Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Net income	$ 2,570	$ 2,400	$ 2,122
Net income (loss) attributable to parent	2,542	2,370	2,095
Other comprehensive loss, net of tax:
Unrecognized amounts on retirement benefits, net of tax	(9)	52	69
Foreign currency translation adjustment	(583)	(680)	(314)
Unrealized (losses) gains on cash flow hedges, net of tax	19	(11)	(18)
Total other comprehensive loss, net of tax	(603)	(414)	(397)
Comprehensive income	1,967	1,986	1,725
Comprehensive income attributable to noncontrolling interests	28	30	27
Comprehensive income attributable to shareholders	1,939	1,956	1,698
Nevada Power Company [Member]
Net income (loss) attributable to parent	279	288	227
Parent Company [Member]
Net income	2,545	2,373	2,097
Net income (loss) attributable to parent	2,542	2,370	2,095
Other comprehensive loss, net of tax:
Total other comprehensive loss, net of tax	(603)	(414)	(397)
Comprehensive income	1,942	1,959	1,700
Comprehensive income attributable to noncontrolling interests	3	3	2
Comprehensive income attributable to shareholders	1,939	1,956	1,698
PacifiCorp [Member]
Net income (loss) attributable to parent	763	695	698
Other comprehensive loss, net of tax:
Unrecognized amounts on retirement benefits, net of tax	(1)	2	(4)
Total other comprehensive loss, net of tax	(1)	2	(4)
Comprehensive income attributable to shareholders	762	697	694
MidAmerican Energy Company [Member]
Net income (loss) attributable to parent	542	462	417
Other comprehensive loss, net of tax:
Unrealized gains (losses) on available-for-sale securities, net of tax	3	0	1
Unrealized (losses) gains on cash flow hedges, net of tax	0	(7)	(13)
Total other comprehensive loss, net of tax	3	(7)	(12)
Comprehensive income attributable to shareholders	545	455	405
MidAmerican Funding, LLC and Subsidiaries [Domain]
Net income (loss) attributable to parent	532	458	409
Other comprehensive loss, net of tax:
Unrealized gains (losses) on available-for-sale securities, net of tax	3	0	1
Unrealized (losses) gains on cash flow hedges, net of tax	0	(7)	(13)
Total other comprehensive loss, net of tax	3	(7)	(12)
Comprehensive income attributable to shareholders	$ 535	$ 451	$ 397