Consolidated Statements of Operations - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Operating revenue:
Total operating revenue		$ 20,952	$ 19,844	$ 19,787
Energy:
Cost of fuel and energy		4,187	4,586	4,769
Operations and maintenance		3,545	3,318	3,440
Depreciation and amortization		3,410	2,965	2,933
Total operating expenses		16,661	15,694	15,715
Taxes, Miscellaneous		634	574	573
Real estate		4,885	4,251	4,000
Operating income		4,291	4,150	4,072
Other income (expense):
Interest expense		(2,021)	(1,912)	(1,838)
Capitalized interest and allowance for borrowed funds		80	77	61
Allowance for equity funds		165	173	104
Other Interest and Dividend Income		71	117	113
Gain (Loss) on Investments		4,797	(288)	(538)
Other, net		88	97	(9)
Total other income (expense)		3,180	(1,736)	(2,107)
Income before income tax expense (benefit) and equity (loss) income		7,471	2,414	1,965
Income tax expense (benefit)		308	(598)	(583)
Equity income (loss)		(149)	(44)	43
Net income		7,014	2,968	2,591
Net income attributable to noncontrolling interests		71	18	23
Net income (loss) attributable to parent		6,943	2,950	2,568
Dividends, Preferred Stock		26	0	0
Undistributed Earnings (Loss) Available to Common Shareholders, Diluted		6,917	2,950	2,568
Electricity and natural gas [Member]
Operating revenue:
Total operating revenue		15,556	15,371	15,573
Residential real estate brokerage and mortgage businesses [Member]
Operating revenue:
Total operating revenue		5,396	4,473	4,214
PacifiCorp [Member]
Operating revenue:
Total operating revenue		5,341	5,068	5,026
Energy:
Cost of fuel and energy		1,790	1,795	1,757
Operations and maintenance		1,209	1,048	1,038
Depreciation and amortization		1,209	954	979
Property and other taxes		209	199	201
Total operating costs and expenses		4,417	3,996	3,975
Operating income		924	1,072	1,051
Other income (expense):
Interest expense		(426)	(401)	(384)
Capitalized interest and allowance for borrowed funds		48	36	18
Allowance for equity funds		98	72	35
Interest and dividend income		10	21	15
Other, net		10	32	8
Total other income (expense)		(260)	(240)	(308)
Income before income tax expense (benefit) and equity (loss) income		664	832	743
Income tax expense (benefit)		(75)	61	5
Net income (loss) attributable to parent		739	771	738
MidAmerican Energy Company [Member]
Operating revenue:
Total operating revenue		2,720	2,925	3,049
Energy:
Operations and maintenance		754	800	811
Depreciation and amortization		716	639	609
Property and other taxes		135	126	125
Total operating expenses		2,272	2,377	2,498
Operating income		448	548	551
Other income (expense):
Interest expense		(304)	(281)	(227)
Capitalized interest and allowance for borrowed funds		15	27	20
Allowance for equity funds		45	78	53
Other, net		52	50	30
Total other income (expense)		(192)	(126)	(124)
Income before income tax expense (benefit) and equity (loss) income		256	422	427
Income tax expense (benefit)		(570)	(371)	(255)
Net income (loss) attributable to parent		826	793	682
MidAmerican Energy Company [Member] | Electricity, US Regulated [Member]
Operating revenue:
Total operating revenue		2,139	2,237	2,283
Energy:
Cost of fuel and energy		339	399	487
MidAmerican Energy Company [Member] | Regulated natural gas and other [Member]
Operating revenue:
Total operating revenue		581	688	766
Energy:
Cost of fuel and energy		328	413	466
MidAmerican Funding, LLC and Subsidiaries [Member]
Operating revenue:
Total operating revenue		2,728	2,927	3,053
Energy:
Operations and maintenance		755	801	813
Depreciation and amortization		716	639	609
Property and other taxes		135	127	125
Total operating expenses		2,274	2,378	2,503
Operating income		454	549	550
Other income (expense):
Interest expense		(322)	(302)	(247)
Capitalized interest and allowance for borrowed funds		15	27	20
Allowance for equity funds		45	78	53
Other, net		52	52	31
Total other income (expense)		(210)	(145)	(143)
Income before income tax expense (benefit) and equity (loss) income		244	404	407
Income tax expense (benefit)		(574)	(377)	(262)
Net income (loss) attributable to parent		818	781	669
MidAmerican Funding, LLC and Subsidiaries [Member] | Electricity, US Regulated [Member]
Operating revenue:
Total operating revenue		2,139	2,237	2,283
Energy:
Cost of fuel and energy		339	399	487
MidAmerican Funding, LLC and Subsidiaries [Member] | Regulated natural gas and other [Member]
Operating revenue:
Total operating revenue		589	690	770
Energy:
Cost of fuel and energy		329	412	469
Nevada Power Company [Member]
Operating revenue:
Total operating revenue		1,998	2,148	2,184
Energy:
Cost of fuel and energy		816	943	917
Operations and maintenance		299	324	443
Depreciation and amortization		361	357	337
Property and other taxes		47	45	41
Total operating expenses		1,523	1,669	1,738
Operating income		475	479	446
Other income (expense):
Interest expense		(162)	(171)	(170)
Capitalized interest and allowance for borrowed funds		3	3	2
Allowance for equity funds		7	5	3
Other, net		19	21	17
Total other income (expense)		(133)	(142)	(148)
Income before income tax expense (benefit) and equity (loss) income		342	337	298
Income tax expense (benefit)		47	73	72
Net income (loss) attributable to parent		295	264	226
Sierra Pacific Power Company [Member]
Operating revenue:
Total operating revenue		854	889	855
Energy:
Operations and maintenance		162	172	190
Depreciation and amortization		141	125	119
Property and other taxes		23	22	23
Total operating expenses		689	718	703
Operating income		165	171	152
Other income (expense):
Interest expense		(56)	(48)	(44)
Capitalized interest and allowance for borrowed funds		2	1	1
Allowance for equity funds		4	3	4
Other, net		11	4	9
Total other income (expense)		(39)	(40)	(30)
Income before income tax expense (benefit) and equity (loss) income		126	131	122
Income tax expense (benefit)		15	28	30
Net income (loss) attributable to parent		111	103	92
Sierra Pacific Power Company [Member] | Electricity, US Regulated [Member]
Operating revenue:
Total operating revenue		738	770	752
Energy:
Cost of fuel and energy		301	337	322
Sierra Pacific Power Company [Member] | Natural Gas, US Regulated [Member]
Operating revenue:
Total operating revenue		116	119	103
Energy:
Cost of fuel and energy		62	62	49
Eastern Energy Gas Holdings, LLC [Member]
Operating revenue:
Total operating revenue		2,090	2,169	1,996
Cost of fuel and energy		24	9	(6)
Energy:
Operations and maintenance		1,142	748	774
Depreciation and amortization		366	367	333
Property and other taxes		140	141	108
Total operating expenses		1,672	1,265	1,209
Operating income		418	904	787
Other income (expense):
Interest expense		(333)	(311)	(174)
Allowance for equity funds		13	18	15
Interest and dividend income		67	105	26
Other, net		42	43	48
Total other income (expense)		(211)	(145)	(85)
Income before income tax expense (benefit) and equity (loss) income		207	759	702
Income tax expense (benefit)		(24)	101	124
Equity income (loss)		42	43	54
Net income from continuing operations		273	701	632
Net income from discontinued operations	[1]	0	141	24
Net income		273	842	656
Net income attributable to noncontrolling interests		164	121	175
Net income (loss) attributable to parent		$ 109	$ 721	$ 481

[1] Includes income tax expense of $33 million and less than $1 million for the years ended December 31, 2019 and 2018, respectively.