Consolidated Statements of Operations - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Operating revenue:
Energy	$ 14,621	$ 15,354	$ 15,182
Real estate	2,801	2,526	2,144
Total operating revenue	17,422	17,880	17,326
Energy:
Cost of sales	4,315	5,079	5,732
Operating expense	3,707	3,732	3,501
Depreciation and amortization	2,560	2,399	2,028
Real estate	2,589	2,342	2,019
Total operating costs and expenses	13,171	13,552	13,280
Operating income	4,251	4,328	4,046
Other income (expense):
Interest expense	(1,854)	(1,904)	(1,711)
Capitalized interest and allowance for borrowed funds	139	74	89
Allowance for equity funds	158	91	98
Other Interest and Dividend Income	120	107	38
Other, net	36	39	42
Total other income (expense)	(1,401)	(1,593)	(1,444)
Income before income tax expense and equity income	2,850	2,735	2,602
Income tax expense	403	450	589
Equity income (loss)	123	115	109
Net income	2,570	2,400	2,122
Net income attributable to noncontrolling interests	28	30	27
Net income (loss) attributable to parent	2,542	2,370	2,095
PacifiCorp [Member]
Operating revenue:
Electric Domestic Regulated Revenue	5,201	5,232	5,252
Energy:
Energy costs	1,751	1,868	1,997
Operations and maintenance	1,064	1,082	1,057
Utilities Operating Expense, Depreciation and Amortization	770	757	726
Taxes, other than income taxes	190	185	172
Total operating costs and expenses	3,775	3,892	3,952
Operating income	1,426	1,340	1,300
Other income (expense):
Interest expense	(380)	(379)	(379)
Capitalized interest and allowance for borrowed funds	15	18	25
Allowance for equity funds	27	33	51
Other, net	15	11	10
Total other income (expense)	(323)	(317)	(293)
Income before income tax expense and equity income	1,103	1,023	1,007
Income tax expense	340	328	309
Net income (loss) attributable to parent	763	695	698
MidAmerican Energy Company [Member]
Operating revenue:
Electric Domestic Regulated Revenue	1,985	1,837	1,817
Gas Domestic Regulated Revenue and Other	640	665	1,005
Total operating revenue	2,625	2,502	2,822
Energy:
Energy costs	409	433	532
Cost of natural gas purchases and other	367	398	720
Operations and maintenance	693	705	717
Utilities Operating Expense, Depreciation and Amortization	479	407	351
Taxes, other than income taxes	112	110	108
Total operating costs and expenses	2,060	2,053	2,428
Operating income	565	449	394
Other income (expense):
Interest expense	(196)	(183)	(174)
Capitalized interest and allowance for borrowed funds	8	8	16
Allowance for equity funds	19	20	39
Other, net	14	5	10
Total other income (expense)	(155)	(150)	(109)
Income before income tax expense and equity income	410	299	285
Income tax expense	(132)	(147)	(116)
Net income	542	446	401
Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax	0	22	28
Discontinued Operation, Tax Effect of Discontinued Operation	0	6	12
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent	0	16	16
Net income (loss) attributable to parent	542	462	417
MidAmerican Funding, LLC and Subsidiaries [Domain]
Operating revenue:
Electric Domestic Regulated Revenue	1,985	1,837	1,817
Gas Domestic Regulated Revenue and Other	646	678	1,027
Total operating revenue	2,631	2,515	2,844
Energy:
Energy costs	409	433	532
Cost of natural gas purchases and other	371	407	738
Operations and maintenance	694	707	720
Utilities Operating Expense, Depreciation and Amortization	479	407	351
Taxes, other than income taxes	112	110	108
Total operating costs and expenses	2,065	2,064	2,449
Operating income	566	451	395
Other income (expense):
Interest expense	(219)	(206)	(197)
Capitalized interest and allowance for borrowed funds	8	8	16
Allowance for equity funds	19	20	39
Other, net	19	19	18
Total other income (expense)	(173)	(159)	(124)
Income before income tax expense and equity income	393	292	271
Income tax expense	(139)	(150)	(122)
Net income	532	442	393
Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax	0	22	28
Discontinued Operation, Tax Effect of Discontinued Operation	0	6	12
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent	0	16	16
Net income (loss) attributable to parent	532	458	409
Nevada Power Company [Member]
Operating revenue:
Total operating revenue	2,083	2,402	2,337
Energy:
Cost of sales	768	1,084	1,076
Operations and maintenance	394	372	413
Utilities Operating Expense, Depreciation and Amortization	303	297	274
Taxes, other than income taxes	38	36	33
Total operating costs and expenses	1,503	1,789	1,796
Operating income	580	613	541
Other income (expense):
Interest expense	(185)	(190)	(208)
Capitalized interest and allowance for borrowed funds	4	3	1
Allowance for equity funds	2	4	1
Other, net	24	20	22
Total other income (expense)	(155)	(163)	(184)
Income before income tax expense and equity income	425	450	357
Income tax expense	146	162	130
Net income (loss) attributable to parent	279	288	227
Sierra Pacific Power Company [Member]
Operating revenue:
Electric Domestic Regulated Revenue	702	810	779
Gas Domestic Regulated Revenue	110	137	125
Total operating revenue	812	947	904
Energy:
Cost of sales	265	374	361
Cost of Purchased Oil and Gas	55	84	76
Operations and maintenance	170	167	162
Utilities Operating Expense, Depreciation and Amortization	118	113	105
Taxes, other than income taxes	24	25	22
Total operating costs and expenses	632	763	726
Operating income	180	184	178
Other income (expense):
Interest expense	(54)	(61)	(61)
Capitalized interest and allowance for borrowed funds	4	2	2
Allowance for equity funds	(1)	2	3
Other, net	4	3	12
Total other income (expense)	(47)	(54)	(44)
Income before income tax expense and equity income	133	130	134
Income tax expense	49	47	47
Net income (loss) attributable to parent	$ 84	$ 83	$ 87