Document

Investments and restricted cash and cash equivalents and investments

68,948

68,087

Goodwill

9,663

9,595

Regulatory assets

2,898

2,896

4,877

4,903

Other assets

2,048

1,561

Total assets

94,545

92,189

Current liabilities:

Accounts payable

1,434

1,809

Accrued interest

522

469

Accrued property, income and other taxes

475

599

Short-term debt

2,214

2,516

Current portion of long-term debt

1,078

2,081

Other current liabilities

1,358

1,021

Total current liabilities

7,397

8,770

Deferred income taxes

9,080

9,047

Regulatory liabilities

7,347

7,346

Other long-term liabilities

3,721

3,134

Total liabilities

64,383

62,466

Commitments and contingencies

Equity:

Additional paid-in capital

6,355

6,371

Retained earnings

25,968

25,624

Accumulated other comprehensive loss, net

(1,830)

(1,945)

Total member's equity

30,036

29,593

Total liabilities and equity

94,545

92,189

Cash and cash equivalents

Current assets:

433

Trade receivables, net

377

365

Income tax receivable

Inventories

149

204

Other current assets

Total current assets

1,072

659

Investments and restricted cash and cash equivalents and investments

16,557

16,169

Goodwill

1,270

Regulatory assets

260

273

763

710

Other assets

121

Total assets

^[1]

20,017

19,202

Current liabilities:

Accounts payable

350

575

Accrued interest

Accrued property, income and other taxes

161

300

Notes Payable, Related Parties, Current

167

156

Short-term debt

240

Current portion of long-term debt

500

Other current liabilities

164

122

Total current liabilities

912

1,951

Long-term debt

6,581

5,119

Deferred income taxes

2,369

2,319

Regulatory liabilities

1,597

1,620

Asset retirement obligations

735

552

Other long-term liabilities

304

312

Total liabilities

12,498

11,873

Commitments and contingencies

Equity:

Additional paid-in capital

1,679

Retained earnings

5,840

5,650

Total member's equity

7,519

7,329

Total liabilities and equity

$ 20,017

$ 19,202

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

XML 44 R8.htm IDEA: XBRL DOCUMENT

Consolidated Balance Sheets - NPC - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 1,661	$ 627
Inventories	785	844
Other current assets	1,080	943
Total current assets	6,111	5,147
Regulatory assets	2,898	2,896
Finance Lease, Right-of-Use Asset	509
Other assets	2,048	1,561
Total assets	94,545	92,189
Current liabilities:
Accounts payable	1,434	1,809
Accrued interest	522	469
Accrued property, income and other taxes	475	599
Current portion of long-term debt	1,078	2,081
Other current liabilities	1,358	1,021
Total current liabilities	7,397	8,770
Regulatory liabilities	7,347	7,346
Deferred income taxes	9,080	9,047
Other long-term liabilities	3,721	3,134
Total liabilities	64,383	62,466
Commitments and contingencies
Equity:
Common stock	0	0
Additional paid-in capital	6,355	6,371
Retained earnings	25,968	25,624
Accumulated other comprehensive loss, net	(1,830)	(1,945)
Total BHE shareholders' equity	30,036	29,593
Total liabilities and equity	94,545	92,189
Nevada Power Company [Member]
Current assets:
Cash and cash equivalents	51	111
Trade receivables, net	193	233
Inventories	63	61
Regulatory assets	72	39
Other current assets	64	75
Total current assets	443	519
Property, plant and equipment, net	6,443	6,418
Regulatory assets	862	878
Finance Lease, Right-of-Use Asset	449	450
Other assets	60	37
Total assets	8,257	8,302
Current liabilities:
Accounts payable	178	187
Accrued interest	35	38
Accrued property, income and other taxes	28	30
Current portion of long-term debt	0	500
Finance Lease, Liability, Current	24	20
Regulatory liabilities	50	49
Customer deposits	76	67
Other current liabilities	38	29
Total current liabilities	429	920
Long-term debt	2,348	1,853
Finance Lease, Liability, Noncurrent	438	443
Regulatory liabilities	1,156	1,137
Deferred income taxes	750	749
Other long-term liabilities	301	296
Total liabilities	5,422	5,398
Commitments and contingencies
Equity:
Common stock	0	0
Additional paid-in capital	2,308	2,308
Retained earnings	531	600
Accumulated other comprehensive loss, net	(4)	(4)
Total BHE shareholders' equity	2,835	2,904
Total liabilities and equity	$ 8,257	$ 8,302

XML 45 R9.htm IDEA: XBRL DOCUMENT

Consolidated Balance Sheets (Parenthetical) - NPC - $ / shares	Mar. 31, 2019	Dec. 31, 2018
Common stock, shares authorized	115,000,000	115,000,000
Common stock, shares issued	77,000,000	77,000,000
Common stock, shares outstanding	77,000,000	77,000,000
Nevada Power Company [Member]
Common Stock, Par or Stated Value Per Share	$ 1.00	$ 1.00
Common stock, shares authorized	1,000	1,000
Common stock, shares issued	1,000	1,000
Common stock, shares outstanding	1,000	1,000

XML 46 R10.htm IDEA: XBRL DOCUMENT

Consolidated Balance Sheets - SPPC - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 1,661	$ 627
Inventories	785	844
Other current assets	1,080	943
Total current assets	6,111	5,147
Regulatory assets	2,898	2,896
Other assets	2,048	1,561
Total assets	94,545	92,189
Current liabilities:
Accounts payable	1,434	1,809
Accrued interest	522	469
Accrued property, income and other taxes	475	599
Other current liabilities	1,358	1,021
Total current liabilities	7,397	8,770
Long-term debt, carrying value	37,916	36,250
Regulatory liabilities	7,347	7,346
Deferred income taxes	9,080	9,047
Other long-term liabilities	3,721	3,134
Total liabilities	64,383	62,466
Commitments and contingencies
Equity:
Common stock	0	0
Additional paid-in capital	6,355	6,371
Retained earnings	25,968	25,624
Total BHE shareholders' equity	30,036	29,593
Total liabilities and equity	94,545	92,189
Sierra Pacific Power Company [Member]
Current assets:
Cash and cash equivalents	62	71
Trade receivables, net	95	100
Inventories	53	52
Regulatory assets	31	7
Other current assets	33	33
Total current assets	274	263
Property, plant and equipment, net	2,965	2,947
Regulatory assets	312	314
Other assets	66	45
Total assets	3,617	3,569
Current liabilities:
Accounts payable	110	116
Accrued interest	11	13
Accrued property, income and other taxes	17	14
Regulatory liabilities	23	18
Customer deposits	21	18
Other current liabilities	23	18
Total current liabilities	205	197
Long-term debt, carrying value	1,120	1,120
Regulatory liabilities	491	491
Deferred income taxes	338	331
Other long-term liabilities	177	166
Total liabilities	2,331	2,305
Commitments and contingencies
Equity:
Common stock	0	0
Additional paid-in capital	1,111	1,111
Retained earnings	175	153
Total BHE shareholders' equity	1,286	1,264
Total liabilities and equity	$ 3,617	$ 3,569

XML 47 R11.htm IDEA: XBRL DOCUMENT

Consolidated Balance Sheets (Parenthetical) - SPPC - $ / shares	Mar. 31, 2019	Dec. 31, 2018
Common stock, shares authorized	115,000,000	115,000,000
Common stock, shares issued	77,000,000	77,000,000
Common stock, shares outstanding	77,000,000	77,000,000
Sierra Pacific Power Company [Member]
Common Stock, Par or Stated Value Per Share	$ 3.75	$ 3.75
Common stock, shares authorized	20,000,000	20,000,000
Common stock, shares issued	1,000	1,000
Common stock, shares outstanding	1,000	1,000

XML 48 R12.htm IDEA: XBRL DOCUMENT

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

XML 49 R13.htm IDEA: XBRL DOCUMENT

Consolidated Statements of Operations - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Operating revenue:
Total operating revenue	$ 4,610	$ 4,440
Cost of sales	1,214	1,168
Energy:
Operations and maintenance	802	785
Depreciation and amortization	720	704
Property and other taxes	149	143
Real estate	806	769
Total operating expenses	3,691	3,569
Operating income	919	871
Other income (expense):
Interest expense	(477)	(466)
Capitalized interest	16	12
Allowance for equity funds	32	21
Interest and dividend income	30	26
Losses on marketable securities, net	(68)	(209)
Other, net	35	30
Total other income (expense)	(432)	(586)
Income before income tax benefit and equity (loss) income	487	285
Income tax benefit	(148)	(221)
Equity (loss) income	(10)	12
Net income	625	518
Net income attributable to noncontrolling interests	3	5
Net income attributable to BHE shareholders	622	513
Electricity and natural gas [Member]
Operating revenue:
Total operating revenue	3,825	3,679
Residential real estate brokerage and mortgage businesses [Member]
Operating revenue:
Total operating revenue	$ 785	$ 761

XML 50 R14.htm IDEA: XBRL DOCUMENT

Consolidated Statements of Operations - PacifiCorp - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Operating revenue	$ 4,610	$ 4,440
Cost of sales	1,214	1,168
Operating expenses:
Operating income	919	871
Other income (expense):
Interest expense	(477)	(466)
Allowance for borrowed funds	16	12
Allowance for equity funds	32	21
Other, net	35	30
Total other income (expense)	(432)	(586)
Income before income tax expense and equity income	487	285
Income tax benefit	(148)	(221)
Net income attributable to BHE shareholders	622	513
PacifiCorp [Member]
Operating revenue	1,259	1,184
Cost of sales	465	433
Operating expenses:
Operations and maintenance	256	250
Depreciation and amortization	205	202
Property and other taxes	49	52
Utilities Operating Expense	975	937
Operating income	284	247
Other income (expense):
Interest expense	(96)	(96)
Allowance for borrowed funds	7	4
Allowance for equity funds	14	7
Other, net	12	11
Total other income (expense)	(63)	(74)
Income before income tax expense and equity income	221	173
Income tax benefit	42	25
Net income attributable to BHE shareholders	$ 179	$ 148

XML 51 R15.htm IDEA: XBRL DOCUMENT

Statements of Operations - MEC - USD ($) $ in Millions	3 Months Ended
Statements of Operations - MEC - USD ($) $ in Millions	Mar. 31, 2019	Mar. 31, 2018
Operating revenue:
Total operating revenue	$ 4,610	$ 4,440
Cost of sales	1,214	1,168
Operating expenses:
Total operating expenses	3,691	3,569
Operating income	919	871
Other income (expense):
Interest expense	(477)	(466)
Allowance for borrowed funds	16	12
Allowance for equity funds	32	21
Other, net	35	30
Total other income (expense)	(432)	(586)
Income before income tax (benefit) expense and equity income	487	285
Income tax benefit	(148)	(221)
Net Income (Loss) Attributable to Parent	622	513
MidAmerican Energy Company [Member]
Operating revenue:
Total operating revenue	842	746
Operating expenses:
Operations and maintenance	207	190
Depreciation and amortization	177	158
Property and other taxes	34	32
Total operating expenses	727	667
Operating income	115	79
Other income (expense):
Interest expense	(69)	(58)
Allowance for borrowed funds	6	4
Allowance for equity funds	15	10
Other, net	20	9
Total other income (expense)	(28)	(35)
Income before income tax (benefit) expense and equity income	87	44
Income tax benefit	(106)	(62)
Net Income (Loss) Attributable to Parent	193	106
Regulated electric \| MidAmerican Energy Company [Member]
Operating revenue:
Total operating revenue	542	469
Cost of sales	114	108
Regulated natural gas and other \| MidAmerican Energy Company [Member]
Operating revenue:
Total operating revenue	300	277
Cost of sales	$ 195	$ 179

XML 52 R16.htm IDEA: XBRL DOCUMENT

Consolidated Statements of Operations - MidAmerican Funding - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Operating revenue:
Total operating revenue	$ 4,610	$ 4,440
Cost of sales	1,214	1,168
Operating expenses:
Total operating expenses	3,691	3,569
Operating income	919	871
Other income (expense):
Other Interest and Dividend Income	(477)	(466)
Allowance for borrowed funds	16	12
Allowance for equity funds	32	21
Other, net	35	30
Total other income (expense)	(432)	(586)
Income before income tax (benefit) expense and equity income	487	285
Income tax benefit	(148)	(221)
Net Income (Loss) Attributable to Parent	622	513
MidAmerican Funding, LLC and Subsidiaries [Domain]
Operating revenue:
Total operating revenue	842	747
Operating expenses:
Operations and maintenance	207	190
Depreciation and amortization	177	158
Property and other taxes	34	32
Total operating expenses	726	668
Operating income	116	79
Other income (expense):
Other Interest and Dividend Income	(75)	(63)
Allowance for borrowed funds	6	4
Allowance for equity funds	15	10
Other, net	21	10
Total other income (expense)	(33)	(39)
Income before income tax (benefit) expense and equity income	83	40
Income tax benefit	(107)	(63)
Net Income (Loss) Attributable to Parent	190	103
Regulated electric \| MidAmerican Funding, LLC and Subsidiaries [Domain]
Operating revenue:
Total operating revenue	542	469
Cost of sales	114	108
Regulated natural gas and other \| MidAmerican Funding, LLC and Subsidiaries [Domain]
Operating revenue:
Total operating revenue	300	278
Cost of sales	$ 194	$ 180

XML 53 R17.htm IDEA: XBRL DOCUMENT

Consolidated Statements of Operations - NPC - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Operating revenue	$ 4,610	$ 4,440
Cost of sales	1,214	1,168
Total operating expenses	3,691	3,569
Operating income	919	871
Interest expense	(477)	(466)
Capitalized interest	16	12
Allowance for equity funds	32	21
Other, net	35	30
Total other income (expense)	(432)	(586)
Income before income tax expense and equity income	487	285
Income tax benefit	(148)	(221)
Net income attributable to BHE shareholders	622	513
Nevada Power Company [Member]
Operating revenue	395	395
Cost of sales	173	170
Operations and maintenance	76	91
Depreciation and amortization	89	84
Property and other taxes	12	10
Total operating expenses	350	355
Operating income	45	40
Interest expense	(47)	(45)
Capitalized interest	1	0
Allowance for equity funds	1	1
Other, net	8	4
Total other income (expense)	(37)	(40)
Income before income tax expense and equity income	8	0
Income tax benefit	2	0
Net income attributable to BHE shareholders	$ 6	$ 0

XML 54 R18.htm IDEA: XBRL DOCUMENT

Consolidated Statements of Operations - SPPC - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Total operating revenue	$ 4,610	$ 4,440
Cost of sales	1,214	1,168
Total operating expenses	3,691	3,569
Operating income	919	871
Interest expense	(477)	(466)
Allowance for equity funds	32	21
Other, net	35	30
Total other income (expense)	(432)	(586)
Income before income tax expense and equity income	487	285
Income tax benefit	(148)	(221)
Net income attributable to BHE shareholders	622	513
Sierra Pacific Power Company [Member]
Total operating revenue	219	222
Operations and maintenance	44	39
Depreciation and amortization	31	30
Property and other taxes	6	6
Total operating expenses	182	175
Operating income	37	47
Interest expense	(12)	(10)
Allowance for equity funds	1	1
Other, net	2	2
Total other income (expense)	(9)	(7)
Income before income tax expense and equity income	28	40
Income tax benefit	6	6
Net income attributable to BHE shareholders	22	34
Regulated electric \| Sierra Pacific Power Company [Member]
Total operating revenue	182	181
Cost of sales	82	77
Regulated natural gas \| Sierra Pacific Power Company [Member]
Total operating revenue	37	41
Cost of sales	$ 19	$ 23

XML 55 R19.htm IDEA: XBRL DOCUMENT

Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Statement of Comprehensive Income [Abstract]
Net income	$ 625	$ 518
Other comprehensive income, net of tax:
Unrecognized amounts on retirement benefits, net of tax	32	3
Foreign currency translation adjustment	155	73
Unrealized losses on cash flow hedges, net of tax	(8)	(2)
Total other comprehensive (loss) income, net of tax	115	68
Comprehensive income	740	586
Comprehensive income attributable to noncontrolling interests	3	5
Comprehensive income attributable to BHE shareholders	$ 737	$ 581

XML 56 R20.htm IDEA: XBRL DOCUMENT

Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Consolidated Statements of Comprehensive Income Parenthetical [Abstract]
Unrecognized amounts on retirement benefits, tax	$ (7)	$ (4)
Unrealized (losses) gains on marketable securities, tax	0	0
Unrealized (losses) gains on cash flow hedges, tax	$ (2)	$ (1)

XML 57 R21.htm IDEA: XBRL DOCUMENT

Consolidated Statements of Changes in Equity - USD ($) shares in Millions, $ in Millions	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Long-term income tax receivable [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive (Loss) Income, Net [Member]	Noncontrolling Interest [Member]
Balance (shares) at Dec. 31, 2017		77
Balance at Dec. 31, 2017	$ 28,308	$ 0	$ 6,368		$ 22,206	$ (398)	$ 132
Increase (Decrease) in Stockholders' Equity [Roll Forward]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification					1,085	(1,085)
Net Income	517	0	0		513	0	4
Other comprehensive income (loss)	68	0	0		0	68	0
Common stock purchases	(90)	0	(5)		(85)	0	0
Distributions	(9)	$ 0	0		0	0	(9)
Balance (shares) at Mar. 31, 2018		77
Balance at Mar. 31, 2018	28,794	$ 0	6,363		23,719	(1,415)	127
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Long-term income tax receivable	$ (457)			$ (457)
Balance (shares) at Dec. 31, 2018	77	77
Balance at Dec. 31, 2018	$ 29,723	$ 0	6,371		25,624	(1,945)	130
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	625	0	0		622	0	3
Other comprehensive income (loss)	115	0	0		0	115	0
Common stock purchases	(293)	0	(16)		(277)	0	0
Distributions	(7)	$ 0	0		0	0	(7)
Other equity transactions	$ (1)				(1)
Balance (shares) at Mar. 31, 2019	77	77
Balance at Mar. 31, 2019	$ 30,162	$ 0	$ 6,355		$ 25,968	$ (1,830)	$ 126
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Long-term income tax receivable	$ (457)			$ (457)

XML 58 R22.htm IDEA: XBRL DOCUMENT

Consolidated Statements of Changes in Equity - PacifiCorp - USD ($) $ in Millions	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive (Loss) Income, Net [Member]	PacifiCorp [Member]	PacifiCorp [Member] Preferred Stock [Member]	PacifiCorp [Member] Common Stock [Member]	PacifiCorp [Member] Additional Paid-in Capital [Member]	PacifiCorp [Member] Retained Earnings [Member]	PacifiCorp [Member] Accumulated Other Comprehensive (Loss) Income, Net [Member]
Stockholders' Equity Attributable to Parent at Dec. 31, 2017						$ 7,555	$ 2	$ 0	$ 4,479	$ 3,089	$ (15)
Net Income (Loss) Attributable to Parent	$ 513					148				148
Total other comprehensive (loss) income, net of tax	68	$ 0	$ 0	$ 0	$ 68
Dividends, Common Stock, Cash						(250)				(250)
Stockholders' Equity Attributable to Parent at Mar. 31, 2018						7,453	2	0	4,479	2,987	(15)
Stockholders' Equity Attributable to Parent at Dec. 31, 2018	29,593					7,845	2	0	4,479	3,377	(13)
Net Income (Loss) Attributable to Parent	622					179				179
Total other comprehensive (loss) income, net of tax	115	$ 0	$ 0	$ 0	$ 115	1					1
Dividends, Common Stock, Cash						(175)				(175)
Stockholders' Equity Attributable to Parent at Mar. 31, 2019	$ 30,036					$ 7,850	$ 2	$ 0	$ 4,479	$ 3,381	$ (12)

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

XML 59 R23.htm IDEA: XBRL DOCUMENT

Statements of Changes in Shareholder's Equity - MEC - USD ($) $ in Millions	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive (Loss) Income, Net [Member]	MidAmerican Energy Company [Member]	MidAmerican Energy Company [Member] Common Stock [Member]	MidAmerican Energy Company [Member] Additional Paid-in Capital [Member]	MidAmerican Energy Company [Member] Retained Earnings [Member]
Stockholders' Equity Attributable to Parent at Dec. 31, 2017						$ 5,764	$ 0	$ 561	$ 5,203
Net Income (Loss) Attributable to Parent	$ 513					106			106
Other comprehensive income (loss)	68	$ 0	$ 0	$ 0	$ 68
Stockholders' Equity Attributable to Parent at Mar. 31, 2018						5,870	0	561	5,309
Stockholders' Equity Attributable to Parent at Dec. 31, 2018	29,593					6,446	0	561	5,885
Net Income (Loss) Attributable to Parent	622					193			193
Other comprehensive income (loss)	115	$ 0	$ 0	0	$ 115
Stockholders' Equity, Other	(1)			$ (1)
Stockholders' Equity Attributable to Parent at Mar. 31, 2019	$ 30,036					$ 6,639	$ 0	$ 561	$ 6,078

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

XML 60 R24.htm IDEA: XBRL DOCUMENT

Consolidated Statements of Changes in Member's Equity - MidAmerican Funding - USD ($) $ in Millions	Total	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive (Loss) Income, Net [Member]	MidAmerican Funding, LLC and Subsidiaries [Domain]	MidAmerican Funding, LLC and Subsidiaries [Domain] Additional Paid-in Capital [Member]	MidAmerican Funding, LLC and Subsidiaries [Domain] Retained Earnings [Member]
Stockholders' Equity Attributable to Parent at Dec. 31, 2017					$ 6,660	$ 1,679	$ 4,981
Net Income (Loss) Attributable to Parent	$ 513				103		103
Other comprehensive income (loss)	68	$ 0	$ 0	$ 68
Stockholders' Equity Attributable to Parent at Mar. 31, 2018					6,763	1,679	5,084
Stockholders' Equity Attributable to Parent at Dec. 31, 2018	29,593				7,329	1,679	5,650
Net Income (Loss) Attributable to Parent	622				190		190
Other comprehensive income (loss)	115	$ 0	0	$ 115
Stockholders' Equity Attributable to Parent at Mar. 31, 2019	30,036				$ 7,519	$ 1,679	$ 5,840
Stockholders' Equity, Other	$ (1)		$ (1)

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

XML 61 R25.htm IDEA: XBRL DOCUMENT

Consolidated Statements of Changes in Equity - NPC - USD ($) $ in Millions	Total	Common Stock [Member]	Nevada Power Company [Member]	Nevada Power Company [Member] Common Stock [Member]	Nevada Power Company [Member] Additional Paid-in Capital [Member]	Nevada Power Company [Member] Retained Earnings [Member]	Nevada Power Company [Member] Accumulated Other Comprehensive (Loss) Income, Net [Member]
Balance (shares) at Dec. 31, 2017		77,000,000		1,000
Stockholders' Equity Attributable to Parent at Dec. 31, 2017			$ 2,678	$ 0	$ 2,308	$ 374	$ (4)
Net Income (Loss) Attributable to Parent	$ 513		0
Balance (shares) at Mar. 31, 2018		77,000,000		1,000
Stockholders' Equity Attributable to Parent at Mar. 31, 2018			$ 2,678	$ 0	2,308	374	(4)
Balance (shares) at Dec. 31, 2018	77,000,000	77,000,000	1,000	1,000
Stockholders' Equity Attributable to Parent at Dec. 31, 2018	$ 29,593		$ 2,904	$ 0	2,308	600	(4)
Net Income (Loss) Attributable to Parent	$ 622		6			6
Dividends, Common Stock, Cash			$ 75			75
Balance (shares) at Mar. 31, 2019	77,000,000	77,000,000	1,000	1,000
Stockholders' Equity Attributable to Parent at Mar. 31, 2019	$ 30,036		$ 2,835	$ 0	$ 2,308	$ 531	$ (4)

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

XML 62 R26.htm IDEA: XBRL DOCUMENT

Consolidated Statements of Changes in Equity - SPPC - USD ($) $ in Millions	Total	Common Stock [Member]	Sierra Pacific Power Company [Member]	Sierra Pacific Power Company [Member] Common Stock [Member]	Sierra Pacific Power Company [Member] Additional Paid-in Capital [Member]	Sierra Pacific Power Company [Member] Retained Earnings [Member]	Sierra Pacific Power Company [Member] Accumulated Other Comprehensive (Loss) Income, Net [Member]
Balance (shares) at Dec. 31, 2017		77,000,000		1,000
Stockholders' Equity Attributable to Parent at Dec. 31, 2017			$ 1,172	$ 0	$ 1,111	$ 62	$ (1)
Net Income (Loss) Attributable to Parent	$ 513		34			34
Balance (shares) at Mar. 31, 2018		77,000,000		1,000
Stockholders' Equity Attributable to Parent at Mar. 31, 2018			$ 1,206	$ 0	1,111	96	(1)
Balance (shares) at Dec. 31, 2018	77,000,000	77,000,000	1,000	1,000
Stockholders' Equity Attributable to Parent at Dec. 31, 2018	$ 29,593		$ 1,264	$ 0	1,111	153	0
Net Income (Loss) Attributable to Parent	$ 622		$ 22			22
Balance (shares) at Mar. 31, 2019	77,000,000	77,000,000	1,000	1,000
Stockholders' Equity Attributable to Parent at Mar. 31, 2019	$ 30,036		$ 1,286	$ 0	$ 1,111	$ 175	$ 0

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

Restricted Cash and Cash Equivalents Items [Line Items]

XML 63 R27.htm IDEA: XBRL DOCUMENT

Consolidated Statements of Cash Flows - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Cash flows from operating activities:
Net income	$ 625	$ 518
Adjustments to reconcile net income to net cash flows from operating activities:
Losses on marketable securities, net	(68)	(209)
Depreciation and amortization	733	716
Allowance for equity funds	(32)	(21)
Equity loss (income), net of distributions	26	(5)
Changes in regulatory assets and liabilities	(52)	94
Deferred income taxes and amortization of investment tax credits	(21)	(166)
Other, net	1	19
Changes in other operating assets and liabilities, net of effects from acquisitions:
Trade receivables and other assets	144	250
Derivative collateral, net	(3)	(14)
Pension and other postretirement benefit plans	(21)	(21)
Accrued property, income and other taxes, net	(48)	(60)
Accounts payable and other liabilities	68	(40)
Net cash flows from operating activities	1,488	1,479
Cash flows from investing activities:
Capital expenditures	(1,393)	(1,075)
Acquisitions, net of cash acquired	(26)	0
Purchases of marketable securities	159	155
Proceeds from sales of marketable securities	153	132
Equity method investments	(7)	(156)
Other, net	17	31
Net cash flows from investing activities	(1,415)	(1,223)
Cash flows from financing activities:
Proceeds from BHE senior debt	0	2,176
Common stock purchases	(293)	(90)
Proceeds from subsidiary debt	2,945	687
Repayments of subsidiary debt	(1,420)	(550)
Net repayments of short-term debt	(311)	(1,873)
Other, net	(21)	(14)
Net cash flows from financing activities	900	336
Effect of exchange rate changes	1	1
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect	974	593
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	$ 1,857	$ 1,876

XML 64 R28.htm IDEA: XBRL DOCUMENT

Consolidated Statements of Cash Flows - PacifiCorp - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Net Income (Loss) Attributable to Parent	$ 622	$ 513
Increase (Decrease) in Allowance for Equity Funds Used During Construction	(32)	(21)
Changes in regulatory assets and liabilities	(52)	94
Deferred income taxes and amortization of investment tax credits	(21)	(166)
Other Noncash Income (Expense)	1	19
Trade receivables and other assets	144	250
Derivative collateral, net	(3)	(14)
Accrued property, income and other taxes, net	(48)	(60)
Accounts payable and other liabilities	68	(40)
Net cash flows from operating activities	1,488	1,479
Capital expenditures	(1,393)	(1,075)
Other, net	17	31
Net cash flows from investing activities	(1,415)	(1,223)
Net proceeds from (repayments of) short-term debt	311	1,873
Other, net	(21)	(14)
Net cash flows from financing activities	900	336
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect	974	593
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	1,857	1,876
PacifiCorp [Member]
Net Income (Loss) Attributable to Parent	179	148
Depreciation and amortization	205	202
Increase (Decrease) in Allowance for Equity Funds Used During Construction	(14)	(7)
Changes in regulatory assets and liabilities	(35)	60
Deferred income taxes and amortization of investment tax credits	5	(28)
Other Noncash Income (Expense)	(1)	1
Trade receivables and other assets	28	97
Increase (Decrease) in Inventories	11	(12)
Derivative collateral, net	7	(3)
Accrued property, income and other taxes, net	68	83
Accounts payable and other liabilities	41	(8)
Net cash flows from operating activities	494	533
Capital expenditures	(337)	(236)
Other, net	1	(1)
Net cash flows from investing activities	(336)	(237)
Proceeds from Issuance of Long-term Debt	990	0
Repayments of BHE senior debt and junior subordinated debentures	(350)	(86)
Payments of Ordinary Dividends, Common Stock	(175)	(250)
Other, net	(31)	43
Net cash flows from financing activities	434	(293)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect	592	3
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	$ 684	$ 32

XML 65 R29.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, 2019	Mar. 31, 2018
Net Income (Loss) Attributable to Parent	$ 622	$ 513
Allowance for equity funds	(32)	(21)
Deferred income taxes and amortization of investment tax credits	(21)	(166)
Other Noncash Income (Expense)	1	19
Derivative collateral, net	(3)	(14)
Pension and other postretirement benefit plans	(21)	(21)
Accrued property, income and other taxes, net	(48)	(60)
Net cash flows from operating activities	1,488	1,479
Capital expenditures	(1,393)	(1,075)
Purchases of marketable securities	159	155
Proceeds from sales of marketable securities	153	132
Other, net	17	31
Net cash flows from investing activities	(1,415)	(1,223)
Net repayments of short-term debt	(311)	(1,873)
Other, net	(21)	(14)
Net cash flows from financing activities	900	336
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect	974	593
Cash and cash equivalents and restricted cash and cash equivalents at end of period	1,661
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	1,857	1,876
MidAmerican Energy Company [Member]
Net Income (Loss) Attributable to Parent	193	106
Depreciation and amortization	177	158
Amortization of Utility Plant to Other Operating Expense	8	8
Allowance for equity funds	(15)	(10)
Deferred income taxes and amortization of investment tax credits	31	19
Other Noncash Income (Expense)	3	2
Increase (Decrease) in Accounts Receivable and Other Current Operating Assets	30	(15)
Increase (Decrease) in Inventories	55	37
Derivative collateral, net	0	(2)
Pension and other postretirement benefit plans	(3)	(3)
Increase (Decease) in Accounts Payable and Other Current Operating Liabilities	18	(18)
Accrued property, income and other taxes, net	(159)	(82)
Net cash flows from operating activities	278	230
Capital expenditures	(573)	(365)
Purchases of marketable securities	71	95
Proceeds from sales of marketable securities	68	74
Other, net	1	15
Net cash flows from investing activities	(575)	(371)
Proceeds from Issuance of Long-term Debt	1,460	687
Repayments of BHE senior debt and junior subordinated debentures	(500)	(350)
Net repayments of short-term debt	(240)	0
Net cash flows from financing activities	720	337
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect	423	196
Cash and cash equivalents and restricted cash and cash equivalents at end of period	432
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	$ 479	$ 478

XML 66 R30.htm IDEA: XBRL DOCUMENT

Consolidated Statements of Cash Flows - MidAmerican Funding - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Net Income (Loss) Attributable to Parent	$ 622	$ 513
Allowance for equity funds	(32)	(21)
Deferred income taxes and amortization of investment tax credits	(21)	(166)
Other Noncash Income (Expense)	1	19
Derivative collateral, net	(3)	(14)
Pension and other postretirement benefit plans	(21)	(21)
Accrued property, income and other taxes, net	(48)	(60)
Net cash flows from operating activities	1,488	1,479
Capital expenditures	(1,393)	(1,075)
Purchases of marketable securities	(159)	(155)
Proceeds from sales of marketable securities	153	132
Other, net	17	31
Net cash flows from investing activities	(1,415)	(1,223)
Net repayments of short-term debt	(311)	(1,873)
Other, net	(21)	(14)
Net cash flows from financing activities	900	336
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect	974	593
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	1,857	1,876
Cash and cash equivalents and restricted cash and cash equivalents at end of period	1,661
MidAmerican Funding, LLC and Subsidiaries [Domain]
Net Income (Loss) Attributable to Parent	190	103
Depreciation and amortization	177	158
Amortization of Utility Plant to Other Operating Expense	8	8
Allowance for equity funds	(15)	(10)
Deferred income taxes and amortization of investment tax credits	31	19
Other Noncash Income (Expense)	4	3
Increase (Decrease) in Accounts Receivable and Other Current Operating Assets	33	(19)
Increase (Decrease) in Inventories	55	37
Derivative collateral, net	0	(2)
Pension and other postretirement benefit plans	(3)	(3)
Increase (Decease) in Accounts Payable and Other Current Operating Liabilities	14	(21)
Accrued property, income and other taxes, net	(160)	(83)
Net cash flows from operating activities	268	228
Capital expenditures	(573)	(365)
Purchases of marketable securities	(71)	(95)
Proceeds from sales of marketable securities	68	74
Other, net	0	15
Net cash flows from investing activities	(576)	(371)
Proceeds from Issuance of Long-term Debt	1,460	687
Repayments of BHE senior debt and junior subordinated debentures	(500)	(350)
Increase (Decrease) in Notes Payable, Related Parties, Current	11	2
Net repayments of short-term debt	(240)	0
Net cash flows from financing activities	731	339
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect	423	196
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	480	$ 478
Cash and cash equivalents and restricted cash and cash equivalents at end of period	$ 433

XML 67 R31.htm IDEA: XBRL DOCUMENT

Consolidated Statements of Cash Flows - NPC - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Net Income (Loss) Attributable to Parent	$ 622	$ 513
Allowance for equity funds	(32)	(21)
Changes in regulatory assets and liabilities	(52)	94
Deferred income taxes and amortization of investment tax credits	(21)	(166)
Other Noncash Income (Expense)	1	19
Trade receivables and other assets	144	250
Accrued property, income and other taxes, net	(48)	(60)
Accounts payable and other liabilities	68	(40)
Net cash flows from operating activities	1,488	1,479
Capital expenditures	(1,393)	(1,075)
Net cash flows from investing activities	(1,415)	(1,223)
Other, net	(21)	(14)
Net cash flows from financing activities	900	336
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect	974	593
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	883	1,283
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	1,857	1,876
Nevada Power Company [Member]
Net Income (Loss) Attributable to Parent	6	0
Depreciation and amortization	89	84
Allowance for equity funds	(1)	(1)
Changes in regulatory assets and liabilities	28	10
Deferred income taxes and amortization of investment tax credits	2	(7)
Deferred Energy Change	(33)	0
Amortization of Deferred Charges	3	3
Other Noncash Income (Expense)	(5)	0
Trade receivables and other assets	48	57
Increase (Decrease) in Inventories	(2)	1
Accrued property, income and other taxes, net	(11)	(1)
Accounts payable and other liabilities	11	(36)
Net cash flows from operating activities	135	110
Capital expenditures	(113)	(64)
Proceeds from Sale of Other Assets, Investing Activities	2	0
Net cash flows from investing activities	(111)	(64)
Proceeds from Issuance of Long-term Debt	495	0
Repayments of BHE senior debt and junior subordinated debentures	(500)	0
Payments of Ordinary Dividends, Common Stock	(75)	0
Other, net	(3)	(5)
Net cash flows from financing activities	(83)	(5)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect	(59)	41
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	121	66
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	$ 62	$ 107

XML 68 R32.htm IDEA: XBRL DOCUMENT

Consolidated Statements of Cash Flows - SPPC - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Net Income (Loss) Attributable to Parent	$ 622	$ 513
Allowance for equity funds	(32)	(21)
Changes in regulatory assets and liabilities	(52)	94
Deferred income taxes and amortization of investment tax credits	(21)	(166)
Other Noncash Income (Expense)	(1)	(19)
Trade receivables and other assets	144	250
Accrued property, income and other taxes, net	(48)	(60)
Accounts payable and other liabilities	68	(40)
Net cash flows from operating activities	1,488	1,479
Capital expenditures	(1,393)	(1,075)
Net cash flows from investing activities	(1,415)	(1,223)
Net cash flows from financing activities	900	336
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect	974	593
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	883	1,283
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	1,857	1,876
Sierra Pacific Power Company [Member]
Net Income (Loss) Attributable to Parent	22	34
Depreciation and amortization	31	30
Allowance for equity funds	(1)	(1)
Changes in regulatory assets and liabilities	11	12
Deferred income taxes and amortization of investment tax credits	5	6
Deferred Energy Change	(22)	13
Amortization of Deferred Charges	(5)	(4)
Other Noncash Income (Expense)	1	0
Trade receivables and other assets	7	3
Accrued property, income and other taxes, net	(2)	(2)
Accounts payable and other liabilities	(1)	(16)
Net cash flows from operating activities	44	75
Capital expenditures	(52)	(45)
Net cash flows from investing activities	(52)	(45)
Net cash flows from financing activities	0	0
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect	(8)	30
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	76	8
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	$ 68	$ 38

XML 69 R33.htm IDEA: XBRL DOCUMENT

General	3 Months Ended
General	Mar. 31, 2019
Segment Reporting Information [Line Items]
General/Organization and Operations	General Berkshire Hathaway Energy Company ("BHE") is a holding company that owns a highly diversified portfolio of locally managed businesses principally engaged in the energy industry (collectively with its subsidiaries, the "Company") and is a consolidated subsidiary of Berkshire Hathaway Inc. ("Berkshire Hathaway"). The Company's operations are organized as eight business segments: PacifiCorp, MidAmerican Funding, LLC ("MidAmerican Funding") (which primarily consists of MidAmerican Energy Company ("MidAmerican Energy")), NV Energy, Inc. ("NV Energy") (which primarily consists of Nevada Power Company ("Nevada Power") and Sierra Pacific Power Company ("Sierra Pacific")), Northern Powergrid Holdings Company ("Northern Powergrid") (which primarily consists of Northern Powergrid (Northeast) Limited and Northern Powergrid (Yorkshire) plc), BHE Pipeline Group (which consists of Northern Natural Gas Company ("Northern Natural Gas") and Kern River Gas Transmission Company ("Kern River")), BHE Transmission (which consists of BHE Canada Holdings Corporation ("BHE Canada") (which primarily consists of AltaLink, L.P. ("AltaLink")) and BHE U.S. Transmission, LLC), BHE Renewables (which primarily consists of BHE Renewables, LLC and CalEnergy Philippines) and HomeServices of America, Inc. (collectively with its subsidiaries, "HomeServices"). The Company, through these locally managed and operated businesses, owns four utility companies in the United States serving customers in 11 states, two electricity distribution companies in Great Britain, two interstate natural gas pipeline companies in the United States, an electric transmission business in Canada, interests in electric transmission businesses in the United States, a renewable energy business primarily investing in wind, solar, geothermal and hydroelectric projects, the largest residential real estate brokerage firm in the United States and one of the largest residential real estate brokerage franchise networks in the United States. The unaudited Consolidated Financial Statements have been prepared in accordance with accounting principles generally accepted in the United States of America ("GAAP") for interim financial information and the United States Securities and Exchange Commission's rules and regulations for Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the disclosures required by GAAP for annual financial statements. Management believes the unaudited Consolidated Financial Statements contain all adjustments (consisting only of normal recurring adjustments) considered necessary for the fair presentation of the unaudited Consolidated Financial Statements as of March 31, 2019 and for the three-month periods ended March 31, 2019 and 2018. The results of operations for the three-month period ended March 31, 2019 are not necessarily indicative of the results to be expected for the full year. The preparation of the unaudited Consolidated Financial Statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities at the date of the unaudited Consolidated Financial Statements and the reported amounts of revenue and expenses during the period. Actual results may differ from the estimates used in preparing the unaudited Consolidated Financial Statements. Note 2 of Notes to Consolidated Financial Statements included in the Company's Annual Report on Form 10-K for the year ended December 31, 2018 describes the most significant accounting policies used in the preparation of the unaudited Consolidated Financial Statements. There have been no significant changes in the Company's assumptions regarding significant accounting estimates and policies, except as disclosed in Note 4, during the three-month period ended March 31, 2019.
PacifiCorp [Member]
Segment Reporting Information [Line Items]
General/Organization and Operations	General PacifiCorp, which includes PacifiCorp and its subsidiaries, is a United States regulated electric utility company serving retail customers, including residential, commercial, industrial, irrigation and other customers in portions of Utah, Oregon, Wyoming, Washington, Idaho and California. PacifiCorp owns, or has interests in, a number of thermal, hydroelectric, wind-powered and geothermal generating facilities, as well as electric transmission and distribution assets. PacifiCorp also buys and sells electricity on the wholesale market with other utilities, energy marketing companies, financial institutions and other market participants. PacifiCorp is subject to comprehensive state and federal regulation. PacifiCorp's subsidiaries support its electric utility operations by providing coal mining services. PacifiCorp is an indirect subsidiary of Berkshire Hathaway Energy Company ("BHE"), a holding company based in Des Moines, Iowa that owns subsidiaries principally engaged in energy businesses. BHE is a consolidated subsidiary of Berkshire Hathaway Inc. ("Berkshire Hathaway"). The unaudited Consolidated Financial Statements have been prepared in accordance with accounting principles generally accepted in the United States of America ("GAAP") for interim financial information and the United States Securities and Exchange Commission's rules and regulations for Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the disclosures required by GAAP for annual financial statements. Management believes the unaudited Consolidated Financial Statements contain all adjustments (consisting only of normal recurring adjustments) considered necessary for the fair presentation of the unaudited Consolidated Financial Statements as of March 31, 2019 and for the three-month periods ended March 31, 2019 and 2018. The Consolidated Statements of Comprehensive Income have been omitted as net income equals comprehensive income for the three-month periods ended March 31, 2019 and 2018. The results of operations for the three-month periods ended March 31, 2019 and 2018 are not necessarily indicative of the results to be expected for the full year. The preparation of the unaudited Consolidated Financial Statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities at the date of the unaudited Consolidated Financial Statements and the reported amounts of revenue and expenses during the period. Actual results may differ from the estimates used in preparing the unaudited Consolidated Financial Statements. Note 2 of Notes to Consolidated Financial Statements included in PacifiCorp's Annual Report on Form 10-K for the year ended December 31, 2018 describes the most significant accounting policies used in the preparation of the unaudited Consolidated Financial Statements. There have been no significant changes in PacifiCorp's assumptions regarding significant accounting estimates and policies, except as disclosed in Note 4, during the three-month period ended March 31, 2019.
MidAmerican Energy Company [Member]
Segment Reporting Information [Line Items]
General/Organization and Operations	General MidAmerican Energy Company ("MidAmerican Energy") is a public utility with electric and natural gas operations and is the principal subsidiary of MHC Inc. ("MHC"). MHC is a holding company that conducts no business other than the ownership of its subsidiaries and related corporate services. MHC's nonregulated subsidiaries include Midwest Capital Group, Inc. and MEC Construction Services Co. MHC is the direct, wholly owned subsidiary of MidAmerican Funding, LLC ("MidAmerican Funding"), which is an Iowa limited liability company with Berkshire Hathaway Energy Company ("BHE") as its sole member. BHE is a holding company based in Des Moines, Iowa that owns subsidiaries principally engaged in energy businesses. BHE is a consolidated subsidiary of Berkshire Hathaway Inc. ("Berkshire Hathaway"). The unaudited Financial Statements have been prepared in accordance with accounting principles generally accepted in the United States of America ("GAAP") for interim financial information and the United States Securities and Exchange Commission's rules and regulations for Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the disclosures required by GAAP for annual financial statements. Management believes the unaudited Financial Statements contain all adjustments (consisting only of normal recurring adjustments) considered necessary for the fair presentation of the unaudited Financial Statements as of March 31, 2019, and for the three-month periods ended March 31, 2019 and 2018. The Statements of Comprehensive Income have been omitted as net income equals comprehensive income for the three-month periods ended March 31, 2019 and 2018. The results of operations for the three-month periods ended March 31, 2019, are not necessarily indicative of the results to be expected for the full year. The preparation of the unaudited Financial Statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities at the date of the unaudited Financial Statements and the reported amounts of revenue and expenses during the period. Actual results may differ from the estimates used in preparing the unaudited Financial Statements. Note 2 of Notes to Financial Statements included in MidAmerican Energy's Annual Report on Form 10-K for the year ended December 31, 2018, describes the most significant accounting policies used in the preparation of the unaudited Financial Statements. There have been no significant changes in MidAmerican Energy's assumptions regarding significant accounting estimates and policies during the three-month period ended March 31, 2019.
MidAmerican Funding, LLC and Subsidiaries [Domain]
Segment Reporting Information [Line Items]
General/Organization and Operations	General MidAmerican Funding, LLC ("MidAmerican Funding") is an Iowa limited liability company with Berkshire Hathaway Energy Company ("BHE") as its sole member. BHE is a holding company based in Des Moines, Iowa that owns subsidiaries principally engaged in energy businesses. BHE is a consolidated subsidiary of Berkshire Hathaway Inc. ("Berkshire Hathaway"). MidAmerican Funding's direct, wholly owned subsidiary is MHC Inc. ("MHC"), which constitutes substantially all of MidAmerican Funding's assets, liabilities and business activities except those related to MidAmerican Funding's long-term debt securities. MHC conducts no business other than the ownership of its subsidiaries and related corporate services. MHC's principal subsidiary is MidAmerican Energy Company ("MidAmerican Energy"), a public utility with electric and natural gas operations. Direct, wholly owned nonregulated subsidiaries of MHC are Midwest Capital Group, Inc. and MEC Construction Services Co. The unaudited Consolidated Financial Statements have been prepared in accordance with accounting principles generally accepted in the United States of America ("GAAP") for interim financial information and the United States Securities and Exchange Commission's rules and regulations for Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the disclosures required by GAAP for annual financial statements. Management believes the unaudited Consolidated Financial Statements contain all adjustments (consisting only of normal recurring adjustments) considered necessary for the fair presentation of the unaudited Consolidated Financial Statements as of March 31, 2019, and for the three-month periods ended March 31, 2019 and 2018. The Consolidated Statements of Comprehensive Income have been omitted as net income equals comprehensive income for the three-month periods ended March 31, 2019 and 2018. The results of operations for the three-month periods ended March 31, 2019, are not necessarily indicative of the results to be expected for the full year. The preparation of the unaudited Consolidated Financial Statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities at the date of the unaudited Consolidated Financial Statements and the reported amounts of revenue and expenses during the period. Actual results may differ from the estimates used in preparing the unaudited Consolidated Financial Statements. Note 2 of Notes to Consolidated Financial Statements included in MidAmerican Funding's Annual Report on Form 10-K for the year ended December 31, 2018, describes the most significant accounting policies used in the preparation of the unaudited Consolidated Financial Statements. There have been no significant changes in MidAmerican Funding's assumptions regarding significant accounting estimates and policies during the three-month period ended March 31, 2019.
Nevada Power Company [Member]
Segment Reporting Information [Line Items]
General/Organization and Operations	General Nevada Power Company, together with its subsidiaries ("Nevada Power"), is a wholly owned subsidiary of NV Energy, Inc. ("NV Energy"), a holding company that also owns Sierra Pacific Power Company ("Sierra Pacific") and certain other subsidiaries. Nevada Power is a United States regulated electric utility company serving retail customers, including residential, commercial and industrial customers, primarily in the Las Vegas, North Las Vegas, Henderson and adjoining areas. NV Energy is an indirect wholly owned subsidiary of Berkshire Hathaway Energy Company ("BHE"). BHE is a holding company based in Des Moines, Iowa that owns subsidiaries principally engaged in energy businesses. BHE is a consolidated subsidiary of Berkshire Hathaway Inc. ("Berkshire Hathaway"). The unaudited Consolidated Financial Statements have been prepared in accordance with accounting principles generally accepted in the United States of America ("GAAP") for interim financial information and the United States Securities and Exchange Commission's rules and regulations for Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the disclosures required by GAAP for annual financial statements. Management believes the unaudited Consolidated Financial Statements contain all adjustments (consisting only of normal recurring adjustments) considered necessary for the fair presentation of the unaudited Consolidated Financial Statements as of March 31, 2019 and for the three-month periods ended March 31, 2019 and 2018. The Consolidated Statements of Comprehensive Income have been omitted as net income equals comprehensive income for the three-month periods ended March 31, 2019 and 2018. The results of operations for the three-month period ended March 31, 2019 are not necessarily indicative of the results to be expected for the full year. The preparation of the unaudited Consolidated Financial Statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities at the date of the unaudited Consolidated Financial Statements and the reported amounts of revenue and expenses during the period. Actual results may differ from the estimates used in preparing the unaudited Consolidated Financial Statements. Note 2 of Notes to Consolidated Financial Statements included in Nevada Power's Annual Report on Form 10-K for the year ended December 31, 2018 describes the most significant accounting policies used in the preparation of the unaudited Consolidated Financial Statements. There have been no significant changes in Nevada Power's assumptions regarding significant accounting estimates and policies, except as disclosed in Note 4, during the three-month period ended March 31, 2019.
Sierra Pacific Power Company [Member]
Segment Reporting Information [Line Items]
General/Organization and Operations	General Sierra Pacific Power Company ("Sierra Pacific"), is a wholly owned subsidiary of NV Energy, Inc. ("NV Energy"), a holding company that also owns Nevada Power Company ("Nevada Power") and certain other subsidiaries. Sierra Pacific is a United States regulated electric utility company serving retail customers, including residential, commercial and industrial customers and regulated retail natural gas customers primarily in northern Nevada. NV Energy is an indirect wholly owned subsidiary of Berkshire Hathaway Energy Company ("BHE"). BHE is a holding company based in Des Moines, Iowa that owns subsidiaries principally engaged in energy businesses. BHE is a consolidated subsidiary of Berkshire Hathaway Inc. ("Berkshire Hathaway"). The unaudited Financial Statements have been prepared in accordance with accounting principles generally accepted in the United States of America ("GAAP") for interim financial information and the United States Securities and Exchange Commission's rules and regulations for Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the disclosures required by GAAP for annual financial statements. Management believes the unaudited Financial Statements contain all adjustments (consisting only of normal recurring adjustments) considered necessary for the fair presentation of the unaudited Financial Statements as of March 31, 2019 and for the three-month periods ended March 31, 2019 and 2018. The Statements of Comprehensive Income have been omitted as net income equals comprehensive income for the three-month periods ended March 31, 2019 and 2018. The results of operations for the three-month period ended March 31, 2019 are not necessarily indicative of the results to be expected for the full year. The preparation of the unaudited Financial Statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities at the date of the unaudited Financial Statements and the reported amounts of revenue and expenses during the period. Actual results may differ from the estimates used in preparing the unaudited Financial Statements. Note 2 of Notes to Financial Statements included in Sierra Pacific's Annual Report on Form 10-K for the year ended December 31, 2018 describes the most significant accounting policies used in the preparation of the unaudited Financial Statements. There have been no significant changes in Sierra Pacific's assumptions regarding significant accounting estimates and policies, except as disclosed in Note 4, during the three-month period ended March 31, 2019.

XML 70 R34.htm IDEA: XBRL DOCUMENT

New Accounting Pronouncements	3 Months Ended
New Accounting Pronouncements	Mar. 31, 2019
MidAmerican Energy Company [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Leases of Lessee Disclosure [Text Block]	Leases In February 2016, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") No. 2016-02, which creates FASB Accounting Standards Codification ("ASC") Topic 842, "Leases" and supersedes Topic 840 "Leases." This guidance increases transparency and comparability among entities by recording lease assets and lease liabilities on the balance sheet and disclosing key information about leasing arrangements. A lessee should recognize on the balance sheet a liability to make lease payments (the lease liability) and a right-of-use asset representing its right to use the underlying asset for the lease term. The recognition, measurement, and presentation of expenses and cash flows arising from a lease by a lessee have not significantly changed from previous guidance. Following the issuance of ASU No. 2016-02, the FASB issued several ASUs that clarified the implementation guidance for ASU No. 2016-02 but did not change the core principle of the guidance. MidAmerican Energy adopted this guidance for all applicable contracts in-effect as of January 1, 2019 under a modified retrospective method, and the adoption did not have a cumulative effect impact at the date of initial adoption nor a material impact on MidAmerican Energy's Financial Statements and disclosures included within Notes to Financial Statements.
MidAmerican Funding, LLC and Subsidiaries [Domain]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Leases of Lessee Disclosure [Text Block]	Leases Refer to Note 4 of MidAmerican Energy's Notes to Financial Statements.

XML 71 R35.htm IDEA: XBRL DOCUMENT

Investments and Restricted Cash and Investments

3 Months Ended

Mar. 31, 2019

Investments and Restricted Cash and Investments

Investments and Restricted Cash and Cash Equivalents and Investments

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



	As of
	March 31,		December 31,
	2019		2018
Investments:
BYD Company Limited common stock	$	1,356	$	1,435
Rabbi trusts	394		371
Other	180		168
Total investments	1,930		1,974

Equity method investments:
BHE Renewables tax equity investments	1,627		1,661
Electric Transmission Texas, LLC	529		527
Bridger Coal Company	97		99
Other	158		153
Total equity method investments	2,411		2,440

Restricted cash and cash equivalents and investments:
Quad Cities Station nuclear decommissioning trust funds	545		504
Restricted cash and cash equivalents	196		256
Total restricted cash and cash equivalents and investments	741		760

Total investments and restricted cash and cash equivalents and investments	$	5,082	$	5,174

Reflected as:
Current assets	$	205	$	271
Noncurrent assets	4,877		4,903
Total investments and restricted cash and cash equivalents and investments	$	5,082	$	5,174

Investments

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



	Three-Month Periods
	Ended March 31,
	2019			2018
Unrealized losses recognized on marketable securities still held at the reporting date	$	(68	)	$	(211	)
Net gains recognized on marketable securities sold during the period	—			2
Losses on marketable securities, net	$	(68	)	$	(209	)

Cash and Cash Equivalents and Restricted Cash and Cash Equivalents



	As of
	March 31,		December 31,
	2019		2018
Cash and cash equivalents	$	1,661	$	627
Restricted cash and cash equivalents	181		227
Investments and restricted cash and cash equivalents and investments	15		29
Total cash and cash equivalents and restricted cash and cash equivalents	$	1,857	$	883

XML 72 R36.htm IDEA: XBRL DOCUMENT

Property, Plant and Equipment, Net

3 Months Ended

Mar. 31, 2019

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



		As of
	Depreciable	March 31,			December 31,
	Life	2019			2018
Regulated assets:
Utility generation, transmission and distribution systems	5-80 years	$	77,659		$	76,707
Interstate natural gas pipeline assets	3-80 years	7,547			7,524
		85,206			84,231
Accumulated depreciation and amortization		(26,253		)	(25,894		)
Regulated assets, net		58,953			58,337

Nonregulated assets:
Independent power plants	5-30 years	6,844			6,826
Other assets	3-30 years	1,474			1,424
		8,318			8,250
Accumulated depreciation and amortization		(1,711		)	(1,610		)
Nonregulated assets, net		6,607			6,640

Net operating assets		65,560			64,977
Construction work-in-progress		3,388			3,110
Property, plant and equipment, net		$	68,948		$	68,087

Construction work-in-progress includes $3.2 billion as of March 31, 2019 and $2.9 billion as of December 31, 2018, related to the construction of regulated assets.

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



		As of
		March 31,			December 31,
	Depreciable Life	2019			2018
Utility plant in service, net:
Generation	20-70 years	$	14,092		$	13,727
Transmission	52-75 years	1,946			1,934
Electric distribution	20-75 years	3,732			3,672
Natural gas distribution	29-75 years	1,734			1,724
Utility plant in service		21,504			21,057
Accumulated depreciation and amortization		(6,076		)	(5,941		)
Utility plant in service, net		15,428			15,116
Nonregulated property, net:
Nonregulated property gross	20-50 years	7			7
Accumulated depreciation and amortization		(1		)	(1		)
Nonregulated property, net		6			6
		15,434			15,122
Construction work-in-progress		1,111			1,035
Property, plant and equipment, net		$	16,545		$	16,157

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



		As of
		March 31,			December 31,
	Depreciable Life	2019			2018
Utility Plant:
Utility plant in-service	5-75 years	$	28,455		$	28,399
Accumulated depreciation and amortization		(10,105		)	(10,034		)
Utility plant in-service, net		18,350			18,365
Other non-regulated, net of accumulated depreciation and amortization	47 years	10			10
Plant, net		18,360			18,375
Construction work-in-progress		1,338			1,195
Property, plant and equipment, net		$	19,698		$	19,570

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



		As of
	Depreciable Life	March 31,			December 31,
	Depreciable Life	2019			2018
Utility plant:
Generation	30 - 55 years	$	3,725		$	3,720
Distribution	20 - 65 years	3,436			3,411
Transmission	45 - 70 years	1,441			1,439
General and intangible plant	5 - 65 years	710			716
Utility plant		9,312			9,286
Accumulated depreciation and amortization		(2,995		)	(2,966		)
Utility plant, net		6,317			6,320
Other non-regulated, net of accumulated depreciation and amortization	45 years	1			1
Plant, net		6,318			6,321
Construction work-in-progress		125			97
Property, plant and equipment, net		$	6,443		$	6,418

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



		As of
	Depreciable Life	March 31,			December 31,
	Depreciable Life	2019			2018
Utility plant:
Electric generation	25 - 60 years	$	1,132		$	1,132
Electric distribution	20 - 100 years	1,588			1,568
Electric transmission	50 - 100 years	818			812
Electric general and intangible plant	5 - 70 years	174			185
Natural gas distribution	35 - 70 years	405			403
Natural gas general and intangible plant	5 - 70 years	14			14
Common general	5 - 70 years	318			321
Utility plant		4,449			4,435
Accumulated depreciation and amortization		(1,585		)	(1,583		)
Utility plant, net		2,864			2,852
Other non-regulated, net of accumulated depreciation and amortization	70 years	5			5
Plant, net		2,869			2,857
Construction work-in-progress		96			90
Property, plant and equipment, net		$	2,965		$	2,947

XML 73 R37.htm IDEA: XBRL DOCUMENT

Regulatory Matters	3 Months Ended
Regulatory Matters	Mar. 31, 2019
Nevada Power Company [Member]
Schedule Of Regulatory Assets and Liabilities [Line Items]
Regulatory Matters	Regulatory Matters Deferred Energy Nevada statutes permit regulated utilities to adopt deferred energy accounting procedures. The intent of these procedures is to ease the effect on customers of fluctuations in the cost of purchased natural gas, fuel and electricity and are subject to annual prudency review by the PUCN. Under deferred energy accounting, to the extent actual fuel and purchased power costs exceed fuel and purchased power costs recoverable through current rates that excess is not recorded as a current expense on the Consolidated Statements of Operations but rather is deferred and recorded as a regulatory asset on the Consolidated Balance Sheets. Conversely, a regulatory liability is recorded to the extent fuel and purchased power costs recoverable through current rates exceed actual fuel and purchased power costs. These excess amounts are reflected in quarterly adjustments to rates and recorded as cost of fuel and energy in future time periods. 2017 Tax Reform In February 2018, Nevada Power made a filing with the PUCN proposing a tax rate reduction rider for the lower annual income tax expense anticipated to result from 2017 Tax Reform for 2018 and beyond. In March 2018, the PUCN issued an order approving the rate reduction proposed by Nevada Power. The new rates were effective April 1, 2018. The order extended the procedural schedule to allow parties additional discovery relevant to 2017 Tax Reform and a hearing was held in July 2018. In September 2018, the PUCN issued an order directing Nevada Power to record the amortization of any excess protected accumulated deferred income tax arising from the 2017 Tax Reform as a regulatory liability effective January 1, 2018. Subsequently, Nevada Power filed a petition for reconsideration relating to the amortization of protected excess accumulated deferred income tax balances resulting from the 2017 Tax Reform. In November 2018, the PUCN issued an order granting reconsideration and reaffirming the September 2018 order. In December 2018, Nevada Power filed a petition for judicial review. In January 2019, intervening parties filed statements of intent to participate in the petition for judicial review. Chapter 704B Applications Chapter 704B of the Nevada Revised Statutes allows retail electric customers with an average annual load of one megawatt ("MW") or more to file with the PUCN an application to purchase energy from alternative providers of a new electric resource and become distribution only service customers. On a case-by-case basis, the PUCN will assess the application and may deny or grant the application subject to conditions, including paying an impact fee, paying on-going charges and receiving approval for specific alternative energy providers and terms. The impact fee and on-going charges are assessed to alleviate the burden on other Nevada customers for the applicant's share of previously committed investments and long-term renewable contracts and are set at a level designed such that the remaining customers are not subjected to increased costs. In June 2018, Station Casinos LLC ("Station"), a customer of Nevada Power, filed an application with the PUCN to purchase energy from an alternative provider and become a distribution only service customer of Nevada Power. In October 2018, the PUCN approved an order allowing Station to purchase energy from another energy supplier subject to conditions, including paying an impact fee of $15 million. In November 2018, Station filed a petition for reconsideration with the PUCN to allow Station to pay its share of the Renewable Base Tariff Energy Rate in a single lump sum, receive a credit for a portion of impact fees previously paid by past 704B applicants and receive a credit for a portion of incremental transmission revenue associated with expected sales to others. In December 2018, the PUCN issued an order granting reconsideration and reaffirming the October 2018 order. In February 2019, the PUCN issued an order allowing Station to alter their expected transition date from December 1, 2018 to October 1, 2019.
Sierra Pacific Power Company [Member]
Schedule Of Regulatory Assets and Liabilities [Line Items]
Regulatory Matters	Regulatory Matters Deferred Energy Nevada statutes permit regulated utilities to adopt deferred energy accounting procedures. The intent of these procedures is to ease the effect on customers of fluctuations in the cost of purchased natural gas, fuel and electricity and are subject to annual prudency review by the PUCN. Under deferred energy accounting, to the extent actual fuel and purchased power costs exceed fuel and purchased power costs recoverable through current rates that excess is not recorded as a current expense on the Statements of Operations but rather is deferred and recorded as a regulatory asset on the Balance Sheets. Conversely, a regulatory liability is recorded to the extent fuel and purchased power costs recoverable through current rates exceed actual fuel and purchased power costs. These excess amounts are reflected in quarterly adjustments to rates and recorded as cost of fuel and energy in future time periods. 2017 Tax Reform In February 2018, Sierra Pacific made a filing with the PUCN proposing a tax rate reduction rider for the lower annual income tax expense anticipated to result from 2017 Tax Reform for 2018 and beyond. In March 2018, the PUCN issued an order approving the rate reduction proposed by Sierra Pacific. The new rates were effective April 1, 2018. The order extended the procedural schedule to allow parties additional discovery relevant to 2017 Tax Reform and a hearing was held in July 2018. In September 2018, the PUCN issued an order directing Sierra Pacific to record the amortization of any excess protected accumulated deferred income tax arising from the 2017 Tax Reform as a regulatory liability effective January 1, 2018. Subsequently, Sierra Pacific filed a petition for reconsideration relating to the amortization of protected excess accumulated deferred income tax balances resulting from the 2017 Tax Reform. In November 2018, the PUCN issued an order granting reconsideration and reaffirming the September 2018 order. In December 2018, Sierra Pacific filed a petition for judicial review. In January 2019, intervening parties filed statements of intent to participate in the petition for judicial review. Chapter 704B Applications Chapter 704B of the Nevada Revised Statutes allows retail electric customers with an average annual load of one megawatt ("MW") or more to file with the PUCN an application to purchase energy from alternative providers of a new electric resource and become distribution only service customers. On a case-by-case basis, the PUCN will assess the application and may deny or grant the application subject to conditions, including paying an impact fee, paying on-going charges and receiving approval for specific alternative energy providers and terms. The impact fee and on-going charges are assessed to alleviate the burden on other Nevada customers for the applicant's share of previously committed investments and long-term renewable contracts and are set at a level designed such that the remaining customers are not subjected to increased costs.

XML 74 R38.htm IDEA: XBRL DOCUMENT

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

3 Months Ended

Mar. 31, 2019

Condensed Cash Flow Statements, Captions [Line Items]

Cash and Cash Equivalents and Restricted Cash and Cash Equivalents

Cash equivalents consist of funds invested in money market mutual funds, United States Treasury Bills and other investments with a maturity of three months or less when purchased. Cash and cash equivalents exclude amounts where availability is restricted by legal requirements, loan agreements or other contractual provisions. Restricted cash and cash equivalents as of March 31, 2019 and December 31, 2018, consist of funds restricted by the Public Utilities Commission of Nevada ("PUCN") for a certain renewable energy contract. A reconciliation of cash and cash equivalents and restricted cash and cash equivalents as of March 31, 2019 and December 31, 2018, as presented in the Statements of Cash Flows is outlined below and disaggregated by the line items in which they appear on the Balance Sheets (in millions):



	As of
	March 31,		December 31,
	2019		2018
Cash and cash equivalents	$	62	$	71
Restricted cash and cash equivalents included in other current assets	6		5
Total cash and cash equivalents and restricted cash and cash equivalents	$	68	$	76

Condensed Cash Flow Statements, Captions [Line Items]

Cash and Cash Equivalents and Restricted Cash and Cash Equivalents

Cash equivalents consist of funds invested in money market mutual funds, United States Treasury Bills and other investments with a maturity of three months or less when purchased. Cash and cash equivalents exclude amounts where availability is restricted by legal requirements, loan agreements or other contractual provisions. Restricted cash and cash equivalents as of March 31, 2019 and December 31, 2018, consist of funds restricted by the Public Utilities Commission of Nevada ("PUCN") for a certain renewable energy contract. A reconciliation of cash and cash equivalents and restricted cash and cash equivalents as of March 31, 2019 and December 31, 2018, as presented in the Consolidated Statements of Cash Flows is outlined below and disaggregated by the line items in which they appear on the Consolidated Balance Sheets (in millions):



	As of
	March 31,		December 31,
	2019		2018
Cash and cash equivalents	$	51	$	111
Restricted cash and cash equivalents included in other current assets	11		10
Total cash and cash equivalents and restricted cash and cash equivalents	$	62	$	121

Condensed Cash Flow Statements, Captions [Line Items]

Cash and Cash Equivalents and Restricted Cash and Cash Equivalents

Cash equivalents consist of funds invested in money market mutual funds, United States Treasury Bills and other investments with a maturity of three months or less when purchased. Cash and cash equivalents exclude amounts where availability is restricted by legal requirements, loan agreements or other contractual provisions. Restricted cash and cash equivalents consist substantially of funds representing escrow accounts for disputes, vendor retention, custodial and nuclear decommissioning funds. Restricted amounts are included in other current assets and other assets on the Consolidated Balance Sheets. A reconciliation of cash and cash equivalents and restricted cash and cash equivalents as of March 31, 2019 and December 31, 2018, as presented in the Consolidated Statements of Cash Flows is outlined below and disaggregated by the line items in which they appear on the Consolidated Balance Sheets (in millions):



	As of
	March 31,		December 31,
	2019		2018
Cash and cash equivalents	$	669	$	77
Restricted cash included in other current assets	13		13
Restricted cash included in other assets	2		2
Total cash and cash equivalents and restricted cash and cash equivalents	$	684	$	92

Condensed Cash Flow Statements, Captions [Line Items]

Cash and Cash Equivalents and Restricted Cash and Cash Equivalents

Cash equivalents consist of funds invested in money market mutual funds, United States Treasury Bills and other investments with a maturity of three months or less when purchased. Cash and cash equivalents exclude amounts where availability is restricted by legal requirements, loan agreements or other contractual provisions. Restricted cash and cash equivalents as of March 31, 2019 and December 31, 2018, consist substantially of funds restricted for the purpose of constructing solid waste facilities under tax-exempt bond obligation agreements. A reconciliation of cash and cash equivalents and restricted cash and cash equivalents as of March 31, 2019 and December 31, 2018, as presented in the Consolidated Statements of Cash Flows is outlined below and disaggregated by the line items in which they appear on the Consolidated Balance Sheets (in millions):



	As of
	March 31		December 31
	2019		2018

Cash and cash equivalents	$	433	$	1
Restricted cash and cash equivalents in other current assets	47		56
Total cash and cash equivalents and restricted cash and cash equivalents	$	480	$	57

Condensed Cash Flow Statements, Captions [Line Items]

Cash and Cash Equivalents and Restricted Cash and Cash Equivalents

Cash equivalents consist of funds invested in money market mutual funds, United States Treasury Bills and other investments with a maturity of three months or less when purchased. Cash and cash equivalents exclude amounts where availability is restricted by legal requirements, loan agreements or other contractual provisions. Restricted cash and cash equivalents as of March 31, 2019 and December 31, 2018, consist substantially of funds restricted for the purpose of constructing solid waste facilities under tax-exempt bond obligation agreements. A reconciliation of cash and cash equivalents and restricted cash and cash equivalents as of March 31, 2019 and December 31, 2018, as presented in the Statements of Cash Flows is outlined below and disaggregated by the line items in which they appear on the Balance Sheets (in millions):



	As of
	March 31,		December 31
	2019		2018

Cash and cash equivalents	$	432	$	—
Restricted cash and cash equivalents in other current assets	47		56
Total cash and cash equivalents and restricted cash and cash equivalents	$	479	$	56

XML 75 R39.htm IDEA: XBRL DOCUMENT

Leases Leases (Notes)

3 Months Ended

Mar. 31, 2019

Leases

Adoption

Leases

Lessee



	As of
	March 31,
	2019
Right-of-use assets:
Operating leases	$	544
Finance leases	509
Total right-of-use assets	$	1,053

Lease liabilities:
Operating leases	$	586
Finance leases	522
Total lease liabilities	$	1,108

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



	Three-Month Period
	Ended March 31,
	2019

Variable	$	144
Operating	41
Finance:
Amortization	4
Interest	11
Short-term	1
Total lease costs	$	201

Weighted-average remaining lease term (years):
Operating leases	7.5
Finance leases	29.5

Weighted-average discount rate:
Operating leases	5.3		%
Finance leases	8.7		%

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



	Three-Month Period
	Ended March 31,
	2019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$	(37	)
Operating cash flows from finance leases	(12		)
Financing cash flows from finance leases	(5		)
Right-of-use assets obtained in exchange for lease liabilities:
Operating leases	$	12
Finance leases	1

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



	March 31, 2019									December 31, 2018⁽¹⁾
	Operating			Finance			Total			Operating		Capital		Total
2019	$	115		$	53		$	168		$	147	$	69	$	216
2020	138			68			206			128		68		196
2021	116			74			190			110		73		183
2022	92			67			159			87		67		154
2023	66			56			122			61		56		117
Thereafter	198			775			973			159		772		931
Total undiscounted lease payments	725			1,093			1,818			$	692	$	1,105	$	1,797
Less - amounts representing interest	(139		)	(571		)	(710		)
Lease liabilities	$	586		$	522		$	1,108

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

Leases

Adoption

Leases

Lessee



	As of
	March 31,
	2019
Right-of-use assets:
Operating leases	$	544
Finance leases	509
Total right-of-use assets	$	1,053

Lease liabilities:
Operating leases	$	586
Finance leases	522
Total lease liabilities	$	1,108

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



	Three-Month Period
	Ended March 31,
	2019

Variable	$	144
Operating	41
Finance:
Amortization	4
Interest	11
Short-term	1
Total lease costs	$	201

Weighted-average remaining lease term (years):
Operating leases	7.5
Finance leases	29.5

Weighted-average discount rate:
Operating leases	5.3		%
Finance leases	8.7		%

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



	Three-Month Period
	Ended March 31,
	2019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$	(37	)
Operating cash flows from finance leases	(12		)
Financing cash flows from finance leases	(5		)
Right-of-use assets obtained in exchange for lease liabilities:
Operating leases	$	12
Finance leases	1

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



	March 31, 2019									December 31, 2018⁽¹⁾
	Operating			Finance			Total			Operating		Capital		Total
2019	$	115		$	53		$	168		$	147	$	69	$	216
2020	138			68			206			128		68		196
2021	116			74			190			110		73		183
2022	92			67			159			87		67		154
2023	66			56			122			61		56		117
Thereafter	198			775			973			159		772		931
Total undiscounted lease payments	725			1,093			1,818			$	692	$	1,105	$	1,797
Less - amounts representing interest	(139		)	(571		)	(710		)
Lease liabilities	$	586		$	522		$	1,108

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

Leases

Adoption

In February 2016, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") No. 2016-02, which creates FASB Accounting Standards Codification ("ASC") Topic 842, "Leases" and supersedes Topic 840 "Leases." This guidance increases transparency and comparability among entities by recording lease assets and lease liabilities on the balance sheet and disclosing key information about leasing arrangements. A lessee should recognize on the balance sheet a liability to make lease payments (the lease liability) and a right-of-use asset representing its right to use the underlying asset for the lease term. The recognition, measurement and presentation of expenses and cash flows arising from a lease by a lessee have not significantly changed from previous guidance. Following the issuance of ASU No. 2016-02, the FASB issued several ASUs that clarified the implementation guidance for ASU No. 2016-02 but did not change the core principle of the guidance. PacifiCorp adopted this guidance for all applicable contracts in effect as of January 1, 2019 under a modified retrospective method and the adoption did not have a cumulative effect impact at the date of initial adoption.

Leases

Lessee



	As of
	March 31,
	2019
Right-of-use assets:
Operating leases	$	14
Finance leases	20
Total right-of-use assets	$	34

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

Cash payments associated with operating and finance lease liabilities approximated lease cost. The following table summarizes PacifiCorp's lease costs (in millions):



	Three-Month Period
	Ended March 31,
	2019

Variable	$	9
Operating	1
Finance:
Interest	1
Total lease costs	$	11

Weighted-average remaining lease term (years):
Operating leases	13.6
Finance leases	9.7

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

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



	March 31, 2019									December 31, 2018⁽¹⁾
	Operating			Finance			Total			Operating		Capital		Total
2019	$	2		$	3		$	5		$	3	$	4	$	7
2020	2			3			5			3		4		7
2021	2			7			9			3		7		10
2022	2			3			5			2		3		5
2023	2			2			4			2		2		4
Thereafter	8			16			24			7		16		23
Total undiscounted lease payments	18			34			52			$	20	$	36	$	56
Less - amounts representing interest	(4		)	(14		)	(18		)
Lease liabilities	$	14		$	20		$	34

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

Leases

Adoption

In February 2016, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") No. 2016-02, which creates FASB Accounting Standards Codification ("ASC") Topic 842, "Leases" and supersedes Topic 840 "Leases." This guidance increases transparency and comparability among entities by recording lease assets and lease liabilities on the balance sheet and disclosing key information about leasing arrangements. A lessee should recognize on the balance sheet a liability to make lease payments (the lease liability) and a right-of-use asset representing its right to use the underlying asset for the lease term. The recognition, measurement and presentation of expenses and cash flows arising from a lease by a lessee have not significantly changed from previous guidance. Following the issuance of ASU No. 2016-02, the FASB issued several ASUs that clarified the implementation guidance for ASU No. 2016-02 but did not change the core principle of the guidance. PacifiCorp adopted this guidance for all applicable contracts in effect as of January 1, 2019 under a modified retrospective method and the adoption did not have a cumulative effect impact at the date of initial adoption.

Leases

Lessee



	As of
	March 31,
	2019
Right-of-use assets:
Operating leases	$	14
Finance leases	20
Total right-of-use assets	$	34

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

Cash payments associated with operating and finance lease liabilities approximated lease cost. The following table summarizes PacifiCorp's lease costs (in millions):



	Three-Month Period
	Ended March 31,
	2019

Variable	$	9
Operating	1
Finance:
Interest	1
Total lease costs	$	11

Weighted-average remaining lease term (years):
Operating leases	13.6
Finance leases	9.7

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

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



	March 31, 2019									December 31, 2018⁽¹⁾
	Operating			Finance			Total			Operating		Capital		Total
2019	$	2		$	3		$	5		$	3	$	4	$	7
2020	2			3			5			3		4		7
2021	2			7			9			3		7		10
2022	2			3			5			2		3		5
2023	2			2			4			2		2		4
Thereafter	8			16			24			7		16		23
Total undiscounted lease payments	18			34			52			$	20	$	36	$	56
Less - amounts representing interest	(4		)	(14		)	(18		)
Lease liabilities	$	14		$	20		$	34

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

Leases

Adoption

In February 2016, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") No. 2016-02, which creates FASB Accounting Standards Codification ("ASC") Topic 842, "Leases" and supersedes Topic 840 "Leases." This guidance increases transparency and comparability among entities by recording lease assets and lease liabilities on the balance sheet and disclosing key information about leasing arrangements. A lessee should recognize on the balance sheet a liability to make lease payments (the lease liability) and a right-of-use asset representing its right to use the underlying asset for the lease term. The recognition, measurement, and presentation of expenses and cash flows arising from a lease by a lessee have not significantly changed from previous guidance. Following the issuance of ASU No. 2016-02, the FASB issued several ASUs that clarified the implementation guidance for ASU No. 2016-02 but did not change the core principle of the guidance. Nevada Power adopted this guidance for all applicable contracts in-effect as of January 1, 2019 under a modified retrospective method and the adoption did not have a cumulative-effect impact to the opening balance of retained earnings at the date of initial adoption.

Leases

Lessee



	As of
	March 31,
	2019
Right-of-use assets:
Operating leases	$	15
Finance leases	449
Total right-of-use assets	$	464

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

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



	Three-Month Period
	Ended March 31,
	2019

Variable	$	108
Operating	1
Finance:
Amortization	3
Interest	10
Total lease costs	$	122

Weighted-average remaining lease term (years):
Operating leases	8.1
Finance leases	31.3

Weighted-average discount rate:
Operating leases	4.5		%
Finance leases	8.7		%

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



	Three-Month Period
	Ended March 31,
	2019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$	(1	)
Operating cash flows from finance leases	(11		)
Financing cash flows from finance leases	(3		)
Right-of-use assets obtained in exchange for lease liabilities:
Finance leases	$	1

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



	March 31, 2019									December 31, 2018⁽¹⁾
	Operating			Finance			Total			Operating		Capital		Total
2019	$	2		$	46		$	48		$	3	$	59	$	62
2020	3			58			61			3		59		62
2021	3			62			65			3		61		64
2022	2			60			62			3		60		63
2023	2			50			52			2		50		52
Thereafter	10			711			721			10		709		719
Total undiscounted lease payments	22			987			1,009			$	24	$	998	$	1,022
Less - amounts representing interest	(4		)	(525		)	(529		)
Lease liabilities	$	18		$	462		$	480

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

Leases

Adoption

In February 2016, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") No. 2016-02, which creates FASB Accounting Standards Codification ("ASC") Topic 842, "Leases" and supersedes Topic 840 "Leases." This guidance increases transparency and comparability among entities by recording lease assets and lease liabilities on the balance sheet and disclosing key information about leasing arrangements. A lessee should recognize on the balance sheet a liability to make lease payments (the lease liability) and a right-of-use asset representing its right to use the underlying asset for the lease term. The recognition, measurement, and presentation of expenses and cash flows arising from a lease by a lessee have not significantly changed from previous guidance. Following the issuance of ASU No. 2016-02, the FASB issued several ASUs that clarified the implementation guidance for ASU No. 2016-02 but did not change the core principle of the guidance. Nevada Power adopted this guidance for all applicable contracts in-effect as of January 1, 2019 under a modified retrospective method and the adoption did not have a cumulative-effect impact to the opening balance of retained earnings at the date of initial adoption.

Leases

Lessee



	As of
	March 31,
	2019
Right-of-use assets:
Operating leases	$	15
Finance leases	449
Total right-of-use assets	$	464

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

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



	Three-Month Period
	Ended March 31,
	2019

Variable	$	108
Operating	1
Finance:
Amortization	3
Interest	10
Total lease costs	$	122

Weighted-average remaining lease term (years):
Operating leases	8.1
Finance leases	31.3

Weighted-average discount rate:
Operating leases	4.5		%
Finance leases	8.7		%

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



	Three-Month Period
	Ended March 31,
	2019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$	(1	)
Operating cash flows from finance leases	(11		)
Financing cash flows from finance leases	(3		)
Right-of-use assets obtained in exchange for lease liabilities:
Finance leases	$	1

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



	March 31, 2019									December 31, 2018⁽¹⁾
	Operating			Finance			Total			Operating		Capital		Total
2019	$	2		$	46		$	48		$	3	$	59	$	62
2020	3			58			61			3		59		62
2021	3			62			65			3		61		64
2022	2			60			62			3		60		63
2023	2			50			52			2		50		52
Thereafter	10			711			721			10		709		719
Total undiscounted lease payments	22			987			1,009			$	24	$	998	$	1,022
Less - amounts representing interest	(4		)	(525		)	(529		)
Lease liabilities	$	18		$	462		$	480

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

Leases

Adoption

In February 2016, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") No. 2016-02, which creates FASB Accounting Standards Codification ("ASC") Topic 842, "Leases" and supersedes Topic 840 "Leases." This guidance increases transparency and comparability among entities by recording lease assets and lease liabilities on the balance sheet and disclosing key information about leasing arrangements. A lessee should recognize on the balance sheet a liability to make lease payments (the lease liability) and a right-of-use asset representing its right to use the underlying asset for the lease term. The recognition, measurement, and presentation of expenses and cash flows arising from a lease by a lessee have not significantly changed from previous guidance. Following the issuance of ASU No. 2016-02, the FASB issued several ASUs that clarified the implementation guidance for ASU No. 2016-02 but did not change the core principle of the guidance. Sierra Pacific adopted this guidance for all applicable contracts in-effect as of January 1, 2019 under a modified retrospective method and the adoption did not have a cumulative-effect impact at the date of initial adoption.

Leases

Lessee



	As of
	March 31,
	2019
Right-of-use assets:
Operating leases	$	19
Finance leases	38
Total right-of-use assets	$	57

Lease liabilities:
Operating leases	$	19
Finance leases	39
Total lease liabilities	$	58

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



	Three-Month Period
	Ended March 31,
	2019

Variable	$	15
Operating	—
Finance:
Amortization	1
Interest	1
Total lease costs	$	17

Weighted-average remaining lease term (years):
Operating leases	25.7
Finance leases	23.8

Weighted-average discount rate:
Operating leases	4.9		%
Finance leases	7.3		%

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



	Three-Month Period
	Ended March 31,
	2019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from finance leases	$	(1	)

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



	March 31, 2019									December 31, 2018⁽¹⁾
	Operating			Finance			Total			Operating		Capital		Total
2019	$	2		$	4		$	6		$	2	$	6	$	8
2020	2			5			7			2		4		6
2021	2			5			7			2		5		7
2022	1			4			5			1		4		5
2023	1			4			5			1		4		5
Thereafter	27			47			74			28		47		75
Total undiscounted lease payments	35			69			104			$	36	$	70	$	106
Less - amounts representing interest	(16		)	(30		)	(46		)
Lease liabilities	$	19		$	39		$	58

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

Schedule of Effective Income Tax Rate Reconciliation [Line Items]

Leases

Adoption

In February 2016, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") No. 2016-02, which creates FASB Accounting Standards Codification ("ASC") Topic 842, "Leases" and supersedes Topic 840 "Leases." This guidance increases transparency and comparability among entities by recording lease assets and lease liabilities on the balance sheet and disclosing key information about leasing arrangements. A lessee should recognize on the balance sheet a liability to make lease payments (the lease liability) and a right-of-use asset representing its right to use the underlying asset for the lease term. The recognition, measurement, and presentation of expenses and cash flows arising from a lease by a lessee have not significantly changed from previous guidance. Following the issuance of ASU No. 2016-02, the FASB issued several ASUs that clarified the implementation guidance for ASU No. 2016-02 but did not change the core principle of the guidance. Sierra Pacific adopted this guidance for all applicable contracts in-effect as of January 1, 2019 under a modified retrospective method and the adoption did not have a cumulative-effect impact at the date of initial adoption.

Leases

Lessee



	As of
	March 31,
	2019
Right-of-use assets:
Operating leases	$	19
Finance leases	38
Total right-of-use assets	$	57

Lease liabilities:
Operating leases	$	19
Finance leases	39
Total lease liabilities	$	58

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



	Three-Month Period
	Ended March 31,
	2019

Variable	$	15
Operating	—
Finance:
Amortization	1
Interest	1
Total lease costs	$	17

Weighted-average remaining lease term (years):
Operating leases	25.7
Finance leases	23.8

Weighted-average discount rate:
Operating leases	4.9		%
Finance leases	7.3		%

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



	Three-Month Period
	Ended March 31,
	2019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from finance leases	$	(1	)

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



	March 31, 2019									December 31, 2018⁽¹⁾
	Operating			Finance			Total			Operating		Capital		Total
2019	$	2		$	4		$	6		$	2	$	6	$	8
2020	2			5			7			2		4		6
2021	2			5			7			2		5		7
2022	1			4			5			1		4		5
2023	1			4			5			1		4		5
Thereafter	27			47			74			28		47		75
Total undiscounted lease payments	35			69			104			$	36	$	70	$	106
Less - amounts representing interest	(16		)	(30		)	(46		)
Lease liabilities	$	19		$	39		$	58

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

XML 76 R40.htm IDEA: XBRL DOCUMENT

Recent Financing Transactions	3 Months Ended
Recent Financing Transactions	Mar. 31, 2019
Debt Instrument [Line Items]
Recent Financing Transactions	Recent Financing Transactions Long-Term Debt In March 2019, PacifiCorp issued $400 million of its 3.50% First Mortgage Bonds due June 2029 and $600 million of its 4.15% First Mortgage Bonds due February 2050. PacifiCorp used a portion of the net proceeds to repay short-term debt partially incurred in January 2019 to repay all of PacifiCorp's $350 million 5.50% First Mortgage Bonds due January 2019 and intends to use the remaining net proceeds to fund capital expenditures and for general corporate purposes. In February 2019, MidAmerican Energy redeemed $500 million of its 2.40% First Mortgage Bonds due in March 2019 at a redemption price of 100% of the principal amount plus accrued interest. In January 2019, Nevada Power issued $500 million of its 3.70% General and Refunding Mortgage Notes, Series CC, due May 2029. Nevada Power used the net proceeds to repay all of Nevada Power's $500 million 7.125% General and Refunding Mortgage Notes, Series V, maturing in March 2019. In January 2019, MidAmerican Energy issued $600 million of its 3.65% First Mortgage Bonds due April 2029 and $900 million of its 4.25% First Mortgage Bonds due July 2049. An amount equal to the net proceeds was used to finance capital expenditures, disbursed during the period from November 1, 2017 to December 14, 2018, with respect to investments in MidAmerican Energy's 2,000-megawatt (nameplate capacity) Wind XI project, MidAmerican Energy's 591-megawatt (nameplate capacity) Wind XII project and the repowering of certain of MidAmerican Energy's existing wind facilities, which were previously financed with MidAmerican Energy's general funds.
Nevada Power Company [Member]
Debt Instrument [Line Items]
Recent Financing Transactions	Recent Financing Transactions Long-Term Debt In January 2019, Nevada Power issued $500 million of its 3.70% General and Refunding Mortgage Notes, Series CC, due May 2029. Nevada Power used the net proceeds to repay all of Nevada Power's $500 million 7.125% General and Refunding Mortgage Notes, Series V, maturing in March 2019.
PacifiCorp [Member]
Debt Instrument [Line Items]
Recent Financing Transactions	Recent Financing Transactions Long-Term Debt In March 2019, PacifiCorp issued $400 million of its 3.50% First Mortgage Bonds due June 2029 and $600 million of its 4.15% First Mortgage Bonds due February 2050. PacifiCorp used a portion of the net proceeds to repay short-term debt that was partially incurred in January 2019 to repay all of PacifiCorp's $350 million 5.50% First Mortgage Bonds due January 2019 and intends to use the remaining net proceeds to fund capital expenditures and for general corporate purposes. Credit Facilities In March 2019, PacifiCorp completed a re-offering of variable rate tax-exempt bond obligations totaling $168 million, involving the cancellation, at PacifiCorp's request, of $170 million of letters of credit support by the issuing banks. As a result, PacifiCorp's credit facility support for outstanding variable rate tax-exempt bond obligations increased by $168 million.
MidAmerican Energy Company [Member]
Debt Instrument [Line Items]
Recent Financing Transactions	Recent Financing Transactions Long-Term Debt In January 2019, MidAmerican Energy issued $600 million of its 3.65% First Mortgage Bonds due April 2029 and $900 million of its 4.25% First Mortgage Bonds due July 2049. An amount equal to the net proceeds was used to finance capital expenditures, disbursed during the period from November 1, 2017 to December 14, 2018, with respect to investments in MidAmerican Energy's 2,000-megawatt (nameplate capacity) Wind XI project, MidAmerican Energy's 591-megawatt (nameplate capacity) Wind XII project and the repowering of certain of MidAmerican Energy's existing wind facilities, which were previously financed with MidAmerican Energy's general funds. In February 2019, MidAmerican Energy redeemed $500 million of its 2.40% First Mortgage Bonds due in March 2019 at a redemption price of 100% of the principal amount plus accrued interest.
MidAmerican Funding, LLC and Subsidiaries [Domain]
Debt Instrument [Line Items]
Recent Financing Transactions	Recent Financing Transactions Refer to Note 5 of MidAmerican Energy's Notes to Financial Statements.
Sierra Pacific Power Company [Member]
Debt Instrument [Line Items]
Recent Financing Transactions	Recent Financing Transactions Long-Term Debt In April 2019, Sierra Pacific purchased the following series of bonds that were held by the public: $30 million of its variable-rate tax-exempt Water Facilities Refunding Revenue Bonds, Series 2016C, due 2036; $25 million of its variable-rate tax-exempt Water Facilities Refunding Revenue Bonds, Series 2016D, due 2036; and $25 million of its variable-rate tax-exempt Water Facilities Refunding Revenue Bonds, Series 2016E, due 2036. Sierra Pacific purchased the Series 2016C, Series 2016D and Series 2016E bonds as required by the bond indentures. In April 2019, Sierra Pacific entered into a re-offering of the following series of bonds: $30 million of its variable-rate tax-exempt Pollution Control Refunding Revenue Bonds, Series 2016B, due 2029; the Series 2016D bonds; the Series 2016E bonds; $75 million of its variable-rate tax-exempt Water Facilities Refunding Revenue Bonds, Series 2016F, due 2036; and $20 million of its variable-rate tax-exempt Water Facilities Refunding Revenue Bonds, Series 2016G, due 2036. The Series 2016B and Series 2016G bonds were offered at a fixed rate of 1.85%. The Series 2016D, Series 2016E and Series 2016F bonds were offered at a fixed rate of 2.05%. Sierra Pacific previously purchased the Series 2016B, Series 2016F and Series 2016G bonds on their date of issuance to hold for its own account. Sierra Pacific holds the Series 2016C bonds for its own account and potential future outcomes of regulatory proceedings. Sierra Pacific intends to use the net proceeds of the re-offering for general corporate purposes.

XML 77 R41.htm IDEA: XBRL DOCUMENT

Income Taxes

3 Months Ended

Mar. 31, 2019

Income Taxes

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



	Three-Month Periods
	Ended March 31,
	2019		2018

Federal statutory income tax rate	21	%	21	%
Income tax credits	(29	)	(45	)
State income tax, net of federal income tax benefit	(17	)	(30	)
Income tax effect of foreign income	(3	)	(16	)
Effects of ratemaking	(3	)	(8	)
Equity income	(1	)	1
Other, net	2		(1	)
Effective income tax rate	(30	)%	(78	)%

Schedule of Effective Income Tax Rate Reconciliation [Line Items]


	Income Taxes

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



	Three-Month Periods
	Ended March 31,
	2019		2018

Federal statutory income tax rate	21	%	21	%
State income tax, net of federal income tax benefit	3		4
Federal income tax credits	(4	)	(5	)
Effects of ratemaking	(1	)	(4	)
Other	—		(2	)
Effective income tax rate	19	%	14	%

Schedule of Effective Income Tax Rate Reconciliation [Line Items]

Income Taxes

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



	Three-Month Periods
	Ended March 31,
	2019		2018

Federal statutory income tax rate	21	%	21	%
Effects of ratemaking	—		(5	)
Other	—		(1	)
Effective income tax rate	21	%	15	%

Schedule of Effective Income Tax Rate Reconciliation [Line Items]

Income Taxes

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



	Three-Month Periods
	Ended March 31,
	2019		2018

Federal statutory income tax rate	21	%	21	%
Income tax credits	(113	)	(137	)
State income tax, net of federal income tax benefit	(21	)	(9	)
Effects of ratemaking	(8	)	(18	)
Other, net	(1	)	2
Effective income tax rate	(122	)%	(141	)%

Schedule of Effective Income Tax Rate Reconciliation [Line Items]

Income Taxes

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



	Three-Month Periods
	Ended March 31,
	2019		2018

Federal statutory income tax rate	21	%	21	%
Income tax credits	(118	)	(151	)
State income tax, net of federal income tax benefit	(22	)	(10	)
Effects of ratemaking	(9	)	(20	)
Other, net	(1	)	2
Effective income tax rate	(129	)%	(158	)%

Due to a combination of declines in pre-tax income and increases in production tax credits in recent years and changes in estimates for these values throughout the year, the volatility of the effective tax rate used to determine the recognition of income tax expense each quarter has similarly increased. MidAmerican Energy concluded that, due to such increased volatility, it was no longer able to reasonably estimate an annual effective tax rate for this purpose. Accordingly, beginning January 1, 2019, production tax credits are recognized in the Statement of Operations as they are earned, and excluded in the determination of the effective tax rate used in the recognition of all other income tax expense. Production tax credits recognized in income for the three-month periods ended March 31, 2019 and 2018 were $98 million and $60 million, respectively with $30 million of the difference related to the change in the method of interim recognition in 2019.

Berkshire Hathaway includes BHE and subsidiaries in its United States federal and Iowa state income tax returns. Consistent with established regulatory practice, MidAmerican Funding's and MidAmerican Energy's provisions for income tax have been computed on a stand-alone basis, and substantially all of their currently payable or receivable income tax is remitted to or received from BHE. MidAmerican Funding received net cash payments for income tax from BHE totaling $- million and $14 million for the three-month periods ended March 31, 2019 and 2018, respectively.

XML 78 R42.htm IDEA: XBRL DOCUMENT

Employee Benefit Plans

3 Months Ended

Mar. 31, 2019

Domestic Operations

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



	Three-Month Periods
	Ended March 31,
	2019			2018
Pension:
Service cost	$	4		$	5
Interest cost	27			26
Expected return on plan assets	(38		)	(41		)
Net amortization	9			8
Net periodic benefit cost (credit)	$	2		$	(2	)

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

Foreign Operations

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



	Three-Month Periods
	Ended March 31,
	2019			2018

Service cost	$	4		$	5
Interest cost	13			14
Expected return on plan assets	(25		)	(27		)
Net amortization	9			15
Net periodic benefit cost	$	1		$	7


	Employee Benefit Plans

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



	Three-Month Periods
	Ended March 31,
	2019			2018
Pension:
Service cost	$	—		$	—
Interest cost	11			11
Expected return on plan assets	(17		)	(18		)
Net amortization	3			3
Net periodic benefit credit	$	(3	)	$	(4	)

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

Amounts other than the service cost for pension and other postretirement benefit plans are recorded in Other, net in the Consolidated Statements of Operations. Employer contributions to the pension and other postretirement benefit plans are expected to be $4 million and $- million, respectively, during 2019. As of March 31, 2019, $1 million and $- million of contributions had been made to the pension and other postretirement benefit plans, respectively.

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



	Three-Month Periods
	Ended March 31,
	2019			2018
Pension:
Service cost	$	2		$	2
Interest cost	7			7
Expected return on plan assets	(10		)	(11		)
Net amortization	—			1
Net periodic benefit credit	$	(1	)	$	(1	)

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

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

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



	As of
	March 31,		December 31,
	2019		2018
Qualified Pension Plan -
Other long-term liabilities	$	26	$	26

Non-Qualified Pension Plans:
Other current liabilities	1		1
Other long-term liabilities	9		9

Other Postretirement Plans -
Other long-term liabilities	1		1

Asset Retirement Obligations Disclosure [Line Items]

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



	As of
	March 31,		December 31,
	2019		2018
Qualified Pension Plan -
Other long-term liabilities	$	19	$	19

Non-Qualified Pension Plans:
Other current liabilities	1		1
Other long-term liabilities	7		7

Other Postretirement Plans -
Other long-term liabilities	13		13

XML 79 R43.htm IDEA: XBRL DOCUMENT

Asset Retirement Obligation Asset Retirement Obligations (Notes)

3 Months Ended

Mar. 31, 2019

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

Asset Retirement Obligations

Asset Retirement Obligations Disclosure [Line Items]

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

The following table reconciles the beginning and ending balances of MidAmerican Energy's ARO liabilities for the three-month period ended March 31, 2019 (in millions):



Beginning balance	$	562
Change in estimated costs	234
Accretion	6
Ending balance	$	802

Reflected as:
Other current liabilities	$	67
Asset retirement obligations	735
	$	802

Asset Retirement Obligation Disclosure [Text Block]

Asset Retirement Obligations

In January 2018, MidAmerican Energy completed groundwater testing at its coal combustion residuals ("CCR") surface impoundments. Based on this information, MidAmerican Energy discontinued sending CCR to surface impoundments effective April 2018 and initiated analysis of additional actions to be taken. As a result of that analysis, MidAmerican Energy will remove all CCR material located below the water table and cap the material in such facilities, which is a more extensive closure activity than previously assumed. In the first quarter of 2019, MidAmerican Energy increased by $237 million the asset retirement obligation ("ARO") for the cost of this closure activity. Closure activity on the six existing surface impoundments is estimated to extend through 2023.

The following table presents MidAmerican Energy's ARO liabilities by asset type (in millions):



	As of
	March 31,		December 31,
	2019		2018

Quad Cities Station	$	348	$	345
Fossil-fueled generating facilities	328		93
Wind-powered generating facilities	125		123
Other	1		1
	$	802	$	562

The following table reconciles the beginning and ending balances of MidAmerican Energy's ARO liabilities for the three-month period ended March 31, 2019 (in millions):



Beginning balance	$	562
Change in estimated costs	234
Accretion	6
Ending balance	$	802

Reflected as:
Other current liabilities	$	67
Asset retirement obligations	735
	$	802

Asset Retirement Obligations Disclosure [Line Items]

Asset Retirement Obligation Disclosure [Text Block]

Asset Retirement Obligations

Refer to Note 8 of MidAmerican Energy's Notes to Financial Statements.

XML 80 R44.htm IDEA: XBRL DOCUMENT

Risk Management and Hedging Activities

3 Months Ended

Mar. 31, 2019

Risk Management and Hedging Activities

Derivative [Line Items]


	Risk Management and Hedging Activities

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



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

As of March 31, 2019
Not designated as hedging contracts⁽¹⁾:
Commodity assets	$	37		$	8		$	6		$	1		$	52
Commodity liabilities	(8		)	—			(59		)	(64		)	(131		)
Total	29			8			(53		)	(63		)	(79		)

Total derivatives	29			8			(53		)	(63		)	(79		)
Cash collateral (payable) receivable	(3		)	—			16			39			52
Total derivatives - net basis	$	26		$	8		$	(37	)	$	(24	)	$	(27	)

As of December 31, 2018
Not designated as hedging contracts⁽¹⁾:
Commodity assets	$	36		$	4		$	10		$	1		$	51
Commodity liabilities	(9		)	(1		)	(67		)	(71		)	(148		)
Total	27			3			(57		)	(70		)	(97		)

Total derivatives	27			3			(57		)	(70		)	(97		)
Cash collateral (payable) receivable	(2		)	—			16			45			59
Total derivatives - net basis	$	25		$	3		$	(41	)	$	(25	)	$	(38	)


(1)	PacifiCorp's commodity derivatives are generally included in rates and as of March 31, 2019 and December 31, 2018, a regulatory asset of $78 million and $96 million, respectively, was recorded related to the net derivative liability of $79 million and $97 million, respectively.



	Three-Month Periods
	Ended March 31,
	2019			2018

Beginning balance	$	96		$	101
Changes in fair value	(54		)	28
Net (losses) gains reclassified to operating revenue	(22		)	7
Net gains (losses) reclassified to cost of fuel and energy	58			(14		)
Ending balance	$	78		$	122

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	2019		2018

Electricity sales, net	Megawatt hours	(4	)	(6	)
Natural gas purchases	Decatherms	110		117

Credit Risk

Collateral and Contingent Features

XML 81 R45.htm IDEA: XBRL DOCUMENT

Fair Value Measurements

3 Months Ended

Mar. 31, 2019

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


•	Level 1 — Inputs are unadjusted quoted prices in active markets for identical assets or liabilities that the Company has the ability to access at the measurement date.

•


•	Level 3 — Unobservable inputs reflect the Company's judgments about the assumptions market participants would use in pricing the asset or liability since limited market data exists. The Company develops these inputs based on the best information available, including its own data.

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



	Input Levels for Fair Value Measurements
	Level 1			Level 2			Level 3			Other⁽¹⁾			Total
As of March 31, 2019
Assets:
Commodity derivatives	$	—		$	82		$	100		$	(40	)	$	142
Interest rate derivatives	—			10			19			—			29
Mortgage loans held for sale	—			506			—			—			506
Money market mutual funds⁽²⁾	1,169			—			—			—			1,169
Debt securities:
United States government obligations	190			—			—			—			190
International government obligations	—			4			—			—			4
Corporate obligations	—			47			—			—			47
Municipal obligations	—			2			—			—			2
Agency, asset and mortgage-backed obligations	—			1			—			—			1
Equity securities:
United States companies	292			—			—			—			292
International companies	1,363			—			—			—			1,363
Investment funds	182			—			—			—			182
	$	3,196		$	652		$	119		$	(40	)	$	3,927
Liabilities:
Commodity derivatives	$	—		$	(162	)	$	(14	)	$	96		$	(80	)
Interest rate derivatives	(1		)	(17		)	(1		)	—			(19		)
	$	(1	)	$	(179	)	$	(15	)	$	96		$	(99	)



	Input Levels for Fair Value Measurements
	Level 1			Level 2			Level 3			Other⁽¹⁾			Total
As of December 31, 2018
Assets:
Commodity derivatives	$	1		$	91		$	108		$	(52	)	$	148
Interest rate derivatives	1			13			10			—			24
Mortgage loans held for sale	—			468			—			—			468
Money market mutual funds⁽²⁾	409			—			—			—			409
Debt securities:
United States government obligations	187			—			—			—			187
International government obligations	—			4			—			—			4
Corporate obligations	—			46			—			—			46
Municipal obligations	—			2			—			—			2
Agency, asset and mortgage-backed obligations	—			1			—			—			1
Equity securities:
United States companies	256			—			—			—			256
International companies	1,441			—			—			—			1,441
Investment funds	128			—			—			—			128
	$	2,423		$	625		$	118		$	(52	)	$	3,114
Liabilities:
Commodity derivatives	$	(1	)	$	(180	)	$	(9	)	$	111		$	(79	)
Interest rate derivatives	—			(32		)	—			—			(32		)
	$	(1	)	$	(212	)	$	(9	)	$	111		$	(111	)


(1)	Represents netting under master netting arrangements and a net cash collateral receivable of $56 million and $59 million as of March 31, 2019 and December 31, 2018, respectively.


(2)	Amounts are included in cash and cash equivalents; other current assets; and noncurrent investments and restricted cash and investments on the Consolidated Balance Sheets. The fair value of these money market mutual funds approximates cost.

The following table reconciles the beginning and ending balances of the Company's assets and liabilities measured at fair value on a recurring basis using significant Level 3 inputs (in millions):



	Three-Month Periods
	Ended March 31,
				Interest
	Commodity			Rate
	Derivatives			Derivatives
2019:
Beginning balance	$	99		$	10
Changes included in earnings	(3		)	53
Changes in fair value recognized in net regulatory assets	(11		)	—
Purchases	1			—
Settlements	—			(45		)
Ending balance	$	86		$	18



2018:
Beginning balance	$	94		$	9
Changes included in earnings	—			30
Changes in fair value recognized in OCI	(1		)	—
Changes in fair value recognized in net regulatory assets	(9		)	—
Purchases	1			—
Settlements	(4		)	(23		)
Ending balance	$	81		$	16



	As of March 31, 2019				As of December 31, 2018
	Carrying		Fair		Carrying		Fair
	Value		Value		Value		Value

Long-term debt	$	37,916	$	42,154	$	36,250	$	38,874

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


•	Level 1 — Inputs are unadjusted quoted prices in active markets for identical assets or liabilities that PacifiCorp has the ability to access at the measurement date.

•


•	Level 3 — Unobservable inputs reflect PacifiCorp's judgments about the assumptions market participants would use in pricing the asset or liability since limited market data exists. PacifiCorp develops these inputs based on the best information available, including its own data.

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



	Input Levels for Fair Value Measurements
	Level 1		Level 2			Level 3		Other⁽¹⁾			Total
As of March 31, 2019
Assets:
Commodity derivatives	$	—	$	52		$	—	$	(18	)	$	34
Money market mutual funds⁽²⁾	468		—			—		—			468
Investment funds	24		—			—		—			24
	$	492	$	52		$	—	$	(18	)	$	526

Liabilities - Commodity derivatives	$	—	$	(131	)	$	—	$	70		$	(61	)

As of December 31, 2018
Assets:
Commodity derivatives	$	—	$	51		$	—	$	(23	)	$	28
Money market mutual funds⁽²⁾	69		—			—		—			69
Investment funds	24		—			—		—			24
	$	93	$	51		$	—	$	(23	)	$	121

Liabilities - Commodity derivatives	$	—	$	(148	)	$	—	$	82		$	(66	)


(1)	Represents netting under master netting arrangements and a net cash collateral receivable of $52 million and $59 million as of March 31, 2019 and December 31, 2018, respectively.


(2)	Amounts are included in cash and cash equivalents, other current assets and other assets on the Consolidated Balance Sheets. The fair value of these money market mutual funds approximates cost.

Derivative contracts are recorded on the Consolidated Balance Sheets as either assets or liabilities and are stated at estimated fair value unless they are designated as normal purchases or normal sales and qualify for the exception afforded by GAAP. When available, the fair value of derivative contracts is estimated using unadjusted quoted prices for identical contracts in the market in which PacifiCorp transacts. When quoted prices for identical contracts are not available, PacifiCorp uses forward price curves. Forward price curves represent PacifiCorp's estimates of the prices at which a buyer or seller could contract today for delivery or settlement at future dates. PacifiCorp bases its forward price curves upon market price quotations, when available, or internally developed and commercial models, with internal and external fundamental data inputs. Market price quotations are obtained from independent energy brokers, exchanges, direct communication with market participants and actual transactions executed by PacifiCorp. Market price quotations for certain major electricity and natural gas trading hubs are generally readily obtainable for the first three years; therefore, PacifiCorp's forward price curves for those locations and periods reflect observable market quotes. Market price quotations for other electricity and natural gas trading hubs are not as readily obtainable for the first three years. Given that limited market data exists for these contracts, as well as for those contracts that are not actively traded, PacifiCorp uses forward price curves derived from internal models based on perceived pricing relationships to major trading hubs that are based on unobservable inputs. The estimated fair value of these derivative contracts is a function of underlying forward commodity prices, interest rates, currency rates, related volatility, counterparty creditworthiness and duration of contracts. Refer to Note 8 for further discussion regarding PacifiCorp's risk management and hedging activities.



	As of March 31, 2019				As of December 31, 2018
	Carrying		Fair		Carrying		Fair
	Value		Value		Value		Value

Long-term debt	$	7,656	$	8,763	$	7,015	$	7,833

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

air Value Measurements


•	Level 1 — Inputs are unadjusted quoted prices in active markets for identical assets or liabilities that MidAmerican Energy has the ability to access at the measurement date.

•


•	Level 3 — Unobservable inputs reflect MidAmerican Energy's judgments about the assumptions market participants would use in pricing the asset or liability since limited market data exists. MidAmerican Energy develops these inputs based on the best information available, including its own data.

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



	Input Levels for Fair Value Measurements
	Level 1		Level 2			Level 3			Other⁽¹⁾		Total
As of March 31, 2019:
Assets:
Commodity derivatives	$	—	$	1		$	—		$	—	$	1
Money market mutual funds⁽²⁾	410		—			—			—		410
Debt securities:
United States government obligations	190		—			—			—		190
International government obligations	—		4			—			—		4
Corporate obligations	—		47			—			—		47
Municipal obligations	—		2			—			—		2
Agency, asset and mortgage-backed obligations	—		1			—			—		1
Equity securities:
United States companies	292		—			—			—		292
International companies	7		—			—			—		7
Investment funds	19		—			—			—		19
	$	918	$	55		$	—		$	—	$	973

Liabilities - commodity derivatives	$	—	$	(3	)	$	(1	)	$	1	$	(3	)



	Input Levels for Fair Value Measurements
	Level 1		Level 2			Level 3			Other⁽¹⁾			Total
As of December 31, 2018:
Assets:
Commodity derivatives	$	—	$	4		$	2		$	(3	)	$	3
Money market mutual funds⁽²⁾	2		—			—			—			2
Debt securities:
United States government obligations	187		—			—			—			187
International government obligations	—		4			—			—			4
Corporate obligations	—		46			—			—			46
Municipal obligations	—		2			—			—			2
Agency, asset and mortgage-backed obligations	—		1			—			—			1
Equity securities:
United States companies	256		—			—			—			256
International companies	6		—			—			—			6
Investment funds	10		—			—			—			10
	$	461	$	57		$	2		$	(3	)	$	517

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


(1)	Represents netting under master netting arrangements and a net cash collateral receivable of $1 million and $- million as of March 31, 2019 and December 31, 2018, respectively.


(2)	Amounts are included in cash and cash equivalents and investments and restricted cash and investments on the Balance Sheets. The fair value of these money market mutual funds approximates cost.



	As of March 31, 2019				As of December 31, 2018
	Carrying Value		Fair Value		Carrying Value		Fair Value

Long-term debt	$	6,341	$	6,929	$	5,379	$	5,644

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



	As of March 31, 2019				As of December 31, 2018
	Carrying Value		Fair Value		Carrying Value		Fair Value

Long-term debt	$	6,581	$	7,236	$	5,619	$	5,941

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


•	Level 1 — Inputs are unadjusted quoted prices in active markets for identical assets or liabilities that Nevada Power has the ability to access at the measurement date.

•


•	Level 3 — Unobservable inputs reflect Nevada Power's judgments about the assumptions market participants would use in pricing the asset or liability since limited market data exists. Nevada Power develops these inputs based on the best information available, including its own data.

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



	Input Levels for Fair Value Measurements
	Level 1		Level 2		Level 3			Total
As of March 31, 2019
Assets:
Commodity derivatives	$	—	$	—	$	4		$	4
Money market mutual funds⁽¹⁾	43		—		—			43
Investment funds	2		—		—			2
	$	45	$	—	$	4		$	49

Liabilities - commodity derivatives	$	—	$	—	$	(9	)	$	(9	)

As of December 31, 2018
Assets:
Commodity derivatives	$	—	$	—	$	7		$	7
Money market mutual funds⁽¹⁾	104		—		—			104
Investment funds	1		—		—			1
	$	105	$	—	$	7		$	112

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


(1)	Amounts are included in cash and cash equivalents on the Consolidated Balance Sheets. The fair value of these money market mutual funds approximates cost.

Derivative contracts are recorded on the Consolidated Balance Sheets as either assets or liabilities and are stated at estimated fair value unless they are designated as normal purchases or normal sales and qualify for the exception afforded by GAAP. When available, the fair value of derivative contracts is estimated using unadjusted quoted prices for identical contracts in the market in which Nevada Power transacts. When quoted prices for identical contracts are not available, Nevada Power uses forward price curves. Forward price curves represent Nevada Power's estimates of the prices at which a buyer or seller could contract today for delivery or settlement at future dates. Nevada Power bases its forward price curves upon internally developed models, with internal and external fundamental data inputs. Market price quotations for certain electricity and natural gas trading hubs are not as readily obtainable due to markets that are not active. Given that limited market data exists for these contracts, Nevada Power uses forward price curves derived from internal models based on perceived pricing relationships to major trading hubs that are based on unobservable inputs. The model incorporates a mid-market pricing convention (the mid‑point price between bid and ask prices) as a practical expedient for valuing its assets and liabilities measured and reported at fair value. The determination of the fair value for derivative contracts not only includes counterparty risk, but also the impact of Nevada Power's nonperformance risk on its liabilities, which as of March 31, 2019 and December 31, 2018, had an immaterial impact to the fair value of its derivative contracts. As such, Nevada Power considers its derivative contracts to be valued using Level 3 inputs.



	Three-Month Periods
	Ended March 31,
	2019			2018

Beginning balance	$	3		$	(3	)
Changes in fair value recognized in regulatory assets	(9		)	(5		)
Settlements	1			—
Ending balance	$	(5	)	$	(8	)



	As of March 31, 2019				As of December 31, 2018
	Carrying		Fair		Carrying		Fair
	Value		Value		Value		Value

Long-term debt	$	2,348	$	2,722	$	2,353	$	2,651

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


•	Level 1 — Inputs are unadjusted quoted prices in active markets for identical assets or liabilities that Sierra Pacific has the ability to access at the measurement date.

•


•	Level 3 — Unobservable inputs reflect Sierra Pacific's judgments about the assumptions market participants would use in pricing the asset or liability since limited market data exists. Sierra Pacific develops these inputs based on the best information available, including its own data.

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



	Input Levels for Fair Value Measurements
	Level 1		Level 2		Level 3			Total
As of March 31, 2019
Assets:
Commodity derivatives	$	—	$	—	$	2		$	2
Money market mutual funds⁽¹⁾	34		—		—			34
	$	34	$	—	$	2		$	36

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

As of December 31, 2018
Assets:
Commodity derivatives	$	—	$	—	$	2		$	2
Money market mutual funds⁽¹⁾	45		—		—			45
	$	45	$	—	$	2		$	47


(1)	Amounts are included in cash and cash equivalents on the Balance Sheets. The fair value of these money market mutual funds approximates cost.



	As of March 31, 2019				As of December 31, 2018
	Carrying		Fair		Carrying		Fair
	Value		Value		Value		Value

Long-term debt	$	1,120	$	1,196	$	1,120	$	1,167

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

XML 82 R46.htm IDEA: XBRL DOCUMENT

Commitments and Contingencies	3 Months Ended
Commitments and Contingencies	Mar. 31, 2019
Loss Contingencies [Line Items]
Commitments and Contingencies	Commitments and Contingencies Commitments During the three-month period ended March 31, 2019, PacifiCorp entered into non-cancelable agreements through 2020 totaling $486 million related to repowering certain existing wind facilities in Wyoming and Washington. Easements During the three-month period ended March 31, 2019, MidAmerican Energy entered into non-cancelable easements with minimum payments totaling $197 million through 2059 for land in Iowa on which some of its wind-powered generating facilities will be located. Maintenance and Service Contracts During the three-month period ended March 31, 2019, MidAmerican Energy entered into non-cancelable maintenance and service contracts related to wind-powered generating facilities with minimum payment commitments totaling $301 million through 2029. BHE Renewables' Counterparty Risk On January 29, 2019, PG&E Corporation and Pacific Gas and Electric Company (the "PG&E Utility") (together "PG&E") filed voluntary petitions for relief under chapter 11 of the United States Bankruptcy Code in the United States Bankruptcy Court for the Northern District of California ("PG&E Bankruptcy Filing"). The Company owns 100% of Topaz Solar Farm LLC ("Topaz") and owns a 49% interest in Agua Caliente Solar, LLC ("Agua Caliente"). Topaz is a 550-MW solar photovoltaic electric power generating facility located in California. Topaz sells 100% of its energy, capacity and renewable energy credits generated from the facility to PG&E Utility under a 25-year wholesale PPA that is in effect until October 2039. As of March 31, 2019, the Company's consolidated balance sheet includes $1.1 billion of property, plant and equipment, net and $0.9 billion of non-recourse project debt related to Topaz. Agua Caliente is a 290-MW solar photovoltaic electric power generating facility located in Arizona. Agua Caliente sells 100% of its energy, capacity and renewable energy credits generated from the facility to PG&E Utility under a 25-year wholesale PPA that is in effect until June 2039. As of March 31, 2019, the Company's equity investment in Agua Caliente totals $47 million and the project has $0.8 billion of non-recourse project debt owed to the United States Department of Energy. The PG&E Bankruptcy Filing is an event of default under the Topaz PPA ("PPA Default"). PG&E paid in full the invoices for December deliveries and all amounts invoiced to date for post-petition energy deliveries for both Topaz and Agua Caliente in 2019. PG&E has not paid for the power delivered from January 1 through January 28, 2019. The Company continues to perform on its obligations and deliver renewable energy to the PG&E Utility, and PG&E has publicly stated it will pay suppliers in full under normal terms for post-petition goods and services received. The Company maintains that, in light of the current facts and circumstances, the PPA Default could not reasonably be expected to result in a material adverse effect under the Topaz indenture and, therefore, no default has occurred under the Topaz indenture. The Company believes it is more likely than not that no impairment exists and current debt obligations will be met, as post-petition contractual revenue payments are expected to be paid by PG&E Utility to the Topaz and Agua Caliente projects. The Company will continue to monitor the situation, including continued receipt of future PG&E payments and the future risk of the PPAs being rejected or modified through the bankruptcy process. Legal Matters The Company is party to a variety of legal actions arising out of the normal course of business. Plaintiffs occasionally seek punitive or exemplary damages. The Company does not believe that such normal and routine litigation will have a material impact on its consolidated financial results. The Company is also involved in other kinds of legal actions, some of which assert or may assert claims or seek to impose fines, penalties and other costs in substantial amounts and are described below. Environmental Laws and Regulations The Company is subject to federal, state, local and foreign laws and regulations regarding climate change, renewable portfolio standards, air and water quality, emissions performance standards, coal combustion byproduct disposal, hazardous and solid waste disposal, protected species and other environmental matters that have the potential to impact the Company's current and future operations. The Company believes it is in material compliance with all applicable laws and regulations. Hydroelectric Relicensing PacifiCorp is a party to the 2016 amended Klamath Hydroelectric Settlement Agreement ("KHSA"), which is intended to resolve disputes surrounding PacifiCorp's efforts to relicense the Klamath Hydroelectric Project. The KHSA does not guarantee dam removal. Instead, it establishes a process for PacifiCorp, the states of Oregon and California ("States") and other stakeholders to assess whether dam removal can occur consistent with the settlement's terms. For PacifiCorp, the key elements of the settlement include: (1) a contribution from PacifiCorp's Oregon and California customers capped at $200 million plus $250 million in California bond funds; (2) complete indemnification from harms associated with dam removal; (3) transfer of the Federal Energy Regulatory Commission ("FERC") license to a third-party dam removal entity, the Klamath River Renewal Corporation ("KRRC"), who would conduct dam removal; and (4) PacifiCorp can operate the facilities for the benefit of customers until dam removal commences. In September 2016, the KRRC and PacifiCorp filed a joint application with the FERC to transfer the license for the four main-stem Klamath dams from PacifiCorp to the KRRC. Over the past two years, the KRRC has been supplementing the application with additional information about its financial, technical and legal capacity to become the licensee. The KRRC is expected to provide the FERC on July 29, 2019, with additional information, including updated cost estimates, and its insurance, bonding and liability transfer package. Based on that information, the FERC should be in a position to determine whether license transfer to the KRRC is in the public interest. That information should also allow PacifiCorp and the States to assess whether the KRRC has the ability to satisfy its indemnification obligations under the KHSA, and whether there is sufficient funding available under the settlement. If certain conditions in the amended KHSA are not satisfied (e.g., inadequate funding or inability of KRRC to satisfy its indemnification obligation) and the license does not transfer to the KRRC, PacifiCorp will resume relicensing with the FERC. The United States Court of Appeals for the District of Columbia Circuit issued a decision in the Hoopa Valley Tribe v. FERC litigation, in January 2019, finding that the states of California and Oregon have waived their Clean Water Act, Section 401, water quality certification authority over the Klamath hydroelectric project relicensing. This decision has the potential to limit the ability of the States to impose water quality conditions on new and relicensed projects. Environmental interests, supported by California, Oregon and other states, asked the court to rehear the case, which was denied. Guarantees The Company has entered into guarantees as part of the normal course of business and the sale of certain assets. These guarantees are not expected to have a material impact on the Company's consolidated financial results.
PacifiCorp [Member]
Loss Contingencies [Line Items]
Commitments and Contingencies	Commitments and Contingencies Commitments During the three-month period ended March 31, 2019, PacifiCorp entered into non-cancelable agreements through 2020 totaling $486 million related to repowering certain existing wind facilities in Wyoming and Washington. Legal Matters PacifiCorp is party to a variety of legal actions arising out of the normal course of business. Plaintiffs occasionally seek punitive or exemplary damages. PacifiCorp does not believe that such normal and routine litigation will have a material impact on its consolidated financial results. Environmental Laws and Regulations PacifiCorp is subject to federal, state and local laws and regulations regarding climate change, renewable portfolio standards, air and water quality, emissions performance standards, coal combustion byproduct disposal, hazardous and solid waste disposal, protected species and other environmental matters that have the potential to impact PacifiCorp's current and future operations. PacifiCorp believes it is in material compliance with all applicable laws and regulations. Hydroelectric Relicensing PacifiCorp is a party to the 2016 amended Klamath Hydroelectric Settlement Agreement ("KHSA"), which is intended to resolve disputes surrounding PacifiCorp's efforts to relicense the Klamath Hydroelectric Project. The KHSA does not guarantee dam removal. Instead, it establishes a process for PacifiCorp, the states of Oregon and California ("States") and other stakeholders to assess whether dam removal can occur consistent with the settlement's terms. For PacifiCorp, the key elements of the settlement include: (1) a contribution from PacifiCorp's Oregon and California customers capped at $200 million plus $250 million in California bond funds; (2) complete indemnification from harms associated with dam removal; (3) transfer of the Federal Energy Regulatory Commission ("FERC") license to a third-party dam removal entity, the Klamath River Renewal Corporation ("KRRC"), who would conduct dam removal; and (4) PacifiCorp can operate the facilities for the benefit of customers until dam removal commences. In September 2016, the KRRC and PacifiCorp filed a joint application with the FERC to transfer the license for the four main-stem Klamath dams from PacifiCorp to the KRRC. Over the past two years, the KRRC has been supplementing the application with additional information about its financial, technical, and legal capacity to become the licensee. The KRRC is expected to provide the FERC on July 29, 2019, with additional information, including updated cost estimates, and its insurance, bonding and liability transfer package. Based on that information, the FERC should be in a position to determine whether license transfer to the KRRC is in the public interest. That information should also allow PacifiCorp and the States to assess whether the KRRC has the ability to satisfy its indemnification obligations under the KHSA, and whether there is sufficient funding available under the settlement. If certain conditions in the amended KHSA are not satisfied (e.g., inadequate funding or inability of KRRC to satisfy its indemnification obligation) and the license does not transfer to the KRRC, PacifiCorp will resume relicensing with the FERC. The United States Court of Appeals for the District of Columbia Circuit issued a decision in the Hoopa Valley Tribe v. FERC litigation, in January 2019, finding that the states of California and Oregon have waived their Clean Water Act, Section 401, water quality certification authority over the Klamath hydroelectric project relicensing. This decision has the potential to limit the ability of the States to impose water quality conditions on new and relicensed projects. Environmental interests, supported by California, Oregon and other states, asked the court to rehear the case, which was denied. Guarantees PacifiCorp has entered into guarantees as part of the normal course of business and the sale of certain assets. These guarantees are not expected to have a material impact on PacifiCorp's consolidated financial results.
MidAmerican Energy Company [Member]
Loss Contingencies [Line Items]
Commitments and Contingencies	Commitments and Contingencies Easements During the three-month period ended March 31, 2019, MidAmerican Energy entered into non-cancelable easements with minimum payments totaling $197 million through 2059 for land in Iowa on which some of its wind-powered generating facilities will be located. Maintenance and Service Contracts During the three-month period ended March 31, 2019, MidAmerican Energy entered into non-cancelable maintenance and service contracts related to wind-powered generating facilities with minimum payment commitments totaling $301 million through 2029. Legal Matters MidAmerican Energy is party to a variety of legal actions arising out of the normal course of business. Plaintiffs occasionally seek punitive or exemplary damages. MidAmerican Energy does not believe that such normal and routine litigation will have a material impact on its financial results. Environmental Laws and Regulations MidAmerican Energy is subject to federal, state and local laws and regulations regarding climate change, renewable portfolio standards, air and water quality, emissions performance standards, coal combustion byproduct disposal, hazardous and solid waste disposal, protected species and other environmental matters that have the potential to impact its current and future operations. MidAmerican Energy believes it is in material compliance with all applicable laws and regulations. Transmission Rates MidAmerican Energy's wholesale transmission rates are set annually using FERC-approved formula rates subject to true-up for actual cost of service. Prior to September 2016, the rates in effect were based on a 12.38% return on equity ("ROE"). In November 2013 and February 2015, a coalition of intervenors filed successive complaints with the FERC requesting that the 12.38% ROE no longer be found just and reasonable and sought to reduce the base ROE to 9.15% and 8.67%, respectively. MidAmerican Energy is authorized by the FERC to include a 0.50% adder beyond the base ROE effective January 2015. In September 2016, the FERC issued an order for the first complaint, which reduces the base ROE to 10.32% and required refunds, plus interest, for the period from November 2013 through February 2015. Customer refunds relative to the first complaint occurred in February 2017. It is uncertain when the FERC will rule on the second complaint, covering the period from February 2015 through May 2016. MidAmerican Energy believes it is probable that the FERC will order a base ROE lower than 12.38% in the second complaint and, as of March 31, 2019, has accrued a $10 million liability for refunds under the second complaint of amounts collected under the higher ROE from March 2015 through May 2016.
MidAmerican Funding, LLC and Subsidiaries [Domain]
Loss Contingencies [Line Items]
Commitments and Contingencies	Commitments and Contingencies MidAmerican Funding is party to a variety of legal actions arising out of the normal course of business. Plaintiffs occasionally seek punitive or exemplary damages. MidAmerican Funding does not believe that such normal and routine litigation will have a material impact on its consolidated financial results. Refer to Note 10 of MidAmerican Energy's Notes to Financial Statements.
Nevada Power Company [Member]
Loss Contingencies [Line Items]
Commitments and Contingencies	Commitments and Contingencies Environmental Laws and Regulations Nevada Power is subject to federal, state and local laws and regulations regarding climate change, renewable portfolio standards, air and water quality, emissions performance standards, coal combustion byproduct disposal, hazardous and solid waste disposal, protected species and other environmental matters that have the potential to impact Nevada Power's current and future operations. Nevada Power believes it is in material compliance with all applicable laws and regulations. Legal Matters Nevada Power is party to a variety of legal actions arising out of the normal course of business. Plaintiffs occasionally seek punitive or exemplary damages. Nevada Power does not believe that such normal and routine litigation will have a material impact on its consolidated financial results. Nevada Power is also involved in other kinds of legal actions, some of which assert or may assert claims or seek to impose fines, penalties and other costs in substantial amounts.
Sierra Pacific Power Company [Member]
Loss Contingencies [Line Items]
Commitments and Contingencies	Commitments and Contingencies Environmental Laws and Regulations Sierra Pacific is subject to federal, state and local laws and regulations regarding climate change, renewable portfolio standards, air and water quality, emissions performance standards, coal combustion byproduct disposal, hazardous and solid waste disposal, protected species and other environmental matters that have the potential to impact Sierra Pacific's current and future operations. Sierra Pacific believes it is in material compliance with all applicable laws and regulations. Legal Matters Sierra Pacific is party to a variety of legal actions arising out of the normal course of business. Plaintiffs occasionally seek punitive or exemplary damages. Sierra Pacific does not believe that such normal and routine litigation will have a material impact on its financial results. Sierra Pacific is also involved in other kinds of legal actions, some of which assert or may assert claims or seek to impose fines, penalties and other costs in substantial amounts.

XML 83 R47.htm IDEA: XBRL DOCUMENT

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

3 Months Ended

Mar. 31, 2019

Revenue from Contracts with Customers

Energy Products and Services



	For the Three-Month Period Ended March 31, 2019
	PacifiCorp		MidAmerican Funding		NV Energy		Northern Powergrid		BHE Pipeline Group			BHE Transmission		BHE Renewables		BHE and Other⁽¹⁾			Total
Customer Revenue:
Regulated:
Retail electric	$	1,186	$	443	$	527	$	—	$	—		$	—	$	—	$	—		$	2,156
Retail gas	—		260		37		—		—			—		—		—			297
Wholesale	28		110		18		—		—			—		—		—			156
Transmission and distribution	25		16		24		230		—			167		—		—			462
Interstate pipeline	—		—		—		—		372			—		—		(37		)	335
Other	—		—		1		—		—			—		—		—			1
Total Regulated	1,239		829		607		230		372			167		—		(37		)	3,407
Nonregulated	—		6		—		8		—			1		126		139			280
Total Customer Revenue	1,239		835		607		238		372			168		126		102			3,687
Other revenue⁽²⁾	20		7		7		25		(1		)	—		41		39			138
Total	$	1,259	$	842	$	614	$	263	$	371		$	168	$	167	$	141		$	3,825



	For the Three-Month Period Ended March 31, 2018
	PacifiCorp		MidAmerican Funding		NV Energy		Northern Powergrid		BHE Pipeline Group		BHE Transmission		BHE Renewables		BHE and Other⁽¹⁾			Total
Customer Revenue:
Regulated:
Retail electric	$	1,096	$	386	$	539	$	—	$	—	$	—	$	—	$	—		$	2,021
Retail gas	—		246		40		—		—		—		—		—			286
Wholesale	22		93		11		—		—		—		—		(1		)	125
Transmission and distribution	22		16		20		249		—		180		—		—			487
Interstate pipeline	—		—		—		—		374		—		—		(41		)	333
Other	—		—		—		—		—		—		—		—			—
Total Regulated	1,140		741		610		249		374		180		—		(42		)	3,252
Nonregulated	—		—		—		11		—		—		117		144			272
Total Customer Revenue	1,140		741		610		260		374		180		117		102			3,524
Other revenue	44		6		7		18		2		—		37		41			155
Total	$	1,184	$	747	$	617	$	278	$	376	$	180	$	154	$	143		$	3,679


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


(2)	Includes net payments to counterparties for the financial settlement of certain derivative contracts at BHE Pipeline Group.

Real Estate Services

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



	HomeServices
	Three-Month Periods
	Ended March 31,
	2019		2018
Customer Revenue:
Brokerage	$	711	$	685
Franchise	14		15
Total Customer Revenue	725		700
Other revenue	60		61
Total	$	785	$	761

Remaining Performance Obligations



	Performance obligations expected to be satisfied:
	Less than 12 months		More than 12 months		Total
BHE Pipeline Group	$	918	$	5,796	$	6,714

Revenue from Contracts with Customers

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



	Three-Month Periods
	Ended March 31,
	2019		2018
Customer Revenue:
Retail:
Residential	$	489	$	441
Commercial	360		342
Industrial	292		269
Other retail	29		25
Total retail	1,170		1,077
Wholesale	28		22
Transmission	25		22
Other Customer Revenue	16		19
Total Customer Revenue	1,239		1,140
Other revenue	20		44
Total operating revenue	$	1,259	$	1,184

Revenue from Contracts with Customers

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



	Three-Month Periods
	Ended March 31,
	2019		2018
Customer Revenue:
Retail:
Residential	$	200	$	193
Commercial	90		95
Industrial	70		79
Other	5		6
Total fully bundled	365		373
Distribution only service	7		7
Total retail	372		380
Wholesale, transmission and other	17		10
Total Customer Revenue	389		390
Other revenue	6		5
Total revenue	$	395	$	395

Revenue from Contracts with Customers



	Three-Month Periods
	Ended March 31,
	2019						2018
	Electric		Gas		Total		Electric		Gas		Total
Customer Revenue:
Retail:
Residential	$	68	$	24	$	92	$	68	$	26	$	94
Commercial	54		10		64		57		11		68
Industrial	39		3		42		39		3		42
Other	2		—		2		2		—		2
Total fully bundled	163		37		200		166		40		206
Distribution only service	1		—		1		1		—		1
Total retail	164		37		201		167		40		207
Wholesale, transmission and other	17		—		17		13		—		13
Total Customer Revenue	181		37		218		180		40		220
Other revenue	1		—		1		1		1		2
Total revenue	$	182	$	37	$	219	$	181	$	41	$	222

Revenue from Contracts with Customers



	For the Three-Month Period Ended March 31, 2019
	Electric		Natural Gas		Other		Total
Customer Revenue:
Retail:
Residential	$	171	$	175	$	—	$	346
Commercial	75		66		—		141
Industrial	163		6		—		169
Natural gas transportation services	—		12		—		12
Other retail	35		1		—		36
Total retail	444		260		—		704
Wholesale	76		34		—		110
Multi-value transmission projects	16		—		—		16
Other Customer Revenue	—		—		5		5
Total Customer Revenue	536		294		5		835
Other revenue	6		1		—		7
Total operating revenue	$	542	$	295	$	5	$	842



	For the Three-Month Period Ended March 31, 2018
	Electric		Natural Gas			Other		Total
Customer Revenue:
Retail:
Residential	$	161	$	168		$	—	$	329
Commercial	71		62			—		133
Industrial	145		5			—		150
Natural gas transportation services	—		13			—		13
Other retail	10		(6		)	—		4
Total retail	387		242			—		629
Wholesale	62		32			—		94
Multi-value transmission projects	15		—			—		15
Other Customer Revenue	—		—			2		2
Total Customer Revenue	464		274			2		740
Other revenue	5		1			—		6
Total operating revenue	$	469	$	275		$	2	$	746

Accumulated Other Comprehensive Income (Loss) [Line Items]

Revenue from Contracts with Customers

XML 84 R48.htm IDEA: XBRL DOCUMENT

Components of Accumulated Other Comprehensive Loss, Net

3 Months Ended

Mar. 31, 2019

Components of Accumulated Other Comprehensive Income (Loss), Net

Components of Other Comprehensive Income (Loss), Net

The following table shows the change in AOCI attributable to BHE shareholders by each component of OCI, net of applicable income tax (in millions):



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

Balance, December 31, 2017	$	(383	)	$	(1,129	)	$	1,085		$	29		$	(398	)
Adoption of ASU 2016-01	—			—			(1,085		)	—			(1,085		)
Other comprehensive (loss) income	(3		)	73			—			(2		)	68
Balance, March 31, 2018	$	(386	)	$	(1,056	)	$	—		$	27		$	(1,415	)

Balance, December 31, 2018	$	(358	)	$	(1,623	)	$	—		$	36		$	(1,945	)
Other comprehensive (loss) income	(32		)	155			—			(8		)	115
Balance, March 31, 2019	$	(390	)	$	(1,468	)	$	—		$	28		$	(1,830	)

XML 85 R49.htm IDEA: XBRL DOCUMENT

Segment Information

3 Months Ended

Mar. 31, 2019

Segment Information



	Three-Month Periods
	Ended March 31,
	2019		2018
Operating revenue:
PacifiCorp	$	1,259	$	1,184
MidAmerican Funding	842		747
NV Energy	614		617
Northern Powergrid	263		278
BHE Pipeline Group	371		376
BHE Transmission	168		180
BHE Renewables	167		154
HomeServices	785		761
BHE and Other⁽¹⁾	141		143
Total operating revenue	$	4,610	$	4,440



	Three-Month Periods
	Ended March 31,
	2019			2018
Depreciation and amortization:
PacifiCorp	$	205		$	202
MidAmerican Funding	177			158
NV Energy	120			113
Northern Powergrid	63			63
BHE Pipeline Group	28			42
BHE Transmission	58			62
BHE Renewables	70			64
HomeServices	13			12
BHE and Other⁽¹⁾	(1		)	—
Total depreciation and amortization	$	733		$	716



Operating income:
PacifiCorp	$	284		$	247
MidAmerican Funding	116			79
NV Energy	84			89
Northern Powergrid	129			147
BHE Pipeline Group	243			226
BHE Transmission	76			81
BHE Renewables	18			28
HomeServices	(21		)	(8		)
BHE and Other⁽¹⁾	(10		)	(18		)
Total operating income	919			871
Interest expense	(477		)	(466		)
Capitalized interest	16			12
Allowance for equity funds	32			21
Interest and dividend income	30			26
Losses on marketable securities, net	(68		)	(209		)
Other, net	35			30
Total income before income tax expense and equity income	$	487		$	285



Interest expense:
PacifiCorp	$	96	$	96
MidAmerican Funding	75		63
NV Energy	62		58
Northern Powergrid	34		37
BHE Pipeline Group	12		10
BHE Transmission	39		43
BHE Renewables	44		52
HomeServices	7		4
BHE and Other⁽¹⁾	108		103
Total interest expense	$	477	$	466



	Three-Month Periods
	Ended March 31,
	2019		2018
Operating revenue by country:
United States	$	4,177	$	3,978
United Kingdom	263		277
Canada	168		180
Philippines and other	2		5
Total operating revenue by country	$	4,610	$	4,440



Income before income tax expense and equity income by country:
United States	$	336	$	118
United Kingdom	103		112
Canada	40		41
Philippines and other	8		14
Total income before income tax expense and equity income by country	$	487	$	285



	As of
	March 31,		December 31,
	2019		2018
Assets:
PacifiCorp	$	24,211	$	23,478
MidAmerican Funding	20,845		20,029
NV Energy	14,105		14,119
Northern Powergrid	7,626		7,427
BHE Pipeline Group	5,579		5,511
BHE Transmission	8,567		8,424
BHE Renewables	8,654		8,666
HomeServices	3,427		2,797
BHE and Other⁽¹⁾	1,531		1,738
Total assets	$	94,545	$	92,189


(1)	The differences between the reportable segment amounts and the consolidated amounts, described as BHE and Other, relate principally to other entities, corporate functions and intersegment eliminations.

The following table shows the change in the carrying amount of goodwill by reportable segment for the three-month period ended March 31, 2019 (in millions):



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

December 31, 2018	$	1,129	$	2,102	$	2,369	$	952	$	73	$	1,448	$	95	$	1,427	$	9,595
Acquisitions	—		—		—		—		—		—		—		23		23
Foreign currency translation	—		—		—		14		—		31		—		—		45
March 31, 2019	$	1,129	$	2,102	$	2,369	$	966	$	73	$	1,479	$	95	$	1,450	$	9,663

Segment Information

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



	Three-Month Periods
	Ended March 31,
	2019			2018
Operating revenue:
Regulated electric	$	542		$	469
Regulated natural gas	295			275
Other	5			2
Total operating revenue	$	842		$	746

Operating income:
Regulated electric	$	66		$	36
Regulated natural gas	48			43
Other	1			—
Total operating income	115			79
Interest expense	(69		)	(58		)
Allowance for borrowed funds	6			4
Allowance for equity funds	15			10
Other, net	20			9
Income before income tax benefit	$	87		$	44



	As of
	March 31, 2019		December 31, 2018
Assets:
Regulated electric	$	17,373	$	16,511
Regulated natural gas	1,357		1,406
Other	2		3
Total assets	$	18,732	$	17,920

Segment Information

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



	Three-Month Periods
	Ended March 31,
	2019			2018
Operating revenue:
Regulated electric	$	542		$	469
Regulated natural gas	295			275
Other	5			3
Total operating revenue	$	842		$	747

Operating income:
Regulated electric	$	66		$	36
Regulated natural gas	48			43
Other	2			—
Total operating income	116			79
Interest expense	(75		)	(63		)
Allowance for borrowed funds	6			4
Allowance for equity funds	15			10
Other, net	21			10
Income before income tax benefit	$	83		$	40



	As of
	March 31, 2019		December 31, 2018
Assets⁽¹⁾:
Regulated electric	$	18,564	$	17,702
Regulated natural gas	1,436		1,485
Other	17		15
Total assets	$	20,017	$	19,202



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

Investments and Restricted Cash and Investments [Abstract]

Segment Information

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



	Three-Month Periods
	Ended March 31,
	2019			2018
Operating revenue:
Regulated electric	$	182		$	181
Regulated natural gas	37			41
Total operating revenue	$	219		$	222

Operating income:
Regulated electric	$	29		$	37
Regulated natural gas	8			10
Total operating income	37			47
Interest expense	(12		)	(10		)
Allowance for equity funds	1			1
Other, net	2			2
Income before income tax expense	$	28		$	40



	As of
	March 31,		December 31,
	2019		2018
Assets:
Regulated electric	$	3,227	$	3,177
Regulated natural gas	316		314
Regulated common assets⁽¹⁾	74		78
Total assets	$	3,617	$	3,569


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

XML 86 R50.htm IDEA: XBRL DOCUMENT

BHE Shareholders' Equity (Notes)	3 Months Ended
BHE Shareholders' Equity (Notes)	Mar. 31, 2019
Equity [Abstract]
Stockholders' Equity Note Disclosure [Text Block]	BHE Shareholders' Equity For the three-month periods ended March 31, 2019 and 2018, BHE repurchased from certain family interests of Mr. Walter Scott, Jr. 447,712 shares of its common stock for $293 million and 149,281 shares of its common stock for $90 million, respectively.

XML 87 R51.htm IDEA: XBRL DOCUMENT

Cash and Cash Equivalents and Restricted Cash and Cash Equivalents Supplemental Cash Flow Disclosure (Policies)	3 Months Ended
	Mar. 31, 2019
MidAmerican Funding, LLC and Subsidiaries [Domain]
Cash and Cash Equivalents, Policy [Policy Text Block]	Cash equivalents consist of funds invested in money market mutual funds, United States Treasury Bills and other investments with a maturity of three months or less when purchased. Cash and cash equivalents exclude amounts where availability is restricted by legal requirements, loan agreements or other contractual provisions. Restricted cash and cash equivalents as of March 31, 2019 and December 31, 2018, consist substantially of funds restricted for the purpose of constructing solid waste facilities under tax-exempt bond obligation agreements.
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, 2019 and December 31, 2018, consist substantially of funds restricted for the purpose of constructing solid waste facilities under tax-exempt bond obligation agreements.

XML 88 R52.htm IDEA: XBRL DOCUMENT

Investments and Restricted Cash and Investments (Tables)

3 Months Ended

Mar. 31, 2019

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,
	2019		2018
Investments:
BYD Company Limited common stock	$	1,356	$	1,435
Rabbi trusts	394		371
Other	180		168
Total investments	1,930		1,974

Equity method investments:
BHE Renewables tax equity investments	1,627		1,661
Electric Transmission Texas, LLC	529		527
Bridger Coal Company	97		99
Other	158		153
Total equity method investments	2,411		2,440

Restricted cash and cash equivalents and investments:
Quad Cities Station nuclear decommissioning trust funds	545		504
Restricted cash and cash equivalents	196		256
Total restricted cash and cash equivalents and investments	741		760

Total investments and restricted cash and cash equivalents and investments	$	5,082	$	5,174

Reflected as:
Current assets	$	205	$	271
Noncurrent assets	4,877		4,903
Total investments and restricted cash and cash equivalents and investments	$	5,082	$	5,174

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

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



	Three-Month Periods
	Ended March 31,
	2019			2018
Unrealized losses recognized on marketable securities still held at the reporting date	$	(68	)	$	(211	)
Net gains recognized on marketable securities sold during the period	—			2
Losses on marketable securities, net	$	(68	)	$	(209	)

XML 89 R53.htm IDEA: XBRL DOCUMENT

Property, Plant and Equipment, Net (Tables)

3 Months Ended

Mar. 31, 2019

Property, Plant and Equipment [Table Text Block]

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



		As of
	Depreciable	March 31,			December 31,
	Life	2019			2018
Regulated assets:
Utility generation, transmission and distribution systems	5-80 years	$	77,659		$	76,707
Interstate natural gas pipeline assets	3-80 years	7,547			7,524
		85,206			84,231
Accumulated depreciation and amortization		(26,253		)	(25,894		)
Regulated assets, net		58,953			58,337

Nonregulated assets:
Independent power plants	5-30 years	6,844			6,826
Other assets	3-30 years	1,474			1,424
		8,318			8,250
Accumulated depreciation and amortization		(1,711		)	(1,610		)
Nonregulated assets, net		6,607			6,640

Net operating assets		65,560			64,977
Construction work-in-progress		3,388			3,110
Property, plant and equipment, net		$	68,948		$	68,087

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



		As of
		March 31,			December 31,
	Depreciable Life	2019			2018
Utility plant in service, net:
Generation	20-70 years	$	14,092		$	13,727
Transmission	52-75 years	1,946			1,934
Electric distribution	20-75 years	3,732			3,672
Natural gas distribution	29-75 years	1,734			1,724
Utility plant in service		21,504			21,057
Accumulated depreciation and amortization		(6,076		)	(5,941		)
Utility plant in service, net		15,428			15,116
Nonregulated property, net:
Nonregulated property gross	20-50 years	7			7
Accumulated depreciation and amortization		(1		)	(1		)
Nonregulated property, net		6			6
		15,434			15,122
Construction work-in-progress		1,111			1,035
Property, plant and equipment, net		$	16,545		$	16,157



		As of
		March 31,			December 31,
	Depreciable Life	2019			2018
Utility Plant:
Utility plant in-service	5-75 years	$	28,455		$	28,399
Accumulated depreciation and amortization		(10,105		)	(10,034		)
Utility plant in-service, net		18,350			18,365
Other non-regulated, net of accumulated depreciation and amortization	47 years	10			10
Plant, net		18,360			18,375
Construction work-in-progress		1,338			1,195
Property, plant and equipment, net		$	19,698		$	19,570

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



		As of
	Depreciable Life	March 31,			December 31,
	Depreciable Life	2019			2018
Utility plant:
Generation	30 - 55 years	$	3,725		$	3,720
Distribution	20 - 65 years	3,436			3,411
Transmission	45 - 70 years	1,441			1,439
General and intangible plant	5 - 65 years	710			716
Utility plant		9,312			9,286
Accumulated depreciation and amortization		(2,995		)	(2,966		)
Utility plant, net		6,317			6,320
Other non-regulated, net of accumulated depreciation and amortization	45 years	1			1
Plant, net		6,318			6,321
Construction work-in-progress		125			97
Property, plant and equipment, net		$	6,443		$	6,418

Condensed Cash Flow Statements, Captions [Line Items]

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



		As of
	Depreciable Life	March 31,			December 31,
	Depreciable Life	2019			2018
Utility plant:
Electric generation	25 - 60 years	$	1,132		$	1,132
Electric distribution	20 - 100 years	1,588			1,568
Electric transmission	50 - 100 years	818			812
Electric general and intangible plant	5 - 70 years	174			185
Natural gas distribution	35 - 70 years	405			403
Natural gas general and intangible plant	5 - 70 years	14			14
Common general	5 - 70 years	318			321
Utility plant		4,449			4,435
Accumulated depreciation and amortization		(1,585		)	(1,583		)
Utility plant, net		2,864			2,852
Other non-regulated, net of accumulated depreciation and amortization	70 years	5			5
Plant, net		2,869			2,857
Construction work-in-progress		96			90
Property, plant and equipment, net		$	2,965		$	2,947

XML 90 R54.htm IDEA: XBRL DOCUMENT

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

3 Months Ended

Mar. 31, 2019

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

Cash and Cash Equivalents and Restricted Cash and Cash Equivalents



	As of
	March 31,		December 31,
	2019		2018
Cash and cash equivalents	$	1,661	$	627
Restricted cash and cash equivalents	181		227
Investments and restricted cash and cash equivalents and investments	15		29
Total cash and cash equivalents and restricted cash and cash equivalents	$	1,857	$	883

Condensed Cash Flow Statements, Captions [Line Items]

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

A reconciliation of cash and cash equivalents and restricted cash and cash equivalents as of March 31, 2019 and December 31, 2018, as presented in the Statements of Cash Flows is outlined below and disaggregated by the line items in which they appear on the Balance Sheets (in millions):



	As of
	March 31,		December 31,
	2019		2018
Cash and cash equivalents	$	62	$	71
Restricted cash and cash equivalents included in other current assets	6		5
Total cash and cash equivalents and restricted cash and cash equivalents	$	68	$	76

Condensed Cash Flow Statements, Captions [Line Items]

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

A reconciliation of cash and cash equivalents and restricted cash and cash equivalents as of March 31, 2019 and December 31, 2018, as presented in the Consolidated Statements of Cash Flows is outlined below and disaggregated by the line items in which they appear on the Consolidated Balance Sheets (in millions):



	As of
	March 31,		December 31,
	2019		2018
Cash and cash equivalents	$	51	$	111
Restricted cash and cash equivalents included in other current assets	11		10
Total cash and cash equivalents and restricted cash and cash equivalents	$	62	$	121

Condensed Cash Flow Statements, Captions [Line Items]

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



	As of
	March 31,		December 31,
	2019		2018
Cash and cash equivalents	$	669	$	77
Restricted cash included in other current assets	13		13
Restricted cash included in other assets	2		2
Total cash and cash equivalents and restricted cash and cash equivalents	$	684	$	92

Condensed Cash Flow Statements, Captions [Line Items]

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



	As of
	March 31		December 31
	2019		2018

Cash and cash equivalents	$	433	$	1
Restricted cash and cash equivalents in other current assets	47		56
Total cash and cash equivalents and restricted cash and cash equivalents	$	480	$	57

Condensed Cash Flow Statements, Captions [Line Items]

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



	As of
	March 31,		December 31
	2019		2018

Cash and cash equivalents	$	432	$	—
Restricted cash and cash equivalents in other current assets	47		56
Total cash and cash equivalents and restricted cash and cash equivalents	$	479	$	56

XML 91 R55.htm IDEA: XBRL DOCUMENT

Leases Leases (Tables)

3 Months Ended

Mar. 31, 2019

Operating and Finance Lease, Balance Sheet Summary [Table Text Block]

The following table summarizes the Company's leases recorded on the Consolidated Balance Sheet (in millions):



	As of
	March 31,
	2019
Right-of-use assets:
Operating leases	$	544
Finance leases	509
Total right-of-use assets	$	1,053

Lease liabilities:
Operating leases	$	586
Finance leases	522
Total lease liabilities	$	1,108

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

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



	Three-Month Period
	Ended March 31,
	2019

Variable	$	144
Operating	41
Finance:
Amortization	4
Interest	11
Short-term	1
Total lease costs	$	201

Weighted-average remaining lease term (years):
Operating leases	7.5
Finance leases	29.5

Weighted-average discount rate:
Operating leases	5.3		%
Finance leases	8.7		%

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



	Three-Month Period
	Ended March 31,
	2019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$	(37	)
Operating cash flows from finance leases	(12		)
Financing cash flows from finance leases	(5		)
Right-of-use assets obtained in exchange for lease liabilities:
Operating leases	$	12
Finance leases	1

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

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



	March 31, 2019									December 31, 2018⁽¹⁾
	Operating			Finance			Total			Operating		Capital		Total
2019	$	115		$	53		$	168		$	147	$	69	$	216
2020	138			68			206			128		68		196
2021	116			74			190			110		73		183
2022	92			67			159			87		67		154
2023	66			56			122			61		56		117
Thereafter	198			775			973			159		772		931
Total undiscounted lease payments	725			1,093			1,818			$	692	$	1,105	$	1,797
Less - amounts representing interest	(139		)	(571		)	(710		)
Lease liabilities	$	586		$	522		$	1,108

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

Operating and Finance Lease, Balance Sheet Summary [Table Text Block]

The following table summarizes PacifiCorp's leases recorded on the Consolidated Balance Sheet (in millions):



	As of
	March 31,
	2019
Right-of-use assets:
Operating leases	$	14
Finance leases	20
Total right-of-use assets	$	34

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

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

Cash payments associated with operating and finance lease liabilities approximated lease cost. The following table summarizes PacifiCorp's lease costs (in millions):



	Three-Month Period
	Ended March 31,
	2019

Variable	$	9
Operating	1
Finance:
Interest	1
Total lease costs	$	11

Weighted-average remaining lease term (years):
Operating leases	13.6
Finance leases	9.7

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

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



	March 31, 2019									December 31, 2018⁽¹⁾
	Operating			Finance			Total			Operating		Capital		Total
2019	$	2		$	3		$	5		$	3	$	4	$	7
2020	2			3			5			3		4		7
2021	2			7			9			3		7		10
2022	2			3			5			2		3		5
2023	2			2			4			2		2		4
Thereafter	8			16			24			7		16		23
Total undiscounted lease payments	18			34			52			$	20	$	36	$	56
Less - amounts representing interest	(4		)	(14		)	(18		)
Lease liabilities	$	14		$	20		$	34

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

Operating and Finance Lease, Balance Sheet Summary [Table Text Block]

The following table summarizes Nevada Power's leases recorded on the Consolidated Balance Sheet (in millions):



	As of
	March 31,
	2019
Right-of-use assets:
Operating leases	$	15
Finance leases	449
Total right-of-use assets	$	464

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

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

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



	Three-Month Period
	Ended March 31,
	2019

Variable	$	108
Operating	1
Finance:
Amortization	3
Interest	10
Total lease costs	$	122

Weighted-average remaining lease term (years):
Operating leases	8.1
Finance leases	31.3

Weighted-average discount rate:
Operating leases	4.5		%
Finance leases	8.7		%

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



	Three-Month Period
	Ended March 31,
	2019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$	(1	)
Operating cash flows from finance leases	(11		)
Financing cash flows from finance leases	(3		)
Right-of-use assets obtained in exchange for lease liabilities:
Finance leases	$	1

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

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



	March 31, 2019									December 31, 2018⁽¹⁾
	Operating			Finance			Total			Operating		Capital		Total
2019	$	2		$	46		$	48		$	3	$	59	$	62
2020	3			58			61			3		59		62
2021	3			62			65			3		61		64
2022	2			60			62			3		60		63
2023	2			50			52			2		50		52
Thereafter	10			711			721			10		709		719
Total undiscounted lease payments	22			987			1,009			$	24	$	998	$	1,022
Less - amounts representing interest	(4		)	(525		)	(529		)
Lease liabilities	$	18		$	462		$	480

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

Operating and Finance Lease, Balance Sheet Summary [Table Text Block]

The following table summarizes Sierra Pacific's leases recorded on the Balance Sheet (in millions):



	As of
	March 31,
	2019
Right-of-use assets:
Operating leases	$	19
Finance leases	38
Total right-of-use assets	$	57

Lease liabilities:
Operating leases	$	19
Finance leases	39
Total lease liabilities	$	58

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

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



	Three-Month Period
	Ended March 31,
	2019

Variable	$	15
Operating	—
Finance:
Amortization	1
Interest	1
Total lease costs	$	17

Weighted-average remaining lease term (years):
Operating leases	25.7
Finance leases	23.8

Weighted-average discount rate:
Operating leases	4.9		%
Finance leases	7.3		%

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



	Three-Month Period
	Ended March 31,
	2019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from finance leases	$	(1	)

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

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



	March 31, 2019									December 31, 2018⁽¹⁾
	Operating			Finance			Total			Operating		Capital		Total
2019	$	2		$	4		$	6		$	2	$	6	$	8
2020	2			5			7			2		4		6
2021	2			5			7			2		5		7
2022	1			4			5			1		4		5
2023	1			4			5			1		4		5
Thereafter	27			47			74			28		47		75
Total undiscounted lease payments	35			69			104			$	36	$	70	$	106
Less - amounts representing interest	(16		)	(30		)	(46		)
Lease liabilities	$	19		$	39		$	58

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

XML 92 R56.htm IDEA: XBRL DOCUMENT

Income Taxes (Tables)

3 Months Ended

Mar. 31, 2019

Schedule of Effective Income Tax Rate Reconciliation [Line Items]

Schedule of Effective Income Tax Rate Reconciliation

Income Taxes

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



	Three-Month Periods
	Ended March 31,
	2019		2018

Federal statutory income tax rate	21	%	21	%
Income tax credits	(29	)	(45	)
State income tax, net of federal income tax benefit	(17	)	(30	)
Income tax effect of foreign income	(3	)	(16	)
Effects of ratemaking	(3	)	(8	)
Equity income	(1	)	1
Other, net	2		(1	)
Effective income tax rate	(30	)%	(78	)%

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,
	2019		2018

Federal statutory income tax rate	21	%	21	%
Income tax credits	(29	)	(45	)
State income tax, net of federal income tax benefit	(17	)	(30	)
Income tax effect of foreign income	(3	)	(16	)
Effects of ratemaking	(3	)	(8	)
Equity income	(1	)	1
Other, net	2		(1	)
Effective income tax rate	(30	)%	(78	)%

Schedule of Effective Income Tax Rate Reconciliation [Line Items]

Schedule of Effective Income Tax Rate Reconciliation

Income Taxes

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



	Three-Month Period
	Ended March 31,
	2019

Federal statutory income tax rate	21	%
Effects of ratemaking	2
Other	(2	)
Effective income tax rate	21	%

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



	Three-Month Period
	Ended March 31,
	2019

Federal statutory income tax rate	21	%
Effects of ratemaking	2
Other	(2	)
Effective income tax rate	21	%

Schedule of Effective Income Tax Rate Reconciliation [Line Items]

Schedule of Effective Income Tax Rate Reconciliation

Income Taxes

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



	Three-Month Periods
	Ended March 31,
	2019		2018

Federal statutory income tax rate	21	%	21	%
Effects of ratemaking	—		(5	)
Other	—		(1	)
Effective income tax rate	21	%	15	%

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,
	2019		2018

Federal statutory income tax rate	21	%	21	%
Effects of ratemaking	—		(5	)
Other	—		(1	)
Effective income tax rate	21	%	15	%

Schedule of Effective Income Tax Rate Reconciliation [Line Items]

Schedule of Effective Income Tax Rate Reconciliation


	Income Taxes

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



	Three-Month Periods
	Ended March 31,
	2019		2018

Federal statutory income tax rate	21	%	21	%
State income tax, net of federal income tax benefit	3		4
Federal income tax credits	(4	)	(5	)
Effects of ratemaking	(1	)	(4	)
Other	—		(2	)
Effective income tax rate	19	%	14	%

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



	Three-Month Periods
	Ended March 31,
	2019		2018

Federal statutory income tax rate	21	%	21	%
State income tax, net of federal income tax benefit	3		4
Federal income tax credits	(4	)	(5	)
Effects of ratemaking	(1	)	(4	)
Other	—		(2	)
Effective income tax rate	19	%	14	%

Schedule of Effective Income Tax Rate Reconciliation [Line Items]

Schedule of Effective Income Tax Rate Reconciliation

Income Taxes

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



	Three-Month Periods
	Ended March 31,
	2019		2018

Federal statutory income tax rate	21	%	21	%
Income tax credits	(113	)	(137	)
State income tax, net of federal income tax benefit	(21	)	(9	)
Effects of ratemaking	(8	)	(18	)
Other, net	(1	)	2
Effective income tax rate	(122	)%	(141	)%

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,
	2019		2018

Federal statutory income tax rate	21	%	21	%
Income tax credits	(113	)	(137	)
State income tax, net of federal income tax benefit	(21	)	(9	)
Effects of ratemaking	(8	)	(18	)
Other, net	(1	)	2
Effective income tax rate	(122	)%	(141	)%

Schedule of Effective Income Tax Rate Reconciliation [Line Items]

Schedule of Effective Income Tax Rate Reconciliation

Income Taxes

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



	Three-Month Periods
	Ended March 31,
	2019		2018

Federal statutory income tax rate	21	%	21	%
Income tax credits	(118	)	(151	)
State income tax, net of federal income tax benefit	(22	)	(10	)
Effects of ratemaking	(9	)	(20	)
Other, net	(1	)	2
Effective income tax rate	(129	)%	(158	)%

Due to a combination of declines in pre-tax income and increases in production tax credits in recent years and changes in estimates for these values throughout the year, the volatility of the effective tax rate used to determine the recognition of income tax expense each quarter has similarly increased. MidAmerican Energy concluded that, due to such increased volatility, it was no longer able to reasonably estimate an annual effective tax rate for this purpose. Accordingly, beginning January 1, 2019, production tax credits are recognized in the Statement of Operations as they are earned, and excluded in the determination of the effective tax rate used in the recognition of all other income tax expense. Production tax credits recognized in income for the three-month periods ended March 31, 2019 and 2018 were $98 million and $60 million, respectively with $30 million of the difference related to the change in the method of interim recognition in 2019.

Berkshire Hathaway includes BHE and subsidiaries in its United States federal and Iowa state income tax returns. Consistent with established regulatory practice, MidAmerican Funding's and MidAmerican Energy's provisions for income tax have been computed on a stand-alone basis, and substantially all of their currently payable or receivable income tax is remitted to or received from BHE. MidAmerican Funding received net cash payments for income tax from BHE totaling $- million and $14 million for the three-month periods ended March 31, 2019 and 2018, respectively.

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,
	2019		2018

Federal statutory income tax rate	21	%	21	%
Income tax credits	(118	)	(151	)
State income tax, net of federal income tax benefit	(22	)	(10	)
Effects of ratemaking	(9	)	(20	)
Other, net	(1	)	2
Effective income tax rate	(129	)%	(158	)%

XML 93 R57.htm IDEA: XBRL DOCUMENT

Employee Benefit Plans (Tables)

3 Months Ended

Mar. 31, 2019

Schedule of Defined Benefit Plans Disclosures

Domestic Operations

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



	Three-Month Periods
	Ended March 31,
	2019			2018
Pension:
Service cost	$	4		$	5
Interest cost	27			26
Expected return on plan assets	(38		)	(41		)
Net amortization	9			8
Net periodic benefit cost (credit)	$	2		$	(2	)

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

Foreign Operations

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



	Three-Month Periods
	Ended March 31,
	2019			2018

Service cost	$	4		$	5
Interest cost	13			14
Expected return on plan assets	(25		)	(27		)
Net amortization	9			15
Net periodic benefit cost	$	1		$	7

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,
	2019			2018
Pension:
Service cost	$	—		$	—
Interest cost	11			11
Expected return on plan assets	(17		)	(18		)
Net amortization	3			3
Net periodic benefit credit	$	(3	)	$	(4	)

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

Schedule of Defined Benefit Plans Disclosures

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



	Three-Month Periods
	Ended March 31,
	2019			2018
Pension:
Service cost	$	2		$	2
Interest cost	7			7
Expected return on plan assets	(10		)	(11		)
Net amortization	—			1
Net periodic benefit credit	$	(1	)	$	(1	)

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

Schedule of Amounts Recognized in Balance Sheet

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



	As of
	March 31,		December 31,
	2019		2018
Qualified Pension Plan -
Other long-term liabilities	$	26	$	26

Non-Qualified Pension Plans:
Other current liabilities	1		1
Other long-term liabilities	9		9

Other Postretirement Plans -
Other long-term liabilities	1		1

Schedule of Amounts Recognized in Balance Sheet

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



	As of
	March 31,		December 31,
	2019		2018
Qualified Pension Plan -
Other long-term liabilities	$	19	$	19

Non-Qualified Pension Plans:
Other current liabilities	1		1
Other long-term liabilities	7		7

Other Postretirement Plans -
Other long-term liabilities	13		13

XML 94 R58.htm IDEA: XBRL DOCUMENT

Asset Retirement Obligation Asset Retirement Obligations (Tables)

3 Months Ended

Mar. 31, 2019

Asset Retirement Obligations Disclosure [Line Items]

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

Asset Retirement Obligations

Asset Retirement Obligations Disclosure [Line Items]

Schedule of Asset Retirement Obligations [Table Text Block]

The following table presents MidAmerican Energy's ARO liabilities by asset type (in millions):



	As of
	March 31,		December 31,
	2019		2018

Quad Cities Station	$	348	$	345
Fossil-fueled generating facilities	328		93
Wind-powered generating facilities	125		123
Other	1		1
	$	802	$	562

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

The following table reconciles the beginning and ending balances of MidAmerican Energy's ARO liabilities for the three-month period ended March 31, 2019 (in millions):



Beginning balance	$	562
Change in estimated costs	234
Accretion	6
Ending balance	$	802

Reflected as:
Other current liabilities	$	67
Asset retirement obligations	735
	$	802

XML 95 R59.htm IDEA: XBRL DOCUMENT

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

3 Months Ended

Mar. 31, 2019

Derivative [Line Items]

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



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

As of March 31, 2019
Not designated as hedging contracts⁽¹⁾:
Commodity assets	$	37		$	8		$	6		$	1		$	52
Commodity liabilities	(8		)	—			(59		)	(64		)	(131		)
Total	29			8			(53		)	(63		)	(79		)

Total derivatives	29			8			(53		)	(63		)	(79		)
Cash collateral (payable) receivable	(3		)	—			16			39			52
Total derivatives - net basis	$	26		$	8		$	(37	)	$	(24	)	$	(27	)

As of December 31, 2018
Not designated as hedging contracts⁽¹⁾:
Commodity assets	$	36		$	4		$	10		$	1		$	51
Commodity liabilities	(9		)	(1		)	(67		)	(71		)	(148		)
Total	27			3			(57		)	(70		)	(97		)

Total derivatives	27			3			(57		)	(70		)	(97		)
Cash collateral (payable) receivable	(2		)	—			16			45			59
Total derivatives - net basis	$	25		$	3		$	(41	)	$	(25	)	$	(38	)


(1)	PacifiCorp's commodity derivatives are generally included in rates and as of March 31, 2019 and December 31, 2018, a regulatory asset of $78 million and $96 million, respectively, was recorded related to the net derivative liability of $79 million and $97 million, respectively.

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



	Three-Month Periods
	Ended March 31,
	2019			2018

Beginning balance	$	96		$	101
Changes in fair value	(54		)	28
Net (losses) gains reclassified to operating revenue	(22		)	7
Net gains (losses) reclassified to cost of fuel and energy	58			(14		)
Ending balance	$	78		$	122

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	2019		2018

Electricity sales, net	Megawatt hours	(4	)	(6	)
Natural gas purchases	Decatherms	110		117

XML 96 R60.htm IDEA: XBRL DOCUMENT

Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2019

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

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis

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



	Input Levels for Fair Value Measurements
	Level 1			Level 2			Level 3			Other⁽¹⁾			Total
As of March 31, 2019
Assets:
Commodity derivatives	$	—		$	82		$	100		$	(40	)	$	142
Interest rate derivatives	—			10			19			—			29
Mortgage loans held for sale	—			506			—			—			506
Money market mutual funds⁽²⁾	1,169			—			—			—			1,169
Debt securities:
United States government obligations	190			—			—			—			190
International government obligations	—			4			—			—			4
Corporate obligations	—			47			—			—			47
Municipal obligations	—			2			—			—			2
Agency, asset and mortgage-backed obligations	—			1			—			—			1
Equity securities:
United States companies	292			—			—			—			292
International companies	1,363			—			—			—			1,363
Investment funds	182			—			—			—			182
	$	3,196		$	652		$	119		$	(40	)	$	3,927
Liabilities:
Commodity derivatives	$	—		$	(162	)	$	(14	)	$	96		$	(80	)
Interest rate derivatives	(1		)	(17		)	(1		)	—			(19		)
	$	(1	)	$	(179	)	$	(15	)	$	96		$	(99	)



	Input Levels for Fair Value Measurements
	Level 1			Level 2			Level 3			Other⁽¹⁾			Total
As of December 31, 2018
Assets:
Commodity derivatives	$	1		$	91		$	108		$	(52	)	$	148
Interest rate derivatives	1			13			10			—			24
Mortgage loans held for sale	—			468			—			—			468
Money market mutual funds⁽²⁾	409			—			—			—			409
Debt securities:
United States government obligations	187			—			—			—			187
International government obligations	—			4			—			—			4
Corporate obligations	—			46			—			—			46
Municipal obligations	—			2			—			—			2
Agency, asset and mortgage-backed obligations	—			1			—			—			1
Equity securities:
United States companies	256			—			—			—			256
International companies	1,441			—			—			—			1,441
Investment funds	128			—			—			—			128
	$	2,423		$	625		$	118		$	(52	)	$	3,114
Liabilities:
Commodity derivatives	$	(1	)	$	(180	)	$	(9	)	$	111		$	(79	)
Interest rate derivatives	—			(32		)	—			—			(32		)
	$	(1	)	$	(212	)	$	(9	)	$	111		$	(111	)


(1)	Represents netting under master netting arrangements and a net cash collateral receivable of $56 million and $59 million as of March 31, 2019 and December 31, 2018, respectively.


(2)	Amounts are included in cash and cash equivalents; other current assets; and noncurrent investments and restricted cash and investments on the Consolidated Balance Sheets. The fair value of these money market mutual funds approximates cost.

Fair Value Assets and Liabilities Net Measured On Recurring Basis Unobservable Input Reconciliation

The following table reconciles the beginning and ending balances of the Company's assets and liabilities measured at fair value on a recurring basis using significant Level 3 inputs (in millions):



	Three-Month Periods
	Ended March 31,
				Interest
	Commodity			Rate
	Derivatives			Derivatives
2019:
Beginning balance	$	99		$	10
Changes included in earnings	(3		)	53
Changes in fair value recognized in net regulatory assets	(11		)	—
Purchases	1			—
Settlements	—			(45		)
Ending balance	$	86		$	18



2018:
Beginning balance	$	94		$	9
Changes included in earnings	—			30
Changes in fair value recognized in OCI	(1		)	—
Changes in fair value recognized in net regulatory assets	(9		)	—
Purchases	1			—
Settlements	(4		)	(23		)
Ending balance	$	81		$	16

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



	As of March 31, 2019				As of December 31, 2018
	Carrying		Fair		Carrying		Fair
	Value		Value		Value		Value

Long-term debt	$	37,916	$	42,154	$	36,250	$	38,874

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

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis

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



	Input Levels for Fair Value Measurements
	Level 1		Level 2		Level 3			Total
As of March 31, 2019
Assets:
Commodity derivatives	$	—	$	—	$	4		$	4
Money market mutual funds⁽¹⁾	43		—		—			43
Investment funds	2		—		—			2
	$	45	$	—	$	4		$	49

Liabilities - commodity derivatives	$	—	$	—	$	(9	)	$	(9	)

As of December 31, 2018
Assets:
Commodity derivatives	$	—	$	—	$	7		$	7
Money market mutual funds⁽¹⁾	104		—		—			104
Investment funds	1		—		—			1
	$	105	$	—	$	7		$	112

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


(1)	Amounts are included in cash and cash equivalents on the Consolidated Balance Sheets. The fair value of these money market mutual funds approximates cost.

Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation



	Three-Month Periods
	Ended March 31,
	2019			2018

Beginning balance	$	3		$	(3	)
Changes in fair value recognized in regulatory assets	(9		)	(5		)
Settlements	1			—
Ending balance	$	(5	)	$	(8	)

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



	As of March 31, 2019				As of December 31, 2018
	Carrying		Fair		Carrying		Fair
	Value		Value		Value		Value

Long-term debt	$	2,348	$	2,722	$	2,353	$	2,651

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

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis

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



	Input Levels for Fair Value Measurements
	Level 1		Level 2			Level 3		Other⁽¹⁾			Total
As of March 31, 2019
Assets:
Commodity derivatives	$	—	$	52		$	—	$	(18	)	$	34
Money market mutual funds⁽²⁾	468		—			—		—			468
Investment funds	24		—			—		—			24
	$	492	$	52		$	—	$	(18	)	$	526

Liabilities - Commodity derivatives	$	—	$	(131	)	$	—	$	70		$	(61	)

As of December 31, 2018
Assets:
Commodity derivatives	$	—	$	51		$	—	$	(23	)	$	28
Money market mutual funds⁽²⁾	69		—			—		—			69
Investment funds	24		—			—		—			24
	$	93	$	51		$	—	$	(23	)	$	121

Liabilities - Commodity derivatives	$	—	$	(148	)	$	—	$	82		$	(66	)


(1)	Represents netting under master netting arrangements and a net cash collateral receivable of $52 million and $59 million as of March 31, 2019 and December 31, 2018, respectively.


(2)	Amounts are included in cash and cash equivalents, other current assets and other assets on the Consolidated Balance Sheets. The fair value of these money market mutual funds approximates cost.



	As of March 31, 2019				As of December 31, 2018
	Carrying		Fair		Carrying		Fair
	Value		Value		Value		Value

Long-term debt	$	7,656	$	8,763	$	7,015	$	7,833

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

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis

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



	Input Levels for Fair Value Measurements
	Level 1		Level 2			Level 3			Other⁽¹⁾		Total
As of March 31, 2019:
Assets:
Commodity derivatives	$	—	$	1		$	—		$	—	$	1
Money market mutual funds⁽²⁾	410		—			—			—		410
Debt securities:
United States government obligations	190		—			—			—		190
International government obligations	—		4			—			—		4
Corporate obligations	—		47			—			—		47
Municipal obligations	—		2			—			—		2
Agency, asset and mortgage-backed obligations	—		1			—			—		1
Equity securities:
United States companies	292		—			—			—		292
International companies	7		—			—			—		7
Investment funds	19		—			—			—		19
	$	918	$	55		$	—		$	—	$	973

Liabilities - commodity derivatives	$	—	$	(3	)	$	(1	)	$	1	$	(3	)



	Input Levels for Fair Value Measurements
	Level 1		Level 2			Level 3			Other⁽¹⁾			Total
As of December 31, 2018:
Assets:
Commodity derivatives	$	—	$	4		$	2		$	(3	)	$	3
Money market mutual funds⁽²⁾	2		—			—			—			2
Debt securities:
United States government obligations	187		—			—			—			187
International government obligations	—		4			—			—			4
Corporate obligations	—		46			—			—			46
Municipal obligations	—		2			—			—			2
Agency, asset and mortgage-backed obligations	—		1			—			—			1
Equity securities:
United States companies	256		—			—			—			256
International companies	6		—			—			—			6
Investment funds	10		—			—			—			10
	$	461	$	57		$	2		$	(3	)	$	517

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


(1)	Represents netting under master netting arrangements and a net cash collateral receivable of $1 million and $- million as of March 31, 2019 and December 31, 2018, respectively.


(2)	Amounts are included in cash and cash equivalents and investments and restricted cash and investments on the Balance Sheets. The fair value of these money market mutual funds approximates cost.



	As of March 31, 2019				As of December 31, 2018
	Carrying Value		Fair Value		Carrying Value		Fair Value

Long-term debt	$	6,341	$	6,929	$	5,379	$	5,644

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

MidAmerican Funding's long-term debt is carried at cost on the Consolidated Financial Statements. The fair value of MidAmerican Funding's long-term debt is a Level 2 fair value measurement and has been estimated based upon quoted market prices, where available, or at the present value of future cash flows discounted at rates consistent with comparable maturities with similar credit risks. The carrying value of MidAmerican Funding's variable-rate long-term debt approximates fair value because of the frequent repricing of these instruments at market rates. The following table presents the carrying value and estimated fair value of MidAmerican Funding's long-term debt (in millions):



	As of March 31, 2019				As of December 31, 2018
	Carrying Value		Fair Value		Carrying Value		Fair Value

Long-term debt	$	6,581	$	7,236	$	5,619	$	5,941

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

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis

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



	Input Levels for Fair Value Measurements
	Level 1		Level 2		Level 3			Total
As of March 31, 2019
Assets:
Commodity derivatives	$	—	$	—	$	2		$	2
Money market mutual funds⁽¹⁾	34		—		—			34
	$	34	$	—	$	2		$	36

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

As of December 31, 2018
Assets:
Commodity derivatives	$	—	$	—	$	2		$	2
Money market mutual funds⁽¹⁾	45		—		—			45
	$	45	$	—	$	2		$	47


(1)	Amounts are included in cash and cash equivalents on the Balance Sheets. The fair value of these money market mutual funds approximates cost.

Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation

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



	As of March 31, 2019				As of December 31, 2018
	Carrying		Fair		Carrying		Fair
	Value		Value		Value		Value

Long-term debt	$	1,120	$	1,196	$	1,120	$	1,167

XML 97 R61.htm IDEA: XBRL DOCUMENT

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

3 Months Ended

Mar. 31, 2019

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

Energy Products and Services



	For the Three-Month Period Ended March 31, 2019
	PacifiCorp		MidAmerican Funding		NV Energy		Northern Powergrid		BHE Pipeline Group			BHE Transmission		BHE Renewables		BHE and Other⁽¹⁾			Total
Customer Revenue:
Regulated:
Retail electric	$	1,186	$	443	$	527	$	—	$	—		$	—	$	—	$	—		$	2,156
Retail gas	—		260		37		—		—			—		—		—			297
Wholesale	28		110		18		—		—			—		—		—			156
Transmission and distribution	25		16		24		230		—			167		—		—			462
Interstate pipeline	—		—		—		—		372			—		—		(37		)	335
Other	—		—		1		—		—			—		—		—			1
Total Regulated	1,239		829		607		230		372			167		—		(37		)	3,407
Nonregulated	—		6		—		8		—			1		126		139			280
Total Customer Revenue	1,239		835		607		238		372			168		126		102			3,687
Other revenue⁽²⁾	20		7		7		25		(1		)	—		41		39			138
Total	$	1,259	$	842	$	614	$	263	$	371		$	168	$	167	$	141		$	3,825



	For the Three-Month Period Ended March 31, 2018
	PacifiCorp		MidAmerican Funding		NV Energy		Northern Powergrid		BHE Pipeline Group		BHE Transmission		BHE Renewables		BHE and Other⁽¹⁾			Total
Customer Revenue:
Regulated:
Retail electric	$	1,096	$	386	$	539	$	—	$	—	$	—	$	—	$	—		$	2,021
Retail gas	—		246		40		—		—		—		—		—			286
Wholesale	22		93		11		—		—		—		—		(1		)	125
Transmission and distribution	22		16		20		249		—		180		—		—			487
Interstate pipeline	—		—		—		—		374		—		—		(41		)	333
Other	—		—		—		—		—		—		—		—			—
Total Regulated	1,140		741		610		249		374		180		—		(42		)	3,252
Nonregulated	—		—		—		11		—		—		117		144			272
Total Customer Revenue	1,140		741		610		260		374		180		117		102			3,524
Other revenue	44		6		7		18		2		—		37		41			155
Total	$	1,184	$	747	$	617	$	278	$	376	$	180	$	154	$	143		$	3,679

Remaining Performance Obligations

HomeServices [Member]

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



	HomeServices
	Three-Month Periods
	Ended March 31,
	2019		2018
Customer Revenue:
Brokerage	$	711	$	685
Franchise	14		15
Total Customer Revenue	725		700
Other revenue	60		61
Total	$	785	$	761

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



	Three-Month Periods
	Ended March 31,
	2019		2018
Customer Revenue:
Retail:
Residential	$	489	$	441
Commercial	360		342
Industrial	292		269
Other retail	29		25
Total retail	1,170		1,077
Wholesale	28		22
Transmission	25		22
Other Customer Revenue	16		19
Total Customer Revenue	1,239		1,140
Other revenue	20		44
Total operating revenue	$	1,259	$	1,184

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,
	2019		2018
Customer Revenue:
Retail:
Residential	$	200	$	193
Commercial	90		95
Industrial	70		79
Other	5		6
Total fully bundled	365		373
Distribution only service	7		7
Total retail	372		380
Wholesale, transmission and other	17		10
Total Customer Revenue	389		390
Other revenue	6		5
Total revenue	$	395	$	395



	Three-Month Periods
	Ended March 31,
	2019						2018
	Electric		Gas		Total		Electric		Gas		Total
Customer Revenue:
Retail:
Residential	$	68	$	24	$	92	$	68	$	26	$	94
Commercial	54		10		64		57		11		68
Industrial	39		3		42		39		3		42
Other	2		—		2		2		—		2
Total fully bundled	163		37		200		166		40		206
Distribution only service	1		—		1		1		—		1
Total retail	164		37		201		167		40		207
Wholesale, transmission and other	17		—		17		13		—		13
Total Customer Revenue	181		37		218		180		40		220
Other revenue	1		—		1		1		1		2
Total revenue	$	182	$	37	$	219	$	181	$	41	$	222

Accumulated Other Comprehensive Income (Loss) [Line Items]



	For the Three-Month Period Ended March 31, 2019
	Electric		Natural Gas		Other		Total
Customer Revenue:
Retail:
Residential	$	171	$	175	$	—	$	346
Commercial	75		66		—		141
Industrial	163		6		—		169
Natural gas transportation services	—		12		—		12
Other retail	35		1		—		36
Total retail	444		260		—		704
Wholesale	76		34		—		110
Multi-value transmission projects	16		—		—		16
Other Customer Revenue	—		—		5		5
Total Customer Revenue	536		294		5		835
Other revenue	6		1		—		7
Total operating revenue	$	542	$	295	$	5	$	842



	For the Three-Month Period Ended March 31, 2018
	Electric		Natural Gas			Other		Total
Customer Revenue:
Retail:
Residential	$	161	$	168		$	—	$	329
Commercial	71		62			—		133
Industrial	145		5			—		150
Natural gas transportation services	—		13			—		13
Other retail	10		(6		)	—		4
Total retail	387		242			—		629
Wholesale	62		32			—		94
Multi-value transmission projects	15		—			—		15
Other Customer Revenue	—		—			2		2
Total Customer Revenue	464		274			2		740
Other revenue	5		1			—		6
Total operating revenue	$	469	$	275		$	2	$	746

XML 98 R62.htm IDEA: XBRL DOCUMENT

Components of Accumulated Other Comprehensive Loss, Net (Tables)

3 Months Ended

Mar. 31, 2019

Components of Accumulated Other Comprehensive Loss, Net

The following table shows the change in AOCI attributable to BHE shareholders by each component of OCI, net of applicable income tax (in millions):



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

Balance, December 31, 2017	$	(383	)	$	(1,129	)	$	1,085		$	29		$	(398	)
Adoption of ASU 2016-01	—			—			(1,085		)	—			(1,085		)
Other comprehensive (loss) income	(3		)	73			—			(2		)	68
Balance, March 31, 2018	$	(386	)	$	(1,056	)	$	—		$	27		$	(1,415	)

Balance, December 31, 2018	$	(358	)	$	(1,623	)	$	—		$	36		$	(1,945	)
Other comprehensive (loss) income	(32		)	155			—			(8		)	115
Balance, March 31, 2019	$	(390	)	$	(1,468	)	$	—		$	28		$	(1,830	)

XML 99 R63.htm IDEA: XBRL DOCUMENT

Segment Information (Tables)

3 Months Ended

Mar. 31, 2019

Schedule of Segment Reporting Information, by Segment



	Three-Month Periods
	Ended March 31,
	2019		2018
Operating revenue:
PacifiCorp	$	1,259	$	1,184
MidAmerican Funding	842		747
NV Energy	614		617
Northern Powergrid	263		278
BHE Pipeline Group	371		376
BHE Transmission	168		180
BHE Renewables	167		154
HomeServices	785		761
BHE and Other⁽¹⁾	141		143
Total operating revenue	$	4,610	$	4,440



	Three-Month Periods
	Ended March 31,
	2019			2018
Depreciation and amortization:
PacifiCorp	$	205		$	202
MidAmerican Funding	177			158
NV Energy	120			113
Northern Powergrid	63			63
BHE Pipeline Group	28			42
BHE Transmission	58			62
BHE Renewables	70			64
HomeServices	13			12
BHE and Other⁽¹⁾	(1		)	—
Total depreciation and amortization	$	733		$	716



Operating income:
PacifiCorp	$	284		$	247
MidAmerican Funding	116			79
NV Energy	84			89
Northern Powergrid	129			147
BHE Pipeline Group	243			226
BHE Transmission	76			81
BHE Renewables	18			28
HomeServices	(21		)	(8		)
BHE and Other⁽¹⁾	(10		)	(18		)
Total operating income	919			871
Interest expense	(477		)	(466		)
Capitalized interest	16			12
Allowance for equity funds	32			21
Interest and dividend income	30			26
Losses on marketable securities, net	(68		)	(209		)
Other, net	35			30
Total income before income tax expense and equity income	$	487		$	285



Interest expense:
PacifiCorp	$	96	$	96
MidAmerican Funding	75		63
NV Energy	62		58
Northern Powergrid	34		37
BHE Pipeline Group	12		10
BHE Transmission	39		43
BHE Renewables	44		52
HomeServices	7		4
BHE and Other⁽¹⁾	108		103
Total interest expense	$	477	$	466



	Three-Month Periods
	Ended March 31,
	2019		2018
Operating revenue by country:
United States	$	4,177	$	3,978
United Kingdom	263		277
Canada	168		180
Philippines and other	2		5
Total operating revenue by country	$	4,610	$	4,440



Income before income tax expense and equity income by country:
United States	$	336	$	118
United Kingdom	103		112
Canada	40		41
Philippines and other	8		14
Total income before income tax expense and equity income by country	$	487	$	285



	As of
	March 31,		December 31,
	2019		2018
Assets:
PacifiCorp	$	24,211	$	23,478
MidAmerican Funding	20,845		20,029
NV Energy	14,105		14,119
Northern Powergrid	7,626		7,427
BHE Pipeline Group	5,579		5,511
BHE Transmission	8,567		8,424
BHE Renewables	8,654		8,666
HomeServices	3,427		2,797
BHE and Other⁽¹⁾	1,531		1,738
Total assets	$	94,545	$	92,189


(1)	The differences between the reportable segment amounts and the consolidated amounts, described as BHE and Other, relate principally to other entities, corporate functions and intersegment eliminations.

Schedule of Goodwill

e following table shows the change in the carrying amount of goodwill by reportable segment for the three-month period ended March 31, 2019 (in millions):



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

December 31, 2018	$	1,129	$	2,102	$	2,369	$	952	$	73	$	1,448	$	95	$	1,427	$	9,595
Acquisitions	—		—		—		—		—		—		—		23		23
Foreign currency translation	—		—		—		14		—		31		—		—		45
March 31, 2019	$	1,129	$	2,102	$	2,369	$	966	$	73	$	1,479	$	95	$	1,450	$	9,663

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,
	2019			2018
Operating revenue:
Regulated electric	$	542		$	469
Regulated natural gas	295			275
Other	5			2
Total operating revenue	$	842		$	746

Operating income:
Regulated electric	$	66		$	36
Regulated natural gas	48			43
Other	1			—
Total operating income	115			79
Interest expense	(69		)	(58		)
Allowance for borrowed funds	6			4
Allowance for equity funds	15			10
Other, net	20			9
Income before income tax benefit	$	87		$	44



	As of
	March 31, 2019		December 31, 2018
Assets:
Regulated electric	$	17,373	$	16,511
Regulated natural gas	1,357		1,406
Other	2		3
Total assets	$	18,732	$	17,920

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,
	2019			2018
Operating revenue:
Regulated electric	$	542		$	469
Regulated natural gas	295			275
Other	5			3
Total operating revenue	$	842		$	747

Operating income:
Regulated electric	$	66		$	36
Regulated natural gas	48			43
Other	2			—
Total operating income	116			79
Interest expense	(75		)	(63		)
Allowance for borrowed funds	6			4
Allowance for equity funds	15			10
Other, net	21			10
Income before income tax benefit	$	83		$	40



	As of
	March 31, 2019		December 31, 2018
Assets⁽¹⁾:
Regulated electric	$	18,564	$	17,702
Regulated natural gas	1,436		1,485
Other	17		15
Total assets	$	20,017	$	19,202



(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,
	2019			2018
Operating revenue:
Regulated electric	$	182		$	181
Regulated natural gas	37			41
Total operating revenue	$	219		$	222

Operating income:
Regulated electric	$	29		$	37
Regulated natural gas	8			10
Total operating income	37			47
Interest expense	(12		)	(10		)
Allowance for equity funds	1			1
Other, net	2			2
Income before income tax expense	$	28		$	40



	As of
	March 31,		December 31,
	2019		2018
Assets:
Regulated electric	$	3,227	$	3,177
Regulated natural gas	316		314
Regulated common assets⁽¹⁾	74		78
Total assets	$	3,617	$	3,569


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

XML 100 R64.htm IDEA: XBRL DOCUMENT

General (Details)	3 Months Ended
General (Details)	Mar. 31, 2019 OperatingSegments OwnedAndOperatedCompanies
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of reportable segments \| OperatingSegments	8
Number of owned and operated utility companies in the United States	4
Number of states owned and operated utility companies serve customers	11
Number of owned and operated interstate natural gas pipeline companies in the United States	2
Number of owned and operated electricity distribution companies in Great Britain	2
Number of owned and operated electricity transmission companies in Canada	1
Number of owned and operated renewable energy businesses	1
Number of owned and operated residential real estate brokerage firms in the United States	1
Number of owned and operated residential real estate brokerage franchise networks in the United States	1

XML 101 R65.htm IDEA: XBRL DOCUMENT

Investments and Restricted Cash and Investments (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Investments [Abstract]
Investments	$ 1,930		$ 1,974
Equity Method Investments [Abstract]
Equity Method Investments	2,411		2,440
Restricted Cash and Investments [Abstract]
Restricted cash and investments	741		760
Investments, including equity method investments and restricted cash and investments	5,082		5,174
Investments, including equity method investments and restricted cash and investments, current	205		271
Investments, including equity method investments and restricted cash and investments, noncurrent	4,877		4,903
Gain on Sale of Investments	(68)	$ (209)
Marketable Securities, Realized Gain (Loss)	0	2
Marketable Securities, Gain (Loss)	(68)	(211)
Quad Cities Station nuclear decommissioning trust funds [Member]
Restricted Cash and Investments [Abstract]
Decommissioning fund investments, fair value	545		504
Other restricted cash and investments [Member]
Restricted Cash and Investments [Abstract]
Restricted cash and investments	196		256
Equity Method Investments, tax equity investments [Member]
Equity Method Investments [Abstract]
Equity Method Investments	1,627		1,661
ETT [Member]
Equity Method Investments [Abstract]
Equity Method Investments	529		527
Bridger Coal Company [Member]
Equity Method Investments [Abstract]
Equity Method Investments	97		99
Other equity method investments [Member]
Equity Method Investments [Abstract]
Equity Method Investments	158		153
BYD Company Limited common stock [Member]
Investments [Abstract]
Available-for-sale securities, equity securities	1,356		1,435
Rabbi trusts [Member]
Investments [Abstract]
Rabbi trusts, amount	394		371
Other investments [Member]
Investments [Abstract]
Other investments	$ 180		$ 168
Retained Earnings [Member]
Investments And Restricted Cash And Investments [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification		$ 1,085

XML 102 R66.htm IDEA: XBRL DOCUMENT

Property, Plant and Equipment, Net (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Property, plant and equipment in service, net	$ 65,560	$ 64,977
Construction in Progress, Gross	3,388	3,110
Property, plant and equipment, net	68,948	68,087
Regulated Operation [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment	85,206	84,231
Accumulated depreciation and amortization	(26,253)	(25,894)
Property, plant and equipment in service, net	58,953	58,337
Construction in Progress, Gross	3,200	2,900
Regulated Operation [Member] \| Utility generation, transmission and distribution systems
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 77,659	76,707
Regulated Operation [Member] \| Utility generation, transmission and distribution systems \| Minimum [Member]
Property, Plant and Equipment [Line Items]
Depreciable Life	5 years
Regulated Operation [Member] \| Utility generation, transmission and distribution systems \| Maximum [Member]
Property, Plant and Equipment [Line Items]
Depreciable Life	80 years
Regulated Operation [Member] \| Interstate natural gas pipeline assets
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 7,547	7,524
Regulated Operation [Member] \| Interstate natural gas pipeline assets \| Minimum [Member]
Property, Plant and Equipment [Line Items]
Depreciable Life	3 years
Regulated Operation [Member] \| Interstate natural gas pipeline assets \| Maximum [Member]
Property, Plant and Equipment [Line Items]
Depreciable Life	80 years
Unregulated Operation [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 8,318	8,250
Accumulated depreciation and amortization	(1,711)	(1,610)
Property, plant and equipment in service, net	6,607	6,640
Unregulated Operation [Member] \| Independent power plants
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 6,844	6,826
Unregulated Operation [Member] \| Independent power plants \| Minimum [Member]
Property, Plant and Equipment [Line Items]
Depreciable Life	5 years
Unregulated Operation [Member] \| Independent power plants \| Maximum [Member]
Property, Plant and Equipment [Line Items]
Depreciable Life	30 years
Unregulated Operation [Member] \| Other assets
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 1,474	$ 1,424
Unregulated Operation [Member] \| Other assets \| Minimum [Member]
Property, Plant and Equipment [Line Items]
Depreciable Life	3 years
Unregulated Operation [Member] \| Other assets \| Maximum [Member]
Property, Plant and Equipment [Line Items]
Depreciable Life	30 years

XML 103 R67.htm IDEA: XBRL DOCUMENT

Property, Plant and Equipment, Net - PacifiCorp (Details) - PacifiCorp [Member] - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Electric Property Plant And Equipment In Service Gross	$ 28,455	$ 28,399
Public utility accumulated depreciation and amortization	(10,105)	(10,034)
Public Utilities Property, Plant And Equipment In Service, Net	18,350	18,365
Public Utilities, Property, Plant and Equipment, Net, Excluding Construction Work In Progress	18,360	18,375
Public Utilities, Property, Plant and Equipment, Construction Work in Progress	1,338	1,195
Public Utilities, Property, Plant and Equipment, Net	$ 19,698	19,570
Minimum [Member]
Property, Plant and Equipment [Line Items]
Depreciable Life	5 years
Maximum [Member]
Property, Plant and Equipment [Line Items]
Depreciable Life	75 years
Unregulated Operation [Member]
Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Net, Excluding Construction Work In Progress	$ 10	$ 10

XML 104 R68.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, 2019	Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Net, Excluding Construction Work In Progress	$ 15,434	$ 15,122
Public Utilities, Property, Plant and Equipment, Construction Work in Progress	1,111	1,035
Property, plant and equipment, net	16,545	16,157
Regulated Operation [Member]
Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Plant in Service, Excluding Construction Work In Progress	21,504	21,057
Public Utilities, Property, Plant and Equipment, Accumulated Depreciation	(6,076)	(5,941)
Public Utilities, Property, Plant and Equipment, Net, Excluding Construction Work In Progress	15,428	15,116
Unregulated Operation [Member]
Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Accumulated Depreciation	(1)	(1)
Public Utilities, Property, Plant and Equipment, Net, Excluding Construction Work In Progress	6	6
Gross public utility property, plant and equipment in service	$ 7	7
Unregulated Operation [Member] \| Minimum [Member]
Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Other Property Plant and Equipment, Useful Life	20 years
Unregulated Operation [Member] \| Maximum [Member]
Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Other Property Plant and Equipment, Useful Life	50 years
Electric Operations [Member] \| Regulated Operation [Member]
Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Generation or Processing	$ 14,092	13,727
Public Utilities, Property, Plant and Equipment, Transmission	1,946	1,934
Public Utilities, Property, Plant and Equipment, Distribution	$ 3,732	3,672
Electric Operations [Member] \| Regulated Operation [Member] \| Minimum [Member]
Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Generation, Useful Life	20 years
Public Utilities, Property, Plant and Equipment, Transmission, Useful Life	52 years
Public Utilities, Property, Plant and Equipment, Distribution, Useful Life	20 years
Electric Operations [Member] \| Regulated Operation [Member] \| Maximum [Member]
Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Generation, Useful Life	70 years
Public Utilities, Property, Plant and Equipment, Transmission, Useful Life	75 years
Public Utilities, Property, Plant and Equipment, Distribution, Useful Life	75 years
Natural Gas Processing Plant [Member] \| Regulated Operation [Member]
Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Distribution	$ 1,734	$ 1,724
Natural Gas Processing Plant [Member] \| Regulated Operation [Member] \| Minimum [Member]
Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Distribution, Useful Life	29 years
Natural Gas Processing Plant [Member] \| Regulated Operation [Member] \| Maximum [Member]
Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Distribution, Useful Life	75 years

XML 105 R69.htm IDEA: XBRL DOCUMENT

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

XML 106 R70.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, 2019	Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Net, Excluding Construction Work In Progress	$ 6,318	$ 6,321
Public Utilities, Property, Plant and Equipment, Construction Work in Progress	125	97
Property, plant and equipment, net	6,443	6,418
Regulated Operation [Member]
Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Generation or Processing	3,725	3,720
Public Utilities, Property, Plant and Equipment, Distribution	3,436	3,411
Public Utilities, Property, Plant and Equipment, Transmission	1,441	1,439
Public Utilities, Property, Plant and Equipment, Other Property, Plant and Equipment	710	716
Public Utilities, Property, Plant and Equipment, Plant in Service, Excluding Construction Work In Progress	9,312	9,286
Public Utilities, Property, Plant and Equipment, Accumulated Depreciation	2,995	2,966
Public Utilities, Property, Plant and Equipment, Net, Excluding Construction Work In Progress	$ 6,317	6,320
Regulated Operation [Member] \| Minimum [Member]
Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Generation, Useful Life	30 years
Public Utilities, Property, Plant and Equipment, Distribution, Useful Life	20 years
Public Utilities, Property, Plant and Equipment, Transmission, Useful Life	45 years
Public Utilities, Property, Plant and Equipment, Other Property Plant and Equipment, Useful Life	5 years
Regulated Operation [Member] \| Maximum [Member]
Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Generation, Useful Life	55 years
Public Utilities, Property, Plant and Equipment, Distribution, Useful Life	65 years
Public Utilities, Property, Plant and Equipment, Transmission, Useful Life	70 years
Public Utilities, Property, Plant and Equipment, Other Property Plant and Equipment, Useful Life	65 years
Unregulated Operation [Member]
Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Net, Excluding Construction Work In Progress	$ 1	$ 1
Unregulated Operation [Member] \| Minimum [Member]
Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Other Property Plant and Equipment, Useful Life	45 years
Unregulated Operation [Member] \| Maximum [Member]
Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Other Property Plant and Equipment, Useful Life	45 years

XML 107 R71.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, 2019	Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Net, Excluding Construction Work In Progress	$ 2,869	$ 2,857
Property, plant and equipment, net	2,965	2,947
Common Facilities [Member]
Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Construction Work in Progress	96	90
Property, plant and equipment, net	2,965	2,947
Regulated Operation [Member] \| Electricity Generation Plant, Non-Nuclear [Member]
Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Generation or Processing	1,132	1,132
Public Utilities, Property, Plant and Equipment, Distribution	1,588	1,568
Public Utilities, Property, Plant and Equipment, Transmission	818	812
Public Utilities, Property, Plant and Equipment, Other Property, Plant and Equipment	$ 174	185
Regulated Operation [Member] \| Electricity Generation Plant, Non-Nuclear [Member] \| Minimum [Member]
Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Generation, Useful Life	25 years
Public Utilities, Property, Plant and Equipment, Distribution, Useful Life	20 years
Public Utilities, Property, Plant and Equipment, Transmission, Useful Life	50 years
Public Utilities, Property, Plant and Equipment, Other Property Plant and Equipment, Useful Life	5 years
Regulated Operation [Member] \| Electricity Generation Plant, Non-Nuclear [Member] \| Maximum [Member]
Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Generation, Useful Life	60 years
Public Utilities, Property, Plant and Equipment, Distribution, Useful Life	100 years
Public Utilities, Property, Plant and Equipment, Transmission, Useful Life	100 years
Public Utilities, Property, Plant and Equipment, Other Property Plant and Equipment, Useful Life	70 years
Regulated Operation [Member] \| Natural Gas Processing Plant [Member]
Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Distribution	$ 405	403
Public Utilities, Property, Plant and Equipment, Other Property, Plant and Equipment	$ 14	14
Regulated Operation [Member] \| Natural Gas Processing Plant [Member] \| Minimum [Member]
Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Distribution, Useful Life	35 years
Public Utilities, Property, Plant and Equipment, Other Property Plant and Equipment, Useful Life	5 years
Regulated Operation [Member] \| Natural Gas Processing Plant [Member] \| Maximum [Member]
Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Distribution, Useful Life	70 years
Public Utilities, Property, Plant and Equipment, Other Property Plant and Equipment, Useful Life	70 years
Regulated Operation [Member] \| Common Facilities [Member]
Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Common	$ 318	321
Public Utilities, Property, Plant and Equipment, Plant in Service, Excluding Construction Work In Progress	4,449	4,435
Public Utilities, Property, Plant and Equipment, Accumulated Depreciation	1,585	1,583
Public Utilities, Property, Plant and Equipment, Net, Excluding Construction Work In Progress	$ 2,864	2,852
Regulated Operation [Member] \| Common Facilities [Member] \| Minimum [Member]
Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Common, Useful Life	5 years
Regulated Operation [Member] \| Common Facilities [Member] \| Maximum [Member]
Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Common, Useful Life	70 years
Unregulated Operation [Member]
Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Net, Excluding Construction Work In Progress	$ 5	$ 5
Unregulated Operation [Member] \| Minimum [Member]
Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Other Property Plant and Equipment, Useful Life	70 years
Unregulated Operation [Member] \| Maximum [Member]
Property, Plant and Equipment [Line Items]
Public Utilities, Property, Plant and Equipment, Other Property Plant and Equipment, Useful Life	70 years

XML 108 R72.htm IDEA: XBRL DOCUMENT

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

XML 109 R73.htm IDEA: XBRL DOCUMENT

Cash and Cash Equivalents and Restricted Cash and Cash Equivalents Supplemental Cash Flow Disclosure (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018	Dec. 31, 2017
Condensed Cash Flow Statements, Captions [Line Items]
Cash and cash equivalents	$ 1,661	$ 627
Restricted cash and cash equivalents	181	227
Restricted Cash and Cash Equivalents, Noncurrent	15	29
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	$ 1,857	$ 883	$ 1,876	$ 1,283

XML 110 R74.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, 2019	Dec. 31, 2018	Mar. 31, 2018	Dec. 31, 2017
Condensed Cash Flow Statements, Captions [Line Items]
Cash and cash equivalents	$ 1,661	$ 627
Restricted cash and cash equivalents	181	227
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	1,857	883	$ 1,876	$ 1,283
MidAmerican Energy Company [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Cash and cash equivalents	432	0
Restricted cash and cash equivalents	47	56
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	$ 479	$ 56	$ 478	$ 282

XML 111 R75.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, 2019	Dec. 31, 2018	Mar. 31, 2018	Dec. 31, 2017
Condensed Cash Flow Statements, Captions [Line Items]
Cash and cash equivalents	$ 1,661	$ 627
Restricted cash and cash equivalents	181	227
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	1,857	883	$ 1,876	$ 1,283
MidAmerican Funding, LLC and Subsidiaries [Domain]
Condensed Cash Flow Statements, Captions [Line Items]
Cash and cash equivalents	433	1
Restricted cash and cash equivalents	47	56
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	$ 480	$ 57	$ 478	$ 282

XML 112 R76.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, 2019	Dec. 31, 2018	Mar. 31, 2018	Dec. 31, 2017
Condensed Cash Flow Statements, Captions [Line Items]
Cash and cash equivalents	$ 1,661	$ 627
Restricted cash and cash equivalents	181	227
Restricted Cash and Cash Equivalents, Noncurrent	15	29
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	1,857	883	$ 1,876	$ 1,283
PacifiCorp [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Cash and cash equivalents	669	77
Restricted cash and cash equivalents	13	13
Restricted Cash and Cash Equivalents, Noncurrent	2	2
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	$ 684	$ 92	$ 32	$ 29

XML 113 R77.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, 2019	Dec. 31, 2018	Mar. 31, 2018	Dec. 31, 2017
Condensed Cash Flow Statements, Captions [Line Items]
Cash and cash equivalents	$ 1,661	$ 627
Restricted cash and cash equivalents	181	227
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	1,857	883	$ 1,876	$ 1,283
Nevada Power Company [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Cash and cash equivalents	51	111
Restricted cash and cash equivalents	11	10
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	$ 62	$ 121	$ 107	$ 66

XML 114 R78.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, 2019	Dec. 31, 2018	Mar. 31, 2018	Dec. 31, 2017
Condensed Cash Flow Statements, Captions [Line Items]
Cash and cash equivalents	$ 1,661	$ 627
Restricted cash and cash equivalents	181	227
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	1,857	883	$ 1,876	$ 1,283
Sierra Pacific Power Company [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Cash and cash equivalents	62	71
Restricted cash and cash equivalents	6	5
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	$ 68	$ 76	$ 38	$ 8

XML 115 R79.htm IDEA: XBRL DOCUMENT

Leases Leases - Summary (Details) $ in Millions	Mar. 31, 2019 USD ($)
Leases [Abstract]
Operating Lease, Right-of-Use Asset	$ 544
Finance Lease, Right-of-Use Asset	509
Total Right-of-Use Asset	1,053
Operating Lease, Liability	586
Finance Lease, Liability	522
Total Lease Liabilities	$ 1,108

XML 116 R80.htm IDEA: XBRL DOCUMENT

Leases Leases - Lease Costs (Details) $ in Millions	3 Months Ended
Leases Leases - Lease Costs (Details) $ in Millions	Mar. 31, 2019 USD ($)
Leases [Abstract]
Variable Lease, Cost	$ 144
Operating Lease, Cost	41
Finance Lease, Right-of-Use Asset, Amortization	4
Finance Lease, Interest Expense	11
Short-term Lease, Cost	1
Lease, Cost	$ 201
Operating Lease, Weighted Average Remaining Lease Term	7 years 6 months
Finance Lease, Weighted Average Remaining Lease Term	29 years 6 months
Operating Lease, Weighted Average Discount Rate, Percent	5.30%
Finance Lease, Weighted Average Discount Rate, Percent	8.70%

XML 117 R81.htm IDEA: XBRL DOCUMENT

Leases Leases - Other (Details) $ in Millions	3 Months Ended
Leases Leases - Other (Details) $ in Millions	Mar. 31, 2019 USD ($)
Leases [Abstract]
Operating Lease, Payments	$ (37)
Finance Lease, Interest Payment on Liability	(12)
Finance Lease, Principal Payments	(5)
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	12
Right-of-Use Asset Obtained in Exchange for Finance Lease Liability	$ 1

XML 118 R82.htm IDEA: XBRL DOCUMENT

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

Mar. 31, 2019

Dec. 31, 2018

Operating Lease Liabilities, Payments Due [Abstract]

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

$ 115

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

138

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

116

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

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

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

198

Lessee, Operating Lease, Liability, Undiscounted Excess Amount

725

(139)

Finance Lease Liabilities, Payments, Due [Abstract]

586

Finance Lease, Liability, Payments, Remainder of Fiscal Year

Finance Lease, Liability, Payments, Due after Year Five

775

1,093

Finance Lease, Liability, Undiscounted Excess Amount

522

(571)

Lease, Liability, Payments, Remainder of Fiscal Year

168

$ 216

^[1]

206

196

^[1]

190

183

^[1]

159

154

^[1]

122

117

^[1]

973

931

^[1]

1,818

1,797

^[1]

(710)

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

$ 1,108

Operating Leases, Future Minimum Payments Due, Next Twelve Months

^[1]

147

Operating Leases, Future Minimum Payments, Due in Two Years

^[1]

128

Operating Leases, Future Minimum Payments, Due in Three Years

^[1]

110

Operating Leases, Future Minimum Payments, Due in Four Years

^[1]

Operating Leases, Future Minimum Payments, Due in Five Years

^[1]

Operating Leases, Future Minimum Payments, Due Thereafter

^[1]

159

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

^[1]

692

Capital Leases, Future Minimum Payments Due, Next Twelve Months

^[1]

Capital Leases, Future Minimum Payments Due in Two Years

^[1]

Capital Leases, Future Minimum Payments Due in Three Years

^[1]

Capital Leases, Future Minimum Payments Due in Four Years

^[1]

Capital Leases, Future Minimum Payments Due in Five Years

^[1]

Capital Leases, Future Minimum Payments Due Thereafter

^[1]

772

Operating Lease Liabilities, Payments Due [Abstract]

^[1]

$ 1,105

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

XML 119 R83.htm IDEA: XBRL DOCUMENT

Leases Leases - PacifiCorp - Summary (Details) $ in Millions	Mar. 31, 2019 USD ($)
Lessee, Lease, Description [Line Items]
Operating Lease, Right-of-Use Asset	$ 544
Finance Lease, Right-of-Use Asset	509
Total Right-of-Use Asset	1,053
Operating Lease, Liability	586
Finance Lease, Liability	522
Total Lease Liabilities	1,108
PacifiCorp [Member]
Lessee, Lease, Description [Line Items]
Operating Lease, Right-of-Use Asset	14
Finance Lease, Right-of-Use Asset	20
Total Right-of-Use Asset	34
Operating Lease, Liability	14
Finance Lease, Liability	20
Total Lease Liabilities	$ 34

XML 120 R84.htm IDEA: XBRL DOCUMENT

Leases Leases - PacifiCorp - Lease Costs (Details) $ in Millions	3 Months Ended
	Mar. 31, 2019 USD ($)
Lessee, Lease, Description [Line Items]
Variable Lease, Cost	$ 144
Operating Lease, Cost	41
Finance Lease, Right-of-Use Asset, Amortization	4
Finance Lease, Interest Expense	11
Short-term Lease, Cost	1
Lease, Cost	$ 201
Operating Lease, Weighted Average Remaining Lease Term	7 years 6 months
Finance Lease, Weighted Average Remaining Lease Term	29 years 6 months
Operating Lease, Weighted Average Discount Rate, Percent	5.30%
Finance Lease, Weighted Average Discount Rate, Percent	8.70%
PacifiCorp [Member]
Lessee, Lease, Description [Line Items]
Variable Lease, Cost	$ 9
Operating Lease, Cost	1
Finance Lease, Interest Expense	1
Lease, Cost	$ 11
Operating Lease, Weighted Average Remaining Lease Term	13 years 7 months 6 days
Finance Lease, Weighted Average Remaining Lease Term	9 years 8 months 12 days
Operating Lease, Weighted Average Discount Rate, Percent	3.70%
Finance Lease, Weighted Average Discount Rate, Percent	10.60%

XML 121 R85.htm IDEA: XBRL DOCUMENT

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

Mar. 31, 2019

Dec. 31, 2018

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

$ 115

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

138

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

116

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

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

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

198

Lessee, Operating Lease, Liability, Undiscounted Excess Amount

725

(139)

Finance Lease Liabilities, Payments, Due [Abstract]

586

Finance Lease, Liability, Payments, Remainder of Fiscal Year

Finance Lease, Liability, Payments, Due after Year Five

775

Finance Lease, Liability, Undiscounted Excess Amount

1,093

(571)

Lease, Liability, Payments, Remainder of Fiscal Year

522

168

$ 216

^[1]

206

196

^[1]

190

183

^[1]

159

154

^[1]

122

117

^[1]

973

931

^[1]

1,818

1,797

^[1]

(710)

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

1,108

Operating Leases, Future Minimum Payments Due, Next Twelve Months

^[1]

147

Operating Leases, Future Minimum Payments, Due in Two Years

^[1]

128

Operating Leases, Future Minimum Payments, Due in Three Years

^[1]

110

Operating Leases, Future Minimum Payments, Due in Four Years

^[1]

Operating Leases, Future Minimum Payments, Due in Five Years

^[1]

Operating Leases, Future Minimum Payments, Due Thereafter

^[1]

159

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

^[1]

692

Capital Leases, Future Minimum Payments Due, Next Twelve Months

^[1]

Capital Leases, Future Minimum Payments Due in Two Years

^[1]

Capital Leases, Future Minimum Payments Due in Three Years

^[1]

Capital Leases, Future Minimum Payments Due in Four Years

^[1]

Capital Leases, Future Minimum Payments Due in Five Years

^[1]

Capital Leases, Future Minimum Payments Due Thereafter

^[1]

772

^[1]

1,105

Operating Lease Liabilities, Payments Due [Abstract]

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

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

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

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

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

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

Lessee, Operating Lease, Liability, Undiscounted Excess Amount

(4)

Finance Lease Liabilities, Payments, Due [Abstract]

Finance Lease, Liability, Payments, Remainder of Fiscal Year

Finance Lease, Liability, Payments, Due after Year Five

Finance Lease, Liability, Undiscounted Excess Amount

(14)

Lease, Liability, Payments, Remainder of Fiscal Year

(18)

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

$ 34

Operating Leases, Future Minimum Payments Due, Next Twelve Months

Operating Leases, Future Minimum Payments, Due in Two Years

Operating Leases, Future Minimum Payments, Due in Three Years

Operating Leases, Future Minimum Payments, Due in Four Years

Operating Leases, Future Minimum Payments, Due in Five Years

Operating Leases, Future Minimum Payments, Due Thereafter

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

Capital Leases, Future Minimum Payments Due, Next Twelve Months

Capital Leases, Future Minimum Payments Due in Two Years

Capital Leases, Future Minimum Payments Due in Three Years

Capital Leases, Future Minimum Payments Due in Four Years

Capital Leases, Future Minimum Payments Due in Five Years

Capital Leases, Future Minimum Payments Due Thereafter

Operating Lease Liabilities, Payments Due [Abstract]

$ 36

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

XML 122 R86.htm IDEA: XBRL DOCUMENT

Leases Leases - NPC - Summary (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Lessee, Lease, Description [Line Items]
Operating Lease, Right-of-Use Asset	$ 544
Finance Lease, Right-of-Use Asset	509
Total Right-of-Use Asset	1,053
Operating Lease, Liability	586
Finance Lease, Liability	522
Total Lease Liabilities	1,108
Nevada Power Company [Member]
Lessee, Lease, Description [Line Items]
Operating Lease, Right-of-Use Asset	15
Finance Lease, Right-of-Use Asset	449	$ 450
Total Right-of-Use Asset	464
Operating Lease, Liability	18
Finance Lease, Liability	462
Total Lease Liabilities	$ 480

XML 123 R87.htm IDEA: XBRL DOCUMENT

Leases Leases - NPC - Lease Costs (Details) $ in Millions	3 Months Ended
Leases Leases - NPC - Lease Costs (Details) $ in Millions	Mar. 31, 2019 USD ($)
Lessee, Lease, Description [Line Items]
Variable Lease, Cost	$ 144
Operating Lease, Cost	41
Finance Lease, Right-of-Use Asset, Amortization	4
Finance Lease, Interest Expense	11
Short-term Lease, Cost	1
Lease, Cost	$ 201
Operating Lease, Weighted Average Remaining Lease Term	7 years 6 months
Finance Lease, Weighted Average Remaining Lease Term	29 years 6 months
Operating Lease, Weighted Average Discount Rate, Percent	5.30%
Finance Lease, Weighted Average Discount Rate, Percent	8.70%
Nevada Power Company [Member]
Lessee, Lease, Description [Line Items]
Variable Lease, Cost	$ 108
Operating Lease, Cost	1
Finance Lease, Right-of-Use Asset, Amortization	3
Finance Lease, Interest Expense	10
Lease, Cost	$ 122
Operating Lease, Weighted Average Remaining Lease Term	8 years 1 month 6 days
Finance Lease, Weighted Average Remaining Lease Term	31 years 3 months 18 days
Operating Lease, Weighted Average Discount Rate, Percent	4.50%
Finance Lease, Weighted Average Discount Rate, Percent	8.70%

XML 124 R88.htm IDEA: XBRL DOCUMENT

Leases Leases - NPC - Other (Details) $ in Millions	3 Months Ended
Leases Leases - NPC - Other (Details) $ in Millions	Mar. 31, 2019 USD ($)
Lessee, Lease, Description [Line Items]
Operating Lease, Payments	$ (37)
Finance Lease, Interest Payment on Liability	(12)
Finance Lease, Principal Payments	(5)
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	12
Right-of-Use Asset Obtained in Exchange for Finance Lease Liability	1
Nevada Power Company [Member]
Lessee, Lease, Description [Line Items]
Operating Lease, Payments	(1)
Finance Lease, Interest Payment on Liability	(11)
Finance Lease, Principal Payments	(3)
Right-of-Use Asset Obtained in Exchange for Finance Lease Liability	$ 1

XML 125 R89.htm IDEA: XBRL DOCUMENT

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

Mar. 31, 2019

Dec. 31, 2018

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

$ 115

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

138

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

116

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

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

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

198

Lessee, Operating Lease, Liability, Undiscounted Excess Amount

725

(139)

Finance Lease Liabilities, Payments, Due [Abstract]

586

Finance Lease, Liability, Payments, Remainder of Fiscal Year

Finance Lease, Liability, Payments, Due after Year Five

775

Finance Lease, Liability, Undiscounted Excess Amount

1,093

(571)

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

522

Operating Leases, Future Minimum Payments Due, Next Twelve Months

^[1]

$ 147

Operating Leases, Future Minimum Payments, Due in Two Years

^[1]

128

Operating Leases, Future Minimum Payments, Due in Three Years

^[1]

110

Operating Leases, Future Minimum Payments, Due in Four Years

^[1]

Operating Leases, Future Minimum Payments, Due in Five Years

^[1]

Operating Leases, Future Minimum Payments, Due Thereafter

^[1]

159

Lease, Liability, Payments, Remainder of Fiscal Year

^[1]

692

168

216

^[1]

206

196

^[1]

190

183

^[1]

159

154

^[1]

122

117

^[1]

973

931

^[1]

1,818

1,797

^[1]

(710)

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

1,108

Capital Leases, Future Minimum Payments Due, Next Twelve Months

^[1]

Capital Leases, Future Minimum Payments Due in Two Years

^[1]

Capital Leases, Future Minimum Payments Due in Three Years

^[1]

Capital Leases, Future Minimum Payments Due in Four Years

^[1]

Capital Leases, Future Minimum Payments Due in Five Years

^[1]

Capital Leases, Future Minimum Payments Due Thereafter

^[1]

772

^[1]

1,105

Operating Lease Liabilities, Payments Due [Abstract]

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

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

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

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

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

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

Lessee, Operating Lease, Liability, Undiscounted Excess Amount

(4)

Finance Lease Liabilities, Payments, Due [Abstract]

Finance Lease, Liability, Payments, Remainder of Fiscal Year

Finance Lease, Liability, Payments, Due after Year Five

711

Finance Lease, Liability, Undiscounted Excess Amount

987

(525)

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

462

Operating Leases, Future Minimum Payments Due, Next Twelve Months

Operating Leases, Future Minimum Payments, Due in Two Years

Operating Leases, Future Minimum Payments, Due in Three Years

Operating Leases, Future Minimum Payments, Due in Four Years

Operating Leases, Future Minimum Payments, Due in Five Years

Operating Leases, Future Minimum Payments, Due Thereafter

Lease, Liability, Payments, Remainder of Fiscal Year

721

719

1,009

1,022

(529)

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

$ 480

Capital Leases, Future Minimum Payments Due, Next Twelve Months

Capital Leases, Future Minimum Payments Due in Two Years

Capital Leases, Future Minimum Payments Due in Three Years

Capital Leases, Future Minimum Payments Due in Four Years

Capital Leases, Future Minimum Payments Due in Five Years

Capital Leases, Future Minimum Payments Due Thereafter

709

Operating Lease Liabilities, Payments Due [Abstract]

$ 998

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

XML 126 R90.htm IDEA: XBRL DOCUMENT

Leases Leases - SPPC - Summary (Details) $ in Millions	Mar. 31, 2019 USD ($)
Lessee, Lease, Description [Line Items]
Operating Lease, Right-of-Use Asset	$ 544
Finance Lease, Right-of-Use Asset	509
Total Right-of-Use Asset	1,053
Operating Lease, Liability	586
Finance Lease, Liability	522
Total Lease Liabilities	1,108
Sierra Pacific Power Company [Member]
Lessee, Lease, Description [Line Items]
Operating Lease, Right-of-Use Asset	19
Finance Lease, Right-of-Use Asset	38
Total Right-of-Use Asset	57
Operating Lease, Liability	19
Finance Lease, Liability	39
Total Lease Liabilities	$ 58

XML 127 R91.htm IDEA: XBRL DOCUMENT

Leases Leases - SPPC - Lease Costs (Details) $ in Millions	3 Months Ended
Leases Leases - SPPC - Lease Costs (Details) $ in Millions	Mar. 31, 2019 USD ($)
Lessee, Lease, Description [Line Items]
Variable Lease, Cost	$ 144
Operating Lease, Cost	41
Finance Lease, Right-of-Use Asset, Amortization	4
Finance Lease, Interest Expense	11
Short-term Lease, Cost	1
Lease, Cost	$ 201
Operating Lease, Weighted Average Remaining Lease Term	7 years 6 months
Finance Lease, Weighted Average Remaining Lease Term	29 years 6 months
Operating Lease, Weighted Average Discount Rate, Percent	5.30%
Finance Lease, Weighted Average Discount Rate, Percent	8.70%
Sierra Pacific Power Company [Member]
Lessee, Lease, Description [Line Items]
Variable Lease, Cost	$ 15
Operating Lease, Cost	0
Finance Lease, Right-of-Use Asset, Amortization	1
Finance Lease, Interest Expense	1
Lease, Cost	$ 17
Operating Lease, Weighted Average Remaining Lease Term	25 years 8 months 12 days
Finance Lease, Weighted Average Remaining Lease Term	23 years 9 months 18 days
Operating Lease, Weighted Average Discount Rate, Percent	4.90%
Finance Lease, Weighted Average Discount Rate, Percent	7.30%

XML 128 R92.htm IDEA: XBRL DOCUMENT

Leases Leases - SPPC - Other (Details) $ in Millions	3 Months Ended
Leases Leases - SPPC - Other (Details) $ in Millions	Mar. 31, 2019 USD ($)
Lessee, Lease, Description [Line Items]
Finance Lease, Interest Payment on Liability	$ (12)
Sierra Pacific Power Company [Member]
Lessee, Lease, Description [Line Items]
Finance Lease, Interest Payment on Liability	$ (1)

XML 129 R93.htm IDEA: XBRL DOCUMENT

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

Mar. 31, 2019

Dec. 31, 2018

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

$ 115

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

138

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

116

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

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

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

198

Lessee, Operating Lease, Liability, Undiscounted Excess Amount

725

(139)

Finance Lease Liabilities, Payments, Due [Abstract]

586

Finance Lease, Liability, Payments, Remainder of Fiscal Year

Finance Lease, Liability, Payments, Due after Year Five

775

Finance Lease, Liability, Undiscounted Excess Amount

1,093

(571)

Lease, Liability, Payments, Remainder of Fiscal Year

522

168

$ 216

^[1]

206

196

^[1]

190

183

^[1]

159

154

^[1]

122

117

^[1]

973

931

^[1]

1,818

1,797

^[1]

(710)

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

1,108

Operating Leases, Future Minimum Payments Due, Next Twelve Months

^[1]

147

Operating Leases, Future Minimum Payments, Due in Two Years

^[1]

128

Operating Leases, Future Minimum Payments, Due in Three Years

^[1]

110

Operating Leases, Future Minimum Payments, Due in Four Years

^[1]

Operating Leases, Future Minimum Payments, Due in Five Years

^[1]

Operating Leases, Future Minimum Payments, Due Thereafter

^[1]

159

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

^[1]

692

Capital Leases, Future Minimum Payments Due, Next Twelve Months

^[1]

Capital Leases, Future Minimum Payments Due in Two Years

^[1]

Capital Leases, Future Minimum Payments Due in Three Years

^[1]

Capital Leases, Future Minimum Payments Due in Four Years

^[1]

Capital Leases, Future Minimum Payments Due in Five Years

^[1]

Capital Leases, Future Minimum Payments Due Thereafter

^[1]

772

^[1]

1,105

Operating Lease Liabilities, Payments Due [Abstract]

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

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

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

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

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

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

Lessee, Operating Lease, Liability, Undiscounted Excess Amount

(16)

Finance Lease Liabilities, Payments, Due [Abstract]

Finance Lease, Liability, Payments, Remainder of Fiscal Year

Finance Lease, Liability, Payments, Due after Year Five

Finance Lease, Liability, Undiscounted Excess Amount

(30)

Lease, Liability, Payments, Remainder of Fiscal Year

104

106

(46)

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

$ 58

Operating Leases, Future Minimum Payments Due, Next Twelve Months

Operating Leases, Future Minimum Payments, Due in Two Years

Operating Leases, Future Minimum Payments, Due in Three Years

Operating Leases, Future Minimum Payments, Due in Four Years

Operating Leases, Future Minimum Payments, Due in Five Years

Operating Leases, Future Minimum Payments, Due Thereafter

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

Capital Leases, Future Minimum Payments Due, Next Twelve Months

Capital Leases, Future Minimum Payments Due in Two Years

Capital Leases, Future Minimum Payments Due in Three Years

Capital Leases, Future Minimum Payments Due in Four Years

Capital Leases, Future Minimum Payments Due in Five Years

Capital Leases, Future Minimum Payments Due Thereafter

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

$ 70

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

XML 130 R94.htm IDEA: XBRL DOCUMENT

Recent Financing Transactions Recent Financing Transactions - Long-Term Debt (Details) - USD ($) $ in Millions	Mar. 31, 2019	Feb. 28, 2019	Jan. 31, 2019
PacifiCorp [Member] \| PAC First Mortgage Bonds, 3.50, Due 2029 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 400
Debt Instrument, Interest Rate, Stated Percentage	3.50%
PacifiCorp [Member] \| PAC First Mortgage Bonds, 4.15, Due 2050 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 600
Debt Instrument, Interest Rate, Stated Percentage	4.15%
PacifiCorp [Member] \| PAC First Mortgage Bonds, 5.50, Due 2019 [Member]
Debt Instrument [Line Items]
Debt Instrument, Repurchase Amount	$ 350
Debt Instrument, Interest Rate, Stated Percentage	5.50%
MidAmerican Energy Company [Member] \| MEC First Mortgage Bonds, 2.40%, Due March 2019 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		2.40%
Debt Instrument, Repurchased Face Amount		$ 500
MidAmerican Energy Company [Member] \| MEC First Mortgage Bonds, 3.65%, Due April 2029 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount			$ 600
Debt Instrument, Interest Rate, Stated Percentage			3.65%
MidAmerican Energy Company [Member] \| MEC First Mortgage Bonds, 4.25%, Due July 2049 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount			$ 900
Debt Instrument, Interest Rate, Stated Percentage			4.25%
NVE Holdings [Member] \| Nevada Power Company [Member] \| NPC General and Refunding Mortgage Notes, Series CC [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount			$ 500
Debt Instrument, Interest Rate, Stated Percentage			3.70%
NVE Holdings [Member] \| Nevada Power Company [Member] \| NPC General and Refunding Mortgage Notes, Series V [Member]
Debt Instrument [Line Items]
Debt Instrument, Repurchase Amount			$ 500
Debt Instrument, Interest Rate, Stated Percentage			7.13%

XML 131 R95.htm IDEA: XBRL DOCUMENT

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

XML 132 R96.htm IDEA: XBRL DOCUMENT

Recent Financing Transactions Recent Financing Transactions - MEC (Details) - MidAmerican Energy Company [Member] - USD ($) $ in Millions	Feb. 28, 2019	Jan. 31, 2019
MEC First Mortgage Bonds, 3.65%, Due April 2029 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount		$ 600
Debt Instrument, Interest Rate, Stated Percentage		3.65%
MEC First Mortgage Bonds, 4.25%, Due July 2049 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount		$ 900
Debt Instrument, Interest Rate, Stated Percentage		4.25%
MEC First Mortgage Bonds, 2.40%, Due March 2019 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	2.40%
Debt Instrument, Repurchased Face Amount	$ 500

XML 133 R97.htm IDEA: XBRL DOCUMENT

Recent Financing Transactions Recent Financing Transactions - NPC (Details) - Nevada Power Company [Member] - NVE Holdings [Member] $ in Millions	Jan. 31, 2019 USD ($)
NPC General and Refunding Mortgage Notes, Series CC [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 500
Debt Instrument, Interest Rate, Stated Percentage	3.70%
NPC General and Refunding Mortgage Notes, Series V [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	7.13%
Debt Instrument, Repurchase Amount	$ 500

XML 134 R98.htm IDEA: XBRL DOCUMENT

Recent Financing Transactions Recent Financing Transactions - SPPC (Details) - Subsequent Event [Member] - NVE Holdings [Member] - Sierra Pacific Power Company [Member] $ in Millions	Apr. 09, 2019 USD ($)
Water facilities refunding revenue bonds, series 2016C, due 2036 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 30
Water facilities refunding revenue bonds, series 2016D, due 2036 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 25
Debt Instrument, Interest Rate, Stated Percentage	2.05%
Water facilities refunding revenue bonds, series 2016E, due 2036 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 25
Debt Instrument, Interest Rate, Stated Percentage	2.05%
Pollution Control Revenue Bonds, Variable-Rate, Series 2006B due 2036 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 30
Debt Instrument, Interest Rate, Stated Percentage	1.85%
Water facilities refunding revenue bonds, series 2016F, due 2036 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 75
Debt Instrument, Interest Rate, Stated Percentage	2.05%
Water facilities refunding revenue bonds, series 2016G, due 2036 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 20
Debt Instrument, Interest Rate, Stated Percentage	1.85%

XML 135 R99.htm IDEA: XBRL DOCUMENT

Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended
Income Taxes (Details) - USD ($) $ in Millions	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
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	(29.00%)	(45.00%)
State income tax, net of federal income tax benefit	(17.00%)	(30.00%)
Income tax effect of foreign income	(3.00%)	(16.00%)
Effects of ratemaking	(3.00%)	(8.00%)
Equity income	(1.00%)	1.00%
Other, net	2.00%	(1.00%)
Effective income tax rate	(30.00%)	(78.00%)
Production Tax Credit Carryforwards [Abstract]
Years eligible for federal renewable energy production tax credit	10 years
Related Party Tax Expense [Abstract]
Long-term income tax receivable	$ (457)		$ (457)
Parent Company [Member]
Related Party Tax Expense [Abstract]
Related party transaction, cash received for income taxes, net	$ 0	$ 0

XML 136 R100.htm IDEA: XBRL DOCUMENT

Income Taxes - PAC (Details)	3 Months Ended
Income Taxes - PAC (Details)	Mar. 31, 2019	Mar. 31, 2018
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	17.00%	30.00%
Effective Income Tax Rate Reconciliation, Tax Credit, Percent	(29.00%)	(45.00%)
Effects of ratemaking	(3.00%)	(8.00%)
Other, net	(2.00%)	1.00%
Effective income tax rate	30.00%	78.00%
Production Tax Credit Carryforwards [Abstract]
Years eligible for federal renewable energy production tax credit	10 years
PacifiCorp [Member]
Schedule of Effective Income Tax Rate Reconciliation [Line Items]
Federal statutory income tax rate	21.00%	21.00%
State income tax, net of federal income tax benefit	3.00%	4.00%
Effective Income Tax Rate Reconciliation, Tax Credit, Percent	(4.00%)	(5.00%)
Effects of ratemaking	(1.00%)	(4.00%)
Other, net	0.00%	2.00%
Effective income tax rate	19.00%	14.00%
Production Tax Credit Carryforwards [Abstract]
Years eligible for federal renewable energy production tax credit	10 years

XML 137 R101.htm IDEA: XBRL DOCUMENT

Income Taxes - MEC (Details) - USD ($) $ in Millions	3 Months Ended
Income Taxes - MEC (Details) - USD ($) $ in Millions	Mar. 31, 2019	Mar. 31, 2018
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	(29.00%)	(45.00%)
State income tax, net of federal income tax benefit	(17.00%)	(30.00%)
Effects of ratemaking	(3.00%)	(8.00%)
Other, net	2.00%	(1.00%)
Effective income tax rate	30.00%	78.00%
Production Tax Credit Carryforwards [Abstract]
Years eligible for federal renewable energy production tax credit	10 years
MidAmerican Energy Company [Member]
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Abstract]
Federal statutory income tax rate	21.00%	21.00%
Effective Income Tax Rate Reconciliation, Tax Credit, Percent	(113.00%)	(137.00%)
State income tax, net of federal income tax benefit	(21.00%)	(9.00%)
Effects of ratemaking	(8.00%)	(18.00%)
Other, net	(1.00%)	2.00%
Effective income tax rate	(122.00%)	(141.00%)
Production Tax Credit Carryforwards [Abstract]
Years eligible for federal renewable energy production tax credit	10 years
Recognized production tax credits	$ 98	$ 60
MidAmerican Energy Company [Member] \| Berkshire Hathaway Energy [Member]
Related Party Income Tax Receivable (Payable) [Abstract]
Related party transaction, cash received for income taxes, net		$ 14
Production Tax Credit Recognition [Member] \| MidAmerican Energy Company [Member]
Production Tax Credit Carryforwards [Abstract]
Recognized production tax credits	$ 30

XML 138 R102.htm IDEA: XBRL DOCUMENT

Income Taxes - MidAmerican Funding (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
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	(29.00%)	(45.00%)
State income tax, net of federal income tax benefit	(17.00%)	(30.00%)
Effects of ratemaking	(3.00%)	(8.00%)
Other, net	2.00%	(1.00%)
Effective income tax rate	30.00%	78.00%
Production Tax Credit Carryforwards [Abstract]
Years eligible for federal renewable energy production tax credit	10 years
MidAmerican Funding, LLC and Subsidiaries [Domain]
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Abstract]
Federal statutory income tax rate	21.00%	21.00%
Effective Income Tax Rate Reconciliation, Tax Credit, Percent	(118.00%)	(151.00%)
State income tax, net of federal income tax benefit	(22.00%)	(10.00%)
Effects of ratemaking	(9.00%)	(20.00%)
Other, net	(1.00%)	2.00%
Effective income tax rate	(129.00%)	(158.00%)
Production Tax Credit Carryforwards [Abstract]
Years eligible for federal renewable energy production tax credit	10 years
Recognized production tax credits	$ 98	$ 60
MidAmerican Funding, LLC and Subsidiaries [Domain] \| Berkshire Hathaway Energy [Member]
Related Party Income Tax Receivable (Payable) [Abstract]
Related party transaction, cash received for income taxes, net		$ 14
Production Tax Credit Recognition [Member] \| MidAmerican Funding, LLC and Subsidiaries [Domain]
Production Tax Credit Carryforwards [Abstract]
Recognized production tax credits	$ 30

XML 139 R103.htm IDEA: XBRL DOCUMENT

Income Taxes Income Taxes - NPC (Details)	3 Months Ended
Income Taxes Income Taxes - NPC (Details)	Mar. 31, 2019	Mar. 31, 2018
Schedule of Effective Income Tax Rate Reconciliation [Line Items]
Federal statutory income tax rate	21.00%	21.00%
Effective Income Tax Rate Reconciliation Regulatory Differences	3.00%	8.00%
Other, net	(2.00%)	1.00%
Effective income tax rate	30.00%	78.00%
Nevada Power Company [Member]
Schedule of Effective Income Tax Rate Reconciliation [Line Items]
Federal statutory income tax rate	21.00%
Effective Income Tax Rate Reconciliation Regulatory Differences	2.00%
Other, net	(2.00%)
Effective income tax rate	21.00%

XML 140 R104.htm IDEA: XBRL DOCUMENT

Income Taxes Income Taxes - SPPC (Details)	3 Months Ended
Income Taxes Income Taxes - SPPC (Details)	Mar. 31, 2019	Mar. 31, 2018
Schedule of Effective Income Tax Rate Reconciliation [Line Items]
Federal statutory income tax rate	21.00%	21.00%
Effects of ratemaking	(3.00%)	(8.00%)
Other, net	(2.00%)	1.00%
Effective income tax rate	30.00%	78.00%
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	(0.00%)	5.00%
Other, net	0.00%	(1.00%)
Effective income tax rate	21.00%	15.00%

XML 141 R105.htm IDEA: XBRL DOCUMENT

Employee Benefit Plans (Details) - USD ($) $ in Millions	3 Months Ended
Employee Benefit Plans (Details) - USD ($) $ in Millions	Mar. 31, 2019	Mar. 31, 2018
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 2	$ 2
Interest cost	6	6
Expected return on plan assets	(10)	(10)
Net amortization	(2)	(3)
Net periodic benefit cost	(4)	(5)
Domestic Plan [Member] \| Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	4	5
Interest cost	27	26
Expected return on plan assets	(38)	(41)
Net amortization	9	8
Net periodic benefit cost	2	(2)
UNITED KINGDOM \| Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	4	5
Interest cost	13	14
Expected return on plan assets	(25)	(27)
Net amortization	9	15
Net periodic benefit cost	$ 1	$ 7

XML 142 R106.htm IDEA: XBRL DOCUMENT

Employee Benefit Plans - Employer Contributions (Details) - 3 months ended Mar. 31, 2019 £ in Millions, $ in Millions	USD ($)	GBP (£)	GBP (£)
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, expected contributions in current fiscal year	$ 1
Domestic Plan [Member] \| Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, expected contributions in current fiscal year	13
Employer contributions	3
UNITED KINGDOM \| Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, expected contributions in current fiscal year \| £			£ 44
Employer contributions	$ 14	£ 11

XML 143 R107.htm IDEA: XBRL DOCUMENT

Employee Benefit Plans Employee Benefit Plans - PacifiCorp (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 2	$ 2
Interest cost	6	6
Expected return on plan assets	(10)	(10)
Net amortization	(2)	(3)
Net periodic benefit cost	(4)	(5)
PacifiCorp [Member] \| Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	0	0
Interest cost	3	3
Expected return on plan assets	(5)	(5)
Net amortization	0	(1)
Net periodic benefit cost	(2)	(3)
Domestic Plan [Member] \| Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	4	5
Interest cost	27	26
Expected return on plan assets	(38)	(41)
Net amortization	9	8
Net periodic benefit cost	2	(2)
Domestic Plan [Member] \| PacifiCorp [Member] \| Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	0	0
Interest cost	11	11
Expected return on plan assets	(17)	(18)
Net amortization	3	3
Net periodic benefit cost	$ (3)	$ (4)

XML 144 R108.htm IDEA: XBRL DOCUMENT

Employee Benefit Plans Employee Benefit Plans - PacifiCorp - Employer Contributions (Details) $ in Millions	3 Months Ended
	Mar. 31, 2019 USD ($)
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, expected contributions in current fiscal year	$ 1
Domestic Plan [Member] \| Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, expected contributions in current fiscal year	13
Employer contributions	3
Domestic Plan [Member] \| PacifiCorp [Member] \| Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, expected contributions in current fiscal year	4
Employer contributions	$ 1

XML 145 R109.htm IDEA: XBRL DOCUMENT

Employee Benefit Plans - MEC (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Pension Plan [Member] \| Domestic Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 4	$ 5
Interest cost	27	26
Expected return on plan assets	(38)	(41)
Net amortization	9	8
Net periodic benefit cost	2	(2)
Pension Plan [Member] \| Domestic Plan [Member] \| MidAmerican Energy Company [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	2	2
Interest cost	7	7
Expected return on plan assets	(10)	(11)
Net amortization	0	1
Net periodic benefit cost	(1)	(1)
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	2	2
Interest cost	6	6
Expected return on plan assets	(10)	(10)
Net amortization	(2)	(3)
Net periodic benefit cost	(4)	(5)
Other Postretirement Benefits Plan [Member] \| MidAmerican Energy Company [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	1	1
Interest cost	2	2
Expected return on plan assets	(3)	(3)
Net amortization	(1)	(1)
Net periodic benefit cost	$ (1)	$ (1)

XML 146 R110.htm IDEA: XBRL DOCUMENT

Employee Benefit Plans Employee Benefit Plans - MEC - Employer Contributions (Details) $ in Millions	3 Months Ended
	Mar. 31, 2019 USD ($)
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, expected contributions in current fiscal year	$ 1
MidAmerican Energy Company [Member] \| Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, expected contributions in current fiscal year	1
Employer contributions	0
Domestic Plan [Member] \| Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, expected contributions in current fiscal year	13
Employer contributions	3
Domestic Plan [Member] \| MidAmerican Energy Company [Member] \| Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, expected contributions in current fiscal year	7
Employer contributions	$ 2

XML 147 R111.htm IDEA: XBRL DOCUMENT

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

XML 148 R112.htm IDEA: XBRL DOCUMENT

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

XML 149 R113.htm IDEA: XBRL DOCUMENT

Asset Retirement Obligation Asset Retirement Obligations - MEC - Asset Retirement Obligations By Type (Details) - MidAmerican Energy Company [Member] - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Asset Retirement Obligations By Type [Line Items]
Asset Retirement Obligation	$ 802	$ 562
Quad Cities Unit Nos 1 and 2 [Member]
Asset Retirement Obligations By Type [Line Items]
Asset Retirement Obligation	348	345
Fossil Fuel Plant [Member]
Asset Retirement Obligations By Type [Line Items]
Asset Retirement Obligation	328	93
Wind Generating Facility [Member]
Asset Retirement Obligations By Type [Line Items]
Asset Retirement Obligation	125	123
Other Plant in Service [Member]
Asset Retirement Obligations By Type [Line Items]
Asset Retirement Obligation	$ 1	$ 1

XML 150 R114.htm IDEA: XBRL DOCUMENT

Asset Retirement Obligation Asset Retirement Obligations - MEC - Change in Asset Retirement Obligations (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Dec. 31, 2018
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Asset Retirement Obligation, Accretion Expense	$ 6
MidAmerican Energy Company [Member]
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Asset Retirement Obligation	562
Asset Retirement Obligation, Revision of Estimate	234
Asset Retirement Obligation	802
Asset Retirement Obligation, Current	67
Asset Retirement Obligations, Noncurrent	735	$ 552
Fossil Fuel Plant [Member] \| MidAmerican Energy Company [Member]
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Asset Retirement Obligation	93
Asset Retirement Obligation, Revision of Estimate	237
Asset Retirement Obligation	$ 328

XML 151 R115.htm IDEA: XBRL DOCUMENT

Asset Retirement Obligation Asset Retirement Obligations (Details) - MidAmerican Energy Company [Member] $ in Millions	3 Months Ended
	Mar. 31, 2019 USD ($)
Asset Retirement Obligations Disclosure [Line Items]
Asset Retirement Obligation, Revision of Estimate	$ 234
Fossil Fuel Plant [Member]
Asset Retirement Obligations Disclosure [Line Items]
Asset Retirement Obligation, Revision of Estimate	$ 237

XML 152 R116.htm IDEA: XBRL DOCUMENT

Risk Management and Hedging Activities - PacifiCorp - Balance Sheet Location (Details) - PacifiCorp [Member] - Commodity derivative [Member] - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018	Dec. 31, 2017
Derivatives, Fair Value [Line Items]
Derivative, fair value, net	$ (79)	$ (97)
Cash collateral, net receivable, offset against derivative positions	52	59
Derivative assets (liabilities), at fair value, net	(27)	(38)
Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative, fair value, net	29	27
Cash collateral, net receivable, offset against derivative positions	(3)	(2)
Derivative assets (liabilities), at fair value, net	26	25
Other Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative, fair value, net	8	3
Cash collateral, net receivable, offset against derivative positions	0	0
Derivative assets (liabilities), at fair value, net	8	3
Other Current Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative, fair value, net	(53)	(57)
Cash collateral, net receivable, offset against derivative positions	16	16
Derivative assets (liabilities), at fair value, net	(37)	(41)
Other Noncurrent Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative, fair value, net	(63)	(70)
Cash collateral, net receivable, offset against derivative positions	39	45
Derivative assets (liabilities), at fair value, net	(24)	(25)
Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative asset, fair value, gross asset including not subject to master netting arrangement	52	51
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement	(131)	(148)
Derivative, fair value, net	(79)	(97)
Net Regulatory Asset (Liability), Unrealized Loss (Gain) On Derivative Contracts	78	96	$ 122	$ 101
Not Designated as Hedging Instrument [Member] \| Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative asset, fair value, gross asset including not subject to master netting arrangement	37	36
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement	(8)	(9)
Derivative, fair value, net	29	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	8	4
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement	0	(1)
Derivative, fair value, net	8	3
Not Designated as Hedging Instrument [Member] \| Other Current Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative asset, fair value, gross asset including not subject to master netting arrangement	6	10
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement	(59)	(67)
Derivative, fair value, net	(53)	(57)
Not Designated as Hedging Instrument [Member] \| Other Noncurrent Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative asset, fair value, gross asset including not subject to master netting arrangement	1	1
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement	(64)	(71)
Derivative, fair value, net	$ (63)	$ (70)

XML 153 R117.htm IDEA: XBRL DOCUMENT

Risk Management and Hedging Activities - PacifiCorp - Not Designated as Hedging Contracts (Details) - PacifiCorp [Member] - Not Designated as Hedging Instrument [Member] - Commodity derivative [Member] - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Regulatory Assets (Liabilities), Net, Unrealized Loss (Gain), Net, on Derivative Instruments [Line Items]
Beginning balance	$ 96	$ 101
Changes in fair value recognized in net regulatory assets	(54)	28
Net (losses) gains reclassified to operating revenue	(22)	7
Net Gains (Losses) Reclassified To Cost Of Domestic Regulated Electric	58	(14)
Ending balance	$ 78	$ 122

XML 154 R118.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, 2019 Dth MWh	Dec. 31, 2018 Dth MWh
Electricity sales, net
Notional Amounts of Outstanding Derivative Positions [Line Items]
Derivative, nonmonetary notional amount \| MWh	4	6
Natural gas purchases
Notional Amounts of Outstanding Derivative Positions [Line Items]
Derivative, nonmonetary notional amount \| Dth	110	117

XML 155 R119.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, 2019	Dec. 31, 2018
Derivative [Line Items]
Derivative, net liability position, aggregate fair value	$ 101	$ 113
Collateral already posted, aggregate fair value	55	61
Additional collateral, aggregate fair value	$ 32	$ 35

XML 156 R120.htm IDEA: XBRL DOCUMENT

Fair Value Measurements (Details) - USD ($) $ in Millions	3 Months Ended
Fair Value Measurements (Details) - USD ($) $ in Millions	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018	Dec. 31, 2017
Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset	$ (40)		$ (52)
Assets, fair value disclosure	3,927		3,114
Derivative liability, fair value, gross asset and right to reclaim cash, offset	96		111
Derivative liabilities	(99)		(111)
Cash collateral, net receivable, offset against derivative positions	56		59
Recurring [Member] \| Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value disclosure	3,196		2,423
Derivative liabilities	(1)		(1)
Recurring [Member] \| Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value disclosure	652		625
Derivative liabilities	(179)		(212)
Recurring [Member] \| Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value disclosure	119		118
Derivative liabilities	(15)		(9)
Mortgage Loans on Real Estate [Member] \| Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgages Held-for-sale, Fair Value Disclosure	506		468
Mortgage Loans on Real Estate [Member] \| Recurring [Member] \| Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgages Held-for-sale, Fair Value Disclosure	0		0
Mortgage Loans on Real Estate [Member] \| Recurring [Member] \| Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgages Held-for-sale, Fair Value Disclosure	506		468
Mortgage Loans on Real Estate [Member] \| Recurring [Member] \| Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgages Held-for-sale, Fair Value Disclosure	0		0
Money market mutual funds [Member] \| Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI	1,169		409
Money market mutual funds [Member] \| Recurring [Member] \| Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI	1,169		409
Money market mutual funds [Member] \| Recurring [Member] \| Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI	0		0
Money market mutual funds [Member] \| Recurring [Member] \| Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI	0		0
United States government obligations [Member] \| Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	190		187
United States government obligations [Member] \| Recurring [Member] \| Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	190		187
United States government obligations [Member] \| Recurring [Member] \| Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	0		0
United States government obligations [Member] \| Recurring [Member] \| Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	0		0
International government obligations [Member] \| Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	4		4
International government obligations [Member] \| Recurring [Member] \| Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	0		0
International government obligations [Member] \| Recurring [Member] \| Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	4		4
International government obligations [Member] \| Recurring [Member] \| Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	0		0
Corporate obligations [Member] \| Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	47		46
Corporate obligations [Member] \| Recurring [Member] \| Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	0		0
Corporate obligations [Member] \| Recurring [Member] \| Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	47		46
Corporate obligations [Member] \| Recurring [Member] \| Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	0		0
Municipal obligations [Member] \| Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	2		2
Municipal obligations [Member] \| Recurring [Member] \| Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	0		0
Municipal obligations [Member] \| Recurring [Member] \| Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	2		2
Municipal obligations [Member] \| Recurring [Member] \| Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	0		0
US Government-sponsored Enterprises Debt Securities [Member] \| Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	1		1
US Government-sponsored Enterprises Debt Securities [Member] \| Recurring [Member] \| Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	0		0
US Government-sponsored Enterprises Debt Securities [Member] \| Recurring [Member] \| Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	1		1
US Government-sponsored Enterprises Debt Securities [Member] \| Recurring [Member] \| Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	0		0
United States companies [Member] \| Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI	292		256
United States companies [Member] \| Recurring [Member] \| Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI	292		256
United States companies [Member] \| Recurring [Member] \| Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI	0		0
United States companies [Member] \| Recurring [Member] \| Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI	0		0
International companies [Member] \| Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI	1,363		1,441
International companies [Member] \| Recurring [Member] \| Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI	1,363		1,441
International companies [Member] \| Recurring [Member] \| Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI	0		0
International companies [Member] \| Recurring [Member] \| Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI	0		0
Investment funds [Member] \| Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI	182		128
Investment funds [Member] \| Recurring [Member] \| Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI	182		128
Investment funds [Member] \| Recurring [Member] \| Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI	0		0
Investment funds [Member] \| Recurring [Member] \| Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI	0		0
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	(40)		(52)
Derivative assets	142		148
Derivative liability, fair value, gross asset and right to reclaim cash, offset	96		111
Derivative liabilities	(80)		(79)
Commodity derivative [Member] \| Recurring [Member] \| Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative asset, fair value, gross asset including not subject to master netting arrangement	0		1
Derivative liability, fair value, gross liability including not subject to master netting arrangement	0		(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	82		91
Derivative liability, fair value, gross liability including not subject to master netting arrangement	(162)		(180)
Commodity derivative [Member] \| Recurring [Member] \| Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative asset, fair value, gross asset including not subject to master netting arrangement	100		108
Derivative liability, fair value, gross liability including not subject to master netting arrangement	(14)		(9)
Interest Rate Contract [Member] \| Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	29		24
Derivative liabilities	(19)		(32)
Interest Rate Contract [Member] \| Recurring [Member] \| Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative asset, fair value, gross asset including not subject to master netting arrangement	0		1
Derivative liability, fair value, gross liability including not subject to master netting arrangement	(1)		0
Interest Rate Contract [Member] \| Recurring [Member] \| Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative asset, fair value, gross asset including not subject to master netting arrangement	10		13
Derivative liability, fair value, gross liability including not subject to master netting arrangement	(17)		(32)
Interest Rate Contract [Member] \| Recurring [Member] \| Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative asset, fair value, gross asset including not subject to master netting arrangement	19		10
Derivative liability, fair value, gross liability including not subject to master netting arrangement	(1)		0
Commodity derivative [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Measurement With Unobservable Inputs Reconciliation, Recurring Basis, Asset (Liability), Net, Value	86	$ 81	99	$ 94
Fair Value, Assets and Liabilities Measured on Recurring Basis, Gain (Loss) Included in Earnings	3	0
Fair Value, Measurements with Unobservable Inputs Reconciliation, Recurring Basis, Gain (Loss) Included In Regulatory Assets and Liabilities, Net	11	9
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases	1	1
Fair Value, Measurements With Unobservable Inputs Reconciliation, Recurring Basis, Assets and Liability, Net, Settlements	0	4
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	18	16	$ 10	$ 9
Fair Value, Assets and Liabilities Measured on Recurring Basis, Gain (Loss) Included in Earnings	(53)	(30)
Fair Value, Measurements with Unobservable Inputs Reconciliation, Recurring Basis, Gain (Loss) Included In Regulatory Assets and Liabilities, Net	0	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases	0	0
Fair Value, Measurements With Unobservable Inputs Reconciliation, Recurring Basis, Assets and Liability, Net, Settlements	$ 45	$ 23

XML 157 R121.htm IDEA: XBRL DOCUMENT

Fair Value Measurements - Level 3 (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Commodity derivative [Member]
Fair Value, Assets (Liabilities), Net, Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	$ 99	$ 94
Changes included in earnings	(3)	0
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	(11)	(9)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases	1	1
Settlements	0	(4)
Ending balance	86	81
Interest Rate Lock Commitments [Member]
Fair Value, Assets (Liabilities), Net, Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	10	9
Changes included in earnings	53	30
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	0
Settlements	(45)	(23)
Ending balance	$ 18	$ 16

XML 158 R122.htm IDEA: XBRL DOCUMENT

Fair Value Measurements - Debt (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, carrying value	$ 37,916	$ 36,250
Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, fair value	$ 42,154	$ 38,874

XML 159 R123.htm IDEA: XBRL DOCUMENT

Fair Value Measurements - PacifiCorp (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset	$ (40)	$ (52)
Assets, fair value disclosure	3,927	3,114
Derivative liability, fair value, gross asset and right to reclaim cash, offset	96	111
Derivative Liability	(99)	(111)
Cash collateral, net receivable, offset against derivative positions	56	59
Recurring [Member] \| Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value disclosure	3,196	2,423
Derivative Liability	(1)	(1)
Recurring [Member] \| Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value disclosure	652	625
Derivative Liability	(179)	(212)
Recurring [Member] \| Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value disclosure	119	118
Derivative Liability	(15)	(9)
Commodity derivative [Member] \| Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset	(40)	(52)
Derivative assets	142	148
Derivative liability, fair value, gross asset and right to reclaim cash, offset	96	111
Derivative Liability	(80)	(79)
Commodity derivative [Member] \| Recurring [Member] \| Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative asset, fair value, gross asset including not subject to master netting arrangement	0	1
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement	0	(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	82	91
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement	(162)	(180)
Commodity derivative [Member] \| Recurring [Member] \| Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative asset, fair value, gross asset including not subject to master netting arrangement	100	108
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement	(14)	(9)
Money market mutual funds [Member] \| Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI	1,169	409
Money market mutual funds [Member] \| Recurring [Member] \| Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI	1,169	409
Money market mutual funds [Member] \| Recurring [Member] \| Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI	0	0
Money market mutual funds [Member] \| Recurring [Member] \| Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI	0	0
Investment funds [Member] \| Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI	182	128
Investment funds [Member] \| Recurring [Member] \| Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI	182	128
Investment funds [Member] \| Recurring [Member] \| Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI	0	0
Investment funds [Member] \| Recurring [Member] \| Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI	0	0
PacifiCorp [Member] \| Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value disclosure	526	121
PacifiCorp [Member] \| Recurring [Member] \| Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value disclosure	492	93
PacifiCorp [Member] \| Recurring [Member] \| Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value disclosure	52	51
PacifiCorp [Member] \| Recurring [Member] \| Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value disclosure	0	0
PacifiCorp [Member] \| Commodity derivative [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash collateral, net receivable, offset against derivative positions	52	59
PacifiCorp [Member] \| Commodity derivative [Member] \| Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset	(18)	(23)
Derivative assets	34	28
Derivative liability, fair value, gross asset and right to reclaim cash, offset	70	82
Derivative Liability	(61)	(66)
Cash collateral, net receivable, offset against derivative positions	52	59
PacifiCorp [Member] \| Commodity derivative [Member] \| Recurring [Member] \| Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative asset, fair value, gross asset including not subject to master netting arrangement	0	0
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement	0	0
PacifiCorp [Member] \| Commodity derivative [Member] \| Recurring [Member] \| Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative asset, fair value, gross asset including not subject to master netting arrangement	52	51
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement	(131)	(148)
PacifiCorp [Member] \| Commodity derivative [Member] \| Recurring [Member] \| Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative asset, fair value, gross asset including not subject to master netting arrangement	0	0
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement	0	0
PacifiCorp [Member] \| Money market mutual funds [Member] \| Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI	468	69
PacifiCorp [Member] \| Money market mutual funds [Member] \| Recurring [Member] \| Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI	468	69
PacifiCorp [Member] \| Money market mutual funds [Member] \| Recurring [Member] \| Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI	0	0
PacifiCorp [Member] \| Money market mutual funds [Member] \| Recurring [Member] \| Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI	0	0
PacifiCorp [Member] \| Investment funds [Member] \| Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI	24	24
PacifiCorp [Member] \| Investment funds [Member] \| Recurring [Member] \| Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI	24	24
PacifiCorp [Member] \| Investment funds [Member] \| Recurring [Member] \| Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI	0	0
PacifiCorp [Member] \| Investment funds [Member] \| Recurring [Member] \| Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI	$ 0	$ 0

XML 160 R124.htm IDEA: XBRL DOCUMENT

Fair Value Measurements - PacifiCorp - Debt (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, carrying value	$ 37,916	$ 36,250
Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, fair value	42,154	38,874
PacifiCorp [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, carrying value	7,656	7,015
PacifiCorp [Member] \| Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, fair value	$ 8,763	$ 7,833

XML 161 R125.htm IDEA: XBRL DOCUMENT

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

Mar. 31, 2019

Dec. 31, 2018

Cash collateral, net receivable, offset against derivative positions

$ 56

$ 59

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

(40)

(52)

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

3,927

3,114

111

Money market mutual funds [Member]

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

United States government obligations [Member]

1,169

409

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

International government obligations [Member]

190

187

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

Corporate obligations [Member]

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

Municipal obligations [Member]

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

US Government-sponsored Enterprises Debt Securities [Member]

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

United States companies [Member]

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

International companies [Member]

292

256

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

Investment funds [Member]

1,363

1,441

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

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

182

128

Level 1 [Member]

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

3,196

2,423

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

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

1,169

409

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

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

190

187

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

Level 1 [Member] | Corporate obligations [Member]

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

Level 1 [Member] | Municipal obligations [Member]

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

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

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

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

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

Level 1 [Member] | International companies [Member]

292

256

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

Level 1 [Member] | Investment funds [Member]

1,363

1,441

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

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

182

128

Level 2 [Member]

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

652

625

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

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

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

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

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

Level 2 [Member] | Corporate obligations [Member]

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

Level 2 [Member] | Municipal obligations [Member]

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

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

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

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

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

Level 2 [Member] | International companies [Member]

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

Level 2 [Member] | Investment funds [Member]

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

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

Level 3 [Member]

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

119

118

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

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

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

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

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

Level 3 [Member] | Corporate obligations [Member]

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

Level 3 [Member] | Municipal obligations [Member]

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

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

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

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

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

Level 3 [Member] | International companies [Member]

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

Level 3 [Member] | Investment funds [Member]

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

Commodity derivative [Member]

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

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

(40)

(52)

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

111

Commodity derivative [Member] | Level 1 [Member]

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

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

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

(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

(162)

(180)

Commodity derivative [Member] | Level 3 [Member]

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

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

100

108

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

(14)

(9)

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

Cash collateral, net receivable, offset against derivative positions

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

973

517

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

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

^[1]

410

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

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

190

187

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

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

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

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

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

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

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

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

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

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

292

256

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

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

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

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

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

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

918

461

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

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

^[1]

410

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

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

190

187

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

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

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

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

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

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

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

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

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

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

292

256

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

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

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

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

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

MidAmerican Energy Company [Member] | Level 2 [Member] | Money market mutual funds [Member]

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

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

^[1]

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

MidAmerican Energy Company [Member] | Level 3 [Member] | Money market mutual funds [Member]

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

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

^[1]

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

MidAmerican Energy Company [Member] | Commodity derivative [Member]

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

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

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

^[2]

(3)

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

(3)

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

^[2]

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

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

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

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

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

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

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

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

(3)

(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)

$ (2)

[1]	Amounts are included in cash and cash equivalents and investments and restricted cash and investments on the Balance Sheets. The fair value of these money market mutual funds approximates cost.
[2]	Represents netting under master netting arrangements and a net cash collateral receivable of $1 million and $- million as of March 31, 2019 and December 31, 2018, respectively.

XML 162 R126.htm IDEA: XBRL DOCUMENT

Fair Value Measurements - MEC - Debt (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, carrying value	$ 37,916	$ 36,250
Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, fair value	42,154	38,874
MidAmerican Energy Company [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, carrying value	6,341	5,379
Long-term debt, fair value		$ 5,644
MidAmerican Energy Company [Member] \| Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, fair value	$ 6,929

XML 163 R127.htm IDEA: XBRL DOCUMENT

Fair Value Measurements - MidAmerican Funding - Debt (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, carrying value	$ 37,916	$ 36,250
Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, fair value	42,154	38,874
MidAmerican Funding, LLC and Subsidiaries [Domain]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, carrying value	6,581	5,619
Long-term debt, fair value		$ 5,941
MidAmerican Funding, LLC and Subsidiaries [Domain] \| Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, fair value	$ 7,236

XML 164 R128.htm IDEA: XBRL DOCUMENT

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

Mar. 31, 2019

Dec. 31, 2018

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

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

$ 3,927

$ 3,114

Level 1 [Member]

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

3,196

2,423

Level 2 [Member]

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

652

625

Level 3 [Member]

Money market mutual funds [Member]

119

118

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

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

1,169

409

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

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

1,169

409

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

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

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

Investment funds [Member]

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

Investment funds [Member] | Level 1 [Member]

182

128

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

Investment funds [Member] | Level 2 [Member]

182

128

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

Investment funds [Member] | Level 3 [Member]

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

Commodity derivative [Member] | Level 1 [Member]

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

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

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

(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

(162)

(180)

Commodity derivative [Member] | Level 3 [Member]

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

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

100

108

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

(14)

(9)

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

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

112

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

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

105

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

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

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

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

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

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

104

^[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]

104

^[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

(9)

(4)

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

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

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

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

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

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

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

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

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

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

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

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

$ (9)

$ (4)

[1]	Amounts are included in cash and cash equivalents on the Consolidated Balance Sheets. The fair value of these money market mutual funds approximates cost.

XML 165 R129.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, 2019	Mar. 31, 2018
Fair Value, Assets (Liabilities), Net, Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance	$ 3	$ (3)
Fair Value, Measurements with Unobservable Inputs Reconciliation, Recurring Basis, Gain (Loss) Included In Regulatory Assets and Liabilities, Net	9	5
Fair Value, Measurements With Unobservable Inputs Reconciliation, Recurring Basis, Assets and Liability, Net, Settlements	(1)	0
Ending balance	$ (5)	$ (8)

XML 166 R130.htm IDEA: XBRL DOCUMENT

Fair Value Measurements - NPC - Debt (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, carrying value	$ 37,916	$ 36,250
Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, fair value	42,154	38,874
Nevada Power Company [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, carrying value	2,348	2,353
Nevada Power Company [Member] \| Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, fair value	$ 2,722	$ 2,651

XML 167 R131.htm IDEA: XBRL DOCUMENT

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

Mar. 31, 2019

Dec. 31, 2018

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

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

$ 3,927

$ 3,114

Level 1 [Member]

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

3,196

2,423

Level 2 [Member]

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

652

625

Level 3 [Member]

Money market mutual funds [Member]

119

118

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

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

1,169

409

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

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

1,169

409

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

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

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

Investment funds [Member]

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

Investment funds [Member] | Level 1 [Member]

182

128

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

Investment funds [Member] | Level 2 [Member]

182

128

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

Investment funds [Member] | Level 3 [Member]

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

Commodity derivative [Member] | Level 1 [Member]

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

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

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

(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

(162)

(180)

Commodity derivative [Member] | Level 3 [Member]

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

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

100

108

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

(14)

(9)

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

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

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

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

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

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

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

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

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

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

^[1]

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

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

^[1]

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

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

^[1]

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

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

^[1]

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

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

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

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

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

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

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

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

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

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

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

(1)

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

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

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

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

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

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

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

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

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

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

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

$ 2

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

$ (1)

[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 168 R132.htm IDEA: XBRL DOCUMENT

Fair Value Measurements - SPPC - Debt (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, carrying value	$ 37,916	$ 36,250
Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, fair value	42,154	38,874
Sierra Pacific Power Company [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, carrying value	1,120	1,120
Sierra Pacific Power Company [Member] \| Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, fair value	$ 1,196	$ 1,167

XML 169 R133.htm IDEA: XBRL DOCUMENT

Commitments and Contingencies - Commitments (Details) - USD ($)
$ in Millions

3 Months Ended

Mar. 31, 2019

Dec. 31, 2018

ContractualObligationFiscalYearMaturityScheduleTable [Line Items]

Property, Plant and Equipment [Abstract]

^[1]

$ 692

Equity Method Investments

$ 2,411

2,440

68,948

68,087

ContractualObligationFiscalYearMaturityScheduleTable [Line Items]

PacifiCorp [Member] | Klamath Hydroelectric System [Member]

$ 20

ContractualObligationFiscalYearMaturityScheduleTable [Line Items]

Dam removal cost limit

200

PacifiCorp [Member] | Klamath Hydroelectric System [Member] | CALIFORNIA

ContractualObligationFiscalYearMaturityScheduleTable [Line Items]

Dam removal cost limit

Additional dam removal costs, California bond measure

250

Capital Addition Purchase Commitments [Member] | PacifiCorp [Member]

ContractualObligationFiscalYearMaturityScheduleTable [Line Items]

Purchase Obligation

486

Maintenance, service and other contracts [Member] | MidAmerican Energy Company [Member]

ContractualObligationFiscalYearMaturityScheduleTable [Line Items]

Purchase Obligation

$ 301

Counterparty Bankruptcy [Member] | Topaz [Member]

ContractualObligationFiscalYearMaturityScheduleTable [Line Items]

Entity Legal Form

Property, Plant and Equipment [Abstract]

Revenue, Performance Obligation, Description of Payment Terms

Counterparty Bankruptcy [Member] | Agua Caliente [Member]

$ 1,100

Non-Recourse Debt

$ 900

ContractualObligationFiscalYearMaturityScheduleTable [Line Items]

Equity Method Investment, Ownership Percentage

49.00%

Property, Plant and Equipment [Abstract]

Revenue, Performance Obligation, Description of Payment Terms

Equity Method Investments

$ 47

Non-Recourse Debt

$ 800

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

- Details

Name:	bhe_HydroelectricSystemNameAxis=bhe_KlamathHydroelectricSystemMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

XML 170 R134.htm IDEA: XBRL DOCUMENT

Commitments and Contingencies Commitments and Contingencies - PAC - Commitments (Details) $ in Millions	Mar. 31, 2019 USD ($)
Capital Addition Purchase Commitments [Member] \| PacifiCorp [Member]
ContractualObligationFiscalYearMaturityScheduleTable [Line Items]
Purchase Obligation	$ 486

XML 171 R135.htm IDEA: XBRL DOCUMENT

Commitments and Contingencies Commitments and Contingencies - PacifiCorp - Hydroelectric (Details) - PacifiCorp [Member] - Klamath Hydroelectric System [Member] $ in Millions	3 Months Ended
	Mar. 31, 2019 USD ($)
Hydroelectric [Line Items]
Dam removal cost limit	$ 200
CALIFORNIA
Hydroelectric [Line Items]
Additional dam removal costs, California bond measure	250
Dam removal cost limit	$ 16

XML 172 R136.htm IDEA: XBRL DOCUMENT

Commitments and Contingencies Commitments and Contingencies - MEC- Commitments (Details) - MidAmerican Energy Company [Member] $ in Millions	Mar. 31, 2019 USD ($)
Maintenance, service and other contracts [Member]
ContractualObligationFiscalYearMaturityScheduleTable [Line Items]
Purchase Obligation	$ 301
Easements [Member]
ContractualObligationFiscalYearMaturityScheduleTable [Line Items]
Operating Leases, Future Minimum Payments Due	$ 197

XML 173 R137.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, 2019 USD ($)
Loss Contingencies [Line Items]
Public Utilities, Approved Return on Equity Adder, Percentage	0.50%
Unfavorable Regulatory Action [Member]
Loss Contingencies [Line Items]
Accrued liability for estimated transmission billings refunds	$ 10
Prior to September 2016 [Member]
Loss Contingencies [Line Items]
Public Utilities, Approved Return on Equity, Percentage	12.38%
November 2013 to February 2015 [Member]
Loss Contingencies [Line Items]
Public Utilities, Approved Return on Equity, Percentage	10.32%
Public Utilities, Intervenor Proposed Return On Equity, Percentage	9.15%
February 2015 through May 2016 [Member]
Loss Contingencies [Line Items]
Public Utilities, Intervenor Proposed Return On Equity, Percentage	8.67%

XML 174 R138.htm IDEA: XBRL DOCUMENT

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

3 Months Ended

Mar. 31, 2019

Mar. 31, 2018

Revenue from Contract with Customer, Excluding Assessed Tax

$ 3,687

$ 3,524

Non-contracts with customer revenue [Member]

4,610

4,440

Electricity and natural gas [Member]

138

155

3,825

3,679

Revenue from Contract with Customer, Excluding Assessed Tax

1,239

1,140

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

1,259

1,184

MidAmerican Funding [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

835

741

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

842

747

NV Energy, Inc. [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

607

610

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

614

617

Northern Powergrid Holdings [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

238

260

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

263

278

BHE Pipeline Group [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

372

374

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

371

376

BHE Transmission [Member]

(1)

^[1]

Revenue from Contract with Customer, Excluding Assessed Tax

168

180

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

168

180

BHE Renewables [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

126

117

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

167

154

Berkshire Hathaway Energy And Other [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

102

^[2]

102

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

141

^[2]

143

Regulated Operation [Member]

^[2]

Revenue from Contract with Customer, Excluding Assessed Tax

3,407

3,252

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

Revenue from Contract with Customer, Excluding Assessed Tax

2,156

2,021

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

Revenue from Contract with Customer, Excluding Assessed Tax

297

286

Regulated Operation [Member] | Regulated wholesale [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

156

125

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

Revenue from Contract with Customer, Excluding Assessed Tax

462

487

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

Revenue from Contract with Customer, Excluding Assessed Tax

335

333

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

Revenue from Contract with Customer, Excluding Assessed Tax

Regulated Operation [Member] | PacifiCorp [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

1,239

1,140

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

Revenue from Contract with Customer, Excluding Assessed Tax

1,186

1,096

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

Revenue from Contract with Customer, Excluding Assessed Tax

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

Revenue from Contract with Customer, Excluding Assessed Tax

^[3]

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

Revenue from Contract with Customer, Excluding Assessed Tax

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

Revenue from Contract with Customer, Excluding Assessed Tax

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

Revenue from Contract with Customer, Excluding Assessed Tax

Regulated Operation [Member] | MidAmerican Funding [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

829

741

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

Revenue from Contract with Customer, Excluding Assessed Tax

443

386

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

Revenue from Contract with Customer, Excluding Assessed Tax

260

246

Regulated Operation [Member] | MidAmerican Funding [Member] | Regulated wholesale [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

110

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

Revenue from Contract with Customer, Excluding Assessed Tax

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

Revenue from Contract with Customer, Excluding Assessed Tax

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

Revenue from Contract with Customer, Excluding Assessed Tax

Regulated Operation [Member] | NV Energy, Inc. [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

607

610

Regulated Operation [Member] | NV Energy, Inc. [Member] | Regulated retail electric [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

527

539

Regulated Operation [Member] | NV Energy, Inc. [Member] | Regulated retail gas [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

Regulated Operation [Member] | NV Energy, Inc. [Member] | Regulated wholesale [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

Regulated Operation [Member] | NV Energy, Inc. [Member] | Regulated transmission and distribution [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

Regulated Operation [Member] | NV Energy, Inc. [Member] | Regulated interstate pipeline [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

Regulated Operation [Member] | NV Energy, Inc. [Member] | Other customer revenue [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

Regulated Operation [Member] | Northern Powergrid Holdings [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

230

249

Regulated Operation [Member] | Northern Powergrid Holdings [Member] | Regulated retail electric [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

Regulated Operation [Member] | Northern Powergrid Holdings [Member] | Regulated retail gas [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

Regulated Operation [Member] | Northern Powergrid Holdings [Member] | Regulated wholesale [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

Regulated Operation [Member] | Northern Powergrid Holdings [Member] | Regulated transmission and distribution [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

230

249

Regulated Operation [Member] | Northern Powergrid Holdings [Member] | Regulated interstate pipeline [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

Regulated Operation [Member] | Northern Powergrid Holdings [Member] | Other customer revenue [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

Regulated Operation [Member] | BHE Pipeline Group [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

372

374

Regulated Operation [Member] | BHE Pipeline Group [Member] | Regulated retail electric [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

Regulated Operation [Member] | BHE Pipeline Group [Member] | Regulated retail gas [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

Regulated Operation [Member] | BHE Pipeline Group [Member] | Regulated wholesale [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

Regulated Operation [Member] | BHE Pipeline Group [Member] | Regulated transmission and distribution [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

Regulated Operation [Member] | BHE Pipeline Group [Member] | Regulated interstate pipeline [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

372

374

Regulated Operation [Member] | BHE Pipeline Group [Member] | Other customer revenue [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

Regulated Operation [Member] | BHE Transmission [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

167

180

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

Revenue from Contract with Customer, Excluding Assessed Tax

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

Revenue from Contract with Customer, Excluding Assessed Tax

Regulated Operation [Member] | BHE Transmission [Member] | Regulated wholesale [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

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

Revenue from Contract with Customer, Excluding Assessed Tax

167

180

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

Revenue from Contract with Customer, Excluding Assessed Tax

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

Revenue from Contract with Customer, Excluding Assessed Tax

Regulated Operation [Member] | BHE Renewables [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

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

Revenue from Contract with Customer, Excluding Assessed Tax

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

Revenue from Contract with Customer, Excluding Assessed Tax

Regulated Operation [Member] | BHE Renewables [Member] | Regulated wholesale [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

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

Revenue from Contract with Customer, Excluding Assessed Tax

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

Revenue from Contract with Customer, Excluding Assessed Tax

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

Revenue from Contract with Customer, Excluding Assessed Tax

Regulated Operation [Member] | Berkshire Hathaway Energy And Other [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

(37)

^[2]

(42)

Regulated Operation [Member] | Berkshire Hathaway Energy And Other [Member] | Regulated retail electric [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

^[2]

Regulated Operation [Member] | Berkshire Hathaway Energy And Other [Member] | Regulated retail gas [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

^[2]

Regulated Operation [Member] | Berkshire Hathaway Energy And Other [Member] | Regulated wholesale [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

^[2]

(1)

Regulated Operation [Member] | Berkshire Hathaway Energy And Other [Member] | Regulated transmission and distribution [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

^[2]

Regulated Operation [Member] | Berkshire Hathaway Energy And Other [Member] | Regulated interstate pipeline [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

(37)

^[2]

(41)

Regulated Operation [Member] | Berkshire Hathaway Energy And Other [Member] | Other customer revenue [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

^[2]

Unregulated Operation [Member] | Nonregulated products and services [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

280

272

Unregulated Operation [Member] | PacifiCorp [Member] | Nonregulated products and services [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

Unregulated Operation [Member] | MidAmerican Funding [Member] | Nonregulated products and services [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

Unregulated Operation [Member] | NV Energy, Inc. [Member] | Nonregulated products and services [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

Unregulated Operation [Member] | Northern Powergrid Holdings [Member] | Nonregulated products and services [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

Unregulated Operation [Member] | BHE Pipeline Group [Member] | Nonregulated products and services [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

Unregulated Operation [Member] | BHE Transmission [Member] | Nonregulated products and services [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

Unregulated Operation [Member] | BHE Renewables [Member] | Nonregulated products and services [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

126

117

Unregulated Operation [Member] | Berkshire Hathaway Energy And Other [Member] | Nonregulated products and services [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

139

^[2]

144

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

1,259

1,184

PacifiCorp [Member] | Regulated Operation [Member]

Revenue from Contract with Customer, Excluding Assessed Tax

1,239

1,140

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

Revenue from Contract with Customer, Excluding Assessed Tax

1,170

1,077

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

Revenue from Contract with Customer, Excluding Assessed Tax

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

Revenue from Contract with Customer, Excluding Assessed Tax

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

Revenue from Contract with Customer, Excluding Assessed Tax

$ 16

$ 19

[1]	ncludes net payments to counterparties for the financial settlement of certain derivative contracts at BHE Pipeline Group.
[2]	(1)The BHE and Other reportable segment represents amounts related principally to other entities, corporate functions and intersegment eliminations.
[3]	(2)I

XML 175 R139.htm IDEA: XBRL DOCUMENT

Revenue from Contracts with Customers Revenue from Contracts with Customers - Real Estate Services (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 3,687	$ 3,524
Operating revenue	4,610	4,440
Residential real estate brokerage and mortgage businesses [Member]
Disaggregation of Revenue [Line Items]
Operating revenue	785	761
Non-contracts with customer revenue [Member]
Disaggregation of Revenue [Line Items]
Operating revenue	138	155
HomeServices [Member]
Disaggregation of Revenue [Line Items]
Operating revenue	785	761
HomeServices [Member] \| Residential real estate brokerage [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	711	685
HomeServices [Member] \| Residential real estate brokerage and mortgage businesses [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	725	700
Operating revenue	785	761
HomeServices [Member] \| Real estate franchise [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	14	15
HomeServices [Member] \| Non-contracts with customer revenue [Member]
Disaggregation of Revenue [Line Items]
Operating revenue	$ 60	$ 61

XML 176 R140.htm IDEA: XBRL DOCUMENT

Revenue from Contracts with Customers Revenue from Contracts with Customers - Remaining Performance Obligation (Details) - BHE Pipeline Group [Member] $ in Millions	Mar. 31, 2019 USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-04-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	$ 918
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-04-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	5,796
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: (nil)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	$ 6,714

XML 177 R141.htm IDEA: XBRL DOCUMENT

Revenue from Contracts with Customers Revenue from Contracts with Customers - PAC - Customer Revenue (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 3,687	$ 3,524
Operating revenue	4,610	4,440
Non-contracts with customer revenue [Member]
Disaggregation of Revenue [Line Items]
Operating revenue	138	155
Regulated Operation [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	3,407	3,252
Regulated Operation [Member] \| Regulated retail electric [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	2,156	2,021
Regulated Operation [Member] \| Regulated wholesale [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	156	125
Regulated Operation [Member] \| Regulated transmission and distribution [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	462	487
Regulated Operation [Member] \| Other customer revenue [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	1	0
PacifiCorp [Member]
Disaggregation of Revenue [Line Items]
Operating revenue	1,259	1,184
PacifiCorp [Member] \| Non-contracts with customer revenue [Member]
Disaggregation of Revenue [Line Items]
Operating revenue	20	44
PacifiCorp [Member] \| Regulated Operation [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	1,239	1,140
PacifiCorp [Member] \| Regulated Operation [Member] \| Regulated retail electric [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	1,170	1,077
PacifiCorp [Member] \| Regulated Operation [Member] \| Regulated retail electric [Member] \| Residential [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	489	441
PacifiCorp [Member] \| Regulated Operation [Member] \| Regulated retail electric [Member] \| Commercial [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	360	342
PacifiCorp [Member] \| Regulated Operation [Member] \| Regulated retail electric [Member] \| Industrial [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	292	269
PacifiCorp [Member] \| Regulated Operation [Member] \| Regulated retail electric [Member] \| Other [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	29	25
PacifiCorp [Member] \| Regulated Operation [Member] \| Regulated wholesale [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	28	22
PacifiCorp [Member] \| Regulated Operation [Member] \| Regulated transmission and distribution [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	25	22
PacifiCorp [Member] \| Regulated Operation [Member] \| Other customer revenue [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 16	$ 19

XML 178 R142.htm IDEA: XBRL DOCUMENT

Revenue from Contracts with Customers Revenue from Contracts with Customers - MEC (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 3,687	$ 3,524
Operating revenue	4,610	4,440
Non-contracts with customer revenue [Member]
Disaggregation of Revenue [Line Items]
Operating revenue	138	155
Regulated Operation [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	3,407	3,252
Regulated Operation [Member] \| Regulated retail electric [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	2,156	2,021
Regulated Operation [Member] \| Regulated retail gas [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	297	286
Regulated Operation [Member] \| Regulated wholesale [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	156	125
Regulated Operation [Member] \| Other customer revenue [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	1	0
MidAmerican Energy Company [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	835	740
Operating revenue	842	746
MidAmerican Energy Company [Member] \| Non-contracts with customer revenue [Member]
Disaggregation of Revenue [Line Items]
Operating revenue	7	6
MidAmerican Energy Company [Member] \| Regulated electric
Disaggregation of Revenue [Line Items]
Operating revenue	542	469
MidAmerican Energy Company [Member] \| Regulated natural gas
Disaggregation of Revenue [Line Items]
Operating revenue	295	275
MidAmerican Energy Company [Member] \| Corporate and Other [Member]
Disaggregation of Revenue [Line Items]
Operating revenue	5	2
MidAmerican Energy Company [Member] \| Regulated Operation [Member] \| Regulated retail [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	704	629
MidAmerican Energy Company [Member] \| Regulated Operation [Member] \| Regulated retail [Member] \| Residential [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	346	329
MidAmerican Energy Company [Member] \| Regulated Operation [Member] \| Regulated retail [Member] \| Commercial [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	141	133
MidAmerican Energy Company [Member] \| Regulated Operation [Member] \| Regulated retail [Member] \| Industrial [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	169	150
MidAmerican Energy Company [Member] \| Regulated Operation [Member] \| Regulated retail [Member] \| Natural gas distribution, transportation-only services [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	12	13
MidAmerican Energy Company [Member] \| Regulated Operation [Member] \| Regulated retail [Member] \| Other [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	36	4
MidAmerican Energy Company [Member] \| Regulated Operation [Member] \| Regulated wholesale [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	110	94
MidAmerican Energy Company [Member] \| Regulated Operation [Member] \| Electricity Transmission [Member] \| Multi value transmission projects [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	16	15
MidAmerican Energy Company [Member] \| Regulated Operation [Member] \| Regulated electric
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	536	464
Operating revenue	542	469
MidAmerican Energy Company [Member] \| Regulated Operation [Member] \| Regulated electric \| Regulated retail electric [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	444	387
MidAmerican Energy Company [Member] \| Regulated Operation [Member] \| Regulated electric \| Regulated retail electric [Member] \| Residential [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	171	161
MidAmerican Energy Company [Member] \| Regulated Operation [Member] \| Regulated electric \| Regulated retail electric [Member] \| Commercial [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	75	71
MidAmerican Energy Company [Member] \| Regulated Operation [Member] \| Regulated electric \| Regulated retail electric [Member] \| Industrial [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	163	145
MidAmerican Energy Company [Member] \| Regulated Operation [Member] \| Regulated electric \| Regulated retail electric [Member] \| Other [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	35	10
MidAmerican Energy Company [Member] \| Regulated Operation [Member] \| Regulated electric \| Regulated wholesale [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	76	62
MidAmerican Energy Company [Member] \| Regulated Operation [Member] \| Regulated electric \| Electricity Transmission [Member] \| Multi value transmission projects [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	16	15
MidAmerican Energy Company [Member] \| Regulated Operation [Member] \| Regulated electric \| Non-contracts with customer revenue [Member]
Disaggregation of Revenue [Line Items]
Operating revenue	6	5
MidAmerican Energy Company [Member] \| Regulated Operation [Member] \| Regulated natural gas
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	294	274
Operating revenue	295	275
MidAmerican Energy Company [Member] \| Regulated Operation [Member] \| Regulated natural gas \| Regulated retail gas [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	260	242
MidAmerican Energy Company [Member] \| Regulated Operation [Member] \| Regulated natural gas \| Regulated retail gas [Member] \| Residential [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	175	168
MidAmerican Energy Company [Member] \| Regulated Operation [Member] \| Regulated natural gas \| Regulated retail gas [Member] \| Commercial [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	66	62
MidAmerican Energy Company [Member] \| Regulated Operation [Member] \| Regulated natural gas \| Regulated retail gas [Member] \| Industrial [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	6	5
MidAmerican Energy Company [Member] \| Regulated Operation [Member] \| Regulated natural gas \| Regulated retail gas [Member] \| Natural gas distribution, transportation-only services [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	12	13
MidAmerican Energy Company [Member] \| Regulated Operation [Member] \| Regulated natural gas \| Regulated retail gas [Member] \| Other [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	1	(6)
MidAmerican Energy Company [Member] \| Regulated Operation [Member] \| Regulated natural gas \| Regulated wholesale [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	34	32
MidAmerican Energy Company [Member] \| Regulated Operation [Member] \| Regulated natural gas \| Non-contracts with customer revenue [Member]
Disaggregation of Revenue [Line Items]
Operating revenue	1	1
MidAmerican Energy Company [Member] \| Unregulated Operation [Member] \| Other customer revenue [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	5	2
MidAmerican Energy Company [Member] \| Unregulated Operation [Member] \| Corporate and Other [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	5	2
Operating revenue	5	2
MidAmerican Energy Company [Member] \| Unregulated Operation [Member] \| Corporate and Other [Member] \| Other customer revenue [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	5	$ 2
MidAmerican Energy Company [Member] \| Unregulated Operation [Member] \| Corporate and Other [Member] \| Non-contracts with customer revenue [Member]
Disaggregation of Revenue [Line Items]
Operating revenue	$ 0

XML 179 R143.htm IDEA: XBRL DOCUMENT

Revenue from Contracts with Customers Revenue from Contracts with Customers - LLC - Customer Revenue (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 3,687	$ 3,524
Unregulated Operation [Member] \| Nonregulated products and services [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	280	272
Corporate and Other [Member] \| MidAmerican Funding, LLC and Subsidiaries [Domain] \| Unregulated Operation [Member] \| Nonregulated products and services [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 0	$ 1

XML 180 R144.htm IDEA: XBRL DOCUMENT

Revenue from Contracts with Customers Revenue from Contracts with Customers - NPC - Customer Revenue (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 3,687	$ 3,524
Operating revenue	4,610	4,440
Non-contracts with customer revenue [Member]
Disaggregation of Revenue [Line Items]
Operating revenue	138	155
Regulated Operation [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	3,407	3,252
Regulated Operation [Member] \| Regulated retail electric [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	2,156	2,021
Nevada Power Company [Member]
Disaggregation of Revenue [Line Items]
Operating revenue	395	395
Nevada Power Company [Member] \| Non-contracts with customer revenue [Member]
Disaggregation of Revenue [Line Items]
Operating revenue	6	5
Nevada Power Company [Member] \| Regulated Operation [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	389	390
Nevada Power Company [Member] \| Regulated Operation [Member] \| Regulated retail electric [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	372	380
Nevada Power Company [Member] \| Regulated Operation [Member] \| Regulated wholesale, transmission and other [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	17	10
Nevada Power Company [Member] \| Fully bundled customer [Member] \| Regulated Operation [Member] \| Regulated retail electric [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	365	373
Nevada Power Company [Member] \| Fully bundled customer [Member] \| Regulated Operation [Member] \| Regulated retail electric [Member] \| Residential [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	200	193
Nevada Power Company [Member] \| Fully bundled customer [Member] \| Regulated Operation [Member] \| Regulated retail electric [Member] \| Commercial [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	90	95
Nevada Power Company [Member] \| Fully bundled customer [Member] \| Regulated Operation [Member] \| Regulated retail electric [Member] \| Industrial [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	70	79
Nevada Power Company [Member] \| Fully bundled customer [Member] \| Regulated Operation [Member] \| Regulated retail electric [Member] \| Other [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	5	6
Nevada Power Company [Member] \| Distribution only service [Member] \| Regulated Operation [Member] \| Regulated retail electric [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 7	$ 7

XML 181 R145.htm IDEA: XBRL DOCUMENT

Revenue from Contracts with Customers Revenue from Contracts with Customers - SPPC - Customer Revenue (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 3,687	$ 3,524
Operating revenue	4,610	4,440
Non-contracts with customer revenue [Member]
Disaggregation of Revenue [Line Items]
Operating revenue	138	155
Regulated Operation [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	3,407	3,252
Regulated Operation [Member] \| Regulated retail electric [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	2,156	2,021
Sierra Pacific Power Company [Member]
Disaggregation of Revenue [Line Items]
Operating revenue	219	222
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
Disaggregation of Revenue [Line Items]
Operating revenue	182	181
Sierra Pacific Power Company [Member] \| Regulated electric \| Non-contracts with customer revenue [Member]
Disaggregation of Revenue [Line Items]
Operating revenue	1	1
Sierra Pacific Power Company [Member] \| Regulated natural gas
Disaggregation of Revenue [Line Items]
Operating revenue	37	41
Sierra Pacific Power Company [Member] \| Regulated natural gas \| Non-contracts with customer revenue [Member]
Disaggregation of Revenue [Line Items]
Operating revenue	0	1
Sierra Pacific Power Company [Member] \| Regulated Operation [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	218	220
Sierra Pacific Power Company [Member] \| Regulated Operation [Member] \| Regulated wholesale, transmission and other [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	17	13
Sierra Pacific Power Company [Member] \| Regulated Operation [Member] \| Regulated electric
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	181	180
Sierra Pacific Power Company [Member] \| Regulated Operation [Member] \| Regulated electric \| Regulated wholesale, transmission and other [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	17	13
Sierra Pacific Power Company [Member] \| Regulated Operation [Member] \| Regulated natural gas
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	37	40
Sierra Pacific Power Company [Member] \| Regulated Operation [Member] \| Regulated natural gas \| Regulated wholesale, transmission and other [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0	0
Sierra Pacific Power Company [Member] \| Regulated Operation [Member] \| Fully bundled customer [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	200	206
Sierra Pacific Power Company [Member] \| Regulated Operation [Member] \| Fully bundled customer [Member] \| Residential [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	92	94
Sierra Pacific Power Company [Member] \| Regulated Operation [Member] \| Fully bundled customer [Member] \| Commercial [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	64	68
Sierra Pacific Power Company [Member] \| Regulated Operation [Member] \| Fully bundled customer [Member] \| Industrial [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	42	42
Sierra Pacific Power Company [Member] \| Regulated Operation [Member] \| Fully bundled customer [Member] \| Other [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	2	2
Sierra Pacific Power Company [Member] \| Regulated Operation [Member] \| Fully bundled customer [Member] \| Regulated electric \| Regulated retail electric [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	163	166
Sierra Pacific Power Company [Member] \| Regulated Operation [Member] \| Fully bundled customer [Member] \| Regulated electric \| Regulated retail electric [Member] \| Residential [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	68	68
Sierra Pacific Power Company [Member] \| Regulated Operation [Member] \| Fully bundled customer [Member] \| Regulated electric \| Regulated retail electric [Member] \| Commercial [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	54	57
Sierra Pacific Power Company [Member] \| Regulated Operation [Member] \| Fully bundled customer [Member] \| Regulated electric \| Regulated retail electric [Member] \| Industrial [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	39	39
Sierra Pacific Power Company [Member] \| Regulated Operation [Member] \| Fully bundled customer [Member] \| Regulated electric \| Regulated retail electric [Member] \| Other [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	2	2
Sierra Pacific Power Company [Member] \| Regulated Operation [Member] \| Fully bundled customer [Member] \| Regulated natural gas
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	37	40
Sierra Pacific Power Company [Member] \| Regulated Operation [Member] \| Fully bundled customer [Member] \| Regulated natural gas \| Residential [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	24	26
Sierra Pacific Power Company [Member] \| Regulated Operation [Member] \| Fully bundled customer [Member] \| Regulated natural gas \| Commercial [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	10	11
Sierra Pacific Power Company [Member] \| Regulated Operation [Member] \| Fully bundled customer [Member] \| Regulated natural gas \| Industrial [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	3	3
Sierra Pacific Power Company [Member] \| Regulated Operation [Member] \| Fully bundled customer [Member] \| Regulated natural gas \| Other [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0	0
Sierra Pacific Power Company [Member] \| Regulated Operation [Member] \| Distribution only service [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	1	1
Sierra Pacific Power Company [Member] \| Regulated Operation [Member] \| Distribution only service [Member] \| Regulated electric \| Regulated retail electric [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	1	1
Sierra Pacific Power Company [Member] \| Regulated Operation [Member] \| Distribution only service [Member] \| Regulated natural gas
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0	0
Sierra Pacific Power Company [Member] \| Regulated Operation [Member] \| Fully bundled and distribution services only customer [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	201	207
Sierra Pacific Power Company [Member] \| Regulated Operation [Member] \| Fully bundled and distribution services only customer [Member] \| Regulated electric \| Regulated retail electric [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	164	167
Sierra Pacific Power Company [Member] \| Regulated Operation [Member] \| Fully bundled and distribution services only customer [Member] \| Regulated natural gas
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 37	$ 40

XML 182 R146.htm IDEA: XBRL DOCUMENT

Components of Accumulated Other Comprehensive Loss, Net (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance - Accumulated other comprehensive loss, net	$ (1,945)
Other comprehensive income (loss), unrecognized amounts on retirement benefits	(32)	$ (3)
Other comprehensive income (loss), foreign currency translation adjustment	155	73
Other comprehensive income (loss), unrealized gains (losses) on cash flow hedges	(8)	(2)
Other comprehensive income (loss)	115	68
Ending balance - Accumulated other comprehensive loss, net	(1,830)
Accumulated Other Comprehensive (Loss) Income, Net [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification		(1,085)
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance - unrecognized amounts on retirement benefits	(358)	(383)
Beginning balance - foreign currency translation adjustment	(1,623)	(1,129)
Beginning balance - unrealized gains (losses) on available-for-sale securities	0	1,085
Beginning balance - unrealized gains (losses) on cash flow hedges	36	29
Beginning balance - Accumulated other comprehensive loss, net	(1,945)	(398)
Other comprehensive income (loss), unrecognized amounts on retirement benefits	(32)	(3)
Other comprehensive income (loss), foreign currency translation adjustment	155	73
Unrealized gains on marketable securities, net of tax	0	0
Other comprehensive income (loss), unrealized gains (losses) on cash flow hedges	(8)	(2)
Other comprehensive income (loss)	115	68
Ending balance - unrecognized amounts on retirement benefits	(390)	(386)
Ending balance - foreign currency translation adjustment	(1,468)	(1,056)
Ending balance - unrealized gains (losses) on available-for-sale securities	0	0
Ending balance - unrealized gains (losses) on cash flow hedges	28	27
Ending balance - Accumulated other comprehensive loss, net	$ (1,830)	$ (1,415)

XML 183 R147.htm IDEA: XBRL DOCUMENT

Components of Accumulated Other Comprehensive Loss, Net - MEC (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance - Accumulated other comprehensive loss, net	$ (1,945)
Other comprehensive income (loss), unrealized gains (losses) on cash flow hedges	(8)	$ (2)
Other comprehensive income (loss)	115	68
Ending balance - Accumulated other comprehensive loss, net	(1,830)
Accumulated Other Comprehensive (Loss) Income, Net [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance - unrealized gains (losses) on available-for-sale securities	0	1,085
Beginning balance - unrealized gains (losses) on cash flow hedges	36	29
Beginning balance - Accumulated other comprehensive loss, net	(1,945)	(398)
Other comprehensive income (loss), unrealized gains on available-for-sale securities	0	0
Other comprehensive income (loss), unrealized gains (losses) on cash flow hedges	(8)	(2)
Other comprehensive income (loss)	115	68
Ending balance - unrealized gains (losses) on available-for-sale securities	0	0
Ending balance - unrealized gains (losses) on cash flow hedges	28	27
Ending balance - Accumulated other comprehensive loss, net	$ (1,830)	$ (1,415)

XML 184 R148.htm IDEA: XBRL DOCUMENT

Segment Information (Details) - USD ($)
$ in Millions

3 Months Ended

Mar. 31, 2019

Mar. 31, 2018

Dec. 31, 2018

$ 4,610

$ 4,440

Depreciation and amortization

(720)

(704)

733

716

919

871

477

466

Capitalized interest

Interest and dividend income

Losses on marketable securities, net

(68)

(209)

487

285

94,545

$ 92,189

1,259

1,184

(205)

(202)

284

247

MidAmerican Funding [Member]

24,211

23,478

842

747

(177)

(158)

116

20,845

20,029

NV Energy, Inc. [Member]

614

617

(120)

(113)

Northern Powergrid Holdings [Member]

14,105

14,119

263

278

(63)

129

147

BHE Pipeline Group [Member]

7,626

7,427

371

376

(28)

(42)

243

226

BHE Transmission [Member]

5,579

5,511

168

180

(58)

(62)

8,567

8,424

BHE Renewables [Member]

167

154

(70)

(64)

8,654

8,666

HomeServices [Member]

Depreciation and amortization

785

761

(21)

(8)

Berkshire Hathaway Energy And Other [Member]

3,427

2,797

141

^[1]

143

(1)

(10)

(18)

108

103

1,531

$ 1,738

UNITED STATES

4,177

3,978

336

118

UNITED KINGDOM

263

277

103

112

CANADA

168

180

The Philippines and other [Member]

$ 8

$ 14

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

XML 185 R149.htm IDEA: XBRL DOCUMENT

Segment Information - Goodwill (Details) $ in Millions	3 Months Ended
Segment Information - Goodwill (Details) $ in Millions	Mar. 31, 2019 USD ($)
Goodwill [Roll Forward]
Beginning balance	$ 9,595
Acquisitions	23
Foreign currency translation	45
Ending balance	9,663
PacifiCorp [Member]
Goodwill [Roll Forward]
Beginning balance	1,129
Acquisitions	0
Foreign currency translation	0
Ending balance	1,129
MidAmerican Funding [Member]
Goodwill [Roll Forward]
Beginning balance	2,102
Acquisitions	0
Foreign currency translation	0
Ending balance	2,102
NV Energy, Inc. [Member]
Goodwill [Roll Forward]
Beginning balance	2,369
Acquisitions	0
Foreign currency translation	0
Ending balance	2,369
Northern Powergrid Holdings [Member]
Goodwill [Roll Forward]
Beginning balance	952
Acquisitions	0
Foreign currency translation	14
Ending balance	966
BHE Pipeline Group [Member]
Goodwill [Roll Forward]
Beginning balance	73
Acquisitions	0
Foreign currency translation	0
Ending balance	73
BHE Transmission [Member]
Goodwill [Roll Forward]
Beginning balance	1,448
Acquisitions	0
Foreign currency translation	31
Ending balance	1,479
BHE Renewables [Member]
Goodwill [Roll Forward]
Beginning balance	95
Acquisitions	0
Foreign currency translation	0
Ending balance	95
HomeServices [Member]
Goodwill [Roll Forward]
Beginning balance	1,427
Acquisitions	23
Foreign currency translation	0
Ending balance	$ 1,450

XML 186 R150.htm IDEA: XBRL DOCUMENT

Segment Information Segment Information - MEC (Details) $ in Millions	3 Months Ended
	Mar. 31, 2019 USD ($) OperatingSegments ReportableSegments	Mar. 31, 2018 USD ($)	Dec. 31, 2018 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments \| OperatingSegments	8
Operating revenue	$ 4,610	$ 4,440
Operating income	919	871
Interest expense	(477)	(466)
Capitalized interest	16	12
Allowance for equity funds	32	21
Other, net	35	30
Income before income tax (benefit) expense and equity income	487	285
Assets	$ 94,545		$ 92,189
MidAmerican Energy Company [Member]
Segment Reporting Information [Line Items]
Number of reportable segments \| ReportableSegments	2
Operating revenue	$ 842	746
Operating income	115	79
Interest expense	(69)	(58)
Capitalized interest	6	4
Allowance for equity funds	15	10
Other, net	20	9
Income before income tax (benefit) expense and equity income	87	44
Assets	18,732		17,920
MidAmerican Energy Company [Member] \| Regulated electric
Segment Reporting Information [Line Items]
Operating revenue	542	469
Operating income	66	36
Assets	17,373		16,511
MidAmerican Energy Company [Member] \| Regulated natural gas
Segment Reporting Information [Line Items]
Operating revenue	295	275
Operating income	48	43
Assets	1,357		1,406
MidAmerican Energy Company [Member] \| Corporate and Other [Member]
Segment Reporting Information [Line Items]
Operating revenue	5	2
Operating income	1	$ 0
Assets	$ 2		$ 3

XML 187 R151.htm IDEA: XBRL DOCUMENT

Segment Information Segment Information - MidAmerican Funding (Details)
$ in Millions

3 Months Ended

Mar. 31, 2019

USD ($)

OperatingSegments

ReportableSegments

Mar. 31, 2018

USD ($)

Dec. 31, 2018

USD ($)

Number of reportable segments | OperatingSegments

$ 4,610

$ 4,440

919

871

(477)

(466)

Capitalized interest

Income before income tax (benefit) expense and equity income

487

285

$ 94,545

$ 92,189

Number of reportable segments | ReportableSegments

$ 842

747

116

(75)

(63)

Capitalized interest

Income before income tax (benefit) expense and equity income

MidAmerican Funding, LLC and Subsidiaries [Domain] | Regulated electric

^[1]

20,017

19,202

542

469

MidAmerican Funding, LLC and Subsidiaries [Domain] | Regulated natural gas

^[1]

18,564

17,702

295

275

MidAmerican Funding, LLC and Subsidiaries [Domain] | Corporate and Other [Member]

^[1]

1,436

1,485

$ 0

^[1]

$ 17

$ 15

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

XML 188 R152.htm IDEA: XBRL DOCUMENT

Segment Information Segment Information - SPPC (Details)
$ in Millions

3 Months Ended

Mar. 31, 2019

USD ($)

OperatingSegments

TheNumberOfReportableSegments

Mar. 31, 2018

USD ($)

Dec. 31, 2018

USD ($)

Number of reportable segments | OperatingSegments

$ 4,610

$ 4,440

919

871

477

466

487

285

$ 94,545

$ 92,189

Number of reportable segments | TheNumberOfReportableSegments

$ 219

222

Sierra Pacific Power Company [Member] | Regulated electric

3,617

3,569

Regulated Operating Revenue

182

181

182

181

Sierra Pacific Power Company [Member] | Regulated natural gas

3,227

3,177

Regulated Operating Revenue, Gas

$ 10

Sierra Pacific Power Company [Member] | Regulated common assets [Member]

316

314