Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Net income	$ 2,591	$ 2,910	$ 2,570
Net income (loss) attributable to parent	2,568	2,870	2,542
Other comprehensive income (loss), net of tax:
Unrecognized amounts on retirement benefits, net of tax	(25)	(64)	9
Foreign currency translation adjustment	(494)	546	(583)
Unrealized gains (losses) on available-for-sale securities, net of tax	0	500	(30)
Unrealized (losses) gains on cash flow hedges, net of tax	7	3	19
Total other comprehensive (loss) income, net of tax	(462)	1,113	(603)
Comprehensive income	2,129	4,023	1,967
Comprehensive income attributable to noncontrolling interests	23	40	28
Comprehensive income attributable to shareholders	2,106	3,983	1,939
Parent Company [Member]
Net income	2,571	2,873	2,545
Net income (loss) attributable to parent	2,568	2,870	2,542
Other comprehensive income (loss), net of tax:
Total other comprehensive (loss) income, net of tax	(462)	1,113	(603)
Comprehensive income	2,109	3,986	1,942
Comprehensive income attributable to noncontrolling interests	3	3	3
Comprehensive income attributable to shareholders	2,106	3,983	1,939
Nevada Power Company [Member]
Net income (loss) attributable to parent	226	255	279
PacifiCorp [Member]
Net income (loss) attributable to parent	738	768	763
Other comprehensive income (loss), net of tax:
Unrecognized amounts on retirement benefits, net of tax	2	3	1
Total other comprehensive (loss) income, net of tax	2	(3)	(1)
Comprehensive income attributable to shareholders	740	765	762
MidAmerican Energy Company [Member]
Net income (loss) attributable to parent	682	605	542
Other comprehensive income (loss), net of tax:
Unrealized gains (losses) on available-for-sale securities, net of tax	0	0	3
Total other comprehensive (loss) income, net of tax			3
Comprehensive income attributable to shareholders	682	605	545
MidAmerican Funding, LLC and Subsidiaries [Domain]
Net income (loss) attributable to parent	669	574	532
Other comprehensive income (loss), net of tax:
Unrealized gains (losses) on available-for-sale securities, net of tax	0	0	3
Total other comprehensive (loss) income, net of tax			3
Comprehensive income attributable to shareholders	$ 669	$ 574	$ 535