Midamerican Funding 10-K 21 Feb 20 2019 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2019	Jan. 31, 2020	Jun. 30, 2019
Document Information [Line Items]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	FY
Entity Registrant Name	BERKSHIRE HATHAWAY ENERGY CO
Entity Central Index Key	0001081316
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Entity Common Stock, Shares Outstanding		76,549,232
Entity Emerging Growth Company	false
Entity Small Business	false
Entity Shell Company	false
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Public Float			$ 0
PacifiCorp [Member]
Document Information [Line Items]
Entity Registrant Name	PACIFICORP /OR/
Entity Central Index Key	0000075594
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Entity Common Stock, Shares Outstanding		357,060,915
Entity Emerging Growth Company	false
Entity Small Business	false
Entity Shell Company	false
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Public Float			0
MidAmerican Funding, LLC and Subsidiaries [Domain]
Document Information [Line Items]
Entity Registrant Name	MIDAMERICAN FUNDING, LLC
Entity Central Index Key	0001098296
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Entity Emerging Growth Company	false
Entity Small Business	false
Entity Shell Company	false
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	Yes
Entity Current Reporting Status	No
Entity Public Float			0
MidAmerican Energy Company and Subsidiaries [Member]
Document Information [Line Items]
Entity Registrant Name	MIDAMERICAN ENERGY COMPANY
Entity Central Index Key	0000928576
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Entity Common Stock, Shares Outstanding		70,980,203
Entity Emerging Growth Company	false
Entity Small Business	false
Entity Shell Company	false
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Public Float			0
Nevada Power Company [Member]
Document Information [Line Items]
Entity Registrant Name	NEVADA POWER COMPANY
Entity Central Index Key	0000071180
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Entity Common Stock, Shares Outstanding		1,000
Entity Emerging Growth Company	false
Entity Small Business	false
Entity Shell Company	false
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Public Float			0
Sierra Pacific Power Company [Member]
Document Information [Line Items]
Entity Registrant Name	SIERRA PACIFIC POWER COMPANY
Entity Central Index Key	0000090144
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Entity Common Stock, Shares Outstanding		1,000
Entity Emerging Growth Company	false
Entity Small Business	false
Entity Shell Company	false
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Public Float			$ 0

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Millions		Dec. 31, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents		$ 1,040	$ 627
Trade receivables, net		1,910	2,038
Inventories		873	844
Loans Receivable Held-for-sale, Net, Not Part of Disposal Group		1,039	468
Regulatory assets		115	171
Other current assets		839	943
Total current assets		5,913	5,147
Property, plant and equipment, net		73,305	68,087
Goodwill		9,722	9,595
Finance lease right of use assets, net		504
Regulatory assets		2,766	2,896
Investments, including equity method and restricted cash and investments, noncurrent		6,255	4,903
Other assets		2,090	1,561
Total assets		100,051	92,189
Current liabilities:
Accounts payable		1,839	1,809
Accrued interest		493	469
Accrued property, income and other taxes		537	599
Employee-related Liabilities, Current		285	275
Short-term debt	[1]	3,214	2,516
Current portion of long-term debt		2,539	2,081
Regulatory liabilities		211	160
Other current liabilities		1,350	1,021
Total current liabilities		10,257	8,770
Regulatory liabilities		7,100	7,346
Deferred income taxes		9,653	9,047
Asset Retirement Obligations, Noncurrent		1,105	942
Other long-term liabilities		3,649	3,134
Total liabilities		67,473	62,466
Commitments and contingencies
Shareholders' equity:
Common stock		0	0
Additional paid-in capital		6,389	6,371
Retained earnings		28,296	25,624
Accumulated other comprehensive loss, net		(1,706)	(1,945)
Total shareholder's equity		32,449	29,593
Total liabilities and shareholder's equity		100,051	92,189
Sierra Pacific Power Company [Member]
Current assets:
Cash and cash equivalents		27	71
Trade receivables, net		109	100
Income taxes receivable		14	0
Inventories		57	52
Regulatory assets		12	7
Other current assets		20	33
Total current assets		239	263
Public Utilities, Property, Plant and Equipment, Net		3,075	2,947
Property, plant and equipment, net		3,075	2,947
Finance lease right of use assets, net		43
Regulatory assets		283	314
Other assets		74	45
Total assets		3,671	3,569
Current liabilities:
Accounts payable		103	116
Accrued interest		14	13
Accrued property, income and other taxes		12	14
Regulatory liabilities		49	18
Customer deposits		21	18
Other current liabilities		21	18
Total current liabilities		220	197
Long-term Debt, Excluding Current Maturities		1,135	1,120
Regulatory liabilities		489	491
Deferred income taxes		347	331
Asset Retirement Obligations, Noncurrent		10	10
Other long-term liabilities		160	166
Total liabilities		2,351	2,305
Shareholders' equity:
Common stock		0	0
Additional paid-in capital		1,111	1,111
Retained earnings		210	153
Accumulated other comprehensive loss, net		(1)	0
Total shareholder's equity		1,320	1,264
Total liabilities and shareholder's equity		3,671	3,569
PacifiCorp [Member]
Current assets:
Cash and cash equivalents		30	77
Receivables, Net, Current		644	640
Other Receivables, Net, Current		70	92
Inventories		394	417
Regulatory assets		63	36
Other current assets		152	133
Total current assets		1,290	1,359
Public Utilities, Property, Plant and Equipment, Net		20,973	19,570
Finance lease right of use assets, net		19
Regulatory assets		1,060	1,076
Other assets		374	308
Total assets		23,697	22,313
Current liabilities:
Accounts payable		679	597
Accrued interest		116	114
Accrued property, income and other taxes		96	75
Employee-related Liabilities, Current		75	79
Short-term debt		130	30
Current portion of long-term debt		38	350
Regulatory liabilities		56	77
Other current liabilities		170	193
Total current liabilities		1,360	1,515
Long-term Debt, Excluding Current Maturities		7,620	6,665
Regulatory liabilities		2,913	2,978
Deferred income taxes		2,563	2,543
Asset Retirement Obligations, Noncurrent		238	206
Other long-term liabilities		804	767
Total liabilities		15,260	14,468
Commitments and contingencies
Shareholders' equity:
Preferred Stock, Value, Issued		2	2
Common stock		0	0
Additional paid-in capital		4,479	4,479
Retained earnings		3,972	3,377
Accumulated other comprehensive loss, net		(16)	(13)
Total shareholder's equity		8,437	7,845
Total liabilities and shareholder's equity		23,697	22,313
MidAmerican Energy Company [Member]
Current assets:
Cash and cash equivalents		287	0
Trade receivables, net		291	367
Inventories		226	204
Other current assets		90	90
Total current assets		894	661
Public Utilities, Property, Plant and Equipment, Net		18,375	16,157
Regulatory assets		289	273
Investments, including equity method and restricted cash and investments, noncurrent		818	708
Other assets		188	121
Total assets		20,564	17,920
Current liabilities:
Accounts payable		519	575
Accrued interest		78	53
Accrued property, income and other taxes		225	300
Short-term debt		0	240
Current portion of long-term debt		0	500
Other current liabilities		219	122
Total current liabilities		1,041	1,790
Long-term Debt, Excluding Current Maturities		7,208	4,879
Regulatory liabilities		1,406	1,620
Deferred income taxes		2,626	2,322
Asset Retirement Obligations, Noncurrent		704	552
Other long-term liabilities		339	311
Total liabilities		13,324	11,474
Commitments and contingencies
Shareholders' equity:
Common stock		0	0
Additional paid-in capital		561	561
Retained earnings		6,679	5,885
Total shareholder's equity		7,240	6,446
Total liabilities and shareholder's equity		20,564	17,920
MidAmerican Funding, LLC and Subsidiaries [Domain]
Current assets:
Cash and cash equivalents		288	1
Trade receivables, net		291	365
Inventories		226	204
Other current assets		91	89
Total current assets		896	659
Property, plant and equipment, net		18,377	16,169
Goodwill		1,270	1,270
Regulatory assets		289	273
Investments, including equity method and restricted cash and investments, noncurrent		820	710
Other assets		188	121
Total assets		21,840	19,202
Current liabilities:
Accounts payable		520	575
Accrued interest		84	58
Accrued property, income and other taxes		226	300
Short-term debt		0	240
Current portion of long-term debt		0	500
Other current liabilities		219	122
Total current liabilities		1,220	1,951
Long-term Debt, Excluding Current Maturities		7,448	5,119
Regulatory liabilities		1,406	1,620
Deferred income taxes		2,621	2,319
Asset Retirement Obligations, Noncurrent		704	552
Other long-term liabilities		340	312
Total liabilities		13,739	11,873
Commitments and contingencies
Shareholders' equity:
Additional paid-in capital		1,679	1,679
Retained earnings		6,422	5,650
Total shareholder's equity		8,101	7,329
Total liabilities and shareholder's equity		21,840	19,202
Nevada Power Company [Member]
Current assets:
Cash and cash equivalents		15	111
Trade receivables, net		215	233
Inventories		62	61
Regulatory assets		1	39
Prepayments		42	51
Other current assets		29	24
Total current assets		364	519
Public Utilities, Property, Plant and Equipment, Net		6,538	6,418
Property, plant and equipment, net		6,538	6,418
Finance lease right of use assets, net		441	450
Regulatory assets		800	878
Other assets		59	37
Total assets		8,202	8,302
Current liabilities:
Accounts payable		194	187
Accrued interest		30	38
Accrued property, income and other taxes		25	30
Current portion of long-term debt		575	500
Current portion of finance lease obligations		24	20
Regulatory liabilities		93	49
Customer deposits		62	67
Other current liabilities		34	29
Total current liabilities		1,037	920
Long-term Debt, Excluding Current Maturities		1,776	1,853
Finance lease obligations		430	443
Regulatory liabilities		1,163	1,137
Deferred income taxes		714	749
Asset Retirement Obligations, Noncurrent		60	70
Other long-term liabilities		285	296
Total liabilities		5,405	5,398
Shareholders' equity:
Common stock		0	0
Additional paid-in capital		2,308	2,308
Retained earnings		493	600
Accumulated other comprehensive loss, net		(4)	(4)
Total shareholder's equity		2,797	2,904
Total liabilities and shareholder's equity		8,202	8,302
Parent Company [Member]
Current assets:
Cash and cash equivalents		13	9
Income taxes receivable		3	103
Other current assets		8	15
Total current assets		292	383
Goodwill		1,221	1,221
Other assets		695	546
Total assets		43,712	40,331
Current liabilities:
Short-term debt		1,590	983
Total current liabilities		2,374	1,494
Other long-term liabilities		530	543
Total liabilities		11,237	10,715
Shareholders' equity:
Common stock		0	0
Additional paid-in capital		6,389	6,371
Retained earnings		28,296	25,624
Accumulated other comprehensive loss, net		(1,706)	(1,945)
Total shareholder's equity		32,449	29,593
Total liabilities and shareholder's equity		43,712	40,331
Deferred Income Tax Charge [Member] | MidAmerican Energy Company [Member]
Current liabilities:
Regulatory liabilities	[2]	$ 478	$ 626
[1]	(1)The table does not include unused credit facilities and letters of credit for investments that are accounted for under the equity method.
[2]	Amount represents the excess of nuclear decommission trust assets over the related asset retirement obligation. Refer to Note 11 for a discussion of asset retirement obligations.

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - $ / shares	Dec. 31, 2019	Dec. 31, 2018
Shareholders' equity:
Common stock, par value	$ 0	$ 0
Common stock, shares authorized	115,000,000	115,000,000
Common stock, shares issued	77,000,000	77,000,000
Common stock, shares outstanding	77,000,000	77,000,000
PacifiCorp [Member]
Shareholders' equity:
Common stock, par value	$ 0	$ 0
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
Nevada Power Company [Member]
Shareholders' equity:
Common Stock, stated value per share	$ 1	$ 1
Common stock, shares authorized	1,000	1,000
Common stock, shares issued	1,000	1,000
Common stock, shares outstanding	1,000	1,000
Sierra Pacific Power Company [Member]
Shareholders' equity:
Common Stock, stated value per share	$ 3.75	$ 3.75
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 [Member]
Shareholders' equity:
Common stock, shares outstanding	77,000,000	77,000,000
Common Stock [Member] | MidAmerican Energy Company [Member]
Shareholders' equity:
Common Stock, stated value per share	$ 0	$ 0
Common stock, shares authorized	350,000,000	350,000,000
Common stock, shares issued	70,980,203	70,980,203
Common stock, shares outstanding	70,980,203	70,980,203
Common Stock [Member] | Nevada Power Company [Member]
Shareholders' equity:
Common stock, shares outstanding	1,000	1,000
Common Stock [Member] | Sierra Pacific Power Company [Member]
Shareholders' equity:
Common stock, shares outstanding	1,000	1,000

Consolidated Statements of Oper

Consolidated Statements of Operations - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Operating revenue:
Total operating revenue	$ 19,844	$ 19,787	$ 18,614
Energy:
Cost of fuel and energy	4,586	4,769	4,518
Operations and maintenance	3,318	3,440	3,210
Depreciation and amortization	2,965	2,933	2,580
Total operating expenses	15,694	15,715	14,092
Taxes, Miscellaneous	574	573	555
Real estate	4,251	4,000	3,229
Operating income	4,150	4,072	4,522
Other income (expense):
Interest expense	(1,912)	(1,838)	(1,841)
Capitalized interest and allowance for borrowed funds	77	61	45
Allowance for equity funds	173	104	76
Other Interest and Dividend Income	117	113	111
Gain (Loss) on Investments	(288)	(538)	14
Other, net	97	(9)	(420)
Total other income (expense)	(1,736)	(2,107)	(2,015)
Income before income tax benefit and equity (loss) income	2,414	1,965	2,507
Income tax benefit	(598)	(583)	(554)
Equity income (loss)	(44)	43	(151)
Net income	2,968	2,591	2,910
Net income attributable to noncontrolling interests	18	23	40
Net income (loss) attributable to parent	2,950	2,568	2,870
Electricity and natural gas [Member]
Operating revenue:
Total operating revenue	15,371	15,573	15,171
Residential real estate brokerage and mortgage businesses [Member]
Operating revenue:
Total operating revenue	4,473	4,214	3,443
PacifiCorp [Member]
Operating revenue:
Total operating revenue	5,068	5,026	5,237
Energy:
Cost of fuel and energy	1,795	1,757	1,770
Operations and maintenance	1,048	1,038	1,034
Utilities Operating Expense, Depreciation and Amortization	954	979	796
Property and other taxes	199	201	197
Total operating costs and expenses	3,996	3,975	3,797
Operating income	1,072	1,051	1,440
Other income (expense):
Interest expense	(401)	(384)	(381)
Capitalized interest and allowance for borrowed funds	36	18	11
Allowance for equity funds	72	35	20
Investment Income, Interest and Dividend	21	15	11
Other, net	32	8	27
Total other income (expense)	(240)	(308)	(312)
Income before income tax benefit and equity (loss) income	832	743	1,128
Income tax benefit	61	5	360
Net income (loss) attributable to parent	771	738	768
MidAmerican Energy Company [Member]
Operating revenue:
Total operating revenue	2,925	3,049	2,837
Energy:
Operations and maintenance	800	811	799
Utilities Operating Expense, Depreciation and Amortization	639	609	500
Property and other taxes	126	125	119
Total operating expenses	2,377	2,498	2,294
Operating income	548	551	543
Other income (expense):
Interest expense	(281)	(227)	(214)
Capitalized interest and allowance for borrowed funds	27	20	15
Allowance for equity funds	78	53	41
Other, net	50	30	37
Total other income (expense)	(126)	(124)	(121)
Income before income tax benefit and equity (loss) income	422	427	422
Income tax benefit	(371)	(255)	(183)
Net income (loss) attributable to parent	793	682	605
MidAmerican Energy Company [Member] | Electricity, US Regulated [Member]
Operating revenue:
Total operating revenue	2,237	2,283	2,108
Energy:
Cost of fuel and energy	399	487	434
MidAmerican Energy Company [Member] | Regulated natural gas and other [Member]
Operating revenue:
Total operating revenue	688	766	729
Energy:
Cost of fuel and energy	413	466	442
MidAmerican Funding, LLC and Subsidiaries [Domain]
Operating revenue:
Total operating revenue	2,927	3,053	2,846
Energy:
Operations and maintenance	801	813	802
Utilities Operating Expense, Depreciation and Amortization	639	609	500
Property and other taxes	127	125	119
Total operating expenses	2,378	2,503	2,302
Operating income	549	550	544
Other income (expense):
Interest expense	(302)	(247)	(237)
Capitalized interest and allowance for borrowed funds	27	20	15
Allowance for equity funds	78	53	41
Other, net	52	31	9
Total other income (expense)	(145)	(143)	(172)
Income before income tax benefit and equity (loss) income	404	407	372
Income tax benefit	(377)	(262)	(202)
Net income (loss) attributable to parent	781	669	574
MidAmerican Funding, LLC and Subsidiaries [Domain] | Electricity, US Regulated [Member]
Operating revenue:
Total operating revenue	2,237	2,283	2,108
Energy:
Cost of fuel and energy	399	487	434
MidAmerican Funding, LLC and Subsidiaries [Domain] | Regulated natural gas and other [Member]
Operating revenue:
Total operating revenue	690	770	738
Energy:
Cost of fuel and energy	412	469	447
Nevada Power Company [Member]
Operating revenue:
Total operating revenue	2,148	2,184	2,206
Energy:
Cost of fuel and energy	943	917	902
Operations and maintenance	324	443	391
Utilities Operating Expense, Depreciation and Amortization	357	337	308
Property and other taxes	45	41	40
Total operating expenses	1,669	1,738	1,641
Operating income	479	446	565
Other income (expense):
Interest expense	(171)	(170)	(179)
Capitalized interest and allowance for borrowed funds	3	2	1
Allowance for equity funds	5	3	1
Other, net	21	17	23
Total other income (expense)	(142)	(148)	(154)
Income before income tax benefit and equity (loss) income	337	298	411
Income tax benefit	73	72	156
Net income (loss) attributable to parent	264	226	255
Sierra Pacific Power Company [Member]
Operating revenue:
Total operating revenue	889	855	812
Energy:
Operations and maintenance	172	190	167
Utilities Operating Expense, Depreciation and Amortization	125	119	114
Property and other taxes	22	23	24
Total operating expenses	718	703	615
Operating income	171	152	197
Other income (expense):
Interest expense	(48)	(44)	(43)
Capitalized interest and allowance for borrowed funds	1	1	2
Allowance for equity funds	3	4	3
Other, net	4	9	5
Total other income (expense)	(40)	(30)	(33)
Income before income tax benefit and equity (loss) income	131	122	164
Income tax benefit	28	30	55
Net income (loss) attributable to parent	103	92	109
Sierra Pacific Power Company [Member] | Electricity, US Regulated [Member]
Operating revenue:
Total operating revenue	770	752	713
Energy:
Cost of fuel and energy	337	322	268
Sierra Pacific Power Company [Member] | Natural Gas, US Regulated [Member]
Operating revenue:
Total operating revenue	119	103	99
Energy:
Cost of fuel and energy	$ 62	$ 49	$ 42

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Net income	$ 2,968	$ 2,591	$ 2,910
Net income (loss) attributable to parent	2,950	2,568	2,870
Other comprehensive income (loss), net of tax:
Unrecognized amounts on retirement benefits, net of tax	(59)	25	64
Foreign currency translation adjustment	327	(494)	546
Unrealized gains (losses) on available-for-sale securities, net of tax	0	0	500
Unrealized (losses) gains on cash flow hedges, net of tax	(29)	7	3
Total other comprehensive income (loss), net of tax	239	(462)	1,113
Comprehensive income	3,207	2,129	4,023
Comprehensive income attributable to noncontrolling interests	18	23	40
Comprehensive income attributable to shareholders	3,189	2,106	3,983
Parent Company [Member]
Net income	2,954	2,571	2,873
Net income (loss) attributable to parent	2,951	2,568	2,870
Other comprehensive income (loss), net of tax:
Total other comprehensive income (loss), net of tax	239	(462)	1,113
Comprehensive income	3,193	2,109	3,986
Comprehensive income attributable to noncontrolling interests	3	3	3
Comprehensive income attributable to shareholders	3,190	2,106	3,983
Nevada Power Company [Member]
Net income (loss) attributable to parent	264	226	255
PacifiCorp [Member]
Net income (loss) attributable to parent	771	738	768
Other comprehensive income (loss), net of tax:
Unrecognized amounts on retirement benefits, net of tax	(3)	2	(3)
Total other comprehensive income (loss), net of tax	(4)	2	(3)
Comprehensive income attributable to shareholders	768	740	765
MidAmerican Energy Company [Member]
Net income (loss) attributable to parent	793	682	605
Other comprehensive income (loss), net of tax:
Unrealized gains (losses) on available-for-sale securities, net of tax	0	0	0
Comprehensive income attributable to shareholders	793	682	605
MidAmerican Funding, LLC and Subsidiaries [Domain]
Net income (loss) attributable to parent	781	669	574
Other comprehensive income (loss), net of tax:
Unrealized gains (losses) on available-for-sale securities, net of tax	0	0	0
Comprehensive income attributable to shareholders	$ 781	$ 669	$ 574

Consolidated Statements of Co_2

Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income tax effect - unrecognized amounts on retirement benefits	$ 8	$ 9	$ 11
Income tax effect - unrealized gains (losses) on available-for-sale securities	0	270	(19)
Income tax effect - unrealized (losses) gains on cash flow hedges	1	(7)	13
MidAmerican Funding, LLC and Subsidiaries [Domain]
Income tax effect - unrealized gains (losses) on available-for-sale securities	0	0	0
MidAmerican Energy Company [Member]
Income tax effect - unrealized gains (losses) on available-for-sale securities	0	0	0
PacifiCorp [Member]
Income tax effect - unrecognized amounts on retirement benefits	$ (1)	$ 1	$ 3

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]	Accumulated Other Comprehensive Income (Loss) [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 [Domain]	MidAmerican Funding, LLC and Subsidiaries [Domain]Additional Paid-in Capital [Member]	MidAmerican Funding, LLC and Subsidiaries [Domain]Retained Earnings [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]	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]
Balance at Dec. 31, 2015								$ 7,503
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss) attributable to parent								763
Balance (shares) at Dec. 31, 2016		77,000,000																				1,000					1,000
Balance at Dec. 31, 2016	$ 24,463	$ 0	$ 6,390	$ 19,448	$ (1,511)	$ 136
Balance at Dec. 31, 2016								7,390	$ 2	$ 0	$ 4,479	$ 2,921	$ (12)	$ 5,160	$ 0	$ 561	$ 4,599	$ 6,086	$ 1,679	$ 4,407	$ 1,108	$ 0	$ 1,111	$ (2)	$ (1)	$ 2,972	$ 0	$ 2,308	$ 667	$ (3)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	2,892	0	0	2,870	0	22
Net income	2,910
Net income (loss) attributable to parent	2,870							768		0	0	768	0	605			605	574		574	109			109		255			255
Other Comprehensive Income (Loss), Net of Tax	1,113	0	0	0	1,113	0		(3)		0	0	0	(3)
Distributions	(22)	0	0	0	0	(22)
Common stock dividends declared								(600)		0	0	(600)	0								(45)			(45)		(548)			(548)
Common stock, value, repurchased	(19)		(1)	(18)
Conversion of Stock, Amount Converted	(100)		(6)	(94)
Other equity transactions	(19)	$ 0	(15)	0	0	(4)								(1)			(1)									(1)				(1)
Balance (shares) at Dec. 31, 2017		77,000,000																				1,000					1,000
Balance at Dec. 31, 2017	28,308	$ 0	6,368	22,206	(398)	132
Balance at Dec. 31, 2017								7,555	2	0	4,479	3,089	(15)	5,764	$ 0	561	5,203	6,660	1,679	4,981	1,172	$ 0	1,111	62	(1)	2,678	$ 0	2,308	374	(4)
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification				1,085	(1,085)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	2,588	0	0	2,568	0	20
Net income	2,591
Net income (loss) attributable to parent	2,568							738		0	0	738	0	682			682	669		669	92			92		$ 226			226
Other Comprehensive Income (Loss), Net of Tax	(462)	0	0	0	(462)	0		2		0	0	0	2
Reclassification of long-term income tax receivable	(609)
Long-term income tax receivable adjustments	17			(135)			$ 152
Distributions	(23)	0	0	0	0	(23)
Common stock dividends declared								$ (450)		0	0	(450)	0
Common stock, value, repurchased	(107)		(6)	(101)
Other equity transactions	$ 11	$ 0	9	1	0	1															$ 0			(1)	1
Balance (shares) at Dec. 31, 2018	77,000,000	77,000,000						357,000,000							70,980,203						1,000	1,000				1,000	1,000
Balance at Dec. 31, 2018	$ 29,723	$ 0	6,371	25,624	(1,945)	130
Balance at Dec. 31, 2018	29,593							$ 7,845	2	0	4,479	3,377	(13)	6,446	$ 0	561	5,885	7,329	1,679	5,650	$ 1,264	$ 0	1,111	153	0	$ 2,904	$ 0	2,308	600	(4)
Long-term income tax receivable	(457)						(457)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	2,968	0	0	2,950		18
Net income	2,968
Net income (loss) attributable to parent	2,950							771		0	0	771	0	793			793	781		781	103			103		264			264
Other Comprehensive Income (Loss), Net of Tax	239	0	0	0	239	0		(4)		0	0	(1)	(3)
Distribution to parent																		(8)		(8)
Reclassification of long-term income tax receivable							(609)
Long-term income tax receivable adjustments	(40)		33	0			(73)
Common stock dividends declared								$ (175)		0	0	(175)	0								(46)			(46)		$ (371)			(371)
Common stock, value, repurchased	(293)	0	(15)	(278)	0	0
Conversion of Stock, Amount Converted	(22)	0		0	0	(22)
Other equity transactions	$ 3	$ 0		0	0	3								1			1	(1)		(1)	$ (1)				(1)
Balance (shares) at Dec. 31, 2019	77,000,000	77,000,000						357,000,000							70,980,203						1,000	1,000				1,000	1,000
Balance at Dec. 31, 2019	$ 32,578	$ 0	$ 6,389	$ 28,296	$ (1,706)	$ 129
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	$ 1,320	$ 0	$ 1,111	$ 210	$ (1)	$ 2,797	$ 0	$ 2,308	$ 493	$ (4)
Long-term income tax receivable	$ (530)						$ (530)

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Cash flows from operating activities:
Net income	$ 2,968	$ 2,591	$ 2,910
Net income (loss) attributable to parent	2,950	2,568	2,870
Adjustments to reconcile net income to net cash flows from operating activities:
Gain (Loss) on Investments	288	538	(14)
Other Nonrecurring (Income) Expense	43	56	455
Depreciation and amortization	3,011	2,984	2,646
Allowance for equity funds	(173)	(104)	(76)
Changes in regulatory assets and liabilities	153	196	31
Deferred income taxes and amortization of investment tax credits	290	8	19
Equity (income) loss, net of distributions	44	(43)	151
Income (Loss) from Equity Method Investments, Net of Dividends or Distributions	93	45	260
Other, net	23	67	12
Changes in other operating assets and liabilities, net of effects from acquisitions:
Trade receivables and other assets	(372)	72	(74)
Derivative collateral, net	(25)	27	(22)
Pension and other postretirement benefit plans	(51)	(54)	(91)
Accrued property, income and other taxes	(16)	199	(28)
Accounts payable and other liabilities	(26)	145	50
Net cash flows from operating activities	6,206	6,770	6,078
Cash flows from investing activities:
Capital expenditures	(7,364)	(6,241)	(4,571)
Acquisitions, net of cash acquired	(27)	(106)	(1,113)
Purchases of marketable securities	(262)	(329)	(190)
Proceeds from sales of marketable securities	238	287	202
Equity method investments	(1,617)	(683)	(395)
Other, net	69	83	(12)
Net cash flows from investing activities	(8,963)	(6,989)	(6,079)
Cash flows from financing activities:
Proceeds from BHE senior debt	0	3,166	0
Repayments of BHE senior debt and junior subordinated debentures	0	(1,045)	(2,323)
Payments for Repurchase of Common Stock	(293)	(107)	(19)
Proceeds from subsidiary debt	4,699	2,352	1,763
Repayments of subsidiary debt	(1,914)	(2,422)	(1,000)
Net proceeds from (repayments of) short-term debt	684	(1,946)	2,361
Payment for Debt Extinguishment or Debt Prepayment Cost	0	0	(435)
Business acquisition, acquisition of remaining noncontrolling interest	0	(131)	0
Other, net	(52)	(41)	(73)
Net cash flows from financing activities	3,124	(174)	274
Effect of exchange rate changes	18	(7)	7
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect	385	(400)	280
Cash and cash equivalents and restricted cash and cash equivalents at end of period	883	1,283	1,003
Cash and cash equivalents and restricted cash and cash equivalents at end of period	1,268	883	1,283
Parent Company [Member]
Cash flows from operating activities:
Net income	2,954	2,571	2,873
Net income (loss) attributable to parent	2,951	2,568	2,870
Adjustments to reconcile net income to net cash flows from operating activities:
Depreciation and amortization	5	4	4
Equity (income) loss, net of distributions	(3,419)	(3,058)	(3,441)
Changes in other operating assets and liabilities, net of effects from acquisitions:
Net cash flows from operating activities	1,780	1,885	2,450
Cash flows from investing activities:
Investments in subsidiaries	1,972	1,791	1,566
Purchases of marketable securities	(42)	(44)	(71)
Proceeds from sales of marketable securities	42	45	68
Repayment of (Issuance of) Notes Receivable with Related Parties, Net	(112)	(72)	(305)
Other, net	(5)	(22)	(8)
Net cash flows from investing activities	(2,089)	(1,884)	(1,882)
Cash flows from financing activities:
Proceeds from BHE senior debt	0	3,166	0
Payments for Repurchase of Common Stock	(293)	(107)	(19)
Net proceeds from (repayments of) short-term debt	607	(2,348)	2,498
Payment for Debt Extinguishment or Debt Prepayment Cost	0	0	(406)
Other, net	(1)	(4)	(5)
Net cash flows from financing activities	313	(338)	(255)
Net change in cash and cash equivalents and restricted cash and cash equivalents	4	(337)	313
MidAmerican Energy Company [Member]
Cash flows from operating activities:
Net income (loss) attributable to parent	793	682	605
Adjustments to reconcile net income to net cash flows from operating activities:
Utilities Operating Expense, Depreciation and Amortization	639	609	500
Allowance for equity funds	(78)	(53)	(41)
Amortization of Utility Plant to Other Operating Expense	33	34	34
Deferred income taxes and amortization of investment tax credits	154	33	332
Other, net	(9)	13	(15)
Changes in other operating assets and liabilities, net of effects from acquisitions:
Trade receivables and other assets	60	(25)	(60)
Inventories	(22)	41	19
Derivative collateral, net	(1)	(1)	2
Pension and other postretirement benefit plans	(10)	(13)	(11)
Accrued property, income and other taxes	(76)	218	(41)
Accounts payable and other liabilities	7	(30)	72
Net cash flows from operating activities	1,490	1,508	1,396
Cash flows from investing activities:
Capital expenditures	(2,810)	(2,332)	(1,773)
Purchases of marketable securities	(156)	(263)	(143)
Proceeds from sales of marketable securities	138	223	137
Proceeds from Sales of Business, Affiliate and Productive Assets	1	17	2
Other investment proceeds	13	15	1
Other, net	13	30	0
Net cash flows from investing activities	(2,801)	(2,310)	(1,776)
Cash flows from financing activities:
Proceeds from Issuance of Long-term Debt	2,326	687	990
Net proceeds from (repayments of) short-term debt	(240)	240	(99)
Repayments of Long-term Debt	(500)	(350)	(255)
Other, net	(1)	(1)	0
Net cash flows from financing activities	1,585	576	636
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect	274	(226)	256
Cash and cash equivalents and restricted cash and cash equivalents at end of period	56	282	26
Cash and cash equivalents and restricted cash and cash equivalents at end of period	330	56	282
PacifiCorp [Member]
Cash flows from operating activities:
Net income (loss) attributable to parent	771	738	768
Adjustments to reconcile net income to net cash flows from operating activities:
Utilities Operating Expense, Depreciation and Amortization	954	979	796
Allowance for equity funds	(72)	(35)	(20)
Changes in regulatory assets and liabilities	(55)	87	18
Deferred income taxes and amortization of investment tax credits	(131)	(199)	70
Other, net	20	5	9
Changes in other operating assets and liabilities, net of effects from acquisitions:
Trade receivables and other assets	14	62	67
Inventories	23	16	10
Derivative collateral, net	12	15	(6)
Accrued property, income and other taxes	22	60	(48)
Accounts payable and other liabilities	(11)	83	(62)
Net cash flows from operating activities	1,547	1,811	1,602
Cash flows from investing activities:
Capital expenditures	(2,175)	(1,257)	(769)
Other, net	11	5	12
Net cash flows from investing activities	(2,164)	(1,252)	(757)
Cash flows from financing activities:
Proceeds from Issuance of Long-term Debt	989	593	0
Net proceeds from (repayments of) short-term debt	100	(50)	(190)
Repayments of Long-term Debt	(350)	(586)	(52)
Common stock dividends	(175)	(450)	(600)
Other, net	(3)	(3)	(7)
Net cash flows from financing activities	561	(496)	(849)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect	(56)	63	(4)
Cash and cash equivalents and restricted cash and cash equivalents at end of period	92	29	33
Cash and cash equivalents and restricted cash and cash equivalents at end of period	36	92	29
MidAmerican Funding, LLC and Subsidiaries [Domain]
Cash flows from operating activities:
Net income (loss) attributable to parent	781	669	574
Adjustments to reconcile net income to net cash flows from operating activities:
Other Nonrecurring (Income) Expense	0	0	29
Utilities Operating Expense, Depreciation and Amortization	639	609	500
Allowance for equity funds	(78)	(53)	(41)
Amortization of Utility Plant to Other Operating Expense	33	34	34
Deferred income taxes and amortization of investment tax credits	152	32	334
Other, net	(8)	16	(14)
Changes in other operating assets and liabilities, net of effects from acquisitions:
Trade receivables and other assets	56	(19)	(62)
Inventories	(22)	41	19
Derivative collateral, net	(1)	(1)	2
Pension and other postretirement benefit plans	(10)	(13)	(11)
Accrued property, income and other taxes	(74)	230	(54)
Accounts payable and other liabilities	7	(29)	70
Net cash flows from operating activities	1,475	1,516	1,380
Cash flows from investing activities:
Capital expenditures	(2,810)	(2,332)	(1,773)
Purchases of marketable securities	(156)	(263)	(143)
Proceeds from sales of marketable securities	138	223	137
Proceeds from Sales of Business, Affiliate and Productive Assets	1	17	2
Other investment proceeds	13	15	1
Other, net	13	30	(3)
Net cash flows from investing activities	(2,801)	(2,310)	(1,779)
Cash flows from financing activities:
Proceeds from Issuance of Long-term Debt	2,326	687	990
Net proceeds from (repayments of) short-term debt	(240)	240	(99)
Payment for Debt Extinguishment or Debt Prepayment Cost	0	0	(29)
Repayments of Long-term Debt	(500)	(350)	(341)
Increase (Decrease) in Notes Payable, Related Parties, Current	15	(8)	133
Other, net	(1)	0	0
Net cash flows from financing activities	1,600	569	654
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect	274	(225)	255
Cash and cash equivalents and restricted cash and cash equivalents at end of period	57	282	27
Cash and cash equivalents and restricted cash and cash equivalents at end of period	331	57	282
Nevada Power Company [Member]
Cash flows from operating activities:
Net income (loss) attributable to parent	264	226	255
Adjustments to reconcile net income to net cash flows from operating activities:
Other Nonrecurring (Income) Expense	1	0	(1)
Utilities Operating Expense, Depreciation and Amortization	357	337	308
Allowance for equity funds	(5)	(3)	(1)
Changes in regulatory assets and liabilities	27	83	50
Deferred income taxes and amortization of investment tax credits	(32)	(13)	94
Deferred Energy Change	51	(11)	(16)
Amortization of deferred energy	43	16	16
Other, net	(6)	14	(3)
Changes in other operating assets and liabilities, net of effects from acquisitions:
Trade receivables and other assets	19	5	6
Inventories	1	(1)	6
Accrued property, income and other taxes	(13)	(35)	(26)
Accounts payable and other liabilities	(6)	1	(23)
Net cash flows from operating activities	701	619	665
Cash flows from investing activities:
Capital expenditures	(409)	(298)	(270)
Acquisitions	0	0	(77)
Proceeds from sale of assets	2	1	4
Net cash flows from investing activities	(407)	(297)	(343)
Cash flows from financing activities:
Proceeds from Issuance of Long-term Debt	495	573	91
Repayments of Long-term Debt	(500)	(824)	(75)
Common stock dividends	(371)	0	(548)
Other, net	14	16	14
Net cash flows from financing activities	(390)	(267)	(546)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect	(96)	55	(224)
Cash and cash equivalents and restricted cash and cash equivalents at end of period	121	66	290
Cash and cash equivalents and restricted cash and cash equivalents at end of period	25	121	66
Sierra Pacific Power Company [Member]
Cash flows from operating activities:
Net income (loss) attributable to parent	103	92	109
Adjustments to reconcile net income to net cash flows from operating activities:
Other Nonrecurring (Income) Expense	1	0	0
Utilities Operating Expense, Depreciation and Amortization	125	119	114
Allowance for equity funds	(3)	(4)	(4)
Changes in regulatory assets and liabilities	25	42	17
Deferred income taxes and amortization of investment tax credits	9	7	55
Deferred Energy Change	15	9	(20)
Amortization of deferred energy	(2)	(10)	(47)
Other, net	(1)	0	(4)
Changes in other operating assets and liabilities, net of effects from acquisitions:
Trade receivables and other assets	(6)	3	4
Inventories	(5)	(4)	(3)
Accrued property, income and other taxes	(16)	3	1
Accounts payable and other liabilities	(8)	18	(41)
Net cash flows from operating activities	237	275	181
Cash flows from investing activities:
Capital expenditures	(248)	(205)	(186)
Proceeds from sale of assets	1	0	0
Net cash flows from investing activities	(247)	(205)	(186)
Cash flows from financing activities:
Proceeds from Issuance of Long-term Debt	125	0	0
Repayments of Long-term Debt	(109)	0	0
Common stock dividends	(46)	0	(45)
Other, net	(4)	(2)	(2)
Net cash flows from financing activities	(34)	(2)	(47)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect	(44)	68	(52)
Cash and cash equivalents and restricted cash and cash equivalents at end of period	76	8	60
Cash and cash equivalents and restricted cash and cash equivalents at end of period	$ 32	$ 76	$ 8

Schedule I Condensed Balance Sh

Schedule I Condensed Balance Sheets (Paranthetical) - $ / shares shares in Millions	Dec. 31, 2019	Dec. 31, 2018
Condensed Financial Statements, Captions [Line Items]
Common stock, par value	$ 0	$ 0
Common stock, shares authorized	115	115
Common stock, shares issued	77	77
Common stock, shares outstanding	77	77
Parent Company [Member]
Condensed Financial Statements, Captions [Line Items]
Common stock, par value	$ 0	$ 0
Common stock, shares authorized	115	115
Common stock, shares issued	77	77
Common stock, shares outstanding	77	77

Organization and Operations (No

Organization and Operations (Notes)	12 Months Ended
	Dec. 31, 2019
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 , MidAmerican Funding, LLC (" MidAmerican Funding ") (which primarily consists of MidAmerican Energy Company (" MidAmerican Energy ")), NV Energy, Inc. (" NV Energy ") (which primarily consists of Nevada Power Company (" Nevada Power ") and Sierra Pacific Power Company (" Sierra Pacific ")), Northern Powergrid Holdings Company (" Northern Powergrid ") (which primarily consists of Northern Powergrid (Northeast) Limited and Northern Powergrid (Yorkshire) plc), BHE Pipeline Group (which consists of 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 and HomeServices of America, Inc. (collectively with 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, two interstate natural gas pipeline companies 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	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 [Domain]
Segment Reporting Information [Line Items]
Organization and Operations	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 , 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 Operations Sierra 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 (" 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").

Summary of Significant Accounti

Summary of Significant Accounting Policies (Notes)	12 Months Ended
	Dec. 31, 2019
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. 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, 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 Doubtful Accounts Trade receivables are stated at the outstanding principal amount, net of an estimated allowance for doubtful accounts. The allowance for doubtful accounts 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. As of December 31, 2019 and 2018 , the allowance for doubtful accounts totaled $44 million and $42 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 $257 million and $273 million as of December 31, 2019 and 2018 , respectively, and materials and supplies totaling $616 million and $571 million as of December 31, 2019 and 2018 , 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 $2 million and $14 million higher as of December 31, 2019 and 2018 , 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 lease obligations and corresponding right-of-use assets 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 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. The right-of-use assets and lease liabilities for finance leases as of December 31, 2018 have been reclassified from property, plant and equipment, net and current portion of long-term and subsidiary debt, respectively, to conform to the current period presentation. 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 the reporting unit. 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. 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; 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 2019 , 2018 and 2017 , 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, 2019 and 2018 , trade receivables, net on the Consolidated Balance Sheets relate substantially to Customer Revenue, including unbilled revenue of $638 million and $554 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 Accounting Standards Codification ("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 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 and acquisition 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 estimated 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 in most state and provincial 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. 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. 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 t
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 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 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, 2019 and 2018 , 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 Accounts receivable are stated at the outstanding principal amount, net of an estimated allowance for doubtful accounts. The allowance for doubtful accounts 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. As of December 31, 2019 and 2018 , the allowance for doubtful accounts totaled $8 million and is included in trade receivables, net on the Consolidated Balance Sheets. 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 represent 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 lease obligations and corresponding right-of-use assets 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 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 , 2019 and 2018 , trade receivables, net on the Consolidated Balance Sheets relate substantially to Customer Revenue, including unbilled revenue of $245 million and $229 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. 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 estimated 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 $11 million and $13 million as of December 31, 2019 and 2018 , 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. 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. Segment Information PacifiCorp currently has one segment, which includes its regulated electric utility operations. New Accounting Pronouncements In February 2016, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") No. 2016-02, which creates FASB Accounting Standards Codification ("ASC") Topic 842, "Leases" and supersedes Topic 840 "Leases." This guidance increases transparency and comparability among entities by recording lease assets and lease liabilities on the balance sheet and disclosing key information about leasing arrangements. A lessee should recognize on the balance sheet a liability to make lease payments (the lease liability) and a right-of-use asset representing its right to use the underlying asset for the lease term. The recognition, measurement and presentation of expenses and cash flows arising from a lease by a lessee have not significantly changed from previous guidance. Following the issuance of ASU No. 2016-02, the FASB issued several ASUs that clarified the implementation guidance for ASU No. 2016-02 but did not change the core principle of the guidance. PacifiCorp has elected to utilize various practical expedients available to adopt ASU No. 2016-02, including (1) the package of three not requiring a reassessment of (i) whether any expired or existing contracts are or contain leases; (ii) the lease classification for any expired or existing leases; and (iii) initial direct costs for any existing leases; (2) using hindsight in determining the lease term; and (3) not requiring a reassessment of whether existing or expired land easements that were not previously accounted for as leases under ASC Topic 840 are or contain a lease under ASC Topic 842. PacifiCorp adopted this guidance for all applicable contracts in effect as of January 1, 2019 under a modified retrospective method and the adoption did not have a cumulative effect impact at the date of initial adoption.
MidAmerican Energy 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, 2019 , 2018 and 2017 . 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 cash and cash equivalents consist substantially of funds restricted for the purpose of constructing solid waste facilities under tax exempt bond agreements. 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 Doubtful Accounts Receivables are stated at the outstanding principal amount, net of an estimated allowance for doubtful accounts. The allowance for doubtful accounts 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. As of December 31, 2019 and 2018 , the allowance for doubtful accounts totaled $5 million and $7 million , respectively, and is included in 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 coal stocks, totaling $66 million and $51 million as of December 31, 2019 and 2018 , respectively, materials and supplies, totaling $128 million and $124 million as of December 31, 2019 and 2018 , respectively, and natural gas in storage, totaling $28 million and $24 million as of December 31, 2019 and 2018 , 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 $2 million lower and $14 million higher as of December 31, 2019 and 2018 , 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 this arrangement 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, 2019 and 2018 , unbilled revenue was $91 million and $88 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 receivables at December 31, 2019 and 2018 , was $56 million . 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 estimated 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. 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. New Accounting Pronouncements In February 2016, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") No. 2016-02, which creates FASB Accounting Standards Codification ("ASC") Topic 842, "Leases" and supersedes Topic 840 "Leases." This guidance increases transparency and comparability among entities by recording lease assets and lease liabilities on the balance sheet and disclosing key information about leasing arrangements. A lessee should recognize on the balance sheet a liability to make lease payments (the lease liability) and a right-of-use asset representing its right to use the underlying asset for the lease term. The recognition, measurement and presentation of expenses and cash flows arising from a lease by a lessee have not significantly changed from previous guidance. Following the issuance of ASU No. 2016-02, the FASB issued several ASUs that clarified the implementation guidance for ASU No. 2016-02 but did not change the core principle of the guidance. MidAmerican Energy has elected to utilize various practical expedients available to adopt ASU No. 2016-02, including (1) the package of three not requiring a reassessment of (i) whether any expired or existing contracts are or contain leases; (ii) the lease classification for any expired or existing leases; and (iii) initial direct costs for any existing leases; (2) using hindsight in determining the lease term; and (3) not requiring a reassessment of whether existing or expired land easements that were not previously accounted for as leases under ASC Topic 840 are or contain a lease under ASC Topic 842. MidAmerican Energy adopted this guidance for all applicable contracts in effect as of January 1, 2019 under a modified retrospective method, and the adoption did not have a cumulative effect impact at the date of initial adoption nor a material impact on MidAmerican Energy's Financial Statements and disclosures included within Notes to Financial Statements.
MidAmerican Funding, LLC and Subsidiaries [Domain]
Allowance for Doubtful Accounts [Line Items]
Summary of Significant Accounting Policies [Text Block]	Summary of Significant Accounting Policies 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, 2019 , 2018 and 2017 . 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 the reporting unit. 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 2019 , 2018 and 2017 , 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, 2019 , 2018 and 2017 . 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). 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 Doubtful Accounts Accounts receivable are stated at the outstanding principal amount, net of an estimated allowance for doubtful accounts. The allowance for doubtful accounts 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. Nevada Power also has the ability to assess deposits on customers who have delayed payments or who are deemed to be a credit risk. As of December 31, 2019 and 2018 , the allowance for doubtful accounts totaled $15 million and $16 million , respectively, and is included in trade receivables, net on the Consolidated Balance Sheets. 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 $62 million and $56 million as of December 31 , 2019 and 2018 , and fuel, which includes coal stock, stored natural gas and fuel oil, totaling $- million and $5 million as of December 31 , 2019 and 2018 , 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. 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 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 2019 and 2018 was 7.83% and 7.95% , 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 , 2019 , 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 lease obligations and corresponding right-of-use assets 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 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 right-of-use assets are recorded in other assets and the operating lease liabilities are recorded in current and long-term other liabilities accordingly. The right-of-use assets and lease liabilities for finance leases as of December 31, 2018 have been reclassified from property, plant and equipment, net and current portion of long-term and long-term debt, respectively, to conform to the current period presentation. 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 estimated 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 Accounting Standards Codification ("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, 2019 and 2018 , trade receivables, net on the Consolidated Balance Sheets relate substantially to Customer Revenue, including unbilled revenue of $109 million and $106 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 $9 million and $- million as of December 31, 2019 and 2018 , 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. New Accounting Pronouncements In February 2016, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") No. 2016-02, which creates FASB Accounting Standards Codification ("ASC") Topic 842, "Leases" and supersedes Topic 840 "Leases." This guidance increases transparency and comparability among entities by recording lease assets and lease liabilities on the balance sheet and disclosing key information about leasing arrangements . A lessee should recognize on the balance sheet a liability to make lease payments (the lease liability) and a right-of-use asset representing its right to use the underlying asset for the lease term. The recognition, measurement and presentation of expenses and cash flows arising from a lease by a lessee have not significantly changed from previous guidance. Following the issuance of ASU No. 2016-02, the FASB issued several ASUs that clarified the implementation guidance for ASU No. 2016-02 but did not change the core principle of the guidance. Nevada Power has elected to utilize various practical expedients available to adopt ASU No. 2016-02, including (1) the package of three not requiring a reassessment of (i) whether any expired or existing contracts are or contain leases; (ii) the lease classification for any expired or existing leases; and (iii) initial direct costs for any existing leases; (2) using hindsight in determining the lease term; and (3) not requiring a reassessment of whether existing or expired land easements that were not previously accounted for as leases under ASC Topic 840 are or contain a lease under ASC Topic 842. Nevada Power adopted this guidance for all applicable contracts in-effect as of January 1, 2019 under a modified retrospective method and the adoption did not have a cumulative effect impact at the date of initial adoption.
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, 2019 , 2018 and 2017 . 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). 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 Doubtful Accounts Accounts receivable are stated at the outstanding principal amount, net of an estimated allowance for doubtful accounts. The allowance for doubtful accounts 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. Sierra Pacific also has the ability to assess deposits on customers who have delayed payments or who are deemed to be a credit risk. As of December 31, 2019 and 2018 , the allowance for doubtful accounts was $2 million and is included in trade receivables, net on the Balance Sheets. 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 $49 million and $44 million as of December 31 , 2019 and 2018 , respectively, and fuel, which includes coal stock, stored natural gas and fuel oil, totaling $8 million and $8 million as of December 31 , 2019 and 2018 , 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 2019 and 2018 was 6.65% for electric, 5.75% and 5.74% for natural gas, respectively, and 6.55% for common facilities. 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 , 2019 , 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 lease obligations and corresponding right-of-use assets 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 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 finance lease liabilities are recorded in current and long-term other liabilities accordingly. The right-of-use assets and lease liabilities for finance leases as of December 31, 2018 have been reclassified from property, plant and equipment, net and current portion of long-term and long-term debt, respectively, to conform to the current period presentation. 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 estimated 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 Accounting Standards Codification ("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, 2019 and 2018 , trade receivables, net on the Balance Sheets relate substantially to Customer Revenue, including unbilled revenue of $63 million and $57 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. New Accounting Pronouncements In February 2016, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") No. 2016-02, which creates FASB Accounting Standards Codification ("ASC") Topic 842, "Leases" and supersedes Topic 840 "Leases." This guidance increases transparency and comparability among entities by recording lease assets and lease liabilities on the balance sheet and disclosing key information about leasing arrangements . A lessee should recognize on the balance sheet a liability to make lease payments (the lease liability) and a right-of-use asset representing its right to use the underlying asset for the lease term. The recognition, measurement and presentation of expenses and cash flows arising from a lease by a lessee have not significantly changed from previous guidance. Following the issuance of ASU No. 2016-02, the FASB issued several ASUs that clarified the implementation guidance for ASU No. 2016-02 but did not change the core principle of the guidance. Sierra Pacific has elected to utilize various practical expedients available to adopt ASU No. 2016-02, including (1) the package of three not requiring a reassessment of (i) whether any expired or existing contracts are or contain leases; (ii) the lease classification for any expired or existing leases; and (iii) initial direct costs for any existing leases; (2) using hindsight in determining the lease term; and (3) not requiring a reassessment of whether existing or expired land easements that were not previously accounted for as leases under ASC Topic 840 are or contain a lease under ASC Topic 842. Sierra Pacific adopted this guidance for all applicable contracts in-effect as of January 1, 2019 under a modified retrospective method and the adoption did not have a cumulative effect impact at the date of initial adoption.

Business Acquisitions (Notes)

Business Acquisitions (Notes)	12 Months Ended
	Dec. 31, 2019
Business Combinations [Abstract]
Business Acquisitions [Text Block]	Business Acquisitions The Company completed various acquisitions, which primarily related to residential real estate brokerage businesses and, in 2017, development and construction costs for a110-megawatt ("MW")solar project and a 50-MW solar project and the remaining 25% interest in a natural gas-fueled generation facility at Nevada Power, totaling $27 million in 2019, $106 million in 2018 and $1.1 billion in 2017. The purchase price for each acquisition was allocated to the assets acquired and liabilities assumed and the 2017 acquisitions resulted in acquired assets of $1.1 billion , assumed liabilities of $487 million and recognized goodwill of $508 million . The acquired assets, assumed liabilities and recognized goodwill for the 2019 and 2018 acquisitions were not material. Additionally, in April 2018, HomeServices acquired the remaining 33.3% interest in a real estate brokerage franchise business from the noncontrolling interest member at a contractually determined option exercise price totaling $131 million .

Property, Plant and Equipment,

Property, Plant and Equipment, Net (Notes)	12 Months Ended
	Dec. 31, 2019
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 2019 2018 Regulated assets: Utility generation, transmission and distribution systems 5-80 years $ 81,127 $ 76,707 Interstate natural gas pipeline assets 3-80 years 8,165 7,524 89,292 84,231 Accumulated depreciation and amortization (26,353 ) (25,894 ) Regulated assets, net 62,939 58,337 Nonregulated assets: Independent power plants 5-30 years 6,983 6,826 Other assets 3-30 years 1,834 1,424 8,817 8,250 Accumulated depreciation and amortization (2,183 ) (1,610 ) Nonregulated assets, net 6,634 6,640 Net operating assets 69,573 64,977 Construction work-in-progress 3,732 3,110 Property, plant and equipment, net $ 73,305 $ 68,087 Construction work-in-progress includes $3.6 billion and $2.9 billion as of December 31, 2019 and 2018 , respectively, related to the construction of regulated assets.
MidAmerican Funding, LLC and Subsidiaries [Domain]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Net [Text Block]	Property, Plant and Equipment, Net 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 $3 million and $24 million as of December 31, 2019 and 2018 , respectively, and related accumulated depreciation and amortization of $1 million and $12 million as of December 31, 2019 and 2018 , respectively, which, as of December 31, 2018 , consisted primarily of a corporate aircraft owned by MHC. In 2019, MHC transferred the aircraft by dividend to MidAmerican Funding, which transferred it to BHE.
MidAmerican Energy 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 2019 2018 Utility plant in service: Generation 20-70 years $ 15,687 $ 13,727 Transmission 52-75 years 2,124 1,934 Electric distribution 20-75 years 4,095 3,672 Natural gas distribution 29-75 years 1,820 1,724 Utility plant in service 23,726 21,057 Accumulated depreciation and amortization (6,139 ) (5,941 ) Utility plant in service, net 17,587 15,116 Nonregulated property, net: Nonregulated property gross 20-50 years 7 7 Accumulated depreciation and amortization (1 ) (1 ) Nonregulated property, net 6 6 17,593 15,122 Construction work-in-progress 782 1,035 Property, plant and equipment, net $ 18,375 $ 16,157 Nonregulated property includes land, computer software and other assets 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: 2019 2018 2017 Electric 3.1 % 2.9 % 2.6 % Natural gas 2.8 % 2.8 % 2.7 %
PacifiCorp [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 2019 2018 Utility Plant: Generation 14 - 67 years $ 12,509 $ 12,606 Transmission 58 - 75 years 6,482 6,357 Distribution 20 - 70 years 7,307 7,030 Intangible plant (1) 5 - 75 years 1,016 970 Other 5 - 60 years 1,449 1,436 Utility plant in service 28,763 28,399 Accumulated depreciation and amortization (9,803 ) (10,034 ) Utility plant in service, net 18,960 18,365 Other non-regulated, net of accumulated depreciation and amortization 46 years 10 10 Plant, net 18,970 18,375 Construction work-in-progress 2,003 1,195 Property, plant and equipment, net $ 20,973 $ 19,570 (1) Computer software costs included in intangible plant are initially assigned a depreciable life of 5 to 10 years. The average depreciation and amortization rate applied to depreciable property, plant and equipment was 3.3% , 3.5% and 2.9% for the years ended December 31, 2019 , 2018 and 2017 , respectively, including the impacts of accelerated depreciation for Oregon’s share of certain wind equipment retired as a result of wind repowering projects placed into service in 2019 and accelerated depreciation for Utah’s share of certain thermal plant units in 2018 . PacifiCorp filed a depreciation study in 2018 with all of its state public utility commissions, except the California Public Utilities Commission. PacifiCorp is currently working with the commissions and interested parties and anticipates revised depreciation rates to be effective January 1, 2021. Unallocated Acquisition Adjustments PacifiCorp has unallocated acquisition adjustments that represent the excess of costs of the acquired interests in property, plant and equipment purchased from the entity that first dedicated the assets to utility service over their net book value in those assets. These unallocated acquisition adjustments included in other property, plant and equipment had an original cost of $156 million as of December 31, 2019 and 2018 , and accumulated depreciation of $132 million and $127 million as of December 31, 2019 and 2018 , respectively.
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 2019 2018 Utility plant: Generation 30 - 55 years $ 3,541 $ 3,720 Distribution 20 - 65 years 3,567 3,411 Transmission 45 - 70 years 1,444 1,439 General and intangible plant 5 - 65 years 741 716 Utility plant 9,293 9,286 Accumulated depreciation and amortization (2,951 ) (2,966 ) Utility plant, net 6,342 6,320 Other non-regulated, net of accumulated depreciation and amortization 45 years 1 1 Plant, net 6,343 6,321 Construction work-in-progress 195 97 Property, plant and equipment, net $ 6,538 $ 6,418 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 , 2019 , 2018 and 2017 was 3.3% , 3.2% , 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. Construction work-in-progress is related to the construction of regulated assets. In January 2018, Nevada Power revised its electric depreciation rates based on the results of a new depreciation study performed in 2017, the most significant impact of which was shorter estimated useful lives at the Navajo Generating Station and longer average service lives for various other utility plant groups. The net effect of these changes approximately increased depreciation and amortization expense by $7 million annually, based on depreciable plant balances at the time of the change.
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 2019 2018 Utility plant: Electric generation 25 - 60 years $ 1,133 $ 1,132 Electric distribution 20 - 100 years 1,669 1,568 Electric transmission 50 - 100 years 840 812 Electric general and intangible plant 5 - 70 years 178 185 Natural gas distribution 35 - 70 years 417 403 Natural gas general and intangible plant 5 - 70 years 14 14 Common general 5 - 70 years 338 321 Utility plant 4,589 4,435 Accumulated depreciation and amortization (1,629 ) (1,583 ) Utility plant, net 2,960 2,852 Other non-regulated, net of accumulated depreciation and amortization 70 years 2 5 Plant, net 2,962 2,857 Construction work-in-progress 113 90 Property, plant and equipment, net $ 3,075 $ 2,947 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 , 2019 , 2018 and 2017 was 3.1% , 3.1% and 3.0% , 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. Construction work-in-progress is related to the construction of regulated assets.

Jointly Owned Utility Facilitie

Jointly Owned Utility Facilities (Notes)	12 Months Ended
	Dec. 31, 2019
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, 2019 (dollars in millions): Accumulated Construction Company Facility In Depreciation and Work-in- Share Service Amortization Progress PacifiCorp: Jim Bridger Nos. 1-4 67 % $ 1,476 $ 677 $ 9 Hunter No. 1 94 484 193 1 Hunter No. 2 60 305 121 2 Wyodak 80 473 243 1 Colstrip Nos. 3 and 4 10 254 137 2 Hermiston 50 181 92 5 Craig Nos. 1 and 2 19 368 252 — Hayden No. 1 25 75 39 — Hayden No. 2 13 43 23 — Transmission and distribution facilities Various 808 255 103 Total PacifiCorp 4,467 2,032 123 MidAmerican Energy: Louisa No. 1 88 % 834 458 7 Quad Cities Nos. 1 and 2 (1) 25 729 424 11 Walter Scott, Jr. No. 3 79 930 392 5 Walter Scott, Jr. No. 4 (2) 60 316 131 1 George Neal No. 4 41 316 171 2 Ottumwa No. 1 52 634 229 19 George Neal No. 3 72 489 238 4 Transmission facilities Various 258 95 — Total MidAmerican Energy 4,506 2,138 49 NV Energy: Navajo 11 % 13 2 — Valmy 50 390 271 — Transmission facilities Various 70 29 — On Line Transmission Line 25 159 24 — Total NV Energy 632 326 — BHE Pipeline Group - common facilities Various 266 157 — Total $ 9,871 $ 4,653 $ 172 (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 $458 million and $94 million , respectively.
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, 2019 (dollars in millions): Facility Accumulated Construction PacifiCorp in Depreciation and Work-in- Share Service Amortization Progress Jim Bridger Nos. 1 - 4 67 % $ 1,476 $ 677 $ 9 Hunter No. 1 94 484 193 1 Hunter No. 2 60 305 121 2 Wyodak 80 473 243 1 Colstrip Nos. 3 and 4 10 254 137 2 Hermiston 50 181 92 5 Craig Nos. 1 and 2 19 368 252 — Hayden No. 1 25 75 39 — Hayden No. 2 13 43 23 — Transmission and distribution facilities Various 808 255 103 Total $ 4,467 $ 2,032 $ 123
MidAmerican Energy Company [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, 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, 2019 (dollars in millions): Accumulated Construction Company Plant in Depreciation and Work-in- Share Service Amortization Progress Louisa Unit No. 1 88 % $ 834 $ 458 $ 7 Quad Cities Unit Nos. 1 & 2 (1) 25 729 424 11 Walter Scott, Jr. Unit No. 3 79 930 392 5 Walter Scott, Jr. Unit No. 4 (2) 60 316 131 1 George Neal Unit No. 4 41 316 171 2 Ottumwa Unit No. 1 52 634 229 19 George Neal Unit No. 3 72 489 238 4 Transmission facilities Various 258 95 — Total $ 4,506 $ 2,138 $ 49 (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 $458 million and $94 million , respectively.
MidAmerican Funding, LLC and Subsidiaries [Domain]
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Facilities [Text Block]	Jointly Owned Utility Facilities 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 , 2019 (dollars in millions): Nevada Construction Power's Utility Accumulated Work-in- Share Plant Depreciation Progress Navajo Generating Station (1) 11 % $ 13 $ 2 $ — ON Line Transmission Line 24 151 23 — Other transmission facilities Various 66 27 — Total $ 230 $ 52 $ — (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 , 2019 (dollars in millions): Sierra Construction Pacific's Utility Accumulated Work-in- Share Plant Depreciation Progress Valmy Generating Station 50 % $ 390 $ 271 $ — ON Line Transmission Line 1 8 1 — Valmy Transmission 50 4 2 — Total $ 402 $ 274 $ —

Leases Leases (Notes)

Leases Leases (Notes)	12 Months Ended
	Dec. 31, 2019
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, 2019 Right-of-use assets: Operating leases $ 525 Finance leases 504 Total right-of-use assets $ 1,029 Lease liabilities: Operating leases $ 577 Finance leases 519 Total lease liabilities $ 1,096 The following table summarizes the Company's lease costs (in millions): Year Ended December 31, 2019 Variable $ 623 Operating 170 Finance: Amortization 16 Interest 41 Short-term 7 Total lease costs $ 857 Weighted-average remaining lease term (years): Operating leases 7.6 Finance leases 28.8 Weighted-average discount rate: Operating leases 5.2 % Finance leases 8.6 % The following table summarizes the Company's supplemental cash flow information relating to leases (in millions): Year Ended December 31, 2019 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ (153 ) Operating cash flows from finance leases (42 ) Financing cash flows from finance leases (19 ) Right-of-use assets obtained in exchange for lease liabilities: Operating leases $ 82 Finance leases 14 The Company has the following remaining lease commitments as of (in millions): December 31, 2019 Operating Finance Total 2020 $ 147 $ 71 $ 218 2021 126 77 203 2022 102 70 172 2023 73 59 132 2024 50 59 109 Thereafter 202 725 927 Total undiscounted lease payments 700 1,061 1,761 Less - amounts representing interest (123 ) (542 ) (665 ) Lease liabilities $ 577 $ 519 $ 1,096 December 31, 2018 (1) Operating Capital Total 2019 $ 147 $ 69 $ 216 2020 128 68 196 2021 110 73 183 2022 87 67 154 2023 61 56 117 Thereafter 159 772 931 Total undiscounted lease payments $ 692 $ 1,105 $ 1,797 (1) Amounts included for comparability and accounted for in accordance with ASC 840, "Leases".
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, 2019 Right-of-use assets: Operating leases $ 525 Finance leases 504 Total right-of-use assets $ 1,029 Lease liabilities: Operating leases $ 577 Finance leases 519 Total lease liabilities $ 1,096 The following table summarizes the Company's lease costs (in millions): Year Ended December 31, 2019 Variable $ 623 Operating 170 Finance: Amortization 16 Interest 41 Short-term 7 Total lease costs $ 857 Weighted-average remaining lease term (years): Operating leases 7.6 Finance leases 28.8 Weighted-average discount rate: Operating leases 5.2 % Finance leases 8.6 % The following table summarizes the Company's supplemental cash flow information relating to leases (in millions): Year Ended December 31, 2019 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ (153 ) Operating cash flows from finance leases (42 ) Financing cash flows from finance leases (19 ) Right-of-use assets obtained in exchange for lease liabilities: Operating leases $ 82 Finance leases 14 The Company has the following remaining lease commitments as of (in millions): December 31, 2019 Operating Finance Total 2020 $ 147 $ 71 $ 218 2021 126 77 203 2022 102 70 172 2023 73 59 132 2024 50 59 109 Thereafter 202 725 927 Total undiscounted lease payments 700 1,061 1,761 Less - amounts representing interest (123 ) (542 ) (665 ) Lease liabilities $ 577 $ 519 $ 1,096 December 31, 2018 (1) Operating Capital Total 2019 $ 147 $ 69 $ 216 2020 128 68 196 2021 110 73 183 2022 87 67 154 2023 61 56 117 Thereafter 159 772 931 Total undiscounted lease payments $ 692 $ 1,105 $ 1,797 (1) Amounts included for comparability and accounted for in accordance with ASC 840, "Leases".
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 Sheet (in millions): As of December 31, 2019 Right-of-use assets: Operating leases $ 12 Finance leases 19 Total right-of-use assets $ 31 Lease liabilities: Operating leases $ 12 Finance leases 19 Total lease liabilities $ 31 The following table summarizes PacifiCorp's lease costs (in millions): Year Ended December 31, 2019 Variable $ 77 Operating 3 Finance: Amortization 1 Interest 2 Short-term 2 Total lease costs $ 85 Weighted-average remaining lease term (years): Operating leases 14.0 Finance leases 9.1 Weighted-average discount rate: Operating leases 3.7 % Finance leases 10.6 % Cash payments associated with operating and finance lease liabilities approximated lease cost for the year ended December 31 , 2019 . PacifiCorp has the following remaining lease commitments as of (in millions): December 31, 2019 Operating Finance Total 2020 $ 2 $ 3 $ 5 2021 2 7 9 2022 2 3 5 2023 2 2 4 2024 1 2 3 Thereafter 7 14 21 Total undiscounted lease payments 16 31 47 Less - amounts representing interest (4 ) (12 ) (16 ) Lease liabilities $ 12 $ 19 $ 31 December 31, 2018 (1) Operating Capital Total 2019 $ 3 $ 4 $ 7 2020 3 4 7 2021 3 7 10 2022 2 3 5 2023 2 2 4 Thereafter 7 16 23 Total undiscounted lease payments $ 20 $ 36 $ 56 (1) Amounts included for comparability and accounted for in accordance with ASC 840, "Leases".
Lessee, Operating Leases [Text Block]	Leases The following table summarizes PacifiCorp's leases recorded on the Consolidated Balance Sheet (in millions): As of December 31, 2019 Right-of-use assets: Operating leases $ 12 Finance leases 19 Total right-of-use assets $ 31 Lease liabilities: Operating leases $ 12 Finance leases 19 Total lease liabilities $ 31 The following table summarizes PacifiCorp's lease costs (in millions): Year Ended December 31, 2019 Variable $ 77 Operating 3 Finance: Amortization 1 Interest 2 Short-term 2 Total lease costs $ 85 Weighted-average remaining lease term (years): Operating leases 14.0 Finance leases 9.1 Weighted-average discount rate: Operating leases 3.7 % Finance leases 10.6 % Cash payments associated with operating and finance lease liabilities approximated lease cost for the year ended December 31 , 2019 . PacifiCorp has the following remaining lease commitments as of (in millions): December 31, 2019 Operating Finance Total 2020 $ 2 $ 3 $ 5 2021 2 7 9 2022 2 3 5 2023 2 2 4 2024 1 2 3 Thereafter 7 14 21 Total undiscounted lease payments 16 31 47 Less - amounts representing interest (4 ) (12 ) (16 ) Lease liabilities $ 12 $ 19 $ 31 December 31, 2018 (1) Operating Capital Total 2019 $ 3 $ 4 $ 7 2020 3 4 7 2021 3 7 10 2022 2 3 5 2023 2 2 4 Thereafter 7 16 23 Total undiscounted lease payments $ 20 $ 36 $ 56 (1) Amounts included for comparability and accounted for in accordance with ASC 840, "Leases".
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 (in millions): As of December 31, 2019 Right-of-use assets: Operating leases $ 13 Finance leases 441 Total right-of-use assets $ 454 Lease liabilities: Operating leases $ 17 Finance leases 454 Total lease liabilities $ 471 The following table summarizes Nevada Power's lease costs (in millions): Year Ended December 31, 2019 Variable $ 434 Operating 3 Finance: Amortization 13 Interest 37 Total lease costs $ 487 Weighted-average remaining lease term (years): Operating leases 7.5 Finance leases 30.6 Weighted-average discount rate: Operating leases 4.5 % Finance leases 8.7 % The following table summarizes Nevada Power's supplemental cash flow information relating to leases (in millions): Year Ended December 31, 2019 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ (3 ) Operating cash flows from finance leases (37 ) Financing cash flows from finance leases (14 ) Right-of-use assets obtained in exchange for lease liabilities: Finance leases $ 9 Nevada Power has the following remaining lease commitments as of (in millions): December 31, 2019 Operating Finance Total 2020 $ 3 $ 60 $ 63 2021 3 64 67 2022 3 62 65 2023 2 51 53 2024 2 52 54 Thereafter 7 664 671 Total undiscounted lease payments 20 953 973 Less - amounts representing interest (3 ) (499 ) (502 ) Lease liabilities $ 17 $ 454 $ 471 December 31, 2018 (1) Operating Capital Total 2019 $ 3 $ 59 $ 62 2020 3 59 62 2021 3 61 64 2022 3 60 63 2023 2 50 52 Thereafter 10 709 719 Total undiscounted lease payments $ 24 $ 998 $ 1,022 (1) Amounts included for comparability and accounted for in accordance with ASC Topic 840, "Leases " . 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 95% for Nevada Power and 5% for Sierra Pacific . In December 2019, the PUCN ordered the Nevada Utilities to complete the procedures changing the ownership split to 75% for Nevada Power and 25% for Sierra Pacific, effective January 1, 2020. The term of the lease is 41 years with the agreement ending December 31 , 2054. Total ON Line finance lease obligations of $385 million and $395 million were included on the Consolidated Balance Sheets as of December 31 , 2019 and 2018 , 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 (in millions): As of December 31, 2019 Right-of-use assets: Operating leases $ 13 Finance leases 441 Total right-of-use assets $ 454 Lease liabilities: Operating leases $ 17 Finance leases 454 Total lease liabilities $ 471 The following table summarizes Nevada Power's lease costs (in millions): Year Ended December 31, 2019 Variable $ 434 Operating 3 Finance: Amortization 13 Interest 37 Total lease costs $ 487 Weighted-average remaining lease term (years): Operating leases 7.5 Finance leases 30.6 Weighted-average discount rate: Operating leases 4.5 % Finance leases 8.7 % The following table summarizes Nevada Power's supplemental cash flow information relating to leases (in millions): Year Ended December 31, 2019 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ (3 ) Operating cash flows from finance leases (37 ) Financing cash flows from finance leases (14 ) Right-of-use assets obtained in exchange for lease liabilities: Finance leases $ 9 Nevada Power has the following remaining lease commitments as of (in millions): December 31, 2019 Operating Finance Total 2020 $ 3 $ 60 $ 63 2021 3 64 67 2022 3 62 65 2023 2 51 53 2024 2 52 54 Thereafter 7 664 671 Total undiscounted lease payments 20 953 973 Less - amounts representing interest (3 ) (499 ) (502 ) Lease liabilities $ 17 $ 454 $ 471 December 31, 2018 (1) Operating Capital Total 2019 $ 3 $ 59 $ 62 2020 3 59 62 2021 3 61 64 2022 3 60 63 2023 2 50 52 Thereafter 10 709 719 Total undiscounted lease payments $ 24 $ 998 $ 1,022 (1) Amounts included for comparability and accounted for in accordance with ASC Topic 840, "Leases " . 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 95% for Nevada Power and 5% for Sierra Pacific . In December 2019, the PUCN ordered the Nevada Utilities to complete the procedures changing the ownership split to 75% for Nevada Power and 25% for Sierra Pacific, effective January 1, 2020. The term of the lease is 41 years with the agreement ending December 31 , 2054. Total ON Line finance lease obligations of $385 million and $395 million were included on the Consolidated Balance Sheets as of December 31 , 2019 and 2018 , 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 (in millions): As of December 31, 2019 Right-of-use assets: Operating leases $ 17 Finance leases 43 Total right-of-use assets $ 60 Lease liabilities: Operating leases $ 17 Finance leases 45 Total lease liabilities $ 62 The following table summarizes Sierra Pacific's lease costs (in millions): Year Ended December 31, 2019 Variable $ 69 Operating 1 Finance: Amortization 2 Interest 2 Total lease costs $ 74 Weighted-average remaining lease term (years): Operating leases 26.3 Finance leases 20.9 Weighted-average discount rate: Operating leases 5.0 % Finance leases 7.1 % The following table summarizes Sierra Pacific's supplemental cash flow information relating to leases (in millions): Year Ended December 31, 2019 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ (3 ) Operating cash flows from finance leases (3 ) Financing cash flows from finance leases (3 ) Right-of-use assets obtained in exchange for lease liabilities: Finance leases $ 5 Sierra Pacific has the following remaining lease commitments as of (in millions): December 31, 2019 Operating Finance Total 2020 $ 2 $ 6 $ 8 2021 2 6 8 2022 1 6 7 2023 1 6 7 2024 1 5 6 Thereafter 26 46 72 Total undiscounted lease payments 33 75 108 Less - amounts representing interest (16 ) (30 ) (46 ) Lease liabilities $ 17 $ 45 $ 62 December 31, 2018 (1) Operating Capital Total 2019 $ 2 $ 6 $ 8 2020 2 4 6 2021 2 5 7 2022 1 4 5 2023 1 4 5 Thereafter 28 47 75 Total undiscounted lease payments $ 36 $ 70 $ 106 (1) Amounts included for comparability and accounted for in accordance with ASC Topic 840, "Leases". 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 95% for Nevada Power and 5% for Sierra Pacific . In December 2019, the PUCN ordered the Nevada Utilities to complete the procedures changing the ownership split to 75% for Nevada Power and 25% for Sierra Pacific, effective January 1, 2020. 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 $35 million and $21 million were included on the Consolidated Balance Sheets as of December 31 , 2019 and 2018 , 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 (in millions): As of December 31, 2019 Right-of-use assets: Operating leases $ 17 Finance leases 43 Total right-of-use assets $ 60 Lease liabilities: Operating leases $ 17 Finance leases 45 Total lease liabilities $ 62 The following table summarizes Sierra Pacific's lease costs (in millions): Year Ended December 31, 2019 Variable $ 69 Operating 1 Finance: Amortization 2 Interest 2 Total lease costs $ 74 Weighted-average remaining lease term (years): Operating leases 26.3 Finance leases 20.9 Weighted-average discount rate: Operating leases 5.0 % Finance leases 7.1 % The following table summarizes Sierra Pacific's supplemental cash flow information relating to leases (in millions): Year Ended December 31, 2019 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ (3 ) Operating cash flows from finance leases (3 ) Financing cash flows from finance leases (3 ) Right-of-use assets obtained in exchange for lease liabilities: Finance leases $ 5 Sierra Pacific has the following remaining lease commitments as of (in millions): December 31, 2019 Operating Finance Total 2020 $ 2 $ 6 $ 8 2021 2 6 8 2022 1 6 7 2023 1 6 7 2024 1 5 6 Thereafter 26 46 72 Total undiscounted lease payments 33 75 108 Less - amounts representing interest (16 ) (30 ) (46 ) Lease liabilities $ 17 $ 45 $ 62 December 31, 2018 (1) Operating Capital Total 2019 $ 2 $ 6 $ 8 2020 2 4 6 2021 2 5 7 2022 1 4 5 2023 1 4 5 Thereafter 28 47 75 Total undiscounted lease payments $ 36 $ 70 $ 106 (1) Amounts included for comparability and accounted for in accordance with ASC Topic 840, "Leases". 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 95% for Nevada Power and 5% for Sierra Pacific . In December 2019, the PUCN ordered the Nevada Utilities to complete the procedures changing the ownership split to 75% for Nevada Power and 25% for Sierra Pacific, effective January 1, 2020. 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 $35 million and $21 million were included on the Consolidated Balance Sheets as of December 31 , 2019 and 2018 , respectively, for these leases. See Note 2 for further discussion of Sierra Pacific 's remaining lease obligations.

Regulatory Matters (Notes)

Regulatory Matters (Notes)	12 Months Ended
	Dec. 31, 2019
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 2019 2018 Employee benefit plans (1) 15 years $ 667 $ 773 Asset retirement obligations Various 445 375 Asset disposition costs Various 391 358 Deferred income taxes (2) Various 223 196 Deferred operating costs 11 years 134 141 Deferred net power costs 2 years 110 103 Unrealized loss on regulated derivative contracts 3 years 78 120 Unamortized contract values 4 years 60 79 Abandoned projects 3 years 58 134 Other Various 715 788 Total regulatory assets $ 2,881 $ 3,067 Reflected as: Current assets $ 115 $ 171 Noncurrent assets 2,766 2,896 Total regulatory assets $ 2,881 $ 3,067 (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 $1.4 billion and $1.3 billion as of December 31, 2019 and 2018 , 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 2019 2018 Deferred income taxes (1) Various $ 3,611 $ 3,923 Cost of removal (2) 27 years 2,370 2,426 Levelized depreciation 29 years 304 329 Asset retirement obligations 33 years 241 163 Impact fees 2 years 72 88 Other Various 713 577 Total regulatory liabilities $ 7,311 $ 7,506 Reflected as: Current liabilities $ 211 $ 160 Noncurrent liabilities 7,100 7,346 Total regulatory liabilities $ 7,311 $ 7,506 (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. See Note 12 for further discussion of 2017 Tax Reform impacts. (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 2019 2018 Employee benefit plans (1) 19 years $ 422 $ 448 Utah mine disposition (2) Various 125 136 Unamortized contract values 4 years 60 79 Deferred net power costs 2 years 106 62 Unrealized loss on derivative contracts 3 years 62 96 Asset retirement obligation 28 years 140 119 Other Various 208 172 Total regulatory assets $ 1,123 $ 1,112 Reflected as: Current assets $ 63 $ 36 Noncurrent assets 1,060 1,076 Total regulatory assets $ 1,123 $ 1,112 (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 net property, plant and equipment not considered probable of disallowance and for the portion of losses associated with the assets held for sale, UMWA 1974 Pension Plan withdrawal and closure costs incurred to date considered probable of recovery. PacifiCorp had regulatory assets not earning a return on investment of $609 million and $636 million as of December 31 , 2019 and 2018 , 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 2019 2018 Cost of removal (1) 26 years $ 1,019 $ 994 Deferred income taxes (2) Various 1,653 1,803 Other Various 297 258 Total regulatory liabilities $ 2,969 $ 3,055 Reflected as: Current liabilities $ 56 $ 77 Noncurrent liabilities 2,913 2,978 Total regulatory liabilities $ 2,969 $ 3,055 (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 Matters 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): Average Remaining Life 2019 2018 Asset retirement obligations (1) 6 years $ 223 $ 160 Employee benefit plans (2) 12 years 26 62 Unrealized loss on regulated derivative contracts 1 year 7 19 Other Various 33 32 Total $ 289 $ 273 (1) Amount predominantly relates to asset retirement obligations for fossil-fueled and wind-powered generating facilities. Refer to Note 11 for a discussion of asset retirement obligations. (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 $286 million and $269 million as of December 31, 2019 and 2018 , respectively. Regulatory Liabilities Regulatory liabilities represent income to be recognized or amounts 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): Average Remaining Life 2019 2018 Cost of removal accrual (1) 29 years $ 572 $ 708 Deferred income taxes (2) Various 478 626 Asset retirement obligations (3) 33 years 241 160 Employee benefit plans (4) 10 years 32 — Pre-funded AFUDC on transmission MVPs (5) 53 years 35 36 Iowa electric revenue sharing accrual (6) 1 year 22 70 Other Various 26 20 Total $ 1,406 $ 1,620 (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 asset retirement obligation. Refer to Note 11 for a discussion of asset retirement obligations. (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.
MidAmerican Funding, LLC and Subsidiaries [Domain]
Schedule Of Regulatory Assets and Liabilities [Line Items]
Regulatory Matters [Text Block]	Regulatory Matters 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 2019 2018 Decommissioning costs (2) 3 years $ 241 $ 222 Deferred operating costs 9 years 136 152 Merger costs from 1999 merger 25 years 120 125 Employee benefit plans (1) 8 years 87 105 Asset retirement obligations 6 years 67 68 Legacy meters 13 years 49 53 ON Line deferrals 34 years 45 46 Abandoned projects 1 year 12 46 Deferred energy costs 1 year — 47 Other Various 44 53 Total regulatory assets $ 801 $ 917 Reflected as: Current assets $ 1 $ 39 Noncurrent assets 800 878 Total regulatory assets $ 801 $ 917 (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 $104 million and $81 million as of December 31 , 2019 and 2018 , respectively. Nevada Power had regulatory assets not earning a return on investment of $303 million and $334 million as of December 31 , 2019 and 2018 , respectively. The regulatory assets not earning a return on investment primarily consist of merger costs from the 1999 merger, asset retirement obligations, 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 2019 2018 Deferred income taxes (1) Various $ 681 $ 677 Cost of removal (2) 33 years 332 320 Impact fees (3) 2 years 72 86 Other Various 171 103 Total regulatory liabilities $ 1,256 $ 1,186 Reflected as: Current liabilities $ 93 $ 49 Noncurrent liabilities 1,163 1,137 Total regulatory liabilities $ 1,256 $ 1,186 (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. 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. In January 2019, intervening parties filed statements of intent to participate in the petition for judicial review. Nevada Power has filed opening briefs and the intervening parties have filed answering briefs. The hearing occurred in January 2020 and a ruling is expected in the first half of 2020. 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 March 2019, Nevada Power filed an application to reset the EEIR and EEPR and to refund the EEIR revenue received in 2018, including carrying charges. In August 2019, the PUCN issued an order accepting a stipulation requiring Nevada Power to refund the 2018 revenue and reset the rates as filed effective October 1, 2019. The EEIR liability for Nevada Power is $8 million and $9 million , which is included in current regulatory liabilities on the Consolidated Balance Sheets as of December 31 , 2019 and 2018 , respectively. 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 2019 2018 Employee benefit plans (1) 8 years $ 107 $ 132 Merger costs from 1999 merger 27 years 71 74 Abandoned projects 7 years 24 29 Deferred Operating Costs 12 years 23 15 Losses on reacquired debt 15 years 17 19 Other Various 53 52 Total regulatory assets $ 295 $ 321 Reflected as: Current assets $ 12 $ 7 Noncurrent assets 283 314 Total regulatory assets $ 295 $ 321 (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 $168 million and $190 million as of December 31 , 2019 and 2018 , 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, asset retirement obligations 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 2019 2018 Deferred income taxes (1) Various $ 263 $ 270 Cost of removal (2) 38 years 217 210 Other Various 58 29 Total regulatory liabilities $ 538 $ 509 Reflected as: Current liabilities $ 49 $ 18 Noncurrent liabilities 489 491 Total regulatory liabilities $ 538 $ 509 (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. 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. In January 2019, intervening parties filed statements of intent to participate in the petition for judicial review. Sierra Pacific has filed opening briefs and the intervening parties have filed answering briefs. The hearing occurred in January 2020 and a ruling is expected in the first half of 2020. 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 March 2019, Sierra Pacific filed an application to reset the EEIR and EEPR and to refund the EEIR revenue received in 2018, including carrying charges. In August 2019, the PUCN issued an order accepting a stipulation to reset the rates as filed effective October 1, 2019. The EEIR liability for Sierra Pacific is $2 million and $2 million , which is included in current regulatory liabilities on the Balance Sheets as of December 31 , 2019 and 2018 , respectively.

Investments and Restricted Cash

Investments and Restricted Cash and Investments (Notes)	12 Months Ended
	Dec. 31, 2019
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): 2019 2018 Investments: BYD Company Limited common stock $ 1,122 $ 1,435 Rabbi trusts 410 371 Other 187 168 Total investments 1,719 1,974 Equity method investments: BHE Renewables tax equity investments 3,130 1,661 Electric Transmission Texas, LLC 555 527 Bridger Coal Company 81 99 Other 181 153 Total equity method investments 3,947 2,440 Restricted cash and cash equivalents and investments: Quad Cities Station nuclear decommissioning trust funds 599 504 Other restricted cash and cash equivalents 230 256 Total restricted cash and cash equivalents and investments 829 760 Total investments and restricted cash and cash equivalents and investments $ 6,495 $ 5,174 Reflected as: Other current assets $ 240 $ 271 Noncurrent assets 6,255 4,903 Total investments and restricted cash and cash equivalents and investments $ 6,495 $ 5,174 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. (Losses) gains on marketable securities, net recognized during the period consists of the following (in millions): Years Ended December 31, 2019 2018 Unrealized losses recognized on marketable securities still held at the reporting date $ (290 ) $ (540 ) Net gains recognized on marketable securities sold during the period 2 2 Losses on marketable securities, net $ (288 ) $ (538 ) 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 $1,619 million , $698 million and $403 million in 2019 , 2018 and 2017 , respectively, and has commitments as of December 31, 2019, subject to satisfaction of certain specified conditions, to provide equity contributions of $2.4 billion in 2020 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 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. See Note 12 for discussion of 2017 Tax Reform impacts to equity earnings recorded for the year ended December 31, 2017. 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 Investments and restricted investments consists of the following amounts as of December 31 (in millions): 2019 2018 Nuclear decommissioning trust $ 599 $ 504 Rabbi trusts 203 191 Other 16 13 Total $ 818 $ 708 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, 2019 and 2018 , the fair value of the trust's funds was invested as follows: 56% and 51% , respectively, in domestic common equity securities, 31% and 37% , respectively, in United States government securities, 10% and 9% , 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 [Domain]
Investments, Including Equity Method And Restricted Cash And Investments [Line Items]
Investments and Restricted Cash and Investments [Text Block]	Investments and Restricted Investments 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, 2019 and 2018 .

BHE Debt (Notes)

BHE Debt (Notes)	12 Months Ended
	Dec. 31, 2019
MEHC 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 2019 2018 2.40% Senior Notes, due 2020 $ 350 $ 349 $ 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 3.25% Senior Notes, due 2028 600 594 594 8.48% Senior Notes, due 2028 256 259 257 6.125% Senior Bonds, due 2036 1,670 1,661 1,661 5.95% Senior Bonds, due 2037 550 548 547 6.50% Senior Bonds, due 2037 225 223 222 5.15% Senior Notes, due 2043 750 740 740 4.50% Senior Notes, due 2045 750 738 738 3.80% Senior Notes, due 2048 750 737 737 4.45% Senior Notes, due 2049 1,000 990 990 Total BHE Senior Debt $ 8,651 $ 8,581 $ 8,577 Reflected as: Current liabilities $ 350 $ — Noncurrent liabilities 8,231 8,577 Total BHE Senior Debt $ 8,581 $ 8,577 Junior Subordinated Debentures BHE junior subordinated debentures consists of the following as of December 31 (in millions): Par Value 2019 2018 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, 2019 and 2018 .

Short-Term Debt and Credit Faci

Short-Term Debt and Credit Facilities (Notes)	12 Months Ended
	Dec. 31, 2019
Line of Credit Facility [Line Items]
Short-term Debt [Text Block]	Short-Term Debt and Credit Facilities 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) 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 2018: Credit facilities (2) $ 3,500 $ 1,200 $ 1,309 $ 650 $ 231 $ 639 $ 1,585 $ 9,114 Less: Short-term debt (983 ) (30 ) (240 ) — (77 ) (345 ) (841 ) (2,516 ) Tax-exempt bond support and letters of credit — (89 ) (370 ) (80 ) — (4 ) — (543 ) Net credit facilities $ 2,517 $ 1,081 $ 699 $ 570 $ 154 $ 290 $ 744 $ 6,055 (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 $39 million at Northern Powergrid. As of December 31, 2019 , 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 and 2018 , the weighted average interest rate on commercial paper borrowings outstanding was 1.91% and 2.76% , respectively. 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, 2019 and 2018 , BHE had $107 million and $115 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 2021 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, 2019 and 2018 , the weighted average interest rate on commercial paper borrowings outstanding was 2.05% and 2.85% , 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, 2019 and 2018 , PacifiCorp had $13 million and $184 million , respectively, of fully available letters of credit issued under committed arrangements. As of December 31, 2019 and 2018 , $13 million and $14 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 Funding MidAmerican Energy has a $900 million unsecured credit facility expiring in June 2022. The credit facility supports MidAmerican Energy's commercial paper program and its variable-rate tax-exempt bond obligations, provides for the issuance of letters of credit and 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 $400 million unsecured credit facility that expires in August 2020 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, 2018, MidAmerican Energy had a $400 million unsecured credit facility expiring November 2019, which it terminated in January 2019. MidAmerican Energy had commercial paper borrowings outstanding of $- million as of December 31, 2019 , and $240 million with a weighted average interest rate of 2.49% as of December 31, 2018 . 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 expiring in October 2022. 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) Limited 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 2023 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 2023 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. As of December 31, 2019 and 2018 , AltaLink had $192 million and $281 million outstanding under these facilities at a weighted average interest rate of 2.16% and 2.26% , 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 2023 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. As of December 31, 2019 and 2018 , AltaLink Investments, L.P. had $19 million and $64 million outstanding under this facility at a weighted average interest rate of 3.08% and 3.25% , respectively. The credit facility requires 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. In January 2020, AltaLink and AltaLink Investments, L.P. extended, with lender consent, the expiration dates for the existing credit facilities to December 2024. 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, 2019 and 2018 , HomeServices had $318 million and $404 million , respectively, outstanding under its credit facility with a weighted average interest rate of 3.29% and 3.94% , respectively. Through its subsidiaries, HomeServices maintains mortgage lines of credit totaling $1.3 billion and $985 million as of December 31, 2019 and 2018 , respectively, used for mortgage banking activities that expire beginning in January 2020 through December 2020. 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, 2019 and 2018 , HomeServices had $965 million and $436 million , respectively, outstanding under these mortgage lines of credit at a weighted average interest rate of 3.51% and 4.42% , respectively. BHE Renewables Letters of Credit As of December 31, 2019 and 2018 , certain renewable projects collectively have letters of credit outstanding of $373 million and $322 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): 2019: Credit facilities $ 1,200 Less: Short-term debt (130 ) Tax-exempt bond support (256 ) Net credit facilities $ 814 2018: Credit facilities $ 1,200 Less: Short-term debt (30 ) Tax-exempt bond support (89 ) Net credit facilities $ 1,081 As of December 31, 2019 , 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, 2019 and 2018 , the weighted average interest rate on commercial paper borrowings outstanding was 2.05% and 2.85% , 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, 2019 and 2018 , PacifiCorp had $13 million and $184 million , respectively, of fully available letters of credit issued under committed arrangements. As of December 31, 2019 and 2018 , $13 million and $14 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]	Short-Term Debt and Credit Facilities 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. MidAmerican Energy has a $900 million unsecured credit facility expiring June 2022. The credit facility supports MidAmerican Energy's commercial paper program and its variable-rate tax-exempt bond obligations, provides for the issuance of letters of credit and 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 $400 million unsecured credit facility that expires in August 2020 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 in June 2020 and has a variable interest rate based on the Eurodollar rate plus a spread. As of December 31, 2018, MidAmerican Energy had a $400 million unsecured credit facility expiring November 2019, which was terminated in January 2019. MidAmerican Energy had commercial paper borrowings outstanding of $- million as of December 31, 2019 , and $240 million with a weighted average interest rate of 2.49% as of December 31, 2018 . The $900 million and $400 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, 2019 , 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 $1.3 billion through July 31, 2020. The following table summarizes MidAmerican Energy's availability under its two unsecured revolving credit facilities as of December 31 (in millions): 2019 2018 Credit facilities $ 1,305 $ 1,305 Less: Short-term debt outstanding — (240 ) Variable-rate tax-exempt bond support (370 ) (370 ) Net credit facilities $ 935 $ 695
MidAmerican Funding, LLC and Subsidiaries [Domain]
Line of Credit Facility [Line Items]
Short-term Debt [Text Block]	Short-Term Debt and Credit Facilities 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 2020 and has a variable interest rate based on the Eurodollar rate plus a spread. As of December 31, 2019 and 2018 , there were no borrowings outstanding under this credit facility. As of December 31, 2019 , 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]	Credit Facility 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 , 2019 and 2018 , 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]	Credit Facility The following table summarizes Sierra Pacific's availability under its credit facilities as of December 31 (in millions): 2019 2018 Credit facilities $ 250 $ 250 Less - Water Facilities Refunding Revenue Bond support — (80 ) Net credit facilities $ 250 $ 170 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 , 2019 and 2018 , Sierra Pacific had no borrowings outstanding under the credit facility. 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.

Subsidiary Debt (Notes)

Subsidiary Debt (Notes)	12 Months Ended
	Dec. 31, 2019
Debt Instrument [Line Items]
Subsidiary Debt	Subsidiary Debt BHE 's direct and indirect subsidiaries are organized as legal entities separate and apart from BHE and its other subsidiaries. Pursuant to separate financing agreements, substantially all of PacifiCorp's electric utility properties; the equity interest of MidAmerican Funding's subsidiary; MidAmerican Energy's electric utility properties in the state of Iowa; substantially all of Nevada Power's and Sierra Pacific's properties in the state of Nevada; AltaLink's transmission properties; and substantially all of the assets of the subsidiaries of BHE Renewables that are direct or indirect owners of solar and wind generation projects are pledged or encumbered to support or otherwise provide the security for their related subsidiary debt. It should not be assumed that the assets of any subsidiary will be available to satisfy BHE 's obligations or the obligations of its other subsidiaries. However, unrestricted cash or other assets which are available for distribution may, subject to applicable law, regulatory commitments and the terms of financing and ring-fencing arrangements for such parties, be advanced, loaned, paid as dividends or otherwise distributed or contributed to BHE or affiliates thereof. The long-term debt of BHE's subsidiaries may include provisions that allow BHE 's subsidiaries to redeem such debt in whole or in part at any time. These provisions generally include make-whole premiums. Distributions at these separate legal entities are limited by various covenants including, among others, leverage ratios, interest coverage ratios and debt service coverage ratios. As of December 31, 2019 , all subsidiaries were in compliance with their long-term debt covenants. On January 29, 2019, PG&E Corporation and Pacific Gas and Electric Company (the "PG&E Utility") (together "PG&E") filed voluntary petitions for relief under chapter 11 of the United States Bankruptcy Code in the United States Bankruptcy Court for the Northern District of California. As a result, the Company does not expect to receive distributions from Topaz Solar Farms LLC ("Topaz") or Agua Caliente Solar, LLC ("Agua Caliente") in the near term. 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 2019 2018 PacifiCorp $ 7,705 $ 7,658 $ 7,015 MidAmerican Funding 7,515 7,427 5,597 NV Energy 3,836 3,821 3,817 Northern Powergrid 3,234 3,221 2,626 BHE Pipeline Group 1,250 1,247 1,042 BHE Transmission 3,891 3,879 3,842 BHE Renewables 3,239 3,206 3,401 HomeServices 213 213 233 Total subsidiary debt $ 30,883 $ 30,672 $ 27,573 Reflected as: Current liabilities $ 2,189 $ 2,081 Noncurrent liabilities 28,483 25,492 Total subsidiary debt $ 30,672 $ 27,573 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 2019 2018 First mortgage bonds: 2.95% to 8.53%, due through 2024 $ 1,899 $ 1,895 $ 2,244 3.35% to 6.71%, due 2025 to 2026 350 349 348 3.50% to 7.70%, due 2029 to 2031 700 696 298 5.25% to 6.35%, due 2034 to 2038 2,350 2,338 2,338 4.10% to 6.00%, due 2039 to 2042 950 939 939 4.13% to 4.15%, due 2049 to 2050 1,200 1,186 593 Variable-rate series, tax-exempt bond obligations (2019-1.60% to 1.80%; 2018-1.67% to 1.85%): Due 2020 38 38 38 Due 2024 (1)(2) 143 143 142 Due 2025 (1) 25 24 25 Due 2024 to 2025 (2) 50 50 50 Total PacifiCorp $ 7,705 $ 7,658 $ 7,015 (1) Supported by $170 million of fully available letters of credit issued under committed bank arrangements as of December 31, 2018. These arrangements were canceled in 2019. (2) 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. The issuance of PacifiCorp's first mortgage bonds is limited by available property, earnings tests and other provisions of PacifiCorp's mortgage. Approximately $29 billion of PacifiCorp's eligible property (based on original cost) was subject to the lien of the mortgage as of December 31, 2019 . 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 2019 2018 MidAmerican Funding: 6.927% Senior Bonds, due 2029 $ 239 $ 219 $ 217 MidAmerican Energy: Tax-exempt bond obligations - Variable-rate tax-exempt bond obligation series: (weighted average interest rate- 2019-1.66%, 2018-1.74%), due 2023-2047 $ 370 $ 368 $ 368 First Mortgage Bonds: 2.40%, due 2019 — — 500 3.70%, due 2023 250 249 249 3.50%, due 2024 500 501 501 3.10%, due 2027 375 373 372 3.65%, due 2029 850 864 — 4.80%, due 2043 350 346 346 4.40%, due 2044 400 395 394 4.25%, due 2046 450 445 445 3.95%, due 2047 475 470 470 3.65%, due 2048 700 688 688 4.25%, due 2049 900 872 — 3.15%, due 2050 600 591 — Notes: 6.75% Series, due 2031 400 396 396 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 5 Total MidAmerican Energy 7,276 7,208 5,380 Total MidAmerican Funding $ 7,515 $ 7,427 $ 5,597 Pursuant to MidAmerican Energy's mortgage dated September 9, 2013, as amended by the First Supplemental Indenture dated as of September 19, 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, 2019 , MidAmerican Energy's eligible property subject to the lien of the mortgage totaled approximately $20 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 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, 2019 and 2018 . MidAmerican Energy maintains revolving credit facility agreements to provide liquidity for holders of these issues and $180 million of the variable rate, tax-exempt bonds are secured by an equal amount of first mortgage bonds pursuant to MidAmerican Energy's mortgage dated September 9, 2013, as supplemented and amended. 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 2019 2018 NV Energy: 6.250% Senior Notes, due 2020 $ 315 $ 321 $ 330 Nevada Power: General and refunding mortgage securities: 7.125% Series V, due 2019 — — 500 2.750%, Series BB, due 2020 575 575 574 3.700%, Series CC, due 2029 500 496 — 6.650% Series N, due 2036 367 360 360 6.750% Series R, due 2037 349 348 348 5.375% Series X, due 2040 250 249 248 5.450% Series Y, due 2041 250 245 244 Tax-exempt refunding revenue bond obligations: Fixed-rate series: 1.800% Pollution Control Bonds Series 2017A, due 2032 (1) 40 39 40 1.600% Pollution Control Bonds Series 2017, due 2036 (1) 40 39 39 1.600% Pollution Control Bonds Series 2017B, due 2039 (1) 13 13 13 Total Nevada Power 2,384 2,364 2,366 Sierra Pacific: 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 252 256 256 Tax-exempt refunding revenue bond obligations: Fixed-rate series: 1.250% Pollution Control Series 2016A, due 2029 — — 20 1.850% Pollution Control Series 2016B, due 2029 (2) 30 29 — 1.500% Gas Facilities Series 2016A, due 2031 — — 58 3.000% Gas and Water Series 2016B, due 2036 (3) 60 62 62 1.850% Water Facilities Series 2016C, due 2036 (4) — — 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 — 1.850% Water Facilities Series 2016G, due 2036 (2) 20 20 — Total Sierra Pacific 1,137 1,136 1,121 Total NV Energy $ 3,836 $ 3,821 $ 3,817 (1) Subject to mandatory purchase by Nevada Power in May 2020 at which date the interest rate may be adjusted from time to time. (2) Subject to mandatory purchase by Sierra Pacific in April 2022 at which date the interest rate may be adjusted from time to time. (3) Subject to mandatory purchase by Sierra Pacific in June 2022 at which date the interest rate may be adjusted from time to time. (4) Bond was purchased by Sierra Pacific during 2019. As of December 31, 2018 the bond variable interest rate was 1.750% to 1.820%. (5) Bonds were purchased by Sierra Pacific during 2019 and re-offered at a fixed interest rate. As of December 31, 2018 the bonds variable interest rate was 1.750% to 1.820%. In January 2020, Nevada Power issued $425 million of its 2.400% General and Refunding Mortgage Notes, Series DD, due May 2030 and issued $300 million of its 3.125% General and Refunding Mortgage Notes, Series EE, due August 2050. Nevada Power intends to use the net proceeds from the sale of the Notes to repay $575 million aggregate principal amount of its 2.750% General and Refunding Mortgage Notes, Series BB, maturing in April 2020 and for general corporate purposes. In January 2020, Nevada Power issued a 30-day notice of early redemption to repay $575 million of its 2.750% General and Refunding Mortgage Notes, Series BB. The issuance of General and Refunding Mortgage Securities by the Nevada Utilities are subject to PUCN approval and are limited by available property and other provisions of the mortgage indentures for each of Nevada Power and Sierra Pacific. As of December 31, 2019 , approximately $8.7 billion of Nevada Power's and $4.2 billion of Sierra Pacific's (based on original cost) property was subject to the liens of the mortgages. Northern Powergrid Northern Powergrid and its subsidiaries' 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) 2019 2018 8.875% Bonds, due 2020 $ 133 $ 135 $ 133 9.25% Bonds, due 2020 265 265 260 4.133% to 4.586% European Investment Bank loans, due 2019 to 2022 251 252 293 7.25% Bonds, due 2022 265 270 262 2.50% Bonds, due 2025 199 197 189 2.073% European Investment Bank loan, due 2025 66 68 65 2.564% European Investment Bank loans, due 2027 332 330 318 7.25% Bonds, due 2028 246 250 241 4.375% Bonds, due 2032 199 196 188 5.125% Bonds, due 2035 265 262 252 5.125% Bonds, due 2035 199 197 189 2.750% Bonds, due 2049 199 196 — 2.250% Bonds, due 2059 398 389 — Variable-rate bond, due 2026 (2) 217 214 236 Total Northern Powergrid $ 3,234 $ 3,221 $ 2,626 (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 86% of the outstanding debt. The variable interest rate as of December 31, 2019 was 2.54% while the fixed interest rate was 2.82% . 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 2019 2018 Northern Natural Gas: 4.25% Senior Notes, due 2021 $ 200 $ 200 $ 199 5.80% Senior Bonds, due 2037 150 149 149 4.10% Senior Bonds, due 2042 250 248 248 4.30% Senior Bonds, due 2049 650 650 446 Total BHE Pipeline Group $ 1,250 $ 1,247 $ 1,042 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) 2019 2018 AltaLink Investments, L.P.: Series 12-1 Senior Bonds, 3.674%, due 2019 $ — $ — $ 148 Series 13-1 Senior Bonds, 3.265%, due 2020 154 154 148 Series 15-1 Senior Bonds, 2.244%, due 2022 154 154 146 Total AltaLink Investments, L.P. 308 308 442 AltaLink, L.P.: Series 2013-2 Notes, 3.621%, due 2020 96 96 92 Series 2012-2 Notes, 2.978%, due 2022 212 212 201 Series 2013-4 Notes, 3.668%, due 2023 385 384 366 Series 2014-1 Notes, 3.399%, due 2024 269 269 256 Series 2016-1 Notes, 2.747%, due 2026 269 269 255 Series 2006-1 Notes, 5.249%, due 2036 115 115 109 Series 2010-1 Notes, 5.381%, due 2040 96 96 91 Series 2010-2 Notes, 4.872%, due 2040 115 115 109 Series 2011-1 Notes, 4.462%, due 2041 212 211 201 Series 2012-1 Notes, 3.990%, due 2042 404 398 380 Series 2013-3 Notes, 4.922%, due 2043 269 268 256 Series 2014-3 Notes, 4.054%, due 2044 227 226 215 Series 2015-1 Notes, 4.090%, due 2045 269 268 255 Series 2016-2 Notes, 3.717%, due 2046 346 345 328 Series 2013-1 Notes, 4.446%, due 2053 192 192 183 Series 2014-2 Notes, 4.274%, due 2064 100 100 95 Total AltaLink, L.P. 3,576 3,564 3,392 Other: Construction Loan, 5.620%, due 2020 7 7 8 Total BHE Transmission $ 3,891 $ 3,879 $ 3,842 (1) The par values for these debt instruments are denominated in Canadian dollars. 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 2019 2018 Fixed-rate (1) : Bishop Hill Holdings Senior Notes, 5.125%, due 2032 $ 78 $ 77 $ 84 Solar Star Funding Senior Notes, 3.950%, due 2035 283 280 292 Solar Star Funding Senior Notes, 5.375%, due 2035 894 886 915 Grande Prairie Wind Senior Notes, 3.860%, due 2037 358 355 392 Topaz Solar Farms Senior Notes, 5.750%, due 2039 680 672 709 Topaz Solar Farms Senior Notes, 4.875%, due 2039 195 193 205 Alamo 6 Senior Notes, 4.170%, due 2042 216 213 221 Other 13 13 16 Variable-rate (1) : Pinyon Pines I and II Term Loans, due 2020 (2) 284 284 310 TX Jumbo Road Term Loan, due 2025 (2) 161 158 176 Marshall Wind Term Loan, due 2026 (2) 77 75 81 Total BHE Renewables $ 3,239 $ 3,206 $ 3,401 (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 75% of the Pinyon Pines outstanding debt through December 31, 2019 and 50% of the Pinyon Pines outstanding debt thereafter, and 100% of the TX Jumbo Road and Marshall Wind outstanding debt. The variable interest rate as of December 31, 2019 and 2018 was 3.69% and 4.55%, respectively, while the fixed interest rates as of December 31, 2019 and 2018 ranged from 3.21% to 5.41% . In January 2020, Pinyon Pines I and II repaid $284 million of its variable-rate term loans. This debt was refinanced with $382 million of fifteen year variable-rate term loans due December 2034. The new term loans amortize semiannually and 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 new term loans. 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 2019 2018 Variable-rate: Variable-rate term loan (2019 - 3.299%, 2018 - 4.022%), due 2022 (1) $ 213 $ 213 $ 233 (1) Term loan amortizes quarterly and variable-rate resets monthly. Annual Repayments of Long-Term Debt The annual repayments of BHE and subsidiary debt for the years beginning January 1, 2020 and thereafter, excluding fair value adjustments and unamortized premiums, discounts and debt issuance costs, are as follows (in millions): 2025 and 2020 2021 2022 2023 2024 Thereafter Total BHE senior notes $ 350 $ 450 $ — $ 900 $ — $ 6,951 $ 8,651 BHE junior subordinated debentures — — — — — 100 100 PacifiCorp 38 420 605 449 591 5,602 7,705 MidAmerican Funding — — — 315 535 6,665 7,515 NV Energy 890 — — 250 — 2,696 3,836 Northern Powergrid 480 32 498 34 35 2,155 3,234 BHE Pipeline Group — 200 — — — 1,050 1,250 BHE Transmission 251 1 366 386 270 2,617 3,891 BHE Renewables 503 172 170 174 184 2,036 3,239 HomeServices 27 33 153 — — — 213 Totals $ 2,539 $ 1,308 $ 1,792 $ 2,508 $ 1,615 $ 29,872 $ 39,634
PacifiCorp [Member]
Debt Instrument [Line Items]
Debt Disclosure [Text Block]	Long-term Debt PacifiCorp's long-term debt was as follows as of December 31 (dollars in millions): 2019 2018 Average Average Principal Carrying Interest Carrying Interest Amount Value Rate Value Rate First mortgage bonds: 2.95% to 8.53%, due through 2024 $ 1,899 $ 1,895 4.09 % $ 2,244 4.31 % 3.35% to 6.71%, due 2025 to 2026 350 349 4.31 348 4.31 3.50% to 7.70%, due 2029 to 2031 700 696 5.30 298 7.70 5.25% to 6.35%, due 2034 to 2038 2,350 2,338 5.96 2,338 5.96 4.10% to 6.00%, due 2039 to 2042 950 939 5.40 939 5.40 4.13% to 4.15%, due 2049 to 2050 1,200 1,186 4.14 593 4.13 Variable-rate series, tax-exempt bond obligations (2019-1.60% to 1.80%; 2018-1.67% to 1.85%): Due 2020 38 38 1.78 38 1.85 Due 2024 (1)(2) 143 143 1.73 142 1.68 Due 2025 (1) 25 24 1.75 25 1.75 Due 2024 to 2025 (2) 50 50 1.63 50 1.75 Total long-term debt $ 7,705 $ 7,658 $ 7,015 Reflected as: 2019 2018 Current portion of long-term debt $ 38 $ 350 Long-term debt 7,620 6,665 Total long-term debt $ 7,658 $ 7,015 1) Supported by $170 million of fully available letters of credit issued under committed bank arrangements as of December 31, 2018 . These arrangements were canceled in 2019. 2) 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 $1.0 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 (SEC) to issue up to $1.0 billion additional first mortgage bonds through October 2021. The issuance of PacifiCorp's first mortgage bonds is limited by available property, earnings tests and other provisions of PacifiCorp's mortgage. Approximately $29 billion of PacifiCorp's eligible property (based on original cost) was subject to the lien of the mortgage as of December 31, 2019 . As of December 31, 2019 , the annual principal maturities of long-term debt for 2020 and thereafter are as follows (in millions): Long-term Debt 2020 $ 38 2021 420 2022 605 2023 449 2024 591 Thereafter 5,602 Total 7,705 Unamortized discount and debt issuance costs (47 ) Total $ 7,658
MidAmerican Energy Company [Member]
Debt Instrument [Line Items]
Long-term Debt [Text Block]	Long-Term Debt 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 2019 2018 First mortgage bonds: 2.40%, due 2019 $ — $ — $ 500 3.70%, due 2023 250 249 249 3.50%, due 2024 500 501 500 3.10%, due 2027 375 373 372 3.65%, due 2029 850 864 — 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 700 688 688 4.25%, due 2049 900 872 — 3.15%, due 2050 600 591 — Notes: 6.75% Series, due 2031 400 396 396 5.75% Series, due 2035 300 298 298 5.8% Series, due 2036 350 348 347 Transmission upgrade obligation, 4.45% and 3.42% due through 2035 and 2036, respectively 6 4 5 Variable-rate tax-exempt bond obligation series: (weighted average interest rate- 2019-1.66%, 2018-1.74%): 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 $ 7,208 $ 5,379 The annual repayments of MidAmerican Energy's long-term debt for the years beginning January 1, 2020 , and thereafter, excluding unamortized premiums, discounts and debt issuance costs, are as follows (in millions): 2020 $ — 2021 — 2022 1 2023 315 2024 535 2025 and thereafter 6,425 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, 2019 , MidAmerican Energy's eligible property subject to the lien of the mortgage totaled approximately $20 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, 2019 and 2018 . 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. Proceeds of the $150 million of variable-rate, tax-exempt Solid Waste Facilities Revenue Bonds due December 2047 are restricted for the purpose of constructing solid waste facilities. As of December 31, 2019 , $32 million of the restricted proceeds remain and are reflected in other current assets on the Balance Sheet. As of December 31, 2019 , 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, 2019 , MidAmerican Energy's common equity ratio was 51% 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 $2.0 billion as of December 31, 2019 , without falling below 42% .
MidAmerican Funding, LLC and Subsidiaries [Domain]
Debt Instrument [Line Items]
Long-term Debt [Text Block]	Long-Term Debt 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 has $239 million of 6.927% Senior Bonds due in 2029 , with a carrying value of $240 million as of December 31, 2019 and 2018 . In December 2017, MidAmerican Funding redeemed through a tender offer a portion of its 6.927% Senior Bonds. A charge of $29 million for the total premium is included in other income (expense) on the Consolidated Statement of Operations. MidAmerican Funding parent company long-term debt is secured by a pledge of the common stock of MHC. See Item 15(c) for the Consolidated Financial Statements of MHC Inc. and subsidiaries. The 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. 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, 2019 . As of December 31, 2019 , 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 2019 2018 General and refunding mortgage securities: 7.125% Series V, due 2019 $ — $ — $ 500 2.750%, Series BB, due 2020 575 575 574 3.700%, Series CC, due 2029 500 496 — 6.650% Series N, due 2036 367 358 358 6.750% Series R, due 2037 349 346 346 5.375% Series X, due 2040 250 248 247 5.450% Series Y, due 2041 250 237 236 Tax-exempt refunding revenue bond obligations: Fixed-rate series: 1.800% Pollution Control Bonds Series 2017A, due 2032 (1) 40 39 40 1.600% Pollution Control Bonds Series 2017, due 2036 (1) 40 39 39 1.600% Pollution Control Bonds Series 2017B, due 2039 (1) 13 13 13 Total long-term debt $ 2,384 $ 2,351 $ 2,353 Reflected as: Current portion of long-term debt $ 575 $ 500 Long-term debt 1,776 1,853 Total long-term debt $ 2,351 $ 2,353 (1) Subject to mandatory purchase by Nevada Power in May 2020 at which date the interest rate may be adjusted from time to time. Annual Payment on Long-Term Debt The annual repayments of long-term debt for the years beginning January 1, 2020 and thereafter, are as follows (in millions): 2020 $ 575 2025 and thereafter 1,809 Total 2,384 Unamortized premium, discount and debt issuance cost (33 ) Total $ 2,351 In January 2020, Nevada Power issued $425 million of its 2.400% General and Refunding Mortgage Notes, Series DD, due May 2030 and issued $300 million of its 3.125% General and Refunding Mortgage Notes, Series EE, due August 2050. Nevada Power intends to use the net proceeds from the sale of the Notes to repay $575 million aggregate principal amount of its 2.750% General and Refunding Mortgage Notes, Series BB, maturing in April 2020 and for general corporate purposes. In January 2020, Nevada Power issued a 30-day notice of early redemption to repay $575 million of its 2.750% General and Refunding Mortgage Notes, Series BB. 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, 2019 , approximately $8.7 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 2019 2018 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: 1.250% Pollution Control Series 2016A, due 2029 — — 20 1.850% Pollution Control Series 2016B, due 2029 (1) 30 29 — 1.500% Gas Facilities Series 2016A, due 2031 — — 58 3.000% Gas and Water Series 2016B, due 2036 (2) 60 62 62 1.850% Water Facilities Series 2016C, due 2036 (3) — — 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 — 1.850% Water Facilities Series 2016G, due 2036 (1) 20 20 — Total long-term debt $ 1,137 $ 1,135 $ 1,120 Reflected as - Long-term debt $ 1,135 $ 1,120 (1) Subject to mandatory purchase by Sierra Pacific in April 2022 at which date the interest rate may be adjusted from time to time. (2) Subject to mandatory purchase by Sierra Pacific in June 2022 at which date the interest rate may be adjusted from time to time. (3) Bond was purchased by Sierra Pacific during 2019. As of December 31, 2018 the bond variable interest rate was 1.750% to 1.820% . (4) Bonds were purchased by Sierra Pacific during 2019 and re-offered at a fixed interest rate. As of December 31, 2018 the bonds variable interest rate was 1.750% to 1.820% . Annual Payment on Long-Term Debt The annual repayments of long-term debt for the years beginning January 1, 2020 and thereafter, are as follows (in millions): 2023 $ 250 2025 and thereafter 887 Total 1,137 Unamortized premium, discount and debt issuance cost (2 ) Total $ 1,135 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, 2019 , approximately $4.2 billion (based on original cost) of Sierra Pacific 's property was subject to the liens of the mortgages.

Risk Management and Hedging Act

Risk Management and Hedging Activities (Notes)	12 Months Ended
	Dec. 31, 2019
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, 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, 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, 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 ) As of December 31, 2018: Not designated as hedging contracts (1) : Commodity assets $ 36 $ 4 $ 10 $ 1 $ 51 Commodity liabilities (9 ) (1 ) (67 ) (71 ) (148 ) Total 27 3 (57 ) (70 ) (97 ) Total derivatives 27 3 (57 ) (70 ) (97 ) Cash collateral (payable) receivable (2 ) — 16 45 59 Total derivatives - net basis $ 25 $ 3 $ (41 ) $ (25 ) $ (38 ) (1) PacifiCorp's commodity derivatives are generally included in rates and as of December 31, 2019 and 2018 , a regulatory asset of $62 million and $96 million , respectively, was recorded related to the net derivative liability of $63 million and $97 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): 2019 2018 2017 Beginning balance $ 96 $ 101 $ 73 Changes in fair value recognized in regulatory assets (37 ) 12 47 Net (losses) gains reclassified to operating revenue (34 ) (68 ) 9 Net gains (losses) reclassified to energy costs 37 51 (28 ) Ending balance $ 62 $ 96 $ 101 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 2019 2018 Electricity sales Megawatt hours (2 ) (6 ) Natural gas purchases Decatherms 129 117 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 three 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, 2019 , PacifiCorp's credit ratings for its senior secured debt and its issuer credit ratings for senior unsecured debt by Moody's Investor Service and Standard & Poor's Rating Services were investment grade. The aggregate fair value of PacifiCorp's derivative contracts in liability positions with specific credit-risk-related contingent features totaled $80 million and $113 million as of December 31, 2019 and 2018 , respectively, for which PacifiCorp had posted collateral of $47 million and $61 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, 2019 and 2018 , PacifiCorp would have been required to post $27 million and $35 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.

Fair Value Measurements (Notes)

Fair Value Measurements (Notes)	12 Months Ended
	Dec. 31, 2019
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, 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 ) As of December 31, 2018: Assets: Commodity derivatives $ 1 $ 91 $ 108 $ (52 ) $ 148 Interest rate derivatives 1 13 10 — 24 Mortgage loans held for sale — 468 — — 468 Money market mutual funds (2) 409 — — — 409 Debt securities: United States government obligations 187 — — — 187 International government obligations — 4 — — 4 Corporate obligations — 46 — — 46 Municipal obligations — 2 — — 2 Agency, asset and mortgage-backed obligations — 1 — — 1 Equity securities: United States companies 256 — — — 256 International companies 1,441 — — — 1,441 Investment funds 128 — — — 128 $ 2,423 $ 625 $ 118 $ (52 ) $ 3,114 Liabilities: Commodity derivatives $ (1 ) $ (180 ) $ (9 ) $ 111 $ (79 ) Interest rate derivatives — (32 ) — — (32 ) $ (1 ) $ (212 ) $ (9 ) $ 111 $ (111 ) (1) Represents netting under master netting arrangements and a net cash collateral receivable of $79 million and $59 million as of December 31, 2019 and 2018 , 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 2019 2018 2017 2019 2018 2017 Beginning balance $ 99 $ 94 $ 60 $ 10 $ 9 $ 6 Changes included in earnings 10 1 23 479 181 147 Changes in fair value recognized in OCI (1 ) 2 (3 ) — — — Changes in fair value recognized in net regulatory assets (26 ) 3 (1 ) — — — Purchases 6 3 1 — — 4 Settlements 9 (4 ) 14 (475 ) (180 ) (148 ) Ending balance $ 97 $ 99 $ 94 $ 14 $ 10 $ 9 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): 2019 2018 Carrying Fair Carrying Fair Value Value Value Value Long-term debt $ 39,353 $ 46,004 $ 36,774 $ 39,398
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, 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 ) As of December 31, 2018: Assets: Commodity derivatives $ — $ 51 $ — $ (23 ) $ 28 Money market mutual funds (2) 69 — — — 69 Investment funds 24 — — — 24 $ 93 $ 51 $ — $ (23 ) $ 121 Liabilities - Commodity derivatives $ — $ (148 ) $ — $ 82 $ (66 ) (1) Represents netting under master netting arrangements and a net cash collateral receivable of $47 million and $59 million as of December 31, 2019 and 2018 , 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 and are primarily accounted for as available-for-sale securities. 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): 2019 2018 Carrying Fair Carrying Fair Value Value Value Value Long-term debt $ 7,658 $ 9,280 $ 7,015 $ 7,833
MidAmerican Energy 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 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, 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 ) As of December 31, 2018 Assets: Commodity derivatives $ — $ 4 $ 2 $ (3 ) $ 3 Money market mutual funds (2) 2 — — — 2 Debt securities: United States government obligations 187 — — — 187 International government obligations — 4 — — 4 Corporate obligations — 46 — — 46 Municipal obligations — 2 — — 2 Agency, asset and mortgage-backed obligations — 1 — — 1 Equity securities: United States companies 256 — — — 256 International companies 6 — — — 6 Investment funds 10 — — — 10 $ 461 $ 57 $ 2 $ (3 ) $ 517 Liabilities: Commodity derivatives $ — $ (4 ) $ (2 ) $ 3 $ (3 ) Interest rate derivatives (3) $ — $ (19 ) $ — $ — $ (19 ) $ — $ (23 ) $ (2 ) $ 3 $ (22 ) (1) Represents netting under master netting arrangements and a net cash collateral receivable of $1 million and $- million as of December 31, 2019 and 2018 , 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. (3) The interest rate derivatives were interest rate locks related to MidAmerican Energy's January 2019 issuance of first mortgage bonds. 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): 2019 2018 Carrying Value Fair Value Carrying Value Fair Value Long-term debt $ 7,208 $ 8,283 $ 5,379 $ 5,644
MidAmerican Funding, LLC and Subsidiaries [Domain]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Measurements [Text Block]	Fair Value Measurements 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): 2019 2018 Carrying Value Fair Value Carrying Value Fair Value Long-term debt $ 7,448 $ 8,599 $ 5,619 $ 5,941
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, 2019: Assets: Commodity derivatives $ — $ — $ — $ — Money market mutual funds (1) 10 — — 10 Investment funds 2 — — 2 $ 12 $ — $ — $ 12 Liabilities - commodity derivatives $ — $ — $ (8 ) $ (8 ) As of December 31, 2018: Assets: Commodity derivatives $ — $ — $ 7 $ 7 Money market mutual funds (1) 104 — — 104 Investment funds 1 — — 1 $ 105 $ — $ 7 $ 112 Liabilities - commodity derivatives $ — $ — $ (4 ) $ (4 ) (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, 2019 , 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): 2019 2018 2017 Beginning balance $ 3 $ (3 ) $ (14 ) Changes in fair value recognized in regulatory assets or liabilities (21 ) 4 (3 ) Settlements 10 2 14 Ending balance $ (8 ) $ 3 $ (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): 2019 2018 Carrying Fair Carrying Fair Value Value Value Value Long-term debt $ 2,351 $ 2,848 $ 2,353 $ 2,651
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, 2019: Assets - money market mutual funds (1) $ 25 $ — $ — $ 25 Liabilities - commodity derivatives $ — $ — $ (1 ) $ (1 ) As of December 31, 2018: Assets: Commodity derivatives $ — $ — $ 2 $ 2 Money market mutual funds (1) 45 — — 45 $ 45 $ — $ 2 $ 47 (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): 2019 2018 Carrying Fair Carrying Fair Value Value Value Value Long-term debt $ 1,135 $ 1,258 $ 1,120 $ 1,167

Other, Net (Notes)

Other, Net (Notes)	12 Months Ended
	Dec. 31, 2019
MidAmerican Energy Company [Member]
Component of Other Income (Expense), Nonoperating [Line Items]
Other, Net [Text Block]	Other Income (Expense) - Other, Net Other, net, as shown on the Statements of Operations, includes the following other income (expense) items for the years ended December 31 (in millions): 2019 2018 2017 Non-service cost components of postretirement employee benefit plans $ 17 $ 21 $ 18 Corporate-owned life insurance income 24 6 13 Interest income and other, net 9 3 6 Total $ 50 $ 30 $ 37
MidAmerican Funding, LLC and Subsidiaries [Domain]
Component of Other Income (Expense), Nonoperating [Line Items]
Other, Net [Text Block]	Other Income (Expense) - Other, Net 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): 2019 2018 2017 Non-service cost components of postretirement employee benefit plans $ 17 $ 21 $ 18 Corporate-owned life insurance income 24 6 13 Loss on debt tender offer — — (29 ) Interest income and other, net 11 4 7 Total $ 52 $ 31 $ 9 Refer to Note 8 for information regarding the debt tender offer.

Income Taxes (Notes)

Income Taxes (Notes)	12 Months Ended
	Dec. 31, 2019
Schedule of Effective Income Tax Rate Reconciliation [Line Items]
Income Taxes [Text Block]	Income Taxes Tax Cuts and Jobs Act The 2017 Tax Reform impacted many areas of income tax law. The most material items include the reduction of the federal corporate tax rate from 35% to 21% effective January 1, 2018, the one-time repatriation tax of foreign earnings and profits and limitations on bonus depreciation for utility property. 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 the 2017 Tax Reform, in December 2017, the Company reduced deferred income tax liabilities $7,115 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 $5,950 million . The reduction in deferred income tax liabilities also resulted in a decrease in deferred income tax expense of $1,150 million , mostly driven by the Company's non-regulated businesses, primarily BHE Renewables, BHE's investment in BYD Company Limited and HomeServices. As a result of the 2017 Tax Reform, BHE's consolidated net income in 2017 increased by $516 million primarily due to benefits from reductions in deferred income tax liabilities of $1,150 million , partially offset by an accrual for the deemed repatriation of undistributed foreign earnings and profits totaling $419 million and equity earnings charges totaling $228 million mainly for amounts to be returned to the customers of equity investments in regulated entities. In December 2017, the Securities and Exchange Commission issued Staff Accounting Bulletin ("SAB") 118 to assist in the implementation process of the 2017 Tax Reform by allowing for calculations to be classified as provisional and subject to remeasurement. There are three different classifications for the accounting: (1) completed, (2) not complete but reasonably estimable or (3) not complete and amounts are not reasonably estimable. The Company recorded the impacts of the 2017 Tax Reform in December 2017 and believed all the impacts to be complete with the exception of the repatriation tax on foreign earnings and interpretations of the bonus depreciation rules. The Company determined the amounts recorded and the interpretations relating to these two items to be provisional and subject to remeasurement during the measurement period upon obtaining the necessary additional information to complete the accounting. The Company believed the estimates for the repatriation tax to be reasonable, however, additional time was required to validate the inputs to the foreign earnings and profits calculation, the basis on which the repatriation tax is determined and additional guidance was required to determine state income tax implications. The Company also believed its interpretations for bonus depreciation to be reasonable, however, clarifying guidance was needed. During 2018 , the Company finalized its provisional amounts resulting in a $134 million reduction to the repatriation tax liability estimate, based on further analysis of the earnings and profits completed during 2018 and additional guidance from certain states. In addition, the Company recorded a current tax benefit and deferred tax expense of $68 million following clarifying bonus depreciation guidance. As a result of 2017 Tax Reform and the nature of the Company's regulated businesses, the Company reduced the associated deferred income tax liabilities $27 million and increased regulatory liabilities by the same amount. 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): 2019 2018 2017 Current: Federal $ (956 ) $ (686 ) $ (653 ) State (13 ) (9 ) (3 ) Foreign 81 104 83 (888 ) (591 ) (573 ) Deferred: Federal 431 165 (76 ) State (127 ) (131 ) 100 Foreign (8 ) (20 ) 2 296 14 26 Investment tax credits (6 ) (6 ) (7 ) Total $ (598 ) $ (583 ) $ (554 ) 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: 2019 2018 2017 Federal statutory income tax rate 21 % 21 % 35 % Income tax credits (32 ) (30 ) (20 ) Effects of ratemaking (6 ) (8 ) (1 ) State income tax, net of federal income tax benefit (5 ) (6 ) 3 Effects of tax rate change and repatriation tax — (4 ) (31 ) Income tax effect of foreign income (2 ) (3 ) (5 ) Equity income — 1 (2 ) Other, net (1 ) (1 ) (1 ) Effective income tax rate (25 )% (30 )% (22 )% Effects of 2017 Tax Reform have been included in state income tax, net of federal income tax benefit, effects of tax rate change and repatriation tax and equity income. 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. 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, 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. As of December 31, 2018 , the Company had a current income tax payable to Berkshire Hathaway for federal income tax of $172 million, a current income tax receivable from Berkshire Hathaway for Iowa state income tax of $90 million and a long-term income tax receivable from Berkshire Hathaway, reflected as a component of BHE's shareholders' equity, of $457 million for Iowa state income tax. Additionally, for the years ended December 31, 2019 and 2018 the Company generated $79 million and $53 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 net deferred income tax liability consists of the following as of December 31 (in millions): 2019 2018 Deferred income tax assets: Regulatory liabilities $ 1,610 $ 1,674 Federal, state and foreign carryforwards 575 596 AROs 306 232 Other 590 527 Total deferred income tax assets 3,081 3,029 Valuation allowances (143 ) (137 ) Total deferred income tax assets, net 2,938 2,892 Deferred income tax liabilities: Property-related items (10,439 ) (10,185 ) Investments (1,137 ) (876 ) Regulatory assets (631 ) (656 ) Other (384 ) (222 ) Total deferred income tax liabilities (12,591 ) (11,939 ) Net deferred income tax liability $ (9,653 ) $ (9,047 ) The following table provides the Company's net operating loss and tax credit carryforwards and expiration dates as of December 31, 2019 (in millions): Federal State Foreign Total Net operating loss carryforwards (1) $ 292 $ 5,819 $ 523 $ 6,634 Deferred income taxes on net operating loss carryforwards 61 323 141 525 Expiration dates 2020 - indefinite 2020 - 2039 2035 - 2038 Tax credits $ 23 $ 27 $ — $ 50 Expiration dates 2023 - indefinite 2020 - 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 2020. The United States Internal Revenue Service has closed its examination of the Company's income tax returns through December 31, 2011. The statute of limitations for the Company's income tax returns have expired through December 31, 2009, for California, Nebraska, Oregon and Utah, through December 31, 2011 for Minnesota and Montana, and through December 31, 2015, except for the impact of any federal audit adjustments, for Idaho, Illinois, Iowa and Kansas. 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): 2019 2018 Beginning balance $ 185 $ 181 Additions based on tax positions related to the current year 3 4 Additions for tax positions of prior years 13 38 Reductions for tax positions of prior years (37 ) (38 ) Statute of limitations (9 ) 2 Settlements (5 ) (2 ) Interest and penalties (5 ) — Ending balance $ 145 $ 185 As of December 31, 2019 and 2018 , the Company had unrecognized tax benefits totaling $139 million and $154 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): 2019 2018 2017 Current: Federal $ 158 $ 164 $ 249 State 34 40 41 Total 192 204 290 Deferred: Federal (132 ) (187 ) 59 State 4 (9 ) 15 Total (128 ) (196 ) 74 Investment tax credits (3 ) (3 ) (4 ) Total income tax expense $ 61 $ 5 $ 360 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: 2019 2018 2017 Federal statutory income tax rate 21 % 21 % 35 % State income taxes, net of federal income tax benefit 3 4 3 Amortization of excess deferred income taxes (11 ) (17 ) — Effects of ratemaking (2 ) — 1 Federal income tax credits (3 ) (7 ) (5 ) Other (1 ) — (2 ) Effective income tax rate 7 % 1 % 32 % 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 10 years from the date the qualifying generating facilities are placed in-service. Amortization of excess deferred income taxes is primarily attributable to the amortization of $91 million of Oregon allocated excess deferred income taxes pursuant to the Oregon Renewable Adjustment Clause settlement, whereby a portion of Oregon allocated excess deferred income taxes was used to accelerate depreciation on Oregon's share of certain repowered wind facilities. Amortization of excess deferred income taxes in 2018 is primarily attributable to the amortization of $127 million of Utah allocated excess deferred income taxes pursuant to a 2017 Tax Reform settlement approved by the UPSC, whereby a portion of Utah allocated excess deferred income taxes was used to accelerate depreciation on Utah's share of certain thermal plant units. The net deferred income tax liability consists of the following as of December 31 (in millions): 2019 2018 Deferred income tax assets: Regulatory liabilities $ 731 $ 752 Employee benefits 83 91 Derivative contracts and unamortized contract values 33 45 State carryforwards 70 77 Asset retirement obligations 61 53 Other 68 56 1,046 1,074 Deferred income tax liabilities: Property, plant and equipment (3,312 ) (3,335 ) Regulatory assets (276 ) (273 ) Other (21 ) (9 ) (3,609 ) (3,617 ) Net deferred income tax liability $ (2,563 ) $ (2,543 ) The following table provides PacifiCorp's net operating loss and tax credit carryforwards and expiration dates as of December 31, 2019 (in millions): State Net operating loss carryforwards $ 1,140 Deferred income taxes on net operating loss carryforwards $ 51 Expiration dates 2023 - 2032 Tax credit carryforwards $ 19 Expiration dates 2020 - indefinite The United States Internal Revenue Service has closed its examination of PacifiCorp's income tax returns through December 31, 2011. The statute of limitations for PacifiCorp's state income tax returns have expired through December 31, 2011, with the exception of California, Utah and Oregon, for which the statutes have expired through December 31, 2009. In addition, Idaho's statute of limitations has expired through December 31, 2015, 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]	Income Taxes MidAmerican Energy's income tax benefit from continuing operations consists of the following for the years ended December 31 (in millions): 2019 2018 2017 Current: Federal $ (478 ) $ (276 ) $ (490 ) State (47 ) (12 ) (25 ) (525 ) (288 ) (515 ) Deferred: Federal 166 42 335 State (11 ) (8 ) (2 ) 155 34 333 Investment tax credits (1 ) (1 ) (1 ) Total $ (371 ) $ (255 ) $ (183 ) A reconciliation of the federal statutory income tax rate to MidAmerican Energy's effective income tax rate applicable to income before income tax benefit from continuing operations is as follows for the years ended December 31: 2019 2018 2017 Federal statutory income tax rate 21 % 21 % 35 % Income tax credits (90 ) (73 ) (68 ) State income tax, net of federal income tax benefit (11 ) (4 ) (4 ) Effects of ratemaking (8 ) (5 ) (7 ) Other, net — 1 1 Effective income tax rate (88 )% (60 )% (43 )% 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): 2019 2018 Deferred income tax assets: Regulatory liabilities $ 368 $ 405 Asset retirement obligations 234 164 Employee benefits 26 47 Other 71 80 Total deferred income tax assets 699 696 Deferred income tax liabilities: Depreciable property (3,253 ) (2,945 ) Regulatory assets (68 ) (61 ) Other (4 ) (12 ) Total deferred income tax liabilities (3,325 ) (3,018 ) Net deferred income tax liability $ (2,626 ) $ (2,322 ) As of December 31, 2019 , MidAmerican Energy has available $51 million of state tax carryforwards, principally related to $745 million of net operating losses, that expire at various intervals between 2020 and 2038 . The United States Internal Revenue Service has closed its examination of MidAmerican Energy's income tax returns through December 31, 2011. The statute of limitations for MidAmerican Energy's state income tax returns have expired through December 31, 2009, with the exception of Iowa and Illinois, for which the statute of limitations have expired through December 31, 2015, 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): 2019 2018 Beginning balance $ 10 $ 12 Additions based on tax positions related to the current year 5 4 Additions for tax positions of prior years 10 47 Reductions based on tax positions related to the current year (5 ) (4 ) Reductions for tax positions of prior years (12 ) (48 ) Interest and penalties — (1 ) Ending balance $ 8 $ 10 As of December 31, 2019 , MidAmerican Energy had unrecognized tax benefits totaling $27 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 [Domain]
Schedule of Effective Income Tax Rate Reconciliation [Line Items]
Income Taxes [Text Block]	Income Taxes MidAmerican Funding's income tax benefit from continuing operations consists of the following for the years ended December 31 (in millions): 2019 2018 2017 Current: Federal $ (480 ) $ (280 ) $ (505 ) State (49 ) (14 ) (31 ) (529 ) (294 ) (536 ) Deferred: Federal 164 42 338 State (11 ) (9 ) (3 ) 153 33 335 Investment tax credits (1 ) (1 ) (1 ) Total $ (377 ) $ (262 ) $ (202 ) A reconciliation of the federal statutory income tax rate to MidAmerican Funding's effective income tax rate applicable to income before income tax benefit from continuing operations is as follows for the years ended December 31: 2019 2018 2017 Federal statutory income tax rate 21 % 21 % 35 % Income tax credits (94 ) (76 ) (77 ) State income tax, net of federal income tax benefit (12 ) (4 ) (6 ) Effects of ratemaking (8 ) (6 ) (8 ) Other, net — 1 2 Effective income tax rate (93 )% (64 )% (54 )% 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): 2019 2018 Deferred income tax assets: Regulatory liabilities $ 368 $ 405 Asset retirement obligations 234 164 Employee benefits 26 47 Other 76 85 Total deferred income tax assets 704 701 Deferred income tax liabilities: Depreciable property (3,253 ) (2,947 ) Regulatory assets (68 ) (62 ) Other (4 ) (11 ) Total deferred income tax liabilities (3,325 ) (3,020 ) Net deferred income tax liability $ (2,621 ) $ (2,319 ) As of December 31, 2019 , MidAmerican Funding has available $51 million of state tax carryforwards, principally related to $745 million of net operating losses, that expire at various intervals between 2020 and 2038 . The United States Internal Revenue Service has closed its examination MidAmerican Funding’s income tax returns through December 31, 2011. The statute of limitations for MidAmerican Funding’s state income tax returns have expired through December 31, 2009, with the exception of Iowa and Illinois, for which the statute of limitations have expired through December 31, 2015, 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): 2019 2018 Beginning balance $ 10 $ 12 Additions based on tax positions related to the current year 5 4 Additions for tax positions of prior years 10 47 Reductions based on tax positions related to the current year (5 ) (4 ) Reductions for tax positions of prior years (12 ) (48 ) Interest and penalties — (1 ) Ending balance $ 8 $ 10 As of December 31, 2019 , MidAmerican Funding had unrecognized tax benefits totaling $27 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): 2019 2018 2017 Current – Federal $ 105 $ 84 $ 62 Deferred – Federal (31 ) (13 ) 95 Uncertain tax positions — 2 — Investment tax credits (1 ) (1 ) (1 ) Total income tax expense $ 73 $ 72 $ 156 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 : 2019 2018 2017 Federal statutory income tax rate 21 % 21 % 35 % Non-deductible expenses — 3 — Effect of ratemaking — — 1 Effect of tax rate change — — 1 Other 1 — 1 Effective income tax rate 22 % 24 % 38 % The net deferred income tax liability consists of the following as of December 31 (in millions): 2019 2018 Deferred income tax assets: Regulatory liabilities $ 211 $ 209 Operating and finance leases 99 97 Employee benefits 14 15 Customer advances 19 18 Other 9 9 Total deferred income tax assets 352 348 Deferred income tax liabilities: Property related items (797 ) (799 ) Regulatory assets (166 ) (196 ) Operating and finance leases (95 ) (94 ) Other (8 ) (8 ) Total deferred income tax liabilities (1,066 ) (1,097 ) Net deferred income tax liability $ (714 ) $ (749 ) The United States Internal Revenue Service has closed its examination of NV Energy ’s consolidated income tax returns through December 31, 2008, and the statute of limitations has expired for NV Energy ’s consolidated income tax returns through the short year ended December 19, 2013. The statute of limitations expiring 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): 2019 2018 2017 Current – Federal $ 19 $ 23 $ — Deferred – Federal 10 7 56 Uncertain tax positions — 1 — Investment tax credits (1 ) (1 ) (1 ) Total income tax expense $ 28 $ 30 $ 55 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 : 2019 2018 2017 Federal statutory income tax rate 21 % 21 % 35 % Non-deductible expenses — 4 — Effect of tax rate change — — (1 ) Effective income tax rate 21 % 25 % 34 % The net deferred income tax liability consists of the following as of December 31 (in millions): 2019 2018 Deferred income tax assets: Regulatory liabilities $ 70 $ 70 Employee benefit plans 6 10 Operating and finance leases 13 8 Customer Advances 9 8 Other 6 6 Total deferred income tax assets 104 102 Deferred income tax liabilities: Property related items (370 ) (346 ) Regulatory assets (62 ) (73 ) Operating and finance leases (13 ) (8 ) Other (6 ) (6 ) Total deferred income tax liabilities (451 ) (433 ) Net deferred income tax liability $ (347 ) $ (331 ) The United States Internal Revenue Service has closed its examination of NV Energy ’s consolidated income tax returns through December 31, 2008, and the statute of limitations has expired for NV Energy ’s consolidated income tax returns through the short year ended December 19, 2013. The statute of limitations expiring 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.

Supplemental Cash Flow Disclosu

Supplemental Cash Flow Disclosures Supplemental Cash Flow Disclosures (Notes)	12 Months Ended
	Dec. 31, 2019
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, 2019 and December 31, 2018 , 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, 2019 and December 31, 2018 , 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, 2019 2018 Cash and cash equivalents $ 1,040 $ 627 Restricted cash and cash equivalents 212 227 Investments and restricted cash and cash equivalents and investments 16 29 Total cash and cash equivalents and restricted cash and cash equivalents $ 1,268 $ 883 The summary of supplemental cash flow disclosures as of and for the years ending December 31 is as follows (in millions): 2019 2018 2017 Supplemental disclosure of cash flow information: Interest paid, net of amounts capitalized $ 1,723 $ 1,713 $ 1,715 Income taxes received, net (1) $ 850 $ 780 $ 540 Supplemental disclosure of non-cash investing and financing transactions: Accruals related to property, plant and equipment additions $ 888 $ 823 $ 653 Common stock exchanged for junior subordinated debentures $ — $ — $ 100 (1) Includes $942 million , $884 million and $636 million of income taxes received from Berkshire Hathaway in 2019 , 2018 and 2017 , 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, 2019 and 2018 , 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): 2019 2018 Cash and cash equivalents $ 30 $ 77 Restricted cash included in other current assets 4 13 Restricted cash included in other assets 2 2 Total cash and cash equivalents and restricted cash and cash equivalents $ 36 $ 92 The summary of supplemental cash flow disclosures as of and for the years ended December 31 is as follows (in millions): 2019 2018 2017 Interest paid, net of amounts capitalized $ 340 $ 347 $ 350 Income taxes paid, net $ 171 $ 144 $ 340 Supplemental disclosure of non-cash investing and financing activities: Accounts payable related to property, plant and equipment additions $ 293 $ 184 $ 147
MidAmerican Energy Company [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Supplemental Cash Flow Disclosures [Text Block]	Supplemental Cash Flow Disclosures 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, 2019 and 2018 , consist substantially of funds restricted 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, 2019 and 2018 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, 2019 2018 Cash and cash equivalents $ 287 $ — Restricted cash and cash equivalents in other current assets 43 56 Total cash and cash equivalents and restricted cash and cash equivalents $ 330 $ 56 The summary of supplemental cash flow disclosures as of and for the years ending December 31 is as follows (in millions): 2019 2018 2017 Supplemental cash flow information: Interest paid, net of amounts capitalized $ 224 $ 198 $ 193 Income taxes received, net $ 450 $ 494 $ 465 Supplemental disclosure of non-cash investing transactions: Accounts payable related to utility plant additions $ 337 $ 371 $ 224
MidAmerican Funding, LLC and Subsidiaries [Domain]
Condensed Cash Flow Statements, Captions [Line Items]
Supplemental Cash Flow Disclosures [Text Block]	Supplemental Cash Flow Information 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, 2019 and 2018 , consist substantially of funds restricted 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, 2019 and 2018 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, 2019 2018 Cash and cash equivalents $ 288 $ 1 Restricted cash and cash equivalents in other current assets 43 56 Total cash and cash equivalents and restricted cash and cash equivalents $ 331 $ 57 The summary of supplemental cash flow information as of and for the years ending December 31 is as follows (in millions): 2019 2018 2017 Supplemental cash flow information: Interest paid, net of amounts capitalized $ 245 $ 218 $ 218 Income taxes received, net $ 456 $ 511 $ 472 Supplemental disclosure of non-cash investing and financing transactions: Accounts payable related to utility plant additions $ 337 $ 371 $ 224 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, 2019 and December 31, 2018 , consist of funds restricted by the Public Utilities Commission of Nevada ("PUCN") for a certain renewable energy contract. A reconciliation of cash and cash equivalents and restricted cash and cash equivalents as of December 31, 2019 and December 31, 2018 , 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, 2019 2018 Cash and cash equivalents $ 15 $ 111 Restricted cash and cash equivalents included in other current assets 10 10 Total cash and cash equivalents and restricted cash and cash equivalents $ 25 $ 121 The summary of supplemental cash flow disclosures as of and for the years ended December 31 is as follows (in millions): 2019 2018 2017 Supplemental disclosure of cash flow information: Interest paid, net of amounts capitalized $ 126 $ 166 $ 167 Income taxes paid $ 113 $ 117 $ 89 Supplemental disclosure of non-cash investing and financing transactions: Accruals related to property, plant and equipment additions $ 49 $ 34 $ 18
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, 2019 and December 31, 2018 , consist of funds restricted by the Public Utilities Commission of Nevada ("PUCN") for a certain renewable energy contract. A reconciliation of cash and cash equivalents and restricted cash and cash equivalents as of December 31, 2019 and December 31, 2018 , 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, 2019 2018 Cash and cash equivalents $ 27 $ 71 Restricted cash and cash equivalents included in other current assets 5 5 Total cash and cash equivalents and restricted cash and cash equivalents $ 32 $ 76 The summary of supplemental cash flow disclosures as of and for the years ended December 31 is as follows (in millions): 2019 2018 2017 Supplemental disclosure of cash flow information: Interest paid, net of amounts capitalized $ 41 $ 41 $ 40 Income taxes paid $ 37 $ 19 $ — Supplemental disclosure of non-cash investing and financing transactions: Accruals related to property, plant and equipment additions $ 18 $ 15 $ 10

Related Party Transactions Rela

Related Party Transactions Related Party Transactions (Notes)	12 Months Ended
	Dec. 31, 2019
PacifiCorp [Member]
Related Party Transaction [Line Items]
Related Party Transactions Disclosure [Text Block]	Related-Party Transactions PacifiCorp has an intercompany administrative services agreement with BHE and its subsidiaries. Amounts charged to PacifiCorp by BHE and its subsidiaries under this agreement totaled $10 million , $12 million and $11 million during the years ended December 31, 2019 , 2018 and 2017 , respectively. Payables associated with these administrative services were immaterial as of December 31, 2019 and 2018 , respectively. Amounts charged by PacifiCorp to BHE and its subsidiaries under this agreement, as well as receivables associated with these administrative services, were immaterial during the years ended December 31, 2019 , 2018 and 2017 , respectively. 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 $7 million , $8 million and $6 million during the years ended December 31, 2019 , 2018 and 2017 , respectively. Payables associated with these services were immaterial as of December 31, 2019 and 2018 , respectively. Amounts charged by PacifiCorp to subsidiaries of BHE for wholesale electricity sales in the ordinary course of business were immaterial during the years ended December 31, 2019 , 2018 and 2017 , 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 $35 million , $33 million and $35 million during the years ended December 31, 2019 , 2018 and 2017 , respectively. As of December 31, 2019 and 2018 , PacifiCorp had immaterial amounts of accounts payable to BNSF outstanding under these contracts, including indirect payables related to a jointly owned facility. 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 payable to BHE were $31 million and $10 million as of December 31, 2019 and 2018 , respectively. For the years ended December 31, 2019 , 2018 and 2017 , cash paid for federal and state income taxes to BHE totaled $171 million , $144 million and $340 million , respectively. PacifiCorp transacts with its equity investees, Bridger Coal and Trapper Mining Inc. During the years ended December 31, 2019 , 2018 and 2017 , PacifiCorp charged Bridger Coal immaterial amounts, primarily for administrative support and management services provided by PacifiCorp to Bridger Coal. Receivables for these services, as well as for certain expenses paid by PacifiCorp and reimbursed by Bridger Coal, were immaterial as of December 31, 2019 and 2018 , respectively. Services provided by equity investees to PacifiCorp primarily relate to coal purchases. During the years ended December 31, 2019 , 2018 and 2017 , coal purchases from PacifiCorp's equity investees totaled $155 million , $163 million and $170 million , respectively. Payables to PacifiCorp's equity investees were $12 million and $13 million as of December 31, 2019 and 2018 , respectively.
MidAmerican Energy Company [Member]
Related Party Transaction [Line Items]
Related Party Transactions Disclosure [Text Block]	Related Party Transactions 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 $43 million , $51 million and $53 million for 2019 , 2018 and 2017 , 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 $14 million , $11 million and $9 million in 2019 , 2018 and 2017 , respectively, for its share of corporate expenses. MidAmerican Energy purchases 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, in the normal course of business at either tariffed or market prices. These purchases totaled $139 million , $127 million and $122 million in 2019 , 2018 and 2017 , respectively. MidAmerican Energy had accounts receivable from affiliates of $6 million and $8 million as of December 31, 2019 and 2018 , respectively, that are included in receivables on the Balance Sheets. MidAmerican Energy also had accounts payable to affiliates of $11 million and $12 million as of December 31, 2019 and 2018 , 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 $82 million and $156 million as of December 31, 2019 and 2018 , respectively. MidAmerican Energy received net cash receipts for federal and state income taxes from BHE totaling $450 million , $494 million and $465 million for the years ended December 31, 2019 , 2018 and 2017 , 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 $23 million and $20 million as of December 31, 2019 and 2018 , respectively, and similar amounts payable to affiliates totaled $47 million and $36 million as of December 31, 2019 and 2018 , respectively. See Note 10 for further information pertaining to pension and postretirement accounting.
MidAmerican Funding, LLC and Subsidiaries [Domain]
Related Party Transaction [Line Items]
Related Party Transactions Disclosure [Text Block]	Related Party Transactions 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 $41 million , $44 million and $46 million for 2019 , 2018 and 2017 , 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 $14 million , $11 million and $9 million in 2019 , 2018 and 2017 , respectively, for its share of corporate expenses. MidAmerican Energy purchases 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, in the normal course of business at either tariffed or market prices. These purchases totaled $139 million , $127 million and $122 million in 2019 , 2018 and 2017 , respectively. MHC has a $300 million revolving credit arrangement carrying interest at the 30-day LIBOR rate plus a spread to borrow from BHE. Outstanding balances are unsecured and due on demand. The outstanding balance was $171 million at an interest rate of 1.944% as of December 31, 2019 , and $156 million at an interest rate of 2.629% as of December 31, 2018 , 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 2019 and 2018 . MidAmerican Funding had accounts receivable from affiliates of $7 million and $5 million as of December 31, 2019 and 2018 , respectively, that are included in receivables, net on the Consolidated Balance Sheets. MidAmerican Funding also had accounts payable to affiliates of $11 million and $12 million as of December 31, 2019 and 2018 , 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 $83 million and $156 million as of December 31, 2019 and 2018 , respectively. MidAmerican Funding received net cash receipts for federal and state income taxes from BHE totaling $456 million , $511 million and $472 million for the years ended December 31, 2019 , 2018 and 2017 , 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 $23 million and $20 million as of December 31, 2019 and 2018 , respectively, and similar amounts payable to affiliates totaled $47 million and $36 million as of December 31, 2019 and 2018 , respectively. 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 and its interest coverage ratio is not less than 2.2:1 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 , 2019 , 2018 and 2017 . Kern River Gas Transmission Company, an indirect subsidiary of BHE , provided natural gas transportation and other services to Nevada Power of $52 million , $58 million and $66 million for the years ended December 31 , 2019 , 2018 and 2017 . As of December 31 , 2019 and 2018 , 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 $2 million , $3 million and $3 million for the years ended December 31 , 2019 , 2018 and 2017 , respectively. Receivables associated with these services were $- million as of December 31 , 2019 and 2018 . PacifiCorp provided electricity and the sale of renewable energy credits to Nevada Power of $- million for the years ended December 31 , 2019 , 2018 and 2017 . Payables associated with these transactions were $-million as of December 31 , 2019 and 2018 . Nevada Power provided electricity to Sierra Pacific of $84 million , $91 million and $104 million for the years ended December 31 , 2019 , 2018 and 2017 , respectively. Receivables associated with these transactions were $5 million and $6 million as of December 31 , 2019 and 2018 , respectively. Nevada Power purchased electricity from Sierra Pacific of $25 million , $28 million and $21 million for the years ended December 31 , 2019 , 2018 and 2017 , respectively. Payables associated with these transactions were $1 million as of December 31 , 2019 and 2018 . 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 , $1 million and $- million for each of the years ending December 31 , 2019 , 2018 and 2017 , respectively. NV Energy provided services to Nevada Power of $9 million , $7 million and $10 million for the years ending December 31 , 2019 , 2018 and 2017 , respectively. Nevada Power provided services to Sierra Pacific of $26 million , $28 million and $27 million for the years ended December 31 , 2019 , 2018 and 2017 , respectively. Sierra Pacific provided services to Nevada Power of $14 million , $15 million and $17 million for the years ended December 31 , 2019 , 2018 and 2017 , respectively. As of December 31 , 2019 and 2018 , Nevada Power 's Consolidated Balance Sheets included amounts due to NV Energy of $26 million . There were no receivables due from NV Energy as of December 31 , 2019 and 2018 . As of December 31 , 2019 and 2018 , Nevada Power 's Consolidated Balance Sheets included receivables due from Sierra Pacific of $3 million and $5 million , respectively. There were no payables due to Sierra Pacific as of December 31 , 2019 and 2018 . 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. Federal income taxes receivable from NV Energy were $7 million as of December 31, 2019 and federal income taxes payable to NV Energy were $4 million as of December 31, 2018 . Nevada Power made cash payments of $113 million , $117 million and $89 million for federal income taxes for the years ended December 31 , 2019 , 2018 and 2017 , 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.

Employee Benefit Plans (Notes)

Employee Benefit Plans (Notes)	12 Months Ended
	Dec. 31, 2019
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 a restoration plan for certain executives of NV Energy. PacifiCorp, MidAmerican Energy and NV Energy also provide certain postretirement healthcare and life insurance benefits through various plans to eligible retirees. 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 2019 2018 2017 2019 2018 2017 Service cost $ 16 $ 21 $ 24 $ 8 $ 9 $ 9 Interest cost 111 105 116 27 24 29 Expected return on plan assets (154 ) (164 ) (160 ) (40 ) (41 ) (40 ) Settlement — 21 — — — — Net amortization 31 28 25 (6 ) (13 ) (14 ) Net periodic benefit cost (credit) $ 4 $ 11 $ 5 $ (11 ) $ (21 ) $ (16 ) 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 2019 2018 2019 2018 Plan assets at fair value, beginning of year $ 2,396 $ 2,761 $ 664 $ 736 Employer contributions 12 38 2 8 Participant contributions — — 9 8 Actual return on plan assets 456 (147 ) 122 (38 ) Settlement (22 ) (119 ) — — Benefits paid (186 ) (137 ) (55 ) (50 ) Plan assets at fair value, end of year $ 2,656 $ 2,396 $ 742 $ 664 The following table is a reconciliation of the benefit obligations for the years ended December 31 (in millions): Pension Other Postretirement 2019 2018 2019 2018 Benefit obligation, beginning of year $ 2,718 $ 3,006 $ 672 $ 721 Service cost 16 21 8 9 Interest cost 111 105 27 24 Participant contributions — — 9 8 Actuarial loss (gain) 242 (160 ) 12 (40 ) Amendment (1 ) 2 — — Settlement (22 ) (119 ) — — Benefits paid (186 ) (137 ) (55 ) (50 ) Benefit obligation, end of year $ 2,878 $ 2,718 $ 673 $ 672 Accumulated benefit obligation, end of year $ 2,867 $ 2,709 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 2018 2019 2018 Plan assets at fair value, end of year $ 2,656 $ 2,396 $ 742 $ 664 Benefit obligation, end of year 2,878 2,718 673 672 Funded status $ (222 ) $ (322 ) $ 69 $ (8 ) Amounts recognized on the Consolidated Balance Sheets: Other assets $ 73 $ 20 $ 76 $ 5 Other current liabilities (13 ) (13 ) — — Other long-term liabilities (282 ) (329 ) (7 ) (13 ) Amounts recognized $ (222 ) $ (322 ) $ 69 $ (8 ) 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 $252 million and $256 million as of December 31, 2019 and 2018 , 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 2019 2018 2019 2018 Fair value of plan assets $ 1,939 $ 1,752 $ 439 $ 417 Projected benefit obligation $ 2,227 $ 2,091 $ 446 $ 429 Accumulated benefit obligation $ 2,222 $ 2,085 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 2018 2019 2018 Net loss $ 653 $ 747 $ (23 ) $ 50 Prior service credit (2 ) — (14 ) (22 ) Regulatory deferrals 1 (1 ) 6 7 Total $ 652 $ 746 $ (31 ) $ 35 A reconciliation of the amounts not yet recognized as components of net periodic benefit cost for the years ended December 31, 2019 and 2018 is as follows (in millions): Accumulated Other Regulatory Regulatory Comprehensive Asset Liability Loss Total Pension Balance, December 31, 2017 $ 665 $ (43 ) $ 20 $ 642 Net loss (gain) arising during the year 114 43 (6 ) 151 Net prior service cost arising during the year — — 2 2 Settlement (21 ) — — (21 ) Net amortization (28 ) — — (28 ) Total 65 43 (4 ) 104 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 Accumulated Other Regulatory Regulatory Comprehensive Asset Liability Loss Total Other Postretirement Balance, December 31, 2017 $ 10 $ (26 ) $ — $ (16 ) Net loss arising during the year 23 14 1 38 Net amortization 11 2 — 13 Total 34 16 1 51 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 ) Plan Assumptions Weighted-average assumptions used to determine benefit obligations and net periodic benefit cost were as follows: Pension Other Postretirement 2019 2018 2017 2019 2018 2017 Benefit obligations as of December 31: Discount rate 3.32 % 4.25 % 3.60 % 3.24 % 4.21 % 3.57 % Rate of compensation increase 2.75 % 2.75 % 2.75 % NA NA NA Interest crediting rates for cash balance plan 2017 NA NA 2.49 % NA NA NA 2018 NA 3.38 % 3.06 % NA NA NA 2019 3.22 % 3.54 % 3.06 % NA NA NA 2020 2.94 % 3.54 % 2.72 % NA NA NA 2021 2.94 % 3.56 % 2.72 % NA NA NA 2022 3.02 % 3.56 % 2.72 % NA NA NA Net periodic benefit cost for the years ended December 31: Discount rate 4.25 % 3.60 % 4.06 % 4.21 % 3.57 % 4.01 % Expected return on plan assets 6.48 % 6.36 % 6.55 % 6.39 % 6.44 % 6.73 % Rate of compensation increase 2.75 % 2.75 % 2.75 % NA NA NA Interest crediting rate for cash balance plan 3.22 % 3.38 % 2.49 % 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. 2019 2018 Assumed healthcare cost trend rates as of December 31: Healthcare cost trend rate assumed for next year 6.50 % 6.80 % 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 $- million, respectively, during 2020 . Funding to the established pension trusts is based upon the actuarially determined costs of the plans 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. 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 2020 through 2024 and for the five years thereafter are summarized below (in millions): Projected Benefit Payments Other Pension Postretirement 2020 $ 233 $ 57 2021 218 56 2022 213 55 2023 212 54 2024 205 51 2025-2029 927 224 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 each plan's Pension and Employee Benefits Plans Administrative 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, 2019 : Other Pension Postretirement % % PacifiCorp: Debt securities (1) 30-43 33-37 Equity securities (1) 48-65 62-66 Limited partnership interests 6-12 1-3 MidAmerican Energy: Debt securities (1) 20-50 25-45 Equity securities (1) 60-80 45-80 Real estate funds 2-8 — Other 0-3 0-5 NV Energy: Debt securities (1) 53-77 40 Equity securities (1) 23-47 60 (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, 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 As of December 31, 2018: Cash equivalents $ 8 $ 41 $ 49 Debt securities: United States government obligations 160 — 160 International government obligations — 5 5 Corporate obligations — 373 373 Municipal obligations — 29 29 Agency, asset and mortgage-backed obligations — 123 123 Equity securities: United States companies 492 1 493 International companies 108 — 108 Investment funds (2) 119 — 119 Total assets in the fair value hierarchy $ 887 $ 572 1,459 Investment funds (2) measured at net asset value 792 Limited partnership interests (3) measured at net asset value 104 Real estate funds measured at net asset value 41 Total assets measured at fair value $ 2,396 (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 62% and 38% , respectively, for 2019 and 59% and 41% , respectively, for 2018 . Additionally, these funds are invested in United States and international securities of approximately 66% and 34% , respectively, for 2019 and 73% and 27% , respectively, for 2018 . (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, 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 236 — 236 Total assets in the fair value hierarchy $ 433 $ 135 568 Investment funds measured at net asset value 169 Limited partnership interests measured at net asset value 5 Total assets measured at fair value $ 742 As of December 31, 2018: Cash equivalents $ 10 $ 2 $ 12 Debt securities: United States government obligations 13 — 13 Corporate obligations — 42 42 Municipal obligations — 45 45 Agency, asset and mortgage-backed obligations — 30 30 Equity securities: United States companies 158 — 158 International companies 6 — 6 Investment funds (2) 202 1 203 Total assets in the fair value hierarchy $ 389 $ 120 509 Investment funds (2) measured at net asset value 149 Limited partnership interests (3) measured at net asset value 6 Total assets measured at fair value $ 664 (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 58% and 42% , respectively, for 2019 and 65% and 35% , respectively, for 2018 . Additionally, these funds are invested in United States and international securities of approximately 75% and 25% , respectively, for 2019 and 79% and 21% , respectively, for 2018 . (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 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 UK Plan included the following components for the years ended December 31 (in millions): 2019 2018 2017 Service cost $ 16 $ 19 $ 23 Interest cost 49 56 58 Expected return on plan assets (100 ) (101 ) (100 ) Settlement 26 44 31 Net amortization 46 45 63 Net periodic benefit cost $ 37 $ 63 $ 75 Funded Status The following table is a reconciliation of the fair value of plan assets for the years ended December 31 (in millions): 2019 2018 Plan assets at fair value, beginning of year $ 1,989 $ 2,368 Employer contributions 56 60 Participant contributions 1 1 Actual return on plan assets 194 (44 ) Settlement (99 ) (205 ) Benefits paid (71 ) (71 ) Foreign currency exchange rate changes 81 (120 ) Plan assets at fair value, end of year $ 2,151 $ 1,989 The following table is a reconciliation of the benefit obligation for the years ended December 31 (in millions): 2019 2018 Benefit obligation, beginning of year $ 1,833 $ 2,201 Service cost 16 19 Interest cost 49 56 Participant contributions 1 1 Actuarial loss (gain) 175 (87 ) Settlement (99 ) (182 ) Amendment — 8 Benefits paid (71 ) (71 ) Foreign currency exchange rate changes 115 (112 ) Benefit obligation, end of year $ 2,019 $ 1,833 Accumulated benefit obligation, end of year $ 1,786 $ 1,637 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): 2019 2018 Plan assets at fair value, end of year $ 2,151 $ 1,989 Benefit obligation, end of year 2,019 1,833 Funded status $ 132 $ 156 Amounts recognized on the Consolidated Balance Sheets: Other assets $ 132 $ 156 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): 2019 2018 Net loss $ 543 $ 472 Prior service cost 6 8 Total $ 549 $ 480 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): 2019 2018 Balance, beginning of year $ 480 $ 510 Net loss arising during the year 81 59 Net prior service cost arising during the year — 8 Settlement (26 ) (22 ) Net amortization (46 ) (45 ) Foreign currency exchange rate changes 60 (30 ) Total 69 (30 ) Balance, end of year $ 549 $ 480 Plan Assumptions Assumptions used to determine benefit obligations and net periodic benefit cost were as follows: 2019 2018 2017 Benefit obligations as of December 31: Discount rate 2.10 % 2.90 % 2.60 % Rate of compensation increase 3.30 % 3.55 % 3.45 % Rate of future price inflation 2.80 % 3.05 % 2.95 % Net periodic benefit cost for the years ended December 31: Discount rate 2.90 % 2.60 % 2.70 % Expected return on plan assets 5.10 % 4.90 % 5.00 % Rate of compensation increase 3.55 % 3.45 % 3.00 % Rate of future price inflation 3.05 % 2.95 % 3.00 % Contributions and Benefit Payments Employer contributions to the UK Plan are expected to be £43 million during 2020 . The expected benefit payments to participants in the UK Plan for 2020 through 2024 and for the five years thereafter excluding lump sum settlement elections, using the foreign currency exchange rate as of December 31, 2019 , are summarized below (in millions): 2020 $ 74 2021 75 2022 77 2023 79 2024 81 2025-2029 436 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, 2019 : % Debt securities (1) 50-55 Equity securities (1) 35-40 Real estate funds and other 5-15 (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, 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 As of December 31, 2018: Cash equivalents $ 3 $ 59 $ — $ 62 Debt securities: United Kingdom government obligations 891 — — 891 Equity securities: Investment funds (2) — 697 — 697 Real estate funds — — 239 239 Total $ 894 $ 756 $ 239 1,889 Investment funds (2) measured at net asset value 100 Total assets measured at fair value $ 1,989 (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 38% and 62% , respectively, for 2019 and 36% and 64% , respectively, for 2018 . 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 2019 2018 2017 Beginning balance $ 239 $ 230 $ 105 Actual return on plan assets still held at period end (5 ) 23 6 Purchases — — 104 Foreign currency exchange rate changes 9 (14 ) 15 Ending balance $ 243 $ 239 $ 230 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 $115 million , $112 million and $103 million for the years ended December 31, 2019 , 2018 and 2017 , respectively.
PacifiCorp [Member]
Defined Benefit Plan Disclosure [Line Items]
Employee Benefit Plans [Text Block]	Employee Benefit Plans PacifiCorp sponsors defined benefit pension and other postretirement benefit plans that cover the majority of its employees, as well as a defined contribution 401(k) employee savings plan ("401(k) Plan"). In addition, PacifiCorp contributes to a joint trustee pension plan and a subsidiary previously contributed to a multiemployer pension plan for benefits offered to certain bargaining units. Defined Benefit Plans PacifiCorp's pension plans include non-contributory defined benefit pension plans, collectively the PacifiCorp Retirement Plan ("Retirement Plan"), and the Supplemental Executive Retirement Plan ("SERP"). The Retirement Plan is closed to all non-union employees hired after January 1, 2008. All non-union Retirement Plan participants hired prior to January 1, 2008 that did not elect to receive equivalent fixed contributions to the 401(k) Plan effective January 1, 2009 earned benefits based on a cash balance formula through December 31, 2016. Effective January 1, 2017, non-union employee participants with a cash balance benefit in the Retirement Plan are no longer eligible to receive pay credits in their cash balance formula. In general for union employees, benefits under the Retirement Plan were frozen at various dates from December 31, 2007 through December 31, 2011 as they are now being provided with enhanced 401(k) Plan benefits. However, certain limited union Retirement Plan participants continue to earn benefits under the Retirement Plan based on the employee's years of service and a final average pay formula. The SERP was closed to new participants as of March 21, 2006 and froze future accruals for active participants as of December 31, 2014. During 2018 , the Retirement Plan incurred a settlement charge of $22 million as a result of excess lump sum distributions over the defined threshold for the year ended December 31, 2018 . PacifiCorp's other postretirement benefit plan provides healthcare and life insurance benefits to eligible retirees. 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 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 2019 2018 2017 2019 2018 2017 Service cost $ — $ — $ — $ 2 $ 2 $ 2 Interest cost 44 43 49 12 11 14 Expected return on plan assets (67 ) (72 ) (72 ) (21 ) (21 ) (21 ) Settlement — 22 — — — — Net amortization 11 13 14 — (6 ) (6 ) Net periodic benefit (credit) cost $ (12 ) $ 6 $ (9 ) $ (7 ) $ (14 ) $ (11 ) 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 2019 2018 2019 2018 Plan assets at fair value, beginning of year $ 942 $ 1,111 $ 297 $ 332 Employer contributions 4 4 1 1 Participant contributions — — 5 5 Actual return on plan assets 181 (52 ) 55 (16 ) Settlement — (52 ) — — Benefits paid (91 ) (69 ) (24 ) (25 ) Plan assets at fair value, end of year $ 1,036 $ 942 $ 334 $ 297 The following table is a reconciliation of the benefit obligations for the years ended December 31 (in millions): Pension Other Postretirement 2019 2018 2019 2018 Benefit obligation, beginning of year $ 1,105 $ 1,251 $ 298 $ 331 Service cost — — 2 2 Interest cost 44 43 12 11 Participant contributions — — 5 5 Actuarial loss (gain) 109 (68 ) 11 (26 ) Settlement — (52 ) — — Benefits paid (91 ) (69 ) (24 ) (25 ) Benefit obligation, end of year $ 1,167 $ 1,105 $ 304 $ 298 Accumulated benefit obligation, end of year $ 1,167 $ 1,105 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 2018 2019 2018 Plan assets at fair value, end of year $ 1,036 $ 942 $ 334 $ 297 Less - Benefit obligation, end of year 1,167 1,105 304 298 Funded status $ (131 ) $ (163 ) $ 30 $ (1 ) Amounts recognized on the Consolidated Balance Sheets: Other assets $ 7 $ 3 $ 30 $ — Other current liabilities (4 ) (4 ) — — Other long-term liabilities (134 ) (162 ) — (1 ) Amounts recognized $ (131 ) $ (163 ) $ 30 $ (1 ) The SERP has no plan assets; however, PacifiCorp has a Rabbi trust that holds 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 the Rabbi trust, net of amounts borrowed against the cash surrender value, plus the fair market value of other Rabbi trust investments, was $57 million and $52 million as of December 31, 2019 and 2018 , respectively. These assets are not included in the plan assets in the above table, but are reflected in cash and cash equivalents, totaling $- million and $1 million as of December 31, 2019 and 2018 , respectively, and noncurrent other assets, totaling $57 million and $51 million as of December 31, 2019 and 2018 , respectively, on the Consolidated Balance Sheets. The projected benefit obligation and the accumulated benefit obligation for the pension plan were both in excess of the fair value of the plan assets as of December 31, 2019 . 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 2018 2019 2018 Net loss (gain) $ 442 $ 461 $ (26 ) $ (2 ) Regulatory deferrals 1 (1 ) 6 7 Total $ 443 $ 460 $ (20 ) $ 5 A reconciliation of the amounts not yet recognized as components of net periodic benefit cost for the years ended December 31, 2019 and 2018 is as follows (in millions): Accumulated Other Regulatory Comprehensive Asset Loss Total Pension Balance, December 31, 2017 $ 418 $ 20 $ 438 Net loss (gain) arising during the year 59 (2 ) 57 Net amortization (12 ) (1 ) (13 ) Settlement (22 ) — (22 ) Total 25 (3 ) 22 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 Regulatory Asset (Liability) Other Postretirement Balance, December 31, 2017 $ (11 ) Net loss arising during the year 10 Net amortization 6 Total 16 Balance, December 31, 2018 5 Net gain arising during the year (25 ) Net amortization — Total (25 ) Balance, December 31, 2019 $ (20 ) Plan Assumptions Weighted-average assumptions used to determine benefit obligations and net periodic benefit cost were as follows: Pension Other Postretirement 2019 2018 2017 2019 2018 2017 Benefit obligations as of December 31: Discount rate 3.25 % 4.25 % 3.60 % 3.20 % 4.25 % 3.60 % Rate of compensation increase N/A N/A N/A N/A N/A N/A Interest crediting rates for cash balance plan (1)(2)(3) 2.27 % 3.40 % 1.61 % N/A N/A N/A Net periodic benefit cost for the years ended December 31: Discount rate 4.25 % 3.60 % 4.05 % 4.25 % 3.60 % 4.05 % Expected return on plan assets 7.00 7.00 7.25 6.86 6.86 7.25 Rate of compensation increase N/A N/A N/A N/A N/A N/A (1) 2019 Cash Balance Interest Crediting Rate assumption is 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. (2) 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. (3) 2017 Cash Balance Interest Crediting Rate assumption was 2.26% for 2018-2019 and 1.60% for 2020+ for nonunion participants and 2.78% for 2018-2019 and 2.60% for 2020+ for union participants. In establishing its assumption as to the expected return on plan assets, PacifiCorp utilizes the asset allocation and return assumptions for each asset class based on historical performance and forward-looking views of the financial markets. As a result of a plan amendment effective on January 1, 2017, the benefit obligation for the Retirement Plan is no longer affected by future increases in compensation. As a result of a labor settlement reached with UMWA in December 2014, the benefit obligation for the other postretirement plan is no longer affected by healthcare cost trends. Contributions and Benefit Payments Employer contributions to the pension and other postretirement benefit plans are expected to be $4 million and $- million, respectively, during 2020 . Funding to PacifiCorp's Retirement 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 ("ERISA") and the Pension Protection Act of 2006, as amended ("PPA"). PacifiCorp considers contributing additional amounts from time to time in order to achieve certain funding levels specified under the PPA. PacifiCorp evaluates a variety of factors, including funded status, income tax laws and regulatory requirements, in determining contributions to its other postretirement benefit plan. The expected benefit payments to participants in PacifiCorp's pension and other postretirement benefit plans for 2020 through 2024 and for the five years thereafter are summarized below (in millions): Projected Benefit Payments Pension Other Postretirement 2020 $ 112 $ 27 2021 98 24 2022 94 23 2023 89 23 2024 83 21 2025-2029 350 94 Plan Assets Investment Policy and Asset Allocations PacifiCorp'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 PacifiCorp Pension 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 PacifiCorp's pension and other postretirement benefit plan assets are as follows as of December 31, 2019 : Pension (1) Other Postretirement (1) % % Debt securities (2) 30 - 43 33 - 37 Equity securities (2) 48 - 65 62 - 66 Limited partnership interests 6 - 12 1 - 3 (1) PacifiCorp's Retirement Plan trust 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 Measurements 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, 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 As of December 31, 2018: Cash equivalents $ — $ 11 $ — $ 11 Debt securities: United States government obligations 4 — — 4 International government obligations 1 1 Corporate obligations — 88 — 88 Municipal obligations — 10 — 10 Agency, asset and mortgage-backed obligations — 43 — 43 Equity securities: United States companies 327 — — 327 International companies 15 — — 15 Investment funds (2) 54 — — 54 Total assets in the fair value hierarchy $ 400 $ 153 $ — 553 Investment funds (2) measured at net asset value 285 Limited partnership interests (3) measured at net asset value 104 Investments at fair value $ 942 (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 55% and 45% respectively, for both 2019 and 2018 , and are invested in United States and international securities of approximately 51% and 49% , respectively, for 2019 and 68% and 32% , respectively, for 2018 . (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 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, 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 As of December 31, 2018: Cash and cash equivalents $ 4 $ 1 $ — $ 5 Debt securities: United States government obligations 3 — — 3 Corporate obligations — 23 — 23 Municipal obligations — 2 — 2 Agency, asset and mortgage-backed obligations — 17 — 17 Equity securities: United States companies 83 — — 83 International companies 4 — — 4 Investment funds (2) 38 — — 38 Total assets in the fair value hierarchy 132 43 — 175 Investment funds (2) measured at net asset value 116 Limited partnership interests (3) measured at net asset value 6 Investments at fair value $ 297 (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 56% and 44% , respectively, for 2019 and 59% and 41% , respectively, for 2018 , and are invested in United States and international securities of approximately 79% and 21% , respectively, for 2019 and 90% and 10% , respectively, for 2018 . (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. Multiemployer and Joint Trustee Pension Plans PacifiCorp contributes to the PacifiCorp/IBEW Local 57 Retirement Trust Fund ("Local 57 Trust Fund") (plan number 001) and its subsidiary, Energy West Mining Company, previously contributed to the UMWA 1974 Pension Plan (plan number 002). Contributions to these pension plans are based on the terms of collective bargaining agreements. As a result of the Utah Mine Disposition and United Mine Workers of America ("UMWA") labor settlement, PacifiCorp's subsidiary, Energy West Mining Company, triggered involuntary withdrawal from the UMWA 1974 Pension Plan in June 2015 when the UMWA employees ceased performing work for the subsidiary. PacifiCorp recorded its estimate of the withdrawal obligation in December 2014 when withdrawal was considered probable and deferred the portion of the obligation considered probable of recovery to a regulatory asset. PacifiCorp has subsequently revised its estimate due to changes in facts and circumstances for a withdrawal occurring by July 2015. As communicated in a letter received in August 2016, the plan trustees determined a withdrawal liability of $115 million . Energy West Mining Company began making installment payments in November 2016 and has the option to elect a lump sum payment to settle the withdrawal obligation. The ultimate amount paid by Energy West Mining Company to settle the obligation is dependent on a variety of factors, including the results of ongoing negotiations with the plan trustees. The Local 57 Trust Fund is a joint trustee plan such that the board of trustees is represented by an equal number of trustees from PacifiCorp and the union. The Local 57 Trust Fund was established pursuant to the provisions of the Taft-Hartley Act and although formed with the ability for other employers to participate in the plan, there are no other employers that participate in this plan. The risk of participating in multiemployer pension plans generally differs from single-employer plans in that assets are pooled such that contributions by one employer may be used to provide benefits to employees of other participating employers and plan assets cannot revert back to employers. If an employer ceases participation in the plan, the employer may be obligated to pay a withdrawal liability based on the participants' unfunded, vested benefits in the plan. This occurred as a result of Energy West Mining Company's withdrawal from the UMWA 1974 Pension Plan. If participating employers withdraw from a multiemployer plan, the unfunded obligations of the plan may be borne by the remaining participating employers. 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 2019 2018 2017 Funding improvement plan Surcharge imposed under PPA (1) 2019 2018 2017 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 $ 7 $ 7 $ 7 2017, 2016, 2015 (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, 2017, 2016 and 2015. Information for the plan year beginning July 1, 2018 is not yet available. The current collective bargaining agreements governing the Local 57 Trust Fund expire in 2023. Defined Contribution Plan PacifiCorp's 401(k) plan covers substantially all employees. PacifiCorp's matching contributions are based on each participant's level of contribution and, as of January 1, 2019 , all participants receive contributions based on eligible pre-tax annual compensation. Contributions cannot exceed the maximum allowable for tax purposes. PacifiCorp's contributions to the 401(k) plan were $40 million , $39 million and $39 million for the years ended December 31, 2019 , 2018 and 2017 , respectively.
MidAmerican Energy Company [Member]
Defined Benefit Plan Disclosure [Line Items]
Employee Benefit Plans [Text Block]	Employee Benefit Plans 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. 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 2019 , 2018 and 2017 , MidAmerican Energy's share of the pension net periodic benefit (credit) cost was $(8) million , $(9) million and $(6) million , respectively. MidAmerican Energy's share of the other postretirement net periodic benefit (credit) cost in 2019 , 2018 and 2017 totaled $1 million , $(2) million and $(1) 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 2019 2018 2017 2019 2018 2017 Service cost $ 6 $ 9 $ 9 $ 5 $ 5 $ 5 Interest cost 30 28 31 10 8 9 Expected return on plan assets (41 ) (44 ) (44 ) (13 ) (13 ) (14 ) Settlement — (1 ) — — — — Net amortization 1 2 2 (3 ) (4 ) (4 ) Net periodic benefit (credit) cost $ (4 ) $ (6 ) $ (2 ) $ (1 ) $ (4 ) $ (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 2019 2018 2019 2018 Plan assets at fair value, beginning of year $ 644 $ 745 $ 247 $ 277 Employer contributions 7 7 1 1 Participant contributions — — 2 1 Actual return on plan assets 123 (39 ) 42 (17 ) Settlement — (37 ) — — Benefits paid (57 ) (32 ) (20 ) (15 ) Plan assets at fair value, end of year $ 717 $ 644 $ 272 $ 247 The following table is a reconciliation of the benefit obligations for the years ended December 31 (in millions): Pension Other Postretirement 2019 2018 2019 2018 Benefit obligation, beginning of year $ 736 $ 799 $ 242 $ 246 Service cost 6 9 5 5 Interest cost 30 28 10 8 Participant contributions — — 2 1 Actuarial (gain) loss 48 (33 ) (13 ) (3 ) Plan amendments — 2 — — Settlement — (37 ) — — Benefits paid (57 ) (32 ) (20 ) (15 ) Benefit obligation, end of year $ 763 $ 736 $ 226 $ 242 Accumulated benefit obligation, end of year $ 758 $ 733 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 2019 2018 2019 2018 Plan assets at fair value, end of year $ 717 $ 644 $ 272 $ 247 Less - Benefit obligation, end of year 763 736 226 242 Funded status $ (46 ) $ (92 ) $ 46 $ 5 Amounts recognized on the Balance Sheets: Other assets $ 66 $ 17 $ 46 $ 5 Other current liabilities (7 ) (7 ) — — Other liabilities (105 ) (102 ) — — Amounts recognized $ (46 ) $ (92 ) $ 46 $ 5 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 $122 million and $116 million as of December 31, 2019 and 2018 . 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 $112 million and $112 million for 2019 and $109 million and $109 million for 2018, 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 2019 2018 2019 2018 Net loss (gain) $ 6 $ 40 $ 4 $ 48 Prior service cost (credit) (1 ) 1 (14 ) (20 ) Total $ 5 $ 41 $ (10 ) $ 28 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, 2019 and 2018 is as follows (in millions): Regulatory Asset Regulatory Liability Receivables (Payables) with Affiliates Total Pension Balance, December 31, 2017 $ 24 $ (41 ) $ 7 $ (10 ) Net loss arising during the year 2 41 9 52 Net amortization (2 ) — — (2 ) Settlement 1 — — 1 Total 1 41 9 51 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 Regulatory Asset Receivables (Payables) with Affiliates Total Other Postretirement Balance, December 31, 2017 $ 14 $ (16 ) $ (2 ) Net loss arising during the year 20 6 26 Net amortization 3 1 4 Total 23 7 30 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 ) Actuarial gains for 2019 impacting the December 31, 2019 funded status for the pension and other postretirement plans are due to higher than assumed actual return on plan assets, offset by a decrease in the discount rate assumptions from that assumed at December 31, 2018. Plan Assumptions Assumptions used to determine benefit obligations and net periodic benefit cost were as follows: Pension Other Postretirement 2019 2018 2017 2019 2018 2017 Benefit obligations as of December 31: Discount rate 3.40 % 4.25 % 3.60 % 3.20 % 4.15 % 3.50 % Rate of compensation increase 2.75 % 2.75 % 2.75 % N/A N/A N/A Interest crediting rates for cash balance plan 2017 N/A N/A 1.44 % N/A N/A N/A 2018 N/A 2.26 % 2.26 % N/A N/A N/A 2019 3.40 % 3.40 % 2.26 % N/A N/A N/A 2020 2.27 % 3.40 % 1.60 % N/A N/A N/A 2021 2.27 % 3.40 % 1.60 % N/A N/A N/A 2022 and beyond 2.27 % 3.40 % 1.60 % N/A N/A N/A Net periodic benefit cost for the years ended December 31: Discount rate 4.25 % 3.60 % 4.10 % 4.15 % 3.50 % 3.90 % Expected return on plan assets (1) 6.50 % 6.50 % 6.75 % 6.25 % 6.25 % 6.50 % Rate of compensation increase 2.75 % 2.75 % 2.75 % N/A N/A N/A Interest crediting rates for cash balance plan 3.40 % 2.26 % 1.44 % N/A N/A N/A (1) Amounts reflected are pre-tax values. Assumed after-tax returns for a taxable, non-union other postretirement plan were 4.62% for 2019 , 4.13% for 2018 , and 4.81% for 2017 . 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. 2019 2018 Assumed healthcare cost trend rates as of December 31: Healthcare cost trend rate assumed for next year 6.50 % 6.80 % 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 $1 million , respectively, during 2020 . 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 2020 through 2024 and for the five years thereafter are summarized below (in millions): Projected Benefit Payments Pension Other Postretirement 2020 $ 64 $ 20 2021 63 22 2022 61 22 2023 58 21 2024 56 20 2025-2029 244 84 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 MidAmerican Energy Pension and Employee Benefits Plans Administrative 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, 2019 : Pension Other Postretirement % % Debt securities (1) 20-50 25-45 Equity securities (1) 60-80 45-80 Real estate funds 2-8 — Other 0-3 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, 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 As of December 31, 2018: Cash equivalents $ — $ 20 $ — $ 20 Debt securities: United States government obligations 6 — — 6 Corporate obligations — 63 — 63 Municipal obligations — 6 — 6 Agency, asset and mortgage-backed obligations — 37 — 37 Equity securities: United States companies 111 — — 111 International companies 35 — — 35 Investment funds (2) 65 — — 65 Total assets in the hierarchy $ 217 $ 126 $ — 343 Investment funds (2) measured at net asset value 260 Real estate funds measured at net asset value 41 Total assets measured at fair value $ 644 (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 69% and 31% , respectively, for 2019 and 65% and 35% , respectively, for 2018 . Additionally, these funds are invested in United States and international securities of approximately 74% and 26% , respectively, for 2019 and 74% and 26% , respectively, for 2018 . 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, 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 As of December 31, 2018: Cash equivalents $ 5 $ — $ — $ 5 Debt securities: United States government obligations 6 — — 6 Corporate obligations — 12 — 12 Municipal obligations — 43 — 43 Agency, asset and mortgage-backed obligations — 12 — 12 Equity securities: United States companies 73 — — 73 Investment funds (2) 96 — — 96 Total assets measured at fair value $ 180 $ 67 $ — $ 247 (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 77% and 23% , respectively, for 2019 and 78% and 22% , respectively, for 2018 . Additionally, these funds are invested in United States and international securities of approximately 42% and 58% , respectively, for 2019 and 41% and 59% , respectively, for 2018 . 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 Energy sponsors a defined contribution plan ("401(k) plan") covering substantially all employees. MidAmerican Energy's 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. Certain participants now receive enhanced benefits in the 401(k) plan and no longer accrue benefits in the noncontributory defined benefit pension plans. MidAmerican Energy's contributions to the plan were $23 million , $22 million , and $20 million for the years ended December 31, 2019 , 2018 and 2017 , respectively.
MidAmerican Funding, LLC and Subsidiaries [Domain]
Defined Benefit Plan Disclosure [Line Items]
Employee Benefit Plans [Text Block]	Employee Benefit Plans 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): 2019 2018 2017 Pension costs $ 4 $ 3 $ 4 Other postretirement costs (2 ) (2 ) (3 )

Retirement Plan and Postretirem

Retirement Plan and Postretirement Benefits Retirement Plan and Postretirement Benefits (Notes)	12 Months Ended
	Dec. 31, 2019
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 a restoration plan for certain executives of NV Energy. PacifiCorp, MidAmerican Energy and NV Energy also provide certain postretirement healthcare and life insurance benefits through various plans to eligible retirees. 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 2019 2018 2017 2019 2018 2017 Service cost $ 16 $ 21 $ 24 $ 8 $ 9 $ 9 Interest cost 111 105 116 27 24 29 Expected return on plan assets (154 ) (164 ) (160 ) (40 ) (41 ) (40 ) Settlement — 21 — — — — Net amortization 31 28 25 (6 ) (13 ) (14 ) Net periodic benefit cost (credit) $ 4 $ 11 $ 5 $ (11 ) $ (21 ) $ (16 ) 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 2019 2018 2019 2018 Plan assets at fair value, beginning of year $ 2,396 $ 2,761 $ 664 $ 736 Employer contributions 12 38 2 8 Participant contributions — — 9 8 Actual return on plan assets 456 (147 ) 122 (38 ) Settlement (22 ) (119 ) — — Benefits paid (186 ) (137 ) (55 ) (50 ) Plan assets at fair value, end of year $ 2,656 $ 2,396 $ 742 $ 664 The following table is a reconciliation of the benefit obligations for the years ended December 31 (in millions): Pension Other Postretirement 2019 2018 2019 2018 Benefit obligation, beginning of year $ 2,718 $ 3,006 $ 672 $ 721 Service cost 16 21 8 9 Interest cost 111 105 27 24 Participant contributions — — 9 8 Actuarial loss (gain) 242 (160 ) 12 (40 ) Amendment (1 ) 2 — — Settlement (22 ) (119 ) — — Benefits paid (186 ) (137 ) (55 ) (50 ) Benefit obligation, end of year $ 2,878 $ 2,718 $ 673 $ 672 Accumulated benefit obligation, end of year $ 2,867 $ 2,709 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 2018 2019 2018 Plan assets at fair value, end of year $ 2,656 $ 2,396 $ 742 $ 664 Benefit obligation, end of year 2,878 2,718 673 672 Funded status $ (222 ) $ (322 ) $ 69 $ (8 ) Amounts recognized on the Consolidated Balance Sheets: Other assets $ 73 $ 20 $ 76 $ 5 Other current liabilities (13 ) (13 ) — — Other long-term liabilities (282 ) (329 ) (7 ) (13 ) Amounts recognized $ (222 ) $ (322 ) $ 69 $ (8 ) 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 $252 million and $256 million as of December 31, 2019 and 2018 , 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 2019 2018 2019 2018 Fair value of plan assets $ 1,939 $ 1,752 $ 439 $ 417 Projected benefit obligation $ 2,227 $ 2,091 $ 446 $ 429 Accumulated benefit obligation $ 2,222 $ 2,085 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 2018 2019 2018 Net loss $ 653 $ 747 $ (23 ) $ 50 Prior service credit (2 ) — (14 ) (22 ) Regulatory deferrals 1 (1 ) 6 7 Total $ 652 $ 746 $ (31 ) $ 35 A reconciliation of the amounts not yet recognized as components of net periodic benefit cost for the years ended December 31, 2019 and 2018 is as follows (in millions): Accumulated Other Regulatory Regulatory Comprehensive Asset Liability Loss Total Pension Balance, December 31, 2017 $ 665 $ (43 ) $ 20 $ 642 Net loss (gain) arising during the year 114 43 (6 ) 151 Net prior service cost arising during the year — — 2 2 Settlement (21 ) — — (21 ) Net amortization (28 ) — — (28 ) Total 65 43 (4 ) 104 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 Accumulated Other Regulatory Regulatory Comprehensive Asset Liability Loss Total Other Postretirement Balance, December 31, 2017 $ 10 $ (26 ) $ — $ (16 ) Net loss arising during the year 23 14 1 38 Net amortization 11 2 — 13 Total 34 16 1 51 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 ) Plan Assumptions Weighted-average assumptions used to determine benefit obligations and net periodic benefit cost were as follows: Pension Other Postretirement 2019 2018 2017 2019 2018 2017 Benefit obligations as of December 31: Discount rate 3.32 % 4.25 % 3.60 % 3.24 % 4.21 % 3.57 % Rate of compensation increase 2.75 % 2.75 % 2.75 % NA NA NA Interest crediting rates for cash balance plan 2017 NA NA 2.49 % NA NA NA 2018 NA 3.38 % 3.06 % NA NA NA 2019 3.22 % 3.54 % 3.06 % NA NA NA 2020 2.94 % 3.54 % 2.72 % NA NA NA 2021 2.94 % 3.56 % 2.72 % NA NA NA 2022 3.02 % 3.56 % 2.72 % NA NA NA Net periodic benefit cost for the years ended December 31: Discount rate 4.25 % 3.60 % 4.06 % 4.21 % 3.57 % 4.01 % Expected return on plan assets 6.48 % 6.36 % 6.55 % 6.39 % 6.44 % 6.73 % Rate of compensation increase 2.75 % 2.75 % 2.75 % NA NA NA Interest crediting rate for cash balance plan 3.22 % 3.38 % 2.49 % 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. 2019 2018 Assumed healthcare cost trend rates as of December 31: Healthcare cost trend rate assumed for next year 6.50 % 6.80 % 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 $- million, respectively, during 2020 . Funding to the established pension trusts is based upon the actuarially determined costs of the plans 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. 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 2020 through 2024 and for the five years thereafter are summarized below (in millions): Projected Benefit Payments Other Pension Postretirement 2020 $ 233 $ 57 2021 218 56 2022 213 55 2023 212 54 2024 205 51 2025-2029 927 224 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 each plan's Pension and Employee Benefits Plans Administrative 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, 2019 : Other Pension Postretirement % % PacifiCorp: Debt securities (1) 30-43 33-37 Equity securities (1) 48-65 62-66 Limited partnership interests 6-12 1-3 MidAmerican Energy: Debt securities (1) 20-50 25-45 Equity securities (1) 60-80 45-80 Real estate funds 2-8 — Other 0-3 0-5 NV Energy: Debt securities (1) 53-77 40 Equity securities (1) 23-47 60 (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, 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 As of December 31, 2018: Cash equivalents $ 8 $ 41 $ 49 Debt securities: United States government obligations 160 — 160 International government obligations — 5 5 Corporate obligations — 373 373 Municipal obligations — 29 29 Agency, asset and mortgage-backed obligations — 123 123 Equity securities: United States companies 492 1 493 International companies 108 — 108 Investment funds (2) 119 — 119 Total assets in the fair value hierarchy $ 887 $ 572 1,459 Investment funds (2) measured at net asset value 792 Limited partnership interests (3) measured at net asset value 104 Real estate funds measured at net asset value 41 Total assets measured at fair value $ 2,396 (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 62% and 38% , respectively, for 2019 and 59% and 41% , respectively, for 2018 . Additionally, these funds are invested in United States and international securities of approximately 66% and 34% , respectively, for 2019 and 73% and 27% , respectively, for 2018 . (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, 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 236 — 236 Total assets in the fair value hierarchy $ 433 $ 135 568 Investment funds measured at net asset value 169 Limited partnership interests measured at net asset value 5 Total assets measured at fair value $ 742 As of December 31, 2018: Cash equivalents $ 10 $ 2 $ 12 Debt securities: United States government obligations 13 — 13 Corporate obligations — 42 42 Municipal obligations — 45 45 Agency, asset and mortgage-backed obligations — 30 30 Equity securities: United States companies 158 — 158 International companies 6 — 6 Investment funds (2) 202 1 203 Total assets in the fair value hierarchy $ 389 $ 120 509 Investment funds (2) measured at net asset value 149 Limited partnership interests (3) measured at net asset value 6 Total assets measured at fair value $ 664 (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 58% and 42% , respectively, for 2019 and 65% and 35% , respectively, for 2018 . Additionally, these funds are invested in United States and international securities of approximately 75% and 25% , respectively, for 2019 and 79% and 21% , respectively, for 2018 . (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 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 UK Plan included the following components for the years ended December 31 (in millions): 2019 2018 2017 Service cost $ 16 $ 19 $ 23 Interest cost 49 56 58 Expected return on plan assets (100 ) (101 ) (100 ) Settlement 26 44 31 Net amortization 46 45 63 Net periodic benefit cost $ 37 $ 63 $ 75 Funded Status The following table is a reconciliation of the fair value of plan assets for the years ended December 31 (in millions): 2019 2018 Plan assets at fair value, beginning of year $ 1,989 $ 2,368 Employer contributions 56 60 Participant contributions 1 1 Actual return on plan assets 194 (44 ) Settlement (99 ) (205 ) Benefits paid (71 ) (71 ) Foreign currency exchange rate changes 81 (120 ) Plan assets at fair value, end of year $ 2,151 $ 1,989 The following table is a reconciliation of the benefit obligation for the years ended December 31 (in millions): 2019 2018 Benefit obligation, beginning of year $ 1,833 $ 2,201 Service cost 16 19 Interest cost 49 56 Participant contributions 1 1 Actuarial loss (gain) 175 (87 ) Settlement (99 ) (182 ) Amendment — 8 Benefits paid (71 ) (71 ) Foreign currency exchange rate changes 115 (112 ) Benefit obligation, end of year $ 2,019 $ 1,833 Accumulated benefit obligation, end of year $ 1,786 $ 1,637 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): 2019 2018 Plan assets at fair value, end of year $ 2,151 $ 1,989 Benefit obligation, end of year 2,019 1,833 Funded status $ 132 $ 156 Amounts recognized on the Consolidated Balance Sheets: Other assets $ 132 $ 156 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): 2019 2018 Net loss $ 543 $ 472 Prior service cost 6 8 Total $ 549 $ 480 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): 2019 2018 Balance, beginning of year $ 480 $ 510 Net loss arising during the year 81 59 Net prior service cost arising during the year — 8 Settlement (26 ) (22 ) Net amortization (46 ) (45 ) Foreign currency exchange rate changes 60 (30 ) Total 69 (30 ) Balance, end of year $ 549 $ 480 Plan Assumptions Assumptions used to determine benefit obligations and net periodic benefit cost were as follows: 2019 2018 2017 Benefit obligations as of December 31: Discount rate 2.10 % 2.90 % 2.60 % Rate of compensation increase 3.30 % 3.55 % 3.45 % Rate of future price inflation 2.80 % 3.05 % 2.95 % Net periodic benefit cost for the years ended December 31: Discount rate 2.90 % 2.60 % 2.70 % Expected return on plan assets 5.10 % 4.90 % 5.00 % Rate of compensation increase 3.55 % 3.45 % 3.00 % Rate of future price inflation 3.05 % 2.95 % 3.00 % Contributions and Benefit Payments Employer contributions to the UK Plan are expected to be £43 million during 2020 . The expected benefit payments to participants in the UK Plan for 2020 through 2024 and for the five years thereafter excluding lump sum settlement elections, using the foreign currency exchange rate as of December 31, 2019 , are summarized below (in millions): 2020 $ 74 2021 75 2022 77 2023 79 2024 81 2025-2029 436 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, 2019 : % Debt securities (1) 50-55 Equity securities (1) 35-40 Real estate funds and other 5-15 (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, 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 As of December 31, 2018: Cash equivalents $ 3 $ 59 $ — $ 62 Debt securities: United Kingdom government obligations 891 — — 891 Equity securities: Investment funds (2) — 697 — 697 Real estate funds — — 239 239 Total $ 894 $ 756 $ 239 1,889 Investment funds (2) measured at net asset value 100 Total assets measured at fair value $ 1,989 (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 38% and 62% , respectively, for 2019 and 36% and 64% , respectively, for 2018 . 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 2019 2018 2017 Beginning balance $ 239 $ 230 $ 105 Actual return on plan assets still held at period end (5 ) 23 6 Purchases — — 104 Foreign currency exchange rate changes 9 (14 ) 15 Ending balance $ 243 $ 239 $ 230 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 $115 million , $112 million and $103 million for the years ended December 31, 2019 , 2018 and 2017 , 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 year ended December 31, 2019 and contributed $19 million and $1 million to the Qualified Pension Plan for the years ended December 31 , 2018 and 2017 , respectively. Nevada Power contributed $ 1 million to the Non-Qualified Pension Plans for the years ended December 31 , 2019 , 2018 and 2017 . Nevada Power did not make any contributions to the Other Postretirement Plans for the years ended December 31 , 2019 , 2018 and 2017 . 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 payable to NV Energy are included on the Consolidated Balance Sheets and consist of the following as of December 31 (in millions): 2019 2018 Qualified Pension Plan - Other long-term liabilities $ 18 $ 26 Non-Qualified Pension Plans: Other current liabilities 1 1 Other long-term liabilities 9 9 Other Postretirement Plans - Other long-term liabilities 2 1
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 Plans Sierra 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 year ended December 31, 2019 and contributed $6 million and $1 million to the Qualified Pension Plan for the years ended December 31 , 2018 and 2017 , respectively. Sierra Pacific contributed $ 1 million to the Non-Qualified Pension Plans for the years ended December 31 , 2019 , 2018 and 2017 . Sierra Pacific contributed $- million, $ 6 million and $4 million to the Other Postretirement Plans for the years ended December 31 , 2019 , 2018 and 2017 , respectively. 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 payable to NV Energy are included on the Balance Sheets and consist of the following as of December 31 (in millions): 2019 2018 Qualified Pension Plan - Other long-term liabilities $ 4 $ 19 Non-Qualified Pension Plans: Other current liabilities 1 1 Other long-term liabilities 8 7 Other Postretirement Plans - Other long-term liabilities 7 13

Asset Retirement Obligations (N

Asset Retirement Obligations (Notes)	12 Months Ended
	Dec. 31, 2019
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, 2019 and 2018 . The following table presents the Company's ARO liabilities by asset type as of December 31 (in millions): 2019 2018 Fossil fuel facilities $ 623 $ 371 Quad Cities Station 358 345 Wind generating facilities 211 174 Offshore pipeline facilities 15 33 Solar generating facilities 21 20 Other 44 42 Total asset retirement obligations $ 1,272 $ 985 Quad Cities Station nuclear decommissioning trust funds $ 599 $ 504 The following table reconciles the beginning and ending balances of the Company's ARO liabilities for the years ended December 31 (in millions): 2019 2018 Beginning balance $ 985 $ 954 Change in estimated costs 257 10 Additions 43 28 Retirements (61 ) (45 ) Accretion 48 38 Ending balance $ 1,272 $ 985 Reflected as: Other current liabilities $ 167 $ 43 Other long-term liabilities 1,105 942 Total ARO liability $ 1,272 $ 985 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. In January 2018, MidAmerican Energy completed groundwater testing at its coal combustion residuals ("CCR") surface impoundments. Based on this information, MidAmerican Energy discontinued sending CCR to surface impoundments effective April 2018 and initiated analysis of additional actions to be taken. As a result of that analysis, MidAmerican Energy will remove all CCR material located below the water table and cap the material in such facilities, which is a more extensive closure activity than previously assumed. In the first quarter of 2019, MidAmerican Energy increased the asset retirement obligations 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 $1,019 million and $994 million as of December 31, 2019 and 2018 , respectively. The following table reconciles the beginning and ending balances of PacifiCorp's ARO liabilities for the years ended December 31 (in millions): 2019 2018 Beginning balance $ 227 $ 215 Change in estimated costs 27 9 Additions 9 — Retirements (15 ) (5 ) Accretion 9 8 Ending balance $ 257 $ 227 Reflected as: Other current liabilities $ 19 $ 21 Other long-term liabilities 238 206 $ 257 $ 227 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]	Asset Retirement Obligations 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 $572 million and $708 million as of December 31, 2019 and 2018 , respectively. The following table presents MidAmerican Energy's ARO liabilities by asset type as of December 31 (in millions): 2019 2018 Quad Cities Station $ 358 $ 345 Fossil-fueled generating facilities 325 93 Wind-powered generating facilities 154 123 Other 2 1 Total asset retirement obligations $ 839 $ 562 Quad Cities Station nuclear decommissioning trust funds (1) $ 599 $ 504 (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): 2019 2018 Beginning balance $ 562 $ 559 Change in estimated costs 234 (10 ) Additions 27 17 Retirements (14 ) (28 ) Accretion 30 24 Ending balance $ 839 $ 562 Reflected as: Other current liabilities $ 135 $ 10 Asset retirement obligations 704 552 $ 839 $ 562 In January 2018, MidAmerican Energy completed groundwater testing at its coal combustion residuals ("CCR") surface impoundments. Based on this information, MidAmerican Energy discontinued sending CCR to surface impoundments effective April 2018 and initiated analysis of additional actions to be taken. As a result of that analysis, MidAmerican Energy will remove all CCR material located below the water table and cap the material in such facilities, which is a more extensive closure activity than previously assumed. In the first quarter of 2019, MidAmerican Energy increased the asset retirement obligations 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.
MidAmerican Funding, LLC and Subsidiaries [Domain]
Asset Retirement Obligations Disclosure [Line Items]
Asset Retirement Obligations [Text Block]	Asset Retirement Obligations 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 $332 million and $320 million as of December 31 , 2019 and 2018 , respectively. The following table presents Nevada Power 's ARO liabilities by asset type as of December 31 (in millions): 2019 2018 Waste water remediation $ 37 $ 37 Evaporative ponds and dry ash landfills 12 12 Asbestos — 5 Solar 2 2 Other 23 27 Total asset retirement obligations $ 74 $ 83 The following table reconciles the beginning and ending balances of Nevada Power 's ARO liabilities for the years ended December 31 (in millions): 2019 2018 Beginning balance $ 83 $ 80 Change in estimated costs 6 11 Retirements (19 ) (11 ) Accretion 4 3 Ending balance $ 74 $ 83 Reflected as: Other current liabilities $ 14 $ 13 Other long-term liabilities 60 70 $ 74 $ 83 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 $217 million and $210 million as of December 31 , 2019 and 2018 , respectively. The following table presents Sierra Pacific 's ARO liabilities by asset type as of December 31 (in millions): 2019 2018 Asbestos $ 5 $ 5 Evaporative ponds and dry ash landfills 2 2 Other 3 3 Total asset retirement obligations $ 10 $ 10 The following table reconciles the beginning and ending balances of Sierra Pacific 's ARO liabilities for the years ended December 31 (in millions): 2019 2018 Beginning balance $ 10 $ 10 Accretion — — Ending balance $ 10 $ 10 Reflected as - Other long-term liabilities $ 10 $ 10 Certain of Sierra Pacific 's decommissioning and reclamation obligations relate to jointly-owned facilities, and as such, Sierra Pacific 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. Sierra Pacific 's estimated share of the decommissioning and reclamation obligations are primarily recorded as ARO liabilities in other long-term liabilities on the Balance Sheets.

Commitments and Contingencies (

Commitments and Contingencies (Notes)	12 Months Ended
	Dec. 31, 2019
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, 2019 are as follows (in millions): 2025 and 2020 2021 2022 2023 2024 Thereafter Total Contract type: Fuel, capacity and transmission contract commitments $ 2,218 $ 1,527 $ 1,193 $ 1,093 $ 1,088 $ 13,584 $ 20,703 Construction commitments 1,682 521 27 2 8 — 2,240 Easements 62 68 70 72 70 2,259 2,601 Maintenance, service and other contracts 669 342 324 300 255 1,624 3,514 $ 4,631 $ 2,458 $ 1,614 $ 1,467 $ 1,421 $ 17,467 $ 29,058 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, 2019 , 2018 and 2017 , $123 million , $111 million and $109 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 construction and repowering of wind-powered generating facilities in 2020 and 2021. • 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, t he Company has various non-cancelable maintenance, service and other contracts primarily related to turbine and equipment maintenance and various other service agreements. BHE Renewables' Counterparty Risk On January 29, 2019, PG&E Corporation and Pacific Gas and Electric Company (the "PG&E Utility") (together "PG&E") filed voluntary petitions for relief under chapter 11 of the United States Bankruptcy Code in the United States Bankruptcy Court for the Northern District of California ("PG&E Bankruptcy Filing"). The Company owns 100% of Topaz and owns a 49% interest in Agua Caliente. Topaz is a 550-MW solar photovoltaic electric power generating facility located in California. Topaz sells 100% of its energy, capacity and renewable energy credits generated from the facility to PG&E Utility under a 25-year wholesale power purchase agreement ("PPA") that is in effect until October 2039. As of December 31, 2019 , the Company's consolidated balance sheet includes $1.0 billion of property, plant and equipment, net and $0.9 billion of non-recourse project debt related to Topaz. Agua Caliente is a 290-MW solar photovoltaic electric power generating facility located in Arizona. Agua Caliente sells 100% of its energy, capacity and renewable energy credits generated from the facility to PG&E Utility under a 25-year wholesale PPA that is in effect until June 2039. As of December 31, 2019 , the Company's equity investment in Agua Caliente totals $73 million and the project has $0.8 billion of non-recourse project debt owed to the United States Department of Energy. The PG&E Bankruptcy Filing is an event of default under the Topaz PPA ("PPA Default"). PG&E paid in full the invoices for December 2018 deliveries and all amounts invoiced to date for post-petition energy deliveries for both Topaz and Agua Caliente. PG&E has not paid for the power delivered from January 1 through January 28, 2019. The Company continues to perform on its obligations and deliver renewable energy to the PG&E Utility, and PG&E has publicly stated it will pay suppliers in full under normal terms for post-petition goods and services received. The Company maintains that, in light of the current facts and circumstances, the PPA Default could not reasonably be expected to result in a material adverse effect under the Topaz indenture and, therefore, no default has occurred under the Topaz indenture. In July 2019, the California Governor signed AB 1054 into law. AB 1054 is comprehensive legislation addressing wildfire risk in the state of California that, among other items, authorizes a wildfire fund which would operate as an insurance fund to support the creditworthiness of electrical utilities, if certain utilities, including PG&E, participate by making the required contributions, among other things. In July 2019, PG&E notified the CPUC of its intent to participate in the insurance fund and such participation requires, among other items, PG&E to exit bankruptcy by June 30, 2020. The Company believes it is more likely than not that no impairment exists and current debt obligations will be met, as post-petition contractual revenue payments are expected to be paid by PG&E Utility to the Topaz and Agua Caliente projects. The Company will continue to monitor the situation, including continued receipt of future PG&E payments and the future risk of the PPAs being rejected or modified through the bankruptcy process. 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. 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 does not guarantee dam removal. Instead, it 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 main-stem Klamath dams from PacifiCorp to the KRRC. Over the past two years, the KRRC has been supplementing the application with additional information about its financial, technical, and legal capacity to become the licensee. In July 2019, the KRRC provided the FERC with additional information about its financial capacity to become a licensee, including updated cost estimates, and its insurance, bonding and liability transfer package. The FERC is evaluating the KRRC's information and the proposed license transfer. The KRRC will continue to refine its insurance, bonding and liability transfer package, and PacifiCorp will review the KRRC's capacity to fulfill its indemnity obligation under the KHSA. If certain conditions in the amended KHSA are not satisfied (e.g., inadequate funding or inability of KRRC to satisfy its indemnification obligation) and the license does not transfer to the KRRC, PacifiCorp will resume relicensing with the FERC. The United States Court of Appeals for the District of Columbia Circuit issued a decision in the Hoopa Valley Tribe v. FERC litigation, in January 2019, finding that the states of California and Oregon have waived their Clean Water Act, Section 401, water quality certification authority over the Klamath hydroelectric project relicensing. This decision has the potential to limit the ability of the States to impose water quality conditions on new and relicensed projects. Environmental interests, supported by California, Oregon and other states, asked the court to rehear the case, which was denied. Subsequently, environmental groups, supported by numerous states, filed a petition for certiorari before the United States Supreme Court, which was denied on December 9, 2019, thereby allowing the circuit court opinion to stand as a final and unappealable decision. As of December 31, 2019 , PacifiCorp's assets included $29 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. PacifiCorp estimates it is obligated to make capital expenditures of approximately $168 million over the next 10 years related to these licenses. Guarantees The Company has entered into guarantees as part of the normal course of business and the sale of certain assets. These guarantees are not expected to have a material impact on the Company's consolidated financial results.
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. 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 does not guarantee dam removal. Instead, it 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 main-stem Klamath dams from PacifiCorp to the KRRC. Over the past two years, the KRRC has been supplementing the application with additional information about its financial, technical, and legal capacity to become the licensee. In July 2019, the KRRC provided the FERC with additional information about its financial capacity to become a licensee, including updated cost estimates, and its insurance, bonding and liability transfer package. The FERC is evaluating the KRRC's information and the proposed license transfer. The KRRC will continue to refine its insurance, bonding and liability transfer package, and PacifiCorp will review the KRRC's capacity to fulfill its indemnity obligation under the KHSA. If certain conditions in the amended KHSA are not satisfied (e.g., inadequate funding or inability of KRRC to satisfy its indemnification obligation) and the license does not transfer to the KRRC, PacifiCorp will resume relicensing with the FERC. The United States Court of Appeals for the District of Columbia Circuit issued a decision in the Hoopa Valley Tribe v. FERC litigation, in January 2019, finding that the states of California and Oregon have waived their Clean Water Act, Section 401, water quality certification authority over the Klamath hydroelectric project relicensing. This decision has the potential to limit the ability of the States to impose water quality conditions on new and relicensed projects. Environmental interests, supported by California, Oregon and other states, asked the court to rehear the case, which was denied. Subsequently, environmental groups, supported by numerous states, filed a petition for certiorari before the United States Supreme Court, which was denied on December 9, 2019, thereby allowing the circuit court opinion to stand as a final and unappealable decision. As of December 31, 2019 , PacifiCorp's assets included $29 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. PacifiCorp estimates it is obligated to make capital expenditures of approximately $168 million over the next 10 years related to these licenses. Commitments PacifiCorp has the following firm commitments that are not reflected on the Consolidated Balance Sheet. Minimum payments as of December 31, 2019 are as follows (in millions): 2020 2021 2022 2023 2024 2025 and Thereafter Total Contract type: Purchased electricity contracts - commercially operable $ 279 $ 177 $ 174 $ 168 $ 164 $ 1,810 $ 2,772 Purchased electricity contracts - non-commercially operable 7 52 52 53 53 987 1,204 Fuel contracts 832 519 316 245 248 775 2,935 Construction commitments 844 6 — — 4 — 854 Transmission 101 86 77 71 56 429 820 Easements 10 12 12 12 11 349 406 Maintenance, service and other contracts 329 49 41 34 32 204 689 Total commitments $ 2,402 $ 901 $ 672 $ 583 $ 568 $ 4,554 $ 9,680 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 power purchase agreements 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. Refer to Note 5 for information on 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 2019 , 2018 and 2017 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 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 and Contingencies Commitments MidAmerican Energy had the following firm commitments that are not reflected on the Balance Sheet. Minimum payments as of December 31, 2019 , are as follows (in millions): 2025 and 2020 2021 2022 2023 2024 Thereafter Total Contract type: Coal and natural gas for generation $ 114 $ 52 $ 48 $ 39 $ — $ — $ 253 Electric capacity and transmission 28 24 14 8 7 29 110 Natural gas contracts for gas operations 102 61 47 24 8 23 265 Construction commitments 670 515 27 2 4 — 1,218 Easements 32 36 37 38 39 1,492 1,674 Maintenance, services and other 198 156 154 155 120 432 1,215 $ 1,144 $ 844 $ 327 $ 266 $ 178 $ 1,976 $ 4,735 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 2037 . MidAmerican Energy has contracts to purchase electric capacity that have minimum payment commitments ranging through 2028 . 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 2020 and 2021 firm construction commitments reflected in the table above consist primarily of contracts for the construction and repowering of wind-powered generating facilities and the settlement of asset retirement obligations. 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 2029 . 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 base ROE effective January 2015. Prior to September 2016, the rates in effect were based on a 12.38% return on equity ("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 reduced 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. The order indicated no refunds were necessary for the period February 2015 through September 2016. The order has been appealed, and MidAmerican Energy has accrued a $16 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 [Domain]
Contractual Obligation [Line Items]
Commitments and Contingencies	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 M Ws 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 , 2019 are as follows (in millions): 2020 2021 2022 2023 2024 2025 and Thereafter Total Contract type: Fuel, capacity and transmission contract commitments $ 539 $ 390 $ 319 $ 321 $ 324 $ 3,432 $ 5,325 Fuel and capacity contract commitments (not commercially operable) 1 6 41 92 157 4,677 4,974 Construction commitments 23 — — — — — 23 Easements 4 4 5 5 3 43 64 Maintenance, service and other contracts 51 48 43 34 25 18 219 Total commitments $ 618 $ 448 $ 408 $ 452 $ 509 $ 8,170 $ 10,605 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 2020 to 2021 . 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 certain generating plant projects. Easements Nevada Power has non-cancelable easements for land. Operations and maintenance expense on non-cancelable easements totaled $7 million , $4 million and $4 million for the years ended December 31 , 2019 , 2018 and 2017 , 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 2020 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 , 2019 are as follows (in millions): 2025 and 2020 2021 2022 2023 2024 Thereafter Total Contract type: Fuel, capacity and transmission contract commitments $ 260 $ 198 $ 114 $ 84 $ 83 $ 863 $ 1,602 Fuel and capacity contract commitments (not commercially operable) 1 11 41 41 42 921 1,057 Easements 2 2 2 2 2 30 40 Maintenance, service and other contracts 11 8 7 2 1 9 38 Total commitments $ 274 $ 219 $ 164 $ 129 $ 128 $ 1,823 $ 2,737 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 2020 to 2044 . 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 2020 to 2046 and the gas supply contracts expire from 2020 to 2021 . 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 , 2019 , 2018 and 2017 . 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 2020 to 2039 .

Preferred Stock (Notes)

Preferred Stock (Notes)	12 Months Ended
	Dec. 31, 2019
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, 2019 and 2018 . 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, 2019 and 2018 .

BHE Shareholders' Equity (Notes

BHE Shareholders' Equity (Notes)	12 Months Ended
	Dec. 31, 2019
Stockholders' Equity Note [Abstract]
BHE Shareholders' Equity [Text Block]	BHE Shareholders' Equity 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 . For the year ended December 31, 2017, BHE issued $100 million of its 5.00% junior subordinated debentures due June 2057 in exchange for 181,819 shares of its common stock. 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 $18.1 billion as of December 31, 2019 . 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 $17.5 billion as of December 31, 2019 .

Common Shareholder's Equity Com

Common Shareholder's Equity Common Shareholder's Equity (Notes)	12 Months Ended
	Dec. 31, 2019
Class of Stock [Line Items]
Common Shareholder's Equity [Text Block]	BHE Shareholders' Equity 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 . For the year ended December 31, 2017, BHE issued $100 million of its 5.00% junior subordinated debentures due June 2057 in exchange for 181,819 shares of its common stock. 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 $18.1 billion as of December 31, 2019 . 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 $17.5 billion as of December 31, 2019 .
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, 2019 , 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, 2019 , PacifiCorp's actual common equity percentage, as calculated under this measure, was 53% , and PacifiCorp would have been permitted to dividend $2.4 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, 2019 , 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, 2019
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, 2016 $ (447 ) $ (1,675 ) $ 585 $ 26 $ (1,511 ) Other comprehensive income (loss) 64 546 500 3 1,113 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 ) Reclassifications from AOCI to net income for the years ended December 31, 2019 , 2018 and 2017 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 $16 million and $13 million as of December 31, 2019 and 2018 , respectively.

Variable-Interest Entities Vari

Variable-Interest Entities Variable-Interest Entities (Notes)	12 Months Ended
	Dec. 31, 2019
PacifiCorp [Member]
Schedule of Equity Method Investments [Line Items]
Variable Interest Entity Disclosure [Text Block]	Variable-Interest Entities PacifiCorp holds a two-thirds interest in Bridger Coal Company ("Bridger Coal"), which supplies coal to the Jim Bridger generating facility that is owned two-thirds by PacifiCorp and one-third by PacifiCorp's joint venture partner in Bridger Coal. PacifiCorp purchases two-thirds of the coal produced by Bridger Coal, while the remaining coal 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 $81 million and $100 million as of December 31, 2019 and 2018 , respectively. Refer to Note 21 for information regarding related-party transactions with Bridger Coal.

Noncontrolling Interests (Notes

Noncontrolling Interests (Notes)	12 Months Ended
	Dec. 31, 2019
Noncontrolling Interest [Line Items]
Noncontrolling Interests [Text Block]	Noncontrolling Interests Included in noncontrolling interests on the Consolidated Balance Sheets are preferred securities of subsidiaries of $58 million as of December 31, 2019 and 2018 , 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 [Domain]
Noncontrolling Interest [Line Items]
Other, Net [Text Block]	Other Income (Expense) - Other, Net 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): 2019 2018 2017 Non-service cost components of postretirement employee benefit plans $ 17 $ 21 $ 18 Corporate-owned life insurance income 24 6 13 Loss on debt tender offer — — (29 ) Interest income and other, net 11 4 7 Total $ 52 $ 31 $ 9 Refer to Note 8 for information regarding the debt tender offer.

Segment Information (Notes)

Segment Information (Notes)	12 Months Ended
	Dec. 31, 2019
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, 2019 2018 2017 Operating revenue: PacifiCorp $ 5,068 $ 5,026 $ 5,237 MidAmerican Funding 2,927 3,053 2,846 NV Energy 3,037 3,039 3,015 Northern Powergrid 1,013 1,020 949 BHE Pipeline Group 1,131 1,203 993 BHE Transmission 707 710 699 BHE Renewables 932 908 838 HomeServices 4,473 4,214 3,443 BHE and Other (1) 556 614 594 Total operating revenue $ 19,844 $ 19,787 $ 18,614 Depreciation and amortization: PacifiCorp $ 954 $ 979 $ 796 MidAmerican Funding 638 609 500 NV Energy 482 456 422 Northern Powergrid 254 250 214 BHE Pipeline Group 115 126 159 BHE Transmission 240 247 239 BHE Renewables 282 268 251 HomeServices 47 51 66 BHE and Other (1) (1 ) (2 ) (1 ) Total depreciation and amortization $ 3,011 $ 2,984 $ 2,646 Operating income: PacifiCorp $ 1,072 $ 1,051 $ 1,440 MidAmerican Funding 549 550 544 NV Energy 655 607 766 Northern Powergrid 472 486 488 BHE Pipeline Group 572 525 473 BHE Transmission 323 313 322 BHE Renewables 336 325 316 HomeServices 222 214 214 BHE and Other (1) (51 ) 1 (41 ) Total operating income 4,150 4,072 4,522 Interest expense (1,912 ) (1,838 ) (1,841 ) Capitalized interest 77 61 45 Allowance for equity funds 173 104 76 Interest and dividend income 117 113 111 (Losses) gains on marketable securities, net (288 ) (538 ) 14 Other, net 97 (9 ) (420 ) Total income before income tax (benefit) expense and equity income (loss) $ 2,414 $ 1,965 $ 2,507 Years Ended December 31, 2019 2018 2017 Interest expense: PacifiCorp $ 401 $ 384 $ 381 MidAmerican Funding 302 247 237 NV Energy 229 224 233 Northern Powergrid 139 141 133 BHE Pipeline Group 52 43 43 BHE Transmission 157 167 169 BHE Renewables 174 201 204 HomeServices 25 23 7 BHE and Other (1) 433 408 434 Total interest expense $ 1,912 $ 1,838 $ 1,841 Income tax (benefit) expense: PacifiCorp $ 61 $ 5 $ 362 MidAmerican Funding (377 ) (262 ) (202 ) NV Energy 98 100 221 Northern Powergrid 59 61 57 BHE Pipeline Group 138 119 170 BHE Transmission 11 7 (124 ) BHE Renewables (2) (325 ) (158 ) (795 ) HomeServices 51 52 49 BHE and Other (1) (314 ) (507 ) (292 ) Total income tax (benefit) expense $ (598 ) $ (583 ) $ (554 ) Capital expenditures: PacifiCorp $ 2,175 $ 1,257 $ 769 MidAmerican Funding 2,810 2,332 1,776 NV Energy 657 503 456 Northern Powergrid 602 566 579 BHE Pipeline Group 687 427 286 BHE Transmission 247 270 334 BHE Renewables 122 817 323 HomeServices 54 47 37 BHE and Other 10 22 11 Total capital expenditures $ 7,364 $ 6,241 $ 4,571 As of December 31, 2019 2018 2017 Property, plant and equipment, net: PacifiCorp $ 20,973 $ 19,570 $ 19,183 MidAmerican Funding 18,377 16,169 14,221 NV Energy 9,613 9,367 9,276 Northern Powergrid 6,606 6,007 6,075 BHE Pipeline Group 5,482 4,904 4,587 BHE Transmission 6,157 5,824 6,330 BHE Renewables 5,976 6,155 5,637 HomeServices 161 141 117 BHE and Other (40 ) (50 ) (69 ) Total property, plant and equipment, net $ 73,305 $ 68,087 $ 65,357 Total assets: PacifiCorp $ 24,861 $ 23,478 $ 23,086 MidAmerican Funding 22,664 20,029 18,444 NV Energy 14,128 14,119 13,903 Northern Powergrid 8,385 7,427 7,565 BHE Pipeline Group 6,100 5,511 5,134 BHE Transmission 8,776 8,424 9,009 BHE Renewables 9,961 8,666 7,687 HomeServices 3,846 2,797 2,722 BHE and Other 1,330 1,738 2,658 Total assets $ 100,051 $ 92,189 $ 90,208 Years Ended December 31, 2019 2018 2017 Operating revenue by country: United States $ 18,108 $ 18,014 $ 16,916 United Kingdom 1,011 1,017 948 Canada 706 710 699 Philippines and other 19 46 51 Total operating revenue by country $ 19,844 $ 19,787 $ 18,614 Income before income tax (benefit) expense and equity income (loss) by country: United States $ 1,866 $ 1,425 $ 1,927 United Kingdom 326 307 313 Canada 178 155 167 Philippines and other 44 78 100 Total income before income tax (benefit) expense and equity (loss) income by country: $ 2,414 $ 1,965 $ 2,507 As of December 31, 2019 2018 2017 Property, plant and equipment, net by country: United States $ 60,634 $ 56,362 $ 53,065 United Kingdom 6,504 5,895 5,953 Canada 6,157 5,817 6,323 Philippines and other 10 13 16 Total property, plant and equipment, net by country $ 73,305 $ 68,087 $ 65,357 (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 (benefit) expense 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, 2019 and 2018 (in millions): BHE BHE MidAmerican NV Northern Pipeline BHE BHE Home- and PacifiCorp Funding Energy Powergrid Group Transmission Renewables Services Other Total December 31, 2017 $ 1,129 $ 2,102 $ 2,369 $ 991 $ 73 $ 1,571 $ 95 $ 1,348 $ — $ 9,678 Acquisitions — — — — — — — 79 — 79 Foreign currency translation — — — (39 ) — (123 ) — — — (162 ) 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
MidAmerican Energy Company [Member]
Segment Reporting Information [Line Items]
Segment Information [Text Block]	Segment Information 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 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, 2019 2018 2017 Operating revenue: Regulated electric $ 2,237 $ 2,283 $ 2,108 Regulated natural gas 660 754 719 Other 28 12 10 Total operating revenue $ 2,925 $ 3,049 $ 2,837 Depreciation and amortization: Regulated electric $ 593 $ 565 $ 458 Regulated natural gas 46 44 42 Total depreciation and amortization $ 639 $ 609 $ 500 Operating income: Regulated electric $ 473 $ 469 $ 472 Regulated natural gas 71 81 72 Other 4 1 (1 ) Total operating income $ 548 $ 551 $ 543 Interest expense: Regulated electric $ 259 $ 208 $ 196 Regulated natural gas 22 19 18 Total interest expense $ 281 $ 227 $ 214 Years Ended December 31, 2019 2018 2017 Income tax (benefit) expense: Regulated electric $ (384 ) $ (273 ) $ (212 ) Regulated natural gas 12 16 29 Other 1 2 — Total income tax (benefit) expense $ (371 ) $ (255 ) $ (183 ) Net income: Regulated electric $ 739 $ 628 $ 570 Regulated natural gas 52 54 35 Other 2 — — Net income $ 793 $ 682 $ 605 Capital expenditures: Regulated electric $ 2,684 $ 2,223 $ 1,686 Regulated natural gas 126 109 87 Total capital expenditures $ 2,810 $ 2,332 $ 1,773 As of December 31, 2019 2018 2017 Total assets: Regulated electric $ 19,093 $ 16,511 $ 14,914 Regulated natural gas 1,468 1,406 1,403 Other 3 3 1 Total assets $ 20,564 $ 17,920 $ 16,318
MidAmerican Funding, LLC and Subsidiaries [Domain]
Segment Reporting Information [Line Items]
Segment Information [Text Block]	Segment Information 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 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, 2019 2018 2017 Operating revenue: Regulated electric $ 2,237 $ 2,283 $ 2,108 Regulated natural gas 660 754 719 Other 30 16 19 Total operating revenue $ 2,927 $ 3,053 $ 2,846 Depreciation and amortization: Regulated electric $ 593 $ 565 $ 458 Regulated natural gas 46 44 42 Total depreciation and amortization $ 639 $ 609 $ 500 Operating income: Regulated electric $ 473 $ 469 $ 472 Regulated natural gas 71 81 72 Other 5 — — Total operating income $ 549 $ 550 $ 544 Interest expense: Regulated electric $ 259 $ 208 $ 196 Regulated natural gas 22 19 18 Other 21 20 23 Total interest expense $ 302 $ 247 $ 237 Income tax (benefit) expense: Regulated electric $ (384 ) $ (273 ) $ (212 ) Regulated natural gas 12 16 29 Other (5 ) (5 ) (19 ) Total income tax (benefit) expense $ (377 ) $ (262 ) $ (202 ) Net income: Regulated electric $ 739 $ 628 $ 570 Regulated natural gas 52 54 35 Other (10 ) (13 ) (31 ) Net income $ 781 $ 669 $ 574 Years Ended December 31, 2019 2018 2017 Capital expenditures: Regulated electric $ 2,684 $ 2,223 $ 1,686 Regulated natural gas 126 109 87 Total capital expenditures $ 2,810 $ 2,332 $ 1,773 As of December 31, 2019 2018 2017 Total assets: Regulated electric $ 20,284 $ 17,702 $ 16,105 Regulated natural gas 1,547 1,485 1,482 Other 9 15 34 Total assets $ 21,840 $ 19,202 $ 17,621 Goodwill by reportable segment as of December 31, 2019 and 2018 , 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, 2019 2018 2017 Operating revenue: Regulated electric $ 770 $ 752 $ 713 Regulated natural gas 119 103 99 Total operating revenue $ 889 $ 855 $ 812 Operating income: Regulated electric $ 150 $ 136 $ 175 Regulated natural gas 21 16 22 Total operating income 171 152 197 Interest expense (48 ) (44 ) (43 ) Allowance for borrowed funds 1 1 2 Allowance for equity funds 3 4 3 Other, net 4 9 5 Income before income tax expense $ 131 $ 122 $ 164 As of December 31, 2019 2018 2017 Assets Regulated electric $ 3,319 $ 3,177 $ 3,103 Regulated natural gas 308 314 300 Regulated common assets (1) 44 78 10 Total assets $ 3,671 $ 3,569 $ 3,413 (1) Consists principally of cash and cash equivalents not included in either the regulated electric or regulated natural gas segments.

Unaudited Quarterly Operating R

Unaudited Quarterly Operating Results Unaudited Quarterly Operating Results (Notes)	12 Months Ended
	Dec. 31, 2019
Nevada Power Company [Member]
Quarterly Operating Results [Line Items]
Quarterly Financial Information [Text Block]	Unaudited Quarterly Operating Results (in millions) Three-Month Periods Ended March 31, June 30, September 30, December 31, 2019 2019 2019 2019 Operating revenues $ 395 $ 527 $ 806 $ 420 Operating income 45 123 244 67 Net income 6 69 165 24 Three-Month Periods Ended March 31, June 30, September 30, December 31, 2018 2018 2018 2018 Operating revenues $ 395 $ 562 $ 820 $ 407 Operating income 40 122 247 37 Net income — 64 164 (2 )
Sierra Pacific Power Company [Member]
Quarterly Operating Results [Line Items]
Quarterly Financial Information [Text Block]	Unaudited Quarterly Operating Results (in millions) Three-Month Periods Ended March 31, June 30, September 30, December 31, 2019 2019 2019 2019 Regulated electric operating revenue $ 182 $ 172 $ 232 $ 184 Regulated natural gas operating revenue 37 22 16 44 Operating income 37 27 67 40 Net income 22 14 44 23 Three-Month Periods Ended March 31, June 30, September 30, December 31, 2018 2018 2018 2018 Regulated electric operating revenue $ 181 $ 169 $ 225 $ 177 Regulated natural gas operating revenue 41 19 14 29 Operating income 47 19 56 30 Net income 34 7 35 16

Condensed Financial Statements

Condensed Financial Statements (Notes)	12 Months Ended
	Dec. 31, 2019
Condensed Financial Statements, Captions [Line Items]
Condensed Financial Statements [Text Block]	Schedule I As of December 31, 2019 2018 ASSETS Current assets: Cash and cash equivalents $ 13 $ 9 Accounts receivable - affiliate 87 100 Notes receivable - affiliate 181 156 Income tax receivable 3 103 Other current assets 8 15 Total current assets 292 383 Investments in subsidiaries 40,204 36,602 Other investments 1,300 1,579 Goodwill 1,221 1,221 Other assets 695 546 Total assets $ 43,712 $ 40,331 LIABILITIES AND EQUITY Current liabilities: Accounts payable and other current liabilities $ 194 $ 183 Notes payable - affiliate 240 328 Short-term debt 1,590 983 Current portion of BHE senior debt 350 — Total current liabilities 2,374 1,494 BHE senior debt 8,231 8,577 BHE junior subordinated debentures 100 100 Notes payable - affiliate 2 1 Other long-term liabilities 530 543 Total liabilities 11,237 10,715 Equity: BHE shareholders' equity: Common stock - 115 shares authorized, no par value, 77 shares issued and outstanding — — Additional paid-in capital 6,389 6,371 Long-term income tax receivable (530 ) (457 ) Retained earnings 28,296 25,624 Accumulated other comprehensive loss, net (1,706 ) (1,945 ) Total BHE shareholders' equity 32,449 29,593 Noncontrolling interest 26 23 Total equity 32,475 29,616 Total liabilities and equity $ 43,712 $ 40,331 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, 2019 2018 2017 Operating expenses: General and administration $ 49 $ 21 $ 55 Depreciation and amortization 5 4 4 Total operating expenses 54 25 59 Operating loss (54 ) (25 ) (59 ) Other income (expense): Interest expense (452 ) (438 ) (475 ) Other, net (271 ) (537 ) (369 ) Total other income (expense) (723 ) (975 ) (844 ) Loss before income tax benefit and equity income (777 ) (1,000 ) (903 ) Income tax benefit (312 ) (513 ) (335 ) Equity income 3,419 3,058 3,441 Net income 2,954 2,571 2,873 Net income attributable to noncontrolling interest 3 3 3 Net income attributable to BHE shareholders $ 2,951 $ 2,568 $ 2,870 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, 2019 2018 2017 Net income $ 2,954 $ 2,571 $ 2,873 Other comprehensive income (loss), net of tax 239 (462 ) 1,113 Comprehensive income 3,193 2,109 3,986 Comprehensive income attributable to noncontrolling interests 3 3 3 Comprehensive income attributable to BHE shareholders $ 3,190 $ 2,106 $ 3,983 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, 2019 2018 2017 Cash flows from operating activities $ 1,780 $ 1,885 $ 2,450 Cash flows from investing activities: Investments in subsidiaries (1,972 ) (1,791 ) (1,566 ) Purchases of investments (42 ) (44 ) (71 ) Proceeds from sale of investments 42 45 68 Notes receivable from affiliate, net (112 ) (72 ) (305 ) Other, net (5 ) (22 ) (8 ) Net cash flows from investing activities (2,089 ) (1,884 ) (1,882 ) Cash flows from financing activities: Proceeds from BHE senior debt — 3,166 — Repayments of BHE senior debt — (1,045 ) (1,379 ) Repayments of BHE subordinated debt — — (944 ) Common stock purchases (293 ) (107 ) (19 ) Net proceeds from (repayments of) short-term debt 607 (2,348 ) 2,498 Tender offer premium paid — — (406 ) Other, net (1 ) (4 ) (5 ) Net cash flows from financing activities 313 (338 ) (255 ) Net change in cash and cash equivalents 4 (337 ) 313 Cash and cash equivalents at beginning of year 9 346 33 Cash and cash equivalents at end of year $ 13 $ 9 $ 346 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, 2019 and 2018 , the fair value of BHE 's investment in BYD common stock was $1,122 million and $1,435 million Dividends and distributions from subsidiaries - Cash dividends paid to BHE by its subsidiaries for the years ended December 31, 2019 , 2018 and 2017 were $2.0 billion , $2.3 billion and $3.0 billion , respectively. In January 2020 , BHE received cash dividends from its subsidiaries totaling $118 million . Guarantees and commitments - BHE has issued guarantees and letters of credit in respect of subsidiary and equity method investments aggregating $277 million and commitments, subject to satisfaction of certain specified conditions, to provide equity contributions in support of renewable tax equity investments totaling $2.4 billion . 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, 2019 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, 2019 , 2018 and 2017 . 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 $130 million in 2019 and 2017 , 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, 2019
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, 2019 (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 2019 $ 42 $ 47 $ — $ (45 ) $ 44 Year ended 2018 40 43 — (41 ) 42 Year ended 2017 33 42 — (35 ) 40 Reserves Not Deducted From Assets (1) : Year ended 2019 $ 13 $ 4 $ — $ (5 ) $ 12 Year ended 2018 13 6 — (6 ) 13 Year ended 2017 13 7 — (7 ) 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 [Domain]
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Consolidated Valuation and Qualifying Accounts [Text Block]	MIDAMERICAN FUNDING, LLC AND SUBSIDIARIES MHC INC. AND SUBSIDIARIES CONSOLIDATED VALUATION AND QUALIFYING ACCOUNTS FOR THE THREE YEARS ENDED DECEMBER 31, 2019 (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 2019 $ 7 $ 9 $ (11 ) $ 5 Year ended 2018 $ 7 $ 8 $ (8 ) $ 7 Year ended 2017 $ 7 $ 8 $ (8 ) $ 7 Reserves Not Deducted From Assets (1) : Year ended 2019 $ 13 $ 4 $ (5 ) $ 12 Year ended 2018 $ 13 $ 6 $ (6 ) $ 13 Year ended 2017 $ 13 $ 7 $ (7 ) $ 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, 2019 (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 2019 $ 7 $ 9 $ (11 ) $ 5 Year ended 2018 $ 7 $ 8 $ (8 ) $ 7 Year ended 2017 $ 7 $ 8 $ (8 ) $ 7 Reserves Not Deducted From Assets (1) : Year ended 2019 $ 13 $ 4 $ (5 ) $ 12 Year ended 2018 $ 13 $ 6 $ (6 ) $ 13 Year ended 2017 $ 13 $ 7 $ (7 ) $ 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 Revenue from Contract with Customer (Notes)	12 Months Ended
	Dec. 31, 2019
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer [Text Block]	Revenue from Contracts with Customers 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 following table summarizes the Company's energy products and services revenue by regulated energy and nonregulated energy, with further disaggregation of regulated energy by customer class and 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, 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 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, 2019 2018 Customer Revenue: Brokerage $ 4,028 $ 3,882 Franchise 68 67 Total Customer Revenue 4,096 3,949 Other revenue 377 265 Total $ 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, 2019 , by reportable segment (in millions): Performance obligations expected to be satisfied Less than 12 months More than 12 months Total BHE Pipeline Group $ 871 $ 5,136 $ 6,007
MidAmerican Energy Company [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer [Text Block]	Revenue from Contracts with Customers MidAmerican Energy uses a single five-step model to identify and recognizes 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, 2019 2018 Electric Natural Gas Other Total Electric Natural Gas Other Total Customer Revenue: Retail: Residential $ 672 $ 383 $ — $ 1,055 $ 696 $ 421 $ — $ 1,117 Commercial 322 132 — 454 314 153 — 467 Industrial 799 17 — 816 758 22 — 780 Natural gas transportation services — 38 — 38 — 39 — 39 Other retail 145 — — 145 147 1 — 148 Total retail 1,938 570 — 2,508 1,915 636 — 2,551 Wholesale 221 88 — 309 295 116 — 411 Multi-value transmission projects 57 — — 57 55 — — 55 Other Customer Revenue — — 28 28 — — 11 11 Total Customer Revenue 2,216 658 28 2,902 2,265 752 11 3,028 Other revenue 21 2 — 23 18 2 1 21 Total operating revenue $ 2,237 $ 660 $ 28 $ 2,925 $ 2,283 $ 754 $ 12 $ 3,049
MidAmerican Funding, LLC and Subsidiaries [Domain]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer [Text Block]	Revenue from Contracts with Customers Refer to Note 14 of MidAmerican Energy's Notes to Financial Statements. Additionally, MidAmerican Funding had $2 million and $4 million of other revenue from contracts with customers for the year ended December 31, 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): 2019 2018 Customer Revenue: Retail: Residential $ 1,783 $ 1,737 Commercial 1,522 1,513 Industrial 1,176 1,172 Other retail 230 234 Total retail 4,711 4,656 Wholesale 99 55 Transmission 98 103 Other Customer Revenue 78 76 Total Customer Revenue 4,986 4,890 Other revenue 82 136 Total operating revenue $ 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 by customer class for the years ended December 31 (in millions): 2019 2018 Customer Revenue: Retail: Residential $ 1,141 $ 1,195 Commercial 441 433 Industrial 433 425 Other 20 24 Total fully bundled 2,035 2,077 Distribution only service 31 30 Total retail 2,066 2,107 Wholesale, transmission and other 57 53 Total Customer Revenue 2,123 2,160 Other revenue 25 24 Total revenue $ 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 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): 2019 2018 Electric Natural Gas Total Electric Natural Gas Total Customer Revenue: Retail: Residential $ 268 $ 76 $ 344 $ 267 $ 67 $ 334 Commercial 245 30 275 246 25 271 Industrial 186 10 196 177 8 185 Other 6 1 7 6 1 7 Total fully bundled 705 117 822 696 101 797 Distribution only service 4 — 4 4 — 4 Total retail 709 117 826 700 101 801 Wholesale, transmission and other 57 — 57 48 — 48 Total Customer Revenue 766 117 883 748 101 849 Other revenue 4 2 6 4 2 6 Total revenue $ 770 $ 119 $ 889 $ 752 $ 103 $ 855

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2019
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 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. 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, 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 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 Doubtful Accounts Trade receivables are stated at the outstanding principal amount, net of an estimated allowance for doubtful accounts. The allowance for doubtful accounts 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. As of December 31, 2019 and 2018 , the allowance for doubtful accounts totaled $44 million and $42 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. 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 [Policy Text Block]	Inventories Inventories consist mainly of fuel, which includes coal stocks, stored gas and fuel oil, totaling $257 million and $273 million as of December 31, 2019 and 2018 , respectively, and materials and supplies totaling $616 million and $571 million as of December 31, 2019 and 2018 , 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 $2 million and $14 million higher as of December 31, 2019 and 2018 , 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 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.
Property, plant and equipment, net - impairment [Policy Text Block]	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.
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 the reporting unit. 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. 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; 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 2019 , 2018 and 2017 , 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 [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, 2019 and 2018 , trade receivables, net on the Consolidated Balance Sheets relate substantially to Customer Revenue, including unbilled revenue of $638 million and $554 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 Accounting Standards Codification ("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 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 and acquisition 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. Deferred income tax assets and liabilities are based on differences between the financial statement and income tax basis of assets and liabilities using estimated 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 in most state and provincial 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. 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.
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.
New Accounting Pronouncements, Policy [Policy Text Block]	New Accounting Pronouncements In February 2016, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") No. 2016-02, which creates FASB Accounting Standards Codification ("ASC") Topic 842, "Leases" and supersedes Topic 840 "Leases." This guidance increases transparency and comparability among entities by recording lease assets and lease liabilities on the balance sheet and disclosing key information about leasing arrangements. A lessee should recognize on the balance sheet a liability to make lease payments (the lease liability) and a right-of-use asset representing its right to use the underlying asset for the lease term. The recognition, measurement and presentation of expenses and cash flows arising from a lease by a lessee have not significantly changed from previous guidance. Following the issuance of ASU No. 2016-02, the FASB issued several ASUs that clarified the implementation guidance for ASU No. 2016-02 but did not change the core principle of the guidance. The Company has elected to utilize various practical expedients available to adopt ASU No. 2016-02, including (1) the package of three not requiring a reassessment of (i) whether any expired or existing contracts are or contain leases; (ii) the lease classification for any expired or existing leases; and (iii) initial direct costs for any existing leases; (2) using hindsight in determining the lease term; and (3) not requiring a reassessment of whether existing or expired land easements that were not previously accounted for as leases under ASC Topic 840 are or contain a lease under ASC Topic 842. The Company adopted this guidance for all applicable contracts in-effect as of January 1, 2019 under a modified retrospective method and the adoption did not have a cumulative effect impact at the date of initial adoption.
PacifiCorp [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 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 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 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 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 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.
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.
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, 2019 and 2018 , 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 Doubtful Accounts Accounts receivable are stated at the outstanding principal amount, net of an estimated allowance for doubtful accounts. The allowance for doubtful accounts 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. As of December 31, 2019 and 2018 , the allowance for doubtful accounts totaled $8 million and is included in trade receivables, net on the Consolidated Balance Sheets.
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]	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 [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 represent 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]	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.
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." 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 , 2019 and 2018 , trade receivables, net on the Consolidated Balance Sheets relate substantially to Customer Revenue, including unbilled revenue of $245 million and $229 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 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.
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 lease obligations and corresponding right-of-use assets 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 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.
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 estimated 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 $11 million and $13 million as of December 31, 2019 and 2018 , respectively.
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.
Segment reporting	Segment Information PacifiCorp currently has one segment, which includes its regulated electric utility operations.
New Accounting Pronouncements, Policy [Policy Text Block]	New Accounting Pronouncements In February 2016, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") No. 2016-02, which creates FASB Accounting Standards Codification ("ASC") Topic 842, "Leases" and supersedes Topic 840 "Leases." This guidance increases transparency and comparability among entities by recording lease assets and lease liabilities on the balance sheet and disclosing key information about leasing arrangements. A lessee should recognize on the balance sheet a liability to make lease payments (the lease liability) and a right-of-use asset representing its right to use the underlying asset for the lease term. The recognition, measurement and presentation of expenses and cash flows arising from a lease by a lessee have not significantly changed from previous guidance. Following the issuance of ASU No. 2016-02, the FASB issued several ASUs that clarified the implementation guidance for ASU No. 2016-02 but did not change the core principle of the guidance. PacifiCorp has elected to utilize various practical expedients available to adopt ASU No. 2016-02, including (1) the package of three not requiring a reassessment of (i) whether any expired or existing contracts are or contain leases; (ii) the lease classification for any expired or existing leases; and (iii) initial direct costs for any existing leases; (2) using hindsight in determining the lease term; and (3) not requiring a reassessment of whether existing or expired land easements that were not previously accounted for as leases under ASC Topic 840 are or contain a lease under ASC Topic 842. PacifiCorp adopted this guidance for all applicable contracts in effect as of January 1, 2019 under a modified retrospective method and the adoption did not have a cumulative effect impact at the date of initial adoption.
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, 2019 , 2018 and 2017 .
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.
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 restricted for the purpose of constructing solid waste facilities under tax exempt bond agreements. Restricted amounts are included in other current assets and investments and restricted investments on the Balance Sheets.
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 Doubtful Accounts Receivables are stated at the outstanding principal amount, net of an estimated allowance for doubtful accounts. The allowance for doubtful accounts 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. As of December 31, 2019 and 2018 , the allowance for doubtful accounts totaled $5 million and $7 million , respectively, and is included in 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. 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 [Policy Text Block]	Inventories Inventories consist mainly of coal stocks, totaling $66 million and $51 million as of December 31, 2019 and 2018 , respectively, materials and supplies, totaling $128 million and $124 million as of December 31, 2019 and 2018 , respectively, and natural gas in storage, totaling $28 million and $24 million as of December 31, 2019 and 2018 , 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 $2 million lower and $14 million higher as of December 31, 2019 and 2018 , 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 this arrangement 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, 2019 and 2018 , unbilled revenue was $91 million and $88 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 receivables at December 31, 2019 and 2018 , was $56 million .
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 estimated 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.
New Accounting Pronouncements, Policy [Policy Text Block]	New Accounting Pronouncements In February 2016, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") No. 2016-02, which creates FASB Accounting Standards Codification ("ASC") Topic 842, "Leases" and supersedes Topic 840 "Leases." This guidance increases transparency and comparability among entities by recording lease assets and lease liabilities on the balance sheet and disclosing key information about leasing arrangements. A lessee should recognize on the balance sheet a liability to make lease payments (the lease liability) and a right-of-use asset representing its right to use the underlying asset for the lease term. The recognition, measurement and presentation of expenses and cash flows arising from a lease by a lessee have not significantly changed from previous guidance. Following the issuance of ASU No. 2016-02, the FASB issued several ASUs that clarified the implementation guidance for ASU No. 2016-02 but did not change the core principle of the guidance. MidAmerican Energy has elected to utilize various practical expedients available to adopt ASU No. 2016-02, including (1) the package of three not requiring a reassessment of (i) whether any expired or existing contracts are or contain leases; (ii) the lease classification for any expired or existing leases; and (iii) initial direct costs for any existing leases; (2) using hindsight in determining the lease term; and (3) not requiring a reassessment of whether existing or expired land easements that were not previously accounted for as leases under ASC Topic 840 are or contain a lease under ASC Topic 842. MidAmerican Energy adopted this guidance for all applicable contracts in effect as of January 1, 2019 under a modified retrospective method, and the adoption did not have a cumulative effect impact at the date of initial adoption nor a material impact on MidAmerican Energy's Financial Statements and disclosures included within Notes to Financial Statements.
MidAmerican Funding, LLC and Subsidiaries [Domain]
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, 2019 , 2018 and 2017 .
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 the reporting unit. 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 2019 , 2018 and 2017 , 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, 2019 , 2018 and 2017 .
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).
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.
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.
Allowance for doubtful accounts [Policy Text Block]	Allowance for Doubtful Accounts Accounts receivable are stated at the outstanding principal amount, net of an estimated allowance for doubtful accounts. The allowance for doubtful accounts 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. Nevada Power also has the ability to assess deposits on customers who have delayed payments or who are deemed to be a credit risk. As of December 31, 2019 and 2018 , the allowance for doubtful accounts totaled $15 million and $16 million , respectively, and is included in trade receivables, net on the Consolidated Balance Sheets.
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 $62 million and $56 million as of December 31 , 2019 and 2018 , and fuel, which includes coal stock, stored natural gas and fuel oil, totaling $- million and $5 million as of December 31 , 2019 and 2018 , 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. 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 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 2019 and 2018 was 7.83% and 7.95% , respectively.
Property, plant and equipment, net - asset retirement obligations [Policy Text Block]	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.
Property, plant and equipment, net - impairment [Policy Text Block]	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 , 2019 , the impacts of regulation are considered when evaluating the carrying value of regulated assets.
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 Accounting Standards Codification ("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, 2019 and 2018 , trade receivables, net on the Consolidated Balance Sheets relate substantially to Customer Revenue, including unbilled revenue of $109 million and $106 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 $9 million and $- million as of December 31, 2019 and 2018 , 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.
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 lease obligations and corresponding right-of-use assets 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 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 right-of-use assets are recorded in other assets and the operating lease liabilities are recorded in current and long-term other liabilities accordingly. The right-of-use assets and lease liabilities for finance leases as of December 31, 2018 have been reclassified from property, plant and equipment, net and current portion of long-term and long-term debt, respectively, to conform to the current period presentation.
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 estimated 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.
Segment reporting	Segment Information Nevada Power currently has one segment, which includes its regulated electric utility operations.
New Accounting Pronouncements, Policy [Policy Text Block]	New Accounting Pronouncements In February 2016, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") No. 2016-02, which creates FASB Accounting Standards Codification ("ASC") Topic 842, "Leases" and supersedes Topic 840 "Leases." This guidance increases transparency and comparability among entities by recording lease assets and lease liabilities on the balance sheet and disclosing key information about leasing arrangements . A lessee should recognize on the balance sheet a liability to make lease payments (the lease liability) and a right-of-use asset representing its right to use the underlying asset for the lease term. The recognition, measurement and presentation of expenses and cash flows arising from a lease by a lessee have not significantly changed from previous guidance. Following the issuance of ASU No. 2016-02, the FASB issued several ASUs that clarified the implementation guidance for ASU No. 2016-02 but did not change the core principle of the guidance. Nevada Power has elected to utilize various practical expedients available to adopt ASU No. 2016-02, including (1) the package of three not requiring a reassessment of (i) whether any expired or existing contracts are or contain leases; (ii) the lease classification for any expired or existing leases; and (iii) initial direct costs for any existing leases; (2) using hindsight in determining the lease term; and (3) not requiring a reassessment of whether existing or expired land easements that were not previously accounted for as leases under ASC Topic 840 are or contain a lease under ASC Topic 842. Nevada Power adopted this guidance for all applicable contracts in-effect as of January 1, 2019 under a modified retrospective method and the adoption did not have a cumulative effect impact at the date of initial adoption.
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, 2019 , 2018 and 2017 .
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. 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).
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.
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.
Allowance for doubtful accounts [Policy Text Block]	Allowance for Doubtful Accounts Accounts receivable are stated at the outstanding principal amount, net of an estimated allowance for doubtful accounts. The allowance for doubtful accounts 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. Sierra Pacific also has the ability to assess deposits on customers who have delayed payments or who are deemed to be a credit risk. As of December 31, 2019 and 2018 , the allowance for doubtful accounts was $2 million and is included in trade receivables, net on the Balance Sheets.
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 $49 million and $44 million as of December 31 , 2019 and 2018 , respectively, and fuel, which includes coal stock, stored natural gas and fuel oil, totaling $8 million and $8 million as of December 31 , 2019 and 2018 , 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. 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 2019 and 2018 was 6.65% for electric, 5.75% and 5.74% for natural gas, respectively, and 6.55% for common facilities.
Property, plant and equipment, net - asset retirement obligations [Policy Text Block]	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.
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 , 2019 , the impacts of regulation are considered when evaluating the carrying value of regulated assets.
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 Accounting Standards Codification ("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, 2019 and 2018 , trade receivables, net on the Balance Sheets relate substantially to Customer Revenue, including unbilled revenue of $63 million and $57 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 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.
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 lease obligations and corresponding right-of-use assets 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 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 finance lease liabilities are recorded in current and long-term other liabilities accordingly. The right-of-use assets and lease liabilities for finance leases as of December 31, 2018 have been reclassified from property, plant and equipment, net and current portion of long-term and long-term debt, respectively, to conform to the current period presentation.
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 estimated 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.
New Accounting Pronouncements, Policy [Policy Text Block]	New Accounting Pronouncements In February 2016, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") No. 2016-02, which creates FASB Accounting Standards Codification ("ASC") Topic 842, "Leases" and supersedes Topic 840 "Leases." This guidance increases transparency and comparability among entities by recording lease assets and lease liabilities on the balance sheet and disclosing key information about leasing arrangements . A lessee should recognize on the balance sheet a liability to make lease payments (the lease liability) and a right-of-use asset representing its right to use the underlying asset for the lease term. The recognition, measurement and presentation of expenses and cash flows arising from a lease by a lessee have not significantly changed from previous guidance. Following the issuance of ASU No. 2016-02, the FASB issued several ASUs that clarified the implementation guidance for ASU No. 2016-02 but did not change the core principle of the guidance. Sierra Pacific has elected to utilize various practical expedients available to adopt ASU No. 2016-02, including (1) the package of three not requiring a reassessment of (i) whether any expired or existing contracts are or contain leases; (ii) the lease classification for any expired or existing leases; and (iii) initial direct costs for any existing leases; (2) using hindsight in determining the lease term; and (3) not requiring a reassessment of whether existing or expired land easements that were not previously accounted for as leases under ASC Topic 840 are or contain a lease under ASC Topic 842. Sierra Pacific adopted this guidance for all applicable contracts in-effect as of January 1, 2019 under a modified retrospective method and the adoption did not have a cumulative effect impact at the date of initial adoption.

Summary of Significant Accoun_3

Summary of Significant Accounting Policies Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2019
Accounting Policies [Abstract]
New Accounting Pronouncements, Policy [Policy Text Block]	New Accounting Pronouncements In February 2016, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") No. 2016-02, which creates FASB Accounting Standards Codification ("ASC") Topic 842, "Leases" and supersedes Topic 840 "Leases." This guidance increases transparency and comparability among entities by recording lease assets and lease liabilities on the balance sheet and disclosing key information about leasing arrangements. A lessee should recognize on the balance sheet a liability to make lease payments (the lease liability) and a right-of-use asset representing its right to use the underlying asset for the lease term. The recognition, measurement and presentation of expenses and cash flows arising from a lease by a lessee have not significantly changed from previous guidance. Following the issuance of ASU No. 2016-02, the FASB issued several ASUs that clarified the implementation guidance for ASU No. 2016-02 but did not change the core principle of the guidance. The Company has elected to utilize various practical expedients available to adopt ASU No. 2016-02, including (1) the package of three not requiring a reassessment of (i) whether any expired or existing contracts are or contain leases; (ii) the lease classification for any expired or existing leases; and (iii) initial direct costs for any existing leases; (2) using hindsight in determining the lease term; and (3) not requiring a reassessment of whether existing or expired land easements that were not previously accounted for as leases under ASC Topic 840 are or contain a lease under ASC Topic 842. The Company adopted this guidance for all applicable contracts in-effect as of January 1, 2019 under a modified retrospective method and the adoption did not have a cumulative effect impact at the date of initial adoption.
PacifiCorp [Member]
Accounting Policies [Abstract]
New Accounting Pronouncements, Policy [Policy Text Block]	New Accounting Pronouncements In February 2016, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") No. 2016-02, which creates FASB Accounting Standards Codification ("ASC") Topic 842, "Leases" and supersedes Topic 840 "Leases." This guidance increases transparency and comparability among entities by recording lease assets and lease liabilities on the balance sheet and disclosing key information about leasing arrangements. A lessee should recognize on the balance sheet a liability to make lease payments (the lease liability) and a right-of-use asset representing its right to use the underlying asset for the lease term. The recognition, measurement and presentation of expenses and cash flows arising from a lease by a lessee have not significantly changed from previous guidance. Following the issuance of ASU No. 2016-02, the FASB issued several ASUs that clarified the implementation guidance for ASU No. 2016-02 but did not change the core principle of the guidance. PacifiCorp has elected to utilize various practical expedients available to adopt ASU No. 2016-02, including (1) the package of three not requiring a reassessment of (i) whether any expired or existing contracts are or contain leases; (ii) the lease classification for any expired or existing leases; and (iii) initial direct costs for any existing leases; (2) using hindsight in determining the lease term; and (3) not requiring a reassessment of whether existing or expired land easements that were not previously accounted for as leases under ASC Topic 840 are or contain a lease under ASC Topic 842. PacifiCorp adopted this guidance for all applicable contracts in effect as of January 1, 2019 under a modified retrospective method and the adoption did not have a cumulative effect impact at the date of initial adoption.
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 2019 2018 Utility Plant: Generation 14 - 67 years $ 12,509 $ 12,606 Transmission 58 - 75 years 6,482 6,357 Distribution 20 - 70 years 7,307 7,030 Intangible plant (1) 5 - 75 years 1,016 970 Other 5 - 60 years 1,449 1,436 Utility plant in service 28,763 28,399 Accumulated depreciation and amortization (9,803 ) (10,034 ) Utility plant in service, net 18,960 18,365 Other non-regulated, net of accumulated depreciation and amortization 46 years 10 10 Plant, net 18,970 18,375 Construction work-in-progress 2,003 1,195 Property, plant and equipment, net $ 20,973 $ 19,570 (1) Computer software costs included in intangible plant are initially assigned a depreciable life of 5 to 10 years.
Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]	the allowance for doubtful accounts totaled $8 million and is included in trade receivables, net on the Consolidated Balance Sheets.
MidAmerican Energy Company [Member]
Accounting Policies [Abstract]
New Accounting Pronouncements, Policy [Policy Text Block]	New Accounting Pronouncements In February 2016, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") No. 2016-02, which creates FASB Accounting Standards Codification ("ASC") Topic 842, "Leases" and supersedes Topic 840 "Leases." This guidance increases transparency and comparability among entities by recording lease assets and lease liabilities on the balance sheet and disclosing key information about leasing arrangements. A lessee should recognize on the balance sheet a liability to make lease payments (the lease liability) and a right-of-use asset representing its right to use the underlying asset for the lease term. The recognition, measurement and presentation of expenses and cash flows arising from a lease by a lessee have not significantly changed from previous guidance. Following the issuance of ASU No. 2016-02, the FASB issued several ASUs that clarified the implementation guidance for ASU No. 2016-02 but did not change the core principle of the guidance. MidAmerican Energy has elected to utilize various practical expedients available to adopt ASU No. 2016-02, including (1) the package of three not requiring a reassessment of (i) whether any expired or existing contracts are or contain leases; (ii) the lease classification for any expired or existing leases; and (iii) initial direct costs for any existing leases; (2) using hindsight in determining the lease term; and (3) not requiring a reassessment of whether existing or expired land easements that were not previously accounted for as leases under ASC Topic 840 are or contain a lease under ASC Topic 842. MidAmerican Energy adopted this guidance for all applicable contracts in effect as of January 1, 2019 under a modified retrospective method, and the adoption did not have a cumulative effect impact at the date of initial adoption nor a material impact on MidAmerican Energy's Financial Statements and disclosures included within Notes to Financial Statements.
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 2019 2018 Utility plant in service: Generation 20-70 years $ 15,687 $ 13,727 Transmission 52-75 years 2,124 1,934 Electric distribution 20-75 years 4,095 3,672 Natural gas distribution 29-75 years 1,820 1,724 Utility plant in service 23,726 21,057 Accumulated depreciation and amortization (6,139 ) (5,941 ) Utility plant in service, net 17,587 15,116 Nonregulated property, net: Nonregulated property gross 20-50 years 7 7 Accumulated depreciation and amortization (1 ) (1 ) Nonregulated property, net 6 6 17,593 15,122 Construction work-in-progress 782 1,035 Property, plant and equipment, net $ 18,375 $ 16,157
Nevada Power Company [Member]
Accounting Policies [Abstract]
New Accounting Pronouncements, Policy [Policy Text Block]	New Accounting Pronouncements In February 2016, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") No. 2016-02, which creates FASB Accounting Standards Codification ("ASC") Topic 842, "Leases" and supersedes Topic 840 "Leases." This guidance increases transparency and comparability among entities by recording lease assets and lease liabilities on the balance sheet and disclosing key information about leasing arrangements . A lessee should recognize on the balance sheet a liability to make lease payments (the lease liability) and a right-of-use asset representing its right to use the underlying asset for the lease term. The recognition, measurement and presentation of expenses and cash flows arising from a lease by a lessee have not significantly changed from previous guidance. Following the issuance of ASU No. 2016-02, the FASB issued several ASUs that clarified the implementation guidance for ASU No. 2016-02 but did not change the core principle of the guidance. Nevada Power has elected to utilize various practical expedients available to adopt ASU No. 2016-02, including (1) the package of three not requiring a reassessment of (i) whether any expired or existing contracts are or contain leases; (ii) the lease classification for any expired or existing leases; and (iii) initial direct costs for any existing leases; (2) using hindsight in determining the lease term; and (3) not requiring a reassessment of whether existing or expired land easements that were not previously accounted for as leases under ASC Topic 840 are or contain a lease under ASC Topic 842. Nevada Power adopted this guidance for all applicable contracts in-effect as of January 1, 2019 under a modified retrospective method and the adoption did not have a cumulative effect impact at the date of initial adoption.
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 2019 2018 Utility plant: Generation 30 - 55 years $ 3,541 $ 3,720 Distribution 20 - 65 years 3,567 3,411 Transmission 45 - 70 years 1,444 1,439 General and intangible plant 5 - 65 years 741 716 Utility plant 9,293 9,286 Accumulated depreciation and amortization (2,951 ) (2,966 ) Utility plant, net 6,342 6,320 Other non-regulated, net of accumulated depreciation and amortization 45 years 1 1 Plant, net 6,343 6,321 Construction work-in-progress 195 97 Property, plant and equipment, net $ 6,538 $ 6,418
Sierra Pacific Power Company [Member]
Accounting Policies [Abstract]
New Accounting Pronouncements, Policy [Policy Text Block]	New Accounting Pronouncements In February 2016, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") No. 2016-02, which creates FASB Accounting Standards Codification ("ASC") Topic 842, "Leases" and supersedes Topic 840 "Leases." This guidance increases transparency and comparability among entities by recording lease assets and lease liabilities on the balance sheet and disclosing key information about leasing arrangements . A lessee should recognize on the balance sheet a liability to make lease payments (the lease liability) and a right-of-use asset representing its right to use the underlying asset for the lease term. The recognition, measurement and presentation of expenses and cash flows arising from a lease by a lessee have not significantly changed from previous guidance. Following the issuance of ASU No. 2016-02, the FASB issued several ASUs that clarified the implementation guidance for ASU No. 2016-02 but did not change the core principle of the guidance. Sierra Pacific has elected to utilize various practical expedients available to adopt ASU No. 2016-02, including (1) the package of three not requiring a reassessment of (i) whether any expired or existing contracts are or contain leases; (ii) the lease classification for any expired or existing leases; and (iii) initial direct costs for any existing leases; (2) using hindsight in determining the lease term; and (3) not requiring a reassessment of whether existing or expired land easements that were not previously accounted for as leases under ASC Topic 840 are or contain a lease under ASC Topic 842. Sierra Pacific adopted this guidance for all applicable contracts in-effect as of January 1, 2019 under a modified retrospective method and the adoption did not have a cumulative effect impact at the date of initial adoption.
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 2019 2018 Utility plant: Electric generation 25 - 60 years $ 1,133 $ 1,132 Electric distribution 20 - 100 years 1,669 1,568 Electric transmission 50 - 100 years 840 812 Electric general and intangible plant 5 - 70 years 178 185 Natural gas distribution 35 - 70 years 417 403 Natural gas general and intangible plant 5 - 70 years 14 14 Common general 5 - 70 years 338 321 Utility plant 4,589 4,435 Accumulated depreciation and amortization (1,629 ) (1,583 ) Utility plant, net 2,960 2,852 Other non-regulated, net of accumulated depreciation and amortization 70 years 2 5 Plant, net 2,962 2,857 Construction work-in-progress 113 90 Property, plant and equipment, net $ 3,075 $ 2,947

Property, Plant and Equipment_2

Property, Plant and Equipment, Net (Tables)	12 Months Ended
	Dec. 31, 2019
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 2019 2018 Regulated assets: Utility generation, transmission and distribution systems 5-80 years $ 81,127 $ 76,707 Interstate natural gas pipeline assets 3-80 years 8,165 7,524 89,292 84,231 Accumulated depreciation and amortization (26,353 ) (25,894 ) Regulated assets, net 62,939 58,337 Nonregulated assets: Independent power plants 5-30 years 6,983 6,826 Other assets 3-30 years 1,834 1,424 8,817 8,250 Accumulated depreciation and amortization (2,183 ) (1,610 ) Nonregulated assets, net 6,634 6,640 Net operating assets 69,573 64,977 Construction work-in-progress 3,732 3,110 Property, plant and equipment, net $ 73,305 $ 68,087
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 2019 2018 Utility plant in service: Generation 20-70 years $ 15,687 $ 13,727 Transmission 52-75 years 2,124 1,934 Electric distribution 20-75 years 4,095 3,672 Natural gas distribution 29-75 years 1,820 1,724 Utility plant in service 23,726 21,057 Accumulated depreciation and amortization (6,139 ) (5,941 ) Utility plant in service, net 17,587 15,116 Nonregulated property, net: Nonregulated property gross 20-50 years 7 7 Accumulated depreciation and amortization (1 ) (1 ) Nonregulated property, net 6 6 17,593 15,122 Construction work-in-progress 782 1,035 Property, plant and equipment, net $ 18,375 $ 16,157
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: 2019 2018 2017 Electric 3.1 % 2.9 % 2.6 % Natural gas 2.8 % 2.8 % 2.7 %
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 2019 2018 Utility Plant: Generation 14 - 67 years $ 12,509 $ 12,606 Transmission 58 - 75 years 6,482 6,357 Distribution 20 - 70 years 7,307 7,030 Intangible plant (1) 5 - 75 years 1,016 970 Other 5 - 60 years 1,449 1,436 Utility plant in service 28,763 28,399 Accumulated depreciation and amortization (9,803 ) (10,034 ) Utility plant in service, net 18,960 18,365 Other non-regulated, net of accumulated depreciation and amortization 46 years 10 10 Plant, net 18,970 18,375 Construction work-in-progress 2,003 1,195 Property, plant and equipment, net $ 20,973 $ 19,570 (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 2019 2018 Utility plant: Generation 30 - 55 years $ 3,541 $ 3,720 Distribution 20 - 65 years 3,567 3,411 Transmission 45 - 70 years 1,444 1,439 General and intangible plant 5 - 65 years 741 716 Utility plant 9,293 9,286 Accumulated depreciation and amortization (2,951 ) (2,966 ) Utility plant, net 6,342 6,320 Other non-regulated, net of accumulated depreciation and amortization 45 years 1 1 Plant, net 6,343 6,321 Construction work-in-progress 195 97 Property, plant and equipment, net $ 6,538 $ 6,418
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 2019 2018 Utility plant: Electric generation 25 - 60 years $ 1,133 $ 1,132 Electric distribution 20 - 100 years 1,669 1,568 Electric transmission 50 - 100 years 840 812 Electric general and intangible plant 5 - 70 years 178 185 Natural gas distribution 35 - 70 years 417 403 Natural gas general and intangible plant 5 - 70 years 14 14 Common general 5 - 70 years 338 321 Utility plant 4,589 4,435 Accumulated depreciation and amortization (1,629 ) (1,583 ) Utility plant, net 2,960 2,852 Other non-regulated, net of accumulated depreciation and amortization 70 years 2 5 Plant, net 2,962 2,857 Construction work-in-progress 113 90 Property, plant and equipment, net $ 3,075 $ 2,947

Jointly Owned Utility Facilit_2

Jointly Owned Utility Facilities (Tables)	12 Months Ended
	Dec. 31, 2019
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, 2019 (dollars in millions): Accumulated Construction Company Facility In Depreciation and Work-in- Share Service Amortization Progress PacifiCorp: Jim Bridger Nos. 1-4 67 % $ 1,476 $ 677 $ 9 Hunter No. 1 94 484 193 1 Hunter No. 2 60 305 121 2 Wyodak 80 473 243 1 Colstrip Nos. 3 and 4 10 254 137 2 Hermiston 50 181 92 5 Craig Nos. 1 and 2 19 368 252 — Hayden No. 1 25 75 39 — Hayden No. 2 13 43 23 — Transmission and distribution facilities Various 808 255 103 Total PacifiCorp 4,467 2,032 123 MidAmerican Energy: Louisa No. 1 88 % 834 458 7 Quad Cities Nos. 1 and 2 (1) 25 729 424 11 Walter Scott, Jr. No. 3 79 930 392 5 Walter Scott, Jr. No. 4 (2) 60 316 131 1 George Neal No. 4 41 316 171 2 Ottumwa No. 1 52 634 229 19 George Neal No. 3 72 489 238 4 Transmission facilities Various 258 95 — Total MidAmerican Energy 4,506 2,138 49 NV Energy: Navajo 11 % 13 2 — Valmy 50 390 271 — Transmission facilities Various 70 29 — On Line Transmission Line 25 159 24 — Total NV Energy 632 326 — BHE Pipeline Group - common facilities Various 266 157 — Total $ 9,871 $ 4,653 $ 172 (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 $458 million and $94 million , respectively.
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, 2019 (dollars in millions): Facility Accumulated Construction PacifiCorp in Depreciation and Work-in- Share Service Amortization Progress Jim Bridger Nos. 1 - 4 67 % $ 1,476 $ 677 $ 9 Hunter No. 1 94 484 193 1 Hunter No. 2 60 305 121 2 Wyodak 80 473 243 1 Colstrip Nos. 3 and 4 10 254 137 2 Hermiston 50 181 92 5 Craig Nos. 1 and 2 19 368 252 — Hayden No. 1 25 75 39 — Hayden No. 2 13 43 23 — Transmission and distribution facilities Various 808 255 103 Total $ 4,467 $ 2,032 $ 123
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, 2019 (dollars in millions): Accumulated Construction Company Plant in Depreciation and Work-in- Share Service Amortization Progress Louisa Unit No. 1 88 % $ 834 $ 458 $ 7 Quad Cities Unit Nos. 1 & 2 (1) 25 729 424 11 Walter Scott, Jr. Unit No. 3 79 930 392 5 Walter Scott, Jr. Unit No. 4 (2) 60 316 131 1 George Neal Unit No. 4 41 316 171 2 Ottumwa Unit No. 1 52 634 229 19 George Neal Unit No. 3 72 489 238 4 Transmission facilities Various 258 95 — Total $ 4,506 $ 2,138 $ 49 (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 $458 million and $94 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 , 2019 (dollars in millions): Nevada Construction Power's Utility Accumulated Work-in- Share Plant Depreciation Progress Navajo Generating Station (1) 11 % $ 13 $ 2 $ — ON Line Transmission Line 24 151 23 — Other transmission facilities Various 66 27 — Total $ 230 $ 52 $ — (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 , 2019 (dollars in millions): Sierra Construction Pacific's Utility Accumulated Work-in- Share Plant Depreciation Progress Valmy Generating Station 50 % $ 390 $ 271 $ — ON Line Transmission Line 1 8 1 — Valmy Transmission 50 4 2 — Total $ 402 $ 274 $ —

Leases Leases (Tables)

Leases Leases (Tables)	12 Months Ended
	Dec. 31, 2019
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, 2019 Right-of-use assets: Operating leases $ 525 Finance leases 504 Total right-of-use assets $ 1,029 Lease liabilities: Operating leases $ 577 Finance leases 519 Total lease liabilities $ 1,096
Lease, Cost [Table Text Block]	The following table summarizes the Company's lease costs (in millions): Year Ended December 31, 2019 Variable $ 623 Operating 170 Finance: Amortization 16 Interest 41 Short-term 7 Total lease costs $ 857 Weighted-average remaining lease term (years): Operating leases 7.6 Finance leases 28.8 Weighted-average discount rate: Operating leases 5.2 % Finance leases 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): Year Ended December 31, 2019 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ (153 ) Operating cash flows from finance leases (42 ) Financing cash flows from finance leases (19 ) Right-of-use assets obtained in exchange for lease liabilities: Operating leases $ 82 Finance leases 14
Operating and Finance Lease, Liability, Maturity [Table Text Block]	The Company has the following remaining lease commitments as of (in millions): December 31, 2019 Operating Finance Total 2020 $ 147 $ 71 $ 218 2021 126 77 203 2022 102 70 172 2023 73 59 132 2024 50 59 109 Thereafter 202 725 927 Total undiscounted lease payments 700 1,061 1,761 Less - amounts representing interest (123 ) (542 ) (665 ) Lease liabilities $ 577 $ 519 $ 1,096 December 31, 2018 (1) Operating Capital Total 2019 $ 147 $ 69 $ 216 2020 128 68 196 2021 110 73 183 2022 87 67 154 2023 61 56 117 Thereafter 159 772 931 Total undiscounted lease payments $ 692 $ 1,105 $ 1,797 (1) Amounts included for comparability and accounted for in accordance with ASC 840, "Leases". Sierra Pacific has the following remaining lease commitments as of (in millions): December 31, 2019 Operating Finance Total 2020 $ 2 $ 6 $ 8 2021 2 6 8 2022 1 6 7 2023 1 6 7 2024 1 5 6 Thereafter 26 46 72 Total undiscounted lease payments 33 75 108 Less - amounts representing interest (16 ) (30 ) (46 ) Lease liabilities $ 17 $ 45 $ 62 December 31, 2018 (1) Operating Capital Total 2019 $ 2 $ 6 $ 8 2020 2 4 6 2021 2 5 7 2022 1 4 5 2023 1 4 5 Thereafter 28 47 75 Total undiscounted lease payments $ 36 $ 70 $ 106 (1) Amounts included for comparability and accounted for in accordance with ASC Topic 840, "Leases".
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 Sheet (in millions): As of December 31, 2019 Right-of-use assets: Operating leases $ 12 Finance leases 19 Total right-of-use assets $ 31 Lease liabilities: Operating leases $ 12 Finance leases 19 Total lease liabilities $ 31
Lease, Cost [Table Text Block]	The following table summarizes PacifiCorp's lease costs (in millions): Year Ended December 31, 2019 Variable $ 77 Operating 3 Finance: Amortization 1 Interest 2 Short-term 2 Total lease costs $ 85 Weighted-average remaining lease term (years): Operating leases 14.0 Finance leases 9.1 Weighted-average discount rate: Operating leases 3.7 % Finance leases 10.6 %
Operating and Finance Lease, Liability, Maturity [Table Text Block]	PacifiCorp has the following remaining lease commitments as of (in millions): December 31, 2019 Operating Finance Total 2020 $ 2 $ 3 $ 5 2021 2 7 9 2022 2 3 5 2023 2 2 4 2024 1 2 3 Thereafter 7 14 21 Total undiscounted lease payments 16 31 47 Less - amounts representing interest (4 ) (12 ) (16 ) Lease liabilities $ 12 $ 19 $ 31 December 31, 2018 (1) Operating Capital Total 2019 $ 3 $ 4 $ 7 2020 3 4 7 2021 3 7 10 2022 2 3 5 2023 2 2 4 Thereafter 7 16 23 Total undiscounted lease payments $ 20 $ 36 $ 56 (1) Amounts included for comparability and accounted for in accordance with ASC 840, "Leases".
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 (in millions): As of December 31, 2019 Right-of-use assets: Operating leases $ 13 Finance leases 441 Total right-of-use assets $ 454 Lease liabilities: Operating leases $ 17 Finance leases 454 Total lease liabilities $ 471
Lease, Cost [Table Text Block]	The following table summarizes Nevada Power's lease costs (in millions): Year Ended December 31, 2019 Variable $ 434 Operating 3 Finance: Amortization 13 Interest 37 Total lease costs $ 487 Weighted-average remaining lease term (years): Operating leases 7.5 Finance leases 30.6 Weighted-average discount rate: Operating leases 4.5 % Finance leases 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 (in millions): Year Ended December 31, 2019 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ (3 ) Operating cash flows from finance leases (37 ) Financing cash flows from finance leases (14 ) Right-of-use assets obtained in exchange for lease liabilities: Finance leases $ 9
Operating and Finance Lease, Liability, Maturity [Table Text Block]	Nevada Power has the following remaining lease commitments as of (in millions): December 31, 2019 Operating Finance Total 2020 $ 3 $ 60 $ 63 2021 3 64 67 2022 3 62 65 2023 2 51 53 2024 2 52 54 Thereafter 7 664 671 Total undiscounted lease payments 20 953 973 Less - amounts representing interest (3 ) (499 ) (502 ) Lease liabilities $ 17 $ 454 $ 471 December 31, 2018 (1) Operating Capital Total 2019 $ 3 $ 59 $ 62 2020 3 59 62 2021 3 61 64 2022 3 60 63 2023 2 50 52 Thereafter 10 709 719 Total undiscounted lease payments $ 24 $ 998 $ 1,022 (1) Amounts included for comparability and accounted for in accordance with ASC Topic 840, "Leases " .
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 (in millions): As of December 31, 2019 Right-of-use assets: Operating leases $ 17 Finance leases 43 Total right-of-use assets $ 60 Lease liabilities: Operating leases $ 17 Finance leases 45 Total lease liabilities $ 62
Lease, Cost [Table Text Block]	The following table summarizes Sierra Pacific's lease costs (in millions): Year Ended December 31, 2019 Variable $ 69 Operating 1 Finance: Amortization 2 Interest 2 Total lease costs $ 74 Weighted-average remaining lease term (years): Operating leases 26.3 Finance leases 20.9 Weighted-average discount rate: Operating leases 5.0 % Finance leases 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 (in millions): Year Ended December 31, 2019 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ (3 ) Operating cash flows from finance leases (3 ) Financing cash flows from finance leases (3 ) Right-of-use assets obtained in exchange for lease liabilities: Finance leases $ 5

Regulatory Matters (Tables)

Regulatory Matters (Tables)	12 Months Ended
	Dec. 31, 2019
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 2019 2018 Employee benefit plans (1) 15 years $ 667 $ 773 Asset retirement obligations Various 445 375 Asset disposition costs Various 391 358 Deferred income taxes (2) Various 223 196 Deferred operating costs 11 years 134 141 Deferred net power costs 2 years 110 103 Unrealized loss on regulated derivative contracts 3 years 78 120 Unamortized contract values 4 years 60 79 Abandoned projects 3 years 58 134 Other Various 715 788 Total regulatory assets $ 2,881 $ 3,067 Reflected as: Current assets $ 115 $ 171 Noncurrent assets 2,766 2,896 Total regulatory assets $ 2,881 $ 3,067 (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 2019 2018 Deferred income taxes (1) Various $ 3,611 $ 3,923 Cost of removal (2) 27 years 2,370 2,426 Levelized depreciation 29 years 304 329 Asset retirement obligations 33 years 241 163 Impact fees 2 years 72 88 Other Various 713 577 Total regulatory liabilities $ 7,311 $ 7,506 Reflected as: Current liabilities $ 211 $ 160 Noncurrent liabilities 7,100 7,346 Total regulatory liabilities $ 7,311 $ 7,506 (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. See Note 12 for further discussion of 2017 Tax Reform impacts. (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 2019 2018 Employee benefit plans (1) 19 years $ 422 $ 448 Utah mine disposition (2) Various 125 136 Unamortized contract values 4 years 60 79 Deferred net power costs 2 years 106 62 Unrealized loss on derivative contracts 3 years 62 96 Asset retirement obligation 28 years 140 119 Other Various 208 172 Total regulatory assets $ 1,123 $ 1,112 Reflected as: Current assets $ 63 $ 36 Noncurrent assets 1,060 1,076 Total regulatory assets $ 1,123 $ 1,112 (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 net property, plant and equipment not considered probable of disallowance and for the portion of losses associated with the assets held for sale, UMWA 1974 Pension Plan withdrawal and closure costs incurred to date considered probable of recove
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 2019 2018 Cost of removal (1) 26 years $ 1,019 $ 994 Deferred income taxes (2) Various 1,653 1,803 Other Various 297 258 Total regulatory liabilities $ 2,969 $ 3,055 Reflected as: Current liabilities $ 56 $ 77 Noncurrent liabilities 2,913 2,978 Total regulatory liabilities $ 2,969 $ 3,055 (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): Average Remaining Life 2019 2018 Asset retirement obligations (1) 6 years $ 223 $ 160 Employee benefit plans (2) 12 years 26 62 Unrealized loss on regulated derivative contracts 1 year 7 19 Other Various 33 32 Total $ 289 $ 273 (1) Amount predominantly relates to asset retirement obligations for fossil-fueled and wind-powered generating facilities. Refer to Note 11 for a discussion of asset retirement obligations. (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. Mi
Regulatory Liabilities [Table Text Block]	latory liabilities represent income to be recognized or amounts 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): Average Remaining Life 2019 2018 Cost of removal accrual (1) 29 years $ 572 $ 708 Deferred income taxes (2) Various 478 626 Asset retirement obligations (3) 33 years 241 160 Employee benefit plans (4) 10 years 32 — Pre-funded AFUDC on transmission MVPs (5) 53 years 35 36 Iowa electric revenue sharing accrual (6) 1 year 22 70 Other Various 26 20 Total $ 1,406 $ 1,620 (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 asset retirement obligation. Refer to Note 11 for a discussion of asset retirement obligations. (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.
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 2019 2018 Decommissioning costs (2) 3 years $ 241 $ 222 Deferred operating costs 9 years 136 152 Merger costs from 1999 merger 25 years 120 125 Employee benefit plans (1) 8 years 87 105 Asset retirement obligations 6 years 67 68 Legacy meters 13 years 49 53 ON Line deferrals 34 years 45 46 Abandoned projects 1 year 12 46 Deferred energy costs 1 year — 47 Other Various 44 53 Total regulatory assets $ 801 $ 917 Reflected as: Current assets $ 1 $ 39 Noncurrent assets 800 878 Total regulatory assets $ 801 $ 917 (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 $104 million and $81 million as of December 31 , 2019 and 2018 , 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 2019 2018 Deferred income taxes (1) Various $ 681 $ 677 Cost of removal (2) 33 years 332 320 Impact fees (3) 2 years 72 86 Other Various 171 103 Total regulatory liabilities $ 1,256 $ 1,186 Reflected as: Current liabilities $ 93 $ 49 Noncurrent liabilities 1,163 1,137 Total regulatory liabilities $ 1,256 $ 1,186 (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 2019 2018 Employee benefit plans (1) 8 years $ 107 $ 132 Merger costs from 1999 merger 27 years 71 74 Abandoned projects 7 years 24 29 Deferred Operating Costs 12 years 23 15 Losses on reacquired debt 15 years 17 19 Other Various 53 52 Total regulatory assets $ 295 $ 321 Reflected as: Current assets $ 12 $ 7 Noncurrent assets 283 314 Total regulatory assets $ 295 $ 321 (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 2019 2018 Deferred income taxes (1) Various $ 263 $ 270 Cost of removal (2) 38 years 217 210 Other Various 58 29 Total regulatory liabilities $ 538 $ 509 Reflected as: Current liabilities $ 49 $ 18 Noncurrent liabilities 489 491 Total regulatory liabilities $ 538 $ 509 (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.

Investments and Restricted Ca_2

Investments and Restricted Cash and Investments (Tables)	12 Months Ended
	Dec. 31, 2019
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): 2019 2018 Investments: BYD Company Limited common stock $ 1,122 $ 1,435 Rabbi trusts 410 371 Other 187 168 Total investments 1,719 1,974 Equity method investments: BHE Renewables tax equity investments 3,130 1,661 Electric Transmission Texas, LLC 555 527 Bridger Coal Company 81 99 Other 181 153 Total equity method investments 3,947 2,440 Restricted cash and cash equivalents and investments: Quad Cities Station nuclear decommissioning trust funds 599 504 Other restricted cash and cash equivalents 230 256 Total restricted cash and cash equivalents and investments 829 760 Total investments and restricted cash and cash equivalents and investments $ 6,495 $ 5,174 Reflected as: Other current assets $ 240 $ 271 Noncurrent assets 6,255 4,903 Total investments and restricted cash and cash equivalents and investments $ 6,495 $ 5,174
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): 2019 2018 Nuclear decommissioning trust $ 599 $ 504 Rabbi trusts 203 191 Other 16 13 Total $ 818 $ 708

BHE Debt (Tables)

BHE Debt (Tables)	12 Months Ended
	Dec. 31, 2019
MEHC 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 2019 2018 2.40% Senior Notes, due 2020 $ 350 $ 349 $ 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 3.25% Senior Notes, due 2028 600 594 594 8.48% Senior Notes, due 2028 256 259 257 6.125% Senior Bonds, due 2036 1,670 1,661 1,661 5.95% Senior Bonds, due 2037 550 548 547 6.50% Senior Bonds, due 2037 225 223 222 5.15% Senior Notes, due 2043 750 740 740 4.50% Senior Notes, due 2045 750 738 738 3.80% Senior Notes, due 2048 750 737 737 4.45% Senior Notes, due 2049 1,000 990 990 Total BHE Senior Debt $ 8,651 $ 8,581 $ 8,577 Reflected as: Current liabilities $ 350 $ — Noncurrent liabilities 8,231 8,577 Total BHE Senior Debt $ 8,581 $ 8,577 Junior Subordinated Debentures BHE junior subordinated debentures consists of the following as of December 31 (in millions): Par Value 2019 2018 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 2019 2018 PacifiCorp $ 7,705 $ 7,658 $ 7,015 MidAmerican Funding 7,515 7,427 5,597 NV Energy 3,836 3,821 3,817 Northern Powergrid 3,234 3,221 2,626 BHE Pipeline Group 1,250 1,247 1,042 BHE Transmission 3,891 3,879 3,842 BHE Renewables 3,239 3,206 3,401 HomeServices 213 213 233 Total subsidiary debt $ 30,883 $ 30,672 $ 27,573 Reflected as: Current liabilities $ 2,189 $ 2,081 Noncurrent liabilities 28,483 25,492 Total subsidiary debt $ 30,672 $ 27,573 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 2019 2018 First mortgage bonds: 2.40%, due 2019 $ — $ — $ 500 3.70%, due 2023 250 249 249 3.50%, due 2024 500 501 500 3.10%, due 2027 375 373 372 3.65%, due 2029 850 864 — 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 700 688 688 4.25%, due 2049 900 872 — 3.15%, due 2050 600 591 — Notes: 6.75% Series, due 2031 400 396 396 5.75% Series, due 2035 300 298 298 5.8% Series, due 2036 350 348 347 Transmission upgrade obligation, 4.45% and 3.42% due through 2035 and 2036, respectively 6 4 5 Variable-rate tax-exempt bond obligation series: (weighted average interest rate- 2019-1.66%, 2018-1.74%): 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 $ 7,208 $ 5,379

Short-Term Debt and Credit Fa_2

Short-Term Debt and Credit Facilities (Tables)	12 Months Ended
	Dec. 31, 2019
Line of Credit Facility [Line Items]
Short-term Debt [Text Block]	Short-Term Debt and Credit Facilities 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) 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 2018: Credit facilities (2) $ 3,500 $ 1,200 $ 1,309 $ 650 $ 231 $ 639 $ 1,585 $ 9,114 Less: Short-term debt (983 ) (30 ) (240 ) — (77 ) (345 ) (841 ) (2,516 ) Tax-exempt bond support and letters of credit — (89 ) (370 ) (80 ) — (4 ) — (543 ) Net credit facilities $ 2,517 $ 1,081 $ 699 $ 570 $ 154 $ 290 $ 744 $ 6,055 (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 $39 million at Northern Powergrid. As of December 31, 2019 , 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 and 2018 , the weighted average interest rate on commercial paper borrowings outstanding was 1.91% and 2.76% , respectively. 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, 2019 and 2018 , BHE had $107 million and $115 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 2021 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, 2019 and 2018 , the weighted average interest rate on commercial paper borrowings outstanding was 2.05% and 2.85% , 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, 2019 and 2018 , PacifiCorp had $13 million and $184 million , respectively, of fully available letters of credit issued under committed arrangements. As of December 31, 2019 and 2018 , $13 million and $14 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 Funding MidAmerican Energy has a $900 million unsecured credit facility expiring in June 2022. The credit facility supports MidAmerican Energy's commercial paper program and its variable-rate tax-exempt bond obligations, provides for the issuance of letters of credit and 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 $400 million unsecured credit facility that expires in August 2020 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, 2018, MidAmerican Energy had a $400 million unsecured credit facility expiring November 2019, which it terminated in January 2019. MidAmerican Energy had commercial paper borrowings outstanding of $- million as of December 31, 2019 , and $240 million with a weighted average interest rate of 2.49% as of December 31, 2018 . 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 expiring in October 2022. 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) Limited 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 2023 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 2023 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. As of December 31, 2019 and 2018 , AltaLink had $192 million and $281 million outstanding under these facilities at a weighted average interest rate of 2.16% and 2.26% , 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 2023 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. As of December 31, 2019 and 2018 , AltaLink Investments, L.P. had $19 million and $64 million outstanding under this facility at a weighted average interest rate of 3.08% and 3.25% , respectively. The credit facility requires 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. In January 2020, AltaLink and AltaLink Investments, L.P. extended, with lender consent, the expiration dates for the existing credit facilities to December 2024. 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, 2019 and 2018 , HomeServices had $318 million and $404 million , respectively, outstanding under its credit facility with a weighted average interest rate of 3.29% and 3.94% , respectively. Through its subsidiaries, HomeServices maintains mortgage lines of credit totaling $1.3 billion and $985 million as of December 31, 2019 and 2018 , respectively, used for mortgage banking activities that expire beginning in January 2020 through December 2020. 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, 2019 and 2018 , HomeServices had $965 million and $436 million , respectively, outstanding under these mortgage lines of credit at a weighted average interest rate of 3.51% and 4.42% , respectively. BHE Renewables Letters of Credit As of December 31, 2019 and 2018 , certain renewable projects collectively have letters of credit outstanding of $373 million and $322 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) 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 2018: Credit facilities (2) $ 3,500 $ 1,200 $ 1,309 $ 650 $ 231 $ 639 $ 1,585 $ 9,114 Less: Short-term debt (983 ) (30 ) (240 ) — (77 ) (345 ) (841 ) (2,516 ) Tax-exempt bond support and letters of credit — (89 ) (370 ) (80 ) — (4 ) — (543 ) Net credit facilities $ 2,517 $ 1,081 $ 699 $ 570 $ 154 $ 290 $ 744 $ 6,055 (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 $39 million at Northern Powergrid.
Sierra Pacific Power Company [Member]
Line of Credit Facility [Line Items]
Short-term Debt [Text Block]	Credit Facility The following table summarizes Sierra Pacific's availability under its credit facilities as of December 31 (in millions): 2019 2018 Credit facilities $ 250 $ 250 Less - Water Facilities Refunding Revenue Bond support — (80 ) Net credit facilities $ 250 $ 170 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 , 2019 and 2018 , Sierra Pacific had no borrowings outstanding under the credit facility. 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): 2019 2018 Credit facilities $ 250 $ 250 Less - Water Facilities Refunding Revenue Bond support — (80 ) Net credit facilities $ 250 $ 170
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): 2019: Credit facilities $ 1,200 Less: Short-term debt (130 ) Tax-exempt bond support (256 ) Net credit facilities $ 814 2018: Credit facilities $ 1,200 Less: Short-term debt (30 ) Tax-exempt bond support (89 ) Net credit facilities $ 1,081 As of December 31, 2019 , 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, 2019 and 2018 , the weighted average interest rate on commercial paper borrowings outstanding was 2.05% and 2.85% , 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, 2019 and 2018 , PacifiCorp had $13 million and $184 million , respectively, of fully available letters of credit issued under committed arrangements. As of December 31, 2019 and 2018 , $13 million and $14 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): 2019: Credit facilities $ 1,200 Less: Short-term debt (130 ) Tax-exempt bond support (256 ) Net credit facilities $ 814 2018: Credit facilities $ 1,200 Less: Short-term debt (30 ) Tax-exempt bond support (89 ) Net credit facilities $ 1,081
MidAmerican Energy Company [Member]
Line of Credit Facility [Line Items]
Short-term Debt [Text Block]	Short-Term Debt and Credit Facilities 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. MidAmerican Energy has a $900 million unsecured credit facility expiring June 2022. The credit facility supports MidAmerican Energy's commercial paper program and its variable-rate tax-exempt bond obligations, provides for the issuance of letters of credit and 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 $400 million unsecured credit facility that expires in August 2020 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 in June 2020 and has a variable interest rate based on the Eurodollar rate plus a spread. As of December 31, 2018, MidAmerican Energy had a $400 million unsecured credit facility expiring November 2019, which was terminated in January 2019. MidAmerican Energy had commercial paper borrowings outstanding of $- million as of December 31, 2019 , and $240 million with a weighted average interest rate of 2.49% as of December 31, 2018 . The $900 million and $400 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, 2019 , 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 $1.3 billion through July 31, 2020. The following table summarizes MidAmerican Energy's availability under its two unsecured revolving credit facilities as of December 31 (in millions): 2019 2018 Credit facilities $ 1,305 $ 1,305 Less: Short-term debt outstanding — (240 ) Variable-rate tax-exempt bond support (370 ) (370 ) Net credit facilities $ 935 $ 695
Short-Term Debt and Credit Facilities [Table Text Block]	The following table summarizes MidAmerican Energy's availability under its two unsecured revolving credit facilities as of December 31 (in millions): 2019 2018 Credit facilities $ 1,305 $ 1,305 Less: Short-term debt outstanding — (240 ) Variable-rate tax-exempt bond support (370 ) (370 ) Net credit facilities $ 935 $ 695
Nevada Power Company [Member]
Line of Credit Facility [Line Items]
Short-term Debt [Text Block]	Credit Facility 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 , 2019 and 2018 , 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, 2019
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 2019 2018 2.40% Senior Notes, due 2020 $ 350 $ 349 $ 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 3.25% Senior Notes, due 2028 600 594 594 8.48% Senior Notes, due 2028 256 259 257 6.125% Senior Bonds, due 2036 1,670 1,661 1,661 5.95% Senior Bonds, due 2037 550 548 547 6.50% Senior Bonds, due 2037 225 223 222 5.15% Senior Notes, due 2043 750 740 740 4.50% Senior Notes, due 2045 750 738 738 3.80% Senior Notes, due 2048 750 737 737 4.45% Senior Notes, due 2049 1,000 990 990 Total BHE Senior Debt $ 8,651 $ 8,581 $ 8,577 Reflected as: Current liabilities $ 350 $ — Noncurrent liabilities 8,231 8,577 Total BHE Senior Debt $ 8,581 $ 8,577 Junior Subordinated Debentures BHE junior subordinated debentures consists of the following as of December 31 (in millions): Par Value 2019 2018 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 2019 2018 PacifiCorp $ 7,705 $ 7,658 $ 7,015 MidAmerican Funding 7,515 7,427 5,597 NV Energy 3,836 3,821 3,817 Northern Powergrid 3,234 3,221 2,626 BHE Pipeline Group 1,250 1,247 1,042 BHE Transmission 3,891 3,879 3,842 BHE Renewables 3,239 3,206 3,401 HomeServices 213 213 233 Total subsidiary debt $ 30,883 $ 30,672 $ 27,573 Reflected as: Current liabilities $ 2,189 $ 2,081 Noncurrent liabilities 28,483 25,492 Total subsidiary debt $ 30,672 $ 27,573 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 2019 2018 First mortgage bonds: 2.40%, due 2019 $ — $ — $ 500 3.70%, due 2023 250 249 249 3.50%, due 2024 500 501 500 3.10%, due 2027 375 373 372 3.65%, due 2029 850 864 — 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 700 688 688 4.25%, due 2049 900 872 — 3.15%, due 2050 600 591 — Notes: 6.75% Series, due 2031 400 396 396 5.75% Series, due 2035 300 298 298 5.8% Series, due 2036 350 348 347 Transmission upgrade obligation, 4.45% and 3.42% due through 2035 and 2036, respectively 6 4 5 Variable-rate tax-exempt bond obligation series: (weighted average interest rate- 2019-1.66%, 2018-1.74%): 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 $ 7,208 $ 5,379
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, 2020 and thereafter, excluding fair value adjustments and unamortized premiums, discounts and debt issuance costs, are as follows (in millions): 2025 and 2020 2021 2022 2023 2024 Thereafter Total BHE senior notes $ 350 $ 450 $ — $ 900 $ — $ 6,951 $ 8,651 BHE junior subordinated debentures — — — — — 100 100 PacifiCorp 38 420 605 449 591 5,602 7,705 MidAmerican Funding — — — 315 535 6,665 7,515 NV Energy 890 — — 250 — 2,696 3,836 Northern Powergrid 480 32 498 34 35 2,155 3,234 BHE Pipeline Group — 200 — — — 1,050 1,250 BHE Transmission 251 1 366 386 270 2,617 3,891 BHE Renewables 503 172 170 174 184 2,036 3,239 HomeServices 27 33 153 — — — 213 Totals $ 2,539 $ 1,308 $ 1,792 $ 2,508 $ 1,615 $ 29,872 $ 39,634
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, 2020 , and thereafter, excluding unamortized premiums, discounts and debt issuance costs, are as follows (in millions): 2020 $ — 2021 — 2022 1 2023 315 2024 535 2025 and thereafter 6,425
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 2019 2018 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: 1.250% Pollution Control Series 2016A, due 2029 — — 20 1.850% Pollution Control Series 2016B, due 2029 (1) 30 29 — 1.500% Gas Facilities Series 2016A, due 2031 — — 58 3.000% Gas and Water Series 2016B, due 2036 (2) 60 62 62 1.850% Water Facilities Series 2016C, due 2036 (3) — — 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 — 1.850% Water Facilities Series 2016G, due 2036 (1) 20 20 — Total long-term debt $ 1,137 $ 1,135 $ 1,120 Reflected as - Long-term debt $ 1,135 $ 1,120 (1) Subject to mandatory purchase by Sierra Pacific in April 2022 at which date the interest rate may be adjusted from time to time. (2) Subject to mandatory purchase by Sierra Pacific in June 2022 at which date the interest rate may be adjusted from time to time. (3) Bond was purchased by Sierra Pacific during 2019. As of December 31, 2018 the bond variable interest rate was 1.750% to 1.820% . (4) Bonds were purchased by Sierra Pacific during 2019 and re-offered at a fixed interest rate. As of December 31, 2018 the bonds variable interest rate was 1.750% to 1.820% .
Maturities of Long-term Debt [Table Text Block]	The annual repayments of long-term debt for the years beginning January 1, 2020 and thereafter, are as follows (in millions): 2023 $ 250 2025 and thereafter 887 Total 1,137 Unamortized premium, discount and debt issuance cost (2 ) Total $ 1,135
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 2019 2018 General and refunding mortgage securities: 7.125% Series V, due 2019 $ — $ — $ 500 2.750%, Series BB, due 2020 575 575 574 3.700%, Series CC, due 2029 500 496 — 6.650% Series N, due 2036 367 358 358 6.750% Series R, due 2037 349 346 346 5.375% Series X, due 2040 250 248 247 5.450% Series Y, due 2041 250 237 236 Tax-exempt refunding revenue bond obligations: Fixed-rate series: 1.800% Pollution Control Bonds Series 2017A, due 2032 (1) 40 39 40 1.600% Pollution Control Bonds Series 2017, due 2036 (1) 40 39 39 1.600% Pollution Control Bonds Series 2017B, due 2039 (1) 13 13 13 Total long-term debt $ 2,384 $ 2,351 $ 2,353 Reflected as: Current portion of long-term debt $ 575 $ 500 Long-term debt 1,776 1,853 Total long-term debt $ 2,351 $ 2,353 (1) Subject to mandatory purchase by Nevada Power in May 2020 at which date the interest rate may be adjusted from time to time.
Maturities of Long-term Debt [Table Text Block]	The annual repayments of long-term debt for the years beginning January 1, 2020 and thereafter, are as follows (in millions): 2020 $ 575 2025 and thereafter 1,809 Total 2,384 Unamortized premium, discount and debt issuance cost (33 ) Total $ 2,351
PacifiCorp [Member]
Debt Instrument [Line Items]
Subsidiary Debt [Table Text Block]	PacifiCorp's long-term debt was as follows as of December 31 (dollars in millions): 2019 2018 Average Average Principal Carrying Interest Carrying Interest Amount Value Rate Value Rate First mortgage bonds: 2.95% to 8.53%, due through 2024 $ 1,899 $ 1,895 4.09 % $ 2,244 4.31 % 3.35% to 6.71%, due 2025 to 2026 350 349 4.31 348 4.31 3.50% to 7.70%, due 2029 to 2031 700 696 5.30 298 7.70 5.25% to 6.35%, due 2034 to 2038 2,350 2,338 5.96 2,338 5.96 4.10% to 6.00%, due 2039 to 2042 950 939 5.40 939 5.40 4.13% to 4.15%, due 2049 to 2050 1,200 1,186 4.14 593 4.13 Variable-rate series, tax-exempt bond obligations (2019-1.60% to 1.80%; 2018-1.67% to 1.85%): Due 2020 38 38 1.78 38 1.85 Due 2024 (1)(2) 143 143 1.73 142 1.68 Due 2025 (1) 25 24 1.75 25 1.75 Due 2024 to 2025 (2) 50 50 1.63 50 1.75 Total long-term debt $ 7,705 $ 7,658 $ 7,015 Reflected as: 2019 2018 Current portion of long-term debt $ 38 $ 350 Long-term debt 7,620 6,665 Total long-term debt $ 7,658 $ 7,015 1) Supported by $170 million of fully available letters of credit issued under committed bank arrangements as of December 31, 2018 . These arrangements were canceled in 2019. 2) 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.
Maturities of Long-term Debt [Table Text Block]	As of December 31, 2019 , the annual principal maturities of long-term debt for 2020 and thereafter are as follows (in millions): Long-term Debt 2020 $ 38 2021 420 2022 605 2023 449 2024 591 Thereafter 5,602 Total 7,705 Unamortized discount and debt issuance costs (47 ) Total $ 7,658
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 2019 2018 Northern Natural Gas: 4.25% Senior Notes, due 2021 $ 200 $ 200 $ 199 5.80% Senior Bonds, due 2037 150 149 149 4.10% Senior Bonds, due 2042 250 248 248 4.30% Senior Bonds, due 2049 650 650 446 Total BHE Pipeline Group $ 1,250 $ 1,247 $ 1,042
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 2019 2018 First mortgage bonds: 2.95% to 8.53%, due through 2024 $ 1,899 $ 1,895 $ 2,244 3.35% to 6.71%, due 2025 to 2026 350 349 348 3.50% to 7.70%, due 2029 to 2031 700 696 298 5.25% to 6.35%, due 2034 to 2038 2,350 2,338 2,338 4.10% to 6.00%, due 2039 to 2042 950 939 939 4.13% to 4.15%, due 2049 to 2050 1,200 1,186 593 Variable-rate series, tax-exempt bond obligations (2019-1.60% to 1.80%; 2018-1.67% to 1.85%): Due 2020 38 38 38 Due 2024 (1)(2) 143 143 142 Due 2025 (1) 25 24 25 Due 2024 to 2025 (2) 50 50 50 Total PacifiCorp $ 7,705 $ 7,658 $ 7,015 (1) Supported by $170 million of fully available letters of credit issued under committed bank arrangements as of December 31, 2018. These arrangements were canceled in 2019. (2) 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 2019 2018 MidAmerican Funding: 6.927% Senior Bonds, due 2029 $ 239 $ 219 $ 217 MidAmerican Energy: Tax-exempt bond obligations - Variable-rate tax-exempt bond obligation series: (weighted average interest rate- 2019-1.66%, 2018-1.74%), due 2023-2047 $ 370 $ 368 $ 368 First Mortgage Bonds: 2.40%, due 2019 — — 500 3.70%, due 2023 250 249 249 3.50%, due 2024 500 501 501 3.10%, due 2027 375 373 372 3.65%, due 2029 850 864 — 4.80%, due 2043 350 346 346 4.40%, due 2044 400 395 394 4.25%, due 2046 450 445 445 3.95%, due 2047 475 470 470 3.65%, due 2048 700 688 688 4.25%, due 2049 900 872 — 3.15%, due 2050 600 591 — Notes: 6.75% Series, due 2031 400 396 396 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 5 Total MidAmerican Energy 7,276 7,208 5,380 Total MidAmerican Funding $ 7,515 $ 7,427 $ 5,597
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 2019 2018 NV Energy: 6.250% Senior Notes, due 2020 $ 315 $ 321 $ 330 Nevada Power: General and refunding mortgage securities: 7.125% Series V, due 2019 — — 500 2.750%, Series BB, due 2020 575 575 574 3.700%, Series CC, due 2029 500 496 — 6.650% Series N, due 2036 367 360 360 6.750% Series R, due 2037 349 348 348 5.375% Series X, due 2040 250 249 248 5.450% Series Y, due 2041 250 245 244 Tax-exempt refunding revenue bond obligations: Fixed-rate series: 1.800% Pollution Control Bonds Series 2017A, due 2032 (1) 40 39 40 1.600% Pollution Control Bonds Series 2017, due 2036 (1) 40 39 39 1.600% Pollution Control Bonds Series 2017B, due 2039 (1) 13 13 13 Total Nevada Power 2,384 2,364 2,366 Sierra Pacific: 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 252 256 256 Tax-exempt refunding revenue bond obligations: Fixed-rate series: 1.250% Pollution Control Series 2016A, due 2029 — — 20 1.850% Pollution Control Series 2016B, due 2029 (2) 30 29 — 1.500% Gas Facilities Series 2016A, due 2031 — — 58 3.000% Gas and Water Series 2016B, due 2036 (3) 60 62 62 1.850% Water Facilities Series 2016C, due 2036 (4) — — 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 — 1.850% Water Facilities Series 2016G, due 2036 (2) 20 20 — Total Sierra Pacific 1,137 1,136 1,121 Total NV Energy $ 3,836 $ 3,821 $ 3,817
Northern Powergrid Holdings [Member]
Debt Instrument [Line Items]
Subsidiary Debt [Table Text Block]	gages. Northern Powergrid Northern Powergrid and its subsidiaries' 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) 2019 2018 8.875% Bonds, due 2020 $ 133 $ 135 $ 133 9.25% Bonds, due 2020 265 265 260 4.133% to 4.586% European Investment Bank loans, due 2019 to 2022 251 252 293 7.25% Bonds, due 2022 265 270 262 2.50% Bonds, due 2025 199 197 189 2.073% European Investment Bank loan, due 2025 66 68 65 2.564% European Investment Bank loans, due 2027 332 330 318 7.25% Bonds, due 2028 246 250 241 4.375% Bonds, due 2032 199 196 188 5.125% Bonds, due 2035 265 262 252 5.125% Bonds, due 2035 199 197 189 2.750% Bonds, due 2049 199 196 — 2.250% Bonds, due 2059 398 389 — Variable-rate bond, due 2026 (2) 217 214 236 Total Northern Powergrid $ 3,234 $ 3,221 $ 2,626 (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 86% of the outstanding debt. The variable interest rate as of December 31, 2019 was 2.54% while the fixed interest rate was 2.82% .
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) 2019 2018 AltaLink Investments, L.P.: Series 12-1 Senior Bonds, 3.674%, due 2019 $ — $ — $ 148 Series 13-1 Senior Bonds, 3.265%, due 2020 154 154 148 Series 15-1 Senior Bonds, 2.244%, due 2022 154 154 146 Total AltaLink Investments, L.P. 308 308 442 AltaLink, L.P.: Series 2013-2 Notes, 3.621%, due 2020 96 96 92 Series 2012-2 Notes, 2.978%, due 2022 212 212 201 Series 2013-4 Notes, 3.668%, due 2023 385 384 366 Series 2014-1 Notes, 3.399%, due 2024 269 269 256 Series 2016-1 Notes, 2.747%, due 2026 269 269 255 Series 2006-1 Notes, 5.249%, due 2036 115 115 109 Series 2010-1 Notes, 5.381%, due 2040 96 96 91 Series 2010-2 Notes, 4.872%, due 2040 115 115 109 Series 2011-1 Notes, 4.462%, due 2041 212 211 201 Series 2012-1 Notes, 3.990%, due 2042 404 398 380 Series 2013-3 Notes, 4.922%, due 2043 269 268 256 Series 2014-3 Notes, 4.054%, due 2044 227 226 215 Series 2015-1 Notes, 4.090%, due 2045 269 268 255 Series 2016-2 Notes, 3.717%, due 2046 346 345 328 Series 2013-1 Notes, 4.446%, due 2053 192 192 183 Series 2014-2 Notes, 4.274%, due 2064 100 100 95 Total AltaLink, L.P. 3,576 3,564 3,392 Other: Construction Loan, 5.620%, due 2020 7 7 8 Total BHE Transmission $ 3,891 $ 3,879 $ 3,842 (1) The par values for these debt instruments are denominated in Canadian dollars.
BHE Renewables [Member]
Debt Instrument [Line Items]
Subsidiary Debt [Table Text Block]	llars. 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 2019 2018 Fixed-rate (1) : Bishop Hill Holdings Senior Notes, 5.125%, due 2032 $ 78 $ 77 $ 84 Solar Star Funding Senior Notes, 3.950%, due 2035 283 280 292 Solar Star Funding Senior Notes, 5.375%, due 2035 894 886 915 Grande Prairie Wind Senior Notes, 3.860%, due 2037 358 355 392 Topaz Solar Farms Senior Notes, 5.750%, due 2039 680 672 709 Topaz Solar Farms Senior Notes, 4.875%, due 2039 195 193 205 Alamo 6 Senior Notes, 4.170%, due 2042 216 213 221 Other 13 13 16 Variable-rate (1) : Pinyon Pines I and II Term Loans, due 2020 (2) 284 284 310 TX Jumbo Road Term Loan, due 2025 (2) 161 158 176 Marshall Wind Term Loan, due 2026 (2) 77 75 81 Total BHE Renewables $ 3,239 $ 3,206 $ 3,401 (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 75% of the Pinyon Pines outstanding debt through December 31, 2019 and 50% of the Pinyon Pines outstanding debt thereafter, and 100% of the TX Jumbo Road and Marshall Wind outstanding debt. The variable interest rate as of December 31, 2019 and 2018 was 3.69% and 4.55%, respectively, while the fixed interest rates as of December 31, 2019 and 2018 ranged from 3.21% to 5.41% . In January 2020, Pinyon Pines I and II repaid $284 million of its variable-rate term loans. This debt was refinanced with $382 million of fifteen year variable-rate term loans due December 2034. The new term loans amortize semiannually and 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 new term loans.
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 2019 2018 Variable-rate: Variable-rate term loan (2019 - 3.299%, 2018 - 4.022%), due 2022 (1) $ 213 $ 213 $ 233 (1) Term loan amortizes quarterly and variable-rate resets monthly.

Risk Management and Hedging A_2

Risk Management and Hedging Activities (Tables) - PacifiCorp [Member]	12 Months Ended
	Dec. 31, 2019
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, 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 ) As of December 31, 2018: Not designated as hedging contracts (1) : Commodity assets $ 36 $ 4 $ 10 $ 1 $ 51 Commodity liabilities (9 ) (1 ) (67 ) (71 ) (148 ) Total 27 3 (57 ) (70 ) (97 ) Total derivatives 27 3 (57 ) (70 ) (97 ) Cash collateral (payable) receivable (2 ) — 16 45 59 Total derivatives - net basis $ 25 $ 3 $ (41 ) $ (25 ) $ (38 ) (1) PacifiCorp's commodity derivatives are generally included in rates and as of December 31, 2019 and 2018 , a regulatory asset of $62 million and $96 million , respectively, was recorded related to the net derivative liability of $63 million and $97 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): 2019 2018 2017 Beginning balance $ 96 $ 101 $ 73 Changes in fair value recognized in regulatory assets (37 ) 12 47 Net (losses) gains reclassified to operating revenue (34 ) (68 ) 9 Net gains (losses) reclassified to energy costs 37 51 (28 ) Ending balance $ 62 $ 96 $ 101
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 2019 2018 Electricity sales Megawatt hours (2 ) (6 ) Natural gas purchases Decatherms 129 117

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	12 Months Ended
	Dec. 31, 2019
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 2019 2018 2017 2019 2018 2017 Beginning balance $ 99 $ 94 $ 60 $ 10 $ 9 $ 6 Changes included in earnings 10 1 23 479 181 147 Changes in fair value recognized in OCI (1 ) 2 (3 ) — — — Changes in fair value recognized in net regulatory assets (26 ) 3 (1 ) — — — Purchases 6 3 1 — — 4 Settlements 9 (4 ) 14 (475 ) (180 ) (148 ) Ending balance $ 97 $ 99 $ 94 $ 14 $ 10 $ 9
Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]	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, 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 As of December 31, 2018: Cash equivalents $ 3 $ 59 $ — $ 62 Debt securities: United Kingdom government obligations 891 — — 891 Equity securities: Investment funds (2) — 697 — 697 Real estate funds — — 239 239 Total $ 894 $ 756 $ 239 1,889 Investment funds (2) measured at net asset value 100 Total assets measured at fair value $ 1,989 (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 38% and 62% , respectively, for 2019 and 36% and 64% , respectively, for 2018 . 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, 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 As of December 31, 2018: Cash equivalents $ 8 $ 41 $ 49 Debt securities: United States government obligations 160 — 160 International government obligations — 5 5 Corporate obligations — 373 373 Municipal obligations — 29 29 Agency, asset and mortgage-backed obligations — 123 123 Equity securities: United States companies 492 1 493 International companies 108 — 108 Investment funds (2) 119 — 119 Total assets in the fair value hierarchy $ 887 $ 572 1,459 Investment funds (2) measured at net asset value 792 Limited partnership interests (3) measured at net asset value 104 Real estate funds measured at net asset value 41 Total assets measured at fair value $ 2,396 (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 62% and 38% , respectively, for 2019 and 59% and 41% , respectively, for 2018 . Additionally, these funds are invested in United States and international securities of approximately 66% and 34% , respectively, for 2019 and 73% and 27% , respectively, for 2018 . (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, 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 236 — 236 Total assets in the fair value hierarchy $ 433 $ 135 568 Investment funds measured at net asset value 169 Limited partnership interests measured at net asset value 5 Total assets measured at fair value $ 742 As of December 31, 2018: Cash equivalents $ 10 $ 2 $ 12 Debt securities: United States government obligations 13 — 13 Corporate obligations — 42 42 Municipal obligations — 45 45 Agency, asset and mortgage-backed obligations — 30 30 Equity securities: United States companies 158 — 158 International companies 6 — 6 Investment funds (2) 202 1 203 Total assets in the fair value hierarchy $ 389 $ 120 509 Investment funds (2) measured at net asset value 149 Limited partnership interests (3) measured at net asset value 6 Total assets measured at fair value $ 664 (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 58% and 42% , respectively, for 2019 and 65% and 35% , respectively, for 2018 . Additionally, these funds are invested in United States and international securities of approximately 75% and 25% , respectively, for 2019 and 79% and 21% , respectively, for 2018 . (3) Limited partnership interests include several funds that invest primarily in real estate, buyout, growth equity and venture capital. 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, 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 ) As of December 31, 2018: Assets: Commodity derivatives $ 1 $ 91 $ 108 $ (52 ) $ 148 Interest rate derivatives 1 13 10 — 24 Mortgage loans held for sale — 468 — — 468 Money market mutual funds (2) 409 — — — 409 Debt securities: United States government obligations 187 — — — 187 International government obligations — 4 — — 4 Corporate obligations — 46 — — 46 Municipal obligations — 2 — — 2 Agency, asset and mortgage-backed obligations — 1 — — 1 Equity securities: United States companies 256 — — — 256 International companies 1,441 — — — 1,441 Investment funds 128 — — — 128 $ 2,423 $ 625 $ 118 $ (52 ) $ 3,114 Liabilities: Commodity derivatives $ (1 ) $ (180 ) $ (9 ) $ 111 $ (79 ) Interest rate derivatives — (32 ) — — (32 ) $ (1 ) $ (212 ) $ (9 ) $ 111 $ (111 ) (1) Represents netting under master netting arrangements and a net cash collateral receivable of $79 million and $59 million as of December 31, 2019 and 2018 , 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): 2019 2018 Carrying Fair Carrying Fair Value Value Value Value Long-term debt $ 39,353 $ 46,004 $ 36,774 $ 39,398
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, 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 As of December 31, 2018: Cash equivalents $ — $ 11 $ — $ 11 Debt securities: United States government obligations 4 — — 4 International government obligations 1 1 Corporate obligations — 88 — 88 Municipal obligations — 10 — 10 Agency, asset and mortgage-backed obligations — 43 — 43 Equity securities: United States companies 327 — — 327 International companies 15 — — 15 Investment funds (2) 54 — — 54 Total assets in the fair value hierarchy $ 400 $ 153 $ — 553 Investment funds (2) measured at net asset value 285 Limited partnership interests (3) measured at net asset value 104 Investments at fair value $ 942 (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 55% and 45% respectively, for both 2019 and 2018 , and are invested in United States and international securities of approximately 51% and 49% , respectively, for 2019 and 68% and 32% , respectively, for 2018 . (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 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, 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 As of December 31, 2018: Cash and cash equivalents $ 4 $ 1 $ — $ 5 Debt securities: United States government obligations 3 — — 3 Corporate obligations — 23 — 23 Municipal obligations — 2 — 2 Agency, asset and mortgage-backed obligations — 17 — 17 Equity securities: United States companies 83 — — 83 International companies 4 — — 4 Investment funds (2) 38 — — 38 Total assets in the fair value hierarchy 132 43 — 175 Investment funds (2) measured at net asset value 116 Limited partnership interests (3) measured at net asset value 6 Investments at fair value $ 297 (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 56% and 44% , respectively, for 2019 and 59% and 41% , respectively, for 2018 , and are invested in United States and international securities of approximately 79% and 21% , respectively, for 2019 and 90% and 10% , respectively, for 2018 . (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, 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 ) As of December 31, 2018: Assets: Commodity derivatives $ — $ 51 $ — $ (23 ) $ 28 Money market mutual funds (2) 69 — — — 69 Investment funds 24 — — — 24 $ 93 $ 51 $ — $ (23 ) $ 121 Liabilities - Commodity derivatives $ — $ (148 ) $ — $ 82 $ (66 ) (1) Represents netting under master netting arrangements and a net cash collateral receivable of $47 million and $59 million as of December 31, 2019 and 2018 , 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): 2019 2018 Carrying Fair Carrying Fair Value Value Value Value Long-term debt $ 7,658 $ 9,280 $ 7,015 $ 7,833
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, 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 As of December 31, 2018: Cash equivalents $ — $ 20 $ — $ 20 Debt securities: United States government obligations 6 — — 6 Corporate obligations — 63 — 63 Municipal obligations — 6 — 6 Agency, asset and mortgage-backed obligations — 37 — 37 Equity securities: United States companies 111 — — 111 International companies 35 — — 35 Investment funds (2) 65 — — 65 Total assets in the hierarchy $ 217 $ 126 $ — 343 Investment funds (2) measured at net asset value 260 Real estate funds measured at net asset value 41 Total assets measured at fair value $ 644 (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 69% and 31% , respectively, for 2019 and 65% and 35% , respectively, for 2018 . Additionally, these funds are invested in United States and international securities of approximately 74% and 26% , respectively, for 2019 and 74% and 26% , respectively, for 2018 . 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, 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 As of December 31, 2018: Cash equivalents $ 5 $ — $ — $ 5 Debt securities: United States government obligations 6 — — 6 Corporate obligations — 12 — 12 Municipal obligations — 43 — 43 Agency, asset and mortgage-backed obligations — 12 — 12 Equity securities: United States companies 73 — — 73 Investment funds (2) 96 — — 96 Total assets measured at fair value $ 180 $ 67 $ — $ 247 (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 77% and 23% , respectively, for 2019 and 78% and 22% , respectively, for 2018 . Additionally, these funds are invested in United States and international securities of approximately 42% and 58% , respectively, for 2019 and 41% and 59% , respectively, for 2018 . 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, 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 ) As of December 31, 2018 Assets: Commodity derivatives $ — $ 4 $ 2 $ (3 ) $ 3 Money market mutual funds (2) 2 — — — 2 Debt securities: United States government obligations 187 — — — 187 International government obligations — 4 — — 4 Corporate obligations — 46 — — 46 Municipal obligations — 2 — — 2 Agency, asset and mortgage-backed obligations — 1 — — 1 Equity securities: United States companies 256 — — — 256 International companies 6 — — — 6 Investment funds 10 — — — 10 $ 461 $ 57 $ 2 $ (3 ) $ 517 Liabilities: Commodity derivatives $ — $ (4 ) $ (2 ) $ 3 $ (3 ) Interest rate derivatives (3) $ — $ (19 ) $ — $ — $ (19 ) $ — $ (23 ) $ (2 ) $ 3 $ (22 ) (1) Represents netting under master netting arrangements and a net cash collateral receivable of $1 million and $- million as of December 31, 2019 and 2018 , 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. (3) The interest rate derivatives were interest rate locks related to MidAmerican Energy's January 2019 issuance of first mortgage bonds.
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): 2019 2018 Carrying Value Fair Value Carrying Value Fair Value Long-term debt $ 7,208 $ 8,283 $ 5,379 $ 5,644
MidAmerican Funding, LLC and Subsidiaries [Domain]
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): 2019 2018 Carrying Value Fair Value Carrying Value Fair Value Long-term debt $ 7,448 $ 8,599 $ 5,619 $ 5,941
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, 2019: Assets: Commodity derivatives $ — $ — $ — $ — Money market mutual funds (1) 10 — — 10 Investment funds 2 — — 2 $ 12 $ — $ — $ 12 Liabilities - commodity derivatives $ — $ — $ (8 ) $ (8 ) As of December 31, 2018: Assets: Commodity derivatives $ — $ — $ 7 $ 7 Money market mutual funds (1) 104 — — 104 Investment funds 1 — — 1 $ 105 $ — $ 7 $ 112 Liabilities - commodity derivatives $ — $ — $ (4 ) $ (4 ) (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): 2019 2018 2017 Beginning balance $ 3 $ (3 ) $ (14 ) Changes in fair value recognized in regulatory assets or liabilities (21 ) 4 (3 ) Settlements 10 2 14 Ending balance $ (8 ) $ 3 $ (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): 2019 2018 Carrying Fair Carrying Fair Value Value Value Value Long-term debt $ 2,351 $ 2,848 $ 2,353 $ 2,651
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, 2019: Assets - money market mutual funds (1) $ 25 $ — $ — $ 25 Liabilities - commodity derivatives $ — $ — $ (1 ) $ (1 ) As of December 31, 2018: Assets: Commodity derivatives $ — $ — $ 2 $ 2 Money market mutual funds (1) 45 — — 45 $ 45 $ — $ 2 $ 47 (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): 2019 2018 Carrying Fair Carrying Fair Value Value Value Value Long-term debt $ 1,135 $ 1,258 $ 1,120 $ 1,167

Other, Net (Tables)

Other, Net (Tables)	12 Months Ended
	Dec. 31, 2019
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): 2019 2018 2017 Non-service cost components of postretirement employee benefit plans $ 17 $ 21 $ 18 Corporate-owned life insurance income 24 6 13 Interest income and other, net 9 3 6 Total $ 50 $ 30 $ 37
MidAmerican Funding, LLC and Subsidiaries [Domain]
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): 2019 2018 2017 Non-service cost components of postretirement employee benefit plans $ 17 $ 21 $ 18 Corporate-owned life insurance income 24 6 13 Loss on debt tender offer — — (29 ) Interest income and other, net 11 4 7 Total $ 52 $ 31 $ 9 Refer to Note 8 for information regarding the debt tender offer.

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2019
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): 2019 2018 2017 Current: Federal $ (956 ) $ (686 ) $ (653 ) State (13 ) (9 ) (3 ) Foreign 81 104 83 (888 ) (591 ) (573 ) Deferred: Federal 431 165 (76 ) State (127 ) (131 ) 100 Foreign (8 ) (20 ) 2 296 14 26 Investment tax credits (6 ) (6 ) (7 ) Total $ (598 ) $ (583 ) $ (554 )
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: 2019 2018 2017 Federal statutory income tax rate 21 % 21 % 35 % Income tax credits (32 ) (30 ) (20 ) Effects of ratemaking (6 ) (8 ) (1 ) State income tax, net of federal income tax benefit (5 ) (6 ) 3 Effects of tax rate change and repatriation tax — (4 ) (31 ) Income tax effect of foreign income (2 ) (3 ) (5 ) Equity income — 1 (2 ) Other, net (1 ) (1 ) (1 ) Effective income tax rate (25 )% (30 )% (22 )%
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): 2019 2018 Deferred income tax assets: Regulatory liabilities $ 1,610 $ 1,674 Federal, state and foreign carryforwards 575 596 AROs 306 232 Other 590 527 Total deferred income tax assets 3,081 3,029 Valuation allowances (143 ) (137 ) Total deferred income tax assets, net 2,938 2,892 Deferred income tax liabilities: Property-related items (10,439 ) (10,185 ) Investments (1,137 ) (876 ) Regulatory assets (631 ) (656 ) Other (384 ) (222 ) Total deferred income tax liabilities (12,591 ) (11,939 ) Net deferred income tax liability $ (9,653 ) $ (9,047 )
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, 2019 (in millions): Federal State Foreign Total Net operating loss carryforwards (1) $ 292 $ 5,819 $ 523 $ 6,634 Deferred income taxes on net operating loss carryforwards 61 323 141 525 Expiration dates 2020 - indefinite 2020 - 2039 2035 - 2038 Tax credits $ 23 $ 27 $ — $ 50 Expiration dates 2023 - indefinite 2020 - 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 2020.
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): 2019 2018 Beginning balance $ 185 $ 181 Additions based on tax positions related to the current year 3 4 Additions for tax positions of prior years 13 38 Reductions for tax positions of prior years (37 ) (38 ) Statute of limitations (9 ) 2 Settlements (5 ) (2 ) Interest and penalties (5 ) — Ending balance $ 145 $ 185
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): 2019 2018 2017 Current: Federal $ 158 $ 164 $ 249 State 34 40 41 Total 192 204 290 Deferred: Federal (132 ) (187 ) 59 State 4 (9 ) 15 Total (128 ) (196 ) 74 Investment tax credits (3 ) (3 ) (4 ) Total income tax expense $ 61 $ 5 $ 360
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: 2019 2018 2017 Federal statutory income tax rate 21 % 21 % 35 % State income taxes, net of federal income tax benefit 3 4 3 Amortization of excess deferred income taxes (11 ) (17 ) — Effects of ratemaking (2 ) — 1 Federal income tax credits (3 ) (7 ) (5 ) Other (1 ) — (2 ) Effective income tax rate 7 % 1 % 32 %
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): 2019 2018 Deferred income tax assets: Regulatory liabilities $ 731 $ 752 Employee benefits 83 91 Derivative contracts and unamortized contract values 33 45 State carryforwards 70 77 Asset retirement obligations 61 53 Other 68 56 1,046 1,074 Deferred income tax liabilities: Property, plant and equipment (3,312 ) (3,335 ) Regulatory assets (276 ) (273 ) Other (21 ) (9 ) (3,609 ) (3,617 ) Net deferred income tax liability $ (2,563 ) $ (2,543 )
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, 2019 (in millions): State Net operating loss carryforwards $ 1,140 Deferred income taxes on net operating loss carryforwards $ 51 Expiration dates 2023 - 2032 Tax credit carryforwards $ 19 Expiration dates 2020 - 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 from continuing operations consists of the following for the years ended December 31 (in millions): 2019 2018 2017 Current: Federal $ (478 ) $ (276 ) $ (490 ) State (47 ) (12 ) (25 ) (525 ) (288 ) (515 ) Deferred: Federal 166 42 335 State (11 ) (8 ) (2 ) 155 34 333 Investment tax credits (1 ) (1 ) (1 ) Total $ (371 ) $ (255 ) $ (183 )
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 from continuing operations is as follows for the years ended December 31: 2019 2018 2017 Federal statutory income tax rate 21 % 21 % 35 % Income tax credits (90 ) (73 ) (68 ) State income tax, net of federal income tax benefit (11 ) (4 ) (4 ) Effects of ratemaking (8 ) (5 ) (7 ) Other, net — 1 1 Effective income tax rate (88 )% (60 )% (43 )%
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): 2019 2018 Deferred income tax assets: Regulatory liabilities $ 368 $ 405 Asset retirement obligations 234 164 Employee benefits 26 47 Other 71 80 Total deferred income tax assets 699 696 Deferred income tax liabilities: Depreciable property (3,253 ) (2,945 ) Regulatory assets (68 ) (61 ) Other (4 ) (12 ) Total deferred income tax liabilities (3,325 ) (3,018 ) Net deferred income tax liability $ (2,626 ) $ (2,322 )
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): 2019 2018 Beginning balance $ 10 $ 12 Additions based on tax positions related to the current year 5 4 Additions for tax positions of prior years 10 47 Reductions based on tax positions related to the current year (5 ) (4 ) Reductions for tax positions of prior years (12 ) (48 ) Interest and penalties — (1 ) Ending balance $ 8 $ 10
MidAmerican Funding, LLC and Subsidiaries [Domain]
Schedule of Effective Income Tax Rate Reconciliation [Line Items]
Components of Income Tax Expense (Benefit) [Table Text Block]	MidAmerican Funding's income tax benefit from continuing operations consists of the following for the years ended December 31 (in millions): 2019 2018 2017 Current: Federal $ (480 ) $ (280 ) $ (505 ) State (49 ) (14 ) (31 ) (529 ) (294 ) (536 ) Deferred: Federal 164 42 338 State (11 ) (9 ) (3 ) 153 33 335 Investment tax credits (1 ) (1 ) (1 ) Total $ (377 ) $ (262 ) $ (202 )
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 from continuing operations is as follows for the years ended December 31: 2019 2018 2017 Federal statutory income tax rate 21 % 21 % 35 % Income tax credits (94 ) (76 ) (77 ) State income tax, net of federal income tax benefit (12 ) (4 ) (6 ) Effects of ratemaking (8 ) (6 ) (8 ) Other, net — 1 2 Effective income tax rate (93 )% (64 )% (54 )%
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): 2019 2018 Deferred income tax assets: Regulatory liabilities $ 368 $ 405 Asset retirement obligations 234 164 Employee benefits 26 47 Other 76 85 Total deferred income tax assets 704 701 Deferred income tax liabilities: Depreciable property (3,253 ) (2,947 ) Regulatory assets (68 ) (62 ) Other (4 ) (11 ) Total deferred income tax liabilities (3,325 ) (3,020 ) Net deferred income tax liability $ (2,621 ) $ (2,319 )
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): 2019 2018 Beginning balance $ 10 $ 12 Additions based on tax positions related to the current year 5 4 Additions for tax positions of prior years 10 47 Reductions based on tax positions related to the current year (5 ) (4 ) Reductions for tax positions of prior years (12 ) (48 ) Interest and penalties — (1 ) Ending balance $ 8 $ 10
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): 2019 2018 2017 Current – Federal $ 105 $ 84 $ 62 Deferred – Federal (31 ) (13 ) 95 Uncertain tax positions — 2 — Investment tax credits (1 ) (1 ) (1 ) Total income tax expense $ 73 $ 72 $ 156
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 : 2019 2018 2017 Federal statutory income tax rate 21 % 21 % 35 % Non-deductible expenses — 3 — Effect of ratemaking — — 1 Effect of tax rate change — — 1 Other 1 — 1 Effective income tax rate 22 % 24 % 38 %
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): 2019 2018 Deferred income tax assets: Regulatory liabilities $ 211 $ 209 Operating and finance leases 99 97 Employee benefits 14 15 Customer advances 19 18 Other 9 9 Total deferred income tax assets 352 348 Deferred income tax liabilities: Property related items (797 ) (799 ) Regulatory assets (166 ) (196 ) Operating and finance leases (95 ) (94 ) Other (8 ) (8 ) Total deferred income tax liabilities (1,066 ) (1,097 ) Net deferred income tax liability $ (714 ) $ (749 )
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): 2019 2018 2017 Current – Federal $ 19 $ 23 $ — Deferred – Federal 10 7 56 Uncertain tax positions — 1 — Investment tax credits (1 ) (1 ) (1 ) Total income tax expense $ 28 $ 30 $ 55
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 : 2019 2018 2017 Federal statutory income tax rate 21 % 21 % 35 % Non-deductible expenses — 4 — Effect of tax rate change — — (1 ) Effective income tax rate 21 % 25 % 34 %
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): 2019 2018 Deferred income tax assets: Regulatory liabilities $ 70 $ 70 Employee benefit plans 6 10 Operating and finance leases 13 8 Customer Advances 9 8 Other 6 6 Total deferred income tax assets 104 102 Deferred income tax liabilities: Property related items (370 ) (346 ) Regulatory assets (62 ) (73 ) Operating and finance leases (13 ) (8 ) Other (6 ) (6 ) Total deferred income tax liabilities (451 ) (433 ) Net deferred income tax liability $ (347 ) $ (331 )

Supplemental Cash Flow Disclo_2

Supplemental Cash Flow Disclosures (Tables)	12 Months Ended
	Dec. 31, 2019
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): 2019 2018 2017 Supplemental disclosure of cash flow information: Interest paid, net of amounts capitalized $ 1,723 $ 1,713 $ 1,715 Income taxes received, net (1) $ 850 $ 780 $ 540 Supplemental disclosure of non-cash investing and financing transactions: Accruals related to property, plant and equipment additions $ 888 $ 823 $ 653 Common stock exchanged for junior subordinated debentures $ — $ — $ 100 (1) Includes $942 million , $884 million and $636 million of income taxes received from Berkshire Hathaway in 2019 , 2018 and 2017 , 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): 2019 2018 2017 Interest paid, net of amounts capitalized $ 340 $ 347 $ 350 Income taxes paid, net $ 171 $ 144 $ 340 Supplemental disclosure of non-cash investing and financing activities: Accounts payable related to property, plant and equipment additions $ 293 $ 184 $ 147
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, 2019 and 2018 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, 2019 2018 Cash and cash equivalents $ 287 $ — Restricted cash and cash equivalents in other current assets 43 56 Total cash and cash equivalents and restricted cash and cash equivalents $ 330 $ 56 The summary of supplemental cash flow disclosures as of and for the years ending December 31 is as follows (in millions): 2019 2018 2017 Supplemental cash flow information: Interest paid, net of amounts capitalized $ 224 $ 198 $ 193 Income taxes received, net $ 450 $ 494 $ 465 Supplemental disclosure of non-cash investing transactions: Accounts payable related to utility plant additions $ 337 $ 371 $ 224
MidAmerican Funding, LLC and Subsidiaries [Domain]
Condensed Cash Flow Statements, Captions [Line Items]
Schedule of Cash Flow, Supplemental Disclosures [Table Text Block]	The summary of supplemental cash flow information as of and for the years ending December 31 is as follows (in millions): 2019 2018 2017 Supplemental cash flow information: Interest paid, net of amounts capitalized $ 245 $ 218 $ 218 Income taxes received, net $ 456 $ 511 $ 472 Supplemental disclosure of non-cash investing and financing transactions: Accounts payable related to utility plant additions $ 337 $ 371 $ 224 Distribution of corporate aircraft to parent $ 8 $ — $ — A reconciliation of cash and cash equivalents and restricted cash and cash equivalents as of December 31, 2019 and 2018 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, 2019 2018 Cash and cash equivalents $ 288 $ 1 Restricted cash and cash equivalents in other current assets 43 56 Total cash and cash equivalents and restricted cash and cash equivalents $ 331 $ 57
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, 2019 and December 31, 2018 , 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, 2019 2018 Cash and cash equivalents $ 15 $ 111 Restricted cash and cash equivalents included in other current assets 10 10 Total cash and cash equivalents and restricted cash and cash equivalents $ 25 $ 121 The summary of supplemental cash flow disclosures as of and for the years ended December 31 is as follows (in millions): 2019 2018 2017 Supplemental disclosure of cash flow information: Interest paid, net of amounts capitalized $ 126 $ 166 $ 167 Income taxes paid $ 113 $ 117 $ 89 Supplemental disclosure of non-cash investing and financing transactions: Accruals related to property, plant and equipment additions $ 49 $ 34 $ 18
Sierra Pacific Power Company [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): 2019 2018 2017 Supplemental disclosure of cash flow information: Interest paid, net of amounts capitalized $ 41 $ 41 $ 40 Income taxes paid $ 37 $ 19 $ — Supplemental disclosure of non-cash investing and financing transactions: Accruals related to property, plant and equipment additions $ 18 $ 15 $ 10 A reconciliation of cash and cash equivalents and restricted cash and cash equivalents as of December 31, 2019 and December 31, 2018 , 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, 2019 2018 Cash and cash equivalents $ 27 $ 71 Restricted cash and cash equivalents included in other current assets 5 5 Total cash and cash equivalents and restricted cash and cash equivalents $ 32 $ 76

Employee Benefit Plans (Tables)

Employee Benefit Plans (Tables)	12 Months Ended
	Dec. 31, 2019
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 2019 2018 2017 2019 2018 2017 Service cost $ 16 $ 21 $ 24 $ 8 $ 9 $ 9 Interest cost 111 105 116 27 24 29 Expected return on plan assets (154 ) (164 ) (160 ) (40 ) (41 ) (40 ) Settlement — 21 — — — — Net amortization 31 28 25 (6 ) (13 ) (14 ) Net periodic benefit cost (credit) $ 4 $ 11 $ 5 $ (11 ) $ (21 ) $ (16 ) Net periodic benefit cost for the UK Plan included the following components for the years ended December 31 (in millions): 2019 2018 2017 Service cost $ 16 $ 19 $ 23 Interest cost 49 56 58 Expected return on plan assets (100 ) (101 ) (100 ) Settlement 26 44 31 Net amortization 46 45 63 Net periodic benefit cost $ 37 $ 63 $ 75
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 2019 2018 2019 2018 Plan assets at fair value, beginning of year $ 2,396 $ 2,761 $ 664 $ 736 Employer contributions 12 38 2 8 Participant contributions — — 9 8 Actual return on plan assets 456 (147 ) 122 (38 ) Settlement (22 ) (119 ) — — Benefits paid (186 ) (137 ) (55 ) (50 ) Plan assets at fair value, end of year $ 2,656 $ 2,396 $ 742 $ 664 The following table is a reconciliation of the fair value of plan assets for the years ended December 31 (in millions): 2019 2018 Plan assets at fair value, beginning of year $ 1,989 $ 2,368 Employer contributions 56 60 Participant contributions 1 1 Actual return on plan assets 194 (44 ) Settlement (99 ) (205 ) Benefits paid (71 ) (71 ) Foreign currency exchange rate changes 81 (120 ) Plan assets at fair value, end of year $ 2,151 $ 1,989
Changes in Projected Benefit Obligations [Table Text Block]	following table is a reconciliation of the benefit obligation for the years ended December 31 (in millions): 2019 2018 Benefit obligation, beginning of year $ 1,833 $ 2,201 Service cost 16 19 Interest cost 49 56 Participant contributions 1 1 Actuarial loss (gain) 175 (87 ) Settlement (99 ) (182 ) Amendment — 8 Benefits paid (71 ) (71 ) Foreign currency exchange rate changes 115 (112 ) Benefit obligation, end of year $ 2,019 $ 1,833 Accumulated benefit obligation, end of year $ 1,786 $ 1,637 The following table is a reconciliation of the benefit obligations for the years ended December 31 (in millions): Pension Other Postretirement 2019 2018 2019 2018 Benefit obligation, beginning of year $ 2,718 $ 3,006 $ 672 $ 721 Service cost 16 21 8 9 Interest cost 111 105 27 24 Participant contributions — — 9 8 Actuarial loss (gain) 242 (160 ) 12 (40 ) Amendment (1 ) 2 — — Settlement (22 ) (119 ) — — Benefits paid (186 ) (137 ) (55 ) (50 ) Benefit obligation, end of year $ 2,878 $ 2,718 $ 673 $ 672 Accumulated benefit obligation, end of year $ 2,867 $ 2,709
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 2019 2018 2019 2018 Plan assets at fair value, end of year $ 2,656 $ 2,396 $ 742 $ 664 Benefit obligation, end of year 2,878 2,718 673 672 Funded status $ (222 ) $ (322 ) $ 69 $ (8 ) Amounts recognized on the Consolidated Balance Sheets: Other assets $ 73 $ 20 $ 76 $ 5 Other current liabilities (13 ) (13 ) — — Other long-term liabilities (282 ) (329 ) (7 ) (13 ) Amounts recognized $ (222 ) $ (322 ) $ 69 $ (8 ) 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): 2019 2018 Plan assets at fair value, end of year $ 2,151 $ 1,989 Benefit obligation, end of year 2,019 1,833 Funded status $ 132 $ 156 Amounts recognized on the Consolidated Balance Sheets: Other assets $ 132 $ 156 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 2019 2018 2019 2018 Fair value of plan assets $ 1,939 $ 1,752 $ 439 $ 417 Projected benefit obligation $ 2,227 $ 2,091 $ 446 $ 429 Accumulated benefit obligation $ 2,222 $ 2,085
Net Periodic Benefit Costs Not Yet Recognized [Table Text Block]	A reconciliation of the amounts not yet recognized as components of net periodic benefit cost for the years ended December 31, 2019 and 2018 is as follows (in millions): Accumulated Other Regulatory Regulatory Comprehensive Asset Liability Loss Total Pension Balance, December 31, 2017 $ 665 $ (43 ) $ 20 $ 642 Net loss (gain) arising during the year 114 43 (6 ) 151 Net prior service cost arising during the year — — 2 2 Settlement (21 ) — — (21 ) Net amortization (28 ) — — (28 ) Total 65 43 (4 ) 104 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 Accumulated Other Regulatory Regulatory Comprehensive Asset Liability Loss Total Other Postretirement Balance, December 31, 2017 $ 10 $ (26 ) $ — $ (16 ) Net loss arising during the year 23 14 1 38 Net amortization 11 2 — 13 Total 34 16 1 51 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 ) 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): 2019 2018 Balance, beginning of year $ 480 $ 510 Net loss arising during the year 81 59 Net prior service cost arising during the year — 8 Settlement (26 ) (22 ) Net amortization (46 ) (45 ) Foreign currency exchange rate changes 60 (30 ) Total 69 (30 ) Balance, end of year $ 549 $ 480 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 2018 2019 2018 Net loss $ 653 $ 747 $ (23 ) $ 50 Prior service credit (2 ) — (14 ) (22 ) Regulatory deferrals 1 (1 ) 6 7 Total $ 652 $ 746 $ (31 ) $ 35 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): 2019 2018 Net loss $ 543 $ 472 Prior service cost 6 8 Total $ 549 $ 480
Defined Benefit Plans, Amounts To Be Recognized In Following Year [Table Text Block]
Plan Assumptions [Table Text Block]	Assumptions used to determine benefit obligations and net periodic benefit cost were as follows: 2019 2018 2017 Benefit obligations as of December 31: Discount rate 2.10 % 2.90 % 2.60 % Rate of compensation increase 3.30 % 3.55 % 3.45 % Rate of future price inflation 2.80 % 3.05 % 2.95 % Net periodic benefit cost for the years ended December 31: Discount rate 2.90 % 2.60 % 2.70 % Expected return on plan assets 5.10 % 4.90 % 5.00 % Rate of compensation increase 3.55 % 3.45 % 3.00 % Rate of future price inflation 3.05 % 2.95 % 3.00 % Weighted-average assumptions used to determine benefit obligations and net periodic benefit cost were as follows: Pension Other Postretirement 2019 2018 2017 2019 2018 2017 Benefit obligations as of December 31: Discount rate 3.32 % 4.25 % 3.60 % 3.24 % 4.21 % 3.57 % Rate of compensation increase 2.75 % 2.75 % 2.75 % NA NA NA Interest crediting rates for cash balance plan 2017 NA NA 2.49 % NA NA NA 2018 NA 3.38 % 3.06 % NA NA NA 2019 3.22 % 3.54 % 3.06 % NA NA NA 2020 2.94 % 3.54 % 2.72 % NA NA NA 2021 2.94 % 3.56 % 2.72 % NA NA NA 2022 3.02 % 3.56 % 2.72 % NA NA NA Net periodic benefit cost for the years ended December 31: Discount rate 4.25 % 3.60 % 4.06 % 4.21 % 3.57 % 4.01 % Expected return on plan assets 6.48 % 6.36 % 6.55 % 6.39 % 6.44 % 6.73 % Rate of compensation increase 2.75 % 2.75 % 2.75 % NA NA NA Interest crediting rate for cash balance plan 3.22 % 3.38 % 2.49 % 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. 2019 2018 Assumed healthcare cost trend rates as of December 31: Healthcare cost trend rate assumed for next year 6.50 % 6.80 % 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
Effect of One-Percentage-Point Change in Assumed Health Care Cost Trend Rates [Table Text Block]
Expected Benefit Payments [Table Text Block]	Employer contributions to the UK Plan are expected to be £43 million during 2020 . The expected benefit payments to participants in the UK Plan for 2020 through 2024 and for the five years thereafter excluding lump sum settlement elections, using the foreign currency exchange rate as of December 31, 2019 , are summarized below (in millions): 2020 $ 74 2021 75 2022 77 2023 79 2024 81 2025-2029 436 The expected benefit payments to participants in the Company's pension and other postretirement benefit plans for 2020 through 2024 and for the five years thereafter are summarized below (in millions): Projected Benefit Payments Other Pension Postretirement 2020 $ 233 $ 57 2021 218 56 2022 213 55 2023 212 54 2024 205 51 2025-2029 927 224
Allocation of Plan Assets [Table Text Block]	The target allocations (percentage of plan assets) for the UK Plan assets are as follows as of December 31, 2019 : % Debt securities (1) 50-55 Equity securities (1) 35-40 Real estate funds and other 5-15 (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. 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, 2019 : Other Pension Postretirement % % PacifiCorp: Debt securities (1) 30-43 33-37 Equity securities (1) 48-65 62-66 Limited partnership interests 6-12 1-3 MidAmerican Energy: Debt securities (1) 20-50 25-45 Equity securities (1) 60-80 45-80 Real estate funds 2-8 — Other 0-3 0-5 NV Energy: Debt securities (1) 53-77 40 Equity securities (1) 23-47 60 (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 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, 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 As of December 31, 2018: Cash equivalents $ 3 $ 59 $ — $ 62 Debt securities: United Kingdom government obligations 891 — — 891 Equity securities: Investment funds (2) — 697 — 697 Real estate funds — — 239 239 Total $ 894 $ 756 $ 239 1,889 Investment funds (2) measured at net asset value 100 Total assets measured at fair value $ 1,989 (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 38% and 62% , respectively, for 2019 and 36% and 64% , respectively, for 2018 . 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, 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 As of December 31, 2018: Cash equivalents $ 8 $ 41 $ 49 Debt securities: United States government obligations 160 — 160 International government obligations — 5 5 Corporate obligations — 373 373 Municipal obligations — 29 29 Agency, asset and mortgage-backed obligations — 123 123 Equity securities: United States companies 492 1 493 International companies 108 — 108 Investment funds (2) 119 — 119 Total assets in the fair value hierarchy $ 887 $ 572 1,459 Investment funds (2) measured at net asset value 792 Limited partnership interests (3) measured at net asset value 104 Real estate funds measured at net asset value 41 Total assets measured at fair value $ 2,396 (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 62% and 38% , respectively, for 2019 and 59% and 41% , respectively, for 2018 . Additionally, these funds are invested in United States and international securities of approximately 66% and 34% , respectively, for 2019 and 73% and 27% , respectively, for 2018 . (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, 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 236 — 236 Total assets in the fair value hierarchy $ 433 $ 135 568 Investment funds measured at net asset value 169 Limited partnership interests measured at net asset value 5 Total assets measured at fair value $ 742 As of December 31, 2018: Cash equivalents $ 10 $ 2 $ 12 Debt securities: United States government obligations 13 — 13 Corporate obligations — 42 42 Municipal obligations — 45 45 Agency, asset and mortgage-backed obligations — 30 30 Equity securities: United States companies 158 — 158 International companies 6 — 6 Investment funds (2) 202 1 203 Total assets in the fair value hierarchy $ 389 $ 120 509 Investment funds (2) measured at net asset value 149 Limited partnership interests (3) measured at net asset value 6 Total assets measured at fair value $ 664 (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 58% and 42% , respectively, for 2019 and 65% and 35% , respectively, for 2018 . Additionally, these funds are invested in United States and international securities of approximately 75% and 25% , respectively, for 2019 and 79% and 21% , respectively, for 2018 . (3) Limited partnership interests include several funds that invest primarily in real estate, buyout, growth equity and venture capital. 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, 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 ) As of December 31, 2018: Assets: Commodity derivatives $ 1 $ 91 $ 108 $ (52 ) $ 148 Interest rate derivatives 1 13 10 — 24 Mortgage loans held for sale — 468 — — 468 Money market mutual funds (2) 409 — — — 409 Debt securities: United States government obligations 187 — — — 187 International government obligations — 4 — — 4 Corporate obligations — 46 — — 46 Municipal obligations — 2 — — 2 Agency, asset and mortgage-backed obligations — 1 — — 1 Equity securities: United States companies 256 — — — 256 International companies 1,441 — — — 1,441 Investment funds 128 — — — 128 $ 2,423 $ 625 $ 118 $ (52 ) $ 3,114 Liabilities: Commodity derivatives $ (1 ) $ (180 ) $ (9 ) $ 111 $ (79 ) Interest rate derivatives — (32 ) — — (32 ) $ (1 ) $ (212 ) $ (9 ) $ 111 $ (111 ) (1) Represents netting under master netting arrangements and a net cash collateral receivable of $79 million and $59 million as of December 31, 2019 and 2018 , 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 2019 2018 2017 Beginning balance $ 239 $ 230 $ 105 Actual return on plan assets still held at period end (5 ) 23 6 Purchases — — 104 Foreign currency exchange rate changes 9 (14 ) 15 Ending balance $ 243 $ 239 $ 230
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 2019 2018 2017 2019 2018 2017 Service cost $ — $ — $ — $ 2 $ 2 $ 2 Interest cost 44 43 49 12 11 14 Expected return on plan assets (67 ) (72 ) (72 ) (21 ) (21 ) (21 ) Settlement — 22 — — — — Net amortization 11 13 14 — (6 ) (6 ) Net periodic benefit (credit) cost $ (12 ) $ 6 $ (9 ) $ (7 ) $ (14 ) $ (11 )
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 2019 2018 2019 2018 Plan assets at fair value, beginning of year $ 942 $ 1,111 $ 297 $ 332 Employer contributions 4 4 1 1 Participant contributions — — 5 5 Actual return on plan assets 181 (52 ) 55 (16 ) Settlement — (52 ) — — Benefits paid (91 ) (69 ) (24 ) (25 ) Plan assets at fair value, end of year $ 1,036 $ 942 $ 334 $ 297
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 2019 2018 2019 2018 Benefit obligation, beginning of year $ 1,105 $ 1,251 $ 298 $ 331 Service cost — — 2 2 Interest cost 44 43 12 11 Participant contributions — — 5 5 Actuarial loss (gain) 109 (68 ) 11 (26 ) Settlement — (52 ) — — Benefits paid (91 ) (69 ) (24 ) (25 ) Benefit obligation, end of year $ 1,167 $ 1,105 $ 304 $ 298 Accumulated benefit obligation, end of year $ 1,167 $ 1,105
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 2019 2018 2019 2018 Plan assets at fair value, end of year $ 1,036 $ 942 $ 334 $ 297 Less - Benefit obligation, end of year 1,167 1,105 304 298 Funded status $ (131 ) $ (163 ) $ 30 $ (1 ) Amounts recognized on the Consolidated Balance Sheets: Other assets $ 7 $ 3 $ 30 $ — Other current liabilities (4 ) (4 ) — — Other long-term liabilities (134 ) (162 ) — (1 ) Amounts recognized $ (131 ) $ (163 ) $ 30 $ (1 )
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 2018 2019 2018 Net loss (gain) $ 442 $ 461 $ (26 ) $ (2 ) Regulatory deferrals 1 (1 ) 6 7 Total $ 443 $ 460 $ (20 ) $ 5 A reconciliation of the amounts not yet recognized as components of net periodic benefit cost for the years ended December 31, 2019 and 2018 is as follows (in millions): Accumulated Other Regulatory Comprehensive Asset Loss Total Pension Balance, December 31, 2017 $ 418 $ 20 $ 438 Net loss (gain) arising during the year 59 (2 ) 57 Net amortization (12 ) (1 ) (13 ) Settlement (22 ) — (22 ) Total 25 (3 ) 22 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 Regulatory Asset (Liability) Other Postretirement Balance, December 31, 2017 $ (11 ) Net loss arising during the year 10 Net amortization 6 Total 16 Balance, December 31, 2018 5 Net gain arising during the year (25 ) Net amortization — Total (25 ) Balance, December 31, 2019 $ (20 )
Defined Benefit Plans, Amounts To Be Recognized In Following Year [Table Text Block]
Plan Assumptions [Table Text Block]	ssumptions used to determine benefit obligations and net periodic benefit cost were as follows: Pension Other Postretirement 2019 2018 2017 2019 2018 2017 Benefit obligations as of December 31: Discount rate 3.25 % 4.25 % 3.60 % 3.20 % 4.25 % 3.60 % Rate of compensation increase N/A N/A N/A N/A N/A N/A Interest crediting rates for cash balance plan (1)(2)(3) 2.27 % 3.40 % 1.61 % N/A N/A N/A Net periodic benefit cost for the years ended December 31: Discount rate 4.25 % 3.60 % 4.05 % 4.25 % 3.60 % 4.05 % Expected return on plan assets 7.00 7.00 7.25 6.86 6.86 7.25 Rate of compensation increase N/A N/A N/A N/A N/A N/A (1) 2019 Cash Balance Interest Crediting Rate assumption is 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. (2) 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. (3) 2017 Cash Balance Interest Crediting Rate assumption was 2.26% for 2018-2019 and 1.60% for 2020+ for nonunion participants and 2.78% for 2018-2019 and 2.60% for 2020+ for union participants. In establishing its assumption as to the expected return on plan assets, PacifiCorp utilizes the asset allocation and return assumptions for each asset class based on historical performance and forward-looking views of the financial markets. As a result of a plan amendment effective on January 1, 2017, the benefit obligation for the Retirement Plan is no longer affected by future increases in compensation. As a result of a labor settlement reached with UMWA in December 2014, the benefit obligation for the other postretirement plan is no longer affected by healthcare cost trends.
Expected Benefit Payments [Table Text Block]	The expected benefit payments to participants in PacifiCorp's pension and other postretirement benefit plans for 2020 through 2024 and for the five years thereafter are summarized below (in millions): Projected Benefit Payments Pension Other Postretirement 2020 $ 112 $ 27 2021 98 24 2022 94 23 2023 89 23 2024 83 21 2025-2029 350 94
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, 2019 : Pension (1) Other Postretirement (1) % % Debt securities (2) 30 - 43 33 - 37 Equity securities (2) 48 - 65 62 - 66 Limited partnership interests 6 - 12 1 - 3 (1) PacifiCorp's Retirement Plan trust 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, 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 As of December 31, 2018: Cash equivalents $ — $ 11 $ — $ 11 Debt securities: United States government obligations 4 — — 4 International government obligations 1 1 Corporate obligations — 88 — 88 Municipal obligations — 10 — 10 Agency, asset and mortgage-backed obligations — 43 — 43 Equity securities: United States companies 327 — — 327 International companies 15 — — 15 Investment funds (2) 54 — — 54 Total assets in the fair value hierarchy $ 400 $ 153 $ — 553 Investment funds (2) measured at net asset value 285 Limited partnership interests (3) measured at net asset value 104 Investments at fair value $ 942 (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 55% and 45% respectively, for both 2019 and 2018 , and are invested in United States and international securities of approximately 51% and 49% , respectively, for 2019 and 68% and 32% , respectively, for 2018 . (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 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, 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 As of December 31, 2018: Cash and cash equivalents $ 4 $ 1 $ — $ 5 Debt securities: United States government obligations 3 — — 3 Corporate obligations — 23 — 23 Municipal obligations — 2 — 2 Agency, asset and mortgage-backed obligations — 17 — 17 Equity securities: United States companies 83 — — 83 International companies 4 — — 4 Investment funds (2) 38 — — 38 Total assets in the fair value hierarchy 132 43 — 175 Investment funds (2) measured at net asset value 116 Limited partnership interests (3) measured at net asset value 6 Investments at fair value $ 297 (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 56% and 44% , respectively, for 2019 and 59% and 41% , respectively, for 2018 , and are invested in United States and international securities of approximately 79% and 21% , respectively, for 2019 and 90% and 10% , respectively, for 2018 . (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, 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 ) As of December 31, 2018: Assets: Commodity derivatives $ — $ 51 $ — $ (23 ) $ 28 Money market mutual funds (2) 69 — — — 69 Investment funds 24 — — — 24 $ 93 $ 51 $ — $ (23 ) $ 121 Liabilities - Commodity derivatives $ — $ (148 ) $ — $ 82 $ (66 ) (1) Represents netting under master netting arrangements and a net cash collateral receivable of $47 million and $59 million as of December 31, 2019 and 2018 , 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 2019 2018 2017 Funding improvement plan Surcharge imposed under PPA (1) 2019 2018 2017 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 $ 7 $ 7 $ 7 2017, 2016, 2015 (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, 2017, 2016 and 2015. Information for the plan year beginning July 1, 2018 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 2019 2018 2017 2019 2018 2017 Service cost $ 6 $ 9 $ 9 $ 5 $ 5 $ 5 Interest cost 30 28 31 10 8 9 Expected return on plan assets (41 ) (44 ) (44 ) (13 ) (13 ) (14 ) Settlement — (1 ) — — — — Net amortization 1 2 2 (3 ) (4 ) (4 ) Net periodic benefit (credit) cost $ (4 ) $ (6 ) $ (2 ) $ (1 ) $ (4 ) $ (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 2019 2018 2019 2018 Plan assets at fair value, beginning of year $ 644 $ 745 $ 247 $ 277 Employer contributions 7 7 1 1 Participant contributions — — 2 1 Actual return on plan assets 123 (39 ) 42 (17 ) Settlement — (37 ) — — Benefits paid (57 ) (32 ) (20 ) (15 ) Plan assets at fair value, end of year $ 717 $ 644 $ 272 $ 247
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 2019 2018 2019 2018 Benefit obligation, beginning of year $ 736 $ 799 $ 242 $ 246 Service cost 6 9 5 5 Interest cost 30 28 10 8 Participant contributions — — 2 1 Actuarial (gain) loss 48 (33 ) (13 ) (3 ) Plan amendments — 2 — — Settlement — (37 ) — — Benefits paid (57 ) (32 ) (20 ) (15 ) Benefit obligation, end of year $ 763 $ 736 $ 226 $ 242 Accumulated benefit obligation, end of year $ 758 $ 733
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 2019 2018 2019 2018 Plan assets at fair value, end of year $ 717 $ 644 $ 272 $ 247 Less - Benefit obligation, end of year 763 736 226 242 Funded status $ (46 ) $ (92 ) $ 46 $ 5 Amounts recognized on the Balance Sheets: Other assets $ 66 $ 17 $ 46 $ 5 Other current liabilities (7 ) (7 ) — — Other liabilities (105 ) (102 ) — — Amounts recognized $ (46 ) $ (92 ) $ 46 $ 5
Net Periodic Benefit Costs Not Yet Recognized [Table Text Block]	A reconciliation of the amounts not yet recognized as components of net periodic benefit cost for the years ended December 31, 2019 and 2018 is as follows (in millions): Regulatory Asset Regulatory Liability Receivables (Payables) with Affiliates Total Pension Balance, December 31, 2017 $ 24 $ (41 ) $ 7 $ (10 ) Net loss arising during the year 2 41 9 52 Net amortization (2 ) — — (2 ) Settlement 1 — — 1 Total 1 41 9 51 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 Regulatory Asset Receivables (Payables) with Affiliates Total Other Postretirement Balance, December 31, 2017 $ 14 $ (16 ) $ (2 ) Net loss arising during the year 20 6 26 Net amortization 3 1 4 Total 23 7 30 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 ) 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 2018 2019 2018 Net loss (gain) $ 6 $ 40 $ 4 $ 48 Prior service cost (credit) (1 ) 1 (14 ) (20 ) Total $ 5 $ 41 $ (10 ) $ 28
Plan Assumptions [Table Text Block]	Assumptions used to determine benefit obligations and net periodic benefit cost were as follows: Pension Other Postretirement 2019 2018 2017 2019 2018 2017 Benefit obligations as of December 31: Discount rate 3.40 % 4.25 % 3.60 % 3.20 % 4.15 % 3.50 % Rate of compensation increase 2.75 % 2.75 % 2.75 % N/A N/A N/A Interest crediting rates for cash balance plan 2017 N/A N/A 1.44 % N/A N/A N/A 2018 N/A 2.26 % 2.26 % N/A N/A N/A 2019 3.40 % 3.40 % 2.26 % N/A N/A N/A 2020 2.27 % 3.40 % 1.60 % N/A N/A N/A 2021 2.27 % 3.40 % 1.60 % N/A N/A N/A 2022 and beyond 2.27 % 3.40 % 1.60 % N/A N/A N/A Net periodic benefit cost for the years ended December 31: Discount rate 4.25 % 3.60 % 4.10 % 4.15 % 3.50 % 3.90 % Expected return on plan assets (1) 6.50 % 6.50 % 6.75 % 6.25 % 6.25 % 6.50 % Rate of compensation increase 2.75 % 2.75 % 2.75 % N/A N/A N/A Interest crediting rates for cash balance plan 3.40 % 2.26 % 1.44 % N/A N/A N/A (1) Amounts reflected are pre-tax values. Assumed after-tax returns for a taxable, non-union other postretirement plan were 4.62% for 2019 , 4.13% for 2018 , and 4.81% for 2017 . 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. 2019 2018 Assumed healthcare cost trend rates as of December 31: Healthcare cost trend rate assumed for next year 6.50 % 6.80 % 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 2020 through 2024 and for the five years thereafter are summarized below (in millions): Projected Benefit Payments Pension Other Postretirement 2020 $ 64 $ 20 2021 63 22 2022 61 22 2023 58 21 2024 56 20 2025-2029 244 84
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, 2019 : Pension Other Postretirement % % Debt securities (1) 20-50 25-45 Equity securities (1) 60-80 45-80 Real estate funds 2-8 — Other 0-3 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, 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 As of December 31, 2018: Cash equivalents $ — $ 20 $ — $ 20 Debt securities: United States government obligations 6 — — 6 Corporate obligations — 63 — 63 Municipal obligations — 6 — 6 Agency, asset and mortgage-backed obligations — 37 — 37 Equity securities: United States companies 111 — — 111 International companies 35 — — 35 Investment funds (2) 65 — — 65 Total assets in the hierarchy $ 217 $ 126 $ — 343 Investment funds (2) measured at net asset value 260 Real estate funds measured at net asset value 41 Total assets measured at fair value $ 644 (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 69% and 31% , respectively, for 2019 and 65% and 35% , respectively, for 2018 . Additionally, these funds are invested in United States and international securities of approximately 74% and 26% , respectively, for 2019 and 74% and 26% , respectively, for 2018 . 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, 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 As of December 31, 2018: Cash equivalents $ 5 $ — $ — $ 5 Debt securities: United States government obligations 6 — — 6 Corporate obligations — 12 — 12 Municipal obligations — 43 — 43 Agency, asset and mortgage-backed obligations — 12 — 12 Equity securities: United States companies 73 — — 73 Investment funds (2) 96 — — 96 Total assets measured at fair value $ 180 $ 67 $ — $ 247 (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 77% and 23% , respectively, for 2019 and 78% and 22% , respectively, for 2018 . Additionally, these funds are invested in United States and international securities of approximately 42% and 58% , respectively, for 2019 and 41% and 59% , respectively, for 2018 . 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, 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 ) As of December 31, 2018 Assets: Commodity derivatives $ — $ 4 $ 2 $ (3 ) $ 3 Money market mutual funds (2) 2 — — — 2 Debt securities: United States government obligations 187 — — — 187 International government obligations — 4 — — 4 Corporate obligations — 46 — — 46 Municipal obligations — 2 — — 2 Agency, asset and mortgage-backed obligations — 1 — — 1 Equity securities: United States companies 256 — — — 256 International companies 6 — — — 6 Investment funds 10 — — — 10 $ 461 $ 57 $ 2 $ (3 ) $ 517 Liabilities: Commodity derivatives $ — $ (4 ) $ (2 ) $ 3 $ (3 ) Interest rate derivatives (3) $ — $ (19 ) $ — $ — $ (19 ) $ — $ (23 ) $ (2 ) $ 3 $ (22 ) (1) Represents netting under master netting arrangements and a net cash collateral receivable of $1 million and $- million as of December 31, 2019 and 2018 , 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. (3) The interest rate derivatives were interest rate locks related to MidAmerican Energy's January 2019 issuance of first mortgage bonds.
MidAmerican Funding, LLC and Subsidiaries [Domain]
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): 2019 2018 2017 Pension costs $ 4 $ 3 $ 4 Other postretirement costs (2 ) (2 ) (3 )

Retirement Plan and Postretir_2

Retirement Plan and Postretirement Benefits Retirement Plan and Postretirement Benefits (Tables)	12 Months Ended
	Dec. 31, 2019
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 payable to NV Energy are included on the Consolidated Balance Sheets and consist of the following as of December 31 (in millions): 2019 2018 Qualified Pension Plan - Other long-term liabilities $ 18 $ 26 Non-Qualified Pension Plans: Other current liabilities 1 1 Other long-term liabilities 9 9 Other Postretirement Plans - Other long-term liabilities 2 1
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 payable to NV Energy are included on the Balance Sheets and consist of the following as of December 31 (in millions): 2019 2018 Qualified Pension Plan - Other long-term liabilities $ 4 $ 19 Non-Qualified Pension Plans: Other current liabilities 1 1 Other long-term liabilities 8 7 Other Postretirement Plans - Other long-term liabilities 7 13

Asset Retirement Oblilgations (

Asset Retirement Oblilgations (Tables)	12 Months Ended
	Dec. 31, 2019
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): 2019 2018 Fossil fuel facilities $ 623 $ 371 Quad Cities Station 358 345 Wind generating facilities 211 174 Offshore pipeline facilities 15 33 Solar generating facilities 21 20 Other 44 42 Total asset retirement obligations $ 1,272 $ 985 Quad Cities Station nuclear decommissioning trust funds $ 599 $ 504
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): 2019 2018 Beginning balance $ 985 $ 954 Change in estimated costs 257 10 Additions 43 28 Retirements (61 ) (45 ) Accretion 48 38 Ending balance $ 1,272 $ 985 Reflected as: Other current liabilities $ 167 $ 43 Other long-term liabilities 1,105 942 Total ARO liability $ 1,272 $ 985
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): 2019 2018 Beginning balance $ 227 $ 215 Change in estimated costs 27 9 Additions 9 — Retirements (15 ) (5 ) Accretion 9 8 Ending balance $ 257 $ 227 Reflected as: Other current liabilities $ 19 $ 21 Other long-term liabilities 238 206 $ 257 $ 227
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): 2019 2018 Quad Cities Station $ 358 $ 345 Fossil-fueled generating facilities 325 93 Wind-powered generating facilities 154 123 Other 2 1 Total asset retirement obligations $ 839 $ 562 Quad Cities Station nuclear decommissioning trust funds (1) $ 599 $ 504 (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): 2019 2018 Beginning balance $ 562 $ 559 Change in estimated costs 234 (10 ) Additions 27 17 Retirements (14 ) (28 ) Accretion 30 24 Ending balance $ 839 $ 562 Reflected as: Other current liabilities $ 135 $ 10 Asset retirement obligations 704 552 $ 839 $ 562
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): 2019 2018 Waste water remediation $ 37 $ 37 Evaporative ponds and dry ash landfills 12 12 Asbestos — 5 Solar 2 2 Other 23 27 Total asset retirement obligations $ 74 $ 83
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): 2019 2018 Beginning balance $ 83 $ 80 Change in estimated costs 6 11 Retirements (19 ) (11 ) Accretion 4 3 Ending balance $ 74 $ 83 Reflected as: Other current liabilities $ 14 $ 13 Other long-term liabilities 60 70 $ 74 $ 83
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): 2019 2018 Asbestos $ 5 $ 5 Evaporative ponds and dry ash landfills 2 2 Other 3 3 Total asset retirement obligations $ 10 $ 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): 2019 2018 Beginning balance $ 10 $ 10 Accretion — — Ending balance $ 10 $ 10 Reflected as - Other long-term liabilities $ 10 $ 10

Commitments and Contingencies_2

Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2019
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, 2019 are as follows (in millions): 2025 and 2020 2021 2022 2023 2024 Thereafter Total Contract type: Fuel, capacity and transmission contract commitments $ 2,218 $ 1,527 $ 1,193 $ 1,093 $ 1,088 $ 13,584 $ 20,703 Construction commitments 1,682 521 27 2 8 — 2,240 Easements 62 68 70 72 70 2,259 2,601 Maintenance, service and other contracts 669 342 324 300 255 1,624 3,514 $ 4,631 $ 2,458 $ 1,614 $ 1,467 $ 1,421 $ 17,467 $ 29,058
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, 2019 are as follows (in millions): 2020 2021 2022 2023 2024 2025 and Thereafter Total Contract type: Purchased electricity contracts - commercially operable $ 279 $ 177 $ 174 $ 168 $ 164 $ 1,810 $ 2,772 Purchased electricity contracts - non-commercially operable 7 52 52 53 53 987 1,204 Fuel contracts 832 519 316 245 248 775 2,935 Construction commitments 844 6 — — 4 — 854 Transmission 101 86 77 71 56 429 820 Easements 10 12 12 12 11 349 406 Maintenance, service and other contracts 329 49 41 34 32 204 689 Total commitments $ 2,402 $ 901 $ 672 $ 583 $ 568 $ 4,554 $ 9,680
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, 2019 , are as follows (in millions): 2025 and 2020 2021 2022 2023 2024 Thereafter Total Contract type: Coal and natural gas for generation $ 114 $ 52 $ 48 $ 39 $ — $ — $ 253 Electric capacity and transmission 28 24 14 8 7 29 110 Natural gas contracts for gas operations 102 61 47 24 8 23 265 Construction commitments 670 515 27 2 4 — 1,218 Easements 32 36 37 38 39 1,492 1,674 Maintenance, services and other 198 156 154 155 120 432 1,215 $ 1,144 $ 844 $ 327 $ 266 $ 178 $ 1,976 $ 4,735
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 , 2019 are as follows (in millions): 2020 2021 2022 2023 2024 2025 and Thereafter Total Contract type: Fuel, capacity and transmission contract commitments $ 539 $ 390 $ 319 $ 321 $ 324 $ 3,432 $ 5,325 Fuel and capacity contract commitments (not commercially operable) 1 6 41 92 157 4,677 4,974 Construction commitments 23 — — — — — 23 Easements 4 4 5 5 3 43 64 Maintenance, service and other contracts 51 48 43 34 25 18 219 Total commitments $ 618 $ 448 $ 408 $ 452 $ 509 $ 8,170 $ 10,605
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 , 2019 are as follows (in millions): 2025 and 2020 2021 2022 2023 2024 Thereafter Total Contract type: Fuel, capacity and transmission contract commitments $ 260 $ 198 $ 114 $ 84 $ 83 $ 863 $ 1,602 Fuel and capacity contract commitments (not commercially operable) 1 11 41 41 42 921 1,057 Easements 2 2 2 2 2 30 40 Maintenance, service and other contracts 11 8 7 2 1 9 38 Total commitments $ 274 $ 219 $ 164 $ 129 $ 128 $ 1,823 $ 2,737

Components of Accumulated Oth_2

Components of Accumulated Other Comprehensive Loss, Net (Tables)	12 Months Ended
	Dec. 31, 2019
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, 2016 $ (447 ) $ (1,675 ) $ 585 $ 26 $ (1,511 ) Other comprehensive income (loss) 64 546 500 3 1,113 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 )

Noncontrolling Interests Noncon

Noncontrolling Interests Noncontrolling Interests (Tables)	12 Months Ended
	Dec. 31, 2019
MidAmerican Funding, LLC and Subsidiaries [Domain]
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): 2019 2018 2017 Non-service cost components of postretirement employee benefit plans $ 17 $ 21 $ 18 Corporate-owned life insurance income 24 6 13 Loss on debt tender offer — — (29 ) Interest income and other, net 11 4 7 Total $ 52 $ 31 $ 9 Refer to Note 8 for information regarding the debt tender offer.

Segment Information (Tables)

Segment Information (Tables)	12 Months Ended
	Dec. 31, 2019
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, 2019 2018 2017 Operating revenue: PacifiCorp $ 5,068 $ 5,026 $ 5,237 MidAmerican Funding 2,927 3,053 2,846 NV Energy 3,037 3,039 3,015 Northern Powergrid 1,013 1,020 949 BHE Pipeline Group 1,131 1,203 993 BHE Transmission 707 710 699 BHE Renewables 932 908 838 HomeServices 4,473 4,214 3,443 BHE and Other (1) 556 614 594 Total operating revenue $ 19,844 $ 19,787 $ 18,614 Depreciation and amortization: PacifiCorp $ 954 $ 979 $ 796 MidAmerican Funding 638 609 500 NV Energy 482 456 422 Northern Powergrid 254 250 214 BHE Pipeline Group 115 126 159 BHE Transmission 240 247 239 BHE Renewables 282 268 251 HomeServices 47 51 66 BHE and Other (1) (1 ) (2 ) (1 ) Total depreciation and amortization $ 3,011 $ 2,984 $ 2,646 Operating income: PacifiCorp $ 1,072 $ 1,051 $ 1,440 MidAmerican Funding 549 550 544 NV Energy 655 607 766 Northern Powergrid 472 486 488 BHE Pipeline Group 572 525 473 BHE Transmission 323 313 322 BHE Renewables 336 325 316 HomeServices 222 214 214 BHE and Other (1) (51 ) 1 (41 ) Total operating income 4,150 4,072 4,522 Interest expense (1,912 ) (1,838 ) (1,841 ) Capitalized interest 77 61 45 Allowance for equity funds 173 104 76 Interest and dividend income 117 113 111 (Losses) gains on marketable securities, net (288 ) (538 ) 14 Other, net 97 (9 ) (420 ) Total income before income tax (benefit) expense and equity income (loss) $ 2,414 $ 1,965 $ 2,507 Years Ended December 31, 2019 2018 2017 Interest expense: PacifiCorp $ 401 $ 384 $ 381 MidAmerican Funding 302 247 237 NV Energy 229 224 233 Northern Powergrid 139 141 133 BHE Pipeline Group 52 43 43 BHE Transmission 157 167 169 BHE Renewables 174 201 204 HomeServices 25 23 7 BHE and Other (1) 433 408 434 Total interest expense $ 1,912 $ 1,838 $ 1,841 Income tax (benefit) expense: PacifiCorp $ 61 $ 5 $ 362 MidAmerican Funding (377 ) (262 ) (202 ) NV Energy 98 100 221 Northern Powergrid 59 61 57 BHE Pipeline Group 138 119 170 BHE Transmission 11 7 (124 ) BHE Renewables (2) (325 ) (158 ) (795 ) HomeServices 51 52 49 BHE and Other (1) (314 ) (507 ) (292 ) Total income tax (benefit) expense $ (598 ) $ (583 ) $ (554 ) Capital expenditures: PacifiCorp $ 2,175 $ 1,257 $ 769 MidAmerican Funding 2,810 2,332 1,776 NV Energy 657 503 456 Northern Powergrid 602 566 579 BHE Pipeline Group 687 427 286 BHE Transmission 247 270 334 BHE Renewables 122 817 323 HomeServices 54 47 37 BHE and Other 10 22 11 Total capital expenditures $ 7,364 $ 6,241 $ 4,571 As of December 31, 2019 2018 2017 Property, plant and equipment, net: PacifiCorp $ 20,973 $ 19,570 $ 19,183 MidAmerican Funding 18,377 16,169 14,221 NV Energy 9,613 9,367 9,276 Northern Powergrid 6,606 6,007 6,075 BHE Pipeline Group 5,482 4,904 4,587 BHE Transmission 6,157 5,824 6,330 BHE Renewables 5,976 6,155 5,637 HomeServices 161 141 117 BHE and Other (40 ) (50 ) (69 ) Total property, plant and equipment, net $ 73,305 $ 68,087 $ 65,357 Total assets: PacifiCorp $ 24,861 $ 23,478 $ 23,086 MidAmerican Funding 22,664 20,029 18,444 NV Energy 14,128 14,119 13,903 Northern Powergrid 8,385 7,427 7,565 BHE Pipeline Group 6,100 5,511 5,134 BHE Transmission 8,776 8,424 9,009 BHE Renewables 9,961 8,666 7,687 HomeServices 3,846 2,797 2,722 BHE and Other 1,330 1,738 2,658 Total assets $ 100,051 $ 92,189 $ 90,208 Years Ended December 31, 2019 2018 2017 Operating revenue by country: United States $ 18,108 $ 18,014 $ 16,916 United Kingdom 1,011 1,017 948 Canada 706 710 699 Philippines and other 19 46 51 Total operating revenue by country $ 19,844 $ 19,787 $ 18,614 Income before income tax (benefit) expense and equity income (loss) by country: United States $ 1,866 $ 1,425 $ 1,927 United Kingdom 326 307 313 Canada 178 155 167 Philippines and other 44 78 100 Total income before income tax (benefit) expense and equity (loss) income by country: $ 2,414 $ 1,965 $ 2,507 As of December 31, 2019 2018 2017 Property, plant and equipment, net by country: United States $ 60,634 $ 56,362 $ 53,065 United Kingdom 6,504 5,895 5,953 Canada 6,157 5,817 6,323 Philippines and other 10 13 16 Total property, plant and equipment, net by country $ 73,305 $ 68,087 $ 65,357 (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 (benefit) expense 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, 2019 and 2018 (in millions): BHE BHE MidAmerican NV Northern Pipeline BHE BHE Home- and PacifiCorp Funding Energy Powergrid Group Transmission Renewables Services Other Total December 31, 2017 $ 1,129 $ 2,102 $ 2,369 $ 991 $ 73 $ 1,571 $ 95 $ 1,348 $ — $ 9,678 Acquisitions — — — — — — — 79 — 79 Foreign currency translation — — — (39 ) — (123 ) — — — (162 ) 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
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, 2019 2018 2017 Operating revenue: Regulated electric $ 2,237 $ 2,283 $ 2,108 Regulated natural gas 660 754 719 Other 28 12 10 Total operating revenue $ 2,925 $ 3,049 $ 2,837 Depreciation and amortization: Regulated electric $ 593 $ 565 $ 458 Regulated natural gas 46 44 42 Total depreciation and amortization $ 639 $ 609 $ 500 Operating income: Regulated electric $ 473 $ 469 $ 472 Regulated natural gas 71 81 72 Other 4 1 (1 ) Total operating income $ 548 $ 551 $ 543 Interest expense: Regulated electric $ 259 $ 208 $ 196 Regulated natural gas 22 19 18 Total interest expense $ 281 $ 227 $ 214 Years Ended December 31, 2019 2018 2017 Income tax (benefit) expense: Regulated electric $ (384 ) $ (273 ) $ (212 ) Regulated natural gas 12 16 29 Other 1 2 — Total income tax (benefit) expense $ (371 ) $ (255 ) $ (183 ) Net income: Regulated electric $ 739 $ 628 $ 570 Regulated natural gas 52 54 35 Other 2 — — Net income $ 793 $ 682 $ 605 Capital expenditures: Regulated electric $ 2,684 $ 2,223 $ 1,686 Regulated natural gas 126 109 87 Total capital expenditures $ 2,810 $ 2,332 $ 1,773 As of December 31, 2019 2018 2017 Total assets: Regulated electric $ 19,093 $ 16,511 $ 14,914 Regulated natural gas 1,468 1,406 1,403 Other 3 3 1 Total assets $ 20,564 $ 17,920 $ 16,318
MidAmerican Funding, LLC and Subsidiaries [Domain]
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, 2019 2018 2017 Operating revenue: Regulated electric $ 2,237 $ 2,283 $ 2,108 Regulated natural gas 660 754 719 Other 30 16 19 Total operating revenue $ 2,927 $ 3,053 $ 2,846 Depreciation and amortization: Regulated electric $ 593 $ 565 $ 458 Regulated natural gas 46 44 42 Total depreciation and amortization $ 639 $ 609 $ 500 Operating income: Regulated electric $ 473 $ 469 $ 472 Regulated natural gas 71 81 72 Other 5 — — Total operating income $ 549 $ 550 $ 544 Interest expense: Regulated electric $ 259 $ 208 $ 196 Regulated natural gas 22 19 18 Other 21 20 23 Total interest expense $ 302 $ 247 $ 237 Income tax (benefit) expense: Regulated electric $ (384 ) $ (273 ) $ (212 ) Regulated natural gas 12 16 29 Other (5 ) (5 ) (19 ) Total income tax (benefit) expense $ (377 ) $ (262 ) $ (202 ) Net income: Regulated electric $ 739 $ 628 $ 570 Regulated natural gas 52 54 35 Other (10 ) (13 ) (31 ) Net income $ 781 $ 669 $ 574 Years Ended December 31, 2019 2018 2017 Capital expenditures: Regulated electric $ 2,684 $ 2,223 $ 1,686 Regulated natural gas 126 109 87 Total capital expenditures $ 2,810 $ 2,332 $ 1,773 As of December 31, 2019 2018 2017 Total assets: Regulated electric $ 20,284 $ 17,702 $ 16,105 Regulated natural gas 1,547 1,485 1,482 Other 9 15 34 Total assets $ 21,840 $ 19,202 $ 17,621
Schedule of Goodwill [Table Text Block]	Goodwill by reportable segment as of December 31, 2019 and 2018 , 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, 2019 2018 2017 Operating revenue: Regulated electric $ 770 $ 752 $ 713 Regulated natural gas 119 103 99 Total operating revenue $ 889 $ 855 $ 812 Operating income: Regulated electric $ 150 $ 136 $ 175 Regulated natural gas 21 16 22 Total operating income 171 152 197 Interest expense (48 ) (44 ) (43 ) Allowance for borrowed funds 1 1 2 Allowance for equity funds 3 4 3 Other, net 4 9 5 Income before income tax expense $ 131 $ 122 $ 164 As of December 31, 2019 2018 2017 Assets Regulated electric $ 3,319 $ 3,177 $ 3,103 Regulated natural gas 308 314 300 Regulated common assets (1) 44 78 10 Total assets $ 3,671 $ 3,569 $ 3,413 (1) Consists principally of cash and cash equivalents not included in either the regulated electric or regulated natural gas segments.

Unaudited Quarterly Operating_2

Unaudited Quarterly Operating Results Unaudited Quarterly Operating Results (Tables)	12 Months Ended
	Dec. 31, 2019
Nevada Power Company [Member]
Quarterly Operating Results [Line Items]
Schedule of Quarterly Financial Information [Table Text Block]	Three-Month Periods Ended March 31, June 30, September 30, December 31, 2019 2019 2019 2019 Operating revenues $ 395 $ 527 $ 806 $ 420 Operating income 45 123 244 67 Net income 6 69 165 24 Three-Month Periods Ended March 31, June 30, September 30, December 31, 2018 2018 2018 2018 Operating revenues $ 395 $ 562 $ 820 $ 407 Operating income 40 122 247 37 Net income — 64 164 (2 )
Sierra Pacific Power Company [Member]
Quarterly Operating Results [Line Items]
Schedule of Quarterly Financial Information [Table Text Block]	Three-Month Periods Ended March 31, June 30, September 30, December 31, 2019 2019 2019 2019 Regulated electric operating revenue $ 182 $ 172 $ 232 $ 184 Regulated natural gas operating revenue 37 22 16 44 Operating income 37 27 67 40 Net income 22 14 44 23 Three-Month Periods Ended March 31, June 30, September 30, December 31, 2018 2018 2018 2018 Regulated electric operating revenue $ 181 $ 169 $ 225 $ 177 Regulated natural gas operating revenue 41 19 14 29 Operating income 47 19 56 30 Net income 34 7 35 16

Revenue from Contract with Cu_2

Revenue from Contract with Customer Revenue from Contract with Customer (Tables)	12 Months Ended
	Dec. 31, 2019
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 customer class and 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, 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 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, 2019 , by reportable segment (in millions): Performance obligations expected to be satisfied Less than 12 months More than 12 months Total BHE Pipeline Group $ 871 $ 5,136 $ 6,007
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, 2019 2018 Customer Revenue: Brokerage $ 4,028 $ 3,882 Franchise 68 67 Total Customer Revenue 4,096 3,949 Other revenue 377 265 Total $ 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): 2019 2018 Customer Revenue: Retail: Residential $ 1,783 $ 1,737 Commercial 1,522 1,513 Industrial 1,176 1,172 Other retail 230 234 Total retail 4,711 4,656 Wholesale 99 55 Transmission 98 103 Other Customer Revenue 78 76 Total Customer Revenue 4,986 4,890 Other revenue 82 136 Total operating revenue $ 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, 2019 2018 Electric Natural Gas Other Total Electric Natural Gas Other Total Customer Revenue: Retail: Residential $ 672 $ 383 $ — $ 1,055 $ 696 $ 421 $ — $ 1,117 Commercial 322 132 — 454 314 153 — 467 Industrial 799 17 — 816 758 22 — 780 Natural gas transportation services — 38 — 38 — 39 — 39 Other retail 145 — — 145 147 1 — 148 Total retail 1,938 570 — 2,508 1,915 636 — 2,551 Wholesale 221 88 — 309 295 116 — 411 Multi-value transmission projects 57 — — 57 55 — — 55 Other Customer Revenue — — 28 28 — — 11 11 Total Customer Revenue 2,216 658 28 2,902 2,265 752 11 3,028 Other revenue 21 2 — 23 18 2 1 21 Total operating revenue $ 2,237 $ 660 $ 28 $ 2,925 $ 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 by customer class for the years ended December 31 (in millions): 2019 2018 Customer Revenue: Retail: Residential $ 1,141 $ 1,195 Commercial 441 433 Industrial 433 425 Other 20 24 Total fully bundled 2,035 2,077 Distribution only service 31 30 Total retail 2,066 2,107 Wholesale, transmission and other 57 53 Total Customer Revenue 2,123 2,160 Other revenue 25 24 Total revenue $ 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 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): 2019 2018 Electric Natural Gas Total Electric Natural Gas Total Customer Revenue: Retail: Residential $ 268 $ 76 $ 344 $ 267 $ 67 $ 334 Commercial 245 30 275 246 25 271 Industrial 186 10 196 177 8 185 Other 6 1 7 6 1 7 Total fully bundled 705 117 822 696 101 797 Distribution only service 4 — 4 4 — 4 Total retail 709 117 826 700 101 801 Wholesale, transmission and other 57 — 57 48 — 48 Total Customer Revenue 766 117 883 748 101 849 Other revenue 4 2 6 4 2 6 Total revenue $ 770 $ 119 $ 889 $ 752 $ 103 $ 855

Organization and Operations (De

Organization and Operations (Details)	12 Months Ended
	Dec. 31, 2019OperatingSegmentsOwnedAndOperatedCompanies
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	2
Number of owned and operated electricity transmission companies in Canada	1
Number of owned and operated renewable energy businesses	1
Number of owned and operated residential real estate brokerage firms in the United States	1
Number of owned and operated real estate franchise networks in the United States	1

Summary of Significant Accoun_4

Summary of Significant Accounting Policies - Allowance for Doubtful Accounts (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Allowance for Doubtful Accounts [Line Items]
Allowance for doubtful accounts	$ 44	$ 42

Summary of Significant Accoun_5

Summary of Significant Accounting Policies - Inventory (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Summary of Significant Accounting Policies - Inventory [Abstract]
Energy Related Inventory, Other Fossil Fuel	$ 257	$ 273
Inventory, Raw Materials and Supplies, Gross	616	571
Replacement cost of inventory	$ 2	$ 14

Summary of Significant Accoun_6

Summary of Significant Accounting Policies - Revenue Recognition (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Significant Accounting Policies - Revenue Recognition [Abstract]
Unbilled revenue	$ 638	$ 554

Summary of Significant Accoun_7

Summary of Significant Accounting Policies New Accounting Pronouncements (Details) - BHE	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Federal statutory income tax rate	21.00%	21.00%	35.00%
Tax Cuts and Jobs Act of 2017 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Federal statutory income tax rate	21.00%	21.00%

Summary of SIgnificant Accoun_8

Summary of SIgnificant Accounting Policies - PacifiCorp - Investments (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
PacifiCorp [Member]
Unrealized gains and losses on available-for-sale securities	$ 0	$ 0

Summary of Significant Accoun_9

Summary of Significant Accounting Policies - PacifiCorp - Allowance for Doubtful Accounts (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Allowance for Doubtful Accounts [Line Items]
Accounts Receivable, Allowance for Credit Loss, Current	$ 44	$ 42
PacifiCorp [Member]
Allowance for Doubtful Accounts [Line Items]
Accounts Receivable, Allowance for Credit Loss, Current	$ 8

Summary of Significant Accou_10

Summary of Significant Accounting Policies - PacifiCorp - Revenue Recognition (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
PacifiCorp [Member]
Unbilled Contracts Receivable	$ 245	$ 229

Summary of Significant Accou_11

Summary of Significant Accounting Policies - PacifiCorp - Income Taxes (Details) - USD ($) $ in Millions		12 Months Ended
		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%	35.00%
Total regulatory assets		$ 2,881	$ 3,067
Regulatory Liabilities		7,311	7,506
Deferred Income Tax Charge [Member]
Deferred Tax Assets and Liabilities [Line Items]
Total regulatory assets	[1]	223	196
Deferred Income Tax Charge [Member]
Deferred Tax Assets and Liabilities [Line Items]
Regulatory Liabilities	[2]	$ 3,611	$ 3,923
PacifiCorp [Member]
Deferred Tax Assets and Liabilities [Line Items]
Federal statutory income tax rate		21.00%	21.00%	35.00%
Total regulatory assets		$ 1,123	$ 1,112
Regulatory Liabilities		2,969	3,055
Deferred investment tax credit		11	13
PacifiCorp [Member] | Deferred Income Tax Charge [Member]
Deferred Tax Assets and Liabilities [Line Items]
Regulatory Liabilities	[3]	$ 1,653	$ 1,803
Tax Cuts and Jobs Act of 2017 [Member]
Deferred Tax Assets and Liabilities [Line Items]
Federal statutory income tax rate		21.00%	21.00%
Tax Cuts and Jobs Act of 2017 [Member] | Deferred Income Tax Charge [Member]
Deferred Tax Assets and Liabilities [Line Items]
Regulatory Liabilities	[4]	$ 5,950
[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]	(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. See Note 12 for further discussion of 2017 Tax Reform impacts.
[3]	(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.
[4]	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.

Summary of Significant Accou_12

Summary of Significant Accounting Policies - MEC - Allowance for Doubtful Accounts (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Accounts Receivable, Allowance for Credit Loss, Current	$ 44	$ 42
MidAmerican Energy Company [Member]
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Accounts Receivable, Allowance for Credit Loss, Current	$ 5	$ 7

Summary of Significant Accou_13

Summary of Significant Accounting Policies - MEC - Inventory (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Inventory [Line Items]
Inventory, Raw Materials and Supplies, Gross	$ 616	$ 571
Replacement cost of inventory	2	14
MidAmerican Energy Company [Member]
Inventory [Line Items]
Inventory, Raw Materials and Supplies, Gross	128	124
Public utility inventory, coal	66	51
Public utility inventory - natural gas in storage	28	24
Replacement cost under stated LIFO value	$ (2)
Replacement cost of inventory		$ 14

Summary of Significant Accou_14

Summary of Significant Accounting Policies - MEC - Revenue Recognition (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Unbilled revenue	$ 638	$ 554
MidAmerican Energy Company [Member]
Unbilled revenue	91	88
Adjustment clause accounts receivable (payable)	$ 56	$ 56

Summary of Significant Accou_15

Summary of Significant Accounting Policies Summary of Significant Accounting Policies - MEC - New Accounting Pronouncements (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Accounts Receivable, Allowance for Credit Loss, Current	$ 44	$ 42
MidAmerican Energy Company [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Accounts Receivable, Allowance for Credit Loss, Current	5	7
Energy Related Inventory, Gas Stored Underground	28	24
Adjustment clause accounts receivable (payable)	$ 56	$ 56

Summary of Significant Accou_16

Summary of Significant Accounting Policies - MidAmerican Funding - Goodwill (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
MidAmerican Funding, LLC and Subsidiaries [Domain]
Goodwill [Line Items]
Goodwill impairment	$ 0	$ 0	$ 0

Summary of Significant Accou_17

Summary of Significant Accounting Policies - NPC - Allowance for Doubtful Accounts (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Allowance for Doubtful Accounts [Line Items]
Allowance for doubtful accounts	$ 44	$ 42
Nevada Power Company [Member]
Allowance for Doubtful Accounts [Line Items]
Allowance for doubtful accounts	$ 15	$ 16

Summary of Significant Accou_18

Summary of Significant Accounting Policies - NPC - Inventory (Details) $ in Millions	12 Months Ended
	Dec. 31, 2019USD ($)OperatingSegmentsTheNumberOfReportableSegments	Dec. 31, 2018USD ($)
Inventory [Line Items]
Number of Reportable Segments | OperatingSegments	8
Inventory, Raw Materials and Supplies, Gross	$ 616	$ 571
Energy Related Inventory, Other Fossil Fuel	$ 257	273
Nevada Power Company [Member]
Inventory [Line Items]
Number of Reportable Segments | TheNumberOfReportableSegments	1
Inventory, Raw Materials and Supplies, Gross	$ 62	56
Energy Related Inventory, Other Fossil Fuel	$ 0	$ 5

Summary of Significant Accou_19

Summary of Significant Accounting Policies Summary of Significant Accounting Policies - NPC - Property, Plant and Equipment, Net (Details)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Nevada Power Company [Member]
Property, Plant and Equipment [Line Items]
Public Utilities, Allowance for Funds Used During Construction, Rate	7.83%	7.95%

Summary of Significant Accou_20

Summary of Significant Accounting Policies - NPC - Revenue Recognition (Details) - Nevada Power Company [Member] - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Unbilled Contracts Receivable	$ 109	$ 106
Contractual Assets	$ 9	$ 0

Summary of Significant Accou_21

Summary of Significant Accounting Policies Summary of Significant Accounting Policies - NPC - Segment Information (Details)	12 Months Ended
	Dec. 31, 2019OperatingSegmentsTheNumberOfReportableSegments
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_22

Summary of Significant Accounting Policies - SPPC - Allowance for Doubtful Accounts (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Allowance for Doubtful Accounts [Line Items]
Allowance for doubtful accounts	$ 44	$ 42
SEC Schedule, 12-09, Allowance, Credit Loss [Member] | Sierra Pacific Power Company [Member]
Allowance for Doubtful Accounts [Line Items]
Allowance for doubtful accounts	$ 2	$ 2

Summary of Significant Accou_23

Summary of Significant Accounting Policies - SPPC - Inventory (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Inventory [Line Items]
Inventory, Raw Materials and Supplies, Gross	$ 616	$ 571
Energy Related Inventory, Other Fossil Fuel	257	273
Sierra Pacific Power Company [Member]
Inventory [Line Items]
Inventory, Raw Materials and Supplies, Gross	49	44
Energy Related Inventory, Other Fossil Fuel	$ 8	$ 8

Summary of Significant Accou_24

Summary of Significant Accounting Policies - SPPC - Property, Plant and Equipment, Net (Details) - Sierra Pacific Power Company [Member]	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Electricity Generation Plant, Non-Nuclear [Member]
Property, Plant and Equipment [Line Items]
Public Utilities, Allowance for Funds Used During Construction, Rate	6.65%	6.65%
Natural Gas Processing Plant [Member]
Property, Plant and Equipment [Line Items]
Public Utilities, Allowance for Funds Used During Construction, Rate	5.75%	5.74%
Common Facilities [Member]
Property, Plant and Equipment [Line Items]
Public Utilities, Allowance for Funds Used During Construction, Rate	6.55%	6.55%

Summary of Significant Accou_25

Summary of Significant Accounting Policies - SPPC - Revenue Recognition (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Unbilled revenue	$ 638	$ 554
Sierra Pacific Power Company [Member]
Unbilled revenue	$ 63	$ 57

Business Acquisitions (Details)

Business Acquisitions (Details) - USD ($) $ in Millions	1 Months Ended	12 Months Ended
	Apr. 30, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Business Acquisition [Line Items]
Acquisition, net of cash acquired		$ (27)	$ (106)	$ (1,113)
Goodwill		9,722	9,595	9,678
Business acquisition, acquisition of remaining noncontrolling interest		0	131	$ 0
Other acquisitions [Member]
Business Acquisition [Line Items]
Acquisition, net of cash acquired		$ (100)	(1,100)
Total assets assumed			1,100
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities			487
Goodwill			$ 508
HomeServices [Member] | Real estate brokerage franchise business [Member]
Business Acquisition [Line Items]
Ownership Percentage Acquired	33.30%
Business acquisition, acquisition of remaining noncontrolling interest	$ 131

Property, Plant and Equipment_3

Property, Plant and Equipment, Net (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Property, Plant and Equipment [Line Items]
Property, plant and equipment, net	$ 73,305	$ 68,087	$ 65,357
Regulated Operation [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	89,292	84,231
Accumulated depreciation and amortization	(26,353)	(25,894)
Property, plant and equipment in service, net	62,939	58,337
Regulated Operation [Member] | Utility generation, distribution and transmission system [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 81,127	76,707
Regulated Operation [Member] | Utility generation, distribution and transmission system [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	5 years
Regulated Operation [Member] | Utility generation, distribution and transmission system [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	80 years
Regulated Operation [Member] | Interstate natural gas pipeline assets [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 8,165	7,524
Regulated Operation [Member] | Interstate natural gas pipeline assets [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	3 years
Regulated Operation [Member] | Interstate natural gas pipeline assets [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	80 years
Nonregulated Operation [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 8,817	8,250
Accumulated depreciation and amortization	(2,183)	(1,610)
Property, plant and equipment in service, net	6,634	6,640
Nonregulated Operation [Member] | Independent power plants [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	6,983	6,826
Nonregulated Operation [Member] | Other assets [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	1,834	1,424
Common Facilities [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment in service, net	69,573	64,977
Construction work-in-progress	3,732	3,110
Property, plant and equipment, net	$ 73,305	68,087
Nonregulated Operation [Member] | Independent power plants [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	5 years
Nonregulated Operation [Member] | Independent power plants [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	30 years
Nonregulated Operation [Member] | Other assets [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	3 years
Nonregulated Operation [Member] | Other assets [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	30 years
PacifiCorp [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, net	$ 20,973	19,570	19,183
MidAmerican Funding [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, net	$ 18,377	$ 16,169	$ 14,221

Property, Plant and Equipment_4

Property, Plant and Equipment, Net - PacifiCorp (Details) - PacifiCorp [Member] - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Property, Plant and Equipment [Line Items]
Electric Property Plant And Equipment In Service Gross		$ 28,763	$ 28,399
Public utility accumulated depreciation and amortization		(9,803)	(10,034)
Public Utilities, Property, Plant and Equipment, Net, Excluding Construction Work In Progress		18,970	18,375
Public Utilities, Property, Plant and Equipment, Construction Work in Progress		2,003	1,195
Public Utilities, Property, Plant and Equipment, Net		$ 20,973	$ 19,570
Public Utilities, Property, Plant and Equipment, Disclosure of Composite Depreciation Rate for Plants in Service		3.30%	3.50%	2.90%
Public Utilities, Property, Plant and Equipment, Amount of Acquisition Adjustments		$ 156
Public Utilities, Property, Plant and Equipment, Amount of Acquisition Adjustments, Related Accumulated Depreciation		$ 132	$ 127
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		$ 12,509	12,606
Electric Transmission [Member]
Property, Plant and Equipment [Line Items]
Electric Property Plant And Equipment In Service Gross		6,482	6,357
Electric Distribution [Member]
Property, Plant and Equipment [Line Items]
Electric Property Plant And Equipment In Service Gross		7,307	7,030
Other Intangible Assets [Member]
Property, Plant and Equipment [Line Items]
Electric Property Plant And Equipment In Service Gross	[1]	1,016	970
Other Capitalized Property Plant and Equipment [Member]
Property, Plant and Equipment [Line Items]
Electric Property Plant And Equipment In Service Gross		$ 1,449	1,436
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		$ 18,960	18,365
Nonregulated Operation [Member]
Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Net, Excluding Construction Work In Progress		$ 10	$ 10
[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 Property, Plant and Equipment - MEC (Details) - MidAmerican Energy Company [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Public Utility, Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Net, Excluding Construction Work In Progress	$ 17,593	$ 15,122
Public Utilities, Property, Plant and Equipment, Net	$ 18,375	$ 16,157
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	3.10%	2.90%	2.60%
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%	2.70%
Regulated Operation [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Plant in Service, Excluding Construction Work In Progress	$ 23,726	$ 21,057
Public Utilities, Property, Plant and Equipment, Accumulated Depreciation	(6,139)	(5,941)
Public Utilities, Property, Plant and Equipment, Net, Excluding Construction Work In Progress	17,587	15,116
Public Utilities, Property, Plant and Equipment, Construction Work in Progress	782	1,035
Regulated Operation [Member] | Electric Operations [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Generation or Processing	15,687	13,727
Public Utilities, Property, Plant and Equipment, Transmission	2,124	1,934
Public Utilities, Property, Plant and Equipment, Distribution	4,095	3,672
Regulated Operation [Member] | Natural Gas Processing Plant [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Distribution	1,820	1,724
Nonregulated Operation [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Accumulated Depreciation	(1)	(1)
Public Utilities, Property, Plant and Equipment, Net, Excluding Construction Work In Progress	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 Property, Plant and Equipment - LLC (Details) - Other Capitalized Property Plant and Equipment [Member] - MidAmerican Funding, LLC and Subsidiaries [Domain] - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 3	$ 24
Accumulated depreciation and amortization	$ 1	$ 12

Property, Plant and Equipment_7

Property, Plant and Equipment, Net - NPC (Details) - Nevada Power Company [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Net, Excluding Construction Work In Progress	$ 6,343	$ 6,321
Public Utilities, Property, Plant and Equipment, Construction Work in Progress	195	97
Public Utilities, Property, Plant and Equipment, Net	$ 6,538	$ 6,418
Public Utilities, Property, Plant and Equipment, Disclosure of Composite Depreciation Rate for Plants in Service	3.30%	3.20%	3.20%
Electricity Generation Plant, Non-Nuclear [Member]
Property, Plant and Equipment [Line Items]
Change in Accounting Estimates, Impact on Period of Change	$ 7
Regulated Operation [Member]
Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Generation or Processing	3,541	$ 3,720
Public Utilities, Property, Plant and Equipment, Distribution	3,567	3,411
Public Utilities, Property, Plant and Equipment, Transmission	1,444	1,439
Public Utilities, Property, Plant and Equipment, Other Property, Plant and Equipment	741	716
Public Utilities, Property, Plant and Equipment, Plant in Service, Excluding Construction Work In Progress	9,293	9,286
Public Utilities, Property, Plant and Equipment, Accumulated Depreciation	2,951	2,966
Public Utilities, Property, Plant and Equipment, Net, Excluding Construction Work In Progress	6,342	6,320
Nonregulated Operation [Member]
Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Net, Excluding Construction Work In Progress	$ 1	$ 1
Minimum [Member] | Regulated Operation [Member]
Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Generation, Useful Life	30 years	30 years
Public Utilities, Property, Plant and Equipment, Distribution, Useful Life	20 years	20 years
Public Utilities, Property, Plant and Equipment, Transmission, Useful Life	45 years	45 years
Public Utilities, Property, Plant and Equipment, Other Property Plant and Equipment, Useful Life	5 years	5 years
Minimum [Member] | Nonregulated Operation [Member]
Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Other Property Plant and Equipment, Useful Life	45 years	45 years
Maximum [Member] | Regulated Operation [Member]
Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Generation, Useful Life	55 years	55 years
Public Utilities, Property, Plant and Equipment, Distribution, Useful Life	65 years	65 years
Public Utilities, Property, Plant and Equipment, Transmission, Useful Life	70 years	70 years
Public Utilities, Property, Plant and Equipment, Other Property Plant and Equipment, Useful Life	65 years	65 years
Maximum [Member] | Nonregulated Operation [Member]
Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Other Property Plant and Equipment, Useful Life	45 years	45 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, 2019	Dec. 31, 2018	Dec. 31, 2017
Public Utility, Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Net, Excluding Construction Work In Progress	$ 2,962	$ 2,857
Public Utilities, Property, Plant and Equipment, Construction Work in Progress	113	90
Public Utilities, Property, Plant and Equipment, Net	$ 3,075	$ 2,947
Public Utilities, Property, Plant and Equipment, Disclosure of Composite Depreciation Rate for Plants in Service	3.10%	3.10%	3.00%
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	$ 1,133	$ 1,132
Public Utilities, Property, Plant and Equipment, Distribution	1,669	1,568
Public Utilities, Property, Plant and Equipment, Transmission	840	812
Public Utilities, Property, Plant and Equipment, Other Property, Plant and Equipment	$ 178	$ 185
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	25 years
Public Utilities, Property, Plant and Equipment, Distribution, Useful Life	20 years	20 years
Public Utilities, Property, Plant and Equipment, Transmission, Useful Life	50 years	50 years
Public Utilities, Property, Plant and Equipment, Other Property Plant and Equipment, Useful Life	5 years	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	60 years
Public Utilities, Property, Plant and Equipment, Distribution, Useful Life	100 years	100 years
Public Utilities, Property, Plant and Equipment, Transmission, Useful Life	100 years	100 years
Public Utilities, Property, Plant and Equipment, Other Property Plant and Equipment, Useful Life	70 years	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	$ 417	$ 403
Public Utilities, Property, Plant and Equipment, Other Property, Plant and Equipment	$ 14	$ 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	35 years
Public Utilities, Property, Plant and Equipment, Other Property Plant and Equipment, Useful Life	5 years	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	70 years
Public Utilities, Property, Plant and Equipment, Other Property Plant and Equipment, Useful Life	70 years	70 years
Regulated Operation [Member] | Common Facilities [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Common	$ 338	$ 321
Public Utilities, Property, Plant and Equipment, Plant in Service, Excluding Construction Work In Progress	4,589	4,435
Public Utilities, Property, Plant and Equipment, Accumulated Depreciation	(1,629)	(1,583)
Public Utilities, Property, Plant and Equipment, Net, Excluding Construction Work In Progress	$ 2,960	$ 2,852
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	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	70 years
Nonregulated Operation [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Net, Excluding Construction Work In Progress	$ 2	$ 5
Nonregulated Operation [Member] | Minimum [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Other Property Plant and Equipment, Useful Life	70 years	70 years
Nonregulated Operation [Member] | Maximum [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Other Property Plant and Equipment, Useful Life	70 years	70 years

Jointly Owned Utility Facilit_3

Jointly Owned Utility Facilities (Details) $ in Millions	12 Months Ended
	Dec. 31, 2019USD ($)
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	$ 9,871
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	4,653
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	4,467
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	2,032
Construction Work in Progress	$ 123
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	$ 1,476
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	677
Construction Work in Progress	$ 9
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	$ 484
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	193
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	121
Construction Work in Progress	$ 2
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	$ 473
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	243
Construction Work in Progress	$ 1
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	$ 254
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	137
Construction Work in Progress	$ 2
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	$ 181
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	92
Construction Work in Progress	$ 5
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	252
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	39
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	$ 43
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	23
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	$ 808
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	255
Construction Work in Progress	103
MidAmerican Energy Company [Member]
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	4,506
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	2,138
Construction Work in Progress	$ 49
MidAmerican Energy Company [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	$ 258
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	95
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	$ 834
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	458
Construction Work in Progress	$ 7
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	$ 729	[1]
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	424	[1]
Construction Work in Progress	$ 11	[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	$ 930
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	392
Construction Work in Progress	$ 5
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	$ 316	[2]
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	131	[2]
Construction Work in Progress	$ 1	[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	$ 316
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	171
Construction Work in Progress	$ 2
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	$ 634
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	229
Construction Work in Progress	$ 19
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	$ 489
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	238
Construction Work in Progress	4
NV Energy [Member]
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	632
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	326
Construction Work in Progress	$ 0
NV Energy [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	$ 70
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	29
Construction Work in Progress	$ 0
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	$ 13
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	2
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	271
Construction Work in Progress	$ 0
BHE Pipeline Group [Member] | BHE Pipeline Group - common facilities [Member]
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	$ 266
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	157
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 $458 million and $94 million, respectively.

Jointly Owned Utility Facilit_4

Jointly Owned Utility Facilities - PacifiCorp (Details) $ in Millions	12 Months Ended
	Dec. 31, 2019USD ($)
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	$ 9,871
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	4,653
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	4,467
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	2,032
Jointly Owned Utility Plant, Ownership Amount of Construction Work in Progress	$ 123
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	$ 1,476
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	677
Jointly Owned Utility Plant, Ownership Amount of Construction Work in Progress	$ 9
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	$ 484
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	193
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	121
Jointly Owned Utility Plant, Ownership Amount of Construction Work in Progress	$ 2
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	$ 473
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	243
Jointly Owned Utility Plant, Ownership Amount of Construction Work in Progress	$ 1
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	$ 254
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	137
Jointly Owned Utility Plant, Ownership Amount of Construction Work in Progress	$ 2
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	$ 181
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	92
Jointly Owned Utility Plant, Ownership Amount of Construction Work in Progress	$ 5
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	252
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	39
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	$ 43
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	23
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	$ 808
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	255
Jointly Owned Utility Plant, Ownership Amount of Construction Work in Progress	$ 103

Jointly Owned Utility Facilit_5

Jointly Owned Utility Facilities Jointly Owned Utility Facilities - MEC (Details) $ in Millions	12 Months Ended
	Dec. 31, 2019USD ($)
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	$ 9,871
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	4,653
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	4,506
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	2,138
Jointly Owned Utility Plant, Ownership Amount of Construction Work in Progress	$ 49
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	$ 834
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	458
Jointly Owned Utility Plant, Ownership Amount of Construction Work in Progress	$ 7
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	$ 729	[1]
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	424	[1]
Jointly Owned Utility Plant, Ownership Amount of Construction Work in Progress	$ 11	[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	$ 930
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	392
Jointly Owned Utility Plant, Ownership Amount of Construction Work in Progress	$ 5
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	$ 316	[2]
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	131	[2]
Jointly Owned Utility Plant, Ownership Amount of Construction Work in Progress	1	[2]
Revenue sharing credits netted against facility in service	458
Revenue sharing credits netted against accumulated depreciation	$ 94
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	$ 316
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	171
Jointly Owned Utility Plant, Ownership Amount of Construction Work in Progress	$ 2
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	$ 634
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	229
Jointly Owned Utility Plant, Ownership Amount of Construction Work in Progress	$ 19
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	$ 489
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	238
Jointly Owned Utility Plant, Ownership Amount of Construction Work in Progress	$ 4
MidAmerican Energy Company [Member] | Transmission 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	$ 258
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	95
Jointly Owned Utility Plant, Ownership Amount of Construction Work in Progress	$ 0
[1]	(1)Includes amounts related to nuclear fuel.
[2]	(2)Plant in service and accumulated depreciation and amortization amounts are net of credits applied under Iowa regulatory arrangements totaling $458 million and $94 million, respectively.

Jointly Owned Utility Facilit_6

Jointly Owned Utility Facilities - NPC (Details) $ in Millions	12 Months Ended
	Dec. 31, 2019USD ($)
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	$ 9,871
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	4,653
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	230
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	52
Jointly Owned Utility Plant, Ownership Amount of Construction Work in Progress	$ 0
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	$ 13	[1]
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	2	[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	24.00%
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	$ 151
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	23
Jointly Owned Utility Plant, Ownership Amount of Construction Work in Progress	$ 0
Nevada Power Company [Member] | Other Transmission Facilities [Member]
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	$ 66
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	27
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, 2019USD ($)
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	$ 9,871
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	4,653
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	402
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	274
Jointly Owned Utility Plant, Ownership Amount of Construction Work in Progress	$ 0
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	271
Jointly Owned Utility Plant, Ownership Amount of Construction Work in Progress	$ 0
Sierra Pacific Power Company [Member] | ON Line deferrals
Jointly Owned Utility Plant Interests [Line Items]
Jointly Owned Utility Plant, Proportionate Ownership Share	1.00%
Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service	$ 8
Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation	1
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

Leases Leases - Summary (Detail

Leases Leases - Summary (Details) $ in Millions	Dec. 31, 2019USD ($)
Leases [Abstract]
Operating Lease, Right-of-Use Asset	$ 525
Finance Lease, Right-of-Use Asset	504
Total Right-of-Use Asset	1,029
Operating Lease, Liability	577
Finance Lease, Liability	519
Total Lease Liabilities	$ 1,096

Leases Leases - Lease Costs (De

Leases Leases - Lease Costs (Details) $ in Millions	12 Months Ended
	Dec. 31, 2019USD ($)
Leases [Abstract]
Operating Lease, Weighted Average Remaining Lease Term	7 years 7 months 21 days
Variable Lease, Cost	$ 623
Operating Lease, Cost	170
Finance Lease, Right-of-Use Asset, Amortization	16
Finance Lease, Interest Expense	41
Short-term Lease, Cost	7
Lease, Cost	$ 857
Operating Lease, Weighted Average Discount Rate, Percent	5.20%
Finance Lease, Weighted Average Discount Rate, Percent	8.60%
Finance Lease, Weighted Average Remaining Lease Term	28 years 10 months 2 days

Leases Leases - Other (Details)

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

Leases Leases - Maturity Table

Leases Leases - Maturity Table (Details) - USD ($) $ in Millions		Dec. 31, 2019	Dec. 31, 2018
Leases [Abstract]
Operating Leases, Future Minimum Payments Due, Next Twelve Months	[1]		$ 147
Lessee, Operating Lease, Liability, Payments, Due Next Twelve Months		$ 147
Finance Lease, Liability, Payments, Due Next Twelve Months		71
Lease, Liability, Payments, Due Next Twelve Months		218	216	[1]
Lessee, Operating Lease, Liability, Payments, Due Year Two		126
Finance Lease, Liability, Payments, Due Year Two		77
Lease, Liability, Payments, Due Year Two		203	196	[1]
Lessee, Operating Lease, Liability, Payments, Due Year Three		102
Finance Lease, Liability, Payments, Due Year Three		70
Lease, Liability, Payments, Due Year Three		172	183	[1]
Lessee, Operating Lease, Liability, Payments, Due Year Four		73
Finance Lease, Liability, Payments, Due Year Four		59
Lease, Liability, Payments, Due Year Four		132	154	[1]
Lessee, Operating Lease, Liability, Payments, Due Year Five		50
Finance Lease, Liability, Payments, Due Year Five		59
Lease, Liability, Payments, Due Year Five		109	117	[1]
Lessee, Operating Lease, Liability, Payments, Due after Year Five		202
Finance Lease, Liability, Payments, Due after Year Five		725
Lease, Liability, Payments, Due after Year Five		927	931	[1]
Lessee, Operating Lease, Liability, Payments, Due		700
Finance Lease, Liability, Payment, Due		1,061
Lease, Liability, Payments, Due		1,761	1,797	[1]
Lessee, Operating Lease, Liability, Undiscounted Excess Amount		(123)
Finance Lease, Liability, Undiscounted Excess Amount		(542)
Lease, Liability, Undiscounted Excess Amount		(665)
Operating Lease, Liability		577
Finance Lease, Liability		519
Total Lease Liabilities		$ 1,096
Capital Leases, Future Minimum Payments Due, Next Twelve Months	[1]		69
Operating Leases, Future Minimum Payments, Due in Two Years	[1]		128
Capital Leases, Future Minimum Payments Due in Two Years	[1]		68
Operating Leases, Future Minimum Payments, Due in Three Years	[1]		110
Capital Leases, Future Minimum Payments Due in Three Years	[1]		73
Operating Leases, Future Minimum Payments, Due in Four Years	[1]		87
Capital Leases, Future Minimum Payments Due in Four Years	[1]		67
Operating Leases, Future Minimum Payments, Due in Five Years	[1]		61
Capital Leases, Future Minimum Payments Due in Five Years	[1]		56
Operating Leases, Future Minimum Payments, Due Thereafter	[1]		159
Capital Leases, Future Minimum Payments Due Thereafter	[1]		772
Operating Leases, Future Minimum Payments Due	[1]		692
Capital Leases, Future Minimum Payments Due	[1]		$ 1,105
[1]	Amounts included for comparability and accounted for in accordance with ASC Topic 840, "Leases".

Leases Leases - PAC - Summary (

Leases Leases - PAC - Summary (Details) $ in Millions	Dec. 31, 2019USD ($)
Lessee, Lease, Description [Line Items]
Operating Lease, Right-of-Use Asset	$ 525
Finance Lease, Right-of-Use Asset	504
Total Right-of-Use Asset	1,029
Operating Lease, Liability	577
Finance Lease, Liability	519
Total Lease Liabilities	1,096
PacifiCorp [Member]
Lessee, Lease, Description [Line Items]
Operating Lease, Right-of-Use Asset	12
Finance Lease, Right-of-Use Asset	19
Total Right-of-Use Asset	31
Operating Lease, Liability	12
Finance Lease, Liability	19
Total Lease Liabilities	$ 31

Leases Leases - PAC - Lease Cos

Leases Leases - PAC - Lease Costs (Details) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2019USD ($)
Lessee, Lease, Description [Line Items]
Variable Lease, Cost	$ 623
Operating Lease, Cost	170
Finance Lease, Right-of-Use Asset, Amortization	16
Finance Lease, Interest Expense	41
Short-term Lease, Cost	7
Lease, Cost	$ 857
Operating Lease, Weighted Average Remaining Lease Term	7 years 7 months 21 days
Finance Lease, Weighted Average Remaining Lease Term	28 years 10 months 2 days
Operating Lease, Weighted Average Discount Rate, Percent	5.20%
Finance Lease, Weighted Average Discount Rate, Percent	8.60%
PacifiCorp [Member]
Lessee, Lease, Description [Line Items]
Variable Lease, Cost	$ 77
Operating Lease, Cost	3
Finance Lease, Right-of-Use Asset, Amortization	1
Finance Lease, Interest Expense	2
Short-term Lease, Cost	2
Lease, Cost	$ 85
Operating Lease, Weighted Average Remaining Lease Term	13 years 11 months 16 days
Finance Lease, Weighted Average Remaining Lease Term	9 years 1 month 21 days
Operating Lease, Weighted Average Discount Rate, Percent	3.70%
Finance Lease, Weighted Average Discount Rate, Percent	10.60%

Leases Leases - PAC - Maturity

Leases Leases - PAC - Maturity Table (Details) - USD ($) $ in Millions		Dec. 31, 2019	Dec. 31, 2018
Lessee, Operating Lease, Liability, Payment, Due [Abstract]
Lessee, Operating Lease, Liability, Payments, Due Next Twelve Months		$ 147
Lessee, Operating Lease, Liability, Payments, Due Year Two		126
Lessee, Operating Lease, Liability, Payments, Due Year Three		102
Lessee, Operating Lease, Liability, Payments, Due Year Four		73
Lessee, Operating Lease, Liability, Payments, Due Year Five		50
Lessee, Operating Lease, Liability, Payments, Due after Year Five		202
Lessee, Operating Lease, Liability, Payments, Due		700
Lessee, Operating Lease, Liability, Undiscounted Excess Amount		(123)
Operating Lease, Liability		577
Finance Lease, Liability, Payment, Due [Abstract]
Finance Lease, Liability, Payments, Due Next Twelve Months		71
Finance Lease, Liability, Payments, Due Year Two		77
Finance Lease, Liability, Payments, Due Year Three		70
Finance Lease, Liability, Payments, Due Year Four		59
Finance Lease, Liability, Payments, Due Year Five		59
Finance Lease, Liability, Payments, Due after Year Five		725
Finance Lease, Liability, Payment, Due		1,061
Finance Lease, Liability, Undiscounted Excess Amount		(542)
Finance Lease, Liability		519
Lease, Liability, Payments, Due Next Twelve Months		218	$ 216	[1]
Lease, Liability, Payments, Due Year Two		203	196	[1]
Lease, Liability, Payments, Due Year Three		172	183	[1]
Lease, Liability, Payments, Due Year Five		109	117	[1]
Lease, Liability, Payments, Due Year Four		132	154	[1]
Lease, Liability, Payments, Due after Year Five		927	931	[1]
Lease, Liability, Undiscounted Excess Amount		(665)
Lease, Liability, Payments, Due		1,761	1,797	[1]
Total Lease Liabilities		1,096
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
Operating Leases, Future Minimum Payments Due, Next Twelve Months	[1]		147
Operating Leases, Future Minimum Payments, Due in Two Years	[1]		128
Operating Leases, Future Minimum Payments, Due in Three Years	[1]		110
Operating Leases, Future Minimum Payments, Due in Four Years	[1]		87
Operating Leases, Future Minimum Payments, Due in Five Years	[1]		61
Operating Leases, Future Minimum Payments, Due Thereafter	[1]		159
Operating Leases, Future Minimum Payments Due	[1]		692
Capital Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
Capital Leases, Future Minimum Payments Due, Next Twelve Months	[1]		69
Capital Leases, Future Minimum Payments Due in Two Years	[1]		68
Capital Leases, Future Minimum Payments Due in Three Years	[1]		73
Capital Leases, Future Minimum Payments Due in Four Years	[1]		67
Capital Leases, Future Minimum Payments Due in Five Years	[1]		56
Capital Leases, Future Minimum Payments Due Thereafter	[1]		772
Capital Leases, Future Minimum Payments Due	[1]		1,105
PacifiCorp [Member]
Lessee, Operating Lease, Liability, Payment, Due [Abstract]
Lessee, Operating Lease, Liability, Payments, Due Next Twelve Months		2
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		2
Lessee, Operating Lease, Liability, Payments, Due Year Five		1
Lessee, Operating Lease, Liability, Payments, Due after Year Five		7
Lessee, Operating Lease, Liability, Payments, Due		16
Lessee, Operating Lease, Liability, Undiscounted Excess Amount		(4)
Operating Lease, Liability		12
Finance Lease, Liability, Payment, Due [Abstract]
Finance Lease, Liability, Payments, Due Next Twelve Months		3
Finance Lease, Liability, Payments, Due Year Two		7
Finance Lease, Liability, Payments, Due Year Three		3
Finance Lease, Liability, Payments, Due Year Four		2
Finance Lease, Liability, Payments, Due Year Five		2
Finance Lease, Liability, Payments, Due after Year Five		14
Finance Lease, Liability, Payment, Due		31
Finance Lease, Liability, Undiscounted Excess Amount		(12)
Finance Lease, Liability		19
Lease, Liability, Payments, Due Next Twelve Months		5	7	[2]
Lease, Liability, Payments, Due Year Two		9	7	[2]
Lease, Liability, Payments, Due Year Three		5	10	[2]
Lease, Liability, Payments, Due Year Five		3	4	[2]
Lease, Liability, Payments, Due Year Four		4	5	[2]
Lease, Liability, Payments, Due after Year Five		21	23	[2]
Lease, Liability, Undiscounted Excess Amount		(16)
Lease, Liability, Payments, Due		47	56	[2]
Total Lease Liabilities		$ 31
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
Operating Leases, Future Minimum Payments Due, Next Twelve Months	[2]		3
Operating Leases, Future Minimum Payments, Due in Two Years	[2]		3
Operating Leases, Future Minimum Payments, Due in Three Years	[2]		3
Operating Leases, Future Minimum Payments, Due in Four Years	[2]		2
Operating Leases, Future Minimum Payments, Due in Five Years	[2]		2
Operating Leases, Future Minimum Payments, Due Thereafter	[2]		7
Operating Leases, Future Minimum Payments Due	[2]		20
Capital Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
Capital Leases, Future Minimum Payments Due, Next Twelve Months	[2]		4
Capital Leases, Future Minimum Payments Due in Two Years	[2]		4
Capital Leases, Future Minimum Payments Due in Three Years	[2]		7
Capital Leases, Future Minimum Payments Due in Four Years	[2]		3
Capital Leases, Future Minimum Payments Due in Five Years	[2]		2
Capital Leases, Future Minimum Payments Due Thereafter	[2]		16
Capital Leases, Future Minimum Payments Due	[2]		$ 36
[1]	Amounts included for comparability and accounted for in accordance with ASC Topic 840, "Leases".
[2]	(1) Amounts included for comparability and accounted for in accordance with ASC 840, "Leases".

Leases Leases - NPC - Summary (

Leases Leases - NPC - Summary (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Lessee, Lease, Description [Line Items]
Operating Lease, Right-of-Use Asset	$ 525
Finance Lease, Right-of-Use Asset	504
Total Right-of-Use Asset	1,029
Operating Lease, Liability	577
Finance Lease, Liability	519
Total Lease Liabilities	1,096
Nevada Power Company [Member]
Lessee, Lease, Description [Line Items]
Operating Lease, Right-of-Use Asset	13
Finance Lease, Right-of-Use Asset	441	$ 450
Total Right-of-Use Asset	454
Operating Lease, Liability	17
Finance Lease, Liability	454
Total Lease Liabilities	$ 471

Leases Leases - NPC - Lease Cos

Leases Leases - NPC - Lease Costs (Details) $ in Millions	12 Months Ended
	Dec. 31, 2019USD ($)
Lessee, Lease, Description [Line Items]
Variable Lease, Cost	$ 623
Operating Lease, Cost	170
Finance Lease, Right-of-Use Asset, Amortization	16
Finance Lease, Interest Expense	41
Lease, Cost	$ 857
Operating Lease, Weighted Average Remaining Lease Term	7 years 7 months 21 days
Finance Lease, Weighted Average Remaining Lease Term	28 years 10 months 2 days
Operating Lease, Weighted Average Discount Rate, Percent	5.20%
Finance Lease, Weighted Average Discount Rate, Percent	8.60%
Nevada Power Company [Member]
Lessee, Lease, Description [Line Items]
Variable Lease, Cost	$ 434
Operating Lease, Cost	3
Finance Lease, Right-of-Use Asset, Amortization	13
Finance Lease, Interest Expense	37
Lease, Cost	$ 487
Operating Lease, Weighted Average Remaining Lease Term	7 years 5 months 30 days
Finance Lease, Weighted Average Remaining Lease Term	30 years 6 months 18 days
Operating Lease, Weighted Average Discount Rate, Percent	4.50%
Finance Lease, Weighted Average Discount Rate, Percent	8.70%

Leases Leases - NPC - Other (De

Leases Leases - NPC - Other (Details) - USD ($) $ in Millions	Jan. 01, 2020	Dec. 31, 2019	Dec. 31, 2018
Lessee, Lease, Description [Line Items]
Operating Lease, Payments		$ 153
Finance Lease, Interest Payment on Liability		42
Finance Lease, Principal Payments		19
Right-of-Use Asset Obtained in Exchange for Finance Lease Liability		14
Sierra Pacific Power Company [Member]
Lessee, Lease, Description [Line Items]
Operating Lease, Payments		3
Finance Lease, Interest Payment on Liability		3
Finance Lease, Principal Payments		3
Right-of-Use Asset Obtained in Exchange for Finance Lease Liability		$ 5
Utilities Aggregate Share Transmission Line Project		5.00%
Remaining Share Transmission Line Project		75.00%
Lessee, Finance Lease, Term of Contract		41 years
ON Line Financing Lease Obligation		$ 35	$ 21
Sierra Pacific Power Company [Member] | Public Utilities Commission, Nevada [Member] | ON Line Reallocaton [Member] | Forecast [Member]
Lessee, Lease, Description [Line Items]
Utilities Aggregate Share Transmission Line Project	25.00%
Sierra Pacific Power Company [Member] | ON Line deferrals
Lessee, Lease, Description [Line Items]
Utilities Aggregate Share Transmission Line Project		25.00%
Nevada Power Company [Member]
Lessee, Lease, Description [Line Items]
Operating Lease, Payments		$ 3
Finance Lease, Interest Payment on Liability		37
Finance Lease, Principal Payments		14
Right-of-Use Asset Obtained in Exchange for Finance Lease Liability		$ 9
Utilities Aggregate Share Transmission Line Project		95.00%
Remaining Share Transmission Line Project		75.00%
Lessee, Finance Lease, Term of Contract		41 years
ON Line Financing Lease Obligation		$ 385	$ 395
Nevada Power Company [Member] | Public Utilities Commission, Nevada [Member] | ON Line Reallocaton [Member] | Forecast [Member]
Lessee, Lease, Description [Line Items]
Utilities Aggregate Share Transmission Line Project	75.00%
Nevada Power Company [Member] | ON Line deferrals
Lessee, Lease, Description [Line Items]
Utilities Aggregate Share Transmission Line Project		25.00%

Leases Leases - NPC - Maturity

Leases Leases - NPC - Maturity Table (Details) - USD ($) $ in Millions		Dec. 31, 2019	Dec. 31, 2018
Lessee, Operating Lease, Liability, Payment, Due [Abstract]
Lessee, Operating Lease, Liability, Payments, Due Next Twelve Months		$ 147
Lessee, Operating Lease, Liability, Payments, Due Year Two		126
Lessee, Operating Lease, Liability, Payments, Due Year Three		102
Lessee, Operating Lease, Liability, Payments, Due Year Four		73
Lessee, Operating Lease, Liability, Payments, Due Year Five		50
Lessee, Operating Lease, Liability, Payments, Due after Year Five		202
Lessee, Operating Lease, Liability, Payments, Due		700
Lessee, Operating Lease, Liability, Undiscounted Excess Amount		(123)
Operating Lease, Liability		577
Finance Lease, Liability, Payment, Due [Abstract]
Finance Lease, Liability, Payments, Due Next Twelve Months		71
Finance Lease, Liability, Payments, Due Year Two		77
Finance Lease, Liability, Payments, Due Year Three		70
Finance Lease, Liability, Payments, Due Year Four		59
Finance Lease, Liability, Payments, Due Year Five		59
Finance Lease, Liability, Payments, Due after Year Five		725
Finance Lease, Liability, Payment, Due		1,061
Finance Lease, Liability, Undiscounted Excess Amount		(542)
Finance Lease, Liability		519
Lease, Liability, Payments, Due Next Twelve Months		218	$ 216	[1]
Lease, Liability, Payments, Due Year Two		203	196	[1]
Lease, Liability, Payments, Due Year Three		172	183	[1]
Lease, Liability, Payments, Due Year Four		132	154	[1]
Lease, Liability, Payments, Due Year Five		109	117	[1]
Lease, Liability, Payments, Due after Year Five		927	931	[1]
Lease, Liability, Payments, Due		1,761	1,797	[1]
Lease, Liability, Undiscounted Excess Amount		(665)
Total Lease Liabilities		1,096
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
Operating Leases, Future Minimum Payments Due, Next Twelve Months	[1]		147
Operating Leases, Future Minimum Payments, Due in Two Years	[1]		128
Operating Leases, Future Minimum Payments, Due in Three Years	[1]		110
Operating Leases, Future Minimum Payments, Due in Four Years	[1]		87
Operating Leases, Future Minimum Payments, Due in Five Years	[1]		61
Operating Leases, Future Minimum Payments, Due Thereafter	[1]		159
Operating Leases, Future Minimum Payments Due	[1]		692
Capital Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
Capital Leases, Future Minimum Payments Due, Next Twelve Months	[1]		69
Capital Leases, Future Minimum Payments Due in Two Years	[1]		68
Capital Leases, Future Minimum Payments Due in Three Years	[1]		73
Capital Leases, Future Minimum Payments Due in Four Years	[1]		67
Capital Leases, Future Minimum Payments Due in Five Years	[1]		56
Capital Leases, Future Minimum Payments Due Thereafter	[1]		772
Capital Leases, Future Minimum Payments Due	[1]		1,105
Nevada Power Company [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		3
Lessee, Operating Lease, Liability, Payments, Due Year Three		3
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		7
Lessee, Operating Lease, Liability, Payments, Due		20
Lessee, Operating Lease, Liability, Undiscounted Excess Amount		(3)
Operating Lease, Liability		17
Finance Lease, Liability, Payment, Due [Abstract]
Finance Lease, Liability, Payments, Due Next Twelve Months		60
Finance Lease, Liability, Payments, Due Year Two		64
Finance Lease, Liability, Payments, Due Year Three		62
Finance Lease, Liability, Payments, Due Year Four		51
Finance Lease, Liability, Payments, Due Year Five		52
Finance Lease, Liability, Payments, Due after Year Five		664
Finance Lease, Liability, Payment, Due		953
Finance Lease, Liability, Undiscounted Excess Amount		(499)
Finance Lease, Liability		454
Lease, Liability, Payments, Due Next Twelve Months		63	62	[1]
Lease, Liability, Payments, Due Year Two		67	62	[1]
Lease, Liability, Payments, Due Year Three		65	64	[1]
Lease, Liability, Payments, Due Year Four		53	63	[1]
Lease, Liability, Payments, Due Year Five		54	52	[1]
Lease, Liability, Payments, Due after Year Five		671	719	[1]
Lease, Liability, Payments, Due		973	1,022	[1]
Lease, Liability, Undiscounted Excess Amount		(502)
Total Lease Liabilities		$ 471
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
Operating Leases, Future Minimum Payments Due, Next Twelve Months	[1]		3
Operating Leases, Future Minimum Payments, Due in Two Years	[1]		3
Operating Leases, Future Minimum Payments, Due in Three Years	[1]		3
Operating Leases, Future Minimum Payments, Due in Four Years	[1]		3
Operating Leases, Future Minimum Payments, Due in Five Years	[1]		2
Operating Leases, Future Minimum Payments, Due Thereafter	[1]		10
Operating Leases, Future Minimum Payments Due	[1]		24
Capital Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
Capital Leases, Future Minimum Payments Due, Next Twelve Months	[1]		59
Capital Leases, Future Minimum Payments Due in Two Years	[1]		59
Capital Leases, Future Minimum Payments Due in Three Years	[1]		61
Capital Leases, Future Minimum Payments Due in Four Years	[1]		60
Capital Leases, Future Minimum Payments Due in Five Years	[1]		50
Capital Leases, Future Minimum Payments Due Thereafter	[1]		709
Capital Leases, Future Minimum Payments Due	[1]		$ 998
[1]	Amounts included for comparability and accounted for in accordance with ASC Topic 840, "Leases".

Leases Leases - SPPC - Summary

Leases Leases - SPPC - Summary (Details) $ in Millions	Dec. 31, 2019USD ($)
Lessee, Lease, Description [Line Items]
Operating Lease, Right-of-Use Asset	$ 525
Finance Lease, Right-of-Use Asset	504
Total Right-of-Use Asset	1,029
Operating Lease, Liability	577
Finance Lease, Liability	519
Total Lease Liabilities	1,096
Sierra Pacific Power Company [Member]
Lessee, Lease, Description [Line Items]
Operating Lease, Right-of-Use Asset	17
Finance Lease, Right-of-Use Asset	43
Total Right-of-Use Asset	60
Operating Lease, Liability	17
Finance Lease, Liability	45
Total Lease Liabilities	$ 62

Leases Leases - SPPC - Lease Co

Leases Leases - SPPC - Lease Costs (Details) $ in Millions	12 Months Ended
	Dec. 31, 2019USD ($)
Lessee, Lease, Description [Line Items]
Variable Lease, Cost	$ 623
Operating Lease, Cost	170
Finance Lease, Right-of-Use Asset, Amortization	16
Finance Lease, Interest Expense	41
Lease, Cost	$ 857
Operating Lease, Weighted Average Remaining Lease Term	7 years 7 months 21 days
Finance Lease, Weighted Average Remaining Lease Term	28 years 10 months 2 days
Operating Lease, Weighted Average Discount Rate, Percent	5.20%
Finance Lease, Weighted Average Discount Rate, Percent	8.60%
Sierra Pacific Power Company [Member]
Lessee, Lease, Description [Line Items]
Variable Lease, Cost	$ 69
Operating Lease, Cost	1
Finance Lease, Right-of-Use Asset, Amortization	2
Finance Lease, Interest Expense	2
Lease, Cost	$ 74
Operating Lease, Weighted Average Remaining Lease Term	26 years 3 months 26 days
Finance Lease, Weighted Average Remaining Lease Term	20 years 10 months 21 days
Operating Lease, Weighted Average Discount Rate, Percent	5.00%
Finance Lease, Weighted Average Discount Rate, Percent	7.10%

Leases Leases - SPPC - Other (D

Leases Leases - SPPC - Other (Details) - USD ($) $ in Millions	Jan. 01, 2020	Dec. 31, 2019	Dec. 31, 2018
Lessee, Lease, Description [Line Items]
Operating Lease, Payments		$ (153)
Finance Lease, Interest Payment on Liability		(42)
Finance Lease, Principal Payments		(19)
Right-of-Use Asset Obtained in Exchange for Finance Lease Liability		14
Sierra Pacific Power Company [Member]
Lessee, Lease, Description [Line Items]
Operating Lease, Payments		(3)
Finance Lease, Interest Payment on Liability		(3)
Finance Lease, Principal Payments		(3)
Right-of-Use Asset Obtained in Exchange for Finance Lease Liability		$ 5
Utilities Aggregate Share Transmission Line Project		5.00%
Remaining Share Transmission Line Project		75.00%
Lessee, Finance Lease, Term of Contract		41 years
ON Line Financing Lease Obligation		$ 35	$ 21
Sierra Pacific Power Company [Member] | Public Utilities Commission, Nevada [Member] | ON Line Reallocaton [Member] | Forecast [Member]
Lessee, Lease, Description [Line Items]
Utilities Aggregate Share Transmission Line Project	25.00%
Sierra Pacific Power Company [Member] | ON Line deferrals
Lessee, Lease, Description [Line Items]
Utilities Aggregate Share Transmission Line Project		25.00%
Nevada Power Company [Member]
Lessee, Lease, Description [Line Items]
Operating Lease, Payments		$ (3)
Finance Lease, Interest Payment on Liability		(37)
Finance Lease, Principal Payments		(14)
Right-of-Use Asset Obtained in Exchange for Finance Lease Liability		$ 9
Utilities Aggregate Share Transmission Line Project		95.00%
Remaining Share Transmission Line Project		75.00%
Lessee, Finance Lease, Term of Contract		41 years
ON Line Financing Lease Obligation		$ 385	$ 395
Nevada Power Company [Member] | Public Utilities Commission, Nevada [Member] | ON Line Reallocaton [Member] | Forecast [Member]
Lessee, Lease, Description [Line Items]
Utilities Aggregate Share Transmission Line Project	75.00%
Nevada Power Company [Member] | ON Line deferrals
Lessee, Lease, Description [Line Items]
Utilities Aggregate Share Transmission Line Project		25.00%

Leases Leases - SPPC - Maturity

Leases Leases - SPPC - Maturity Table (Details) - USD ($) $ in Millions		Dec. 31, 2019	Dec. 31, 2018
Lessee, Operating Lease, Liability, Payment, Due [Abstract]
Lessee, Operating Lease, Liability, Payments, Due Next Twelve Months		$ 147
Lessee, Operating Lease, Liability, Payments, Due Year Two		126
Lessee, Operating Lease, Liability, Payments, Due Year Three		102
Lessee, Operating Lease, Liability, Payments, Due Year Four		73
Lessee, Operating Lease, Liability, Payments, Due Year Five		50
Lessee, Operating Lease, Liability, Payments, Due after Year Five		202
Lessee, Operating Lease, Liability, Payments, Due		700
Lessee, Operating Lease, Liability, Undiscounted Excess Amount		(123)
Operating Lease, Liability		577
Finance Lease, Liability, Payment, Due [Abstract]
Finance Lease, Liability, Payments, Due Next Twelve Months		71
Finance Lease, Liability, Payments, Due Year Two		77
Finance Lease, Liability, Payments, Due Year Three		70
Finance Lease, Liability, Payments, Due Year Four		59
Finance Lease, Liability, Payments, Due Year Five		59
Finance Lease, Liability, Payments, Due after Year Five		725
Finance Lease, Liability, Payment, Due		1,061
Finance Lease, Liability, Undiscounted Excess Amount		(542)
Finance Lease, Liability		519
Lease, Liability, Payments, Due Next Twelve Months		218	$ 216	[1]
Lease, Liability, Payments, Due Year Two		203	196	[1]
Lease, Liability, Payments, Due Year Three		172	183	[1]
Lease, Liability, Payments, Due Year Four		132	154	[1]
Lease, Liability, Payments, Due Year Five		109	117	[1]
Lease, Liability, Payments, Due after Year Five		927	931	[1]
Lease, Liability, Payments, Due		1,761	1,797	[1]
Lease, Liability, Undiscounted Excess Amount		(665)
Total Lease Liabilities		1,096
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
Operating Leases, Future Minimum Payments Due, Next Twelve Months	[1]		147
Operating Leases, Future Minimum Payments, Due in Two Years	[1]		128
Operating Leases, Future Minimum Payments, Due in Three Years	[1]		110
Operating Leases, Future Minimum Payments, Due in Four Years	[1]		87
Operating Leases, Future Minimum Payments, Due in Five Years	[1]		61
Operating Leases, Future Minimum Payments, Due Thereafter	[1]		159
Operating Leases, Future Minimum Payments Due	[1]		692
Capital Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
Capital Leases, Future Minimum Payments Due, Next Twelve Months	[1]		69
Capital Leases, Future Minimum Payments Due in Two Years	[1]		68
Capital Leases, Future Minimum Payments Due in Three Years	[1]		73
Capital Leases, Future Minimum Payments Due in Four Years	[1]		67
Capital Leases, Future Minimum Payments Due in Five Years	[1]		56
Capital Leases, Future Minimum Payments Due Thereafter	[1]		772
Capital Leases, Future Minimum Payments Due	[1]		1,105
Sierra Pacific Power Company [Member]
Lessee, Operating Lease, Liability, Payment, Due [Abstract]
Lessee, Operating Lease, Liability, Payments, Due Next Twelve Months		2
Lessee, Operating Lease, Liability, Payments, Due Year Two		2
Lessee, Operating Lease, Liability, Payments, Due Year Three		1
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		26
Lessee, Operating Lease, Liability, Payments, Due		33
Lessee, Operating Lease, Liability, Undiscounted Excess Amount		(16)
Operating Lease, Liability		17
Finance Lease, Liability, Payment, Due [Abstract]
Finance Lease, Liability, Payments, Due Next Twelve Months		6
Finance Lease, Liability, Payments, Due Year Two		6
Finance Lease, Liability, Payments, Due Year Three		6
Finance Lease, Liability, Payments, Due Year Four		6
Finance Lease, Liability, Payments, Due Year Five		5
Finance Lease, Liability, Payments, Due after Year Five		46
Finance Lease, Liability, Payment, Due		75
Finance Lease, Liability, Undiscounted Excess Amount		(30)
Finance Lease, Liability		45
Lease, Liability, Payments, Due Next Twelve Months		8	8	[2]
Lease, Liability, Payments, Due Year Two		8	6	[2]
Lease, Liability, Payments, Due Year Three		7	7	[2]
Lease, Liability, Payments, Due Year Four		7	5	[2]
Lease, Liability, Payments, Due Year Five		6	5	[2]
Lease, Liability, Payments, Due after Year Five		72	75	[2]
Lease, Liability, Payments, Due		108	106	[2]
Lease, Liability, Undiscounted Excess Amount		(46)
Total Lease Liabilities		$ 62
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
Operating Leases, Future Minimum Payments Due, Next Twelve Months	[2]		2
Operating Leases, Future Minimum Payments, Due in Two Years	[2]		2
Operating Leases, Future Minimum Payments, Due in Three Years	[2]		2
Operating Leases, Future Minimum Payments, Due in Four Years	[2]		1
Operating Leases, Future Minimum Payments, Due in Five Years	[2]		1
Operating Leases, Future Minimum Payments, Due Thereafter	[2]		28
Operating Leases, Future Minimum Payments Due	[2]		36
Capital Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
Capital Leases, Future Minimum Payments Due, Next Twelve Months	[2]		6
Capital Leases, Future Minimum Payments Due in Two Years	[2]		4
Capital Leases, Future Minimum Payments Due in Three Years	[2]		5
Capital Leases, Future Minimum Payments Due in Four Years	[2]		4
Capital Leases, Future Minimum Payments Due in Five Years	[2]		4
Capital Leases, Future Minimum Payments Due Thereafter	[2]		47
Capital Leases, Future Minimum Payments Due	[2]		$ 70
[1]	Amounts included for comparability and accounted for in accordance with ASC Topic 840, "Leases".
[2]	(1) Amounts included for comparability and accounted for in accordance with ASC Topic 840, "Leases".

Regulatory Matters - Regulatory

Regulatory Matters - Regulatory Assets (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018
Regulatory Assets [Line Items]
Regulatory assets		$ 115	$ 171
Regulatory assets, noncurrent		2,766	2,896
Total regulatory assets		2,881	3,067
Remaining Amounts of Regulatory Assets for which No Return on Investment During Recovery Period is Provided		1,400	1,300
Deferred Income Tax Charge [Member]
Regulatory Assets [Line Items]
Total regulatory assets	[1]	$ 223	196
Regulatory asset amortization period years	[1]	Various
Employee benefit plans [Member]
Regulatory Assets [Line Items]
Total regulatory assets	[2]	$ 667	773
Regulatory asset amortization period years	[2]	15.2053973013493
Asset disposition costs [Member]
Regulatory Assets [Line Items]
Total regulatory assets		$ 391	358
Regulatory asset amortization period years		Various
Deferred net power costs [Member]
Regulatory Assets [Line Items]
Total regulatory assets		$ 110	103
Regulatory asset amortization period years		1.92727272727273
Asset retirement obligations
Regulatory Assets [Line Items]
Total regulatory assets		$ 445	375
Regulatory asset amortization period years		Various
Unrealized loss on regulated derivative contracts [Member]
Regulatory Assets [Line Items]
Total regulatory assets		$ 78	120
Regulatory asset amortization period years		2.58974358974359
Abandoned projects
Regulatory Assets [Line Items]
Total regulatory assets		$ 58	134
Regulatory asset amortization period years		3.48275862068966
Deferred Operating Costs
Regulatory Assets [Line Items]
Total regulatory assets		$ 134	141
Regulatory asset amortization period years		11
Unamortized contract values [Member]
Regulatory Assets [Line Items]
Total regulatory assets		$ 60	79
Regulatory asset amortization period years		4
Regulatory assets other [Member]
Regulatory Assets [Line Items]
Total regulatory assets		$ 715	$ 788
Regulatory asset amortization period years		Various
[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]	(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 - Regulato_2

Regulatory Matters - Regulatory Liabilities (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Regulatory Liabilities [Line Items]
Federal statutory income tax rate		21.00%	21.00%	35.00%
Regulatory liabilities		$ 211	$ 160
Regulatory liabilities, noncurrent		7,100	7,346
Regulatory Liabilities		7,311	7,506
Deferred Income Tax Charge [Member]
Regulatory Liabilities [Line Items]
Regulatory Liabilities	[1]	$ 3,611	3,923
Weighted average remaining life	[1]	Various
Cost of removal
Regulatory Liabilities [Line Items]
Regulatory Liabilities	[2]	$ 2,370	2,426
Weighted average remaining life	[2]	26.8240506329114
Asset retirement obligations
Regulatory Liabilities [Line Items]
Regulatory Liabilities		$ 241	163
Weighted average remaining life		33
Levelized depreciation [Member]
Regulatory Liabilities [Line Items]
Regulatory Liabilities		$ 304	329
Weighted average remaining life		29
Impact fees
Regulatory Liabilities [Line Items]
Regulatory Liabilities		$ 72	88
Weighted average remaining life		2
Other
Regulatory Liabilities [Line Items]
Regulatory Liabilities		$ 713	$ 577
Weighted average remaining life		Various
Tax Cuts and Jobs Act of 2017 [Member]
Regulatory Liabilities [Line Items]
Federal statutory income tax rate		21.00%	21.00%
Tax Cuts and Jobs Act of 2017 [Member] | Deferred Income Tax Charge [Member]
Regulatory Liabilities [Line Items]
Regulatory Liabilities	[3]	$ 5,950
[1]	(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. See Note 12 for further discussion of 2017 Tax Reform impacts.
[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.
[3]	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.

Regulatory Matters - PacifiCorp

Regulatory Matters - PacifiCorp - Regulatory Assets (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018
Regulatory Assets [Line Items]
Regulatory assets		$ 115	$ 171
Regulatory assets, noncurrent		2,766	2,896
Total regulatory assets		2,881	3,067
Remaining Amounts of Regulatory Assets for which No Return on Investment During Recovery Period is Provided		1,400	1,300
Deferred Income Tax Charge [Member]
Regulatory Assets [Line Items]
Total regulatory assets	[1]	$ 223	196
Regulatory asset amortization period years	[1]	Various
Employee benefit plans [Member]
Regulatory Assets [Line Items]
Total regulatory assets	[2]	$ 667	773
Regulatory asset amortization period years	[2]	15.2053973013493
Unamortized contract values [Member]
Regulatory Assets [Line Items]
Total regulatory assets		$ 60	79
Regulatory asset amortization period years		4
Deferred net power costs [Member]
Regulatory Assets [Line Items]
Total regulatory assets		$ 110	103
Regulatory asset amortization period years		1.92727272727273
Unrealized loss on regulated derivative contracts [Member]
Regulatory Assets [Line Items]
Total regulatory assets		$ 78	120
Regulatory asset amortization period years		2.58974358974359
Asset retirement obligations
Regulatory Assets [Line Items]
Total regulatory assets		$ 445	375
Regulatory asset amortization period years		Various
PacifiCorp [Member]
Regulatory Assets [Line Items]
Regulatory assets		$ 63	36
Regulatory assets, noncurrent		1,060	1,076
Total regulatory assets		1,123	1,112
Remaining Amounts of Regulatory Assets for which No Return on Investment During Recovery Period is Provided		609	636
PacifiCorp [Member] | Employee benefit plans [Member]
Regulatory Assets [Line Items]
Total regulatory assets	[3]	$ 422	448
Regulatory asset amortization period years	[3]	19 years
PacifiCorp [Member] | Utah mine disposition [Member]
Regulatory Assets [Line Items]
Total regulatory assets	[4]	$ 125	136
Regulatory asset amortization period years	[4]	Various
PacifiCorp [Member] | Unamortized contract values [Member]
Regulatory Assets [Line Items]
Total regulatory assets		$ 60	79
Regulatory asset amortization period years		4 years
PacifiCorp [Member] | Deferred net power costs [Member]
Regulatory Assets [Line Items]
Total regulatory assets		$ 106	62
Regulatory asset amortization period years		2 years
PacifiCorp [Member] | Unrealized loss on regulated derivative contracts [Member]
Regulatory Assets [Line Items]
Total regulatory assets		$ 62	96
Regulatory asset amortization period years		3 years
PacifiCorp [Member] | Asset retirement obligations
Regulatory Assets [Line Items]
Total regulatory assets		$ 140	119
Regulatory asset amortization period years		28 years
PacifiCorp [Member] | Other
Regulatory Assets [Line Items]
Total regulatory assets		$ 208	$ 172
Regulatory asset amortization period years		Various
[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]	(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.
[3]	(1)Represents amounts not yet recognized as a component of net periodic benefit cost that are expected to be included in rates when recognized.
[4]	(2)Amounts represent regulatory assets established as a result of the Utah mine disposition in 2015 for the net property, plant and equipment not considered probable of disallowance and for the portion of losses associated with the assets held for sale, UMWA 1974 Pension Plan withdrawal and closure costs incurred to date considered probable of recovery.

Regulatory Matters - PacifiCo_2

Regulatory Matters - PacifiCorp - Regulatory Liabilities (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Regulatory Liabilities [Line Items]
Federal statutory income tax rate		21.00%	21.00%	35.00%
Regulatory liabilities		$ 211	$ 160
Regulatory liabilities, noncurrent		7,100	7,346
Regulatory Liabilities		7,311	7,506
Cost of removal
Regulatory Liabilities [Line Items]
Regulatory Liabilities	[1]	$ 2,370	2,426
Regulatory liability amortization period years	[1]	26.8240506329114
Deferred Income Tax Charge [Member]
Regulatory Liabilities [Line Items]
Regulatory Liabilities	[2]	$ 3,611	$ 3,923
Regulatory liability amortization period years	[2]	Various
PacifiCorp [Member]
Regulatory Liabilities [Line Items]
Federal statutory income tax rate		21.00%	21.00%	35.00%
Regulatory liabilities		$ 56	$ 77
Regulatory liabilities, noncurrent		2,913	2,978
Regulatory Liabilities		2,969	3,055
PacifiCorp [Member] | Cost of removal
Regulatory Liabilities [Line Items]
Regulatory liabilities, noncurrent		1,019	994
Regulatory Liabilities	[3]	$ 1,019	994
Regulatory liability amortization period years	[3]	26 years
PacifiCorp [Member] | Deferred Income Tax Charge [Member]
Regulatory Liabilities [Line Items]
Regulatory Liabilities	[4]	$ 1,653	1,803
Regulatory liability amortization period years	[4]	Various
PacifiCorp [Member] | Other
Regulatory Liabilities [Line Items]
Regulatory Liabilities		$ 297	$ 258
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%	21.00%
Tax Cuts and Jobs Act of 2017 [Member] | Deferred Income Tax Charge [Member]
Regulatory Liabilities [Line Items]
Regulatory Liabilities	[5]	$ 5,950
[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]	(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. See Note 12 for further discussion of 2017 Tax Reform impacts.
[3]	(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.
[4]	(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.
[5]	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.

Regulatory Matters - MEC - Regu

Regulatory Matters - MEC - Regulatory Assets (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018
Regulatory Assets [Line Items]
Regulatory assets		$ 2,766	$ 2,896
Remaining Amounts of Regulatory Assets for which No Return on Investment During Recovery Period is Provided		$ 1,400	1,300
Deferred Income Tax Charge [Member]
Regulatory Assets [Line Items]
Regulatory asset amortization period years	[1]	Various
Asset retirement obligations
Regulatory Assets [Line Items]
Regulatory asset amortization period years		Various
Employee benefit plans [Member]
Regulatory Assets [Line Items]
Regulatory asset amortization period years	[2]	15.2053973013493
Unrealized loss on regulated derivative contracts [Member]
Regulatory Assets [Line Items]
Regulatory asset amortization period years		2.58974358974359
MidAmerican Energy Company [Member]
Regulatory Assets [Line Items]
Regulatory assets		$ 289	273
Remaining Amounts of Regulatory Assets for which No Return on Investment During Recovery Period is Provided		$ 300	300
MidAmerican Energy Company [Member] | Asset retirement obligations
Regulatory Assets [Line Items]
Regulatory Asset, Amortization Period	[3]	6 years
Regulatory assets	[3]	$ 223	160
MidAmerican Energy Company [Member] | Employee benefit plans [Member]
Regulatory Assets [Line Items]
Regulatory Asset, Amortization Period	[4]	12 years
Regulatory assets	[4]	$ 26	62
MidAmerican Energy Company [Member] | Unrealized loss on regulated derivative contracts [Member]
Regulatory Assets [Line Items]
Regulatory Asset, Amortization Period		1 year
Regulatory assets		$ 7	19
MidAmerican Energy Company [Member] | Other
Regulatory Assets [Line Items]
Regulatory asset amortization period years		Various
Regulatory assets		$ 33	$ 32
[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]	(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.
[3]	(1)Amount predominantly relates to asset retirement obligations for fossil-fueled and wind-powered generating facilities. Refer to Note 11 for a discussion of asset retirement obligations.
[4]	(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, 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%	35.00%
Regulatory liabilities		$ 7,100	$ 7,346
Cost of removal
Regulatory Liabilities [Line Items]
Regulatory liability amortization period years	[1]	26.8240506329114
Deferred Income Tax Charge [Member]
Regulatory Liabilities [Line Items]
Regulatory liability amortization period years	[2]	Various
Asset retirement obligations
Regulatory Liabilities [Line Items]
Regulatory liability amortization period years		33
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%	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%	35.00%
Regulatory liabilities		$ 1,406	$ 1,620
MidAmerican Energy Company [Member] | Cost of removal
Regulatory Liabilities [Line Items]
Regulatory Liability, Amortization Period	[3]	29 years
Regulatory liabilities	[3]	$ 572	708
MidAmerican Energy Company [Member] | Deferred Income Tax Charge [Member]
Regulatory Liabilities [Line Items]
Regulatory liability amortization period years	[4]	Various
Regulatory liabilities	[4]	$ 478	626
MidAmerican Energy Company [Member] | Asset retirement obligations
Regulatory Liabilities [Line Items]
Regulatory Liability, Amortization Period	[4]	33 years
Regulatory liabilities	[4]	$ 241	160
MidAmerican Energy Company [Member] | Pension and other postretirement costs [Member]
Regulatory Liabilities [Line Items]
Regulatory liability amortization period years		P10Y
Regulatory liabilities	[5]	$ 32	0
MidAmerican Energy Company [Member] | Transmission MVP CWIP Return [Member]
Regulatory Liabilities [Line Items]
Regulatory Liability, Amortization Period	[6]	53 years
Regulatory liabilities	[6]	$ 35	36
MidAmerican Energy Company [Member] | Regulatory revenue sharing arrangement [Member]
Regulatory Liabilities [Line Items]
Regulatory Liability, Amortization Period	[7]	1 year
Regulatory liabilities	[7]	$ 22	70
MidAmerican Energy Company [Member] | Other
Regulatory Liabilities [Line Items]
Regulatory liability amortization period years		Various
Regulatory liabilities		$ 26	$ 20
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 regulated property, plant and equipment in accordance with accepted regulatory practices. Amounts are deducted from rate base or otherwise accrue a carrying cost.
[2]	(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. See Note 12 for further discussion of 2017 Tax Reform impacts.
[3]	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.
[4]	Amount represents the excess of nuclear decommission trust assets over the related asset retirement obligation. Refer to Note 11 for a discussion of asset retirement obligations.
[5]	Represents current-year accruals under a regulatory arrangement in Iowa in which equity returns exceeding specified thresholds reduce utility plant upon final determination.
[6]	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.
[7]	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.

Regulatory Matters Regulatory M

Regulatory Matters Regulatory Matters - NPC - Regulatory Assets (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018
Regulatory Assets [Line Items]
Total regulatory assets		$ 2,881	$ 3,067
Regulatory assets		115	171
Regulatory assets		2,766	2,896
Remaining Amounts of Regulatory Assets for which No Return on Investment During Recovery Period is Provided		$ 1,400	1,300
Deferred Operating Costs
Regulatory Assets [Line Items]
Regulatory asset amortization period years		11
Total regulatory assets		$ 134	141
Asset retirement obligations
Regulatory Assets [Line Items]
Regulatory asset amortization period years		Various
Total regulatory assets		$ 445	375
Abandoned projects
Regulatory Assets [Line Items]
Regulatory asset amortization period years		3.48275862068966
Total regulatory assets		$ 58	134
Nevada Power Company [Member]
Regulatory Assets [Line Items]
Total regulatory assets		801	917
Regulatory assets		1	39
Regulatory assets		800	878
Remaining Amounts of Regulatory Assets for which No Return on Investment During Recovery Period is Provided		$ 303	334
Nevada Power Company [Member] | Decommissioning costs
Regulatory Assets [Line Items]
Regulatory Asset, Amortization Period	[1]	3 years
Total regulatory assets	[1]	$ 241	222
Regulatory Assets, Amortization Period Unknown		$ 104	81
Nevada Power Company [Member] | Deferred Operating Costs
Regulatory Assets [Line Items]
Regulatory Asset, Amortization Period		9 years
Total regulatory assets		$ 136	152
Nevada Power Company [Member] | Merger costs from 1999 merger
Regulatory Assets [Line Items]
Regulatory Asset, Amortization Period		25 years
Total regulatory assets		$ 120	125
Nevada Power Company [Member] | Employee benefit plans
Regulatory Assets [Line Items]
Regulatory Asset, Amortization Period	[2]	8 years
Total regulatory assets	[2]	$ 87	105
Nevada Power Company [Member] | Asset retirement obligations
Regulatory Assets [Line Items]
Regulatory Asset, Amortization Period		6 years
Total regulatory assets		$ 67	68
Nevada Power Company [Member] | Legacy meters
Regulatory Assets [Line Items]
Regulatory Asset, Amortization Period		13 years
Total regulatory assets		$ 49	53
Nevada Power Company [Member] | ON Line deferrals
Regulatory Assets [Line Items]
Regulatory Asset, Amortization Period		34 years
Total regulatory assets		$ 45	46
Nevada Power Company [Member] | Abandoned projects
Regulatory Assets [Line Items]
Regulatory Asset, Amortization Period		1 year
Total regulatory assets		$ 12	46
Nevada Power Company [Member] | Deferred energy costs
Regulatory Assets [Line Items]
Regulatory Asset, Amortization Period		1 year
Total regulatory assets		$ 0	47
Nevada Power Company [Member] | Other
Regulatory Assets [Line Items]
Regulatory asset amortization period years		Various
Total regulatory assets		$ 44	$ 53
[1]	Amount includes regulatory assets with an indeterminate life of $104 million and $81 million as of December 31, 2019 and 2018, 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 - Regu

Regulatory Matters - NPC - Regulatory Liabilities (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Regulatory Liabilities [Line Items]
Regulatory Liabilities		$ 7,311	$ 7,506
Regulatory liabilities		211	160
Regulatory liabilities		$ 7,100	$ 7,346
Federal statutory income tax rate		21.00%	21.00%	35.00%
Cost of removal
Regulatory Liabilities [Line Items]
Regulatory liability amortization period years	[1]	26.8240506329114
Regulatory Liabilities	[1]	$ 2,370	$ 2,426
Impact fees
Regulatory Liabilities [Line Items]
Regulatory liability amortization period years		2
Regulatory Liabilities		$ 72	88
Other
Regulatory Liabilities [Line Items]
Regulatory liability amortization period years		Various
Regulatory Liabilities		$ 713	577
Nevada Power Company [Member]
Regulatory Liabilities [Line Items]
Regulatory Liabilities		1,256	1,186
Regulatory liabilities		93	49
Regulatory liabilities		$ 1,163	$ 1,137
Federal statutory income tax rate		21.00%	21.00%	35.00%
Nevada Power Company [Member] | Deferred income taxes
Regulatory Liabilities [Line Items]
Regulatory liability amortization period years	[2]	Various
Regulatory Liabilities	[2]	$ 681	$ 677
Nevada Power Company [Member] | Cost of removal
Regulatory Liabilities [Line Items]
Regulatory Liabilities	[3]	$ 332	320
Regulatory Liability, Amortization Period	[3]	33 years
Nevada Power Company [Member] | Impact fees
Regulatory Liabilities [Line Items]
Regulatory Liabilities	[4]	$ 72	86
Regulatory Liability, Amortization Period	[4]	2 years
Nevada Power Company [Member] | Other
Regulatory Liabilities [Line Items]
Regulatory liability amortization period years		Various
Regulatory Liabilities		$ 171	$ 103
[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) $ in Millions		3 Months Ended	12 Months Ended
		Dec. 31, 2019USD ($)MW	Dec. 31, 2019USD ($)MW	Dec. 31, 2018USD ($)
Public Utilities, General Disclosures [Line Items]
Total regulatory assets		$ 2,881	$ 2,881	$ 3,067
Nevada Power Company [Member]
Public Utilities, General Disclosures [Line Items]
Total regulatory assets		$ 801	$ 801	917
Nevada Power Company [Member] | 255 Megawatts of Coal Energy [Member]
Public Utilities, General Disclosures [Line Items]
Coal-Fired Power Plant Capacity | MW		255	255
Nevada Power Company [Member] | Decommissioning costs
Public Utilities, General Disclosures [Line Items]
Total regulatory assets	[1]	$ 241	$ 241	222
Nevada Power Company [Member] | Navajo Generating Station [Member]
Public Utilities, General Disclosures [Line Items]
Jointly Owned Utility Plant, Proportionate Ownership Share	[2]	11.00%	11.00%
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	$ 8	$ 9
Nevada Power Company [Member] | Public Utilities Commission, Nevada [Member] | Emissions Reduction and Capacity Retirement Plan [Member] | Decommissioning costs
Public Utilities, General Disclosures [Line Items]
Total regulatory assets		$ 12	$ 12
[1]	Amount includes regulatory assets with an indeterminate life of $104 million and $81 million as of December 31, 2019 and 2018, respectively.
[2]	Includes amounts related to nuclear fuel.

Regulatory Matters - SPPC - Reg

Regulatory Matters - SPPC - Regulatory Assets (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018
Regulatory Assets [Line Items]
Total regulatory assets		$ 2,881	$ 3,067
Regulatory assets		115	171
Regulatory assets		2,766	2,896
Remaining Amounts of Regulatory Assets for which No Return on Investment During Recovery Period is Provided		$ 1,400	1,300
Abandoned projects
Regulatory Assets [Line Items]
Regulatory asset amortization period years		3.48275862068966
Total regulatory assets		$ 58	134
Deferred Operating Costs
Regulatory Assets [Line Items]
Regulatory asset amortization period years		11
Total regulatory assets		$ 134	141
Sierra Pacific Power Company [Member]
Regulatory Assets [Line Items]
Total regulatory assets		295	321
Regulatory assets		12	7
Regulatory assets		283	314
Remaining Amounts of Regulatory Assets for which No Return on Investment During Recovery Period is Provided		$ 168	190
Sierra Pacific Power Company [Member] | Employee benefit plans
Regulatory Assets [Line Items]
Regulatory Asset, Amortization Period	[1]	8 years
Total regulatory assets	[1]	$ 107	132
Sierra Pacific Power Company [Member] | Merger costs from 1999 merger
Regulatory Assets [Line Items]
Regulatory Asset, Amortization Period		27 years
Total regulatory assets		$ 71	74
Sierra Pacific Power Company [Member] | Abandoned projects
Regulatory Assets [Line Items]
Regulatory Asset, Amortization Period		7 years
Total regulatory assets		$ 24	29
Sierra Pacific Power Company [Member] | Deferred Operating Costs
Regulatory Assets [Line Items]
Regulatory Asset, Amortization Period		12 years
Total regulatory assets		$ 23	15
Sierra Pacific Power Company [Member] | Losses on reacquired debt
Regulatory Assets [Line Items]
Regulatory Asset, Amortization Period		15 years
Total regulatory assets		$ 17	19
Sierra Pacific Power Company [Member] | Other
Regulatory Assets [Line Items]
Regulatory asset amortization period years		Various
Total regulatory assets		$ 53	$ 52
[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, 2019	Dec. 31, 2018	Dec. 31, 2017
Regulatory Liabilities [Line Items]
Regulatory Liabilities		$ 7,311	$ 7,506
Regulatory liabilities		211	160
Regulatory liabilities		$ 7,100	$ 7,346
Federal statutory income tax rate		21.00%	21.00%	35.00%
Cost of removal
Regulatory Liabilities [Line Items]
Regulatory liability amortization period years	[1]	26.8240506329114
Regulatory Liabilities	[1]	$ 2,370	$ 2,426
Other
Regulatory Liabilities [Line Items]
Regulatory liability amortization period years		Various
Regulatory Liabilities		$ 713	577
Sierra Pacific Power Company [Member]
Regulatory Liabilities [Line Items]
Regulatory Liabilities		538	509
Regulatory liabilities		49	18
Regulatory liabilities		$ 489	$ 491
Federal statutory income tax rate		21.00%	21.00%	35.00%
Sierra Pacific Power Company [Member] | Deferred income taxes
Regulatory Liabilities [Line Items]
Regulatory liability amortization period years	[2]	Various
Regulatory Liabilities	[2]	$ 263	$ 270
Sierra Pacific Power Company [Member] | Cost of removal
Regulatory Liabilities [Line Items]
Regulatory Liability, Amortization Period	[3]	38 years
Regulatory Liabilities	[3]	$ 217	210
Sierra Pacific Power Company [Member] | Other
Regulatory Liabilities [Line Items]
Regulatory liability amortization period years		Various
Regulatory Liabilities		$ 58	$ 29
[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	Dec. 31, 2019	Dec. 31, 2018
General Rate Case [Member]
Public Utilities, General Disclosures [Line Items]
Public Utilities, Approved Rate Increase (Decrease), Amount		$ 5
Public Utilities, Revenue Sharing, Percent		50.00%
Public Utilities, Approved Return on Equity, Percentage		10.00%
General Rate Case [Member] | Forecast [Member]
Public Utilities, General Disclosures [Line Items]
Public Utilities, Approved Rate Increase (Decrease), Amount	$ 3
Energy Efficiency Rate Case [Member]
Public Utilities, General Disclosures [Line Items]
Customer Refund Liability, Current		$ 2	$ 2

Investments and Restricted Ca_3

Investments and Restricted Cash and Investments (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Investments [Abstract]
Investments	$ 1,719	$ 1,974
Gain (Loss) on Investments	(288)	(538)	$ 14
Marketable Securities, Realized Gain (Loss)	2	2
Marketable Securities, Unrealized Gain (Loss)		(540)
Equity Method Investments [Abstract]
Tax Equity Contributions	1,619	698	$ 403
Purchase Obligation, Due in Next Twelve Months	2,400
Equity method investments	3,947	2,440
Restricted Cash and Investments [Abstract]
Restricted cash and investments	829	760
Investments, including equity method and restricted cash and investments	6,495	5,174
Investments, including equity method and restricted cash and investments, noncurrent	6,255	4,903
Investments, including equity method and restricted cash and investments, current	240	271
Quad Cities Station nuclear decommissioning trust funds [Member]
Restricted Cash and Investments [Abstract]
Decommissioning Fund Investments, Fair Value	599	504
Restricted Cash and Investments, Other [Member]
Restricted Cash and Investments [Abstract]
Restricted cash and investments	230	256
Electric Transmission Texas, LLC [Member]
Equity Method Investments [Abstract]
Equity method investments	$ 555	527
Equity method investment, ownership percentage	50.00%
Bridger Coal Company [Member]
Equity Method Investments [Abstract]
Equity method investments	$ 81	99
Equity method investment, ownership percentage	66.67%
Tax Equity Investments
Equity Method Investments [Abstract]
Equity method investments	$ 3,130	1,661
Other equity method investments [Member]
Equity Method Investments [Abstract]
Equity method investments	181	153
BYD Company Limited common stock [Member]
Investments [Abstract]
Available-for-sale Securities, Equity Securities	1,122	1,435
Rabbi trusts [Member]
Investments [Abstract]
Life Insurance, Corporate or Bank Owned, Amount	410	371
Other investments [Member]
Investments [Abstract]
Other Investments	$ 187	$ 168

Investments and Restricted Ca_4

Investments and Restricted Cash and Investments Investments and Restricted Cash and Investments - MEC - (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Investments, Including Equity Method And Restricted Cash And Investments [Line Items]
Investments, including equity method and restricted cash and investments, noncurrent	$ 6,255	$ 4,903
Nuclear decommissioning trust funds [Member]
Investments, Including Equity Method And Restricted Cash And Investments [Line Items]
Decommissioning Fund Investments, Fair Value	599	504
MidAmerican Energy Company [Member]
Investments, Including Equity Method And Restricted Cash And Investments [Line Items]
Life Insurance, Corporate or Bank Owned, Amount	203	191
Other Investments	16	13
Investments, including equity method and restricted cash and investments, noncurrent	$ 818	$ 708
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%	51.00%
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	31.00%	37.00%
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	10.00%	9.00%
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	$ 599	$ 504

Investments and Restricted Ca_5

Investments and Restricted Cash and Investments - MidAmerican Funding - (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
MidAmerican Funding, LLC and Subsidiaries [Domain]
Investments, Including Equity Method And Restricted Cash And Investments [Line Items]
Life Insurance, Corporate or Bank Owned, Amount	$ 2	$ 2

BHE Debt (Details)

BHE Debt (Details) - USD ($) $ in Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Jun. 30, 2017	Dec. 31, 2016	Dec. 31, 2015
BHE Debt [Line Items]
Current portion of long-term debt		$ 2,539	$ 2,081
Par value		39,634
Noncurrent senior debt		8,231	8,577
BHE junior subordinated debentures		100	100
PacifiCorp [Member]
BHE Debt [Line Items]
Current portion of long-term debt		38	350	$ 586		$ 52	$ 66
Berkshire Hathaway Energy [Member] | BHE Junior Subordinated Debentures, due June 2057 [Member]
BHE Debt [Line Items]
Debt Instrument, Interest Rate, Stated Percentage					5.00%
Conversion of Stock, Shares Converted	181,819
Senior Notes [Member] | Berkshire Hathaway Energy [Member]
BHE Debt [Line Items]
Par value		8,651
Total BHE Senior Debt		8,581	8,577
Current senior debt		350	0
Noncurrent senior debt		$ 8,231	$ 8,577
Senior Notes [Member] | Berkshire Hathaway Energy [Member] | 5.75%, Senior Notes, due 2018 [Member]
BHE Debt [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		0.00%	5.75%
Senior Notes [Member] | Berkshire Hathaway Energy [Member] | 2.00%, Senior Notes, due 2018 [Member]
BHE Debt [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		0.00%	2.00%
Senior Notes [Member] | Berkshire Hathaway Energy [Member] | 2.40% Senior Notes, due 2020 [Member]
BHE Debt [Line Items]
Par value		$ 350
Total BHE Senior Debt		$ 349	$ 349
Debt Instrument, Interest Rate, Stated Percentage		2.40%	2.40%
Senior Notes [Member] | Berkshire Hathaway Energy [Member] | Senior Notes, 2.375%, due 2021 [Member]
BHE Debt [Line Items]
Par value		$ 450
Total BHE Senior Debt		$ 448	$ 448
Debt Instrument, Interest Rate, Stated Percentage		2.375%	2.375%
Senior Notes [Member] | Berkshire Hathaway Energy [Member] | Senior Notes, 2.800%, due 2023 [Member]
BHE Debt [Line Items]
Par value		$ 400
Total BHE Senior Debt		$ 398	$ 398
Debt Instrument, Interest Rate, Stated Percentage		2.80%	2.80%
Senior Notes [Member] | Berkshire Hathaway Energy [Member] | 3.75%, Senior Notes, due 2023 [Member]
BHE Debt [Line Items]
Par value		$ 500
Total BHE Senior Debt		$ 498	$ 498
Debt Instrument, Interest Rate, Stated Percentage		3.75%	3.75%
Senior Notes [Member] | Berkshire Hathaway Energy [Member] | 3.50% Senior Notes, due 2025 [Member]
BHE Debt [Line Items]
Par value		$ 400
Total BHE Senior Debt		$ 398	$ 398
Debt Instrument, Interest Rate, Stated Percentage		3.50%	3.50%
Senior Notes [Member] | Berkshire Hathaway Energy [Member] | Senior Notes, 3.250%, due 2028 [Member]
BHE Debt [Line Items]
Par value		$ 600
Total BHE Senior Debt		$ 594	$ 594
Debt Instrument, Interest Rate, Stated Percentage		3.25%	3.25%
Senior Notes [Member] | Berkshire Hathaway Energy [Member] | 8.48%, Senior Notes, due 2028 [Member]
BHE Debt [Line Items]
Par value		$ 256
Total BHE Senior Debt		$ 259	$ 257
Debt Instrument, Interest Rate, Stated Percentage		8.48%	8.48%
Senior Notes [Member] | Berkshire Hathaway Energy [Member] | 6.125%, Senior Bonds, due 2036 [Member]
BHE Debt [Line Items]
Par value		$ 1,670
Total BHE Senior Debt		$ 1,661	$ 1,661
Debt Instrument, Interest Rate, Stated Percentage		6.125%	6.125%
Senior Notes [Member] | Berkshire Hathaway Energy [Member] | 5.95%, Senior Bonds, due 2037 [Member]
BHE Debt [Line Items]
Par value		$ 550
Total BHE Senior Debt		$ 548	$ 547
Debt Instrument, Interest Rate, Stated Percentage		5.95%	5.95%
Senior Notes [Member] | Berkshire Hathaway Energy [Member] | 6.50%, Senior Bonds, due 2037 [Member]
BHE Debt [Line Items]
Par value		$ 225
Total BHE Senior Debt		$ 223	$ 222
Debt Instrument, Interest Rate, Stated Percentage		6.50%	6.50%
Senior Notes [Member] | Berkshire Hathaway Energy [Member] | 5.15%, Senior Notes, due 2043 [Member]
BHE Debt [Line Items]
Par value		$ 750
Total BHE Senior Debt		$ 740	$ 740
Debt Instrument, Interest Rate, Stated Percentage		5.15%	5.15%
Senior Notes [Member] | Berkshire Hathaway Energy [Member] | 4.50% Senior Notes, due 2045 [Member]
BHE Debt [Line Items]
Par value		$ 750
Total BHE Senior Debt		$ 738	$ 738
Debt Instrument, Interest Rate, Stated Percentage		4.50%	4.50%
Senior Notes [Member] | Berkshire Hathaway Energy [Member] | Senior Notes, 3.80%, due 2048 [Member]
BHE Debt [Line Items]
Par value		$ 750
Total BHE Senior Debt		$ 737	$ 737
Debt Instrument, Interest Rate, Stated Percentage		3.80%	3.80%
Senior Notes [Member] | Berkshire Hathaway Energy [Member] | Senior Notes, 4.45%, due 2049 [Member]
BHE Debt [Line Items]
Par value		$ 1,000
Total BHE Senior Debt		$ 990	$ 990
Debt Instrument, Interest Rate, Stated Percentage		4.45%	4.45%
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]
Par value		$ 100
BHE junior subordinated debentures			$ 100		$ 100
Debt Instrument, Interest Rate, Stated Percentage		5.00%	5.00%
Interest Expense, Debt		$ 5	$ 5

Short-Term Debt and Credit Fa_3

Short-Term Debt and Credit Facilities Short-Term Debt and Credit Facilities - Credit Facilities (Details) £ in Millions, $ in Millions, $ in Millions		Dec. 31, 2019USD ($)		Dec. 31, 2019CAD ($)	Dec. 31, 2019GBP (£)	Dec. 31, 2018USD ($)	Dec. 31, 2017USD ($)	Dec. 31, 2016USD ($)	Dec. 31, 2015USD ($)
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	[1]	$ 9,412				$ 9,114
Short-term debt	[1]	3,214				2,516
Line of Credit Facility, Amounts Supported	[1]	629				543
Line of Credit Facility, Remaining Borrowing Capacity	[1]	5,569				6,055
BHE Renewables [Member]
Line of Credit Facility [Line Items]
Letters of Credit Outstanding, Amount		373				322
HomeServices [Member]
Line of Credit Facility [Line Items]
Short-term debt		318				404
Berkshire Hathaway Energy [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		3,500	[2]			3,500
Short-term debt		1,590				983
Line of Credit Facility, Amounts Supported		0				0
Line of Credit Facility, Remaining Borrowing Capacity		1,910				2,517
PacifiCorp [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		1,200	[2]			1,200
Short-term debt		130				30	$ 80	$ 270	$ 20
Line of Credit Facility, Amounts Supported		256				89
Line of Credit Facility, Remaining Borrowing Capacity		814				1,081
MidAmerican Energy Company and Subsidiaries [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		1,305				1,305
Short-term debt		0				240
Line of Credit Facility, Amounts Supported		370				370
Line of Credit Facility, Remaining Borrowing Capacity		935				695
MidAmerican Funding [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		1,309	[2]			1,309
Short-term debt		0				240
Line of Credit Facility, Amounts Supported		370				370
Line of Credit Facility, Remaining Borrowing Capacity		939				699
NV Energy [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		650	[2]			650
Short-term debt		0				0
Line of Credit Facility, Amounts Supported		0				80
Line of Credit Facility, Remaining Borrowing Capacity		650				570
Northern Powergrid Holdings [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		199	[2]			231
Short-term debt		0				77
Line of Credit Facility, Amounts Supported		0				0
Line of Credit Facility, Remaining Borrowing Capacity		199				154
AltaLink [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		674	[2]			639
Short-term debt		211				345
Line of Credit Facility, Amounts Supported		3				4
Line of Credit Facility, Remaining Borrowing Capacity		460				290
Other [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		1,880	[2]			1,585
Short-term debt		1,283				841
Line of Credit Facility, Amounts Supported		0				0
Line of Credit Facility, Remaining Borrowing Capacity		597				744
Sierra Pacific Power Company [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		250				250
Line of Credit Facility, Amounts Supported		0				80
Line of Credit Facility, Remaining Borrowing Capacity		250				170
Tax exempt bond obligations and commodity contract collateral requirement [Member] | PacifiCorp [Member]
Line of Credit Facility [Line Items]
Letters of Credit Outstanding, Amount		13				184
Certain transactions required by third parties [Member] | PacifiCorp [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Amounts Supported		13				14
Line of Credit [Member] | BHE Renewables [Member]
Line of Credit Facility [Line Items]
Letters of Credit Outstanding, Amount		$ 107				$ 115
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		3.08%		3.08%	3.08%	3.25%
Short-term debt		$ 19				$ 64
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		1.90%		1.90%	1.90%	2.80%
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		2.05%		2.05%	2.05%	2.85%
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] | MidAmerican Funding [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		2.16%		2.16%	2.16%	2.26%
Short-term debt		$ 192				$ 281
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		400
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
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 (Yorkshire) plc [Member]
Line of Credit Facility [Line Items]
Debt to regulated asset value		0.65		0.65	0.65
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
Debt, Weighted Average Interest Rate		3.29%		3.29%	3.29%	3.94%
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
Debt, Weighted Average Interest Rate		3.51%		3.51%	3.51%
Short-term debt		$ 965
Unsecured credit facility, $985 million, expiring January 2019 to December 2019 [Member] | Line of Credit [Member] | HomeServices [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity						$ 985
Debt, Weighted Average Interest Rate						4.42%
Short-term debt						$ 436
Line of Credit [Member] | Secured credit facility, $400 million, expiring June 2022 [Member] | Nevada Power Company [Member]
Line of Credit Facility [Line Items]
Debt To Capitalization Ratio		0.65		0.65	0.65
Line of Credit Facility, Maximum Borrowing Capacity		$ 400
Line of Credit [Member] | Secured credit facility, $250 million, expiring June 2022 [Member] | Sierra Pacific Power Company [Member]
Line of Credit Facility [Line Items]
Debt To Capitalization Ratio		0.65		0.65	0.65
Line of Credit Facility, Maximum Borrowing Capacity		$ 250
[1]	(1)The table does not include unused credit facilities and letters of credit for investments that are accounted for under the equity method.
[2]	(2) Includes the drawn uncommitted credit facilities totaling $39 million at Northern Powergrid.

Short-Term Debt and Credit Fa_4

Short-Term Debt and Credit Faciliites (Details) $ in Millions, $ in Millions		Dec. 31, 2019USD ($)		Dec. 31, 2019CAD ($)	Dec. 31, 2018USD ($)	Dec. 31, 2017USD ($)	Dec. 31, 2016USD ($)	Dec. 31, 2015USD ($)
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	[1]	$ 9,412			$ 9,114
Line of Credit Facility, Amounts Supported	[1]	(629)			(543)
Short-term Debt	[1]	(3,214)			(2,516)
Berkshire Hathaway Energy [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		3,500	[2]		3,500
Line of Credit Facility, Amounts Supported		0			0
Short-term Debt		$ (1,590)			$ (983)
Berkshire Hathaway Energy [Member] | Line of Credit [Member]
Line of Credit Facility [Line Items]
Debt, Weighted Average Interest Rate		1.90%		1.90%	2.80%
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	[2]		$ 1,200
Line of Credit Facility, Amounts Supported		(256)			(89)
Short-term Debt		$ (130)			$ (30)	$ (80)	$ (270)	$ (20)
PacifiCorp [Member] | Line of Credit [Member]
Line of Credit Facility [Line Items]
Debt, Weighted Average Interest Rate		2.05%		2.05%	2.85%
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		$ 1,305			$ 1,305
Line of Credit Facility, Amounts Supported		(370)			(370)
Short-term Debt		$ 0			(240)
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		$ 1,309	[2]		1,309
Line of Credit Facility, Amounts Supported		(370)			(370)
Short-term Debt		$ 0			(240)
MidAmerican Funding [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			250
Line of Credit Facility, Amounts Supported		0			(80)
Northern Powergrid Holdings [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		199	[2]		231
Line of Credit Facility, Amounts Supported		0			0
Short-term Debt		$ 0			$ (77)
AltaLink, L.P. [Member] | Line of Credit [Member]
Line of Credit Facility [Line Items]
Debt, Weighted Average Interest Rate		2.16%		2.16%	2.26%
Debt To Capitalization Ratio		0.75		0.75
Short-term Debt		$ (192)			$ (281)
ALP Investments [Member] | Line of Credit [Member]
Line of Credit Facility [Line Items]
Debt, Weighted Average Interest Rate		3.08%		3.08%	3.25%
Debt To Capitalization Ratio		0.8		0.8
Short-term Debt		$ (19)			$ (64)
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
HomeServices [Member]
Line of Credit Facility [Line Items]
Short-term Debt		$ (318)			(404)
BHE Renewables [Member]
Line of Credit Facility [Line Items]
Letters of Credit Outstanding, Amount		373			322
BHE Renewables [Member] | Line of Credit [Member]
Line of Credit Facility [Line Items]
Letters of Credit Outstanding, Amount		$ 107			115
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
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
Debt, Weighted Average Interest Rate		3.29%		3.29%	3.94%
Unsecured credit facility, $985 million, expiring January 2019 to December 2019 [Member] | HomeServices [Member] | Line of Credit [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity					$ 985
Debt, Weighted Average Interest Rate					4.42%
Short-term Debt					$ (436)
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] | 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
Debt To Capitalization Ratio		0.65		0.65
Tax exempt bond obligations and commodity contract collateral requirement [Member] | PacifiCorp [Member]
Line of Credit Facility [Line Items]
Letters of Credit Outstanding, Amount		$ 13			184
Certain transactions required by third parties [Member] | PacifiCorp [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Amounts Supported		$ (13)			$ (14)
[1]	(1)The table does not include unused credit facilities and letters of credit for investments that are accounted for under the equity method.
[2]	(2) Includes the drawn uncommitted credit facilities totaling $39 million at Northern Powergrid.

Short-Term Debt and Credit Fa_5

Short-Term Debt and Credit Facilities Short-Term Debt (Details) - USD ($) $ in Millions		Dec. 31, 2019		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Short-term Debt [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	[1]	$ 9,412		$ 9,114
Line of Credit Facility, Amounts Supported	[1]	629		543
Short-term debt	[1]	3,214		2,516
Berkshire Hathaway Energy [Member]
Short-term Debt [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		3,500	[2]	3,500
Line of Credit Facility, Amounts Supported		0		0
Short-term debt		1,590		983
PacifiCorp [Member]
Short-term Debt [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		1,200	[2]	1,200
Line of Credit Facility, Amounts Supported		256		89
Short-term debt		130		30	$ 80	$ 270	$ 20
MidAmerican Energy Company and Subsidiaries [Member]
Short-term Debt [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		1,305		1,305
Line of Credit Facility, Amounts Supported		370		370
Short-term debt		$ 0		$ 240
Line of Credit [Member] | Berkshire Hathaway Energy [Member]
Short-term Debt [Line Items]
Debt, Weighted Average Interest Rate		1.90%		2.80%
Line of Credit [Member] | PacifiCorp [Member]
Short-term Debt [Line Items]
Debt, Weighted Average Interest Rate		2.05%		2.85%
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		2.05%		2.85%
Commercial Paper [Member] | MidAmerican Energy Company and Subsidiaries [Member]
Short-term Debt [Line Items]
Short-term debt				$ 240
Short-term Debt, Weighted Average Interest Rate, at Point in Time				2.49%
[1]	(1)The table does not include unused credit facilities and letters of credit for investments that are accounted for under the equity method.
[2]	(2) Includes the drawn uncommitted credit facilities totaling $39 million at Northern Powergrid.

Short-Term Debt and Credit Fa_6

Short-Term Debt and Credit Facilities - PacifiCorp - Credit Facility (Details) $ in Millions		Dec. 31, 2019USD ($)		Dec. 31, 2018USD ($)	Dec. 31, 2017USD ($)	Dec. 31, 2016USD ($)	Dec. 31, 2015USD ($)
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	[1]	$ 9,412		$ 9,114
Short-term Debt	[1]	(3,214)		(2,516)
Line of Credit Facility, Amounts Supported	[1]	(629)		(543)
Line of Credit Facility, Remaining Borrowing Capacity	[1]	5,569		6,055
PacifiCorp [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		1,200	[2]	1,200
Short-term Debt		(130)		(30)	$ (80)	$ (270)	$ (20)
Line of Credit Facility, Amounts Supported		(256)		(89)
Line of Credit Facility, Remaining Borrowing Capacity		$ 814		$ 1,081
PacifiCorp [Member] | Line of Credit [Member]
Line of Credit Facility [Line Items]
Debt, Weighted Average Interest Rate		2.05%		2.85%
Debt To Capitalization Ratio		0.65
PacifiCorp [Member] | Commercial Paper [Member]
Line of Credit Facility [Line Items]
Debt, Weighted Average Interest Rate		2.05%		2.85%
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		(13)		$ (14)
PacifiCorp [Member] | Tax exempt bond obligations and commodity contract collateral requirement [Member]
Line of Credit Facility [Line Items]
Letters of Credit Outstanding, Amount		$ 13		$ 184
[1]	(1)The table does not include unused credit facilities and letters of credit for investments that are accounted for under the equity method.
[2]	(2) Includes the drawn uncommitted credit facilities totaling $39 million at Northern Powergrid.

Short-Term Debt and Credit Fa_7

Short-Term Debt and Credit Facilities - MEC - Credit Facility (Details) $ in Millions		Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	[1]	$ 9,412	$ 9,114
Short-term Debt	[1]	(3,214)	(2,516)
Line of Credit Facility, Amounts Supported	[1]	(629)	(543)
Line of Credit Facility, Remaining Borrowing Capacity	[1]	5,569	6,055
MidAmerican Energy Company [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		1,305	1,305
Short-term Debt		0	(240)
Line of Credit Facility, Amounts Supported		(370)	(370)
Line of Credit Facility, Remaining Borrowing Capacity		$ 935	$ 695
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]
Short-term Debt, Weighted Average Interest Rate, at Point in Time			2.49%
Regulatory Approval for Additional Short-Term Debt Issuances		$ 1,305
Short-term Debt			$ (240)
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		400
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
[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_8

Short-Term Debt and Credit Facilities - MidAmerican Funding (Details) - USD ($) $ in Millions		Dec. 31, 2019	Dec. 31, 2018
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	[1]	$ 9,412	$ 9,114
MidAmerican Funding, LLC and Subsidiaries [Domain] | 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
Outstanding balance on credit facility		$ 0	$ 0
[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_9

Short-Term Debt and Credit Facilities - NPC - Credit Facility (Details)		Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	[1]	$ 9,412,000,000	$ 9,114,000,000
Nevada Power Company [Member] | Line of Credit [Member]
Line of Credit Facility [Line Items]
Long-term Line of Credit		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
Debt To Capitalization Ratio		0.65
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
Nevada Power Company [Member] | Maximum [Member] | Secured credit facility, $400 million, expiring June 2022 [Member] | Line of Credit [Member]
Line of Credit Facility [Line Items]
Debt To Capitalization Ratio		1
[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 F_10

Short-Term Debt and Credit Facilities - SPPC - Credit Facility (Details)		Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	[1]	$ 9,412,000,000	$ 9,114,000,000
Line of Credit Facility, Amounts Supported	[1]	(629,000,000)	(543,000,000)
Line of Credit Facility, Remaining Borrowing Capacity	[1]	5,569,000,000	6,055,000,000
Sierra Pacific Power Company [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		250,000,000	250,000,000
Line of Credit Facility, Amounts Supported		0	(80,000,000)
Line of Credit Facility, Remaining Borrowing Capacity		250,000,000	170,000,000
Sierra Pacific Power Company [Member] | Line of Credit [Member]
Line of Credit Facility [Line Items]
Long-term Line of Credit		0	$ 0
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		$ 250,000,000
Debt To Capitalization Ratio		0.65
Sierra Pacific Power Company [Member] | Secured credit facility, $400 million, expiring June 2022 [Member] | Minimum [Member] | Line of Credit [Member]
Line of Credit Facility [Line Items]
Debt To Capitalization Ratio		0.65
Sierra Pacific Power Company [Member] | Secured credit facility, $400 million, expiring June 2022 [Member] | Maximum [Member] | Line of Credit [Member]
Line of Credit Facility [Line Items]
Debt To Capitalization Ratio		1
[1]	(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) - USD ($) $ in Millions		Dec. 31, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Par value		$ 39,634
Other Long-term Debt, Noncurrent		28,483	$ 25,492
NV Energy [Member]
Debt Instrument [Line Items]
Par value		3,836
Other long-term debt		3,821	3,817
Northern Powergrid Holdings [Member]
Debt Instrument [Line Items]
Par value	[1]	3,234
Other long-term debt		3,221	2,626
Subsidiary Debt [Member]
Debt Instrument [Line Items]
Par value		30,883
Other long-term debt		30,672	27,573
Other Long-term Debt, Current		2,189	2,081
Other Long-term Debt, Noncurrent		28,483	25,492
Subsidiary Debt [Member] | PacifiCorp [Member]
Debt Instrument [Line Items]
Par value		7,705
Other long-term debt		7,658	7,015
Subsidiary Debt [Member] | MidAmerican Funding [Member]
Debt Instrument [Line Items]
Par value		7,515
Other long-term debt		7,427	5,597
Subsidiary Debt [Member] | NV Energy [Member]
Debt Instrument [Line Items]
Par value		3,836
Other long-term debt		3,821	3,817
Subsidiary Debt [Member] | Northern Powergrid Holdings [Member]
Debt Instrument [Line Items]
Par value		3,234
Other long-term debt		3,221	2,626
Subsidiary Debt [Member] | BHE Pipeline Group [Member]
Debt Instrument [Line Items]
Par value		1,250
Other long-term debt		1,247	1,042
Subsidiary Debt [Member] | BHE Transmission [Member]
Debt Instrument [Line Items]
Par value	[2]	3,891
Other long-term debt		3,879	3,842
Subsidiary Debt [Member] | BHE Renewables [Member]
Debt Instrument [Line Items]
Par value		3,239
Other long-term debt		3,206	3,401
Subsidiary Debt [Member] | HomeServices [Member]
Debt Instrument [Line Items]
Par value		213
Other long-term debt		$ 213	$ 233
[1]	(1)The par values for these debt instruments are denominated in sterling.
[2]	ns): Par Value(1) 2019 2018AltaLink Investments, L.P.: Series 12-1 Senior Bonds, 3.674%, due 2019$— $— $148Series 13-1 Senior Bonds, 3.265%, due 2020154 154 148Series 15-1 Senior Bonds, 2.244%, due 2022154 154 146Total AltaLink Investments, L.P.308 308 442 AltaLink, L.P.: Series 2013-2 Notes, 3.621%, due 202096 96 92Series 2012-2 Notes, 2.978%, due 2022212 212 201Series 2013-4 Notes, 3.668%, due 2023385 384 366Series 2014-1 Notes, 3.399%, due 2024269 269 256Series 2016-1 Notes, 2.747%, due 2026269 269 255Series 2006-1 Notes, 5.249%, due 2036115 115 109Series 2010-1 Notes, 5.381%, due 204096 96 91Series 2010-2 Notes, 4.872%, due 2040115 115 109Series 2011-1 Notes, 4.462%, due 2041212 211 201Series 2012-1 Notes, 3.990%, due 2042404 398 380Series 2013-3 Notes, 4.922%, due 2043269 268 256Series 2014-3 Notes, 4.054%, due 2044227 226 215Series 2015-1 Notes, 4.090%, due 2045269 268 255Series 2016-2 Notes, 3.717%, due 2046346 345 328Series 2013-1 Notes, 4.446%, due 2053192 192 183Series 2014-2 Notes, 4.274%, due 2064100 100 95Total AltaLink, L.P.3,576 3,564 3,392 Other: Construction Loan, 5.620%, due 20207 7 8 Total BHE Transmission$3,891 $3,879 $3,842(1)The par values for these debt instruments are denominated in Canadian dollars.

Subsidiary Debt - Maturity Sche

Subsidiary Debt - Maturity Schedule (Details) $ in Millions	Dec. 31, 2019USD ($)
Debt Instrument [Line Items]
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months	$ 2,539
Long-term Debt, Maturities, Repayments of Principal in Year Two	1,308
Long-term Debt, Maturities, Repayments of Principal in Year Three	1,792
Long-term Debt, Maturities, Repayments of Principal in Year Four	2,508
Long-term Debt, Maturities, Repayments of Principal in Year Five	1,615
Long-term Debt, Maturities, Repayments of Principal after Year Five	29,872
Par Value	39,634
Subsidiary Debt [Member]
Debt Instrument [Line Items]
Par Value	30,883
PacifiCorp [Member] | Subsidiary Debt [Member]
Debt Instrument [Line Items]
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months	38
Long-term Debt, Maturities, Repayments of Principal in Year Two	420
Long-term Debt, Maturities, Repayments of Principal in Year Three	605
Long-term Debt, Maturities, Repayments of Principal in Year Four	449
Long-term Debt, Maturities, Repayments of Principal in Year Five	591
Long-term Debt, Maturities, Repayments of Principal after Year Five	5,602
Par Value	7,705
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	0
Long-term Debt, Maturities, Repayments of Principal in Year Four	315
Long-term Debt, Maturities, Repayments of Principal in Year Five	535
Long-term Debt, Maturities, Repayments of Principal after Year Five	6,665
Par Value	7,515
NV Energy [Member]
Debt Instrument [Line Items]
Par Value	3,836
NV Energy [Member] | Subsidiary Debt [Member]
Debt Instrument [Line Items]
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months	890
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	250
Long-term Debt, Maturities, Repayments of Principal in Year Five	0
Long-term Debt, Maturities, Repayments of Principal after Year Five	2,696
Par Value	3,836
Northern Powergrid Holdings [Member]
Debt Instrument [Line Items]
Par Value	3,234	[1]
Northern Powergrid Holdings [Member] | Subsidiary Debt [Member]
Debt Instrument [Line Items]
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months	480
Long-term Debt, Maturities, Repayments of Principal in Year Two	32
Long-term Debt, Maturities, Repayments of Principal in Year Three	498
Long-term Debt, Maturities, Repayments of Principal in Year Four	34
Long-term Debt, Maturities, Repayments of Principal in Year Five	35
Long-term Debt, Maturities, Repayments of Principal after Year Five	2,155
Par Value	3,234
BHE Pipeline Group [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	200
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	1,050
Par Value	1,250
BHE Transmission [Member] | Subsidiary Debt [Member]
Debt Instrument [Line Items]
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months	251
Long-term Debt, Maturities, Repayments of Principal in Year Two	1
Long-term Debt, Maturities, Repayments of Principal in Year Three	366
Long-term Debt, Maturities, Repayments of Principal in Year Four	386
Long-term Debt, Maturities, Repayments of Principal in Year Five	270
Long-term Debt, Maturities, Repayments of Principal after Year Five	2,617
Par Value	3,891	[2]
BHE Renewables [Member] | Subsidiary Debt [Member]
Debt Instrument [Line Items]
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months	503
Long-term Debt, Maturities, Repayments of Principal in Year Two	172
Long-term Debt, Maturities, Repayments of Principal in Year Three	170
Long-term Debt, Maturities, Repayments of Principal in Year Four	174
Long-term Debt, Maturities, Repayments of Principal in Year Five	184
Long-term Debt, Maturities, Repayments of Principal after Year Five	2,036
Par Value	3,239
HomeServices [Member] | Subsidiary Debt [Member]
Debt Instrument [Line Items]
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months	27
Long-term Debt, Maturities, Repayments of Principal in Year Two	33
Long-term Debt, Maturities, Repayments of Principal in Year Three	153
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	213
Berkshire Hathaway Energy [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months	350
Long-term Debt, Maturities, Repayments of Principal in Year Two	450
Long-term Debt, Maturities, Repayments of Principal in Year Three	0
Long-term Debt, Maturities, Repayments of Principal in Year Four	900
Long-term Debt, Maturities, Repayments of Principal in Year Five	0
Long-term Debt, Maturities, Repayments of Principal after Year Five	6,951
Par Value	8,651
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]	(1)The par values for these debt instruments are denominated in sterling.
[2]	ns): Par Value(1) 2019 2018AltaLink Investments, L.P.: Series 12-1 Senior Bonds, 3.674%, due 2019$— $— $148Series 13-1 Senior Bonds, 3.265%, due 2020154 154 148Series 15-1 Senior Bonds, 2.244%, due 2022154 154 146Total AltaLink Investments, L.P.308 308 442 AltaLink, L.P.: Series 2013-2 Notes, 3.621%, due 202096 96 92Series 2012-2 Notes, 2.978%, due 2022212 212 201Series 2013-4 Notes, 3.668%, due 2023385 384 366Series 2014-1 Notes, 3.399%, due 2024269 269 256Series 2016-1 Notes, 2.747%, due 2026269 269 255Series 2006-1 Notes, 5.249%, due 2036115 115 109Series 2010-1 Notes, 5.381%, due 204096 96 91Series 2010-2 Notes, 4.872%, due 2040115 115 109Series 2011-1 Notes, 4.462%, due 2041212 211 201Series 2012-1 Notes, 3.990%, due 2042404 398 380Series 2013-3 Notes, 4.922%, due 2043269 268 256Series 2014-3 Notes, 4.054%, due 2044227 226 215Series 2015-1 Notes, 4.090%, due 2045269 268 255Series 2016-2 Notes, 3.717%, due 2046346 345 328Series 2013-1 Notes, 4.446%, due 2053192 192 183Series 2014-2 Notes, 4.274%, due 2064100 100 95Total AltaLink, L.P.3,576 3,564 3,392 Other: Construction Loan, 5.620%, due 20207 7 8 Total BHE Transmission$3,891 $3,879 $3,842(1)The par values for these debt instruments are denominated in Canadian dollars.

Subsidiary Debt Subsidiary Debt

Subsidiary Debt Subsidiary Debt - Pacificorp (Details) - USD ($) $ in Millions		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Debt Instrument [Line Items]
Current portion of long-term debt		$ 2,539	$ 2,081
Par value		39,634
Long-term Debt		39,353	36,774
PacifiCorp [Member]
Debt Instrument [Line Items]
Current portion of long-term debt		38	350	$ 586	$ 52	$ 66
Long-term Debt, Excluding Current Maturities		7,620	6,665	$ 6,419	$ 7,000	$ 7,048
Long-term Debt		7,658	7,015
Maximum amount of additional long-term debt approved by regulators		1,000
Eligible Property Subject To Lien Of Mortgages		29,000
PacifiCorp [Member] | Letters of credit supporting tax-exempt bond obligations [Member]
Debt Instrument [Line Items]
Letters of Credit Outstanding, Amount			$ 170
PacifiCorp [Member] | First Mortgage Bonds, 2.95% To 8.53%, Due Through 2024 [Member]
Debt Instrument [Line Items]
Par value		$ 1,899
Long-term Debt, Weighted Average Interest Rate, at Point in Time		4.09%	4.31%
PacifiCorp [Member] | First Mortgage Bonds, 2.95% To 8.53%, Due Through 2024 [Member] | Minimum [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		2.95%	2.95%
PacifiCorp [Member] | First Mortgage Bonds, 2.95% To 8.53%, Due Through 2024 [Member] | Maximum [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		8.53%	8.53%
PacifiCorp [Member] | First Mortgage Bonds, 3.35% To 6.71%, Due 2025 to 2026 [Member]
Debt Instrument [Line Items]
Par value		$ 350
Long-term Debt, Weighted Average Interest Rate, at Point in Time		4.31%	4.31%
PacifiCorp [Member] | First Mortgage Bonds, 3.35% To 6.71%, Due 2025 to 2026 [Member] | Minimum [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		3.35%	3.35%
PacifiCorp [Member] | First Mortgage Bonds, 3.35% To 6.71%, Due 2025 to 2026 [Member] | Maximum [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		6.71%	6.71%
PacifiCorp [Member] | First Mortgage Bonds, 3.50% to 7.70%, Due 2029 to 2031 [Member]
Debt Instrument [Line Items]
Par value		$ 700
Long-term Debt, Weighted Average Interest Rate, at Point in Time		5.30%	7.70%
Debt Instrument, Interest Rate, Stated Percentage			7.70%
PacifiCorp [Member] | First Mortgage Bonds, 3.50% to 7.70%, Due 2029 to 2031 [Member] | Minimum [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		3.50%
PacifiCorp [Member] | First Mortgage Bonds, 3.50% to 7.70%, Due 2029 to 2031 [Member] | Maximum [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		7.70%	7.70%
PacifiCorp [Member] | First Mortgage Bonds, 5.25% To 6.35%, Due 2034 to 2038 [Member]
Debt Instrument [Line Items]
Par value		$ 2,350
Long-term Debt, Weighted Average Interest Rate, at Point in Time		5.96%	5.96%
PacifiCorp [Member] | First Mortgage Bonds, 5.25% To 6.35%, Due 2034 to 2038 [Member] | Minimum [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		5.25%	5.25%
PacifiCorp [Member] | First Mortgage Bonds, 5.25% To 6.35%, Due 2034 to 2038 [Member] | Maximum [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		6.35%	6.35%
PacifiCorp [Member] | First Mortgage Bonds, 4.10% To 6.00%, Due 2039 To 2042 [Member]
Debt Instrument [Line Items]
Par value		$ 950
Long-term Debt, Weighted Average Interest Rate, at Point in Time		5.40%	5.40%
PacifiCorp [Member] | First Mortgage Bonds, 4.10% To 6.00%, Due 2039 To 2042 [Member] | Minimum [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		4.10%	4.10%
PacifiCorp [Member] | First Mortgage Bonds, 4.10% To 6.00%, Due 2039 To 2042 [Member] | Maximum [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		6.00%	6.00%
PacifiCorp [Member] | First Mortgage Bonds, 4.13% to 4.15%, Due 2049 to 2050 [Member]
Debt Instrument [Line Items]
Par value		$ 1,200
Long-term Debt, Weighted Average Interest Rate, at Point in Time		4.14%	4.13%
Debt Instrument, Interest Rate, Stated Percentage			4.13%
PacifiCorp [Member] | First Mortgage Bonds, 4.13% to 4.15%, Due 2049 to 2050 [Member] | Minimum [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		4.13%
PacifiCorp [Member] | First Mortgage Bonds, 4.13% to 4.15%, Due 2049 to 2050 [Member] | Maximum [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		4.15%
PacifiCorp [Member] | Tax-exempt bond obligations, variable rate series, due 2020 [Member]
Debt Instrument [Line Items]
Par value		$ 38
Long-term Debt, Weighted Average Interest Rate, at Point in Time		1.78%	1.85%
PacifiCorp [Member] | Tax-exempt bond obligations, variable rate series, due 2025 [Member]
Debt Instrument [Line Items]
Par value	[1]	$ 25
Long-term Debt, Weighted Average Interest Rate, at Point in Time	[1]	1.75%	1.75%
PacifiCorp [Member] | Variable-rate tax-exempt obligation series due 2024 [Member]
Debt Instrument [Line Items]
Par value	[1],[2]	$ 143
Long-term Debt, Weighted Average Interest Rate, at Point in Time	[1],[2]	1.73%	1.68%
PacifiCorp [Member] | Variable-rate tax-exempt obligation series due 2024 to 2025 [Member]
Debt Instrument [Line Items]
Par value	[2]	$ 50
Long-term Debt, Weighted Average Interest Rate, at Point in Time	[2]	1.63%	1.75%
PacifiCorp [Member] | Long-term Debt [Member]
Debt Instrument [Line Items]
Par value		$ 7,705
Long-term Debt		7,658	$ 7,015
PacifiCorp [Member] | PacifiCorp [Member]
Debt Instrument [Line Items]
Par value		7,705
Other long-term debt		7,658	7,015
PacifiCorp [Member] | PacifiCorp [Member] | First Mortgage Bonds, 2.95% To 8.53%, Due Through 2024 [Member]
Debt Instrument [Line Items]
Long-term Debt		1,895	2,244
PacifiCorp [Member] | PacifiCorp [Member] | First Mortgage Bonds, 3.35% To 6.71%, Due 2025 to 2026 [Member]
Debt Instrument [Line Items]
Long-term Debt		349	348
PacifiCorp [Member] | PacifiCorp [Member] | First Mortgage Bonds, 3.50% to 7.70%, Due 2029 to 2031 [Member]
Debt Instrument [Line Items]
Long-term Debt		696	298
PacifiCorp [Member] | PacifiCorp [Member] | First Mortgage Bonds, 5.25% To 6.35%, Due 2034 to 2038 [Member]
Debt Instrument [Line Items]
Long-term Debt		2,338	2,338
PacifiCorp [Member] | PacifiCorp [Member] | First Mortgage Bonds, 4.10% To 6.00%, Due 2039 To 2042 [Member]
Debt Instrument [Line Items]
Long-term Debt		939	939
PacifiCorp [Member] | PacifiCorp [Member] | First Mortgage Bonds, 4.13% to 4.15%, Due 2049 to 2050 [Member]
Debt Instrument [Line Items]
Long-term Debt		1,186	593
PacifiCorp [Member] | PacifiCorp [Member] | Tax-exempt bond obligations, variable rate series, due 2020 [Member]
Debt Instrument [Line Items]
Long-term Debt		38	38
PacifiCorp [Member] | PacifiCorp [Member] | Tax-exempt bond obligations, variable rate series, due 2025 [Member]
Debt Instrument [Line Items]
Long-term Debt	[1]	24	25
PacifiCorp [Member] | PacifiCorp [Member] | Variable-rate tax-exempt obligation series due 2024 [Member]
Debt Instrument [Line Items]
Long-term Debt	[1],[2]	143	142
PacifiCorp [Member] | PacifiCorp [Member] | Variable-rate tax-exempt obligation series due 2024 to 2025 [Member]
Debt Instrument [Line Items]
Long-term Debt	[2]	50	50
Subsidiary Debt [Member]
Debt Instrument [Line Items]
Par value		30,883
Other long-term debt		30,672	27,573
Subsidiary Debt [Member] | PacifiCorp [Member]
Debt Instrument [Line Items]
Par value		7,705
Other long-term debt		$ 7,658	$ 7,015
Subsidiary Debt [Member] | PacifiCorp [Member] | Minimum [Member]
Debt Instrument [Line Items]
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate		1.60%	1.67%
Subsidiary Debt [Member] | PacifiCorp [Member] | Maximum [Member]
Debt Instrument [Line Items]
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate		1.80%	1.85%
Subsidiary Debt [Member] | PacifiCorp [Member] | First Mortgage Bonds, 2.95% To 8.53%, Due Through 2024 [Member] | Minimum [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		2.95%	2.95%
Subsidiary Debt [Member] | PacifiCorp [Member] | First Mortgage Bonds, 2.95% To 8.53%, Due Through 2024 [Member] | Maximum [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		8.53%	8.53%
Subsidiary Debt [Member] | PacifiCorp [Member] | First Mortgage Bonds, 3.35% To 6.71%, Due 2025 to 2026 [Member] | Minimum [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		3.35%	3.35%
Subsidiary Debt [Member] | PacifiCorp [Member] | First Mortgage Bonds, 3.35% To 6.71%, Due 2025 to 2026 [Member] | Maximum [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		6.71%	6.71%
Subsidiary Debt [Member] | PacifiCorp [Member] | First Mortgage Bonds, 5.25% To 6.35%, Due 2034 to 2038 [Member] | Minimum [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		5.25%	5.25%
Subsidiary Debt [Member] | PacifiCorp [Member] | First Mortgage Bonds, 5.25% To 6.35%, Due 2034 to 2038 [Member] | Maximum [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		6.35%	6.35%
Subsidiary Debt [Member] | PacifiCorp [Member] | First Mortgage Bonds, 4.10% To 6.00%, Due 2039 To 2042 [Member] | Minimum [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		4.10%	4.10%
Subsidiary Debt [Member] | PacifiCorp [Member] | First Mortgage Bonds, 4.10% To 6.00%, Due 2039 To 2042 [Member] | Maximum [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		6.00%	6.00%
Subsidiary Debt [Member] | PacifiCorp [Member] | First Mortgage Bonds, 4.13% to 4.15%, Due 2049 to 2050 [Member] | Minimum [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage
[1]	Supported by $170 million of fully available letters of credit issued under committed bank arrangements as of December 31, 2018. These arrangements were canceled in 2019.
[2]	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 Subsidiary De_2

Subsidiary Debt Subsidiary Debt - PacifiCorp - Annual Payment on Long-Term Debt (Details) - USD ($) $ in Millions		Dec. 31, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months		$ 2,539
Capital Leases, Future Minimum Payments Due, Next Twelve Months	[1]		$ 69
Long-term Debt, Maturities, Repayments of Principal in Year Two		1,308
Capital Leases, Future Minimum Payments Due in Two Years	[1]		68
Long-term Debt, Maturities, Repayments of Principal in Year Three		1,792
Capital Leases, Future Minimum Payments Due in Three Years	[1]		73
Long-term Debt, Maturities, Repayments of Principal in Year Four		2,508
Capital Leases, Future Minimum Payments Due in Four Years	[1]		67
Long-term Debt, Maturities, Repayments of Principal in Year Five		1,615
Capital Leases, Future Minimum Payments Due in Five Years	[1]		56
Long-term Debt, Maturities, Repayments of Principal after Year Five		29,872
Capital Leases, Future Minimum Payments Due Thereafter	[1]		772
Par value		39,634
Capital Leases, Future Minimum Payments Due	[1]		1,105
Long-term Debt		39,353	36,774
PacifiCorp [Member]
Debt Instrument [Line Items]
Capital Leases, Future Minimum Payments Due, Next Twelve Months	[2]		4
Capital Leases, Future Minimum Payments Due in Two Years	[2]		4
Capital Leases, Future Minimum Payments Due in Three Years	[2]		7
Capital Leases, Future Minimum Payments Due in Four Years	[2]		3
Capital Leases, Future Minimum Payments Due in Five Years	[2]		2
Capital Leases, Future Minimum Payments Due Thereafter	[2]		16
Capital Leases, Future Minimum Payments Due	[2]		36
Long-term Debt		7,658	$ 7,015
PacifiCorp [Member] | Long-term Debt [Member]
Debt Instrument [Line Items]
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months		38
Long-term Debt, Maturities, Repayments of Principal in Year Two		420
Long-term Debt, Maturities, Repayments of Principal in Year Three		605
Long-term Debt, Maturities, Repayments of Principal in Year Four		449
Long-term Debt, Maturities, Repayments of Principal in Year Five		591
Long-term Debt, Maturities, Repayments of Principal after Year Five		5,602
Par value		7,705
Debt Instrument, Unamortized Premium, Discount and Debt Issuance Cost		(47)
Long-term Debt		$ 7,658
[1]	Amounts included for comparability and accounted for in accordance with ASC Topic 840, "Leases".
[2]	(1) Amounts included for comparability and accounted for in accordance with ASC 840, "Leases".

Subsidiary Debt Subsidiary De_3

Subsidiary Debt Subsidiary Debt - MEC (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Par value	$ 39,634
Restricted Cash and Cash Equivalents, Current	212	$ 227
MidAmerican Energy Company [Member]
Debt Instrument [Line Items]
Par value	7,276
Restricted Cash and Cash Equivalents, Current	43	56
Other long-term debt	7,208	$ 5,379
Eligible Property Subject To Lien Of Mortgages	20,000
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	$ 864
Debt Instrument, Interest Rate, Stated Percentage	3.65%	0.00%
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	$ 872
Debt Instrument, Interest Rate, Stated Percentage	4.25%	0.00%
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	$ 591
Debt Instrument, Interest Rate, Stated Percentage	3.15%	0.00%
MidAmerican Energy Company [Member] | MEC First Mortgage Bonds, 2.40%, Due March 2019 [Member]
Debt Instrument [Line Items]
Par value	$ 0
Other long-term debt	0	$ 500
Debt Instrument, Interest Rate, Stated Percentage		2.40%
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%	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	$ 500
Debt Instrument, Interest Rate, Stated Percentage	3.50%	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	$ 372
Debt Instrument, Interest Rate, Stated Percentage	3.10%	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%	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%	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%	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%	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	$ 688	$ 688
Debt Instrument, Interest Rate, Stated Percentage	3.65%	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	$ 396	$ 396
Debt Instrument, Interest Rate, Stated Percentage	6.75%	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%	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	$ 347
Debt Instrument, Interest Rate, Stated Percentage	5.80%	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	$ 5
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	1.66%
MidAmerican Energy Company [Member] | MEC Transmission Upgrade Obligation, 4.449%, Due Through 2035 [Member]
Debt Instrument [Line Items]
Vendor Financing, Discount Rate Applied		4.45%
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		1.74%
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	$ 2,000
MidAmerican Energy Company [Member] | Common Equity Level To Total Capitalization [Member]
Debt Instrument [Line Items]
Common Equity Level To Total Capitalization	51.00%
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%	3.42%
MidAmerican Energy Company [Member] | Variable Rate Tax Exempt Obligation Series Due 2047 [Member]
Debt Instrument [Line Items]
Restricted Cash and Cash Equivalents, Current	$ 32

Subsidiary Debt Subsidiary De_4

Subsidiary Debt Subsidiary Debt - MEC - Maturity Schedule (Details) $ in Millions	Dec. 31, 2019USD ($)
Debt Instrument [Line Items]
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months	$ 2,539
Long-term Debt, Maturities, Repayments of Principal in Year Two	1,308
Long-term Debt, Maturities, Repayments of Principal in Year Three	1,792
Long-term Debt, Maturities, Repayments of Principal in Year Four	2,508
Long-term Debt, Maturities, Repayments of Principal in Year Five	1,615
Long-term Debt, Maturities, Repayments of Principal after Year Five	29,872
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	1
Long-term Debt, Maturities, Repayments of Principal in Year Four	315
Long-term Debt, Maturities, Repayments of Principal in Year Five	535
Long-term Debt, Maturities, Repayments of Principal after Year Five	$ 6,425

Subsidiary Debt - MidAmerican F

Subsidiary Debt - MidAmerican Funding (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Par value	$ 39,634
Equity Restrictions	18,100
Subsidiary Debt [Member]
Debt Instrument [Line Items]
Par value	30,883
Other long-term debt	30,672	$ 27,573
MidAmerican Funding [Member] | Subsidiary Debt [Member]
Debt Instrument [Line Items]
Par value	7,515
Other long-term debt	7,427	5,597
MidAmerican Energy Company [Member]
Debt Instrument [Line Items]
Par value	7,276
Other long-term debt	7,208	$ 5,379
Eligible Property Subject To Lien Of Mortgages	20,000
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	$ 864
Debt Instrument, Interest Rate, Stated Percentage	3.65%	0.00%
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	$ 872
Debt Instrument, Interest Rate, Stated Percentage	4.25%	0.00%
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	$ 591
Debt Instrument, Interest Rate, Stated Percentage	3.15%	0.00%
MidAmerican Energy Company [Member] | MEC First Mortgage Bonds, 2.40%, Due March 2019 [Member]
Debt Instrument [Line Items]
Par value	$ 0
Other long-term debt	0	$ 500
Debt Instrument, Interest Rate, Stated Percentage		2.40%
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%	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	$ 500
Debt Instrument, Interest Rate, Stated Percentage	3.50%	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	$ 372
Debt Instrument, Interest Rate, Stated Percentage	3.10%	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%	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%	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%	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%	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	$ 688	$ 688
Debt Instrument, Interest Rate, Stated Percentage	3.65%	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	$ 396	$ 396
Debt Instrument, Interest Rate, Stated Percentage	6.75%	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%	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	$ 347
Debt Instrument, Interest Rate, Stated Percentage	5.80%	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	$ 5
MidAmerican Funding, LLC and Subsidiaries [Domain]
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	$ 219	$ 217
Debt Instrument, Interest Rate, Stated Percentage	6.927%	6.927%
MidAmerican Energy Company [Member] | MidAmerican Funding [Member] | Subsidiary Debt [Member]
Debt Instrument [Line Items]
Par value	$ 7,276
Other long-term debt	7,208	$ 5,380
Eligible Property Subject To Lien Of Mortgages	20,000
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	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	1.66%	1.74%
MidAmerican Energy Company [Member] | MidAmerican Funding [Member] | Subsidiary Debt [Member] | MEC First Mortgage Bonds, 2.40%, Due March 2019 [Member]
Debt Instrument [Line Items]
Par value	$ 0
Other long-term debt	$ 0	$ 500
Debt Instrument, Interest Rate, Stated Percentage	2.40%	2.40%
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%	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%	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	$ 372
Debt Instrument, Interest Rate, Stated Percentage	3.10%	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%	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	$ 394
Debt Instrument, Interest Rate, Stated Percentage	4.40%	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%	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%	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	$ 688	$ 688
Debt Instrument, Interest Rate, Stated Percentage	3.65%	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	$ 396	$ 396
Debt Instrument, Interest Rate, Stated Percentage	6.75%	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%	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%	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	$ 5
Vendor Financing, Discount Rate Applied
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
Extinguishment of Debt, Gain (Loss), Net of Tax		$ 29
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%	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%	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%	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		Mar. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Par value			$ 39,634
Subsidiary Debt [Member]
Debt Instrument [Line Items]
Par value			30,883
Other long-term debt			30,672	$ 27,573
PacifiCorp [Member] | Subsidiary Debt [Member]
Debt Instrument [Line Items]
Par value			7,705
Other long-term debt			7,658	7,015
Northern Powergrid Holdings [Member]
Debt Instrument [Line Items]
Par value	[1]		3,234
Other long-term debt			3,221	2,626
Northern Powergrid Holdings [Member] | European Investment Bank loans, 2.564%, due 2027 [Member]
Debt Instrument [Line Items]
Par value	[1]		332
Other long-term debt			330	318
Northern Powergrid Holdings [Member] | Subsidiary Debt [Member]
Debt Instrument [Line Items]
Par value			3,234
Other long-term debt			$ 3,221	$ 2,626
Northern Powergrid Holdings [Member] | Subsidiary Debt [Member] | European Investment Bank loans, 2.564%, due 2027 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage			2.564%	2.564%
MidAmerican Funding [Member] | Subsidiary Debt [Member]
Debt Instrument [Line Items]
Par value			$ 7,515
Other long-term debt			7,427	$ 5,597
NV Energy [Member]
Debt Instrument [Line Items]
Par value			3,836
Other long-term debt			3,821	3,817
NV Energy [Member] | Subsidiary Debt [Member]
Debt Instrument [Line Items]
Par value			3,836
Other long-term debt			3,821	3,817
BHE Pipeline Group [Member]
Debt Instrument [Line Items]
Par value			1,250
Other long-term debt			1,247	1,042
BHE Renewables [Member] | Subsidiary Debt [Member]
Debt Instrument [Line Items]
Par value			3,239
Other long-term debt			3,206	3,401
BHE Renewables [Member] | Subsidiary Debt [Member] | Marshall Wind term loan, variable interest rate, due 2026 [Member]
Debt Instrument [Line Items]
Par value	[2],[3]		77
Other long-term debt	[2],[3]		75	81
BHE Renewables [Member] | Subsidiary Debt [Member] | Grande Prairie Wind, Senior Notes, 3.860%, due 2037 [Member]
Debt Instrument [Line Items]
Par value	[2]		358
Other long-term debt			355	392
BHE Renewables [Member] | Subsidiary Debt [Member] | Topaz Solar Farms Senior Notes, 4.875%, due September 2015 through September 2039 [Member]
Debt Instrument [Line Items]
Par value	[2]		195
Other long-term debt	[2]		193	205
HomeServices [Member] | Subsidiary Debt [Member]
Debt Instrument [Line Items]
Par value			213
Other long-term debt			$ 213	$ 233
HomeServices [Member] | Subsidiary Debt [Member] | Variable-rate Term Loan - Due 2022 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage			3.299%	4.022%
Minimum [Member] | PacifiCorp [Member] | Subsidiary Debt [Member]
Debt Instrument [Line Items]
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate			1.60%	1.67%
Minimum [Member] | PacifiCorp [Member] | Subsidiary Debt [Member] | First Mortgage Bonds, 4.10% To 6.00%, Due 2039 To 2042 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage			4.10%	4.10%
Minimum [Member] | PacifiCorp [Member] | Subsidiary Debt [Member] | First Mortgage Bonds, 2.95% To 8.53%, Due 2018 Through 2024 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage			2.95%	2.95%
Minimum [Member] | PacifiCorp [Member] | Subsidiary Debt [Member] | First Mortgage Bonds, 3.35% To 6.71%, Due 2024 to 2026 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage			3.35%	3.35%
Minimum [Member] | PacifiCorp [Member] | Subsidiary Debt [Member] | First Mortgage Bonds, 4.125%, Due 2049 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage
Maximum [Member] | PacifiCorp [Member] | Subsidiary Debt [Member]
Debt Instrument [Line Items]
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate			1.80%	1.85%
Maximum [Member] | PacifiCorp [Member] | Subsidiary Debt [Member] | First Mortgage Bonds, 4.10% To 6.00%, Due 2039 To 2042 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage			6.00%	6.00%
Maximum [Member] | PacifiCorp [Member] | Subsidiary Debt [Member] | First Mortgage Bonds, 2.95% To 8.53%, Due 2018 Through 2024 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage			8.53%	8.53%
Maximum [Member] | PacifiCorp [Member] | Subsidiary Debt [Member] | First Mortgage Bonds, 3.35% To 6.71%, Due 2024 to 2026 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage			6.71%	6.71%
MidAmerican Energy Company [Member] | MidAmerican Funding [Member] | Subsidiary Debt [Member]
Debt Instrument [Line Items]
Par value			$ 7,276
Other long-term debt			7,208	$ 5,380
Eligible Property Subject To Lien Of Mortgages			20,000
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			1.66%	1.74%
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%	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%	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%	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	$ 372
Debt Instrument, Interest Rate, Stated Percentage			3.10%	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			$ 688	$ 688
Debt Instrument, Interest Rate, Stated Percentage			3.65%	3.65%
NV Energy, Inc. [Member] | NV Energy [Member] | Senior Notes, 6.250%, due 2020 [Member]
Debt Instrument [Line Items]
Par value			$ 315
Other long-term debt			$ 321	$ 330
NV Energy, Inc. [Member] | NV Energy [Member] | Subsidiary Debt [Member] | Senior Notes, 6.250%, due 2020 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage			6.25%	6.25%
Nevada Power Company [Member]
Debt Instrument [Line Items]
Par value			$ 2,384
Eligible Property Subject To Lien Of Mortgages			8,700
Nevada Power Company [Member] | NV Energy [Member]
Debt Instrument [Line Items]
Par value			2,384
Other long-term debt			2,364	$ 2,366
Nevada Power Company [Member] | NV Energy [Member] | Mortgage Securities, 7.125%, Series V due 2019 [Member]
Debt Instrument [Line Items]
Par value			0
Other long-term debt				500
Nevada Power Company [Member] | NV Energy [Member] | Mortgage Securities, 2.750%, Series BB due 2020 [Member]
Debt Instrument [Line Items]
Par value			575
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
Other long-term debt			360	360
Nevada Power Company [Member] | NV Energy [Member] | Mortgage Securities, 6.750%, Series R due 2037 [Member]
Debt Instrument [Line Items]
Par value			349
Other long-term debt			348	348
Nevada Power Company [Member] | NV Energy [Member] | Mortgage Securities, 5.375%, Series X due 2040 [Member]
Debt Instrument [Line Items]
Par value			250
Other long-term debt			249	248
Nevada Power Company [Member] | NV Energy [Member] | Mortgage Securities, 5.450%, Series Y due 2041 [Member]
Debt Instrument [Line Items]
Par value			250
Other long-term debt			245	$ 244
Nevada Power Company [Member] | NV Energy [Member] | NPC Pollution Control Refunding Revenue Bonds, 1.80%, Series 2017A, due 2032 [Member]
Debt Instrument [Line Items]
Par value	[4]		40
Nevada Power Company [Member] | NV Energy [Member] | NPC Pollution Control Refunding Revenue Bonds, 1.60%, Series 2017, Due 2036 [Member]
Debt Instrument [Line Items]
Par value	[4]		40
Nevada Power Company [Member] | NV Energy [Member] | NPC Pollution Control Refunding Revenue Bonds, 1.60%, Series 2017B, due 2039 [Member]
Debt Instrument [Line Items]
Par value	[4]		13
Nevada Power Company [Member] | NV Energy [Member] | Subsidiary Debt [Member]
Debt Instrument [Line Items]
Par value			$ 2,384
Nevada Power Company [Member] | NV Energy [Member] | Subsidiary Debt [Member] | Mortgage Securities, 7.125%, Series V due 2019 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage			7.125%	7.125%
Nevada Power Company [Member] | NV Energy [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%
Nevada Power Company [Member] | NV Energy [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%	0.00%
Nevada Power Company [Member] | NV Energy [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%
Nevada Power Company [Member] | NV Energy [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%
Nevada Power Company [Member] | NV Energy [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%
Nevada Power Company [Member] | NV Energy [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%
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			1.80%	1.80%
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]
Debt Instrument, Interest Rate, Stated Percentage			1.60%	1.60%
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]
Debt Instrument, Interest Rate, Stated Percentage			1.60%	1.60%
Sierra Pacific Power Company [Member]
Debt Instrument [Line Items]
Eligible Property Subject To Lien Of Mortgages			$ 4,200
Sierra Pacific Power Company [Member] | NV Energy [Member]
Debt Instrument [Line Items]
Par value			1,137
Other long-term debt			1,136	$ 1,121
Sierra Pacific Power Company [Member] | NV Energy [Member] | Mortgage securities, 3.375%, Series T due 2023 [Member]
Debt Instrument [Line Items]
Par value			250
Other long-term debt			249	249
Sierra Pacific Power Company [Member] | NV Energy [Member] | Mortgage securities, 2.600%, Series U due 2026 [Member]
Debt Instrument [Line Items]
Par value			400
Other long-term debt			396	396
Sierra Pacific Power Company [Member] | NV Energy [Member] | Mortgage securities, 6.750%, Series P due 2037 [Member]
Debt Instrument [Line Items]
Par value			252
Other long-term debt			256	256
Sierra Pacific Power Company [Member] | NV Energy [Member] | Pollution Control Refunding Revenue Bonds, 1.250%, Series 2016A, due 2029 [Member]
Debt Instrument [Line Items]
Par value			0
Other long-term debt				20
Sierra Pacific Power Company [Member] | NV Energy [Member] | Gas facilities refunding revenue bonds, 1.500%, series 2016A, due 2031 [Member]
Debt Instrument [Line Items]
Par value			0
Other long-term debt				58
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	[5]		60
Other long-term debt				62
Sierra Pacific Power Company [Member] | NV Energy [Member] | Water facilities refunding revenue bonds, series 2016C, due 2036 [Member]
Debt Instrument [Line Items]
Par value	[6]		0
Other long-term debt				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	[7],[8]		25
Other long-term debt				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	[7],[8]		$ 25
Other long-term debt				$ 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]
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]
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]
Debt Instrument, Interest Rate, Stated Percentage			6.75%	6.75%
Sierra Pacific Power Company [Member] | NV Energy [Member] | Subsidiary Debt [Member] | Pollution Control Refunding Revenue Bonds, 1.250%, Series 2016A, due 2029 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage			1.25%	1.25%
Sierra Pacific Power Company [Member] | NV Energy [Member] | Subsidiary Debt [Member] | Gas facilities refunding revenue bonds, 1.500%, series 2016A, due 2031 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage			1.50%	1.50%
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]
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]
Debt Instrument, Interest Rate, Stated Percentage			1.85%
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]
Debt Instrument, Interest Rate, Stated Percentage			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]
Debt Instrument, Interest Rate, Stated Percentage			2.05%
Sierra Pacific Power Company [Member] | Minimum [Member] | NV Energy [Member] | Subsidiary Debt [Member] | Water facilities refunding revenue bonds, series 2016C, due 2036 [Member]
Debt Instrument [Line Items]
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate				1.75%
Sierra Pacific Power Company [Member] | Minimum [Member] | NV Energy [Member] | Subsidiary Debt [Member] | Water facilities refunding revenue bonds, series 2016D, due 2036 [Member]
Debt Instrument [Line Items]
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate				1.75%
Sierra Pacific Power Company [Member] | Minimum [Member] | NV Energy [Member] | Subsidiary Debt [Member] | Water facilities refunding revenue bonds, series 2016E, due 2036 [Member]
Debt Instrument [Line Items]
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate				1.75%
Sierra Pacific Power Company [Member] | Maximum [Member] | NV Energy [Member] | Subsidiary Debt [Member] | Water facilities refunding revenue bonds, series 2016C, due 2036 [Member]
Debt Instrument [Line Items]
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate				1.82%
Sierra Pacific Power Company [Member] | Maximum [Member] | NV Energy [Member] | Subsidiary Debt [Member] | Water facilities refunding revenue bonds, series 2016D, due 2036 [Member]
Debt Instrument [Line Items]
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate				1.82%
Sierra Pacific Power Company [Member] | Maximum [Member] | NV Energy [Member] | Subsidiary Debt [Member] | Water facilities refunding revenue bonds, series 2016E, due 2036 [Member]
Debt Instrument [Line Items]
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate				1.82%
Subsequent Event [Member] | 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		$ 575
Debt Instrument, Interest Rate, Stated Percentage		2.75%
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%
[1]	(1)The par values for these debt instruments are denominated in sterling.
[2]	(1)Amortizes quarterly or semiannually.
[3]	(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 75% of the Pinyon Pines outstanding debt through December 31, 2019 and 50% of the Pinyon Pines outstanding debt thereafter, and 100% of the TX Jumbo Road and Marshall Wind outstanding debt. The variable interest rate as of December 31, 2019 and 2018 was 3.69% and 4.55%, respectively, while the fixed interest rates as of December 31, 2019 and 2018 ranged from 3.21% to 5.41%.
[4]	(1)Subject to mandatory purchase by Nevada Power in May 2020 at which date the interest rate may be adjusted from time to time.
[5]	(2)Subject to mandatory purchase by Sierra Pacific in June 2022 at which date the interest rate may be adjusted from time to time.
[6]	(3)Bond was purchased by Sierra Pacific during 2019. As of December 31, 2018 the bond variable interest rate was 1.750% to 1.820%.
[7]	(4)Bonds were purchased by Sierra Pacific during 2019 and re-offered at a fixed interest rate. As of December 31, 2018 the bonds variable interest rate was 1.750% to 1.820%.
[8]	Subject to mandatory purchase by Sierra Pacific in April 2022 at which date the interest rate may be adjusted from time to time.

Subsidiary Debt Subsidiary De_5

Subsidiary Debt Subsidiary Debt - NPC - Long-Term Debt (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Par value			$ 39,634
Current portion of long-term debt			2,539	$ 2,081
Long-term Debt			39,353	36,774
Subsidiary Debt [Member]
Debt Instrument [Line Items]
Par value			30,883
Nevada Power Company [Member]
Debt Instrument [Line Items]
Par value			2,384
Current portion of long-term debt			575	500
Long-term Debt, Excluding Current Maturities			1,776	1,853
Long-term Debt			2,351	$ 2,353
Nevada Power Company [Member] | Subsidiary Debt [Member]
Debt Instrument [Line Items]
Long-term Debt			2,351
NV Energy [Member]
Debt Instrument [Line Items]
Par value			3,836
NV Energy [Member] | Subsidiary Debt [Member]
Debt Instrument [Line Items]
Par value			3,836
NV Energy [Member] | Nevada Power Company [Member]
Debt Instrument [Line Items]
Par value			2,384
NV Energy [Member] | Nevada Power Company [Member] | Mortgage Securities, 7.125%, Series V due 2019 [Member]
Debt Instrument [Line Items]
Par value			0
NV Energy [Member] | Nevada Power Company [Member] | Mortgage Securities, 2.750%, Series BB due 2020 [Member]
Debt Instrument [Line Items]
Par value			575
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, 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] | NPC Pollution Control Refunding Revenue Bonds, 1.80%, Series 2017A, due 2032 [Member]
Debt Instrument [Line Items]
Par value	[1]		40
NV Energy [Member] | Nevada Power Company [Member] | NPC Pollution Control Refunding Revenue Bonds, 1.60%, Series 2017, Due 2036 [Member]
Debt Instrument [Line Items]
Par value	[1]		40
NV Energy [Member] | Nevada Power Company [Member] | NPC Pollution Control Refunding Revenue Bonds, 1.60%, Series 2017B, due 2039 [Member]
Debt Instrument [Line Items]
Par value	[1]		13
NV Energy [Member] | Nevada Power Company [Member] | Subsidiary Debt [Member]
Debt Instrument [Line Items]
Par value			$ 2,384
NV Energy [Member] | Nevada Power Company [Member] | Subsidiary Debt [Member] | Mortgage Securities, 7.125%, Series V due 2019 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage			7.125%	7.125%
Current portion of long-term debt			$ 0	$ 500
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%
Current portion of long-term debt			$ 575
Long-term Debt				$ 574
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%	0.00%
Long-term Debt			$ 496	$ 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%
Long-term Debt			$ 358	$ 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%
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%
Long-term Debt			$ 248	$ 247
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%
Long-term Debt			$ 237	$ 236
NV Energy [Member] | Nevada Power Company [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			1.80%	1.80%
Long-term Debt	[1]		$ 39	$ 40
NV Energy [Member] | Nevada Power Company [Member] | Subsidiary Debt [Member] | NPC Pollution Control Refunding Revenue Bonds, 1.60%, Series 2017, Due 2036 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage			1.60%	1.60%
Long-term Debt	[1]		$ 39	$ 39
NV Energy [Member] | Nevada Power Company [Member] | Subsidiary Debt [Member] | NPC Pollution Control Refunding Revenue Bonds, 1.60%, Series 2017B, due 2039 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage			1.60%	1.60%
Long-term Debt	[1]		$ 13	$ 13
Subsequent Event [Member] | 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%
Par value		$ 425
Subsequent Event [Member] | 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%
Par value		$ 300
Subsequent Event [Member] | 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%
Early Repayment of Senior Debt		$ 575
Par value		$ 575
[1]	(1)Subject to mandatory purchase by Nevada Power in May 2020 at which date the interest rate may be adjusted from time to time.

Subsidiary Debt Subsidiary De_6

Subsidiary Debt Subsidiary Debt - NPC - Annual Payment on Long-Term Debt (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months	$ 2,539
Long-term Debt, Maturities, Repayments of Principal after Year Five	29,872
Par value	39,634
Long-term Debt	39,353	$ 36,774
Subsidiary Debt [Member]
Debt Instrument [Line Items]
Par value	30,883
Nevada Power Company [Member]
Debt Instrument [Line Items]
Par value	2,384
Long-term Debt	2,351	$ 2,353
Nevada Power Company [Member] | Subsidiary Debt [Member]
Debt Instrument [Line Items]
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months	575
Long-term Debt, Maturities, Repayments of Principal after Year Five	1,809
Debt Instrument, Unamortized Premium, Discount and Debt Issuance Cost	33
Long-term Debt	2,351
NV Energy [Member]
Debt Instrument [Line Items]
Par value	3,836
NV Energy [Member] | Subsidiary Debt [Member]
Debt Instrument [Line Items]
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months	890
Long-term Debt, Maturities, Repayments of Principal after Year Five	2,696
Par value	3,836
NV Energy [Member] | Nevada Power Company [Member]
Debt Instrument [Line Items]
Par value	2,384
NV Energy [Member] | Nevada Power Company [Member] | Subsidiary Debt [Member]
Debt Instrument [Line Items]
Par value	$ 2,384

Subsidiary Debt Subsidiary De_7

Subsidiary Debt Subsidiary Debt - NPC (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Par value		$ 39,634
Long-term Debt		39,353	$ 36,774
Subsidiary Debt [Member]
Debt Instrument [Line Items]
Par value		30,883
Nevada Power Company [Member]
Debt Instrument [Line Items]
Par value		2,384
Eligible Property Subject To Lien Of Mortgages		8,700
Long-term Debt		2,351	$ 2,353
Nevada Power Company [Member] | Subsidiary Debt [Member]
Debt Instrument [Line Items]
Long-term Debt		2,351
NV Energy [Member]
Debt Instrument [Line Items]
Par value		3,836
NV Energy [Member] | Subsidiary Debt [Member]
Debt Instrument [Line Items]
Par value		3,836
NV Energy [Member] | Nevada Power Company [Member]
Debt Instrument [Line Items]
Par value		2,384
NV Energy [Member] | Nevada Power Company [Member] | Mortgage Securities, 2.750%, Series BB due 2020 [Member]
Debt Instrument [Line Items]
Par value		575
NV Energy [Member] | Nevada Power Company [Member] | Subsidiary Debt [Member]
Debt Instrument [Line Items]
Par value		$ 2,384
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%
Long-term Debt			$ 574
NV Energy [Member] | Nevada Power Company [Member] | Subsidiary Debt [Member] | Subsequent Event [Member] | Mortgage Securities, 2.400%, Series DD due 2030 [Member]
Debt Instrument [Line Items]
Par value	$ 425
Debt Instrument, Interest Rate, Stated Percentage	2.40%
NV Energy [Member] | Nevada Power Company [Member] | Subsidiary Debt [Member] | Subsequent Event [Member] | Mortgage Securities, 3.125%, Series EE due 2050 [Member]
Debt Instrument [Line Items]
Par value	$ 300
Debt Instrument, Interest Rate, Stated Percentage	3.125%
NV Energy [Member] | Nevada Power Company [Member] | Subsidiary Debt [Member] | Subsequent Event [Member] | Mortgage Securities, 2.750%, Series BB due 2020 [Member]
Debt Instrument [Line Items]
Par value	$ 575
Debt Instrument, Interest Rate, Stated Percentage	2.75%
Early Repayment of Senior Debt	$ 575

Subsidiary Debt Subsidiary De_8

Subsidiary Debt Subsidiary Debt - SPPC - Long-Term Debt (Details) - USD ($) $ in Millions		Dec. 31, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Par value		$ 39,634
Long-term Debt		39,353	$ 36,774
Subsidiary Debt [Member]
Debt Instrument [Line Items]
Par value		30,883
Other long-term debt		30,672	27,573
Sierra Pacific Power Company [Member]
Debt Instrument [Line Items]
Long-term Debt		1,135	1,120
Long-term Debt, Excluding Current Maturities		1,135	1,120
NV Energy [Member]
Debt Instrument [Line Items]
Par value		3,836
Other long-term debt		3,821	3,817
NV Energy [Member] | Subsidiary Debt [Member]
Debt Instrument [Line Items]
Par value		3,836
Other long-term debt		3,821	3,817
NV Energy [Member] | Sierra Pacific Power Company [Member]
Debt Instrument [Line Items]
Par value		1,137
Other long-term debt		1,136	1,121
NV Energy [Member] | Sierra Pacific Power Company [Member] | Mortgage securities, 3.375%, Series T due 2023 [Member]
Debt Instrument [Line Items]
Par value		250
Other long-term debt		249	249
NV Energy [Member] | Sierra Pacific Power Company [Member] | Mortgage securities, 2.600%, Series U due 2026 [Member]
Debt Instrument [Line Items]
Par value		400
Other long-term debt		396	396
NV Energy [Member] | Sierra Pacific Power Company [Member] | Mortgage securities, 6.750%, Series P due 2037 [Member]
Debt Instrument [Line Items]
Par value		252
Other long-term debt		256	256
NV Energy [Member] | Sierra Pacific Power Company [Member] | Pollution Control Refunding Revenue Bonds, 1.250%, Series 2016A, due 2029 [Member]
Debt Instrument [Line Items]
Par value		0
Other long-term debt			20
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 facilities refunding revenue bonds, 1.500%, series 2016A, due 2031 [Member]
Debt Instrument [Line Items]
Par value		0
Other long-term debt			58
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
Other long-term debt			62
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]	0
Other long-term debt			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
Other long-term debt			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
Other long-term debt			$ 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%
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%
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%
Long-term Debt		$ 255	$ 255
NV Energy [Member] | Sierra Pacific Power Company [Member] | Subsidiary Debt [Member] | Pollution Control Refunding Revenue Bonds, 1.250%, Series 2016A, due 2029 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		1.25%	1.25%
Long-term Debt		$ 0	$ 20
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%	0.00%
Long-term Debt	[1]	$ 29	$ 0
NV Energy [Member] | Sierra Pacific Power Company [Member] | Subsidiary Debt [Member] | Gas facilities refunding revenue bonds, 1.500%, series 2016A, due 2031 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		1.50%	1.50%
Long-term Debt		$ 0	$ 58
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%
Long-term Debt	[2]	$ 62	$ 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		1.85%
Long-term Debt	[3]	$ 0	30
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%
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%
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%	0.00%
Long-term Debt	[1]	$ 74	$ 0
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%	0.00%
Long-term Debt	[1]	$ 20	$ 0
NV Energy [Member] | Sierra Pacific Power Company [Member] | Subsidiary Debt [Member] | Minimum [Member] | Water facilities refunding revenue bonds, series 2016C, due 2036 [Member]
Debt Instrument [Line Items]
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate			1.75%
NV Energy [Member] | Sierra Pacific Power Company [Member] | Subsidiary Debt [Member] | Minimum [Member] | Water facilities refunding revenue bonds, series 2016D, due 2036 [Member]
Debt Instrument [Line Items]
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate			1.75%
NV Energy [Member] | Sierra Pacific Power Company [Member] | Subsidiary Debt [Member] | Minimum [Member] | Water facilities refunding revenue bonds, series 2016E, due 2036 [Member]
Debt Instrument [Line Items]
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate			1.75%
NV Energy [Member] | Sierra Pacific Power Company [Member] | Subsidiary Debt [Member] | Maximum [Member] | Water facilities refunding revenue bonds, series 2016C, due 2036 [Member]
Debt Instrument [Line Items]
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate			1.82%
NV Energy [Member] | Sierra Pacific Power Company [Member] | Subsidiary Debt [Member] | Maximum [Member] | Water facilities refunding revenue bonds, series 2016D, due 2036 [Member]
Debt Instrument [Line Items]
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate			1.82%
NV Energy [Member] | Sierra Pacific Power Company [Member] | Subsidiary Debt [Member] | Maximum [Member] | Water facilities refunding revenue bonds, series 2016E, due 2036 [Member]
Debt Instrument [Line Items]
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate			1.82%
[1]	Subject to mandatory purchase by Sierra Pacific in April 2022 at which date the interest rate may be adjusted from time to time.
[2]	(2)Subject to mandatory purchase by Sierra Pacific in June 2022 at which date the interest rate may be adjusted from time to time.
[3]	(3)Bond was purchased by Sierra Pacific during 2019. As of December 31, 2018 the bond variable interest rate was 1.750% to 1.820%.
[4]	(4)Bonds were purchased by Sierra Pacific during 2019 and re-offered at a fixed interest rate. As of December 31, 2018 the bonds variable interest rate was 1.750% to 1.820%.

Subsidiary Debt Subsidiary De_9

Subsidiary Debt Subsidiary Debt - SPPC - Annual Payment on Long-Term Debt (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Long-term Debt, Maturities, Repayments of Principal in Year Four	$ 2,508
Long-term Debt, Maturities, Repayments of Principal after Year Five	29,872
Par value	39,634
Long-term Debt	39,353	$ 36,774
Subsidiary Debt [Member]
Debt Instrument [Line Items]
Par value	30,883
Sierra Pacific Power Company [Member]
Debt Instrument [Line Items]
Long-term Debt	1,135	$ 1,120
Sierra Pacific Power Company [Member] | Long-term Debt [Member]
Debt Instrument [Line Items]
Long-term Debt, Maturities, Repayments of Principal in Year Four	250
Long-term Debt, Maturities, Repayments of Principal after Year Five	887
Debt Instrument, Unamortized Premium, Discount and Debt Issuance Cost	(2)
Long-term Debt	1,135
NV Energy [Member]
Debt Instrument [Line Items]
Par value	3,836
NV Energy [Member] | Subsidiary Debt [Member]
Debt Instrument [Line Items]
Long-term Debt, Maturities, Repayments of Principal in Year Four	250
Long-term Debt, Maturities, Repayments of Principal after Year Five	2,696
Par value	3,836
NV Energy [Member] | Sierra Pacific Power Company [Member]
Debt Instrument [Line Items]
Par value	1,137
NV Energy [Member] | Sierra Pacific Power Company [Member] | Long-term Debt [Member]
Debt Instrument [Line Items]
Par value	$ 1,137

Subsidiary Debt Subsidiary D_10

Subsidiary Debt Subsidiary Debt - SPPC (Details) - USD ($) $ in Billions	Dec. 31, 2019	Dec. 31, 2018
PacifiCorp [Member]
Debt Instrument [Line Items]
Eligible Property Subject To Lien Of Mortgages	$ 29
MidAmerican Energy Company and Subsidiaries [Member]
Debt Instrument [Line Items]
Eligible Property Subject To Lien Of Mortgages	20
Nevada Power Company [Member]
Debt Instrument [Line Items]
Eligible Property Subject To Lien Of Mortgages	8.7
Sierra Pacific Power Company [Member]
Debt Instrument [Line Items]
Eligible Property Subject To Lien Of Mortgages	$ 4.2
First Mortgage Bonds, 3.50% to 7.70%, Due 2029 to 2031 [Member] | PacifiCorp [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		7.70%
First Mortgage Bonds, 4.125%, Due 2049 [Member] | PacifiCorp [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		4.13%
MEC First Mortgage Bonds, 3.65, Due 2048 [Member] | MidAmerican Energy Company and Subsidiaries [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	3.65%	3.65%
MEC First Mortgage Bonds, 4.25%, Due July 2049 [Member] | MidAmerican Energy Company and Subsidiaries [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	4.25%	0.00%
MEC First Mortgage Bonds, 3.65%, Due April 2029 [Member] | MidAmerican Energy Company and Subsidiaries [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	3.65%	0.00%
Guaranteed Bonds, 2.75%, due May 2049 [Member] | Northern Electric Plc [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	2.75%
MEC First Mortgage Bonds, 3.15%, Due April 2050 [Member] | MidAmerican Energy Company and Subsidiaries [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	3.15%	0.00%
Bonds, 2.25%, due 2059 [Member] | Northern Powergrid Holdings [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	2.25%
Subsidiary Debt [Member] | MidAmerican Funding [Member] | MidAmerican Energy Company [Member]
Debt Instrument [Line Items]
Eligible Property Subject To Lien Of Mortgages	$ 20
Subsidiary Debt [Member] | MidAmerican Funding [Member] | MEC Transmission Upgrade Obligations, 4.45% and 3.42% Due Through 2035 and 2036 [Member] | MidAmerican Energy Company [Member]
Debt Instrument [Line Items]
Vendor Financing, Discount Rate Applied
Subsidiary Debt [Member] | MidAmerican Funding [Member] | MEC First Mortgage Bonds, 3.65, Due 2048 [Member] | MidAmerican Energy Company [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	3.65%	3.65%
Subsidiary Debt [Member] | NV Energy [Member] | Mortgage Securities, 2.750%, Series BB due 2020 [Member] | Nevada Power Company [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	2.75%	2.75%
Subsidiary Debt [Member] | NV Energy [Member] | Pollution Control Refunding Revenue Bonds, 1.850%, Series 2016B, due 2029 [Member] | Sierra Pacific Power Company [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	1.85%	0.00%
Subsidiary Debt [Member] | NV Energy [Member] | Water facilities refunding revenue bonds, series 2016C, due 2036 [Member] | Sierra Pacific Power Company [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	1.85%
Subsidiary Debt [Member] | NV Energy [Member] | Water facilities refunding revenue bonds, series 2016D, due 2036 [Member] | Sierra Pacific Power Company [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	2.05%
Subsidiary Debt [Member] | NV Energy [Member] | Water facilities refunding revenue bonds, series 2016E, due 2036 [Member] | Sierra Pacific Power Company [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	2.05%
Subsidiary Debt [Member] | NV Energy [Member] | Water facilities refunding revenue bonds, series 2016F, due 2036 [Member] | Sierra Pacific Power Company [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	2.05%	0.00%
Subsidiary Debt [Member] | NV Energy [Member] | Water facilities refunding revenue bonds, series 2016G, due 2036 [Member] | Sierra Pacific Power Company [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	1.85%	0.00%
Subsidiary Debt [Member] | NV Energy [Member] | Mortgage Securities, 3.700%, Series CC due 2029 [Member] | Nevada Power Company [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	3.70%	0.00%
Minimum [Member] | First Mortgage Bonds, 3.50% to 7.70%, Due 2029 to 2031 [Member] | PacifiCorp [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	3.50%
Minimum [Member] | First Mortgage Bonds, 4.125%, Due 2049 [Member] | PacifiCorp [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	4.13%
Minimum [Member] | MEC Transmission Upgrade Obligations, 4.45% and 3.42% Due Through 2035 and 2036 [Member] | MidAmerican Energy Company and Subsidiaries [Member]
Debt Instrument [Line Items]
Vendor Financing, Discount Rate Applied	3.42%	3.42%
Minimum [Member] | Subsidiary Debt [Member] | MidAmerican Funding [Member] | MEC Transmission Upgrade Obligations, 4.45% and 3.42% Due Through 2035 and 2036 [Member] | MidAmerican Energy Company [Member]
Debt Instrument [Line Items]
Vendor Financing, Discount Rate Applied	3.42%	3.42%
Maximum [Member] | First Mortgage Bonds, 3.50% to 7.70%, Due 2029 to 2031 [Member] | PacifiCorp [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	7.70%	7.70%
Maximum [Member] | First Mortgage Bonds, 4.125%, Due 2049 [Member] | PacifiCorp [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	4.15%
Maximum [Member] | MEC Transmission Upgrade Obligations, 4.45% and 3.42% Due Through 2035 and 2036 [Member] | MidAmerican Energy Company and Subsidiaries [Member]
Debt Instrument [Line Items]
Vendor Financing, Discount Rate Applied	4.45%
Maximum [Member] | Subsidiary Debt [Member] | MidAmerican Funding [Member] | MEC Transmission Upgrade Obligations, 4.45% and 3.42% Due Through 2035 and 2036 [Member] | MidAmerican Energy Company [Member]
Debt Instrument [Line Items]
Vendor Financing, Discount Rate Applied	4.45%	4.45%

Subsidiary Debt - Northern Powe

Subsidiary Debt - Northern Powergrid (Details) - USD ($) $ in Millions		Dec. 31, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Par value		$ 39,634
Subsidiary Debt [Member]
Debt Instrument [Line Items]
Par value		30,883
Other long-term debt		30,672	$ 27,573
PacifiCorp [Member] | Subsidiary Debt [Member]
Debt Instrument [Line Items]
Par value		7,705
Other long-term debt		$ 7,658	$ 7,015
PacifiCorp [Member] | Subsidiary Debt [Member] | Minimum [Member]
Debt Instrument [Line Items]
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate		1.60%	1.67%
PacifiCorp [Member] | Subsidiary Debt [Member] | Maximum [Member]
Debt Instrument [Line Items]
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate		1.80%	1.85%
PacifiCorp [Member] | Subsidiary Debt [Member] | First Mortgage Bonds, 4.125%, Due 2049 [Member] | Minimum [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage
Northern Powergrid Holdings [Member]
Debt Instrument [Line Items]
Par value	[1]	$ 3,234
Other long-term debt		3,221	$ 2,626
Northern Powergrid Holdings [Member] | Bonds, 8.875%, due 2020 [Member]
Debt Instrument [Line Items]
Par value	[1]	133
Other long-term debt		135	133
Northern Powergrid Holdings [Member] | Bonds, 9.25%, due 2020 [Member]
Debt Instrument [Line Items]
Par value	[1]	265
Other long-term debt		265	260
Northern Powergrid Holdings [Member] | European Investment Bank loans, 4.133% to 4.586%, due 2019 to 2022 [Member]
Debt Instrument [Line Items]
Par value	[1]	251
Other long-term debt		252	293
Northern Powergrid Holdings [Member] | Bonds, 7.25%, due 2022 [Member]
Debt Instrument [Line Items]
Par value	[1]	265
Other long-term debt		270	262
Northern Powergrid Holdings [Member] | Bonds, 2.50%, due 2025 [Member]
Debt Instrument [Line Items]
Par value	[1]	199
Other long-term debt		197	189
Northern Powergrid Holdings [Member] | European Investment Bank loan, 2.073%, due 2025 [Member]
Debt Instrument [Line Items]
Par value	[1]	66
Other long-term debt		68	65
Northern Powergrid Holdings [Member] | European Investment Bank loans, 2.564%, due 2017 [Member]
Debt Instrument [Line Items]
Par value	[1]	332
Other long-term debt		330	318
Northern Powergrid Holdings [Member] | Bonds, 7.25%, due 2028 [Member]
Debt Instrument [Line Items]
Par value	[1]	246
Other long-term debt		250	241
Northern Powergrid Holdings [Member] | Bonds, 5.125%, due 2035 [Member]
Debt Instrument [Line Items]
Par value	[1]	265
Other long-term debt		262	252
Northern Powergrid Holdings [Member] | Bonds, 5.125%, due 2035 [Member]
Debt Instrument [Line Items]
Par value	[1]	199
Other long-term debt		197	189
Northern Powergrid Holdings [Member] | Bonds, 4.375%, due 2032 [Member]
Debt Instrument [Line Items]
Par value	[1]	199
Other long-term debt		196	188
Northern Powergrid Holdings [Member] | Variable-rate bond, due 2026 [Member]
Debt Instrument [Line Items]
Par value	[1],[2]	217
Other long-term debt	[2]	214	236
Northern Powergrid Holdings [Member] | Subsidiary Debt [Member]
Debt Instrument [Line Items]
Par value		3,234
Other long-term debt		$ 3,221	$ 2,626
Northern Powergrid Holdings [Member] | Subsidiary Debt [Member] | Bonds, 8.875%, due 2020 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		8.875%	8.875%
Northern Powergrid Holdings [Member] | Subsidiary Debt [Member] | Bonds, 9.25%, due 2020 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		9.25%	9.25%
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] | European Investment Bank loans, 4.133% to 4.586%, due 2019 to 2022 [Member] | Maximum [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		4.586%
Northern Powergrid Holdings [Member] | Subsidiary Debt [Member] | European Investment Bank loans, 3.901% to 4.586%, due 2018 to 2022 [Member] | Minimum [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage			3.901%
Northern Powergrid Holdings [Member] | Subsidiary Debt [Member] | European Investment Bank loans, 3.901% to 4.586%, due 2018 to 2022 [Member] | Maximum [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage			4.586%
Northern Powergrid Holdings [Member] | Subsidiary Debt [Member] | Bonds, 7.25%, due 2022 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		7.25%	7.25%
Northern Powergrid Holdings [Member] | Subsidiary Debt [Member] | Bonds, 2.50%, due 2025 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		2.50%	2.50%
Northern Powergrid Holdings [Member] | Subsidiary Debt [Member] | European Investment Bank loan, 2.073%, due 2025 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		2.073%	2.073%
Northern Powergrid Holdings [Member] | Subsidiary Debt [Member] | European Investment Bank loans, 2.564%, due 2017 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		2.564%	2.564%
Northern Powergrid Holdings [Member] | Subsidiary Debt [Member] | Bonds, 7.25%, due 2028 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		7.25%	7.25%
Northern Powergrid Holdings [Member] | Subsidiary Debt [Member] | Bonds, 5.125%, due 2035 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		5.125%	5.125%
Northern Powergrid Holdings [Member] | Subsidiary Debt [Member] | Bonds, 5.125%, due 2035 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		5.125%	5.125%
Northern Powergrid Holdings [Member] | Subsidiary Debt [Member] | Bonds, 4.375%, due 2032 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		4.375%	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		2.54%
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate		2.82%
Northern Powergrid Holdings [Member] | Bonds, 2.25%, due 2059 [Member]
Debt Instrument [Line Items]
Par value	[1]	$ 398
Other long-term debt		$ 389
Debt Instrument, Interest Rate, Stated Percentage		2.25%
Northern Electric Plc [Member] | Guaranteed Bonds, 2.75%, due May 2049 [Member]
Debt Instrument [Line Items]
Par value	[1]	$ 199
Other long-term debt		$ 196
Debt Instrument, Interest Rate, Stated Percentage		2.75%
[1]	(1)The par values for these debt instruments are denominated in sterling.
[2]	(2)Amortizes semiannually and the Company has entered into an interest rate swap that fixes the interest rate on 86% of the outstanding debt. The variable interest rate as of December 31, 2019 was 2.54% while the fixed interest rate was 2.82%.

Subsidiary Debt - BHE Pipeline

Subsidiary Debt - BHE Pipeline Group (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Par value	$ 39,634
Subsidiary Debt [Member]
Debt Instrument [Line Items]
Par value	30,883
Other long-term debt	30,672	$ 27,573
BHE Pipeline Group [Member]
Debt Instrument [Line Items]
Par value	1,250
Other long-term debt	1,247	1,042
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	199
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	$ 446
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 Subsidiary D_11

Subsidiary Debt Subsidiary Debt - AltaLink (Details) - USD ($) $ in Millions		Dec. 31, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Par value		$ 39,634
Subsidiary Debt [Member]
Debt Instrument [Line Items]
Par value		30,883
Other long-term debt		30,672	$ 27,573
ALP Investments [Member]
Debt Instrument [Line Items]
Par value	[1]	308
Other long-term debt		308	442
ALP Investments [Member] | Series 12-1 Senior Bonds, 3.674%, due 2019 [Member]
Debt Instrument [Line Items]
Par value	[1]	0
Other long-term debt		0	148
ALP Investments [Member] | Series 13-1 Senior Bonds, 3.265%, due 2020 [Member]
Debt Instrument [Line Items]
Par value	[1]	154
Other long-term debt		154	148
ALP Investments [Member] | Series 15-1 Senior Bonds, 2.244%, due 2022 [Member]
Debt Instrument [Line Items]
Par value	[1]	154
Other long-term debt		$ 154	$ 146
ALP Investments [Member] | Subsidiary Debt [Member] | Series 12-1 Senior Bonds, 3.674%, due 2019 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		3.674%	3.674%
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%	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%	2.244%
AltaLink, L.P. [Member] | Subsidiary Debt [Member]
Debt Instrument [Line Items]
Par value	[1]	$ 3,576
Other long-term debt		$ 3,564	$ 3,392
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%	3.621%
Par value	[1]	$ 96
Other long-term debt		$ 96	$ 92
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%	2.978%
Par value	[1]	$ 212
Other long-term debt		$ 212	$ 201
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%	3.668%
Par value	[1]	$ 385
Other long-term debt		$ 384	$ 366
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%	3.399%
Par value	[1]	$ 269
Other long-term debt		$ 269	$ 256
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%	2.747%
Par value	[1]	$ 269
Other long-term debt		$ 269	$ 255
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%	5.249%
Par value	[1]	$ 115
Other long-term debt		$ 115	$ 109
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%	5.381%
Par value	[1]	$ 96
Other long-term debt		$ 96	$ 91
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%	4.872%
Par value	[1]	$ 115
Other long-term debt		$ 115	$ 109
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%	4.462%
Par value	[1]	$ 212
Other long-term debt		$ 211	$ 201
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%	3.99%
Par value	[1]	$ 404
Other long-term debt		$ 398	$ 380
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%	4.922%
Par value	[1]	$ 269
Other long-term debt		$ 268	$ 256
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%	4.054%
Par value	[1]	$ 227
Other long-term debt		$ 226	$ 215
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%	4.09%
Par value	[1]	$ 269
Other long-term debt		$ 268	$ 255
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%	3.717%
Par value	[1]	$ 346
Other long-term debt		$ 345	$ 328
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%	4.446%
Par value	[1]	$ 192
Other long-term debt		$ 192	$ 183
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%	4.274%
Par value	[1]	$ 100
Other long-term debt		$ 100	$ 95
AltaLink, L.P. [Member] | Subsidiary Debt [Member] | Construction Loan, 4.950%, due 2021 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage			5.66%
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	$ 8
BHE Transmission [Member] | Subsidiary Debt [Member]
Debt Instrument [Line Items]
Par value	[1]	3,891
Other long-term debt		$ 3,879	$ 3,842
[1]	ns): Par Value(1) 2019 2018AltaLink Investments, L.P.: Series 12-1 Senior Bonds, 3.674%, due 2019$— $— $148Series 13-1 Senior Bonds, 3.265%, due 2020154 154 148Series 15-1 Senior Bonds, 2.244%, due 2022154 154 146Total AltaLink Investments, L.P.308 308 442 AltaLink, L.P.: Series 2013-2 Notes, 3.621%, due 202096 96 92Series 2012-2 Notes, 2.978%, due 2022212 212 201Series 2013-4 Notes, 3.668%, due 2023385 384 366Series 2014-1 Notes, 3.399%, due 2024269 269 256Series 2016-1 Notes, 2.747%, due 2026269 269 255Series 2006-1 Notes, 5.249%, due 2036115 115 109Series 2010-1 Notes, 5.381%, due 204096 96 91Series 2010-2 Notes, 4.872%, due 2040115 115 109Series 2011-1 Notes, 4.462%, due 2041212 211 201Series 2012-1 Notes, 3.990%, due 2042404 398 380Series 2013-3 Notes, 4.922%, due 2043269 268 256Series 2014-3 Notes, 4.054%, due 2044227 226 215Series 2015-1 Notes, 4.090%, due 2045269 268 255Series 2016-2 Notes, 3.717%, due 2046346 345 328Series 2013-1 Notes, 4.446%, due 2053192 192 183Series 2014-2 Notes, 4.274%, due 2064100 100 95Total AltaLink, L.P.3,576 3,564 3,392 Other: Construction Loan, 5.620%, due 20207 7 8 Total BHE Transmission$3,891 $3,879 $3,842(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		Jan. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Par value			$ 39,634
Subsidiary Debt [Member]
Debt Instrument [Line Items]
Par value			30,883
Other long-term debt			30,672	$ 27,573
BHE Renewables [Member] | Subsidiary Debt [Member]
Debt Instrument [Line Items]
Par value			3,239
Other long-term debt			$ 3,206	$ 3,401
BHE Renewables [Member] | Subsidiary Debt [Member] | Minimum [Member]
Debt Instrument [Line Items]
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate			3.21%	3.21%
BHE Renewables [Member] | Subsidiary Debt [Member] | Maximum [Member]
Debt Instrument [Line Items]
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate			5.41%	5.41%
BHE Renewables [Member] | Subsidiary Debt [Member] | Bishop Hill Holdings Senior Notes, 5.125%, due 2032 [Member]
Debt Instrument [Line Items]
Par value	[1]		$ 78
Other long-term debt	[1]		77	$ 84
BHE 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]		283
Other long-term debt	[1]		280	292
BHE 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]		894
Other long-term debt	[1]		886	915
BHE Renewables [Member] | Subsidiary Debt [Member] | Grande Prairie Wind, Senior Notes, 3.860%, due 2037 [Member]
Debt Instrument [Line Items]
Par value	[1]		358
Other long-term debt			355	392
BHE Renewables [Member] | Subsidiary Debt [Member] | Topaz Solar Farms Senior Notes, 5.75%, due 2039 [Member]
Debt Instrument [Line Items]
Par value	[1]		680
Other long-term debt	[1]		672	709
BHE Renewables [Member] | Subsidiary Debt [Member] | Topaz Solar Farms Senior Notes, 4.875%, due 2039
Debt Instrument [Line Items]
Par value	[1]		195
Other long-term debt	[1]		193	205
BHE Renewables [Member] | Subsidiary Debt [Member] | Alamo 6 Senior Notes, 4.170%, due 2042 [Member]
Debt Instrument [Line Items]
Par value	[1]		216
Other long-term debt	[1]		213	221
BHE Renewables [Member] | Subsidiary Debt [Member] | Other debt obligations [Member]
Debt Instrument [Line Items]
Par value	[1]		13
Other long-term debt	[1]		13	16
BHE Renewables [Member] | Subsidiary Debt [Member] | Pinyon Pines I and II Term Loan, due 2020 [Member]
Debt Instrument [Line Items]
Par value	[1],[2]		284
Other long-term debt	[1],[2]		284	310
BHE Renewables [Member] | Subsidiary Debt [Member] | Pinyon Pines I and II Term Loans, due 2019 [Member]
Debt Instrument [Line Items]
Debt Instrument, Repurchased Face Amount		$ 284
BHE Renewables [Member] | Subsidiary Debt [Member] | TX Jumbo Road Term Loan, 3.626% due 2025 [Member]
Debt Instrument [Line Items]
Par value	[1],[2]		161
Other long-term debt	[1],[2]		158	176
BHE Renewables [Member] | Subsidiary Debt [Member] | Marshall Wind term loan, variable interest rate, due 2026 [Member]
Debt Instrument [Line Items]
Par value	[1],[2]		77
Other long-term debt	[1],[2]		$ 75	$ 81
BHE Renewables [Member] | Subsidiary Debt [Member] | Pinyon Pines I and II Term Loan, due 2034 [Member]
Debt Instrument [Line Items]
Other long-term debt	[1],[2]	$ 382
BHE Renewables [Member] | Subsidiary Debt [Member] | Bishop Hill Holdings Senior Notes, 5.125%, due 2032 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage			5.125%	5.125%
BHE Renewables [Member] | Subsidiary Debt [Member] | Solar Star Funding, LLC Series A Senior Secured Notes, 3.950%, due June 2035 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage			3.95%	3.95%
BHE Renewables [Member] | Subsidiary Debt [Member] | Solar Star Funding, LLC Series A Senior Secured Notes, 5.375%, due June 2035 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage			5.375%	5.375%
BHE Renewables [Member] | Subsidiary Debt [Member] | Grande Prairie Wind, Senior Notes, 3.860%, due 2037 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage			3.86%	3.86%
BHE Renewables [Member] | Subsidiary Debt [Member] | Topaz Solar Farms Senior Notes, 5.75%, due 2039 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage			5.75%	5.75%
BHE Renewables [Member] | Subsidiary Debt [Member] | Topaz Solar Farms Senior Notes, 4.875%, due 2039
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage			4.875%	4.875%
BHE Renewables [Member] | Subsidiary Debt [Member] | Alamo 6, LLC Senior Secured Notes, 4.17%, due March 2018 through March 2042 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage			4.17%	4.17%
BHE Renewables [Member] | Subsidiary Debt [Member] | Pinyon Pines I and II Term Loan, due 2020 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage			3.69%
BHE Renewables [Member] | Subsidiary Debt [Member] | Pinyon Pines I and II Term Loans, due 2019 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage				4.55%
BHE Renewables [Member] | Subsidiary Debt [Member] | TX Jumbo Road Term Loan, 3.626% due 2025 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage			3.626%	3.626%
BHE Renewables [Member] | Subsidiary Debt [Member] | Marshall Wind term loan, variable interest rate, due 2026 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage			3.212%	3.212%
[1]	(1)Amortizes quarterly or semiannually.
[2]	(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 75% of the Pinyon Pines outstanding debt through December 31, 2019 and 50% of the Pinyon Pines outstanding debt thereafter, and 100% of the TX Jumbo Road and Marshall Wind outstanding debt. The variable interest rate as of December 31, 2019 and 2018 was 3.69% and 4.55%, respectively, while the fixed interest rates as of December 31, 2019 and 2018 ranged from 3.21% to 5.41%.

Subsidiary Debt Subsidiary D_12

Subsidiary Debt Subsidiary Debt - HomeServices (Details) - USD ($) $ in Millions		Dec. 31, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Par value		$ 39,634
Long-term Debt		39,353	$ 36,774
Subsidiary Debt [Member]
Debt Instrument [Line Items]
Par value		30,883
HomeServices [Member] | Variable-rate Term Loan - Due 2022 [Member]
Debt Instrument [Line Items]
Par value	[1]	213
HomeServices [Member] | Subsidiary Debt [Member]
Debt Instrument [Line Items]
Par value		$ 213
HomeServices [Member] | Subsidiary Debt [Member] | Variable-rate Term Loan - Due 2022 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		3.299%	4.022%
HomeServices [Member] | HomeServices [Member] | Subsidiary Debt [Member] | Variable-rate Term Loan - Due 2022 [Member]
Debt Instrument [Line Items]
Long-term Debt	[1]	$ 213	$ 233
[1]	(1)Term loan amortizes quarterly and variable-rate resets monthly.

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, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Derivatives, Fair Value [Line Items]
Derivative, Fair Value, Net	$ (63)	$ (97)
Cash Collateral, Net Receivable (Payable), Offset Against Derivative Positions	47	59
Derivative Assets (Liabilities), at Fair Value, Net	(16)	(38)
Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative, Fair Value, Net	12	27
Cash Collateral, Net Receivable (Payable), Offset Against Derivative Positions	0	(2)
Derivative Assets (Liabilities), at Fair Value, Net	12	25
Other Noncurrent Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative, Fair Value, Net	2	3
Cash Collateral, Net Receivable (Payable), Offset Against Derivative Positions	0	0
Derivative Assets (Liabilities), at Fair Value, Net	2	3
Other Current Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative, Fair Value, Net	(27)	(57)
Cash Collateral, Net Receivable (Payable), Offset Against Derivative Positions	20	16
Derivative Assets (Liabilities), at Fair Value, Net	(7)	(41)
Other Noncurrent Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative, Fair Value, Net	(50)	(70)
Cash Collateral, Net Receivable (Payable), Offset Against Derivative Positions	27	45
Derivative Assets (Liabilities), at Fair Value, Net	(23)	(25)
Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement	21	51
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement	(84)	(148)
Derivative, Fair Value, Net	(63)	(97)
Net Regulatory Asset (Liability), Unrealized Loss (Gain) On Derivative Contracts	62	96	$ 101	$ 73
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	15	36
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement	(3)	(9)
Derivative, Fair Value, Net	12	27
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	2	4
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement	0	(1)
Derivative, Fair Value, Net	2	3
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	4	10
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement	(31)	(67)
Derivative, Fair Value, Net	(27)	(57)
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	1
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement	(50)	(71)
Derivative, Fair Value, Net	$ (50)	$ (70)

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, 2019	Dec. 31, 2018	Dec. 31, 2017
Regulatory Assets (Liabilities), Net, Derivatives [Roll Forward]
Beginning balance	$ 96	$ 101	$ 73
Changes In Fair Value Derivatives Recognized In Regulatory Assets Or Liabilities, Net	(37)	12	47
Net Gains (Losses) Reclassified To Operating Revenue	(34)	(68)	9
Net Gains (Losses) Reclassified To Cost Of Domestic Regulated Electric	37	51	(28)
Ending balance	$ 62	$ 96	$ 101

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, 2019DthMWh	Dec. 31, 2018DthMWh
Electricity purchases (sales), net, in megawatt hours [Member]
Notional Amounts of Outstanding Derivative Positions [Line Items]
Derivative, Nonmonetary Notional Amount | MWh	2	6
Natural gas purchases (sales), in decatherms [Member]
Notional Amounts of Outstanding Derivative Positions [Line Items]
Derivative, Nonmonetary Notional Amount | Dth	129	117

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, 2019	Dec. 31, 2018
Derivative [Line Items]
Derivative, Net Liability Position, Aggregate Fair Value	$ 80	$ 113
Collateral Already Posted, Aggregate Fair Value	47	61
Additional Collateral, Aggregate Fair Value	$ 27	$ 35

Fair Value Measurements (Detail

Fair Value Measurements (Details) - Fair Value, Recurring [Member] - USD ($) $ in Millions		Dec. 31, 2019		Dec. 31, 2018
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		$ (24)	[1]	$ (52)
Assets, Fair Value Disclosure		3,897		3,114
Derivative Liability, Fair Value, Gross Asset and Right to Reclaim Cash, Offset	[1]	103		111
Derivative Liability		(76)		(111)
Cash collateral receivable (payable), offset against derivative positions	[1]	79		59
Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure		2,649		2,423
Derivative Liability		(6)		(1)
Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure		1,150		625
Derivative Liability		(162)		(212)
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure		122		118
Derivative Liability		(11)		(9)
Mortgage loans held for sale [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		1,039		468
Mortgage loans held for sale [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		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]
Available-for-sale Securities		1,039		468
Mortgage loans held for sale [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		0		0
Money market mutual funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	[2]	824		409
Money market mutual funds [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	[2]	824		409
Money market mutual funds [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	[2]	0		0
Money market mutual funds [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	[2]	0		0
United States government obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		189		187
United States government obligations [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		189		187
United States government obligations [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		0		0
United States government obligations [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		0		0
International governement obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		4		4
International governement obligations [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		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]
Available-for-sale Securities		4		4
International governement obligations [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		0		0
Corporate obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		58		46
Corporate obligations [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		0		0
Corporate obligations [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		58		46
Corporate obligations [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		0		0
Municipal Bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		1		2
Municipal Bonds [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		0		0
Municipal Bonds [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		1		2
Municipal Bonds [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		0		0
Agency, asset and mortgage-backed obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities				1
Agency, asset and mortgage-backed obligations [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities				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]
Available-for-sale Securities				1
Agency, asset and mortgage-backed obligations [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities				0
United States companies [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		336		256
United States companies [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		336		256
United States companies [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		0		0
United States companies [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		0		0
International companies [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		1,131		1,441
International companies [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		1,131		1,441
International companies [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		0		0
International companies [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		0		0
Investment funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		169		128
Investment funds [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		169		128
Investment funds [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		0		0
Investment funds [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		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	[1]	(24)		(52)
Derivative assets		129		148
Derivative Liability, Fair Value, Gross Asset and Right to Reclaim Cash, Offset	[1]	103		111
Derivative Liability		(55)		(79)
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		0		1
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement		4		1
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		45		91
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement		143		180
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		108		108
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement		11		9
Interest Rate Swap [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets		16		24
Derivative Liability		(21)		(32)
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		1
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement		2		0
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		2		13
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement		19		32
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		14		10
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement		$ 0		$ 0
[1]	Represents netting under master netting arrangements and a net cash collateral receivable of $79 million and $59 million as of December 31, 2019 and 2018, 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 Measurements - Level

Fair Value Measurements - Level 3 (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Commodity [Member]
Fair Value, Assets (Liabilities), Net, Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	$ 99	$ 94	$ 60
Fair Value, Assets and Liabilities Measured on Recurring Basis, Gain (Loss) Included in Earnings	(10)	(1)	(23)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Other Comprehensive Income (Loss)	(1)	2	(3)
Fair Value, Measurements with Unobservable Inputs Reconciliation, Recurring Basis, Gain (Loss) Included In Regulatory Assets and Liabilities, Net	26	(3)	1
Purchases	6	3	1
Settlements	(9)	4	(14)
Ending balance	97	99	94
Interest Rate Lock Commitments [Member]
Fair Value, Assets (Liabilities), Net, Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	10	9	6
Fair Value, Assets and Liabilities Measured on Recurring Basis, Gain (Loss) Included in Earnings	(479)	(181)	(147)
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	4
Settlements	475	180	148
Ending balance	$ 14	$ 10	$ 9

Fair Value Measurements - Debt

Fair Value Measurements - Debt (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term Debt	$ 39,353	$ 36,774
Fair Value, Inputs, Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term Debt, Fair Value	$ 46,004	$ 39,398

Fair Value Measurements - Pacif

Fair Value Measurements - PacifiCorp (Details) - USD ($) $ in Millions		Dec. 31, 2019		Dec. 31, 2018
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		$ (24)	[1]	$ (52)
Assets, Fair Value Disclosure		3,897		3,114
Derivative Liability, Fair Value, Gross Asset and Right to Reclaim Cash, Offset	[1]	103		111
Derivative Liability		(76)		(111)
Cash Collateral, Net Receivable (Payable), Offset Against Derivative Positions	[1]	79		59
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		2,649		2,423
Derivative Liability		(6)		(1)
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		1,150		625
Derivative Liability		(162)		(212)
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		122		118
Derivative Liability		(11)		(9)
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]	(24)		(52)
Derivative assets		129		148
Derivative Liability, Fair Value, Gross Asset and Right to Reclaim Cash, Offset	[1]	103		111
Derivative Liability		(55)		(79)
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		1
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement		4		1
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		45		91
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement		143		180
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		108		108
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement		11		9
Money market mutual funds [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	[2]	824		409
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]
Available-for-sale Securities	[2]	824		409
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]
Available-for-sale Securities	[2]	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]
Available-for-sale Securities	[2]	0		0
Investment funds [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		169		128
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]
Available-for-sale Securities		169		128
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]
Available-for-sale Securities		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]
Available-for-sale Securities		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		62		121
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		48		93
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		21		51
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, Net Receivable (Payable), Offset Against Derivative Positions		47		59
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	[3]	(7)		(23)
Derivative assets		14		28
Derivative Liability, Fair Value, Gross Asset and Right to Reclaim Cash, Offset	[3]	54		82
Derivative Liability		(30)		(66)
Cash Collateral, Net Receivable (Payable), Offset Against Derivative Positions		47		59
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		21		51
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement		84		148
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		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]
Available-for-sale Securities	[4]	23		69
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]
Available-for-sale Securities	[4]	23		69
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]
Available-for-sale Securities	[4]	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]
Available-for-sale Securities	[4]	0		0
PacifiCorp [Member] | Investment funds [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment funds		25		24
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]
Investment funds		25		24
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]
Investment funds		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]
Investment funds		$ 0		$ 0
[1]	Represents netting under master netting arrangements and a net cash collateral receivable of $79 million and $59 million as of December 31, 2019 and 2018, 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.
[3]	Represents netting under master netting arrangements and a net cash collateral receivable of $47 million and $59 million as of December 31, 2019 and 2018, respectively.
[4]	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, 2019	Dec. 31, 2018
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term Debt	$ 39,353	$ 36,774
Fair Value, Inputs, Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term Debt, Fair Value	46,004	39,398
PacifiCorp [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term Debt	7,658	7,015
PacifiCorp [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term Debt, Fair Value	$ 9,280	$ 7,833

Fair Value Measurements - MEC (

Fair Value Measurements - MEC (Details) - Fair Value, Recurring [Member] - USD ($) $ in Millions		Dec. 31, 2019		Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure		$ 3,897		$ 3,114
Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset		(24)	[1]	(52)
Derivative Liability		76		111
Derivative Liability, Fair Value, Gross Asset and Right to Reclaim Cash, Offset	[1]	103		111
Cash Collateral, Net Receivable (Payable), Offset Against Derivative Positions	[1]	79		59
Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure		2,649		2,423
Derivative Liability		6		1
Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure		1,150		625
Derivative Liability		162		212
Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure		122		118
Derivative Liability		11		9
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	[1]	(24)		(52)
Derivative Liability		55		79
Derivative Liability, Fair Value, Gross Asset and Right to Reclaim Cash, Offset	[1]	103		111
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		1
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement		(4)		(1)
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		45		91
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement		(143)		(180)
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		108		108
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement		(11)		(9)
Interest Rate Swap [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liability		21		32
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		1
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement		(2)		0
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		2		13
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement		(19)		(32)
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		14		10
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		889		517
Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset	[2]	(1)		(3)
Derivative Liability				(22)
Derivative Liability, Fair Value, Gross Asset and Right to Reclaim Cash, Offset	[2]			3
Cash Collateral, Net Receivable (Payable), Offset Against Derivative Positions		1		0
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		823		461
Derivative Liability				0
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		66		57
Derivative Liability				(23)
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		1		2
Derivative Liability				(2)
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		2		3
Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset		(1)		(3)	[2]
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement		(7)		(3)
Derivative Liability, Fair Value, Gross Asset and Right to Reclaim Cash, Offset	[2]	2		3
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		2		4
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement		(9)		(4)
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		1		2
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement		0		(2)
MidAmerican Energy Company [Member] | Interest Rate Swap [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)
MidAmerican Energy Company [Member] | Interest Rate Swap [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
MidAmerican Energy Company [Member] | Interest Rate Swap [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				(19)
MidAmerican Energy Company [Member] | Interest Rate Swap [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				0
Money market mutual funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	[3]	824		409
Money market mutual funds [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	[3]	824		409
Money market mutual funds [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	[3]	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]
Available-for-sale Securities	[3]	0		0
Money market mutual funds [Member] | MidAmerican Energy Company [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		274		2	[4]
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]
Available-for-sale Securities		274		2	[4]
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]
Available-for-sale Securities		0		0	[4]
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]
Available-for-sale Securities		0		0	[4]
US Treasury Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		189		187
US Treasury Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		189		187
US Treasury Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		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]
Available-for-sale Securities		0		0
US Treasury Securities [Member] | MidAmerican Energy Company [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		189		187
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]
Available-for-sale Securities		189		187
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]
Available-for-sale Securities		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]
Available-for-sale Securities		0		0
Debt Security, Government, Non-US [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		4		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]
Available-for-sale Securities		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]
Available-for-sale Securities		4		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]
Available-for-sale Securities		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]
Available-for-sale Securities		4		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]
Available-for-sale Securities		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]
Available-for-sale Securities		4		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]
Available-for-sale Securities		0		0
Debt Security, Corporate, US [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		58		46
Debt Security, Corporate, US [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		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]
Available-for-sale Securities		58		46
Debt Security, Corporate, US [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		0		0
Debt Security, Corporate, US [Member] | MidAmerican Energy Company [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		58		46
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]
Available-for-sale Securities		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]
Available-for-sale Securities		58		46
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]
Available-for-sale Securities		0		0
Municipal Bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		1		2
Municipal Bonds [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		0		0
Municipal Bonds [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		1		2
Municipal Bonds [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		0		0
Municipal Bonds [Member] | MidAmerican Energy Company [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		1		2
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]
Available-for-sale Securities		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]
Available-for-sale Securities		1		2
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]
Available-for-sale Securities		0		0
US Government-sponsored Enterprises Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities				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]
Available-for-sale Securities				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]
Available-for-sale Securities				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]
Available-for-sale Securities				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]
Available-for-sale Securities		1		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]
Available-for-sale Securities		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]
Available-for-sale Securities		1		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]
Available-for-sale Securities		0		0
Domestic Equity Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		336		256
Domestic Equity Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		336		256
Domestic Equity Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		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]
Available-for-sale Securities		0		0
Domestic Equity Securities [Member] | MidAmerican Energy Company [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		336		256
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]
Available-for-sale Securities		336		256
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]
Available-for-sale Securities		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]
Available-for-sale Securities		0		0
Foreign Equity Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		1,131		1,441
Foreign Equity Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		1,131		1,441
Foreign Equity Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		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]
Available-for-sale Securities		0		0
Foreign Equity Securities [Member] | MidAmerican Energy Company [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		9		6
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]
Available-for-sale Securities		9		6
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]
Available-for-sale Securities		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]
Available-for-sale Securities		0		0
Equity Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		169		128
Equity Funds [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		169		128
Equity Funds [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		0		0
Equity Funds [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		0		0
Equity Funds [Member] | MidAmerican Energy Company [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		15		10
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]
Available-for-sale Securities		15		10
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]
Available-for-sale Securities		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]
Available-for-sale Securities		$ 0		$ 0
[1]	Represents netting under master netting arrangements and a net cash collateral receivable of $79 million and $59 million as of December 31, 2019 and 2018, respectively.
[2]	(1)Represents netting under master netting arrangements and a net cash collateral receivable of $1 million and $- million as of December 31, 2019 and 2018, respectively.
[3]	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.
[4]	(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, 2019	Dec. 31, 2018
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term Debt	$ 39,353	$ 36,774
Fair Value, Inputs, Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term Debt, Fair Value	46,004	39,398
MidAmerican Energy Company [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term Debt	7,208	5,379
Long-term Debt, Fair Value		$ 5,644
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	$ 8,283

Fair Value Measurements - MidAm

Fair Value Measurements - MidAmerican Funding - Debt (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term Debt	$ 39,353	$ 36,774
Fair Value, Inputs, Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term Debt, Fair Value	46,004	39,398
MidAmerican Funding, LLC and Subsidiaries [Domain]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term Debt	7,448	5,619
Long-term Debt, Fair Value		$ 5,941
MidAmerican Funding, LLC and Subsidiaries [Domain] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term Debt, Fair Value	$ 8,599

Fair Value Measurements - NPC (

Fair Value Measurements - NPC (Details) - Fair Value, Recurring [Member] - USD ($) $ in Millions		Dec. 31, 2019	Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure		$ 3,897	$ 3,114
Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure		2,649	2,423
Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure		1,150	625
Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure		122	118
Commodity Contract [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets		129	148
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		(4)	(1)
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		(143)	(180)
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		(11)	(9)
Money Market Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	[1]	824	409
Money Market Funds [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	[1]	824	409
Money Market Funds [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	[1]	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]
Available-for-sale Securities	[1]	0	0
Equity Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		169	128
Equity Funds [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		169	128
Equity Funds [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		0	0
Equity Funds [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		0	0
Nevada Power Company [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure		12	112
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		12	105
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		0	7
Nevada Power Company [Member] | Commodity Contract [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets		0	7
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement		(8)	(4)
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	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	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		0	7
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement		(8)	(4)
Nevada Power Company [Member] | Money Market Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	[2]	10	104
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]
Available-for-sale Securities	[2]	10	104
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]
Available-for-sale Securities	[2]	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]
Available-for-sale Securities	[2]	0	0
Nevada Power Company [Member] | Equity Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities		2	1
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]
Available-for-sale Securities		2	1
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]
Available-for-sale Securities		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]
Available-for-sale Securities		$ 0	$ 0
[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]	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, 2019	Dec. 31, 2018	Dec. 31, 2017
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	$ 99	$ 94	$ 60
Fair Value, Measurements with Unobservable Inputs Reconciliation, Recurring Basis, Gain (Loss) Included In Regulatory Assets and Liabilities, Net	26	(3)	1
Settlements	(9)	4	(14)
Ending balance	97	99	94
Nevada Power Company [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	3	(3)	(14)
Fair Value, Measurements with Unobservable Inputs Reconciliation, Recurring Basis, Gain (Loss) Included In Regulatory Assets and Liabilities, Net	(21)	4	(3)
Settlements	10	2	14
Ending balance	$ (8)	$ 3	$ (3)

Fair Value Measurements - NPC_2

Fair Value Measurements - NPC - Debt (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term Debt	$ 39,353	$ 36,774
Fair Value, Inputs, Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term Debt, Fair Value	46,004	39,398
Nevada Power Company [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term Debt	2,351	2,353
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	$ 2,848	$ 2,651

Fair Value Measurements - SPPC

Fair Value Measurements - SPPC (Details) - Fair Value, Recurring [Member] - USD ($) $ in Millions		Dec. 31, 2019	Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure		$ 3,897	$ 3,114
Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure		2,649	2,423
Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure		1,150	625
Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure		122	118
Commodity Contract [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets		129	148
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		(4)	(1)
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		(143)	(180)
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		(11)	(9)
Money Market Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	[1]	824	409
Money Market Funds [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	[1]	824	409
Money Market Funds [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	[1]	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]
Available-for-sale Securities	[1]	0	0
Sierra Pacific Power Company [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure			47
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			45
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			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			2
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		(1)
Derivative assets			2
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
Derivative assets			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
Derivative assets			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		(1)
Derivative assets			2
Sierra Pacific Power Company [Member] | Money Market Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	[2]	25	45
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]
Available-for-sale Securities	[2]	25	45
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]
Available-for-sale Securities	[2]	0	0
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]
Available-for-sale Securities	[2]	$ 0	$ 0
[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]	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 Fair Va

Fair Value Measurements Fair Value Measurements - SPPC - Debt (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term Debt	$ 39,353	$ 36,774
Fair Value, Inputs, Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term Debt, Fair Value	46,004	39,398
Sierra Pacific Power Company [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term Debt	1,135	1,120
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	$ 1,258	$ 1,167

Other, Net - MEC (Details)

Other, Net - MEC (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Component of Other Income (Expense), Nonoperating [Line Items]
Other, net	$ 97	$ (9)	$ (420)
MidAmerican Energy Company [Member]
Component of Other Income (Expense), Nonoperating [Line Items]
Other, net	50	30	37
MidAmerican Energy Company [Member] | Defined Benefit Retirement Plans, Non-service Cost Components [Member]
Component of Other Income (Expense), Nonoperating [Line Items]
Other, net	17	21	18
MidAmerican Energy Company [Member] | Corporate Owned Life Insurance Income (Loss) [Member]
Component of Other Income (Expense), Nonoperating [Line Items]
Other, net	24	6	13
MidAmerican Energy Company [Member] | Interest Income and Other Net [Member]
Component of Other Income (Expense), Nonoperating [Line Items]
Other, net	$ 9	$ 3	$ 6

Other, Net - MidAmerican Fundin

Other, Net - MidAmerican Funding (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Component of Other Income (Expense), Nonoperating [Line Items]
Other, net	$ 97	$ (9)	$ (420)
MidAmerican Funding, LLC and Subsidiaries [Domain]
Component of Other Income (Expense), Nonoperating [Line Items]
Other, net	52	31	9
MidAmerican Funding, LLC and Subsidiaries [Domain] | Defined Benefit Retirement Plans, Non-service Cost Components [Member]
Component of Other Income (Expense), Nonoperating [Line Items]
Other, net	17	21	18
MidAmerican Funding, LLC and Subsidiaries [Domain] | Corporate Owned Life Insurance Income (Loss) [Member]
Component of Other Income (Expense), Nonoperating [Line Items]
Other, net	24	6	13
MidAmerican Funding, LLC and Subsidiaries [Domain] | Gain (Loss) on Extinguishment of Debt [Member]
Component of Other Income (Expense), Nonoperating [Line Items]
Other, net	0	0	(29)
MidAmerican Funding, LLC and Subsidiaries [Domain] | Interest Income and Other Net [Member]
Component of Other Income (Expense), Nonoperating [Line Items]
Other, net	$ 11	$ 4	$ 7

Income Taxes Income Taxes - Tax

Income Taxes Income Taxes - Tax Reform (Details) - USD ($) $ in Millions		3 Months Ended	12 Months Ended
		Mar. 31, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Components of Income Tax Expense (Benefit) [Line Items]
Current Income Tax Expense (Benefit)			$ (888)	$ (591)	$ (573)
Federal statutory income tax rate			21.00%	21.00%	35.00%
Deferred Tax Liabilities, Net			$ 9,653	$ 9,047
Regulatory Liabilities			7,311	7,506
Deferred Income Tax Expense (Benefit)			296	14	$ 26
Net income (loss) attributable to parent			2,950	2,568	2,870
Income tax benefit			(598)	(583)	(554)
Equity income (loss)			(44)	43	(151)
Reclassification of long-term income tax receivable				(609)
Long-term income tax receivable adjustments			(40)	17
Related Party Transaction, Cash Received for Income Taxes, Net			900	900	$ 636
Deferred Income Tax Charge [Member]
Components of Income Tax Expense (Benefit) [Line Items]
Regulatory Liabilities	[1]		3,611	$ 3,923
Tax Cuts and Jobs Act of 2017 [Member]
Components of Income Tax Expense (Benefit) [Line Items]
Current Income Tax Expense (Benefit)			$ 68
Federal statutory income tax rate			21.00%	21.00%
Deferred Tax Liabilities, Net	[2]		$ 7,115
Deferred Income Tax Expense (Benefit)			68
Increase (decrease) in provisional tax liabilities				$ 134
Increase (Decrease) in Deferred Income Taxes			(27)
Tax Cuts and Jobs Act of 2017 [Member] | Deferred Income Tax Charge [Member]
Components of Income Tax Expense (Benefit) [Line Items]
Regulatory Liabilities	[2]		5,950
Deferred Income Tax Expense (Benefit)	[2]	$ 1,150
Net income (loss) attributable to parent	[2]		516
Income tax benefit	[2]	1,150
Foreign Earnings Repatriated		419
Equity income (loss)		$ 228
Increase in Regulatory Liability			27
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	[3]		5,819
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			$ 79	53
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			(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]	(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. See Note 12 for further discussion of 2017 Tax Reform impacts.
[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]	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 2020.

Income Taxes - Components of In

Income Taxes - Components of Income Tax Expense (Benefit) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Current Federal Tax Expense (Benefit)	$ (956)	$ (686)	$ (653)
Current State and Local Tax Expense (Benefit)	(13)	(9)	(3)
Current foreign	81	104	83
Current Income Tax Expense (Benefit)	(888)	(591)	(573)
Deferred Federal Income Tax Expense (Benefit)	431	165	(76)
Deferred foreign	(8)	(20)	2
Deferred State and Local Income Tax Expense (Benefit)	(127)	(131)	100
Deferred Income Tax Expense (Benefit)	296	14	26
Other Tax Expense (Benefit)	(6)	(6)	(7)
Total income tax expense (benefit)	$ (598)	$ (583)	$ (554)

Income Taxes - Reconciliation o

Income Taxes - Reconciliation of Effective Income Tax Rate (Details) - USD ($) $ in Millions	12 Months Ended
	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%	35.00%
Income tax credits	(32.00%)	(30.00%)	(20.00%)
Effective Income Tax Rate Reconciliation Regulatory Differences	(6.00%)	(8.00%)	(1.00%)
State income tax, net of federal income tax benefit	(5.00%)	(6.00%)	3.00%
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Percent	(0.00%)	(4.00%)	(31.00%)
Income tax effect of foreign income	(2.00%)	(3.00%)	(5.00%)
Equity income	0.00%	(1.00%)	2.00%
Other, net	(1.00%)	(1.00%)	(1.00%)
Effective income tax rate	(25.00%)	(30.00%)	(22.00%)
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	$ 127	$ 131	$ (100)
PacifiCorp [Member]
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Abstract]
Federal statutory income tax rate	21.00%	21.00%	35.00%
Income tax credits	(3.00%)	(7.00%)	(5.00%)
Effective Income Tax Rate Reconciliation Regulatory Differences	(2.00%)	(0.00%)	1.00%
State income tax, net of federal income tax benefit	(3.00%)	(4.00%)	(3.00%)
Effective Income Tax Rate Reconciliation, Amortization of Excess Deferred Income Taxes, Percent	(11.00%)	(17.00%)	(0.00%)
Other, net	(1.00%)	0.00%	(2.00%)
Effective income tax rate	7.00%	1.00%	32.00%
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	$ (4)	$ 9	$ (15)

Income Taxes Income Taxes - Rel

Income Taxes Income Taxes - Related Party Income Taxes (Details) - USD ($) $ in Millions		Dec. 31, 2019	Dec. 31, 2018
Related Party Transaction [Line Items]
Long-term income tax receivable		$ (530)	$ (457)
Parent Company [Member]
Related Party Transaction [Line Items]
Income Taxes Receivable From (Payable To) Related Parties Current		(90)	76
Long-term income tax receivable		530	457
State and Local Jurisdiction [Member]
Related Party Transaction [Line Items]
Operating Loss Carryforwards	[1]	5,819
Iowa Senate File 2417, Rate Effective Starting 2021 [Member] | State and Local Jurisdiction [Member]
Related Party Transaction [Line Items]
Operating Loss Carryforwards		$ 79	$ 53
[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 2020.

Income Taxes - Components of Ne

Income Taxes - Components of Net Deferred Income Tax Liability (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Deferred income tax assets: [Abstract]
Federal, state and foreign carryforwards	$ 575	$ 596
Regulatory liabilities	1,610	1,674
AROs	306	232
Other	590	527
Total deferred income tax assets	3,081	3,029
Valuation allowances	(143)	(137)
Total deferred income tax assets, net	2,938	2,892
Deferred income tax liabilities: [ Abstract]
Property-related items	(10,439)	(10,185)
Regulatory assets	(631)	(656)
Investments	(1,137)	(876)
Other	(384)	(222)
Total deferred income tax liabilities	(12,591)	(11,939)
Net deferred income tax liability	$ (9,653)	$ (9,047)

Income Taxes - Summary of Opera

Income Taxes - Summary of Operating Loss Carryforwards (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Operating Loss Carryforwards [Line Items]
Current Income Tax Expense (Benefit)		$ 888	$ 591	$ 573
Federal [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	[1]	292
Deferred Tax Assets, Operating Loss Carryforwards		61
Deferred Tax Assets, Tax Credit Carryforwards		23
State and Local Jurisdiction [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	[1]	5,819
Deferred Tax Assets, Operating Loss Carryforwards		323
Deferred Tax Assets, Tax Credit Carryforwards		27
Foreign Tax Authority [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	[1]	523
Deferred Tax Assets, Operating Loss Carryforwards		141
Deferred Tax Assets, Tax Credit Carryforwards		0
Income Tax Authority, Name [Domain]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	[1]	6,634
Deferred Tax Assets, Operating Loss Carryforwards		525
Deferred Tax Assets, Tax Credit Carryforwards		$ 50
Minimum [Member] | Federal [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards, Expiration Date		Dec. 31, 2023
Tax Credit Carryforward, Expiration Date		Dec. 31, 2023
Minimum [Member] | State and Local Jurisdiction [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards, Expiration Date		Dec. 31, 2019
Tax Credit Carryforward, Expiration Date		Dec. 31, 2019
Maximum [Member] | Federal [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards, Expiration Date		Dec. 31, 2026
Maximum [Member] | State and Local Jurisdiction [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards, Expiration Date		Dec. 31, 2038
Tax Cuts and Jobs Act of 2017 [Member]
Operating Loss Carryforwards [Line Items]
Current Income Tax Expense (Benefit)		$ (68)
Deferred Income Tax Charge [Member] | Tax Cuts and Jobs Act of 2017 [Member]
Operating Loss Carryforwards [Line Items]
Increase in Regulatory Liability		$ 27
[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 2020.

Income Taxes - Net Unrecognized

Income Taxes - Net Unrecognized Tax Benefits (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Beginning balance	$ 185	$ 181
Additions based on tax positions related to the current year	3	4
Additions for tax positions of prior years	13	38
Reductions for tax positions of prior years	(37)	(38)
Statute of limitations	9	2
Settlements	(5)	(2)
Interest and penalties	(5)	0
Ending balance	145	185
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	139	154
Unrecognized tax benefits that would not impact the effective tax rate	$ 6	$ 31

Income Taxes Income Taxes - Pac

Income Taxes Income Taxes - PacifiCorp - Tax Reform (Details) - USD ($) $ in Millions		3 Months Ended	12 Months Ended
		Mar. 31, 2019	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%	35.00%
Deferred Income Tax Expense (Benefit)			$ 296	$ 14	$ 26
Deferred Tax Liabilities, Net			9,653	$ 9,047
PacifiCorp [Member]
Components of Income Tax Expense (Benefit) [Line Items]
Amortization of Excess Deferred Income Taxes, Amount			$ 91
Effective Income Tax Rate Reconciliation, Amortization of Excess Deferred Income Taxes, Percent			11.00%	17.00%	0.00%
Federal statutory income tax rate			21.00%	21.00%	35.00%
Deferred Income Tax Expense (Benefit)			$ (128)	$ (196)	$ 74
Deferred Tax Liabilities, Net			$ 2,563	$ 2,543
Tax Cuts and Jobs Act of 2017 [Member]
Components of Income Tax Expense (Benefit) [Line Items]
Federal statutory income tax rate			21.00%	21.00%
Deferred Income Tax Expense (Benefit)			$ 68
Deferred Tax Liabilities, Net	[1]		7,115
Tax Cuts and Jobs Act of 2017 [Member] | PacifiCorp [Member]
Components of Income Tax Expense (Benefit) [Line Items]
Amortization of Excess Deferred Income Taxes, Amount			$ 127
Tax Cuts and Jobs Act of 2017 [Member] | Deferred Income Tax Charge [Member]
Components of Income Tax Expense (Benefit) [Line Items]
Deferred Income Tax Expense (Benefit)	[1]	$ 1,150
[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.

Income Taxes - PacifiCorp - Com

Income Taxes - PacifiCorp - Components of Income Tax Expense (Benefit) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Schedule of Income Tax Expense (Benefit) Components [Line Items]
Current Federal Tax Expense (Benefit)	$ (956)	$ (686)	$ (653)
Current State and Local Tax Expense (Benefit)	(13)	(9)	(3)
Current Income Tax Expense (Benefit)	(888)	(591)	(573)
Deferred Federal Income Tax Expense (Benefit)	431	165	(76)
Deferred State and Local Income Tax Expense (Benefit)	(127)	(131)	100
Deferred Income Tax Expense (Benefit)	296	14	26
Other Tax Expense (Benefit)	(6)	(6)	(7)
Income tax benefit	(598)	(583)	(554)
PacifiCorp [Member]
Schedule of Income Tax Expense (Benefit) Components [Line Items]
Current Federal Tax Expense (Benefit)	158	164	249
Current State and Local Tax Expense (Benefit)	34	40	41
Current Income Tax Expense (Benefit)	192	204	290
Deferred Federal Income Tax Expense (Benefit)	(132)	(187)	59
Deferred State and Local Income Tax Expense (Benefit)	4	(9)	15
Deferred Income Tax Expense (Benefit)	(128)	(196)	74
Other Tax Expense (Benefit)	(3)	(3)	(4)
Income tax benefit	$ 61	$ 5	$ 360

Income Taxes - PacifiCorp - Rec

Income Taxes - PacifiCorp - Reconciliation of Effective Income Tax Rate (Details) - USD ($) $ in Millions	12 Months Ended
	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%	35.00%
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent	5.00%	6.00%	(3.00%)
Effective Income Tax Rate Reconciliation Regulatory Differences	(6.00%)	(8.00%)	(1.00%)
Income tax credits	(32.00%)	(30.00%)	(20.00%)
Other, net	(1.00%)	(1.00%)	(1.00%)
Effective income tax rate	(25.00%)	(30.00%)	(22.00%)
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%	35.00%
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent	3.00%	4.00%	3.00%
Effective Income Tax Rate Reconciliation, Amortization of Excess Deferred Income Taxes, Percent	(11.00%)	(17.00%)	(0.00%)
Effective Income Tax Rate Reconciliation Regulatory Differences	(2.00%)	(0.00%)	1.00%
Income tax credits	(3.00%)	(7.00%)	(5.00%)
Other, net	(1.00%)	0.00%	(2.00%)
Effective income tax rate	7.00%	1.00%	32.00%
Deferred Tax Assets, Tax Credit Carryforwards [Abstract]
Years Eligible For Renewable Energy Production Tax Credit	10 years
Amortization of Excess Deferred Income Taxes, Amount	$ 91
Tax Cuts and Jobs Act of 2017 [Member]
Schedule of Effective Income Tax Rate Reconciliation [Line Items]
Federal statutory income tax rate	21.00%	21.00%
Tax Cuts and Jobs Act of 2017 [Member] | PacifiCorp [Member]
Deferred Tax Assets, Tax Credit Carryforwards [Abstract]
Amortization of Excess Deferred Income Taxes, Amount	$ 127

Income Taxes - PacifiCorp - C_2

Income Taxes - PacifiCorp - Component of Net Deferred Income Tax Liability (Details) - USD ($) $ in Millions		Dec. 31, 2019	Dec. 31, 2018
Deferred Tax Assets and Liabilities [Line Items]
Regulatory liabilities		$ 1,610	$ 1,674
AROs		306	232
Other		590	527
Total deferred income tax assets, net		2,938	2,892
Property-related items		(10,439)	(10,185)
Regulatory assets		(631)	(656)
Other		(384)	(222)
Total deferred income tax liabilities		(12,591)	(11,939)
Net deferred income tax liability		(9,653)	(9,047)
PacifiCorp [Member]
Deferred Tax Assets and Liabilities [Line Items]
Regulatory liabilities		731	752
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits		83	91
Deferred Tax Assets, Derivative Instruments And Unamortized Contract Values		33	45
Deferred Tax Assets, Operating Loss and Tax Credit Carryforwards, State and Local		70	77
AROs		61	53
Other		68	56
Total deferred income tax assets, net		1,046	1,074
Property-related items		(3,312)	(3,335)
Regulatory assets		(276)	(273)
Other		(21)	(9)
Total deferred income tax liabilities		(3,609)	(3,617)
Net deferred income tax liability		(2,563)	$ (2,543)
Tax Cuts and Jobs Act of 2017 [Member]
Deferred Tax Assets and Liabilities [Line Items]
Net deferred income tax liability	[1]	$ (7,115)
[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.

Income Taxes - PacifiCorp - Sum

Income Taxes - PacifiCorp - Summary of Operating Loss Carryforwards (Details) $ in Millions	12 Months Ended
	Dec. 31, 2019USD ($)
State and Local Jurisdiction [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	$ 5,819	[1]
Deferred Tax Assets, Operating Loss Carryforwards	323
Deferred Tax Assets, Tax Credit Carryforwards	27
PacifiCorp [Member] | State and Local Jurisdiction [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	1,140
Deferred Tax Assets, Operating Loss Carryforwards	51
Deferred Tax Assets, Tax Credit Carryforwards	$ 19
Minimum [Member] | State and Local Jurisdiction [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards, Expiration Date	Dec. 31, 2019
Tax Credit Carryforward, Expiration Date	Dec. 31, 2019
Minimum [Member] | PacifiCorp [Member]
Operating Loss Carryforwards [Line Items]
Tax Credit Carryforward, Expiration Date	Dec. 31, 2020
Minimum [Member] | PacifiCorp [Member] | State and Local Jurisdiction [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards, Expiration Date	Dec. 31, 2023
Maximum [Member] | State and Local Jurisdiction [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards, Expiration Date	Dec. 31, 2038
Maximum [Member] | PacifiCorp [Member] | State and Local Jurisdiction [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards, Expiration Date	Dec. 31, 2032
[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 2020.

Income Taxes Income Taxes - P_2

Income Taxes Income Taxes - PacifiCorp - Net Unrecognized Tax Benefits (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Contingency [Line Items]
Unrecognized Tax Benefits	$ 145	$ 185	$ 181

Income Taxes Income Taxes - MEC

Income Taxes Income Taxes - MEC - Components of Income Tax Expense (Benefit) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Components of Income Tax Expense (Benefit) [Line Items]
Current Federal Tax Expense (Benefit)	$ (956)	$ (686)	$ (653)
Current State and Local Tax Expense (Benefit)	(13)	(9)	(3)
Current Income Tax Expense (Benefit)	(888)	(591)	(573)
Deferred Federal Income Tax Expense (Benefit)	431	165	(76)
Deferred State and Local Income Tax Expense (Benefit)	(127)	(131)	100
Deferred Income Tax Expense (Benefit)	296	14	26
Other Tax Expense (Benefit)	(6)	(6)	(7)
Income tax (benefit) expense	(598)	(583)	(554)
MidAmerican Energy Company [Member]
Components of Income Tax Expense (Benefit) [Line Items]
Current Federal Tax Expense (Benefit)	(478)	(276)	(490)
Current State and Local Tax Expense (Benefit)	(47)	(12)	(25)
Current Income Tax Expense (Benefit)	(525)	(288)	(515)
Deferred Federal Income Tax Expense (Benefit)	166	42	335
Deferred State and Local Income Tax Expense (Benefit)	(11)	(8)	(2)
Deferred Income Tax Expense (Benefit)	155	34	333
Other Tax Expense (Benefit)	(1)	(1)	(1)
Income tax (benefit) expense	$ (371)	$ (255)	$ (183)

Income Taxes Income Taxes - M_2

Income Taxes Income Taxes - MEC - Reconciliation of Effective Income Tax Rate (Details)	12 Months Ended
	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%	35.00%
Effective Income Tax Rate Reconciliation, Tax Credit, Percent	(32.00%)	(30.00%)	(20.00%)
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent	5.00%	6.00%	(3.00%)
Effective Income Tax Rate Reconciliation Regulatory Differences	(6.00%)	(8.00%)	(1.00%)
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Percent	(0.00%)	(4.00%)	(31.00%)
Other, net	(1.00%)	(1.00%)	(1.00%)
Effective income tax rate	(25.00%)	(30.00%)	(22.00%)
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%	35.00%
Effective Income Tax Rate Reconciliation, Tax Credit, Percent	(90.00%)	(73.00%)	(68.00%)
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent	(11.00%)	(4.00%)	(4.00%)
Effective Income Tax Rate Reconciliation Regulatory Differences	(8.00%)	(5.00%)	(7.00%)
Other, net	0.00%	1.00%	1.00%
Effective income tax rate	(88.00%)	(60.00%)	(43.00%)
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%	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 - Components

Income Taxes - MEC - Components of Net Deferred Income Tax Liability (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Deferred Tax Assets and Liabilities [Line Items]
Regulatory liabilities	$ 1,610	$ 1,674
AROs	306	232
Other	590	527
Total deferred income tax assets, net	2,938	2,892
Property-related items	(10,439)	(10,185)
Regulatory assets	(631)	(656)
Other	(384)	(222)
Total deferred income tax liabilities	(12,591)	(11,939)
Net deferred income tax liability	(9,653)	(9,047)
MidAmerican Energy Company [Member]
Deferred Tax Assets and Liabilities [Line Items]
Regulatory liabilities	368	405
AROs	234	164
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits	26	47
Other	71	80
Total deferred income tax assets, net	699	696
Property-related items	(3,253)	(2,945)
Regulatory assets	(68)	(61)
Other	(4)	(12)
Total deferred income tax liabilities	(3,325)	(3,018)
Net deferred income tax liability	$ (2,626)	$ (2,322)

Income Taxes - MEC - Summary of

Income Taxes - MEC - Summary of Operating Loss Carryforwards (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018
Operating Loss Carryforwards [Line Items]
Federal, state and foreign carryforwards		$ 575	$ 596
State and Local Jurisdiction [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	[1]	5,819
MidAmerican Energy Company [Member] | State and Local Jurisdiction [Member]
Operating Loss Carryforwards [Line Items]
Federal, state and foreign carryforwards		51
Operating Loss Carryforwards		$ 745
MidAmerican Energy Company [Member] | Minimum [Member]
Operating Loss Carryforwards [Line Items]
Deferred Tax Assets, Operating Loss and Tax Credit Carry Forwards, Domestic Federal and State, ExpirationDate		2020
MidAmerican Energy Company [Member] | Maximum [Member]
Operating Loss Carryforwards [Line Items]
Deferred Tax Assets, Operating Loss and Tax Credit Carry Forwards, Domestic Federal and State, ExpirationDate		2038
[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 2020.

Income Taxes - MEC - Net Unreco

Income Taxes - MEC - Net Unrecognized Tax Benefits (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Beginning balance	$ 185	$ 181
Additions based on tax positions related to the current year	3	4
Additions for tax positions of prior years	13	38
Reductions for tax positions of prior years	(37)	(38)
Statute of limitations	(9)	(2)
Settlements	(5)	(2)
Interest and penalties	(5)	0
Ending balance	145	185
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	139	154
MidAmerican Energy Company [Member]
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Beginning balance	10	12
Additions based on tax positions related to the current year	5	4
Additions for tax positions of prior years	10	47
Unrecognized Tax Benefits, Decrease Resulting from Current Period Tax Positions	(5)	(4)
Reductions for tax positions of prior years	(12)	(48)
Interest and penalties	0	(1)
Ending balance	8	$ 10
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	$ 27

Income Taxes - MidAmerican Fund

Income Taxes - MidAmerican Funding - Components of Income Tax Expense (Benefit) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Components of Income Tax Expense (Benefit) [Line Items]
Current Federal Tax Expense (Benefit)	$ (956)	$ (686)	$ (653)
Current State and Local Tax Expense (Benefit)	(13)	(9)	(3)
Current Income Tax Expense (Benefit)	(888)	(591)	(573)
Deferred Federal Income Tax Expense (Benefit)	431	165	(76)
Deferred State and Local Income Tax Expense (Benefit)	(127)	(131)	100
Deferred Income Tax Expense (Benefit)	296	14	26
Other Tax Expense (Benefit)	(6)	(6)	(7)
Income tax (benefit) expense	(598)	(583)	(554)
MidAmerican Funding, LLC and Subsidiaries [Domain]
Components of Income Tax Expense (Benefit) [Line Items]
Current Federal Tax Expense (Benefit)	(480)	(280)	(505)
Current State and Local Tax Expense (Benefit)	(49)	(14)	(31)
Current Income Tax Expense (Benefit)	(529)	(294)	(536)
Deferred Federal Income Tax Expense (Benefit)	164	42	338
Deferred State and Local Income Tax Expense (Benefit)	(11)	(9)	(3)
Deferred Income Tax Expense (Benefit)	153	33	335
Other Tax Expense (Benefit)	(1)	(1)	(1)
Income tax (benefit) expense	$ (377)	$ (262)	$ (202)

Income Taxes Income Taxes - Mid

Income Taxes Income Taxes - MidAmerican Funding - Reconciliation of Effective Income Tax Rate (Details)	12 Months Ended
	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%	35.00%
Income tax credits	(32.00%)	(30.00%)	(20.00%)
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent	5.00%	6.00%	(3.00%)
Effective Income Tax Rate Reconciliation Regulatory Differences	(6.00%)	(8.00%)	(1.00%)
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Percent	(0.00%)	(4.00%)	(31.00%)
Other, net	(1.00%)	(1.00%)	(1.00%)
Effective income tax rate	(25.00%)	(30.00%)	(22.00%)
Years Eligible For Renewable Energy Production Tax Credit	10 years
MidAmerican Funding, LLC and Subsidiaries [Domain]
Schedule of Effective Income Tax Rate Reconciliation [Line Items]
Federal statutory income tax rate	21.00%	21.00%	35.00%
Income tax credits	(94.00%)	(76.00%)	(77.00%)
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent	(12.00%)	(4.00%)	(6.00%)
Effective Income Tax Rate Reconciliation Regulatory Differences	(8.00%)	(6.00%)	(8.00%)
Other, net	0.00%	1.00%	2.00%
Effective income tax rate	(93.00%)	(64.00%)	(54.00%)
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%	21.00%

Income Taxes Income Taxes - M_3

Income Taxes Income Taxes - MidAmerican Funding - Components of Net Deferred Income Tax Liability (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018
Deferred Tax Assets and Liabilities [Line Items]
Regulatory liabilities		$ 1,610	$ 1,674
AROs		306	232
Other		590	527
Total deferred income tax assets, net		2,938	2,892
Property-related items		(10,439)	(10,185)
Regulatory assets		(631)	(656)
Other		(384)	(222)
Total deferred income tax liabilities		(12,591)	(11,939)
Net deferred income tax liability		(9,653)	(9,047)
Federal, state and foreign carryforwards		575	596
MidAmerican Funding, LLC and Subsidiaries [Domain]
Deferred Tax Assets and Liabilities [Line Items]
Regulatory liabilities		368	405
AROs		234	164
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits		26	47
Other		76	85
Total deferred income tax assets, net		704	701
Property-related items		(3,253)	(2,947)
Regulatory assets		(68)	(62)
Other		(4)	(11)
Total deferred income tax liabilities		(3,325)	(3,020)
Net deferred income tax liability		(2,621)	$ (2,319)
State and Local Jurisdiction [Member]
Deferred Tax Assets and Liabilities [Line Items]
Operating Loss Carryforwards	[1]	5,819
State and Local Jurisdiction [Member] | MidAmerican Funding, LLC and Subsidiaries [Domain]
Deferred Tax Assets and Liabilities [Line Items]
Federal, state and foreign carryforwards		51
Operating Loss Carryforwards		$ 745
Minimum [Member] | MidAmerican Funding, LLC and Subsidiaries [Domain]
Deferred Tax Assets and Liabilities [Line Items]
Deferred Tax Assets, Operating Loss and Tax Credit Carry Forwards, Domestic Federal and State, ExpirationDate		2020
Maximum [Member] | MidAmerican Funding, LLC and Subsidiaries [Domain]
Deferred Tax Assets and Liabilities [Line Items]
Deferred Tax Assets, Operating Loss and Tax Credit Carry Forwards, Domestic Federal and State, ExpirationDate		2038
[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 2020.

Income Taxes - MidAmerican Fu_2

Income Taxes - MidAmerican Funding - Net Unrecognized Tax Benefits (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Beginning balance	$ 185	$ 181
Additions based on tax positions related to the current year	3	4
Additions for tax positions of prior years	13	38
Reductions for tax positions of prior years	(37)	(38)
Statute of limitations	(9)	(2)
Settlements	(5)	(2)
Interest and penalties	(5)	0
Ending balance	145	185
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	139	154
MidAmerican Funding, LLC and Subsidiaries [Domain]
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Beginning balance	10	12
Additions based on tax positions related to the current year	5	4
Additions for tax positions of prior years	10	47
Unrecognized Tax Benefits, Decrease Resulting from Current Period Tax Positions	(5)	(4)
Reductions for tax positions of prior years	(12)	(48)
Interest and penalties	0	(1)
Ending balance	8	$ 10
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	$ 27

Income Taxes - NPC - Components

Income Taxes - NPC - Components of Income Tax Expense (Benefit) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Components of Income Tax Expense (Benefit) [Line Items]
Current federal tax expense (benefit)	$ (888)	$ (591)	$ (573)
Deferred Federal Income Tax Expense (Benefit)	431	165	(76)
Other Tax Expense (Benefit)	(6)	(6)	(7)
Income tax benefit	(598)	(583)	(554)
Nevada Power Company [Member]
Components of Income Tax Expense (Benefit) [Line Items]
Current federal tax expense (benefit)	105	84	62
Deferred Federal Income Tax Expense (Benefit)	(31)	(13)	95
Unrecognized Tax Benefits, Period Increase (Decrease)	0	2	0
Other Tax Expense (Benefit)	(1)	(1)	(1)
Income tax benefit	$ 73	$ 72	$ 156

Income Taxes - NPC - Reconcilia

Income Taxes - NPC - Reconciliation of Effective Income Tax Rate (Details)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Contingency [Line Items]
Federal statutory income tax rate	21.00%	21.00%	35.00%
Effective Income Tax Rate Reconciliation Regulatory Differences	6.00%	8.00%	1.00%
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount	0.00%	4.00%	31.00%
Other, net	(1.00%)	(1.00%)	(1.00%)
Effective income tax rate	(25.00%)	(30.00%)	(22.00%)
Nevada Power Company [Member]
Income Tax Contingency [Line Items]
Federal statutory income tax rate	21.00%	21.00%	35.00%
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Merger Charges, Percent	0.00%	3.00%	0.00%
Effective Income Tax Rate Reconciliation Regulatory Differences	0.00%	0.00%	1.00%
Other, net	1.00%	0.00%	1.00%
Effective income tax rate	22.00%	24.00%	38.00%
Tax Cuts and Jobs Act of 2017 [Member]
Income Tax Contingency [Line Items]
Federal statutory income tax rate	21.00%	21.00%
Tax Cuts and Jobs Act of 2017 [Member] | Nevada Power Company [Member]
Income Tax Contingency [Line Items]
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount	0.00%	0.00%	1.00%

Income Taxes - NPC - Componen_2

Income Taxes - NPC - Components of Net Deferred Income Tax Liability (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Deferred Tax Assets and Liabilities [Line Items]
Regulatory liabilities	$ 1,610	$ 1,674
Other	590	527
Total deferred income tax assets	3,081	3,029
Property-related items	(10,439)	(10,185)
Regulatory assets	(631)	(656)
Other	(384)	(222)
Total deferred income tax liabilities	(12,591)	(11,939)
Net deferred income tax liability	(9,653)	(9,047)
Nevada Power Company [Member]
Deferred Tax Assets and Liabilities [Line Items]
Regulatory liabilities	211	209
Deferred Tax Assets, Tax Deferred Expense, Leases	99	97
Employee benefits	14	15
Deferred Tax Assets, Customer Advances	19	18
Other	9	9
Total deferred income tax assets	352	348
Property-related items	(797)	(799)
Regulatory assets	(166)	(196)
Deferred Tax Liabilities, Tax Deferred Expense, Leases	(95)	(94)
Other	(8)	(8)
Total deferred income tax liabilities	(1,066)	(1,097)
Net deferred income tax liability	$ (714)	$ (749)

Income Taxes - SPPC - Component

Income Taxes - SPPC - Components of Income Tax Expense (Benefit) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Components of Income Tax Expense (Benefit) [Line Items]
Current Income Tax Expense (Benefit)	$ (888)	$ (591)	$ (573)
Deferred Federal Income Tax Expense (Benefit)	431	165	(76)
Other Tax Expense (Benefit)	(6)	(6)	(7)
Income tax benefit	(598)	(583)	(554)
Sierra Pacific Power Company [Member]
Components of Income Tax Expense (Benefit) [Line Items]
Current Income Tax Expense (Benefit)	19	23	0
Deferred Federal Income Tax Expense (Benefit)	10	7	56
Unrecognized Tax Benefits, Period Increase (Decrease)	0	1	0
Other Tax Expense (Benefit)	(1)	(1)	(1)
Income tax benefit	$ 28	$ 30	$ 55

Income Taxes - SPPC - Reconcili

Income Taxes - SPPC - Reconciliation of Effective Income Tax Rate (Details)	12 Months Ended
	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%	35.00%
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount	0.00%	4.00%	31.00%
Effective income tax rate	(25.00%)	(30.00%)	(22.00%)
Sierra Pacific Power Company [Member]
Schedule of Effective Income Tax Rate Reconciliation [Line Items]
Federal statutory income tax rate	21.00%	21.00%	35.00%
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Percent	0.00%	4.00%	0.00%
Effective income tax rate	21.00%	25.00%	34.00%
Tax Cuts and Jobs Act of 2017 [Member]
Schedule of Effective Income Tax Rate Reconciliation [Line Items]
Federal statutory income tax rate	21.00%	21.00%
Tax Cuts and Jobs Act of 2017 [Member] | Sierra Pacific Power Company [Member]
Schedule of Effective Income Tax Rate Reconciliation [Line Items]
Federal statutory income tax rate	21.00%		35.00%
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount	0.00%	0.00%	(1.00%)

Income Taxes - SPPC - Compone_2

Income Taxes - SPPC - Components of Net Deferred Income Tax Liability (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Deferred Tax Assets and Liabilities [Line Items]
Regulatory liabilities	$ 1,610	$ 1,674
Other	590	527
Total deferred income tax assets	3,081	3,029
Property-related items	(10,439)	(10,185)
Regulatory assets	(631)	(656)
Other	(384)	(222)
Total deferred income tax liabilities	(12,591)	(11,939)
Net deferred income tax liability	(9,653)	(9,047)
Sierra Pacific Power Company [Member]
Deferred Tax Assets and Liabilities [Line Items]
Regulatory liabilities	70	70
Employee benefits	6	10
Deferred Tax Assets, Tax Deferred Expense, Leases	13	8
Deferred Tax Assets, Customer Advances	9	8
Other	6	6
Total deferred income tax assets	104	102
Property-related items	(370)	(346)
Regulatory assets	(62)	(73)
Deferred Tax Liabilities, Tax Deferred Expense, Leases	(13)	(8)
Other	(6)	(6)
Total deferred income tax liabilities	(451)	(433)
Net deferred income tax liability	$ (347)	$ (331)

Income Taxes Income Taxes - M_4

Income Taxes Income Taxes - MidAmerican Funding - Tax Rate Change (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Rate Change [Line Items]
Deferred Tax Liabilities, Net	$ 9,653	$ 9,047
Deferred Income Tax Expense (Benefit)	296	14	$ 26
MidAmerican Funding, LLC and Subsidiaries [Domain]
Income Tax Rate Change [Line Items]
Deferred Tax Liabilities, Net	2,621	2,319
Deferred Income Tax Expense (Benefit)	153	$ 33	$ 335
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 Income Taxes - M_5

Income Taxes Income Taxes - MEC - Tax Rate Change (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Rate Change [Line Items]
Deferred Tax Liabilities, Net	$ 9,653	$ 9,047
Deferred Income Tax Expense (Benefit)	296	14	$ 26
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	2,626	2,322
Deferred Income Tax Expense (Benefit)	$ 155	$ 34	$ 333

Supplemental Cash Flow Disclo_3

Supplemental Cash Flow Disclosures (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Supplemental Cash Flow Information [Abstract]
Cash and cash equivalents		$ 1,040	$ 627
Restricted Cash and Cash Equivalents, Current		212	227
Restricted Cash and Cash Equivalents, Noncurrent		16	29
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents		1,268	883	$ 1,283	$ 1,003
Interest paid, net of amounts capitalized		1,723	1,713	1,715
Income Taxes Paid, Net	[1]	(850)	(780)	(540)
Capital Expenditures Incurred but Not yet Paid		888	823	653
Capital Expenditures Incurred Deferred Payments		0	0	100
Related Party Transaction, Cash Received for Income Taxes, Net		$ 900	$ 900	$ 636
[1]	Includes $942 million, $884 million and $636 million of income taxes received from Berkshire Hathaway in 2019, 2018 and 2017, respectively.

Supplemental Cash Flow Disclo_4

Supplemental Cash Flow Disclosures - PacifiCorp (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Condensed Cash Flow Statements, Captions [Line Items]
Cash and cash equivalents		$ 1,040	$ 627
Interest paid, net of amounts capitalized		1,723	1,713	$ 1,715
Income Taxes Paid, Net	[1]	(850)	(780)	(540)
Accruals related to property, plant and equipment additions		888	823	653
Restricted Cash and Cash Equivalents, Current		212	227
Restricted Cash and Cash Equivalents, Noncurrent		16	29
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents		1,268	883	1,283	$ 1,003
PacifiCorp [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Cash and cash equivalents		30	77
Interest paid, net of amounts capitalized		340	347	350
Income Taxes Paid, Net		171	144	340
Accruals related to property, plant and equipment additions		293	184	147
Restricted Cash and Cash Equivalents, Current		4	13
Restricted Cash and Cash Equivalents, Noncurrent		2	2
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents		$ 36	$ 92	$ 29	$ 33
[1]	Includes $942 million, $884 million and $636 million of income taxes received from Berkshire Hathaway in 2019, 2018 and 2017, respectively.

Supplemental Cash Flow Disclo_5

Supplemental Cash Flow Disclosures - MEC (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Condensed Income Statements, Captions [Line Items]
Cash and cash equivalents		$ 1,040	$ 627
Restricted Cash and Cash Equivalents, Current		212	227
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents		1,268	883	$ 1,283	$ 1,003
Interest paid, net of amounts capitalized		1,723	1,713	1,715
Income taxes received, net	[1]	850	780	540
Accruals related to property, plant and equipment additions		888	823	653
MidAmerican Energy Company [Member]
Condensed Income Statements, Captions [Line Items]
Cash and cash equivalents		287	0
Restricted Cash and Cash Equivalents, Current		43	56
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents		330	56	282	$ 26
Interest paid, net of amounts capitalized		224	198	193
Income taxes received, net		450	494	465
Accruals related to property, plant and equipment additions		$ 337	$ 371	$ 224
[1]	Includes $942 million, $884 million and $636 million of income taxes received from Berkshire Hathaway in 2019, 2018 and 2017, respectively.

Supplemental Cash Flow Disclo_6

Supplemental Cash Flow Disclosures - MidAmerican Funding (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Condensed Cash Flow Statements, Captions [Line Items]
Cash and cash equivalents		$ 1,040	$ 627
Restricted Cash and Cash Equivalents, Current		212	227
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents		1,268	883	$ 1,283	$ 1,003
Interest paid, net of amounts capitalized		1,723	1,713	1,715
Income taxes received, net	[1]	850	780	540
Accruals related to property, plant and equipment additions		888	823	653
MidAmerican Funding, LLC and Subsidiaries [Domain]
Condensed Cash Flow Statements, Captions [Line Items]
Cash and cash equivalents		288	1
Restricted Cash and Cash Equivalents, Current		43	56
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents		331	57	282	$ 27
Interest paid, net of amounts capitalized		245	218	218
Income taxes received, net		456	511	472
Accruals related to property, plant and equipment additions		337	$ 371	$ 224
Property, Plant and Equipment [Member] | MidAmerican Funding, LLC and Subsidiaries [Domain]
Condensed Cash Flow Statements, Captions [Line Items]
Dividend, Noncash, Transfer Of Asset		$ 8
[1]	Includes $942 million, $884 million and $636 million of income taxes received from Berkshire Hathaway in 2019, 2018 and 2017, respectively.

Supplemental Cash Flow Disclo_7

Supplemental Cash Flow Disclosures - NPC (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Condensed Cash Flow Statements, Captions [Line Items]
Cash and cash equivalents	$ 1,040	$ 627
Restricted Cash and Cash Equivalents, Current	212	227
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	1,268	883	$ 1,283	$ 1,003
Interest paid, net of amounts capitalized	1,723	1,713	1,715
Accruals related to property, plant and equipment additions	888	823	653
Nevada Power Company [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Cash and cash equivalents	15	111
Restricted Cash and Cash Equivalents, Current	10	10
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	25	121	66	$ 290
Interest paid, net of amounts capitalized	126	166	167
Income Taxes Paid	113	117	89
Accruals related to property, plant and equipment additions	$ 49	$ 34	$ 18

Supplemental Cash Flow Disclo_8

Supplemental Cash Flow Disclosures - SPPC (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Condensed Cash Flow Statements, Captions [Line Items]
Cash and cash equivalents	$ 1,040	$ 627
Restricted Cash and Cash Equivalents, Current	212	227
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	1,268	883	$ 1,283	$ 1,003
Interest paid, net of amounts capitalized	1,723	1,713	1,715
Accruals related to property, plant and equipment additions	888	823	653
Sierra Pacific Power Company [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Cash and cash equivalents	27	71
Restricted Cash and Cash Equivalents, Current	5	5
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	32	76	8	$ 60
Interest paid, net of amounts capitalized	41	41	40
Income Taxes Paid	37	19	0
Accruals related to property, plant and equipment additions	$ 18	$ 15	$ 10

Related Party Transactions - Pa

Related Party Transactions - PacifiCorp (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Related Party Transaction [Line Items]
Related Party Transaction, Cash Received for Income Taxes, Net	$ 900	$ 900	$ 636
PacifiCorp [Member] | Affiliated Entity [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Selling, General and Administrative Expenses from Transactions with Related Party	10	12	11
Due to Affiliate, Current			0
PacifiCorp [Member] | Subsidiary of Common Parent [Member]
Related Party Transaction [Line Items]
Due to Affiliate, Current		0	0
Purchases from Related Party	7	8	6
PacifiCorp [Member] | BNSF Railway Company [Member]
Related Party Transaction [Line Items]
Due to Affiliate, Current	1	3
Purchases from Related Party	35	33	35
PacifiCorp [Member] | MEHC Insurance Services Ltd. [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Proceeds From Insurance Claims	0	0	0
PacifiCorp [Member] | BHE [Member]
Related Party Transaction [Line Items]
Income Taxes Receivable From (Payable To) Related Parties Current	(31)	(10)
Related Party Transaction, Cash Received for Income Taxes, Net	(171)	(144)	(340)
PacifiCorp [Member] | Equity Method Investee [Member]
Related Party Transaction [Line Items]
Due to Affiliate, Current	12	13
Purchases from Related Party	$ 155	$ 163	$ 170

Related Party Transactions Re_2

Related Party Transactions Related Party Transactions - MEC (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Related Party Transaction [Line Items]
Related Party Transaction, Cash Received for Income Taxes, Net	$ 900	$ 900	$ 636
MidAmerican Energy Company [Member] | Affiliated Entity [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Expense Reimbursement	43	51	53
Due from Affiliate, Current	6	8
Due to Affiliate, Current	11	12
Due from Affiliate, Noncurrent	23	20
Due to Affiliate, Noncurrent	47	36
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	14	11	9
Income Taxes Receivable From (Payable To) Related Parties Current	(82)	(156)
Related Party Transaction, Cash Received for Income Taxes, Net	450	494	465
MidAmerican Energy Company [Member] | Northern Natural Gas and BNSF Railway Company [Member]
Related Party Transaction [Line Items]
Purchases from Related Party	$ 139	$ 127	$ 122

Related Party Transactions - Mi

Related Party Transactions - MidAmerican Funding (Details) $ in Millions		12 Months Ended
		Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)	Dec. 31, 2017USD ($)
Related Party Transaction [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	[1]	$ 9,412	$ 9,114
Related Party Transaction, Cash Received for Income Taxes, Net		900	900	$ 636
MidAmerican Funding, LLC and Subsidiaries [Domain]
Related Party Transaction [Line Items]
Notes Payable, Related Parties, Current		$ 171	156
Maximum Debt to Capitalization Ratio		0.67
Minumum Interest Coverage Ratio		2.2
MidAmerican Funding, LLC and Subsidiaries [Domain] | Affiliated Entity [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Expense Reimbursement		$ 41	44	46
Due from Affiliate, Current		7	5
Due to Affiliate, Current		11	12
Due from Affiliate, Noncurrent		23	20
Due to Affiliate, Noncurrent		47	36
MidAmerican Funding, LLC and Subsidiaries [Domain] | 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		14	11	9
Income Taxes Receivable From (Payable To) Related Parties Current		(83)	(156)
Related Party Transaction, Cash Received for Income Taxes, Net		456	511	472
MidAmerican Funding, LLC and Subsidiaries [Domain] | Northern Natural Gas and BNSF Railway Company [Member]
Related Party Transaction [Line Items]
Purchases from Related Party		139	127	$ 122
MidAmerican Funding, LLC and Subsidiaries [Domain] | 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		$ 171	$ 156
Debt, Weighted Average Interest Rate		1.944%	2.629%
MidAmerican Funding, LLC and Subsidiaries [Domain] | 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
MidAmerican Funding, LLC and Subsidiaries [Domain] | Revolving Credit Arrangement, $100 million [Member] | Line of Credit [Member] | MHC, Inc. [Member] | MEHC [Member]
Related Party Transaction [Line Items]
Debt, Weighted Average Interest Rate		0.00%	0.00%
Property, Plant and Equipment [Member] | MidAmerican Funding, LLC and Subsidiaries [Domain]
Related Party Transaction [Line Items]
Dividend, Noncash, Transfer Of Asset		$ 8
[1]	(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, 2019	Dec. 31, 2018	Dec. 31, 2017
Related Party Transaction [Line Items]
Related Party Transaction, Cash Received for Income Taxes, Net	$ 900	$ 900	$ 636
Nevada Power Company [Member] | Berkshire Hathaway Energy [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]
Purchases from Related Party	52	58	66
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	14	15	17
Due to Affiliate	0	0
Due from Affiliates	3	5
Related Party Transaction, Expense Reimbursement	26	28	27
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	7	10
Due to Affiliate	26	26
Due from Affiliates	0	0
Related Party Transaction, Expense Reimbursement	0	1	0
Income Taxes Receivable From (Payable To) Related Parties Current	7	(4)
Related Party Transaction, Cash Received for Income Taxes, Net	113	117	89
Nevada Power Company [Member] | Electric Distribution [Member] | PacifiCorp [Member]
Related Party Transaction [Line Items]
Purchases from Related Party	0	0	0
Due to Affiliate	0	0
Revenue from Related Parties	2	3	3
Due from Affiliates	0	0
Nevada Power Company [Member] | Electric Distribution [Member] | Sierra Pacific Power Company [Member]
Related Party Transaction [Line Items]
Purchases from Related Party	25	28	21
Due to Affiliate	1	1
Revenue from Related Parties	84	91	$ 104
Due from Affiliates	$ 5	$ 6

Related Party Transactions - SP

Related Party Transactions - SPPC (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Related Party Transaction [Line Items]
Related Party Transaction, Cash Received for Income Taxes, Net	$ 900,000,000	$ 900,000,000	$ 636,000,000
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	26,000,000	28,000,000	27,000,000
Due from Affiliates	0	0
Due to Affiliate	3,000,000	5,000,000
Related Party Transaction, Expense Reimbursement	14,000,000	15,000,000	17,000,000
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	4,000,000	4,000,000	5,000,000
Due from Affiliates	0	0
Due to Affiliate	15,000,000	15,000,000
Income Taxes Receivable From (Payable To) Related Parties Current	14,000,000	(3,000,000)
Related Party Transaction, Cash Received for Income Taxes, Net	37,000,000	19,000,000	0
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	1,000,000	1,000,000	1,000,000
Sierra Pacific Power Company [Member] | Electric Distribution [Member] | Nevada Power Company [Member]
Related Party Transaction [Line Items]
Revenue from Related Parties	25,000,000	28,000,000	21,000,000
Due from Affiliates	1,000,000	1,000,000
Purchases from Related Party	84,000,000	91,000,000	$ 104,000,000
Due to Affiliate	$ 5,000,000	$ 6,000,000

Employee Benefit Plans - Net Pe

Employee Benefit Plans - Net Periodic Benefit Cost (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
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	$ (1)	1
Defined Benefit Plan, Service Cost	16	21	$ 24
Defined Benefit Plan, Interest Cost	111	105	116
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(154)	(164)	(160)
Defined Benefit Plan, Accumulated Benefit Obligation, (Increase) Decrease for Settlement and Curtailment	0	21	0
Defined Benefit Plan Net Amortization	31	28	25
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	4	11	5
Pension Plan [Member] | UNITED STATES | MidAmerican Energy Company [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	6	9	9
Defined Benefit Plan, Interest Cost	30	28	31
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(41)	(44)	(44)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement		(1)
Defined Benefit Plan Net Amortization	1	2	2
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	(4)	(6)	(2)
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)	(8)	(9)	(6)
Pension Plan [Member] | UNITED KINGDOM
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	16	19	23
Defined Benefit Plan, Interest Cost	49	56	58
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(100)	(101)	(100)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement	(26)	(44)	(31)
Defined Benefit Plan Net Amortization	46	45	63
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	37	63	75
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	(6)	(7)
Defined Benefit Plan, Service Cost	8	9	9
Defined Benefit Plan, Interest Cost	27	24	29
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(40)	(41)	(40)
Defined Benefit Plan, Accumulated Benefit Obligation, (Increase) Decrease for Settlement and Curtailment	0	0	0
Defined Benefit Plan Net Amortization	(6)	(13)	(14)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	(11)	(21)	(16)
Other Postretirement Benefits Plan [Member] | MidAmerican Energy Company [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	5	5	5
Defined Benefit Plan, Interest Cost	10	8	9
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(13)	(13)	(14)
Defined Benefit Plan Net Amortization	(3)	(4)	(4)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	(1)	(4)	(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)	$ 1	$ (2)	$ (1)

Employee Benefit Plans - Funded

Employee Benefit Plans - Funded Status (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2019	Dec. 31, 2018
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Defined Benefit Plan, Benefit Obligation, Increase (Decrease) for Plan Amendment	$ 0	$ 8,000,000
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Defined Benefit Plan, Plan Assets, Amount	742,000,000	664,000,000	$ 736,000,000	$ 742,000,000	$ 664,000,000
Defined Benefit Plan, Benefit Obligation	673,000,000	672,000,000	721,000,000	673,000,000	672,000,000
Defined Benefit Plan, Funded (Unfunded) Status of Plan				69,000,000	(8,000,000)
Other assets				76,000,000	5,000,000
Other current liabilities				0	0
Liability, Defined Benefit Plan, Noncurrent				(7,000,000)	(13,000,000)
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position				69,000,000	(8,000,000)
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	664,000,000	736,000,000
Defined Benefit Plan, Plan Assets, Contributions by Employer	2,000,000	8,000,000
Defined Benefit Plan, Contributions by Plan Participants (Deprecated 2017-01-31)	9,000,000	8,000,000
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss)	122,000,000	(38,000,000)
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)	(55,000,000)	(50,000,000)
Ending balance	742,000,000	664,000,000	736,000,000
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Beginning balance	672,000,000	721,000,000
Defined Benefit Plan, Service Cost	8,000,000	9,000,000	9,000,000
Defined Benefit Plan, Interest Cost	27,000,000	24,000,000	29,000,000
Defined Benefit Plan, Contributions by Plan Participants (Deprecated 2017-01-31)	9,000,000	8,000,000
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)	12,000,000	(40,000,000)
Defined Benefit Plan, Benefit Obligation, Increase (Decrease) for Plan Amendment	0	0
Benefits Paid	(55,000,000)	(50,000,000)
Ending balance	673,000,000	672,000,000	721,000,000
Defined Benefit Plan, Benefit Obligation, Payment for Settlement	0	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				417,000,000	126,000,000
Defined Benefit Plan, Pension Plan with Projected Benefit Obligation in Excess of Plan Assets, Projected Benefit Obligation				429,000,000	143,000,000
Defined Benefit Plan, Plan with Accumulated Benefit Obligation in Excess of Plan Assets, Plan Assets				439,000,000	417,000,000
Defined Benefit Plan, Pension Plan with Accumulated Benefit Obligation in Excess of Plan Assets, Projected Benefit Obligation				446,000,000	429,000,000
Supplemental Employee Retirement Plan [Member]
Defined Benefit Plans, Supplemental Employee Retirement Plans [Abstract]
Life Insurance, Corporate or Bank Owned, Amount				252,000,000	256,000,000
UNITED STATES | Pension Plan [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Defined Benefit Plan, Plan Assets, Amount	2,656,000,000	2,396,000,000	2,761,000,000	2,656,000,000	2,396,000,000
Defined Benefit Plan, Benefit Obligation	2,878,000,000	2,718,000,000	3,006,000,000	2,878,000,000	2,718,000,000
Defined Benefit Plan, Funded (Unfunded) Status of Plan				(222,000,000)	(322,000,000)
Other assets				73,000,000	20,000,000
Other current liabilities				(13,000,000)	(13,000,000)
Liability, Defined Benefit Plan, Noncurrent				(282,000,000)	(329,000,000)
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position				(222,000,000)	(322,000,000)
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	2,396,000,000	2,761,000,000
Defined Benefit Plan, Plan Assets, Contributions by Employer	12,000,000	38,000,000
Defined Benefit Plan, Contributions by Plan Participants (Deprecated 2017-01-31)	0	0
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss)	456,000,000	(147,000,000)
Defined Benefit Plan, Accumulated Benefit Obligation, (Increase) Decrease for Settlement and Curtailment	0	21,000,000	0
Defined Benefit Plan, Plan Assets, Payment for Settlement	(22,000,000)	(119,000,000)
Defined Benefit Plan, Benefits Paid (Deprecated 2017-01-31)	(186,000,000)	(137,000,000)
Ending balance	2,656,000,000	2,396,000,000	2,761,000,000
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Beginning balance	2,718,000,000	3,006,000,000
Defined Benefit Plan, Service Cost	16,000,000	21,000,000	24,000,000
Defined Benefit Plan, Interest Cost	111,000,000	105,000,000	116,000,000
Defined Benefit Plan, Contributions by Plan Participants (Deprecated 2017-01-31)	0	0
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)	242,000,000	(160,000,000)
Defined Benefit Plan, Benefit Obligation, Increase (Decrease) for Plan Amendment	(1,000,000)	2,000,000
Benefits Paid	(186,000,000)	(137,000,000)
Ending balance	2,878,000,000	2,718,000,000	3,006,000,000
Defined Benefit Plan, Accumulated Benefit Obligation				2,867,000,000	2,709,000,000
Defined Benefit Plan, Benefit Obligation, Payment for Settlement	(22,000,000)	(119,000,000)
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				1,752,000,000	2,016,000,000
Defined Benefit Plan, Pension Plan with Projected Benefit Obligation in Excess of Plan Assets, Projected Benefit Obligation				2,091,000,000	2,327,000,000
Defined Benefit Plan, Pension Plan with Projected Benefit Obligation in Excess of Plan Assets, Accumulated Benefit Obligation				2,085,000,000	2,316,000,000
Defined Benefit Plan, Plan with Accumulated Benefit Obligation in Excess of Plan Assets, Plan Assets				1,939,000,000	1,752,000,000
Defined Benefit Plan, Pension Plan with Accumulated Benefit Obligation in Excess of Plan Assets, Projected Benefit Obligation				2,227,000,000	2,091,000,000
Defined Benefit Plan, Plan with Accumulated Benefit Obligation in Excess of Plan Assets, Accumulated Benefit Obligation				2,222,000,000	2,085,000,000
UNITED KINGDOM | Pension Plan [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Defined Benefit Plan, Plan Assets, Amount	2,151,000,000	1,989,000,000	2,368,000,000	2,151,000,000	1,989,000,000
Defined Benefit Plan, Benefit Obligation	2,019,000,000	1,833,000,000	2,201,000,000	2,019,000,000	1,833,000,000
Defined Benefit Plan, Funded (Unfunded) Status of Plan				132,000,000	156,000,000
Other assets				132,000,000	156,000,000
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	1,989,000,000	2,368,000,000
Defined Benefit Plan, Plan Assets, Contributions by Employer	56,000,000	60,000,000
Defined Benefit Plan, Contributions by Plan Participants (Deprecated 2017-01-31)	1,000,000	1,000,000
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss)	194,000,000	(44,000,000)
Defined Benefit Plan, Plan Assets, Payment for Settlement	(99,000,000)	(205,000,000)
Defined Benefit Plan, Benefits Paid (Deprecated 2017-01-31)	(71,000,000)	(71,000,000)
Foreign Currency Exchange Rate Changes	(81,000,000)	(120,000,000)
Ending balance	2,151,000,000	1,989,000,000	2,368,000,000
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Beginning balance	1,833,000,000	2,201,000,000
Defined Benefit Plan, Service Cost	16,000,000	19,000,000	23,000,000
Defined Benefit Plan, Interest Cost	49,000,000	56,000,000	58,000,000
Defined Benefit Plan, Contributions by Plan Participants (Deprecated 2017-01-31)	1,000,000	1,000,000
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)	175,000,000	(87,000,000)
Benefits Paid	(71,000,000)	(71,000,000)
Foreign currency exchange rate changes	115,000,000	(112,000,000)
Ending balance	2,019,000,000	1,833,000,000	$ 2,201,000,000
Defined Benefit Plan, Accumulated Benefit Obligation				$ 1,786,000,000	$ 1,637,000,000
Defined Benefit Plan, Benefit Obligation, Payment for Settlement	$ (99,000,000)	$ (182,000,000)

Employee Benefit Plans - Unreco

Employee Benefit Plans - Unrecognized Amounts (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2019	Dec. 31, 2018
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, Prior Service Cost (Credit), before Tax				$ (6)	$ (8)
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Before Tax	$ 549	$ 480		549	480
Beginning balance	480
Ending balance	549	480
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Net Prior Service Cost (Credit), Before Tax				(14)	(22)
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Regulatory Deferrals, Before Tax				6	7
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Before Tax	(31)	35	$ (16)	(31)	35
Beginning balance	35	(16)
Defined Benefit Plan, Net Unamortized Gain (Loss) Arising During Period, Before Tax	72	38	(1)
Defined Benefit Plan, Accumulated Benefit Obligation, (Increase) Decrease for Settlement and Curtailment	0	0	0
Defined Benefit Plan, Net Amortization Recognized in Net Periodic Benefit Cost Before Tax	6	(13)
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Arising During Period, Before Tax	(66)	51
Ending balance	(31)	35	(16)
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	4	44	10	4	44
Beginning balance	44	10
Defined Benefit Plan, Net Unamortized Gain (Loss) Arising During Period, Before Tax	(45)	23
Defined Benefit Plan, Net Amortization Recognized in Net Periodic Benefit Cost Before Tax	5	(11)
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Arising During Period, Before Tax	(40)	34
Ending balance	4	44	10
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	(32)	(10)	(26)	(32)	(10)
Beginning balance	(10)	(26)
Defined Benefit Plan, Net Unamortized Gain (Loss) Arising During Period, Before Tax	23	14
Defined Benefit Plan, Net Amortization Recognized in Net Periodic Benefit Cost Before Tax	(1)	(2)
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Arising During Period, Before Tax	(22)	16
Ending balance	(32)	(10)	(26)
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	(3)	1		(3)	1
Beginning balance	1
Defined Benefit Plan, Net Unamortized Gain (Loss) Arising During Period, Before Tax	4
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Arising During Period, Before Tax	(4)
Ending balance	(3)	1
Pension Plan [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Net Unamortized Prior Service Cost Arising During Period, Before Tax	(2)
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Net Prior Service Cost (Credit), Before Tax				(2)	0
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Regulatory Deferrals, Before Tax				1	(1)
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Before Tax	652	746	642	652	746
Beginning balance	746	642
Defined Benefit Plan, Net Unamortized Gain (Loss) Arising During Period, Before Tax	61	(151)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit), Net		2
Defined Benefit Plan, Accumulated Benefit Obligation, (Increase) Decrease for Settlement and Curtailment	0	21	0
Defined Benefit Plan, Net Amortization Recognized in Net Periodic Benefit Cost Before Tax	31	28
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Arising During Period, Before Tax	(94)	104
Ending balance	652	746	642
Defined Benefit Plan, Reconciliation of Amounts Not Yet Recognized As Components of Net Periodic Benefit Cost [Roll Forward]
Defined Benefit Plan, Amortization of Prior Service Cost (Credit), Net		2
Other Comprehensive Income (Loss), Defined Benefit Plan, Settlement and Curtailment Gain (Loss), before Tax		(21)
Pension Plan [Member] | UNITED STATES | Regulatory Asset, Pension and Other Postretirement Costs [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Net Unamortized Prior Service Cost Arising During Period, Before Tax	0
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Before Tax	661	730	665	661	730
Beginning balance	730	665
Defined Benefit Plan, Net Unamortized Gain (Loss) Arising During Period, Before Tax	(38)	114
Defined Benefit Plan, Amortization of Prior Service Cost (Credit), Net		0
Defined Benefit Plan, Net Amortization Recognized in Net Periodic Benefit Cost Before Tax	(31)	28
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Arising During Period, Before Tax	(69)	65
Ending balance	661	730	665
Defined Benefit Plan, Reconciliation of Amounts Not Yet Recognized As Components of Net Periodic Benefit Cost [Roll Forward]
Defined Benefit Plan, Amortization of Prior Service Cost (Credit), Net		0
Other Comprehensive Income (Loss), Defined Benefit Plan, Settlement and Curtailment Gain (Loss), before Tax		(21)
Pension Plan [Member] | UNITED STATES | Regulatory Liability, Pension and Other Postretirement Costs [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Net Unamortized Prior Service Cost Arising During Period, Before Tax	0
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Before Tax	(33)	0	(43)	(33)	0
Beginning balance	0	(43)
Defined Benefit Plan, Net Unamortized Gain (Loss) Arising During Period, Before Tax	33	43
Defined Benefit Plan, Amortization of Prior Service Cost (Credit), Net		0
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	(33)	43
Ending balance	(33)	0	(43)
Defined Benefit Plan, Reconciliation of Amounts Not Yet Recognized As Components of Net Periodic Benefit Cost [Roll Forward]
Defined Benefit Plan, Amortization of Prior Service Cost (Credit), Net		0
Other Comprehensive Income (Loss), Defined Benefit Plan, Settlement and Curtailment Gain (Loss), before Tax		0
Pension Plan [Member] | UNITED STATES | Accumulated Other Comprehensive Income (Loss) [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Net Unamortized Prior Service Cost Arising During Period, Before Tax	2
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Before Tax	24	16	20	24	16
Beginning balance	16	20
Defined Benefit Plan, Net Unamortized Gain (Loss) Arising During Period, Before Tax	10	6
Defined Benefit Plan, Amortization of Prior Service Cost (Credit), Net		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	8	(4)
Ending balance	24	16	20
Defined Benefit Plan, Reconciliation of Amounts Not Yet Recognized As Components of Net Periodic Benefit Cost [Roll Forward]
Defined Benefit Plan, Amortization of Prior Service Cost (Credit), Net		2
Other Comprehensive Income (Loss), Defined Benefit Plan, Settlement and Curtailment Gain (Loss), before Tax		0
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				543	472
Pension Plan [Member] | UNITED KINGDOM | Accumulated Other Comprehensive Income (Loss) [Member]
Defined Benefit Plan Disclosure [Line Items]
Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment and Tax	69	(30)
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, before Tax	(81)	59
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), before Tax	0	8
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Before Tax	549	480	510	$ 549	$ 480
Beginning balance	480	510
Defined Benefit Plan, Net Amortization Recognized in Net Periodic Benefit Cost Before Tax	46	(45)
Foreign currency exchange rate changes	60	(30)
Ending balance	549	480	$ 510
Defined Benefit Plan, Reconciliation of Amounts Not Yet Recognized As Components of Net Periodic Benefit Cost [Roll Forward]
Other Comprehensive Income (Loss), Defined Benefit Plan, Settlement and Curtailment Gain (Loss), before Tax	$ (26)	$ (22)

Employee Benefit Plans - Plan A

Employee Benefit Plans - Plan Assumptions (Details)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Health Care Cost Trend Rate Assumed, Next Fiscal Year	6.50%	6.80%
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
Pension Plan [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	3.32%	4.25%	3.60%
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	3.22%	3.38%	2.49%
Interest Crediting Rates for Cash Balance Plan, Third Year	2.94%	3.54%	3.06%
Interest Crediting Rates for Cash Balance Plan, Fourth Year	3.02%	3.56%	2.72%
Interest Crediting Rates for Cash Balance Plan, Fifth Year		3.56%	2.72%
Interest Crediting Rates for Cash Balance Plan, Sixth Year			2.72%
Interest Crediting Rates for Cash Balance Plan, Second Year	2.94%	3.54%	3.06%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	4.25%	3.60%	4.06%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets	6.48%	6.36%	6.55%
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	2.10%	2.90%	2.60%
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Rate of Compensation Increase	3.30%	3.55%	3.45%
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Expected Rate Of Future Price Inflation	2.80%	3.05%	2.95%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	2.90%	2.60%	2.70%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets	5.10%	4.90%	5.00%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase	3.55%	3.45%	3.00%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Rate of Future Price Inflation	3.05%	2.95%	3.00%
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	3.24%	4.21%	3.57%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	4.21%	3.57%	4.01%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets	6.39%	6.44%	6.73%
PacifiCorp [Member] | Pension Plan [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	3.25%	4.25%	3.60%
Interest Crediting Rates for Cash Balance Plan, Fourth Year	2.70%
Interest crediting rates for cash balance plan	2.27%	3.40%	1.61%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	4.25%	3.60%	4.05%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets	7.00%	7.00%	7.25%
PacifiCorp [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	3.20%	4.25%	3.60%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	4.25%	3.60%	4.05%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets	6.86%	6.86%	7.25%
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		2.26%
Interest Crediting Rates for Cash Balance Plan, Fourth Year		3.15%	1.60%
Interest Crediting Rates for Cash Balance Plan, Second Year	2.27%	3.40%	2.26%
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, Third Year	3.15%	2.78%
Interest Crediting Rates for Cash Balance Plan, Fourth Year		3.25%	2.60%
Interest Crediting Rates for Cash Balance Plan, Second Year	2.16%		2.78%

Employee Benefit Plans - Contri

Employee Benefit Plans - Contributions and Benefit Payments (Details) - Dec. 31, 2019 £ in Millions, $ in Millions	USD ($)	GBP (£)
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Expected Future Benefit Payment, Next Twelve Months	$ 57
Defined Benefit Plan, Expected Future Benefit Payment, Year Two	56
Defined Benefit Plan, Expected Future Benefit Payment, Year Three	55
Defined Benefit Plan, Expected Future Benefit Payment, Year Four	54
Defined Benefit Plan, Expected Future Benefit Payment, Year Five	51
Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter	224
UNITED KINGDOM | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year | £		£ 43
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	436
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	233
Defined Benefit Plan, Expected Future Benefit Payment, Year Two	218
Defined Benefit Plan, Expected Future Benefit Payment, Year Three	213
Defined Benefit Plan, Expected Future Benefit Payment, Year Four	212
Defined Benefit Plan, Expected Future Benefit Payment, Year Five	205
Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter	$ 927

Employee Benefit Plans - Asset

Employee Benefit Plans - Asset Allocations (Details)		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018
Other Postretirement Benefits Plan [Member] | Equity Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Percentage of Investment Funds Comprised Of Equity Securitites		58.00%	65.00%
Percentage of Investment Funds Comprised Of Debt Securities		42.00%	35.00%
UNITED STATES | Pension Plan [Member] | Equity Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Percentage of Investment Funds Comprised Of Equity Securitites		62.00%	59.00%
Percentage of Investment Funds Comprised Of Debt Securities		38.00%	41.00%
UNITED KINGDOM | Pension Plan [Member] | Equity Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Percentage of Investment Funds Comprised Of Equity Securitites		38.00%	36.00%
Percentage of Investment Funds Comprised Of Debt Securities		62.00%	64.00%
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		.50
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		.35
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		.05
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		.55
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		.40
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		.15
PacifiCorp [Member] | Other Postretirement Benefits Plan [Member] | Equity Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Percentage of Investment Funds Comprised Of Equity Securitites		56.00%	59.00%
Percentage of Investment Funds Comprised Of Debt Securities		44.00%	41.00%
PacifiCorp [Member] | UNITED STATES | Pension Plan [Member] | Equity Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Percentage of Investment Funds Comprised Of Equity Securitites		55.00%
Percentage of Investment Funds Comprised Of Debt Securities		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],[3]	0.33
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],[3]	0.62
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	[3]	0.01
PacifiCorp [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		0.00
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],[3]	0.30
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],[3]	0.48
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	[3]	0.06
PacifiCorp [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		0.00
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],[3]	0.37
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],[3]	0.66
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	[3]	0.03
PacifiCorp [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		0.00
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],[3]	0.43
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],[3]	0.65
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	[3]	0.12
PacifiCorp [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		0.00
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	[1]	0.25
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	[1]	0.45
MidAmerican Energy Company [Member] | 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		0.00
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		0.00
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	[1]	0.20
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	[1]	0.60
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		0.02
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		0.00
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	[1]	0.45
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	[1]	0.80
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		0.00
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		0.05
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	[1]	0.50
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	[1]	0.80
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		0.08
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		0.03
NV Energy, Inc. [Member] | Other Postretirement Benefits Plan [Member] | Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Target Plan Asset Allocations Range Minimum	[1]	4000.00%
NV Energy, Inc. [Member] | Other Postretirement Benefits Plan [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Target Plan Asset Allocations Range Minimum	[1]	6000.00%
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	[1]	0.53
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	[1]	0.23
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	[1]	0.77
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	[1]	0.47
[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]	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.
[3]	PacifiCorp's Retirement Plan trust 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 - Fair V

Employee Benefit Plans - Fair Value Measurements (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2019		Dec. 31, 2018		Dec. 31, 2017	Dec. 31, 2016
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss)		$ 122		$ (38)
Defined Benefit Plan, Plan Assets, Payment for Settlement		0		0
Defined Benefit Plan, Plan Assets, Amount		742		664		$ 736
Other Postretirement Benefits Plan [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		433		389
Other Postretirement Benefits Plan [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		135		120
Other Postretirement Benefits Plan [Member] | Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		18		12
Other Postretirement Benefits Plan [Member] | Cash Equivalents [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		17		10	[1]
Other Postretirement Benefits Plan [Member] | Cash Equivalents [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		1		2	[1]
Other Postretirement Benefits Plan [Member] | US Treasury Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		23		13
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		23		13
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]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		44		42
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		44		42
Other Postretirement Benefits Plan [Member] | Municipal Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		57		45
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		57		45
Other Postretirement Benefits Plan [Member] | US Government-sponsored Enterprises Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		33		30
Other Postretirement Benefits 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		0
Other Postretirement Benefits 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		33		30
Other Postretirement Benefits Plan [Member] | Domestic Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		151		158
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		151		158	[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]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		6		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		6		6	[1]
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		0
Other Postretirement Benefits Plan [Member] | Equity Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		$ 236		$ 203
Percentage of Investment Funds Comprised Of Equity Securitites		58.00%		65.00%
Percentage of Investment Funds Comprised Of Debt Securities		42.00%		35.00%
Percentage Of Investment Funds Invested in United States Securities		75.00%		79.00%
Percentage Of Investment Funds Invested In International Securities		25.00%		21.00%
Other Postretirement Benefits Plan [Member] | Equity Funds [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		$ 236		$ 202
Other Postretirement Benefits Plan [Member] | Equity Funds [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0		1
Other Postretirement Benefits Plan [Member] | Plan Asset Categories Excluding Investments Measured with a NAV excluding the Practical Expedient [Domain]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		568		509
Other Postretirement Benefits Plan [Member] | Accounting Standards Update 2015-07 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		742		664
Other Postretirement Benefits Plan [Member] | Accounting Standards Update 2015-07 [Member] | Equity Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		169		149	[2]
Other Postretirement Benefits Plan [Member] | Accounting Standards Update 2015-07 [Member] | Limited Partnership Interests [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		5		6
UNITED STATES | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss)		456		(147)
Defined Benefit Plan, Plan Assets, Payment for Settlement		(22)		(119)
Defined Benefit Plan, Plan Assets, Amount		2,656		2,396		2,761
UNITED STATES | Pension Plan [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		1,045		887
UNITED STATES | Pension Plan [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		561		572	[3]
UNITED STATES | Pension Plan [Member] | Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		63		49
UNITED STATES | Pension Plan [Member] | Cash Equivalents [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		27		8
UNITED STATES | Pension Plan [Member] | Cash Equivalents [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		36		41
UNITED STATES | Pension Plan [Member] | US Treasury Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		210		160
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		210		160
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	[3]
UNITED STATES | Pension Plan [Member] | Debt Security, Government, Non-US [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		5		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		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		5		5	[3]
UNITED STATES | Pension Plan [Member] | Corporate Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		376		373
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	[3]
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		376		373	[3]
UNITED STATES | Pension Plan [Member] | Municipal Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		28		29
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	[3]
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		28		29
UNITED STATES | Pension Plan [Member] | US Government-sponsored Enterprises Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		115		123
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		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		123
UNITED STATES | Pension Plan [Member] | Domestic Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		548		493
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		547		492	[3]
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		1		1	[3]
UNITED STATES | Pension Plan [Member] | Foreign Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		136		108
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		108
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		0		0	[3]
UNITED STATES | Pension Plan [Member] | Equity Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		$ 125		$ 119	[4]
Percentage of Investment Funds Comprised Of Equity Securitites		62.00%		59.00%
Percentage of Investment Funds Comprised Of Debt Securities		38.00%		41.00%
Percentage Of Investment Funds Invested in United States Securities		66.00%		73.00%
Percentage Of Investment Funds Invested In International Securities		34.00%		27.00%
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		$ 125		$ 119	[3],[4]
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		0
UNITED STATES | Pension Plan [Member] | Plan Asset Categories Excluding Investments Measured with a NAV excluding the Practical Expedient [Domain]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		1,606		1,459
UNITED STATES | Pension Plan [Member] | Accounting Standards Update 2015-07 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		2,656		2,396
UNITED STATES | Pension Plan [Member] | Accounting Standards Update 2015-07 [Member] | Equity Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		915		792	[4]
UNITED STATES | Pension Plan [Member] | Accounting Standards Update 2015-07 [Member] | Limited Partnership Interests [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		93		104	[5]
UNITED STATES | Pension Plan [Member] | Accounting Standards Update 2015-07 [Member] | Real Estate Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		42		41
UNITED KINGDOM | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss)		194		(44)
Defined Benefit Plan, Plan Assets, Payment for Settlement		(99)		(205)
Defined Benefit Plan, Plan Assets, Amount		2,151		1,989		2,368
Defined Benefit Plan, Plan Assets, Foreign Currency Translation Gain (Loss)		81		120
UNITED KINGDOM | Pension Plan [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	[6]	963		894
UNITED KINGDOM | Pension Plan [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		842		756
UNITED KINGDOM | Pension Plan [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	[6]	243		239
UNITED KINGDOM | Pension Plan [Member] | Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		27		62
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		3		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]	24		59
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] | United Kingdom Government Obligations [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		960		891
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		960		891
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] | Equity Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	[7]	$ 818		$ 697
Percentage of Investment Funds Comprised Of Equity Securitites		38.00%		36.00%
Percentage of Investment Funds Comprised Of Debt Securities		62.00%		64.00%
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		818		697
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] | Real Estate Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		243		239
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		243	[6]	239	[6]	230	$ 105
Defined Benefit Plan, Plan Assets Level 3 Reconciliation, Increase (Decrease) for Actual Return (Loss) on Plan Assets Still Held		(5)		23		6
Defined Benefit Plan, Plan Assets Level 3 Reconciliation, Increase (Decrease) for Purchase, Sale, and Settlement		0		0		104
Defined Benefit Plan, Plan Assets, Foreign Currency Translation Gain (Loss)		9		(14)		$ 15
UNITED KINGDOM | Pension Plan [Member] | Plan Asset Categories Excluding Investments Measured with a NAV excluding the Practical Expedient [Domain]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		2,048		1,889
UNITED KINGDOM | Pension Plan [Member] | Accounting Standards Update 2015-07 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		2,151		1,989
UNITED KINGDOM | Pension Plan [Member] | Accounting Standards Update 2015-07 [Member] | Equity Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	[7]	$ 103		$ 100
[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 58% and 42%, respectively, for 2019 and 65% and 35%, respectively, for 2018. Additionally, these funds are invested in United States and international securities of approximately 75% and 25%, respectively, for 2019 and 79% and 21%, respectively, for 2018.
[3]	Refer to Note 15 for additional discussion regarding the three levels of the fair value hierarchy.
[4]	Investment funds are comprised of mutual funds and collective trust funds. These funds consist of equity and debt securities of approximately 62% and 38%, respectively, for 2019 and 59% and 41%, respectively, for 2018. Additionally, these funds are invested in United States and international securities of approximately 66% and 34%, respectively, for 2019 and 73% and 27%, respectively, for 2018.
[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 38% and 62%, respectively, for 2019 and 36% and 64%, respectively, for 2018.

Employee Benefit Plans - Level

Employee Benefit Plans - Level 3 Rollforward (Details) - UNITED KINGDOM - Pension Plan [Member] - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2019		Dec. 31, 2018		Dec. 31, 2017
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance		$ 1,989		$ 2,368
Foreign Currency Exchange Rate Changes		81		120
Ending balance		2,151		1,989		$ 2,368
Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	[1]	239
Ending balance	[1]	243		239
Real Estate Funds [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance		239
Ending balance		243		239
Real Estate Funds [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance		239	[1]	230		105
Defined Benefit Plan, Plan Assets Level 3 Reconciliation, Increase (Decrease) for Actual Return (Loss) on Plan Assets Still Held		(5)		23		6
Defined Benefit Plan, Plan Assets Level 3 Reconciliation, Increase (Decrease) for Purchase, Sale, and Settlement		0		0		104
Foreign Currency Exchange Rate Changes		9		(14)		15
Ending balance		$ 243	[1]	$ 239	[1]	$ 230
[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, 2019	Dec. 31, 2018	Dec. 31, 2017
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Contribution Plan, Cost	$ 115	$ 112	$ 103

Employee Benefit Plans - Pacifi

Employee Benefit Plans - PacifiCorp - Net Periodic Benefit Cost (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
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	8	9	9
Defined Benefit Plan, Interest Cost	27	24	29
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(40)	(41)	(40)
Defined Benefit Plan Net Amortization	(6)	(13)	(14)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	(11)	(21)	(16)
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	12	11	14
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(21)	(21)	(21)
Defined Benefit Plan Net Amortization	0	(6)	(6)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	(7)	(14)	(11)
UNITED STATES | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Accumulated Benefit Obligation, (Increase) Decrease for Settlement and Curtailment	0	21	0
Defined Benefit Plan, Plan Assets, Payment for Settlement	22	119
Defined Benefit Plan, Service Cost	16	21	24
Defined Benefit Plan, Interest Cost	111	105	116
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(154)	(164)	(160)
Defined Benefit Plan Net Amortization	31	28	25
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	4	11	5
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	22	0
Defined Benefit Plan, Plan Assets, Payment for Settlement	0	52
Defined Benefit Plan, Service Cost	0	0	0
Defined Benefit Plan, Interest Cost	44	43	49
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(67)	(72)	(72)
Defined Benefit Plan Net Amortization	11	13	14
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	$ (12)	$ 6	$ (9)

Employee Benefit Plans - Paci_2

Employee Benefit Plans - PacifiCorp - Funded Status (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	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	$ 664	$ 736
Defined Benefit Plan, Plan Assets, Contributions by Employer	2	8
Defined Benefit Plan, Contributions by Plan Participants (Deprecated 2017-01-31)	9	8
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss)	122	(38)
Defined Benefit Plan, Plan Assets, Payment for Settlement	0	0
Defined Benefit Plan, Benefits Paid (Deprecated 2017-01-31)	(55)	(50)
Ending balance	742	664	$ 736
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Beginning balance	672	721
Defined Benefit Plan, Service Cost	8	9	9
Defined Benefit Plan, Interest Cost	27	24	29
Defined Benefit Plan, Contributions by Plan Participants (Deprecated 2017-01-31)	9	8
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)	12	(40)
Defined Benefit Plan, Benefits Paid (Deprecated 2017-01-31)	(55)	(50)
Defined Benefit Plan, Benefit Obligation	672	721	721	$ 673	$ 672
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Defined Benefit Plan, Funded (Unfunded) Status of Plan				69	(8)
Assets for Plan Benefits, Defined Benefit Plan				76	5
Other current liabilities				0	0
Liability, Defined Benefit Plan, Noncurrent				(7)	(13)
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position				69	(8)
Supplemental Employee Retirement Plan [Member]
Defined Benefit Plans, Supplemental Employee Retirement Plans [Abstract]
Life Insurance, Corporate or Bank Owned, Amount				252	256
PacifiCorp [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	297	332
Defined Benefit Plan, Plan Assets, Contributions by Employer	1	1
Defined Benefit Plan, Contributions by Plan Participants (Deprecated 2017-01-31)	5	5
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss)	55	(16)
Defined Benefit Plan, Benefits Paid (Deprecated 2017-01-31)	(24)	(25)
Ending balance	334	297	332
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Beginning balance	298	331
Defined Benefit Plan, Service Cost	2	2	2
Defined Benefit Plan, Interest Cost	12	11	14
Defined Benefit Plan, Contributions by Plan Participants (Deprecated 2017-01-31)	5	5
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)	11	(26)
Defined Benefit Plan, Benefits Paid (Deprecated 2017-01-31)	(24)	(25)
Defined Benefit Plan, Benefit Obligation	298	331	331	304	298
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Defined Benefit Plan, Funded (Unfunded) Status of Plan				30	(1)
Assets for Plan Benefits, Defined Benefit Plan				30	0
Other current liabilities				0	0
Liability, Defined Benefit Plan, Noncurrent				0	(1)
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position				30	(1)
PacifiCorp [Member] | Supplemental Employee Retirement Plan [Member]
Defined Benefit Plans, Supplemental Employee Retirement Plans [Abstract]
Life Insurance, Corporate or Bank Owned, Amount				57	52
UNITED STATES | Pension Plan [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	2,396	2,761
Defined Benefit Plan, Plan Assets, Contributions by Employer	12	38
Defined Benefit Plan, Contributions by Plan Participants (Deprecated 2017-01-31)	0	0
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss)	456	(147)
Defined Benefit Plan, Plan Assets, Payment for Settlement	(22)	(119)
Defined Benefit Plan, Benefits Paid (Deprecated 2017-01-31)	(186)	(137)
Ending balance	2,656	2,396	2,761
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Beginning balance	2,718	3,006
Defined Benefit Plan, Service Cost	16	21	24
Defined Benefit Plan, Interest Cost	111	105	116
Defined Benefit Plan, Contributions by Plan Participants (Deprecated 2017-01-31)	0	0
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)	242	(160)
Defined Benefit Plan, Benefits Paid (Deprecated 2017-01-31)	(186)	(137)
Defined Benefit Plan, Benefit Obligation	2,718	3,006	3,006	2,878	2,718
Defined Benefit Plan, Accumulated Benefit Obligation				2,867	2,709
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Defined Benefit Plan, Funded (Unfunded) Status of Plan				(222)	(322)
Assets for Plan Benefits, Defined Benefit Plan				73	20
Other current liabilities				(13)	(13)
Liability, Defined Benefit Plan, Noncurrent				(282)	(329)
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position				(222)	(322)
UNITED STATES | PacifiCorp [Member] | Pension Plan [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	942	1,111
Defined Benefit Plan, Plan Assets, Contributions by Employer	4	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)	181	(52)
Defined Benefit Plan, Plan Assets, Payment for Settlement	0	(52)
Defined Benefit Plan, Benefits Paid (Deprecated 2017-01-31)	(91)	(69)
Ending balance	1,036	942	1,111
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Beginning balance	1,105	1,251
Defined Benefit Plan, Service Cost	0	0	0
Defined Benefit Plan, Interest Cost	44	43	49
Defined Benefit Plan, Contributions by Plan Participants (Deprecated 2017-01-31)	0	0
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)	109	(68)
Defined Benefit Plan, Benefits Paid (Deprecated 2017-01-31)	(91)	(69)
Defined Benefit Plan, Benefit Obligation	$ 1,105	$ 1,251	$ 1,251	1,167	1,105
Defined Benefit Plan, Accumulated Benefit Obligation				1,167	1,105
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Defined Benefit Plan, Funded (Unfunded) Status of Plan				(131)	(163)
Assets for Plan Benefits, Defined Benefit Plan				7	3
Other current liabilities				(4)	(4)
Liability, Defined Benefit Plan, Noncurrent				(134)	(162)
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position				(131)	(163)
Cash and Cash Equivalents [Member] | PacifiCorp [Member] | Supplemental Employee Retirement Plan [Member]
Defined Benefit Plans, Supplemental Employee Retirement Plans [Abstract]
Life Insurance, Corporate or Bank Owned, Amount				0	1
Other Noncurrent Assets [Member] | PacifiCorp [Member] | Supplemental Employee Retirement Plan [Member]
Defined Benefit Plans, Supplemental Employee Retirement Plans [Abstract]
Life Insurance, Corporate or Bank Owned, Amount				$ 57	$ 51

Employee Benefit Plans - Paci_3

Employee Benefit Plans - PacifiCorp - Unrecognized Amounts (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Before Tax	$ 549	$ 480
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	(23)	50
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Net Prior Service Cost (Credit), Before Tax	(14)	(22)
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Regulatory Deferrals, Before Tax	6	7
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Before Tax	(31)	35	$ (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	72	38	(1)
Defined Benefit Plan, Net Amortization Recognized in Net Periodic Benefit Cost Before Tax	6	(13)
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Arising During Period, Before Tax	(66)	51
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	4	44	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	(45)	23
Defined Benefit Plan, Net Amortization Recognized in Net Periodic Benefit Cost Before Tax	5	(11)
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Arising During Period, Before Tax	(40)	34
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	(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	4
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Arising During Period, Before Tax	(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	(26)	(2)
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Regulatory Deferrals, Before Tax	6	7
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Before Tax	(20)	5
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	(20)	5	(11)
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	(25)	10
Defined Benefit Plan, Net Amortization Recognized in Net Periodic Benefit Cost Before Tax	0	6
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Arising During Period, Before Tax	(25)	16
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	653	747
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Net Prior Service Cost (Credit), Before Tax	(2)	0
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Regulatory Deferrals, Before Tax	1	(1)
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Before Tax	652	746	642
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	61	(151)
Defined Benefit Plan, Net Amortization Recognized in Net Periodic Benefit Cost Before Tax	31	28
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Arising During Period, Before Tax	(94)	104
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	661	730	665
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	(38)	114
Defined Benefit Plan, Net Amortization Recognized in Net Periodic Benefit Cost Before Tax	(31)	28
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Arising During Period, Before Tax	(69)	65
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	24	16	20
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	6
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	8	(4)
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	442	461
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Regulatory Deferrals, Before Tax	1	(1)
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Before Tax	443	460	438
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	(6)	57
Defined Benefit Plan, Net Amortization Recognized in Net Periodic Benefit Cost Before Tax	(11)	(13)
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Arising During Period, Before Tax	(17)	22
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	422	443	418
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	(11)	59
Defined Benefit Plan, Net Amortization Recognized in Net Periodic Benefit Cost Before Tax	(10)	(12)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement		22
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Arising During Period, Before Tax	(21)	25
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	21	17	$ 20
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	(2)
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		0
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Arising During Period, Before Tax	$ 4	$ (3)

Employee Benefit Plans - Paci_4

Employee Benefit Plans - PacifiCorp - Plan Assumptions (Details)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	3.24%	4.21%	3.57%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	4.21%	3.57%	4.01%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets	6.39%	6.44%	6.73%
Other Postretirement Benefits Plan [Member] | PacifiCorp [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	3.20%	4.25%	3.60%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	4.25%	3.60%	4.05%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets	6.86%	6.86%	7.25%
UNITED STATES | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Interest Crediting Rates for Cash Balance Plan, Second Year	2.94%	3.54%	3.06%
Interest Crediting Rates for Cash Balance Plan, Fourth Year	3.02%	3.56%	2.72%
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	3.32%	4.25%	3.60%
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	4.25%	3.60%	4.06%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets	6.48%	6.36%	6.55%
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	2.94%	3.54%	3.06%
UNITED STATES | Pension Plan [Member] | PacifiCorp [Member]
Defined Benefit Plan Disclosure [Line Items]
Interest Crediting Rates for Cash Balance Plan, Fourth Year	2.70%
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	3.25%	4.25%	3.60%
Interest crediting rates for cash balance plan	2.27%	3.40%	1.61%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	4.25%	3.60%	4.05%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets	7.00%	7.00%	7.25%
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	2.16%		2.78%
Interest Crediting Rates for Cash Balance Plan, Fourth Year		3.25%	2.60%
Interest Crediting Rates for Cash Balance Plan, Third Year	3.15%	2.78%
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	2.27%	3.40%	2.26%
Interest Crediting Rates for Cash Balance Plan, Fourth Year		3.15%	1.60%
Interest Crediting Rates for Cash Balance Plan, Third Year		2.26%

Employee Benefit Plans - Paci_5

Employee Benefit Plans - PacifiCorp - Contributions and Benefit Payments (Details) $ in Millions	Dec. 31, 2019USD ($)
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Expected Future Benefit Payment, Next Twelve Months	$ 57
Defined Benefit Plan, Expected Future Benefit Payment, Year Two	56
Defined Benefit Plan, Expected Future Benefit Payment, Year Three	55
Defined Benefit Plan, Expected Future Benefit Payment, Year Four	54
Defined Benefit Plan, Expected Future Benefit Payment, Year Five	51
Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter	224
Other Postretirement Benefits Plan [Member] | PacifiCorp [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year	0
Defined Benefit Plan, Expected Future Benefit Payment, Next Twelve Months	27
Defined Benefit Plan, Expected Future Benefit Payment, Year Two	24
Defined Benefit Plan, Expected Future Benefit Payment, Year Three	23
Defined Benefit Plan, Expected Future Benefit Payment, Year Four	23
Defined Benefit Plan, Expected Future Benefit Payment, Year Five	21
Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter	94
Defined Benefit Plan, Expected Future Employer Contributions, Current Fiscal Year	0
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	233
Defined Benefit Plan, Expected Future Benefit Payment, Year Two	218
Defined Benefit Plan, Expected Future Benefit Payment, Year Three	213
Defined Benefit Plan, Expected Future Benefit Payment, Year Four	212
Defined Benefit Plan, Expected Future Benefit Payment, Year Five	205
Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter	927
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	112
Defined Benefit Plan, Expected Future Benefit Payment, Year Two	98
Defined Benefit Plan, Expected Future Benefit Payment, Year Three	94
Defined Benefit Plan, Expected Future Benefit Payment, Year Four	89
Defined Benefit Plan, Expected Future Benefit Payment, Year Five	83
Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter	$ 350

Employee Benefit Plans - Paci_6

Employee Benefit Plans - PacifiCorp - Asset Allocations (Details) - PacifiCorp [Member]	12 Months Ended
	Dec. 31, 2019
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	0.33	[1],[2],[3]
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	0.62	[1],[2],[3]
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	0.01	[3]
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	0.00
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	0.37	[1],[2],[3]
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	0.66	[1],[2],[3]
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	0.03	[3]
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	0.00
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	0.30	[1],[2],[3]
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	0.48	[1],[2],[3]
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	0.06	[3]
UNITED STATES | Minimum [Member] | Pension Plan [Member] | Other Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description	0.00
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	0.43	[1],[2],[3]
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	0.65	[1],[2],[3]
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	0.12	[3]
UNITED STATES | Maximum [Member] | Pension Plan [Member] | Other Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description	0.00
[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]	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.
[3]	PacifiCorp's Retirement Plan trust 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, 2019	Dec. 31, 2018		Dec. 31, 2017
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		$ 742	$ 664		$ 736
Defined Benefit Plan, Benefit Obligation		673	672		721
Other Postretirement Benefits Plan [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		433	389
Other Postretirement Benefits Plan [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		135	120
Other Postretirement Benefits Plan [Member] | Plan Asset Categories Excluding Investments Measured with a NAV excluding the Practical Expedient [Domain]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		568	509
Other Postretirement Benefits Plan [Member] | Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		18	12
Other Postretirement Benefits Plan [Member] | Cash Equivalents [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		17	10	[1]
Other Postretirement Benefits Plan [Member] | Cash Equivalents [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		1	2	[1]
Other Postretirement Benefits Plan [Member] | US Treasury Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		23	13
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		23	13
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]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		44	42
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		44	42
Other Postretirement Benefits Plan [Member] | Municipal Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		57	45
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		57	45
Other Postretirement Benefits Plan [Member] | US Government-sponsored Enterprises Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		33	30
Other Postretirement Benefits 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	0
Other Postretirement Benefits 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		33	30
Other Postretirement Benefits Plan [Member] | Domestic Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		151	158
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		151	158	[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]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		6	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		6	6	[1]
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	0
Other Postretirement Benefits Plan [Member] | Equity Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		$ 236	$ 203
Percentage of Investment Funds Comprised Of Equity Securitites		58.00%	65.00%
Percentage of Investment Funds Comprised Of Debt Securities		42.00%	35.00%
Percentage Of Investment Funds Invested in United States Securities		75.00%	79.00%
Percentage Of Investment Funds Invested In International Securities		25.00%	21.00%
Other Postretirement Benefits Plan [Member] | Equity Funds [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		$ 236	$ 202
Other Postretirement Benefits Plan [Member] | Equity Funds [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	1
Other Postretirement Benefits Plan [Member] | PacifiCorp [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		334	297		332
Defined Benefit Plan, Benefit Obligation		304	298		331
Other Postretirement Benefits Plan [Member] | PacifiCorp [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		142	132
Other Postretirement Benefits Plan [Member] | PacifiCorp [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		51	43
Other Postretirement Benefits Plan [Member] | PacifiCorp [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] | Plan Asset Categories Excluding Investments Measured with a NAV excluding the Practical Expedient [Domain]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		193	175
Other Postretirement Benefits Plan [Member] | PacifiCorp [Member] | Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		9	5
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	4
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]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		12	3
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		12	3
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]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		26	23
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		26	23
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]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		2	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		2	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]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		22	17
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		22	17
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]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		74	83
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		74	83
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]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		4	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	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	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	0
Other Postretirement Benefits Plan [Member] | PacifiCorp [Member] | Equity Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		$ 44	$ 38
Percentage of Investment Funds Comprised Of Equity Securitites		56.00%	59.00%
Percentage of Investment Funds Comprised Of Debt Securities		44.00%	41.00%
Percentage Of Investment Funds Invested in United States Securities		79.00%	90.00%
Percentage Of Investment Funds Invested In International Securities		21.00%	10.00%
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	$ 38
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	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	0
Other Postretirement Benefits Plan [Member] | Accounting Standards Update 2015-07 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		742	664
Other Postretirement Benefits Plan [Member] | Accounting Standards Update 2015-07 [Member] | Equity Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		169	149	[2]
Other Postretirement Benefits Plan [Member] | Accounting Standards Update 2015-07 [Member] | Limited Partnership Interests [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		5	6
Other Postretirement Benefits Plan [Member] | Accounting Standards Update 2015-07 [Member] | PacifiCorp [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		334	297
Other Postretirement Benefits Plan [Member] | Accounting Standards Update 2015-07 [Member] | PacifiCorp [Member] | Equity Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	[3]	136	116
Other Postretirement Benefits Plan [Member] | Accounting Standards Update 2015-07 [Member] | PacifiCorp [Member] | Limited Partnership Interests [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	[4]	5	6
UNITED STATES | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		2,656	2,396		2,761
Defined Benefit Plan, Benefit Obligation		2,878	2,718		3,006
Defined Benefit Plan, Accumulated Benefit Obligation		2,867	2,709
UNITED STATES | Pension Plan [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		1,045	887
UNITED STATES | Pension Plan [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		561	572	[5]
UNITED STATES | Pension Plan [Member] | Plan Asset Categories Excluding Investments Measured with a NAV excluding the Practical Expedient [Domain]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		1,606	1,459
UNITED STATES | Pension Plan [Member] | Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		63	49
UNITED STATES | Pension Plan [Member] | Cash Equivalents [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		27	8
UNITED STATES | Pension Plan [Member] | Cash Equivalents [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		36	41
UNITED STATES | Pension Plan [Member] | US Treasury Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		210	160
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		210	160
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	[5]
UNITED STATES | Pension Plan [Member] | Debt Security, Government, Non-US [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		5	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	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		5	5	[5]
UNITED STATES | Pension Plan [Member] | Corporate Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		376	373
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	[5]
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		376	373	[5]
UNITED STATES | Pension Plan [Member] | Municipal Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		28	29
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	[5]
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		28	29
UNITED STATES | Pension Plan [Member] | US Government-sponsored Enterprises Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		115	123
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	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	123
UNITED STATES | Pension Plan [Member] | Domestic Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		548	493
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		547	492	[5]
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		1	1	[5]
UNITED STATES | Pension Plan [Member] | Foreign Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		136	108
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	108
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		0	0	[5]
UNITED STATES | Pension Plan [Member] | Equity Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		$ 125	$ 119	[6]
Percentage of Investment Funds Comprised Of Equity Securitites		62.00%	59.00%
Percentage of Investment Funds Comprised Of Debt Securities		38.00%	41.00%
Percentage Of Investment Funds Invested in United States Securities		66.00%	73.00%
Percentage Of Investment Funds Invested In International Securities		34.00%	27.00%
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		$ 125	$ 119	[5],[6]
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	0
UNITED STATES | Pension Plan [Member] | PacifiCorp [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		1,036	942		1,111
Defined Benefit Plan, Benefit Obligation		1,167	1,105		$ 1,251
Defined Benefit Plan, Accumulated Benefit Obligation		1,167	1,105
UNITED STATES | Pension Plan [Member] | PacifiCorp [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		446	400
UNITED STATES | Pension Plan [Member] | PacifiCorp [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		170	153
UNITED STATES | Pension Plan [Member] | PacifiCorp [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] | Plan Asset Categories Excluding Investments Measured with a NAV excluding the Practical Expedient [Domain]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		616	553
UNITED STATES | Pension Plan [Member] | PacifiCorp [Member] | Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		24	11
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		24	11
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]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		21	4
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		21	4
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] | Corporate Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		94	88
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		94	88
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] | Municipal Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		10	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		10	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] | US Government-sponsored Enterprises Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		42	43
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	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	43
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	0
UNITED STATES | Pension Plan [Member] | PacifiCorp [Member] | Domestic Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		355	327
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		355	327
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]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		15	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	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	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	0
UNITED STATES | Pension Plan [Member] | PacifiCorp [Member] | Equity Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		$ 55	$ 54
Percentage of Investment Funds Comprised Of Equity Securitites		55.00%
Percentage of Investment Funds Comprised Of Debt Securities		45.00%
Percentage Of Investment Funds Invested in United States Securities		51.00%	68.00%
Percentage Of Investment Funds Invested In International Securities		49.00%	32.00%
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	$ 54
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	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	0
UNITED STATES | Pension Plan [Member] | PacifiCorp [Member] | Limited Partnership Interests [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] | Accounting Standards Update 2015-07 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		2,656	2,396
UNITED STATES | Pension Plan [Member] | Accounting Standards Update 2015-07 [Member] | Equity Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		915	792	[6]
UNITED STATES | Pension Plan [Member] | Accounting Standards Update 2015-07 [Member] | Limited Partnership Interests [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		93	104	[7]
UNITED STATES | Pension Plan [Member] | Accounting Standards Update 2015-07 [Member] | PacifiCorp [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount			942
UNITED STATES | Pension Plan [Member] | Accounting Standards Update 2015-07 [Member] | PacifiCorp [Member] | Equity Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	[3]	327	285
UNITED STATES | Pension Plan [Member] | Accounting Standards Update 2015-07 [Member] | PacifiCorp [Member] | Limited Partnership Interests [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	[4]	$ 93	$ 104
[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 58% and 42%, respectively, for 2019 and 65% and 35%, respectively, for 2018. Additionally, these funds are invested in United States and international securities of approximately 75% and 25%, respectively, for 2019 and 79% and 21%, respectively, for 2018.
[3]	Investment funds are substantially comprised of mutual funds and collective trust funds. These funds consist of equity and debt securities of approximately 55% and 45% respectively, for both 2019 and 2018, and are invested in United States and international securities of approximately 51% and 49%, respectively, for 2019 and 68% and 32%, respectively, for 2018.
[4]	Limited partnership interests include several funds that invest primarily in real estate, buyout, growth equity and venture capital.
[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 62% and 38%, respectively, for 2019 and 59% and 41%, respectively, for 2018. Additionally, these funds are invested in United States and international securities of approximately 66% and 34%, respectively, for 2019 and 73% and 27%, respectively, for 2018.
[7]	Limited partnership interests include several funds that invest primarily in real estate, buyout, growth equity and venture capital.

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, 2019	Jun. 30, 2019	Dec. 31, 2018	Jun. 30, 2018	Dec. 31, 2017	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Defined Benefit Plan Disclosure [Line Items]
Joint Trustee Plan, Percentage By Which Joint Trustee Plan was at Least Funded			0.00%		80.00%				80.00%
Joint Trustee Plan, Period Contributions	[1]	$ 7		$ 7		$ 7
UMWA Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Multiemployer Plans, Withdrawal Obligation, Most Recent Estimate		$ 115
Multiemployer Plans, Certified Zone Status [Fixed List]							Red	Red	Red
[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 Employee

Employee Benefit Plans Employee Benefit Plans - PacifiCorp - Defined Contribution Plans (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
PacifiCorp [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Contribution Plan, Cost	$ 40	$ 39	$ 39
Pension Plan [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Interest Crediting Rates for Cash Balance Plan, Second Year	2.94%	3.54%	3.06%
Interest Crediting Rates for Cash Balance Plan, Fourth Year	3.02%	3.56%	2.72%
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year	$ 13
Defined Benefit Plan, Plan Assets, Payment for Settlement	$ 22	$ 119
Pension Plan [Member] | UNITED STATES | PacifiCorp [Member]
Defined Benefit Plan Disclosure [Line Items]
Interest Crediting Rates for Cash Balance Plan, Fourth Year	2.70%
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year	$ 4
Defined Benefit Plan, Plan Assets, Payment for Settlement	0	52
Supplemental Employee Retirement Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Life Insurance, Corporate or Bank Owned, Amount	252	256
Supplemental Employee Retirement Plan [Member] | PacifiCorp [Member]
Defined Benefit Plan Disclosure [Line Items]
Life Insurance, Corporate or Bank Owned, Amount	57	52
Cash and Cash Equivalents [Member] | Supplemental Employee Retirement Plan [Member] | PacifiCorp [Member]
Defined Benefit Plan Disclosure [Line Items]
Life Insurance, Corporate or Bank Owned, Amount	0	1
Other Noncurrent Assets [Member] | Supplemental Employee Retirement Plan [Member] | PacifiCorp [Member]
Defined Benefit Plan Disclosure [Line Items]
Life Insurance, Corporate or Bank Owned, Amount	$ 57	$ 51

Employee Benefit Plans - MEC -

Employee Benefit Plans - MEC - Net Periodic Benefit Cost (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
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	$ 8	9	$ 9
Defined Benefit Plan, Interest Cost	27	24	29
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(40)	(41)	(40)
Defined Benefit Plan Net Amortization	(6)	(13)	(14)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	(11)	(21)	(16)
Other Postretirement Benefits Plan [Member] | MidAmerican Energy Company [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	5	5	5
Defined Benefit Plan, Interest Cost	10	8	9
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(13)	(13)	(14)
Defined Benefit Plan Net Amortization	(3)	(4)	(4)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	(1)	(4)	(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)	1	(2)	(1)
UNITED STATES | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	16	21	24
Defined Benefit Plan, Interest Cost	111	105	116
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(154)	(164)	(160)
Defined Benefit Plan Net Amortization	31	28	25
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	4	11	5
UNITED STATES | Pension Plan [Member] | MidAmerican Energy Company [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	6	9	9
Defined Benefit Plan, Interest Cost	30	28	31
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(41)	(44)	(44)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement		(1)
Defined Benefit Plan Net Amortization	1	2	2
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	(4)	(6)	(2)
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)	$ (8)	$ (9)	$ (6)

Employee Benefit Plans - MEC _2

Employee Benefit Plans - MEC - Funded Status (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Defined Benefit Plan, Benefit Obligation, Increase (Decrease) for Plan Amendment	$ 0	$ 8
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	664	736
Defined Benefit Plan, Plan Assets, Contributions by Employer	2	8
Defined Benefit Plan, Contributions by Plan Participants (Deprecated 2017-01-31)	9	8
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss)	122	(38)
Defined Benefit Plan, Plan Assets, Payment for Settlement	0	0
Defined Benefit Plan, Benefits Paid (Deprecated 2017-01-31)	(55)	(50)
Ending balance	742	664	$ 736
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Beginning balance	672	721
Defined Benefit Plan, Service Cost	8	9	9
Defined Benefit Plan, Interest Cost	27	24	29
Defined Benefit Plan, Contributions by Plan Participants (Deprecated 2017-01-31)	9	8
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)	12	(40)
Defined Benefit Plan, Benefit Obligation, Increase (Decrease) for Plan Amendment	0	0
Defined Benefit Plan, Benefit Obligation, Payment for Settlement	0	0
Defined Benefit Plan, Benefits Paid (Deprecated 2017-01-31)	(55)	(50)
Ending balance	673	672	721
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Defined Benefit Plan, Funded (Unfunded) Status of Plan	69	(8)
Assets for Plan Benefits, Defined Benefit Plan	76	5
Other current liabilities	0	0
Liability, Defined Benefit Plan, Noncurrent	(7)	(13)
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position	69	(8)
Supplemental Employee Retirement Plan [Member]
Defined Benefit Plans, Supplemental Employee Retirement Plans [Abstract]
Life Insurance, Corporate or Bank Owned, Amount	252	256
MidAmerican Energy Company [Member]
Defined Benefit Plans, Supplemental Employee Retirement Plans [Abstract]
Life Insurance, Corporate or Bank Owned, Amount	203	191
MidAmerican Energy Company [Member] | Pension Plan [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	644
Ending balance	717	644
MidAmerican Energy Company [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	247	277
Defined Benefit Plan, Plan Assets, Contributions by Employer	1	1
Defined Benefit Plan, Contributions by Plan Participants (Deprecated 2017-01-31)	2	1
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss)	42	(17)
Defined Benefit Plan, Benefits Paid (Deprecated 2017-01-31)	(20)	(15)
Ending balance	272	247	277
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Beginning balance	242	246
Defined Benefit Plan, Service Cost	5	5	5
Defined Benefit Plan, Interest Cost	10	8	9
Defined Benefit Plan, Contributions by Plan Participants (Deprecated 2017-01-31)	2	1
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)	(13)	(3)
Defined Benefit Plan, Benefits Paid (Deprecated 2017-01-31)	(20)	(15)
Ending balance	226	242	246
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Defined Benefit Plan, Funded (Unfunded) Status of Plan	46	5
Assets for Plan Benefits, Defined Benefit Plan	46	5
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	46	5
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	122	116
UNITED STATES | Pension Plan [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	2,396	2,761
Defined Benefit Plan, Plan Assets, Contributions by Employer	12	38
Defined Benefit Plan, Contributions by Plan Participants (Deprecated 2017-01-31)	0	0
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss)	456	(147)
Defined Benefit Plan, Plan Assets, Payment for Settlement	(22)	(119)
Defined Benefit Plan, Benefits Paid (Deprecated 2017-01-31)	(186)	(137)
Ending balance	2,656	2,396	2,761
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Beginning balance	2,718	3,006
Defined Benefit Plan, Service Cost	16	21	24
Defined Benefit Plan, Interest Cost	111	105	116
Defined Benefit Plan, Contributions by Plan Participants (Deprecated 2017-01-31)	0	0
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)	242	(160)
Defined Benefit Plan, Benefit Obligation, Increase (Decrease) for Plan Amendment	(1)	2
Defined Benefit Plan, Benefit Obligation, Payment for Settlement	22	119
Defined Benefit Plan, Benefits Paid (Deprecated 2017-01-31)	(186)	(137)
Ending balance	2,878	2,718	3,006
Defined Benefit Plan, Accumulated Benefit Obligation	2,867	2,709
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Defined Benefit Plan, Funded (Unfunded) Status of Plan	(222)	(322)
Assets for Plan Benefits, Defined Benefit Plan	73	20
Other current liabilities	(13)	(13)
Liability, Defined Benefit Plan, Noncurrent	(282)	(329)
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position	(222)	(322)
UNITED STATES | MidAmerican Energy Company [Member] | Pension Plan [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	644	745
Defined Benefit Plan, Plan Assets, Contributions by Employer	7	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)	123	(39)
Defined Benefit Plan, Plan Assets, Payment for Settlement	0	(37)
Defined Benefit Plan, Benefits Paid (Deprecated 2017-01-31)	(57)	(32)
Ending balance	717	644	745
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Beginning balance	736	799
Defined Benefit Plan, Service Cost	6	9	9
Defined Benefit Plan, Interest Cost	30	28	31
Defined Benefit Plan, Contributions by Plan Participants (Deprecated 2017-01-31)	0	0
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)	48	(33)
Defined Benefit Plan, Benefit Obligation, Increase (Decrease) for Plan Amendment	0	2
Defined Benefit Plan, Benefit Obligation, Payment for Settlement	0	(37)
Defined Benefit Plan, Benefits Paid (Deprecated 2017-01-31)	(57)	(32)
Ending balance	763	736	$ 799
Defined Benefit Plan, Accumulated Benefit Obligation	758	733
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Defined Benefit Plan, Funded (Unfunded) Status of Plan	(46)	(92)
Assets for Plan Benefits, Defined Benefit Plan	66	17
Other current liabilities	(7)	(7)
Liability, Defined Benefit Plan, Noncurrent	(105)	(102)
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position	(46)	(92)
UNITED STATES | MidAmerican Energy Company [Member] | Supplemental Employee Retirement Plan [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Beginning balance	109
Ending balance	112	109
Defined Benefit Plan, Accumulated Benefit Obligation	$ 112	$ 109

Employee Benefit Plans - MEC _3

Employee Benefit Plans - MEC - Unrecognized Amounts (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Before Tax	$ 549	$ 480
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	(23)	50
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Net Prior Service Cost (Credit), Before Tax	(14)	(22)
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Before Tax	(31)	35	$ (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	72	38	(1)
Defined Benefit Plan, Net Amortization Recognized in Net Periodic Benefit Cost Before Tax	6	(13)
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Arising During Period, Before Tax	(66)	51
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	4	44	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	(45)	23
Defined Benefit Plan, Net Amortization Recognized in Net Periodic Benefit Cost Before Tax	5	(11)
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Arising During Period, Before Tax	(40)	34
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	(32)	(10)	(26)
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	23	14
Defined Benefit Plan, Net Amortization Recognized in Net Periodic Benefit Cost Before Tax	(1)	(2)
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Arising During Period, Before Tax	(22)	16
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	4	48
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Net Prior Service Cost (Credit), Before Tax	(14)	(20)
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Before Tax	(10)	28	(2)
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	(42)	26
Defined Benefit Plan, Net Amortization Recognized in Net Periodic Benefit Cost Before Tax	4	4
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] | 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	7	37	14
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	(33)	20
Defined Benefit Plan, Net Amortization Recognized in Net Periodic Benefit Cost Before Tax	3	3
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Arising During Period, Before Tax	(30)	23
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	(17)	(9)	(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	(9)	6
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)	7
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	653	747
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Net Prior Service Cost (Credit), Before Tax	(2)	0
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Before Tax	652	746	642
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	61	(151)
Defined Benefit Plan, Net Amortization Recognized in Net Periodic Benefit Cost Before Tax	31	28
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Arising During Period, Before Tax	(94)	104
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	661	730	665
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	(38)	114
Defined Benefit Plan, Net Amortization Recognized in Net Periodic Benefit Cost Before Tax	(31)	28
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Arising During Period, Before Tax	(69)	65
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	(33)	0	(43)
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	33	43
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	(33)	43
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	6	40
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Net Prior Service Cost (Credit), Before Tax	(1)	1
Defined Benefit Plan, Net Periodic Benefit Cost Not Yet Recognized, Before Tax	5	41	(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	(35)	52
Defined Benefit Plan, Net Amortization Recognized in Net Periodic Benefit Cost Before Tax	(1)	(2)
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	(36)	51
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	19	25	24
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)	2
Defined Benefit Plan, Net Amortization Recognized in Net Periodic Benefit Cost Before Tax	(1)	(2)
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	(6)	1
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	(32)	0	(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	(32)	41
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	(32)	41
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	18	16	$ 7
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	2	9
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	$ 2	$ 9

Employee Benefit Plans - MEC _4

Employee Benefit Plans - MEC - Plan Assumptions (Details)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Health Care Cost Trend Rate Assumed, Next Fiscal Year	6.50%	6.80%
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
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	3.24%	4.21%	3.57%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	4.21%	3.57%	4.01%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets	6.39%	6.44%	6.73%
MidAmerican Energy Company [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Health Care Cost Trend Rate Assumed, Next Fiscal Year	6.50%	6.80%
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	3.20%	4.15%	3.50%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	4.15%	3.50%	3.90%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets	6.25%	6.25%	6.50%
UNITED STATES | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	3.32%	4.25%	3.60%
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	3.22%	3.38%	2.49%
Interest Crediting Rates for Cash Balance Plan, Second Year	2.94%	3.54%	3.06%
Interest Crediting Rates for Cash Balance Plan, Sixth Year			2.72%
Interest Crediting Rates for Cash Balance Plan, Fifth Year		3.56%	2.72%
Interest Crediting Rates for Cash Balance Plan, Fourth Year	3.02%	3.56%	2.72%
Interest Crediting Rates for Cash Balance Plan, Third Year	2.94%	3.54%	3.06%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	4.25%	3.60%	4.06%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets	6.48%	6.36%	6.55%
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	3.40%	4.25%	3.60%
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	3.40%	2.26%	1.44%
Interest Crediting Rates for Cash Balance Plan, Second Year	2.27%	3.40%	2.26%
Interest crediting rates for cash balance plan	3.40%	2.26%	1.44%
Interest Crediting Rates for Cash Balance Plan, Sixth Year			1.60%
Interest Crediting Rates for Cash Balance Plan, Fifth Year		3.40%	1.60%
Interest Crediting Rates for Cash Balance Plan, Fourth Year	2.27%	3.40%	1.60%
Interest Crediting Rates for Cash Balance Plan, Third Year	2.27%	3.40%	2.26%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	4.25%	3.60%	4.10%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets	6.50%	6.50%	6.75%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase	2.75%	2.75%	2.75%
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%	4.13%	4.81%

Employee Benefit Plans - MEC _5

Employee Benefit Plans - MEC - Contributions and Benefit Payments (Details) $ in Millions	Dec. 31, 2019USD ($)
Pension Plan [Member] | MidAmerican Energy Company [Member]
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	63
Defined Benefit Plan, Expected Future Benefit Payment, Year Three	61
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	244
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Expected Future Benefit Payment, Next Twelve Months	57
Defined Benefit Plan, Expected Future Benefit Payment, Year Two	56
Defined Benefit Plan, Expected Future Benefit Payment, Year Three	55
Defined Benefit Plan, Expected Future Benefit Payment, Year Four	54
Defined Benefit Plan, Expected Future Benefit Payment, Year Five	51
Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter	224
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	1
Defined Benefit Plan, Expected Future Benefit Payment, Next Twelve Months	20
Defined Benefit Plan, Expected Future Benefit Payment, Year Two	22
Defined Benefit Plan, Expected Future Benefit Payment, Year Three	22
Defined Benefit Plan, Expected Future Benefit Payment, Year Four	21
Defined Benefit Plan, Expected Future Benefit Payment, Year Five	20
Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter	$ 84

Employee Benefit Plans - MEC _6

Employee Benefit Plans - MEC - Asset Allocations (Details) - MidAmerican Energy Company [Member]	12 Months Ended
	Dec. 31, 2019
Minimum [Member] | Pension Plan [Member] | Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description	0.2	[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	0.6	[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	0.02
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] | Other Postretirement Benefits Plan [Member] | Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description	0.25	[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	0.45	[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	0
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	0.5	[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	.8	[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	.08
Maximum [Member] | Pension Plan [Member] | Other Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description	0.03
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	0.45	[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	0.8	[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	0
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	0.05
[1]	(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, 2019	Dec. 31, 2018		Dec. 31, 2017
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		$ 742	$ 664		$ 736
Other Postretirement Benefits Plan [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		433	389
Other Postretirement Benefits Plan [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		135	120
Other Postretirement Benefits Plan [Member] | Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		18	12
Other Postretirement Benefits Plan [Member] | Cash Equivalents [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		17	10	[1]
Other Postretirement Benefits Plan [Member] | Cash Equivalents [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		1	2	[1]
Other Postretirement Benefits Plan [Member] | US Treasury Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		23	13
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		23	13
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]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		44	42
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		44	42
Other Postretirement Benefits Plan [Member] | Municipal Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		57	45
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		57	45
Other Postretirement Benefits Plan [Member] | US Government-sponsored Enterprises Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		33	30
Other Postretirement Benefits 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	0
Other Postretirement Benefits 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		33	30
Other Postretirement Benefits Plan [Member] | Domestic Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		151	158
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		151	158	[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]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		6	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		6	6	[1]
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	0
Other Postretirement Benefits Plan [Member] | Equity Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		$ 236	$ 203
Percentage of Investment Funds Comprised Of Equity Securitites		58.00%	65.00%
Percentage of Investment Funds Comprised Of Debt Securities		42.00%	35.00%
Percentage Of Investment Funds Invested in United States Securities		75.00%	79.00%
Percentage Of Investment Funds Invested In International Securities		25.00%	21.00%
Other Postretirement Benefits Plan [Member] | Equity Funds [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		$ 236	$ 202
Other Postretirement Benefits Plan [Member] | Equity Funds [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	1
Other Postretirement Benefits Plan [Member] | Plan Asset Categories Excluding Investments Measured with a NAV excluding the Practical Expedient [Domain]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		568	509
Other Postretirement Benefits Plan [Member] | Accounting Standards Update 2015-07 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		742	664
Other Postretirement Benefits Plan [Member] | Accounting Standards Update 2015-07 [Member] | Equity Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		169	149	[2]
Other Postretirement Benefits Plan [Member] | MidAmerican Energy Company [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		272	247		$ 277
Other Postretirement Benefits Plan [Member] | MidAmerican Energy Company [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		195	180
Other Postretirement Benefits Plan [Member] | MidAmerican Energy Company [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		77	67
Other Postretirement Benefits Plan [Member] | MidAmerican Energy Company [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] | Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		6	5
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		6	5
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]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		6	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		6	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]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		12	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		12	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]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		55	43
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		55	43
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]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		10	12
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		10	12
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]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		75	73
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	73
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	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	0
Other Postretirement Benefits Plan [Member] | MidAmerican Energy Company [Member] | Equity Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	[3]	$ 108	$ 96
Percentage of Investment Funds Comprised Of Equity Securitites		77.00%	78.00%
Percentage of Investment Funds Comprised Of Debt Securities		23.00%	22.00%
Percentage Of Investment Funds Invested in United States Securities		42.00%	41.00%
Percentage Of Investment Funds Invested In International Securities		58.00%	59.00%
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]	$ 108	$ 96
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
Pension Plan [Member] | MidAmerican Energy Company [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		717	644
Pension Plan [Member] | MidAmerican Energy Company [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		277	217
Pension Plan [Member] | MidAmerican Energy Company [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		99	126
Pension Plan [Member] | MidAmerican Energy Company [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Pension Plan [Member] | MidAmerican Energy Company [Member] | Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		21	20
Pension 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		21	0
Pension 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	20
Pension 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
Pension Plan [Member] | MidAmerican Energy Company [Member] | US Treasury Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		16	6
Pension 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		16	6
Pension 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
Pension 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
Pension Plan [Member] | MidAmerican Energy Company [Member] | Corporate Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		61	63
Pension 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
Pension 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		61	63
Pension 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
Pension Plan [Member] | MidAmerican Energy Company [Member] | Municipal Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		5	6
Pension 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
Pension 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		5	6
Pension 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
Pension Plan [Member] | MidAmerican Energy Company [Member] | US Government-sponsored Enterprises Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		33	37
Pension 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
Pension 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		33	37
Pension 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
Pension Plan [Member] | MidAmerican Energy Company [Member] | Domestic Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		129	111
Pension 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		129	111
Pension 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	0
Pension 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	0
Pension Plan [Member] | MidAmerican Energy Company [Member] | Foreign Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		42	35
Pension Plan [Member] | MidAmerican Energy Company [Member] | Foreign Equity Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		42	35
Pension Plan [Member] | MidAmerican Energy Company [Member] | Foreign Equity Securities [Member] | Fair Value, Inputs, Level 2 [Member]
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 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Pension Plan [Member] | MidAmerican Energy Company [Member] | Equity Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	[4]	$ 69	$ 65
Percentage of Investment Funds Comprised Of Equity Securitites		69.00%	65.00%
Percentage of Investment Funds Comprised Of Debt Securities		31.00%	35.00%
Percentage Of Investment Funds Invested in United States Securities		74.00%	74.00%
Percentage Of Investment Funds Invested In International Securities		26.00%	26.00%
Pension 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	[4]	$ 69	$ 65
Pension 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		0	0
Pension 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		0	0
Pension Plan [Member] | MidAmerican Energy Company [Member] | Plan Asset Categories Excluding Investments Measured with a NAV excluding the Practical Expedient [Domain]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		376	343
Pension Plan [Member] | MidAmerican Energy Company [Member] | Accounting Standards Update 2015-07 [Member] | Equity Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		299	260	[4]
Pension Plan [Member] | MidAmerican Energy Company [Member] | Accounting Standards Update 2015-07 [Member] | Real Estate Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		$ 42	$ 41
[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 58% and 42%, respectively, for 2019 and 65% and 35%, respectively, for 2018. Additionally, these funds are invested in United States and international securities of approximately 75% and 25%, respectively, for 2019 and 79% and 21%, respectively, for 2018.
[3]	(2)Investment funds are comprised of mutual funds and collective trust funds. These funds consist of equity and debt securities of approximately 77% and 23%, respectively, for 2019 and 78% and 22%, respectively, for 2018. Additionally, these funds are invested in United States and international securities of approximately 42% and 58%, respectively, for 2019 and 41% and 59%, respectively, for 2018.
[4]	(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 2019 and 65% and 35%, respectively, for 2018. Additionally, these funds are invested in United States and international securities of approximately 74% and 26%, respectively, for 2019 and 74% and 26%, respectively, for 2018.

Employee Benefit Plans - MEC _8

Employee Benefit Plans - MEC - Defined Contribution Plans (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
MidAmerican Energy Company [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Contribution Plan, Cost	$ 23	$ 22	$ 20

Employee Benefit Plans - MidAme

Employee Benefit Plans - MidAmerican Funding - Net Periodic Benefit Cost (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Pension Plan [Member] | MidAmerican Funding, LLC and Subsidiaries [Domain]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	$ 4	$ 3	$ 4
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	(11)	(21)	(16)
Other Postretirement Benefits Plan [Member] | MidAmerican Funding, LLC and Subsidiaries [Domain]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	$ (2)	$ (2)	$ (3)

Retirement Plan and Postretir_3

Retirement Plan and Postretirement Benefits - NPC (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
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	$ 2	$ 8
Liability, Defined Benefit Plan, Noncurrent	7	13
Liability, Defined Benefit Plan, Current	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	12	38
Liability, Defined Benefit Plan, Noncurrent	282	329
Liability, Defined Benefit Plan, Current	13	13
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 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	2	1
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	19	1
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	18	26
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 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
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]
Liability, Defined Benefit Plan, Current	$ 1	$ 1

Retirement Plan and Postretir_4

Retirement Plan and Postretirement Benefits - SPPC (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
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	$ 2	$ 8
Liability, Defined Benefit Plan, Noncurrent	7	13
Liability, Defined Benefit Plan, Current	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	12	38
Liability, Defined Benefit Plan, Noncurrent	282	329
Liability, Defined Benefit Plan, Current	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	6	$ 4
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	7	13
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	6	1
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	4	19
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	7
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]
Liability, Defined Benefit Plan, Current	$ 1	$ 1

Asset Retirement Obligations -

Asset Retirement Obligations - Asset Retirement Obligation By Type (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Asset Retirement Obligations By Type [Line Items]
Asset Retirement Obligation, Revision of Estimate		$ 257	$ 10
Asset Retirement Obligation		1,272	985	$ 954
Regulatory Liabilities		7,311	7,506
Fossil Fuel Plant [Member]
Asset Retirement Obligations By Type [Line Items]
Asset Retirement Obligation		623	371
Quad Cities Station [Member]
Asset Retirement Obligations By Type [Line Items]
Asset Retirement Obligation		358	345
Wind Generating Facility [Member]
Asset Retirement Obligations By Type [Line Items]
Asset Retirement Obligation		211	174
Offshore pipeline facilities [Member]
Asset Retirement Obligations By Type [Line Items]
Asset Retirement Obligation		15	33
Solar Generating Facility [Member]
Asset Retirement Obligations By Type [Line Items]
Asset Retirement Obligation		21	20
Other Plant in Service [Member]
Asset Retirement Obligations By Type [Line Items]
Asset Retirement Obligation		44	42
Cost of removal
Asset Retirement Obligations By Type [Line Items]
Regulatory Liabilities	[1]	2,370	2,426
Quad Cities Station nuclear decommissioning trust funds [Member]
Asset Retirement Obligations By Type [Line Items]
Nuclear decommissioning trust funds		599	504
MidAmerican Energy Company and Subsidiaries [Member]
Asset Retirement Obligations By Type [Line Items]
Asset Retirement Obligation, Revision of Estimate		234	(10)
Asset Retirement Obligation		839	562	$ 559
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		325	93
MidAmerican Energy Company and Subsidiaries [Member] | Quad Cities Station [Member]
Asset Retirement Obligations By Type [Line Items]
Asset Retirement Obligation		358	345
MidAmerican Energy Company and Subsidiaries [Member] | Wind Generating Facility [Member]
Asset Retirement Obligations By Type [Line Items]
Asset Retirement Obligation		154	123
MidAmerican Energy Company and Subsidiaries [Member] | Other Plant in Service [Member]
Asset Retirement Obligations By Type [Line Items]
Asset Retirement Obligation		2	1
MidAmerican Energy Company and Subsidiaries [Member] | Cost of removal
Asset Retirement Obligations By Type [Line Items]
Regulatory Liabilities		572	708
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		$ 599	$ 504
[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, 2019	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Beginning Balance	$ 985	$ 954
Asset Retirement Obligation, Revision of Estimate	257	10
Asset Retirement Obligation, Liabilities Incurred	43	28
Retirements	(61)	(45)
Asset Retirement Obligation, Accretion Expense	48	38
Asset Retirement Obligation	1,272	985	$ 1,272	$ 985
Asset Retirement Obligation, Current			167	43
Asset Retirement Obligations, Noncurrent			$ 1,105	$ 942
Ending Balance	$ 1,272	$ 985

Asset Retirement Obligations _3

Asset Retirement Obligations - PacifiCorp - Asset Retirement Obligations By Type (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Asset Retirement Obligations By Type [Line Items]
Regulatory liabilities	$ 7,100	$ 7,346
PacifiCorp [Member]
Asset Retirement Obligations By Type [Line Items]
Regulatory liabilities	2,913	2,978
PacifiCorp [Member] | Cost of removal
Asset Retirement Obligations By Type [Line Items]
Regulatory liabilities	$ 1,019	$ 994

Asset Retirement Obligations _4

Asset Retirement Obligations - PacifiCorp - Change in Asset Retirement Obligations (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Beginning Balance	$ 985	$ 954
Asset Retirement Obligation, Revision of Estimate	257	10
Asset Retirement Obligation, Liabilities Incurred	43	28
Retirements	(61)	(45)
Asset Retirement Obligation, Accretion Expense	48	38
Asset Retirement Obligation, Current	167	43
Asset Retirement Obligations, Noncurrent	1,105	942
Ending Balance	1,272	985
PacifiCorp [Member]
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Beginning Balance	227	215
Asset Retirement Obligation, Revision of Estimate	27	9
Asset Retirement Obligation, Liabilities Incurred	9	0
Retirements	(15)	(5)
Asset Retirement Obligation, Accretion Expense	9	8
Asset Retirement Obligation, Current	19	21
Asset Retirement Obligations, Noncurrent	238	206
Ending Balance	$ 257	$ 227

Asset Retirement Obligations _5

Asset Retirement Obligations - MEC - Asset Retirement Obligations By Type (Details) - USD ($) $ in Millions		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Asset Retirement Obligations By Type [Line Items]
Asset Retirement Obligation		$ 1,272	$ 985	$ 954
Regulatory Liabilities		7,311	7,506
Quad Cities Unit Nos 1 and 2 [Member]
Asset Retirement Obligations By Type [Line Items]
Asset Retirement Obligation		358	345
Fossil Fuel Plant [Member]
Asset Retirement Obligations By Type [Line Items]
Asset Retirement Obligation		623	371
Wind Generating Facility [Member]
Asset Retirement Obligations By Type [Line Items]
Asset Retirement Obligation		211	174
Other Plant in Service [Member]
Asset Retirement Obligations By Type [Line Items]
Asset Retirement Obligation		44	42
MidAmerican Energy Company [Member]
Asset Retirement Obligations By Type [Line Items]
Asset Retirement Obligation		839	562	$ 559
MidAmerican Energy Company [Member] | Quad Cities Unit Nos 1 and 2 [Member]
Asset Retirement Obligations By Type [Line Items]
Asset Retirement Obligation		358	345
MidAmerican Energy Company [Member] | Fossil Fuel Plant [Member]
Asset Retirement Obligations By Type [Line Items]
Asset Retirement Obligation		325	93
MidAmerican Energy Company [Member] | Wind Generating Facility [Member]
Asset Retirement Obligations By Type [Line Items]
Asset Retirement Obligation		154	123
MidAmerican Energy Company [Member] | Other Plant in Service [Member]
Asset Retirement Obligations By Type [Line Items]
Asset Retirement Obligation		2	1
Quad Cities Unit Nos 1 and 2 [Member] | MidAmerican Energy Company [Member]
Asset Retirement Obligations By Type [Line Items]
Decommissioning Fund Investments, Fair Value		599	504
Cost of removal
Asset Retirement Obligations By Type [Line Items]
Regulatory Liabilities	[1]	2,370	2,426
Cost of removal | MidAmerican Energy Company [Member]
Asset Retirement Obligations By Type [Line Items]
Regulatory Liabilities		$ 572	$ 708
[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 _6

Asset Retirement Obligations - MEC - Change in Asset Retirement Obligations (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Beginning Balance	$ 985	$ 954
Asset Retirement Obligation, Revision of Estimate	257	10
Asset Retirement Obligation, Liabilities Incurred	43	28
Asset Retirement Obligation, Liabilities Settled	(61)	(45)
Asset Retirement Obligation, Accretion Expense	48	38
Asset Retirement Obligation, Current	167	43
Asset Retirement Obligations, Noncurrent	1,105	942
Ending Balance	1,272	985
MidAmerican Energy Company [Member]
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Beginning Balance	562	559
Asset Retirement Obligation, Revision of Estimate	234	(10)
Asset Retirement Obligation, Liabilities Incurred	27	17
Asset Retirement Obligation, Liabilities Settled	(14)	(28)
Asset Retirement Obligation, Accretion Expense	30	24
Asset Retirement Obligation, Current	135	10
Asset Retirement Obligations, Noncurrent	704	552
Ending Balance	839	562
Fossil Fuel Plant [Member]
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Beginning Balance	371
Ending Balance	623	371
Fossil Fuel Plant [Member] | MidAmerican Energy Company [Member]
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Beginning Balance	93
Asset Retirement Obligation, Revision of Estimate	237
Ending Balance	$ 325	$ 93

Asset Retirement Obligations _7

Asset Retirement Obligations - NPC - Asset Retirement Obligation by Type (Details) - USD ($) $ in Millions		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Asset Retirement Obligations By Type [Line Items]
Regulatory Liabilities		$ 7,311	$ 7,506
Asset Retirement Obligation		1,272	985	$ 954
Other Plant in Service [Member]
Asset Retirement Obligations By Type [Line Items]
Asset Retirement Obligation		44	42
Cost of removal
Asset Retirement Obligations By Type [Line Items]
Regulatory Liabilities	[1]	2,370	2,426
Nevada Power Company [Member]
Asset Retirement Obligations By Type [Line Items]
Regulatory Liabilities		1,256	1,186
Asset Retirement Obligation		74	83	$ 80
Nevada Power Company [Member] | Waste water remediation [Member]
Asset Retirement Obligations By Type [Line Items]
Asset Retirement Obligation		37	37
Nevada Power Company [Member] | Evaporative Ponds and Dry Ash Landfills [Member]
Asset Retirement Obligations By Type [Line Items]
Asset Retirement Obligation		12	12
Nevada Power Company [Member] | Asbestos [Member]
Asset Retirement Obligations By Type [Line Items]
Asset Retirement Obligation		0	5
Nevada Power Company [Member] | Solar [Member]
Asset Retirement Obligations By Type [Line Items]
Asset Retirement Obligation		2	2
Nevada Power Company [Member] | Other Plant in Service [Member]
Asset Retirement Obligations By Type [Line Items]
Asset Retirement Obligation		23	27
Nevada Power Company [Member] | Cost of removal
Asset Retirement Obligations By Type [Line Items]
Regulatory Liabilities	[2]	$ 332	$ 320
[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 As

Asset Retirement Obligations Asset Retirement Obligations - NPC - Change in Asset Retirement Obligations (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Beginning Balance	$ 985	$ 954
Asset Retirement Obligation, Revision of Estimate	257	10
Retirements	(61)	(45)
Asset Retirement Obligation, Accretion Expense	48	38
Ending Balance	1,272	985
Asset Retirement Obligation, Current	167	43
Asset Retirement Obligations, Noncurrent	1,105	942
Nevada Power Company [Member]
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Beginning Balance	83	80
Asset Retirement Obligation, Revision of Estimate	6	11
Retirements	(19)	(11)
Asset Retirement Obligation, Accretion Expense	4	3
Ending Balance	74	83
Asset Retirement Obligation, Current	14	13
Asset Retirement Obligations, Noncurrent	$ 60	$ 70

Asset Retirement Obligations _8

Asset Retirement Obligations - SPPC - Asset Retirement Obligation by Type (Details) - USD ($) $ in Millions		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Asset Retirement Obligations By Type [Line Items]
Regulatory Liabilities		$ 7,311	$ 7,506
Asset Retirement Obligation		1,272	985	$ 954
Other Plant in Service [Member]
Asset Retirement Obligations By Type [Line Items]
Asset Retirement Obligation		44	42
Cost of removal
Asset Retirement Obligations By Type [Line Items]
Regulatory Liabilities	[1]	2,370	2,426
Sierra Pacific Power Company [Member]
Asset Retirement Obligations By Type [Line Items]
Regulatory Liabilities		538	509
Asset Retirement Obligation		10	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		2	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]	$ 217	$ 210
[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 _9

Asset Retirement Obligations - SPPC - Change in Asset Retirement Obligations (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Beginning Balance	$ 985	$ 954
Asset Retirement Obligation, Accretion Expense	48	38
Ending Balance	1,272	985
Asset Retirement Obligations, Noncurrent	1,105	942
Sierra Pacific Power Company [Member]
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Beginning Balance	10	10
Asset Retirement Obligation, Accretion Expense	0	0
Ending Balance	10	10
Asset Retirement Obligations, Noncurrent	$ 10	$ 10

Commitments and Contingencies -

Commitments and Contingencies - Legal (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Loss Contingencies [Line Items]
Property, plant and equipment, net	$ 73,305	$ 68,087	$ 65,357
Equity method investments	3,947	2,440
PacifiCorp [Member]
Loss Contingencies [Line Items]
Property, plant and equipment, net	$ 20,973	$ 19,570	$ 19,183
Topaz [Member] | Counterparty Bankruptcy [Member]
Loss Contingencies [Line Items]
Property, Plant and Equipment Disclosure [Text Block]	1
Property, plant and equipment, net	$ 1,000
Non-Recourse Debt	$ 900
Property, Plant and Equipment [Abstract]
Revenue from Contract with Customer [Abstract]	1
Agua Caliente [Member] | Counterparty Bankruptcy [Member]
Loss Contingencies [Line Items]
Equity method investment, ownership percentage	49.00%
Non-Recourse Debt	$ 800
Equity method investments	$ 73
Property, Plant and Equipment [Abstract]
Revenue from Contract with Customer [Abstract]	1

Commitments and Contingencies_3

Commitments and Contingencies - Commitments Table (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Contractual Obligation [Line Items]
Purchase Obligation, Due in Next Twelve Months	$ 2,400
Contractual Obligation, Due in Next Twelve Months	4,631
Contractual Obligation, Due in Second Year	2,458
Contractual Obligation, Due in Third Year	1,614
Contractual Obligation, Due in Fourth Year	1,467
Contractual Obligation, Due in Fifth Year	1,421
Contractual Obligation, Due after Fifth Year	17,467
Contractual Obligation	29,058
Operating Leases, Rent Expense		$ 156
MidAmerican Funding [Member]
Contractual Obligation [Line Items]
Coal transportation costs, railroad	123	$ 111	$ 109
Fuel, capacity and transmission contract commitments [Member]
Contractual Obligation [Line Items]
Purchase Obligation, Due in Next Twelve Months	2,218
Purchase Obligation, Due in Second Year	1,527
Purchase Obligation, Due in Third Year	1,193
Purchase Obligation, Due in Fourth Year	1,093
Purchase Obligation, Due in Fifth Year	1,088
Purchase Obligation, Due after Fifth Year	13,584
Purchase Obligation	20,703
Capital Addition Purchase Commitments [Member]
Contractual Obligation [Line Items]
Purchase Obligation, Due in Next Twelve Months	1,682
Purchase Obligation, Due in Second Year	521
Purchase Obligation, Due in Third Year	27
Purchase Obligation, Due in Fourth Year	2
Purchase Obligation, Due in Fifth Year	8
Purchase Obligation, Due after Fifth Year	0
Purchase Obligation	2,240
Easements [Member]
Contractual Obligation [Line Items]
Purchase Obligation, Due in Next Twelve Months	62
Purchase Obligation, Due in Second Year	68
Purchase Obligation, Due in Third Year	70
Purchase Obligation, Due in Fourth Year	72
Purchase Obligation, Due in Fifth Year	70
Purchase Obligation, Due after Fifth Year	2,259
Purchase Obligation	2,601
Maintenance, service and other contracts [Member]
Contractual Obligation [Line Items]
Purchase Obligation, Due in Next Twelve Months	669
Purchase Obligation, Due in Second Year	342
Purchase Obligation, Due in Third Year	324
Purchase Obligation, Due in Fourth Year	300
Purchase Obligation, Due in Fifth Year	255
Purchase Obligation, Due after Fifth Year	1,624
Purchase Obligation	3,514
MidAmerican Energy Company and Subsidiaries [Member]
Contractual Obligation [Line Items]
Contractual Obligation, Due in Next Twelve Months	1,144
Contractual Obligation, Due in Second Year	844
Contractual Obligation, Due in Third Year	327
Contractual Obligation, Due in Fourth Year	266
Contractual Obligation, Due in Fifth Year	178
Contractual Obligation, Due after Fifth Year	1,976
Contractual Obligation	4,735
MidAmerican Energy Company and Subsidiaries [Member] | Capital Addition Purchase Commitments [Member]
Contractual Obligation [Line Items]
Purchase Obligation, Due in Next Twelve Months	670
Purchase Obligation, Due in Second Year	515
Purchase Obligation, Due in Third Year	27
Purchase Obligation, Due in Fourth Year	2
Purchase Obligation, Due in Fifth Year	4
Purchase Obligation, Due after Fifth Year	0
Purchase Obligation	1,218
MidAmerican Energy Company and Subsidiaries [Member] | Easements [Member]
Contractual Obligation [Line Items]
Purchase Obligation, Due in Next Twelve Months	32
Purchase Obligation, Due in Second Year	36
Purchase Obligation, Due in Third Year	37
Purchase Obligation, Due in Fourth Year	38
Purchase Obligation, Due in Fifth Year	39
Purchase Obligation, Due after Fifth Year	1,492
Purchase Obligation	1,674
MidAmerican Energy Company and Subsidiaries [Member] | Maintenance, service and other contracts [Member]
Contractual Obligation [Line Items]
Purchase Obligation, Due in Next Twelve Months	198
Purchase Obligation, Due in Second Year	156
Purchase Obligation, Due in Third Year	154
Purchase Obligation, Due in Fourth Year	155
Purchase Obligation, Due in Fifth Year	120
Purchase Obligation, Due after Fifth Year	432
Purchase Obligation	$ 1,215

Commitments and Contingencies _

Commitments and Contingencies – Hydroelectric (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Hydroelectric [Line Items]
Operating Leases, Rent Expense		$ 156,000,000
PacifiCorp [Member]
Hydroelectric [Line Items]
Capital expenditures required by hydroelectric licenses	$ 168,000,000
PacifiCorp [Member] | Klamath Hydroelectric System [Member]
Hydroelectric [Line Items]
Dam removal cost limit	200,000,000
PacifiCorp [Member] | Klamath Hydroelectric System [Member] | CALIFORNIA
Hydroelectric [Line Items]
Dam removal cost limit	16,000,000
Additional dam removal costs, California bond measure	250,000,000
PacifiCorp [Member] | Klamath Hydroelectric System [Member] | VARIOUS [Domain]
Hydroelectric [Line Items]
Klamath Relicensing and Settlement Costs	29,000,000
PacifiCorp [Member]
Hydroelectric [Line Items]
Capital expenditures required by hydroelectric licenses	168,000,000
PacifiCorp [Member] | Klamath Hydroelectric System [Member]
Hydroelectric [Line Items]
Public Utilities Property Plant & Equipment, Number of Generating Facilities	4
PacifiCorp [Member] | Klamath Hydroelectric System [Member] | CALIFORNIA
Hydroelectric [Line Items]
Dam removal cost limit	$ 16,000,000

Commitments and Contingencies_4

Commitments and Contingencies - PacifiCorp - Hydroelectric (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Hydroelectric [Line Items]
Assets	$ 100,051	$ 92,189	$ 90,208
PacifiCorp [Member]
Hydroelectric [Line Items]
Assets	23,697	$ 22,313	$ 21,920	$ 22,394	$ 22,637
Capital expenditures required by hydroelectric licenses	168
PacifiCorp [Member] | Klamath Hydroelectric System [Member]
Hydroelectric [Line Items]
Dam removal cost limit	200
PacifiCorp [Member] | Klamath Hydroelectric System [Member] | CALIFORNIA
Hydroelectric [Line Items]
Dam removal cost limit	16
Additional dam removal costs, California bond measure	250
PacifiCorp [Member] | Klamath Hydroelectric System [Member] | VARIOUS [Domain]
Hydroelectric [Line Items]
Klamath Relicensing and Settlement Costs	$ 29

Commitments and Contingencies_5

Commitments and Contingencies - PacifiCorp - Commitments Tables (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018
Contractual Obligation [Line Items]
Purchase Obligation, Due in Next Twelve Months		$ 2,400
Operating Leases, Future Minimum Payments Due, Next Twelve Months	[1]		$ 147
Operating Leases, Future Minimum Payments, Due in Two Years	[1]		128
Operating Leases, Future Minimum Payments, Due in Three Years	[1]		110
Operating Leases, Future Minimum Payments, Due in Four Years	[1]		87
Operating Leases, Future Minimum Payments, Due in Five Years	[1]		61
Operating Leases, Future Minimum Payments, Due Thereafter	[1]		159
Operating Leases, Future Minimum Payments Due	[1]		692
Contractual Obligation, Due in Next Twelve Months		4,631
Contractual Obligation, Due in Second Year		2,458
Contractual Obligation, Due in Third Year		1,614
Contractual Obligation, Due in Fourth Year		1,467
Contractual Obligation, Due in Fifth Year		1,421
Contractual Obligation, Due after Fifth Year		17,467
Contractual Obligation		29,058
Capital Addition Purchase Commitments [Member]
Contractual Obligation [Line Items]
Purchase Obligation, Due in Next Twelve Months		1,682
Purchase Obligation, Due in Second Year		521
Purchase Obligation, Due in Third Year		27
Purchase Obligation, Due in Fourth Year		2
Purchase Obligation, Due in Fifth Year		8
Purchase Obligation, Due after Fifth Year		0
Purchase Obligation		2,240
Easements [Member]
Contractual Obligation [Line Items]
Purchase Obligation, Due in Next Twelve Months		62
Purchase Obligation, Due in Second Year		68
Purchase Obligation, Due in Third Year		70
Purchase Obligation, Due in Fourth Year		72
Purchase Obligation, Due in Fifth Year		70
Purchase Obligation, Due after Fifth Year		2,259
Purchase Obligation		2,601
Maintenance, service and other contracts [Member]
Contractual Obligation [Line Items]
Purchase Obligation, Due in Next Twelve Months		669
Purchase Obligation, Due in Second Year		342
Purchase Obligation, Due in Third Year		324
Purchase Obligation, Due in Fourth Year		300
Purchase Obligation, Due in Fifth Year		255
Purchase Obligation, Due after Fifth Year		1,624
Purchase Obligation		3,514
PacifiCorp [Member]
Contractual Obligation [Line Items]
Operating Leases, Future Minimum Payments Due, Next Twelve Months	[2]		3
Operating Leases, Future Minimum Payments, Due in Two Years	[2]		3
Operating Leases, Future Minimum Payments, Due in Three Years	[2]		3
Operating Leases, Future Minimum Payments, Due in Four Years	[2]		2
Operating Leases, Future Minimum Payments, Due in Five Years	[2]		2
Operating Leases, Future Minimum Payments, Due Thereafter	[2]		7
Operating Leases, Future Minimum Payments Due	[2]		20
Contractual Obligation, Due in Next Twelve Months		2,402
Contractual Obligation, Due in Second Year		901
Contractual Obligation, Due in Third Year		672
Contractual Obligation, Due in Fourth Year		583
Contractual Obligation, Due in Fifth Year		568
Contractual Obligation, Due after Fifth Year		4,554
Contractual Obligation		$ 9,680
Rent expense for power purchase agreements meeting definition of operating lease			$ 14
Maximum percentage of energy sources for which a share of operating costs and debt service is required		5.00%	5.00%
Operating leases, rent expense, net
PacifiCorp [Member] | Purchased electricity contracts - commercially operable
Contractual Obligation [Line Items]
Purchase Obligation, Due in Next Twelve Months		$ 279
Purchase Obligation, Due in Second Year		177
Purchase Obligation, Due in Third Year		174
Purchase Obligation, Due in Fourth Year		168
Purchase Obligation, Due in Fifth Year		164
Purchase Obligation, Due after Fifth Year		1,810
Purchase Obligation		2,772
PacifiCorp [Member] | Purchased electricity contracts - not commercially operable
Contractual Obligation [Line Items]
Purchase Obligation, Due in Next Twelve Months		7
Purchase Obligation, Due in Second Year		52
Purchase Obligation, Due in Third Year		52
Purchase Obligation, Due in Fourth Year		53
Purchase Obligation, Due in Fifth Year		53
Purchase Obligation, Due after Fifth Year		987
Purchase Obligation		1,204
PacifiCorp [Member] | Fuel contracts
Contractual Obligation [Line Items]
Purchase Obligation, Due in Next Twelve Months		832
Purchase Obligation, Due in Second Year		519
Purchase Obligation, Due in Third Year		316
Purchase Obligation, Due in Fourth Year		245
Purchase Obligation, Due in Fifth Year		248
Purchase Obligation, Due after Fifth Year		775
Purchase Obligation		2,935
PacifiCorp [Member] | Capital Addition Purchase Commitments [Member]
Contractual Obligation [Line Items]
Purchase Obligation, Due in Next Twelve Months		844
Purchase Obligation, Due in Second Year		6
Purchase Obligation, Due in Third Year		0
Purchase Obligation, Due in Fourth Year		0
Purchase Obligation, Due in Fifth Year		4
Purchase Obligation, Due after Fifth Year		0
Purchase Obligation		854
PacifiCorp [Member] | Transmission
Contractual Obligation [Line Items]
Purchase Obligation, Due in Next Twelve Months		101
Purchase Obligation, Due in Second Year		86
Purchase Obligation, Due in Third Year		77
Purchase Obligation, Due in Fourth Year		71
Purchase Obligation, Due in Fifth Year		56
Purchase Obligation, Due after Fifth Year		429
Purchase Obligation		820
PacifiCorp [Member] | Easements [Member]
Contractual Obligation [Line Items]
Purchase Obligation, Due in Next Twelve Months		10
Purchase Obligation, Due in Second Year		12
Purchase Obligation, Due in Third Year		12
Purchase Obligation, Due in Fourth Year		12
Purchase Obligation, Due in Fifth Year		11
Purchase Obligation, Due after Fifth Year		349
Purchase Obligation		406
PacifiCorp [Member] | Maintenance, service and other contracts [Member]
Contractual Obligation [Line Items]
Purchase Obligation, Due in Next Twelve Months		329
Purchase Obligation, Due in Second Year		49
Purchase Obligation, Due in Third Year		41
Purchase Obligation, Due in Fourth Year		34
Purchase Obligation, Due in Fifth Year		32
Purchase Obligation, Due after Fifth Year		204
Purchase Obligation		$ 689
[1]	Amounts included for comparability and accounted for in accordance with ASC Topic 840, "Leases".
[2]	(1) Amounts included for comparability and accounted for in accordance with ASC 840, "Leases".

Commitments and Contingencies_6

Commitments and Contingencies - MEC - Commitments Table (Details) $ in Millions	Dec. 31, 2019USD ($)
Contractual Obligation [Line Items]
Purchase Obligation, Due in Next Twelve Months	$ 2,400
Contractual Obligation, Due in Next Twelve Months	4,631
Contractual Obligation, Due in Second Year	2,458
Contractual Obligation, Due in Third Year	1,614
Contractual Obligation, Due in Fourth Year	1,467
Contractual Obligation, Due in Fifth Year	1,421
Contractual Obligation, Due after Fifth Year	17,467
Contractual Obligation	29,058
Capital Addition Purchase Commitments [Member]
Contractual Obligation [Line Items]
Purchase Obligation, Due in Next Twelve Months	1,682
Purchase Obligation, Due in Second Year	521
Purchase Obligation, Due in Third Year	27
Purchase Obligation, Due in Fourth Year	2
Purchase Obligation, Due in Fifth Year	8
Purchase Obligation, Due after Fifth Year	0
Purchase Obligation	2,240
Easements [Member]
Contractual Obligation [Line Items]
Purchase Obligation, Due in Next Twelve Months	62
Purchase Obligation, Due in Second Year	68
Purchase Obligation, Due in Third Year	70
Purchase Obligation, Due in Fourth Year	72
Purchase Obligation, Due in Fifth Year	70
Purchase Obligation, Due after Fifth Year	2,259
Purchase Obligation	2,601
Maintenance, service and other contracts [Member]
Contractual Obligation [Line Items]
Purchase Obligation, Due in Next Twelve Months	669
Purchase Obligation, Due in Second Year	342
Purchase Obligation, Due in Third Year	324
Purchase Obligation, Due in Fourth Year	300
Purchase Obligation, Due in Fifth Year	255
Purchase Obligation, Due after Fifth Year	1,624
Purchase Obligation	3,514
MidAmerican Energy Company [Member]
Contractual Obligation [Line Items]
Contractual Obligation, Due in Next Twelve Months	1,144
Contractual Obligation, Due in Second Year	844
Contractual Obligation, Due in Third Year	327
Contractual Obligation, Due in Fourth Year	266
Contractual Obligation, Due in Fifth Year	178
Contractual Obligation, Due after Fifth Year	1,976
Contractual Obligation	4,735
MidAmerican Energy Company [Member] | Fuel contracts
Contractual Obligation [Line Items]
Purchase Obligation, Due in Next Twelve Months	114
Purchase Obligation, Due in Second Year	52
Purchase Obligation, Due in Third Year	48
Purchase Obligation, Due in Fourth Year	39
Purchase Obligation, Due in Fifth Year	0
Purchase Obligation, Due after Fifth Year	0
Purchase Obligation	253
MidAmerican Energy Company [Member] | Electric capacity and transmission
Contractual Obligation [Line Items]
Purchase Obligation, Due in Next Twelve Months	28
Purchase Obligation, Due in Second Year	24
Purchase Obligation, Due in Third Year	14
Purchase Obligation, Due in Fourth Year	8
Purchase Obligation, Due in Fifth Year	7
Purchase Obligation, Due after Fifth Year	29
Purchase Obligation	110
MidAmerican Energy Company [Member] | Natural gas contracts for gas operations
Contractual Obligation [Line Items]
Purchase Obligation, Due in Next Twelve Months	102
Purchase Obligation, Due in Second Year	61
Purchase Obligation, Due in Third Year	47
Purchase Obligation, Due in Fourth Year	24
Purchase Obligation, Due in Fifth Year	8
Purchase Obligation, Due after Fifth Year	23
Purchase Obligation	265
MidAmerican Energy Company [Member] | Capital Addition Purchase Commitments [Member]
Contractual Obligation [Line Items]
Purchase Obligation, Due in Next Twelve Months	670
Purchase Obligation, Due in Second Year	515
Purchase Obligation, Due in Third Year	27
Purchase Obligation, Due in Fourth Year	2
Purchase Obligation, Due in Fifth Year	4
Purchase Obligation, Due after Fifth Year	0
Purchase Obligation	1,218
MidAmerican Energy Company [Member] | Easements [Member]
Contractual Obligation [Line Items]
Purchase Obligation, Due in Next Twelve Months	32
Purchase Obligation, Due in Second Year	36
Purchase Obligation, Due in Third Year	37
Purchase Obligation, Due in Fourth Year	38
Purchase Obligation, Due in Fifth Year	39
Purchase Obligation, Due after Fifth Year	1,492
Purchase Obligation	1,674
MidAmerican Energy Company [Member] | Maintenance, service and other contracts [Member]
Contractual Obligation [Line Items]
Purchase Obligation, Due in Next Twelve Months	198
Purchase Obligation, Due in Second Year	156
Purchase Obligation, Due in Third Year	154
Purchase Obligation, Due in Fourth Year	155
Purchase Obligation, Due in Fifth Year	120
Purchase Obligation, Due after Fifth Year	432
Purchase Obligation	$ 1,215

Commitments and Contingencies C

Commitments and Contingencies Commitments and Contingencies - MEC - Transmission Rates (Details) - MidAmerican Energy Company [Member] $ in Millions	12 Months Ended
	Dec. 31, 2019USD ($)
Unfavorable Regulatory Action [Member]
Loss Contingencies [Line Items]
Loss Contingency Accrual	$ 16
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%

Commitments and Contingencies_7

Commitments and Contingencies - NPC - Legal (Details) - Nevada Power Company [Member] - MW	3 Months Ended	12 Months Ended		36 Months Ended
	Dec. 31, 2019	Dec. 31, 2019	Dec. 31, 2017	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	255
557 Megawatts of Coal Energy [Member]
Loss Contingencies [Line Items]
Coal-Fired Power Plant Capacity			557

Commitments and Contingencies_8

Commitments and Contingencies - NPC - Commitments Table (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Contractual Obligation [Line Items]
Purchase Obligation, Due in Next Twelve Months	$ 2,400
Contractual Obligation, Due in Next Twelve Months	4,631
Contractual Obligation, Due in Second Year	2,458
Contractual Obligation, Due in Third Year	1,614
Contractual Obligation, Due in Fourth Year	1,467
Contractual Obligation, Due in Fifth Year	1,421
Contractual Obligation, Due after Fifth Year	17,467
Contractual Obligation	29,058
Fuel, capacity and transmission contract commitments [Member]
Contractual Obligation [Line Items]
Purchase Obligation, Due in Next Twelve Months	2,218
Purchase Obligation, Due in Second Year	1,527
Purchase Obligation, Due in Third Year	1,193
Purchase Obligation, Due in Fourth Year	1,093
Purchase Obligation, Due in Fifth Year	1,088
Purchase Obligation, Due after Fifth Year	13,584
Purchase Obligation	20,703
Capital Addition Purchase Commitments [Member]
Contractual Obligation [Line Items]
Purchase Obligation, Due in Next Twelve Months	1,682
Purchase Obligation, Due in Second Year	521
Purchase Obligation, Due in Third Year	27
Purchase Obligation, Due in Fourth Year	2
Purchase Obligation, Due in Fifth Year	8
Purchase Obligation, Due after Fifth Year	0
Purchase Obligation	2,240
Easements [Member]
Contractual Obligation [Line Items]
Purchase Obligation, Due in Next Twelve Months	62
Purchase Obligation, Due in Second Year	68
Purchase Obligation, Due in Third Year	70
Purchase Obligation, Due in Fourth Year	72
Purchase Obligation, Due in Fifth Year	70
Purchase Obligation, Due after Fifth Year	2,259
Purchase Obligation	2,601
Maintenance, service and other contracts [Member]
Contractual Obligation [Line Items]
Purchase Obligation, Due in Next Twelve Months	669
Purchase Obligation, Due in Second Year	342
Purchase Obligation, Due in Third Year	324
Purchase Obligation, Due in Fourth Year	300
Purchase Obligation, Due in Fifth Year	255
Purchase Obligation, Due after Fifth Year	1,624
Purchase Obligation	3,514
Nevada Power Company [Member]
Contractual Obligation [Line Items]
Contractual Obligation, Due in Next Twelve Months	618
Contractual Obligation, Due in Second Year	448
Contractual Obligation, Due in Third Year	408
Contractual Obligation, Due in Fourth Year	452
Contractual Obligation, Due in Fifth Year	509
Contractual Obligation, Due after Fifth Year	8,170
Contractual Obligation	10,605
Easement, Expense	7	$ 4	$ 4
Nevada Power Company [Member] | Fuel, capacity and transmission contract commitments [Member]
Contractual Obligation [Line Items]
Purchase Obligation, Due in Next Twelve Months	539
Purchase Obligation, Due in Second Year	390
Purchase Obligation, Due in Third Year	319
Purchase Obligation, Due in Fourth Year	321
Purchase Obligation, Due in Fifth Year	324
Purchase Obligation, Due after Fifth Year	3,432
Purchase Obligation	5,325
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	1
Purchase Obligation, Due in Second Year	6
Purchase Obligation, Due in Third Year	41
Purchase Obligation, Due in Fourth Year	92
Purchase Obligation, Due in Fifth Year	157
Purchase Obligation, Due after Fifth Year	4,677
Purchase Obligation	4,974
Nevada Power Company [Member] | Capital Addition Purchase Commitments [Member]
Contractual Obligation [Line Items]
Purchase Obligation, Due in Next Twelve Months	23
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	23
Nevada Power Company [Member] | Easements [Member]
Contractual Obligation [Line Items]
Purchase Obligation, Due in Next Twelve Months	4
Purchase Obligation, Due in Second Year	4
Purchase Obligation, Due in Third Year	5
Purchase Obligation, Due in Fourth Year	5
Purchase Obligation, Due in Fifth Year	3
Purchase Obligation, Due after Fifth Year	43
Purchase Obligation	64
Nevada Power Company [Member] | Maintenance, service and other contracts [Member]
Contractual Obligation [Line Items]
Purchase Obligation, Due in Next Twelve Months	51
Purchase Obligation, Due in Second Year	48
Purchase Obligation, Due in Third Year	43
Purchase Obligation, Due in Fourth Year	34
Purchase Obligation, Due in Fifth Year	25
Purchase Obligation, Due after Fifth Year	18
Purchase Obligation	$ 219

Commitments and Contingencies_9

Commitments and Contingencies - SPPC - Commitments Table (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Contractual Obligation [Line Items]
Purchase Obligation, Due in Next Twelve Months	$ 2,400
Contractual Obligation, Due in Next Twelve Months	4,631
Contractual Obligation, Due in Second Year	2,458
Contractual Obligation, Due in Third Year	1,614
Contractual Obligation, Due in Fourth Year	1,467
Contractual Obligation, Due in Fifth Year	1,421
Contractual Obligation, Due after Fifth Year	17,467
Contractual Obligation	29,058
Fuel, capacity and transmission contract commitments [Member]
Contractual Obligation [Line Items]
Purchase Obligation, Due in Next Twelve Months	2,218
Purchase Obligation, Due in Second Year	1,527
Purchase Obligation, Due in Third Year	1,193
Purchase Obligation, Due in Fourth Year	1,093
Purchase Obligation, Due in Fifth Year	1,088
Purchase Obligation, Due after Fifth Year	13,584
Purchase Obligation	20,703
Easements [Member]
Contractual Obligation [Line Items]
Purchase Obligation, Due in Next Twelve Months	62
Purchase Obligation, Due in Second Year	68
Purchase Obligation, Due in Third Year	70
Purchase Obligation, Due in Fourth Year	72
Purchase Obligation, Due in Fifth Year	70
Purchase Obligation, Due after Fifth Year	2,259
Purchase Obligation	2,601
Maintenance, service and other contracts [Member]
Contractual Obligation [Line Items]
Purchase Obligation, Due in Next Twelve Months	669
Purchase Obligation, Due in Second Year	342
Purchase Obligation, Due in Third Year	324
Purchase Obligation, Due in Fourth Year	300
Purchase Obligation, Due in Fifth Year	255
Purchase Obligation, Due after Fifth Year	1,624
Purchase Obligation	3,514
Sierra Pacific Power Company [Member]
Contractual Obligation [Line Items]
Contractual Obligation, Due in Next Twelve Months	274
Contractual Obligation, Due in Second Year	219
Contractual Obligation, Due in Third Year	164
Contractual Obligation, Due in Fourth Year	129
Contractual Obligation, Due in Fifth Year	128
Contractual Obligation, Due after Fifth Year	1,823
Contractual Obligation	2,737
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	260
Purchase Obligation, Due in Second Year	198
Purchase Obligation, Due in Third Year	114
Purchase Obligation, Due in Fourth Year	84
Purchase Obligation, Due in Fifth Year	83
Purchase Obligation, Due after Fifth Year	863
Purchase Obligation	1,602
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	1
Purchase Obligation, Due in Second Year	11
Purchase Obligation, Due in Third Year	41
Purchase Obligation, Due in Fourth Year	41
Purchase Obligation, Due in Fifth Year	42
Purchase Obligation, Due after Fifth Year	921
Purchase Obligation	1,057
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	11
Purchase Obligation, Due in Second Year	8
Purchase Obligation, Due in Third Year	7
Purchase Obligation, Due in Fourth Year	2
Purchase Obligation, Due in Fifth Year	1
Purchase Obligation, Due after Fifth Year	9
Purchase Obligation	$ 38

Preferred Stock - PacifiCorp (D

Preferred Stock - PacifiCorp (Details) - PacifiCorp [Member] shares in Thousands	12 Months Ended
	Dec. 31, 2019Payments$ / sharesshares	Dec. 31, 2018$ / sharesshares
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]
Class of Stock [Line Items]
Preferred Stock, Shares Authorized	127	127
Preferred Stock, Shares Issued	0	0
Preferred Stock, Shares Outstanding	0	0
Preferred Stock, Dividend Rate, Percentage	5.00%	5.00%
Preferred Stock Class, Serial Preferred [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]
Class of Stock [Line Items]
Preferred Stock, Shares Authorized	16,000	16,000
Shares Issued for Certain Class of Preferred Stock	0	0
Shares Outstanding for Certain Class of Preferred Stock	0	0
Minimum [Member] | Preferred Stock Class, Serial Preferred [Member]
Class of Stock [Line Items]
Preferred Stock, Dividend Rate, Percentage	6.00%
Maximum [Member] | Preferred Stock Class, Serial Preferred [Member]
Class of Stock [Line Items]
Preferred Stock, Dividend Rate, Percentage	7.00%

BHE Shareholders' Equity (Detai

BHE Shareholders' Equity (Details) - USD ($) $ in Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Jun. 30, 2017
Class of Stock [Line Items]
BHE junior subordinated debentures		$ 100	$ 100
Common stock, value, repurchased		293	$ 107	$ 19
Berkshire Hathaway Energy [Member] | BHE Junior Subordinated Debentures, due June 2057 [Member]
Class of Stock [Line Items]
Debt Instrument, Interest Rate, Stated Percentage					5.00%
Conversion of Stock, Shares Converted	181,819
BHE [Member] | BHE Junior Subordinated Debentures, due June 2057 [Member]
Class of Stock [Line Items]
Debt Instrument, Interest Rate, Stated Percentage			5.00%
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%	5.00%

BHE Shareholders' Equity - Rest

BHE Shareholders' Equity - Restricted Net Assets (Details) $ in Billions	Dec. 31, 2019USD ($)
Stockholders' Equity Note [Abstract]
BHE restricted net assets	$ 18.1
BHE's subsidiaries restricted net assets	$ 17.5

Common Shareholder's Equity - P

Common Shareholder's Equity - PacifiCorp (Details) - PacifiCorp [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Class of Stock [Line Items]
Dividends, Common Stock, Cash	$ 175	$ 450	$ 600
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	$ 2,400

Components of Accumulated Oth_3

Components of Accumulated Other Comprehensive Loss, Net (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	$ (1,945)
Other comprehensive (loss) income, unrecognized amounts on retirement benefits	(59)	$ 25	$ 64
Other comprehensive (loss) income, foreign currency translation adjustment	327	(494)	546
Other comprehensive (loss) income, unrealized gains on available-for-sale securities	0	0	500
Other comprehensive (loss) income, unrealized gains on cash flow hedges	(29)	7	3
Other Comprehensive Income (Loss), Net of Tax	239	(462)	1,113
Ending balance	(1,706)	(1,945)
Accumulated Other Comprehensive Loss, Net [Member]
Accumulated Other Comprehensive Loss, Net [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification		(1,085)
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance, unrecognized amounts on retirement benefits	(358)	(383)	(447)
Balance, foreign currency translation adjustment	(1,623)	(1,129)	(1,675)
Beginning balance	0	1,085	585
Beginning balance	36	29	26
Beginning balance	(1,945)	(398)	(1,511)
Other comprehensive (loss) income, unrecognized amounts on retirement benefits	(59)	25	64
Other comprehensive (loss) income, foreign currency translation adjustment	327	(494)	546
Other comprehensive (loss) income, unrealized gains on available-for-sale securities	0	0	500
Other comprehensive (loss) income, unrealized gains on cash flow hedges	(29)	7	3
Other Comprehensive Income (Loss), Net of Tax	239	(462)	1,113
Balance, unrecognized amounts on retirement benefits	(417)	(358)	(383)
Balance, foreign currency translation adjustment	(1,296)	(1,623)	(1,129)
Ending balance	0	0	1,085
Ending balance	7	36	29
Ending balance	$ (1,706)	$ (1,945)	$ (398)

Components of Accumulated Oth_4

Components of Accumulated Other Comprehensive Loss, Net - PacifiCorp (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
PacifiCorp [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Accumulated Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax	$ (16)	$ (13)

Variable-Interest Entities - Pa

Variable-Interest Entities - PacifiCorp (Details) - PacifiCorp [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Variable Interest Entity, Not Primary Beneficiary [Member]
Schedule of Equity Method Investments [Line Items]
Variable Interest Entity, Qualitative or Quantitative Information, Ownership Percentage	66.67%
Variable Interest Entity, Nonconsolidated, Carrying Amount, Assets and Liabilities, Net	$ 81	$ 100
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	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Berkshire Hathaway Energy [Member]
Preferred Securities of Subsidiaries [Line Items]
Preferred stock of subsidiaries, value, outstanding noncontrolling interest, amount represented by preferred stock	$ 58	$ 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	$ 56
Noncontrolling interest, dividend requirements of preferred stock	0.08061	0.08061
PacifiCorp [Member]
Preferred Securities of Subsidiaries [Line Items]
Preferred stock of subsidiaries, value, outstanding noncontrolling interest, amount represented by preferred stock	$ 2	$ 2

Segment Information (Details)

Segment Information (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Segment Reporting Information [Line Items]
Revenues		$ 19,844	$ 19,787	$ 18,614
Depreciation and amortization - energy operations		2,965	2,933	2,580
Depreciation and amortization		3,011	2,984	2,646
Operating income (loss)		4,150	4,072	4,522
Interest expense		1,912	1,838	1,841
Capitalized interest		(77)	(61)	(45)
Allowance for equity funds		173	104	76
Other Interest and Dividend Income		117	113	111
Gain (Loss) on Investments		(288)	(538)	14
Other, net		97	(9)	(420)
Income before income tax expense and equity income		2,414	1,965	2,507
Income tax benefit		(598)	(583)	(554)
Payments to Acquire Property, Plant, and Equipment		7,364	6,241	4,571
Property, plant and equipment, net		73,305	68,087	65,357
Assets		100,051	92,189	90,208
PacifiCorp [Member]
Segment Reporting Information [Line Items]
Revenues		5,068	5,026	5,237
Depreciation and amortization - energy operations		954	979	796
Operating income (loss)		1,072	1,051	1,440
Interest expense		401	384	381
Income tax benefit		61	5	362
Payments to Acquire Property, Plant, and Equipment		2,175	1,257	769
Property, plant and equipment, net		20,973	19,570	19,183
Assets		24,861	23,478	23,086
MidAmerican Funding [Member]
Segment Reporting Information [Line Items]
Revenues		2,927	3,053	2,846
Depreciation and amortization - energy operations		638	609	500
Operating income (loss)		549	550	544
Interest expense		302	247	237
Income tax benefit		(377)	(262)	(202)
Payments to Acquire Property, Plant, and Equipment		2,810	2,332	1,776
Property, plant and equipment, net		18,377	16,169	14,221
Assets		22,664	20,029	18,444
NV Energy [Member]
Segment Reporting Information [Line Items]
Revenues		3,037	3,039	3,015
Depreciation and amortization - energy operations		482	456	422
Operating income (loss)		655	607	766
Interest expense		229	224	233
Income tax benefit		98	100	221
Payments to Acquire Property, Plant, and Equipment		657	503	456
Property, plant and equipment, net		9,613	9,367	9,276
Assets		14,128	14,119	13,903
Northern Powergrid Holdings [Member]
Segment Reporting Information [Line Items]
Revenues		1,013	1,020	949
Depreciation and amortization - energy operations		254	250	214
Operating income (loss)		472	486	488
Interest expense		139	141	133
Income tax benefit		59	61	57
Payments to Acquire Property, Plant, and Equipment		602	566	579
Property, plant and equipment, net		6,606	6,007	6,075
Assets		8,385	7,427	7,565
BHE Pipeline Group [Member]
Segment Reporting Information [Line Items]
Revenues		1,131	1,203	993
Depreciation and amortization - energy operations		115	126	159
Operating income (loss)		572	525	473
Interest expense		52	43	43
Income tax benefit		138	119	170
Payments to Acquire Property, Plant, and Equipment		687	427	286
Property, plant and equipment, net		5,482	4,904	4,587
Assets		6,100	5,511	5,134
BHE Transmission [Member]
Segment Reporting Information [Line Items]
Revenues		707	710	699
Depreciation and amortization - energy operations		240	247	239
Operating income (loss)		323	313	322
Interest expense		157	167	169
Income tax benefit		11	7	(124)
Payments to Acquire Property, Plant, and Equipment		247	270	334
Property, plant and equipment, net		6,157	5,824	6,330
Assets		8,776	8,424	9,009
BHE Renewables [Member]
Segment Reporting Information [Line Items]
Revenues		932	908	838
Depreciation and amortization - energy operations		282	268	251
Operating income (loss)		336	325	316
Interest expense		174	201	204
Income tax benefit		(325)	(158)	(795)
Payments to Acquire Property, Plant, and Equipment		122	817	323
Property, plant and equipment, net		5,976	6,155	5,637
Assets		9,961	8,666	7,687
HomeServices [Member]
Segment Reporting Information [Line Items]
Revenues		4,473	4,214	3,443
Depreciation and amortization		47	51	66
Operating income (loss)		222	214	214
Interest expense		25	23	7
Income tax benefit		51	52	49
Payments to Acquire Property, Plant, and Equipment		54	47	37
Property, plant and equipment, net		161	141	117
Assets		3,846	2,797	2,722
Berkshire Hathaway Energy And Other [Member]
Segment Reporting Information [Line Items]
Revenues	[1]	556	614	594
Depreciation and amortization - energy operations	[1]	(1)	(2)	(1)
Other [Member]
Segment Reporting Information [Line Items]
Operating income (loss)	[1]	(51)	1	(41)
Interest expense	[1]	433	408	434
Income tax benefit	[1]	(314)	(507)	(292)
Payments to Acquire Property, Plant, and Equipment		10	22	11
Property, plant and equipment, net		(40)	(50)	(69)
Assets		1,330	1,738	2,658
UNITED STATES
Segment Reporting Information [Line Items]
Revenues		18,108	18,014	16,916
Income before income tax expense and equity income		1,866	1,425	1,927
Property, plant and equipment, net		60,634	56,362	53,065
UNITED KINGDOM
Segment Reporting Information [Line Items]
Revenues		1,011	1,017	948
Income before income tax expense and equity income		326	307	313
Property, plant and equipment, net		6,504	5,895	5,953
CANADA
Segment Reporting Information [Line Items]
Revenues		706	710	699
Income before income tax expense and equity income		178	155	167
Property, plant and equipment, net		6,157	5,817	6,323
The Philippines and other [Member]
Segment Reporting Information [Line Items]
Revenues		19	46	51
Income before income tax expense and equity income		44	78	100
Property, plant and equipment, net		$ 10	$ 13	$ 16
[1]	(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, 2019	Dec. 31, 2018
Goodwill [Roll Forward]
Beginning balance	$ 9,595	$ 9,678
Acquisitions	29	79
Foreign currency translation	98	(162)
Ending balance	9,722	9,595
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	952	991
Acquisitions	0	0
Foreign currency translation	26	(39)
Ending balance	978	952
BHE Pipeline Group [Member]
Goodwill [Roll Forward]
Beginning balance	73	73
Acquisitions	0	0
Foreign currency translation	0	0
Ending balance	73	73
BHE Transmission [Member]
Goodwill [Roll Forward]
Beginning balance	1,448	1,571
Acquisitions	0	0
Foreign currency translation	72	(123)
Ending balance	1,520	1,448
BHE Renewables [Member]
Goodwill [Roll Forward]
Beginning balance	95	95
Acquisitions	0	0
Foreign currency translation	0	0
Ending balance	95	95
HomeServices [Member]
Goodwill [Roll Forward]
Beginning balance	1,427	1,348
Acquisitions	29	79
Foreign currency translation	0	0
Ending balance	1,456	1,427
Other [Member]
Goodwill [Roll Forward]
Beginning balance	0	0
Acquisitions	0	0
Foreign currency translation	0	0
Ending balance	$ 0	$ 0

Segment Information - MEC (Deta

Segment Information - MEC (Details) $ in Millions	12 Months Ended
	Dec. 31, 2019USD ($)OperatingSegmentsTheNumberOfReportableSegments	Dec. 31, 2018USD ($)	Dec. 31, 2017USD ($)
Segment Reporting Information [Line Items]
Number of Reportable Segments | OperatingSegments	8
Revenues	$ 19,844	$ 19,787	$ 18,614
Operating income (loss)	4,150	4,072	4,522
Interest expense	1,912	1,838	1,841
Income tax (benefit) expense	(598)	(583)	(554)
Net income attributable to BHE shareholders	2,950	2,568	2,870
Payments to Acquire Property, Plant, and Equipment	7,364	6,241	4,571
Assets	$ 100,051	92,189	90,208
MidAmerican Energy Company [Member]
Segment Reporting Information [Line Items]
Number of Reportable Segments | TheNumberOfReportableSegments	2
Revenues	$ 2,925	3,049	2,837
Utilities Operating Expense, Depreciation and Amortization	639	609	500
Operating income (loss)	548	551	543
Interest expense	281	227	214
Income tax (benefit) expense	(371)	(255)	(183)
Net income attributable to BHE shareholders	793	682	605
Payments to Acquire Property, Plant, and Equipment	2,810	2,332	1,773
Assets	20,564	17,920	16,318
MidAmerican Energy Company [Member] | Electricity, US Regulated [Member]
Segment Reporting Information [Line Items]
Revenues	2,237	2,283	2,108
Utilities Operating Expense, Depreciation and Amortization	593	565	458
Operating income (loss)	473	469	472
Interest expense	259	208	196
Income tax (benefit) expense	(384)	(273)	(212)
Net income attributable to BHE shareholders	739	628	570
Payments to Acquire Property, Plant, and Equipment	2,684	2,223	1,686
Assets	19,093	16,511	14,914
MidAmerican Energy Company [Member] | Natural Gas, US Regulated [Member]
Segment Reporting Information [Line Items]
Revenues	660	754	719
Utilities Operating Expense, Depreciation and Amortization	46	44	42
Operating income (loss)	71	81	72
Interest expense	22	19	18
Income tax (benefit) expense	12	16	29
Net income attributable to BHE shareholders	52	54	35
Payments to Acquire Property, Plant, and Equipment	126	109	87
Assets	1,468	1,406	1,403
MidAmerican Energy Company [Member] | Corporate and Other [Member]
Segment Reporting Information [Line Items]
Revenues	28	12	10
Operating income (loss)	4	1	(1)
Income tax (benefit) expense	1	2	0
Net income attributable to BHE shareholders	2	0	0
Assets	$ 3	$ 3	$ 1

Segment Information - MidAmeric

Segment Information - MidAmerican Funding (Details) $ in Millions	12 Months Ended
	Dec. 31, 2019USD ($)OperatingSegmentsTheNumberOfReportableSegments	Dec. 31, 2018USD ($)	Dec. 31, 2017USD ($)
Segment Reporting Information [Line Items]
Number of Reportable Segments | OperatingSegments	8
Revenues	$ 19,844	$ 19,787	$ 18,614
Operating income (loss)	4,150	4,072	4,522
Interest expense	1,912	1,838	1,841
Income tax (benefit) expense	(598)	(583)	(554)
Net income (loss) attributable to parent	2,950	2,568	2,870
Payments to Acquire Property, Plant, and Equipment	7,364	6,241	4,571
Assets	100,051	92,189	90,208
Goodwill	$ 9,722	9,595	9,678
MidAmerican Funding, LLC and Subsidiaries [Domain]
Segment Reporting Information [Line Items]
Number of Reportable Segments | TheNumberOfReportableSegments	2
Revenues	$ 2,927	3,053	2,846
Utilities Operating Expense, Depreciation and Amortization	639	609	500
Operating income (loss)	549	550	544
Interest expense	302	247	237
Income tax (benefit) expense	(377)	(262)	(202)
Net income (loss) attributable to parent	781	669	574
Payments to Acquire Property, Plant, and Equipment	2,810	2,332	1,773
Assets	21,840	19,202	17,621
Goodwill	1,270	1,270
MidAmerican Funding, LLC and Subsidiaries [Domain] | Electricity, US Regulated [Member]
Segment Reporting Information [Line Items]
Revenues	2,237	2,283	2,108
Utilities Operating Expense, Depreciation and Amortization	593	565	458
Operating income (loss)	473	469	472
Interest expense	259	208	196
Income tax (benefit) expense	(384)	(273)	(212)
Net income (loss) attributable to parent	739	628	570
Payments to Acquire Property, Plant, and Equipment	2,684	2,223	1,686
Assets	20,284	17,702	16,105
Goodwill	1,191	1,191
MidAmerican Funding, LLC and Subsidiaries [Domain] | Natural Gas, US Regulated [Member]
Segment Reporting Information [Line Items]
Revenues	660	754	719
Utilities Operating Expense, Depreciation and Amortization	46	44	42
Operating income (loss)	71	81	72
Interest expense	22	19	18
Income tax (benefit) expense	12	16	29
Net income (loss) attributable to parent	52	54	35
Payments to Acquire Property, Plant, and Equipment	126	109	87
Assets	1,547	1,485	1,482
Goodwill	79	79
MidAmerican Funding, LLC and Subsidiaries [Domain] | Corporate and Other [Member]
Segment Reporting Information [Line Items]
Revenues	30	16	19
Operating income (loss)	5	0	0
Interest expense	21	20	23
Income tax (benefit) expense	(5)	(5)	(19)
Net income (loss) attributable to parent	(10)	(13)	(31)
Assets	$ 9	$ 15	$ 34

Segment Information - SPPC (Det

Segment Information - SPPC (Details) $ in Millions		3 Months Ended								12 Months Ended
		Dec. 31, 2019USD ($)	Sep. 30, 2019USD ($)	Jun. 30, 2019USD ($)	Mar. 31, 2019USD ($)	Dec. 31, 2018USD ($)	Sep. 30, 2018USD ($)	Jun. 30, 2018USD ($)	Mar. 31, 2018USD ($)	Dec. 31, 2019USD ($)OperatingSegmentsTheNumberOfReportableSegments	Dec. 31, 2018USD ($)	Dec. 31, 2017USD ($)
Segment Reporting Information [Line Items]
Number of Reportable Segments | OperatingSegments										8
Revenues										$ 19,844	$ 19,787	$ 18,614
Operating income (loss)										4,150	4,072	4,522
Interest expense										1,912	1,838	1,841
Capitalized interest and allowance for borrowed funds										77	61	45
Allowance for equity funds										173	104	76
Other, net										97	(9)	(420)
Income before income tax expense and equity income										2,414	1,965	2,507
Assets		$ 100,051				$ 92,189				$ 100,051	92,189	90,208
Sierra Pacific Power Company [Member]
Segment Reporting Information [Line Items]
Number of Reportable Segments | TheNumberOfReportableSegments										2
Revenues										$ 889	855	812
Operating income (loss)		40	$ 67	$ 27	$ 37	30	$ 56	$ 19	$ 47	171	152	197
Interest expense										48	44	43
Capitalized interest and allowance for borrowed funds										1	1	2
Allowance for equity funds										3	4	3
Other, net										4	9	5
Income before income tax expense and equity income										131	122	164
Assets		3,671				3,569				3,671	3,569	3,413
Sierra Pacific Power Company [Member] | Electricity, US Regulated [Member]
Segment Reporting Information [Line Items]
Revenues										770	752	713
Operating income (loss)										150	136	175
Assets		3,319				3,177				3,319	3,177	3,103
Sierra Pacific Power Company [Member] | Natural Gas, US Regulated [Member]
Segment Reporting Information [Line Items]
Revenues										119	103	99
Operating income (loss)										21	16	22
Assets		308				314				308	314	300
Sierra Pacific Power Company [Member] | Regulated common assets [Member]
Segment Reporting Information [Line Items]
Assets	[1]	$ 44				$ 78				$ 44	$ 78	$ 10
[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) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Subsequent Event [Line Items]
Par value	$ 39,634
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%	3.95%

Unaudited Quarterly Operating_3

Unaudited Quarterly Operating Results - NPC (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Quarterly Operating Results [Line Items]
Revenues									$ 19,844	$ 19,787	$ 18,614
Operating income (loss)									4,150	4,072	4,522
Net income attributable to BHE shareholders									2,950	2,568	2,870
Nevada Power Company [Member]
Quarterly Operating Results [Line Items]
Revenues	$ 420	$ 806	$ 527	$ 395	$ 407	$ 820	$ 562	$ 395	2,148	2,184	2,206
Operating income (loss)	67	244	123	45	37	247	122	40	479	446	565
Net income attributable to BHE shareholders	$ 24	$ 165	$ 69	$ 6	$ (2)	$ 164	$ 64	$ 0	$ 264	$ 226	$ 255

Unaudited Quarterly Operating_4

Unaudited Quarterly Operating Results - SPPC (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Quarterly Operating Results [Line Items]
Revenues									$ 19,844	$ 19,787	$ 18,614
Operating income (loss)									4,150	4,072	4,522
Net income attributable to BHE shareholders									2,950	2,568	2,870
Sierra Pacific Power Company [Member]
Quarterly Operating Results [Line Items]
Revenues									889	855	812
Operating income (loss)	$ 40	$ 67	$ 27	$ 37	$ 30	$ 56	$ 19	$ 47	171	152	197
Net income attributable to BHE shareholders	23	44	14	22	16	35	7	34	103	92	109
Sierra Pacific Power Company [Member] | Electricity, US Regulated [Member]
Quarterly Operating Results [Line Items]
Revenues	184	232	172	182	177	225	169	181	770	752	713
Sierra Pacific Power Company [Member] | Natural Gas, US Regulated [Member]
Quarterly Operating Results [Line Items]
Revenues	$ 44	$ 16	$ 22	$ 37	$ 29	$ 14	$ 19	$ 41	$ 119	$ 103	$ 99

Schedule I Condensed Balance _2

Schedule I Condensed Balance Sheets (Details) - USD ($) $ in Millions		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents		$ 1,040	$ 627
Accounts receivable		1,910	2,038
Other current assets		839	943
Total current assets		5,913	5,147
Goodwill		9,722	9,595	$ 9,678
Other assets		2,090	1,561
Total assets		100,051	92,189	90,208
Current liabilities:
Short-term debt	[1]	3,214	2,516
Total current liabilities		10,257	8,770
BHE senior debt		8,231	8,577
BHE junior subordinated debentures		100	100
Long-term Debt		39,353	36,774
Other long-term liabilities		3,649	3,134
Total liabilities		67,473	62,466
Shareholders' equity:
Common stock		0	0
Additional paid-in capital		6,389	6,371
Long-term income tax receivable		(530)	(457)
Retained earnings		28,296	25,624
Accumulated other comprehensive loss, net		(1,706)	(1,945)
Total shareholders' equity		32,449	29,593
Noncontrolling interest		129	130
Total equity		32,578	29,723	28,308	$ 24,463
Total liabilities and shareholder's equity		100,051	92,189
Parent Company [Member]
Current assets:
Cash and cash equivalents		13	9	346	33
Accounts Receivable, Related Parties		87	100
Due from Affiliates		181	156
Income tax receivable		3	103
Other current assets		8	15
Total current assets		292	383
Investments in subsidiaries		40,204	36,602
Other Investments		1,300	1,579
Goodwill		1,221	1,221
Other assets		695	546
Total assets		43,712	40,331
Current liabilities:
Accounts payable and other current liabilities		194	183
Notes Payable, Related Parties, Current		240	328
Short-term debt		1,590	983
Current portion of senior debt		350	0
Total current liabilities		2,374	1,494
BHE senior debt		8,231	8,577
BHE junior subordinated debentures		100	100
Notes payable - affiliate		2	1
Other long-term liabilities		530	543
Total liabilities		11,237	10,715
Shareholders' equity:
Common stock		0	0
Additional paid-in capital		6,389	6,371
Retained earnings		28,296	25,624
Accumulated other comprehensive loss, net		(1,706)	(1,945)
Total shareholders' equity		32,449	29,593
Noncontrolling interest		26	23
Total equity		32,475	29,616
Total liabilities and shareholder's equity		43,712	40,331
MidAmerican Funding LLC [Member]
Current assets:
Cash and cash equivalents		0	0	$ 0	$ 0
Due from Affiliates		2	2
Total current assets		2	2
Investments in subsidiaries		8,346	8,002
Total assets		8,348	8,004
Current liabilities:
Other accrued current liabilities		6	6
Long-term Debt		240	240
Notes payable - affiliate		1	429
Total liabilities		247	675
Shareholders' equity:
Paid-in capital		1,679	1,679
Retained earnings		6,422	5,650
Total shareholders' equity		8,101	7,329
Total liabilities and shareholder's equity		$ 8,348	$ 8,004
[1]	(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 Statements

Schedule I Condensed Statements of Operations (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Operating costs and expenses:
Depreciation and amortization	$ 3,011	$ 2,984	$ 2,646
Total operating costs and expenses	15,694	15,715	14,092
Operating loss	4,150	4,072	4,522
Other income (expense):
Interest expense	(1,912)	(1,838)	(1,841)
Other, net	97	(9)	(420)
Total other income (expense)	(1,736)	(2,107)	(2,015)
Loss before income tax benefit and equity income	2,414	1,965	2,507
Income tax (benefit) expense	(598)	(583)	(554)
Equity income (loss)	(44)	43	(151)
Net income	2,968	2,591	2,910
Net income attributable to noncontrolling interests	18	23	40
Net income (loss) attributable to parent	2,950	2,568	2,870
Parent Company [Member]
Operating costs and expenses:
General and administration	49	21	55
Depreciation and amortization	5	4	4
Total operating costs and expenses	54	25	59
Operating loss	(54)	(25)	(59)
Other income (expense):
Interest expense	(452)	(438)	(475)
Other, net	(271)	(537)	(369)
Total other income (expense)	(723)	(975)	(844)
Loss before income tax benefit and equity income	(777)	(1,000)	(903)
Income tax (benefit) expense	(312)	(513)	(335)
Equity income (loss)	3,419	3,058	3,441
Net income	2,954	2,571	2,873
Net income attributable to noncontrolling interests	3	3	3
Net income (loss) attributable to parent	2,951	2,568	2,870
MidAmerican Funding LLC [Member]
Other income (expense):
Other, net	0	0	(30)
Interest Expense, Long-term Debt	(16)	(16)	(22)
Loss before income tax benefit and equity income	(16)	(16)	(52)
Income tax (benefit) expense	(5)	(5)	(22)
Equity income (loss)	792	680	604
Net income (loss) attributable to parent	$ 781	$ 669	$ 574

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, 2019	Dec. 31, 2018	Dec. 31, 2017
Condensed Financial Statements, Captions [Line Items]
Net income attributable to BHE shareholders	$ 2,950	$ 2,568	$ 2,870
Net income	2,968	2,591	2,910
Other comprehensive income (loss), net of tax	239	(462)	1,113
Comprehensive income	3,207	2,129	4,023
Comprehensive income attributable to noncontrolling interests	18	23	40
Comprehensive income attributable to BHE shareholders	3,189	2,106	3,983
Parent Company [Member]
Condensed Financial Statements, Captions [Line Items]
Net income attributable to BHE shareholders	2,951	2,568	2,870
Net income	2,954	2,571	2,873
Other comprehensive income (loss), net of tax	239	(462)	1,113
Comprehensive income	3,193	2,109	3,986
Comprehensive income attributable to noncontrolling interests	3	3	3
Comprehensive income attributable to BHE shareholders	3,190	2,106	3,983
MidAmerican Funding LLC [Member]
Condensed Financial Statements, Captions [Line Items]
Net income attributable to BHE shareholders	$ 781	$ 669	$ 574

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, 2019	Dec. 31, 2018	Dec. 31, 2017
Condensed Financial Statements, Captions [Line Items]
Cash flows from operating activities	$ 6,206	$ 6,770	$ 6,078
Cash flows from investing activities:
Purchases of marketable securities	(262)	(329)	(190)
Proceeds from sale of investments	238	287	202
Other, net	69	83	(12)
Net cash flows from investing activities	(8,963)	(6,989)	(6,079)
Cash flows from financing activities:
Proceeds from BHE senior debt	0	3,166	0
Payment for Debt Extinguishment or Debt Prepayment Cost	0	0	(435)
Payments for Repurchase of Common Stock	293	107	19
Net proceeds from (repayments of) short-term debt	684	(1,946)	2,361
Other, net	(52)	(41)	(73)
Net cash flows from financing activities	3,124	(174)	274
Cash and cash equivalents and restricted cash and cash equivalents at beginning of period	627
Cash and cash equivalents and restricted cash and cash equivalents at end of period	1,040	627
Parent Company [Member]
Condensed Financial Statements, Captions [Line Items]
Cash flows from operating activities	1,780	1,885	2,450
Cash flows from investing activities:
Investments in subsidiaries	(1,972)	(1,791)	(1,566)
Purchases of marketable securities	(42)	(44)	(71)
Proceeds from sale of investments	42	45	68
Notes receivable from affiliate, net	(112)	(72)	(305)
Other, net	(5)	(22)	(8)
Net cash flows from investing activities	(2,089)	(1,884)	(1,882)
Cash flows from financing activities:
Proceeds from BHE senior debt	0	3,166	0
Repayments of BHE senior debt	0	(1,045)	(1,379)
Repayments of BHE subordinated debt	0	0	(944)
Payment for Debt Extinguishment or Debt Prepayment Cost	0	0	(406)
Payments for Repurchase of Common Stock	293	107	19
Net proceeds from (repayments of) short-term debt	607	(2,348)	2,498
Other, net	(1)	(4)	(5)
Net cash flows from financing activities	313	(338)	(255)
Net change in cash and cash equivalents and restricted cash and cash equivalents	4	(337)	313
Cash and cash equivalents and restricted cash and cash equivalents at beginning of period	9	346	33
Cash and cash equivalents and restricted cash and cash equivalents at end of period	13	9	346
MidAmerican Funding LLC [Member]
Condensed Financial Statements, Captions [Line Items]
Cash flows from operating activities	(12)	2	(15)
Cash flows from investing activities:
Net cash flows from investing activities	0	0	0
Cash flows from financing activities:
Repayments of Long-term Debt	0	0	(86)
Payment for Debt Extinguishment or Debt Prepayment Cost	0	0	(29)
Net change in amounts payable to subsidiary	12	(2)	130
Net cash flows from financing activities	12	(2)	15
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, 2019	Dec. 31, 2018
Investments, Including Equity Method And Restricted Cash And Investments [Line Items]
Available-for-sale Securities, Equity Securities	$ 1,122	$ 1,435
Parent Company [Member]
Investments, Including Equity Method And Restricted Cash And Investments [Line Items]
Available-for-sale Securities, Equity Securities	$ 1,122	$ 1,435

Condensed Financial Statement_3

Condensed Financial Statements - Dividends and Distributions (Details) - Parent Company [Member] - USD ($) $ in Millions	1 Months Ended	12 Months Ended
	Jan. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Distribution [Line Items]
Proceeds from dividends received		$ 2,000	$ 2,300	$ 3,000
Subsequent Event [Member]
Distribution [Line Items]
Proceeds from dividends received	$ 118

Condensed Financial Statement_4

Condensed Financial Statements - Guarantees (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Tax Equity Contributions	$ 1,619	$ 698	$ 403
Parent Company [Member]
Debt Instrument [Line Items]
Guarantor obligations, related party disclosure	277
Tax Equity Contributions	$ 2,434

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, 2019	Dec. 31, 2018	Dec. 31, 2017
Condensed Financial Statements, Captions [Line Items]
Net change in amounts payable to subsidiary	$ 12	$ (2)	$ 130
MHC, Inc. [Member]
Condensed Financial Statements, Captions [Line Items]
Net change in amounts payable to subsidiary	$ 12	$ (2)	$ 130

Schedule II Consolidated Valu_2

Schedule II Consolidated Valuation and Qualifying Accounts (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
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		$ 42	$ 40	$ 33
Valuation Allowances and Reserves, Charged to Cost and Expense		47	43	42
Valuation Allowances and Reserves, Adjustments		0	0	0
SEC Schedule, 12-09, Valuation Allowances and Reserves, Deduction		(45)	(41)	(35)
Balance at End of Year		44	42	40
Reserves not deducted from assets [Member]
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	[1]	13	13	13
Valuation Allowances and Reserves, Charged to Cost and Expense	[1]	4	6	7
Valuation Allowances and Reserves, Adjustments	[1]	0	0	0
SEC Schedule, 12-09, Valuation Allowances and Reserves, Deduction	[1]	(5)	(6)	(7)
Balance at End of Year	[1]	$ 12	$ 13	$ 13
[1]	serves 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, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2019
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		$ 42	$ 40	$ 33
Valuation Allowances and Reserves, Charged to Cost and Expense		47	43	42
SEC Schedule, 12-09, Valuation Allowances and Reserves, Deduction		(45)	(41)	(35)
SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount		42	40	33	$ 44
Reserves not deducted from assets [Member]
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	[1]	13	13	13
Valuation Allowances and Reserves, Charged to Cost and Expense	[1]	4	6	7
SEC Schedule, 12-09, Valuation Allowances and Reserves, Deduction	[1]	(5)	(6)	(7)
SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount	[1]	13	13	13	12
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		7	7	7
Valuation Allowances and Reserves, Charged to Cost and Expense		9	8	8
SEC Schedule, 12-09, Valuation Allowances and Reserves, Deduction		(11)	(8)	(8)
SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount		7	7	7	5
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		13	13	13
Valuation Allowances and Reserves, Charged to Cost and Expense		4	6	7
SEC Schedule, 12-09, Valuation Allowances and Reserves, Deduction		(5)	(6)	(7)
SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount		$ 13	$ 13	$ 13	$ 12
[1]	serves 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, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
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		$ 44	$ 42	$ 40	$ 33
Valuation Allowances and Reserves, Charged to Cost and Expense		47	43	42
SEC Schedule, 12-09, Valuation Allowances and Reserves, Deduction		45	41	35
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]	12	13	13	13
Valuation Allowances and Reserves, Charged to Cost and Expense	[1]	4	6	7
SEC Schedule, 12-09, Valuation Allowances and Reserves, Deduction	[1]	5	6	7
MidAmerican Funding, LLC and Subsidiaries [Domain] | 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		5	7	7	7
Valuation Allowances and Reserves, Charged to Cost and Expense		9	8	8
SEC Schedule, 12-09, Valuation Allowances and Reserves, Deduction		11	8	8
MidAmerican Funding, LLC and Subsidiaries [Domain] | 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		12	13	13	$ 13
Valuation Allowances and Reserves, Charged to Cost and Expense		4	6	7
SEC Schedule, 12-09, Valuation Allowances and Reserves, Deduction		$ 5	$ 6	$ 7
[1]	serves 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 Revenue from Contract with Customer (Details) - USD ($) $ in Millions		3 Months Ended								12 Months Ended
		Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax										$ 14,837	$ 14,972
Revenues										19,844	19,787	$ 18,614
PacifiCorp [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax										4,986	4,890
Revenues										5,068	5,026	5,237
MidAmerican Funding [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax										2,904	3,032
Revenues										2,927	3,053	2,846
NV Energy, Inc. [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax										3,007	3,011
Revenues										3,037	3,039
Northern Powergrid Holdings [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax										912	931
Revenues										1,013	1,020	949
BHE Pipeline Group [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax										1,122	1,232
Revenues										1,131	1,203
BHE Transmission [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax										707	710
Revenues										707	710	699
BHE Renewables [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax										744	673
Revenues										932	908
Berkshire Hathaway Energy And Other [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax										455	493
Revenues	[1]									556	614	594
Regulated Operation [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax										13,433	13,612
Regulated Operation [Member] | PacifiCorp [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax										4,986	4,890
Regulated Operation [Member] | MidAmerican Funding [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax										2,874	3,018
Regulated Operation [Member] | NV Energy, Inc. [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax										3,007	3,011
Regulated Operation [Member] | Northern Powergrid Holdings [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax										876	892
Regulated Operation [Member] | BHE Pipeline Group [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax										1,122	1,232
Regulated Operation [Member] | BHE Transmission [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax										690	700
Regulated Operation [Member] | BHE Renewables [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax										0	0
Regulated Operation [Member] | Berkshire Hathaway Energy And Other [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax										(122)	(131)
Other customer revenue [Member] | Regulated Operation [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax										2	2
Other customer revenue [Member] | Regulated Operation [Member] | PacifiCorp [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax										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
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
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
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
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
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
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
Nonregulated products and services [Member] | Nonregulated Operation [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax										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
Nonregulated products and services [Member] | Nonregulated Operation [Member] | MidAmerican Funding [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax										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										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										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										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										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										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										577	624
Regulated interstate pipeline [Member] | Regulated Operation [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax										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
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
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
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
Regulated interstate pipeline [Member] | Regulated Operation [Member] | BHE Pipeline Group [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax										1,122	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
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
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										(118)	(125)
Regulated transmission and distribution [Member] | Regulated Operation [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax										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										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										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										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										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
Regulated transmission and distribution [Member] | Regulated Operation [Member] | BHE Transmission [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax										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
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	(1)
Regulated wholesale [Member] | Regulated Operation [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax										457	501
Regulated wholesale [Member] | Regulated Operation [Member] | PacifiCorp [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax										99	55
Regulated wholesale [Member] | Regulated Operation [Member] | MidAmerican Funding [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax										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										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
Regulated wholesale [Member] | Regulated Operation [Member] | BHE Pipeline Group [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax										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
Regulated wholesale [Member] | Regulated Operation [Member] | BHE Renewables [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax										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)	(4)
Regulated retail gas [Member] | Regulated Operation [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax										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
Regulated retail gas [Member] | Regulated Operation [Member] | MidAmerican Funding [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax										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										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
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
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
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
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
Regulated retail electric [Member] | Regulated Operation [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax										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										4,789	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										1,938	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										2,740	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
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
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
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
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										(2)	(1)
Non-contracts with customer revenue [Member]
Disaggregation of Revenue [Line Items]
Revenues										534	601
Non-contracts with customer revenue [Member] | PacifiCorp [Member]
Disaggregation of Revenue [Line Items]
Revenues										82	136
Non-contracts with customer revenue [Member] | MidAmerican Funding [Member]
Disaggregation of Revenue [Line Items]
Revenues										23	21
Non-contracts with customer revenue [Member] | NV Energy, Inc. [Member]
Disaggregation of Revenue [Line Items]
Revenues										30	28
Non-contracts with customer revenue [Member] | Northern Powergrid Holdings [Member]
Disaggregation of Revenue [Line Items]
Revenues										101	89
Non-contracts with customer revenue [Member] | BHE Pipeline Group [Member]
Disaggregation of Revenue [Line Items]
Revenues										9	(29)
Non-contracts with customer revenue [Member] | BHE Transmission [Member]
Disaggregation of Revenue [Line Items]
Revenues										0	0
Non-contracts with customer revenue [Member] | BHE Renewables [Member]
Disaggregation of Revenue [Line Items]
Revenues										188	235
Non-contracts with customer revenue [Member] | Berkshire Hathaway Energy And Other [Member]
Disaggregation of Revenue [Line Items]
Revenues										101	121
Electricity and natural gas [Member]
Disaggregation of Revenue [Line Items]
Revenues										15,371	15,573	15,171
Nevada Power Company [Member]
Disaggregation of Revenue [Line Items]
Revenues		$ 420	$ 806	$ 527	$ 395	$ 407	$ 820	$ 562	$ 395	2,148	2,184	2,206
Unbilled Contracts Receivable		109				106				109	106
Nevada Power Company [Member] | Regulated Operation [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax										2,123	2,160
Nevada Power Company [Member] | Non-contracts with customer revenue [Member]
Disaggregation of Revenue [Line Items]
Revenues										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										57	53
PacifiCorp [Member]
Disaggregation of Revenue [Line Items]
Revenues										5,068	5,026	$ 5,237	$ 5,201	$ 5,232
Unbilled Contracts Receivable		$ 245				$ 229				245	229
PacifiCorp [Member] | Regulated Operation [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax										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										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										98	103
PacifiCorp [Member] | Regulated wholesale [Member] | Regulated Operation [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax										99	55
PacifiCorp [Member] | Regulated retail electric [Member] | Regulated Operation [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax										4,711	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										1,783	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										1,522	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										1,176	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										230	234
PacifiCorp [Member] | Non-contracts with customer revenue [Member]
Disaggregation of Revenue [Line Items]
Revenues										$ 82	$ 136
[1]	(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 Revenue from Contracts with Customers - Real Estate Services (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 14,837	$ 14,972
Revenues	19,844	19,787	$ 18,614
Residential real estate brokerage and mortgage businesses [Member]
Disaggregation of Revenue [Line Items]
Revenues	4,473	4,214	3,443
Non-contracts with customer revenue [Member]
Disaggregation of Revenue [Line Items]
Revenues	534	601
HomeServices [Member]
Disaggregation of Revenue [Line Items]
Revenues	4,473	4,214	$ 3,443
HomeServices [Member] | Residential real estate brokerage [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	4,028	3,882
HomeServices [Member] | Real estate franchise [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	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	4,096	3,949
Revenues	4,473	4,214
HomeServices [Member] | Non-contracts with customer revenue [Member]
Disaggregation of Revenue [Line Items]
Revenues	$ 377	$ 265

Revenue from Contract with Cu_5

Revenue from Contract with Customer Revenue from Contracts with Customers - Remaining Performance Obligation (Details) - BHE Pipeline Group [Member] $ in Millions	Dec. 31, 2019USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	$ 871
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	5,136
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: (nil)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	$ 6,007

Revenue from Contract with Cu_6

Revenue from Contract with Customer Revenue from Contract with Customer PAC (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Revenue from External Customer [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 14,837	$ 14,972
Revenues	19,844	19,787	$ 18,614
Non-contracts with customer revenue [Member]
Revenue from External Customer [Line Items]
Revenues	534	601
PacifiCorp [Member]
Revenue from External Customer [Line Items]
Revenues	5,068	5,026	$ 5,237	$ 5,201	$ 5,232
PacifiCorp [Member] | Non-contracts with customer revenue [Member]
Revenue from External Customer [Line Items]
Revenues	82	136
Regulated Operation [Member]
Revenue from External Customer [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	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	9,465	9,419
Regulated Operation [Member] | Regulated wholesale [Member]
Revenue from External Customer [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	457	501
Regulated Operation [Member] | Regulated transmission and distribution [Member]
Revenue from External Customer [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	1,819	1,846
Regulated Operation [Member] | Other customer revenue [Member]
Revenue from External Customer [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	2	2
Regulated Operation [Member] | PacifiCorp [Member]
Revenue from External Customer [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	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	4,711	4,656
Regulated Operation [Member] | PacifiCorp [Member] | Regulated wholesale [Member]
Revenue from External Customer [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	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	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	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	1,783	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	1,522	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	1,176	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	$ 230	$ 234

Revenue from Contract with Cu_7

Revenue from Contract with Customer Revenue from Contract with Customer - MEC (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 14,837	$ 14,972
Revenues	19,844	19,787	$ 18,614
Non-contracts with customer revenue [Member]
Disaggregation of Revenue [Line Items]
Revenues	534	601
MidAmerican Energy Company and Subsidiaries [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	2,902	3,028
Revenues	2,925	3,049	2,837
MidAmerican Energy Company and Subsidiaries [Member] | Regulated retail [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	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	1,055	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	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	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	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	145	148
MidAmerican Energy Company and Subsidiaries [Member] | Regulated wholesale [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	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	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	28	11
MidAmerican Energy Company and Subsidiaries [Member] | Non-contracts with customer revenue [Member]
Disaggregation of Revenue [Line Items]
Revenues	23	21
Regulated Operation [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	13,433	13,612
Regulated Operation [Member] | Regulated retail electric [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	9,465	9,419
Regulated Operation [Member] | Regulated retail gas [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	686	737
Regulated Operation [Member] | Regulated wholesale [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	457	501
Regulated Operation [Member] | Other customer revenue [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	2	2
Electricity, US Regulated [Member] | MidAmerican Energy Company and Subsidiaries [Member]
Disaggregation of Revenue [Line Items]
Revenues	2,237	2,283	2,108
Electricity, US Regulated [Member] | Regulated Operation [Member] | MidAmerican Energy Company and Subsidiaries [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	2,216	2,265
Revenues	2,237	2,283
Electricity, US Regulated [Member] | 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	1,938	1,915
Electricity, US Regulated [Member] | 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	672	696
Electricity, US Regulated [Member] | 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	322	314
Electricity, US Regulated [Member] | 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	799	758
Electricity, US Regulated [Member] | 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	145	147
Electricity, US Regulated [Member] | 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	221	295
Electricity, US Regulated [Member] | 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	57	55
Electricity, US Regulated [Member] | Regulated Operation [Member] | MidAmerican Energy Company and Subsidiaries [Member] | Non-contracts with customer revenue [Member]
Disaggregation of Revenue [Line Items]
Revenues	21	18
Natural Gas, US Regulated [Member] | MidAmerican Energy Company and Subsidiaries [Member]
Disaggregation of Revenue [Line Items]
Revenues	660	754	719
Natural Gas, US Regulated [Member] | Regulated Operation [Member] | MidAmerican Energy Company and Subsidiaries [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	658	752
Revenues	660	754
Natural Gas, US Regulated [Member] | 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	570	636
Natural Gas, US Regulated [Member] | 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	383	421
Natural Gas, US Regulated [Member] | 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	132	153
Natural Gas, US Regulated [Member] | 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	17	22
Natural Gas, US Regulated [Member] | 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	38	39
Natural Gas, US Regulated [Member] | 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	0	1
Natural Gas, US Regulated [Member] | 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	88	116
Natural Gas, US Regulated [Member] | Regulated Operation [Member] | MidAmerican Energy Company and Subsidiaries [Member] | Non-contracts with customer revenue [Member]
Disaggregation of Revenue [Line Items]
Revenues	2	2
Corporate and Other [Member] | MidAmerican Energy Company and Subsidiaries [Member]
Disaggregation of Revenue [Line Items]
Revenues	28	12	$ 10
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	28	11
Revenues	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	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	$ 1

Revenue from Contract with Cu_8

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

Revenue from Contract with Cu_9

Revenue from Contract with Customer Revenue from Contract with Customer - NPC (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax									$ 14,837	$ 14,972
Revenues									19,844	19,787	$ 18,614
Non-contracts with customer revenue [Member]
Disaggregation of Revenue [Line Items]
Revenues									534	601
Regulated Operation [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax									13,433	13,612
Regulated Operation [Member] | Regulated retail electric [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax									9,465	9,419
Regulated Operation [Member] | Regulated retail gas [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax									686	737
Nevada Power Company [Member]
Disaggregation of Revenue [Line Items]
Revenues	$ 420	$ 806	$ 527	$ 395	$ 407	$ 820	$ 562	$ 395	2,148	2,184	$ 2,206
Nevada Power Company [Member] | Non-contracts with customer revenue [Member]
Disaggregation of Revenue [Line Items]
Revenues									25	24
Nevada Power Company [Member] | Regulated Operation [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax									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									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									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									1,141	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									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									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									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									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									$ 2,066	$ 2,107

Revenue from Contract with C_10

Revenue from Contract with Customer Revenue from Contract with Customer - SPPC (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 14,837	$ 14,972
Revenues	19,844	19,787	$ 18,614
Non-contracts with customer revenue [Member]
Disaggregation of Revenue [Line Items]
Revenues	534	601
Regulated Operation [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	13,433	13,612
Regulated Operation [Member] | Regulated retail electric [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	9,465	9,419
Regulated Operation [Member] | Regulated retail gas [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	686	737
Sierra Pacific Power Company [Member]
Disaggregation of Revenue [Line Items]
Revenues	889	855	$ 812
Sierra Pacific Power Company [Member] | Non-contracts with customer revenue [Member]
Disaggregation of Revenue [Line Items]
Revenues	6	6
Sierra Pacific Power Company [Member] | Electric Operations [Member]
Disaggregation of Revenue [Line Items]
Revenues	770	752
Sierra Pacific Power Company [Member] | Electric Operations [Member] | Non-contracts with customer revenue [Member]
Disaggregation of Revenue [Line Items]
Revenues	4	4
Sierra Pacific Power Company [Member] | Regulated Gas [Member]
Disaggregation of Revenue [Line Items]
Revenues	119	103
Sierra Pacific Power Company [Member] | Regulated Gas [Member] | Non-contracts with customer revenue [Member]
Disaggregation of Revenue [Line Items]
Revenues	2	2
Sierra Pacific Power Company [Member] | Regulated Operation [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	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	57	48
Sierra Pacific Power Company [Member] | Regulated Operation [Member] | Electric Operations [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	766	748
Sierra Pacific Power Company [Member] | Regulated Operation [Member] | Electric Operations [Member] | Regulated wholesale, transmission and other [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	57	48
Sierra Pacific Power Company [Member] | Regulated Operation [Member] | Regulated Gas [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	117	101
Sierra Pacific Power Company [Member] | Regulated Operation [Member] | Regulated Gas [Member] | Regulated wholesale, transmission and other [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	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	822	797
Sierra Pacific Power Company [Member] | Regulated Operation [Member] | Fully bundled customer [Member] | Electric Operations [Member] | Regulated retail electric [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	705	696
Sierra Pacific Power Company [Member] | Regulated Operation [Member] | Fully bundled customer [Member] | Regulated Gas [Member] | Regulated retail gas [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	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	344	334
Sierra Pacific Power Company [Member] | Regulated Operation [Member] | Fully bundled customer [Member] | Residential [Member] | Electric Operations [Member] | Regulated retail electric [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	268	267
Sierra Pacific Power Company [Member] | Regulated Operation [Member] | Fully bundled customer [Member] | Residential [Member] | Regulated Gas [Member] | Regulated retail gas [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	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	275	271
Sierra Pacific Power Company [Member] | Regulated Operation [Member] | Fully bundled customer [Member] | Commercial [Member] | Electric Operations [Member] | Regulated retail electric [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	245	246
Sierra Pacific Power Company [Member] | Regulated Operation [Member] | Fully bundled customer [Member] | Commercial [Member] | Regulated Gas [Member] | Regulated retail gas [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	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	196	185
Sierra Pacific Power Company [Member] | Regulated Operation [Member] | Fully bundled customer [Member] | Industrial [Member] | Electric Operations [Member] | Regulated retail electric [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	186	177
Sierra Pacific Power Company [Member] | Regulated Operation [Member] | Fully bundled customer [Member] | Industrial [Member] | Regulated Gas [Member] | Regulated retail gas [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	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	7	7
Sierra Pacific Power Company [Member] | Regulated Operation [Member] | Fully bundled customer [Member] | Other [Member] | Electric Operations [Member] | Regulated retail electric [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	6	6
Sierra Pacific Power Company [Member] | Regulated Operation [Member] | Fully bundled customer [Member] | Other [Member] | Regulated Gas [Member] | Regulated retail gas [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	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
Sierra Pacific Power Company [Member] | Regulated Operation [Member] | Distribution only service [Member] | Electric Operations [Member] | Regulated retail electric [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	4	4
Sierra Pacific Power Company [Member] | Regulated Operation [Member] | Distribution only service [Member] | Regulated Gas [Member] | Regulated retail gas [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	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	826	801
Sierra Pacific Power Company [Member] | Regulated Operation [Member] | Fully bundled and distribution services only customer [Member] | Electric Operations [Member] | Regulated retail electric [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	709	700
Sierra Pacific Power Company [Member] | Regulated Operation [Member] | Fully bundled and distribution services only customer [Member] | Regulated Gas [Member] | Regulated retail gas [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 117	$ 101

Cash and Cash Equivalents and R

Cash and Cash Equivalents and Restricted Cash and Cash Equivalents Supplmental Cash Flow Disclosures (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Condensed Cash Flow Statements, Captions [Line Items]
Cash and cash equivalents	$ 1,040	$ 627
Restricted Cash and Cash Equivalents, Current	212	227
Restricted Cash and Cash Equivalents, Noncurrent	16	29
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	$ 1,268	$ 883	$ 1,283	$ 1,003