Document

Investments and restricted cash and cash equivalents and investments

69,939

68,087

Goodwill

9,675

9,595

Regulatory assets

2,849

2,896

5,092

4,903

Other assets

2,083

1,561

Total assets

96,142

92,189

Current liabilities:

Accounts payable

1,666

1,809

Accrued interest

533

469

Accrued property, income and other taxes

419

599

Short-term debt

2,594

2,516

Current portion of long-term debt

1,906

2,081

Other current liabilities

1,444

1,021

Total current liabilities

8,907

8,770

Deferred income taxes

9,093

9,047

Regulatory liabilities

7,382

7,346

Other long-term liabilities

3,783

3,134

Total liabilities

65,355

62,466

Commitments and contingencies

Equity:

Additional paid-in capital

6,355

6,371

Retained earnings

26,651

25,624

Accumulated other comprehensive loss, net

(1,888)

(1,945)

Total member's equity

30,661

29,593

Total liabilities and equity

96,142

92,189

Cash and cash equivalents

Current assets:

186

Trade receivables, net

352

365

Income tax receivable

110

Inventories

184

204

Other current assets

Total current assets

923

659

Investments and restricted cash and cash equivalents and investments

16,963

16,169

Goodwill

1,270

Regulatory assets

282

273

775

710

Other assets

100

121

Total assets

^[1]

20,313

19,202

Current liabilities:

Accounts payable

406

575

Accrued interest

Accrued property, income and other taxes

147

300

Notes Payable, Related Parties, Current

166

156

Short-term debt

240

Current portion of long-term debt

500

Other current liabilities

146

122

Total current liabilities

943

1,951

Long-term debt

6,581

5,119

Deferred income taxes

2,423

2,319

Regulatory liabilities

1,612

1,620

Asset retirement obligations

776

552

Other long-term liabilities

306

312

Total liabilities

12,641

11,873

Commitments and contingencies

Equity:

Additional paid-in capital

1,679

Retained earnings

5,993

5,650

Total member's equity

7,672

7,329

Total liabilities and equity

$ 20,313

$ 19,202

[1]	(1)Consists principally of cash and cash equivalents not included in either the regulated electric or regulated natural gas segments.

XML 52 R8.htm IDEA: XBRL DOCUMENT

Consolidated Balance Sheets - NPC - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 1,265	$ 627
Inventories	867	844
Other current assets	763	798
Total current assets	6,504	5,147
Finance Lease, Right-of-Use Asset	509
Regulatory assets	2,849	2,896
Other assets	2,083	1,561
Total assets	96,142	92,189
Current liabilities:
Accounts payable	1,666	1,809
Accrued interest	533	469
Accrued property, income and other taxes	419	599
Current portion of long-term debt	1,906	2,081
Other current liabilities	1,444	1,021
Total current liabilities	8,907	8,770
Regulatory liabilities	7,382	7,346
Deferred income taxes	9,093	9,047
Other long-term liabilities	3,783	3,134
Total liabilities	65,355	62,466
Commitments and contingencies
Equity:
Common stock	0	0
Additional paid-in capital	6,355	6,371
Retained earnings	26,651	25,624
Accumulated other comprehensive loss, net	(1,888)	(1,945)
Total BHE shareholders' equity	30,661	29,593
Total liabilities and equity	96,142	92,189
Nevada Power Company [Member]
Current assets:
Cash and cash equivalents	81	111
Trade receivables, net	280	233
Inventories	65	61
Regulatory assets	47	39
Other current assets	59	75
Total current assets	532	519
Property, plant and equipment, net	6,457	6,418
Finance Lease, Right-of-Use Asset	449	450
Regulatory assets	845	878
Other assets	59	37
Total assets	8,342	8,302
Current liabilities:
Accounts payable	191	187
Accrued interest	30	38
Accrued property, income and other taxes	54	30
Current portion of long-term debt	575	500
Finance Lease, Liability, Current	27	20
Regulatory liabilities	47	49
Customer deposits	85	67
Other current liabilities	43	29
Total current liabilities	1,052	920
Long-term debt	1,775	1,853
Finance Lease, Liability, Noncurrent	434	443
Regulatory liabilities	1,153	1,137
Deferred income taxes	738	749
Other long-term liabilities	306	296
Total liabilities	5,458	5,398
Commitments and contingencies
Equity:
Common stock	0	0
Additional paid-in capital	2,308	2,308
Retained earnings	580	600
Accumulated other comprehensive loss, net	(4)	(4)
Total BHE shareholders' equity	2,884	2,904
Total liabilities and equity	$ 8,342	$ 8,302

XML 53 R9.htm IDEA: XBRL DOCUMENT

Consolidated Balance Sheets (Parenthetical) - NPC - $ / shares	Jun. 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	$ 1.00	$ 1.00
Common stock, shares authorized	1,000	1,000
Common stock, shares issued	1,000	1,000
Common stock, shares outstanding	1,000	1,000

XML 54 R10.htm IDEA: XBRL DOCUMENT

Consolidated Balance Sheets - SPPC - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 1,265	$ 627
Inventories	867	844
Other current assets	763	798
Total current assets	6,504	5,147
Regulatory assets	2,849	2,896
Other assets	2,083	1,561
Total assets	96,142	92,189
Current liabilities:
Accounts payable	1,666	1,809
Accrued interest	533	469
Accrued property, income and other taxes	419	599
Other current liabilities	1,444	1,021
Total current liabilities	8,907	8,770
Long-term debt, carrying value	38,096	36,250
Regulatory liabilities	7,382	7,346
Deferred income taxes	9,093	9,047
Other long-term liabilities	3,783	3,134
Total liabilities	65,355	62,466
Commitments and contingencies
Equity:
Common stock	0	0
Additional paid-in capital	6,355	6,371
Retained earnings	26,651	25,624
Total BHE shareholders' equity	30,661	29,593
Total liabilities and equity	96,142	92,189
Sierra Pacific Power Company [Member]
Current assets:
Cash and cash equivalents	28	71
Trade receivables, net	90	100
Inventories	60	52
Regulatory assets	21	7
Other current assets	26	33
Total current assets	225	263
Property, plant and equipment, net	2,992	2,947
Regulatory assets	309	314
Other assets	68	45
Total assets	3,594	3,569
Current liabilities:
Accounts payable	86	116
Accrued interest	14	13
Accrued property, income and other taxes	21	14
Regulatory liabilities	27	18
Customer deposits	21	18
Other current liabilities	29	18
Total current liabilities	198	197
Long-term debt, carrying value	1,135	1,120
Regulatory liabilities	485	491
Deferred income taxes	341	331
Other long-term liabilities	181	166
Total liabilities	2,340	2,305
Commitments and contingencies
Equity:
Common stock	0	0
Additional paid-in capital	1,111	1,111
Retained earnings	143	153
Total BHE shareholders' equity	1,254	1,264
Total liabilities and equity	$ 3,594	$ 3,569

XML 55 R11.htm IDEA: XBRL DOCUMENT

Consolidated Balance Sheets (Parenthetical) - SPPC - $ / shares	Jun. 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

XML 56 R12.htm IDEA: XBRL DOCUMENT

Consolidated Balance Sheets (Parenthetical) - $ / shares shares in Millions	Jun. 30, 2019	Dec. 31, 2018
BHE shareholders' equity:
Common stock, par value	$ 0.00	$ 0.00
Common stock, shares authorized	115	115
Common stock, shares issued	77	77
Common stock, shares outstanding	77	77

XML 57 R13.htm IDEA: XBRL DOCUMENT

Consolidated Statements of Operations - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Operating revenue:
Total operating revenue	$ 4,894	$ 4,993	$ 9,504	$ 9,433
Cost of sales	1,027	1,126	2,241	2,294
Energy:
Operations and maintenance	822	849	1,624	1,633
Depreciation and amortization	728	739	1,448	1,443
Property and other taxes	148	142	297	286
Real estate	1,210	1,165	2,016	1,934
Total operating expenses	3,935	4,021	7,626	7,590
Operating income	959	972	1,878	1,843
Other income (expense):
Interest expense	(476)	(461)	(953)	(927)
Capitalized interest	17	15	33	27
Allowance for equity funds	38	24	70	45
Interest and dividend income	36	32	66	58
Gains (losses) on marketable securities, net	6	(387)	(62)	(596)
Other, net	30	1	65	31
Total other income (expense)	(349)	(776)	(781)	(1,362)
Income before income tax benefit and equity income (loss)	610	196	1,097	481
Income tax benefit	(76)	(168)	(224)	(389)
Equity income (loss)	2	14	(8)	26
Net income	688	378	1,313	896
Net income attributable to noncontrolling interests	4	6	7	11
Net income attributable to BHE shareholders	684	372	1,306	885
Electricity and natural gas [Member]
Operating revenue:
Total operating revenue	3,567	3,720	7,392	7,399
Residential real estate brokerage and mortgage businesses [Member]
Operating revenue:
Total operating revenue	$ 1,327	$ 1,273	$ 2,112	$ 2,034

XML 58 R14.htm IDEA: XBRL DOCUMENT

Consolidated Statements of Operations - PacifiCorp - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Operating revenue	$ 4,894	$ 4,993	$ 9,504	$ 9,433
Cost of sales	1,027	1,126	2,241	2,294
Operating expenses:
Operating income	959	972	1,878	1,843
Other income (expense):
Interest expense	(476)	(461)	(953)	(927)
Allowance for borrowed funds	17	15	33	27
Allowance for equity funds	38	24	70	45
Interest and dividend income	36	32	66	58
Other, net	30	1	65	31
Total other income (expense)	(349)	(776)	(781)	(1,362)
Income before income tax expense and equity income	610	196	1,097	481
Income tax benefit	(76)	(168)	(224)	(389)
Net income attributable to BHE shareholders	684	372	1,306	885
PacifiCorp [Member]
Operating revenue	1,167	1,193	2,426	2,377
Cost of sales	384	402	849	835
Operating expenses:
Operations and maintenance	255	261	511	511
Depreciation and amortization	209	197	414	399
Property and other taxes	51	49	100	101
Utilities Operating Expense	899	909	1,874	1,846
Operating income	268	284	552	531
Other income (expense):
Interest expense	(102)	(96)	(198)	(192)
Allowance for borrowed funds	8	4	15	8
Allowance for equity funds	16	8	30	15
Interest and dividend income	7	3	12	6
Other, net	9	8	16	16
Total other income (expense)	(62)	(73)	(125)	(147)
Income before income tax expense and equity income	206	211	427	384
Income tax benefit	38	27	80	52
Net income attributable to BHE shareholders	$ 168	$ 184	$ 347	$ 332

XML 59 R15.htm IDEA: XBRL DOCUMENT

Statements of Operations - MEC - USD ($) $ in Millions	3 Months Ended		6 Months Ended
Statements of Operations - MEC - USD ($) $ in Millions	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Operating revenue:
Total operating revenue	$ 4,894	$ 4,993	$ 9,504	$ 9,433
Cost of sales	1,027	1,126	2,241	2,294
Operating expenses:
Total operating expenses	3,935	4,021	7,626	7,590
Operating income	959	972	1,878	1,843
Other income (expense):
Interest expense	(476)	(461)	(953)	(927)
Allowance for borrowed funds	17	15	33	27
Allowance for equity funds	38	24	70	45
Other, net	30	1	65	31
Total other income (expense)	(349)	(776)	(781)	(1,362)
Income before income tax (benefit) expense and equity income	610	196	1,097	481
Income tax benefit	(76)	(168)	(224)	(389)
Net Income (Loss) Attributable to Parent	684	372	1,306	885
MidAmerican Energy Company [Member]
Operating revenue:
Total operating revenue	659	717	1,501	1,463
Operating expenses:
Operations and maintenance	204	207	411	397
Depreciation and amortization	179	208	356	366
Property and other taxes	29	30	63	62
Total operating expenses	565	630	1,292	1,297
Operating income	94	87	209	166
Other income (expense):
Interest expense	(70)	(56)	(139)	(114)
Allowance for borrowed funds	7	4	13	8
Allowance for equity funds	17	13	32	23
Other, net	10	12	30	21
Total other income (expense)	(36)	(27)	(64)	(62)
Income before income tax (benefit) expense and equity income	58	60	145	104
Income tax benefit	(98)	(46)	(204)	(108)
Net Income (Loss) Attributable to Parent	156	106	349	212
Regulated electric \| MidAmerican Energy Company [Member]
Operating revenue:
Total operating revenue	538	589	1,080	1,058
Cost of sales	91	118	205	226
Regulated natural gas and other \| MidAmerican Energy Company [Member]
Operating revenue:
Total operating revenue	121	128	421	405
Cost of sales	$ 62	$ 67	$ 257	$ 246

XML 60 R16.htm IDEA: XBRL DOCUMENT

Consolidated Statements of Operations - MidAmerican Funding - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Operating revenue:
Total operating revenue	$ 4,894	$ 4,993	$ 9,504	$ 9,433
Cost of sales	1,027	1,126	2,241	2,294
Operating expenses:
Total operating expenses	3,935	4,021	7,626	7,590
Operating income	959	972	1,878	1,843
Other income (expense):
Other Interest and Dividend Income	(476)	(461)	(953)	(927)
Allowance for borrowed funds	17	15	33	27
Allowance for equity funds	38	24	70	45
Other, net	30	1	65	31
Total other income (expense)	(349)	(776)	(781)	(1,362)
Income before income tax (benefit) expense and equity income	610	196	1,097	481
Income tax benefit	(76)	(168)	(224)	(389)
Net Income (Loss) Attributable to Parent	684	372	1,306	885
MidAmerican Funding, LLC and Subsidiaries [Domain]
Operating revenue:
Total operating revenue	660	718	1,502	1,465
Operating expenses:
Operations and maintenance	205	208	412	398
Depreciation and amortization	179	208	356	366
Property and other taxes	29	30	63	62
Total operating expenses	566	631	1,292	1,299
Operating income	94	87	210	166
Other income (expense):
Other Interest and Dividend Income	(74)	(61)	(149)	(124)
Allowance for borrowed funds	7	4	13	8
Allowance for equity funds	17	13	32	23
Other, net	10	13	31	23
Total other income (expense)	(40)	(31)	(73)	(70)
Income before income tax (benefit) expense and equity income	54	56	137	96
Income tax benefit	(99)	(47)	(206)	(110)
Net Income (Loss) Attributable to Parent	153	103	343	206
Regulated electric \| MidAmerican Funding, LLC and Subsidiaries [Domain]
Operating revenue:
Total operating revenue	538	589	1,080	1,058
Cost of sales	91	118	205	226
Regulated natural gas and other \| MidAmerican Funding, LLC and Subsidiaries [Domain]
Operating revenue:
Total operating revenue	122	129	422	407
Cost of sales	$ 62	$ 67	$ 256	$ 247

XML 61 R17.htm IDEA: XBRL DOCUMENT

Consolidated Statements of Operations - NPC - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Operating revenue	$ 4,894	$ 4,993	$ 9,504	$ 9,433
Cost of sales	1,027	1,126	2,241	2,294
Total operating expenses	3,935	4,021	7,626	7,590
Operating income	959	972	1,878	1,843
Interest expense	(476)	(461)	(953)	(927)
Allowance for equity funds	38	24	70	45
Other, net	30	1	65	31
Total other income (expense)	(349)	(776)	(781)	(1,362)
Income before income tax expense and equity income	610	196	1,097	481
Income tax benefit	(76)	(168)	(224)	(389)
Net income attributable to BHE shareholders	684	372	1,306	885
Nevada Power Company [Member]
Operating revenue	527	562	922	957
Cost of sales	226	239	399	409
Operations and maintenance	78	107	154	198
Depreciation and amortization	89	84	178	168
Property and other taxes	11	10	23	20
Total operating expenses	404	440	754	795
Operating income	123	122	168	162
Interest expense	(41)	(45)	(88)	(90)
Allowance for Funds Used During Construction, Capitalized Interest	0	1	1	1
Allowance for equity funds	1	0	2	1
Other, net	5	5	13	9
Total other income (expense)	(35)	(39)	(72)	(79)
Income before income tax expense and equity income	88	83	96	83
Income tax benefit	19	19	21	19
Net income attributable to BHE shareholders	$ 69	$ 64	$ 75	$ 64

XML 62 R18.htm IDEA: XBRL DOCUMENT

Consolidated Statements of Operations - SPPC - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Total operating revenue	$ 4,894	$ 4,993	$ 9,504	$ 9,433
Cost of sales	1,027	1,126	2,241	2,294
Total operating expenses	3,935	4,021	7,626	7,590
Operating income	959	972	1,878	1,843
Interest expense	(476)	(461)	(953)	(927)
Allowance for equity funds	38	24	70	45
Other, net	30	1	65	31
Total other income (expense)	(349)	(776)	(781)	(1,362)
Income before income tax expense and equity income	610	196	1,097	481
Income tax benefit	(76)	(168)	(224)	(389)
Net income attributable to BHE shareholders	684	372	1,306	885
Sierra Pacific Power Company [Member]
Total operating revenue	194	188	413	410
Operations and maintenance	40	48	84	87
Depreciation and amortization	32	29	63	59
Property and other taxes	6	6	12	12
Total operating expenses	167	169	349	344
Operating income	27	19	64	66
Interest expense	(12)	(11)	(24)	(21)
Allowance for Funds Used During Construction, Capitalized Interest	1	1	1	1
Allowance for equity funds	1	1	2	2
Other, net	1	3	3	5
Total other income (expense)	(9)	(6)	(18)	(13)
Income before income tax expense and equity income	18	13	46	53
Income tax benefit	4	6	10	12
Net income attributable to BHE shareholders	14	7	36	41
Regulated electric \| Sierra Pacific Power Company [Member]
Total operating revenue	172	169	354	350
Cost of sales	79	78	161	155
Regulated natural gas \| Sierra Pacific Power Company [Member]
Total operating revenue	22	19	59	60
Cost of sales	$ 10	$ 8	$ 29	$ 31

XML 63 R19.htm IDEA: XBRL DOCUMENT

Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Statement of Comprehensive Income [Abstract]
Net income	$ 688	$ 378	$ 1,313	$ 896
Other comprehensive (loss) income, net of tax:
Unrecognized amounts on retirement benefits, net of tax	(18)	(54)	14	(51)
Foreign currency translation adjustment	(49)	(307)	106	(234)
Unrealized losses on cash flow hedges, net of tax	(27)	3	(35)	1
Total other comprehensive (loss) income, net of tax	(58)	(250)	57	(182)
Comprehensive income	630	128	1,370	714
Comprehensive income attributable to noncontrolling interests	4	6	7	11
Comprehensive income attributable to BHE shareholders	$ 626	$ 122	$ 1,363	$ 703

XML 64 R20.htm IDEA: XBRL DOCUMENT

Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Consolidated Statements of Comprehensive Income Parenthetical [Abstract]
Unrecognized amounts on retirement benefits, tax	$ 5	$ 16	$ (2)	$ 12
Unrealized (losses) gains on marketable securities, tax	0	0	0	0
Unrealized (losses) gains on cash flow hedges, tax	$ (9)	$ 1	$ (11)	$ 0

XML 65 R21.htm IDEA: XBRL DOCUMENT

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	893	0	0		885	0	8
Other comprehensive income (loss)	(182)	0	0		0	(182)	0
Reclassification of long-term income tax receivable	(609)			(609)
Long-term income tax receivable adjustments	0			115	(115)
Common stock purchases	(90)	0	(5)		(85)	0	0
Distributions	(12)	0	0		0	0	(12)
Other equity transactions	(4)	$ 0	(5)		0	0	1
Balance (shares) at Jun. 30, 2018		77
Balance at Jun. 30, 2018	28,304	$ 0	6,358	(494)	23,976	(1,665)	129
Balance (shares) at Mar. 31, 2018		77
Balance at Mar. 31, 2018	28,794	$ 0	6,363	0	23,719	(1,415)	127
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	376	0	0		372	0	4
Other comprehensive income (loss)	(250)	0	0		0	(250)	0
Reclassification of long-term income tax receivable	(609)			(609)
Long-term income tax receivable adjustments	0			115	(115)
Distributions	(3)	0	0		0	0	(3)
Other equity transactions	(4)	$ 0	(5)		0	0	1
Balance (shares) at Jun. 30, 2018		77
Balance at Jun. 30, 2018	$ 28,304	$ 0	6,358	(494)	23,976	(1,665)	129
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	1,313	0	0		1,306	0	7
Other comprehensive income (loss)	57	0	0		0	57	0
Common stock purchases	(293)	0	(16)		(277)	0	0
Distributions	(10)	0	0		0	0	(10)
Other equity transactions	$ (3)	$ 0	0		(2)	0	(1)
Balance (shares) at Jun. 30, 2019	77	77
Balance at Jun. 30, 2019	$ 30,787	$ 0	6,355	(457)	26,651	(1,888)	126
Balance (shares) at Mar. 31, 2019		77
Balance at Mar. 31, 2019	30,162	$ 0	6,355	(457)	25,968	(1,830)	126
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	688	0	0		684	0	4
Other comprehensive income (loss)	(58)	0	0		0	(58)	0
Distributions	(3)	0	0		0	0	(3)
Other equity transactions	$ (2)	$ 0	0		(1)	0	(1)
Balance (shares) at Jun. 30, 2019	77	77
Balance at Jun. 30, 2019	$ 30,787	$ 0	$ 6,355	$ (457)	$ 26,651	$ (1,888)	$ 126

XML 66 R22.htm IDEA: XBRL DOCUMENT

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	$ 885					332				332
Total other comprehensive (loss) income, net of tax	(182)	$ 0	$ 0	$ 0	$ (182)
Dividends, Common Stock, Cash						(350)				(350)
Stockholders' Equity Attributable to Parent at Jun. 30, 2018						7,537	2	0	4,479	3,071	(15)
Stockholders' Equity Attributable to Parent at Mar. 31, 2018						7,453	2	0	4,479	2,987	(15)
Net Income (Loss) Attributable to Parent	372					184				184
Total other comprehensive (loss) income, net of tax	(250)	0	0	0	(250)
Dividends, Common Stock, Cash						(100)				(100)
Stockholders' Equity Attributable to Parent at Jun. 30, 2018						7,537	2	0	4,479	3,071	(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	1,306					347
Total other comprehensive (loss) income, net of tax	57	0	0	0	57	0				(1)	1
Dividends, Common Stock, Cash						(175)				(175)
Stockholders' Equity Attributable to Parent at Jun. 30, 2019	30,661					8,017	2	0	4,479	3,548	(12)
Stockholders' Equity Attributable to Parent at Mar. 31, 2019						7,850	2	0	4,479	3,381	(12)
Net Income (Loss) Attributable to Parent	684					168				168
Total other comprehensive (loss) income, net of tax	(58)	$ 0	$ 0	$ 0	$ (58)	(1)				(1)
Dividends, Common Stock, Cash						0				0
Stockholders' Equity Attributable to Parent at Jun. 30, 2019	$ 30,661					$ 8,017	$ 2	$ 0	$ 4,479	$ 3,548	$ (12)

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

XML 67 R23.htm IDEA: XBRL DOCUMENT

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	$ 885					212			212
Other comprehensive income (loss)	(182)	$ 0	$ 0	$ 0	$ (182)
Stockholders' Equity, Other	(4)	0	(5)	0	0	1			1
Stockholders' Equity Attributable to Parent at Jun. 30, 2018						5,977	0	561	5,416
Stockholders' Equity Attributable to Parent at Mar. 31, 2018						5,870	0	561	5,309
Net Income (Loss) Attributable to Parent	372					106			106
Other comprehensive income (loss)	(250)	0	0	0	(250)
Stockholders' Equity, Other	(4)	0	(5)	0	0	1			1
Stockholders' Equity Attributable to Parent at Jun. 30, 2018						5,977	0	561	5,416
Stockholders' Equity Attributable to Parent at Dec. 31, 2018	29,593					6,446	0	561	5,885
Net Income (Loss) Attributable to Parent	1,306					349			349
Other comprehensive income (loss)	57	0	0	0	57
Stockholders' Equity, Other	(3)	0	0	(2)	0
Stockholders' Equity Attributable to Parent at Jun. 30, 2019	30,661					6,795	0	561	6,234
Stockholders' Equity Attributable to Parent at Mar. 31, 2019						6,639	0	561	6,078
Net Income (Loss) Attributable to Parent	684					156			156
Other comprehensive income (loss)	(58)	0	0	0	(58)
Stockholders' Equity, Other	(2)	$ 0	$ 0	$ (1)	$ 0
Stockholders' Equity Attributable to Parent at Jun. 30, 2019	$ 30,661					$ 6,795	$ 0	$ 561	$ 6,234

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

XML 68 R24.htm IDEA: XBRL DOCUMENT

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	$ 885				206		206
Other comprehensive income (loss)	(182)	$ 0	$ 0	$ (182)
Stockholders' Equity Attributable to Parent at Jun. 30, 2018					6,866	1,679	5,187
Stockholders' Equity, Other	(4)	(5)	0	0
Stockholders' Equity Attributable to Parent at Mar. 31, 2018					6,763	1,679	5,084
Net Income (Loss) Attributable to Parent	372				103		103
Other comprehensive income (loss)	(250)	0	0	(250)
Stockholders' Equity Attributable to Parent at Jun. 30, 2018					6,866	1,679	5,187
Stockholders' Equity, Other	(4)	(5)	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	1,306				343		343
Other comprehensive income (loss)	57	0	0	57
Stockholders' Equity Attributable to Parent at Jun. 30, 2019	30,661				7,672	1,679	5,993
Stockholders' Equity, Other	(3)	0	(2)	0
Stockholders' Equity Attributable to Parent at Mar. 31, 2019					7,519	1,679	5,840
Net Income (Loss) Attributable to Parent	684				153		153
Other comprehensive income (loss)	(58)	0	0	(58)
Stockholders' Equity Attributable to Parent at Jun. 30, 2019	30,661				$ 7,672	$ 1,679	$ 5,993
Stockholders' Equity, Other	$ (2)	$ 0	$ (1)	$ 0

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

XML 69 R25.htm IDEA: XBRL DOCUMENT

Consolidated Statements of Changes in Equity - NPC - USD ($) $ in Millions	Total	Common Stock [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	$ 885		64			64
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)
Balance (shares) at Mar. 31, 2018		77,000,000		1,000
Stockholders' Equity Attributable to Parent at Mar. 31, 2018			2,678	$ 0	2,308	374	(4)
Net Income (Loss) Attributable to Parent	$ 372		64			64
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)
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	$ 1,306		75			75
Dividends, Common Stock, Cash			$ (95)			(95)
Balance (shares) at Jun. 30, 2019	77,000,000	77,000,000	1,000	1,000
Stockholders' Equity Attributable to Parent at Jun. 30, 2019	$ 30,661		$ 2,884	$ 0	2,308	580	(4)
Balance (shares) at Mar. 31, 2019		77,000,000		1,000
Stockholders' Equity Attributable to Parent at Mar. 31, 2019			2,835	$ 0	2,308	531	(4)
Net Income (Loss) Attributable to Parent	$ 684		69			69
Dividends, Common Stock, Cash			$ (20)			(20)
Balance (shares) at Jun. 30, 2019	77,000,000	77,000,000	1,000	1,000
Stockholders' Equity Attributable to Parent at Jun. 30, 2019	$ 30,661		$ 2,884	$ 0	$ 2,308	$ 580	$ (4)

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

XML 70 R26.htm IDEA: XBRL DOCUMENT

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	$ 885					41			41
Stockholders' Equity, Other	(4)	$ 0	$ (5)	$ 0	$ 0	1	$ 0	0	(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)
Balance (shares) at Mar. 31, 2018		77,000,000					1,000
Stockholders' Equity Attributable to Parent at Mar. 31, 2018						1,206	$ 0	1,111	96	(1)
Net Income (Loss) Attributable to Parent	372					7			7
Stockholders' Equity, Other	$ (4)	$ 0	(5)	0	0	1	$ 0	0	(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)
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	1,306					36			36
Dividends, Common Stock, Cash						$ (46)			(46)
Stockholders' Equity, Other	$ (3)	$ 0	0	(2)	0
Balance (shares) at Jun. 30, 2019	77,000,000	77,000,000				1,000	1,000
Stockholders' Equity Attributable to Parent at Jun. 30, 2019	$ 30,661					$ 1,254	$ 0	1,111	143	0
Balance (shares) at Mar. 31, 2019		77,000,000					1,000
Stockholders' Equity Attributable to Parent at Mar. 31, 2019						1,286	$ 0	1,111	175	0
Net Income (Loss) Attributable to Parent	684					14			14
Dividends, Common Stock, Cash						$ (46)			(46)
Stockholders' Equity, Other	$ (2)	$ 0	$ 0	$ (1)	$ 0
Balance (shares) at Jun. 30, 2019	77,000,000	77,000,000				1,000	1,000
Stockholders' Equity Attributable to Parent at Jun. 30, 2019	$ 30,661					$ 1,254	$ 0	$ 1,111	$ 143	$ 0

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

Restricted Cash and Cash Equivalents Items [Line Items]

XML 71 R27.htm IDEA: XBRL DOCUMENT

Consolidated Statements of Cash Flows - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Cash flows from operating activities:
Net income	$ 1,313	$ 896
Adjustments to reconcile net income to net cash flows from operating activities:
Gains (losses) on marketable securities, net	(62)	(596)
Depreciation and amortization	1,472	1,466
Allowance for equity funds	(70)	(45)
Equity (income) loss, net of distributions	37	1
Changes in regulatory assets and liabilities	1	206
Deferred income taxes and amortization of investment tax credits	25	(264)
Other, net	23	26
Changes in other operating assets and liabilities, net of effects from acquisitions:
Trade receivables and other assets	(550)	(226)
Derivative collateral, net	(30)	(5)
Pension and other postretirement benefit plans	(41)	(23)
Accrued property, income and other taxes, net	(140)	174
Accounts payable and other liabilities	32	16
Net cash flows from operating activities	2,134	2,818
Cash flows from investing activities:
Capital expenditures	(2,750)	(2,779)
Acquisitions, net of cash acquired	(29)	(107)
Purchases of marketable securities	190	209
Proceeds from sales of marketable securities	185	184
Equity method investments	(211)	(151)
Other, net	36	43
Net cash flows from investing activities	(2,959)	(3,019)
Cash flows from financing activities:
Proceeds from BHE senior debt	0	2,176
Repayments of Unsecured Debt	0	(650)
Common stock purchases	(293)	(90)
Proceeds from subsidiary debt	3,464	1,313
Repayments of subsidiary debt	(1,763)	(1,082)
Net proceeds from (repayments of) short-term debt	64	(1,048)
Business acquisition, acquisition of remaining noncontrolling interest	0	131
Other, net	(25)	(23)
Net cash flows from financing activities	1,447	465
Effect of exchange rate changes	1	(3)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect	623	261
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	$ 1,506	$ 1,544

XML 72 R28.htm IDEA: XBRL DOCUMENT

Consolidated Statements of Cash Flows - PacifiCorp - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Net Income (Loss) Attributable to Parent	$ 1,306	$ 885
Increase (Decrease) in Allowance for Equity Funds Used During Construction	(70)	(45)
Changes in regulatory assets and liabilities	1	206
Deferred income taxes and amortization of investment tax credits	25	(264)
Other Noncash Income (Expense)	23	26
Trade receivables and other assets	(550)	(226)
Derivative collateral, net	(30)	(5)
Accrued property, income and other taxes, net	(140)	174
Accounts payable and other liabilities	32	16
Net cash flows from operating activities	2,134	2,818
Capital expenditures	(2,750)	(2,779)
Other, net	36	43
Net cash flows from investing activities	(2,959)	(3,019)
Net proceeds from (repayments of) short-term debt	(64)	1,048
Other, net	(25)	(23)
Net cash flows from financing activities	1,447	465
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect	623	261
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	1,506	1,544
PacifiCorp [Member]
Net Income (Loss) Attributable to Parent	347	332
Depreciation and amortization	414	399
Increase (Decrease) in Allowance for Equity Funds Used During Construction	(30)	(15)
Changes in regulatory assets and liabilities	(22)	116
Deferred income taxes and amortization of investment tax credits	(8)	(52)
Other Noncash Income (Expense)	(5)	1
Trade receivables and other assets	64	33
Increase (Decrease) in Inventories	(23)	(16)
Derivative collateral, net	4	(3)
Accrued property, income and other taxes, net	115	111
Accounts payable and other liabilities	(14)	11
Net cash flows from operating activities	842	917
Capital expenditures	(817)	(499)
Other, net	4	0
Net cash flows from investing activities	(813)	(499)
Proceeds from Issuance of Long-term Debt	990	0
Repayments of BHE senior debt and junior subordinated debentures	(350)	(86)
Net proceeds from (repayments of) short-term debt	(30)	28
Payments of Ordinary Dividends, Common Stock	(175)	(350)
Other, net	(2)	(2)
Net cash flows from financing activities	433	(410)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect	462	8
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	$ 554	$ 37

XML 73 R29.htm IDEA: XBRL DOCUMENT

Statements of Cash Flows - MEC - USD ($) $ in Millions	6 Months Ended
Statements of Cash Flows - MEC - USD ($) $ in Millions	Jun. 30, 2019	Jun. 30, 2018
Net Income (Loss) Attributable to Parent	$ 1,306	$ 885
Allowance for equity funds	(70)	(45)
Deferred income taxes and amortization of investment tax credits	25	(264)
Other Noncash Income (Expense)	23	26
Increase (Decrease) in Accounts Receivable and Other Operating Assets	550	226
Derivative collateral, net	(30)	(5)
Pension and other postretirement benefit plans	(41)	(23)
Accrued property, income and other taxes, net	(140)	174
Accounts payable and other liabilities	32	16
Net cash flows from operating activities	2,134	2,818
Capital expenditures	(2,750)	(2,779)
Purchases of marketable securities	190	209
Proceeds from sales of marketable securities	185	184
Other, net	36	43
Net cash flows from investing activities	(2,959)	(3,019)
Net proceeds from (repayments of) short-term debt	64	(1,048)
Other, net	(25)	(23)
Net cash flows from financing activities	1,447	465
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect	623	261
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	1,506	1,544
MidAmerican Energy Company [Member]
Net Income (Loss) Attributable to Parent	349	212
Depreciation and amortization	356	366
Amortization of Utility Plant to Other Operating Expense	17	17
Allowance for equity funds	(32)	(23)
Deferred income taxes and amortization of investment tax credits	52	(10)
Other Noncash Income (Expense)	5	7
Increase (Decrease) in Accounts Receivable and Other Operating Assets	2	(1)
Increase (Decrease) in Inventories	20	45
Derivative collateral, net	1	0
Pension and other postretirement benefit plans	(6)	(7)
Accrued property, income and other taxes, net	(263)	140
Accounts payable and other liabilities	(34)	(97)
Net cash flows from operating activities	463	651
Capital expenditures	(1,017)	(818)
Purchases of marketable securities	99	147
Proceeds from sales of marketable securities	95	125
Other, net	13	27
Net cash flows from investing activities	(1,008)	(813)
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	175	174
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	$ 231	$ 456

XML 74 R30.htm IDEA: XBRL DOCUMENT

Consolidated Statements of Cash Flows - MidAmerican Funding - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Net Income (Loss) Attributable to Parent	$ 1,306	$ 885
Allowance for equity funds	(70)	(45)
Deferred income taxes and amortization of investment tax credits	25	(264)
Other Noncash Income (Expense)	23	26
Increase (Decrease) in Accounts Receivable and Other Operating Assets	550	226
Derivative collateral, net	(30)	(5)
Pension and other postretirement benefit plans	(41)	(23)
Accrued property, income and other taxes, net	(140)	174
Accounts payable and other liabilities	32	16
Net cash flows from operating activities	2,134	2,818
Capital expenditures	(2,750)	(2,779)
Purchases of marketable securities	(190)	(209)
Proceeds from sales of marketable securities	185	184
Other, net	36	43
Net cash flows from investing activities	(2,959)	(3,019)
Net proceeds from (repayments of) short-term debt	64	(1,048)
Other, net	(25)	(23)
Net cash flows from financing activities	1,447	465
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect	623	261
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	1,506	1,544
MidAmerican Funding, LLC and Subsidiaries [Domain]
Net Income (Loss) Attributable to Parent	343	206
Depreciation and amortization	356	366
Amortization of Utility Plant to Other Operating Expense	17	17
Allowance for equity funds	(32)	(23)
Deferred income taxes and amortization of investment tax credits	52	(10)
Other Noncash Income (Expense)	7	9
Increase (Decrease) in Accounts Receivable and Other Operating Assets	5	(4)
Increase (Decrease) in Inventories	20	45
Derivative collateral, net	1	0
Pension and other postretirement benefit plans	(6)	(7)
Accrued property, income and other taxes, net	(265)	143
Accounts payable and other liabilities	(34)	(96)
Net cash flows from operating activities	454	654
Capital expenditures	(1,017)	(818)
Purchases of marketable securities	(99)	(147)
Proceeds from sales of marketable securities	95	125
Other, net	13	27
Net cash flows from investing activities	(1,008)	(813)
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	10	(3)
Net proceeds from (repayments of) short-term debt	(240)	0
Other, net	(1)	0
Net cash flows from financing activities	729	334
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect	175	175
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	$ 232	$ 457

XML 75 R31.htm IDEA: XBRL DOCUMENT

Consolidated Statements of Cash Flows - NPC - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Net Income (Loss) Attributable to Parent	$ 1,306	$ 885
Allowance for equity funds	(70)	(45)
Changes in regulatory assets and liabilities	1	206
Deferred income taxes and amortization of investment tax credits	25	(264)
Other Noncash Income (Expense)	23	26
Trade receivables and other assets	(550)	(226)
Accrued property, income and other taxes, net	(140)	174
Accounts payable and other liabilities	32	16
Net cash flows from operating activities	2,134	2,818
Capital expenditures	(2,750)	(2,779)
Net cash flows from investing activities	(2,959)	(3,019)
Other, net	(25)	(23)
Net cash flows from financing activities	1,447	465
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect	623	261
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	1,506	1,544
Nevada Power Company [Member]
Net Income (Loss) Attributable to Parent	75	64
Depreciation and amortization	178	168
Allowance for equity funds	(2)	(1)
Changes in regulatory assets and liabilities	3	28
Deferred income taxes and amortization of investment tax credits	(9)	(14)
Deferred Energy Change	13	25
Amortization of Deferred Charges	12	7
Other Noncash Income (Expense)	(6)	9
Trade receivables and other assets	(47)	(62)
Increase (Decrease) in Inventories	(3)	1
Accrued property, income and other taxes, net	21	12
Accounts payable and other liabilities	30	13
Net cash flows from operating activities	265	250
Capital expenditures	(191)	(135)
Proceeds from Sale of Other Assets, Investing Activities	2	1
Net cash flows from investing activities	(189)	(134)
Proceeds from Issuance of Long-term Debt	495	573
Repayments of BHE senior debt and junior subordinated debentures	(500)	(325)
Payments of Ordinary Dividends, Common Stock	(95)	0
Other, net	(7)	(7)
Net cash flows from financing activities	(107)	241
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect	(31)	357
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	$ 90	$ 423

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Consolidated Statements of Cash Flows - SPPC - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Net Income (Loss) Attributable to Parent	$ 1,306	$ 885
Allowance for equity funds	(70)	(45)
Changes in regulatory assets and liabilities	1	206
Deferred income taxes and amortization of investment tax credits	25	(264)
Other Noncash Income (Expense)	(23)	(26)
Trade receivables and other assets	(550)	(226)
Accrued property, income and other taxes, net	(140)	174
Accounts payable and other liabilities	32	16
Net cash flows from operating activities	2,134	2,818
Capital expenditures	(2,750)	(2,779)
Net cash flows from investing activities	(2,959)	(3,019)
Other, net	(25)	(23)
Net cash flows from financing activities	1,447	465
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect	623	261
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	1,506	1,544
Sierra Pacific Power Company [Member]
Net Income (Loss) Attributable to Parent	36	41
Depreciation and amortization	63	59
Allowance for equity funds	(1)	(2)
Changes in regulatory assets and liabilities	20	19
Deferred income taxes and amortization of investment tax credits	2	2
Deferred Energy Change	(13)	26
Amortization of Deferred Charges	(6)	(5)
Other Noncash Income (Expense)	1	0
Trade receivables and other assets	12	21
Increase (Decrease) in Inventories	8	0
Accrued property, income and other taxes, net	7	11
Accounts payable and other liabilities	(23)	(10)
Net cash flows from operating activities	88	162
Capital expenditures	(99)	(94)
Net cash flows from investing activities	(99)	(94)
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	(2)	(1)
Net cash flows from financing activities	(32)	(1)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect	(43)	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	$ 33	$ 75

XML 77 R33.htm IDEA: XBRL DOCUMENT

General	6 Months Ended
General	Jun. 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 June 30, 2019 and for the three- and six-month periods ended June 30, 2019 and 2018. The results of operations for the three- and six-month periods ended June 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 six-month period ended June 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 June 30, 2019 and for the three- and six-month periods ended June 30, 2019 and 2018. The Consolidated Statements of Comprehensive Income have been omitted as net income materially equals comprehensive income for the three- and six-month periods ended June 30, 2019 and 2018. The results of operations for the three- and six-month periods ended June 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 six-month period ended June 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 June 30, 2019, and for the three- and six-month periods ended June 30, 2019 and 2018. The Statements of Comprehensive Income have been omitted as net income equals comprehensive income for the three- and six-month periods ended June 30, 2019 and 2018. The results of operations for the three- and six-month periods ended June 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 six-month period ended June 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 June 30, 2019, and for the three- and six-month periods ended June 30, 2019 and 2018. The Consolidated Statements of Comprehensive Income have been omitted as net income materially equals comprehensive income for the three- and six-month periods ended June 30, 2019 and 2018. The results of operations for the three- and six-month periods ended June 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 six-month period ended June 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 June 30, 2019 and for the three- and six-month periods ended June 30, 2019 and 2018. The Consolidated Statements of Comprehensive Income have been omitted as net income equals comprehensive income for the three- and six-month periods ended June 30, 2019 and 2018. The results of operations for the three- and six-month periods ended June 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 six-month period ended June 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 June 30, 2019 and for the three- and six-month periods ended June 30, 2019 and 2018. The Statements of Comprehensive Income have been omitted as net income equals comprehensive income for the three- and six-month periods ended June 30, 2019 and 2018. The results of operations for the three- and six-month periods ended June 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 six-month period ended June 30, 2019.

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New Accounting Pronouncements	6 Months Ended
New Accounting Pronouncements	Jun. 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 creates FASB Accounting Standards Codification ("ASC") Topic 842, "Leases" and supersedes Topic 840 "Leases." This guidance increases transparency and comparability among entities by recording lease assets and lease liabilities on the balance sheet and disclosing key information about leasing arrangements. A lessee should recognize on the balance sheet a liability to make lease payments (the lease liability) and a right-of-use asset representing its right to use the underlying asset for the lease term. The recognition, measurement, and presentation of expenses and cash flows arising from a lease by a lessee have not significantly changed from previous guidance. Following the issuance of ASU No. 2016-02, the FASB issued several ASUs that clarified the implementation guidance for ASU No. 2016-02 but did not change the core principle of the guidance. MidAmerican Energy 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.

XML 79 R35.htm IDEA: XBRL DOCUMENT

Investments and Restricted Cash and Investments

6 Months Ended

Jun. 30, 2019

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
	June 30,		December 31,
	2019		2018
Investments:
BYD Company Limited common stock	$	1,358	$	1,435
Rabbi trusts	392		371
Other	181		168
Total investments	1,931		1,974

Equity method investments:
BHE Renewables tax equity investments	1,797		1,661
Electric Transmission Texas, LLC	537		527
Bridger Coal Company	89		99
Other	172		153
Total equity method investments	2,595		2,440

Restricted cash and cash equivalents and investments:
Quad Cities Station nuclear decommissioning trust funds	562		504
Restricted cash and cash equivalents	241		256
Total restricted cash and cash equivalents and investments	803		760

Total investments and restricted cash and cash equivalents and investments	$	5,329	$	5,174

Reflected as:
Current assets	$	237	$	271
Noncurrent assets	5,092		4,903
Total investments and restricted cash and cash equivalents and investments	$	5,329	$	5,174

Investments

Gains (losses) on marketable securities, net recognized during the period consists of the following (in millions):



	Three-Month Periods						Six-Month Periods
	Ended June 30,						Ended June 30,
	2019			2018			2019			2018
Unrealized gains (losses) recognized on marketable securities still held at the reporting date	$	7		$	(386	)	$	(61	)	$	(597	)
Net (losses) gains recognized on marketable securities sold during the period	(1		)	(1		)	(1		)	1
Gains (losses) on marketable securities, net	$	6		$	(387	)	$	(62	)	$	(596	)

Cash and Cash Equivalents and Restricted Cash and Cash Equivalents



	As of
	June 30,		December 31,
	2019		2018
Cash and cash equivalents	$	1,265	$	627
Restricted cash and cash equivalents	214		227
Investments and restricted cash and cash equivalents and investments	27		29
Total cash and cash equivalents and restricted cash and cash equivalents	$	1,506	$	883

XML 80 R36.htm IDEA: XBRL DOCUMENT

Property, Plant and Equipment, Net

6 Months Ended

Jun. 30, 2019

Property, plant and equipment, net consists of the following (in millions):



		As of
	Depreciable	June 30,			December 31,
	Life	2019			2018
Regulated assets:
Utility generation, transmission and distribution systems	5-80 years	$	78,087		$	76,707
Interstate natural gas pipeline assets	3-80 years	7,571			7,524
		85,658			84,231
Accumulated depreciation and amortization		(26,637		)	(25,894		)
Regulated assets, net		59,021			58,337

Nonregulated assets:
Independent power plants	5-30 years	6,962			6,826
Other assets	3-30 years	1,625			1,424
		8,587			8,250
Accumulated depreciation and amortization		(2,000		)	(1,610		)
Nonregulated assets, net		6,587			6,640

Net operating assets		65,608			64,977
Construction work-in-progress		4,331			3,110
Property, plant and equipment, net		$	69,939		$	68,087

Construction work-in-progress includes $4.1 billion as of June 30, 2019 and $2.9 billion as of December 31, 2018, related to the construction of regulated assets.

Property, plant and equipment, net consists of the following (in millions):



		As of
		June 30,			December 31,
	Depreciable Life	2019			2018
Utility plant in service, net:
Generation	20-70 years	$	14,124		$	13,727
Transmission	52-75 years	1,974			1,934
Electric distribution	20-75 years	3,786			3,672
Natural gas distribution	29-75 years	1,750			1,724
Utility plant in service		21,634			21,057
Accumulated depreciation and amortization		(6,201		)	(5,941		)
Utility plant in service, net		15,433			15,116
Nonregulated property, net:
Nonregulated property gross	20-50 years	7			7
Accumulated depreciation and amortization		(1		)	(1		)
Nonregulated property, net		6			6
		15,439			15,122
Construction work-in-progress		1,513			1,035
Property, plant and equipment, net		$	16,952		$	16,157

Property, plant and equipment, net consists of the following (in millions):



		As of
		June 30,			December 31,
	Depreciable Life	2019			2018
Utility Plant:
Generation	14 - 67 years	$	12,588		$	12,606
Transmission	58 - 75 years	6,451			6,357
Distribution	20 - 70 years	7,150			7,030
Intangible plant⁽¹⁾	5 - 75 years	974			970
Other	5 - 60 years	1,425			1,436
Utility plant in service		28,588			28,399
Accumulated depreciation and amortization		(10,234		)	(10,034		)
Utility plant in-service, net		18,354			18,365
Other non-regulated, net of accumulated depreciation and amortization	47 years	10			10
Plant, net		18,364			18,375
Construction work-in-progress		1,792			1,195
Property, plant and equipment, net		$	20,156		$	19,570


(1)	Computer software costs included in intangible plant are initially assigned a depreciable life of 5 to 10 years.

Property, plant and equipment, net consists of the following (in millions):



		As of
	Depreciable Life	June 30,			December 31,
	Depreciable Life	2019			2018
Utility plant:
Generation	30 - 55 years	$	3,724		$	3,720
Distribution	20 - 65 years	3,472			3,411
Transmission	45 - 70 years	1,446			1,439
General and intangible plant	5 - 65 years	709			716
Utility plant		9,351			9,286
Accumulated depreciation and amortization		(3,027		)	(2,966		)
Utility plant, net		6,324			6,320
Other non-regulated, net of accumulated depreciation and amortization	45 years	1			1
Plant, net		6,325			6,321
Construction work-in-progress		132			97
Property, plant and equipment, net		$	6,457		$	6,418

Property, plant and equipment, net consists of the following (in millions):



		As of
	Depreciable Life	June 30,			December 31,
	Depreciable Life	2019			2018
Utility plant:
Electric generation	25 - 60 years	$	1,134		$	1,132
Electric distribution	20 - 100 years	1,631			1,568
Electric transmission	50 - 100 years	828			812
Electric general and intangible plant	5 - 70 years	177			185
Natural gas distribution	35 - 70 years	408			403
Natural gas general and intangible plant	5 - 70 years	14			14
Common general	5 - 70 years	318			321
Utility plant		4,510			4,435
Accumulated depreciation and amortization		(1,604		)	(1,583		)
Utility plant, net		2,906			2,852
Other non-regulated, net of accumulated depreciation and amortization	70 years	5			5
Plant, net		2,911			2,857
Construction work-in-progress		81			90
Property, plant and equipment, net		$	2,992		$	2,947

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Regulatory Matters	6 Months Ended
Regulatory Matters	Jun. 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. 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.
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. 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.

XML 82 R38.htm IDEA: XBRL DOCUMENT

Cash and Cash Equivalents and Restricted Cash and Cash Equivalents Supplemental Cash Flow Disclosures (Notes)

6 Months Ended

Jun. 30, 2019

Condensed Cash Flow Statements, Captions [Line Items]

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 June 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 June 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
	June 30,		December 31,
	2019		2018
Cash and cash equivalents	$	28	$	71
Restricted cash and cash equivalents included in other current assets	5		5
Total cash and cash equivalents and restricted cash and cash equivalents	$	33	$	76

Condensed Cash Flow Statements, Captions [Line Items]

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 June 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 June 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
	June 30,		December 31,
	2019		2018
Cash and cash equivalents	$	81	$	111
Restricted cash and cash equivalents included in other current assets	9		10
Total cash and cash equivalents and restricted cash and cash equivalents	$	90	$	121

Condensed Cash Flow Statements, Captions [Line Items]

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 June 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
	June 30,		December 31,
	2019		2018
Cash and cash equivalents	$	536	$	77
Restricted cash included in other current assets	16		13
Restricted cash included in other assets	2		2
Total cash and cash equivalents and restricted cash and cash equivalents	$	554	$	92

Condensed Cash Flow Statements, Captions [Line Items]

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 June 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 June 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
	June 30		December 31
	2019		2018

Cash and cash equivalents	$	186	$	1
Restricted cash and cash equivalents in other current assets	46		56
Total cash and cash equivalents and restricted cash and cash equivalents	$	232	$	57

Condensed Cash Flow Statements, Captions [Line Items]

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 June 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 June 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
	June 30,		December 31
	2019		2018

Cash and cash equivalents	$	185	$	—
Restricted cash and cash equivalents in other current assets	46		56
Total cash and cash equivalents and restricted cash and cash equivalents	$	231	$	56

XML 83 R39.htm IDEA: XBRL DOCUMENT

Leases Leases (Notes)

6 Months Ended

Jun. 30, 2019

Leases

Adoption

Leases

Lessee



	As of
	June 30,
	2019
Right-of-use assets:
Operating leases	$	553
Finance leases	509
Total right-of-use assets	$	1,062

Lease liabilities:
Operating leases	$	597
Finance leases	523
Total lease liabilities	$	1,120

The following table summarizes the Company's lease costs (in millions):



	Three-Month Period		Six-Month Period
	Ended June 30,		Ending June 30,
	2019		2019

Variable	$	153	$	296
Operating	41		82
Finance:
Amortization	4		8
Interest	10		21
Short-term	1		3
Total lease costs	$	209	$	410

Weighted-average remaining lease term (years):
Operating leases			8.0
Finance leases			29.1

Weighted-average discount rate:
Operating leases			5.2		%
Finance leases			8.7		%

The following table summarizes the Company's supplemental cash flow information relating to leases (in millions):



	Six-Month Period
	Ended June 30,
	2019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$	(70	)
Operating cash flows from finance leases	(22		)
Financing cash flows from finance leases	(9		)
Right-of-use assets obtained in exchange for lease liabilities:
Operating leases	$	49
Finance leases	6

The Company has the following remaining lease commitments as of (in millions):



	June 30, 2019									December 31, 2018⁽¹⁾
	Operating			Finance			Total			Operating		Capital		Total
2019	$	77		$	39		$	116		$	147	$	69	$	216
2020	139			69			208			128		68		196
2021	117			75			192			110		73		183
2022	93			68			161			87		67		154
2023	66			57			123			61		56		117
Thereafter	236			776			1,012			159		772		931
Total undiscounted lease payments	728			1,084			1,812			$	692	$	1,105	$	1,797
Less - amounts representing interest	(131		)	(561		)	(692		)
Lease liabilities	$	597		$	523		$	1,120

(1) Amounts included for comparability and accounted for in accordance with ASC 840, "Leases".

Leases

Adoption

Leases

Lessee



	As of
	June 30,
	2019
Right-of-use assets:
Operating leases	$	553
Finance leases	509
Total right-of-use assets	$	1,062

Lease liabilities:
Operating leases	$	597
Finance leases	523
Total lease liabilities	$	1,120

The following table summarizes the Company's lease costs (in millions):



	Three-Month Period		Six-Month Period
	Ended June 30,		Ending June 30,
	2019		2019

Variable	$	153	$	296
Operating	41		82
Finance:
Amortization	4		8
Interest	10		21
Short-term	1		3
Total lease costs	$	209	$	410

Weighted-average remaining lease term (years):
Operating leases			8.0
Finance leases			29.1

Weighted-average discount rate:
Operating leases			5.2		%
Finance leases			8.7		%

The following table summarizes the Company's supplemental cash flow information relating to leases (in millions):



	Six-Month Period
	Ended June 30,
	2019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$	(70	)
Operating cash flows from finance leases	(22		)
Financing cash flows from finance leases	(9		)
Right-of-use assets obtained in exchange for lease liabilities:
Operating leases	$	49
Finance leases	6

The Company has the following remaining lease commitments as of (in millions):



	June 30, 2019									December 31, 2018⁽¹⁾
	Operating			Finance			Total			Operating		Capital		Total
2019	$	77		$	39		$	116		$	147	$	69	$	216
2020	139			69			208			128		68		196
2021	117			75			192			110		73		183
2022	93			68			161			87		67		154
2023	66			57			123			61		56		117
Thereafter	236			776			1,012			159		772		931
Total undiscounted lease payments	728			1,084			1,812			$	692	$	1,105	$	1,797
Less - amounts representing interest	(131		)	(561		)	(692		)
Lease liabilities	$	597		$	523		$	1,120

(1) Amounts included for comparability and accounted for in accordance with ASC 840, "Leases".

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.

Leases

Lessee



	As of
	June 30,
	2019
Right-of-use assets:
Operating leases	$	14
Finance leases	20
Total right-of-use assets	$	34

Lease liabilities:
Operating leases	$	14
Finance leases	20
Total lease liabilities	$	34

The following table summarizes PacifiCorp's lease costs (in millions):



	Three-Month Period		Six-Month Period
	Ended June 30,		Ended June 30,
	2019		2019

Variable	$	16	$	26
Operating	1		1
Finance:
Amortization	—		1
Interest	1		1
Short-term	1		1
Total lease costs	$	19	$	30

Weighted-average remaining lease term (years):
Operating leases			13.6
Finance leases			9.5

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 six-month periods ended June 30, 2019 and 2018, respectively.

PacifiCorp has the following remaining lease commitments as of (in millions):



	June 30, 2019									December 31, 2018⁽¹⁾
	Operating			Finance			Total			Operating		Capital		Total
2019	$	2		$	2		$	4		$	3	$	4	$	7
2020	2			3			5			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	8			16			24			7		16		23
Total undiscounted lease payments	18			33			51			$	20	$	36	$	56
Less - amounts representing interest	(4		)	(13		)	(17		)
Lease liabilities	$	14		$	20		$	34

(1) Amounts included for comparability and accounted for in accordance with ASC 840, "Leases".

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.

Leases

Lessee



	As of
	June 30,
	2019
Right-of-use assets:
Operating leases	$	14
Finance leases	20
Total right-of-use assets	$	34

Lease liabilities:
Operating leases	$	14
Finance leases	20
Total lease liabilities	$	34

The following table summarizes PacifiCorp's lease costs (in millions):



	Three-Month Period		Six-Month Period
	Ended June 30,		Ended June 30,
	2019		2019

Variable	$	16	$	26
Operating	1		1
Finance:
Amortization	—		1
Interest	1		1
Short-term	1		1
Total lease costs	$	19	$	30

Weighted-average remaining lease term (years):
Operating leases			13.6
Finance leases			9.5

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 six-month periods ended June 30, 2019 and 2018, respectively.

PacifiCorp has the following remaining lease commitments as of (in millions):



	June 30, 2019									December 31, 2018⁽¹⁾
	Operating			Finance			Total			Operating		Capital		Total
2019	$	2		$	2		$	4		$	3	$	4	$	7
2020	2			3			5			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	8			16			24			7		16		23
Total undiscounted lease payments	18			33			51			$	20	$	36	$	56
Less - amounts representing interest	(4		)	(13		)	(17		)
Lease liabilities	$	14		$	20		$	34

(1) Amounts included for comparability and accounted for in accordance with ASC 840, "Leases".

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.

Leases

Lessee



	As of
	June 30,
	2019
Right-of-use assets:
Operating leases	$	14
Finance leases	449
Total right-of-use assets	$	463

Lease liabilities:
Operating leases	$	18
Finance leases	462
Total lease liabilities	$	480

The following table summarizes Nevada Power's lease costs (in millions):



	Three-Month Period		Six-Month Period
	Ended June 30,		Ended June 30,
	2019		2019

Variable	$	112	$	220
Operating	—		1
Finance:
Amortization	3		6
Interest	10		20
Total lease costs	$	125	$	247

Weighted-average remaining lease term (years):
Operating leases			7.7
Finance leases			30.8

Weighted-average discount rate:
Operating leases			4.4		%
Finance leases			8.6		%

The following table summarizes Nevada Power's supplemental cash flow information relating to leases (in millions):



	Six-Month Period
	Ended June 30,
	2019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$	(1	)
Operating cash flows from finance leases	(20		)
Financing cash flows from finance leases	(7		)
Right-of-use assets obtained in exchange for lease liabilities:
Finance leases	$	4

Nevada Power has the following remaining lease commitments as of (in millions):



	June 30, 2019									December 31, 2018⁽¹⁾
	Operating			Finance			Total			Operating		Capital		Total
2019	$	1		$	34		$	35		$	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			50			52			2		50		52
Thereafter	10			712			722			10		709		719
Total undiscounted lease payments	21			979			1,000			$	24	$	998	$	1,022
Less - amounts representing interest	(3		)	(517		)	(520		)
Lease liabilities	$	18		$	462		$	480

(1) Amounts included for comparability and accounted for in accordance with ASC Topic 840, "Leases".

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.

Leases

Lessee



	As of
	June 30,
	2019
Right-of-use assets:
Operating leases	$	14
Finance leases	449
Total right-of-use assets	$	463

Lease liabilities:
Operating leases	$	18
Finance leases	462
Total lease liabilities	$	480

The following table summarizes Nevada Power's lease costs (in millions):



	Three-Month Period		Six-Month Period
	Ended June 30,		Ended June 30,
	2019		2019

Variable	$	112	$	220
Operating	—		1
Finance:
Amortization	3		6
Interest	10		20
Total lease costs	$	125	$	247

Weighted-average remaining lease term (years):
Operating leases			7.7
Finance leases			30.8

Weighted-average discount rate:
Operating leases			4.4		%
Finance leases			8.6		%

The following table summarizes Nevada Power's supplemental cash flow information relating to leases (in millions):



	Six-Month Period
	Ended June 30,
	2019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$	(1	)
Operating cash flows from finance leases	(20		)
Financing cash flows from finance leases	(7		)
Right-of-use assets obtained in exchange for lease liabilities:
Finance leases	$	4

Nevada Power has the following remaining lease commitments as of (in millions):



	June 30, 2019									December 31, 2018⁽¹⁾
	Operating			Finance			Total			Operating		Capital		Total
2019	$	1		$	34		$	35		$	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			50			52			2		50		52
Thereafter	10			712			722			10		709		719
Total undiscounted lease payments	21			979			1,000			$	24	$	998	$	1,022
Less - amounts representing interest	(3		)	(517		)	(520		)
Lease liabilities	$	18		$	462		$	480

(1) Amounts included for comparability and accounted for in accordance with ASC Topic 840, "Leases".

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.

Leases

Lessee



	As of
	June 30,
	2019
Right-of-use assets:
Operating leases	$	19
Finance leases	39
Total right-of-use assets	$	58

Lease liabilities:
Operating leases	$	19
Finance leases	40
Total lease liabilities	$	59

The following table summarizes Sierra Pacific's lease costs (in millions):



	Three-Month Period		Six-Month Period
	Ended June 30,		Ended June 30,
	2019		2019

Variable	$	15	$	30
Operating	1		1
Finance:
Amortization	—		1
Interest	—		1
Total lease costs	$	16	$	33

Weighted-average remaining lease term (years):
Operating leases			26.0
Finance leases			23.0

Weighted-average discount rate:
Operating leases			4.9		%
Finance leases			7.0		%

The following table summarizes Sierra Pacific's supplemental cash flow information relating to leases (in millions):



	Six-Month Period
	Ended June 30,
	2019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$	(1	)
Operating cash flows from finance leases	(1		)
Financing cash flows from finance leases	(1		)
Right-of-use assets obtained in exchange for lease liabilities:
Finance leases	$	2

Sierra Pacific has the following remaining lease commitments as of (in millions):



	June 30, 2019									December 31, 2018⁽¹⁾
	Operating			Finance			Total			Operating		Capital		Total
2019	$	2		$	3		$	5		$	2	$	6	$	8
2020	2			5			7			2		4		6
2021	2			5			7			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	35			71			106			$	36	$	70	$	106
Less - amounts representing interest	(16		)	(31		)	(47		)
Lease liabilities	$	19		$	40		$	59

(1) Amounts included for comparability and accounted for in accordance with ASC Topic 840, "Leases".

Schedule of Effective Income Tax Rate Reconciliation [Line Items]

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.

Leases

Lessee



	As of
	June 30,
	2019
Right-of-use assets:
Operating leases	$	19
Finance leases	39
Total right-of-use assets	$	58

Lease liabilities:
Operating leases	$	19
Finance leases	40
Total lease liabilities	$	59

The following table summarizes Sierra Pacific's lease costs (in millions):



	Three-Month Period		Six-Month Period
	Ended June 30,		Ended June 30,
	2019		2019

Variable	$	15	$	30
Operating	1		1
Finance:
Amortization	—		1
Interest	—		1
Total lease costs	$	16	$	33

Weighted-average remaining lease term (years):
Operating leases			26.0
Finance leases			23.0

Weighted-average discount rate:
Operating leases			4.9		%
Finance leases			7.0		%

The following table summarizes Sierra Pacific's supplemental cash flow information relating to leases (in millions):



	Six-Month Period
	Ended June 30,
	2019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$	(1	)
Operating cash flows from finance leases	(1		)
Financing cash flows from finance leases	(1		)
Right-of-use assets obtained in exchange for lease liabilities:
Finance leases	$	2

Sierra Pacific has the following remaining lease commitments as of (in millions):



	June 30, 2019									December 31, 2018⁽¹⁾
	Operating			Finance			Total			Operating		Capital		Total
2019	$	2		$	3		$	5		$	2	$	6	$	8
2020	2			5			7			2		4		6
2021	2			5			7			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	35			71			106			$	36	$	70	$	106
Less - amounts representing interest	(16		)	(31		)	(47		)
Lease liabilities	$	19		$	40		$	59

(1) Amounts included for comparability and accounted for in accordance with ASC Topic 840, "Leases".

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Recent Financing Transactions	6 Months Ended
Recent Financing Transactions	Jun. 30, 2019
Debt Instrument [Line Items]
Recent Financing Transactions	Recent Financing Transactions Long-Term Debt 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 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 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. 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. Credit Facilities 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 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.

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Income Taxes

6 Months Ended

Jun. 30, 2019

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				Six-Month Periods
	Ended June 30,				Ended June 30,
	2019		2018		2019		2018

Federal statutory income tax rate	21	%	21	%	21	%	21	%
Income tax credits	(29	)	(78	)	(29	)	(58	)
State income tax, net of federal income tax benefit	—		(19	)	(8	)	(25	)
Income tax effect of foreign income	(1	)	(4	)	(2	)	(11	)
Effects of ratemaking	(2	)	(8	)	(2	)	(8	)
Equity income	—		1		—		1
Other, net	(1	)	1		—		(1	)
Effective income tax rate	(12	)%	(86	)%	(20	)%	(81	)%

Schedule of Effective Income Tax Rate Reconciliation [Line Items]


	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				Six-Month Periods
	Ended June 30,				Ended June 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	(4	)	(5	)	(4	)	(5	)
Effects of ratemaking	(1	)	(4	)	(1	)	(4	)
Other	(1	)	(3	)	—		(2	)
Effective income tax rate	18	%	13	%	19	%	14	%

Schedule of Effective Income Tax Rate Reconciliation [Line Items]

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				Six-Month Periods
	Ended June 30,				Ended June 30,
	2019		2018		2019		2018

Federal statutory income tax rate	21	%	21	%	21	%	21	%
Nondeductible expenses	—		8		—		3
Effects of ratemaking	1		14		1		(1	)
Other	—		3		—		—
Effective income tax rate	22	%	46	%	22	%	23	%

Schedule of Effective Income Tax Rate Reconciliation [Line Items]

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				Six-Month Periods
	Ended June 30,				Ended June 30,
	2019		2018		2019		2018

Federal statutory income tax rate	21	%	21	%	21	%	21	%
Income tax credits	(158	)	(80	)	(131	)	(104	)
State income tax, net of federal income tax benefit	(22	)	(7	)	(21	)	(8	)
Effects of ratemaking	(10	)	(9	)	(9	)	(13	)
Other, net	—		(2	)	(1	)	—
Effective income tax rate	(169	)%	(77	)%	(141	)%	(104	)%

Schedule of Effective Income Tax Rate Reconciliation [Line Items]

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				Six-Month Periods
	Ended June 30,				Ended June 30,
	2019		2018		2019		2018

Federal statutory income tax rate	21	%	21	%	21	%	21	%
Income tax credits	(171	)	(86	)	(139	)	(113	)
State income tax, net of federal income tax benefit	(25	)	(8	)	(23	)	(9	)
Effects of ratemaking	(11	)	(10	)	(9	)	(14	)
Other, net	3		(1	)	—		—
Effective income tax rate	(183	)%	(84	)%	(150	)%	(115	)%

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 six-month periods ended June 30, 2019 and 2018 were $190 million and $108 million, respectively with $56 million of the difference related to the change in the method of interim 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 made net cash payments for income tax to BHE totaling $8 million for the six-month period ended June 30, 2019, and received net cash payments for income tax from BHE totaling $234 million for the six-month period ended June 30, 2018.

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Employee Benefit Plans

6 Months Ended

Jun. 30, 2019

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						Six-Month Periods
	Ended June 30,						Ended June 30,
	2019			2018			2019			2018
Pension:
Service cost	$	4		$	5		$	8		$	10
Interest cost	28			26			55			52
Expected return on plan assets	(39		)	(41		)	(77		)	(82		)
Net amortization	7			7			16			15
Net periodic benefit cost (credit)	$	—		$	(3	)	$	2		$	(5	)

Other postretirement:
Service cost	$	3		$	3		$	5		$	5
Interest cost	8			6			14			12
Expected return on plan assets	(10		)	(12		)	(20		)	(22		)
Net amortization	(1		)	(3		)	(3		)	(6		)
Net periodic benefit credit	$	—		$	(6	)	$	(4	)	$	(11	)

Foreign Operations

Net periodic benefit cost for the United Kingdom pension plan included the following components (in millions):



	Three-Month Periods						Six-Month Periods
	Ended June 30,						Ended June 30,
	2019			2018			2019			2018

Service cost	$	4		$	5		$	8		$	10
Interest cost	13			14			26			28
Expected return on plan assets	(25		)	(26		)	(50		)	(53		)
Settlement	—			24			—			24
Net amortization	9			14			18			29
Net periodic benefit cost	$	1		$	31		$	2		$	38


	Employee Benefit Plans

Net periodic benefit credit for the pension and other postretirement benefit plans included the following components (in millions):



	Three-Month Periods						Six-Month Periods
	Ended June 30,						Ended June 30,
	2019			2018			2019		2018
Pension:
Service cost	$	—		$	—		—		—
Interest cost	11			10			22		21
Expected return on plan assets	(16		)	(18		)	(33	)	(36	)
Net amortization	3			4			6		7
Net periodic benefit credit	$	(2	)	$	(4	)	(5	)	(8	)

Other postretirement:
Service cost	$	1		$	1		1		1
Interest cost	3			3			6		6
Expected return on plan assets	(5		)	(6		)	(10	)	(11	)
Net amortization	—			(2		)	—		(3	)
Net periodic benefit credit	$	(1	)	$	(4	)	(3	)	(7	)

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 June 30, 2019, $2 million and $- million of contributions had been made to the pension and other postretirement benefit plans, respectively.

Net periodic benefit (credit) cost for the plans of MidAmerican Energy and the aforementioned affiliates included the following components (in millions):



	Three-Month Periods						Six-Month Periods
	Ended June 30,						Ended June 30,
	2019			2018			2019			2018
Pension:
Service cost	$	1		$	2		$	3		$	4
Interest cost	8			7			15			14
Expected return on plan assets	(11		)	(11		)	(21		)	(22		)
Net amortization	—			—			—			1
Net periodic benefit credit	$	(2	)	$	(2	)	$	(3	)	$	(3	)

Other postretirement:
Service cost	$	2		$	2		$	3		$	3
Interest cost	3			2			5			4
Expected return on plan assets	(3		)	(4		)	(6		)	(7		)
Net amortization	(1		)	(1		)	(2		)	(2		)
Net periodic benefit cost (credit)	$	1		$	(1	)	$	—		$	(2	)

Refer to Note 7 of MidAmerican Energy's Notes to Financial Statements.

Amounts payable to NV Energy are included on the Consolidated Balance Sheets and consist of the following (in millions):



	As of
	June 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

Asset Retirement Obligations Disclosure [Line Items]

Amounts payable to NV Energy are included on the Balance Sheets and consist of the following (in millions):



	As of
	June 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

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Asset Retirement Obligation Asset Retirement Obligations (Notes)

6 Months Ended

Jun. 30, 2019

Schedule of Change in Asset Retirement Obligation [Table Text Block]

Asset Retirement Obligations

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 six-month period ended June 30, 2019 (in millions):



Beginning balance	$	562
Change in estimated costs	237
Retirements	(1		)
Accretion	14
Ending balance	$	812

Asset Retirement Obligation Disclosure [Text Block]

Asset Retirement Obligations



Beginning balance	$	562
Change in estimated costs	237
Retirements	(1		)
Accretion	14
Ending balance	$	812

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.

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Risk Management and Hedging Activities

6 Months Ended

Jun. 30, 2019

Risk Management and Hedging Activities

Derivative [Line Items]


	Risk Management and Hedging Activities

There have been no significant changes in PacifiCorp's accounting policies related to derivatives. Refer to Note 9 for additional information on derivative contracts.



	Other						Other			Other
	Current			Other			Current			Long-term
	Assets			Assets			Liabilities			Liabilities			Total

As of June 30, 2019
Not designated as hedging contracts⁽¹⁾:
Commodity assets	$	13		$	5		$	9		$	—		$	27
Commodity liabilities	(6		)	(1		)	(63		)	(59		)	(129		)
Total	7			4			(54		)	(59		)	(102		)

Total derivatives	7			4			(54		)	(59		)	(102		)
Cash collateral (payable) receivable	(1		)	—			19			37			55
Total derivatives - net basis	$	6		$	4		$	(35	)	$	(22	)	$	(47	)

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 June 30, 2019 and December 31, 2018, a regulatory asset of $101 million and $96 million, respectively, was recorded related to the net derivative liability of $102 million and $97 million, respectively.



	Three-Month Periods						Six-Month Periods
	Ended June 30,						Ended June 30,
	2019			2018			2019			2018

Beginning balance	$	78		$	122		$	96		$	101
Changes in fair value	26			6			(28		)	34
Net gains (losses) reclassified to operating revenue	6			(1		)	(16		)	6
Net (losses) gains reclassified to cost of fuel and energy	(9		)	(11		)	49			(25		)
Ending balance	$	101		$	116		$	101		$	116

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	June 30,		December 31,
	Measure	2019		2018

Electricity sales, net	Megawatt hours	(2	)	(6	)
Natural gas purchases	Decatherms	116		117

Credit Risk

Collateral and Contingent Features

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Fair Value Measurements

6 Months Ended

Jun. 30, 2019

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]


•	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 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 June 30, 2019
Assets:
Commodity derivatives	$	—		$	38		$	106		$	(25	)	$	119
Interest rate derivatives	—			6			25			—			31
Mortgage loans held for sale	—			1,065			—			—			1,065
Money market mutual funds⁽²⁾	951			—			—			—			951
Debt securities:
United States government obligations	193			—			—			—			193
International government obligations	—			4			—			—			4
Corporate obligations	—			49			—			—			49
Municipal obligations	—			2			—			—			2
Agency, asset and mortgage-backed obligations	—			1			—			—			1
Equity securities:
United States companies	311			—			—			—			311
International companies	1,358			—			—			—			1,358
Investment funds	182			—			—			—			182
	$	2,995		$	1,165		$	131		$	(25	)	$	4,266
Liabilities:
Commodity derivatives	$	(2	)	$	(187	)	$	(20	)	$	117		$	(92	)
Interest rate derivatives	(2		)	(24		)	(2		)	—			(28		)
	$	(4	)	$	(211	)	$	(22	)	$	117		$	(120	)



	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 $92 million and $59 million as of June 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.

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						Six-Month Periods
	Ended June 30,						Ended June 30,
				Interest						Interest
	Commodity			Rate			Commodity			Rate
	Derivatives			Derivatives			Derivatives			Derivatives
2019:
Beginning balance	$	86		$	18		$	99		$	10
Changes included in earnings	8			94			5			147
Changes in fair value recognized in OCI	(1		)	—			(1		)	—
Changes in fair value recognized in net regulatory assets	(12		)	—			(23		)	—
Purchases	3			—			4			—
Settlements	2			(89		)	2			(134		)
Ending balance	$	86		$	23		$	86		$	23



2018:
Beginning balance	$	81		$	16		$	94		$	9
Changes included in earnings	4			56			4			86
Changes in fair value recognized in OCI	1			—			—			—
Changes in fair value recognized in net regulatory assets	(5		)	—			(14		)	—
Purchases	—			—			1			—
Settlements	2			(55		)	(2		)	(78		)
Ending balance	$	83		$	17		$	83		$	17



	As of June 30, 2019				As of December 31, 2018
	Carrying		Fair		Carrying		Fair
	Value		Value		Value		Value

Long-term debt	$	38,096	$	43,822	$	36,250	$	38,874

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]


•	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 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 June 30, 2019
Assets:
Commodity derivatives	$	—	$	27		$	—	$	(17	)	$	10
Money market mutual funds⁽²⁾	442		—			—		—			442
Investment funds	25		—			—		—			25
	$	467	$	27		$	—	$	(17	)	$	477

Liabilities - Commodity derivatives	$	—	$	(129	)	$	—	$	72		$	(57	)

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 $55 million and $59 million as of June 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.



	As of June 30, 2019				As of December 31, 2018
	Carrying		Fair		Carrying		Fair
	Value		Value		Value		Value

Long-term debt	$	7,656	$	9,141	$	7,015	$	7,833

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

air Value Measurements


•	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 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 June 30, 2019:
Assets:
Commodity derivatives	$	—	$	1		$	1		$	(1	)	$	1
Money market mutual funds⁽²⁾	165		—			—			—			165
Debt securities:
United States government obligations	193		—			—			—			193
International government obligations	—		4			—			—			4
Corporate obligations	—		49			—			—			49
Municipal obligations	—		2			—			—			2
Agency, asset and mortgage-backed obligations	—		1			—			—			1
Equity securities:
United States companies	311		—			—			—			311
Investment funds	19		—			—			—			19
	$	688	$	57		$	1		$	(1	)	$	745

Liabilities - commodity derivatives	$	—	$	(5	)	$	(2	)	$	1		$	(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 $- million as of June 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.



	As of June 30, 2019				As of December 31, 2018
	Carrying Value		Fair Value		Carrying Value		Fair Value

Long-term debt	$	6,341	$	7,213	$	5,379	$	5,644

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]



	As of June 30, 2019				As of December 31, 2018
	Carrying Value		Fair Value		Carrying Value		Fair Value

Long-term debt	$	6,581	$	7,528	$	5,619	$	5,941

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]


•	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 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 June 30, 2019
Assets:
Money market mutual funds⁽¹⁾	$	71	$	—	$	—		$	71
Investment funds	2		—		—			2
	$	73	$	—	$	—		$	73

Liabilities - commodity derivatives	$	—	$	—	$	(11	)	$	(11	)

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 June 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.



	Three-Month Periods						Six-Month Periods
	Ended June 30,						Ended June 30,
	2019			2018			2019			2018

Beginning balance	$	(5	)	$	(8	)	$	3		$	(3	)
Changes in fair value recognized in regulatory assets	(8		)	(3		)	(17		)	(8		)
Settlements	2			2			3			2
Ending balance	$	(11	)	$	(9	)	$	(11	)	$	(9	)



	As of June 30, 2019				As of December 31, 2018
	Carrying		Fair		Carrying		Fair
	Value		Value		Value		Value

Long-term debt	$	2,350	$	2,787	$	2,353	$	2,651

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]


•	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 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 June 30, 2019
Assets:
Commodity derivatives	$	—	$	—	$	1		$	1
Money market mutual funds⁽¹⁾	25		—		—			25
	$	25	$	—	$	1		$	26

Liabilities - commodity derivatives	$	—	$	—	$	(3	)	$	(3	)

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.



	As of June 30, 2019				As of December 31, 2018
	Carrying		Fair		Carrying		Fair
	Value		Value		Value		Value

Long-term debt	$	1,135	$	1,240	$	1,120	$	1,167

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

XML 90 R46.htm IDEA: XBRL DOCUMENT

Commitments and Contingencies	6 Months Ended
Commitments and Contingencies	Jun. 30, 2019
Loss Contingencies [Line Items]
Commitments and Contingencies	Commitments and Contingencies Construction Commitments During the six-month period ended June 30, 2019, PacifiCorp entered into non-cancelable agreements through 2020 totaling $486 million related to repowering and development of certain existing and new wind facilities in Wyoming and Washington. Easements During the six-month period ended June 30, 2019, PacifiCorp and MidAmerican Energy entered into non-cancelable easements with minimum payments totaling $392 million through 2059 for land in Iowa, Wyoming and Montana, on which some of its wind-powered generating facilities will be located. Maintenance and Service Contracts During the six-month period ended June 30, 2019, PacifiCorp and MidAmerican Energy entered into non-cancelable maintenance and service contracts related to wind-powered generating facilities with minimum payment commitments totaling $474 million through 2030. 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 June 30, 2019, the Company's consolidated balance sheet includes $1.1 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 June 30, 2019, the Company's equity investment in Agua Caliente totals $56 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, California Governor Gavin Newsom 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) PacifiCorp can 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. 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 six-month period ended June 30, 2019, PacifiCorp entered into non-cancelable agreements through 2020 totaling $486 million related to repowering and development of certain existing and new wind facilities in Wyoming and Washington. Easements During the six-month period ended June 30, 2019, PacifiCorp entered into non-cancelable easements with minimum payments totaling $175 million through 2050 for land in Wyoming and Montana, on which some of its wind-powered generating facilities will be located. Maintenance and Service Contracts During the six-month period ended June 30, 2019, PacifiCorp entered into non-cancelable maintenance and service contracts related to wind-powered generating facilities with minimum payment commitments totaling $173 million through 2030. 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. 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 Easements During the six-month period ended June 30, 2019, MidAmerican Energy entered into non-cancelable easements with minimum payments totaling $217 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 six-month period ended June 30, 2019, MidAmerican Energy entered into non-cancelable maintenance and service contracts related to wind-powered generating facilities with minimum payment commitments totaling $301 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 June 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 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.

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Revenue from Contracts with Customers Revenue from Contracts with Customers (Notes)

6 Months Ended

Jun. 30, 2019

Revenue from Contracts with Customers

Energy Products and Services



	For the Three-Month Period Ended June 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	$	1,107	$	467	$	658	$	—	$	—	$	—	$	—	$	—		$	2,232
Retail gas	—		95		21		—		—		—		—		—			116
Wholesale	11		66		10		—		—		—		—		(1		)	86
Transmission and distribution	25		15		24		209		—		168		—		—			441
Interstate pipeline	—		—		—		—		212		—		—		(24		)	188
Other	—		—		—		—		—		—		—		—			—
Total Regulated	1,143		643		713		209		212		168		—		(25		)	3,063
Nonregulated	—		10		—		10		—		7		197		142			366
Total Customer Revenue	1,143		653		713		219		212		175		197		117			3,429
Other revenue	24		7		8		24		—		—		52		23			138
Total	$	1,167	$	660	$	721	$	243	$	212	$	175	$	249	$	140		$	3,567



	For the Six-Month Period Ended June 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	$	2,293	$	910	$	1,185	$	—	$	—		$	—	$	—	$	—		$	4,388
Retail gas	—		355		58		—		—			—		—		—			413
Wholesale	39		176		28		—		—			—		—		(1		)	242
Transmission and distribution	50		31		48		439		—			335		—		—			903
Interstate pipeline	—		—		—		—		584			—		—		(61		)	523
Other	—		—		1		—		—			—		—		—			1
Total Regulated	2,382		1,472		1,320		439		584			335		—		(62		)	6,470
Nonregulated	—		16		—		18		—			8		323		281			646
Total Customer Revenue	2,382		1,488		1,320		457		584			343		323		219			7,116
Other revenue⁽²⁾	44		14		15		49		(1		)	—		93		62			276
Total	$	2,426	$	1,502	$	1,335	$	506	$	583		$	343	$	416	$	281		$	7,392



	For the Three-Month Period Ended June 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	$	1,115	$	505	$	691	$	—	$	—	$	—	$	—	$	—		$	2,311
Retail gas	—		99		19		—		—		—		—		—			118
Wholesale	9		87		6		—		—		—		—		(1		)	101
Transmission and distribution	30		14		25		216		—		174		—		—			459
Interstate pipeline	—		—		—		—		236		—		—		(25		)	211
Other	—		—		1		—		—		—		—		—			1
Total Regulated	1,154		705		742		216		236		174		—		(26		)	3,201
Nonregulated	—		5		1		10		—		3		186		158			363
Total Customer Revenue	1,154		710		743		226		236		177		186		132			3,564
Other revenue	39		8		7		20		—		—		60		22			156
Total	$	1,193	$	718	$	750	$	246	$	236	$	177	$	246	$	154		$	3,720



	For the Six-Month Period Ended June 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	$	2,211	$	891	$	1,230	$	—	$	—	$	—	$	—	$	—		$	4,332
Retail gas	—		345		59		—		—		—		—		—			404
Wholesale	31		180		17		—		—		—		—		(2		)	226
Transmission and distribution	52		30		45		465		—		354		—		—			946
Interstate pipeline	—		—		—		—		610		—		—		(66		)	544
Other	—		—		1		—		—		—		—		—			1
Total Regulated	2,294		1,446		1,352		465		610		354		—		(68		)	6,453
Nonregulated	—		5		1		21		—		3		303		302			635
Total Customer Revenue	2,294		1,451		1,353		486		610		357		303		234			7,088
Other revenue	83		14		14		38		2		—		97		63			311
Total	$	2,377	$	1,465	$	1,367	$	524	$	612	$	357	$	400	$	297		$	7,399


(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 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				Six-Month Periods
	Ended June 30,				Ended June 30,
	2019		2018		2019		2018
Customer Revenue:
Brokerage	$	1,204	$	1,168	$	1,915	$	1,853
Franchise	19		19		33		34
Total Customer Revenue	1,223		1,187		1,948		1,887
Other revenue	104		86		164		147
Total	$	1,327	$	1,273	$	2,112	$	2,034

Remaining Performance Obligations



	Performance obligations expected to be satisfied:
	Less than 12 months		More than 12 months		Total
BHE Pipeline Group	$	935	$	5,411	$	6,346

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				Six-Month Periods
	Ended June 30,				Ended June 30,
	2019		2018		2019		2018
Customer Revenue:
Retail:
Residential	$	349	$	365	$	838	$	806
Commercial	373		369		733		711
Industrial	289		288		581		557
Other retail	74		73		103		98
Total retail	1,085		1,095		2,255		2,172
Wholesale	11		9		39		31
Transmission	25		30		50		52
Other Customer Revenue	22		20		38		39
Total Customer Revenue	1,143		1,154		2,382		2,294
Other revenue	24		39		44		83
Total operating revenue	$	1,167	$	1,193	$	2,426	$	2,377

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				Six-Month Periods
	Ended June 30,				Ended June 30,
	2019		2018		2019		2018
Customer Revenue:
Retail:
Residential	$	266	$	312	$	466	$	505
Commercial	114		110		204		205
Industrial	112		108		182		187
Other	6		5		11		11
Total fully bundled	498		535		863		908
Distribution only service	8		8		15		15
Total retail	506		543		878		923
Wholesale, transmission and other	14		13		31		23
Total Customer Revenue	520		556		909		946
Other revenue	7		6		13		11
Total revenue	$	527	$	562	$	922	$	957

Revenue from Contracts with Customers



	Three-Month Periods
	Ended June 30,
	2019						2018
	Electric		Gas		Total		Electric		Gas		Total
Customer Revenue:
Retail:
Residential	$	58	$	14	$	72	$	59	$	13	$	72
Commercial	54		5		59		58		4		62
Industrial	46		2		48		38		2		40
Other	1		—		1		1		—		1
Total fully bundled	159		21		180		156		19		175
Distribution only service	1		—		1		1		—		1
Total retail	160		21		181		157		19		176
Wholesale, transmission and other	11		—		11		10		—		10
Total Customer Revenue	171		21		192		167		19		186
Other revenue	1		1		2		2		—		2
Total revenue	$	172	$	22	$	194	$	169	$	19	$	188



	Six-Month Periods
	Ended June 30,
	2019						2018
	Electric		Gas		Total		Electric		Gas		Total
Customer Revenue:
Retail:
Residential	$	126	$	38	$	164	$	127	$	39	$	166
Commercial	108		15		123		115		15		130
Industrial	85		5		90		77		5		82
Other	3		—		3		3		—		3
Total fully bundled	322		58		380		322		59		381
Distribution only service	2		—		2		2		—		2
Total retail	324		58		382		324		59		383
Wholesale, transmission and other	28		—		28		23		—		23
Total Customer Revenue	352		58		410		347		59		406
Other revenue	2		1		3		3		1		4
Total revenue	$	354	$	59	$	413	$	350	$	60	$	410

Revenue from Contracts with Customers



	For the Three-Month Period Ended June 30, 2019									For the Six-Month Period Ended June 30, 2019
	Electric		Natural Gas			Other		Total		Electric		Natural Gas		Other		Total
Customer Revenue:
Retail:
Residential	$	148	$	66		$	—	$	214	$	319	$	241	$	—	$	560
Commercial	79		19			—		98		154		85		—		239
Industrial	204		3			—		207		367		9		—		376
Natural gas transportation services	—		8			—		8		—		20		—		20
Other retail⁽¹⁾	35		(1		)	—		34		70		—		—		70
Total retail	466		95			—		561		910		355		—		1,265
Wholesale	51		15			—		66		127		49		—		176
Multi-value transmission projects	14		—			—		14		30		—		—		30
Other Customer Revenue	—		—			10		10		—		—		15		15
Total Customer Revenue	531		110			10		651		1,067		404		15		1,486
Other revenue	7		1			—		8		13		2		—		15
Total operating revenue	$	538	$	111		$	10	$	659	$	1,080	$	406	$	15	$	1,501



	For the Three-Month Period Ended June 30, 2018								For the Six-Month Period Ended June 30, 2018
	Electric		Natural Gas		Other		Total		Electric		Natural Gas		Other		Total
Customer Revenue:
Retail:
Residential	$	173	$	65	$	—	$	238	$	334	$	233	$	—	$	567
Commercial	80		21		—		101		151		83		—		234
Industrial	195		5		—		200		340		10		—		350
Natural gas transportation services	—		6		—		6		—		19		—		19
Other retail⁽¹⁾	57		6		—		63		67		—		—		67
Total retail	505		103		—		608		892		345		—		1,237
Wholesale	63		23		—		86		125		55		—		180
Multi-value transmission projects	14		—		—		14		29		—		—		29
Other Customer Revenue	—		—		1		1		—		—		3		3
Total Customer Revenue	582		126		1		709		1,046		400		3		1,449
Other revenue	7		1		—		8		12		2		—		14
Total operating revenue	$	589	$	127	$	1	$	717	$	1,058	$	402	$	3	$	1,463


(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.

Accumulated Other Comprehensive Income (Loss) [Line Items]

Revenue from Contracts with Customers

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Components of Accumulated Other Comprehensive Loss, Net

6 Months Ended

Jun. 30, 2019

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 (loss) income	51			(234		)	—			1			(182		)
Balance, June 30, 2018	$	(332	)	$	(1,363	)	$	—		$	30		$	(1,665	)

Balance, December 31, 2018	$	(358	)	$	(1,623	)	$	—		$	36		$	(1,945	)
Other comprehensive (loss) income	(14		)	106			—			(35		)	57
Balance, June 30, 2019	$	(372	)	$	(1,517	)	$	—		$	1		$	(1,888	)

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Segment Information

6 Months Ended

Jun. 30, 2019

Segment Information



	Three-Month Periods				Six-Month Periods
	Ended June 30,				Ended June 30,
	2019		2018		2019		2018
Operating revenue:
PacifiCorp	$	1,167	$	1,193	$	2,426	$	2,377
MidAmerican Funding	660		718		1,502		1,465
NV Energy	721		750		1,335		1,367
Northern Powergrid	243		246		506		524
BHE Pipeline Group	212		236		583		612
BHE Transmission	175		177		343		357
BHE Renewables	249		246		416		400
HomeServices	1,327		1,273		2,112		2,034
BHE and Other⁽¹⁾	140		154		281		297
Total operating revenue	$	4,894	$	4,993	$	9,504	$	9,433



Depreciation and amortization:
PacifiCorp	$	209		$	197		$	414		$	399
MidAmerican Funding	179			208			356			366
NV Energy	120			114			240			227
Northern Powergrid	63			64			126			127
BHE Pipeline Group	29			30			57			72
BHE Transmission	60			61			118			123
BHE Renewables	69			66			139			130
HomeServices	11			11			24			23
BHE and Other⁽¹⁾	(1		)	(1		)	(2		)	(1		)
Total depreciation and amortization	$	739		$	750		$	1,472		$	1,466



	Three-Month Periods						Six-Month Periods
	Ended June 30,						Ended June 30,
	2019			2018			2019			2018
Operating income:
PacifiCorp	$	268		$	284		$	552		$	531
MidAmerican Funding	94			87			210			166
NV Energy	150			144			234			233
Northern Powergrid	110			111			239			258
BHE Pipeline Group	68			57			311			283
BHE Transmission	77			81			153			162
BHE Renewables	97			104			115			132
HomeServices	117			108			96			100
BHE and Other⁽¹⁾	(22		)	(4		)	(32		)	(22		)
Total operating income	959			972			1,878			1,843
Interest expense	(476		)	(461		)	(953		)	(927		)
Capitalized interest	17			15			33			27
Allowance for equity funds	38			24			70			45
Interest and dividend income	36			32			66			58
Gains (losses) on marketable securities, net	6			(387		)	(62		)	(596		)
Other, net	30			1			65			31
Total income before income tax expense and equity income	$	610		$	196		$	1,097		$	481



Interest expense:
PacifiCorp	$	102	$	96	$	198	$	192
MidAmerican Funding	74		61		149		124
NV Energy	56		59		118		117
Northern Powergrid	35		36		69		73
BHE Pipeline Group	12		10		24		20
BHE Transmission	39		42		78		85
BHE Renewables	44		49		88		101
HomeServices	7		6		14		10
BHE and Other⁽¹⁾	107		102		215		205
Total interest expense	$	476	$	461	$	953	$	927



Operating revenue by country:
United States	$	4,476	$	4,570	$	8,653	$	8,548
United Kingdom	242		245		505		522
Canada	175		177		343		357
Philippines and other	1		1		3		6
Total operating revenue by country	$	4,894	$	4,993	$	9,504	$	9,433



Income before income tax benefit and equity income (loss) by country:
United States	$	482	$	93	$	818	$	211
United Kingdom	76		49		179		161
Canada	39		41		79		82
Philippines and other	13		13		21		27
Total income before income tax benefit and equity income (loss) by country	$	610	$	196	$	1,097	$	481



	As of
	June 30,		December 31,
	2019		2018
Assets:
PacifiCorp	$	24,528	$	23,478
MidAmerican Funding	21,140		20,029
NV Energy	14,189		14,119
Northern Powergrid	7,587		7,427
BHE Pipeline Group	5,627		5,511
BHE Transmission	8,720		8,424
BHE Renewables	8,942		8,666
HomeServices	4,056		2,797
BHE and Other⁽¹⁾	1,353		1,738
Total assets	$	96,142	$	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 six-month period ended June 30, 2019 (in millions):



										BHE Pipeline Group
	PacifiCorp		MidAmerican Funding		NV Energy		Northern Powergrid					BHE Transmission		BHE Renewables		HomeServices
	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	—		—		—		—			—		—		—		23		23
Foreign currency translation	—		—		—		(3		)	—		60		—		—		57
June 30, 2019	$	1,129	$	2,102	$	2,369	$	949		$	73	$	1,508	$	95	$	1,450	$	9,675

Segment Information

The following tables provide information on a reportable segment basis (in millions):



	Three-Month Periods						Six-Month Periods
	Ended June 30,						Ended June 30,
	2019			2018			2019			2018
Operating revenue:
Regulated electric	$	538		$	589		$	1,080		$	1,058
Regulated natural gas	111			127			406			402
Other	10			1			15			3
Total operating revenue	$	659		$	717		$	1,501		$	1,463

Operating income:
Regulated electric	$	87		$	78		$	153		$	114
Regulated natural gas	5			8			53			51
Other	2			1			3			1
Total operating income	94			87			209			166
Interest expense	(70		)	(56		)	(139		)	(114		)
Allowance for borrowed funds	7			4			13			8
Allowance for equity funds	17			13			32			23
Other, net	10			12			30			21
Income before income tax benefit	$	58		$	60		$	145		$	104



	As of
	June 30, 2019		December 31, 2018
Assets:
Regulated electric	$	17,735	$	16,511
Regulated natural gas	1,289		1,406
Other	3		3
Total assets	$	19,027	$	17,920

Segment Information

The following tables provide information on a reportable segment basis (in millions):



	Three-Month Periods						Six-Month Periods
	Ended June 30,						Ended June 30,
	2019			2018			2019			2018
Operating revenue:
Regulated electric	$	538		$	589		$	1,080		$	1,058
Regulated natural gas	111			127			406			402
Other	11			2			16			5
Total operating revenue	$	660		$	718		$	1,502		$	1,465

Operating income:
Regulated electric	$	87		$	78		$	153		$	114
Regulated natural gas	5			8			53			51
Other	2			1			4			1
Total operating income	94			87			210			166
Interest expense	(74		)	(61		)	(149		)	(124		)
Allowance for borrowed funds	7			4			13			8
Allowance for equity funds	17			13			32			23
Other, net	10			13			31			23
Income before income tax benefit	$	54		$	56		$	137		$	96



	As of
	June 30, 2019		December 31, 2018
Assets⁽¹⁾:
Regulated electric	$	18,926	$	17,702
Regulated natural gas	1,368		1,485
Other	19		15
Total assets	$	20,313	$	19,202



(1)	Assets by reportable segment reflect the assignment of goodwill to applicable reporting units.

Investments and Restricted Cash and Investments [Abstract]



	As of
	June 30,		December 31,
	2019		2018
Assets:
Regulated electric	$	3,237	$	3,177
Regulated natural gas	316		314
Regulated common assets⁽¹⁾	41		78
Total assets	$	3,594	$	3,569


(1)	Consists principally of cash and cash equivalents not included in either the regulated electric or regulated natural gas segments.

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Related Party Transactions Related Party Transactions (Notes)	6 Months Ended
	Jun. 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 six-month periods ended June 30, 2019 and 2018, PacifiCorp made net cash payments for federal and state income tax to BHE totaling $11 million and $32 million, respectively.

XML 95 R51.htm IDEA: XBRL DOCUMENT

BHE Shareholders' Equity (Notes)	6 Months Ended
BHE Shareholders' Equity (Notes)	Jun. 30, 2019
Equity [Abstract]
Stockholders' Equity Note Disclosure [Text Block]	BHE Shareholders' Equity For the six-month periods ended June 30, 2019 and 2018, BHE repurchased 447,712 shares of its common stock for $293 million and 149,281 shares of its common stock for $90 million, respectively.

XML 96 R52.htm IDEA: XBRL DOCUMENT

Cash and Cash Equivalents and Restricted Cash and Cash Equivalents Supplemental Cash Flow Disclosure (Policies)	6 Months Ended
	Jun. 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 June 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 June 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.

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Investments and Restricted Cash and Investments (Tables)

6 Months Ended

Jun. 30, 2019

Investments and Restricted Cash and Investments

Investments and restricted cash and cash equivalents and investments consists of the following (in millions):



	As of
	June 30,		December 31,
	2019		2018
Investments:
BYD Company Limited common stock	$	1,358	$	1,435
Rabbi trusts	392		371
Other	181		168
Total investments	1,931		1,974

Equity method investments:
BHE Renewables tax equity investments	1,797		1,661
Electric Transmission Texas, LLC	537		527
Bridger Coal Company	89		99
Other	172		153
Total equity method investments	2,595		2,440

Restricted cash and cash equivalents and investments:
Quad Cities Station nuclear decommissioning trust funds	562		504
Restricted cash and cash equivalents	241		256
Total restricted cash and cash equivalents and investments	803		760

Total investments and restricted cash and cash equivalents and investments	$	5,329	$	5,174

Reflected as:
Current assets	$	237	$	271
Noncurrent assets	5,092		4,903
Total investments and restricted cash and cash equivalents and investments	$	5,329	$	5,174

Unrealized Gain (Loss) on Investments [Table Text Block]

Gains (losses) on marketable securities, net recognized during the period consists of the following (in millions):



	Three-Month Periods						Six-Month Periods
	Ended June 30,						Ended June 30,
	2019			2018			2019			2018
Unrealized gains (losses) recognized on marketable securities still held at the reporting date	$	7		$	(386	)	$	(61	)	$	(597	)
Net (losses) gains recognized on marketable securities sold during the period	(1		)	(1		)	(1		)	1
Gains (losses) on marketable securities, net	$	6		$	(387	)	$	(62	)	$	(596	)

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Property, Plant and Equipment, Net (Tables)

6 Months Ended

Jun. 30, 2019

Property, Plant and Equipment [Table Text Block]

Property, plant and equipment, net consists of the following (in millions):



		As of
	Depreciable	June 30,			December 31,
	Life	2019			2018
Regulated assets:
Utility generation, transmission and distribution systems	5-80 years	$	78,087		$	76,707
Interstate natural gas pipeline assets	3-80 years	7,571			7,524
		85,658			84,231
Accumulated depreciation and amortization		(26,637		)	(25,894		)
Regulated assets, net		59,021			58,337

Nonregulated assets:
Independent power plants	5-30 years	6,962			6,826
Other assets	3-30 years	1,625			1,424
		8,587			8,250
Accumulated depreciation and amortization		(2,000		)	(1,610		)
Nonregulated assets, net		6,587			6,640

Net operating assets		65,608			64,977
Construction work-in-progress		4,331			3,110
Property, plant and equipment, net		$	69,939		$	68,087

Property, plant and equipment, net consists of the following (in millions):



		As of
		June 30,			December 31,
	Depreciable Life	2019			2018
Utility plant in service, net:
Generation	20-70 years	$	14,124		$	13,727
Transmission	52-75 years	1,974			1,934
Electric distribution	20-75 years	3,786			3,672
Natural gas distribution	29-75 years	1,750			1,724
Utility plant in service		21,634			21,057
Accumulated depreciation and amortization		(6,201		)	(5,941		)
Utility plant in service, net		15,433			15,116
Nonregulated property, net:
Nonregulated property gross	20-50 years	7			7
Accumulated depreciation and amortization		(1		)	(1		)
Nonregulated property, net		6			6
		15,439			15,122
Construction work-in-progress		1,513			1,035
Property, plant and equipment, net		$	16,952		$	16,157



		As of
		June 30,			December 31,
	Depreciable Life	2019			2018
Utility Plant:
Generation	14 - 67 years	$	12,588		$	12,606
Transmission	58 - 75 years	6,451			6,357
Distribution	20 - 70 years	7,150			7,030
Intangible plant⁽¹⁾	5 - 75 years	974			970
Other	5 - 60 years	1,425			1,436
Utility plant in service		28,588			28,399
Accumulated depreciation and amortization		(10,234		)	(10,034		)
Utility plant in-service, net		18,354			18,365
Other non-regulated, net of accumulated depreciation and amortization	47 years	10			10
Plant, net		18,364			18,375
Construction work-in-progress		1,792			1,195
Property, plant and equipment, net		$	20,156		$	19,570


(1)	Computer software costs included in intangible plant are initially assigned a depreciable life of 5 to 10 years.

Property, plant and equipment, net consists of the following (in millions):



		As of
	Depreciable Life	June 30,			December 31,
	Depreciable Life	2019			2018
Utility plant:
Generation	30 - 55 years	$	3,724		$	3,720
Distribution	20 - 65 years	3,472			3,411
Transmission	45 - 70 years	1,446			1,439
General and intangible plant	5 - 65 years	709			716
Utility plant		9,351			9,286
Accumulated depreciation and amortization		(3,027		)	(2,966		)
Utility plant, net		6,324			6,320
Other non-regulated, net of accumulated depreciation and amortization	45 years	1			1
Plant, net		6,325			6,321
Construction work-in-progress		132			97
Property, plant and equipment, net		$	6,457		$	6,418

Condensed Cash Flow Statements, Captions [Line Items]

Property, plant and equipment, net consists of the following (in millions):



		As of
	Depreciable Life	June 30,			December 31,
	Depreciable Life	2019			2018
Utility plant:
Electric generation	25 - 60 years	$	1,134		$	1,132
Electric distribution	20 - 100 years	1,631			1,568
Electric transmission	50 - 100 years	828			812
Electric general and intangible plant	5 - 70 years	177			185
Natural gas distribution	35 - 70 years	408			403
Natural gas general and intangible plant	5 - 70 years	14			14
Common general	5 - 70 years	318			321
Utility plant		4,510			4,435
Accumulated depreciation and amortization		(1,604		)	(1,583		)
Utility plant, net		2,906			2,852
Other non-regulated, net of accumulated depreciation and amortization	70 years	5			5
Plant, net		2,911			2,857
Construction work-in-progress		81			90
Property, plant and equipment, net		$	2,992		$	2,947

XML 99 R55.htm IDEA: XBRL DOCUMENT

Cash and Cash Equivalents and Restricted Cash and Cash Equivalents Supplemental Cash Flow Disclosure (Tables)

6 Months Ended

Jun. 30, 2019

Schedule of Cash Flow, Supplemental Disclosures [Table Text Block]

Cash and Cash Equivalents and Restricted Cash and Cash Equivalents



	As of
	June 30,		December 31,
	2019		2018
Cash and cash equivalents	$	1,265	$	627
Restricted cash and cash equivalents	214		227
Investments and restricted cash and cash equivalents and investments	27		29
Total cash and cash equivalents and restricted cash and cash equivalents	$	1,506	$	883

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 June 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
	June 30,		December 31,
	2019		2018
Cash and cash equivalents	$	28	$	71
Restricted cash and cash equivalents included in other current assets	5		5
Total cash and cash equivalents and restricted cash and cash equivalents	$	33	$	76

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 June 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
	June 30,		December 31,
	2019		2018
Cash and cash equivalents	$	81	$	111
Restricted cash and cash equivalents included in other current assets	9		10
Total cash and cash equivalents and restricted cash and cash equivalents	$	90	$	121

Condensed Cash Flow Statements, Captions [Line Items]

Schedule of Cash Flow, Supplemental Disclosures [Table Text Block]



	As of
	June 30,		December 31,
	2019		2018
Cash and cash equivalents	$	536	$	77
Restricted cash included in other current assets	16		13
Restricted cash included in other assets	2		2
Total cash and cash equivalents and restricted cash and cash equivalents	$	554	$	92

Condensed Cash Flow Statements, Captions [Line Items]

Schedule of Cash Flow, Supplemental Disclosures [Table Text Block]



	As of
	June 30		December 31
	2019		2018

Cash and cash equivalents	$	186	$	1
Restricted cash and cash equivalents in other current assets	46		56
Total cash and cash equivalents and restricted cash and cash equivalents	$	232	$	57

Condensed Cash Flow Statements, Captions [Line Items]

Schedule of Cash Flow, Supplemental Disclosures [Table Text Block]



	As of
	June 30,		December 31
	2019		2018

Cash and cash equivalents	$	185	$	—
Restricted cash and cash equivalents in other current assets	46		56
Total cash and cash equivalents and restricted cash and cash equivalents	$	231	$	56

XML 100 R56.htm IDEA: XBRL DOCUMENT

Leases Leases (Tables)

6 Months Ended

Jun. 30, 2019

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
	June 30,
	2019
Right-of-use assets:
Operating leases	$	553
Finance leases	509
Total right-of-use assets	$	1,062

Lease liabilities:
Operating leases	$	597
Finance leases	523
Total lease liabilities	$	1,120

Operating and Finance Lease, Supplemental Cash Flow [Table Text Block]

The following table summarizes the Company's lease costs (in millions):



	Three-Month Period		Six-Month Period
	Ended June 30,		Ending June 30,
	2019		2019

Variable	$	153	$	296
Operating	41		82
Finance:
Amortization	4		8
Interest	10		21
Short-term	1		3
Total lease costs	$	209	$	410

Weighted-average remaining lease term (years):
Operating leases			8.0
Finance leases			29.1

Weighted-average discount rate:
Operating leases			5.2		%
Finance leases			8.7		%

The following table summarizes the Company's supplemental cash flow information relating to leases (in millions):



	Six-Month Period
	Ended June 30,
	2019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$	(70	)
Operating cash flows from finance leases	(22		)
Financing cash flows from finance leases	(9		)
Right-of-use assets obtained in exchange for lease liabilities:
Operating leases	$	49
Finance leases	6

Operating and Finance Lease, Liability, Maturity [Table Text Block]

The Company has the following remaining lease commitments as of (in millions):



	June 30, 2019									December 31, 2018⁽¹⁾
	Operating			Finance			Total			Operating		Capital		Total
2019	$	77		$	39		$	116		$	147	$	69	$	216
2020	139			69			208			128		68		196
2021	117			75			192			110		73		183
2022	93			68			161			87		67		154
2023	66			57			123			61		56		117
Thereafter	236			776			1,012			159		772		931
Total undiscounted lease payments	728			1,084			1,812			$	692	$	1,105	$	1,797
Less - amounts representing interest	(131		)	(561		)	(692		)
Lease liabilities	$	597		$	523		$	1,120

(1) Amounts included for comparability and accounted for in accordance with ASC 840, "Leases".

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
	June 30,
	2019
Right-of-use assets:
Operating leases	$	14
Finance leases	20
Total right-of-use assets	$	34

Lease liabilities:
Operating leases	$	14
Finance leases	20
Total lease liabilities	$	34

Operating and Finance Lease, Liability, Maturity [Table Text Block]

The following table summarizes PacifiCorp's lease costs (in millions):



	Three-Month Period		Six-Month Period
	Ended June 30,		Ended June 30,
	2019		2019

Variable	$	16	$	26
Operating	1		1
Finance:
Amortization	—		1
Interest	1		1
Short-term	1		1
Total lease costs	$	19	$	30

Weighted-average remaining lease term (years):
Operating leases			13.6
Finance leases			9.5

Weighted-average discount rate:
Operating leases			3.7		%
Finance leases			10.6		%

PacifiCorp has the following remaining lease commitments as of (in millions):



	June 30, 2019									December 31, 2018⁽¹⁾
	Operating			Finance			Total			Operating		Capital		Total
2019	$	2		$	2		$	4		$	3	$	4	$	7
2020	2			3			5			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	8			16			24			7		16		23
Total undiscounted lease payments	18			33			51			$	20	$	36	$	56
Less - amounts representing interest	(4		)	(13		)	(17		)
Lease liabilities	$	14		$	20		$	34

(1) Amounts included for comparability and accounted for in accordance with ASC 840, "Leases".

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
	June 30,
	2019
Right-of-use assets:
Operating leases	$	14
Finance leases	449
Total right-of-use assets	$	463

Lease liabilities:
Operating leases	$	18
Finance leases	462
Total lease liabilities	$	480

Operating and Finance Lease, Supplemental Cash Flow [Table Text Block]

The following table summarizes Nevada Power's lease costs (in millions):



	Three-Month Period		Six-Month Period
	Ended June 30,		Ended June 30,
	2019		2019

Variable	$	112	$	220
Operating	—		1
Finance:
Amortization	3		6
Interest	10		20
Total lease costs	$	125	$	247

Weighted-average remaining lease term (years):
Operating leases			7.7
Finance leases			30.8

Weighted-average discount rate:
Operating leases			4.4		%
Finance leases			8.6		%

The following table summarizes Nevada Power's supplemental cash flow information relating to leases (in millions):



	Six-Month Period
	Ended June 30,
	2019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$	(1	)
Operating cash flows from finance leases	(20		)
Financing cash flows from finance leases	(7		)
Right-of-use assets obtained in exchange for lease liabilities:
Finance leases	$	4

Operating and Finance Lease, Liability, Maturity [Table Text Block]

Nevada Power has the following remaining lease commitments as of (in millions):



	June 30, 2019									December 31, 2018⁽¹⁾
	Operating			Finance			Total			Operating		Capital		Total
2019	$	1		$	34		$	35		$	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			50			52			2		50		52
Thereafter	10			712			722			10		709		719
Total undiscounted lease payments	21			979			1,000			$	24	$	998	$	1,022
Less - amounts representing interest	(3		)	(517		)	(520		)
Lease liabilities	$	18		$	462		$	480

(1) Amounts included for comparability and accounted for in accordance with ASC Topic 840, "Leases".

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
	June 30,
	2019
Right-of-use assets:
Operating leases	$	19
Finance leases	39
Total right-of-use assets	$	58

Lease liabilities:
Operating leases	$	19
Finance leases	40
Total lease liabilities	$	59

Operating and Finance Lease, Supplemental Cash Flow [Table Text Block]

The following table summarizes Sierra Pacific's lease costs (in millions):



	Three-Month Period		Six-Month Period
	Ended June 30,		Ended June 30,
	2019		2019

Variable	$	15	$	30
Operating	1		1
Finance:
Amortization	—		1
Interest	—		1
Total lease costs	$	16	$	33

Weighted-average remaining lease term (years):
Operating leases			26.0
Finance leases			23.0

Weighted-average discount rate:
Operating leases			4.9		%
Finance leases			7.0		%

The following table summarizes Sierra Pacific's supplemental cash flow information relating to leases (in millions):



	Six-Month Period
	Ended June 30,
	2019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$	(1	)
Operating cash flows from finance leases	(1		)
Financing cash flows from finance leases	(1		)
Right-of-use assets obtained in exchange for lease liabilities:
Finance leases	$	2

Operating and Finance Lease, Liability, Maturity [Table Text Block]

Sierra Pacific has the following remaining lease commitments as of (in millions):



	June 30, 2019									December 31, 2018⁽¹⁾
	Operating			Finance			Total			Operating		Capital		Total
2019	$	2		$	3		$	5		$	2	$	6	$	8
2020	2			5			7			2		4		6
2021	2			5			7			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	35			71			106			$	36	$	70	$	106
Less - amounts representing interest	(16		)	(31		)	(47		)
Lease liabilities	$	19		$	40		$	59

(1) Amounts included for comparability and accounted for in accordance with ASC Topic 840, "Leases".

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Income Taxes (Tables)

6 Months Ended

Jun. 30, 2019

Schedule of Effective Income Tax Rate Reconciliation [Line Items]

Schedule of Effective Income Tax Rate Reconciliation

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				Six-Month Periods
	Ended June 30,				Ended June 30,
	2019		2018		2019		2018

Federal statutory income tax rate	21	%	21	%	21	%	21	%
Income tax credits	(29	)	(78	)	(29	)	(58	)
State income tax, net of federal income tax benefit	—		(19	)	(8	)	(25	)
Income tax effect of foreign income	(1	)	(4	)	(2	)	(11	)
Effects of ratemaking	(2	)	(8	)	(2	)	(8	)
Equity income	—		1		—		1
Other, net	(1	)	1		—		(1	)
Effective income tax rate	(12	)%	(86	)%	(20	)%	(81	)%

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				Six-Month Periods
	Ended June 30,				Ended June 30,
	2019		2018		2019		2018

Federal statutory income tax rate	21	%	21	%	21	%	21	%
Income tax credits	(29	)	(78	)	(29	)	(58	)
State income tax, net of federal income tax benefit	—		(19	)	(8	)	(25	)
Income tax effect of foreign income	(1	)	(4	)	(2	)	(11	)
Effects of ratemaking	(2	)	(8	)	(2	)	(8	)
Equity income	—		1		—		1
Other, net	(1	)	1		—		(1	)
Effective income tax rate	(12	)%	(86	)%	(20	)%	(81	)%

Schedule of Effective Income Tax Rate Reconciliation [Line Items]

Schedule of Effective Income Tax Rate Reconciliation

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				Six-Month Periods
	Ended June 30,				Ended June 30,
	2019		2018		2019		2018

Federal statutory income tax rate	21	%	21	%	21	%	21	%
Nondeductible expenses	—		2		—		2
Effects of ratemaking	—		(1	)	—		(1	)
Other	—		1		—		1
Effective income tax rate	21	%	23	%	21	%	23	%

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				Six-Month Periods
	Ended June 30,				Ended June 30,
	2019		2018		2019		2018

Federal statutory income tax rate	21	%	21	%	21	%	21	%
Nondeductible expenses	—		2		—		2
Effects of ratemaking	—		(1	)	—		(1	)
Other	—		1		—		1
Effective income tax rate	21	%	23	%	21	%	23	%

Schedule of Effective Income Tax Rate Reconciliation [Line Items]

Schedule of Effective Income Tax Rate Reconciliation

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				Six-Month Periods
	Ended June 30,				Ended June 30,
	2019		2018		2019		2018

Federal statutory income tax rate	21	%	21	%	21	%	21	%
Nondeductible expenses	—		8		—		3
Effects of ratemaking	1		14		1		(1	)
Other	—		3		—		—
Effective income tax rate	22	%	46	%	22	%	23	%

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				Six-Month Periods
	Ended June 30,				Ended June 30,
	2019		2018		2019		2018

Federal statutory income tax rate	21	%	21	%	21	%	21	%
Nondeductible expenses	—		8		—		3
Effects of ratemaking	1		14		1		(1	)
Other	—		3		—		—
Effective income tax rate	22	%	46	%	22	%	23	%

Schedule of Effective Income Tax Rate Reconciliation [Line Items]

Schedule of Effective Income Tax Rate Reconciliation


	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				Six-Month Periods
	Ended June 30,				Ended June 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	(4	)	(5	)	(4	)	(5	)
Effects of ratemaking	(1	)	(4	)	(1	)	(4	)
Other	(1	)	(3	)	—		(2	)
Effective income tax rate	18	%	13	%	19	%	14	%

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				Six-Month Periods
	Ended June 30,				Ended June 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	(4	)	(5	)	(4	)	(5	)
Effects of ratemaking	(1	)	(4	)	(1	)	(4	)
Other	(1	)	(3	)	—		(2	)
Effective income tax rate	18	%	13	%	19	%	14	%

Schedule of Effective Income Tax Rate Reconciliation [Line Items]

Schedule of Effective Income Tax Rate Reconciliation

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				Six-Month Periods
	Ended June 30,				Ended June 30,
	2019		2018		2019		2018

Federal statutory income tax rate	21	%	21	%	21	%	21	%
Income tax credits	(158	)	(80	)	(131	)	(104	)
State income tax, net of federal income tax benefit	(22	)	(7	)	(21	)	(8	)
Effects of ratemaking	(10	)	(9	)	(9	)	(13	)
Other, net	—		(2	)	(1	)	—
Effective income tax rate	(169	)%	(77	)%	(141	)%	(104	)%

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				Six-Month Periods
	Ended June 30,				Ended June 30,
	2019		2018		2019		2018

Federal statutory income tax rate	21	%	21	%	21	%	21	%
Income tax credits	(158	)	(80	)	(131	)	(104	)
State income tax, net of federal income tax benefit	(22	)	(7	)	(21	)	(8	)
Effects of ratemaking	(10	)	(9	)	(9	)	(13	)
Other, net	—		(2	)	(1	)	—
Effective income tax rate	(169	)%	(77	)%	(141	)%	(104	)%

Schedule of Effective Income Tax Rate Reconciliation [Line Items]

Schedule of Effective Income Tax Rate Reconciliation

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				Six-Month Periods
	Ended June 30,				Ended June 30,
	2019		2018		2019		2018

Federal statutory income tax rate	21	%	21	%	21	%	21	%
Income tax credits	(171	)	(86	)	(139	)	(113	)
State income tax, net of federal income tax benefit	(25	)	(8	)	(23	)	(9	)
Effects of ratemaking	(11	)	(10	)	(9	)	(14	)
Other, net	3		(1	)	—		—
Effective income tax rate	(183	)%	(84	)%	(150	)%	(115	)%

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 six-month periods ended June 30, 2019 and 2018 were $190 million and $108 million, respectively with $56 million of the difference related to the change in the method of interim 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 made net cash payments for income tax to BHE totaling $8 million for the six-month period ended June 30, 2019, and received net cash payments for income tax from BHE totaling $234 million for the six-month period ended June 30, 2018.

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				Six-Month Periods
	Ended June 30,				Ended June 30,
	2019		2018		2019		2018

Federal statutory income tax rate	21	%	21	%	21	%	21	%
Income tax credits	(171	)	(86	)	(139	)	(113	)
State income tax, net of federal income tax benefit	(25	)	(8	)	(23	)	(9	)
Effects of ratemaking	(11	)	(10	)	(9	)	(14	)
Other, net	3		(1	)	—		—
Effective income tax rate	(183	)%	(84	)%	(150	)%	(115	)%

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Employee Benefit Plans (Tables)

6 Months Ended

Jun. 30, 2019

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						Six-Month Periods
	Ended June 30,						Ended June 30,
	2019			2018			2019			2018
Pension:
Service cost	$	4		$	5		$	8		$	10
Interest cost	28			26			55			52
Expected return on plan assets	(39		)	(41		)	(77		)	(82		)
Net amortization	7			7			16			15
Net periodic benefit cost (credit)	$	—		$	(3	)	$	2		$	(5	)

Other postretirement:
Service cost	$	3		$	3		$	5		$	5
Interest cost	8			6			14			12
Expected return on plan assets	(10		)	(12		)	(20		)	(22		)
Net amortization	(1		)	(3		)	(3		)	(6		)
Net periodic benefit credit	$	—		$	(6	)	$	(4	)	$	(11	)

Foreign Operations

Net periodic benefit cost for the United Kingdom pension plan included the following components (in millions):



	Three-Month Periods						Six-Month Periods
	Ended June 30,						Ended June 30,
	2019			2018			2019			2018

Service cost	$	4		$	5		$	8		$	10
Interest cost	13			14			26			28
Expected return on plan assets	(25		)	(26		)	(50		)	(53		)
Settlement	—			24			—			24
Net amortization	9			14			18			29
Net periodic benefit cost	$	1		$	31		$	2		$	38

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						Six-Month Periods
	Ended June 30,						Ended June 30,
	2019			2018			2019		2018
Pension:
Service cost	$	—		$	—		—		—
Interest cost	11			10			22		21
Expected return on plan assets	(16		)	(18		)	(33	)	(36	)
Net amortization	3			4			6		7
Net periodic benefit credit	$	(2	)	$	(4	)	(5	)	(8	)

Other postretirement:
Service cost	$	1		$	1		1		1
Interest cost	3			3			6		6
Expected return on plan assets	(5		)	(6		)	(10	)	(11	)
Net amortization	—			(2		)	—		(3	)
Net periodic benefit credit	$	(1	)	$	(4	)	(3	)	(7	)

Schedule of Defined Benefit Plans Disclosures

Net periodic benefit (credit) cost for the plans of MidAmerican Energy and the aforementioned affiliates included the following components (in millions):



	Three-Month Periods						Six-Month Periods
	Ended June 30,						Ended June 30,
	2019			2018			2019			2018
Pension:
Service cost	$	1		$	2		$	3		$	4
Interest cost	8			7			15			14
Expected return on plan assets	(11		)	(11		)	(21		)	(22		)
Net amortization	—			—			—			1
Net periodic benefit credit	$	(2	)	$	(2	)	$	(3	)	$	(3	)

Other postretirement:
Service cost	$	2		$	2		$	3		$	3
Interest cost	3			2			5			4
Expected return on plan assets	(3		)	(4		)	(6		)	(7		)
Net amortization	(1		)	(1		)	(2		)	(2		)
Net periodic benefit cost (credit)	$	1		$	(1	)	$	—		$	(2	)

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
	June 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

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
	June 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

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Asset Retirement Obligation Asset Retirement Obligations (Tables)

6 Months Ended

Jun. 30, 2019

Asset Retirement Obligations Disclosure [Line Items]

Schedule of Change in Asset Retirement Obligation [Table Text Block]

Asset Retirement Obligations

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 six-month period ended June 30, 2019 (in millions):



Beginning balance	$	562
Change in estimated costs	237
Retirements	(1		)
Accretion	14
Ending balance	$	812

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Risk Management and Hedging Activities (Tables) - PacifiCorp [Member]

6 Months Ended

Jun. 30, 2019

Derivative [Line Items]

Schedule of Derivative Instruments in Statement of Financial Position, Fair Value



	Other						Other			Other
	Current			Other			Current			Long-term
	Assets			Assets			Liabilities			Liabilities			Total

As of June 30, 2019
Not designated as hedging contracts⁽¹⁾:
Commodity assets	$	13		$	5		$	9		$	—		$	27
Commodity liabilities	(6		)	(1		)	(63		)	(59		)	(129		)
Total	7			4			(54		)	(59		)	(102		)

Total derivatives	7			4			(54		)	(59		)	(102		)
Cash collateral (payable) receivable	(1		)	—			19			37			55
Total derivatives - net basis	$	6		$	4		$	(35	)	$	(22	)	$	(47	)

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 June 30, 2019 and December 31, 2018, a regulatory asset of $101 million and $96 million, respectively, was recorded related to the net derivative liability of $102 million and $97 million, respectively.

Schedule of Regulatory Assets (Liabilities), Net, Unrealized Loss (Gain), Net, on Derivative Contracts



	Three-Month Periods						Six-Month Periods
	Ended June 30,						Ended June 30,
	2019			2018			2019			2018

Beginning balance	$	78		$	122		$	96		$	101
Changes in fair value	26			6			(28		)	34
Net gains (losses) reclassified to operating revenue	6			(1		)	(16		)	6
Net (losses) gains reclassified to cost of fuel and energy	(9		)	(11		)	49			(25		)
Ending balance	$	101		$	116		$	101		$	116

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	June 30,		December 31,
	Measure	2019		2018

Electricity sales, net	Megawatt hours	(2	)	(6	)
Natural gas purchases	Decatherms	116		117

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Fair Value Measurements (Tables)

6 Months Ended

Jun. 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 June 30, 2019
Assets:
Commodity derivatives	$	—		$	38		$	106		$	(25	)	$	119
Interest rate derivatives	—			6			25			—			31
Mortgage loans held for sale	—			1,065			—			—			1,065
Money market mutual funds⁽²⁾	951			—			—			—			951
Debt securities:
United States government obligations	193			—			—			—			193
International government obligations	—			4			—			—			4
Corporate obligations	—			49			—			—			49
Municipal obligations	—			2			—			—			2
Agency, asset and mortgage-backed obligations	—			1			—			—			1
Equity securities:
United States companies	311			—			—			—			311
International companies	1,358			—			—			—			1,358
Investment funds	182			—			—			—			182
	$	2,995		$	1,165		$	131		$	(25	)	$	4,266
Liabilities:
Commodity derivatives	$	(2	)	$	(187	)	$	(20	)	$	117		$	(92	)
Interest rate derivatives	(2		)	(24		)	(2		)	—			(28		)
	$	(4	)	$	(211	)	$	(22	)	$	117		$	(120	)



	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 $92 million and $59 million as of June 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						Six-Month Periods
	Ended June 30,						Ended June 30,
				Interest						Interest
	Commodity			Rate			Commodity			Rate
	Derivatives			Derivatives			Derivatives			Derivatives
2019:
Beginning balance	$	86		$	18		$	99		$	10
Changes included in earnings	8			94			5			147
Changes in fair value recognized in OCI	(1		)	—			(1		)	—
Changes in fair value recognized in net regulatory assets	(12		)	—			(23		)	—
Purchases	3			—			4			—
Settlements	2			(89		)	2			(134		)
Ending balance	$	86		$	23		$	86		$	23



2018:
Beginning balance	$	81		$	16		$	94		$	9
Changes included in earnings	4			56			4			86
Changes in fair value recognized in OCI	1			—			—			—
Changes in fair value recognized in net regulatory assets	(5		)	—			(14		)	—
Purchases	—			—			1			—
Settlements	2			(55		)	(2		)	(78		)
Ending balance	$	83		$	17		$	83		$	17

The following table presents the carrying value and estimated fair value of the Company's long-term debt (in millions):



	As of June 30, 2019				As of December 31, 2018
	Carrying		Fair		Carrying		Fair
	Value		Value		Value		Value

Long-term debt	$	38,096	$	43,822	$	36,250	$	38,874

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 June 30, 2019
Assets:
Money market mutual funds⁽¹⁾	$	71	$	—	$	—		$	71
Investment funds	2		—		—			2
	$	73	$	—	$	—		$	73

Liabilities - commodity derivatives	$	—	$	—	$	(11	)	$	(11	)

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



	Three-Month Periods						Six-Month Periods
	Ended June 30,						Ended June 30,
	2019			2018			2019			2018

Beginning balance	$	(5	)	$	(8	)	$	3		$	(3	)
Changes in fair value recognized in regulatory assets	(8		)	(3		)	(17		)	(8		)
Settlements	2			2			3			2
Ending balance	$	(11	)	$	(9	)	$	(11	)	$	(9	)

The following table presents the carrying value and estimated fair value of Nevada Power's long‑term debt (in millions):



	As of June 30, 2019				As of December 31, 2018
	Carrying		Fair		Carrying		Fair
	Value		Value		Value		Value

Long-term debt	$	2,350	$	2,787	$	2,353	$	2,651

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 June 30, 2019
Assets:
Commodity derivatives	$	—	$	27		$	—	$	(17	)	$	10
Money market mutual funds⁽²⁾	442		—			—		—			442
Investment funds	25		—			—		—			25
	$	467	$	27		$	—	$	(17	)	$	477

Liabilities - Commodity derivatives	$	—	$	(129	)	$	—	$	72		$	(57	)

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 $55 million and $59 million as of June 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.



	As of June 30, 2019				As of December 31, 2018
	Carrying		Fair		Carrying		Fair
	Value		Value		Value		Value

Long-term debt	$	7,656	$	9,141	$	7,015	$	7,833

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 June 30, 2019:
Assets:
Commodity derivatives	$	—	$	1		$	1		$	(1	)	$	1
Money market mutual funds⁽²⁾	165		—			—			—			165
Debt securities:
United States government obligations	193		—			—			—			193
International government obligations	—		4			—			—			4
Corporate obligations	—		49			—			—			49
Municipal obligations	—		2			—			—			2
Agency, asset and mortgage-backed obligations	—		1			—			—			1
Equity securities:
United States companies	311		—			—			—			311
Investment funds	19		—			—			—			19
	$	688	$	57		$	1		$	(1	)	$	745

Liabilities - commodity derivatives	$	—	$	(5	)	$	(2	)	$	1		$	(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 $- million as of June 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.



	As of June 30, 2019				As of December 31, 2018
	Carrying Value		Fair Value		Carrying Value		Fair Value

Long-term debt	$	6,341	$	7,213	$	5,379	$	5,644

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

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 June 30, 2019				As of December 31, 2018
	Carrying Value		Fair Value		Carrying Value		Fair Value

Long-term debt	$	6,581	$	7,528	$	5,619	$	5,941

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 June 30, 2019
Assets:
Commodity derivatives	$	—	$	—	$	1		$	1
Money market mutual funds⁽¹⁾	25		—		—			25
	$	25	$	—	$	1		$	26

Liabilities - commodity derivatives	$	—	$	—	$	(3	)	$	(3	)

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.

The following table presents the carrying value and estimated fair value of Sierra Pacific's long-term debt (in millions):



	As of June 30, 2019				As of December 31, 2018
	Carrying		Fair		Carrying		Fair
	Value		Value		Value		Value

Long-term debt	$	1,135	$	1,240	$	1,120	$	1,167

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Revenue from Contracts with Customers Revenue from Contracts with Customers (Tables)

6 Months Ended

Jun. 30, 2019

Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table Text Block]

Energy Products and Services



	For the Three-Month Period Ended June 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	$	1,107	$	467	$	658	$	—	$	—	$	—	$	—	$	—		$	2,232
Retail gas	—		95		21		—		—		—		—		—			116
Wholesale	11		66		10		—		—		—		—		(1		)	86
Transmission and distribution	25		15		24		209		—		168		—		—			441
Interstate pipeline	—		—		—		—		212		—		—		(24		)	188
Other	—		—		—		—		—		—		—		—			—
Total Regulated	1,143		643		713		209		212		168		—		(25		)	3,063
Nonregulated	—		10		—		10		—		7		197		142			366
Total Customer Revenue	1,143		653		713		219		212		175		197		117			3,429
Other revenue	24		7		8		24		—		—		52		23			138
Total	$	1,167	$	660	$	721	$	243	$	212	$	175	$	249	$	140		$	3,567



	For the Six-Month Period Ended June 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	$	2,293	$	910	$	1,185	$	—	$	—		$	—	$	—	$	—		$	4,388
Retail gas	—		355		58		—		—			—		—		—			413
Wholesale	39		176		28		—		—			—		—		(1		)	242
Transmission and distribution	50		31		48		439		—			335		—		—			903
Interstate pipeline	—		—		—		—		584			—		—		(61		)	523
Other	—		—		1		—		—			—		—		—			1
Total Regulated	2,382		1,472		1,320		439		584			335		—		(62		)	6,470
Nonregulated	—		16		—		18		—			8		323		281			646
Total Customer Revenue	2,382		1,488		1,320		457		584			343		323		219			7,116
Other revenue⁽²⁾	44		14		15		49		(1		)	—		93		62			276
Total	$	2,426	$	1,502	$	1,335	$	506	$	583		$	343	$	416	$	281		$	7,392



	For the Three-Month Period Ended June 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	$	1,115	$	505	$	691	$	—	$	—	$	—	$	—	$	—		$	2,311
Retail gas	—		99		19		—		—		—		—		—			118
Wholesale	9		87		6		—		—		—		—		(1		)	101
Transmission and distribution	30		14		25		216		—		174		—		—			459
Interstate pipeline	—		—		—		—		236		—		—		(25		)	211
Other	—		—		1		—		—		—		—		—			1
Total Regulated	1,154		705		742		216		236		174		—		(26		)	3,201
Nonregulated	—		5		1		10		—		3		186		158			363
Total Customer Revenue	1,154		710		743		226		236		177		186		132			3,564
Other revenue	39		8		7		20		—		—		60		22			156
Total	$	1,193	$	718	$	750	$	246	$	236	$	177	$	246	$	154		$	3,720



	For the Six-Month Period Ended June 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	$	2,211	$	891	$	1,230	$	—	$	—	$	—	$	—	$	—		$	4,332
Retail gas	—		345		59		—		—		—		—		—			404
Wholesale	31		180		17		—		—		—		—		(2		)	226
Transmission and distribution	52		30		45		465		—		354		—		—			946
Interstate pipeline	—		—		—		—		610		—		—		(66		)	544
Other	—		—		1		—		—		—		—		—			1
Total Regulated	2,294		1,446		1,352		465		610		354		—		(68		)	6,453
Nonregulated	—		5		1		21		—		3		303		302			635
Total Customer Revenue	2,294		1,451		1,353		486		610		357		303		234			7,088
Other revenue	83		14		14		38		2		—		97		63			311
Total	$	2,377	$	1,465	$	1,367	$	524	$	612	$	357	$	400	$	297		$	7,399

Remaining Performance Obligations

HomeServices [Member]

The following table summarizes the Company's real estate services Customer Revenue by line of business (in millions):



	HomeServices
	Three-Month Periods				Six-Month Periods
	Ended June 30,				Ended June 30,
	2019		2018		2019		2018
Customer Revenue:
Brokerage	$	1,204	$	1,168	$	1,915	$	1,853
Franchise	19		19		33		34
Total Customer Revenue	1,223		1,187		1,948		1,887
Other revenue	104		86		164		147
Total	$	1,327	$	1,273	$	2,112	$	2,034

The following table summarizes PacifiCorp's revenue from contracts with customers ("Customer Revenue") by customer class (in millions):



	Three-Month Periods				Six-Month Periods
	Ended June 30,				Ended June 30,
	2019		2018		2019		2018
Customer Revenue:
Retail:
Residential	$	349	$	365	$	838	$	806
Commercial	373		369		733		711
Industrial	289		288		581		557
Other retail	74		73		103		98
Total retail	1,085		1,095		2,255		2,172
Wholesale	11		9		39		31
Transmission	25		30		50		52
Other Customer Revenue	22		20		38		39
Total Customer Revenue	1,143		1,154		2,382		2,294
Other revenue	24		39		44		83
Total operating revenue	$	1,167	$	1,193	$	2,426	$	2,377

The following table summarizes Nevada Power's revenue from contracts with customers ("Customer Revenue") by customer class (in millions):



	Three-Month Periods				Six-Month Periods
	Ended June 30,				Ended June 30,
	2019		2018		2019		2018
Customer Revenue:
Retail:
Residential	$	266	$	312	$	466	$	505
Commercial	114		110		204		205
Industrial	112		108		182		187
Other	6		5		11		11
Total fully bundled	498		535		863		908
Distribution only service	8		8		15		15
Total retail	506		543		878		923
Wholesale, transmission and other	14		13		31		23
Total Customer Revenue	520		556		909		946
Other revenue	7		6		13		11
Total revenue	$	527	$	562	$	922	$	957



	Three-Month Periods
	Ended June 30,
	2019						2018
	Electric		Gas		Total		Electric		Gas		Total
Customer Revenue:
Retail:
Residential	$	58	$	14	$	72	$	59	$	13	$	72
Commercial	54		5		59		58		4		62
Industrial	46		2		48		38		2		40
Other	1		—		1		1		—		1
Total fully bundled	159		21		180		156		19		175
Distribution only service	1		—		1		1		—		1
Total retail	160		21		181		157		19		176
Wholesale, transmission and other	11		—		11		10		—		10
Total Customer Revenue	171		21		192		167		19		186
Other revenue	1		1		2		2		—		2
Total revenue	$	172	$	22	$	194	$	169	$	19	$	188



	Six-Month Periods
	Ended June 30,
	2019						2018
	Electric		Gas		Total		Electric		Gas		Total
Customer Revenue:
Retail:
Residential	$	126	$	38	$	164	$	127	$	39	$	166
Commercial	108		15		123		115		15		130
Industrial	85		5		90		77		5		82
Other	3		—		3		3		—		3
Total fully bundled	322		58		380		322		59		381
Distribution only service	2		—		2		2		—		2
Total retail	324		58		382		324		59		383
Wholesale, transmission and other	28		—		28		23		—		23
Total Customer Revenue	352		58		410		347		59		406
Other revenue	2		1		3		3		1		4
Total revenue	$	354	$	59	$	413	$	350	$	60	$	410

Accumulated Other Comprehensive Income (Loss) [Line Items]



	For the Three-Month Period Ended June 30, 2019									For the Six-Month Period Ended June 30, 2019
	Electric		Natural Gas			Other		Total		Electric		Natural Gas		Other		Total
Customer Revenue:
Retail:
Residential	$	148	$	66		$	—	$	214	$	319	$	241	$	—	$	560
Commercial	79		19			—		98		154		85		—		239
Industrial	204		3			—		207		367		9		—		376
Natural gas transportation services	—		8			—		8		—		20		—		20
Other retail⁽¹⁾	35		(1		)	—		34		70		—		—		70
Total retail	466		95			—		561		910		355		—		1,265
Wholesale	51		15			—		66		127		49		—		176
Multi-value transmission projects	14		—			—		14		30		—		—		30
Other Customer Revenue	—		—			10		10		—		—		15		15
Total Customer Revenue	531		110			10		651		1,067		404		15		1,486
Other revenue	7		1			—		8		13		2		—		15
Total operating revenue	$	538	$	111		$	10	$	659	$	1,080	$	406	$	15	$	1,501



	For the Three-Month Period Ended June 30, 2018								For the Six-Month Period Ended June 30, 2018
	Electric		Natural Gas		Other		Total		Electric		Natural Gas		Other		Total
Customer Revenue:
Retail:
Residential	$	173	$	65	$	—	$	238	$	334	$	233	$	—	$	567
Commercial	80		21		—		101		151		83		—		234
Industrial	195		5		—		200		340		10		—		350
Natural gas transportation services	—		6		—		6		—		19		—		19
Other retail⁽¹⁾	57		6		—		63		67		—		—		67
Total retail	505		103		—		608		892		345		—		1,237
Wholesale	63		23		—		86		125		55		—		180
Multi-value transmission projects	14		—		—		14		29		—		—		29
Other Customer Revenue	—		—		1		1		—		—		3		3
Total Customer Revenue	582		126		1		709		1,046		400		3		1,449
Other revenue	7		1		—		8		12		2		—		14
Total operating revenue	$	589	$	127	$	1	$	717	$	1,058	$	402	$	3	$	1,463

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Components of Accumulated Other Comprehensive Loss, Net (Tables)

6 Months Ended

Jun. 30, 2019

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 (loss) income	51			(234		)	—			1			(182		)
Balance, June 30, 2018	$	(332	)	$	(1,363	)	$	—		$	30		$	(1,665	)

Balance, December 31, 2018	$	(358	)	$	(1,623	)	$	—		$	36		$	(1,945	)
Other comprehensive (loss) income	(14		)	106			—			(35		)	57
Balance, June 30, 2019	$	(372	)	$	(1,517	)	$	—		$	1		$	(1,888	)

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Segment Information (Tables)

6 Months Ended

Jun. 30, 2019

Schedule of Segment Reporting Information, by Segment



	Three-Month Periods				Six-Month Periods
	Ended June 30,				Ended June 30,
	2019		2018		2019		2018
Operating revenue:
PacifiCorp	$	1,167	$	1,193	$	2,426	$	2,377
MidAmerican Funding	660		718		1,502		1,465
NV Energy	721		750		1,335		1,367
Northern Powergrid	243		246		506		524
BHE Pipeline Group	212		236		583		612
BHE Transmission	175		177		343		357
BHE Renewables	249		246		416		400
HomeServices	1,327		1,273		2,112		2,034
BHE and Other⁽¹⁾	140		154		281		297
Total operating revenue	$	4,894	$	4,993	$	9,504	$	9,433



Depreciation and amortization:
PacifiCorp	$	209		$	197		$	414		$	399
MidAmerican Funding	179			208			356			366
NV Energy	120			114			240			227
Northern Powergrid	63			64			126			127
BHE Pipeline Group	29			30			57			72
BHE Transmission	60			61			118			123
BHE Renewables	69			66			139			130
HomeServices	11			11			24			23
BHE and Other⁽¹⁾	(1		)	(1		)	(2		)	(1		)
Total depreciation and amortization	$	739		$	750		$	1,472		$	1,466



	Three-Month Periods						Six-Month Periods
	Ended June 30,						Ended June 30,
	2019			2018			2019			2018
Operating income:
PacifiCorp	$	268		$	284		$	552		$	531
MidAmerican Funding	94			87			210			166
NV Energy	150			144			234			233
Northern Powergrid	110			111			239			258
BHE Pipeline Group	68			57			311			283
BHE Transmission	77			81			153			162
BHE Renewables	97			104			115			132
HomeServices	117			108			96			100
BHE and Other⁽¹⁾	(22		)	(4		)	(32		)	(22		)
Total operating income	959			972			1,878			1,843
Interest expense	(476		)	(461		)	(953		)	(927		)
Capitalized interest	17			15			33			27
Allowance for equity funds	38			24			70			45
Interest and dividend income	36			32			66			58
Gains (losses) on marketable securities, net	6			(387		)	(62		)	(596		)
Other, net	30			1			65			31
Total income before income tax expense and equity income	$	610		$	196		$	1,097		$	481



Interest expense:
PacifiCorp	$	102	$	96	$	198	$	192
MidAmerican Funding	74		61		149		124
NV Energy	56		59		118		117
Northern Powergrid	35		36		69		73
BHE Pipeline Group	12		10		24		20
BHE Transmission	39		42		78		85
BHE Renewables	44		49		88		101
HomeServices	7		6		14		10
BHE and Other⁽¹⁾	107		102		215		205
Total interest expense	$	476	$	461	$	953	$	927



Operating revenue by country:
United States	$	4,476	$	4,570	$	8,653	$	8,548
United Kingdom	242		245		505		522
Canada	175		177		343		357
Philippines and other	1		1		3		6
Total operating revenue by country	$	4,894	$	4,993	$	9,504	$	9,433



Income before income tax benefit and equity income (loss) by country:
United States	$	482	$	93	$	818	$	211
United Kingdom	76		49		179		161
Canada	39		41		79		82
Philippines and other	13		13		21		27
Total income before income tax benefit and equity income (loss) by country	$	610	$	196	$	1,097	$	481



	As of
	June 30,		December 31,
	2019		2018
Assets:
PacifiCorp	$	24,528	$	23,478
MidAmerican Funding	21,140		20,029
NV Energy	14,189		14,119
Northern Powergrid	7,587		7,427
BHE Pipeline Group	5,627		5,511
BHE Transmission	8,720		8,424
BHE Renewables	8,942		8,666
HomeServices	4,056		2,797
BHE and Other⁽¹⁾	1,353		1,738
Total assets	$	96,142	$	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.

Schedule of Goodwill

e following table shows the change in the carrying amount of goodwill by reportable segment for the six-month period ended June 30, 2019 (in millions):



										BHE Pipeline Group
	PacifiCorp		MidAmerican Funding		NV Energy		Northern Powergrid					BHE Transmission		BHE Renewables		HomeServices
	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	—		—		—		—			—		—		—		23		23
Foreign currency translation	—		—		—		(3		)	—		60		—		—		57
June 30, 2019	$	1,129	$	2,102	$	2,369	$	949		$	73	$	1,508	$	95	$	1,450	$	9,675

Schedule of Segment Reporting Information, by Segment

The following tables provide information on a reportable segment basis (in millions):



	Three-Month Periods						Six-Month Periods
	Ended June 30,						Ended June 30,
	2019			2018			2019			2018
Operating revenue:
Regulated electric	$	538		$	589		$	1,080		$	1,058
Regulated natural gas	111			127			406			402
Other	10			1			15			3
Total operating revenue	$	659		$	717		$	1,501		$	1,463

Operating income:
Regulated electric	$	87		$	78		$	153		$	114
Regulated natural gas	5			8			53			51
Other	2			1			3			1
Total operating income	94			87			209			166
Interest expense	(70		)	(56		)	(139		)	(114		)
Allowance for borrowed funds	7			4			13			8
Allowance for equity funds	17			13			32			23
Other, net	10			12			30			21
Income before income tax benefit	$	58		$	60		$	145		$	104



	As of
	June 30, 2019		December 31, 2018
Assets:
Regulated electric	$	17,735	$	16,511
Regulated natural gas	1,289		1,406
Other	3		3
Total assets	$	19,027	$	17,920

Schedule of Segment Reporting Information, by Segment

The following tables provide information on a reportable segment basis (in millions):



	Three-Month Periods						Six-Month Periods
	Ended June 30,						Ended June 30,
	2019			2018			2019			2018
Operating revenue:
Regulated electric	$	538		$	589		$	1,080		$	1,058
Regulated natural gas	111			127			406			402
Other	11			2			16			5
Total operating revenue	$	660		$	718		$	1,502		$	1,465

Operating income:
Regulated electric	$	87		$	78		$	153		$	114
Regulated natural gas	5			8			53			51
Other	2			1			4			1
Total operating income	94			87			210			166
Interest expense	(74		)	(61		)	(149		)	(124		)
Allowance for borrowed funds	7			4			13			8
Allowance for equity funds	17			13			32			23
Other, net	10			13			31			23
Income before income tax benefit	$	54		$	56		$	137		$	96



	As of
	June 30, 2019		December 31, 2018
Assets⁽¹⁾:
Regulated electric	$	18,926	$	17,702
Regulated natural gas	1,368		1,485
Other	19		15
Total assets	$	20,313	$	19,202



(1)	Assets by reportable segment reflect the assignment of goodwill to applicable reporting units.

Schedule of Segment Reporting Information, by Segment



	As of
	June 30,		December 31,
	2019		2018
Assets:
Regulated electric	$	3,237	$	3,177
Regulated natural gas	316		314
Regulated common assets⁽¹⁾	41		78
Total assets	$	3,594	$	3,569


(1)	Consists principally of cash and cash equivalents not included in either the regulated electric or regulated natural gas segments.

XML 109 R65.htm IDEA: XBRL DOCUMENT

General (Details)	6 Months Ended
General (Details)	Jun. 30, 2019 OperatingSegments OwnedAndOperatedCompanies
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

XML 110 R66.htm IDEA: XBRL DOCUMENT

Investments and Restricted Cash and Investments (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Investments [Abstract]
Investments	$ 1,931		$ 1,931		$ 1,974
Equity Method Investments [Abstract]
Equity Method Investments	2,595		2,595		2,440
Restricted Cash and Investments [Abstract]
Restricted cash and investments	803		803		760
Investments, including equity method investments and restricted cash and investments	5,329		5,329		5,174
Investments, including equity method investments and restricted cash and investments, current	237		237		271
Investments, including equity method investments and restricted cash and investments, noncurrent	5,092		5,092		4,903
Gain on Sale of Investments	6	$ (387)	(62)	$ (596)
Marketable Securities, Realized Gain (Loss)	(1)	(1)	(1)	1
Marketable Securities, Gain (Loss)	7	$ (386)	(61)	(597)
Quad Cities Station nuclear decommissioning trust funds [Member]
Restricted Cash and Investments [Abstract]
Decommissioning fund investments, fair value	562		562		504
Other restricted cash and investments [Member]
Restricted Cash and Investments [Abstract]
Restricted cash and investments	241		241		256
Equity Method Investments, tax equity investments [Member]
Equity Method Investments [Abstract]
Equity Method Investments	1,797		1,797		1,661
ETT [Member]
Equity Method Investments [Abstract]
Equity Method Investments	537		537		527
Bridger Coal Company [Member]
Equity Method Investments [Abstract]
Equity Method Investments	89		89		99
Other equity method investments [Member]
Equity Method Investments [Abstract]
Equity Method Investments	172		172		153
BYD Company Limited common stock [Member]
Investments [Abstract]
Available-for-sale securities, equity securities	1,358		1,358		1,435
Rabbi trusts [Member]
Investments [Abstract]
Rabbi trusts, amount	392		392		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

XML 111 R67.htm IDEA: XBRL DOCUMENT

Property, Plant and Equipment, Net (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Property, plant and equipment in service, net	$ 65,608	$ 64,977
Construction in Progress, Gross	4,331	3,110
Property, plant and equipment, net	69,939	68,087
Regulated Operation [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment	85,658	84,231
Accumulated depreciation and amortization	(26,637)	(25,894)
Property, plant and equipment in service, net	59,021	58,337
Construction in Progress, Gross	4,100	2,900
Regulated Operation [Member] \| Utility generation, transmission and distribution systems
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 78,087	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	$ 7,571	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	$ 8,587	8,250
Accumulated depreciation and amortization	(2,000)	(1,610)
Property, plant and equipment in service, net	6,587	6,640
Unregulated Operation [Member] \| Independent power plants
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 6,962	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	$ 1,625	$ 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

XML 112 R68.htm IDEA: XBRL DOCUMENT

Property, Plant and Equipment, Net - PacifiCorp (Details) - PacifiCorp [Member] - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Electric Property Plant And Equipment In Service Gross	$ 28,588	$ 28,399
Public utility accumulated depreciation and amortization	(10,234)	(10,034)
Public Utilities Property, Plant And Equipment In Service, Net	18,354	18,365
Public Utilities, Property, Plant and Equipment, Net, Excluding Construction Work In Progress	18,364	18,375
Public Utilities, Property, Plant and Equipment, Construction Work in Progress	1,792	1,195
Public Utilities, Property, Plant and Equipment, Net	$ 20,156	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	$ 1,425	1,436
Electricity Generation Plant, Non-Nuclear [Member]
Property, Plant and Equipment [Line Items]
Electric Property Plant And Equipment In Service Gross	12,588	12,606
Electric Transmission [Member]
Property, Plant and Equipment [Line Items]
Electric Property Plant And Equipment In Service Gross	6,451	6,357
Electric Distribution [Member]
Property, Plant and Equipment [Line Items]
Electric Property Plant And Equipment In Service Gross	7,150	7,030
Other Intangible Assets [Member]
Property, Plant and Equipment [Line Items]
Electric Property Plant And Equipment In Service Gross	974	970
Unregulated Operation [Member]
Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Net, Excluding Construction Work In Progress	$ 10	$ 10

XML 113 R69.htm IDEA: XBRL DOCUMENT

Property, Plant and Equipment, Net Property, Plant and Equipment, Net - MEC (Details) - MidAmerican Energy Company [Member] - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Net, Excluding Construction Work In Progress	$ 15,439	$ 15,122
Public Utilities, Property, Plant and Equipment, Construction Work in Progress	1,513	1,035
Property, plant and equipment, net	16,952	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	21,634	21,057
Public Utilities, Property, Plant and Equipment, Accumulated Depreciation	(6,201)	(5,941)
Public Utilities, Property, Plant and Equipment, Net, Excluding Construction Work In Progress	15,433	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	$ 14,124	13,727
Public Utilities, Property, Plant and Equipment, Transmission	1,974	1,934
Public Utilities, Property, Plant and Equipment, Distribution	$ 3,786	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	$ 1,750	$ 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

XML 114 R70.htm IDEA: XBRL DOCUMENT

Property, Plant and Equipment, Net Property, Plant and Equipment, Net - MidAmerican Funding (Details) - MidAmerican Funding, LLC and Subsidiaries [Domain] - Other assets - USD ($) $ in Millions	Jun. 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)

XML 115 R71.htm IDEA: XBRL DOCUMENT

Property, Plant and Equipment, Net Property, Plant and Equipment, Net - NPC (Details) - Nevada Power Company [Member] - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Net, Excluding Construction Work In Progress	$ 6,325	$ 6,321
Public Utilities, Property, Plant and Equipment, Construction Work in Progress	132	97
Property, plant and equipment, net	6,457	6,418
Regulated Operation [Member]
Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Generation or Processing	3,724	3,720
Public Utilities, Property, Plant and Equipment, Distribution	3,472	3,411
Public Utilities, Property, Plant and Equipment, Transmission	1,446	1,439
Public Utilities, Property, Plant and Equipment, Other Property, Plant and Equipment	709	716
Public Utilities, Property, Plant and Equipment, Plant in Service, Excluding Construction Work In Progress	9,351	9,286
Public Utilities, Property, Plant and Equipment, Accumulated Depreciation	3,027	2,966
Public Utilities, Property, Plant and Equipment, Net, Excluding Construction Work In Progress	$ 6,324	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

XML 116 R72.htm IDEA: XBRL DOCUMENT

Property, Plant and Equipment, Net Property, Plant and Equipment, Net - SPPC (Details) - Sierra Pacific Power Company [Member] - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Net, Excluding Construction Work In Progress	$ 2,911	$ 2,857
Property, plant and equipment, net	2,992	2,947
Common Facilities [Member]
Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Construction Work in Progress	81	90
Property, plant and equipment, net	2,992	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	1,134	1,132
Public Utilities, Property, Plant and Equipment, Distribution	1,631	1,568
Public Utilities, Property, Plant and Equipment, Transmission	828	812
Public Utilities, Property, Plant and Equipment, Other Property, Plant and Equipment	$ 177	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	$ 408	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	$ 318	321
Public Utilities, Property, Plant and Equipment, Plant in Service, Excluding Construction Work In Progress	4,510	4,435
Public Utilities, Property, Plant and Equipment, Accumulated Depreciation	1,604	1,583
Public Utilities, Property, Plant and Equipment, Net, Excluding Construction Work In Progress	$ 2,906	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	$ 5	$ 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

XML 117 R73.htm IDEA: XBRL DOCUMENT

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

XML 118 R74.htm IDEA: XBRL DOCUMENT

Cash and Cash Equivalents and Restricted Cash and Cash Equivalents Supplemental Cash Flow Disclosure (Details) - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018	Jun. 30, 2018	Dec. 31, 2017
Condensed Cash Flow Statements, Captions [Line Items]
Cash and cash equivalents	$ 1,265	$ 627
Restricted cash and cash equivalents	214	227
Restricted Cash and Cash Equivalents, Noncurrent	27	29
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	$ 1,506	$ 883	$ 1,544	$ 1,283

XML 119 R75.htm IDEA: XBRL DOCUMENT

Cash and Cash Equivalents and Restricted Cash and Cash Equivalents Supplemental Cash Flow Disclosures - MEC (Details) - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018	Jun. 30, 2018	Dec. 31, 2017
Condensed Cash Flow Statements, Captions [Line Items]
Cash and cash equivalents	$ 1,265	$ 627
Restricted cash and cash equivalents	214	227
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	1,506	883	$ 1,544	$ 1,283
MidAmerican Energy Company [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Cash and cash equivalents	185	0
Restricted cash and cash equivalents	46	56
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	$ 231	$ 56	$ 456	$ 282

XML 120 R76.htm IDEA: XBRL DOCUMENT

Cash and Cash Equivalents and Restricted Cash and Cash Equivalents Supplemental Cash Flow Disclosures - LLC (Details) - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018	Jun. 30, 2018	Dec. 31, 2017
Condensed Cash Flow Statements, Captions [Line Items]
Cash and cash equivalents	$ 1,265	$ 627
Restricted cash and cash equivalents	214	227
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	1,506	883	$ 1,544	$ 1,283
MidAmerican Funding, LLC and Subsidiaries [Domain]
Condensed Cash Flow Statements, Captions [Line Items]
Cash and cash equivalents	186	1
Restricted cash and cash equivalents	46	56
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	$ 232	$ 57	$ 457	$ 282

XML 121 R77.htm IDEA: XBRL DOCUMENT

Cash and Cash Equivalents and Restricted Cash and Cash Equivalents Supplemental Cash Flow Disclosure - Pacificorp (Details) - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018	Jun. 30, 2018	Dec. 31, 2017
Condensed Cash Flow Statements, Captions [Line Items]
Cash and cash equivalents	$ 1,265	$ 627
Restricted cash and cash equivalents	214	227
Restricted Cash and Cash Equivalents, Noncurrent	27	29
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	1,506	883	$ 1,544	$ 1,283
PacifiCorp [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Cash and cash equivalents	536	77
Restricted cash and cash equivalents	16	13
Restricted Cash and Cash Equivalents, Noncurrent	2	2
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	$ 554	$ 92	$ 37	$ 29

XML 122 R78.htm IDEA: XBRL DOCUMENT

Cash and Cash Equivalents and Restricted Cash and Cash Equivalents Supplemental Cash Flow Disclosure - NPC (Details) - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018	Jun. 30, 2018	Dec. 31, 2017
Condensed Cash Flow Statements, Captions [Line Items]
Cash and cash equivalents	$ 1,265	$ 627
Restricted cash and cash equivalents	214	227
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	1,506	883	$ 1,544	$ 1,283
Nevada Power Company [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Cash and cash equivalents	81	111
Restricted cash and cash equivalents	9	10
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	$ 90	$ 121	$ 423	$ 66

XML 123 R79.htm IDEA: XBRL DOCUMENT

Cash and Cash Equivalents and Restricted Cash and Cash Equivalents Supplemental Cash Flow Disclosure - SPPC (Details) - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018	Jun. 30, 2018	Dec. 31, 2017
Condensed Cash Flow Statements, Captions [Line Items]
Cash and cash equivalents	$ 1,265	$ 627
Restricted cash and cash equivalents	214	227
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	1,506	883	$ 1,544	$ 1,283
Sierra Pacific Power Company [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Cash and cash equivalents	28	71
Restricted cash and cash equivalents	5	5
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	$ 33	$ 76	$ 75	$ 8

XML 124 R80.htm IDEA: XBRL DOCUMENT

Leases Leases - Summary (Details) $ in Millions	Jun. 30, 2019 USD ($)
Leases [Abstract]
Operating Lease, Right-of-Use Asset	$ 553
Finance Lease, Right-of-Use Asset	509
Total Right-of-Use Asset	1,062
Operating Lease, Liability	597
Finance Lease, Liability	523
Total Lease Liabilities	$ 1,120

XML 125 R81.htm IDEA: XBRL DOCUMENT

Leases Leases - Lease Costs (Details) $ in Millions	3 Months Ended	6 Months Ended
Leases Leases - Lease Costs (Details) $ in Millions	Jun. 30, 2019 USD ($)	Jun. 30, 2019 USD ($)
Leases [Abstract]
Variable Lease, Cost	$ 153	$ 296
Operating Lease, Cost	41	82
Finance Lease, Right-of-Use Asset, Amortization	4	8
Finance Lease, Interest Expense	10	21
Short-term Lease, Cost	1	3
Lease, Cost	$ 209	$ 410
Operating Lease, Weighted Average Remaining Lease Term	8 years	8 years
Finance Lease, Weighted Average Remaining Lease Term	29 years 1 month 6 days	29 years 1 month 6 days
Operating Lease, Weighted Average Discount Rate, Percent	5.20%	5.20%
Finance Lease, Weighted Average Discount Rate, Percent	8.70%	8.70%

XML 126 R82.htm IDEA: XBRL DOCUMENT

Leases Leases - Other (Details) $ in Millions	6 Months Ended
Leases Leases - Other (Details) $ in Millions	Jun. 30, 2019 USD ($)
Leases [Abstract]
Operating Lease, Payments	$ (70)
Finance Lease, Interest Payment on Liability	(22)
Finance Lease, Principal Payments	(9)
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	49
Right-of-Use Asset Obtained in Exchange for Finance Lease Liability	$ 6

XML 127 R83.htm IDEA: XBRL DOCUMENT

Leases Leases - Maturity Table (Details) - USD ($)
$ in Millions

Jun. 30, 2019

Dec. 31, 2018

Operating Lease Liabilities, Payments Due [Abstract]

Lessee, Operating Lease, Liability, Payments, Remainder of Fiscal Year

$ 77

Lessee, Operating Lease, Liability, Payments, Due Year Two

139

Lessee, Operating Lease, Liability, Payments, Due Year Three

117

Lessee, Operating Lease, Liability, Payments, Due Year Four

Lessee, Operating Lease, Liability, Payments, Due Year Five

Lessee, Operating Lease, Liability, Payments, Due after Year Five

236

Lessee, Operating Lease, Liability, Undiscounted Excess Amount

728

(131)

Finance Lease Liabilities, Payments, Due [Abstract]

597

Finance Lease, Liability, Payments, Remainder of Fiscal Year

Finance Lease, Liability, Payments, Due after Year Five

776

1,084

Finance Lease, Liability, Undiscounted Excess Amount

523

(561)

Lease, Liability, Payments, Remainder of Fiscal Year

116

$ 216

^[1]

208

196

^[1]

192

183

^[1]

161

154

^[1]

123

117

^[1]

1,012

931

^[1]

1,812

1,797

^[1]

(692)

Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]

$ 1,120

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]

Operating Leases, Future Minimum Payments, Due in Five Years

^[1]

Operating Leases, Future Minimum Payments, Due Thereafter

^[1]

159

Capital Leases, Future Minimum Payments, Net Present Value [Abstract]

^[1]

692

Capital Leases, Future Minimum Payments Due, Next Twelve Months

^[1]

Capital Leases, Future Minimum Payments Due in Two Years

^[1]

Capital Leases, Future Minimum Payments Due in Three Years

^[1]

Capital Leases, Future Minimum Payments Due in Four Years

^[1]

Capital Leases, Future Minimum Payments Due in Five Years

^[1]

Capital Leases, Future Minimum Payments Due Thereafter

^[1]

772

Operating Lease Liabilities, Payments Due [Abstract]

^[1]

$ 1,105

[1]	(1) Amounts included for comparability and accounted for in accordance with ASC 840, "Leases".

XML 128 R84.htm IDEA: XBRL DOCUMENT

Leases Leases - PacifiCorp - Summary (Details) $ in Millions	Jun. 30, 2019 USD ($)
Lessee, Lease, Description [Line Items]
Operating Lease, Right-of-Use Asset	$ 553
Finance Lease, Right-of-Use Asset	509
Total Right-of-Use Asset	1,062
Operating Lease, Liability	597
Finance Lease, Liability	523
Total Lease Liabilities	1,120
PacifiCorp [Member]
Lessee, Lease, Description [Line Items]
Operating Lease, Right-of-Use Asset	14
Finance Lease, Right-of-Use Asset	20
Total Right-of-Use Asset	34
Operating Lease, Liability	14
Finance Lease, Liability	20
Total Lease Liabilities	$ 34

XML 129 R85.htm IDEA: XBRL DOCUMENT

Leases Leases - PacifiCorp - Lease Costs (Details) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2019 USD ($)	Jun. 30, 2019 USD ($)
Lessee, Lease, Description [Line Items]
Variable Lease, Cost	$ 153	$ 296
Operating Lease, Cost	41	82
Finance Lease, Right-of-Use Asset, Amortization	4	8
Finance Lease, Interest Expense	10	21
Short-term Lease, Cost	1	3
Lease, Cost	$ 209	$ 410
Operating Lease, Weighted Average Remaining Lease Term	8 years	8 years
Finance Lease, Weighted Average Remaining Lease Term	29 years 1 month 6 days	29 years 1 month 6 days
Operating Lease, Weighted Average Discount Rate, Percent	5.20%	5.20%
Finance Lease, Weighted Average Discount Rate, Percent	8.70%	8.70%
PacifiCorp [Member]
Lessee, Lease, Description [Line Items]
Variable Lease, Cost	$ 16	$ 26
Operating Lease, Cost	1	1
Finance Lease, Right-of-Use Asset, Amortization	0	1
Finance Lease, Interest Expense	1	1
Short-term Lease, Cost	1	1
Lease, Cost	$ 19	$ 30
Operating Lease, Weighted Average Remaining Lease Term	13 years 7 months 6 days	13 years 7 months 6 days
Finance Lease, Weighted Average Remaining Lease Term	9 years 6 months 9 days	9 years 6 months 9 days
Operating Lease, Weighted Average Discount Rate, Percent	3.70%	3.70%
Finance Lease, Weighted Average Discount Rate, Percent	10.60%	10.60%

XML 130 R86.htm IDEA: XBRL DOCUMENT

Leases Leases - PacifiCorp - Maturity Table (Details) - USD ($)
$ in Millions

Jun. 30, 2019

Dec. 31, 2018

Lessee, Operating Lease, Liability, Payments, Remainder of Fiscal Year

$ 77

Lessee, Operating Lease, Liability, Payments, Due Year Two

139

Lessee, Operating Lease, Liability, Payments, Due Year Three

117

Lessee, Operating Lease, Liability, Payments, Due Year Four

Lessee, Operating Lease, Liability, Payments, Due Year Five

Lessee, Operating Lease, Liability, Payments, Due after Year Five

236

Lessee, Operating Lease, Liability, Undiscounted Excess Amount

728

(131)

Finance Lease Liabilities, Payments, Due [Abstract]

597

Finance Lease, Liability, Payments, Remainder of Fiscal Year

Finance Lease, Liability, Payments, Due after Year Five

776

Finance Lease, Liability, Undiscounted Excess Amount

1,084

(561)

Lease, Liability, Payments, Remainder of Fiscal Year

523

116

$ 216

^[1]

208

196

^[1]

192

183

^[1]

161

154

^[1]

123

117

^[1]

1,012

931

^[1]

1,812

1,797

^[1]

(692)

Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]

1,120

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]

Operating Leases, Future Minimum Payments, Due in Five Years

^[1]

Operating Leases, Future Minimum Payments, Due Thereafter

^[1]

159

Capital Leases, Future Minimum Payments, Net Present Value [Abstract]

^[1]

692

Capital Leases, Future Minimum Payments Due, Next Twelve Months

^[1]

Capital Leases, Future Minimum Payments Due in Two Years

^[1]

Capital Leases, Future Minimum Payments Due in Three Years

^[1]

Capital Leases, Future Minimum Payments Due in Four Years

^[1]

Capital Leases, Future Minimum Payments Due in Five Years

^[1]

Capital Leases, Future Minimum Payments Due Thereafter

^[1]

772

^[1]

1,105

Operating Lease Liabilities, Payments Due [Abstract]

Lessee, Operating Lease, Liability, Payments, Remainder of Fiscal Year

Lessee, Operating Lease, Liability, Payments, Due Year Two

Lessee, Operating Lease, Liability, Payments, Due Year Three

Lessee, Operating Lease, Liability, Payments, Due Year Four

Lessee, Operating Lease, Liability, Payments, Due Year Five

Lessee, Operating Lease, Liability, Payments, Due after Year Five

Lessee, Operating Lease, Liability, Undiscounted Excess Amount

(4)

Finance Lease Liabilities, Payments, Due [Abstract]

Finance Lease, Liability, Payments, Remainder of Fiscal Year

Finance Lease, Liability, Payments, Due after Year Five

Finance Lease, Liability, Undiscounted Excess Amount

(13)

Lease, Liability, Payments, Remainder of Fiscal Year

(17)

Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]

$ 34

Operating Leases, Future Minimum Payments Due, Next Twelve Months

Operating Leases, Future Minimum Payments, Due in Two Years

Operating Leases, Future Minimum Payments, Due in Three Years

Operating Leases, Future Minimum Payments, Due in Four Years

Operating Leases, Future Minimum Payments, Due in Five Years

Operating Leases, Future Minimum Payments, Due Thereafter

Capital Leases, Future Minimum Payments, Net Present Value [Abstract]

Capital Leases, Future Minimum Payments Due, Next Twelve Months

Capital Leases, Future Minimum Payments Due in Two Years

Capital Leases, Future Minimum Payments Due in Three Years

Capital Leases, Future Minimum Payments Due in Four Years

Capital Leases, Future Minimum Payments Due in Five Years

Capital Leases, Future Minimum Payments Due Thereafter

Operating Lease Liabilities, Payments Due [Abstract]

$ 36

[1]	(1) Amounts included for comparability and accounted for in accordance with ASC 840, "Leases".

XML 131 R87.htm IDEA: XBRL DOCUMENT

Leases Leases - NPC - Summary (Details) - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
Lessee, Lease, Description [Line Items]
Operating Lease, Right-of-Use Asset	$ 553
Finance Lease, Right-of-Use Asset	509
Total Right-of-Use Asset	1,062
Operating Lease, Liability	597
Finance Lease, Liability	523
Total Lease Liabilities	1,120
Nevada Power Company [Member]
Lessee, Lease, Description [Line Items]
Operating Lease, Right-of-Use Asset	14
Finance Lease, Right-of-Use Asset	449	$ 450
Total Right-of-Use Asset	463
Operating Lease, Liability	18
Finance Lease, Liability	462
Total Lease Liabilities	$ 480

XML 132 R88.htm IDEA: XBRL DOCUMENT

Leases Leases - NPC - Lease Costs (Details) $ in Millions	3 Months Ended	6 Months Ended
Leases Leases - NPC - Lease Costs (Details) $ in Millions	Jun. 30, 2019 USD ($)	Jun. 30, 2019 USD ($)
Lessee, Lease, Description [Line Items]
Variable Lease, Cost	$ 153	$ 296
Operating Lease, Cost	41	82
Finance Lease, Right-of-Use Asset, Amortization	4	8
Finance Lease, Interest Expense	10	21
Lease, Cost	$ 209	$ 410
Operating Lease, Weighted Average Remaining Lease Term	8 years	8 years
Finance Lease, Weighted Average Remaining Lease Term	29 years 1 month 6 days	29 years 1 month 6 days
Operating Lease, Weighted Average Discount Rate, Percent	5.20%	5.20%
Finance Lease, Weighted Average Discount Rate, Percent	8.70%	8.70%
Nevada Power Company [Member]
Lessee, Lease, Description [Line Items]
Variable Lease, Cost	$ 112	$ 220
Operating Lease, Cost	0	1
Finance Lease, Right-of-Use Asset, Amortization	3	6
Finance Lease, Interest Expense	10	20
Lease, Cost	$ 125	$ 247
Operating Lease, Weighted Average Remaining Lease Term	7 years 8 months 16 days	7 years 8 months 16 days
Finance Lease, Weighted Average Remaining Lease Term	30 years 9 months 10 days	30 years 9 months 10 days
Operating Lease, Weighted Average Discount Rate, Percent	4.40%	4.40%
Finance Lease, Weighted Average Discount Rate, Percent	8.60%	8.60%

XML 133 R89.htm IDEA: XBRL DOCUMENT

Leases Leases - NPC - Other (Details) $ in Millions	6 Months Ended
Leases Leases - NPC - Other (Details) $ in Millions	Jun. 30, 2019 USD ($)
Lessee, Lease, Description [Line Items]
Operating Lease, Payments	$ (70)
Finance Lease, Interest Payment on Liability	(22)
Finance Lease, Principal Payments	(9)
Right-of-Use Asset Obtained in Exchange for Finance Lease Liability	6
Nevada Power Company [Member]
Lessee, Lease, Description [Line Items]
Operating Lease, Payments	(1)
Finance Lease, Interest Payment on Liability	(20)
Finance Lease, Principal Payments	(7)
Right-of-Use Asset Obtained in Exchange for Finance Lease Liability	$ 4

XML 134 R90.htm IDEA: XBRL DOCUMENT

Leases Leases - NPC - Maturity Table (Details) - USD ($)
$ in Millions

Jun. 30, 2019

Dec. 31, 2018

Lessee, Operating Lease, Liability, Payments, Remainder of Fiscal Year

$ 77

Lessee, Operating Lease, Liability, Payments, Due Year Two

139

Lessee, Operating Lease, Liability, Payments, Due Year Three

117

Lessee, Operating Lease, Liability, Payments, Due Year Four

Lessee, Operating Lease, Liability, Payments, Due Year Five

Lessee, Operating Lease, Liability, Payments, Due after Year Five

236

Lessee, Operating Lease, Liability, Undiscounted Excess Amount

728

(131)

Finance Lease Liabilities, Payments, Due [Abstract]

597

Finance Lease, Liability, Payments, Remainder of Fiscal Year

Finance Lease, Liability, Payments, Due after Year Five

776

Finance Lease, Liability, Undiscounted Excess Amount

1,084

(561)

Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]

523

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]

Operating Leases, Future Minimum Payments, Due in Five Years

^[1]

Operating Leases, Future Minimum Payments, Due Thereafter

^[1]

159

Capital Leases, Future Minimum Payments, Net Present Value [Abstract]

^[1]

692

Capital Leases, Future Minimum Payments Due, Next Twelve Months

^[1]

Capital Leases, Future Minimum Payments Due in Two Years

^[1]

Capital Leases, Future Minimum Payments Due in Three Years

^[1]

Capital Leases, Future Minimum Payments Due in Four Years

^[1]

Capital Leases, Future Minimum Payments Due in Five Years

^[1]

Capital Leases, Future Minimum Payments Due Thereafter

^[1]

772

Lease, Liability, Payments, Remainder of Fiscal Year

^[1]

1,105

116

216

^[1]

208

196

^[1]

192

183

^[1]

161

154

^[1]

123

117

^[1]

1,012

931

^[1]

1,812

1,797

^[1]

(692)

1,120

Operating Lease Liabilities, Payments Due [Abstract]

Lessee, Operating Lease, Liability, Payments, Remainder of Fiscal Year

Lessee, Operating Lease, Liability, Payments, Due Year Two

Lessee, Operating Lease, Liability, Payments, Due Year Three

Lessee, Operating Lease, Liability, Payments, Due Year Four

Lessee, Operating Lease, Liability, Payments, Due Year Five

Lessee, Operating Lease, Liability, Payments, Due after Year Five

Lessee, Operating Lease, Liability, Undiscounted Excess Amount

(3)

Finance Lease Liabilities, Payments, Due [Abstract]

Finance Lease, Liability, Payments, Remainder of Fiscal Year

Finance Lease, Liability, Payments, Due after Year Five

712

Finance Lease, Liability, Undiscounted Excess Amount

979

(517)

Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]

462

Operating Leases, Future Minimum Payments Due, Next Twelve Months

^[2]

Operating Leases, Future Minimum Payments, Due in Two Years

^[2]

Operating Leases, Future Minimum Payments, Due in Three Years

^[2]

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

^[2]

Capital Leases, Future Minimum Payments, Net Present Value [Abstract]

^[2]

Capital Leases, Future Minimum Payments Due, Next Twelve Months

^[2]

Capital Leases, Future Minimum Payments Due in Two Years

^[2]

Capital Leases, Future Minimum Payments Due in Three Years

^[2]

Capital Leases, Future Minimum Payments Due in Four Years

^[2]

Capital Leases, Future Minimum Payments Due in Five Years

^[2]

Capital Leases, Future Minimum Payments Due Thereafter

^[2]

709

Lease, Liability, Payments, Remainder of Fiscal Year

^[2]

998

^[2]

^[2]

^[2]

^[2]

^[2]

722

719

^[2]

1,000

$ 1,022

^[2]

(520)

Operating Lease Liabilities, Payments Due [Abstract]

$ 480

[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".

XML 135 R91.htm IDEA: XBRL DOCUMENT

Leases Leases - SPPC - Summary (Details) $ in Millions	Jun. 30, 2019 USD ($)
Lessee, Lease, Description [Line Items]
Operating Lease, Right-of-Use Asset	$ 553
Finance Lease, Right-of-Use Asset	509
Total Right-of-Use Asset	1,062
Operating Lease, Liability	597
Finance Lease, Liability	523
Total Lease Liabilities	1,120
Sierra Pacific Power Company [Member]
Lessee, Lease, Description [Line Items]
Operating Lease, Right-of-Use Asset	19
Finance Lease, Right-of-Use Asset	39
Total Right-of-Use Asset	58
Operating Lease, Liability	19
Finance Lease, Liability	40
Total Lease Liabilities	$ 59

XML 136 R92.htm IDEA: XBRL DOCUMENT

Leases Leases - SPPC - Lease Costs (Details) $ in Millions	3 Months Ended	6 Months Ended
Leases Leases - SPPC - Lease Costs (Details) $ in Millions	Jun. 30, 2019 USD ($)	Jun. 30, 2019 USD ($)
Lessee, Lease, Description [Line Items]
Variable Lease, Cost	$ 153	$ 296
Operating Lease, Cost	41	82
Finance Lease, Right-of-Use Asset, Amortization	4	8
Finance Lease, Interest Expense	10	21
Lease, Cost	$ 209	$ 410
Operating Lease, Weighted Average Remaining Lease Term	8 years	8 years
Finance Lease, Weighted Average Remaining Lease Term	29 years 1 month 6 days	29 years 1 month 6 days
Operating Lease, Weighted Average Discount Rate, Percent	5.20%	5.20%
Finance Lease, Weighted Average Discount Rate, Percent	8.70%	8.70%
Sierra Pacific Power Company [Member]
Lessee, Lease, Description [Line Items]
Variable Lease, Cost	$ 15	$ 30
Operating Lease, Cost	1	1
Finance Lease, Right-of-Use Asset, Amortization	0	1
Finance Lease, Interest Expense	0	1
Lease, Cost	$ 16	$ 33
Operating Lease, Weighted Average Remaining Lease Term	26 years	26 years
Finance Lease, Weighted Average Remaining Lease Term	23 years	23 years
Operating Lease, Weighted Average Discount Rate, Percent	4.90%	4.90%
Finance Lease, Weighted Average Discount Rate, Percent	7.00%	7.00%

XML 137 R93.htm IDEA: XBRL DOCUMENT

Leases Leases - SPPC - Other (Details) $ in Millions	6 Months Ended
Leases Leases - SPPC - Other (Details) $ in Millions	Jun. 30, 2019 USD ($)
Lessee, Lease, Description [Line Items]
Operating Lease, Payments	$ (70)
Finance Lease, Interest Payment on Liability	(22)
Finance Lease, Principal Payments	(9)
Right-of-Use Asset Obtained in Exchange for Finance Lease Liability	6
Sierra Pacific Power Company [Member]
Lessee, Lease, Description [Line Items]
Operating Lease, Payments	(1)
Finance Lease, Interest Payment on Liability	(1)
Finance Lease, Principal Payments	(1)
Right-of-Use Asset Obtained in Exchange for Finance Lease Liability	$ 2

XML 138 R94.htm IDEA: XBRL DOCUMENT

Leases Leases - SPPC - Maturity Table (Details) - USD ($)
$ in Millions

Jun. 30, 2019

Dec. 31, 2018

Lessee, Operating Lease, Liability, Payments, Remainder of Fiscal Year

$ 77

Lessee, Operating Lease, Liability, Payments, Due Year Two

139

Lessee, Operating Lease, Liability, Payments, Due Year Three

117

Lessee, Operating Lease, Liability, Payments, Due Year Four

Lessee, Operating Lease, Liability, Payments, Due Year Five

Lessee, Operating Lease, Liability, Payments, Due after Year Five

236

Lessee, Operating Lease, Liability, Undiscounted Excess Amount

728

(131)

Finance Lease Liabilities, Payments, Due [Abstract]

597

Finance Lease, Liability, Payments, Remainder of Fiscal Year

Finance Lease, Liability, Payments, Due after Year Five

776

Finance Lease, Liability, Undiscounted Excess Amount

1,084

(561)

Lease, Liability, Payments, Remainder of Fiscal Year

523

116

$ 216

^[1]

208

196

^[1]

192

183

^[1]

161

154

^[1]

123

117

^[1]

1,012

931

^[1]

1,812

1,797

^[1]

(692)

Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]

1,120

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]

Operating Leases, Future Minimum Payments, Due in Five Years

^[1]

Operating Leases, Future Minimum Payments, Due Thereafter

^[1]

159

Capital Leases, Future Minimum Payments, Net Present Value [Abstract]

^[1]

692

Capital Leases, Future Minimum Payments Due, Next Twelve Months

^[1]

Capital Leases, Future Minimum Payments Due in Two Years

^[1]

Capital Leases, Future Minimum Payments Due in Three Years

^[1]

Capital Leases, Future Minimum Payments Due in Four Years

^[1]

Capital Leases, Future Minimum Payments Due in Five Years

^[1]

Capital Leases, Future Minimum Payments Due Thereafter

^[1]

772

^[1]

1,105

Operating Lease Liabilities, Payments Due [Abstract]

Lessee, Operating Lease, Liability, Payments, Remainder of Fiscal Year

Lessee, Operating Lease, Liability, Payments, Due Year Two

Lessee, Operating Lease, Liability, Payments, Due Year Three

Lessee, Operating Lease, Liability, Payments, Due Year Four

Lessee, Operating Lease, Liability, Payments, Due Year Five

Lessee, Operating Lease, Liability, Payments, Due after Year Five

Lessee, Operating Lease, Liability, Undiscounted Excess Amount

(16)

Finance Lease Liabilities, Payments, Due [Abstract]

Finance Lease, Liability, Payments, Remainder of Fiscal Year

Finance Lease, Liability, Payments, Due after Year Five

Finance Lease, Liability, Undiscounted Excess Amount

(31)

Lease, Liability, Payments, Remainder of Fiscal Year

^[2]

^[2]

^[2]

^[2]

^[2]

^[2]

106

^[2]

(47)

Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]

$ 59

Operating Leases, Future Minimum Payments Due, Next Twelve Months

^[2]

Operating Leases, Future Minimum Payments, Due in Two Years

^[2]

Operating Leases, Future Minimum Payments, Due in Three Years

^[2]

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

^[2]

Capital Leases, Future Minimum Payments, Net Present Value [Abstract]

^[2]

Capital Leases, Future Minimum Payments Due, Next Twelve Months

^[2]

Capital Leases, Future Minimum Payments Due in Two Years

^[2]

Capital Leases, Future Minimum Payments Due in Three Years

^[2]

Capital Leases, Future Minimum Payments Due in Four Years

^[2]

Capital Leases, Future Minimum Payments Due in Five Years

^[2]

Capital Leases, Future Minimum Payments Due Thereafter

^[2]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

^[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".

XML 139 R95.htm IDEA: XBRL DOCUMENT

Recent Financing Transactions Recent Financing Transactions - Long-Term Debt (Details) £ in Millions, $ in Millions	Jun. 30, 2019 USD ($)	May 31, 2019 GBP (£)	Mar. 31, 2019 USD ($)	Feb. 28, 2019 USD ($)	Jan. 31, 2019 USD ($)	Jun. 30, 2018 USD ($)
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%
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					7.13%

XML 140 R96.htm IDEA: XBRL DOCUMENT

Recent Financing Transactions Recent Financings Transactions - Credit Facilities (Details) - USD ($) $ in Millions	May 31, 2019	May 01, 2019
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

XML 141 R97.htm IDEA: XBRL DOCUMENT

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

XML 142 R98.htm IDEA: XBRL DOCUMENT

Recent Financing Transactions Recent Financing Transactions - MEC (Details) - MidAmerican Energy Company [Member] - USD ($) $ in Millions	Feb. 28, 2019	Jan. 31, 2019
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

XML 143 R99.htm IDEA: XBRL DOCUMENT

Recent Financing Transactions Recent Financing Transactions - NPC (Details) - Nevada Power Company [Member] - NVE Holdings [Member] - USD ($) $ in Millions	May 01, 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		7.13%
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

XML 144 R100.htm IDEA: XBRL DOCUMENT

Recent Financing Transactions Recent Financing Transactions - SPPC (Details) - NVE Holdings [Member] - Sierra Pacific Power Company [Member] - USD ($) $ in Millions	Jun. 01, 2019	May 01, 2019	Apr. 09, 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 2036 [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
Line of Credit [Member] \| Secured credit facility, $250 million, expiring June 2022 [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		$ 250

XML 145 R101.htm IDEA: XBRL DOCUMENT

Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
Income Taxes (Details) - USD ($) $ in Millions	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 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	(29.00%)	(78.00%)	(29.00%)	(58.00%)
State income tax, net of federal income tax benefit	(0.00%)	(19.00%)	(8.00%)	(25.00%)
Income tax effect of foreign income	(1.00%)	(4.00%)	(2.00%)	(11.00%)
Effects of ratemaking	(2.00%)	(8.00%)	(2.00%)	(8.00%)
Equity income	0.00%	1.00%	0.00%	1.00%
Other, net	(1.00%)	1.00%	(0.00%)	(1.00%)
Effective income tax rate	(12.00%)	(86.00%)	(20.00%)	(81.00%)
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			$ 0	$ 311

XML 146 R102.htm IDEA: XBRL DOCUMENT

Income Taxes - PAC (Details)	3 Months Ended		6 Months Ended
Income Taxes - PAC (Details)	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 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	0.00%	19.00%	8.00%	25.00%
Effective Income Tax Rate Reconciliation, Tax Credit, Percent	(29.00%)	(78.00%)	(29.00%)	(58.00%)
Effects of ratemaking	(2.00%)	(8.00%)	(2.00%)	(8.00%)
Other, net	1.00%	(1.00%)	0.00%	1.00%
Effective income tax rate	12.00%	86.00%	20.00%	81.00%
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	(4.00%)	(5.00%)	(4.00%)	(5.00%)
Effects of ratemaking	(1.00%)	(4.00%)	(1.00%)	(4.00%)
Other, net	(1.00%)	(3.00%)	0.00%	(2.00%)
Effective income tax rate	18.00%	13.00%	19.00%	14.00%
Production Tax Credit Carryforwards [Abstract]
Years eligible for federal renewable energy production tax credit			10 years

XML 147 R103.htm IDEA: XBRL DOCUMENT

Income Taxes - MEC (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
Income Taxes - MEC (Details) - USD ($) $ in Millions	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 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	(29.00%)	(78.00%)	(29.00%)	(58.00%)
State income tax, net of federal income tax benefit	(0.00%)	(19.00%)	(8.00%)	(25.00%)
Effects of ratemaking	(2.00%)	(8.00%)	(2.00%)	(8.00%)
Other, net	(1.00%)	1.00%	(0.00%)	(1.00%)
Effective income tax rate	12.00%	86.00%	20.00%	81.00%
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	(158.00%)	(80.00%)	(131.00%)	(104.00%)
State income tax, net of federal income tax benefit	(22.00%)	(7.00%)	(21.00%)	(8.00%)
Effects of ratemaking	(10.00%)	(9.00%)	(9.00%)	(13.00%)
Other, net	(0.00%)	(2.00%)	(1.00%)	(0.00%)
Effective income tax rate	(169.00%)	(77.00%)	(141.00%)	(104.00%)
Production Tax Credit Carryforwards [Abstract]
Years eligible for federal renewable energy production tax credit			10 years
Recognized production tax credits			$ 190	$ 108
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			(9)	$ 228
Production Tax Credit Recognition [Member] \| MidAmerican Energy Company [Member]
Production Tax Credit Carryforwards [Abstract]
Recognized production tax credits			$ 56

XML 148 R104.htm IDEA: XBRL DOCUMENT

Income Taxes - MidAmerican Funding (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 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	(29.00%)	(78.00%)	(29.00%)	(58.00%)
State income tax, net of federal income tax benefit	(0.00%)	(19.00%)	(8.00%)	(25.00%)
Effects of ratemaking	(2.00%)	(8.00%)	(2.00%)	(8.00%)
Other, net	(1.00%)	1.00%	(0.00%)	(1.00%)
Effective income tax rate	12.00%	86.00%	20.00%	81.00%
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	(171.00%)	(86.00%)	(139.00%)	(113.00%)
State income tax, net of federal income tax benefit	(25.00%)	(8.00%)	(23.00%)	(9.00%)
Effects of ratemaking	(11.00%)	(10.00%)	(9.00%)	(14.00%)
Other, net	3.00%	(1.00%)	(0.00%)	(0.00%)
Effective income tax rate	(183.00%)	(84.00%)	(150.00%)	(115.00%)
Production Tax Credit Carryforwards [Abstract]
Years eligible for federal renewable energy production tax credit			10 years
Recognized production tax credits			$ 190	$ 108
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			(8)	$ 234
Production Tax Credit Recognition [Member] \| MidAmerican Funding, LLC and Subsidiaries [Domain]
Production Tax Credit Carryforwards [Abstract]
Recognized production tax credits			$ 56

XML 149 R105.htm IDEA: XBRL DOCUMENT

Income Taxes Income Taxes - NPC (Details)	3 Months Ended		6 Months Ended
Income Taxes Income Taxes - NPC (Details)	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 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	2.00%	8.00%	2.00%	8.00%
Other, net	1.00%	(1.00%)	0.00%	1.00%
Effective income tax rate	12.00%	86.00%	20.00%	81.00%
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%	2.00%	0.00%	2.00%
Effective Income Tax Rate Reconciliation Regulatory Differences	0.00%	(1.00%)	0.00%	(1.00%)
Other, net	0.00%	1.00%	0.00%	1.00%
Effective income tax rate	21.00%	23.00%	21.00%	23.00%

XML 150 R106.htm IDEA: XBRL DOCUMENT

Income Taxes Income Taxes - SPPC (Details)	3 Months Ended		6 Months Ended
Income Taxes Income Taxes - SPPC (Details)	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 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	(2.00%)	(8.00%)	(2.00%)	(8.00%)
Other, net	1.00%	(1.00%)	0.00%	1.00%
Effective income tax rate	12.00%	86.00%	20.00%	81.00%
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%	8.00%	0.00%	3.00%
Effects of ratemaking	(1.00%)	(14.00%)	(1.00%)	1.00%
Other, net	0.00%	3.00%	0.00%	0.00%
Effective income tax rate	22.00%	46.00%	22.00%	23.00%

XML 151 R107.htm IDEA: XBRL DOCUMENT

Employee Benefit Plans (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
Employee Benefit Plans (Details) - USD ($) $ in Millions	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 3	$ 3	$ 5	$ 5
Interest cost	8	6	14	12
Expected return on plan assets	(10)	(12)	(20)	(22)
Net amortization	(1)	(3)	(3)	(6)
Net periodic benefit cost	0	(6)	(4)	(11)
Domestic Plan [Member] \| Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	4	5	8	10
Interest cost	28	26	55	52
Expected return on plan assets	(39)	(41)	(77)	(82)
Net amortization	7	7	16	15
Net periodic benefit cost	0	(3)	2	(5)
UNITED KINGDOM \| Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	4	5	8	10
Interest cost	13	14	26	28
Expected return on plan assets	(25)	(26)	(50)	(53)
Defined Benefit Plan, Accumulated Benefit Obligation, (Increase) Decrease for Settlement and Curtailment	0	24	0	24
Net amortization	9	14	18	29
Net periodic benefit cost	$ 1	$ 31	$ 2	$ 38

XML 152 R108.htm IDEA: XBRL DOCUMENT

Employee Benefit Plans - Employer Contributions (Details) - 6 months ended Jun. 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
Domestic Plan [Member] \| Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, expected contributions in current fiscal year	13
Employer contributions	6
UNITED KINGDOM \| Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, expected contributions in current fiscal year \| £			£ 44
Employer contributions	$ 28	£ 22

XML 153 R109.htm IDEA: XBRL DOCUMENT

Employee Benefit Plans Employee Benefit Plans - PacifiCorp (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 3	$ 3	$ 5	$ 5
Interest cost	8	6	14	12
Expected return on plan assets	(10)	(12)	(20)	(22)
Net amortization	(1)	(3)	(3)	(6)
Net periodic benefit cost	0	(6)	(4)	(11)
PacifiCorp [Member] \| Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	1	1	1	1
Interest cost	3	3	6	6
Expected return on plan assets	(5)	(6)	(10)	(11)
Net amortization	0	(2)	0	(3)
Net periodic benefit cost	(1)	(4)	(3)	(7)
Domestic Plan [Member] \| Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	4	5	8	10
Interest cost	28	26	55	52
Expected return on plan assets	(39)	(41)	(77)	(82)
Net amortization	7	7	16	15
Net periodic benefit cost	0	(3)	2	(5)
Domestic Plan [Member] \| PacifiCorp [Member] \| Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	0	0	0	0
Interest cost	11	10	22	21
Expected return on plan assets	(16)	(18)	(33)	(36)
Net amortization	3	4	6	7
Net periodic benefit cost	$ (2)	$ (4)	$ (5)	$ (8)

XML 154 R110.htm IDEA: XBRL DOCUMENT

Employee Benefit Plans Employee Benefit Plans - PacifiCorp - Employer Contributions (Details) $ in Millions	6 Months Ended
	Jun. 30, 2019 USD ($)
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, expected contributions in current fiscal year	$ 1
Domestic Plan [Member] \| Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, expected contributions in current fiscal year	13
Employer contributions	6
Domestic Plan [Member] \| PacifiCorp [Member] \| Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, expected contributions in current fiscal year	4
Employer contributions	$ 2

XML 155 R111.htm IDEA: XBRL DOCUMENT

Employee Benefit Plans - MEC (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Pension Plan [Member] \| Domestic Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 4	$ 5	$ 8	$ 10
Interest cost	28	26	55	52
Expected return on plan assets	(39)	(41)	(77)	(82)
Net amortization	7	7	16	15
Net periodic benefit cost	0	(3)	2	(5)
Pension Plan [Member] \| Domestic Plan [Member] \| MidAmerican Energy Company [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	1	2	3	4
Interest cost	8	7	15	14
Expected return on plan assets	(11)	(11)	(21)	(22)
Net amortization	0	0	0	1
Net periodic benefit cost	(2)	(2)	(3)	(3)
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	3	3	5	5
Interest cost	8	6	14	12
Expected return on plan assets	(10)	(12)	(20)	(22)
Net amortization	(1)	(3)	(3)	(6)
Net periodic benefit cost	0	(6)	(4)	(11)
Other Postretirement Benefits Plan [Member] \| MidAmerican Energy Company [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	2	2	3	3
Interest cost	3	2	5	4
Expected return on plan assets	(3)	(4)	(6)	(7)
Net amortization	(1)	(1)	(2)	(2)
Net periodic benefit cost	$ 1	$ (1)	$ 0	$ (2)

XML 156 R112.htm IDEA: XBRL DOCUMENT

Employee Benefit Plans Employee Benefit Plans - MEC - Employer Contributions (Details) $ in Millions	6 Months Ended
	Jun. 30, 2019 USD ($)
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, expected contributions in current fiscal year	$ 1
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
Domestic Plan [Member] \| Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, expected contributions in current fiscal year	13
Employer contributions	6
Domestic Plan [Member] \| 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	$ 3

XML 157 R113.htm IDEA: XBRL DOCUMENT

Employee Benefit Plans - NPC - Amounts Payable (Details) - Nevada Power Company [Member] - Domestic Plan [Member] - NV Energy, Inc. [Member] - USD ($) $ in Millions	Jun. 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

XML 158 R114.htm IDEA: XBRL DOCUMENT

Employee Benefit Plans - SPPC - Amounts Payable (Details) - Sierra Pacific Power Company [Member] - Domestic Plan [Member] - NV Energy, Inc. [Member] - USD ($) $ in Millions	Jun. 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

XML 159 R115.htm IDEA: XBRL DOCUMENT

Asset Retirement Obligation Asset Retirement Obligations - MEC - Asset Retirement Obligations By Type (Details) - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
MidAmerican Energy Company [Member]
Asset Retirement Obligations By Type [Line Items]
Asset Retirement Obligation	$ 812	$ 562

XML 160 R116.htm IDEA: XBRL DOCUMENT

Asset Retirement Obligation Asset Retirement Obligations - MEC - Change in Asset Retirement Obligations (Details) - MidAmerican Energy Company [Member] - USD ($) $ in Millions	6 Months Ended
	Jun. 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 Settled	(1)
Asset Retirement Obligation, Accretion Expense	14
Asset Retirement Obligation	812
Asset Retirement Obligations, Noncurrent	776	$ 552
Fossil Fuel Plant [Member]
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Asset Retirement Obligation, Revision of Estimate	$ 237

XML 161 R117.htm IDEA: XBRL DOCUMENT

Asset Retirement Obligation Asset Retirement Obligations (Details) - MidAmerican Energy Company [Member] $ in Millions	6 Months Ended
	Jun. 30, 2019 USD ($)
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

XML 162 R118.htm IDEA: XBRL DOCUMENT

Risk Management and Hedging Activities - PacifiCorp - Balance Sheet Location (Details) - PacifiCorp [Member] - Commodity derivative [Member] - USD ($) $ in Millions	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017
Derivatives, Fair Value [Line Items]
Derivative, fair value, net	$ (102)		$ (97)
Cash collateral, net receivable, offset against derivative positions	55		59
Derivative assets (liabilities), at fair value, net	(47)		(38)
Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative, fair value, net	7		27
Cash collateral, net receivable, offset against derivative positions	(1)		(2)
Derivative assets (liabilities), at fair value, net	6		25
Other Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative, fair value, net	4		3
Cash collateral, net receivable, offset against derivative positions	0		0
Derivative assets (liabilities), at fair value, net	4		3
Other Current Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative, fair value, net	(54)		(57)
Cash collateral, net receivable, offset against derivative positions	19		16
Derivative assets (liabilities), at fair value, net	(35)		(41)
Other Noncurrent Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative, fair value, net	(59)		(70)
Cash collateral, net receivable, offset against derivative positions	37		45
Derivative assets (liabilities), at fair value, net	(22)		(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	27		51
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement	(129)		(148)
Derivative, fair value, net	(102)		(97)
Net Regulatory Asset (Liability), Unrealized Loss (Gain) On Derivative Contracts	101	$ 78	96	$ 116	$ 122	$ 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	13		36
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement	(6)		(9)
Derivative, fair value, net	7		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	5		4
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement	(1)		(1)
Derivative, fair value, net	4		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	9		10
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement	(63)		(67)
Derivative, fair value, net	(54)		(57)
Not Designated as Hedging Instrument [Member] \| Other Noncurrent Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative asset, fair value, gross asset including not subject to master netting arrangement	0		1
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement	(59)		(71)
Derivative, fair value, net	$ (59)		$ (70)

XML 163 R119.htm IDEA: XBRL DOCUMENT

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		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Regulatory Assets (Liabilities), Net, Unrealized Loss (Gain), Net, on Derivative Instruments [Line Items]
Beginning balance	$ 78	$ 122	$ 96	$ 101
Changes in fair value recognized in net regulatory assets	26	6	(28)	34
Net (losses) gains reclassified to operating revenue	6	(1)	(16)	6
Net Gains (Losses) Reclassified To Cost Of Domestic Regulated Electric	(9)	(11)	49	(25)
Ending balance	$ 101	$ 116	$ 101	$ 116

XML 164 R120.htm IDEA: XBRL DOCUMENT

Risk Management and Hedging Activities - PacifiCorp - Derivative Contract Volumes (Details) - PacifiCorp [Member] - Commodity derivative [Member] MWh in Millions, Dth in Millions	Jun. 30, 2019 Dth MWh	Dec. 31, 2018 Dth MWh
Electricity sales, net
Notional Amounts of Outstanding Derivative Positions [Line Items]
Derivative, nonmonetary notional amount \| MWh	2	6
Natural gas purchases
Notional Amounts of Outstanding Derivative Positions [Line Items]
Derivative, nonmonetary notional amount \| Dth	116	117

XML 165 R121.htm IDEA: XBRL DOCUMENT

Risk Management and Hedging Activities - PacifiCorp - Collateral and Contingent Features (Details) - PacifiCorp [Member] - Commodity derivative [Member] - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
Derivative [Line Items]
Derivative, net liability position, aggregate fair value	$ 108	$ 113
Collateral already posted, aggregate fair value	56	61
Additional collateral, aggregate fair value	$ 36	$ 35

XML 166 R122.htm IDEA: XBRL DOCUMENT

Fair Value Measurements (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
Fair Value Measurements (Details) - USD ($) $ in Millions	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 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	4,266		4,266			3,114
Derivative liability, fair value, gross asset and right to reclaim cash, offset	117		117			111
Derivative liabilities	(120)		(120)			(111)
Cash collateral, net receivable, offset against derivative positions	92		92			59
Recurring [Member] \| Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value disclosure	2,995		2,995			2,423
Derivative liabilities	(4)		(4)			(1)
Recurring [Member] \| Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value disclosure	1,165		1,165			625
Derivative liabilities	(211)		(211)			(212)
Recurring [Member] \| Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value disclosure	131		131			118
Derivative liabilities	(22)		(22)			(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	1,065		1,065			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	1,065		1,065			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	951		951			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	951		951			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	193		193			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	193		193			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	4		4			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	4		4			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	49		49			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	49		49			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	2		2			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	2		2			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	311		311			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	311		311			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	1,358		1,358			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	1,358		1,358			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	119		119			148
Derivative liability, fair value, gross asset and right to reclaim cash, offset	117		117			111
Derivative liabilities	(92)		(92)			(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	(2)		(2)			(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	38		38			91
Derivative liability, fair value, gross liability including not subject to master netting arrangement	(187)		(187)			(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	106		106			108
Derivative liability, fair value, gross liability including not subject to master netting arrangement	(20)		(20)			(9)
Interest Rate Contract [Member] \| Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	31		31			24
Derivative liabilities	(28)		(28)			(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	(2)		(2)			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	6		6			13
Derivative liability, fair value, gross liability including not subject to master netting arrangement	(24)		(24)			(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	25		25			10
Derivative liability, fair value, gross liability including not subject to master netting arrangement	(2)		(2)			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	86	$ 83	86	$ 83	$ 86	99	$ 81	$ 94
Fair Value, Assets and Liabilities Measured on Recurring Basis, Gain (Loss) Included in Earnings	(8)	(4)	(5)	(4)
Fair Value, Measurements with Unobservable Inputs Reconciliation, Recurring Basis, Gain (Loss) Included In Regulatory Assets and Liabilities, Net	12	5	23	14
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases	3	0	4	1
Fair Value, Measurements With Unobservable Inputs Reconciliation, Recurring Basis, Assets and Liability, Net, Settlements	(2)	(2)	(2)	2
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	23	17	23	17	$ 18	$ 10	$ 16	$ 9
Fair Value, Assets and Liabilities Measured on Recurring Basis, Gain (Loss) Included in Earnings	(94)	(56)	(147)	(86)
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	$ 89	$ 55	$ 134	$ 78

XML 167 R123.htm IDEA: XBRL DOCUMENT

Fair Value Measurements - Level 3 (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Commodity derivative [Member]
Fair Value, Assets (Liabilities), Net, Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	$ 86	$ 81	$ 99	$ 94
Changes included in earnings	8	4	5	4
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Other Comprehensive Income (Loss)	1	(1)	1	0
Changes in fair value recognized in net regulatory assets	(12)	(5)	(23)	(14)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases	3	0	4	1
Settlements	2	2	2	(2)
Ending balance	86	83	86	83
Interest Rate Lock Commitments [Member]
Fair Value, Assets (Liabilities), Net, Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	18	16	10	9
Changes included in earnings	94	56	147	86
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	(89)	(55)	(134)	(78)
Ending balance	$ 23	$ 17	$ 23	$ 17

XML 168 R124.htm IDEA: XBRL DOCUMENT

Fair Value Measurements - Debt (Details) - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, carrying value	$ 38,096	$ 36,250
Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, fair value	$ 43,822	$ 38,874

XML 169 R125.htm IDEA: XBRL DOCUMENT

Fair Value Measurements - PacifiCorp (Details) - USD ($) $ in Millions	Jun. 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	4,266	3,114
Derivative liability, fair value, gross asset and right to reclaim cash, offset	117	111
Derivative Liability	(120)	(111)
Cash collateral, net receivable, offset against derivative positions	92	59
Recurring [Member] \| Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value disclosure	2,995	2,423
Derivative Liability	(4)	(1)
Recurring [Member] \| Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value disclosure	1,165	625
Derivative Liability	(211)	(212)
Recurring [Member] \| Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value disclosure	131	118
Derivative Liability	(22)	(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	119	148
Derivative liability, fair value, gross asset and right to reclaim cash, offset	117	111
Derivative Liability	(92)	(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	(2)	(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	38	91
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement	(187)	(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	106	108
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement	(20)	(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	951	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	951	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	477	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	467	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	27	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	55	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	(17)	(23)
Derivative assets	10	28
Derivative liability, fair value, gross asset and right to reclaim cash, offset	72	82
Derivative Liability	(57)	(66)
Cash collateral, net receivable, offset against derivative positions	55	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	27	51
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement	(129)	(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	442	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	442	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

XML 170 R126.htm IDEA: XBRL DOCUMENT

Fair Value Measurements - PacifiCorp - Debt (Details) - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, carrying value	$ 38,096	$ 36,250
Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, fair value	43,822	38,874
PacifiCorp [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, carrying value	7,656	7,015
PacifiCorp [Member] \| Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, fair value	$ 9,141	$ 7,833

XML 171 R127.htm IDEA: XBRL DOCUMENT

Fair Value Measurements - MEC (Details) - Recurring [Member] - USD ($)
$ in Millions

Jun. 30, 2019

Dec. 31, 2018

Cash collateral, net receivable, offset against derivative positions

$ 92

$ 59

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

4,266

3,114

117

111

Money market mutual funds [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

United States government obligations [Member]

951

409

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

International government obligations [Member]

193

187

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Corporate obligations [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Municipal obligations [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

US Government-sponsored Enterprises Debt Securities [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

United States companies [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

International companies [Member]

311

256

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Investment funds [Member]

1,358

1,441

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

182

128

Level 1 [Member]

Level 1 [Member] | Money market mutual funds [Member]

2,995

2,423

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Level 1 [Member] | United States government obligations [Member]

951

409

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Level 1 [Member] | International government obligations [Member]

193

187

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Level 1 [Member] | Corporate obligations [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Level 1 [Member] | Municipal obligations [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Level 1 [Member] | US Government-sponsored Enterprises Debt Securities [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Level 1 [Member] | United States companies [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Level 1 [Member] | International companies [Member]

311

256

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Level 1 [Member] | Investment funds [Member]

1,358

1,441

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

182

128

Level 2 [Member]

Level 2 [Member] | Money market mutual funds [Member]

1,165

625

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Level 2 [Member] | United States government obligations [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Level 2 [Member] | International government obligations [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Level 2 [Member] | Corporate obligations [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Level 2 [Member] | Municipal obligations [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Level 2 [Member] | US Government-sponsored Enterprises Debt Securities [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Level 2 [Member] | United States companies [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Level 2 [Member] | International companies [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Level 2 [Member] | Investment funds [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Level 3 [Member]

Level 3 [Member] | Money market mutual funds [Member]

131

118

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Level 3 [Member] | United States government obligations [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Level 3 [Member] | International government obligations [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Level 3 [Member] | Corporate obligations [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Level 3 [Member] | Municipal obligations [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Level 3 [Member] | US Government-sponsored Enterprises Debt Securities [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Level 3 [Member] | United States companies [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Level 3 [Member] | International companies [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Level 3 [Member] | Investment funds [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

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

117

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

Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement

(2)

(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

Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement

(187)

(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

106

108

Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement

(20)

(9)

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Cash collateral, net receivable, offset against derivative positions

MidAmerican Energy Company [Member] | Money market mutual funds [Member]

745

517

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

MidAmerican Energy Company [Member] | United States government obligations [Member]

^[1]

165

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

MidAmerican Energy Company [Member] | International government obligations [Member]

193

187

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

MidAmerican Energy Company [Member] | Corporate obligations [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

MidAmerican Energy Company [Member] | Municipal obligations [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

MidAmerican Energy Company [Member] | US Government-sponsored Enterprises Debt Securities [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

MidAmerican Energy Company [Member] | United States companies [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

MidAmerican Energy Company [Member] | International companies [Member]

311

256

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

MidAmerican Energy Company [Member] | Investment funds [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

MidAmerican Energy Company [Member] | Level 1 [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

MidAmerican Energy Company [Member] | Level 1 [Member] | Money market mutual funds [Member]

688

461

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

MidAmerican Energy Company [Member] | Level 1 [Member] | United States government obligations [Member]

^[1]

165

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

MidAmerican Energy Company [Member] | Level 1 [Member] | International government obligations [Member]

193

187

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

MidAmerican Energy Company [Member] | Level 1 [Member] | Corporate obligations [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

MidAmerican Energy Company [Member] | Level 1 [Member] | Municipal obligations [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

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]

MidAmerican Energy Company [Member] | Level 1 [Member] | United States companies [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

MidAmerican Energy Company [Member] | Level 1 [Member] | International companies [Member]

311

256

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

MidAmerican Energy Company [Member] | Level 1 [Member] | Investment funds [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

MidAmerican Energy Company [Member] | Level 2 [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

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]

MidAmerican Energy Company [Member] | Level 2 [Member] | United States government obligations [Member]

^[1]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

MidAmerican Energy Company [Member] | Level 2 [Member] | International government obligations [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

MidAmerican Energy Company [Member] | Level 2 [Member] | Corporate obligations [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

MidAmerican Energy Company [Member] | Level 2 [Member] | Municipal obligations [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

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]

MidAmerican Energy Company [Member] | Level 2 [Member] | United States companies [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

MidAmerican Energy Company [Member] | Level 2 [Member] | International companies [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

MidAmerican Energy Company [Member] | Level 2 [Member] | Investment funds [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

MidAmerican Energy Company [Member] | Level 3 [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

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]

MidAmerican Energy Company [Member] | Level 3 [Member] | United States government obligations [Member]

^[1]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

MidAmerican Energy Company [Member] | Level 3 [Member] | International government obligations [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

MidAmerican Energy Company [Member] | Level 3 [Member] | Corporate obligations [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

MidAmerican Energy Company [Member] | Level 3 [Member] | Municipal obligations [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

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]

MidAmerican Energy Company [Member] | Level 3 [Member] | United States companies [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

MidAmerican Energy Company [Member] | Level 3 [Member] | International companies [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

MidAmerican Energy Company [Member] | Level 3 [Member] | Investment funds [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

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

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]

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

Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement

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

Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement

(5)

(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

Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement

$ (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 $- million as of June 30, 2019 and December 31, 2018, respectively.

XML 172 R128.htm IDEA: XBRL DOCUMENT

Fair Value Measurements - MEC - Debt (Details) - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, carrying value	$ 38,096	$ 36,250
Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, fair value	43,822	38,874
MidAmerican Energy Company [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, carrying value	6,341	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	$ 7,213

XML 173 R129.htm IDEA: XBRL DOCUMENT

Fair Value Measurements - MidAmerican Funding - Debt (Details) - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, carrying value	$ 38,096	$ 36,250
Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, fair value	43,822	38,874
MidAmerican Funding, LLC and Subsidiaries [Domain]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, carrying value	6,581	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	$ 7,528

XML 174 R130.htm IDEA: XBRL DOCUMENT

Fair Value Measurements - NPC (Details) - Recurring [Member] - USD ($)
$ in Millions

Jun. 30, 2019

Dec. 31, 2018

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

$ 4,266

$ 3,114

Level 1 [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

2,995

2,423

Level 2 [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

1,165

625

Level 3 [Member]

Money market mutual funds [Member]

131

118

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Money market mutual funds [Member] | Level 1 [Member]

951

409

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Money market mutual funds [Member] | Level 2 [Member]

951

409

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Money market mutual funds [Member] | Level 3 [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Investment funds [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Investment funds [Member] | Level 1 [Member]

182

128

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Investment funds [Member] | Level 2 [Member]

182

128

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Investment funds [Member] | Level 3 [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

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

Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement

(2)

(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

Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement

(187)

(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

106

108

Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement

(20)

(9)

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Nevada Power Company [Member] | Level 1 [Member]

112

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Nevada Power Company [Member] | Level 2 [Member]

105

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Nevada Power Company [Member] | Level 3 [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Nevada Power Company [Member] | Money market mutual funds [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Nevada Power Company [Member] | Money market mutual funds [Member] | Level 1 [Member]

^[1]

104

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Nevada Power Company [Member] | Money market mutual funds [Member] | Level 2 [Member]

^[1]

104

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Nevada Power Company [Member] | Money market mutual funds [Member] | Level 3 [Member]

^[1]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Nevada Power Company [Member] | Investment funds [Member]

^[1]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Nevada Power Company [Member] | Investment funds [Member] | Level 1 [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Nevada Power Company [Member] | Investment funds [Member] | Level 2 [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Nevada Power Company [Member] | Investment funds [Member] | Level 3 [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

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

Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement

(11)

(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

Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement

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

Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement

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

Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement

$ (11)

$ (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.

XML 175 R131.htm IDEA: XBRL DOCUMENT

Fair Value Measurements - NPC - Level 3 (Details) - Nevada Power Company [Member] - Commodity [Member] - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Fair Value, Assets (Liabilities), Net, Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance	$ (5)	$ (8)	$ 3	$ (3)
Fair Value, Measurements with Unobservable Inputs Reconciliation, Recurring Basis, Gain (Loss) Included In Regulatory Assets and Liabilities, Net	8	3	17	8
Fair Value, Measurements With Unobservable Inputs Reconciliation, Recurring Basis, Assets and Liability, Net, Settlements	(2)	(2)	(3)	(2)
Ending balance	$ (11)	$ (9)	$ (11)	$ (9)

XML 176 R132.htm IDEA: XBRL DOCUMENT

Fair Value Measurements - NPC - Debt (Details) - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, carrying value	$ 38,096	$ 36,250
Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, fair value	43,822	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	$ 2,787	$ 2,651

XML 177 R133.htm IDEA: XBRL DOCUMENT

Fair Value Measurements Fair Value Measurements - SPPC (Details) - Recurring [Member] - USD ($)
$ in Millions

Jun. 30, 2019

Dec. 31, 2018

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

$ 4,266

$ 3,114

Level 1 [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

2,995

2,423

Level 2 [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

1,165

625

Level 3 [Member]

Money market mutual funds [Member]

131

118

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Money market mutual funds [Member] | Level 1 [Member]

951

409

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Money market mutual funds [Member] | Level 2 [Member]

951

409

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Money market mutual funds [Member] | Level 3 [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Investment funds [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Investment funds [Member] | Level 1 [Member]

182

128

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Investment funds [Member] | Level 2 [Member]

182

128

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Investment funds [Member] | Level 3 [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

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

Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement

(2)

(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

Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement

(187)

(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

106

108

Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement

(20)

(9)

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Sierra Pacific Power Company [Member] | Level 1 [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Sierra Pacific Power Company [Member] | Level 2 [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Sierra Pacific Power Company [Member] | Level 3 [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Sierra Pacific Power Company [Member] | Money market mutual funds [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Sierra Pacific Power Company [Member] | Money market mutual funds [Member] | Level 1 [Member]

^[1]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Sierra Pacific Power Company [Member] | Money market mutual funds [Member] | Level 2 [Member]

^[1]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Sierra Pacific Power Company [Member] | Money market mutual funds [Member] | Level 3 [Member]

^[1]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Sierra Pacific Power Company [Member] | Investment funds [Member]

^[1]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Sierra Pacific Power Company [Member] | Investment funds [Member] | Level 1 [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Sierra Pacific Power Company [Member] | Investment funds [Member] | Level 2 [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Sierra Pacific Power Company [Member] | Investment funds [Member] | Level 3 [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

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

Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement

(3)

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

Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement

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

Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement

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

$ (3)

[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.

XML 178 R134.htm IDEA: XBRL DOCUMENT

Fair Value Measurements - SPPC - Debt (Details) - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, carrying value	$ 38,096	$ 36,250
Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, fair value	43,822	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	$ 1,240	$ 1,167

XML 179 R135.htm IDEA: XBRL DOCUMENT

Commitments and Contingencies - Commitments (Details) - USD ($)
$ in Millions

6 Months Ended

Jun. 30, 2019

Dec. 31, 2018

ContractualObligationFiscalYearMaturityScheduleTable [Line Items]

Property, Plant and Equipment [Abstract]

^[1]

$ 692

Equity Method Investments

$ 2,595

2,440

69,939

68,087

ContractualObligationFiscalYearMaturityScheduleTable [Line Items]

PacifiCorp [Member] | Klamath Hydroelectric System [Member]

$ 20

ContractualObligationFiscalYearMaturityScheduleTable [Line Items]

Dam removal cost limit

200

PacifiCorp [Member] | Klamath Hydroelectric System [Member] | CALIFORNIA

ContractualObligationFiscalYearMaturityScheduleTable [Line Items]

Dam removal cost limit

Additional dam removal costs, California bond measure

250

Capital Addition Purchase Commitments [Member] | PacifiCorp [Member]

ContractualObligationFiscalYearMaturityScheduleTable [Line Items]

Maintenance, service and other contracts [Member] | PacifiCorp and MidAmerican Energy [Member]

486

ContractualObligationFiscalYearMaturityScheduleTable [Line Items]

Maintenance, service and other contracts [Member] | MidAmerican Energy Company [Member]

474

ContractualObligationFiscalYearMaturityScheduleTable [Line Items]

Maintenance, service and other contracts [Member] | PacifiCorp [Member]

301

ContractualObligationFiscalYearMaturityScheduleTable [Line Items]

Counterparty Bankruptcy [Member] | Topaz [Member]

$ 173

ContractualObligationFiscalYearMaturityScheduleTable [Line Items]

Entity Legal Form

Property, Plant and Equipment [Abstract]

Revenue, Performance Obligation, Description of Payment Terms

Counterparty Bankruptcy [Member] | Agua Caliente [Member]

$ 1,100

Non-Recourse Debt

$ 900

ContractualObligationFiscalYearMaturityScheduleTable [Line Items]

Equity Method Investment, Ownership Percentage

49.00%

Property, Plant and Equipment [Abstract]

Revenue, Performance Obligation, Description of Payment Terms

Equity Method Investments

$ 56

Non-Recourse Debt

800

Easements [Member] | PacifiCorp and MidAmerican Energy [Member]

ContractualObligationFiscalYearMaturityScheduleTable [Line Items]

Easements [Member] | MidAmerican Energy Company [Member]

392

ContractualObligationFiscalYearMaturityScheduleTable [Line Items]

Easements [Member] | PacifiCorp [Member]

217

ContractualObligationFiscalYearMaturityScheduleTable [Line Items]

$ 175

[1]	(1) Amounts included for comparability and accounted for in accordance with ASC 840, "Leases".

- Details

Name:	bhe_HydroelectricSystemNameAxis=bhe_KlamathHydroelectricSystemMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

XML 180 R136.htm IDEA: XBRL DOCUMENT

Commitments and Contingencies Commitments and Contingencies - PAC - Commitments (Details) - PacifiCorp [Member] $ in Millions	Jun. 30, 2019 USD ($)
Capital Addition Purchase Commitments [Member]
ContractualObligationFiscalYearMaturityScheduleTable [Line Items]
Purchase Obligation	$ 486
Maintenance, service and other contracts [Member]
ContractualObligationFiscalYearMaturityScheduleTable [Line Items]
Purchase Obligation	173
Easements [Member]
ContractualObligationFiscalYearMaturityScheduleTable [Line Items]
Operating Leases, Future Minimum Payments Due	$ 175

XML 181 R137.htm IDEA: XBRL DOCUMENT

Commitments and Contingencies Commitments and Contingencies - PacifiCorp - Hydroelectric (Details) - PacifiCorp [Member] - Klamath Hydroelectric System [Member] $ in Millions	6 Months Ended
	Jun. 30, 2019 USD ($)
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

XML 182 R138.htm IDEA: XBRL DOCUMENT

Commitments and Contingencies Commitments and Contingencies - MEC- Commitments (Details) - MidAmerican Energy Company [Member] $ in Millions	Jun. 30, 2019 USD ($)
Maintenance, service and other contracts [Member]
ContractualObligationFiscalYearMaturityScheduleTable [Line Items]
Purchase Obligation	$ 301
Easements [Member]
ContractualObligationFiscalYearMaturityScheduleTable [Line Items]
Operating Leases, Future Minimum Payments Due	$ 217

XML 183 R139.htm IDEA: XBRL DOCUMENT

Commitments and Contingencies Commitments and Contingencies - MEC - Transmission Rates (Details) - MidAmerican Energy Company [Member] - Electric Transmission [Member] $ in Millions	6 Months Ended
	Jun. 30, 2019 USD ($)
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%

XML 184 R140.htm IDEA: XBRL DOCUMENT

Revenue from Contracts with Customers Revenue from Contracts with Customers (Details) - USD ($)
$ in Millions

3 Months Ended

6 Months Ended

Jun. 30, 2019

Jun. 30, 2018

Jun. 30, 2019

Jun. 30, 2018

Revenue from Contract with Customer, Excluding Assessed Tax

$ 3,429

$ 3,564

$ 7,116

$ 7,088

Non-contracts with customer revenue [Member]

4,894

4,993

9,504

9,433

Electricity and natural gas [Member]

138

156

276

311

3,567

3,720

7,392

7,399

Revenue from Contract with Customer, Excluding Assessed Tax

1,143

1,154

2,382

2,294

PacifiCorp [Member] | Non-contracts with customer revenue [Member]

1,167

1,193

2,426

2,377

MidAmerican Funding [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

653

710

1,488

1,451

MidAmerican Funding [Member] | Non-contracts with customer revenue [Member]

660

718

1,502

1,465

NV Energy, Inc. [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

713

743

1,320

1,353

NV Energy, Inc. [Member] | Non-contracts with customer revenue [Member]

721

750

1,335

1,367

Northern Powergrid Holdings [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

219

226

457

486

Northern Powergrid Holdings [Member] | Non-contracts with customer revenue [Member]

243

246

506

524

BHE Pipeline Group [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

212

236

584

610

BHE Pipeline Group [Member] | Non-contracts with customer revenue [Member]

212

236

583

612

BHE Transmission [Member]

^[1]

(1)

^[1]

Revenue from Contract with Customer, Excluding Assessed Tax

175

177

343

357

BHE Transmission [Member] | Non-contracts with customer revenue [Member]

175

177

343

357

BHE Renewables [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

197

186

323

303

BHE Renewables [Member] | Non-contracts with customer revenue [Member]

249

246

416

400

Berkshire Hathaway Energy And Other [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

117

^[2]

132

^[2]

219

^[2]

234

Berkshire Hathaway Energy And Other [Member] | Non-contracts with customer revenue [Member]

140

^[2]

154

^[2]

281

^[2]

297

Regulated Operation [Member]

^[2]

Revenue from Contract with Customer, Excluding Assessed Tax

3,063

3,201

6,470

6,453

Regulated Operation [Member] | Regulated retail electric [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

2,232

2,311

4,388

4,332

Regulated Operation [Member] | Regulated retail gas [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

116

118

413

404

Regulated Operation [Member] | Regulated wholesale [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

101

242

226

Regulated Operation [Member] | Regulated transmission and distribution [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

441

459

903

946

Regulated Operation [Member] | Regulated interstate pipeline [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

188

211

523

544

Regulated Operation [Member] | Other customer revenue [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

Regulated Operation [Member] | PacifiCorp [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

1,143

1,154

2,382

2,294

Regulated Operation [Member] | PacifiCorp [Member] | Regulated retail electric [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

1,107

1,115

2,293

2,211

Regulated Operation [Member] | PacifiCorp [Member] | Regulated retail gas [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

Regulated Operation [Member] | PacifiCorp [Member] | Regulated wholesale [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

^[3]

Regulated Operation [Member] | PacifiCorp [Member] | Regulated transmission and distribution [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

Regulated Operation [Member] | PacifiCorp [Member] | Regulated interstate pipeline [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

Regulated Operation [Member] | PacifiCorp [Member] | Other customer revenue [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

Regulated Operation [Member] | MidAmerican Funding [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

643

705

1,472

1,446

Regulated Operation [Member] | MidAmerican Funding [Member] | Regulated retail electric [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

467

505

910

891

Regulated Operation [Member] | MidAmerican Funding [Member] | Regulated retail gas [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

355

345

Regulated Operation [Member] | MidAmerican Funding [Member] | Regulated wholesale [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

176

180

Regulated Operation [Member] | MidAmerican Funding [Member] | Regulated transmission and distribution [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

Regulated Operation [Member] | MidAmerican Funding [Member] | Regulated interstate pipeline [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

Regulated Operation [Member] | MidAmerican Funding [Member] | Other customer revenue [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

Regulated Operation [Member] | NV Energy, Inc. [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

713

742

1,320

1,352

Regulated Operation [Member] | NV Energy, Inc. [Member] | Regulated retail electric [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

658

691

1,185

1,230

Regulated Operation [Member] | NV Energy, Inc. [Member] | Regulated retail gas [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

Regulated Operation [Member] | NV Energy, Inc. [Member] | Regulated wholesale [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

Regulated Operation [Member] | NV Energy, Inc. [Member] | Regulated transmission and distribution [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

Regulated Operation [Member] | NV Energy, Inc. [Member] | Regulated interstate pipeline [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

Regulated Operation [Member] | NV Energy, Inc. [Member] | Other customer revenue [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

Regulated Operation [Member] | Northern Powergrid Holdings [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

209

216

439

465

Regulated Operation [Member] | Northern Powergrid Holdings [Member] | Regulated retail electric [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

Regulated Operation [Member] | Northern Powergrid Holdings [Member] | Regulated retail gas [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

Regulated Operation [Member] | Northern Powergrid Holdings [Member] | Regulated wholesale [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

Regulated Operation [Member] | Northern Powergrid Holdings [Member] | Regulated transmission and distribution [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

209

216

439

465

Regulated Operation [Member] | Northern Powergrid Holdings [Member] | Regulated interstate pipeline [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

Regulated Operation [Member] | Northern Powergrid Holdings [Member] | Other customer revenue [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

Regulated Operation [Member] | BHE Pipeline Group [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

212

236

584

610

Regulated Operation [Member] | BHE Pipeline Group [Member] | Regulated retail electric [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

Regulated Operation [Member] | BHE Pipeline Group [Member] | Regulated retail gas [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

Regulated Operation [Member] | BHE Pipeline Group [Member] | Regulated wholesale [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

Regulated Operation [Member] | BHE Pipeline Group [Member] | Regulated transmission and distribution [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

Regulated Operation [Member] | BHE Pipeline Group [Member] | Regulated interstate pipeline [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

212

236

584

610

Regulated Operation [Member] | BHE Pipeline Group [Member] | Other customer revenue [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

Regulated Operation [Member] | BHE Transmission [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

168

174

335

354

Regulated Operation [Member] | BHE Transmission [Member] | Regulated retail electric [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

Regulated Operation [Member] | BHE Transmission [Member] | Regulated retail gas [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

Regulated Operation [Member] | BHE Transmission [Member] | Regulated wholesale [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

Regulated Operation [Member] | BHE Transmission [Member] | Regulated transmission and distribution [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

168

174

335

354

Regulated Operation [Member] | BHE Transmission [Member] | Regulated interstate pipeline [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

Regulated Operation [Member] | BHE Transmission [Member] | Other customer revenue [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

Regulated Operation [Member] | BHE Renewables [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

Regulated Operation [Member] | BHE Renewables [Member] | Regulated retail electric [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

Regulated Operation [Member] | BHE Renewables [Member] | Regulated retail gas [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

Regulated Operation [Member] | BHE Renewables [Member] | Regulated wholesale [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

Regulated Operation [Member] | BHE Renewables [Member] | Regulated transmission and distribution [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

Regulated Operation [Member] | BHE Renewables [Member] | Regulated interstate pipeline [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

Regulated Operation [Member] | BHE Renewables [Member] | Other customer revenue [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

Regulated Operation [Member] | Berkshire Hathaway Energy And Other [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

(25)

^[2]

(26)

^[2]

(62)

^[2]

(68)

Regulated Operation [Member] | Berkshire Hathaway Energy And Other [Member] | Regulated retail electric [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

^[2]

Regulated Operation [Member] | Berkshire Hathaway Energy And Other [Member] | Regulated retail gas [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

^[2]

Regulated Operation [Member] | Berkshire Hathaway Energy And Other [Member] | Regulated wholesale [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

(1)

^[2]

(1)

^[2]

(1)

^[2]

(2)

Regulated Operation [Member] | Berkshire Hathaway Energy And Other [Member] | Regulated transmission and distribution [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

^[2]

Regulated Operation [Member] | Berkshire Hathaway Energy And Other [Member] | Regulated interstate pipeline [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

(24)

^[2]

(25)

^[2]

(61)

^[2]

(66)

Regulated Operation [Member] | Berkshire Hathaway Energy And Other [Member] | Other customer revenue [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

^[2]

Unregulated Operation [Member] | Nonregulated products and services [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

366

363

646

635

Unregulated Operation [Member] | PacifiCorp [Member] | Nonregulated products and services [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

Unregulated Operation [Member] | MidAmerican Funding [Member] | Nonregulated products and services [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

Unregulated Operation [Member] | NV Energy, Inc. [Member] | Nonregulated products and services [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

Unregulated Operation [Member] | Northern Powergrid Holdings [Member] | Nonregulated products and services [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

Unregulated Operation [Member] | BHE Pipeline Group [Member] | Nonregulated products and services [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

Unregulated Operation [Member] | BHE Transmission [Member] | Nonregulated products and services [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

Unregulated Operation [Member] | BHE Renewables [Member] | Nonregulated products and services [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

197

186

323

303

Unregulated Operation [Member] | Berkshire Hathaway Energy And Other [Member] | Nonregulated products and services [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

142

^[2]

158

^[2]

281

^[2]

302

PacifiCorp [Member] | Non-contracts with customer revenue [Member]

1,167

1,193

2,426

2,377

PacifiCorp [Member] | Regulated Operation [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

1,143

1,154

2,382

2,294

PacifiCorp [Member] | Regulated Operation [Member] | Regulated retail electric [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

1,085

1,095

2,255

2,172

PacifiCorp [Member] | Regulated Operation [Member] | Regulated wholesale [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

PacifiCorp [Member] | Regulated Operation [Member] | Regulated transmission and distribution [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

PacifiCorp [Member] | Regulated Operation [Member] | Other customer revenue [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

$ 22

$ 20

$ 38

$ 39

[1]	ncludes 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)I

XML 185 R141.htm IDEA: XBRL DOCUMENT

Revenue from Contracts with Customers Revenue from Contracts with Customers - Real Estate Services (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 3,429	$ 3,564	$ 7,116	$ 7,088
Operating revenue	4,894	4,993	9,504	9,433
Residential real estate brokerage and mortgage businesses [Member]
Disaggregation of Revenue [Line Items]
Operating revenue	1,327	1,273	2,112	2,034
Non-contracts with customer revenue [Member]
Disaggregation of Revenue [Line Items]
Operating revenue	138	156	276	311
HomeServices [Member]
Disaggregation of Revenue [Line Items]
Operating revenue	1,327	1,273	2,112	2,034
HomeServices [Member] \| Residential real estate brokerage [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	1,204	1,168	1,915	1,853
HomeServices [Member] \| Residential real estate brokerage and mortgage businesses [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	1,223	1,187	1,948	1,887
Operating revenue	1,327	1,273	2,112	2,034
HomeServices [Member] \| Real estate franchise [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	19	19	33	34
HomeServices [Member] \| Non-contracts with customer revenue [Member]
Disaggregation of Revenue [Line Items]
Operating revenue	$ 104	$ 86	$ 164	$ 147

XML 186 R142.htm IDEA: XBRL DOCUMENT

Revenue from Contracts with Customers Revenue from Contracts with Customers - Remaining Performance Obligation (Details) - BHE Pipeline Group [Member] $ in Millions	Jun. 30, 2019 USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-07-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	$ 935
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-07-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	5,411
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	$ 6,346

XML 187 R143.htm IDEA: XBRL DOCUMENT

Revenue from Contracts with Customers Revenue from Contracts with Customers - PAC - Customer Revenue (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 3,429	$ 3,564	$ 7,116	$ 7,088
Operating revenue	4,894	4,993	9,504	9,433
Non-contracts with customer revenue [Member]
Disaggregation of Revenue [Line Items]
Operating revenue	138	156	276	311
Regulated Operation [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	3,063	3,201	6,470	6,453
Regulated Operation [Member] \| Regulated retail electric [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	2,232	2,311	4,388	4,332
Regulated Operation [Member] \| Regulated wholesale [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	86	101	242	226
Regulated Operation [Member] \| Regulated transmission and distribution [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	441	459	903	946
Regulated Operation [Member] \| Other customer revenue [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0	1	1	1
PacifiCorp [Member]
Disaggregation of Revenue [Line Items]
Operating revenue	1,167	1,193	2,426	2,377
PacifiCorp [Member] \| Non-contracts with customer revenue [Member]
Disaggregation of Revenue [Line Items]
Operating revenue	24	39	44	83
PacifiCorp [Member] \| Regulated Operation [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	1,143	1,154	2,382	2,294
PacifiCorp [Member] \| Regulated Operation [Member] \| Regulated retail electric [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	1,085	1,095	2,255	2,172
PacifiCorp [Member] \| Regulated Operation [Member] \| Regulated retail electric [Member] \| Residential [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	349	365	838	806
PacifiCorp [Member] \| Regulated Operation [Member] \| Regulated retail electric [Member] \| Commercial [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	373	369	733	711
PacifiCorp [Member] \| Regulated Operation [Member] \| Regulated retail electric [Member] \| Industrial [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	289	288	581	557
PacifiCorp [Member] \| Regulated Operation [Member] \| Regulated retail electric [Member] \| Other [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	74	73	103	98
PacifiCorp [Member] \| Regulated Operation [Member] \| Regulated wholesale [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	11	9	39	31
PacifiCorp [Member] \| Regulated Operation [Member] \| Regulated transmission and distribution [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	25	30	50	52
PacifiCorp [Member] \| Regulated Operation [Member] \| Other customer revenue [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 22	$ 20	$ 38	$ 39

XML 188 R144.htm IDEA: XBRL DOCUMENT

Revenue from Contracts with Customers Revenue from Contracts with Customers - MEC (Details) - USD ($)
$ in Millions

3 Months Ended

6 Months Ended

Jun. 30, 2019

Jun. 30, 2018

Jun. 30, 2019

Jun. 30, 2018

Revenue from Contract with Customer, Excluding Assessed Tax

$ 3,429

$ 3,564

$ 7,116

$ 7,088

Non-contracts with customer revenue [Member]

4,894

4,993

9,504

9,433

Regulated Operation [Member]

138

156

276

311

Revenue from Contract with Customer, Excluding Assessed Tax

3,063

3,201

6,470

6,453

Regulated Operation [Member] | Regulated retail electric [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

2,232

2,311

4,388

4,332

Regulated Operation [Member] | Regulated retail gas [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

116

118

413

404

Regulated Operation [Member] | Regulated wholesale [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

101

242

226

Regulated Operation [Member] | Other customer revenue [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

Revenue from Contract with Customer, Excluding Assessed Tax

651

709

1,486

1,449

MidAmerican Energy Company [Member] | Non-contracts with customer revenue [Member]

659

717

1,501

1,463

MidAmerican Energy Company [Member] | Regulated electric

MidAmerican Energy Company [Member] | Regulated natural gas

538

589

1,080

1,058

MidAmerican Energy Company [Member] | Corporate and Other [Member]

111

127

406

402

MidAmerican Energy Company [Member] | Regulated Operation [Member] | Regulated retail [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

561

608

1,265

1,237

MidAmerican Energy Company [Member] | Regulated Operation [Member] | Regulated retail [Member] | Residential [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

214

238

560

567

MidAmerican Energy Company [Member] | Regulated Operation [Member] | Regulated retail [Member] | Commercial [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

101

239

234

MidAmerican Energy Company [Member] | Regulated Operation [Member] | Regulated retail [Member] | Industrial [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

207

200

376

350

MidAmerican Energy Company [Member] | Regulated Operation [Member] | Regulated retail [Member] | Natural gas distribution, transportation-only services [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

MidAmerican Energy Company [Member] | Regulated Operation [Member] | Regulated retail [Member] | Other [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

^[1]

MidAmerican Energy Company [Member] | Regulated Operation [Member] | Regulated wholesale [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

176

180

MidAmerican Energy Company [Member] | Regulated Operation [Member] | Electricity Transmission [Member] | Multi value transmission projects [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

MidAmerican Energy Company [Member] | Regulated Operation [Member] | Regulated electric

Revenue from Contract with Customer, Excluding Assessed Tax

531

582

1,067

1,046

MidAmerican Energy Company [Member] | Regulated Operation [Member] | Regulated electric | Regulated retail electric [Member]

538

589

1,080

1,058

Revenue from Contract with Customer, Excluding Assessed Tax

466

505

910

892

MidAmerican Energy Company [Member] | Regulated Operation [Member] | Regulated electric | Regulated retail electric [Member] | Residential [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

148

173

319

334

MidAmerican Energy Company [Member] | Regulated Operation [Member] | Regulated electric | Regulated retail electric [Member] | Commercial [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

154

151

MidAmerican Energy Company [Member] | Regulated Operation [Member] | Regulated electric | Regulated retail electric [Member] | Industrial [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

204

195

367

340

MidAmerican Energy Company [Member] | Regulated Operation [Member] | Regulated electric | Regulated retail electric [Member] | Other [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

^[1]

MidAmerican Energy Company [Member] | Regulated Operation [Member] | Regulated electric | Regulated wholesale [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

127

125

MidAmerican Energy Company [Member] | Regulated Operation [Member] | Regulated electric | Electricity Transmission [Member] | Multi value transmission projects [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

MidAmerican Energy Company [Member] | Regulated Operation [Member] | Regulated electric | Non-contracts with customer revenue [Member]

MidAmerican Energy Company [Member] | Regulated Operation [Member] | Regulated natural gas

Revenue from Contract with Customer, Excluding Assessed Tax

110

126

404

400

MidAmerican Energy Company [Member] | Regulated Operation [Member] | Regulated natural gas | Regulated retail gas [Member]

111

127

406

402

Revenue from Contract with Customer, Excluding Assessed Tax

103

355

345

MidAmerican Energy Company [Member] | Regulated Operation [Member] | Regulated natural gas | Regulated retail gas [Member] | Residential [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

241

233

MidAmerican Energy Company [Member] | Regulated Operation [Member] | Regulated natural gas | Regulated retail gas [Member] | Commercial [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

MidAmerican Energy Company [Member] | Regulated Operation [Member] | Regulated natural gas | Regulated retail gas [Member] | Industrial [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

MidAmerican Energy Company [Member] | Regulated Operation [Member] | Regulated natural gas | Regulated retail gas [Member] | Natural gas distribution, transportation-only services [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

MidAmerican Energy Company [Member] | Regulated Operation [Member] | Regulated natural gas | Regulated retail gas [Member] | Other [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

^[1]

(1)

MidAmerican Energy Company [Member] | Regulated Operation [Member] | Regulated natural gas | Regulated wholesale [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

MidAmerican Energy Company [Member] | Regulated Operation [Member] | Regulated natural gas | Non-contracts with customer revenue [Member]

MidAmerican Energy Company [Member] | Unregulated Operation [Member] | Other customer revenue [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

MidAmerican Energy Company [Member] | Unregulated Operation [Member] | Corporate and Other [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

MidAmerican Energy Company [Member] | Unregulated Operation [Member] | Corporate and Other [Member] | Other customer revenue [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

$ 1

$ 3

MidAmerican Energy Company [Member] | Unregulated Operation [Member] | Corporate and Other [Member] | Non-contracts with customer revenue [Member]

$ 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.

XML 189 R145.htm IDEA: XBRL DOCUMENT

Revenue from Contracts with Customers Revenue from Contracts with Customers - LLC - Customer Revenue (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 3,429	$ 3,564	$ 7,116	$ 7,088
Unregulated Operation [Member] \| Nonregulated products and services [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 366	363	646	635
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		$ 1	$ 1	$ 2

XML 190 R146.htm IDEA: XBRL DOCUMENT

Revenue from Contracts with Customers Revenue from Contracts with Customers - NPC - Customer Revenue (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 3,429	$ 3,564	$ 7,116	$ 7,088
Operating revenue	4,894	4,993	9,504	9,433
Non-contracts with customer revenue [Member]
Disaggregation of Revenue [Line Items]
Operating revenue	138	156	276	311
Regulated Operation [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	3,063	3,201	6,470	6,453
Regulated Operation [Member] \| Regulated retail electric [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	2,232	2,311	4,388	4,332
Nevada Power Company [Member]
Disaggregation of Revenue [Line Items]
Operating revenue	527	562	922	957
Nevada Power Company [Member] \| Non-contracts with customer revenue [Member]
Disaggregation of Revenue [Line Items]
Operating revenue	7	6	13	11
Nevada Power Company [Member] \| Regulated Operation [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	520	556	909	946
Nevada Power Company [Member] \| Regulated Operation [Member] \| Regulated retail electric [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	506	543	878	923
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	14	13	31	23
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	498	535	863	908
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	266	312	466	505
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	114	110	204	205
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	112	108	182	187
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	6	5	11	11
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	$ 8	$ 8	$ 15	$ 15

XML 191 R147.htm IDEA: XBRL DOCUMENT

Revenue from Contracts with Customers Revenue from Contracts with Customers - SPPC - Customer Revenue (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 3,429	$ 3,564	$ 7,116	$ 7,088
Operating revenue	4,894	4,993	9,504	9,433
Non-contracts with customer revenue [Member]
Disaggregation of Revenue [Line Items]
Operating revenue	138	156	276	311
Regulated Operation [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	3,063	3,201	6,470	6,453
Regulated Operation [Member] \| Regulated retail electric [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	2,232	2,311	4,388	4,332
Sierra Pacific Power Company [Member]
Disaggregation of Revenue [Line Items]
Operating revenue	194	188	413	410
Sierra Pacific Power Company [Member] \| Non-contracts with customer revenue [Member]
Disaggregation of Revenue [Line Items]
Operating revenue	2	2	3	4
Sierra Pacific Power Company [Member] \| Regulated electric
Disaggregation of Revenue [Line Items]
Operating revenue	172	169	354	350
Sierra Pacific Power Company [Member] \| Regulated electric \| Non-contracts with customer revenue [Member]
Disaggregation of Revenue [Line Items]
Operating revenue	1	2	2	3
Sierra Pacific Power Company [Member] \| Regulated natural gas
Disaggregation of Revenue [Line Items]
Operating revenue	22	19	59	60
Sierra Pacific Power Company [Member] \| Regulated natural gas \| Non-contracts with customer revenue [Member]
Disaggregation of Revenue [Line Items]
Operating revenue	1	0	1	1
Sierra Pacific Power Company [Member] \| Regulated Operation [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	192	186	410	406
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	11	10	28	23
Sierra Pacific Power Company [Member] \| Regulated Operation [Member] \| Regulated electric
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	171	167	352	347
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	11	10	28	23
Sierra Pacific Power Company [Member] \| Regulated Operation [Member] \| Regulated natural gas
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	21	19	58	59
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	0	0	0
Sierra Pacific Power Company [Member] \| Regulated Operation [Member] \| Fully bundled customer [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	180	175	380	381
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	72	72	164	166
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	59	62	123	130
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	48	40	90	82
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	1	1	3	3
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	159	156	322	322
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	58	59	126	127
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	54	58	108	115
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	46	38	85	77
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	1	1	3	3
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	21	19	58	59
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	14	13	38	39
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	5	4	15	15
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	2	2	5	5
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	2	2
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	2	2
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	181	176	382	383
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	160	157	324	324
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	$ 21	$ 19	$ 58	$ 59

XML 192 R148.htm IDEA: XBRL DOCUMENT

Components of Accumulated Other Comprehensive Loss, Net (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 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	$ 18	$ 54	(14)	$ 51
Other comprehensive income (loss), foreign currency translation adjustment	(49)	(307)	106	(234)
Other comprehensive income (loss), unrealized gains (losses) on cash flow hedges	(27)	3	(35)	1
Other comprehensive income (loss)	(58)	(250)	57	(182)
Ending balance - Accumulated other comprehensive loss, net	(1,888)		(1,888)
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			(14)	51
Other comprehensive income (loss), foreign currency translation adjustment			106	(234)
Unrealized gains on marketable securities, net of tax			0	0
Other comprehensive income (loss), unrealized gains (losses) on cash flow hedges			(35)	1
Other comprehensive income (loss)	(58)	(250)	57	(182)
Ending balance - unrecognized amounts on retirement benefits	(372)	(332)	(372)	(332)
Ending balance - foreign currency translation adjustment	(1,517)	(1,363)	(1,517)	(1,363)
Ending balance - unrealized gains (losses) on available-for-sale securities	0	0	0	0
Ending balance - unrealized gains (losses) on cash flow hedges	1	30	1	30
Ending balance - Accumulated other comprehensive loss, net	$ (1,888)	$ (1,665)	$ (1,888)	$ (1,665)

XML 193 R149.htm IDEA: XBRL DOCUMENT

Components of Accumulated Other Comprehensive Loss, Net - MEC (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 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	$ (27)	$ 3	(35)	$ 1
Other comprehensive income (loss)	(58)	(250)	57	(182)
Ending balance - Accumulated other comprehensive loss, net	(1,888)		(1,888)
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			(35)	1
Other comprehensive income (loss)	(58)	(250)	57	(182)
Ending balance - unrealized gains (losses) on available-for-sale securities	0	0	0	0
Ending balance - unrealized gains (losses) on cash flow hedges	1	30	1	30
Ending balance - Accumulated other comprehensive loss, net	$ (1,888)	$ (1,665)	$ (1,888)	$ (1,665)

XML 194 R150.htm IDEA: XBRL DOCUMENT

Segment Information (Details) - USD ($)
$ in Millions

3 Months Ended

6 Months Ended

Jun. 30, 2019

Jun. 30, 2018

Jun. 30, 2019

Jun. 30, 2018

Dec. 31, 2018

$ 4,894

$ 4,993

$ 9,504

$ 9,433

Depreciation and amortization

728

739

1,448

1,443

739

750

1,472

1,466

959

972

1,878

1,843

476

461

953

927

Capitalized interest

Interest and dividend income

Gains (losses) on marketable securities, net

(387)

(62)

(596)

610

196

1,097

481

96,142

$ 92,189

1,167

1,193

2,426

2,377

209

197

414

399

268

284

552

531

102

198

192

MidAmerican Funding [Member]

24,528

23,478

660

718

1,502

1,465

179

208

356

366

210

166

149

124

21,140

20,029

NV Energy, Inc. [Member]

721

750

1,335

1,367

120

114

240

227

150

144

234

233

118

117

Northern Powergrid Holdings [Member]

14,189

14,119

243

246

506

524

126

127

110

111

239

258

BHE Pipeline Group [Member]

7,587

7,427

212

236

583

612

311

283

BHE Transmission [Member]

5,627

5,511

175

177

343

357

118

123

153

162

8,720

8,424

BHE Renewables [Member]

249

246

416

400

139

130

104

115

132

101

8,942

8,666

HomeServices [Member]

Depreciation and amortization

1,327

1,273

2,112

2,034

117

108

100

Berkshire Hathaway Energy And Other [Member]

4,056

2,797

140

^[1]

154

^[1]

281

^[1]

297

(1)

(2)

(1)

(22)

(4)

(32)

(22)

107

102

215

205

1,353

$ 1,738

UNITED STATES

4,476

4,570

8,653

8,548

482

818

211

UNITED KINGDOM

242

245

505

522

179

161

CANADA

175

177

343

357

The Philippines and other [Member]

$ 13

$ 21

$ 27

[1]	(1)The BHE and Other reportable segment represents amounts related principally to other entities, corporate functions and intersegment eliminations.

XML 195 R151.htm IDEA: XBRL DOCUMENT

Segment Information - Goodwill (Details) $ in Millions	6 Months Ended
Segment Information - Goodwill (Details) $ in Millions	Jun. 30, 2019 USD ($)
Goodwill [Roll Forward]
Beginning balance	$ 9,595
Acquisitions	23
Foreign currency translation	57
Ending balance	9,675
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	(3)
Ending balance	949
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	60
Ending balance	1,508
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	23
Foreign currency translation	0
Ending balance	$ 1,450

XML 196 R152.htm IDEA: XBRL DOCUMENT

Segment Information Segment Information - MEC (Details) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019 USD ($)	Jun. 30, 2018 USD ($)	Jun. 30, 2019 USD ($) OperatingSegments ReportableSegments	Jun. 30, 2018 USD ($)	Dec. 31, 2018 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments \| OperatingSegments			8
Operating revenue	$ 4,894	$ 4,993	$ 9,504	$ 9,433
Operating income	959	972	1,878	1,843
Interest expense	(476)	(461)	(953)	(927)
Capitalized interest	17	15	33	27
Allowance for equity funds	38	24	70	45
Other, net	30	1	65	31
Income before income tax (benefit) expense and equity income	610	196	1,097	481
Assets	96,142		$ 96,142		$ 92,189
MidAmerican Energy Company [Member]
Segment Reporting Information [Line Items]
Number of reportable segments \| ReportableSegments			2
Operating revenue	659	717	$ 1,501	1,463
Operating income	94	87	209	166
Interest expense	(70)	(56)	(139)	(114)
Capitalized interest	7	4	13	8
Allowance for equity funds	17	13	32	23
Other, net	10	12	30	21
Income before income tax (benefit) expense and equity income	58	60	145	104
Assets	19,027		19,027		17,920
MidAmerican Energy Company [Member] \| Regulated electric
Segment Reporting Information [Line Items]
Operating revenue	538	589	1,080	1,058
Operating income	87	78	153	114
Assets	17,735		17,735		16,511
MidAmerican Energy Company [Member] \| Regulated natural gas
Segment Reporting Information [Line Items]
Operating revenue	111	127	406	402
Operating income	5	8	53	51
Assets	1,289		1,289		1,406
MidAmerican Energy Company [Member] \| Corporate and Other [Member]
Segment Reporting Information [Line Items]
Operating revenue	10	1	15	3
Operating income	2	$ 1	3	$ 1
Assets	$ 3		$ 3		$ 3

XML 197 R153.htm IDEA: XBRL DOCUMENT

Segment Information Segment Information - MidAmerican Funding (Details)
$ in Millions

3 Months Ended

6 Months Ended

Jun. 30, 2019

USD ($)

Jun. 30, 2018

USD ($)

Jun. 30, 2019

USD ($)

OperatingSegments

ReportableSegments

Jun. 30, 2018

USD ($)

Dec. 31, 2018

USD ($)

Number of reportable segments | OperatingSegments

$ 4,894

$ 4,993

$ 9,504

$ 9,433

959

972

1,878

1,843

(476)

(461)

(953)

(927)

Capitalized interest

Income before income tax (benefit) expense and equity income

610

196

1,097

481

96,142

$ 96,142

$ 92,189

Number of reportable segments | ReportableSegments

660

718

$ 1,502

1,465

210

166

(74)

(61)

(149)

(124)

Capitalized interest

Income before income tax (benefit) expense and equity income

137

MidAmerican Funding, LLC and Subsidiaries [Domain] | Regulated electric

^[1]

20,313

19,202

538

589

1,080

1,058

153

114

MidAmerican Funding, LLC and Subsidiaries [Domain] | Regulated natural gas

^[1]

18,926

17,702

111

127

406

402

MidAmerican Funding, LLC and Subsidiaries [Domain] | Corporate and Other [Member]

^[1]

1,368

1,485

$ 1

^[1]

$ 19

$ 15

[1]	(1)Consists principally of cash and cash equivalents not included in either the regulated electric or regulated natural gas segments.

XML 198 R154.htm IDEA: XBRL DOCUMENT

Segment Information Segment Information - SPPC (Details)
$ in Millions

3 Months Ended

6 Months Ended

Jun. 30, 2019

USD ($)

Jun. 30, 2018

USD ($)

Jun. 30, 2019

USD ($)

OperatingSegments

TheNumberOfReportableSegments

Jun. 30, 2018

USD ($)

Dec. 31, 2018

USD ($)

Number of reportable segments | OperatingSegments

$ 4,894

$ 4,993

$ 9,504

$ 9,433

959

972

1,878

1,843

(476)

(461)

(953)

(927)

610

196

1,097

481

96,142

$ 96,142

$ 92,189

Number of reportable segments | TheNumberOfReportableSegments

194

188

$ 413

410

Allowance for Funds Used During Construction, Capitalized Interest

(12)

(11)

(24)

(21)

Sierra Pacific Power Company [Member] | Regulated electric

3,594

3,569

Regulated Operating Revenue

172

169

354

350

172

169

354

350

Sierra Pacific Power Company [Member] | Regulated natural gas

3,237

3,177

Regulated Operating Revenue, Gas

$ 1

$ 11

Sierra Pacific Power Company [Member] | Regulated common assets [Member]

316

314