In the event one of the parties to a contract has performed before the other, the Company would recognize a contract asset or contract liability depending on the relationship between the Company's performance and the customer's payment. Energy Products and Services A majority of the Company's energy revenue is derived from tariff-based sales arrangements approved by various regulatory commissions. These tariff-based revenues are mainly comprised of energy, transmission, distribution and natural gas and have performance obligations to deliver energy products and services to customers which are satisfied over time as energy is delivered or services are provided. The Company's energy revenue that is nonregulated primarily relates to the Company's renewable energy business. Revenue recognized is equal to what the Company has the right to invoice as it corresponds directly with the value to the customer of the Company's performance to date and includes billed and unbilled amounts. As of December 31, 2020 and 2019, trade receivables, net on the Consolidated Balance Sheets relate substantially to Customer Revenue, including unbilled revenue of $750 million and $638 million, respectively. Payments for amounts billed are generally due from the customer within 30 days of billing. Rates charged for energy products and services are established by regulators or contractual arrangements that establish the transaction price as well as the allocation of price amongst the separate performance obligations. When preliminary regulated rates are permitted to be billed prior to final approval by the applicable regulator, certain revenue collected may be subject to refund and a liability for estimated refunds is accrued. Real Estate Services The Company's HomeServices reportable segment consists of separate brokerage, mortgage and franchise businesses. Rates charged for brokerage, mortgage and franchise real estate services are established through contractual arrangements that establish the transaction price and the allocation of the price amongst the separate performance obligations. The full-service residential real estate brokerage business has performance obligations to deliver integrated real estate services including brokerage services, title and closing services, property and casualty insurance, home warranties, relocation services, and other home-related services to customers. All performance obligations related to the full-service residential real estate brokerage business are satisfied in less than one year at the point in time when a real estate transaction is closed or when services are provided. Commission revenue from real estate brokerage transactions and related amounts due to agents are recognized when a real estate transaction is closed. Title and escrow closing fee revenue from real estate transactions and related amounts due to the title insurer are recognized at closing. Payments for amounts billed are generally due from the customer at closing. The franchise business operates a network that has performance obligations to provide the right to use certain brand names and other related service marks as well as to provide orientation programs, training and consultation services, advertising programs and other services to its franchisees. The performance obligations related to the franchise business are satisfied over time or when the services are provided. Franchise royalty fees are sales-based variable consideration and are based on a percentage of commissions earned by franchisees on real estate sales, which are recognized when the sale closes. Meetings and training revenue, referral fees, late fees, service fees and franchise termination fees are earned when services have been completed. Payments for amounts billed are generally due from the franchisee within 30 days of billing. Other Revenue Energy Products and Services Other revenue consists primarily of revenue related to power purchase agreements not considered Customer Revenue as they are recognized in accordance with ASC 815, "Derivatives and Hedging" and ASC 842, "Leases" and certain non-tariff-based revenue approved by the regulator that is not considered Customer Revenue within ASC 606, "Revenue from Contracts with Customers." Real Estate Service Mortgage and other revenue consists primarily of revenue related to the mortgage business. Mortgage fee revenue consists of amounts earned related to application and underwriting fees, and fees on canceled loans. Fees associated with the origination of mortgage loans are recognized as earned. These amounts are not considered Customer Revenue as they are recognized in accordance with ASC 815, "Derivatives and Hedging," ASC 825, "Financial Instruments" and ASC 860, "Transfers and Servicing."
Unamortized debt premiums, discounts and financing costs [Policy Text Block]	Unamortized Debt Premiums, Discounts and Debt Issuance Costs Premiums, discounts and debt issuance costs incurred for the issuance of long-term debt are amortized over the term of the related financing using the effective interest method.
Foreign currency [Policy Text Block]	Foreign Currency The accounts of foreign-based subsidiaries are measured in most instances using the local currency of the subsidiary as the functional currency. Revenue and expenses of these businesses are translated into United States dollars at the average exchange rate for the period. Assets and liabilities are translated at the exchange rate as of the end of the reporting period. Gains or losses from translating the financial statements of foreign-based operations are included in equity as a component of AOCI. Gains or losses arising from transactions denominated in a currency other than the functional currency of the entity that is party to the transaction are included in earnings.
Income taxes [Policy Text Block]	Income Taxes The Company's provision for income taxes has been computed on a stand-alone basis. Berkshire Hathaway includes the Company in its consolidated United States federal and Iowa state income tax returns and the majority of the Company's United States federal income tax is remitted to or received from Berkshire Hathaway. The Company records the deferred income tax assets associated with the state of Iowa net operating loss carryforward as a long-term income tax receivable from Berkshire Hathaway as a component of BHE's shareholders' equity due to the long-term related-party nature of the income tax receivable.
Unremitted earnings in foreign investment [Policy Text Block]	The Company has not established deferred income taxes on its undistributed foreign earnings that have been determined by management to be reinvested indefinitely; however, the Company periodically evaluates its capital requirements. If circumstances change in the future and a portion of the Company's undistributed foreign earnings were repatriated, the dividends may be subject to taxation in the United States but the tax is not expected to be material.
Income tax uncertainties [Policy Text Block]	In determining the Company's income taxes, management is required to interpret complex income tax laws and regulations, which includes consideration of regulatory implications imposed by the Company's various regulatory commissions. The Company's income tax returns are subject to continuous examinations by federal, state, local and foreign income tax authorities that may give rise to different interpretations of these complex laws and regulations. Due to the nature of the examination process, it generally takes years before these examinations are completed and these matters are resolved. The Company recognizes the tax benefit from an uncertain tax position only if it is more-likely-than-not that the tax position will be sustained on examination by the taxing authorities, based on the technical merits of the position. The tax benefits recognized in the Consolidated Financial Statements from such a position are measured based on the largest benefit that is more-likely-than-not to be realized upon ultimate settlement. Although the ultimate resolution of the Company's federal, state, local and foreign income tax examinations is uncertain, the Company believes it has made adequate provisions for these income tax positions. The aggregate amount of any additional income tax liabilities that may result from these examinations, if any, is not expected to have a material impact on the Company's consolidated financial results. The Company's unrecognized tax benefits are primarily included in accrued property, income and other taxes and other long-term liabilities on the Consolidated Balance Sheets. Estimated interest and penalties, if any, related to uncertain tax positions are included as a component of income tax expense on the Consolidated Statements of Operations.
PacifiCorp [Member]
Allowance for Doubtful Accounts [Line Items]
Basis of consolidation and presentation [Policy Text Block]	Basis of Consolidation and PresentationThe Consolidated Financial Statements include the accounts of PacifiCorp and its subsidiaries in which it holds a controlling financial interest as of the financial statement date. Intercompany accounts and transactions have been eliminated.
Use of estimates in preparation of financial statements [Policy Text Block]	Use of Estimates in Preparation of Financial StatementsThe preparation of the Consolidated Financial Statements in conformity with accounting principles generally accepted in the United States of America ("GAAP") requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the period. These estimates include, but are not limited to, the effects of regulation; certain assumptions made in accounting for pension and other postretirement benefits; asset retirement obligations ("AROs"); income taxes; unbilled revenue; valuation of certain financial assets and liabilities, including derivative contracts; and accounting for loss contingencies, including those related to the Oregon and Northern California 2020 wildfires (the "2020 Wildfires") described in Note 14. Actual results may differ from the estimates used in preparing the Consolidated Financial Statements.
Accounting for the effects of certain types of regulation [Policy Text Block]	Accounting for the Effects of Certain Types of Regulation PacifiCorp prepares its financial statements in accordance with authoritative guidance for regulated operations, which recognizes the economic effects of regulation. Accordingly, PacifiCorp defers the recognition of certain costs or income if it is probable that, through the ratemaking process, there will be a corresponding increase or decrease in future rates. Regulatory assets and liabilities are established to reflect the impacts of these deferrals, which will be recognized in earnings in the periods the corresponding changes in rates occur.
Fair value measurement [Policy Text Block]	Fair Value Measurements As defined under GAAP, fair value is the price that would be received to sell an asset or paid to transfer a liability between market participants in the principal market or in the most advantageous market when no principal market exists. Adjustments to transaction prices or quoted market prices may be required in illiquid or disorderly markets in order to estimate fair value. Different valuation techniques may be appropriate under the circumstances to determine the value that would be received to sell an asset or paid to transfer a liability in an orderly transaction. Market participants are assumed to be independent, knowledgeable, able and willing to transact an exchange and not under duress. Nonperformance or credit risk is considered in determining fair value. Considerable judgment may be required in interpreting market data used to develop the estimates of fair value. Accordingly, estimates of fair value presented herein are not necessarily indicative of the amounts that could be realized in a current or future market exchange.
Investments [Policy Text Block]	Investments Available-for-sale securities are carried at fair value with realized gains and losses, as determined on a specific identification basis, recognized in earnings and unrealized gains and losses recognized in AOCI, net of tax. As of December 31, 2020 and 2019, PacifiCorp had no unrealized gains and losses on available-for-sale securities. Trading securities are carried at fair value with realized and unrealized gains and losses recognized in earnings. Equity Method Investments PacifiCorp utilizes the equity method of accounting with respect to investments when it possesses the ability to exercise significant influence, but not control, over the operating and financial policies of the investee. The ability to exercise significant influence is presumed when an investor possesses more than 20% of the voting interests of the investee. This presumption may be overcome based on specific facts and circumstances that demonstrate the ability to exercise significant influence is restricted. In applying the equity method, PacifiCorp records the investment at cost and subsequently increases or decreases the carrying value of the investment by PacifiCorp's proportionate share of the net earnings or losses and other comprehensive income (loss) ("OCI") of the investee. PacifiCorp records dividends or other equity distributions as reductions in the carrying value of the investment.
Allowance for doubtful accounts [Policy Text Block]	Allowance for Credit Losses Trade receivables are primarily short-term in nature with stated collection terms of less than one year from the date of origination, and are stated at the outstanding principal amount, net of an estimated allowance for credit losses. The allowance for credit losses is based on PacifiCorp's assessment of the collectability of amounts owed to PacifiCorp by its customers. This assessment requires judgment regarding the ability of customers to pay or the outcome of any pending disputes. In measuring the allowance for credit losses for trade receivables, PacifiCorp primarily utilizes credit loss history. However, PacifiCorp may adjust the allowance for credit losses to reflect current conditions and reasonable and supportable forecasts that deviate from historical experience. The change in the balance of the allowance for credit losses, which is included in trade receivables, net on the Consolidated Balance Sheets, is summarized as follows for the years ended December 31 (in millions): 2020 2019 2018 Beginning balance $ 8 $ 8 $ 10 Charged to operating costs and expenses, net 18 13 12 Write-offs, net (9) (13) (14) Ending balance $ 17 $ 8 $ 8
Derivatives [Policy Text Block]	Derivatives PacifiCorp employs a number of different derivative contracts, which may include forwards, options, swaps and other agreements, to manage price risk for electricity, natural gas and other commodities and interest rate risk. Derivative contracts are recorded on the Consolidated Balance Sheets as either assets or liabilities and are stated at estimated fair value unless they are designated as normal purchases or normal sales and qualify for the exception afforded by GAAP. Derivative balances reflect offsetting permitted under master netting agreements with counterparties and cash collateral paid or received under such agreements. Commodity derivatives used in normal business operations that are settled by physical delivery, among other criteria, are eligible for and may be designated as normal purchases or normal sales. Normal purchases or normal sales contracts are not marked-to-market and settled amounts are recognized as operating revenue or energy costs on the Consolidated Statements of Operations. For PacifiCorp's derivative contracts, the settled amount is generally included in rates. Accordingly, the net unrealized gains and losses associated with interim price movements on contracts that are accounted for as derivatives and probable of inclusion in rates are recorded as regulatory liabilities or assets. For a derivative contract not probable of inclusion in rates, changes in the fair value are recognized in earnings.
Inventories [Policy Text Block]	InventoriesInventories consist mainly of materials, supplies and fuel stocks and are stated at the lower of average cost or net realizable value.
Property, plant and equipment, net - general [Policy Text Block]	Property, Plant and Equipment, Net General Additions to property, plant and equipment are recorded at cost. PacifiCorp capitalizes all construction-related material, direct labor and contract services, as well as indirect construction costs, which include debt and equity allowance for funds used during construction ("AFUDC"). The cost of additions and betterments are capitalized, while costs incurred that do not improve or extend the useful lives of the related assets are generally expensed. Depreciation and amortization are generally computed on the straight-line method based on composite asset class lives prescribed by PacifiCorp's various regulatory authorities or over the assets' estimated useful lives. Depreciation studies are completed periodically to determine the appropriate composite asset class lives, net salvage and depreciation rates. These studies are reviewed and rates are ultimately approved by the various regulatory authorities. Net salvage includes the estimated future residual values of the assets and any estimated removal costs recovered through approved depreciation rates. Estimated removal costs are recorded as either a cost of removal regulatory liability or an ARO liability on the Consolidated Balance Sheets, depending on whether the obligation meets the requirements of an ARO. As actual removal costs are incurred, the associated liability is reduced. Generally when PacifiCorp retires or sells a component of regulated property, plant and equipment, it charges the original cost, net of any proceeds from the disposition, to accumulated depreciation. Any gain or loss on disposals of all other assets is recorded through earnings. Debt and equity AFUDC, which represents the estimated costs of debt and equity funds necessary to finance the construction of property, plant and equipment, is capitalized as a component of property, plant and equipment, with offsetting credits to the Consolidated Statements of Operations. AFUDC is computed based on guidelines set forth by the Federal Energy Regulatory Commission ("FERC"). After construction is completed, PacifiCorp is permitted to earn a return on these costs as a component of the related assets, as well as recover these costs through depreciation expense over the useful lives of the related assets.
Property, plant and equipment, net - asset retirement obligations [Policy Text Block]	Asset Retirement Obligations PacifiCorp recognizes AROs when it has a legal obligation to perform decommissioning, reclamation or removal activities upon retirement of an asset. PacifiCorp's AROs are primarily associated with its generating facilities. The fair value of an ARO liability is recognized in the period in which it is incurred, if a reasonable estimate of fair value can be made, and is added to the carrying amount of the associated asset, which is then depreciated over the remaining useful life of the asset. Subsequent to the initial recognition, the ARO liability is adjusted for any revisions to the original estimate of undiscounted cash flows (with corresponding adjustments to property, plant and equipment, net) and for accretion of the ARO liability due to the passage of time. The difference between the ARO liability, the corresponding ARO asset included in property, plant and equipment, net and amounts recovered in rates to satisfy such liabilities is recorded as a regulatory asset or liability.
Property, plant and equipment, net - impairment [Policy Text Block]	ImpairmentPacifiCorp evaluates long-lived assets for impairment, including property, plant and equipment, when events or changes in circumstances indicate that the carrying value of such assets may not be recoverable or the assets are being held for sale. Upon the occurrence of a triggering event, the asset is reviewed to assess whether the estimated undiscounted cash flows expected from the use of the asset plus the residual value from the ultimate disposal exceeds the carrying value of the asset. If the carrying value exceeds the estimated recoverable amounts, the asset is written down to the estimated fair value and any resulting impairment loss is reflected on the Consolidated Statements of Operations. As substantially all property, plant and equipment supports PacifiCorp's regulated businesses the impacts of regulation are considered when evaluating the carrying value of regulated assets.
Lessee, Leases [Policy Text Block]	Leases PacifiCorp has non-cancelable operating leases primarily for land, office space, office equipment, and generating facilities and finance leases consisting primarily of office buildings, natural gas pipeline facilities, and generating facilities. These leases generally require PacifiCorp to pay for insurance, taxes and maintenance applicable to the leased property. Given the capital intensive nature of the utility industry, it is common for a portion of lease costs to be capitalized when used during construction or maintenance of assets, in which the associated costs will be capitalized with the corresponding asset and depreciated over the remaining life of that asset. Certain leases contain renewal options for varying periods and escalation clauses for adjusting rent to reflect changes in price indices. PacifiCorp does not include options in its lease calculations unless there is a triggering event indicating PacifiCorp is reasonably certain to exercise the option. PacifiCorp's accounting policy is to not recognize right-of-use assets and lease obligations for leases with contract terms of one year or less and not separate lease components from non-lease components and instead account for each separate lease component and the non-lease components associated with a lease as a single lease component. Right-of-use assets will be evaluated for impairment in line with Accounting Standards Codification ("ASC") 360, "Property, Plant and Equipment" when a triggering event has occurred that might affect the value and use of the assets being leased. PacifiCorp's leases of generating facilities generally are in the form of long-term purchases of electricity, also known as power purchase agreements ("PPA"). PPAs are generally signed before or during the early stages of project construction and can yield a lease that has not yet commenced. These agreements are primarily for renewable energy and the payments are considered variable lease payments as they are based on the amount of output. PacifiCorp's operating and finance right-of-use assets are recorded in other assets and the operating and finance lease liabilities are recorded in current and long-term other liabilities accordingly.
Revenue recognition [Policy Text Block]	Revenue Recognition PacifiCorp uses a single five-step model to identify and recognize revenue from contracts with customers ("Customer Revenue") upon transfer of control of promised goods or services in an amount that reflects the consideration to which PacifiCorp expects to be entitled in exchange for those goods or services. PacifiCorp records sales, franchise and excise taxes collected directly from customers and remitted directly to the taxing authorities on a net basis on the Consolidated Statements of Operations. Substantially all of PacifiCorp's Customer Revenue is derived from tariff-based sales arrangements approved by various regulatory commissions. These tariff-based revenues are mainly comprised of energy, transmission and distribution and have performance obligations to deliver energy products and services to customers which are satisfied over time as energy is delivered or services are provided. Other revenue consists primarily of revenue recognized in accordance with ASC 815, "Derivatives and Hedging."
Unamortized debt premiums, discounts and financing costs [Policy Text Block]	Unamortized Debt Premiums, Discounts and Debt Issuance Costs Premiums, discounts and debt issuance costs incurred for the issuance of long-term debt are amortized over the term of the related financing using the effective interest method.
Income taxes [Policy Text Block]	Income Taxes Berkshire Hathaway includes PacifiCorp in its consolidated United States federal income tax return. Consistent with established regulatory practice, PacifiCorp's provision for income taxes has been computed on a stand-alone basis. Deferred income tax assets and liabilities are based on differences between the financial statement and income tax basis of assets and liabilities using enacted income tax rates expected to be in effect for the year in which the differences are expected to reverse. Changes in deferred income tax assets and liabilities that are associated with components of OCI are charged or credited directly to OCI. Changes in deferred income tax assets and liabilities that are associated with certain property-related basis differences and other various differences that PacifiCorp deems probable to be passed on to its customers in most state jurisdictions are charged or credited directly to a regulatory asset or liability and will be included in regulated rates when the temporary differences reverse or as otherwise approved by PacifiCorp's various regulatory commissions. Other changes in deferred income tax assets and liabilities are included as a component of income tax expense. Changes in deferred income tax assets and liabilities attributable to changes in enacted income tax rates are charged or credited to income tax expense or a regulatory asset or liability in the period of enactment. Valuation allowances are established when necessary to reduce deferred income tax assets to the amount that is more-likely-than-not to be realized.
Income tax uncertainties [Policy Text Block]	In determining PacifiCorp's income taxes, management is required to interpret complex income tax laws and regulations, which includes consideration of regulatory implications imposed by PacifiCorp's various regulatory commissions. PacifiCorp's income tax returns are subject to continuous examinations by federal, state and local income tax authorities that may give rise to different interpretations of these complex laws and regulations. Due to the nature of the examination process, it generally takes years before these examinations are completed and these matters are resolved. PacifiCorp recognizes the tax benefit from an uncertain tax position only if it is more-likely-than-not that the tax position will be sustained on examination by the taxing authorities, based on the technical merits of the position. The tax benefits recognized in the Consolidated Financial Statements from such a position are measured based on the largest benefit that is more-likely-than-not to be realized upon ultimate settlement. Although the ultimate resolution of PacifiCorp's federal, state and local income tax examinations is uncertain, PacifiCorp believes it has made adequate provisions for these income tax positions. The aggregate amount of any additional income tax liabilities that may result from these examinations, if any, is not expected to have a material impact on PacifiCorp's consolidated financial results. PacifiCorp's unrecognized tax benefits are primarily included in other long-term liabilities on the Consolidated Balance Sheets. Estimated interest and penalties, if any, related to uncertain tax positions are included as a component of income tax expense on the Consolidated Statements of Operations.
Cash equivalent and restricted cash and investments [Policy Text Block]	Cash Equivalents and Restricted Cash and Cash Equivalents and Investments Cash equivalents consist of funds invested in money market mutual funds, United States Treasury Bills and other investments with a maturity of three months or less when purchased. Cash and cash equivalents exclude amounts where availability is restricted by legal requirements, loan agreements or other contractual provisions. Restricted cash and cash equivalents consist substantially of funds representing escrow accounts for disputes, vendor retention, custodial and nuclear decommissioning funds. Restricted amounts are included in other current assets and other assets on the Consolidated Balance Sheets.
Segment reporting	Segment Information PacifiCorp currently has one segment, which includes its regulated electric utility operations.
MidAmerican Energy Company [Member]
Allowance for Doubtful Accounts [Line Items]
Basis of consolidation and presentation [Policy Text Block]	Basis of Presentation The Statements of Comprehensive Income have been omitted as net income equals comprehensive income for the years ended December 31, 2020, 2019 and 2018.
Use of estimates in preparation of financial statements [Policy Text Block]	Use of Estimates in Preparation of Financial Statements The preparation of the Financial Statements in conformity with accounting principles generally accepted in the United States of America ("GAAP") requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the period. These estimates include, but are not limited to, the effects of regulation; certain assumptions made in accounting for pension and other postretirement benefits; asset retirement obligations ("AROs"); income taxes; unbilled revenue; valuation of certain financial assets and liabilities, including derivative contracts; and accounting for contingencies. Actual results may differ from the estimates used in preparing the Financial Statements.
Accounting for the effects of certain types of regulation [Policy Text Block]	A ccounting for the Effects of Certain Types of Regulation MidAmerican Energy's utility operations are subject to the regulation of the Iowa Utilities Board ("IUB"), the Illinois Commerce Commission ("ICC"), the South Dakota Public Utilities Commission, and the Federal Energy Regulatory Commission ("FERC"). MidAmerican Energy's accounting policies and the accompanying Financial Statements conform to GAAP applicable to rate-regulated enterprises and reflect the effects of the ratemaking process. MidAmerican Energy prepares its financial statements in accordance with authoritative guidance for regulated operations, which recognizes the economic effects of regulation. Accordingly, MidAmerican Energy defers the recognition of certain costs or income if it is probable that, through the ratemaking process, there will be a corresponding increase or decrease in future regulated rates. Regulatory assets and liabilities are established to reflect the impacts of these deferrals, which will be recognized in earnings in the periods the corresponding changes in regulated rates occur. MidAmerican Energy continually evaluates the applicability of the guidance for regulated operations and whether its regulatory assets and liabilities are probable of inclusion in future regulated rates by considering factors such as a change in the regulator's approach to setting rates from cost-based ratemaking to another form of regulation, other regulatory actions or the impact of competition, that could limit MidAmerican Energy's ability to recover its costs. MidAmerican Energy believes the application of the guidance for regulated operations is appropriate, and its existing regulatory assets and liabilities are probable of inclusion in future regulated rates. The evaluation reflects the current political and regulatory climate at both the federal and state levels. If it becomes no longer probable that the deferred costs or income will be included in future regulated rates, the related regulatory assets and liabilities will be written off to net income, returned to customers or re-established as accumulated other comprehensive income (loss) ("AOCI").
Fair value measurement [Policy Text Block]	Fair Value Measurements As defined under GAAP, fair value is the price that would be received to sell an asset or paid to transfer a liability between market participants in the principal market or in the most advantageous market when no principal market exists. Adjustments to transaction prices or quoted market prices may be required in illiquid or disorderly markets in order to estimate fair value. Different valuation techniques may be appropriate under the circumstances to determine the value that would be received to sell an asset or paid to transfer a liability in an orderly transaction. Market participants are assumed to be independent, knowledgeable, able and willing to transact an exchange and not under duress. Nonperformance or credit risk is considered in determining fair value. Considerable judgment may be required in interpreting market data used to develop the estimates of fair value. Accordingly, estimates of fair value presented herein are not necessarily indicative of the amounts that could be realized in a current or future market exchange.
Investments [Policy Text Block]	Investments Fixed Maturity Securities MidAmerican Energy's management determines the appropriate classification of investments in fixed maturity securities at the acquisition date and reevaluates the classification at each balance sheet date. Investments that management does not intend to use or is restricted from using in current operations are presented as noncurrent on the Balance Sheets. Available-for-sale investments are carried at fair value with realized gains and losses, as determined on a specific identification basis, recognized in earnings and unrealized gains and losses recognized in AOCI, net of tax. Realized and unrealized gains and losses on fixed maturity securities in a trust related to the decommissioning of the Quad Cities Generating Station Units 1 and 2 ("Quad Cities Station") are recorded as a net regulatory liability because MidAmerican Energy expects to refund to customers any decommissioning funds in excess of costs for these activities through regulated rates. Trading investments are carried at fair value with changes in fair value recognized in earnings. Held-to-maturity securities are carried at amortized cost, reflecting the ability and intent to hold the securities to maturity. The difference between the original cost and maturity value of a fixed maturity security is amortized to earnings using the interest method. Investments gains and losses arise when investments are sold (as determined on a specific identification basis) or are other-than-temporarily impaired with respect to securities classified as available-for-sale. If the value of a fixed maturity investment declines to below amortized cost and the decline is deemed other than temporary, the amortized cost of the investment is reduced to fair value, with a corresponding charge to earnings. Any resulting impairment loss is recognized in earnings if MidAmerican Energy intends to sell, or expects to be required to sell, the debt security before its amortized cost is recovered. If MidAmerican Energy does not expect to ultimately recover the amortized cost basis even if it does not intend to sell the security, the credit loss component is recognized in earnings and any difference between fair value and the amortized cost basis, net of the credit loss, is reflected in other comprehensive income (loss) ("OCI"). For regulated investments, any impairment charge is offset by the establishment of a regulatory asset to the extent recovery in regulated rates is probable. Equity Securities All changes in fair value of equity securities in a trust related to the decommissioning of nuclear generation assets are recorded as a net regulatory liability since MidAmerican Energy expects to refund to customers any decommissioning funds in excess of costs for these activities through regulated rates.
Allowance for doubtful accounts [Policy Text Block]	Allowance for Credit Losses Trade receivables are primarily short-term in nature with stated collection terms of less than one year from the date of origination and are stated at the outstanding principal amount, net of an estimated allowance for credit losses. The allowance for credit losses is based on MidAmerican Energy's assessment of the collectability of amounts owed to it by its customers. This assessment requires judgment regarding the ability of customers to pay or the outcome of any pending disputes. In measuring the allowance for credit losses for trade receivables, MidAmerican Energy primarily utilizes credit loss history. However, it may adjust the allowance for credit losses to reflect current conditions and reasonable and supportable forecasts that deviate from historical experience. As of December 31, 2020 and 2019, the allowance for credit losses totaled $12 million and $5 million, respectively, and is included in trade receivables, net on the Balance Sheets.
Derivatives [Policy Text Block]	Derivatives MidAmerican Energy employs a number of different derivative contracts, including forwards, futures, options, swaps and other agreements, to manage price risk for electricity, natural gas and other commodities, and interest rate risk. Derivative contracts are recorded on the Balance Sheets as either assets or liabilities and are stated at estimated fair value unless they are designated as normal purchases or normal sales and qualify for the exception afforded by GAAP. Derivative balances reflect offsetting permitted under master netting agreements with counterparties and cash collateral paid or received under such agreements. Cash collateral received from or paid to counterparties to secure derivative contract assets or liabilities in excess of amounts offset is included in other current assets on the Balance Sheets. Commodity derivatives used in normal business operations that are settled by physical delivery, among other criteria, are eligible for and may be designated as normal purchases or normal sales. Normal purchases or normal sales contracts are not marked to market, and settled amounts are recognized as operating revenue or cost of sales on the Statements of Operations.
Inventories [Policy Text Block]	Inventories Inventories consist mainly of materials and supplies, totaling $129 million and $128 million as of December 31, 2020 and 2019, respectively, coal stocks, totaling $119 million and $66 million as of December 31, 2020 and 2019, respectively, and natural gas in storage, totaling $26 million and $28 million as of December 31, 2020 and 2019, respectively. The cost of materials and supplies, coal stocks and fuel oil is determined using the average cost method. The cost of stored natural gas is determined using the last-in-first-out method. With respect to stored natural gas, the replacement cost would be $10 million higher and $2 million lower as of December 31, 2020 and 2019, respectively.
Property, plant and equipment, net - general [Policy Text Block]	Property, Plant and Equipment, Net General Additions to utility plant are recorded at cost. MidAmerican Energy capitalizes all construction-related material, direct labor and contract services, as well as indirect construction costs. Indirect construction costs include debt allowance for funds used during construction ("AFUDC") and equity AFUDC. The cost of additions and betterments are capitalized, while costs incurred that do not improve or extend the useful lives of the related assets are generally expensed. Additionally, MidAmerican Energy has regulatory arrangements in Iowa in which the carrying cost of certain utility plant has been reduced for amounts associated with electric returns on equity exceeding specified thresholds and retail energy benefits associated with certain wind-powered generation. Amounts expensed under these arrangements are included as a component of depreciation and amortization. Depreciation and amortization for MidAmerican Energy's utility operations are computed by applying the composite or straight-line method based on either estimated useful lives or mandated recovery periods as prescribed by its various regulatory authorities. Depreciation studies are completed by MidAmerican Energy to determine the appropriate group lives, net salvage and group depreciation rates. These studies are reviewed and rates are ultimately approved by the applicable regulatory commission. Net salvage includes the estimated future residual values of the assets and any estimated removal costs recovered through approved depreciation rates. Estimated removal costs are recorded as either a cost of removal regulatory liability or an ARO liability on the Balance Sheets, depending on whether the obligation meets the requirements of an ARO. As actual removal costs are incurred, the associated liability is reduced. Generally, when MidAmerican Energy retires or sells a component of utility plant, it charges the original cost, net of any proceeds from the disposition to accumulated depreciation. Any gain or loss on disposals of nonregulated assets is recorded through earnings. Debt and equity AFUDC, which represent the estimated costs of debt and equity funds necessary to finance the construction of its regulated facilities, is capitalized by MidAmerican Energy as a component of utility plant, with offsetting credits to the Statements of Operations. AFUDC is computed based on guidelines set forth by the FERC. After construction is completed, MidAmerican Energy is permitted to earn a return on these costs as a component of the related assets, as well as recover these costs through depreciation expense over the useful lives of the related assets.
Property, plant and equipment, net - asset retirement obligations [Policy Text Block]	Asset Retirement Obligations MidAmerican Energy recognizes AROs when it has a legal obligation to perform decommissioning or removal activities upon retirement of an asset. MidAmerican Energy's AROs are primarily related to decommissioning of the Quad Cities Station and obligations associated with its other generating facilities. The fair value of an ARO liability is recognized in the period in which it is incurred, if a reasonable estimate of fair value can be made, and is added to the carrying amount of the associated asset, which is then depreciated over the remaining useful life of the asset. Subsequent to the initial recognition, the ARO liability is adjusted for any revisions to the original estimate of undiscounted cash flows (with corresponding adjustments to utility plant) and for accretion of the ARO liability due to the passage of time. The difference between the ARO liability, the corresponding ARO asset included in utility plant, net and amounts recovered in rates to satisfy such liabilities is recorded as a regulatory asset or liability.
Property, plant and equipment, net - impairment [Policy Text Block]	Impairment MidAmerican Energy evaluates long-lived assets for impairment, including utility plant, when events or changes in circumstances indicate that the carrying value of such assets may not be recoverable or the assets are being held for sale. Upon the occurrence of a triggering event, the asset is reviewed to assess whether the estimated undiscounted cash flows expected from the use of the asset plus the residual value from the ultimate disposal exceeds the carrying value of the asset. If the carrying value exceeds the estimated recoverable amounts, the asset is written down to the estimated fair value. The impacts of regulation are considered when evaluating the carrying value of regulated assets. For all other assets, any resulting impairment loss is reflected on the Statements of Operations.
Revenue recognition [Policy Text Block]	Revenue Recognition MidAmerican Energy uses a single five-step model to identify and recognize revenue from contracts with customers ("Customer Revenue") upon transfer of control of promised goods or services in an amount that reflects the consideration to which MidAmerican Energy expects to be entitled in exchange for those goods and services. MidAmerican Energy records sales, franchise and excise taxes collected directly from customers and remitted directly to the taxing authorities on a net basis on the Statements of Operations. A majority of MidAmerican Energy's energy revenue is derived from tariff-based sales arrangements approved by various regulatory commissions. These tariff-based revenues are mainly comprised of energy, transmission, distribution and natural gas and have performance obligations to deliver energy products and services to customers which are satisfied over time as energy is delivered or services are provided. Revenue from electric and natural gas customers is recognized as electricity or natural gas is delivered or services are provided. Revenue recognized includes billed and unbilled amounts. As of December 31, 2020 and 2019, unbilled revenue was $95 million and $91 million, respectively, and is included in trade receivables, net on the Balance Sheets. The determination of customer billings is based on a systematic reading of customer meters and applicable rates. At the end of each month, amounts of energy provided to customers since the date of the last meter reading are estimated, and the corresponding unbilled revenue is recorded. Factors that can impact the estimate of unbilled energy include, but are not limited to, seasonal weather patterns, total volumes supplied to the system, line losses and composition of customer classes. Unbilled revenue is reversed in the following month and billed revenue is recorded based on the subsequent meter readings.
Unamortized debt premiums, discounts and financing costs [Policy Text Block]	Unamortized Debt Premiums, Discounts and Issuance Costs Premiums, discounts and issuance costs incurred for the issuance of long-term debt are amortized over the term of the related financing using the effective interest method.
Income taxes [Policy Text Block]	Income Taxes Berkshire Hathaway includes MidAmerican Funding and MidAmerican Energy in its consolidated United States federal and Iowa state income tax returns. MidAmerican Funding's and MidAmerican Energy's provisions for income taxes have been computed on a stand-alone basis. Deferred income tax assets and liabilities are based on differences between the financial statement and income tax basis of assets and liabilities using enacted income tax rates expected to be in effect for the year in which the differences are expected to reverse. Changes in deferred income tax assets and liabilities that are associated with certain property-related basis differences and other various differences that MidAmerican Energy deems probable to be passed on to its customers in most state jurisdictions are charged or credited directly to a regulatory asset or liability and will be included in regulated rates when the temporary differences reverse. Other changes in deferred income tax assets and liabilities are included as a component of income tax expense. Changes in deferred income tax assets and liabilities attributable to changes in enacted income tax rates are charged or credited to income tax expense or a regulatory asset or liability in the period of enactment. Investment tax credits are generally deferred and amortized over the estimated useful lives of the related properties or as prescribed by various regulatory commissions.
Income tax uncertainties [Policy Text Block]	In determining MidAmerican Funding's and MidAmerican Energy's income taxes, management is required to interpret complex income tax laws and regulations, which includes consideration of regulatory implications imposed by MidAmerican Energy's various regulatory commissions. MidAmerican Funding's and MidAmerican Energy's income tax returns are subject to continuous examinations by federal, state and local tax authorities that may give rise to different interpretations of these complex laws and regulations. Due to the nature of the examination process, it generally takes years before these examinations are completed and these matters are resolved. MidAmerican Funding and MidAmerican Energy recognize the tax benefit from an uncertain tax position only if it is more-likely-than-not that the tax position will be sustained on examination by the taxing authorities, based on the technical merits of the position. The tax benefits recognized in the Consolidated Financial Statements from such a position are measured based on the largest benefit that is more-likely-than-not to be realized upon ultimate settlement. Although the ultimate resolution of their federal, state and local income tax examinations is uncertain, each company believes it has made adequate provisions for its income tax positions. The aggregate amount of any additional income tax liabilities that may result from these examinations, if any, is not expected to have a material impact on its consolidated financial results. MidAmerican Funding's and MidAmerican Energy's unrecognized tax benefits are primarily included in taxes accrued and other long-term liabilities on their respective Consolidated Balance Sheets. Estimated interest and penalties, if any, related to uncertain tax positions are included as a component of income tax expense on the Consolidated Statements of Operations.
Cash equivalent and restricted cash and investments [Policy Text Block]	Cash Equivalents and Restricted Cash and Cash Equivalents and Investments Cash equivalents consist of funds invested in money market mutual funds, United States Treasury Bills and other investments with a maturity of three months or less when purchased. Cash and cash equivalents exclude amounts where availability is restricted by legal requirements, loan agreements or other contractual provisions. Restricted amounts are included in other current assets and investments and restricted investments on the Balance Sheets.
MidAmerican Funding, LLC and Subsidiaries [Member]
Allowance for Doubtful Accounts [Line Items]
Basis of consolidation and presentation [Policy Text Block]	Basis of Consolidation and Presentation The Consolidated Financial Statements include the accounts of MidAmerican Funding and its subsidiaries in which it held a controlling financial interest as of the financial statement date. Intercompany accounts and transactions have been eliminated, other than those between rate-regulated operations. The Consolidated Statements of Comprehensive Income have been omitted as net income equals comprehensive income for the years ended December 31, 2020, 2019 and 2018.
Goodwill and Intangible Assets, Goodwill, Policy [Policy Text Block]	Goodwill Goodwill represents the excess of the purchase price over the fair value of identifiable net assets acquired when MidAmerican Funding purchased MHC. MidAmerican Funding evaluates goodwill for impairment at least annually and completed its annual review as of October 31. When evaluating goodwill for impairment, MidAmerican Funding estimates the fair value of its reporting units. If the carrying amount of a reporting unit, including goodwill, exceeds the estimated fair value, then the identifiable assets, including identifiable intangible assets, and liabilities of the reporting unit are estimated at fair value as of the current testing date. The excess of the estimated fair value of the reporting unit over the current estimated fair value of net assets establishes the implied value of goodwill. The excess of the recorded goodwill over the implied goodwill value is charged to earnings as an impairment loss. Significant judgment is required in estimating the fair value of the reporting unit and performing goodwill impairment tests. MidAmerican Funding uses a variety of methods to estimate a reporting unit's fair value, principally discounted projected future net cash flows. Key assumptions used include, but are not limited to, the use of estimated future cash flows; multiples of earnings; and an appropriate discount rate. In estimating future cash flows, MidAmerican Funding incorporates current market information, as well as historical factors. As such, the determination of fair value incorporates significant unobservable inputs. During 2020, 2019 and 2018, MidAmerican Funding did not record any goodwill impairments.
Nevada Power Company [Member]
Allowance for Doubtful Accounts [Line Items]
Basis of consolidation and presentation [Policy Text Block]	Basis of Consolidation and Presentation The Consolidated Financial Statements include the accounts of Nevada Power and its subsidiaries in which it holds a controlling financial interest as of the financial statement date. Intercompany accounts and transactions have been eliminated. The Consolidated Statements of Comprehensive Income have been omitted as net income equals comprehensive income for the years ended December 31, 2020, 2019 and 2018.
Use of estimates in preparation of financial statements [Policy Text Block]	Use of Estimates in Preparation of Financial Statements The preparation of the Consolidated Financial Statements in conformity with accounting principles generally accepted in the United States of America ("GAAP") requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the period. These estimates include, but are not limited to, the effects of regulation; recovery of long-lived assets; certain assumptions made in accounting for pension and other postretirement benefits; asset retirement obligations ("AROs"); income taxes; unbilled revenue; valuation of certain financial assets and liabilities, including derivative contracts; and accounting for contingencies. Actual results may differ from the estimates used in preparing the Consolidated Financial Statements.
Accounting for the effects of certain types of regulation [Policy Text Block]	Accounting for the Effects of Certain Types of Regulation Nevada Power prepares its Consolidated Financial Statements in accordance with authoritative guidance for regulated operations, which recognizes the economic effects of regulation. Accordingly, Nevada Power defers the recognition of certain costs or income if it is probable that, through the ratemaking process, there will be a corresponding increase or decrease in future regulated rates. Regulatory assets and liabilities are established to reflect the impacts of these deferrals, which will be recognized in earnings in the periods the corresponding changes in regulated rates occur. Nevada Power continually evaluates the applicability of the guidance for regulated operations and whether its regulatory assets and liabilities are probable of inclusion in future regulated rates by considering factors such as a change in the regulator's approach to setting rates from cost-based ratemaking to another form of regulation, other regulatory actions or the impact of competition that could limit Nevada Power's ability to recover its costs. Nevada Power believes the application of the guidance for regulated operations is appropriate and its existing regulatory assets and liabilities are probable of inclusion in future regulated rates. The evaluation reflects the current political and regulatory climate at both the federal and state levels. If it becomes no longer probable that the deferred costs or income will be included in future regulated rates, the related regulatory assets and liabilities will be written off to net income, returned to customers or re-established as accumulated other comprehensive income (loss) ("AOCI").
Fair value measurement [Policy Text Block]	Fair Value Measurements As defined under GAAP, fair value is the price that would be received to sell an asset or paid to transfer a liability between market participants in the principal market or in the most advantageous market when no principal market exists. Adjustments to transaction prices or quoted market prices may be required in illiquid or disorderly markets in order to estimate fair value. Different valuation techniques may be appropriate under the circumstances to determine the value that would be received to sell an asset or paid to transfer a liability in an orderly transaction. Market participants are assumed to be independent, knowledgeable, able and willing to transact an exchange and not under duress. Nonperformance or credit risk is considered in determining fair value. Considerable judgment may be required in interpreting market data used to develop the estimates of fair value. Accordingly, estimates of fair value presented herein are not necessarily indicative of the amounts that could be realized in a current or future market exchange.
Allowance for doubtful accounts [Policy Text Block]	Allowance for Credit LossesTrade receivables are primarily short-term in nature with stated collection terms of less than one year from the date of origination and are stated at the outstanding principal amount, net of an estimated allowance for credit losses. The allowance for credit losses is based on Nevada Power's assessment of the collectability of amounts owed to Nevada Power by its customers. This assessment requires judgment regarding the ability of customers to pay or the outcome of any pending disputes. In measuring the allowance for credit losses for trade receivables, Nevada Power primarily utilizes credit loss history. However, Nevada Power may adjust the allowance for credit losses to reflect current conditions and reasonable and supportable forecasts that deviate from historical experience. Nevada Power also has the ability to assess deposits on customers who have delayed payments or who are deemed to be a credit risk.
Derivatives [Policy Text Block]	Derivatives Nevada Power employs a number of different derivative contracts, which may include forwards, futures, options, swaps and other agreements, to manage its commodity price and interest rate risk. Derivative contracts are recorded on the Consolidated Balance Sheets as either assets or liabilities and are stated at estimated fair value unless they are designated as normal purchases or normal sales and qualify for the exception afforded by GAAP. Derivative balances reflect offsetting permitted under master netting agreements with counterparties and cash collateral paid or received under such agreements. Commodity derivatives used in normal business operations that are settled by physical delivery, among other criteria, are eligible for and may be designated as normal purchases or normal sales. Normal purchases or normal sales contracts are not marked‑to‑market and settled amounts are recognized as cost of fuel, energy and capacity on the Consolidated Statements of Operations. For Nevada Power's derivative contracts, the settled amount is generally included in regulated rates. Accordingly, the net unrealized gains and losses associated with interim price movements on contracts that are accounted for as derivatives and probable of inclusion in regulated rates are recorded as regulatory assets and liabilities. For a derivative contract not probable of inclusion in rates, changes in the fair value are recognized in earnings.
Inventories [Policy Text Block]	Inventories Inventories consist mainly of materials and supplies totaling $69 million and $62 million as of December 31, 2020 and 2019. The cost is determined using the average cost method. Materials are charged to inventory when purchased and are expensed or capitalized to construction work in process, as appropriate, when used.
Property, plant and equipment, net - general [Policy Text Block]	Property, Plant and Equipment, Net General Additions to property, plant and equipment are recorded at cost. Nevada Power capitalizes all construction-related material, direct labor and contract services, as well as indirect construction costs. Indirect construction costs include debt allowance for funds used during construction ("AFUDC"), and equity AFUDC, as applicable. The cost of additions and betterments are capitalized, while costs incurred that do not improve or extend the useful lives of the related assets are generally expensed. The cost of repairs and minor replacements are charged to expense when incurred with the exception of costs for generation plant maintenance under certain long-term service agreements. Costs under these agreements are expensed straight-line over the term of the agreements as approved by the Public Utilities Commission of Nevada ("PUCN"). Depreciation and amortization are generally computed by applying the composite or straight-line method based on either estimated useful lives or mandated recovery periods as prescribed by Nevada Power's various regulatory authorities. Depreciation studies are completed by Nevada Power to determine the appropriate group lives, net salvage and group depreciation rates. These studies are reviewed and rates are ultimately approved by the applicable regulatory commission. Net salvage includes the estimated future residual values of the assets and any estimated removal costs recovered through approved depreciation rates. Estimated removal costs are recorded as a non-current regulatory liability on the Consolidated Balance Sheets. As actual removal costs are incurred, the associated liability is reduced. Generally when Nevada Power retires or sells a component of regulated property, plant and equipment depreciated using the composite method, it charges the original cost, net of any proceeds from the disposition, to accumulated depreciation. Any gain or loss on disposals of all other assets is recorded through earnings with the exception of material gains or losses on regulated property, plant and equipment depreciated on a straight-line basis, which is then recorded to a regulatory asset or liability.
Property, plant and equipment, net - asset retirement obligations [Policy Text Block]	Asset Retirement ObligationsNevada Power recognizes AROs when it has a legal obligation to perform decommissioning, reclamation or removal activities upon retirement of an asset. Nevada Power's AROs are primarily associated with its generating facilities. The fair value of an ARO liability is recognized in the period in which it is incurred, if a reasonable estimate of fair value can be made, and is added to the carrying amount of the associated asset, which is then depreciated over the remaining useful life of the asset. Subsequent to the initial recognition, the ARO liability is adjusted for any revisions to the original estimate of undiscounted cash flows (with corresponding adjustments to property, plant and equipment, net) and for accretion of the ARO liability due to the passage of time. The difference between the ARO liability, the corresponding ARO asset included in property, plant and equipment, net and amounts recovered in rates to satisfy such liabilities is recorded as a regulatory asset or liability on the Consolidated Balance Sheets. The costs are not recovered in rates until the work has been completed.
Property, plant and equipment, net - impairment [Policy Text Block]	Impairment of Long-Lived AssetsNevada Power evaluates long-lived assets for impairment, including property, plant and equipment, when events or changes in circumstances indicate that the carrying value of such assets may not be recoverable or the assets are being held for sale. Upon the occurrence of a triggering event, the asset is reviewed to assess whether the estimated undiscounted cash flows expected from the use of the asset plus the residual value from the ultimate disposal exceeds the carrying value of the asset. If the carrying value exceeds the estimated recoverable amounts, the asset is written down to the estimated fair value and any resulting impairment loss is reflected on the Consolidated Statements of Operations. As substantially all property, plant and equipment was used in regulated businesses as of December 31, 2020, the impacts of regulation are considered when evaluating the carrying value of regulated assets.
Lessee, Leases [Policy Text Block]	Leases Lessee Nevada Power has non-cancelable operating leases primarily for land, generating facilities, vehicles and office equipment and finance leases consisting primarily of transmission assets, generating facilities, office space and vehicles. These leases generally require Nevada Power to pay for insurance, taxes and maintenance applicable to the leased property. Given the capital intensive nature of the utility industry, it is common for a portion of lease costs to be capitalized when used during construction or maintenance of assets, in which the associated costs will be capitalized with the corresponding asset and depreciated over the remaining life of that asset. Certain leases contain renewal options for varying periods and escalation clauses for adjusting rent to reflect changes in price indices. Nevada Power does not include options in its lease calculations unless there is a triggering event indicating Nevada Power is reasonably certain to exercise the option. Nevada Power's accounting policy is to not recognize right-of-use assets and lease obligations for leases with contract terms of one year or less and not separate lease components from non-lease components and instead account for each separate lease component and the non-lease components associated with a lease as a single lease component. Leases will be evaluated for impairment in line with Accounting Standards Codification ("ASC") Topic 360, "Property, Plant and Equipment" when a triggering event has occurred that might affect the value and use of the assets being leased. Nevada Power's leases of generating facilities generally are for the long-term purchase of electric energy, also known as power purchase agreements ("PPA"). PPAs are generally signed before or during the early stages of project construction and can yield a lease that has not yet commenced. These agreements are primarily for renewable energy and the payments are considered variable lease payments as they are based on the amount of output. Nevada Power's operating and right-of-use assets are recorded in other assets and the operating lease liabilities are recorded in current and long-term other liabilities accordingly.
Revenue recognition [Policy Text Block]	Revenue Recognition Nevada Power uses a single five-step model to identify and recognize revenue from contracts with customers ("Customer Revenue") upon transfer of control of promised goods or services in an amount that reflects the consideration to which Nevada Power expects to be entitled in exchange for those goods or services. Nevada Power records sales, franchise and excise taxes collected directly from customers and remitted directly to the taxing authorities on a net basis on the Consolidated Statements of Operations. Substantially all of Nevada Power's Customer Revenue is derived from tariff-based sales arrangements approved by various regulatory commissions. These tariff-based revenues are mainly comprised of energy, transmission and distribution and have performance obligations to deliver energy products and services to customers which are satisfied over time as energy is delivered or services are provided. Other revenue consists primarily of amounts not considered Customer Revenue within ASC 606, "Revenue from Contracts with Customers" and revenue recognized in accordance with ASC 842, "Leases." Revenue recognized is equal to what Nevada Power has the right to invoice as it corresponds directly with the value to the customer of Nevada Power's performance to date and includes billed and unbilled amounts. As of December 31, 2020 and 2019, trade receivables, net on the Consolidated Balance Sheets relate substantially to Customer Revenue, including unbilled revenue of $104 million and $109 million, respectively. Payments for amounts billed are generally due from the customer within 30 days of billing. Rates charged for energy products and services are established by regulators or contractual arrangements that establish the transaction price as well as the allocation of price amongst the separate performance obligations. When preliminary regulated rates are permitted to be billed prior to final approval by the applicable regulator, certain revenue collected may be subject to refund and a liability for estimated refunds is accrued. In addition, Nevada Power has recognized contract assets of $8 million and $9 million as of December 31, 2020 and 2019, respectively, due to Nevada Power's performance on certain contracts.
Unamortized debt premiums, discounts and financing costs [Policy Text Block]	Unamortized Debt Premiums, Discounts and Issuance Costs Premiums, discounts and financing costs incurred for the issuance of long-term debt are amortized over the term of the related financing on a straight-line basis.
Income taxes [Policy Text Block]	Income Taxes Berkshire Hathaway includes Nevada Power in its consolidated United States federal income tax return. Consistent with established regulatory practice, Nevada Power's provision for income taxes has been computed on a separate return basis. Deferred income tax assets and liabilities are based on differences between the financial statement and income tax basis of assets and liabilities using enacted income tax rates expected to be in effect for the year in which the differences are expected to reverse. Changes in deferred income tax assets and liabilities that are associated with components of other comprehensive income ("OCI") are charged or credited directly to OCI. Changes in deferred income tax assets and liabilities that are associated with certain property‑related basis differences and other various differences that Nevada Power deems probable to be passed on to its customers are charged or credited directly to a regulatory asset or liability and will be included in regulated rates when the temporary differences reverse. Other changes in deferred income tax assets and liabilities are included as a component of income tax expense. Changes in deferred income tax assets and liabilities attributable to changes in enacted income tax rates are charged or credited to income tax expense or a regulatory asset or liability in the period of enactment. Valuation allowances are established when necessary to reduce deferred income tax assets to the amount that is more-likely-than-not to be realized. Investment tax credits are generally deferred and amortized over the estimated useful lives of the related properties.
Income tax uncertainties [Policy Text Block]	In determining Nevada Power's income taxes, management is required to interpret complex income tax laws and regulations, which includes consideration of regulatory implications imposed by Nevada Power's various regulatory commissions. Nevada Power's income tax returns are subject to continuous examinations by federal, state and local income tax authorities that may give rise to different interpretations of these complex laws and regulations. Due to the nature of the examination process, it generally takes years before these examinations are completed and these matters are resolved. Nevada Power recognizes the tax benefit from an uncertain tax position only if it is more-likely-than-not that the tax position will be sustained on examination by the taxing authorities, based on the technical merits of the position. The tax benefits recognized in the Consolidated Financial Statements from such a position are measured based on the largest benefit that is more-likely-than-not to be realized upon ultimate settlement. Although the ultimate resolution of Nevada Power's federal, state and local income tax examinations is uncertain, Nevada Power believes it has made adequate provisions for these income tax positions. The aggregate amount of any additional income tax liabilities that may result from these examinations, if any, is not expected to have a material impact on Nevada Power's consolidated financial results. Estimated interest and penalties, if any, related to uncertain tax positions are included as a component of income tax expense on the Consolidated Statements of Operations.
Cash equivalent and restricted cash and investments [Policy Text Block]	Cash Equivalents and Restricted Cash and Investments Cash equivalents consist of funds invested in money market mutual funds, United States Treasury Bills and other investments with a maturity of three months or less when purchased. Cash and cash equivalents exclude amounts where availability is restricted by legal requirements, loan agreements or other contractual provisions. Restricted amounts are included in other current assets and other assets on the Consolidated Balance Sheets.
Segment reporting	Segment Information Nevada Power currently has one segment, which includes its regulated electric utility operations.
Sierra Pacific Power Company [Member]
Allowance for Doubtful Accounts [Line Items]
Basis of consolidation and presentation [Policy Text Block]	Basis of Presentation The Statements of Comprehensive Income have been omitted as net income equals comprehensive income for the years ended December 31, 2020, 2019 and 2018.
Use of estimates in preparation of financial statements [Policy Text Block]	Use of Estimates in Preparation of Financial Statements The preparation of the Financial Statements in conformity with accounting principles generally accepted in the United States of America ("GAAP") requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the period. These estimates include, but are not limited to, the effects of regulation; recovery of long-lived assets; certain assumptions made in accounting for pension and other postretirement benefits; asset retirement obligations ("AROs"); income taxes; unbilled revenue; valuation of certain financial assets and liabilities, including derivative contracts; and accounting for contingencies. Actual results may differ from the estimates used in preparing the Financial Statements.
Accounting for the effects of certain types of regulation [Policy Text Block]	Accounting for the Effects of Certain Types of Regulation Sierra Pacific prepares its Financial Statements in accordance with authoritative guidance for regulated operations, which recognizes the economic effects of regulation. Accordingly, Sierra Pacific defers the recognition of certain costs or income if it is probable that, through the ratemaking process, there will be a corresponding increase or decrease in future regulated rates. Regulatory assets and liabilities are established to reflect the impacts of these deferrals, which will be recognized in earnings in the periods the corresponding changes in regulated rates occur.
Fair value measurement [Policy Text Block]	Fair Value Measurements As defined under GAAP, fair value is the price that would be received to sell an asset or paid to transfer a liability between market participants in the principal market or in the most advantageous market when no principal market exists. Adjustments to transaction prices or quoted market prices may be required in illiquid or disorderly markets in order to estimate fair value. Different valuation techniques may be appropriate under the circumstances to determine the value that would be received to sell an asset or paid to transfer a liability in an orderly transaction. Market participants are assumed to be independent, knowledgeable, able and willing to transact an exchange and not under duress. Nonperformance or credit risk is considered in determining fair value. Considerable judgment may be required in interpreting market data used to develop the estimates of fair value. Accordingly, estimates of fair value presented herein are not necessarily indicative of the amounts that could be realized in a current or future market exchange.
Allowance for doubtful accounts [Policy Text Block]	Allowance for Credit Losses Trade receivables are primarily short-term in nature with stated collection terms of less than one year from the date of origination and are stated at the outstanding principal amount, net of an estimated allowance for credit losses. The allowance for credit losses is based on Sierra Pacific's assessment of the collectability of amounts owed to Sierra Pacific by its customers. This assessment requires judgment regarding the ability of customers to pay or the outcome of any pending disputes. In measuring the allowance for credit losses for trade receivables, Sierra Pacific primarily utilizes credit loss history. However, Sierra Pacific may adjust the allowance for credit losses to reflect current conditions and reasonable and supportable forecasts that deviate from historical experience. Sierra Pacific also has the ability to assess deposits on customers who have delayed payments or who are deemed to be a credit risk. The changes in the balance of the allowance for credit losses, which is included in trade receivables, net on the Consolidated Balance Sheets, is summarized as follows for the years ended December 31, (in millions): 2020 2019 2018 Beginning balance $ 2 $ 2 $ 2 Charged to operating costs and expenses, net 2 1 1 Write-offs, net (2) (1) (1) Ending balance $ 2 $ 2 $ 2
Derivatives [Policy Text Block]	Derivatives Sierra Pacific employs a number of different derivative contracts, which may include forwards, futures, options, swaps and other agreements, to manage its commodity price and interest rate risk. Derivative contracts are recorded on the Balance Sheets as either assets or liabilities and are stated at estimated fair value unless they are designated as normal purchases or normal sales and qualify for the exception afforded by GAAP. Derivative balances reflect offsetting permitted under master netting agreements with counterparties and cash collateral paid or received under such agreements. Commodity derivatives used in normal business operations that are settled by physical delivery, among other criteria, are eligible for and may be designated as normal purchases or normal sales. Normal purchases or normal sales contracts are not marked‑to‑market and settled amounts are recognized as cost of fuel, energy and capacity or natural gas purchased for resale on the Statements of Operations. For Sierra Pacific's derivative contracts, the settled amount is generally included in regulated rates. Accordingly, the net unrealized gains and losses associated with interim price movements on contracts that are accounted for as derivatives and probable of inclusion in regulated rates are recorded as regulatory assets and liabilities. For a derivative contract not probable of inclusion in rates, changes in the fair value are recognized in earnings.
Inventories [Policy Text Block]	Inventories Inventories consist mainly of materials and supplies totaling $67 million and $49 million as of December 31, 2020 and 2019, respectively, and fuel, which includes coal stock, stored natural gas and fuel oil, totaling $10 million and $8 million as of December 31, 2020 and 2019, respectively. The cost is determined using the average cost method. Materials are charged to inventory when purchased and are expensed or capitalized to construction work in process, as appropriate, when used. Fuel costs are recovered from retail customers through the base tariff energy rates and deferred energy accounting adjustment charges approved by the Public Utilities Commission of Nevada ("PUCN").
Property, plant and equipment, net - general [Policy Text Block]	Property, Plant and Equipment, Net General Additions to property, plant and equipment are recorded at cost. Sierra Pacific capitalizes all construction-related material, direct labor and contract services, as well as indirect construction costs. Indirect construction costs include debt allowance for funds used during construction ("AFUDC"), and equity AFUDC, as applicable. The cost of additions and betterments are capitalized, while costs incurred that do not improve or extend the useful lives of the related assets are generally expensed. The cost of repairs and minor replacements are charged to expense when incurred with the exception of costs for generation plant maintenance under certain long-term service agreements. Costs under these agreements are expensed straight-line over the term of the agreements as approved by the PUCN. Depreciation and amortization are generally computed by applying the composite or straight-line method based on either estimated useful lives or mandated recovery periods as prescribed by Sierra Pacific's various regulatory authorities. Depreciation studies are completed by Sierra Pacific to determine the appropriate group lives, net salvage and group depreciation rates. These studies are reviewed and rates are ultimately approved by the applicable regulatory commission. Net salvage includes the estimated future residual values of the assets and any estimated removal costs recovered through approved depreciation rates. Estimated removal costs are recorded as a non-current regulatory liability on the Balance Sheets. As actual removal costs are incurred, the associated liability is reduced. Generally when Sierra Pacific retires or sells a component of regulated property, plant and equipment depreciated using the composite method, it charges the original cost, net of any proceeds from the disposition, to accumulated depreciation. Any gain or loss on disposals of all other assets is recorded through earnings with the exception of material gains or losses on regulated property, plant and equipment depreciated on a straight-line basis, which is then recorded to a regulatory asset or liability.
Property, plant and equipment, net - asset retirement obligations [Policy Text Block]	Asset Retirement ObligationsSierra Pacific recognizes AROs when it has a legal obligation to perform decommissioning, reclamation or removal activities upon retirement of an asset. Sierra Pacific's AROs are primarily associated with its generating facilities. The fair value of an ARO liability is recognized in the period in which it is incurred, if a reasonable estimate of fair value can be made, and is added to the carrying amount of the associated asset, which is then depreciated over the remaining useful life of the asset. Subsequent to the initial recognition, the ARO liability is adjusted for any revisions to the original estimate of undiscounted cash flows (with corresponding adjustments to property, plant and equipment, net) and for accretion of the ARO liability due to the passage of time. The difference between the ARO liability, the corresponding ARO asset included in property, plant and equipment, net and amounts recovered in rates to satisfy such liabilities is recorded as a regulatory asset or liability on the Balance Sheets. The costs are not recovered in rates until the work has been completed.
Property, plant and equipment, net - impairment [Policy Text Block]	Impairment of Long-Lived Assets Sierra Pacific evaluates long-lived assets for impairment, including property, plant and equipment, when events or changes in circumstances indicate that the carrying value of such assets may not be recoverable or the assets are being held for sale. Upon the occurrence of a triggering event, the asset is reviewed to assess whether the estimated undiscounted cash flows expected from the use of the asset plus the residual value from the ultimate disposal exceeds the carrying value of the asset. If the carrying value exceeds the estimated recoverable amounts, the asset is written down to the estimated fair value and any resulting impairment loss is reflected on the Statements of Operations. As substantially all property, plant and equipment was used in regulated businesses as of December 31, 2020, the impacts of regulation are considered when evaluating the carrying value of regulated assets.
Lessee, Leases [Policy Text Block]	Leases Lessee Sierra Pacific has non-cancelable operating leases primarily for transmission and delivery assets, generating facilities, vehicles and office equipment and finance leases consisting primarily of transmission assets, generating facilities and vehicles. These leases generally require Sierra Pacific to pay for insurance, taxes and maintenance applicable to the leased property. Given the capital intensive nature of the utility industry, it is common for a portion of lease costs to be capitalized when used during construction or maintenance of assets, in which the associated costs will be capitalized with the corresponding asset and depreciated over the remaining life of that asset. Certain leases contain renewal options for varying periods and escalation clauses for adjusting rent to reflect changes in price indices. Sierra Pacific does not include options in its lease calculations unless there is a triggering event indicating Sierra Pacific is reasonably certain to exercise the option. Sierra Pacific's accounting policy is to not recognize right-of-use assets and lease obligations for leases with contract terms of one year or less and not separate lease components from non-lease components and instead account for each separate lease component and the non-lease components associated with a lease as a single lease component. Leases will be evaluated for impairment in line with Accounting Standards Codification ("ASC") Topic 360, "Property, Plant and Equipment" when a triggering event has occurred that might affect the value and use of the assets being leased. Sierra Pacific's leases of generating facilities generally are for the long-term purchase of electric energy, also known as power purchase agreements ("PPA"). PPAs are generally signed before or during the early stages of project construction and can yield a lease that has not yet commenced. These agreements are primarily for renewable energy and the payments are considered variable lease payments as they are based on the amount of output. Sierra Pacific's operating and finance right-of-use assets are recorded in other assets and the operating and current finance lease liabilities are recorded in current and long-term other liabilities accordingly.
Revenue recognition [Policy Text Block]	Revenue Recognition Sierra Pacific uses a single five-step model to identify and recognize revenue from contracts with customers ("Customer Revenue") upon transfer of control of promised goods or services in an amount that reflects the consideration to which Sierra Pacific expects to be entitled in exchange for those goods or services. Sierra Pacific records sales, franchise and excise taxes collected directly from customers and remitted directly to the taxing authorities on a net basis on the Statements of Operations. Substantially all of Sierra Pacific's Customer Revenue is derived from tariff-based sales arrangements approved by various regulatory commissions. These tariff-based revenues are mainly comprised of energy, transmission, distribution and natural gas and have performance obligations to deliver energy products and services to customers which are satisfied over time as energy is delivered or services are provided. Other revenue consists primarily of revenue recognized in accordance with ASC 842, "Leases" and amounts not considered Customer Revenue within ASC 606, "Revenue from Contracts with Customers."
Unamortized debt premiums, discounts and financing costs [Policy Text Block]	Unamortized Debt Premiums, Discounts and Issuance Costs Premiums, discounts and financing costs incurred for the issuance of long-term debt are amortized over the term of the related financing on a straight-line basis.
Income taxes [Policy Text Block]	Income Taxes Berkshire Hathaway includes Sierra Pacific in its consolidated United States federal income tax return. Consistent with established regulatory practice, Sierra Pacific's provision for income taxes has been computed on a separate return basis. Deferred income tax assets and liabilities are based on differences between the financial statement and income tax basis of assets and liabilities using enacted income tax rates expected to be in effect for the year in which the differences are expected to reverse. Changes in deferred income tax assets and liabilities that are associated with components of other comprehensive income ("OCI") are charged or credited directly to OCI. Changes in deferred income tax assets and liabilities that are associated with certain property-related basis differences and other various differences that Sierra Pacific deems probable to be passed on to its customers are charged or credited directly to a regulatory asset or liability and will be included in regulated rates when the temporary differences reverse. Other changes in deferred income tax assets and liabilities are included as a component of income tax expense. Changes in deferred income tax assets and liabilities attributable to changes in enacted income tax rates are charged or credited to income tax expense or a regulatory asset or liability in the period of enactment. Valuation allowances are established when necessary to reduce deferred income tax assets to the amount that is more-likely-than-not to be realized. Investment tax credits are generally deferred and amortized over the estimated useful lives of the related properties.
Income tax uncertainties [Policy Text Block]	In determining Sierra Pacific's income taxes, management is required to interpret complex income tax laws and regulations, which includes consideration of regulatory implications imposed by Sierra Pacific's various regulatory commissions. Sierra Pacific's income tax returns are subject to continuous examinations by federal, state and local income tax authorities that may give rise to different interpretations of these complex laws and regulations. Due to the nature of the examination process, it generally takes years before these examinations are completed and these matters are resolved. Sierra Pacific recognizes the tax benefit from an uncertain tax position only if it is more-likely-than-not that the tax position will be sustained on examination by the taxing authorities, based on the technical merits of the position. The tax benefits recognized in the Financial Statements from such a position are measured based on the largest benefit that is more-likely-than-not to be realized upon ultimate settlement. Although the ultimate resolution of Sierra Pacific's federal, state and local income tax examinations is uncertain, Sierra Pacific believes it has made adequate provisions for these income tax positions. The aggregate amount of any additional income tax liabilities that may result from these examinations, if any, is not expected to have a material impact on Sierra Pacific's financial results. Estimated interest and penalties, if any, related to uncertain tax positions are included as a component of income tax expense on the Statements of Operations.
Cash equivalent and restricted cash and investments [Policy Text Block]	Cash Equivalents and Restricted Cash and Investments Cash equivalents consist of funds invested in money market mutual funds, United States Treasury Bills and other investments with a maturity of three months or less when purchased. Cash and cash equivalents exclude amounts where availability is restricted by legal requirements, loan agreements or other contractual provisions. Restricted amounts are included in other current assets and other assets on the Balance Sheets.
Eastern Energy Gas Holdings, LLC [Member]
Allowance for Doubtful Accounts [Line Items]
Basis of consolidation and presentation [Policy Text Block]	Basis of Consolidation and Presentation The Consolidated Financial Statements include the accounts of Eastern Energy Gas and its subsidiaries in which it holds a controlling financial interest as of the financial statement date. Intercompany accounts and transactions have been eliminated. Certain amounts in Eastern Energy Gas' 2019 and 2018 Consolidated Financial Statements and Notes have been reclassified to conform to the 2020 presentation for comparative purposes; however, such reclassifications did not affect Eastern Energy Gas' net income, total assets, liabilities, equity or cash flows.
Use of estimates in preparation of financial statements [Policy Text Block]	Use of Estimates in Preparation of Financial Statements The preparation of the Consolidated Financial Statements in conformity with accounting principles generally accepted in the United States of America ("GAAP") requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the period. These estimates include, but are not limited to, the effects of regulation; impairment of goodwill; recovery of long-lived assets; certain assumptions made in accounting for pension and other postretirement benefits; asset retirement obligations ("AROs"); income taxes; unbilled revenue; valuation of certain financial assets and liabilities, including derivative contracts; and accounting for contingencies. Actual results may differ from the estimates used in preparing the Consolidated Financial Statements.
Accounting for the effects of certain types of regulation [Policy Text Block]	Accounting for the Effects of Certain Types of Regulation Eastern Energy Gas prepares its Consolidated Financial Statements in accordance with authoritative guidance for regulated operations, which recognizes the economic effects of regulation. Accordingly, Eastern Energy Gas defers the recognition of certain costs or income if it is probable that, through the ratemaking process, there will be a corresponding increase or decrease in future regulated rates. Regulatory assets and liabilities are established to reflect the impacts of these deferrals, which will be recognized in earnings in the periods the corresponding changes in regulated rates occur. Eastern Energy Gas continually evaluates the applicability of the guidance for regulated operations and whether its regulatory assets and liabilities are probable of inclusion in future regulated rates by considering factors such as a change in the regulator's approach to setting rates from cost-based ratemaking to another form of regulation, other regulatory actions or the impact of competition that could limit Eastern Energy Gas' ability to recover its costs. Eastern Energy Gas believes the application of the guidance for regulated operations is appropriate and its existing regulatory assets and liabilities are probable of inclusion in future regulated rates. The evaluation reflects the current political and regulatory climate at the federal and state levels. If it becomes no longer probable that the deferred costs or income will be included in future regulated rates, the related regulatory assets and liabilities will be recognized in net income, returned to customers or re-established as accumulated other comprehensive income (loss) ("AOCI").
Fair value measurement [Policy Text Block]	Fair Value Measurements As defined under GAAP, fair value is the price that would be received to sell an asset or paid to transfer a liability between market participants in the principal market or in the most advantageous market when no principal market exists. Adjustments to transaction prices or quoted market prices may be required in illiquid or disorderly markets in order to estimate fair value. Alternative valuation techniques may be appropriate under the circumstances to determine the value that would be received to sell an asset or paid to transfer a liability in an orderly transaction. Market participants are assumed to be independent, knowledgeable, able and willing to transact an exchange and not under duress. Nonperformance or credit risk is considered in determining fair value. Considerable judgment may be required in interpreting market data used to develop the estimates of fair value. Accordingly, estimates of fair value presented herein are not necessarily indicative of the amounts that could be realized in a current or future market exchange.
Cash and Cash Equivalents, Policy [Policy Text Block]	Cash Equivalents and Restricted Cash and Cash Equivalents and Investments Cash equivalents consist of funds invested in money market mutual funds, United States Treasury Bills and other investments with a maturity of three months or less when purchased. Cash and cash equivalents exclude amounts where availability is restricted by legal requirements, loan agreements or other contractual provisions. Restricted amounts are included in restricted cash and cash equivalents on the Consolidated Balance Sheets.
Investments [Policy Text Block]	Investments Eastern Energy Gas utilizes the equity method of accounting with respect to investments when it possesses the ability to exercise significant influence, but not control, over the operating and financial policies of the investee. The ability to exercise significant influence is presumed when the investor possesses more than 20% of the voting interests of the investee. This presumption may be overcome based on specific facts and circumstances that demonstrate the ability to exercise significant influence is restricted. In applying the equity method, Eastern Energy Gas records the investment at cost and subsequently increases or decreases the carrying value of the investment by Eastern Energy Gas' share of the net earnings or losses and other comprehensive income ("OCI") of the investee. Eastern Energy Gas records dividends or other equity distributions as reductions in the carrying value of the investment. Equity investments are presented on the Consolidated Balance Sheets.
Allowance for doubtful accounts [Policy Text Block]	Allowance for Credit LossesTrade receivables are primarily short-term in nature with stated collection terms of less than one year from the date of origination and are stated at the outstanding principal amount, net of an estimated allowance for credit losses. The allowance for credit losses is based on Eastern Energy Gas' assessment of the collectability of amounts owed to Eastern Energy Gas by its customers. This assessment requires judgment regarding the ability of customers to pay or the outcome of any pending disputes. In measuring the allowance for credit losses for trade receivables, Eastern Energy Gas primarily utilizes credit loss history. However, Eastern Energy Gas may adjust the allowance for credit losses to reflect current conditions and reasonable and supportable forecasts that deviate from historical experience.
Derivatives [Policy Text Block]	Derivatives Eastern Energy Gas employs a number of different derivative contracts, which may include forwards, futures, options, swaps and other agreements, to manage its commodity price, interest rate, and foreign currency exchange rate risk. Derivative contracts are recorded on the Consolidated Balance Sheets as either assets or liabilities and are stated at estimated fair value unless they are designated as normal purchases or normal sales and qualify for the exception afforded by GAAP. Derivative balances reflect offsetting permitted under master netting agreements with counterparties and cash collateral paid or received under such agreements. Cash collateral received from or paid to counterparties to secure derivative contract assets or liabilities in excess of amounts offset is included in other current assets on the Consolidated Balance Sheets. Commodity derivatives used in normal business operations that are settled by physical delivery, among other criteria, are eligible for and may be designated as normal purchases or normal sales. Normal purchases or normal sales contracts are not marked-to-market and settled amounts are recognized as operating revenue or cost of sales on the Consolidated Statements of Operations. For Eastern Energy Gas' derivatives not designated as hedging contracts, unrealized gains and losses are recognized on the Consolidated Statements of Operations as operating revenue for derivatives related to natural gas sales contracts; and other, net for interest rate swap derivatives. For Eastern Energy Gas' derivatives designated as hedging contracts, Eastern Energy Gas formally assesses, at inception and thereafter, whether the hedging contract is highly effective in offsetting changes in the hedged item. Eastern Energy Gas formally documents hedging activity by transaction type and risk management strategy. For derivative instruments that are accounted for as cash flow hedges or fair value hedges, the cash flows from the derivatives and from the related hedged items are classified in operating cash flows. Changes in the estimated fair value of a derivative contract designated and qualified as a cash flow hedge, to the extent effective, are included on the Consolidated Statements of Changes in Equity as AOCI, net of tax, until the contract settles and the hedged item is recognized in earnings. Eastern Energy Gas discontinues hedge accounting prospectively when it has determined that a derivative contract no longer qualifies as an effective hedge, or when it is no longer probable that the hedged forecasted transaction will occur. When hedge accounting is discontinued because the derivative contract no longer qualifies as an effective hedge, future changes in the estimated fair value of the derivative contract are charged to earnings. Gains and losses related to discontinued hedges that were previously recorded in AOCI will remain in AOCI until the contract settles and the hedged item is recognized in earnings, unless it becomes probable that the hedged forecasted transaction will not occur at which time associated deferred amounts in AOCI are immediately recognized in earnings.
Inventories [Policy Text Block]	Inventories Inventories consist mainly of materials and supplies and are determined using the average cost method.
Property, plant and equipment, net - general [Policy Text Block]	Property, Plant and Equipment, Net General Additions to property, plant and equipment are recorded at cost. Eastern Energy Gas capitalizes all construction-related materials, direct labor and contract services, as well as indirect construction costs. Indirect construction costs include capitalized interest, including debt allowance for funds used during construction ("AFUDC"), and equity AFUDC, as applicable. The cost of additions and betterments are capitalized, while costs incurred that do not improve or extend the useful lives of the related assets are generally expensed. Depreciation and amortization are generally computed by applying the composite or straight-line method based on estimated useful lives. Depreciation studies are completed by Eastern Energy Gas to determine the appropriate group lives, net salvage and group depreciation rates. These studies are reviewed and rates are ultimately approved by the FERC. Net salvage includes the estimated future residual values of the assets and any estimated removal costs recovered through approved depreciation rates. Estimated removal costs are recorded as either a cost of removal regulatory liability or an ARO liability on the Consolidated Balance Sheets, depending on whether the obligation meets the requirements of an ARO. As actual removal costs are incurred, the associated liability is reduced. Generally when Eastern Energy Gas retires or sells a component of regulated property, plant and equipment, it charges the original cost, net of any proceeds from the disposition, to accumulated depreciation. Any gain or loss on disposals of all other assets is recorded through earnings.
Property, plant and equipment, net - asset retirement obligations [Policy Text Block]	Asset Retirement Obligations Eastern Energy Gas recognizes AROs when it has a legal obligation to perform decommissioning, reclamation or removal activities upon retirement of an asset. Eastern Energy Gas' AROs are primarily related to the obligations associated with its natural gas pipeline and storage well assets. The fair value of an ARO liability is recognized in the period in which it is incurred, if a reasonable estimate of fair value can be made, and is added to the carrying amount of the associated asset, which is then depreciated over the remaining useful life of the asset. Subsequent to the initial recognition, the ARO liability is adjusted for any revisions to the original estimate of undiscounted cash flows (with corresponding adjustments to property, plant and equipment, net) and for accretion of the ARO liability due to the passage of time. For Eastern Energy Gas, the difference between the ARO liability, the corresponding ARO asset included in property, plant and equipment, net and amounts recovered in rates to satisfy such liabilities is recorded as a regulatory asset or liability.
Property, plant and equipment, net - impairment [Policy Text Block]	Impairment of Long-Lived AssetsEastern Energy Gas evaluates long-lived assets for impairment, including property, plant and equipment, when events or changes in circumstances indicate that the carrying value of such assets may not be recoverable or the assets are being held for sale. Upon the occurrence of a triggering event, the asset is reviewed to assess whether the estimated undiscounted cash flows expected from the use of the asset plus the residual value from the ultimate disposal exceeds the carrying value of the asset. If the carrying value exceeds the estimated recoverable amounts, the asset is written down to the estimated fair value and any resulting impairment loss is reflected on the Consolidated Statements of Operations. The impacts of regulation are considered when evaluating the carrying value of regulated assets.
Lessee, Leases [Policy Text Block]	Leases Eastern Energy Gas has non-cancelable operating leases primarily for office space, office equipment and land and finance leases consisting primarily of natural gas pipeline facilities and vehicles. These leases generally require Eastern Energy Gas to pay for insurance, taxes and maintenance applicable to the leased property. Given the capital intensive nature of the utility industry, it is common for a portion of lease costs to be capitalized when used during construction or maintenance of assets, in which the associated costs will be capitalized with the corresponding asset and depreciated over the remaining life of that asset. Certain leases contain renewal options for varying periods and escalation clauses for adjusting rent to reflect changes in price indices. Eastern Energy Gas does not include options in its lease calculations unless there is a triggering event indicating Eastern Energy Gas is reasonably certain to exercise the option. Eastern Energy Gas' accounting policy is to not recognize right-of-use assets and lease obligations for leases with contract terms of one year or less and not separate lease components from non-lease components and instead account for each separate lease component and the non-lease components associated with a lease as a single lease component. Leases will be evaluated for impairment in line with Accounting Standards Codification ("ASC") 360, "Property, Plant and Equipment" when a triggering event has occurred that might affect the value and use of the assets being leased. Eastern Energy Gas' operating and finance right-of-use assets are recorded in other assets and the operating and finance lease liabilities are recorded in current and long-term other liabilities accordingly.
Revenue recognition [Policy Text Block]	Revenue Recognition Eastern Energy Gas uses a single five-step model to identify and recognize revenue from contracts with customers ("Customer Revenue") upon transfer of control of promised goods or services in an amount that reflects the consideration to which Eastern Energy Gas expects to be entitled in exchange for those goods or services. Eastern Energy Gas records sales and excise taxes collected directly from customers and remitted directly to the taxing authorities on a net basis on the Consolidated Statements of Operations. A majority of Eastern Energy Gas' energy revenue is derived from tariff-based sales arrangements approved by the FERC. These tariff-based revenues are mainly comprised of natural gas transmission and storage services and have performance obligations which are satisfied over time as services are provided. Eastern Energy Gas' revenue that is nonregulated primarily relates to LNG terminalling services.
Unamortized debt premiums, discounts and financing costs [Policy Text Block]	Unamortized Debt Premiums, Discounts and Debt Issuance Costs Premiums, discounts and debt issuance costs incurred for the issuance of long-term debt are amortized over the term of the related financing using the effective interest method.
Income taxes [Policy Text Block]	Income Taxes Prior to the GT&S Transaction, DEI included Eastern Energy Gas in its consolidated United States federal income tax return. Subsequent to the GT&S Transaction, Berkshire Hathaway includes Eastern Energy Gas in its consolidated United States federal income tax return. Consistent with established regulatory practice, Eastern Energy Gas' provision for income taxes has been computed on a stand-alone return basis. Deferred income tax assets and liabilities are based on differences between the financial statement and income tax basis of assets and liabilities using enacted income tax rates expected to be in effect for the year in which the differences are expected to reverse. Changes in deferred income tax assets and liabilities associated with components of OCI are charged or credited directly to OCI. Changes in deferred income tax assets and liabilities associated with certain property-related basis differences and other various differences that Eastern Energy Gas' regulated businesses deems probable to be passed on to its customers are charged or credited directly to a regulatory asset or liability and will be included in regulated rates when the temporary differences reverse. Other changes in deferred income tax assets and liabilities are included as a component of income tax expense. Changes in deferred income tax assets and liabilities attributable to changes in enacted income tax rates are charged or credited to income tax expense or a regulatory asset or liability in the period of enactment. Valuation allowances are established when necessary to reduce deferred income tax assets to the amount that is more-likely-than-not to be realized. In determining Eastern Energy Gas' income taxes, management is required to interpret complex income tax laws and regulations, which includes consideration of regulatory implications imposed by the FERC. Eastern Energy Gas' income tax returns are subject to continuous examinations by federal, state and local income tax authorities that may give rise to different interpretations of these complex laws and regulations. Due to the nature of the examination process, it generally takes years before these examinations are completed and these matters are resolved. Eastern Energy Gas recognizes the tax benefit from an uncertain tax position only if it is more-likely-than-not that the tax position will be sustained on examination by the taxing authorities, based on the technical merits of the position. The tax benefits recognized in the Consolidated Financial Statements from such a position are measured based on the largest benefit that is more-likely-than-not to be realized upon ultimate settlement. Although the ultimate resolution of Eastern Energy Gas' federal, state and local income tax examinations is uncertain, Eastern Energy Gas believes it has made adequate provisions for these income tax positions. The aggregate amount of any additional income tax liabilities that may result from these examinations, if any, is not expected to have a material impact on Eastern Energy Gas' consolidated financial results. Estimated interest and penalties, if any, related to uncertain tax positions are included as a component of income tax expense on the Consolidated Statements of Operations.
Goodwill and Intangible Assets, Goodwill, Policy [Policy Text Block]	Goodwill Goodwill represents the excess of the purchase price over the fair value of identifiable net assets acquired in business combinations. Eastern Energy Gas evaluates goodwill for impairment at least annually. Prior to the GT&S Transaction, Eastern Energy Gas evaluated goodwill for impairment as of April 1. As a result of the GT&S Transaction, Eastern Energy Gas will complete its annual reviews as of October 31 to align with BHE's policy. When evaluating goodwill for impairment, Eastern Energy Gas estimates the fair value of its reporting units. If the carrying amount of a reporting unit, including goodwill, exceeds the estimated fair value, then the identifiable assets, including identifiable intangible assets, and liabilities of the reporting unit are estimated at fair value as of the current testing date. The excess of the estimated fair value of the reporting unit over the current estimated fair value of net assets establishes the implied value of goodwill. The excess of the recorded goodwill over the implied goodwill value is charged to earnings as an impairment loss. Significant judgment is required in estimating the fair value of the reporting unit and performing goodwill impairment tests. Eastern Energy Gas uses a variety of methods to estimate a reporting unit's fair value, principally discounted projected future net cash flows. Key assumptions used include, but are not limited to, the use of estimated future cash flows; multiples of earnings; and an appropriate discount rate. In estimating future cash flows, Eastern Energy Gas incorporates current market information, as well as historical factors. As such, the determination of fair value incorporates significant unobservable inputs. During 2020, 2019 and 2018, Eastern Energy Gas did not record any goodwill impairments. Eastern Energy Gas records goodwill adjustments for (a) the tax benefit associated with the excess of tax-deductible goodwill over the reported amount of goodwill and (b) changes to the purchase price allocation prior to the end of the measurement period, which is not to exceed one year from the acquisition date.
Gas Imbalances [Policy Text Block]	Gas Imbalances Natural gas imbalances occur when the physical amount of natural gas delivered from, or received by, a pipeline system or storage facility differs from the contractual amount of natural gas delivered or received. Eastern Energy Gas values these imbalances due to, or from, shippers and operators at an appropriate index price at period end, subject to the terms of its tariff for regulated entities. Imbalances are primarily settled in-kind. Imbalances due to Eastern Energy Gas from other parties are reported in other current assets and imbalances that Eastern Energy Gas owes to other parties are reported in other current liabilities on the Consolidated Balance Sheets.

Summary of Significant Accoun_3

Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2020
PacifiCorp [Member]
Allowance for Doubtful Accounts [Line Items]
Public Utility Property, Plant, and Equipment (NPC, SPPC, PacifiCorp) [Table Text Block]	Property, plant and equipment, net consists of the following as of December 31 (in millions): Depreciable Life 2020 2019 Utility Plant: Generation 14 - 67 years $ 12,861 $ 12,509 Transmission 58 - 75 years 7,632 6,482 Distribution 20 - 70 years 7,660 7,307 Intangible plant (1) 5 - 75 years 1,054 1,016 Other 5 - 60 years 1,510 1,449 Utility plant in service 30,717 28,763 Accumulated depreciation and amortization (9,838) (9,803) Utility plant in service, net 20,879 18,960 Other non-regulated, net of accumulated depreciation and amortization 14 - 95 years 9 10 Plant, net 20,888 18,970 Construction work-in-progress 1,542 2,003 Property, plant and equipment, net $ 22,430 $ 20,973 (1) Computer software costs included in intangible plant are initially assigned a depreciable life of 5 to 10 years.
MidAmerican Energy Company [Member]
Allowance for Doubtful Accounts [Line Items]
Public Utility Property, Plant, and Equipment (NPC, SPPC, PacifiCorp) [Table Text Block]	Property, plant and equipment, net consists of the following as of December 31 (in millions): Depreciable Life 2020 2019 Utility plant in service, net: Generation 20-70 years $ 16,980 $ 15,687 Transmission 52-75 years 2,365 2,124 Electric distribution 20-75 years 4,369 4,095 Natural gas distribution 29-75 years 1,955 1,820 Utility plant in service 25,669 23,726 Accumulated depreciation and amortization (6,902) (6,139) Utility plant in service, net 18,767 17,587 Nonregulated property, net: Nonregulated property gross 20-50 years 7 7 Accumulated depreciation and amortization (1) (1) Nonregulated property, net 6 6 18,773 17,593 Construction work-in-progress 506 782 Property, plant and equipment, net $ 19,279 $ 18,375
Nevada Power Company [Member]
Allowance for Doubtful Accounts [Line Items]
Accounts Receivable, Allowance for Credit Loss	The changes in the balance of the allowance for credit losses, which is included in trade receivables, net on the Consolidated Balance Sheets, is summarized as follows for the years ended December 31, (in millions): 2020 2019 2018 Beginning balance $ 15 $ 16 $ 16 Charged to operating costs and expenses, net 13 12 15 Write-offs, net (9) (13) (15) Ending balance $ 19 $ 15 $ 16
Public Utility Property, Plant, and Equipment (NPC, SPPC, PacifiCorp) [Table Text Block]	Property, plant and equipment, net consists of the following as of December 31 (in millions): Depreciable Life 2020 2019 Utility plant: Generation 30 - 55 years $ 3,690 $ 3,541 Transmission 45 - 70 years 1,468 1,444 Distribution 20 - 65 years 3,771 3,567 General and intangible plant 5 - 65 years 791 741 Utility plant 9,720 9,293 Accumulated depreciation and amortization (3,162) (2,951) Utility plant, net 6,558 6,342 Other non-regulated, net of accumulated depreciation and amortization 45 years 1 1 Plant, net 6,559 6,343 Construction work-in-progress 142 195 Property, plant and equipment, net $ 6,701 $ 6,538
Sierra Pacific Power Company [Member]
Allowance for Doubtful Accounts [Line Items]
Public Utility Property, Plant, and Equipment (NPC, SPPC, PacifiCorp) [Table Text Block]	Property, plant and equipment, net consists of the following as of December 31 (in millions): Depreciable Life 2020 2019 Utility plant: Electric generation 25 - 60 years $ 1,130 $ 1,133 Electric transmission 50 - 100 years 908 840 Electric distribution 20 - 100 years 1,754 1,669 Electric general and intangible plant 5 - 70 years 189 178 Natural gas distribution 35 - 70 years 429 417 Natural gas general and intangible plant 5 - 70 years 15 14 Common general 5 - 70 years 355 338 Utility plant 4,780 4,589 Accumulated depreciation and amortization (1,755) (1,629) Utility plant, net 3,025 2,960 Other non-regulated, net of accumulated depreciation and amortization 70 years 2 2 Plant, net 3,027 2,962 Construction work-in-progress 137 113 Property, plant and equipment, net $ 3,164 $ 3,075
Eastern Energy Gas Holdings, LLC [Member]
Allowance for Doubtful Accounts [Line Items]
Accounts Receivable, Allowance for Credit Loss	The changes in the balance of the allowance for credit losses, which is included in trades receivables, net on the Consolidated Balance Sheets, is summarized as follows for the years ended December 31, (in millions): 2020 2019 2018 Beginning balance $ 2 $ — $ — Charged to operating costs and expenses, net 4 2 — Write-offs, net (1) — — Ending balance $ 5 $ 2 $ —

Business Acquisitions (Tables)

Business Acquisitions (Tables)	12 Months Ended
	Dec. 31, 2020
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed	The following table summarizes the preliminary fair values of the assets acquired and liabilities assumed as of the acquisition date (in millions): Fair Value Current assets, including cash and cash equivalents of $104 $ 569 Property, plant and equipment 9,254 Goodwill 1,732 Regulatory assets 108 Deferred income taxes 275 Other long-term assets 1,424 Total assets 13,362 Current liabilities, including current portion of long-term debt of $1,200 1,567 Long-term debt, less current portion 4,415 Regulatory liabilities 661 Other long-term liabilities 289 Total liabilities 6,932 Noncontrolling interest 3,916 Net assets acquired $ 2,514
Business Acquisition, Pro Forma Information	Pro Forma Financial Information The following unaudited pro forma financial information reflects the consolidated results of operations of BHE and the amortization of the purchase price adjustments assuming the acquisition had taken place on January 1, 2019, excluding non-recurring transaction costs incurred by BHE during 2020 (in millions): 2020 2019 Operating revenue $ 22,581 $ 21,979 Net income attributable to BHE shareholders $ 6,800 $ 3,271
Eastern Energy Gas Holdings, LLC [Member]
Disposal Groups, Including Discontinued Operations	The following table represents selected information regarding the results of operations of East Ohio, which are reported as discontinued operations in Eastern Energy Gas' Consolidated Statements of Operations (in millions): Period Ended Year Ended Operating revenue $ 594 $ 729 Depreciation and amortization 73 76 Other operating expenses 399 444 Other income (expense), net 28 35 Income tax expense 26 53 Net income from discontinued operations $ 124 $ 191 Capital expenditures and significant noncash items relating to East Ohio included the following (in millions): Period Ended Year Ended Capital expenditures $ 299 $ 352 Significant noncash items: Charge related to a voluntary retirement program 20 — Accrued capital expenditures 2 5 The following table represents selected information regarding the results of operations of EGP, which are reported as discontinued operations in Eastern Energy Gas' Consolidated Statements of Operations (in millions): Period Ended Year Ended Operating revenue $ 125 $ 220 Depreciation and amortization 4 15 Other operating expenses 97 425 Income tax expense (benefit) 7 (53) Net income (loss) from discontinued operations $ 17 $ (167) Capital expenditures and significant noncash items of EGP included the following (in millions): Period Ended Year Ended Capital expenditures $ 11 $ 6 Significant noncash items: Impairment of assets — (219)

Business Acquisitions and Dis_2

Business Acquisitions and Dispositions (Tables)	12 Months Ended
	Dec. 31, 2020
Eastern Energy Gas Holdings, LLC [Member]
Disposal Groups, Including Discontinued Operations	The following table represents selected information regarding the results of operations of East Ohio, which are reported as discontinued operations in Eastern Energy Gas' Consolidated Statements of Operations (in millions): Period Ended Year Ended Operating revenue $ 594 $ 729 Depreciation and amortization 73 76 Other operating expenses 399 444 Other income (expense), net 28 35 Income tax expense 26 53 Net income from discontinued operations $ 124 $ 191 Capital expenditures and significant noncash items relating to East Ohio included the following (in millions): Period Ended Year Ended Capital expenditures $ 299 $ 352 Significant noncash items: Charge related to a voluntary retirement program 20 — Accrued capital expenditures 2 5 The following table represents selected information regarding the results of operations of EGP, which are reported as discontinued operations in Eastern Energy Gas' Consolidated Statements of Operations (in millions): Period Ended Year Ended Operating revenue $ 125 $ 220 Depreciation and amortization 4 15 Other operating expenses 97 425 Income tax expense (benefit) 7 (53) Net income (loss) from discontinued operations $ 17 $ (167) Capital expenditures and significant noncash items of EGP included the following (in millions): Period Ended Year Ended Capital expenditures $ 11 $ 6 Significant noncash items: Impairment of assets — (219)

Property, Plant and Equipment_2

Property, Plant and Equipment, Net (Tables)	12 Months Ended
	Dec. 31, 2020
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment [Table Text Block]	Property, plant and equipment, net consists of the following as of December 31 (in millions): Depreciable Life 2020 2019 Regulated assets: Utility generation, transmission and distribution systems 5-80 years $ 86,730 $ 81,127 Interstate natural gas pipeline assets 3-80 years 16,667 8,165 103,397 89,292 Accumulated depreciation and amortization (30,662) (26,353) Regulated assets, net 72,735 62,939 Nonregulated assets: Independent power plants 5-30 years 7,012 6,983 Other assets 3-40 years 5,659 1,834 12,671 8,817 Accumulated depreciation and amortization (2,586) (2,183) Nonregulated assets, net 10,085 6,634 Net operating assets 82,820 69,573 Construction work-in-progress 3,308 3,732 Property, plant and equipment, net $ 86,128 $ 73,305
MidAmerican Energy Company [Member]
Property, Plant and Equipment [Line Items]
Public Utility Property, Plant, and Equipment (NPC, SPPC, PacifiCorp) [Table Text Block]	Property, plant and equipment, net consists of the following as of December 31 (in millions): Depreciable Life 2020 2019 Utility plant in service, net: Generation 20-70 years $ 16,980 $ 15,687 Transmission 52-75 years 2,365 2,124 Electric distribution 20-75 years 4,369 4,095 Natural gas distribution 29-75 years 1,955 1,820 Utility plant in service 25,669 23,726 Accumulated depreciation and amortization (6,902) (6,139) Utility plant in service, net 18,767 17,587 Nonregulated property, net: Nonregulated property gross 20-50 years 7 7 Accumulated depreciation and amortization (1) (1) Nonregulated property, net 6 6 18,773 17,593 Construction work-in-progress 506 782 Property, plant and equipment, net $ 19,279 $ 18,375
Depreciation and Amortization Rates [Table Text Block]	The average depreciation and amortization rates applied to depreciable utility plant for the years ended December 31 were as follows: 2020 2019 2018 Electric 3.2 % 3.1 % 2.9 % Natural gas 2.8 % 2.8 % 2.8 %
PacifiCorp [Member]
Property, Plant and Equipment [Line Items]
Public Utility Property, Plant, and Equipment (NPC, SPPC, PacifiCorp) [Table Text Block]	Property, plant and equipment, net consists of the following as of December 31 (in millions): Depreciable Life 2020 2019 Utility Plant: Generation 14 - 67 years $ 12,861 $ 12,509 Transmission 58 - 75 years 7,632 6,482 Distribution 20 - 70 years 7,660 7,307 Intangible plant (1) 5 - 75 years 1,054 1,016 Other 5 - 60 years 1,510 1,449 Utility plant in service 30,717 28,763 Accumulated depreciation and amortization (9,838) (9,803) Utility plant in service, net 20,879 18,960 Other non-regulated, net of accumulated depreciation and amortization 14 - 95 years 9 10 Plant, net 20,888 18,970 Construction work-in-progress 1,542 2,003 Property, plant and equipment, net $ 22,430 $ 20,973 (1) Computer software costs included in intangible plant are initially assigned a depreciable life of 5 to 10 years.
Nevada Power Company [Member]
Property, Plant and Equipment [Line Items]
Public Utility Property, Plant, and Equipment (NPC, SPPC, PacifiCorp) [Table Text Block]	Property, plant and equipment, net consists of the following as of December 31 (in millions): Depreciable Life 2020 2019 Utility plant: Generation 30 - 55 years $ 3,690 $ 3,541 Transmission 45 - 70 years 1,468 1,444 Distribution 20 - 65 years 3,771 3,567 General and intangible plant 5 - 65 years 791 741 Utility plant 9,720 9,293 Accumulated depreciation and amortization (3,162) (2,951) Utility plant, net 6,558 6,342 Other non-regulated, net of accumulated depreciation and amortization 45 years 1 1 Plant, net 6,559 6,343 Construction work-in-progress 142 195 Property, plant and equipment, net $ 6,701 $ 6,538
Sierra Pacific Power Company [Member]
Property, Plant and Equipment [Line Items]
Public Utility Property, Plant, and Equipment (NPC, SPPC, PacifiCorp) [Table Text Block]	Property, plant and equipment, net consists of the following as of December 31 (in millions): Depreciable Life 2020 2019 Utility plant: Electric generation 25 - 60 years $ 1,130 $ 1,133 Electric transmission 50 - 100 years 908 840 Electric distribution 20 - 100 years 1,754 1,669 Electric general and intangible plant 5 - 70 years 189 178 Natural gas distribution 35 - 70 years 429 417 Natural gas general and intangible plant 5 - 70 years 15 14 Common general 5 - 70 years 355 338 Utility plant 4,780 4,589 Accumulated depreciation and amortization (1,755) (1,629) Utility plant, net 3,025 2,960 Other non-regulated, net of accumulated depreciation and amortization 70 years 2 2 Plant, net 3,027 2,962 Construction work-in-progress 137 113 Property, plant and equipment, net $ 3,164 $ 3,075
Eastern Energy Gas Holdings, LLC [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment [Table Text Block]	Property, plant and equipment, net consists of the following as of December 31 (in millions): Depreciable Life 2020 2019 Utility Plant: Interstate natural gas pipeline assets 24 - 43 years $ 8,382 $ 10,025 Intangible plant 5 - 10 years 115 143 Utility plant in service 8,497 10,168 Accumulated depreciation and amortization (2,759) (3,414) Utility plant in service, net 5,738 6,754 Nonutility Plant: LNG facility 40 years 4,454 4,425 Intangible plant 14 years 25 25 Nonutility plant in service 4,479 4,450 Accumulated depreciation and amortization (283) (196) Nonutility plant in service, net 4,196 4,254 Plant, net 9,934 11,008 Construction work- in-progress 210 719 Property, plant and equipment, net $ 10,144 $ 11,727

Jointly Owned Utility Facilit_2

Jointly Owned Utility Facilities (Tables)	12 Months Ended
	Dec. 31, 2020
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Facilities [Table Text Block]	The amounts shown in the table below represent the Company's share in each jointly owned facility included in property, plant and equipment, net as of December 31, 2020 (dollars in millions): Accumulated Construction Company Facility In Depreciation and Work-in- Share Service Amortization Progress PacifiCorp: Jim Bridger Nos. 1-4 67 % $ 1,485 $ 714 $ 15 Hunter No. 1 94 486 203 1 Hunter No. 2 60 305 127 — Wyodak 80 476 254 2 Colstrip Nos. 3 and 4 10 255 145 6 Hermiston 50 184 93 2 Craig Nos. 1 and 2 19 368 305 — Hayden No. 1 25 75 42 — Hayden No. 2 13 44 25 — Transmission and distribution facilities Various 857 263 100 Total PacifiCorp 4,535 2,171 126 MidAmerican Energy: Louisa No. 1 88 % 853 483 2 Quad Cities Nos. 1 and 2 (1) 25 731 437 10 Walter Scott, Jr. No. 3 79 939 498 7 Walter Scott, Jr. No. 4 (2) 60 267 130 3 George Neal No. 4 41 318 179 3 Ottumwa No. 1 52 669 247 5 George Neal No. 3 72 524 262 2 Transmission facilities Various 261 101 — Total MidAmerican Energy 4,562 2,337 32 NV Energy: Navajo 11 % 10 4 — Valmy 50 390 291 1 Transmission facilities Various 70 31 1 On Line Transmission Line 25 160 27 1 Total NV Energy 630 353 3 BHE Pipeline Group: Ellisburg Pool 39 % 28 10 2 Ellisburg Station 50 25 7 1 Harrison 50 53 16 3 Leidy 50 133 44 3 Oakford 50 200 64 2 Common Facilities Various 277 165 — Total BHE Pipeline Group 716 306 11 Total $ 10,443 $ 5,167 $ 172 (1) Includes amounts related to nuclear fuel.
PacifiCorp [Member]
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Facilities [Table Text Block]	The amounts shown in the table below represent PacifiCorp's share in each jointly owned facility included in property, plant and equipment, net as of December 31, 2020 (dollars in millions): Facility Accumulated Construction PacifiCorp in Depreciation and Work-in- Share Service Amortization Progress Jim Bridger Nos. 1 - 4 67 % $ 1,485 $ 714 $ 15 Hunter No. 1 94 486 203 1 Hunter No. 2 60 305 127 — Wyodak 80 476 254 2 Colstrip Nos. 3 and 4 10 255 145 6 Hermiston 50 184 93 2 Craig Nos. 1 and 2 19 368 305 — Hayden No. 1 25 75 42 — Hayden No. 2 13 44 25 — Transmission and distribution facilities Various 857 263 100 Total $ 4,535 $ 2,171 $ 126
MidAmerican Energy Company [Member]
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Facilities [Table Text Block]	The amounts shown in the table below represent MidAmerican Energy's share in each jointly owned facility included in property, plant and equipment, net as of December 31, 2020 (dollars in millions): Accumulated Construction Company Plant in Depreciation and Work-in- Share Service Amortization Progress Louisa Unit No. 1 88 % $ 853 $ 483 $ 2 Quad Cities Unit Nos. 1 & 2 (1) 25 731 437 10 Walter Scott, Jr. Unit No. 3 79 939 498 7 Walter Scott, Jr. Unit No. 4 (2) 60 267 130 3 George Neal Unit No. 4 41 318 179 3 Ottumwa Unit No. 1 52 669 247 5 George Neal Unit No. 3 72 524 262 2 Transmission facilities Various 261 101 — Total $ 4,562 $ 2,337 $ 32 (1) Includes amounts related to nuclear fuel. (2) Plant in service and accumulated depreciation and amortization amounts are net of credits applied under Iowa regulatory arrangements totaling $509 million and $112 million, respectively.
Nevada Power Company [Member]
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Facilities [Table Text Block]	The amounts shown in the table below represent Nevada Power's share in each jointly owned facility included in property, plant and equipment, net as of December 31, 2020 (dollars in millions): Nevada Construction Power's Utility Accumulated Work-in- Share Plant Depreciation Progress Navajo Generating Station (1) 11 % $ 10 $ 4 $ — ON Line Transmission Line 19 125 20 1 Other transmission facilities Various 66 29 — Total $ 201 $ 53 $ 1 (1) Represents Nevada Power's proportionate share of capitalized asset retirement costs to retire the Navajo Generating Station, which was shut down in November 2019.
Sierra Pacific Power Company [Member]
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Facilities [Table Text Block]	The amounts shown in the table below represent Sierra Pacific's share in each jointly owned facility included in property, plant and equipment, net as of December 31, 2020 (dollars in millions): Sierra Construction Pacific's Utility Accumulated Work-in- Share Plant Depreciation Progress Valmy Generating Station 50 % $ 390 $ 291 $ 1 ON Line Transmission Line 6 35 7 — Valmy Transmission 50 4 2 — Total $ 429 $ 300 $ 1
Eastern Energy Gas Holdings, LLC [Member]
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Facilities [Table Text Block]	The amounts shown in the table below represent Eastern Energy Gas' share in each jointly owned facility included in property, plant and equipment, net as of December 31, 2020 (dollars in millions): Facility Accumulated Construction Eastern Energy Gas' in Depreciation and Work-in- Share Service Amortization Progress Ellisburg Pool 39 % $ 28 $ 10 $ 2 Ellisburg Station 50 25 7 1 Harrison 50 53 16 3 Leidy 50 133 44 3 Oakford 50 200 64 2 Total $ 439 $ 141 $ 11

Leases (Tables)

Leases (Tables)	12 Months Ended
	Dec. 31, 2020
Lessee, Lease, Description [Line Items]
Operating and Finance Lease, Balance Sheet Summary [Table Text Block]	The following table summarizes the Company's leases recorded on the Consolidated Balance Sheet (in millions): As of December 31, 2020 December 31, 2019 Right-of-use assets: Operating leases $ 517 $ 525 Finance leases 501 504 Total right-of-use assets $ 1,018 $ 1,029 Lease liabilities: Operating leases $ 569 $ 577 Finance leases 514 519 Total lease liabilities $ 1,083 $ 1,096
Lease, Cost [Table Text Block]	The following table summarizes the Company's lease costs (in millions): Years Ended December 31, 2020 December 31, 2019 Variable $ 592 $ 623 Operating 151 170 Finance: Amortization 18 16 Interest 40 41 Short-term 20 7 Total lease costs $ 821 $ 857 Weighted-average remaining lease term (years): Operating leases 7.4 7.6 Finance leases 27.5 28.8 Weighted-average discount rate: Operating leases 4.5 % 5.2 % Finance leases 8.5 % 8.6 %
Operating and Finance Lease, Supplemental Cash Flow [Table Text Block]	The following table summarizes the Company's supplemental cash flow information relating to leases (in millions): Years Ended December 31, 2020 December 31, 2019 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ (152) $ (153) Operating cash flows from finance leases (40) (42) Financing cash flows from finance leases (24) (19) Right-of-use assets obtained in exchange for lease liabilities: Operating leases $ 83 $ 82 Finance leases 19 14
Operating and Finance Lease, Liability, Maturity [Table Text Block]	The Company has the following remaining lease commitments as of (in millions): December 31, 2020 Operating Finance Total 2021 $ 152 $ 81 $ 233 2022 125 74 199 2023 93 63 156 2024 66 63 129 2025 50 62 112 Thereafter 199 673 872 Total undiscounted lease payments 685 1,016 1,701 Less - amounts representing interest (116) (502) (618) Lease liabilities $ 569 $ 514 $ 1,083 Sierra Pacific has the following remaining lease commitments as of (in millions): December 31, 2020 Operating Finance Total 2021 $ 2 $ 17 $ 19 2022 1 17 18 2023 1 17 18 2024 1 16 17 2025 1 16 17 Thereafter 25 170 195 Total undiscounted lease payments 31 253 284 Less - amounts representing interest (15) (123) (138) Lease liabilities $ 16 $ 130 $ 146
PacifiCorp [Member]
Lessee, Lease, Description [Line Items]
Operating and Finance Lease, Balance Sheet Summary [Table Text Block]	The following table summarizes PacifiCorp's leases recorded on the Consolidated Balance Sheets as of December 31 (in millions): 2020 2019 Right-of-use assets: Operating leases $ 11 $ 12 Finance leases 17 19 Total right-of-use assets $ 28 $ 31 Lease liabilities: Operating leases $ 11 $ 12 Finance leases 17 19 Total lease liabilities $ 28 $ 31
Lease, Cost [Table Text Block]	The following table summarizes PacifiCorp's lease costs for the years ended December 31 (in millions): 2020 2019 Variable $ 60 $ 77 Operating 3 3 Finance: Amortization 2 1 Interest 2 2 Short-term 1 2 Total lease costs $ 68 $ 85 Weighted-average remaining lease term (years): Operating leases 13.9 14.0 Finance leases 8.4 9.1 Weighted-average discount rate: Operating leases 3.8 % 3.7 % Finance leases 10.5 % 10.6 %
Operating and Finance Lease, Liability, Maturity [Table Text Block]	PacifiCorp has the following remaining lease commitments as of (in millions): December 31, 2020 Operating Finance Total 2021 $ 3 $ 7 $ 10 2022 2 3 5 2023 2 2 4 2024 1 2 3 2025 1 2 3 Thereafter 6 12 18 Total undiscounted lease payments 15 28 43 Less - amounts representing interest (4) (11) (15) Lease liabilities $ 11 $ 17 $ 28
Nevada Power Company [Member]
Lessee, Lease, Description [Line Items]
Operating and Finance Lease, Balance Sheet Summary [Table Text Block]	The following table summarizes Nevada Power's leases recorded on the Consolidated Balance Sheet as of December 31 (in millions): 2020 2019 Right-of-use assets: Operating leases $ 12 $ 13 Finance leases 351 441 Total right-of-use assets $ 363 $ 454 Lease liabilities: Operating leases $ 15 $ 17 Finance leases 361 454 Total lease liabilities $ 376 $ 471
Lease, Cost [Table Text Block]	The following table summarizes Nevada Power's lease costs for the years ended December 31 (in millions): 2020 2019 Variable $ 434 $ 434 Operating 3 3 Finance: Amortization 12 13 Interest 29 37 Total lease costs $ 478 $ 487 Weighted-average remaining lease term (years): Operating leases 6.5 7.5 Finance leases 28.7 30.6 Weighted-average discount rate: Operating leases 4.5 % 4.5 % Finance leases 8.6 % 8.7 %
Operating and Finance Lease, Supplemental Cash Flow [Table Text Block]	The following table summarizes Nevada Power's supplemental cash flow information relating to leases as of December 31 (in millions): 2020 2019 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ (3) $ (3) Operating cash flows from finance leases (34) (37) Financing cash flows from finance leases (15) (14) Right-of-use assets obtained in exchange for lease liabilities: Operating leases $ 1 $ — Finance leases 9 9
Operating and Finance Lease, Liability, Maturity [Table Text Block]	Nevada Power has the following remaining lease commitments as of (in millions): December 31, 2020 Operating Finance Total 2021 $ 3 $ 56 $ 59 2022 3 54 57 2023 2 43 45 2024 3 43 46 2025 3 43 46 Thereafter 4 491 495 Total undiscounted lease payments 18 730 748 Less - amounts representing interest (3) (369) (372) Lease liabilities $ 15 $ 361 $ 376
Sierra Pacific Power Company [Member]
Lessee, Lease, Description [Line Items]
Operating and Finance Lease, Balance Sheet Summary [Table Text Block]	The following table summarizes Sierra Pacific's leases recorded on the Balance Sheet as of December 31 (in millions): 2020 2019 Right-of-use assets: Operating leases $ 16 $ 17 Finance leases 126 43 Total right-of-use assets $ 142 $ 60 Lease liabilities: Operating leases $ 16 $ 17 Finance leases 130 45 Total lease liabilities $ 146 $ 62
Lease, Cost [Table Text Block]	The following table summarizes Sierra Pacific's lease costs for the years ended December 31 (in millions): 2020 2019 Variable $ 78 $ 69 Operating 2 1 Finance: Amortization 4 2 Interest 9 2 Total lease costs $ 93 $ 74 Weighted-average remaining lease term (years): Operating leases 27.2 26.3 Finance leases 27.8 20.9 Weighted-average discount rate: Operating leases 5.0 % 5.0 % Finance leases 8.1 % 7.1 %
Operating and Finance Lease, Supplemental Cash Flow [Table Text Block]	The following table summarizes Sierra Pacific's supplemental cash flow information relating to leases as of December 31 (in millions): 2020 2019 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ (2) $ (3) Operating cash flows from finance leases (6) (3) Financing cash flows from finance leases (5) (3) Right-of-use assets obtained in exchange for lease liabilities: Finance leases $ 89 $ 5
Eastern Energy Gas Holdings, LLC [Member]
Lessee, Lease, Description [Line Items]
Operating and Finance Lease, Balance Sheet Summary [Table Text Block]	The following table summarizes Eastern Energy Gas' leases recorded on the Consolidated Balance Sheet (in millions): As of December 31, 2020 December 31, 2019 Right-of-use assets: Operating leases $ 31 $ 37 Finance leases 8 6 Total right-of-use assets $ 39 $ 43 Lease liabilities: Operating leases $ 29 $ 35 Finance leases 6 6 Total lease liabilities $ 35 $ 41
Lease, Cost [Table Text Block]	The following table summarizes Eastern Energy Gas' lease costs (in millions): Years Ended December 31, 2020 December 31, 2019 Operating $ 7 $ 7 Short-term 5 7 Total lease costs $ 12 $ 14 Weighted-average remaining lease term (years): Operating leases 11.5 11.2 Finance leases 4.7 5.6 Weighted-average discount rate: Operating leases 4.4 % 4.4 % Finance leases 2.6 % 4.1 %
Operating and Finance Lease, Supplemental Cash Flow [Table Text Block]	The following table summarizes Eastern Energy Gas' supplemental cash flow information relating to leases (in millions): Years Ended December 31, 2020 December 31, 2019 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 12 $ 14
Operating and Finance Lease, Liability, Maturity [Table Text Block]	Eastern Energy Gas has the following remaining lease commitments as of (in millions): December 31, 2020 Operating Finance Total 2021 $ 6 $ 2 $ 8 2022 5 2 7 2023 4 1 5 2024 2 1 3 2025 2 1 3 Thereafter 19 — 19 Total undiscounted lease payments $ 38 $ 7 $ 45 Less - amounts representing interest (9) (1) (10) Lease liabilities $ 29 $ 6 $ 35

Regulatory Matters (Tables)

Regulatory Matters (Tables)	12 Months Ended
	Dec. 31, 2020
Schedule Of Regulatory Assets and Liabilities [Line Items]
Regulatory Assets [Table Text Block]	Regulatory assets represent costs that are expected to be recovered in future regulated rates. The Company's regulatory assets reflected on the Consolidated Balance Sheets consist of the following as of December 31 (in millions): Weighted Average Remaining Life 2020 2019 Employee benefit plans (1) 15 years $ 722 $ 667 Asset retirement obligations 13 years 640 445 Asset disposition costs Various 347 391 Deferred income taxes (2) Various 283 223 Demand side management 10 years 197 9 Deferred net power costs 1 year 139 110 Deferred operating costs 11 years 124 134 Other Various 988 902 Total regulatory assets $ 3,440 $ 2,881 Reflected as: Current assets $ 283 $ 115 Noncurrent assets 3,157 2,766 Total regulatory assets $ 3,440 $ 2,881 (1) Represents amounts not yet recognized as a component of net periodic benefit cost that are expected to be included in regulated rates when recognized. (2) Amounts primarily represent income tax benefits related to certain property-related basis differences and other various differences that were previously passed on to customers and will be included in regulated rates when the temporary differences reverse.
Regulatory Liabilities [Table Text Block]	Regulatory liabilities represent income to be recognized or amounts to be returned to customers in future periods. The Company's regulatory liabilities reflected on the Consolidated Balance Sheets consist of the following as of December 31 (in millions): Weighted Average Remaining Life 2020 2019 Deferred income taxes (1) Various $ 3,600 $ 3,611 Cost of removal (2) 26 years 2,435 2,370 Asset retirement obligations 31 years 305 241 Levelized depreciation 29 years 281 304 Other Various 854 785 Total regulatory liabilities $ 7,475 $ 7,311 Reflected as: Current liabilities $ 254 $ 211 Noncurrent liabilities 7,221 7,100 Total regulatory liabilities $ 7,475 $ 7,311 (1) Amounts primarily represent income tax liabilities related to the federal tax rate change from 35% to 21% that are probable to be passed on to customers, offset by income tax benefits related to certain property-related basis differences and other various differences that were previously passed on to customers and will be included in regulated rates when the temporary differences reverse. (2) Amounts represent estimated costs, as accrued through depreciation rates and exclusive of ARO liabilities, of removing regulated property, plant and equipment in accordance with accepted regulatory practices. Amounts are deducted from rate base or otherwise accrue a carrying cost.
PacifiCorp [Member]
Schedule Of Regulatory Assets and Liabilities [Line Items]
Regulatory Assets [Table Text Block]	Regulatory assets represent costs that are expected to be recovered in future rates. PacifiCorp's regulatory assets reflected on the Consolidated Balance Sheets consist of the following as of December 31 (in millions): Weighted Average Remaining Life 2020 2019 Employee benefit plans (1) 20 years $ 432 $ 422 Utah mine disposition (2) Various 117 125 Unamortized contract values 3 years 42 60 Deferred net power costs 1 year 78 106 Unrealized loss on derivative contracts 2 years 17 62 Asset retirement obligation 24 years 252 140 Demand side management (DSM) (3) 10 years 196 8 Other Various 261 200 Total regulatory assets $ 1,395 $ 1,123 Reflected as: Current assets $ 116 $ 63 Noncurrent assets 1,279 1,060 Total regulatory assets $ 1,395 $ 1,123 (1) Represents amounts not yet recognized as a component of net periodic benefit cost that are expected to be included in rates when recognized. (2) Amounts represent regulatory assets established as a result of the Utah mine disposition in 2015 for the United Mine Workers of America ("UMWA") 1974 Pension Plan withdrawal and closure costs incurred to date considered probable of recovery. (3) At December 31, 2019, DSM regulatory assets were substantially offset by amounts billed to Utah retail customers under the related Utah STEP program. In accordance with the Utah general rate case order issued in December 2020, $185 million of amounts billed to Utah customers under the Utah STEP program were used to accelerate depreciation of certain coal-fueled generation units as discussed in Note 3. PacifiCorp had regulatory assets not earning a return on investment of $707 million and $609 million as of December 31, 2020 and 2019, respectively.
Regulatory Liabilities [Table Text Block]	Regulatory Liabilities Regulatory liabilities represent income to be recognized or amounts to be returned to customers in future periods. PacifiCorp's regulatory liabilities reflected on the Consolidated Balance Sheets consist of the following as of December 31 (in millions): Weighted Average Remaining Life 2020 2019 Cost of removal (1) 26 years $ 1,125 $ 1,019 Deferred income taxes (2) Various 1,463 1,653 Other Various 254 297 Total regulatory liabilities $ 2,842 $ 2,969 Reflected as: Current liabilities $ 115 $ 56 Noncurrent liabilities 2,727 2,913 Total regulatory liabilities $ 2,842 $ 2,969 (1) Amounts represent estimated costs, as accrued through depreciation rates, of removing property, plant and equipment in accordance with accepted regulatory practices. Amounts are deducted from rate base or otherwise accrue a carrying cost. (2) Amounts primarily represent income tax liabilities related to the federal tax rate change from 35% to 21% that are probable of being passed on to customers, offset by income tax benefits related to certain property-related basis differences and other various differences that were previously passed on to customers and will be included in regulated rates when the temporary differences reverse.
MidAmerican Energy Company [Member]
Schedule Of Regulatory Assets and Liabilities [Line Items]
Regulatory Assets [Table Text Block]	Regulatory assets represent costs that are expected to be recovered in future regulated rates. MidAmerican Energy's regulatory assets reflected on the Balance Sheets consist of the following as of December 31 (in millions): Weighted Average Remaining Life 2020 2019 Asset retirement obligations (1) 6 years $ 298 $ 223 Employee benefit plans (2) 15 years 66 26 Unrealized loss on regulated derivative contracts 1 year — 7 Other Various 28 33 Total $ 392 $ 289 (1) Amount predominantly relates to AROs for fossil-fueled and wind-powered generating facilities. Refer to Note 11 for a discussion of AROs. (2) Represents amounts not yet recognized as a component of net periodic benefit cost that are expected to be included in regulated rates when recognized.
Regulatory Liabilities [Table Text Block]	Regulatory liabilities represent amounts expected to be returned to customers in future periods. MidAmerican Energy's regulatory liabilities reflected on the Balance Sheets consist of the following as of December 31 (in millions): Weighted Average Remaining Life 2020 2019 Cost of removal accrual (1) 29 years $ 466 $ 572 Asset retirement obligations (2) 32 years 300 241 Deferred income taxes (3) Various 263 478 Pre-funded AFUDC on transmission MVPs (4) 52 years 35 35 Employee benefit plans (5) 9 years 20 32 Iowa electric revenue sharing accrual (6) 1 year — 22 Other Various 27 26 Total $ 1,111 $ 1,406 (1) Amounts represent estimated costs, as accrued through depreciation rates and exclusive of ARO liabilities, of removing utility plant in accordance with accepted regulatory practices. Amounts are deducted from rate base or otherwise accrue a carrying cost. (2) Amount represents the excess of nuclear decommission trust assets over the related ARO. Refer to Note 11 for a discussion of AROs. (3) Amounts primarily represent income tax liabilities primarily related to the federal tax rate change from 35% to 21% that are probable to be passed on to customers, offset by income tax benefits related to state accelerated tax depreciation and certain property-related basis differences that were previously passed on to customers and will be included in regulated rates when the temporary differences reverse. (4) Represents AFUDC accrued on transmission MVPs that is deducted from rate base as a result of the inclusion of related construction work-in-progress in rate base. (5) Represents amounts not yet recognized as a component of net periodic benefit cost that are to be returned to customers in future periods when recognized. (6) Represents current-year accruals under a regulatory arrangement in Iowa in which equity returns exceeding specified thresholds reduce utility plant upon final determination.
Nevada Power Company [Member]
Schedule Of Regulatory Assets and Liabilities [Line Items]
Regulatory Assets [Table Text Block]	Regulatory assets represent costs that are expected to be recovered in future rates. Nevada Power's regulatory assets reflected on the Consolidated Balance Sheets consist of the following as of December 31 (in millions): Weighted Average Remaining Life 2020 2019 Decommissioning costs (2) 3 years $ 230 $ 241 Deferred operating costs 9 years 119 136 Merger costs from 1999 merger 24 years 115 120 Asset retirement obligations 6 years 70 67 Employee benefit plans (1) 8 years 50 87 Legacy meters 12 years 45 49 ON Line deferrals 33 years 43 45 Deferred energy costs 1 year 39 — Abandoned projects None — 12 Other Various 83 44 Total regulatory assets $ 794 $ 801 Reflected as: Current assets $ 48 $ 1 Noncurrent assets 746 800 Total regulatory assets $ 794 $ 801 (1) Represents amounts not yet recognized as a component of net periodic benefit cost that are expected to be included in regulated rates when recognized. (2) Amount includes regulatory assets with an indeterminate life of $11 million and $104 million as of December 31, 2020 and 2019, respectively.
Regulatory Liabilities [Table Text Block]	Regulatory liabilities represent amounts that are expected to be returned to customers in future periods. Nevada Power's regulatory liabilities reflected on the Consolidated Balance Sheets consist of the following as of December 31 (in millions): Weighted Average Remaining Life 2020 2019 Deferred income taxes (1) Various $ 647 $ 681 Cost of removal (2) 32 years 340 332 Impact fees (3) 2 years 54 72 Other Various 172 171 Total regulatory liabilities $ 1,213 $ 1,256 Reflected as: Current liabilities $ 50 $ 93 Noncurrent liabilities 1,163 1,163 Total regulatory liabilities $ 1,213 $ 1,256 (1) Amounts primarily represent income tax liabilities related to the federal tax rate change from 35% to 21% that are probable to be passed on to customers, offset by income tax benefits related to accelerated tax depreciation and certain property-related basis differences that were previously passed on to customers and will be included in regulated rates when the temporary differences reverse. (2) Amounts represent estimated costs, as accrued through depreciation rates and exclusive of ARO liabilities, of removing regulated property, plant and equipment in accordance with accepted regulatory practices. (3) Amounts reduce rate base or otherwise accrue a carrying cost.
Sierra Pacific Power Company [Member]
Schedule Of Regulatory Assets and Liabilities [Line Items]
Regulatory Assets [Table Text Block]	Regulatory assets represent costs that are expected to be recovered in future rates. Sierra Pacific's regulatory assets reflected on the Balance Sheets consist of the following as of December 31 (in millions): Weighted Average Remaining Life 2020 2019 Employee benefit plans (1) 8 years $ 81 $ 107 Merger costs from 1999 merger 26 years 68 71 Natural disaster protection plan 1 year 45 8 Deferred operating costs 11 years 27 23 Abandoned projects 6 years 22 24 Deferred energy costs 1 year 22 4 Losses on reacquired debt 15 years 15 17 Other Various 54 41 Total regulatory assets $ 334 $ 295 Reflected as: Current assets $ 67 $ 12 Noncurrent assets 267 283 Total regulatory assets $ 334 $ 295 (1) Represents amounts not yet recognized as a component of net periodic benefit cost that are expected to be included in regulated rates when recognized.
Regulatory Liabilities [Table Text Block]	Regulatory liabilities represent amounts that are expected to be returned to customers in future periods. Sierra Pacific's regulatory liabilities reflected on the Balance Sheets consist of the following as of December 31 (in millions): Weighted Average Remaining Life 2020 2019 Deferred income taxes (1) Various $ 249 $ 263 Cost of removal (2) 37 years 197 217 Other Various 51 58 Total regulatory liabilities $ 497 $ 538 Reflected as: Current liabilities $ 34 $ 49 Noncurrent liabilities 463 489 Total regulatory liabilities $ 497 $ 538 (1) Amounts primarily represent income tax liabilities related to the federal tax rate change from 35% to 21% that are probable to be passed on to customers, offset by income tax benefits related to accelerated tax depreciation and certain property-related basis differences and other various differences that were previously passed on to customers and will be included in regulated rates when the temporary differences reverse. (2) Amounts represent estimated costs, as accrued through depreciation rates and exclusive of ARO liabilities, of removing regulated property, plant and equipment in accordance with accepted regulatory practices.
Eastern Energy Gas Holdings, LLC [Member]
Schedule Of Regulatory Assets and Liabilities [Line Items]
Regulatory Assets [Table Text Block]	Eastern Energy Gas' regulatory assets reflected on the Consolidated Balance Sheets consist of the following as of December 31 (in millions): Weighted Average Remaining Life 2020 2019 Employee benefit plans (1) Various $ 70 $ — Interest rate hedges (2) Various — 32 Other Various 12 16 Total regulatory assets $ 82 $ 48 Reflected as: Current assets $ 8 $ 8 Noncurrent assets 74 40 Total regulatory assets $ 82 $ 48 (1) Represents costs expected to be recovered through future rates generally over the expected remaining service period of plan participants by certain rate-regulated subsidiaries. (2) Reflects interest rate hedges recoverable from or refundable to customers. Certain of these instruments are settled and any related payments are being amortized into interest expense over the life of the related debt.
Regulatory Liabilities [Table Text Block]	Eastern Energy Gas' regulatory liabilities reflected on the Consolidated Balance Sheets consist of the following as of December 31 (in millions): Weighted Average Remaining Life 2020 2019 Income taxes refundable through future rates (1) Various $ 473 $ 560 Other postretirement benefit costs (2) Various 115 133 Provision for future cost of removal and AROs (3) Various 89 113 Other Various 32 35 Total regulatory liabilities $ 709 $ 841 Reflected as: Current liabilities $ 40 $ 41 Noncurrent liabilities 669 800 Total regulatory liabilities $ 709 $ 841 (1) Amounts primarily represent income tax liabilities related to the federal tax rate change from 35% to 21% that are probable to be passed on to customers, offset by income tax benefits related to certain property-related basis differences and other various differences that were previously passed on to customers and will be included in regulated rates when the temporary differences reverse. (2) Reflects a regulatory liability for the collection of postretirement benefit costs allowed in rates in excess of expense incurred. (3) Rates charged to customers by Eastern Energy Gas' regulated businesses include a provision for the cost of future activities to remove assets that are expected to be incurred at the time of retirement.

Investments and Restricted Ca_2

Investments and Restricted Cash and Investments (Tables)	12 Months Ended
	Dec. 31, 2020
Investments, Including Equity Method And Restricted Cash And Investments [Line Items]
Investments and Restricted Cash and Investments [Table Text Block]	Investments and restricted cash and cash equivalents and investments consists of the following as of December 31 (in millions): 2020 2019 Investments: BYD Company Limited common stock $ 5,897 $ 1,122 Rabbi trusts 440 410 Other 263 187 Total investments 6,600 1,719 Equity method investments: BHE Renewables tax equity investments 5,626 3,130 Electric Transmission Texas, LLC 594 555 Iroquois Gas Transmission System, L.P. 580 — JAX LNG, LLC 75 — Bridger Coal Company 74 81 Other 118 181 Total equity method investments 7,067 3,947 Restricted cash and cash equivalents and investments: Quad Cities Station nuclear decommissioning trust funds 676 599 Other restricted cash and cash equivalents 155 230 Total restricted cash and cash equivalents and investments 831 829 Total investments and restricted cash and cash equivalents and investments $ 14,498 $ 6,495 Reflected as: Other current assets $ 178 $ 240 Noncurrent assets 14,320 6,255 Total investments and restricted cash and cash equivalents and investments $ 14,498 $ 6,495
Unrealized Gain (Loss) on Investments	Gains (losses) on marketable securities, net recognized during the period consists of the following (in millions): Years Ended December 31, 2020 2019 Unrealized gains (losses) recognized on marketable securities still held at the reporting date $ 4,791 $ (290) Net gains recognized on marketable securities sold during the period 6 2 Gains (losses) on marketable securities, net $ 4,797 $ (288)
MidAmerican Energy Company [Member]
Investments, Including Equity Method And Restricted Cash And Investments [Line Items]
Investments and Restricted Cash and Investments [Table Text Block]	Investments and restricted investments consists of the following amounts as of December 31 (in millions): 2020 2019 Nuclear decommissioning trust $ 676 $ 599 Rabbi trusts 211 203 Other 24 16 Total $ 911 $ 818
Eastern Energy Gas Holdings, LLC [Member]
Investments, Including Equity Method And Restricted Cash And Investments [Line Items]
Investments and Restricted Cash and Investments [Table Text Block]	Investments and restricted cash and cash equivalents consists of the following as of December 31 (in millions): December 31, 2020 December 31, 2019 Equity method investments: Iroquois $ 244 $ 276 White River Hub — 36 Total investments 244 312 Restricted cash and cash equivalents: Customer deposits 13 12 Total restricted cash and cash equivalents 13 12 Total investments and restricted cash and cash equivalents $ 257 $ 324 Reflected as: Current assets $ 13 $ 12 Noncurrent assets 244 312 Total investments and restricted cash and cash equivalents $ 257 $ 324

BHE Debt (Tables)

BHE Debt (Tables)	12 Months Ended
	Dec. 31, 2020
BHE Debt [Abstract]
BHE Debt [Table Text Block]	Senior Debt BHE senior debt represents unsecured senior obligations of BHE that are redeemable in whole or in part at any time generally with make-whole premiums. BHE senior debt consists of the following, including fair value adjustments and unamortized premiums, discounts and debt issuance costs, as of December 31 (in millions): Par Value 2020 2019 2.40% Senior Notes, due 2020 — — 349 2.375% Senior Notes, due 2021 450 448 448 2.80% Senior Notes, due 2023 400 398 398 3.75% Senior Notes, due 2023 500 498 498 3.50% Senior Notes, due 2025 400 398 398 4.05% Senior Notes, due 2025 1,250 1,246 — 3.25% Senior Notes, due 2028 600 594 594 8.48% Senior Notes, due 2028 256 257 259 3.70% Senior Notes, due 2030 1,100 1,096 — 1.65% Senior Notes, due 2031 500 497 — 6.125% Senior Bonds, due 2036 1,670 1,661 1,661 5.95% Senior Bonds, due 2037 550 548 548 6.50% Senior Bonds, due 2037 225 223 223 5.15% Senior Notes, due 2043 750 740 740 4.50% Senior Notes, due 2045 750 738 738 3.80% Senior Notes, due 2048 750 738 737 4.45% Senior Notes, due 2049 1,000 990 990 4.25% Senior Notes, due 2050 900 889 — 2.85% Senior Notes, due 2051 1,500 1,488 — Total BHE Senior Debt $ 13,551 $ 13,447 $ 8,581 Reflected as: Current liabilities $ 450 $ 350 Noncurrent liabilities 12,997 8,231 Total BHE Senior Debt $ 13,447 $ 8,581 Junior Subordinated Debentures BHE junior subordinated debentures consists of the following as of December 31 (in millions): Par Value 2020 2019 Junior subordinated debentures, due 2057 100 100 100 Total BHE junior subordinated debentures - noncurrent $ 100 $ 100 $ 100 Long-term debt of subsidiaries consists of the following, including fair value adjustments and unamortized premiums, discounts and debt issuance costs, as of December 31 (in millions): Par Value 2020 2019 PacifiCorp $ 8,667 $ 8,612 $ 7,658 MidAmerican Funding 7,515 7,431 7,427 NV Energy 3,701 3,673 3,821 Northern Powergrid 3,285 3,259 3,221 BHE Pipeline Group 5,705 6,165 1,247 BHE Transmission 3,897 3,877 3,879 BHE Renewables 3,152 3,116 3,206 HomeServices 186 186 213 Total subsidiary debt $ 36,108 $ 36,319 $ 30,672 Reflected as: Current liabilities $ 1,389 $ 2,189 Noncurrent liabilities 34,930 28,483 Total subsidiary debt $ 36,319 $ 30,672 MidAmerican Energy's long-term debt consists of the following, including amounts maturing within one year and unamortized premiums, discounts and debt issuance costs, as of December 31 (dollars in millions): Par Value 2020 2019 First mortgage bonds: 3.70%, due 2023 $ 250 $ 249 $ 249 3.50%, due 2024 500 501 501 3.10%, due 2027 375 373 373 3.65%, due 2029 850 862 864 4.80%, due 2043 350 346 346 4.40%, due 2044 400 395 395 4.25%, due 2046 450 445 445 3.95%, due 2047 475 470 470 3.65%, due 2048 700 689 688 4.25%, due 2049 900 873 872 3.15%, due 2050 600 592 591 Notes: 6.75% Series, due 2031 400 397 396 5.75% Series, due 2035 300 298 298 5.80% Series, due 2036 350 348 348 Transmission upgrade obligation, 4.45% and 3.42% due through 2035 and 2036, respectively 6 4 4 Variable-rate tax-exempt bond obligation series: (weighted average interest rate- 2020-0.14%, 2019-1.66%): Due 2023, issued in 1993 7 7 7 Due 2023, issued in 2008 57 57 57 Due 2024 35 35 35 Due 2025 13 13 13 Due 2036 33 33 33 Due 2038 45 45 45 Due 2046 30 29 29 Due 2047 150 149 149 Total $ 7,276 $ 7,210 $ 7,208

Short-Term Debt and Credit Fa_2

Short-Term Debt and Credit Facilities (Tables)	12 Months Ended
	Dec. 31, 2020
Line of Credit Facility [Line Items]
Short-term Debt [Text Block]	The following table summarizes BHE's and its subsidiaries' availability under their credit facilities as of December 31 (in millions): MidAmerican NV Northern BHE BHE PacifiCorp Funding Energy Powergrid Canada Other Total (1) 2020: Credit facilities (2) $ 3,500 $ 1,200 $ 1,509 $ 650 $ 228 $ 923 $ 3,020 $ 11,030 Less: Short-term debt — (93) — (45) (23) (225) (1,900) (2,286) Tax-exempt bond support and letters of credit — (218) (370) — — (2) — (590) Net credit facilities $ 3,500 $ 889 $ 1,139 $ 605 $ 205 $ 696 $ 1,120 $ 8,154 2019: Credit facilities $ 3,500 $ 1,200 $ 1,309 $ 650 $ 199 $ 674 $ 1,880 $ 9,412 Less: Short-term debt (1,590) (130) — — — (211) (1,283) (3,214) Tax-exempt bond support and letters of credit — (256) (370) — — (3) — (629) Net credit facilities $ 1,910 $ 814 $ 939 $ 650 $ 199 $ 460 $ 597 $ 5,569 (1) The table does not include unused credit facilities and letters of credit for investments that are accounted for under the equity method. (2) Includes the drawn uncommitted credit facilities totaling $23 million at Northern Powergrid. As of December 31, 2020, the Company was in compliance with the covenants of its credit facilities and letter of credit arrangements. BHE BHE has a $3.5 billion unsecured credit facility expiring in June 2022 with one remaining one-year extension option subject to lender consent. This credit facility, which is for general corporate purposes, supports BHE's commercial paper program and provides for the issuance of letters of credit, has a variable interest rate based on the Eurodollar rate or a base rate, at BHE's option, plus a spread that varies based on BHE's credit ratings for its senior unsecured long-term debt securities. As of December 31, 2019, the weighted average interest rate on commercial paper borrowings outstanding was 1.91%. This credit facility requires that BHE's ratio of consolidated debt, including current maturities, to total capitalization not exceed 0.70 to 1.0 as of the last day of each quarter. As of December 31, 2020 and 2019, BHE had $105 million and $107 million, respectively, of letters of credit outstanding. These letters of credit primarily support power purchase agreements and debt service requirements at certain subsidiaries of BHE Renewables, LLC expiring through April 2022 and have provisions that automatically extend the annual expiration dates for an additional year unless the issuing bank elects not to renew a letter of credit prior to the expiration date. PacifiCorp PacifiCorp has a $600 million unsecured credit facility expiring in June 2022 and a $600 million unsecured credit facility expiring in June 2022 with one remaining one-year extension option subject to lender consent. These credit facilities, which support PacifiCorp's commercial paper program, certain series of its tax-exempt bond obligations and provide for the issuance of letters of credit, have variable interest rates based on the Eurodollar rate or a base rate, at PacifiCorp's option, plus a spread that varies based on PacifiCorp's credit ratings for its senior unsecured long-term debt securities. As of December 31, 2020 and 2019, the weighted average interest rate on commercial paper borrowings outstanding was 0.16% and 2.05%, respectively. These credit facilities require that PacifiCorp's ratio of consolidated debt, including current maturities, to total capitalization not exceed 0.65 to 1.0 as of the last day of each quarter. As of December 31, 2020 and 2019, PacifiCorp had $11 million and $13 million, respectively, of fully available letters of credit issued under committed arrangements in support of certain transactions required by third parties and generally have provisions that automatically extend the annual expiration dates for an additional year unless the issuing bank elects not to renew a letter of credit prior to the expiration date. MidAmerican Funding MidAmerican Energy has a $900 million unsecured credit facility expiring in June 2022. The credit facility, which supports MidAmerican Energy's commercial paper program and its variable-rate tax-exempt bond obligations and provides for the issuance of letters of credit, has a variable interest rate based on the Eurodollar rate or a base rate, at MidAmerican Energy's option, plus a spread that varies based on MidAmerican Energy's credit ratings for senior unsecured long-term debt securities. MidAmerican Energy has a $600 million unsecured credit facility, which expires in May 2021, with an option to extend for up to three months, and has a variable interest rate based on the Eurodollar rate or a base rate, at MidAmerican Energy's option, plus a spread. As of December 31, 2019, MidAmerican Energy had a $400 million unsecured credit facility expiring August 2020, which it terminated in May 2020. MidAmerican Energy had no commercial paper borrowings outstanding as of December 31, 2020 and 2019. The credit facility requires that MidAmerican Energy's ratio of consolidated debt, including current maturities, to total capitalization not exceed 0.65 to 1.0 as of the last day of each quarter. NV Energy Nevada Power has a $400 million secured credit facility expiring in June 2022 and Sierra Pacific has a $250 million secured credit facility expiring in June 2022. These credit facilities, which are for general corporate purposes and provide for the issuance of letters of credit, have a variable interest rate based on the Eurodollar rate or a base rate, at each of the Nevada Utilities' option, plus a spread that varies based on each of the Nevada Utilities' credit ratings for its senior secured long‑term debt securities. Amounts due under each credit facility are collateralized by each of the Nevada Utilities' general and refunding mortgage bonds. These credit facilities require that each of the Nevada Utilities' ratio of consolidated debt, including current maturities, to total capitalization not exceed 0.65 to 1.0 as of the last day of each quarter. Northern Powergrid Northern Powergrid has a £150 million unsecured credit facility and in October 2020, it exercised the option to extend the credit facility expiry date by one year to October 2023. The credit facility has a variable interest rate based on sterling London Interbank Offered Rate ("LIBOR") plus a spread that varies based on its credit ratings. The credit facility requires that the ratio of consolidated senior total net debt, including current maturities, to regulated asset value not exceed 0.8 to 1.0 at Northern Powergrid and 0.65 to 1.0 at Northern Powergrid (Northeast) plc and Northern Powergrid (Yorkshire) plc as of June 30 and December 31. Northern Powergrid's interest coverage ratio shall not be less than 2.5 to 1.0. AltaLink AltaLink has a C$500 million secured revolving term credit facility expiring in December 2024 with a recurring one-year extension option subject to lender consent. The credit facility, which provides support for borrowings under the unsecured commercial paper program and may also be used for general corporate purposes, has a variable interest rate based on the Canadian bank prime lending rate or a spread above the Bankers' Acceptance rate, at AltaLink's option, based on AltaLink's credit ratings for its senior secured long-term debt securities. In addition, AltaLink has a C$75 million secured revolving term credit facility expiring in December 2024 with a recurring one-year extension option subject to lender consent. The credit facility, which may be used for general corporate purposes and letters of credit, has a variable interest rate based on the Canadian bank prime lending rate, United States base rate, a spread above the United States LIBOR loan rate or a spread above the Bankers' Acceptance rate, at AltaLink's option, based on AltaLink's credit ratings for its senior secured long-term debt securities. On April 27, 2020, AltaLink added a C$100 million revolving term credit facility to its bank credit facilities with a maturity date of April 27, 2021. The credit facility, which may be used for general corporate purposes, has a variable interest rate based on the Canadian bank prime lending rate or a spread above the Bankers' Acceptance rate, at AltaLink's option, based on AltaLink's credit ratings for its senior secured long-term debt securities. On an annual basis, with the consent of the lenders, the AltaLink can request that the maturity date of the credit facility be extended for a further 365 days. AltaLink entered into this credit facility in order to provide additional liquidity during the COVID-19 pandemic and to provide support for certain regulatory decisions. As of December 31, 2020 and 2019, AltaLink had $113 million and $192 million outstanding under these facilities at a weighted average interest rate of 0.36% and 2.16%, respectively. The credit facilities require the consolidated indebtedness to total capitalization not exceed 0.75 to 1.0 measured as of the last day of each quarter. AltaLink Investments, L.P. has a C$300 million unsecured revolving term credit facility expiring in December 2024 with a recurring one-year extension option subject to lender consent. The credit facility, which may be used for general corporate purposes and letters of credit to a maximum of C$10 million, has a variable interest rate based on the Canadian bank prime lending rate, United States base rate, a spread above the United States LIBOR loan rate or a spread above the Bankers' Acceptance rate, at AltaLink Investments, L.P.'s option, based on AltaLink Investments, L.P.'s credit ratings for its senior unsecured long-term debt securities. On April 27, 2020, AltaLink Investments, L.P. added a C$200 million revolving term credit facility to its bank credit facilities with a maturity date of April 27, 2021. The credit facility, which may be used for general corporate purposes and letters of credit to a maximum of C$10 million, has a variable interest rate based on the Canadian bank prime lending rate, United States base rate, a spread above the United States LIBOR loan rate or a spread above the Bankers' Acceptance rate, at AltaLink Investments, L.P.'s option, based on AltaLink Investments, L.P.'s credit ratings for its senior unsecured long-term debt securities. On an annual basis, with the consent of the lenders, AltaLink Investments, L.P. can request that the maturity date of the credit facility be extended for a further 365 days. As of December 31, 2020 and 2019, AltaLink Investments, L.P. had $112 million and $19 million outstanding under this facility at a weighted average interest rate of 1.47% and 3.08%, respectively. The credit facilities require the consolidated total debt to capitalization to not exceed 0.8 to 1.0 and earnings before interest, taxes, depreciation and amortization to interest expense for the four fiscal quarters ended to not be less than 2.25 to 1.0 measured as of the last day of each quarter. HomeServices HomeServices has a $600 million unsecured credit facility expiring in September 2022. The credit facility, which is for general corporate purposes and provides for the issuance of letters of credit, has a variable interest rate based on the LIBOR or a base rate, at HomeServices' option, plus a spread that varies based on HomeServices' total net leverage ratio as of the last day of each quarter. As of December 31, 2020 and 2019, HomeServices had $100 million and $318 million, respectively, outstanding under its credit facility with a weighted average interest rate of 1.15% and 3.29%, respectively. Through its subsidiaries, HomeServices maintains mortgage lines of credit totaling $2.4 billion and $1.3 billion as of December 31, 2020 and 2019, respectively, used for mortgage banking activities that expire beginning in January 2021 through September 2021. The mortgage lines of credit have variable rates based on LIBOR plus a spread. Collateral for these credit facilities is comprised of residential property being financed and is equal to the loans funded with the facilities. As of December 31, 2020 and 2019, HomeServices had $1.8 billion and $965 million, respectively, outstanding under these mortgage lines of credit at a weighted average interest rate of 2.03% and 3.51%, respectively. BHE Renewables Letters of Credit As of December 31, 2020 and 2019, certain renewable projects collectively have letters of credit outstanding of $305 million and $373 million, respectively, primarily in support of the power purchase agreements and large generator interconnection agreements associated with the projects.
Short-Term Debt and Credit Facilities [Table Text Block]	The following table summarizes BHE's and its subsidiaries' availability under their credit facilities as of December 31 (in millions): MidAmerican NV Northern BHE BHE PacifiCorp Funding Energy Powergrid Canada Other Total (1) 2020: Credit facilities (2) $ 3,500 $ 1,200 $ 1,509 $ 650 $ 228 $ 923 $ 3,020 $ 11,030 Less: Short-term debt — (93) — (45) (23) (225) (1,900) (2,286) Tax-exempt bond support and letters of credit — (218) (370) — — (2) — (590) Net credit facilities $ 3,500 $ 889 $ 1,139 $ 605 $ 205 $ 696 $ 1,120 $ 8,154 2019: Credit facilities $ 3,500 $ 1,200 $ 1,309 $ 650 $ 199 $ 674 $ 1,880 $ 9,412 Less: Short-term debt (1,590) (130) — — — (211) (1,283) (3,214) Tax-exempt bond support and letters of credit — (256) (370) — — (3) — (629) Net credit facilities $ 1,910 $ 814 $ 939 $ 650 $ 199 $ 460 $ 597 $ 5,569 (1) The table does not include unused credit facilities and letters of credit for investments that are accounted for under the equity method. (2) Includes the drawn uncommitted credit facilities totaling $23 million at Northern Powergrid.
Sierra Pacific Power Company [Member]
Line of Credit Facility [Line Items]
Short-term Debt [Text Block]	Short-term Debt and Credit Facilities The following table summarizes Sierra Pacific's availability under its credit facilities as of December 31 (in millions): 2020 2019 Credit facilities $ 250 $ 250 Short-term debt (45) — Net credit facilities $ 205 $ 250 Sierra Pacific has a $250 million secured credit facility expiring in June 2022 The credit facility, which is for general corporate purposes and provides for the issuance of letters of credit, has a variable interest rate based on the Eurodollar rate or a base rate, at Sierra Pacific's option, plus a spread that varies based on Sierra Pacific's credit ratings for its senior secured long‑term debt securities. As of December 31, 2020 and 2019, Sierra Pacific had borrowings of $45 million and $— million, respectively, outstanding under the credit facility. As of December 31, 2020, the weighted average interest rate on borrowings outstanding was 0.90%. Amounts due under Sierra Pacific's credit facility are collateralized by Sierra Pacific's general and refunding mortgage bonds. The credit facility requires Sierra Pacific's ratio of debt, including current maturities, to total capitalization not exceed 0.65 to 1.0 as of the last day of each quarter.
Short-Term Debt and Credit Facilities [Table Text Block]	The following table summarizes Sierra Pacific's availability under its credit facilities as of December 31 (in millions): 2020 2019 Credit facilities $ 250 $ 250 Short-term debt (45) — Net credit facilities $ 205 $ 250
PacifiCorp [Member]
Line of Credit Facility [Line Items]
Short-term Debt [Text Block]	Short-term Debt and Credit Facilities The following table summarizes PacifiCorp's availability under its credit facilities as of December 31 (in millions): 2020: Credit facilities $ 1,200 Less: Short-term debt (93) Tax-exempt bond support (218) Net credit facilities $ 889 2019: Credit facilities $ 1,200 Less: Short-term debt (130) Tax-exempt bond support (256) Net credit facilities $ 814 As of December 31, 2020, PacifiCorp was in compliance with the covenants of its credit facilities and letter of credit arrangements. PacifiCorp has a $600 million unsecured credit facility expiring in June 2022 and a $600 million unsecured credit facility expiring in June 2022 with one remaining one-year extension option subject to lender consent. These credit facilities, which support PacifiCorp's commercial paper program, certain series of its tax-exempt bond obligations and provide for the issuance of letters of credit, have variable interest rates based on the Eurodollar rate or a base rate, at PacifiCorp's option, plus a spread that varies based on PacifiCorp's credit ratings for its senior unsecured long-term debt securities. As of December 31, 2020 and 2019, the weighted average interest rate on commercial paper borrowings outstanding was 0.16% and 2.05%, respectively. These credit facilities require that PacifiCorp's ratio of consolidated debt, including current maturities, to total capitalization not exceed 0.65 to 1.0 as of the last day of each quarter. As of December 31, 2020 and 2019, PacifiCorp had $11 million and $13 million, respectively, of fully available letters of credit issued under committed arrangements. As of December 31, 2020 and 2019, $11 million and $13 million, respectively, support certain transactions required by third parties and generally have provisions that automatically extend the annual expiration dates for an additional year unless the issuing bank elects not to renew a letter of credit prior to the expiration date.
Short-Term Debt and Credit Facilities [Table Text Block]	The following table summarizes PacifiCorp's availability under its credit facilities as of December 31 (in millions): 2020: Credit facilities $ 1,200 Less: Short-term debt (93) Tax-exempt bond support (218) Net credit facilities $ 889 2019: Credit facilities $ 1,200 Less: Short-term debt (130) Tax-exempt bond support (256) Net credit facilities $ 814
MidAmerican Energy Company [Member]
Line of Credit Facility [Line Items]
Short-term Debt [Text Block]	Interim financing of working capital needs and the construction program is obtained from unaffiliated parties through the sale of commercial paper or short-term borrowing from banks. The following table summarizes MidAmerican Energy's availability under its unsecured revolving credit facilities as of December 31 (in millions): 2020 2019 Credit facilities $ 1,505 $ 1,305 Less: Variable-rate tax-exempt bond support (370) (370) Net credit facilities $ 1,135 $ 935 MidAmerican Energy has a $900 million unsecured credit facility expiring June 2022. The credit facility, which supports MidAmerican Energy's commercial paper program and its variable-rate tax-exempt bond obligations and provides for the issuance of letters of credit, has a variable interest rate based on the Eurodollar rate or a base rate, at MidAmerican Energy's option, plus a spread that varies based on MidAmerican Energy's credit ratings for senior unsecured long-term debt securities. MidAmerican Energy has a $600 million unsecured credit facility, which expires May 2021, with an option to extend for up to three months, and has a variable interest rate based on the Eurodollar rate or a base rate, at MidAmerican Energy's option, plus a spread. Additionally, MidAmerican Energy has a $5 million unsecured credit facility, which expires June 2021 and has a variable interest rate based on the Eurodollar rate plus a spread. As of December 31, 2019, MidAmerican Energy had a $400 million unsecured credit facility expiring August 2020, which was terminated in May 2020. MidAmerican Energy had no commercial paper borrowings outstanding of as of December 31, 2020 and 2019. The $900 million and $600 million credit facilities each require that MidAmerican Energy's ratio of consolidated debt, including current maturities, to total capitalization not exceed 0.65 to 1.0 as of the last day of any quarter. As of December 31, 2020, MidAmerican Energy was in compliance with the covenants of its credit facilities. MidAmerican Energy has authority from the FERC to issue commercial paper and bank notes aggregating $1.5 billion through April 2, 2022.
Nevada Power Company [Member]
Line of Credit Facility [Line Items]
Short-term Debt [Text Block]	Short-term Debt and Credit Facilities Nevada Power has a $400 million secured credit facility expiring in June 2022. The credit facility, which is for general corporate purposes and provide for the issuance of letters of credit, has a variable interest rate based on the Eurodollar rate or a base rate, at Nevada Power's option, plus a spread that varies based on Nevada Power's credit ratings for its senior secured long‑term debt securities. As of December 31, 2020 and 2019, Nevada Power had no borrowings outstanding under the credit facility. Amounts due under Nevada Power's credit facility are collateralized by Nevada Power's general and refunding mortgage bonds. The credit facility requires Nevada Power's ratio of consolidated debt, including current maturities, to total capitalization not exceed 0.65 to 1.0 as of the last day of each quarter.

Subsidiary Debt (Tables)

Subsidiary Debt (Tables)	12 Months Ended
	Dec. 31, 2020
Debt Instrument [Line Items]
Subsidiary Debt [Table Text Block]	Senior Debt BHE senior debt represents unsecured senior obligations of BHE that are redeemable in whole or in part at any time generally with make-whole premiums. BHE senior debt consists of the following, including fair value adjustments and unamortized premiums, discounts and debt issuance costs, as of December 31 (in millions): Par Value 2020 2019 2.40% Senior Notes, due 2020 — — 349 2.375% Senior Notes, due 2021 450 448 448 2.80% Senior Notes, due 2023 400 398 398 3.75% Senior Notes, due 2023 500 498 498 3.50% Senior Notes, due 2025 400 398 398 4.05% Senior Notes, due 2025 1,250 1,246 — 3.25% Senior Notes, due 2028 600 594 594 8.48% Senior Notes, due 2028 256 257 259 3.70% Senior Notes, due 2030 1,100 1,096 — 1.65% Senior Notes, due 2031 500 497 — 6.125% Senior Bonds, due 2036 1,670 1,661 1,661 5.95% Senior Bonds, due 2037 550 548 548 6.50% Senior Bonds, due 2037 225 223 223 5.15% Senior Notes, due 2043 750 740 740 4.50% Senior Notes, due 2045 750 738 738 3.80% Senior Notes, due 2048 750 738 737 4.45% Senior Notes, due 2049 1,000 990 990 4.25% Senior Notes, due 2050 900 889 — 2.85% Senior Notes, due 2051 1,500 1,488 — Total BHE Senior Debt $ 13,551 $ 13,447 $ 8,581 Reflected as: Current liabilities $ 450 $ 350 Noncurrent liabilities 12,997 8,231 Total BHE Senior Debt $ 13,447 $ 8,581 Junior Subordinated Debentures BHE junior subordinated debentures consists of the following as of December 31 (in millions): Par Value 2020 2019 Junior subordinated debentures, due 2057 100 100 100 Total BHE junior subordinated debentures - noncurrent $ 100 $ 100 $ 100 Long-term debt of subsidiaries consists of the following, including fair value adjustments and unamortized premiums, discounts and debt issuance costs, as of December 31 (in millions): Par Value 2020 2019 PacifiCorp $ 8,667 $ 8,612 $ 7,658 MidAmerican Funding 7,515 7,431 7,427 NV Energy 3,701 3,673 3,821 Northern Powergrid 3,285 3,259 3,221 BHE Pipeline Group 5,705 6,165 1,247 BHE Transmission 3,897 3,877 3,879 BHE Renewables 3,152 3,116 3,206 HomeServices 186 186 213 Total subsidiary debt $ 36,108 $ 36,319 $ 30,672 Reflected as: Current liabilities $ 1,389 $ 2,189 Noncurrent liabilities 34,930 28,483 Total subsidiary debt $ 36,319 $ 30,672 MidAmerican Energy's long-term debt consists of the following, including amounts maturing within one year and unamortized premiums, discounts and debt issuance costs, as of December 31 (dollars in millions): Par Value 2020 2019 First mortgage bonds: 3.70%, due 2023 $ 250 $ 249 $ 249 3.50%, due 2024 500 501 501 3.10%, due 2027 375 373 373 3.65%, due 2029 850 862 864 4.80%, due 2043 350 346 346 4.40%, due 2044 400 395 395 4.25%, due 2046 450 445 445 3.95%, due 2047 475 470 470 3.65%, due 2048 700 689 688 4.25%, due 2049 900 873 872 3.15%, due 2050 600 592 591 Notes: 6.75% Series, due 2031 400 397 396 5.75% Series, due 2035 300 298 298 5.80% Series, due 2036 350 348 348 Transmission upgrade obligation, 4.45% and 3.42% due through 2035 and 2036, respectively 6 4 4 Variable-rate tax-exempt bond obligation series: (weighted average interest rate- 2020-0.14%, 2019-1.66%): Due 2023, issued in 1993 7 7 7 Due 2023, issued in 2008 57 57 57 Due 2024 35 35 35 Due 2025 13 13 13 Due 2036 33 33 33 Due 2038 45 45 45 Due 2046 30 29 29 Due 2047 150 149 149 Total $ 7,276 $ 7,210 $ 7,208
Maturities of Long-term Debt [Table Text Block]	Annual Repayments of Long-Term Debt The annual repayments of BHE and subsidiary debt for the years beginning January 1, 2021 and thereafter, excluding fair value adjustments and unamortized premiums, discounts and debt issuance costs, are as follows (in millions): 2026 and 2021 2022 2023 2024 2025 Thereafter Total BHE senior notes $ 450 $ — $ 900 $ — $ 1,650 $ 10,551 $ 13,551 BHE junior subordinated debentures — — — — — 100 100 PacifiCorp 420 605 449 591 302 6,300 8,667 MidAmerican Funding — — 315 535 13 6,652 7,515 NV Energy — — 250 — — 3,451 3,701 Northern Powergrid 40 521 42 44 319 2,319 3,285 BHE Pipeline Group 700 — 650 1,050 — 3,305 5,705 BHE Transmission — 374 394 280 — 2,849 3,897 BHE Renewables 196 195 200 210 241 2,110 3,152 HomeServices 33 153 — — — — 186 Totals $ 1,839 $ 1,848 $ 3,200 $ 2,710 $ 2,525 $ 37,637 $ 49,759
MidAmerican Energy Company [Member]
Debt Instrument [Line Items]
Maturities of Long-term Debt [Table Text Block]	The annual repayments of MidAmerican Energy's long-term debt for the years beginning January 1, 2021, and thereafter, excluding unamortized premiums, discounts and debt issuance costs, are as follows (in millions): 2021 $ — 2022 — 2023 315 2024 535 2025 13 2026 and thereafter 6,413
Sierra Pacific Power Company [Member]
Debt Instrument [Line Items]
Subsidiary Debt [Table Text Block]	Sierra Pacific's long-term debt consists of the following, including unamortized premiums, discounts and debt issuance costs, as of December 31 (dollars in millions): Par Value 2020 2019 General and refunding mortgage securities: 3.375% Series T, due 2023 $ 250 $ 249 $ 249 2.600% Series U, due 2026 400 396 396 6.750% Series P, due 2037 252 255 255 Tax-exempt refunding revenue bond obligations: Fixed-rate series: 1.850% Pollution Control Series 2016B, due 2029 (1) 30 29 29 3.000% Gas and Water Series 2016B, due 2036 (2) 60 61 62 0.625% Water Facilities Series 2016C, due 2036 (3) 30 30 — 2.050% Water Facilities Series 2016D, due 2036 (1) (4) 25 25 25 2.050% Water Facilities Series 2016E, due 2036 (1) (4) 25 25 25 2.050% Water Facilities Series 2016F, due 2036 (1) 75 74 74 1.850% Water Facilities Series 2016G, due 2036 (1) 20 20 20 Total long-term debt $ 1,167 $ 1,164 $ 1,135 Reflected as - Long-term debt $ 1,164 $ 1,135 (1) Subject to mandatory purchase by Sierra Pacific in April 2022 at which date the interest rate may be adjusted. (2) Subject to mandatory purchase by Sierra Pacific in June 2022 at which date the interest rate may be adjusted. (3) Bond was purchased by Sierra Pacific during 2019 and re-offered at a fixed rate in September 2020 for a two-year term subject to mandatory purchase by Sierra Pacific in April 2022.
Maturities of Long-term Debt [Table Text Block]	The annual repayments of long-term debt for the years beginning January 1, 2021 and thereafter, are as follows (in millions): 2023 $ 250 2026 and thereafter 917 Total 1,167 Unamortized premium, discount and debt issuance cost (3) Total $ 1,164
Nevada Power Company [Member]
Debt Instrument [Line Items]
Subsidiary Debt [Table Text Block]	Nevada Power's long-term debt consists of the following, including unamortized premiums, discounts and debt issuance costs, as of December 31 (dollars in millions): Par Value 2020 2019 General and refunding mortgage securities: 2.750% Series BB, due 2020 $ — $ — $ 575 3.700% Series CC, due 2029 500 496 496 2.400% Series DD, due 2030 425 422 — 6.650% Series N, due 2036 367 359 358 6.750% Series R, due 2037 349 346 346 5.375% Series X, due 2040 250 248 248 5.450% Series Y, due 2041 250 237 237 3.125% Series EE, due 2050 300 297 — Tax-exempt refunding revenue bond obligations: Fixed-rate series: 1.875% Pollution Control Bonds Series 2017A, due 2032 (1) 40 39 39 1.650% Pollution Control Bonds Series 2017, due 2036 (1) 40 39 39 1.650% Pollution Control Bonds Series 2017B, due 2039 (1) 13 13 13 Total long-term debt $ 2,534 $ 2,496 $ 2,351 Reflected as: Current portion of long-term debt $ — $ 575 Long-term debt 2,496 1,776 Total long-term debt $ 2,496 $ 2,351
Maturities of Long-term Debt [Table Text Block]	The annual repayments of long-term debt for the years beginning January 1, 2021 and thereafter, are as follows (in millions): 2026 and thereafter $ 2,534 Unamortized premium, discount and debt issuance cost (38) Total $ 2,496
PacifiCorp [Member]
Debt Instrument [Line Items]
Maturities of Long-term Debt [Table Text Block]	As of December 31, 2020, the annual principal maturities of long-term debt for 2021 and thereafter are as follows (in millions): Long-term Debt 2021 $ 420 2022 605 2023 449 2024 591 2025 302 Thereafter 6,300 Total 8,667 Unamortized discount and debt issuance costs (55) Total $ 8,612
Eastern Energy Gas Holdings, LLC [Member]
Debt Instrument [Line Items]
Subsidiary Debt [Table Text Block]	Eastern Energy Gas' long-term debt consists of the following, including unamortized premiums, discounts and debt issuance costs, as of December 31 (dollars and euros in millions): Par Value 2020 2019 Variable-rate Senior Notes, due 2021 (1) $ 500 $ 500 $ 499 2.8% Senior Notes, due 2020 — — 699 2.875% Senior Notes, due 2023 250 249 249 3.55% Senior Notes, due 2023 400 399 398 2.5% Senior Notes, due 2024 600 596 596 3.6% Senior Notes, due 2024 450 448 447 3.32% Senior Notes, due 2026 (€250) (2) 305 304 279 3.53% Senior Notes, due 2028 (3) — — 99 3% Senior Notes, due 2029 600 594 594 3.8% Senior Notes, due 2031 150 150 149 3.91% Senior Notes, due 2038 (3) — — 149 4.875% Senior Notes, due 2041 (3) — — 177 4.8% Senior Notes, due 2043 400 395 395 4.6% Senior Notes, due 2044 500 493 493 3.9% Senior Notes, due 2049 300 297 297 Total long-term debt $ 4,455 $ 4,425 $ 5,520 Reflected as: Current portion of long-term debt $ 500 $ 699 Long-term debt 3,925 4,821 Total long-term debt $ 4,425 $ 5,520 (1) The senior notes have variable interest rates based on LIBOR plus an applicable spread. Eastern Energy Gas has entered into an interest rate swap that fixes the interest rate on 100% of the notes. The fixed interest rates as of December 31, 2020 and 2019 were 3.46% (including a 0.60% margin). (2) The senior notes are denominated in Euros with an outstanding principal balance of €250 million and a fixed interest rate of 1.45%. Eastern Energy Gas has entered into cross currency swaps that fix USD payments for 100% of the notes. The fixed USD outstanding principal when combined with the swaps is $280 million, with fixed interest rates at both December 31, 2020 and 2019 that averaged 3.32%. (3) Long-term debt associated with the Questar Pipeline Group.
Maturities of Long-term Debt [Table Text Block]	The annual repayments of long-term debt for the years beginning January 1, 2021 and thereafter, are as follows (in millions): 2021 $ 500 2022 — 2023 650 2024 1,050 2025 — 2026 and thereafter 2,255 Total 4,455 Unamortized premium, discount and debt issuance cost (30) Total $ 4,425
BHE Pipeline Group [Member]
Debt Instrument [Line Items]
Subsidiary Debt [Table Text Block]	BHE Pipeline Group BHE Pipeline Group's long-term debt consists of the following, including unamortized premiums, discounts and debt issuance costs, as of December 31 (dollars in millions): Par Value 2020 2019 Eastern Energy Gas: Variable-rate Senior Notes, due 2021 (1) $ 500 $ 500 $ — 2.875% Senior Notes, due 2023 250 249 — 3.55% Senior Notes, due 2023 400 399 — 2.50% Senior Notes, due 2024 600 596 — 3.60% Senior Notes, due 2024 450 448 — 3.32% Senior Notes, due 2026 (€250) (2) 305 304 — 3.00% Senior Notes, due 2029 600 594 — 3.80% Senior Notes, due 2031 150 150 — 4.80% Senior Notes, due 2043 400 395 — 4.60% Senior Notes, due 2044 500 493 — 3.90% Senior Notes, due 2049 300 297 — Total Eastern Energy Gas 4,455 4,425 — Purchase price adjustment — 493 — Total Eastern Energy Gas, net of purchase accounting adjustment 4,455 4,918 — Northern Natural Gas: 4.25% Senior Notes, due 2021 200 200 200 5.80% Senior Bonds, due 2037 150 149 149 4.10% Senior Bonds, due 2042 250 248 248 4.30% Senior Bonds, due 2049 650 650 650 Total Northern Natural Gas 1,250 1,247 1,247 Total BHE Pipeline Group $ 5,705 $ 6,165 $ 1,247
PacifiCorp [Member]
Debt Instrument [Line Items]
Subsidiary Debt [Table Text Block]	PacifiCorp PacifiCorp's long-term debt consists of the following, including unamortized premiums, discounts and debt issuance costs as of December 31 (dollars in millions): Par Value 2020 2019 First mortgage bonds: 2.95% to 8.53%, due through 2025 $ 2,149 $ 2,145 $ 2,144 2.70% to 6.71%, due 2026 to 2030 900 895 497 5.25% to 7.70%, due 2031 to 2035 800 796 795 5.75% to 6.35%, due 2036 to 2039 2,500 2,485 2,484 4.10%, due 2042 300 297 297 3.30% to 4.15%, due 2049 to 2051 1,800 1,776 1,186 Variable-rate series, tax-exempt bond obligations (2020-0.14% to 0.16%; 2019-1.60% to 1.80%): Due 2020 — — 38 Due 2025 25 25 24 Due 2024 to 2025 (1) 193 193 193 Total PacifiCorp $ 8,667 $ 8,612 $ 7,658 (1) Secured by pledged first mortgage bonds registered to and held by the tax-exempt bond trustee generally with the same interest rates, maturity dates and redemption provisions as the tax-exempt bond obligations.
MidAmerican Funding [Member]
Debt Instrument [Line Items]
Subsidiary Debt [Table Text Block]	MidAmerican Funding MidAmerican Funding's long-term debt consists of the following, including fair value adjustments and unamortized premiums, discounts and debt issuance costs, as of December 31 (dollars in millions): Par Value 2020 2019 MidAmerican Funding: 6.927% Senior Bonds, due 2029 $ 239 $ 221 $ 219 MidAmerican Energy: Tax-exempt bond obligations - Variable-rate tax-exempt bond obligation series: (weighted average interest rate - 2020-0.14%, 2019-1.66%), due 2023-2047 370 368 368 First Mortgage Bonds: 3.70%, due 2023 250 249 249 3.50%, due 2024 500 501 501 3.10%, due 2027 375 373 373 3.65%, due 2029 850 862 864 4.80%, due 2043 350 346 346 4.40%, due 2044 400 395 395 4.25%, due 2046 450 445 445 3.95%, due 2047 475 470 470 3.65%, due 2048 700 689 688 4.25%, due 2049 900 873 872 3.15%, due 2050 600 592 591 Notes: 6.75% Series, due 2031 400 397 396 5.75% Series, due 2035 300 298 298 5.80% Series, due 2036 350 348 348 Transmission upgrade obligation, 4.45% and 3.42% due through 2035 and 2036, respectively 6 4 4 Total MidAmerican Energy 7,276 7,210 7,208 Total MidAmerican Funding $ 7,515 $ 7,431 $ 7,427
NV Energy [Member]
Debt Instrument [Line Items]
Subsidiary Debt [Table Text Block]	NV Energy NV Energy's long-term debt consists of the following, including fair value adjustments and unamortized premiums, discounts and debt issuance costs, as of December 31 (dollars in millions): Par Value 2020 2019 NV Energy: 6.250% Senior Notes, due 2020 $ — $ — $ 321 Nevada Power: General and refunding mortgage securities: 2.750% Series BB, due 2020 — — 575 3.700% Series CC, due 2029 500 496 496 2.400% Series DD, due 2030 425 422 — 6.650% Series N, due 2036 367 361 360 6.750% Series R, due 2037 349 347 348 5.375% Series X, due 2040 250 249 249 5.450% Series Y, due 2041 250 244 245 3.125% Series EE, due 2050 300 297 — Tax-exempt refunding revenue bond obligations: Fixed-rate series: 1.875% Pollution Control Bonds Series 2017A, due 2032 (1) 40 39 39 1.650% Pollution Control Bonds Series 2017, due 2036 (1) 40 39 39 1.650% Pollution Control Bonds Series 2017B, due 2039 (1) 13 13 13 Total Nevada Power 2,534 2,507 2,364 Sierra Pacific: General and refunding mortgage securities: 3.375% Series T, due 2023 250 249 249 2.600% Series U, due 2026 400 397 396 6.750% Series P, due 2037 252 256 256 Tax-exempt refunding revenue bond obligations: Fixed-rate series: 1.850% Pollution Control Series 2016B, due 2029 (2) 30 29 29 3.000% Gas and Water Series 2016B, due 2036 (3) 60 61 62 0.625% Water Facilities Series 2016C, due 2036 (4) 30 30 — 2.050% Water Facilities Series 2016D, due 2036 (2)(5) 25 25 25 2.050% Water Facilities Series 2016E, due 2036 (2)(5) 25 25 25 2.050% Water Facilities Series 2016F, due 2036 (2) 75 74 74 1.850% Water Facilities Series 2016G, due 2036 (2) 20 20 20 Total Sierra Pacific 1,167 1,166 1,136 Total NV Energy $ 3,701 $ 3,673 $ 3,821
BHE Transmission [Member]
Debt Instrument [Line Items]
Subsidiary Debt [Table Text Block]	BHE Transmission BHE Transmission's long-term debt consists of the following, including fair value adjustments and unamortized premiums, discounts and debt issuance costs, as of December 31 (dollars in millions): Par Value (1) 2020 2019 AltaLink Investments, L.P.: Series 13-1 Senior Bonds, 3.265%, due 2020 $ — $ — $ 154 Series 15-1 Senior Bonds, 2.244%, due 2022 157 157 154 Total AltaLink Investments, L.P. 157 157 308 AltaLink, L.P.: Series 2013-2 Notes, 3.621%, due 2020 — — 96 Series 2012-2 Notes, 2.978%, due 2022 216 216 212 Series 2013-4 Notes, 3.668%, due 2023 393 392 384 Series 2014-1 Notes, 3.399%, due 2024 275 275 269 Series 2016-1 Notes, 2.747%, due 2026 275 274 269 Series 2020-1 Notes, 1.509%, due 2030 177 175 — Series 2006-1 Notes, 5.249%, due 2036 118 118 115 Series 2010-1 Notes, 5.381%, due 2040 98 98 96 Series 2010-2 Notes, 4.872%, due 2040 118 117 115 Series 2011-1 Notes, 4.462%, due 2041 216 215 211 Series 2012-1 Notes, 3.990%, due 2042 413 407 398 Series 2013-3 Notes, 4.922%, due 2043 275 274 268 Series 2014-3 Notes, 4.054%, due 2044 232 230 226 Series 2015-1 Notes, 4.090%, due 2045 275 273 268 Series 2016-2 Notes, 3.717%, due 2046 354 351 345 Series 2013-1 Notes, 4.446%, due 2053 196 196 192 Series 2014-2 Notes, 4.274%, due 2064 102 102 100 Total AltaLink, L.P. 3,733 3,713 3,564 Other: Construction Loan, 5.620%, due 2024 7 7 7 Total BHE Transmission $ 3,897 $ 3,877 $ 3,879 (1) The par values for these debt instruments are denominated in Canadian dollars.
Berkshire Hathaway Energy Renewables [Member]
Debt Instrument [Line Items]
Subsidiary Debt [Table Text Block]	BHE Renewables BHE Renewables' long-term debt consists of the following, including unamortized premiums, discounts and debt issuance costs, as of December 31 (dollars in millions): Par Value 2020 2019 Fixed-rate (1) : Bishop Hill Holdings Senior Notes, 5.125%, due 2032 $ 70 $ 69 $ 77 Solar Star Funding Senior Notes, 3.950%, due 2035 271 269 280 Solar Star Funding Senior Notes, 5.375%, due 2035 861 853 886 Grande Prairie Wind Senior Notes, 3.860%, due 2037 330 327 355 Topaz Solar Farms Senior Notes, 5.750%, due 2039 638 631 672 Topaz Solar Farms Senior Notes, 4.875%, due 2039 182 180 193 Alamo 6 Senior Notes, 4.170%, due 2042 208 205 213 Other 9 8 13 Variable-rate (1) : TX Jumbo Road Term Loan, due 2025 (2) 140 138 158 Marshall Wind Term Loan, due 2026 (2) 70 69 75 Pinyon Pines I and II Term Loans, due 2034 (2) 373 367 284 Total BHE Renewables $ 3,152 $ 3,116 $ 3,206 (1) Amortizes quarterly or semiannually. (2) The term loans have variable interest rates based on LIBOR plus a margin that varies during the terms of the agreements. The Company has entered into interest rate swaps that fix the interest rate on 100% of the Pinyon Pines, TX Jumbo Road and Marshall Wind outstanding debt. The fixed interest rates as of December 31, 2020 and 2019 ranged from 3.21% to 5.41%. As of December 31, 2019, Pinyon Pines I and II had entered into interest rate swaps that fixed the interest rate on 75% of the Pinyon Pines outstanding debt through December 31, 2019 and 50% of the Pinyon Pines outstanding debt thereafter. The variable interest rate as of December 31, 2019 was 3.69%.
HomeServices [Member]
Debt Instrument [Line Items]
Subsidiary Debt [Table Text Block]	HomeServices HomeServices' long-term debt consists of the following, including unamortized premiums, discounts and debt issuance costs, as of December 31 (dollars in millions): Par Value 2020 2019 Variable-rate: Variable-rate term loan (2020 - 1.394%, 2019 - 3.299%), due 2022 (1) $ 186 $ 186 $ 213

Risk Management and Hedging A_2

Risk Management and Hedging Activities (Tables)	12 Months Ended
	Dec. 31, 2020
PacifiCorp [Member]
Derivative [Line Items]
Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block]	The following table, which reflects master netting arrangements and excludes contracts that have been designated as normal under the normal purchases or normal sales exception afforded by GAAP, summarizes the fair value of PacifiCorp's derivative contracts, on a gross basis, and reconciles those amounts to the amounts presented on a net basis on the Consolidated Balance Sheets (in millions): Other Other Other Current Other Current Long-term Assets Assets Liabilities Liabilities Total As of December 31, 2020: Not designated as hedging contracts (1) : Commodity assets $ 29 $ 6 $ 1 $ — $ 36 Commodity liabilities (2) — (23) (28) (53) Total 27 6 (22) (28) (17) Total derivatives 27 6 (22) (28) (17) Cash collateral receivable — — 15 9 24 Total derivatives - net basis $ 27 $ 6 $ (7) $ (19) $ 7 As of December 31, 2019: Not designated as hedging contracts (1) : Commodity assets $ 15 $ 2 $ 4 $ — $ 21 Commodity liabilities (3) — (31) (50) (84) Total 12 2 (27) (50) (63) Total derivatives 12 2 (27) (50) (63) Cash collateral receivable — — 20 27 47 Total derivatives - net basis $ 12 $ 2 $ (7) $ (23) $ (16) (1) PacifiCorp's commodity derivatives are generally included in rates and as of December 31, 2020 and 2019, a regulatory asset of $17 million and $62 million, respectively, was recorded related to the net derivative liability of $17 million and $63 million, respectively.
Schedule of Regulatory Assets (Liabilities), Net, Unrealized Loss (Gain), Net, on Derivative Contracts [Table Text Block]	The following table reconciles the beginning and ending balances of PacifiCorp's regulatory assets and summarizes the pre-tax gains and losses on commodity derivative contracts recognized in regulatory assets, as well as amounts reclassified to earnings for the years ended December 31 (in millions): 2020 2019 2018 Beginning balance $ 62 $ 96 $ 101 Changes in fair value recognized in regulatory assets (11) (37) 12 Net gains (losses) reclassified to operating revenue 3 (34) (68) Net (losses) gains reclassified to energy costs (37) 37 51 Ending balance $ 17 $ 62 $ 96
Schedule of Notional Amounts of Outstanding Derivative Positions [Table Text Block]	The following table summarizes the net notional amounts of outstanding commodity derivative contracts with fixed price terms that comprise the mark-to-market values as of December 31 (in millions): Unit of Measure 2020 2019 Electricity sales Megawatt hours (1) (2) Natural gas purchases Decatherms 100 129
Eastern Energy Gas Holdings, LLC [Member]
Derivative [Line Items]
Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block]	The following table, which reflects master netting arrangements and excludes contracts that have been designated as normal under the normal purchases or normal sales exception afforded by GAAP, summarizes the fair value of Eastern Energy Gas' derivative contracts, on a gross basis, and reconciles those amounts to the amounts presented on a net basis on the Consolidated Balance Sheets (in millions): Other Other Other Current Other Current Long-term Assets Assets Liabilities Liabilities Total As of December 31, 2020: Designated as hedging contracts: Interest rate contracts $ — $ — $ (6) $ — $ (6) Foreign currency contracts — 20 (2) — 18 Not designated as hedging contracts: Commodity contracts — — (1) — (1) Total — 20 (9) — 11 Total derivatives — 20 (9) — 11 Cash collateral receivable — — — — — Total - net basis $ — $ 20 $ (9) $ — $ 11 As of December 31, 2019: Designated as hedging contracts: Interest rate contracts $ — $ — $ (30) $ (53) $ (83) Foreign currency contracts — 8 (3) — 5 Total — 8 (33) (53) (78) Total derivatives — 8 (33) (53) (78) Cash collateral receivable — — — — — Total - net basis $ — $ 8 $ (33) $ (53) $ (78)
Schedule of Derivative Instruments, Effect on Other Comprehensive Income (Loss) [Table Text Block]	The following table presents selected information related to losses on cash flow hedges included in AOCI in Eastern Energy Gas' Consolidated Balance Sheet as of December 31, 2020 (in millions): AOCI After-Tax Amounts Expected to be Reclassified to Earnings During the Next 12 Months After-Tax Maximum Term Interest rate $ (45) $ (5) 288 months Foreign currency (6) (2) 66 months Total $ (51) $ (7) The following tables present the gains and losses on Eastern Energy Gas' derivatives, as well as where the associated activity is presented in its Consolidated Balance Sheets and Consolidated Statements of Operations for the years ended December 31 (in millions): Derivatives in cash flow hedging relationships Amount of Gain (Loss) Recognized in AOCI on Derivatives (Effective Portion) (1) Amount of Gain (Loss) Reclassified from AOCI to Income 2020 Derivative type and location of gains (losses): Interest rate (2) $ (104) $ (157) Foreign currency (3) 12 25 Total $ (92) $ (132) 2019 Derivative type and location of gains (losses): Commodity: Net income from discontinued operations $ 4 Total commodity $ 1 $ 4 Interest rate (2) (68) (5) Foreign currency (3) (18) (6) Total $ (85) $ (7) 2018 Derivative type and location of gains (losses): Commodity: Net income from discontinued operations $ (8) Total commodity $ 1 $ (8) Interest rate (2) (16) (5) Foreign currency (3) (6) (13) Total $ (21) $ (26) (1) Amounts deferred into AOCI have no associated effect in Eastern Energy Gas' Consolidated Statements of Operations. (2) Amounts recorded in Eastern Energy Gas' Consolidated Statements of Operations are classified in interest expense. (3) Amounts recorded in Eastern Energy Gas' Consolidated Statements of Operations are classified in other, net.
Derivative Instruments, Gain (Loss) [Table Text Block]	Amount of Gain (Loss) Recognized in Income on Derivatives Derivatives not designated as hedging instruments 2020 2019 2018 Derivative type and location of gains (losses): Interest rate (1) $ 5 $ — $ — Commodity: Operating revenue (1) — (11) Total $ 4 $ — $ (11) (1) Amounts recorded in Eastern Energy Gas' Consolidated Statements of Operations are classified in interest expense.
Schedule of Notional Amounts of Outstanding Derivative Positions [Table Text Block]	The following table summarizes the net notional amounts of outstanding commodity derivative contracts with fixed price terms that comprise the mark-to-market values as of December 31 (in millions): Unit of Measure 2020 2019 Interest rate U.S. $ 500 1,300 Foreign currency Euro € 250 250 Natural gas Dth 5 —

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	12 Months Ended
	Dec. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Assets and Liabilities Net Measured On Recurring Basis Unobservable Input Reconciliation [Table Text Block]	The following table reconciles the beginning and ending balances of the Company's assets and liabilities measured at fair value on a recurring basis using significant Level 3 inputs for the years ended December 31 (in millions): Commodity Derivatives Interest Rate Derivatives 2020 2019 2018 2020 2019 2018 Beginning balance $ 97 $ 99 $ 94 $ 14 $ 10 $ 9 Changes included in earnings (10) 10 1 772 479 181 Changes in fair value recognized in OCI — (1) 2 — — — Changes in fair value recognized in net regulatory assets (17) (26) 3 — — — Purchases 5 6 3 — — — Settlements 41 9 (4) (724) (475) (180) Ending balance $ 116 $ 97 $ 99 $ 62 $ 14 $ 10
Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]	The following table presents the fair value of plan assets, by major category, for the Company's defined benefit pension plans (in millions): Input Levels for Fair Value Measurements (1) Level 1 Level 2 Total As of December 31, 2020: Cash equivalents $ — $ 79 $ 79 Debt securities: United States government obligations 52 — 52 Corporate obligations — 748 748 Municipal obligations — 69 69 Equity securities: United States companies 224 — 224 Total assets in the fair value hierarchy $ 276 $ 896 1,172 Investment funds (2) measured at net asset value 1,521 Limited partnership interests (3) measured at net asset value 88 Real estate funds measured at net asset value 43 Total assets measured at fair value $ 2,824 As of December 31, 2019: Cash equivalents $ 27 $ 36 $ 63 Debt securities: United States government obligations 210 — 210 International government obligations — 5 5 Corporate obligations — 376 376 Municipal obligations — 28 28 Agency, asset and mortgage-backed obligations — 115 115 Equity securities: United States companies 547 1 548 International companies 136 — 136 Investment funds (2) 125 — 125 Total assets in the fair value hierarchy $ 1,045 $ 561 1,606 Investment funds (2) measured at net asset value 915 Limited partnership interests (3) measured at net asset value 93 Real estate funds measured at net asset value 42 Total assets measured at fair value $ 2,656 (1) Refer to Note 15 for additional discussion regarding the three levels of the fair value hierarchy. (2) Investment funds are comprised of mutual funds and collective trust funds. These funds consist of equity and debt securities of approximately 69% and 31%, respectively, for 2020 and 62% and 38%, respectively, for 2019. Additionally, these funds are invested in United States and international securities of approximately 79% and 21%, respectively, for 2020 and 66% and 34%, respectively, for 2019. (3) Limited partnership interests include several funds that invest primarily in real estate, buyout, growth equity and venture capital. The following table presents the fair value of plan assets, by major category, for the Company's defined benefit other postretirement plans (in millions): Input Levels for Fair Value Measurements (1) Level 1 Level 2 Total As of December 31, 2020: Cash equivalents $ 20 $ 2 $ 22 Debt securities: United States government obligations 15 — 15 Corporate obligations — 102 102 Municipal obligations — 82 82 Agency, asset and mortgage-backed obligations — 47 47 Equity securities: United States companies 6 — 6 Investment funds (2) 299 — 299 Total assets in the fair value hierarchy $ 340 $ 233 573 Investment funds (2) measured at net asset value 167 Limited partnership interests (3) measured at net asset value 4 Total assets measured at fair value $ 744 As of December 31, 2019: Cash equivalents $ 17 $ 1 $ 18 Debt securities: United States government obligations 23 — 23 Corporate obligations — 44 44 Municipal obligations — 57 57 Agency, asset and mortgage-backed obligations — 33 33 Equity securities: United States companies 151 — 151 International companies 6 — 6 Investment funds (2) 236 — 236 Total assets in the fair value hierarchy $ 433 $ 135 568 Investment funds (2) measured at net asset value 169 Limited partnership interests (3) measured at net asset value 5 Total assets measured at fair value $ 742 (1) Refer to Note 15 for additional discussion regarding the three levels of the fair value hierarchy. (2) Investment funds are comprised of mutual funds and collective trust funds. These funds consist of equity and debt securities of approximately 40% and 60%, respectively, for 2020 and 58% and 42%, respectively, for 2019. Additionally, these funds are invested in United States and international securities of approximately 79% and 21%, respectively, for 2020 and 75% and 25%, respectively, for 2019. (3) Limited partnership interests include several funds that invest primarily in real estate, buyout, growth equity and venture capital. The following table presents the fair value of the UK Plan assets, by major category (in millions): Input Levels for Fair Value Measurements (1) Level 1 Level 2 Level 3 Total As of December 31, 2020: Cash equivalents $ 5 $ 49 $ — $ 54 Debt securities: United Kingdom government obligations 1,102 — — 1,102 Equity securities: Investment funds (2) — 833 — 833 Real estate funds — — 237 237 Total $ 1,107 $ 882 $ 237 2,226 Investment funds (2) measured at net asset value 108 Total assets measured at fair value $ 2,334 As of December 31, 2019: Cash equivalents $ 3 $ 24 $ — $ 27 Debt securities: United Kingdom government obligations 960 — — 960 Equity securities: Investment funds (2) — 818 — 818 Real estate funds — — 243 243 Total $ 963 $ 842 $ 243 2,048 Investment funds (2) measured at net asset value 103 Total assets measured at fair value $ 2,151 (1) Refer to Note 15 for additional discussion regarding the three levels of the fair value hierarchy. (2) Investment funds are comprised of mutual funds and collective trust funds. These funds consist of equity and debt securities of approximately 40% and 60%, respectively, for 2020 and 38% and 62%, respectively, for 2019. The following table presents the Company's assets and liabilities recognized on the Consolidated Balance Sheets and measured at fair value on a recurring basis (in millions): Input Levels for Fair Value Measurements Level 1 Level 2 Level 3 Other (1) Total As of December 31, 2020: Assets: Commodity derivatives $ 1 $ 73 $ 135 $ (21) $ 188 Foreign currency exchange rate derivatives — 20 — — 20 Interest rate derivatives — — 62 — 62 Mortgage loans held for sale — 2,001 — — 2,001 Money market mutual funds (2) 873 — — — 873 Debt securities: United States government obligations 200 — — — 200 International government obligations — 5 — — 5 Corporate obligations — 73 — — 73 Municipal obligations — 2 — — 2 Agency, asset and mortgage-backed obligations — 6 — — 6 Equity securities: United States companies 381 — — — 381 International companies 5,906 — — — 5,906 Investment funds 201 — — — 201 $ 7,562 $ 2,180 $ 197 $ (21) $ 9,918 Liabilities: Commodity derivatives $ (1) $ (90) $ (19) $ 56 $ (54) Foreign currency exchange rate derivatives — (2) — — (2) Interest rate derivatives (5) (60) — — (65) $ (6) $ (152) $ (19) $ 56 $ (121) As of December 31, 2019: Assets: Commodity derivatives $ — $ 45 $ 108 $ (24) $ 129 Interest rate derivatives — 2 14 — 16 Mortgage loans held for sale — 1,039 — — 1,039 Money market mutual funds (2) 824 — — — 824 Debt securities: United States government obligations 189 — — — 189 International government obligations — 4 — — 4 Corporate obligations — 58 — — 58 Municipal obligations — 1 — — 1 Agency, asset and mortgage-backed obligations — 1 — — 1 Equity securities: United States companies 336 — — — 336 International companies 1,131 — — — 1,131 Investment funds 169 — — — 169 $ 2,649 $ 1,150 $ 122 $ (24) $ 3,897 Liabilities: Commodity derivatives $ (4) $ (143) $ (11) $ 103 $ (55) Interest rate derivatives (2) (19) — — (21) $ (6) $ (162) $ (11) $ 103 $ (76) (1) Represents netting under master netting arrangements and a net cash collateral receivable of $35 million and $79 million as of December 31, 2020 and 2019, respectively. (2) Amounts are included in cash and cash equivalents; other current assets; and noncurrent investments and restricted cash and investments on the Consolidated Balance Sheets. The fair value of these money market mutual funds approximates cost.
Fair Value, by Balance Sheet Grouping [Table Text Block]	The following table presents the carrying value and estimated fair value of the Company's long-term debt as of December 31 (in millions): 2020 2019 Carrying Fair Carrying Fair Value Value Value Value Long-term debt $ 49,866 $ 60,633 $ 39,353 $ 46,004
PacifiCorp [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]	The following table presents the fair value of plan assets, by major category, for PacifiCorp's defined benefit pension plan (in millions): Input Levels for Fair Value Measurements Level 1 (1) Level 2 (1) Level 3 (1) Total As of December 31, 2020: Cash equivalents $ — $ 32 $ — $ 32 Debt securities: United States government obligations 14 — — 14 Corporate obligations — 231 — 231 Municipal obligations — 21 — 21 Equity securities: United States companies 91 — — 91 Total assets in the fair value hierarchy $ 105 $ 284 $ — 389 Investment funds (2) measured at net asset value 587 Limited partnership interests (3) measured at net asset value 88 Investments at fair value $ 1,064 As of December 31, 2019: Cash equivalents $ — $ 24 $ — $ 24 Debt securities: United States government obligations 21 — — 21 Corporate obligations — 94 — 94 Municipal obligations — 10 — 10 Agency, asset and mortgage-backed obligations — 42 — 42 Equity securities: United States companies 355 — — 355 International companies 15 — — 15 Investment funds (2) 55 — — 55 Total assets in the fair value hierarchy $ 446 $ 170 $ — 616 Investment funds (2) measured at net asset value 327 Limited partnership interests (3) measured at net asset value 93 Investments at fair value $ 1,036 (1) Refer to Note 13 for additional discussion regarding the three levels of the fair value hierarchy. (2) Investment funds are substantially comprised of mutual funds and collective trust funds. These funds consist of equity and debt securities of approximately 78% and 22%, respectively, for 2020 and 55% and 45%, respectively, for 2019, and are invested in United States and international securities of approximately 74% and 26%, respectively, for 2020 and 51% and 49%, respectively, for 2019. (3) Limited partnership interests include several funds that invest primarily in real estate. The following table presents the fair value of plan assets, by major category, for PacifiCorp's defined benefit other postretirement plan (in millions): Input Levels for Fair Value Measurements Level 1 (1) Level 2 (1) Level 3 (1) Total As of December 31, 2020: Cash and cash equivalents $ 8 $ 1 $ — $ 9 Debt securities: United States government obligations 11 — — 11 Corporate obligations — 86 — 86 Municipal obligations — 16 — 16 Agency, asset and mortgage-backed obligations — 44 — 44 Equity securities: United States companies 4 — — 4 Total assets in the fair value hierarchy 23 147 — 170 Investment funds (2) measured at net asset value 153 Limited partnership interests (3) measured at net asset value 4 Investments at fair value $ 327 As of December 31, 2019: Cash and cash equivalents $ 8 $ 1 $ — $ 9 Debt securities: United States government obligations 12 — — 12 Corporate obligations — 26 — 26 Municipal obligations — 2 — 2 Agency, asset and mortgage-backed obligations — 22 — 22 Equity securities: United States companies 74 — — 74 International companies 4 — — 4 Investment funds (2) 44 — — 44 Total assets in the fair value hierarchy 142 51 — 193 Investment funds (2) measured at net asset value 136 Limited partnership interests (3) measured at net asset value 5 Investments at fair value $ 334 (1) Refer to Note 13 for additional discussion regarding the three levels of the fair value hierarchy. (2) Investment funds are substantially comprised of mutual funds and collective trust funds. These funds consist of equity and debt securities of approximately 38% and 62%, respectively, for 2020 and 56% and 44%, respectively, for 2019, and are invested in United States and international securities of approximately 93% and 7%, respectively, for 2020 and 79% and 21%, respectively, for 2019. (3) Limited partnership interests include several funds that invest primarily in real estate, buyout, growth equity and venture capital. The following table presents PacifiCorp's assets and liabilities recognized on the Consolidated Balance Sheets and measured at fair value on a recurring basis (in millions): Input Levels for Fair Value Measurements Level 1 Level 2 Level 3 Other (1) Total As of December 31, 2020: Assets: Commodity derivatives $ — $ 36 $ — $ (3) $ 33 Money market mutual funds (2) 6 — — — 6 Investment funds 25 — — — 25 $ 31 $ 36 $ — $ (3) $ 64 Liabilities - Commodity derivatives $ — $ (53) $ — $ 27 $ (26) As of December 31, 2019: Assets: Commodity derivatives $ — $ 21 $ — $ (7) $ 14 Money market mutual funds (2) 23 — — — 23 Investment funds 25 — — — 25 $ 48 $ 21 $ — $ (7) $ 62 Liabilities - Commodity derivatives $ — $ (84) $ — $ 54 $ (30) (1) Represents netting under master netting arrangements and a net cash collateral receivable of $24 million and $47 million as of December 31, 2020 and 2019, respectively. (2) Amounts are included in cash and cash equivalents, other current assets and other assets on the Consolidated Balance Sheets. The fair value of these money market mutual funds approximates cost.
Fair Value, by Balance Sheet Grouping [Table Text Block]	The following table presents the carrying value and estimated fair value of PacifiCorp's long-term debt as of December 31 (in millions): 2020 2019 Carrying Fair Carrying Fair Value Value Value Value Long-term debt $ 8,612 $ 10,995 $ 7,658 $ 9,280
MidAmerican Energy Company [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]	The following table presents the fair value of plan assets, by major category, for MidAmerican Energy's defined benefit pension plan (in millions): Input Levels for Fair Value Measurements (1) Level 1 Level 2 Level 3 Total As of December 31, 2020: Cash equivalents $ — $ 26 $ — $ 26 Debt securities: United States government obligations 14 — — 14 Corporate obligations — 160 — 160 Municipal obligations — 17 — 17 Equity securities: United States companies 65 — — 65 Total assets in the hierarchy $ 79 $ 203 $ — 282 Investment funds (2) measured at net asset value 393 Real estate funds measured at net asset value 43 Total assets measured at fair value $ 718 As of December 31, 2019: Cash equivalents $ 21 $ — $ — $ 21 Debt securities: United States government obligations 16 — — 16 Corporate obligations — 61 — 61 Municipal obligations — 5 — 5 Agency, asset and mortgage-backed obligations — 33 — 33 Equity securities: United States companies 129 — — 129 International companies 42 — — 42 Investment funds (2) 69 — — 69 Total assets in the hierarchy $ 277 $ 99 $ — 376 Investment funds (2) measured at net asset value 299 Real estate funds measured at net asset value 42 Total assets measured at fair value $ 717 (1) Refer to Note 12 for additional discussion regarding the three levels of the fair value hierarchy. (2) Investment funds are comprised of mutual funds and collective trust funds. These funds consist of equity and debt securities of approximately 65% and 35%, respectively, for 2020 and 69% and 31%, respectively, for 2019. Additionally, these funds are invested in United States and international securities of approximately 82% and 18%, respectively, for 2020 and 74% and 26%, respectively, for 2019. The following table presents the fair value of plan assets, by major category, for MidAmerican Energy's defined benefit other postretirement plans (in millions): Input Levels for Fair Value Measurements (1) Level 1 Level 2 Level 3 Total As of December 31, 2020: Cash equivalents $ 11 $ — $ — $ 11 Debt securities: United States government obligations 3 — — 3 Corporate obligations — 7 — 7 Municipal obligations — 65 — 65 Agency, asset and mortgage-backed obligations — 3 — 3 Equity securities: Investment funds (2) 189 — — 189 Total assets measured at fair value $ 203 $ 75 $ — $ 278 As of December 31, 2019: Cash equivalents $ 6 $ — $ — $ 6 Debt securities: United States government obligations 6 — — 6 Corporate obligations — 12 — 12 Municipal obligations — 55 — 55 Agency, asset and mortgage-backed obligations — 10 — 10 Equity securities: United States companies 75 — — 75 Investment funds (2) 108 — — 108 Total assets measured at fair value $ 195 $ 77 $ — $ 272 (1) Refer to Note 12 for additional discussion regarding the three levels of the fair value hierarchy. (2) Investment funds are comprised of mutual funds and collective trust funds. These funds consist of equity and debt securities of approximately 56% and 44%, respectively, for 2020 and 77% and 23%, respectively, for 2019. Additionally, these funds are invested in United States and international securities of approximately 56% and 44%, respectively, for 2020 and 42% and 58%, respectively, for 2019. The following table presents MidAmerican Energy's assets and liabilities recognized on the Balance Sheets and measured at fair value on a recurring basis (in millions): Input Levels for Fair Value Measurements Level 1 Level 2 Level 3 Other (1) Total As of December 31, 2020: Assets: Commodity derivatives $ — $ 4 $ 5 $ (5) $ 4 Money market mutual funds (2) 41 — — — 41 Debt securities: United States government obligations 200 — — — 200 International government obligations — 5 — — 5 Corporate obligations — 73 — — 73 Municipal obligations — 2 — — 2 Agency, asset and mortgage-backed obligations — 6 — — 6 Equity securities: United States companies 381 — — — 381 International companies 9 — — — 9 Investment funds 17 — — — 17 $ 648 $ 90 $ 5 $ (5) $ 738 Liabilities - commodity derivatives $ — $ (4) $ (3) $ 5 $ (2) As of December 31, 2019 Assets: Commodity derivatives $ — $ 2 $ 1 $ (1) $ 2 Money market mutual funds (2) 274 — — — 274 Debt securities: United States government obligations 189 — — — 189 International government obligations — 4 — — 4 Corporate obligations — 58 — — 58 Municipal obligations — 1 — — 1 Agency, asset and mortgage-backed obligations — 1 — — 1 Equity securities: United States companies 336 — — — 336 International companies 9 — — — 9 Investment funds 15 — — — 15 $ 823 $ 66 $ 1 $ (1) $ 889 Liabilities - commodity derivatives $ — $ (9) $ — $ 2 $ (7) (1) Represents netting under master netting arrangements and a net cash collateral receivable of $— million and $1 million as of December 31, 2020 and 2019, respectively. (2) Amounts are included in cash and cash equivalents and investments and restricted investments on the Balance Sheets. The fair value of these money market mutual funds approximates cost.
Fair Value, by Balance Sheet Grouping [Table Text Block]	The following table presents the carrying value and estimated fair value of MidAmerican Energy's long-term debt as of December 31 (in millions): 2020 2019 Carrying Value Fair Value Carrying Value Fair Value Long-term debt $ 7,210 $ 9,130 $ 7,208 $ 8,283
MidAmerican Funding, LLC and Subsidiaries [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, by Balance Sheet Grouping [Table Text Block]	The following table presents the carrying value and estimated fair value of MidAmerican Funding's long-term debt as of December 31 (in millions): 2020 2019 Carrying Value Fair Value Carrying Value Fair Value Long-term debt $ 7,450 $ 9,466 $ 7,448 $ 8,599
Nevada Power Company [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]	The following table presents Nevada Power's assets and liabilities recognized on the Consolidated Balance Sheets and measured at fair value on a recurring basis (in millions): Input Levels for Fair Value Measurements Level 1 Level 2 Level 3 Total As of December 31, 2020: Assets: Commodity derivatives $ — $ — $ 26 $ 26 Money market mutual funds (1) 21 — — 21 Investment funds 2 — — 2 $ 23 $ — $ 26 $ 49 Liabilities - commodity derivatives $ — $ — $ (11) $ (11) As of December 31, 2019: Assets: Money market mutual funds (1) 10 — — 10 Investment funds 2 — — 2 $ 12 $ — $ — $ 12 Liabilities - commodity derivatives $ — $ — $ (8) $ (8) (1) Amounts are included in cash and cash equivalents on the Consolidated Balance Sheets. The fair value of these money market mutual funds approximates cost.
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]	The following table reconciles the beginning and ending balances of Nevada Power's net commodity derivative assets or liabilities measured at fair value on a recurring basis using significant Level 3 inputs for the years ended December 31 (in millions): 2020 2019 2018 Beginning balance $ (8) $ 3 $ (3) Changes in fair value recognized in regulatory assets or liabilities (17) (21) 4 Settlements 40 10 2 Ending balance $ 15 $ (8) $ 3
Fair Value, by Balance Sheet Grouping [Table Text Block]	The following table presents the carrying value and estimated fair value of Nevada Power's long-term debt as of December 31 (in millions): 2020 2019 Carrying Fair Carrying Fair Value Value Value Value Long-term debt $ 2,496 $ 3,245 $ 2,351 $ 2,848
Sierra Pacific Power Company [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]	The following table presents Sierra Pacific's assets and liabilities recognized on the Balance Sheets and measured at fair value on a recurring basis (in millions): Input Levels for Fair Value Measurements Level 1 Level 2 Level 3 Total As of December 31, 2020: Assets: Commodity derivatives $ — $ — $ 9 $ 9 Money market mutual funds (1) 17 — — 17 Investment funds $ — $ 17 $ — $ 9 $ 26 Liabilities - commodity derivatives $ — $ — $ (2) $ (2) As of December 31, 2019: Assets - money market mutual funds (1) $ 25 $ — $ — $ 25 Liabilities - commodity derivatives $ — $ — $ (1) $ (1) (1) Amounts are included in cash and cash equivalents on the Balance Sheets. The fair value of these money market mutual funds approximates cost.
Fair Value, by Balance Sheet Grouping [Table Text Block]	The following table presents the carrying value and estimated fair value of Sierra Pacific's long-term debt as of December 31 (in millions): 2020 2019 Carrying Fair Carrying Fair Value Value Value Value Long-term debt $ 1,164 $ 1,358 $ 1,135 $ 1,258
Eastern Energy Gas Holdings, LLC [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]	The following table presents the fair value of plan assets, by major category, for Eastern Energy Gas' defined benefit pension plan as of December 31, 2019 (in millions): Input Levels for Fair Value Measurements Level 1 (1) Level 2 (1) Level 3 (1) Total Cash and cash equivalents $ 1 $ — $ — $ 1 Debt securities: United States government obligations 2 59 — 61 Corporate obligations 3 66 — 69 Insurance contracts — 28 — 28 Equity securities: United States equity securities 177 — — 177 International equity securities 114 — — 114 Total assets in the fair value hierarchy $ 297 $ 153 $ — 450 Investment funds measured at net asset value 238 Investments at fair value $ 688 (1) Refer to Note 15 for additional discussion regarding the three levels of the fair value hierarchy. The following table presents the fair value of plan assets, by major category, for Eastern Energy Gas' defined benefit other postretirement plan as of December 31, 2019 (in millions): Input Levels for Fair Value Measurements Level 1 (1) Level 2 (1) Level 3 (1) Total Equity securities: United States equity securities $ 86 $ — $ — $ 86 International equity securities 21 — — 21 Total assets in the fair value hierarchy $ 107 $ — $ — 107 Investment funds measured at net asset value 120 Investments at fair value $ 227 (1) Refer to Note 15 for additional discussion regarding the three levels of the fair value hierarchy.
Fair Value, by Balance Sheet Grouping [Table Text Block]	The following table presents the carrying value and estimated fair value of Eastern Energy Gas' long-term debt as of December 31 (in millions): 2020 2019 Carrying Fair Carrying Fair Value Value Value Value Long-term debt $ 4,425 $ 5,012 $ 5,520 $ 5,738

Other, Net (Tables)

Other, Net (Tables)	12 Months Ended
	Dec. 31, 2020
MidAmerican Energy Company [Member]
Component of Other Income (Expense), Nonoperating [Line Items]
Schedule of Other Nonoperating Income (Expense) [Table Text Block]	Other, net, as shown on the Statements of Operations, includes the following other income (expense) items for the years ended December 31 (in millions): 2020 2019 2018 Non-service cost components of postretirement employee benefit plans $ 24 $ 17 $ 21 Corporate-owned life insurance income 16 24 6 Gains on disposition of assets 6 — — Interest income and other, net 6 9 3 Total $ 52 $ 50 $ 30
MidAmerican Funding, LLC and Subsidiaries [Member]
Component of Other Income (Expense), Nonoperating [Line Items]
Schedule of Other Nonoperating Income (Expense) [Table Text Block]	Other, net, as shown on the Consolidated Statements of Operations, includes the following other income (expense) items for the years ended December 31 (in millions): 2020 2019 2018 Non-service cost components of postretirement employee benefit plans $ 24 $ 17 $ 21 Corporate-owned life insurance income 16 24 6 Gains on disposition of assets 6 — — Interest income and other, net 6 11 4 Total $ 52 $ 52 $ 31

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2020
Schedule of Effective Income Tax Rate Reconciliation [Line Items]
Components of Income Tax Expense (Benefit) [Table Text Block]	Income tax (benefit) expense consists of the following for the years ended December 31 (in millions): 2020 2019 2018 Current: Federal $ (1,537) $ (956) $ (686) State (121) (13) (9) Foreign 86 81 104 (1,572) (888) (591) Deferred: Federal 1,438 431 165 State 424 (127) (131) Foreign 21 (8) (20) 1,883 296 14 Investment tax credits (3) (6) (6) Total $ 308 $ (598) $ (583)
Effective Income Tax Rate Reconciliation [Table Text Block]	A reconciliation of the federal statutory income tax rate to the effective income tax rate applicable to income before income tax expense (benefit) is as follows for the years ended December 31: 2020 2019 2018 Federal statutory income tax rate 21 % 21 % 21 % Income tax credits (16) (32) (30) Effects of ratemaking (3) (6) (8) State income tax, net of federal income tax benefit 3 (5) (6) Effects of tax rate change and repatriation tax — — (4) Income tax effect of foreign income — (2) (3) Equity income — — 1 Other, net (1) (1) (1) Effective income tax rate 4 % (25) % (30) %
Components of Net Deferred Income Tax Liability [Table Text Block]	The net deferred income tax liability consists of the following as of December 31 (in millions): 2020 2019 Deferred income tax assets: Regulatory liabilities $ 1,420 $ 1,610 Federal, state and foreign carryforwards 677 575 AROs 304 306 Other 777 590 Total deferred income tax assets 3,178 3,081 Valuation allowances (204) (143) Total deferred income tax assets, net 2,974 2,938 Deferred income tax liabilities: Property-related items (10,816) (10,439) Investments (2,821) (1,137) Regulatory assets (785) (631) Other (327) (384) Total deferred income tax liabilities (14,749) (12,591) Net deferred income tax liability $ (11,775) $ (9,653)
Summary of Operating Loss Carryforwards [Table Text Block]	The following table provides the Company's net operating loss and tax credit carryforwards and expiration dates as of December 31, 2020 (in millions): Federal State Foreign Total Net operating loss carryforwards (1) $ 302 $ 7,190 $ 704 $ 8,196 Deferred income taxes on net operating loss carryforwards 63 409 162 634 Expiration dates 2021 - indefinite 2021 - indefinite 2021 - 2039 Tax credits $ 15 $ 28 $ — $ 43 Expiration dates 2023 - 2026 2021 - indefinite (1) The federal net operating loss carryforwards relate principally to net operating loss carryforwards of subsidiaries that are tax residents in both the United States and the United Kingdom. The federal net operating loss carryforwards were generated prior to Berkshire Hathaway Inc.'s ownership and will begin to expire in 2021.
Net Unrecognized Tax Benefits Roll Forward [Table Text Block]	A reconciliation of the beginning and ending balances of the Company's net unrecognized tax benefits is as follows for the years ended December 31 (in millions): 2020 2019 Beginning balance $ 145 $ 185 Additions based on tax positions related to the current year 5 3 Additions for tax positions of prior years 6 13 Reductions for tax positions of prior years (1) (37) Statute of limitations (4) (9) Settlements 1 (5) Interest and penalties 1 (5) Ending balance $ 153 $ 145
PacifiCorp [Member]
Schedule of Effective Income Tax Rate Reconciliation [Line Items]
Components of Income Tax Expense (Benefit) [Table Text Block]	Income tax expense (benefit) consists of the following for the years ended December 31 (in millions): 2020 2019 2018 Current: Federal $ 19 $ 158 $ 164 State 30 34 40 Total 49 192 204 Deferred: Federal (124) (132) (187) State 1 4 (9) Total (123) (128) (196) Investment tax credits (1) (3) (3) Total income tax (benefit) expense $ (75) $ 61 $ 5
Effective Income Tax Rate Reconciliation [Table Text Block]	A reconciliation of the federal statutory income tax rate to the effective income tax rate applicable to income before income tax expense is as follows for the years ended December 31: 2020 2019 2018 Federal statutory income tax rate 21 % 21 % 21 % State income taxes, net of federal income tax benefit 3 3 4 Effects of ratemaking (22) (13) (17) Federal income tax credits (13) (3) (7) Other — (1) — Effective income tax rate (11) % 7 % 1 %
Components of Net Deferred Income Tax Liability [Table Text Block]	The net deferred income tax liability consists of the following as of December 31 (in millions): 2020 2019 Deferred income tax assets: Regulatory liabilities $ 700 $ 731 Employee benefits 93 83 Derivative contracts and unamortized contract values 17 33 State carryforwards 73 70 Loss contingencies 63 3 Asset retirement obligations 65 61 Other 66 65 1,077 1,046 Deferred income tax liabilities: Property, plant and equipment (3,311) (3,312) Regulatory assets (343) (276) Other (50) (21) (3,704) (3,609) Net deferred income tax liability $ (2,627) $ (2,563)
Summary of Operating Loss Carryforwards [Table Text Block]	The following table provides PacifiCorp's net operating loss and tax credit carryforwards and expiration dates as of December 31, 2020 (in millions): State Net operating loss carryforwards $ 1,138 Deferred income taxes on net operating loss carryforwards $ 53 Expiration dates 2023 - 2032 Tax credit carryforwards $ 20 Expiration dates 2021 - indefinite
MidAmerican Energy Company [Member]
Schedule of Effective Income Tax Rate Reconciliation [Line Items]
Components of Income Tax Expense (Benefit) [Table Text Block]	MidAmerican Energy's income tax benefit consists of the following for the years ended December 31 (in millions): 2020 2019 2018 Current: Federal $ (684) $ (478) $ (276) State (94) (47) (12) (778) (525) (288) Deferred: Federal 201 166 42 State 8 (11) (8) 209 155 34 Investment tax credits (1) (1) (1) Total $ (570) $ (371) $ (255)
Effective Income Tax Rate Reconciliation [Table Text Block]	A reconciliation of the federal statutory income tax rate to MidAmerican Energy's effective income tax rate applicable to income before income tax benefit is as follows for the years ended December 31: 2020 2019 2018 Federal statutory income tax rate 21 % 21 % 21 % Income tax credits (199) (90) (73) State income tax, net of federal income tax benefit (27) (11) (4) Effects of ratemaking (17) (8) (5) Other, net (1) — 1 Effective income tax rate (223) % (88) % (60) %
Components of Net Deferred Income Tax Liability [Table Text Block]	MidAmerican Energy's net deferred income tax liability consists of the following as of December 31 (in millions): 2020 2019 Deferred income tax assets: Regulatory liabilities $ 288 $ 368 Asset retirement obligations 229 234 State carryforwards 52 51 Employee benefits 42 26 Other 40 34 Total deferred income tax assets 651 713 Valuation allowances (25) (14) Total deferred income tax assets, net 626 699 Deferred income tax liabilities: Depreciable property (3,583) (3,253) Regulatory assets (97) (68) Other — (4) Total deferred income tax liabilities (3,680) (3,325) Net deferred income tax liability $ (3,054) $ (2,626)
Net Unrecognized Tax Benefits Roll Forward [Table Text Block]	A reconciliation of the beginning and ending balances of MidAmerican Energy's net unrecognized tax benefits is as follows for the years ended December 31 (in millions): 2020 2019 Beginning balance $ 8 $ 10 Additions based on tax positions related to the current year 4 5 Additions for tax positions of prior years — 10 Reductions based on tax positions related to the current year (3) (5) Reductions for tax positions of prior years (1) (12) Ending balance $ 8 $ 8
MidAmerican Funding, LLC and Subsidiaries [Member]
Schedule of Effective Income Tax Rate Reconciliation [Line Items]
Components of Income Tax Expense (Benefit) [Table Text Block]	MidAmerican Funding's income tax benefit consists of the following for the years ended December 31 (in millions): 2020 2019 2018 Current: Federal $ (689) $ (480) $ (280) State (96) (49) (14) (785) (529) (294) Deferred: Federal 204 164 42 State 8 (11) (9) 212 153 33 Investment tax credits (1) (1) (1) Total $ (574) $ (377) $ (262)
Effective Income Tax Rate Reconciliation [Table Text Block]	A reconciliation of the federal statutory income tax rate to MidAmerican Funding's effective income tax rate applicable to income before income tax benefit is as follows for the years ended December 31: 2020 2019 2018 Federal statutory income tax rate 21 % 21 % 21 % Income tax credits (209) (94) (76) State income tax, net of federal income tax benefit (29) (12) (4) Effects of ratemaking (17) (8) (6) Other, net (1) — 1 Effective income tax rate (235) % (93) % (64) %
Components of Net Deferred Income Tax Liability [Table Text Block]	MidAmerican Funding's net deferred income tax liability consists of the following as of December 31 (in millions): 2020 2019 Deferred income tax assets: Regulatory liabilities $ 288 $ 368 Asset retirement obligations 229 234 State carryforwards 52 51 Employee benefits 43 26 Other 40 39 Total deferred income tax assets 652 718 Valuation allowances (25) (14) Total deferred income tax assets, net 627 704 Deferred income tax liabilities: Depreciable property (3,583) (3,253) Regulatory assets (97) (68) Other 1 (4) Total deferred income tax liabilities (3,679) (3,325) Net deferred income tax liability $ (3,052) $ (2,621)
Net Unrecognized Tax Benefits Roll Forward [Table Text Block]	A reconciliation of the beginning and ending balances of MidAmerican Funding's net unrecognized tax benefits is as follows for the years ended December 31 (in millions): 2020 2019 Beginning balance $ 8 $ 10 Additions based on tax positions related to the current year 4 5 Additions for tax positions of prior years — 10 Reductions based on tax positions related to the current year (3) (5) Reductions for tax positions of prior years (1) (12) Ending balance $ 8 $ 8
Nevada Power Company [Member]
Schedule of Effective Income Tax Rate Reconciliation [Line Items]
Components of Income Tax Expense (Benefit) [Table Text Block]	Income tax expense (benefit) consists of the following for the years ended December 31 (in millions): 2020 2019 2018 Current – Federal $ 57 $ 105 $ 84 Deferred – Federal (10) (31) (13) Uncertain tax positions — — 2 Investment tax credits — (1) (1) Total income tax expense $ 47 $ 73 $ 72
Effective Income Tax Rate Reconciliation [Table Text Block]	A reconciliation of the federal statutory income tax rate to the effective income tax rate applicable to income before income tax expense is as follows for the years ended December 31: 2020 2019 2018 Federal statutory income tax rate 21 % 21 % 21 % Effects of ratemaking (8) — — Non-deductible expenses — — 3 Other 1 1 — Effective income tax rate 14 % 22 % 24 %
Components of Net Deferred Income Tax Liability [Table Text Block]	The net deferred income tax liability consists of the following as of December 31 (in millions): 2020 2019 Deferred income tax assets: Regulatory liabilities $ 206 $ 211 Operating and finance leases 79 99 Employee benefits 8 14 Customer advances 19 19 Other 15 9 Total deferred income tax assets 327 352 Deferred income tax liabilities: Property related items (800) (797) Regulatory assets (176) (166) Operating and finance leases (76) (95) Other (13) (8) Total deferred income tax liabilities (1,065) (1,066) Net deferred income tax liability $ (738) $ (714)
Sierra Pacific Power Company [Member]
Schedule of Effective Income Tax Rate Reconciliation [Line Items]
Components of Income Tax Expense (Benefit) [Table Text Block]	Income tax expense (benefit) consists of the following for the years ended December 31 (in millions): 2020 2019 2018 Current – Federal $ 3 $ 19 $ 23 Deferred – Federal 12 10 7 Uncertain tax positions — — 1 Investment tax credits — (1) (1) Total income tax expense $ 15 $ 28 $ 30
Effective Income Tax Rate Reconciliation [Table Text Block]	A reconciliation of the federal statutory income rate to the effective income tax rate applicable to income before income tax expense is as follows for the years ended December 31: 2020 2019 2018 Federal statutory income tax rate 21 % 21 % 21 % Effects of ratemaking (9) — — Non-deductible expenses — — 4 Effective income tax rate 12 % 21 % 25 %
Components of Net Deferred Income Tax Liability [Table Text Block]	The net deferred income tax liability consists of the following as of December 31 (in millions): 2020 2019 Deferred income tax assets: Regulatory liabilities $ 67 $ 70 Employee benefit plans 2 6 Operating and finance leases 30 13 Customer advances 10 9 Other 8 6 Total deferred income tax assets 117 104 Deferred income tax liabilities: Property related items (380) (370) Regulatory assets (74) (62) Operating and finance leases (30) (13) Other (7) (6) Total deferred income tax liabilities (491) (451) Net deferred income tax liability $ (374) $ (347)
Eastern Energy Gas Holdings, LLC [Member]
Schedule of Effective Income Tax Rate Reconciliation [Line Items]
Components of Income Tax Expense (Benefit) [Table Text Block]	Income tax (benefit) expense consists of the following for the years ended December 31 (in millions): 2020 2019 2018 Current: Federal $ (20) $ 130 $ (227) State 1 17 31 (19) 147 (196) Deferred: Federal 23 (36) 337 State (28) (10) (17) (5) (46) 320 Total $ (24) $ 101 $ 124
Effective Income Tax Rate Reconciliation [Table Text Block]	A reconciliation of the federal statutory income tax rate to the effective income tax rate applicable to income before income tax (benefit) expense is as follows for the years ended December 31: 2020 2019 2018 Federal statutory income tax rate 21 % 21 % 21 % State income tax, net of federal income tax benefit (13) 1 2 Equity interest 4 1 2 Effects of ratemaking (2) (1) (1) Federal legislative changes — — (1) Change in tax status (9) (4) — AFUDC-equity (1) (1) — Absence of noncontrolling interest (16) (3) (5) Write-off of regulatory assets 3 — — Other, net 1 (1) — Effective income tax rate (12) % 13 % 18 %
Components of Net Deferred Income Tax Liability [Table Text Block]	The net deferred income tax asset (liability) consists of the following as of December 31 (in millions): 2020 2019 Deferred income tax assets: Employee benefits $ 30 $ 15 Intangibles 148 — Derivatives and hedges 18 28 Regulatory liabilities 1 4 Deferred revenues 1 4 Other 2 2 Total deferred income tax assets 200 53 Valuation allowance — (1) Total deferred income tax assets, net 200 52 Deferred income tax liabilities: Property related items (52) (695) Partnership investments (19) (438) Pension benefits (1) (202) Debt issuance discount (8) — Other (1) (5) Total deferred income tax liabilities (81) (1,340) Net deferred income tax asset (liability) (1) $ 119 $ (1,288) (1) Net deferred income tax asset as of December 31, 2020 is presented in other assets in the Consolidated Balance Sheet.
Net Unrecognized Tax Benefits Roll Forward [Table Text Block]	A reconciliation of the beginning and ending balances of Eastern Energy Gas' net unrecognized tax benefits is as follows for the years ended December 31 (in millions): 2020 2019 Beginning balance $ 2 $ 2 Additions for tax positions of prior years 5 — Reductions for unrecognized tax benefits retained by DEI (7) — Ending balance $ — $ 2

Supplemental Cash Flow Disclo_2

Supplemental Cash Flow Disclosures (Tables)	12 Months Ended
	Dec. 31, 2020
Condensed Cash Flow Statements, Captions [Line Items]
Schedule of Cash Flow, Supplemental Disclosures [Table Text Block]	The summary of supplemental cash flow disclosures as of and for the years ending December 31 is as follows (in millions): 2020 2019 2018 Supplemental disclosure of cash flow information: Interest paid, net of amounts capitalized $ 1,855 $ 1,723 $ 1,713 Income taxes received, net (1) $ 1,361 $ 850 $ 780 Supplemental disclosure of non-cash investing and financing transactions: Accruals related to property, plant and equipment additions $ 801 $ 888 $ 823 (1) Includes $1,504 million, $942 million and $884 million of income taxes received from Berkshire Hathaway in 2020, 2019 and 2018, respectively.
PacifiCorp [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Schedule of Cash Flow, Supplemental Disclosures [Table Text Block]	The summary of supplemental cash flow disclosures as of and for the years ended December 31 is as follows (in millions): 2020 2019 2018 Interest paid, net of amounts capitalized $ 348 $ 340 $ 347 Income taxes paid, net $ 107 $ 171 $ 144 Supplemental disclosure of non-cash investing and financing activities: Accounts payable related to property, plant and equipment additions $ 344 $ 293 $ 184
MidAmerican Energy Company [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Schedule of Cash Flow, Supplemental Disclosures [Table Text Block]	A reconciliation of cash and cash equivalents and restricted cash and cash equivalents as of December 31, 2020 and 2019 as presented in the Statements of Cash Flows is outlined below and disaggregated by the line items in which they appear on the Balance Sheets (in millions): As of December 31, 2020 2019 Cash and cash equivalents $ 38 $ 287 Restricted cash and cash equivalents in other current assets 7 43 Total cash and cash equivalents and restricted cash and cash equivalents $ 45 $ 330 The summary of supplemental cash flow disclosures as of and for the years ending December 31 is as follows (in millions): 2020 2019 2018 Supplemental cash flow information: Interest paid, net of amounts capitalized $ 286 $ 224 $ 198 Income taxes received, net $ 709 $ 450 $ 494 Supplemental disclosure of non-cash investing transactions: Accounts payable related to utility plant additions $ 227 $ 337 $ 371
MidAmerican Funding, LLC and Subsidiaries [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Schedule of Cash Flow, Supplemental Disclosures [Table Text Block]	A reconciliation of cash and cash equivalents and restricted cash and cash equivalents as of December 31, 2020 and 2019 as presented in the Consolidated Statements of Cash Flows is outlined below and disaggregated by the line items in which they appear on the Consolidated Balance Sheets (in millions): As of December 31, 2020 2019 Cash and cash equivalents $ 39 $ 288 Restricted cash and cash equivalents in other current assets 7 43 Total cash and cash equivalents and restricted cash and cash equivalents $ 46 $ 331 The summary of supplemental cash flow information as of and for the years ending December 31 is as follows (in millions): 2020 2019 2018 Supplemental cash flow information: Interest paid, net of amounts capitalized $ 302 $ 245 $ 218 Income taxes received, net $ 715 $ 456 $ 511 Supplemental disclosure of non-cash investing and financing transactions: Accounts payable related to utility plant additions $ 227 $ 337 $ 371 Distribution of corporate aircraft to parent $ — $ 8 $ —
Nevada Power Company [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Schedule of Cash Flow, Supplemental Disclosures [Table Text Block]	A reconciliation of cash and cash equivalents and restricted cash and cash equivalents as of December 31, 2020 and December 31, 2019, as presented in the Consolidated Statements of Cash Flows is outlined below and disaggregated by the line items in which they appear on the Consolidated Balance Sheets (in millions): As of December 31, December 31, 2020 2019 Cash and cash equivalents $ 25 $ 15 Restricted cash and cash equivalents included in other current assets 11 10 Total cash and cash equivalents and restricted cash and cash equivalents $ 36 $ 25 The summary of supplemental cash flow disclosures as of and for the years ended December 31 is as follows (in millions): 2020 2019 2018 Supplemental disclosure of cash flow information: Interest paid, net of amounts capitalized $ 115 $ 126 $ 166 Income taxes paid $ 50 $ 113 $ 117 Supplemental disclosure of non-cash investing and financing transactions: Accruals related to property, plant and equipment additions $ 32 $ 49 $ 34
Sierra Pacific Power Company [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Schedule of Cash Flow, Supplemental Disclosures [Table Text Block]	A reconciliation of cash and cash equivalents and restricted cash and cash equivalents as of December 31, 2020 and December 31, 2019, as presented in the Statements of Cash Flows is outlined below and disaggregated by the line items in which they appear on the Balance Sheets (in millions): As of December 31, December 31, 2020 2019 Cash and cash equivalents $ 19 $ 27 Restricted cash and cash equivalents included in other current assets 7 5 Total cash and cash equivalents and restricted cash and cash equivalents $ 26 $ 32 The summary of supplemental cash flow disclosures as of and for the years ended December 31 is as follows (in millions): 2020 2019 2018 Supplemental disclosure of cash flow information: Interest paid, net of amounts capitalized $ 42 $ 41 $ 41 Income taxes paid $ 2 $ 37 $ 19 Supplemental disclosure of non-cash investing and financing transactions: Accruals related to property, plant and equipment additions $ 17 $ 18 $ 15
Eastern Energy Gas Holdings, LLC [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Schedule of Cash Flow, Supplemental Disclosures [Table Text Block]	A reconciliation of cash and cash equivalents and restricted cash and cash equivalents as of December 31, 2020 and December 31, 2019, as presented in the Consolidated Statements of Cash Flows is outlined below and disaggregated by the line items in which they appear on the Consolidated Balance Sheets (in millions): As of December 31, December 31, 2020 2019 Cash and cash equivalents $ 35 $ 27 Restricted cash and cash equivalents 13 12 Total cash and cash equivalents and restricted cash and cash equivalents $ 48 $ 39 The summary of supplemental cash flow disclosures as of and for the years ending December 31 is as follows (in millions): 2020 2019 2018 Supplemental disclosure of cash flow information: Interest paid, net of amounts capitalized $ 317 $ 291 $ 162 Income taxes paid $ 31 $ 65 $ 79 Supplemental disclosure of non-cash investing and financing transactions: Accruals related to property, plant and equipment additions $ 30 $ 25 $ 59 Distribution of Questar Pipeline Group $ (699) $ — $ — Distribution of 50% interest in Cove Point $ (2,765) $ — $ — Acquisition of Eastern Energy Gas by BHE $ 343 $ — $ — Equity contributions $ — $ — $ 23

Related Party Transactions (Tab

Related Party Transactions (Tables)	12 Months Ended
	Dec. 31, 2020
Eastern Energy Gas Holdings, LLC [Member]
Related Party Transaction [Line Items]
Schedule of Related Party Transactions	Presented below are Eastern Energy Gas' significant transactions with DES, Carolina Gas Services, DEQPS and other affiliated and related parties for the years ended December 31 (in millions): 2020 2019 2018 Sales of natural gas and transportation and storage services $ 207 $ 249 $ 168 Purchases of natural gas and transportation and storage services 10 12 — Services provided by related parties (1) 129 226 169 Services provided to related parties (2) 83 164 260 (1) Includes capitalized expenditures of $14 million, $19 million and $37 million for the years ended December 31, 2020, 2019 and 2018, respectively. (2) Includes amounts attributable to Atlantic Coast Pipeline, a related-party VIE prior to the GT&S Transaction. See below for more information. The following table presents affiliated and related party balances as of December 31 (in millions): 2019 Other receivables (1) $ 7 Imbalances receivable from affiliates (2) 8 Imbalances payable to affiliates (3) 1 Other assets 12 (1) Represents amounts due from Atlantic Coast Pipeline. (2) Amounts are presented in other current assets on the Consolidated Balance Sheet. (3) Amounts are presented in other current liabilities on the Consolidated Balance Sheet.

Employee Benefit Plans (Tables)

Employee Benefit Plans (Tables)	12 Months Ended
	Dec. 31, 2020
Defined Benefit Plan Disclosure [Line Items]
Schedule of Net Benefit Costs [Table Text Block]	Net periodic benefit cost for the plans included the following components for the years ended December 31 (in millions): Pension Other Postretirement 2020 2019 2018 2020 2019 2018 Service cost $ 17 $ 16 $ 21 $ 7 $ 8 $ 9 Interest cost 93 111 105 21 27 24 Expected return on plan assets (140) (154) (164) (34) (40) (41) Settlement — — 21 — — — Net amortization 32 31 28 (4) (6) (13) Net periodic benefit cost (credit) $ 2 $ 4 $ 11 $ (10) $ (11) $ (21) Net periodic benefit cost for the UK Plan included the following components for the years ended December 31 (in millions): 2020 2019 2018 Service cost $ 16 $ 16 $ 19 Interest cost 40 49 56 Expected return on plan assets (101) (100) (101) Settlement 17 26 44 Net amortization 43 46 45 Net periodic benefit cost $ 15 $ 37 $ 63
Changes in Fair Value of Plan Assets [Table Text Block]	The following table is a reconciliation of the fair value of plan assets for the years ended December 31 (in millions): Pension Other Postretirement 2020 2019 2020 2019 Plan assets at fair value, beginning of year $ 2,656 $ 2,396 $ 742 $ 664 Employer contributions 13 12 3 2 Participant contributions — — 8 9 Actual return on plan assets 373 456 40 122 Settlement — (22) — — Benefits paid (218) (186) (49) (55) Plan assets at fair value, end of year $ 2,824 $ 2,656 $ 744 $ 742 The following table is a reconciliation of the fair value of plan assets for the years ended December 31 (in millions): 2020 2019 Plan assets at fair value, beginning of year $ 2,151 $ 1,989 Employer contributions 56 56 Participant contributions 1 1 Actual return on plan assets 181 194 Settlement (63) (99) Benefits paid (67) (71) Foreign currency exchange rate changes 75 81 Plan assets at fair value, end of year $ 2,334 $ 2,151
Changes in Projected Benefit Obligations [Table Text Block]	The following table is a reconciliation of the benefit obligations for the years ended December 31 (in millions): Pension Other Postretirement 2020 2019 2020 2019 Benefit obligation, beginning of year $ 2,878 $ 2,718 $ 673 $ 672 Service cost 17 16 7 8 Interest cost 93 111 21 27 Participant contributions — — 8 9 Actuarial loss 226 242 61 12 Amendment — (1) — — Settlement — (22) — — Acquisition 81 — 37 — Benefits paid (218) (186) (49) (55) Benefit obligation, end of year $ 3,077 $ 2,878 $ 758 $ 673 Accumulated benefit obligation, end of year $ 2,999 $ 2,867 The following table is a reconciliation of the benefit obligation for the years ended December 31 (in millions): 2020 2019 Benefit obligation, beginning of year $ 2,019 $ 1,833 Service cost 16 16 Interest cost 40 49 Participant contributions 1 1 Actuarial loss 188 175 Settlement (63) (99) Benefits paid (67) (71) Foreign currency exchange rate changes 71 115 Benefit obligation, end of year $ 2,205 $ 2,019 Accumulated benefit obligation, end of year $ 1,963 $ 1,786
Benefit Obligations in Excess of Fair Value of Plan Assets [Table Text Block]	The funded status of the plans and the amounts recognized on the Consolidated Balance Sheets as of December 31 are as follows (in millions): Pension Other Postretirement 2020 2019 2020 2019 Plan assets at fair value, end of year $ 2,824 $ 2,656 $ 744 $ 742 Benefit obligation, end of year 3,077 2,878 758 673 Funded status $ (253) $ (222) $ (14) $ 69 Amounts recognized on the Consolidated Balance Sheets: Other assets $ 43 $ 73 $ 20 $ 76 Other current liabilities (13) (13) — — Other long-term liabilities (283) (282) (34) (7) Amounts recognized $ (253) $ (222) $ (14) $ 69 The fair value of plan assets, projected benefit obligation and accumulated benefit obligation for (1) pension and other postretirement benefit plans with a projected benefit obligation in excess of the fair value of plan assets and (2) pension plans with an accumulated benefit obligation in excess of the fair value of plan assets as of December 31 are as follows (in millions): Pension Other Postretirement 2020 2019 2020 2019 Fair value of plan assets $ 1,782 $ 1,939 $ 417 $ 439 Projected benefit obligation $ 2,069 $ 2,227 $ 451 $ 446 Fair value of plan assets $ 1,064 $ 1,939 Accumulated benefit obligation $ 1,341 $ 2,222 The funded status of the UK Plan and the amounts recognized on the Consolidated Balance Sheets as of December 31 are as follows (in millions): 2020 2019 Plan assets at fair value, end of year $ 2,334 $ 2,151 Benefit obligation, end of year 2,205 2,019 Funded status $ 129 $ 132 Amounts recognized on the Consolidated Balance Sheets: Other assets $ 129 $ 132
Net Periodic Benefit Costs Not Yet Recognized [Table Text Block]	The portion of the funded status of the plans not yet recognized in net periodic benefit cost as of December 31 is as follows (in millions): Pension Other Postretirement 2020 2019 2020 2019 Net loss (gain) $ 612 $ 653 $ 34 $ (23) Prior service credit (1) (2) (9) (14) Regulatory deferrals 2 1 3 6 Total $ 613 $ 652 $ 28 $ (31) A reconciliation of the amounts not yet recognized as components of net periodic benefit cost for the years ended December 31, 2020 and 2019 is as follows (in millions): Accumulated Other Regulatory Regulatory Comprehensive Asset Liability Loss Total Pension Balance, December 31, 2018 $ 730 $ — $ 16 $ 746 Net (gain) loss arising during the year (38) (33) 10 (61) Net prior service credit arising during the year — — (2) (2) Net amortization (31) — — (31) Total (69) (33) 8 (94) Balance, December 31, 2019 661 (33) 24 652 Net (gain) loss arising during the year (30) 13 10 (7) Net amortization (31) — (1) (32) Total (61) 13 9 (39) Balance, December 31, 2020 $ 600 $ (20) $ 33 $ 613 Accumulated Other Regulatory Regulatory Comprehensive Asset Liability Loss Total Other Postretirement Balance, December 31, 2018 $ 44 $ (10) $ 1 $ 35 Net gain arising during the year (45) (23) (4) (72) Net amortization 5 1 — 6 Total (40) (22) (4) (66) Balance, December 31, 2019 4 (32) (3) (31) Net loss arising during the year 36 12 7 55 Net amortization 7 (3) — 4 Total 43 9 7 59 Balance, December 31, 2020 $ 47 $ (23) $ 4 $ 28 The portion of the funded status of the UK Plan not yet recognized in net periodic benefit cost as of December 31 is as follows (in millions): 2020 2019 Net loss $ 612 $ 543 Prior service cost 6 6 Total $ 618 $ 549 A reconciliation of the amounts not yet recognized as components of net periodic benefit cost, which are included in accumulated other comprehensive loss on the Consolidated Balance Sheets, for the years ended December 31 is as follows (in millions): 2020 2019 Balance, beginning of year $ 549 $ 480 Net loss arising during the year 108 81 Settlement (17) (26) Net amortization (43) (46) Foreign currency exchange rate changes 21 60 Total 69 69 Balance, end of year $ 618 $ 549
Plan Assumptions [Table Text Block]	Weighted-average assumptions used to determine benefit obligations and net periodic benefit cost were as follows: Pension Other Postretirement 2020 2019 2018 2020 2019 2018 Benefit obligations as of December 31: Discount rate 2.60 % 3.32 % 4.25 % 2.59 % 3.24 % 4.21 % Rate of compensation increase 2.75 % 2.75 % 2.75 % NA NA NA Interest crediting rates for cash balance plan 2018 NA NA 3.38 % NA NA NA 2019 NA 3.22 % 3.54 % NA NA NA 2020 2.44 % 2.94 % 3.54 % NA NA NA 2021 2.25 % 2.94 % 3.56 % NA NA NA 2022 2.25 % 3.02 % 3.56 % NA NA NA 2023 2.65 % 3.02 % 3.56 % NA NA NA Net periodic benefit cost for the years ended December 31: Discount rate 3.32 % 4.25 % 3.60 % 3.24 % 4.21 % 3.57 % Expected return on plan assets 5.94 % 6.48 % 6.36 % 5.42 % 6.39 % 6.44 % Rate of compensation increase 2.75 % 2.75 % 2.75 % NA NA NA Interest crediting rate for cash balance plan 2.44 % 3.22 % 3.38 % NA NA NA In establishing its assumption as to the expected return on plan assets, the Company utilizes the asset allocation and return assumptions for each asset class based on historical performance and forward-looking views of the financial markets. 2020 2019 Assumed healthcare cost trend rates as of December 31: Healthcare cost trend rate assumed for next year 6.30 % 6.50 % Rate that the cost trend rate gradually declines to 5.00 % 5.00 % Year that the rate reaches the rate it is assumed to remain at 2025 2025 Assumptions used to determine benefit obligations and net periodic benefit cost were as follows: 2020 2019 2018 Benefit obligations as of December 31: Discount rate 1.40 % 2.10 % 2.90 % Rate of compensation increase 3.05 % 3.30 % 3.55 % Rate of future price inflation 2.55 % 2.80 % 3.05 % Net periodic benefit cost for the years ended December 31: Discount rate 2.10 % 2.90 % 2.60 % Expected return on plan assets 5.00 % 5.10 % 4.90 % Rate of compensation increase 3.30 % 3.55 % 3.45 % Rate of future price inflation 2.80 % 3.05 % 2.95 %
Expected Benefit Payments [Table Text Block]	The expected benefit payments to participants in the Company's pension and other postretirement benefit plans for 2021 through 2025 and for the five years thereafter are summarized below (in millions): Projected Benefit Payments Other Pension Postretirement 2021 $ 236 $ 53 2022 219 54 2023 220 54 2024 211 54 2025 206 52 2026-2030 926 238 Employer contributions to the UK Plan are expected to be £50 million during 2021. The expected benefit payments to participants in the UK Plan for 2021 through 2025 and for the five years thereafter, excluding lump sum settlement elections and using the foreign currency exchange rate as of December 31, 2020, are summarized below (in millions): 2021 $ 74 2022 75 2023 77 2024 79 2025 81 2026-2030 431
Allocation of Plan Assets [Table Text Block]	The target allocations (percentage of plan assets) for the Company's pension and other postretirement benefit plan assets are as follows as of December 31, 2020: Other Pension Postretirement % % PacifiCorp: Debt securities (1) 25-35 75-83 Equity securities (1) 53-68 16-24 Limited partnership interests 7-12 1-3 MidAmerican Energy: Debt securities (1) 50-80 60-70 Equity securities (1) 20-50 30-40 Real estate funds 0-5 — Other 0-5 0-5 NV Energy: Debt securities (1) 60-75 60-70 Equity securities (1) 25-40 30-40 (1) For purposes of target allocation percentages and consistent with the plans' investment policy, investment funds are allocated based on the underlying investments in debt and equity securities. The target allocations (percentage of plan assets) for the UK Plan assets are as follows as of December 31, 2020: % Debt securities (1) 60-70 Equity securities (1) 10-20 Real estate funds and other 15-25 (1) For purposes of target allocation percentages and consistent with the plans' investment policy, investment funds have been allocated based on the underlying investments in debt and equity securities.
Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]	The following table presents the fair value of plan assets, by major category, for the Company's defined benefit pension plans (in millions): Input Levels for Fair Value Measurements (1) Level 1 Level 2 Total As of December 31, 2020: Cash equivalents $ — $ 79 $ 79 Debt securities: United States government obligations 52 — 52 Corporate obligations — 748 748 Municipal obligations — 69 69 Equity securities: United States companies 224 — 224 Total assets in the fair value hierarchy $ 276 $ 896 1,172 Investment funds (2) measured at net asset value 1,521 Limited partnership interests (3) measured at net asset value 88 Real estate funds measured at net asset value 43 Total assets measured at fair value $ 2,824 As of December 31, 2019: Cash equivalents $ 27 $ 36 $ 63 Debt securities: United States government obligations 210 — 210 International government obligations — 5 5 Corporate obligations — 376 376 Municipal obligations — 28 28 Agency, asset and mortgage-backed obligations — 115 115 Equity securities: United States companies 547 1 548 International companies 136 — 136 Investment funds (2) 125 — 125 Total assets in the fair value hierarchy $ 1,045 $ 561 1,606 Investment funds (2) measured at net asset value 915 Limited partnership interests (3) measured at net asset value 93 Real estate funds measured at net asset value 42 Total assets measured at fair value $ 2,656 (1) Refer to Note 15 for additional discussion regarding the three levels of the fair value hierarchy. (2) Investment funds are comprised of mutual funds and collective trust funds. These funds consist of equity and debt securities of approximately 69% and 31%, respectively, for 2020 and 62% and 38%, respectively, for 2019. Additionally, these funds are invested in United States and international securities of approximately 79% and 21%, respectively, for 2020 and 66% and 34%, respectively, for 2019. (3) Limited partnership interests include several funds that invest primarily in real estate, buyout, growth equity and venture capital. The following table presents the fair value of plan assets, by major category, for the Company's defined benefit other postretirement plans (in millions): Input Levels for Fair Value Measurements (1) Level 1 Level 2 Total As of December 31, 2020: Cash equivalents $ 20 $ 2 $ 22 Debt securities: United States government obligations 15 — 15 Corporate obligations — 102 102 Municipal obligations — 82 82 Agency, asset and mortgage-backed obligations — 47 47 Equity securities: United States companies 6 — 6 Investment funds (2) 299 — 299 Total assets in the fair value hierarchy $ 340 $ 233 573 Investment funds (2) measured at net asset value 167 Limited partnership interests (3) measured at net asset value 4 Total assets measured at fair value $ 744 As of December 31, 2019: Cash equivalents $ 17 $ 1 $ 18 Debt securities: United States government obligations 23 — 23 Corporate obligations — 44 44 Municipal obligations — 57 57 Agency, asset and mortgage-backed obligations — 33 33 Equity securities: United States companies 151 — 151 International companies 6 — 6 Investment funds (2) 236 — 236 Total assets in the fair value hierarchy $ 433 $ 135 568 Investment funds (2) measured at net asset value 169 Limited partnership interests (3) measured at net asset value 5 Total assets measured at fair value $ 742 (1) Refer to Note 15 for additional discussion regarding the three levels of the fair value hierarchy. (2) Investment funds are comprised of mutual funds and collective trust funds. These funds consist of equity and debt securities of approximately 40% and 60%, respectively, for 2020 and 58% and 42%, respectively, for 2019. Additionally, these funds are invested in United States and international securities of approximately 79% and 21%, respectively, for 2020 and 75% and 25%, respectively, for 2019. (3) Limited partnership interests include several funds that invest primarily in real estate, buyout, growth equity and venture capital. The following table presents the fair value of the UK Plan assets, by major category (in millions): Input Levels for Fair Value Measurements (1) Level 1 Level 2 Level 3 Total As of December 31, 2020: Cash equivalents $ 5 $ 49 $ — $ 54 Debt securities: United Kingdom government obligations 1,102 — — 1,102 Equity securities: Investment funds (2) — 833 — 833 Real estate funds — — 237 237 Total $ 1,107 $ 882 $ 237 2,226 Investment funds (2) measured at net asset value 108 Total assets measured at fair value $ 2,334 As of December 31, 2019: Cash equivalents $ 3 $ 24 $ — $ 27 Debt securities: United Kingdom government obligations 960 — — 960 Equity securities: Investment funds (2) — 818 — 818 Real estate funds — — 243 243 Total $ 963 $ 842 $ 243 2,048 Investment funds (2) measured at net asset value 103 Total assets measured at fair value $ 2,151 (1) Refer to Note 15 for additional discussion regarding the three levels of the fair value hierarchy. (2) Investment funds are comprised of mutual funds and collective trust funds. These funds consist of equity and debt securities of approximately 40% and 60%, respectively, for 2020 and 38% and 62%, respectively, for 2019. The following table presents the Company's assets and liabilities recognized on the Consolidated Balance Sheets and measured at fair value on a recurring basis (in millions): Input Levels for Fair Value Measurements Level 1 Level 2 Level 3 Other (1) Total As of December 31, 2020: Assets: Commodity derivatives $ 1 $ 73 $ 135 $ (21) $ 188 Foreign currency exchange rate derivatives — 20 — — 20 Interest rate derivatives — — 62 — 62 Mortgage loans held for sale — 2,001 — — 2,001 Money market mutual funds (2) 873 — — — 873 Debt securities: United States government obligations 200 — — — 200 International government obligations — 5 — — 5 Corporate obligations — 73 — — 73 Municipal obligations — 2 — — 2 Agency, asset and mortgage-backed obligations — 6 — — 6 Equity securities: United States companies 381 — — — 381 International companies 5,906 — — — 5,906 Investment funds 201 — — — 201 $ 7,562 $ 2,180 $ 197 $ (21) $ 9,918 Liabilities: Commodity derivatives $ (1) $ (90) $ (19) $ 56 $ (54) Foreign currency exchange rate derivatives — (2) — — (2) Interest rate derivatives (5) (60) — — (65) $ (6) $ (152) $ (19) $ 56 $ (121) As of December 31, 2019: Assets: Commodity derivatives $ — $ 45 $ 108 $ (24) $ 129 Interest rate derivatives — 2 14 — 16 Mortgage loans held for sale — 1,039 — — 1,039 Money market mutual funds (2) 824 — — — 824 Debt securities: United States government obligations 189 — — — 189 International government obligations — 4 — — 4 Corporate obligations — 58 — — 58 Municipal obligations — 1 — — 1 Agency, asset and mortgage-backed obligations — 1 — — 1 Equity securities: United States companies 336 — — — 336 International companies 1,131 — — — 1,131 Investment funds 169 — — — 169 $ 2,649 $ 1,150 $ 122 $ (24) $ 3,897 Liabilities: Commodity derivatives $ (4) $ (143) $ (11) $ 103 $ (55) Interest rate derivatives (2) (19) — — (21) $ (6) $ (162) $ (11) $ 103 $ (76) (1) Represents netting under master netting arrangements and a net cash collateral receivable of $35 million and $79 million as of December 31, 2020 and 2019, respectively. (2) Amounts are included in cash and cash equivalents; other current assets; and noncurrent investments and restricted cash and investments on the Consolidated Balance Sheets. The fair value of these money market mutual funds approximates cost.
Level Three Defined Benefit Plan Assets Roll Forward [Table Text Block]	The following table reconciles the beginning and ending balances of the UK Plan assets measured at fair value using significant Level 3 inputs for the years ended December 31 (in millions): Real Estate Funds 2020 2019 2018 Beginning balance $ 243 $ 239 $ 230 Actual return on plan assets still held at period end (13) (5) 23 Foreign currency exchange rate changes 7 9 (14) Ending balance $ 237 $ 243 $ 239
PacifiCorp [Member]
Defined Benefit Plan Disclosure [Line Items]
Schedule of Net Benefit Costs [Table Text Block]	Net periodic benefit cost for the plans included the following components for the years ended December 31 (in millions): Pension Other Postretirement 2020 2019 2018 2020 2019 2018 Service cost $ — $ — $ — $ 2 $ 2 $ 2 Interest cost 36 44 43 9 12 11 Expected return on plan assets (56) (67) (72) (14) (21) (21) Settlement — — 22 — — — Net amortization 18 11 13 3 — (6) Net periodic benefit (credit) cost $ (2) $ (12) $ 6 $ — $ (7) $ (14)
Changes in Fair Value of Plan Assets [Table Text Block]	The following table is a reconciliation of the fair value of plan assets for the years ended December 31 (in millions): Pension Other Postretirement 2020 2019 2020 2019 Plan assets at fair value, beginning of year $ 1,036 $ 942 $ 334 $ 297 Employer contributions (1) 5 4 — 1 Participant contributions — — 4 5 Actual return on plan assets 124 181 15 55 Benefits paid (101) (91) (26) (24) Plan assets at fair value, end of year $ 1,064 $ 1,036 $ 327 $ 334
Changes in Projected Benefit Obligations [Table Text Block]	The following table is a reconciliation of the benefit obligations for the years ended December 31 (in millions): Pension Other Postretirement 2020 2019 2020 2019 Benefit obligation, beginning of year $ 1,167 $ 1,105 $ 304 $ 298 Service cost — — 2 2 Interest cost 36 44 9 12 Participant contributions — — 4 5 Actuarial loss 100 109 14 11 Benefits paid (101) (91) (26) (24) Benefit obligation, end of year $ 1,202 $ 1,167 $ 307 $ 304 Accumulated benefit obligation, end of year $ 1,202 $ 1,167
Benefit Obligations in Excess of Fair Value of Plan Assets [Table Text Block]	The funded status of the plans and the amounts recognized on the Consolidated Balance Sheets as of December 31 are as follows (in millions): Pension Other Postretirement 2020 2019 2020 2019 Plan assets at fair value, end of year $ 1,064 $ 1,036 $ 327 $ 334 Less - Benefit obligation, end of year 1,202 1,167 307 304 Funded status $ (138) $ (131) $ 20 $ 30 Amounts recognized on the Consolidated Balance Sheets: Other assets $ 8 $ 7 $ 20 $ 30 Accrued employee expenses (4) (4) — — Other long-term liabilities (142) (134) — — Amounts recognized $ (138) $ (131) $ 20 $ 30
Net Periodic Benefit Costs Not Yet Recognized [Table Text Block]	The portion of the funded status of the plans not yet recognized in net periodic benefit cost as of December 31 is as follows (in millions): Pension Other Postretirement 2020 2019 2020 2019 Net loss (gain) $ 455 $ 442 $ (13) $ (26) Regulatory deferrals 2 1 3 6 Total $ 457 $ 443 $ (10) $ (20) A reconciliation of the amounts not yet recognized as components of net periodic benefit cost for the years ended December 31, 2020 and 2019 is as follows (in millions): Accumulated Other Regulatory Comprehensive Asset Loss Total Pension Balance, December 31, 2018 $ 443 $ 17 $ 460 Net (gain) loss arising during the year (11) 5 (6) Net amortization (10) (1) (11) Total (21) 4 (17) Balance, December 31, 2019 422 21 443 Net loss arising during the year 27 5 32 Net amortization (17) (1) (18) Total 10 4 14 Balance, December 31, 2020 $ 432 $ 25 $ 457 Regulatory Asset (Liability) Other Postretirement Balance, December 31, 2018 $ 5 Net gain arising during the year (25) Net amortization — Total (25) Balance, December 31, 2019 (20) Net loss arising during the year 13 Net amortization (3) Total 10 Balance, December 31, 2020 $ (10)
Expected Benefit Payments [Table Text Block]	The expected benefit payments to participants in PacifiCorp's pension and other postretirement benefit plans for 2021 through 2025 and for the five years thereafter are summarized below (in millions): Projected Benefit Payments Pension Other Postretirement 2021 $ 115 $ 24 2022 99 23 2023 94 22 2024 87 22 2025 82 20 2026-2030 341 90
Allocation of Plan Assets [Table Text Block]	The target allocations (percentage of plan assets) for PacifiCorp's pension and other postretirement benefit plan assets are as follows as of December 31, 2020: Pension (1) Other Postretirement (1) % % Debt securities (2) 25 - 35 75 - 83 Equity securities (2) 53 - 68 16 - 24 Limited partnership interests 7 - 12 1 - 3 (1) The trust in which the PacifiCorp Retirement Plan is invested includes a separate account that is used to fund benefits for the other postretirement benefit plan. In addition to this separate account, the assets for the other postretirement benefit plan are held in Voluntary Employees' Beneficiary Association ("VEBA") trusts, each of which has its own investment allocation strategies. Target allocations for the other postretirement benefit plan include the separate account of the Retirement Plan trust and the VEBA trusts. (2) For purposes of target allocation percentages and consistent with the plans' investment policy, investment funds are allocated based on the underlying investments in debt and equity securities.
Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]	The following table presents the fair value of plan assets, by major category, for PacifiCorp's defined benefit pension plan (in millions): Input Levels for Fair Value Measurements Level 1 (1) Level 2 (1) Level 3 (1) Total As of December 31, 2020: Cash equivalents $ — $ 32 $ — $ 32 Debt securities: United States government obligations 14 — — 14 Corporate obligations — 231 — 231 Municipal obligations — 21 — 21 Equity securities: United States companies 91 — — 91 Total assets in the fair value hierarchy $ 105 $ 284 $ — 389 Investment funds (2) measured at net asset value 587 Limited partnership interests (3) measured at net asset value 88 Investments at fair value $ 1,064 As of December 31, 2019: Cash equivalents $ — $ 24 $ — $ 24 Debt securities: United States government obligations 21 — — 21 Corporate obligations — 94 — 94 Municipal obligations — 10 — 10 Agency, asset and mortgage-backed obligations — 42 — 42 Equity securities: United States companies 355 — — 355 International companies 15 — — 15 Investment funds (2) 55 — — 55 Total assets in the fair value hierarchy $ 446 $ 170 $ — 616 Investment funds (2) measured at net asset value 327 Limited partnership interests (3) measured at net asset value 93 Investments at fair value $ 1,036 (1) Refer to Note 13 for additional discussion regarding the three levels of the fair value hierarchy. (2) Investment funds are substantially comprised of mutual funds and collective trust funds. These funds consist of equity and debt securities of approximately 78% and 22%, respectively, for 2020 and 55% and 45%, respectively, for 2019, and are invested in United States and international securities of approximately 74% and 26%, respectively, for 2020 and 51% and 49%, respectively, for 2019. (3) Limited partnership interests include several funds that invest primarily in real estate. The following table presents the fair value of plan assets, by major category, for PacifiCorp's defined benefit other postretirement plan (in millions): Input Levels for Fair Value Measurements Level 1 (1) Level 2 (1) Level 3 (1) Total As of December 31, 2020: Cash and cash equivalents $ 8 $ 1 $ — $ 9 Debt securities: United States government obligations 11 — — 11 Corporate obligations — 86 — 86 Municipal obligations — 16 — 16 Agency, asset and mortgage-backed obligations — 44 — 44 Equity securities: United States companies 4 — — 4 Total assets in the fair value hierarchy 23 147 — 170 Investment funds (2) measured at net asset value 153 Limited partnership interests (3) measured at net asset value 4 Investments at fair value $ 327 As of December 31, 2019: Cash and cash equivalents $ 8 $ 1 $ — $ 9 Debt securities: United States government obligations 12 — — 12 Corporate obligations — 26 — 26 Municipal obligations — 2 — 2 Agency, asset and mortgage-backed obligations — 22 — 22 Equity securities: United States companies 74 — — 74 International companies 4 — — 4 Investment funds (2) 44 — — 44 Total assets in the fair value hierarchy 142 51 — 193 Investment funds (2) measured at net asset value 136 Limited partnership interests (3) measured at net asset value 5 Investments at fair value $ 334 (1) Refer to Note 13 for additional discussion regarding the three levels of the fair value hierarchy. (2) Investment funds are substantially comprised of mutual funds and collective trust funds. These funds consist of equity and debt securities of approximately 38% and 62%, respectively, for 2020 and 56% and 44%, respectively, for 2019, and are invested in United States and international securities of approximately 93% and 7%, respectively, for 2020 and 79% and 21%, respectively, for 2019. (3) Limited partnership interests include several funds that invest primarily in real estate, buyout, growth equity and venture capital. The following table presents PacifiCorp's assets and liabilities recognized on the Consolidated Balance Sheets and measured at fair value on a recurring basis (in millions): Input Levels for Fair Value Measurements Level 1 Level 2 Level 3 Other (1) Total As of December 31, 2020: Assets: Commodity derivatives $ — $ 36 $ — $ (3) $ 33 Money market mutual funds (2) 6 — — — 6 Investment funds 25 — — — 25 $ 31 $ 36 $ — $ (3) $ 64 Liabilities - Commodity derivatives $ — $ (53) $ — $ 27 $ (26) As of December 31, 2019: Assets: Commodity derivatives $ — $ 21 $ — $ (7) $ 14 Money market mutual funds (2) 23 — — — 23 Investment funds 25 — — — 25 $ 48 $ 21 $ — $ (7) $ 62 Liabilities - Commodity derivatives $ — $ (84) $ — $ 54 $ (30) (1) Represents netting under master netting arrangements and a net cash collateral receivable of $24 million and $47 million as of December 31, 2020 and 2019, respectively. (2) Amounts are included in cash and cash equivalents, other current assets and other assets on the Consolidated Balance Sheets. The fair value of these money market mutual funds approximates cost.
Schedule of Multiemployer Plans [Table Text Block]	The following table presents PacifiCorp's participation in individually significant joint trustee and multiemployer pension plans for the years ended December 31 (dollars in millions): PPA zone status or plan funded status percentage for plan years beginning July 1, Contributions (1) Plan name Employer Identification Number 2020 2019 2018 Funding improvement plan Surcharge imposed under PPA (1) 2020 2019 2018 Year contributions to plan exceeded more than 5% of total contributions (2) Local 57 Trust Fund 87-0640888 At least 80% At least 80% At least 80% None None $ 6 $ 7 $ 7 2018, 2017, 2016 (1) PacifiCorp's minimum contributions to the plan are based on the amount of wages paid to employees covered by the Local 57 Trust Fund collective bargaining agreements, subject to ERISA minimum funding requirements. (2) For the Local 57 Trust Fund, information is for plan years beginning July 1, 2018, 2017 and 2016. Information for the plan year beginning July 1, 2019 is not yet available.
MidAmerican Energy Company [Member]
Defined Benefit Plan Disclosure [Line Items]
Schedule of Net Benefit Costs [Table Text Block]	Net periodic benefit cost for the plans of MidAmerican Energy and the aforementioned affiliates included the following components for the years ended December 31 (in millions): Pension Other Postretirement 2020 2019 2018 2020 2019 2018 Service cost $ 8 $ 6 $ 9 $ 4 $ 5 $ 5 Interest cost 25 30 28 7 10 8 Expected return on plan assets (40) (41) (44) (14) (13) (13) Settlement — — (1) — — — Net amortization 1 1 2 (5) (3) (4) Net periodic benefit (credit) cost $ (6) $ (4) $ (6) $ (8) $ (1) $ (4)
Changes in Fair Value of Plan Assets [Table Text Block]	The following table is a reconciliation of the fair value of plan assets for the years ended December 31 (in millions): Pension Other Postretirement 2020 2019 2020 2019 Plan assets at fair value, beginning of year $ 717 $ 644 $ 272 $ 247 Employer contributions 6 7 3 1 Participant contributions — — 1 2 Actual return on plan assets 55 123 15 42 Benefits paid (60) (57) (13) (20) Plan assets at fair value, end of year $ 718 $ 717 $ 278 $ 272
Changes in Projected Benefit Obligations [Table Text Block]	The following table is a reconciliation of the benefit obligations for the years ended December 31 (in millions): Pension Other Postretirement 2020 2019 2020 2019 Benefit obligation, beginning of year $ 763 $ 736 $ 226 $ 242 Service cost 8 6 4 5 Interest cost 25 30 7 10 Participant contributions — — 1 2 Actuarial (gain) loss 28 48 42 (13) Acquisition 81 — 37 — Benefits paid (60) (57) (13) (20) Benefit obligation, end of year $ 845 $ 763 $ 304 $ 226 Accumulated benefit obligation, end of year $ 773 $ 758
Benefit Obligations in Excess of Fair Value of Plan Assets [Table Text Block]	The funded status of the plans and the amounts recognized on the Balance Sheets as of December 31 are as follows (in millions): Pension Other Postretirement 2020 2019 2020 2019 Plan assets at fair value, end of year $ 718 $ 717 $ 278 $ 272 Less - Benefit obligation, end of year 845 763 304 226 Funded status $ (127) $ (46) $ (26) $ 46 Amounts recognized on the Balance Sheets: Other assets $ — $ 66 $ — $ 46 Other current liabilities (7) (7) — — Other liabilities (120) (105) (26) — Amounts recognized $ (127) $ (46) $ (26) $ 46
Net Periodic Benefit Costs Not Yet Recognized [Table Text Block]	The portion of the funded status of the plans not yet recognized in net periodic benefit cost as of December 31 is as follows (in millions): Pension Other Postretirement 2020 2019 2020 2019 Net loss (gain) $ 18 $ 6 $ 45 $ 4 Prior service cost (credit) — (1) (9) (14) Total $ 18 $ 5 $ 36 $ (10) A reconciliation of the amounts not yet recognized as components of net periodic benefit cost for the years ended December 31, 2020 and 2019 is as follows (in millions): Regulatory Asset Regulatory Liability Receivables (Payables) with Affiliates Total Pension Balance, December 31, 2018 $ 25 $ — $ 16 $ 41 Net (gain) loss arising during the year (5) (32) 2 (35) Net amortization (1) — — (1) Total (6) (32) 2 (36) Balance, December 31, 2019 19 (32) 18 5 Net loss (gain) arising during the year 3 12 (1) 14 Net amortization (1) — — (1) Total 2 12 (1) 13 Balance, December 31, 2020 $ 21 $ (20) $ 17 $ 18 Regulatory Receivables (Payables) with Affiliates Total Other Postretirement Balance, December 31, 2018 $ 37 $ (9) $ 28 Net gain arising during the year (33) (9) (42) Net amortization 3 1 4 Total (30) (8) (38) Balance, December 31, 2019 7 (17) (10) Net loss arising during the year 34 7 41 Net amortization 4 1 5 Total 38 8 46 Balance, December 31, 2020 $ 45 $ (9) $ 36
Plan Assumptions [Table Text Block]	Assumptions used to determine benefit obligations and net periodic benefit cost were as follows: Pension Other Postretirement 2020 2019 2018 2020 2019 2018 Benefit obligations as of December 31: Discount rate 2.75 % 3.40 % 4.25 % 2.65 % 3.20 % 4.15 % Rate of compensation increase 2.75 % 2.75 % 2.75 % N/A N/A N/A Interest crediting rates for cash balance plan 2018 N/A N/A 2.26 % N/A N/A N/A 2019 N/A 3.40 % 3.40 % N/A N/A N/A 2020 2.27 % 2.27 % 3.40 % N/A N/A N/A 2021 0.99 % 2.27 % 3.40 % N/A N/A N/A 2022 0.99 % 2.27 % 3.40 % N/A N/A N/A 2023 and beyond 0.99 % 2.27 % 3.40 % N/A N/A N/A Net periodic benefit cost for the years ended December 31: Discount rate 3.40 % 4.25 % 3.60 % 3.20 % 4.15 % 3.50 % Expected return on plan assets (1) 6.25 % 6.50 % 6.50 % 6.00 % 6.25 % 6.25 % Rate of compensation increase 2.75 % 2.75 % 2.75 % N/A N/A N/A Interest crediting rates for cash balance plan 2.27 % 3.40 % 2.26 % N/A N/A N/A (1) Amounts reflected are pretax values. Assumed after-tax returns for a taxable, non-union other postretirement plan were 4.62% for 2020, 4.62% for 2019, and 4.13% for 2018. In establishing its assumption as to the expected return on plan assets, MidAmerican Energy utilizes the asset allocation and return assumptions for each asset class based on historical performance and forward-looking views of the financial markets. 2020 2019 Assumed healthcare cost trend rates as of December 31: Healthcare cost trend rate assumed for next year 6.20 % 6.50 % Rate that the cost trend rate gradually declines to 5.00 % 5.00 % Year that the rate reaches the rate it is assumed to remain at 2025 2025
Expected Benefit Payments [Table Text Block]	Net periodic benefit costs assigned to MidAmerican Energy affiliates are reimbursed currently in accordance with its intercompany administrative services agreement. The expected benefit payments to participants in MidAmerican Energy's pension and other postretirement benefit plans for 2021 through 2025 and for the five years thereafter are summarized below (in millions): Projected Benefit Payments Pension Other Postretirement 2021 $ 64 $ 20 2022 62 21 2023 60 22 2024 58 23 2025 56 22 2026-2030 248 104
Allocation of Plan Assets [Table Text Block]	The target allocations (percentage of plan assets) for MidAmerican Energy's pension and other postretirement benefit plan assets are as follows as of December 31, 2020: Pension Other Postretirement % % Debt securities (1) 50-80 60-70 Equity securities (1) 20-50 30-40 Real estate funds 0-5 — Other 0-5 0-5 (1) For purposes of target allocation percentages and consistent with the plans' investment policy, investment funds are allocated based on the underlying investments in debt and equity securities.
Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]	The following table presents the fair value of plan assets, by major category, for MidAmerican Energy's defined benefit pension plan (in millions): Input Levels for Fair Value Measurements (1) Level 1 Level 2 Level 3 Total As of December 31, 2020: Cash equivalents $ — $ 26 $ — $ 26 Debt securities: United States government obligations 14 — — 14 Corporate obligations — 160 — 160 Municipal obligations — 17 — 17 Equity securities: United States companies 65 — — 65 Total assets in the hierarchy $ 79 $ 203 $ — 282 Investment funds (2) measured at net asset value 393 Real estate funds measured at net asset value 43 Total assets measured at fair value $ 718 As of December 31, 2019: Cash equivalents $ 21 $ — $ — $ 21 Debt securities: United States government obligations 16 — — 16 Corporate obligations — 61 — 61 Municipal obligations — 5 — 5 Agency, asset and mortgage-backed obligations — 33 — 33 Equity securities: United States companies 129 — — 129 International companies 42 — — 42 Investment funds (2) 69 — — 69 Total assets in the hierarchy $ 277 $ 99 $ — 376 Investment funds (2) measured at net asset value 299 Real estate funds measured at net asset value 42 Total assets measured at fair value $ 717 (1) Refer to Note 12 for additional discussion regarding the three levels of the fair value hierarchy. (2) Investment funds are comprised of mutual funds and collective trust funds. These funds consist of equity and debt securities of approximately 65% and 35%, respectively, for 2020 and 69% and 31%, respectively, for 2019. Additionally, these funds are invested in United States and international securities of approximately 82% and 18%, respectively, for 2020 and 74% and 26%, respectively, for 2019. The following table presents the fair value of plan assets, by major category, for MidAmerican Energy's defined benefit other postretirement plans (in millions): Input Levels for Fair Value Measurements (1) Level 1 Level 2 Level 3 Total As of December 31, 2020: Cash equivalents $ 11 $ — $ — $ 11 Debt securities: United States government obligations 3 — — 3 Corporate obligations — 7 — 7 Municipal obligations — 65 — 65 Agency, asset and mortgage-backed obligations — 3 — 3 Equity securities: Investment funds (2) 189 — — 189 Total assets measured at fair value $ 203 $ 75 $ — $ 278 As of December 31, 2019: Cash equivalents $ 6 $ — $ — $ 6 Debt securities: United States government obligations 6 — — 6 Corporate obligations — 12 — 12 Municipal obligations — 55 — 55 Agency, asset and mortgage-backed obligations — 10 — 10 Equity securities: United States companies 75 — — 75 Investment funds (2) 108 — — 108 Total assets measured at fair value $ 195 $ 77 $ — $ 272 (1) Refer to Note 12 for additional discussion regarding the three levels of the fair value hierarchy. (2) Investment funds are comprised of mutual funds and collective trust funds. These funds consist of equity and debt securities of approximately 56% and 44%, respectively, for 2020 and 77% and 23%, respectively, for 2019. Additionally, these funds are invested in United States and international securities of approximately 56% and 44%, respectively, for 2020 and 42% and 58%, respectively, for 2019. The following table presents MidAmerican Energy's assets and liabilities recognized on the Balance Sheets and measured at fair value on a recurring basis (in millions): Input Levels for Fair Value Measurements Level 1 Level 2 Level 3 Other (1) Total As of December 31, 2020: Assets: Commodity derivatives $ — $ 4 $ 5 $ (5) $ 4 Money market mutual funds (2) 41 — — — 41 Debt securities: United States government obligations 200 — — — 200 International government obligations — 5 — — 5 Corporate obligations — 73 — — 73 Municipal obligations — 2 — — 2 Agency, asset and mortgage-backed obligations — 6 — — 6 Equity securities: United States companies 381 — — — 381 International companies 9 — — — 9 Investment funds 17 — — — 17 $ 648 $ 90 $ 5 $ (5) $ 738 Liabilities - commodity derivatives $ — $ (4) $ (3) $ 5 $ (2) As of December 31, 2019 Assets: Commodity derivatives $ — $ 2 $ 1 $ (1) $ 2 Money market mutual funds (2) 274 — — — 274 Debt securities: United States government obligations 189 — — — 189 International government obligations — 4 — — 4 Corporate obligations — 58 — — 58 Municipal obligations — 1 — — 1 Agency, asset and mortgage-backed obligations — 1 — — 1 Equity securities: United States companies 336 — — — 336 International companies 9 — — — 9 Investment funds 15 — — — 15 $ 823 $ 66 $ 1 $ (1) $ 889 Liabilities - commodity derivatives $ — $ (9) $ — $ 2 $ (7) (1) Represents netting under master netting arrangements and a net cash collateral receivable of $— million and $1 million as of December 31, 2020 and 2019, respectively. (2) Amounts are included in cash and cash equivalents and investments and restricted investments on the Balance Sheets. The fair value of these money market mutual funds approximates cost.
MidAmerican Funding, LLC and Subsidiaries [Member]
Defined Benefit Plan Disclosure [Line Items]
Schedule of Net Benefit Costs [Table Text Block]	Pension and postretirement costs allocated by MidAmerican Funding to its parent and other affiliates in each of the years ended December 31, were as follows (in millions): 2020 2019 2018 Pension costs $ 7 $ 4 $ 3 Other postretirement costs (3) (2) (2)
Eastern Energy Gas Holdings, LLC [Member]
Defined Benefit Plan Disclosure [Line Items]
Schedule of Net Benefit Costs [Table Text Block]	Net periodic benefit cost for the plans included the following components for the years ended December 31 (in millions): Pension Other Postretirement 2020 2019 2018 2020 2019 2018 Service cost $ 5 $ 6 $ 18 $ 1 $ 1 $ 4 Interest cost 8 11 29 4 5 11 Expected return on plan assets (47) (54) (150) (16) (16) (28) Settlement — 1 — — 1 — Net amortization 5 7 19 (3) (2) (1) Net periodic benefit cost (credit) $ (29) $ (29) $ (84) $ (14) $ (11) $ (14)
Changes in Fair Value of Plan Assets [Table Text Block]	The following table is a reconciliation of the fair value of plan assets for the year ended December 31 (in millions): Pension Other Postretirement 2019 2019 Plan assets at fair value, beginning of year $ 1,656 $ 311 Dominion Energy Gas Restructuring (1,084) (126) Employer contributions — 12 Actual return on plan assets 129 38 Benefits paid (15) (8) Plan assets at fair value, end of year $ 686 $ 227
Changes in Projected Benefit Obligations [Table Text Block]	The following table is a reconciliation of the benefit obligations for the year ended December 31 (in millions): Pension Other Postretirement 2019 2019 Benefit obligation, beginning of year $ 730 $ 256 Dominion Energy Gas Restructuring (468) (135) Service cost 6 1 Interest cost 11 5 Actuarial loss 30 1 Settlement 1 1 Benefits paid (15) (8) Benefit obligation, end of year $ 295 $ 121
Schedule of Net Funded Status [Table Text Block]	The funded status of the plans and the amounts recognized on the Consolidated Balance Sheets as of December 31 are as follows (in millions): Pension Other Postretirement 2019 2019 Plan assets at fair value, end of year $ 686 $ 227 Less - Benefit obligation, end of year 295 121 Funded status $ 391 $ 106 Amounts recognized on the Consolidated Balance Sheets: Other assets $ 391 $ 106 Amounts recognized $ 391 $ 106 Significant assumptions used to determine benefit obligations: Discount rate 3.63 % 3.44 % Weighted average rate of increase for compensation 4.64 % n/a
Net Periodic Benefit Costs Not Yet Recognized [Table Text Block]	The portion of the funded status of the plans not yet recognized in net periodic benefit cost as of December 31 is as follows (in millions): Pension Other Postretirement 2019 2019 Net loss $ 150 $ 44 Prior service cost (credit) — (49) Total (1) $ 150 $ (5) (1) As of December 31, 2019, of the $150 million related to pension benefits, $147 million is included in AOCI, with the remainder included in regulatory assets and liabilities and the $(5) million related to other postretirement benefits is included entirely in regulatory assets and liabilities.
Plan Assumptions [Table Text Block]	Significant assumptions used to determine periodic credits for the years ended December 31: Pension Other Postretirement 2020 2019 2018 2020 2019 2018 Discount rate 3.16% - 3.63% 4.10% - 4.42% 3.81 % 3.44 % 4.05% - 4.37% 3.81 % Expected long-term rate of return on plan assets 8.60 % 8.65 % 8.75 % 8.50 % 8.50 % 8.50 % Weighted average rate of increase for compensation 4.73 % 4.55 % 4.11 % n/a n/a n/a Healthcare cost trend rate 6.50 % 6.50 % 7.00 % Rate to which the cost trend rate is assumed to decline (the ultimate trend rate) 5.00 % 5.00 % 5.00 % Year that the rate reached the ultimate trend rate 2026 2025 2022
Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]	The following table presents the fair value of plan assets, by major category, for Eastern Energy Gas' defined benefit pension plan as of December 31, 2019 (in millions): Input Levels for Fair Value Measurements Level 1 (1) Level 2 (1) Level 3 (1) Total Cash and cash equivalents $ 1 $ — $ — $ 1 Debt securities: United States government obligations 2 59 — 61 Corporate obligations 3 66 — 69 Insurance contracts — 28 — 28 Equity securities: United States equity securities 177 — — 177 International equity securities 114 — — 114 Total assets in the fair value hierarchy $ 297 $ 153 $ — 450 Investment funds measured at net asset value 238 Investments at fair value $ 688 (1) Refer to Note 15 for additional discussion regarding the three levels of the fair value hierarchy. The following table presents the fair value of plan assets, by major category, for Eastern Energy Gas' defined benefit other postretirement plan as of December 31, 2019 (in millions): Input Levels for Fair Value Measurements Level 1 (1) Level 2 (1) Level 3 (1) Total Equity securities: United States equity securities $ 86 $ — $ — $ 86 International equity securities 21 — — 21 Total assets in the fair value hierarchy $ 107 $ — $ — 107 Investment funds measured at net asset value 120 Investments at fair value $ 227 (1) Refer to Note 15 for additional discussion regarding the three levels of the fair value hierarchy.

Retirement Plan and Postretir_2

Retirement Plan and Postretirement Benefits (Tables)	12 Months Ended
	Dec. 31, 2020
Nevada Power Company [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Schedule of Amounts Recognized in Balance Sheet [Table Text Block]	Amounts receivable from (payable to) NV Energy are included on the Consolidated Balance Sheets and consist of the following as of December 31 (in millions): 2020 2019 Qualified Pension Plan: Other non-current assets $ 8 $ — Other long-term liabilities — (18) Non-Qualified Pension Plans: Other current liabilities (1) (1) Other long-term liabilities (9) (9) Other Postretirement Plans: Other non-current assets 4 — Other long-term liabilities — (2)
Sierra Pacific Power Company [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Schedule of Amounts Recognized in Balance Sheet [Table Text Block]	Amounts receivable from (payable to) NV Energy are included on the Balance Sheets and consist of the following as of December 31 (in millions): 2020 2019 Qualified Pension Plan: Other non-current assets $ 26 $ — Other long-term liabilities — (4) Non-Qualified Pension Plans: Other current liabilities (1) (1) Other long-term liabilities (8) (8) Other Postretirement Plans - Other long-term liabilities (13) (7)

Asset Retirement Obligations (T

Asset Retirement Obligations (Tables)	12 Months Ended
	Dec. 31, 2020
Asset Retirement Obligations Disclosure [Line Items]
Asset Retirement Obligations By Type [Table Text Block]	The following table presents the Company's ARO liabilities by asset type as of December 31 (in millions): 2020 2019 Fossil fuel facilities $ 529 $ 623 Quad Cities Station 376 358 Wind generating facilities 273 211 Offshore pipeline facilities 16 15 Solar generating facilities 24 21 Other 123 44 Total asset retirement obligations $ 1,341 $ 1,272 Quad Cities Station nuclear decommissioning trust funds $ 676 $ 599
Asset Retirement Obligation Disclosure [Table Text Block]	The following table reconciles the beginning and ending balances of the Company's ARO liabilities for the years ended December 31 (in millions): 2020 2019 Beginning balance $ 1,272 $ 985 Change in estimated costs 46 257 Acquisitions 122 — Additions 51 43 Retirements (201) (61) Accretion 51 48 Ending balance $ 1,341 $ 1,272 Reflected as: Other current liabilities $ 184 $ 167 Other long-term liabilities 1,157 1,105 Total ARO liability $ 1,341 $ 1,272
PacifiCorp [Member]
Asset Retirement Obligations Disclosure [Line Items]
Asset Retirement Obligation Disclosure [Table Text Block]	The following table reconciles the beginning and ending balances of PacifiCorp's ARO liabilities for the years ended December 31 (in millions): 2020 2019 Beginning balance $ 257 $ 227 Change in estimated costs (11) 27 Additions 25 9 Retirements (10) (15) Accretion 9 9 Ending balance $ 270 $ 257 Reflected as: Other current liabilities $ 13 $ 19 Other long-term liabilities 257 238 $ 270 $ 257
MidAmerican Energy Company [Member]
Asset Retirement Obligations Disclosure [Line Items]
Asset Retirement Obligations By Type [Table Text Block]	The following table presents MidAmerican Energy's ARO liabilities by asset type as of December 31 (in millions): 2020 2019 Quad Cities Station $ 376 $ 358 Fossil-fueled generating facilities 255 325 Wind-powered generating facilities 185 154 Other 2 2 Total asset retirement obligations $ 818 $ 839 Quad Cities Station nuclear decommissioning trust funds (1) $ 676 $ 599 (1) Refer to Note 6 for a discussion of the Quad Cities Station nuclear decommissioning trust funds.
Asset Retirement Obligation Disclosure [Table Text Block]	The following table reconciles the beginning and ending balances of MidAmerican Energy's ARO liabilities for the years ended December 31 (in millions): 2020 2019 Beginning balance $ 839 $ 562 Change in estimated costs 47 234 Additions 23 27 Retirements (124) (14) Accretion 33 30 Ending balance $ 818 $ 839 Reflected as: Other current liabilities $ 109 $ 135 Asset retirement obligations 709 704 $ 818 $ 839
Nevada Power Company [Member]
Asset Retirement Obligations Disclosure [Line Items]
Asset Retirement Obligations By Type [Table Text Block]	The following table presents Nevada Power's ARO liabilities by asset type as of December 31 (in millions): 2020 2019 Waste water remediation $ 36 $ 37 Evaporative ponds and dry ash landfills 13 12 Solar 3 2 Other 20 23 Total asset retirement obligations $ 72 $ 74
Asset Retirement Obligation Disclosure [Table Text Block]	The following table reconciles the beginning and ending balances of Nevada Power's ARO liabilities for the years ended December 31 (in millions): 2020 2019 Beginning balance $ 74 $ 83 Change in estimated costs 9 6 Retirements (14) (19) Accretion 3 4 Ending balance $ 72 $ 74 Reflected as: Other current liabilities $ 25 $ 14 Other long-term liabilities 47 60 $ 72 $ 74
Sierra Pacific Power Company [Member]
Asset Retirement Obligations Disclosure [Line Items]
Asset Retirement Obligations By Type [Table Text Block]	The following table presents Sierra Pacific's ARO liabilities by asset type as of December 31 (in millions): 2020 2019 Asbestos $ 5 $ 5 Evaporative ponds and dry ash landfills 3 2 Other 3 3 Total asset retirement obligations $ 11 $ 10
Asset Retirement Obligation Disclosure [Table Text Block]	The following table reconciles the beginning and ending balances of Sierra Pacific's ARO liabilities for the years ended December 31 (in millions): 2020 2019 Beginning balance $ 10 $ 10 Accretion 1 — Ending balance $ 11 $ 10 Reflected as - Other long-term liabilities $ 11 $ 10
Eastern Energy Gas Holdings, LLC [Member]
Asset Retirement Obligations Disclosure [Line Items]
Asset Retirement Obligation Disclosure [Table Text Block]	The following table reconciles the beginning and ending balances of Eastern Energy Gas' ARO liabilities for the years ended December 31 (in millions): 2020 2019 Beginning balance $ 89 $ 88 Change in estimated costs (51) — Additions 48 — Retirements (3) (3) Disposal of Questar Pipeline Group (16) — Accretion 4 4 Ending balance $ 71 $ 89 Reflected as: Other current liabilities $ 36 $ 14 Other long-term liabilities 35 75 Total ARO liability $ 71 $ 89

Commitments and Contingencies_2

Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2020
Contractual Obligation [Line Items]
Contractual Obligation, Fiscal Year Maturity Schedule	The Company has the following firm commitments that are not reflected on the Consolidated Balance Sheet. Minimum payments as of December 31, 2020 are as follows (in millions): 2026 and 2021 2022 2023 2024 2025 Thereafter Total Contract type: Fuel, capacity and transmission contract commitments $ 2,122 $ 1,559 $ 1,307 $ 1,285 $ 1,047 $ 12,985 $ 20,305 Construction commitments 783 372 148 — — 4 1,307 Easements 72 74 74 73 73 2,229 2,595 Maintenance, service and other contracts 413 366 313 257 210 1,435 2,994 $ 3,390 $ 2,371 $ 1,842 $ 1,615 $ 1,330 $ 16,653 $ 27,201
PacifiCorp [Member]
Contractual Obligation [Line Items]
Contractual Obligation, Fiscal Year Maturity Schedule	PacifiCorp has the following firm commitments that are not reflected on the Consolidated Balance Sheet. Minimum payments as of December 31, 2020 are as follows (in millions): 2021 2022 2023 2024 2025 2026 and Thereafter Total Contract type: Purchased electricity contracts - commercially operable $ 223 $ 201 $ 195 $ 192 $ 172 $ 2,028 $ 3,011 Purchased electricity contracts - non-commercially operable 25 25 25 26 28 456 585 Fuel contracts 636 426 368 320 137 611 2,498 Construction commitments 90 — — — — — 90 Transmission 104 97 90 74 49 409 823 Easements 14 14 13 13 13 278 345 Maintenance, service and other contracts 100 69 40 35 36 214 494 Total commitments $ 1,192 $ 832 $ 731 $ 660 $ 435 $ 3,996 $ 7,846
MidAmerican Energy Company [Member]
Contractual Obligation [Line Items]
Contractual Obligation, Fiscal Year Maturity Schedule	MidAmerican Energy had the following firm commitments that are not reflected on the Balance Sheet. Minimum payments as of December 31, 2020, are as follows (in millions): 2026 and 2021 2022 2023 2024 2025 Thereafter Total Contract type: Coal and natural gas for generation $ 86 $ 55 $ 43 $ — $ — $ — $ 184 Electric capacity and transmission 29 18 9 9 9 25 99 Natural gas contracts for gas operations 121 79 51 21 13 23 308 Construction commitments 442 287 2 — — 4 735 Easements 38 39 40 41 41 1,542 1,741 Maintenance, services and other 156 159 159 123 92 358 1,047 $ 872 $ 637 $ 304 $ 194 $ 155 $ 1,952 $ 4,114
Nevada Power Company [Member]
Contractual Obligation [Line Items]
Contractual Obligation, Fiscal Year Maturity Schedule	Nevada Power has the following firm commitments that are not reflected on the Consolidated Balance Sheet. Minimum payments as of December 31, 2020 are as follows (in millions): 2021 2022 2023 2024 2025 2026 and Thereafter Total Contract type: Fuel, capacity and transmission contract commitments $ 570 $ 409 $ 328 $ 328 $ 331 $ 3,197 $ 5,163 Fuel and capacity contract commitments (not commercially operable) — 35 74 197 229 4,965 5,500 Construction commitments 72 85 146 — — — 303 Easements 4 5 5 2 2 43 61 Maintenance, service and other contracts 48 44 32 23 12 6 165 Total commitments $ 694 $ 578 $ 585 $ 550 $ 574 $ 8,211 $ 11,192
Sierra Pacific Power Company [Member]
Contractual Obligation [Line Items]
Contractual Obligation, Fiscal Year Maturity Schedule	Sierra Pacific has the following firm commitments that are not reflected on the Balance Sheet. Minimum payments as of December 31, 2020 are as follows (in millions): 2026 and 2021 2022 2023 2024 2025 Thereafter Total Contract type: Fuel, capacity and transmission contract commitments $ 327 $ 186 $ 98 $ 95 $ 96 $ 940 $ 1,742 Fuel and capacity contract commitments (not commercially operable) 6 35 36 36 36 637 786 Easements 2 2 2 2 2 30 40 Maintenance, service and other contracts 9 7 2 1 1 — 20 Total commitments $ 344 $ 230 $ 138 $ 134 $ 135 $ 1,607 $ 2,588

Components of Accumulated Oth_2

Components of Accumulated Other Comprehensive Loss, Net (Tables)	12 Months Ended
	Dec. 31, 2020
Schedule of accumulated other comprehensive income (loss)
Schedule of Accumulated Other Comprehensive Income (Loss)	The following table shows the change in accumulated other comprehensive loss attributable to BHE shareholders by each component of other comprehensive income (loss), net of applicable income taxes, for the year ended December 31 (in millions): Unrecognized Foreign Unrealized Unrealized AOCI Amounts on Currency Gains on Gains (Losses) Attributable Retirement Translation Marketable on Cash Flow To BHE Benefits Adjustment Securities Hedges Shareholders, Net Balance, December 31, 2017 $ (383) $ (1,129) $ 1,085 $ 29 $ (398) Adoption of ASU 2016-01 — — (1,085) — (1,085) Other comprehensive income (loss) 25 (494) — 7 (462) Balance, December 31, 2018 (358) (1,623) — 36 (1,945) Other comprehensive (loss) income (59) 327 — (29) 239 Balance, December 31, 2019 (417) (1,296) — 7 (1,706) Other comprehensive (loss) income (65) 233 — (15) 153 Balance, December 31, 2020 $ (482) $ (1,063) $ — $ (8) $ (1,553)
Eastern Energy Gas Holdings, LLC [Member]
Schedule of accumulated other comprehensive income (loss)
Schedule of Accumulated Other Comprehensive Income (Loss)	The following table shows the change in accumulated other comprehensive loss by each component of other comprehensive income (loss), net of applicable income taxes, for the year ended December 31 (in millions): Unrecognized Unrealized Accumulated Amounts On Losses On Other Retirement Cash Flow Noncontrolling Comprehensive Benefits Hedges Interests Loss Balance, December 31, 2017 $ (75) $ (23) $ — $ (98) Other comprehensive (loss) income (69) (2) — (71) Balance, December 31, 2018 (144) (25) — (169) Other comprehensive income (loss) 38 (56) — (18) Balance, December 31, 2019 (106) (81) — (187) Other comprehensive income 94 30 10 134 Balance, December 31, 2020 $ (12) $ (51) $ 10 $ (53)
Reclassification out of Accumulated Other Comprehensive Income	The following table shows the reclassifications from AOCI to net income for the year ended December 31 (in millions): Affected Line Item In The Amounts Consolidated Reclassified Statements of From AOCI Operations 2020 Deferred (gains) and losses on derivatives-hedging activities: Interest rate contracts $ 157 Interest expense Foreign currency contracts (25) Other, net Total 132 Tax (34) Income tax (benefit) expense Total, net of tax $ 98 Unrecognized pension costs: Actuarial losses $ 6 Other, net Total 6 Tax (2) Income tax (benefit) expense Total, net of tax $ 4 2019 Deferred (gains) and losses on derivatives-hedging activities: Commodity contracts $ (4) Net income from discontinued operations Interest rate contracts 5 Interest expense Foreign currency contracts 6 Other, net Total 7 Tax (2) Income tax (benefit) expense Total, net of tax $ 5 Unrecognized pension costs: Actuarial losses $ 7 Other, net Total 7 Tax (2) Income tax (benefit) expense Total, net of tax $ 5 2018 Deferred (gains) and losses on derivatives-hedging activities: Commodity contracts $ 8 Net income from discontinued operations Interest rate contracts 5 Interest expense Foreign currency contracts 13 Other, net Total 26 Tax (7) Income tax (benefit) expense Total, net of tax $ 19 Unrecognized pension costs: Actuarial losses $ 6 Other, net Total 6 Tax (2) Income tax (benefit) expense Total, net of tax $ 4

Noncontrolling Interests (Table

Noncontrolling Interests (Tables)	12 Months Ended
	Dec. 31, 2020
MidAmerican Funding, LLC and Subsidiaries [Member]
Noncontrolling Interest [Line Items]
Schedule of Other Nonoperating Income (Expense) [Table Text Block]	Other, net, as shown on the Consolidated Statements of Operations, includes the following other income (expense) items for the years ended December 31 (in millions): 2020 2019 2018 Non-service cost components of postretirement employee benefit plans $ 24 $ 17 $ 21 Corporate-owned life insurance income 16 24 6 Gains on disposition of assets 6 — — Interest income and other, net 6 11 4 Total $ 52 $ 52 $ 31

Segment Information (Tables)

Segment Information (Tables)	12 Months Ended
	Dec. 31, 2020
Segment Reporting Information [Line Items]
Schedule of Segment Reporting Information, by Segment [Table Text Block]	Information related to the Company's reportable segments is shown below (in millions): Years Ended December 31, 2020 2019 2018 Operating revenue: PacifiCorp $ 5,341 $ 5,068 $ 5,026 MidAmerican Funding 2,728 2,927 3,053 NV Energy 2,854 3,037 3,039 Northern Powergrid 1,022 1,013 1,020 BHE Pipeline Group 1,578 1,131 1,203 BHE Transmission 659 707 710 BHE Renewables 936 932 908 HomeServices 5,396 4,473 4,214 BHE and Other (1) 438 556 614 Total operating revenue $ 20,952 $ 19,844 $ 19,787 Depreciation and amortization: PacifiCorp $ 1,209 $ 954 $ 979 MidAmerican Funding 716 638 609 NV Energy 502 482 456 Northern Powergrid 266 254 250 BHE Pipeline Group 231 115 126 BHE Transmission 201 240 247 BHE Renewables 284 282 268 HomeServices 45 47 51 BHE and Other (1) 1 (1) (2) Total depreciation and amortization $ 3,455 $ 3,011 $ 2,984 Operating income: PacifiCorp $ 924 $ 1,072 $ 1,051 MidAmerican Funding 454 549 550 NV Energy 649 655 607 Northern Powergrid 421 472 486 BHE Pipeline Group 779 572 525 BHE Transmission 316 323 313 BHE Renewables 291 336 325 HomeServices 511 222 214 BHE and Other (1) (54) (51) 1 Total operating income 4,291 4,150 4,072 Interest expense (2,021) (1,912) (1,838) Capitalized interest 80 77 61 Allowance for equity funds 165 173 104 Interest and dividend income 71 117 113 Gains (losses) on marketable securities, net 4,797 (288) (538) Other, net 88 97 (9) Total income before income tax expense (benefit) and equity (loss) income $ 7,471 $ 2,414 $ 1,965 Years Ended December 31, 2020 2019 2018 Interest expense: PacifiCorp $ 426 $ 401 $ 384 MidAmerican Funding 322 302 247 NV Energy 227 229 224 Northern Powergrid 130 139 141 BHE Pipeline Group 74 52 43 BHE Transmission 148 157 167 BHE Renewables 166 174 201 HomeServices 11 25 23 BHE and Other (1) 517 433 408 Total interest expense $ 2,021 $ 1,912 $ 1,838 Income tax expense (benefit): PacifiCorp $ (75) $ 61 $ 5 MidAmerican Funding (574) (377) (262) NV Energy 61 98 100 Northern Powergrid 96 59 61 BHE Pipeline Group 162 138 119 BHE Transmission 13 11 7 BHE Renewables (2) (602) (325) (158) HomeServices 138 51 52 BHE and Other (1) 1,089 (314) (507) Total income tax expense (benefit) $ 308 $ (598) $ (583) Net income attributable to BHE shareholders: PacifiCorp $ 741 $ 773 $ 739 MidAmerican Funding 818 781 669 NV Energy 410 365 317 Northern Powergrid 201 256 239 BHE Pipeline Group 528 422 387 BHE Transmission 231 229 210 BHE Renewables (2) 521 431 329 HomeServices 375 160 145 BHE and Other 3,118 (467) (467) Total net income attributable to BHE shareholders $ 6,943 $ 2,950 $ 2,568 Capital expenditures: PacifiCorp $ 2,540 $ 2,175 $ 1,257 MidAmerican Funding 1,836 2,810 2,332 NV Energy 675 657 503 Northern Powergrid 682 602 566 BHE Pipeline Group 659 687 427 BHE Transmission 372 247 270 BHE Renewables 95 122 817 HomeServices 36 54 47 BHE and Other (130) 10 22 Total capital expenditures $ 6,765 $ 7,364 $ 6,241 As of December 31, 2020 2019 2018 Property, plant and equipment, net: PacifiCorp $ 22,430 $ 20,973 $ 19,570 MidAmerican Funding 19,279 18,377 16,169 NV Energy 9,865 9,613 9,367 Northern Powergrid 7,230 6,606 6,007 BHE Pipeline Group 15,097 5,482 4,904 BHE Transmission 6,445 6,157 5,824 BHE Renewables 5,645 5,976 6,155 HomeServices 159 161 141 BHE and Other (22) (40) (50) Total property, plant and equipment, net $ 86,128 $ 73,305 $ 68,087 Total assets: PacifiCorp $ 26,862 $ 24,861 $ 23,478 MidAmerican Funding 23,530 22,664 20,029 NV Energy 14,501 14,128 14,119 Northern Powergrid 8,782 8,385 7,427 BHE Pipeline Group 19,541 6,100 5,511 BHE Transmission 9,208 8,776 8,424 BHE Renewables 12,004 9,961 8,666 HomeServices 4,955 3,846 2,797 BHE and Other 7,933 1,330 1,738 Total assets $ 127,316 $ 100,051 $ 92,189 Years Ended December 31, 2020 2019 2018 Operating revenue by country: United States $ 19,254 $ 18,108 $ 18,014 United Kingdom 1,022 1,011 1,017 Canada 653 706 710 Philippines and other 23 19 46 Total operating revenue by country $ 20,952 $ 19,844 $ 19,787 Income before income tax expense (benefit) and equity (loss) income by country: United States $ 6,954 $ 1,866 $ 1,425 United Kingdom 338 326 307 Canada 173 178 155 Philippines and other 6 44 78 Total income before income tax expense (benefit) and equity (loss) income by country: $ 7,471 $ 2,414 $ 1,965 As of December 31, 2020 2019 2018 Property, plant and equipment, net by country: United States $ 72,583 $ 60,634 $ 56,362 United Kingdom 7,134 6,504 5,895 Canada 6,401 6,157 5,817 Philippines and other 10 10 13 Total property, plant and equipment, net by country $ 86,128 $ 73,305 $ 68,087 (1) The differences between the reportable segment amounts and the consolidated amounts, described as BHE and Other, relate to other corporate entities, including MidAmerican Energy Services, LLC, corporate functions and intersegment eliminations. (2) Income tax expense (benefit) includes the tax attributes of disregarded entities that are not required to pay income taxes and the earnings of which are taxable directly to BHE.
Schedule of Goodwill [Table Text Block]	The following table shows the change in the carrying amount of goodwill by reportable segment for the years ended December 31, 2020 and 2019 (in millions): BHE BHE MidAmerican NV Northern Pipeline BHE BHE Home- and PacifiCorp Funding Energy Powergrid Group Transmission Renewables Services Other Total December 31, 2018 $ 1,129 $ 2,102 $ 2,369 $ 952 $ 73 $ 1,448 $ 95 $ 1,427 $ — $ 9,595 Acquisitions — — — — — — — 29 — 29 Foreign currency translation — — — 26 — 72 — — — 98 December 31, 2019 1,129 2,102 2,369 978 73 1,520 95 1,456 — 9,722 Acquisitions — — — — 1,730 — — 1 — 1,731 Foreign currency translation — — — 22 — 31 — — — 53 December 31, 2020 $ 1,129 $ 2,102 $ 2,369 $ 1,000 $ 1,803 $ 1,551 $ 95 $ 1,457 $ — $ 11,506
MidAmerican Energy Company [Member]
Segment Reporting Information [Line Items]
Schedule of Segment Reporting Information, by Segment [Table Text Block]	The following tables provide information on a reportable segment basis (in millions): Years Ended December 31, 2020 2019 2018 Operating revenue: Regulated electric $ 2,139 $ 2,237 $ 2,283 Regulated natural gas 573 660 754 Other 8 28 12 Total operating revenue $ 2,720 $ 2,925 $ 3,049 Depreciation and amortization: Regulated electric $ 667 $ 593 $ 565 Regulated natural gas 49 46 44 Total depreciation and amortization $ 716 $ 639 $ 609 Operating income: Regulated electric $ 384 $ 473 $ 469 Regulated natural gas 64 71 81 Other — 4 1 Total operating income $ 448 $ 548 $ 551 Interest expense: Regulated electric $ 281 $ 259 $ 208 Regulated natural gas 23 22 19 Total interest expense $ 304 $ 281 $ 227 Years Ended December 31, 2020 2019 2018 Income tax (benefit) expense: Regulated electric $ (584) $ (384) $ (273) Regulated natural gas 14 12 16 Other — 1 2 Total income tax (benefit) expense $ (570) $ (371) $ (255) Net income: Regulated electric $ 780 $ 739 $ 628 Regulated natural gas 45 52 54 Other 1 2 — Net income $ 826 $ 793 $ 682 Capital expenditures: Regulated electric $ 1,704 $ 2,684 $ 2,223 Regulated natural gas 132 126 109 Total capital expenditures $ 1,836 $ 2,810 $ 2,332 As of December 31, 2020 2019 2018 Total assets: Regulated electric $ 19,892 $ 19,093 $ 16,511 Regulated natural gas 1,544 1,468 1,406 Other 1 3 3 Total assets $ 21,437 $ 20,564 $ 17,920
MidAmerican Funding, LLC and Subsidiaries [Member]
Segment Reporting Information [Line Items]
Schedule of Segment Reporting Information, by Segment [Table Text Block]	The following tables provide information on a reportable segment basis (in millions): Years Ended December 31, 2020 2019 2018 Operating revenue: Regulated electric $ 2,139 $ 2,237 $ 2,283 Regulated natural gas 573 660 754 Other 16 30 16 Total operating revenue $ 2,728 $ 2,927 $ 3,053 Depreciation and amortization: Regulated electric $ 667 $ 593 $ 565 Regulated natural gas 49 46 44 Total depreciation and amortization $ 716 $ 639 $ 609 Operating income: Regulated electric $ 384 $ 473 $ 469 Regulated natural gas 64 71 81 Other 6 5 — Total operating income $ 454 $ 549 $ 550 Interest expense: Regulated electric $ 281 $ 259 $ 208 Regulated natural gas 23 22 19 Other 18 21 20 Total interest expense $ 322 $ 302 $ 247 Income tax (benefit) expense: Regulated electric $ (584) $ (384) $ (273) Regulated natural gas 14 12 16 Other (4) (5) (5) Total income tax (benefit) expense $ (574) $ (377) $ (262) Net income: Regulated electric $ 780 $ 739 $ 628 Regulated natural gas 45 52 54 Other (7) (10) (13) Net income $ 818 $ 781 $ 669 Years Ended December 31, 2020 2019 2018 Capital expenditures: Regulated electric $ 1,704 $ 2,684 $ 2,223 Regulated natural gas 132 126 109 Total capital expenditures $ 1,836 $ 2,810 $ 2,332 As of December 31, 2020 2019 2018 Total assets: Regulated electric $ 21,083 $ 20,284 $ 17,702 Regulated natural gas 1,623 1,547 1,485 Other 5 9 15 Total assets $ 22,711 $ 21,840 $ 19,202
Schedule of Goodwill [Table Text Block]	Goodwill by reportable segment as of December 31, 2020 and 2019, was as follows (in millions): Regulated electric $ 1,191 Regulated natural gas 79 Total $ 1,270
Sierra Pacific Power Company [Member]
Segment Reporting Information [Line Items]
Schedule of Segment Reporting Information, by Segment [Table Text Block]	The following tables provide information on a reportable segment basis (in millions): Years Ended December 31, 2020 2019 2018 Operating revenue: Regulated electric $ 738 $ 770 $ 752 Regulated natural gas 116 119 103 Total operating revenue $ 854 $ 889 $ 855 Operating income: Regulated electric $ 147 $ 150 $ 136 Regulated natural gas 18 21 16 Total operating income 165 171 152 Interest expense (56) (48) (44) Allowance for borrowed funds 2 1 1 Allowance for equity funds 4 3 4 Other, net 11 4 9 Income before income tax expense $ 126 $ 131 $ 122 As of December 31, 2020 2019 2018 Assets Regulated electric $ 3,540 $ 3,319 $ 3,177 Regulated natural gas 342 308 314 Regulated common assets (1) 37 44 78 Total assets $ 3,919 $ 3,671 $ 3,569 (1) Consists principally of cash and cash equivalents not included in either the regulated electric or regulated natural gas segments.

Revenue from Contract with Cu_2

Revenue from Contract with Customer (Tables)	12 Months Ended
	Dec. 31, 2020
Disaggregation of Revenue [Line Items]
Disaggregation of Revenue [Table Text Block]	The following table summarizes the Company's energy products and services revenue by regulated energy and nonregulated energy, with further disaggregation of regulated energy by line of business, including a reconciliation to the Company's reportable segment information included in Note 22 (in millions): For the Year Ended December 31, 2020 PacifiCorp MidAmerican Funding NV Energy Northern Powergrid BHE Pipeline Group BHE Transmission BHE Renewables BHE and Other (1) Total Customer Revenue: Regulated: Retail Electric $ 4,932 $ 1,924 $ 2,566 $ — $ — $ — $ — $ (1) $ 9,421 Retail Gas — 505 114 — — — — — 619 Wholesale 107 199 45 — 17 — — (2) 366 Transmission and 96 60 95 887 — 641 — — 1,779 Interstate pipeline — — — — 1,397 — — (139) 1,258 Other 108 — 2 — — — — — 110 Total Regulated 5,243 2,688 2,822 887 1,414 641 — (142) 13,553 Nonregulated — 16 2 26 134 18 817 515 1,528 Total Customer Revenue 5,243 2,704 2,824 913 1,548 659 817 373 15,081 Other revenue (1) 98 24 30 109 30 — 119 65 475 Total $ 5,341 $ 2,728 $ 2,854 $ 1,022 $ 1,578 $ 659 $ 936 $ 438 $ 15,556 For the Year Ended December 31, 2019 PacifiCorp MidAmerican Funding NV Energy Northern Powergrid BHE Pipeline Group BHE Transmission BHE Renewables BHE and Other (1) Total Customer Revenue: Regulated: Retail Electric $ 4,789 $ 1,938 $ 2,740 $ — $ — $ — $ — $ (2) $ 9,465 Retail Gas — 570 116 — — — — — 686 Wholesale 99 309 51 — — — — (2) 457 Transmission and 98 57 98 876 — 690 — — 1,819 Interstate pipeline — — — — 1,122 — — (118) 1,004 Other — — 2 — — — — — 2 Total Regulated 4,986 2,874 3,007 876 1,122 690 — (122) 13,433 Nonregulated — 30 — 36 — 17 744 577 1,404 Total Customer Revenue 4,986 2,904 3,007 912 1,122 707 744 455 14,837 Other revenue (1) 82 23 30 101 9 — 188 101 534 Total $ 5,068 $ 2,927 $ 3,037 $ 1,013 $ 1,131 $ 707 $ 932 $ 556 $ 15,371 For the Year Ended December 31, 2018 PacifiCorp MidAmerican Funding NV Energy Northern Powergrid BHE Pipeline Group BHE Transmission BHE Renewables BHE and Other (1) Total Customer Revenue: Regulated: Retail Electric $ 4,732 $ 1,915 $ 2,773 $ — $ — $ — $ — $ (1) $ 9,419 Retail Gas — 636 101 — — — — — 737 Wholesale 55 411 39 — — — — (4) 501 Transmission and 103 56 96 892 — 700 — (1) 1,846 Interstate pipeline — — — — 1,232 — — (125) 1,107 Other — — 2 — — — — — 2 Total Regulated 4,890 3,018 3,011 892 1,232 700 — (131) 13,612 Nonregulated — 14 — 39 — 10 673 624 1,360 Total Customer Revenue 4,890 3,032 3,011 931 1,232 710 673 493 14,972 Other revenue (1) 136 21 28 89 (29) — 235 121 601 Total $ 5,026 $ 3,053 $ 3,039 $ 1,020 $ 1,203 $ 710 $ 908 $ 614 $ 15,573 (1) Includes net payments to counterparties for the financial settlement of certain derivative contracts at BHE Pipeline Group.
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table Text Block]	The following table summarizes the Company's revenue it expects to recognize in future periods related to significant unsatisfied remaining performance obligations for fixed contracts with expected durations in excess of one year as of December 31, 2020, by reportable segment (in millions): Performance obligations expected to be satisfied Less than 12 months More than 12 months Total BHE Pipeline Group $ 2,563 $ 22,088 $ 24,651 BHE Transmission 647 — 647 Total $ 3,210 $ 22,088 $ 25,298
HomeServices [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of Revenue [Table Text Block]	The following table summarizes the Company's real estate services revenue by line of business (in millions): HomeServices Years Ended December 31, 2020 2019 2018 Customer Revenue: Brokerage $ 4,520 $ 4,028 $ 3,882 Franchise 76 68 67 Total Customer Revenue 4,596 4,096 3,949 Mortgage and other revenue 800 377 265 Total $ 5,396 $ 4,473 $ 4,214
HomeServices [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of Revenue [Table Text Block]	The following table summarizes PacifiCorp's revenue by regulated energy, with further disaggregation of regulated energy by customer class, for the years ended December 31 (in millions): 2020 2019 2018 Customer Revenue: Retail: Residential $ 1,910 $ 1,783 $ 1,737 Commercial 1,578 1,522 1,513 Industrial 1,185 1,176 1,172 Other retail 259 230 234 Total retail 4,932 4,711 4,656 Wholesale 107 99 55 Transmission 96 98 103 Other Customer Revenue 108 78 76 Total Customer Revenue 5,243 4,986 4,890 Other revenue 98 82 136 Total operating revenue $ 5,341 $ 5,068 $ 5,026
MidAmerican Energy Company and Subsidiaries [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of Revenue [Table Text Block]	The following table summarizes MidAmerican Energy's revenue by line of business and customer class, including a reconciliation to MidAmerican Energy's reportable segment information included in Note 18, (in millions): For the Year Ended December 31, 2020 Electric Natural Gas Other Total Customer Revenue: Retail: Residential $ 685 $ 342 $ — $ 1,027 Commercial 304 111 — 415 Industrial 804 14 — 818 Natural gas transportation services — 36 — 36 Other retail 131 2 — 133 Total retail 1,924 505 — 2,429 Wholesale 133 66 — 199 Multi-value transmission projects 60 — — 60 Other Customer Revenue — — 8 8 Total Customer Revenue 2,117 571 8 2,696 Other revenue 22 2 — 24 Total operating revenue $ 2,139 $ 573 $ 8 $ 2,720 For the Year Ended December 31, 2019 Electric Natural Gas Other Total Customer Revenue: Retail: Residential $ 672 $ 383 $ — $ 1,055 Commercial 322 132 — 454 Industrial 799 17 — 816 Natural gas transportation services — 38 — 38 Other retail 145 — — 145 Total retail 1,938 570 — 2,508 Wholesale 221 88 — 309 Multi-value transmission projects 57 — — 57 Other Customer Revenue — — 28 28 Total Customer Revenue 2,216 658 28 2,902 Other revenue 21 2 — 23 Total operating revenue $ 2,237 $ 660 $ 28 $ 2,925 For the Year Ended December 31, 2018 Electric Natural Gas Other Total Customer Revenue: Retail: Residential $ 696 $ 421 $ — $ 1,117 Commercial 314 153 — 467 Industrial 758 22 — 780 Natural gas transportation services — 39 — 39 Other retail 147 1 — 148 Total retail 1,915 636 — 2,551 Wholesale 295 116 — 411 Multi-value transmission projects 55 — — 55 Other Customer Revenue — — 11 11 Total Customer Revenue 2,265 752 11 3,028 Other revenue 18 2 1 21 Total operating revenue $ 2,283 $ 754 $ 12 $ 3,049
Nevada Power Company [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of Revenue [Table Text Block]	The following table summarizes Nevada Power's revenue from contracts with customers ("Customer Revenue") by customer class for the years ended December 31 (in millions): 2020 2019 2018 Customer Revenue: Retail: Residential $ 1,145 $ 1,141 $ 1,195 Commercial 384 441 433 Industrial 345 433 425 Other 12 20 24 Total fully bundled 1,886 2,035 2,077 Distribution only service 24 31 30 Total retail 1,910 2,066 2,107 Wholesale, transmission and other 62 57 53 Total Customer Revenue 1,972 2,123 2,160 Other revenue 26 25 24 Total revenue $ 1,998 $ 2,148 $ 2,184
Sierra Pacific Power Company [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of Revenue [Table Text Block]	The following table summarizes Sierra Pacific's revenue from contracts with customers ("Customer Revenue") by customer class, including a reconciliation to Sierra Pacific's reportable segment information included in Note 17, for the years ended December 31 (in millions): 2020 2019 2018 Electric Natural Gas Total Electric Natural Gas Total Electric Natural Gas Total Customer Revenue: Retail: Residential $ 273 $ 76 $ 349 $ 268 $ 76 $ 344 $ 267 $ 67 $ 334 Commercial 233 29 262 245 30 275 246 25 271 Industrial 170 9 179 186 10 196 177 8 185 Other 5 — 5 6 1 7 6 1 7 Total fully bundled 681 114 795 705 117 822 696 101 797 Distribution only service 4 — 4 4 — 4 4 — 4 Total retail 685 114 799 709 117 826 700 101 801 Wholesale, transmission and other 50 — 50 57 — 57 48 — 48 Total Customer Revenue 735 114 849 766 117 883 748 101 849 Other revenue 3 2 5 4 2 6 4 2 6 Total revenue $ 738 $ 116 $ 854 $ 770 $ 119 $ 889 $ 752 $ 103 $ 855
Eastern Energy Gas Holdings, LLC [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of Revenue [Table Text Block]	The following table summarizes Eastern Energy Gas' energy products and services revenue by regulated and nonregulated for the years ended December 31 (in millions): 2020 2019 2018 Customer Revenue: Regulated: Gas transportation and storage $ 1,242 $ 1,300 $ 1,249 Wholesale 43 9 25 Other 4 7 19 Total regulated 1,289 1,316 1,293 Nonregulated 798 849 709 Total Customer Revenue 2,087 2,165 2,002 Other revenue 3 4 (6) Total operating revenue $ 2,090 $ 2,169 $ 1,996
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table Text Block]	The following table summarizes Eastern Energy Gas' revenue it expects to recognize in future periods related to significant unsatisfied remaining performance obligations for fixed contracts with expected durations in excess of one year as of December 31, 2020 (in millions): Performance obligations expected to be satisfied Less than 12 months More than 12 months Total Eastern Energy Gas $ 1,575 $ 17,073 $ 18,648

Organization and Operations (De

Organization and Operations (Details)	12 Months Ended
	Dec. 31, 2020OwnedAndOperatedCompaniesOperatingSegmentsnaturalGasProducer
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of Reportable Segments | OperatingSegments	8
Number of owned and operated utility companies in the United States	4
Number of states owned and operated utility companies serve customers	11
Number of owned and operated electricity distribution companies in Great Britain	2
Number of owned and operated interstate natural gas pipeline companies in the United States	5
Number of owned and operated electricity transmission companies in Canada	1
Number of owned and operated real estate franchise networks in the United States	1
Number of owned and operated renewable energy businesses | naturalGasProducer	1
Number of owned and operated residential real estate brokerage firms in the United States | naturalGasProducer	1

Organization and Operations - E

Organization and Operations - EEGH (Details) - Eastern Energy Gas Holdings, LLC [Member]	12 Months Ended
	Dec. 31, 2020mi
Iroquois Gas Transmission System L.P. [Member]
Variable Interest Entity [Line Items]
Variable interest entity, ownership percentage	50.00%
Variable Interest Entity, Primary Beneficiary [Member] | Limited Partner [Member] | Cove Point LNG, LP [Member]
Variable Interest Entity [Line Items]
Variable interest entity, ownership percentage	25.00%
Variable Interest Entity, Primary Beneficiary [Member] | General Partner [Member] | Cove Point LNG, LP [Member]
Variable Interest Entity [Line Items]
Variable interest entity, ownership percentage	100.00%
Variable Interest Entity, Primary Beneficiary [Member] | Federal Energy Regulatory Commission [Member] | Iroquois Gas Transmission System L.P. [Member]
Variable Interest Entity [Line Items]
Miles of interstate natural gas transportation pipeline	416

Summary of Significant Accoun_4

Summary of Significant Accounting Policies - Allowance for Doubtful Accounts (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Allowance for Doubtful Accounts [Line Items]
Allowance for doubtful accounts	$ 77	$ 44

Summary of Significant Accoun_5

Summary of Significant Accounting Policies - Inventory (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Summary of Significant Accounting Policies - Inventory [Abstract]
Energy Related Inventory, Other Fossil Fuel	$ 382	$ 257
Inventory, Raw Materials and Supplies, Gross	786	616
Replacement cost of inventory	$ 10
Replacement cost under stated LIFO value		2
Inventory [Line Items]
Replacement cost under stated LIFO value		$ 2

Summary of Significant Accoun_6

Summary of Significant Accounting Policies - Revenue Recognition (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Significant Accounting Policies - Revenue Recognition [Abstract]
Unbilled revenue	$ 750	$ 638

Summary of SIgnificant Accoun_7

Summary of SIgnificant Accounting Policies - PacifiCorp - Investments (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
PacifiCorp [Member]
Available-for-sale Securities, Accumulated Gross Unrealized Gain (Loss), before Tax	$ 0	$ 0

Summary of Significant Accoun_8

Summary of Significant Accounting Policies - PacifiCorp - Allowance for Doubtful Accounts (Details) - PacifiCorp [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Allowance for Doubtful Accounts [Line Items]
Allowance for doubtful accounts	$ 8	$ 8	$ 10
Accounts Receivable, Credit Loss Expense (Reversal)	18	13	12
Accounts Receivable, Allowance for Credit Loss, Writeoff	(9)	(13)	(14)
Allowance for doubtful accounts	$ 17	$ 8	$ 8

Summary of Significant Accoun_9

Summary of Significant Accounting Policies - PacifiCorp - Revenue Recognition (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
PacifiCorp [Member]
Unbilled Contracts Receivable	$ 254	$ 245

Summary of Significant Accou_10

Summary of Significant Accounting Policies - PacifiCorp - Income Taxes (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2020		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Deferred Tax Assets and Liabilities [Line Items]
Federal statutory income tax rate		21.00%		21.00%	21.00%	35.00%
Regulatory Assets		$ 3,440		$ 2,881
Regulatory Liabilities		7,475		7,311
Deferred Income Tax Charge [Member]
Deferred Tax Assets and Liabilities [Line Items]
Regulatory Assets		283	[1]	223
Deferred Income Tax Charge [Member]
Deferred Tax Assets and Liabilities [Line Items]
Regulatory Liabilities	[2]	$ 3,600		$ 3,611
PacifiCorp [Member]
Deferred Tax Assets and Liabilities [Line Items]
Federal statutory income tax rate		21.00%		21.00%	21.00%	35.00%
Regulatory Assets		$ 1,395		$ 1,123
Regulatory Liabilities		2,842		2,969
Deferred investment tax credit		12		11
PacifiCorp [Member] | Deferred Income Tax Charge [Member]
Deferred Tax Assets and Liabilities [Line Items]
Regulatory Liabilities	[3]	$ 1,463		$ 1,653
Tax Cuts and Jobs Act of 2017 [Member]
Deferred Tax Assets and Liabilities [Line Items]
Federal statutory income tax rate						21.00%
[1]	Amounts primarily represent income tax benefits related to certain property-related basis differences and other various differences that were previously passed on to customers and will be included in regulated rates when the temporary differences reverse.
[2]	Amounts primarily represent income tax liabilities related to the federal tax rate change from 35% to 21% that are probable to be passed on to customers, offset by income tax benefits related to certain property-related basis differences and other various differences that were previously passed on to customers and will be included in regulated rates when the temporary differences reverse.
[3]	Amounts primarily represent income tax liabilities related to the federal tax rate change from 35% to 21% that are probable of being passed on to customers, offset by income tax benefits related to certain property-related basis differences and other various differences that were previously passed on to customers and will be included in regulated rates when the temporary differences reverse.

Summary of Significant Accou_11

Summary of Significant Accounting Policies - MEC - Allowance for Doubtful Accounts (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Accounts Receivable, Allowance for Credit Loss, Current	$ 77	$ 44
MidAmerican Energy Company [Member]
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Accounts Receivable, Allowance for Credit Loss, Current	$ 12	$ 5

Summary of Significant Accou_12

Summary of Significant Accounting Policies - MEC - Inventory (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Inventory [Line Items]
Inventory, Raw Materials and Supplies, Gross	$ 786	$ 616
Replacement cost under stated LIFO value		2
Replacement cost of inventory	10
MidAmerican Energy Company [Member]
Inventory [Line Items]
Inventory, Raw Materials and Supplies, Gross	129	128
Public utility inventory, coal	119	66
Public utility inventory - natural gas in storage	26	28
Replacement cost under stated LIFO value		$ (2)
Replacement cost of inventory	$ 10

Summary of Significant Accou_13

Summary of Significant Accounting Policies - MEC - Revenue Recognition (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Unbilled revenue	$ 750	$ 638
MidAmerican Energy Company [Member]
Unbilled revenue	95	91
Adjustment clause accounts receivable (payable)	$ 22	$ 56

Summary of Significant Accou_14

Summary of Significant Accounting Policies - MEC - New Accounting Pronouncements (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Accounts Receivable, Allowance for Credit Loss, Current	$ 77	$ 44
MidAmerican Energy Company [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Accounts Receivable, Allowance for Credit Loss, Current	12	5
Energy Related Inventory, Gas Stored Underground	26	28
Adjustment clause accounts receivable (payable)	$ 22	$ 56

Summary of Significant Accou_15

Summary of Significant Accounting Policies - NPC - Allowance for Doubtful Accounts (Details) - Nevada Power Company [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for doubtful accounts	$ 15	$ 16	$ 16
Accounts Receivable, Credit Loss Expense (Reversal)	13	12	15
Accounts Receivable, Allowance for Credit Loss, Writeoff	(9)	(13)	(15)
Allowance for doubtful accounts	$ 19	$ 15	$ 16

Summary of Significant Accou_16

Summary of Significant Accounting Policies - NPC - Inventory (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Inventory [Line Items]
Inventory, Raw Materials and Supplies, Gross	$ 786	$ 616
Nevada Power Company [Member]
Inventory [Line Items]
Inventory, Raw Materials and Supplies, Gross	$ 69	$ 62

Summary of Significant Accou_17

Summary of Significant Accounting Policies - NPC - Property, Plant and Equipment, Net (Details)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Nevada Power Company [Member]
Property, Plant and Equipment [Line Items]
Public Utilities, Allowance for Funds Used During Construction, Rate	7.43%	7.83%

Summary of Significant Accou_18

Summary of Significant Accounting Policies - NPC - Revenue Recognition (Details) - Nevada Power Company [Member] - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Unbilled Contracts Receivable	$ 104	$ 109
Contractual Assets	$ 8	$ 9

Summary of Significant Accou_19

Summary of Significant Accounting Policies - NPC - Segment Information (Details)	12 Months Ended
	Dec. 31, 2020TheNumberOfReportableSegmentsOperatingSegments
Segment Reporting Information [Line Items]
Number of Reportable Segments | OperatingSegments	8
Nevada Power Company [Member]
Segment Reporting Information [Line Items]
Number of Reportable Segments | TheNumberOfReportableSegments	1

Summary of Significant Accou_20

Summary of Significant Accounting Policies - SPPC - Allowance for Doubtful Accounts (Details) - Sierra Pacific Power Company [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Allowance for Doubtful Accounts [Line Items]
Allowance for doubtful accounts	$ 2	$ 2	$ 2	$ 2
Accounts Receivable, Credit Loss Expense (Reversal)	2	1	1
Accounts Receivable, Allowance for Credit Loss, Writeoff	(2)	(1)	(1)
Allowance for doubtful accounts	$ 2	$ 2	$ 2

Summary of Significant Accou_21

Summary of Significant Accounting Policies - SPPC - Inventory (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Inventory [Line Items]
Inventory, Raw Materials and Supplies, Gross	$ 786	$ 616
Energy Related Inventory, Other Fossil Fuel	382	257
Sierra Pacific Power Company [Member]
Inventory [Line Items]
Inventory, Raw Materials and Supplies, Gross	67	49
Energy Related Inventory, Other Fossil Fuel	$ 10	$ 8

Summary of Significant Accou_22

Summary of Significant Accounting Policies - SPPC - Property, Plant and Equipment, Net (Details) - Sierra Pacific Power Company [Member]	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Electricity Generation Plant, Non-Nuclear [Member]
Property, Plant and Equipment [Line Items]
Public Utilities, Allowance for Funds Used During Construction, Rate	6.75%	6.65%
Natural Gas Processing Plant [Member]
Property, Plant and Equipment [Line Items]
Public Utilities, Allowance for Funds Used During Construction, Rate	5.75%	5.75%
Common Facilities [Member]
Property, Plant and Equipment [Line Items]
Public Utilities, Allowance for Funds Used During Construction, Rate	6.65%	6.55%

Summary of Significant Accou_23

Summary of Significant Accounting Policies - SPPC - Revenue Recognition (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Unbilled revenue	$ 750	$ 638
Sierra Pacific Power Company [Member]
Unbilled revenue	$ 59	$ 63

Summary of Significant Accou_24

Summary of Significant Accounting Policies - EEGH - Allowance for Doubtful Accounts (Details) - Eastern Energy Gas Holdings, LLC [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Allowance for Doubtful Accounts [Line Items]
Allowance for doubtful accounts	$ 5	$ 2	$ 0	$ 0
Accounts Receivable, Credit Loss Expense (Reversal)	4	2	0
Accounts Receivable, Allowance for Credit Loss, Writeoff	(1)	0	0
Allowance for doubtful accounts	$ 5	$ 2	$ 0

Summary of Significant Accou_25

Summary of Significant Accounting Policies - EEGH - Revenue Recognition (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Disaggregation of Revenue [Line Items]
Unbilled revenue	$ 750	$ 638
Eastern Energy Gas Holdings, LLC [Member]
Disaggregation of Revenue [Line Items]
Unbilled revenue	95	104
Contract assets	29	40
Contract liabilities	$ 19	$ 20

Summary of Significant Accou_26

Summary of Significant Accounting Policies - EEGH - New Accounting Pronouncements (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Total equity	$ 46,977	$ 32,578	$ 29,723	$ 28,308
Eastern Energy Gas Holdings, LLC [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Total equity	$ 6,995	$ 10,229	$ 8,865	8,495
Eastern Energy Gas Holdings, LLC [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Total equity				$ 3

Business Acquisitions (Details)

Business Acquisitions (Details) $ in Millions	Nov. 02, 2020USD ($)	Nov. 01, 2020USD ($)miBcf	Oct. 29, 2020USD ($)	Dec. 31, 2020USD ($)	Oct. 31, 2020USD ($)	Dec. 31, 2021USD ($)	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)	Jul. 03, 2020USD ($)
Business Acquisition [Line Items]
Acquisition, net of cash acquired							$ (2,397)	$ (27)	$ (106)
Goodwill				$ 11,506			11,506	9,722	9,595
Regulatory Assets				3,440			3,440	2,881
Deferred income taxes and amortization of investment tax credits							1,880	290	8
Increase in noncontrolling interests							3,916
Business acquisition, acquisition of remaining noncontrolling interest							33	0	131
Preferred Stock, Value, Issued				3,750			3,750	0
Revenues							20,952	19,844	19,787
Net income attributable to BHE shareholders							6,943	2,950	2,568
PacifiCorp [Member]
Business Acquisition [Line Items]
Goodwill				$ 1,129			1,129	1,129	1,129
Revenues							5,341	5,068	5,026
Net income attributable to BHE shareholders							$ 741	773	739
Iroquois Gas Transmission System L.P. [Member]
Business Acquisition [Line Items]
Equity method investment, ownership percentage				50.00%			50.00%
Natural Gas Transmission and Storage Transaction [Member]
Business Acquisition [Line Items]
Natural gas transmission line miles | mi		5,400
Natural gas transmission lines transportation per day capacity | Bcf		12.5
Natural gas operated storage capacity | Bcf		420
Natural gas company-owned working storage capacity | Bcf		306
Liquefied natural gas storage capacity | Bcf		14.6
Natural Gas Transmission and Storage Business Acquisition [Member]
Business Acquisition [Line Items]
Total assets assumed		$ 13,362
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Long-term Debt		1,200
Goodwill		1,732
Regulatory Assets		108
Deferred income taxes and amortization of investment tax credits					$ 275
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets		1,424
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities		1,567
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other		289
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities		6,932
Increase in noncontrolling interests					$ 3,916
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net		2,514
Payments to Acquire Businesses, Gross		2,500
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-term Debt		4,415								$ 5,600
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Regulatory Liabilities		661
Preferred Stock, Value, Issued			$ 3,750
Preferred Stock, Dividend Rate, Percentage			4.00%
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets		569
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment		9,254
Business Acquisition, Pro Forma Revenue							$ 22,581	21,979
Business Acquisition, Pro Forma Net Income (Loss)							$ 6,800	3,271
Direct Operating Costs				$ 9
Net income attributable to BHE shareholders				73
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents		104
Business Acquisition, Accounting Revision Period, Twelve Months							12 months
Natural Gas Transmission and Storage Business Acquisition [Member] | Variable Interest Entity, Primary Beneficiary [Member] | Cove Point LNG, LP [Member] | Limited Partner [Member]
Business Acquisition [Line Items]
Variable interest entity, ownership percentage							25.00%
Natural Gas Transmission and Storage Business Acquisition [Member] | Variable Interest Entity, Primary Beneficiary [Member] | Cove Point LNG, LP [Member] | General Partner [Member]
Business Acquisition [Line Items]
Variable interest entity, ownership percentage							100.00%
Natural Gas Transmission and Storage Business Acquisition [Member] | Variable Interest Entity, Primary Beneficiary [Member] | Cove Point LNG, LP [Member] | Other Ownership Interest
Business Acquisition [Line Items]
Variable interest entity, ownership percentage							25.00%
Natural Gas Transmission and Storage Business Acquisition [Member] | Domestic Tax Authority and State and Local Jurisdiction
Business Acquisition [Line Items]
Goodwill		$ 900
Natural Gas Transmission and Storage Business Acquisition [Member] | Goodwill [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Asset, Useful Life							15 years
Natural Gas Transmission and Storage Business Acquisition [Member] | Natural Gas
Business Acquisition [Line Items]
Revenues				331
Natural Gas Transmission and Storage Business Acquisition [Member] | Iroquois Gas Transmission System L.P. [Member]
Business Acquisition [Line Items]
Equity method investment, ownership percentage		50.00%
Questar Pipeline Group and Dominion Questar Transaction [Member]
Business Acquisition [Line Items]
Payments to Acquire Businesses, Gross	$ 1,300
Questar Pipeline Group and Dominion Questar Transaction [Member] | Forecast [Member]
Business Acquisition [Line Items]
Payments to Acquire Businesses, Gross						$ 1,300
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-term Debt						$ 430
Eastern Gas Transmission, Inc. [Member] | Natural Gas Transmission and Storage Business Acquisition [Member]
Business Acquisition [Line Items]
Ownership Percentage Acquired		100.00%
Carolina Gas Transmission, LLC [Member] | Natural Gas Transmission and Storage Business Acquisition [Member]
Business Acquisition [Line Items]
Ownership Percentage Acquired		100.00%
Eastern Energy Gas Holdings, LLC [Member]
Business Acquisition [Line Items]
Goodwill				1,286			$ 1,286	1,471
Regulatory Assets				$ 82			82	48
Deferred income taxes and amortization of investment tax credits							(5)	(3)	380
Revenues							2,090	2,169	1,996
Net income attributable to BHE shareholders							$ 109	$ 721	$ 481
Eastern Energy Gas Holdings, LLC [Member] | Variable Interest Entity, Primary Beneficiary [Member] | Cove Point LNG, LP [Member] | Limited Partner [Member]
Business Acquisition [Line Items]
Variable interest entity, ownership percentage							25.00%
Eastern Energy Gas Holdings, LLC [Member] | Variable Interest Entity, Primary Beneficiary [Member] | Cove Point LNG, LP [Member] | General Partner [Member]
Business Acquisition [Line Items]
Variable interest entity, ownership percentage							100.00%
Eastern Energy Gas Holdings, LLC [Member] | Iroquois Gas Transmission System L.P. [Member]
Business Acquisition [Line Items]
Equity method investment, ownership percentage				50.00%			50.00%
Variable interest entity, ownership percentage							50.00%

Business Acquisitions and Dis_3

Business Acquisitions and Dispositions - Narrative (Details) - USD ($) $ in Millions	Nov. 06, 2019	Nov. 30, 2020	Jul. 31, 2020	Jun. 30, 2015	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Iroquois Gas Transmission System L.P. [Member]
Business Acquisition [Line Items]
Equity method investment, ownership percentage					50.00%
Eastern Energy Gas Holdings, LLC [Member]
Business Acquisition [Line Items]
Contributions					$ 1,223	$ 3,385	$ 48
Noncontrolling Interest, Increase from Sale of Parent Equity Interest							4
Eastern Energy Gas Holdings, LLC [Member] | Noncontrolling Interest [Member]
Business Acquisition [Line Items]
Noncontrolling Interest, Increase from Sale of Parent Equity Interest							$ 4
Eastern Energy Gas Holdings, LLC [Member] | Cove Point LNG, LP [Member]
Business Acquisition [Line Items]
Noncontrolling interest distributed			25.00%
Ownership interest				75.00%
Eastern Energy Gas Holdings, LLC [Member] | White River Hub, LLC [Member]
Business Acquisition [Line Items]
Ownership interest				50.00%
Eastern Energy Gas Holdings, LLC [Member] | Iroquois Gas Transmission System L.P. [Member]
Business Acquisition [Line Items]
Ownership interest				25.93%
Eastern Energy Gas Holdings, LLC [Member] | GT&S Transaction [Member] | Disposal Group, Disposed of by Means Other than Sale, Not Discontinued Operations [Member] | Cove Point LNG, LP [Member]
Business Acquisition [Line Items]
Noncontrolling interest distributed		50.00%
Eastern Energy Gas Holdings, LLC [Member] | Dominion Energy Questar Pipeline [Member] | Disposal Group, Disposed of by Means Other than Sale, Not Discontinued Operations [Member]
Business Acquisition [Line Items]
Distribution of net assets					699
Stockholders' Equity, Distribution Of Net Assets Of Subsidiary To Affiliate, Cash					41
Contributions					1,300
Eastern Energy Gas Holdings, LLC [Member] | Dominion Energy Questar Pipeline [Member] | Disposal Group, Disposed of by Means Other than Sale, Not Discontinued Operations [Member] | Goodwill [Member]
Business Acquisition [Line Items]
Distribution of net assets					185
Eastern Energy Gas Holdings, LLC [Member] | Dominion Energy Questar Pipeline [Member] | Disposal Group, Disposed of by Means Other than Sale, Not Discontinued Operations [Member] | Pension Plan Asset [Member]
Business Acquisition [Line Items]
Distribution of net assets					895
Eastern Energy Gas Holdings, LLC [Member] | Dominion Energy Questar Pipeline [Member] | Disposal Group, Disposed of by Means Other than Sale, Not Discontinued Operations [Member] | Affiliated Balances
Business Acquisition [Line Items]
Distribution of net assets					107
Eastern Energy Gas Holdings, LLC [Member] | Cove Point LNG, LP [Member]
Business Acquisition [Line Items]
Noncontrolling Interest, Increase from Sale of Parent Equity Interest					0
Eastern Energy Gas Holdings, LLC [Member] | Cove Point LNG, LP [Member] | Noncontrolling Interest [Member]
Business Acquisition [Line Items]
Noncontrolling Interest, Increase from Sale of Parent Equity Interest					$ 2,765
Eastern Energy Gas Holdings, LLC [Member] | Cove Point LNG, LP [Member] | GT&S Transaction [Member] | Disposal Group, Disposed of by Means Other than Sale, Not Discontinued Operations [Member]
Business Acquisition [Line Items]
Noncontrolling interest distributed		50.00%
Eastern Energy Gas Holdings, LLC [Member] | White River Hub, LLC [Member]
Business Acquisition [Line Items]
Equity method investment, ownership percentage					50.00%
Eastern Energy Gas Holdings, LLC [Member] | Iroquois Gas Transmission System L.P. [Member]
Business Acquisition [Line Items]
Equity method investment, ownership percentage					50.00%
Dominion Energy, Inc. [Member] | Cove Point LNG, LP [Member]
Business Acquisition [Line Items]
Retained interest after disposal		50.00%
Ownership interest	25.00%	50.00%			50.00%

Business Acquisitions and Dis_4

Business Acquisitions and Dispositions - Discontinued Operations (Details) - USD ($) $ in Millions		10 Months Ended	12 Months Ended
		Nov. 06, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income tax expense				$ 33	$ 1
Charge related to a voluntary retirement program			$ 51	48
Accrued capital expenditures			801	888	823
Eastern Energy Gas Holdings, LLC [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income tax expense					1
Net income from discontinued operations	[1]		0	141	24
Charge related to a voluntary retirement program			4	4
Accrued capital expenditures			$ 30	$ 25	59
Eastern Energy Gas Holdings, LLC [Member] | East Ohio [Member] | Disposal Group, Disposed of by Means Other than Sale, Not Discontinued Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Operating revenue		$ 594			729
Depreciation and amortization		73			76
Other operating expenses		399			444
Other income (expense), net		28			35
Income tax expense		26			53
Net income from discontinued operations		124			191
Capital expenditures		299			352
Charge related to a voluntary retirement program		20			0
Accrued capital expenditures		2			5
Eastern Energy Gas Holdings, LLC [Member] | Eastern Gathering and Processing, Inc. [Member] | Disposal Group, Disposed of by Means Other than Sale, Not Discontinued Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Operating revenue		125			220
Depreciation and amortization		4			15
Other operating expenses		97			425
Income tax expense		7			(53)
Net income from discontinued operations		17			(167)
Capital expenditures		11			6
Impairment of assets		$ 0			$ (219)
[1]	Includes income tax expense of $33 million and less than $1 million for the years ended December 31, 2019 and 2018, respectively.

Property, Plant and Equipment_3

Property, Plant and Equipment, Net (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Property, plant and equipment, net	$ 86,128	$ 73,305	$ 68,087
Regulated Operation [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	103,397	89,292
Accumulated depreciation and amortization	(30,662)	(26,353)
Property, plant and equipment in service, net	72,735	62,939
Construction work-in-progress	3,200	3,600
Regulated Operation [Member] | Utility generation, distribution and transmission system [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 86,730	81,127
Regulated Operation [Member] | Utility generation, distribution and transmission system [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Depreciable life	5 years
Regulated Operation [Member] | Utility generation, distribution and transmission system [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Depreciable life	80 years
Regulated Operation [Member] | Interstate natural gas pipeline assets [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 16,667	8,165
Regulated Operation [Member] | Interstate natural gas pipeline assets [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Depreciable life	3 years
Regulated Operation [Member] | Interstate natural gas pipeline assets [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Depreciable life	80 years
Nonregulated Operation [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 12,671	8,817
Accumulated depreciation and amortization	(2,586)	(2,183)
Property, plant and equipment in service, net	10,085	6,634
Nonregulated Operation [Member] | Independent power plants [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	7,012	6,983
Nonregulated Operation [Member] | Other assets [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	5,659	1,834
Common Facilities [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment in service, net	82,820	69,573
Construction work-in-progress	3,308	3,732
Property, plant and equipment, net	$ 86,128	73,305
Nonregulated Operation [Member] | Independent power plants [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Depreciable life	5 years
Nonregulated Operation [Member] | Independent power plants [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Depreciable life	30 years
Nonregulated Operation [Member] | Other assets [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Depreciable life	3 years
Nonregulated Operation [Member] | Other assets [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Depreciable life	40 years
PacifiCorp [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, net	$ 22,430	20,973	19,570
MidAmerican Funding [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, net	$ 19,279	$ 18,377	$ 16,169

Property, Plant and Equipment_4

Property, Plant and Equipment, Net - PacifiCorp (Details) - PacifiCorp [Member] - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Electric Property Plant And Equipment In Service Gross			$ 30,717	$ 28,763
Public utility accumulated depreciation and amortization			(9,838)	(9,803)
Public Utilities, Property, Plant and Equipment, Net, Excluding Construction Work In Progress			20,888	18,970
Construction work- in-progress			1,542	2,003
Property, plant and equipment, net			$ 22,430	$ 20,973
Public Utilities, Property, Plant and Equipment, Disclosure of Composite Depreciation Rate for Plants in Service			4.10%	3.30%	3.50%
Public Utilities, Property, Plant and Equipment, Amount of Acquisition Adjustments			$ 156
Public Utilities, Property, Plant and Equipment, Amount of Acquisition Adjustments, Related Accumulated Depreciation			140	$ 132
Restructuring and Related Cost, Accelerated Depreciation			$ 376	125	$ 174
Revised depreciation rates, 2021 depreciation increase | Forecast [Member]
Property, Plant and Equipment [Line Items]
Depreciation		$ 176
Minimum [Member]
Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Generation, Useful Life			14 years
Public Utilities, Property, Plant and Equipment, Transmission, Useful Life			58 years
Public Utilities, Property, Plant and Equipment, Distribution, Useful Life			20 years
Finite-Lived Intangible Asset, Useful Life	[1]		5 years
Public Utilities, Property, Plant and Equipment, Other Property Plant and Equipment, Useful Life			5 years
Maximum [Member]
Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Generation, Useful Life			67 years
Public Utilities, Property, Plant and Equipment, Transmission, Useful Life			75 years
Public Utilities, Property, Plant and Equipment, Distribution, Useful Life			70 years
Finite-Lived Intangible Asset, Useful Life	[1]		75 years
Public Utilities, Property, Plant and Equipment, Other Property Plant and Equipment, Useful Life			60 years
Electricity Generation Plant, Non-Nuclear [Member]
Property, Plant and Equipment [Line Items]
Electric Property Plant And Equipment In Service Gross			$ 12,861	12,509
Electric Transmission [Member]
Property, Plant and Equipment [Line Items]
Electric Property Plant And Equipment In Service Gross			7,632	6,482
Electric Distribution [Member]
Property, Plant and Equipment [Line Items]
Electric Property Plant And Equipment In Service Gross			7,660	7,307
Other Intangible Assets [Member]
Property, Plant and Equipment [Line Items]
Electric Property Plant And Equipment In Service Gross	[1]		1,054	1,016
Other Capitalized Property Plant and Equipment [Member]
Property, Plant and Equipment [Line Items]
Electric Property Plant And Equipment In Service Gross			$ 1,510	1,449
Computer Software, Intangible Asset [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Finite-Lived Intangible Asset, Useful Life			5 years
Computer Software, Intangible Asset [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Finite-Lived Intangible Asset, Useful Life			10 years
Regulated Operation [Member]
Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Net, Excluding Construction Work In Progress			$ 20,879	18,960
Nonregulated Operation [Member]
Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Net, Excluding Construction Work In Progress			$ 9	$ 10
Nonregulated Operation [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Other Property Plant and Equipment, Useful Life			14 years
Nonregulated Operation [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Other Property Plant and Equipment, Useful Life			95 years
[1]	Computer software costs included in intangible plant are initially assigned a depreciable life of 5 to 10 years.

Property, Plant and Equipment_5

Property, Plant and Equipment, Net - MEC (Details) - MidAmerican Energy Company [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Public Utility, Property, Plant and Equipment [Line Items]
Plant, net	$ 18,773	$ 17,593
Property, plant and equipment, net	$ 19,279	$ 18,375
Regulated Electric [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Disclosure of Composite Depreciation Rate for Plants in Service	3.20%	3.10%	2.90%
Natural Gas Processing Plant [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Disclosure of Composite Depreciation Rate for Plants in Service	2.80%	2.80%	2.80%
Regulated Operation [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Plant in service, net	$ 25,669	$ 23,726
Accumulated depreciation and amortization	(6,902)	(6,139)
Plant, net	18,767	17,587
Construction work- in-progress	506	782
Regulated Operation [Member] | Electric Operations [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Generation or Processing	16,980	15,687
Public Utilities, Property, Plant and Equipment, Transmission	2,365	2,124
Public Utilities, Property, Plant and Equipment, Distribution	4,369	4,095
Regulated Operation [Member] | Natural Gas Processing Plant [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Distribution	1,955	1,820
Nonregulated Operation [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Accumulated depreciation and amortization	(1)	(1)
Plant, net	6	6
Gross public utility property, plant and equipment in service	$ 7	$ 7
Minimum [Member] | Regulated Operation [Member] | Electric Operations [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Generation, Useful Life	20 years
Public Utilities, Property, Plant and Equipment, Transmission, Useful Life	52 years
Public Utilities, Property, Plant and Equipment, Distribution, Useful Life	20 years
Minimum [Member] | Regulated Operation [Member] | Natural Gas Processing Plant [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Distribution, Useful Life	29 years
Minimum [Member] | Nonregulated Operation [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Other Property Plant and Equipment, Useful Life	20 years
Maximum [Member] | Regulated Operation [Member] | Electric Operations [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Generation, Useful Life	70 years
Public Utilities, Property, Plant and Equipment, Transmission, Useful Life	75 years
Public Utilities, Property, Plant and Equipment, Distribution, Useful Life	75 years
Maximum [Member] | Regulated Operation [Member] | Natural Gas Processing Plant [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Distribution, Useful Life	75 years
Maximum [Member] | Nonregulated Operation [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Other Property Plant and Equipment, Useful Life	50 years

Property, Plant and Equipment_6

Property, Plant and Equipment, Net - LLC (Details) - Other Capitalized Property Plant and Equipment [Member] - MidAmerican Funding, LLC and Subsidiaries [Member] - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 0	$ 3
Accumulated depreciation and amortization	$ 0	$ 1

Property, Plant and Equipment_7

Property, Plant and Equipment, Net - NPC (Details) - Nevada Power Company [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Plant, net	$ 6,559	$ 6,343
Construction work- in-progress	142	195
Property, plant and equipment, net	$ 6,701	$ 6,538
Public Utilities, Property, Plant and Equipment, Disclosure of Composite Depreciation Rate for Plants in Service	3.10%	3.30%	3.20%
Regulated Operation [Member]
Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Generation or Processing	$ 3,690	$ 3,541
Public Utilities, Property, Plant and Equipment, Distribution	3,771	3,567
Public Utilities, Property, Plant and Equipment, Transmission	1,468	1,444
Public Utilities, Property, Plant and Equipment, Other Property, Plant and Equipment	791	741
Plant in service, net	9,720	9,293
Public Utilities, Property, Plant and Equipment, Accumulated Depreciation	3,162	2,951
Plant, net	6,558	6,342
Nonregulated Operation [Member]
Property, Plant and Equipment [Line Items]
Plant, net	$ 1	$ 1
Public Utilities, Property, Plant and Equipment, Other Property Plant and Equipment, Useful Life	45 years
Minimum [Member] | Regulated Operation [Member]
Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Generation, Useful Life	30 years
Public Utilities, Property, Plant and Equipment, Distribution, Useful Life	20 years
Public Utilities, Property, Plant and Equipment, Transmission, Useful Life	45 years
Public Utilities, Property, Plant and Equipment, Other Property Plant and Equipment, Useful Life	5 years
Maximum [Member] | Regulated Operation [Member]
Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Generation, Useful Life	55 years
Public Utilities, Property, Plant and Equipment, Distribution, Useful Life	65 years
Public Utilities, Property, Plant and Equipment, Transmission, Useful Life	70 years
Public Utilities, Property, Plant and Equipment, Other Property Plant and Equipment, Useful Life	65 years

Property, Plant and Equipment_8

Property, Plant and Equipment, Net - SPPC (Details) - Sierra Pacific Power Company [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Public Utility, Property, Plant and Equipment [Line Items]
Plant, net	$ 3,027	$ 2,962
Construction work- in-progress	137	113
Property, plant and equipment, net	$ 3,164	$ 3,075
Public Utilities, Property, Plant and Equipment, Disclosure of Composite Depreciation Rate for Plants in Service	3.20%	3.10%	3.10%
Regulated Operation [Member] | Electricity Generation Plant, Non-Nuclear [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Generation or Processing	$ 1,130	$ 1,133
Public Utilities, Property, Plant and Equipment, Distribution	1,754	1,669
Public Utilities, Property, Plant and Equipment, Transmission	908	840
Public Utilities, Property, Plant and Equipment, Other Property, Plant and Equipment	$ 189	178
Regulated Operation [Member] | Electricity Generation Plant, Non-Nuclear [Member] | Minimum [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Generation, Useful Life	25 years
Public Utilities, Property, Plant and Equipment, Distribution, Useful Life	20 years
Public Utilities, Property, Plant and Equipment, Transmission, Useful Life	50 years
Public Utilities, Property, Plant and Equipment, Other Property Plant and Equipment, Useful Life	5 years
Regulated Operation [Member] | Electricity Generation Plant, Non-Nuclear [Member] | Maximum [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Generation, Useful Life	60 years
Public Utilities, Property, Plant and Equipment, Distribution, Useful Life	100 years
Public Utilities, Property, Plant and Equipment, Transmission, Useful Life	100 years
Public Utilities, Property, Plant and Equipment, Other Property Plant and Equipment, Useful Life	70 years
Regulated Operation [Member] | Natural Gas Processing Plant [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Distribution	$ 429	417
Public Utilities, Property, Plant and Equipment, Other Property, Plant and Equipment	$ 15	14
Regulated Operation [Member] | Natural Gas Processing Plant [Member] | Minimum [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Distribution, Useful Life	35 years
Public Utilities, Property, Plant and Equipment, Other Property Plant and Equipment, Useful Life	5 years
Regulated Operation [Member] | Natural Gas Processing Plant [Member] | Maximum [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Distribution, Useful Life	70 years
Public Utilities, Property, Plant and Equipment, Other Property Plant and Equipment, Useful Life	70 years
Regulated Operation [Member] | Common Facilities [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Common	$ 355	338
Plant in service, net	4,780	4,589
Accumulated depreciation and amortization	(1,755)	(1,629)
Plant, net	$ 3,025	2,960
Regulated Operation [Member] | Common Facilities [Member] | Minimum [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Common, Useful Life	5 years
Regulated Operation [Member] | Common Facilities [Member] | Maximum [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Common, Useful Life	70 years
Nonregulated Operation [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Plant, net	$ 2	$ 2
Public Utilities, Property, Plant and Equipment, Other Property Plant and Equipment, Useful Life	70 years

Property, Plant and Equipment_9

Property, Plant and Equipment, Net - EEGH (Details) - Eastern Energy Gas Holdings, LLC [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Public Utility, Property, Plant and Equipment [Line Items]
Plant, net	$ 9,934	$ 11,008
Construction work- in-progress	210	719
Property, plant and equipment, net	10,144	11,727
Regulated Operation [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Plant in service, net	8,497	10,168
Accumulated depreciation and amortization	(2,759)	(3,414)
Plant, net	5,738	6,754
Construction work- in-progress	196	584
Nonregulated Operation [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Plant in service, net	4,479	4,450
Accumulated depreciation and amortization	(283)	(196)
Plant, net	$ 4,196	4,254
Interstate natural gas pipeline assets [Member] | Minimum [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Depreciable life	24 years
Interstate natural gas pipeline assets [Member] | Maximum [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Depreciable life	43 years
Interstate natural gas pipeline assets [Member] | Regulated Operation [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Plant in service, net	$ 8,382	10,025
Other Intangible Assets [Member] | Minimum [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Depreciable life	5 years
Other Intangible Assets [Member] | Maximum [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Depreciable life	10 years
Other Intangible Assets [Member] | Regulated Operation [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Plant in service, net	$ 115	143
Other Intangible Assets [Member] | Nonregulated Operation [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Depreciable life	14 years
Plant in service, net	$ 25	25
LNG Facility [Member] | Nonregulated Operation [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Depreciable life	40 years
Plant in service, net	$ 4,454	$ 4,425

Property, Plant and Equipmen_10

Property, Plant and Equipment, Net - EEGH - EGH Gathering and Processing (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2018	Dec. 31, 2020	Dec. 31, 2019
Eastern Energy Gas Holdings, LLC [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Construction work- in-progress		$ 210	$ 719
Eastern Energy Gas Holdings, LLC [Member] | Eastern Gathering and Processing, Inc. [Member] | Discontinued Operations, Held-for-sale [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Impairment of assets	$ 219
Impairment of assets, after-tax	165
Eastern Energy Gas Holdings, LLC [Member] | Regulated Operation [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Construction work- in-progress		$ 196	$ 584
Eastern Gathering and Processing, Inc. [Member] | Fair Value, Inputs, Level 3 [Member] | Estimate of Fair Value Measurement [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Estimated fair value	$ 190

Property, Plant and Equipmen_11

Property, Plant and Equipment, Net - EEGH - Assignments of Shale Development Rights (Details) - Eastern Energy Gas Holdings, LLC [Member] a in Thousands, $ in Millions	1 Months Ended					12 Months Ended
	Jun. 30, 2018USD ($)a	Mar. 31, 2018USD ($)a	Jan. 31, 2018USD ($)a	Nov. 30, 2014USD ($)a	Dec. 31, 2013USD ($)anaturalGasProducer	Dec. 31, 2018USD ($)	Sep. 30, 2018USD ($)	Aug. 31, 2017a
Marcellus Shale Development Rights [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Number of natural gas producers | naturalGasProducer					2
Development rights (in acres) | a	9		18	24	100			70
Payments, subject to customary adjustments	$ 6		$ 28	$ 120	$ 200		$ 65
Agreement term				4 years	9 years
Remaining interest			50.00%					68.00%
Gain on disposal	6		$ 28			$ 65
Gain on disposal, after-tax	$ 4		$ 20			$ 47
Utica and Point Pleasant Shale Development Rights [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Development rights (in acres) | a		11
Payments, subject to customary adjustments		$ 16
Gain on disposal		16
Gain on disposal, after-tax		$ 12

Jointly Owned Utility Facilit_3

Jointly Owned Utility Facilities (Details) $ in Millions	Dec. 31, 2020USD ($)
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	$ 10,443
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	5,167
Construction Work in Progress	172
Nevada Power Company [Member]
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	201
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	53
Construction Work in Progress	1
Eastern Energy Gas Holdings, LLC [Member]
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	439
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	141
Construction Work in Progress	$ 11
Navajo Generating Station [Member] | Nevada Power Company [Member]
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Proportionate Ownership Share	11.00%	[1]
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	$ 10	[1]
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	4	[1]
Construction Work in Progress	$ 0	[1]
ON Line deferrals | Nevada Power Company [Member]
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Proportionate Ownership Share	19.00%
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	$ 125
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	20
Construction Work in Progress	$ 1
Ellisburg Pool [Member] | Eastern Energy Gas Holdings, LLC [Member]
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Proportionate Ownership Share	39.00%
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	$ 28
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	10
Construction Work in Progress	$ 2
Ellisburg Station [Member] | Eastern Energy Gas Holdings, LLC [Member]
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Proportionate Ownership Share	50.00%
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	$ 25
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	7
Construction Work in Progress	$ 1
Harrison [Member] | Eastern Energy Gas Holdings, LLC [Member]
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Proportionate Ownership Share	50.00%
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	$ 53
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	16
Construction Work in Progress	$ 3
Leidy [Member] | Eastern Energy Gas Holdings, LLC [Member]
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Proportionate Ownership Share	50.00%
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	$ 133
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	44
Construction Work in Progress	$ 3
Oakford [Member] | Eastern Energy Gas Holdings, LLC [Member]
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Proportionate Ownership Share	50.00%
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	$ 200
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	64
Construction Work in Progress	2
PacifiCorp [Member]
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	4,535
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	2,171
Construction Work in Progress	$ 126
PacifiCorp [Member] | Jim Bridger Unit Nos 1 thru 4 [Member]
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Proportionate Ownership Share	67.00%
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	$ 1,485
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	714
Construction Work in Progress	$ 15
PacifiCorp [Member] | Hunter Unit No 1 [Member]
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Proportionate Ownership Share	94.00%
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	$ 486
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	203
Construction Work in Progress	$ 1
PacifiCorp [Member] | Hunter No. 2 [Member]
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Proportionate Ownership Share	60.00%
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	$ 305
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	127
Construction Work in Progress	$ 0
PacifiCorp [Member] | Wyodak [Member]
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Proportionate Ownership Share	80.00%
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	$ 476
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	254
Construction Work in Progress	$ 2
PacifiCorp [Member] | Colstrip Unit Nos 3 and 4 [Member]
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Proportionate Ownership Share	10.00%
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	$ 255
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	145
Construction Work in Progress	$ 6
PacifiCorp [Member] | Hermiston [Member]
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Proportionate Ownership Share	50.00%
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	$ 184
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	93
Construction Work in Progress	$ 2
PacifiCorp [Member] | Craig Units Nos 1 and 2 [Member]
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Proportionate Ownership Share	19.00%
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	$ 368
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	305
Construction Work in Progress	$ 0
PacifiCorp [Member] | Hayden Unit No 1 [Member]
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Proportionate Ownership Share	25.00%
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	$ 75
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	42
Construction Work in Progress	$ 0
PacifiCorp [Member] | Hayden No. 2 [Member]
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Proportionate Ownership Share	13.00%
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	$ 44
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	25
Construction Work in Progress	0
PacifiCorp [Member] | Transmission and distribution facilities
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	857
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	263
Construction Work in Progress	100
MidAmerican Energy Company [Member]
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	4,562
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	2,337
Construction Work in Progress	32
MidAmerican Energy Company [Member] | Transmission and distribution facilities
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	261
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	101
Construction Work in Progress	$ 0
MidAmerican Energy Company [Member] | Louisa Unit No 1 [Member]
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Proportionate Ownership Share	88.00%
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	$ 853
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	483
Construction Work in Progress	$ 2
MidAmerican Energy Company [Member] | Quad Cities Unit Nos 1 and 2 [Member]
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Proportionate Ownership Share	25.00%	[1]
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	$ 731	[1]
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	437	[1]
Construction Work in Progress	$ 10	[1]
MidAmerican Energy Company [Member] | Walter Scott, Jr. No. 3 [Member]
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Proportionate Ownership Share	79.00%
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	$ 939
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	498
Construction Work in Progress	$ 7
MidAmerican Energy Company [Member] | Walter Scott Jr Unit No 4 [Member]
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Proportionate Ownership Share	60.00%	[2]
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	$ 267	[2]
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	130	[2]
Construction Work in Progress	$ 3	[2]
MidAmerican Energy Company [Member] | George Neal No. 4 [Member]
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Proportionate Ownership Share	41.00%
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	$ 318
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	179
Construction Work in Progress	$ 3
MidAmerican Energy Company [Member] | Ottumwa Unit No 1 [Member]
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Proportionate Ownership Share	52.00%
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	$ 669
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	247
Construction Work in Progress	$ 5
MidAmerican Energy Company [Member] | George Neal Unit No 3 [Member]
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Proportionate Ownership Share	72.00%
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	$ 524
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	262
Construction Work in Progress	2
NV Energy [Member]
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	630
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	353
Construction Work in Progress	3
NV Energy [Member] | Transmission and distribution facilities
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	70
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	31
Construction Work in Progress	$ 1
NV Energy [Member] | Navajo Generating Station [Member]
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Proportionate Ownership Share	11.00%
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	$ 10
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	4
Construction Work in Progress	$ 0
NV Energy [Member] | Valmy [Member]
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Proportionate Ownership Share	50.00%
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	$ 390
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	291
Construction Work in Progress	$ 1
NV Energy [Member] | ON Line deferrals
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Proportionate Ownership Share	25.00%
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	$ 160
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	27
Construction Work in Progress	1
BHE Pipeline Group [Member]
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	716
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	306
Construction Work in Progress	11
BHE Pipeline Group [Member] | BHE Pipeline Group - common facilities [Member]
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	277
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	165
Construction Work in Progress	$ 0
[1]	Includes amounts related to nuclear fuel.
[2]	Facility in-service and accumulated depreciation and amortization amounts are net of credits applied under Iowa revenue sharing arrangements totaling $509 million and $112 million, respectively.

Jointly Owned Utility Facilit_4

Jointly Owned Utility Facilities - PacifiCorp (Details) $ in Millions	12 Months Ended
	Dec. 31, 2020USD ($)
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	$ 10,443
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	5,167
Jointly Owned Utility Plant, Ownership Amount of Construction Work in Progress	172
PacifiCorp [Member]
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	4,535
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	2,171
Jointly Owned Utility Plant, Ownership Amount of Construction Work in Progress	$ 126
PacifiCorp [Member] | Jim Bridger Unit Nos 1 thru 4 [Member]
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Proportionate Ownership Share	67.00%
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	$ 1,485
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	714
Jointly Owned Utility Plant, Ownership Amount of Construction Work in Progress	$ 15
PacifiCorp [Member] | Hunter Unit No 1 [Member]
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Proportionate Ownership Share	94.00%
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	$ 486
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	203
Jointly Owned Utility Plant, Ownership Amount of Construction Work in Progress	$ 1
PacifiCorp [Member] | Hunter No. 2 [Member]
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Proportionate Ownership Share	60.00%
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	$ 305
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	127
Jointly Owned Utility Plant, Ownership Amount of Construction Work in Progress	$ 0
PacifiCorp [Member] | Wyodak [Member]
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Proportionate Ownership Share	80.00%
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	$ 476
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	254
Jointly Owned Utility Plant, Ownership Amount of Construction Work in Progress	$ 2
PacifiCorp [Member] | Colstrip Unit Nos 3 and 4 [Member]
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Proportionate Ownership Share	10.00%
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	$ 255
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	145
Jointly Owned Utility Plant, Ownership Amount of Construction Work in Progress	$ 6
PacifiCorp [Member] | Hermiston [Member]
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Proportionate Ownership Share	50.00%
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	$ 184
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	93
Jointly Owned Utility Plant, Ownership Amount of Construction Work in Progress	$ 2
PacifiCorp [Member] | Craig Units Nos 1 and 2 [Member]
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Proportionate Ownership Share	19.00%
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	$ 368
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	305
Jointly Owned Utility Plant, Ownership Amount of Construction Work in Progress	$ 0
PacifiCorp [Member] | Hayden Unit No 1 [Member]
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Proportionate Ownership Share	25.00%
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	$ 75
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	42
Jointly Owned Utility Plant, Ownership Amount of Construction Work in Progress	$ 0
PacifiCorp [Member] | Hayden No. 2 [Member]
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Proportionate Ownership Share	13.00%
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	$ 44
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	25
Jointly Owned Utility Plant, Ownership Amount of Construction Work in Progress	$ 0
PacifiCorp [Member] | Transmission and distribution facilities
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Proportionate Ownership Percentage Share	Various
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	$ 857
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	263
Jointly Owned Utility Plant, Ownership Amount of Construction Work in Progress	$ 100

Jointly Owned Utility Facilit_5

Jointly Owned Utility Facilities - MEC (Details) $ in Millions	Dec. 31, 2020USD ($)
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	$ 10,443
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	5,167
Jointly Owned Utility Plant, Ownership Amount of Construction Work in Progress	172
MidAmerican Energy Company [Member]
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	4,562
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	2,337
Jointly Owned Utility Plant, Ownership Amount of Construction Work in Progress	$ 32
MidAmerican Energy Company [Member] | Louisa Unit No 1 [Member]
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Proportionate Ownership Share	88.00%
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	$ 853
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	483
Jointly Owned Utility Plant, Ownership Amount of Construction Work in Progress	$ 2
MidAmerican Energy Company [Member] | Quad Cities Unit Nos 1 and 2 [Member]
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Proportionate Ownership Share	25.00%	[1]
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	$ 731	[1]
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	437	[1]
Jointly Owned Utility Plant, Ownership Amount of Construction Work in Progress	$ 10	[1]
MidAmerican Energy Company [Member] | Walter Scott, Jr. No. 3 [Member]
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Proportionate Ownership Share	79.00%
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	$ 939
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	498
Jointly Owned Utility Plant, Ownership Amount of Construction Work in Progress	$ 7
MidAmerican Energy Company [Member] | Walter Scott Jr Unit No 4 [Member]
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Proportionate Ownership Share	60.00%	[2]
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	$ 267	[2]
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	130	[2]
Jointly Owned Utility Plant, Ownership Amount of Construction Work in Progress	3	[2]
Revenue sharing credits netted against facility in service	509
Revenue sharing credits netted against accumulated depreciation	$ 112
MidAmerican Energy Company [Member] | George Neal No. 4 [Member]
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Proportionate Ownership Share	41.00%
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	$ 318
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	179
Jointly Owned Utility Plant, Ownership Amount of Construction Work in Progress	$ 3
MidAmerican Energy Company [Member] | Ottumwa Unit No 1 [Member]
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Proportionate Ownership Share	52.00%
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	$ 669
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	247
Jointly Owned Utility Plant, Ownership Amount of Construction Work in Progress	$ 5
MidAmerican Energy Company [Member] | George Neal Unit No 3 [Member]
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Proportionate Ownership Share	72.00%
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	$ 524
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	262
Jointly Owned Utility Plant, Ownership Amount of Construction Work in Progress	2
MidAmerican Energy Company [Member] | Transmission facilities
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	261
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	101
Jointly Owned Utility Plant, Ownership Amount of Construction Work in Progress	$ 0
[1]	Includes amounts related to nuclear fuel.
[2]	Plant in service and accumulated depreciation and amortization amounts are net of credits applied under Iowa regulatory arrangements totaling $509 million and $112 million, respectively.

Jointly Owned Utility Facilit_6

Jointly Owned Utility Facilities - NPC (Details) $ in Millions	Dec. 31, 2020USD ($)
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	$ 10,443
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	5,167
Jointly Owned Utility Plant, Ownership Amount of Construction Work in Progress	172
Nevada Power Company [Member]
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	201
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	53
Jointly Owned Utility Plant, Ownership Amount of Construction Work in Progress	$ 1
Nevada Power Company [Member] | Navajo Generating Station [Member]
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Proportionate Ownership Share	11.00%	[1]
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	$ 10	[1]
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	4	[1]
Jointly Owned Utility Plant, Ownership Amount of Construction Work in Progress	$ 0	[1]
Nevada Power Company [Member] | ON Line deferrals
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Proportionate Ownership Share	19.00%
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	$ 125
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	20
Jointly Owned Utility Plant, Ownership Amount of Construction Work in Progress	1
Nevada Power Company [Member] | Other Transmission Facilities [Member]
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	66
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	29
Jointly Owned Utility Plant, Ownership Amount of Construction Work in Progress	$ 0
[1]	Includes amounts related to nuclear fuel.

Jointly Owned Utility Facilit_7

Jointly Owned Utility Facilities - SPPC (Details) $ in Millions	Dec. 31, 2020USD ($)
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	$ 10,443
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	5,167
Jointly Owned Utility Plant, Ownership Amount of Construction Work in Progress	172
Sierra Pacific Power Company [Member]
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	429
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	300
Jointly Owned Utility Plant, Ownership Amount of Construction Work in Progress	$ 1
Sierra Pacific Power Company [Member] | Valmy [Member]
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Proportionate Ownership Share	50.00%
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	$ 390
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	291
Jointly Owned Utility Plant, Ownership Amount of Construction Work in Progress	$ 1
Sierra Pacific Power Company [Member] | ON Line deferrals
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Proportionate Ownership Share	6.00%
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	$ 35
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	7
Jointly Owned Utility Plant, Ownership Amount of Construction Work in Progress	$ 0
Sierra Pacific Power Company [Member] | Valmy Transmission Line [Member]
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Proportionate Ownership Share	50.00%
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	$ 4
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	2
Jointly Owned Utility Plant, Ownership Amount of Construction Work in Progress	$ 0

Jointly Owned Utility Facilit_8

Jointly Owned Utility Facilities - EEGH (Details) $ in Millions	Dec. 31, 2020USD ($)
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	$ 10,443
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	5,167
Jointly Owned Utility Plant, Ownership Amount of Construction Work in Progress	172
Eastern Energy Gas Holdings, LLC [Member]
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	439
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	141
Jointly Owned Utility Plant, Ownership Amount of Construction Work in Progress	$ 11
Ellisburg Pool [Member] | Eastern Energy Gas Holdings, LLC [Member]
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Proportionate Ownership Share	39.00%
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	$ 28
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	10
Jointly Owned Utility Plant, Ownership Amount of Construction Work in Progress	$ 2
Ellisburg Station [Member] | Eastern Energy Gas Holdings, LLC [Member]
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Proportionate Ownership Share	50.00%
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	$ 25
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	7
Jointly Owned Utility Plant, Ownership Amount of Construction Work in Progress	$ 1
Harrison [Member] | Eastern Energy Gas Holdings, LLC [Member]
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Proportionate Ownership Share	50.00%
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	$ 53
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	16
Jointly Owned Utility Plant, Ownership Amount of Construction Work in Progress	$ 3
Leidy [Member] | Eastern Energy Gas Holdings, LLC [Member]
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Proportionate Ownership Share	50.00%
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	$ 133
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	44
Jointly Owned Utility Plant, Ownership Amount of Construction Work in Progress	$ 3
Oakford [Member] | Eastern Energy Gas Holdings, LLC [Member]
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Proportionate Ownership Share	50.00%
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	$ 200
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	64
Jointly Owned Utility Plant, Ownership Amount of Construction Work in Progress	$ 2

Leases - Summary (Details)

Leases - Summary (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Leases [Abstract]
Operating Lease, Right-of-Use Asset	$ 517	$ 525
Finance Lease, Right-of-Use Asset	501	504
Total Right-of-Use Asset	1,018	1,029
Operating Lease, Liability	569
Finance Lease, Liability	514
Total Lease Liabilities	1,083	1,096
Lessee, Lease, Description [Line Items]
Operating Lease, Liability	569
Finance Lease, Liability	514
Other Liabilities
Leases [Abstract]
Operating Lease, Liability	569	577
Lessee, Lease, Description [Line Items]
Operating Lease, Liability	569	577
Other Noncurrent Liabilities [Member]
Leases [Abstract]
Finance Lease, Liability	514	519
Lessee, Lease, Description [Line Items]
Finance Lease, Liability	$ 514	$ 519

Leases - Lease Costs (Details)

Leases - Lease Costs (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Leases [Abstract]
Variable Lease, Cost	$ 592	$ 623
Operating	151	170
Amortization	18	16
Finance Lease, Interest Expense	40	41
Short-term	20	7
Lease, Cost	$ 821	$ 857
Operating Lease, Weighted Average Remaining Lease Term	7 years 4 months 24 days	7 years 7 months 6 days
Finance Lease, Weighted Average Remaining Lease Term	27 years 6 months	28 years 9 months 18 days
Operating Lease, Weighted Average Discount Rate, Percent	4.50%	5.20%
Finance Lease, Weighted Average Discount Rate, Percent	8.50%	8.60%

Leases - Other (Details)

Leases - Other (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Leases [Abstract]
Operating Lease, Payments	$ (152)	$ (153)
Finance Lease, Interest Payment on Liability	(40)	(42)
Finance Lease, Principal Payments	(24)	(19)
Operating cash flows from operating leases	83	82
Right-of-Use Asset Obtained in Exchange for Finance Lease Liability	$ 19	$ 14

Leases - Maturity Table (Detail

Leases - Maturity Table (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Leases [Abstract]
Lessee, Operating Lease, Liability, Payments, Due Next Twelve Months	$ 152
Finance Lease, Liability, Payments, Due Next Twelve Months	81
Lease, Liability, Payments, Due Next Twelve Months	233
Lessee, Operating Lease, Liability, Payments, Due Year Two	125
Finance Lease, Liability, Payments, Due Year Two	74
Lease, Liability, Payments, Due Year Two	199
Lessee, Operating Lease, Liability, Payments, Due Year Three	93
Finance Lease, Liability, Payments, Due Year Three	63
Lease, Liability, Payments, Due Year Three	156
Lessee, Operating Lease, Liability, Payments, Due Year Four	66
Finance Lease, Liability, Payments, Due Year Four	63
Lease, Liability, Payments, Due Year Four	129
Lessee, Operating Lease, Liability, Payments, Due Year Five	50
Finance Lease, Liability, Payments, Due Year Five	62
Lease, Liability, Payments, Due Year Five	112
Lessee, Operating Lease, Liability, Payments, Due after Year Five	199
Finance Lease, Liability, Payments, Due after Year Five	673
Lease, Liability, Payments, Due after Year Five	872
Lessee, Operating Lease, Liability, Payments, Due	685
Finance Lease, Liability, Payment, Due	1,016
Lease, Liability, Payments, Due	1,701
Lessee, Operating Lease, Liability, Undiscounted Excess Amount	(116)
Finance Lease, Liability, Undiscounted Excess Amount	(502)
Lease, Liability, Undiscounted Excess Amount	(618)
Operating Lease, Liability	569
Finance Lease, Liability	514
Total Lease Liabilities	$ 1,083	$ 1,096
Operating Lease, Liability, Statement of Financial Position [Extensible List]	us-gaap:OtherLiabilitiesCurrent
Finance Lease, Liability, Statement of Financial Position [Extensible List]	us-gaap:OtherLiabilitiesNoncurrent

Leases - PAC - Summary (Details

Leases - PAC - Summary (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Lessee, Lease, Description [Line Items]
Operating Lease, Right-of-Use Asset	$ 517	$ 525
Finance Lease, Right-of-Use Asset	501	504
Total Right-of-Use Asset	1,018	1,029
Operating Lease, Liability	569
Finance Lease, Liability	514
Total Lease Liabilities	1,083	1,096
PacifiCorp [Member]
Lessee, Lease, Description [Line Items]
Operating Lease, Right-of-Use Asset	11	12
Finance Lease, Right-of-Use Asset	17	19
Total Right-of-Use Asset	28	31
Operating Lease, Liability	11	12
Finance Lease, Liability	17	19
Total Lease Liabilities	$ 28	$ 31

Leases - PAC - Lease Costs (Det

Leases - PAC - Lease Costs (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Lessee, Lease, Description [Line Items]
Variable Lease, Cost	$ 592	$ 623
Operating	151	170
Amortization	18	16
Finance Lease, Interest Expense	40	41
Short-term	20	7
Lease, Cost	$ 821	$ 857
Finance Lease, Weighted Average Remaining Lease Term	27 years 6 months	28 years 9 months 18 days
Operating Lease, Weighted Average Discount Rate, Percent	4.50%	5.20%
Finance Lease, Weighted Average Discount Rate, Percent	8.50%	8.60%
Operating Lease, Weighted Average Remaining Lease Term	7 years 4 months 24 days	7 years 7 months 6 days
PacifiCorp [Member]
Lessee, Lease, Description [Line Items]
Variable Lease, Cost	$ 60	$ 77
Operating	3	3
Amortization	2	1
Finance Lease, Interest Expense	2	2
Short-term	1	2
Lease, Cost	$ 68	$ 85
Finance Lease, Weighted Average Remaining Lease Term	8 years 4 months 24 days	9 years 1 month 6 days
Operating Lease, Weighted Average Discount Rate, Percent	3.80%	3.70%
Finance Lease, Weighted Average Discount Rate, Percent	10.50%	10.60%
Operating Lease, Weighted Average Remaining Lease Term	13 years 10 months 24 days	14 years

Leases - PAC - Maturity Table (

Leases - PAC - Maturity Table (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Lessee, Operating Lease, Liability, Payment, Due [Abstract]
Lessee, Operating Lease, Liability, Payments, Due Next Twelve Months	$ 152
Lessee, Operating Lease, Liability, Payments, Due Year Two	125
Lessee, Operating Lease, Liability, Payments, Due Year Three	93
Lessee, Operating Lease, Liability, Payments, Due Year Four	66
Lessee, Operating Lease, Liability, Payments, Due Year Five	50
Lessee, Operating Lease, Liability, Payments, Due after Year Five	199
Lessee, Operating Lease, Liability, Payments, Due	685
Lessee, Operating Lease, Liability, Undiscounted Excess Amount	(116)
Operating Lease, Liability	569
Finance Lease, Liability, Payment, Due [Abstract]
Finance Lease, Liability, Payments, Due Next Twelve Months	81
Finance Lease, Liability, Payments, Due Year Two	74
Finance Lease, Liability, Payments, Due Year Three	63
Finance Lease, Liability, Payments, Due Year Four	63
Finance Lease, Liability, Payments, Due Year Five	62
Finance Lease, Liability, Payments, Due after Year Five	673
Finance Lease, Liability, Payment, Due	1,016
Finance Lease, Liability, Undiscounted Excess Amount	(502)
Finance Lease, Liability	514
Lease, Liability, Payments, Due Next Twelve Months	233
Lease, Liability, Payments, Due Year Two	199
Lease, Liability, Payments, Due Year Three	156
Lease, Liability, Payments, Due Year Five	112
Lease, Liability, Payments, Due Year Four	129
Lease, Liability, Payments, Due after Year Five	872
Lease, Liability, Undiscounted Excess Amount	(618)
Lease, Liability, Payments, Due	1,701
Total Lease Liabilities	1,083	$ 1,096
PacifiCorp [Member]
Lessee, Operating Lease, Liability, Payment, Due [Abstract]
Lessee, Operating Lease, Liability, Payments, Due Next Twelve Months	3
Lessee, Operating Lease, Liability, Payments, Due Year Two	2
Lessee, Operating Lease, Liability, Payments, Due Year Three	2
Lessee, Operating Lease, Liability, Payments, Due Year Four	1
Lessee, Operating Lease, Liability, Payments, Due Year Five	1
Lessee, Operating Lease, Liability, Payments, Due after Year Five	6
Lessee, Operating Lease, Liability, Payments, Due	15
Lessee, Operating Lease, Liability, Undiscounted Excess Amount	(4)
Operating Lease, Liability	11	12
Finance Lease, Liability, Payment, Due [Abstract]
Finance Lease, Liability, Payments, Due Next Twelve Months	7
Finance Lease, Liability, Payments, Due Year Two	3
Finance Lease, Liability, Payments, Due Year Three	2
Finance Lease, Liability, Payments, Due Year Four	2
Finance Lease, Liability, Payments, Due Year Five	2
Finance Lease, Liability, Payments, Due after Year Five	12
Finance Lease, Liability, Payment, Due	28
Finance Lease, Liability, Undiscounted Excess Amount	(11)
Finance Lease, Liability	17	19
Lease, Liability, Payments, Due Next Twelve Months	10
Lease, Liability, Payments, Due Year Two	5
Lease, Liability, Payments, Due Year Three	4
Lease, Liability, Payments, Due Year Five	3
Lease, Liability, Payments, Due Year Four	3
Lease, Liability, Payments, Due after Year Five	18
Lease, Liability, Undiscounted Excess Amount	(15)
Lease, Liability, Payments, Due	43
Total Lease Liabilities	$ 28	$ 31

Leases - NPC - Summary (Details

Leases - NPC - Summary (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Lessee, Lease, Description [Line Items]
Operating Lease, Right-of-Use Asset	$ 517	$ 525
Finance Lease, Right-of-Use Asset	501	504
Total Right-of-Use Asset	1,018	1,029
Operating Lease, Liability	569
Finance Lease, Liability	514
Total Lease Liabilities	1,083	1,096
Nevada Power Company [Member]
Lessee, Lease, Description [Line Items]
Operating Lease, Right-of-Use Asset	12	13
Finance Lease, Right-of-Use Asset	351	441
Total Right-of-Use Asset	363	454
Operating Lease, Liability	15	17
Finance Lease, Liability	361	454
Total Lease Liabilities	$ 376	$ 471

Leases - NPC - Lease Costs (Det

Leases - NPC - Lease Costs (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Lessee, Lease, Description [Line Items]
Variable Lease, Cost	$ 592	$ 623
Operating	151	170
Amortization	18	16
Finance Lease, Interest Expense	40	41
Lease, Cost	$ 821	$ 857
Operating Lease, Weighted Average Remaining Lease Term	7 years 4 months 24 days	7 years 7 months 6 days
Finance Lease, Weighted Average Remaining Lease Term	27 years 6 months	28 years 9 months 18 days
Operating Lease, Weighted Average Discount Rate, Percent	4.50%	5.20%
Finance Lease, Weighted Average Discount Rate, Percent	8.50%	8.60%
Nevada Power Company [Member]
Lessee, Lease, Description [Line Items]
Variable Lease, Cost	$ 434	$ 434
Operating	3	3
Amortization	12	13
Finance Lease, Interest Expense	29	37
Lease, Cost	$ 478	$ 487
Operating Lease, Weighted Average Remaining Lease Term	6 years 6 months	7 years 6 months
Finance Lease, Weighted Average Remaining Lease Term	28 years 8 months 12 days	30 years 7 months 6 days
Operating Lease, Weighted Average Discount Rate, Percent	4.50%	4.50%
Finance Lease, Weighted Average Discount Rate, Percent	8.60%	8.70%

Leases - NPC - Other (Details)

Leases - NPC - Other (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Lessee, Lease, Description [Line Items]
Operating Lease, Payments	$ 152	$ 153
Finance Lease, Interest Payment on Liability	40	42
Finance Lease, Principal Payments	24	19
Operating cash flows from operating leases	83	82
Right-of-Use Asset Obtained in Exchange for Finance Lease Liability	19	14
Nevada Power Company [Member]
Lessee, Lease, Description [Line Items]
Operating Lease, Payments	3	3
Finance Lease, Interest Payment on Liability	34	37
Finance Lease, Principal Payments	15	14
Operating cash flows from operating leases	1	0
Right-of-Use Asset Obtained in Exchange for Finance Lease Liability	$ 9	$ 9

Leases - NPC - Maturity Table (

Leases - NPC - Maturity Table (Details) - USD ($) $ in Millions	4 Months Ended	8 Months Ended	12 Months Ended
	Dec. 31, 2020	Aug. 31, 2020	Dec. 31, 2020	Dec. 31, 2019
Lessee, Operating Lease, Liability, Payment, Due [Abstract]
Lessee, Operating Lease, Liability, Payments, Due Next Twelve Months	$ 152		$ 152
Lessee, Operating Lease, Liability, Payments, Due Year Two	125		125
Lessee, Operating Lease, Liability, Payments, Due Year Three	93		93
Lessee, Operating Lease, Liability, Payments, Due Year Four	66		66
Lessee, Operating Lease, Liability, Payments, Due Year Five	50		50
Lessee, Operating Lease, Liability, Payments, Due after Year Five	199		199
Lessee, Operating Lease, Liability, Payments, Due	685		685
Lessee, Operating Lease, Liability, Undiscounted Excess Amount	(116)		(116)
Operating Lease, Liability	569		569
Finance Lease, Liability, Payment, Due [Abstract]
Finance Lease, Liability, Payments, Due Next Twelve Months	81		81
Finance Lease, Liability, Payments, Due Year Two	74		74
Finance Lease, Liability, Payments, Due Year Three	63		63
Finance Lease, Liability, Payments, Due Year Four	63		63
Finance Lease, Liability, Payments, Due Year Five	62		62
Finance Lease, Liability, Payments, Due after Year Five	673		673
Finance Lease, Liability, Payment, Due	1,016		1,016
Finance Lease, Liability, Undiscounted Excess Amount	(502)		(502)
Finance Lease, Liability	514		514
Lease, Liability, Payments, Due Next Twelve Months	233		233
Lease, Liability, Payments, Due Year Two	199		199
Lease, Liability, Payments, Due Year Three	156		156
Lease, Liability, Payments, Due Year Four	129		129
Lease, Liability, Payments, Due Year Five	112		112
Lease, Liability, Payments, Due after Year Five	872		872
Lease, Liability, Payments, Due	1,701		1,701
Lease, Liability, Undiscounted Excess Amount	(618)		(618)
Total Lease Liabilities	1,083		1,083	$ 1,096
Nevada Power Company [Member]
Lessee, Operating Lease, Liability, Payment, Due [Abstract]
Lessee, Operating Lease, Liability, Payments, Due Next Twelve Months	3		3
Lessee, Operating Lease, Liability, Payments, Due Year Two	3		3
Lessee, Operating Lease, Liability, Payments, Due Year Three	2		2
Lessee, Operating Lease, Liability, Payments, Due Year Four	3		3
Lessee, Operating Lease, Liability, Payments, Due Year Five	3		3
Lessee, Operating Lease, Liability, Payments, Due after Year Five	4		4
Lessee, Operating Lease, Liability, Payments, Due	18		18
Lessee, Operating Lease, Liability, Undiscounted Excess Amount	(3)		(3)
Operating Lease, Liability	15		15	17
Finance Lease, Liability, Payment, Due [Abstract]
Finance Lease, Liability, Payments, Due Next Twelve Months	56		56
Finance Lease, Liability, Payments, Due Year Two	54		54
Finance Lease, Liability, Payments, Due Year Three	43		43
Finance Lease, Liability, Payments, Due Year Four	43		43
Finance Lease, Liability, Payments, Due Year Five	43		43
Finance Lease, Liability, Payments, Due after Year Five	491		491
Finance Lease, Liability, Payment, Due	730		730
Finance Lease, Liability, Undiscounted Excess Amount	(369)		(369)
Finance Lease, Liability	361		361	454
Lease, Liability, Payments, Due Next Twelve Months	59		59
Lease, Liability, Payments, Due Year Two	57		57
Lease, Liability, Payments, Due Year Three	45		45
Lease, Liability, Payments, Due Year Four	46		46
Lease, Liability, Payments, Due Year Five	46		46
Lease, Liability, Payments, Due after Year Five	495		495
Lease, Liability, Payments, Due	748		748
Lease, Liability, Undiscounted Excess Amount	(372)		(372)
Total Lease Liabilities	376		$ 376	471
Remaining Share Transmission Line Project			75.00%
ON Line Financing Lease Obligation	295		$ 295	385
Sierra Pacific Power Company [Member]
Lessee, Operating Lease, Liability, Payment, Due [Abstract]
Lessee, Operating Lease, Liability, Payments, Due Next Twelve Months	2		2
Lessee, Operating Lease, Liability, Payments, Due Year Two	1		1
Lessee, Operating Lease, Liability, Payments, Due Year Three	1		1
Lessee, Operating Lease, Liability, Payments, Due Year Four	1		1
Lessee, Operating Lease, Liability, Payments, Due Year Five	1		1
Lessee, Operating Lease, Liability, Payments, Due after Year Five	25		25
Lessee, Operating Lease, Liability, Payments, Due	31		31
Lessee, Operating Lease, Liability, Undiscounted Excess Amount	(15)		(15)
Operating Lease, Liability	16		16	17
Finance Lease, Liability, Payment, Due [Abstract]
Finance Lease, Liability, Payments, Due Next Twelve Months	17		17
Finance Lease, Liability, Payments, Due Year Two	17		17
Finance Lease, Liability, Payments, Due Year Three	17		17
Finance Lease, Liability, Payments, Due Year Four	16		16
Finance Lease, Liability, Payments, Due Year Five	16		16
Finance Lease, Liability, Payments, Due after Year Five	170		170
Finance Lease, Liability, Payment, Due	253		253
Finance Lease, Liability, Undiscounted Excess Amount	(123)		(123)
Finance Lease, Liability	130		130	45
Lease, Liability, Payments, Due Next Twelve Months	19		19
Lease, Liability, Payments, Due Year Two	18		18
Lease, Liability, Payments, Due Year Three	18		18
Lease, Liability, Payments, Due Year Four	17		17
Lease, Liability, Payments, Due Year Five	17		17
Lease, Liability, Payments, Due after Year Five	195		195
Lease, Liability, Payments, Due	284		284
Lease, Liability, Undiscounted Excess Amount	(138)		(138)
Total Lease Liabilities	146		$ 146	62
Remaining Share Transmission Line Project			75.00%
ON Line Financing Lease Obligation	$ 122		$ 122	$ 35
ON Line deferrals | Nevada Power Company [Member]
Finance Lease, Liability, Payment, Due [Abstract]
Utilities Aggregate Share Transmission Line Project	75.00%	95.00%	25.00%
Lessee, Finance Lease, Term of Contract	41 years		41 years
ON Line deferrals | Sierra Pacific Power Company [Member]
Finance Lease, Liability, Payment, Due [Abstract]
Utilities Aggregate Share Transmission Line Project	25.00%	5.00%	25.00%
Lessee, Finance Lease, Term of Contract	41 years		41 years

Leases - SPPC - Summary (Detail

Leases - SPPC - Summary (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Lessee, Lease, Description [Line Items]
Operating Lease, Right-of-Use Asset	$ 517	$ 525
Finance Lease, Right-of-Use Asset	501	504
Total Right-of-Use Asset	1,018	1,029
Operating Lease, Liability	569
Finance Lease, Liability	514
Total Lease Liabilities	1,083	1,096
Sierra Pacific Power Company [Member]
Lessee, Lease, Description [Line Items]
Operating Lease, Right-of-Use Asset	16	17
Finance Lease, Right-of-Use Asset	126	43
Total Right-of-Use Asset	142	60
Operating Lease, Liability	16	17
Finance Lease, Liability	130	45
Total Lease Liabilities	$ 146	$ 62

Leases - SPPC - Lease Costs (De

Leases - SPPC - Lease Costs (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Lessee, Lease, Description [Line Items]
Variable Lease, Cost	$ 592	$ 623
Operating	151	170
Amortization	18	16
Finance Lease, Interest Expense	40	41
Lease, Cost	$ 821	$ 857
Operating Lease, Weighted Average Remaining Lease Term	7 years 4 months 24 days	7 years 7 months 6 days
Finance Lease, Weighted Average Remaining Lease Term	27 years 6 months	28 years 9 months 18 days
Operating Lease, Weighted Average Discount Rate, Percent	4.50%	5.20%
Finance Lease, Weighted Average Discount Rate, Percent	8.50%	8.60%
Sierra Pacific Power Company [Member]
Lessee, Lease, Description [Line Items]
Variable Lease, Cost	$ 78	$ 69
Operating	2	1
Amortization	4	2
Finance Lease, Interest Expense	9	2
Lease, Cost	$ 93	$ 74
Operating Lease, Weighted Average Remaining Lease Term	27 years 2 months 12 days	26 years 3 months 18 days
Finance Lease, Weighted Average Remaining Lease Term	27 years 9 months 18 days	20 years 10 months 24 days
Operating Lease, Weighted Average Discount Rate, Percent	5.00%	5.00%
Finance Lease, Weighted Average Discount Rate, Percent	8.10%	7.10%

Leases - SPPC - Other (Details)

Leases - SPPC - Other (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Lessee, Lease, Description [Line Items]
Operating Lease, Payments	$ (152)	$ (153)
Finance Lease, Interest Payment on Liability	(40)	(42)
Finance Lease, Principal Payments	(24)	(19)
Right-of-Use Asset Obtained in Exchange for Finance Lease Liability	19	14
Sierra Pacific Power Company [Member]
Lessee, Lease, Description [Line Items]
Operating Lease, Payments	(2)	(3)
Finance Lease, Interest Payment on Liability	(6)	(3)
Finance Lease, Principal Payments	(5)	(3)
Right-of-Use Asset Obtained in Exchange for Finance Lease Liability	$ 89	$ 5

Leases - SPPC - Maturity Table

Leases - SPPC - Maturity Table (Details) - USD ($) $ in Millions	4 Months Ended	8 Months Ended	12 Months Ended
	Dec. 31, 2020	Aug. 31, 2020	Dec. 31, 2020	Dec. 31, 2019
Lessee, Operating Lease, Liability, Payment, Due [Abstract]
Lessee, Operating Lease, Liability, Payments, Due Next Twelve Months	$ 152		$ 152
Lessee, Operating Lease, Liability, Payments, Due Year Two	125		125
Lessee, Operating Lease, Liability, Payments, Due Year Three	93		93
Lessee, Operating Lease, Liability, Payments, Due Year Four	66		66
Lessee, Operating Lease, Liability, Payments, Due Year Five	50		50
Lessee, Operating Lease, Liability, Payments, Due after Year Five	199		199
Lessee, Operating Lease, Liability, Payments, Due	685		685
Lessee, Operating Lease, Liability, Undiscounted Excess Amount	(116)		(116)
Operating Lease, Liability	569		569
Finance Lease, Liability, Payment, Due [Abstract]
Finance Lease, Liability, Payments, Due Next Twelve Months	81		81
Finance Lease, Liability, Payments, Due Year Two	74		74
Finance Lease, Liability, Payments, Due Year Three	63		63
Finance Lease, Liability, Payments, Due Year Four	63		63
Finance Lease, Liability, Payments, Due Year Five	62		62
Finance Lease, Liability, Payments, Due after Year Five	673		673
Finance Lease, Liability, Payment, Due	1,016		1,016
Finance Lease, Liability, Undiscounted Excess Amount	(502)		(502)
Finance Lease, Liability	514		514
Lease, Liability, Payments, Due Next Twelve Months	233		233
Lease, Liability, Payments, Due Year Two	199		199
Lease, Liability, Payments, Due Year Three	156		156
Lease, Liability, Payments, Due Year Four	129		129
Lease, Liability, Payments, Due Year Five	112		112
Lease, Liability, Payments, Due after Year Five	872		872
Lease, Liability, Payments, Due	1,701		1,701
Lease, Liability, Undiscounted Excess Amount	(618)		(618)
Total Lease Liabilities	1,083		1,083	$ 1,096
Sierra Pacific Power Company [Member]
Lessee, Operating Lease, Liability, Payment, Due [Abstract]
Lessee, Operating Lease, Liability, Payments, Due Next Twelve Months	2		2
Lessee, Operating Lease, Liability, Payments, Due Year Two	1		1
Lessee, Operating Lease, Liability, Payments, Due Year Three	1		1
Lessee, Operating Lease, Liability, Payments, Due Year Four	1		1
Lessee, Operating Lease, Liability, Payments, Due Year Five	1		1
Lessee, Operating Lease, Liability, Payments, Due after Year Five	25		25
Lessee, Operating Lease, Liability, Payments, Due	31		31
Lessee, Operating Lease, Liability, Undiscounted Excess Amount	(15)		(15)
Operating Lease, Liability	16		16	17
Finance Lease, Liability, Payment, Due [Abstract]
Finance Lease, Liability, Payments, Due Next Twelve Months	17		17
Finance Lease, Liability, Payments, Due Year Two	17		17
Finance Lease, Liability, Payments, Due Year Three	17		17
Finance Lease, Liability, Payments, Due Year Four	16		16
Finance Lease, Liability, Payments, Due Year Five	16		16
Finance Lease, Liability, Payments, Due after Year Five	170		170
Finance Lease, Liability, Payment, Due	253		253
Finance Lease, Liability, Undiscounted Excess Amount	(123)		(123)
Finance Lease, Liability	130		130	45
Lease, Liability, Payments, Due Next Twelve Months	19		19
Lease, Liability, Payments, Due Year Two	18		18
Lease, Liability, Payments, Due Year Three	18		18
Lease, Liability, Payments, Due Year Four	17		17
Lease, Liability, Payments, Due Year Five	17		17
Lease, Liability, Payments, Due after Year Five	195		195
Lease, Liability, Payments, Due	284		284
Lease, Liability, Undiscounted Excess Amount	(138)		(138)
Total Lease Liabilities	146		$ 146	62
Remaining Share Transmission Line Project			75.00%
ON Line Financing Lease Obligation	122		$ 122	35
Nevada Power Company [Member]
Lessee, Operating Lease, Liability, Payment, Due [Abstract]
Lessee, Operating Lease, Liability, Payments, Due Next Twelve Months	3		3
Lessee, Operating Lease, Liability, Payments, Due Year Two	3		3
Lessee, Operating Lease, Liability, Payments, Due Year Three	2		2
Lessee, Operating Lease, Liability, Payments, Due Year Four	3		3
Lessee, Operating Lease, Liability, Payments, Due Year Five	3		3
Lessee, Operating Lease, Liability, Payments, Due after Year Five	4		4
Lessee, Operating Lease, Liability, Payments, Due	18		18
Lessee, Operating Lease, Liability, Undiscounted Excess Amount	(3)		(3)
Operating Lease, Liability	15		15	17
Finance Lease, Liability, Payment, Due [Abstract]
Finance Lease, Liability, Payments, Due Next Twelve Months	56		56
Finance Lease, Liability, Payments, Due Year Two	54		54
Finance Lease, Liability, Payments, Due Year Three	43		43
Finance Lease, Liability, Payments, Due Year Four	43		43
Finance Lease, Liability, Payments, Due Year Five	43		43
Finance Lease, Liability, Payments, Due after Year Five	491		491
Finance Lease, Liability, Payment, Due	730		730
Finance Lease, Liability, Undiscounted Excess Amount	(369)		(369)
Finance Lease, Liability	361		361	454
Lease, Liability, Payments, Due Next Twelve Months	59		59
Lease, Liability, Payments, Due Year Two	57		57
Lease, Liability, Payments, Due Year Three	45		45
Lease, Liability, Payments, Due Year Four	46		46
Lease, Liability, Payments, Due Year Five	46		46
Lease, Liability, Payments, Due after Year Five	495		495
Lease, Liability, Payments, Due	748		748
Lease, Liability, Undiscounted Excess Amount	(372)		(372)
Total Lease Liabilities	376		$ 376	471
Remaining Share Transmission Line Project			75.00%
ON Line Financing Lease Obligation	$ 295		$ 295	$ 385
ON Line deferrals | Sierra Pacific Power Company [Member]
Finance Lease, Liability, Payment, Due [Abstract]
Utilities Aggregate Share Transmission Line Project	25.00%	5.00%	25.00%
Lessee, Finance Lease, Term of Contract	41 years		41 years
ON Line deferrals | Nevada Power Company [Member]
Finance Lease, Liability, Payment, Due [Abstract]
Utilities Aggregate Share Transmission Line Project	75.00%	95.00%	25.00%
Lessee, Finance Lease, Term of Contract	41 years		41 years

Leases - EEGH - Summary (Detail

Leases - EEGH - Summary (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Lessee, Lease, Description [Line Items]
Operating Lease, Right-of-Use Asset	$ 517	$ 525
Finance Lease, Right-of-Use Asset	501	504
Total Right-of-Use Asset	1,018	1,029
Operating Lease, Liability	569
Finance Lease, Liability	514
Total Lease Liabilities	1,083	1,096
Eastern Energy Gas Holdings, LLC [Member]
Lessee, Lease, Description [Line Items]
Operating Lease, Right-of-Use Asset	31	37
Finance Lease, Right-of-Use Asset	8	6
Total Right-of-Use Asset	39	43
Operating Lease, Liability	29	35
Finance Lease, Liability	6	6
Total Lease Liabilities	$ 35	$ 41

Leases - EEGH - Lease Costs (De

Leases - EEGH - Lease Costs (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Lessee, Lease, Description [Line Items]
Operating	$ 151	$ 170
Finance:
Amortization	18	16
Short-term	20	7
Lease, Cost	$ 821	$ 857
Operating Lease, Weighted Average Remaining Lease Term	7 years 4 months 24 days	7 years 7 months 6 days
Finance Lease, Weighted Average Remaining Lease Term	27 years 6 months	28 years 9 months 18 days
Operating Lease, Weighted Average Discount Rate, Percent	4.50%	5.20%
Finance Lease, Weighted Average Discount Rate, Percent	8.50%	8.60%
Eastern Energy Gas Holdings, LLC [Member]
Lessee, Lease, Description [Line Items]
Operating	$ 7	$ 7
Finance:
Short-term	5	7
Lease, Cost	$ 12	$ 14
Operating Lease, Weighted Average Remaining Lease Term	11 years 6 months	11 years 2 months 12 days
Finance Lease, Weighted Average Remaining Lease Term	4 years 8 months 12 days	5 years 7 months 6 days
Operating Lease, Weighted Average Discount Rate, Percent	4.40%	4.40%
Finance Lease, Weighted Average Discount Rate, Percent	2.60%	4.10%

Leases - EEGH - Supplemental Ca

Leases - EEGH - Supplemental Cash Flow (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Lessee, Lease, Description [Line Items]
Operating Lease, Payments	$ 152	$ 153
Eastern Energy Gas Holdings, LLC [Member]
Lessee, Lease, Description [Line Items]
Operating Lease, Payments	$ 12	$ 14

Leases - EEGH - Maturity Table

Leases - EEGH - Maturity Table (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Lessee, Operating Lease, Liability, Payment, Due [Abstract]
Lessee, Operating Lease, Liability, Payments, Due Next Twelve Months	$ 152
Lessee, Operating Lease, Liability, Payments, Due Year Two	125
Lessee, Operating Lease, Liability, Payments, Due Year Three	93
Lessee, Operating Lease, Liability, Payments, Due Year Four	66
Lessee, Operating Lease, Liability, Payments, Due Year Five	50
Lessee, Operating Lease, Liability, Payments, Due after Year Five	199
Lessee, Operating Lease, Liability, Payments, Due	685
Lessee, Operating Lease, Liability, Undiscounted Excess Amount	(116)
Operating Lease, Liability	569
Finance Lease, Liability, Payment, Due [Abstract]
Finance Lease, Liability, Payments, Due Next Twelve Months	81
Finance Lease, Liability, Payments, Due Year Two	74
Finance Lease, Liability, Payments, Due Year Three	63
Finance Lease, Liability, Payments, Due Year Four	63
Finance Lease, Liability, Payments, Due Year Five	62
Finance Lease, Liability, Payments, Due after Year Five	673
Finance Lease, Liability, Payment, Due	1,016
Finance Lease, Liability, Undiscounted Excess Amount	(502)
Finance Lease, Liability	514
Lease, Liability, Payments, Due Next Twelve Months	233
Lease, Liability, Payments, Due Year Two	199
Lease, Liability, Payments, Due Year Three	156
Lease, Liability, Payments, Due Year Four	129
Lease, Liability, Payments, Due Year Five	112
Lease, Liability, Payments, Due after Year Five	872
Lease, Liability, Payments, Due	1,701
Lease, Liability, Undiscounted Excess Amount	(618)
Total Lease Liabilities	1,083	$ 1,096
Eastern Energy Gas Holdings, LLC [Member]
Lessee, Operating Lease, Liability, Payment, Due [Abstract]
Lessee, Operating Lease, Liability, Payments, Due Next Twelve Months	6
Lessee, Operating Lease, Liability, Payments, Due Year Two	5
Lessee, Operating Lease, Liability, Payments, Due Year Three	4
Lessee, Operating Lease, Liability, Payments, Due Year Four	2
Lessee, Operating Lease, Liability, Payments, Due Year Five	2
Lessee, Operating Lease, Liability, Payments, Due after Year Five	19
Lessee, Operating Lease, Liability, Payments, Due	38
Lessee, Operating Lease, Liability, Undiscounted Excess Amount	(9)
Operating Lease, Liability	29	35
Finance Lease, Liability, Payment, Due [Abstract]
Finance Lease, Liability, Payments, Due Next Twelve Months	2
Finance Lease, Liability, Payments, Due Year Two	2
Finance Lease, Liability, Payments, Due Year Three	1
Finance Lease, Liability, Payments, Due Year Four	1
Finance Lease, Liability, Payments, Due Year Five	1
Finance Lease, Liability, Payments, Due after Year Five	0
Finance Lease, Liability, Payment, Due	7
Finance Lease, Liability, Undiscounted Excess Amount	(1)
Finance Lease, Liability	6	6
Lease, Liability, Payments, Due Next Twelve Months	8
Lease, Liability, Payments, Due Year Two	7
Lease, Liability, Payments, Due Year Three	5
Lease, Liability, Payments, Due Year Four	3
Lease, Liability, Payments, Due Year Five	3
Lease, Liability, Payments, Due after Year Five	19
Lease, Liability, Payments, Due	45
Lease, Liability, Undiscounted Excess Amount	(10)
Total Lease Liabilities	$ 35	$ 41

Regulatory Matters - Regulatory

Regulatory Matters - Regulatory Assets (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2020		Dec. 31, 2019
Regulatory Assets [Line Items]
Regulatory Assets, Current		$ 283		$ 115
Regulatory assets, noncurrent		3,157		2,766
Total regulatory assets		3,440		2,881
Remaining Amounts of Regulatory Assets for which No Return on Investment During Recovery Period is Provided		1,600		1,400
Deferred Income Tax Charge [Member]
Regulatory Assets [Line Items]
Total regulatory assets		283	[1]	223
Employee benefit plans [Member]
Regulatory Assets [Line Items]
Total regulatory assets	[2]	$ 722		667
Regulatory asset amortization period years		15
Asset disposition costs [Member]
Regulatory Assets [Line Items]
Total regulatory assets		$ 347		391
Deferred net power costs [Member]
Regulatory Assets [Line Items]
Total regulatory assets		$ 139		110
Regulatory asset amortization period years		1 year
Asset Retirement Obligation Costs
Regulatory Assets [Line Items]
Total regulatory assets		$ 640		445
Regulatory asset amortization period years		13 years
Deferred Operating Costs
Regulatory Assets [Line Items]
Total regulatory assets		$ 124		134
Regulatory asset amortization period years		11 years
Regulatory assets other [Member]
Regulatory Assets [Line Items]
Total regulatory assets		$ 988		902
us-gaap_demandsidemanagement
Regulatory Assets [Line Items]
Total regulatory assets		$ 197		$ 9
Regulatory asset amortization period years		10 years
[1]	Amounts primarily represent income tax benefits related to certain property-related basis differences and other various differences that were previously passed on to customers and will be included in regulated rates when the temporary differences reverse.
[2]	Represents amounts not yet recognized as a component of net periodic benefit cost that are expected to be included in regulated rates when recognized.

Regulatory Matters - Regulato_2

Regulatory Matters - Regulatory Liabilities (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Regulatory Liabilities [Line Items]
Federal statutory income tax rate		21.00%	21.00%	21.00%	35.00%
Regulatory Liability, Current		$ 254	$ 211
Regulatory liabilities, noncurrent		7,221	7,100
Regulatory Liabilities		7,475	7,311
Deferred Income Tax Charge [Member]
Regulatory Liabilities [Line Items]
Regulatory Liabilities	[1]	3,600	3,611
Cost of removal
Regulatory Liabilities [Line Items]
Regulatory Liabilities	[2]	$ 2,435	2,370
Regulatory liability amortization period years		26 years
Asset Retirement Obligation Costs
Regulatory Liabilities [Line Items]
Regulatory Liabilities		$ 305	241
Regulatory liability amortization period years		31 years
Levelized depreciation [Member]
Regulatory Liabilities [Line Items]
Regulatory Liabilities		$ 281	304
Regulatory liability amortization period years		29 years
Other
Regulatory Liabilities [Line Items]
Regulatory Liabilities		$ 854	$ 785
Tax Cuts and Jobs Act of 2017 [Member]
Regulatory Liabilities [Line Items]
Federal statutory income tax rate					21.00%
[1]	Amounts primarily represent income tax liabilities related to the federal tax rate change from 35% to 21% that are probable to be passed on to customers, offset by income tax benefits related to certain property-related basis differences and other various differences that were previously passed on to customers and will be included in regulated rates when the temporary differences reverse.
[2]	Amounts represent estimated costs, as accrued through depreciation rates and exclusive of ARO liabilities, of removing regulated property, plant and equipment in accordance with accepted regulatory practices. Amounts are deducted from rate base or otherwise accrue a carrying cost.

Regulatory Matters - PacifiCorp

Regulatory Matters - PacifiCorp - Regulatory Assets (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2020		Dec. 31, 2019
Regulatory Assets [Line Items]
Regulatory Assets, Current		$ 283		$ 115
Regulatory assets, noncurrent		3,157		2,766
Regulatory Assets		3,440		2,881
Remaining Amounts of Regulatory Assets for which No Return on Investment During Recovery Period is Provided		1,600		1,400
Deferred Income Tax Charge [Member]
Regulatory Assets [Line Items]
Regulatory Assets		283	[1]	223
Employee benefit plans [Member]
Regulatory Assets [Line Items]
Regulatory Assets	[2]	$ 722		667
Regulatory asset amortization period years		15
Deferred net power costs [Member]
Regulatory Assets [Line Items]
Regulatory Assets		$ 139		110
Regulatory asset amortization period years		1 year
Asset Retirement Obligation Costs
Regulatory Assets [Line Items]
Regulatory Assets		$ 640		445
Regulatory asset amortization period years		13 years
us-gaap_demandsidemanagement
Regulatory Assets [Line Items]
Regulatory Assets		$ 197		9
Regulatory asset amortization period years		10 years
PacifiCorp [Member]
Regulatory Assets [Line Items]
Regulatory Assets, Current		$ 116		63
Regulatory assets, noncurrent		1,279		1,060
Regulatory Assets		1,395		1,123
Remaining Amounts of Regulatory Assets for which No Return on Investment During Recovery Period is Provided		707		609
PacifiCorp [Member] | DSM Regulatory Assets
Regulatory Assets [Line Items]
Amounts Billed to Customers, Used to Accelerate Depreciation		185
PacifiCorp [Member] | Employee benefit plans [Member]
Regulatory Assets [Line Items]
Regulatory Assets	[3]	$ 432		422
Regulatory asset amortization period years	[3]	20 years
PacifiCorp [Member] | Utah mine disposition [Member]
Regulatory Assets [Line Items]
Regulatory Assets	[4]	$ 117		125
Regulatory asset amortization period years	[4]	Various
PacifiCorp [Member] | Unamortized contract values [Member]
Regulatory Assets [Line Items]
Regulatory Assets		$ 42		60
Regulatory asset amortization period years		3 years
PacifiCorp [Member] | Deferred net power costs [Member]
Regulatory Assets [Line Items]
Regulatory Assets		$ 78		106
Regulatory asset amortization period years		1 year
PacifiCorp [Member] | Unrealized loss on regulated derivative contracts [Member]
Regulatory Assets [Line Items]
Regulatory Assets		$ 17		62
Regulatory asset amortization period years		2 years
PacifiCorp [Member] | Asset Retirement Obligation Costs
Regulatory Assets [Line Items]
Regulatory Assets		$ 252		140
Regulatory asset amortization period years		24 years
PacifiCorp [Member] | Other
Regulatory Assets [Line Items]
Regulatory Assets		$ 261		200
Regulatory asset amortization period years		Various
PacifiCorp [Member] | us-gaap_demandsidemanagement
Regulatory Assets [Line Items]
Regulatory Assets	[5]	$ 196		$ 8
Regulatory asset amortization period years		10 years
[1]	Amounts primarily represent income tax benefits related to certain property-related basis differences and other various differences that were previously passed on to customers and will be included in regulated rates when the temporary differences reverse.
[2]	Represents amounts not yet recognized as a component of net periodic benefit cost that are expected to be included in regulated rates when recognized.
[3]	Represents amounts not yet recognized as a component of net periodic benefit cost that are expected to be included in rates when recognized.
[4]	Amounts represent regulatory assets established as a result of the Utah mine disposition in 2015 for the United Mine Workers of America ("UMWA") 1974 Pension Plan withdrawal and closure costs incurred to date considered probable of recovery. (3) At December 31, 2019, DSM regulatory assets were substantially offset by amounts billed to Utah retail customers under the related Utah STEP program. In accordance with the Utah general rate case order issued in December 2020, $185 million of amounts billed to Utah customers under the Utah STEP program were used to accelerate depreciation of certain coal-fueled generation units as discussed in Note 3.
[5]	At December 31, 2019, DSM regulatory assets were substantially offset by amounts billed to Utah retail customers under the related Utah STEP program. In accordance with the Utah general rate case order issued in December 2020, $185 million of amounts billed to Utah customers under the Utah STEP program were used to accelerate depreciation of certain coal-fueled generation units as discussed in Note 3.

Regulatory Matters - PacifiCo_2

Regulatory Matters - PacifiCorp - Regulatory Liabilities (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Regulatory Liabilities [Line Items]
Federal statutory income tax rate		21.00%	21.00%	21.00%	35.00%
Regulatory Liability, Current		$ 254	$ 211
Regulatory liabilities, noncurrent		7,221	7,100
Regulatory Liabilities		7,475	7,311
Cost of removal
Regulatory Liabilities [Line Items]
Regulatory Liabilities	[1]	$ 2,435	2,370
Regulatory liability amortization period years		26 years
Deferred Income Tax Charge [Member]
Regulatory Liabilities [Line Items]
Regulatory Liabilities	[2]	$ 3,600	$ 3,611
PacifiCorp [Member]
Regulatory Liabilities [Line Items]
Federal statutory income tax rate		21.00%	21.00%	21.00%	35.00%
Regulatory Liability, Current		$ 115	$ 56
Regulatory liabilities, noncurrent		2,727	2,913
Regulatory Liabilities		2,842	2,969
PacifiCorp [Member] | Cost of removal
Regulatory Liabilities [Line Items]
Regulatory liabilities, noncurrent		1,125	1,019
Regulatory Liabilities	[3]	$ 1,125	1,019
Regulatory liability amortization period years	[3]	26 years
PacifiCorp [Member] | Deferred Income Tax Charge [Member]
Regulatory Liabilities [Line Items]
Regulatory Liabilities	[4]	$ 1,463	1,653
Regulatory liability amortization period years	[4]	Various
PacifiCorp [Member] | Other
Regulatory Liabilities [Line Items]
Regulatory Liabilities		$ 254	$ 297
Regulatory liability amortization period years		Various
Tax Cuts and Jobs Act of 2017 [Member]
Regulatory Liabilities [Line Items]
Federal statutory income tax rate					21.00%
[1]	Amounts represent estimated costs, as accrued through depreciation rates and exclusive of ARO liabilities, of removing regulated property, plant and equipment in accordance with accepted regulatory practices. Amounts are deducted from rate base or otherwise accrue a carrying cost.
[2]	Amounts primarily represent income tax liabilities related to the federal tax rate change from 35% to 21% that are probable to be passed on to customers, offset by income tax benefits related to certain property-related basis differences and other various differences that were previously passed on to customers and will be included in regulated rates when the temporary differences reverse.
[3]	Amounts represent estimated costs, as accrued through depreciation rates, of removing property, plant and equipment in accordance with accepted regulatory practices. Amounts are deducted from rate base or otherwise accrue a carrying cost.
[4]	Amounts primarily represent income tax liabilities related to the federal tax rate change from 35% to 21% that are probable of being passed on to customers, offset by income tax benefits related to certain property-related basis differences and other various differences that were previously passed on to customers and will be included in regulated rates when the temporary differences reverse.

Regulatory Matters - MEC - Regu

Regulatory Matters - MEC - Regulatory Assets (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019
Regulatory Assets [Line Items]
Regulatory Assets, Noncurrent		$ 3,157	$ 2,766
Remaining Amounts of Regulatory Assets for which No Return on Investment During Recovery Period is Provided		$ 1,600	1,400
Asset Retirement Obligation Costs
Regulatory Assets [Line Items]
Regulatory asset amortization period years		13 years
Employee benefit plans [Member]
Regulatory Assets [Line Items]
Regulatory asset amortization period years		15
MidAmerican Energy Company [Member]
Regulatory Assets [Line Items]
Regulatory Assets, Noncurrent		$ 392	289
Remaining Amounts of Regulatory Assets for which No Return on Investment During Recovery Period is Provided		$ 389	286
MidAmerican Energy Company [Member] | Asset Retirement Obligation Costs
Regulatory Assets [Line Items]
Regulatory Asset, Amortization Period	[1]	6 years
Regulatory Assets, Noncurrent	[1]	$ 298	223
MidAmerican Energy Company [Member] | Employee benefit plans [Member]
Regulatory Assets [Line Items]
Regulatory Asset, Amortization Period	[2]	15 years
Regulatory Assets, Noncurrent	[2]	$ 66	26
MidAmerican Energy Company [Member] | Unrealized loss on regulated derivative contracts [Member]
Regulatory Assets [Line Items]
Regulatory Asset, Amortization Period		1 year
Regulatory Assets, Noncurrent		$ 0	7
MidAmerican Energy Company [Member] | Other
Regulatory Assets [Line Items]
Regulatory Assets, Noncurrent		$ 28	$ 33
[1]	Amount predominantly relates to AROs for fossil-fueled and wind-powered generating facilities. Refer to Note 11 for a discussion of AROs.
[2]	Represents amounts not yet recognized as a component of net periodic benefit cost that are expected to be included in regulated rates when recognized.

Regulatory Matters - MEC - Re_2

Regulatory Matters - MEC - Regulatory Liabilities (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Regulatory Liabilities [Line Items]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent		21.00%	21.00%	21.00%	35.00%
Regulatory Liability, Noncurrent		$ 7,221	$ 7,100
Tax Cuts and Jobs Act of 2017 [Member]
Regulatory Liabilities [Line Items]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent					21.00%
MidAmerican Energy Company [Member]
Regulatory Liabilities [Line Items]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent		21.00%	21.00%	21.00%	35.00%
Regulatory Liability, Noncurrent		$ 1,111	$ 1,406
MidAmerican Energy Company [Member] | Cost of removal
Regulatory Liabilities [Line Items]
Regulatory Liability, Amortization Period		29 years
Regulatory Liability, Noncurrent	[1]	$ 466	572
MidAmerican Energy Company [Member] | Deferred Income Tax Charge [Member]
Regulatory Liabilities [Line Items]
Regulatory Liability, Noncurrent	[2]	$ 263	478
MidAmerican Energy Company [Member] | Asset Retirement Obligation Costs
Regulatory Liabilities [Line Items]
Regulatory Liability, Amortization Period		32 years
Regulatory Liability, Noncurrent	[3]	$ 300	241
MidAmerican Energy Company [Member] | Pension and other postretirement costs [Member]
Regulatory Liabilities [Line Items]
Regulatory Liability, Amortization Period		9 years
Regulatory Liability, Noncurrent	[4]	$ 20	32
MidAmerican Energy Company [Member] | Transmission MVP CWIP Return [Member]
Regulatory Liabilities [Line Items]
Regulatory Liability, Amortization Period		52 years
Regulatory Liability, Noncurrent	[5]	$ 35	35
MidAmerican Energy Company [Member] | Regulatory revenue sharing arrangement [Member]
Regulatory Liabilities [Line Items]
Regulatory Liability, Amortization Period		1 year
Regulatory Liability, Noncurrent	[6]	$ 0	22
MidAmerican Energy Company [Member] | Other
Regulatory Liabilities [Line Items]
Regulatory Liability, Noncurrent		$ 27	$ 26
MidAmerican Energy Company [Member] | Tax Cuts and Jobs Act of 2017 [Member]
Regulatory Liabilities [Line Items]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent				21.00%
[1]	Amounts represent estimated costs, as accrued through depreciation rates and exclusive of ARO liabilities, of removing utility plant in accordance with accepted regulatory practices. Amounts are deducted from rate base or otherwise accrue a carrying cost.
[2]	Amounts primarily represent income tax liabilities primarily related to the federal tax rate change from 35% to 21% that are probable to be passed on to customers, offset by income tax benefits related to state accelerated tax depreciation and certain property-related basis differences that were previously passed on to customers and will be included in regulated rates when the temporary differences reverse.
[3]	Amount represents the excess of nuclear decommission trust assets over the related ARO. Refer to Note 11 for a discussion of AROs.
[4]	Represents amounts not yet recognized as a component of net periodic benefit cost that are to be returned to customers in future periods when recognized
[5]	Represents AFUDC accrued on transmission MVPs that is deducted from rate base as a result of the inclusion of related construction work-in-progress in rate base.
[6]	Represents current-year accruals under a regulatory arrangement in Iowa in which equity returns exceeding specified thresholds reduce utility plant upon final determination.

Regulatory Matters - NPC - Regu

Regulatory Matters - NPC - Regulatory Assets (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019
Regulatory Assets [Line Items]
Regulatory Assets		$ 3,440	$ 2,881
Regulatory Assets, Current		283	115
Regulatory Assets, Noncurrent		3,157	2,766
Remaining Amounts of Regulatory Assets for which No Return on Investment During Recovery Period is Provided		1,600	1,400
Deferred Operating Costs
Regulatory Assets [Line Items]
Regulatory Assets		124	134
Asset Retirement Obligation Costs
Regulatory Assets [Line Items]
Regulatory Assets		640	445
Nevada Power Company [Member]
Regulatory Assets [Line Items]
Regulatory Assets		794	801
Regulatory Assets, Current		48	1
Regulatory Assets, Noncurrent		746	800
Remaining Amounts of Regulatory Assets for which No Return on Investment During Recovery Period is Provided		$ 288	303
Nevada Power Company [Member] | Decommissioning costs
Regulatory Assets [Line Items]
Regulatory Asset, Amortization Period	[1]	3 years
Regulatory Assets	[1]	$ 230	241
Regulatory Assets, Amortization Period Unknown		$ 11	104
Nevada Power Company [Member] | Deferred Operating Costs
Regulatory Assets [Line Items]
Regulatory Asset, Amortization Period		9 years
Regulatory Assets		$ 119	136
Nevada Power Company [Member] | Merger costs from 1999 merger
Regulatory Assets [Line Items]
Regulatory Asset, Amortization Period		24 years
Regulatory Assets		$ 115	120
Nevada Power Company [Member] | Asset Retirement Obligation Costs
Regulatory Assets [Line Items]
Regulatory Asset, Amortization Period	[2]	6 years
Regulatory Assets	[2]	$ 70	67
Nevada Power Company [Member] | Employee benefit plans
Regulatory Assets [Line Items]
Regulatory Asset, Amortization Period		8 years
Regulatory Assets	[2]	$ 50	87
Nevada Power Company [Member] | Legacy Meters
Regulatory Assets [Line Items]
Regulatory Asset, Amortization Period		12 years
Regulatory Assets		$ 45	49
Nevada Power Company [Member] | ON Line deferrals
Regulatory Assets [Line Items]
Regulatory Asset, Amortization Period		33 years
Regulatory Assets		$ 43	45
Nevada Power Company [Member] | Deferred energy costs
Regulatory Assets [Line Items]
Regulatory Asset, Amortization Period		1 year
Regulatory Assets		$ 39	0
Nevada Power Company [Member] | Abandoned projects
Regulatory Assets [Line Items]
Regulatory Assets		0	12
Nevada Power Company [Member] | Other
Regulatory Assets [Line Items]
Regulatory Assets		$ 83	$ 44
[1]	Amount includes regulatory assets with an indeterminate life of $11 million and $104 million as of December 31, 2020 and 2019, respectively.
[2]	Represents amounts not yet recognized as a component of net periodic benefit cost that are expected to be included in regulated rates when recognized.

Regulatory Matters - NPC - Re_2

Regulatory Matters - NPC - Regulatory Liabilities (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Regulatory Liabilities [Line Items]
Regulatory Liabilities		$ 7,475	$ 7,311
Regulatory Liability, Current		254	211
Regulatory Liability, Noncurrent		$ 7,221	$ 7,100
Federal statutory income tax rate		21.00%	21.00%	21.00%	35.00%
Tax Cuts and Jobs Act of 2017 [Member]
Regulatory Liabilities [Line Items]
Federal statutory income tax rate					21.00%
Cost of removal
Regulatory Liabilities [Line Items]
Regulatory Liabilities	[1]	$ 2,435	$ 2,370
Other
Regulatory Liabilities [Line Items]
Regulatory Liabilities		854	785
Nevada Power Company [Member]
Regulatory Liabilities [Line Items]
Regulatory Liabilities		1,213	1,256
Regulatory Liability, Current		50	93
Regulatory Liability, Noncurrent		$ 1,163	$ 1,163
Federal statutory income tax rate		21.00%	21.00%	21.00%
Nevada Power Company [Member] | Tax Cuts and Jobs Act of 2017 [Member]
Regulatory Liabilities [Line Items]
Federal statutory income tax rate		21.00%			35.00%
Nevada Power Company [Member] | Deferred income taxes
Regulatory Liabilities [Line Items]
Regulatory Liabilities	[2]	$ 647	$ 681
Nevada Power Company [Member] | Cost of removal
Regulatory Liabilities [Line Items]
Regulatory Liability, Amortization Period	[3]	32 years
Regulatory Liabilities	[3]	$ 340	332
Nevada Power Company [Member] | Impact fees
Regulatory Liabilities [Line Items]
Regulatory Liability, Amortization Period	[4]	2 years
Regulatory Liabilities	[4]	$ 54	72
Nevada Power Company [Member] | Other
Regulatory Liabilities [Line Items]
Regulatory Liabilities		$ 172	$ 171
[1]	Amounts represent estimated costs, as accrued through depreciation rates and exclusive of ARO liabilities, of removing regulated property, plant and equipment in accordance with accepted regulatory practices. Amounts are deducted from rate base or otherwise accrue a carrying cost.
[2]	Amounts primarily represent income tax liabilities related to the federal tax rate change from 35% to 21% that are probable to be passed on to customers, offset by income tax benefits related to accelerated tax depreciation and certain property-related basis differences that were previously passed on to customers and will be included in regulated rates when the temporary differences reverse.
[3]	Amounts represent estimated costs, as accrued through depreciation rates and exclusive of ARO liabilities, of removing regulated property, plant and equipment in accordance with accepted regulatory practices.
[4]	Amounts reduce rate base or otherwise accrue a carrying cost.

Regulatory Matters - NPC - Othe

Regulatory Matters - NPC - Other (Details)		1 Months Ended		3 Months Ended	12 Months Ended
		Sep. 30, 2020USD ($)	Jun. 30, 2020USD ($)	Dec. 31, 2020USD ($)	Dec. 31, 2020USD ($)MW	Nov. 30, 2020USD ($)	Dec. 31, 2019USD ($)
Public Utilities, General Disclosures [Line Items]
Regulatory Assets, Noncurrent				$ 3,157,000,000	$ 3,157,000,000		$ 2,766,000,000
Nevada Power Company [Member]
Public Utilities, General Disclosures [Line Items]
Regulatory Assets, Noncurrent				$ 746,000,000	$ 746,000,000		800,000,000
Nevada Power Company [Member] | 255 Megawatts of Coal Energy [Member]
Public Utilities, General Disclosures [Line Items]
Coal-Fired Power Plant Capacity | MW					255
Nevada Power Company [Member] | Navajo Generating Station [Member]
Public Utilities, General Disclosures [Line Items]
Jointly Owned Utility Plant, Proportionate Ownership Share	[1]			11.00%	11.00%
Regulatory Assets, Noncurrent						$ 12
Nevada Power Company [Member] | Public Utilities Commission, Nevada [Member] | General Rate Case [Member]
Public Utilities, General Disclosures [Line Items]
Public Utilities. Filing Supported Rate Increase (Decrease), Amount			$ 96,000,000
Public Utilities, Requested Rate Increase (Decrease), Amount			$ 120,000,000
Public Utilities, Approved Rate Increase (Decrease), Amount		$ 93,000,000
One-Time Bill Credit				$ 120,000,000
Nevada Power Company [Member] | Public Utilities Commission, Nevada [Member] | Energy Efficiency Rate Case [Member]
Public Utilities, General Disclosures [Line Items]
Customer Refund Liability, Current				$ 8,000,000	$ 8,000,000		$ 8,000,000
[1]	Includes amounts related to nuclear fuel.

Regulatory Matters - SPPC - Reg

Regulatory Matters - SPPC - Regulatory Assets (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019
Regulatory Assets [Line Items]
Regulatory Assets		$ 3,440	$ 2,881
Regulatory Assets, Current		283	115
Regulatory Assets, Noncurrent		3,157	2,766
Remaining Amounts of Regulatory Assets for which No Return on Investment During Recovery Period is Provided		1,600	1,400
Deferred Operating Costs
Regulatory Assets [Line Items]
Regulatory Assets		124	134
Sierra Pacific Power Company [Member]
Regulatory Assets [Line Items]
Regulatory Assets		334	295
Regulatory Assets, Current		67	12
Regulatory Assets, Noncurrent		267	283
Remaining Amounts of Regulatory Assets for which No Return on Investment During Recovery Period is Provided		$ 149	168
Sierra Pacific Power Company [Member] | Employee benefit plans
Regulatory Assets [Line Items]
Regulatory Asset, Amortization Period	[1]	8 years
Regulatory Assets	[1]	$ 81	107
Sierra Pacific Power Company [Member] | Merger costs from 1999 merger
Regulatory Assets [Line Items]
Regulatory Asset, Amortization Period		26 years
Regulatory Assets		$ 68	71
Sierra Pacific Power Company [Member] | Natural Disaster Protection Plan
Regulatory Assets [Line Items]
Regulatory Asset, Amortization Period		1 year
Regulatory Assets		$ 45	8
Sierra Pacific Power Company [Member] | Deferred Operating Costs
Regulatory Assets [Line Items]
Regulatory Asset, Amortization Period		11 years
Regulatory Assets		$ 27	23
Sierra Pacific Power Company [Member] | Abandoned projects
Regulatory Assets [Line Items]
Regulatory Asset, Amortization Period		6 years
Regulatory Assets		$ 22	24
Sierra Pacific Power Company [Member] | Deferred energy costs
Regulatory Assets [Line Items]
Regulatory Asset, Amortization Period		1 year
Regulatory Assets		$ 22	4
Sierra Pacific Power Company [Member] | Losses on reacquired debt
Regulatory Assets [Line Items]
Regulatory Asset, Amortization Period		15 years
Regulatory Assets		$ 15	17
Sierra Pacific Power Company [Member] | Other
Regulatory Assets [Line Items]
Regulatory Assets		$ 54	$ 41
[1]	Represents amounts not yet recognized as a component of net periodic benefit cost that are expected to be included in regulated rates when recognized.

Regulatory Matters - SPPC - R_2

Regulatory Matters - SPPC - Regulatory Liabilities (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Regulatory Liabilities [Line Items]
Regulatory Liabilities		$ 7,475	$ 7,311
Regulatory Liability, Current		254	211
Regulatory Liability, Noncurrent		$ 7,221	$ 7,100
Federal statutory income tax rate		21.00%	21.00%	21.00%	35.00%
Tax Cuts and Jobs Act of 2017 [Member]
Regulatory Liabilities [Line Items]
Federal statutory income tax rate					21.00%
Cost of removal
Regulatory Liabilities [Line Items]
Regulatory Liabilities	[1]	$ 2,435	$ 2,370
Other
Regulatory Liabilities [Line Items]
Regulatory Liabilities		854	785
Sierra Pacific Power Company [Member]
Regulatory Liabilities [Line Items]
Regulatory Liabilities		497	538
Regulatory Liability, Current		34	49
Regulatory Liability, Noncurrent		$ 463	$ 489
Federal statutory income tax rate		21.00%	21.00%	21.00%
Sierra Pacific Power Company [Member] | Tax Cuts and Jobs Act of 2017 [Member]
Regulatory Liabilities [Line Items]
Federal statutory income tax rate		21.00%		35.00%
Sierra Pacific Power Company [Member] | Deferred income taxes
Regulatory Liabilities [Line Items]
Regulatory Liabilities	[2]	$ 249	$ 263
Sierra Pacific Power Company [Member] | Cost of removal
Regulatory Liabilities [Line Items]
Regulatory Liability, Amortization Period	[3]	37 years
Regulatory Liabilities	[3]	$ 197	217
Sierra Pacific Power Company [Member] | Other
Regulatory Liabilities [Line Items]
Regulatory Liabilities		$ 51	$ 58
[1]	Amounts represent estimated costs, as accrued through depreciation rates and exclusive of ARO liabilities, of removing regulated property, plant and equipment in accordance with accepted regulatory practices. Amounts are deducted from rate base or otherwise accrue a carrying cost.
[2]	Amounts primarily represent income tax liabilities related to the federal tax rate change from 35% to 21% that are probable to be passed on to customers, offset by income tax benefits related to accelerated tax depreciation and certain property-related basis differences and other various differences that were previously passed on to customers and will be included in regulated rates when the temporary differences reverse.
[3]	Amounts represent estimated costs, as accrued through depreciation rates and exclusive of ARO liabilities, of removing regulated property, plant and equipment in accordance with accepted regulatory practices.

Regulatory Matters - SPPC - Oth

Regulatory Matters - SPPC - Other (Details) - Sierra Pacific Power Company [Member] - Public Utilities Commission, Nevada [Member] - USD ($) $ in Millions	Jan. 01, 2020	Jun. 30, 2019	Dec. 31, 2020
General Rate Case [Member]
Public Utilities, General Disclosures [Line Items]
Public Utilities, Requested Rate Increase (Decrease), Amount		$ 5
Public Utilities, Approved Rate Increase (Decrease), Amount	$ 3		$ 5
Public Utilities, Revenue Sharing, Percent			50.00%
Public Utilities, Approved Return on Equity, Percentage			9.70%
Energy Efficiency Rate Case [Member]
Public Utilities, General Disclosures [Line Items]
Customer Refund Liability, Current			$ 2

Regulatory Matters - EEGH - Reg

Regulatory Matters - EEGH - Regulatory Assets (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Regulatory Assets [Line Items]
Total regulatory assets	$ 3,440	$ 2,881
Regulatory Assets, Current	283	115
Regulatory Assets, Noncurrent	3,157	2,766
Remaining Amounts of Regulatory Assets for which No Return on Investment During Recovery Period is Provided	1,600	1,400
Eastern Energy Gas Holdings, LLC [Member]
Regulatory Assets [Line Items]
Total regulatory assets	82	48
Regulatory Assets, Current	8	8
Regulatory Assets, Noncurrent	74	40
Remaining Amounts of Regulatory Assets for which No Return on Investment During Recovery Period is Provided	10	46
Eastern Energy Gas Holdings, LLC [Member] | Employee benefit plans
Regulatory Assets [Line Items]
Total regulatory assets	70	0
Eastern Energy Gas Holdings, LLC [Member] | Interest rate hedges
Regulatory Assets [Line Items]
Total regulatory assets	0	32
Eastern Energy Gas Holdings, LLC [Member] | Other
Regulatory Assets [Line Items]
Total regulatory assets	$ 12	$ 16

Regulatory Matters - EEGH - R_2

Regulatory Matters - EEGH - Regulatory Liabilities (Details) - USD ($) $ in Millions		Dec. 31, 2020	Dec. 31, 2019
Regulatory Liabilities [Line Items]
Regulatory Liabilities		$ 7,475	$ 7,311
Regulatory Liability, Current		254	211
Regulatory Liability, Noncurrent		7,221	7,100
Cost of removal
Regulatory Liabilities [Line Items]
Regulatory Liabilities	[1]	2,435	2,370
Deferred Income Tax Charge [Member]
Regulatory Liabilities [Line Items]
Regulatory Liabilities	[2]	3,600	3,611
Asset Retirement Obligation Costs
Regulatory Liabilities [Line Items]
Regulatory Liabilities		305	241
Eastern Energy Gas Holdings, LLC [Member]
Regulatory Liabilities [Line Items]
Regulatory Liabilities		709	841
Regulatory Liability, Current		40	41
Regulatory Liability, Noncurrent		669	800
Eastern Energy Gas Holdings, LLC [Member] | Cost of removal
Regulatory Liabilities [Line Items]
Regulatory Liability, Noncurrent		88	73
Eastern Energy Gas Holdings, LLC [Member] | Deferred Income Tax Charge [Member]
Regulatory Liabilities [Line Items]
Regulatory Liabilities		473	560
Eastern Energy Gas Holdings, LLC [Member] | Pension and other postretirement costs [Member]
Regulatory Liabilities [Line Items]
Regulatory Liabilities		115	133
Eastern Energy Gas Holdings, LLC [Member] | Provision for future cost of removal and AROs
Regulatory Liabilities [Line Items]
Regulatory Liabilities		89	113
Eastern Energy Gas Holdings, LLC [Member] | Other
Regulatory Liabilities [Line Items]
Regulatory Liabilities		$ 32	$ 35
[1]	Amounts represent estimated costs, as accrued through depreciation rates and exclusive of ARO liabilities, of removing regulated property, plant and equipment in accordance with accepted regulatory practices. Amounts are deducted from rate base or otherwise accrue a carrying cost.
[2]	Amounts primarily represent income tax liabilities related to the federal tax rate change from 35% to 21% that are probable to be passed on to customers, offset by income tax benefits related to certain property-related basis differences and other various differences that were previously passed on to customers and will be included in regulated rates when the temporary differences reverse.

Regulatory Matters - EEGH - Pot

Regulatory Matters - EEGH - Potential Loss Contingencies (Details) - Eastern Gas Transmission and Storage, Inc. [Member] - USD ($) $ in Millions	1 Months Ended	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2018
2012 FERC Case, Disallowance Of Plant, Resolved In Q4 2018 [Member]
Regulatory Liabilities [Line Items]
Litigation Settlement, Expense		$ 129
Litigation Settlement, Expense, Net of Tax		$ 94
FERC Case, Disallowance Of Capitalized AFUDC, Resolved In December 2020 [Member]
Regulatory Liabilities [Line Items]
Litigation Settlement, Expense	$ 43
Litigation Settlement, Expense, Net of Tax	$ 31

Regulatory Matters - EEGH - Oth

Regulatory Matters - EEGH - Other Regulatory Matters (Details) dekathermPerDay in Thousands, $ in Millions	Aug. 01, 2020USD ($)	Jan. 31, 2020USD ($)	Dec. 31, 2019USD ($)dekathermPerDay	Dec. 31, 2018USD ($)	Jun. 30, 2015USD ($)dekathermPerDayagreement	Dec. 31, 2014dekathermPerDay	Oct. 31, 2020USD ($)	Sep. 30, 2020USD ($)	Jun. 30, 2020USD ($)	Jun. 30, 2019USD ($)	Dec. 31, 2020USD ($)
Regulatory Liabilities [Line Items]
Regulatory Liabilities			$ 7,311								$ 7,475
Asset Retirement Obligation Costs
Regulatory Liabilities [Line Items]
Regulatory Liabilities			$ 241								305
Cove Point LNG, LP [Member] | Federal Energy Regulatory Commission [Member]
Regulatory Liabilities [Line Items]
Number of binding precedent agreements | agreement					2
Cost to acquire project				$ 45	$ 150
Impairment of assets				37
Impairment of assets, after-tax				$ 28
Firm transportation service (Dth per day) | dekathermPerDay					150
Cove Point LNG, LP [Member] | Federal Energy Regulatory Commission [Member] | General Rate Case [Member]
Regulatory Liabilities [Line Items]
Public Utilities, Requested Rate Increase (Decrease), Amount		$ 182
Cove Point LNG, LP [Member] | Federal Energy Regulatory Commission [Member] | General Rate Case, Increase In Revenue [Member]
Regulatory Liabilities [Line Items]
Public Utilities, Approved Rate Increase (Decrease), Amount	$ 4
Cove Point LNG, LP [Member] | Federal Energy Regulatory Commission [Member] | General Rate Case, Decrease In Depreciation Expense [Member]
Regulatory Liabilities [Line Items]
Public Utilities, Approved Rate Increase (Decrease), Amount	$ (1)
Cove Point LNG, LP [Member] | Federal Energy Regulatory Commission [Member] | General Rate Case, Provision [Member]
Regulatory Liabilities [Line Items]
Public Utilities, Approved Rate Increase (Decrease), Amount							$ 7
Eastern Gas Transmission and Storage, Inc. [Member] | Cancellation Of Atlantic Coast Pipeline Project [Member]
Regulatory Liabilities [Line Items]
Impairment of assets									$ 482
Impairment of assets, after-tax									359
Eastern Gas Transmission and Storage, Inc. [Member] | Atlantic Coast Pipeline Project, Available For Potential Modified Project [Member]
Regulatory Liabilities [Line Items]
Impairment of assets								$ 10
Impairment of assets, after-tax								7
Benefit from ARO revision								29
Benefit from ARO revision, after-tax								$ 20
Property, plant and equipment, net											40
Eastern Gas Transmission and Storage, Inc. [Member] | Cancellation Of Sweden Valley Project [Member]
Regulatory Liabilities [Line Items]
Impairment of assets										$ 13
Impairment of assets, after-tax										10
Eastern Gas Transmission and Storage, Inc. [Member] | Federal Energy Regulatory Commission [Member]
Regulatory Liabilities [Line Items]
Firm transportation service (Dth per day) | dekathermPerDay						1,500
Eastern Gas Transmission and Storage, Inc. [Member] | Federal Energy Regulatory Commission [Member] | Transportation Service To Tennessee Gas Pipeline Company [Member]
Regulatory Liabilities [Line Items]
Firm transportation service (Dth per day) | dekathermPerDay			120
Eastern Gas Transmission and Storage, Inc. [Member] | Federal Energy Regulatory Commission [Member] | Cost Of Project For Transportation Service To Tennessee Gas Pipeline Company [Member]
Regulatory Liabilities [Line Items]
Public Utilities, Approved Rate Increase (Decrease), Amount										$ 17
Eastern Gas Transmission and Storage, Inc. [Member] | Asset Retirement Obligation Costs | Atlantic Coast Pipeline Project, Available For Potential Modified Project [Member]
Regulatory Liabilities [Line Items]
Regulatory Liabilities									$ 75
Eastern Energy Gas Holdings, LLC [Member]
Regulatory Liabilities [Line Items]
Regulatory Liabilities			$ 841								709
Property, plant and equipment, net			$ 11,727								$ 10,144

Investments and Restricted Ca_3

Investments and Restricted Cash and Investments (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Investments [Abstract]
Investments	$ 6,600	$ 1,719
Gain (Loss) on Investments	4,797	(288)	$ (538)
Marketable Securities, Realized Gain (Loss)	6	2
Marketable Securities, Unrealized Gain (Loss)	4,791	(290)
Equity method investments:
Tax Equity Contributions	2,736	1,619	$ 698
Purchase Obligation, Due in Next Twelve Months	563
Equity method investments	7,067	3,947
Restricted cash and cash equivalents:
Restricted cash and investments	831	829
Investments, including equity method and restricted cash and investments	14,498	6,495
Investments, including equity method and restricted cash and investments, noncurrent	14,320	6,255
Investments, including equity method and restricted cash and investments, current	178	240
Eastern Energy Gas Holdings, LLC [Member]
Equity method investments:
Equity method investments	244	312
Restricted cash and cash equivalents:
Restricted cash and investments	13	12
Investments, including equity method and restricted cash and investments	257	324
Investments, including equity method and restricted cash and investments, noncurrent	244	312
Investments, including equity method and restricted cash and investments, current	13	12
Quad Cities Station nuclear decommissioning trust funds [Member]
Restricted cash and cash equivalents:
Decommissioning Fund Investments, Fair Value	676	599
Restricted Cash and Investments, Other [Member]
Restricted cash and cash equivalents:
Restricted cash and investments	155	230
Electric Transmission Texas, LLC [Member]
Equity method investments:
Equity method investments	$ 594	555
Equity method investment, ownership percentage	50.00%
Bridger Coal Company [Member]
Equity method investments:
Equity method investments	$ 74	81
Equity method investment, ownership percentage	66.67%
Tax Equity Investments
Equity method investments:
Equity method investments	$ 5,626	3,130
Other equity method investments [Member]
Equity method investments:
Equity method investments	118	181
Iroquois Gas Transmission System L.P. [Member]
Equity method investments:
Equity method investments	$ 580	0
Equity method investment, ownership percentage	50.00%
Iroquois Gas Transmission System L.P. [Member] | Eastern Energy Gas Holdings, LLC [Member]
Equity method investments:
Equity method investments	$ 244	276
Equity method investment, ownership percentage	50.00%
Equity Method Investments, JAX LNG, LLC
Equity method investments:
Equity method investments	$ 75	0
Equity method investment, ownership percentage	50.00%
BYD Company Limited common stock [Member]
Investments [Abstract]
Available-for-sale Securities, Equity Securities	$ 5,897	1,122
Rabbi trusts [Member]
Investments [Abstract]
Life Insurance, Corporate or Bank Owned, Amount	440	410
Other investments [Member]
Investments [Abstract]
Other Investments	$ 263	$ 187

Investments and Restricted Ca_4

Investments and Restricted Cash and Investments - MEC - (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Investments, Including Equity Method And Restricted Cash And Investments [Line Items]
Investments, including equity method and restricted cash and investments, noncurrent	$ 14,320	$ 6,255
Nuclear decommissioning trust funds [Member]
Investments, Including Equity Method And Restricted Cash And Investments [Line Items]
Decommissioning Fund Investments, Fair Value	676	599
MidAmerican Energy Company [Member]
Investments, Including Equity Method And Restricted Cash And Investments [Line Items]
Life Insurance, Corporate or Bank Owned, Amount	211	203
Other Investments	24	16
Investments, including equity method and restricted cash and investments, noncurrent	$ 911	$ 818
MidAmerican Energy Company [Member] | Domestic Equity Securities [Member]
Investments, Including Equity Method And Restricted Cash And Investments [Line Items]
Nuclear Decommissioning Trust Fund Ownership Percentage	56.00%	56.00%
MidAmerican Energy Company [Member] | US Government Corporations and Agencies Securities [Member]
Investments, Including Equity Method And Restricted Cash And Investments [Line Items]
Nuclear Decommissioning Trust Fund Ownership Percentage	30.00%	31.00%
MidAmerican Energy Company [Member] | Debt Security, Corporate, US [Member]
Investments, Including Equity Method And Restricted Cash And Investments [Line Items]
Nuclear Decommissioning Trust Fund Ownership Percentage	11.00%	10.00%
MidAmerican Energy Company [Member] | Other Securities [Member]
Investments, Including Equity Method And Restricted Cash And Investments [Line Items]
Nuclear Decommissioning Trust Fund Ownership Percentage	3.00%	3.00%
MidAmerican Energy Company [Member] | Nuclear decommissioning trust funds [Member]
Investments, Including Equity Method And Restricted Cash And Investments [Line Items]
Decommissioning Fund Investments, Fair Value	$ 676	$ 599

Investments and Restricted Ca_5

Investments and Restricted Cash and Investments - MidAmerican Funding - (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
MidAmerican Funding, LLC and Subsidiaries [Member]
Investments, Including Equity Method And Restricted Cash And Investments [Line Items]
Life Insurance, Corporate or Bank Owned, Amount	$ 2	$ 2

Investments and Restricted Ca_6

Investments and Restricted Cash and Investments - EEGH (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Equity method investments:
Equity method investments	$ 7,067	$ 3,947
Restricted cash and cash equivalents:
Restricted cash and investments	831	829
Investments, including equity method and restricted cash and investments, current	178	240
Investments, including equity method and restricted cash and investments, noncurrent	14,320	6,255
Investments, including equity method and restricted cash and investments	14,498	6,495
Distributions received from investments	77	74	$ 64
Eastern Energy Gas Holdings, LLC [Member]
Equity method investments:
Equity method investments	244	312
Restricted cash and cash equivalents:
Restricted cash and investments	13	12
Investments, including equity method and restricted cash and investments, current	13	12
Investments, including equity method and restricted cash and investments, noncurrent	244	312
Investments, including equity method and restricted cash and investments	257	324
Investment exceeded share of equity in net assets	130	146
Eastern Energy Gas Holdings, LLC [Member] | Bank Time Deposits [Member]
Restricted cash and cash equivalents:
Restricted cash and investments	13	12
Iroquois Gas Transmission System L.P. [Member]
Equity method investments:
Equity method investments	$ 580	0
Restricted cash and cash equivalents:
Equity method investment, ownership percentage	50.00%
Iroquois Gas Transmission System L.P. [Member] | Eastern Energy Gas Holdings, LLC [Member]
Equity method investments:
Equity method investments	$ 244	276
Restricted cash and cash equivalents:
Equity method investment, ownership percentage	50.00%
White River Hub, LLC [Member] | Eastern Energy Gas Holdings, LLC [Member]
Equity method investments:
Equity method investments	$ 0	$ 36
Restricted cash and cash equivalents:
Equity method investment, ownership percentage	50.00%

BHE Debt (Details)

BHE Debt (Details) - USD ($) $ in Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2017	Dec. 31, 2020	Dec. 31, 2019
BHE Debt [Line Items]
Par value		$ 49,759
Noncurrent senior debt		12,997	$ 8,231
BHE junior subordinated debentures		100	100
Berkshire Hathaway Energy [Member] | BHE Junior Subordinated Debentures, due June 2057 [Member]
BHE Debt [Line Items]
Conversion of Stock, Shares Converted	181,819
Senior Notes [Member] | Berkshire Hathaway Energy [Member]
BHE Debt [Line Items]
Par value		13,551
Total BHE Senior Debt		13,447	8,581
Current senior debt		450	350
Noncurrent senior debt		$ 12,997	8,231
Senior Notes [Member] | Berkshire Hathaway Energy [Member] | 2.40% Senior Notes, due 2020 [Member]
BHE Debt [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		2.40%
Par value		$ 0
Total BHE Senior Debt		$ 0	349
Senior Notes [Member] | Berkshire Hathaway Energy [Member] | Senior Notes, 2.375%, due 2021 [Member]
BHE Debt [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		2.375%
Par value		$ 450
Total BHE Senior Debt		$ 448	448
Senior Notes [Member] | Berkshire Hathaway Energy [Member] | Senior Notes, 2.800%, due 2023 [Member]
BHE Debt [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		2.80%
Par value		$ 400
Total BHE Senior Debt		$ 398	398
Senior Notes [Member] | Berkshire Hathaway Energy [Member] | 3.75%, Senior Notes, due 2023 [Member]
BHE Debt [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		3.75%
Par value		$ 500
Total BHE Senior Debt		$ 498	498
Senior Notes [Member] | Berkshire Hathaway Energy [Member] | 3.50% Senior Notes, due 2025 [Member]
BHE Debt [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		3.50%
Par value		$ 400
Total BHE Senior Debt		$ 398	398
Senior Notes [Member] | Berkshire Hathaway Energy [Member] | Senior Notes, 4.05%, due 2025
BHE Debt [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		4.05%
Par value		$ 1,250
Total BHE Senior Debt		$ 1,246	0
Senior Notes [Member] | Berkshire Hathaway Energy [Member] | Senior Notes, 3.250%, due 2028 [Member]
BHE Debt [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		3.25%
Par value		$ 600
Total BHE Senior Debt		$ 594	594
Senior Notes [Member] | Berkshire Hathaway Energy [Member] | 8.48%, Senior Notes, due 2028 [Member]
BHE Debt [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		8.48%
Par value		$ 256
Total BHE Senior Debt		$ 257	259
Senior Notes [Member] | Berkshire Hathaway Energy [Member] | Senior Notes, 3.70%, due 2030
BHE Debt [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		3.70%
Par value		$ 1,100
Total BHE Senior Debt		$ 1,096	0
Senior Notes [Member] | Berkshire Hathaway Energy [Member] | Senior Notes, 1.65% due 2031
BHE Debt [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		1.65%
Par value		$ 500
Total BHE Senior Debt		$ 497	0
Senior Notes [Member] | Berkshire Hathaway Energy [Member] | 6.125%, Senior Bonds, due 2036 [Member]
BHE Debt [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		6.125%
Par value		$ 1,670
Total BHE Senior Debt		$ 1,661	1,661
Senior Notes [Member] | Berkshire Hathaway Energy [Member] | 5.95%, Senior Bonds, due 2037 [Member]
BHE Debt [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		5.95%
Par value		$ 550
Total BHE Senior Debt		$ 548	548
Senior Notes [Member] | Berkshire Hathaway Energy [Member] | 6.50%, Senior Bonds, due 2037 [Member]
BHE Debt [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		6.50%
Par value		$ 225
Total BHE Senior Debt		$ 223	223
Senior Notes [Member] | Berkshire Hathaway Energy [Member] | 5.15%, Senior Notes, due 2043 [Member]
BHE Debt [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		5.15%
Par value		$ 750
Total BHE Senior Debt		$ 740	740
Senior Notes [Member] | Berkshire Hathaway Energy [Member] | 4.50% Senior Notes, due 2045 [Member]
BHE Debt [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		4.50%
Par value		$ 750
Total BHE Senior Debt		$ 738	738
Senior Notes [Member] | Berkshire Hathaway Energy [Member] | Senior Notes, 3.80%, due 2048 [Member]
BHE Debt [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		3.80%
Par value		$ 750
Total BHE Senior Debt		$ 738	737
Senior Notes [Member] | Berkshire Hathaway Energy [Member] | Senior Notes, 4.45%, due 2049 [Member]
BHE Debt [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		4.45%
Par value		$ 1,000
Total BHE Senior Debt		$ 990	990
Senior Notes [Member] | Berkshire Hathaway Energy [Member] | Senior Notes, 4.25%, due 2050
BHE Debt [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		4.25%
Par value		$ 900
Total BHE Senior Debt		$ 889	0
Senior Notes [Member] | Berkshire Hathaway Energy [Member] | Senior Notes, 2.85%, due 2051
BHE Debt [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		2.85%
Par value		$ 1,500
Total BHE Senior Debt		1,488	0
Junior Subordinated Debt [Member] | Berkshire Hathaway Energy [Member]
BHE Debt [Line Items]
Par value		100
BHE junior subordinated debentures		100	100
Junior Subordinated Debt [Member] | Berkshire Hathaway Energy [Member] | BHE Junior Subordinated Debentures, due June 2057 [Member]
BHE Debt [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	5.00%
Par value		100
BHE junior subordinated debentures	$ 100		100
Interest Expense, Debt		$ 5	$ 5

Short-Term Debt and Credit Fa_3

Short-Term Debt and Credit Facilities - Credit Facilities (Details) £ in Millions, $ in Millions		Dec. 31, 2020USD ($)	Dec. 31, 2020GBP (£)	Dec. 31, 2020CAD ($)	Dec. 31, 2019USD ($)
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	[1]	$ 11,030,000,000			$ 9,412,000,000
Short-term debt	[1]	2,286,000,000			3,214,000,000
Line of Credit Facility, Amounts Supported	[1]	590,000,000			629,000,000
Line of Credit Facility, Remaining Borrowing Capacity	[1]	8,154,000,000			5,569,000,000
BHE Renewables [Member]
Line of Credit Facility [Line Items]
Letters of Credit Outstanding, Amount		305,000,000			373,000,000
Berkshire Hathaway Energy [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		3,500,000,000			3,500,000,000
Short-term debt		0			1,590,000,000
Line of Credit Facility, Amounts Supported		0			0
Line of Credit Facility, Remaining Borrowing Capacity		3,500,000,000			1,910,000,000
PacifiCorp [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		1,200,000,000			1,200,000,000
Short-term debt		93,000,000			130,000,000
Line of Credit Facility, Amounts Supported		218,000,000			256,000,000
Line of Credit Facility, Remaining Borrowing Capacity		889,000,000			814,000,000
MidAmerican Energy Company and Subsidiaries [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		1,505,000,000			1,305,000,000
Line of Credit Facility, Amounts Supported		370,000,000			370,000,000
Line of Credit Facility, Remaining Borrowing Capacity		1,135,000,000			935,000,000
MidAmerican Funding [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		1,509,000,000			1,309,000,000
Short-term debt		0			0
Line of Credit Facility, Amounts Supported		370,000,000			370,000,000
Line of Credit Facility, Remaining Borrowing Capacity		1,139,000,000			939,000,000
NV Energy [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		650,000,000			650,000,000
Short-term debt		45,000,000			0
Line of Credit Facility, Amounts Supported		0			0
Line of Credit Facility, Remaining Borrowing Capacity		605,000,000			650,000,000
Northern Powergrid Holdings [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		228,000,000			199,000,000
Short-term debt		23,000,000			0
Line of Credit Facility, Amounts Supported		0			0
Line of Credit Facility, Remaining Borrowing Capacity		205,000,000			199,000,000
AltaLink [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		923,000,000			674,000,000
Short-term debt		225,000,000			211,000,000
Line of Credit Facility, Amounts Supported		2,000,000			3,000,000
Line of Credit Facility, Remaining Borrowing Capacity		696,000,000			460,000,000
Other [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		3,020,000,000			1,880,000,000
Short-term debt		1,900,000,000			1,283,000,000
Line of Credit Facility, Amounts Supported		0			0
Line of Credit Facility, Remaining Borrowing Capacity		1,120,000,000			597,000,000
Sierra Pacific Power Company [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		250,000,000			250,000,000
Short-term debt		45,000,000			0
Line of Credit Facility, Remaining Borrowing Capacity		205,000,000			250,000,000
Tax exempt bond obligations and commodity contract collateral requirement [Member] | PacifiCorp [Member]
Line of Credit Facility [Line Items]
Letters of Credit Outstanding, Amount		11,000,000			13,000,000
Certain transactions required by third parties [Member] | PacifiCorp [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Amounts Supported		11,000,000			13,000,000
Line of Credit [Member] | BHE Renewables [Member]
Line of Credit Facility [Line Items]
Letters of Credit Outstanding, Amount		$ 105,000,000			$ 107,000,000
Line of Credit [Member] | AltaLink Investments, L.P. [Member]
Line of Credit Facility [Line Items]
Debt To Capitalization Ratio		0.8	0.8	0.8
EBITDA to interest expense ratio		2.25	2.25	2.25
Debt, Weighted Average Interest Rate		1.47%	1.47%	1.47%	3.08%
Short-term debt		$ 112,000,000			$ 19,000,000
Line of Credit [Member] | Berkshire Hathaway Energy [Member]
Line of Credit Facility [Line Items]
Debt To Capitalization Ratio		0.70	0.70	0.70
Debt, Weighted Average Interest Rate					1.91%
Line of Credit [Member] | PacifiCorp [Member]
Line of Credit Facility [Line Items]
Debt To Capitalization Ratio		0.65	0.65	0.65
Debt, Weighted Average Interest Rate		0.16%	0.16%	0.16%	2.05%
Line of Credit [Member] | MidAmerican Energy Company and Subsidiaries [Member]
Line of Credit Facility [Line Items]
Debt To Capitalization Ratio		0.65	0.65	0.65
Line of Credit [Member] | Nevada Power Company [Member]
Line of Credit Facility [Line Items]
Debt To Capitalization Ratio		0.65	0.65	0.65
Line of Credit [Member] | AltaLink, L.P. [Member]
Line of Credit Facility [Line Items]
Debt To Capitalization Ratio		0.75	0.75	0.75
Debt, Weighted Average Interest Rate		0.36%	0.36%	0.36%	2.16%
Short-term debt		$ 113,000,000			$ 192,000,000
Line of Credit [Member] | Sierra Pacific Power Company [Member]
Line of Credit Facility [Line Items]
Debt, Weighted Average Interest Rate		0.90%	0.90%	0.90%
Letter of Credit [Member] | AltaLink Investments, L.P. [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity				$ 10
Unsecured credit facility, $400 million, expiring August 2020 [Member] | Line of Credit [Member] | MidAmerican Energy Company and Subsidiaries [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		$ 600,000,000
Unsecured credit facility, $3.5 billion, expiring June 2022 [Member] | Line of Credit [Member] | Berkshire Hathaway Energy [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		$ 3,500,000,000
Multicurrency revolving credit facility, expiring October 2022 [Member] | Revolving Credit Facility [Member] | Northern Powergrid Holdings [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity | £			£ 150
Multicurrency revolving credit facility, expiring October 2022 [Member] | Line of Credit [Member] | Northern Powergrid Holdings [Member]
Line of Credit Facility [Line Items]
Interest Coverage Ratio		2.5	2.5	2.5
Multicurrency revolving credit facility, expiring October 2022 [Member] | Line of Credit [Member] | Northern Powergrid (Northeast) Limited [Member]
Line of Credit Facility [Line Items]
Debt to regulated asset value		0.65	0.65	0.65
Unsecured credit facility, £150 million, expiring April 2020 [Member] | Line of Credit [Member] | Northern Powergrid Holdings [Member]
Line of Credit Facility [Line Items]
Debt to regulated asset value		0.8	0.8	0.8
Secured credit facility, C$500 million, expiring December 2023 [Member] | Line of Credit [Member] | AltaLink, L.P. [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity				$ 500
Secured credit facility, C$75 million, expiring December 2023 [Member] | Line of Credit [Member] | AltaLink, L.P. [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity				75
Unsecured credit facility, C$300 million, expiring December 2023 [Member] | Line of Credit [Member] | AltaLink Investments, L.P. [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity				$ 300
Unsecured credit facility, $600 million, expiring September 2022 [Member] | Line of Credit [Member] | HomeServices [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		$ 600,000,000
Debt, Weighted Average Interest Rate		1.15%	1.15%	1.15%	3.29%
Short-term debt		$ 100,000,000			$ 318,000,000
Unsecured credit facility, $1.3 billion, expiring January 2020 to December 2020 [Member] | Line of Credit [Member] | HomeServices [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity					$ 1,300,000,000
Debt, Weighted Average Interest Rate					3.51%
Short-term debt					$ 965,000,000
Revolving credit facility, C$100 million, expiring April 2021 | Line of Credit [Member] | AltaLink Investments, L.P. [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity				$ 200
Revolving credit facility, C$100 million, expiring April 2021 | Line of Credit [Member] | AltaLink, L.P. [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity				$ 100
Unsecured credit facility, $2.4 billion, expiring January 2021 to September 2021 | Line of Credit [Member] | HomeServices [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		$ 2,400,000,000
Debt, Weighted Average Interest Rate		2.03%	2.03%	2.03%
Short-term debt		$ 1,800,000,000
Line of Credit [Member] | Nevada Power Company [Member]
Line of Credit Facility [Line Items]
Short-term debt		0			$ 0
Line of Credit [Member] | Secured credit facility, $400 million, expiring June 2022 [Member] | Nevada Power Company [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		400,000,000
Line of Credit [Member] | Secured credit facility, $250 million, expiring June 2022 [Member] | Sierra Pacific Power Company [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		$ 250,000,000
[1]	The table does not include unused credit facilities and letters of credit for investments that are accounted for under the equity method.

Short-Term Debt and Credit Fa_4

Short-Term Debt and Credit Faciliites (Details) $ in Millions		Dec. 31, 2020USD ($)	Dec. 31, 2020CAD ($)	Dec. 31, 2019USD ($)
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	[1]	$ 11,030,000,000		$ 9,412,000,000
Line of Credit Facility, Amounts Supported	[1]	(590,000,000)		(629,000,000)
Short-term Debt	[1]	(2,286,000,000)		(3,214,000,000)
Berkshire Hathaway Energy [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		3,500,000,000		3,500,000,000
Line of Credit Facility, Amounts Supported		0		0
Short-term Debt		$ 0		$ (1,590,000,000)
Berkshire Hathaway Energy [Member] | Line of Credit [Member]
Line of Credit Facility [Line Items]
Debt, Weighted Average Interest Rate				1.91%
Debt To Capitalization Ratio		0.70	0.70
PacifiCorp [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		$ 1,200,000,000		$ 1,200,000,000
Line of Credit Facility, Amounts Supported		(218,000,000)		(256,000,000)
Short-term Debt		$ (93,000,000)		$ (130,000,000)
PacifiCorp [Member] | Line of Credit [Member]
Line of Credit Facility [Line Items]
Debt, Weighted Average Interest Rate		0.16%	0.16%	2.05%
Debt To Capitalization Ratio		0.65	0.65
MidAmerican Energy Company and Subsidiaries [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		$ 1,505,000,000		$ 1,305,000,000
Line of Credit Facility, Amounts Supported		$ (370,000,000)		(370,000,000)
MidAmerican Energy Company and Subsidiaries [Member] | Line of Credit [Member]
Line of Credit Facility [Line Items]
Debt To Capitalization Ratio		0.65	0.65
MidAmerican Funding [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		$ 1,509,000,000		1,309,000,000
Line of Credit Facility, Amounts Supported		(370,000,000)		(370,000,000)
Short-term Debt		$ 0		0
Nevada Power Company [Member] | Line of Credit [Member]
Line of Credit Facility [Line Items]
Debt To Capitalization Ratio		0.65	0.65
Sierra Pacific Power Company [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		$ 250,000,000		250,000,000
Short-term Debt		$ (45,000,000)		0
Sierra Pacific Power Company [Member] | Line of Credit [Member]
Line of Credit Facility [Line Items]
Debt, Weighted Average Interest Rate		0.90%	0.90%
Northern Powergrid Holdings [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		$ 228,000,000		199,000,000
Line of Credit Facility, Amounts Supported		0		0
Short-term Debt		$ (23,000,000)		$ 0
AltaLink, L.P. [Member] | Line of Credit [Member]
Line of Credit Facility [Line Items]
Debt, Weighted Average Interest Rate		0.36%	0.36%	2.16%
Debt To Capitalization Ratio		0.75	0.75
Short-term Debt		$ (113,000,000)		$ (192,000,000)
ALP Investments [Member] | Line of Credit [Member]
Line of Credit Facility [Line Items]
Debt, Weighted Average Interest Rate		1.47%	1.47%	3.08%
Debt To Capitalization Ratio		0.8	0.8
Short-term Debt		$ (112,000,000)		$ (19,000,000)
EBITDA to interest expense ratio		2.25	2.25
ALP Investments [Member] | Letter of Credit [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity			$ 10
BHE Renewables [Member]
Line of Credit Facility [Line Items]
Letters of Credit Outstanding, Amount		$ 305,000,000		373,000,000
BHE Renewables [Member] | Line of Credit [Member]
Line of Credit Facility [Line Items]
Letters of Credit Outstanding, Amount		$ 105,000,000		107,000,000
Unsecured credit facility, £150 million, expiring April 2020 [Member] | Northern Powergrid Holdings [Member] | Line of Credit [Member]
Line of Credit Facility [Line Items]
Debt to regulated asset value		0.8	0.8
Unsecured credit facility, $400 million, expiring November 2019 [Member] | MidAmerican Energy Company and Subsidiaries [Member] | Line of Credit [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity				$ 400,000,000
Unsecured credit facility, $600 million, expiring September 2022 [Member] | HomeServices [Member] | Line of Credit [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		$ 600,000,000
Debt, Weighted Average Interest Rate		1.15%	1.15%	3.29%
Short-term Debt		$ (100,000,000)		$ (318,000,000)
Secured credit facility, C$500 million, expiring December 2023 [Member] | AltaLink, L.P. [Member] | Line of Credit [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity			$ 500
Secured credit facility, C$75 million, expiring December 2023 [Member] | AltaLink, L.P. [Member] | Line of Credit [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity			75
Unsecured credit facility, C$300 million, expiring December 2023 [Member] | ALP Investments [Member] | Line of Credit [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity			$ 300
Line of Credit [Member] | Nevada Power Company [Member]
Line of Credit Facility [Line Items]
Short-term Debt		0		0
Line of Credit [Member] | Secured credit facility, $400 million, expiring June 2022 [Member] | Nevada Power Company [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		400,000,000
Tax exempt bond obligations and commodity contract collateral requirement [Member] | PacifiCorp [Member]
Line of Credit Facility [Line Items]
Letters of Credit Outstanding, Amount		11,000,000		13,000,000
Certain transactions required by third parties [Member] | PacifiCorp [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Amounts Supported		$ (11,000,000)		$ (13,000,000)
[1]	The table does not include unused credit facilities and letters of credit for investments that are accounted for under the equity method.

Short-Term Debt and Credit Fa_5

Short-Term Debt and Credit Facilities - Short-Term Debt (Details) - USD ($) $ in Millions		Dec. 31, 2020	Dec. 31, 2019
Short-term Debt [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	[1]	$ 11,030	$ 9,412
Short-term debt	[1]	2,286	3,214
Line of Credit Facility, Amounts Supported	[1]	590	629
Berkshire Hathaway Energy [Member]
Short-term Debt [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		3,500	3,500
Short-term debt		0	1,590
Line of Credit Facility, Amounts Supported		0	0
PacifiCorp [Member]
Short-term Debt [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		1,200	1,200
Short-term debt		93	130
Line of Credit Facility, Amounts Supported		218	256
MidAmerican Energy Company and Subsidiaries [Member]
Short-term Debt [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		1,505	1,305
Line of Credit Facility, Amounts Supported		$ 370	$ 370
Line of Credit [Member] | Berkshire Hathaway Energy [Member]
Short-term Debt [Line Items]
Debt, Weighted Average Interest Rate			1.91%
Line of Credit [Member] | PacifiCorp [Member]
Short-term Debt [Line Items]
Debt, Weighted Average Interest Rate		0.16%	2.05%
Line of Credit [Member] | PacifiCorp [Member] | Unsecured credit facility, $600 million, expiring June 2022, first facility, extended [Member]
Short-term Debt [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		$ 600
Line of Credit [Member] | PacifiCorp [Member] | Unsecured credit facility, $600 million, expiring June 2022, second facility, extended [Member]
Short-term Debt [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		$ 600
Commercial Paper [Member] | PacifiCorp [Member]
Short-term Debt [Line Items]
Debt, Weighted Average Interest Rate		0.16%	2.05%
[1]	The table does not include unused credit facilities and letters of credit for investments that are accounted for under the equity method.

Short-Term Debt and Credit Fa_6

Short-Term Debt and Credit Facilities - PacifiCorp - Credit Facility (Details) - USD ($) $ in Millions		Dec. 31, 2020	Dec. 31, 2019
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	[1]	$ 11,030	$ 9,412
Short-term Debt	[1]	(2,286)	(3,214)
Line of Credit Facility, Amounts Supported	[1]	(590)	(629)
Line of Credit Facility, Remaining Borrowing Capacity	[1]	8,154	5,569
PacifiCorp [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		1,200	1,200
Short-term Debt		(93)	(130)
Line of Credit Facility, Amounts Supported		(218)	(256)
Line of Credit Facility, Remaining Borrowing Capacity		$ 889	$ 814
PacifiCorp [Member] | Line of Credit [Member]
Line of Credit Facility [Line Items]
Debt, Weighted Average Interest Rate		0.16%	2.05%
Debt To Capitalization Ratio		0.65
PacifiCorp [Member] | Commercial Paper [Member]
Line of Credit Facility [Line Items]
Debt, Weighted Average Interest Rate		0.16%	2.05%
PacifiCorp [Member] | Unsecured credit facility, $600 million, expiring June 2022, first facility, extended [Member] | Line of Credit [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		$ 600
PacifiCorp [Member] | Unsecured credit facility, $600 million, expiring June 2022, second facility, extended [Member] | Line of Credit [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		600
PacifiCorp [Member] | Certain transactions required by third parties [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Amounts Supported		(11)	$ (13)
PacifiCorp [Member] | Tax exempt bond obligations and commodity contract collateral requirement [Member]
Line of Credit Facility [Line Items]
Letters of Credit Outstanding, Amount		$ 11	$ 13
Minimum [Member] | PacifiCorp [Member] | Line of Credit [Member]
Line of Credit Facility [Line Items]
Debt To Capitalization Ratio		0.65
Maximum [Member] | PacifiCorp [Member] | Line of Credit [Member]
Line of Credit Facility [Line Items]
Debt To Capitalization Ratio		1
[1]	The table does not include unused credit facilities and letters of credit for investments that are accounted for under the equity method.

Short-Term Debt and Credit Fa_7

Short-Term Debt and Credit Facilities - MEC - Credit Facility (Details) $ in Millions		Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	[1]	$ 11,030	$ 9,412
Short-term Debt	[1]	(2,286)	(3,214)
Line of Credit Facility, Amounts Supported	[1]	(590)	(629)
Line of Credit Facility, Remaining Borrowing Capacity	[1]	8,154	5,569
MidAmerican Energy Company [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		1,505	1,305
Line of Credit Facility, Amounts Supported		(370)	(370)
Line of Credit Facility, Remaining Borrowing Capacity		$ 1,135	935
MidAmerican Energy Company [Member] | Line of Credit [Member]
Line of Credit Facility [Line Items]
Debt To Capitalization Ratio		0.65
MidAmerican Energy Company [Member] | Commercial Paper [Member]
Line of Credit Facility [Line Items]
Regulatory Approval for Additional Short-Term Debt Issuances		$ 1,500
MidAmerican Energy Company [Member] | Unsecured credit facility, $900 million, expiring June 2022 [Member] | Line of Credit [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		900
MidAmerican Energy Company [Member] | Unsecured credit facility, $400 million, expiring August 2020 [Member] | Line of Credit [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		600
MidAmerican Energy Company [Member] | Unsecured 364-day Credit Facility, $5 million, expiring June [Member] | Line of Credit [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		5
MidAmerican Energy Company [Member] | Unsecured credit facility, $400 million, expiring November 2019 [Member] | Line of Credit [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity			$ 400
MidAmerican Energy Company [Member] | Unsecured credit facility, $600 million, expiring May 2021 | Line of Credit [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		$ 600
[1]	The table does not include unused credit facilities and letters of credit for investments that are accounted for under the equity method.

Short-Term Debt and Credit Fa_8

Short-Term Debt and Credit Facilities - MidAmerican Funding (Details) - USD ($) $ in Millions		Dec. 31, 2020	Dec. 31, 2019
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	[1]	$ 11,030	$ 9,412
MidAmerican Funding, LLC and Subsidiaries [Member] | Unsecured 364-day credit facility, $4 million, expiring June [Member] | MHC, Inc. [Member] | Line of Credit [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		$ 4
[1]	The table does not include unused credit facilities and letters of credit for investments that are accounted for under the equity method.

Short-Term Debt and Credit Fa_9

Short-Term Debt and Credit Facilities - NPC - Credit Facility (Details)		Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	[1]	$ 11,030,000,000	$ 9,412,000,000
Short-term debt	[1]	$ 2,286,000,000	3,214,000,000
Nevada Power Company [Member] | Line of Credit [Member]
Line of Credit Facility [Line Items]
Debt To Capitalization Ratio		0.65
Nevada Power Company [Member] | Line of Credit [Member]
Line of Credit Facility [Line Items]
Short-term debt		$ 0	$ 0
Nevada Power Company [Member] | Secured credit facility, $400 million, expiring June 2022 [Member] | Line of Credit [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		$ 400,000,000
Nevada Power Company [Member] | Minimum [Member] | Secured credit facility, $400 million, expiring June 2022 [Member] | Line of Credit [Member]
Line of Credit Facility [Line Items]
Debt To Capitalization Ratio		0.65
[1]	The table does not include unused credit facilities and letters of credit for investments that are accounted for under the equity method.

Short-Term Debt and Credit F_10

Short-Term Debt and Credit Facilities - SPPC - Credit Facility (Details) - USD ($) $ in Millions		Dec. 31, 2020	Dec. 31, 2019
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	[1]	$ 11,030	$ 9,412
Short-term Debt	[1]	(2,286)	(3,214)
Line of Credit Facility, Remaining Borrowing Capacity	[1]	8,154	5,569
Sierra Pacific Power Company [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		250	250
Short-term Debt		(45)	0
Line of Credit Facility, Remaining Borrowing Capacity		$ 205	$ 250
Sierra Pacific Power Company [Member] | Line of Credit [Member]
Line of Credit Facility [Line Items]
Debt, Weighted Average Interest Rate		0.90%
Sierra Pacific Power Company [Member] | Secured credit facility, $250 million, expiring June 2022 [Member] | Line of Credit [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		$ 250
Sierra Pacific Power Company [Member] | Secured credit facility, $250 million, expiring June 2022 [Member] | Line of Credit [Member] | Minimum [Member]
Line of Credit Facility [Line Items]
Debt To Capitalization Ratio		0.65
[1]	The table does not include unused credit facilities and letters of credit for investments that are accounted for under the equity method.

Short-Term Debt and Credit F_11

Short-Term Debt and Credit Facilities - EEGH - Credit Facility (Details) - USD ($)		Dec. 31, 2020	Dec. 31, 2019
Line of Credit Facility [Line Items]
Line of credit maximum borrowing capacity	[1]	$ 11,030,000,000	$ 9,412,000,000
Short-term debt	[1]	2,286,000,000	3,214,000,000
Eastern Energy Gas Holdings, LLC [Member]
Line of Credit Facility [Line Items]
Short-term debt		$ 0	$ 62,000,000
Eastern Energy Gas Holdings, LLC [Member] | Commercial Paper [Member]
Line of Credit Facility [Line Items]
Weighted average interest rate			1.98%
Short-term debt			$ 62,000,000
Eastern Energy Gas Holdings, LLC [Member] | Joint Revolving Credit Facility With Dominion Energy [Member] | Line of Credit [Member]
Line of Credit Facility [Line Items]
Line of credit maximum borrowing capacity			1,500,000,000
Line of credit sub-limit			$ 750,000,000
[1]	The table does not include unused credit facilities and letters of credit for investments that are accounted for under the equity method.

Subsidiary Debt - Summary (Deta

Subsidiary Debt - Summary (Details) € in Millions, $ in Millions		12 Months Ended
		Dec. 31, 2020USD ($)	Dec. 31, 2020EUR (€)	Dec. 31, 2019USD ($)
Debt Instrument [Line Items]
Par value		$ 49,759
Other Long-term Debt, Noncurrent		34,930		$ 28,483
NV Energy [Member]
Debt Instrument [Line Items]
Par value		3,701
Other long-term debt		3,673		3,821
BHE Pipeline Group [Member]
Debt Instrument [Line Items]
Par value		5,705
Other long-term debt		6,165		1,247
Subsidiary Debt [Member]
Debt Instrument [Line Items]
Par value		36,108
Other long-term debt		36,319		30,672
Other Long-term Debt, Current		1,389		2,189
Other Long-term Debt, Noncurrent		34,930		28,483
Subsidiary Debt [Member] | PacifiCorp [Member]
Debt Instrument [Line Items]
Par value		8,667
Other long-term debt		8,612		7,658
Subsidiary Debt [Member] | MidAmerican Funding [Member]
Debt Instrument [Line Items]
Par value		7,515
Other long-term debt		7,431		7,427
Subsidiary Debt [Member] | NV Energy [Member]
Debt Instrument [Line Items]
Par value		3,701
Other long-term debt		3,673		3,821
Subsidiary Debt [Member] | Northern Powergrid Holdings [Member]
Debt Instrument [Line Items]
Par value	[1]	3,285
Other long-term debt		3,259		3,221
Subsidiary Debt [Member] | BHE Pipeline Group [Member]
Debt Instrument [Line Items]
Par value		5,705
Other long-term debt		6,165		1,247
Subsidiary Debt [Member] | BHE Transmission [Member]
Debt Instrument [Line Items]
Par value	[2]	3,897
Other long-term debt		3,877		3,879
Subsidiary Debt [Member] | HomeServices [Member]
Debt Instrument [Line Items]
Par value		186
Other long-term debt		186		213
Subsidiary Debt [Member] | Berkshire Hathaway Energy Renewables [Member]
Debt Instrument [Line Items]
Par value		3,152
Other long-term debt		$ 3,116		$ 3,206
Percentage of Debt Hedged by Interest Rate Derivatives		100.00%	100.00%
Subsidiary Debt [Member] | BHE Pipeline Group [Member]
Debt Instrument [Line Items]
Par value		$ 5,705
Minimum [Member] | Subsidiary Debt [Member] | PacifiCorp [Member]
Debt Instrument [Line Items]
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate		0.14%	0.14%	1.60%
Minimum [Member] | Subsidiary Debt [Member] | Berkshire Hathaway Energy Renewables [Member]
Debt Instrument [Line Items]
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate		3.21%	3.21%
Maximum [Member] | Subsidiary Debt [Member] | PacifiCorp [Member]
Debt Instrument [Line Items]
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate		0.16%	0.16%	1.80%
Maximum [Member] | Subsidiary Debt [Member] | Berkshire Hathaway Energy Renewables [Member]
Debt Instrument [Line Items]
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate		5.41%	5.41%
Sierra Pacific Power Company [Member]
Debt Instrument [Line Items]
Par value		$ 1,167
Sierra Pacific Power Company [Member] | NV Energy [Member]
Debt Instrument [Line Items]
Par value		1,167
Other long-term debt		1,166		$ 1,136
Nevada Power Company [Member]
Debt Instrument [Line Items]
Par value		2,534
Nevada Power Company [Member] | NV Energy [Member]
Debt Instrument [Line Items]
Par value		2,534
Other long-term debt		2,507		2,364
Eastern Energy Gas Holdings, LLC [Member]
Debt Instrument [Line Items]
Par value		4,455
Eastern Energy Gas Holdings, LLC [Member] | BHE Pipeline Group [Member]
Debt Instrument [Line Items]
Par value		4,455
Other long-term debt		4,425		0
EEGH Variable Rate Senior Notes, due 2021 [Member] | Eastern Energy Gas Holdings, LLC [Member]
Debt Instrument [Line Items]
Par value		500
EEGH Variable Rate Senior Notes, due 2021 [Member] | Eastern Energy Gas Holdings, LLC [Member] | Subsidiary Debt [Member] | BHE Pipeline Group [Member]
Debt Instrument [Line Items]
Par value		500
Other long-term debt		$ 500		0
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate		3.46%	3.46%
Debt Instrument, Basis Spread on Variable Rate		0.60%
Percentage of Debt Hedged by Interest Rate Derivatives		100.00%	100.00%
EEGH 3.32% Senior Notes, due 2026 [Member] | Eastern Energy Gas Holdings, LLC [Member]
Debt Instrument [Line Items]
Par value		$ 305	€ 250
Debt Instrument, Interest Rate, Stated Percentage		3.32%	3.32%
EEGH 3.32% Senior Notes, due 2026 [Member] | Eastern Energy Gas Holdings, LLC [Member] | Subsidiary Debt [Member] | BHE Pipeline Group [Member]
Debt Instrument [Line Items]
Par value		$ 305	€ 250
Other long-term debt		$ 304		0
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate		3.32%	3.32%
Debt Instrument, Interest Rate, Stated Percentage		3.32%	3.32%
Percentage of Debt Hedged by Interest Rate Derivatives		100.00%	100.00%
Debt Instrument, Outstanding Principal Amount Including Swap Amount		$ 280
Water facilities refunding revenue bonds, series 2016G, due 2036 [Member] | Sierra Pacific Power Company [Member] | NV Energy [Member]
Debt Instrument [Line Items]
Par value	[3]	20
Water facilities refunding revenue bonds, series 2016G, due 2036 [Member] | Sierra Pacific Power Company [Member] | Subsidiary Debt [Member] | NV Energy [Member]
Debt Instrument [Line Items]
Par value		20
Other long-term debt		$ 20		$ 20
Debt Instrument, Interest Rate, Stated Percentage		1.85%	1.85%	1.85%
Water facilities refunding revenue bonds, series 2016F, due 2036 [Member] | Sierra Pacific Power Company [Member] | NV Energy [Member]
Debt Instrument [Line Items]
Par value	[3]	$ 75
Water facilities refunding revenue bonds, series 2016F, due 2036 [Member] | Sierra Pacific Power Company [Member] | Subsidiary Debt [Member] | NV Energy [Member]
Debt Instrument [Line Items]
Par value		75
Other long-term debt		$ 74		$ 74
Debt Instrument, Interest Rate, Stated Percentage		2.05%	2.05%	2.05%
Mortgage Securities, 2.400%, Series DD due 2030 [Member] | Nevada Power Company [Member] | NV Energy [Member]
Debt Instrument [Line Items]
Par value		$ 425
Mortgage Securities, 2.400%, Series DD due 2030 [Member] | Nevada Power Company [Member] | Subsidiary Debt [Member] | NV Energy [Member]
Debt Instrument [Line Items]
Par value		425
Other long-term debt		$ 422		$ 0
Debt Instrument, Interest Rate, Stated Percentage		2.40%	2.40%	2.40%
Mortgage Securities, 3.125%, Series EE due 2050 [Member] | Nevada Power Company [Member] | NV Energy [Member]
Debt Instrument [Line Items]
Par value		$ 300
Mortgage Securities, 3.125%, Series EE due 2050 [Member] | Nevada Power Company [Member] | Subsidiary Debt [Member] | NV Energy [Member]
Debt Instrument [Line Items]
Par value		300
Other long-term debt		$ 297		$ 0
Debt Instrument, Interest Rate, Stated Percentage		3.125%	3.125%	3.125%
NPC Pollution Control Refunding Revenue Bonds, 1.875%, Series 2017A, due 2032 | Nevada Power Company [Member] | NV Energy [Member]
Debt Instrument [Line Items]
Par value	[4]	$ 40
NPC Pollution Control Refunding Revenue Bonds, 1.875%, Series 2017A, due 2032 | Nevada Power Company [Member] | Subsidiary Debt [Member] | NV Energy [Member]
Debt Instrument [Line Items]
Par value		40
Other long-term debt		$ 39		$ 39
Debt Instrument, Interest Rate, Stated Percentage		1.875%	1.875%	1.875%
Pollution Control Refunding Revenue Bonds, 1.850%, Series 2016B, due 2029 [Member] | Sierra Pacific Power Company [Member] | NV Energy [Member]
Debt Instrument [Line Items]
Par value	[3]	$ 30
Pollution Control Refunding Revenue Bonds, 1.850%, Series 2016B, due 2029 [Member] | Sierra Pacific Power Company [Member] | Subsidiary Debt [Member] | NV Energy [Member]
Debt Instrument [Line Items]
Par value		30
Other long-term debt		$ 29		$ 29
Debt Instrument, Interest Rate, Stated Percentage		1.85%	1.85%	1.85%
Pinyon Pines I and II Term Loan, due 2034 [Member] | Subsidiary Debt [Member] | Berkshire Hathaway Energy Renewables [Member]
Debt Instrument [Line Items]
Par value	[5],[6]	$ 373
Other long-term debt	[5],[6]	$ 367		$ 284
Debt Instrument, Interest Rate, Stated Percentage				3.69%
Percentage of Debt Hedged by Interest Rate Derivatives		50.00%	50.00%	75.00%
Variable-rate bond, due 2026 [Member] | Subsidiary Debt [Member] | Northern Powergrid Holdings [Member]
Debt Instrument [Line Items]
Par value	[1],[7]	$ 186
Other long-term debt	[7]	$ 183		$ 214
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate		3.07%	3.07%
Debt Instrument, Interest Rate, Effective Percentage		2.96%	2.96%
Debt Instrument, Basis Spread on Variable Rate		2.00%
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate		2.03%	2.03%
Percentage of Debt Hedged by Interest Rate Derivatives		89.00%	89.00%
Variable-rate bond, due 2026, 100% variable | Subsidiary Debt [Member] | Northern Powergrid Holdings [Member]
Debt Instrument [Line Items]
Par value		$ 41
Other long-term debt		$ 41		$ 0
Debt Instrument, Basis Spread on Variable Rate		2.00%
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate		2.02%	2.02%
[1]	The par values for these debt instruments are denominated in sterling.
[2]	The par values for these debt instruments are denominated in Canadian dollars.
[3]	Subject to mandatory purchase by Sierra Pacific in April 2022 at which date the interest rate may be adjusted.
[4]	Bonds were purchased by Nevada Power in May 2020 and re-offered at a fixed interest rate. Subject to mandatory purchase by Nevada Power in March 2023 at which date the interest rate may be adjusted.
[5]	Amortizes quarterly or semiannually.
[6]	The term loans have variable interest rates based on LIBOR plus a margin that varies during the terms of the agreements. The Company has entered into interest rate swaps that fix the interest rate on 100% of the Pinyon Pines, TX Jumbo Road and Marshall Wind outstanding debt. The fixed interest rates as of December 31, 2020 and 2019 ranged from 3.21% to 5.41%. As of December 31, 2019, Pinyon Pines I and II had entered into interest rate swaps that fixed the interest rate on 75% of the Pinyon Pines outstanding debt through December 31, 2019 and 50% of the Pinyon Pines outstanding debt thereafter. The variable interest rate as of December 31, 2019 was 3.69%.
[7]	Amortizes semiannually and the Company has entered into an interest rate swap that fixes the interest rate on 89% of the outstanding debt. The variable interest rate as of December 31, 2020 was 2.03% (including 2.0% margin) and the fixed interest rate was 3.07% (including 2.0% margin), resulting in a blended rate of 2.96%. (3) Amortizes semiannually and is 100% variable based on LIBOR. The variable interest rate as of December 31, 2020 was 2.02% (including 2.0% margin).

Subsidiary Debt - Maturity Sche

Subsidiary Debt - Maturity Schedule (Details) $ in Millions	Dec. 31, 2020USD ($)
Debt Instrument [Line Items]
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months	$ 1,839
Long-term Debt, Maturities, Repayments of Principal in Year Two	1,848
Long-term Debt, Maturities, Repayments of Principal in Year Three	3,200
Long-term Debt, Maturities, Repayments of Principal in Year Four	2,710
Long-term Debt, Maturities, Repayments of Principal in Year Five	2,525
Long-term Debt, Maturities, Repayments of Principal after Year Five	37,637
Par Value	49,759
Subsidiary Debt [Member]
Debt Instrument [Line Items]
Par Value	36,108
PacifiCorp [Member] | Subsidiary Debt [Member]
Debt Instrument [Line Items]
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months	420
Long-term Debt, Maturities, Repayments of Principal in Year Two	605
Long-term Debt, Maturities, Repayments of Principal in Year Three	449
Long-term Debt, Maturities, Repayments of Principal in Year Four	591
Long-term Debt, Maturities, Repayments of Principal in Year Five	302
Long-term Debt, Maturities, Repayments of Principal after Year Five	6,300
Par Value	8,667
MidAmerican Funding [Member] | Subsidiary Debt [Member]
Debt Instrument [Line Items]
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months	0
Long-term Debt, Maturities, Repayments of Principal in Year Two	0
Long-term Debt, Maturities, Repayments of Principal in Year Three	315
Long-term Debt, Maturities, Repayments of Principal in Year Four	535
Long-term Debt, Maturities, Repayments of Principal in Year Five	13
Long-term Debt, Maturities, Repayments of Principal after Year Five	6,652
Par Value	7,515
NV Energy [Member]
Debt Instrument [Line Items]
Par Value	3,701
NV Energy [Member] | Subsidiary Debt [Member]
Debt Instrument [Line Items]
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months	0
Long-term Debt, Maturities, Repayments of Principal in Year Two	0
Long-term Debt, Maturities, Repayments of Principal in Year Three	250
Long-term Debt, Maturities, Repayments of Principal in Year Four	0
Long-term Debt, Maturities, Repayments of Principal in Year Five	0
Long-term Debt, Maturities, Repayments of Principal after Year Five	3,451
Par Value	3,701
Northern Powergrid Holdings [Member] | Subsidiary Debt [Member]
Debt Instrument [Line Items]
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months	40
Long-term Debt, Maturities, Repayments of Principal in Year Two	521
Long-term Debt, Maturities, Repayments of Principal in Year Three	42
Long-term Debt, Maturities, Repayments of Principal in Year Four	44
Long-term Debt, Maturities, Repayments of Principal in Year Five	319
Long-term Debt, Maturities, Repayments of Principal after Year Five	2,319
Par Value	3,285	[1]
BHE Pipeline Group [Member] | Subsidiary Debt [Member]
Debt Instrument [Line Items]
Par Value	5,705
BHE Transmission [Member] | Subsidiary Debt [Member]
Debt Instrument [Line Items]
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months	0
Long-term Debt, Maturities, Repayments of Principal in Year Two	374
Long-term Debt, Maturities, Repayments of Principal in Year Three	394
Long-term Debt, Maturities, Repayments of Principal in Year Four	280
Long-term Debt, Maturities, Repayments of Principal in Year Five	0
Long-term Debt, Maturities, Repayments of Principal after Year Five	2,849
Par Value	3,897	[2]
HomeServices [Member] | Subsidiary Debt [Member]
Debt Instrument [Line Items]
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months	33
Long-term Debt, Maturities, Repayments of Principal in Year Two	153
Long-term Debt, Maturities, Repayments of Principal in Year Three	0
Long-term Debt, Maturities, Repayments of Principal in Year Four	0
Long-term Debt, Maturities, Repayments of Principal in Year Five	0
Long-term Debt, Maturities, Repayments of Principal after Year Five	0
Par Value	186
Berkshire Hathaway Energy Renewables [Member] | Subsidiary Debt [Member]
Debt Instrument [Line Items]
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months	196
Long-term Debt, Maturities, Repayments of Principal in Year Two	195
Long-term Debt, Maturities, Repayments of Principal in Year Three	200
Long-term Debt, Maturities, Repayments of Principal in Year Four	210
Long-term Debt, Maturities, Repayments of Principal in Year Five	241
Long-term Debt, Maturities, Repayments of Principal after Year Five	2,110
Par Value	3,152
BHE Pipeline Group [Member]
Debt Instrument [Line Items]
Par Value	5,705
BHE Pipeline Group [Member] | Subsidiary Debt [Member]
Debt Instrument [Line Items]
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months	700
Long-term Debt, Maturities, Repayments of Principal in Year Two	0
Long-term Debt, Maturities, Repayments of Principal in Year Three	650
Long-term Debt, Maturities, Repayments of Principal in Year Four	1,050
Long-term Debt, Maturities, Repayments of Principal in Year Five	0
Long-term Debt, Maturities, Repayments of Principal after Year Five	3,305
Par Value	5,705
Berkshire Hathaway Energy [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months	450
Long-term Debt, Maturities, Repayments of Principal in Year Two	0
Long-term Debt, Maturities, Repayments of Principal in Year Three	900
Long-term Debt, Maturities, Repayments of Principal in Year Four	0
Long-term Debt, Maturities, Repayments of Principal in Year Five	1,650
Long-term Debt, Maturities, Repayments of Principal after Year Five	10,551
Par Value	13,551
Berkshire Hathaway Energy [Member] | Junior Subordinated Debt [Member]
Debt Instrument [Line Items]
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months	0
Long-term Debt, Maturities, Repayments of Principal in Year Two	0
Long-term Debt, Maturities, Repayments of Principal in Year Three	0
Long-term Debt, Maturities, Repayments of Principal in Year Four	0
Long-term Debt, Maturities, Repayments of Principal in Year Five	0
Long-term Debt, Maturities, Repayments of Principal after Year Five	100
Par Value	$ 100
[1]	The par values for these debt instruments are denominated in sterling.
[2]	The par values for these debt instruments are denominated in Canadian dollars.

Subsidiary Debt - Pacificorp (D

Subsidiary Debt - Pacificorp (Details) - USD ($) $ in Millions		Dec. 31, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Current portion of long-term debt		$ 1,839	$ 2,539
Par value		49,759
Long-term Debt		49,866	39,353
Regulatory Liability, Noncurrent		7,221	7,100
PacifiCorp [Member]
Debt Instrument [Line Items]
Current portion of long-term debt		420	38
Long-term Debt, Excluding Current Maturities		8,192	7,620
Long-term Debt		8,612	7,658
Maximum amount of additional long-term debt approved by regulators		3,000
Eligible Property Subject To Lien Of Mortgages		30,000
Regulatory Liability, Noncurrent		2,727	$ 2,913
PacifiCorp [Member] | Tax-exempt bond obligations, variable rate series, due 2020 [Member]
Debt Instrument [Line Items]
Par value		$ 0
Long-term Debt, Weighted Average Interest Rate, at Point in Time			1.78%
PacifiCorp [Member] | Tax-exempt bond obligations, variable rate series, due 2025 [Member]
Debt Instrument [Line Items]
Par value		$ 25
Long-term Debt, Weighted Average Interest Rate, at Point in Time		0.14%	1.75%
PacifiCorp [Member] | Variable-rate tax-exempt obligation series due 2024 to 2025 [Member]
Debt Instrument [Line Items]
Par value	[1]	$ 193
Long-term Debt, Weighted Average Interest Rate, at Point in Time		0.15%	1.70%
PacifiCorp [Member] | Long-term Debt [Member]
Debt Instrument [Line Items]
Par value		$ 8,667
Long-term Debt		8,612	$ 7,658
PacifiCorp [Member] | First Mortgage Bonds, 2.95% To 8.53%, Due Through 2025
Debt Instrument [Line Items]
Par value		$ 2,149
Long-term Debt, Weighted Average Interest Rate, at Point in Time		4.00%	4.00%
PacifiCorp [Member] | First Mortgage Bonds, 2.95% To 8.53%, Due Through 2025 | Minimum [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		2.95%
PacifiCorp [Member] | First Mortgage Bonds, 2.95% To 8.53%, Due Through 2025 | Maximum [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		8.53%
PacifiCorp [Member] | First Mortgage Bonds, 2.70% To 6.71%, Due 2026 to 2030
Debt Instrument [Line Items]
Par value		$ 900
Long-term Debt, Weighted Average Interest Rate, at Point in Time		3.50%	4.14%
PacifiCorp [Member] | First Mortgage Bonds, 2.70% To 6.71%, Due 2026 to 2030 | Minimum [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		2.70%
PacifiCorp [Member] | First Mortgage Bonds, 2.70% To 6.71%, Due 2026 to 2030 | Maximum [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		6.71%
PacifiCorp [Member] | First Mortgage Bonds, 5.25% to 7.70%, Due 2031 to 2035
Debt Instrument [Line Items]
Par value		$ 800
Long-term Debt, Weighted Average Interest Rate, at Point in Time		6.33%	6.33%
PacifiCorp [Member] | First Mortgage Bonds, 5.25% to 7.70%, Due 2031 to 2035 | Minimum [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		5.25%
PacifiCorp [Member] | First Mortgage Bonds, 5.25% to 7.70%, Due 2031 to 2035 | Maximum [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		7.70%
PacifiCorp [Member] | First Mortgage Bonds, 5.75% To 6.35%, Due 2036 to 2039
Debt Instrument [Line Items]
Par value		$ 2,500
Long-term Debt, Weighted Average Interest Rate, at Point in Time		6.06%	6.06%
PacifiCorp [Member] | First Mortgage Bonds, 5.75% To 6.35%, Due 2036 to 2039 | Minimum [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		5.75%
PacifiCorp [Member] | First Mortgage Bonds, 5.75% To 6.35%, Due 2036 to 2039 | Maximum [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		6.35%
PacifiCorp [Member] | First Mortgage Bonds, 4.10%, Due 2042
Debt Instrument [Line Items]
Par value		$ 300
Long-term Debt, Weighted Average Interest Rate, at Point in Time		4.10%	4.10%
PacifiCorp [Member] | First Mortgage Bonds, 4.10%, Due 2042 | Minimum [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		4.10%
PacifiCorp [Member] | First Mortgage Bonds, 3.30% to 4.15%, Due 2049 to 2051
Debt Instrument [Line Items]
Par value		$ 1,800
Long-term Debt, Weighted Average Interest Rate, at Point in Time		3.86%	4.14%
PacifiCorp [Member] | First Mortgage Bonds, 3.30% to 4.15%, Due 2049 to 2051 | Minimum [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		3.30%
PacifiCorp [Member] | First Mortgage Bonds, 3.30% to 4.15%, Due 2049 to 2051 | Maximum [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		4.15%
PacifiCorp [Member] | PacifiCorp [Member]
Debt Instrument [Line Items]
Par value		$ 8,667
Other long-term debt		8,612	$ 7,658
PacifiCorp [Member] | PacifiCorp [Member] | Tax-exempt bond obligations, variable rate series, due 2020 [Member]
Debt Instrument [Line Items]
Long-term Debt		0	38
PacifiCorp [Member] | PacifiCorp [Member] | Tax-exempt bond obligations, variable rate series, due 2025 [Member]
Debt Instrument [Line Items]
Long-term Debt		25	24
PacifiCorp [Member] | PacifiCorp [Member] | Variable-rate tax-exempt obligation series due 2024 to 2025 [Member]
Debt Instrument [Line Items]
Long-term Debt	[1]	193	193
PacifiCorp [Member] | PacifiCorp [Member] | First Mortgage Bonds, 2.95% To 8.53%, Due Through 2025
Debt Instrument [Line Items]
Long-term Debt		2,145	2,144
PacifiCorp [Member] | PacifiCorp [Member] | First Mortgage Bonds, 2.70% To 6.71%, Due 2026 to 2030
Debt Instrument [Line Items]
Long-term Debt		895	497
PacifiCorp [Member] | PacifiCorp [Member] | First Mortgage Bonds, 5.25% to 7.70%, Due 2031 to 2035
Debt Instrument [Line Items]
Long-term Debt		796	795
PacifiCorp [Member] | PacifiCorp [Member] | First Mortgage Bonds, 5.75% To 6.35%, Due 2036 to 2039
Debt Instrument [Line Items]
Long-term Debt		2,485	2,484
PacifiCorp [Member] | PacifiCorp [Member] | First Mortgage Bonds, 4.10%, Due 2042
Debt Instrument [Line Items]
Long-term Debt		297	297
PacifiCorp [Member] | PacifiCorp [Member] | First Mortgage Bonds, 3.30% to 4.15%, Due 2049 to 2051
Debt Instrument [Line Items]
Long-term Debt		1,776	1,186
Subsidiary Debt [Member]
Debt Instrument [Line Items]
Par value		36,108
Other long-term debt		36,319	30,672
Subsidiary Debt [Member] | PacifiCorp [Member]
Debt Instrument [Line Items]
Par value		8,667
Other long-term debt		$ 8,612	$ 7,658
Subsidiary Debt [Member] | PacifiCorp [Member] | Minimum [Member]
Debt Instrument [Line Items]
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate		0.14%	1.60%
Subsidiary Debt [Member] | PacifiCorp [Member] | Maximum [Member]
Debt Instrument [Line Items]
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate		0.16%	1.80%
Subsidiary Debt [Member] | PacifiCorp [Member] | First Mortgage Bonds, 2.95% To 8.53%, Due Through 2025 | Minimum [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		2.95%
Subsidiary Debt [Member] | PacifiCorp [Member] | First Mortgage Bonds, 2.95% To 8.53%, Due Through 2025 | Maximum [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		8.53%
Subsidiary Debt [Member] | PacifiCorp [Member] | First Mortgage Bonds, 2.70% To 6.71%, Due 2026 to 2030 | Minimum [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		2.70%
Subsidiary Debt [Member] | PacifiCorp [Member] | First Mortgage Bonds, 2.70% To 6.71%, Due 2026 to 2030 | Maximum [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		6.71%
Subsidiary Debt [Member] | PacifiCorp [Member] | First Mortgage Bonds, 5.75% To 6.35%, Due 2036 to 2039 | Minimum [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		5.75%
Subsidiary Debt [Member] | PacifiCorp [Member] | First Mortgage Bonds, 5.75% To 6.35%, Due 2036 to 2039 | Maximum [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		6.35%
Subsidiary Debt [Member] | PacifiCorp [Member] | First Mortgage Bonds, 4.10%, Due 2042 | Minimum [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		4.10%
[1]	Secured by pledged first mortgage bonds registered to and held by the tax-exempt bond trustee generally with the same interest rates, maturity dates and redemption provisions as the tax-exempt bond obligations.

Subsidiary Debt - PacifiCorp -

Subsidiary Debt - PacifiCorp - Annual Payment on Long-Term Debt (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months	$ 1,839
Long-term Debt, Maturities, Repayments of Principal in Year Two	1,848
Long-term Debt, Maturities, Repayments of Principal in Year Three	3,200
Long-term Debt, Maturities, Repayments of Principal in Year Four	2,710
Long-term Debt, Maturities, Repayments of Principal in Year Five	2,525
Long-term Debt, Maturities, Repayments of Principal after Year Five	37,637
Par value	49,759
Long-term Debt	49,866	$ 39,353
PacifiCorp [Member]
Debt Instrument [Line Items]
Long-term Debt	8,612	$ 7,658
PacifiCorp [Member] | Long-term Debt [Member]
Debt Instrument [Line Items]
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months	420
Long-term Debt, Maturities, Repayments of Principal in Year Two	605
Long-term Debt, Maturities, Repayments of Principal in Year Three	449
Long-term Debt, Maturities, Repayments of Principal in Year Four	591
Long-term Debt, Maturities, Repayments of Principal in Year Five	302
Long-term Debt, Maturities, Repayments of Principal after Year Five	6,300
Par value	8,667
Debt Instrument, Unamortized Premium, Discount and Debt Issuance Cost	(55)
Long-term Debt	$ 8,612

Subsidiary Debt - MEC (Details)

Subsidiary Debt - MEC (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Par value	$ 49,759
Restricted cash and cash equivalents	140	$ 212
Subsidiary Debt [Member]
Debt Instrument [Line Items]
Par value	36,108
Other long-term debt	36,319	30,672
MidAmerican Funding [Member] | Subsidiary Debt [Member]
Debt Instrument [Line Items]
Par value	7,515
Other long-term debt	7,431	7,427
MidAmerican Energy Company [Member]
Debt Instrument [Line Items]
Par value	7,276
Restricted cash and cash equivalents	7	43
Other long-term debt	7,210	7,208
MidAmerican Energy Company [Member] | MEC First Mortgage Bonds, 3.65%, Due April 2029 [Member]
Debt Instrument [Line Items]
Par value	850
Other long-term debt	$ 862	864
Debt Instrument, Interest Rate, Stated Percentage	3.65%
MidAmerican Energy Company [Member] | MEC First Mortgage Bonds, 4.25%, Due July 2049 [Member]
Debt Instrument [Line Items]
Par value	$ 900
Other long-term debt	$ 873	872
Debt Instrument, Interest Rate, Stated Percentage	4.25%
MidAmerican Energy Company [Member] | MEC First Mortgage Bonds, 3.15%, Due April 2050 [Member]
Debt Instrument [Line Items]
Par value	$ 600
Other long-term debt	$ 592	591
Debt Instrument, Interest Rate, Stated Percentage	3.15%
MidAmerican Energy Company [Member] | MEC First Mortgage Bonds, 3.70%, Due September 2023 [Member]
Debt Instrument [Line Items]
Par value	$ 250
Other long-term debt	$ 249	249
Debt Instrument, Interest Rate, Stated Percentage	3.70%
MidAmerican Energy Company [Member] | MEC First Mortgage Bonds, 3.50%, Due October 2024 [Member]
Debt Instrument [Line Items]
Par value	$ 500
Other long-term debt	$ 501	501
Debt Instrument, Interest Rate, Stated Percentage	3.50%
MidAmerican Energy Company [Member] | MEC First Mortgage Bonds, 3.10%, Due May 2027 [Member]
Debt Instrument [Line Items]
Par value	$ 375
Other long-term debt	$ 373	373
Debt Instrument, Interest Rate, Stated Percentage	3.10%
MidAmerican Energy Company [Member] | MEC First Mortgage Bonds, 4.80%, Due September 2043 [Member]
Debt Instrument [Line Items]
Par value	$ 350
Other long-term debt	$ 346	346
Debt Instrument, Interest Rate, Stated Percentage	4.80%
MidAmerican Energy Company [Member] | MEC First Mortgage Bonds, 4.40%, Due October 2044 [Member]
Debt Instrument [Line Items]
Par value	$ 400
Other long-term debt	$ 395	395
Debt Instrument, Interest Rate, Stated Percentage	4.40%
MidAmerican Energy Company [Member] | MEC First Mortgage Bonds, 4.25%, Due May 2046 [Member]
Debt Instrument [Line Items]
Par value	$ 450
Other long-term debt	$ 445	445
Debt Instrument, Interest Rate, Stated Percentage	4.25%
MidAmerican Energy Company [Member] | MEC First Mortgage Bonds, 3.95%, Due 2047 [Member]
Debt Instrument [Line Items]
Par value	$ 475
Other long-term debt	$ 470	470
Debt Instrument, Interest Rate, Stated Percentage	3.95%
MidAmerican Energy Company [Member] | MEC First Mortgage Bonds, 3.65, Due 2048 [Member]
Debt Instrument [Line Items]
Par value	$ 700
Other long-term debt	$ 689	688
Debt Instrument, Interest Rate, Stated Percentage	3.65%
MidAmerican Energy Company [Member] | MEC Notes, 6.75% Series, due 2031 [Member]
Debt Instrument [Line Items]
Par value	$ 400
Other long-term debt	$ 397	396
Debt Instrument, Interest Rate, Stated Percentage	6.75%
MidAmerican Energy Company [Member] | MEC Notes, 5.75% Series, due 2035 [Member]
Debt Instrument [Line Items]
Par value	$ 300
Other long-term debt	$ 298	298
Debt Instrument, Interest Rate, Stated Percentage	5.75%
MidAmerican Energy Company [Member] | MEC Notes, 5.8% Series, due 2036 [Member]
Debt Instrument [Line Items]
Par value	$ 350
Other long-term debt	$ 348	348
Debt Instrument, Interest Rate, Stated Percentage	5.80%
MidAmerican Energy Company [Member] | MEC Transmission Upgrade Obligations, 4.45% and 3.42% Due Through 2035 and 2036 [Member]
Debt Instrument [Line Items]
Par value	$ 6
Other long-term debt	$ 4	4
MidAmerican Energy Company [Member] | Tax-exempt bond obligations, variable rate, due 2016-2046 [Member]
Debt Instrument [Line Items]
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate	0.14%
MidAmerican Energy Company [Member] | Variable Rate Tax Exempt Obligation Series due 2023, issued 1993 [Member]
Debt Instrument [Line Items]
Par value	$ 7
Other long-term debt	7	7
MidAmerican Energy Company [Member] | Variable Rate Tax Exempt Obligation Series Due 2023, issued in 2008 [Member]
Debt Instrument [Line Items]
Par value	57
Other long-term debt	57	57
MidAmerican Energy Company [Member] | Variable-rate tax-exempt obligation series due 2024 [Member]
Debt Instrument [Line Items]
Par value	35
Other long-term debt	35	35
MidAmerican Energy Company [Member] | Variable-rate tax-exempt obligation series, due 2025 [Member]
Debt Instrument [Line Items]
Par value	13
Other long-term debt	13	13
MidAmerican Energy Company [Member] | Variable-rate tax-exempt obligation series, due 2036 [Member]
Debt Instrument [Line Items]
Par value	33
Other long-term debt	33	33
MidAmerican Energy Company [Member] | Variable-rate tax-exempt obligation series, due 2038 [Member]
Debt Instrument [Line Items]
Par value	45
Other long-term debt	45	45
MidAmerican Energy Company [Member] | Variable-rate tax-exempt obligation series, due 2046 [Member]
Debt Instrument [Line Items]
Par value	30
Other long-term debt	29	29
MidAmerican Energy Company [Member] | Variable Rate Tax Exempt Obligation Series Due 2047 [Member]
Debt Instrument [Line Items]
Par value	150
Other long-term debt	$ 149	$ 149
MidAmerican Energy Company [Member] | Tax-exempt bond obligations, variable rate, due 2016-2038 [Member]
Debt Instrument [Line Items]
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate		1.66%
MidAmerican Energy Company [Member] | Committed Common Equity Percentage To Regulators [Member]
Debt Instrument [Line Items]
Common equity to total capitalization percentage	42.00%
MidAmerican Energy Company [Member] | Committed Common Equity Percentage To Regulators Beyond Companies Control [Member]
Debt Instrument [Line Items]
Common equity to total capitalization percentage below which reasonable efforts to maintain agreed to percentage is not required	39.00%
MidAmerican Energy Company [Member] | Dividend Restriction For Common Equity Commitment [Member]
Debt Instrument [Line Items]
Amount Available for Dividend Distribution without Affecting Capital Adequacy Requirements	$ 2,800
MidAmerican Energy Company [Member] | Common Equity Level To Total Capitalization [Member]
Debt Instrument [Line Items]
Common Equity Level To Total Capitalization	52.00%
MidAmerican Energy Company [Member] | Maximum [Member] | MEC Transmission Upgrade Obligations, 4.45% and 3.42% Due Through 2035 and 2036 [Member]
Debt Instrument [Line Items]
Vendor Financing, Discount Rate Applied	4.45%
MidAmerican Energy Company [Member] | Minimum [Member] | MEC Transmission Upgrade Obligations, 4.45% and 3.42% Due Through 2035 and 2036 [Member]
Debt Instrument [Line Items]
Vendor Financing, Discount Rate Applied	3.42%
MidAmerican Energy Company [Member]
Debt Instrument [Line Items]
Eligible Property Subject To Lien Of Mortgages	$ 22,000
MidAmerican Energy Company [Member] | MEC First Mortgage Bonds, 3.65%, Due April 2029 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	3.65%
MidAmerican Energy Company [Member] | MEC First Mortgage Bonds, 4.25%, Due July 2049 [Member]
Debt Instrument [Line Items]
Par value	$ 900
Other long-term debt	$ 873	$ 872
Debt Instrument, Interest Rate, Stated Percentage	4.25%
MidAmerican Energy Company [Member] | MEC First Mortgage Bonds, 3.15%, Due April 2050 [Member]
Debt Instrument [Line Items]
Par value	$ 600
Other long-term debt	$ 592	591
Debt Instrument, Interest Rate, Stated Percentage	3.15%
MidAmerican Energy Company [Member] | MidAmerican Funding [Member] | Subsidiary Debt [Member]
Debt Instrument [Line Items]
Par value	$ 7,276
Other long-term debt	7,210	7,208
MidAmerican Energy Company [Member] | MidAmerican Funding [Member] | Subsidiary Debt [Member] | MEC First Mortgage Bonds, 3.65%, Due April 2029 [Member]
Debt Instrument [Line Items]
Par value	850
Other long-term debt	862	864
MidAmerican Energy Company [Member] | MidAmerican Funding [Member] | Subsidiary Debt [Member] | Tax-exempt bond obligations, variable rate, due 2023-2047 [Member]
Debt Instrument [Line Items]
Par value	370
Other long-term debt	$ 368	$ 368
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate	0.14%	1.66%
MidAmerican Energy Company [Member] | MidAmerican Funding [Member] | Subsidiary Debt [Member] | MEC First Mortgage Bonds, 3.70%, Due September 2023 [Member]
Debt Instrument [Line Items]
Par value	$ 250
Other long-term debt	$ 249	$ 249
Debt Instrument, Interest Rate, Stated Percentage	3.70%
MidAmerican Energy Company [Member] | MidAmerican Funding [Member] | Subsidiary Debt [Member] | MEC First Mortgage Bonds, 3.50%, Due October 2024 [Member]
Debt Instrument [Line Items]
Par value	$ 500
Other long-term debt	$ 501	501
Debt Instrument, Interest Rate, Stated Percentage	3.50%
MidAmerican Energy Company [Member] | MidAmerican Funding [Member] | Subsidiary Debt [Member] | MEC First Mortgage Bonds, 3.10%, Due May 2027 [Member]
Debt Instrument [Line Items]
Par value	$ 375
Other long-term debt	$ 373	373
Debt Instrument, Interest Rate, Stated Percentage	3.10%
MidAmerican Energy Company [Member] | MidAmerican Funding [Member] | Subsidiary Debt [Member] | MEC First Mortgage Bonds, 4.80%, Due September 2043 [Member]
Debt Instrument [Line Items]
Par value	$ 350
Other long-term debt	$ 346	346
Debt Instrument, Interest Rate, Stated Percentage	4.80%
MidAmerican Energy Company [Member] | MidAmerican Funding [Member] | Subsidiary Debt [Member] | MEC First Mortgage Bonds, 4.40%, Due October 2044 [Member]
Debt Instrument [Line Items]
Par value	$ 400
Other long-term debt	$ 395	395
Debt Instrument, Interest Rate, Stated Percentage	4.40%
MidAmerican Energy Company [Member] | MidAmerican Funding [Member] | Subsidiary Debt [Member] | MEC First Mortgage Bonds, 4.25%, Due May 2046 [Member]
Debt Instrument [Line Items]
Par value	$ 450
Other long-term debt	$ 445	445
Debt Instrument, Interest Rate, Stated Percentage	4.25%
MidAmerican Energy Company [Member] | MidAmerican Funding [Member] | Subsidiary Debt [Member] | MEC First Mortgage Bonds, 3.95%, Due 2047 [Member]
Debt Instrument [Line Items]
Par value	$ 475
Other long-term debt	$ 470	470
Debt Instrument, Interest Rate, Stated Percentage	3.95%
MidAmerican Energy Company [Member] | MidAmerican Funding [Member] | Subsidiary Debt [Member] | MEC First Mortgage Bonds, 3.65, Due 2048 [Member]
Debt Instrument [Line Items]
Par value	$ 700
Other long-term debt	$ 689	688
Debt Instrument, Interest Rate, Stated Percentage	3.65%
MidAmerican Energy Company [Member] | MidAmerican Funding [Member] | Subsidiary Debt [Member] | MEC Notes, 6.75% Series, due 2031 [Member]
Debt Instrument [Line Items]
Par value	$ 400
Other long-term debt	$ 397	396
Debt Instrument, Interest Rate, Stated Percentage	6.75%
MidAmerican Energy Company [Member] | MidAmerican Funding [Member] | Subsidiary Debt [Member] | MEC Notes, 5.75% Series, due 2035 [Member]
Debt Instrument [Line Items]
Par value	$ 300
Other long-term debt	$ 298	298
Debt Instrument, Interest Rate, Stated Percentage	5.75%
MidAmerican Energy Company [Member] | MidAmerican Funding [Member] | Subsidiary Debt [Member] | MEC Notes, 5.8% Series, due 2036 [Member]
Debt Instrument [Line Items]
Par value	$ 350
Other long-term debt	$ 348	348
Debt Instrument, Interest Rate, Stated Percentage	5.80%
MidAmerican Energy Company [Member] | MidAmerican Funding [Member] | Subsidiary Debt [Member] | MEC Transmission Upgrade Obligations, 4.45% and 3.42% Due Through 2035 and 2036 [Member]
Debt Instrument [Line Items]
Par value	$ 6
Other long-term debt	4	4
MidAmerican Energy Company [Member] | MidAmerican Funding [Member] | Subsidiary Debt [Member] | Secured Debt [Member]
Debt Instrument [Line Items]
Par value	$ 180
MidAmerican Energy Company [Member] | MidAmerican Funding [Member] | Maximum [Member] | Subsidiary Debt [Member] | MEC Transmission Upgrade Obligations, 4.45% and 3.42% Due Through 2035 and 2036 [Member]
Debt Instrument [Line Items]
Vendor Financing, Discount Rate Applied	4.45%
MidAmerican Energy Company [Member] | MidAmerican Funding [Member] | Minimum [Member] | Subsidiary Debt [Member] | MEC Transmission Upgrade Obligations, 4.45% and 3.42% Due Through 2035 and 2036 [Member]
Debt Instrument [Line Items]
Vendor Financing, Discount Rate Applied	3.42%
MidAmerican Funding LLC [Member] | MidAmerican Funding [Member] | Subsidiary Debt [Member] | Senior Notes, 6.927%, due 2029 [Member]
Debt Instrument [Line Items]
Par value	$ 239
Other long-term debt	$ 221	$ 219
Debt Instrument, Interest Rate, Stated Percentage	6.927%

Subsidiary Debt - MEC - Maturit

Subsidiary Debt - MEC - Maturity Schedule (Details) $ in Millions	Dec. 31, 2020USD ($)
Debt Instrument [Line Items]
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months	$ 1,839
Long-term Debt, Maturities, Repayments of Principal in Year Two	1,848
Long-term Debt, Maturities, Repayments of Principal in Year Three	3,200
Long-term Debt, Maturities, Repayments of Principal in Year Four	2,710
Long-term Debt, Maturities, Repayments of Principal in Year Five	2,525
Long-term Debt, Maturities, Repayments of Principal after Year Five	37,637
MidAmerican Energy Company [Member]
Debt Instrument [Line Items]
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months	0
Long-term Debt, Maturities, Repayments of Principal in Year Two	0
Long-term Debt, Maturities, Repayments of Principal in Year Three	315
Long-term Debt, Maturities, Repayments of Principal in Year Four	535
Long-term Debt, Maturities, Repayments of Principal in Year Five	13
Long-term Debt, Maturities, Repayments of Principal after Year Five	$ 6,413

Subsidiary Debt - MidAmerican F

Subsidiary Debt - MidAmerican Funding (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Par value	$ 49,759
Equity Restrictions	14,700
Subsidiary Debt [Member]
Debt Instrument [Line Items]
Par value	36,108
Other long-term debt	36,319	$ 30,672
MidAmerican Funding [Member] | Subsidiary Debt [Member]
Debt Instrument [Line Items]
Par value	7,515
Other long-term debt	7,431	7,427
MidAmerican Energy Company [Member]
Debt Instrument [Line Items]
Par value	7,276
Other long-term debt	7,210	7,208
MidAmerican Energy Company [Member] | MEC First Mortgage Bonds, 3.65%, Due April 2029 [Member]
Debt Instrument [Line Items]
Par value	850
Other long-term debt	$ 862	864
Debt Instrument, Interest Rate, Stated Percentage	3.65%
MidAmerican Energy Company [Member] | MEC First Mortgage Bonds, 4.25%, Due July 2049 [Member]
Debt Instrument [Line Items]
Par value	$ 900
Other long-term debt	$ 873	872
Debt Instrument, Interest Rate, Stated Percentage	4.25%
MidAmerican Energy Company [Member] | MEC First Mortgage Bonds, 3.15%, Due April 2050 [Member]
Debt Instrument [Line Items]
Par value	$ 600
Other long-term debt	$ 592	591
Debt Instrument, Interest Rate, Stated Percentage	3.15%
MidAmerican Energy Company [Member] | MEC First Mortgage Bonds, 3.70%, Due September 2023 [Member]
Debt Instrument [Line Items]
Par value	$ 250
Other long-term debt	$ 249	249
Debt Instrument, Interest Rate, Stated Percentage	3.70%
MidAmerican Energy Company [Member] | MEC First Mortgage Bonds, 3.50%, Due October 2024 [Member]
Debt Instrument [Line Items]
Par value	$ 500
Other long-term debt	$ 501	501
Debt Instrument, Interest Rate, Stated Percentage	3.50%
MidAmerican Energy Company [Member] | MEC First Mortgage Bonds, 3.10%, Due May 2027 [Member]
Debt Instrument [Line Items]
Par value	$ 375
Other long-term debt	$ 373	373
Debt Instrument, Interest Rate, Stated Percentage	3.10%
MidAmerican Energy Company [Member] | MEC First Mortgage Bonds, 4.80%, Due September 2043 [Member]
Debt Instrument [Line Items]
Par value	$ 350
Other long-term debt	$ 346	346
Debt Instrument, Interest Rate, Stated Percentage	4.80%
MidAmerican Energy Company [Member] | MEC First Mortgage Bonds, 4.40%, Due October 2044 [Member]
Debt Instrument [Line Items]
Par value	$ 400
Other long-term debt	$ 395	395
Debt Instrument, Interest Rate, Stated Percentage	4.40%
MidAmerican Energy Company [Member] | MEC First Mortgage Bonds, 4.25%, Due May 2046 [Member]
Debt Instrument [Line Items]
Par value	$ 450
Other long-term debt	$ 445	445
Debt Instrument, Interest Rate, Stated Percentage	4.25%
MidAmerican Energy Company [Member] | MEC First Mortgage Bonds, 3.95%, Due 2047 [Member]
Debt Instrument [Line Items]
Par value	$ 475
Other long-term debt	$ 470	470
Debt Instrument, Interest Rate, Stated Percentage	3.95%
MidAmerican Energy Company [Member] | MEC First Mortgage Bonds, 3.65, Due 2048 [Member]
Debt Instrument [Line Items]
Par value	$ 700
Other long-term debt	$ 689	688
Debt Instrument, Interest Rate, Stated Percentage	3.65%
MidAmerican Energy Company [Member] | MEC Notes, 6.75% Series, due 2031 [Member]
Debt Instrument [Line Items]
Par value	$ 400
Other long-term debt	$ 397	396
Debt Instrument, Interest Rate, Stated Percentage	6.75%
MidAmerican Energy Company [Member] | MEC Notes, 5.75% Series, due 2035 [Member]
Debt Instrument [Line Items]
Par value	$ 300
Other long-term debt	$ 298	298
Debt Instrument, Interest Rate, Stated Percentage	5.75%
MidAmerican Energy Company [Member] | MEC Notes, 5.8% Series, due 2036 [Member]
Debt Instrument [Line Items]
Par value	$ 350
Other long-term debt	$ 348	348
Debt Instrument, Interest Rate, Stated Percentage	5.80%
MidAmerican Energy Company [Member] | MEC Transmission Upgrade Obligations, 4.45% and 3.42% Due Through 2035 and 2036 [Member]
Debt Instrument [Line Items]
Par value	$ 6
Other long-term debt	4	4
MidAmerican Funding, LLC and Subsidiaries [Member]
Debt Instrument [Line Items]
Equity Restrictions	5,200
MidAmerican Funding LLC [Member] | MidAmerican Funding [Member] | Subsidiary Debt [Member] | Senior Notes, 6.927%, due 2029 [Member]
Debt Instrument [Line Items]
Par value	239
Other long-term debt	$ 221	219
Debt Instrument, Interest Rate, Stated Percentage	6.927%
MidAmerican Energy Company [Member]
Debt Instrument [Line Items]
Eligible Property Subject To Lien Of Mortgages	$ 22,000
MidAmerican Energy Company [Member] | MEC First Mortgage Bonds, 3.65%, Due April 2029 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	3.65%
MidAmerican Energy Company [Member] | MEC First Mortgage Bonds, 4.25%, Due July 2049 [Member]
Debt Instrument [Line Items]
Par value	$ 900
Other long-term debt	$ 873	872
Debt Instrument, Interest Rate, Stated Percentage	4.25%
MidAmerican Energy Company [Member] | MEC First Mortgage Bonds, 3.15%, Due April 2050 [Member]
Debt Instrument [Line Items]
Par value	$ 600
Other long-term debt	$ 592	591
Debt Instrument, Interest Rate, Stated Percentage	3.15%
MidAmerican Energy Company [Member] | MidAmerican Funding [Member] | Subsidiary Debt [Member]
Debt Instrument [Line Items]
Par value	$ 7,276
Other long-term debt	7,210	7,208
MidAmerican Energy Company [Member] | MidAmerican Funding [Member] | Subsidiary Debt [Member] | MEC First Mortgage Bonds, 3.65%, Due April 2029 [Member]
Debt Instrument [Line Items]
Par value	850
Other long-term debt	862	864
MidAmerican Energy Company [Member] | MidAmerican Funding [Member] | Subsidiary Debt [Member] | Tax-exempt bond obligations, variable rate, due 2023-2047 [Member]
Debt Instrument [Line Items]
Par value	370
Other long-term debt	$ 368	$ 368
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate	0.14%	1.66%
MidAmerican Energy Company [Member] | MidAmerican Funding [Member] | Subsidiary Debt [Member] | MEC First Mortgage Bonds, 3.70%, Due September 2023 [Member]
Debt Instrument [Line Items]
Par value	$ 250
Other long-term debt	$ 249	$ 249
Debt Instrument, Interest Rate, Stated Percentage	3.70%
MidAmerican Energy Company [Member] | MidAmerican Funding [Member] | Subsidiary Debt [Member] | MEC First Mortgage Bonds, 3.50%, Due October 2024 [Member]
Debt Instrument [Line Items]
Par value	$ 500
Other long-term debt	$ 501	501
Debt Instrument, Interest Rate, Stated Percentage	3.50%
MidAmerican Energy Company [Member] | MidAmerican Funding [Member] | Subsidiary Debt [Member] | MEC First Mortgage Bonds, 3.10%, Due May 2027 [Member]
Debt Instrument [Line Items]
Par value	$ 375
Other long-term debt	$ 373	373
Debt Instrument, Interest Rate, Stated Percentage	3.10%
MidAmerican Energy Company [Member] | MidAmerican Funding [Member] | Subsidiary Debt [Member] | MEC First Mortgage Bonds, 4.80%, Due September 2043 [Member]
Debt Instrument [Line Items]
Par value	$ 350
Other long-term debt	$ 346	346
Debt Instrument, Interest Rate, Stated Percentage	4.80%
MidAmerican Energy Company [Member] | MidAmerican Funding [Member] | Subsidiary Debt [Member] | MEC First Mortgage Bonds, 4.40%, Due October 2044 [Member]
Debt Instrument [Line Items]
Par value	$ 400
Other long-term debt	$ 395	395
Debt Instrument, Interest Rate, Stated Percentage	4.40%
MidAmerican Energy Company [Member] | MidAmerican Funding [Member] | Subsidiary Debt [Member] | MEC First Mortgage Bonds, 4.25%, Due May 2046 [Member]
Debt Instrument [Line Items]
Par value	$ 450
Other long-term debt	$ 445	445
Debt Instrument, Interest Rate, Stated Percentage	4.25%
MidAmerican Energy Company [Member] | MidAmerican Funding [Member] | Subsidiary Debt [Member] | MEC First Mortgage Bonds, 3.95%, Due 2047 [Member]
Debt Instrument [Line Items]
Par value	$ 475
Other long-term debt	$ 470	470
Debt Instrument, Interest Rate, Stated Percentage	3.95%
MidAmerican Energy Company [Member] | MidAmerican Funding [Member] | Subsidiary Debt [Member] | MEC First Mortgage Bonds, 3.65, Due 2048 [Member]
Debt Instrument [Line Items]
Par value	$ 700
Other long-term debt	$ 689	688
Debt Instrument, Interest Rate, Stated Percentage	3.65%
MidAmerican Energy Company [Member] | MidAmerican Funding [Member] | Subsidiary Debt [Member] | MEC Notes, 6.75% Series, due 2031 [Member]
Debt Instrument [Line Items]
Par value	$ 400
Other long-term debt	$ 397	396
Debt Instrument, Interest Rate, Stated Percentage	6.75%
MidAmerican Energy Company [Member] | MidAmerican Funding [Member] | Subsidiary Debt [Member] | MEC Notes, 5.75% Series, due 2035 [Member]
Debt Instrument [Line Items]
Par value	$ 300
Other long-term debt	$ 298	298
Debt Instrument, Interest Rate, Stated Percentage	5.75%
MidAmerican Energy Company [Member] | MidAmerican Funding [Member] | Subsidiary Debt [Member] | MEC Notes, 5.8% Series, due 2036 [Member]
Debt Instrument [Line Items]
Par value	$ 350
Other long-term debt	$ 348	348
Debt Instrument, Interest Rate, Stated Percentage	5.80%
MidAmerican Energy Company [Member] | MidAmerican Funding [Member] | Subsidiary Debt [Member] | MEC Transmission Upgrade Obligations, 4.45% and 3.42% Due Through 2035 and 2036 [Member]
Debt Instrument [Line Items]
Par value	$ 6
Other long-term debt	4	4
MidAmerican Energy Company [Member] | MidAmerican Funding [Member] | Subsidiary Debt [Member] | Secured Debt [Member]
Debt Instrument [Line Items]
Par value	180
MidAmerican Funding LLC [Member] | MidAmerican Funding LLC [Member] | Senior Notes, 6.927%, due 2029 [Member]
Debt Instrument [Line Items]
Par value	239
Other long-term debt	$ 240	$ 240
Debt Instrument, Interest Rate, Stated Percentage	6.927%
Minimum [Member] | MidAmerican Energy Company [Member] | MEC Transmission Upgrade Obligations, 4.45% and 3.42% Due Through 2035 and 2036 [Member]
Debt Instrument [Line Items]
Vendor Financing, Discount Rate Applied	3.42%
Minimum [Member] | MidAmerican Energy Company [Member] | MidAmerican Funding [Member] | Subsidiary Debt [Member] | MEC Transmission Upgrade Obligations, 4.45% and 3.42% Due Through 2035 and 2036 [Member]
Debt Instrument [Line Items]
Vendor Financing, Discount Rate Applied	3.42%
Maximum [Member] | MidAmerican Energy Company [Member] | MEC Transmission Upgrade Obligations, 4.45% and 3.42% Due Through 2035 and 2036 [Member]
Debt Instrument [Line Items]
Vendor Financing, Discount Rate Applied	4.45%
Maximum [Member] | MidAmerican Energy Company [Member] | MidAmerican Funding [Member] | Subsidiary Debt [Member] | MEC Transmission Upgrade Obligations, 4.45% and 3.42% Due Through 2035 and 2036 [Member]
Debt Instrument [Line Items]
Vendor Financing, Discount Rate Applied	4.45%
Committed Common Equity Percentage To Regulators Beyond Companies Control [Member] | MidAmerican Energy Company [Member]
Debt Instrument [Line Items]
Common equity to total capitalization percentage below which reasonable efforts to maintain agreed to percentage is not required	39.00%

Subsidiary Debt - NV Energy (De

Subsidiary Debt - NV Energy (Details) - USD ($) $ in Millions		Dec. 31, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Par value		$ 49,759
Subsidiary Debt [Member]
Debt Instrument [Line Items]
Par value		36,108
Other long-term debt		36,319	$ 30,672
PacifiCorp [Member] | Subsidiary Debt [Member]
Debt Instrument [Line Items]
Par value		8,667
Other long-term debt		8,612	7,658
Northern Powergrid Holdings [Member] | Subsidiary Debt [Member]
Debt Instrument [Line Items]
Par value	[1]	3,285
Other long-term debt		3,259	3,221
Northern Powergrid Holdings [Member] | Subsidiary Debt [Member] | European Investment Bank loans, 2.564%, due 2027 [Member]
Debt Instrument [Line Items]
Par value	[1]	342
Other long-term debt		$ 340	330
Debt Instrument, Interest Rate, Stated Percentage		2.564%
MidAmerican Funding [Member] | Subsidiary Debt [Member]
Debt Instrument [Line Items]
Par value		$ 7,515
Other long-term debt		7,431	7,427
NV Energy [Member]
Debt Instrument [Line Items]
Par value		3,701
Other long-term debt		3,673	3,821
NV Energy [Member] | Subsidiary Debt [Member]
Debt Instrument [Line Items]
Par value		3,701
Other long-term debt		3,673	3,821
BHE Pipeline Group [Member]
Debt Instrument [Line Items]
Par value		5,705
Other long-term debt		6,165	1,247
BHE Pipeline Group [Member] | Subsidiary Debt [Member]
Debt Instrument [Line Items]
Par value		5,705
HomeServices [Member] | Subsidiary Debt [Member]
Debt Instrument [Line Items]
Par value		186
Other long-term debt		$ 186	$ 213
Minimum [Member] | PacifiCorp [Member] | Subsidiary Debt [Member]
Debt Instrument [Line Items]
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate		0.14%	1.60%
Maximum [Member] | PacifiCorp [Member] | Subsidiary Debt [Member]
Debt Instrument [Line Items]
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate		0.16%	1.80%
MidAmerican Energy Company [Member]
Debt Instrument [Line Items]
Eligible Property Subject To Lien Of Mortgages		$ 22,000
MidAmerican Energy Company [Member] | MidAmerican Funding [Member] | Subsidiary Debt [Member]
Debt Instrument [Line Items]
Par value		7,276
Other long-term debt		7,210	$ 7,208
MidAmerican Energy Company [Member] | MidAmerican Funding [Member] | Subsidiary Debt [Member] | Tax-exempt bond obligations, variable rate, due 2023-2047 [Member]
Debt Instrument [Line Items]
Par value		370
Other long-term debt		$ 368	$ 368
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate		0.14%	1.66%
MidAmerican Energy Company [Member] | MidAmerican Funding [Member] | Subsidiary Debt [Member] | MEC First Mortgage Bonds, 3.50%, Due October 2024 [Member]
Debt Instrument [Line Items]
Par value		$ 500
Other long-term debt		$ 501	$ 501
Debt Instrument, Interest Rate, Stated Percentage		3.50%
MidAmerican Energy Company [Member] | MidAmerican Funding [Member] | Subsidiary Debt [Member] | MEC First Mortgage Bonds, 4.25%, Due May 2046 [Member]
Debt Instrument [Line Items]
Par value		$ 450
Other long-term debt		$ 445	445
Debt Instrument, Interest Rate, Stated Percentage		4.25%
MidAmerican Energy Company [Member] | MidAmerican Funding [Member] | Subsidiary Debt [Member] | MEC First Mortgage Bonds, 3.95%, Due 2047 [Member]
Debt Instrument [Line Items]
Par value		$ 475
Other long-term debt		$ 470	470
Debt Instrument, Interest Rate, Stated Percentage		3.95%
MidAmerican Energy Company [Member] | MidAmerican Funding [Member] | Subsidiary Debt [Member] | MEC First Mortgage Bonds, 3.10%, Due May 2027 [Member]
Debt Instrument [Line Items]
Par value		$ 375
Other long-term debt		$ 373	373
Debt Instrument, Interest Rate, Stated Percentage		3.10%
MidAmerican Energy Company [Member] | MidAmerican Funding [Member] | Subsidiary Debt [Member] | MEC First Mortgage Bonds, 3.65, Due 2048 [Member]
Debt Instrument [Line Items]
Par value		$ 700
Other long-term debt		$ 689	688
Debt Instrument, Interest Rate, Stated Percentage		3.65%
NV Energy, Inc. [Member] | NV Energy [Member] | Subsidiary Debt [Member] | Senior Notes, 6.250%, due 2020 [Member]
Debt Instrument [Line Items]
Par value		$ 0
Other long-term debt		$ 0	321
Debt Instrument, Interest Rate, Stated Percentage		6.25%
Nevada Power Company [Member]
Debt Instrument [Line Items]
Par value		$ 2,534
Eligible Property Subject To Lien Of Mortgages		9,100
Nevada Power Company [Member] | NV Energy [Member]
Debt Instrument [Line Items]
Par value		2,534
Other long-term debt		2,507	2,364
Nevada Power Company [Member] | NV Energy [Member] | Mortgage Securities, 2.750%, Series BB due 2020 [Member]
Debt Instrument [Line Items]
Par value		0
Nevada Power Company [Member] | NV Energy [Member] | Mortgage Securities, 3.700%, Series CC due 2029 [Member]
Debt Instrument [Line Items]
Par value		500
Nevada Power Company [Member] | NV Energy [Member] | Mortgage Securities, 6.650%, Series N due 2036 [Member]
Debt Instrument [Line Items]
Par value		367
Nevada Power Company [Member] | NV Energy [Member] | Mortgage Securities, 6.750%, Series R due 2037 [Member]
Debt Instrument [Line Items]
Par value		349
Nevada Power Company [Member] | NV Energy [Member] | Mortgage Securities, 5.375%, Series X due 2040 [Member]
Debt Instrument [Line Items]
Par value		250
Nevada Power Company [Member] | NV Energy [Member] | Mortgage Securities, 5.450%, Series Y due 2041 [Member]
Debt Instrument [Line Items]
Par value		250
Nevada Power Company [Member] | NV Energy [Member] | Subsidiary Debt [Member] | Mortgage Securities, 2.750%, Series BB due 2020 [Member]
Debt Instrument [Line Items]
Par value		0
Other long-term debt		$ 0	$ 575
Debt Instrument, Interest Rate, Stated Percentage		2.75%	2.75%
Nevada Power Company [Member] | NV Energy [Member] | Subsidiary Debt [Member] | Mortgage Securities, 3.700%, Series CC due 2029 [Member]
Debt Instrument [Line Items]
Par value		$ 500
Other long-term debt		$ 496	$ 496
Debt Instrument, Interest Rate, Stated Percentage		3.70%	3.70%
Nevada Power Company [Member] | NV Energy [Member] | Subsidiary Debt [Member] | Mortgage Securities, 6.650%, Series N due 2036 [Member]
Debt Instrument [Line Items]
Par value		$ 367
Other long-term debt		$ 361	$ 360
Debt Instrument, Interest Rate, Stated Percentage		6.65%	6.65%
Nevada Power Company [Member] | NV Energy [Member] | Subsidiary Debt [Member] | Mortgage Securities, 6.750%, Series R due 2037 [Member]
Debt Instrument [Line Items]
Par value		$ 349
Other long-term debt		$ 347	$ 348
Debt Instrument, Interest Rate, Stated Percentage		6.75%	6.75%
Nevada Power Company [Member] | NV Energy [Member] | Subsidiary Debt [Member] | Mortgage Securities, 5.375%, Series X due 2040 [Member]
Debt Instrument [Line Items]
Par value		$ 250
Other long-term debt		$ 249	$ 249
Debt Instrument, Interest Rate, Stated Percentage		5.375%	5.375%
Nevada Power Company [Member] | NV Energy [Member] | Subsidiary Debt [Member] | Mortgage Securities, 5.450%, Series Y due 2041 [Member]
Debt Instrument [Line Items]
Par value		$ 250
Other long-term debt		$ 244	$ 245
Debt Instrument, Interest Rate, Stated Percentage		5.45%	5.45%
Nevada Power Company [Member] | NV Energy [Member] | Subsidiary Debt [Member] | NPC Pollution Control Refunding Revenue Bonds, 1.80%, Series 2017A, due 2032 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		1.875%
Nevada Power Company [Member] | NV Energy [Member] | Subsidiary Debt [Member] | NPC Pollution Control Refunding Revenue Bonds, 1.60%, Series 2017, Due 2036 [Member]
Debt Instrument [Line Items]
Par value		$ 40
Other long-term debt		$ 39	$ 39
Debt Instrument, Interest Rate, Stated Percentage		1.65%
Nevada Power Company [Member] | NV Energy [Member] | Subsidiary Debt [Member] | NPC Pollution Control Refunding Revenue Bonds, 1.60%, Series 2017B, due 2039 [Member]
Debt Instrument [Line Items]
Par value		$ 13
Other long-term debt		$ 13	13
Debt Instrument, Interest Rate, Stated Percentage		1.65%
Sierra Pacific Power Company [Member]
Debt Instrument [Line Items]
Par value		$ 1,167
Eligible Property Subject To Lien Of Mortgages		4,300
Sierra Pacific Power Company [Member] | NV Energy [Member]
Debt Instrument [Line Items]
Par value		1,167
Other long-term debt		1,166	1,136
Sierra Pacific Power Company [Member] | NV Energy [Member] | Mortgage securities, 3.375%, Series T due 2023 [Member]
Debt Instrument [Line Items]
Par value		250
Sierra Pacific Power Company [Member] | NV Energy [Member] | Mortgage securities, 2.600%, Series U due 2026 [Member]
Debt Instrument [Line Items]
Par value		400
Sierra Pacific Power Company [Member] | NV Energy [Member] | Mortgage securities, 6.750%, Series P due 2037 [Member]
Debt Instrument [Line Items]
Par value		252
Sierra Pacific Power Company [Member] | NV Energy [Member] | Gas and water facilities refunding revenue bonds, 3.000% series 2016B, due 2036 [Member]
Debt Instrument [Line Items]
Par value	[2]	60
Sierra Pacific Power Company [Member] | NV Energy [Member] | Water facilities refunding revenue bonds, series 2016C, due 2036 [Member]
Debt Instrument [Line Items]
Par value	[3]	30
Sierra Pacific Power Company [Member] | NV Energy [Member] | Water facilities refunding revenue bonds, series 2016D, due 2036 [Member]
Debt Instrument [Line Items]
Par value	[4],[5]	25
Sierra Pacific Power Company [Member] | NV Energy [Member] | Water facilities refunding revenue bonds, series 2016E, due 2036 [Member]
Debt Instrument [Line Items]
Par value	[4],[5]	25
Sierra Pacific Power Company [Member] | NV Energy [Member] | Subsidiary Debt [Member] | Mortgage securities, 3.375%, Series T due 2023 [Member]
Debt Instrument [Line Items]
Par value		250
Other long-term debt		$ 249	$ 249
Debt Instrument, Interest Rate, Stated Percentage		3.375%	3.375%
Sierra Pacific Power Company [Member] | NV Energy [Member] | Subsidiary Debt [Member] | Mortgage securities, 2.600%, Series U due 2026 [Member]
Debt Instrument [Line Items]
Par value		$ 400
Other long-term debt		$ 397	$ 396
Debt Instrument, Interest Rate, Stated Percentage		2.60%	2.60%
Sierra Pacific Power Company [Member] | NV Energy [Member] | Subsidiary Debt [Member] | Mortgage securities, 6.750%, Series P due 2037 [Member]
Debt Instrument [Line Items]
Par value		$ 252
Other long-term debt		$ 256	$ 256
Debt Instrument, Interest Rate, Stated Percentage		6.75%	6.75%
Sierra Pacific Power Company [Member] | NV Energy [Member] | Subsidiary Debt [Member] | Gas and water facilities refunding revenue bonds, 3.000% series 2016B, due 2036 [Member]
Debt Instrument [Line Items]
Par value		$ 60
Other long-term debt		$ 61	$ 62
Debt Instrument, Interest Rate, Stated Percentage		3.00%	3.00%
Sierra Pacific Power Company [Member] | NV Energy [Member] | Subsidiary Debt [Member] | Water facilities refunding revenue bonds, series 2016C, due 2036 [Member]
Debt Instrument [Line Items]
Par value		$ 30
Other long-term debt		$ 30	$ 0
Debt Instrument, Interest Rate, Stated Percentage		0.625%
Sierra Pacific Power Company [Member] | NV Energy [Member] | Subsidiary Debt [Member] | Water facilities refunding revenue bonds, series 2016D, due 2036 [Member]
Debt Instrument [Line Items]
Par value		$ 25
Other long-term debt		$ 25	$ 25
Debt Instrument, Interest Rate, Stated Percentage		2.05%	2.05%
Sierra Pacific Power Company [Member] | NV Energy [Member] | Subsidiary Debt [Member] | Water facilities refunding revenue bonds, series 2016E, due 2036 [Member]
Debt Instrument [Line Items]
Par value		$ 25
Other long-term debt		$ 25	$ 25
Debt Instrument, Interest Rate, Stated Percentage		2.05%	2.05%
Northern Natural Gas [Member] | BHE Pipeline Group [Member] | Subsidiary Debt [Member] | Senior Bonds, 4.1%, due 2042 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		4.10%
Northern Natural Gas [Member] | BHE Pipeline Group [Member] | Subsidiary Debt [Member] | Senior Bonds, 4.30%, due 2049 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		4.30%
[1]	The par values for these debt instruments are denominated in sterling.
[2]	Subject to mandatory purchase by Sierra Pacific in June 2022 at which date the interest rate may be adjusted.
[3]	Bond was purchased by Sierra Pacific during 2019 and re-offered at a fixed rate in September 2020 for a two-year term subject to mandatory purchase by Sierra Pacific in April 2022.
[4]	Bonds were purchased by Sierra Pacific during 2019 and re-offered at a fixed interest rate.
[5]	Subject to mandatory purchase by Sierra Pacific in April 2022 at which date the interest rate may be adjusted.

Subsidiary Debt - NPC - Long-Te

Subsidiary Debt - NPC - Long-Term Debt (Details) - USD ($) $ in Millions		Dec. 31, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Par value		$ 49,759
Long-term Debt		49,866	$ 39,353
Current portion of long-term debt		1,839	2,539
Subsidiary Debt [Member]
Debt Instrument [Line Items]
Par value		36,108
Nevada Power Company [Member]
Debt Instrument [Line Items]
Par value		2,534
Long-term Debt		2,496	2,351
Current portion of long-term debt		0	575
Long-term Debt, Excluding Current Maturities		2,496	$ 1,776
Nevada Power Company [Member] | Subsidiary Debt [Member]
Debt Instrument [Line Items]
Long-term Debt		2,496
NV Energy [Member]
Debt Instrument [Line Items]
Par value		3,701
NV Energy [Member] | Subsidiary Debt [Member]
Debt Instrument [Line Items]
Par value		3,701
NV Energy [Member] | Nevada Power Company [Member]
Debt Instrument [Line Items]
Par value		2,534
NV Energy [Member] | Nevada Power Company [Member] | Mortgage Securities, 2.750%, Series BB due 2020 [Member]
Debt Instrument [Line Items]
Par value		0
NV Energy [Member] | Nevada Power Company [Member] | Mortgage Securities, 3.700%, Series CC due 2029 [Member]
Debt Instrument [Line Items]
Par value		500
NV Energy [Member] | Nevada Power Company [Member] | Mortgage Securities, 2.400%, Series DD due 2030 [Member]
Debt Instrument [Line Items]
Par value		425
NV Energy [Member] | Nevada Power Company [Member] | Mortgage Securities, 6.650%, Series N due 2036 [Member]
Debt Instrument [Line Items]
Par value		367
NV Energy [Member] | Nevada Power Company [Member] | Mortgage Securities, 6.750%, Series R due 2037 [Member]
Debt Instrument [Line Items]
Par value		349
NV Energy [Member] | Nevada Power Company [Member] | Mortgage Securities, 5.375%, Series X due 2040 [Member]
Debt Instrument [Line Items]
Par value		250
NV Energy [Member] | Nevada Power Company [Member] | Mortgage Securities, 5.450%, Series Y due 2041 [Member]
Debt Instrument [Line Items]
Par value		250
NV Energy [Member] | Nevada Power Company [Member] | Mortgage Securities, 3.125%, Series EE due 2050 [Member]
Debt Instrument [Line Items]
Par value		300
NV Energy [Member] | Nevada Power Company [Member] | NPC Pollution Control Refunding Revenue Bonds, 1.875%, Series 2017A, due 2032
Debt Instrument [Line Items]
Par value	[1]	40
NV Energy [Member] | Nevada Power Company [Member] | NPC Pollution Control Refunding Revenue Bonds, 1.65%, Series 2017, Due 2036
Debt Instrument [Line Items]
Par value	[1]	40
NV Energy [Member] | Nevada Power Company [Member] | NPC Pollution Control Refunding Revenue Bonds, 1.65%, Series 2017B, due 2039
Debt Instrument [Line Items]
Par value	[1]	$ 13
NV Energy [Member] | Nevada Power Company [Member] | Subsidiary Debt [Member] | Mortgage Securities, 2.750%, Series BB due 2020 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		2.75%	2.75%
Par value		$ 0
Long-term Debt		$ 0	$ 575
NV Energy [Member] | Nevada Power Company [Member] | Subsidiary Debt [Member] | Mortgage Securities, 3.700%, Series CC due 2029 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		3.70%	3.70%
Par value		$ 500
Long-term Debt		$ 496	$ 496
NV Energy [Member] | Nevada Power Company [Member] | Subsidiary Debt [Member] | Mortgage Securities, 2.400%, Series DD due 2030 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		2.40%	2.40%
Par value		$ 425
Long-term Debt		$ 422	$ 0
NV Energy [Member] | Nevada Power Company [Member] | Subsidiary Debt [Member] | Mortgage Securities, 6.650%, Series N due 2036 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		6.65%	6.65%
Par value		$ 367
Long-term Debt		$ 359	$ 358
NV Energy [Member] | Nevada Power Company [Member] | Subsidiary Debt [Member] | Mortgage Securities, 6.750%, Series R due 2037 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		6.75%	6.75%
Par value		$ 349
Long-term Debt		$ 346	$ 346
NV Energy [Member] | Nevada Power Company [Member] | Subsidiary Debt [Member] | Mortgage Securities, 5.375%, Series X due 2040 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		5.375%	5.375%
Par value		$ 250
Long-term Debt		$ 248	$ 248
NV Energy [Member] | Nevada Power Company [Member] | Subsidiary Debt [Member] | Mortgage Securities, 5.450%, Series Y due 2041 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		5.45%	5.45%
Par value		$ 250
Long-term Debt		$ 237	$ 237
NV Energy [Member] | Nevada Power Company [Member] | Subsidiary Debt [Member] | Mortgage Securities, 3.125%, Series EE due 2050 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		3.125%	3.125%
Par value		$ 300
Long-term Debt		$ 297	$ 0
NV Energy [Member] | Nevada Power Company [Member] | Subsidiary Debt [Member] | NPC Pollution Control Refunding Revenue Bonds, 1.875%, Series 2017A, due 2032
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		1.875%	1.875%
Par value		$ 40
Long-term Debt	[1]	$ 39	$ 39
NV Energy [Member] | Nevada Power Company [Member] | Subsidiary Debt [Member] | NPC Pollution Control Refunding Revenue Bonds, 1.65%, Series 2017, Due 2036
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		1.65%	1.65%
Long-term Debt	[1]	$ 39	$ 39
NV Energy [Member] | Nevada Power Company [Member] | Subsidiary Debt [Member] | NPC Pollution Control Refunding Revenue Bonds, 1.65%, Series 2017B, due 2039
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		1.65%	1.65%
Long-term Debt	[1]	$ 13	$ 13
[1]	Bonds were purchased by Nevada Power in May 2020 and re-offered at a fixed interest rate. Subject to mandatory purchase by Nevada Power in March 2023 at which date the interest rate may be adjusted.

Subsidiary Debt - NPC - Annual

Subsidiary Debt - NPC - Annual Payment on Long-Term Debt (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Long-term Debt, Maturities, Repayments of Principal after Year Five	$ 37,637
Long-term Debt	49,866	$ 39,353
Nevada Power Company [Member]
Debt Instrument [Line Items]
Long-term Debt	2,496	$ 2,351
Nevada Power Company [Member] | Subsidiary Debt [Member]
Debt Instrument [Line Items]
Long-term Debt, Maturities, Repayments of Principal after Year Five	2,534
Debt Instrument, Unamortized Premium, Discount and Debt Issuance Cost	38
Long-term Debt	2,496
NV Energy [Member] | Subsidiary Debt [Member]
Debt Instrument [Line Items]
Long-term Debt, Maturities, Repayments of Principal after Year Five	$ 3,451

Subsidiary Debt - NPC (Details)

Subsidiary Debt - NPC (Details) $ in Billions	Dec. 31, 2020USD ($)
Nevada Power Company [Member]
Debt Instrument [Line Items]
Eligible Property Subject To Lien Of Mortgages	$ 9.1

Subsidiary Debt - SPPC - Long-T

Subsidiary Debt - SPPC - Long-Term Debt (Details) - USD ($) $ in Millions		Dec. 31, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Par value		$ 49,759
Long-term Debt		49,866	$ 39,353
Subsidiary Debt [Member]
Debt Instrument [Line Items]
Par value		36,108
Sierra Pacific Power Company [Member]
Debt Instrument [Line Items]
Par value		1,167
Long-term Debt		1,164	1,135
Long-term Debt, Excluding Current Maturities		1,164	$ 1,135
NV Energy [Member]
Debt Instrument [Line Items]
Par value		3,701
NV Energy [Member] | Subsidiary Debt [Member]
Debt Instrument [Line Items]
Par value		3,701
NV Energy [Member] | Sierra Pacific Power Company [Member]
Debt Instrument [Line Items]
Par value		1,167
NV Energy [Member] | Sierra Pacific Power Company [Member] | Mortgage securities, 3.375%, Series T due 2023 [Member]
Debt Instrument [Line Items]
Par value		250
NV Energy [Member] | Sierra Pacific Power Company [Member] | Mortgage securities, 2.600%, Series U due 2026 [Member]
Debt Instrument [Line Items]
Par value		400
NV Energy [Member] | Sierra Pacific Power Company [Member] | Mortgage securities, 6.750%, Series P due 2037 [Member]
Debt Instrument [Line Items]
Par value		252
NV Energy [Member] | Sierra Pacific Power Company [Member] | Pollution Control Refunding Revenue Bonds, 1.850%, Series 2016B, due 2029 [Member]
Debt Instrument [Line Items]
Par value	[1]	30
NV Energy [Member] | Sierra Pacific Power Company [Member] | Gas and water facilities refunding revenue bonds, 3.000% series 2016B, due 2036 [Member]
Debt Instrument [Line Items]
Par value	[2]	60
NV Energy [Member] | Sierra Pacific Power Company [Member] | Water facilities refunding revenue bonds, series 2016C, due 2036 [Member]
Debt Instrument [Line Items]
Par value	[3]	30
NV Energy [Member] | Sierra Pacific Power Company [Member] | Water facilities refunding revenue bonds, series 2016D, due 2036 [Member]
Debt Instrument [Line Items]
Par value	[1],[4]	25
NV Energy [Member] | Sierra Pacific Power Company [Member] | Water facilities refunding revenue bonds, series 2016E, due 2036 [Member]
Debt Instrument [Line Items]
Par value	[1],[4]	25
NV Energy [Member] | Sierra Pacific Power Company [Member] | Water facilities refunding revenue bonds, series 2016F, due 2036 [Member]
Debt Instrument [Line Items]
Par value	[1]	75
NV Energy [Member] | Sierra Pacific Power Company [Member] | Water facilities refunding revenue bonds, series 2016G, due 2036 [Member]
Debt Instrument [Line Items]
Par value	[1]	$ 20
NV Energy [Member] | Sierra Pacific Power Company [Member] | Subsidiary Debt [Member] | Mortgage securities, 3.375%, Series T due 2023 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		3.375%	3.375%
Par value		$ 250
Long-term Debt		$ 249	$ 249
NV Energy [Member] | Sierra Pacific Power Company [Member] | Subsidiary Debt [Member] | Mortgage securities, 2.600%, Series U due 2026 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		2.60%	2.60%
Par value		$ 400
Long-term Debt		$ 396	$ 396
NV Energy [Member] | Sierra Pacific Power Company [Member] | Subsidiary Debt [Member] | Mortgage securities, 6.750%, Series P due 2037 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		6.75%	6.75%
Par value		$ 252
Long-term Debt		$ 255	$ 255
NV Energy [Member] | Sierra Pacific Power Company [Member] | Subsidiary Debt [Member] | Pollution Control Refunding Revenue Bonds, 1.850%, Series 2016B, due 2029 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		1.85%	1.85%
Par value		$ 30
Long-term Debt	[1]	$ 29	$ 29
NV Energy [Member] | Sierra Pacific Power Company [Member] | Subsidiary Debt [Member] | Gas and water facilities refunding revenue bonds, 3.000% series 2016B, due 2036 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		3.00%	3.00%
Par value		$ 60
Long-term Debt	[2]	$ 61	$ 62
NV Energy [Member] | Sierra Pacific Power Company [Member] | Subsidiary Debt [Member] | Water facilities refunding revenue bonds, series 2016C, due 2036 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		0.625%
Par value		$ 30
Long-term Debt	[3]	$ 30	$ 0
NV Energy [Member] | Sierra Pacific Power Company [Member] | Subsidiary Debt [Member] | Water facilities refunding revenue bonds, series 2016D, due 2036 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		2.05%	2.05%
Par value		$ 25
Long-term Debt	[1],[4]	$ 25	$ 25
NV Energy [Member] | Sierra Pacific Power Company [Member] | Subsidiary Debt [Member] | Water facilities refunding revenue bonds, series 2016E, due 2036 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		2.05%	2.05%
Par value		$ 25
Long-term Debt	[1],[4]	$ 25	$ 25
NV Energy [Member] | Sierra Pacific Power Company [Member] | Subsidiary Debt [Member] | Water facilities refunding revenue bonds, series 2016F, due 2036 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		2.05%	2.05%
Par value		$ 75
Long-term Debt	[1]	$ 74	$ 74
NV Energy [Member] | Sierra Pacific Power Company [Member] | Subsidiary Debt [Member] | Water facilities refunding revenue bonds, series 2016G, due 2036 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		1.85%	1.85%
Par value		$ 20
Long-term Debt	[1]	$ 20	$ 20
[1]	Subject to mandatory purchase by Sierra Pacific in April 2022 at which date the interest rate may be adjusted.
[2]	Subject to mandatory purchase by Sierra Pacific in June 2022 at which date the interest rate may be adjusted.
[3]	Bond was purchased by Sierra Pacific during 2019 and re-offered at a fixed rate in September 2020 for a two-year term subject to mandatory purchase by Sierra Pacific in April 2022.
[4]	Bonds were purchased by Sierra Pacific during 2019 and re-offered at a fixed interest rate.

Subsidiary Debt - SPPC - Annual

Subsidiary Debt - SPPC - Annual Payment on Long-Term Debt (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Long-term Debt, Maturities, Repayments of Principal in Year Three	$ 3,200
Long-term Debt, Maturities, Repayments of Principal after Year Five	37,637
Par value	49,759
Long-term Debt	49,866	$ 39,353
Sierra Pacific Power Company [Member]
Debt Instrument [Line Items]
Par value	1,167
Long-term Debt	1,164	$ 1,135
Sierra Pacific Power Company [Member] | Long-term Debt [Member]
Debt Instrument [Line Items]
Long-term Debt, Maturities, Repayments of Principal in Year Three	250
Long-term Debt, Maturities, Repayments of Principal after Year Five	917
Debt Instrument, Unamortized Premium, Discount and Debt Issuance Cost	(3)
Long-term Debt	1,164
NV Energy [Member]
Debt Instrument [Line Items]
Par value	3,701
NV Energy [Member] | Sierra Pacific Power Company [Member]
Debt Instrument [Line Items]
Par value	1,167
NV Energy [Member] | Sierra Pacific Power Company [Member] | Long-term Debt [Member]
Debt Instrument [Line Items]
Par value	$ 1,167

Subsidiary Debt - SPPC (Details

Subsidiary Debt - SPPC (Details) $ in Billions	Dec. 31, 2020USD ($)
Sierra Pacific Power Company [Member]
Debt Instrument [Line Items]
Eligible Property Subject To Lien Of Mortgages	$ 4.3

Subsidiary Debt - Northern Powe

Subsidiary Debt - Northern Powergrid (Details) - USD ($) $ in Millions		Dec. 31, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Par value		$ 49,759
Subsidiary Debt [Member]
Debt Instrument [Line Items]
Par value		36,108
Other long-term debt		36,319	$ 30,672
PacifiCorp [Member] | Subsidiary Debt [Member]
Debt Instrument [Line Items]
Par value		8,667
Other long-term debt		$ 8,612	$ 7,658
PacifiCorp [Member] | Subsidiary Debt [Member] | Minimum [Member]
Debt Instrument [Line Items]
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate		0.14%	1.60%
PacifiCorp [Member] | Subsidiary Debt [Member] | Maximum [Member]
Debt Instrument [Line Items]
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate		0.16%	1.80%
Northern Powergrid Holdings [Member] | Subsidiary Debt [Member]
Debt Instrument [Line Items]
Par value	[1]	$ 3,285
Other long-term debt		3,259	$ 3,221
Northern Powergrid Holdings [Member] | Subsidiary Debt [Member] | Bonds, 8.875%, due 2020 [Member]
Debt Instrument [Line Items]
Par value		0
Other long-term debt		$ 0	135
Debt Instrument, Interest Rate, Stated Percentage		8.875%
Northern Powergrid Holdings [Member] | Subsidiary Debt [Member] | Bonds, 9.25%, due 2020 [Member]
Debt Instrument [Line Items]
Par value		$ 0
Other long-term debt		$ 0	265
Debt Instrument, Interest Rate, Stated Percentage		9.25%
Northern Powergrid Holdings [Member] | Subsidiary Debt [Member] | European Investment Bank loans, 4.133% to 4.586%, due 2019 to 2022 [Member]
Debt Instrument [Line Items]
Par value	[1]	$ 206
Other long-term debt		$ 206	252
Northern Powergrid Holdings [Member] | Subsidiary Debt [Member] | European Investment Bank loans, 4.133% to 4.586%, due 2019 to 2022 [Member] | Minimum [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		4.133%
Northern Powergrid Holdings [Member] | Subsidiary Debt [Member] | Bonds, 7.25%, due 2022 [Member]
Debt Instrument [Line Items]
Par value	[1]	$ 274
Other long-term debt		$ 277	270
Debt Instrument, Interest Rate, Stated Percentage		7.25%
Northern Powergrid Holdings [Member] | Subsidiary Debt [Member] | Bonds, 2.50%, due 2025 [Member]
Debt Instrument [Line Items]
Par value	[1]	$ 205
Other long-term debt		$ 203	197
Debt Instrument, Interest Rate, Stated Percentage		2.50%
Northern Powergrid Holdings [Member] | Subsidiary Debt [Member] | European Investment Bank loan, 2.073%, due 2025 [Member]
Debt Instrument [Line Items]
Par value	[1]	$ 68
Other long-term debt		$ 70	68
Debt Instrument, Interest Rate, Stated Percentage		2.073%
Northern Powergrid Holdings [Member] | Subsidiary Debt [Member] | European Investment Bank loans, 2.564%, due 2017 [Member]
Debt Instrument [Line Items]
Par value	[1]	$ 342
Other long-term debt		$ 340	330
Debt Instrument, Interest Rate, Stated Percentage		2.564%
Northern Powergrid Holdings [Member] | Subsidiary Debt [Member] | Bonds, 7.25%, due 2028 [Member]
Debt Instrument [Line Items]
Par value	[1]	$ 254
Other long-term debt		$ 257	250
Debt Instrument, Interest Rate, Stated Percentage		7.25%
Northern Powergrid Holdings [Member] | Subsidiary Debt [Member] | Bonds, 5.125%, due 2035 [Member]
Debt Instrument [Line Items]
Par value	[1]	$ 274
Other long-term debt		$ 270	262
Debt Instrument, Interest Rate, Stated Percentage		5.125%
Northern Powergrid Holdings [Member] | Subsidiary Debt [Member] | Bonds, 5.125%, due 2035 [Member]
Debt Instrument [Line Items]
Par value	[1]	$ 205
Other long-term debt		$ 203	197
Debt Instrument, Interest Rate, Stated Percentage		5.125%
Northern Powergrid Holdings [Member] | Subsidiary Debt [Member] | Bonds, 4.375%, due 2032 [Member]
Debt Instrument [Line Items]
Par value	[1]	$ 205
Other long-term debt		$ 202	196
Debt Instrument, Interest Rate, Stated Percentage		4.375%
Northern Powergrid Holdings [Member] | Subsidiary Debt [Member] | Variable-rate bond, due 2026 [Member]
Debt Instrument [Line Items]
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate		2.03%
Par value	[1],[2]	$ 186
Other long-term debt	[2]	$ 183	214
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate		3.07%
Northern Powergrid Holdings [Member] | Subsidiary Debt [Member] | Variable-rate bond, due 2026, 100% variable
Debt Instrument [Line Items]
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate		2.02%
Par value		$ 41
Other long-term debt		41	0
Northern Powergrid Holdings [Member] | Subsidiary Debt [Member] | Guaranteed Bonds, 2.75%, due May 2049 [Member]
Debt Instrument [Line Items]
Par value	[1]	205
Other long-term debt		$ 202	196
Debt Instrument, Interest Rate, Stated Percentage		2.75%
Northern Powergrid Holdings [Member] | Subsidiary Debt [Member] | Bonds, 2.25%, due 2059 [Member]
Debt Instrument [Line Items]
Par value	[1]	$ 410
Other long-term debt		$ 402	389
Debt Instrument, Interest Rate, Stated Percentage		2.25%
Northern Powergrid Holdings [Member] | Subsidiary Debt [Member] | Bonds, 1.875%, due 2062
Debt Instrument [Line Items]
Par value		$ 410
Other long-term debt		$ 403	$ 0
Debt Instrument, Interest Rate, Stated Percentage		1.875%
[1]	The par values for these debt instruments are denominated in sterling.
[2]	Amortizes semiannually and the Company has entered into an interest rate swap that fixes the interest rate on 89% of the outstanding debt. The variable interest rate as of December 31, 2020 was 2.03% (including 2.0% margin) and the fixed interest rate was 3.07% (including 2.0% margin), resulting in a blended rate of 2.96%. (3) Amortizes semiannually and is 100% variable based on LIBOR. The variable interest rate as of December 31, 2020 was 2.02% (including 2.0% margin).

Subsidiary Debt - BHE Pipeline

Subsidiary Debt - BHE Pipeline Group (Details) € in Millions, $ in Millions	Dec. 31, 2020USD ($)	Dec. 31, 2020EUR (€)	Dec. 31, 2019USD ($)
Debt Instrument [Line Items]
Par value	$ 49,759
Subsidiary Debt [Member]
Debt Instrument [Line Items]
Par value	36,108
Other long-term debt	36,319		$ 30,672
BHE Pipeline Group [Member]
Debt Instrument [Line Items]
Par value	5,705
Other long-term debt	6,165		1,247
BHE Pipeline Group [Member] | Subsidiary Debt [Member]
Debt Instrument [Line Items]
Par value	5,705
Northern Natural Gas [Member] | BHE Pipeline Group [Member]
Debt Instrument [Line Items]
Par value	1,250
Other long-term debt	1,247		1,247
Northern Natural Gas [Member] | BHE Pipeline Group [Member] | Senior Notes, 4.25%, due 2021 [Member]
Debt Instrument [Line Items]
Par value	200
Other long-term debt	200		200
Northern Natural Gas [Member] | BHE Pipeline Group [Member] | Senior Bonds, 5.8%, due 2037 [Member]
Debt Instrument [Line Items]
Par value	150
Other long-term debt	149		149
Northern Natural Gas [Member] | BHE Pipeline Group [Member] | Senior Bonds, 4.1%, due 2042 [Member]
Debt Instrument [Line Items]
Par value	250
Other long-term debt	248		248
Northern Natural Gas [Member] | BHE Pipeline Group [Member] | Senior Bonds, 4.30%, due 2049 [Member]
Debt Instrument [Line Items]
Par value	650
Other long-term debt	650		650
Eastern Energy Gas Holdings, LLC [Member]
Debt Instrument [Line Items]
Par value	4,455
Eastern Energy Gas Holdings, LLC [Member] | EEGH Variable Rate Senior Notes, due 2021 [Member]
Debt Instrument [Line Items]
Par value	500
Eastern Energy Gas Holdings, LLC [Member] | EEGH 2.875% Senior Notes, due 2023 [Member]
Debt Instrument [Line Items]
Par value	$ 250
Debt Instrument, Interest Rate, Stated Percentage	2.875%	2.875%
Eastern Energy Gas Holdings, LLC [Member] | EEGH 3.55% Senior Notes, due 2023 [Member]
Debt Instrument [Line Items]
Par value	$ 400
Debt Instrument, Interest Rate, Stated Percentage	3.55%	3.55%
Eastern Energy Gas Holdings, LLC [Member] | EEGH 2.5% Senior Notes, due 2024 [Member]
Debt Instrument [Line Items]
Par value	$ 600
Debt Instrument, Interest Rate, Stated Percentage	2.50%	2.50%
Eastern Energy Gas Holdings, LLC [Member] | EEGH 3.6% Senior Notes, due 2024 [Member]
Debt Instrument [Line Items]
Par value	$ 450
Debt Instrument, Interest Rate, Stated Percentage	3.60%	3.60%
Eastern Energy Gas Holdings, LLC [Member] | EEGH 3% Senior Notes, due 2029 [Member]
Debt Instrument [Line Items]
Par value	$ 600
Debt Instrument, Interest Rate, Stated Percentage	3.00%	3.00%
Eastern Energy Gas Holdings, LLC [Member] | EEGH 3.8% Senior Notes, due 2031 [Member]
Debt Instrument [Line Items]
Par value	$ 150
Debt Instrument, Interest Rate, Stated Percentage	3.80%	3.80%
Eastern Energy Gas Holdings, LLC [Member] | EEGH 4.8% Senior Notes, due 2043 [Member]
Debt Instrument [Line Items]
Par value	$ 400
Debt Instrument, Interest Rate, Stated Percentage	4.80%	4.80%
Eastern Energy Gas Holdings, LLC [Member] | EEGH 4.6% Senior Notes, due 2044 [Member]
Debt Instrument [Line Items]
Par value	$ 500
Debt Instrument, Interest Rate, Stated Percentage	4.60%	4.60%
Eastern Energy Gas Holdings, LLC [Member] | EEGH 3.9% Senior Notes, due 2049 [Member]
Debt Instrument [Line Items]
Par value	$ 300
Debt Instrument, Interest Rate, Stated Percentage	3.90%	3.90%
Eastern Energy Gas Holdings, LLC [Member] | EEGH 3.32% Senior Notes, due 2026 [Member]
Debt Instrument [Line Items]
Par value	$ 305	€ 250
Debt Instrument, Interest Rate, Stated Percentage	3.32%	3.32%
Eastern Energy Gas Holdings, LLC [Member] | BHE Pipeline Group [Member]
Debt Instrument [Line Items]
Par value	$ 4,455
Other long-term debt	4,425		0
Other Long-term Debt, Purchase Accounting Adjustment	493		0
Debt Instrument, Face Amount, Purchase Accounting Adjustment	0
Other Long-term Debt, Net of Purchase Accounting Adjustment	4,918		0
Debt Instrument, Face Amount, Net of Purchase Accounting Adjustment	4,455
Eastern Energy Gas Holdings, LLC [Member] | BHE Pipeline Group [Member] | Subsidiary Debt [Member] | EEGH Variable Rate Senior Notes, due 2021 [Member]
Debt Instrument [Line Items]
Par value	500
Other long-term debt	500		0
Eastern Energy Gas Holdings, LLC [Member] | BHE Pipeline Group [Member] | Subsidiary Debt [Member] | EEGH 2.875% Senior Notes, due 2023 [Member]
Debt Instrument [Line Items]
Par value	250
Other long-term debt	$ 249		0
Debt Instrument, Interest Rate, Stated Percentage	2.875%	2.875%
Eastern Energy Gas Holdings, LLC [Member] | BHE Pipeline Group [Member] | Subsidiary Debt [Member] | EEGH 3.55% Senior Notes, due 2023 [Member]
Debt Instrument [Line Items]
Par value	$ 400
Other long-term debt	$ 399		0
Debt Instrument, Interest Rate, Stated Percentage	3.55%	3.55%
Eastern Energy Gas Holdings, LLC [Member] | BHE Pipeline Group [Member] | Subsidiary Debt [Member] | EEGH 2.5% Senior Notes, due 2024 [Member]
Debt Instrument [Line Items]
Par value	$ 600
Other long-term debt	$ 596		0
Debt Instrument, Interest Rate, Stated Percentage	2.50%	2.50%
Eastern Energy Gas Holdings, LLC [Member] | BHE Pipeline Group [Member] | Subsidiary Debt [Member] | EEGH 3.6% Senior Notes, due 2024 [Member]
Debt Instrument [Line Items]
Par value	$ 450
Other long-term debt	$ 448		0
Debt Instrument, Interest Rate, Stated Percentage	3.60%	3.60%
Eastern Energy Gas Holdings, LLC [Member] | BHE Pipeline Group [Member] | Subsidiary Debt [Member] | EEGH 3% Senior Notes, due 2029 [Member]
Debt Instrument [Line Items]
Par value	$ 600
Other long-term debt	$ 594		0
Debt Instrument, Interest Rate, Stated Percentage	3.00%	3.00%
Eastern Energy Gas Holdings, LLC [Member] | BHE Pipeline Group [Member] | Subsidiary Debt [Member] | EEGH 3.8% Senior Notes, due 2031 [Member]
Debt Instrument [Line Items]
Par value	$ 150
Other long-term debt	$ 150		0
Debt Instrument, Interest Rate, Stated Percentage	3.80%	3.80%
Eastern Energy Gas Holdings, LLC [Member] | BHE Pipeline Group [Member] | Subsidiary Debt [Member] | EEGH 4.8% Senior Notes, due 2043 [Member]
Debt Instrument [Line Items]
Par value	$ 400
Other long-term debt	$ 395		0
Debt Instrument, Interest Rate, Stated Percentage	4.80%	4.80%
Eastern Energy Gas Holdings, LLC [Member] | BHE Pipeline Group [Member] | Subsidiary Debt [Member] | EEGH 4.6% Senior Notes, due 2044 [Member]
Debt Instrument [Line Items]
Par value	$ 500
Other long-term debt	$ 493		0
Debt Instrument, Interest Rate, Stated Percentage	4.60%	4.60%
Eastern Energy Gas Holdings, LLC [Member] | BHE Pipeline Group [Member] | Subsidiary Debt [Member] | EEGH 3.9% Senior Notes, due 2049 [Member]
Debt Instrument [Line Items]
Par value	$ 300
Other long-term debt	$ 297		0
Debt Instrument, Interest Rate, Stated Percentage	3.90%	3.90%
Eastern Energy Gas Holdings, LLC [Member] | BHE Pipeline Group [Member] | Subsidiary Debt [Member] | EEGH 3.32% Senior Notes, due 2026 [Member]
Debt Instrument [Line Items]
Par value	$ 305	€ 250
Other long-term debt	$ 304		$ 0
Debt Instrument, Interest Rate, Stated Percentage	3.32%	3.32%
Northern Natural Gas [Member] | BHE Pipeline Group [Member] | Subsidiary Debt [Member] | Senior Notes, 4.25%, due 2021 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	4.25%	4.25%
Northern Natural Gas [Member] | BHE Pipeline Group [Member] | Subsidiary Debt [Member] | Senior Bonds, 5.8%, due 2037 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	5.80%	5.80%
Northern Natural Gas [Member] | BHE Pipeline Group [Member] | Subsidiary Debt [Member] | Senior Bonds, 4.1%, due 2042 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	4.10%	4.10%
Northern Natural Gas [Member] | BHE Pipeline Group [Member] | Subsidiary Debt [Member] | Senior Bonds, 4.30%, due 2049 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	4.30%	4.30%

Subsidiary Debt - AltaLink (Det

Subsidiary Debt - AltaLink (Details) - USD ($) $ in Millions		Dec. 31, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Par value		$ 49,759
Subsidiary Debt [Member]
Debt Instrument [Line Items]
Par value		36,108
Other long-term debt		36,319	$ 30,672
ALP Investments [Member]
Debt Instrument [Line Items]
Par value	[1]	157
Other long-term debt		157	308
ALP Investments [Member] | Series 13-1 Senior Bonds, 3.265%, due 2020 [Member]
Debt Instrument [Line Items]
Par value		0
Other long-term debt		0	154
ALP Investments [Member] | Series 15-1 Senior Bonds, 2.244%, due 2022 [Member]
Debt Instrument [Line Items]
Par value	[1]	157
Other long-term debt		$ 157	154
ALP Investments [Member] | Subsidiary Debt [Member] | Series 13-1 Senior Bonds, 3.265%, due 2020 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		3.265%
ALP Investments [Member] | Subsidiary Debt [Member] | Series 15-1 Senior Bonds, 2.244%, due 2022 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		2.244%
AltaLink, L.P. [Member] | Subsidiary Debt [Member]
Debt Instrument [Line Items]
Par value	[1]	$ 3,733
Other long-term debt		$ 3,713	3,564
AltaLink, L.P. [Member] | Subsidiary Debt [Member] | Series 2013-2 Notes, 3.621%, due 2020 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		3.621%
Par value		$ 0
Other long-term debt		$ 0	96
AltaLink, L.P. [Member] | Subsidiary Debt [Member] | Series 2012-2 Notes, 2.978%, due 2022 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		2.978%
Par value	[1]	$ 216
Other long-term debt		$ 216	212
AltaLink, L.P. [Member] | Subsidiary Debt [Member] | Series 2013-4 Notes, 3.668%, due 2023 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		3.668%
Par value	[1]	$ 393
Other long-term debt		$ 392	384
AltaLink, L.P. [Member] | Subsidiary Debt [Member] | Series 2014-1 Notes, 3.399%, due 2024 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		3.399%
Par value	[1]	$ 275
Other long-term debt		$ 275	269
AltaLink, L.P. [Member] | Subsidiary Debt [Member] | Series 2016-1 Notes, 2.747%, due 2026 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		2.747%
Par value	[1]	$ 275
Other long-term debt		$ 274	269
AltaLink, L.P. [Member] | Subsidiary Debt [Member] | Series 2006-1 Notes, 5.249%, due 2036 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		5.249%
Par value	[1]	$ 118
Other long-term debt		$ 118	115
AltaLink, L.P. [Member] | Subsidiary Debt [Member] | Series 2010-1 Notes, 5.381%, due 2040 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		5.381%
Par value	[1]	$ 98
Other long-term debt		$ 98	96
AltaLink, L.P. [Member] | Subsidiary Debt [Member] | Series 2010-2 Notes, 4.872%, due 2040 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		4.872%
Par value	[1]	$ 118
Other long-term debt		$ 117	115
AltaLink, L.P. [Member] | Subsidiary Debt [Member] | Series 2011-1 Notes, 4.462%, due 2041 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		4.462%
Par value	[1]	$ 216
Other long-term debt		$ 215	211
AltaLink, L.P. [Member] | Subsidiary Debt [Member] | Series 2012-1 Notes, 3.99%, due 2042 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		3.99%
Par value	[1]	$ 413
Other long-term debt		$ 407	398
AltaLink, L.P. [Member] | Subsidiary Debt [Member] | Series 2013-3 Notes, 4.922%, due 2043 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		4.922%
Par value	[1]	$ 275
Other long-term debt		$ 274	268
AltaLink, L.P. [Member] | Subsidiary Debt [Member] | Series 2014-3 Notes, 4.054%, due 2044 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		4.054%
Par value	[1]	$ 232
Other long-term debt		$ 230	226
AltaLink, L.P. [Member] | Subsidiary Debt [Member] | Series 2015-1 Notes, 4.090%, due 2045 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		4.09%
Par value	[1]	$ 275
Other long-term debt		$ 273	268
AltaLink, L.P. [Member] | Subsidiary Debt [Member] | Series 2016-2 Notes, 3.717%, due 2046 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		3.717%
Par value	[1]	$ 354
Other long-term debt		$ 351	345
AltaLink, L.P. [Member] | Subsidiary Debt [Member] | Series 2013-1 Notes, 4.446%, due 2053 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		4.446%
Par value	[1]	$ 196
Other long-term debt		$ 196	192
AltaLink, L.P. [Member] | Subsidiary Debt [Member] | Series 2014-2 Notes, 4.274%, due 2064 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		4.274%
Par value	[1]	$ 102
Other long-term debt		$ 102	100
AltaLink, L.P. [Member] | Subsidiary Debt [Member] | Construction Loan, 5.620%, due 2020 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		5.62%
Par value	[1]	$ 7
Other long-term debt		$ 7	7
AltaLink, L.P. [Member] | Subsidiary Debt [Member] | Series 2020-1 Notes, 1.509%, due 2030
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		1.509%
Par value		$ 177
Other long-term debt		175	0
BHE Transmission [Member] | Subsidiary Debt [Member]
Debt Instrument [Line Items]
Par value	[1]	3,897
Other long-term debt		$ 3,877	$ 3,879
[1]	The par values for these debt instruments are denominated in Canadian dollars.

Subsidiary Debt - BHE Renewable

Subsidiary Debt - BHE Renewables (Details) - USD ($) $ in Millions		Dec. 31, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Par value		$ 49,759
Subsidiary Debt [Member]
Debt Instrument [Line Items]
Par value		36,108
Other long-term debt		36,319	$ 30,672
Berkshire Hathaway Energy Renewables [Member] | Subsidiary Debt [Member]
Debt Instrument [Line Items]
Par value		3,152
Other long-term debt		$ 3,116	3,206
Berkshire Hathaway Energy Renewables [Member] | Subsidiary Debt [Member] | Minimum [Member]
Debt Instrument [Line Items]
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate		3.21%
Berkshire Hathaway Energy Renewables [Member] | Subsidiary Debt [Member] | Maximum [Member]
Debt Instrument [Line Items]
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate		5.41%
Berkshire Hathaway Energy Renewables [Member] | Subsidiary Debt [Member] | Bishop Hill Holdings Senior Notes, 5.125%, due 2032 [Member]
Debt Instrument [Line Items]
Par value	[1]	$ 70
Other long-term debt	[1]	$ 69	77
Debt Instrument, Interest Rate, Stated Percentage		5.125%
Berkshire Hathaway Energy Renewables [Member] | Subsidiary Debt [Member] | Solar Star Funding, LLC Series A Senior Secured Notes, 3.950%, due June 2035 [Member]
Debt Instrument [Line Items]
Par value	[1]	$ 271
Other long-term debt	[1]	$ 269	280
Debt Instrument, Interest Rate, Stated Percentage		3.95%
Berkshire Hathaway Energy Renewables [Member] | Subsidiary Debt [Member] | Solar Star Funding, LLC Series A Senior Secured Notes, 5.375%, due June 2035 [Member]
Debt Instrument [Line Items]
Par value	[1]	$ 861
Other long-term debt	[1]	$ 853	886
Debt Instrument, Interest Rate, Stated Percentage		5.375%
Berkshire Hathaway Energy Renewables [Member] | Subsidiary Debt [Member] | Grande Prairie Wind, Senior Notes, 3.860%, due 2037 [Member]
Debt Instrument [Line Items]
Par value	[1]	$ 330
Other long-term debt		$ 327	355
Debt Instrument, Interest Rate, Stated Percentage		3.86%
Berkshire Hathaway Energy Renewables [Member] | Subsidiary Debt [Member] | Topaz Solar Farms Senior Notes, 5.75%, due 2039 [Member]
Debt Instrument [Line Items]
Par value	[1]	$ 638
Other long-term debt	[1]	$ 631	672
Debt Instrument, Interest Rate, Stated Percentage		5.75%
Berkshire Hathaway Energy Renewables [Member] | Subsidiary Debt [Member] | Topaz Solar Farms Senior Notes, 4.875%, due 2039
Debt Instrument [Line Items]
Par value	[1]	$ 182
Other long-term debt	[1]	$ 180	193
Debt Instrument, Interest Rate, Stated Percentage		4.875%
Berkshire Hathaway Energy Renewables [Member] | Subsidiary Debt [Member] | Alamo 6 Senior Notes, 4.170%, due 2042 [Member]
Debt Instrument [Line Items]
Par value	[1]	$ 208
Other long-term debt	[1]	$ 205	213
Debt Instrument, Interest Rate, Stated Percentage		4.17%
Berkshire Hathaway Energy Renewables [Member] | Subsidiary Debt [Member] | Other debt obligations [Member]
Debt Instrument [Line Items]
Par value	[1]	$ 9
Other long-term debt	[1]	8	13
Berkshire Hathaway Energy Renewables [Member] | Subsidiary Debt [Member] | TX Jumbo Road Term Loan, 3.626% due 2025 [Member]
Debt Instrument [Line Items]
Par value	[1],[2]	140
Other long-term debt	[1],[2]	138	158
Berkshire Hathaway Energy Renewables [Member] | Subsidiary Debt [Member] | Marshall Wind term loan, variable interest rate, due 2026 [Member]
Debt Instrument [Line Items]
Par value	[1],[2]	70
Other long-term debt	[1],[2]	69	75
Berkshire Hathaway Energy Renewables [Member] | Subsidiary Debt [Member] | Pinyon Pines I and II Term Loan, due 2034 [Member]
Debt Instrument [Line Items]
Par value	[1],[2]	373
Other long-term debt	[1],[2]	$ 367	$ 284
Debt Instrument, Interest Rate, Stated Percentage			3.69%
[1]	Amortizes quarterly or semiannually.
[2]	The term loans have variable interest rates based on LIBOR plus a margin that varies during the terms of the agreements. The Company has entered into interest rate swaps that fix the interest rate on 100% of the Pinyon Pines, TX Jumbo Road and Marshall Wind outstanding debt. The fixed interest rates as of December 31, 2020 and 2019 ranged from 3.21% to 5.41%. As of December 31, 2019, Pinyon Pines I and II had entered into interest rate swaps that fixed the interest rate on 75% of the Pinyon Pines outstanding debt through December 31, 2019 and 50% of the Pinyon Pines outstanding debt thereafter. The variable interest rate as of December 31, 2019 was 3.69%.

Subsidiary Debt - HomeServices

Subsidiary Debt - HomeServices (Details) - USD ($) $ in Millions		Dec. 31, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Par value		$ 49,759
Long-term Debt		49,866	$ 39,353
Subsidiary Debt [Member]
Debt Instrument [Line Items]
Par value		36,108
HomeServices [Member] | Subsidiary Debt [Member]
Debt Instrument [Line Items]
Par value		$ 186
HomeServices [Member] | HomeServices [Member] | Subsidiary Debt [Member] | Variable-rate Term Loan - Due 2022 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		1.394%	3.299%
Par value	[1]	$ 186
Long-term Debt	[1]	$ 186	$ 213
[1]	Term loan amortizes quarterly and variable-rate resets monthly.

Subsidiary Debt - EEGH (Details

Subsidiary Debt - EEGH (Details) € in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2020USD ($)	Dec. 31, 2020EUR (€)	Dec. 31, 2019USD ($)
Debt Instrument [Line Items]
Par value	$ 49,759
Long-term Debt	49,866		$ 39,353
Current portion of long-term debt	1,839		2,539
BHE Pipeline Group [Member]
Debt Instrument [Line Items]
Par value	5,705
Subsidiary Debt [Member]
Debt Instrument [Line Items]
Par value	36,108
Subsidiary Debt [Member] | Berkshire Hathaway Energy Renewables [Member]
Debt Instrument [Line Items]
Par value	3,152
Subsidiary Debt [Member] | BHE Pipeline Group [Member]
Debt Instrument [Line Items]
Par value	$ 5,705
Maximum [Member] | Subsidiary Debt [Member] | Berkshire Hathaway Energy Renewables [Member]
Debt Instrument [Line Items]
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate	5.41%	5.41%
Eastern Energy Gas Holdings, LLC [Member]
Debt Instrument [Line Items]
Par value	$ 4,455
Long-term Debt	4,425		5,520
Current portion of long-term debt	500		699
Long-term Debt, Excluding Current Maturities	3,925		4,821
Eastern Energy Gas Holdings, LLC [Member] | BHE Pipeline Group [Member]
Debt Instrument [Line Items]
Par value	4,455
Eastern Energy Gas Holdings, LLC [Member] | EEGH Variable Rate Senior Notes, due 2021 [Member]
Debt Instrument [Line Items]
Par value	500
Long-term Debt	500		499
Eastern Energy Gas Holdings, LLC [Member] | EEGH Variable Rate Senior Notes, due 2021 [Member] | Subsidiary Debt [Member] | BHE Pipeline Group [Member]
Debt Instrument [Line Items]
Par value	$ 500
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate	3.46%	3.46%
Debt Instrument, Basis Spread on Variable Rate	0.60%
Eastern Energy Gas Holdings, LLC [Member] | EEGH 2.8% Senior Notes, due 2020 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	2.80%	2.80%
Par value	$ 0
Long-term Debt	$ 0		699
Eastern Energy Gas Holdings, LLC [Member] | EEGH 3.91% Senior Notes, due 2038 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	3.91%	3.91%
Par value	$ 0
Long-term Debt	$ 0		149
Eastern Energy Gas Holdings, LLC [Member] | EEGH 4.875% Senior Notes, due 2041 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	4.875%	4.875%
Par value	$ 0
Long-term Debt	$ 0		177
Eastern Energy Gas Holdings, LLC [Member] | EEGH 4.8% Senior Notes, due 2043 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	4.80%	4.80%
Par value	$ 400
Long-term Debt	$ 395		395
Eastern Energy Gas Holdings, LLC [Member] | EEGH 4.8% Senior Notes, due 2043 [Member] | Subsidiary Debt [Member] | BHE Pipeline Group [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	4.80%	4.80%
Par value	$ 400
Eastern Energy Gas Holdings, LLC [Member] | EEGH 2.875% Senior Notes, due 2023 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	2.875%	2.875%
Par value	$ 250
Long-term Debt	$ 249		249
Eastern Energy Gas Holdings, LLC [Member] | EEGH 2.875% Senior Notes, due 2023 [Member] | Subsidiary Debt [Member] | BHE Pipeline Group [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	2.875%	2.875%
Par value	$ 250
Eastern Energy Gas Holdings, LLC [Member] | EEGH 3.55% Senior Notes, due 2023 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	3.55%	3.55%
Par value	$ 400
Long-term Debt	$ 399		398
Eastern Energy Gas Holdings, LLC [Member] | EEGH 3.55% Senior Notes, due 2023 [Member] | Subsidiary Debt [Member] | BHE Pipeline Group [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	3.55%	3.55%
Par value	$ 400
Eastern Energy Gas Holdings, LLC [Member] | EEGH 2.5% Senior Notes, due 2024 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	2.50%	2.50%
Par value	$ 600
Long-term Debt	$ 596		596
Eastern Energy Gas Holdings, LLC [Member] | EEGH 2.5% Senior Notes, due 2024 [Member] | Subsidiary Debt [Member] | BHE Pipeline Group [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	2.50%	2.50%
Par value	$ 600
Eastern Energy Gas Holdings, LLC [Member] | EEGH 3.6% Senior Notes, due 2024 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	3.60%	3.60%
Par value	$ 450
Long-term Debt	$ 448		447
Eastern Energy Gas Holdings, LLC [Member] | EEGH 3.6% Senior Notes, due 2024 [Member] | Subsidiary Debt [Member] | BHE Pipeline Group [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	3.60%	3.60%
Par value	$ 450
Eastern Energy Gas Holdings, LLC [Member] | EEGH 3.32% Senior Notes, due 2026 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	3.32%	3.32%
Par value	$ 305	€ 250
Long-term Debt	$ 304		279
Eastern Energy Gas Holdings, LLC [Member] | EEGH 3.32% Senior Notes, due 2026 [Member] | Subsidiary Debt [Member] | BHE Pipeline Group [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	3.32%	3.32%
Par value	$ 305	€ 250
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate	3.32%	3.32%
Debt Instrument, Outstanding Principal Amount Including Swap Amount	$ 280
Eastern Energy Gas Holdings, LLC [Member] | EEGH 3.53% Senior Notes, due 2028 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	3.53%	3.53%
Par value	$ 0
Long-term Debt	$ 0		99
Eastern Energy Gas Holdings, LLC [Member] | EEGH 3% Senior Notes, due 2029 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	3.00%	3.00%
Par value	$ 600
Long-term Debt	$ 594		594
Eastern Energy Gas Holdings, LLC [Member] | EEGH 3% Senior Notes, due 2029 [Member] | Subsidiary Debt [Member] | BHE Pipeline Group [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	3.00%	3.00%
Par value	$ 600
Eastern Energy Gas Holdings, LLC [Member] | EEGH 3.8% Senior Notes, due 2031 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	3.80%	3.80%
Par value	$ 150
Long-term Debt	$ 150		149
Eastern Energy Gas Holdings, LLC [Member] | EEGH 3.8% Senior Notes, due 2031 [Member] | Subsidiary Debt [Member] | BHE Pipeline Group [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	3.80%	3.80%
Par value	$ 150
Eastern Energy Gas Holdings, LLC [Member] | EEGH 4.6% Senior Notes, due 2044 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	4.60%	4.60%
Par value	$ 500
Long-term Debt	$ 493		493
Eastern Energy Gas Holdings, LLC [Member] | EEGH 4.6% Senior Notes, due 2044 [Member] | Subsidiary Debt [Member] | BHE Pipeline Group [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	4.60%	4.60%
Par value	$ 500
Eastern Energy Gas Holdings, LLC [Member] | EEGH 3.9% Senior Notes, due 2049 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	3.90%	3.90%
Par value	$ 300
Long-term Debt	$ 297		$ 297
Eastern Energy Gas Holdings, LLC [Member] | EEGH 3.9% Senior Notes, due 2049 [Member] | Subsidiary Debt [Member] | BHE Pipeline Group [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	3.90%	3.90%
Par value	$ 300
Eastern Energy Gas Holdings, LLC [Member] | EEGH 3.32% Senior Notes, due 2026, Denominated in Euros [Member] | Subsidiary Debt [Member] | BHE Pipeline Group [Member]
Debt Instrument [Line Items]
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate	1.45%	1.45%

Subsidiary Debt - EEGH - Maturi

Subsidiary Debt - EEGH - Maturities of Long-term Debt (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months	$ 1,839
Long-term Debt, Maturities, Repayments of Principal in Year Two	1,848
Long-term Debt, Maturities, Repayments of Principal in Year Three	3,200
Long-term Debt, Maturities, Repayments of Principal in Year Four	2,710
Long-term Debt, Maturities, Repayments of Principal in Year Five	2,525
Long-term Debt, Maturities, Repayments of Principal after Year Five	37,637
Par value	49,759
Long-term Debt	49,866	$ 39,353
Eastern Energy Gas Holdings, LLC [Member]
Debt Instrument [Line Items]
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months	500
Long-term Debt, Maturities, Repayments of Principal in Year Two	0
Long-term Debt, Maturities, Repayments of Principal in Year Three	650
Long-term Debt, Maturities, Repayments of Principal in Year Four	1,050
Long-term Debt, Maturities, Repayments of Principal in Year Five	0
Long-term Debt, Maturities, Repayments of Principal after Year Five	2,255
Par value	4,455
Debt Instrument, Unamortized Premium, Discount and Debt Issuance Cost	(30)
Long-term Debt	$ 4,425	$ 5,520

Risk Management and Hedging A_3

Risk Management and Hedging Activities - PacifiCorp - Balance Sheet Location (Details) - PacifiCorp [Member] - Commodity Contract [Member] - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Derivatives, Fair Value [Line Items]
Derivative, fair value, net	$ (17)	$ (63)
Cash collateral receivable	24	47
Derivative Assets (Liabilities), at Fair Value, Net	7	(16)
Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative, fair value, net	27	12
Cash collateral receivable	0	0
Derivative Assets (Liabilities), at Fair Value, Net	27	12
Other Noncurrent Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative, fair value, net	6	2
Cash collateral receivable	0	0
Derivative Assets (Liabilities), at Fair Value, Net	6	2
Other Current Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative, fair value, net	(22)	(27)
Cash collateral receivable	15	20
Derivative Assets (Liabilities), at Fair Value, Net	(7)	(7)
Other Noncurrent Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative, fair value, net	(28)	(50)
Cash collateral receivable	9	27
Derivative Assets (Liabilities), at Fair Value, Net	(19)	(23)
Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement	36	21
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement	(53)	(84)
Derivative, fair value, net	(17)	(63)
Net Regulatory Asset (Liability), Unrealized Loss (Gain) On Derivative Contracts	17	62	$ 96	$ 101
Not Designated as Hedging Instrument [Member] | Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement	29	15
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement	(2)	(3)
Derivative, fair value, net	27	12
Not Designated as Hedging Instrument [Member] | Other Noncurrent Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement	6	2
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement	0	0
Derivative, fair value, net	6	2
Not Designated as Hedging Instrument [Member] | Other Current Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement	1	4
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement	(23)	(31)
Derivative, fair value, net	(22)	(27)
Not Designated as Hedging Instrument [Member] | Other Noncurrent Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement	0	0
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement	(28)	(50)
Derivative, fair value, net	$ (28)	$ (50)

Risk Management and Hedging A_4

Risk Management and Hedging Activities - PacifiCorp - Not Designated as Hedging Contracts (Details) - PacifiCorp [Member] - Not Designated as Hedging Instrument [Member] - Commodity Contract [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Regulatory Assets (Liabilities), Net, Derivatives [Roll Forward]
Beginning balance	$ 62	$ 96	$ 101
Changes In Fair Value Derivatives Recognized In Regulatory Assets Or Liabilities, Net	(11)	(37)	12
Net Gains (Losses) Reclassified To Operating Revenue	3	(34)	(68)
Net Gains (Losses) Reclassified To Cost Of Domestic Regulated Electric	(37)	37	51
Ending balance	$ 17	$ 62	$ 96

Risk Management and Hedging A_5

Risk Management and Hedging Activities - PacifiCorp - Derivative Contract Volumes (Details) - PacifiCorp [Member] - Commodity Contract [Member] MWh in Millions, Dth in Millions	Dec. 31, 2020MWhDth	Dec. 31, 2019DthMWh
Electricity purchases (sales), net, in megawatt hours [Member]
Notional Amounts of Outstanding Derivative Positions [Line Items]
Derivative, nonmonetary notional amount | MWh	1	2
Natural gas purchases (sales), in decatherms [Member]
Notional Amounts of Outstanding Derivative Positions [Line Items]
Derivative, nonmonetary notional amount | Dth	100	129

Risk Management and Hedging A_6

Risk Management and Hedging Activities - PacifiCorp - Collateral and Contingent Features (Details) - PacifiCorp [Member] - Commodity Contract [Member] - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Derivative [Line Items]
Derivative, Net Liability Position, Aggregate Fair Value	$ 51	$ 80
Collateral Already Posted, Aggregate Fair Value	24	47
Additional Collateral, Aggregate Fair Value	$ 25	$ 27

Risk Management and Hedging A_7

Risk Management and Hedging Activities - EEGH- Balance Sheet Location (Details) - Eastern Energy Gas Holdings, LLC [Member] - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Derivatives, Fair Value [Line Items]
Derivative, fair value, net	$ 11	$ (78)
Cash collateral receivable	0	0
Total - net basis	11	(78)
Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative, fair value, net	0	0
Cash collateral receivable	0	0
Total - net basis	0	0
Other Noncurrent Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative, fair value, net	20	8
Cash collateral receivable	0	0
Total - net basis	20	8
Other Current Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative, fair value, net	(9)	(33)
Cash collateral receivable	0	0
Total - net basis	(9)	(33)
Other Noncurrent Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative, fair value, net	0	(53)
Cash collateral receivable	0	0
Total - net basis	0	(53)
Interest Rate Contract [Member] | Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative, fair value, net	(6)	(83)
Interest Rate Contract [Member] | Designated as Hedging Instrument [Member] | Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative, fair value, net	0	0
Interest Rate Contract [Member] | Designated as Hedging Instrument [Member] | Other Noncurrent Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative, fair value, net	0	0
Interest Rate Contract [Member] | Designated as Hedging Instrument [Member] | Other Current Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative, fair value, net	(6)	(30)
Interest Rate Contract [Member] | Designated as Hedging Instrument [Member] | Other Noncurrent Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative, fair value, net	0	(53)
Foreign Exchange Contract [Member] | Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative, fair value, net	18	5
Foreign Exchange Contract [Member] | Designated as Hedging Instrument [Member] | Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative, fair value, net	0	0
Foreign Exchange Contract [Member] | Designated as Hedging Instrument [Member] | Other Noncurrent Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative, fair value, net	20	8
Foreign Exchange Contract [Member] | Designated as Hedging Instrument [Member] | Other Current Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative, fair value, net	(2)	(3)
Foreign Exchange Contract [Member] | Designated as Hedging Instrument [Member] | Other Noncurrent Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative, fair value, net	0	$ 0
Commodity Contract [Member] | Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative, fair value, net	(1)
Commodity Contract [Member] | Not Designated as Hedging Instrument [Member] | Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative, fair value, net	0
Commodity Contract [Member] | Not Designated as Hedging Instrument [Member] | Other Noncurrent Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative, fair value, net	0
Commodity Contract [Member] | Not Designated as Hedging Instrument [Member] | Other Current Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative, fair value, net	(1)
Commodity Contract [Member] | Not Designated as Hedging Instrument [Member] | Other Noncurrent Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative, fair value, net	$ 0

Risk Management and Hedging A_8

Risk Management and Hedging Activities - EEGH - Schedule of AOCI (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Derivative [Line Items]
Accumulated other comprehensive loss, net	$ (1,552)	$ (1,706)
Eastern Energy Gas Holdings, LLC [Member]
Derivative [Line Items]
Accumulated other comprehensive loss, net	(53)	$ (187)
Amounts Expected to be Reclassified to Earnings During the Next 12 Months After-Tax	(7)
Eastern Energy Gas Holdings, LLC [Member] | Cash Flow Hedge [Member]
Derivative [Line Items]
Accumulated other comprehensive loss, net	(51)
Interest Rate Contract [Member] | Eastern Energy Gas Holdings, LLC [Member]
Derivative [Line Items]
Amounts Expected to be Reclassified to Earnings During the Next 12 Months After-Tax	$ (5)
Maximum Term	288 months
Interest Rate Contract [Member] | Eastern Energy Gas Holdings, LLC [Member] | Cash Flow Hedge [Member]
Derivative [Line Items]
Accumulated other comprehensive loss, net	$ (45)
Foreign Exchange Contract [Member] | Eastern Energy Gas Holdings, LLC [Member]
Derivative [Line Items]
Amounts Expected to be Reclassified to Earnings During the Next 12 Months After-Tax	$ (2)
Maximum Term	66 months
Foreign Exchange Contract [Member] | Eastern Energy Gas Holdings, LLC [Member] | Cash Flow Hedge [Member]
Derivative [Line Items]
Accumulated other comprehensive loss, net	$ (6)

Risk Management and Hedging A_9

Risk Management and Hedging Activities - EEGH - Gain (Loss) Recognized In Other Comprehensive Income (Details) - Eastern Energy Gas Holdings, LLC [Member] - USD ($) $ in Millions	1 Months Ended	12 Months Ended
	Jul. 31, 2020	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Derivative [Line Items]
Amount of Gain (Loss) Recognized in AOCI on Derivatives (Effective Portion)		$ (92)	$ (85)	$ (21)
Amount of Gain (Loss) Reclassified from AOCI to Income	$ (141)	(132)	(7)	(26)
Commodity [Member]
Derivative [Line Items]
Amount of Gain (Loss) Recognized in AOCI on Derivatives (Effective Portion)			1	1
Amount of Gain (Loss) Reclassified from AOCI to Income			4	(8)
Interest Rate Contract [Member]
Derivative [Line Items]
Amount of Gain (Loss) Recognized in AOCI on Derivatives (Effective Portion)		(104)	(68)	(16)
Interest Rate Contract [Member] | Interest Expense [Member]
Derivative [Line Items]
Amount of Gain (Loss) Reclassified from AOCI to Income		(157)	(5)	(5)
Foreign Exchange Contract [Member]
Derivative [Line Items]
Amount of Gain (Loss) Recognized in AOCI on Derivatives (Effective Portion)		12	(18)	(6)
Foreign Exchange Contract [Member] | Other Nonoperating Income (Expense) [Member]
Derivative [Line Items]
Amount of Gain (Loss) Reclassified from AOCI to Income		$ 25	$ (6)	$ (13)

Risk Management and Hedging _10

Risk Management and Hedging Activities - EEGH - Gain (Loss) Recorded In Income (Details) - Not Designated as Hedging Instrument [Member] - Eastern Energy Gas Holdings, LLC [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Derivative [Line Items]
Amount of Gain (Loss) Recognized in Income on Derivatives	$ 4	$ 0	$ (11)
Interest Rate Contract [Member]
Derivative [Line Items]
Amount of Gain (Loss) Recognized in Income on Derivatives	5	0	0
Commodity Contract [Member]
Derivative [Line Items]
Amount of Gain (Loss) Recognized in Income on Derivatives	$ (1)	$ 0	$ (11)

Risk Management and Hedging _11

Risk Management and Hedging Activities - EEGH - Schedule of Notional Amounts (Details) - Eastern Energy Gas Holdings, LLC [Member] € in Millions, Dth in Millions, $ in Millions	Dec. 31, 2020USD ($)Dth	Dec. 31, 2020EUR (€)Dth	Dec. 31, 2019USD ($)Dth	Dec. 31, 2019EUR (€)Dth
Interest Rate Contract [Member]
Derivative [Line Items]
Notional amount | $	$ 500		$ 1,300
Foreign Exchange Contract [Member]
Derivative [Line Items]
Notional amount | €		€ 250		€ 250
Commodity Contract [Member] | Natural gas purchases (sales), in decatherms [Member]
Derivative [Line Items]
Derivative, nonmonetary notional amount | Dth	5	5	0	0

Risk Management and Hedging _12

Risk Management and Hedging Activities - EEGH - Narrative (Details) $ in Millions	1 Months Ended		12 Months Ended
	Oct. 31, 2020USD ($)	Jul. 31, 2020USD ($)	Dec. 31, 2020USD ($)customer	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)
Eastern Energy Gas Holdings, LLC [Member]
Derivative [Line Items]
Amount of Gain (Loss) Reclassified from AOCI to Income		$ (141)	$ (132)	$ (7)	$ (26)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, after Tax		$ (105)
Hedges settled with cash payment	$ 165
Eastern Gas Transmission and Storage, Inc. [Member]
Derivative [Line Items]
Number of customers serviced | customer			289
Revenue Benchmark [Member] | Customer Concentration Risk [Member] | Eastern Energy Gas Holdings, LLC [Member] | Eastern Energy's Largest Customer [Member]
Derivative [Line Items]
Concentration risk, percentage			17.00%	17.00%
Revenue Benchmark [Member] | Customer Concentration Risk [Member] | Eastern Energy Gas Holdings, LLC [Member] | Export Customers [Member]
Derivative [Line Items]
Concentration risk, percentage			34.00%	34.00%
Revenue, Product and Service Benchmark [Member] | Customer Concentration Risk [Member] | Eastern Gas Transmission and Storage, Inc. [Member] | Storage and Transportation [Member] | Sales Channel, Directly to Consumer [Member]
Derivative [Line Items]
Concentration risk, percentage			98.00%
Revenue, Product and Service Benchmark [Member] | Customer Concentration Risk [Member] | Eastern Gas Transmission and Storage, Inc. [Member] | Ten Largest Customers [Member] | Storage and Transportation [Member]
Derivative [Line Items]
Concentration risk, percentage			37.00%
Revenue, Product and Service Benchmark [Member] | Customer Concentration Risk [Member] | Eastern Gas Transmission and Storage, Inc. [Member] | Thirty Largest Customers [Member] | Storage and Transportation [Member]
Derivative [Line Items]
Concentration risk, percentage			69.00%

Fair Value Measurements (Detail

Fair Value Measurements (Details) - Fair Value, Recurring [Member] - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset	$ (21)	$ (24)
Assets, Fair Value Disclosure	9,918	3,897
Derivative Liability, Fair Value, Gross Asset and Right to Reclaim Cash, Offset	56	103
Derivative Liability	(121)	(76)
Cash collateral receivable (payable), offset against derivative positions	35	79
Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure	7,562	2,649
Derivative Liability	(6)	(6)
Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure	2,180	1,150
Derivative Liability	(152)	(162)
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure	197	122
Derivative Liability	(19)	(11)
Mortgage loans held for sale [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgages Held-for-sale, Fair Value Disclosure	2,001	1,039
Mortgage loans held for sale [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgages Held-for-sale, Fair Value Disclosure	0	0
Mortgage loans held for sale [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgages Held-for-sale, Fair Value Disclosure	2,001	1,039
Mortgage loans held for sale [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgages Held-for-sale, Fair Value Disclosure	0	0
Money market mutual funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI	873	824
Money market mutual funds [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI	873	824
Money market mutual funds [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI	0	0
Money market mutual funds [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI	0	0
United States government obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	200	189
United States government obligations [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	200	189
United States government obligations [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	0	0
United States government obligations [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	0	0
International governement obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	5	4
International governement obligations [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	0	0
International governement obligations [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	5	4
International governement obligations [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	0	0
Corporate obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	73	58
Corporate obligations [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	0	0
Corporate obligations [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	73	58
Corporate obligations [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	0	0
Municipal Bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	2	1
Municipal Bonds [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	0	0
Municipal Bonds [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	2	1
Municipal Bonds [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	0	0
Agency, asset and mortgage-backed obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	6	1
Agency, asset and mortgage-backed obligations [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	0	0
Agency, asset and mortgage-backed obligations [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	6	1
Agency, asset and mortgage-backed obligations [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	0	0
United States companies [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI	381	336
United States companies [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI	381	336
United States companies [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI	0	0
United States companies [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI	0	0
International companies [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI	5,906	1,131
International companies [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI	5,906	1,131
International companies [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI	0	0
International companies [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI	0	0
Investment funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI	201	169
Investment funds [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI	201	169
Investment funds [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI	0	0
Investment funds [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI	0	0
Commodity Contract [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset	(21)	(24)
Derivative assets	188	129
Derivative Liability, Fair Value, Gross Asset and Right to Reclaim Cash, Offset	56	103
Derivative Liability	(54)	(55)
Commodity Contract [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement	1	0
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement	1	4
Commodity Contract [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement	73	45
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement	90	143
Commodity Contract [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement	135	108
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement	19	11
Interest Rate Swap [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	62	16
Derivative Liability	(65)	(21)
Interest Rate Swap [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement	0	0
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement	5	2
Interest Rate Swap [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement	0	2
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement	60	19
Interest Rate Swap [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement	62	14
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement	0	$ 0
Foreign Exchange Contract [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	20
Derivative Liability	(2)
Foreign Exchange Contract [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement	20
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement	$ 2

Fair Value Measurements - Level

Fair Value Measurements - Level 3 (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Commodity [Member]
Fair Value, Assets (Liabilities), Net, Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	$ 97	$ 99	$ 94
Fair Value, Assets and Liabilities Measured on Recurring Basis, Gain (Loss) Included in Earnings	10	(10)	(1)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Other Comprehensive Income (Loss)	0	(1)	2
Fair Value, Measurements with Unobservable Inputs Reconciliation, Recurring Basis, Gain (Loss) Included In Regulatory Assets and Liabilities, Net	17	26	(3)
Purchases	5	6	3
Settlements	(41)	(9)	4
Ending balance	116	97	99
Interest Rate Lock Commitments [Member]
Fair Value, Assets (Liabilities), Net, Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	14	10	9
Fair Value, Assets and Liabilities Measured on Recurring Basis, Gain (Loss) Included in Earnings	(772)	(479)	(181)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Other Comprehensive Income (Loss)	0	0	0
Fair Value, Measurements with Unobservable Inputs Reconciliation, Recurring Basis, Gain (Loss) Included In Regulatory Assets and Liabilities, Net	0	0	0
Purchases	0	0	0
Settlements	724	475	180
Ending balance	$ 62	$ 14	$ 10

Fair Value Measurements - Debt

Fair Value Measurements - Debt (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term Debt	$ 49,866	$ 39,353
Fair Value, Inputs, Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term Debt, Fair Value	$ 60,633	$ 46,004

Fair Value Measurements - Pacif

Fair Value Measurements - PacifiCorp (Details) - USD ($) $ in Millions		Dec. 31, 2020	Dec. 31, 2019
Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset		$ (21)	$ (24)
Assets, Fair Value Disclosure		9,918	3,897
Derivative Liability, Fair Value, Gross Asset and Right to Reclaim Cash, Offset		56	103
Derivative Liability		(121)	(76)
Cash collateral receivable		35	79
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure		7,562	2,649
Derivative Liability		(6)	(6)
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure		2,180	1,150
Derivative Liability		(152)	(162)
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure		197	122
Derivative Liability		(19)	(11)
Commodity Contract [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset		(21)	(24)
Derivative assets		188	129
Derivative Liability, Fair Value, Gross Asset and Right to Reclaim Cash, Offset		56	103
Derivative Liability		(54)	(55)
Commodity Contract [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement		1	0
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement		1	4
Commodity Contract [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement		73	45
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement		90	143
Commodity Contract [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement		135	108
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement		19	11
Money market mutual funds [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		873	824
Money market mutual funds [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		873	824
Money market mutual funds [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		0	0
Money market mutual funds [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		0	0
Investment funds [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		201	169
Investment funds [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		201	169
Investment funds [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		0	0
Investment funds [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		0	0
PacifiCorp [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure		64	62
PacifiCorp [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure		31	48
PacifiCorp [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure		36	21
PacifiCorp [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure		0	0
PacifiCorp [Member] | Commodity Contract [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash collateral receivable		24	47
PacifiCorp [Member] | Commodity Contract [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset	[1]	(3)	(7)
Derivative assets		33	14
Derivative Liability, Fair Value, Gross Asset and Right to Reclaim Cash, Offset	[1]	27	54
Derivative Liability		(26)	(30)
Cash collateral receivable		24	47
PacifiCorp [Member] | Commodity Contract [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement		0	0
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement		0	0
PacifiCorp [Member] | Commodity Contract [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement		36	21
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement		53	84
PacifiCorp [Member] | Commodity Contract [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement		0	0
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement			0
PacifiCorp [Member] | Money market mutual funds [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI	[2]	6	23
PacifiCorp [Member] | Money market mutual funds [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI	[2]	6	23
PacifiCorp [Member] | Money market mutual funds [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI	[2]	0	0
PacifiCorp [Member] | Money market mutual funds [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI	[2]	0	0
PacifiCorp [Member] | Investment funds [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		25	25
PacifiCorp [Member] | Investment funds [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		25	25
PacifiCorp [Member] | Investment funds [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		0	0
PacifiCorp [Member] | Investment funds [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		$ 0	$ 0
[1]	Represents netting under master netting arrangements and a net cash collateral receivable of $24 million and $47 million as of December 31, 2020 and 2019, respectively.
[2]	Amounts are included in cash and cash equivalents, other current assets and other assets on the Consolidated Balance Sheets. The fair value of these money market mutual funds approximates cost.

Fair Value Measurements - Pac_2

Fair Value Measurements - PacifiCorp - Debt (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term Debt	$ 49,866	$ 39,353
Fair Value, Inputs, Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term Debt, Fair Value	60,633	46,004
PacifiCorp [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term Debt	8,612	7,658
PacifiCorp [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term Debt, Fair Value	$ 10,995	$ 9,280

Fair Value Measurements - MEC (

Fair Value Measurements - MEC (Details) - Fair Value, Recurring [Member] - USD ($) $ in Millions		Dec. 31, 2020	Dec. 31, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure		$ 9,918	$ 3,897
Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset		(21)	(24)
Derivative Liability		121	76
Derivative Liability, Fair Value, Gross Asset and Right to Reclaim Cash, Offset		56	103
Cash collateral receivable		35	79
Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure		7,562	2,649
Derivative Liability		6	6
Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure		2,180	1,150
Derivative Liability		152	162
Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure		197	122
Derivative Liability		19	11
Commodity Contract [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset		(21)	(24)
Derivative Liability		54	55
Derivative Liability, Fair Value, Gross Asset and Right to Reclaim Cash, Offset		56	103
Commodity Contract [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement		1	0
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement		(1)	(4)
Commodity Contract [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement		73	45
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement		(90)	(143)
Commodity Contract [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement		135	108
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement		(19)	(11)
Interest Rate Swap [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liability		65	21
Interest Rate Swap [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement		0	0
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement		(5)	(2)
Interest Rate Swap [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement		0	2
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement		(60)	(19)
Interest Rate Swap [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement		62	14
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement		0	0
MidAmerican Energy Company [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure		738	889
Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset	[1]	(5)	(1)
Cash collateral receivable		0	1
MidAmerican Energy Company [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure		648	823
MidAmerican Energy Company [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure		90	66
MidAmerican Energy Company [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure		5	1
MidAmerican Energy Company [Member] | Commodity Contract [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement		4	2
Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset		(5)	(1)	[1]
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement		(2)	(7)
Derivative Liability, Fair Value, Gross Asset and Right to Reclaim Cash, Offset	[1]	5	2
MidAmerican Energy Company [Member] | Commodity Contract [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement		0	0
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement		0	0
MidAmerican Energy Company [Member] | Commodity Contract [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement		4	2
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement		(4)	(9)
MidAmerican Energy Company [Member] | Commodity Contract [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement		5	1
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement		(3)	0
Money market mutual funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		873	824
Money market mutual funds [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		873	824
Money market mutual funds [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		0	0
Money market mutual funds [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		0	0
Money market mutual funds [Member] | MidAmerican Energy Company [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		41	274	[2]
Money market mutual funds [Member] | MidAmerican Energy Company [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		41	274	[2]
Money market mutual funds [Member] | MidAmerican Energy Company [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		0	0	[2]
Money market mutual funds [Member] | MidAmerican Energy Company [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		0	0	[2]
US Treasury Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale		200	189
US Treasury Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale		200	189
US Treasury Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale		0	0
US Treasury Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale		0	0
US Treasury Securities [Member] | MidAmerican Energy Company [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale		200	189
US Treasury Securities [Member] | MidAmerican Energy Company [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale		200	189
US Treasury Securities [Member] | MidAmerican Energy Company [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale		0	0
US Treasury Securities [Member] | MidAmerican Energy Company [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale		0	0
Debt Security, Government, Non-US [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale		5	4
Debt Security, Government, Non-US [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale		0	0
Debt Security, Government, Non-US [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale		5	4
Debt Security, Government, Non-US [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale		0	0
Debt Security, Government, Non-US [Member] | MidAmerican Energy Company [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale		5	4
Debt Security, Government, Non-US [Member] | MidAmerican Energy Company [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale		0	0
Debt Security, Government, Non-US [Member] | MidAmerican Energy Company [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale		5	4
Debt Security, Government, Non-US [Member] | MidAmerican Energy Company [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale		0	0
Debt Security, Corporate, US [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale		73	58
Debt Security, Corporate, US [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale		0	0
Debt Security, Corporate, US [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale		73	58
Debt Security, Corporate, US [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale		0	0
Debt Security, Corporate, US [Member] | MidAmerican Energy Company [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale		73	58
Debt Security, Corporate, US [Member] | MidAmerican Energy Company [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale		0	0
Debt Security, Corporate, US [Member] | MidAmerican Energy Company [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale		73	58
Debt Security, Corporate, US [Member] | MidAmerican Energy Company [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale		0	0
Municipal Bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale		2	1
Municipal Bonds [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale		0	0
Municipal Bonds [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale		2	1
Municipal Bonds [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale		0	0
Municipal Bonds [Member] | MidAmerican Energy Company [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale		2	1
Municipal Bonds [Member] | MidAmerican Energy Company [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale		0	0
Municipal Bonds [Member] | MidAmerican Energy Company [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale		2	1
Municipal Bonds [Member] | MidAmerican Energy Company [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale		0	0
US Government-sponsored Enterprises Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale		6	1
US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale		0	0
US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale		6	1
US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale		0	0
US Government-sponsored Enterprises Debt Securities [Member] | MidAmerican Energy Company [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale		6	1
US Government-sponsored Enterprises Debt Securities [Member] | MidAmerican Energy Company [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale		0	0
US Government-sponsored Enterprises Debt Securities [Member] | MidAmerican Energy Company [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale		6	1
US Government-sponsored Enterprises Debt Securities [Member] | MidAmerican Energy Company [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale		0	0
Domestic Equity Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		381	336
Domestic Equity Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		381	336
Domestic Equity Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		0	0
Domestic Equity Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		0	0
Domestic Equity Securities [Member] | MidAmerican Energy Company [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		381	336
Domestic Equity Securities [Member] | MidAmerican Energy Company [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		381	336
Domestic Equity Securities [Member] | MidAmerican Energy Company [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		0	0
Domestic Equity Securities [Member] | MidAmerican Energy Company [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		0	0
Foreign Equity Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		5,906	1,131
Foreign Equity Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		5,906	1,131
Foreign Equity Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		0	0
Foreign Equity Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		0	0
Foreign Equity Securities [Member] | MidAmerican Energy Company [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		9	9
Foreign Equity Securities [Member] | MidAmerican Energy Company [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		9	9
Foreign Equity Securities [Member] | MidAmerican Energy Company [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		0	0
Foreign Equity Securities [Member] | MidAmerican Energy Company [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		0	0
Equity Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		201	169
Equity Funds [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		201	169
Equity Funds [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		0	0
Equity Funds [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		0	0
Equity Funds [Member] | MidAmerican Energy Company [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		17	15
Equity Funds [Member] | MidAmerican Energy Company [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		17	15
Equity Funds [Member] | MidAmerican Energy Company [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		0	0
Equity Funds [Member] | MidAmerican Energy Company [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		$ 0	$ 0
[1]	Represents netting under master netting arrangements and a net cash collateral receivable of $— million and $1 million as of December 31, 2020 and 2019, respectively.
[2]	Amounts are included in cash and cash equivalents and investments and restricted investments on the Balance Sheets. The fair value of these money market mutual funds approximates cost.

Fair Value Measurements - MEC -

Fair Value Measurements - MEC - Debt (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term Debt	$ 49,866	$ 39,353
Fair Value, Inputs, Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term Debt, Fair Value	60,633	46,004
MidAmerican Energy Company [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term Debt	7,210	7,208
Long-term Debt, Fair Value		$ 8,283
MidAmerican Energy Company [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term Debt, Fair Value	$ 9,130

Fair Value Measurements - MidAm

Fair Value Measurements - MidAmerican Funding - Debt (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term Debt	$ 49,866	$ 39,353
Fair Value, Inputs, Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term Debt, Fair Value	60,633	46,004
MidAmerican Funding, LLC and Subsidiaries [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term Debt	7,450	7,448
Long-term Debt, Fair Value		$ 8,599
MidAmerican Funding, LLC and Subsidiaries [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term Debt, Fair Value	$ 9,466

Fair Value Measurements - NPC (

Fair Value Measurements - NPC (Details) - Fair Value, Recurring [Member] - USD ($) $ in Millions		Dec. 31, 2020	Dec. 31, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure		$ 9,918	$ 3,897
Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure		7,562	2,649
Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure		2,180	1,150
Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure		197	122
Money Market Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		873	824
Money Market Funds [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		873	824
Money Market Funds [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		0	0
Money Market Funds [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		0	0
Equity Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		201	169
Equity Funds [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		201	169
Equity Funds [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		0	0
Equity Funds [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		0	0
Commodity Contract [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets		188	129
Commodity Contract [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement		(1)	(4)
Commodity Contract [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement		(90)	(143)
Commodity Contract [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement		(19)	(11)
Nevada Power Company [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure		49	12
Nevada Power Company [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure		23	12
Nevada Power Company [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure		0	0
Nevada Power Company [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure		26	0
Nevada Power Company [Member] | Money Market Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI	[1]	21	10
Nevada Power Company [Member] | Money Market Funds [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI	[1]	21	10
Nevada Power Company [Member] | Money Market Funds [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI	[1]	0	0
Nevada Power Company [Member] | Money Market Funds [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI	[1]	0	0
Nevada Power Company [Member] | Equity Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		2	2
Nevada Power Company [Member] | Equity Funds [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		2	2
Nevada Power Company [Member] | Equity Funds [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		0	0
Nevada Power Company [Member] | Equity Funds [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		0	0
Nevada Power Company [Member] | Commodity Contract [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets		26
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement		(11)	(8)
Nevada Power Company [Member] | Commodity Contract [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets		0
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement		0	0
Nevada Power Company [Member] | Commodity Contract [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets		0
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement		0	0
Nevada Power Company [Member] | Commodity Contract [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets		26
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement		$ (11)	$ (8)
[1]	Amounts are included in cash and cash equivalents on the Consolidated Balance Sheets. The fair value of these money market mutual funds approximates cost.

Fair Value Measurements - NPC -

Fair Value Measurements - NPC - Level 3 (Details) - Commodity [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	$ 97	$ 99	$ 94
Fair Value, Measurements with Unobservable Inputs Reconciliation, Recurring Basis, Gain (Loss) Included In Regulatory Assets and Liabilities, Net	17	26	(3)
Settlements	(41)	(9)	4
Ending balance	116	97	99
Nevada Power Company [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	(8)	3	(3)
Fair Value, Measurements with Unobservable Inputs Reconciliation, Recurring Basis, Gain (Loss) Included In Regulatory Assets and Liabilities, Net	(17)	(21)	4
Settlements	40	10	2
Ending balance	$ 15	$ (8)	$ 3

Fair Value Measurements - NPC_2

Fair Value Measurements - NPC - Debt (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term Debt	$ 49,866	$ 39,353
Fair Value, Inputs, Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term Debt, Fair Value	60,633	46,004
Nevada Power Company [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term Debt	2,496	2,351
Nevada Power Company [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term Debt, Fair Value	$ 3,245	$ 2,848

Fair Value Measurements - SPPC

Fair Value Measurements - SPPC (Details) - Fair Value, Recurring [Member] - USD ($) $ in Millions		Dec. 31, 2020	Dec. 31, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure		$ 9,918	$ 3,897
Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure		7,562	2,649
Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure		2,180	1,150
Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure		197	122
Commodity Contract [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement		1	0
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement		(1)	(4)
Commodity Contract [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement		73	45
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement		(90)	(143)
Commodity Contract [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement		135	108
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement		(19)	(11)
Money Market Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		873	824
Money Market Funds [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		873	824
Money Market Funds [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		0	0
Money Market Funds [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		0	0
Sierra Pacific Power Company [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure	[1]	26
Sierra Pacific Power Company [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure	[1]	17
Sierra Pacific Power Company [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure	[1]	0
Sierra Pacific Power Company [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure	[1]	9
Sierra Pacific Power Company [Member] | Commodity Contract [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement		(2)	(1)
Sierra Pacific Power Company [Member] | Commodity Contract [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement		0	0
Sierra Pacific Power Company [Member] | Commodity Contract [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement		0	0
Sierra Pacific Power Company [Member] | Commodity Contract [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement		(2)	(1)
Sierra Pacific Power Company [Member] | Commodity [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement		9
Sierra Pacific Power Company [Member] | Commodity [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement		0
Sierra Pacific Power Company [Member] | Commodity [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement		0
Sierra Pacific Power Company [Member] | Commodity [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement		9
Sierra Pacific Power Company [Member] | Money Market Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		17	25	[1]
Sierra Pacific Power Company [Member] | Money Market Funds [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		17	25	[1]
Sierra Pacific Power Company [Member] | Money Market Funds [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		0	0	[1]
Sierra Pacific Power Company [Member] | Money Market Funds [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		$ 0	$ 0	[1]
[1]	Amounts are included in cash and cash equivalents on the Balance Sheets. The fair value of these money market mutual funds approximates cost.

Fair Value Measurements - SPP_2

Fair Value Measurements - SPPC - Debt (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term Debt	$ 49,866	$ 39,353
Fair Value, Inputs, Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term Debt, Fair Value	60,633	46,004
Sierra Pacific Power Company [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term Debt	1,164	1,135
Sierra Pacific Power Company [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term Debt, Fair Value	$ 1,358	$ 1,258

Fair Value Measurements - EEGH

Fair Value Measurements - EEGH - Debt (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term Debt	$ 49,866	$ 39,353
Eastern Energy Gas Holdings, LLC [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term Debt	4,425	5,520
Long-term Debt, Fair Value	$ 5,012	$ 5,738

Other, Net - MEC (Details)

Other, Net - MEC (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Component of Other Income (Expense), Nonoperating [Line Items]
Other, net	$ 88	$ 97	$ (9)
MidAmerican Energy Company [Member]
Component of Other Income (Expense), Nonoperating [Line Items]
Other, net	52	50	30
MidAmerican Energy Company [Member] | Defined Benefit Retirement Plans, Non-service Cost Components [Member]
Component of Other Income (Expense), Nonoperating [Line Items]
Other, net	24	17	21
MidAmerican Energy Company [Member] | Corporate Owned Life Insurance Income (Loss) [Member]
Component of Other Income (Expense), Nonoperating [Line Items]
Other, net	16	24	6
MidAmerican Energy Company [Member] | Gains (Losses) on Disposition of Assets [Member]
Component of Other Income (Expense), Nonoperating [Line Items]
Other, net	6	0	0
MidAmerican Energy Company [Member] | Interest Income and Other Net [Member]
Component of Other Income (Expense), Nonoperating [Line Items]
Other, net	$ 6	$ 9	$ 3

Other, Net - MidAmerican Fundin

Other, Net - MidAmerican Funding (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Component of Other Income (Expense), Nonoperating [Line Items]
Other, net	$ 88	$ 97	$ (9)
MidAmerican Funding, LLC and Subsidiaries [Member]
Component of Other Income (Expense), Nonoperating [Line Items]
Other, net	52	52	31
MidAmerican Funding, LLC and Subsidiaries [Member] | Defined Benefit Retirement Plans, Non-service Cost Components [Member]
Component of Other Income (Expense), Nonoperating [Line Items]
Other, net	24	17	21
MidAmerican Funding, LLC and Subsidiaries [Member] | Corporate Owned Life Insurance Income (Loss) [Member]
Component of Other Income (Expense), Nonoperating [Line Items]
Other, net	16	24	6
MidAmerican Funding, LLC and Subsidiaries [Member] | Gains (Losses) on Disposition of Assets [Member]
Component of Other Income (Expense), Nonoperating [Line Items]
Other, net	6	0	0
MidAmerican Funding, LLC and Subsidiaries [Member] | Interest Income and Other Net [Member]
Component of Other Income (Expense), Nonoperating [Line Items]
Other, net	$ 6	$ 11	$ 4

Income Taxes - Tax Reform (Deta

Income Taxes - Tax Reform (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Components of Income Tax Expense (Benefit) [Line Items]
Current Income Tax Expense (Benefit)		$ (1,572)	$ (888)	$ (591)
Federal statutory income tax rate		21.00%	21.00%	21.00%	35.00%
Deferred Tax Liabilities, Net		$ 11,775	$ 9,653
Regulatory Liabilities		7,475	7,311
Deferred Income Tax Expense (Benefit)		1,883	296	$ 14
Net income (loss) attributable to parent		6,943	2,950	2,568
Income tax expense (benefit)		308	(598)	(583)
Equity income (loss)		(149)	(44)	43
Reclassification of long-term income tax receivable				609
Long-term income tax receivable adjustments		128	40	17
Related Party Transaction, Cash Received for Income Taxes, Net		1,504	942	884
Deferred Income Tax Charge [Member]
Components of Income Tax Expense (Benefit) [Line Items]
Regulatory Liabilities	[1]	3,600	3,611
Tax Cuts and Jobs Act of 2017 [Member]
Components of Income Tax Expense (Benefit) [Line Items]
Federal statutory income tax rate					21.00%
Iowa Senate File 2417, Rate Effective Starting 2021 [Member]
Components of Income Tax Expense (Benefit) [Line Items]
Deferred Tax Liabilities, Net		61
Deferred Income Tax Expense (Benefit)		2
Iowa Senate File 2417, Rate Effective Starting 2021 [Member] | Deferred Income Tax Charge [Member]
Components of Income Tax Expense (Benefit) [Line Items]
Increase in Regulatory Liability		59
State and Local Jurisdiction [Member]
Components of Income Tax Expense (Benefit) [Line Items]
Operating Loss Carryforwards	[2]	7,190
State and Local Jurisdiction [Member] | Iowa Senate File 2417, Rate Effective Starting 2021 [Member]
Components of Income Tax Expense (Benefit) [Line Items]
Operating Loss Carryforwards		$ 138	79
Maximum [Member] | IOWA | Tax Year, Current [Member]
Components of Income Tax Expense (Benefit) [Line Items]
Statutory Income Tax Rate, State and Local, Percent		12.00%
Maximum [Member] | IOWA | Iowa Senate File 2417, Rate Effective Starting 2021 [Member]
Components of Income Tax Expense (Benefit) [Line Items]
Statutory Income Tax Rate, State and Local, Percent		9.80%
Long-term income tax receivable [Member]
Components of Income Tax Expense (Benefit) [Line Items]
Reclassification of long-term income tax receivable				609
Long-term income tax receivable adjustments		$ 128	73	$ 152
Long-term income tax receivable [Member] | Iowa Senate File 2417, Rate Effective Starting 2021 [Member]
Components of Income Tax Expense (Benefit) [Line Items]
Reclassification of long-term income tax receivable		609
Long-term income tax receivable adjustments		$ 115
Parent Company [Member]
Components of Income Tax Expense (Benefit) [Line Items]
Related Party Transaction, Cash Received for Income Taxes, Net			$ 90
[1]	Amounts primarily represent income tax liabilities related to the federal tax rate change from 35% to 21% that are probable to be passed on to customers, offset by income tax benefits related to certain property-related basis differences and other various differences that were previously passed on to customers and will be included in regulated rates when the temporary differences reverse.
[2]	The federal net operating loss carryforwards relate principally to net operating loss carryforwards of subsidiaries that are tax residents in both the United States and the United Kingdom. The federal net operating loss carryforwards were generated prior to Berkshire Hathaway Inc.'s ownership and will begin to expire in 2021.

Income Taxes - Components of In

Income Taxes - Components of Income Tax Expense (Benefit) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Nov. 01, 2020
Components of Income Tax Expense (Benefit) [Line Items]
Current Federal Tax Expense (Benefit)	$ (1,537)	$ (956)	$ (686)
Current State and Local Tax Expense (Benefit)	(121)	(13)	(9)
Current foreign	86	81	104
Current Income Tax Expense (Benefit)	(1,572)	(888)	(591)
Deferred Federal Income Tax Expense (Benefit)	1,438	431	165
Deferred foreign	21	(8)	(20)
Deferred State and Local Income Tax Expense (Benefit)	424	(127)	(131)
Deferred Income Tax Expense (Benefit)	1,883	296	14
Other Tax Expense (Benefit)	(3)	(6)	(6)
Total income tax expense (benefit)	308	(598)	(583)
Goodwill	$ 11,506	$ 9,722	$ 9,595
Natural Gas Transmission and Storage Business Acquisition [Member]
Components of Income Tax Expense (Benefit) [Line Items]
Goodwill				$ 1,732
Natural Gas Transmission and Storage Business Acquisition [Member] | Goodwill [Member]
Components of Income Tax Expense (Benefit) [Line Items]
Finite-Lived Intangible Asset, Useful Life	15 years
Natural Gas Transmission and Storage Business Acquisition [Member] | Domestic Tax Authority and State and Local Jurisdiction
Components of Income Tax Expense (Benefit) [Line Items]
Goodwill				$ 900

Income Taxes - Reconciliation o

Income Taxes - Reconciliation of Effective Income Tax Rate (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Abstract]
Federal statutory income tax rate	21.00%	21.00%	21.00%	35.00%
Income tax credits	(16.00%)	(32.00%)	(30.00%)
Effective Income Tax Rate Reconciliation Regulatory Differences	(3.00%)	(6.00%)	(8.00%)
State income tax, net of federal income tax benefit	3.00%	(5.00%)	(6.00%)
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Percent	0.00%	0.00%	(4.00%)
Income tax effect of foreign income	0.00%	(2.00%)	(3.00%)
Equity income	0.00%	0.00%	(1.00%)
Other, net	(1.00%)	(1.00%)	(1.00%)
Effective income tax rate	4.00%	(25.00%)	(30.00%)
Production Tax Credit Carryforwards [Abstract]
Years Eligible For Renewable Energy Production Tax Credit	10 years
Deferred Income Tax Expense (Benefit), Continuing Operations [Abstract]
Deferred state	$ (424)	$ 127	$ 131
UNITED KINGDOM
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Abstract]
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount	$ 35
Corporate Income Tax Rate, Effective April 1, 2020 [Member] | UNITED KINGDOM
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Abstract]
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Percent	(19.00%)
Corporate Income Tax Rate, Effective April 1, 2020 further reduction [Member] | UNITED KINGDOM
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Abstract]
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Percent	(17.00%)
PacifiCorp [Member]
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Abstract]
Federal statutory income tax rate	21.00%	21.00%	21.00%	35.00%
Income tax credits	(13.00%)	(3.00%)	(7.00%)
Effective Income Tax Rate Reconciliation Regulatory Differences	(22.00%)	(13.00%)	(17.00%)
State income tax, net of federal income tax benefit	(3.00%)	(3.00%)	(4.00%)
Other, net	0.00%	(1.00%)	0.00%
Effective income tax rate	(11.00%)	7.00%	1.00%
Deferred Income Tax Expense (Benefit), Continuing Operations [Abstract]
Deferred state	$ (1)	$ (4)	$ 9
Parent Company [Member]
Deferred Income Tax Expense (Benefit), Continuing Operations [Abstract]
Income Taxes Receivable From (Payable To) Related Parties Current	$ 13	$ 76

Income Taxes - Related Party In

Income Taxes - Related Party Income Taxes (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Related Party Transaction [Line Items]
Long-term income tax receivable		$ 658	$ 530
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent		21.00%	21.00%	21.00%	35.00%
Parent Company [Member]
Related Party Transaction [Line Items]
Income Taxes Receivable From (Payable To) Related Parties Current		$ 13	$ 76
Long-term income tax receivable		658	530
State and Local Jurisdiction [Member]
Related Party Transaction [Line Items]
Operating Loss Carryforwards	[1]	7,190
Iowa Senate File 2417, Rate Effective Starting 2021 [Member] | State and Local Jurisdiction [Member]
Related Party Transaction [Line Items]
Operating Loss Carryforwards		$ 138	$ 79
[1]	The federal net operating loss carryforwards relate principally to net operating loss carryforwards of subsidiaries that are tax residents in both the United States and the United Kingdom. The federal net operating loss carryforwards were generated prior to Berkshire Hathaway Inc.'s ownership and will begin to expire in 2021.

Income Taxes - Components of Ne

Income Taxes - Components of Net Deferred Income Tax Liability (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Deferred income tax assets: [Abstract]
Federal, state and foreign carryforwards	$ 677	$ 575
Regulatory liabilities	1,420	1,610
AROs	304	306
Other	777	590
Total deferred income tax assets	3,178	3,081
Valuation allowances	(204)	(143)
Total deferred income tax assets, net	2,974	2,938
Deferred income tax liabilities: [ Abstract]
Property-related items	(10,816)	(10,439)
Regulatory assets	(785)	(631)
Investments	(2,821)	(1,137)
Other	(327)	(384)
Total deferred income tax liabilities	(14,749)	(12,591)
Net deferred income tax liability	$ (11,775)	$ (9,653)

Income Taxes - Summary of Opera

Income Taxes - Summary of Operating Loss Carryforwards (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Operating Loss Carryforwards [Line Items]
Current Income Tax Expense (Benefit)		$ 1,572	$ 888	$ 591
Federal [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	[1]	302
Deferred Tax Assets, Operating Loss Carryforwards		63
Deferred Tax Assets, Tax Credit Carryforwards		15
State and Local Jurisdiction [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	[1]	7,190
Deferred Tax Assets, Operating Loss Carryforwards		409
Deferred Tax Assets, Tax Credit Carryforwards		28
Foreign Tax Authority [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	[1]	704
Deferred Tax Assets, Operating Loss Carryforwards		162
Deferred Tax Assets, Tax Credit Carryforwards		0
Income Tax Authority, Name [Domain]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	[1]	8,196
Deferred Tax Assets, Operating Loss Carryforwards		634
Deferred Tax Assets, Tax Credit Carryforwards		$ 43
[1]	The federal net operating loss carryforwards relate principally to net operating loss carryforwards of subsidiaries that are tax residents in both the United States and the United Kingdom. The federal net operating loss carryforwards were generated prior to Berkshire Hathaway Inc.'s ownership and will begin to expire in 2021.

Income Taxes - Net Unrecognized

Income Taxes - Net Unrecognized Tax Benefits (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Beginning balance	$ 145	$ 185
Additions based on tax positions related to the current year	5	3
Additions for tax positions of prior years	6	13
Reductions for tax positions of prior years	(1)	(37)
Statute of limitations	(4)	(9)
Settlements	1	5
Interest and penalties	1	5
Ending balance	153	145
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	$ 141	$ 139

Income Taxes - PacifiCorp - Tax

Income Taxes - PacifiCorp - Tax Reform (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Components of Income Tax Expense (Benefit) [Line Items]
Federal statutory income tax rate	21.00%	21.00%	21.00%	35.00%
Deferred Income Tax Expense (Benefit)	$ 1,883	$ 296	$ 14
Deferred Tax Liabilities, Net	11,775	9,653
PacifiCorp [Member]
Components of Income Tax Expense (Benefit) [Line Items]
Amortization of Excess Deferred Income Taxes, Amount	$ 118	$ 91	$ 127
Federal statutory income tax rate	21.00%	21.00%	21.00%	35.00%
Deferred Income Tax Expense (Benefit)	$ (123)	$ (128)	$ (196)
Deferred Tax Liabilities, Net	$ 2,627	$ 2,563
Tax Cuts and Jobs Act of 2017 [Member]
Components of Income Tax Expense (Benefit) [Line Items]
Federal statutory income tax rate				21.00%

Income Taxes - PacifiCorp - Com

Income Taxes - PacifiCorp - Components of Income Tax Expense (Benefit) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Schedule of Income Tax Expense (Benefit) Components [Line Items]
Current Federal Tax Expense (Benefit)	$ (1,537)	$ (956)	$ (686)
Current State and Local Tax Expense (Benefit)	(121)	(13)	(9)
Current Income Tax Expense (Benefit)	(1,572)	(888)	(591)
Deferred Federal Income Tax Expense (Benefit)	1,438	431	165
Deferred State and Local Income Tax Expense (Benefit)	424	(127)	(131)
Deferred Income Tax Expense (Benefit)	1,883	296	14
Other Tax Expense (Benefit)	(3)	(6)	(6)
Income tax expense (benefit)	308	(598)	(583)
PacifiCorp [Member]
Schedule of Income Tax Expense (Benefit) Components [Line Items]
Current Federal Tax Expense (Benefit)	19	158	164
Current State and Local Tax Expense (Benefit)	30	34	40
Current Income Tax Expense (Benefit)	49	192	204
Deferred Federal Income Tax Expense (Benefit)	(124)	(132)	(187)
Deferred State and Local Income Tax Expense (Benefit)	1	4	(9)
Deferred Income Tax Expense (Benefit)	(123)	(128)	(196)
Other Tax Expense (Benefit)	(1)	(3)	(3)
Income tax expense (benefit)	$ (75)	$ 61	$ 5

Income Taxes - PacifiCorp - Rec

Income Taxes - PacifiCorp - Reconciliation of Effective Income Tax Rate (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Schedule of Effective Income Tax Rate Reconciliation [Line Items]
Federal statutory income tax rate	21.00%	21.00%	21.00%	35.00%
State income tax, net of federal income tax benefit	(3.00%)	5.00%	6.00%
Effective Income Tax Rate Reconciliation Regulatory Differences	(3.00%)	(6.00%)	(8.00%)
Income tax credits	(16.00%)	(32.00%)	(30.00%)
Other, net	(1.00%)	(1.00%)	(1.00%)
Effective income tax rate	4.00%	(25.00%)	(30.00%)
Deferred Tax Assets, Tax Credit Carryforwards [Abstract]
Years Eligible For Renewable Energy Production Tax Credit	10 years
PacifiCorp [Member]
Schedule of Effective Income Tax Rate Reconciliation [Line Items]
Federal statutory income tax rate	21.00%	21.00%	21.00%	35.00%
State income tax, net of federal income tax benefit	3.00%	3.00%	4.00%
Effective Income Tax Rate Reconciliation Regulatory Differences	(22.00%)	(13.00%)	(17.00%)
Income tax credits	(13.00%)	(3.00%)	(7.00%)
Other, net	0.00%	(1.00%)	0.00%
Effective income tax rate	(11.00%)	7.00%	1.00%
Deferred Tax Assets, Tax Credit Carryforwards [Abstract]
Amortization of Excess Deferred Income Taxes, Amount	$ 118	$ 91	$ 127
Tax Cuts and Jobs Act of 2017 [Member]
Schedule of Effective Income Tax Rate Reconciliation [Line Items]
Federal statutory income tax rate				21.00%

Income Taxes - PacifiCorp - C_2

Income Taxes - PacifiCorp - Component of Net Deferred Income Tax Liability (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Deferred Tax Assets and Liabilities [Line Items]
Regulatory liabilities	$ 1,420	$ 1,610
AROs	304	306
Other	777	590
Total deferred income tax assets, net	2,974	2,938
Property-related items	(10,816)	(10,439)
Regulatory assets	(785)	(631)
Other	(327)	(384)
Total deferred income tax liabilities	(14,749)	(12,591)
Net deferred income tax liability	(11,775)	(9,653)
PacifiCorp [Member]
Deferred Tax Assets and Liabilities [Line Items]
Regulatory liabilities	700	731
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits	93	83
Deferred Tax Assets, Derivative Instruments And Unamortized Contract Values	17	33
Deferred Tax Assets, Operating Loss and Tax Credit Carryforwards, State and Local	73	70
Deferred Tax Assets, Loss Contingency	63	3
AROs	65	61
Other	66	65
Total deferred income tax assets, net	1,077	1,046
Property-related items	(3,311)	(3,312)
Regulatory assets	(343)	(276)
Other	(50)	(21)
Total deferred income tax liabilities	(3,704)	(3,609)
Net deferred income tax liability	$ (2,627)	$ (2,563)

Income Taxes - PacifiCorp - Sum

Income Taxes - PacifiCorp - Summary of Operating Loss Carryforwards (Details) - State and Local Jurisdiction [Member] $ in Millions	Dec. 31, 2020USD ($)
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	$ 7,190	[1]
Deferred Tax Assets, Operating Loss Carryforwards	409
Deferred Tax Assets, Tax Credit Carryforwards	28
PacifiCorp [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	1,138
Deferred Tax Assets, Operating Loss Carryforwards	53
Deferred Tax Assets, Tax Credit Carryforwards	$ 20
[1]	The federal net operating loss carryforwards relate principally to net operating loss carryforwards of subsidiaries that are tax residents in both the United States and the United Kingdom. The federal net operating loss carryforwards were generated prior to Berkshire Hathaway Inc.'s ownership and will begin to expire in 2021.

Income Taxes - PacifiCorp - Net

Income Taxes - PacifiCorp - Net Unrecognized Tax Benefits (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Tax Contingency [Line Items]
Unrecognized Tax Benefits	$ 153	$ 145	$ 185

Income Taxes - MEC - Components

Income Taxes - MEC - Components of Income Tax Expense (Benefit) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Components of Income Tax Expense (Benefit) [Line Items]
Current Federal Tax Expense (Benefit)	$ (1,537)	$ (956)	$ (686)
Current State and Local Tax Expense (Benefit)	(121)	(13)	(9)
Current Income Tax Expense (Benefit)	(1,572)	(888)	(591)
Deferred Federal Income Tax Expense (Benefit)	1,438	431	165
Deferred State and Local Income Tax Expense (Benefit)	424	(127)	(131)
Deferred Income Tax Expense (Benefit)	1,883	296	14
Other Tax Expense (Benefit)	(3)	(6)	(6)
Income tax (benefit) expense	308	(598)	(583)
MidAmerican Energy Company [Member]
Components of Income Tax Expense (Benefit) [Line Items]
Current Federal Tax Expense (Benefit)	(684)	(478)	(276)
Current State and Local Tax Expense (Benefit)	(94)	(47)	(12)
Current Income Tax Expense (Benefit)	(778)	(525)	(288)
Deferred Federal Income Tax Expense (Benefit)	201	166	42
Deferred State and Local Income Tax Expense (Benefit)	8	(11)	(8)
Deferred Income Tax Expense (Benefit)	209	155	34
Other Tax Expense (Benefit)	(1)	(1)	(1)
Income tax (benefit) expense	$ (570)	$ (371)	$ (255)

Income Taxes - MEC - Reconcilia

Income Taxes - MEC - Reconciliation of Effective Income Tax Rate (Details)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Schedule of Effective Income Tax Rate Reconciliation [Line Items]
Federal statutory income tax rate	21.00%	21.00%	21.00%	35.00%
Effective Income Tax Rate Reconciliation, Tax Credit, Percent	(16.00%)	(32.00%)	(30.00%)
State income tax, net of federal income tax benefit	(3.00%)	5.00%	6.00%
Effective Income Tax Rate Reconciliation Regulatory Differences	(3.00%)	(6.00%)	(8.00%)
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Percent	0.00%	0.00%	(4.00%)
Other, net	(1.00%)	(1.00%)	(1.00%)
Effective income tax rate	4.00%	(25.00%)	(30.00%)
Years Eligible For Renewable Energy Production Tax Credit	10 years
MidAmerican Energy Company [Member]
Schedule of Effective Income Tax Rate Reconciliation [Line Items]
Federal statutory income tax rate	21.00%	21.00%	21.00%	35.00%
Effective Income Tax Rate Reconciliation, Tax Credit, Percent	(199.00%)	(90.00%)	(73.00%)
State income tax, net of federal income tax benefit	(27.00%)	(11.00%)	(4.00%)
Effective Income Tax Rate Reconciliation Regulatory Differences	(17.00%)	(8.00%)	(5.00%)
Other, net	(1.00%)	0.00%	1.00%
Effective income tax rate	(223.00%)	(88.00%)	(60.00%)
Years Eligible For Renewable Energy Production Tax Credit	10 years
Tax Cuts and Jobs Act of 2017 [Member]
Schedule of Effective Income Tax Rate Reconciliation [Line Items]
Federal statutory income tax rate				21.00%
Tax Cuts and Jobs Act of 2017 [Member] | MidAmerican Energy Company [Member]
Schedule of Effective Income Tax Rate Reconciliation [Line Items]
Federal statutory income tax rate			21.00%

Income Taxes - MEC - Componen_2

Income Taxes - MEC - Components of Net Deferred Income Tax Liability (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Deferred Tax Assets and Liabilities [Line Items]
Regulatory liabilities	$ 1,420	$ 1,610
AROs	304	306
Other	777	590
Total deferred income tax assets	3,178	3,081
Valuation allowances	(204)	(143)
Total deferred income tax assets, net	2,974	2,938
Property-related items	(10,816)	(10,439)
Regulatory assets	(785)	(631)
Other	(327)	(384)
Total deferred income tax liabilities	(14,749)	(12,591)
Net deferred income tax liability	(11,775)	(9,653)
MidAmerican Energy Company [Member]
Deferred Tax Assets and Liabilities [Line Items]
Regulatory liabilities	288	368
AROs	229	234
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits	42	26
Other	40	34
Total deferred income tax assets	651	713
Valuation allowances	(25)	(14)
Total deferred income tax assets, net	626	699
Property-related items	(3,583)	(3,253)
Regulatory assets	(97)	(68)
Other	0	(4)
Total deferred income tax liabilities	(3,680)	(3,325)
Net deferred income tax liability	(3,054)	(2,626)
Deferred Tax Assets, Operating Loss and Tax Credit Carryforwards, State and Local	$ 52	$ 51

Income Taxes - MEC - Summary of

Income Taxes - MEC - Summary of Operating Loss Carryforwards (Details) - USD ($) $ in Millions		Dec. 31, 2020	Dec. 31, 2019
Operating Loss Carryforwards [Line Items]
Federal, state and foreign carryforwards		$ 677	$ 575
State and Local Jurisdiction [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	[1]	7,190
MidAmerican Energy Company [Member] | State and Local Jurisdiction [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards		$ 768
[1]	The federal net operating loss carryforwards relate principally to net operating loss carryforwards of subsidiaries that are tax residents in both the United States and the United Kingdom. The federal net operating loss carryforwards were generated prior to Berkshire Hathaway Inc.'s ownership and will begin to expire in 2021.

Income Taxes - MEC - Net Unreco

Income Taxes - MEC - Net Unrecognized Tax Benefits (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Beginning balance	$ 145	$ 185
Additions based on tax positions related to the current year	5	3
Additions for tax positions of prior years	6	13
Reductions for tax positions of prior years	(1)	(37)
Statute of limitations	(4)	(9)
Settlements	(1)	(5)
Interest and penalties	(1)	(5)
Ending balance	153	145
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	141	139
MidAmerican Energy Company [Member]
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Beginning balance	8	10
Additions based on tax positions related to the current year	4	5
Additions for tax positions of prior years	0	10
Unrecognized Tax Benefits, Decrease Resulting from Current Period Tax Positions	(3)	(5)
Reductions for tax positions of prior years	(1)	(12)
Ending balance	8	$ 8
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	$ 26

Income Taxes - MidAmerican Fund

Income Taxes - MidAmerican Funding - Components of Income Tax Expense (Benefit) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Components of Income Tax Expense (Benefit) [Line Items]
Current Federal Tax Expense (Benefit)	$ (1,537)	$ (956)	$ (686)
Current State and Local Tax Expense (Benefit)	(121)	(13)	(9)
Current Income Tax Expense (Benefit)	(1,572)	(888)	(591)
Deferred Federal Income Tax Expense (Benefit)	1,438	431	165
Deferred State and Local Income Tax Expense (Benefit)	424	(127)	(131)
Deferred Income Tax Expense (Benefit)	1,883	296	14
Other Tax Expense (Benefit)	(3)	(6)	(6)
Income tax (benefit) expense	308	(598)	(583)
MidAmerican Funding, LLC and Subsidiaries [Member]
Components of Income Tax Expense (Benefit) [Line Items]
Current Federal Tax Expense (Benefit)	(689)	(480)	(280)
Current State and Local Tax Expense (Benefit)	(96)	(49)	(14)
Current Income Tax Expense (Benefit)	(785)	(529)	(294)
Deferred Federal Income Tax Expense (Benefit)	204	164	42
Deferred State and Local Income Tax Expense (Benefit)	8	(11)	(9)
Deferred Income Tax Expense (Benefit)	212	153	33
Other Tax Expense (Benefit)	(1)	(1)	(1)
Income tax (benefit) expense	$ (574)	$ (377)	$ (262)

Income Taxes - MidAmerican Fu_2

Income Taxes - MidAmerican Funding - Reconciliation of Effective Income Tax Rate (Details)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Schedule of Effective Income Tax Rate Reconciliation [Line Items]
Federal statutory income tax rate	21.00%	21.00%	21.00%	35.00%
Income tax credits	(16.00%)	(32.00%)	(30.00%)
State income tax, net of federal income tax benefit	(3.00%)	5.00%	6.00%
Effective Income Tax Rate Reconciliation Regulatory Differences	(3.00%)	(6.00%)	(8.00%)
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Percent	0.00%	0.00%	(4.00%)
Other, net	(1.00%)	(1.00%)	(1.00%)
Effective income tax rate	4.00%	(25.00%)	(30.00%)
Years Eligible For Renewable Energy Production Tax Credit	10 years
MidAmerican Funding, LLC and Subsidiaries [Member]
Schedule of Effective Income Tax Rate Reconciliation [Line Items]
Federal statutory income tax rate	21.00%	21.00%	21.00%
Income tax credits	(209.00%)	(94.00%)	(76.00%)
State income tax, net of federal income tax benefit	(29.00%)	(12.00%)	(4.00%)
Effective Income Tax Rate Reconciliation Regulatory Differences	(17.00%)	(8.00%)	(6.00%)
Other, net	(1.00%)	0.00%	1.00%
Effective income tax rate	(235.00%)	(93.00%)	(64.00%)
Years Eligible For Renewable Energy Production Tax Credit	10 years
Tax Cuts and Jobs Act of 2017 [Member]
Schedule of Effective Income Tax Rate Reconciliation [Line Items]
Federal statutory income tax rate				21.00%

Income Taxes - MidAmerican Fu_3

Income Taxes - MidAmerican Funding - Components of Net Deferred Income Tax Liability (Details) - USD ($) $ in Millions		Dec. 31, 2020	Dec. 31, 2019
Deferred Tax Assets and Liabilities [Line Items]
Regulatory liabilities		$ 1,420	$ 1,610
AROs		304	306
Other		777	590
Total deferred income tax assets		3,178	3,081
Valuation allowances		(204)	(143)
Total deferred income tax assets, net		2,974	2,938
Property-related items		(10,816)	(10,439)
Regulatory assets		(785)	(631)
Other		(327)	(384)
Total deferred income tax liabilities		(14,749)	(12,591)
Net deferred income tax liability		(11,775)	(9,653)
Federal, state and foreign carryforwards		677	575
MidAmerican Funding, LLC and Subsidiaries [Member]
Deferred Tax Assets and Liabilities [Line Items]
Regulatory liabilities		288	368
AROs		229	234
Deferred Tax Assets, Operating Loss and Tax Credit Carryforwards, State and Local		52	51
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits		43	26
Other		40	39
Total deferred income tax assets		652	718
Valuation allowances		(25)	(14)
Total deferred income tax assets, net		627	704
Property-related items		(3,583)	(3,253)
Regulatory assets		(97)	(68)
Other		1	(4)
Total deferred income tax liabilities		(3,679)	(3,325)
Net deferred income tax liability		(3,052)	$ (2,621)
State and Local Jurisdiction [Member]
Deferred Tax Assets and Liabilities [Line Items]
Operating Loss Carryforwards	[1]	7,190
State and Local Jurisdiction [Member] | MidAmerican Funding, LLC and Subsidiaries [Member]
Deferred Tax Assets and Liabilities [Line Items]
Operating Loss Carryforwards		$ 768
[1]	The federal net operating loss carryforwards relate principally to net operating loss carryforwards of subsidiaries that are tax residents in both the United States and the United Kingdom. The federal net operating loss carryforwards were generated prior to Berkshire Hathaway Inc.'s ownership and will begin to expire in 2021.

Income Taxes - MidAmerican Fu_4

Income Taxes - MidAmerican Funding - Net Unrecognized Tax Benefits (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Beginning balance	$ 145	$ 185
Additions based on tax positions related to the current year	5	3
Additions for tax positions of prior years	6	13
Reductions for tax positions of prior years	(1)	(37)
Statute of limitations	(4)	(9)
Settlements	(1)	(5)
Interest and penalties	(1)	(5)
Ending balance	153	145
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	141	139
MidAmerican Funding, LLC and Subsidiaries [Member]
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Beginning balance	8	10
Additions based on tax positions related to the current year	4	5
Additions for tax positions of prior years	0	10
Unrecognized Tax Benefits, Decrease Resulting from Current Period Tax Positions	(3)	(5)
Reductions for tax positions of prior years	(1)	(12)
Ending balance	8	$ 8
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	$ 26

Income Taxes - NPC - Components

Income Taxes - NPC - Components of Income Tax Expense (Benefit) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Components of Income Tax Expense (Benefit) [Line Items]
Current federal tax expense (benefit)	$ (1,572)	$ (888)	$ (591)
Deferred Federal Income Tax Expense (Benefit)	1,438	431	165
Other Tax Expense (Benefit)	(3)	(6)	(6)
Income tax expense (benefit)	308	(598)	(583)
Nevada Power Company [Member]
Components of Income Tax Expense (Benefit) [Line Items]
Current federal tax expense (benefit)	57	105	84
Deferred Federal Income Tax Expense (Benefit)	(10)	(31)	(13)
Unrecognized Tax Benefits, Period Increase (Decrease)	0	0	2
Other Tax Expense (Benefit)	0	(1)	(1)
Income tax expense (benefit)	$ 47	$ 73	$ 72

Income Taxes - NPC - Reconcilia

Income Taxes - NPC - Reconciliation of Effective Income Tax Rate (Details)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Contingency [Line Items]
Federal statutory income tax rate	21.00%	21.00%	21.00%	35.00%
Effective Income Tax Rate Reconciliation Regulatory Differences	3.00%	6.00%	8.00%
Other, net	(1.00%)	(1.00%)	(1.00%)
Effective income tax rate	4.00%	(25.00%)	(30.00%)
Nevada Power Company [Member]
Income Tax Contingency [Line Items]
Federal statutory income tax rate	21.00%	21.00%	21.00%
Effective Income Tax Rate Reconciliation Regulatory Differences	(8.00%)	0.00%	0.00%
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Merger Charges, Percent	0.00%	0.00%	3.00%
Other, net	1.00%	1.00%	0.00%
Effective income tax rate	14.00%	22.00%	24.00%

Income Taxes - NPC - Componen_2

Income Taxes - NPC - Components of Net Deferred Income Tax Liability (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Deferred Tax Assets and Liabilities [Line Items]
Regulatory liabilities	$ 1,420	$ 1,610
Other	777	590
Total deferred income tax assets	3,178	3,081
Property-related items	(10,816)	(10,439)
Regulatory assets	(785)	(631)
Other	(327)	(384)
Total deferred income tax liabilities	(14,749)	(12,591)
Net deferred income tax liability	(11,775)	(9,653)
Nevada Power Company [Member]
Deferred Tax Assets and Liabilities [Line Items]
Regulatory liabilities	206	211
Deferred Tax Assets, Tax Deferred Expense, Leases	79	99
Employee benefits	8	14
Deferred Tax Assets, Customer Advances	19	19
Other	15	9
Total deferred income tax assets	327	352
Property-related items	(800)	(797)
Regulatory assets	(176)	(166)
Deferred Tax Liabilities, Tax Deferred Expense, Leases	(76)	(95)
Other	(13)	(8)
Total deferred income tax liabilities	(1,065)	(1,066)
Net deferred income tax liability	$ (738)	$ (714)

Income Taxes - SPPC - Component

Income Taxes - SPPC - Components of Income Tax Expense (Benefit) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Components of Income Tax Expense (Benefit) [Line Items]
Current Income Tax Expense (Benefit)	$ (1,572)	$ (888)	$ (591)
Deferred Federal Income Tax Expense (Benefit)	1,438	431	165
Other Tax Expense (Benefit)	(3)	(6)	(6)
Income tax expense (benefit)	308	(598)	(583)
Sierra Pacific Power Company [Member]
Components of Income Tax Expense (Benefit) [Line Items]
Current Income Tax Expense (Benefit)	3	19	23
Deferred Federal Income Tax Expense (Benefit)	12	10	7
Unrecognized Tax Benefits, Period Increase (Decrease)	0	0	1
Other Tax Expense (Benefit)	0	(1)	(1)
Income tax expense (benefit)	$ 15	$ 28	$ 30

Income Taxes - SPPC - Reconcili

Income Taxes - SPPC - Reconciliation of Effective Income Tax Rate (Details)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Schedule of Effective Income Tax Rate Reconciliation [Line Items]
Federal statutory income tax rate	21.00%	21.00%	21.00%	35.00%
Effective Income Tax Rate Reconciliation Regulatory Differences	3.00%	6.00%	8.00%
Effective income tax rate	4.00%	(25.00%)	(30.00%)
Sierra Pacific Power Company [Member]
Schedule of Effective Income Tax Rate Reconciliation [Line Items]
Federal statutory income tax rate	21.00%	21.00%	21.00%
Effective Income Tax Rate Reconciliation Regulatory Differences	(9.00%)	0.00%	0.00%
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Percent	0.00%	0.00%	4.00%
Effective income tax rate	12.00%	21.00%	25.00%

Income Taxes - SPPC - Compone_2

Income Taxes - SPPC - Components of Net Deferred Income Tax Liability (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Deferred Tax Assets and Liabilities [Line Items]
Regulatory liabilities	$ 1,420	$ 1,610
Other	777	590
Total deferred income tax assets	3,178	3,081
Property-related items	(10,816)	(10,439)
Regulatory assets	(785)	(631)
Other	(327)	(384)
Total deferred income tax liabilities	(14,749)	(12,591)
Net deferred income tax liability	(11,775)	(9,653)
Sierra Pacific Power Company [Member]
Deferred Tax Assets and Liabilities [Line Items]
Regulatory liabilities	67	70
Employee benefits	2	6
Deferred Tax Assets, Tax Deferred Expense, Leases	30	13
Deferred Tax Assets, Customer Advances	10	9
Other	8	6
Total deferred income tax assets	117	104
Property-related items	(380)	(370)
Regulatory assets	(74)	(62)
Deferred Tax Liabilities, Tax Deferred Expense, Leases	(30)	(13)
Other	(7)	(6)
Total deferred income tax liabilities	(491)	(451)
Net deferred income tax liability	$ (374)	$ (347)

Income Taxes - MidAmerican Fu_5

Income Taxes - MidAmerican Funding - Tax Rate Change (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Tax Rate Change [Line Items]
Deferred Tax Liabilities, Net	$ 11,775	$ 9,653
Deferred Income Tax Expense (Benefit)	1,883	296	$ 14
MidAmerican Funding, LLC and Subsidiaries [Member]
Income Tax Rate Change [Line Items]
Deferred Tax Liabilities, Net	3,052	2,621
Deferred Income Tax Expense (Benefit)	212	$ 153	$ 33
Iowa Senate File 2417, Rate Effective Starting 2021 [Member]
Income Tax Rate Change [Line Items]
Deferred Tax Liabilities, Net	61
Deferred Income Tax Expense (Benefit)	2
Iowa Senate File 2417, Rate Effective Starting 2021 [Member] | Deferred Income Tax Charge [Member]
Income Tax Rate Change [Line Items]
Increase in Regulatory Liability	$ 59
IOWA | Maximum [Member] | Tax Year, Current [Member]
Income Tax Rate Change [Line Items]
Statutory Income Tax Rate, State and Local, Percent	12.00%
IOWA | Maximum [Member] | Iowa Senate File 2417, Rate Effective Starting 2021 [Member]
Income Tax Rate Change [Line Items]
Statutory Income Tax Rate, State and Local, Percent	9.80%

Income Taxes - MEC - Tax Rate C

Income Taxes - MEC - Tax Rate Change (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Tax Rate Change [Line Items]
Deferred Tax Liabilities, Net	$ 11,775	$ 9,653
Deferred Income Tax Expense (Benefit)	1,883	296	$ 14
Iowa Senate File 2417, Rate Effective Starting 2021 [Member]
Income Tax Rate Change [Line Items]
Deferred Tax Liabilities, Net	61
Deferred Income Tax Expense (Benefit)	$ 2
Maximum [Member] | IOWA | Tax Year, Current [Member]
Income Tax Rate Change [Line Items]
Statutory Income Tax Rate, State and Local, Percent	12.00%
Maximum [Member] | IOWA | Iowa Senate File 2417, Rate Effective Starting 2021 [Member]
Income Tax Rate Change [Line Items]
Statutory Income Tax Rate, State and Local, Percent	9.80%
Deferred Income Tax Charge [Member] | Iowa Senate File 2417, Rate Effective Starting 2021 [Member]
Income Tax Rate Change [Line Items]
Increase in Regulatory Liability	$ 59
MidAmerican Energy Company [Member]
Income Tax Rate Change [Line Items]
Deferred Tax Liabilities, Net	3,054	2,626
Deferred Income Tax Expense (Benefit)	$ 209	$ 155	$ 34

Income Taxes - EEGH - Component

Income Taxes - EEGH - Components of Income Tax Expense (Benefit) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Components of Income Tax Expense (Benefit) [Line Items]
Current Federal Tax Expense (Benefit)	$ (1,537)	$ (956)	$ (686)
Current State and Local Tax Expense (Benefit)	(121)	(13)	(9)
Current Income Tax Expense (Benefit)	(1,572)	(888)	(591)
Deferred Federal Income Tax Expense (Benefit)	1,438	431	165
Deferred State and Local Income Tax Expense (Benefit)	424	(127)	(131)
Deferred Income Tax Expense (Benefit)	1,883	296	14
Income tax expense (benefit)	308	(598)	(583)
Eastern Energy Gas Holdings, LLC [Member]
Components of Income Tax Expense (Benefit) [Line Items]
Current Federal Tax Expense (Benefit)	(20)	130	(227)
Current State and Local Tax Expense (Benefit)	1	17	31
Current Income Tax Expense (Benefit)	(19)	147	(196)
Deferred Federal Income Tax Expense (Benefit)	23	(36)	337
Deferred State and Local Income Tax Expense (Benefit)	(28)	(10)	(17)
Deferred Income Tax Expense (Benefit)	(5)	(46)	320
Income tax expense (benefit)	$ (24)	$ 101	$ 124

Income Taxes - EEGH - Narrative

Income Taxes - EEGH - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Schedule of Income Tax Expense (Benefit) Components [Line Items]
Income tax expense		$ 33	$ 1
Accrued property, income and other taxes	$ 582	537
Eastern Energy Gas Holdings, LLC [Member]
Schedule of Income Tax Expense (Benefit) Components [Line Items]
Income tax expense			$ 1
Income tax benefit associated with effects of changes in tax status of subsidairies	24
Receivables from affiliates	139	362
Accrued property, income and other taxes	$ 29	$ 81

Income Taxes - EEGH - Reconcili

Income Taxes - EEGH - Reconciliation of Effective Income Tax Rate (Details)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Schedule of Effective Income Tax Rate Reconciliation [Line Items]
Federal statutory income tax rate	21.00%	21.00%	21.00%	35.00%
State income tax, net of federal income tax benefit	(3.00%)	5.00%	6.00%
Equity income	0.00%	0.00%	(1.00%)
Other, net	(1.00%)	(1.00%)	(1.00%)
Effective income tax rate	4.00%	(25.00%)	(30.00%)
Eastern Energy Gas Holdings, LLC [Member]
Schedule of Effective Income Tax Rate Reconciliation [Line Items]
Federal statutory income tax rate	21.00%	21.00%	21.00%
State income tax, net of federal income tax benefit	(13.00%)	1.00%	2.00%
Equity income	4.00%	1.00%	2.00%
Effects of ratemaking	(2.00%)	(1.00%)	(1.00%)
Federal legislative changes	0.00%	0.00%	(1.00%)
Change in tax status	(9.00%)	(4.00%)	0.00%
AFUDC-equity	(1.00%)	(1.00%)	0.00%
Absence of noncontrolling interest	(16.00%)	(3.00%)	(5.00%)
Write-off of regulatory assets	3.00%	0.00%	0.00%
Other, net	1.00%	(1.00%)	0.00%
Effective income tax rate	(12.00%)	13.00%	18.00%

Income Taxes - EEGH - Compone_2

Income Taxes - EEGH - Components of Net Deferred Income Tax Liability (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Deferred income tax assets:
Regulatory liabilities	$ 1,420	$ 1,610
Other	777	590
Total deferred income tax assets	3,178	3,081
Valuation allowances	(204)	(143)
Total deferred income tax assets, net	2,974	2,938
Deferred income tax liabilities:
Property-related items	(10,816)	(10,439)
Other	(327)	(384)
Total deferred income tax liabilities	(14,749)	(12,591)
Net deferred income tax liability	(11,775)	(9,653)
Eastern Energy Gas Holdings, LLC [Member]
Deferred income tax assets:
Employee benefits	30	15
Intangibles	148	0
Derivatives and hedges	18	28
Regulatory liabilities	1	4
Deferred revenues	1	4
Other	2	2
Total deferred income tax assets	200	53
Valuation allowances	0	(1)
Total deferred income tax assets, net	200	52
Deferred income tax liabilities:
Property-related items	(52)	(695)
Partnership investments	(19)	(438)
Pension benefits	(1)	(202)
Debt issuance discount	8	0
Other	(1)	(5)
Total deferred income tax liabilities	(81)	(1,340)
Net deferred income tax liability	$ (119)	$ (1,288)

Income Taxes - EEGH - Net Unrec

Income Taxes - EEGH - Net Unrecognized Tax Benefits (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Beginning balance	$ 145	$ 185
Additions based on tax positions related to the current year	5	3
Additions for tax positions of prior years	6	13
Reductions for tax positions of prior years	(1)	(37)
Ending balance	153	145
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	141	139
Eastern Energy Gas Holdings, LLC [Member]
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Beginning balance	2	2
Additions for tax positions of prior years	5	0
Reductions for tax positions of prior years	(7)	0
Ending balance	0	$ 2
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	$ 2

Supplemental Cash Flow Disclo_3

Supplemental Cash Flow Disclosures (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Supplemental Cash Flow Information [Abstract]
Cash and cash equivalents		$ 1,290	$ 1,040
Restricted cash and cash equivalents		140	212
Restricted Cash and Cash Equivalents, Noncurrent		15	16
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents		1,445	1,268	$ 883	$ 1,283
Interest paid, net of amounts capitalized		1,855	1,723	1,713
Income Taxes Paid, Net	[1]	(1,361)	(850)	(780)
Capital Expenditures Incurred but Not yet Paid		801	888	823
Related Party Transaction, Cash Received for Income Taxes, Net		$ 1,504	$ 942	$ 884
[1]	Includes $1,504 million, $942 million and $884 million of income taxes received from Berkshire Hathaway in 2020, 2019 and 2018, respectively.

Supplemental Cash Flow Disclo_4

Supplemental Cash Flow Disclosures - PacifiCorp (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Condensed Cash Flow Statements, Captions [Line Items]
Cash and cash equivalents		$ 1,290	$ 1,040
Interest paid, net of amounts capitalized		1,855	1,723	$ 1,713
Income Taxes Paid, Net	[1]	(1,361)	(850)	(780)
Accrued capital expenditures		801	888	823
Restricted cash and cash equivalents		140	212
Restricted Cash and Cash Equivalents, Noncurrent		15	16
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents		1,445	1,268	883	$ 1,283
PacifiCorp [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Cash and cash equivalents		13	30
Interest paid, net of amounts capitalized		348	340	347
Income Taxes Paid, Net		107	171	144
Accrued capital expenditures		344	293	184
Restricted cash and cash equivalents		4	4
Restricted Cash and Cash Equivalents, Noncurrent		2	2
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents		$ 19	$ 36	$ 92	$ 29
[1]	Includes $1,504 million, $942 million and $884 million of income taxes received from Berkshire Hathaway in 2020, 2019 and 2018, respectively.

Supplemental Cash Flow Disclo_5

Supplemental Cash Flow Disclosures - MEC (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Condensed Income Statements, Captions [Line Items]
Cash and cash equivalents		$ 1,290	$ 1,040
Restricted cash and cash equivalents		140	212
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents		1,445	1,268	$ 883	$ 1,283
Interest paid, net of amounts capitalized		1,855	1,723	1,713
Income taxes received, net	[1]	1,361	850	780
Accrued capital expenditures		801	888	823
MidAmerican Energy Company [Member]
Condensed Income Statements, Captions [Line Items]
Cash and cash equivalents		38	287
Restricted cash and cash equivalents		7	43
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents		45	330	56	$ 282
Interest paid, net of amounts capitalized		286	224	198
Income taxes received, net		709	450	494
Accrued capital expenditures		$ 227	$ 337	$ 371
[1]	Includes $1,504 million, $942 million and $884 million of income taxes received from Berkshire Hathaway in 2020, 2019 and 2018, respectively.

Supplemental Cash Flow Disclo_6

Supplemental Cash Flow Disclosures - MidAmerican Funding (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Condensed Cash Flow Statements, Captions [Line Items]
Cash and cash equivalents		$ 1,290	$ 1,040
Restricted cash and cash equivalents		140	212
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents		1,445	1,268	$ 883	$ 1,283
Interest paid, net of amounts capitalized		1,855	1,723	1,713
Income taxes received, net	[1]	1,361	850	780
Accrued capital expenditures		801	888	823
MidAmerican Funding, LLC and Subsidiaries [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Cash and cash equivalents		39	288
Restricted cash and cash equivalents		7	43
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents		46	331	57	$ 282
Interest paid, net of amounts capitalized		302	245	218
Income taxes received, net		715	456	511
Accrued capital expenditures		$ 227	337	$ 371
Property, Plant and Equipment [Member] | MidAmerican Funding, LLC and Subsidiaries [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Dividend, Noncash, Transfer Of Asset			$ 8
[1]	Includes $1,504 million, $942 million and $884 million of income taxes received from Berkshire Hathaway in 2020, 2019 and 2018, respectively.

Supplemental Cash Flow Disclo_7

Supplemental Cash Flow Disclosures - NPC (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Condensed Cash Flow Statements, Captions [Line Items]
Cash and cash equivalents	$ 1,290	$ 1,040
Restricted cash and cash equivalents	140	212
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	1,445	1,268	$ 883	$ 1,283
Interest paid, net of amounts capitalized	1,855	1,723	1,713
Accrued capital expenditures	801	888	823
Nevada Power Company [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Cash and cash equivalents	25	15
Restricted cash and cash equivalents	11	10
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	36	25	121	$ 66
Interest paid, net of amounts capitalized	115	126	166
Income taxes paid	50	113	117
Accrued capital expenditures	$ 32	$ 49	$ 34

Supplemental Cash Flow Disclo_8

Supplemental Cash Flow Disclosures - SPPC (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Condensed Cash Flow Statements, Captions [Line Items]
Cash and cash equivalents	$ 1,290	$ 1,040
Restricted cash and cash equivalents	140	212
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	1,445	1,268	$ 883	$ 1,283
Interest paid, net of amounts capitalized	1,855	1,723	1,713
Accrued capital expenditures	801	888	823
Sierra Pacific Power Company [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Cash and cash equivalents	19	27
Restricted cash and cash equivalents	7	5
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	26	32	76	$ 8
Interest paid, net of amounts capitalized	42	41	41
Income taxes paid	2	37	19
Accrued capital expenditures	$ 17	$ 18	$ 15

Supplemental Cash Flow Disclo_9

Supplemental Cash Flow Disclosures - EEGH (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Condensed Cash Flow Statements, Captions [Line Items]
Cash and cash equivalents	$ 1,290	$ 1,040
Restricted cash and cash equivalents	140	212
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	1,445	1,268	$ 883	$ 1,283
Interest paid, net of amounts capitalized	1,855	1,723	1,713
Supplemental disclosure of non-cash investing and financing transactions:
Accrued capital expenditures	801	888	823
Eastern Energy Gas Holdings, LLC [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Cash and cash equivalents	35	27
Restricted cash and cash equivalents	13	12
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	48	39	198	$ 57
Interest paid, net of amounts capitalized	317	291	162
Income taxes paid	31	65	79
Supplemental disclosure of non-cash investing and financing transactions:
Accrued capital expenditures	30	25	59
Distribution of Questar Pipeline Group	(699)	0	0
Distribution of 50% interest in Cove Point	(2,765)	0	0
Acquisition of Eastern Energy Gas by BHE	343	0	0
Equity contributions	$ 0	$ 0	$ 23

Related Party Transactions - Pa

Related Party Transactions - PacifiCorp (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Related Party Transaction [Line Items]
Related Party Transaction, Cash Received for Income Taxes, Net	$ 1,504	$ 942	$ 884
PacifiCorp [Member] | BHE [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Due from (to) Related Party	(5)	(1)
Related Party Transaction, Other Revenues from Transactions with Related Party	4	1	2
Related party amounts of transaction	147
Related Party Transaction, Cash Received for Income Taxes, Net	(107)	(171)	(144)
Income Taxes Receivable From (Payable To) Related Parties Current	25	(31)
PacifiCorp [Member] | Affiliated Entity [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Selling, General and Administrative Expenses from Transactions with Related Party	10	10	12
PacifiCorp [Member] | Subsidiary of Common Parent [Member]
Related Party Transaction [Line Items]
Purchases from Related Party	6	7	8
PacifiCorp [Member] | BNSF Railway Company [Member]
Related Party Transaction [Line Items]
Purchases from Related Party	29	35	33
PacifiCorp [Member] | Equity Method Investee [Member]
Related Party Transaction [Line Items]
Purchases from Related Party	$ 145	$ 155	$ 163

Related Party Transactions - ME

Related Party Transactions - MEC (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Related Party Transaction [Line Items]
Related Party Transaction, Cash Received for Income Taxes, Net	$ 1,504	$ 942	$ 884
MidAmerican Energy Company [Member] | Affiliated Entity [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Expense Reimbursement	47	43	51
Due from Affiliate, Current	12	6
Accounts payable to affiliates	13	11
Affiliated notes receivable	146	23
Due to Affiliate, Noncurrent	49	47
MidAmerican Energy Company [Member] | BHE [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Proceeds From Transfer of Asset			15
Related Party Transaction, Expenses from Transactions with Related Party	15	14	11
Income Taxes Receivable From (Payable To) Related Parties Current	(14)	(82)
Related Party Transaction, Cash Received for Income Taxes, Net	709	450	494
MidAmerican Energy Company [Member] | Northern Natural Gas and BNSF Railway Company [Member]
Related Party Transaction [Line Items]
Purchases from Related Party	129	$ 139	$ 127
MidAmerican Energy Company [Member] | BHE Renewables [Member]
Related Party Transaction [Line Items]
Purchases from Related Party	$ 7

Related Party Transactions - Mi

Related Party Transactions - MidAmerican Funding (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Related Party Transaction [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	[1]	$ 11,030	$ 9,412
Related Party Transaction, Cash Received for Income Taxes, Net		1,504	942	$ 884
MidAmerican Funding, LLC and Subsidiaries [Member]
Related Party Transaction [Line Items]
Notes Payable, Related Parties, Current		$ 177	171
Maximum Debt to Capitalization Ratio		0.67
Minumum Interest Coverage Ratio		2.2
MidAmerican Funding, LLC and Subsidiaries [Member] | Affiliated Entity [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Expense Reimbursement		$ 46	41	44
Due from Affiliate, Current		13	7
Accounts payable to affiliates		13	11
Affiliated notes receivable		146	23
Due to Affiliate, Noncurrent		49	47
MidAmerican Funding, LLC and Subsidiaries [Member] | BHE [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Proceeds From Transfer of Asset				15
Related Party Transaction, Expenses from Transactions with Related Party		15	14	11
Income Taxes Receivable From (Payable To) Related Parties Current		(14)	(83)
Related Party Transaction, Cash Received for Income Taxes, Net		715	456	511
MidAmerican Funding, LLC and Subsidiaries [Member] | Northern Natural Gas and BNSF Railway Company [Member]
Related Party Transaction [Line Items]
Purchases from Related Party		129	139	$ 127
MidAmerican Funding, LLC and Subsidiaries [Member] | BHE Renewables [Member]
Related Party Transaction [Line Items]
Purchases from Related Party		7
MidAmerican Funding, LLC and Subsidiaries [Member] | Revolving Credit Arrangement, $300 million [Member] | Line of Credit [Member] | MHC, Inc. [Member] | BHE [Member]
Related Party Transaction [Line Items]
Line of Credit Arrangement Offered to Affiliate, Maximum Amount Available		300
Notes Payable, Related Parties, Current		$ 177	$ 171
Debt, Weighted Average Interest Rate		0.397%	1.944%
MidAmerican Funding, LLC and Subsidiaries [Member] | Revolving Credit Arrangement, $100 million [Member] | Line of Credit [Member] | MHC, Inc. [Member] | BHE [Member]
Related Party Transaction [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		$ 100
Notes Receivable, Related Parties, Current		$ 0	$ 0
Property, Plant and Equipment [Member] | MidAmerican Funding, LLC and Subsidiaries [Member]
Related Party Transaction [Line Items]
Dividend, Noncash, Transfer Of Asset			$ 8
[1]	The table does not include unused credit facilities and letters of credit for investments that are accounted for under the equity method.

Related Party Transactions - NP

Related Party Transactions - NPC (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Related Party Transaction [Line Items]
Related Party Transaction, Cash Received for Income Taxes, Net	$ 1,504	$ 942	$ 884
Nevada Power Company [Member] | BHE [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Selling, General and Administrative Expenses from Transactions with Related Party	2	2	2
Nevada Power Company [Member] | Kern River [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Expenses from Transactions with Related Party	52	52	58
Due to Affiliate	4	4
Nevada Power Company [Member] | Sierra Pacific Power Company [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Selling, General and Administrative Expenses from Transactions with Related Party	15	14	15
Due to Affiliate	0	0
Due from Affiliates	2	3
Related Party Transaction, Expense Reimbursement	26	26	28
Nevada Power Company [Member] | NV Energy, Inc. [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Selling, General and Administrative Expenses from Transactions with Related Party	9	9	7
Due to Affiliate	28	26
Due from Affiliates	0	0
Related Party Transaction, Expense Reimbursement	0	0	1
Income Taxes Receivable From (Payable To) Related Parties Current	0	7
Related Party Transaction, Cash Received for Income Taxes, Net	50	113	117
Nevada Power Company [Member] | Electric Distribution [Member] | PacifiCorp [Member]
Related Party Transaction [Line Items]
Due to Affiliate	0	0
Revenue from Related Parties	3	2	3
Due from Affiliates	0	0
Purchases from Related Party	1	0	0
Nevada Power Company [Member] | Electric Distribution [Member] | Sierra Pacific Power Company [Member]
Related Party Transaction [Line Items]
Due to Affiliate	1	1
Revenue from Related Parties	106	84	91
Due from Affiliates	13	5
Purchases from Related Party	$ 34	$ 25	$ 28

Related Party Transactions - SP

Related Party Transactions - SPPC (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Related Party Transaction [Line Items]
Related Party Transaction, Cash Received for Income Taxes, Net	$ 1,504	$ 942	$ 884
Sierra Pacific Power Company [Member] | BHE [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Selling, General and Administrative Expenses from Transactions with Related Party	1	1	1
Sierra Pacific Power Company [Member] | Nevada Power Company [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Selling, General and Administrative Expenses from Transactions with Related Party	26	26	28
Due from Affiliates	0	0
Due to Affiliate	2
Related Party Transaction, Expense Reimbursement	15	14	15
Sierra Pacific Power Company [Member] | NV Energy, Inc. [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Selling, General and Administrative Expenses from Transactions with Related Party	5	4	4
Due from Affiliates	0	0
Due to Affiliate	17	15
Income Taxes Receivable From (Payable To) Related Parties Current	7	14
Related Party Transaction, Cash Received for Income Taxes, Net	2	37	19
Sierra Pacific Power Company [Member] | Electric Distribution [Member] | Nevada Power Company [Member]
Related Party Transaction [Line Items]
Revenue from Related Parties	34	25	28
Due from Affiliates	1	1
Purchases from Related Party	106	84	$ 91
Due to Affiliate	$ 13	$ 5

Related Party Transactions - EE

Related Party Transactions - EEGH - Narrative (Details) - USD ($)		1 Months Ended	12 Months Ended
		Sep. 30, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Related Party Transaction [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	[1]		$ 11,030,000,000	$ 9,412,000,000
Par value			49,759,000,000
Eastern Energy Gas Holdings, LLC [Member]
Related Party Transaction [Line Items]
Receivables from affiliates			139,000,000	362,000,000
Payments of Distributions to Affiliates			4,539,000,000	636,000,000	$ 296,000,000
Par value			4,455,000,000
Cove Point LNG, LP [Member] | Cove Point Term Loan [Member]
Related Party Transaction [Line Items]
Long-term Line of Credit					3,000,000,000
Affiliated Entity [Member] | Eastern Energy Gas Holdings, LLC [Member]
Related Party Transaction [Line Items]
Revenue from Related Parties			207,000,000	249,000,000	168,000,000
Interest Income, Related Party			3,000,000
Related Party Transaction, Expenses from Transactions with Related Party			129,000,000	226,000,000	169,000,000
Affiliated Entity [Member] | Eastern Energy Gas Holdings, LLC [Member] | Administrative And Technical Services [Member]
Related Party Transaction [Line Items]
Related party amounts of transaction			7,000,000
Affiliated Entity [Member] | Eastern Energy Gas Holdings, LLC [Member] | Transportation And Storage Services [Member]
Related Party Transaction [Line Items]
Related party amounts of transaction			4,000,000
Affiliated Entity [Member] | Eastern Energy Gas Holdings, LLC [Member] | Other Assets Due From Affiliates [Member]
Related Party Transaction [Line Items]
Related party amounts of transaction			7,000,000
Affiliated Entity [Member] | Eastern Energy Gas Holdings, LLC [Member] | Unbilled Revenues [Member] | Trade Accounts Receivable [Member]
Related Party Transaction [Line Items]
Due from Affiliate, Current				22,000,000
Affiliated Entity [Member] | Northeast Midstream [Member] | Northeast Midstream Promissory Note [Member]
Related Party Transaction [Line Items]
Interest Expense, Borrowings				10,000,000
Dominion Energy, Inc. [Member] | Eastern Energy Gas Holdings, LLC [Member] | State and Local Jurisdiction [Member]
Related Party Transaction [Line Items]
Due from Affiliate, Current				10,000,000
Dominion Energy, Inc. [Member] | Affiliated Entity [Member] | Eastern Energy Gas Holdings, LLC [Member]
Related Party Transaction [Line Items]
Receivables from affiliates				209,000,000
Payments of Distributions to Affiliates			4,300,000,000	603,000,000	230,000,000
Dominion Energy, Inc. [Member] | Affiliated Entity [Member] | Eastern Energy Gas Holdings, LLC [Member] | Notes Receivable [Member]
Related Party Transaction [Line Items]
Due from Affiliates				1,800,000,000
Interest Income, Related Party			32,000,000	5,000,000
Dominion Energy, Inc. [Member] | Affiliated Entity [Member] | Eastern Energy Gas Holdings, LLC [Member] | Eastern Energy and DEI Intercompany Revolving Credit Agreement [Member]
Related Party Transaction [Line Items]
Interest Expense, Borrowings			3,000,000	3,000,000	1,000,000
Dominion Energy, Inc. [Member] | Affiliated Entity [Member] | Eastern Energy Gas Holdings, LLC [Member] | Dominion Energy Pension Plan [Member]
Related Party Transaction [Line Items]
Due from Affiliates				326,000,000
Dominion Energy, Inc. [Member] | Affiliated Entity [Member] | Eastern Energy Gas Holdings, LLC [Member] | Dominion Energy Retiree Health and Welfare Plan [Member]
Related Party Transaction [Line Items]
Due from Affiliates				17,000,000
Dominion Energy, Inc. [Member] | Affiliated Entity [Member] | Eastern Energy Gas Holdings, LLC [Member] | Federal [Member]
Related Party Transaction [Line Items]
Due from Affiliate, Current				212,000,000
Dominion Energy, Inc. [Member] | Affiliated Entity [Member] | Eastern Energy Gas Holdings, LLC [Member] | State and Local Jurisdiction [Member]
Related Party Transaction [Line Items]
Due from Affiliate, Current				3,000,000
Dominion Energy, Inc. [Member] | Affiliated Entity [Member] | Cove Point LNG, LP [Member] | Cove Point Term Loan [Member]
Related Party Transaction [Line Items]
Repayments of Long-term Lines of Credit		$ 3,000,000,000
Dominion Energy, Inc. [Member] | Affiliated Entity [Member] | Cove Point LNG, LP [Member] | Cove Point Promissory Note
Related Party Transaction [Line Items]
Interest Income, Related Party				82,000,000	21,000,000
Dominion Energy, Inc. [Member] | Affiliated Entity [Member] | CPMLP Holdings Company, LLC [Member]
Related Party Transaction [Line Items]
Interest Expense, Borrowings				94,000,000	96,000,000
Atlantic Coast Pipeline [Member] | Affiliated Entity [Member] | Eastern Energy Gas Holdings, LLC [Member]
Related Party Transaction [Line Items]
Revenue from Related Parties			83,000,000	164,000,000	260,000,000
Atlantic Coast Pipeline [Member] | Affiliated Entity [Member] | Eastern Gas Transmission and Storage, Inc. [Member]
Related Party Transaction [Line Items]
Revenue from Related Parties			46,000,000	103,000,000	203,000,000
East Ohio and Eastern Gathering and Processing, Inc. [Member] | Affiliated Entity [Member] | Eastern Energy Gas Holdings, LLC [Member]
Related Party Transaction [Line Items]
Interest Income, Related Party				14,000,000	15,000,000
East Ohio [Member] | Affiliated Entity [Member] | Eastern Energy Gas Holdings, LLC [Member] | Notes Receivable [Member]
Related Party Transaction [Line Items]
Due from Affiliates				1,700,000,000
Interest Income, Related Party			33,000,000	72,000,000	64,000,000
Dominion Energy Services, Inc. [Member] | Affiliated Entity [Member] | Eastern Energy Gas Holdings, LLC [Member] | Eastern Energy and DEI Intercompany Revolving Credit Agreement [Member]
Related Party Transaction [Line Items]
Long-term Line of Credit				$ 251,000,000
Debt, Weighted Average Interest Rate				2.02%
Dominion Energy Services, Inc. [Member] | Affiliated Entity [Member] | CPMLP Holdings Company, LLC [Member]
Related Party Transaction [Line Items]
Debt, Weighted Average Interest Rate				3.85%
Interest Expense, Borrowings			3,000,000	$ 3,000,000	1,000,000
Due to Affiliate				$ 9,000,000
Berkshire Hathaway Energy [Member] | Affiliated Entity [Member] | Eastern Energy Gas Holdings, LLC [Member]
Related Party Transaction [Line Items]
Proceeds From Tax Receivable Agreement			76,000,000
Berkshire Hathaway Energy [Member] | Affiliated Entity [Member] | Eastern Energy Gas Holdings, LLC [Member] | Tax Receivable
Related Party Transaction [Line Items]
Due from Affiliates			20,000,000
DEI, BHE, MidAmerican Energy, Northern Natural Gas and Other Related Parties [Member] | Affiliated Entity [Member] | Eastern Energy Gas Holdings, LLC [Member] | Administrative And Technical Services [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Expenses from Transactions with Related Party			$ 4,000,000
BHE GT&S, LLC [Member] | Affiliated Entity [Member] | Eastern Energy Gas Holdings, LLC [Member] | Intercompany Revolving Credit Agreement With BHE GT&S [Member]
Related Party Transaction [Line Items]
Debt, Weighted Average Interest Rate			0.55%
Line of Credit Facility, Maximum Borrowing Capacity			$ 400,000,000
BHE GT&S, LLC [Member] | Affiliated Entity [Member] | Eastern Energy Gas Holdings, LLC [Member] | Intercompany Revolving Credit Agreement With BHE GT&S [Member] | Line of Credit [Member]
Related Party Transaction [Line Items]
Long-term Line of Credit			9,000,000
Eastern Energy Gas Holdings, LLC [Member] | Affiliated Entity [Member] | BHE GT&S, LLC [Member] | BHE GT&S and Eastern Energy Intercompany Revolving Credit Agreement [Member]
Related Party Transaction [Line Items]
Long-term Line of Credit			124,000,000
Par value			200,000,000
MidAmerican Energy Company [Member] | Affiliated Entity [Member] | Eastern Energy Gas Holdings, LLC [Member] | Shared Benefit Plan [Member]
Related Party Transaction [Line Items]
Due to Related Parties, Noncurrent			$ 115,000,000
Cove Point LNG, LP [Member] | Affiliated Entity [Member] | Dominion Energy, Inc. [Member] | Cove Point Term Loan [Member]
Related Party Transaction [Line Items]
Long-term Line of Credit					$ 3,000,000,000
[1]	The table does not include unused credit facilities and letters of credit for investments that are accounted for under the equity method.

Related Party Transactions - _2

Related Party Transactions - EEGH - Significant Transactions (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Related Party Transaction [Line Items]
Capitalized expenditures	$ 6,765	$ 7,364	$ 6,241
Eastern Energy Gas Holdings, LLC [Member]
Related Party Transaction [Line Items]
Capitalized expenditures	374	704	1,109
Eastern Energy Gas Holdings, LLC [Member] | Affiliated Entity [Member]
Related Party Transaction [Line Items]
Revenue from related parties	207	249	168
Purchases of natural gas and transportation and storage services	10	12	0
Services provided by related parties	129	226	169
Capitalized expenditures	14	19	37
Eastern Energy Gas Holdings, LLC [Member] | Affiliated Entity [Member] | Atlantic Coast Pipeline [Member]
Related Party Transaction [Line Items]
Revenue from related parties	$ 83	$ 164	$ 260

Related Party Transactions - _3

Related Party Transactions - EEGH - Affiliated and Related Party Balances (Details) - Eastern Energy Gas Holdings, LLC [Member] $ in Millions	Dec. 31, 2019USD ($)
Related Party Transaction [Line Items]
Other receivables	$ 7
Imbalances from affiliates	8
Imbalances payable to affiliates	1
Other assets	$ 12

Employee Benefit Plans - Net Pe

Employee Benefit Plans - Net Periodic Benefit Cost (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Pension Plan [Member] | MidAmerican Energy Company [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement			$ 1
Pension Plan [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Regulatory Deferrals, Before Tax	$ (2)	$ (1)
Defined Benefit Plan, Service Cost	17	16	21
Defined Benefit Plan, Interest Cost	93	111	105
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(140)	(154)	(164)
Defined Benefit Plan, Accumulated Benefit Obligation, (Increase) Decrease for Settlement and Curtailment	0	0	21
Defined Benefit Plan Net Amortization	32	31	28
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	2	4	11
Pension Plan [Member] | UNITED STATES | MidAmerican Energy Company [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	8	6	9
Defined Benefit Plan, Interest Cost	25	30	28
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(40)	(41)	(44)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement			(1)
Defined Benefit Plan Net Amortization	1	1	2
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	(6)	(4)	(6)
Pension Plan [Member] | UNITED STATES | MidAmerican Energy Company [Member] | MidAmerican Energy Company [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	(13)	(8)	(9)
Pension Plan [Member] | UNITED KINGDOM
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	16	16	19
Defined Benefit Plan, Interest Cost	40	49	56
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(101)	(100)	(101)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement	17	26	44
Defined Benefit Plan Net Amortization	43	46	45
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	15	37	63
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Regulatory Deferrals, Before Tax	(3)	(6)
Defined Benefit Plan, Service Cost	7	8	9
Defined Benefit Plan, Interest Cost	21	27	24
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(34)	(40)	(41)
Defined Benefit Plan, Accumulated Benefit Obligation, (Increase) Decrease for Settlement and Curtailment	0	0	0
Defined Benefit Plan Net Amortization	4	6	13
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	(10)	(11)	(21)
Other Postretirement Benefits Plan [Member] | MidAmerican Energy Company [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	4	5	5
Defined Benefit Plan, Interest Cost	7	10	8
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(14)	(13)	(13)
Defined Benefit Plan Net Amortization	(5)	(3)	(4)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	(8)	(1)	(4)
Other Postretirement Benefits Plan [Member] | MidAmerican Energy Company [Member] | MidAmerican Energy Company [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	$ (5)	$ 1	$ (2)

Employee Benefit Plans - Funded

Employee Benefit Plans - Funded Status (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2020	Dec. 31, 2019
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Defined Benefit Plan, Plan Assets, Amount	$ 744	$ 742	$ 664	$ 744	$ 742
Defined Benefit Plan, Benefit Obligation	673	673	672	758	673
Defined Benefit Plan, Funded (Unfunded) Status of Plan				(14)	69
Other assets				20	76
Other current liabilities				0	0
Liability, Defined Benefit Plan, Noncurrent				(34)	(7)
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position				(14)	69
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	742	664
Defined Benefit Plan, Plan Assets, Contributions by Employer	3	2
Defined Benefit Plan, Contributions by Plan Participants (Deprecated 2017-01-31)	8	9
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss)	40	122
Defined Benefit Plan, Accumulated Benefit Obligation, (Increase) Decrease for Settlement and Curtailment	0	0	0
Defined Benefit Plan, Plan Assets, Payment for Settlement	0	0
Defined Benefit Plan, Benefits Paid (Deprecated 2017-01-31)	(49)	(55)
Ending balance	744	742	664
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Beginning balance	673	672
Defined Benefit Plan, Service Cost	7	8	9
Defined Benefit Plan, Interest Cost	21	27	24
Defined Benefit Plan, Contributions by Plan Participants (Deprecated 2017-01-31)	8	9
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)	61	12
Defined Benefit Plan, Benefit Obligation, Increase (Decrease) for Plan Amendment	0	0
Benefits paid	(49)	(55)
Ending balance	758	673	672
Defined Benefit Plan, Benefit Obligation, Payment for Settlement	0	0
Defined Benefit Plan, Benefit Obligation, Business Combination	37	0
Defined Benefit Plan, Pension Plan with Project Benefit Obligation in Excess of Plan Assets [Abstract]
Defined Benefit Plan, Pension Plan with Projected Benefit Obligation in Excess of Plan Assets, Plan Assets				417	439
Defined Benefit Plan, Pension Plan with Projected Benefit Obligation in Excess of Plan Assets, Projected Benefit Obligation				451	446
Supplemental Employee Retirement Plan [Member]
Defined Benefit Plans, Supplemental Employee Retirement Plans [Abstract]
Life Insurance, Corporate or Bank Owned, Amount				303	252
UNITED STATES | Pension Plan [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Defined Benefit Plan, Plan Assets, Amount	2,656	2,656	2,396	2,824	2,656
Defined Benefit Plan, Benefit Obligation	2,878	2,878	2,718	3,077	2,878
Defined Benefit Plan, Funded (Unfunded) Status of Plan				(253)	(222)
Other assets				43	73
Other current liabilities				(13)	(13)
Liability, Defined Benefit Plan, Noncurrent				(283)	(282)
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position				(253)	(222)
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	2,656	2,396
Defined Benefit Plan, Plan Assets, Contributions by Employer	13	12
Defined Benefit Plan, Contributions by Plan Participants (Deprecated 2017-01-31)	0	0
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss)	373	456
Defined Benefit Plan, Accumulated Benefit Obligation, (Increase) Decrease for Settlement and Curtailment	0	0	21
Defined Benefit Plan, Plan Assets, Payment for Settlement	0	(22)
Defined Benefit Plan, Benefits Paid (Deprecated 2017-01-31)	(218)	(186)
Ending balance	2,824	2,656	2,396
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Beginning balance	2,878	2,718
Defined Benefit Plan, Service Cost	17	16	21
Defined Benefit Plan, Interest Cost	93	111	105
Defined Benefit Plan, Contributions by Plan Participants (Deprecated 2017-01-31)	0	0
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)	226	242
Defined Benefit Plan, Benefit Obligation, Increase (Decrease) for Plan Amendment	0	(1)
Benefits paid	(218)	(186)
Ending balance	3,077	2,878	2,718
Defined Benefit Plan, Accumulated Benefit Obligation				2,999	2,867
Defined Benefit Plan, Benefit Obligation, Payment for Settlement	0	(22)
Defined Benefit Plan, Benefit Obligation, Business Combination	81	0
Defined Benefit Plan, Pension Plan with Project Benefit Obligation in Excess of Plan Assets [Abstract]
Defined Benefit Plan, Pension Plan with Projected Benefit Obligation in Excess of Plan Assets, Plan Assets				1,782	1,939
Defined Benefit Plan, Pension Plan with Projected Benefit Obligation in Excess of Plan Assets, Projected Benefit Obligation				2,069	2,227
Defined Benefit Plan, Plan with Accumulated Benefit Obligation in Excess of Plan Assets, Plan Assets				1,064	1,939
Defined Benefit Plan, Plan with Accumulated Benefit Obligation in Excess of Plan Assets, Accumulated Benefit Obligation				1,341	2,222
UNITED KINGDOM | Pension Plan [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Defined Benefit Plan, Plan Assets, Amount	2,334	1,989	1,989	2,334	2,151
Defined Benefit Plan, Benefit Obligation	2,205	2,019	1,833	2,205	2,019
Defined Benefit Plan, Funded (Unfunded) Status of Plan				129	132
Other assets				129	132
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	2,151	1,989
Defined Benefit Plan, Plan Assets, Contributions by Employer	56	56
Defined Benefit Plan, Contributions by Plan Participants (Deprecated 2017-01-31)	1	1
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss)	181	194
Defined Benefit Plan, Plan Assets, Payment for Settlement	(63)	(99)
Defined Benefit Plan, Benefits Paid (Deprecated 2017-01-31)	(67)	(71)
Foreign Currency Exchange Rate Changes	75	81
Ending balance	2,334	2,151	1,989
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Beginning balance	2,019	1,833
Defined Benefit Plan, Service Cost	16	16	19
Defined Benefit Plan, Interest Cost	40	49	56
Defined Benefit Plan, Contributions by Plan Participants (Deprecated 2017-01-31)	1	1
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)	188	175
Benefits paid	(67)	(71)
Foreign currency exchange rate changes	71	115
Ending balance	2,205	2,019	$ 1,833
Defined Benefit Plan, Accumulated Benefit Obligation				$ 1,963	$ 1,786
Defined Benefit Plan, Benefit Obligation, Payment for Settlement	$ (63)	$ (99)

Employee Benefit Plans - Unreco

Employee Benefit Plans - Unrecognized Amounts (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, Prior Service Cost (Credit), before Tax			$ 6	$ 6
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Before Tax	$ 549	$ 549	618	549
Beginning balance	549
Ending balance	618	549
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Before Tax	(31)	35	28	(31)
Defined Benefit Plan, Net Amortization Recognized in Net Periodic Benefit Cost Before Tax	4	6
Beginning balance	(31)	35
Defined Benefit Plan, Net Unamortized Gain (Loss) Arising During Period, Before Tax	55	(72)
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Arising During Period, Before Tax	59	(66)
Ending balance	28	(31)
Other Postretirement Benefits Plan [Member] | Regulatory Asset, Pension and Other Postretirement Costs [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Before Tax	47	4	47	4
Defined Benefit Plan, Net Amortization Recognized in Net Periodic Benefit Cost Before Tax	7	5
Beginning balance	4	44
Defined Benefit Plan, Net Unamortized Gain (Loss) Arising During Period, Before Tax	36	(45)
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Arising During Period, Before Tax	43	(40)
Ending balance	47	4
Other Postretirement Benefits Plan [Member] | Regulatory Liability, Pension and Other Postretirement Costs [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Before Tax	(23)	(32)	(23)	(32)
Defined Benefit Plan, Net Amortization Recognized in Net Periodic Benefit Cost Before Tax	(3)	1
Beginning balance	(32)	(10)
Defined Benefit Plan, Net Unamortized Gain (Loss) Arising During Period, Before Tax	12	(23)
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Arising During Period, Before Tax	9	(22)
Ending balance	(23)	(32)
Other Postretirement Benefits Plan [Member] | Accumulated Other Comprehensive Income (Loss) [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Before Tax	4	(3)	4	(3)
Beginning balance	(3)	1
Defined Benefit Plan, Net Unamortized Gain (Loss) Arising During Period, Before Tax	7	(4)
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Arising During Period, Before Tax	7	(4)
Ending balance	4	(3)
Pension Plan [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Before Tax	613	652	613	652
Defined Benefit Plan, Net Amortization Recognized in Net Periodic Benefit Cost Before Tax	(32)	(31)
Beginning balance	652	746
Defined Benefit Plan, Net Unamortized Gain (Loss) Arising During Period, Before Tax	(7)	(61)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit), Net		(2)
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Arising During Period, Before Tax	(39)	(94)
Ending balance	613	652
Pension Plan [Member] | UNITED STATES | Regulatory Asset, Pension and Other Postretirement Costs [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Before Tax	600	661	600	661
Defined Benefit Plan, Net Amortization Recognized in Net Periodic Benefit Cost Before Tax	(31)	(31)
Beginning balance	661	730
Defined Benefit Plan, Net Unamortized Gain (Loss) Arising During Period, Before Tax	(30)	(38)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit), Net		0
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Arising During Period, Before Tax	(61)	(69)
Ending balance	600	661
Pension Plan [Member] | UNITED STATES | Regulatory Liability, Pension and Other Postretirement Costs [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Before Tax	(20)	(33)	(20)	(33)
Defined Benefit Plan, Net Amortization Recognized in Net Periodic Benefit Cost Before Tax	0	0
Beginning balance	(33)	0
Defined Benefit Plan, Net Unamortized Gain (Loss) Arising During Period, Before Tax	13	(33)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit), Net		0
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Arising During Period, Before Tax	13	(33)
Ending balance	(20)	(33)
Pension Plan [Member] | UNITED STATES | Accumulated Other Comprehensive Income (Loss) [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Before Tax	33	24	33	24
Defined Benefit Plan, Net Amortization Recognized in Net Periodic Benefit Cost Before Tax	(1)	0
Beginning balance	24	16
Defined Benefit Plan, Net Unamortized Gain (Loss) Arising During Period, Before Tax	10	10
Defined Benefit Plan, Amortization of Prior Service Cost (Credit), Net		(2)
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Arising During Period, Before Tax	9	8
Ending balance	33	24
Pension Plan [Member] | UNITED KINGDOM
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Net Gains (Losses), Before Tax			612	543
Pension Plan [Member] | UNITED KINGDOM | Accumulated Other Comprehensive Income (Loss) [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Before Tax	618	480	$ 618	$ 549
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, before Tax	108	81
Other Comprehensive Income (Loss), Defined Benefit Plan, Settlement and Curtailment Gain (Loss), before Tax	(17)	(26)
Defined Benefit Plan, Net Amortization Recognized in Net Periodic Benefit Cost Before Tax	(43)	(46)
Foreign currency exchange rate changes	21	60
Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment and Tax	69	69
Beginning balance	549	480
Ending balance	$ 618	$ 549

Employee Benefit Plans - Plan A

Employee Benefit Plans - Plan Assumptions (Details)	12 Months Ended
	Dec. 31, 2020		Dec. 31, 2019		Dec. 31, 2018
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Health Care Cost Trend Rate Assumed, Next Fiscal Year	6.30%		6.50%
Defined Benefit Plan, Ultimate Health Care Cost Trend Rate	5.00%		5.00%
Pension Plan [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	2.60%		3.32%		4.25%
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Rate of Compensation Increase	2.75%		2.75%		2.75%
Interest Crediting Rates for Cash Balance Plan, First Year	2.44%		3.22%		3.38%
Interest Crediting Rates for Cash Balance Plan, Third Year	2.25%		2.94%		3.54%
Interest Crediting Rates for Cash Balance Plan, Fourth Year	2.65%		3.02%		3.56%
Interest Crediting Rates for Cash Balance Plan, Fifth Year			3.02%		3.56%
Interest Crediting Rates for Cash Balance Plan, Sixth Year					3.56%
Interest Crediting Rates for Cash Balance Plan, Second Year	2.25%		2.94%		3.54%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	3.32%		4.25%		3.60%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets	5.94%		6.48%		6.36%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase	2.75%		2.75%		2.75%
Pension Plan [Member] | UNITED KINGDOM
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	1.40%		2.10%		2.90%
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Rate of Compensation Increase	3.05%		3.30%		3.55%
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Expected Rate Of Future Price Inflation	2.55%		2.80%		3.05%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	2.10%		2.90%		2.60%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets	5.00%		5.10%		4.90%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase	3.30%		3.55%		3.45%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Rate of Future Price Inflation	2.80%		3.05%		2.95%
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	2.59%		3.24%		4.21%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	3.24%		4.21%		3.57%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets	5.42%		6.39%		6.44%
PacifiCorp [Member] | Pension Plan [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	2.50%		3.25%		4.25%
Interest Crediting Rates for Cash Balance Plan, Fourth Year	2.40%		2.70%
Interest crediting rates for cash balance plan	0.82%	[1]	2.27%	[2]	3.40%	[3]
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	3.25%		4.25%		3.60%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets	6.50%		7.00%		7.00%
PacifiCorp [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	2.50%		3.20%		4.25%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	3.20%		4.25%		3.60%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets	4.92%		6.86%		6.86%
Nonunion pension plan participant [Member] | PacifiCorp [Member] | Pension Plan [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Interest Crediting Rates for Cash Balance Plan, Third Year	2.00%		2.10%
Interest Crediting Rates for Cash Balance Plan, Fourth Year					3.15%
Interest Crediting Rates for Cash Balance Plan, Second Year	0.82%		2.27%		3.40%
Union pension plan participant [Member] | PacifiCorp [Member] | Pension Plan [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Interest Crediting Rates for Cash Balance Plan, Fourth Year					3.25%
Interest Crediting Rates for Cash Balance Plan, Second Year	1.42%		2.16%
[1]	2020 Cash Balance Interest Crediting Rate assumption is 0.82% for 2021-2022 and 2.00% for 2023 and all future years for nonunion participants and 1.42% for 2021-2022 and 2.40% for 2023+ for union participants.
[2]	2019 Cash Balance Interest Crediting Rate assumption was 2.27% for 2020-2021 and 2.10% for 2022 and all future years for nonunion participants and 2.16% for 2020-2021 and 2.70% for 2022+ for union participants.
[3]	2018 Cash Balance Interest Crediting Rate assumption was 3.40% for 2019 and all future years for nonunion participants and 3.15% for 2019-2020 and 3.25% for 2021+ for union participants.

Employee Benefit Plans - Contri

Employee Benefit Plans - Contributions and Benefit Payments (Details) £ in Millions, $ in Millions		12 Months Ended
		Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)	Dec. 31, 2020GBP (£)
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Expected Future Benefit Payment, Next Twelve Months		$ 53
Defined Benefit Plan, Expected Future Benefit Payment, Year Two		54
Defined Benefit Plan, Expected Future Benefit Payment, Year Three		54
Defined Benefit Plan, Expected Future Benefit Payment, Year Four		54
Defined Benefit Plan, Expected Future Benefit Payment, Year Five		52
Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter		238
Defined Benefit Plan, Plan Assets, Contributions by Employer		3	$ 2
Other Postretirement Benefits Plan [Member] | PacifiCorp [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year		1
Defined Benefit Plan, Expected Future Benefit Payment, Next Twelve Months		24
Defined Benefit Plan, Expected Future Benefit Payment, Year Two		23
Defined Benefit Plan, Expected Future Benefit Payment, Year Three		22
Defined Benefit Plan, Expected Future Benefit Payment, Year Four		22
Defined Benefit Plan, Expected Future Benefit Payment, Year Five		20
Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter		90
Defined Benefit Plan, Plan Assets, Contributions by Employer	[1]	0	1
UNITED STATES | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year		13
Defined Benefit Plan, Expected Future Benefit Payment, Next Twelve Months		236
Defined Benefit Plan, Expected Future Benefit Payment, Year Two		219
Defined Benefit Plan, Expected Future Benefit Payment, Year Three		220
Defined Benefit Plan, Expected Future Benefit Payment, Year Four		211
Defined Benefit Plan, Expected Future Benefit Payment, Year Five		206
Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter		926
Defined Benefit Plan, Plan Assets, Contributions by Employer		13	12
UNITED STATES | Pension Plan [Member] | PacifiCorp [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year		4
Defined Benefit Plan, Expected Future Benefit Payment, Next Twelve Months		115
Defined Benefit Plan, Expected Future Benefit Payment, Year Two		99
Defined Benefit Plan, Expected Future Benefit Payment, Year Three		94
Defined Benefit Plan, Expected Future Benefit Payment, Year Four		87
Defined Benefit Plan, Expected Future Benefit Payment, Year Five		82
Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter		341
Defined Benefit Plan, Plan Assets, Contributions by Employer	[1]	5	4
UNITED STATES | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year		14
UNITED KINGDOM | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year | £				£ 50
Defined Benefit Plan, Expected Future Benefit Payment, Next Twelve Months		74
Defined Benefit Plan, Expected Future Benefit Payment, Year Two		75
Defined Benefit Plan, Expected Future Benefit Payment, Year Three		77
Defined Benefit Plan, Expected Future Benefit Payment, Year Four		79
Defined Benefit Plan, Expected Future Benefit Payment, Year Five		81
Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter		431
Defined Benefit Plan, Plan Assets, Contributions by Employer		$ 56	$ 56
[1]	Amounts represent employer contributions to the SERP

Employee Benefit Plans - Asset

Employee Benefit Plans - Asset Allocations (Details)		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019
Other Postretirement Benefits Plan [Member] | Equity Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Percentage of Investment Funds Comprised of Equity Securitites		40.00%	58.00%
Percentage of Investment Funds Comprised of Debt Securities		60.00%	42.00%
UNITED STATES | Pension Plan [Member] | Equity Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Percentage of Investment Funds Comprised of Equity Securitites		69.00%	62.00%
Percentage of Investment Funds Comprised of Debt Securities		31.00%	38.00%
UNITED KINGDOM | Pension Plan [Member] | Equity Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Percentage of Investment Funds Comprised of Equity Securitites		40.00%	38.00%
Percentage of Investment Funds Comprised of Debt Securities		60.00%	62.00%
Minimum [Member] | UNITED KINGDOM | Pension Plan [Member] | Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description		60
Minimum [Member] | UNITED KINGDOM | Pension Plan [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description		10
Minimum [Member] | UNITED KINGDOM | Pension Plan [Member] | Real Estate Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description		15
Maximum [Member] | UNITED KINGDOM | Pension Plan [Member] | Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description		70
Maximum [Member] | UNITED KINGDOM | Pension Plan [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description		20
Maximum [Member] | UNITED KINGDOM | Pension Plan [Member] | Real Estate Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description		25
PacifiCorp [Member] | Other Postretirement Benefits Plan [Member] | Equity Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Percentage of Investment Funds Comprised of Equity Securitites		38.00%	56.00%
Percentage of Investment Funds Comprised of Debt Securities		62.00%	44.00%
PacifiCorp [Member] | UNITED STATES | Pension Plan [Member] | Equity Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Percentage of Investment Funds Comprised of Equity Securitites		78.00%	55.00%
Percentage of Investment Funds Comprised of Debt Securities		22.00%	45.00%
PacifiCorp [Member] | Minimum [Member] | Other Postretirement Benefits Plan [Member] | Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description	[1],[2]	75
PacifiCorp [Member] | Minimum [Member] | Other Postretirement Benefits Plan [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description	[1],[2]	16
PacifiCorp [Member] | Minimum [Member] | Other Postretirement Benefits Plan [Member] | Limited Partnership Interests [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description	[2]	1
PacifiCorp [Member] | Minimum [Member] | UNITED STATES | Pension Plan [Member] | Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description	[1],[2]	25
PacifiCorp [Member] | Minimum [Member] | UNITED STATES | Pension Plan [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description	[1],[2]	53
PacifiCorp [Member] | Minimum [Member] | UNITED STATES | Pension Plan [Member] | Limited Partnership Interests [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description	[2]	7
PacifiCorp [Member] | Maximum [Member] | Other Postretirement Benefits Plan [Member] | Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description	[1],[2]	83
PacifiCorp [Member] | Maximum [Member] | Other Postretirement Benefits Plan [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description	[1],[2]	24
PacifiCorp [Member] | Maximum [Member] | Other Postretirement Benefits Plan [Member] | Limited Partnership Interests [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description	[2]	3
PacifiCorp [Member] | Maximum [Member] | UNITED STATES | Pension Plan [Member] | Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description	[1],[2]	35
PacifiCorp [Member] | Maximum [Member] | UNITED STATES | Pension Plan [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description	[1],[2]	68
PacifiCorp [Member] | Maximum [Member] | UNITED STATES | Pension Plan [Member] | Limited Partnership Interests [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description	[2]	12
MidAmerican Energy Company [Member] | Minimum [Member] | Other Postretirement Benefits Plan [Member] | Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description		60
MidAmerican Energy Company [Member] | Minimum [Member] | Other Postretirement Benefits Plan [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description		30
MidAmerican Energy Company [Member] | Minimum [Member] | Other Postretirement Benefits Plan [Member] | Other Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description		0
MidAmerican Energy Company [Member] | Minimum [Member] | UNITED STATES | Pension Plan [Member] | Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description		50
MidAmerican Energy Company [Member] | Minimum [Member] | UNITED STATES | Pension Plan [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description		20
MidAmerican Energy Company [Member] | Minimum [Member] | UNITED STATES | Pension Plan [Member] | Real Estate Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description		0
MidAmerican Energy Company [Member] | Minimum [Member] | UNITED STATES | Pension Plan [Member] | Other Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description		0
MidAmerican Energy Company [Member] | Maximum [Member] | Other Postretirement Benefits Plan [Member] | Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description		70
MidAmerican Energy Company [Member] | Maximum [Member] | Other Postretirement Benefits Plan [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description		40
MidAmerican Energy Company [Member] | Maximum [Member] | Other Postretirement Benefits Plan [Member] | Real Estate Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description		—
MidAmerican Energy Company [Member] | Maximum [Member] | Other Postretirement Benefits Plan [Member] | Other Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description		5
MidAmerican Energy Company [Member] | Maximum [Member] | UNITED STATES | Pension Plan [Member] | Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description		80
MidAmerican Energy Company [Member] | Maximum [Member] | UNITED STATES | Pension Plan [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description		50
MidAmerican Energy Company [Member] | Maximum [Member] | UNITED STATES | Pension Plan [Member] | Real Estate Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description		5
MidAmerican Energy Company [Member] | Maximum [Member] | UNITED STATES | Pension Plan [Member] | Other Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description		5
NV Energy, Inc. [Member] | Minimum [Member] | Other Postretirement Benefits Plan [Member] | Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Target Plan Asset Allocations Range Minimum		60.00%
NV Energy, Inc. [Member] | Minimum [Member] | Other Postretirement Benefits Plan [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Target Plan Asset Allocations Range Minimum	[3]	30.00%
NV Energy, Inc. [Member] | Minimum [Member] | UNITED STATES | Pension Plan [Member] | Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description		60
NV Energy, Inc. [Member] | Minimum [Member] | UNITED STATES | Pension Plan [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description		25
NV Energy, Inc. [Member] | Maximum [Member] | Other Postretirement Benefits Plan [Member] | Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Target Plan Asset Allocations Range Minimum		70.00%
NV Energy, Inc. [Member] | Maximum [Member] | Other Postretirement Benefits Plan [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Target Plan Asset Allocations Range Minimum		40.00%
NV Energy, Inc. [Member] | Maximum [Member] | UNITED STATES | Pension Plan [Member] | Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description		75
NV Energy, Inc. [Member] | Maximum [Member] | UNITED STATES | Pension Plan [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description		40
[1]	For purposes of target allocation percentages and consistent with the plans' investment policy, investment funds are allocated based on the underlying investments in debt and equity securities.
[2]	PacifiCorp Retirement Plan is invested includes a separate account that is used to fund benefits for the other postretirement benefit plan. In addition to this separate account, the assets for the other postretirement benefit plan are held in Voluntary Employees' Beneficiary Association ("VEBA") trusts, each of which has its own investment allocation strategies. Target allocations for the other postretirement benefit plan include the separate account of the Retirement Plan trust and the VEBA trusts.
[3]	For purposes of target allocation percentages and consistent with the plans' investment policy, investment funds are allocated based on the underlying investments in debt and equity securities.

Employee Benefit Plans - Fair V

Employee Benefit Plans - Fair Value Measurements (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2020		Dec. 31, 2019		Dec. 31, 2018	Dec. 31, 2017
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss)		$ 40		$ 122
Defined Benefit Plan, Plan Assets, Payment for Settlement		0		0
Defined Benefit Plan, Plan Assets, Amount		744		742		$ 664
Other Postretirement Benefits Plan [Member] | Limited Partnership Interests [Member] | Fair Value Measured at Net Asset Value Per Share [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		4		5
Other Postretirement Benefits Plan [Member] | Defined Benefit Plan, Assets Before Investment Funds, Partnership Interests And Real Estate Funds | Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		573		568
Other Postretirement Benefits Plan [Member] | Defined Benefit Plan, Assets Before Investment Funds, Partnership Interests And Real Estate Funds | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		340		433
Other Postretirement Benefits Plan [Member] | Defined Benefit Plan, Assets Before Investment Funds, Partnership Interests And Real Estate Funds | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		233		135
Other Postretirement Benefits Plan [Member] | Defined Benefit Plan, Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		22		18
Other Postretirement Benefits Plan [Member] | Defined Benefit Plan, Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		20		17	[1]
Other Postretirement Benefits Plan [Member] | Defined Benefit Plan, Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		2		1	[1]
Other Postretirement Benefits Plan [Member] | US Treasury Securities [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		15		23
Other Postretirement Benefits Plan [Member] | US Treasury Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		15		23
Other Postretirement Benefits Plan [Member] | US Treasury Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0		0
Other Postretirement Benefits Plan [Member] | Corporate Debt Securities [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		102		44
Other Postretirement Benefits Plan [Member] | Corporate Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0		0
Other Postretirement Benefits Plan [Member] | Corporate Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		102		44
Other Postretirement Benefits Plan [Member] | Municipal Bonds [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		82		57
Other Postretirement Benefits Plan [Member] | Municipal Bonds [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0		0
Other Postretirement Benefits Plan [Member] | Municipal Bonds [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		82		57
Other Postretirement Benefits Plan [Member] | Agency, Asset and Mortgage-Backed Securities | Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		47		33
Other Postretirement Benefits Plan [Member] | Agency, Asset and Mortgage-Backed Securities | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0		0
Other Postretirement Benefits Plan [Member] | Agency, Asset and Mortgage-Backed Securities | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		47		33
Other Postretirement Benefits Plan [Member] | Domestic Equity Securities [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		6		151
Other Postretirement Benefits Plan [Member] | Domestic Equity Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		6		151	[1]
Other Postretirement Benefits Plan [Member] | Domestic Equity Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		$ 0		0	[1]
Other Postretirement Benefits Plan [Member] | Foreign Equity Securities [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount				6
Other Postretirement Benefits Plan [Member] | Foreign Equity Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	[1]			6
Other Postretirement Benefits Plan [Member] | Foreign Equity Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount				$ 0
Other Postretirement Benefits Plan [Member] | Equity Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Percentage of Investment Funds Comprised of Equity Securitites		40.00%		58.00%
Percentage of Investment Funds Comprised of Debt Securities		60.00%		42.00%
Percentage of Investment Funds Invested in United States Securities		79.00%		75.00%
Percentage of Investment Funds Invested in International Securities		21.00%		25.00%
Other Postretirement Benefits Plan [Member] | Equity Funds [Member] | Fair Value Measured at Net Asset Value Per Share [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		$ 167		$ 169	[2]
Other Postretirement Benefits Plan [Member] | Defined Benefit Plan, Equity Securities | Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		299		236
Other Postretirement Benefits Plan [Member] | Defined Benefit Plan, Equity Securities | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		299		236
Other Postretirement Benefits Plan [Member] | Defined Benefit Plan, Equity Securities | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0		0
UNITED STATES | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss)		373		456
Defined Benefit Plan, Plan Assets, Payment for Settlement		0		(22)
Defined Benefit Plan, Plan Assets, Amount		2,824		2,656		2,396
UNITED STATES | Pension Plan [Member] | Limited Partnership Interests [Member] | Fair Value Measured at Net Asset Value Per Share [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		88		93	[3]
UNITED STATES | Pension Plan [Member] | Real Estate Funds [Member] | Fair Value Measured at Net Asset Value Per Share [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		43		42
UNITED STATES | Pension Plan [Member] | Defined Benefit Plan, Assets Before Investment Funds, Partnership Interests And Real Estate Funds | Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		1,172		1,606
UNITED STATES | Pension Plan [Member] | Defined Benefit Plan, Assets Before Investment Funds, Partnership Interests And Real Estate Funds | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		276		1,045
UNITED STATES | Pension Plan [Member] | Defined Benefit Plan, Assets Before Investment Funds, Partnership Interests And Real Estate Funds | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		896		561	[4]
UNITED STATES | Pension Plan [Member] | Defined Benefit Plan, Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		79		63
UNITED STATES | Pension Plan [Member] | Defined Benefit Plan, Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0		27
UNITED STATES | Pension Plan [Member] | Defined Benefit Plan, Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		79		36
UNITED STATES | Pension Plan [Member] | US Treasury Securities [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		52		210
UNITED STATES | Pension Plan [Member] | US Treasury Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		52		210
UNITED STATES | Pension Plan [Member] | US Treasury Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0		0	[4]
UNITED STATES | Pension Plan [Member] | Corporate Debt Securities [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		748		376
UNITED STATES | Pension Plan [Member] | Corporate Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0		0	[4]
UNITED STATES | Pension Plan [Member] | Corporate Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		748		376	[4]
UNITED STATES | Pension Plan [Member] | Municipal Bonds [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		69		28
UNITED STATES | Pension Plan [Member] | Municipal Bonds [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0		0	[4]
UNITED STATES | Pension Plan [Member] | Municipal Bonds [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		69		28
UNITED STATES | Pension Plan [Member] | Domestic Equity Securities [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		224		548
UNITED STATES | Pension Plan [Member] | Domestic Equity Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		224		547	[4]
UNITED STATES | Pension Plan [Member] | Domestic Equity Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		$ 0		1	[4]
UNITED STATES | Pension Plan [Member] | Debt Security, Government, Non-US [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount				5
UNITED STATES | Pension Plan [Member] | Debt Security, Government, Non-US [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount				0
UNITED STATES | Pension Plan [Member] | Debt Security, Government, Non-US [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	[4]			5
UNITED STATES | Pension Plan [Member] | US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount				115
UNITED STATES | Pension Plan [Member] | US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount				0
UNITED STATES | Pension Plan [Member] | US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount				115
UNITED STATES | Pension Plan [Member] | Foreign Equity Securities [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount				136
UNITED STATES | Pension Plan [Member] | Foreign Equity Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount				136
UNITED STATES | Pension Plan [Member] | Foreign Equity Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	[4]			$ 0
UNITED STATES | Pension Plan [Member] | Equity Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Percentage of Investment Funds Comprised of Equity Securitites		69.00%		62.00%
Percentage of Investment Funds Comprised of Debt Securities		31.00%		38.00%
Percentage of Investment Funds Invested in United States Securities		79.00%		66.00%
Percentage of Investment Funds Invested in International Securities		21.00%		34.00%
UNITED STATES | Pension Plan [Member] | Equity Funds [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	[5]			$ 125
UNITED STATES | Pension Plan [Member] | Equity Funds [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	[4],[5]			125
UNITED STATES | Pension Plan [Member] | Equity Funds [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount				0
UNITED STATES | Pension Plan [Member] | Equity Funds [Member] | Fair Value Measured at Net Asset Value Per Share [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		$ 1,521		915	[5]
UNITED KINGDOM | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss)		181		194
Defined Benefit Plan, Plan Assets, Payment for Settlement		(63)		(99)
Defined Benefit Plan, Plan Assets, Amount		2,334		2,151		1,989
Defined Benefit Plan, Plan Assets, Foreign Currency Translation Gain (Loss)		75		81
UNITED KINGDOM | Pension Plan [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		2,226		2,048
UNITED KINGDOM | Pension Plan [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	[6]	1,107		963
UNITED KINGDOM | Pension Plan [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		882		842
UNITED KINGDOM | Pension Plan [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	[6]	237		243
UNITED KINGDOM | Pension Plan [Member] | United Kingdom Government Obligations [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		1,102		960
UNITED KINGDOM | Pension Plan [Member] | United Kingdom Government Obligations [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		1,102		960
UNITED KINGDOM | Pension Plan [Member] | United Kingdom Government Obligations [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	[6]	0
UNITED KINGDOM | Pension Plan [Member] | United Kingdom Government Obligations [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0		0
UNITED KINGDOM | Pension Plan [Member] | Real Estate Funds [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		237		243
UNITED KINGDOM | Pension Plan [Member] | Real Estate Funds [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0		0
UNITED KINGDOM | Pension Plan [Member] | Real Estate Funds [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0		0
UNITED KINGDOM | Pension Plan [Member] | Real Estate Funds [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		237	[6]	243	[6]	239	$ 230
Defined Benefit Plan, Plan Assets Level 3 Reconciliation, Increase (Decrease) for Actual Return (Loss) on Plan Assets Still Held		(13)		(5)		23
Defined Benefit Plan, Plan Assets, Foreign Currency Translation Gain (Loss)		7		9		$ (14)
UNITED KINGDOM | Pension Plan [Member] | Cash Equivalents [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		54		27
UNITED KINGDOM | Pension Plan [Member] | Cash Equivalents [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		5		3	[6]
UNITED KINGDOM | Pension Plan [Member] | Cash Equivalents [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	[6]	49		24
UNITED KINGDOM | Pension Plan [Member] | Cash Equivalents [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	[6]	$ 0		$ 0
UNITED KINGDOM | Pension Plan [Member] | Equity Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Percentage of Investment Funds Comprised of Equity Securitites		40.00%		38.00%
Percentage of Investment Funds Comprised of Debt Securities		60.00%		62.00%
UNITED KINGDOM | Pension Plan [Member] | Equity Funds [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	[7]	$ 833		$ 818
UNITED KINGDOM | Pension Plan [Member] | Equity Funds [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	[6],[7]	0		0
UNITED KINGDOM | Pension Plan [Member] | Equity Funds [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		833		818
UNITED KINGDOM | Pension Plan [Member] | Equity Funds [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0		0	[6],[7]
UNITED KINGDOM | Pension Plan [Member] | Equity Funds [Member] | Fair Value Measured at Net Asset Value Per Share [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	[7]	$ 108		$ 103
[1]	Refer to Note 15 for additional discussion regarding the three levels of the fair value hierarchy.
[2]	Investment funds are comprised of mutual funds and collective trust funds. These funds consist of equity and debt securities of approximately 40% and 60%, respectively, for 2020 and 58% and 42%, respectively, for 2019. Additionally, these funds are invested in United States and international securities of approximately 79% and 21%, respectively, for 2020 and 75% and 25%, respectively, for 2019.
[3]	Limited partnership interests include several funds that invest primarily in real estate, buyout, growth equity and venture capital.
[4]	Refer to Note 15 for additional discussion regarding the three levels of the fair value hierarchy.
[5]	Investment funds are comprised of mutual funds and collective trust funds. These funds consist of equity and debt securities of approximately 69% and 31%, respectively, for 2020 and 62% and 38%, respectively, for 2019. Additionally, these funds are invested in United States and international securities of approximately 79% and 21%, respectively, for 2020 and 66% and 34%, respectively, for 2019.
[6]	Refer to Note 15 for additional discussion regarding the three levels of the fair value hierarchy.
[7]	Investment funds are comprised of mutual funds and collective trust funds. These funds consist of equity and debt securities of approximately 40% and 60%, respectively, for 2020 and 38% and 62%, respectively, for 2019.

Employee Benefit Plans - Level

Employee Benefit Plans - Level 3 Rollforward (Details) - UNITED KINGDOM - Pension Plan [Member] - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2020		Dec. 31, 2019		Dec. 31, 2018
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance		$ 2,151		$ 1,989
Foreign Currency Exchange Rate Changes		75		81
Ending balance		2,334		2,151		$ 1,989
Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	[1]	243
Ending balance	[1]	237		243
Real Estate Funds [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance		243	[1]	239		230
Defined Benefit Plan, Plan Assets Level 3 Reconciliation, Increase (Decrease) for Actual Return (Loss) on Plan Assets Still Held		(13)		(5)		23
Foreign Currency Exchange Rate Changes		7		9		(14)
Ending balance		$ 237	[1]	$ 243	[1]	$ 239
[1]	Refer to Note 15 for additional discussion regarding the three levels of the fair value hierarchy.

Employee Benefit Plans - Define

Employee Benefit Plans - Defined Contribution Plans (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Contribution Plan, Cost	$ 127	$ 115	$ 112

Employee Benefit Plans - Pacifi

Employee Benefit Plans - PacifiCorp - Net Periodic Benefit Cost (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Accumulated Benefit Obligation, (Increase) Decrease for Settlement and Curtailment	$ 0	$ 0	$ 0
Defined Benefit Plan, Plan Assets, Payment for Settlement	0	0
Defined Benefit Plan, Service Cost	7	8	9
Defined Benefit Plan, Interest Cost	21	27	24
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(34)	(40)	(41)
Defined Benefit Plan Net Amortization	4	6	13
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	(10)	(11)	(21)
Other Postretirement Benefits Plan [Member] | PacifiCorp [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Accumulated Benefit Obligation, (Increase) Decrease for Settlement and Curtailment	0	0	0
Defined Benefit Plan, Service Cost	2	2	2
Defined Benefit Plan, Interest Cost	9	12	11
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(14)	(21)	(21)
Defined Benefit Plan Net Amortization	3	0	(6)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	0	(7)	(14)
UNITED STATES | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Accumulated Benefit Obligation, (Increase) Decrease for Settlement and Curtailment	0	0	21
Defined Benefit Plan, Plan Assets, Payment for Settlement	0	22
Defined Benefit Plan, Service Cost	17	16	21
Defined Benefit Plan, Interest Cost	93	111	105
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(140)	(154)	(164)
Defined Benefit Plan Net Amortization	32	31	28
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	2	4	11
UNITED STATES | Pension Plan [Member] | PacifiCorp [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Accumulated Benefit Obligation, (Increase) Decrease for Settlement and Curtailment	0	0	22
Defined Benefit Plan, Service Cost	0	0	0
Defined Benefit Plan, Interest Cost	36	44	43
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(56)	(67)	(72)
Defined Benefit Plan Net Amortization	18	11	13
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	$ (2)	$ (12)	$ 6

Employee Benefit Plans - Paci_2

Employee Benefit Plans - PacifiCorp - Funded Status (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2020	Dec. 31, 2019
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance		$ 742	$ 664
Defined Benefit Plan, Plan Assets, Contributions by Employer		3	2
Defined Benefit Plan, Contributions by Plan Participants (Deprecated 2017-01-31)		8	9
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss)		40	122
Defined Benefit Plan, Plan Assets, Payment for Settlement		0	0
Defined Benefit Plan, Benefits Paid (Deprecated 2017-01-31)		(49)	(55)
Ending balance		744	742	$ 664
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Beginning balance		673	672
Defined Benefit Plan, Service Cost		7	8	9
Defined Benefit Plan, Interest Cost		21	27	24
Defined Benefit Plan, Contributions by Plan Participants (Deprecated 2017-01-31)		8	9
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)		61	12
Benefits Paid		(49)	(55)
Defined Benefit Plan, Benefit Obligation		673	672	672	$ 758	$ 673
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Defined Benefit Plan, Funded (Unfunded) Status of Plan					(14)	69
Assets for Plan Benefits, Defined Benefit Plan					20	76
Other current liabilities					0	0
Liability, Defined Benefit Plan, Noncurrent					(34)	(7)
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position					(14)	69
Supplemental Employee Retirement Plan [Member]
Defined Benefit Plans, Supplemental Employee Retirement Plans [Abstract]
Life Insurance, Corporate or Bank Owned, Amount					303	252
PacifiCorp [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance		334	297
Defined Benefit Plan, Plan Assets, Contributions by Employer	[1]	0	1
Defined Benefit Plan, Contributions by Plan Participants (Deprecated 2017-01-31)		4	5
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss)		15	55
Defined Benefit Plan, Benefits Paid (Deprecated 2017-01-31)		(26)	(24)
Ending balance		327	334	297
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Beginning balance		304	298
Defined Benefit Plan, Service Cost		2	2	2
Defined Benefit Plan, Interest Cost		9	12	11
Defined Benefit Plan, Contributions by Plan Participants (Deprecated 2017-01-31)		4	5
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)		14	11
Benefits Paid		(26)	(24)
Defined Benefit Plan, Benefit Obligation		304	298	298	307	304
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Defined Benefit Plan, Funded (Unfunded) Status of Plan					20	30
Assets for Plan Benefits, Defined Benefit Plan					20	30
Other current liabilities					0	0
Liability, Defined Benefit Plan, Noncurrent					0	0
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position					20	30
PacifiCorp [Member] | Supplemental Employee Retirement Plan [Member]
Defined Benefit Plans, Supplemental Employee Retirement Plans [Abstract]
Life Insurance, Corporate or Bank Owned, Amount					61	57
UNITED STATES | Pension Plan [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance		2,656	2,396
Defined Benefit Plan, Plan Assets, Contributions by Employer		13	12
Defined Benefit Plan, Contributions by Plan Participants (Deprecated 2017-01-31)		0	0
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss)		373	456
Defined Benefit Plan, Plan Assets, Payment for Settlement		0	(22)
Defined Benefit Plan, Benefits Paid (Deprecated 2017-01-31)		(218)	(186)
Ending balance		2,824	2,656	2,396
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Beginning balance		2,878	2,718
Defined Benefit Plan, Service Cost		17	16	21
Defined Benefit Plan, Interest Cost		93	111	105
Defined Benefit Plan, Contributions by Plan Participants (Deprecated 2017-01-31)		0	0
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)		226	242
Benefits Paid		(218)	(186)
Defined Benefit Plan, Benefit Obligation		2,878	2,718	2,718	3,077	2,878
Defined Benefit Plan, Accumulated Benefit Obligation					2,999	2,867
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Defined Benefit Plan, Funded (Unfunded) Status of Plan					(253)	(222)
Assets for Plan Benefits, Defined Benefit Plan					43	73
Other current liabilities					(13)	(13)
Liability, Defined Benefit Plan, Noncurrent					(283)	(282)
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position					(253)	(222)
UNITED STATES | PacifiCorp [Member] | Pension Plan [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance		1,036	942
Defined Benefit Plan, Plan Assets, Contributions by Employer	[1]	5	4
Defined Benefit Plan, Contributions by Plan Participants (Deprecated 2017-01-31)		0	0
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss)		124	181
Defined Benefit Plan, Benefits Paid (Deprecated 2017-01-31)		(101)	(91)
Ending balance		1,064	1,036	942
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Beginning balance		1,167	1,105
Defined Benefit Plan, Service Cost		0	0	0
Defined Benefit Plan, Interest Cost		36	44	43
Defined Benefit Plan, Contributions by Plan Participants (Deprecated 2017-01-31)		0	0
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)		100	109
Benefits Paid		(101)	(91)
Defined Benefit Plan, Benefit Obligation		$ 1,167	$ 1,105	$ 1,105	1,202	1,167
Defined Benefit Plan, Accumulated Benefit Obligation					1,202	1,167
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Defined Benefit Plan, Funded (Unfunded) Status of Plan					(138)	(131)
Assets for Plan Benefits, Defined Benefit Plan					8	7
Other current liabilities					(4)	(4)
Liability, Defined Benefit Plan, Noncurrent					(142)	(134)
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position					$ (138)	$ (131)
[1]	Amounts represent employer contributions to the SERP

Employee Benefit Plans - Paci_3

Employee Benefit Plans - PacifiCorp - Unrecognized Amounts (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Before Tax	$ 618	$ 549
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Net Gains (Losses), Before Tax	34	(23)
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Net Prior Service Cost (Credit), Before Tax	(9)	(14)
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Regulatory Deferrals, Before Tax	3	6
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Before Tax	28	(31)	$ 35
Defined Benefit Plan, Reconciliation of Amounts Not Yet Recognized As Components of Net Periodic Benefit Cost [Roll Forward]
Defined Benefit Plan, Net Unamortized Gain (Loss) Arising During Period, Before Tax	55	(72)
Defined Benefit Plan, Net Amortization Recognized in Net Periodic Benefit Cost Before Tax	4	6
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Arising During Period, Before Tax	59	(66)
Other Postretirement Benefits Plan [Member] | Regulatory Asset, Pension and Other Postretirement Costs [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Before Tax	47	4	44
Defined Benefit Plan, Reconciliation of Amounts Not Yet Recognized As Components of Net Periodic Benefit Cost [Roll Forward]
Defined Benefit Plan, Net Unamortized Gain (Loss) Arising During Period, Before Tax	36	(45)
Defined Benefit Plan, Net Amortization Recognized in Net Periodic Benefit Cost Before Tax	7	5
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Arising During Period, Before Tax	43	(40)
Other Postretirement Benefits Plan [Member] | Accumulated Other Comprehensive Income (Loss) [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Before Tax	4	(3)	1
Defined Benefit Plan, Reconciliation of Amounts Not Yet Recognized As Components of Net Periodic Benefit Cost [Roll Forward]
Defined Benefit Plan, Net Unamortized Gain (Loss) Arising During Period, Before Tax	7	(4)
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Arising During Period, Before Tax	7	(4)
Other Postretirement Benefits Plan [Member] | PacifiCorp [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Net Gains (Losses), Before Tax	(13)	(26)
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Regulatory Deferrals, Before Tax	3	6
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Before Tax	(10)	(20)
Other Postretirement Benefits Plan [Member] | PacifiCorp [Member] | Regulatory Asset, Pension and Other Postretirement Costs [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Before Tax	(10)	(20)	5
Defined Benefit Plan, Reconciliation of Amounts Not Yet Recognized As Components of Net Periodic Benefit Cost [Roll Forward]
Defined Benefit Plan, Net Unamortized Gain (Loss) Arising During Period, Before Tax	13	(25)
Defined Benefit Plan, Net Amortization Recognized in Net Periodic Benefit Cost Before Tax	(3)	0
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Arising During Period, Before Tax	10	(25)
Pension Plan [Member] | PacifiCorp [Member]
Defined Benefit Plan, Reconciliation of Amounts Not Yet Recognized As Components of Net Periodic Benefit Cost [Roll Forward]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement			(22)
UNITED STATES | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Net Gains (Losses), Before Tax	612	653
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Net Prior Service Cost (Credit), Before Tax	(1)	(2)
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Regulatory Deferrals, Before Tax	2	1
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Before Tax	613	652	746
Defined Benefit Plan, Reconciliation of Amounts Not Yet Recognized As Components of Net Periodic Benefit Cost [Roll Forward]
Defined Benefit Plan, Net Unamortized Gain (Loss) Arising During Period, Before Tax	(7)	(61)
Defined Benefit Plan, Net Amortization Recognized in Net Periodic Benefit Cost Before Tax	(32)	(31)
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Arising During Period, Before Tax	(39)	(94)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit), Net		2
UNITED STATES | Pension Plan [Member] | Regulatory Asset, Pension and Other Postretirement Costs [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Before Tax	600	661	730
Defined Benefit Plan, Reconciliation of Amounts Not Yet Recognized As Components of Net Periodic Benefit Cost [Roll Forward]
Defined Benefit Plan, Net Unamortized Gain (Loss) Arising During Period, Before Tax	(30)	(38)
Defined Benefit Plan, Net Amortization Recognized in Net Periodic Benefit Cost Before Tax	(31)	(31)
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Arising During Period, Before Tax	(61)	(69)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit), Net		0
UNITED STATES | Pension Plan [Member] | Accumulated Other Comprehensive Income (Loss) [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Before Tax	33	24	16
Defined Benefit Plan, Reconciliation of Amounts Not Yet Recognized As Components of Net Periodic Benefit Cost [Roll Forward]
Defined Benefit Plan, Net Unamortized Gain (Loss) Arising During Period, Before Tax	10	10
Defined Benefit Plan, Net Amortization Recognized in Net Periodic Benefit Cost Before Tax	(1)	0
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Arising During Period, Before Tax	9	8
Defined Benefit Plan, Amortization of Prior Service Cost (Credit), Net		2
UNITED STATES | Pension Plan [Member] | PacifiCorp [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Net Gains (Losses), Before Tax	455	442
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Regulatory Deferrals, Before Tax	2	1
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Before Tax	457	443	460
Defined Benefit Plan, Reconciliation of Amounts Not Yet Recognized As Components of Net Periodic Benefit Cost [Roll Forward]
Defined Benefit Plan, Net Unamortized Gain (Loss) Arising During Period, Before Tax	32	(6)
Defined Benefit Plan, Net Amortization Recognized in Net Periodic Benefit Cost Before Tax	(18)	(11)
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Arising During Period, Before Tax	14	(17)
UNITED STATES | Pension Plan [Member] | PacifiCorp [Member] | Regulatory Asset, Pension and Other Postretirement Costs [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Before Tax	432	422	443
Defined Benefit Plan, Reconciliation of Amounts Not Yet Recognized As Components of Net Periodic Benefit Cost [Roll Forward]
Defined Benefit Plan, Net Unamortized Gain (Loss) Arising During Period, Before Tax	27	(11)
Defined Benefit Plan, Net Amortization Recognized in Net Periodic Benefit Cost Before Tax	(17)	(10)
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Arising During Period, Before Tax	10	(21)
UNITED STATES | Pension Plan [Member] | PacifiCorp [Member] | Accumulated Other Comprehensive Income (Loss) [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Before Tax	25	21	$ 17
Defined Benefit Plan, Reconciliation of Amounts Not Yet Recognized As Components of Net Periodic Benefit Cost [Roll Forward]
Defined Benefit Plan, Net Unamortized Gain (Loss) Arising During Period, Before Tax	5	5
Defined Benefit Plan, Net Amortization Recognized in Net Periodic Benefit Cost Before Tax	(1)	(1)
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Arising During Period, Before Tax	$ 4	$ 4

Employee Benefit Plans - Paci_4

Employee Benefit Plans - PacifiCorp - Plan Assumptions (Details)	12 Months Ended
	Dec. 31, 2020		Dec. 31, 2019		Dec. 31, 2018
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	2.59%		3.24%		4.21%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	3.24%		4.21%		3.57%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets	5.42%		6.39%		6.44%
Other Postretirement Benefits Plan [Member] | PacifiCorp [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	2.50%		3.20%		4.25%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	3.20%		4.25%		3.60%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets	4.92%		6.86%		6.86%
UNITED STATES | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Interest Crediting Rates for Cash Balance Plan, Second Year	2.25%		2.94%		3.54%
Interest Crediting Rates for Cash Balance Plan, Fourth Year	2.65%		3.02%		3.56%
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	2.60%		3.32%		4.25%
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Rate of Compensation Increase	2.75%		2.75%		2.75%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	3.32%		4.25%		3.60%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets	5.94%		6.48%		6.36%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase	2.75%		2.75%		2.75%
Interest Crediting Rates for Cash Balance Plan, Third Year	2.25%		2.94%		3.54%
UNITED STATES | Pension Plan [Member] | PacifiCorp [Member]
Defined Benefit Plan Disclosure [Line Items]
Interest Crediting Rates for Cash Balance Plan, Fourth Year	2.40%		2.70%
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	2.50%		3.25%		4.25%
Interest crediting rates for cash balance plan	0.82%	[1]	2.27%	[2]	3.40%	[3]
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	3.25%		4.25%		3.60%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets	6.50%		7.00%		7.00%
UNITED STATES | Pension Plan [Member] | PacifiCorp [Member] | Union pension plan participant [Member]
Defined Benefit Plan Disclosure [Line Items]
Interest Crediting Rates for Cash Balance Plan, Second Year	1.42%		2.16%
Interest Crediting Rates for Cash Balance Plan, Fourth Year					3.25%
UNITED STATES | Pension Plan [Member] | PacifiCorp [Member] | Nonunion pension plan participant [Member]
Defined Benefit Plan Disclosure [Line Items]
Interest Crediting Rates for Cash Balance Plan, Second Year	0.82%		2.27%		3.40%
Interest Crediting Rates for Cash Balance Plan, Fourth Year					3.15%
Interest Crediting Rates for Cash Balance Plan, Third Year	2.00%		2.10%
[1]	2020 Cash Balance Interest Crediting Rate assumption is 0.82% for 2021-2022 and 2.00% for 2023 and all future years for nonunion participants and 1.42% for 2021-2022 and 2.40% for 2023+ for union participants.
[2]	2019 Cash Balance Interest Crediting Rate assumption was 2.27% for 2020-2021 and 2.10% for 2022 and all future years for nonunion participants and 2.16% for 2020-2021 and 2.70% for 2022+ for union participants.
[3]	2018 Cash Balance Interest Crediting Rate assumption was 3.40% for 2019 and all future years for nonunion participants and 3.15% for 2019-2020 and 3.25% for 2021+ for union participants.

Employee Benefit Plans - Paci_5

Employee Benefit Plans - PacifiCorp - Contributions and Benefit Payments (Details) $ in Millions	Dec. 31, 2020USD ($)
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Expected Future Benefit Payment, Next Twelve Months	$ 53
Defined Benefit Plan, Expected Future Benefit Payment, Year Two	54
Defined Benefit Plan, Expected Future Benefit Payment, Year Three	54
Defined Benefit Plan, Expected Future Benefit Payment, Year Four	54
Defined Benefit Plan, Expected Future Benefit Payment, Year Five	52
Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter	238
Other Postretirement Benefits Plan [Member] | PacifiCorp [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year	1
Defined Benefit Plan, Expected Future Benefit Payment, Next Twelve Months	24
Defined Benefit Plan, Expected Future Benefit Payment, Year Two	23
Defined Benefit Plan, Expected Future Benefit Payment, Year Three	22
Defined Benefit Plan, Expected Future Benefit Payment, Year Four	22
Defined Benefit Plan, Expected Future Benefit Payment, Year Five	20
Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter	90
UNITED STATES | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year	13
Defined Benefit Plan, Expected Future Benefit Payment, Next Twelve Months	236
Defined Benefit Plan, Expected Future Benefit Payment, Year Two	219
Defined Benefit Plan, Expected Future Benefit Payment, Year Three	220
Defined Benefit Plan, Expected Future Benefit Payment, Year Four	211
Defined Benefit Plan, Expected Future Benefit Payment, Year Five	206
Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter	926
UNITED STATES | Pension Plan [Member] | PacifiCorp [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year	4
Defined Benefit Plan, Expected Future Benefit Payment, Next Twelve Months	115
Defined Benefit Plan, Expected Future Benefit Payment, Year Two	99
Defined Benefit Plan, Expected Future Benefit Payment, Year Three	94
Defined Benefit Plan, Expected Future Benefit Payment, Year Four	87
Defined Benefit Plan, Expected Future Benefit Payment, Year Five	82
Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter	341
UNITED STATES | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year	$ 14

Employee Benefit Plans - Paci_6

Employee Benefit Plans - PacifiCorp - Asset Allocations (Details) - PacifiCorp [Member]	12 Months Ended
	Dec. 31, 2020	[2]
Minimum [Member] | Other Postretirement Benefits Plan [Member] | Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description	75	[1]
Minimum [Member] | Other Postretirement Benefits Plan [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description	16	[1]
Minimum [Member] | Other Postretirement Benefits Plan [Member] | Limited Partnership Interests [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description	1
Maximum [Member] | Other Postretirement Benefits Plan [Member] | Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description	83	[1]
Maximum [Member] | Other Postretirement Benefits Plan [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description	24	[1]
Maximum [Member] | Other Postretirement Benefits Plan [Member] | Limited Partnership Interests [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description	3
UNITED STATES | Minimum [Member] | Pension Plan [Member] | Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description	25	[1]
UNITED STATES | Minimum [Member] | Pension Plan [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description	53	[1]
UNITED STATES | Minimum [Member] | Pension Plan [Member] | Limited Partnership Interests [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description	7
UNITED STATES | Maximum [Member] | Pension Plan [Member] | Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description	35	[1]
UNITED STATES | Maximum [Member] | Pension Plan [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description	68	[1]
UNITED STATES | Maximum [Member] | Pension Plan [Member] | Limited Partnership Interests [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description	12
[1]	For purposes of target allocation percentages and consistent with the plans' investment policy, investment funds are allocated based on the underlying investments in debt and equity securities.
[2]	PacifiCorp Retirement Plan is invested includes a separate account that is used to fund benefits for the other postretirement benefit plan. In addition to this separate account, the assets for the other postretirement benefit plan are held in Voluntary Employees' Beneficiary Association ("VEBA") trusts, each of which has its own investment allocation strategies. Target allocations for the other postretirement benefit plan include the separate account of the Retirement Plan trust and the VEBA trusts.

Employee Benefit Plans - Paci_7

Employee Benefit Plans - PacifiCorp - Fair Value Measurements (Details) - USD ($) $ in Millions		Dec. 31, 2020	Dec. 31, 2019		Dec. 31, 2018
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		$ 744	$ 742		$ 664
Defined Benefit Plan, Benefit Obligation		758	673		672
Other Postretirement Benefits Plan [Member] | Limited Partnership Interests [Member] | Fair Value Measured at Net Asset Value Per Share [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		4	5
Other Postretirement Benefits Plan [Member] | Defined Benefit Plan, Assets Before Investment Funds, Partnership Interests And Real Estate Funds | Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		573	568
Other Postretirement Benefits Plan [Member] | Defined Benefit Plan, Assets Before Investment Funds, Partnership Interests And Real Estate Funds | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		340	433
Other Postretirement Benefits Plan [Member] | Defined Benefit Plan, Assets Before Investment Funds, Partnership Interests And Real Estate Funds | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		233	135
Other Postretirement Benefits Plan [Member] | US Treasury Securities [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		15	23
Other Postretirement Benefits Plan [Member] | US Treasury Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		15	23
Other Postretirement Benefits Plan [Member] | US Treasury Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Other Postretirement Benefits Plan [Member] | Domestic Equity Securities [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		6	151
Other Postretirement Benefits Plan [Member] | Domestic Equity Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		6	151	[1]
Other Postretirement Benefits Plan [Member] | Domestic Equity Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0	[1]
Other Postretirement Benefits Plan [Member] | Foreign Equity Securities [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount			6
Other Postretirement Benefits Plan [Member] | Foreign Equity Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	[1]		6
Other Postretirement Benefits Plan [Member] | Foreign Equity Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount			0
Other Postretirement Benefits Plan [Member] | Corporate Debt Securities [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		102	44
Other Postretirement Benefits Plan [Member] | Corporate Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Other Postretirement Benefits Plan [Member] | Corporate Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		102	44
Other Postretirement Benefits Plan [Member] | Municipal Bonds [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		82	57
Other Postretirement Benefits Plan [Member] | Municipal Bonds [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Other Postretirement Benefits Plan [Member] | Municipal Bonds [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		$ 82	$ 57
Other Postretirement Benefits Plan [Member] | Equity Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Percentage of Investment Funds Comprised of Equity Securitites		40.00%	58.00%
Percentage of Investment Funds Comprised of Debt Securities		60.00%	42.00%
Percentage of Investment Funds Invested in United States Securities		79.00%	75.00%
Percentage of Investment Funds Invested in International Securities		21.00%	25.00%
Other Postretirement Benefits Plan [Member] | Equity Funds [Member] | Fair Value Measured at Net Asset Value Per Share [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		$ 167	$ 169	[2]
Other Postretirement Benefits Plan [Member] | PacifiCorp [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		327	334		297
Defined Benefit Plan, Benefit Obligation		307	304		298
Other Postretirement Benefits Plan [Member] | PacifiCorp [Member] | Limited Partnership Interests [Member] | Fair Value Measured at Net Asset Value Per Share [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	[3]	4	5
Other Postretirement Benefits Plan [Member] | PacifiCorp [Member] | Defined Benefit Plan, Assets Before Investment Funds, Partnership Interests And Real Estate Funds | Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		170	193
Other Postretirement Benefits Plan [Member] | PacifiCorp [Member] | Defined Benefit Plan, Assets Before Investment Funds, Partnership Interests And Real Estate Funds | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		23	142
Other Postretirement Benefits Plan [Member] | PacifiCorp [Member] | Defined Benefit Plan, Assets Before Investment Funds, Partnership Interests And Real Estate Funds | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		147	51
Other Postretirement Benefits Plan [Member] | PacifiCorp [Member] | Defined Benefit Plan, Assets Before Investment Funds, Partnership Interests And Real Estate Funds | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Other Postretirement Benefits Plan [Member] | PacifiCorp [Member] | Cash Equivalents [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		9	9
Other Postretirement Benefits Plan [Member] | PacifiCorp [Member] | Cash Equivalents [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		8	8
Other Postretirement Benefits Plan [Member] | PacifiCorp [Member] | Cash Equivalents [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		1	1
Other Postretirement Benefits Plan [Member] | PacifiCorp [Member] | Cash Equivalents [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Other Postretirement Benefits Plan [Member] | PacifiCorp [Member] | US Treasury Securities [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		11	12
Other Postretirement Benefits Plan [Member] | PacifiCorp [Member] | US Treasury Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		11	12
Other Postretirement Benefits Plan [Member] | PacifiCorp [Member] | US Treasury Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Other Postretirement Benefits Plan [Member] | PacifiCorp [Member] | US Treasury Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Other Postretirement Benefits Plan [Member] | PacifiCorp [Member] | Domestic Equity Securities [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		4	74
Other Postretirement Benefits Plan [Member] | PacifiCorp [Member] | Domestic Equity Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		4	74
Other Postretirement Benefits Plan [Member] | PacifiCorp [Member] | Domestic Equity Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Other Postretirement Benefits Plan [Member] | PacifiCorp [Member] | Domestic Equity Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Other Postretirement Benefits Plan [Member] | PacifiCorp [Member] | Foreign Equity Securities [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount			4
Other Postretirement Benefits Plan [Member] | PacifiCorp [Member] | Foreign Equity Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount			4
Other Postretirement Benefits Plan [Member] | PacifiCorp [Member] | Foreign Equity Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount			0
Other Postretirement Benefits Plan [Member] | PacifiCorp [Member] | Foreign Equity Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount			0
Other Postretirement Benefits Plan [Member] | PacifiCorp [Member] | Corporate Debt Securities [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		86	26
Other Postretirement Benefits Plan [Member] | PacifiCorp [Member] | Corporate Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Other Postretirement Benefits Plan [Member] | PacifiCorp [Member] | Corporate Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		86	26
Other Postretirement Benefits Plan [Member] | PacifiCorp [Member] | Corporate Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Other Postretirement Benefits Plan [Member] | PacifiCorp [Member] | US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		44	22
Other Postretirement Benefits Plan [Member] | PacifiCorp [Member] | US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Other Postretirement Benefits Plan [Member] | PacifiCorp [Member] | US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		44	22
Other Postretirement Benefits Plan [Member] | PacifiCorp [Member] | US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Other Postretirement Benefits Plan [Member] | PacifiCorp [Member] | Municipal Bonds [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		16	2
Other Postretirement Benefits Plan [Member] | PacifiCorp [Member] | Municipal Bonds [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Other Postretirement Benefits Plan [Member] | PacifiCorp [Member] | Municipal Bonds [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		16	2
Other Postretirement Benefits Plan [Member] | PacifiCorp [Member] | Municipal Bonds [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		$ 0	$ 0
Other Postretirement Benefits Plan [Member] | PacifiCorp [Member] | Equity Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Percentage of Investment Funds Comprised of Equity Securitites		38.00%	56.00%
Percentage of Investment Funds Comprised of Debt Securities		62.00%	44.00%
Percentage of Investment Funds Invested in United States Securities		93.00%	79.00%
Percentage of Investment Funds Invested in International Securities		7.00%	21.00%
Other Postretirement Benefits Plan [Member] | PacifiCorp [Member] | Equity Funds [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount			$ 44
Other Postretirement Benefits Plan [Member] | PacifiCorp [Member] | Equity Funds [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount			44
Other Postretirement Benefits Plan [Member] | PacifiCorp [Member] | Equity Funds [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount			0
Other Postretirement Benefits Plan [Member] | PacifiCorp [Member] | Equity Funds [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount			0
Other Postretirement Benefits Plan [Member] | PacifiCorp [Member] | Equity Funds [Member] | Fair Value Measured at Net Asset Value Per Share [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	[4]	$ 153	136
UNITED STATES | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		2,824	2,656		2,396
Defined Benefit Plan, Benefit Obligation		3,077	2,878		2,718
Defined Benefit Plan, Accumulated Benefit Obligation		2,999	2,867
UNITED STATES | Pension Plan [Member] | Limited Partnership Interests [Member] | Fair Value Measured at Net Asset Value Per Share [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		88	93	[5]
UNITED STATES | Pension Plan [Member] | Defined Benefit Plan, Assets Before Investment Funds, Partnership Interests And Real Estate Funds | Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		1,172	1,606
UNITED STATES | Pension Plan [Member] | Defined Benefit Plan, Assets Before Investment Funds, Partnership Interests And Real Estate Funds | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		276	1,045
UNITED STATES | Pension Plan [Member] | Defined Benefit Plan, Assets Before Investment Funds, Partnership Interests And Real Estate Funds | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		896	561	[6]
UNITED STATES | Pension Plan [Member] | US Treasury Securities [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		52	210
UNITED STATES | Pension Plan [Member] | US Treasury Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		52	210
UNITED STATES | Pension Plan [Member] | US Treasury Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0	[6]
UNITED STATES | Pension Plan [Member] | Domestic Equity Securities [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		224	548
UNITED STATES | Pension Plan [Member] | Domestic Equity Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		224	547	[6]
UNITED STATES | Pension Plan [Member] | Domestic Equity Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	1	[6]
UNITED STATES | Pension Plan [Member] | Foreign Equity Securities [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount			136
UNITED STATES | Pension Plan [Member] | Foreign Equity Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount			136
UNITED STATES | Pension Plan [Member] | Foreign Equity Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	[6]		0
UNITED STATES | Pension Plan [Member] | Corporate Debt Securities [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		748	376
UNITED STATES | Pension Plan [Member] | Corporate Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0	[6]
UNITED STATES | Pension Plan [Member] | Corporate Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		748	376	[6]
UNITED STATES | Pension Plan [Member] | US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount			115
UNITED STATES | Pension Plan [Member] | US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount			0
UNITED STATES | Pension Plan [Member] | US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount			115
UNITED STATES | Pension Plan [Member] | Municipal Bonds [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		69	28
UNITED STATES | Pension Plan [Member] | Municipal Bonds [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0	[6]
UNITED STATES | Pension Plan [Member] | Municipal Bonds [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		$ 69	$ 28
UNITED STATES | Pension Plan [Member] | Equity Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Percentage of Investment Funds Comprised of Equity Securitites		69.00%	62.00%
Percentage of Investment Funds Comprised of Debt Securities		31.00%	38.00%
Percentage of Investment Funds Invested in United States Securities		79.00%	66.00%
Percentage of Investment Funds Invested in International Securities		21.00%	34.00%
UNITED STATES | Pension Plan [Member] | Equity Funds [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	[7]		$ 125
UNITED STATES | Pension Plan [Member] | Equity Funds [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	[6],[7]		125
UNITED STATES | Pension Plan [Member] | Equity Funds [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount			0
UNITED STATES | Pension Plan [Member] | Equity Funds [Member] | Fair Value Measured at Net Asset Value Per Share [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		$ 1,521	915	[7]
UNITED STATES | Pension Plan [Member] | PacifiCorp [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		1,064	1,036		942
Defined Benefit Plan, Benefit Obligation		1,202	1,167		$ 1,105
Defined Benefit Plan, Accumulated Benefit Obligation		1,202	1,167
UNITED STATES | Pension Plan [Member] | PacifiCorp [Member] | Limited Partnership Interests [Member] | Fair Value Measured at Net Asset Value Per Share [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	[3]	88	93
UNITED STATES | Pension Plan [Member] | PacifiCorp [Member] | Defined Benefit Plan, Assets Before Investment Funds, Partnership Interests And Real Estate Funds | Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		389	616
UNITED STATES | Pension Plan [Member] | PacifiCorp [Member] | Defined Benefit Plan, Assets Before Investment Funds, Partnership Interests And Real Estate Funds | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		105	446
UNITED STATES | Pension Plan [Member] | PacifiCorp [Member] | Defined Benefit Plan, Assets Before Investment Funds, Partnership Interests And Real Estate Funds | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		284	170
UNITED STATES | Pension Plan [Member] | PacifiCorp [Member] | Defined Benefit Plan, Assets Before Investment Funds, Partnership Interests And Real Estate Funds | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
UNITED STATES | Pension Plan [Member] | PacifiCorp [Member] | Cash Equivalents [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		32	24
UNITED STATES | Pension Plan [Member] | PacifiCorp [Member] | Cash Equivalents [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
UNITED STATES | Pension Plan [Member] | PacifiCorp [Member] | Cash Equivalents [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		32	24
UNITED STATES | Pension Plan [Member] | PacifiCorp [Member] | Cash Equivalents [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
UNITED STATES | Pension Plan [Member] | PacifiCorp [Member] | US Treasury Securities [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		14	21
UNITED STATES | Pension Plan [Member] | PacifiCorp [Member] | US Treasury Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		14	21
UNITED STATES | Pension Plan [Member] | PacifiCorp [Member] | US Treasury Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
UNITED STATES | Pension Plan [Member] | PacifiCorp [Member] | US Treasury Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
UNITED STATES | Pension Plan [Member] | PacifiCorp [Member] | Domestic Equity Securities [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		91	355
UNITED STATES | Pension Plan [Member] | PacifiCorp [Member] | Domestic Equity Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		91	355
UNITED STATES | Pension Plan [Member] | PacifiCorp [Member] | Domestic Equity Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
UNITED STATES | Pension Plan [Member] | PacifiCorp [Member] | Domestic Equity Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
UNITED STATES | Pension Plan [Member] | PacifiCorp [Member] | Foreign Equity Securities [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount			15
UNITED STATES | Pension Plan [Member] | PacifiCorp [Member] | Foreign Equity Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount			15
UNITED STATES | Pension Plan [Member] | PacifiCorp [Member] | Foreign Equity Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount			0
UNITED STATES | Pension Plan [Member] | PacifiCorp [Member] | Foreign Equity Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount			0
UNITED STATES | Pension Plan [Member] | PacifiCorp [Member] | Corporate Debt Securities [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		231	94
UNITED STATES | Pension Plan [Member] | PacifiCorp [Member] | Corporate Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
UNITED STATES | Pension Plan [Member] | PacifiCorp [Member] | Corporate Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		231	94
UNITED STATES | Pension Plan [Member] | PacifiCorp [Member] | Corporate Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
UNITED STATES | Pension Plan [Member] | PacifiCorp [Member] | US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount			42
UNITED STATES | Pension Plan [Member] | PacifiCorp [Member] | US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount			0
UNITED STATES | Pension Plan [Member] | PacifiCorp [Member] | US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount			42
UNITED STATES | Pension Plan [Member] | PacifiCorp [Member] | US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount			0
UNITED STATES | Pension Plan [Member] | PacifiCorp [Member] | Municipal Bonds [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		21	10
UNITED STATES | Pension Plan [Member] | PacifiCorp [Member] | Municipal Bonds [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
UNITED STATES | Pension Plan [Member] | PacifiCorp [Member] | Municipal Bonds [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		21	10
UNITED STATES | Pension Plan [Member] | PacifiCorp [Member] | Municipal Bonds [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		$ 0	$ 0
UNITED STATES | Pension Plan [Member] | PacifiCorp [Member] | Equity Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Percentage of Investment Funds Comprised of Equity Securitites		78.00%	55.00%
Percentage of Investment Funds Comprised of Debt Securities		22.00%	45.00%
Percentage of Investment Funds Invested in United States Securities		74.00%	51.00%
Percentage of Investment Funds Invested in International Securities		26.00%	49.00%
UNITED STATES | Pension Plan [Member] | PacifiCorp [Member] | Equity Funds [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount			$ 55
UNITED STATES | Pension Plan [Member] | PacifiCorp [Member] | Equity Funds [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount			55
UNITED STATES | Pension Plan [Member] | PacifiCorp [Member] | Equity Funds [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount			0
UNITED STATES | Pension Plan [Member] | PacifiCorp [Member] | Equity Funds [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount			0
UNITED STATES | Pension Plan [Member] | PacifiCorp [Member] | Equity Funds [Member] | Fair Value Measured at Net Asset Value Per Share [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	[4]	$ 587	$ 327
[1]	Refer to Note 15 for additional discussion regarding the three levels of the fair value hierarchy.
[2]	Investment funds are comprised of mutual funds and collective trust funds. These funds consist of equity and debt securities of approximately 40% and 60%, respectively, for 2020 and 58% and 42%, respectively, for 2019. Additionally, these funds are invested in United States and international securities of approximately 79% and 21%, respectively, for 2020 and 75% and 25%, respectively, for 2019.
[3]	Limited partnership interests include several funds that invest primarily in real estate.
[4]	Investment funds are substantially comprised of mutual funds and collective trust funds. These funds consist of equity and debt securities of approximately 78% and 22%, respectively, for 2020 and 55% and 45%, respectively, for 2019, and are invested in United States and international securities of approximately 74% and 26%, respectively, for 2020 and 51% and 49%, respectively, for 2019.
[5]	Limited partnership interests include several funds that invest primarily in real estate, buyout, growth equity and venture capital.
[6]	Refer to Note 15 for additional discussion regarding the three levels of the fair value hierarchy.
[7]	Investment funds are comprised of mutual funds and collective trust funds. These funds consist of equity and debt securities of approximately 69% and 31%, respectively, for 2020 and 62% and 38%, respectively, for 2019. Additionally, these funds are invested in United States and international securities of approximately 79% and 21%, respectively, for 2020 and 66% and 34%, respectively, for 2019.

Employee Benefit Plans - Paci_8

Employee Benefit Plans - PacifiCorp - Multiemployer and Joint Trust Pension Plans (Details) - PacifiCorp [Member] - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019	Jun. 30, 2019	Dec. 31, 2018	Jun. 30, 2018	Jun. 30, 2015
Defined Benefit Plan Disclosure [Line Items]
Joint Trustee Plan, Percentage By Which Joint Trustee Plan was at Least Funded				80.00%		80.00%	80.00%
Joint Trustee Plan, Period Contributions	[1]	$ 6	$ 7		$ 7
UMWA Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Multiemployer Plans, Withdrawal Obligation, Most Recent Estimate		$ 115
[1]	PacifiCorp's minimum contributions to the plan are based on the amount of wages paid to employees covered by the Local 57 Trust Fund collective bargaining agreements, subject to ERISA minimum funding requirements.

Employee Benefit Plans - Paci_9

Employee Benefit Plans - PacifiCorp - Defined Contribution Plans (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
PacifiCorp [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Contribution Plan, Cost	$ 41	$ 40	$ 39
Pension Plan [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Interest Crediting Rates for Cash Balance Plan, Second Year	2.25%	2.94%	3.54%
Interest Crediting Rates for Cash Balance Plan, Fourth Year	2.65%	3.02%	3.56%
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year	$ 13
Defined Benefit Plan, Plan Assets, Payment for Settlement	$ 0	$ 22
Pension Plan [Member] | UNITED STATES | PacifiCorp [Member]
Defined Benefit Plan Disclosure [Line Items]
Interest Crediting Rates for Cash Balance Plan, Fourth Year	2.40%	2.70%
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year	$ 4
Supplemental Employee Retirement Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Life Insurance, Corporate or Bank Owned, Amount	303	$ 252
Supplemental Employee Retirement Plan [Member] | PacifiCorp [Member]
Defined Benefit Plan Disclosure [Line Items]
Life Insurance, Corporate or Bank Owned, Amount	$ 61	$ 57

Employee Benefit Plans - MEC -

Employee Benefit Plans - MEC - Net Periodic Benefit Cost (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Pension Plan [Member] | MidAmerican Energy Company [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement			$ 1
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	$ 7	$ 8	9
Defined Benefit Plan, Interest Cost	21	27	24
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(34)	(40)	(41)
Defined Benefit Plan Net Amortization	4	6	13
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	(10)	(11)	(21)
Other Postretirement Benefits Plan [Member] | MidAmerican Energy Company [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	4	5	5
Defined Benefit Plan, Interest Cost	7	10	8
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(14)	(13)	(13)
Defined Benefit Plan Net Amortization	(5)	(3)	(4)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	(8)	(1)	(4)
Other Postretirement Benefits Plan [Member] | MidAmerican Energy Company [Member] | MidAmerican Energy Company [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	(5)	1	(2)
UNITED STATES | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	17	16	21
Defined Benefit Plan, Interest Cost	93	111	105
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(140)	(154)	(164)
Defined Benefit Plan Net Amortization	32	31	28
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	2	4	11
UNITED STATES | Pension Plan [Member] | MidAmerican Energy Company [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	8	6	9
Defined Benefit Plan, Interest Cost	25	30	28
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(40)	(41)	(44)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement			(1)
Defined Benefit Plan Net Amortization	1	1	2
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	(6)	(4)	(6)
UNITED STATES | Pension Plan [Member] | MidAmerican Energy Company [Member] | MidAmerican Energy Company [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	$ (13)	$ (8)	$ (9)

Employee Benefit Plans - MEC _2

Employee Benefit Plans - MEC - Funded Status (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	$ 742	$ 664
Defined Benefit Plan, Plan Assets, Contributions by Employer	3	2
Defined Benefit Plan, Contributions by Plan Participants (Deprecated 2017-01-31)	8	9
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss)	40	122
Defined Benefit Plan, Plan Assets, Payment for Settlement	0	0
Defined Benefit Plan, Benefits Paid (Deprecated 2017-01-31)	(49)	(55)
Ending balance	744	742	$ 664
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Beginning balance	673	672
Defined Benefit Plan, Service Cost	7	8	9
Defined Benefit Plan, Interest Cost	21	27	24
Defined Benefit Plan, Contributions by Plan Participants (Deprecated 2017-01-31)	8	9
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)	61	12
Defined Benefit Plan, Benefit Obligation, Increase (Decrease) for Plan Amendment	0	0
Defined Benefit Plan, Benefit Obligation, Business Combination	37	0
Defined Benefit Plan, Benefit Obligation, Payment for Settlement	0	0
Benefits Paid	(49)	(55)
Ending balance	758	673	672
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Defined Benefit Plan, Funded (Unfunded) Status of Plan	(14)	69
Assets for Plan Benefits, Defined Benefit Plan	20	76
Other current liabilities	0	0
Liability, Defined Benefit Plan, Noncurrent	(34)	(7)
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position	(14)	69
Supplemental Employee Retirement Plan [Member]
Defined Benefit Plans, Supplemental Employee Retirement Plans [Abstract]
Life Insurance, Corporate or Bank Owned, Amount	303	252
MidAmerican Energy Company [Member]
Defined Benefit Plans, Supplemental Employee Retirement Plans [Abstract]
Life Insurance, Corporate or Bank Owned, Amount	211	203
MidAmerican Energy Company [Member] | Pension Plan [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Defined Benefit Plan, Benefit Obligation, Business Combination	81
MidAmerican Energy Company [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	272	247
Defined Benefit Plan, Plan Assets, Contributions by Employer	3	1
Defined Benefit Plan, Contributions by Plan Participants (Deprecated 2017-01-31)	1	2
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss)	15	42
Defined Benefit Plan, Benefits Paid (Deprecated 2017-01-31)	(13)	(20)
Ending balance	278	272	247
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Beginning balance	226	242
Defined Benefit Plan, Service Cost	4	5	5
Defined Benefit Plan, Interest Cost	7	10	8
Defined Benefit Plan, Contributions by Plan Participants (Deprecated 2017-01-31)	1	2
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)	42	(13)
Defined Benefit Plan, Benefit Obligation, Business Combination	37	0
Benefits Paid	(13)	(20)
Ending balance	304	226	242
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Defined Benefit Plan, Funded (Unfunded) Status of Plan	(26)	46
Assets for Plan Benefits, Defined Benefit Plan	0	46
Other current liabilities	0	0
Liability, Defined Benefit Plan, Noncurrent	(26)	0
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position	(26)	46
MidAmerican Energy Company [Member] | MidAmerican Energy Company [Member] | Supplemental Employee Retirement Plan [Member]
Defined Benefit Plans, Supplemental Employee Retirement Plans [Abstract]
Life Insurance, Corporate or Bank Owned, Amount	130	122
UNITED STATES | Pension Plan [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	2,656	2,396
Defined Benefit Plan, Plan Assets, Contributions by Employer	13	12
Defined Benefit Plan, Contributions by Plan Participants (Deprecated 2017-01-31)	0	0
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss)	373	456
Defined Benefit Plan, Plan Assets, Payment for Settlement	0	(22)
Defined Benefit Plan, Benefits Paid (Deprecated 2017-01-31)	(218)	(186)
Ending balance	2,824	2,656	2,396
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Beginning balance	2,878	2,718
Defined Benefit Plan, Service Cost	17	16	21
Defined Benefit Plan, Interest Cost	93	111	105
Defined Benefit Plan, Contributions by Plan Participants (Deprecated 2017-01-31)	0	0
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)	226	242
Defined Benefit Plan, Benefit Obligation, Increase (Decrease) for Plan Amendment	0	(1)
Defined Benefit Plan, Benefit Obligation, Business Combination	81	0
Defined Benefit Plan, Benefit Obligation, Payment for Settlement	0	22
Benefits Paid	(218)	(186)
Ending balance	3,077	2,878	2,718
Defined Benefit Plan, Accumulated Benefit Obligation	2,999	2,867
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Defined Benefit Plan, Funded (Unfunded) Status of Plan	(253)	(222)
Assets for Plan Benefits, Defined Benefit Plan	43	73
Other current liabilities	(13)	(13)
Liability, Defined Benefit Plan, Noncurrent	(283)	(282)
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position	(253)	(222)
UNITED STATES | MidAmerican Energy Company [Member] | Pension Plan [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	717	644
Defined Benefit Plan, Plan Assets, Contributions by Employer	6	7
Defined Benefit Plan, Contributions by Plan Participants (Deprecated 2017-01-31)	0	0
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss)	55	123
Defined Benefit Plan, Benefits Paid (Deprecated 2017-01-31)	(60)	(57)
Ending balance	718	717	644
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Beginning balance	763	736
Defined Benefit Plan, Service Cost	8	6	9
Defined Benefit Plan, Interest Cost	25	30	28
Defined Benefit Plan, Contributions by Plan Participants (Deprecated 2017-01-31)	0	0
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)	28	48
Defined Benefit Plan, Benefit Obligation, Business Combination	81	0
Benefits Paid	(60)	(57)
Ending balance	845	763	$ 736
Defined Benefit Plan, Accumulated Benefit Obligation	773	758
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Defined Benefit Plan, Funded (Unfunded) Status of Plan	(127)	(46)
Assets for Plan Benefits, Defined Benefit Plan	0	66
Other current liabilities	(7)	(7)
Liability, Defined Benefit Plan, Noncurrent	(120)	(105)
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position	(127)	(46)
UNITED STATES | MidAmerican Energy Company [Member] | Supplemental Employee Retirement Plan [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Beginning balance	112
Ending balance	117	112
Defined Benefit Plan, Accumulated Benefit Obligation	$ 117	$ 112

Employee Benefit Plans - MEC _3

Employee Benefit Plans - MEC - Unrecognized Amounts (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Before Tax	$ 618	$ 549
Pension Plan [Member] | MidAmerican Energy Company [Member]
Defined Benefit Plan, Reconciliation of Amounts Not Yet Recognized As Components of Net Periodic Benefit Cost [Roll Forward]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement			$ (1)
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Net Gains (Losses), Before Tax	34	(23)
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Net Prior Service Cost (Credit), Before Tax	(9)	(14)
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Before Tax	28	(31)	35
Defined Benefit Plan, Reconciliation of Amounts Not Yet Recognized As Components of Net Periodic Benefit Cost [Roll Forward]
Defined Benefit Plan, Net Unamortized Gain (Loss) Arising During Period, Before Tax	55	(72)
Defined Benefit Plan, Net Amortization Recognized in Net Periodic Benefit Cost Before Tax	4	6
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Arising During Period, Before Tax	59	(66)
Other Postretirement Benefits Plan [Member] | Regulatory Asset, Pension and Other Postretirement Costs [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Before Tax	47	4	44
Defined Benefit Plan, Reconciliation of Amounts Not Yet Recognized As Components of Net Periodic Benefit Cost [Roll Forward]
Defined Benefit Plan, Net Unamortized Gain (Loss) Arising During Period, Before Tax	36	(45)
Defined Benefit Plan, Net Amortization Recognized in Net Periodic Benefit Cost Before Tax	7	5
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Arising During Period, Before Tax	43	(40)
Other Postretirement Benefits Plan [Member] | Regulatory Liability, Pension and Other Postretirement Costs [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Before Tax	(23)	(32)	(10)
Defined Benefit Plan, Reconciliation of Amounts Not Yet Recognized As Components of Net Periodic Benefit Cost [Roll Forward]
Defined Benefit Plan, Net Unamortized Gain (Loss) Arising During Period, Before Tax	12	(23)
Defined Benefit Plan, Net Amortization Recognized in Net Periodic Benefit Cost Before Tax	(3)	1
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Arising During Period, Before Tax	9	(22)
Other Postretirement Benefits Plan [Member] | MidAmerican Energy Company [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Net Gains (Losses), Before Tax	45	4
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Net Prior Service Cost (Credit), Before Tax	(9)	(14)
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Before Tax	36	(10)	28
Defined Benefit Plan, Reconciliation of Amounts Not Yet Recognized As Components of Net Periodic Benefit Cost [Roll Forward]
Defined Benefit Plan, Net Unamortized Gain (Loss) Arising During Period, Before Tax	41	(42)
Defined Benefit Plan, Net Amortization Recognized in Net Periodic Benefit Cost Before Tax	5	4
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Arising During Period, Before Tax	46	(38)
Other Postretirement Benefits Plan [Member] | MidAmerican Energy Company [Member] | Regulatory Asset, Pension and Other Postretirement Costs [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Before Tax	45	7	37
Defined Benefit Plan, Reconciliation of Amounts Not Yet Recognized As Components of Net Periodic Benefit Cost [Roll Forward]
Defined Benefit Plan, Net Unamortized Gain (Loss) Arising During Period, Before Tax	34	(33)
Defined Benefit Plan, Net Amortization Recognized in Net Periodic Benefit Cost Before Tax	4	3
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Arising During Period, Before Tax	38	(30)
Other Postretirement Benefits Plan [Member] | MidAmerican Energy Company [Member] | Receivables (Payables) With Affiliates [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Before Tax	(9)	(17)	(9)
Defined Benefit Plan, Reconciliation of Amounts Not Yet Recognized As Components of Net Periodic Benefit Cost [Roll Forward]
Defined Benefit Plan, Net Unamortized Gain (Loss) Arising During Period, Before Tax	7	(9)
Defined Benefit Plan, Net Amortization Recognized in Net Periodic Benefit Cost Before Tax	1	1
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Arising During Period, Before Tax	8	(8)
UNITED STATES | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Net Gains (Losses), Before Tax	612	653
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Net Prior Service Cost (Credit), Before Tax	(1)	(2)
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Before Tax	613	652	746
Defined Benefit Plan, Reconciliation of Amounts Not Yet Recognized As Components of Net Periodic Benefit Cost [Roll Forward]
Defined Benefit Plan, Net Unamortized Gain (Loss) Arising During Period, Before Tax	(7)	(61)
Defined Benefit Plan, Net Amortization Recognized in Net Periodic Benefit Cost Before Tax	(32)	(31)
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Arising During Period, Before Tax	(39)	(94)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit), Net		2
UNITED STATES | Pension Plan [Member] | Regulatory Asset, Pension and Other Postretirement Costs [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Before Tax	600	661	730
Defined Benefit Plan, Reconciliation of Amounts Not Yet Recognized As Components of Net Periodic Benefit Cost [Roll Forward]
Defined Benefit Plan, Net Unamortized Gain (Loss) Arising During Period, Before Tax	(30)	(38)
Defined Benefit Plan, Net Amortization Recognized in Net Periodic Benefit Cost Before Tax	(31)	(31)
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Arising During Period, Before Tax	(61)	(69)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit), Net		0
UNITED STATES | Pension Plan [Member] | Regulatory Liability, Pension and Other Postretirement Costs [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Before Tax	(20)	(33)	0
Defined Benefit Plan, Reconciliation of Amounts Not Yet Recognized As Components of Net Periodic Benefit Cost [Roll Forward]
Defined Benefit Plan, Net Unamortized Gain (Loss) Arising During Period, Before Tax	13	(33)
Defined Benefit Plan, Net Amortization Recognized in Net Periodic Benefit Cost Before Tax	0	0
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Arising During Period, Before Tax	13	(33)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit), Net		0
UNITED STATES | Pension Plan [Member] | MidAmerican Energy Company [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Net Gains (Losses), Before Tax	18	6
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Net Prior Service Cost (Credit), Before Tax	0	(1)
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Before Tax	18	5	41
Defined Benefit Plan, Reconciliation of Amounts Not Yet Recognized As Components of Net Periodic Benefit Cost [Roll Forward]
Defined Benefit Plan, Net Unamortized Gain (Loss) Arising During Period, Before Tax	14	(35)
Defined Benefit Plan, Net Amortization Recognized in Net Periodic Benefit Cost Before Tax	(1)	(1)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement			1
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Arising During Period, Before Tax	13	(36)
UNITED STATES | Pension Plan [Member] | MidAmerican Energy Company [Member] | Regulatory Asset, Pension and Other Postretirement Costs [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Before Tax	21	19	25
Defined Benefit Plan, Reconciliation of Amounts Not Yet Recognized As Components of Net Periodic Benefit Cost [Roll Forward]
Defined Benefit Plan, Net Unamortized Gain (Loss) Arising During Period, Before Tax	3	(5)
Defined Benefit Plan, Net Amortization Recognized in Net Periodic Benefit Cost Before Tax	(1)	(1)
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Arising During Period, Before Tax	2	(6)
UNITED STATES | Pension Plan [Member] | MidAmerican Energy Company [Member] | Regulatory Liability, Pension and Other Postretirement Costs [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Before Tax	(20)	(32)	0
Defined Benefit Plan, Reconciliation of Amounts Not Yet Recognized As Components of Net Periodic Benefit Cost [Roll Forward]
Defined Benefit Plan, Net Unamortized Gain (Loss) Arising During Period, Before Tax	12	(32)
Defined Benefit Plan, Net Amortization Recognized in Net Periodic Benefit Cost Before Tax	0	0
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Arising During Period, Before Tax	12	(32)
UNITED STATES | Pension Plan [Member] | MidAmerican Energy Company [Member] | Receivables (Payables) With Affiliates [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Before Tax	17	18	$ 16
Defined Benefit Plan, Reconciliation of Amounts Not Yet Recognized As Components of Net Periodic Benefit Cost [Roll Forward]
Defined Benefit Plan, Net Unamortized Gain (Loss) Arising During Period, Before Tax	(1)	2
Defined Benefit Plan, Net Amortization Recognized in Net Periodic Benefit Cost Before Tax	0	0
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Arising During Period, Before Tax	$ (1)	$ 2

Employee Benefit Plans - MEC _4

Employee Benefit Plans - MEC - Plan Assumptions (Details)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Health Care Cost Trend Rate Assumed, Next Fiscal Year	6.30%	6.50%
Defined Benefit Plan, Ultimate Health Care Cost Trend Rate	5.00%	5.00%
United States Non-Union Postretirement Benefit Plans of US Entity, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	2.59%	3.24%	4.21%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	3.24%	4.21%	3.57%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets	5.42%	6.39%	6.44%
MidAmerican Energy Company [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Health Care Cost Trend Rate Assumed, Next Fiscal Year	6.20%	6.50%
Defined Benefit Plan, Ultimate Health Care Cost Trend Rate	5.00%	5.00%
Defined Benefit Plan, Year Health Care Cost Trend Rate Reaches Ultimate Trend Rate	2025	2025
MidAmerican Energy Company [Member] | United States Non-Union Postretirement Benefit Plans of US Entity, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	2.65%	3.20%	4.15%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	3.20%	4.15%	3.50%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets	6.00%	6.25%	6.25%
UNITED STATES | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	2.60%	3.32%	4.25%
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Rate of Compensation Increase	2.75%	2.75%	2.75%
Interest Crediting Rates for Cash Balance Plan, First Year	2.44%	3.22%	3.38%
Interest Crediting Rates for Cash Balance Plan, Second Year	2.25%	2.94%	3.54%
Interest Crediting Rates for Cash Balance Plan, Third Year	2.25%	2.94%	3.54%
Interest Crediting Rates for Cash Balance Plan, Fourth Year	2.65%	3.02%	3.56%
Interest Crediting Rates for Cash Balance Plan, Fifth Year		3.02%	3.56%
Interest Crediting Rates for Cash Balance Plan, Sixth Year			3.56%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	3.32%	4.25%	3.60%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets	5.94%	6.48%	6.36%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase	2.75%	2.75%	2.75%
UNITED STATES | MidAmerican Energy Company [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	2.75%	3.40%	4.25%
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Rate of Compensation Increase	2.75%	2.75%	2.75%
Interest Crediting Rates for Cash Balance Plan, First Year	2.27%	3.40%	2.26%
Interest Crediting Rates for Cash Balance Plan, Second Year	0.99%	2.27%	3.40%
Interest Crediting Rates for Cash Balance Plan, Third Year	0.99%	2.27%	3.40%
Interest Crediting Rates for Cash Balance Plan, Fourth Year	0.99%	2.27%	3.40%
Interest Crediting Rates for Cash Balance Plan, Fifth Year		2.27%	3.40%
Interest Crediting Rates for Cash Balance Plan, Sixth Year			3.40%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	3.40%	4.25%	3.60%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets	6.25%	6.50%	6.50%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase	2.75%	2.75%	2.75%
Interest crediting rates for cash balance plan	2.27%	3.40%	2.26%
After-tax [Member] | MidAmerican Energy Company [Member] | United States Non-Union Postretirement Benefit Plans of US Entity, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets	4.62%	4.62%	4.13%

Employee Benefit Plans - MEC _5

Employee Benefit Plans - MEC - Contributions and Benefit Payments (Details) $ in Millions	Dec. 31, 2020USD ($)
Pension Plan [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year	$ 13
Defined Benefit Plan, Expected Future Benefit Payment, Next Twelve Months	236
Defined Benefit Plan, Expected Future Benefit Payment, Year Two	219
Defined Benefit Plan, Expected Future Benefit Payment, Year Three	220
Defined Benefit Plan, Expected Future Benefit Payment, Year Four	211
Defined Benefit Plan, Expected Future Benefit Payment, Year Five	206
Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter	926
Pension Plan [Member] | MidAmerican Energy Company [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year	7
Defined Benefit Plan, Expected Future Benefit Payment, Next Twelve Months	64
Defined Benefit Plan, Expected Future Benefit Payment, Year Two	62
Defined Benefit Plan, Expected Future Benefit Payment, Year Three	60
Defined Benefit Plan, Expected Future Benefit Payment, Year Four	58
Defined Benefit Plan, Expected Future Benefit Payment, Year Five	56
Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter	248
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Expected Future Benefit Payment, Next Twelve Months	53
Defined Benefit Plan, Expected Future Benefit Payment, Year Two	54
Defined Benefit Plan, Expected Future Benefit Payment, Year Three	54
Defined Benefit Plan, Expected Future Benefit Payment, Year Four	54
Defined Benefit Plan, Expected Future Benefit Payment, Year Five	52
Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter	238
Other Postretirement Benefits Plan [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year	14
Other Postretirement Benefits Plan [Member] | MidAmerican Energy Company [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year	12
Defined Benefit Plan, Expected Future Benefit Payment, Next Twelve Months	20
Defined Benefit Plan, Expected Future Benefit Payment, Year Two	21
Defined Benefit Plan, Expected Future Benefit Payment, Year Three	22
Defined Benefit Plan, Expected Future Benefit Payment, Year Four	23
Defined Benefit Plan, Expected Future Benefit Payment, Year Five	22
Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter	$ 104

Employee Benefit Plans - MEC _6

Employee Benefit Plans - MEC - Asset Allocations (Details) - MidAmerican Energy Company [Member]	12 Months Ended
	Dec. 31, 2020
Minimum [Member] | Pension Plan [Member] | Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description	50	[1]
Minimum [Member] | Pension Plan [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description	20	[1]
Minimum [Member] | Pension Plan [Member] | Real Estate Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description	0
Minimum [Member] | Pension Plan [Member] | Other Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description	0
Minimum [Member] | Pension Plan [Member] | Debt Securities [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description	50
Minimum [Member] | Pension Plan [Member] | Equity Securities [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description	20
Minimum [Member] | Pension Plan [Member] | Real Estate Funds [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description	0
Minimum [Member] | Pension Plan [Member] | Other Securities [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description	0
Minimum [Member] | Other Postretirement Benefits Plan [Member] | Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description	60	[1]
Minimum [Member] | Other Postretirement Benefits Plan [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description	30	[1]
Minimum [Member] | Other Postretirement Benefits Plan [Member] | Real Estate Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description	—
Minimum [Member] | Other Postretirement Benefits Plan [Member] | Other Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description	0
Minimum [Member] | Other Postretirement Benefits Plan [Member] | Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description	60
Minimum [Member] | Other Postretirement Benefits Plan [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description	30
Minimum [Member] | Other Postretirement Benefits Plan [Member] | Other Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description	0
Maximum [Member] | Pension Plan [Member] | Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description	80	[1]
Maximum [Member] | Pension Plan [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description	50	[1]
Maximum [Member] | Pension Plan [Member] | Real Estate Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description	5
Maximum [Member] | Pension Plan [Member] | Other Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description	5
Maximum [Member] | Pension Plan [Member] | Debt Securities [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description	80
Maximum [Member] | Pension Plan [Member] | Equity Securities [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description	50
Maximum [Member] | Pension Plan [Member] | Real Estate Funds [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description	5
Maximum [Member] | Pension Plan [Member] | Other Securities [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description	5
Maximum [Member] | Other Postretirement Benefits Plan [Member] | Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description	70	[1]
Maximum [Member] | Other Postretirement Benefits Plan [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description	40	[1]
Maximum [Member] | Other Postretirement Benefits Plan [Member] | Real Estate Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description	—
Maximum [Member] | Other Postretirement Benefits Plan [Member] | Other Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description	5
Maximum [Member] | Other Postretirement Benefits Plan [Member] | Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description	70
Maximum [Member] | Other Postretirement Benefits Plan [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description	40
Maximum [Member] | Other Postretirement Benefits Plan [Member] | Real Estate Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description	—
Maximum [Member] | Other Postretirement Benefits Plan [Member] | Other Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description	5
[1]	For purposes of target allocation percentages and consistent with the plans' investment policy, investment funds are allocated based on the underlying investments in debt and equity securities.

Employee Benefit Plans - MEC _7

Employee Benefit Plans - MEC - Fair Value Measurements (Details) - USD ($) $ in Millions		Dec. 31, 2020	Dec. 31, 2019		Dec. 31, 2018
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		$ 744	$ 742		$ 664
Other Postretirement Benefits Plan [Member] | Defined Benefit Plan, Assets Before Investment Funds, Partnership Interests And Real Estate Funds | Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		573	568
Other Postretirement Benefits Plan [Member] | Defined Benefit Plan, Assets Before Investment Funds, Partnership Interests And Real Estate Funds | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		340	433
Other Postretirement Benefits Plan [Member] | Defined Benefit Plan, Assets Before Investment Funds, Partnership Interests And Real Estate Funds | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		233	135
Other Postretirement Benefits Plan [Member] | US Treasury Securities [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		15	23
Other Postretirement Benefits Plan [Member] | US Treasury Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		15	23
Other Postretirement Benefits Plan [Member] | US Treasury Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Other Postretirement Benefits Plan [Member] | Corporate Debt Securities [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		102	44
Other Postretirement Benefits Plan [Member] | Corporate Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Other Postretirement Benefits Plan [Member] | Corporate Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		102	44
Other Postretirement Benefits Plan [Member] | Municipal Bonds [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		82	57
Other Postretirement Benefits Plan [Member] | Municipal Bonds [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Other Postretirement Benefits Plan [Member] | Municipal Bonds [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		82	57
Other Postretirement Benefits Plan [Member] | Domestic Equity Securities [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		6	151
Other Postretirement Benefits Plan [Member] | Domestic Equity Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		6	151	[1]
Other Postretirement Benefits Plan [Member] | Domestic Equity Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		$ 0	0	[1]
Other Postretirement Benefits Plan [Member] | Foreign Equity Securities [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount			6
Other Postretirement Benefits Plan [Member] | Foreign Equity Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	[1]		6
Other Postretirement Benefits Plan [Member] | Foreign Equity Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount			$ 0
Other Postretirement Benefits Plan [Member] | Equity Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Percentage of Investment Funds Comprised of Equity Securitites		40.00%	58.00%
Percentage of Investment Funds Comprised of Debt Securities		60.00%	42.00%
Percentage of Investment Funds Invested in United States Securities		79.00%	75.00%
Percentage of Investment Funds Invested in International Securities		21.00%	25.00%
Other Postretirement Benefits Plan [Member] | Equity Funds [Member] | Fair Value Measured at Net Asset Value Per Share [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		$ 167	$ 169	[2]
Other Postretirement Benefits Plan [Member] | MidAmerican Energy Company [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		278	272		247
Other Postretirement Benefits Plan [Member] | MidAmerican Energy Company [Member] | Defined Benefit Plan, Assets Before Investment Funds, Partnership Interests And Real Estate Funds | Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		278	272
Other Postretirement Benefits Plan [Member] | MidAmerican Energy Company [Member] | Defined Benefit Plan, Assets Before Investment Funds, Partnership Interests And Real Estate Funds | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		203	195
Other Postretirement Benefits Plan [Member] | MidAmerican Energy Company [Member] | Defined Benefit Plan, Assets Before Investment Funds, Partnership Interests And Real Estate Funds | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		75	77
Other Postretirement Benefits Plan [Member] | MidAmerican Energy Company [Member] | Defined Benefit Plan, Assets Before Investment Funds, Partnership Interests And Real Estate Funds | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Other Postretirement Benefits Plan [Member] | MidAmerican Energy Company [Member] | Cash Equivalents [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		11	6
Other Postretirement Benefits Plan [Member] | MidAmerican Energy Company [Member] | Cash Equivalents [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		11	6
Other Postretirement Benefits Plan [Member] | MidAmerican Energy Company [Member] | Cash Equivalents [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Other Postretirement Benefits Plan [Member] | MidAmerican Energy Company [Member] | Cash Equivalents [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Other Postretirement Benefits Plan [Member] | MidAmerican Energy Company [Member] | US Treasury Securities [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		3	6
Other Postretirement Benefits Plan [Member] | MidAmerican Energy Company [Member] | US Treasury Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		3	6
Other Postretirement Benefits Plan [Member] | MidAmerican Energy Company [Member] | US Treasury Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Other Postretirement Benefits Plan [Member] | MidAmerican Energy Company [Member] | US Treasury Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Other Postretirement Benefits Plan [Member] | MidAmerican Energy Company [Member] | Corporate Debt Securities [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		7	12
Other Postretirement Benefits Plan [Member] | MidAmerican Energy Company [Member] | Corporate Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Other Postretirement Benefits Plan [Member] | MidAmerican Energy Company [Member] | Corporate Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		7	12
Other Postretirement Benefits Plan [Member] | MidAmerican Energy Company [Member] | Corporate Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Other Postretirement Benefits Plan [Member] | MidAmerican Energy Company [Member] | Municipal Bonds [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		65	55
Other Postretirement Benefits Plan [Member] | MidAmerican Energy Company [Member] | Municipal Bonds [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Other Postretirement Benefits Plan [Member] | MidAmerican Energy Company [Member] | Municipal Bonds [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		65	55
Other Postretirement Benefits Plan [Member] | MidAmerican Energy Company [Member] | Municipal Bonds [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Other Postretirement Benefits Plan [Member] | MidAmerican Energy Company [Member] | US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		3	10
Other Postretirement Benefits Plan [Member] | MidAmerican Energy Company [Member] | US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Other Postretirement Benefits Plan [Member] | MidAmerican Energy Company [Member] | US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		3	10
Other Postretirement Benefits Plan [Member] | MidAmerican Energy Company [Member] | US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		$ 0	0
Other Postretirement Benefits Plan [Member] | MidAmerican Energy Company [Member] | Domestic Equity Securities [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount			75
Other Postretirement Benefits Plan [Member] | MidAmerican Energy Company [Member] | Domestic Equity Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount			75
Other Postretirement Benefits Plan [Member] | MidAmerican Energy Company [Member] | Domestic Equity Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount			0
Other Postretirement Benefits Plan [Member] | MidAmerican Energy Company [Member] | Domestic Equity Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount			$ 0
Other Postretirement Benefits Plan [Member] | MidAmerican Energy Company [Member] | Equity Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Percentage of Investment Funds Comprised of Equity Securitites		56.00%	77.00%
Percentage of Investment Funds Comprised of Debt Securities		44.00%	23.00%
Percentage of Investment Funds Invested in United States Securities		56.00%	42.00%
Percentage of Investment Funds Invested in International Securities		44.00%	58.00%
Other Postretirement Benefits Plan [Member] | MidAmerican Energy Company [Member] | Equity Funds [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	[3]	$ 189	$ 108
Other Postretirement Benefits Plan [Member] | MidAmerican Energy Company [Member] | Equity Funds [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	[3]	189	108
Other Postretirement Benefits Plan [Member] | MidAmerican Energy Company [Member] | Equity Funds [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	[3]	0	0
Other Postretirement Benefits Plan [Member] | MidAmerican Energy Company [Member] | Equity Funds [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	[3]	0	0
Other Postretirement Benefits Plan [Member] | PacifiCorp [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		327	334		297
Other Postretirement Benefits Plan [Member] | PacifiCorp [Member] | Defined Benefit Plan, Assets Before Investment Funds, Partnership Interests And Real Estate Funds | Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		170	193
Other Postretirement Benefits Plan [Member] | PacifiCorp [Member] | Defined Benefit Plan, Assets Before Investment Funds, Partnership Interests And Real Estate Funds | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		23	142
Other Postretirement Benefits Plan [Member] | PacifiCorp [Member] | Defined Benefit Plan, Assets Before Investment Funds, Partnership Interests And Real Estate Funds | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		147	51
Other Postretirement Benefits Plan [Member] | PacifiCorp [Member] | Defined Benefit Plan, Assets Before Investment Funds, Partnership Interests And Real Estate Funds | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Other Postretirement Benefits Plan [Member] | PacifiCorp [Member] | Cash Equivalents [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		9	9
Other Postretirement Benefits Plan [Member] | PacifiCorp [Member] | Cash Equivalents [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		8	8
Other Postretirement Benefits Plan [Member] | PacifiCorp [Member] | Cash Equivalents [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		1	1
Other Postretirement Benefits Plan [Member] | PacifiCorp [Member] | Cash Equivalents [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Other Postretirement Benefits Plan [Member] | PacifiCorp [Member] | US Treasury Securities [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		11	12
Other Postretirement Benefits Plan [Member] | PacifiCorp [Member] | US Treasury Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		11	12
Other Postretirement Benefits Plan [Member] | PacifiCorp [Member] | US Treasury Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Other Postretirement Benefits Plan [Member] | PacifiCorp [Member] | US Treasury Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Other Postretirement Benefits Plan [Member] | PacifiCorp [Member] | Corporate Debt Securities [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		86	26
Other Postretirement Benefits Plan [Member] | PacifiCorp [Member] | Corporate Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Other Postretirement Benefits Plan [Member] | PacifiCorp [Member] | Corporate Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		86	26
Other Postretirement Benefits Plan [Member] | PacifiCorp [Member] | Corporate Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Other Postretirement Benefits Plan [Member] | PacifiCorp [Member] | Municipal Bonds [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		16	2
Other Postretirement Benefits Plan [Member] | PacifiCorp [Member] | Municipal Bonds [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Other Postretirement Benefits Plan [Member] | PacifiCorp [Member] | Municipal Bonds [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		16	2
Other Postretirement Benefits Plan [Member] | PacifiCorp [Member] | Municipal Bonds [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Other Postretirement Benefits Plan [Member] | PacifiCorp [Member] | US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		44	22
Other Postretirement Benefits Plan [Member] | PacifiCorp [Member] | US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Other Postretirement Benefits Plan [Member] | PacifiCorp [Member] | US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		44	22
Other Postretirement Benefits Plan [Member] | PacifiCorp [Member] | US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Other Postretirement Benefits Plan [Member] | PacifiCorp [Member] | Domestic Equity Securities [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		4	74
Other Postretirement Benefits Plan [Member] | PacifiCorp [Member] | Domestic Equity Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		4	74
Other Postretirement Benefits Plan [Member] | PacifiCorp [Member] | Domestic Equity Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Other Postretirement Benefits Plan [Member] | PacifiCorp [Member] | Domestic Equity Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		$ 0	0
Other Postretirement Benefits Plan [Member] | PacifiCorp [Member] | Foreign Equity Securities [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount			4
Other Postretirement Benefits Plan [Member] | PacifiCorp [Member] | Foreign Equity Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount			4
Other Postretirement Benefits Plan [Member] | PacifiCorp [Member] | Foreign Equity Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount			0
Other Postretirement Benefits Plan [Member] | PacifiCorp [Member] | Foreign Equity Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount			$ 0
Other Postretirement Benefits Plan [Member] | PacifiCorp [Member] | Equity Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Percentage of Investment Funds Comprised of Equity Securitites		38.00%	56.00%
Percentage of Investment Funds Comprised of Debt Securities		62.00%	44.00%
Percentage of Investment Funds Invested in United States Securities		93.00%	79.00%
Percentage of Investment Funds Invested in International Securities		7.00%	21.00%
Other Postretirement Benefits Plan [Member] | PacifiCorp [Member] | Equity Funds [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount			$ 44
Other Postretirement Benefits Plan [Member] | PacifiCorp [Member] | Equity Funds [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount			44
Other Postretirement Benefits Plan [Member] | PacifiCorp [Member] | Equity Funds [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount			0
Other Postretirement Benefits Plan [Member] | PacifiCorp [Member] | Equity Funds [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount			0
Other Postretirement Benefits Plan [Member] | PacifiCorp [Member] | Equity Funds [Member] | Fair Value Measured at Net Asset Value Per Share [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	[4]	$ 153	136
Pension Plan [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		2,824	2,656		2,396
Pension Plan [Member] | Real Estate Funds [Member] | Fair Value Measured at Net Asset Value Per Share [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		43	42
Pension Plan [Member] | Defined Benefit Plan, Assets Before Investment Funds, Partnership Interests And Real Estate Funds | Fair Value, Inputs, Level 1, 2 and 3 [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		1,172	1,606
Pension Plan [Member] | Defined Benefit Plan, Assets Before Investment Funds, Partnership Interests And Real Estate Funds | Fair Value, Inputs, Level 1 [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		276	1,045
Pension Plan [Member] | Defined Benefit Plan, Assets Before Investment Funds, Partnership Interests And Real Estate Funds | Fair Value, Inputs, Level 2 [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		896	561	[5]
Pension Plan [Member] | US Treasury Securities [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		52	210
Pension Plan [Member] | US Treasury Securities [Member] | Fair Value, Inputs, Level 1 [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		52	210
Pension Plan [Member] | US Treasury Securities [Member] | Fair Value, Inputs, Level 2 [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0	[5]
Pension Plan [Member] | Corporate Debt Securities [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		748	376
Pension Plan [Member] | Corporate Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0	[5]
Pension Plan [Member] | Corporate Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		748	376	[5]
Pension Plan [Member] | Municipal Bonds [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		69	28
Pension Plan [Member] | Municipal Bonds [Member] | Fair Value, Inputs, Level 1 [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0	[5]
Pension Plan [Member] | Municipal Bonds [Member] | Fair Value, Inputs, Level 2 [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		69	28
Pension Plan [Member] | US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount			115
Pension Plan [Member] | US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount			0
Pension Plan [Member] | US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount			115
Pension Plan [Member] | Domestic Equity Securities [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		224	548
Pension Plan [Member] | Domestic Equity Securities [Member] | Fair Value, Inputs, Level 1 [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		224	547	[5]
Pension Plan [Member] | Domestic Equity Securities [Member] | Fair Value, Inputs, Level 2 [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		$ 0	1	[5]
Pension Plan [Member] | Foreign Equity Securities [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount			136
Pension Plan [Member] | Foreign Equity Securities [Member] | Fair Value, Inputs, Level 1 [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount			136
Pension Plan [Member] | Foreign Equity Securities [Member] | Fair Value, Inputs, Level 2 [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	[5]		$ 0
Pension Plan [Member] | Equity Funds [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Percentage of Investment Funds Comprised of Equity Securitites		69.00%	62.00%
Percentage of Investment Funds Comprised of Debt Securities		31.00%	38.00%
Percentage of Investment Funds Invested in United States Securities		79.00%	66.00%
Percentage of Investment Funds Invested in International Securities		21.00%	34.00%
Pension Plan [Member] | Equity Funds [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	[6]		$ 125
Pension Plan [Member] | Equity Funds [Member] | Fair Value, Inputs, Level 1 [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	[5],[6]		125
Pension Plan [Member] | Equity Funds [Member] | Fair Value, Inputs, Level 2 [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount			0
Pension Plan [Member] | Equity Funds [Member] | Fair Value Measured at Net Asset Value Per Share [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		$ 1,521	915	[6]
Pension Plan [Member] | MidAmerican Energy Company [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		718	717		644
Pension Plan [Member] | MidAmerican Energy Company [Member] | Real Estate Funds [Member] | Fair Value Measured at Net Asset Value Per Share [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		43	42
Pension Plan [Member] | MidAmerican Energy Company [Member] | Defined Benefit Plan, Assets Before Investment Funds, Partnership Interests And Real Estate Funds | Fair Value, Inputs, Level 1, 2 and 3 [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		282	376
Pension Plan [Member] | MidAmerican Energy Company [Member] | Defined Benefit Plan, Assets Before Investment Funds, Partnership Interests And Real Estate Funds | Fair Value, Inputs, Level 1 [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		79	277
Pension Plan [Member] | MidAmerican Energy Company [Member] | Defined Benefit Plan, Assets Before Investment Funds, Partnership Interests And Real Estate Funds | Fair Value, Inputs, Level 2 [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		203	99
Pension Plan [Member] | MidAmerican Energy Company [Member] | Defined Benefit Plan, Assets Before Investment Funds, Partnership Interests And Real Estate Funds | Fair Value, Inputs, Level 3 [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Pension Plan [Member] | MidAmerican Energy Company [Member] | Cash Equivalents [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		26	21
Pension Plan [Member] | MidAmerican Energy Company [Member] | Cash Equivalents [Member] | Fair Value, Inputs, Level 1 [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	21
Pension Plan [Member] | MidAmerican Energy Company [Member] | Cash Equivalents [Member] | Fair Value, Inputs, Level 2 [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		26	0
Pension Plan [Member] | MidAmerican Energy Company [Member] | Cash Equivalents [Member] | Fair Value, Inputs, Level 3 [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Pension Plan [Member] | MidAmerican Energy Company [Member] | US Treasury Securities [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		14	16
Pension Plan [Member] | MidAmerican Energy Company [Member] | US Treasury Securities [Member] | Fair Value, Inputs, Level 1 [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		14	16
Pension Plan [Member] | MidAmerican Energy Company [Member] | US Treasury Securities [Member] | Fair Value, Inputs, Level 2 [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Pension Plan [Member] | MidAmerican Energy Company [Member] | US Treasury Securities [Member] | Fair Value, Inputs, Level 3 [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Pension Plan [Member] | MidAmerican Energy Company [Member] | Corporate Debt Securities [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		160	61
Pension Plan [Member] | MidAmerican Energy Company [Member] | Corporate Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Pension Plan [Member] | MidAmerican Energy Company [Member] | Corporate Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		160	61
Pension Plan [Member] | MidAmerican Energy Company [Member] | Corporate Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Pension Plan [Member] | MidAmerican Energy Company [Member] | Municipal Bonds [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		17	5
Pension Plan [Member] | MidAmerican Energy Company [Member] | Municipal Bonds [Member] | Fair Value, Inputs, Level 1 [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Pension Plan [Member] | MidAmerican Energy Company [Member] | Municipal Bonds [Member] | Fair Value, Inputs, Level 2 [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		17	5
Pension Plan [Member] | MidAmerican Energy Company [Member] | Municipal Bonds [Member] | Fair Value, Inputs, Level 3 [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Pension Plan [Member] | MidAmerican Energy Company [Member] | US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount			33
Pension Plan [Member] | MidAmerican Energy Company [Member] | US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount			0
Pension Plan [Member] | MidAmerican Energy Company [Member] | US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount			33
Pension Plan [Member] | MidAmerican Energy Company [Member] | US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount			0
Pension Plan [Member] | MidAmerican Energy Company [Member] | Domestic Equity Securities [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		65	129
Pension Plan [Member] | MidAmerican Energy Company [Member] | Domestic Equity Securities [Member] | Fair Value, Inputs, Level 1 [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		65	129
Pension Plan [Member] | MidAmerican Energy Company [Member] | Domestic Equity Securities [Member] | Fair Value, Inputs, Level 2 [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Pension Plan [Member] | MidAmerican Energy Company [Member] | Domestic Equity Securities [Member] | Fair Value, Inputs, Level 3 [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		$ 0	0
Pension Plan [Member] | MidAmerican Energy Company [Member] | Foreign Equity Securities [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount			42
Pension Plan [Member] | MidAmerican Energy Company [Member] | Foreign Equity Securities [Member] | Fair Value, Inputs, Level 1 [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount			42
Pension Plan [Member] | MidAmerican Energy Company [Member] | Foreign Equity Securities [Member] | Fair Value, Inputs, Level 2 [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount			0
Pension Plan [Member] | MidAmerican Energy Company [Member] | Foreign Equity Securities [Member] | Fair Value, Inputs, Level 3 [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount			$ 0
Pension Plan [Member] | MidAmerican Energy Company [Member] | Equity Funds [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Percentage of Investment Funds Comprised of Equity Securitites		65.00%	69.00%
Percentage of Investment Funds Comprised of Debt Securities		35.00%	31.00%
Percentage of Investment Funds Invested in United States Securities		82.00%	74.00%
Percentage of Investment Funds Invested in International Securities		18.00%	26.00%
Pension Plan [Member] | MidAmerican Energy Company [Member] | Equity Funds [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	[7]		$ 69
Pension Plan [Member] | MidAmerican Energy Company [Member] | Equity Funds [Member] | Fair Value, Inputs, Level 1 [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	[7]		69
Pension Plan [Member] | MidAmerican Energy Company [Member] | Equity Funds [Member] | Fair Value, Inputs, Level 2 [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount			0
Pension Plan [Member] | MidAmerican Energy Company [Member] | Equity Funds [Member] | Fair Value, Inputs, Level 3 [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount			0
Pension Plan [Member] | MidAmerican Energy Company [Member] | Equity Funds [Member] | Fair Value Measured at Net Asset Value Per Share [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		$ 393	299	[7]
Pension Plan [Member] | PacifiCorp [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		1,064	1,036		$ 942
Pension Plan [Member] | PacifiCorp [Member] | Defined Benefit Plan, Assets Before Investment Funds, Partnership Interests And Real Estate Funds | Fair Value, Inputs, Level 1, 2 and 3 [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		389	616
Pension Plan [Member] | PacifiCorp [Member] | Defined Benefit Plan, Assets Before Investment Funds, Partnership Interests And Real Estate Funds | Fair Value, Inputs, Level 1 [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		105	446
Pension Plan [Member] | PacifiCorp [Member] | Defined Benefit Plan, Assets Before Investment Funds, Partnership Interests And Real Estate Funds | Fair Value, Inputs, Level 2 [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		284	170
Pension Plan [Member] | PacifiCorp [Member] | Defined Benefit Plan, Assets Before Investment Funds, Partnership Interests And Real Estate Funds | Fair Value, Inputs, Level 3 [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Pension Plan [Member] | PacifiCorp [Member] | Cash Equivalents [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		32	24
Pension Plan [Member] | PacifiCorp [Member] | Cash Equivalents [Member] | Fair Value, Inputs, Level 1 [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Pension Plan [Member] | PacifiCorp [Member] | Cash Equivalents [Member] | Fair Value, Inputs, Level 2 [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		32	24
Pension Plan [Member] | PacifiCorp [Member] | Cash Equivalents [Member] | Fair Value, Inputs, Level 3 [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Pension Plan [Member] | PacifiCorp [Member] | US Treasury Securities [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		14	21
Pension Plan [Member] | PacifiCorp [Member] | US Treasury Securities [Member] | Fair Value, Inputs, Level 1 [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		14	21
Pension Plan [Member] | PacifiCorp [Member] | US Treasury Securities [Member] | Fair Value, Inputs, Level 2 [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Pension Plan [Member] | PacifiCorp [Member] | US Treasury Securities [Member] | Fair Value, Inputs, Level 3 [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Pension Plan [Member] | PacifiCorp [Member] | Corporate Debt Securities [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		231	94
Pension Plan [Member] | PacifiCorp [Member] | Corporate Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Pension Plan [Member] | PacifiCorp [Member] | Corporate Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		231	94
Pension Plan [Member] | PacifiCorp [Member] | Corporate Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Pension Plan [Member] | PacifiCorp [Member] | Municipal Bonds [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		21	10
Pension Plan [Member] | PacifiCorp [Member] | Municipal Bonds [Member] | Fair Value, Inputs, Level 1 [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Pension Plan [Member] | PacifiCorp [Member] | Municipal Bonds [Member] | Fair Value, Inputs, Level 2 [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		21	10
Pension Plan [Member] | PacifiCorp [Member] | Municipal Bonds [Member] | Fair Value, Inputs, Level 3 [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Pension Plan [Member] | PacifiCorp [Member] | US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount			42
Pension Plan [Member] | PacifiCorp [Member] | US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount			0
Pension Plan [Member] | PacifiCorp [Member] | US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount			42
Pension Plan [Member] | PacifiCorp [Member] | US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount			0
Pension Plan [Member] | PacifiCorp [Member] | Domestic Equity Securities [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		91	355
Pension Plan [Member] | PacifiCorp [Member] | Domestic Equity Securities [Member] | Fair Value, Inputs, Level 1 [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		91	355
Pension Plan [Member] | PacifiCorp [Member] | Domestic Equity Securities [Member] | Fair Value, Inputs, Level 2 [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Pension Plan [Member] | PacifiCorp [Member] | Domestic Equity Securities [Member] | Fair Value, Inputs, Level 3 [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		$ 0	0
Pension Plan [Member] | PacifiCorp [Member] | Foreign Equity Securities [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount			15
Pension Plan [Member] | PacifiCorp [Member] | Foreign Equity Securities [Member] | Fair Value, Inputs, Level 1 [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount			15
Pension Plan [Member] | PacifiCorp [Member] | Foreign Equity Securities [Member] | Fair Value, Inputs, Level 2 [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount			0
Pension Plan [Member] | PacifiCorp [Member] | Foreign Equity Securities [Member] | Fair Value, Inputs, Level 3 [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount			$ 0
Pension Plan [Member] | PacifiCorp [Member] | Equity Funds [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Percentage of Investment Funds Comprised of Equity Securitites		78.00%	55.00%
Percentage of Investment Funds Comprised of Debt Securities		22.00%	45.00%
Percentage of Investment Funds Invested in United States Securities		74.00%	51.00%
Percentage of Investment Funds Invested in International Securities		26.00%	49.00%
Pension Plan [Member] | PacifiCorp [Member] | Equity Funds [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount			$ 55
Pension Plan [Member] | PacifiCorp [Member] | Equity Funds [Member] | Fair Value, Inputs, Level 1 [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount			55
Pension Plan [Member] | PacifiCorp [Member] | Equity Funds [Member] | Fair Value, Inputs, Level 2 [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount			0
Pension Plan [Member] | PacifiCorp [Member] | Equity Funds [Member] | Fair Value, Inputs, Level 3 [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount			0
Pension Plan [Member] | PacifiCorp [Member] | Equity Funds [Member] | Fair Value Measured at Net Asset Value Per Share [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	[4]	$ 587	$ 327
[1]	Refer to Note 15 for additional discussion regarding the three levels of the fair value hierarchy.
[2]	Investment funds are comprised of mutual funds and collective trust funds. These funds consist of equity and debt securities of approximately 40% and 60%, respectively, for 2020 and 58% and 42%, respectively, for 2019. Additionally, these funds are invested in United States and international securities of approximately 79% and 21%, respectively, for 2020 and 75% and 25%, respectively, for 2019.
[3]	Investment funds are comprised of mutual funds and collective trust funds. These funds consist of equity and debt securities of approximately 56% and 44%, respectively, for 2020 and 77% and 23%, respectively, for 2019. Additionally, these funds are invested in United States and international securities of approximately 56% and 44%, respectively, for 2020 and 42% and 58%, respectively, for 2019.
[4]	Investment funds are substantially comprised of mutual funds and collective trust funds. These funds consist of equity and debt securities of approximately 78% and 22%, respectively, for 2020 and 55% and 45%, respectively, for 2019, and are invested in United States and international securities of approximately 74% and 26%, respectively, for 2020 and 51% and 49%, respectively, for 2019.
[5]	Refer to Note 15 for additional discussion regarding the three levels of the fair value hierarchy.
[6]	Investment funds are comprised of mutual funds and collective trust funds. These funds consist of equity and debt securities of approximately 69% and 31%, respectively, for 2020 and 62% and 38%, respectively, for 2019. Additionally, these funds are invested in United States and international securities of approximately 79% and 21%, respectively, for 2020 and 66% and 34%, respectively, for 2019.
[7]	Investment funds are comprised of mutual funds and collective trust funds. These funds consist of equity and debt securities of approximately 65% and 35%, respectively, for 2020 and 69% and 31%, respectively, for 2019. Additionally, these funds are invested in United States and international securities of approximately 82% and 18%, respectively, for 2020 and 74% and 26%, respectively, for 2019.

Employee Benefit Plans - MEC _8

Employee Benefit Plans - MEC - Defined Contribution Plans (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
MidAmerican Energy Company [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Contribution Plan, Cost	$ 26	$ 23	$ 22

Employee Benefit Plans - MidAme

Employee Benefit Plans - MidAmerican Funding - Net Periodic Benefit Cost (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Pension Plan [Member] | MidAmerican Funding, LLC and Subsidiaries [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	$ 7	$ 4	$ 3
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	(10)	(11)	(21)
Other Postretirement Benefits Plan [Member] | MidAmerican Funding, LLC and Subsidiaries [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	$ (3)	$ (2)	$ (2)

Employee Benefit Plans - EEGH -

Employee Benefit Plans - EEGH - Defined Benefit Plans (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Defined Benefit Plan Disclosure [Line Items]
Distribution of net assets	$ 121,000,000	$ 22,000,000	$ 23,000,000
Eastern Energy Gas Holdings, LLC [Member]
Defined Benefit Plan Disclosure [Line Items]
Distribution of net assets	4,498,000,000	636,000,000	0
Eastern Energy Gas Holdings, LLC [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Contributions by Employer		0
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss)		129,000,000
Eastern Energy Gas Holdings, LLC [Member] | MidAmerican Energy Pension Plan [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Contributions by Employer	3,000,000
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	3,000,000
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year	19,000,000
Eastern Energy Gas Holdings, LLC [Member] | MidAmerican Energy Pension Plan and Welfare Plan [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Contributions by Employer	2,000,000
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	2,000,000
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year	12,000,000
Eastern Energy Gas Holdings, LLC [Member] | Dominion Energy Pension Plan [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Contributions by Employer	0
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	(14,000,000)	(8,000,000)	(35,000,000)
Eastern Energy Gas Holdings, LLC [Member] | Dominion Energy Retiree Health and Welfare Plan [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	$ (5,000,000)	(4,000,000)	(8,000,000)
Eastern Energy Gas Holdings, LLC [Member] | Discontinued Operations, Disposed of by Means Other than Sale [Member] | Dominion Energy Pension Plan [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)		(14,000,000)	(21,000,000)
Eastern Energy Gas Holdings, LLC [Member] | Discontinued Operations, Disposed of by Means Other than Sale [Member] | Dominion Energy Retiree Health and Welfare Plan [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)		$ (1,000,000)	$ (2,000,000)

Employee Benefit Plans - EEGH_2

Employee Benefit Plans - EEGH - Pension Remeasurement (Details) - Eastern Energy Gas Holdings, LLC [Member] - Pension Benefit Plan Associated With GT&S Transaction [Member] $ in Millions	3 Months Ended
	Sep. 30, 2020USD ($)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Increase (Decrease) For Remeasurement Due To Curtailment	$ 7
Defined Benefit Plan, Benefit Obligation, (Increase) Decrease For Remeasurement Due To Curtailment	$ 3
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	3.16%

Employee Benefit Plans - EEGH_3

Employee Benefit Plans - EEGH - Voluntary Retirement Program (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Jun. 30, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Benefit Obligation, Increase (Decrease) for Plan Amendment		$ 0	$ 0
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate		2.59%	3.24%	4.21%
Eastern Energy Gas Holdings, LLC [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	4.10%		3.63%
Eastern Energy Gas Holdings, LLC [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Increase (Decrease) Due To Plan Amendment	$ 29
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	4.05%		3.44%
Eastern Energy Gas Holdings, LLC [Member] | Voluntary Retirement Program [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Cost of Providing Special and Contractual Termination Benefits			$ 74
Defined Benefit Plan, Cost of Providing Special and Contractual Termination Benefits, Net of Tax			58
Defined Benefit Plan, Benefit Obligation, Increase (Decrease) for Plan Amendment	$ 32
Defined Benefit Plan, Plan Assets, Increase (Decrease) Due To Plan Amendment	146
Defined Benefit Plan, Accumulated Benefit Obligation, Increase (Decrease) for Plan Amendment	$ 8
Eastern Energy Gas Holdings, LLC [Member] | Voluntary Retirement Program [Member] | Operations And Maintenance Expense [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Cost of Providing Special and Contractual Termination Benefits			41
Eastern Energy Gas Holdings, LLC [Member] | Voluntary Retirement Program [Member] | Other Nonoperating Income (Expense) [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Cost of Providing Special and Contractual Termination Benefits			1
Eastern Energy Gas Holdings, LLC [Member] | Voluntary Retirement Program [Member] | Income (Loss) from Discontinued Operations, Net of Tax [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Cost of Providing Special and Contractual Termination Benefits			$ 32

Employee Benefit Plans - EEGH_4

Employee Benefit Plans - EEGH - Funded Status (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2020	Dec. 31, 2019	Jun. 30, 2019	Dec. 31, 2018
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	$ 742	$ 664
Employer contributions	3	2
Actual return on plan assets	40	122
Benefits paid	(49)	(55)
Ending balance	744	742	$ 664
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Beginning balance	673	672
Service cost	7	8	9
Interest cost	21	27	24
Actuarial loss	(61)	(12)
Settlement	0	0
Benefits paid	(49)	(55)
Ending balance	758	673	672
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Plan assets at fair value, end of year	744	742	664	$ 744	$ 742		$ 664
Less - Benefit obligation, end of year	673	673	672	758	673		$ 672
Defined Benefit Plan, Funded (Unfunded) Status of Plan				(14)	69
Assets for Plan Benefits, Defined Benefit Plan				$ 20	$ 76
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate				2.59%	3.24%		4.21%
Eastern Energy Gas Holdings, LLC [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Defined Benefit Plan, Accumulated Benefit Obligation					$ 279
Eastern Energy Gas Holdings, LLC [Member] | Pension Plan [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	686	1,656
Dominion Energy Gas Restructuring		(1,084)
Employer contributions		0
Actual return on plan assets		129
Benefits paid		(15)
Ending balance		686	1,656
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Beginning balance	295	730
Dominion Energy Gas Restructuring		(468)
Service cost		6
Interest cost		11
Actuarial loss		30
Settlement		1
Benefits paid		(15)
Ending balance		295	730
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Plan assets at fair value, end of year	686	686	1,656		686		$ 1,656
Less - Benefit obligation, end of year	295	295	730		295		730
Defined Benefit Plan, Funded (Unfunded) Status of Plan					391
Assets for Plan Benefits, Defined Benefit Plan					$ 391
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate					3.63%	4.10%
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Rate of Compensation Increase					4.64%
Eastern Energy Gas Holdings, LLC [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	227	311
Dominion Energy Gas Restructuring		(126)
Employer contributions		12
Actual return on plan assets		38
Benefits paid		(8)
Ending balance		227	311
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Beginning balance	121	256
Dominion Energy Gas Restructuring		(135)
Service cost		1
Interest cost		5
Actuarial loss		1
Settlement		1
Benefits paid		(8)
Ending balance		121	256
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Plan assets at fair value, end of year	227	227	311		$ 227		311
Less - Benefit obligation, end of year	$ 121	$ 121	$ 256		121		$ 256
Defined Benefit Plan, Funded (Unfunded) Status of Plan					106
Assets for Plan Benefits, Defined Benefit Plan					$ 106
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate					3.44%	4.05%

Employee Benefit Plans - EEGH_5

Employee Benefit Plans - EEGH - Plan Assets (Details) - Dominion Energy, Inc. [Member]	Dec. 31, 2020
Defined Benefit Plan, Equity Securities, US [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage	28.00%
Defined Benefit Plan, Equity Securities, Non-US [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage	18.00%
Fixed Income Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage	35.00%
Defined Benefit Plan, Real Estate [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage	3.00%
Defined Benefit Plan, Other Alternative Investments [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage	16.00%

Employee Benefit Plans - EEGH_6

Employee Benefit Plans - EEGH - Fair Value Measurements (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019		Dec. 31, 2018
Pension Plan [Member] | Eastern Energy Gas Holdings, LLC [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value, end of year		$ 686		$ 1,656
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value, end of year	$ 744	742		664
Other Postretirement Benefits Plan [Member] | Eastern Energy Gas Holdings, LLC [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value, end of year		227		311
Other Postretirement Benefits Plan [Member] | Defined Benefit Plan, Assets Before Investment Funds, Partnership Interests And Real Estate Funds | Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value, end of year	573	568
Other Postretirement Benefits Plan [Member] | Defined Benefit Plan, Assets Before Investment Funds, Partnership Interests And Real Estate Funds | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value, end of year	340	433
Other Postretirement Benefits Plan [Member] | Defined Benefit Plan, Assets Before Investment Funds, Partnership Interests And Real Estate Funds | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value, end of year	233	135
Other Postretirement Benefits Plan [Member] | Defined Benefit Plan, Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value, end of year	22	18
Other Postretirement Benefits Plan [Member] | Defined Benefit Plan, Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value, end of year	20	17	[1]
Other Postretirement Benefits Plan [Member] | Defined Benefit Plan, Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value, end of year	2	1	[1]
Other Postretirement Benefits Plan [Member] | US Treasury Securities [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value, end of year	15	23
Other Postretirement Benefits Plan [Member] | US Treasury Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value, end of year	15	23
Other Postretirement Benefits Plan [Member] | US Treasury Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value, end of year	0	0
Other Postretirement Benefits Plan [Member] | Corporate Debt Securities [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value, end of year	102	44
Other Postretirement Benefits Plan [Member] | Corporate Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value, end of year	0	0
Other Postretirement Benefits Plan [Member] | Corporate Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value, end of year	102	44
UNITED STATES | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value, end of year	2,824	2,656		$ 2,396
UNITED STATES | Pension Plan [Member] | Eastern Energy Gas Holdings, LLC [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value, end of year		688
UNITED STATES | Pension Plan [Member] | Fair Value Measured at Net Asset Value Per Share [Member] | Eastern Energy Gas Holdings, LLC [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value, end of year		238
UNITED STATES | Pension Plan [Member] | Defined Benefit Plan, Assets Before Investment Funds, Partnership Interests And Real Estate Funds | Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value, end of year	1,172	1,606
UNITED STATES | Pension Plan [Member] | Defined Benefit Plan, Assets Before Investment Funds, Partnership Interests And Real Estate Funds | Fair Value, Inputs, Level 1, 2 and 3 [Member] | Eastern Energy Gas Holdings, LLC [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value, end of year		450
UNITED STATES | Pension Plan [Member] | Defined Benefit Plan, Assets Before Investment Funds, Partnership Interests And Real Estate Funds | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value, end of year	276	1,045
UNITED STATES | Pension Plan [Member] | Defined Benefit Plan, Assets Before Investment Funds, Partnership Interests And Real Estate Funds | Fair Value, Inputs, Level 1 [Member] | Eastern Energy Gas Holdings, LLC [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value, end of year		297
UNITED STATES | Pension Plan [Member] | Defined Benefit Plan, Assets Before Investment Funds, Partnership Interests And Real Estate Funds | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value, end of year	896	561	[2]
UNITED STATES | Pension Plan [Member] | Defined Benefit Plan, Assets Before Investment Funds, Partnership Interests And Real Estate Funds | Fair Value, Inputs, Level 2 [Member] | Eastern Energy Gas Holdings, LLC [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value, end of year		153
UNITED STATES | Pension Plan [Member] | Defined Benefit Plan, Assets Before Investment Funds, Partnership Interests And Real Estate Funds | Fair Value, Inputs, Level 3 [Member] | Eastern Energy Gas Holdings, LLC [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value, end of year		0
UNITED STATES | Pension Plan [Member] | Defined Benefit Plan, Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value, end of year	79	63
UNITED STATES | Pension Plan [Member] | Defined Benefit Plan, Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member] | Eastern Energy Gas Holdings, LLC [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value, end of year		1
UNITED STATES | Pension Plan [Member] | Defined Benefit Plan, Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value, end of year	0	27
UNITED STATES | Pension Plan [Member] | Defined Benefit Plan, Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 1 [Member] | Eastern Energy Gas Holdings, LLC [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value, end of year		1
UNITED STATES | Pension Plan [Member] | Defined Benefit Plan, Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value, end of year	79	36
UNITED STATES | Pension Plan [Member] | Defined Benefit Plan, Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 2 [Member] | Eastern Energy Gas Holdings, LLC [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value, end of year		0
UNITED STATES | Pension Plan [Member] | Defined Benefit Plan, Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 3 [Member] | Eastern Energy Gas Holdings, LLC [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value, end of year		0
UNITED STATES | Pension Plan [Member] | US Treasury Securities [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value, end of year	52	210
UNITED STATES | Pension Plan [Member] | US Treasury Securities [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member] | Eastern Energy Gas Holdings, LLC [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value, end of year		61
UNITED STATES | Pension Plan [Member] | US Treasury Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value, end of year	52	210
UNITED STATES | Pension Plan [Member] | US Treasury Securities [Member] | Fair Value, Inputs, Level 1 [Member] | Eastern Energy Gas Holdings, LLC [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value, end of year		2
UNITED STATES | Pension Plan [Member] | US Treasury Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value, end of year	0	0	[2]
UNITED STATES | Pension Plan [Member] | US Treasury Securities [Member] | Fair Value, Inputs, Level 2 [Member] | Eastern Energy Gas Holdings, LLC [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value, end of year		59
UNITED STATES | Pension Plan [Member] | US Treasury Securities [Member] | Fair Value, Inputs, Level 3 [Member] | Eastern Energy Gas Holdings, LLC [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value, end of year		0
UNITED STATES | Pension Plan [Member] | Corporate Debt Securities [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value, end of year	748	376
UNITED STATES | Pension Plan [Member] | Corporate Debt Securities [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member] | Eastern Energy Gas Holdings, LLC [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value, end of year		69
UNITED STATES | Pension Plan [Member] | Corporate Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value, end of year	0	0	[2]
UNITED STATES | Pension Plan [Member] | Corporate Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member] | Eastern Energy Gas Holdings, LLC [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value, end of year		3
UNITED STATES | Pension Plan [Member] | Corporate Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value, end of year	$ 748	376	[2]
UNITED STATES | Pension Plan [Member] | Corporate Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member] | Eastern Energy Gas Holdings, LLC [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value, end of year		66
UNITED STATES | Pension Plan [Member] | Corporate Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member] | Eastern Energy Gas Holdings, LLC [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value, end of year		0
UNITED STATES | Pension Plan [Member] | Defined Benefit Plan, Insurance Contracts [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member] | Eastern Energy Gas Holdings, LLC [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value, end of year		28
UNITED STATES | Pension Plan [Member] | Defined Benefit Plan, Insurance Contracts [Member] | Fair Value, Inputs, Level 1 [Member] | Eastern Energy Gas Holdings, LLC [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value, end of year		0
UNITED STATES | Pension Plan [Member] | Defined Benefit Plan, Insurance Contracts [Member] | Fair Value, Inputs, Level 2 [Member] | Eastern Energy Gas Holdings, LLC [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value, end of year		28
UNITED STATES | Pension Plan [Member] | Defined Benefit Plan, Insurance Contracts [Member] | Fair Value, Inputs, Level 3 [Member] | Eastern Energy Gas Holdings, LLC [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value, end of year		0
UNITED STATES | Pension Plan [Member] | Defined Benefit Plan, Equity Securities, US [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member] | Eastern Energy Gas Holdings, LLC [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value, end of year		177
UNITED STATES | Pension Plan [Member] | Defined Benefit Plan, Equity Securities, US [Member] | Fair Value, Inputs, Level 1 [Member] | Eastern Energy Gas Holdings, LLC [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value, end of year		177
UNITED STATES | Pension Plan [Member] | Defined Benefit Plan, Equity Securities, US [Member] | Fair Value, Inputs, Level 2 [Member] | Eastern Energy Gas Holdings, LLC [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value, end of year		0
UNITED STATES | Pension Plan [Member] | Defined Benefit Plan, Equity Securities, US [Member] | Fair Value, Inputs, Level 3 [Member] | Eastern Energy Gas Holdings, LLC [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value, end of year		0
UNITED STATES | Pension Plan [Member] | Defined Benefit Plan, Equity Securities, Non-US [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member] | Eastern Energy Gas Holdings, LLC [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value, end of year		114
UNITED STATES | Pension Plan [Member] | Defined Benefit Plan, Equity Securities, Non-US [Member] | Fair Value, Inputs, Level 1 [Member] | Eastern Energy Gas Holdings, LLC [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value, end of year		114
UNITED STATES | Pension Plan [Member] | Defined Benefit Plan, Equity Securities, Non-US [Member] | Fair Value, Inputs, Level 2 [Member] | Eastern Energy Gas Holdings, LLC [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value, end of year		0
UNITED STATES | Pension Plan [Member] | Defined Benefit Plan, Equity Securities, Non-US [Member] | Fair Value, Inputs, Level 3 [Member] | Eastern Energy Gas Holdings, LLC [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value, end of year		0
UNITED STATES | Other Postretirement Benefits Plan [Member] | Eastern Energy Gas Holdings, LLC [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value, end of year		227
UNITED STATES | Other Postretirement Benefits Plan [Member] | Fair Value Measured at Net Asset Value Per Share [Member] | Eastern Energy Gas Holdings, LLC [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value, end of year		120
UNITED STATES | Other Postretirement Benefits Plan [Member] | Defined Benefit Plan, Assets Before Investment Funds, Partnership Interests And Real Estate Funds | Fair Value, Inputs, Level 1, 2 and 3 [Member] | Eastern Energy Gas Holdings, LLC [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value, end of year		107
UNITED STATES | Other Postretirement Benefits Plan [Member] | Defined Benefit Plan, Assets Before Investment Funds, Partnership Interests And Real Estate Funds | Fair Value, Inputs, Level 1 [Member] | Eastern Energy Gas Holdings, LLC [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value, end of year		107
UNITED STATES | Other Postretirement Benefits Plan [Member] | Defined Benefit Plan, Assets Before Investment Funds, Partnership Interests And Real Estate Funds | Fair Value, Inputs, Level 2 [Member] | Eastern Energy Gas Holdings, LLC [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value, end of year		0
UNITED STATES | Other Postretirement Benefits Plan [Member] | Defined Benefit Plan, Assets Before Investment Funds, Partnership Interests And Real Estate Funds | Fair Value, Inputs, Level 3 [Member] | Eastern Energy Gas Holdings, LLC [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value, end of year		0
UNITED STATES | Other Postretirement Benefits Plan [Member] | Defined Benefit Plan, Equity Securities, US [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member] | Eastern Energy Gas Holdings, LLC [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value, end of year		86
UNITED STATES | Other Postretirement Benefits Plan [Member] | Defined Benefit Plan, Equity Securities, US [Member] | Fair Value, Inputs, Level 1 [Member] | Eastern Energy Gas Holdings, LLC [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value, end of year		86
UNITED STATES | Other Postretirement Benefits Plan [Member] | Defined Benefit Plan, Equity Securities, US [Member] | Fair Value, Inputs, Level 2 [Member] | Eastern Energy Gas Holdings, LLC [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value, end of year		0
UNITED STATES | Other Postretirement Benefits Plan [Member] | Defined Benefit Plan, Equity Securities, US [Member] | Fair Value, Inputs, Level 3 [Member] | Eastern Energy Gas Holdings, LLC [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value, end of year		0
UNITED STATES | Other Postretirement Benefits Plan [Member] | Defined Benefit Plan, Equity Securities, Non-US [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member] | Eastern Energy Gas Holdings, LLC [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value, end of year		21
UNITED STATES | Other Postretirement Benefits Plan [Member] | Defined Benefit Plan, Equity Securities, Non-US [Member] | Fair Value, Inputs, Level 1 [Member] | Eastern Energy Gas Holdings, LLC [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value, end of year		21
UNITED STATES | Other Postretirement Benefits Plan [Member] | Defined Benefit Plan, Equity Securities, Non-US [Member] | Fair Value, Inputs, Level 2 [Member] | Eastern Energy Gas Holdings, LLC [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value, end of year		0
UNITED STATES | Other Postretirement Benefits Plan [Member] | Defined Benefit Plan, Equity Securities, Non-US [Member] | Fair Value, Inputs, Level 3 [Member] | Eastern Energy Gas Holdings, LLC [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value, end of year		$ 0
[1]	Refer to Note 15 for additional discussion regarding the three levels of the fair value hierarchy.
[2]	Refer to Note 15 for additional discussion regarding the three levels of the fair value hierarchy.

Employee Benefit Plans - EEGH_7

Employee Benefit Plans - EEGH - Net Periodic Benefit Cost (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Pension Plan [Member] | Eastern Energy Gas Holdings, LLC [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost		$ 6
Interest cost		11
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 7	8	$ 9
Interest cost	21	27	24
Expected return on plan assets	(34)	(40)	(41)
Net amortization	4	6	13
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	(10)	(11)	(21)
Other Postretirement Benefits Plan [Member] | Eastern Energy Gas Holdings, LLC [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost		1
Interest cost		5
UNITED STATES | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	17	16	21
Interest cost	93	111	105
Expected return on plan assets	(140)	(154)	(164)
Net amortization	32	31	28
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	2	4	11
UNITED STATES | Pension Plan [Member] | Eastern Energy Gas Holdings, LLC [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	5	6	18
Interest cost	8	11	29
Expected return on plan assets	(47)	(54)	(150)
Settlement	0	1	0
Net amortization	5	7	19
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	(29)	(29)	(84)
UNITED STATES | Other Postretirement Benefits Plan [Member] | Eastern Energy Gas Holdings, LLC [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	1	1	4
Interest cost	4	5	11
Expected return on plan assets	(16)	(16)	(28)
Settlement	0	1	0
Net amortization	(3)	(2)	(1)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	$ (14)	$ (11)	$ (14)

Employee Benefit Plans - EEGH_8

Employee Benefit Plans - EEGH - Plan Assumptions (Details)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Jun. 30, 2019
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Health Care Cost Trend Rate Assumed, Next Fiscal Year	6.30%	6.50%
Defined Benefit Plan, Ultimate Health Care Cost Trend Rate	5.00%	5.00%
Pension Plan [Member] | Eastern Energy Gas Holdings, LLC [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate		3.63%		4.10%
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	2.59%	3.24%	4.21%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets	5.42%	6.39%	6.44%
Other Postretirement Benefits Plan [Member] | Eastern Energy Gas Holdings, LLC [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate		3.44%		4.05%
UNITED STATES | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	2.60%	3.32%	4.25%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets	5.94%	6.48%	6.36%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase	2.75%	2.75%	2.75%
UNITED STATES | Pension Plan [Member] | Eastern Energy Gas Holdings, LLC [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate			3.81%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets	8.60%	8.65%	8.75%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase	4.73%	4.55%	4.11%
UNITED STATES | Pension Plan [Member] | Eastern Energy Gas Holdings, LLC [Member] | Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	3.16%	4.10%
UNITED STATES | Pension Plan [Member] | Eastern Energy Gas Holdings, LLC [Member] | Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	3.63%	4.42%
UNITED STATES | Other Postretirement Benefits Plan [Member] | Eastern Energy Gas Holdings, LLC [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	3.44%		3.81%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets	8.50%	8.50%	8.50%
Defined Benefit Plan, Health Care Cost Trend Rate Assumed, Next Fiscal Year	6.50%	6.50%	7.00%
Defined Benefit Plan, Ultimate Health Care Cost Trend Rate	5.00%	5.00%	5.00%
UNITED STATES | Other Postretirement Benefits Plan [Member] | Eastern Energy Gas Holdings, LLC [Member] | Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate		4.05%
UNITED STATES | Other Postretirement Benefits Plan [Member] | Eastern Energy Gas Holdings, LLC [Member] | Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate		4.37%

Employee Benefit Plans - EEGH_9

Employee Benefit Plans - EEGH - Unrecognized Amounts (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2018
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Before Tax	$ 549	$ 618
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Net loss	(23)	34
Prior service cost (credit)	(14)	(9)
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Before Tax	(31)	28	$ 35
UNITED STATES | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Net loss	653	612
Prior service cost (credit)	(2)	(1)
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Before Tax	652	$ 613	$ 746
UNITED STATES | Pension Plan [Member] | Eastern Energy Gas Holdings, LLC [Member]
Defined Benefit Plan Disclosure [Line Items]
Net loss	150
Prior service cost (credit)	0
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Before Tax	150
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, after Tax	147
UNITED STATES | Other Postretirement Benefits Plan [Member] | Eastern Energy Gas Holdings, LLC [Member]
Defined Benefit Plan Disclosure [Line Items]
Net loss	44
Prior service cost (credit)	(49)
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Before Tax	(5)
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, after Tax	$ (5)

Employee Benefit Plans - EEG_10

Employee Benefit Plans - EEGH - Defined Contribution Plans (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Eastern Energy Gas Holdings, LLC [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Contribution Plan, Cost	$ 4	$ 4	$ 8

Retirement Plan and Postretir_3

Retirement Plan and Postretirement Benefits - NPC (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Employee Benefit Plans [Text Block]	Employee Benefit Plans Defined Benefit Plans Domestic Operations PacifiCorp, MidAmerican Energy and NV Energy sponsor defined benefit pension plans that cover a majority of all employees of BHE and its domestic energy subsidiaries. These pension plans include noncontributory defined benefit pension plans, supplemental executive retirement plans ("SERP") and restoration plans. PacifiCorp, MidAmerican Energy and NV Energy also provide certain postretirement healthcare and life insurance benefits through various plans to eligible retirees. On November 1, 2020, BHE completed its acquisition of substantially all of the natural gas transmission and storage business of DEI and Dominion Questar, exclusive of the Questar Pipeline Group (the "GT&S Transaction"). Defined benefit pension and postretirement benefits provided to the employees of BHE GT&S, which were part of the GT&S Transaction completed on November 1, 2020, are administered in the respective plans sponsored by MidAmerican Energy. Initial pension and postretirement plan liabilities of $81 million and $37 million, respectively, resulted from the GT&S Transaction. Net Periodic Benefit Cost For purposes of calculating the expected return on plan assets, a market-related value is used. The market-related value of plan assets is generally calculated by spreading the difference between expected and actual investment returns over a five-year period beginning after the first year in which they occur. Net periodic benefit cost for the plans included the following components for the years ended December 31 (in millions): Pension Other Postretirement 2020 2019 2018 2020 2019 2018 Service cost $ 17 $ 16 $ 21 $ 7 $ 8 $ 9 Interest cost 93 111 105 21 27 24 Expected return on plan assets (140) (154) (164) (34) (40) (41) Settlement — — 21 — — — Net amortization 32 31 28 (4) (6) (13) Net periodic benefit cost (credit) $ 2 $ 4 $ 11 $ (10) $ (11) $ (21) Funded Status The following table is a reconciliation of the fair value of plan assets for the years ended December 31 (in millions): Pension Other Postretirement 2020 2019 2020 2019 Plan assets at fair value, beginning of year $ 2,656 $ 2,396 $ 742 $ 664 Employer contributions 13 12 3 2 Participant contributions — — 8 9 Actual return on plan assets 373 456 40 122 Settlement — (22) — — Benefits paid (218) (186) (49) (55) Plan assets at fair value, end of year $ 2,824 $ 2,656 $ 744 $ 742 The following table is a reconciliation of the benefit obligations for the years ended December 31 (in millions): Pension Other Postretirement 2020 2019 2020 2019 Benefit obligation, beginning of year $ 2,878 $ 2,718 $ 673 $ 672 Service cost 17 16 7 8 Interest cost 93 111 21 27 Participant contributions — — 8 9 Actuarial loss 226 242 61 12 Amendment — (1) — — Settlement — (22) — — Acquisition 81 — 37 — Benefits paid (218) (186) (49) (55) Benefit obligation, end of year $ 3,077 $ 2,878 $ 758 $ 673 Accumulated benefit obligation, end of year $ 2,999 $ 2,867 The funded status of the plans and the amounts recognized on the Consolidated Balance Sheets as of December 31 are as follows (in millions): Pension Other Postretirement 2020 2019 2020 2019 Plan assets at fair value, end of year $ 2,824 $ 2,656 $ 744 $ 742 Benefit obligation, end of year 3,077 2,878 758 673 Funded status $ (253) $ (222) $ (14) $ 69 Amounts recognized on the Consolidated Balance Sheets: Other assets $ 43 $ 73 $ 20 $ 76 Other current liabilities (13) (13) — — Other long-term liabilities (283) (282) (34) (7) Amounts recognized $ (253) $ (222) $ (14) $ 69 The SERPs and restoration plan have no plan assets; however, the Company has Rabbi trusts that hold corporate-owned life insurance and other investments to provide funding for the future cash requirements of the SERPs and restoration plan. The cash surrender value of all of the policies included in the Rabbi trusts, net of amounts borrowed against the cash surrender value, plus the fair market value of other Rabbi trust investments, was $303 million and $252 million as of December 31, 2020 and 2019, respectively. These assets are not included in the plan assets in the above table, but are reflected in noncurrent investments and restricted cash and investments on the Consolidated Balance Sheets. The fair value of plan assets, projected benefit obligation and accumulated benefit obligation for (1) pension and other postretirement benefit plans with a projected benefit obligation in excess of the fair value of plan assets and (2) pension plans with an accumulated benefit obligation in excess of the fair value of plan assets as of December 31 are as follows (in millions): Pension Other Postretirement 2020 2019 2020 2019 Fair value of plan assets $ 1,782 $ 1,939 $ 417 $ 439 Projected benefit obligation $ 2,069 $ 2,227 $ 451 $ 446 Fair value of plan assets $ 1,064 $ 1,939 Accumulated benefit obligation $ 1,341 $ 2,222 Unrecognized Amounts The portion of the funded status of the plans not yet recognized in net periodic benefit cost as of December 31 is as follows (in millions): Pension Other Postretirement 2020 2019 2020 2019 Net loss (gain) $ 612 $ 653 $ 34 $ (23) Prior service credit (1) (2) (9) (14) Regulatory deferrals 2 1 3 6 Total $ 613 $ 652 $ 28 $ (31) A reconciliation of the amounts not yet recognized as components of net periodic benefit cost for the years ended December 31, 2020 and 2019 is as follows (in millions): Accumulated Other Regulatory Regulatory Comprehensive Asset Liability Loss Total Pension Balance, December 31, 2018 $ 730 $ — $ 16 $ 746 Net (gain) loss arising during the year (38) (33) 10 (61) Net prior service credit arising during the year — — (2) (2) Net amortization (31) — — (31) Total (69) (33) 8 (94) Balance, December 31, 2019 661 (33) 24 652 Net (gain) loss arising during the year (30) 13 10 (7) Net amortization (31) — (1) (32) Total (61) 13 9 (39) Balance, December 31, 2020 $ 600 $ (20) $ 33 $ 613 Accumulated Other Regulatory Regulatory Comprehensive Asset Liability Loss Total Other Postretirement Balance, December 31, 2018 $ 44 $ (10) $ 1 $ 35 Net gain arising during the year (45) (23) (4) (72) Net amortization 5 1 — 6 Total (40) (22) (4) (66) Balance, December 31, 2019 4 (32) (3) (31) Net loss arising during the year 36 12 7 55 Net amortization 7 (3) — 4 Total 43 9 7 59 Balance, December 31, 2020 $ 47 $ (23) $ 4 $ 28 Plan Assumptions Weighted-average assumptions used to determine benefit obligations and net periodic benefit cost were as follows: Pension Other Postretirement 2020 2019 2018 2020 2019 2018 Benefit obligations as of December 31: Discount rate 2.60 % 3.32 % 4.25 % 2.59 % 3.24 % 4.21 % Rate of compensation increase 2.75 % 2.75 % 2.75 % NA NA NA Interest crediting rates for cash balance plan 2018 NA NA 3.38 % NA NA NA 2019 NA 3.22 % 3.54 % NA NA NA 2020 2.44 % 2.94 % 3.54 % NA NA NA 2021 2.25 % 2.94 % 3.56 % NA NA NA 2022 2.25 % 3.02 % 3.56 % NA NA NA 2023 2.65 % 3.02 % 3.56 % NA NA NA Net periodic benefit cost for the years ended December 31: Discount rate 3.32 % 4.25 % 3.60 % 3.24 % 4.21 % 3.57 % Expected return on plan assets 5.94 % 6.48 % 6.36 % 5.42 % 6.39 % 6.44 % Rate of compensation increase 2.75 % 2.75 % 2.75 % NA NA NA Interest crediting rate for cash balance plan 2.44 % 3.22 % 3.38 % NA NA NA In establishing its assumption as to the expected return on plan assets, the Company utilizes the asset allocation and return assumptions for each asset class based on historical performance and forward-looking views of the financial markets. 2020 2019 Assumed healthcare cost trend rates as of December 31: Healthcare cost trend rate assumed for next year 6.30 % 6.50 % Rate that the cost trend rate gradually declines to 5.00 % 5.00 % Year that the rate reaches the rate it is assumed to remain at 2025 2025 Contributions and Benefit Payments Employer contributions to the pension and other postretirement benefit plans are expected to be $13 million and $14 million, respectively, during 2021. Funding to the established pension trusts is based upon the actuarially determined costs of the plans and the requirements of the IRC, the Employee Retirement Income Security Act of 1974 and the Pension Protection Act of 2006, as amended. The Company considers contributing additional amounts from time to time in order to achieve certain funding levels specified under the Pension Protection Act of 2006, as amended. The Company evaluates a variety of factors, including funded status, income tax laws and regulatory requirements, in determining contributions to its other postretirement benefit plans. The expected benefit payments to participants in the Company's pension and other postretirement benefit plans for 2021 through 2025 and for the five years thereafter are summarized below (in millions): Projected Benefit Payments Other Pension Postretirement 2021 $ 236 $ 53 2022 219 54 2023 220 54 2024 211 54 2025 206 52 2026-2030 926 238 Plan Assets Investment Policy and Asset Allocations The Company's investment policy for its pension and other postretirement benefit plans is to balance risk and return through a diversified portfolio of debt securities, equity securities and other alternative investments. Maturities for debt securities are managed to targets consistent with prudent risk tolerances. The plans retain outside investment advisors to manage plan investments within the parameters outlined by the Berkshire Hathaway Energy Company Investment Committee. The investment portfolio is managed in line with the investment policy with sufficient liquidity to meet near-term benefit payments. The target allocations (percentage of plan assets) for the Company's pension and other postretirement benefit plan assets are as follows as of December 31, 2020: Other Pension Postretirement % % PacifiCorp: Debt securities (1) 25-35 75-83 Equity securities (1) 53-68 16-24 Limited partnership interests 7-12 1-3 MidAmerican Energy: Debt securities (1) 50-80 60-70 Equity securities (1) 20-50 30-40 Real estate funds 0-5 — Other 0-5 0-5 NV Energy: Debt securities (1) 60-75 60-70 Equity securities (1) 25-40 30-40 (1) For purposes of target allocation percentages and consistent with the plans' investment policy, investment funds are allocated based on the underlying investments in debt and equity securities. Fair Value Measurements The following table presents the fair value of plan assets, by major category, for the Company's defined benefit pension plans (in millions): Input Levels for Fair Value Measurements (1) Level 1 Level 2 Total As of December 31, 2020: Cash equivalents $ — $ 79 $ 79 Debt securities: United States government obligations 52 — 52 Corporate obligations — 748 748 Municipal obligations — 69 69 Equity securities: United States companies 224 — 224 Total assets in the fair value hierarchy $ 276 $ 896 1,172 Investment funds (2) measured at net asset value 1,521 Limited partnership interests (3) measured at net asset value 88 Real estate funds measured at net asset value 43 Total assets measured at fair value $ 2,824 As of December 31, 2019: Cash equivalents $ 27 $ 36 $ 63 Debt securities: United States government obligations 210 — 210 International government obligations — 5 5 Corporate obligations — 376 376 Municipal obligations — 28 28 Agency, asset and mortgage-backed obligations — 115 115 Equity securities: United States companies 547 1 548 International companies 136 — 136 Investment funds (2) 125 — 125 Total assets in the fair value hierarchy $ 1,045 $ 561 1,606 Investment funds (2) measured at net asset value 915 Limited partnership interests (3) measured at net asset value 93 Real estate funds measured at net asset value 42 Total assets measured at fair value $ 2,656 (1) Refer to Note 15 for additional discussion regarding the three levels of the fair value hierarchy. (2) Investment funds are comprised of mutual funds and collective trust funds. These funds consist of equity and debt securities of approximately 69% and 31%, respectively, for 2020 and 62% and 38%, respectively, for 2019. Additionally, these funds are invested in United States and international securities of approximately 79% and 21%, respectively, for 2020 and 66% and 34%, respectively, for 2019. (3) Limited partnership interests include several funds that invest primarily in real estate, buyout, growth equity and venture capital. The following table presents the fair value of plan assets, by major category, for the Company's defined benefit other postretirement plans (in millions): Input Levels for Fair Value Measurements (1) Level 1 Level 2 Total As of December 31, 2020: Cash equivalents $ 20 $ 2 $ 22 Debt securities: United States government obligations 15 — 15 Corporate obligations — 102 102 Municipal obligations — 82 82 Agency, asset and mortgage-backed obligations — 47 47 Equity securities: United States companies 6 — 6 Investment funds (2) 299 — 299 Total assets in the fair value hierarchy $ 340 $ 233 573 Investment funds (2) measured at net asset value 167 Limited partnership interests (3) measured at net asset value 4 Total assets measured at fair value $ 744 As of December 31, 2019: Cash equivalents $ 17 $ 1 $ 18 Debt securities: United States government obligations 23 — 23 Corporate obligations — 44 44 Municipal obligations — 57 57 Agency, asset and mortgage-backed obligations — 33 33 Equity securities: United States companies 151 — 151 International companies 6 — 6 Investment funds (2) 236 — 236 Total assets in the fair value hierarchy $ 433 $ 135 568 Investment funds (2) measured at net asset value 169 Limited partnership interests (3) measured at net asset value 5 Total assets measured at fair value $ 742 (1) Refer to Note 15 for additional discussion regarding the three levels of the fair value hierarchy. (2) Investment funds are comprised of mutual funds and collective trust funds. These funds consist of equity and debt securities of approximately 40% and 60%, respectively, for 2020 and 58% and 42%, respectively, for 2019. Additionally, these funds are invested in United States and international securities of approximately 79% and 21%, respectively, for 2020 and 75% and 25%, respectively, for 2019. (3) Limited partnership interests include several funds that invest primarily in real estate, buyout, growth equity and venture capital. For level 1 investments, a readily observable quoted market price or net asset value of an identical security in an active market is used to record the fair value. For level 2 investments, the fair value is determined using pricing models based on observable market inputs. Shares of mutual funds not registered under the Securities Act of 1933, private equity limited partnership interests, common and commingled trust funds and investment entities are reported at fair value based on the net asset value per unit, which is used for expedience purposes. A fund's net asset value is based on the fair value of the underlying assets held by the fund less its liabilities. Foreign Operations Certain wholly-owned subsidiaries of Northern Powergrid participate in the Northern Powergrid group of the United Kingdom industry-wide Electricity Supply Pension Scheme (the "UK Plan"), which provides pension and other related defined benefits, based on final pensionable pay, to the employees of Northern Powergrid. The UK Plan is closed to employees hired after July 23, 1997. Employees hired after that date are covered by a defined contribution plan sponsored by a wholly-owned subsidiary of Northern Powergrid. Net Periodic Benefit Cost For purposes of calculating the expected return on pension plan assets, a market-related value is used. The market-related value of plan assets is calculated by including the difference between expected and actual investment returns after the first year in which they occur. Net periodic benefit cost for the UK Plan included the following components for the years ended December 31 (in millions): 2020 2019 2018 Service cost $ 16 $ 16 $ 19 Interest cost 40 49 56 Expected return on plan assets (101) (100) (101) Settlement 17 26 44 Net amortization 43 46 45 Net periodic benefit cost $ 15 $ 37 $ 63 Funded Status The following table is a reconciliation of the fair value of plan assets for the years ended December 31 (in millions): 2020 2019 Plan assets at fair value, beginning of year $ 2,151 $ 1,989 Employer contributions 56 56 Participant contributions 1 1 Actual return on plan assets 181 194 Settlement (63) (99) Benefits paid (67) (71) Foreign currency exchange rate changes 75 81 Plan assets at fair value, end of year $ 2,334 $ 2,151 The following table is a reconciliation of the benefit obligation for the years ended December 31 (in millions): 2020 2019 Benefit obligation, beginning of year $ 2,019 $ 1,833 Service cost 16 16 Interest cost 40 49 Participant contributions 1 1 Actuarial loss 188 175 Settlement (63) (99) Benefits paid (67) (71) Foreign currency exchange rate changes 71 115 Benefit obligation, end of year $ 2,205 $ 2,019 Accumulated benefit obligation, end of year $ 1,963 $ 1,786 The funded status of the UK Plan and the amounts recognized on the Consolidated Balance Sheets as of December 31 are as follows (in millions): 2020 2019 Plan assets at fair value, end of year $ 2,334 $ 2,151 Benefit obligation, end of year 2,205 2,019 Funded status $ 129 $ 132 Amounts recognized on the Consolidated Balance Sheets: Other assets $ 129 $ 132 Unrecognized Amounts The portion of the funded status of the UK Plan not yet recognized in net periodic benefit cost as of December 31 is as follows (in millions): 2020 2019 Net loss $ 612 $ 543 Prior service cost 6 6 Total $ 618 $ 549 A reconciliation of the amounts not yet recognized as components of net periodic benefit cost, which are included in accumulated other comprehensive loss on the Consolidated Balance Sheets, for the years ended December 31 is as follows (in millions): 2020 2019 Balance, beginning of year $ 549 $ 480 Net loss arising during the year 108 81 Settlement (17) (26) Net amortization (43) (46) Foreign currency exchange rate changes 21 60 Total 69 69 Balance, end of year $ 618 $ 549 Plan Assumptions Assumptions used to determine benefit obligations and net periodic benefit cost were as follows: 2020 2019 2018 Benefit obligations as of December 31: Discount rate 1.40 % 2.10 % 2.90 % Rate of compensation increase 3.05 % 3.30 % 3.55 % Rate of future price inflation 2.55 % 2.80 % 3.05 % Net periodic benefit cost for the years ended December 31: Discount rate 2.10 % 2.90 % 2.60 % Expected return on plan assets 5.00 % 5.10 % 4.90 % Rate of compensation increase 3.30 % 3.55 % 3.45 % Rate of future price inflation 2.80 % 3.05 % 2.95 % Contributions and Benefit Payments Employer contributions to the UK Plan are expected to be £50 million during 2021. The expected benefit payments to participants in the UK Plan for 2021 through 2025 and for the five years thereafter, excluding lump sum settlement elections and using the foreign currency exchange rate as of December 31, 2020, are summarized below (in millions): 2021 $ 74 2022 75 2023 77 2024 79 2025 81 2026-2030 431 Plan Assets Investment Policy and Asset Allocations The investment policy for the UK Plan is to balance risk and return through a diversified portfolio of debt securities, equity securities, real estate and other asset classes. Maturities for debt securities are managed to targets consistent with prudent risk tolerances. The UK Plan retains outside investment advisors to manage plan investments within the parameters set by the trustees of the UK Plan in consultation with Northern Powergrid. The investment portfolio is managed in line with the investment policy with sufficient liquidity to meet near-term benefit payments. The return on assets assumption is based on a weighted-average of the expected historical performance for the types of assets in which the UK Plan invests. The target allocations (percentage of plan assets) for the UK Plan assets are as follows as of December 31, 2020: % Debt securities (1) 60-70 Equity securities (1) 10-20 Real estate funds and other 15-25 (1) For purposes of target allocation percentages and consistent with the plans' investment policy, investment funds have been allocated based on the underlying investments in debt and equity securities. Fair Value Measurements The following table presents the fair value of the UK Plan assets, by major category (in millions): Input Levels for Fair Value Measurements (1) Level 1 Level 2 Level 3 Total As of December 31, 2020: Cash equivalents $ 5 $ 49 $ — $ 54 Debt securities: United Kingdom government obligations 1,102 — — 1,102 Equity securities: Investment funds (2) — 833 — 833 Real estate funds — — 237 237 Total $ 1,107 $ 882 $ 237 2,226 Investment funds (2) measured at net asset value 108 Total assets measured at fair value $ 2,334 As of December 31, 2019: Cash equivalents $ 3 $ 24 $ — $ 27 Debt securities: United Kingdom government obligations 960 — — 960 Equity securities: Investment funds (2) — 818 — 818 Real estate funds — — 243 243 Total $ 963 $ 842 $ 243 2,048 Investment funds (2) measured at net asset value 103 Total assets measured at fair value $ 2,151 (1) Refer to Note 15 for additional discussion regarding the three levels of the fair value hierarchy. (2) Investment funds are comprised of mutual funds and collective trust funds. These funds consist of equity and debt securities of approximately 40% and 60%, respectively, for 2020 and 38% and 62%, respectively, for 2019. The fair value of the UK Plan's assets are determined similar to the plan assets of the domestic plans as previously discussed. The following table reconciles the beginning and ending balances of the UK Plan assets measured at fair value using significant Level 3 inputs for the years ended December 31 (in millions): Real Estate Funds 2020 2019 2018 Beginning balance $ 243 $ 239 $ 230 Actual return on plan assets still held at period end (13) (5) 23 Foreign currency exchange rate changes 7 9 (14) Ending balance $ 237 $ 243 $ 239 Defined Contribution Plans The Company sponsors various defined contribution plans covering substantially all employees. The Company's contributions vary depending on the plan, but matching contributions are based on each participant's level of contribution, and certain participants receive contributions based on eligible pre-tax annual compensation. Contributions cannot exceed the maximum allowable for tax purposes. The Company's contributions to these plans were $127 million, $115 million and $112 million for the years ended December 31, 2020, 2019 and 2018, respectively.
Other Postretirement Benefits Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Plan Assets, Contributions by Employer	$ 3	$ 2
Assets for Plan Benefits, Defined Benefit Plan	20	76
Liability, Defined Benefit Plan, Noncurrent	(34)	(7)
Other current liabilities	0	0
UNITED STATES | Pension Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Plan Assets, Contributions by Employer	13	12
Assets for Plan Benefits, Defined Benefit Plan	43	73
Liability, Defined Benefit Plan, Noncurrent	(283)	(282)
Other current liabilities	$ (13)	(13)
Nevada Power Company [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Employee Benefit Plans [Text Block]	Employee Benefit Plans Nevada Power is a participant in benefit plans sponsored by NV Energy. The NV Energy Retirement Plan includes a qualified pension plan ("Qualified Pension Plan") and a supplemental executive retirement plan and a restoration plan (collectively, "Non‑Qualified Pension Plans") that provide pension benefits for eligible employees. The NV Energy Comprehensive Welfare Benefit and Cafeteria Plan provides certain postretirement health care and life insurance benefits for eligible retirees ("Other Postretirement Plans") on behalf of Nevada Power. Nevada Power did not make any contributions to the Qualified Pension Plan for the years ended December 31, 2020 and 2019. Nevada Power contributed $19 million to the Qualified Pension Plan for the year ended December 31, 2018. Nevada Power contributed $1 million to the Non-Qualified Pension Plans for the years ended December 31, 2020, 2019 and 2018. Nevada Power did not make any contributions to the Other Postretirement Plans for the years ended December 31, 2020, 2019 and 2018. Amounts attributable to Nevada Power were allocated from NV Energy based upon the current, or in the case of retirees, previous, employment location. Offsetting regulatory assets and liabilities have been recorded related to the amounts not yet recognized as a component of net periodic benefit costs that will be included in regulated rates. Net periodic benefit costs not included in regulated rates are included in accumulated other comprehensive loss, net. Amounts receivable from (payable to) NV Energy are included on the Consolidated Balance Sheets and consist of the following as of December 31 (in millions): 2020 2019 Qualified Pension Plan: Other non-current assets $ 8 $ — Other long-term liabilities — (18) Non-Qualified Pension Plans: Other current liabilities (1) (1) Other long-term liabilities (9) (9) Other Postretirement Plans: Other non-current assets 4 — Other long-term liabilities — (2)
Nevada Power Company [Member] | UNITED STATES | Other Postretirement Benefits Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Plan Assets, Contributions by Employer	$ 0	0	$ 0
Nevada Power Company [Member] | UNITED STATES | NV Energy, Inc. [Member] | Other Noncurrent Assets [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Assets for Plan Benefits, Defined Benefit Plan	4	0
Nevada Power Company [Member] | UNITED STATES | NV Energy, Inc. [Member] | Other Noncurrent Liabilities [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Liability, Defined Benefit Plan, Noncurrent	0	(2)
Nevada Power Company [Member] | Qualified Plan [Member] | UNITED STATES | Pension Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Plan Assets, Contributions by Employer	0	0	19
Nevada Power Company [Member] | Qualified Plan [Member] | UNITED STATES | NV Energy, Inc. [Member] | Other Noncurrent Assets [Member] | Pension Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Assets for Plan Benefits, Defined Benefit Plan	8	0
Nevada Power Company [Member] | Qualified Plan [Member] | UNITED STATES | NV Energy, Inc. [Member] | Other Noncurrent Liabilities [Member] | Pension Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Liability, Defined Benefit Plan, Noncurrent	0	(18)
Nevada Power Company [Member] | Nonqualified Plan [Member] | UNITED STATES | Other Pension Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Plan Assets, Contributions by Employer	1	1	$ 1
Nevada Power Company [Member] | Nonqualified Plan [Member] | UNITED STATES | NV Energy, Inc. [Member] | Other Current Liabilities [Member] | Other Pension Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Other current liabilities	(1)	(1)
Nevada Power Company [Member] | Nonqualified Plan [Member] | UNITED STATES | NV Energy, Inc. [Member] | Other Noncurrent Liabilities [Member] | Other Pension Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Liability, Defined Benefit Plan, Noncurrent	$ (9)	$ (9)

Retirement Plan and Postretir_4

Retirement Plan and Postretirement Benefits - SPPC (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Other Postretirement Benefits Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Plan Assets, Contributions by Employer	$ 3	$ 2
Assets for Plan Benefits, Defined Benefit Plan	20	76
Liability, Defined Benefit Plan, Noncurrent	(34)	(7)
Other current liabilities	0	0
UNITED STATES | Pension Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Plan Assets, Contributions by Employer	13	12
Assets for Plan Benefits, Defined Benefit Plan	43	73
Liability, Defined Benefit Plan, Noncurrent	(283)	(282)
Other current liabilities	(13)	(13)
Sierra Pacific Power Company [Member] | UNITED STATES | Other Postretirement Benefits Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Plan Assets, Contributions by Employer	0	0	$ 6
Sierra Pacific Power Company [Member] | UNITED STATES | Other Noncurrent Liabilities [Member] | NV Energy, Inc. [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Liability, Defined Benefit Plan, Noncurrent	(13)	(7)
Sierra Pacific Power Company [Member] | Qualified Plan [Member] | UNITED STATES | Pension Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Plan Assets, Contributions by Employer	0	0	6
Sierra Pacific Power Company [Member] | Qualified Plan [Member] | UNITED STATES | Other Noncurrent Assets [Member] | NV Energy, Inc. [Member] | Pension Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Assets for Plan Benefits, Defined Benefit Plan	26	0
Sierra Pacific Power Company [Member] | Qualified Plan [Member] | UNITED STATES | Other Noncurrent Liabilities [Member] | NV Energy, Inc. [Member] | Pension Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Liability, Defined Benefit Plan, Noncurrent	0	(4)
Sierra Pacific Power Company [Member] | Nonqualified Plan [Member] | UNITED STATES | Other Pension Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Plan Assets, Contributions by Employer	1	1	$ 1
Sierra Pacific Power Company [Member] | Nonqualified Plan [Member] | UNITED STATES | Other Noncurrent Liabilities [Member] | NV Energy, Inc. [Member] | Other Pension Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Liability, Defined Benefit Plan, Noncurrent	(8)	(8)
Sierra Pacific Power Company [Member] | Nonqualified Plan [Member] | UNITED STATES | Other Current Liabilities [Member] | NV Energy, Inc. [Member] | Other Pension Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Other current liabilities	$ (1)	$ (1)

Asset Retirement Obligations -

Asset Retirement Obligations - Asset Retirement Obligation By Type (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Asset Retirement Obligations By Type [Line Items]
Asset Retirement Obligation, Revision of Estimate		$ 46	$ 257
Asset Retirement Obligation		1,341	1,272	$ 985
Regulatory Liabilities		7,475	7,311
Fossil Fuel Plant [Member]
Asset Retirement Obligations By Type [Line Items]
Asset Retirement Obligation		529	623
Quad Cities Station [Member]
Asset Retirement Obligations By Type [Line Items]
Asset Retirement Obligation		376	358
Wind Generating Facility [Member]
Asset Retirement Obligations By Type [Line Items]
Asset Retirement Obligation		273	211
Offshore pipeline facilities [Member]
Asset Retirement Obligations By Type [Line Items]
Asset Retirement Obligation		16	15
Solar Generating Facility [Member]
Asset Retirement Obligations By Type [Line Items]
Asset Retirement Obligation		24	21
Other Plant in Service [Member]
Asset Retirement Obligations By Type [Line Items]
Asset Retirement Obligation		123	44
Cost of removal
Asset Retirement Obligations By Type [Line Items]
Regulatory Liabilities	[1]	2,435	2,370
Quad Cities Station nuclear decommissioning trust funds [Member]
Asset Retirement Obligations By Type [Line Items]
Nuclear decommissioning trust funds		676	599
MidAmerican Energy Company and Subsidiaries [Member]
Asset Retirement Obligations By Type [Line Items]
Asset Retirement Obligation, Revision of Estimate		47	234
Asset Retirement Obligation		818	839	$ 562
MidAmerican Energy Company and Subsidiaries [Member] | Fossil Fuel Plant [Member]
Asset Retirement Obligations By Type [Line Items]
Asset Retirement Obligation, Revision of Estimate			237
Asset Retirement Obligation		255	325
MidAmerican Energy Company and Subsidiaries [Member] | Quad Cities Station [Member]
Asset Retirement Obligations By Type [Line Items]
Asset Retirement Obligation		376	358
MidAmerican Energy Company and Subsidiaries [Member] | Wind Generating Facility [Member]
Asset Retirement Obligations By Type [Line Items]
Asset Retirement Obligation		185	154
MidAmerican Energy Company and Subsidiaries [Member] | Other Plant in Service [Member]
Asset Retirement Obligations By Type [Line Items]
Asset Retirement Obligation		2	2
MidAmerican Energy Company and Subsidiaries [Member] | Cost of removal
Asset Retirement Obligations By Type [Line Items]
Regulatory Liabilities		466	572
MidAmerican Energy Company and Subsidiaries [Member] | Quad Cities Station nuclear decommissioning trust funds [Member]
Asset Retirement Obligations By Type [Line Items]
Nuclear decommissioning trust funds		$ 676	$ 599
[1]	Amounts represent estimated costs, as accrued through depreciation rates and exclusive of ARO liabilities, of removing regulated property, plant and equipment in accordance with accepted regulatory practices. Amounts are deducted from rate base or otherwise accrue a carrying cost.

Asset Retirement Obligations _2

Asset Retirement Obligations - Change in Asset Retirement Obligations (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Beginning Balance	$ 1,272	$ 985
Asset Retirement Obligation, Revision of Estimate	46	257
Asset Retirement Obligation, Acquisition Related Increase	(122)	0
Asset Retirement Obligation, Liabilities Incurred	51	43
Retirements	(201)	(61)
Charge related to a voluntary retirement program	51	48
Asset Retirement Obligation	1,341	1,272	$ 1,341	$ 1,272
Asset Retirement Obligation, Current			184	167
Asset Retirement Obligations, Noncurrent			$ 1,157	$ 1,105
Ending Balance	$ 1,341	$ 1,272

Asset Retirement Obligations _3

Asset Retirement Obligations - PacifiCorp - Asset Retirement Obligations By Type (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Asset Retirement Obligations By Type [Line Items]
Regulatory Liability, Noncurrent	$ 7,221	$ 7,100
PacifiCorp [Member]
Asset Retirement Obligations By Type [Line Items]
Regulatory Liability, Noncurrent	2,727	2,913
PacifiCorp [Member] | Cost of removal
Asset Retirement Obligations By Type [Line Items]
Regulatory Liability, Noncurrent	$ 1,125	$ 1,019

Asset Retirement Obligations _4

Asset Retirement Obligations - PacifiCorp - Change in Asset Retirement Obligations (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Beginning Balance	$ 1,272	$ 985
Asset Retirement Obligation, Revision of Estimate	46	257
Asset Retirement Obligation, Liabilities Incurred	51	43
Retirements	(201)	(61)
Charge related to a voluntary retirement program	51	48
Asset Retirement Obligation, Current	184	167
Asset Retirement Obligations, Noncurrent	1,157	1,105
Ending Balance	1,341	1,272
PacifiCorp [Member]
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Beginning Balance	257	227
Asset Retirement Obligation, Revision of Estimate	(11)	27
Asset Retirement Obligation, Liabilities Incurred	25	9
Retirements	(10)	(15)
Charge related to a voluntary retirement program	9	9
Asset Retirement Obligation, Current	13	19
Asset Retirement Obligations, Noncurrent	257	238
Ending Balance	$ 270	$ 257

Asset Retirement Obligations _5

Asset Retirement Obligations - MEC - Asset Retirement Obligations By Type (Details) - USD ($) $ in Millions		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Asset Retirement Obligations By Type [Line Items]
Asset Retirement Obligation		$ 1,341	$ 1,272	$ 985
Regulatory Liabilities		7,475	7,311
Quad Cities Unit Nos 1 and 2 [Member]
Asset Retirement Obligations By Type [Line Items]
Asset Retirement Obligation		376	358
Fossil Fuel Plant [Member]
Asset Retirement Obligations By Type [Line Items]
Asset Retirement Obligation		529	623
Wind Generating Facility [Member]
Asset Retirement Obligations By Type [Line Items]
Asset Retirement Obligation		273	211
Other Plant in Service [Member]
Asset Retirement Obligations By Type [Line Items]
Asset Retirement Obligation		123	44
MidAmerican Energy Company [Member]
Asset Retirement Obligations By Type [Line Items]
Asset Retirement Obligation		818	839	$ 562
MidAmerican Energy Company [Member] | Quad Cities Unit Nos 1 and 2 [Member]
Asset Retirement Obligations By Type [Line Items]
Asset Retirement Obligation		376	358
MidAmerican Energy Company [Member] | Fossil Fuel Plant [Member]
Asset Retirement Obligations By Type [Line Items]
Asset Retirement Obligation		255	325
MidAmerican Energy Company [Member] | Wind Generating Facility [Member]
Asset Retirement Obligations By Type [Line Items]
Asset Retirement Obligation		185	154
MidAmerican Energy Company [Member] | Other Plant in Service [Member]
Asset Retirement Obligations By Type [Line Items]
Asset Retirement Obligation		2	2
Quad Cities Unit Nos 1 and 2 [Member] | MidAmerican Energy Company [Member]
Asset Retirement Obligations By Type [Line Items]
Decommissioning Fund Investments, Fair Value	[1]	676	599
Cost of removal
Asset Retirement Obligations By Type [Line Items]
Regulatory Liabilities	[2]	2,435	2,370
Cost of removal | MidAmerican Energy Company [Member]
Asset Retirement Obligations By Type [Line Items]
Regulatory Liabilities		$ 466	$ 572
[1]	Refer to Note 6 for a discussion of the Quad Cities Station nuclear decommissioning trust funds.
[2]	Amounts represent estimated costs, as accrued through depreciation rates and exclusive of ARO liabilities, of removing regulated property, plant and equipment in accordance with accepted regulatory practices. Amounts are deducted from rate base or otherwise accrue a carrying cost.

Asset Retirement Obligations _6

Asset Retirement Obligations - MEC - Change in Asset Retirement Obligations (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Beginning Balance	$ 1,272	$ 985
Asset Retirement Obligation, Revision of Estimate	46	257
Asset Retirement Obligation, Liabilities Incurred	51	43
Asset Retirement Obligation, Liabilities Settled	(201)	(61)
Charge related to a voluntary retirement program	51	48
Asset Retirement Obligation, Current	184	167
Asset Retirement Obligations, Noncurrent	1,157	1,105
Ending Balance	1,341	1,272
MidAmerican Energy Company [Member]
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Beginning Balance	839	562
Asset Retirement Obligation, Revision of Estimate	47	234
Asset Retirement Obligation, Liabilities Incurred	23	27
Asset Retirement Obligation, Liabilities Settled	(124)	(14)
Charge related to a voluntary retirement program	33	30
Asset Retirement Obligation, Current	109	135
Asset Retirement Obligations, Noncurrent	709	704
Ending Balance	818	839
Fossil Fuel Plant [Member]
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Beginning Balance	623
Ending Balance	529	623
Fossil Fuel Plant [Member] | MidAmerican Energy Company [Member]
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Beginning Balance	325
Asset Retirement Obligation, Revision of Estimate		237
Ending Balance	$ 255	$ 325

Asset Retirement Obligations _7

Asset Retirement Obligations - NPC - Asset Retirement Obligation by Type (Details) - USD ($) $ in Millions		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Asset Retirement Obligations By Type [Line Items]
Regulatory Liabilities		$ 7,475	$ 7,311
Asset Retirement Obligation		1,341	1,272	$ 985
Other Plant in Service [Member]
Asset Retirement Obligations By Type [Line Items]
Asset Retirement Obligation		123	44
Cost of removal
Asset Retirement Obligations By Type [Line Items]
Regulatory Liabilities	[1]	2,435	2,370
Nevada Power Company [Member]
Asset Retirement Obligations By Type [Line Items]
Regulatory Liabilities		1,213	1,256
Asset Retirement Obligation		72	74	$ 83
Nevada Power Company [Member] | Waste water remediation [Member]
Asset Retirement Obligations By Type [Line Items]
Asset Retirement Obligation		36	37
Nevada Power Company [Member] | Evaporative Ponds and Dry Ash Landfills [Member]
Asset Retirement Obligations By Type [Line Items]
Asset Retirement Obligation		13	12
Nevada Power Company [Member] | Solar [Member]
Asset Retirement Obligations By Type [Line Items]
Asset Retirement Obligation		3	2
Nevada Power Company [Member] | Other Plant in Service [Member]
Asset Retirement Obligations By Type [Line Items]
Asset Retirement Obligation		20	23
Nevada Power Company [Member] | Cost of removal
Asset Retirement Obligations By Type [Line Items]
Regulatory Liabilities	[2]	$ 340	$ 332
[1]	Amounts represent estimated costs, as accrued through depreciation rates and exclusive of ARO liabilities, of removing regulated property, plant and equipment in accordance with accepted regulatory practices. Amounts are deducted from rate base or otherwise accrue a carrying cost.
[2]	Amounts represent estimated costs, as accrued through depreciation rates and exclusive of ARO liabilities, of removing regulated property, plant and equipment in accordance with accepted regulatory practices.

Asset Retirement Obligations _8

Asset Retirement Obligations - NPC - Change in Asset Retirement Obligations (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Beginning Balance	$ 1,272	$ 985
Asset Retirement Obligation, Revision of Estimate	46	257
Retirements	(201)	(61)
Charge related to a voluntary retirement program	51	48
Ending Balance	1,341	1,272
Asset Retirement Obligation, Current	184	167
Asset Retirement Obligations, Noncurrent	1,157	1,105
Nevada Power Company [Member]
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Beginning Balance	74	83
Asset Retirement Obligation, Revision of Estimate	9	6
Retirements	(14)	(19)
Charge related to a voluntary retirement program	3	4
Ending Balance	72	74
Asset Retirement Obligation, Current	25	14
Asset Retirement Obligations, Noncurrent	$ 47	$ 60

Asset Retirement Obligations _9

Asset Retirement Obligations - SPPC - Asset Retirement Obligation by Type (Details) - USD ($) $ in Millions		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Asset Retirement Obligations By Type [Line Items]
Regulatory liabilities		$ 7,475	$ 7,311
Asset Retirement Obligation		1,341	1,272	$ 985
Other Plant in Service [Member]
Asset Retirement Obligations By Type [Line Items]
Asset Retirement Obligation		123	44
Cost of removal
Asset Retirement Obligations By Type [Line Items]
Regulatory liabilities	[1]	2,435	2,370
Sierra Pacific Power Company [Member]
Asset Retirement Obligations By Type [Line Items]
Regulatory liabilities		497	538
Asset Retirement Obligation		11	10	$ 10
Sierra Pacific Power Company [Member] | Asbestos [Member]
Asset Retirement Obligations By Type [Line Items]
Asset Retirement Obligation		5	5
Sierra Pacific Power Company [Member] | Evaporative Ponds and Dry Ash Landfills [Member]
Asset Retirement Obligations By Type [Line Items]
Asset Retirement Obligation		3	2
Sierra Pacific Power Company [Member] | Other Plant in Service [Member]
Asset Retirement Obligations By Type [Line Items]
Asset Retirement Obligation		3	3
Sierra Pacific Power Company [Member] | Cost of removal
Asset Retirement Obligations By Type [Line Items]
Regulatory liabilities	[2]	$ 197	$ 217
[1]	Amounts represent estimated costs, as accrued through depreciation rates and exclusive of ARO liabilities, of removing regulated property, plant and equipment in accordance with accepted regulatory practices. Amounts are deducted from rate base or otherwise accrue a carrying cost.
[2]	Amounts represent estimated costs, as accrued through depreciation rates and exclusive of ARO liabilities, of removing regulated property, plant and equipment in accordance with accepted regulatory practices.

Asset Retirement Obligations_10

Asset Retirement Obligations - SPPC - Change in Asset Retirement Obligations (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Beginning Balance	$ 1,272	$ 985
Charge related to a voluntary retirement program	51	48
Ending Balance	1,341	1,272
Sierra Pacific Power Company [Member]
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Beginning Balance	10	10
Charge related to a voluntary retirement program	1	0
Ending Balance	$ 11	$ 10

Asset Retirement Obligations_11

Asset Retirement Obligations - EEGH - Asset Retirement Obligation by Type (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Asset Retirement Obligations By Type [Line Items]
Regulatory Liability, Noncurrent	$ 7,221	$ 7,100
Eastern Energy Gas Holdings, LLC [Member]
Asset Retirement Obligations By Type [Line Items]
Regulatory Liability, Noncurrent	669	800
Cost of removal | Eastern Energy Gas Holdings, LLC [Member]
Asset Retirement Obligations By Type [Line Items]
Regulatory Liability, Noncurrent	$ 88	$ 73

Asset Retirement Obligations_12

Asset Retirement Obligations - EEGH - Change in Asset Retirement Obligations (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Beginning Balance	$ 1,272	$ 985
Change in estimated costs	46	257
Additions	51	43
Retirements	(201)	(61)
Charge related to a voluntary retirement program	51	48
Other current liabilities	184	167
Other long-term liabilities	1,157	1,105
Ending Balance	1,341	1,272
Eastern Energy Gas Holdings, LLC [Member]
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Beginning Balance	89	88
Change in estimated costs	(51)	0
Additions	48	0
Retirements	(3)	(3)
Disposal of Questar Pipeline Group	(16)	0
Charge related to a voluntary retirement program	4	4
Other current liabilities	36	14
Other long-term liabilities	35	75
Ending Balance	$ 71	$ 89

Commitments and Contingencies -

Commitments and Contingencies - Legal (Details) a in Millions, $ in Millions	1 Months Ended	4 Months Ended
	Sep. 30, 2020anaturalGasProducer	Dec. 31, 2020USD ($)naturalGasProducer	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)
Loss Contingencies [Line Items]
Property, plant and equipment, net		$ 86,128	$ 73,305	$ 68,087
Equity method investments		7,067	3,947
PacifiCorp [Member]
Loss Contingencies [Line Items]
Property, plant and equipment, net		22,430	$ 20,973	$ 19,570
PacifiCorp [Member] | 2020 Wildfires
Loss Contingencies [Line Items]
Number of Acres Burned | a	0.5
Number of Structures Destroyed | naturalGasProducer	2,000
Loss Contingency, Estimate of Possible Loss		136
Fire Suppression Costs		$ 150
PacifiCorp [Member] | 2020 Wildfires | Pending Litigation
Loss Contingencies [Line Items]
Number of Pending Lawsuits | naturalGasProducer		5

Commitments and Contingencies_3

Commitments and Contingencies - Commitments Table (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Contractual Obligation [Line Items]
Purchase Obligation, Due in Next Twelve Months	$ 563
Contractual Obligation, Due in Next Twelve Months	3,390
Contractual Obligation, Due in Second Year	2,371
Contractual Obligation, Due in Third Year	1,842
Contractual Obligation, Due in Fourth Year	1,615
Contractual Obligation, Due in Fifth Year	1,330
Contractual Obligation, Due after Fifth Year	16,653
Contractual Obligation	27,201
MidAmerican Funding [Member]
Contractual Obligation [Line Items]
Coal transportation costs, railroad	90	$ 123	$ 111
Fuel, capacity and transmission contract commitments [Member]
Contractual Obligation [Line Items]
Purchase Obligation, Due in Next Twelve Months	2,122
Purchase Obligation, Due in Second Year	1,559
Purchase Obligation, Due in Third Year	1,307
Purchase Obligation, Due in Fourth Year	1,285
Purchase Obligation, Due in Fifth Year	1,047
Purchase Obligation, Due after Fifth Year	12,985
Purchase Obligation	20,305
Capital Addition Purchase Commitments [Member]
Contractual Obligation [Line Items]
Purchase Obligation, Due in Next Twelve Months	783
Purchase Obligation, Due in Second Year	372
Purchase Obligation, Due in Third Year	148
Purchase Obligation, Due in Fourth Year	0
Purchase Obligation, Due in Fifth Year	0
Purchase Obligation, Due after Fifth Year	4
Purchase Obligation	1,307
Easements [Member]
Contractual Obligation [Line Items]
Purchase Obligation, Due in Next Twelve Months	72
Purchase Obligation, Due in Second Year	74
Purchase Obligation, Due in Third Year	74
Purchase Obligation, Due in Fourth Year	73
Purchase Obligation, Due in Fifth Year	73
Purchase Obligation, Due after Fifth Year	2,229
Purchase Obligation	2,595
Maintenance, service and other contracts [Member]
Contractual Obligation [Line Items]
Purchase Obligation, Due in Next Twelve Months	413
Purchase Obligation, Due in Second Year	366
Purchase Obligation, Due in Third Year	313
Purchase Obligation, Due in Fourth Year	257
Purchase Obligation, Due in Fifth Year	210
Purchase Obligation, Due after Fifth Year	1,435
Purchase Obligation	2,994
MidAmerican Energy Company and Subsidiaries [Member]
Contractual Obligation [Line Items]
Contractual Obligation, Due in Next Twelve Months	872
Contractual Obligation, Due in Second Year	637
Contractual Obligation, Due in Third Year	304
Contractual Obligation, Due in Fourth Year	194
Contractual Obligation, Due in Fifth Year	155
Contractual Obligation, Due after Fifth Year	1,952
Contractual Obligation	4,114
MidAmerican Energy Company and Subsidiaries [Member] | Capital Addition Purchase Commitments [Member]
Contractual Obligation [Line Items]
Purchase Obligation, Due in Next Twelve Months	442
Purchase Obligation, Due in Second Year	287
Purchase Obligation, Due in Third Year	2
Purchase Obligation, Due in Fourth Year	0
Purchase Obligation, Due in Fifth Year	0
Purchase Obligation, Due after Fifth Year	4
Purchase Obligation	735
MidAmerican Energy Company and Subsidiaries [Member] | Easements [Member]
Contractual Obligation [Line Items]
Purchase Obligation, Due in Next Twelve Months	38
Purchase Obligation, Due in Second Year	39
Purchase Obligation, Due in Third Year	40
Purchase Obligation, Due in Fourth Year	41
Purchase Obligation, Due in Fifth Year	41
Purchase Obligation, Due after Fifth Year	1,542
Purchase Obligation	1,741
MidAmerican Energy Company and Subsidiaries [Member] | Maintenance, service and other contracts [Member]
Contractual Obligation [Line Items]
Purchase Obligation, Due in Next Twelve Months	156
Purchase Obligation, Due in Second Year	159
Purchase Obligation, Due in Third Year	159
Purchase Obligation, Due in Fourth Year	123
Purchase Obligation, Due in Fifth Year	92
Purchase Obligation, Due after Fifth Year	358
Purchase Obligation	$ 1,047

Commitments and Contingencies _

Commitments and Contingencies – Hydroelectric (Details) - PacifiCorp [Member] $ in Millions	12 Months Ended
	Dec. 31, 2020USD ($)
Hydroelectric [Line Items]
Capital expenditures required by hydroelectric licenses	$ 182
Klamath Hydroelectric System [Member]
Hydroelectric [Line Items]
Dam removal cost limit	200
Additional dam removal costs, California bond measure	250
Additional Contingency Funding	45
Hydroelectric Dam Removal Cost Funding	450
Klamath Relicensing and Settlement Costs	$ 21

Commitments and Contingencies_4

Commitments and Contingencies - PacifiCorp - Legal (Details) - PacifiCorp [Member] - 2020 Wildfires a in Millions, $ in Millions	1 Months Ended	4 Months Ended
	Sep. 30, 2020anaturalGasProducer	Dec. 31, 2020USD ($)naturalGasProducer
Loss Contingencies [Line Items]
Loss Contingency, Estimate of Possible Loss | $		$ 136
Fire Suppression Costs | $		$ 150
Number of Acres Burned | a	0.5
Number of Structures Destroyed | naturalGasProducer	2,000
Pending Litigation
Loss Contingencies [Line Items]
Number of Pending Lawsuits | naturalGasProducer		5

Commitments and Contingencies_5

Commitments and Contingencies - PacifiCorp - Hydroelectric (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Hydroelectric [Line Items]
Assets	$ 127,316	$ 100,051	$ 92,189

Commitments and Contingencies_6

Commitments and Contingencies - PacifiCorp - Commitments Tables (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Contractual Obligation [Line Items]
Purchase Obligation, Due in Next Twelve Months	$ 563
Contractual Obligation, Due in Next Twelve Months	3,390
Contractual Obligation, Due in Second Year	2,371
Contractual Obligation, Due in Third Year	1,842
Contractual Obligation, Due in Fourth Year	1,615
Contractual Obligation, Due in Fifth Year	1,330
Contractual Obligation, Due after Fifth Year	16,653
Contractual Obligation	27,201
Capital Addition Purchase Commitments [Member]
Contractual Obligation [Line Items]
Purchase Obligation, Due in Next Twelve Months	783
Purchase Obligation, Due in Second Year	372
Purchase Obligation, Due in Third Year	148
Purchase Obligation, Due in Fourth Year	0
Purchase Obligation, Due in Fifth Year	0
Purchase Obligation, Due after Fifth Year	4
Purchase Obligation	1,307
Easements [Member]
Contractual Obligation [Line Items]
Purchase Obligation, Due in Next Twelve Months	72
Purchase Obligation, Due in Second Year	74
Purchase Obligation, Due in Third Year	74
Purchase Obligation, Due in Fourth Year	73
Purchase Obligation, Due in Fifth Year	73
Purchase Obligation, Due after Fifth Year	2,229
Purchase Obligation	2,595
Maintenance, service and other contracts [Member]
Contractual Obligation [Line Items]
Purchase Obligation, Due in Next Twelve Months	413
Purchase Obligation, Due in Second Year	366
Purchase Obligation, Due in Third Year	313
Purchase Obligation, Due in Fourth Year	257
Purchase Obligation, Due in Fifth Year	210
Purchase Obligation, Due after Fifth Year	1,435
Purchase Obligation	2,994
PacifiCorp [Member]
Contractual Obligation [Line Items]
Contractual Obligation, Due in Next Twelve Months	1,192
Contractual Obligation, Due in Second Year	832
Contractual Obligation, Due in Third Year	731
Contractual Obligation, Due in Fourth Year	660
Contractual Obligation, Due in Fifth Year	435
Contractual Obligation, Due after Fifth Year	3,996
Contractual Obligation	$ 7,846
Maximum percentage of energy sources for which a share of operating costs and debt service is required	5.00%	5.00%	5.00%
PacifiCorp [Member] | Purchased electricity contracts - commercially operable
Contractual Obligation [Line Items]
Purchase Obligation, Due in Next Twelve Months	$ 223
Purchase Obligation, Due in Second Year	201
Purchase Obligation, Due in Third Year	195
Purchase Obligation, Due in Fourth Year	192
Purchase Obligation, Due in Fifth Year	172
Purchase Obligation, Due after Fifth Year	2,028
Purchase Obligation	3,011
PacifiCorp [Member] | Purchased electricity contracts - not commercially operable
Contractual Obligation [Line Items]
Purchase Obligation, Due in Next Twelve Months	25
Purchase Obligation, Due in Second Year	25
Purchase Obligation, Due in Third Year	25
Purchase Obligation, Due in Fourth Year	26
Purchase Obligation, Due in Fifth Year	28
Purchase Obligation, Due after Fifth Year	456
Purchase Obligation	585
PacifiCorp [Member] | Fuel contracts
Contractual Obligation [Line Items]
Purchase Obligation, Due in Next Twelve Months	636
Purchase Obligation, Due in Second Year	426
Purchase Obligation, Due in Third Year	368
Purchase Obligation, Due in Fourth Year	320
Purchase Obligation, Due in Fifth Year	137
Purchase Obligation, Due after Fifth Year	611
Purchase Obligation	2,498
PacifiCorp [Member] | Capital Addition Purchase Commitments [Member]
Contractual Obligation [Line Items]
Purchase Obligation, Due in Next Twelve Months	90
Purchase Obligation, Due in Second Year	0
Purchase Obligation, Due in Third Year	0
Purchase Obligation, Due in Fourth Year	0
Purchase Obligation, Due in Fifth Year	0
Purchase Obligation, Due after Fifth Year	0
Purchase Obligation	90
PacifiCorp [Member] | Transmission
Contractual Obligation [Line Items]
Purchase Obligation, Due in Next Twelve Months	104
Purchase Obligation, Due in Second Year	97
Purchase Obligation, Due in Third Year	90
Purchase Obligation, Due in Fourth Year	74
Purchase Obligation, Due in Fifth Year	49
Purchase Obligation, Due after Fifth Year	409
Purchase Obligation	823
PacifiCorp [Member] | Easements [Member]
Contractual Obligation [Line Items]
Purchase Obligation, Due in Next Twelve Months	14
Purchase Obligation, Due in Second Year	14
Purchase Obligation, Due in Third Year	13
Purchase Obligation, Due in Fourth Year	13
Purchase Obligation, Due in Fifth Year	13
Purchase Obligation, Due after Fifth Year	278
Purchase Obligation	345
PacifiCorp [Member] | Maintenance, service and other contracts [Member]
Contractual Obligation [Line Items]
Purchase Obligation, Due in Next Twelve Months	100
Purchase Obligation, Due in Second Year	69
Purchase Obligation, Due in Third Year	40
Purchase Obligation, Due in Fourth Year	35
Purchase Obligation, Due in Fifth Year	36
Purchase Obligation, Due after Fifth Year	214
Purchase Obligation	$ 494

Commitments and Contingencies_7

Commitments and Contingencies - MEC - Commitments Table (Details) $ in Millions	Dec. 31, 2020USD ($)
Contractual Obligation [Line Items]
Purchase Obligation, Due in Next Twelve Months	$ 563
Contractual Obligation, Due in Next Twelve Months	3,390
Contractual Obligation, Due in Second Year	2,371
Contractual Obligation, Due in Third Year	1,842
Contractual Obligation, Due in Fourth Year	1,615
Contractual Obligation, Due in Fifth Year	1,330
Contractual Obligation, Due after Fifth Year	16,653
Contractual Obligation	27,201
Capital Addition Purchase Commitments [Member]
Contractual Obligation [Line Items]
Purchase Obligation, Due in Next Twelve Months	783
Purchase Obligation, Due in Second Year	372
Purchase Obligation, Due in Third Year	148
Purchase Obligation, Due in Fourth Year	0
Purchase Obligation, Due in Fifth Year	0
Purchase Obligation, Due after Fifth Year	4
Purchase Obligation	1,307
Easements [Member]
Contractual Obligation [Line Items]
Purchase Obligation, Due in Next Twelve Months	72
Purchase Obligation, Due in Second Year	74
Purchase Obligation, Due in Third Year	74
Purchase Obligation, Due in Fourth Year	73
Purchase Obligation, Due in Fifth Year	73
Purchase Obligation, Due after Fifth Year	2,229
Purchase Obligation	2,595
Maintenance, service and other contracts [Member]
Contractual Obligation [Line Items]
Purchase Obligation, Due in Next Twelve Months	413
Purchase Obligation, Due in Second Year	366
Purchase Obligation, Due in Third Year	313
Purchase Obligation, Due in Fourth Year	257
Purchase Obligation, Due in Fifth Year	210
Purchase Obligation, Due after Fifth Year	1,435
Purchase Obligation	2,994
MidAmerican Energy Company [Member]
Contractual Obligation [Line Items]
Contractual Obligation, Due in Next Twelve Months	872
Contractual Obligation, Due in Second Year	637
Contractual Obligation, Due in Third Year	304
Contractual Obligation, Due in Fourth Year	194
Contractual Obligation, Due in Fifth Year	155
Contractual Obligation, Due after Fifth Year	1,952
Contractual Obligation	4,114
MidAmerican Energy Company [Member] | Fuel contracts
Contractual Obligation [Line Items]
Purchase Obligation, Due in Next Twelve Months	86
Purchase Obligation, Due in Second Year	55
Purchase Obligation, Due in Third Year	43
Purchase Obligation, Due in Fourth Year	0
Purchase Obligation, Due in Fifth Year	0
Purchase Obligation, Due after Fifth Year	0
Purchase Obligation	184
MidAmerican Energy Company [Member] | Electric capacity and transmission
Contractual Obligation [Line Items]
Purchase Obligation, Due in Next Twelve Months	29
Purchase Obligation, Due in Second Year	18
Purchase Obligation, Due in Third Year	9
Purchase Obligation, Due in Fourth Year	9
Purchase Obligation, Due in Fifth Year	9
Purchase Obligation, Due after Fifth Year	25
Purchase Obligation	99
MidAmerican Energy Company [Member] | Natural gas contracts for gas operations
Contractual Obligation [Line Items]
Purchase Obligation, Due in Next Twelve Months	121
Purchase Obligation, Due in Second Year	79
Purchase Obligation, Due in Third Year	51
Purchase Obligation, Due in Fourth Year	21
Purchase Obligation, Due in Fifth Year	13
Purchase Obligation, Due after Fifth Year	23
Purchase Obligation	308
MidAmerican Energy Company [Member] | Capital Addition Purchase Commitments [Member]
Contractual Obligation [Line Items]
Purchase Obligation, Due in Next Twelve Months	442
Purchase Obligation, Due in Second Year	287
Purchase Obligation, Due in Third Year	2
Purchase Obligation, Due in Fourth Year	0
Purchase Obligation, Due in Fifth Year	0
Purchase Obligation, Due after Fifth Year	4
Purchase Obligation	735
MidAmerican Energy Company [Member] | Easements [Member]
Contractual Obligation [Line Items]
Purchase Obligation, Due in Next Twelve Months	38
Purchase Obligation, Due in Second Year	39
Purchase Obligation, Due in Third Year	40
Purchase Obligation, Due in Fourth Year	41
Purchase Obligation, Due in Fifth Year	41
Purchase Obligation, Due after Fifth Year	1,542
Purchase Obligation	1,741
MidAmerican Energy Company [Member] | Maintenance, service and other contracts [Member]
Contractual Obligation [Line Items]
Purchase Obligation, Due in Next Twelve Months	156
Purchase Obligation, Due in Second Year	159
Purchase Obligation, Due in Third Year	159
Purchase Obligation, Due in Fourth Year	123
Purchase Obligation, Due in Fifth Year	92
Purchase Obligation, Due after Fifth Year	358
Purchase Obligation	$ 1,047

Commitments and Contingencies_8

Commitments and Contingencies - MEC - Transmission Rates (Details) - MidAmerican Energy Company [Member] $ in Millions	12 Months Ended
	Dec. 31, 2020USD ($)
Unfavorable Regulatory Action [Member]
Loss Contingencies [Line Items]
Loss Contingency Accrual	$ 9
Electric Transmission [Member]
Loss Contingencies [Line Items]
Public Utilities, Approved Return on Equity Adder, Percentage	0.50%
Electric Transmission [Member] | Prior to September 2016 [Member]
Loss Contingencies [Line Items]
Public Utilities, Approved Return on Equity, Percentage	12.38%
Electric Transmission [Member] | November 2013 to February 2015 [Member]
Loss Contingencies [Line Items]
Public Utilities, Approved Return on Equity, Percentage	10.32%
Public Utilities, Intervenor Proposed Return On Equity, Percentage	9.15%
Electric Transmission [Member] | February 2015 through May 2016 [Member]
Loss Contingencies [Line Items]
Public Utilities, Intervenor Proposed Return On Equity, Percentage	8.67%
Electric Transmission [Member] | Nov 2019 Order For Nov 2013 to Feb 2015 and Sept 2016 Forward [Member]
Loss Contingencies [Line Items]
Public Utilities, Approved Return on Equity, Percentage	9.88%
Public Utilities, Approved Return on Equity Plus Adder, Percentage	10.38%
Electric Transmission [Member] | May 2020 Order For Nov 2013 to Feb 2015 and Sept 2016 to May 2020
Loss Contingencies [Line Items]
Public Utilities, Approved Return on Equity, Percentage	10.02%
Public Utilities, Approved Return on Equity Plus Adder, Percentage	10.52%

Commitments and Contingencies_9

Commitments and Contingencies - NPC - Legal (Details) - Nevada Power Company [Member] - MW	12 Months Ended		36 Months Ended
	Dec. 31, 2020	Dec. 31, 2018	Dec. 31, 2016
536 Megawatts of Renewable Energy [Member]
Loss Contingencies [Line Items]
New Generation Capacity			536
200 Megawatts of Solar Renewable Energy [Member]
Loss Contingencies [Line Items]
New Generation Capacity			200
15 Megawatts of Solar Renewable Energy [Member]
Loss Contingencies [Line Items]
New Generation Capacity			15
35 Megawatts of Renewable Energy [Member]
Loss Contingencies [Line Items]
New Generation Capacity	35
255 Megawatts of Coal Energy [Member]
Loss Contingencies [Line Items]
Coal-Fired Power Plant Capacity	255
557 Megawatts of Coal Energy [Member]
Loss Contingencies [Line Items]
Coal-Fired Power Plant Capacity		557

Commitments and Contingencie_10

Commitments and Contingencies - NPC - Commitments Table (Details) $ in Millions	12 Months Ended
	Dec. 31, 2020USD ($)MW	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)
Contractual Obligation [Line Items]
Purchase Obligation, Due in Next Twelve Months	$ 563
Contractual Obligation, Due in Next Twelve Months	3,390
Contractual Obligation, Due in Second Year	2,371
Contractual Obligation, Due in Third Year	1,842
Contractual Obligation, Due in Fourth Year	1,615
Contractual Obligation, Due in Fifth Year	1,330
Contractual Obligation, Due after Fifth Year	16,653
Contractual Obligation	27,201
Fuel, capacity and transmission contract commitments [Member]
Contractual Obligation [Line Items]
Purchase Obligation, Due in Next Twelve Months	2,122
Purchase Obligation, Due in Second Year	1,559
Purchase Obligation, Due in Third Year	1,307
Purchase Obligation, Due in Fourth Year	1,285
Purchase Obligation, Due in Fifth Year	1,047
Purchase Obligation, Due after Fifth Year	12,985
Purchase Obligation	20,305
Capital Addition Purchase Commitments [Member]
Contractual Obligation [Line Items]
Purchase Obligation, Due in Next Twelve Months	783
Purchase Obligation, Due in Second Year	372
Purchase Obligation, Due in Third Year	148
Purchase Obligation, Due in Fourth Year	0
Purchase Obligation, Due in Fifth Year	0
Purchase Obligation, Due after Fifth Year	4
Purchase Obligation	1,307
Easements [Member]
Contractual Obligation [Line Items]
Purchase Obligation, Due in Next Twelve Months	72
Purchase Obligation, Due in Second Year	74
Purchase Obligation, Due in Third Year	74
Purchase Obligation, Due in Fourth Year	73
Purchase Obligation, Due in Fifth Year	73
Purchase Obligation, Due after Fifth Year	2,229
Purchase Obligation	2,595
Maintenance, service and other contracts [Member]
Contractual Obligation [Line Items]
Purchase Obligation, Due in Next Twelve Months	413
Purchase Obligation, Due in Second Year	366
Purchase Obligation, Due in Third Year	313
Purchase Obligation, Due in Fourth Year	257
Purchase Obligation, Due in Fifth Year	210
Purchase Obligation, Due after Fifth Year	1,435
Purchase Obligation	2,994
Nevada Power Company [Member]
Contractual Obligation [Line Items]
Contractual Obligation, Due in Next Twelve Months	694
Contractual Obligation, Due in Second Year	578
Contractual Obligation, Due in Third Year	585
Contractual Obligation, Due in Fourth Year	550
Contractual Obligation, Due in Fifth Year	574
Contractual Obligation, Due after Fifth Year	8,211
Contractual Obligation	11,192
Easement, Expense	$ 4	$ 7	$ 4
Nevada Power Company [Member] | 150 Megawatt Solar Photovoltaic Facility [Member]
Contractual Obligation [Line Items]
New Generation Capacity | MW	150
Nevada Power Company [Member] | 100 Megawatt Capacity of Co-Located Battery Storage [Member]
Contractual Obligation [Line Items]
New Generation Capacity | MW	100
Nevada Power Company [Member] | Fuel, capacity and transmission contract commitments [Member]
Contractual Obligation [Line Items]
Purchase Obligation, Due in Next Twelve Months	$ 570
Purchase Obligation, Due in Second Year	409
Purchase Obligation, Due in Third Year	328
Purchase Obligation, Due in Fourth Year	328
Purchase Obligation, Due in Fifth Year	331
Purchase Obligation, Due after Fifth Year	3,197
Purchase Obligation	5,163
Nevada Power Company [Member] | Fuel, capacity and transmission contract commitments, Not commercially operable [Member]
Contractual Obligation [Line Items]
Purchase Obligation, Due in Next Twelve Months	0
Purchase Obligation, Due in Second Year	35
Purchase Obligation, Due in Third Year	74
Purchase Obligation, Due in Fourth Year	197
Purchase Obligation, Due in Fifth Year	229
Purchase Obligation, Due after Fifth Year	4,965
Purchase Obligation	5,500
Nevada Power Company [Member] | Capital Addition Purchase Commitments [Member]
Contractual Obligation [Line Items]
Purchase Obligation, Due in Next Twelve Months	72
Purchase Obligation, Due in Second Year	85
Purchase Obligation, Due in Third Year	146
Purchase Obligation, Due in Fourth Year	0
Purchase Obligation, Due in Fifth Year	0
Purchase Obligation, Due after Fifth Year	0
Purchase Obligation	303
Nevada Power Company [Member] | Easements [Member]
Contractual Obligation [Line Items]
Purchase Obligation, Due in Next Twelve Months	4
Purchase Obligation, Due in Second Year	5
Purchase Obligation, Due in Third Year	5
Purchase Obligation, Due in Fourth Year	2
Purchase Obligation, Due in Fifth Year	2
Purchase Obligation, Due after Fifth Year	43
Purchase Obligation	61
Nevada Power Company [Member] | Maintenance, service and other contracts [Member]
Contractual Obligation [Line Items]
Purchase Obligation, Due in Next Twelve Months	48
Purchase Obligation, Due in Second Year	44
Purchase Obligation, Due in Third Year	32
Purchase Obligation, Due in Fourth Year	23
Purchase Obligation, Due in Fifth Year	12
Purchase Obligation, Due after Fifth Year	6
Purchase Obligation	$ 165

Commitments and Contingencie_11

Commitments and Contingencies - SPPC - Commitments Table (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Contractual Obligation [Line Items]
Purchase Obligation, Due in Next Twelve Months	$ 563
Contractual Obligation, Due in Next Twelve Months	3,390
Contractual Obligation, Due in Second Year	2,371
Contractual Obligation, Due in Third Year	1,842
Contractual Obligation, Due in Fourth Year	1,615
Contractual Obligation, Due in Fifth Year	1,330
Contractual Obligation, Due after Fifth Year	16,653
Contractual Obligation	27,201
Fuel, capacity and transmission contract commitments [Member]
Contractual Obligation [Line Items]
Purchase Obligation, Due in Next Twelve Months	2,122
Purchase Obligation, Due in Second Year	1,559
Purchase Obligation, Due in Third Year	1,307
Purchase Obligation, Due in Fourth Year	1,285
Purchase Obligation, Due in Fifth Year	1,047
Purchase Obligation, Due after Fifth Year	12,985
Purchase Obligation	20,305
Easements [Member]
Contractual Obligation [Line Items]
Purchase Obligation, Due in Next Twelve Months	72
Purchase Obligation, Due in Second Year	74
Purchase Obligation, Due in Third Year	74
Purchase Obligation, Due in Fourth Year	73
Purchase Obligation, Due in Fifth Year	73
Purchase Obligation, Due after Fifth Year	2,229
Purchase Obligation	2,595
Maintenance, service and other contracts [Member]
Contractual Obligation [Line Items]
Purchase Obligation, Due in Next Twelve Months	413
Purchase Obligation, Due in Second Year	366
Purchase Obligation, Due in Third Year	313
Purchase Obligation, Due in Fourth Year	257
Purchase Obligation, Due in Fifth Year	210
Purchase Obligation, Due after Fifth Year	1,435
Purchase Obligation	2,994
Sierra Pacific Power Company [Member]
Contractual Obligation [Line Items]
Contractual Obligation, Due in Next Twelve Months	344
Contractual Obligation, Due in Second Year	230
Contractual Obligation, Due in Third Year	138
Contractual Obligation, Due in Fourth Year	134
Contractual Obligation, Due in Fifth Year	135
Contractual Obligation, Due after Fifth Year	1,607
Contractual Obligation	2,588
Easement, Expense	2	$ 2	$ 2
Sierra Pacific Power Company [Member] | Fuel, capacity and transmission contract commitments [Member]
Contractual Obligation [Line Items]
Purchase Obligation, Due in Next Twelve Months	327
Purchase Obligation, Due in Second Year	186
Purchase Obligation, Due in Third Year	98
Purchase Obligation, Due in Fourth Year	95
Purchase Obligation, Due in Fifth Year	96
Purchase Obligation, Due after Fifth Year	940
Purchase Obligation	1,742
Sierra Pacific Power Company [Member] | Fuel, capacity and transmission contract commitments, Not commercially operable [Member]
Contractual Obligation [Line Items]
Purchase Obligation, Due in Next Twelve Months	6
Purchase Obligation, Due in Second Year	35
Purchase Obligation, Due in Third Year	36
Purchase Obligation, Due in Fourth Year	36
Purchase Obligation, Due in Fifth Year	36
Purchase Obligation, Due after Fifth Year	637
Purchase Obligation	786
Sierra Pacific Power Company [Member] | Easements [Member]
Contractual Obligation [Line Items]
Purchase Obligation, Due in Next Twelve Months	2
Purchase Obligation, Due in Second Year	2
Purchase Obligation, Due in Third Year	2
Purchase Obligation, Due in Fourth Year	2
Purchase Obligation, Due in Fifth Year	2
Purchase Obligation, Due after Fifth Year	30
Purchase Obligation	40
Sierra Pacific Power Company [Member] | Maintenance, service and other contracts [Member]
Contractual Obligation [Line Items]
Purchase Obligation, Due in Next Twelve Months	9
Purchase Obligation, Due in Second Year	7
Purchase Obligation, Due in Third Year	2
Purchase Obligation, Due in Fourth Year	1
Purchase Obligation, Due in Fifth Year	1
Purchase Obligation, Due after Fifth Year	0
Purchase Obligation	$ 20

Commitments and Contingencie_12

Commitments and Contingencies - EEGH (Details) $ in Millions	Dec. 31, 2020USD ($)
Eastern Energy Gas Holdings, LLC [Member] | Surety Bond [Member]
Loss Contingencies [Line Items]
Guarantor obligations, related party disclosure	$ 22

Preferred Stock - PacifiCorp (D

Preferred Stock - PacifiCorp (Details) shares in Thousands	12 Months Ended
	Dec. 31, 2020Payments$ / sharesshares	Dec. 31, 2019$ / sharesshares
Class of Stock [Line Items]
Preferred Stock, Shares Authorized	100,000
Preferred Stock, Par or Stated Value Per Share | $ / shares	$ 0.01
Preferred Stock, Shares Issued	4,000
Preferred Stock, Shares Outstanding	4,000
PacifiCorp [Member]
Class of Stock [Line Items]
Number Of Full Quarterly Dividend Payments In Default Before Preferred Stockholders Elect Board Of Directors | Payments	4
Preferred Stock Class, 5 Percent Preferred [Member] | PacifiCorp [Member]
Class of Stock [Line Items]
Preferred Stock, Shares Authorized	127	127
Preferred Stock, Dividend Rate, Percentage	5.00%	5.00%
Preferred Stock Class, Serial Preferred [Member] | PacifiCorp [Member]
Class of Stock [Line Items]
Preferred Stock, Shares Authorized	3,500	3,500
Preferred Stock, Par or Stated Value Per Share | $ / shares	$ 100	$ 100
Preferred Stock, Shares Issued	24	24
Preferred Stock, Shares Outstanding	24	24
Preferred Stock Class, No Par Serial Preferred [Member] | PacifiCorp [Member]
Class of Stock [Line Items]
Preferred Stock, Shares Authorized	16,000	16,000
Minimum [Member] | Preferred Stock Class, Serial Preferred [Member] | PacifiCorp [Member]
Class of Stock [Line Items]
Preferred Stock, Dividend Rate, Percentage	6.00%
Maximum [Member] | Preferred Stock Class, Serial Preferred [Member] | PacifiCorp [Member]
Class of Stock [Line Items]
Preferred Stock, Dividend Rate, Percentage	7.00%

BHE Shareholders' Equity (Detai

BHE Shareholders' Equity (Details) - USD ($) $ / shares in Units, $ in Millions	Oct. 29, 2020	Jun. 30, 2017	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Class of Stock [Line Items]
BHE junior subordinated debentures			$ 100	$ 100
Common stock, value, repurchased			126	293	$ 107
Preferred Stock, Value, Issued			$ 3,750	0
Preferred Stock, Shares Issued			4,000,000
Preferred Stock, Par or Stated Value Per Share			$ 0.01
Natural Gas Transmission and Storage Business Acquisition [Member]
Class of Stock [Line Items]
Preferred Stock, Dividend Rate, Percentage	4.00%
Preferred Stock, Value, Issued	$ 3,750
Preferred Stock, Shares Issued	3,750,000
Preferred Stock, Par or Stated Value Per Share	$ 1,000
Berkshire Hathaway Energy [Member] | BHE Junior Subordinated Debentures, due June 2057 [Member]
Class of Stock [Line Items]
Conversion of Stock, Shares Converted		181,819
Junior Subordinated Debt [Member] | Berkshire Hathaway Energy [Member]
Class of Stock [Line Items]
BHE junior subordinated debentures			$ 100	100
Junior Subordinated Debt [Member] | Berkshire Hathaway Energy [Member] | BHE Junior Subordinated Debentures, due June 2057 [Member]
Class of Stock [Line Items]
BHE junior subordinated debentures		$ 100		$ 100
Debt Instrument, Interest Rate, Stated Percentage		5.00%

BHE Shareholders' Equity - Rest

BHE Shareholders' Equity - Restricted Net Assets (Details) $ in Millions	Dec. 31, 2020USD ($)
Stockholders' Equity Note [Abstract]
BHE restricted net assets	$ 14,700
BHE's subsidiaries restricted net assets	$ 18,100

Common Shareholder's Equity - P

Common Shareholder's Equity - PacifiCorp (Details) - PacifiCorp [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Class of Stock [Line Items]
Dividends, Common Stock, Cash		$ 175	$ 450
Minimum Common Equity To Capitalization Percentage	44.00%
Actual common equity percentage as calculated in accordance with acquisition commitment	53.00%
Amount available for dividend distribution without prior approval	$ 2,700

Components of Accumulated Oth_3

Components of Accumulated Other Comprehensive Loss, Net (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	$ (1,706)
Other comprehensive (loss) income, unrecognized amounts on retirement benefits	(65)	$ (59)	$ 25
Other comprehensive (loss) income, foreign currency translation adjustment	233	327	(494)
Other comprehensive (loss) income, unrealized gains on cash flow hedges	(15)	(29)	7
Other comprehensive income (loss)	153	239	(462)
Ending balance	(1,552)	(1,706)
Total shareholders' equity	43,010	32,449
Accumulated Other Comprehensive Loss, Net [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance, unrecognized amounts on retirement benefits	(417)	(358)	(383)
Balance, foreign currency translation adjustment	(1,296)	(1,623)	(1,129)
Beginning balance	0	0	1,085
Beginning balance	7	36	29
Beginning balance	(1,706)	(1,945)	(398)
Other comprehensive (loss) income, unrecognized amounts on retirement benefits	(65)	(59)	25
Other comprehensive (loss) income, foreign currency translation adjustment	233	327	(494)
Other comprehensive (loss) income, unrealized gains on available-for-sale securities	0	0	0
Other comprehensive (loss) income, unrealized gains on cash flow hedges	(15)	(29)	7
Other comprehensive income (loss)	153	239	(462)
Balance, unrecognized amounts on retirement benefits	(482)	(417)	(358)
Balance, foreign currency translation adjustment	(1,063)	(1,296)	(1,623)
Ending balance	0	0	0
Ending balance	(8)	7	36
Ending balance	$ (1,553)	$ (1,706)	$ (1,945)
Accumulated Other Comprehensive Loss, Net [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Total shareholders' equity				$ (1,085)

Components of Accumulated Oth_4

Components of Accumulated Other Comprehensive Loss, Net - PacifiCorp (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
PacifiCorp [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Accumulated Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax	$ (19)	$ (16)

Components of Accumulated Oth_5

Components of Accumulated Other Comprehensive Loss, Net - EEGH (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance	$ 32,449
Balance	43,010	$ 32,449
Eastern Energy Gas Holdings, LLC [Member]
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Other comprehensive income (loss)	(134)	18	$ 71
Eastern Energy Gas Holdings, LLC [Member] | Accumulated Other Comprehensive Income (Loss) [Member]
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance	(187)	(169)	(98)
Balance	(53)	(187)	(169)
Eastern Energy Gas Holdings, LLC [Member] | AOCI Attributable to Noncontrolling Interest [Member]
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance	0	0	0
Balance	10	0	0
Eastern Energy Gas Holdings, LLC [Member] | Noncontrolling Interest [Member]
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Other comprehensive income (loss)	(10)	0	0
Eastern Energy Gas Holdings, LLC [Member] | Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance	(106)	(144)	(75)
Other comprehensive income (loss)	94	38	(69)
Balance	(12)	(106)	(144)
Eastern Energy Gas Holdings, LLC [Member] | Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member]
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance	(81)	(25)	(23)
Other comprehensive income (loss)	30	(56)	(2)
Balance	$ (51)	$ (81)	$ (25)

Components of Accumulated Oth_6

Components of Accumulated Other Comprehensive Loss, Net - EEGH - Reclassifications from AOCI (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Accumulated Other Comprehensive Loss, Net [Line Items]
Interest expense		$ 2,021	$ 1,912	$ 1,838
Other, net		88	97	(9)
Income tax expense (benefit)		308	(598)	(583)
Net income		7,014	2,968	2,591
Eastern Energy Gas Holdings, LLC [Member]
Accumulated Other Comprehensive Loss, Net [Line Items]
Interest expense		333	311	174
Other, net		42	43	48
Net income from continuing operations		273	701	632
Income tax expense (benefit)		(24)	101	124
Net income from discontinued operations	[1]	0	141	24
Net income		273	842	656
Eastern Energy Gas Holdings, LLC [Member] | Cash Flow Hedge [Member] | Reclassification out of Accumulated Other Comprehensive Income
Accumulated Other Comprehensive Loss, Net [Line Items]
Net income from continuing operations		132	7	26
Income tax expense (benefit)		(34)	(2)	(7)
Net income		98	5	19
Eastern Energy Gas Holdings, LLC [Member] | Cash Flow Hedge [Member] | Interest Rate Contract [Member] | Reclassification out of Accumulated Other Comprehensive Income
Accumulated Other Comprehensive Loss, Net [Line Items]
Interest expense		157	5	5
Eastern Energy Gas Holdings, LLC [Member] | Cash Flow Hedge [Member] | Foreign Exchange Contract [Member] | Reclassification out of Accumulated Other Comprehensive Income
Accumulated Other Comprehensive Loss, Net [Line Items]
Other, net		(25)	6	13
Eastern Energy Gas Holdings, LLC [Member] | Cash Flow Hedge [Member] | Commodity Contract [Member] | Reclassification out of Accumulated Other Comprehensive Income
Accumulated Other Comprehensive Loss, Net [Line Items]
Net income from discontinued operations			(4)	8
Eastern Energy Gas Holdings, LLC [Member] | Accumulated Defined Benefit Plans Adjustment Including Portion Attributable to Noncontrolling Interest [Member] | Reclassification out of Accumulated Other Comprehensive Income
Accumulated Other Comprehensive Loss, Net [Line Items]
Net income from continuing operations		6	7	6
Income tax expense (benefit)		(2)	(2)	(2)
Net income		4	5	4
Eastern Energy Gas Holdings, LLC [Member] | Accumulated Defined Benefit Plans Adjustment, Net Gain (Loss) Including Portion Attributable to Noncontrolling Interest [Member] | Reclassification out of Accumulated Other Comprehensive Income
Accumulated Other Comprehensive Loss, Net [Line Items]
Other, net		$ 6	$ 7	$ 6
[1]	Includes income tax expense of $33 million and less than $1 million for the years ended December 31, 2019 and 2018, respectively.

Variable-Interest Entities - EE

Variable-Interest Entities - EEGH (Details) - USD ($) $ in Millions	Nov. 06, 2019	Nov. 30, 2020	Jul. 31, 2020	Dec. 31, 2019	Jun. 30, 2015	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Eastern Energy Gas Holdings, LLC [Member] | Cove Point LNG, LP [Member]
Schedule of Equity Method Investments [Line Items]
Ownership interest					75.00%
Noncontrolling interest distributed			25.00%
Eastern Energy Gas Holdings, LLC [Member] | General Partner [Member] | Variable Interest Entity, Primary Beneficiary [Member] | Cove Point LNG, LP [Member]
Schedule of Equity Method Investments [Line Items]
Variable interest entity, ownership percentage						100.00%
Eastern Energy Gas Holdings, LLC [Member] | Limited Partner [Member] | Variable Interest Entity, Primary Beneficiary [Member] | Cove Point LNG, LP [Member]
Schedule of Equity Method Investments [Line Items]
Variable interest entity, ownership percentage						25.00%
Eastern Energy Gas Holdings, LLC [Member] | Disposal Group, Disposed of by Means Other than Sale, Not Discontinued Operations [Member] | GT&S Transaction [Member] | Cove Point LNG, LP [Member]
Schedule of Equity Method Investments [Line Items]
Noncontrolling interest distributed		50.00%
Eastern Energy Gas Holdings, LLC [Member] | Cove Point LNG, LP [Member] | Dominion Energy, Inc. [Member]
Schedule of Equity Method Investments [Line Items]
Ownership interest				75.00%
Eastern Energy Gas Holdings, LLC [Member] | Cove Point LNG, LP [Member] | Disposal Group, Disposed of by Means Other than Sale, Not Discontinued Operations [Member] | GT&S Transaction [Member]
Schedule of Equity Method Investments [Line Items]
Noncontrolling interest distributed		50.00%
Eastern Energy Gas Holdings, LLC [Member] | Carolina Gas Services, Inc. [Member] | Variable Interest Entity, Not Primary Beneficiary [Member]
Schedule of Equity Method Investments [Line Items]
Due to related parties				$ 9		$ 22	$ 9
Eastern Energy Gas Holdings, LLC [Member] | Carolina Gas Services, Inc. [Member] | Shared Services [Member] | Variable Interest Entity, Not Primary Beneficiary [Member]
Schedule of Equity Method Investments [Line Items]
Related party amounts of transaction						12	16	$ 16
Eastern Energy Gas Holdings, LLC [Member] | Dominion Energy Questar Pipeline Services, Inc. [Member] | Variable Interest Entity, Not Primary Beneficiary [Member]
Schedule of Equity Method Investments [Line Items]
Due to related parties				6			6
Eastern Energy Gas Holdings, LLC [Member] | Dominion Energy Questar Pipeline Services, Inc. [Member] | Shared Services [Member] | Variable Interest Entity, Not Primary Beneficiary [Member]
Schedule of Equity Method Investments [Line Items]
Related party amounts of transaction						23	33	29
Eastern Energy Gas Holdings, LLC [Member] | Dominion Energy Services, Inc. [Member] | Variable Interest Entity, Not Primary Beneficiary [Member]
Schedule of Equity Method Investments [Line Items]
Due to related parties				$ 27			27
Eastern Energy Gas Holdings, LLC [Member] | Dominion Energy Services, Inc. [Member] | Shared Services [Member] | Variable Interest Entity, Not Primary Beneficiary [Member]
Schedule of Equity Method Investments [Line Items]
Related party amounts of transaction						$ 90	$ 119	$ 106
Dominion Energy, Inc. [Member] | Cove Point LNG, LP [Member]
Schedule of Equity Method Investments [Line Items]
Ownership interest	25.00%	50.00%				50.00%
Dominion Energy, Inc. [Member] | Cove Point LNG, LP [Member]
Schedule of Equity Method Investments [Line Items]
Sold noncontrolling partner interest				25.00%

Variable-Interest Entities - Pa

Variable-Interest Entities - PacifiCorp (Details) - PacifiCorp [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Variable Interest Entity, Not Primary Beneficiary [Member]
Schedule of Equity Method Investments [Line Items]
Variable interest entity, ownership percentage	66.67%
Net Assets	$ 74	$ 81
Jim Bridger Unit Nos 1 thru 4 [Member]
Schedule of Equity Method Investments [Line Items]
Jointly Owned Utility Plant, Proportionate Ownership Share	67.00%
Jim Bridger Unit Nos 1 thru 4 [Member] | Variable Interest Entity, Not Primary Beneficiary [Member]
Schedule of Equity Method Investments [Line Items]
Jointly Owned Utility Plant, Proportionate Ownership Share	66.67%
Jointly Owned Utility Plant, Joint Owner Share	33.33%
Share of coal production purchased by Company	66.67%
Share of coal production purchased by joint venture partner	33.33%

Noncontrolling Interests (Detai

Noncontrolling Interests (Details) - USD ($) $ in Millions	Nov. 06, 2019	Nov. 30, 2020	Dec. 31, 2019	Dec. 31, 2020
Cove Point LNG, LP [Member] | Variable Interest Entity, Primary Beneficiary [Member] | Natural Gas Transmission and Storage Business Acquisition [Member] | Other Ownership Interest
Preferred Securities of Subsidiaries [Line Items]
Variable interest entity, ownership percentage				25.00%
Cove Point LNG, LP [Member] | Variable Interest Entity, Primary Beneficiary [Member] | Natural Gas Transmission and Storage Business Acquisition [Member] | General Partner [Member]
Preferred Securities of Subsidiaries [Line Items]
Variable interest entity, ownership percentage				100.00%
Cove Point LNG, LP [Member] | Variable Interest Entity, Primary Beneficiary [Member] | Natural Gas Transmission and Storage Business Acquisition [Member] | Limited Partner [Member]
Preferred Securities of Subsidiaries [Line Items]
Variable interest entity, ownership percentage				25.00%
Dominion Energy, Inc. [Member] | Cove Point LNG, LP [Member]
Preferred Securities of Subsidiaries [Line Items]
Ownership interest	25.00%	50.00%		50.00%
Brookfield Super-Core Infrastructure Partners [Member] | Cove Point LNG, LP [Member]
Preferred Securities of Subsidiaries [Line Items]
Ownership interest			25.00%	25.00%
Berkshire Hathaway Energy [Member]
Preferred Securities of Subsidiaries [Line Items]
Preferred stock of subsidiaries, value, outstanding noncontrolling interest, amount represented by preferred stock				$ 58
Northern Electric Plc [Member]
Preferred Securities of Subsidiaries [Line Items]
Preferred stock of subsidiaries, value, outstanding noncontrolling interest, amount represented by preferred stock				$ 56
Noncontrolling interest, dividend requirements of preferred stock				8.061
PacifiCorp [Member]
Preferred Securities of Subsidiaries [Line Items]
Preferred stock of subsidiaries, value, outstanding noncontrolling interest, amount represented by preferred stock				$ 2

Noncontrolling Interests - EEGH

Noncontrolling Interests - EEGH (Details) shares in Millions, $ in Millions	Nov. 06, 2019	Nov. 30, 2020	Dec. 31, 2019	Jan. 31, 2019USD ($)shares	Jun. 30, 2018USD ($)shares	Jun. 30, 2015	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)	May 31, 2018
Noncontrolling Interest [Line Items]
Acquisition of public interest in Northeast Midstream							$ (33)
Eastern Energy Gas Holdings, LLC [Member]
Noncontrolling Interest [Line Items]
Acquisition of public interest in Northeast Midstream							$ (343)	$ (40)
Eastern Energy Gas Holdings, LLC [Member] | Cove Point LNG, LP [Member]
Noncontrolling Interest [Line Items]
Ownership interest						75.00%
Dominion Energy, Inc. [Member] | Cove Point LNG, LP [Member]
Noncontrolling Interest [Line Items]
Ownership interest	25.00%	50.00%					50.00%
Dominion Energy, Inc. [Member] | Northeast Midstream [Member]
Noncontrolling Interest [Line Items]
Acquisition of public interest in Northeast Midstream					$ 375
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Changes, Additional Shares Issued to Parent | shares				22.5
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Changes, Additional Interest Issued to Parent				$ 1,600
Income Tax Effects Allocated Directly to Equity, Equity Transactions				$ 40
Dominion Energy, Inc. [Member] | Northeast Midstream [Member] | Limited Partner [Member]
Noncontrolling Interest [Line Items]
Limited Partners Capital Account, Convertible Subordinated Units, Conversion Ratio									1
Partners' Capital Account, Units, Incentive Distribution Rights Redeemed | shares					27
Brookfield Super-Core Infrastructure Partners [Member] | Cove Point LNG, LP [Member]
Noncontrolling Interest [Line Items]
Ownership interest			25.00%				25.00%
Northeast Midstream [Member]
Noncontrolling Interest [Line Items]
Limited Partners Capital Account, Common Units, Exchange Ratio				0.2492

Segment Information (Details)

Segment Information (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Segment Reporting Information [Line Items]
Revenues		$ 20,952	$ 19,844	$ 19,787
Depreciation and amortization - energy operations		(3,410)	(2,965)	(2,933)
Depreciation and amortization		3,455	3,011	2,984
Operating income (loss)		4,291	4,150	4,072
Interest expense		2,021	1,912	1,838
Capitalized interest		(80)	(77)	(61)
Allowance for equity funds		165	173	104
Other Interest and Dividend Income		71	117	113
Gain (Loss) on Investments		4,797	(288)	(538)
Other, net		88	97	(9)
Income before income tax expense and equity income		7,471	2,414	1,965
Income tax expense (benefit)		308	(598)	(583)
Net income attributable to BHE shareholders		6,943	2,950	2,568
Payments to Acquire Property, Plant, and Equipment		6,765	7,364	6,241
Property, plant and equipment, net		(86,128)	(73,305)	(68,087)
Assets		127,316	100,051	92,189
PacifiCorp [Member]
Segment Reporting Information [Line Items]
Revenues		5,341	5,068	5,026
Depreciation and amortization - energy operations		(1,209)	(954)	(979)
Operating income (loss)		924	1,072	1,051
Interest expense		426	401	384
Income tax expense (benefit)		(75)	61	5
Net income attributable to BHE shareholders		741	773	739
Payments to Acquire Property, Plant, and Equipment		2,540	2,175	1,257
Property, plant and equipment, net		(22,430)	(20,973)	(19,570)
Assets		26,862	24,861	23,478
MidAmerican Funding [Member]
Segment Reporting Information [Line Items]
Revenues		2,728	2,927	3,053
Depreciation and amortization - energy operations		(716)	(638)	(609)
Operating income (loss)		454	549	550
Interest expense		322	302	247
Income tax expense (benefit)		(574)	(377)	(262)
Net income attributable to BHE shareholders		818	781	669
Payments to Acquire Property, Plant, and Equipment		1,836	2,810	2,332
Property, plant and equipment, net		(19,279)	(18,377)	(16,169)
Assets		23,530	22,664	20,029
NV Energy [Member]
Segment Reporting Information [Line Items]
Revenues		2,854	3,037	3,039
Depreciation and amortization - energy operations		(502)	(482)	(456)
Operating income (loss)		649	655	607
Interest expense		227	229	224
Income tax expense (benefit)		61	98	100
Net income attributable to BHE shareholders		410	365	317
Payments to Acquire Property, Plant, and Equipment		675	657	503
Property, plant and equipment, net		(9,865)	(9,613)	(9,367)
Assets		14,501	14,128	14,119
Northern Powergrid Holdings [Member]
Segment Reporting Information [Line Items]
Revenues		1,022	1,013	1,020
Depreciation and amortization - energy operations		(266)	(254)	(250)
Operating income (loss)		421	472	486
Interest expense		130	139	141
Income tax expense (benefit)		96	59	61
Net income attributable to BHE shareholders		201	256	239
Payments to Acquire Property, Plant, and Equipment		682	602	566
Property, plant and equipment, net		(7,230)	(6,606)	(6,007)
Assets		8,782	8,385	7,427
BHE Transmission [Member]
Segment Reporting Information [Line Items]
Revenues		659	707	710
Depreciation and amortization - energy operations		(201)	(240)	(247)
Operating income (loss)		316	323	313
Interest expense		148	157	167
Income tax expense (benefit)		13	11	7
Net income attributable to BHE shareholders		231	229	210
Payments to Acquire Property, Plant, and Equipment		372	247	270
Property, plant and equipment, net		(6,445)	(6,157)	(5,824)
Assets		9,208	8,776	8,424
HomeServices [Member]
Segment Reporting Information [Line Items]
Revenues		5,396	4,473	4,214
Depreciation and amortization		45	47	51
Operating income (loss)		511	222	214
Interest expense		11	25	23
Income tax expense (benefit)		138	51	52
Net income attributable to BHE shareholders		375	160	145
Payments to Acquire Property, Plant, and Equipment		36	54	47
Property, plant and equipment, net		(159)	(161)	(141)
Assets		4,955	3,846	2,797
Berkshire Hathaway Energy And Other [Member]
Segment Reporting Information [Line Items]
Revenues	[1]	438	556	614
Depreciation and amortization - energy operations	[1]	(1)	(1)	(2)
Operating income (loss)	[1]	(54)	(51)	1
Interest expense	[1]	517	433	408
Income tax expense (benefit)	[1]	1,089	(314)	(507)
Net income attributable to BHE shareholders		3,118	(467)	(467)
Payments to Acquire Property, Plant, and Equipment		(130)	10	22
Property, plant and equipment, net		(22)	(40)	(50)
Assets		7,933	1,330	1,738
Berkshire Hathaway Energy Renewables [Member]
Segment Reporting Information [Line Items]
Revenues		936	932	908
Depreciation and amortization - energy operations		(284)	(282)	(268)
Operating income (loss)		291	336	325
Interest expense		166	174	201
Income tax expense (benefit)		(602)	(325)	(158)
Net income attributable to BHE shareholders		521	431	329
Payments to Acquire Property, Plant, and Equipment		95	122	817
Property, plant and equipment, net		(5,645)	(5,976)	(6,155)
Assets		12,004	9,961	8,666
BHE Pipeline Group [Member]
Segment Reporting Information [Line Items]
Revenues		1,578	1,131	1,203
Depreciation and amortization - energy operations		(231)	(115)	(126)
Operating income (loss)		779	572	525
Interest expense		74	52	43
Income tax expense (benefit)		162	138	119
Net income attributable to BHE shareholders		528	422	387
Payments to Acquire Property, Plant, and Equipment		659	687	427
Property, plant and equipment, net		(15,097)	(5,482)	(4,904)
Assets		19,541	6,100	5,511
UNITED STATES
Segment Reporting Information [Line Items]
Revenues		19,254	18,108	18,014
Income before income tax expense and equity income		6,954	1,866	1,425
Property, plant and equipment, net		(72,583)	(60,634)	(56,362)
UNITED KINGDOM
Segment Reporting Information [Line Items]
Revenues		1,022	1,011	1,017
Income before income tax expense and equity income		338	326	307
Property, plant and equipment, net		(7,134)	(6,504)	(5,895)
CANADA
Segment Reporting Information [Line Items]
Revenues		653	706	710
Income before income tax expense and equity income		173	178	155
Property, plant and equipment, net		(6,401)	(6,157)	(5,817)
The Philippines and other [Member]
Segment Reporting Information [Line Items]
Revenues		23	19	46
Income before income tax expense and equity income		6	44	78
Property, plant and equipment, net		$ (10)	$ (10)	$ (13)
[1]	The differences between the reportable segment amounts and the consolidated amounts, described as BHE and Other, relate to other corporate entities, including MidAmerican Energy Services, LLC, corporate functions and intersegment eliminations.

Segment Information - Goodwill

Segment Information - Goodwill (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Goodwill [Roll Forward]
Beginning balance	$ 9,722	$ 9,595
Acquisitions	1,731	29
Foreign currency translation	53	98
Ending balance	11,506	9,722
PacifiCorp [Member]
Goodwill [Roll Forward]
Beginning balance	1,129	1,129
Acquisitions	0	0
Foreign currency translation	0	0
Ending balance	1,129	1,129
MidAmerican Funding [Member]
Goodwill [Roll Forward]
Beginning balance	2,102	2,102
Acquisitions	0	0
Foreign currency translation	0	0
Ending balance	2,102	2,102
NV Energy [Member]
Goodwill [Roll Forward]
Beginning balance	2,369	2,369
Acquisitions	0	0
Foreign currency translation	0	0
Ending balance	2,369	2,369
Northern Powergrid Holdings [Member]
Goodwill [Roll Forward]
Beginning balance	978	952
Acquisitions	0	0
Foreign currency translation	22	26
Ending balance	1,000	978
BHE Transmission [Member]
Goodwill [Roll Forward]
Beginning balance	1,520	1,448
Acquisitions	0	0
Foreign currency translation	31	72
Ending balance	1,551	1,520
HomeServices [Member]
Goodwill [Roll Forward]
Beginning balance	1,456	1,427
Acquisitions	1	29
Foreign currency translation	0	0
Ending balance	1,457	1,456
Other [Member]
Goodwill [Roll Forward]
Beginning balance	0	0
Acquisitions	0	0
Foreign currency translation	0	0
Ending balance	0	0
Berkshire Hathaway Energy Renewables [Member]
Goodwill [Roll Forward]
Beginning balance	95	95
Acquisitions	0	0
Foreign currency translation	0	0
Ending balance	95	95
BHE Pipeline Group [Member]
Goodwill [Roll Forward]
Beginning balance	73	73
Acquisitions	1,730	0
Foreign currency translation	0	0
Ending balance	$ 1,803	$ 73

Segment Information - MEC (Deta

Segment Information - MEC (Details) $ in Millions	12 Months Ended
	Dec. 31, 2020USD ($)TheNumberOfReportableSegmentsOperatingSegments	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)
Segment Reporting Information [Line Items]
Number of Reportable Segments | OperatingSegments	8
Revenues	$ 20,952	$ 19,844	$ 19,787
Operating income (loss)	4,291	4,150	4,072
Interest expense	2,021	1,912	1,838
Income tax (benefit) expense	308	(598)	(583)
Net income attributable to BHE shareholders	6,943	2,950	2,568
Payments to Acquire Property, Plant, and Equipment	6,765	7,364	6,241
Assets	$ 127,316	100,051	92,189
MidAmerican Energy Company [Member]
Segment Reporting Information [Line Items]
Number of Reportable Segments | TheNumberOfReportableSegments	2
Revenues	$ 2,720	2,925	3,049
Depreciation and amortization	716	639	609
Operating income (loss)	448	548	551
Interest expense	304	281	227
Income tax (benefit) expense	(570)	(371)	(255)
Net income attributable to BHE shareholders	826	793	682
Payments to Acquire Property, Plant, and Equipment	1,836	2,810	2,332
Assets	21,437	20,564	17,920
MidAmerican Energy Company [Member] | Corporate and Other [Member]
Segment Reporting Information [Line Items]
Revenues	8	28	12
Operating income (loss)	0	4	1
Income tax (benefit) expense	0	1	2
Net income attributable to BHE shareholders	1	2	0
Assets	1	3	3
MidAmerican Energy Company [Member] | Natural Gas US Regulated
Segment Reporting Information [Line Items]
Revenues	573	660	754
Depreciation and amortization	49	46	44
Operating income (loss)	64	71	81
Interest expense	23	22	19
Income tax (benefit) expense	14	12	16
Net income attributable to BHE shareholders	45	52	54
Payments to Acquire Property, Plant, and Equipment	132	126	109
Assets	1,544	1,468	1,406
MidAmerican Energy Company [Member] | Electricity US Regulated
Segment Reporting Information [Line Items]
Revenues	2,139	2,237	2,283
Depreciation and amortization	667	593	565
Operating income (loss)	384	473	469
Interest expense	281	259	208
Income tax (benefit) expense	(584)	(384)	(273)
Net income attributable to BHE shareholders	780	739	628
Payments to Acquire Property, Plant, and Equipment	1,704	2,684	2,223
Assets	$ 19,892	$ 19,093	$ 16,511

Segment Information - MidAmeric

Segment Information - MidAmerican Funding (Details) $ in Millions	12 Months Ended
	Dec. 31, 2020USD ($)TheNumberOfReportableSegmentsOperatingSegments	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)
Segment Reporting Information [Line Items]
Number of Reportable Segments | OperatingSegments	8
Revenues	$ 20,952	$ 19,844	$ 19,787
Operating income (loss)	4,291	4,150	4,072
Interest expense	2,021	1,912	1,838
Income tax (benefit) expense	308	(598)	(583)
Net income (loss) attributable to parent	6,943	2,950	2,568
Payments to Acquire Property, Plant, and Equipment	6,765	7,364	6,241
Assets	127,316	100,051	92,189
Goodwill	$ 11,506	9,722	9,595
MidAmerican Funding, LLC and Subsidiaries [Member]
Segment Reporting Information [Line Items]
Number of Reportable Segments | TheNumberOfReportableSegments	2
Revenues	$ 2,728	2,927	3,053
Depreciation and amortization	716	639	609
Operating income (loss)	454	549	550
Interest expense	322	302	247
Income tax (benefit) expense	(574)	(377)	(262)
Net income (loss) attributable to parent	818	781	669
Payments to Acquire Property, Plant, and Equipment	1,836	2,810	2,332
Assets	22,711	21,840	19,202
Goodwill	1,270	1,270
MidAmerican Funding, LLC and Subsidiaries [Member] | Electricity US Regulated
Segment Reporting Information [Line Items]
Revenues	2,139	2,237	2,283
Depreciation and amortization	667	593	565
Operating income (loss)	384	473	469
Interest expense	281	259	208
Income tax (benefit) expense	(584)	(384)	(273)
Net income (loss) attributable to parent	780	739	628
Payments to Acquire Property, Plant, and Equipment	1,704	2,684	2,223
Assets	21,083	20,284	17,702
Goodwill	1,191
MidAmerican Funding, LLC and Subsidiaries [Member] | Natural Gas US Regulated
Segment Reporting Information [Line Items]
Revenues	573	660	754
Depreciation and amortization	49	46	44
Operating income (loss)	64	71	81
Interest expense	23	22	19
Income tax (benefit) expense	14	12	16
Net income (loss) attributable to parent	45	52	54
Payments to Acquire Property, Plant, and Equipment	132	126	109
Assets	1,623	1,547	1,485
Goodwill	79
MidAmerican Funding, LLC and Subsidiaries [Member] | Corporate and Other [Member]
Segment Reporting Information [Line Items]
Revenues	16	30	16
Operating income (loss)	6	5	0
Interest expense	18	21	20
Income tax (benefit) expense	(4)	(5)	(5)
Net income (loss) attributable to parent	(7)	(10)	(13)
Assets	$ 5	$ 9	$ 15

Segment Information - SPPC (Det

Segment Information - SPPC (Details) $ in Millions		12 Months Ended
		Dec. 31, 2020USD ($)TheNumberOfReportableSegmentsOperatingSegments	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)
Segment Reporting Information [Line Items]
Number of Reportable Segments | OperatingSegments		8
Revenues		$ 20,952	$ 19,844	$ 19,787
Operating income (loss)		4,291	4,150	4,072
Interest expense		2,021	1,912	1,838
Allowance for equity funds		165	173	104
Other, net		88	97	(9)
Income before income tax expense and equity income		7,471	2,414	1,965
Assets		$ 127,316	100,051	92,189
Sierra Pacific Power Company [Member]
Segment Reporting Information [Line Items]
Number of Reportable Segments | TheNumberOfReportableSegments		2
Revenues		$ 854	889	855
Operating income (loss)		165	171	152
Interest expense		56	48	44
Allowance for equity funds		4	3	4
Other, net		11	4	9
Income before income tax expense and equity income		126	131	122
Assets		3,919	3,671	3,569
Sierra Pacific Power Company [Member] | Electricity US Regulated
Segment Reporting Information [Line Items]
Revenues		738	770	752
Operating income (loss)		147	150	136
Assets		3,540	3,319	3,177
Sierra Pacific Power Company [Member] | Natural Gas US Regulated
Segment Reporting Information [Line Items]
Revenues		116	119	103
Operating income (loss)		18	21	16
Assets		342	308	314
Sierra Pacific Power Company [Member] | Regulated common assets [Member]
Segment Reporting Information [Line Items]
Assets	[1]	$ 37	$ 44	$ 78
[1]	Consists principally of cash and cash equivalents not included in either the regulated electric or regulated natural gas segments.

Subsequent Events (MEC) Subsequ

Subsequent Events (MEC) Subsequent Events - MEC (Details) $ in Millions	Dec. 31, 2020USD ($)
Subsequent Event [Line Items]
Par value	$ 49,759
MidAmerican Energy Company [Member]
Subsequent Event [Line Items]
Par value	7,276
MidAmerican Energy Company [Member] | MEC First Mortgage Bonds, 3.95%, Due 2047 [Member]
Subsequent Event [Line Items]
Par value	$ 475
Debt Instrument, Interest Rate, Stated Percentage	3.95%

Schedule I Condensed Balance Sh

Schedule I Condensed Balance Sheets (Details) - USD ($) $ in Millions		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents		$ 1,290	$ 1,040
Accounts receivable		2,107	1,910
Other current assets		2,741	839
Total current assets		9,447	5,913
Goodwill		11,506	9,722	$ 9,595
Other assets		2,758	2,090
Total assets		127,316	100,051	92,189
Current liabilities:
Short-term debt	[1]	2,286	3,214
Total current liabilities		9,138	10,257
BHE senior debt		12,997	8,231
BHE junior subordinated debentures		100	100
Long-term Debt		49,866	39,353
Other long-term liabilities		4,178	3,649
Total liabilities		80,339	67,473
Shareholders' equity:
Common stock		0	0
Additional paid-in capital		6,377	6,389
Long-term income tax receivable		658	530
Retained earnings		35,093	28,296
Accumulated other comprehensive loss, net		(1,552)	(1,706)
Total shareholders' equity		43,010	32,449
Noncontrolling interest		3,967	129
Total equity		46,977	32,578	29,723	$ 28,308
Total liabilities and shareholder's equity		127,316	100,051
Parent Company [Member]
Current assets:
Cash and cash equivalents		623	13	9	346
Accounts Receivable, Related Parties		96	87
Due from Affiliates		177	181
Income tax receivable		19	3
Other current assets		1,301	8
Total current assets		2,216	292
Investments in subsidiaries		48,654	40,204
Other Investments		6,103	1,300
Goodwill		1,221	1,221
Other assets		488	695
Total assets		58,682	43,712
Current liabilities:
Accounts payable and other current liabilities		341	194
Notes Payable, Related Parties, Current		200	240
Short-term debt		0	1,590
Current portion of senior debt		450	350
Total current liabilities		991	2,374
BHE senior debt		12,997	8,231
BHE junior subordinated debentures		100	100
Notes payable - affiliate		116	2
Other long-term liabilities		1,468	530
Total liabilities		15,672	11,237
Shareholders' equity:
Common stock		0	0
Additional paid-in capital		6,377	6,389
Long-term income tax receivable		658	530
Retained earnings		35,093	28,296
Accumulated other comprehensive loss, net		(1,552)	(1,706)
Total shareholders' equity		43,010	32,449
Noncontrolling interest		0	26
Total equity		43,010	32,475
Total liabilities and shareholder's equity		58,682	43,712
MidAmerican Funding LLC [Member]
Current assets:
Cash and cash equivalents		0	0	$ 0	$ 0
Due from Affiliates		1	2
Investments in subsidiaries		9,176	8,346
Total assets		9,177	8,348
Current liabilities:
Other accrued current liabilities		5	6
Long-term Debt		240	240
Notes payable - affiliate		13	1
Total liabilities		258	247
Shareholders' equity:
Paid-in capital		1,679	1,679
Retained earnings		7,240	6,422
Total shareholders' equity		8,919	8,101
Total liabilities and shareholder's equity		$ 9,177	$ 8,348
[1]	The table does not include unused credit facilities and letters of credit for investments that are accounted for under the equity method.

Schedule I Condensed Balance _2

Schedule I Condensed Balance Sheets (Details) (Parenthetical) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Condensed Financial Statements, Captions [Line Items]
Common Stock, Shares Authorized	115	115
Common Stock, Shares, Issued	76	77
Common Stock, Shares, Outstanding	76	77
Preferred Stock, Value, Issued	$ 3,750	$ 0
Long-term income tax receivable	$ (658)	$ (530)
Preferred Stock, Shares Issued	4
Preferred Stock, Shares Outstanding	4
Common Stock, stated value per share	$ 0	$ 0
Parent Company [Member]
Condensed Financial Statements, Captions [Line Items]
Common Stock, Shares, Issued	76	77
Common Stock, Shares, Outstanding	76	77
Preferred Stock, Value, Issued	$ 3,750	$ 0
Long-term income tax receivable	$ (658)	$ (530)

Schedule I Condensed Statements

Schedule I Condensed Statements of Operations (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Operating costs and expenses:
Depreciation and amortization	$ 3,455	$ 3,011	$ 2,984
Total operating costs and expenses	16,661	15,694	15,715
Operating loss	4,291	4,150	4,072
Other income (expense):
Interest expense	(2,021)	(1,912)	(1,838)
Other, net	88	97	(9)
Total other income (expense)	3,180	(1,736)	(2,107)
Loss before income tax benefit and equity income	7,471	2,414	1,965
Income tax (benefit) expense	308	(598)	(583)
Equity income (loss)	(149)	(44)	43
Net income	7,014	2,968	2,591
Net income attributable to noncontrolling interests	71	18	23
Net income (loss) attributable to parent	6,943	2,950	2,568
Dividends, Preferred Stock	26	0	0
Undistributed Earnings (Loss) Available to Common Shareholders, Diluted	6,917	2,950	2,568
Parent Company [Member]
Operating costs and expenses:
General and administration	57	49	21
Depreciation and amortization	4	5	4
Total operating costs and expenses	61	54	25
Operating loss	(61)	(54)	(25)
Other income (expense):
Interest expense	(527)	(452)	(438)
Other, net	4,789	(271)	(537)
Total other income (expense)	4,262	(723)	(975)
Loss before income tax benefit and equity income	4,201	(777)	(1,000)
Income tax (benefit) expense	1,089	(312)	(513)
Equity income (loss)	3,832	3,419	3,058
Net income	6,944	2,954	2,571
Net income attributable to noncontrolling interests	1	3	3
Net income (loss) attributable to parent	6,943	2,951	2,568
Dividends, Preferred Stock	26	0	0
Undistributed Earnings (Loss) Available to Common Shareholders, Diluted	6,917	2,951	2,568
MidAmerican Funding LLC [Member]
Other income (expense):
Interest Expense, Long-term Debt	(16)	(16)	(16)
Loss before income tax benefit and equity income	(16)	(16)	(16)
Income tax (benefit) expense	(5)	(5)	(5)
Equity income (loss)	829	792	680
Net income (loss) attributable to parent	$ 818	$ 781	$ 669

Schedule I Condensed Statemen_2

Schedule I Condensed Statements of Comprehensive Income Schedule I Condensed Statements of Comprehensive Income (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Condensed Financial Statements, Captions [Line Items]
Net income attributable to BHE shareholders	$ 6,943	$ 2,950	$ 2,568
Net income	7,014	2,968	2,591
Other comprehensive income (loss), net of tax	153	239	(462)
Comprehensive income	7,167	3,207	2,129
Comprehensive income attributable to noncontrolling interests	71	18	23
Comprehensive income attributable to BHE shareholders	7,096	3,189	2,106
Parent Company [Member]
Condensed Financial Statements, Captions [Line Items]
Net income attributable to BHE shareholders	6,943	2,951	2,568
Net income	6,944	2,954	2,571
Other comprehensive income (loss), net of tax	153	239	(462)
Comprehensive income	7,097	3,193	2,109
Comprehensive income attributable to noncontrolling interests	1	3	3
Comprehensive income attributable to BHE shareholders	7,096	3,190	2,106
MidAmerican Funding LLC [Member]
Condensed Financial Statements, Captions [Line Items]
Net income attributable to BHE shareholders	$ 818	$ 781	$ 669

Schedule I Condensed Statemen_3

Schedule I Condensed Statements of Cash Flows Schedule I Condensed Statements of Cash Flows (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Condensed Financial Statements, Captions [Line Items]
Cash flows from operating activities	$ 6,224	$ 6,206	$ 6,770
Cash flows from investing activities:
Purchases of marketable securities	(370)	(262)	(329)
Proceeds from sale of investments	325	238	287
Other, net	(1,234)	69	83
Net cash flows from investing activities	(13,165)	(8,963)	(6,989)
Cash flows from financing activities:
Proceeds from BHE senior debt	5,212	0	3,166
Proceeds from Issuance of Preferred Stock and Preference Stock	3,750	0	0
Payments for Repurchase of Common Stock	126	293	107
Net (repayments of) proceeds from short-term debt	(939)	684	(1,946)
Other, net	(258)	(52)	(41)
Net cash flows from financing activities	7,103	3,124	(174)
Cash and cash equivalents and restricted cash and cash equivalents at beginning of period	1,040
Cash and cash equivalents and restricted cash and cash equivalents at end of period	1,290	1,040
Parent Company [Member]
Condensed Financial Statements, Captions [Line Items]
Cash flows from operating activities	1,639	1,780	1,885
Cash flows from investing activities:
Investments in subsidiaries	(6,422)	(1,972)	(1,791)
Purchases of marketable securities	(1,345)	(42)	(44)
Proceeds from sale of investments	22	42	45
Notes receivable from affiliate, net	(121)	(112)	(72)
Other, net	(20)	(5)	(22)
Net cash flows from investing activities	(7,886)	(2,089)	(1,884)
Cash flows from financing activities:
Proceeds from BHE senior debt	5,212	0	3,166
Repayments of BHE senior debt	(350)	0	(1,045)
Proceeds from Issuance of Preferred Stock and Preference Stock	3,750	0	0
Payments for Repurchase of Common Stock	126	293	107
Net (repayments of) proceeds from short-term debt	(1,590)	607	(2,348)
Other, net	(39)	(1)	(4)
Net cash flows from financing activities	6,857	313	(338)
Cash and cash equivalents and restricted cash and cash equivalents at beginning of period	13	9	346
Cash and cash equivalents and restricted cash and cash equivalents at end of period	623	13	9
MidAmerican Funding LLC [Member]
Condensed Financial Statements, Captions [Line Items]
Cash flows from operating activities	(12)	(12)	2
Cash flows from investing activities:
Net cash flows from investing activities	0	0	0
Cash flows from financing activities:
Net change in amounts payable to subsidiary	12	12	(2)
Net cash flows from financing activities	12	12	(2)
Net change in cash and cash equivalents and restricted cash and cash equivalents	0	0	0
Cash and cash equivalents and restricted cash and cash equivalents at beginning of period	0	0	0
Cash and cash equivalents and restricted cash and cash equivalents at end of period	$ 0	$ 0	$ 0

Condensed Financial Statement_2

Condensed Financial Statements - Other Investments (Details) - BYD Company Limited common stock [Member] - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Investments, Including Equity Method And Restricted Cash And Investments [Line Items]
Available-for-sale Securities, Equity Securities	$ 5,897	$ 1,122
Parent Company [Member]
Investments, Including Equity Method And Restricted Cash And Investments [Line Items]
Available-for-sale Securities, Equity Securities	$ 5,897	$ 1,122

Condensed Financial Statement_3

Condensed Financial Statements - Dividends and Distributions (Details) - Parent Company [Member] - USD ($) $ in Millions	2 Months Ended	12 Months Ended
	Feb. 26, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Distribution [Line Items]
Proceeds from dividends received		$ 2,000	$ 2,000	$ 2,300
Subsequent Event [Member]
Distribution [Line Items]
Proceeds from dividends received	$ 131

Condensed Financial Statement_4

Condensed Financial Statements - Guarantees (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Tax Equity Contributions	$ 2,736	$ 1,619	$ 698
Parent Company [Member]
Debt Instrument [Line Items]
Guarantor obligations, related party disclosure	1,300
Tax Equity Contributions	$ 563

Schedule I Condensed Financial

Schedule I Condensed Financial Statements Condensed Financial Statements - MidAmerican Funding - Payable to Affiliate (Details) - MidAmerican Funding LLC [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Condensed Financial Statements, Captions [Line Items]
Net change in amounts payable to subsidiary	$ (12)	$ (12)	$ 2
us-gaap_DividendsCommonStockNonCash		8
us-gaap_DividendsReceivedNoncash		440
MHC, Inc. [Member]
Condensed Financial Statements, Captions [Line Items]
Net change in amounts payable to subsidiary	$ (12)	$ (12)	$ (2)

Schedule II Consolidated Valu_2

Schedule II Consolidated Valuation and Qualifying Accounts (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
SEC Schedule, 12-09, Allowance, Credit Loss [Member]
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year		$ 44	$ 42	$ 40
Valuation Allowances and Reserves, Charged to Cost and Expense		56	47	43
Valuation Allowances and Reserves, Adjustments		5	0	0
SEC Schedule, 12-09, Valuation Allowances and Reserves, Deduction		(28)	(45)	(41)
Balance at End of Year		77	44	42
Reserves not deducted from assets [Member]
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	[1]	12	13	13
Valuation Allowances and Reserves, Charged to Cost and Expense	[1]	3	4	6
Valuation Allowances and Reserves, Adjustments	[1]	0	0	0
SEC Schedule, 12-09, Valuation Allowances and Reserves, Deduction	[1]	(4)	(5)	(6)
Balance at End of Year	[1]	$ 11	$ 12	$ 13
[1]	Reserves not deducted from assets relate primarily to estimated liabilities for losses retained by BHE for workers compensation, public liability and property damage claims.

Schedule II Consolidated Valu_3

Schedule II Consolidated Valuation and Qualifying Accounts - MEC (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2020
SEC Schedule, 12-09, Allowance, Credit Loss [Member]
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year		$ 44	$ 42	$ 40
Valuation Allowances and Reserves, Charged to Cost and Expense		56	47	43
SEC Schedule, 12-09, Valuation Allowances and Reserves, Deduction		(28)	(45)	(41)
SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount		44	42	40	$ 77
Reserves not deducted from assets [Member]
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	[1]	12	13	13
Valuation Allowances and Reserves, Charged to Cost and Expense	[1]	3	4	6
SEC Schedule, 12-09, Valuation Allowances and Reserves, Deduction	[1]	(4)	(5)	(6)
SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount	[1]	12	13	13	11
MidAmerican Energy Company [Member] | SEC Schedule, 12-09, Allowance, Credit Loss [Member]
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year		5	7	7
Valuation Allowances and Reserves, Charged to Cost and Expense		12	9	8
SEC Schedule, 12-09, Valuation Allowances and Reserves, Deduction		(5)	(11)	(8)
SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount		5	7	7	12
MidAmerican Energy Company [Member] | Reserves not deducted from assets [Member]
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year		12	13	13
Valuation Allowances and Reserves, Charged to Cost and Expense		3	4	6
SEC Schedule, 12-09, Valuation Allowances and Reserves, Deduction		(4)	(5)	(6)
SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount		$ 12	$ 13	$ 13	$ 11
[1]	Reserves not deducted from assets relate primarily to estimated liabilities for losses retained by BHE for workers compensation, public liability and property damage claims.

Schedule II Consolidated Valu_4

Schedule II Consolidated Valuation and Qualifying Accounts Schedule II Consolidated Valuation and Qualifying Accounts - LLC (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
SEC Schedule, 12-09, Allowance, Credit Loss [Member]
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount		$ 77	$ 44	$ 42	$ 40
Valuation Allowances and Reserves, Charged to Cost and Expense		56	47	43
SEC Schedule, 12-09, Valuation Allowances and Reserves, Deduction		28	45	41
Reserves not deducted from assets [Member]
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount	[1]	11	12	13	13
Valuation Allowances and Reserves, Charged to Cost and Expense	[1]	3	4	6
SEC Schedule, 12-09, Valuation Allowances and Reserves, Deduction	[1]	4	5	6
MidAmerican Funding, LLC and Subsidiaries [Member] | SEC Schedule, 12-09, Allowance, Credit Loss [Member]
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount		12	5	7	7
Valuation Allowances and Reserves, Charged to Cost and Expense		12	9	8
SEC Schedule, 12-09, Valuation Allowances and Reserves, Deduction		5	11	8
MidAmerican Funding, LLC and Subsidiaries [Member] | Reserves not deducted from assets [Member]
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount		11	12	13	$ 13
Valuation Allowances and Reserves, Charged to Cost and Expense		3	4	6
SEC Schedule, 12-09, Valuation Allowances and Reserves, Deduction		$ 4	$ 5	$ 6
[1]	Reserves not deducted from assets relate primarily to estimated liabilities for losses retained by BHE for workers compensation, public liability and property damage claims.

Revenue from Contract with Cu_3

Revenue from Contract with Customer (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		$ 15,081	$ 14,837	$ 14,972
Revenues		(20,952)	(19,844)	(19,787)
PacifiCorp [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		5,243	4,986	4,890
Revenues		(5,341)	(5,068)	(5,026)
MidAmerican Funding [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		2,704	2,904	3,032
Revenues		(2,728)	(2,927)	(3,053)
NV Energy, Inc. [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		2,824	3,007	3,011
Revenues		(2,854)	(3,037)	(3,039)
Northern Powergrid Holdings [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		913	912	931
Revenues		(1,022)	(1,013)	(1,020)
BHE Pipeline Group [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		1,548	1,122	1,232
Revenues		(1,578)	(1,131)	(1,203)
BHE Transmission [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		659	707	710
Revenues		(659)	(707)	(710)
BHE Renewables [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		817	744	673
Revenues		(936)	(932)	(908)
Berkshire Hathaway Energy And Other [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		373	455	493
Revenues	[1]	(438)	(556)	(614)
Regulated Operation [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		13,553	13,433	13,612
Regulated Operation [Member] | PacifiCorp [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		5,243	4,986	4,890
Regulated Operation [Member] | MidAmerican Funding [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		2,688	2,874	3,018
Regulated Operation [Member] | NV Energy, Inc. [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		2,822	3,007	3,011
Regulated Operation [Member] | Northern Powergrid Holdings [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		887	876	892
Regulated Operation [Member] | BHE Pipeline Group [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		1,414	1,122	1,232
Regulated Operation [Member] | BHE Transmission [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		641	690	700
Regulated Operation [Member] | BHE Renewables [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		0	0	0
Regulated Operation [Member] | Berkshire Hathaway Energy And Other [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		(142)	(122)	(131)
Other customer revenue [Member] | Regulated Operation [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		110	2	2
Other customer revenue [Member] | Regulated Operation [Member] | PacifiCorp [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		108	0	0
Other customer revenue [Member] | Regulated Operation [Member] | MidAmerican Funding [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		0	0	0
Other customer revenue [Member] | Regulated Operation [Member] | NV Energy, Inc. [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		2	2	2
Other customer revenue [Member] | Regulated Operation [Member] | Northern Powergrid Holdings [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		0	0	0
Other customer revenue [Member] | Regulated Operation [Member] | BHE Pipeline Group [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		0	0	0
Other customer revenue [Member] | Regulated Operation [Member] | BHE Transmission [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		0	0	0
Other customer revenue [Member] | Regulated Operation [Member] | BHE Renewables [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		0	0	0
Other customer revenue [Member] | Regulated Operation [Member] | Berkshire Hathaway Energy And Other [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		0	0	0
Nonregulated products and services [Member] | Nonregulated Operation [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		1,528	1,404	1,360
Nonregulated products and services [Member] | Nonregulated Operation [Member] | PacifiCorp [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		0	0	0
Nonregulated products and services [Member] | Nonregulated Operation [Member] | MidAmerican Funding [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		16	30	14
Nonregulated products and services [Member] | Nonregulated Operation [Member] | NV Energy, Inc. [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		2	0	0
Nonregulated products and services [Member] | Nonregulated Operation [Member] | Northern Powergrid Holdings [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		26	36	39
Nonregulated products and services [Member] | Nonregulated Operation [Member] | BHE Pipeline Group [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		134	0	0
Nonregulated products and services [Member] | Nonregulated Operation [Member] | BHE Transmission [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		18	17	10
Nonregulated products and services [Member] | Nonregulated Operation [Member] | BHE Renewables [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		817	744	673
Nonregulated products and services [Member] | Nonregulated Operation [Member] | Berkshire Hathaway Energy And Other [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		515	577	624
Regulated interstate pipeline [Member] | Regulated Operation [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		1,258	1,004	1,107
Regulated interstate pipeline [Member] | Regulated Operation [Member] | PacifiCorp [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		0	0	0
Regulated interstate pipeline [Member] | Regulated Operation [Member] | MidAmerican Funding [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		0	0	0
Regulated interstate pipeline [Member] | Regulated Operation [Member] | NV Energy, Inc. [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		0	0	0
Regulated interstate pipeline [Member] | Regulated Operation [Member] | Northern Powergrid Holdings [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		0	0	0
Regulated interstate pipeline [Member] | Regulated Operation [Member] | BHE Pipeline Group [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		1,397	1,122	1,232
Regulated interstate pipeline [Member] | Regulated Operation [Member] | BHE Transmission [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		0	0	0
Regulated interstate pipeline [Member] | Regulated Operation [Member] | BHE Renewables [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		0	0	0
Regulated interstate pipeline [Member] | Regulated Operation [Member] | Berkshire Hathaway Energy And Other [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		(139)	(118)	(125)
Regulated transmission and distribution [Member] | Regulated Operation [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		1,779	1,819	1,846
Regulated transmission and distribution [Member] | Regulated Operation [Member] | PacifiCorp [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		96	98	103
Regulated transmission and distribution [Member] | Regulated Operation [Member] | MidAmerican Funding [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		60	57	56
Regulated transmission and distribution [Member] | Regulated Operation [Member] | NV Energy, Inc. [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		95	98	96
Regulated transmission and distribution [Member] | Regulated Operation [Member] | Northern Powergrid Holdings [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		887	876	892
Regulated transmission and distribution [Member] | Regulated Operation [Member] | BHE Pipeline Group [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		0	0	0
Regulated transmission and distribution [Member] | Regulated Operation [Member] | BHE Transmission [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		641	690	700
Regulated transmission and distribution [Member] | Regulated Operation [Member] | BHE Renewables [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		0	0	0
Regulated transmission and distribution [Member] | Regulated Operation [Member] | Berkshire Hathaway Energy And Other [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		0	0	(1)
Regulated wholesale [Member] | Regulated Operation [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		366	457	501
Regulated wholesale [Member] | Regulated Operation [Member] | PacifiCorp [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		107	99	55
Regulated wholesale [Member] | Regulated Operation [Member] | MidAmerican Funding [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		199	309	411
Regulated wholesale [Member] | Regulated Operation [Member] | NV Energy, Inc. [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		45	51	39
Regulated wholesale [Member] | Regulated Operation [Member] | Northern Powergrid Holdings [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		0	0	0
Regulated wholesale [Member] | Regulated Operation [Member] | BHE Pipeline Group [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		17	0	0
Regulated wholesale [Member] | Regulated Operation [Member] | BHE Transmission [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		0	0	0
Regulated wholesale [Member] | Regulated Operation [Member] | BHE Renewables [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		0	0	0
Regulated wholesale [Member] | Regulated Operation [Member] | Berkshire Hathaway Energy And Other [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		(2)	(2)	(4)
Regulated retail gas [Member] | Regulated Operation [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		619	686	737
Regulated retail gas [Member] | Regulated Operation [Member] | PacifiCorp [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		0	0	0
Regulated retail gas [Member] | Regulated Operation [Member] | MidAmerican Funding [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		505	570	636
Regulated retail gas [Member] | Regulated Operation [Member] | NV Energy, Inc. [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		114	116	101
Regulated retail gas [Member] | Regulated Operation [Member] | Northern Powergrid Holdings [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		0	0	0
Regulated retail gas [Member] | Regulated Operation [Member] | BHE Pipeline Group [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		0	0	0
Regulated retail gas [Member] | Regulated Operation [Member] | BHE Transmission [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		0	0	0
Regulated retail gas [Member] | Regulated Operation [Member] | BHE Renewables [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		0	0	0
Regulated retail gas [Member] | Regulated Operation [Member] | Berkshire Hathaway Energy And Other [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		0	0	0
Regulated retail electric [Member] | Regulated Operation [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		9,421	9,465	9,419
Regulated retail electric [Member] | Regulated Operation [Member] | PacifiCorp [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		4,932	4,789	4,732
Regulated retail electric [Member] | Regulated Operation [Member] | MidAmerican Funding [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		1,924	1,938	1,915
Regulated retail electric [Member] | Regulated Operation [Member] | NV Energy, Inc. [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		2,566	2,740	2,773
Regulated retail electric [Member] | Regulated Operation [Member] | Northern Powergrid Holdings [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		0	0	0
Regulated retail electric [Member] | Regulated Operation [Member] | BHE Pipeline Group [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		0	0	0
Regulated retail electric [Member] | Regulated Operation [Member] | BHE Transmission [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		0	0	0
Regulated retail electric [Member] | Regulated Operation [Member] | BHE Renewables [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		0	0	0
Regulated retail electric [Member] | Regulated Operation [Member] | Berkshire Hathaway Energy And Other [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		(1)	(2)	(1)
Non-contracts with customer revenue [Member]
Disaggregation of Revenue [Line Items]
Revenues		(475)	(534)	(601)
Non-contracts with customer revenue [Member] | PacifiCorp [Member]
Disaggregation of Revenue [Line Items]
Revenues		(98)	(82)	(136)
Non-contracts with customer revenue [Member] | MidAmerican Funding [Member]
Disaggregation of Revenue [Line Items]
Revenues		(24)	(23)	(21)
Non-contracts with customer revenue [Member] | NV Energy, Inc. [Member]
Disaggregation of Revenue [Line Items]
Revenues		(30)	(30)	(28)
Non-contracts with customer revenue [Member] | Northern Powergrid Holdings [Member]
Disaggregation of Revenue [Line Items]
Revenues		(109)	(101)	(89)
Non-contracts with customer revenue [Member] | BHE Pipeline Group [Member]
Disaggregation of Revenue [Line Items]
Revenues		(30)	(9)	(29)
Non-contracts with customer revenue [Member] | BHE Transmission [Member]
Disaggregation of Revenue [Line Items]
Revenues		0	0	0
Non-contracts with customer revenue [Member] | BHE Renewables [Member]
Disaggregation of Revenue [Line Items]
Revenues		(119)	(188)	(235)
Non-contracts with customer revenue [Member] | Berkshire Hathaway Energy And Other [Member]
Disaggregation of Revenue [Line Items]
Revenues		(65)	(101)	(121)
Electricity and natural gas [Member]
Disaggregation of Revenue [Line Items]
Revenues		(15,556)	(15,371)	(15,573)
Nevada Power Company [Member]
Disaggregation of Revenue [Line Items]
Revenues		(1,998)	(2,148)	(2,184)
Unbilled Contracts Receivable		104	109
Nevada Power Company [Member] | Regulated Operation [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		1,972	2,123	2,160
Nevada Power Company [Member] | Non-contracts with customer revenue [Member]
Disaggregation of Revenue [Line Items]
Revenues		(26)	(25)	(24)
Nevada Power Company [Member] | Regulated wholesale, transmission and other [Member] | Regulated Operation [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		62	57	53
PacifiCorp [Member]
Disaggregation of Revenue [Line Items]
Revenues		(5,341)	(5,068)	(5,026)
Unbilled Contracts Receivable		254	245
PacifiCorp [Member] | Regulated Operation [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		5,243	4,986	4,890
PacifiCorp [Member] | Other customer revenue [Member] | Regulated Operation [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		108	78	76
PacifiCorp [Member] | Regulated transmission and distribution [Member] | Regulated Operation [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		96	98	103
PacifiCorp [Member] | Regulated wholesale [Member] | Regulated Operation [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		107	99	55
PacifiCorp [Member] | Regulated retail electric [Member] | Regulated Operation [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		4,932	4,711	4,656
PacifiCorp [Member] | Regulated retail electric [Member] | Regulated Operation [Member] | Residential [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		1,910	1,783	1,737
PacifiCorp [Member] | Regulated retail electric [Member] | Regulated Operation [Member] | Commercial [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		1,578	1,522	1,513
PacifiCorp [Member] | Regulated retail electric [Member] | Regulated Operation [Member] | Industrial [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		1,185	1,176	1,172
PacifiCorp [Member] | Regulated retail electric [Member] | Regulated Operation [Member] | Other [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		259	230	234
PacifiCorp [Member] | Non-contracts with customer revenue [Member]
Disaggregation of Revenue [Line Items]
Revenues		$ (98)	$ (82)	$ (136)
[1]	The differences between the reportable segment amounts and the consolidated amounts, described as BHE and Other, relate to other corporate entities, including MidAmerican Energy Services, LLC, corporate functions and intersegment eliminations.

Revenue from Contract with Cu_4

Revenue from Contract with Customer - Real Estate Services (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 15,081	$ 14,837	$ 14,972
Revenues	20,952	19,844	19,787
Residential real estate brokerage and mortgage businesses [Member]
Disaggregation of Revenue [Line Items]
Revenues	5,396	4,473	4,214
Non-contracts with customer revenue [Member]
Disaggregation of Revenue [Line Items]
Revenues	475	534	601
HomeServices [Member]
Disaggregation of Revenue [Line Items]
Revenues	5,396	4,473	4,214
HomeServices [Member] | Residential real estate brokerage [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	4,520	4,028	3,882
HomeServices [Member] | Real estate franchise [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	76	68	67
HomeServices [Member] | Residential real estate brokerage and mortgage businesses [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	4,596	4,096	3,949
Revenues	5,396	4,473	4,214
HomeServices [Member] | Non-contracts with customer revenue [Member]
Disaggregation of Revenue [Line Items]
Revenues	$ 800	$ 377	$ 265

Revenue from Contract with Cu_5

Revenue from Contract with Customer - Remaining Performance Obligation (Details) $ in Millions	Dec. 31, 2020USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	$ 25,298
Eastern Energy Gas Holdings, LLC [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	18,648
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	$ 3,210
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	12 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-01-01 | Eastern Energy Gas Holdings, LLC [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	$ 1,575
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	12 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	$ 22,088
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01 | Eastern Energy Gas Holdings, LLC [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	$ 17,073
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period
BHE Pipeline Group [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	$ 24,651
BHE Pipeline Group [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	$ 2,563
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	12 months
BHE Pipeline Group [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	$ 22,088
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period
BHE Transmission [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	$ 647
BHE Transmission [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	$ 647
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	12 months
BHE Transmission [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	$ 0
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period

Revenue from Contract with Cu_6

Revenue from Contract with Customer - PAC (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Revenue from External Customer [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 15,081	$ 14,837	$ 14,972
Revenues	20,952	19,844	19,787
Non-contracts with customer revenue [Member]
Revenue from External Customer [Line Items]
Revenues	475	534	601
PacifiCorp [Member]
Revenue from External Customer [Line Items]
Revenues	5,341	5,068	5,026
PacifiCorp [Member] | Non-contracts with customer revenue [Member]
Revenue from External Customer [Line Items]
Revenues	98	82	136
Regulated Operation [Member]
Revenue from External Customer [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	13,553	13,433	13,612
Regulated Operation [Member] | Regulated retail electric [Member]
Revenue from External Customer [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	9,421	9,465	9,419
Regulated Operation [Member] | Regulated wholesale [Member]
Revenue from External Customer [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	366	457	501
Regulated Operation [Member] | Regulated transmission and distribution [Member]
Revenue from External Customer [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	1,779	1,819	1,846
Regulated Operation [Member] | Other customer revenue [Member]
Revenue from External Customer [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	110	2	2
Regulated Operation [Member] | PacifiCorp [Member]
Revenue from External Customer [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	5,243	4,986	4,890
Regulated Operation [Member] | PacifiCorp [Member] | Regulated retail electric [Member]
Revenue from External Customer [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	4,932	4,711	4,656
Regulated Operation [Member] | PacifiCorp [Member] | Regulated wholesale [Member]
Revenue from External Customer [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	107	99	55
Regulated Operation [Member] | PacifiCorp [Member] | Regulated transmission and distribution [Member]
Revenue from External Customer [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	96	98	103
Regulated Operation [Member] | PacifiCorp [Member] | Other customer revenue [Member]
Revenue from External Customer [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	108	78	76
Regulated Operation [Member] | PacifiCorp [Member] | Residential [Member] | Regulated retail electric [Member]
Revenue from External Customer [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	1,910	1,783	1,737
Regulated Operation [Member] | PacifiCorp [Member] | Commercial [Member] | Regulated retail electric [Member]
Revenue from External Customer [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	1,578	1,522	1,513
Regulated Operation [Member] | PacifiCorp [Member] | Industrial [Member] | Regulated retail electric [Member]
Revenue from External Customer [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	1,185	1,176	1,172
Regulated Operation [Member] | PacifiCorp [Member] | Other [Member] | Regulated retail electric [Member]
Revenue from External Customer [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 259	$ 230	$ 234

Revenue from Contract with Cu_7

Revenue from Contract with Customer - MEC (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 15,081	$ 14,837	$ 14,972
Revenues	20,952	19,844	19,787
Non-contracts with customer revenue [Member]
Disaggregation of Revenue [Line Items]
Revenues	475	534	601
MidAmerican Energy Company and Subsidiaries [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	2,696	2,902	3,028
Revenues	2,720	2,925	3,049
MidAmerican Energy Company and Subsidiaries [Member] | Regulated retail [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	2,429	2,508	2,551
MidAmerican Energy Company and Subsidiaries [Member] | Regulated retail [Member] | Residential [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	1,027	1,055	1,117
MidAmerican Energy Company and Subsidiaries [Member] | Regulated retail [Member] | Commercial [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	415	454	467
MidAmerican Energy Company and Subsidiaries [Member] | Regulated retail [Member] | Industrial [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	818	816	780
MidAmerican Energy Company and Subsidiaries [Member] | Regulated retail [Member] | Natural gas distribution, transportation-only services [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	36	38	39
MidAmerican Energy Company and Subsidiaries [Member] | Regulated retail [Member] | Other [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	133	145	148
MidAmerican Energy Company and Subsidiaries [Member] | Regulated wholesale [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	199	309	411
MidAmerican Energy Company and Subsidiaries [Member] | Electricity Transmission [Member] | Multi value transmission projects [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	60	57	55
MidAmerican Energy Company and Subsidiaries [Member] | Other customer revenue [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	8	28	11
MidAmerican Energy Company and Subsidiaries [Member] | Non-contracts with customer revenue [Member]
Disaggregation of Revenue [Line Items]
Revenues	24	23	21
Regulated Operation [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	13,553	13,433	13,612
Regulated Operation [Member] | Regulated retail electric [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	9,421	9,465	9,419
Regulated Operation [Member] | Regulated retail gas [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	619	686	737
Regulated Operation [Member] | Regulated wholesale [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	366	457	501
Regulated Operation [Member] | Other customer revenue [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	110	2	2
Corporate and Other [Member] | MidAmerican Energy Company and Subsidiaries [Member]
Disaggregation of Revenue [Line Items]
Revenues	8	28	12
Corporate and Other [Member] | Nonregulated Operation [Member] | MidAmerican Energy Company and Subsidiaries [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	8	28	11
Revenues	8	28	12
Corporate and Other [Member] | Nonregulated Operation [Member] | MidAmerican Energy Company and Subsidiaries [Member] | Other customer revenue [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	8	28	11
Corporate and Other [Member] | Nonregulated Operation [Member] | MidAmerican Energy Company and Subsidiaries [Member] | Non-contracts with customer revenue [Member]
Disaggregation of Revenue [Line Items]
Revenues	0	0	1
Electricity US Regulated | MidAmerican Energy Company and Subsidiaries [Member]
Disaggregation of Revenue [Line Items]
Revenues	2,139	2,237	2,283
Electricity US Regulated | Regulated Operation [Member] | MidAmerican Energy Company and Subsidiaries [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	2,117	2,216	2,265
Revenues	2,139	2,237	2,283
Electricity US Regulated | Regulated Operation [Member] | MidAmerican Energy Company and Subsidiaries [Member] | Regulated retail electric [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	1,924	1,938	1,915
Electricity US Regulated | Regulated Operation [Member] | MidAmerican Energy Company and Subsidiaries [Member] | Regulated retail electric [Member] | Residential [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	685	672	696
Electricity US Regulated | Regulated Operation [Member] | MidAmerican Energy Company and Subsidiaries [Member] | Regulated retail electric [Member] | Commercial [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	304	322	314
Electricity US Regulated | Regulated Operation [Member] | MidAmerican Energy Company and Subsidiaries [Member] | Regulated retail electric [Member] | Industrial [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	804	799	758
Electricity US Regulated | Regulated Operation [Member] | MidAmerican Energy Company and Subsidiaries [Member] | Regulated retail electric [Member] | Other [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	131	145	147
Electricity US Regulated | Regulated Operation [Member] | MidAmerican Energy Company and Subsidiaries [Member] | Regulated wholesale [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	133	221	295
Electricity US Regulated | Regulated Operation [Member] | MidAmerican Energy Company and Subsidiaries [Member] | Electricity Transmission [Member] | Multi value transmission projects [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	60	57	55
Electricity US Regulated | Regulated Operation [Member] | MidAmerican Energy Company and Subsidiaries [Member] | Non-contracts with customer revenue [Member]
Disaggregation of Revenue [Line Items]
Revenues	22	21	18
Natural Gas US Regulated | MidAmerican Energy Company and Subsidiaries [Member]
Disaggregation of Revenue [Line Items]
Revenues	573	660	754
Natural Gas US Regulated | Regulated Operation [Member] | MidAmerican Energy Company and Subsidiaries [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	571	658	752
Revenues	573	660	754
Natural Gas US Regulated | Regulated Operation [Member] | MidAmerican Energy Company and Subsidiaries [Member] | Regulated retail gas [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	505	570	636
Natural Gas US Regulated | Regulated Operation [Member] | MidAmerican Energy Company and Subsidiaries [Member] | Regulated retail gas [Member] | Residential [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	342	383	421
Natural Gas US Regulated | Regulated Operation [Member] | MidAmerican Energy Company and Subsidiaries [Member] | Regulated retail gas [Member] | Commercial [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	111	132	153
Natural Gas US Regulated | Regulated Operation [Member] | MidAmerican Energy Company and Subsidiaries [Member] | Regulated retail gas [Member] | Industrial [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	14	17	22
Natural Gas US Regulated | Regulated Operation [Member] | MidAmerican Energy Company and Subsidiaries [Member] | Regulated retail gas [Member] | Natural gas distribution, transportation-only services [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	36	38	39
Natural Gas US Regulated | Regulated Operation [Member] | MidAmerican Energy Company and Subsidiaries [Member] | Regulated retail gas [Member] | Other [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	2	0	1
Natural Gas US Regulated | Regulated Operation [Member] | MidAmerican Energy Company and Subsidiaries [Member] | Regulated wholesale [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	66	88	116
Natural Gas US Regulated | Regulated Operation [Member] | MidAmerican Energy Company and Subsidiaries [Member] | Non-contracts with customer revenue [Member]
Disaggregation of Revenue [Line Items]
Revenues	$ 2	$ 2	$ 2

Revenue from Contract with Cu_8

Revenue from Contract with Customer - LLC (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 15,081	$ 14,837	$ 14,972
Nonregulated Operation [Member] | Nonregulated products and services [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	1,528	1,404	1,360
Nonregulated Operation [Member] | Corporate and Other [Member] | MidAmerican Funding, LLC and Subsidiaries [Member] | Nonregulated products and services [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 8	$ 2	$ 4

Revenue from Contract with Cu_9

Revenue from Contract with Customer - NPC (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 15,081	$ 14,837	$ 14,972
Revenues	20,952	19,844	19,787
Non-contracts with customer revenue [Member]
Disaggregation of Revenue [Line Items]
Revenues	475	534	601
Regulated Operation [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	13,553	13,433	13,612
Regulated Operation [Member] | Regulated retail electric [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	9,421	9,465	9,419
Nevada Power Company [Member]
Disaggregation of Revenue [Line Items]
Revenues	1,998	2,148	2,184
Nevada Power Company [Member] | Non-contracts with customer revenue [Member]
Disaggregation of Revenue [Line Items]
Revenues	26	25	24
Nevada Power Company [Member] | Regulated Operation [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	1,972	2,123	2,160
Nevada Power Company [Member] | Regulated Operation [Member] | Regulated wholesale, transmission and other [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	62	57	53
Nevada Power Company [Member] | Regulated Operation [Member] | Fully bundled customer [Member] | Regulated retail electric [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	1,886	2,035	2,077
Nevada Power Company [Member] | Regulated Operation [Member] | Fully bundled customer [Member] | Residential [Member] | Regulated retail electric [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	1,145	1,141	1,195
Nevada Power Company [Member] | Regulated Operation [Member] | Fully bundled customer [Member] | Commercial [Member] | Regulated retail electric [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	384	441	433
Nevada Power Company [Member] | Regulated Operation [Member] | Fully bundled customer [Member] | Industrial [Member] | Regulated retail electric [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	345	433	425
Nevada Power Company [Member] | Regulated Operation [Member] | Fully bundled customer [Member] | Other [Member] | Regulated retail electric [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	12	20	24
Nevada Power Company [Member] | Regulated Operation [Member] | Distribution only service [Member] | Regulated retail electric [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	24	31	30
Nevada Power Company [Member] | Regulated Operation [Member] | Fully bundled and distribution services only customer [Member] | Regulated retail electric [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 1,910	$ 2,066	$ 2,107

Revenue from Contract with C_10

Revenue from Contract with Customer - SPPC (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 15,081	$ 14,837	$ 14,972
Revenues	20,952	19,844	19,787
Non-contracts with customer revenue [Member]
Disaggregation of Revenue [Line Items]
Revenues	475	534	601
Regulated Operation [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	13,553	13,433	13,612
Regulated Operation [Member] | Regulated retail electric [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	9,421	9,465	9,419
Regulated Operation [Member] | Regulated retail gas [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	619	686	737
Sierra Pacific Power Company [Member]
Disaggregation of Revenue [Line Items]
Revenues	854	889	855
Sierra Pacific Power Company [Member] | Non-contracts with customer revenue [Member]
Disaggregation of Revenue [Line Items]
Revenues	5	6	6
Sierra Pacific Power Company [Member] | Electricity US Regulated
Disaggregation of Revenue [Line Items]
Revenues	738	770	752
Sierra Pacific Power Company [Member] | Electricity US Regulated | Non-contracts with customer revenue [Member]
Disaggregation of Revenue [Line Items]
Revenues	3	4	4
Sierra Pacific Power Company [Member] | Natural Gas US Regulated
Disaggregation of Revenue [Line Items]
Revenues	116	119	103
Sierra Pacific Power Company [Member] | Natural Gas US Regulated | Non-contracts with customer revenue [Member]
Disaggregation of Revenue [Line Items]
Revenues	2	2	2
Sierra Pacific Power Company [Member] | Regulated Operation [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	849	883	849
Sierra Pacific Power Company [Member] | Regulated Operation [Member] | Regulated wholesale, transmission and other [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	50	57	48
Sierra Pacific Power Company [Member] | Regulated Operation [Member] | Electricity US Regulated
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	735	766	748
Sierra Pacific Power Company [Member] | Regulated Operation [Member] | Electricity US Regulated | Regulated wholesale, transmission and other [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	50	57	48
Sierra Pacific Power Company [Member] | Regulated Operation [Member] | Natural Gas US Regulated
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	114	117	101
Sierra Pacific Power Company [Member] | Regulated Operation [Member] | Natural Gas US Regulated | Regulated wholesale, transmission and other [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0	0	0
Sierra Pacific Power Company [Member] | Regulated Operation [Member] | Fully bundled customer [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	795	822	797
Sierra Pacific Power Company [Member] | Regulated Operation [Member] | Fully bundled customer [Member] | Electricity US Regulated | Regulated retail electric [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	681	705	696
Sierra Pacific Power Company [Member] | Regulated Operation [Member] | Fully bundled customer [Member] | Natural Gas US Regulated | Regulated retail gas [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	114	117	101
Sierra Pacific Power Company [Member] | Regulated Operation [Member] | Fully bundled customer [Member] | Residential [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	349	344	334
Sierra Pacific Power Company [Member] | Regulated Operation [Member] | Fully bundled customer [Member] | Residential [Member] | Electricity US Regulated | Regulated retail electric [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	273	268	267
Sierra Pacific Power Company [Member] | Regulated Operation [Member] | Fully bundled customer [Member] | Residential [Member] | Natural Gas US Regulated | Regulated retail gas [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	76	76	67
Sierra Pacific Power Company [Member] | Regulated Operation [Member] | Fully bundled customer [Member] | Commercial [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	262	275	271
Sierra Pacific Power Company [Member] | Regulated Operation [Member] | Fully bundled customer [Member] | Commercial [Member] | Electricity US Regulated | Regulated retail electric [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	233	245	246
Sierra Pacific Power Company [Member] | Regulated Operation [Member] | Fully bundled customer [Member] | Commercial [Member] | Natural Gas US Regulated | Regulated retail gas [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	29	30	25
Sierra Pacific Power Company [Member] | Regulated Operation [Member] | Fully bundled customer [Member] | Industrial [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	179	196	185
Sierra Pacific Power Company [Member] | Regulated Operation [Member] | Fully bundled customer [Member] | Industrial [Member] | Electricity US Regulated | Regulated retail electric [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	170	186	177
Sierra Pacific Power Company [Member] | Regulated Operation [Member] | Fully bundled customer [Member] | Industrial [Member] | Natural Gas US Regulated | Regulated retail gas [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	9	10	8
Sierra Pacific Power Company [Member] | Regulated Operation [Member] | Fully bundled customer [Member] | Other [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	5	7	7
Sierra Pacific Power Company [Member] | Regulated Operation [Member] | Fully bundled customer [Member] | Other [Member] | Electricity US Regulated | Regulated retail electric [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	5	6	6
Sierra Pacific Power Company [Member] | Regulated Operation [Member] | Fully bundled customer [Member] | Other [Member] | Natural Gas US Regulated | Regulated retail gas [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0	1	1
Sierra Pacific Power Company [Member] | Regulated Operation [Member] | Distribution only service [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	4	4	4
Sierra Pacific Power Company [Member] | Regulated Operation [Member] | Distribution only service [Member] | Electricity US Regulated | Regulated retail electric [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	4	4	4
Sierra Pacific Power Company [Member] | Regulated Operation [Member] | Distribution only service [Member] | Natural Gas US Regulated | Regulated retail gas [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0	0	0
Sierra Pacific Power Company [Member] | Regulated Operation [Member] | Fully bundled and distribution services only customer [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	799	826	801
Sierra Pacific Power Company [Member] | Regulated Operation [Member] | Fully bundled and distribution services only customer [Member] | Electricity US Regulated | Regulated retail electric [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	685	709	700
Sierra Pacific Power Company [Member] | Regulated Operation [Member] | Fully bundled and distribution services only customer [Member] | Natural Gas US Regulated | Regulated retail gas [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 114	$ 117	$ 101

Revenue from Contract with C_11

Revenue from Contract with Customer - EEGH (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Revenue from External Customer [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 15,081	$ 14,837	$ 14,972
Revenues	20,952	19,844	19,787
Non-contracts with customer revenue [Member]
Revenue from External Customer [Line Items]
Revenues	475	534	601
Eastern Energy Gas Holdings, LLC [Member]
Revenue from External Customer [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	2,087	2,165	2,002
Revenues	2,090	2,169	1,996
Eastern Energy Gas Holdings, LLC [Member] | Non-contracts with customer revenue [Member]
Revenue from External Customer [Line Items]
Revenues	3	4	(6)
Regulated Operation [Member]
Revenue from External Customer [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	13,553	13,433	13,612
Regulated Operation [Member] | Regulated wholesale [Member]
Revenue from External Customer [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	366	457	501
Regulated Operation [Member] | Other customer revenue [Member]
Revenue from External Customer [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	110	2	2
Regulated Operation [Member] | Regulated retail gas [Member]
Revenue from External Customer [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	619	686	737
Regulated Operation [Member] | Eastern Energy Gas Holdings, LLC [Member]
Revenue from External Customer [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	1,289	1,316	1,293
Regulated Operation [Member] | Eastern Energy Gas Holdings, LLC [Member] | Regulated wholesale [Member]
Revenue from External Customer [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	43	9	25
Regulated Operation [Member] | Eastern Energy Gas Holdings, LLC [Member] | Other customer revenue [Member]
Revenue from External Customer [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	4	7	19
Regulated Operation [Member] | Eastern Energy Gas Holdings, LLC [Member] | Regulated retail gas [Member]
Revenue from External Customer [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	1,242	1,300	1,249
Nonregulated Operation [Member] | Eastern Energy Gas Holdings, LLC [Member]
Revenue from External Customer [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 798	$ 849	$ 709

Revenue from Contract with C_12

Revenue from Contract with Customer - EEGH - Remaining Performance Obligation (Details) $ in Millions	Dec. 31, 2020USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	$ 25,298
Eastern Energy Gas Holdings, LLC [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	$ 18,648
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	12 months
Revenue, Remaining Performance Obligation, Amount	$ 3,210
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-01-01 | Eastern Energy Gas Holdings, LLC [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	12 months
Revenue, Remaining Performance Obligation, Amount	$ 1,575
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period
Revenue, Remaining Performance Obligation, Amount	$ 22,088
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01 | Eastern Energy Gas Holdings, LLC [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period
Revenue, Remaining Performance Obligation, Amount	$ 17,073

Uncategorized Items - bhe-20201

Label	Element	Value
Predecessor Equity [Member] | Eastern Energy Gas Holdings, LLC [Member]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	$ 1,361,000,000
Member Units [Member] | Eastern Energy Gas Holdings, LLC [Member]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	4,261,000,000
AOCI Attributable to Parent [Member] | Eastern Energy Gas Holdings, LLC [Member]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	(98,000,000)
Noncontrolling Interest [Member] | Eastern Energy Gas Holdings, LLC [Member]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	2,971,000,000
Cumulative Effect, Period of Adoption, Adjustment [Member] | Member Units [Member] | Eastern Energy Gas Holdings, LLC [Member]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	29,000,000
Cumulative Effect, Period of Adoption, Adjustment [Member] | AOCI Attributable to Parent [Member] | Eastern Energy Gas Holdings, LLC [Member]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	$ (26,000,000)