bhe-20210331

Cash and cash equivalents

Current assets:

Trade receivables, net

521

234

Income Taxes Receivable, Current

295

Inventories

231

278

Other current assets

102

Total current assets

1,187

625

Property, plant and equipment, net

19,223

19,279

Goodwill

1,270

Regulatory assets

439

392

Investments and restricted cash and cash equivalents and investments

940

913

Other assets

215

232

Total assets

^[1]

23,274

22,711

Current liabilities:

Accounts payable

292

408

Accrued interest

Accrued property, income and other taxes

124

161

Notes Payable, Related Parties, Current

184

177

Other current liabilities

187

183

Total current liabilities

1,261

1,012

Long-term debt

7,464

7,450

Regulatory liabilities

1,257

1,111

Deferred income taxes

3,104

3,052

Asset retirement obligations

711

709

Other long-term liabilities

414

458

Total liabilities

14,211

13,792

Commitments and contingencies

Equity:

Additional paid-in capital

1,679

Retained earnings

7,384

7,240

Total BHE shareholders' equity

9,063

8,919

Total liabilities and equity

$ 23,274

$ 22,711

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

XML 48 R7.htm IDEA: XBRL DOCUMENT

Consolidated Balance Sheets - NPC - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 1,276	$ 1,290
Inventories	1,110	1,168
Other current assets	3,236	2,741
Total current assets	10,220	9,447
Regulatory assets	3,221	3,157
Other assets	2,780	2,758
Total assets	127,522	127,316
Current liabilities:
Accounts payable	1,548	1,867
Accrued interest	642	555
Accrued property, income and other taxes	515	582
Other current liabilities	1,948	1,626
Total current liabilities	9,775	9,138
Regulatory liabilities	7,355	7,221
Deferred income taxes	11,630	11,775
Other long-term liabilities	4,261	4,178
Total liabilities	80,471	80,339
Commitments and contingencies
Equity:
Common stock	0	0
Additional paid-in capital	6,377	6,377
Retained earnings	35,060	35,093
Accumulated other comprehensive loss, net	(1,440)	(1,552)
Total BHE shareholders' equity	43,089	43,010
Total liabilities and equity	$ 127,522	127,316
Common Stock, Shares Authorized	115,000,000
Common Stock, Shares, Issued	76,000,000
Common Stock, Shares, Outstanding	76,000,000
Nevada Power Company [Member]
Current assets:
Cash and cash equivalents	$ 92	25
Trade receivables, net	180	234
Inventories	65	69
Derivative Asset, Current	48	26
Regulatory assets	22	48
Prepayments	45	38
Other current assets	37	26
Total current assets	489	466
Property, plant and equipment, net	6,751	6,701
Finance Lease, Right-of-Use Asset, after Accumulated Amortization	348	351
Regulatory assets	741	746
Other assets	71	72
Total assets	8,400	8,336
Current liabilities:
Accounts payable	189	181
Accrued interest	38	32
Accrued property, income and other taxes	38	25
Finance Lease, Liability, Current	30	27
Regulatory liabilities	63	50
Customer deposits	42	47
Asset Retirement Obligation, Current	18	25
Other current liabilities	38	22
Total current liabilities	456	409
Long-term debt	2,497	2,496
Finance Lease, Liability, Noncurrent	328	334
Regulatory liabilities	1,171	1,163
Deferred income taxes	740	738
Other long-term liabilities	267	257
Total liabilities	5,459	5,397
Commitments and contingencies
Equity:
Common stock	0	0
Additional paid-in capital	2,308	2,308
Retained earnings	636	634
Accumulated other comprehensive loss, net	(3)	(3)
Total BHE shareholders' equity	2,941	2,939
Total liabilities and equity	$ 8,400	$ 8,336
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 49 R8.htm IDEA: XBRL DOCUMENT

Consolidated Balance Sheets - SPPC - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 1,276	$ 1,290
Inventories	1,110	1,168
Other current assets	3,236	2,741
Total current assets	10,220	9,447
Regulatory assets	3,221	3,157
Other assets	2,780	2,758
Total assets	127,522	127,316
Current liabilities:
Accounts payable	1,548	1,867
Accrued interest	642	555
Accrued property, income and other taxes	515	582
Short-term debt	2,699	2,286
Other current liabilities	1,948	1,626
Total current liabilities	9,775	9,138
Regulatory liabilities	7,355	7,221
Deferred income taxes	11,630	11,775
Other long-term liabilities	4,261	4,178
Total liabilities	80,471	80,339
Commitments and contingencies
Equity:
Common stock	0	0
Additional paid-in capital	6,377	6,377
Retained earnings	35,060	35,093
Accumulated other comprehensive loss, net	(1,440)	(1,552)
Total BHE shareholders' equity	43,089	43,010
Total liabilities and equity	$ 127,522	127,316
Common Stock, Shares Authorized	115,000,000
Common Stock, Shares, Issued	76,000,000
Common Stock, Shares, Outstanding	76,000,000
Sierra Pacific Power Company [Member]
Current assets:
Cash and cash equivalents	$ 8	19
Trade receivables, net	93	97
Inventories	74	77
Derivative Asset, Current	16	9
Regulatory assets	91	67
Other current assets	38	36
Total current assets	320	305
Property, plant and equipment, net	3,188	3,164
Regulatory assets	270	267
Other assets	185	183
Total assets	3,963	3,919
Current liabilities:
Accounts payable	103	108
Accrued interest	11	14
Accrued property, income and other taxes	16	14
Short-term debt	55	45
Regulatory liabilities	28	34
Customer deposits	14	15
Other current liabilities	33	25
Total current liabilities	260	255
Long-term debt, carrying value	1,164	1,164
Finance Lease, Liability, Noncurrent	119	121
Regulatory liabilities	466	463
Deferred income taxes	382	374
Other long-term liabilities	133	131
Total liabilities	2,524	2,508
Commitments and contingencies
Equity:
Common stock	0	0
Additional paid-in capital	1,111	1,111
Retained earnings	329	301
Accumulated other comprehensive loss, net	(1)	(1)
Total BHE shareholders' equity	1,439	1,411
Total liabilities and equity	$ 3,963	$ 3,919
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 50 R9.htm IDEA: XBRL DOCUMENT

Consolidated Balance Sheets (Unaudited) - EEGH - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 1,276	$ 1,290
Restricted cash and cash equivalents	117	140
Trade receivables, net	2,416	2,107
Inventories	1,110	1,168
Other current assets	3,236	2,741
Total current assets	10,220	9,447
Property, plant and equipment, net	86,757	86,128
Goodwill	11,534	11,506
Investments	13,010	14,320
Other assets	2,780	2,758
Total assets	127,522	127,316
Current liabilities:
Accounts payable	1,548	1,867
Accrued interest	642	555
Accrued property, income and other taxes	515	582
Current portion of long-term debt	2,011	1,839
Other current liabilities	1,948	1,626
Total current liabilities	9,775	9,138
Regulatory liabilities	7,355	7,221
Other long-term liabilities	4,261	4,178
Total liabilities	80,471	80,339
Commitments and contingencies
Member's equity:
Accumulated other comprehensive loss, net	(1,440)	(1,552)
Total liabilities and equity	127,522	127,316
Eastern Energy Gas Holdings, LLC [Member]
Current assets:
Cash and cash equivalents	106	35
Restricted cash and cash equivalents	9	13
Trade receivables, net	158	177
Receivables from affiliates	263	139
Other receivables	44	51
Inventories	120	119
Other current assets	145	122
Total current assets	845	656
Property, plant and equipment, net	10,099	10,144
Goodwill	1,286	1,286
Investments	262	244
Other assets	240	291
Total assets	12,732	12,621
Current liabilities:
Accounts payable	59	71
Accounts payable to affiliates	57	39
Accrued interest	54	19
Accrued property, income and other taxes	60	29
Notes payable	0	9
Current portion of long-term debt	500	500
Other current liabilities	127	147
Total current liabilities	857	814
Long-term debt	3,914	3,925
Regulatory liabilities	668	669
Other long-term liabilities	215	218
Total liabilities	5,654	5,626
Commitments and contingencies
Member's equity:
Membership interests	3,035	2,957
Accumulated other comprehensive loss, net	(45)	(53)
Total member's equity	2,990	2,904
Noncontrolling interests	4,088	4,091
Total equity	7,078	6,995
Total liabilities and equity	$ 12,732	$ 12,621

XML 51 R10.htm IDEA: XBRL DOCUMENT

Consolidated Statements of Operations - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Operating revenue:
Total operating revenue	$ 6,081	$ 4,527
Energy:
Cost of sales	1,569	1,038
Operations and maintenance	934	737
Depreciation and amortization	915	809
Property and other taxes	210	151
Real estate	1,120	873
Total operating expenses	4,748	3,608
Operating income	1,333	919
Other income (expense):
Interest expense	(530)	(483)
Capitalized interest	14	17
Allowance for equity funds	26	34
Interest and dividend income	21	20
(Losses) gains on marketable securities, net	(1,118)	27
Other, net	8	(27)
Total other income (expense)	(1,579)	(412)
Income before income tax expense (benefit) and equity income (loss)	(246)	507
Income tax benefit	(535)	(184)
Equity loss	(179)	(18)
Net income	110	673
Net income attributable to noncontrolling interests	106	3
Net income (loss) attributable to parent	4	670
Dividends, Preferred Stock	38	0
Undistributed Earnings (Loss) Available to Common Shareholders, Diluted	(34)	670
Electricity and natural gas [Member]
Operating revenue:
Total operating revenue	4,849	3,634
Residential real estate brokerage and mortgage businesses [Member]
Operating revenue:
Total operating revenue	$ 1,232	$ 893

XML 52 R11.htm IDEA: XBRL DOCUMENT

Consolidated Statements of Operations - PacifiCorp - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Operating revenue	$ 6,081	$ 4,527
Cost of sales	1,569	1,038
Operating expenses:
Operating income	1,333	919
Other income (expense):
Interest expense	(530)	(483)
Allowance for borrowed funds	14	17
Allowance for equity funds	26	34
Interest and dividend income	21	20
Other, net	8	(27)
Total other income (expense)	(1,579)	(412)
Income before income tax expense and equity income	(246)	507
Income tax benefit	(535)	(184)
Net Income (Loss) Attributable to Parent	4	670
PacifiCorp [Member]
Operating revenue	1,242	1,206
Cost of sales	424	417
Operating expenses:
Operations and maintenance	259	254
Depreciation and amortization	264	252
Property and other taxes	61	49
Utilities Operating Expense	1,008	972
Operating income	234	234
Other income (expense):
Interest expense	(107)	(102)
Allowance for borrowed funds	6	10
Allowance for equity funds	13	21
Interest and dividend income	6	3
Other, net	6	(4)
Total other income (expense)	(76)	(72)
Income before income tax expense and equity income	158	162
Income tax benefit	(11)	(14)
Net Income (Loss) Attributable to Parent	$ 169	$ 176

XML 53 R12.htm IDEA: XBRL DOCUMENT

Statements of Operations - MEC - USD ($) $ in Millions	3 Months Ended
Statements of Operations - MEC - USD ($) $ in Millions	Mar. 31, 2021	Mar. 31, 2020
Operating revenue:
Total operating revenue	$ 6,081	$ 4,527
Cost of sales	1,569	1,038
Operating expenses:
Total operating expenses	4,748	3,608
Operating income	1,333	919
Other income (expense):
Interest expense	(530)	(483)
Allowance for borrowed funds	14	17
Allowance for equity funds	26	34
Other, net	8	(27)
Total other income (expense)	(1,579)	(412)
Income before income tax (benefit) expense and equity income	(246)	507
Income tax benefit	(535)	(184)
Net income (loss) attributable to parent	4	670
MidAmerican Energy Company [Member]
Operating revenue:
Total operating revenue	1,067	681
Operating expenses:
Operations and maintenance	193	165
Depreciation and amortization	207	176
Property and other taxes	36	34
Total operating expenses	1,019	583
Operating income	48	98
Other income (expense):
Interest expense	(74)	(76)
Allowance for borrowed funds	2	3
Allowance for equity funds	6	8
Other, net	11	(5)
Total other income (expense)	(55)	(70)
Income before income tax (benefit) expense and equity income	(7)	28
Income tax benefit	(154)	(123)
Net income (loss) attributable to parent	147	151
Regulated electric \| MidAmerican Energy Company [Member]
Operating revenue:
Total operating revenue	545	471
Cost of sales	151	80
Regulated natural gas and other \| MidAmerican Energy Company [Member]
Operating revenue:
Total operating revenue	522	210
Cost of sales	$ 432	$ 128

XML 54 R13.htm IDEA: XBRL DOCUMENT

Consolidated Statements of Operations - MidAmerican Funding - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Operating revenue:
Total operating revenue	$ 6,081	$ 4,527
Cost of sales	1,569	1,038
Operating expenses:
Total operating expenses	4,748	3,608
Operating income	1,333	919
Other income (expense):
Interest expense	(530)	(483)
Allowance for borrowed funds	14	17
Allowance for equity funds	26	34
Other, net	8	(27)
Total other income (expense)	(1,579)	(412)
Income before income tax (benefit) expense and equity income	(246)	507
Income tax benefit	(535)	(184)
Net Income (Loss) Attributable to Parent	4	670
MidAmerican Funding, LLC and Subsidiaries [Member]
Operating revenue:
Total operating revenue	1,067	686
Operating expenses:
Operations and maintenance	193	165
Depreciation and amortization	207	176
Property and other taxes	36	34
Total operating expenses	1,019	584
Operating income	48	102
Other income (expense):
Interest expense	(78)	(81)
Allowance for borrowed funds	2	3
Allowance for equity funds	6	8
Other, net	10	(6)
Total other income (expense)	(60)	(76)
Income before income tax (benefit) expense and equity income	(12)	26
Income tax benefit	(156)	(124)
Net Income (Loss) Attributable to Parent	144	150
Regulated electric \| MidAmerican Funding, LLC and Subsidiaries [Member]
Operating revenue:
Total operating revenue	545	471
Cost of sales	151	80
Regulated natural gas and other \| MidAmerican Funding, LLC and Subsidiaries [Member]
Operating revenue:
Total operating revenue	522	215
Cost of sales	$ 432	$ 129

XML 55 R14.htm IDEA: XBRL DOCUMENT

Consolidated Statements of Operations - NPC - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Operating revenue	$ 6,081	$ 4,527
Cost of sales	1,569	1,038
Total operating expenses	4,748	3,608
Operating income	1,333	919
Interest expense	(530)	(483)
Allowance for borrowed funds	14	17
Allowance for equity funds	26	34
Other, net	8	(27)
Total other income (expense)	(1,579)	(412)
Income before income tax expense and equity income	(246)	507
Income tax benefit	(535)	(184)
Net income attributable to BHE shareholders	4	670
Nevada Power Company [Member]
Operating revenue	370	389
Cost of sales	165	170
Operations and maintenance	63	82
Depreciation and amortization	101	90
Property and other taxes	12	12
Total operating expenses	341	354
Operating income	29	35
Interest expense	(38)	(42)
Allowance for borrowed funds	1	1
Allowance for equity funds	1	2
Other, net	9	(1)
Total other income (expense)	(27)	(40)
Income before income tax expense and equity income	2	(5)
Income tax benefit	0	(1)
Net income attributable to BHE shareholders	$ 2	$ (4)

XML 56 R15.htm IDEA: XBRL DOCUMENT

Consolidated Statements of Operations - SPPC - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Total operating revenue	$ 6,081	$ 4,527
Cost of sales	1,569	1,038
Total operating expenses	4,748	3,608
Operating income	1,333	919
Interest expense	(530)	(483)
Allowance for equity funds	26	34
Other, net	8	(27)
Total other income (expense)	(1,579)	(412)
Income before income tax expense and equity income	(246)	507
Income tax benefit	(535)	(184)
Net income attributable to BHE shareholders	4	670
Sierra Pacific Power Company [Member]
Total operating revenue	220	232
Operations and maintenance	36	42
Depreciation and amortization	36	34
Property and other taxes	6	6
Total operating expenses	181	192
Operating income	39	40
Interest expense	(14)	(14)
Allowance for equity funds	1	1
Other, net	6	1
Total other income (expense)	(7)	(12)
Income before income tax expense and equity income	32	28
Income tax benefit	4	3
Net income attributable to BHE shareholders	28	25
Sierra Pacific Power Company [Member] \| Regulated electric
Total operating revenue	181	184
Cost of sales	82	80
Sierra Pacific Power Company [Member] \| Regulated natural gas
Total operating revenue	39	48
Cost of sales	$ 21	$ 30

XML 57 R16.htm IDEA: XBRL DOCUMENT

Consolidated Statements of Operations (Unaudited) - EEGH - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Operating revenue	$ 6,081	$ 4,527
Operating expenses:
Total operating expenses	4,748	3,608
Operating income	1,333	919
Other income (expense):
Interest expense	(530)	(483)
Allowance for equity funds	26	34
Interest and dividend income	21	20
Other, net	8	(27)
Total other income (expense)	(1,579)	(412)
Income before income tax expense (benefit) and equity income (loss)	(246)	507
Income tax benefit	(535)	(184)
Equity income	(179)	(18)
Net income	110	673
Net income attributable to noncontrolling interests	106	3
Net income (loss) attributable to parent	4	670
Eastern Energy Gas Holdings, LLC [Member]
Operating revenue	486	556
Operating expenses:
Cost of gas	0	8
Operations and maintenance	124	168
Depreciation and amortization	80	93
Property and other taxes	39	39
Total operating expenses	243	308
Operating income	243	248
Other income (expense):
Interest expense	(44)	(58)
Allowance for equity funds	2	5
Interest and dividend income	0	30
Other, net	1	14
Total other income (expense)	(41)	(9)
Income before income tax expense (benefit) and equity income (loss)	202	239
Income tax benefit	27	52
Equity income	16	15
Net income	191	202
Net income attributable to noncontrolling interests	102	33
Net income (loss) attributable to parent	$ 89	$ 169

XML 58 R17.htm IDEA: XBRL DOCUMENT

Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Statement of Comprehensive Income [Abstract]
Net income	$ 110	$ 673
Other comprehensive income (loss), net of tax:
Unrecognized amounts on retirement benefits, net of tax	7	34
Foreign currency translation adjustment	91	(548)
Unrealized gains (losses) on cash flow hedges, net of tax	14	(33)
Total other comprehensive (loss) income, net of tax	112	(547)
Comprehensive income	222	126
Comprehensive income attributable to noncontrolling interests	106	3
Comprehensive income attributable to BHE shareholders	$ 116	$ 123

XML 59 R18.htm IDEA: XBRL DOCUMENT

Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Statement of Comprehensive Income [Abstract]
Unrecognized amounts on retirement benefits, tax	$ 4	$ 11
Unrealized gains (losses) on cash flow hedges, tax	$ 5	$ (10)

XML 60 R19.htm IDEA: XBRL DOCUMENT

Consolidated Statements of Comprehensive Income (Unaudited) - EEGH - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Net income	$ 110	$ 673
Other comprehensive income (loss), net of tax:
Unrecognized amounts on retirement benefits, net of tax	7	34
Unrealized gains (losses) on cash flow hedges, net of tax	14	(33)
Total other comprehensive (loss) income, net of tax	112	(547)
Comprehensive income	222	126
Comprehensive income attributable to noncontrolling interests	106	3
Comprehensive income attributable to BHE shareholders	116	123
Eastern Energy Gas Holdings, LLC [Member]
Net income	191	202
Other comprehensive income (loss), net of tax:
Unrecognized amounts on retirement benefits, net of tax	2	1
Unrealized gains (losses) on cash flow hedges, net of tax	10	(85)
Total other comprehensive (loss) income, net of tax	12	(84)
Comprehensive income	203	118
Comprehensive income attributable to noncontrolling interests	106	33
Comprehensive income attributable to BHE shareholders	$ 97	$ 85

Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income (loss) and other comprehensive income (loss), attributable to noncontrolling interests. Excludes changes in equity resulting from investments by owners and distributions to owners.

Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income. Excludes changes in equity resulting from investments by owners and distributions to owners.

Amount after tax and reclassification adjustments of other comprehensive income (loss).

The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
-Topic 235
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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Reference 5: http://www.xbrl.org/2003/role/disclosureRef
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Reference 7: http://www.xbrl.org/2003/role/disclosureRef
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Reference 9: http://www.xbrl.org/2003/role/disclosureRef
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Reference 10: http://www.xbrl.org/2003/role/disclosureRef
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Consolidated Statements of Comprehensive Income (Unaudited) - EEGH (Parenthetical) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Unrecognized amounts on retirement benefits, tax	$ 4	$ 11
Unrealized gains (losses) on cash flow hedges, tax	5	(10)
Eastern Energy Gas Holdings, LLC [Member]
Unrecognized amounts on retirement benefits, tax	0	1
Unrealized gains (losses) on cash flow hedges, tax	$ 3	$ (30)

XML 62 R21.htm IDEA: XBRL DOCUMENT

Consolidated Statements of Changes in Equity - USD ($) $ in Millions	Total	Preferred Stock [Member]	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]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Preferred Stock, Value, Outstanding		$ 0
Common Stock, Value, Outstanding			$ 0
Long-term income tax receivable					$ (530)
Balance at Dec. 31, 2019	$ 32,578			$ 6,389		$ 28,296	$ (1,706)	$ 129
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	673		0	0		670	0	3
Other comprehensive income (loss)	(547)		0	0		0	(547)	0
Common stock purchases	(126)		0	(6)		(120)	0	0
Dividends, Preferred Stock	0
Distributions to noncontrolling interests	(5)		0	0		0	0	(5)
Other equity transactions	(1)		0	(1)		0	0	0
Balance at Mar. 31, 2020	32,572			6,382		28,846	(2,253)	127
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Preferred Stock, Value, Outstanding		0
Common Stock, Value, Outstanding			0
Long-term income tax receivable					(530)
Preferred Stock, Value, Outstanding		3,750
Common Stock, Value, Outstanding			0
Long-term income tax receivable	(658)				(658)
Balance at Dec. 31, 2020	46,977			6,377		35,093	(1,552)	3,967
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	110		0	0		4	0	106
Other comprehensive income (loss)	112		0	0		0	112	0
Dividends, Preferred Stock	(38)					(38)
Distributions to noncontrolling interests	(113)		0	0	0	0	0	(113)
Other equity transactions	3		0	0	0	1	0	2
Balance at Mar. 31, 2021	47,051			$ 6,377		$ 35,060	$ (1,440)	$ 3,962
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Preferred Stock, Value, Outstanding		$ 3,750
Common Stock, Value, Outstanding			$ 0
Long-term income tax receivable	$ (658)				$ (658)

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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]
Balance at Dec. 31, 2019					$ (1,706)	$ 8,437	$ 2	$ 0	$ 4,479	$ 3,972	$ (16)
Net Income (Loss) Attributable to Parent	$ 670					176				176
Total other comprehensive (loss) income, net of tax	(547)	$ 0	$ 0	$ 0	(547)	1				0	1
Balance at Mar. 31, 2020					(2,253)	8,614	2	0	4,479	4,148	(15)
Balance at Dec. 31, 2020	43,010				(1,552)	9,173	2	0	4,479	4,711	(19)
Net Income (Loss) Attributable to Parent	4					169				169
Total other comprehensive (loss) income, net of tax	112	$ 0	$ 0	$ 0	112
Balance at Mar. 31, 2021	$ 43,089				$ (1,440)	$ 9,342	$ 2	$ 0	$ 4,479	$ 4,880	$ (19)

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

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Amount after tax and reclassification adjustments of other comprehensive income (loss).

Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.

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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]
Balance at Dec. 31, 2019					$ (1,706)	$ 7,240	$ 0	$ 561	$ 6,679
Net Income (Loss) Attributable to Parent	$ 670					151			151
Other comprehensive income (loss)	(547)	$ 0	$ 0	$ 0	(547)
Stockholders' Equity, Other	(1)	0	(1)	0	0
Balance at Mar. 31, 2020					(2,253)	7,391	0	561	6,830
Balance at Dec. 31, 2020	43,010				(1,552)	8,065	0	561	7,504
Net Income (Loss) Attributable to Parent	4					147			147
Other comprehensive income (loss)	112	0	0	0	112
Stockholders' Equity, Other	3	$ 0	$ 0	$ 1	0
Balance at Mar. 31, 2021	$ 43,089				$ (1,440)	$ 8,212	$ 0	$ 561	$ 7,651

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

Amount after tax and reclassification adjustments of other comprehensive income (loss).

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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 [Member]	MidAmerican Funding, LLC and Subsidiaries [Member] Additional Paid-in Capital [Member]	MidAmerican Funding, LLC and Subsidiaries [Member] Retained Earnings [Member]
Balance at Dec. 31, 2019				$ (1,706)	$ 8,101	$ 1,679	$ 6,422
Net Income (Loss) Attributable to Parent	$ 670				150		150
Other comprehensive income (loss)	(547)	$ 0	$ 0	(547)
Stockholders' Equity, Other	(1)	(1)	0	0
Balance at Mar. 31, 2020				(2,253)	8,251	1,679	6,572
Balance at Dec. 31, 2020	43,010			(1,552)	8,919	1,679	7,240
Net Income (Loss) Attributable to Parent	4				144		144
Other comprehensive income (loss)	112	0	0	112
Stockholders' Equity, Other	3	$ 0	$ 1	0
Balance at Mar. 31, 2021	$ 43,089			$ (1,440)	$ 9,063	$ 1,679	$ 7,384

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

Amount after tax and reclassification adjustments of other comprehensive income (loss).

XML 66 R25.htm IDEA: XBRL DOCUMENT

Consolidated Statements of Changes in Equity - NPC - USD ($) $ in Millions	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive (Loss) Income, Net [Member]	Nevada Power Company [Member]	Nevada Power Company [Member] Common Stock [Member]	Nevada Power Company [Member] Additional Paid-in Capital [Member]	Nevada Power Company [Member] Retained Earnings [Member]	Nevada Power Company [Member] Accumulated Other Comprehensive (Loss) Income, Net [Member]
Balance (shares) at Dec. 31, 2019							1,000
Balance at Dec. 31, 2019					$ (1,706)	$ 2,797	$ 0	$ 2,308	$ 493	$ (4)
Net Income (Loss) Attributable to Parent	$ 670					(4)			(4)
Stockholders' Equity, Other	(1)	$ 0	$ (1)	$ 0	0	(1)			(1)
Balance (shares) at Mar. 31, 2020							1,000
Balance at Mar. 31, 2020					(2,253)	$ 2,794	$ 0	2,308	490	(4)
Balance (shares) at Dec. 31, 2020						1,000	1,000
Balance at Dec. 31, 2020	43,010				(1,552)	$ 2,939	$ 0	2,308	634	(3)
Net Income (Loss) Attributable to Parent	4					$ 2			2
Stockholders' Equity, Other	$ 3	$ 0	$ 0	$ 1	0
Balance (shares) at Mar. 31, 2021	76,000,000					1,000	1,000
Balance at Mar. 31, 2021	$ 43,089				$ (1,440)	$ 2,941	$ 0	$ 2,308	$ 636	$ (3)

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

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Consolidated Statements of Changes in Equity - SPPC - USD ($) $ in Millions	Total	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, 2019				1,000
Balance at Dec. 31, 2019		$ (1,706)	$ 1,320	$ 0	$ 1,111	$ 210	$ (1)
Net Income (Loss) Attributable to Parent	$ 670		25			25
Balance (shares) at Mar. 31, 2020				1,000
Balance at Mar. 31, 2020		(2,253)	$ 1,345	$ 0	1,111	235	(1)
Balance (shares) at Dec. 31, 2020			1,000	1,000
Balance at Dec. 31, 2020	43,010	(1,552)	$ 1,411	$ 0	1,111	301	(1)
Net Income (Loss) Attributable to Parent	$ 4		$ 28			28
Balance (shares) at Mar. 31, 2021	76,000,000		1,000	1,000
Balance at Mar. 31, 2021	$ 43,089	$ (1,440)	$ 1,439	$ 0	$ 1,111	$ 329	$ (1)

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

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Consolidated Statements of Changes in Equity (Unaudited) - EEGH - USD ($) $ in Millions	Total	Eastern Energy Gas Holdings, LLC [Member]	Member Interests[Member] Eastern Energy Gas Holdings, LLC [Member]	Accumulated Other Comprehensive (Loss) Income, Net [Member]	Accumulated Other Comprehensive (Loss) Income, Net [Member] Eastern Energy Gas Holdings, LLC [Member]	Noncontrolling Interest [Member]	Noncontrolling Interest [Member] Eastern Energy Gas Holdings, LLC [Member]
Balance at Dec. 31, 2019	$ 32,578	$ 10,229	$ 9,031	$ (1,706)	$ (187)	$ 129	$ 1,385
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	673	202	169				33
Other comprehensive income (loss)	(547)	(84)		(547)	(84)	0
Distributions		(269)	(232)				(37)
Balance at Mar. 31, 2020	32,572	10,078	8,968	(2,253)	(271)	127	1,381
Balance at Dec. 31, 2020	46,977	6,995	2,957	(1,552)	(53)	3,967	4,091
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	110	191	89				102
Other comprehensive income (loss)	112	12		112	8	0	4
Contributions		11	11
Distributions		(131)	(22)				(109)
Balance at Mar. 31, 2021	$ 47,051	$ 7,078	$ 3,035	$ (1,440)	$ (45)	$ 3,962	$ 4,088

Amount after tax and reclassification adjustments of other comprehensive income (loss).

The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.

Amount of stockholders' equity (deficit), net of receivables from officers, directors, owners, and affiliates of the entity, attributable to both the parent and noncontrolling interests. Amount excludes temporary equity. Alternate caption for the concept is permanent equity.

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Business Combination Disclosure [Text Block]

XML 69 R28.htm IDEA: XBRL DOCUMENT

Consolidated Statements of Cash Flows - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Cash flows from operating activities:
Net income	$ 110	$ 673
Adjustments to reconcile net income to net cash flows from operating activities:
Gains (losses) on marketable securities, net	1,118	(27)
Depreciation and amortization	927	821
Allowance for equity funds	(26)	(34)
Equity income, net of distributions	221	29
Changes in regulatory assets and liabilities	(9)	0
Deferred income taxes and amortization of investment tax credits	(135)	47
Other, net	9	63
Changes in other operating assets and liabilities, net of effects from acquisitions:
Trade receivables and other assets	(249)	(118)
Derivative collateral, net	14	(19)
Pension and other postretirement benefit plans	(21)	(23)
Accrued property, income and other taxes, net	(453)	(364)
Accounts payable and other liabilities	19	117
Net cash flows from operating activities	1,525	1,165
Cash flows from investing activities:
Capital expenditures	(1,295)	(1,356)
Purchases of marketable securities	(128)	(188)
Proceeds from sales of marketable securities	104	180
Equity method investments	(26)	(153)
Other, net	(29)	43
Net cash flows from investing activities	(1,374)	(1,474)
Cash flows from financing activities:
Proceeds from BHE senior debt	0	3,231
Repayments of Unsecured Debt	(450)	(350)
Common stock purchases	0	(126)
Proceeds from subsidiary debt	0	1,093
Repayments of subsidiary debt	(26)	(1,347)
Net proceeds from (repayments of) short-term debt	409	(1,109)
Distributions to noncontrolling interests	(115)	(2)
Other, net	(9)	(32)
Net cash flows from financing activities	(191)	1,358
Effect of exchange rate changes	1	(13)
Net change in cash and cash equivalents and restricted cash and cash equivalents	(39)	1,036
Cash and cash equivalents and restricted cash and cash equivalents at beginning of period	1,445	1,268
Cash and cash equivalents and restricted cash and cash equivalents at end of period	1,406	2,304
PacifiCorp [Member]
Adjustments to reconcile net income to net cash flows from operating activities:
Allowance for equity funds	(13)	(21)
Changes in regulatory assets and liabilities	(4)	(16)
Deferred income taxes and amortization of investment tax credits	13	(30)
Other, net	(2)	6
Changes in other operating assets and liabilities, net of effects from acquisitions:
Trade receivables and other assets	61	85
Derivative collateral, net	7	(1)
Accrued property, income and other taxes, net	12	18
Accounts payable and other liabilities	(51)	(3)
Net cash flows from operating activities	469	437
Cash flows from investing activities:
Capital expenditures	(439)	(366)
Other, net	(1)	27
Net cash flows from investing activities	(440)	(339)
Cash flows from financing activities:
Net proceeds from (repayments of) short-term debt	2	(74)
Other, net	(1)	0
Net cash flows from financing activities	1	(74)
Net change in cash and cash equivalents and restricted cash and cash equivalents	30	24
Cash and cash equivalents and restricted cash and cash equivalents at beginning of period	19	36
Cash and cash equivalents and restricted cash and cash equivalents at end of period	49	60
MidAmerican Funding, LLC and Subsidiaries [Member]
Adjustments to reconcile net income to net cash flows from operating activities:
Allowance for equity funds	(6)	(8)
Deferred income taxes and amortization of investment tax credits	153	93
Other, net	(3)	15
Changes in other operating assets and liabilities, net of effects from acquisitions:
Trade receivables and other assets	(298)	16
Derivative collateral, net	(14)	1
Pension and other postretirement benefit plans	1	(6)
Accrued property, income and other taxes, net	(332)	(290)
Accounts payable and other liabilities	6	66
Net cash flows from operating activities	(92)	214
Cash flows from investing activities:
Capital expenditures	(298)	(472)
Purchases of marketable securities	(52)	(127)
Proceeds from sales of marketable securities	47	124
Other, net	0	6
Net cash flows from investing activities	(303)	(469)
Cash flows from financing activities:
Net proceeds from (repayments of) short-term debt	387	50
Other, net	0	(1)
Net cash flows from financing activities	394	52
Net change in cash and cash equivalents and restricted cash and cash equivalents	(1)	(203)
Cash and cash equivalents and restricted cash and cash equivalents at beginning of period	46	331
Cash and cash equivalents and restricted cash and cash equivalents at end of period	45	128
Nevada Power Company [Member]
Adjustments to reconcile net income to net cash flows from operating activities:
Allowance for equity funds	(1)	(2)
Changes in regulatory assets and liabilities	(15)	3
Deferred income taxes and amortization of investment tax credits	(10)	(4)
Other, net	(1)	8
Changes in other operating assets and liabilities, net of effects from acquisitions:
Trade receivables and other assets	41	32
Accrued property, income and other taxes, net	3	(6)
Accounts payable and other liabilities	14	(41)
Net cash flows from operating activities	179	79
Cash flows from investing activities:
Capital expenditures	(106)	(111)
Net cash flows from investing activities	(106)	(111)
Cash flows from financing activities:
Other, net	(5)	(4)
Net cash flows from financing activities	(5)	140
Net change in cash and cash equivalents and restricted cash and cash equivalents	68	108
Cash and cash equivalents and restricted cash and cash equivalents at beginning of period	36	25
Cash and cash equivalents and restricted cash and cash equivalents at end of period	104	133
Sierra Pacific Power Company [Member]
Adjustments to reconcile net income to net cash flows from operating activities:
Allowance for equity funds	(1)	(1)
Changes in regulatory assets and liabilities	(13)	(10)
Deferred income taxes and amortization of investment tax credits	4	(3)
Other, net	0	1
Changes in other operating assets and liabilities, net of effects from acquisitions:
Trade receivables and other assets	8	1
Accrued property, income and other taxes, net	(3)	4
Accounts payable and other liabilities	1	(12)
Net cash flows from operating activities	42	54
Cash flows from investing activities:
Capital expenditures	(61)	(52)
Net cash flows from investing activities	(61)	(52)
Cash flows from financing activities:
Net proceeds from (repayments of) short-term debt	10	0
Other, net	(2)	(1)
Net cash flows from financing activities	8	(1)
Net change in cash and cash equivalents and restricted cash and cash equivalents	(11)	1
Cash and cash equivalents and restricted cash and cash equivalents at beginning of period	26	32
Cash and cash equivalents and restricted cash and cash equivalents at end of period	15	33
Eastern Energy Gas Holdings, LLC [Member]
Cash flows from operating activities:
Net income	191	202
Adjustments to reconcile net income to net cash flows from operating activities:
Depreciation and amortization	80	93
Allowance for equity funds	(2)	(5)
Equity income, net of distributions	(5)	(1)
Changes in regulatory assets and liabilities	6	7
Deferred income taxes and amortization of investment tax credits	30	15
Other, net	0	(1)
Changes in other operating assets and liabilities, net of effects from acquisitions:
Trade receivables and other assets	(56)	357
Derivative collateral, net	2	9
Pension and other postretirement benefit plans	0	(18)
Accrued property, income and other taxes, net	(25)	(17)
Accounts payable and other liabilities	20	26
Net cash flows from operating activities	241	667
Cash flows from investing activities:
Capital expenditures	(55)	(76)
Other, net	(1)	(4)
Net cash flows from investing activities	(56)	(342)
Cash flows from financing activities:
Net cash flows from financing activities	(118)	(306)
Net change in cash and cash equivalents and restricted cash and cash equivalents	67	19
Cash and cash equivalents and restricted cash and cash equivalents at beginning of period	48	39
Cash and cash equivalents and restricted cash and cash equivalents at end of period	$ 115	$ 58

XML 70 R29.htm IDEA: XBRL DOCUMENT

Consolidated Statements of Cash Flows - PacifiCorp - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Net Income (Loss) Attributable to Parent	$ 4	$ 670
Increase (Decrease) in Allowance for Equity Funds Used During Construction	(26)	(34)
Changes in regulatory assets and liabilities	(9)	0
Deferred income taxes and amortization of investment tax credits	(135)	47
Other Noncash Income (Expense)	9	63
Trade receivables and other assets	(249)	(118)
Derivative collateral, net	14	(19)
Accrued property, income and other taxes, net	(453)	(364)
Accounts payable and other liabilities	19	117
Net cash flows from operating activities	1,525	1,165
Capital expenditures	(1,295)	(1,356)
Other, net	(29)	43
Net cash flows from investing activities	(1,374)	(1,474)
Net proceeds from (repayments of) short-term debt	409	(1,109)
Other, net	(9)	(32)
Net cash flows from financing activities	(191)	1,358
Net change in cash and cash equivalents and restricted cash and cash equivalents	(39)	1,036
Cash and cash equivalents and restricted cash and cash equivalents at beginning of period	1,445	1,268
Cash and cash equivalents and restricted cash and cash equivalents at end of period	1,406	2,304
PacifiCorp [Member]
Net Income (Loss) Attributable to Parent	169	176
Depreciation and amortization	264	252
Increase (Decrease) in Allowance for Equity Funds Used During Construction	(13)	(21)
Changes in regulatory assets and liabilities	(4)	(16)
Deferred income taxes and amortization of investment tax credits	13	(30)
Other Noncash Income (Expense)	(2)	6
Trade receivables and other assets	61	85
Increase (Decrease) in Inventories	7	(26)
Derivative collateral, net	7	(1)
Increase (Decrease) in Prepaid Expense and Other Assets	6	(3)
Accrued property, income and other taxes, net	12	18
Accounts payable and other liabilities	(51)	(3)
Net cash flows from operating activities	469	437
Capital expenditures	(439)	(366)
Other, net	(1)	27
Net cash flows from investing activities	(440)	(339)
Net proceeds from (repayments of) short-term debt	2	(74)
Other, net	(1)	0
Net cash flows from financing activities	1	(74)
Net change in cash and cash equivalents and restricted cash and cash equivalents	30	24
Cash and cash equivalents and restricted cash and cash equivalents at beginning of period	19	36
Cash and cash equivalents and restricted cash and cash equivalents at end of period	$ 49	$ 60

XML 71 R30.htm IDEA: XBRL DOCUMENT

Statements of Cash Flows - MEC - USD ($) $ in Millions	3 Months Ended
Statements of Cash Flows - MEC - USD ($) $ in Millions	Mar. 31, 2021	Mar. 31, 2020
Net Income (Loss) Attributable to Parent	$ 4	$ 670
Allowance for equity funds	(26)	(34)
Deferred income taxes and amortization of investment tax credits	(135)	47
Other Noncash Income (Expense)	9	63
Trade receivables and other assets	(249)	(118)
Pension and other postretirement benefit plans	(21)	(23)
Accrued property, income and other taxes, net	(453)	(364)
Accounts payable and other liabilities	19	117
Net cash flows from operating activities	1,525	1,165
Capital expenditures	(1,295)	(1,356)
Purchases of marketable securities	(128)	(188)
Proceeds from sales of marketable securities	104	180
Other, net	(29)	43
Net cash flows from investing activities	(1,374)	(1,474)
Net proceeds from (repayments of) short-term debt	409	(1,109)
Other, net	(9)	(32)
Net cash flows from financing activities	(191)	1,358
Net change in cash and cash equivalents and restricted cash and cash equivalents	(39)	1,036
Cash and cash equivalents and restricted cash and cash equivalents at beginning of period	1,445	1,268
Cash and cash equivalents and restricted cash and cash equivalents at end of period	1,406	2,304
Derivative collateral, net	14	(19)
MidAmerican Energy Company [Member]
Net Income (Loss) Attributable to Parent	147	151
Depreciation and amortization	207	176
Amortization of Utility Plant to Other Operating Expense	8	9
Allowance for equity funds	(6)	(8)
Deferred income taxes and amortization of investment tax credits	154	91
Asset Retirement Obligation, Cash Paid to Settle	(4)	(2)
Other Noncash Income (Expense)	(4)	14
Trade receivables and other assets	(299)	15
Increase (Decrease) in Inventories	46	(6)
Pension and other postretirement benefit plans	1	(6)
Accrued property, income and other taxes, net	(331)	(286)
Accounts payable and other liabilities	10	70
Net cash flows from operating activities	(85)	219
Capital expenditures	(298)	(472)
Purchases of marketable securities	(52)	(127)
Proceeds from sales of marketable securities	47	124
Other, net	0	5
Net cash flows from investing activities	(303)	(470)
Net proceeds from (repayments of) short-term debt	387	50
Other, net	0	(1)
Net cash flows from financing activities	387	49
Net change in cash and cash equivalents and restricted cash and cash equivalents	(1)	(202)
Cash and cash equivalents and restricted cash and cash equivalents at beginning of period	45	330
Cash and cash equivalents and restricted cash and cash equivalents at end of period	44	128
Derivative collateral, net	$ (14)	$ 1

XML 72 R31.htm IDEA: XBRL DOCUMENT

Consolidated Statements of Cash Flows - MidAmerican Funding - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Net Income (Loss) Attributable to Parent	$ 4	$ 670
Allowance for equity funds	(26)	(34)
Deferred income taxes and amortization of investment tax credits	(135)	47
Other Noncash Income (Expense)	9	63
Trade receivables and other assets	(249)	(118)
Derivative collateral, net	14	(19)
Pension and other postretirement benefit plans	(21)	(23)
Accrued property, income and other taxes, net	(453)	(364)
Accounts payable and other liabilities	19	117
Net cash flows from operating activities	1,525	1,165
Capital expenditures	(1,295)	(1,356)
Purchases of marketable securities	(128)	(188)
Proceeds from sales of marketable securities	104	180
Other, net	(29)	43
Net cash flows from investing activities	(1,374)	(1,474)
Net proceeds from (repayments of) short-term debt	409	(1,109)
Other, net	(9)	(32)
Net cash flows from financing activities	(191)	1,358
Net change in cash and cash equivalents and restricted cash and cash equivalents	(39)	1,036
Cash and cash equivalents and restricted cash and cash equivalents at beginning of period	1,445	1,268
Cash and cash equivalents and restricted cash and cash equivalents at end of period	1,406	2,304
MidAmerican Funding, LLC and Subsidiaries [Member]
Net Income (Loss) Attributable to Parent	144	150
Depreciation and amortization	207	176
Amortization of Utility Plant to Other Operating Expense	8	9
Allowance for equity funds	(6)	(8)
Deferred income taxes and amortization of investment tax credits	153	93
Other Noncash Income (Expense)	(3)	15
Trade receivables and other assets	(298)	16
Increase (Decrease) in Inventories	46	(6)
Derivative collateral, net	(14)	1
Pension and other postretirement benefit plans	1	(6)
Accrued property, income and other taxes, net	(332)	(290)
Accounts payable and other liabilities	6	66
Net cash flows from operating activities	(92)	214
Capital expenditures	(298)	(472)
Purchases of marketable securities	(52)	(127)
Proceeds from sales of marketable securities	47	124
Other, net	0	6
Net cash flows from investing activities	(303)	(469)
Increase (Decrease) in Notes Payable, Related Parties, Current	7	3
Net proceeds from (repayments of) short-term debt	387	50
Other, net	0	(1)
Net cash flows from financing activities	394	52
Net change in cash and cash equivalents and restricted cash and cash equivalents	(1)	(203)
Cash and cash equivalents and restricted cash and cash equivalents at beginning of period	46	331
Cash and cash equivalents and restricted cash and cash equivalents at end of period	45	128
Asset Retirement Obligation, Cash Paid to Settle	(4)	(2)
MidAmerican Energy Company [Member]
Net Income (Loss) Attributable to Parent	147	151
Depreciation and amortization	207	176
Amortization of Utility Plant to Other Operating Expense	8	9
Allowance for equity funds	(6)	(8)
Deferred income taxes and amortization of investment tax credits	154	91
Other Noncash Income (Expense)	(4)	14
Trade receivables and other assets	(299)	15
Increase (Decrease) in Inventories	46	(6)
Derivative collateral, net	(14)	1
Pension and other postretirement benefit plans	1	(6)
Accrued property, income and other taxes, net	(331)	(286)
Accounts payable and other liabilities	10	70
Net cash flows from operating activities	(85)	219
Capital expenditures	(298)	(472)
Purchases of marketable securities	(52)	(127)
Proceeds from sales of marketable securities	47	124
Other, net	0	5
Net cash flows from investing activities	(303)	(470)
Net proceeds from (repayments of) short-term debt	387	50
Other, net	0	(1)
Net cash flows from financing activities	387	49
Net change in cash and cash equivalents and restricted cash and cash equivalents	(1)	(202)
Cash and cash equivalents and restricted cash and cash equivalents at beginning of period	45	330
Cash and cash equivalents and restricted cash and cash equivalents at end of period	44	128
Asset Retirement Obligation, Cash Paid to Settle	$ (4)	$ (2)

XML 73 R32.htm IDEA: XBRL DOCUMENT

Consolidated Statements of Cash Flows - NPC - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Net Income (Loss) Attributable to Parent	$ 4	$ 670
Allowance for equity funds	(26)	(34)
Changes in regulatory assets and liabilities	(9)	0
Deferred income taxes and amortization of investment tax credits	(135)	47
Other Noncash Income (Expense)	9	63
Trade receivables and other assets	(249)	(118)
Accrued property, income and other taxes, net	(453)	(364)
Accounts payable and other liabilities	19	117
Net cash flows from operating activities	1,525	1,165
Capital expenditures	(1,295)	(1,356)
Net cash flows from investing activities	(1,374)	(1,474)
Other, net	(9)	(32)
Net cash flows from financing activities	(191)	1,358
Net change in cash and cash equivalents and restricted cash and cash equivalents	(39)	1,036
Cash and cash equivalents and restricted cash and cash equivalents at beginning of period	1,445	1,268
Cash and cash equivalents and restricted cash and cash equivalents at end of period	1,406	2,304
Nevada Power Company [Member]
Net Income (Loss) Attributable to Parent	2	(4)
Depreciation and amortization	101	90
Allowance for equity funds	(1)	(2)
Changes in regulatory assets and liabilities	(15)	3
Deferred income taxes and amortization of investment tax credits	(10)	(4)
Deferred Energy Change	41	4
Other Noncash Income (Expense)	(1)	8
Trade receivables and other assets	41	32
Increase (Decrease) in Inventories	4	(1)
Accrued property, income and other taxes, net	3	(6)
Accounts payable and other liabilities	14	(41)
Net cash flows from operating activities	179	79
Capital expenditures	(106)	(111)
Net cash flows from investing activities	(106)	(111)
Proceeds from long-term debt	0	719
Repayments of BHE senior debt and junior subordinated debentures	0	(575)
Other, net	(5)	(4)
Net cash flows from financing activities	(5)	140
Net change in cash and cash equivalents and restricted cash and cash equivalents	68	108
Cash and cash equivalents and restricted cash and cash equivalents at beginning of period	36	25
Cash and cash equivalents and restricted cash and cash equivalents at end of period	$ 104	$ 133

XML 74 R33.htm IDEA: XBRL DOCUMENT

Consolidated Statements of Cash Flows - SPPC - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Net Income (Loss) Attributable to Parent	$ 4	$ 670
Allowance for equity funds	(26)	(34)
Changes in regulatory assets and liabilities	(9)	0
Deferred income taxes and amortization of investment tax credits	(135)	47
Other Noncash Income (Expense)	(9)	(63)
Trade receivables and other assets	(249)	(118)
Accrued property, income and other taxes, net	(453)	(364)
Accounts payable and other liabilities	19	117
Net cash flows from operating activities	1,525	1,165
Capital expenditures	(1,295)	(1,356)
Net cash flows from investing activities	(1,374)	(1,474)
Net proceeds from (repayments of) short-term debt	409	(1,109)
Other, net	(9)	(32)
Net cash flows from financing activities	(191)	1,358
Net change in cash and cash equivalents and restricted cash and cash equivalents	(39)	1,036
Cash and cash equivalents and restricted cash and cash equivalents at beginning of period	1,445	1,268
Cash and cash equivalents and restricted cash and cash equivalents at end of period	1,406	2,304
Sierra Pacific Power Company [Member]
Net Income (Loss) Attributable to Parent	28	25
Depreciation and amortization	36	34
Allowance for equity funds	(1)	(1)
Changes in regulatory assets and liabilities	(13)	(10)
Deferred income taxes and amortization of investment tax credits	4	(3)
Deferred Energy Change	(18)	14
Amortization of Deferred Charges	(3)	4
Other Noncash Income (Expense)	0	(1)
Trade receivables and other assets	8	1
Increase (Decrease) in Inventories	(3)	3
Accrued property, income and other taxes, net	(3)	4
Accounts payable and other liabilities	1	(12)
Net cash flows from operating activities	42	54
Capital expenditures	(61)	(52)
Net cash flows from investing activities	(61)	(52)
Net proceeds from (repayments of) short-term debt	10	0
Other, net	(2)	(1)
Net cash flows from financing activities	8	(1)
Net change in cash and cash equivalents and restricted cash and cash equivalents	(11)	1
Cash and cash equivalents and restricted cash and cash equivalents at beginning of period	26	32
Cash and cash equivalents and restricted cash and cash equivalents at end of period	$ 15	$ 33

XML 75 R34.htm IDEA: XBRL DOCUMENT

Consolidated Statements of Cash Flows (Unaudited) - EEGH - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Cash flows from operating activities:
Net income	$ 110	$ 673
Adjustments to reconcile net income to net cash flows from operating activities:
Depreciation and amortization	927	821
Allowance for equity funds	(26)	(34)
Equity income, net of distributions	221	29
Changes in regulatory assets and liabilities	(9)	0
Deferred income taxes	(135)	47
Other, net	9	63
Changes in other operating assets and liabilities:
Trade receivables and other assets	(249)	(118)
Derivative collateral, net	14	(19)
Pension and other postretirement benefit plans	(21)	(23)
Accrued property, income and other taxes	(453)	(364)
Accounts payable and other liabilities	19	117
Net cash flows from operating activities	1,525	1,165
Cash flows from investing activities:
Capital expenditures	(1,295)	(1,356)
Other, net	(29)	43
Net cash flows from investing activities	(1,374)	(1,474)
Cash flows from financing activities:
Net cash flows from financing activities	(191)	1,358
Net change in cash and cash equivalents and restricted cash and cash equivalents	(39)	1,036
Cash and cash equivalents and restricted cash and cash equivalents at beginning of period	1,445	1,268
Cash and cash equivalents and restricted cash and cash equivalents at end of period	1,406	2,304
Eastern Energy Gas Holdings, LLC [Member]
Cash flows from operating activities:
Net income	191	202
Adjustments to reconcile net income to net cash flows from operating activities:
Depreciation and amortization	80	93
Allowance for equity funds	(2)	(5)
Equity income, net of distributions	(5)	(1)
Changes in regulatory assets and liabilities	6	7
Deferred income taxes	30	15
Other, net	0	(1)
Changes in other operating assets and liabilities:
Trade receivables and other assets	(56)	357
Derivative collateral, net	2	9
Pension and other postretirement benefit plans	0	(18)
Accrued property, income and other taxes	(25)	(17)
Accounts payable and other liabilities	20	26
Net cash flows from operating activities	241	667
Cash flows from investing activities:
Capital expenditures	(55)	(76)
Loans to affiliates	0	(262)
Other, net	(1)	(4)
Net cash flows from investing activities	(56)	(342)
Cash flows from financing activities:
Net repayments of short-term debt	0	(32)
Repayment of notes payable, net	(9)	(5)
Distributions	(109)	(269)
Net cash flows from financing activities	(118)	(306)
Net change in cash and cash equivalents and restricted cash and cash equivalents	67	19
Cash and cash equivalents and restricted cash and cash equivalents at beginning of period	48	39
Cash and cash equivalents and restricted cash and cash equivalents at end of period	$ 115	$ 58

XML 76 R35.htm IDEA: XBRL DOCUMENT

General	3 Months Ended
General	Mar. 31, 2021
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 and its subsidiaries ("PacifiCorp"), MidAmerican Funding, LLC and its subsidiaries ("MidAmerican Funding") (which primarily consists of MidAmerican Energy Company ("MidAmerican Energy")), NV Energy, Inc. and its subsidiaries ("NV Energy") (which primarily consists of Nevada Power Company and its subsidiaries ("Nevada Power") and Sierra Pacific Power Company and its subsidiaries ("Sierra Pacific")), Northern Powergrid Holdings Company ("Northern Powergrid") (which primarily consists of Northern Powergrid (Northeast) plc and Northern Powergrid (Yorkshire) plc), BHE Pipeline Group, LLC and its subsidiaries (which primarily consists of BHE GT&S, LLC ("BHE GT&S"), Northern Natural Gas Company ("Northern Natural Gas") and Kern River Gas Transmission Company ("Kern River")), BHE Transmission (which consists of BHE Canada Holdings Corporation ("BHE Canada") (which primarily consists of AltaLink, L.P. ("AltaLink")) and BHE U.S. Transmission, LLC), BHE Renewables (which primarily consists of BHE Renewables, LLC and CalEnergy Philippines) and HomeServices of America, Inc. and its subsidiaries ("HomeServices"). The Company, through these locally managed and operated businesses, owns four utility companies in the United States serving customers in 11 states, two electricity distribution companies in Great Britain, five interstate natural gas pipeline companies and interests in a liquefied natural gas ("LNG") export, import and storage facility in the United States, an electric transmission business in Canada, interests in electric transmission businesses in the United States, a renewable energy business primarily investing in wind, solar, geothermal and hydroelectric projects, the largest residential real estate brokerage firm in the United States and one of the largest residential real estate brokerage franchise networks in the United States. 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 March 31, 2021 and for the three-month periods ended March 31, 2021 and 2020. The results of operations for the three-month period ended March 31, 2021 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, 2020 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 during the three-month period ended March 31, 2021.
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 March 31, 2021 and for the three-month periods ended March 31, 2021 and 2020. The Consolidated Statements of Comprehensive Income have been omitted as net income materially equals comprehensive income for the three-month periods ended March 31, 2021 and 2020. The results of operations for the three-month periods ended March 31, 2021 and 2020 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, 2020 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 during the three-month period ended March 31, 2021.
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. MHC's nonregulated subsidiary is Midwest Capital Group, Inc. MHC is the direct, wholly owned subsidiary of MidAmerican Funding, LLC ("MidAmerican Funding"), which is an Iowa limited liability company with Berkshire Hathaway Energy Company ("BHE") as its sole member. BHE is a holding company based in Des Moines, Iowa, that owns subsidiaries principally engaged in energy businesses. BHE is a consolidated subsidiary of Berkshire Hathaway Inc. ("Berkshire Hathaway"). 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 March 31, 2021, and for the three-month periods ended March 31, 2021 and 2020. The Statements of Comprehensive Income have been omitted as net income equals comprehensive income for the three-month period ended March 31, 2021 and 2020. The results of operations for the three-month periods ended March 31, 2021, 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, 2020, 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 three-month period ended March 31, 2021.
MidAmerican Funding, LLC and Subsidiaries [Member]
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. MHC's principal subsidiary is MidAmerican Energy Company ("MidAmerican Energy"), a public utility with electric and natural gas operations, and its direct, wholly owned nonregulated subsidiary is Midwest Capital Group, Inc. 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 March 31, 2021, and for the three-month periods ended March 31, 2021 and 2020. The Consolidated Statements of Comprehensive Income have been omitted as net income materially equals comprehensive income for the three-month period ended March 31, 2021 and 2020. The results of operations for the three-month periods ended March 31, 2021, 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, 2020, 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 three-month period ended March 31, 2021.
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 and its subsidiaries ("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 March 31, 2021 and for the three-month periods ended March 31, 2021 and 2020. The Consolidated Statements of Comprehensive Income have been omitted as net income equals comprehensive income for the three-month periods ended March 31, 2021 and 2020. The results of operations for the three-month period ended March 31, 2021 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, 2020 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 during the three-month period ended March 31, 2021.
Sierra Pacific Power Company [Member]
Segment Reporting Information [Line Items]
General/Organization and Operations	General Sierra Pacific Power Company, together with its subsidiaries ("Sierra Pacific"), is a wholly owned subsidiary of NV Energy, Inc. ("NV Energy"), a holding company that also owns Nevada Power Company and its subsidiaries ("Nevada Power") and certain other subsidiaries. Sierra Pacific is a United States regulated electric utility company serving retail customers, including residential, commercial and industrial customers and regulated retail natural gas customers primarily in northern Nevada. NV Energy is an indirect wholly owned subsidiary of Berkshire Hathaway Energy Company ("BHE"). BHE is a holding company based in Des Moines, Iowa that owns subsidiaries principally engaged in energy businesses. BHE is a consolidated subsidiary of Berkshire Hathaway Inc. ("Berkshire Hathaway"). 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 March 31, 2021 and for the three-month periods ended March 31, 2021 and 2020. The Consolidated Statements of Comprehensive Income have been omitted as net income equals comprehensive income for the three-month periods ended March 31, 2021 and 2020. The results of operations for the three-month period ended March 31, 2021 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 Sierra Pacific's Annual Report on Form 10-K for the year ended December 31, 2020 describes the most significant accounting policies used in the preparation of the unaudited Consolidated Financial Statements. There have been no significant changes in Sierra Pacific's assumptions regarding significant accounting estimates and policies during the three-month period ended March 31, 2021.
Eastern Energy Gas Holdings, LLC [Member]
Segment Reporting Information [Line Items]
General/Organization and Operations	General Eastern Energy Gas Holdings, LLC and its subsidiaries ("Eastern Energy Gas") is a holding company that conducts business activities consisting of Federal Energy Regulatory Commission ("FERC")-regulated interstate natural gas transportation pipeline and underground storage operations in the eastern region of the United States and operates Cove Point LNG, LP ("Cove Point"), a liquefied natural gas ("LNG") export, import and storage facility. Eastern Energy Gas owns 100% of the general partner interest and 25% of the limited partnership interest in Cove Point. In addition, Eastern Energy Gas owns a 50% noncontrolling interest in Iroquois Gas Transmission System, L.P. ("Iroquois"), a 416-mile FERC-regulated interstate natural gas transportation pipeline. In July 2020, Dominion Energy, Inc. ("DEI") entered into an agreement to sell substantially all of its gas transmission and storage operations, including Eastern Energy Gas and a 25% limited partnership interest in Cove Point, to Berkshire Hathaway Energy Company ("BHE"). Approval of the transaction under the Hart-Scott-Rodino Act was not obtained within 75 days and DEI and BHE mutually agreed to a dual-phase closing consisting of two separate disposal groups identified as the acquisition of substantially all of the natural gas transmission and storage business of DEI and Dominion Energy Questar Corporation, exclusive of Dominion Energy Questar Pipeline, LLC and related entities (the "Questar Pipeline Group") (the "GT&S Transaction") and the proposed sale of the Questar Pipeline Group by DEI to BHE pursuant to a purchase and sale agreement entered into on October 5, 2020 ("Q-Pipe Transaction"). The Q-Pipe Transaction is currently anticipated to close in the first half of 2021, contingent on clearance or approval under the Hart-Scott-Rodino Act, and other customary closing and regulatory conditions. Prior to the completion of the GT&S Transaction, Eastern Energy Gas finalized a restructuring whereby Eastern Energy Gas distributed the Questar Pipeline Group and a 50% noncontrolling interest in Cove Point to DEI. This restructuring was accounted for by Eastern Energy Gas as a reorganization of entities under common control and the disposition was reflected as an equity transaction. The disposition was not reported as a discontinued operation as the disposal did not represent a strategic shift in the way management had intended to run the business. On November 1, 2020, BHE completed the GT&S Transaction. As a result of the GT&S Transaction, Eastern Energy Gas became an indirect wholly owned subsidiary of BHE. BHE is a holding company based in Des Moines, Iowa that owns subsidiaries principally engaged in the energy industry. 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 March 31, 2021 and for the three-month periods ended March 31, 2021 and 2020. The results of operations for the three-month periods ended March 31, 2021 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 Eastern Energy Gas' Annual Report on Form 10-K for the year ended December 31, 2020 describes the most significant accounting policies used in the preparation of the unaudited Consolidated Financial Statements. There have been no significant changes in Eastern Energy Gas' assumptions regarding significant accounting estimates and policies during the three-month period ended March 31, 2021.

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Business Combination Disclosure Business Combination Disclosure (Notes)

3 Months Ended

Mar. 31, 2021

Business Combinations [Abstract]

Business Acquisition

BHE GT&S Acquisition

Transaction Description

Preliminary Allocation of Purchase Price

The following table summarizes the preliminary fair values of the assets acquired and liabilities assumed as of the acquisition date (in millions):


	Fair Value

Current assets, including cash and cash equivalents of $104	$	569
Property, plant and equipment	9,254
Goodwill	1,732
Regulatory assets	108
Deferred income taxes	275
Other long-term assets	1,424
Total assets	13,362

Current liabilities, including current portion of long-term debt of $1,200	1,567
Long-term debt, less current portion	4,415
Regulatory liabilities	661
Other long-term liabilities	289
Total liabilities	6,932
Noncontrolling interest	3,916
Net assets acquired	$	2,514

Goodwill

Pro Forma Financial Information


	Three-Month Period
	Ended March 31, 2020

Operating revenue	$	5,056

Net income attributable to BHE shareholders	$	773

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Property, Plant and Equipment, Net

3 Months Ended

Mar. 31, 2021

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


		As of
	Depreciable	March 31,		December 31,
	Life	2021		2020
Regulated assets:
Utility generation, transmission and distribution systems	5-80 years	$	87,898	$	86,730
Interstate natural gas pipeline assets	3-80 years	16,712		16,667
		104,610		103,397
Accumulated depreciation and amortization		(31,653)		(30,662)
Regulated assets, net		72,957		72,735

Nonregulated assets:
Independent power plants	5-30 years	7,034		7,012
Other assets	3-40 years	5,794		5,659
		12,828		12,671
Accumulated depreciation and amortization		(2,337)		(2,586)
Nonregulated assets, net		10,491		10,085

Net operating assets		83,448		82,820
Construction work-in-progress		3,309		3,308
Property, plant and equipment, net		$	86,757	$	86,128

Construction work-in-progress includes $2.9 billion as of March 31, 2021 and $3.2 billion as of December 31, 2020, related to the construction of regulated assets.

Property, Plant and Equipment, NetRefer to Note 3 of MidAmerican Energy's Notes to Financial Statements.

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


		As of
		March 31,		December 31,
	Depreciable Life	2021		2020
Utility plant in service, net:
Generation	20-70 years	$	17,083	$	16,980
Transmission	52-75 years	2,372		2,365
Electric distribution	20-75 years	4,433		4,369
Natural gas distribution	29-75 years	1,970		1,955
Utility plant in service		25,858		25,669
Accumulated depreciation and amortization		(7,061)		(6,902)
Utility plant in service, net		18,797		18,767
Nonregulated property, net:
Nonregulated property gross	20-50 years	7		7
Accumulated depreciation and amortization		(1)		(1)
Nonregulated property, net		6		6
		18,803		18,773
Construction work-in-progress		420		506
Property, plant and equipment, net		$	19,223	$	19,279

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


		As of
		March 31,		December 31,
	Depreciable Life	2021		2020
Utility Plant:
Generation	15 - 59 years	$	13,355	$	12,861
Transmission	60 - 90 years	7,686		7,632
Distribution	20 - 75 years	7,725		7,660
Intangible plant(1)	5 - 75 years	1,069		1,054
Other	5 - 60 years	1,513		1,510
Utility plant in service		31,348		30,717
Accumulated depreciation and amortization		(9,980)		(9,838)
Utility plant in service, net		21,368		20,879
Other non-regulated, net of accumulated depreciation and amortization	14 - 95 years	9		9
Plant, net		21,377		20,888
Construction work-in-progress		1,158		1,542
Property, plant and equipment, net		$	22,535	$	22,430

(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	March 31,		December 31,
		2021		2020
Utility plant:
Generation	30 - 55 years	$	3,691	$	3,690
Transmission	45 - 70 years	1,465		1,468
Distribution	20 - 65 years	3,803		3,771
General and intangible plant	5 - 65 years	798		791
Utility plant		9,757		9,720
Accumulated depreciation and amortization		(3,224)		(3,162)
Utility plant, net		6,533		6,558
Other non-regulated, net of accumulated depreciation and amortization	45 years	1		1
Plant, net		6,534		6,559
Construction work-in-progress		217		142
Property, plant and equipment, net		$	6,751	$	6,701

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


		As of
	Depreciable Life	March 31,		December 31,
		2021		2020
Utility plant:
Electric generation	25 - 60 years	$	1,131	$	1,130
Electric transmission	50 - 100 years	917		908
Electric distribution	20 - 100 years	1,763		1,754
Electric general and intangible plant	5 - 70 years	193		189
Natural gas distribution	35 - 70 years	431		429
Natural gas general and intangible plant	5 - 70 years	15		15
Common general	5 - 70 years	357		355
Utility plant		4,807		4,780
Accumulated depreciation and amortization		(1,783)		(1,755)
Utility plant, net		3,024		3,025
Other non-regulated, net of accumulated depreciation and amortization	70 years	2		2
Plant, net		3,026		3,027
Construction work-in-progress		162		137
Property, plant and equipment, net		$	3,188	$	3,164

Restricted Cash and Cash Equivalents Items [Line Items]

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


		As of
		March 31,		December 31,
	Depreciable Life	2021		2020
Utility Plant:

Interstate natural gas pipeline assets	24 - 43 years	$	8,385	$	8,382
Intangible plant	5 - 10 years	114		115
Utility plant in service		8,499		8,497
Accumulated depreciation and amortization		(2,792)		(2,759)
Utility plant in service, net		5,707		5,738

Nonutility Plant:

LNG facility	40 years	4,460		4,454
Intangible plant	14 years	25		25
Nonutility plant in service		4,485		4,479
Accumulated depreciation and amortization		(320)		(283)
Nonutility plant in service, net		4,165		4,196

Plant, net		9,872		9,934
Construction work- in-progress		227		210
Property, plant and equipment, net		$	10,099	$	10,144

Construction work-in-progress includes $211 million and $196 million as of March 31, 2021 and December 31, 2020, respectively, related to the construction of utility plant.

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Investments and Restricted Cash and Cash Equivalents and Investments

3 Months Ended

Mar. 31, 2021

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
	March 31,		December 31,
	2021		2020
Investments:
BYD Company Limited common stock	$	4,773	$	5,897
Rabbi trusts	452		440
Other	288		263
Total investments	5,513		6,600

Equity method investments:
BHE Renewables tax equity investments	5,399		5,626
Iroquois Gas Transmission System, L.P.	586		580
Electric Transmission Texas, LLC	581		594
JAX LNG, LLC	80		75
Bridger Coal Company	68		74
Other	113		118
Total equity method investments	6,827		7,067

Restricted cash and cash equivalents and investments:
Quad Cities Station nuclear decommissioning trust funds	697		676
Other restricted cash and cash equivalents	130		155
Total restricted cash and cash equivalents and investments	827		831

Total investments and restricted cash and cash equivalents and investments	$	13,167	$	14,498

Reflected as:
Current assets	$	157	$	178
Noncurrent assets	13,010		14,320
Total investments and restricted cash and cash equivalents and investments	$	13,167	$	14,498

Investments

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


	Three-Month Periods
	Ended March 31,
		2021		2020
Unrealized (losses) gains recognized on marketable securities still held at the reporting date		$	(1,119)	$	25
Net gains recognized on marketable securities sold during the period		1		2
(Losses) gains on marketable securities, net		$	(1,118)	$	27

Equity Method Investments

Cash and Cash Equivalents and Restricted Cash and Cash Equivalents


	As of
	March 31,		December 31,
	2021		2020
Cash and cash equivalents	$	1,276	$	1,290
Restricted cash and cash equivalents	117		140
Investments and restricted cash and cash equivalents and investments	13		15
Total cash and cash equivalents and restricted cash and cash equivalents	$	1,406	$	1,445

Restricted Cash and Cash Equivalents Items [Line Items]

Investments and Restricted Cash and Cash Equivalents and Investments

Investments and Restricted Cash and Cash Equivalents

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


	As of
	March 31,		December 31,
	2021		2020
Investments:
Investment funds	$	12	$	—


Equity method investments:
Iroquois	250		244



Total investments	262		244

Restricted cash and cash equivalents:
Customer deposits	9		13
Total restricted cash and cash equivalents	9		13

Total investments and restricted cash and cash equivalents	$	271	$	257

Reflected as:
Current assets	$	9	$	13
Noncurrent assets	262		244
Total investments and restricted cash and cash equivalents	$	271	$	257

Equity Method Investments

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 March 31, 2021 and December 31, 2020 consist substantially of customer deposits as allowed under the FERC gas tariffs. A reconciliation of cash and cash equivalents and restricted cash and cash equivalents as of March 31, 2021 and December 31, 2020, 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
	March 31,		December 31,
	2021		2020

Cash and cash equivalents	$	106	$	35
Restricted cash and cash equivalents	9		13
Total cash and cash equivalents and restricted cash and cash equivalents	$	115	$	48

XML 80 R39.htm IDEA: XBRL DOCUMENT

Regulatory Matters	3 Months Ended
Regulatory Matters	Mar. 31, 2021
MidAmerican Energy Company [Member]
Schedule Of Regulatory Assets and Liabilities [Line Items]
Regulatory Matters	Regulatory Matters Natural Gas Purchased for Resale In February 2021, severe cold weather over the central United States caused disruptions in natural gas supply from the southern part of the United States. These disruptions, combined with increased demand, resulted in historically high prices for natural gas purchased for resale to MidAmerican Energy's retail customers and caused an approximate $245 million increase in natural gas costs above those normally expected. These increased costs are reflected in cost of natural gas purchased for resale and other on the Statement of Operations and their recovery through the Purchased Gas Adjustment Clause is reflected in regulated natural gas and other revenue. To mitigate the impact to customers, the Iowa Utilities Board ordered the recovery of these higher costs to be applied to natural gas sales over the period April 2021 through April 2022. While sufficient liquidity is available to MidAmerican Energy, the increased costs and longer recovery period resulted in higher working capital requirements during three-month period ended March 31, 2021.
MidAmerican Funding, LLC and Subsidiaries [Member]
Schedule Of Regulatory Assets and Liabilities [Line Items]
Regulatory Matters	Regulatory MattersRefer to Note 4 of MidAmerican Energy's Notes to Financial Statements.
Eastern Energy Gas Holdings, LLC [Member]
Schedule Of Regulatory Assets and Liabilities [Line Items]
Regulatory Matters	Regulatory Matters Eastern Gas Transmission and Storage, Inc. In July 2017, the FERC audit staff communicated to Eastern Gas Transmission and Storage, Inc. ("EGTS") that it had substantially completed an audit of EGTS' compliance with the accounting and reporting requirements of the FERC's Uniform System of Accounts and provided a description of matters and preliminary recommendations. In November 2017, the FERC audit staff issued its audit report. In December 2017, EGTS provided its response to the audit report. EGTS requested FERC review of the contested findings and submitted its plan for compliance with the uncontested portions of the report. EGTS reached resolution of certain matters with the FERC in the fourth quarter of 2018. EGTS recognized a charge of $129 million ($94 million after-tax) for the year ended December 31, 2018 for a disallowance of plant, originally established beginning in 2012, for the resolution of one matter with the FERC. In December 2020, the FERC issued a final ruling on the remaining matter, which resulted in a $43 million ($31 million after-tax) charge for disallowance of capitalized allowance for funds used during construction. As a condition of the December 2020 ruling, EGTS will file its proposed accounting entries and supporting documentation with the FERC by the second quarter of 2021; however, EGTS does not expect a material change from the charge recognized. Cove Point In January 2020, pursuant to the terms of a previous settlement, Cove Point filed a general rate case for its FERC-jurisdictional services, with proposed rates to be effective March 1, 2020. Cove Point proposed an annual cost-of-service of $182 million. In February 2020, the FERC approved suspending the changes in rates for five months following the proposed effective date, until August 1, 2020, subject to refund. In November 2020, Cove Point reached an agreement in principle with the active participants in the general rate case proceeding. Under the terms of the agreement in principle, Cove Point's rates effective August 1, 2020 result in an increase to annual revenues of $4 million and a decrease in annual depreciation expense of $1 million, compared to the rates in effect prior to August 1, 2020. The interim settlement rates were implemented November 1, 2020, and Cove Point's provision for rate refunds for August 2020 through October 2020 totaled $7 million. The agreement in principle was reflected in a stipulation and agreement filed with the FERC in January 2021. In March 2021, the FERC approved the stipulation and agreement and the rate refunds to customers were processed in late April 2021.

XML 81 R40.htm IDEA: XBRL DOCUMENT

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

3 Months Ended

Mar. 31, 2021

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 March 31, 2021 and December 31, 2020, 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 March 31, 2021 and December 31, 2020, 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
	March 31,		December 31,
	2021		2020
Cash and cash equivalents	$	8	$	19
Restricted cash and cash equivalents included in other current assets	7		7
Total cash and cash equivalents and restricted cash and cash equivalents	$	15	$	26

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 March 31, 2021 and December 31, 2020, 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 March 31, 2021 and December 31, 2020, 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
	March 31,		December 31,
	2021		2020
Cash and cash equivalents	$	92	$	25
Restricted cash and cash equivalents included in other current assets	12		11
Total cash and cash equivalents and restricted cash and cash equivalents	$	104	$	36

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 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 March 31, 2021 and December 31, 2020, 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
	March 31,		December 31,
	2021		2020
Cash and cash equivalents	$	43	$	13
Restricted cash included in other current assets	3		4
Restricted cash included in other assets	3		2
Total cash and cash equivalents and restricted cash and cash equivalents	$	49	$	19

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 March 31, 2021 and December 31, 2020, consist substantially of funds restricted for wildlife preservation and, as of December 31, 2020, 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 March 31, 2021 and December 31, 2020, 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
	March 31,		December 31,
	2021		2020

Cash and cash equivalents	$	38	$	39
Restricted cash and cash equivalents in other current assets	7		7
Total cash and cash equivalents and restricted cash and cash equivalents	$	45	$	46

Condensed Cash Flow Statements, Captions [Line Items]

Schedule of Effective Income Tax Rate Reconciliation [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 March 31, 2021 and December 31, 2020, consist substantially of funds restricted for wildlife preservation and, as of December 31, 2020, 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 March 31, 2021 and December 31, 2020, 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
	March 31,		December 31,
	2021		2020

Cash and cash equivalents	$	37	$	38
Restricted cash and cash equivalents in other current assets	7		7
Total cash and cash equivalents and restricted cash and cash equivalents	$	44	$	45

XML 82 R41.htm IDEA: XBRL DOCUMENT

Recent Financing Transactions	3 Months Ended
Recent Financing Transactions	Mar. 31, 2021
Debt Instrument [Line Items]
Recent Financing Transactions	Recent Financing Transactions Long-Term Debt In April 2021, Northern Natural Gas issued $550 million of 3.40% Senior Bonds due October 2051. Northern Natural Gas used the net proceeds to early redeem in April 2021 all of its $200 million, 4.25% Senior Notes originally due June 2021 and for general corporate purposes. Credit Facilities In April 2021, AltaLink Investments, L.P. extended, with lender consent, the expiration date for its existing C$200 million one-year revolving credit facility to April 2022, by exercising a one-year extension option.

XML 83 R42.htm IDEA: XBRL DOCUMENT

Income Taxes

3 Months Ended

Mar. 31, 2021

A reconciliation of the federal statutory income tax rate to the effective income tax rate applicable to income before income tax benefit is as follows:


	Three-Month Periods
	Ended March 31,
		2021		2020

Federal statutory income tax rate		21	%	21	%
Income tax credits		136		(46)
State income tax, net of federal income tax impacts		21		—
Income tax effect of foreign income		6		(3)
Effects of ratemaking		10		(8)
Equity income		15		(1)
Noncontrolling interest		9		—
Other, net		(1)		1
Effective income tax rate		217	%	(36)	%

Schedule of Effective Income Tax Rate Reconciliation [Line Items]

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
	Ended March 31,
		2021		2020

Federal statutory income tax rate		21	%	21	%
State income tax, net of federal income tax benefit		3		3
Federal income tax credits		(20)		(11)
Effects of ratemaking		(13)		(22)

Other		2		—
Effective income tax rate		(7)	%	(9)	%

Schedule of Effective Income Tax Rate Reconciliation [Line Items]

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
	Ended March 31,
	2021		2020

Federal statutory income tax rate	21	%	21	%


Effects of ratemaking	(10)		(8)


Other	2		(2)
Effective income tax rate	13	%	11	%

Schedule of Effective Income Tax Rate Reconciliation [Line Items]

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
	Ended March 31,
		2021		2020

Federal statutory income tax rate		21	%	21	%
Income tax credits		2,400		(430)
State income tax, net of federal income tax impacts		(29)		(28)
Effects of ratemaking		(186)		(3)
Other, net		(6)		1
Effective income tax rate		2,200	%	(439)	%

Schedule of Effective Income Tax Rate Reconciliation [Line Items]

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
	Ended March 31,
		2021		2020

Federal statutory income tax rate		21	%	21	%
Income tax credits		1,400		(463)
State income tax, net of federal income tax impacts		(8)		(31)
Effects of ratemaking		(108)		(3)
Other, net		(5)		(1)
Effective income tax rate		1,300	%	(477)	%

Income tax credits relate primarily to production tax credits ("PTCs") from MidAmerican Energy's wind-powered generating facilities. Federal renewable electricity PTCs are earned as energy from qualifying wind-powered generating facilities is produced and sold and are based on a per-kilowatt hour rate pursuant to the applicable federal income tax law. MidAmerican Funding recognizes its renewable electricity PTCs throughout the year based on when the credits are earned and excludes them from the annual effective tax rate that is the basis for the interim recognition of other income tax expense. Wind-powered generating facilities are eligible for the credits for 10 years from the date the qualifying generating facilities are placed in-service. PTCs for the three-month periods ended March 31, 2021 and 2020 totaled $151 million and $120 million, respectively.

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. The timing of MidAmerican Funding's income tax cash flows from period to period can be significantly affected by the estimated federal income tax payment methods and assumptions for each payment date. MidAmerican Funding made no cash payments for income tax to BHE for the three-month period ended March 31, 2021, and made net cash payments for income tax to BHE totaling $47 million for the three-month period ended March 31, 2020.

Schedule of Effective Income Tax Rate Reconciliation [Line Items]

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
	Ended March 31,
	2021		2020

Federal statutory income tax rate	21	%	21	%
State income tax, net of federal income tax benefit	3		3



Equity interest	2		1
Effects of ratemaking	(1)		(1)





Absence of noncontrolling interest	(11)		(3)

Other, net	(1)		1
Effective income tax rate	13	%	22	%

The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.

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Employee Benefit Plans

3 Months Ended

Mar. 31, 2021

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
	Ended March 31,
		2021		2020
Pension:
Service cost		$	7	$	3
Interest cost		20		23
Expected return on plan assets		(33)		(35)
Net amortization		6		9
Net periodic benefit cost		$	—	$	—

Other postretirement:
Service cost		$	2	$	1
Interest cost		5		6
Expected return on plan assets		(5)		(9)
Net amortization		(1)		(1)
Net periodic benefit cost (credit)		$	1	$	(3)

Foreign Operations

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


	Three-Month Periods
	Ended March 31,
		2021		2020

Service cost		$	4	$	4
Interest cost		8		10
Expected return on plan assets		(28)		(25)

Net amortization		14		10
Net periodic benefit credit		$	(2)	$	(1)

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


	Three-Month Periods
	Ended March 31,
		2021		2020
Pension:
Service cost		$	—	$	—
Interest cost		7		9
Expected return on plan assets		(13)		(14)
Net amortization		5		5
Net periodic benefit credit		$	(1)	$	—

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

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 $1 million, respectively, during 2021. As of March 31, 2021, $1 million of contributions had been made to the pension plans.

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


	Three-Month Periods
	Ended March 31,
		2021		2020
Pension:
Service cost		$	5	$	1
Interest cost		6		6
Expected return on plan assets		(9)		(10)

Net periodic benefit cost (credit)		$	2	$	(3)

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

Employee Benefit PlansRefer to Note 6 of MidAmerican Energy's Notes to Financial Statements.

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


	As of
	March 31,		December 31,
	2021		2020
Qualified Pension Plan:
Other non-current assets	$	9	$	8



Non-Qualified Pension Plans:

Other current liabilities	(1)		(1)
Other long-term liabilities	(9)		(9)

Other Postretirement Plans:
Other non-current assets	4		4

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


	As of
	March 31,		December 31,
	2021		2020
Qualified Pension Plan:

Other non-current assets	$	27	$	26



Non-Qualified Pension Plans:


Other current liabilities	(1)		(1)
Other long-term liabilities	(8)		(8)

Other Postretirement Plans:



Other long-term liabilities	(14)		(13)

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


	Three-Month Periods
	Ended March 31,
		2021		2020
Pension:
Service cost		$	—	$	1
Interest cost		—		3
Expected return on plan assets		—		(14)
Net amortization		—		2
Net periodic benefit cost (credit)		$	—	$	(8)

Other Postretirement:
Service cost		$	—	$	1
Interest cost		—		1
Expected return on plan assets		—		(5)
Net amortization		—		(1)
Net periodic benefit cost (credit)		$	—	$	(4)

The entire disclosure for retirement benefits.

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Risk Management and Hedging Activities

3 Months Ended

Mar. 31, 2021

Risk Management and Hedging Activities

Derivative [Line Items]

There have been no significant changes in PacifiCorp's accounting policies related to derivatives. Refer to Note 7 for additional information on derivative contracts.


	Other				Other		Other
	Current		Other		Current		Long-term
	Assets		Assets		Liabilities		Liabilities		Total
As of March 31, 2021
Not designated as hedging contracts(1):
Commodity assets	$	45	$	6	$	2	$	—	$	53
Commodity liabilities	(2)		—		(27)		(24)		(53)
Total	43		6		(25)		(24)		—

Total derivatives	43		6		(25)		(24)		—
Cash collateral receivable	—		—		13		4		17
Total derivatives - net basis	$	43	$	6	$	(12)	$	(20)	$	17

As of December 31, 2020
Not designated as hedging contracts(1):
Commodity assets	$	29	$	6	$	1	$	—	$	36
Commodity liabilities	(2)		—		(23)		(28)		(53)
Total	27		6		(22)		(28)		(17)

Total derivatives	27		6		(22)		(28)		(17)
Cash collateral receivable	—		—		15		9		24
Total derivatives - net basis	$	27	$	6	$	(7)	$	(19)	$	7


	Three-Month Periods
	Ended March 31,
		2021		2020

Beginning balance		$	17	$	62
Changes in fair value		(17)		34
Net gains reclassified to operating revenue		—		8
Net losses reclassified to cost of fuel and energy		—		(20)
Ending balance		$	—	$	84

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	March 31,	December 31,
	Measure	2021	2020

Electricity sales, net	Megawatt hours	—	(1)
Natural gas purchases	Decatherms	114	100

Credit Risk

Collateral and Contingent Features

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Fair Value Measurements

3 Months Ended

Mar. 31, 2021

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.

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 March 31, 2021
Assets:
Commodity derivatives	$	1	$	72	$	154	$	(18)	$	209
Foreign currency exchange rate derivatives	—		12		—		—		12
Interest rate derivatives	—		33		47		—		80
Mortgage loans held for sale	—		2,065		—		—		2,065
Money market mutual funds(2)	807		—		—		—		807
Debt securities:
United States government obligations	210		—		—		—		210
International government obligations	—		5		—		—		5
Corporate obligations	—		71		—		—		71
Municipal obligations	—		2		—		—		2
Agency, asset and mortgage-backed obligations	—		5		—		—		5
Equity securities:
United States companies	395		—		—		—		395
International companies	4,780		—		—		—		4,780
Investment funds	256		—		—		—		256
	$	6,449	$	2,265	$	201	$	(18)	$	8,897
Liabilities:
Commodity derivatives	$	—	$	(90)	$	(30)	$	39	$	(81)
Foreign currency exchange rate derivatives	—		(1)		—		—		(1)
Interest rate derivatives	(3)		(14)		(6)		—		(23)
	$	(3)	$	(105)	$	(36)	$	39	$	(105)


	Input Levels for Fair Value Measurements
	Level 1		Level 2		Level 3		Other(1)		Total
As of December 31, 2020
Assets:
Commodity derivatives	$	1	$	73	$	135	$	(21)	$	188
Foreign currency exchange rate derivatives	—		20		—		—		20
Interest rate derivatives	—		—		62		—		62
Mortgage loans held for sale	—		2,001		—		—		2,001
Money market mutual funds(2)	873		—		—		—		873
Debt securities:
United States government obligations	200		—		—		—		200
International government obligations	—		5		—		—		5
Corporate obligations	—		73		—		—		73
Municipal obligations	—		2		—		—		2
Agency, asset and mortgage-backed obligations	—		6		—		—		6
Equity securities:
United States companies	381		—		—		—		381
International companies	5,906		—		—		—		5,906
Investment funds	201		—		—		—		201
	$	7,562	$	2,180	$	197	$	(21)	$	9,918
Liabilities:
Commodity derivatives	$	(1)	$	(90)	$	(19)	$	56	$	(54)
Foreign currency exchange rate derivatives	—		(2)		—		—		(2)
Interest rate derivatives	(5)		(60)		—		—		(65)
	$	(6)	$	(152)	$	(19)	$	56	$	(121)

(1)Represents netting under master netting arrangements and a net cash collateral receivable of $21 million and $35 million as of March 31, 2021 and December 31, 2020, respectively.

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
	Ended March 31,
				Interest
		Commodity		Rate
		Derivatives		Derivatives
2021:
Beginning balance		$	116	$	62
Changes included in earnings(1)		(6)		(21)
Changes in fair value recognized in OCI		(1)		—
Changes in fair value recognized in net regulatory assets		16		—



Settlements		(1)		—

Ending balance		$	124	$	41







2020:
Beginning balance	$	97	$	14
Changes included in earnings(1)	(3)		31

Changes in fair value recognized in net regulatory assets	(40)		—
Purchases	2		—

Settlements	(4)		—

Ending balance	$	52	$	45

(1)Changes included in earnings for interest rate derivatives are reported net of amounts related to the satisfaction of the associated loan commitment.


	As of March 31, 2021				As of December 31, 2020
	Carrying		Fair		Carrying		Fair
	Value		Value		Value		Value

Long-term debt	$	49,461	$	55,926	$	49,866	$	60,633

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.

The following table presents PacifiCorp's assets and liabilities recognized on the Consolidated Balance Sheets and measured at fair value on a recurring basis (in millions):


	Input Levels for Fair Value Measurements
	Level 1		Level 2		Level 3		Other(1)		Total
As of March 31, 2021
Assets:
Commodity derivatives	$	—	$	53	$	—	$	(4)	$	49
Money market mutual funds(2)	36		—		—		—		36
Investment funds	30		—		—		—		30
	$	66	$	53	$	—	$	(4)	$	115

Liabilities - Commodity derivatives	$	—	$	(53)	$	—	$	21	$	(32)

As of December 31, 2020
Assets:
Commodity derivatives	$	—	$	36	$	—	$	(3)	$	33
Money market mutual funds(2)	6		—		—		—		6
Investment funds	25		—		—		—		25
	$	31	$	36	$	—	$	(3)	$	64

Liabilities - Commodity derivatives	$	—	$	(53)	$	—	$	27	$	(26)

(1)Represents netting under master netting arrangements and a net cash collateral receivable of $17 million and $24 million as of March 31, 2021 and December 31, 2020, 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 6 for further discussion regarding PacifiCorp's risk management and hedging activities.


	As of March 31, 2021				As of December 31, 2020
	Carrying		Fair		Carrying		Fair
	Value		Value		Value		Value

Long-term debt	$	8,613	$	10,198	$	8,612	$	10,995

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 MidAmerican Energy has the ability to access at the measurement date.

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 March 31, 2021:
Assets:
Commodity derivatives	$	—	$	3	$	2	$	(2)	$	3
Money market mutual funds(2)	38		—		—		—		38
Debt securities:
United States government obligations	210		—		—		—		210
International government obligations	—		5		—		—		5
Corporate obligations	—		71		—		—		71
Municipal obligations	—		2		—		—		2
Agency, asset and mortgage-backed obligations	—		5		—		—		5
Equity securities:
United States companies	395		—		—		—		395
International companies	8		—		—		—		8
Investment funds	24		—		—		—		24
	$	675	$	86	$	2	$	(2)	$	761

Liabilities - commodity derivatives	$	—	$	(1)	$	(1)	$	2	$	—


	Input Levels for Fair Value Measurements
	Level 1		Level 2		Level 3		Other(1)		Total
As of December 31, 2020:
Assets:
Commodity derivatives	$	—	$	4	$	5	$	(5)	$	4
Money market mutual funds(2)	41		—		—		—		41
Debt securities:
United States government obligations	200		—		—		—		200
International government obligations	—		5		—		—		5
Corporate obligations	—		73		—		—		73
Municipal obligations	—		2		—		—		2
Agency, asset and mortgage-backed obligations	—		6		—		—		6
Equity securities:
United States companies	381		—		—		—		381
International companies	9		—		—		—		9
Investment funds	17		—		—		—		17
	$	648	$	90	$	5	$	(5)	$	738

Liabilities - commodity derivatives	$	—	$	(4)	$	(3)	$	5	$	(2)

(1)Represents netting under master netting arrangements and a net cash collateral receivable of $— million as of March 31, 2021 and December 31, 2020, 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 March 31, 2021				As of December 31, 2020
	Carrying Value		Fair Value		Carrying Value		Fair Value

Long-term debt	$	7,224	$	8,305	$	7,210	$	9,130

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


	As of March 31, 2021				As of December 31, 2020
	Carrying Value		Fair Value		Carrying Value		Fair Value

Long-term debt	$	7,464	$	8,622	$	7,450	$	9,466

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.

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 March 31, 2021
Assets:
Commodity derivatives	$	—	$	—	$	48	$	48
Money market mutual funds(1)	86		—		—		86
Investment funds	2		—		—		2
	$	88	$	—	$	48	$	136

Liabilities - commodity derivatives	$	—	$	—	$	(21)	$	(21)

As of December 31, 2020
Assets:
Commodity derivatives	$	—	$	—	$	26	$	26
Money market mutual funds(1)	21		—		—		21
Investment funds	2		—		—		2
	$	23	$	—	$	26	$	49

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

(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 March 31, 2021 and December 31, 2020, had an immaterial impact to the fair value of its derivative contracts. As such, Nevada Power considers its derivative contracts to be valued using Level 3 inputs.


	Three-Month Periods
	Ended March 31,
	2021		2020

Beginning balance	$	15	$	(8)
Changes in fair value recognized in regulatory assets	11		(31)

Settlements	1		1
Ending balance	$	27	$	(38)


	As of March 31, 2021				As of December 31, 2020
	Carrying		Fair		Carrying		Fair
	Value		Value		Value		Value

Long-term debt	$	2,497	$	2,991	$	2,496	$	3,245

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.

The following table presents Sierra Pacific'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 March 31, 2021
Assets:
Commodity derivatives	$	—	$	—	$	16	$	16
Money market mutual funds(1)	5		—		—		5

	$	5	$	—	$	16	$	21

Liabilities - commodity derivatives	$	—	$	—	$	(4)	$	(4)

As of December 31, 2020
Assets:
Commodity derivatives	$	—	$	—	$	9	$	9
Money market mutual funds(1)	17		—		—		17

	$	17	$	—	$	9	$	26

Liabilities - commodity derivatives	$	—	$	—	$	(2)	$	(2)

(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.


	As of March 31, 2021				As of December 31, 2020
	Carrying		Fair		Carrying		Fair
	Value		Value		Value		Value

Long-term debt	$	1,164	$	1,312	$	1,164	$	1,358

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 Eastern Energy Gas has the ability to access at the measurement date.

The following table presents Eastern Energy Gas' 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		Total
As of March 31, 2021
Assets:

Foreign currency exchange rate derivatives	$	—	$	12	$	—	$	12
Money market mutual funds(1)	71		—		—		71
Investment funds	12		—		—		12
	$	83	$	12	$	—	$	95

Liabilities:

Foreign currency exchange rate derivatives	$	—	$	(1)	$	—	$	(1)
Interest rate derivatives	—		(3)		—		(3)
	$	—	$	(4)	$	—	$	(4)

As of December 31, 2020
Assets:

Foreign currency exchange rate derivatives	$	—	$	20	$	—	$	20

	$	—	$	20	$	—	$	20

Liabilities:
Commodity derivatives	$	—	$	(1)	$	—	$	(1)
Foreign currency exchange rate derivatives	—		(2)		—		(2)
Interest rate derivatives	—		(6)		—		(6)
	$	—	$	(9)	$	—	$	(9)

(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 purchase or normal sales and qualify for the exception afforded by GAAP. When available, the fair value of derivative contracts is estimated using unadjusted quoted prices for identical contracts in the market in which Eastern Energy Gas transacts. When quoted prices for identical contracts are not available, Eastern Energy Gas uses forward price curves. Forward price curves represent Eastern Energy Gas' estimates of the prices at which a buyer or seller could contract today for delivery or settlement at future dates. Eastern Energy Gas bases its forward price curves upon market price quotations, when available, or internally developed and commercial models, with internal and external fundamental data inputs. Market price quotations are obtained from independent brokers, exchanges, direct communication with market participants and actual transactions executed by Eastern Energy Gas. Market price quotations are generally readily obtainable for the applicable term of Eastern Energy Gas' outstanding derivative contracts; therefore, Eastern Energy Gas' forward price curves reflect observable market quotes. Market price quotations for certain natural gas trading hubs are not as readily obtainable due to the length of the contracts. Given that limited market data exists for these contracts, as well as for those contracts that are not actively traded, Eastern Energy Gas uses forward price curves derived from internal models based on perceived pricing relationships to major trading hubs that are based on unobservable inputs. The estimated fair value of these derivative contracts is a function of underlying forward commodity prices, interest rates, currency rates, related volatility, counterparty creditworthiness and duration of contracts.


	As of March 31, 2021				As of December 31, 2020
	Carrying		Fair		Carrying		Fair
	Value		Value		Value		Value

Long-term debt	$	4,414	$	4,744	$	4,425	$	5,012

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.

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Commitments and Contingencies	3 Months Ended
Commitments and Contingencies	Mar. 31, 2021
Loss Contingencies [Line Items]
Commitments and Contingencies	Commitments and Contingencies 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. California and Oregon 2020 Wildfires In September 2020, a severe weather event resulting in high winds, low humidity and warm temperatures contributed to several major wildfires, private and public property damage, personal injuries and loss of life and widespread power outages in Oregon and Northern California. The wildfires spread across certain parts of PacifiCorp's service territory and surrounding areas across multiple counties in Oregon and California, including Siskiyou County, California; Jackson County, Oregon; Douglas County, Oregon; Marion County, Oregon; Lincoln County, Oregon; and Klamath County, Oregon burning over 500,000 acres in aggregate. Third party reports for these wildfires indicate over 2,000 structures, including residences, destroyed; several structures damaged; multiple individuals injured; and several fatalities. Fire suppression costs estimated by various agencies total approximately $150 million. Investigations into the cause and origin of each wildfire are complex and ongoing and being conducted by various entities, including the United States Forest Service, the California Public Utilities Commission, the Oregon Department of Forestry, the Oregon Department of Justice, PacifiCorp and various experts engaged by PacifiCorp. Several lawsuits have been filed in Oregon and California, including a putative class action complaint in Oregon, on behalf of citizens and businesses who suffered damages from fires allegedly caused by PacifiCorp. The final determinations of liability, however, will only be made following comprehensive investigations and litigation processes. In California, under inverse condemnation, courts have held that investor-owned utilities can be liable for real and personal property damages without the utility being found negligent and regardless of fault. California law also permits inverse condemnation plaintiffs to recover reasonable attorney fees and costs. In both Oregon and California, PacifiCorp has equipment in areas accessed through special use permits, easements or similar agreements that may contain provisions requiring it to pay for damages caused by its equipment regardless of fault. Even if inverse condemnation or other provisions do not apply, PacifiCorp could nevertheless be found liable for all damages proximately caused by negligence, including property and natural resource damage; fire suppression costs; personal injury and loss of life damages; and interest. As of March 31, 2021, PacifiCorp has accrued $136 million as its best estimate of the potential losses net of expected insurance recoveries associated with the 2020 Wildfires that are considered probable of being incurred. These accruals include estimated losses for fire suppression costs, property damage, personal injury damages and loss of life damages. It is reasonably possible that PacifiCorp will incur additional losses beyond the amounts accrued; however, PacifiCorp is currently unable to estimate the range of possible additional losses that could be incurred due to the number of properties and parties involved and the lack of specific claims for all potential claimants. To the extent losses beyond the amounts accrued are incurred, additional insurance coverage is expected to be available to cover at least a portion of the losses. Environmental Laws and Regulations The Company is subject to federal, state, local and foreign laws and regulations regarding climate change, renewable portfolio standards, air and water quality, emissions performance standards, coal combustion byproduct disposal, hazardous and solid waste disposal, protected species and other environmental matters that have the potential to impact the Company's current and future operations. The Company believes it is in material compliance with all applicable laws and regulations. Hydroelectric Relicensing PacifiCorp is a party to the 2016 amended Klamath Hydroelectric Settlement Agreement ("KHSA"), which is intended to resolve disputes surrounding PacifiCorp's efforts to relicense the Klamath Hydroelectric Project. The KHSA establishes a process for PacifiCorp, the states of Oregon and California ("States") and other stakeholders to assess whether dam removal can occur consistent with the settlement's terms. For PacifiCorp, the key elements of the settlement include: (1) a contribution from PacifiCorp's Oregon and California customers capped at $200 million plus $250 million in California bond funds; (2) complete indemnification from harms associated with dam removal; (3) transfer of the FERC license to a third-party dam removal entity, the Klamath River Renewal Corporation ("KRRC"), who would conduct dam removal; and (4) ability for PacifiCorp to operate the facilities for the benefit of customers until dam removal commences. In September 2016, the KRRC and PacifiCorp filed a joint application with the FERC to transfer the license for the four mainstem Klamath dams from PacifiCorp to the KRRC. The FERC approved partial transfer of the Klamath license in a July 2020 order, subject to the condition that PacifiCorp remains co-licensee. Under the amended KHSA, PacifiCorp did not agree to remain co-licensee during the surrender and removal process given concerns about liability protections for PacifiCorp and its customers. In November 2020, PacifiCorp entered a memorandum of agreement (the "MOA") with the KRRC, the Karuk Tribe, the Yurok Tribe and the States to continue implementation of the KHSA. The agreement required the States, PacifiCorp and KRRC to file a new license transfer application by January 16, 2021 to remove PacifiCorp from the license for the Klamath Hydroelectric Project and add the States and KRRC as co-licensees for the purposes of surrender. On January 13, 2021, the new license transfer application was filed with the FERC, notifying it that PacifiCorp and the KRRC are not accepting co-licensee status under FERC's July 2020 order, and instead are seeking the license transfer outcome described in the new license transfer application. In addition, the MOA provides for additional contingency funding of $45 million, equally split between PacifiCorp and the States, and for PacifiCorp and the States to equally share in any additional cost overruns in the unlikely event that dam removal costs exceed the $450 million in funding to ensure dam removal is complete. The MOA also requires PacifiCorp to cover the costs associated with certain pre-existing environmental conditions. 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 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. PacifiCorp 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. California and Oregon 2020 Wildfires In September 2020, a severe weather event resulting in high winds, low humidity and warm temperatures contributed to several major wildfires, private and public property damage, personal injuries and loss of life and widespread power outages in Oregon and Northern California. The wildfires spread across certain parts of PacifiCorp's service territory and surrounding areas across multiple counties in Oregon and California, including Siskiyou County, California; Jackson County, Oregon; Douglas County, Oregon; Marion County, Oregon; Lincoln County, Oregon; and Klamath County, Oregon burning over 500,000 acres in aggregate. Third party reports for these wildfires indicate over 2,000 structures, including residences, destroyed; several structures damaged; multiple individuals injured; and several fatalities. Fire suppression costs estimated by various agencies total approximately $150 million. Investigations into the cause and origin of each wildfire are complex and ongoing and being conducted by various entities, including the United States Forest Service, the California Public Utilities Commission, the Oregon Department of Forestry, the Oregon Department of Justice, PacifiCorp and various experts engaged by PacifiCorp. Several lawsuits have been filed in Oregon and California, including a putative class action complaint in Oregon, on behalf of citizens and businesses who suffered damages from fires allegedly caused by PacifiCorp. The final determinations of liability, however, will only be made following comprehensive investigations and litigation processes. In California, under inverse condemnation, courts have held that investor-owned utilities can be liable for real and personal property damages without the utility being found negligent and regardless of fault. California law also permits inverse condemnation plaintiffs to recover reasonable attorney fees and costs. In both Oregon and California, PacifiCorp has equipment in areas accessed through special use permits, easements or similar agreements that may contain provisions requiring it to pay for damages caused by its equipment regardless of fault. Even if inverse condemnation or other provisions do not apply, PacifiCorp could nevertheless be found liable for all damages proximately caused by negligence, including property and natural resource damage; fire suppression costs; personal injury and loss of life damages; and interest. As of March 31, 2021, PacifiCorp has accrued $136 million as its best estimate of the potential losses net of expected insurance recoveries associated with the 2020 Wildfires that are considered probable of being incurred. These accruals include estimated losses for fire suppression costs, property damage, personal injury damages and loss of life damages. It is reasonably possible that PacifiCorp will incur additional losses beyond the amounts accrued; however, PacifiCorp is currently unable to estimate the range of possible additional losses that could be incurred due to the number of properties and parties involved and the lack of specific claims for all potential claimants. To the extent losses beyond the amounts accrued are incurred, additional insurance coverage is expected to be available to cover at least a portion of the losses. Environmental Laws and Regulations PacifiCorp is subject to federal, state and local laws and regulations regarding air and water quality, renewable portfolio standards, emissions performance standards, climate change, coal combustion byproduct disposal, hazardous and solid waste disposal, protected species and other environmental matters that have the potential to impact PacifiCorp's current and future operations. PacifiCorp believes it is in material compliance with all applicable laws and regulations. Hydroelectric Relicensing PacifiCorp is a party to the 2016 amended Klamath Hydroelectric Settlement Agreement ("KHSA"), which is intended to resolve disputes surrounding PacifiCorp's efforts to relicense the Klamath Hydroelectric Project. The KHSA establishes a process for PacifiCorp, the states of Oregon and California ("States") and other stakeholders to assess whether dam removal can occur consistent with the settlement's terms. For PacifiCorp, the key elements of the settlement include: (1) a contribution from PacifiCorp's Oregon and California customers capped at $200 million plus $250 million in California bond funds; (2) complete indemnification from harms associated with dam removal; (3) transfer of the Federal Energy Regulatory Commission ("FERC") license to a third-party dam removal entity, the Klamath River Renewal Corporation ("KRRC"), who would conduct dam removal; and (4) ability for PacifiCorp to operate the facilities for the benefit of customers until dam removal commences. In September 2016, the KRRC and PacifiCorp filed a joint application with the FERC to transfer the license for the four mainstem Klamath dams from PacifiCorp to the KRRC. The FERC approved partial transfer of the Klamath license in a July 2020 order, subject to the condition that PacifiCorp remains co-licensee. Under the amended KHSA, PacifiCorp did not agree to remain co-licensee during the surrender and removal process given concerns about liability protections for PacifiCorp and its customers. In November 2020, PacifiCorp entered a memorandum of agreement (the "MOA") with the KRRC, the Karuk Tribe, the Yurok Tribe and the States to continue implementation of the KHSA. The agreement required the States, PacifiCorp and KRRC to file a new license transfer application by January 16, 2021 to remove PacifiCorp from the license for the Klamath Hydroelectric Project and add the States and KRRC as co-licensees for the purposes of surrender. On January 13, 2021, the new license transfer application was filed with the FERC, notifying it that PacifiCorp and the KRRC are not accepting co-licensee status under FERC's July 2020 order, and instead are seeking the license transfer outcome described in the new license transfer application. In addition, the MOA provides for additional contingency funding of $45 million, equally split between PacifiCorp and the States, and for PacifiCorp and the States to equally share in any additional cost overruns in the unlikely event that dam removal costs exceed the $450 million in funding to ensure dam removal is complete. The MOA also requires PacifiCorp to cover the costs associated with certain pre-existing environmental conditions. 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 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 Federal Energy Regulatory Commission ("FERC")-approved formula rates subject to true-up for actual cost of service. MidAmerican Energy is authorized by the FERC to include a 0.50% adder beyond the approved base return on equity ("ROE") effective January 2015. Prior to September 2016, the rates in effect were based on a 12.38% ROE. In November 2013 and February 2015, a coalition of intervenors filed successive complaints with the FERC requesting that the 12.38% ROE no longer be found just and reasonable and sought to reduce the base ROE to 9.15% and 8.67%, respectively. In September 2016, the FERC issued an order for the first complaint, which reduces the base ROE to 10.32% and required refunds, plus interest, for the period from November 2013 through February 2015. Customer refunds relative to the first complaint occurred in February 2017. In November 2019, the FERC issued an order addressing the second complaint and issues on appeal in the first complaint. The order established a ROE of 9.88% (10.38% including the 0.50% adder) for the 15-month refund period of the first complaint and prospectively from September 2016 forward. In May 2020, the FERC issued an order on rehearing of the November 2019 order. The May 2020 order affirmed the FERC's prior decision to dismiss the second complaint and established an ROE of 10.02% (10.52% including the 0.50% adder) for the 15-month refund period of the first complaint and prospectively from September 2016 to the date of the May 2020 order. These orders continue to be subject to judicial appeal. MidAmerican Energy cannot predict the ultimate outcome of these matters and, as of March 31, 2021, has accrued a $10 million liability for refunds of amounts collected under the higher ROE during the periods covered by both complaints.
MidAmerican Funding, LLC and Subsidiaries [Member]
Loss Contingencies [Line Items]
Commitments and Contingencies	Commitments and ContingenciesMidAmerican 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 8 of MidAmerican Energy's Notes to Financial Statements.
Nevada Power Company [Member]
Loss Contingencies [Line Items]
Commitments and Contingencies	Commitments and Contingencies 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. 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.
Sierra Pacific Power Company [Member]
Loss Contingencies [Line Items]
Commitments and Contingencies	Commitments and Contingencies 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 consolidated financial results. 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.
Eastern Energy Gas Holdings, LLC [Member]
Loss Contingencies [Line Items]
Commitments and Contingencies	Commitments and Contingencies Legal Matters Eastern Energy Gas is party to a variety of legal actions arising out of the normal course of business. Plaintiffs occasionally seek punitive or exemplary damages. Eastern Energy Gas does not believe that such normal and routine litigation will have a material impact on its consolidated financial results. Environmental Laws and Regulations Eastern Energy Gas is subject to federal, state and local laws and regulations regarding climate change, air and water quality, hazardous and solid waste disposal, protected species and other environmental matters that have the potential to impact its current and future operations. Eastern Energy Gas believes it is in material compliance with all applicable laws and regulations.

XML 88 R47.htm IDEA: XBRL DOCUMENT

Revenue from Contracts with Customers

3 Months Ended

Mar. 31, 2021

Energy Products and Services


	For the Three-Month Period Ended March 31, 2021
	PacifiCorp		MidAmerican Funding		NV Energy		Northern Powergrid		BHE Pipeline Group		BHE Transmission		BHE Renewables		BHE and Other(1)		Total
Customer Revenue:
Regulated:
Retail electric	$	1,145	$	452	$	511	$	—	$	—	$	—	$	—	$	—	$	2,108
Retail gas	—		460		38		—		—		—		—		—		498
Wholesale	36		125		15		—		17		—		—		—		193
Transmission and distribution	25		15		21		263		—		172		—		—		496
Interstate pipeline	—		—		—		—		815		—		—		(41)		774
Other	23		—		—		—		2		—		—		—		25
Total Regulated	1,229		1,052		585		263		834		172		—		(41)		4,094
Nonregulated	—		10		—		10		237		8		166		187		618
Total Customer Revenue	1,229		1,062		585		273		1,071		180		166		146		4,712
Other revenue	13		5		6		27		22		—		24		40		137
Total	$	1,242	$	1,067	$	591	$	300	$	1,093	$	180	$	190	$	186	$	4,849


	For the Three-Month Period Ended March 31, 2020
	PacifiCorp		MidAmerican Funding		NV Energy		Northern Powergrid		BHE Pipeline Group		BHE Transmission		BHE Renewables		BHE and Other(1)		Total
Customer Revenue:
Regulated:
Retail electric	$	1,122	$	410	$	529	$	—	$	—	$	—	$	—	$	—	$	2,061
Retail gas	—		187		47		—		—		—		—		—		234
Wholesale	—		64		14		—		—		—		—		(1)		77
Transmission and distribution	22		15		23		233		—		169		—		—		462
Interstate pipeline	—		—		—		—		400		—		—		(48)		352
Other	26		—		1		—		—		—		—		—		27
Total Regulated	1,170		676		614		233		400		169		—		(49)		3,213
Nonregulated	—		6		1		7		—		3		159		127		303
Total Customer Revenue	1,170		682		615		240		400		172		159		78		3,516
Other revenue	36		4		7		26		1		—		19		25		118
Total	$	1,206	$	686	$	622	$	266	$	401	$	172	$	178	$	103	$	3,634

(1)The BHE and Other reportable segment represents amounts related principally to other entities, corporate functions and intersegment eliminations.

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
	Ended March 31,
		2021		2020
Customer Revenue:
Brokerage		$	1,022	$	777
Franchise		18		16
Total Customer Revenue		1,040		793
Mortgage and other revenue		192		100
Total		$	1,232	$	893

Remaining Performance Obligations


	Performance obligations expected to be satisfied:
	Less than 12 months		More than 12 months		Total
BHE Pipeline Group	$	2,521	$	20,918	$	23,439
BHE Transmission	513		—		513
Total	$	3,034	$	20,918	$	23,952

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




	Three-Month Periods
	Ended March 31,
		2021		2020
Customer Revenue:
Retail:
Residential		$	483	$	460
Commercial		359		358
Industrial		271		277
Other retail		32		27
Total retail		1,145		1,122
Wholesale (1)		36		—
Transmission		25		22
Other Customer Revenue		23		26
Total Customer Revenue		1,229		1,170
Other revenue		13		36
Total operating revenue		$	1,242	$	1,206

(1)Includes net payments to counterparties for the financial settlement of certain non-derivative forward contracts for energy sales.


	For the Three-Month Period Ended March 31, 2021
		Electric		Natural Gas		Other		Total
Customer Revenue:
Retail:
Residential		$	161	$	308	$	—	$	469
Commercial		71		129		—		200
Industrial		190		12		—		202
Natural gas transportation services		—		10		—		10
Other retail(1)		30		1		—		31
Total retail		452		460		—		912
Wholesale		74		51		—		125
Multi-value transmission projects		15		—		—		15
Other Customer Revenue		—		—		10		10
Total Customer Revenue		541		511		10		1,062
Other revenue		4		1		—		5
Total operating revenue		$	545	$	512	$	10	$	1,067


	For the Three-Month Period Ended March 31, 2020
		Electric		Natural Gas		Other		Total
Customer Revenue:
Retail:
Residential		$	148	$	128	$	—	$	276
Commercial		70		43		—		113
Industrial		163		4		—		167
Natural gas transportation services		—		11		—		11
Other retail(1)		29		—		—		29
Total retail		410		186		—		596
Wholesale		42		22		—		64
Multi-value transmission projects		16		—		—		16
Other Customer Revenue		—		—		1		1
Total Customer Revenue		468		208		1		677
Other revenue		3		1		—		4
Total operating revenue		$	471	$	209	$	1	$	681

(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.

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


	Three-Month Periods
	Ended March 31,
	2021		2020
Customer Revenue:
Retail:
Residential	$	196	$	193
Commercial	84		94
Industrial	63		70
Other	3		3
Total fully bundled	346		360
Distribution only service	5		7
Total retail	351		367
Wholesale, transmission and other	14		16
Total Customer Revenue	365		383
Other revenue	5		6
Total revenue	$	370	$	389


	Three-Month Periods
	Ended March 31,
	2021						2020
	Electric		Natural Gas		Total		Electric		Natural Gas		Total
Customer Revenue:
Retail:
Residential	$	71	$	25	$	96	$	69	$	30	$	99
Commercial	54		10		64		57		13		70
Industrial	39		3		42		41		4		45
Other	1		—		1		1		—		1
Total fully bundled	165		38		203		168		47		215
Distribution only service	1		—		1		1		—		1
Total retail	166		38		204		169		47		216
Wholesale, transmission and other	15		—		15		14		—		14
Total Customer Revenue	181		38		219		183		47		230
Other revenue	—		1		1		1		1		2
Total revenue	$	181	$	39	$	220	$	184	$	48	$	232

The following table summarizes Eastern Energy Gas' energy products and services revenue by regulated and nonregulated (in millions):


	Three-Month Periods
	Ended March 31,
	2021		2020
Customer Revenue:
Regulated:
Gas transportation and storage	$	279	$	344
Wholesale	17		2
Other	—		1
Total regulated	296		347




Nonregulated	190		208
Total Customer Revenue	486		555
Other revenue	—		1
Total operating revenue	$	486	$	556

Remaining Performance Obligations


	Performance obligations expected to be satisfied
	Less than 12 months		More than 12 months		Total
Eastern Energy Gas	$	1,564	$	16,115	$	17,679

The entire disclosure of revenue from contract with customer to transfer good or service and to transfer nonfinancial asset. Includes, but is not limited to, disaggregation of revenue, credit loss recognized from contract with customer, judgment and change in judgment related to contract with customer, and asset recognized from cost incurred to obtain or fulfill contract with customer. Excludes insurance and lease contracts.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-URI http://asc.fasb.org/topic&trid=49130388

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
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-Section 50
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
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Reference 5: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
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Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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-Paragraph 12
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Reference 8: http://www.xbrl.org/2003/role/disclosureRef
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Reference 9: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
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-Section 50
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-URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130558-203045

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 12
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130554-203045

Accumulated Other Comprehensive Income (Loss) [Line Items]

XML 89 R48.htm IDEA: XBRL DOCUMENT

BHE Shareholders' Equity (Notes)	3 Months Ended
BHE Shareholders' Equity (Notes)	Mar. 31, 2021
Equity [Abstract]
Stockholders' Equity Note Disclosure [Text Block]	BHE Shareholders' Equity For the three-month period ended March 31, 2020, BHE repurchased 180,358 shares of its common stock for $126 million.

XML 90 R49.htm IDEA: XBRL DOCUMENT

Components of Accumulated Other Comprehensive Loss, Net

3 Months Ended

Mar. 31, 2021

Components of Accumulated Other Comprehensive Income (Loss), Net

Components of Other Comprehensive Income (Loss), Net


	Unrecognized		Foreign		Unrealized		AOCI
	Amounts on		Currency		(Losses) Gains		Attributable
	Retirement		Translation		on Cash		To BHE
	Benefits		Adjustment		Flow Hedges		Shareholders, Net

Balance, December 31, 2019	$	(417)	$	(1,296)	$	7	$	(1,706)

Other comprehensive income (loss)	34		(548)		(33)		(547)
Balance, March 31, 2020	$	(383)	$	(1,844)	$	(26)	$	(2,253)

Balance, December 31, 2020	$	(482)	$	(1,062)	$	(8)	$	(1,552)
Other comprehensive income	7		91		14		112
Balance, March 31, 2021	$	(475)	$	(971)	$	6	$	(1,440)

Accumulated Other Comprehensive Income (Loss) [Line Items]

Components of Accumulated Other Comprehensive Income (Loss), Net

Components of Accumulated Other Comprehensive Loss, Net

The following table shows the change in accumulated other comprehensive loss by each component of other comprehensive income (loss), net of applicable income tax (in millions):


	Unrecognized						Accumulated
	Amounts On		Unrealized				Other
	Retirement		Losses on Cash		Noncontrolling		Comprehensive
	Benefits		Flow Hedges		Interests		Loss, Net
Balance, December 31, 2019	$	(106)	$	(81)	$	—	$	(187)
Other comprehensive income (loss)	1		(85)		—		(84)
Balance, March 31, 2020	$	(105)	$	(166)	$	—	$	(271)

Balance, December 31, 2020	$	(12)	$	(51)	$	10	$	(53)
Other comprehensive income (loss)	2		10		(4)		8
Balance, March 31, 2021	$	(10)	$	(41)	$	6	$	(45)

XML 91 R50.htm IDEA: XBRL DOCUMENT

Segment Information

3 Months Ended

Mar. 31, 2021

Segment Information


	Three-Month Periods
	Ended March 31,
		2021		2020
Operating revenue:
PacifiCorp		$	1,242	$	1,206
MidAmerican Funding		1,067		686
NV Energy		591		622
Northern Powergrid		300		266
BHE Pipeline Group		1,093		401
BHE Transmission		180		172
BHE Renewables		190		178
HomeServices		1,232		893
BHE and Other(1)		186		103
Total operating revenue		$	6,081	$	4,527





Depreciation and amortization:
PacifiCorp	$	264	$	252
MidAmerican Funding	207		176
NV Energy	136		124
Northern Powergrid	71		63
BHE Pipeline Group	118		64
BHE Transmission	58		60
BHE Renewables	60		71
HomeServices	11		11
BHE and Other(1)	2		—
Total depreciation and amortization	$	927	$	821


	Three-Month Periods
	Ended March 31,
		2021		2020
Operating income:
PacifiCorp		$	234	$	234
MidAmerican Funding		48		102
NV Energy		70		79
Northern Powergrid		151		132
BHE Pipeline Group		618		249
BHE Transmission		81		76
BHE Renewables		33		17
HomeServices		112		20
BHE and Other(1)		(14)		10
Total operating income		1,333		919
Interest expense		(530)		(483)
Capitalized interest		14		17
Allowance for equity funds		26		34
Interest and dividend income		21		20
(Losses) gains on marketable securities, net		(1,118)		27
Other, net		8		(27)
Total (loss) income before income tax benefit and equity loss		$	(246)	$	507





Interest expense:
PacifiCorp	$	107	$	102
MidAmerican Funding	78		81
NV Energy	52		58
Northern Powergrid	33		32
BHE Pipeline Group	38		14
BHE Transmission	38		38
BHE Renewables	40		42
HomeServices	1		5
BHE and Other(1)	143		111
Total interest expense	$	530	$	483


(Loss) earnings on common shares:
PacifiCorp	$	169	$	176
MidAmerican Funding	144		150
NV Energy	34		20
Northern Powergrid	104		87
BHE Pipeline Group	383		179
BHE Transmission	59		55
BHE Renewables	16		95
HomeServices	84		10
BHE and Other	(1,027)		(102)
(Loss) earnings on common shares	$	(34)	$	670


	As of
	March 31,		December 31,
	2021		2020
Assets:
PacifiCorp	$	26,956	$	26,862
MidAmerican Funding	24,098		23,530
NV Energy	14,594		14,501
Northern Powergrid	8,980		8,782
BHE Pipeline Group	19,651		19,541
BHE Transmission	9,341		9,208
BHE Renewables	11,935		12,004
HomeServices	5,186		4,955
BHE and Other(1)	6,781		7,933
Total assets	$	127,522	$	127,316


	Three-Month Periods
	Ended March 31,
		2021		2020
Operating revenue by country:
United States		$	5,597	$	4,089
United Kingdom		300		266
Canada		177		171
Philippines and other		7		1
Total operating revenue by country		$	6,081	$	4,527


(Loss) income before income tax benefit and equity loss by country:
United States	$	(423)	$	354
United Kingdom	132		109
Canada	39		40
Philippines and other	6		4
Total (loss) income before income tax benefit and equity loss by country	$	(246)	$	507

The following table shows the change in the carrying amount of goodwill by reportable segment for the three-month period ended March 31, 2021 (in millions):


									BHE Pipeline Group
	PacifiCorp		MidAmerican Funding		NV Energy		Northern Powergrid				BHE Transmission		BHE Renewables		HomeServices
																	Total

December 31, 2020	$	1,129	$	2,102	$	2,369	$	1,000	$	1,803	$	1,551	$	95	$	1,457	$	11,506
Acquisitions	—		—		—		—		—		—		—		1		1
Foreign currency translation	—		—		—		6		—		21		—		—		27

March 31, 2021	$	1,129	$	2,102	$	2,369	$	1,006	$	1,803	$	1,572	$	95	$	1,458	$	11,534

Segment Information

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


	Three-Month Periods
	Ended March 31,
		2021		2020
Operating revenue:
Regulated electric		$	545	$	471
Regulated natural gas		512		209
Other		10		1
Total operating revenue		$	1,067	$	681

Operating income:
Regulated electric		$	9	$	59
Regulated natural gas		39		39

Total operating income		48		98
Interest expense		(74)		(76)
Allowance for borrowed funds		2		3
Allowance for equity funds		6		8
Other, net		11		(5)
(Loss) income before income tax benefit		$	(7)	$	28


	As of
	March 31, 2021		December 31, 2020
Assets:
Regulated electric	$	20,272	$	19,892
Regulated natural gas	1,725		1,544
Other	3		1
Total assets	$	22,000	$	21,437

Segment Information

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


	Three-Month Periods
	Ended March 31,
		2021		2020
Operating revenue:
Regulated electric		$	545	$	471
Regulated natural gas		512		209
Other		10		6
Total operating revenue		$	1,067	$	686

Operating income:
Regulated electric		$	9	$	59
Regulated natural gas		39		39
Other		—		4
Total operating income		48		102
Interest expense		(78)		(81)
Allowance for borrowed funds		2		3
Allowance for equity funds		6		8
Other, net		10		(6)
(Loss) income before income tax benefit		$	(12)	$	26


	As of
	March 31, 2021		December 31, 2020
Assets(1):
Regulated electric	$	21,463	$	21,083
Regulated natural gas	1,804		1,623
Other	7		5
Total assets	$	23,274	$	22,711


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

Segment Information

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


	Three-Month Periods
	Ended March 31,
	2021		2020
Operating revenue:
Regulated electric	$	181	$	184
Regulated natural gas	39		48
Total operating revenue	$	220	$	232





















Operating income:
Regulated electric	$	31	$	33
Regulated natural gas	8		7
Total operating income	39		40
Interest expense	(14)		(14)

Allowance for equity funds	1		1
Other, net	6		1
Income before income tax expense	$	32	$	28










	As of
		March 31,		December 31,
		2021		2020
Assets:
Regulated electric		$	3,589	$	3,540
Regulated natural gas		348		342
Other(1)		26		37
Total assets		$	3,963	$	3,919

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

The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.

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XML 92 R51.htm IDEA: XBRL DOCUMENT

Variable Interest Entities	3 Months Ended
Variable Interest Entities	Mar. 31, 2021
Eastern Energy Gas Holdings, LLC [Member]
Schedule of Equity Method Investments [Line Items]
Variable Interest Entities	Variable Interest Entities The primary beneficiary of a variable interest entity ("VIE") is required to consolidate the VIE and to disclose certain information about its significant variable interests in the VIE. The primary beneficiary of a VIE is the entity that has both 1) the power to direct the activities that most significantly impact the entity's economic performance and 2) the obligation to absorb losses or receive benefits from the entity that could potentially be significant to the VIE. In November 2019, DEI contributed to Eastern Energy Gas a 75% controlling limited partner interest in Cove Point. In December 2019, DEI sold its retained 25% noncontrolling limited partner interest in Cove Point. As part of the GT&S Transaction, Eastern Energy Gas finalized a restructuring which included the disposition of a 50% noncontrolling interest in Cove Point to DEI, which resulted in Eastern Energy Gas owning 100% of the general partner interest and 25% of the limited partnership interest in Cove Point. Eastern Energy Gas concluded that Cove Point is a VIE due to the limited partners lacking the characteristics of a controlling financial interest. Eastern Energy Gas is the primary beneficiary of Cove Point as it has the power to direct the activities that most significantly impact its economic performance as well as the obligation to absorb losses and benefits which could be significant to it. Eastern Energy Gas purchased shared services from Carolina Gas Services, Inc. ("Carolina Gas Services") an affiliated VIE, of $3 million and $4 million for the three-month periods ended March 31, 2021 and 2020, respectively. Eastern Energy Gas' Consolidated Balance Sheets included amounts due to Carolina Gas Services of $26 million and $22 million as of March 31, 2021 and December 31, 2020, respectively. Eastern Energy Gas determined that neither it nor any of its consolidated entities is the primary beneficiary of Carolina Gas Services as neither it nor any of its consolidated entities has both the power to direct the activities that most significantly impact its economic performance as well as the obligation to absorb losses and benefits which could be significant to them. Carolina Gas Services provides marketing and operational services. Neither Eastern Energy Gas nor any of its consolidated entities has any obligation to absorb more than its allocated share of Carolina Gas Services costs. Prior to the GT&S Transaction, Eastern Energy Gas purchased shared services from Dominion Energy Questar Pipeline Services, Inc. ("DEQPS"), an affiliated VIE, of $7 million for the three-month period ended March 31, 2020. Eastern Energy Gas determined that neither it nor any of its consolidated entities was the primary beneficiary of DEQPS, as neither it nor any of its consolidated entities has both the power to direct the activities that most significantly impact their economic performance as well as the obligation to absorb losses and benefits which could be significant to them. DEQPS provided marketing and operational services. Neither Eastern Energy Gas nor any of its consolidated entities had any obligation to absorb more than its allocated share of DEQPS costs. Prior to the GT&S Transaction, Eastern Energy Gas purchased shared services from Dominion Energy Services, Inc. ("DES"), an affiliated VIE, of $31 million for the three-month period ended March 31, 2020. Eastern Energy Gas determined that neither it nor any of its consolidated entities was the primary beneficiary of DES as neither it nor any of its consolidated entities had both the power to direct the activities that most significantly impact their economic performance as well as the obligation to absorb losses and benefits which could be significant to them. DES provided accounting, legal, finance and certain administrative and technical services. Neither Eastern Energy Gas nor any of its consolidated entities had any obligation to absorb more than its allocated share of DES costs.

XML 93 R52.htm IDEA: XBRL DOCUMENT

Related Party Transactions

3 Months Ended

Mar. 31, 2021

Schedule of Equity Method Investments [Line Items]

Related Party Transactions

Transactions Prior to the GT&S Transaction

Subsequent to the GT&S Transaction, and with the exception of Cove Point, Eastern Energy Gas' transactions with other DEI subsidiaries are no longer related-party transactions.


Sales of natural gas and transportation and storage services	$	64
Purchases of natural gas and transportation and storage services	3
Services provided by related parties(1)	43
Services provided to related parties(2)	32

(1) Includes capitalized expenditures of $3 million.

(2) Amount primarily attributable to Atlantic Coast Pipeline, LLC, a related-party VIE prior to the GT&S Transaction.

Interest income related to Eastern Energy Gas' affiliated notes receivable from DEI was $11 million for the three-month period ended March 31, 2020.

Interest income related to Eastern Energy Gas' affiliated notes receivable from East Ohio Gas Company was $18 million for the three-month period ended March 31, 2020.

For the three-month period ended March 31, 2020, Eastern Energy Gas distributed $37 million to DEI.

Transactions Subsequent to the GT&S Transaction

XML 94 R53.htm IDEA: XBRL DOCUMENT

Cash and Cash Equivalents and Restricted Cash and Cash Equivalents Supplemental Cash Flow Disclosure (Policies)	3 Months Ended
	Mar. 31, 2021
MidAmerican Funding, LLC and Subsidiaries [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 March 31, 2021 and December 31, 2020, consist substantially of funds restricted for wildlife preservation and, as of December 31, 2020, 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 March 31, 2021 and December 31, 2020, consist substantially of funds restricted for wildlife preservation and, as of December 31, 2020, the purpose of constructing solid waste facilities under tax-exempt bond obligation agreements.

XML 95 R54.htm IDEA: XBRL DOCUMENT

Business Combination Disclosure Business Combination Disclosure (Tables)

3 Months Ended

Mar. 31, 2021

Business Combinations [Abstract]

Schedule of Recognized Identified Assets Acquired and Liabilities Assumed

The following table summarizes the preliminary fair values of the assets acquired and liabilities assumed as of the acquisition date (in millions):


	Fair Value

Current assets, including cash and cash equivalents of $104	$	569
Property, plant and equipment	9,254
Goodwill	1,732
Regulatory assets	108
Deferred income taxes	275
Other long-term assets	1,424
Total assets	13,362

Current liabilities, including current portion of long-term debt of $1,200	1,567
Long-term debt, less current portion	4,415
Regulatory liabilities	661
Other long-term liabilities	289
Total liabilities	6,932
Noncontrolling interest	3,916
Net assets acquired	$	2,514

Business Acquisition, Pro Forma Information

Pro Forma Financial Information


	Three-Month Period
	Ended March 31, 2020

Operating revenue	$	5,056

Net income attributable to BHE shareholders	$	773

XML 96 R55.htm IDEA: XBRL DOCUMENT

Property, Plant and Equipment, Net (Tables)

3 Months Ended

Mar. 31, 2021

Property, Plant and Equipment

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


		As of
	Depreciable	March 31,		December 31,
	Life	2021		2020
Regulated assets:
Utility generation, transmission and distribution systems	5-80 years	$	87,898	$	86,730
Interstate natural gas pipeline assets	3-80 years	16,712		16,667
		104,610		103,397
Accumulated depreciation and amortization		(31,653)		(30,662)
Regulated assets, net		72,957		72,735

Nonregulated assets:
Independent power plants	5-30 years	7,034		7,012
Other assets	3-40 years	5,794		5,659
		12,828		12,671
Accumulated depreciation and amortization		(2,337)		(2,586)
Nonregulated assets, net		10,491		10,085

Net operating assets		83,448		82,820
Construction work-in-progress		3,309		3,308
Property, plant and equipment, net		$	86,757	$	86,128

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


		As of
		March 31,		December 31,
	Depreciable Life	2021		2020
Utility plant in service, net:
Generation	20-70 years	$	17,083	$	16,980
Transmission	52-75 years	2,372		2,365
Electric distribution	20-75 years	4,433		4,369
Natural gas distribution	29-75 years	1,970		1,955
Utility plant in service		25,858		25,669
Accumulated depreciation and amortization		(7,061)		(6,902)
Utility plant in service, net		18,797		18,767
Nonregulated property, net:
Nonregulated property gross	20-50 years	7		7
Accumulated depreciation and amortization		(1)		(1)
Nonregulated property, net		6		6
		18,803		18,773
Construction work-in-progress		420		506
Property, plant and equipment, net		$	19,223	$	19,279


		As of
		March 31,		December 31,
	Depreciable Life	2021		2020
Utility Plant:
Generation	15 - 59 years	$	13,355	$	12,861
Transmission	60 - 90 years	7,686		7,632
Distribution	20 - 75 years	7,725		7,660
Intangible plant(1)	5 - 75 years	1,069		1,054
Other	5 - 60 years	1,513		1,510
Utility plant in service		31,348		30,717
Accumulated depreciation and amortization		(9,980)		(9,838)
Utility plant in service, net		21,368		20,879
Other non-regulated, net of accumulated depreciation and amortization	14 - 95 years	9		9
Plant, net		21,377		20,888
Construction work-in-progress		1,158		1,542
Property, plant and equipment, net		$	22,535	$	22,430

(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	March 31,		December 31,
		2021		2020
Utility plant:
Generation	30 - 55 years	$	3,691	$	3,690
Transmission	45 - 70 years	1,465		1,468
Distribution	20 - 65 years	3,803		3,771
General and intangible plant	5 - 65 years	798		791
Utility plant		9,757		9,720
Accumulated depreciation and amortization		(3,224)		(3,162)
Utility plant, net		6,533		6,558
Other non-regulated, net of accumulated depreciation and amortization	45 years	1		1
Plant, net		6,534		6,559
Construction work-in-progress		217		142
Property, plant and equipment, net		$	6,751	$	6,701

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


		As of
	Depreciable Life	March 31,		December 31,
		2021		2020
Utility plant:
Electric generation	25 - 60 years	$	1,131	$	1,130
Electric transmission	50 - 100 years	917		908
Electric distribution	20 - 100 years	1,763		1,754
Electric general and intangible plant	5 - 70 years	193		189
Natural gas distribution	35 - 70 years	431		429
Natural gas general and intangible plant	5 - 70 years	15		15
Common general	5 - 70 years	357		355
Utility plant		4,807		4,780
Accumulated depreciation and amortization		(1,783)		(1,755)
Utility plant, net		3,024		3,025
Other non-regulated, net of accumulated depreciation and amortization	70 years	2		2
Plant, net		3,026		3,027
Construction work-in-progress		162		137
Property, plant and equipment, net		$	3,188	$	3,164

Property, Plant and Equipment

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


		As of
		March 31,		December 31,
	Depreciable Life	2021		2020
Utility Plant:

Interstate natural gas pipeline assets	24 - 43 years	$	8,385	$	8,382
Intangible plant	5 - 10 years	114		115
Utility plant in service		8,499		8,497
Accumulated depreciation and amortization		(2,792)		(2,759)
Utility plant in service, net		5,707		5,738

Nonutility Plant:

LNG facility	40 years	4,460		4,454
Intangible plant	14 years	25		25
Nonutility plant in service		4,485		4,479
Accumulated depreciation and amortization		(320)		(283)
Nonutility plant in service, net		4,165		4,196

Plant, net		9,872		9,934
Construction work- in-progress		227		210
Property, plant and equipment, net		$	10,099	$	10,144

XML 97 R56.htm IDEA: XBRL DOCUMENT

Investments and Restricted Cash and Cash Equivalents and Investments (Tables)

3 Months Ended

Mar. 31, 2021

Restricted Cash and Cash Equivalents Items [Line Items]

Investments and Restricted Cash and Investments

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


	As of
	March 31,		December 31,
	2021		2020
Investments:
BYD Company Limited common stock	$	4,773	$	5,897
Rabbi trusts	452		440
Other	288		263
Total investments	5,513		6,600

Equity method investments:
BHE Renewables tax equity investments	5,399		5,626
Iroquois Gas Transmission System, L.P.	586		580
Electric Transmission Texas, LLC	581		594
JAX LNG, LLC	80		75
Bridger Coal Company	68		74
Other	113		118
Total equity method investments	6,827		7,067

Restricted cash and cash equivalents and investments:
Quad Cities Station nuclear decommissioning trust funds	697		676
Other restricted cash and cash equivalents	130		155
Total restricted cash and cash equivalents and investments	827		831

Total investments and restricted cash and cash equivalents and investments	$	13,167	$	14,498

Reflected as:
Current assets	$	157	$	178
Noncurrent assets	13,010		14,320
Total investments and restricted cash and cash equivalents and investments	$	13,167	$	14,498

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

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


	Three-Month Periods
	Ended March 31,
		2021		2020
Unrealized (losses) gains recognized on marketable securities still held at the reporting date		$	(1,119)	$	25
Net gains recognized on marketable securities sold during the period		1		2
(Losses) gains on marketable securities, net		$	(1,118)	$	27

Cash and Cash Equivalents and Restricted Cash and Cash Equivalents


	As of
	March 31,		December 31,
	2021		2020
Cash and cash equivalents	$	1,276	$	1,290
Restricted cash and cash equivalents	117		140
Investments and restricted cash and cash equivalents and investments	13		15
Total cash and cash equivalents and restricted cash and cash equivalents	$	1,406	$	1,445

Restricted Cash and Cash Equivalents Items [Line Items]

Investments and Restricted Cash and Investments

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


	As of
	March 31,		December 31,
	2021		2020
Investments:
Investment funds	$	12	$	—


Equity method investments:
Iroquois	250		244



Total investments	262		244

Restricted cash and cash equivalents:
Customer deposits	9		13
Total restricted cash and cash equivalents	9		13

Total investments and restricted cash and cash equivalents	$	271	$	257

Reflected as:
Current assets	$	9	$	13
Noncurrent assets	262		244
Total investments and restricted cash and cash equivalents	$	271	$	257

Condensed Cash Flow Statements, Captions [Line Items]


	As of
	March 31,		December 31,
	2021		2020

Cash and cash equivalents	$	106	$	35
Restricted cash and cash equivalents	9		13
Total cash and cash equivalents and restricted cash and cash equivalents	$	115	$	48

XML 98 R57.htm IDEA: XBRL DOCUMENT

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

3 Months Ended

Mar. 31, 2021

Cash and Cash Equivalents and Restricted Cash and Cash Equivalents


	As of
	March 31,		December 31,
	2021		2020
Cash and cash equivalents	$	1,276	$	1,290
Restricted cash and cash equivalents	117		140
Investments and restricted cash and cash equivalents and investments	13		15
Total cash and cash equivalents and restricted cash and cash equivalents	$	1,406	$	1,445

Condensed Cash Flow Statements, Captions [Line Items]


	As of
	March 31,		December 31,
	2021		2020
Cash and cash equivalents	$	8	$	19
Restricted cash and cash equivalents included in other current assets	7		7
Total cash and cash equivalents and restricted cash and cash equivalents	$	15	$	26

Condensed Cash Flow Statements, Captions [Line Items]


	As of
	March 31,		December 31,
	2021		2020
Cash and cash equivalents	$	92	$	25
Restricted cash and cash equivalents included in other current assets	12		11
Total cash and cash equivalents and restricted cash and cash equivalents	$	104	$	36

Condensed Cash Flow Statements, Captions [Line Items]


	As of
	March 31,		December 31,
	2021		2020
Cash and cash equivalents	$	43	$	13
Restricted cash included in other current assets	3		4
Restricted cash included in other assets	3		2
Total cash and cash equivalents and restricted cash and cash equivalents	$	49	$	19

Condensed Cash Flow Statements, Captions [Line Items]


	As of
	March 31,		December 31,
	2021		2020

Cash and cash equivalents	$	38	$	39
Restricted cash and cash equivalents in other current assets	7		7
Total cash and cash equivalents and restricted cash and cash equivalents	$	45	$	46

Condensed Cash Flow Statements, Captions [Line Items]


	As of
	March 31,		December 31,
	2021		2020

Cash and cash equivalents	$	37	$	38
Restricted cash and cash equivalents in other current assets	7		7
Total cash and cash equivalents and restricted cash and cash equivalents	$	44	$	45

Condensed Cash Flow Statements, Captions [Line Items]

Schedule of Effective Income Tax Rate Reconciliation [Line Items]


	As of
	March 31,		December 31,
	2021		2020

Cash and cash equivalents	$	106	$	35
Restricted cash and cash equivalents	9		13
Total cash and cash equivalents and restricted cash and cash equivalents	$	115	$	48

XML 99 R58.htm IDEA: XBRL DOCUMENT

Income Taxes (Tables)

3 Months Ended

Mar. 31, 2021

Schedule of Effective Income Tax Rate Reconciliation

A reconciliation of the federal statutory income tax rate to the effective income tax rate applicable to income before income tax benefit is as follows:


	Three-Month Periods
	Ended March 31,
		2021		2020

Federal statutory income tax rate		21	%	21	%
Income tax credits		136		(46)
State income tax, net of federal income tax impacts		21		—
Income tax effect of foreign income		6		(3)
Effects of ratemaking		10		(8)
Equity income		15		(1)
Noncontrolling interest		9		—
Other, net		(1)		1
Effective income tax rate		217	%	(36)	%

Schedule of Effective Income Tax Rate Reconciliation [Line Items]

Schedule of Effective Income Tax Rate Reconciliation

A reconciliation of the federal statutory income tax rate to the effective income tax rate applicable to income before income tax expense is as follows:


	Three-Month Periods
	Ended March 31,
	2021		2020

Federal statutory income tax rate	21	%	21	%


Effects of ratemaking	(10)		(8)


Other	2		(2)
Effective income tax rate	13	%	11	%

Schedule of Effective Income Tax Rate Reconciliation [Line Items]

Schedule of Effective Income Tax Rate Reconciliation

A reconciliation of the federal statutory income tax rate to the effective income tax rate applicable to income before income tax expense is as follows:


	Three-Month Periods
	Ended March 31,
		2021		2020

Federal statutory income tax rate		21	%	21	%
State income tax, net of federal income tax benefit		3		3
Federal income tax credits		(20)		(11)
Effects of ratemaking		(13)		(22)

Other		2		—
Effective income tax rate		(7)	%	(9)	%

Schedule of Effective Income Tax Rate Reconciliation [Line Items]

Schedule of Effective Income Tax Rate Reconciliation

A reconciliation of the federal statutory income tax rate to MidAmerican Energy's effective income tax rate applicable to income before income tax benefit is as follows:


	Three-Month Periods
	Ended March 31,
		2021		2020

Federal statutory income tax rate		21	%	21	%
Income tax credits		2,400		(430)
State income tax, net of federal income tax impacts		(29)		(28)
Effects of ratemaking		(186)		(3)
Other, net		(6)		1
Effective income tax rate		2,200	%	(439)	%

Schedule of Effective Income Tax Rate Reconciliation [Line Items]

Schedule of Effective Income Tax Rate Reconciliation

A reconciliation of the federal statutory income tax rate to MidAmerican Funding's effective income tax rate applicable to income before income tax benefit is as follows:


	Three-Month Periods
	Ended March 31,
		2021		2020

Federal statutory income tax rate		21	%	21	%
Income tax credits		1,400		(463)
State income tax, net of federal income tax impacts		(8)		(31)
Effects of ratemaking		(108)		(3)
Other, net		(5)		(1)
Effective income tax rate		1,300	%	(477)	%

Schedule of Effective Income Tax Rate Reconciliation [Line Items]

Schedule of Effective Income Tax Rate Reconciliation

A reconciliation of the federal statutory income tax rate to the effective income tax rate applicable to income before income tax expense is as follows:


	Three-Month Periods
	Ended March 31,
	2021		2020

Federal statutory income tax rate	21	%	21	%
State income tax, net of federal income tax benefit	3		3



Equity interest	2		1
Effects of ratemaking	(1)		(1)





Absence of noncontrolling interest	(11)		(3)

Other, net	(1)		1
Effective income tax rate	13	%	22	%

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Employee Benefit Plans (Tables)

3 Months Ended

Mar. 31, 2021

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
	Ended March 31,
		2021		2020
Pension:
Service cost		$	7	$	3
Interest cost		20		23
Expected return on plan assets		(33)		(35)
Net amortization		6		9
Net periodic benefit cost		$	—	$	—

Other postretirement:
Service cost		$	2	$	1
Interest cost		5		6
Expected return on plan assets		(5)		(9)
Net amortization		(1)		(1)
Net periodic benefit cost (credit)		$	1	$	(3)

Foreign Operations

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


	Three-Month Periods
	Ended March 31,
		2021		2020

Service cost		$	4	$	4
Interest cost		8		10
Expected return on plan assets		(28)		(25)

Net amortization		14		10
Net periodic benefit credit		$	(2)	$	(1)

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
	Ended March 31,
		2021		2020
Pension:
Service cost		$	—	$	—
Interest cost		7		9
Expected return on plan assets		(13)		(14)
Net amortization		5		5
Net periodic benefit credit		$	(1)	$	—

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

Schedule of Defined Benefit Plans Disclosures

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


	Three-Month Periods
	Ended March 31,
		2021		2020
Pension:
Service cost		$	5	$	1
Interest cost		6		6
Expected return on plan assets		(9)		(10)

Net periodic benefit cost (credit)		$	2	$	(3)

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

Schedule of Amounts Recognized in Balance Sheet

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


	As of
	March 31,		December 31,
	2021		2020
Qualified Pension Plan:
Other non-current assets	$	9	$	8



Non-Qualified Pension Plans:

Other current liabilities	(1)		(1)
Other long-term liabilities	(9)		(9)

Other Postretirement Plans:
Other non-current assets	4		4

Schedule of Amounts Recognized in Balance Sheet

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


	As of
	March 31,		December 31,
	2021		2020
Qualified Pension Plan:

Other non-current assets	$	27	$	26



Non-Qualified Pension Plans:


Other current liabilities	(1)		(1)
Other long-term liabilities	(8)		(8)

Other Postretirement Plans:



Other long-term liabilities	(14)		(13)

Schedule of Net Benefit Costs (Credits)

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


	Three-Month Periods
	Ended March 31,
		2021		2020
Pension:
Service cost		$	—	$	1
Interest cost		—		3
Expected return on plan assets		—		(14)
Net amortization		—		2
Net periodic benefit cost (credit)		$	—	$	(8)

Other Postretirement:
Service cost		$	—	$	1
Interest cost		—		1
Expected return on plan assets		—		(5)
Net amortization		—		(1)
Net periodic benefit cost (credit)		$	—	$	(4)

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

3 Months Ended

Mar. 31, 2021

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 March 31, 2021
Not designated as hedging contracts(1):
Commodity assets	$	45	$	6	$	2	$	—	$	53
Commodity liabilities	(2)		—		(27)		(24)		(53)
Total	43		6		(25)		(24)		—

Total derivatives	43		6		(25)		(24)		—
Cash collateral receivable	—		—		13		4		17
Total derivatives - net basis	$	43	$	6	$	(12)	$	(20)	$	17

As of December 31, 2020
Not designated as hedging contracts(1):
Commodity assets	$	29	$	6	$	1	$	—	$	36
Commodity liabilities	(2)		—		(23)		(28)		(53)
Total	27		6		(22)		(28)		(17)

Total derivatives	27		6		(22)		(28)		(17)
Cash collateral receivable	—		—		15		9		24
Total derivatives - net basis	$	27	$	6	$	(7)	$	(19)	$	7

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


	Three-Month Periods
	Ended March 31,
		2021		2020

Beginning balance		$	17	$	62
Changes in fair value		(17)		34
Net gains reclassified to operating revenue		—		8
Net losses reclassified to cost of fuel and energy		—		(20)
Ending balance		$	—	$	84

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	March 31,	December 31,
	Measure	2021	2020

Electricity sales, net	Megawatt hours	—	(1)
Natural gas purchases	Decatherms	114	100

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Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2021

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 March 31, 2021
Assets:
Commodity derivatives	$	1	$	72	$	154	$	(18)	$	209
Foreign currency exchange rate derivatives	—		12		—		—		12
Interest rate derivatives	—		33		47		—		80
Mortgage loans held for sale	—		2,065		—		—		2,065
Money market mutual funds(2)	807		—		—		—		807
Debt securities:
United States government obligations	210		—		—		—		210
International government obligations	—		5		—		—		5
Corporate obligations	—		71		—		—		71
Municipal obligations	—		2		—		—		2
Agency, asset and mortgage-backed obligations	—		5		—		—		5
Equity securities:
United States companies	395		—		—		—		395
International companies	4,780		—		—		—		4,780
Investment funds	256		—		—		—		256
	$	6,449	$	2,265	$	201	$	(18)	$	8,897
Liabilities:
Commodity derivatives	$	—	$	(90)	$	(30)	$	39	$	(81)
Foreign currency exchange rate derivatives	—		(1)		—		—		(1)
Interest rate derivatives	(3)		(14)		(6)		—		(23)
	$	(3)	$	(105)	$	(36)	$	39	$	(105)


	Input Levels for Fair Value Measurements
	Level 1		Level 2		Level 3		Other(1)		Total
As of December 31, 2020
Assets:
Commodity derivatives	$	1	$	73	$	135	$	(21)	$	188
Foreign currency exchange rate derivatives	—		20		—		—		20
Interest rate derivatives	—		—		62		—		62
Mortgage loans held for sale	—		2,001		—		—		2,001
Money market mutual funds(2)	873		—		—		—		873
Debt securities:
United States government obligations	200		—		—		—		200
International government obligations	—		5		—		—		5
Corporate obligations	—		73		—		—		73
Municipal obligations	—		2		—		—		2
Agency, asset and mortgage-backed obligations	—		6		—		—		6
Equity securities:
United States companies	381		—		—		—		381
International companies	5,906		—		—		—		5,906
Investment funds	201		—		—		—		201
	$	7,562	$	2,180	$	197	$	(21)	$	9,918
Liabilities:
Commodity derivatives	$	(1)	$	(90)	$	(19)	$	56	$	(54)
Foreign currency exchange rate derivatives	—		(2)		—		—		(2)
Interest rate derivatives	(5)		(60)		—		—		(65)
	$	(6)	$	(152)	$	(19)	$	56	$	(121)

(1)Represents netting under master netting arrangements and a net cash collateral receivable of $21 million and $35 million as of March 31, 2021 and December 31, 2020, respectively.

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
	Ended March 31,
				Interest
		Commodity		Rate
		Derivatives		Derivatives
2021:
Beginning balance		$	116	$	62
Changes included in earnings(1)		(6)		(21)
Changes in fair value recognized in OCI		(1)		—
Changes in fair value recognized in net regulatory assets		16		—



Settlements		(1)		—

Ending balance		$	124	$	41







2020:
Beginning balance	$	97	$	14
Changes included in earnings(1)	(3)		31

Changes in fair value recognized in net regulatory assets	(40)		—
Purchases	2		—

Settlements	(4)		—

Ending balance	$	52	$	45

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


	As of March 31, 2021				As of December 31, 2020
	Carrying		Fair		Carrying		Fair
	Value		Value		Value		Value

Long-term debt	$	49,461	$	55,926	$	49,866	$	60,633

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 March 31, 2021
Assets:
Commodity derivatives	$	—	$	—	$	48	$	48
Money market mutual funds(1)	86		—		—		86
Investment funds	2		—		—		2
	$	88	$	—	$	48	$	136

Liabilities - commodity derivatives	$	—	$	—	$	(21)	$	(21)

As of December 31, 2020
Assets:
Commodity derivatives	$	—	$	—	$	26	$	26
Money market mutual funds(1)	21		—		—		21
Investment funds	2		—		—		2
	$	23	$	—	$	26	$	49

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

(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
	Ended March 31,
	2021		2020

Beginning balance	$	15	$	(8)
Changes in fair value recognized in regulatory assets	11		(31)

Settlements	1		1
Ending balance	$	27	$	(38)

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


	As of March 31, 2021				As of December 31, 2020
	Carrying		Fair		Carrying		Fair
	Value		Value		Value		Value

Long-term debt	$	2,497	$	2,991	$	2,496	$	3,245

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 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 March 31, 2021
Assets:
Commodity derivatives	$	—	$	53	$	—	$	(4)	$	49
Money market mutual funds(2)	36		—		—		—		36
Investment funds	30		—		—		—		30
	$	66	$	53	$	—	$	(4)	$	115

Liabilities - Commodity derivatives	$	—	$	(53)	$	—	$	21	$	(32)

As of December 31, 2020
Assets:
Commodity derivatives	$	—	$	36	$	—	$	(3)	$	33
Money market mutual funds(2)	6		—		—		—		6
Investment funds	25		—		—		—		25
	$	31	$	36	$	—	$	(3)	$	64

Liabilities - Commodity derivatives	$	—	$	(53)	$	—	$	27	$	(26)

(1)Represents netting under master netting arrangements and a net cash collateral receivable of $17 million and $24 million as of March 31, 2021 and December 31, 2020, 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 March 31, 2021				As of December 31, 2020
	Carrying		Fair		Carrying		Fair
	Value		Value		Value		Value

Long-term debt	$	8,613	$	10,198	$	8,612	$	10,995

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 March 31, 2021:
Assets:
Commodity derivatives	$	—	$	3	$	2	$	(2)	$	3
Money market mutual funds(2)	38		—		—		—		38
Debt securities:
United States government obligations	210		—		—		—		210
International government obligations	—		5		—		—		5
Corporate obligations	—		71		—		—		71
Municipal obligations	—		2		—		—		2
Agency, asset and mortgage-backed obligations	—		5		—		—		5
Equity securities:
United States companies	395		—		—		—		395
International companies	8		—		—		—		8
Investment funds	24		—		—		—		24
	$	675	$	86	$	2	$	(2)	$	761

Liabilities - commodity derivatives	$	—	$	(1)	$	(1)	$	2	$	—


	Input Levels for Fair Value Measurements
	Level 1		Level 2		Level 3		Other(1)		Total
As of December 31, 2020:
Assets:
Commodity derivatives	$	—	$	4	$	5	$	(5)	$	4
Money market mutual funds(2)	41		—		—		—		41
Debt securities:
United States government obligations	200		—		—		—		200
International government obligations	—		5		—		—		5
Corporate obligations	—		73		—		—		73
Municipal obligations	—		2		—		—		2
Agency, asset and mortgage-backed obligations	—		6		—		—		6
Equity securities:
United States companies	381		—		—		—		381
International companies	9		—		—		—		9
Investment funds	17		—		—		—		17
	$	648	$	90	$	5	$	(5)	$	738

Liabilities - commodity derivatives	$	—	$	(4)	$	(3)	$	5	$	(2)

(1)Represents netting under master netting arrangements and a net cash collateral receivable of $— million as of March 31, 2021 and December 31, 2020, 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 March 31, 2021				As of December 31, 2020
	Carrying Value		Fair Value		Carrying Value		Fair Value

Long-term debt	$	7,224	$	8,305	$	7,210	$	9,130

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


	As of March 31, 2021				As of December 31, 2020
	Carrying Value		Fair Value		Carrying Value		Fair Value

Long-term debt	$	7,464	$	8,622	$	7,450	$	9,466

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 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 March 31, 2021
Assets:
Commodity derivatives	$	—	$	—	$	16	$	16
Money market mutual funds(1)	5		—		—		5

	$	5	$	—	$	16	$	21

Liabilities - commodity derivatives	$	—	$	—	$	(4)	$	(4)

As of December 31, 2020
Assets:
Commodity derivatives	$	—	$	—	$	9	$	9
Money market mutual funds(1)	17		—		—		17

	$	17	$	—	$	9	$	26

Liabilities - commodity derivatives	$	—	$	—	$	(2)	$	(2)

(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.

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


	As of March 31, 2021				As of December 31, 2020
	Carrying		Fair		Carrying		Fair
	Value		Value		Value		Value

Long-term debt	$	1,164	$	1,312	$	1,164	$	1,358

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 Eastern Energy Gas' 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		Total
As of March 31, 2021
Assets:

Foreign currency exchange rate derivatives	$	—	$	12	$	—	$	12
Money market mutual funds(1)	71		—		—		71
Investment funds	12		—		—		12
	$	83	$	12	$	—	$	95

Liabilities:

Foreign currency exchange rate derivatives	$	—	$	(1)	$	—	$	(1)
Interest rate derivatives	—		(3)		—		(3)
	$	—	$	(4)	$	—	$	(4)

As of December 31, 2020
Assets:

Foreign currency exchange rate derivatives	$	—	$	20	$	—	$	20

	$	—	$	20	$	—	$	20

Liabilities:
Commodity derivatives	$	—	$	(1)	$	—	$	(1)
Foreign currency exchange rate derivatives	—		(2)		—		(2)
Interest rate derivatives	—		(6)		—		(6)
	$	—	$	(9)	$	—	$	(9)

(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.

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


	As of March 31, 2021				As of December 31, 2020
	Carrying		Fair		Carrying		Fair
	Value		Value		Value		Value

Long-term debt	$	4,414	$	4,744	$	4,425	$	5,012

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Revenue from Contracts with Customers (Tables)

3 Months Ended

Mar. 31, 2021

Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction

Energy Products and Services


	For the Three-Month Period Ended March 31, 2021
	PacifiCorp		MidAmerican Funding		NV Energy		Northern Powergrid		BHE Pipeline Group		BHE Transmission		BHE Renewables		BHE and Other(1)		Total
Customer Revenue:
Regulated:
Retail electric	$	1,145	$	452	$	511	$	—	$	—	$	—	$	—	$	—	$	2,108
Retail gas	—		460		38		—		—		—		—		—		498
Wholesale	36		125		15		—		17		—		—		—		193
Transmission and distribution	25		15		21		263		—		172		—		—		496
Interstate pipeline	—		—		—		—		815		—		—		(41)		774
Other	23		—		—		—		2		—		—		—		25
Total Regulated	1,229		1,052		585		263		834		172		—		(41)		4,094
Nonregulated	—		10		—		10		237		8		166		187		618
Total Customer Revenue	1,229		1,062		585		273		1,071		180		166		146		4,712
Other revenue	13		5		6		27		22		—		24		40		137
Total	$	1,242	$	1,067	$	591	$	300	$	1,093	$	180	$	190	$	186	$	4,849


	For the Three-Month Period Ended March 31, 2020
	PacifiCorp		MidAmerican Funding		NV Energy		Northern Powergrid		BHE Pipeline Group		BHE Transmission		BHE Renewables		BHE and Other(1)		Total
Customer Revenue:
Regulated:
Retail electric	$	1,122	$	410	$	529	$	—	$	—	$	—	$	—	$	—	$	2,061
Retail gas	—		187		47		—		—		—		—		—		234
Wholesale	—		64		14		—		—		—		—		(1)		77
Transmission and distribution	22		15		23		233		—		169		—		—		462
Interstate pipeline	—		—		—		—		400		—		—		(48)		352
Other	26		—		1		—		—		—		—		—		27
Total Regulated	1,170		676		614		233		400		169		—		(49)		3,213
Nonregulated	—		6		1		7		—		3		159		127		303
Total Customer Revenue	1,170		682		615		240		400		172		159		78		3,516
Other revenue	36		4		7		26		1		—		19		25		118
Total	$	1,206	$	686	$	622	$	266	$	401	$	172	$	178	$	103	$	3,634

Remaining Performance Obligations

HomeServices [Member]

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

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




	Three-Month Periods
	Ended March 31,
		2021		2020
Customer Revenue:
Retail:
Residential		$	483	$	460
Commercial		359		358
Industrial		271		277
Other retail		32		27
Total retail		1,145		1,122
Wholesale (1)		36		—
Transmission		25		22
Other Customer Revenue		23		26
Total Customer Revenue		1,229		1,170
Other revenue		13		36
Total operating revenue		$	1,242	$	1,206


	For the Three-Month Period Ended March 31, 2021
		Electric		Natural Gas		Other		Total
Customer Revenue:
Retail:
Residential		$	161	$	308	$	—	$	469
Commercial		71		129		—		200
Industrial		190		12		—		202
Natural gas transportation services		—		10		—		10
Other retail(1)		30		1		—		31
Total retail		452		460		—		912
Wholesale		74		51		—		125
Multi-value transmission projects		15		—		—		15
Other Customer Revenue		—		—		10		10
Total Customer Revenue		541		511		10		1,062
Other revenue		4		1		—		5
Total operating revenue		$	545	$	512	$	10	$	1,067


	For the Three-Month Period Ended March 31, 2020
		Electric		Natural Gas		Other		Total
Customer Revenue:
Retail:
Residential		$	148	$	128	$	—	$	276
Commercial		70		43		—		113
Industrial		163		4		—		167
Natural gas transportation services		—		11		—		11
Other retail(1)		29		—		—		29
Total retail		410		186		—		596
Wholesale		42		22		—		64
Multi-value transmission projects		16		—		—		16
Other Customer Revenue		—		—		1		1
Total Customer Revenue		468		208		1		677
Other revenue		3		1		—		4
Total operating revenue		$	471	$	209	$	1	$	681

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


	Three-Month Periods
	Ended March 31,
	2021		2020
Customer Revenue:
Retail:
Residential	$	196	$	193
Commercial	84		94
Industrial	63		70
Other	3		3
Total fully bundled	346		360
Distribution only service	5		7
Total retail	351		367
Wholesale, transmission and other	14		16
Total Customer Revenue	365		383
Other revenue	5		6
Total revenue	$	370	$	389


	Three-Month Periods
	Ended March 31,
	2021						2020
	Electric		Natural Gas		Total		Electric		Natural Gas		Total
Customer Revenue:
Retail:
Residential	$	71	$	25	$	96	$	69	$	30	$	99
Commercial	54		10		64		57		13		70
Industrial	39		3		42		41		4		45
Other	1		—		1		1		—		1
Total fully bundled	165		38		203		168		47		215
Distribution only service	1		—		1		1		—		1
Total retail	166		38		204		169		47		216
Wholesale, transmission and other	15		—		15		14		—		14
Total Customer Revenue	181		38		219		183		47		230
Other revenue	—		1		1		1		1		2
Total revenue	$	181	$	39	$	220	$	184	$	48	$	232

Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction

The following table summarizes Eastern Energy Gas' energy products and services revenue by regulated and nonregulated (in millions):


	Three-Month Periods
	Ended March 31,
	2021		2020
Customer Revenue:
Regulated:
Gas transportation and storage	$	279	$	344
Wholesale	17		2
Other	—		1
Total regulated	296		347




Nonregulated	190		208
Total Customer Revenue	486		555
Other revenue	—		1
Total operating revenue	$	486	$	556


	Performance obligations expected to be satisfied
	Less than 12 months		More than 12 months		Total
Eastern Energy Gas	$	1,564	$	16,115	$	17,679

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Components of Accumulated Other Comprehensive Loss, Net (Tables)

3 Months Ended

Mar. 31, 2021

Accumulated Other Comprehensive Income (Loss) [Line Items]

Components of Accumulated Other Comprehensive Loss, Net


	Unrecognized		Foreign		Unrealized		AOCI
	Amounts on		Currency		(Losses) Gains		Attributable
	Retirement		Translation		on Cash		To BHE
	Benefits		Adjustment		Flow Hedges		Shareholders, Net

Balance, December 31, 2019	$	(417)	$	(1,296)	$	7	$	(1,706)

Other comprehensive income (loss)	34		(548)		(33)		(547)
Balance, March 31, 2020	$	(383)	$	(1,844)	$	(26)	$	(2,253)

Balance, December 31, 2020	$	(482)	$	(1,062)	$	(8)	$	(1,552)
Other comprehensive income	7		91		14		112
Balance, March 31, 2021	$	(475)	$	(971)	$	6	$	(1,440)

Accumulated Other Comprehensive Income (Loss) [Line Items]

Components of Accumulated Other Comprehensive Loss, Net

The following table shows the change in accumulated other comprehensive loss by each component of other comprehensive income (loss), net of applicable income tax (in millions):


	Unrecognized						Accumulated
	Amounts On		Unrealized				Other
	Retirement		Losses on Cash		Noncontrolling		Comprehensive
	Benefits		Flow Hedges		Interests		Loss, Net
Balance, December 31, 2019	$	(106)	$	(81)	$	—	$	(187)
Other comprehensive income (loss)	1		(85)		—		(84)
Balance, March 31, 2020	$	(105)	$	(166)	$	—	$	(271)

Balance, December 31, 2020	$	(12)	$	(51)	$	10	$	(53)
Other comprehensive income (loss)	2		10		(4)		8
Balance, March 31, 2021	$	(10)	$	(41)	$	6	$	(45)

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Segment Information (Tables)

3 Months Ended

Mar. 31, 2021

Schedule of Segment Reporting Information, by Segment


	Three-Month Periods
	Ended March 31,
		2021		2020
Operating revenue:
PacifiCorp		$	1,242	$	1,206
MidAmerican Funding		1,067		686
NV Energy		591		622
Northern Powergrid		300		266
BHE Pipeline Group		1,093		401
BHE Transmission		180		172
BHE Renewables		190		178
HomeServices		1,232		893
BHE and Other(1)		186		103
Total operating revenue		$	6,081	$	4,527





Depreciation and amortization:
PacifiCorp	$	264	$	252
MidAmerican Funding	207		176
NV Energy	136		124
Northern Powergrid	71		63
BHE Pipeline Group	118		64
BHE Transmission	58		60
BHE Renewables	60		71
HomeServices	11		11
BHE and Other(1)	2		—
Total depreciation and amortization	$	927	$	821


	Three-Month Periods
	Ended March 31,
		2021		2020
Operating income:
PacifiCorp		$	234	$	234
MidAmerican Funding		48		102
NV Energy		70		79
Northern Powergrid		151		132
BHE Pipeline Group		618		249
BHE Transmission		81		76
BHE Renewables		33		17
HomeServices		112		20
BHE and Other(1)		(14)		10
Total operating income		1,333		919
Interest expense		(530)		(483)
Capitalized interest		14		17
Allowance for equity funds		26		34
Interest and dividend income		21		20
(Losses) gains on marketable securities, net		(1,118)		27
Other, net		8		(27)
Total (loss) income before income tax benefit and equity loss		$	(246)	$	507





Interest expense:
PacifiCorp	$	107	$	102
MidAmerican Funding	78		81
NV Energy	52		58
Northern Powergrid	33		32
BHE Pipeline Group	38		14
BHE Transmission	38		38
BHE Renewables	40		42
HomeServices	1		5
BHE and Other(1)	143		111
Total interest expense	$	530	$	483


(Loss) earnings on common shares:
PacifiCorp	$	169	$	176
MidAmerican Funding	144		150
NV Energy	34		20
Northern Powergrid	104		87
BHE Pipeline Group	383		179
BHE Transmission	59		55
BHE Renewables	16		95
HomeServices	84		10
BHE and Other	(1,027)		(102)
(Loss) earnings on common shares	$	(34)	$	670


	As of
	March 31,		December 31,
	2021		2020
Assets:
PacifiCorp	$	26,956	$	26,862
MidAmerican Funding	24,098		23,530
NV Energy	14,594		14,501
Northern Powergrid	8,980		8,782
BHE Pipeline Group	19,651		19,541
BHE Transmission	9,341		9,208
BHE Renewables	11,935		12,004
HomeServices	5,186		4,955
BHE and Other(1)	6,781		7,933
Total assets	$	127,522	$	127,316

Schedule of Goodwill

The following table shows the change in the carrying amount of goodwill by reportable segment for the three-month period ended March 31, 2021 (in millions):


									BHE Pipeline Group
	PacifiCorp		MidAmerican Funding		NV Energy		Northern Powergrid				BHE Transmission		BHE Renewables		HomeServices
																	Total

December 31, 2020	$	1,129	$	2,102	$	2,369	$	1,000	$	1,803	$	1,551	$	95	$	1,457	$	11,506
Acquisitions	—		—		—		—		—		—		—		1		1
Foreign currency translation	—		—		—		6		—		21		—		—		27

March 31, 2021	$	1,129	$	2,102	$	2,369	$	1,006	$	1,803	$	1,572	$	95	$	1,458	$	11,534

Schedule of Segment Reporting Information, by Segment

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


	Three-Month Periods
	Ended March 31,
		2021		2020
Operating revenue:
Regulated electric		$	545	$	471
Regulated natural gas		512		209
Other		10		1
Total operating revenue		$	1,067	$	681

Operating income:
Regulated electric		$	9	$	59
Regulated natural gas		39		39

Total operating income		48		98
Interest expense		(74)		(76)
Allowance for borrowed funds		2		3
Allowance for equity funds		6		8
Other, net		11		(5)
(Loss) income before income tax benefit		$	(7)	$	28


	As of
	March 31, 2021		December 31, 2020
Assets:
Regulated electric	$	20,272	$	19,892
Regulated natural gas	1,725		1,544
Other	3		1
Total assets	$	22,000	$	21,437

Schedule of Segment Reporting Information, by Segment

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


	Three-Month Periods
	Ended March 31,
		2021		2020
Operating revenue:
Regulated electric		$	545	$	471
Regulated natural gas		512		209
Other		10		6
Total operating revenue		$	1,067	$	686

Operating income:
Regulated electric		$	9	$	59
Regulated natural gas		39		39
Other		—		4
Total operating income		48		102
Interest expense		(78)		(81)
Allowance for borrowed funds		2		3
Allowance for equity funds		6		8
Other, net		10		(6)
(Loss) income before income tax benefit		$	(12)	$	26


	As of
	March 31, 2021		December 31, 2020
Assets(1):
Regulated electric	$	21,463	$	21,083
Regulated natural gas	1,804		1,623
Other	7		5
Total assets	$	23,274	$	22,711


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

Schedule of Segment Reporting Information, by Segment

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


	Three-Month Periods
	Ended March 31,
	2021		2020
Operating revenue:
Regulated electric	$	181	$	184
Regulated natural gas	39		48
Total operating revenue	$	220	$	232





















Operating income:
Regulated electric	$	31	$	33
Regulated natural gas	8		7
Total operating income	39		40
Interest expense	(14)		(14)

Allowance for equity funds	1		1
Other, net	6		1
Income before income tax expense	$	32	$	28










	As of
		March 31,		December 31,
		2021		2020
Assets:
Regulated electric		$	3,589	$	3,540
Regulated natural gas		348		342
Other(1)		26		37
Total assets		$	3,963	$	3,919

(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 (Tables)

3 Months Ended

Mar. 31, 2021

Schedule of Related Party Transactions


Sales of natural gas and transportation and storage services	$	64
Purchases of natural gas and transportation and storage services	3
Services provided by related parties(1)	43
Services provided to related parties(2)	32

(1) Includes capitalized expenditures of $3 million.

(2) Amount primarily attributable to Atlantic Coast Pipeline, LLC, a related-party VIE prior to the GT&S Transaction.

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General (Details)	3 Months Ended
General (Details)	Mar. 31, 2021 OwnedAndOperatedCompanies OperatingSegments
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of reportable segments \| OperatingSegments	8
Number of owned and operated utility companies in the United States	4
Number of states owned and operated utility companies serve customers	11
Number of owned and operated electricity distribution companies in Great Britain	2
Number of owned and operated interstate natural gas pipeline companies in the United States	5
Number of owned and operated electricity transmission companies in Canada	1
Number of owned and operated 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

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General - EEGH (Details) - Eastern Energy Gas Holdings, LLC [Member] - mi	1 Months Ended		3 Months Ended
	Nov. 30, 2020	Jul. 31, 2020	Mar. 31, 2021
Cove Point LNG, LP [Member]
Variable Interest Entity [Line Items]
Percentage interest distributed		25.00%
Cove Point LNG, LP [Member] \| Disposal Group, Disposed of by Means Other than Sale, Not Discontinued Operations [Member] \| GT&S Transaction [Member]
Variable Interest Entity [Line Items]
Percentage interest distributed	50.00%
Iroquois Gas Transmission System L.P. [Member]
Variable Interest Entity [Line Items]
Variable interest entity, ownership percentage			50.00%
Variable Interest Entity, Primary Beneficiary [Member] \| General Partner [Member] \| Cove Point LNG, LP [Member]
Variable Interest Entity [Line Items]
Variable interest entity, ownership percentage			100.00%
Variable Interest Entity, Primary Beneficiary [Member] \| Limited Partner [Member] \| Cove Point LNG, LP [Member]
Variable Interest Entity [Line Items]
Variable interest entity, ownership percentage			25.00%
Variable Interest Entity, Primary Beneficiary [Member] \| Federal Energy Regulatory Commission \| Iroquois Gas Transmission System L.P. [Member]
Variable Interest Entity [Line Items]
Miles of interstate natural gas transportation pipeline			416

XML 109 R68.htm IDEA: XBRL DOCUMENT

Business Combination Disclosure Business Combination Disclosure (Details) $ in Millions				3 Months Ended		10 Months Ended	12 Months Ended
	Nov. 02, 2020 USD ($)	Nov. 01, 2020 USD ($) mi Bcf	Oct. 29, 2020 USD ($)	Mar. 31, 2021 USD ($)	Mar. 31, 2020 USD ($)	Oct. 31, 2020 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Jul. 03, 2020 USD ($)
Business Acquisition [Line Items]
Preferred Stock, Value, Issued				$ 3,750				$ 3,750
Operating revenue				6,081	$ 4,527
Net Income (Loss) Attributable to Parent				4	670
Goodwill				11,534				$ 11,506
Deferred income taxes and amortization of investment tax credits				(135)	47
Natural Gas Transmission and Storage Business Acquisition [Member]
Business Acquisition [Line Items]
Payments to Acquire Businesses, Gross		$ 2,500
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-term Debt		4,415							$ 5,600
Preferred Stock, Value, Issued			$ 3,750
Preferred Stock, Dividend Rate, Percentage			4.00%
Net Income (Loss) Attributable to Parent				$ 107
Business Acquisition, Accounting Revision Period, Twelve Months				12 months
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets		569
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment		9,254
Goodwill		1,732
Regulatory Assets		108
Deferred income taxes and amortization of investment tax credits						$ 275
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets		1,424
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets		13,362
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities		1,567
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Regulatory Liabilities		661
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other		289
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities		6,932
Noncontrolling Interest, Increase from Business Combination						$ 3,916
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net		2,514
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents		104
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Long-term Debt		1,200
Business Acquisition, Pro Forma Revenue					5,056
Business Acquisition, Pro Forma Net Income (Loss)					$ 773
Natural Gas Transmission and Storage Business Acquisition [Member] \| Goodwill
Business Acquisition [Line Items]
Finite-Lived Intangible Asset, Useful Life				15 years
Natural Gas Transmission and Storage Business Acquisition [Member] \| Domestic Tax Authority and State and Local Jurisdiction
Business Acquisition [Line Items]
Goodwill		$ 900
Natural Gas Transmission and Storage Business Acquisition [Member] \| Natural Gas
Business Acquisition [Line Items]
Operating revenue				$ 559
Natural Gas Transmission and Storage Business Acquisition [Member] \| Variable Interest Entity, Primary Beneficiary [Member] \| Cove Point LNG, LP [Member] \| Other Ownership Interest
Business Acquisition [Line Items]
Variable interest entity, ownership percentage		25.00%
Natural Gas Transmission and Storage Business Acquisition [Member] \| Variable Interest Entity, Primary Beneficiary [Member] \| Cove Point LNG, LP [Member] \| General Partner [Member]
Business Acquisition [Line Items]
Variable interest entity, ownership percentage		100.00%
Natural Gas Transmission and Storage Business Acquisition [Member] \| Variable Interest Entity, Primary Beneficiary [Member] \| Cove Point LNG, LP [Member] \| Limited Partner [Member]
Business Acquisition [Line Items]
Variable interest entity, ownership percentage		25.00%
Natural Gas Transmission and Storage Business Acquisition [Member] \| Iroquois Gas Transmission System L.P. [Member]
Business Acquisition [Line Items]
Equity method investment, ownership percentage		50.00%
Natural Gas Transmission and Storage Business Acquisition [Member] \| Eastern Gas Transmission, Inc. [Member]
Business Acquisition [Line Items]
Ownership Percentage Acquired		100.00%
Natural Gas Transmission and Storage Business Acquisition [Member] \| Carolina Gas Transmission, LLC [Member]
Business Acquisition [Line Items]
Ownership Percentage Acquired		100.00%
Questar Pipeline Group and Dominion Questar Transaction [Member]
Business Acquisition [Line Items]
Payments to Acquire Businesses, Gross	$ 1,300
Questar Pipeline Group and Dominion Questar Transaction [Member] \| Forecast [Member]
Business Acquisition [Line Items]
Payments to Acquire Businesses, Gross							$ 1,300
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-term Debt							$ 430
Natural Gas Transmission and Storage Transaction [Member]
Business Acquisition [Line Items]
Miles of natural gas transmission lines \| mi		5,400
Natural gas transmission lines transportation per day capacity \| Bcf		12.5
Natural gas operated storage capacity \| Bcf		420
Natural gas company-owned working storage capacity \| Bcf		306
Liquefied natural gas storage capacity \| Bcf		14.6

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Property, Plant and Equipment, Net (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Dec. 31, 2020
Property, Plant and Equipment [Line Items]
Property, plant and equipment, net	$ 86,757	$ 86,128
Regulated Operation [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment	104,610	103,397
Accumulated depreciation and amortization	(31,653)	(30,662)
Property, plant and equipment in service, net	72,957	72,735
Construction in Progress, Gross	2,900	3,200
Regulated Operation [Member] \| Utility generation, transmission and distribution systems
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 87,898	86,730
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 [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 16,712	16,667
Regulated Operation [Member] \| Interstate natural gas pipeline assets [Member] \| Minimum [Member]
Property, Plant and Equipment [Line Items]
Depreciable life	3 years
Regulated Operation [Member] \| Interstate natural gas pipeline assets [Member] \| Maximum [Member]
Property, Plant and Equipment [Line Items]
Depreciable life	80 years
Unregulated Operation [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 12,828	12,671
Accumulated depreciation and amortization	(2,337)	(2,586)
Property, plant and equipment in service, net	10,491	10,085
Unregulated Operation [Member] \| Independent power plants
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 7,034	7,012
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	$ 5,794	5,659
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	40 years
Common Facilities [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment in service, net	$ 83,448	82,820
Property, plant and equipment, net	86,757	86,128
Construction in Progress
Property, Plant and Equipment [Line Items]
Construction in Progress, Gross	$ 3,309	$ 3,308

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Property, Plant and Equipment, Net - PacifiCorp (Details) - PacifiCorp [Member] - USD ($)
$ in Millions

3 Months Ended

Mar. 31, 2021

Dec. 31, 2020

Electric Property Plant And Equipment In Service Gross

$ 31,348

$ 30,717

Public utility accumulated depreciation and amortization

(9,980)

(9,838)

Public Utilities Property, Plant And Equipment In Service, Net

21,368

20,879

Public Utilities, Property, Plant and Equipment, Net, Excluding Construction Work In Progress

21,377

20,888

Public Utilities, Property, Plant and Equipment, Construction Work in Progress

1,158

1,542

Property, plant and equipment, net

22,535

22,430

Revised depreciation rates, 2021 depreciation increase

Depreciation

$ 37

Minimum [Member]

Public Utilities, Property, Plant and Equipment, Generation, Useful Life

5 years

15 years

Public Utilities, Property, Plant and Equipment, Transmission, Useful Life

60 years

Public Utilities, Property, Plant and Equipment, Distribution, Useful Life

20 years

Public Utilities, Property, Plant and Equipment, Other Property Plant and Equipment, Useful Life

5 years

Maximum [Member]

Public Utilities, Property, Plant and Equipment, Generation, Useful Life

75 years

59 years

Public Utilities, Property, Plant and Equipment, Transmission, Useful Life

90 years

Public Utilities, Property, Plant and Equipment, Distribution, Useful Life

75 years

Public Utilities, Property, Plant and Equipment, Other Property Plant and Equipment, Useful Life

60 years

Electricity Generation Plant, Non-Nuclear [Member]

Electric Property Plant And Equipment In Service Gross

$ 13,355

12,861

Electric Transmission [Member]

Electric Property Plant And Equipment In Service Gross

7,686

7,632

Electric Distribution [Member]

Electric Property Plant And Equipment In Service Gross

7,725

7,660

Intangible plant [Member]

Electric Property Plant And Equipment In Service Gross

^[1]

1,069

1,054

Other assets

Electric Property Plant And Equipment In Service Gross

$ 1,513

1,510

Computer Software, Intangible Asset | Minimum [Member]

Computer Software, Intangible Asset | Maximum [Member]

5 years

Unregulated Operation [Member]

10 years

Public Utilities, Property, Plant and Equipment, Net, Excluding Construction Work In Progress

$ 9

Unregulated Operation [Member] | Minimum [Member]

Public Utilities, Property, Plant and Equipment, Other Property Plant and Equipment, Useful Life

14 years

Unregulated Operation [Member] | Maximum [Member]

Public Utilities, Property, Plant and Equipment, Other Property Plant and Equipment, Useful Life

95 years

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

XML 112 R71.htm IDEA: XBRL DOCUMENT

Property, Plant and Equipment, Net Property, Plant and Equipment, Net - MEC (Details) - MidAmerican Energy Company [Member] - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Dec. 31, 2020
Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Net, Excluding Construction Work In Progress	$ 18,803	$ 18,773
Public Utilities, Property, Plant and Equipment, Construction Work in Progress	420	506
Property, plant and equipment, net	19,223	19,279
Regulated Operation [Member]
Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Plant in Service, Excluding Construction Work In Progress	25,858	25,669
Public Utilities, Property, Plant and Equipment, Accumulated Depreciation	(7,061)	(6,902)
Public Utilities, Property, Plant and Equipment, Net, Excluding Construction Work In Progress	18,797	18,767
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	$ 17,083	16,980
Public Utilities, Property, Plant and Equipment, Transmission	2,372	2,365
Public Utilities, Property, Plant and Equipment, Distribution	$ 4,433	4,369
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	$ 1,970	$ 1,955
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 113 R72.htm IDEA: XBRL DOCUMENT

Property, Plant and Equipment, Net Property, Plant and Equipment, Net - NPC (Details) - Nevada Power Company [Member] - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Dec. 31, 2020
Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Net, Excluding Construction Work In Progress	$ 6,534	$ 6,559
Public Utilities, Property, Plant and Equipment, Construction Work in Progress	217	142
Property, plant and equipment, net	6,751	6,701
Regulated Operation [Member]
Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Generation or Processing	3,691	3,690
Public Utilities, Property, Plant and Equipment, Transmission	1,465	1,468
Public Utilities, Property, Plant and Equipment, Distribution	3,803	3,771
Public Utilities, Property, Plant and Equipment, Other Property, Plant and Equipment	798	791
Public Utilities, Property, Plant and Equipment, Plant in Service, Excluding Construction Work In Progress	9,757	9,720
Public Utilities, Property, Plant and Equipment, Accumulated Depreciation	3,224	3,162
Public Utilities, Property, Plant and Equipment, Net, Excluding Construction Work In Progress	$ 6,533	6,558
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, Transmission, Useful Life	45 years
Public Utilities, Property, Plant and Equipment, Distribution, Useful Life	20 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, Transmission, Useful Life	70 years
Public Utilities, Property, Plant and Equipment, Distribution, Useful Life	65 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

XML 114 R73.htm IDEA: XBRL DOCUMENT

Property, Plant and Equipment, Net Property, Plant and Equipment, Net - SPPC (Details) - Sierra Pacific Power Company [Member] - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Dec. 31, 2020
Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Net, Excluding Construction Work In Progress	$ 3,026	$ 3,027
Property, plant and equipment, net	3,188	3,164
Common Facilities [Member]
Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Construction Work in Progress	162	137
Property, plant and equipment, net	3,188	3,164
Regulated Operation [Member] \| Electricity Generation Plant, Non-Nuclear [Member]
Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Generation or Processing	1,131	1,130
Public Utilities, Property, Plant and Equipment, Transmission	917	908
Public Utilities, Property, Plant and Equipment, Distribution	1,763	1,754
Public Utilities, Property, Plant and Equipment, Other Property, Plant and Equipment	$ 193	189
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, Transmission, Useful Life	50 years
Public Utilities, Property, Plant and Equipment, Distribution, Useful Life	20 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, Transmission, Useful Life	100 years
Public Utilities, Property, Plant and Equipment, Distribution, 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	$ 431	429
Public Utilities, Property, Plant and Equipment, Other Property, Plant and Equipment	$ 15	15
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	$ 357	355
Public Utilities, Property, Plant and Equipment, Plant in Service, Excluding Construction Work In Progress	4,807	4,780
Public Utilities, Property, Plant and Equipment, Accumulated Depreciation	1,783	1,755
Public Utilities, Property, Plant and Equipment, Net, Excluding Construction Work In Progress	$ 3,024	3,025
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	$ 2	$ 2
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

XML 115 R74.htm IDEA: XBRL DOCUMENT

Property, Plant and Equipment, Net - EEGH (Details) - Eastern Energy Gas Holdings, LLC [Member] - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Dec. 31, 2020
Property, Plant and Equipment [Line Items]
Plant, net	$ 9,872	$ 9,934
Construction work- in-progress	227	210
Property, plant and equipment, net	10,099	10,144
Regulated Operation [Member]
Property, Plant and Equipment [Line Items]
Plant in service, net	8,499	8,497
Accumulated depreciation and amortization	(2,792)	(2,759)
Plant, net	5,707	5,738
Construction work- in-progress	211	196
Unregulated Operation [Member]
Property, Plant and Equipment [Line Items]
Plant in service, net	4,485	4,479
Accumulated depreciation and amortization	(320)	(283)
Plant, net	4,165	4,196
Interstate natural gas pipeline assets [Member] \| Regulated Operation [Member]
Property, Plant and Equipment [Line Items]
Plant in service, net	$ 8,385	8,382
Interstate natural gas pipeline assets [Member] \| Regulated Operation [Member] \| Minimum [Member]
Property, Plant and Equipment [Line Items]
Depreciable life	24 years
Interstate natural gas pipeline assets [Member] \| Regulated Operation [Member] \| Maximum [Member]
Property, Plant and Equipment [Line Items]
Depreciable life	43 years
Intangible plant [Member] \| Regulated Operation [Member]
Property, Plant and Equipment [Line Items]
Plant in service, net	$ 114	115
Intangible plant [Member] \| Regulated Operation [Member] \| Minimum [Member]
Property, Plant and Equipment [Line Items]
Depreciable life	5 years
Intangible plant [Member] \| Regulated Operation [Member] \| Maximum [Member]
Property, Plant and Equipment [Line Items]
Depreciable life	10 years
Intangible plant [Member] \| Unregulated Operation [Member]
Property, Plant and Equipment [Line Items]
Depreciable life	14 years
Plant in service, net	$ 25	25
LNG facility [Member] \| Unregulated Operation [Member]
Property, Plant and Equipment [Line Items]
Depreciable life	40 years
Plant in service, net	$ 4,460	$ 4,454

XML 116 R75.htm IDEA: XBRL DOCUMENT

Investments and Restricted Cash and Cash Equivalents and Investments (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Investments:
Investments	$ 5,513		$ 6,600
Equity Method Investments [Abstract]
Equity method investments	6,827		7,067
Restricted cash and cash equivalents:
Restricted cash and investments	827		831
Investments, including equity method investments and restricted cash and investments	13,167		14,498
Investments, including equity method investments and restricted cash and investments, current	157		178
Investments, including equity method investments and restricted cash and investments, noncurrent	13,010		14,320
Marketable Securities, Gain (Loss)	(1,119)	$ 25
Marketable Securities, Realized Gain (Loss)	1	2
Gain on Sale of Investments	(1,118)	27
Equity loss	(179)	(18)
Recognized Renewable Energy Production Tax Credits	315	$ 233
Quad Cities Station nuclear decommissioning trust funds [Member]
Restricted cash and cash equivalents:
Decommissioning fund investments, fair value	697		676
Other restricted cash and investments [Member]
Restricted cash and cash equivalents:
Restricted cash and investments	130		155
Equity Method Investments, tax equity investments [Member]
Equity Method Investments [Abstract]
Equity method investments	5,399		5,626
Restricted cash and cash equivalents:
Equity loss	218
Recognized Renewable Energy Production Tax Credits	148
Other Tax Expense (Benefit)	47
Equity Method Investments, tax equity investments [Member] \| Domestic Tax Authority and State and Local Jurisdiction
Restricted cash and cash equivalents:
Equity loss	23
Iroquois Gas Transmission System L.P. [Member]
Equity Method Investments [Abstract]
Equity method investments	586		580
ETT [Member]
Equity Method Investments [Abstract]
Equity method investments	581		594
JAX LNG, LLC
Equity Method Investments [Abstract]
Equity method investments	80		75
Bridger Coal Company [Member]
Equity Method Investments [Abstract]
Equity method investments	68		74
Other equity method investments [Member]
Equity Method Investments [Abstract]
Equity method investments	113		118
Equity Method Investments, impacted tax equity investments
Equity Method Investments [Abstract]
Equity method investments	2,800
BYD Company Limited common stock [Member]
Investments:
Available-for-sale securities, equity securities	4,773		5,897
Restricted cash and cash equivalents:
Marketable Securities, Gain (Loss)	1,124
Rabbi trusts [Member]
Investments:
Rabbi trusts, amount	452		440
Other investments [Member]
Investments:
Other investments	$ 288		$ 263

XML 117 R76.htm IDEA: XBRL DOCUMENT

Investments and Restricted Cash and Cash Equivalents and Investments - EEGH -Components (Details) - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020
Investments:
Investments	$ 5,513	$ 6,600
Equity method investments:
Equity method investments	6,827	7,067
Restricted cash and cash equivalents:
Restricted cash and cash equivalents	827	831
Investments, including equity method investments and restricted cash and investments, current	157	178
Investments, including equity method investments and restricted cash and investments, noncurrent	13,010	14,320
Investments, including equity method investments and restricted cash and investments	13,167	14,498
Eastern Energy Gas Holdings, LLC [Member]
Investments:
Investments	262	244
Restricted cash and cash equivalents:
Restricted cash and cash equivalents	9	13
Investments, including equity method investments and restricted cash and investments, current	9	13
Investments, including equity method investments and restricted cash and investments, noncurrent	262	244
Investments, including equity method investments and restricted cash and investments	271	257
Eastern Energy Gas Holdings, LLC [Member] \| Customer Deposits [Member]
Restricted cash and cash equivalents:
Restricted cash and cash equivalents	9	13
Iroquois Gas Transmission System L.P. [Member]
Equity method investments:
Equity method investments	586	580
Iroquois Gas Transmission System L.P. [Member] \| Eastern Energy Gas Holdings, LLC [Member]
Equity method investments:
Equity method investments	250	244
Investment funds [Member] \| Eastern Energy Gas Holdings, LLC [Member]
Investments:
Investment funds	$ 12	$ 0

XML 118 R77.htm IDEA: XBRL DOCUMENT

Investments and Restricted Cash and Cash Equivalents and Investments - EEGH - Narrative (Details) - Eastern Energy Gas Holdings, LLC [Member] - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Investments And Restricted Cash And Investments [Line Items]
Investment exceeded share of equity in net assets	$ 130		$ 130
Distributions received from investments	$ 10	$ 15
Iroquois Gas Transmission System L.P. [Member]
Investments And Restricted Cash And Investments [Line Items]
Equity method investment, ownership percentage	50.00%
White River Hub, LLC [Member]
Investments And Restricted Cash And Investments [Line Items]
Equity method investment, ownership percentage	50.00%

XML 119 R78.htm IDEA: XBRL DOCUMENT

Investments and Restricted Cash and Cash Equivalents and Investments - EEGH - Reconciliation (Details) - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020	Dec. 31, 2019
Condensed Cash Flow Statements, Captions [Line Items]
Cash and cash equivalents	$ 1,276	$ 1,290
Restricted cash and cash equivalents	117	140
Total cash and cash equivalents and restricted cash and cash equivalents	1,406	1,445	$ 2,304	$ 1,268
Investments	5,513	6,600
Eastern Energy Gas Holdings, LLC [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Cash and cash equivalents	106	35
Restricted cash and cash equivalents	9	13
Total cash and cash equivalents and restricted cash and cash equivalents	115	48	$ 58	$ 39
Investments	$ 262	$ 244

XML 120 R79.htm IDEA: XBRL DOCUMENT

Regulatory Matters - EEGH (Details) - USD ($) $ in Millions		1 Months Ended		3 Months Ended	12 Months Ended
Regulatory Matters - EEGH (Details) - USD ($) $ in Millions	Aug. 01, 2020	Dec. 31, 2020	Jan. 31, 2020	Oct. 31, 2020	Dec. 31, 2018
Eastern Gas Transmission and Storage, Inc. [Member] \| FERC Case, Disallowance Of Capitalized AFUDC, Resolved In December 2020
Schedule Of Regulatory Assets and Liabilities [Line Items]
Litigation settlement expense		$ 43
Litigation settlement expense, after-tax		$ 31
Eastern Gas Transmission and Storage, Inc. [Member] \| 2012 FERC Case, Disallowance Of Plant, Resolved In Q4 2018
Schedule Of Regulatory Assets and Liabilities [Line Items]
Litigation settlement expense					$ 129
Litigation settlement expense, after-tax					$ 94
General Rate Case [Member] \| Federal Energy Regulatory Commission \| Cove Point LNG, LP [Member]
Schedule Of Regulatory Assets and Liabilities [Line Items]
Proposed annual cost-of-service			$ 182
General Rate Case, Increase In Revenue \| Federal Energy Regulatory Commission \| Cove Point LNG, LP [Member]
Schedule Of Regulatory Assets and Liabilities [Line Items]
Approved rate increase (decrease) amount	$ 4
General Rate Case, Decrease In Depreciation Expense \| Federal Energy Regulatory Commission \| Cove Point LNG, LP [Member]
Schedule Of Regulatory Assets and Liabilities [Line Items]
Approved rate increase (decrease) amount	$ (1)
General Rate Case, Provision \| Federal Energy Regulatory Commission \| Cove Point LNG, LP [Member]
Schedule Of Regulatory Assets and Liabilities [Line Items]
Approved rate increase (decrease) amount				$ 7

XML 121 R80.htm IDEA: XBRL DOCUMENT

Regulatory Matters - MEC (Details) $ in Millions	Mar. 31, 2021 USD ($)
MidAmerican Energy Company [Member]
Schedule Of Regulatory Assets and Liabilities [Line Items]
Adjustment Clause Accounts Receivable Payable	$ 245

XML 122 R81.htm IDEA: XBRL DOCUMENT

Cash and Cash Equivalents and Restricted Cash and Cash Equivalents Supplemental Cash Flow Disclosure (Details) - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020	Dec. 31, 2019
Condensed Cash Flow Statements, Captions [Line Items]
Cash and cash equivalents	$ 1,276	$ 1,290
Restricted cash and cash equivalents	117	140
Restricted Cash and Cash Equivalents, Noncurrent	13	15
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	$ 1,406	$ 1,445	$ 2,304	$ 1,268

XML 123 R82.htm IDEA: XBRL DOCUMENT

Cash and Cash Equivalents and Restricted Cash and Cash Equivalents Supplemental Cash Flow Disclosures - MEC (Details) - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020	Dec. 31, 2019
Condensed Cash Flow Statements, Captions [Line Items]
Cash and cash equivalents	$ 1,276	$ 1,290
Restricted cash and cash equivalents	117	140
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	1,406	1,445	$ 2,304	$ 1,268
MidAmerican Energy Company [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Cash and cash equivalents	37	38
Restricted cash and cash equivalents	7	7
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	$ 44	$ 45	$ 128	$ 330

XML 124 R83.htm IDEA: XBRL DOCUMENT

Cash and Cash Equivalents and Restricted Cash and Cash Equivalents Supplemental Cash Flow Disclosures - LLC (Details) - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020	Dec. 31, 2019
Condensed Cash Flow Statements, Captions [Line Items]
Cash and cash equivalents	$ 1,276	$ 1,290
Restricted cash and cash equivalents	117	140
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	1,406	1,445	$ 2,304	$ 1,268
MidAmerican Funding, LLC and Subsidiaries [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Cash and cash equivalents	38	39
Restricted cash and cash equivalents	7	7
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	$ 45	$ 46	$ 128	$ 331

XML 125 R84.htm IDEA: XBRL DOCUMENT

Cash and Cash Equivalents and Restricted Cash and Cash Equivalents Supplemental Cash Flow Disclosure - Pacificorp (Details) - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020	Dec. 31, 2019
Condensed Cash Flow Statements, Captions [Line Items]
Cash and cash equivalents	$ 1,276	$ 1,290
Restricted cash and cash equivalents	117	140
Restricted Cash and Cash Equivalents, Noncurrent	13	15
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	1,406	1,445	$ 2,304	$ 1,268
PacifiCorp [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Cash and cash equivalents	43	13
Restricted cash and cash equivalents	3	4
Restricted Cash and Cash Equivalents, Noncurrent	3	2
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	$ 49	$ 19	$ 60	$ 36

XML 126 R85.htm IDEA: XBRL DOCUMENT

Cash and Cash Equivalents and Restricted Cash and Cash Equivalents Supplemental Cash Flow Disclosure - NPC (Details) - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020	Dec. 31, 2019
Condensed Cash Flow Statements, Captions [Line Items]
Cash and cash equivalents	$ 1,276	$ 1,290
Restricted cash and cash equivalents	117	140
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	1,406	1,445	$ 2,304	$ 1,268
Nevada Power Company [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Cash and cash equivalents	92	25
Restricted cash and cash equivalents	12	11
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	$ 104	$ 36	$ 133	$ 25

XML 127 R86.htm IDEA: XBRL DOCUMENT

Cash and Cash Equivalents and Restricted Cash and Cash Equivalents Supplemental Cash Flow Disclosure - SPPC (Details) - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020	Dec. 31, 2019
Condensed Cash Flow Statements, Captions [Line Items]
Cash and cash equivalents	$ 1,276	$ 1,290
Restricted cash and cash equivalents	117	140
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	1,406	1,445	$ 2,304	$ 1,268
Sierra Pacific Power Company [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Cash and cash equivalents	8	19
Restricted cash and cash equivalents	7	7
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	$ 15	$ 26	$ 33	$ 32

XML 128 R87.htm IDEA: XBRL DOCUMENT

Recent Financing Transactions Recent Financing Transactions - Long-Term Debt (Details) - BHE Pipeline Group [Member] $ in Millions	Mar. 31, 2021 USD ($)
Northern Natural Gas \| Senior Notes, 3.40%, due 2051
Debt Instrument [Line Items]
Face amount	$ 550
Northern Natural Gas \| Senior Notes, 4.25%, due 2021
Debt Instrument [Line Items]
Face amount	$ 200
Subsidiary Debt [Member] \| Senior Notes, 3.40%, due 2051
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	3.40%
Subsidiary Debt [Member] \| Senior Notes, 4.25%, due 2021
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	4.25%

XML 129 R88.htm IDEA: XBRL DOCUMENT

Recent Financing Transactions Recent Financing Transactions - Credit Facilities (Details) $ in Millions	Mar. 31, 2021 USD ($)
AltaLink Investments, L.P. [Member] \| Line of Credit [Member] \| Revolving credit facility, C$200 million, expiring April 2022
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 200

XML 130 R89.htm IDEA: XBRL DOCUMENT

Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended
Income Taxes (Details) - USD ($) $ in Millions	Mar. 31, 2021	Mar. 31, 2020
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Abstract]
Federal statutory income tax rate	21.00%	21.00%
Effective Income Tax Rate Reconciliation, Tax Credit, Percent	136.00%	(46.00%)
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent	21.00%	0.00%
Income tax effect of foreign income	6.00%	(3.00%)
Effects of ratemaking	10.00%	(8.00%)
Effective Income Tax Rate Reconciliation, Equity in Earnings (Losses) of Unconsolidated Subsidiary, Percent	15.00%	(1.00%)
Absence of noncontrolling interest	(9.00%)	0.00%
Other, net	(1.00%)	1.00%
Effective income tax rate	217.00%	(36.00%)
Production Tax Credit Carryforwards [Abstract]
Years eligible for federal renewable energy production tax credit	10 years
Related Party Tax Expense [Abstract]
Recognized Renewable Energy Production Tax Credits	$ 315	$ 233
Income tax benefit	535	184
Marketable Securities, Gain (Loss)	(1,119)	25
Income before income tax expense and equity income	246	(507)
Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount	52
Effective Income Tax Rate Reconciliation, Tax Credit, Amount	334
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount	51
Parent Company [Member]
Related Party Tax Expense [Abstract]
Related party transaction, cash paid for income taxes, net	$ 0	$ 100

XML 131 R90.htm IDEA: XBRL DOCUMENT

Income Taxes - PAC (Details) - USD ($) $ in Millions	3 Months Ended
Income Taxes - PAC (Details) - USD ($) $ in Millions	Mar. 31, 2021	Mar. 31, 2020
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Abstract]
Federal statutory income tax rate	21.00%	21.00%
State income tax, net of federal income tax benefit	(21.00%)	0.00%
Effective Income Tax Rate Reconciliation, Tax Credit, Percent	136.00%	(46.00%)
Effects of ratemaking	10.00%	(8.00%)
Other, net	1.00%	(1.00%)
Effective income tax rate	(217.00%)	36.00%
Production Tax Credit Carryforwards [Abstract]
Years eligible for federal renewable energy production tax credit	10 years
PacifiCorp [Member]
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Abstract]
Federal statutory income tax rate	21.00%	21.00%
State income tax, net of federal income tax benefit	3.00%	3.00%
Effective Income Tax Rate Reconciliation, Tax Credit, Percent	(20.00%)	(11.00%)
Effects of ratemaking	(13.00%)	(22.00%)
Other, net	2.00%	0.00%
Effective income tax rate	(7.00%)	(9.00%)
Effective income tax reconciliation, Amortization of excess deferred income taxes, Dollar	$ 3	$ 30
Production Tax Credit Carryforwards [Abstract]
Years eligible for federal renewable energy production tax credit	10 years
BHE [Member] \| PacifiCorp [Member]
Related Party Income Tax Receivable (Payable) [Abstract]
Related party transaction, cash paid for income taxes, net	$ 1	$ 26

XML 132 R91.htm IDEA: XBRL DOCUMENT

Income Taxes - MEC (Details) - USD ($) $ in Millions	3 Months Ended
Income Taxes - MEC (Details) - USD ($) $ in Millions	Mar. 31, 2021	Mar. 31, 2020
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Abstract]
Federal statutory income tax rate	21.00%	21.00%
Effective Income Tax Rate Reconciliation, Tax Credit, Percent	136.00%	(46.00%)
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent	21.00%	0.00%
Effects of ratemaking	10.00%	(8.00%)
Other, net	(1.00%)	1.00%
Effective income tax rate	(217.00%)	36.00%
Production Tax Credit Carryforwards [Abstract]
Years eligible for federal renewable energy production tax credit	10 years
Recognized Renewable Energy Production Tax Credits	$ 315	$ 233
Related Party Income Tax Receivable (Payable) [Abstract]
Income tax benefit	(535)	(184)
Income before income tax expense and equity income	(246)	$ 507
Effective Income Tax Rate Reconciliation, Tax Credit, Amount	334
Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount	$ 52
MidAmerican Energy Company [Member]
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Abstract]
Federal statutory income tax rate	21.00%	21.00%
Effective Income Tax Rate Reconciliation, Tax Credit, Percent	2400.00%	(430.00%)
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent	(29.00%)	(28.00%)
Effects of ratemaking	(186.00%)	(3.00%)
Other, net	(6.00%)	1.00%
Effective income tax rate	2200.00%	(439.00%)
Production Tax Credit Carryforwards [Abstract]
Years eligible for federal renewable energy production tax credit	10 years
Recognized Renewable Energy Production Tax Credits	$ 151	$ 120
Related Party Income Tax Receivable (Payable) [Abstract]
Income tax benefit	(154)	(123)
Income before income tax expense and equity income	(7)	28
Effective Income Tax Rate Reconciliation, Tax Credit, Amount	168
Effective Income Tax Rate Reconciliation, Regulatory Differences, Amount	13
Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount	2
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	$ 0	$ (46)
MidAmerican Funding, LLC and Subsidiaries [Member]
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Abstract]
Federal statutory income tax rate	21.00%	21.00%
Effective Income Tax Rate Reconciliation, Tax Credit, Percent	1400.00%	(463.00%)
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent	(8.00%)	(31.00%)
Effects of ratemaking	(108.00%)	(3.00%)
Other, net	(5.00%)	(1.00%)
Effective income tax rate	1300.00%	(477.00%)
Production Tax Credit Carryforwards [Abstract]
Years eligible for federal renewable energy production tax credit	10 years
Recognized Renewable Energy Production Tax Credits	$ 151	$ 120
Related Party Income Tax Receivable (Payable) [Abstract]
Income tax benefit	(156)	(124)
Income before income tax expense and equity income	(12)	26
Effective Income Tax Rate Reconciliation, Tax Credit, Amount	168
Effective Income Tax Rate Reconciliation, Regulatory Differences, Amount	13
Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount	3
MidAmerican Funding, LLC and Subsidiaries [Member] \| Berkshire Hathaway Energy [Member]
Related Party Income Tax Receivable (Payable) [Abstract]
Related party transaction, cash (paid) received for income taxes, net	$ 0	$ (47)

XML 133 R92.htm IDEA: XBRL DOCUMENT

Income Taxes - MidAmerican Funding (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Abstract]
Federal statutory income tax rate	21.00%	21.00%
Effective Income Tax Rate Reconciliation, Tax Credit, Percent	136.00%	(46.00%)
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent	21.00%	0.00%
Effects of ratemaking	10.00%	(8.00%)
Other, net	(1.00%)	1.00%
Effective income tax rate	(217.00%)	36.00%
Production Tax Credit Carryforwards [Abstract]
Years eligible for federal renewable energy production tax credit	10 years
Recognized Renewable Energy Production Tax Credits	$ 315	$ 233
Related Party Income Tax Receivable (Payable) [Abstract]
Income tax benefit	(535)	(184)
Income before income tax expense and equity income	(246)	$ 507
Effective Income Tax Rate Reconciliation, Tax Credit, Amount	334
Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount	$ 52
MidAmerican Funding, LLC and Subsidiaries [Member]
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Abstract]
Federal statutory income tax rate	21.00%	21.00%
Effective Income Tax Rate Reconciliation, Tax Credit, Percent	1400.00%	(463.00%)
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent	(8.00%)	(31.00%)
Effects of ratemaking	(108.00%)	(3.00%)
Other, net	(5.00%)	(1.00%)
Effective income tax rate	1300.00%	(477.00%)
Production Tax Credit Carryforwards [Abstract]
Years eligible for federal renewable energy production tax credit	10 years
Recognized Renewable Energy Production Tax Credits	$ 151	$ 120
Related Party Income Tax Receivable (Payable) [Abstract]
Income tax benefit	(156)	(124)
Income before income tax expense and equity income	(12)	26
Effective Income Tax Rate Reconciliation, Regulatory Differences, Amount	13
Effective Income Tax Rate Reconciliation, Tax Credit, Amount	168
Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount	3
MidAmerican Funding, LLC and Subsidiaries [Member] \| Berkshire Hathaway Energy [Member]
Related Party Income Tax Receivable (Payable) [Abstract]
Related party transaction, cash (paid) received for income taxes, net	$ 0	$ (47)

XML 134 R93.htm IDEA: XBRL DOCUMENT

Income Taxes - SPPC (Details)	3 Months Ended
Income Taxes - SPPC (Details)	Mar. 31, 2021	Mar. 31, 2020
Schedule of Effective Income Tax Rate Reconciliation [Line Items]
Federal statutory income tax rate	21.00%	21.00%
Effects of ratemaking	10.00%	(8.00%)
Other, net	1.00%	(1.00%)
Effective income tax rate	(217.00%)	36.00%
Sierra Pacific Power Company [Member]
Schedule of Effective Income Tax Rate Reconciliation [Line Items]
Federal statutory income tax rate	21.00%	21.00%
Effects of ratemaking	10.00%	8.00%
Other, net	2.00%	(2.00%)
Effective income tax rate	13.00%	11.00%

XML 135 R94.htm IDEA: XBRL DOCUMENT

Income Taxes - EEGH (Details) - USD ($)	3 Months Ended
Income Taxes - EEGH (Details) - USD ($)	Mar. 31, 2021	Mar. 31, 2020
Schedule of Effective Income Tax Rate Reconciliation [Line Items]
Federal statutory income tax rate	21.00%	21.00%
State income tax, net of federal income tax benefit	(21.00%)	0.00%
Equity interest	15.00%	(1.00%)
Absence of noncontrolling interest	(9.00%)	0.00%
Other, net	1.00%	(1.00%)
Effective income tax rate	(217.00%)	36.00%
Eastern Energy Gas Holdings, LLC [Member]
Schedule of Effective Income Tax Rate Reconciliation [Line Items]
Federal statutory income tax rate	21.00%	21.00%
State income tax, net of federal income tax benefit	3.00%	3.00%
Equity interest	2.00%	1.00%
Effects of ratemaking	(1.00%)	(1.00%)
Absence of noncontrolling interest	(11.00%)	(3.00%)
Other, net	(1.00%)	1.00%
Effective income tax rate	13.00%	22.00%
Eastern Energy Gas Holdings, LLC [Member] \| BHE [Member]
Schedule of Effective Income Tax Rate Reconciliation [Line Items]
Related party transaction, cash paid for income taxes, net	$ 0
Eastern Energy Gas Holdings, LLC [Member] \| Cove Point LNG, LP [Member]
Schedule of Effective Income Tax Rate Reconciliation [Line Items]
Ownership interest	75.00%	25.00%

XML 136 R95.htm IDEA: XBRL DOCUMENT

Employee Benefit Plans (Details) - USD ($) $ in Millions	3 Months Ended
Employee Benefit Plans (Details) - USD ($) $ in Millions	Mar. 31, 2021	Mar. 31, 2020
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 2	$ 1
Interest cost	5	6
Expected return on plan assets	(5)	(9)
Net amortization	(1)	(1)
Net periodic benefit cost (credit)	1	(3)
UNITED STATES \| Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	7	3
Interest cost	20	23
Expected return on plan assets	(33)	(35)
Net amortization	6	9
Net periodic benefit cost (credit)	0	0
UNITED KINGDOM \| Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	4	4
Interest cost	8	10
Expected return on plan assets	(28)	(25)
Net amortization	14	10
Net periodic benefit cost (credit)	$ (2)	$ (1)

XML 137 R96.htm IDEA: XBRL DOCUMENT

Employee Benefit Plans - Employer Contributions (Details) - 3 months ended Mar. 31, 2021 £ 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	$ 13
Employer contributions	3
UNITED STATES \| Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, expected contributions in current fiscal year	13
Employer contributions	3
UNITED KINGDOM \| Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, expected contributions in current fiscal year \| £			£ 50
Employer contributions	$ 15	£ 11

Amount of contribution received by defined benefit plan from employer which increases plan assets.

XML 138 R97.htm IDEA: XBRL DOCUMENT

Employee Benefit Plans Employee Benefit Plans - PacifiCorp (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 2	$ 1
Interest cost	5	6
Expected return on plan assets	(5)	(9)
Net amortization	(1)	(1)
Net periodic benefit cost	1	(3)
PacifiCorp [Member] \| Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	0	0
Interest cost	2	3
Expected return on plan assets	(2)	(4)
Net amortization	0	0
Net periodic benefit cost	0	(1)
UNITED STATES \| Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	7	3
Interest cost	20	23
Expected return on plan assets	(33)	(35)
Net amortization	6	9
Net periodic benefit cost	0	0
UNITED STATES \| PacifiCorp [Member] \| Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	0	0
Interest cost	7	9
Expected return on plan assets	(13)	(14)
Net amortization	5	5
Net periodic benefit cost	$ (1)	$ 0

XML 139 R98.htm IDEA: XBRL DOCUMENT

Employee Benefit Plans Employee Benefit Plans - PacifiCorp - Employer Contributions (Details) $ in Millions	3 Months Ended
	Mar. 31, 2021 USD ($)
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, expected contributions in current fiscal year	$ 13
Employer contributions	3
PacifiCorp [Member] \| Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year	1
UNITED STATES \| Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, expected contributions in current fiscal year	13
Employer contributions	3
UNITED STATES \| PacifiCorp [Member] \| Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Employer contributions	1
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year	$ 4

Amount of contribution received by defined benefit plan from employer which increases plan assets.

XML 140 R99.htm IDEA: XBRL DOCUMENT

Employee Benefit Plans - MEC (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Pension Plan [Member] \| UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 7	$ 3
Interest cost	20	23
Expected return on plan assets	(33)	(35)
Net amortization	6	9
Net periodic benefit cost	0	0
Pension Plan [Member] \| UNITED STATES \| MidAmerican Energy Company [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	5	1
Interest cost	6	6
Expected return on plan assets	(9)	(10)
Net periodic benefit cost	2	(3)
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	2	1
Interest cost	5	6
Expected return on plan assets	(5)	(9)
Net amortization	(1)	(1)
Net periodic benefit cost	1	(3)
Other Postretirement Benefits Plan [Member] \| MidAmerican Energy Company [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	2	1
Interest cost	2	2
Expected return on plan assets	(2)	(3)
Net amortization	(1)	(1)
Net periodic benefit cost	$ 1	$ (1)

XML 141 R100.htm IDEA: XBRL DOCUMENT

Employee Benefit Plans Employee Benefit Plans - MEC - Employer Contributions (Details) $ in Millions	3 Months Ended
	Mar. 31, 2021 USD ($)
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, expected contributions in current fiscal year	$ 13
Employer contributions	3
MidAmerican Energy Company [Member] \| Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, expected contributions in current fiscal year	12
Employer contributions	3
UNITED STATES \| Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, expected contributions in current fiscal year	13
Employer contributions	3
UNITED STATES \| MidAmerican Energy Company [Member] \| Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, expected contributions in current fiscal year	7
Employer contributions	$ 2

Amount of contribution received by defined benefit plan from employer which increases plan assets.

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

XML 142 R101.htm IDEA: XBRL DOCUMENT

Employee Benefit Plans - NPC - Amounts Payable (Details) - Nevada Power Company [Member] - UNITED STATES - NV Energy, Inc. [Member] - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020
Other Assets [Member] \| Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets for Plan Benefits, Defined Benefit Plan	$ 4	$ 4
Other Current Liabilities [Member] \| Other Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Liability, Defined Benefit Plan, Current	(1)	(1)
Other Noncurrent Liabilities [Member] \| Other Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Liability, Defined Benefit Plan, Noncurrent	(9)	(9)
Qualified Plan \| Other Assets [Member] \| Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets for Plan Benefits, Defined Benefit Plan	$ 9	$ 8

XML 143 R102.htm IDEA: XBRL DOCUMENT

Employee Benefit Plans - SPPC - Amounts Payable (Details) - Sierra Pacific Power Company [Member] - UNITED STATES - NV Energy, Inc. [Member] - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020
Other Current Liabilities [Member] \| Other Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Liability, Defined Benefit Plan, Current	$ (1)	$ (1)
Other Noncurrent Liabilities [Member] \| Other Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Liability, Defined Benefit Plan, Noncurrent	(8)	(8)
Other Noncurrent Liabilities [Member] \| Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Liability, Defined Benefit Plan, Noncurrent	(14)	(13)
Qualified Plan \| Other Assets [Member] \| Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets for Plan Benefits, Defined Benefit Plan	$ 27	$ 26

XML 144 R103.htm IDEA: XBRL DOCUMENT

Employee Benefit Plans - EEGH - Net Periodic Benefit Cost (Credit) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 2	$ 1
Interest cost	5	6
Expected return on plan assets	(5)	(9)
Net amortization	(1)	(1)
Net periodic benefit cost (credit)	1	(3)
UNITED STATES \| Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	7	3
Interest cost	20	23
Expected return on plan assets	(33)	(35)
Net amortization	6	9
Net periodic benefit cost (credit)	0	0
UNITED STATES \| Pension Plan [Member] \| Eastern Energy Gas Holdings, LLC [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	0	1
Interest cost	0	3
Expected return on plan assets	0	(14)
Net amortization	0	2
Net periodic benefit cost (credit)	0	(8)
UNITED STATES \| Other Postretirement Benefits Plan [Member] \| Eastern Energy Gas Holdings, LLC [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	0	1
Interest cost	0	1
Expected return on plan assets	0	(5)
Net amortization	0	(1)
Net periodic benefit cost (credit)	$ 0	$ (4)

XML 145 R104.htm IDEA: XBRL DOCUMENT

Risk Management and Hedging Activities - PacifiCorp - Balance Sheet Location (Details) - PacifiCorp [Member] - Commodity derivative [Member] - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020	Dec. 31, 2019
Derivatives, Fair Value [Line Items]
Derivative, fair value, net	$ 0	$ (17)
Cash collateral, net receivable, offset against derivative positions	17	24
Derivative assets (liabilities), at fair value, net	17	7
Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative, fair value, net	43	27
Cash collateral, net receivable, offset against derivative positions	0	0
Derivative assets (liabilities), at fair value, net	43	27
Other Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative, fair value, net	6	6
Cash collateral, net receivable, offset against derivative positions	0	0
Derivative assets (liabilities), at fair value, net	6	6
Other Current Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative, fair value, net	(25)	(22)
Cash collateral, net receivable, offset against derivative positions	13	15
Derivative assets (liabilities), at fair value, net	(12)	(7)
Other Noncurrent Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative, fair value, net	(24)	(28)
Cash collateral, net receivable, offset against derivative positions	4	9
Derivative assets (liabilities), at fair value, net	(20)	(19)
Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative asset, fair value, gross asset including not subject to master netting arrangement	53	36
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement	(53)	(53)
Derivative, fair value, net	0	(17)
Net Regulatory Asset (Liability), Unrealized Loss (Gain) On Derivative Contracts	0	17	$ 84	$ 62
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	45	29
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement	(2)	(2)
Derivative, fair value, net	43	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	6	6
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement	0	0
Derivative, fair value, net	6	6
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	2	1
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement	(27)	(23)
Derivative, fair value, net	(25)	(22)
Not Designated as Hedging Instrument [Member] \| Other Noncurrent Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative asset, fair value, gross asset including not subject to master netting arrangement	0	0
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement	(24)	(28)
Derivative, fair value, net	$ (24)	$ (28)

XML 146 R105.htm IDEA: XBRL DOCUMENT

Risk Management and Hedging Activities - PacifiCorp - Not Designated as Hedging Contracts (Details) - PacifiCorp [Member] - Commodity derivative [Member] - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Regulatory Assets (Liabilities), Net, Unrealized Loss (Gain), Net, on Derivative Instruments [Line Items]
Derivative, Fair Value, Net	$ 0		$ (17)
Not Designated as Hedging Instrument [Member]
Regulatory Assets (Liabilities), Net, Unrealized Loss (Gain), Net, on Derivative Instruments [Line Items]
Beginning balance	17	$ 62
Changes in fair value recognized in net regulatory assets	(17)	34
Net (losses) gains reclassified to operating revenue	0	8
Net Gains (Losses) Reclassified To Cost Of Domestic Regulated Electric	0	(20)
Ending balance	0	$ 84
Derivative, Fair Value, Net	$ 0		$ (17)

XML 147 R106.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	Mar. 31, 2021 MWh Dth	Dec. 31, 2020 MWh Dth
Electricity sales, net
Notional Amounts of Outstanding Derivative Positions [Line Items]
Derivative, Nonmonetary Notional Amount \| MWh	0	1
Natural gas purchases
Notional Amounts of Outstanding Derivative Positions [Line Items]
Derivative, Nonmonetary Notional Amount \| Dth	114	100

XML 148 R107.htm IDEA: XBRL DOCUMENT

Risk Management and Hedging Activities - PacifiCorp - Collateral and Contingent Features (Details) - PacifiCorp [Member] - Commodity derivative [Member] - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020
Derivative [Line Items]
Derivative, net liability position, aggregate fair value	$ 52	$ 51
Collateral already posted, aggregate fair value	17	24
Additional collateral, aggregate fair value	$ 30	$ 25

XML 149 R108.htm IDEA: XBRL DOCUMENT

Fair Value Measurements (Details) - USD ($)
$ in Millions

3 Months Ended

Mar. 31, 2021

Mar. 31, 2020

Dec. 31, 2020

Dec. 31, 2019

Recurring [Member]

Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset

^[1]

$ (18)

$ (21)

Derivative liability, fair value, gross asset and right to reclaim cash, offset

8,897

9,918

^[1]

Cash collateral, net receivable, offset against derivative positions

(105)

(121)

Recurring [Member] | Level 1 [Member]

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

6,449

7,562

Recurring [Member] | Level 2 [Member]

(3)

(6)

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

2,265

2,180

Recurring [Member] | Level 3 [Member]

(105)

(152)

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

201

197

Mortgage Loans on Real Estate [Member] | Recurring [Member]

(36)

(19)

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

Mortgage Loans on Real Estate [Member] | Recurring [Member] | Level 1 [Member]

2,065

2,001

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

Mortgage Loans on Real Estate [Member] | Recurring [Member] | Level 2 [Member]

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

Mortgage Loans on Real Estate [Member] | Recurring [Member] | Level 3 [Member]

2,065

2,001

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

Money market mutual funds [Member] | Recurring [Member]

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

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

^[2]

807

873

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

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

^[2]

807

873

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

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

^[2]

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

United States government obligations [Member] | Recurring [Member]

^[2]

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

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

210

200

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

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

210

200

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

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

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

International government obligations [Member] | Recurring [Member]

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

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

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

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

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

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

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

Corporate obligations [Member] | Recurring [Member]

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

Corporate obligations [Member] | Recurring [Member] | Level 1 [Member]

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

Corporate obligations [Member] | Recurring [Member] | Level 2 [Member]

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

Corporate obligations [Member] | Recurring [Member] | Level 3 [Member]

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

Municipal obligations [Member] | Recurring [Member]

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

Municipal obligations [Member] | Recurring [Member] | Level 1 [Member]

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

Municipal obligations [Member] | Recurring [Member] | Level 2 [Member]

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

Municipal obligations [Member] | Recurring [Member] | Level 3 [Member]

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

US Government-sponsored Enterprises Debt Securities [Member] | Recurring [Member]

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

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]

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]

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]

United States companies [Member] | Recurring [Member]

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

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

395

381

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

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

395

381

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

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

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

International companies [Member] | Recurring [Member]

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

International companies [Member] | Recurring [Member] | Level 1 [Member]

4,780

5,906

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

International companies [Member] | Recurring [Member] | Level 2 [Member]

4,780

5,906

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

International companies [Member] | Recurring [Member] | Level 3 [Member]

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

Investment funds [Member] | Recurring [Member]

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

Investment funds [Member] | Recurring [Member] | Level 1 [Member]

256

201

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

Investment funds [Member] | Recurring [Member] | Level 2 [Member]

256

201

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

Investment funds [Member] | Recurring [Member] | Level 3 [Member]

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

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

^[1]

(18)

(21)

Derivative liability, fair value, gross asset and right to reclaim cash, offset

209

188

^[1]

Commodity derivative [Member] | Recurring [Member] | Level 1 [Member]

(81)

(54)

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

(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

Derivative liability, fair value, gross liability including not subject to master netting arrangement

(90)

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

154

135

Derivative liability, fair value, gross liability including not subject to master netting arrangement

(30)

(19)

Foreign Exchange Contract | Recurring [Member]

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

Foreign Exchange Contract | Recurring [Member] | Level 2 [Member]

(1)

(2)

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

(1)

(2)

Interest Rate Contract [Member] | Recurring [Member]

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

Interest Rate Contract [Member] | Recurring [Member] | Level 1 [Member]

(23)

(65)

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)

(5)

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

Derivative liability, fair value, gross liability including not subject to master netting arrangement

(14)

(60)

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

Derivative liability, fair value, gross liability including not subject to master netting arrangement

(6)

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

124

$ 52

116

$ 97

Fair Value, Assets and Liabilities Measured on Recurring Basis, Gain (Loss) Included in Earnings

Fair Value, Measurements with Unobservable Inputs Reconciliation, Recurring Basis, Gain (Loss) Included In Regulatory Assets and Liabilities, Net

(16)

Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases

Fair Value, Measurements With Unobservable Inputs Reconciliation, Recurring Basis, Assets and Liability, Net, Settlements

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

$ 62

$ 14

Fair Value, Assets and Liabilities Measured on Recurring Basis, Gain (Loss) Included in Earnings

(31)

Fair Value, Measurements with Unobservable Inputs Reconciliation, Recurring Basis, Gain (Loss) Included In Regulatory Assets and Liabilities, Net

Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases

Fair Value, Measurements With Unobservable Inputs Reconciliation, Recurring Basis, Assets and Liability, Net, Settlements

$ 0

[1]	Represents netting under master netting arrangements and a net cash collateral receivable of $17 million and $24 million as of March 31, 2021 and December 31, 2020, 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.

XML 150 R109.htm IDEA: XBRL DOCUMENT

Fair Value Measurements - Level 3 (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Commodity derivative [Member]
Fair Value, Assets (Liabilities), Net, Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	$ 116	$ 97
Changes included in earnings	(6)	(3)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Other Comprehensive Income (Loss)	1
Changes in fair value recognized in net regulatory assets	16	(40)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases		2
Settlements	(1)	(4)
Ending balance	124	52
Interest Rate Lock Commitments [Member]
Fair Value, Assets (Liabilities), Net, Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	62	14
Changes included in earnings	(21)	31
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Other Comprehensive Income (Loss)	0
Changes in fair value recognized in net regulatory assets	0	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases		0
Settlements	0	0
Ending balance	$ 41	$ 45

XML 151 R110.htm IDEA: XBRL DOCUMENT

Fair Value Measurements - Debt (Details) - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, carrying value	$ 49,461	$ 49,866
Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, fair value	$ 55,926	$ 60,633

XML 152 R111.htm IDEA: XBRL DOCUMENT

Fair Value Measurements - PacifiCorp (Details) - USD ($)
$ in Millions

Mar. 31, 2021

Dec. 31, 2020

Recurring [Member]

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

Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset

^[1]

$ (18)

$ (21)

Derivative liability, fair value, gross asset and right to reclaim cash, offset

8,897

9,918

^[1]

Cash collateral, net receivable, offset against derivative positions

(105)

(121)

Recurring [Member] | Level 1 [Member]

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

6,449

7,562

Recurring [Member] | Level 2 [Member]

(3)

(6)

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

2,265

2,180

Recurring [Member] | Level 3 [Member]

(105)

(152)

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

201

197

Commodity derivative [Member] | Recurring [Member]

(36)

(19)

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

Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset

^[1]

(18)

(21)

Derivative liability, fair value, gross asset and right to reclaim cash, offset

209

188

^[1]

Commodity derivative [Member] | Recurring [Member] | Level 1 [Member]

(81)

(54)

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

(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

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

(90)

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

154

135

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

(30)

(19)

Money market mutual funds [Member] | Recurring [Member]

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

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

^[2]

807

873

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

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

^[2]

807

873

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

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

^[2]

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

Investment funds [Member] | Recurring [Member]

^[2]

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

Investment funds [Member] | Recurring [Member] | Level 1 [Member]

256

201

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

Investment funds [Member] | Recurring [Member] | Level 2 [Member]

256

201

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

Investment funds [Member] | Recurring [Member] | Level 3 [Member]

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

PacifiCorp [Member] | Recurring [Member]

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

PacifiCorp [Member] | Recurring [Member] | Level 1 [Member]

115

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

PacifiCorp [Member] | Recurring [Member] | Level 2 [Member]

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

PacifiCorp [Member] | Recurring [Member] | Level 3 [Member]

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

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

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

(4)

(3)

Derivative liability, fair value, gross asset and right to reclaim cash, offset

Cash collateral, net receivable, offset against derivative positions

(32)

(26)

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

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

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

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

(53)

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

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

PacifiCorp [Member] | Money market mutual funds [Member] | Recurring [Member]

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

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

^[2]

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

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

^[2]

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

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]

PacifiCorp [Member] | Investment funds [Member] | Recurring [Member]

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

PacifiCorp [Member] | Investment funds [Member] | Recurring [Member] | Level 1 [Member]

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

PacifiCorp [Member] | Investment funds [Member] | Recurring [Member] | Level 2 [Member]

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

PacifiCorp [Member] | Investment funds [Member] | Recurring [Member] | Level 3 [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]

$ 0

[1]	Represents netting under master netting arrangements and a net cash collateral receivable of $17 million and $24 million as of March 31, 2021 and December 31, 2020, 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.

XML 153 R112.htm IDEA: XBRL DOCUMENT

Fair Value Measurements - PacifiCorp - Debt (Details) - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, carrying value	$ 49,461	$ 49,866
Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, fair value	55,926	60,633
PacifiCorp [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, carrying value	8,613	8,612
PacifiCorp [Member] \| Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, fair value	$ 10,198	$ 10,995

XML 154 R113.htm IDEA: XBRL DOCUMENT

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

Mar. 31, 2021

Dec. 31, 2020

Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset

^[1]

$ (18)

$ (21)

Derivative liability, fair value, gross asset and right to reclaim cash, offset

8,897

9,918

^[1]

Cash collateral, net receivable, offset against derivative positions

Money market mutual funds [Member]

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

United States government obligations [Member]

^[2]

807

873

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

International government obligations [Member]

210

200

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]

395

381

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

Investment funds [Member]

4,780

5,906

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]

256

201

Level 1 [Member]

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

6,449

7,562

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

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

^[2]

807

873

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

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

210

200

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]

395

381

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

Level 1 [Member] | Investment funds [Member]

4,780

5,906

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]

256

201

Level 2 [Member]

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

2,265

2,180

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

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

^[2]

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]

201

197

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

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

^[2]

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

^[1]

(18)

(21)

Derivative liability, fair value, gross asset and right to reclaim cash, offset

^[1]

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

(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

(90)

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

154

135

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

(30)

(19)

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

Cash collateral, net receivable, offset against derivative positions

761

738

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

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

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

^[3]

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

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

210

200

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]

395

381

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]

675

648

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]

^[3]

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

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

210

200

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]

395

381

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]

^[3]

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]

^[3]

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

^[4]

(2)

(5)

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

(2)

Derivative liability, fair value, gross asset and right to reclaim cash, offset

^[4]

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

(1)

(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

$ (1)

$ (3)

[1]	Represents netting under master netting arrangements and a net cash collateral receivable of $17 million and $24 million as of March 31, 2021 and December 31, 2020, 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.
[3]	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.
[4]	Represents netting under master netting arrangements and a net cash collateral receivable of $— million as of March 31, 2021 and December 31, 2020, respectively.

XML 155 R114.htm IDEA: XBRL DOCUMENT

Fair Value Measurements - MEC - Debt (Details) - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, carrying value	$ 49,461	$ 49,866
Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, fair value	55,926	60,633
MidAmerican Energy Company [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, carrying value	7,224	7,210
Long-term debt, fair value		$ 9,130
MidAmerican Energy Company [Member] \| Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, fair value	$ 8,305

XML 156 R115.htm IDEA: XBRL DOCUMENT

Fair Value Measurements - MidAmerican Funding - Debt (Details) - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, carrying value	$ 49,461	$ 49,866
Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, fair value	55,926	60,633
MidAmerican Funding, LLC and Subsidiaries [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, carrying value	7,464	7,450
Long-term debt, fair value		$ 9,466
MidAmerican Funding, LLC and Subsidiaries [Member] \| Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, fair value	$ 8,622

XML 157 R116.htm IDEA: XBRL DOCUMENT

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

Mar. 31, 2021

Dec. 31, 2020

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]

$ 8,897

$ 9,918

Level 1 [Member]

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

6,449

7,562

Level 2 [Member]

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

2,265

2,180

Level 3 [Member]

Commodity derivative [Member] | Level 1 [Member]

201

197

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

(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

(90)

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

154

135

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

(30)

(19)

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

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

136

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

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

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]

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]

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

(21)

(11)

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

$ (21)

$ (11)

[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 158 R117.htm IDEA: XBRL DOCUMENT

Fair Value Measurements - NPC - Level 3 (Details) - Nevada Power Company [Member] - Commodity [Member] - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Fair Value, Assets (Liabilities), Net, Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance	$ 15	$ (8)
Fair Value, Measurements with Unobservable Inputs Reconciliation, Recurring Basis, Gain (Loss) Included In Regulatory Assets and Liabilities, Net	(11)	31
Fair Value, Measurements With Unobservable Inputs Reconciliation, Recurring Basis, Assets and Liability, Net, Settlements	(1)	(1)
Ending balance	$ 27	$ (38)

XML 159 R118.htm IDEA: XBRL DOCUMENT

Fair Value Measurements - NPC - Debt (Details) - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, carrying value	$ 49,461	$ 49,866
Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, fair value	55,926	60,633
Nevada Power Company [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, carrying value	2,497	2,496
Nevada Power Company [Member] \| Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, fair value	$ 2,991	$ 3,245

XML 160 R119.htm IDEA: XBRL DOCUMENT

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

Mar. 31, 2021

Dec. 31, 2020

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]

$ 8,897

$ 9,918

Level 1 [Member]

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

6,449

7,562

Level 2 [Member]

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

2,265

2,180

Level 3 [Member]

Commodity derivative [Member] | Level 1 [Member]

201

197

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

(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

(90)

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

154

135

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

(30)

(19)

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

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

^[1]

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

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

^[1]

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

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

^[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 1 [Member]

^[2]

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]

^[2]

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]

^[2]

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

Sierra Pacific Power Company [Member] | Commodity derivative [Member]

^[2]

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

(4)

(2)

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

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

$ (4)

$ (2)

[1]	Amounts are included in cash and cash equivalents on the Consolidated Balance Sheets. The fair value of these money market mutual funds approximates cost.
[2]	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 161 R120.htm IDEA: XBRL DOCUMENT

Fair Value Measurements - SPPC - Debt (Details) - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, carrying value	$ 49,461	$ 49,866
Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, fair value	55,926	60,633
Sierra Pacific Power Company [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, carrying value	1,164	1,164
Sierra Pacific Power Company [Member] \| Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, fair value	$ 1,312	$ 1,358

XML 162 R121.htm IDEA: XBRL DOCUMENT

Fair Value Measurements - EEGH - Fair Value Hierarchy (Details) - USD ($)
$ in Millions

Mar. 31, 2021

Dec. 31, 2020

Recurring [Member]

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

$ 8,897

$ 9,918

Recurring [Member] | Eastern Energy Gas Holdings, LLC [Member]

(105)

(121)

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

Recurring [Member] | Level 1 [Member]

(4)

(9)

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

6,449

7,562

Recurring [Member] | Level 1 [Member] | Eastern Energy Gas Holdings, LLC [Member]

(3)

(6)

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

Recurring [Member] | Level 2 [Member]

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

2,265

2,180

Recurring [Member] | Level 2 [Member] | Eastern Energy Gas Holdings, LLC [Member]

(105)

(152)

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

Recurring [Member] | Level 3 [Member]

(4)

(9)

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

201

197

Recurring [Member] | Level 3 [Member] | Eastern Energy Gas Holdings, LLC [Member]

(36)

(19)

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

Money market mutual funds [Member] | Recurring [Member]

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

Money market mutual funds [Member] | Recurring [Member] | Eastern Energy Gas Holdings, LLC [Member]

^[1]

807

873

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

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

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

Money market mutual funds [Member] | Recurring [Member] | Level 1 [Member] | Eastern Energy Gas Holdings, LLC [Member]

^[1]

807

873

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

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

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

Money market mutual funds [Member] | Recurring [Member] | Level 2 [Member] | Eastern Energy Gas Holdings, LLC [Member]

^[1]

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

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

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

Money market mutual funds [Member] | Recurring [Member] | Level 3 [Member] | Eastern Energy Gas Holdings, LLC [Member]

^[1]

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

Investment funds [Member] | Eastern Energy Gas Holdings, LLC [Member]

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

Investment funds [Member] | Recurring [Member]

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

Investment funds [Member] | Recurring [Member] | Eastern Energy Gas Holdings, LLC [Member]

256

201

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

Investment funds [Member] | Recurring [Member] | Level 1 [Member]

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

Investment funds [Member] | Recurring [Member] | Level 1 [Member] | Eastern Energy Gas Holdings, LLC [Member]

256

201

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

Investment funds [Member] | Recurring [Member] | Level 2 [Member]

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

Investment funds [Member] | Recurring [Member] | Level 2 [Member] | Eastern Energy Gas Holdings, LLC [Member]

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

Investment funds [Member] | Recurring [Member] | Level 3 [Member]

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

Investment funds [Member] | Recurring [Member] | Level 3 [Member] | Eastern Energy Gas Holdings, LLC [Member]

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

Commodity Derivatives [Member] | Recurring [Member]

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

209

188

Commodity Derivatives [Member] | Recurring [Member] | Eastern Energy Gas Holdings, LLC [Member]

(81)

(54)

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

Commodity Derivatives [Member] | Recurring [Member] | Level 1 [Member] | Eastern Energy Gas Holdings, LLC [Member]

(1)

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

Commodity Derivatives [Member] | Recurring [Member] | Level 2 [Member] | Eastern Energy Gas Holdings, LLC [Member]

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

Commodity Derivatives [Member] | Recurring [Member] | Level 3 [Member] | Eastern Energy Gas Holdings, LLC [Member]

(1)

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

Foreign Currency Exchange Rate Derivatives [Member] | Recurring [Member]

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

Foreign Currency Exchange Rate Derivatives [Member] | Recurring [Member] | Eastern Energy Gas Holdings, LLC [Member]

(1)

(2)

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

Foreign Currency Exchange Rate Derivatives [Member] | Recurring [Member] | Level 1 [Member] | Eastern Energy Gas Holdings, LLC [Member]

(1)

(2)

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

Foreign Currency Exchange Rate Derivatives [Member] | Recurring [Member] | Level 2 [Member] | Eastern Energy Gas Holdings, LLC [Member]

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

Foreign Currency Exchange Rate Derivatives [Member] | Recurring [Member] | Level 3 [Member] | Eastern Energy Gas Holdings, LLC [Member]

(1)

(2)

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

Interest Rate Derivatives [Member] | Recurring [Member]

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

Interest Rate Derivatives [Member] | Recurring [Member] | Eastern Energy Gas Holdings, LLC [Member]

(23)

(65)

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

Interest Rate Derivatives [Member] | Recurring [Member] | Level 1 [Member] | Eastern Energy Gas Holdings, LLC [Member]

(3)

(6)

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

Interest Rate Derivatives [Member] | Recurring [Member] | Level 2 [Member] | Eastern Energy Gas Holdings, LLC [Member]

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

Interest Rate Derivatives [Member] | Recurring [Member] | Level 3 [Member] | Eastern Energy Gas Holdings, LLC [Member]

(3)

(6)

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

$ 0

[1]	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.

XML 163 R122.htm IDEA: XBRL DOCUMENT

Fair Value Measurements - EEGH - Debt (Details) - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, carrying value	$ 49,461	$ 49,866
Eastern Energy Gas Holdings, LLC [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, carrying value	4,414	4,425
Long-term debt, fair value	$ 4,744	$ 5,012

XML 164 R123.htm IDEA: XBRL DOCUMENT

Commitments and Contingencies - Commitments (Details) - PacifiCorp [Member] - Klamath Hydroelectric System [Member] $ in Millions	3 Months Ended
	Mar. 31, 2021 USD ($)
ContractualObligationFiscalYearMaturityScheduleTable [Line Items]
Dam removal cost limit	$ 200
Additional dam removal costs, California bond measure	250
Hydroelectric Dam Removal Cost, Additional Contingency Funding	45
Hydroelectric Dam Removal Cost, Total Funding	$ 450

XML 165 R124.htm IDEA: XBRL DOCUMENT

Commitments and Contingencies - Legal Matters (Details) - 2020 Wildfires - PacifiCorp [Member] a in Millions, $ in Millions	1 Months Ended	7 Months Ended
	Sep. 30, 2020 a naturalGasProducer	Mar. 31, 2021 USD ($)
Loss Contingencies [Line Items]
Number of Acres Burned \| a	0.5
Number of Structures Destroyed \| naturalGasProducer	2,000
Fire Suppression Costs		$ 150
Loss Contingency, Estimate of Possible Loss		$ 136

XML 166 R125.htm IDEA: XBRL DOCUMENT

Commitments and Contingencies Commitments and Contingencies - PacifiCorp - Legal Matters (Details) - PacifiCorp [Member] - 2020 Wildfires a in Millions, $ in Millions	1 Months Ended	7 Months Ended
	Sep. 30, 2020 a naturalGasProducer	Mar. 31, 2021 USD ($)
Loss Contingencies [Line Items]
Number of Acres Burned \| a	0.5
Number of Structures Destroyed \| naturalGasProducer	2,000
Loss Contingency, Estimate of Possible Loss		$ 136
Fire Suppression Costs		$ 150

XML 167 R126.htm IDEA: XBRL DOCUMENT

Commitments and Contingencies Commitments and Contingencies - PacifiCorp - Hydroelectric (Details) - Klamath Hydroelectric System [Member] - PacifiCorp [Member] $ in Millions	3 Months Ended
	Mar. 31, 2021 USD ($)
Hydroelectric [Line Items]
Dam removal cost limit	$ 200
Additional dam removal costs, California bond measure	250
Hydroelectric Dam Removal Cost, Additional Contingency Funding	45
Hydroelectric Dam Removal Cost, Total Funding	$ 450

XML 168 R127.htm IDEA: XBRL DOCUMENT

Commitments and Contingencies Commitments and Contingencies - MEC - Transmission Rates (Details) - MidAmerican Energy Company [Member] - Electric Transmission [Member] $ in Millions	3 Months Ended
	Mar. 31, 2021 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%
Nov 2019 Order For Nov 2013 to Feb 2015 and Sept 2016 Forward [Member]
Loss Contingencies [Line Items]
Public Utilities, Approved Return on Equity, Percentage	9.88%
Public Utilities, Approved Return on Equity Plus Adder, Percentage	10.38%
May 2020 Order For Nov 2013 to Feb 2015 and Sept 2016 Forward [Member]
Loss Contingencies [Line Items]
Public Utilities, Approved Return on Equity, Percentage	10.02%
Public Utilities, Approved Return on Equity Plus Adder, Percentage	10.52%

XML 169 R128.htm IDEA: XBRL DOCUMENT

Revenue from Contracts with Customers (Details) - USD ($)
$ in Millions

3 Months Ended

Mar. 31, 2021

Mar. 31, 2020

$ 4,712

$ 3,516

Non-contracts with customer revenue [Member]

6,081

4,527

Electricity and natural gas [Member]

137

118

4,849

3,634

1,229

1,170

PacifiCorp [Member] | Non-contracts with customer revenue [Member]

1,242

1,206

NV Energy, Inc. [Member]

585

615

NV Energy, Inc. [Member] | Non-contracts with customer revenue [Member]

591

622

Northern Powergrid Holdings [Member]

273

240

Northern Powergrid Holdings [Member] | Non-contracts with customer revenue [Member]

300

266

BHE Pipeline Group [Member]

1,071

400

BHE Pipeline Group [Member] | Non-contracts with customer revenue [Member]

1,093

401

BHE Transmission [Member]

180

172

BHE Transmission [Member] | Non-contracts with customer revenue [Member]

180

172

BHE Renewables [Member]

166

159

BHE Renewables [Member] | Non-contracts with customer revenue [Member]

190

178

Berkshire Hathaway Energy And Other [Member]

^[1]

146

Berkshire Hathaway Energy And Other [Member] | Non-contracts with customer revenue [Member]

^[1],[2]

186

103

MidAmerican Funding [Member]

^[1]

1,062

682

MidAmerican Funding [Member] | Non-contracts with customer revenue [Member]

1,067

686

Regulated Operation [Member]

Regulated Operation [Member] | Regulated retail electric [Member]

4,094

3,213

Regulated Operation [Member] | Regulated retail gas [Member]

2,108

2,061

Regulated Operation [Member] | Regulated wholesale [Member]

498

234

Regulated Operation [Member] | Regulated transmission and distribution [Member]

193

Regulated Operation [Member] | Regulated interstate pipeline [Member]

496

462

Regulated Operation [Member] | Other customer revenue [Member]

774

352

Regulated Operation [Member] | PacifiCorp [Member]

Regulated Operation [Member] | PacifiCorp [Member] | Regulated retail electric [Member]

1,229

1,170

Regulated Operation [Member] | PacifiCorp [Member] | Regulated retail gas [Member]

1,145

1,122

Regulated Operation [Member] | PacifiCorp [Member] | Regulated wholesale [Member]

Regulated Operation [Member] | PacifiCorp [Member] | Regulated transmission and distribution [Member]

Regulated Operation [Member] | PacifiCorp [Member] | Regulated interstate pipeline [Member]

Regulated Operation [Member] | PacifiCorp [Member] | Other customer revenue [Member]

Regulated Operation [Member] | NV Energy, Inc. [Member]

Regulated Operation [Member] | NV Energy, Inc. [Member] | Regulated retail electric [Member]

585

614

Regulated Operation [Member] | NV Energy, Inc. [Member] | Regulated retail gas [Member]

511

529

Regulated Operation [Member] | NV Energy, Inc. [Member] | Regulated wholesale [Member]

Regulated Operation [Member] | NV Energy, Inc. [Member] | Regulated transmission and distribution [Member]

Regulated Operation [Member] | NV Energy, Inc. [Member] | Regulated interstate pipeline [Member]

Regulated Operation [Member] | NV Energy, Inc. [Member] | Other customer revenue [Member]

Regulated Operation [Member] | Northern Powergrid Holdings [Member]

Regulated Operation [Member] | Northern Powergrid Holdings [Member] | Regulated retail electric [Member]

263

233

Regulated Operation [Member] | Northern Powergrid Holdings [Member] | Regulated retail gas [Member]

Regulated Operation [Member] | Northern Powergrid Holdings [Member] | Regulated wholesale [Member]

Regulated Operation [Member] | Northern Powergrid Holdings [Member] | Regulated transmission and distribution [Member]

Regulated Operation [Member] | Northern Powergrid Holdings [Member] | Regulated interstate pipeline [Member]

263

233

Regulated Operation [Member] | Northern Powergrid Holdings [Member] | Other customer revenue [Member]

Regulated Operation [Member] | BHE Pipeline Group [Member]

Regulated Operation [Member] | BHE Pipeline Group [Member] | Regulated retail electric [Member]

834

400

Regulated Operation [Member] | BHE Pipeline Group [Member] | Regulated retail gas [Member]

Regulated Operation [Member] | BHE Pipeline Group [Member] | Regulated wholesale [Member]

Regulated Operation [Member] | BHE Pipeline Group [Member] | Regulated transmission and distribution [Member]

Regulated Operation [Member] | BHE Pipeline Group [Member] | Regulated interstate pipeline [Member]

Regulated Operation [Member] | BHE Pipeline Group [Member] | Other customer revenue [Member]

815

400

Regulated Operation [Member] | BHE Transmission [Member]

Regulated Operation [Member] | BHE Transmission [Member] | Regulated retail electric [Member]

172

169

Regulated Operation [Member] | BHE Transmission [Member] | Regulated retail gas [Member]

Regulated Operation [Member] | BHE Transmission [Member] | Regulated wholesale [Member]

Regulated Operation [Member] | BHE Transmission [Member] | Regulated transmission and distribution [Member]

Regulated Operation [Member] | BHE Transmission [Member] | Regulated interstate pipeline [Member]

172

169

Regulated Operation [Member] | BHE Transmission [Member] | Other customer revenue [Member]

Regulated Operation [Member] | BHE Renewables [Member]

Regulated Operation [Member] | BHE Renewables [Member] | Regulated retail electric [Member]

Regulated Operation [Member] | BHE Renewables [Member] | Regulated retail gas [Member]

Regulated Operation [Member] | BHE Renewables [Member] | Regulated wholesale [Member]

Regulated Operation [Member] | BHE Renewables [Member] | Regulated transmission and distribution [Member]

Regulated Operation [Member] | BHE Renewables [Member] | Regulated interstate pipeline [Member]

Regulated Operation [Member] | BHE Renewables [Member] | Other customer revenue [Member]

Regulated Operation [Member] | Berkshire Hathaway Energy And Other [Member]

Regulated Operation [Member] | Berkshire Hathaway Energy And Other [Member] | Regulated retail electric [Member]

^[1]

(41)

(49)

Regulated Operation [Member] | Berkshire Hathaway Energy And Other [Member] | Regulated retail gas [Member]

^[1]

Regulated Operation [Member] | Berkshire Hathaway Energy And Other [Member] | Regulated wholesale [Member]

^[1]

Regulated Operation [Member] | Berkshire Hathaway Energy And Other [Member] | Regulated transmission and distribution [Member]

^[1]

(1)

Regulated Operation [Member] | Berkshire Hathaway Energy And Other [Member] | Regulated interstate pipeline [Member]

^[1]

Regulated Operation [Member] | Berkshire Hathaway Energy And Other [Member] | Other customer revenue [Member]

^[1]

(41)

(48)

Regulated Operation [Member] | MidAmerican Funding [Member]

^[1]

Regulated Operation [Member] | MidAmerican Funding [Member] | Regulated retail electric [Member]

1,052

676

Regulated Operation [Member] | MidAmerican Funding [Member] | Regulated retail gas [Member]

452

410

Regulated Operation [Member] | MidAmerican Funding [Member] | Regulated wholesale [Member]

460

187

Regulated Operation [Member] | MidAmerican Funding [Member] | Regulated transmission and distribution [Member]

125

Regulated Operation [Member] | MidAmerican Funding [Member] | Regulated interstate pipeline [Member]

Regulated Operation [Member] | MidAmerican Funding [Member] | Other customer revenue [Member]

Unregulated Operation [Member] | Nonregulated products and services [Member]

Unregulated Operation [Member] | PacifiCorp [Member] | Nonregulated products and services [Member]

618

303

Unregulated Operation [Member] | NV Energy, Inc. [Member] | Nonregulated products and services [Member]

Unregulated Operation [Member] | Northern Powergrid Holdings [Member] | Nonregulated products and services [Member]

Unregulated Operation [Member] | BHE Pipeline Group [Member] | Nonregulated products and services [Member]

Unregulated Operation [Member] | BHE Transmission [Member] | Nonregulated products and services [Member]

237

Unregulated Operation [Member] | BHE Renewables [Member] | Nonregulated products and services [Member]

Unregulated Operation [Member] | Berkshire Hathaway Energy And Other [Member] | Nonregulated products and services [Member]

166

159

Unregulated Operation [Member] | MidAmerican Funding [Member] | Nonregulated products and services [Member]

^[1]

187

127

$ 10

$ 6

[1]	The BHE and Other reportable segment represents amounts related principally to other entities, corporate functions and intersegment eliminations.
[2]	The differences between the reportable segment amounts and the consolidated amounts, described as BHE and Other, relate principally to other entities, including MidAmerican Energy Services, LLC, corporate functions and intersegment eliminations.

XML 170 R129.htm IDEA: XBRL DOCUMENT

Revenue from Contracts with Customers - Real Estate Services (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Disaggregation of Revenue [Line Items]
Total Customer Revenue	$ 4,712	$ 3,516
Operating revenue	6,081	4,527
Residential real estate brokerage and mortgage businesses [Member]
Disaggregation of Revenue [Line Items]
Operating revenue	1,232	893
Non-contracts with customer revenue [Member]
Disaggregation of Revenue [Line Items]
Operating revenue	137	118
HomeServices [Member]
Disaggregation of Revenue [Line Items]
Operating revenue	1,232	893
HomeServices [Member] \| Residential real estate brokerage [Member]
Disaggregation of Revenue [Line Items]
Total Customer Revenue	1,022	777
HomeServices [Member] \| Real estate franchise [Member]
Disaggregation of Revenue [Line Items]
Total Customer Revenue	18	16
HomeServices [Member] \| Residential real estate brokerage and mortgage businesses [Member]
Disaggregation of Revenue [Line Items]
Total Customer Revenue	1,040	793
Operating revenue	1,232	893
HomeServices [Member] \| Non-contracts with customer revenue [Member]
Disaggregation of Revenue [Line Items]
Operating revenue	$ 192	$ 100

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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XML 171 R130.htm IDEA: XBRL DOCUMENT

Revenue from Contracts with Customers - Remaining Performance Obligation (Details) $ in Millions	Mar. 31, 2021 USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	$ 23,952
Eastern Energy Gas Holdings, LLC [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	17,679
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-04-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	$ 3,034
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	12 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-04-01 \| Eastern Energy Gas Holdings, LLC [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	$ 1,564
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	12 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-04-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	$ 20,918
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-04-01 \| Eastern Energy Gas Holdings, LLC [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	$ 16,115
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period
BHE Pipeline Group [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	$ 23,439
BHE Pipeline Group [Member] \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-04-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	$ 2,521
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	12 months
BHE Pipeline Group [Member] \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-04-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	$ 20,918
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period
BHE Transmission [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	$ 513
BHE Transmission [Member] \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-04-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	$ 513
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	12 months
BHE Transmission [Member] \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-04-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	$ 0
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period

XML 172 R131.htm IDEA: XBRL DOCUMENT

Revenue from Contracts with Customers - Remaining Performance Obligation Total (Details) $ in Millions	Mar. 31, 2021 USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	$ 23,952
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-04-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	3,034
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-04-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	20,918
BHE Pipeline Group [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	23,439
BHE Pipeline Group [Member] \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-04-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	2,521
BHE Pipeline Group [Member] \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-04-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	20,918
BHE Transmission [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	513
BHE Transmission [Member] \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-04-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	513
BHE Transmission [Member] \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-04-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	$ 0

XML 173 R132.htm IDEA: XBRL DOCUMENT

Revenue from Contracts with Customers - PAC - Customer Revenue (Details) - USD ($)
$ in Millions

3 Months Ended

Mar. 31, 2021

Mar. 31, 2020

$ 4,712

$ 3,516

Non-contracts with customer revenue [Member]

6,081

4,527

Regulated Operation [Member]

137

118

Regulated Operation [Member] | Regulated retail electric [Member]

4,094

3,213

Regulated Operation [Member] | Regulated wholesale [Member]

2,108

2,061

Regulated Operation [Member] | Regulated transmission and distribution [Member]

193

Regulated Operation [Member] | Other customer revenue [Member]

496

462

PacifiCorp [Member] | Non-contracts with customer revenue [Member]

1,242

1,206

PacifiCorp [Member] | Regulated Operation [Member]

PacifiCorp [Member] | Regulated Operation [Member] | Regulated retail electric [Member]

1,229

1,170

PacifiCorp [Member] | Regulated Operation [Member] | Regulated wholesale [Member]

1,145

1,122

PacifiCorp [Member] | Regulated Operation [Member] | Regulated transmission and distribution [Member]

^[1]

PacifiCorp [Member] | Regulated Operation [Member] | Other customer revenue [Member]

PacifiCorp [Member] | Regulated Operation [Member] | Residential [Member] | Regulated retail electric [Member]

PacifiCorp [Member] | Regulated Operation [Member] | Commercial [Member] | Regulated retail electric [Member]

483

460

PacifiCorp [Member] | Regulated Operation [Member] | Industrial [Member] | Regulated retail electric [Member]

359

358

PacifiCorp [Member] | Regulated Operation [Member] | Other [Member] | Regulated retail electric [Member]

271

277

$ 32

$ 27

[1]	Includes net payments to counterparties for the financial settlement of certain non-derivative forward contracts for energy sales

XML 174 R133.htm IDEA: XBRL DOCUMENT

Revenue from Contracts with Customers - MEC (Details) - USD ($)
$ in Millions

3 Months Ended

Mar. 31, 2021

Mar. 31, 2020

$ 4,712

$ 3,516

Non-contracts with customer revenue [Member]

6,081

4,527

137

118

1,062

677

MidAmerican Energy Company [Member] | Non-contracts with customer revenue [Member]

1,067

681

Regulated Operation [Member]

Regulated Operation [Member] | Regulated retail electric [Member]

4,094

3,213

Regulated Operation [Member] | Regulated retail gas [Member]

2,108

2,061

Regulated Operation [Member] | Regulated wholesale [Member]

498

234

Regulated Operation [Member] | Other customer revenue [Member]

193

Regulated Operation [Member] | MidAmerican Energy Company [Member] | Regulated retail [Member]

Regulated Operation [Member] | MidAmerican Energy Company [Member] | Regulated retail [Member] | Residential [Member]

912

596

Regulated Operation [Member] | MidAmerican Energy Company [Member] | Regulated retail [Member] | Commercial [Member]

469

276

Regulated Operation [Member] | MidAmerican Energy Company [Member] | Regulated retail [Member] | Industrial [Member]

200

113

Regulated Operation [Member] | MidAmerican Energy Company [Member] | Regulated retail [Member] | Natural gas distribution, transportation-only services [Member]

202

167

Regulated Operation [Member] | MidAmerican Energy Company [Member] | Regulated retail [Member] | Other [Member]

Regulated Operation [Member] | MidAmerican Energy Company [Member] | Regulated wholesale [Member]

^[1]

Regulated Operation [Member] | MidAmerican Energy Company [Member] | Electricity Transmission [Member] | Multi value transmission projects [Member]

125

Unregulated Operation [Member] | MidAmerican Energy Company [Member] | Other customer revenue [Member]

Electricity Us Regulated Member | MidAmerican Energy Company [Member]

Electricity Us Regulated Member | Regulated Operation [Member] | MidAmerican Energy Company [Member]

545

471

541

468

Electricity Us Regulated Member | Regulated Operation [Member] | MidAmerican Energy Company [Member] | Regulated retail electric [Member]

545

471

Electricity Us Regulated Member | Regulated Operation [Member] | MidAmerican Energy Company [Member] | Regulated retail electric [Member] | Residential [Member]

452

410

Electricity Us Regulated Member | Regulated Operation [Member] | MidAmerican Energy Company [Member] | Regulated retail electric [Member] | Commercial [Member]

161

148

Electricity Us Regulated Member | Regulated Operation [Member] | MidAmerican Energy Company [Member] | Regulated retail electric [Member] | Industrial [Member]

Electricity Us Regulated Member | Regulated Operation [Member] | MidAmerican Energy Company [Member] | Regulated retail electric [Member] | Other [Member]

190

163

Electricity Us Regulated Member | Regulated Operation [Member] | MidAmerican Energy Company [Member] | Regulated wholesale [Member]

^[1]

Electricity Us Regulated Member | Regulated Operation [Member] | MidAmerican Energy Company [Member] | Electricity Transmission [Member] | Multi value transmission projects [Member]

Electricity Us Regulated Member | Regulated Operation [Member] | MidAmerican Energy Company [Member] | Non-contracts with customer revenue [Member]

Natural Gas US Regulated Member | MidAmerican Energy Company [Member]

Natural Gas US Regulated Member | Regulated Operation [Member] | MidAmerican Energy Company [Member]

512

209

511

208

Natural Gas US Regulated Member | Regulated Operation [Member] | MidAmerican Energy Company [Member] | Regulated retail gas [Member]

512

209

Natural Gas US Regulated Member | Regulated Operation [Member] | MidAmerican Energy Company [Member] | Regulated retail gas [Member] | Residential [Member]

460

186

Natural Gas US Regulated Member | Regulated Operation [Member] | MidAmerican Energy Company [Member] | Regulated retail gas [Member] | Commercial [Member]

308

128

Natural Gas US Regulated Member | Regulated Operation [Member] | MidAmerican Energy Company [Member] | Regulated retail gas [Member] | Industrial [Member]

129

Natural Gas US Regulated Member | Regulated Operation [Member] | MidAmerican Energy Company [Member] | Regulated retail gas [Member] | Natural gas distribution, transportation-only services [Member]

Natural Gas US Regulated Member | Regulated Operation [Member] | MidAmerican Energy Company [Member] | Regulated retail gas [Member] | Other [Member]

Natural Gas US Regulated Member | Regulated Operation [Member] | MidAmerican Energy Company [Member] | Regulated wholesale [Member]

^[1]

Natural Gas US Regulated Member | Regulated Operation [Member] | MidAmerican Energy Company [Member] | Non-contracts with customer revenue [Member]

Corporate and Other [Member] | MidAmerican Energy Company [Member]

Corporate and Other [Member] | Unregulated Operation [Member] | MidAmerican Energy Company [Member]

Corporate and Other [Member] | Unregulated Operation [Member] | MidAmerican Energy Company [Member] | Other customer revenue [Member]

Corporate and Other [Member] | Unregulated Operation [Member] | MidAmerican Energy Company [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 175 R134.htm IDEA: XBRL DOCUMENT

Revenue from Contracts with Customers - LLC - Customer Revenue (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Disaggregation of Revenue [Line Items]
Total Customer Revenue	$ 4,712	$ 3,516
Unregulated Operation [Member] \| Nonregulated products and services [Member]
Disaggregation of Revenue [Line Items]
Total Customer Revenue	618	303
Corporate and Other [Member] \| MidAmerican Funding, LLC and Subsidiaries [Member] \| Unregulated Operation [Member] \| Nonregulated products and services [Member]
Disaggregation of Revenue [Line Items]
Total Customer Revenue	$ 0	$ 5

XML 176 R135.htm IDEA: XBRL DOCUMENT

Revenue from Contracts with Customers - NPC - Customer Revenue (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Disaggregation of Revenue [Line Items]
Total Customer Revenue	$ 4,712	$ 3,516
Operating revenue	6,081	4,527
Non-contracts with customer revenue [Member]
Disaggregation of Revenue [Line Items]
Operating revenue	137	118
Regulated Operation [Member]
Disaggregation of Revenue [Line Items]
Total Customer Revenue	4,094	3,213
Regulated Operation [Member] \| Regulated retail electric [Member]
Disaggregation of Revenue [Line Items]
Total Customer Revenue	2,108	2,061
Nevada Power Company [Member]
Disaggregation of Revenue [Line Items]
Operating revenue	370	389
Nevada Power Company [Member] \| Non-contracts with customer revenue [Member]
Disaggregation of Revenue [Line Items]
Operating revenue	5	6
Nevada Power Company [Member] \| Regulated Operation [Member]
Disaggregation of Revenue [Line Items]
Total Customer Revenue	365	383
Nevada Power Company [Member] \| Regulated Operation [Member] \| Regulated retail electric [Member]
Disaggregation of Revenue [Line Items]
Total Customer Revenue	351	367
Nevada Power Company [Member] \| Regulated Operation [Member] \| Regulated wholesale, transmission and other [Member]
Disaggregation of Revenue [Line Items]
Total Customer Revenue	14	16
Nevada Power Company [Member] \| Fully bundled customer [Member] \| Regulated Operation [Member] \| Regulated retail electric [Member]
Disaggregation of Revenue [Line Items]
Total Customer Revenue	346	360
Nevada Power Company [Member] \| Fully bundled customer [Member] \| Regulated Operation [Member] \| Regulated retail electric [Member] \| Residential [Member]
Disaggregation of Revenue [Line Items]
Total Customer Revenue	196	193
Nevada Power Company [Member] \| Fully bundled customer [Member] \| Regulated Operation [Member] \| Regulated retail electric [Member] \| Commercial [Member]
Disaggregation of Revenue [Line Items]
Total Customer Revenue	84	94
Nevada Power Company [Member] \| Fully bundled customer [Member] \| Regulated Operation [Member] \| Regulated retail electric [Member] \| Industrial [Member]
Disaggregation of Revenue [Line Items]
Total Customer Revenue	63	70
Nevada Power Company [Member] \| Fully bundled customer [Member] \| Regulated Operation [Member] \| Regulated retail electric [Member] \| Other [Member]
Disaggregation of Revenue [Line Items]
Total Customer Revenue	3	3
Nevada Power Company [Member] \| Distribution only service [Member] \| Regulated Operation [Member] \| Regulated retail electric [Member]
Disaggregation of Revenue [Line Items]
Total Customer Revenue	$ 5	$ 7

XML 177 R136.htm IDEA: XBRL DOCUMENT

Revenue from Contracts with Customers - SPPC - Customer Revenue (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Disaggregation of Revenue [Line Items]
Total Customer Revenue	$ 4,712	$ 3,516
Operating revenue	6,081	4,527
Non-contracts with customer revenue [Member]
Disaggregation of Revenue [Line Items]
Operating revenue	137	118
Regulated Operation [Member]
Disaggregation of Revenue [Line Items]
Total Customer Revenue	4,094	3,213
Regulated Operation [Member] \| Regulated retail electric [Member]
Disaggregation of Revenue [Line Items]
Total Customer Revenue	2,108	2,061
Regulated Operation [Member] \| Regulated retail gas [Member]
Disaggregation of Revenue [Line Items]
Total Customer Revenue	498	234
Sierra Pacific Power Company [Member]
Disaggregation of Revenue [Line Items]
Operating revenue	220	232
Sierra Pacific Power Company [Member] \| Non-contracts with customer revenue [Member]
Disaggregation of Revenue [Line Items]
Operating revenue	1	2
Sierra Pacific Power Company [Member] \| Regulated Electric [Member]
Disaggregation of Revenue [Line Items]
Operating revenue	181	184
Sierra Pacific Power Company [Member] \| Regulated Electric [Member] \| Non-contracts with customer revenue [Member]
Disaggregation of Revenue [Line Items]
Operating revenue	0	1
Sierra Pacific Power Company [Member] \| Regulated Gas [Member]
Disaggregation of Revenue [Line Items]
Operating revenue	39	48
Sierra Pacific Power Company [Member] \| Regulated Gas [Member] \| Non-contracts with customer revenue [Member]
Disaggregation of Revenue [Line Items]
Operating revenue	1	1
Sierra Pacific Power Company [Member] \| Regulated Operation [Member]
Disaggregation of Revenue [Line Items]
Total Customer Revenue	219	230
Sierra Pacific Power Company [Member] \| Regulated Operation [Member] \| Regulated wholesale, transmission and other [Member]
Disaggregation of Revenue [Line Items]
Total Customer Revenue	15	14
Sierra Pacific Power Company [Member] \| Regulated Operation [Member] \| Regulated Electric [Member]
Disaggregation of Revenue [Line Items]
Total Customer Revenue	181	183
Sierra Pacific Power Company [Member] \| Regulated Operation [Member] \| Regulated Electric [Member] \| Regulated wholesale, transmission and other [Member]
Disaggregation of Revenue [Line Items]
Total Customer Revenue	15	14
Sierra Pacific Power Company [Member] \| Regulated Operation [Member] \| Regulated Gas [Member]
Disaggregation of Revenue [Line Items]
Total Customer Revenue	38	47
Sierra Pacific Power Company [Member] \| Regulated Operation [Member] \| Regulated Gas [Member] \| Regulated wholesale, transmission and other [Member]
Disaggregation of Revenue [Line Items]
Total Customer Revenue	0	0
Sierra Pacific Power Company [Member] \| Regulated Operation [Member] \| Fully bundled customer [Member]
Disaggregation of Revenue [Line Items]
Total Customer Revenue	203	215
Sierra Pacific Power Company [Member] \| Regulated Operation [Member] \| Fully bundled customer [Member] \| Residential [Member]
Disaggregation of Revenue [Line Items]
Total Customer Revenue	96	99
Sierra Pacific Power Company [Member] \| Regulated Operation [Member] \| Fully bundled customer [Member] \| Commercial [Member]
Disaggregation of Revenue [Line Items]
Total Customer Revenue	64	70
Sierra Pacific Power Company [Member] \| Regulated Operation [Member] \| Fully bundled customer [Member] \| Industrial [Member]
Disaggregation of Revenue [Line Items]
Total Customer Revenue	42	45
Sierra Pacific Power Company [Member] \| Regulated Operation [Member] \| Fully bundled customer [Member] \| Other [Member]
Disaggregation of Revenue [Line Items]
Total Customer Revenue	1	1
Sierra Pacific Power Company [Member] \| Regulated Operation [Member] \| Fully bundled customer [Member] \| Regulated Electric [Member] \| Regulated retail electric [Member]
Disaggregation of Revenue [Line Items]
Total Customer Revenue	165	168
Sierra Pacific Power Company [Member] \| Regulated Operation [Member] \| Fully bundled customer [Member] \| Regulated Electric [Member] \| Regulated retail electric [Member] \| Residential [Member]
Disaggregation of Revenue [Line Items]
Total Customer Revenue	71	69
Sierra Pacific Power Company [Member] \| Regulated Operation [Member] \| Fully bundled customer [Member] \| Regulated Electric [Member] \| Regulated retail electric [Member] \| Commercial [Member]
Disaggregation of Revenue [Line Items]
Total Customer Revenue	54	57
Sierra Pacific Power Company [Member] \| Regulated Operation [Member] \| Fully bundled customer [Member] \| Regulated Electric [Member] \| Regulated retail electric [Member] \| Industrial [Member]
Disaggregation of Revenue [Line Items]
Total Customer Revenue	39	41
Sierra Pacific Power Company [Member] \| Regulated Operation [Member] \| Fully bundled customer [Member] \| Regulated Electric [Member] \| Regulated retail electric [Member] \| Other [Member]
Disaggregation of Revenue [Line Items]
Total Customer Revenue	1	1
Sierra Pacific Power Company [Member] \| Regulated Operation [Member] \| Fully bundled customer [Member] \| Regulated Gas [Member] \| Regulated retail gas [Member]
Disaggregation of Revenue [Line Items]
Total Customer Revenue	38	47
Sierra Pacific Power Company [Member] \| Regulated Operation [Member] \| Fully bundled customer [Member] \| Regulated Gas [Member] \| Regulated retail gas [Member] \| Residential [Member]
Disaggregation of Revenue [Line Items]
Total Customer Revenue	25	30
Sierra Pacific Power Company [Member] \| Regulated Operation [Member] \| Fully bundled customer [Member] \| Regulated Gas [Member] \| Regulated retail gas [Member] \| Commercial [Member]
Disaggregation of Revenue [Line Items]
Total Customer Revenue	10	13
Sierra Pacific Power Company [Member] \| Regulated Operation [Member] \| Fully bundled customer [Member] \| Regulated Gas [Member] \| Regulated retail gas [Member] \| Industrial [Member]
Disaggregation of Revenue [Line Items]
Total Customer Revenue	3	4
Sierra Pacific Power Company [Member] \| Regulated Operation [Member] \| Fully bundled customer [Member] \| Regulated Gas [Member] \| Regulated retail gas [Member] \| Other [Member]
Disaggregation of Revenue [Line Items]
Total Customer Revenue	0	0
Sierra Pacific Power Company [Member] \| Regulated Operation [Member] \| Distribution only service [Member]
Disaggregation of Revenue [Line Items]
Total Customer Revenue	1	1
Sierra Pacific Power Company [Member] \| Regulated Operation [Member] \| Distribution only service [Member] \| Regulated Electric [Member] \| Regulated retail electric [Member]
Disaggregation of Revenue [Line Items]
Total Customer Revenue	1	1
Sierra Pacific Power Company [Member] \| Regulated Operation [Member] \| Distribution only service [Member] \| Regulated Gas [Member] \| Regulated retail gas [Member]
Disaggregation of Revenue [Line Items]
Total Customer Revenue	0	0
Sierra Pacific Power Company [Member] \| Regulated Operation [Member] \| Fully bundled and distribution services only customer [Member]
Disaggregation of Revenue [Line Items]
Total Customer Revenue	204	216
Sierra Pacific Power Company [Member] \| Regulated Operation [Member] \| Fully bundled and distribution services only customer [Member] \| Regulated Electric [Member] \| Regulated retail electric [Member]
Disaggregation of Revenue [Line Items]
Total Customer Revenue	166	169
Sierra Pacific Power Company [Member] \| Regulated Operation [Member] \| Fully bundled and distribution services only customer [Member] \| Regulated Gas [Member] \| Regulated retail gas [Member]
Disaggregation of Revenue [Line Items]
Total Customer Revenue	$ 38	$ 47

XML 178 R137.htm IDEA: XBRL DOCUMENT

Revenue from Contracts with Customers - EEGH (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Revenue from External Customer [Line Items]
Total Customer Revenue	$ 4,712	$ 3,516
Operating revenue	6,081	4,527
Eastern Energy Gas Holdings, LLC [Member]
Revenue from External Customer [Line Items]
Total Customer Revenue	486	555
Operating revenue	486	556
Regulated Operation [Member]
Revenue from External Customer [Line Items]
Total Customer Revenue	4,094	3,213
Regulated Operation [Member] \| Eastern Energy Gas Holdings, LLC [Member]
Revenue from External Customer [Line Items]
Total Customer Revenue	296	347
Unregulated Operation [Member] \| Eastern Energy Gas Holdings, LLC [Member]
Revenue from External Customer [Line Items]
Total Customer Revenue	190	208
Regulated gas transportation and storage [Member] \| Regulated Operation [Member]
Revenue from External Customer [Line Items]
Total Customer Revenue	498	234
Regulated gas transportation and storage [Member] \| Regulated Operation [Member] \| Eastern Energy Gas Holdings, LLC [Member]
Revenue from External Customer [Line Items]
Total Customer Revenue	279	344
Regulated wholesale [Member] \| Regulated Operation [Member]
Revenue from External Customer [Line Items]
Total Customer Revenue	193	77
Regulated wholesale [Member] \| Regulated Operation [Member] \| Eastern Energy Gas Holdings, LLC [Member]
Revenue from External Customer [Line Items]
Total Customer Revenue	17	2
Regulated other [Member] \| Regulated Operation [Member]
Revenue from External Customer [Line Items]
Total Customer Revenue	25	27
Regulated other [Member] \| Regulated Operation [Member] \| Eastern Energy Gas Holdings, LLC [Member]
Revenue from External Customer [Line Items]
Total Customer Revenue	0	1
Non-contracts with customer revenue [Member]
Revenue from External Customer [Line Items]
Operating revenue	137	118
Non-contracts with customer revenue [Member] \| Eastern Energy Gas Holdings, LLC [Member]
Revenue from External Customer [Line Items]
Operating revenue	$ 0	$ 1

XML 179 R138.htm IDEA: XBRL DOCUMENT

Revenue from Contracts with Customers - EEGH - Remaining Performance Obligation (Details) $ in Millions	Mar. 31, 2021 USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Performance obligations expected to be satisfied	$ 23,952
Eastern Energy Gas Holdings, LLC [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Performance obligations expected to be satisfied	17,679
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-04-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Performance obligations expected to be satisfied	$ 3,034
Performance obligations expected to be satisfied, expected timing of satisfaction, period	12 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-04-01 \| Eastern Energy Gas Holdings, LLC [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Performance obligations expected to be satisfied	$ 1,564
Performance obligations expected to be satisfied, expected timing of satisfaction, period	12 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-04-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Performance obligations expected to be satisfied	$ 20,918
Performance obligations expected to be satisfied, expected timing of satisfaction, period
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-04-01 \| Eastern Energy Gas Holdings, LLC [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Performance obligations expected to be satisfied	$ 16,115
Performance obligations expected to be satisfied, expected timing of satisfaction, period

XML 180 R139.htm IDEA: XBRL DOCUMENT

BHE Shareholders' Equity (Details) $ in Millions	3 Months Ended
BHE Shareholders' Equity (Details) $ in Millions	Mar. 31, 2020 USD ($) shares
Class of Stock [Line Items]
Stock Repurchased During Period, Value	$ 126
Common Stock [Member]
Class of Stock [Line Items]
Stock Repurchased and Retired During Period, Shares \| shares	180,358
Stock Repurchased During Period, Value	$ 126

XML 181 R140.htm IDEA: XBRL DOCUMENT

Components of Accumulated Other Comprehensive Loss, Net (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance	$ 43,010
Other comprehensive income (loss)	112	$ (547)
Balance	43,089
Accumulated Other Comprehensive (Loss) Income, Net [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance	(1,552)	(1,706)
Other comprehensive income (loss)	112	(547)
Balance	(1,440)	(2,253)
Unrecognized Amounts On Retirement Benefits [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance	482	417
Other comprehensive income (loss)	(7)	(34)
Balance	475	383
Foreign Currency Translation Adjustment [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance	(1,062)	(1,296)
Other comprehensive income (loss)	91	(548)
Balance	(971)	(1,844)
Unrealized Gains (Losses) On Cash Flow Hedges [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance	(8)	7
Other comprehensive income (loss)	14	(33)
Balance	$ 6	$ (26)

Amount after tax and reclassification adjustments of other comprehensive income (loss).

XML 182 R141.htm IDEA: XBRL DOCUMENT

Components of Accumulated Other Comprehensive Loss, Net - EEGH (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance	$ 46,977	$ 32,578
Other comprehensive income (loss)	112	(547)
Balance	47,051	32,572
Eastern Energy Gas Holdings, LLC [Member]
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance	6,995	10,229
Other comprehensive income (loss)	12	(84)
Balance	7,078	10,078
Accumulated Other Comprehensive Loss [Member]
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Other comprehensive income (loss)	112	(547)
Accumulated Other Comprehensive Loss [Member] \| Eastern Energy Gas Holdings, LLC [Member]
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance	(53)	(187)
Other comprehensive income (loss)	8	(84)
Balance	(45)	(271)
Unrecognized Amounts On Retirement Benefits [Member]
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Other comprehensive income (loss)	(7)	(34)
Unrecognized Amounts On Retirement Benefits [Member] \| Eastern Energy Gas Holdings, LLC [Member]
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance	(12)	(106)
Other comprehensive income (loss)	2	1
Balance	(10)	(105)
Unrealized Gains (Losses) On Cash Flow Hedges [Member]
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Other comprehensive income (loss)	14	(33)
Unrealized Gains (Losses) On Cash Flow Hedges [Member] \| Eastern Energy Gas Holdings, LLC [Member]
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance	(51)	(81)
Other comprehensive income (loss)	10	(85)
Balance	(41)	(166)
AOCI Attributable to Noncontrolling Interest [Member] \| Eastern Energy Gas Holdings, LLC [Member]
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance	10	0
Other comprehensive income (loss)	(4)	0
Balance	$ 6	$ 0

Amount after tax and reclassification adjustments of other comprehensive income (loss).

XML 183 R142.htm IDEA: XBRL DOCUMENT

Segment Information (Details)
$ in Millions

3 Months Ended

Mar. 31, 2021

USD ($)

OperatingSegments

Mar. 31, 2020

USD ($)

Dec. 31, 2020

USD ($)

$ 6,081

$ 4,527

Depreciation and amortization

(915)

(809)

927

821

1,333

919

Interest Costs Capitalized

530

483

Interest and dividend income

(Losses) gains on marketable securities, net

(1,118)

(27)

(246)

507

Undistributed Earnings (Loss) Available to Common Shareholders, Diluted

670

(34)

670

Number of reportable segments | OperatingSegments

$ 127,522

$ 127,316

$ 1,242

1,206

(264)

(252)

234

107

102

169

176

MidAmerican Funding [Member]

26,956

26,862

1,067

686

(207)

(176)

102

144

150

24,098

23,530

NV Energy, Inc. [Member]

591

622

(136)

(124)

Northern Powergrid Holdings [Member]

14,594

14,501

300

266

(71)

(63)

151

132

104

BHE Pipeline Group [Member]

8,980

8,782

1,093

401

(118)

(64)

618

249

383

179

BHE Transmission [Member]

19,651

19,541

180

172

(58)

(60)

Berkshire Hathaway Energy Renewables [Member]

9,341

9,208

190

178

(60)

(71)

11,935

12,004

HomeServices [Member]

Depreciation and amortization

1,232

893

112

Berkshire Hathaway Energy And Other [Member]

5,186

4,955

^[1],[2]

186

103

^[2]

(2)

^[2]

(14)

^[2]

143

111

(1,027)

(102)

^[2]

6,781

$ 7,933

UNITED STATES

5,597

4,089

(423)

354

UNITED KINGDOM

300

266

132

109

CANADA

177

171

The Philippines and other [Member]

$ 6

$ 4

[1]	The BHE and Other reportable segment represents amounts related principally to other entities, corporate functions and intersegment eliminations.
[2]	The differences between the reportable segment amounts and the consolidated amounts, described as BHE and Other, relate principally to other entities, including MidAmerican Energy Services, LLC, corporate functions and intersegment eliminations.

XML 184 R143.htm IDEA: XBRL DOCUMENT

Segment Information - Goodwill (Details) $ in Millions	3 Months Ended
Segment Information - Goodwill (Details) $ in Millions	Mar. 31, 2021 USD ($)
Goodwill [Roll Forward]
Beginning balance	$ 11,506
Goodwill, Acquired During Period	1
Foreign currency translation	27
Ending balance	11,534
PacifiCorp [Member]
Goodwill [Roll Forward]
Beginning balance	1,129
Foreign currency translation	0
Ending balance	1,129
MidAmerican Funding [Member]
Goodwill [Roll Forward]
Beginning balance	2,102
Foreign currency translation	0
Ending balance	2,102
NV Energy, Inc. [Member]
Goodwill [Roll Forward]
Beginning balance	2,369
Foreign currency translation	0
Ending balance	2,369
Northern Powergrid Holdings [Member]
Goodwill [Roll Forward]
Beginning balance	1,000
Foreign currency translation	6
Ending balance	1,006
BHE Pipeline Group [Member]
Goodwill [Roll Forward]
Beginning balance	1,803
Foreign currency translation	0
Ending balance	1,803
BHE Transmission [Member]
Goodwill [Roll Forward]
Beginning balance	1,551
Foreign currency translation	21
Ending balance	1,572
Berkshire Hathaway Energy Renewables [Member]
Goodwill [Roll Forward]
Beginning balance	95
Foreign currency translation	0
Ending balance	95
HomeServices [Member]
Goodwill [Roll Forward]
Beginning balance	1,457
Goodwill, Acquired During Period	1
Foreign currency translation	0
Ending balance	$ 1,458

XML 185 R144.htm IDEA: XBRL DOCUMENT

Segment Information Segment Information - MEC (Details) $ in Millions	3 Months Ended
	Mar. 31, 2021 USD ($) OperatingSegments ReportableSegments	Mar. 31, 2020 USD ($)	Dec. 31, 2020 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments \| OperatingSegments	8
Operating revenue	$ 6,081	$ 4,527
Operating income	1,333	919
Interest expense	(530)	(483)
Allowance for borrowed funds	14	17
Allowance for equity funds	26	34
Other, net	8	(27)
Income before income tax (benefit) expense and equity income	(246)	507
Assets	$ 127,522		$ 127,316
MidAmerican Energy Company [Member]
Segment Reporting Information [Line Items]
Number of reportable segments \| ReportableSegments	2
Operating revenue	$ 1,067	681
Operating income	48	98
Interest expense	(74)	(76)
Allowance for borrowed funds	2	3
Allowance for equity funds	6	8
Other, net	11	(5)
Income before income tax (benefit) expense and equity income	(7)	28
Assets	22,000		21,437
MidAmerican Energy Company [Member] \| Electricity Us Regulated Member
Segment Reporting Information [Line Items]
Operating revenue	545	471
Operating income	9	59
Assets	20,272		19,892
MidAmerican Energy Company [Member] \| Natural Gas US Regulated Member
Segment Reporting Information [Line Items]
Operating revenue	512	209
Operating income	39	39
Assets	1,725		1,544
MidAmerican Energy Company [Member] \| Corporate and Other [Member]
Segment Reporting Information [Line Items]
Operating revenue	10	$ 1
Assets	$ 3		$ 1

XML 186 R145.htm IDEA: XBRL DOCUMENT

Segment Information Segment Information - MidAmerican Funding (Details)
$ in Millions

3 Months Ended

Mar. 31, 2021

USD ($)

ReportableSegments

OperatingSegments

Mar. 31, 2020

USD ($)

Dec. 31, 2020

USD ($)

Number of reportable segments | OperatingSegments

$ 6,081

$ 4,527

1,333

919

Allowance for borrowed funds

(530)

(483)

Income before income tax (benefit) expense and equity income

(27)

(246)

507

$ 127,522

$ 127,316

Number of reportable segments | ReportableSegments

$ 1,067

686

102

Allowance for borrowed funds

(78)

(81)

Income before income tax (benefit) expense and equity income

(6)

(12)

MidAmerican Funding, LLC and Subsidiaries [Member] | Electricity Us Regulated Member

^[1]

23,274

22,711

545

471

MidAmerican Funding, LLC and Subsidiaries [Member] | Natural Gas US Regulated Member

^[1]

21,463

21,083

512

209

MidAmerican Funding, LLC and Subsidiaries [Member] | Corporate and Other [Member]

^[1]

1,804

1,623

$ 4

^[1]

$ 7

$ 5

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

XML 187 R146.htm IDEA: XBRL DOCUMENT

Segment Information Segment Information - SPPC (Details)
$ in Millions

3 Months Ended

Mar. 31, 2021

USD ($)

OperatingSegments

TheNumberOfReportableSegments

Mar. 31, 2020

USD ($)

Dec. 31, 2020

USD ($)

Number of reportable segments | OperatingSegments

$ 6,081

$ 4,527

1,333

919

(530)

(483)

(27)

(246)

507

$ 127,522

$ 127,316

Number of reportable segments | TheNumberOfReportableSegments

$ 220

232

(14)

Sierra Pacific Power Company [Member] | Electricity Us Regulated Member

3,963

3,919

Regulated Operating Revenue

181

184

Sierra Pacific Power Company [Member] | Natural Gas US Regulated Member

3,589

3,540

Regulated Operating Revenue, Gas

$ 7

Sierra Pacific Power Company [Member] | Corporate and Other [Member]

348

342

^[1]

$ 26

$ 37

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

XML 188 R147.htm IDEA: XBRL DOCUMENT

Variable Interest Entities - EEGH (Details) - USD ($) $ in Millions	1 Months Ended				3 Months Ended
	Nov. 30, 2020	Jul. 31, 2020	Dec. 31, 2019	Nov. 30, 2019	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Eastern Energy Gas Holdings, LLC [Member] \| Cove Point LNG, LP [Member]
Schedule of Equity Method Investments [Line Items]
Ownership interest					75.00%	25.00%
Percentage interest distributed		25.00%
Eastern Energy Gas Holdings, LLC [Member] \| General Partner [Member] \| Variable Interest Entity, Primary Beneficiary [Member] \| Cove Point LNG, LP [Member]
Schedule of Equity Method Investments [Line Items]
Variable interest entity, ownership percentage					100.00%
Eastern Energy Gas Holdings, LLC [Member] \| Limited Partner [Member] \| Variable Interest Entity, Primary Beneficiary [Member] \| Cove Point LNG, LP [Member]
Schedule of Equity Method Investments [Line Items]
Variable interest entity, ownership percentage					25.00%
Eastern Energy Gas Holdings, LLC [Member] \| Disposal Group, Disposed of by Means Other than Sale, Not Discontinued Operations [Member] \| GT&S Transaction [Member] \| Cove Point LNG, LP [Member]
Schedule of Equity Method Investments [Line Items]
Percentage interest distributed	50.00%
Eastern Energy Gas Holdings, LLC [Member] \| Cove Point LNG, LP [Member] \| Dominion Energy, Inc. [Member]
Schedule of Equity Method Investments [Line Items]
Ownership interest				75.00%
Eastern Energy Gas Holdings, LLC [Member] \| Cove Point LNG, LP [Member] \| Disposal Group, Disposed of by Means Other than Sale, Not Discontinued Operations [Member] \| GT&S Transaction [Member]
Schedule of Equity Method Investments [Line Items]
Percentage interest distributed	50.00%
Eastern Energy Gas Holdings, LLC [Member] \| Carolina Gas Services, Inc. [Member] \| Variable Interest Entity, Not Primary Beneficiary [Member]
Schedule of Equity Method Investments [Line Items]
Due to related parties					$ 26		$ 22
Eastern Energy Gas Holdings, LLC [Member] \| Carolina Gas Services, Inc. [Member] \| Shared Services [Member] \| Variable Interest Entity, Not Primary Beneficiary [Member]
Schedule of Equity Method Investments [Line Items]
Amounts of transaction					$ 3	$ 4
Eastern Energy Gas Holdings, LLC [Member] \| Dominion Energy Questar Pipeline Services, Inc. [Member] \| Shared Services [Member] \| Variable Interest Entity, Not Primary Beneficiary [Member]
Schedule of Equity Method Investments [Line Items]
Amounts of transaction						7
Eastern Energy Gas Holdings, LLC [Member] \| Dominion Energy Services, Inc. [Member] \| Shared Services [Member] \| Variable Interest Entity, Not Primary Beneficiary [Member]
Schedule of Equity Method Investments [Line Items]
Amounts of transaction						$ 31
Dominion Energy, Inc. [Member] \| Cove Point LNG, LP [Member]
Schedule of Equity Method Investments [Line Items]
Sold noncontrolling partner interest			25.00%

XML 189 R148.htm IDEA: XBRL DOCUMENT

Related Party Transactions - EEGH - Significant Transactions (Details) - USD ($)
$ in Millions

3 Months Ended

12 Months Ended

Mar. 31, 2021

Mar. 31, 2020

Dec. 31, 2018

Capitalized expenditures

$ 1,295

$ 1,356

Eastern Energy Gas Holdings, LLC [Member] | Affiliated Entity [Member]

Capitalized expenditures

$ 55

Sales of natural gas and transportation and storage services

Purchases of natural gas and transportation and storage services / Services provided to related parties

$ 32

Services provided by related parties

^[1]

Capitalized expenditures

$ 3

[1]	Includes capitalized expenditures of $3 million.

XML 190 R149.htm IDEA: XBRL DOCUMENT

Related Party Transactions - EEGH - Narrative (Details) - USD ($)

3 Months Ended

12 Months Ended

Mar. 31, 2021

Mar. 31, 2020

Dec. 31, 2020

Feb. 28, 2021