Consolidated Statements of Operations - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Operating revenue:
Total operating revenue	$ 19,787	$ 18,614	$ 17,422
Energy:
Cost of Goods and Services Sold	4,769	4,518	4,315
Operations and maintenance	3,440	3,210	3,176
Depreciation and amortization	2,933	2,580	2,560
Taxes, Miscellaneous	573	555	535
Real estate	4,000	3,229	2,589
Total operating expenses	15,715	14,092	13,175
Operating income	4,072	4,522	4,247
Other income (expense):
Interest expense	(1,838)	(1,841)	(1,854)
Capitalized interest and allowance for borrowed funds	61	45	139
Allowance for equity funds	104	76	158
Other Interest and Dividend Income	113	111	120
Gain (Loss) on Investments	(538)	14	10
Other, net	(9)	(420)	30
Total other income (expense)	(2,107)	(2,015)	(1,397)
Income before income tax (benefit) expense and equity income (loss)	1,965	2,507	2,850
Income tax (benefit) expense	(583)	(554)	403
Equity income (loss)	43	(151)	123
Net income	2,591	2,910	2,570
Net income attributable to noncontrolling interests	23	40	28
Net income (loss) attributable to parent	2,568	2,870	2,542
Electricity and natural gas [Member]
Operating revenue:
Total operating revenue	15,573	15,171	14,621
Residential real estate brokerage and mortgage businesses [Member]
Operating revenue:
Total operating revenue	4,214	3,443	2,801
PacifiCorp [Member]
Operating revenue:
Total operating revenue	5,026	5,237	5,201
Energy:
Cost of Goods and Services Sold	1,757	1,770	1,751
Operations and maintenance	1,038	1,034	1,062
Utilities Operating Expense, Depreciation and Amortization	979	796	770
Taxes, other than income taxes	201	197	190
Total operating costs and expenses	3,975	3,797	3,773
Operating income	1,051	1,440	1,428
Other income (expense):
Interest expense	(384)	(381)	(380)
Capitalized interest and allowance for borrowed funds	18	11	15
Allowance for equity funds	35	20	27
Other, net	23	38	13
Total other income (expense)	(308)	(312)	(325)
Income before income tax (benefit) expense and equity income (loss)	743	1,128	1,103
Income tax (benefit) expense	5	360	340
Net income (loss) attributable to parent	738	768	763
MidAmerican Energy Company [Member]
Operating revenue:
Total operating revenue	3,049	2,837	2,625
Energy:
Operations and maintenance	811	799	708
Utilities Operating Expense, Depreciation and Amortization	609	500	479
Taxes, other than income taxes	125	119	112
Total operating expenses	2,498	2,294	2,075
Operating income	551	543	550
Other income (expense):
Interest expense	(227)	(214)	(196)
Capitalized interest and allowance for borrowed funds	20	15	8
Allowance for equity funds	53	41	19
Other, net	30	37	29
Total other income (expense)	(124)	(121)	(140)
Income before income tax (benefit) expense and equity income (loss)	427	422	410
Income tax (benefit) expense	(255)	(183)	(132)
Net income (loss) attributable to parent	682	605	542
MidAmerican Energy Company [Member] | Electricity, US Regulated [Member]
Operating revenue:
Total operating revenue	2,283	2,108	1,985
Energy:
Cost of Goods and Services Sold	487	434	409
MidAmerican Energy Company [Member] | Regulated natural gas and other [Member]
Operating revenue:
Total operating revenue	766	729	640
Energy:
Cost of Goods and Services Sold	466	442	367
MidAmerican Funding, LLC and Subsidiaries [Domain]
Operating revenue:
Total operating revenue	3,053	2,846	2,631
Energy:
Operations and maintenance	813	802	709
Utilities Operating Expense, Depreciation and Amortization	609	500	479
Taxes, other than income taxes	125	119	112
Total operating expenses	2,503	2,302	2,080
Operating income	550	544	551
Other income (expense):
Interest expense	(247)	(237)	(219)
Capitalized interest and allowance for borrowed funds	20	15	8
Allowance for equity funds	53	41	19
Other, net	31	9	34
Total other income (expense)	(143)	(172)	(158)
Income before income tax (benefit) expense and equity income (loss)	407	372	393
Income tax (benefit) expense	(262)	(202)	(139)
Net income (loss) attributable to parent	669	574	532
MidAmerican Funding, LLC and Subsidiaries [Domain] | Electricity, US Regulated [Member]
Operating revenue:
Total operating revenue	2,283	2,108	1,985
Energy:
Cost of Goods and Services Sold	487	434	409
MidAmerican Funding, LLC and Subsidiaries [Domain] | Regulated natural gas and other [Member]
Operating revenue:
Total operating revenue	770	738	646
Energy:
Cost of Goods and Services Sold	469	447	371
Nevada Power Company [Member]
Operating revenue:
Total operating revenue	2,184	2,206	2,083
Energy:
Cost of Goods and Services Sold	917	902	768
Operations and maintenance	443	391	391
Utilities Operating Expense, Depreciation and Amortization	337	308	303
Taxes, other than income taxes	41	40	38
Total operating expenses	1,738	1,641	1,500
Operating income	446	565	583
Other income (expense):
Interest expense	(170)	(179)	(185)
Capitalized interest and allowance for borrowed funds	2	1	4
Allowance for equity funds	3	1	2
Other, net	17	23	21
Total other income (expense)	(148)	(154)	(158)
Income before income tax (benefit) expense and equity income (loss)	298	411	425
Income tax (benefit) expense	72	156	146
Net income (loss) attributable to parent	226	255	279
Sierra Pacific Power Company [Member]
Operating revenue:
Total operating revenue	855	812	812
Energy:
Operations and maintenance	190	167	169
Utilities Operating Expense, Depreciation and Amortization	119	114	118
Taxes, other than income taxes	23	24	24
Total operating expenses	703	615	631
Operating income	152	197	181
Other income (expense):
Interest expense	(44)	(43)	(54)
Capitalized interest and allowance for borrowed funds	1	2	4
Allowance for equity funds	4	3	(1)
Other, net	9	5	3
Total other income (expense)	(30)	(33)	(48)
Income before income tax (benefit) expense and equity income (loss)	122	164	133
Income tax (benefit) expense	30	55	49
Net income (loss) attributable to parent	92	109	84
Sierra Pacific Power Company [Member] | Electricity, US Regulated [Member]
Operating revenue:
Total operating revenue	752	713	702
Energy:
Cost of Goods and Services Sold	322	268	265
Sierra Pacific Power Company [Member] | Natural Gas, US Regulated [Member]
Operating revenue:
Total operating revenue	103	99	110
Energy:
Cost of Goods and Services Sold	$ 49	$ 42	$ 55