Sierra Pacific Power 10-Q 4 Nov 19 2019 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2019	Oct. 31, 2019
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q3
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 Current Reporting Status	Yes
Entity Shell Company	false
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 Current Reporting Status	Yes
Entity Shell Company	false
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 Current Reporting Status	Yes
Entity Shell Company	false
MidAmerican Energy Company [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 Current Reporting Status	Yes
Entity Shell Company	false
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 Current Reporting Status	Yes
Entity Shell Company	false
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 Current Reporting Status	Yes
Entity Shell Company	false

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 1,141	$ 627
Restricted cash and cash equivalents	238	227
Trade receivables, net	2,075	2,038
Inventories	862	844
Mortgage loans held-for-sale	1,060	468
Assets Held-in-trust, Current	304	145
Other current assets	680	798
Total current assets	6,360	5,147
Property, plant and equipment, net	71,324	68,087
Goodwill	9,643	9,595
Regulatory assets	2,817	2,896
Investments and restricted cash and cash equivalents and investments	5,775	4,903
Other assets	1,994	1,561
Total assets	97,913	92,189
Current liabilities:
Accounts payable	1,939	1,809
Accrued interest	504	469
Accrued property, income and other taxes	709	599
Accrued employee expenses	406	275
Short-term debt	3,119	2,516
Current portion of long-term debt	1,976	2,081
Other current liabilities	1,350	1,021
Total current liabilities	10,003	8,770
BHE senior debt	8,230	8,577
BHE junior subordinated debentures	100	100
Subsidiary debt	27,603	25,492
Regulatory liabilities	7,249	7,346
Deferred income taxes	9,195	9,047
Other long-term liabilities	3,793	3,134
Total liabilities	66,173	62,466
Commitments and contingencies
BHE shareholders' equity:
Common stock - 115 shares authorized, no par value, 77 shares issued and outstanding	0	0
Additional paid-in capital	6,355	6,371
Long-term income tax receivable	(457)	(457)
Retained earnings	27,789	25,624
Accumulated other comprehensive loss, net	(2,079)	(1,945)
Total BHE shareholders' equity	31,608	29,593
Noncontrolling interests	132	130
Total equity	31,740	29,723
Total liabilities and equity	$ 97,913	$ 92,189

Consolidated Balance Sheets - P

Consolidated Balance Sheets - PacifiCorp - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 1,141	$ 627
Inventories	862	844
Other current assets	680	798
Total current assets	6,360	5,147
Regulatory assets	2,817	2,896
Other assets	1,994	1,561
Total assets	97,913	92,189
Current liabilities:
Accounts payable	1,939	1,809
Accrued interest	504	469
Accrued property, income and other taxes	709	599
Accrued employee expenses	406	275
Short-term debt	3,119	2,516
Current portion of long-term debt	1,976	2,081
Other current liabilities	1,350	1,021
Total current liabilities	10,003	8,770
Regulatory liabilities	7,249	7,346
Deferred income taxes	9,195	9,047
Other long-term liabilities	3,793	3,134
Total liabilities	66,173	62,466
Equity:
Common stock	0	0
Additional paid-in capital	6,355	6,371
Retained earnings	27,789	25,624
Accumulated other comprehensive loss, net	(2,079)	(1,945)
Total BHE shareholders' equity	31,608	29,593
Total liabilities and equity	97,913	92,189
PacifiCorp [Member]
Current assets:
Cash and cash equivalents	331	77
Trade receivables, net	659	640
Other Receivables, Net, Current	55	92
Inventories	421	417
Other current assets	137	133
Total current assets	1,603	1,359
Property, plant and equipment, net	20,608	19,570
Regulatory assets	1,057	1,076
Other assets	358	308
Total assets	23,626	22,313
Current liabilities:
Accounts payable	732	597
Accrued interest	110	114
Accrued property, income and other taxes	174	75
Accrued employee expenses	122	79
Short-term debt	0	30
Current portion of long-term debt	0	350
Regulatory Liability, Current	63	77
Other current liabilities	172	193
Total current liabilities	1,373	1,515
Long-term debt	7,657	6,665
Regulatory liabilities	2,951	2,978
Deferred income taxes	2,554	2,543
Other long-term liabilities	796	767
Total liabilities	15,331	14,468
Equity:
Preferred Stock, Value, Issued	2	2
Common stock	0	0
Additional paid-in capital	4,479	4,479
Retained earnings	3,826	3,377
Accumulated other comprehensive loss, net	(12)	(13)
Total BHE shareholders' equity	8,295	7,845
Total liabilities and equity	$ 23,626	$ 22,313

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - PacifiCorp - $ / shares shares in Millions	Sep. 30, 2019	Dec. 31, 2018
Common stock, par value	$ 0	$ 0
Common stock, shares authorized	115	115
Common stock, shares issued	77	77
Common stock, shares outstanding	77	77
PacifiCorp [Member]
Common stock, par value	$ 0	$ 0
Common stock, shares authorized	750	750
Common stock, shares issued	357	357
Common stock, shares outstanding	357	357

Balance Sheets - MEC

Balance Sheets - MEC - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 1,141	$ 627
Inventories	862	844
Other current assets	680	798
Total current assets	6,360	5,147
Regulatory assets	2,817	2,896
Investments and restricted cash and cash equivalents and investments	5,775	4,903
Other assets	1,994	1,561
Total assets	97,913	92,189
Current liabilities:
Accounts payable	1,939	1,809
Accrued interest	504	469
Accrued property, income and other taxes	709	599
Short-term debt	3,119	2,516
Current portion of long-term debt	1,976	2,081
Other current liabilities	1,350	1,021
Total current liabilities	10,003	8,770
Deferred income taxes	9,195	9,047
Regulatory liabilities	7,249	7,346
Other long-term liabilities	3,793	3,134
Total liabilities	66,173	62,466
Commitments and contingencies
Equity:
Common stock	0	0
Additional paid-in capital	6,355	6,371
Retained earnings	27,789	25,624
Accumulated other comprehensive loss, net	(2,079)	(1,945)
Total BHE shareholders' equity	31,608	29,593
Total liabilities and equity	97,913	92,189
MidAmerican Energy Company [Member]
Current assets:
Cash and cash equivalents	46	0
Trade receivables, net	352	367
Inventories	201	204
Other current assets	86	90
Total current assets	685	661
Property, plant and equipment, net	17,820	16,157
Regulatory assets	301	273
Investments and restricted cash and cash equivalents and investments	783	708
Other assets	105	121
Total assets	19,694	17,920
Current liabilities:
Accounts payable	611	575
Accrued interest	73	53
Accrued property, income and other taxes	273	300
Short-term debt	0	240
Current portion of long-term debt	0	500
Other current liabilities	148	122
Total current liabilities	1,105	1,790
Long-term debt	6,342	4,879
Deferred income taxes	2,546	2,322
Regulatory liabilities	1,514	1,620
Asset retirement obligations	789	552
Other long-term liabilities	321	311
Total liabilities	12,617	11,474
Commitments and contingencies
Equity:
Common stock	0	0
Additional paid-in capital	561	561
Retained earnings	6,516	5,885
Total BHE shareholders' equity	7,077	6,446
Total liabilities and equity	$ 19,694	$ 17,920

Consolidated Balance Sheets Bal

Consolidated Balance Sheets Balance Sheets (Parenthetical) - MEC - $ / shares shares in Millions	Sep. 30, 2019	Dec. 31, 2018
Common stock, par value	$ 0	$ 0
Common stock, shares authorized	115	115
Common stock, shares issued	77	77
Common stock, shares outstanding	77	77
MidAmerican Energy Company [Member]
Common stock, par value	$ 0	$ 0
Common stock, shares authorized	350	350
Common stock, shares issued	71	71
Common stock, shares outstanding	71	71

Consolidated Balance Sheets - M

Consolidated Balance Sheets - MidAmerican Funding - USD ($) $ in Millions		Sep. 30, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents		$ 1,141	$ 627
Inventories		862	844
Other current assets		680	798
Total current assets		6,360	5,147
Property, plant and equipment, net		71,324	68,087
Goodwill		9,643	9,595
Regulatory assets		2,817	2,896
Investments and restricted cash and cash equivalents and investments		5,775	4,903
Other assets		1,994	1,561
Total assets		97,913	92,189
Current liabilities:
Accounts payable		1,939	1,809
Accrued interest		504	469
Accrued property, income and other taxes		709	599
Short-term debt		3,119	2,516
Current portion of long-term debt		1,976	2,081
Other current liabilities		1,350	1,021
Total current liabilities		10,003	8,770
Deferred income taxes		9,195	9,047
Regulatory liabilities		7,249	7,346
Other long-term liabilities		3,793	3,134
Total liabilities		66,173	62,466
Commitments and contingencies
Equity:
Additional paid-in capital		6,355	6,371
Retained earnings		27,789	25,624
Accumulated other comprehensive loss, net		(2,079)	(1,945)
Total member's equity		31,608	29,593
Total liabilities and equity		97,913	92,189
MidAmerican Funding, LLC and Subsidiaries [Domain]
Current assets:
Cash and cash equivalents		47	1
Trade receivables, net		352	365
Inventories		201	204
Other current assets		87	89
Total current assets		687	659
Property, plant and equipment, net		17,831	16,169
Goodwill		1,270	1,270
Regulatory assets		301	273
Investments and restricted cash and cash equivalents and investments		785	710
Other assets		105	121
Total assets	[1]	20,979	19,202
Current liabilities:
Accounts payable		611	575
Accrued interest		74	58
Accrued property, income and other taxes		273	300
Notes Payable, Related Parties, Current		173	156
Short-term debt		0	240
Current portion of long-term debt		0	500
Other current liabilities		148	122
Total current liabilities		1,279	1,951
Long-term debt		6,582	5,119
Deferred income taxes		2,543	2,319
Regulatory liabilities		1,514	1,620
Asset retirement obligations		789	552
Other long-term liabilities		321	312
Total liabilities		13,028	11,873
Commitments and contingencies
Equity:
Additional paid-in capital		1,679	1,679
Retained earnings		6,272	5,650
Total member's equity		7,951	7,329
Total liabilities and equity		$ 20,979	$ 19,202
[1]	(1)Consists principally of cash and cash equivalents not included in either the regulated electric or regulated natural gas segments.

Consolidated Balance Sheets - N

Consolidated Balance Sheets - NPC - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 1,141	$ 627
Inventories	862	844
Other current assets	680	798
Total current assets	6,360	5,147
Finance Lease, Right-of-Use Asset	503
Regulatory assets	2,817	2,896
Other assets	1,994	1,561
Total assets	97,913	92,189
Current liabilities:
Accounts payable	1,939	1,809
Accrued interest	504	469
Accrued property, income and other taxes	709	599
Current portion of long-term debt	1,976	2,081
Other current liabilities	1,350	1,021
Total current liabilities	10,003	8,770
Regulatory liabilities	7,249	7,346
Deferred income taxes	9,195	9,047
Other long-term liabilities	3,793	3,134
Total liabilities	66,173	62,466
Commitments and contingencies
Equity:
Common stock	0	0
Additional paid-in capital	6,355	6,371
Retained earnings	27,789	25,624
Accumulated other comprehensive loss, net	(2,079)	(1,945)
Total BHE shareholders' equity	31,608	29,593
Total liabilities and equity	97,913	92,189
Nevada Power Company [Member]
Current assets:
Cash and cash equivalents	276	111
Trade receivables, net	343	233
Inventories	60	61
Regulatory assets	1	39
Other current assets	74	75
Total current assets	754	519
Property, plant and equipment, net	6,475	6,418
Finance Lease, Right-of-Use Asset	442	450
Regulatory assets	832	878
Other assets	57	37
Total assets	8,560	8,302
Current liabilities:
Accounts payable	180	187
Accrued interest	39	38
Accrued property, income and other taxes	94	30
Current portion of long-term debt	575	500
Finance Lease, Liability, Current	24	20
Regulatory liabilities	82	49
Customer deposits	71	67
Other current liabilities	63	29
Total current liabilities	1,128	920
Long-term debt	1,775	1,853
Finance Lease, Liability, Noncurrent	430	443
Regulatory liabilities	1,176	1,137
Deferred income taxes	706	749
Other long-term liabilities	296	296
Total liabilities	5,511	5,398
Commitments and contingencies
Equity:
Common stock	0	0
Additional paid-in capital	2,308	2,308
Retained earnings	745	600
Accumulated other comprehensive loss, net	(4)	(4)
Total BHE shareholders' equity	3,049	2,904
Total liabilities and equity	$ 8,560	$ 8,302

Consolidated Balance Sheets (_2

Consolidated Balance Sheets (Parenthetical) - NPC - $ / shares	Sep. 30, 2019	Dec. 31, 2018
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
Nevada Power Company [Member]
Common Stock, Par or 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

Consolidated Balance Sheets - S

Consolidated Balance Sheets - SPPC - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 1,141	$ 627
Inventories	862	844
Other current assets	680	798
Total current assets	6,360	5,147
Regulatory assets	2,817	2,896
Other assets	1,994	1,561
Total assets	97,913	92,189
Current liabilities:
Accounts payable	1,939	1,809
Accrued interest	504	469
Accrued property, income and other taxes	709	599
Other current liabilities	1,350	1,021
Total current liabilities	10,003	8,770
Regulatory liabilities	7,249	7,346
Deferred income taxes	9,195	9,047
Other long-term liabilities	3,793	3,134
Total liabilities	66,173	62,466
Commitments and contingencies
Equity:
Common stock	0	0
Additional paid-in capital	6,355	6,371
Retained earnings	27,789	25,624
Total BHE shareholders' equity	31,608	29,593
Total liabilities and equity	97,913	92,189
Sierra Pacific Power Company [Member]
Current assets:
Cash and cash equivalents	64	71
Trade receivables, net	98	100
Inventories	59	52
Regulatory assets	9	7
Other current assets	30	33
Total current assets	260	263
Property, plant and equipment, net	3,026	2,947
Regulatory assets	307	314
Other assets	75	45
Total assets	3,668	3,569
Current liabilities:
Accounts payable	100	116
Accrued interest	11	13
Accrued property, income and other taxes	28	14
Regulatory liabilities	42	18
Customer deposits	21	18
Other current liabilities	33	18
Total current liabilities	235	197
Long-term debt, carrying value	1,135	1,120
Regulatory liabilities	487	491
Deferred income taxes	334	331
Other long-term liabilities	179	166
Total liabilities	2,370	2,305
Commitments and contingencies
Equity:
Common stock	0	0
Additional paid-in capital	1,111	1,111
Retained earnings	187	153
Total BHE shareholders' equity	1,298	1,264
Total liabilities and equity	$ 3,668	$ 3,569

Consolidated Balance Sheets (_3

Consolidated Balance Sheets (Parenthetical) - SPPC - $ / shares	Sep. 30, 2019	Dec. 31, 2018
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
Sierra Pacific Power Company [Member]
Common Stock, Par or 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

Consolidated Balance Sheets (_4

Consolidated Balance Sheets (Parenthetical) - $ / shares shares in Millions	Sep. 30, 2019	Dec. 31, 2018
BHE shareholders' equity:
Common stock, par value	$ 0	$ 0
Common stock, shares authorized	115	115
Common stock, shares issued	77	77
Common stock, shares outstanding	77	77

Consolidated Statements of Oper

Consolidated Statements of Operations - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Operating revenue:
Total operating revenue	$ 5,644	$ 5,637	$ 15,148	$ 15,070
Cost of sales	1,230	1,271	3,471	3,565
Energy:
Operations and maintenance	845	901	2,469	2,534
Depreciation and amortization	795	667	2,243	2,110
Property and other taxes	130	142	427	428
Real estate	1,194	1,133	3,210	3,067
Total operating expenses	4,194	4,114	11,820	11,704
Operating income	1,450	1,523	3,328	3,366
Other income (expense):
Interest expense	(475)	(453)	(1,428)	(1,380)
Capitalized interest	23	17	56	44
Allowance for equity funds	56	30	126	75
Interest and dividend income	25	27	91	85
(Losses) gains on marketable securities, net	(234)	260	(296)	(336)
Other, net	2	19	67	50
Total other income (expense)	(603)	(100)	(1,384)	(1,462)
Income before income tax benefit and equity income (loss)	847	1,423	1,944	1,904
Income tax (benefit) expense	(302)	23	(526)	(366)
Equity (loss) income	(4)	9	(12)	35
Net income	1,145	1,409	2,458	2,305
Net income attributable to noncontrolling interests	8	8	15	19
Net income attributable to BHE shareholders	1,137	1,401	2,443	2,286
Electricity and natural gas [Member]
Operating revenue:
Total operating revenue	4,337	4,419	11,729	11,818
Residential real estate brokerage and mortgage businesses [Member]
Operating revenue:
Total operating revenue	$ 1,307	$ 1,218	$ 3,419	$ 3,252

Consolidated Statements of Op_2

Consolidated Statements of Operations - PacifiCorp - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Operating revenue	$ 5,644	$ 5,637	$ 15,148	$ 15,070
Cost of sales	1,230	1,271	3,471	3,565
Operating expenses:
Operating income	1,450	1,523	3,328	3,366
Other income (expense):
Interest expense	(475)	(453)	(1,428)	(1,380)
Allowance for borrowed funds	23	17	56	44
Allowance for equity funds	56	30	126	75
Interest and dividend income	25	27	91	85
Other, net	2	19	67	50
Total other income (expense)	(603)	(100)	(1,384)	(1,462)
Income before income tax expense and equity income	847	1,423	1,944	1,904
Income tax (benefit) expense	(302)	23	(526)	(366)
Net income attributable to BHE shareholders	1,137	1,401	2,443	2,286
PacifiCorp [Member]
Operating revenue	1,367	1,369	3,793	3,746
Cost of sales	464	465	1,313	1,300
Operating expenses:
Operations and maintenance	252	266	763	777
Depreciation and amortization	272	203	686	602
Property and other taxes	46	49	146	150
Utilities Operating Expense	1,034	983	2,908	2,829
Operating income	333	386	885	917
Other income (expense):
Interest expense	(101)	(96)	(299)	(288)
Allowance for borrowed funds	11	5	26	13
Allowance for equity funds	21	9	51	24
Interest and dividend income	5	4	17	10
Other, net	6	10	22	26
Total other income (expense)	(58)	(68)	(183)	(215)
Income before income tax expense and equity income	275	318	702	702
Income tax (benefit) expense	(3)	48	77	100
Net income attributable to BHE shareholders	$ 278	$ 270	$ 625	$ 602

Statements of Operations - MEC

Statements of Operations - MEC - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Operating revenue:
Total operating revenue	$ 5,644	$ 5,637	$ 15,148	$ 15,070
Cost of sales	1,230	1,271	3,471	3,565
Operating expenses:
Total operating expenses	4,194	4,114	11,820	11,704
Operating income	1,450	1,523	3,328	3,366
Other income (expense):
Interest expense	(475)	(453)	(1,428)	(1,380)
Capitalized interest	23	17	56	44
Allowance for equity funds	56	30	126	75
Other, net	2	19	67	50
Total other income (expense)	(603)	(100)	(1,384)	(1,462)
Income before income tax (benefit) expense and equity income	847	1,423	1,944	1,904
Income tax (benefit) expense	(302)	23	(526)	(366)
Net Income (Loss) Attributable to Parent	1,137	1,401	2,443	2,286
MidAmerican Energy Company [Member]
Operating revenue:
Total operating revenue	796	832	2,297	2,295
Operating expenses:
Operations and maintenance	189	201	600	598
Depreciation and amortization	184	133	540	499
Property and other taxes	31	30	94	92
Total operating expenses	562	554	1,854	1,851
Operating income	234	278	443	444
Other income (expense):
Interest expense	(68)	(56)	(207)	(170)
Capitalized interest	7	6	20	14
Allowance for equity funds	27	16	59	39
Other, net	4	13	34	34
Total other income (expense)	(30)	(21)	(94)	(83)
Income before income tax (benefit) expense and equity income	204	257	349	361
Income tax (benefit) expense	(78)	(226)	(282)	(334)
Net Income (Loss) Attributable to Parent	282	483	631	695
Regulated electric | MidAmerican Energy Company [Member]
Operating revenue:
Total operating revenue	712	727	1,792	1,785
Cost of sales	113	140	318	366
Regulated natural gas and other | MidAmerican Energy Company [Member]
Operating revenue:
Total operating revenue	84	105	505	510
Cost of sales	$ 45	$ 50	$ 302	$ 296

Consolidated Statements of Op_3

Consolidated Statements of Operations - MidAmerican Funding - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Operating revenue:
Total operating revenue	$ 5,644	$ 5,637	$ 15,148	$ 15,070
Cost of sales	1,230	1,271	3,471	3,565
Operating expenses:
Total operating expenses	4,194	4,114	11,820	11,704
Operating income	1,450	1,523	3,328	3,366
Other income (expense):
Other Interest and Dividend Income	(475)	(453)	(1,428)	(1,380)
Allowance for borrowed funds	23	17	56	44
Allowance for equity funds	56	30	126	75
Other, net	2	19	67	50
Total other income (expense)	(603)	(100)	(1,384)	(1,462)
Income before income tax (benefit) expense and equity income	847	1,423	1,944	1,904
Income tax (benefit) expense	(302)	23	(526)	(366)
Net Income (Loss) Attributable to Parent	1,137	1,401	2,443	2,286
MidAmerican Funding, LLC and Subsidiaries [Domain]
Operating revenue:
Total operating revenue	797	832	2,299	2,297
Operating expenses:
Operations and maintenance	190	201	602	599
Depreciation and amortization	184	133	540	499
Property and other taxes	31	30	94	92
Total operating expenses	563	554	1,855	1,853
Operating income	234	278	444	444
Other income (expense):
Other Interest and Dividend Income	(74)	(61)	(223)	(185)
Allowance for borrowed funds	7	6	20	14
Allowance for equity funds	27	16	59	39
Other, net	5	12	36	35
Total other income (expense)	(35)	(27)	(108)	(97)
Income before income tax (benefit) expense and equity income	199	251	336	347
Income tax (benefit) expense	(80)	(228)	(286)	(338)
Net Income (Loss) Attributable to Parent	279	479	622	685
Regulated electric | MidAmerican Funding, LLC and Subsidiaries [Domain]
Operating revenue:
Total operating revenue	712	727	1,792	1,785
Cost of sales	113	140	318	366
Regulated natural gas and other | MidAmerican Funding, LLC and Subsidiaries [Domain]
Operating revenue:
Total operating revenue	85	105	507	512
Cost of sales	$ 45	$ 50	$ 301	$ 297

Consolidated Statements of Op_4

Consolidated Statements of Operations - NPC - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Operating revenue	$ 5,644	$ 5,637	$ 15,148	$ 15,070
Cost of sales	1,230	1,271	3,471	3,565
Total operating expenses	4,194	4,114	11,820	11,704
Operating income	1,450	1,523	3,328	3,366
Interest expense	(475)	(453)	(1,428)	(1,380)
Capitalized interest	23	17	56	44
Allowance for equity funds	56	30	126	75
Other, net	2	19	67	50
Total other income (expense)	(603)	(100)	(1,384)	(1,462)
Income before income tax expense and equity income	847	1,423	1,944	1,904
Income tax (benefit) expense	(302)	23	(526)	(366)
Net income attributable to BHE shareholders	1,137	1,401	2,443	2,286
Nevada Power Company [Member]
Operating revenue	806	820	1,728	1,777
Cost of sales	353	331	752	740
Operations and maintenance	109	146	263	344
Depreciation and amortization	89	85	267	253
Property and other taxes	11	11	34	31
Total operating expenses	562	573	1,316	1,368
Operating income	244	247	412	409
Interest expense	(41)	(38)	(129)	(128)
Capitalized interest	1	0	2	1
Allowance for equity funds	2	1	4	2
Other, net	4	7	17	16
Total other income (expense)	(34)	(30)	(106)	(109)
Income before income tax expense and equity income	210	217	306	300
Income tax (benefit) expense	45	53	66	72
Net income attributable to BHE shareholders	$ 165	$ 164	$ 240	$ 228

Consolidated Statements of Op_5

Consolidated Statements of Operations - SPPC - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Total operating revenue	$ 5,644	$ 5,637	$ 15,148	$ 15,070
Cost of sales	1,230	1,271	3,471	3,565
Total operating expenses	4,194	4,114	11,820	11,704
Operating income	1,450	1,523	3,328	3,366
Interest expense	(475)	(453)	(1,428)	(1,380)
Capitalized interest	23	17	56	44
Allowance for equity funds	56	30	126	75
Other, net	2	19	67	50
Total other income (expense)	(603)	(100)	(1,384)	(1,462)
Income before income tax expense and equity income	847	1,423	1,944	1,904
Income tax (benefit) expense	(302)	23	(526)	(366)
Net income attributable to BHE shareholders	1,137	1,401	2,443	2,286
Sierra Pacific Power Company [Member]
Total operating revenue	248	239	661	649
Operations and maintenance	46	53	130	140
Depreciation and amortization	31	30	94	89
Property and other taxes	5	6	17	18
Total operating expenses	181	183	530	527
Operating income	67	56	131	122
Interest expense	(12)	(12)	(36)	(33)
Capitalized interest	0	0	1	1
Allowance for equity funds	0	1	2	3
Other, net	1	3	4	8
Total other income (expense)	(11)	(8)	(29)	(21)
Income before income tax expense and equity income	56	48	102	101
Income tax (benefit) expense	12	13	22	25
Net income attributable to BHE shareholders	44	35	80	76
Regulated electric | Sierra Pacific Power Company [Member]
Total operating revenue	232	225	586	575
Cost of sales	93	90	254	245
Regulated natural gas | Sierra Pacific Power Company [Member]
Total operating revenue	16	14	75	74
Cost of sales	$ 6	$ 4	$ 35	$ 35

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Statement of Comprehensive Income [Abstract]
Net income	$ 1,145	$ 1,409	$ 2,458	$ 2,305
Other comprehensive (loss) income, net of tax:
Unrecognized amounts on retirement benefits, net of tax	26	1	40	(50)
Foreign currency translation adjustment	(172)	(2)	(66)	(236)
Unrealized losses on cash flow hedges, net of tax	7	1	(28)	2
Total other comprehensive (loss) income, net of tax	(191)	(2)	(134)	(184)
Comprehensive income	954	1,407	2,324	2,121
Comprehensive income attributable to noncontrolling interests	8	8	15	19
Comprehensive income attributable to BHE shareholders	$ 946	$ 1,399	$ 2,309	$ 2,102

Consolidated Statements of Co_2

Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Consolidated Statements of Comprehensive Income Parenthetical [Abstract]
Unrecognized amounts on retirement benefits, tax	$ (4)	$ 0	$ (6)	$ 12
Unrealized (losses) gains on marketable securities, tax	0	0	0	0
Unrealized (losses) gains on cash flow hedges, tax	$ 3	$ (1)	$ (8)	$ (1)

Consolidated Statements of Chan

Consolidated Statements of Changes in Equity - USD ($) shares in Millions, $ in Millions	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Long-term income tax receivable [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive (Loss) Income, Net [Member]	Noncontrolling Interest [Member]
Balance (shares) at Dec. 31, 2017		77
Balance at Dec. 31, 2017	$ 28,308	$ 0	$ 6,368	$ 0	$ 22,206	$ (398)	$ 132
Increase (Decrease) in Stockholders' Equity [Roll Forward]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification					1,085	(1,085)
Net Income	2,302	0	0		2,286	0	16
Other comprehensive income (loss)	(184)	0	0		0	(184)	0
Reclassification of long-term income tax receivable	(609)			(609)
Long-term income tax receivable adjustments	0			115	(115)
Common stock purchases	(107)	0	(6)		(101)	0	0
Distributions	(17)	0	0		0	0	(17)
Other equity transactions	(5)	$ 0	(5)		0	0	0
Balance (shares) at Sep. 30, 2018		77
Balance at Sep. 30, 2018	29,688	$ 0	6,357	(494)	25,361	(1,667)	131
Balance (shares) at Jun. 30, 2018		77
Balance at Jun. 30, 2018	28,304	$ 0	6,358	(494)	23,976	(1,665)	129
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	1,409	0	0		1,401	0	8
Other comprehensive income (loss)	(2)	0	0		0	(2)	0
Common stock purchases	(17)	0	(1)		(16)	0	0
Distributions	(5)	0	0		0	0	(5)
Other equity transactions	(1)	$ 0	0		0	0	(1)
Balance (shares) at Sep. 30, 2018		77
Balance at Sep. 30, 2018	$ 29,688	$ 0	6,357	(494)	25,361	(1,667)	131
Balance (shares) at Dec. 31, 2018	77	77
Balance at Dec. 31, 2018	$ 29,723	$ 0	6,371	(457)	25,624	(1,945)	130
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	2,457	0	0		2,443	0	14
Other comprehensive income (loss)	(134)	0	0		0	(134)	0
Common stock purchases	(293)	0	(16)		(277)	0	0
Distributions	(16)	0	0		0	0	(16)
Other equity transactions	$ 3	$ 0	0		(1)	0	4
Balance (shares) at Sep. 30, 2019	77	77
Balance at Sep. 30, 2019	$ 31,740	$ 0	6,355	(457)	27,789	(2,079)	132
Balance (shares) at Jun. 30, 2019		77
Balance at Jun. 30, 2019	30,787	$ 0	6,355	(457)	26,651	(1,888)	126
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	1,144	0	0		1,137	0	7
Other comprehensive income (loss)	(191)	0	0		0	(191)	0
Distributions	(6)	0	0		0	0	(6)
Other equity transactions	$ 6	$ 0	0		1	0	5
Balance (shares) at Sep. 30, 2019	77	77
Balance at Sep. 30, 2019	$ 31,740	$ 0	$ 6,355	$ (457)	$ 27,789	$ (2,079)	$ 132

Consolidated Statements of Ch_2

Consolidated Statements of Changes in Equity - PacifiCorp - USD ($) $ in Millions	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive (Loss) Income, Net [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 (Loss) Income, Net [Member]
Stockholders' Equity Attributable to Parent at Dec. 31, 2017						$ 7,555	$ 2	$ 0	$ 4,479	$ 3,089	$ (15)
Net Income (Loss) Attributable to Parent	$ 2,286					602				602
Total other comprehensive (loss) income, net of tax	(184)	$ 0	$ 0	$ 0	$ (184)
Dividends, Common Stock, Cash						(400)				(400)
Stockholders' Equity Attributable to Parent at Sep. 30, 2018						7,757	2	0	4,479	3,291	(15)
Stockholders' Equity Attributable to Parent at Jun. 30, 2018						7,537	2	0	4,479	3,071	(15)
Net Income (Loss) Attributable to Parent	1,401					270				270
Total other comprehensive (loss) income, net of tax	(2)	0	0	0	(2)
Dividends, Common Stock, Cash						(50)				(50)
Stockholders' Equity Attributable to Parent at Sep. 30, 2018						7,757	2	0	4,479	3,291	(15)
Stockholders' Equity Attributable to Parent at Dec. 31, 2018	29,593					7,845	2	0	4,479	3,377	(13)
Net Income (Loss) Attributable to Parent	2,443					625				625
Total other comprehensive (loss) income, net of tax	(134)	0	0	0	(134)	0				(1)	1
Dividends, Common Stock, Cash						(175)				(175)
Stockholders' Equity Attributable to Parent at Sep. 30, 2019	31,608					8,295	2	0	4,479	3,826	(12)
Stockholders' Equity Attributable to Parent at Jun. 30, 2019						8,017	2	0	4,479	3,548	(12)
Net Income (Loss) Attributable to Parent	1,137					278				278
Total other comprehensive (loss) income, net of tax	(191)	$ 0	$ 0	$ 0	$ (191)
Stockholders' Equity Attributable to Parent at Sep. 30, 2019	$ 31,608					$ 8,295	$ 2	$ 0	$ 4,479	$ 3,826	$ (12)

Statements of Changes in Shareh

Statements of Changes in Shareholder's Equity - MEC - USD ($) $ in Millions	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive (Loss) Income, Net [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]
Stockholders' Equity Attributable to Parent at Dec. 31, 2017						$ 5,764	$ 0	$ 561	$ 5,203
Net Income (Loss) Attributable to Parent	$ 2,286					695			695
Other comprehensive income (loss)	(184)	$ 0	$ 0	$ 0	$ (184)
Stockholders' Equity, Other	(5)	0	(5)	0	0
Stockholders' Equity Attributable to Parent at Sep. 30, 2018						6,459	0	561	5,898
Stockholders' Equity Attributable to Parent at Jun. 30, 2018						5,977	0	561	5,416
Net Income (Loss) Attributable to Parent	1,401					483			483
Other comprehensive income (loss)	(2)	0	0	0	(2)
Stockholders' Equity, Other	(1)	0	0	0	0	(1)			(1)
Stockholders' Equity Attributable to Parent at Sep. 30, 2018						6,459	0	561	5,898
Stockholders' Equity Attributable to Parent at Dec. 31, 2018	29,593					6,446	0	561	5,885
Net Income (Loss) Attributable to Parent	2,443					631			631
Other comprehensive income (loss)	(134)	0	0	0	(134)
Stockholders' Equity, Other	3	0	0	(1)	0
Stockholders' Equity Attributable to Parent at Sep. 30, 2019	31,608					7,077	0	561	6,516
Stockholders' Equity Attributable to Parent at Jun. 30, 2019						6,795	0	561	6,234
Net Income (Loss) Attributable to Parent	1,137					282			282
Other comprehensive income (loss)	(191)	0	0	0	(191)
Stockholders' Equity, Other	6	$ 0	$ 0	$ 1	$ 0
Stockholders' Equity Attributable to Parent at Sep. 30, 2019	$ 31,608					$ 7,077	$ 0	$ 561	$ 6,516

Consolidated Statements of Ch_3

Consolidated Statements of Changes in Member's Equity - MidAmerican Funding - USD ($) $ in Millions	Total	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive (Loss) Income, Net [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]
Stockholders' Equity Attributable to Parent at Dec. 31, 2017					$ 6,660	$ 1,679	$ 4,981
Net Income (Loss) Attributable to Parent	$ 2,286				685		685
Other comprehensive income (loss)	(184)	$ 0	$ 0	$ (184)
Stockholders' Equity Attributable to Parent at Sep. 30, 2018					7,345	1,679	5,666
Stockholders' Equity, Other	(5)	(5)	0	0
Stockholders' Equity Attributable to Parent at Jun. 30, 2018					6,866	1,679	5,187
Net Income (Loss) Attributable to Parent	1,401				479		479
Other comprehensive income (loss)	(2)	0	0	(2)
Stockholders' Equity Attributable to Parent at Sep. 30, 2018					7,345	1,679	5,666
Stockholders' Equity, Other	(1)	0	0	0
Stockholders' Equity Attributable to Parent at Dec. 31, 2018	29,593				7,329	1,679	5,650
Net Income (Loss) Attributable to Parent	2,443				622		622
Other comprehensive income (loss)	(134)	0	0	(134)
Stockholders' Equity Attributable to Parent at Sep. 30, 2019	31,608				7,951	1,679	6,272
Stockholders' Equity, Other	3	0	(1)	0
Stockholders' Equity Attributable to Parent at Jun. 30, 2019					7,672	1,679	5,993
Net Income (Loss) Attributable to Parent	1,137				279		279
Other comprehensive income (loss)	(191)	0	0	(191)
Stockholders' Equity Attributable to Parent at Sep. 30, 2019	31,608				$ 7,951	$ 1,679	$ 6,272
Stockholders' Equity, Other	$ 6	$ 0	$ 1	$ 0

Consolidated Statements of Ch_4

Consolidated Statements of Changes in Equity - NPC - USD ($) $ in Millions	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive (Loss) Income, Net [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 (Loss) Income, Net [Member]
Balance (shares) at Dec. 31, 2017		77,000,000					1,000
Stockholders' Equity Attributable to Parent at Dec. 31, 2017						$ 2,678	$ 0	$ 2,308	$ 374	$ (4)
Net Income (Loss) Attributable to Parent	$ 2,286					228			228
Balance (shares) at Sep. 30, 2018		77,000,000					1,000
Stockholders' Equity Attributable to Parent at Sep. 30, 2018						2,905	$ 0	2,308	601	(4)
Stockholders' Equity, Other	(5)	$ 0	$ (5)	$ 0	$ 0	(1)			(1)
Balance (shares) at Jun. 30, 2018		77,000,000					1,000
Stockholders' Equity Attributable to Parent at Jun. 30, 2018						2,742	$ 0	2,308	438	(4)
Net Income (Loss) Attributable to Parent	1,401					164			164
Balance (shares) at Sep. 30, 2018		77,000,000					1,000
Stockholders' Equity Attributable to Parent at Sep. 30, 2018						2,905	$ 0	2,308	601	(4)
Stockholders' Equity, Other	$ (1)	$ 0	0	0	0	$ (1)			(1)	0
Balance (shares) at Dec. 31, 2018	77,000,000	77,000,000				1,000	1,000
Stockholders' Equity Attributable to Parent at Dec. 31, 2018	$ 29,593					$ 2,904	$ 0	2,308	600	(4)
Net Income (Loss) Attributable to Parent	$ 2,443					240			240
Dividends, Common Stock, Cash						$ (95)			(95)
Balance (shares) at Sep. 30, 2019	77,000,000	77,000,000				1,000	1,000
Stockholders' Equity Attributable to Parent at Sep. 30, 2019	$ 31,608					$ 3,049	$ 0	2,308	745	(4)
Stockholders' Equity, Other	3	$ 0	0	(1)	0
Balance (shares) at Jun. 30, 2019		77,000,000					1,000
Stockholders' Equity Attributable to Parent at Jun. 30, 2019						2,884	$ 0	2,308	580	(4)
Net Income (Loss) Attributable to Parent	$ 1,137					$ 165			165
Balance (shares) at Sep. 30, 2019	77,000,000	77,000,000				1,000	1,000
Stockholders' Equity Attributable to Parent at Sep. 30, 2019	$ 31,608					$ 3,049	$ 0	$ 2,308	$ 745	$ (4)
Stockholders' Equity, Other	$ 6	$ 0	$ 0	$ 1	$ 0

Consolidated Statements of Ch_5

Consolidated Statements of Changes in Equity - SPPC - USD ($) $ in Millions	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive (Loss) Income, Net [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 (Loss) Income, Net [Member]
Balance (shares) at Dec. 31, 2017		77,000,000					1,000
Stockholders' Equity Attributable to Parent at Dec. 31, 2017						$ 1,172	$ 0	$ 1,111	$ 62	$ (1)
Net Income (Loss) Attributable to Parent	$ 2,286					76			76
Stockholders' Equity, Other	(5)	$ 0	$ (5)	$ 0	$ 0
Balance (shares) at Sep. 30, 2018		77,000,000					1,000
Stockholders' Equity Attributable to Parent at Sep. 30, 2018						1,248	$ 0	1,111	138	(1)
Balance (shares) at Jun. 30, 2018		77,000,000					1,000
Stockholders' Equity Attributable to Parent at Jun. 30, 2018						1,212	$ 0	1,111	102	(1)
Net Income (Loss) Attributable to Parent	1,401					35			35
Stockholders' Equity, Other	$ (1)	$ 0	0	0	0	1	$ 0	0	1
Balance (shares) at Sep. 30, 2018		77,000,000					1,000
Stockholders' Equity Attributable to Parent at Sep. 30, 2018						$ 1,248	$ 0	1,111	138	(1)
Balance (shares) at Dec. 31, 2018	77,000,000	77,000,000				1,000	1,000
Stockholders' Equity Attributable to Parent at Dec. 31, 2018	$ 29,593					$ 1,264	$ 0	1,111	153	0
Net Income (Loss) Attributable to Parent	2,443					80			80
Dividends, Common Stock, Cash						$ (46)			(46)
Stockholders' Equity, Other	$ 3	$ 0	0	(1)	0
Balance (shares) at Sep. 30, 2019	77,000,000	77,000,000				1,000	1,000
Stockholders' Equity Attributable to Parent at Sep. 30, 2019	$ 31,608					$ 1,298	$ 0	1,111	187	0
Balance (shares) at Jun. 30, 2019		77,000,000					1,000
Stockholders' Equity Attributable to Parent at Jun. 30, 2019						1,254	$ 0	1,111	143	0
Net Income (Loss) Attributable to Parent	1,137					$ 44			44
Stockholders' Equity, Other	$ 6	$ 0	$ 0	$ 1	$ 0
Balance (shares) at Sep. 30, 2019	77,000,000	77,000,000				1,000	1,000
Stockholders' Equity Attributable to Parent at Sep. 30, 2019	$ 31,608					$ 1,298	$ 0	$ 1,111	$ 187	$ 0

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Cash flows from operating activities:
Net income	$ 2,458	$ 2,305
Adjustments to reconcile net income to net cash flows from operating activities:
(Losses) gains on marketable securities, net	(296)	(336)
Depreciation and amortization	2,278	2,147
Allowance for equity funds	(126)	(75)
Equity loss (income), net of distributions	43	17
Changes in regulatory assets and liabilities	108	263
Deferred income taxes and amortization of investment tax credits	(92)	(116)
Other, net	44	40
Changes in other operating assets and liabilities, net of effects from acquisitions:
Trade receivables and other assets	(594)	(192)
Derivative collateral, net	(19)	9
Pension and other postretirement benefit plans	(40)	(61)
Accrued property, income and other taxes, net	195	190
Accounts payable and other liabilities	109	168
Net cash flows from operating activities	4,660	5,031
Cash flows from investing activities:
Capital expenditures	(4,898)	(4,203)
Acquisitions, net of cash acquired	(28)	(105)
Purchases of marketable securities	242	287
Proceeds from sales of marketable securities	223	266
Equity method investments	(1,144)	(236)
Other, net	54	48
Net cash flows from investing activities	(6,035)	(4,517)
Cash flows from financing activities:
Proceeds from BHE senior debt	0	3,166
Repayments of Unsecured Debt	0	(650)
Common stock repurchases	(293)	(107)
Proceeds from subsidiary debt	3,463	2,353
Repayments of subsidiary debt	(1,821)	(2,297)
Net proceeds from (repayments of) short-term debt	594	(2,694)
Business acquisition, acquisition of remaining noncontrolling interest	0	131
Other, net	(42)	(32)
Net cash flows from financing activities	1,901	(392)
Effect of exchange rate changes	(3)	(3)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Start	883	1,283
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, End of Period	1,406	1,402
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect	$ 523	$ 119

Consolidated Statements of Ca_2

Consolidated Statements of Cash Flows - PacifiCorp - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Net Income (Loss) Attributable to Parent	$ 2,443	$ 2,286
Increase (Decrease) in Allowance for Equity Funds Used During Construction	(126)	(75)
Changes in regulatory assets and liabilities	108	263
Deferred income taxes and amortization of investment tax credits	(92)	(116)
Other Noncash Income (Expense)	44	40
Trade receivables and other assets	(594)	(192)
Derivative collateral, net	(19)	9
Accrued property, income and other taxes, net	195	190
Accounts payable and other liabilities	109	168
Net cash flows from operating activities	4,660	5,031
Capital expenditures	(4,898)	(4,203)
Other, net	54	48
Net cash flows from investing activities	(6,035)	(4,517)
Net proceeds from (repayments of) short-term debt	594	(2,694)
Other, net	(42)	(32)
Net cash flows from financing activities	1,901	(392)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect	523	119
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Start	883	1,283
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, End of Period	1,406	1,402
PacifiCorp [Member]
Net Income (Loss) Attributable to Parent	625	602
Depreciation and amortization	686	602
Increase (Decrease) in Allowance for Equity Funds Used During Construction	(51)	(24)
Changes in regulatory assets and liabilities	(31)	127
Deferred income taxes and amortization of investment tax credits	(78)	(53)
Other Noncash Income (Expense)	(3)	(1)
Trade receivables and other assets	21	(21)
Increase (Decrease) in Inventories	(4)	4
Derivative collateral, net	5	4
Accrued property, income and other taxes, net	99	204
Accounts payable and other liabilities	(2)	36
Net cash flows from operating activities	1,267	1,480
Capital expenditures	(1,449)	(713)
Other, net	9	2
Net cash flows from investing activities	(1,440)	(711)
Proceeds from Issuance of Long-term Debt	990	593
Repayments of BHE senior debt and junior subordinated debentures	(350)	(586)
Net proceeds from (repayments of) short-term debt	(30)	(80)
Payments of Ordinary Dividends, Common Stock	(175)	(400)
Other, net	(2)	(2)
Net cash flows from financing activities	433	(475)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect	260	294
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Start	92	29
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, End of Period	$ 352	$ 323

Statements of Cash Flows - MEC

Statements of Cash Flows - MEC - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Net Income (Loss) Attributable to Parent	$ 2,443	$ 2,286
Allowance for equity funds	(126)	(75)
Deferred income taxes and amortization of investment tax credits	(92)	(116)
Other Noncash Income (Expense)	44	40
Increase (Decrease) in Accounts Receivable and Other Operating Assets	594	192
Derivative collateral, net	(19)	9
Pension and other postretirement benefit plans	(40)	(61)
Accrued property, income and other taxes, net	195	190
Accounts payable and other liabilities	109	168
Net cash flows from operating activities	4,660	5,031
Capital expenditures	(4,898)	(4,203)
Purchases of marketable securities	242	287
Proceeds from sales of marketable securities	223	266
Other, net	54	48
Net cash flows from investing activities	(6,035)	(4,517)
Net proceeds from (repayments of) short-term debt	594	(2,694)
Other, net	(42)	(32)
Net cash flows from financing activities	1,901	(392)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect	523	119
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Start	883	1,283
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, End of Period	1,406	1,402
MidAmerican Energy Company [Member]
Net Income (Loss) Attributable to Parent	631	695
Depreciation and amortization	540	499
Amortization of Utility Plant to Other Operating Expense	25	26
Allowance for equity funds	(59)	(39)
Deferred income taxes and amortization of investment tax credits	31	(35)
Other Noncash Income (Expense)	16	13
Increase (Decrease) in Accounts Receivable and Other Operating Assets	1	46
Increase (Decrease) in Inventories	3	40
Pension and other postretirement benefit plans	(9)	(10)
Accrued property, income and other taxes, net	(28)	(77)
Accounts payable and other liabilities	62	(38)
Net cash flows from operating activities	1,211	1,028
Capital expenditures	(1,909)	(1,466)
Purchases of marketable securities	139	224
Proceeds from sales of marketable securities	126	198
Other, net	19	29
Net cash flows from investing activities	(1,903)	(1,463)
Proceeds from Issuance of Long-term Debt	1,460	687
Repayments of BHE senior debt and junior subordinated debentures	(500)	(350)
Net proceeds from (repayments of) short-term debt	(240)	0
Other, net	0	(1)
Net cash flows from financing activities	720	336
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect	28	(99)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Start	56	282
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, End of Period	$ 84	$ 183

Consolidated Statements of Ca_3

Consolidated Statements of Cash Flows - MidAmerican Funding - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Net Income (Loss) Attributable to Parent	$ 2,443	$ 2,286
Allowance for equity funds	(126)	(75)
Deferred income taxes and amortization of investment tax credits	(92)	(116)
Other Noncash Income (Expense)	44	40
Increase (Decrease) in Accounts Receivable and Other Operating Assets	594	192
Derivative collateral, net	(19)	9
Pension and other postretirement benefit plans	(40)	(61)
Accrued property, income and other taxes, net	195	190
Accounts payable and other liabilities	109	168
Net cash flows from operating activities	4,660	5,031
Capital expenditures	(4,898)	(4,203)
Purchases of marketable securities	(242)	(287)
Proceeds from sales of marketable securities	223	266
Other, net	54	48
Net cash flows from investing activities	(6,035)	(4,517)
Net proceeds from (repayments of) short-term debt	594	(2,694)
Other, net	(42)	(32)
Net cash flows from financing activities	1,901	(392)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect	523	119
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Start	883	1,283
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, End of Period	1,406	1,402
MidAmerican Funding, LLC and Subsidiaries [Domain]
Net Income (Loss) Attributable to Parent	622	685
Depreciation and amortization	540	499
Amortization of Utility Plant to Other Operating Expense	25	26
Allowance for equity funds	(59)	(39)
Deferred income taxes and amortization of investment tax credits	30	(35)
Other Noncash Income (Expense)	18	17
Increase (Decrease) in Accounts Receivable and Other Operating Assets	6	42
Increase (Decrease) in Inventories	3	40
Pension and other postretirement benefit plans	(9)	(10)
Accrued property, income and other taxes, net	(28)	(65)
Accounts payable and other liabilities	58	(41)
Net cash flows from operating activities	1,194	1,035
Capital expenditures	(1,909)	(1,466)
Purchases of marketable securities	(139)	(224)
Proceeds from sales of marketable securities	126	198
Other, net	19	29
Net cash flows from investing activities	(1,903)	(1,463)
Proceeds from Issuance of Long-term Debt	1,460	687
Repayments of BHE senior debt and junior subordinated debentures	(500)	(350)
Increase (Decrease) in Notes Payable, Related Parties, Current	17	(6)
Net proceeds from (repayments of) short-term debt	(240)	0
Other, net	0	(2)
Net cash flows from financing activities	737	329
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect	28	(99)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Start	57	282
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, End of Period	$ 85	$ 183

Consolidated Statements of Ca_4

Consolidated Statements of Cash Flows - NPC - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Net Income (Loss) Attributable to Parent	$ 2,443	$ 2,286
Allowance for equity funds	(126)	(75)
Changes in regulatory assets and liabilities	108	263
Deferred income taxes and amortization of investment tax credits	(92)	(116)
Other Noncash Income (Expense)	44	40
Trade receivables and other assets	(594)	(192)
Accrued property, income and other taxes, net	195	190
Accounts payable and other liabilities	109	168
Net cash flows from operating activities	4,660	5,031
Capital expenditures	(4,898)	(4,203)
Net cash flows from investing activities	(6,035)	(4,517)
Other, net	(42)	(32)
Net cash flows from financing activities	1,901	(392)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect	523	119
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Start	883	1,283
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, End of Period	1,406	1,402
Nevada Power Company [Member]
Net Income (Loss) Attributable to Parent	240	228
Depreciation and amortization	267	253
Allowance for equity funds	(4)	(2)
Changes in regulatory assets and liabilities	62	75
Deferred income taxes and amortization of investment tax credits	(42)	(7)
Deferred Energy Change	39	12
Amortization of Deferred Charges	37	13
Other Noncash Income (Expense)	(4)	8
Trade receivables and other assets	(110)	(138)
Increase (Decrease) in Inventories	2	1
Accrued property, income and other taxes, net	53	54
Accounts payable and other liabilities	15	(11)
Net cash flows from operating activities	555	486
Capital expenditures	(283)	(203)
Proceeds from Sale of Other Assets, Investing Activities	2	1
Net cash flows from investing activities	(281)	(202)
Proceeds from Issuance of Long-term Debt	495	573
Repayments of BHE senior debt and junior subordinated debentures	(500)	(824)
Payments of Ordinary Dividends, Common Stock	(95)	0
Other, net	(11)	(12)
Net cash flows from financing activities	(111)	(263)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect	163	21
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Start	121	66
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, End of Period	$ 284	$ 87

Consolidated Statements of Ca_5

Consolidated Statements of Cash Flows - SPPC - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Net Income (Loss) Attributable to Parent	$ 2,443	$ 2,286
Allowance for equity funds	(126)	(75)
Changes in regulatory assets and liabilities	108	263
Deferred income taxes and amortization of investment tax credits	(92)	(116)
Other Noncash Income (Expense)	(44)	(40)
Trade receivables and other assets	(594)	(192)
Accrued property, income and other taxes, net	195	190
Accounts payable and other liabilities	109	168
Net cash flows from operating activities	4,660	5,031
Capital expenditures	(4,898)	(4,203)
Net cash flows from investing activities	(6,035)	(4,517)
Other, net	(42)	(32)
Net cash flows from financing activities	1,901	(392)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect	523	119
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Start	883	1,283
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, End of Period	1,406	1,402
Sierra Pacific Power Company [Member]
Net Income (Loss) Attributable to Parent	80	76
Depreciation and amortization	94	89
Allowance for equity funds	(2)	(3)
Changes in regulatory assets and liabilities	30	32
Deferred income taxes and amortization of investment tax credits	(5)	9
Deferred Energy Change	7	26
Amortization of Deferred Charges	(5)	(6)
Other Noncash Income (Expense)	3	0
Trade receivables and other assets	(3)	(3)
Increase (Decrease) in Inventories	7	5
Accrued property, income and other taxes, net	10	(2)
Accounts payable and other liabilities	(7)	(5)
Net cash flows from operating activities	189	208
Capital expenditures	(165)	(139)
Proceeds from Sale of Other Property, Plant, and Equipment	1	0
Net cash flows from investing activities	(164)	(139)
Proceeds from Issuance of Long-term Debt	125	0
Repayments of Long-term Debt	109	0
Payments of Ordinary Dividends, Common Stock	46	0
Other, net	(3)	(2)
Net cash flows from financing activities	(33)	(2)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect	(8)	67
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Start	76	8
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, End of Period	$ 68	$ 75

General

General	9 Months Ended
	Sep. 30, 2019
Segment Reporting Information [Line Items]
General/Organization and Operations	General 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 (which primarily consists of BHE Renewables, LLC and CalEnergy Philippines ) 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. The unaudited Consolidated Financial Statements have been prepared in accordance with accounting principles generally accepted in the United States of America ("GAAP") for interim financial information and the United States Securities and Exchange Commission's rules and regulations for Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the disclosures required by GAAP for annual financial statements. Management believes the unaudited Consolidated Financial Statements contain all adjustments (consisting only of normal recurring adjustments) considered necessary for the fair presentation of the unaudited Consolidated Financial Statements as of September 30, 2019 and for the three- and nine-month periods ended September 30, 2019 and 2018 . The results of operations for the three- and nine-month periods ended September 30, 2019 are not necessarily indicative of the results to be expected for the full year. The preparation of the unaudited Consolidated Financial Statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities at the date of the unaudited Consolidated Financial Statements and the reported amounts of revenue and expenses during the period. Actual results may differ from the estimates used in preparing the unaudited Consolidated Financial Statements. Note 2 of Notes to Consolidated Financial Statements included in the Company's Annual Report on Form 10-K for the year ended December 31, 2018 describes the most significant accounting policies used in the preparation of the unaudited Consolidated Financial Statements. There have been no significant changes in the Company's assumptions regarding significant accounting estimates and policies, except as disclosed in Note 4 , during the nine-month period ended September 30, 2019 .
PacifiCorp [Member]
Segment Reporting Information [Line Items]
General/Organization and Operations	General 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 "). The unaudited Consolidated Financial Statements have been prepared in accordance with accounting principles generally accepted in the United States of America ("GAAP") for interim financial information and the United States Securities and Exchange Commission's rules and regulations for Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the disclosures required by GAAP for annual financial statements. Management believes the unaudited Consolidated Financial Statements contain all adjustments (consisting only of normal recurring adjustments) considered necessary for the fair presentation of the unaudited Consolidated Financial Statements as of September 30, 2019 and for the three- and nine-month periods ended September 30, 2019 and 2018 . The Consolidated Statements of Comprehensive Income have been omitted as net income materially equals comprehensive income for the three- and nine-month periods ended September 30, 2019 and 2018 . The results of operations for the three- and nine-month periods ended September 30, 2019 and 2018 are not necessarily indicative of the results to be expected for the full year. The preparation of the unaudited Consolidated Financial Statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities at the date of the unaudited Consolidated Financial Statements and the reported amounts of revenue and expenses during the period. Actual results may differ from the estimates used in preparing the unaudited Consolidated Financial Statements. Note 2 of Notes to Consolidated Financial Statements included in PacifiCorp's Annual Report on Form 10-K for the year ended December 31, 2018 describes the most significant accounting policies used in the preparation of the unaudited Consolidated Financial Statements. There have been no significant changes in PacifiCorp's assumptions regarding significant accounting estimates and policies, except as disclosed in Note 4 , during the nine-month period ended September 30, 2019 .
MidAmerican Energy Company [Member]
Segment Reporting Information [Line Items]
General/Organization and Operations	General 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 subsidiaries include Midwest Capital Group, Inc. and MEC Construction Services Co. 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 "). The unaudited Financial Statements have been prepared in accordance with accounting principles generally accepted in the United States of America ("GAAP") for interim financial information and the United States Securities and Exchange Commission's rules and regulations for Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the disclosures required by GAAP for annual financial statements. Management believes the unaudited Financial Statements contain all adjustments (consisting only of normal recurring adjustments) considered necessary for the fair presentation of the unaudited Financial Statements as of September 30, 2019 , and for the three- and nine-month periods ended September 30, 2019 and 2018 . The Statements of Comprehensive Income have been omitted as net income equals comprehensive income for the three- and nine-month periods ended September 30, 2019 and 2018 . The results of operations for the three- and nine-month periods ended September 30, 2019 , are not necessarily indicative of the results to be expected for the full year. The preparation of the unaudited Financial Statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities at the date of the unaudited Financial Statements and the reported amounts of revenue and expenses during the period. Actual results may differ from the estimates used in preparing the unaudited Financial Statements. Note 2 of Notes to Financial Statements included in MidAmerican Energy's Annual Report on Form 10-K for the year ended December 31, 2018 , describes the most significant accounting policies used in the preparation of the unaudited Financial Statements. There have been no significant changes in MidAmerican Energy's assumptions regarding significant accounting estimates and policies during the nine-month period ended September 30, 2019 .
MidAmerican Funding, LLC and Subsidiaries [Domain]
Segment Reporting Information [Line Items]
General/Organization and Operations	General 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. Direct, wholly owned nonregulated subsidiaries of MHC are Midwest Capital Group, Inc. and MEC Construction Services Co. The unaudited Consolidated Financial Statements have been prepared in accordance with accounting principles generally accepted in the United States of America ("GAAP") for interim financial information and the United States Securities and Exchange Commission's rules and regulations for Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the disclosures required by GAAP for annual financial statements. Management believes the unaudited Consolidated Financial Statements contain all adjustments (consisting only of normal recurring adjustments) considered necessary for the fair presentation of the unaudited Consolidated Financial Statements as of September 30, 2019 , and for the three- and nine-month periods ended September 30, 2019 and 2018 . The Consolidated Statements of Comprehensive Income have been omitted as net income materially equals comprehensive income for the three- and nine-month periods ended September 30, 2019 and 2018 . The results of operations for the three- and nine-month periods ended September 30, 2019 , are not necessarily indicative of the results to be expected for the full year. The preparation of the unaudited Consolidated Financial Statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities at the date of the unaudited Consolidated Financial Statements and the reported amounts of revenue and expenses during the period. Actual results may differ from the estimates used in preparing the unaudited Consolidated Financial Statements. Note 2 of Notes to Consolidated Financial Statements included in MidAmerican Funding 's Annual Report on Form 10-K for the year ended December 31, 2018 , describes the most significant accounting policies used in the preparation of the unaudited Consolidated Financial Statements. There have been no significant changes in MidAmerican Funding 's assumptions regarding significant accounting estimates and policies during the nine-month period ended September 30, 2019 .
Nevada Power Company [Member]
Segment Reporting Information [Line Items]
General/Organization and Operations	General 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 the 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 "). The unaudited Consolidated Financial Statements have been prepared in accordance with accounting principles generally accepted in the United States of America ("GAAP") for interim financial information and the United States Securities and Exchange Commission's rules and regulations for Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the disclosures required by GAAP for annual financial statements. Management believes the unaudited Consolidated Financial Statements contain all adjustments (consisting only of normal recurring adjustments) considered necessary for the fair presentation of the unaudited Consolidated Financial Statements as of September 30, 2019 and for the three- and nine-month periods ended September 30, 2019 and 2018 . The Consolidated Statements of Comprehensive Income have been omitted as net income equals comprehensive income for the three- and nine-month periods ended September 30, 2019 and 2018 . The results of operations for the three- and nine-month periods ended September 30, 2019 are not necessarily indicative of the results to be expected for the full year. The preparation of the unaudited Consolidated Financial Statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities at the date of the unaudited Consolidated Financial Statements and the reported amounts of revenue and expenses during the period. Actual results may differ from the estimates used in preparing the unaudited Consolidated Financial Statements. Note 2 of Notes to Consolidated Financial Statements included in Nevada Power's Annual Report on Form 10-K for the year ended December 31, 2018 describes the most significant accounting policies used in the preparation of the unaudited Consolidated Financial Statements. There have been no significant changes in Nevada Power's assumptions regarding significant accounting estimates and policies, except as disclosed in Note 4 , during the nine-month period ended September 30, 2019 .
Sierra Pacific Power Company [Member]
Segment Reporting Information [Line Items]
General/Organization and Operations	General 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 "). The unaudited Financial Statements have been prepared in accordance with accounting principles generally accepted in the United States of America ("GAAP") for interim financial information and the United States Securities and Exchange Commission's rules and regulations for Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the disclosures required by GAAP for annual financial statements. Management believes the unaudited Financial Statements contain all adjustments (consisting only of normal recurring adjustments) considered necessary for the fair presentation of the unaudited Financial Statements as of September 30, 2019 and for the three- and nine-month periods ended September 30, 2019 and 2018 . The Statements of Comprehensive Income have been omitted as net income equals comprehensive income for the three- and nine-month periods ended September 30, 2019 and 2018 . The results of operations for the three- and nine-month periods ended September 30, 2019 are not necessarily indicative of the results to be expected for the full year. The preparation of the unaudited Financial Statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities at the date of the unaudited Financial Statements and the reported amounts of revenue and expenses during the period. Actual results may differ from the estimates used in preparing the unaudited Financial Statements. Note 2 of Notes to Financial Statements included in Sierra Pacific's Annual Report on Form 10-K for the year ended December 31, 2018 describes the most significant accounting policies used in the preparation of the unaudited Financial Statements. There have been no significant changes in Sierra Pacific's assumptions regarding significant accounting estimates and policies, except as disclosed in Note 4 , during the nine-month period ended September 30, 2019 .

New Accounting Pronouncements

New Accounting Pronouncements	9 Months Ended
	Sep. 30, 2019
MidAmerican Energy Company [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Leases of Lessee Disclosure [Text Block]	Leases In February 2016, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") No. 2016-02, which created 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 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]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Leases of Lessee Disclosure [Text Block]	Leases Refer to Note 4 of MidAmerican Energy's Notes to Financial Statements.

Investments and Restricted Cash

Investments and Restricted Cash and Investments	9 Months Ended
	Sep. 30, 2019
Restricted Cash and Cash Equivalents Items [Line Items]
Investments and Restricted Cash and Investments	Investments and Restricted Cash and Cash Equivalents and Investments Investments and restricted cash and cash equivalents and investments consists of the following (in millions): As of September 30, December 31, 2019 2018 Investments: BYD Company Limited common stock $ 1,124 $ 1,435 Rabbi trusts 395 371 Other 181 168 Total investments 1,700 1,974 Equity method investments: BHE Renewables tax equity investments 2,695 1,661 Electric Transmission Texas, LLC 553 527 Bridger Coal Company 83 99 Other 173 153 Total equity method investments 3,504 2,440 Restricted cash and cash equivalents and investments: Quad Cities Station nuclear decommissioning trust funds 571 504 Restricted cash and cash equivalents 265 256 Total restricted cash and cash equivalents and investments 836 760 Total investments and restricted cash and cash equivalents and investments $ 6,040 $ 5,174 Reflected as: Current assets $ 265 $ 271 Noncurrent assets 5,775 4,903 Total investments and restricted cash and cash equivalents and investments $ 6,040 $ 5,174 Investments (Losses) gains on marketable securities, net recognized during the period consists of the following (in millions): Three-Month Periods Nine-Month Periods Ended September 30, Ended September 30, 2019 2018 2019 2018 Unrealized (losses) gains recognized on marketable securities still held at the reporting date $ (236 ) $ 260 $ (297 ) $ (337 ) Net gains recognized on marketable securities sold during the period 2 — 1 1 (Losses) gains on marketable securities, net $ (234 ) $ 260 $ (296 ) $ (336 ) 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 September 30, 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 September 30, 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 September 30, December 31, 2019 2018 Cash and cash equivalents $ 1,141 $ 627 Restricted cash and cash equivalents 238 227 Investments and restricted cash and cash equivalents and investments 27 29 Total cash and cash equivalents and restricted cash and cash equivalents $ 1,406 $ 883

Property, Plant and Equipment,

Property, Plant and Equipment, Net	9 Months Ended
	Sep. 30, 2019
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Net	Property, Plant and Equipment, Net Property, plant and equipment, net consists of the following (in millions): As of Depreciable September 30, December 31, Life 2019 2018 Regulated assets: Utility generation, transmission and distribution systems 5-80 years $ 78,596 $ 76,707 Interstate natural gas pipeline assets 3-80 years 7,637 7,524 86,233 84,231 Accumulated depreciation and amortization (26,719 ) (25,894 ) Regulated assets, net 59,514 58,337 Nonregulated assets: Independent power plants 5-30 years 6,966 6,826 Other assets 3-30 years 1,606 1,424 8,572 8,250 Accumulated depreciation and amortization (2,075 ) (1,610 ) Nonregulated assets, net 6,497 6,640 Net operating assets 66,011 64,977 Construction work-in-progress 5,313 3,110 Property, plant and equipment, net $ 71,324 $ 68,087 Construction work-in-progress includes $5.1 billion as of September 30, 2019 and $2.9 billion as of December 31, 2018 , related to the construction of regulated assets.
MidAmerican Funding, LLC and Subsidiaries [Domain]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Net	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 as of September 30, 2019 and December 31, 2018 , nonregulated property gross of $24 million and related accumulated depreciation and amortization of $13 million and $12 million , respectively, which consisted primarily of a corporate aircraft owned by MHC.
MidAmerican Energy Company [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Net	Property, Plant and Equipment, Net Property, plant and equipment, net consists of the following (in millions): As of September 30, December 31, Depreciable Life 2019 2018 Utility plant in service, net: Generation 20-70 years $ 14,492 $ 13,727 Transmission 52-75 years 2,012 1,934 Electric distribution 20-75 years 3,842 3,672 Natural gas distribution 29-75 years 1,776 1,724 Utility plant in service 22,122 21,057 Accumulated depreciation and amortization (6,347 ) (5,941 ) Utility plant in service, net 15,775 15,116 Nonregulated property, net: Nonregulated property gross 20-50 years 7 7 Accumulated depreciation and amortization (1 ) (1 ) Nonregulated property, net 6 6 15,781 15,122 Construction work-in-progress 2,039 1,035 Property, plant and equipment, net $ 17,820 $ 16,157
PacifiCorp [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Net	Property, Plant and Equipment, Net Property, plant and equipment, net consists of the following (in millions): As of September 30, December 31, Depreciable Life 2019 2018 Utility Plant: Generation 14 - 67 years $ 12,574 $ 12,606 Transmission 58 - 75 years 6,468 6,357 Distribution 20 - 70 years 7,217 7,030 Intangible plant (1) 5 - 75 years 1,002 970 Other 5 - 60 years 1,429 1,436 Utility plant in service 28,690 28,399 Accumulated depreciation and amortization (10,069 ) (10,034 ) Utility plant in-service, net 18,621 18,365 Other non-regulated, net of accumulated depreciation and amortization 47 years 10 10 Plant, net 18,631 18,375 Construction work-in-progress 1,977 1,195 Property, plant and equipment, net $ 20,608 $ 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]
Property, Plant and Equipment, Net	Property, Plant and Equipment, Net Property, plant and equipment, net consists of the following (in millions): As of Depreciable Life September 30, December 31, 2019 2018 Utility plant: Generation 30 - 55 years $ 3,730 $ 3,720 Distribution 20 - 65 years 3,503 3,411 Transmission 45 - 70 years 1,453 1,439 General and intangible plant 5 - 65 years 718 716 Utility plant 9,404 9,286 Accumulated depreciation and amortization (3,096 ) (2,966 ) Utility plant, net 6,308 6,320 Other non-regulated, net of accumulated depreciation and amortization 45 years 1 1 Plant, net 6,309 6,321 Construction work-in-progress 166 97 Property, plant and equipment, net $ 6,475 $ 6,418
Sierra Pacific Power Company [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Net	Property, Plant and Equipment, Net Property, plant and equipment, net consists of the following (in millions): As of Depreciable Life September 30, December 31, 2019 2018 Utility plant: Electric generation 25 - 60 years $ 1,133 $ 1,132 Electric distribution 20 - 100 years 1,657 1,568 Electric transmission 50 - 100 years 831 812 Electric general and intangible plant 5 - 70 years 175 185 Natural gas distribution 35 - 70 years 415 403 Natural gas general and intangible plant 5 - 70 years 14 14 Common general 5 - 70 years 322 321 Utility plant 4,547 4,435 Accumulated depreciation and amortization (1,624 ) (1,583 ) Utility plant, net 2,923 2,852 Other non-regulated, net of accumulated depreciation and amortization 70 years 4 5 Plant, net 2,927 2,857 Construction work-in-progress 99 90 Property, plant and equipment, net $ 3,026 $ 2,947

Regulatory Matters

Regulatory Matters	9 Months Ended
	Sep. 30, 2019
Nevada Power Company [Member]
Schedule Of Regulatory Assets and Liabilities [Line Items]
Regulatory Matters	Regulatory Matters 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. 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. These excess amounts are reflected in quarterly adjustments to rates and recorded as cost of fuel and energy in future time periods. 2017 Tax Reform In February 2018, Nevada Power made a filing 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. Oral arguments on the petition have been scheduled for January 2020. Chapter 704B Applications Chapter 704B of the Nevada Revised Statutes allows retail electric customers with an average annual load of one megawatt (" MW ") or more to file with the PUCN an application to purchase energy from alternative providers of a new electric resource and become distribution only service customers. On a case-by-case basis, the PUCN will assess the application and may deny or grant the application subject to conditions, including paying an impact fee, paying on-going charges and receiving approval for specific alternative energy providers and terms. The impact fee and on-going charges are assessed to alleviate the burden on other Nevada customers for the applicant's share of previously committed investments and long-term renewable contracts and are set at a level designed such that the remaining customers are not subjected to increased costs. In June 2019, the Nevada Legislature passed Senate Bill 547 ("SB 547") which modifies the 704B process. The modifications outlined in SB 547, among others, require a utility to establish limits in their integrated resource plan on the amount of load that can take service under Chapter 704B, customers taking service under Chapter 704B continue to pay for public program costs and requires the alternative energy providers to be licensed by the PUCN. In addition, SB 547 requires customers to file a 704B application with the PUCN in January allowing for alignment with the capacity amount established in the integrated resource plan. In June 2018, Station Casinos LLC ("Station"), a customer of Nevada Power, filed an application with the PUCN to purchase energy from an alternative provider and become a distribution only service customer of Nevada Power. In October 2018, the PUCN approved an order allowing Station to purchase energy from another energy supplier subject to conditions, including paying an impact fee of $15 million . In November 2018, Station filed a petition for reconsideration with the PUCN to allow Station to pay its share of the Renewable Base Tariff Energy Rate in a single lump sum, receive a credit for a portion of impact fees previously paid by past 704B applicants and receive a credit for a portion of incremental transmission revenue associated with expected sales to others. In December 2018, the PUCN issued an order granting reconsideration and reaffirming the October 2018 order. In February 2019, the PUCN issued an order allowing Station to alter their expected transition date from December 1, 2018 to October 1, 2019. In June 2019, Station withdrew their application. In November 2018, Boyd Gaming Corporation ("Boyd"), a customer of Nevada Power, filed an application with the PUCN to purchase energy from an alternative provider and become a distribution only service customer of Nevada Power. In June 2019, the PUCN approved an order allowing Boyd to purchase energy from another energy supplier subject to conditions, including paying an impact fee of $11 million . In September 2019, Boyd withdrew their application.
Sierra Pacific Power Company [Member]
Schedule Of Regulatory Assets and Liabilities [Line Items]
Regulatory Matters	Regulatory Matters 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. 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. These excess amounts are reflected in quarterly adjustments to rates and recorded as cost of fuel and energy in future time periods. 2017 Tax Reform In February 2018, Sierra Pacific made a filing 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. Oral arguments on the petition have been scheduled for January 2020. Chapter 704B Applications Chapter 704B of the Nevada Revised Statutes allows retail electric customers with an average annual load of one megawatt (" MW ") or more to file with the PUCN an application to purchase energy from alternative providers of a new electric resource and become distribution only service customers. On a case-by-case basis, the PUCN will assess the application and may deny or grant the application subject to conditions, including paying an impact fee, paying on-going charges and receiving approval for specific alternative energy providers and terms. The impact fee and on-going charges are assessed to alleviate the burden on other Nevada customers for the applicant's share of previously committed investments and long-term renewable contracts and are set at a level designed such that the remaining customers are not subjected to increased costs. In June 2019, the Nevada Legislature passed Senate Bill 547 ("SB 547") which modifies the 704B process. The modifications outlined in SB 547, among others, require a utility to establish limits in their integrated resource plan on the amount of load that can take service under Chapter 704B, customers taking service under Chapter 704B continue to pay for public program costs and requires the alternative energy providers to be licensed by the PUCN. In addition, SB 547 requires customers to file a 704B application with the PUCN in January allowing for alignment with the capacity amount established in the integrated resource plan.

Cash and Cash Equivalents and R

Cash and Cash Equivalents and Restricted Cash and Cash Equivalents Supplemental Cash Flow Disclosures (Notes)	9 Months Ended
	Sep. 30, 2019
Sierra Pacific Power Company [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Cash Flow, Supplemental Disclosures [Text Block]	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 September 30, 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 September 30, 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 September 30, December 31, 2019 2018 Cash and cash equivalents $ 64 $ 71 Restricted cash and cash equivalents included in other current assets 4 5 Total cash and cash equivalents and restricted cash and cash equivalents $ 68 $ 76
Nevada Power Company [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Cash Flow, Supplemental Disclosures [Text Block]	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 September 30, 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 September 30, 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 September 30, December 31, 2019 2018 Cash and cash equivalents $ 276 $ 111 Restricted cash and cash equivalents included in other current assets 8 10 Total cash and cash equivalents and restricted cash and cash equivalents $ 284 $ 121 Subsequent Event In October 2019, Nevada Power declared and paid a dividend to NV Energy, Inc. of $200 million .
PacifiCorp [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Cash Flow, Supplemental Disclosures [Text Block]	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 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. A reconciliation of cash and cash equivalents and restricted cash and cash equivalents as of September 30, 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 September 30, December 31, 2019 2018 Cash and cash equivalents $ 331 $ 77 Restricted cash included in other current assets 19 13 Restricted cash included in other assets 2 2 Total cash and cash equivalents and restricted cash and cash equivalents $ 352 $ 92
MidAmerican Funding, LLC and Subsidiaries [Domain]
Condensed Cash Flow Statements, Captions [Line Items]
Cash Flow, Supplemental Disclosures [Text Block]	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 September 30, 2019 and December 31, 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 September 30, 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 September 30 December 31 2019 2018 Cash and cash equivalents $ 47 $ 1 Restricted cash and cash equivalents in other current assets 38 56 Total cash and cash equivalents and restricted cash and cash equivalents $ 85 $ 57
MidAmerican Energy Company [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Cash Flow, Supplemental Disclosures [Text Block]	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 September 30, 2019 and December 31, 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 September 30, 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 September 30, December 31 2019 2018 Cash and cash equivalents $ 46 $ — Restricted cash and cash equivalents in other current assets 38 56 Total cash and cash equivalents and restricted cash and cash equivalents $ 84 $ 56

Leases Leases (Notes)

Leases Leases (Notes)	9 Months Ended
	Sep. 30, 2019
Lessee, Lease, Description [Line Items]
Lessee, Finance Leases [Text Block]	Leases Adoption 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 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. 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. Leases Lessee 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. The following table summarizes the Company's leases recorded on the Consolidated Balance Sheet (in millions): As of September 30, 2019 Right-of-use assets: Operating leases $ 526 Finance leases 503 Total right-of-use assets $ 1,029 Lease liabilities: Operating leases $ 574 Finance leases 517 Total lease liabilities $ 1,091 The following table summarizes the Company's lease costs (in millions): Three-Month Period Nine-Month Period Ended September 30, Ended September 30, 2019 2019 Variable $ 156 $ 453 Operating 43 127 Finance: Amortization 4 12 Interest 10 31 Short-term 2 6 Total lease costs $ 215 $ 629 Weighted-average remaining lease term (years): Operating leases 7.8 Finance leases 29.3 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): Nine-Month Period Ended September 30, 2019 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ (106 ) Operating cash flows from finance leases (32 ) Financing cash flows from finance leases (14 ) Right-of-use assets obtained in exchange for lease liabilities: Operating leases $ 49 Finance leases 12 The Company has the following remaining lease commitments as of (in millions): September 30, 2019 December 31, 2018 (1) Operating Finance Total Operating Capital Total 2019 $ 38 $ 16 $ 54 $ 147 $ 69 $ 216 2020 139 70 209 128 68 196 2021 118 76 194 110 73 183 2022 96 69 165 87 67 154 2023 68 58 126 61 56 117 Thereafter 241 779 1,020 159 772 931 Total undiscounted lease payments 700 1,068 1,768 $ 692 $ 1,105 $ 1,797 Less - amounts representing interest (126 ) (551 ) (677 ) Lease liabilities $ 574 $ 517 $ 1,091 (1) Amounts included for comparability and accounted for in accordance with ASC 840, "Leases".
Lessee, Operating Leases [Text Block]	Leases Adoption 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 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. 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. Leases Lessee 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. The following table summarizes the Company's leases recorded on the Consolidated Balance Sheet (in millions): As of September 30, 2019 Right-of-use assets: Operating leases $ 526 Finance leases 503 Total right-of-use assets $ 1,029 Lease liabilities: Operating leases $ 574 Finance leases 517 Total lease liabilities $ 1,091 The following table summarizes the Company's lease costs (in millions): Three-Month Period Nine-Month Period Ended September 30, Ended September 30, 2019 2019 Variable $ 156 $ 453 Operating 43 127 Finance: Amortization 4 12 Interest 10 31 Short-term 2 6 Total lease costs $ 215 $ 629 Weighted-average remaining lease term (years): Operating leases 7.8 Finance leases 29.3 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): Nine-Month Period Ended September 30, 2019 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ (106 ) Operating cash flows from finance leases (32 ) Financing cash flows from finance leases (14 ) Right-of-use assets obtained in exchange for lease liabilities: Operating leases $ 49 Finance leases 12 The Company has the following remaining lease commitments as of (in millions): September 30, 2019 December 31, 2018 (1) Operating Finance Total Operating Capital Total 2019 $ 38 $ 16 $ 54 $ 147 $ 69 $ 216 2020 139 70 209 128 68 196 2021 118 76 194 110 73 183 2022 96 69 165 87 67 154 2023 68 58 126 61 56 117 Thereafter 241 779 1,020 159 772 931 Total undiscounted lease payments 700 1,068 1,768 $ 692 $ 1,105 $ 1,797 Less - amounts representing interest (126 ) (551 ) (677 ) Lease liabilities $ 574 $ 517 $ 1,091 (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 Adoption 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 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 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. Leases Lessee 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. 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. PacifiCorp'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. 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. 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. The following table summarizes PacifiCorp's leases recorded on the Consolidated Balance Sheet (in millions): As of September 30, 2019 Right-of-use assets: Operating leases $ 13 Finance leases 19 Total right-of-use assets $ 32 Lease liabilities: Operating leases $ 13 Finance leases 19 Total lease liabilities $ 32 The following table summarizes PacifiCorp's lease costs (in millions): Three-Month Period Nine-Month Period Ended September 30, Ended September 30, 2019 2019 Variable $ 10 $ 36 Operating 1 2 Finance: Amortization — 1 Interest 1 2 Short-term — 1 Total lease costs $ 12 $ 42 Weighted-average remaining lease term (years): Operating leases 13.6 Finance leases 9.3 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 three- and nine-month periods ended September 30, 2019 and 2018 , respectively. PacifiCorp has the following remaining lease commitments as of (in millions): September 30, 2019 December 31, 2018 (1) Operating Finance Total Operating Capital Total 2019 $ 1 $ 1 $ 2 $ 3 $ 4 $ 7 2020 3 3 6 3 4 7 2021 2 7 9 3 7 10 2022 2 3 5 2 3 5 2023 2 2 4 2 2 4 Thereafter 7 16 23 7 16 23 Total undiscounted lease payments 17 32 49 $ 20 $ 36 $ 56 Less - amounts representing interest (4 ) (13 ) (17 ) Lease liabilities $ 13 $ 19 $ 32 (1) Amounts included for comparability and accounted for in accordance with ASC 840, "Leases".
Lessee, Operating Leases [Text Block]	Leases Adoption 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 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 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. Leases Lessee 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. 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. PacifiCorp'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. 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. 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. The following table summarizes PacifiCorp's leases recorded on the Consolidated Balance Sheet (in millions): As of September 30, 2019 Right-of-use assets: Operating leases $ 13 Finance leases 19 Total right-of-use assets $ 32 Lease liabilities: Operating leases $ 13 Finance leases 19 Total lease liabilities $ 32 The following table summarizes PacifiCorp's lease costs (in millions): Three-Month Period Nine-Month Period Ended September 30, Ended September 30, 2019 2019 Variable $ 10 $ 36 Operating 1 2 Finance: Amortization — 1 Interest 1 2 Short-term — 1 Total lease costs $ 12 $ 42 Weighted-average remaining lease term (years): Operating leases 13.6 Finance leases 9.3 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 three- and nine-month periods ended September 30, 2019 and 2018 , respectively. PacifiCorp has the following remaining lease commitments as of (in millions): September 30, 2019 December 31, 2018 (1) Operating Finance Total Operating Capital Total 2019 $ 1 $ 1 $ 2 $ 3 $ 4 $ 7 2020 3 3 6 3 4 7 2021 2 7 9 3 7 10 2022 2 3 5 2 3 5 2023 2 2 4 2 2 4 Thereafter 7 16 23 7 16 23 Total undiscounted lease payments 17 32 49 $ 20 $ 36 $ 56 Less - amounts representing interest (4 ) (13 ) (17 ) Lease liabilities $ 13 $ 19 $ 32 (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 Adoption 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 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 to the opening balance of retained earnings at the date of initial adoption. 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. 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. The following table summarizes Nevada Power's leases recorded on the Consolidated Balance Sheet (in millions): As of September 30, 2019 Right-of-use assets: Operating leases $ 14 Finance leases 442 Total right-of-use assets $ 456 Lease liabilities: Operating leases $ 17 Finance leases 454 Total lease liabilities $ 471 The following table summarizes Nevada Power's lease costs (in millions): Three-Month Period Nine-Month Period Ended September 30, Ended September 30, 2019 2019 Variable $ 113 $ 333 Operating 1 2 Finance: Amortization 3 9 Interest 8 28 Total lease costs $ 125 $ 372 Weighted-average remaining lease term (years): Operating leases 7.7 Finance leases 30.9 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): Nine-Month Period Ended September 30, 2019 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ (2 ) Operating cash flows from finance leases (29 ) Financing cash flows from finance leases (11 ) Right-of-use assets obtained in exchange for lease liabilities: Finance leases $ 8 Nevada Power has the following remaining lease commitments as of (in millions): September 30, 2019 December 31, 2018 (1) Operating Finance Total Operating Capital Total 2019 $ 1 $ 13 $ 14 $ 3 $ 59 $ 62 2020 3 59 62 3 59 62 2021 3 63 66 3 61 64 2022 2 61 63 3 60 63 2023 2 51 53 2 50 52 Thereafter 9 715 724 10 709 719 Total undiscounted lease payments 20 962 982 $ 24 $ 998 $ 1,022 Less - amounts representing interest (3 ) (508 ) (511 ) Lease liabilities $ 17 $ 454 $ 471 (1) Amounts included for comparability and accounted for in accordance with ASC Topic 840, "Leases " .
Lessee, Operating Leases [Text Block]	Leases Adoption 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 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 to the opening balance of retained earnings at the date of initial adoption. 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. 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. The following table summarizes Nevada Power's leases recorded on the Consolidated Balance Sheet (in millions): As of September 30, 2019 Right-of-use assets: Operating leases $ 14 Finance leases 442 Total right-of-use assets $ 456 Lease liabilities: Operating leases $ 17 Finance leases 454 Total lease liabilities $ 471 The following table summarizes Nevada Power's lease costs (in millions): Three-Month Period Nine-Month Period Ended September 30, Ended September 30, 2019 2019 Variable $ 113 $ 333 Operating 1 2 Finance: Amortization 3 9 Interest 8 28 Total lease costs $ 125 $ 372 Weighted-average remaining lease term (years): Operating leases 7.7 Finance leases 30.9 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): Nine-Month Period Ended September 30, 2019 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ (2 ) Operating cash flows from finance leases (29 ) Financing cash flows from finance leases (11 ) Right-of-use assets obtained in exchange for lease liabilities: Finance leases $ 8 Nevada Power has the following remaining lease commitments as of (in millions): September 30, 2019 December 31, 2018 (1) Operating Finance Total Operating Capital Total 2019 $ 1 $ 13 $ 14 $ 3 $ 59 $ 62 2020 3 59 62 3 59 62 2021 3 63 66 3 61 64 2022 2 61 63 3 60 63 2023 2 51 53 2 50 52 Thereafter 9 715 724 10 709 719 Total undiscounted lease payments 20 962 982 $ 24 $ 998 $ 1,022 Less - amounts representing interest (3 ) (508 ) (511 ) Lease liabilities $ 17 $ 454 $ 471 (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]
Lessee, Finance Leases [Text Block]	Leases Adoption 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 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 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. 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. The following table summarizes Sierra Pacific's leases recorded on the Balance Sheet (in millions): As of September 30, 2019 Right-of-use assets: Operating leases $ 18 Finance leases 41 Total right-of-use assets $ 59 Lease liabilities: Operating leases $ 18 Finance leases 42 Total lease liabilities $ 60 The following table summarizes Sierra Pacific's lease costs (in millions): Three-Month Period Nine-Month Period Ended September 30, Ended September 30, 2019 2019 Variable $ 21 $ 51 Operating — 1 Finance: Amortization — 1 Interest 1 2 Total lease costs $ 22 $ 55 Weighted-average remaining lease term (years): Operating leases 26.0 Finance leases 22.1 Weighted-average discount rate: Operating leases 5.0 % Finance leases 7.2 % The following table summarizes Sierra Pacific's supplemental cash flow information relating to leases (in millions): Nine-Month Period Ended September 30, 2019 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ (2 ) Operating cash flows from finance leases (2 ) Financing cash flows from finance leases (2 ) 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): September 30, 2019 December 31, 2018 (1) Operating Finance Total Operating Capital Total 2019 $ — $ 2 $ 2 $ 2 $ 6 $ 8 2020 2 6 8 2 4 6 2021 2 6 8 2 5 7 2022 1 5 6 1 4 5 2023 1 5 6 1 4 5 Thereafter 27 48 75 28 47 75 Total undiscounted lease payments 33 72 105 $ 36 $ 70 $ 106 Less - amounts representing interest (15 ) (30 ) (45 ) Lease liabilities $ 18 $ 42 $ 60 (1) Amounts included for comparability and accounted for in accordance with ASC Topic 840, "Leases".
Lessee, Operating Leases [Text Block]	Leases Adoption 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 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 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. 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. The following table summarizes Sierra Pacific's leases recorded on the Balance Sheet (in millions): As of September 30, 2019 Right-of-use assets: Operating leases $ 18 Finance leases 41 Total right-of-use assets $ 59 Lease liabilities: Operating leases $ 18 Finance leases 42 Total lease liabilities $ 60 The following table summarizes Sierra Pacific's lease costs (in millions): Three-Month Period Nine-Month Period Ended September 30, Ended September 30, 2019 2019 Variable $ 21 $ 51 Operating — 1 Finance: Amortization — 1 Interest 1 2 Total lease costs $ 22 $ 55 Weighted-average remaining lease term (years): Operating leases 26.0 Finance leases 22.1 Weighted-average discount rate: Operating leases 5.0 % Finance leases 7.2 % The following table summarizes Sierra Pacific's supplemental cash flow information relating to leases (in millions): Nine-Month Period Ended September 30, 2019 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ (2 ) Operating cash flows from finance leases (2 ) Financing cash flows from finance leases (2 ) 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): September 30, 2019 December 31, 2018 (1) Operating Finance Total Operating Capital Total 2019 $ — $ 2 $ 2 $ 2 $ 6 $ 8 2020 2 6 8 2 4 6 2021 2 6 8 2 5 7 2022 1 5 6 1 4 5 2023 1 5 6 1 4 5 Thereafter 27 48 75 28 47 75 Total undiscounted lease payments 33 72 105 $ 36 $ 70 $ 106 Less - amounts representing interest (15 ) (30 ) (45 ) Lease liabilities $ 18 $ 42 $ 60 (1) Amounts included for comparability and accounted for in accordance with ASC Topic 840, "Leases".

Recent Financing Transactions

Recent Financing Transactions	9 Months Ended
	Sep. 30, 2019
Debt Instrument [Line Items]
Recent Financing Transactions	Recent Financing Transactions Long-Term Debt In October 2019, MidAmerican Energy issued $600 million of its 3.15% First Mortgage Bonds due April 2050 and $250 million of its 3.65% First Mortgage Bonds due April 2029, which are part of the same series as the 3.65% First Mortgage Bonds issued in January 2019. An amount equal to the net proceeds was used to finance capital expenditures, disbursed during the period from December 20, 2018 to July 15, 2019, with respect to investments in MidAmerican Energy's 2,000-megawatt (nameplate capacity) Wind XI project, MidAmerican Energy's 591-megawatt (nameplate capacity) Wind XII project and the repowering of certain of MidAmerican Energy's existing wind facilities, which were previously financed with MidAmerican Energy's general funds. In October 2019, Northern Powergrid (Yorkshire) plc issued £300 million of its 2.25% Bonds due October 2059 and intends to use the net proceeds for general corporate purposes. In June 2019, Northern Natural Gas issued $200 million of its 4.30% Senior Bonds due January 2049. The bonds are part of the same series as the $450 million aggregate principal amount of 4.30% bonds due 2049 that were issued in July 2018. Northern Natural Gas intends to use the net proceeds to fund capital expenditures and for general corporate purposes. In May 2019, Northern Electric Finance plc issued £150 million of its 2.75% Guaranteed Bonds due May 2049 and intends to use the net proceeds for general corporate purposes. In March 2019, PacifiCorp issued $400 million of its 3.50% First Mortgage Bonds due June 2029 and $600 million of its 4.15% First Mortgage Bonds due February 2050. PacifiCorp used a portion of the net proceeds to repay short-term debt partially incurred in January 2019 to repay all of PacifiCorp's $350 million 5.50% First Mortgage Bonds due January 2019 and intends to use the remaining net proceeds to fund capital expenditures and for general corporate purposes. In February 2019, MidAmerican Energy redeemed $500 million of its 2.40% First Mortgage Bonds due in March 2019 at a redemption price of 100% of the principal amount plus accrued interest. In January 2019, Nevada Power issued $500 million of its 3.70% General and Refunding Mortgage Notes, Series CC, due May 2029. Nevada Power used the net proceeds to repay all of Nevada Power's $500 million 7.125% General and Refunding Mortgage Notes, Series V, maturing in March 2019. In January 2019, MidAmerican Energy issued $600 million of its 3.65% First Mortgage Bonds due April 2029 and $900 million of its 4.25% First Mortgage Bonds due July 2049. An amount equal to the net proceeds was used to finance capital expenditures, disbursed during the period from November 1, 2017 to December 14, 2018, with respect to investments in MidAmerican Energy's 2,000-megawatt (nameplate capacity) Wind XI project, MidAmerican Energy's 591-megawatt (nameplate capacity) Wind XII project and the repowering of certain of MidAmerican Energy's existing wind facilities, which were previously financed with MidAmerican Energy's general funds. Credit Facilities In October 2019, Northern Powergrid amended and restated its existing £150 million multicurrency revolving credit facility expiring April 2020, extending the expiration date to October 2022 with two one-year extension options. In August 2019, MidAmerican Energy entered into a $400 million unsecured credit facility, which expires August 2020 and has a variable rate based on the Eurodollar rate or a base rate, at MidAmerican Energy's option, plus a spread. The 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 any quarter. In May 2019, BHE extended, with lender consent, the expiration date for its existing $3.5 billion unsecured credit facility to June 2022 by exercising the first of two available one-year extensions. In May 2019, PacifiCorp extended, with lender consent, the expiration date for each of its two existing $600 million unsecured credit facilities to June 2022 by exercising the remaining one-year extension option for one facility and exercising the first of two available one-year extensions for the second facility. In May 2019, MidAmerican Energy extended, with lender consent, the expiration date for its existing $900 million unsecured credit facility to June 2022 by exercising the remaining one-year extension option. In May 2019, Nevada Power and Sierra Pacific extended, with lender consent, the expiration date for its $400 million and $250 million secured credit facilities, respectively, to June 2022 by exercising the remaining one-year extension options.
Nevada Power Company [Member]
Debt Instrument [Line Items]
Recent Financing Transactions	Recent Financing Transactions Long-Term Debt In January 2019, Nevada Power issued $500 million of its 3.70% General and Refunding Mortgage Notes, Series CC, due May 2029. Nevada Power used the net proceeds to repay all of Nevada Power's $500 million 7.125% General and Refunding Mortgage Notes, Series V, maturing in March 2019. Credit Facilities In May 2019, Nevada Power extended, with lender consent, the expiration date for its $400 million secured credit facility to June 2022 by exercising the remaining one-year extension option.
PacifiCorp [Member]
Debt Instrument [Line Items]
Recent Financing Transactions	Recent Financing Transactions Long-Term Debt In March 2019, PacifiCorp issued $400 million of its 3.50% First Mortgage Bonds due June 2029 and $600 million of its 4.15% First Mortgage Bonds due February 2050. PacifiCorp used a portion of the net proceeds to repay short-term debt that was partially incurred in January 2019 to repay all of PacifiCorp's $350 million 5.50% First Mortgage Bonds due January 2019 and intends to use the remaining net proceeds to fund capital expenditures and for general corporate purposes. Credit Facilities In May 2019, PacifiCorp extended, with lender consent, the expiration date for each of its two existing $600 million unsecured credit facilities to June 2022 by exercising the remaining one-year extension option for one facility and exercising the first of two available one-year extensions for the second facility. In March 2019, PacifiCorp completed a re-offering of variable rate tax-exempt bond obligations totaling $168 million , involving the cancellation, at PacifiCorp's request, of $170 million of letters of credit support by the issuing banks. As a result, PacifiCorp's credit facility support for outstanding variable rate tax-exempt bond obligations increased by $168 million .
MidAmerican Energy Company [Member]
Debt Instrument [Line Items]
Recent Financing Transactions	Recent Financing Transactions Long-Term Debt In October 2019, MidAmerican Energy issued $600 million of its 3.15% First Mortgage Bonds due April 2050 and $250 million of its 3.65% First Mortgage Bonds due April 2029, which are part of the same series as the 3.65% First Mortgage Bonds issued in January 2019. An amount equal to the net proceeds was used to finance capital expenditures, disbursed during the period from December 20, 2018 to July 15, 2019, with respect to investments in MidAmerican Energy's 2,000-megawatt (nameplate capacity) Wind XI project, MidAmerican Energy's 591-megawatt (nameplate capacity) Wind XII project and the repowering of certain of MidAmerican Energy's existing wind facilities, which were previously financed with MidAmerican Energy's general funds. In February 2019, MidAmerican Energy redeemed $500 million of its 2.40% First Mortgage Bonds due in March 2019 at a redemption price of 100% of the principal amount plus accrued interest. In January 2019, MidAmerican Energy issued $600 million of its 3.65% First Mortgage Bonds due April 2029 and $900 million of its 4.25% First Mortgage Bonds due July 2049. An amount equal to the net proceeds was used to finance capital expenditures, disbursed during the period from November 1, 2017 to December 14, 2018, with respect to investments in MidAmerican Energy's 2,000-megawatt (nameplate capacity) Wind XI project, MidAmerican Energy's 591-megawatt (nameplate capacity) Wind XII project and the repowering of certain of MidAmerican Energy's existing wind facilities, which were previously financed with MidAmerican Energy's general funds. Credit Facilities In August 2019, MidAmerican Energy entered into a $400 million unsecured credit facility, which expires August 2020 and has a variable rate based on the Eurodollar rate or a base rate, at MidAmerican Energy's option, plus a spread. The 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 any quarter. In May 2019, MidAmerican Energy extended, with lender consent, the expiration date for its existing $900 million unsecured credit facility to June 2022 by exercising the remaining one-year extension option.
MidAmerican Funding, LLC and Subsidiaries [Domain]
Debt Instrument [Line Items]
Recent Financing Transactions	Recent Financing Transactions Refer to Note 5 of MidAmerican Energy's Notes to Financial Statements.
Sierra Pacific Power Company [Member]
Debt Instrument [Line Items]
Recent Financing Transactions	Recent Financing Transactions Long-Term Debt In April 2019, Sierra Pacific purchased the following series of bonds that were held by the public: $30 million of its variable-rate tax-exempt Water Facilities Refunding Revenue Bonds, Series 2016C, due 2036; $25 million of its variable-rate tax-exempt Water Facilities Refunding Revenue Bonds, Series 2016D, due 2036; and $25 million of its variable-rate tax-exempt Water Facilities Refunding Revenue Bonds, Series 2016E, due 2036. Sierra Pacific purchased the Series 2016C, Series 2016D and Series 2016E bonds as required by the bond indentures. In April 2019, Sierra Pacific entered into a re-offering of the following series of bonds: $30 million of its variable-rate tax-exempt Humboldt County Pollution Control Refunding Revenue Bonds, Series 2016B, due 2029; the Series 2016D bonds; the Series 2016E bonds; $75 million of its variable-rate tax-exempt Water Facilities Refunding Revenue Bonds, Series 2016F, due 2036; and $20 million of its variable-rate tax-exempt Water Facilities Refunding Revenue Bonds, Series 2016G, due 2036. The Series 2016B and Series 2016G bonds were offered at a fixed rate of 1.85% . The Series 2016D, Series 2016E and Series 2016F bonds were offered at a fixed rate of 2.05% . Sierra Pacific previously purchased the Series 2016B, Series 2016F and Series 2016G bonds on their date of issuance. Sierra Pacific holds the Series 2016C bonds and the bonds could be issued at a future date if required by future regulatory proceedings. Sierra Pacific used the net proceeds of the re-offering for general corporate purposes. In June 2019, Sierra Pacific purchased the following series of bonds that were held by the public: $59 million of its fixed-rate tax-exempt Gas Facilities Refunding Revenue Bonds, Series 2016A, due 2031 and $20 million of its fixed-rate tax-exempt Humboldt County Pollution Control Refunding Revenue Bonds, Series 2016A, due 2029. Sierra Pacific holds these bonds and the bonds could be issued at a future date if required by future regulatory proceedings. Credit Facilities In May 2019, Sierra Pacific extended, with lender consent, the expiration date for its $250 million secured credit facility to June 2022 by exercising the remaining one-year extension option.

Income Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2019
Schedule of Effective Income Tax Rate Reconciliation [Line Items]
Income Tax Disclosure [Text Block]	Income Taxes 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: Three-Month Periods Nine-Month Periods Ended September 30, Ended September 30, 2019 2018 2019 2018 Federal statutory income tax rate 21 % 21 % 21 % 21 % Income tax credits (43 ) (19 ) (35 ) (29 ) State income tax, net of federal income tax benefit (3 ) 1 (6 ) (6 ) Income tax effect of foreign income (1 ) — (2 ) (3 ) Effects of ratemaking (9 ) (2 ) (5 ) (3 ) Equity income — — — — Other, net (1 ) 1 — 1 Effective income tax rate (36 )% 2 % (27 )% (19 )% Income tax credits relate primarily to production tax credits from wind-powered generating facilities owned by MidAmerican Energy , PacifiCorp and BHE Renewables . Federal renewable electricity production tax credits 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 tax has been computed on a stand-alone basis. Berkshire Hathaway includes the Company in its United States federal and Iowa state income tax returns and the majority of all of its currently payable or receivable income tax is remitted to or received from Berkshire Hathaway . For the nine-month periods ended September 30, 2019 and 2018 , the Company received net cash payments for federal income taxes from Berkshire Hathaway totaling $534 million and $450 million , respectively.
PacifiCorp [Member]
Schedule of Effective Income Tax Rate Reconciliation [Line Items]
Income Tax Disclosure [Text Block]	Income Taxes 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: Three-Month Periods Nine-Month Periods Ended September 30, Ended September 30, 2019 2018 2019 2018 Federal statutory income tax rate 21 % 21 % 21 % 21 % State income tax, net of federal income tax benefit 3 4 3 4 Federal income tax credits (3 ) (5 ) (4 ) (5 ) Effects of ratemaking (3 ) (4 ) (2 ) (4 ) Amortization of excess deferred income taxes (18 ) — (7 ) — Other (1 ) (1 ) — (2 ) Effective income tax rate (1 )% 15 % 11 % 14 % Income tax credits relate primarily to production tax credits earned by PacifiCorp's wind-powered generating facilities. Federal renewable electricity production tax credits 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 relates primarily to the amortization of $49 million of Oregon's allocated excess deferred income taxes pursuant to the Oregon Renewable Adjustment Clause settlement, whereby a portion of Oregon's allocated excess deferred income taxes was used to accelerate depreciation on Oregon's share of replaced equipment associated with certain repowered wind facilities.
Sierra Pacific Power Company [Member]
Schedule of Effective Income Tax Rate Reconciliation [Line Items]
Income Tax Disclosure [Text Block]	Income Taxes 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: Three-Month Periods Nine-Month Periods Ended September 30, Ended September 30, 2019 2018 2019 2018 Federal statutory income tax rate 21 % 21 % 21 % 21 % Nondeductible expenses — 5 — 4 Effects of ratemaking — 1 — — Other — — 1 — Effective income tax rate 21 % 27 % 22 % 25 %
MidAmerican Energy Company [Member]
Schedule of Effective Income Tax Rate Reconciliation [Line Items]
Income Tax Disclosure [Text Block]	Income Taxes A reconciliation of the federal statutory income tax rate to MidAmerican Energy 's effective income tax rate applicable to income before income tax benefit is as follows: Three-Month Periods Nine-Month Periods Ended September 30, Ended September 30, 2019 2018 2019 2018 Federal statutory income tax rate 21 % 21 % 21 % 21 % Income tax credits (35 ) (95 ) (75 ) (97 ) State income tax, net of federal income tax benefit (18 ) (10 ) (19 ) (9 ) Effects of ratemaking (7 ) (4 ) (7 ) (7 ) Other, net 1 — (1 ) (1 ) Effective income tax rate (38 )% (88 )% (81 )% (93 )% Income tax credits relate primarily to production tax credits from MidAmerican Energy 's wind-powered generating facilities. Federal renewable electricity production tax credits 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. Due to a combination of declines in pre-tax income and increases in production tax credits in recent years and changes in estimates for these values throughout the year, the volatility of the effective tax rate used to determine the recognition of income tax expense each quarter has similarly increased. MidAmerican Energy concluded that, due to such increased volatility, it was no longer able to reasonably estimate an annual effective tax rate for this purpose. Accordingly, beginning January 1, 2019, production tax credits are recognized in the Statement of Operations as they are earned, and excluded in the determination of the effective tax rate used in the recognition of all other income tax expense. Production tax credits recognized in income for the three-month periods ended September 30, 2019 and 2018 were $69 million and $241 million , respectively, with $185 million lower production tax credits recognized attributable to the change in the method of interim period recognition in 2019. Production tax credits recognized in income for the nine-month periods ended September 30, 2019 and 2018 were $259 million and $349 million , respectively, with $129 million lower production tax credits recognized attributable to the change in the method of interim period recognition in 2019. Berkshire Hathaway includes BHE and subsidiaries in its United States federal and Iowa state income tax returns. Consistent with established regulatory practice, MidAmerican Energy 's provision for income tax has been computed on a stand-alone basis, and substantially all of its currently payable or receivable income tax is remitted to or received from BHE . MidAmerican Energy received net cash payments for income tax from BHE totaling $309 million and $232 million for the nine-month periods ended September 30, 2019 and 2018 , respectively.
MidAmerican Funding, LLC and Subsidiaries [Domain]
Schedule of Effective Income Tax Rate Reconciliation [Line Items]
Income Tax Disclosure [Text Block]	Income Taxes A reconciliation of the federal statutory income tax rate to MidAmerican Funding 's effective income tax rate applicable to income before income tax benefit is as follows: Three-Month Periods Nine-Month Periods Ended September 30, Ended September 30, 2019 2018 2019 2018 Federal statutory income tax rate 21 % 21 % 21 % 21 % Income tax credits (36 ) (97 ) (78 ) (101 ) State income tax, net of federal income tax benefit (18 ) (10 ) (20 ) (10 ) Effects of ratemaking (7 ) (5 ) (7 ) (7 ) Other, net — — (1 ) — Effective income tax rate (40 )% (91 )% (85 )% (97 )% Income tax credits relate primarily to production tax credits from MidAmerican Energy's wind-powered generating facilities. Federal renewable electricity production tax credits 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. Due to a combination of declines in pre-tax income and increases in production tax credits in recent years and changes in estimates for these values throughout the year, the volatility of the effective tax rate used to determine the recognition of income tax expense each quarter has similarly increased. MidAmerican Energy concluded that, due to such increased volatility, it was no longer able to reasonably estimate an annual effective tax rate for this purpose. Accordingly, beginning January 1, 2019, production tax credits are recognized in the Statement of Operations as they are earned, and excluded in the determination of the effective tax rate used in the recognition of all other income tax expense. Production tax credits recognized in income for the three-month periods ended September 30, 2019 and 2018 were $69 million and $241 million , respectively, with $185 million lower production tax credits recognized attributable to the change in the method of interim period recognition in 2019. Production tax credits recognized in income for the nine-month periods ended September 30, 2019 and 2018 were $259 million and $349 million , respectively, with $129 million lower production tax credits recognized attributable to the change in the method of interim period recognition in 2019. Berkshire Hathaway includes BHE and subsidiaries in its United States federal and Iowa state income tax returns. Consistent with established regulatory practice, MidAmerican Funding 's and MidAmerican Energy's provisions for income tax have been computed on a stand-alone basis, and substantially all of their currently payable or receivable income tax is remitted to or received from BHE . MidAmerican Funding received net cash payments for income tax from BHE totaling $313 million and $248 million for the nine-month period ended September 30, 2019 and 2018 , respectively.

Employee Benefit Plans

Employee Benefit Plans	9 Months Ended
	Sep. 30, 2019
Defined Benefit Plan Disclosure [Line Items]
Employee Benefit Plans	Employee Benefit Plans Domestic Operations Net periodic benefit cost (credit) for the domestic pension and other postretirement benefit plans included the following components (in millions): Three-Month Periods Nine-Month Periods Ended September 30, Ended September 30, 2019 2018 2019 2018 Pension: Service cost $ 4 $ 5 $ 12 $ 15 Interest cost 27 26 82 78 Expected return on plan assets (38 ) (41 ) (115 ) (123 ) Net amortization 8 8 24 23 Net periodic benefit cost (credit) $ 1 $ (2 ) $ 3 $ (7 ) Other postretirement: Service cost $ 1 $ 1 $ 6 $ 6 Interest cost 6 7 20 19 Expected return on plan assets (10 ) (9 ) (30 ) (31 ) Net amortization — (3 ) (3 ) (9 ) Net periodic benefit credit $ (3 ) $ (4 ) $ (7 ) $ (15 ) Amounts other than the service cost for pension and other postretirement benefit plans are recorded in Other, net in the Consolidated Statements of Operations. Employer contributions to the domestic pension and other postretirement benefit plans are expected to be $13 million and $1 million , respectively, during 2019 . As of September 30, 2019 , $9 million and $- million of contributions had been made to the domestic pension and other postretirement benefit plans, respectively. Foreign Operations Net periodic benefit cost for the United Kingdom pension plan included the following components (in millions): Three-Month Periods Nine-Month Periods Ended September 30, Ended September 30, 2019 2018 2019 2018 Service cost $ 3 $ 5 $ 11 $ 15 Interest cost 13 14 39 42 Expected return on plan assets (24 ) (25 ) (74 ) (78 ) Settlement 21 12 21 36 Net amortization 9 9 27 38 Net periodic benefit cost $ 22 $ 15 $ 24 $ 53 Amounts other than the service cost for the United Kingdom pension plan are recorded in Other, net in the Consolidated Statements of Operations. Employer contributions to the United Kingdom pension plan are expected to be £44 million during 2019 . As of September 30, 2019 , £33 million , or $42 million , of contributions had been made to the United Kingdom pension plan.
PacifiCorp [Member]
Defined Benefit Plan Disclosure [Line Items]
Employee Benefit Plans	Employee Benefit Plans Net periodic benefit credit for the pension and other postretirement benefit plans included the following components (in millions): Three-Month Periods Nine-Month Periods Ended September 30, Ended September 30, 2019 2018 2019 2018 Pension: Service cost $ — $ — $ — $ — Interest cost 11 11 33 32 Expected return on plan assets (17 ) (18 ) (50 ) (54 ) Net amortization 3 3 9 10 Net periodic benefit credit $ (3 ) $ (4 ) (8 ) (12 ) Other postretirement: Service cost $ — $ — $ 1 $ 1 Interest cost 3 3 9 9 Expected return on plan assets (6 ) (5 ) (16 ) (16 ) Net amortization 1 (1 ) 1 (4 ) Net periodic benefit credit $ (2 ) $ (3 ) (5 ) (10 ) Amounts other than the service cost for pension and other postretirement benefit plans are recorded in Other, net in the Consolidated Statements of Operations. Employer contributions to the pension and other postretirement benefit plans are expected to be $4 million and $- million, respectively, during 2019 . As of September 30, 2019 , $3 million and $- million of contributions had been made to the pension and other postretirement benefit plans, respectively.
MidAmerican Energy Company [Member]
Defined Benefit Plan Disclosure [Line Items]
Employee Benefit Plans	Employee Benefit Plans 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. 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. Net periodic benefit credit for the plans of MidAmerican Energy and the aforementioned affiliates included the following components (in millions): Three-Month Periods Nine-Month Periods Ended September 30, Ended September 30, 2019 2018 2019 2018 Pension: Service cost $ 2 $ 2 $ 5 $ 6 Interest cost 7 7 22 21 Expected return on plan assets (10 ) (11 ) (31 ) (33 ) Net amortization — 1 — 2 Net periodic benefit credit $ (1 ) $ (1 ) $ (4 ) $ (4 ) Other postretirement: Service cost $ 1 $ 1 $ 4 $ 4 Interest cost 2 2 7 6 Expected return on plan assets (3 ) (3 ) (9 ) (10 ) Net amortization (1 ) (1 ) (3 ) (3 ) Net periodic benefit credit $ (1 ) $ (1 ) $ (1 ) $ (3 ) Amounts other than the service cost for pension and other postretirement benefit plans are recorded in Other, net in the Statements of Operations. Employer contributions to the pension and other postretirement benefit plans are expected to be $7 million and $1 million , respectively, during 2019 . As of September 30, 2019 , $5 million and $- million of contributions had been made to the pension and other postretirement benefit plans, respectively.
MidAmerican Funding, LLC and Subsidiaries [Domain]
Defined Benefit Plan Disclosure [Line Items]
Employee Benefit Plans	Employee Benefit Plans Refer to Note 7 of MidAmerican Energy's Notes to Financial Statements.
Nevada Power Company [Member]
Defined Benefit Plan Disclosure [Line Items]
Employee Benefit Plans	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. 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 (in millions): As of September 30, December 31, 2019 2018 Qualified Pension Plan: Other long-term liabilities $ 26 $ 26 Non-Qualified Pension Plans: Other current liabilities 1 1 Other long-term liabilities 9 9 Other Postretirement Plans: Other long-term liabilities 1 1
Sierra Pacific Power Company [Member]
Defined Benefit Plan Disclosure [Line Items]
Employee Benefit Plans	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. 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 (in millions): As of September 30, December 31, 2019 2018 Qualified Pension Plan: Other long-term liabilities $ 18 $ 19 Non-Qualified Pension Plans: Other current liabilities 1 1 Other long-term liabilities 7 7 Other Postretirement Plans: Other long-term liabilities 13 13

Asset Retirement Obligation Ass

Asset Retirement Obligation Asset Retirement Obligations (Notes)	9 Months Ended
	Sep. 30, 2019
Asset Retirement Obligations Disclosure [Line Items]
Schedule of Change in Asset Retirement Obligation [Table Text Block]	Asset Retirement Obligations 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 Energy Company [Member]
Asset Retirement Obligations Disclosure [Line Items]
Schedule of Change in Asset Retirement Obligation [Table Text Block]	The following table reconciles the beginning and ending balances of MidAmerican Energy's ARO liabilities for the nine-month period ended September 30, 2019 (in millions): Beginning balance $ 562 Change in estimated costs 237 Additions 5 Retirements (2 ) Accretion 22 Ending balance $ 824
Asset Retirement Obligation Disclosure [Text Block]	Asset Retirement Obligations 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. The following table reconciles the beginning and ending balances of MidAmerican Energy's ARO liabilities for the nine-month period ended September 30, 2019 (in millions): Beginning balance $ 562 Change in estimated costs 237 Additions 5 Retirements (2 ) Accretion 22 Ending balance $ 824
MidAmerican Funding, LLC and Subsidiaries [Domain]
Asset Retirement Obligations Disclosure [Line Items]
Asset Retirement Obligation Disclosure [Text Block]	Asset Retirement Obligations Refer to Note 8 of MidAmerican Energy's Notes to Financial Statements.

Risk Management and Hedging Act

Risk Management and Hedging Activities	9 Months Ended
	Sep. 30, 2019
PacifiCorp [Member]
Derivative [Line Items]
Risk Management and Hedging Activities	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 regulated 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 Note 9 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 September 30, 2019 Not designated as hedging contracts (1) : Commodity assets $ 7 $ 1 $ 4 $ 1 $ 13 Commodity liabilities (2 ) — (34 ) (59 ) (95 ) Total 5 1 (30 ) (58 ) (82 ) Total derivatives 5 1 (30 ) (58 ) (82 ) Cash collateral receivable — — 20 34 54 Total derivatives - net basis $ 5 $ 1 $ (10 ) $ (24 ) $ (28 ) 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 September 30, 2019 and December 31, 2018 , a regulatory asset of $81 million and $96 million , respectively, was recorded related to the net derivative liability of $82 million and $97 million , respectively. The following table reconciles the beginning and ending balances of PacifiCorp's net regulatory assets and summarizes the pre-tax gains and losses on commodity derivative contracts recognized in net regulatory assets, as well as amounts reclassified to earnings (in millions): Three-Month Periods Nine-Month Periods Ended September 30, Ended September 30, 2019 2018 2019 2018 Beginning balance $ 101 $ 116 $ 96 $ 101 Changes in fair value 16 14 (12 ) 48 Net losses reclassified to operating revenue (11 ) (36 ) (27 ) (30 ) Net (losses) gains reclassified to cost of fuel and energy (25 ) 8 24 (17 ) Ending balance $ 81 $ 102 $ 81 $ 102 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 (in millions): Unit of September 30, December 31, Measure 2019 2018 Electricity sales, net Megawatt hours (3 ) (6 ) Natural gas purchases Decatherms 108 117 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 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 derivative contracts 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," or in some cases terminate the contract, in the event of a material adverse change in PacifiCorp's creditworthiness. These rights can vary by contract and by counterparty. As of September 30, 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 $92 million and $113 million as of September 30, 2019 and December 31, 2018 , respectively, for which PacifiCorp had posted collateral of $54 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 September 30, 2019 and December 31, 2018 , PacifiCorp would have been required to post $31 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

Fair Value Measurements	9 Months Ended
	Sep. 30, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Measurements	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 financial 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 September 30, 2019 Assets: Commodity derivatives $ — $ 36 $ 103 $ (25 ) $ 114 Interest rate derivatives — 7 23 — 30 Mortgage loans held for sale — 1,060 — — 1,060 Money market mutual funds (2) 837 — — — 837 Debt securities: United States government obligations 189 — — — 189 International government obligations — 5 — — 5 Corporate obligations — 57 — — 57 Municipal obligations — 1 — — 1 Agency, asset and mortgage-backed obligations — 1 — — 1 Equity securities: United States companies 309 — — — 309 International companies 1,132 — — — 1,132 Investment funds 182 — — — 182 $ 2,649 $ 1,167 $ 126 $ (25 ) $ 3,917 Liabilities: Commodity derivatives $ (3 ) $ (142 ) $ (25 ) $ 101 $ (69 ) Interest rate derivatives (3 ) (21 ) (3 ) — (27 ) $ (6 ) $ (163 ) $ (28 ) $ 101 $ (96 ) Input Levels for Fair Value Measurements Level 1 Level 2 Level 3 Other (1) Total 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 $76 million and $59 million as of September 30, 2019 and December 31, 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 (in millions): Three-Month Periods Nine-Month Periods Ended September 30, Ended September 30, Interest Interest Commodity Rate Commodity Rate Derivatives Derivatives Derivatives Derivatives 2019: Beginning balance $ 86 $ 23 $ 99 $ 10 Changes included in earnings 1 158 6 305 Changes in fair value recognized in OCI — — (1 ) — Changes in fair value recognized in net regulatory assets (17 ) — (40 ) — Purchases — — 4 — Settlements 8 (161 ) 10 (295 ) Ending balance $ 78 $ 20 $ 78 $ 20 2018: Beginning balance $ 83 $ 17 $ 94 $ 9 Changes included in earnings (1 ) 54 3 140 Changes in fair value recognized in OCI 1 — 1 — Changes in fair value recognized in net regulatory assets 3 — (11 ) — Purchases 1 — 2 — Settlements (3 ) (61 ) (5 ) (139 ) Ending balance $ 84 $ 10 $ 84 $ 10 The Company's long-term debt is carried at cost on the Consolidated Balance Sheets. 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 (in millions): As of September 30, 2019 As of December 31, 2018 Carrying Fair Carrying Fair Value Value Value Value Long-term debt $ 37,909 $ 44,979 $ 36,250 $ 38,874
PacifiCorp [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Measurements	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 financial 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 September 30, 2019 Assets: Commodity derivatives $ — $ 13 $ — $ (7 ) $ 6 Money market mutual funds (2) 322 — — — 322 Investment funds 25 — — — 25 $ 347 $ 13 $ — $ (7 ) $ 353 Liabilities - Commodity derivatives $ — $ (95 ) $ — $ 61 $ (34 ) 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 $54 million and $59 million as of September 30, 2019 and December 31, 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 8 for further discussion regarding PacifiCorp's risk management and hedging activities. PacifiCorp's investments in money market mutual funds and investment funds are stated at fair value. When available, PacifiCorp uses a readily observable quoted market price or net asset value of an identical security in an active market to record the fair value. In the absence of a quoted market price or net asset value of an identical security, the fair value is determined using pricing models or net asset values based on observable market inputs and quoted market prices of securities with similar characteristics. PacifiCorp's long-term debt is carried at cost on the Consolidated Balance Sheets. The fair value of PacifiCorp's long-term debt is a Level 2 fair value measurement and has been estimated based upon quoted market prices, where available, or at the present value of future cash flows discounted at rates consistent with comparable maturities with similar credit risks. The carrying value of PacifiCorp's variable-rate long-term debt approximates fair value because of the frequent repricing of these instruments at market rates. The following table presents the carrying value and estimated fair value of PacifiCorp's long-term debt (in millions): As of September 30, 2019 As of December 31, 2018 Carrying Fair Carrying Fair Value Value Value Value Long-term debt $ 7,657 $ 9,392 $ 7,015 $ 7,833
MidAmerican Energy Company [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Measurements	air 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 financial 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 September 30, 2019: Assets: Commodity derivatives $ — $ 4 $ — $ (1 ) $ 3 Money market mutual funds (2) 3 — — — 3 Debt securities: United States government obligations 189 — — — 189 International government obligations — 5 — — 5 Corporate obligations — 57 — — 57 Municipal obligations — 1 — — 1 Agency, asset and mortgage-backed obligations — 1 — — 1 Equity securities: United States companies 309 — — — 309 International companies 8 — — — 8 Investment funds 19 — — — 19 $ 528 $ 68 $ — $ (1 ) $ 595 Liabilities - commodity derivatives $ — $ (8 ) $ — $ 2 $ (6 ) Input Levels for Fair Value Measurements Level 1 Level 2 Level 3 Other (1) Total 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 ) (1) Represents netting under master netting arrangements and a net cash collateral receivable of $1 million and $- million as of September 30, 2019 and December 31, 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. MidAmerican Energy's investments in money market mutual funds and debt and equity securities are stated at fair value, with debt securities primarily 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 Balance Sheets. 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 (in millions): As of September 30, 2019 As of December 31, 2018 Carrying Value Fair Value Carrying Value Fair Value Long-term debt $ 6,342 $ 7,519 $ 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	Fair Value Measurements Refer to Note 9 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 (in millions): As of September 30, 2019 As of December 31, 2018 Carrying Value Fair Value Carrying Value Fair Value Long-term debt $ 6,582 $ 7,840 $ 5,619 $ 5,941
Nevada Power Company [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Measurements	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 September 30, 2019 Assets: Money market mutual funds (1) $ 261 $ — $ — $ 261 Investment funds 2 — — 2 $ 263 $ — $ — $ 263 Liabilities - commodity derivatives $ — $ — $ (18 ) $ (18 ) 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 September 30, 2019 and December 31, 2018 , 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 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 commodity derivative assets and liabilities measured at fair value on a recurring basis using significant Level 3 inputs (in millions): Three-Month Periods Nine-Month Periods Ended September 30, Ended September 30, 2019 2018 2019 2018 Beginning balance $ (11 ) $ (9 ) $ 3 $ (3 ) Changes in fair value recognized in regulatory assets (13 ) 2 (30 ) (6 ) Settlements 6 — 9 2 Ending balance $ (18 ) $ (7 ) $ (18 ) $ (7 ) 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 (in millions): As of September 30, 2019 As of December 31, 2018 Carrying Fair Carrying Fair Value Value Value Value Long-term debt $ 2,350 $ 2,891 $ 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	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 September 30, 2019 Assets - money market mutual funds (1) $ 56 $ — $ — $ 56 Liabilities - commodity derivatives $ — $ — $ (4 ) $ (4 ) 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 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 (in millions): As of September 30, 2019 As of December 31, 2018 Carrying Fair Carrying Fair Value Value Value Value Long-term debt $ 1,135 $ 1,270 $ 1,120 $ 1,167

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2019
Loss Contingencies [Line Items]
Commitments and Contingencies	Commitments and Contingencies Fuel, Capacity and Transmission Contract Commitments In October 2019, Nevada Power terminated a power purchase agreement, due to the supplier's failure to satisfy its performance obligations as detailed in the agreement, that had minimum annual payments of approximately $60 million in 2019 through 2023 and $1,145 million in 2024 and thereafter, as of December 31, 2018 . Construction Commitments During the nine-month period ended September 30, 2019 , PacifiCorp and MidAmerican Energy entered into firm construction commitments totaling $1.1 billion for the remainder of 2019 through 2021 related to repowering and development of certain existing and new wind facilities in Wyoming, Montana, Washington and Iowa. Easements During the nine-month period ended September 30, 2019 , PacifiCorp and MidAmerican Energy entered into non-cancelable easements with minimum payments totaling $593 million through 2060 for land in Wyoming, Montana and Iowa, on which some of its wind-powered generating facilities will be located. Maintenance and Service Contracts During the nine-month period ended September 30, 2019 , PacifiCorp and MidAmerican Energy entered into non-cancelable maintenance and service contracts related to wind-powered generating facilities with minimum payments totaling $618 million through 2032 . 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 Solar Farm LLC ("Topaz") and owns a 49% interest in Agua Caliente Solar, LLC ("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 PPA that is in effect until October 2039. As of September 30, 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 September 30, 2019 , the Company's equity investment in Agua Caliente totals $70 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 deliveries and all amounts invoiced to date for post-petition energy deliveries for both Topaz and Agua Caliente in 2019. 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 California Assembly Bill 1054 ("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 California Public Utilities Commission 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. The Company 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 and are described below. 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 remains pending. 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]
Loss Contingencies [Line Items]
Commitments and Contingencies	Commitments and Contingencies Construction Commitments During the nine-month period ended September 30, 2019 , PacifiCorp entered into firm construction commitments totaling $754 million for the remainder of 2019 through 2021 related to repowering and development of certain existing and new wind facilities in Wyoming, Montana and Washington. Easements During the nine-month period ended September 30, 2019 , PacifiCorp entered into non-cancelable easements with minimum payments totaling $252 million through 2060 for land in Wyoming and Montana, on which some of its new wind-powered generating facilities will be located. Maintenance and Service Contracts During the nine-month period ended September 30, 2019 , PacifiCorp entered into non-cancelable maintenance and service contracts related to wind-powered generating facilities with minimum payments totaling $241 million through 2032 . 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 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 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 remains pending. 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]
Loss Contingencies [Line Items]
Commitments and Contingencies	Commitments and Contingencies Construction Commitments During the nine-month period ended September 30, 2019 , MidAmerican Energy entered into firm construction commitments totaling $337 million for the remainder of 2019 through 2020 related to the construction of wind-powered generating facilities in Iowa. Easements During the nine-month period ended September 30, 2019 , MidAmerican Energy entered into non-cancelable easements with minimum payments totaling $341 million through 2059 for land in Iowa on which some of its wind-powered generating facilities will be located. Maintenance and Service Contracts During the nine-month period ended September 30, 2019 , MidAmerican Energy entered into non-cancelable maintenance and service contracts related to wind-powered generating facilities with minimum payment commitments totaling $377 million through 2029 . 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. Environmental Laws and Regulations MidAmerican Energy is subject to federal, state and local 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 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. 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. MidAmerican Energy is authorized by the FERC to include a 0.50% adder beyond the base ROE effective January 2015. In September 2016, the FERC issued an order for the first complaint, which reduces the base ROE to 10.32% and required refunds, plus interest, for the period from November 2013 through February 2015. Customer refunds relative to the first complaint occurred in February 2017. It is uncertain when the FERC will rule on the second complaint, covering the period from February 2015 through May 2016. MidAmerican Energy believes it is probable that the FERC will order a base ROE lower than 12.38% in the second complaint and, as of September 30, 2019 , has accrued a $10 million liability for refunds under the second complaint of amounts collected under the higher ROE from March 2015 through May 2016.
MidAmerican Funding, LLC and Subsidiaries [Domain]
Loss Contingencies [Line Items]
Commitments and Contingencies	Commitments and Contingencies 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. Refer to Note 10 of MidAmerican Energy's Notes to Financial Statements.
Nevada Power Company [Member]
Loss Contingencies [Line Items]
Commitments and Contingencies	Commitments and Contingencies Fuel, Capacity and Transmission Contract Commitments In October 2019, Nevada Power terminated a power purchase agreement, due to the supplier's failure to satisfy its performance obligations as detailed in the agreement, that had minimum annual payments of approximately $60 million in 2019 through 2023 and $1,145 million in 2024 and thereafter, as of December 31, 2018 . Environmental Laws and Regulations Nevada Power is subject to federal, state and local 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 Nevada Power's current and future operations. Nevada Power believes it is in material compliance with all applicable laws and regulations. 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.
Sierra Pacific Power Company [Member]
Loss Contingencies [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 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 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.

Revenue from Contracts with Cus

Revenue from Contracts with Customers Revenue from Contracts with Customers (Notes)	9 Months Ended
	Sep. 30, 2019
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customer	Revenue from Contracts with Customers Energy Products and Services The following table summarizes the Company's energy products and services revenue from contracts with customers ("Customer 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 14 (in millions): For the Three-Month Period Ended September 30, 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 $ 1,320 $ 651 $ 998 $ — $ — $ — $ — $ (1 ) $ 2,968 Retail gas — 61 16 — — — — — 77 Wholesale 8 56 6 — — — — (1 ) 69 Transmission and distribution 26 16 27 195 — 179 — — 443 Interstate pipeline — — — — 221 — — (25 ) 196 Other — — — — — — — — — Total Regulated 1,354 784 1,047 195 221 179 — (27 ) 3,753 Nonregulated — 9 — 9 — 5 276 161 460 Total Customer Revenue 1,354 793 1,047 204 221 184 276 134 4,213 Other revenue 13 4 7 26 5 — 53 16 124 Total $ 1,367 $ 797 $ 1,054 $ 230 $ 226 $ 184 $ 329 $ 150 $ 4,337 For the Nine-Month Period Ended September 30, 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 $ 3,613 $ 1,561 $ 2,183 $ — $ — $ — $ — $ (1 ) $ 7,356 Retail gas — 416 74 — — — — — 490 Wholesale 47 232 34 — — — — (2 ) 311 Transmission and distribution 76 47 75 634 — 514 — — 1,346 Interstate pipeline — — — — 805 — — (86 ) 719 Other — — 1 — — — — — 1 Total Regulated 3,736 2,256 2,367 634 805 514 — (89 ) 10,223 Nonregulated — 25 — 27 — 13 599 442 1,106 Total Customer Revenue 3,736 2,281 2,367 661 805 527 599 353 11,329 Other revenue 57 18 22 75 4 — 146 78 400 Total $ 3,793 $ 2,299 $ 2,389 $ 736 $ 809 $ 527 $ 745 $ 431 $ 11,729 For the Three-Month Period Ended September 30, 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 $ 1,323 $ 647 $ 1,002 $ — $ — $ — $ — $ (1 ) $ 2,971 Retail gas — 83 13 — — — — — 96 Wholesale (2) (10 ) 82 9 — — — — (1 ) 80 Transmission and distribution 30 14 28 196 — 171 — — 439 Interstate pipeline — — — — 283 — — (25 ) 258 Other — — — — — — — — — Total Regulated 1,343 826 1,052 196 283 171 — (27 ) 3,844 Nonregulated — 2 — 10 — 3 235 176 426 Total Customer Revenue 1,343 828 1,052 206 283 174 235 149 4,270 Other revenue (3) 26 4 7 27 (24 ) — 85 24 149 Total $ 1,369 $ 832 $ 1,059 $ 233 $ 259 $ 174 $ 320 $ 173 $ 4,419 For the Nine-Month Period Ended September 30, 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 $ 3,534 $ 1,538 $ 2,232 $ — $ — $ — $ — $ (1 ) $ 7,303 Retail gas — 428 72 — — — — — 500 Wholesale 21 262 26 — — — — (3 ) 306 Transmission and distribution 82 44 73 661 — 525 — — 1,385 Interstate pipeline — — — — 893 — — (91 ) 802 Other — — 1 — — — — — 1 Total Regulated 3,637 2,272 2,404 661 893 525 — (95 ) 10,297 Nonregulated — 7 1 31 — 6 538 478 1,061 Total Customer Revenue 3,637 2,279 2,405 692 893 531 538 383 11,358 Other revenue (3) 109 18 21 65 (22 ) — 182 87 460 Total $ 3,746 $ 2,297 $ 2,426 $ 757 $ 871 $ 531 $ 720 $ 470 $ 11,818 (1) The BHE and Other reportable segment represents amounts related principally to other entities, corporate functions and intersegment eliminations. (2) Includes net payments to counterparties for the financial settlement of certain non-derivative forward contracts for energy sales at PacifiCorp. (3) 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 Customer Revenue by line of business (in millions): HomeServices Three-Month Periods Nine-Month Periods Ended September 30, Ended September 30, 2019 2018 2019 2018 Customer Revenue: Brokerage $ 1,172 $ 1,122 $ 3,087 $ 2,975 Franchise 20 18 53 52 Total Customer Revenue 1,192 1,140 3,140 3,027 Other revenue 115 78 279 225 Total $ 1,307 $ 1,218 $ 3,419 $ 3,252 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 September 30, 2019 , by reportable segment (in millions): Performance obligations expected to be satisfied: Less than 12 months More than 12 months Total BHE Pipeline Group $ 922 $ 5,309 $ 6,231
PacifiCorp [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customer	Revenue from Contracts with Customers The following table summarizes PacifiCorp's revenue from contracts with customers ("Customer Revenue") by customer class (in millions): Three-Month Periods Nine-Month Periods Ended September 30, Ended September 30, 2019 2018 2019 2018 Customer Revenue: Retail: Residential $ 478 $ 478 $ 1,316 $ 1,284 Commercial 419 418 1,152 1,129 Industrial 306 305 887 862 Other retail 100 106 203 204 Total retail 1,303 1,307 3,558 3,479 Wholesale (1) 8 (10 ) 47 21 Transmission 26 30 76 82 Other Customer Revenue 17 16 55 55 Total Customer Revenue 1,354 1,343 3,736 3,637 Other revenue 13 26 57 109 Total operating revenue $ 1,367 $ 1,369 $ 3,793 $ 3,746 (1) Includes net payments to counterparties for the financial settlement of certain non-derivative forward contracts for energy sales.
Nevada Power Company [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customer	Revenue from Contracts with Customers The following table summarizes Nevada Power's revenue from contracts with customers ("Customer Revenue") by customer class (in millions): Three-Month Periods Nine-Month Periods Ended September 30, Ended September 30, 2019 2018 2019 2018 Customer Revenue: Retail: Residential $ 468 $ 484 $ 934 $ 989 Commercial 142 135 346 340 Industrial 169 164 351 351 Other 4 7 15 18 Total fully bundled 783 790 1,646 1,698 Distribution only service 9 9 24 24 Total retail 792 799 1,670 1,722 Wholesale, transmission and other 8 15 39 38 Total Customer Revenue 800 814 1,709 1,760 Other revenue 6 6 19 17 Total revenue $ 806 $ 820 $ 1,728 $ 1,777
Sierra Pacific Power Company [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customer	Revenue from Contracts with Customers The following table summarizes Sierra Pacific's revenue from contracts with customers ("Customer Revenue") by customer class, including a reconciliation to Sierra Pacific's reportable segment information included in Note 12 (in millions): Three-Month Periods Ended September 30, 2019 2018 Electric Gas Total Electric Gas Total Customer Revenue: Retail: Residential $ 75 $ 11 $ 86 $ 76 $ 9 $ 85 Commercial 80 3 83 75 3 78 Industrial 58 1 59 59 1 60 Other 2 — 2 2 — 2 Total fully bundled 215 15 230 212 13 225 Distribution only service 1 — 1 1 — 1 Total retail 216 15 231 213 13 226 Wholesale, transmission and other 16 — 16 12 1 13 Total Customer Revenue 232 15 247 225 14 239 Other revenue — 1 1 — — — Total revenue $ 232 $ 16 $ 248 $ 225 $ 14 $ 239 Nine-Month Periods Ended September 30, 2019 2018 Electric Gas Total Electric Gas Total Customer Revenue: Retail: Residential $ 201 $ 49 $ 250 $ 203 $ 48 $ 251 Commercial 188 18 206 190 18 208 Industrial 143 6 149 136 6 142 Other 5 — 5 5 — 5 Total fully bundled 537 73 610 534 72 606 Distribution only service 3 — 3 3 — 3 Total retail 540 73 613 537 72 609 Wholesale, transmission and other 44 — 44 35 1 36 Total Customer Revenue 584 73 657 572 73 645 Other revenue 2 2 4 3 1 4 Total revenue $ 586 $ 75 $ 661 $ 575 $ 74 $ 649
MidAmerican Energy Company [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customer	Revenue from Contracts with Customers The following table summarizes MidAmerican Energy's revenue from contracts with customers ("Customer Revenue") by line of business and customer class, including a reconciliation to MidAmerican Energy's reportable segment information included in Note 12 , (in millions): For the Three-Month Periods Ended September 30, 2019 2018 Electric Natural Gas Other Total Electric Natural Gas Other Total Customer Revenue: Retail: Residential $ 228 $ 41 $ — $ 269 $ 233 $ 54 $ — $ 287 Commercial 101 10 — 111 100 17 — 117 Industrial 274 3 — 277 268 3 — 271 Natural gas transportation services — 7 — 7 — 8 — 8 Other retail (1) 48 — — 48 46 1 — 47 Total retail 651 61 — 712 647 83 — 730 Wholesale 41 15 — 56 62 20 — 82 Multi-value transmission projects 17 — — 17 14 — — 14 Other Customer Revenue — — 8 8 — — 2 2 Total Customer Revenue 709 76 8 793 723 103 2 828 Other revenue 3 — — 3 4 — — 4 Total operating revenue $ 712 $ 76 $ 8 $ 796 $ 727 $ 103 $ 2 $ 832 For the Nine-Month Periods Ended September 30, 2019 2018 Electric Natural Gas Other Total Electric Natural Gas Other Total Customer Revenue: Retail: Residential $ 547 $ 282 $ — $ 829 $ 567 $ 287 $ — $ 854 Commercial 255 95 — 350 251 100 — 351 Industrial 641 12 — 653 608 13 — 621 Natural gas transportation services — 27 — 27 — 27 — 27 Other retail (1) 118 — — 118 113 1 — 114 Total retail 1,561 416 — 1,977 1,539 428 — 1,967 Wholesale 168 64 — 232 187 75 — 262 Multi-value transmission projects 47 — — 47 43 — — 43 Other Customer Revenue — — 23 23 — — 5 5 Total Customer Revenue 1,776 480 23 2,279 1,769 503 5 2,277 Other revenue 16 2 — 18 16 2 — 18 Total operating revenue $ 1,792 $ 482 $ 23 $ 2,297 $ 1,785 $ 505 $ 5 $ 2,295 (1) Other retail includes provisions for rate refunds, for which any actual refunds will be reflected in the applicable customer classes upon resolution of the related regulatory proceeding.
MidAmerican Funding, LLC and Subsidiaries [Domain]
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customer	Revenue from Contracts with Customers Refer to Note 11 of MidAmerican Energy's Notes to Financial Statements. Additionally, MidAmerican Funding had other Accounting Standards Codification Topic 606 revenue of $1 million and $- million for the three-month periods ended September 30, 2019 and 2018 , respectively, and $2 million for the nine-month periods ended September 30, 2019 and 2018 , respectively.

Components of Accumulated Other

Components of Accumulated Other Comprehensive Loss, Net	9 Months Ended
	Sep. 30, 2019
Accumulated Other Comprehensive Income (Loss) [Line Items]
Components of Accumulated Other Comprehensive Income (Loss), Net	Components of Other Comprehensive Income (Loss), Net The following table shows the change in AOCI attributable to BHE shareholders by each component of OCI, net of applicable income tax (in millions): Unrecognized Foreign Unrealized Unrealized AOCI Amounts on Currency Gains on Gains (Losses) Attributable Retirement Translation Marketable on Cash To BHE Benefits Adjustment Securities Flow Hedges Shareholders, Net Balance, December 31, 2017 $ (383 ) $ (1,129 ) $ 1,085 $ 29 $ (398 ) Adoption of ASU 2016-01 — — (1,085 ) — (1,085 ) Other comprehensive income (loss) 50 (236 ) — 2 (184 ) Balance, September 30, 2018 $ (333 ) $ (1,365 ) $ — $ 31 $ (1,667 ) Balance, December 31, 2018 $ (358 ) $ (1,623 ) $ — $ 36 $ (1,945 ) Other comprehensive loss (40 ) (66 ) — (28 ) (134 ) Balance, September 30, 2019 $ (398 ) $ (1,689 ) $ — $ 8 $ (2,079 )

Segment Information

Segment Information	9 Months Ended
	Sep. 30, 2019
Segment Reporting Information [Line Items]
Segment Reporting Disclosure [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): Three-Month Periods Nine-Month Periods Ended September 30, Ended September 30, 2019 2018 2019 2018 Operating revenue: PacifiCorp $ 1,367 $ 1,369 $ 3,793 $ 3,746 MidAmerican Funding 797 832 2,299 2,297 NV Energy 1,054 1,059 2,389 2,426 Northern Powergrid 230 233 736 757 BHE Pipeline Group 226 259 809 871 BHE Transmission 184 174 527 531 BHE Renewables 329 320 745 720 HomeServices 1,307 1,218 3,419 3,252 BHE and Other (1) 150 173 431 470 Total operating revenue $ 5,644 $ 5,637 $ 15,148 $ 15,070 Depreciation and amortization: PacifiCorp $ 272 $ 203 $ 686 $ 602 MidAmerican Funding 184 133 540 499 NV Energy 121 114 361 341 Northern Powergrid 60 62 186 189 BHE Pipeline Group 28 27 85 99 BHE Transmission 59 61 177 184 BHE Renewables 71 68 210 198 HomeServices 11 14 35 37 BHE and Other (1) — (1 ) (2 ) (2 ) Total depreciation and amortization $ 806 $ 681 $ 2,278 $ 2,147 Three-Month Periods Nine-Month Periods Ended September 30, Ended September 30, 2019 2018 2019 2018 Operating income: PacifiCorp $ 333 $ 386 $ 885 $ 917 MidAmerican Funding 234 278 444 444 NV Energy 313 307 547 540 Northern Powergrid 98 102 337 360 BHE Pipeline Group 87 105 398 388 BHE Transmission 91 82 244 244 BHE Renewables 183 176 298 308 HomeServices 113 85 209 185 BHE and Other (1) (2 ) 2 (34 ) (20 ) Total operating income 1,450 1,523 3,328 3,366 Interest expense (475 ) (453 ) (1,428 ) (1,380 ) Capitalized interest 23 17 56 44 Allowance for equity funds 56 30 126 75 Interest and dividend income 25 27 91 85 (Losses) gains on marketable securities, net (234 ) 260 (296 ) (336 ) Other, net 2 19 67 50 Total income before income tax expense and equity income $ 847 $ 1,423 $ 1,944 $ 1,904 Interest expense: PacifiCorp $ 101 $ 96 $ 299 $ 288 MidAmerican Funding 74 61 223 185 NV Energy 55 52 173 169 Northern Powergrid 33 34 102 107 BHE Pipeline Group 14 11 38 31 BHE Transmission 40 42 118 127 BHE Renewables 44 49 132 150 HomeServices 6 6 20 16 BHE and Other (1) 108 102 323 307 Total interest expense $ 475 $ 453 $ 1,428 $ 1,380 Operating revenue by country: United States $ 5,222 $ 5,209 $ 13,875 $ 13,757 United Kingdom 229 232 734 754 Canada 183 174 526 531 Philippines and other 10 22 13 28 Total operating revenue by country $ 5,644 $ 5,637 $ 15,148 $ 15,070 Income before income tax benefit and equity income (loss) by country: United States $ 728 $ 1,290 $ 1,546 $ 1,501 United Kingdom 49 59 228 220 Canada 55 43 134 125 Philippines and other 15 31 36 58 Total income before income tax benefit and equity income (loss) by country $ 847 $ 1,423 $ 1,944 $ 1,904 As of September 30, December 31, 2019 2018 Assets: PacifiCorp $ 24,789 $ 23,478 MidAmerican Funding 21,806 20,029 NV Energy 14,477 14,119 Northern Powergrid 7,334 7,427 BHE Pipeline Group 5,775 5,511 BHE Transmission 8,692 8,424 BHE Renewables 9,650 8,666 HomeServices 3,971 2,797 BHE and Other (1) 1,419 1,738 Total assets $ 97,913 $ 92,189 (1) The differences between the reportable segment amounts and the consolidated amounts, described as BHE and Other , relate principally to other entities, corporate functions and intersegment eliminations. The following table shows the change in the carrying amount of goodwill by reportable segment for the nine-month period ended September 30, 2019 (in millions): BHE Pipeline Group PacifiCorp MidAmerican Funding NV Energy Northern Powergrid BHE Transmission BHE Renewables HomeServices Total December 31, 2018 $ 1,129 $ 2,102 $ 2,369 $ 952 $ 73 $ 1,448 $ 95 $ 1,427 $ 9,595 Acquisitions — — — — — — — 30 30 Foreign currency translation — — — (26 ) — 44 — — 18 September 30, 2019 $ 1,129 $ 2,102 $ 2,369 $ 926 $ 73 $ 1,492 $ 95 $ 1,457 $ 9,643
MidAmerican Energy Company [Member]
Segment Reporting Information [Line Items]
Segment Reporting Disclosure [Text Block]	Segment Information MidAmerican Energy has identified two reportable segments: regulated electric and regulated natural gas. The regulated electric segment derives most of its revenue from regulated retail sales of electricity to residential, commercial, and industrial customers and from wholesale sales. The regulated natural gas segment derives most of its revenue from regulated retail sales of natural gas to residential, commercial, and industrial customers and also obtains revenue by transporting natural gas owned by others through its distribution system. Pricing for regulated electric and regulated natural gas sales are established separately by regulatory agencies; therefore, management also reviews each segment separately to make decisions regarding allocation of resources and in evaluating performance. Common operating costs, interest income, interest expense and income tax expense are allocated to each segment based on certain factors, which primarily relate to the nature of the cost. The following tables provide information on a reportable segment basis (in millions): Three-Month Periods Nine-Month Periods Ended September 30, Ended September 30, 2019 2018 2019 2018 Operating revenue: Regulated electric $ 712 $ 727 $ 1,792 $ 1,785 Regulated natural gas 76 103 482 505 Other 8 2 23 5 Total operating revenue $ 796 $ 832 $ 2,297 $ 2,295 Operating income: Regulated electric $ 243 $ 278 $ 396 $ 392 Regulated natural gas (8 ) 1 45 52 Other (1 ) (1 ) 2 — Total operating income 234 278 443 444 Interest expense (68 ) (56 ) (207 ) (170 ) Allowance for borrowed funds 7 6 20 14 Allowance for equity funds 27 16 59 39 Other, net 4 13 34 34 Income before income tax benefit $ 204 $ 257 $ 349 $ 361 As of September 30, December 31, Assets: Regulated electric $ 18,341 $ 16,511 Regulated natural gas 1,343 1,406 Other 10 3 Total assets $ 19,694 $ 17,920
MidAmerican Funding, LLC and Subsidiaries [Domain]
Segment Reporting Information [Line Items]
Segment Reporting Disclosure [Text Block]	Segment Information MidAmerican Funding has identified two reportable segments: regulated electric and regulated natural gas. The regulated electric segment derives most of its revenue from regulated retail sales of electricity to residential, commercial, and industrial customers and from wholesale sales. The regulated natural gas segment derives most of its revenue from regulated retail sales of natural gas to residential, commercial, and industrial customers and also obtains revenue by transporting natural gas owned by others through its distribution system. Pricing for regulated electric and regulated natural gas sales are established separately by regulatory agencies; therefore, management also reviews each segment separately to make decisions regarding allocation of resources and in evaluating performance. Common operating costs, interest income, interest expense and income tax expense are allocated to each segment based on certain factors, which primarily relate to the nature of the cost. "Other" in the tables below consists of the financial results and assets of nonregulated operations, MHC and MidAmerican Funding . The following tables provide information on a reportable segment basis (in millions): Three-Month Periods Nine-Month Periods Ended September 30, Ended September 30, 2019 2018 2019 2018 Operating revenue: Regulated electric $ 712 $ 727 $ 1,792 $ 1,785 Regulated natural gas 76 103 482 505 Other 9 2 25 7 Total operating revenue $ 797 $ 832 $ 2,299 $ 2,297 Operating income: Regulated electric $ 243 $ 278 $ 396 $ 392 Regulated natural gas (8 ) 1 45 52 Other (1 ) (1 ) 3 — Total operating income 234 278 444 444 Interest expense (74 ) (61 ) (223 ) (185 ) Allowance for borrowed funds 7 6 20 14 Allowance for equity funds 27 16 59 39 Other, net 5 12 36 35 Income before income tax benefit $ 199 $ 251 $ 336 $ 347 As of September 30, December 31, Assets (1) : Regulated electric $ 19,532 $ 17,702 Regulated natural gas 1,422 1,485 Other 25 15 Total assets $ 20,979 $ 19,202 (1) Assets by reportable segment reflect the assignment of goodwill to applicable reporting units.
Sierra Pacific Power Company [Member]
Segment Reporting Information [Line Items]
Segment Reporting Disclosure [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): Three-Month Periods Nine-Month Periods Ended September 30, Ended September 30, 2019 2018 2019 2018 Operating revenue: Regulated electric $ 232 $ 225 $ 586 $ 575 Regulated natural gas 16 14 75 74 Total operating revenue $ 248 $ 239 $ 661 $ 649 Operating income: Regulated electric $ 67 $ 56 $ 119 $ 111 Regulated natural gas — — 12 11 Total operating income 67 56 131 122 Interest expense (12 ) (12 ) (36 ) (33 ) Allowance for borrowed funds — — 1 1 Allowance for equity funds — 1 2 3 Other, net 1 3 4 8 Income before income tax expense $ 56 $ 48 $ 102 $ 101 As of September 30, December 31, 2019 2018 Assets: Regulated electric $ 3,282 $ 3,177 Regulated natural gas 304 314 Regulated common assets (1) 82 78 Total assets $ 3,668 $ 3,569 (1) Consists principally of cash and cash equivalents not included in either the regulated electric or regulated natural gas segments.

Related Party Transactions Rela

Related Party Transactions Related Party Transactions (Notes)	9 Months Ended
	Sep. 30, 2019
PacifiCorp [Member]
Related Party Transaction [Line Items]
Related Party Transactions Disclosure [Text Block]	Related Party Berkshire Hathaway includes BHE and its subsidiaries in its United States federal income tax return. Consistent with established regulatory practice, PacifiCorp's provision for federal and state income tax has been computed on a stand-alone basis, and substantially all of its currently payable or receivable income tax is remitted to or received from BHE. For the nine-month periods ended September 30, 2019 and 2018, PacifiCorp made net cash payments for federal and state income tax to BHE totaling $128 million and $21 million , respectively.

BHE Shareholders' Equity (Notes

BHE Shareholders' Equity (Notes)	9 Months Ended
	Sep. 30, 2019
Equity [Abstract]
Stockholders' Equity Note Disclosure [Text Block]	BHE Shareholders' Equity For the nine-month periods ended September 30, 2019 and 2018 , BHE repurchased 447,712 shares of its common stock for $293 million and 177,381 shares of its common stock for $107 million , respectively.

Cash and Cash Equivalents and_2

Cash and Cash Equivalents and Restricted Cash and Cash Equivalents Supplemental Cash Flow Disclosure (Policies)	9 Months Ended
	Sep. 30, 2019
MidAmerican Funding, LLC and Subsidiaries [Domain]
Cash and Cash Equivalents, Policy [Policy Text Block]	Cash equivalents consist of funds invested in money market mutual funds, United States Treasury Bills and other investments with a maturity of three months or less when purchased. Cash and cash equivalents exclude amounts where availability is restricted by legal requirements, loan agreements or other contractual provisions. Restricted cash and cash equivalents as of September 30, 2019 and December 31, 2018 , consist substantially of funds restricted for the purpose of constructing solid waste facilities under tax-exempt bond obligation agreements.
MidAmerican Energy Company [Member]
Cash and Cash Equivalents, Policy [Policy Text Block]	Cash equivalents consist of funds invested in money market mutual funds, United States Treasury Bills and other investments with a maturity of three months or less when purchased. Cash and cash equivalents exclude amounts where availability is restricted by legal requirements, loan agreements or other contractual provisions. Restricted cash and cash equivalents as of September 30, 2019 and December 31, 2018 , consist substantially of funds restricted for the purpose of constructing solid waste facilities under tax-exempt bond obligation agreements.

Investments and Restricted Ca_2

Investments and Restricted Cash and Investments (Tables)	9 Months Ended
	Sep. 30, 2019
Investments and Restricted Cash and Investments [Abstract]
Investments and Restricted Cash and Investments	Investments and restricted cash and cash equivalents and investments consists of the following (in millions): As of September 30, December 31, 2019 2018 Investments: BYD Company Limited common stock $ 1,124 $ 1,435 Rabbi trusts 395 371 Other 181 168 Total investments 1,700 1,974 Equity method investments: BHE Renewables tax equity investments 2,695 1,661 Electric Transmission Texas, LLC 553 527 Bridger Coal Company 83 99 Other 173 153 Total equity method investments 3,504 2,440 Restricted cash and cash equivalents and investments: Quad Cities Station nuclear decommissioning trust funds 571 504 Restricted cash and cash equivalents 265 256 Total restricted cash and cash equivalents and investments 836 760 Total investments and restricted cash and cash equivalents and investments $ 6,040 $ 5,174 Reflected as: Current assets $ 265 $ 271 Noncurrent assets 5,775 4,903 Total investments and restricted cash and cash equivalents and investments $ 6,040 $ 5,174
Unrealized Gain (Loss) on Investments [Table Text Block]	(Losses) gains on marketable securities, net recognized during the period consists of the following (in millions): Three-Month Periods Nine-Month Periods Ended September 30, Ended September 30, 2019 2018 2019 2018 Unrealized (losses) gains recognized on marketable securities still held at the reporting date $ (236 ) $ 260 $ (297 ) $ (337 ) Net gains recognized on marketable securities sold during the period 2 — 1 1 (Losses) gains on marketable securities, net $ (234 ) $ 260 $ (296 ) $ (336 )

Property, Plant and Equipment_2

Property, Plant and Equipment, Net (Tables)	9 Months Ended
	Sep. 30, 2019
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment [Table Text Block]	Property, plant and equipment, net consists of the following (in millions): As of Depreciable September 30, December 31, Life 2019 2018 Regulated assets: Utility generation, transmission and distribution systems 5-80 years $ 78,596 $ 76,707 Interstate natural gas pipeline assets 3-80 years 7,637 7,524 86,233 84,231 Accumulated depreciation and amortization (26,719 ) (25,894 ) Regulated assets, net 59,514 58,337 Nonregulated assets: Independent power plants 5-30 years 6,966 6,826 Other assets 3-30 years 1,606 1,424 8,572 8,250 Accumulated depreciation and amortization (2,075 ) (1,610 ) Nonregulated assets, net 6,497 6,640 Net operating assets 66,011 64,977 Construction work-in-progress 5,313 3,110 Property, plant and equipment, net $ 71,324 $ 68,087
MidAmerican Energy Company [Member]
Property, Plant and Equipment [Line Items]
Public Utility Property, Plant, and Equipment	Property, plant and equipment, net consists of the following (in millions): As of September 30, December 31, Depreciable Life 2019 2018 Utility plant in service, net: Generation 20-70 years $ 14,492 $ 13,727 Transmission 52-75 years 2,012 1,934 Electric distribution 20-75 years 3,842 3,672 Natural gas distribution 29-75 years 1,776 1,724 Utility plant in service 22,122 21,057 Accumulated depreciation and amortization (6,347 ) (5,941 ) Utility plant in service, net 15,775 15,116 Nonregulated property, net: Nonregulated property gross 20-50 years 7 7 Accumulated depreciation and amortization (1 ) (1 ) Nonregulated property, net 6 6 15,781 15,122 Construction work-in-progress 2,039 1,035 Property, plant and equipment, net $ 17,820 $ 16,157
PacifiCorp [Member]
Property, Plant and Equipment [Line Items]
Public Utility Property, Plant, and Equipment	As of September 30, December 31, Depreciable Life 2019 2018 Utility Plant: Generation 14 - 67 years $ 12,574 $ 12,606 Transmission 58 - 75 years 6,468 6,357 Distribution 20 - 70 years 7,217 7,030 Intangible plant (1) 5 - 75 years 1,002 970 Other 5 - 60 years 1,429 1,436 Utility plant in service 28,690 28,399 Accumulated depreciation and amortization (10,069 ) (10,034 ) Utility plant in-service, net 18,621 18,365 Other non-regulated, net of accumulated depreciation and amortization 47 years 10 10 Plant, net 18,631 18,375 Construction work-in-progress 1,977 1,195 Property, plant and equipment, net $ 20,608 $ 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	Property, plant and equipment, net consists of the following (in millions): As of Depreciable Life September 30, December 31, 2019 2018 Utility plant: Generation 30 - 55 years $ 3,730 $ 3,720 Distribution 20 - 65 years 3,503 3,411 Transmission 45 - 70 years 1,453 1,439 General and intangible plant 5 - 65 years 718 716 Utility plant 9,404 9,286 Accumulated depreciation and amortization (3,096 ) (2,966 ) Utility plant, net 6,308 6,320 Other non-regulated, net of accumulated depreciation and amortization 45 years 1 1 Plant, net 6,309 6,321 Construction work-in-progress 166 97 Property, plant and equipment, net $ 6,475 $ 6,418
Sierra Pacific Power Company [Member]
Property, Plant and Equipment [Line Items]
Public Utility Property, Plant, and Equipment	Property, plant and equipment, net consists of the following (in millions): As of Depreciable Life September 30, December 31, 2019 2018 Utility plant: Electric generation 25 - 60 years $ 1,133 $ 1,132 Electric distribution 20 - 100 years 1,657 1,568 Electric transmission 50 - 100 years 831 812 Electric general and intangible plant 5 - 70 years 175 185 Natural gas distribution 35 - 70 years 415 403 Natural gas general and intangible plant 5 - 70 years 14 14 Common general 5 - 70 years 322 321 Utility plant 4,547 4,435 Accumulated depreciation and amortization (1,624 ) (1,583 ) Utility plant, net 2,923 2,852 Other non-regulated, net of accumulated depreciation and amortization 70 years 4 5 Plant, net 2,927 2,857 Construction work-in-progress 99 90 Property, plant and equipment, net $ 3,026 $ 2,947

Cash and Cash Equivalents and_3

Cash and Cash Equivalents and Restricted Cash and Cash Equivalents Supplemental Cash Flow Disclosure (Tables)	9 Months Ended
	Sep. 30, 2019
Condensed Cash Flow Statements, Captions [Line Items]
Schedule of Cash Flow, Supplemental Disclosures [Table Text Block]	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 September 30, 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 September 30, 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 September 30, December 31, 2019 2018 Cash and cash equivalents $ 1,141 $ 627 Restricted cash and cash equivalents 238 227 Investments and restricted cash and cash equivalents and investments 27 29 Total cash and cash equivalents and restricted cash and cash equivalents $ 1,406 $ 883
Sierra Pacific Power Company [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Schedule of Cash Flow, Supplemental Disclosures [Table Text Block]	A reconciliation of cash and cash equivalents and restricted cash and cash equivalents as of September 30, 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 September 30, December 31, 2019 2018 Cash and cash equivalents $ 64 $ 71 Restricted cash and cash equivalents included in other current assets 4 5 Total cash and cash equivalents and restricted cash and cash equivalents $ 68 $ 76
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 September 30, 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 September 30, December 31, 2019 2018 Cash and cash equivalents $ 276 $ 111 Restricted cash and cash equivalents included in other current assets 8 10 Total cash and cash equivalents and restricted cash and cash equivalents $ 284 $ 121 Subsequent Event In October 2019, Nevada Power declared and paid a dividend to NV Energy, Inc. of $200 million .
PacifiCorp [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Schedule of Cash Flow, Supplemental Disclosures [Table Text Block]	As of September 30, December 31, 2019 2018 Cash and cash equivalents $ 331 $ 77 Restricted cash included in other current assets 19 13 Restricted cash included in other assets 2 2 Total cash and cash equivalents and restricted cash and cash equivalents $ 352 $ 92
MidAmerican Funding, LLC and Subsidiaries [Domain]
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 September 30, 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 September 30 December 31 2019 2018 Cash and cash equivalents $ 47 $ 1 Restricted cash and cash equivalents in other current assets 38 56 Total cash and cash equivalents and restricted cash and cash equivalents $ 85 $ 57
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 September 30, 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 September 30, December 31 2019 2018 Cash and cash equivalents $ 46 $ — Restricted cash and cash equivalents in other current assets 38 56 Total cash and cash equivalents and restricted cash and cash equivalents $ 84 $ 56

Leases Leases (Tables)

Leases Leases (Tables)	9 Months Ended
	Sep. 30, 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 September 30, 2019 Right-of-use assets: Operating leases $ 526 Finance leases 503 Total right-of-use assets $ 1,029 Lease liabilities: Operating leases $ 574 Finance leases 517 Total lease liabilities $ 1,091
Lease, Cost [Table Text Block]	The following table summarizes the Company's lease costs (in millions): Three-Month Period Nine-Month Period Ended September 30, Ended September 30, 2019 2019 Variable $ 156 $ 453 Operating 43 127 Finance: Amortization 4 12 Interest 10 31 Short-term 2 6 Total lease costs $ 215 $ 629 Weighted-average remaining lease term (years): Operating leases 7.8 Finance leases 29.3 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): Nine-Month Period Ended September 30, 2019 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ (106 ) Operating cash flows from finance leases (32 ) Financing cash flows from finance leases (14 ) Right-of-use assets obtained in exchange for lease liabilities: Operating leases $ 49 Finance leases 12
Operating and Finance Lease, Liability, Maturity [Table Text Block]	The Company has the following remaining lease commitments as of (in millions): September 30, 2019 December 31, 2018 (1) Operating Finance Total Operating Capital Total 2019 $ 38 $ 16 $ 54 $ 147 $ 69 $ 216 2020 139 70 209 128 68 196 2021 118 76 194 110 73 183 2022 96 69 165 87 67 154 2023 68 58 126 61 56 117 Thereafter 241 779 1,020 159 772 931 Total undiscounted lease payments 700 1,068 1,768 $ 692 $ 1,105 $ 1,797 Less - amounts representing interest (126 ) (551 ) (677 ) Lease liabilities $ 574 $ 517 $ 1,091 (1) Amounts included for comparability and accounted for in accordance with ASC 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 September 30, 2019 Right-of-use assets: Operating leases $ 13 Finance leases 19 Total right-of-use assets $ 32 Lease liabilities: Operating leases $ 13 Finance leases 19 Total lease liabilities $ 32
Lease, Cost [Table Text Block]	The following table summarizes PacifiCorp's lease costs (in millions): Three-Month Period Nine-Month Period Ended September 30, Ended September 30, 2019 2019 Variable $ 10 $ 36 Operating 1 2 Finance: Amortization — 1 Interest 1 2 Short-term — 1 Total lease costs $ 12 $ 42 Weighted-average remaining lease term (years): Operating leases 13.6 Finance leases 9.3 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): September 30, 2019 December 31, 2018 (1) Operating Finance Total Operating Capital Total 2019 $ 1 $ 1 $ 2 $ 3 $ 4 $ 7 2020 3 3 6 3 4 7 2021 2 7 9 3 7 10 2022 2 3 5 2 3 5 2023 2 2 4 2 2 4 Thereafter 7 16 23 7 16 23 Total undiscounted lease payments 17 32 49 $ 20 $ 36 $ 56 Less - amounts representing interest (4 ) (13 ) (17 ) Lease liabilities $ 13 $ 19 $ 32 (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 September 30, 2019 Right-of-use assets: Operating leases $ 14 Finance leases 442 Total right-of-use assets $ 456 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): Three-Month Period Nine-Month Period Ended September 30, Ended September 30, 2019 2019 Variable $ 113 $ 333 Operating 1 2 Finance: Amortization 3 9 Interest 8 28 Total lease costs $ 125 $ 372 Weighted-average remaining lease term (years): Operating leases 7.7 Finance leases 30.9 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): Nine-Month Period Ended September 30, 2019 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ (2 ) Operating cash flows from finance leases (29 ) Financing cash flows from finance leases (11 ) Right-of-use assets obtained in exchange for lease liabilities: Finance leases $ 8
Operating and Finance Lease, Liability, Maturity [Table Text Block]	Nevada Power has the following remaining lease commitments as of (in millions): September 30, 2019 December 31, 2018 (1) Operating Finance Total Operating Capital Total 2019 $ 1 $ 13 $ 14 $ 3 $ 59 $ 62 2020 3 59 62 3 59 62 2021 3 63 66 3 61 64 2022 2 61 63 3 60 63 2023 2 51 53 2 50 52 Thereafter 9 715 724 10 709 719 Total undiscounted lease payments 20 962 982 $ 24 $ 998 $ 1,022 Less - amounts representing interest (3 ) (508 ) (511 ) Lease liabilities $ 17 $ 454 $ 471 (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 September 30, 2019 Right-of-use assets: Operating leases $ 18 Finance leases 41 Total right-of-use assets $ 59 Lease liabilities: Operating leases $ 18 Finance leases 42 Total lease liabilities $ 60
Lease, Cost [Table Text Block]	The following table summarizes Sierra Pacific's lease costs (in millions): Three-Month Period Nine-Month Period Ended September 30, Ended September 30, 2019 2019 Variable $ 21 $ 51 Operating — 1 Finance: Amortization — 1 Interest 1 2 Total lease costs $ 22 $ 55 Weighted-average remaining lease term (years): Operating leases 26.0 Finance leases 22.1 Weighted-average discount rate: Operating leases 5.0 % Finance leases 7.2 %
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): Nine-Month Period Ended September 30, 2019 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ (2 ) Operating cash flows from finance leases (2 ) Financing cash flows from finance leases (2 ) Right-of-use assets obtained in exchange for lease liabilities: Finance leases $ 5
Operating and Finance Lease, Liability, Maturity [Table Text Block]	Sierra Pacific has the following remaining lease commitments as of (in millions): September 30, 2019 December 31, 2018 (1) Operating Finance Total Operating Capital Total 2019 $ — $ 2 $ 2 $ 2 $ 6 $ 8 2020 2 6 8 2 4 6 2021 2 6 8 2 5 7 2022 1 5 6 1 4 5 2023 1 5 6 1 4 5 Thereafter 27 48 75 28 47 75 Total undiscounted lease payments 33 72 105 $ 36 $ 70 $ 106 Less - amounts representing interest (15 ) (30 ) (45 ) Lease liabilities $ 18 $ 42 $ 60 (1) Amounts included for comparability and accounted for in accordance with ASC Topic 840, "Leases".

Income Taxes (Tables)

Income Taxes (Tables)	9 Months Ended
	Sep. 30, 2019
Schedule of Effective Income Tax Rate Reconciliation [Line Items]
Income Tax Disclosure [Text Block]	Income Taxes 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: Three-Month Periods Nine-Month Periods Ended September 30, Ended September 30, 2019 2018 2019 2018 Federal statutory income tax rate 21 % 21 % 21 % 21 % Income tax credits (43 ) (19 ) (35 ) (29 ) State income tax, net of federal income tax benefit (3 ) 1 (6 ) (6 ) Income tax effect of foreign income (1 ) — (2 ) (3 ) Effects of ratemaking (9 ) (2 ) (5 ) (3 ) Equity income — — — — Other, net (1 ) 1 — 1 Effective income tax rate (36 )% 2 % (27 )% (19 )% Income tax credits relate primarily to production tax credits from wind-powered generating facilities owned by MidAmerican Energy , PacifiCorp and BHE Renewables . Federal renewable electricity production tax credits 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 tax has been computed on a stand-alone basis. Berkshire Hathaway includes the Company in its United States federal and Iowa state income tax returns and the majority of all of its currently payable or receivable income tax is remitted to or received from Berkshire Hathaway . For the nine-month periods ended September 30, 2019 and 2018 , the Company received net cash payments for federal income taxes from Berkshire Hathaway totaling $534 million and $450 million , respectively.
Schedule of Effective Income Tax Rate Reconciliation	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: Three-Month Periods Nine-Month Periods Ended September 30, Ended September 30, 2019 2018 2019 2018 Federal statutory income tax rate 21 % 21 % 21 % 21 % Income tax credits (43 ) (19 ) (35 ) (29 ) State income tax, net of federal income tax benefit (3 ) 1 (6 ) (6 ) Income tax effect of foreign income (1 ) — (2 ) (3 ) Effects of ratemaking (9 ) (2 ) (5 ) (3 ) Equity income — — — — Other, net (1 ) 1 — 1 Effective income tax rate (36 )% 2 % (27 )% (19 )%
Nevada Power Company [Member]
Schedule of Effective Income Tax Rate Reconciliation [Line Items]
Income Tax Disclosure [Text Block]	Income Taxes 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: Three-Month Period Nine-Month Periods Ended September 30, Ended September 30, 2019 2018 2019 2018 Federal statutory income tax rate 21 % 21 % 21 % 21 % Nondeductible expenses — 3 — 3 Effects of ratemaking — 1 — — Other — (1 ) 1 — Effective income tax rate 21 % 24 % 22 % 24 %
Schedule of Effective Income Tax Rate Reconciliation	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: Three-Month Period Nine-Month Periods Ended September 30, Ended September 30, 2019 2018 2019 2018 Federal statutory income tax rate 21 % 21 % 21 % 21 % Nondeductible expenses — 3 — 3 Effects of ratemaking — 1 — — Other — (1 ) 1 — Effective income tax rate 21 % 24 % 22 % 24 %
Sierra Pacific Power Company [Member]
Schedule of Effective Income Tax Rate Reconciliation [Line Items]
Income Tax Disclosure [Text Block]	Income Taxes 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: Three-Month Periods Nine-Month Periods Ended September 30, Ended September 30, 2019 2018 2019 2018 Federal statutory income tax rate 21 % 21 % 21 % 21 % Nondeductible expenses — 5 — 4 Effects of ratemaking — 1 — — Other — — 1 — Effective income tax rate 21 % 27 % 22 % 25 %
Schedule of Effective Income Tax Rate Reconciliation	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: Three-Month Periods Nine-Month Periods Ended September 30, Ended September 30, 2019 2018 2019 2018 Federal statutory income tax rate 21 % 21 % 21 % 21 % Nondeductible expenses — 5 — 4 Effects of ratemaking — 1 — — Other — — 1 — Effective income tax rate 21 % 27 % 22 % 25 %
PacifiCorp [Member]
Schedule of Effective Income Tax Rate Reconciliation [Line Items]
Income Tax Disclosure [Text Block]	Income Taxes 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: Three-Month Periods Nine-Month Periods Ended September 30, Ended September 30, 2019 2018 2019 2018 Federal statutory income tax rate 21 % 21 % 21 % 21 % State income tax, net of federal income tax benefit 3 4 3 4 Federal income tax credits (3 ) (5 ) (4 ) (5 ) Effects of ratemaking (3 ) (4 ) (2 ) (4 ) Amortization of excess deferred income taxes (18 ) — (7 ) — Other (1 ) (1 ) — (2 ) Effective income tax rate (1 )% 15 % 11 % 14 % Income tax credits relate primarily to production tax credits earned by PacifiCorp's wind-powered generating facilities. Federal renewable electricity production tax credits 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 relates primarily to the amortization of $49 million of Oregon's allocated excess deferred income taxes pursuant to the Oregon Renewable Adjustment Clause settlement, whereby a portion of Oregon's allocated excess deferred income taxes was used to accelerate depreciation on Oregon's share of replaced equipment associated with certain repowered wind facilities.
Schedule of Effective Income Tax Rate Reconciliation	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: Three-Month Periods Nine-Month Periods Ended September 30, Ended September 30, 2019 2018 2019 2018 Federal statutory income tax rate 21 % 21 % 21 % 21 % State income tax, net of federal income tax benefit 3 4 3 4 Federal income tax credits (3 ) (5 ) (4 ) (5 ) Effects of ratemaking (3 ) (4 ) (2 ) (4 ) Amortization of excess deferred income taxes (18 ) — (7 ) — Other (1 ) (1 ) — (2 ) Effective income tax rate (1 )% 15 % 11 % 14 %
MidAmerican Energy Company [Member]
Schedule of Effective Income Tax Rate Reconciliation [Line Items]
Income Tax Disclosure [Text Block]	Income Taxes A reconciliation of the federal statutory income tax rate to MidAmerican Energy 's effective income tax rate applicable to income before income tax benefit is as follows: Three-Month Periods Nine-Month Periods Ended September 30, Ended September 30, 2019 2018 2019 2018 Federal statutory income tax rate 21 % 21 % 21 % 21 % Income tax credits (35 ) (95 ) (75 ) (97 ) State income tax, net of federal income tax benefit (18 ) (10 ) (19 ) (9 ) Effects of ratemaking (7 ) (4 ) (7 ) (7 ) Other, net 1 — (1 ) (1 ) Effective income tax rate (38 )% (88 )% (81 )% (93 )% Income tax credits relate primarily to production tax credits from MidAmerican Energy 's wind-powered generating facilities. Federal renewable electricity production tax credits 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. Due to a combination of declines in pre-tax income and increases in production tax credits in recent years and changes in estimates for these values throughout the year, the volatility of the effective tax rate used to determine the recognition of income tax expense each quarter has similarly increased. MidAmerican Energy concluded that, due to such increased volatility, it was no longer able to reasonably estimate an annual effective tax rate for this purpose. Accordingly, beginning January 1, 2019, production tax credits are recognized in the Statement of Operations as they are earned, and excluded in the determination of the effective tax rate used in the recognition of all other income tax expense. Production tax credits recognized in income for the three-month periods ended September 30, 2019 and 2018 were $69 million and $241 million , respectively, with $185 million lower production tax credits recognized attributable to the change in the method of interim period recognition in 2019. Production tax credits recognized in income for the nine-month periods ended September 30, 2019 and 2018 were $259 million and $349 million , respectively, with $129 million lower production tax credits recognized attributable to the change in the method of interim period recognition in 2019. Berkshire Hathaway includes BHE and subsidiaries in its United States federal and Iowa state income tax returns. Consistent with established regulatory practice, MidAmerican Energy 's provision for income tax has been computed on a stand-alone basis, and substantially all of its currently payable or receivable income tax is remitted to or received from BHE . MidAmerican Energy received net cash payments for income tax from BHE totaling $309 million and $232 million for the nine-month periods ended September 30, 2019 and 2018 , respectively.
Schedule of Effective Income Tax Rate Reconciliation	A reconciliation of the federal statutory income tax rate to MidAmerican Energy 's effective income tax rate applicable to income before income tax benefit is as follows: Three-Month Periods Nine-Month Periods Ended September 30, Ended September 30, 2019 2018 2019 2018 Federal statutory income tax rate 21 % 21 % 21 % 21 % Income tax credits (35 ) (95 ) (75 ) (97 ) State income tax, net of federal income tax benefit (18 ) (10 ) (19 ) (9 ) Effects of ratemaking (7 ) (4 ) (7 ) (7 ) Other, net 1 — (1 ) (1 ) Effective income tax rate (38 )% (88 )% (81 )% (93 )%
MidAmerican Funding, LLC and Subsidiaries [Domain]
Schedule of Effective Income Tax Rate Reconciliation [Line Items]
Income Tax Disclosure [Text Block]	Income Taxes A reconciliation of the federal statutory income tax rate to MidAmerican Funding 's effective income tax rate applicable to income before income tax benefit is as follows: Three-Month Periods Nine-Month Periods Ended September 30, Ended September 30, 2019 2018 2019 2018 Federal statutory income tax rate 21 % 21 % 21 % 21 % Income tax credits (36 ) (97 ) (78 ) (101 ) State income tax, net of federal income tax benefit (18 ) (10 ) (20 ) (10 ) Effects of ratemaking (7 ) (5 ) (7 ) (7 ) Other, net — — (1 ) — Effective income tax rate (40 )% (91 )% (85 )% (97 )% Income tax credits relate primarily to production tax credits from MidAmerican Energy's wind-powered generating facilities. Federal renewable electricity production tax credits 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. Due to a combination of declines in pre-tax income and increases in production tax credits in recent years and changes in estimates for these values throughout the year, the volatility of the effective tax rate used to determine the recognition of income tax expense each quarter has similarly increased. MidAmerican Energy concluded that, due to such increased volatility, it was no longer able to reasonably estimate an annual effective tax rate for this purpose. Accordingly, beginning January 1, 2019, production tax credits are recognized in the Statement of Operations as they are earned, and excluded in the determination of the effective tax rate used in the recognition of all other income tax expense. Production tax credits recognized in income for the three-month periods ended September 30, 2019 and 2018 were $69 million and $241 million , respectively, with $185 million lower production tax credits recognized attributable to the change in the method of interim period recognition in 2019. Production tax credits recognized in income for the nine-month periods ended September 30, 2019 and 2018 were $259 million and $349 million , respectively, with $129 million lower production tax credits recognized attributable to the change in the method of interim period recognition in 2019. Berkshire Hathaway includes BHE and subsidiaries in its United States federal and Iowa state income tax returns. Consistent with established regulatory practice, MidAmerican Funding 's and MidAmerican Energy's provisions for income tax have been computed on a stand-alone basis, and substantially all of their currently payable or receivable income tax is remitted to or received from BHE . MidAmerican Funding received net cash payments for income tax from BHE totaling $313 million and $248 million for the nine-month period ended September 30, 2019 and 2018 , respectively.
Schedule of Effective Income Tax Rate Reconciliation	A reconciliation of the federal statutory income tax rate to MidAmerican Funding 's effective income tax rate applicable to income before income tax benefit is as follows: Three-Month Periods Nine-Month Periods Ended September 30, Ended September 30, 2019 2018 2019 2018 Federal statutory income tax rate 21 % 21 % 21 % 21 % Income tax credits (36 ) (97 ) (78 ) (101 ) State income tax, net of federal income tax benefit (18 ) (10 ) (20 ) (10 ) Effects of ratemaking (7 ) (5 ) (7 ) (7 ) Other, net — — (1 ) — Effective income tax rate (40 )% (91 )% (85 )% (97 )%

Employee Benefit Plans (Tables)

Employee Benefit Plans (Tables)	9 Months Ended
	Sep. 30, 2019
Defined Benefit Plan Disclosure [Line Items]
Schedule of Defined Benefit Plans Disclosures	Domestic Operations Net periodic benefit cost (credit) for the domestic pension and other postretirement benefit plans included the following components (in millions): Three-Month Periods Nine-Month Periods Ended September 30, Ended September 30, 2019 2018 2019 2018 Pension: Service cost $ 4 $ 5 $ 12 $ 15 Interest cost 27 26 82 78 Expected return on plan assets (38 ) (41 ) (115 ) (123 ) Net amortization 8 8 24 23 Net periodic benefit cost (credit) $ 1 $ (2 ) $ 3 $ (7 ) Other postretirement: Service cost $ 1 $ 1 $ 6 $ 6 Interest cost 6 7 20 19 Expected return on plan assets (10 ) (9 ) (30 ) (31 ) Net amortization — (3 ) (3 ) (9 ) Net periodic benefit credit $ (3 ) $ (4 ) $ (7 ) $ (15 ) Foreign Operations Net periodic benefit cost for the United Kingdom pension plan included the following components (in millions): Three-Month Periods Nine-Month Periods Ended September 30, Ended September 30, 2019 2018 2019 2018 Service cost $ 3 $ 5 $ 11 $ 15 Interest cost 13 14 39 42 Expected return on plan assets (24 ) (25 ) (74 ) (78 ) Settlement 21 12 21 36 Net amortization 9 9 27 38 Net periodic benefit cost $ 22 $ 15 $ 24 $ 53
PacifiCorp [Member]
Defined Benefit Plan Disclosure [Line Items]
Schedule of Defined Benefit Plans Disclosures	Net periodic benefit credit for the pension and other postretirement benefit plans included the following components (in millions): Three-Month Periods Nine-Month Periods Ended September 30, Ended September 30, 2019 2018 2019 2018 Pension: Service cost $ — $ — $ — $ — Interest cost 11 11 33 32 Expected return on plan assets (17 ) (18 ) (50 ) (54 ) Net amortization 3 3 9 10 Net periodic benefit credit $ (3 ) $ (4 ) (8 ) (12 ) Other postretirement: Service cost $ — $ — $ 1 $ 1 Interest cost 3 3 9 9 Expected return on plan assets (6 ) (5 ) (16 ) (16 ) Net amortization 1 (1 ) 1 (4 ) Net periodic benefit credit $ (2 ) $ (3 ) (5 ) (10 )
MidAmerican Energy Company [Member]
Defined Benefit Plan Disclosure [Line Items]
Schedule of Defined Benefit Plans Disclosures	Net periodic benefit credit for the plans of MidAmerican Energy and the aforementioned affiliates included the following components (in millions): Three-Month Periods Nine-Month Periods Ended September 30, Ended September 30, 2019 2018 2019 2018 Pension: Service cost $ 2 $ 2 $ 5 $ 6 Interest cost 7 7 22 21 Expected return on plan assets (10 ) (11 ) (31 ) (33 ) Net amortization — 1 — 2 Net periodic benefit credit $ (1 ) $ (1 ) $ (4 ) $ (4 ) Other postretirement: Service cost $ 1 $ 1 $ 4 $ 4 Interest cost 2 2 7 6 Expected return on plan assets (3 ) (3 ) (9 ) (10 ) Net amortization (1 ) (1 ) (3 ) (3 ) Net periodic benefit credit $ (1 ) $ (1 ) $ (1 ) $ (3 )
Nevada Power Company [Member]
Defined Benefit Plan Disclosure [Line Items]
Schedule of Amounts Recognized in Balance Sheet	Amounts payable to NV Energy are included on the Consolidated Balance Sheets and consist of the following (in millions): As of September 30, December 31, 2019 2018 Qualified Pension Plan: Other long-term liabilities $ 26 $ 26 Non-Qualified Pension Plans: Other current liabilities 1 1 Other long-term liabilities 9 9 Other Postretirement Plans: Other long-term liabilities 1 1
Sierra Pacific Power Company [Member]
Defined Benefit Plan Disclosure [Line Items]
Schedule of Amounts Recognized in Balance Sheet	Amounts payable to NV Energy are included on the Balance Sheets and consist of the following (in millions): As of September 30, December 31, 2019 2018 Qualified Pension Plan: Other long-term liabilities $ 18 $ 19 Non-Qualified Pension Plans: Other current liabilities 1 1 Other long-term liabilities 7 7 Other Postretirement Plans: Other long-term liabilities 13 13

Asset Retirement Obligation A_2

Asset Retirement Obligation Asset Retirement Obligations (Tables)	9 Months Ended
	Sep. 30, 2019
Asset Retirement Obligations Disclosure [Line Items]
Schedule of Change in Asset Retirement Obligation [Table Text Block]	Asset Retirement Obligations 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 Energy Company [Member]
Asset Retirement Obligations Disclosure [Line Items]
Schedule of Change in Asset Retirement Obligation [Table Text Block]	The following table reconciles the beginning and ending balances of MidAmerican Energy's ARO liabilities for the nine-month period ended September 30, 2019 (in millions): Beginning balance $ 562 Change in estimated costs 237 Additions 5 Retirements (2 ) Accretion 22 Ending balance $ 824

Risk Management and Hedging A_2

Risk Management and Hedging Activities (Tables) - PacifiCorp [Member]	9 Months Ended
	Sep. 30, 2019
Derivative [Line Items]
Schedule of Derivative Instruments in Statement of Financial Position, Fair Value	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 September 30, 2019 Not designated as hedging contracts (1) : Commodity assets $ 7 $ 1 $ 4 $ 1 $ 13 Commodity liabilities (2 ) — (34 ) (59 ) (95 ) Total 5 1 (30 ) (58 ) (82 ) Total derivatives 5 1 (30 ) (58 ) (82 ) Cash collateral receivable — — 20 34 54 Total derivatives - net basis $ 5 $ 1 $ (10 ) $ (24 ) $ (28 ) 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 September 30, 2019 and December 31, 2018 , a regulatory asset of $81 million and $96 million , respectively, was recorded related to the net derivative liability of $82 million and $97 million , respectively.
Schedule of Regulatory Assets (Liabilities), Net, Unrealized Loss (Gain), Net, on Derivative Contracts	The following table reconciles the beginning and ending balances of PacifiCorp's net regulatory assets and summarizes the pre-tax gains and losses on commodity derivative contracts recognized in net regulatory assets, as well as amounts reclassified to earnings (in millions): Three-Month Periods Nine-Month Periods Ended September 30, Ended September 30, 2019 2018 2019 2018 Beginning balance $ 101 $ 116 $ 96 $ 101 Changes in fair value 16 14 (12 ) 48 Net losses reclassified to operating revenue (11 ) (36 ) (27 ) (30 ) Net (losses) gains reclassified to cost of fuel and energy (25 ) 8 24 (17 ) Ending balance $ 81 $ 102 $ 81 $ 102
Schedule of Notional Amounts of Outstanding Derivative Positions	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 (in millions): Unit of September 30, December 31, Measure 2019 2018 Electricity sales, net Megawatt hours (3 ) (6 ) Natural gas purchases Decatherms 108 117

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	9 Months Ended
	Sep. 30, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis	The following table presents the Company's financial 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 September 30, 2019 Assets: Commodity derivatives $ — $ 36 $ 103 $ (25 ) $ 114 Interest rate derivatives — 7 23 — 30 Mortgage loans held for sale — 1,060 — — 1,060 Money market mutual funds (2) 837 — — — 837 Debt securities: United States government obligations 189 — — — 189 International government obligations — 5 — — 5 Corporate obligations — 57 — — 57 Municipal obligations — 1 — — 1 Agency, asset and mortgage-backed obligations — 1 — — 1 Equity securities: United States companies 309 — — — 309 International companies 1,132 — — — 1,132 Investment funds 182 — — — 182 $ 2,649 $ 1,167 $ 126 $ (25 ) $ 3,917 Liabilities: Commodity derivatives $ (3 ) $ (142 ) $ (25 ) $ 101 $ (69 ) Interest rate derivatives (3 ) (21 ) (3 ) — (27 ) $ (6 ) $ (163 ) $ (28 ) $ 101 $ (96 ) Input Levels for Fair Value Measurements Level 1 Level 2 Level 3 Other (1) Total 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 $76 million and $59 million as of September 30, 2019 and December 31, 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 Assets and Liabilities Net Measured On Recurring Basis Unobservable Input Reconciliation	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 (in millions): Three-Month Periods Nine-Month Periods Ended September 30, Ended September 30, Interest Interest Commodity Rate Commodity Rate Derivatives Derivatives Derivatives Derivatives 2019: Beginning balance $ 86 $ 23 $ 99 $ 10 Changes included in earnings 1 158 6 305 Changes in fair value recognized in OCI — — (1 ) — Changes in fair value recognized in net regulatory assets (17 ) — (40 ) — Purchases — — 4 — Settlements 8 (161 ) 10 (295 ) Ending balance $ 78 $ 20 $ 78 $ 20 2018: Beginning balance $ 83 $ 17 $ 94 $ 9 Changes included in earnings (1 ) 54 3 140 Changes in fair value recognized in OCI 1 — 1 — Changes in fair value recognized in net regulatory assets 3 — (11 ) — Purchases 1 — 2 — Settlements (3 ) (61 ) (5 ) (139 ) Ending balance $ 84 $ 10 $ 84 $ 10
Fair Value, by Balance Sheet Grouping	The following table presents the carrying value and estimated fair value of the Company's long-term debt (in millions): As of September 30, 2019 As of December 31, 2018 Carrying Fair Carrying Fair Value Value Value Value Long-term debt $ 37,909 $ 44,979 $ 36,250 $ 38,874
Nevada Power Company [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis	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 September 30, 2019 Assets: Money market mutual funds (1) $ 261 $ — $ — $ 261 Investment funds 2 — — 2 $ 263 $ — $ — $ 263 Liabilities - commodity derivatives $ — $ — $ (18 ) $ (18 ) 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	The following table reconciles the beginning and ending balances of Nevada Power's commodity derivative assets and liabilities measured at fair value on a recurring basis using significant Level 3 inputs (in millions): Three-Month Periods Nine-Month Periods Ended September 30, Ended September 30, 2019 2018 2019 2018 Beginning balance $ (11 ) $ (9 ) $ 3 $ (3 ) Changes in fair value recognized in regulatory assets (13 ) 2 (30 ) (6 ) Settlements 6 — 9 2 Ending balance $ (18 ) $ (7 ) $ (18 ) $ (7 )
Fair Value, by Balance Sheet Grouping	The following table presents the carrying value and estimated fair value of Nevada Power's long‑term debt (in millions): As of September 30, 2019 As of December 31, 2018 Carrying Fair Carrying Fair Value Value Value Value Long-term debt $ 2,350 $ 2,891 $ 2,353 $ 2,651
PacifiCorp [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis	The following table presents PacifiCorp's financial 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 September 30, 2019 Assets: Commodity derivatives $ — $ 13 $ — $ (7 ) $ 6 Money market mutual funds (2) 322 — — — 322 Investment funds 25 — — — 25 $ 347 $ 13 $ — $ (7 ) $ 353 Liabilities - Commodity derivatives $ — $ (95 ) $ — $ 61 $ (34 ) 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 $54 million and $59 million as of September 30, 2019 and December 31, 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	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 (in millions): As of September 30, 2019 As of December 31, 2018 Carrying Fair Carrying Fair Value Value Value Value Long-term debt $ 7,657 $ 9,392 $ 7,015 $ 7,833
MidAmerican Energy Company [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis	The following table presents MidAmerican Energy's financial 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 September 30, 2019: Assets: Commodity derivatives $ — $ 4 $ — $ (1 ) $ 3 Money market mutual funds (2) 3 — — — 3 Debt securities: United States government obligations 189 — — — 189 International government obligations — 5 — — 5 Corporate obligations — 57 — — 57 Municipal obligations — 1 — — 1 Agency, asset and mortgage-backed obligations — 1 — — 1 Equity securities: United States companies 309 — — — 309 International companies 8 — — — 8 Investment funds 19 — — — 19 $ 528 $ 68 $ — $ (1 ) $ 595 Liabilities - commodity derivatives $ — $ (8 ) $ — $ 2 $ (6 ) Input Levels for Fair Value Measurements Level 1 Level 2 Level 3 Other (1) Total 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 ) (1) Represents netting under master netting arrangements and a net cash collateral receivable of $1 million and $- million as of September 30, 2019 and December 31, 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.
Fair Value, by Balance Sheet Grouping	MidAmerican Energy's long-term debt is carried at cost on the Balance Sheets. 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 (in millions): As of September 30, 2019 As of December 31, 2018 Carrying Value Fair Value Carrying Value Fair Value Long-term debt $ 6,342 $ 7,519 $ 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	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 (in millions): As of September 30, 2019 As of December 31, 2018 Carrying Value Fair Value Carrying Value Fair Value Long-term debt $ 6,582 $ 7,840 $ 5,619 $ 5,941
Sierra Pacific Power Company [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis	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 September 30, 2019 Assets - money market mutual funds (1) $ 56 $ — $ — $ 56 Liabilities - commodity derivatives $ — $ — $ (4 ) $ (4 ) 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	The following table presents the carrying value and estimated fair value of Sierra Pacific's long-term debt (in millions): As of September 30, 2019 As of December 31, 2018 Carrying Fair Carrying Fair Value Value Value Value Long-term debt $ 1,135 $ 1,270 $ 1,120 $ 1,167

Revenue from Contracts with C_2

Revenue from Contracts with Customers Revenue from Contracts with Customers (Tables)	9 Months Ended
	Sep. 30, 2019
Disaggregation of Revenue [Line Items]
Disaggregation of Revenue [Table Text Block]	Energy Products and Services The following table summarizes the Company's energy products and services revenue from contracts with customers ("Customer 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 14 (in millions): For the Three-Month Period Ended September 30, 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 $ 1,320 $ 651 $ 998 $ — $ — $ — $ — $ (1 ) $ 2,968 Retail gas — 61 16 — — — — — 77 Wholesale 8 56 6 — — — — (1 ) 69 Transmission and distribution 26 16 27 195 — 179 — — 443 Interstate pipeline — — — — 221 — — (25 ) 196 Other — — — — — — — — — Total Regulated 1,354 784 1,047 195 221 179 — (27 ) 3,753 Nonregulated — 9 — 9 — 5 276 161 460 Total Customer Revenue 1,354 793 1,047 204 221 184 276 134 4,213 Other revenue 13 4 7 26 5 — 53 16 124 Total $ 1,367 $ 797 $ 1,054 $ 230 $ 226 $ 184 $ 329 $ 150 $ 4,337 For the Nine-Month Period Ended September 30, 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 $ 3,613 $ 1,561 $ 2,183 $ — $ — $ — $ — $ (1 ) $ 7,356 Retail gas — 416 74 — — — — — 490 Wholesale 47 232 34 — — — — (2 ) 311 Transmission and distribution 76 47 75 634 — 514 — — 1,346 Interstate pipeline — — — — 805 — — (86 ) 719 Other — — 1 — — — — — 1 Total Regulated 3,736 2,256 2,367 634 805 514 — (89 ) 10,223 Nonregulated — 25 — 27 — 13 599 442 1,106 Total Customer Revenue 3,736 2,281 2,367 661 805 527 599 353 11,329 Other revenue 57 18 22 75 4 — 146 78 400 Total $ 3,793 $ 2,299 $ 2,389 $ 736 $ 809 $ 527 $ 745 $ 431 $ 11,729 For the Three-Month Period Ended September 30, 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 $ 1,323 $ 647 $ 1,002 $ — $ — $ — $ — $ (1 ) $ 2,971 Retail gas — 83 13 — — — — — 96 Wholesale (2) (10 ) 82 9 — — — — (1 ) 80 Transmission and distribution 30 14 28 196 — 171 — — 439 Interstate pipeline — — — — 283 — — (25 ) 258 Other — — — — — — — — — Total Regulated 1,343 826 1,052 196 283 171 — (27 ) 3,844 Nonregulated — 2 — 10 — 3 235 176 426 Total Customer Revenue 1,343 828 1,052 206 283 174 235 149 4,270 Other revenue (3) 26 4 7 27 (24 ) — 85 24 149 Total $ 1,369 $ 832 $ 1,059 $ 233 $ 259 $ 174 $ 320 $ 173 $ 4,419 For the Nine-Month Period Ended September 30, 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 $ 3,534 $ 1,538 $ 2,232 $ — $ — $ — $ — $ (1 ) $ 7,303 Retail gas — 428 72 — — — — — 500 Wholesale 21 262 26 — — — — (3 ) 306 Transmission and distribution 82 44 73 661 — 525 — — 1,385 Interstate pipeline — — — — 893 — — (91 ) 802 Other — — 1 — — — — — 1 Total Regulated 3,637 2,272 2,404 661 893 525 — (95 ) 10,297 Nonregulated — 7 1 31 — 6 538 478 1,061 Total Customer Revenue 3,637 2,279 2,405 692 893 531 538 383 11,358 Other revenue (3) 109 18 21 65 (22 ) — 182 87 460 Total $ 3,746 $ 2,297 $ 2,426 $ 757 $ 871 $ 531 $ 720 $ 470 $ 11,818
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table Text Block]	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 September 30, 2019 , by reportable segment (in millions):
HomeServices [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of Revenue [Table Text Block]	The following table summarizes the Company's real estate services Customer Revenue by line of business (in millions): HomeServices Three-Month Periods Nine-Month Periods Ended September 30, Ended September 30, 2019 2018 2019 2018 Customer Revenue: Brokerage $ 1,172 $ 1,122 $ 3,087 $ 2,975 Franchise 20 18 53 52 Total Customer Revenue 1,192 1,140 3,140 3,027 Other revenue 115 78 279 225 Total $ 1,307 $ 1,218 $ 3,419 $ 3,252
PacifiCorp [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of Revenue [Table Text Block]	The following table summarizes PacifiCorp's revenue from contracts with customers ("Customer Revenue") by customer class (in millions): Three-Month Periods Nine-Month Periods Ended September 30, Ended September 30, 2019 2018 2019 2018 Customer Revenue: Retail: Residential $ 478 $ 478 $ 1,316 $ 1,284 Commercial 419 418 1,152 1,129 Industrial 306 305 887 862 Other retail 100 106 203 204 Total retail 1,303 1,307 3,558 3,479 Wholesale (1) 8 (10 ) 47 21 Transmission 26 30 76 82 Other Customer Revenue 17 16 55 55 Total Customer Revenue 1,354 1,343 3,736 3,637 Other revenue 13 26 57 109 Total operating revenue $ 1,367 $ 1,369 $ 3,793 $ 3,746
Nevada Power Company [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of Revenue [Table Text Block]	The following table summarizes Nevada Power's revenue from contracts with customers ("Customer Revenue") by customer class (in millions): Three-Month Periods Nine-Month Periods Ended September 30, Ended September 30, 2019 2018 2019 2018 Customer Revenue: Retail: Residential $ 468 $ 484 $ 934 $ 989 Commercial 142 135 346 340 Industrial 169 164 351 351 Other 4 7 15 18 Total fully bundled 783 790 1,646 1,698 Distribution only service 9 9 24 24 Total retail 792 799 1,670 1,722 Wholesale, transmission and other 8 15 39 38 Total Customer Revenue 800 814 1,709 1,760 Other revenue 6 6 19 17 Total revenue $ 806 $ 820 $ 1,728 $ 1,777
Sierra Pacific Power Company [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of Revenue [Table Text Block]	The following table summarizes Sierra Pacific's revenue from contracts with customers ("Customer Revenue") by customer class, including a reconciliation to Sierra Pacific's reportable segment information included in Note 12 (in millions): Three-Month Periods Ended September 30, 2019 2018 Electric Gas Total Electric Gas Total Customer Revenue: Retail: Residential $ 75 $ 11 $ 86 $ 76 $ 9 $ 85 Commercial 80 3 83 75 3 78 Industrial 58 1 59 59 1 60 Other 2 — 2 2 — 2 Total fully bundled 215 15 230 212 13 225 Distribution only service 1 — 1 1 — 1 Total retail 216 15 231 213 13 226 Wholesale, transmission and other 16 — 16 12 1 13 Total Customer Revenue 232 15 247 225 14 239 Other revenue — 1 1 — — — Total revenue $ 232 $ 16 $ 248 $ 225 $ 14 $ 239 Nine-Month Periods Ended September 30, 2019 2018 Electric Gas Total Electric Gas Total Customer Revenue: Retail: Residential $ 201 $ 49 $ 250 $ 203 $ 48 $ 251 Commercial 188 18 206 190 18 208 Industrial 143 6 149 136 6 142 Other 5 — 5 5 — 5 Total fully bundled 537 73 610 534 72 606 Distribution only service 3 — 3 3 — 3 Total retail 540 73 613 537 72 609 Wholesale, transmission and other 44 — 44 35 1 36 Total Customer Revenue 584 73 657 572 73 645 Other revenue 2 2 4 3 1 4 Total revenue $ 586 $ 75 $ 661 $ 575 $ 74 $ 649
MidAmerican Energy Company [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of Revenue [Table Text Block]	The following table summarizes MidAmerican Energy's revenue from contracts with customers ("Customer Revenue") by line of business and customer class, including a reconciliation to MidAmerican Energy's reportable segment information included in Note 12 , (in millions): For the Three-Month Periods Ended September 30, 2019 2018 Electric Natural Gas Other Total Electric Natural Gas Other Total Customer Revenue: Retail: Residential $ 228 $ 41 $ — $ 269 $ 233 $ 54 $ — $ 287 Commercial 101 10 — 111 100 17 — 117 Industrial 274 3 — 277 268 3 — 271 Natural gas transportation services — 7 — 7 — 8 — 8 Other retail (1) 48 — — 48 46 1 — 47 Total retail 651 61 — 712 647 83 — 730 Wholesale 41 15 — 56 62 20 — 82 Multi-value transmission projects 17 — — 17 14 — — 14 Other Customer Revenue — — 8 8 — — 2 2 Total Customer Revenue 709 76 8 793 723 103 2 828 Other revenue 3 — — 3 4 — — 4 Total operating revenue $ 712 $ 76 $ 8 $ 796 $ 727 $ 103 $ 2 $ 832 For the Nine-Month Periods Ended September 30, 2019 2018 Electric Natural Gas Other Total Electric Natural Gas Other Total Customer Revenue: Retail: Residential $ 547 $ 282 $ — $ 829 $ 567 $ 287 $ — $ 854 Commercial 255 95 — 350 251 100 — 351 Industrial 641 12 — 653 608 13 — 621 Natural gas transportation services — 27 — 27 — 27 — 27 Other retail (1) 118 — — 118 113 1 — 114 Total retail 1,561 416 — 1,977 1,539 428 — 1,967 Wholesale 168 64 — 232 187 75 — 262 Multi-value transmission projects 47 — — 47 43 — — 43 Other Customer Revenue — — 23 23 — — 5 5 Total Customer Revenue 1,776 480 23 2,279 1,769 503 5 2,277 Other revenue 16 2 — 18 16 2 — 18 Total operating revenue $ 1,792 $ 482 $ 23 $ 2,297 $ 1,785 $ 505 $ 5 $ 2,295

Components of Accumulated Oth_2

Components of Accumulated Other Comprehensive Loss, Net (Tables)	9 Months Ended
	Sep. 30, 2019
Accumulated Other Comprehensive Income (Loss) [Line Items]
Components of Accumulated Other Comprehensive Loss, Net	The following table shows the change in AOCI attributable to BHE shareholders by each component of OCI, net of applicable income tax (in millions): Unrecognized Foreign Unrealized Unrealized AOCI Amounts on Currency Gains on Gains (Losses) Attributable Retirement Translation Marketable on Cash To BHE Benefits Adjustment Securities Flow Hedges Shareholders, Net Balance, December 31, 2017 $ (383 ) $ (1,129 ) $ 1,085 $ 29 $ (398 ) Adoption of ASU 2016-01 — — (1,085 ) — (1,085 ) Other comprehensive income (loss) 50 (236 ) — 2 (184 ) Balance, September 30, 2018 $ (333 ) $ (1,365 ) $ — $ 31 $ (1,667 ) Balance, December 31, 2018 $ (358 ) $ (1,623 ) $ — $ 36 $ (1,945 ) Other comprehensive loss (40 ) (66 ) — (28 ) (134 ) Balance, September 30, 2019 $ (398 ) $ (1,689 ) $ — $ 8 $ (2,079 )

Segment Information (Tables)

Segment Information (Tables)	9 Months Ended
	Sep. 30, 2019
Segment Reporting Information [Line Items]
Schedule of Segment Reporting Information, by Segment	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): Three-Month Periods Nine-Month Periods Ended September 30, Ended September 30, 2019 2018 2019 2018 Operating revenue: PacifiCorp $ 1,367 $ 1,369 $ 3,793 $ 3,746 MidAmerican Funding 797 832 2,299 2,297 NV Energy 1,054 1,059 2,389 2,426 Northern Powergrid 230 233 736 757 BHE Pipeline Group 226 259 809 871 BHE Transmission 184 174 527 531 BHE Renewables 329 320 745 720 HomeServices 1,307 1,218 3,419 3,252 BHE and Other (1) 150 173 431 470 Total operating revenue $ 5,644 $ 5,637 $ 15,148 $ 15,070 Depreciation and amortization: PacifiCorp $ 272 $ 203 $ 686 $ 602 MidAmerican Funding 184 133 540 499 NV Energy 121 114 361 341 Northern Powergrid 60 62 186 189 BHE Pipeline Group 28 27 85 99 BHE Transmission 59 61 177 184 BHE Renewables 71 68 210 198 HomeServices 11 14 35 37 BHE and Other (1) — (1 ) (2 ) (2 ) Total depreciation and amortization $ 806 $ 681 $ 2,278 $ 2,147 Three-Month Periods Nine-Month Periods Ended September 30, Ended September 30, 2019 2018 2019 2018 Operating income: PacifiCorp $ 333 $ 386 $ 885 $ 917 MidAmerican Funding 234 278 444 444 NV Energy 313 307 547 540 Northern Powergrid 98 102 337 360 BHE Pipeline Group 87 105 398 388 BHE Transmission 91 82 244 244 BHE Renewables 183 176 298 308 HomeServices 113 85 209 185 BHE and Other (1) (2 ) 2 (34 ) (20 ) Total operating income 1,450 1,523 3,328 3,366 Interest expense (475 ) (453 ) (1,428 ) (1,380 ) Capitalized interest 23 17 56 44 Allowance for equity funds 56 30 126 75 Interest and dividend income 25 27 91 85 (Losses) gains on marketable securities, net (234 ) 260 (296 ) (336 ) Other, net 2 19 67 50 Total income before income tax expense and equity income $ 847 $ 1,423 $ 1,944 $ 1,904 Interest expense: PacifiCorp $ 101 $ 96 $ 299 $ 288 MidAmerican Funding 74 61 223 185 NV Energy 55 52 173 169 Northern Powergrid 33 34 102 107 BHE Pipeline Group 14 11 38 31 BHE Transmission 40 42 118 127 BHE Renewables 44 49 132 150 HomeServices 6 6 20 16 BHE and Other (1) 108 102 323 307 Total interest expense $ 475 $ 453 $ 1,428 $ 1,380 Operating revenue by country: United States $ 5,222 $ 5,209 $ 13,875 $ 13,757 United Kingdom 229 232 734 754 Canada 183 174 526 531 Philippines and other 10 22 13 28 Total operating revenue by country $ 5,644 $ 5,637 $ 15,148 $ 15,070 Income before income tax benefit and equity income (loss) by country: United States $ 728 $ 1,290 $ 1,546 $ 1,501 United Kingdom 49 59 228 220 Canada 55 43 134 125 Philippines and other 15 31 36 58 Total income before income tax benefit and equity income (loss) by country $ 847 $ 1,423 $ 1,944 $ 1,904 As of September 30, December 31, 2019 2018 Assets: PacifiCorp $ 24,789 $ 23,478 MidAmerican Funding 21,806 20,029 NV Energy 14,477 14,119 Northern Powergrid 7,334 7,427 BHE Pipeline Group 5,775 5,511 BHE Transmission 8,692 8,424 BHE Renewables 9,650 8,666 HomeServices 3,971 2,797 BHE and Other (1) 1,419 1,738 Total assets $ 97,913 $ 92,189 (1) The differences between the reportable segment amounts and the consolidated amounts, described as BHE and Other , relate principally to other entities, corporate functions and intersegment eliminations. T
Schedule of Goodwill	e following table shows the change in the carrying amount of goodwill by reportable segment for the nine-month period ended September 30, 2019 (in millions): BHE Pipeline Group PacifiCorp MidAmerican Funding NV Energy Northern Powergrid BHE Transmission BHE Renewables HomeServices Total December 31, 2018 $ 1,129 $ 2,102 $ 2,369 $ 952 $ 73 $ 1,448 $ 95 $ 1,427 $ 9,595 Acquisitions — — — — — — — 30 30 Foreign currency translation — — — (26 ) — 44 — — 18 September 30, 2019 $ 1,129 $ 2,102 $ 2,369 $ 926 $ 73 $ 1,492 $ 95 $ 1,457 $ 9,643
MidAmerican Energy Company [Member]
Segment Reporting Information [Line Items]
Schedule of Segment Reporting Information, by Segment	The following tables provide information on a reportable segment basis (in millions): Three-Month Periods Nine-Month Periods Ended September 30, Ended September 30, 2019 2018 2019 2018 Operating revenue: Regulated electric $ 712 $ 727 $ 1,792 $ 1,785 Regulated natural gas 76 103 482 505 Other 8 2 23 5 Total operating revenue $ 796 $ 832 $ 2,297 $ 2,295 Operating income: Regulated electric $ 243 $ 278 $ 396 $ 392 Regulated natural gas (8 ) 1 45 52 Other (1 ) (1 ) 2 — Total operating income 234 278 443 444 Interest expense (68 ) (56 ) (207 ) (170 ) Allowance for borrowed funds 7 6 20 14 Allowance for equity funds 27 16 59 39 Other, net 4 13 34 34 Income before income tax benefit $ 204 $ 257 $ 349 $ 361 As of September 30, December 31, Assets: Regulated electric $ 18,341 $ 16,511 Regulated natural gas 1,343 1,406 Other 10 3 Total assets $ 19,694 $ 17,920
MidAmerican Funding, LLC and Subsidiaries [Domain]
Segment Reporting Information [Line Items]
Schedule of Segment Reporting Information, by Segment	The following tables provide information on a reportable segment basis (in millions): Three-Month Periods Nine-Month Periods Ended September 30, Ended September 30, 2019 2018 2019 2018 Operating revenue: Regulated electric $ 712 $ 727 $ 1,792 $ 1,785 Regulated natural gas 76 103 482 505 Other 9 2 25 7 Total operating revenue $ 797 $ 832 $ 2,299 $ 2,297 Operating income: Regulated electric $ 243 $ 278 $ 396 $ 392 Regulated natural gas (8 ) 1 45 52 Other (1 ) (1 ) 3 — Total operating income 234 278 444 444 Interest expense (74 ) (61 ) (223 ) (185 ) Allowance for borrowed funds 7 6 20 14 Allowance for equity funds 27 16 59 39 Other, net 5 12 36 35 Income before income tax benefit $ 199 $ 251 $ 336 $ 347 As of September 30, December 31, Assets (1) : Regulated electric $ 19,532 $ 17,702 Regulated natural gas 1,422 1,485 Other 25 15 Total assets $ 20,979 $ 19,202 (1) Assets by reportable segment reflect the assignment of goodwill to applicable reporting units.
Sierra Pacific Power Company [Member]
Segment Reporting Information [Line Items]
Schedule of Segment Reporting Information, by Segment	The following tables provide information on a reportable segment basis (in millions): Three-Month Periods Nine-Month Periods Ended September 30, Ended September 30, 2019 2018 2019 2018 Operating revenue: Regulated electric $ 232 $ 225 $ 586 $ 575 Regulated natural gas 16 14 75 74 Total operating revenue $ 248 $ 239 $ 661 $ 649 Operating income: Regulated electric $ 67 $ 56 $ 119 $ 111 Regulated natural gas — — 12 11 Total operating income 67 56 131 122 Interest expense (12 ) (12 ) (36 ) (33 ) Allowance for borrowed funds — — 1 1 Allowance for equity funds — 1 2 3 Other, net 1 3 4 8 Income before income tax expense $ 56 $ 48 $ 102 $ 101 As of September 30, December 31, 2019 2018 Assets: Regulated electric $ 3,282 $ 3,177 Regulated natural gas 304 314 Regulated common assets (1) 82 78 Total assets $ 3,668 $ 3,569 (1) Consists principally of cash and cash equivalents not included in either the regulated electric or regulated natural gas segments.

General (Details)

General (Details)	9 Months Ended
	Sep. 30, 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 interstate natural gas pipeline companies in the United States	2
Number of owned and operated electricity distribution companies in Great Britain	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 residential real estate brokerage franchise networks in the United States	1

Investments and Restricted Ca_3

Investments and Restricted Cash and Investments (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Investments [Abstract]
Investments	$ 1,700		$ 1,700		$ 1,974
Equity Method Investments [Abstract]
Equity Method Investments	3,504		3,504		2,440
Restricted Cash and Investments [Abstract]
Restricted cash and investments	836		836		760
Investments, including equity method investments and restricted cash and investments	6,040		6,040		5,174
Investments, including equity method investments and restricted cash and investments, current	265		265		271
Investments, including equity method investments and restricted cash and investments, noncurrent	5,775		5,775		4,903
Gain on Sale of Investments	(234)	$ 260	(296)	$ (336)
Marketable Securities, Realized Gain (Loss)	2	0	1	1
Marketable Securities, Gain (Loss)	(236)	$ 260	(297)	(337)
Quad Cities Station nuclear decommissioning trust funds [Member]
Restricted Cash and Investments [Abstract]
Decommissioning fund investments, fair value	571		571		504
Other restricted cash and investments [Member]
Restricted Cash and Investments [Abstract]
Restricted cash and investments	265		265		256
Equity Method Investments, tax equity investments [Member]
Equity Method Investments [Abstract]
Equity Method Investments	2,695		2,695		1,661
ETT [Member]
Equity Method Investments [Abstract]
Equity Method Investments	553		553		527
Bridger Coal Company [Member]
Equity Method Investments [Abstract]
Equity Method Investments	83		83		99
Other equity method investments [Member]
Equity Method Investments [Abstract]
Equity Method Investments	173		173		153
BYD Company Limited common stock [Member]
Investments [Abstract]
Available-for-sale securities, equity securities	1,124		1,124		1,435
Rabbi trusts [Member]
Investments [Abstract]
Rabbi trusts, amount	395		395		371
Other investments [Member]
Investments [Abstract]
Other investments	$ 181		$ 181		$ 168
Retained Earnings [Member]
Investments And Restricted Cash And Investments [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification				$ 1,085

Property, Plant and Equipment_3

Property, Plant and Equipment, Net (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2019	Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Property, plant and equipment in service, net	$ 66,011	$ 64,977
Construction in Progress, Gross	5,313	3,110
Property, plant and equipment, net	71,324	68,087
Regulated Operation [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment	86,233	84,231
Accumulated depreciation and amortization	(26,719)	(25,894)
Property, plant and equipment in service, net	59,514	58,337
Construction in Progress, Gross	5,100	2,900
Regulated Operation [Member] | Utility generation, transmission and distribution systems
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 78,596	76,707
Regulated Operation [Member] | Utility generation, transmission and distribution systems | Minimum [Member]
Property, Plant and Equipment [Line Items]
Depreciable Life	5 years
Regulated Operation [Member] | Utility generation, transmission and distribution systems | Maximum [Member]
Property, Plant and Equipment [Line Items]
Depreciable Life	80 years
Regulated Operation [Member] | Interstate natural gas pipeline assets
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 7,637	7,524
Regulated Operation [Member] | Interstate natural gas pipeline assets | Minimum [Member]
Property, Plant and Equipment [Line Items]
Depreciable Life	3 years
Regulated Operation [Member] | Interstate natural gas pipeline assets | Maximum [Member]
Property, Plant and Equipment [Line Items]
Depreciable Life	80 years
Unregulated Operation [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 8,572	8,250
Accumulated depreciation and amortization	(2,075)	(1,610)
Property, plant and equipment in service, net	6,497	6,640
Unregulated Operation [Member] | Independent power plants
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 6,966	6,826
Unregulated Operation [Member] | Independent power plants | Minimum [Member]
Property, Plant and Equipment [Line Items]
Depreciable Life	5 years
Unregulated Operation [Member] | Independent power plants | Maximum [Member]
Property, Plant and Equipment [Line Items]
Depreciable Life	30 years
Unregulated Operation [Member] | Other assets
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 1,606	$ 1,424
Unregulated Operation [Member] | Other assets | Minimum [Member]
Property, Plant and Equipment [Line Items]
Depreciable Life	3 years
Unregulated Operation [Member] | Other assets | Maximum [Member]
Property, Plant and Equipment [Line Items]
Depreciable Life	30 years

Property, Plant and Equipment_4

Property, Plant and Equipment, Net - PacifiCorp (Details) - PacifiCorp [Member] - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2019	Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Electric Property Plant And Equipment In Service Gross	$ 28,690	$ 28,399
Public utility accumulated depreciation and amortization	(10,069)	(10,034)
Public Utilities Property, Plant And Equipment In Service, Net	18,621	18,365
Public Utilities, Property, Plant and Equipment, Net, Excluding Construction Work In Progress	18,631	18,375
Public Utilities, Property, Plant and Equipment, Construction Work in Progress	1,977	1,195
Public Utilities, Property, Plant and Equipment, Net	$ 20,608	19,570
Minimum [Member]
Property, Plant and Equipment [Line Items]
Depreciable Life	5 years
Maximum [Member]
Property, Plant and Equipment [Line Items]
Depreciable Life	75 years
Other assets
Property, Plant and Equipment [Line Items]
Electric Property Plant And Equipment In Service Gross	$ 1,429	1,436
Electricity Generation Plant, Non-Nuclear [Member]
Property, Plant and Equipment [Line Items]
Electric Property Plant And Equipment In Service Gross	12,574	12,606
Electric Transmission [Member]
Property, Plant and Equipment [Line Items]
Electric Property Plant And Equipment In Service Gross	6,468	6,357
Electric Distribution [Member]
Property, Plant and Equipment [Line Items]
Electric Property Plant And Equipment In Service Gross	7,217	7,030
Other Intangible Assets [Member]
Property, Plant and Equipment [Line Items]
Electric Property Plant And Equipment In Service Gross	1,002	970
Unregulated Operation [Member]
Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Net, Excluding Construction Work In Progress	$ 10	$ 10

Property, Plant and Equipment_5

Property, Plant and Equipment, Net Property, Plant and Equipment, Net - MEC (Details) - MidAmerican Energy Company [Member] - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2019	Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Net, Excluding Construction Work In Progress	$ 15,781	$ 15,122
Public Utilities, Property, Plant and Equipment, Construction Work in Progress	2,039	1,035
Property, plant and equipment, net	17,820	16,157
Regulated Operation [Member]
Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Plant in Service, Excluding Construction Work In Progress	22,122	21,057
Public Utilities, Property, Plant and Equipment, Accumulated Depreciation	(6,347)	(5,941)
Public Utilities, Property, Plant and Equipment, Net, Excluding Construction Work In Progress	15,775	15,116
Unregulated Operation [Member]
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
Unregulated Operation [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Other Property Plant and Equipment, Useful Life	20 years
Unregulated Operation [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Other Property Plant and Equipment, Useful Life	50 years
Electric Operations [Member] | Regulated Operation [Member]
Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Generation or Processing	$ 14,492	13,727
Public Utilities, Property, Plant and Equipment, Transmission	2,012	1,934
Public Utilities, Property, Plant and Equipment, Distribution	$ 3,842	3,672
Electric Operations [Member] | Regulated Operation [Member] | Minimum [Member]
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
Electric Operations [Member] | Regulated Operation [Member] | Maximum [Member]
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
Natural Gas Processing Plant [Member] | Regulated Operation [Member]
Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Distribution	$ 1,776	$ 1,724
Natural Gas Processing Plant [Member] | Regulated Operation [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Distribution, Useful Life	29 years
Natural Gas Processing Plant [Member] | Regulated Operation [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Distribution, Useful Life	75 years

Property, Plant and Equipment_6

Property, Plant and Equipment, Net Property, Plant and Equipment, Net - MidAmerican Funding (Details) - MidAmerican Funding, LLC and Subsidiaries [Domain] - Other assets - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 24	$ 24
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	$ (13)	$ (12)

Property, Plant and Equipment_7

Property, Plant and Equipment, Net Property, Plant and Equipment, Net - NPC (Details) - Nevada Power Company [Member] - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2019	Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Net, Excluding Construction Work In Progress	$ 6,309	$ 6,321
Public Utilities, Property, Plant and Equipment, Construction Work in Progress	166	97
Property, plant and equipment, net	6,475	6,418
Regulated Operation [Member]
Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Generation or Processing	3,730	3,720
Public Utilities, Property, Plant and Equipment, Distribution	3,503	3,411
Public Utilities, Property, Plant and Equipment, Transmission	1,453	1,439
Public Utilities, Property, Plant and Equipment, Other Property, Plant and Equipment	718	716
Public Utilities, Property, Plant and Equipment, Plant in Service, Excluding Construction Work In Progress	9,404	9,286
Public Utilities, Property, Plant and Equipment, Accumulated Depreciation	3,096	2,966
Public Utilities, Property, Plant and Equipment, Net, Excluding Construction Work In Progress	$ 6,308	6,320
Regulated Operation [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Generation, Useful Life	30 years
Public Utilities, Property, Plant and Equipment, Distribution, Useful Life	20 years
Public Utilities, Property, Plant and Equipment, Transmission, Useful Life	45 years
Public Utilities, Property, Plant and Equipment, Other Property Plant and Equipment, Useful Life	5 years
Regulated Operation [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Generation, Useful Life	55 years
Public Utilities, Property, Plant and Equipment, Distribution, Useful Life	65 years
Public Utilities, Property, Plant and Equipment, Transmission, Useful Life	70 years
Public Utilities, Property, Plant and Equipment, Other Property Plant and Equipment, Useful Life	65 years
Unregulated Operation [Member]
Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Net, Excluding Construction Work In Progress	$ 1	$ 1
Unregulated Operation [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Other Property Plant and Equipment, Useful Life	45 years
Unregulated Operation [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Other Property Plant and Equipment, Useful Life	45 years

Property, Plant and Equipment_8

Property, Plant and Equipment, Net Property, Plant and Equipment, Net - SPPC (Details) - Sierra Pacific Power Company [Member] - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2019	Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Net, Excluding Construction Work In Progress	$ 2,927	$ 2,857
Property, plant and equipment, net	3,026	2,947
Common Facilities [Member]
Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Construction Work in Progress	99	90
Property, plant and equipment, net	3,026	2,947
Regulated Operation [Member] | Electricity Generation Plant, Non-Nuclear [Member]
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	1,657	1,568
Public Utilities, Property, Plant and Equipment, Transmission	831	812
Public Utilities, Property, Plant and Equipment, Other Property, Plant and Equipment	$ 175	185
Regulated Operation [Member] | Electricity Generation Plant, Non-Nuclear [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Generation, Useful Life	25 years
Public Utilities, Property, Plant and Equipment, Distribution, Useful Life	20 years
Public Utilities, Property, Plant and Equipment, Transmission, Useful Life	50 years
Public Utilities, Property, Plant and Equipment, Other Property Plant and Equipment, Useful Life	5 years
Regulated Operation [Member] | Electricity Generation Plant, Non-Nuclear [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Generation, Useful Life	60 years
Public Utilities, Property, Plant and Equipment, Distribution, Useful Life	100 years
Public Utilities, Property, Plant and Equipment, Transmission, Useful Life	100 years
Public Utilities, Property, Plant and Equipment, Other Property Plant and Equipment, Useful Life	70 years
Regulated Operation [Member] | Natural Gas Processing Plant [Member]
Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Distribution	$ 415	403
Public Utilities, Property, Plant and Equipment, Other Property, Plant and Equipment	$ 14	14
Regulated Operation [Member] | Natural Gas Processing Plant [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Distribution, Useful Life	35 years
Public Utilities, Property, Plant and Equipment, Other Property Plant and Equipment, Useful Life	5 years
Regulated Operation [Member] | Natural Gas Processing Plant [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Distribution, Useful Life	70 years
Public Utilities, Property, Plant and Equipment, Other Property Plant and Equipment, Useful Life	70 years
Regulated Operation [Member] | Common Facilities [Member]
Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Common	$ 322	321
Public Utilities, Property, Plant and Equipment, Plant in Service, Excluding Construction Work In Progress	4,547	4,435
Public Utilities, Property, Plant and Equipment, Accumulated Depreciation	1,624	1,583
Public Utilities, Property, Plant and Equipment, Net, Excluding Construction Work In Progress	$ 2,923	2,852
Regulated Operation [Member] | Common Facilities [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Common, Useful Life	5 years
Regulated Operation [Member] | Common Facilities [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Common, Useful Life	70 years
Unregulated Operation [Member]
Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Net, Excluding Construction Work In Progress	$ 4	$ 5
Unregulated Operation [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Other Property Plant and Equipment, Useful Life	70 years
Unregulated Operation [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Other Property Plant and Equipment, Useful Life	70 years

Regulatory Matters Regulatory M

Regulatory Matters Regulatory Matters - NPC (Details) - Nevada Power Company [Member] - Public Utilities Commission, Nevada [Member] - USD ($) $ in Millions	1 Months Ended
	Jun. 30, 2019	Oct. 31, 2018
Stations Casinos LLC [Member]
Schedule Of Regulatory Assets and Liabilities [Line Items]
Total impact fee		$ 15
Boyd Gaming Corporation [Member]
Schedule Of Regulatory Assets and Liabilities [Line Items]
Total impact fee	$ 11

Cash and Cash Equivalents and_4

Cash and Cash Equivalents and Restricted Cash and Cash Equivalents Supplemental Cash Flow Disclosure (Details) - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018	Sep. 30, 2018	Dec. 31, 2017
Condensed Cash Flow Statements, Captions [Line Items]
Cash and cash equivalents	$ 1,141	$ 627
Restricted cash and cash equivalents	238	227
Restricted Cash and Cash Equivalents, Noncurrent	27	29
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	$ 1,406	$ 883	$ 1,402	$ 1,283

Cash and Cash Equivalents and_5

Cash and Cash Equivalents and Restricted Cash and Cash Equivalents Supplemental Cash Flow Disclosures - MEC (Details) - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018	Sep. 30, 2018	Dec. 31, 2017
Condensed Cash Flow Statements, Captions [Line Items]
Cash and cash equivalents	$ 1,141	$ 627
Restricted cash and cash equivalents	238	227
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	1,406	883	$ 1,402	$ 1,283
MidAmerican Energy Company [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Cash and cash equivalents	46	0
Restricted cash and cash equivalents	38	56
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	$ 84	$ 56	$ 183	$ 282

Cash and Cash Equivalents and_6

Cash and Cash Equivalents and Restricted Cash and Cash Equivalents Supplemental Cash Flow Disclosures - LLC (Details) - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018	Sep. 30, 2018	Dec. 31, 2017
Condensed Cash Flow Statements, Captions [Line Items]
Cash and cash equivalents	$ 1,141	$ 627
Restricted cash and cash equivalents	238	227
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	1,406	883	$ 1,402	$ 1,283
MidAmerican Funding, LLC and Subsidiaries [Domain]
Condensed Cash Flow Statements, Captions [Line Items]
Cash and cash equivalents	47	1
Restricted cash and cash equivalents	38	56
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	$ 85	$ 57	$ 183	$ 282

Cash and Cash Equivalents and_7

Cash and Cash Equivalents and Restricted Cash and Cash Equivalents Supplemental Cash Flow Disclosure - Pacificorp (Details) - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018	Sep. 30, 2018	Dec. 31, 2017
Condensed Cash Flow Statements, Captions [Line Items]
Cash and cash equivalents	$ 1,141	$ 627
Restricted cash and cash equivalents	238	227
Restricted Cash and Cash Equivalents, Noncurrent	27	29
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	1,406	883	$ 1,402	$ 1,283
PacifiCorp [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Cash and cash equivalents	331	77
Restricted cash and cash equivalents	19	13
Restricted Cash and Cash Equivalents, Noncurrent	2	2
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	$ 352	$ 92	$ 323	$ 29

Cash and Cash Equivalents and_8

Cash and Cash Equivalents and Restricted Cash and Cash Equivalents Supplemental Cash Flow Disclosure - NPC (Details) - USD ($) $ in Millions	1 Months Ended	9 Months Ended
	Oct. 31, 2019	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018	Dec. 31, 2017
Condensed Cash Flow Statements, Captions [Line Items]
Cash and cash equivalents		$ 1,141		$ 627
Restricted cash and cash equivalents		238		227
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents		1,406	$ 1,402	883	$ 1,283
Nevada Power Company [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Cash and cash equivalents		276		111
Restricted cash and cash equivalents		8		10
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents		284	87	$ 121	$ 66
Payments of Ordinary Dividends, Common Stock		$ 95	$ 0
Subsequent Event [Member] | Nevada Power Company [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Payments of Ordinary Dividends, Common Stock	$ 200

Cash and Cash Equivalents and_9

Cash and Cash Equivalents and Restricted Cash and Cash Equivalents Supplemental Cash Flow Disclosure - SPPC (Details) - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018	Sep. 30, 2018	Dec. 31, 2017
Condensed Cash Flow Statements, Captions [Line Items]
Cash and cash equivalents	$ 1,141	$ 627
Restricted cash and cash equivalents	238	227
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	1,406	883	$ 1,402	$ 1,283
Sierra Pacific Power Company [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Cash and cash equivalents	64	71
Restricted cash and cash equivalents	4	5
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	$ 68	$ 76	$ 75	$ 8

Leases Leases - Summary (Detail

Leases Leases - Summary (Details) $ in Millions	Sep. 30, 2019USD ($)
Leases [Abstract]
Operating Lease, Right-of-Use Asset	$ 526
Finance Lease, Right-of-Use Asset	503
Total Right-of-Use Asset	1,029
Operating Lease, Liability	574
Finance Lease, Liability	517
Total Lease Liabilities	$ 1,091

Leases Leases - Lease Costs (De

Leases Leases - Lease Costs (Details) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2019USD ($)	Sep. 30, 2019USD ($)
Leases [Abstract]
Variable Lease, Cost	$ 156	$ 453
Operating Lease, Cost	43	127
Finance Lease, Right-of-Use Asset, Amortization	4	12
Finance Lease, Interest Expense	10	31
Short-term Lease, Cost	2	6
Lease, Cost	$ 215	$ 629
Operating Lease, Weighted Average Remaining Lease Term	7 years 9 months 18 days	7 years 9 months 18 days
Finance Lease, Weighted Average Remaining Lease Term	29 years 3 months 18 days	29 years 3 months 18 days
Operating Lease, Weighted Average Discount Rate, Percent	5.20%	5.20%
Finance Lease, Weighted Average Discount Rate, Percent	8.60%	8.60%

Leases Leases - Other (Details)

Leases Leases - Other (Details) $ in Millions	9 Months Ended
	Sep. 30, 2019USD ($)
Leases [Abstract]
Operating Lease, Payments	$ (106)
Finance Lease, Interest Payment on Liability	(32)
Finance Lease, Principal Payments	(14)
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	49
Right-of-Use Asset Obtained in Exchange for Finance Lease Liability	$ 12

Leases Leases - Maturity Table

Leases Leases - Maturity Table (Details) - USD ($) $ in Millions		Sep. 30, 2019	Dec. 31, 2018
Lessee, Operating Lease, Liability, Payment, Due [Abstract]
Lessee, Operating Lease, Liability, Payments, Remainder of Fiscal Year		$ 38
Lessee, Operating Lease, Liability, Payments, Due Year Two		139
Lessee, Operating Lease, Liability, Payments, Due Year Three		118
Lessee, Operating Lease, Liability, Payments, Due Year Four		96
Lessee, Operating Lease, Liability, Payments, Due Year Five		68
Lessee, Operating Lease, Liability, Payments, Due after Year Five		241
Lessee, Operating Lease, Liability, Payments, Due		700
Lessee, Operating Lease, Liability, Undiscounted Excess Amount		(126)
Operating Lease, Liability		574
Finance Lease, Liability, Payment, Due [Abstract]
Finance Lease, Liability, Payments, Remainder of Fiscal Year		16
Finance Lease, Liability, Payments, Due Year Two		70
Finance Lease, Liability, Payments, Due Year Three		76
Finance Lease, Liability, Payments, Due Year Four		69
Finance Lease, Liability, Payments, Due Year Five		58
Finance Lease, Liability, Payments, Due after Year Five		779
Finance Lease, Liability, Payment, Due		1,068
Finance Lease, Liability		517
Finance Lease, Liability, Undiscounted Excess Amount		(551)
Lease, Liability, Payments, Remainder of Fiscal Year		54	$ 216	[1]
Lease, Liability, Payments, Due Year Two		209	196	[1]
Lease, Liability, Payments, Due Year Three		194	183	[1]
Lease, Liability, Payments, Due Year Four		165	154	[1]
Lease, Liability, Payments, Due Year Five		126	117	[1]
Lease, Liability, Payments, Due after Year Five		1,020	931	[1]
Lease, Liability, Payments, Due		1,768	1,797	[1]
Lease, Liability, Undiscounted Excess Amount		(677)
Total Lease Liabilities		$ 1,091
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, Net Present Value [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
[1]	(1) Amounts included for comparability and accounted for in accordance with ASC 840, "Leases".

Leases Leases - PacifiCorp - Su

Leases Leases - PacifiCorp - Summary (Details) $ in Millions	Sep. 30, 2019USD ($)
Lessee, Lease, Description [Line Items]
Operating Lease, Right-of-Use Asset	$ 526
Finance Lease, Right-of-Use Asset	503
Total Right-of-Use Asset	1,029
Operating Lease, Liability	574
Finance Lease, Liability	517
Total Lease Liabilities	1,091
PacifiCorp [Member]
Lessee, Lease, Description [Line Items]
Operating Lease, Right-of-Use Asset	13
Finance Lease, Right-of-Use Asset	19
Total Right-of-Use Asset	32
Operating Lease, Liability	13
Finance Lease, Liability	19
Total Lease Liabilities	$ 32

Leases Leases - PacifiCorp - Le

Leases Leases - PacifiCorp - Lease Costs (Details) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2019USD ($)	Sep. 30, 2019USD ($)
Lessee, Lease, Description [Line Items]
Variable Lease, Cost	$ 156	$ 453
Operating Lease, Cost	43	127
Finance Lease, Right-of-Use Asset, Amortization	4	12
Finance Lease, Interest Expense	10	31
Short-term Lease, Cost	2	6
Lease, Cost	$ 215	$ 629
Operating Lease, Weighted Average Remaining Lease Term	7 years 9 months 18 days	7 years 9 months 18 days
Finance Lease, Weighted Average Remaining Lease Term	29 years 3 months 18 days	29 years 3 months 18 days
Operating Lease, Weighted Average Discount Rate, Percent	5.20%	5.20%
Finance Lease, Weighted Average Discount Rate, Percent	8.60%	8.60%
PacifiCorp [Member]
Lessee, Lease, Description [Line Items]
Variable Lease, Cost	$ 10	$ 36
Operating Lease, Cost	1	2
Finance Lease, Right-of-Use Asset, Amortization	0	1
Finance Lease, Interest Expense	1	2
Short-term Lease, Cost	0	1
Lease, Cost	$ 12	$ 42
Operating Lease, Weighted Average Remaining Lease Term	13 years 7 months 9 days	13 years 7 months 9 days
Finance Lease, Weighted Average Remaining Lease Term	9 years 4 months 2 days	9 years 4 months 2 days
Operating Lease, Weighted Average Discount Rate, Percent	3.70%	3.70%
Finance Lease, Weighted Average Discount Rate, Percent	10.60%	10.60%

Leases Leases - PacifiCorp - Ma

Leases Leases - PacifiCorp - Maturity Table (Details) - USD ($) $ in Millions		Sep. 30, 2019	Dec. 31, 2018
Lessee, Operating Lease, Liability, Payment, Due [Abstract]
Lessee, Operating Lease, Liability, Payments, Remainder of Fiscal Year		$ 38
Lessee, Operating Lease, Liability, Payments, Due Year Two		139
Lessee, Operating Lease, Liability, Payments, Due Year Three		118
Lessee, Operating Lease, Liability, Payments, Due Year Four		96
Lessee, Operating Lease, Liability, Payments, Due Year Five		68
Lessee, Operating Lease, Liability, Payments, Due after Year Five		241
Lessee, Operating Lease, Liability, Payments, Due		700
Lessee, Operating Lease, Liability, Undiscounted Excess Amount		(126)
Operating Lease, Liability		574
Finance Lease, Liability, Payment, Due [Abstract]
Finance Lease, Liability, Payments, Remainder of Fiscal Year		16
Finance Lease, Liability, Payments, Due Year Two		70
Finance Lease, Liability, Payments, Due Year Three		76
Finance Lease, Liability, Payments, Due Year Four		69
Finance Lease, Liability, Payments, Due Year Five		58
Finance Lease, Liability, Payments, Due after Year Five		779
Finance Lease, Liability, Payment, Due		1,068
Finance Lease, Liability, Undiscounted Excess Amount		(551)
Finance Lease, Liability		517
Lease, Liability, Payments, Remainder of Fiscal Year		54	$ 216	[1]
Lease, Liability, Payments, Due Year Two		209	196	[1]
Lease, Liability, Payments, Due Year Three		194	183	[1]
Lease, Liability, Payments, Due Year Four		165	154	[1]
Lease, Liability, Payments, Due Year Five		126	117	[1]
Lease, Liability, Payments, Due after Year Five		1,020	931	[1]
Lease, Liability, Payments, Due		1,768	1,797	[1]
Lease, Liability, Undiscounted Excess Amount		(677)
Total Lease Liabilities		1,091
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, Net Present Value [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, Remainder of Fiscal Year		1
Lessee, Operating Lease, Liability, Payments, Due Year Two		3
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		2
Lessee, Operating Lease, Liability, Payments, Due after Year Five		7
Lessee, Operating Lease, Liability, Payments, Due		17
Lessee, Operating Lease, Liability, Undiscounted Excess Amount		(4)
Operating Lease, Liability		13
Finance Lease, Liability, Payment, Due [Abstract]
Finance Lease, Liability, Payments, Remainder of Fiscal Year		1
Finance Lease, Liability, Payments, Due Year Two		3
Finance Lease, Liability, Payments, Due Year Three		7
Finance Lease, Liability, Payments, Due Year Four		3
Finance Lease, Liability, Payments, Due Year Five		2
Finance Lease, Liability, Payments, Due after Year Five		16
Finance Lease, Liability, Payment, Due		32
Finance Lease, Liability, Undiscounted Excess Amount		(13)
Finance Lease, Liability		19
Lease, Liability, Payments, Remainder of Fiscal Year		2	7
Lease, Liability, Payments, Due Year Two		6	7
Lease, Liability, Payments, Due Year Three		9	10
Lease, Liability, Payments, Due Year Four		5	5
Lease, Liability, Payments, Due Year Five		4	4
Lease, Liability, Payments, Due after Year Five		23	23
Lease, Liability, Payments, Due		49	56
Lease, Liability, Undiscounted Excess Amount		(17)
Total Lease Liabilities		$ 32
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
Operating Leases, Future Minimum Payments Due, Next Twelve Months			3
Operating Leases, Future Minimum Payments, Due in Two Years			3
Operating Leases, Future Minimum Payments, Due in Three Years			3
Operating Leases, Future Minimum Payments, Due in Four Years			2
Operating Leases, Future Minimum Payments, Due in Five Years			2
Operating Leases, Future Minimum Payments, Due Thereafter			7
Operating Leases, Future Minimum Payments Due			20
Capital Leases, Future Minimum Payments, Net Present Value [Abstract]
Capital Leases, Future Minimum Payments Due, Next Twelve Months			4
Capital Leases, Future Minimum Payments Due in Two Years			4
Capital Leases, Future Minimum Payments Due in Three Years			7
Capital Leases, Future Minimum Payments Due in Four Years			3
Capital Leases, Future Minimum Payments Due in Five Years			2
Capital Leases, Future Minimum Payments Due Thereafter			16
Capital Leases, Future Minimum Payments Due			$ 36
[1]	(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	Sep. 30, 2019	Dec. 31, 2018
Lessee, Lease, Description [Line Items]
Operating Lease, Right-of-Use Asset	$ 526
Finance Lease, Right-of-Use Asset	503
Total Right-of-Use Asset	1,029
Operating Lease, Liability	574
Finance Lease, Liability	517
Total Lease Liabilities	1,091
Nevada Power Company [Member]
Lessee, Lease, Description [Line Items]
Operating Lease, Right-of-Use Asset	14
Finance Lease, Right-of-Use Asset	442	$ 450
Total Right-of-Use Asset	456
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	3 Months Ended	9 Months Ended
	Sep. 30, 2019USD ($)	Sep. 30, 2019USD ($)
Lessee, Lease, Description [Line Items]
Variable Lease, Cost	$ 156	$ 453
Operating Lease, Cost	43	127
Finance Lease, Right-of-Use Asset, Amortization	4	12
Finance Lease, Interest Expense	10	31
Lease, Cost	$ 215	$ 629
Operating Lease, Weighted Average Remaining Lease Term	7 years 9 months 18 days	7 years 9 months 18 days
Finance Lease, Weighted Average Remaining Lease Term	29 years 3 months 18 days	29 years 3 months 18 days
Operating Lease, Weighted Average Discount Rate, Percent	5.20%	5.20%
Finance Lease, Weighted Average Discount Rate, Percent	8.60%	8.60%
Nevada Power Company [Member]
Lessee, Lease, Description [Line Items]
Variable Lease, Cost	$ 113	$ 333
Operating Lease, Cost	1	2
Finance Lease, Right-of-Use Asset, Amortization	3	9
Finance Lease, Interest Expense	8	28
Lease, Cost	$ 125	$ 372
Operating Lease, Weighted Average Remaining Lease Term	7 years 8 months 8 days	7 years 8 months 8 days
Finance Lease, Weighted Average Remaining Lease Term	30 years 11 months 5 days	30 years 11 months 5 days
Operating Lease, Weighted Average Discount Rate, Percent	4.50%	4.50%
Finance Lease, Weighted Average Discount Rate, Percent	8.70%	8.70%

Leases Leases - NPC - Other (De

Leases Leases - NPC - Other (Details) $ in Millions	9 Months Ended
	Sep. 30, 2019USD ($)
Lessee, Lease, Description [Line Items]
Operating Lease, Payments	$ (106)
Finance Lease, Interest Payment on Liability	(32)
Finance Lease, Principal Payments	(14)
Right-of-Use Asset Obtained in Exchange for Finance Lease Liability	12
Nevada Power Company [Member]
Lessee, Lease, Description [Line Items]
Operating Lease, Payments	(2)
Finance Lease, Interest Payment on Liability	(29)
Finance Lease, Principal Payments	(11)
Right-of-Use Asset Obtained in Exchange for Finance Lease Liability	$ 8

Leases Leases - NPC - Maturity

Leases Leases - NPC - Maturity Table (Details) - USD ($) $ in Millions		Sep. 30, 2019	Dec. 31, 2018
Lessee, Operating Lease, Liability, Payment, Due [Abstract]
Lessee, Operating Lease, Liability, Payments, Remainder of Fiscal Year		$ 38
Lessee, Operating Lease, Liability, Payments, Due Year Two		139
Lessee, Operating Lease, Liability, Payments, Due Year Three		118
Lessee, Operating Lease, Liability, Payments, Due Year Four		96
Lessee, Operating Lease, Liability, Payments, Due Year Five		68
Lessee, Operating Lease, Liability, Payments, Due after Year Five		241
Lessee, Operating Lease, Liability, Payments, Due		700
Lessee, Operating Lease, Liability, Undiscounted Excess Amount		(126)
Operating Lease, Liability		574
Finance Lease, Liability, Payment, Due [Abstract]
Finance Lease, Liability, Payments, Remainder of Fiscal Year		16
Finance Lease, Liability, Payments, Due Year Two		70
Finance Lease, Liability, Payments, Due Year Three		76
Finance Lease, Liability, Payments, Due Year Four		69
Finance Lease, Liability, Payments, Due Year Five		58
Finance Lease, Liability, Payments, Due after Year Five		779
Finance Lease, Liability, Payment, Due		1,068
Finance Lease, Liability, Undiscounted Excess Amount		(551)
Finance Lease, Liability		517
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, Net Present Value [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
Lease, Liability, Payments, Remainder of Fiscal Year		54	216	[1]
Lease, Liability, Payments, Due Year Two		209	196	[1]
Lease, Liability, Payments, Due Year Three		194	183	[1]
Lease, Liability, Payments, Due Year Four		165	154	[1]
Lease, Liability, Payments, Due Year Five		126	117	[1]
Lease, Liability, Payments, Due after Year Five		1,020	931	[1]
Lease, Liability, Payments, Due		1,768	1,797	[1]
Lease, Liability, Undiscounted Excess Amount		(677)
Total Lease Liabilities		1,091
Nevada Power Company [Member]
Lessee, Operating Lease, Liability, Payment, Due [Abstract]
Lessee, Operating Lease, Liability, Payments, Remainder of Fiscal Year		1
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		9
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, Remainder of Fiscal Year		13
Finance Lease, Liability, Payments, Due Year Two		59
Finance Lease, Liability, Payments, Due Year Three		63
Finance Lease, Liability, Payments, Due Year Four		61
Finance Lease, Liability, Payments, Due Year Five		51
Finance Lease, Liability, Payments, Due after Year Five		715
Finance Lease, Liability, Payment, Due		962
Finance Lease, Liability, Undiscounted Excess Amount		(508)
Finance Lease, Liability		454
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]		3
Operating Leases, Future Minimum Payments, Due in Five Years	[2]		2
Operating Leases, Future Minimum Payments, Due Thereafter	[2]		10
Operating Leases, Future Minimum Payments Due	[2]		24
Capital Leases, Future Minimum Payments, Net Present Value [Abstract]
Capital Leases, Future Minimum Payments Due, Next Twelve Months	[2]		59
Capital Leases, Future Minimum Payments Due in Two Years	[2]		59
Capital Leases, Future Minimum Payments Due in Three Years	[2]		61
Capital Leases, Future Minimum Payments Due in Four Years	[2]		60
Capital Leases, Future Minimum Payments Due in Five Years	[2]		50
Capital Leases, Future Minimum Payments Due Thereafter	[2]		709
Capital Leases, Future Minimum Payments Due	[2]		998
Lease, Liability, Payments, Remainder of Fiscal Year		14	62	[2]
Lease, Liability, Payments, Due Year Two		62	62	[2]
Lease, Liability, Payments, Due Year Three		66	64	[2]
Lease, Liability, Payments, Due Year Four		63	63	[2]
Lease, Liability, Payments, Due Year Five		53	52	[2]
Lease, Liability, Payments, Due after Year Five		724	719	[2]
Lease, Liability, Payments, Due		982	$ 1,022	[2]
Lease, Liability, Undiscounted Excess Amount		(511)
Total Lease Liabilities		$ 471
[1]	(1) Amounts included for comparability and accounted for in accordance with ASC 840, "Leases".
[2]	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	Sep. 30, 2019USD ($)
Lessee, Lease, Description [Line Items]
Operating Lease, Right-of-Use Asset	$ 526
Finance Lease, Right-of-Use Asset	503
Total Right-of-Use Asset	1,029
Operating Lease, Liability	574
Finance Lease, Liability	517
Total Lease Liabilities	1,091
Sierra Pacific Power Company [Member]
Lessee, Lease, Description [Line Items]
Operating Lease, Right-of-Use Asset	18
Finance Lease, Right-of-Use Asset	41
Total Right-of-Use Asset	59
Operating Lease, Liability	18
Finance Lease, Liability	42
Total Lease Liabilities	$ 60

Leases Leases - SPPC - Lease Co

Leases Leases - SPPC - Lease Costs (Details) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2019USD ($)	Sep. 30, 2019USD ($)
Lessee, Lease, Description [Line Items]
Variable Lease, Cost	$ 156	$ 453
Operating Lease, Cost	43	127
Finance Lease, Right-of-Use Asset, Amortization	4	12
Finance Lease, Interest Expense	10	31
Lease, Cost	$ 215	$ 629
Operating Lease, Weighted Average Remaining Lease Term	7 years 9 months 18 days	7 years 9 months 18 days
Finance Lease, Weighted Average Remaining Lease Term	29 years 3 months 18 days	29 years 3 months 18 days
Operating Lease, Weighted Average Discount Rate, Percent	5.20%	5.20%
Finance Lease, Weighted Average Discount Rate, Percent	8.60%	8.60%
Sierra Pacific Power Company [Member]
Lessee, Lease, Description [Line Items]
Variable Lease, Cost	$ 21	$ 51
Operating Lease, Cost	0	1
Finance Lease, Right-of-Use Asset, Amortization	0	1
Finance Lease, Interest Expense	1	2
Lease, Cost	$ 22	$ 55
Operating Lease, Weighted Average Remaining Lease Term	26 years	26 years
Finance Lease, Weighted Average Remaining Lease Term	22 years 1 month 6 days	22 years 1 month 6 days
Operating Lease, Weighted Average Discount Rate, Percent	5.00%	5.00%
Finance Lease, Weighted Average Discount Rate, Percent	7.20%	7.20%

Leases Leases - SPPC - Other (D

Leases Leases - SPPC - Other (Details) $ in Millions	9 Months Ended
	Sep. 30, 2019USD ($)
Lessee, Lease, Description [Line Items]
Operating Lease, Payments	$ (106)
Finance Lease, Interest Payment on Liability	(32)
Finance Lease, Principal Payments	(14)
Right-of-Use Asset Obtained in Exchange for Finance Lease Liability	12
Sierra Pacific Power Company [Member]
Lessee, Lease, Description [Line Items]
Operating Lease, Payments	(2)
Finance Lease, Interest Payment on Liability	(2)
Finance Lease, Principal Payments	(2)
Right-of-Use Asset Obtained in Exchange for Finance Lease Liability	$ 5

Leases Leases - SPPC - Maturity

Leases Leases - SPPC - Maturity Table (Details) - USD ($) $ in Millions		Sep. 30, 2019	Dec. 31, 2018
Lessee, Operating Lease, Liability, Payment, Due [Abstract]
Lessee, Operating Lease, Liability, Payments, Remainder of Fiscal Year		$ 38
Lessee, Operating Lease, Liability, Payments, Due Year Two		139
Lessee, Operating Lease, Liability, Payments, Due Year Three		118
Lessee, Operating Lease, Liability, Payments, Due Year Four		96
Lessee, Operating Lease, Liability, Payments, Due Year Five		68
Lessee, Operating Lease, Liability, Payments, Due after Year Five		241
Lessee, Operating Lease, Liability, Payments, Due		700
Lessee, Operating Lease, Liability, Undiscounted Excess Amount		(126)
Operating Lease, Liability		574
Finance Lease, Liability, Payment, Due [Abstract]
Finance Lease, Liability, Payments, Remainder of Fiscal Year		16
Finance Lease, Liability, Payments, Due Year Two		70
Finance Lease, Liability, Payments, Due Year Three		76
Finance Lease, Liability, Payments, Due Year Four		69
Finance Lease, Liability, Payments, Due Year Five		58
Finance Lease, Liability, Payments, Due after Year Five		779
Finance Lease, Liability, Payment, Due		1,068
Finance Lease, Liability, Undiscounted Excess Amount		(551)
Finance Lease, Liability		517
Lease, Liability, Payments, Remainder of Fiscal Year		54	$ 216	[1]
Lease, Liability, Payments, Due Year Two		209	196	[1]
Lease, Liability, Payments, Due Year Three		194	183	[1]
Lease, Liability, Payments, Due Year Four		165	154	[1]
Lease, Liability, Payments, Due Year Five		126	117	[1]
Lease, Liability, Payments, Due after Year Five		1,020	931	[1]
Lease, Liability, Payments, Due		1,768	1,797	[1]
Lease, Liability, Undiscounted Excess Amount		(677)
Total Lease Liabilities		1,091
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, Net Present Value [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, Remainder of Fiscal Year		0
Lessee, Operating Lease, Liability, Payments, Due Year Two		2
Lessee, Operating Lease, Liability, Payments, Due Year Three		2
Lessee, Operating Lease, Liability, Payments, Due Year Four		1
Lessee, Operating Lease, Liability, Payments, Due Year Five		1
Lessee, Operating Lease, Liability, Payments, Due after Year Five		27
Lessee, Operating Lease, Liability, Payments, Due		33
Lessee, Operating Lease, Liability, Undiscounted Excess Amount		(15)
Operating Lease, Liability		18
Finance Lease, Liability, Payment, Due [Abstract]
Finance Lease, Liability, Payments, Remainder of Fiscal Year		2
Finance Lease, Liability, Payments, Due Year Two		6
Finance Lease, Liability, Payments, Due Year Three		6
Finance Lease, Liability, Payments, Due Year Four		5
Finance Lease, Liability, Payments, Due Year Five		5
Finance Lease, Liability, Payments, Due after Year Five		48
Finance Lease, Liability, Payment, Due		72
Finance Lease, Liability, Undiscounted Excess Amount		(30)
Finance Lease, Liability		42
Lease, Liability, Payments, Remainder of Fiscal Year		2	8	[2]
Lease, Liability, Payments, Due Year Two		8	6	[2]
Lease, Liability, Payments, Due Year Three		8	7	[2]
Lease, Liability, Payments, Due Year Four		6	5	[2]
Lease, Liability, Payments, Due Year Five		6	5	[2]
Lease, Liability, Payments, Due after Year Five		75	75	[2]
Lease, Liability, Payments, Due		105	106	[2]
Lease, Liability, Undiscounted Excess Amount		(45)
Total Lease Liabilities		$ 60
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, Net Present Value [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]	(1) Amounts included for comparability and accounted for in accordance with ASC 840, "Leases".
[2]	Amounts included for comparability and accounted for in accordance with ASC Topic 840, "Leases".

Recent Financing Transactions R

Recent Financing Transactions Recent Financing Transactions - Long-Term Debt (Details) £ in Millions, $ in Millions	Oct. 31, 2019USD ($)	Oct. 31, 2019GBP (£)	Jun. 30, 2019USD ($)	May 31, 2019GBP (£)	Mar. 31, 2019USD ($)	Feb. 28, 2019USD ($)	Jan. 31, 2019USD ($)	Jul. 31, 2018USD ($)
Northern Natural Gas [Member] | Senior Bonds, 4.30%, due 2049 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount			$ 200					$ 450
Debt Instrument, Interest Rate, Stated Percentage			4.30%					4.30%
Northern Electric Plc [Member] | Guaranteed Bonds, 2.75%, due May 2049 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount | £				£ 150
Debt Instrument, Interest Rate, Stated Percentage				2.75%
PacifiCorp [Member] | PAC First Mortgage Bonds, 3.50, Due 2029 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount					$ 400
Debt Instrument, Interest Rate, Stated Percentage					3.50%
PacifiCorp [Member] | PAC First Mortgage Bonds, 4.15, Due 2050 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount					$ 600
Debt Instrument, Interest Rate, Stated Percentage					4.15%
PacifiCorp [Member] | PAC First Mortgage Bonds, 5.50, Due 2019 [Member]
Debt Instrument [Line Items]
Debt Instrument, Repurchase Amount					$ 350
Debt Instrument, Interest Rate, Stated Percentage					5.50%
MidAmerican Energy Company [Member] | MEC First Mortgage Bonds, 2.40%, Due March 2019 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage						2.40%
Debt Instrument, Repurchased Face Amount						$ 500
MidAmerican Energy Company [Member] | MEC First Mortgage Bonds, 3.65%, Due April 2029 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount							$ 600
Debt Instrument, Interest Rate, Stated Percentage							3.65%
MidAmerican Energy Company [Member] | MEC First Mortgage Bonds, 4.25%, Due July 2049 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount							$ 900
Debt Instrument, Interest Rate, Stated Percentage							4.25%
Northern Powergrid Holdings [Member] | Bonds, 2.25%, due 2059 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	2.25%	2.25%
NVE Holdings [Member] | Nevada Power Company [Member] | NPC General and Refunding Mortgage Notes, Series CC [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount							$ 500
Debt Instrument, Interest Rate, Stated Percentage							3.70%
NVE Holdings [Member] | Nevada Power Company [Member] | NPC General and Refunding Mortgage Notes, Series V [Member]
Debt Instrument [Line Items]
Debt Instrument, Repurchase Amount							$ 500
Debt Instrument, Interest Rate, Stated Percentage							7.10%
Subsequent Event [Member] | MidAmerican Energy Company [Member] | MEC First Mortgage Bonds, 3.15%, Due April 2050 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 600
Debt Instrument, Interest Rate, Stated Percentage	3.15%	3.15%
Subsequent Event [Member] | MidAmerican Energy Company [Member] | MEC First Mortgage Bonds, 3.65%, Due April 2029 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 250
Debt Instrument, Interest Rate, Stated Percentage	3.65%	3.65%
Subsequent Event [Member] | Northern Powergrid Holdings [Member] | Bonds, 2.25%, due 2059 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount | £		£ 300

Recent Financing Transactions_2

Recent Financing Transactions Recent Financings Transactions - Credit Facilities (Details) £ in Millions, $ in Millions	Oct. 31, 2019GBP (£)	Aug. 31, 2019USD ($)	May 31, 2019USD ($)
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 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
Berkshire Hathaway Energy [Member] | Unsecured credit facility, $3.5 billion, expiring June 2022 [Member] | Line of Credit [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity			3,500
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
NVE Holdings [Member] | Line of Credit [Member] | Nevada Power Company [Member] | Secured credit facility, $400 million, expiring June 2022 [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity			400
NVE Holdings [Member] | Line of Credit [Member] | Sierra Pacific Power Company [Member] | Secured credit facility, $250 million, expiring June 2022 [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity			$ 250
Subsequent Event [Member] | Northern Powergrid Holdings [Member] | Multicurrency revolving credit facility, expiring October 2022 [Member] | Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity | £	£ 150

Recent Financing Transactions_3

Recent Financing Transactions Recent Financing Transactions - PAC (Details) - PacifiCorp [Member] - USD ($) $ in Millions	May 31, 2019	Mar. 31, 2019
Debt Instrument [Line Items]
Line of Credit Facility, Amounts Supported		$ 170
PAC First Mortgage Bonds, 3.50, Due 2029 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount		$ 400
Debt Instrument, Interest Rate, Stated Percentage		3.50%
PAC First Mortgage Bonds, 5.50, Due 2019 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		5.50%
Debt Instrument, Repurchase Amount		$ 350
PAC First Mortgage Bonds, 4.15, Due 2050 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount		$ 600
Debt Instrument, Interest Rate, Stated Percentage		4.15%
Tax exempt bond obligations and commodity contract collateral requirement [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Amounts Supported		$ 168
Line of Credit [Member] | Unsecured credit facility, $600 million, expiring June 2022, first facility, extended [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 600
Line of Credit [Member] | Unsecured credit facility, $600 million, expiring June 2022, second facility, extended [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 600

Recent Financing Transactions_4

Recent Financing Transactions Recent Financing Transactions - MEC (Details) - MidAmerican Energy Company [Member] $ in Millions	Sep. 30, 2019	Aug. 31, 2019USD ($)	May 31, 2019USD ($)	Feb. 28, 2019USD ($)	Jan. 31, 2019USD ($)
MEC First Mortgage Bonds, 3.65%, Due April 2029 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount					$ 600
Debt Instrument, Interest Rate, Stated Percentage					3.65%
MEC First Mortgage Bonds, 4.25%, Due July 2049 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount					$ 900
Debt Instrument, Interest Rate, Stated Percentage					4.25%
MEC First Mortgage Bonds, 2.40%, Due March 2019 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage				2.40%
Debt Instrument, Repurchased Face Amount				$ 500
Line of Credit [Member]
Debt Instrument [Line Items]
Debt To Capitalization Ratio	0.65
Line of Credit [Member] | Unsecured credit facility, $400 million, expiring August 2020 [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		$ 400
Line of Credit [Member] | Unsecured credit facility, $900 million, expiring June 2022 [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity			$ 900

Recent Financing Transactions_5

Recent Financing Transactions Recent Financing Transactions - NPC (Details) - Nevada Power Company [Member] - NVE Holdings [Member] - USD ($) $ in Millions	May 31, 2019	Jan. 31, 2019
NPC General and Refunding Mortgage Notes, Series CC [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount		$ 500
Debt Instrument, Interest Rate, Stated Percentage		3.70%
NPC General and Refunding Mortgage Notes, Series V [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		7.10%
Debt Instrument, Repurchase Amount		$ 500
Line of Credit [Member] | Secured credit facility, $400 million, expiring June 2022 [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 400

Recent Financing Transactions_6

Recent Financing Transactions Recent Financing Transactions - SPPC (Details) - NVE Holdings [Member] - Sierra Pacific Power Company [Member] - USD ($) $ in Millions	Jun. 30, 2019	May 31, 2019	Apr. 30, 2019	Apr. 01, 2019
Water facilities refunding revenue bonds, series 2016C, due 2036 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount			$ 30
Water facilities refunding revenue bonds, series 2016D, due 2036 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount			$ 25
Debt Instrument, Interest Rate, Stated Percentage			2.05%
Water facilities refunding revenue bonds, series 2016E, due 2036 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount			$ 25
Debt Instrument, Interest Rate, Stated Percentage				2.05%
Pollution Control Revenue Bonds, Variable-Rate, Series 2016B due 2029 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount			$ 30
Debt Instrument, Interest Rate, Stated Percentage			1.85%
Water facilities refunding revenue bonds, series 2016F, due 2036 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount			$ 75
Debt Instrument, Interest Rate, Stated Percentage				2.05%
Water facilities refunding revenue bonds, series 2016G, due 2036 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount			$ 20
Debt Instrument, Interest Rate, Stated Percentage				1.85%
Gas facilities refunding revenue bonds, 1.500%, series 2016A, due 2031 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 59
Pollution Control Refunding Revenue Bonds, 1.250%, Series 2016A, due 2029 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 20
Secured credit facility, $250 million, expiring June 2022 [Member] | Line of Credit [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		$ 250

Income Taxes (Details)

Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Abstract]
Federal statutory income tax rate	21.00%	21.00%	21.00%	21.00%
Effective Income Tax Rate Reconciliation, Tax Credit, Percent	(43.00%)	(19.00%)	(35.00%)	(29.00%)
State income tax, net of federal income tax benefit	(3.00%)	1.00%	(6.00%)	(6.00%)
Income tax effect of foreign income	(1.00%)	(0.00%)	(2.00%)	(3.00%)
Effects of ratemaking	(9.00%)	(2.00%)	(5.00%)	(3.00%)
Equity income	0.00%	0.00%	0.00%	0.00%
Other, net	(1.00%)	1.00%	(0.00%)	1.00%
Effective income tax rate	(36.00%)	2.00%	(27.00%)	(19.00%)
Production Tax Credit Carryforwards [Abstract]
Years eligible for federal renewable energy production tax credit			10 years
Related Party Tax Expense [Abstract]
Long-term income tax receivable	$ (457)		$ (457)		$ (457)
Parent Company [Member]
Related Party Tax Expense [Abstract]
Related party transaction, cash received for income taxes, net			$ 534	$ 450

Income Taxes - PAC (Details)

Income Taxes - PAC (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Schedule of Effective Income Tax Rate Reconciliation [Line Items]
Federal statutory income tax rate	21.00%	21.00%	21.00%	21.00%
State income tax, net of federal income tax benefit	3.00%	(1.00%)	6.00%	6.00%
Effective Income Tax Rate Reconciliation, Tax Credit, Percent	(43.00%)	(19.00%)	(35.00%)	(29.00%)
Effects of ratemaking	(9.00%)	(2.00%)	(5.00%)	(3.00%)
Other, net	1.00%	(1.00%)	0.00%	(1.00%)
Effective income tax rate	36.00%	(2.00%)	27.00%	19.00%
Production Tax Credit Carryforwards [Abstract]
Years eligible for federal renewable energy production tax credit			10 years
PacifiCorp [Member]
Schedule of Effective Income Tax Rate Reconciliation [Line Items]
Federal statutory income tax rate	21.00%	21.00%	21.00%	21.00%
State income tax, net of federal income tax benefit	3.00%	4.00%	3.00%	4.00%
Effective Income Tax Rate Reconciliation, Tax Credit, Percent	(3.00%)	(5.00%)	(4.00%)	(5.00%)
Effects of ratemaking	(3.00%)	(4.00%)	(2.00%)	(4.00%)
Effective Income Tax Rate Reconciliation, Amortization of excess deferred income taxes	(18.00%)	0.00%	(7.00%)	0.00%
Other, net	(1.00%)	(1.00%)	0.00%	(2.00%)
Effective income tax rate	(1.00%)	15.00%	11.00%	14.00%
Effective income tax reconciliation, Amortization of excess deferred income taxes, Dollar			$ 49
Production Tax Credit Carryforwards [Abstract]
Years eligible for federal renewable energy production tax credit			10 years

Income Taxes - MEC (Details)

Income Taxes - MEC (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Abstract]
Federal statutory income tax rate	21.00%	21.00%	21.00%	21.00%
Effective Income Tax Rate Reconciliation, Tax Credit, Percent	(43.00%)	(19.00%)	(35.00%)	(29.00%)
State income tax, net of federal income tax benefit	(3.00%)	1.00%	(6.00%)	(6.00%)
Effects of ratemaking	(9.00%)	(2.00%)	(5.00%)	(3.00%)
Other, net	(1.00%)	1.00%	(0.00%)	1.00%
Effective income tax rate	36.00%	(2.00%)	27.00%	19.00%
Production Tax Credit Carryforwards [Abstract]
Years eligible for federal renewable energy production tax credit			10 years
MidAmerican Energy Company [Member]
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Abstract]
Federal statutory income tax rate	21.00%	21.00%	21.00%	21.00%
Effective Income Tax Rate Reconciliation, Tax Credit, Percent	(35.00%)	(95.00%)	(75.00%)	(97.00%)
State income tax, net of federal income tax benefit	(18.00%)	(10.00%)	(19.00%)	(9.00%)
Effects of ratemaking	(7.00%)	(4.00%)	(7.00%)	(7.00%)
Other, net	1.00%	(0.00%)	(1.00%)	(1.00%)
Effective income tax rate	(38.00%)	(88.00%)	(81.00%)	(93.00%)
Production Tax Credit Carryforwards [Abstract]
Years eligible for federal renewable energy production tax credit			10 years
Recognized production tax credits			$ 259	$ 349
MidAmerican Energy Company [Member] | Berkshire Hathaway Energy [Member]
Related Party Income Tax Receivable (Payable) [Abstract]
Related party transaction, cash (paid) received for income taxes, net			309	$ 232
Production Tax Credit Recognition [Member] | MidAmerican Energy Company [Member]
Production Tax Credit Carryforwards [Abstract]
Recognized production tax credits			$ (129)

Income Taxes - MidAmerican Fund

Income Taxes - MidAmerican Funding (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Abstract]
Federal statutory income tax rate	21.00%	21.00%	21.00%	21.00%
Effective Income Tax Rate Reconciliation, Tax Credit, Percent	(43.00%)	(19.00%)	(35.00%)	(29.00%)
State income tax, net of federal income tax benefit	(3.00%)	1.00%	(6.00%)	(6.00%)
Effects of ratemaking	(9.00%)	(2.00%)	(5.00%)	(3.00%)
Other, net	(1.00%)	1.00%	(0.00%)	1.00%
Effective income tax rate	36.00%	(2.00%)	27.00%	19.00%
Production Tax Credit Carryforwards [Abstract]
Years eligible for federal renewable energy production tax credit			10 years
MidAmerican Funding, LLC and Subsidiaries [Domain]
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Abstract]
Federal statutory income tax rate	21.00%	21.00%	21.00%	21.00%
Effective Income Tax Rate Reconciliation, Tax Credit, Percent	(36.00%)	(97.00%)	(78.00%)	(101.00%)
State income tax, net of federal income tax benefit	(18.00%)	(10.00%)	(20.00%)	(10.00%)
Effects of ratemaking	(7.00%)	(5.00%)	(7.00%)	(7.00%)
Other, net	(0.00%)	(0.00%)	(1.00%)	(0.00%)
Effective income tax rate	(40.00%)	(91.00%)	(85.00%)	(97.00%)
Production Tax Credit Carryforwards [Abstract]
Years eligible for federal renewable energy production tax credit			10 years
Recognized production tax credits	$ 69	$ 241	$ 259	$ 349
MidAmerican Funding, LLC and Subsidiaries [Domain] | Berkshire Hathaway Energy [Member]
Related Party Income Tax Receivable (Payable) [Abstract]
Related party transaction, cash (paid) received for income taxes, net			313	$ 248
Production Tax Credit Recognition [Member] | MidAmerican Funding, LLC and Subsidiaries [Domain]
Production Tax Credit Carryforwards [Abstract]
Recognized production tax credits	$ (185)		$ (129)

Income Taxes Income Taxes - NPC

Income Taxes Income Taxes - NPC (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Schedule of Effective Income Tax Rate Reconciliation [Line Items]
Federal statutory income tax rate	21.00%	21.00%	21.00%	21.00%
Effective Income Tax Rate Reconciliation Regulatory Differences	9.00%	2.00%	5.00%	3.00%
Other, net	1.00%	(1.00%)	0.00%	(1.00%)
Effective income tax rate	36.00%	(2.00%)	27.00%	19.00%
Nevada Power Company [Member]
Schedule of Effective Income Tax Rate Reconciliation [Line Items]
Federal statutory income tax rate	21.00%	21.00%	21.00%	21.00%
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Percent	0.00%	3.00%	0.00%	3.00%
Effective Income Tax Rate Reconciliation Regulatory Differences	0.00%	1.00%	0.00%	0.00%
Other, net	0.00%	(1.00%)	1.00%	0.00%
Effective income tax rate	21.00%	24.00%	22.00%	24.00%

Income Taxes Income Taxes - SPP

Income Taxes Income Taxes - SPPC (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Schedule of Effective Income Tax Rate Reconciliation [Line Items]
Federal statutory income tax rate	21.00%	21.00%	21.00%	21.00%
Effects of ratemaking	(9.00%)	(2.00%)	(5.00%)	(3.00%)
Other, net	1.00%	(1.00%)	0.00%	(1.00%)
Effective income tax rate	36.00%	(2.00%)	27.00%	19.00%
Sierra Pacific Power Company [Member]
Schedule of Effective Income Tax Rate Reconciliation [Line Items]
Federal statutory income tax rate	21.00%	21.00%	21.00%	21.00%
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Percent	0.00%	5.00%	0.00%	4.00%
Effects of ratemaking	(0.00%)	(1.00%)	(0.00%)	(0.00%)
Other, net	0.00%	0.00%	1.00%	0.00%
Effective income tax rate	21.00%	27.00%	22.00%	25.00%

Employee Benefit Plans (Details

Employee Benefit Plans (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 1	$ 1	$ 6	$ 6
Interest cost	6	7	20	19
Expected return on plan assets	(10)	(9)	(30)	(31)
Net amortization	0	(3)	(3)	(9)
Net periodic benefit cost	(3)	(4)	(7)	(15)
UNITED STATES | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	4	5	12	15
Interest cost	27	26	82	78
Expected return on plan assets	(38)	(41)	(115)	(123)
Net amortization	8	8	24	23
Net periodic benefit cost	1	(2)	3	(7)
UNITED KINGDOM | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	3	5	11	15
Interest cost	13	14	39	42
Expected return on plan assets	(24)	(25)	(74)	(78)
Defined Benefit Plan, Accumulated Benefit Obligation, (Increase) Decrease for Settlement and Curtailment	21	12	21	36
Net amortization	9	9	27	38
Net periodic benefit cost	$ 22	$ 15	$ 24	$ 53

Employee Benefit Plans - Employ

Employee Benefit Plans - Employer Contributions (Details) - 9 months ended Sep. 30, 2019 £ in Millions, $ in Millions	USD ($)	GBP (£)	GBP (£)
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, expected contributions in current fiscal year	$ 1
Employer contributions	0
UNITED STATES | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, expected contributions in current fiscal year	13
Employer contributions	9
UNITED KINGDOM | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, expected contributions in current fiscal year | £			£ 44
Employer contributions	$ 42	£ 33

Employee Benefit Plans Employee

Employee Benefit Plans Employee Benefit Plans - PacifiCorp (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 1	$ 1	$ 6	$ 6
Interest cost	6	7	20	19
Expected return on plan assets	(10)	(9)	(30)	(31)
Net amortization	0	(3)	(3)	(9)
Net periodic benefit cost	(3)	(4)	(7)	(15)
PacifiCorp [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	0	0	1	1
Interest cost	3	3	9	9
Expected return on plan assets	(6)	(5)	(16)	(16)
Net amortization	1	(1)	1	(4)
Net periodic benefit cost	(2)	(3)	(5)	(10)
UNITED STATES | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	4	5	12	15
Interest cost	27	26	82	78
Expected return on plan assets	(38)	(41)	(115)	(123)
Net amortization	8	8	24	23
Net periodic benefit cost	1	(2)	3	(7)
UNITED STATES | PacifiCorp [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	0	0	0	0
Interest cost	11	11	33	32
Expected return on plan assets	(17)	(18)	(50)	(54)
Net amortization	3	3	9	10
Net periodic benefit cost	$ (3)	$ (4)	$ (8)	$ (12)

Employee Benefit Plans Employ_2

Employee Benefit Plans Employee Benefit Plans - PacifiCorp - Employer Contributions (Details) $ in Millions	9 Months Ended
	Sep. 30, 2019USD ($)
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, expected contributions in current fiscal year	$ 1
Employer contributions	0
PacifiCorp [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, expected contributions in current fiscal year	0
Employer contributions	0
UNITED STATES | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, expected contributions in current fiscal year	13
Employer contributions	9
UNITED STATES | PacifiCorp [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, expected contributions in current fiscal year	4
Employer contributions	$ 3

Employee Benefit Plans - MEC (D

Employee Benefit Plans - MEC (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Pension Plan [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 4	$ 5	$ 12	$ 15
Interest cost	27	26	82	78
Expected return on plan assets	(38)	(41)	(115)	(123)
Net amortization	8	8	24	23
Net periodic benefit cost	1	(2)	3	(7)
Pension Plan [Member] | UNITED STATES | MidAmerican Energy Company [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	2	2	5	6
Interest cost	7	7	22	21
Expected return on plan assets	(10)	(11)	(31)	(33)
Net amortization	0	1	0	2
Net periodic benefit cost	(1)	(1)	(4)	(4)
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	1	1	6	6
Interest cost	6	7	20	19
Expected return on plan assets	(10)	(9)	(30)	(31)
Net amortization	0	(3)	(3)	(9)
Net periodic benefit cost	(3)	(4)	(7)	(15)
Other Postretirement Benefits Plan [Member] | MidAmerican Energy Company [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	1	1	4	4
Interest cost	2	2	7	6
Expected return on plan assets	(3)	(3)	(9)	(10)
Net amortization	(1)	(1)	(3)	(3)
Net periodic benefit cost	$ (1)	$ (1)	$ (1)	$ (3)

Employee Benefit Plans Employ_3

Employee Benefit Plans Employee Benefit Plans - MEC - Employer Contributions (Details) $ in Millions	9 Months Ended
	Sep. 30, 2019USD ($)
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, expected contributions in current fiscal year	$ 1
Employer contributions	0
MidAmerican Energy Company [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, expected contributions in current fiscal year	1
Employer contributions	0
UNITED STATES | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, expected contributions in current fiscal year	13
Employer contributions	9
UNITED STATES | MidAmerican Energy Company [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, expected contributions in current fiscal year	7
Employer contributions	$ 5

Employee Benefit Plans - NPC -

Employee Benefit Plans - NPC - Amounts Payable (Details) - Nevada Power Company [Member] - UNITED STATES - NV Energy, Inc. [Member] - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018
Other Noncurrent Liabilities [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Liability, Defined Benefit Plan, Noncurrent	$ 26	$ 26
Other Noncurrent Liabilities [Member] | Other Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Liability, Defined Benefit Plan, Noncurrent	9	9
Other Noncurrent Liabilities [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Liability, Defined Benefit Plan, Noncurrent	1	1
Other Current Liabilities [Member] | Other Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Liability, Defined Benefit Plan, Current	$ 1	$ 1

Employee Benefit Plans - SPPC -

Employee Benefit Plans - SPPC - Amounts Payable (Details) - Sierra Pacific Power Company [Member] - UNITED STATES - NV Energy, Inc. [Member] - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018
Other Noncurrent Liabilities [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Liability, Defined Benefit Plan, Noncurrent	$ 18	$ 19
Other Noncurrent Liabilities [Member] | Other Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Liability, Defined Benefit Plan, Noncurrent	7	7
Other Noncurrent Liabilities [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Liability, Defined Benefit Plan, Noncurrent	13	13
Other Current Liabilities [Member] | Other Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Liability, Defined Benefit Plan, Current	$ 1	$ 1

Asset Retirement Obligation A_3

Asset Retirement Obligation Asset Retirement Obligations - MEC - Asset Retirement Obligations By Type (Details) - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018
MidAmerican Energy Company [Member]
Asset Retirement Obligations By Type [Line Items]
Asset Retirement Obligation	$ 824	$ 562

Asset Retirement Obligation A_4

Asset Retirement Obligation Asset Retirement Obligations - MEC - Change in Asset Retirement Obligations (Details) - MidAmerican Energy Company [Member] - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2019	Dec. 31, 2018
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Asset Retirement Obligation	$ 562
Asset Retirement Obligation, Revision of Estimate	237
Asset Retirement Obligation, Liabilities Incurred	5
Asset Retirement Obligation, Liabilities Settled	(2)
Asset Retirement Obligation, Accretion Expense	22
Asset Retirement Obligation	824
Asset Retirement Obligations, Noncurrent	789	$ 552
Fossil Fuel Plant [Member]
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Asset Retirement Obligation, Revision of Estimate	$ 237

Asset Retirement Obligation A_5

Asset Retirement Obligation Asset Retirement Obligations (Details) - MidAmerican Energy Company [Member] $ in Millions	9 Months Ended
	Sep. 30, 2019USD ($)
Asset Retirement Obligations Disclosure [Line Items]
Asset Retirement Obligation, Revision of Estimate	$ 237
Fossil Fuel Plant [Member]
Asset Retirement Obligations Disclosure [Line Items]
Asset Retirement Obligation, Revision of Estimate	$ 237

Risk Management and Hedging A_3

Risk Management and Hedging Activities - PacifiCorp - Balance Sheet Location (Details) - PacifiCorp [Member] - Commodity derivative [Member] - USD ($) $ in Millions	Sep. 30, 2019	Jun. 30, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Dec. 31, 2017
Derivatives, Fair Value [Line Items]
Derivative, fair value, net	$ (82)		$ (97)
Cash collateral, net receivable, offset against derivative positions	54		59
Derivative assets (liabilities), at fair value, net	(28)		(38)
Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative, fair value, net	5		27
Cash collateral, net receivable, offset against derivative positions	0		(2)
Derivative assets (liabilities), at fair value, net	5		25
Other Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative, fair value, net	1		3
Cash collateral, net receivable, offset against derivative positions	0		0
Derivative assets (liabilities), at fair value, net	1		3
Other Current Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative, fair value, net	(30)		(57)
Cash collateral, net receivable, offset against derivative positions	20		16
Derivative assets (liabilities), at fair value, net	(10)		(41)
Other Noncurrent Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative, fair value, net	(58)		(70)
Cash collateral, net receivable, offset against derivative positions	34		45
Derivative assets (liabilities), at fair value, net	(24)		(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	13		51
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement	(95)		(148)
Derivative, fair value, net	(82)		(97)
Net Regulatory Asset (Liability), Unrealized Loss (Gain) On Derivative Contracts	81	$ 101	96	$ 102	$ 116	$ 101
Not Designated as Hedging Instrument [Member] | Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative asset, fair value, gross asset including not subject to master netting arrangement	7		36
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement	(2)		(9)
Derivative, fair value, net	5		27
Not Designated as Hedging Instrument [Member] | Other Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative asset, fair value, gross asset including not subject to master netting arrangement	1		4
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement	0		(1)
Derivative, fair value, net	1		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	(34)		(67)
Derivative, fair value, net	(30)		(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	1		1
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement	(59)		(71)
Derivative, fair value, net	$ (58)		$ (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 derivative [Member] - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Regulatory Assets (Liabilities), Net, Unrealized Loss (Gain), Net, on Derivative Instruments [Line Items]
Beginning balance	$ 101	$ 116	$ 96	$ 101
Changes in fair value recognized in net regulatory assets	16	14	(12)	48
Net (losses) gains reclassified to operating revenue	(11)	(36)	(27)	(30)
Net Gains (Losses) Reclassified To Cost Of Domestic Regulated Electric	(25)	8	24	(17)
Ending balance	$ 81	$ 102	$ 81	$ 102

Risk Management and Hedging A_5

Risk Management and Hedging Activities - PacifiCorp - Derivative Contract Volumes (Details) - PacifiCorp [Member] - Commodity derivative [Member] MWh in Millions, Dth in Millions	Sep. 30, 2019DthMWh	Dec. 31, 2018DthMWh
Electricity sales, net
Notional Amounts of Outstanding Derivative Positions [Line Items]
Derivative, Nonmonetary Notional Amount | MWh	3	6
Natural gas purchases
Notional Amounts of Outstanding Derivative Positions [Line Items]
Derivative, Nonmonetary Notional Amount | Dth	108	117

Risk Management and Hedging A_6

Risk Management and Hedging Activities - PacifiCorp - Collateral and Contingent Features (Details) - PacifiCorp [Member] - Commodity derivative [Member] - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018
Derivative [Line Items]
Derivative, net liability position, aggregate fair value	$ 92	$ 113
Collateral already posted, aggregate fair value	54	61
Additional collateral, aggregate fair value	$ 31	$ 35

Fair Value Measurements (Detail

Fair Value Measurements (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Jun. 30, 2019	Dec. 31, 2018	Jun. 30, 2018	Dec. 31, 2017
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	$ (25)		$ (25)			$ (52)
Assets, fair value disclosure	3,917		3,917			3,114
Derivative liability, fair value, gross asset and right to reclaim cash, offset	101		101			111
Derivative liabilities	(96)		(96)			(111)
Cash collateral, net receivable, offset against derivative positions	76		76			59
Recurring [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value disclosure	2,649		2,649			2,423
Derivative liabilities	(6)		(6)			(1)
Recurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value disclosure	1,167		1,167			625
Derivative liabilities	(163)		(163)			(212)
Recurring [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value disclosure	126		126			118
Derivative liabilities	(28)		(28)			(9)
Mortgage Loans on Real Estate [Member] | Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgages Held-for-sale, Fair Value Disclosure	1,060		1,060			468
Mortgage Loans on Real Estate [Member] | Recurring [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgages Held-for-sale, Fair Value Disclosure	0		0			0
Mortgage Loans on Real Estate [Member] | Recurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgages Held-for-sale, Fair Value Disclosure	1,060		1,060			468
Mortgage Loans on Real Estate [Member] | Recurring [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgages Held-for-sale, Fair Value Disclosure	0		0			0
Money market mutual funds [Member] | Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI	837		837			409
Money market mutual funds [Member] | Recurring [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI	837		837			409
Money market mutual funds [Member] | Recurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI	0		0			0
Money market mutual funds [Member] | Recurring [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI	0		0			0
United States government obligations [Member] | Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	189		189			187
United States government obligations [Member] | Recurring [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	189		189			187
United States government obligations [Member] | Recurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	0		0			0
United States government obligations [Member] | Recurring [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	0		0			0
International government obligations [Member] | Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	5		5			4
International government obligations [Member] | Recurring [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	0		0			0
International government obligations [Member] | Recurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	5		5			4
International government obligations [Member] | Recurring [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	0		0			0
Corporate obligations [Member] | Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	57		57			46
Corporate obligations [Member] | Recurring [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	0		0			0
Corporate obligations [Member] | Recurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	57		57			46
Corporate obligations [Member] | Recurring [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	0		0			0
Municipal obligations [Member] | Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	1		1			2
Municipal obligations [Member] | Recurring [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	0		0			0
Municipal obligations [Member] | Recurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	1		1			2
Municipal obligations [Member] | Recurring [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	0		0			0
US Government-sponsored Enterprises Debt Securities [Member] | Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	1		1			1
US Government-sponsored Enterprises Debt Securities [Member] | Recurring [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	0		0			0
US Government-sponsored Enterprises Debt Securities [Member] | Recurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	1		1			1
US Government-sponsored Enterprises Debt Securities [Member] | Recurring [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	0		0			0
United States companies [Member] | Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI	309		309			256
United States companies [Member] | Recurring [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI	309		309			256
United States companies [Member] | Recurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI	0		0			0
United States companies [Member] | Recurring [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI	0		0			0
International companies [Member] | Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI	1,132		1,132			1,441
International companies [Member] | Recurring [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI	1,132		1,132			1,441
International companies [Member] | Recurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI	0		0			0
International companies [Member] | Recurring [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI	0		0			0
Investment funds [Member] | Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI	182		182			128
Investment funds [Member] | Recurring [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI	182		182			128
Investment funds [Member] | Recurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI	0		0			0
Investment funds [Member] | Recurring [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI	0		0			0
Commodity derivative [Member] | 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	(25)		(25)			(52)
Derivative assets	114		114			148
Derivative liability, fair value, gross asset and right to reclaim cash, offset	101		101			111
Derivative liabilities	(69)		(69)			(79)
Commodity derivative [Member] | Recurring [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative asset, fair value, gross asset including not subject to master netting arrangement	0		0			1
Derivative liability, fair value, gross liability including not subject to master netting arrangement	(3)		(3)			(1)
Commodity derivative [Member] | Recurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative asset, fair value, gross asset including not subject to master netting arrangement	36		36			91
Derivative liability, fair value, gross liability including not subject to master netting arrangement	(142)		(142)			(180)
Commodity derivative [Member] | Recurring [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	103		103			108
Derivative liability, fair value, gross liability including not subject to master netting arrangement	(25)		(25)			(9)
Interest Rate Contract [Member] | Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	30		30			24
Derivative liabilities	(27)		(27)			(32)
Interest Rate Contract [Member] | Recurring [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative asset, fair value, gross asset including not subject to master netting arrangement	0		0			1
Derivative liability, fair value, gross liability including not subject to master netting arrangement	(3)		(3)			0
Interest Rate Contract [Member] | Recurring [Member] | 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	7		7			13
Derivative liability, fair value, gross liability including not subject to master netting arrangement	(21)		(21)			(32)
Interest Rate Contract [Member] | Recurring [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	23		23			10
Derivative liability, fair value, gross liability including not subject to master netting arrangement	(3)		(3)			0
Commodity derivative [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Measurement With Unobservable Inputs Reconciliation, Recurring Basis, Asset (Liability), Net, Value	78	$ 84	78	$ 84	$ 86	99	$ 83	$ 94
Fair Value, Assets and Liabilities Measured on Recurring Basis, Gain (Loss) Included in Earnings	(1)	1	(6)	(3)
Fair Value, Measurements with Unobservable Inputs Reconciliation, Recurring Basis, Gain (Loss) Included In Regulatory Assets and Liabilities, Net	17	(3)	40	11
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases	0	1	4	2
Fair Value, Measurements With Unobservable Inputs Reconciliation, Recurring Basis, Assets and Liability, Net, Settlements	(8)	3	(10)	5
Interest Rate Lock Commitments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Measurement With Unobservable Inputs Reconciliation, Recurring Basis, Asset (Liability), Net, Value	20	10	20	10	$ 23	$ 10	$ 17	$ 9
Fair Value, Assets and Liabilities Measured on Recurring Basis, Gain (Loss) Included in Earnings	(158)	(54)	(305)	(140)
Fair Value, Measurements with Unobservable Inputs Reconciliation, Recurring Basis, Gain (Loss) Included In Regulatory Assets and Liabilities, Net	0	0	0	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases	0	0	0	0
Fair Value, Measurements With Unobservable Inputs Reconciliation, Recurring Basis, Assets and Liability, Net, Settlements	$ 161	$ 61	$ 295	$ 139

Fair Value Measurements - Level

Fair Value Measurements - Level 3 (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Commodity derivative [Member]
Fair Value, Assets (Liabilities), Net, Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	$ 86	$ 83	$ 99	$ 94
Changes included in earnings	1	(1)	6	3
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Other Comprehensive Income (Loss)	0	(1)	1	(1)
Changes in fair value recognized in net regulatory assets	(17)	3	(40)	(11)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases	0	1	4	2
Settlements	8	(3)	10	(5)
Ending balance	78	84	78	84
Interest Rate Lock Commitments [Member]
Fair Value, Assets (Liabilities), Net, Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	23	17	10	9
Changes included in earnings	158	54	305	140
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Other Comprehensive Income (Loss)	0	0	0	0
Changes in fair value recognized in net regulatory assets	0	0	0	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases	0	0	0	0
Settlements	(161)	(61)	(295)	(139)
Ending balance	$ 20	$ 10	$ 20	$ 10

Fair Value Measurements - Debt

Fair Value Measurements - Debt (Details) - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, carrying value	$ 37,909	$ 36,250
Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, fair value	$ 44,979	$ 38,874

Fair Value Measurements - Pacif

Fair Value Measurements - PacifiCorp (Details) - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018
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	$ (25)	$ (52)
Assets, fair value disclosure	3,917	3,114
Derivative liability, fair value, gross asset and right to reclaim cash, offset	101	111
Derivative Liability	(96)	(111)
Cash collateral, net receivable, offset against derivative positions	76	59
Recurring [Member] | 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)
Recurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value disclosure	1,167	625
Derivative Liability	(163)	(212)
Recurring [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value disclosure	126	118
Derivative Liability	(28)	(9)
Commodity derivative [Member] | 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	(25)	(52)
Derivative assets	114	148
Derivative liability, fair value, gross asset and right to reclaim cash, offset	101	111
Derivative Liability	(69)	(79)
Commodity derivative [Member] | Recurring [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	(3)	(1)
Commodity derivative [Member] | Recurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative asset, fair value, gross asset including not subject to master netting arrangement	36	91
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement	(142)	(180)
Commodity derivative [Member] | Recurring [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	103	108
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement	(25)	(9)
Money market mutual funds [Member] | Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI	837	409
Money market mutual funds [Member] | Recurring [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI	837	409
Money market mutual funds [Member] | Recurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI	0	0
Money market mutual funds [Member] | Recurring [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI	0	0
Investment funds [Member] | Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI	182	128
Investment funds [Member] | Recurring [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI	182	128
Investment funds [Member] | Recurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI	0	0
Investment funds [Member] | Recurring [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI	0	0
PacifiCorp [Member] | Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value disclosure	353	121
PacifiCorp [Member] | Recurring [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value disclosure	347	93
PacifiCorp [Member] | Recurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value disclosure	13	51
PacifiCorp [Member] | Recurring [Member] | 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 derivative [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash collateral, net receivable, offset against derivative positions	54	59
PacifiCorp [Member] | Commodity derivative [Member] | 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	(7)	(23)
Derivative assets	6	28
Derivative liability, fair value, gross asset and right to reclaim cash, offset	61	82
Derivative Liability	(34)	(66)
Cash collateral, net receivable, offset against derivative positions	54	59
PacifiCorp [Member] | Commodity derivative [Member] | Recurring [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative asset, fair value, gross asset including not subject to master netting arrangement	0	0
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement	0	0
PacifiCorp [Member] | Commodity derivative [Member] | Recurring [Member] | 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	13	51
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement	(95)	(148)
PacifiCorp [Member] | Commodity derivative [Member] | Recurring [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	0	0
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement	0	0
PacifiCorp [Member] | Money market mutual funds [Member] | Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI	322	69
PacifiCorp [Member] | Money market mutual funds [Member] | Recurring [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI	322	69
PacifiCorp [Member] | Money market mutual funds [Member] | Recurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI	0	0
PacifiCorp [Member] | Money market mutual funds [Member] | Recurring [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI	0	0
PacifiCorp [Member] | Investment funds [Member] | Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI	25	24
PacifiCorp [Member] | Investment funds [Member] | Recurring [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI	25	24
PacifiCorp [Member] | Investment funds [Member] | Recurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI	0	0
PacifiCorp [Member] | Investment funds [Member] | Recurring [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI	$ 0	$ 0

Fair Value Measurements - Pac_2

Fair Value Measurements - PacifiCorp - Debt (Details) - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, carrying value	$ 37,909	$ 36,250
Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, fair value	44,979	38,874
PacifiCorp [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, carrying value	7,657	7,015
PacifiCorp [Member] | Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, fair value	$ 9,392	$ 7,833

Fair Value Measurements - MEC (

Fair Value Measurements - MEC (Details) - Recurring [Member] - USD ($) $ in Millions		Sep. 30, 2019	Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash collateral, net receivable, offset against derivative positions		$ 76	$ 59
Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset		(25)	(52)
Assets, fair value disclosure		3,917	3,114
Derivative liability, fair value, gross asset and right to reclaim cash, offset		101	111
Money market mutual funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		837	409
United States government obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale		189	187
International government obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale		5	4
Corporate obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale		57	46
Municipal obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale		1	2
US Government-sponsored Enterprises Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale		1	1
United States companies [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		309	256
International companies [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		1,132	1,441
Investment funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		182	128
Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value disclosure		2,649	2,423
Level 1 [Member] | Money market mutual funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		837	409
Level 1 [Member] | United States government obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale		189	187
Level 1 [Member] | International government obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale		0	0
Level 1 [Member] | Corporate obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale		0	0
Level 1 [Member] | Municipal obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale		0	0
Level 1 [Member] | US Government-sponsored Enterprises Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale		0	0
Level 1 [Member] | United States companies [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		309	256
Level 1 [Member] | International companies [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		1,132	1,441
Level 1 [Member] | Investment funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		182	128
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value disclosure		1,167	625
Level 2 [Member] | Money market mutual funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		0	0
Level 2 [Member] | United States government obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale		0	0
Level 2 [Member] | International government obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale		5	4
Level 2 [Member] | Corporate obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale		57	46
Level 2 [Member] | Municipal obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale		1	2
Level 2 [Member] | US Government-sponsored Enterprises Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale		1	1
Level 2 [Member] | United States companies [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		0	0
Level 2 [Member] | International companies [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		0	0
Level 2 [Member] | Investment funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		0	0
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value disclosure		126	118
Level 3 [Member] | Money market mutual funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		0	0
Level 3 [Member] | United States government obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale		0	0
Level 3 [Member] | International government obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale		0	0
Level 3 [Member] | Corporate obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale		0	0
Level 3 [Member] | Municipal obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale		0	0
Level 3 [Member] | US Government-sponsored Enterprises Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale		0	0
Level 3 [Member] | United States companies [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		0	0
Level 3 [Member] | International companies [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		0	0
Level 3 [Member] | Investment funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		0	0
Commodity derivative [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		(25)	(52)
Derivative liability, fair value, gross asset and right to reclaim cash, offset		101	111
Commodity derivative [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		(3)	(1)
Commodity derivative [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative asset, fair value, gross asset including not subject to master netting arrangement		36	91
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement		(142)	(180)
Commodity derivative [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		103	108
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement		(25)	(9)
MidAmerican Energy Company [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash collateral, net receivable, offset against derivative positions		1	0
Assets, fair value disclosure		595	517
MidAmerican Energy Company [Member] | Money market mutual funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI	[1]	3	2
MidAmerican Energy Company [Member] | United States government obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale		189	187
MidAmerican Energy Company [Member] | International government obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale		5	4
MidAmerican Energy Company [Member] | Corporate obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale		57	46
MidAmerican Energy Company [Member] | Municipal obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale		1	2
MidAmerican Energy Company [Member] | US Government-sponsored Enterprises Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale		1	1
MidAmerican Energy Company [Member] | United States companies [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		309	256
MidAmerican Energy Company [Member] | International companies [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		8	6
MidAmerican Energy Company [Member] | Investment funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		19	10
MidAmerican Energy Company [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value disclosure		528	461
MidAmerican Energy Company [Member] | Level 1 [Member] | Money market mutual funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI	[1]	3	2
MidAmerican Energy Company [Member] | Level 1 [Member] | United States government obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale		189	187
MidAmerican Energy Company [Member] | Level 1 [Member] | International government obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale		0	0
MidAmerican Energy Company [Member] | Level 1 [Member] | Corporate obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale		0	0
MidAmerican Energy Company [Member] | Level 1 [Member] | Municipal obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale		0	0
MidAmerican Energy Company [Member] | Level 1 [Member] | US Government-sponsored Enterprises Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale		0	0
MidAmerican Energy Company [Member] | Level 1 [Member] | United States companies [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		309	256
MidAmerican Energy Company [Member] | Level 1 [Member] | International companies [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		8	6
MidAmerican Energy Company [Member] | Level 1 [Member] | Investment funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		19	10
MidAmerican Energy Company [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value disclosure		68	57
MidAmerican Energy Company [Member] | Level 2 [Member] | Money market mutual funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI	[1]	0	0
MidAmerican Energy Company [Member] | Level 2 [Member] | United States government obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale		0	0
MidAmerican Energy Company [Member] | Level 2 [Member] | International government obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale		5	4
MidAmerican Energy Company [Member] | Level 2 [Member] | Corporate obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale		57	46
MidAmerican Energy Company [Member] | Level 2 [Member] | Municipal obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale		1	2
MidAmerican Energy Company [Member] | Level 2 [Member] | US Government-sponsored Enterprises Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale		1	1
MidAmerican Energy Company [Member] | Level 2 [Member] | United States companies [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		0	0
MidAmerican Energy Company [Member] | Level 2 [Member] | International companies [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		0	0
MidAmerican Energy Company [Member] | Level 2 [Member] | Investment funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		0
MidAmerican Energy Company [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value disclosure		0	2
MidAmerican Energy Company [Member] | Level 3 [Member] | Money market mutual funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI	[1]	0	0
MidAmerican Energy Company [Member] | Level 3 [Member] | United States government obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale		0	0
MidAmerican Energy Company [Member] | Level 3 [Member] | International government obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale		0	0
MidAmerican Energy Company [Member] | Level 3 [Member] | Corporate obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale		0	0
MidAmerican Energy Company [Member] | Level 3 [Member] | Municipal obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale		0	0
MidAmerican Energy Company [Member] | Level 3 [Member] | US Government-sponsored Enterprises Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale		0	0
MidAmerican Energy Company [Member] | Level 3 [Member] | United States companies [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		0	0
MidAmerican Energy Company [Member] | Level 3 [Member] | International companies [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		0	0
MidAmerican Energy Company [Member] | Level 3 [Member] | Investment funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		0
MidAmerican Energy Company [Member] | Commodity derivative [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		3	3
Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset	[2]	(1)	(3)
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement		(6)	(3)
Derivative liability, fair value, gross asset and right to reclaim cash, offset	[2]	2	3
MidAmerican Energy Company [Member] | Commodity derivative [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative asset, fair value, gross asset including not subject to master netting arrangement		0	0
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement		0	0
MidAmerican Energy Company [Member] | Commodity derivative [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative asset, fair value, gross asset including not subject to master netting arrangement		4	4
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement		(8)	(4)
MidAmerican Energy Company [Member] | Commodity derivative [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		0	2
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement		$ 0	$ (2)
[1]	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.
[2]	Represents netting under master netting arrangements and a net cash collateral receivable of $1 million and $- million as of September 30, 2019 and December 31, 2018, respectively.

Fair Value Measurements - MEC -

Fair Value Measurements - MEC - Debt (Details) - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, carrying value	$ 37,909	$ 36,250
Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, fair value	44,979	38,874
MidAmerican Energy Company [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, carrying value	6,342	5,379
Long-term debt, fair value		$ 5,644
MidAmerican Energy Company [Member] | Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, fair value	$ 7,519

Fair Value Measurements - MidAm

Fair Value Measurements - MidAmerican Funding - Debt (Details) - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, carrying value	$ 37,909	$ 36,250
Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, fair value	44,979	38,874
MidAmerican Funding, LLC and Subsidiaries [Domain]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, carrying value	6,582	5,619
Long-term debt, fair value		$ 5,941
MidAmerican Funding, LLC and Subsidiaries [Domain] | Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, fair value	$ 7,840

Fair Value Measurements - NPC (

Fair Value Measurements - NPC (Details) - Recurring [Member] - USD ($) $ in Millions		Sep. 30, 2019	Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value disclosure		$ 3,917	$ 3,114
Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value disclosure		2,649	2,423
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value disclosure		1,167	625
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value disclosure		126	118
Money market mutual funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		837	409
Money market mutual funds [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		837	409
Money market mutual funds [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		0	0
Money market mutual funds [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		0	0
Investment funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		182	128
Investment funds [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		182	128
Investment funds [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		0	0
Investment funds [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		0	0
Commodity derivative [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		(3)	(1)
Commodity derivative [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative asset, fair value, gross asset including not subject to master netting arrangement		36	91
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement		(142)	(180)
Commodity derivative [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		103	108
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement		(25)	(9)
Nevada Power Company [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value disclosure		263	112
Nevada Power Company [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value disclosure		263	105
Nevada Power Company [Member] | 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] | 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] | Money market mutual funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI	[1]	261	104
Nevada Power Company [Member] | Money market mutual funds [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI	[1]	261	104
Nevada Power Company [Member] | Money market mutual funds [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI	[1]	0	0
Nevada Power Company [Member] | Money market mutual funds [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI	[1]	0	0
Nevada Power Company [Member] | Investment funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		2	1
Nevada Power Company [Member] | Investment funds [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		2	1
Nevada Power Company [Member] | Investment funds [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		0	0
Nevada Power Company [Member] | Investment funds [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		0	0
Nevada Power Company [Member] | Commodity derivative [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			7
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement		(18)	(4)
Nevada Power Company [Member] | Commodity derivative [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
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement		0	0
Nevada Power Company [Member] | Commodity derivative [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative asset, fair value, gross asset including not subject to master netting arrangement			0
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement		0	0
Nevada Power Company [Member] | Commodity derivative [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			7
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement		$ (18)	$ (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 Measurements - NPC -

Fair Value Measurements - NPC - Level 3 (Details) - Nevada Power Company [Member] - Commodity [Member] - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Fair Value, Assets (Liabilities), Net, Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance	$ (11)	$ (9)	$ 3	$ (3)
Fair Value, Measurements with Unobservable Inputs Reconciliation, Recurring Basis, Gain (Loss) Included In Regulatory Assets and Liabilities, Net	13	(2)	30	6
Fair Value, Measurements With Unobservable Inputs Reconciliation, Recurring Basis, Assets and Liability, Net, Settlements	(6)	0	(9)	(2)
Ending balance	$ (18)	$ (7)	$ (18)	$ (7)

Fair Value Measurements - NPC_2

Fair Value Measurements - NPC - Debt (Details) - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, carrying value	$ 37,909	$ 36,250
Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, fair value	44,979	38,874
Nevada Power Company [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, carrying value	2,350	2,353
Nevada Power Company [Member] | Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, fair value	$ 2,891	$ 2,651

Fair Value Measurements Fair Va

Fair Value Measurements Fair Value Measurements - SPPC (Details) - Recurring [Member] - USD ($) $ in Millions		Sep. 30, 2019	Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value disclosure		$ 3,917	$ 3,114
Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value disclosure		2,649	2,423
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value disclosure		1,167	625
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value disclosure		126	118
Money market mutual funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		837	409
Money market mutual funds [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		837	409
Money market mutual funds [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		0	0
Money market mutual funds [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		0	0
Investment funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		182	128
Investment funds [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		182	128
Investment funds [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		0	0
Investment funds [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		0	0
Commodity derivative [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		(3)	(1)
Commodity derivative [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative asset, fair value, gross asset including not subject to master netting arrangement		36	91
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement		(142)	(180)
Commodity derivative [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		103	108
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement		(25)	(9)
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] | 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] | 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] | 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] | Money market mutual funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI	[1]		45
Sierra Pacific Power Company [Member] | Money market mutual funds [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI	[1]		45
Sierra Pacific Power Company [Member] | Money market mutual funds [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI	[1]		0
Sierra Pacific Power Company [Member] | Money market mutual funds [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI	[1]		0
Sierra Pacific Power Company [Member] | Investment funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value disclosure	[2]	56
Sierra Pacific Power Company [Member] | Investment funds [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value disclosure	[2]	56
Sierra Pacific Power Company [Member] | Investment funds [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value disclosure	[2]	0
Sierra Pacific Power Company [Member] | Investment funds [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value disclosure	[2]	0
Sierra Pacific Power Company [Member] | Commodity derivative [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
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement		(4)
Sierra Pacific Power Company [Member] | Commodity derivative [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
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement		0
Sierra Pacific Power Company [Member] | Commodity derivative [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative asset, fair value, gross asset including not subject to master netting arrangement			0
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement		0
Sierra Pacific Power Company [Member] | Commodity derivative [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			$ 2
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement		$ (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.
[2]	(1)Amounts are included in cash and cash equivalents on the Balance Sheets. The fair value of these money market mutual funds approximates cost.

Fair Value Measurements - SPPC

Fair Value Measurements - SPPC - Debt (Details) - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, carrying value	$ 37,909	$ 36,250
Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, fair value	44,979	38,874
Sierra Pacific Power Company [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, carrying value	1,135	1,120
Sierra Pacific Power Company [Member] | Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, fair value	$ 1,270	$ 1,167

Commitments and Contingencies -

Commitments and Contingencies - Commitments (Details) - USD ($) $ in Millions		9 Months Ended
		Sep. 30, 2019	Oct. 01, 2019	Dec. 31, 2018
ContractualObligationFiscalYearMaturityScheduleTable [Line Items]
Operating Leases, Future Minimum Payments Due	[1]			$ 692
Property, Plant and Equipment [Abstract]
Equity Method Investments		$ 3,504		2,440
Property, plant and equipment, net		71,324		68,087
Nevada Power Company [Member]
ContractualObligationFiscalYearMaturityScheduleTable [Line Items]
Operating Leases, Future Minimum Payments Due	[2]			24
PacifiCorp [Member]
ContractualObligationFiscalYearMaturityScheduleTable [Line Items]
Operating Leases, Future Minimum Payments Due				$ 20
PacifiCorp [Member] | Klamath Hydroelectric System [Member]
ContractualObligationFiscalYearMaturityScheduleTable [Line Items]
Dam removal cost limit		200
PacifiCorp [Member] | Klamath Hydroelectric System [Member] | CALIFORNIA
ContractualObligationFiscalYearMaturityScheduleTable [Line Items]
Dam removal cost limit		16
Additional dam removal costs, California bond measure		250
Capital Addition Purchase Commitments [Member] | PacifiCorp and MidAmerican Energy [Member]
ContractualObligationFiscalYearMaturityScheduleTable [Line Items]
Purchase Obligation		1,100
Capital Addition Purchase Commitments [Member] | MidAmerican Energy Company [Member]
ContractualObligationFiscalYearMaturityScheduleTable [Line Items]
Purchase Obligation		337
Capital Addition Purchase Commitments [Member] | PacifiCorp [Member]
ContractualObligationFiscalYearMaturityScheduleTable [Line Items]
Purchase Obligation		754
Maintenance, service and other contracts [Member] | PacifiCorp and MidAmerican Energy [Member]
ContractualObligationFiscalYearMaturityScheduleTable [Line Items]
Purchase Obligation		618
Maintenance, service and other contracts [Member] | MidAmerican Energy Company [Member]
ContractualObligationFiscalYearMaturityScheduleTable [Line Items]
Purchase Obligation		377
Maintenance, service and other contracts [Member] | PacifiCorp [Member]
ContractualObligationFiscalYearMaturityScheduleTable [Line Items]
Purchase Obligation		$ 241
Counterparty Bankruptcy [Member] | Topaz [Member]
ContractualObligationFiscalYearMaturityScheduleTable [Line Items]
Entity Legal Form		1
Property, Plant and Equipment [Abstract]
Revenue, Performance Obligation, Description of Payment Terms		1
Property, plant and equipment, net		$ 1,000
Non-Recourse Debt		$ 900
Counterparty Bankruptcy [Member] | Agua Caliente [Member]
ContractualObligationFiscalYearMaturityScheduleTable [Line Items]
Equity Method Investment, Ownership Percentage		49.00%
Property, Plant and Equipment [Abstract]
Revenue, Performance Obligation, Description of Payment Terms		1
Equity Method Investments		$ 70
Non-Recourse Debt		800
Easements [Member] | PacifiCorp and MidAmerican Energy [Member]
ContractualObligationFiscalYearMaturityScheduleTable [Line Items]
Operating Leases, Future Minimum Payments Due		593
Easements [Member] | MidAmerican Energy Company [Member]
ContractualObligationFiscalYearMaturityScheduleTable [Line Items]
Operating Leases, Future Minimum Payments Due		341
Easements [Member] | PacifiCorp [Member]
ContractualObligationFiscalYearMaturityScheduleTable [Line Items]
Operating Leases, Future Minimum Payments Due		$ 252
Subsequent Event [Member] | Fuel, capacity and transmission contract commitments [Member] | Nevada Power Company [Member]
ContractualObligationFiscalYearMaturityScheduleTable [Line Items]
Purchase Obligation, Future Minimum Payments, Remainder of Fiscal Year, Terminated			$ 60
Purchase Obligation, Due in Second Year, Terminated			60
Purchase Obligation, Due in Third Year, Terminated			60
Purchase Obligation, Due in Fourth Year, Terminated			60
Purchase Obligation, Due in Fifth Year, Terminated			60
Purchase Obligation, Due after Fifth Year, Terminated			$ 1,145
[1]	(1) Amounts included for comparability and accounted for in accordance with ASC 840, "Leases".
[2]	Amounts included for comparability and accounted for in accordance with ASC Topic 840, "Leases".

Commitments and Contingencies C

Commitments and Contingencies Commitments and Contingencies - PAC - Commitments (Details) - PacifiCorp [Member] $ in Millions	Sep. 30, 2019USD ($)
Capital Addition Purchase Commitments [Member]
ContractualObligationFiscalYearMaturityScheduleTable [Line Items]
Purchase Obligation	$ 754
Maintenance, service and other contracts [Member]
ContractualObligationFiscalYearMaturityScheduleTable [Line Items]
Purchase Obligation	241
Easements [Member]
ContractualObligationFiscalYearMaturityScheduleTable [Line Items]
Operating Leases, Future Minimum Payments Due	$ 252

Commitments and Contingencies_2

Commitments and Contingencies Commitments and Contingencies - PacifiCorp - Hydroelectric (Details) - PacifiCorp [Member] - Klamath Hydroelectric System [Member] $ in Millions	9 Months Ended
	Sep. 30, 2019USD ($)
Hydroelectric [Line Items]
Dam removal cost limit	$ 200
CALIFORNIA
Hydroelectric [Line Items]
Additional dam removal costs, California bond measure	250
Dam removal cost limit	$ 16

Commitments and Contingencies_3

Commitments and Contingencies Commitments and Contingencies - MEC- Commitments (Details) - MidAmerican Energy Company [Member] $ in Millions	Sep. 30, 2019USD ($)
Capital Addition Purchase Commitments [Member]
ContractualObligationFiscalYearMaturityScheduleTable [Line Items]
Purchase Obligation	$ 337
Maintenance, service and other contracts [Member]
ContractualObligationFiscalYearMaturityScheduleTable [Line Items]
Purchase Obligation	377
Easements [Member]
ContractualObligationFiscalYearMaturityScheduleTable [Line Items]
Operating Leases, Future Minimum Payments Due	$ 341

Commitments and Contingencies_4

Commitments and Contingencies Commitments and Contingencies - MEC - Transmission Rates (Details) - MidAmerican Energy Company [Member] - Electric Transmission [Member] $ in Millions	9 Months Ended
	Sep. 30, 2019USD ($)
Loss Contingencies [Line Items]
Public Utilities, Approved Return on Equity Adder, Percentage	0.50%
Unfavorable Regulatory Action [Member]
Loss Contingencies [Line Items]
Accrued liability for estimated transmission billings refunds	$ 10
Prior to September 2016 [Member]
Loss Contingencies [Line Items]
Public Utilities, Approved Return on Equity, Percentage	12.38%
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%
February 2015 through May 2016 [Member]
Loss Contingencies [Line Items]
Public Utilities, Intervenor Proposed Return On Equity, Percentage	8.67%

Commitments and Contingencies_5

Commitments and Contingencies Commitments and Contingencies - NPC (Details) - Nevada Power Company [Member] - Fuel, capacity and transmission contract commitments [Member] - Subsequent Event [Member] $ in Millions	Oct. 01, 2019USD ($)
ContractualObligationFiscalYearMaturityScheduleTable [Line Items]
Purchase Obligation, Future Minimum Payments, Remainder of Fiscal Year, Terminated	$ 60
Purchase Obligation, Due in Second Year, Terminated	60
Purchase Obligation, Due in Third Year, Terminated	60
Purchase Obligation, Due in Fourth Year, Terminated	60
Purchase Obligation, Due in Fifth Year, Terminated	60
Purchase Obligation, Due after Fifth Year, Terminated	$ 1,145

Revenue from Contracts with C_3

Revenue from Contracts with Customers Revenue from Contracts with Customers (Details) - USD ($) $ in Millions		3 Months Ended				9 Months Ended
		Sep. 30, 2019		Sep. 30, 2018		Sep. 30, 2019		Sep. 30, 2018
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		$ 4,213		$ 4,270		$ 11,329		$ 11,358
Operating revenue		5,644		5,637		15,148		15,070
Non-contracts with customer revenue [Member]
Disaggregation of Revenue [Line Items]
Operating revenue		124		149		400		460
Electricity and natural gas [Member]
Disaggregation of Revenue [Line Items]
Operating revenue		4,337		4,419		11,729		11,818
PacifiCorp [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		1,354		1,343		3,736		3,637
Operating revenue		1,367		1,369		3,793		3,746
PacifiCorp [Member] | Non-contracts with customer revenue [Member]
Disaggregation of Revenue [Line Items]
Operating revenue		13		26		57		109
MidAmerican Funding [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		793		828		2,281		2,279
Operating revenue		797		832		2,299		2,297
MidAmerican Funding [Member] | Non-contracts with customer revenue [Member]
Disaggregation of Revenue [Line Items]
Operating revenue		4		4		18		18
NV Energy, Inc. [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		1,047		1,052		2,367		2,405
Operating revenue		1,054		1,059		2,389		2,426
NV Energy, Inc. [Member] | Non-contracts with customer revenue [Member]
Disaggregation of Revenue [Line Items]
Operating revenue		7		7		22		21
Northern Powergrid Holdings [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		204		206		661		692
Operating revenue		230		233		736		757
Northern Powergrid Holdings [Member] | Non-contracts with customer revenue [Member]
Disaggregation of Revenue [Line Items]
Operating revenue		26		27		75		65
BHE Pipeline Group [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		221		283		805		893
Operating revenue		226		259		809		871
BHE Pipeline Group [Member] | Non-contracts with customer revenue [Member]
Disaggregation of Revenue [Line Items]
Operating revenue	[1]	5		(24)		4		(22)
BHE Transmission [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		184		174		527		531
Operating revenue		184		174		527		531
BHE Transmission [Member] | Non-contracts with customer revenue [Member]
Disaggregation of Revenue [Line Items]
Operating revenue		0		0		0		0
BHE Renewables [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		276		235		599		538
Operating revenue		329		320		745		720
BHE Renewables [Member] | Non-contracts with customer revenue [Member]
Disaggregation of Revenue [Line Items]
Operating revenue		53		85		146		182
Berkshire Hathaway Energy And Other [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		134	[2]	149	[2]	353	[2]	383
Operating revenue		150	[2]	173	[2]	431	[2]	470
Berkshire Hathaway Energy And Other [Member] | Non-contracts with customer revenue [Member]
Disaggregation of Revenue [Line Items]
Operating revenue		16	[2]	24	[2]	78	[2]	87
Regulated Operation [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		3,753		3,844		10,223		10,297
Regulated Operation [Member] | Regulated retail electric [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		2,968		2,971		7,356		7,303
Regulated Operation [Member] | Regulated retail gas [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		77		96		490		500
Regulated Operation [Member] | Regulated wholesale [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		69		80		311		306
Regulated Operation [Member] | Regulated transmission and distribution [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		443		439		1,346		1,385
Regulated Operation [Member] | Regulated interstate pipeline [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		196		258		719		802
Regulated Operation [Member] | Other customer revenue [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		0		0		1		1
Regulated Operation [Member] | PacifiCorp [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		1,354		1,343		3,736		3,637
Regulated Operation [Member] | PacifiCorp [Member] | Regulated retail electric [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		1,320		1,323		3,613		3,534
Regulated Operation [Member] | PacifiCorp [Member] | Regulated retail gas [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		0		0		0		0
Regulated Operation [Member] | PacifiCorp [Member] | Regulated wholesale [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		8		(10)	[3]	47		21
Regulated Operation [Member] | PacifiCorp [Member] | Regulated transmission and distribution [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		26		30		76		82
Regulated Operation [Member] | PacifiCorp [Member] | Regulated interstate pipeline [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		0		0		0		0
Regulated Operation [Member] | PacifiCorp [Member] | Other customer revenue [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		0		0		0		0
Regulated Operation [Member] | MidAmerican Funding [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		784		826		2,256		2,272
Regulated Operation [Member] | MidAmerican Funding [Member] | Regulated retail electric [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		651		647		1,561		1,538
Regulated Operation [Member] | MidAmerican Funding [Member] | Regulated retail gas [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		61		83		416		428
Regulated Operation [Member] | MidAmerican Funding [Member] | Regulated wholesale [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		56		82		232		262
Regulated Operation [Member] | MidAmerican Funding [Member] | Regulated transmission and distribution [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		16		14		47		44
Regulated Operation [Member] | MidAmerican Funding [Member] | Regulated interstate pipeline [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		0		0		0		0
Regulated Operation [Member] | MidAmerican Funding [Member] | Other customer revenue [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		0		0		0		0
Regulated Operation [Member] | NV Energy, Inc. [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		1,047		1,052		2,367		2,404
Regulated Operation [Member] | NV Energy, Inc. [Member] | Regulated retail electric [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		998		1,002		2,183		2,232
Regulated Operation [Member] | NV Energy, Inc. [Member] | Regulated retail gas [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		16		13		74		72
Regulated Operation [Member] | NV Energy, Inc. [Member] | Regulated wholesale [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		6		9		34		26
Regulated Operation [Member] | NV Energy, Inc. [Member] | Regulated transmission and distribution [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		27		28		75		73
Regulated Operation [Member] | NV Energy, Inc. [Member] | Regulated interstate pipeline [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		0		0		0		0
Regulated Operation [Member] | NV Energy, Inc. [Member] | Other customer revenue [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		0		0		1		1
Regulated Operation [Member] | Northern Powergrid Holdings [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		195		196		634		661
Regulated Operation [Member] | Northern Powergrid Holdings [Member] | Regulated retail electric [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		0		0		0		0
Regulated Operation [Member] | Northern Powergrid Holdings [Member] | Regulated retail gas [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		0		0		0		0
Regulated Operation [Member] | Northern Powergrid Holdings [Member] | Regulated wholesale [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		0		0		0		0
Regulated Operation [Member] | Northern Powergrid Holdings [Member] | Regulated transmission and distribution [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		195		196		634		661
Regulated Operation [Member] | Northern Powergrid Holdings [Member] | Regulated interstate pipeline [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		0		0		0		0
Regulated Operation [Member] | Northern Powergrid Holdings [Member] | Other customer revenue [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		0		0		0		0
Regulated Operation [Member] | BHE Pipeline Group [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		221		283		805		893
Regulated Operation [Member] | BHE Pipeline Group [Member] | Regulated retail electric [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		0		0		0		0
Regulated Operation [Member] | BHE Pipeline Group [Member] | Regulated retail gas [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		0		0		0		0
Regulated Operation [Member] | BHE Pipeline Group [Member] | Regulated wholesale [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		0		0		0		0
Regulated Operation [Member] | BHE Pipeline Group [Member] | Regulated transmission and distribution [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		0		0		0		0
Regulated Operation [Member] | BHE Pipeline Group [Member] | Regulated interstate pipeline [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		221		283		805		893
Regulated Operation [Member] | BHE Pipeline Group [Member] | Other customer revenue [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		0		0		0		0
Regulated Operation [Member] | BHE Transmission [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		179		171		514		525
Regulated Operation [Member] | BHE Transmission [Member] | Regulated retail electric [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		0		0		0		0
Regulated Operation [Member] | BHE Transmission [Member] | Regulated retail gas [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		0		0		0		0
Regulated Operation [Member] | BHE Transmission [Member] | Regulated wholesale [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		0		0		0		0
Regulated Operation [Member] | BHE Transmission [Member] | Regulated transmission and distribution [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		179		171		514		525
Regulated Operation [Member] | BHE Transmission [Member] | Regulated interstate pipeline [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		0		0		0		0
Regulated Operation [Member] | BHE Transmission [Member] | Other customer revenue [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		0		0		0		0
Regulated Operation [Member] | BHE Renewables [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		0		0		0		0
Regulated Operation [Member] | BHE Renewables [Member] | Regulated retail electric [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		0		0		0		0
Regulated Operation [Member] | BHE Renewables [Member] | Regulated retail gas [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		0		0		0		0
Regulated Operation [Member] | BHE Renewables [Member] | Regulated wholesale [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		0		0		0		0
Regulated Operation [Member] | BHE Renewables [Member] | Regulated transmission and distribution [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		0		0		0		0
Regulated Operation [Member] | BHE Renewables [Member] | Regulated interstate pipeline [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		0		0		0		0
Regulated Operation [Member] | BHE Renewables [Member] | Other customer revenue [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		0		0		0		0
Regulated Operation [Member] | Berkshire Hathaway Energy And Other [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		(27)	[2]	(27)	[2]	(89)	[2]	(95)
Regulated Operation [Member] | Berkshire Hathaway Energy And Other [Member] | Regulated retail electric [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		(1)	[2]	(1)	[2]	(1)	[2]	(1)
Regulated Operation [Member] | Berkshire Hathaway Energy And Other [Member] | Regulated retail gas [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		0	[2]	0	[2]	0	[2]	0
Regulated Operation [Member] | Berkshire Hathaway Energy And Other [Member] | Regulated wholesale [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		(1)	[2]	(1)	[2]	(2)	[2]	(3)
Regulated Operation [Member] | Berkshire Hathaway Energy And Other [Member] | Regulated transmission and distribution [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		0	[2]	0	[2]	0	[2]	0
Regulated Operation [Member] | Berkshire Hathaway Energy And Other [Member] | Regulated interstate pipeline [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		(25)	[2]	(25)	[2]	(86)	[2]	(91)
Regulated Operation [Member] | Berkshire Hathaway Energy And Other [Member] | Other customer revenue [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		0	[2]	0	[2]	0	[2]	0
Unregulated Operation [Member] | Nonregulated products and services [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		460		426		1,106		1,061
Unregulated Operation [Member] | PacifiCorp [Member] | Nonregulated products and services [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		0		0		0		0
Unregulated Operation [Member] | MidAmerican Funding [Member] | Nonregulated products and services [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		9		2		25		7
Unregulated Operation [Member] | NV Energy, Inc. [Member] | Nonregulated products and services [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		0		0		0		1
Unregulated Operation [Member] | Northern Powergrid Holdings [Member] | Nonregulated products and services [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		9		10		27		31
Unregulated Operation [Member] | BHE Pipeline Group [Member] | Nonregulated products and services [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		0		0		0		0
Unregulated Operation [Member] | BHE Transmission [Member] | Nonregulated products and services [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		5		3		13		6
Unregulated Operation [Member] | BHE Renewables [Member] | Nonregulated products and services [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		276		235		599		538
Unregulated Operation [Member] | Berkshire Hathaway Energy And Other [Member] | Nonregulated products and services [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		161	[2]	176	[2]	442	[2]	478
PacifiCorp [Member]
Disaggregation of Revenue [Line Items]
Operating revenue		1,367		1,369		3,793		3,746
PacifiCorp [Member] | Non-contracts with customer revenue [Member]
Disaggregation of Revenue [Line Items]
Operating revenue		13		26		57		109
PacifiCorp [Member] | Regulated Operation [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		1,354		1,343		3,736		3,637
PacifiCorp [Member] | Regulated Operation [Member] | Regulated retail electric [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		1,303		1,307		3,558		3,479
PacifiCorp [Member] | Regulated Operation [Member] | Regulated wholesale [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		8		(10)	[4]	47		21
PacifiCorp [Member] | Regulated Operation [Member] | Regulated transmission and distribution [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		26		30		76		82
PacifiCorp [Member] | Regulated Operation [Member] | Other customer revenue [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		$ 17		$ 16		$ 55		$ 55
[1]	(3)Includes net payments to counterparties for the financial settlement of certain derivative contracts at BHE Pipeline Group.
[2]	(1)The BHE and Other reportable segment represents amounts related principally to other entities, corporate functions and intersegment eliminations.
[3]	(2)Includes net payments to counterparties for the financial settlement of certain non-derivative forward contracts for energy sales at PacifiCorp.
[4]	(1)Includes net payments to counterparties for the financial settlement of certain non-derivative forward contracts for energy sales.

Revenue from Contracts with C_4

Revenue from Contracts with Customers Revenue from Contracts with Customers - Real Estate Services (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 4,213	$ 4,270	$ 11,329	$ 11,358
Operating revenue	5,644	5,637	15,148	15,070
Residential real estate brokerage and mortgage businesses [Member]
Disaggregation of Revenue [Line Items]
Operating revenue	1,307	1,218	3,419	3,252
Non-contracts with customer revenue [Member]
Disaggregation of Revenue [Line Items]
Operating revenue	124	149	400	460
HomeServices [Member]
Disaggregation of Revenue [Line Items]
Operating revenue	1,307	1,218	3,419	3,252
HomeServices [Member] | Residential real estate brokerage [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	1,172	1,122	3,087	2,975
HomeServices [Member] | Residential real estate brokerage and mortgage businesses [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	1,192	1,140	3,140	3,027
Operating revenue	1,307	1,218	3,419	3,252
HomeServices [Member] | Real estate franchise [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	20	18	53	52
HomeServices [Member] | Non-contracts with customer revenue [Member]
Disaggregation of Revenue [Line Items]
Operating revenue	$ 115	$ 78	$ 279	$ 225

Revenue from Contracts with C_5

Revenue from Contracts with Customers Revenue from Contracts with Customers - Remaining Performance Obligation (Details) - BHE Pipeline Group [Member] $ in Millions	Sep. 30, 2019USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-10-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	$ 922
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-10-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	5,309
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	$ 6,231

Revenue from Contracts with C_6

Revenue from Contracts with Customers Revenue from Contracts with Customers - PAC - Customer Revenue (Details) - USD ($) $ in Millions	3 Months Ended			9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018		Sep. 30, 2019	Sep. 30, 2018
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 4,213	$ 4,270		$ 11,329	$ 11,358
Operating revenue	5,644	5,637		15,148	15,070
Non-contracts with customer revenue [Member]
Disaggregation of Revenue [Line Items]
Operating revenue	124	149		400	460
Regulated Operation [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	3,753	3,844		10,223	10,297
Regulated Operation [Member] | Regulated retail electric [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	2,968	2,971		7,356	7,303
Regulated Operation [Member] | Regulated wholesale [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	69	80		311	306
Regulated Operation [Member] | Regulated transmission and distribution [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	443	439		1,346	1,385
Regulated Operation [Member] | Other customer revenue [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0	0		1	1
PacifiCorp [Member]
Disaggregation of Revenue [Line Items]
Operating revenue	1,367	1,369		3,793	3,746
PacifiCorp [Member] | Non-contracts with customer revenue [Member]
Disaggregation of Revenue [Line Items]
Operating revenue	13	26		57	109
PacifiCorp [Member] | Regulated Operation [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	1,354	1,343		3,736	3,637
PacifiCorp [Member] | Regulated Operation [Member] | Regulated retail electric [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	1,303	1,307		3,558	3,479
PacifiCorp [Member] | Regulated Operation [Member] | Regulated retail electric [Member] | Residential [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	478	478		1,316	1,284
PacifiCorp [Member] | Regulated Operation [Member] | Regulated retail electric [Member] | Commercial [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	419	418		1,152	1,129
PacifiCorp [Member] | Regulated Operation [Member] | Regulated retail electric [Member] | Industrial [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	306	305		887	862
PacifiCorp [Member] | Regulated Operation [Member] | Regulated retail electric [Member] | Other [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	100	106		203	204
PacifiCorp [Member] | Regulated Operation [Member] | Regulated wholesale [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	8	(10)	[1]	47	21
PacifiCorp [Member] | Regulated Operation [Member] | Regulated transmission and distribution [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	26	30		76	82
PacifiCorp [Member] | Regulated Operation [Member] | Other customer revenue [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 17	$ 16		$ 55	$ 55
[1]	(1)Includes net payments to counterparties for the financial settlement of certain non-derivative forward contracts for energy sales.

Revenue from Contracts with C_7

Revenue from Contracts with Customers Revenue from Contracts with Customers - MEC (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		$ 4,213	$ 4,270	$ 11,329	$ 11,358
Operating revenue		5,644	5,637	15,148	15,070
Non-contracts with customer revenue [Member]
Disaggregation of Revenue [Line Items]
Operating revenue		124	149	400	460
Regulated Operation [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		3,753	3,844	10,223	10,297
Regulated Operation [Member] | Regulated retail electric [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		2,968	2,971	7,356	7,303
Regulated Operation [Member] | Regulated retail gas [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		77	96	490	500
Regulated Operation [Member] | Regulated wholesale [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		69	80	311	306
Regulated Operation [Member] | Other customer revenue [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		0	0	1	1
MidAmerican Energy Company [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		793	828	2,279	2,277
Operating revenue		796	832	2,297	2,295
MidAmerican Energy Company [Member] | Non-contracts with customer revenue [Member]
Disaggregation of Revenue [Line Items]
Operating revenue		3	4	18	18
MidAmerican Energy Company [Member] | Regulated electric
Disaggregation of Revenue [Line Items]
Operating revenue		712	727	1,792	1,785
MidAmerican Energy Company [Member] | Regulated natural gas
Disaggregation of Revenue [Line Items]
Operating revenue		76	103	482	505
MidAmerican Energy Company [Member] | Corporate and Other [Member]
Disaggregation of Revenue [Line Items]
Operating revenue		8	2	23	5
MidAmerican Energy Company [Member] | Regulated Operation [Member] | Regulated retail [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		712	730	1,977	1,967
MidAmerican Energy Company [Member] | Regulated Operation [Member] | Regulated retail [Member] | Residential [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		269	287	829	854
MidAmerican Energy Company [Member] | Regulated Operation [Member] | Regulated retail [Member] | Commercial [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		111	117	350	351
MidAmerican Energy Company [Member] | Regulated Operation [Member] | Regulated retail [Member] | Industrial [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		277	271	653	621
MidAmerican Energy Company [Member] | Regulated Operation [Member] | Regulated retail [Member] | Natural gas distribution, transportation-only services [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		7	8	27	27
MidAmerican Energy Company [Member] | Regulated Operation [Member] | Regulated retail [Member] | Other [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	[1]	48	47	118	114
MidAmerican Energy Company [Member] | Regulated Operation [Member] | Regulated wholesale [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		56	82	232	262
MidAmerican Energy Company [Member] | Regulated Operation [Member] | Electricity Transmission [Member] | Multi value transmission projects [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		17	14	47	43
MidAmerican Energy Company [Member] | Regulated Operation [Member] | Regulated electric
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		709	723	1,776	1,769
Operating revenue		712	727	1,792	1,785
MidAmerican Energy Company [Member] | Regulated Operation [Member] | Regulated electric | Regulated retail electric [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		651	647	1,561	1,539
MidAmerican Energy Company [Member] | Regulated Operation [Member] | Regulated electric | Regulated retail electric [Member] | Residential [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		228	233	547	567
MidAmerican Energy Company [Member] | Regulated Operation [Member] | Regulated electric | Regulated retail electric [Member] | Commercial [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		101	100	255	251
MidAmerican Energy Company [Member] | Regulated Operation [Member] | Regulated electric | Regulated retail electric [Member] | Industrial [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		274	268	641	608
MidAmerican Energy Company [Member] | Regulated Operation [Member] | Regulated electric | Regulated retail electric [Member] | Other [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	[1]	48	46	118	113
MidAmerican Energy Company [Member] | Regulated Operation [Member] | Regulated electric | Regulated wholesale [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		41	62	168	187
MidAmerican Energy Company [Member] | Regulated Operation [Member] | Regulated electric | Electricity Transmission [Member] | Multi value transmission projects [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		17	14	47	43
MidAmerican Energy Company [Member] | Regulated Operation [Member] | Regulated electric | Non-contracts with customer revenue [Member]
Disaggregation of Revenue [Line Items]
Operating revenue		3	4	16	16
MidAmerican Energy Company [Member] | Regulated Operation [Member] | Regulated natural gas
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		76	103	480	503
Operating revenue		76	103	482	505
MidAmerican Energy Company [Member] | Regulated Operation [Member] | Regulated natural gas | Regulated retail gas [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		61	83	416	428
MidAmerican Energy Company [Member] | Regulated Operation [Member] | Regulated natural gas | Regulated retail gas [Member] | Residential [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		41	54	282	287
MidAmerican Energy Company [Member] | Regulated Operation [Member] | Regulated natural gas | Regulated retail gas [Member] | Commercial [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		10	17	95	100
MidAmerican Energy Company [Member] | Regulated Operation [Member] | Regulated natural gas | Regulated retail gas [Member] | Industrial [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		3	3	12	13
MidAmerican Energy Company [Member] | Regulated Operation [Member] | Regulated natural gas | Regulated retail gas [Member] | Natural gas distribution, transportation-only services [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		7	8	27	27
MidAmerican Energy Company [Member] | Regulated Operation [Member] | Regulated natural gas | Regulated retail gas [Member] | Other [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	[1]	0	1	0	1
MidAmerican Energy Company [Member] | Regulated Operation [Member] | Regulated natural gas | Regulated wholesale [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		15	20	64	75
MidAmerican Energy Company [Member] | Regulated Operation [Member] | Regulated natural gas | Non-contracts with customer revenue [Member]
Disaggregation of Revenue [Line Items]
Operating revenue		0	0	2	2
MidAmerican Energy Company [Member] | Unregulated Operation [Member] | Other customer revenue [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		8	2	23	5
MidAmerican Energy Company [Member] | Unregulated Operation [Member] | Corporate and Other [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		8	2	23	5
Operating revenue		8	2	23	5
MidAmerican Energy Company [Member] | Unregulated Operation [Member] | Corporate and Other [Member] | Other customer revenue [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		8	2	23	$ 5
MidAmerican Energy Company [Member] | Unregulated Operation [Member] | Corporate and Other [Member] | Non-contracts with customer revenue [Member]
Disaggregation of Revenue [Line Items]
Operating revenue		$ 0	$ 0	$ 0
[1]	Other retail includes provisions for rate refunds, for which any actual refunds will be reflected in the applicable customer classes upon resolution of the related regulatory proceeding.

Revenue from Contracts with C_8

Revenue from Contracts with Customers Revenue from Contracts with Customers - LLC - Customer Revenue (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 4,213	$ 4,270	$ 11,329	$ 11,358
Unregulated Operation [Member] | Nonregulated products and services [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 460	426	1,106	1,061
Corporate and Other [Member] | MidAmerican Funding, LLC and Subsidiaries [Domain] | Unregulated Operation [Member] | Nonregulated products and services [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		$ 0	$ 2	$ 2

Revenue from Contracts with C_9

Revenue from Contracts with Customers Revenue from Contracts with Customers - NPC - Customer Revenue (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 4,213	$ 4,270	$ 11,329	$ 11,358
Operating revenue	5,644	5,637	15,148	15,070
Non-contracts with customer revenue [Member]
Disaggregation of Revenue [Line Items]
Operating revenue	124	149	400	460
Regulated Operation [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	3,753	3,844	10,223	10,297
Regulated Operation [Member] | Regulated retail electric [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	2,968	2,971	7,356	7,303
Nevada Power Company [Member]
Disaggregation of Revenue [Line Items]
Operating revenue	806	820	1,728	1,777
Nevada Power Company [Member] | Non-contracts with customer revenue [Member]
Disaggregation of Revenue [Line Items]
Operating revenue	6	6	19	17
Nevada Power Company [Member] | Regulated Operation [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	800	814	1,709	1,760
Nevada Power Company [Member] | Regulated Operation [Member] | Regulated retail electric [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	792	799	1,670	1,722
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	8	15	39	38
Nevada Power Company [Member] | Fully bundled customer [Member] | Regulated Operation [Member] | Regulated retail electric [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	783	790	1,646	1,698
Nevada Power Company [Member] | Fully bundled customer [Member] | Regulated Operation [Member] | Regulated retail electric [Member] | Residential [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	468	484	934	989
Nevada Power Company [Member] | Fully bundled customer [Member] | Regulated Operation [Member] | Regulated retail electric [Member] | Commercial [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	142	135	346	340
Nevada Power Company [Member] | Fully bundled customer [Member] | Regulated Operation [Member] | Regulated retail electric [Member] | Industrial [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	169	164	351	351
Nevada Power Company [Member] | Fully bundled customer [Member] | Regulated Operation [Member] | Regulated retail electric [Member] | Other [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	4	7	15	18
Nevada Power Company [Member] | Distribution only service [Member] | Regulated Operation [Member] | Regulated retail electric [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 9	$ 9	$ 24	$ 24

Revenue from Contracts with _10

Revenue from Contracts with Customers Revenue from Contracts with Customers - SPPC - Customer Revenue (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 4,213	$ 4,270	$ 11,329	$ 11,358
Operating revenue	5,644	5,637	15,148	15,070
Non-contracts with customer revenue [Member]
Disaggregation of Revenue [Line Items]
Operating revenue	124	149	400	460
Regulated Operation [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	3,753	3,844	10,223	10,297
Regulated Operation [Member] | Regulated retail electric [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	2,968	2,971	7,356	7,303
Sierra Pacific Power Company [Member]
Disaggregation of Revenue [Line Items]
Operating revenue	248	239	661	649
Sierra Pacific Power Company [Member] | Non-contracts with customer revenue [Member]
Disaggregation of Revenue [Line Items]
Operating revenue	1	0	4	4
Sierra Pacific Power Company [Member] | Regulated electric
Disaggregation of Revenue [Line Items]
Operating revenue	232	225	586	575
Sierra Pacific Power Company [Member] | Regulated electric | Non-contracts with customer revenue [Member]
Disaggregation of Revenue [Line Items]
Operating revenue	0	0	2	3
Sierra Pacific Power Company [Member] | Regulated natural gas
Disaggregation of Revenue [Line Items]
Operating revenue	16	14	75	74
Sierra Pacific Power Company [Member] | Regulated natural gas | Non-contracts with customer revenue [Member]
Disaggregation of Revenue [Line Items]
Operating revenue	1	0	2	1
Sierra Pacific Power Company [Member] | Regulated Operation [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	247	239	657	645
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	16	13	44	36
Sierra Pacific Power Company [Member] | Regulated Operation [Member] | Regulated electric
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	232	225	584	572
Sierra Pacific Power Company [Member] | Regulated Operation [Member] | Regulated electric | Regulated wholesale, transmission and other [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	16	12	44	35
Sierra Pacific Power Company [Member] | Regulated Operation [Member] | Regulated natural gas
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	15	14	73	73
Sierra Pacific Power Company [Member] | Regulated Operation [Member] | Regulated natural gas | Regulated wholesale, transmission and other [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0	1	0	1
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	230	225	610	606
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	86	85	250	251
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	83	78	206	208
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	59	60	149	142
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	2	2	5	5
Sierra Pacific Power Company [Member] | Regulated Operation [Member] | Fully bundled customer [Member] | Regulated electric | Regulated retail electric [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	215	212	537	534
Sierra Pacific Power Company [Member] | Regulated Operation [Member] | Fully bundled customer [Member] | Regulated electric | Regulated retail electric [Member] | Residential [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	75	76	201	203
Sierra Pacific Power Company [Member] | Regulated Operation [Member] | Fully bundled customer [Member] | Regulated electric | Regulated retail electric [Member] | Commercial [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	80	75	188	190
Sierra Pacific Power Company [Member] | Regulated Operation [Member] | Fully bundled customer [Member] | Regulated electric | Regulated retail electric [Member] | Industrial [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	58	59	143	136
Sierra Pacific Power Company [Member] | Regulated Operation [Member] | Fully bundled customer [Member] | Regulated electric | Regulated retail electric [Member] | Other [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	2	2	5	5
Sierra Pacific Power Company [Member] | Regulated Operation [Member] | Fully bundled customer [Member] | Regulated natural gas
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	15	13	73	72
Sierra Pacific Power Company [Member] | Regulated Operation [Member] | Fully bundled customer [Member] | Regulated natural gas | Residential [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	11	9	49	48
Sierra Pacific Power Company [Member] | Regulated Operation [Member] | Fully bundled customer [Member] | Regulated natural gas | Commercial [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	3	3	18	18
Sierra Pacific Power Company [Member] | Regulated Operation [Member] | Fully bundled customer [Member] | Regulated natural gas | Industrial [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	1	1	6	6
Sierra Pacific Power Company [Member] | Regulated Operation [Member] | Fully bundled customer [Member] | Regulated natural gas | Other [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0	0	0	0
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	1	1	3	3
Sierra Pacific Power Company [Member] | Regulated Operation [Member] | Distribution only service [Member] | Regulated electric | Regulated retail electric [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	1	1	3	3
Sierra Pacific Power Company [Member] | Regulated Operation [Member] | Distribution only service [Member] | Regulated natural gas
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0	0	0	0
Sierra Pacific Power Company [Member] | Regulated Operation [Member] | Fully bundled and distribution services only customer [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	231	226	613	609
Sierra Pacific Power Company [Member] | Regulated Operation [Member] | Fully bundled and distribution services only customer [Member] | Regulated electric | Regulated retail electric [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	216	213	540	537
Sierra Pacific Power Company [Member] | Regulated Operation [Member] | Fully bundled and distribution services only customer [Member] | Regulated natural gas
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 15	$ 13	$ 73	$ 72

Components of Accumulated Oth_3

Components of Accumulated Other Comprehensive Loss, Net (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance - Accumulated other comprehensive loss, net			$ (1,945)
Other comprehensive income (loss), unrecognized amounts on retirement benefits	$ (26)	$ (1)	(40)	$ 50
Other comprehensive income (loss), foreign currency translation adjustment	(172)	(2)	(66)	(236)
Other comprehensive income (loss), unrealized gains (losses) on cash flow hedges	7	1	(28)	2
Other comprehensive income (loss)	(191)	(2)	(134)	(184)
Ending balance - Accumulated other comprehensive loss, net	(2,079)		(2,079)
Accumulated Other Comprehensive (Loss) Income, Net [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification				(1,085)
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance - unrecognized amounts on retirement benefits			(358)	(383)
Beginning balance - foreign currency translation adjustment			(1,623)	(1,129)
Beginning balance - unrealized gains (losses) on available-for-sale securities			0	1,085
Beginning balance - unrealized gains (losses) on cash flow hedges			36	29
Beginning balance - Accumulated other comprehensive loss, net			(1,945)	(398)
Other comprehensive income (loss), unrecognized amounts on retirement benefits			(40)	50
Other comprehensive income (loss), foreign currency translation adjustment			(66)	(236)
Unrealized gains on marketable securities, net of tax			0	0
Other comprehensive income (loss), unrealized gains (losses) on cash flow hedges			(28)	2
Other comprehensive income (loss)	(191)	(2)	(134)	(184)
Ending balance - unrecognized amounts on retirement benefits	(398)	(333)	(398)	(333)
Ending balance - foreign currency translation adjustment	(1,689)	(1,365)	(1,689)	(1,365)
Ending balance - unrealized gains (losses) on available-for-sale securities	0	0	0	0
Ending balance - unrealized gains (losses) on cash flow hedges	8	31	8	31
Ending balance - Accumulated other comprehensive loss, net	$ (2,079)	$ (1,667)	$ (2,079)	$ (1,667)

Components of Accumulated Oth_4

Components of Accumulated Other Comprehensive Loss, Net - MEC (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance - Accumulated other comprehensive loss, net			$ (1,945)
Other comprehensive income (loss), unrealized gains (losses) on cash flow hedges	$ 7	$ 1	(28)	$ 2
Other comprehensive income (loss)	(191)	(2)	(134)	(184)
Ending balance - Accumulated other comprehensive loss, net	(2,079)		(2,079)
Accumulated Other Comprehensive (Loss) Income, Net [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance - unrealized gains (losses) on available-for-sale securities			0	1,085
Beginning balance - unrealized gains (losses) on cash flow hedges			36	29
Beginning balance - Accumulated other comprehensive loss, net			(1,945)	(398)
Other comprehensive income (loss), unrealized gains on available-for-sale securities			0	0
Other comprehensive income (loss), unrealized gains (losses) on cash flow hedges			(28)	2
Other comprehensive income (loss)	(191)	(2)	(134)	(184)
Ending balance - unrealized gains (losses) on available-for-sale securities	0	0	0	0
Ending balance - unrealized gains (losses) on cash flow hedges	8	31	8	31
Ending balance - Accumulated other comprehensive loss, net	$ (2,079)	$ (1,667)	$ (2,079)	$ (1,667)

Segment Information (Details)

Segment Information (Details) - USD ($) $ in Millions	3 Months Ended				9 Months Ended
	Sep. 30, 2019		Sep. 30, 2018		Sep. 30, 2019		Sep. 30, 2018	Dec. 31, 2018
Segment Reporting Information [Line Items]
Operating revenue	$ 5,644		$ 5,637		$ 15,148		$ 15,070
Depreciation and amortization - energy operations	795		667		2,243		2,110
Depreciation and amortization	806		681		2,278		2,147
Operating income	1,450		1,523		3,328		3,366
Interest expense	475		453		1,428		1,380
Capitalized interest	23		17		56		44
Allowance for equity funds	56		30		126		75
Interest and dividend income	25		27		91		85
(Losses) gains on marketable securities, net	(234)		260		(296)		(336)
Other, net	2		19		67		50
Income before income tax expense and equity income	847		1,423		1,944		1,904
Assets	97,913				97,913			$ 92,189
PacifiCorp [Member]
Segment Reporting Information [Line Items]
Operating revenue	1,367		1,369		3,793		3,746
Depreciation and amortization - energy operations	272		203		686		602
Operating income	333		386		885		917
Interest expense	101		96		299		288
Assets	24,789				24,789			23,478
MidAmerican Funding [Member]
Segment Reporting Information [Line Items]
Operating revenue	797		832		2,299		2,297
Depreciation and amortization - energy operations	184		133		540		499
Operating income	234		278		444		444
Interest expense	74		61		223		185
Assets	21,806				21,806			20,029
NV Energy, Inc. [Member]
Segment Reporting Information [Line Items]
Operating revenue	1,054		1,059		2,389		2,426
Depreciation and amortization - energy operations	121		114		361		341
Operating income	313		307		547		540
Interest expense	55		52		173		169
Assets	14,477				14,477			14,119
Northern Powergrid Holdings [Member]
Segment Reporting Information [Line Items]
Operating revenue	230		233		736		757
Depreciation and amortization - energy operations	60		62		186		189
Operating income	98		102		337		360
Interest expense	33		34		102		107
Assets	7,334				7,334			7,427
BHE Pipeline Group [Member]
Segment Reporting Information [Line Items]
Operating revenue	226		259		809		871
Depreciation and amortization - energy operations	28		27		85		99
Operating income	87		105		398		388
Interest expense	14		11		38		31
Assets	5,775				5,775			5,511
BHE Transmission [Member]
Segment Reporting Information [Line Items]
Operating revenue	184		174		527		531
Depreciation and amortization - energy operations	59		61		177		184
Operating income	91		82		244		244
Interest expense	40		42		118		127
Assets	8,692				8,692			8,424
BHE Renewables [Member]
Segment Reporting Information [Line Items]
Operating revenue	329		320		745		720
Depreciation and amortization - energy operations	71		68		210		198
Operating income	183		176		298		308
Interest expense	44		49		132		150
Assets	9,650				9,650			8,666
HomeServices [Member]
Segment Reporting Information [Line Items]
Operating revenue	1,307		1,218		3,419		3,252
Depreciation and amortization	11		14		35		37
Operating income	113		85		209		185
Interest expense	6		6		20		16
Assets	3,971				3,971			2,797
Berkshire Hathaway Energy And Other [Member]
Segment Reporting Information [Line Items]
Operating revenue	150	[1]	173	[1]	431	[1]	470
Depreciation and amortization - energy operations	0		(1)		(2)		(2)
Operating income	(2)		2		(34)		(20)
Interest expense	108		102		323		307
Assets	1,419				1,419			$ 1,738
UNITED STATES
Segment Reporting Information [Line Items]
Operating revenue	5,222		5,209		13,875		13,757
Income before income tax expense and equity income	728		1,290		1,546		1,501
UNITED KINGDOM
Segment Reporting Information [Line Items]
Operating revenue	229		232		734		754
Income before income tax expense and equity income	49		59		228		220
CANADA
Segment Reporting Information [Line Items]
Operating revenue	183		174		526		531
Income before income tax expense and equity income	55		43		134		125
The Philippines and other [Member]
Segment Reporting Information [Line Items]
Operating revenue	10		22		13		28
Income before income tax expense and equity income	$ 15		$ 31		$ 36		$ 58
[1]	(1)The BHE and Other reportable segment represents amounts related principally to other entities, corporate functions and intersegment eliminations.

Segment Information - Goodwill

Segment Information - Goodwill (Details) $ in Millions	9 Months Ended
	Sep. 30, 2019USD ($)
Goodwill [Roll Forward]
Beginning balance	$ 9,595
Acquisitions	30
Foreign currency translation	18
Ending balance	9,643
PacifiCorp [Member]
Goodwill [Roll Forward]
Beginning balance	1,129
Acquisitions	0
Foreign currency translation	0
Ending balance	1,129
MidAmerican Funding [Member]
Goodwill [Roll Forward]
Beginning balance	2,102
Acquisitions	0
Foreign currency translation	0
Ending balance	2,102
NV Energy, Inc. [Member]
Goodwill [Roll Forward]
Beginning balance	2,369
Acquisitions	0
Foreign currency translation	0
Ending balance	2,369
Northern Powergrid Holdings [Member]
Goodwill [Roll Forward]
Beginning balance	952
Acquisitions	0
Foreign currency translation	(26)
Ending balance	926
BHE Pipeline Group [Member]
Goodwill [Roll Forward]
Beginning balance	73
Acquisitions	0
Foreign currency translation	0
Ending balance	73
BHE Transmission [Member]
Goodwill [Roll Forward]
Beginning balance	1,448
Acquisitions	0
Foreign currency translation	44
Ending balance	1,492
BHE Renewables [Member]
Goodwill [Roll Forward]
Beginning balance	95
Acquisitions	0
Foreign currency translation	0
Ending balance	95
HomeServices [Member]
Goodwill [Roll Forward]
Beginning balance	1,427
Acquisitions	30
Foreign currency translation	0
Ending balance	$ 1,457

Segment Information Segment Inf

Segment Information Segment Information - MEC (Details) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019USD ($)	Sep. 30, 2018USD ($)	Sep. 30, 2019USD ($)OperatingSegmentsReportableSegments	Sep. 30, 2018USD ($)	Dec. 31, 2018USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments | OperatingSegments			8
Operating revenue	$ 5,644	$ 5,637	$ 15,148	$ 15,070
Operating income	1,450	1,523	3,328	3,366
Interest expense	(475)	(453)	(1,428)	(1,380)
Capitalized interest	23	17	56	44
Allowance for equity funds	56	30	126	75
Other, net	2	19	67	50
Income before income tax (benefit) expense and equity income	847	1,423	1,944	1,904
Assets	97,913		$ 97,913		$ 92,189
MidAmerican Energy Company [Member]
Segment Reporting Information [Line Items]
Number of reportable segments | ReportableSegments			2
Operating revenue	796	832	$ 2,297	2,295
Operating income	234	278	443	444
Interest expense	(68)	(56)	(207)	(170)
Capitalized interest	7	6	20	14
Allowance for equity funds	27	16	59	39
Other, net	4	13	34	34
Income before income tax (benefit) expense and equity income	204	257	349	361
Assets	19,694		19,694		17,920
MidAmerican Energy Company [Member] | Regulated electric
Segment Reporting Information [Line Items]
Operating revenue	712	727	1,792	1,785
Operating income	243	278	396	392
Assets	18,341		18,341		16,511
MidAmerican Energy Company [Member] | Regulated natural gas
Segment Reporting Information [Line Items]
Operating revenue	76	103	482	505
Operating income	(8)	1	45	52
Assets	1,343		1,343		1,406
MidAmerican Energy Company [Member] | Corporate and Other [Member]
Segment Reporting Information [Line Items]
Operating revenue	8	2	23	5
Operating income	(1)	$ (1)	2	$ 0
Assets	$ 10		$ 10		$ 3

Segment Information Segment I_2

Segment Information Segment Information - MidAmerican Funding (Details) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2019USD ($)	Sep. 30, 2018USD ($)	Sep. 30, 2019USD ($)OperatingSegmentsReportableSegments	Sep. 30, 2018USD ($)	Dec. 31, 2018USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments | OperatingSegments				8
Operating revenue		$ 5,644	$ 5,637	$ 15,148	$ 15,070
Operating income		1,450	1,523	3,328	3,366
Interest expense		(475)	(453)	(1,428)	(1,380)
Capitalized interest		23	17	56	44
Allowance for equity funds		56	30	126	75
Other, net		2	19	67	50
Income before income tax (benefit) expense and equity income		847	1,423	1,944	1,904
Assets		97,913		$ 97,913		$ 92,189
MidAmerican Funding, LLC and Subsidiaries [Domain]
Segment Reporting Information [Line Items]
Number of reportable segments | ReportableSegments				2
Operating revenue		797	832	$ 2,299	2,297
Operating income		234	278	444	444
Interest expense		(74)	(61)	(223)	(185)
Capitalized interest		7	6	20	14
Allowance for equity funds		27	16	59	39
Other, net		5	12	36	35
Income before income tax (benefit) expense and equity income		199	251	336	347
Assets	[1]	20,979		20,979		19,202
MidAmerican Funding, LLC and Subsidiaries [Domain] | Regulated electric
Segment Reporting Information [Line Items]
Operating revenue		712	727	1,792	1,785
Operating income		243	278	396	392
Assets	[1]	19,532		19,532		17,702
MidAmerican Funding, LLC and Subsidiaries [Domain] | Regulated natural gas
Segment Reporting Information [Line Items]
Operating revenue		76	103	482	505
Operating income		(8)	1	45	52
Assets	[1]	1,422		1,422		1,485
MidAmerican Funding, LLC and Subsidiaries [Domain] | Corporate and Other [Member]
Segment Reporting Information [Line Items]
Operating revenue		9	2	25	7
Operating income		(1)	$ (1)	3	$ 0
Assets	[1]	$ 25		$ 25		$ 15
[1]	(1)Consists principally of cash and cash equivalents not included in either the regulated electric or regulated natural gas segments.

Segment Information Segment I_3

Segment Information Segment Information - SPPC (Details) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2019USD ($)	Sep. 30, 2018USD ($)	Sep. 30, 2019USD ($)OperatingSegmentsTheNumberOfReportableSegments	Sep. 30, 2018USD ($)	Dec. 31, 2018USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments | OperatingSegments				8
Operating revenue		$ 5,644	$ 5,637	$ 15,148	$ 15,070
Operating income		1,450	1,523	3,328	3,366
Interest expense		(475)	(453)	(1,428)	(1,380)
Capitalized interest		23	17	56	44
Allowance for equity funds		56	30	126	75
Other, net		2	19	67	50
Income before income tax expense and equity income		847	1,423	1,944	1,904
Assets		97,913		$ 97,913		$ 92,189
Sierra Pacific Power Company [Member]
Segment Reporting Information [Line Items]
Number of reportable segments | TheNumberOfReportableSegments				2
Operating revenue		248	239	$ 661	649
Operating income		67	56	131	122
Interest expense		(12)	(12)	(36)	(33)
Capitalized interest		0	0	1	1
Allowance for equity funds		0	1	2	3
Other, net		1	3	4	8
Income before income tax expense and equity income		56	48	102	101
Assets		3,668		3,668		3,569
Sierra Pacific Power Company [Member] | Regulated electric
Segment Reporting Information [Line Items]
Regulated Operating Revenue		232	225	586	575
Operating revenue		232	225	586	575
Operating income		67	56	119	111
Assets		3,282		3,282		3,177
Sierra Pacific Power Company [Member] | Regulated natural gas
Segment Reporting Information [Line Items]
Regulated Operating Revenue, Gas		16	14	75	74
Operating revenue		16	14	75	74
Operating income		0	$ 0	12	$ 11
Assets		304		304		314
Sierra Pacific Power Company [Member] | Regulated common assets [Member]
Segment Reporting Information [Line Items]
Assets	[1]	$ 82		$ 82		$ 78
[1]	(1)Consists principally of cash and cash equivalents not included in either the regulated electric or regulated natural gas segments.

Related Party Transactions Re_2

Related Party Transactions Related Party Transactions PacifiCorp (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
PacifiCorp [Member] | BHE [Member]
Related Party Transaction [Line Items]
Related party transaction, cash paid for income taxes, net	$ 128	$ 21

BHE Shareholders' Equity (Detai

BHE Shareholders' Equity (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Class of Stock [Line Items]
Stock Repurchased During Period, Value	$ 17	$ 293	$ 107
Common Stock [Member]
Class of Stock [Line Items]
Stock Repurchased and Retired During Period, Shares		447,712	177,381
Stock Repurchased During Period, Value		$ 293	$ 107