Consolidated Statements of Changes in Equity - PacifiCorp - USD ($) $ in Millions	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive (Loss) Income, Net [Member]	PacifiCorp [Member]	PacifiCorp [Member] Preferred Stock [Member]	PacifiCorp [Member] Common Stock [Member]	PacifiCorp [Member] Additional Paid-in Capital [Member]	PacifiCorp [Member] Retained Earnings [Member]	PacifiCorp [Member] Accumulated Other Comprehensive (Loss) Income, Net [Member]
Stockholders' Equity Attributable to Parent at Dec. 31, 2016						$ 7,390	$ 2	$ 0	$ 4,479	$ 2,921	$ (12)
Net Income (Loss) Attributable to Parent	$ 556					179				179
Total other comprehensive (loss) income, net of tax	126	$ 0	$ 0	$ 0	$ 126
Dividends, Common Stock, Cash						(100)				(100)
Stockholders' Equity Attributable to Parent at Mar. 31, 2017						7,469	2	0	4,479	3,000	(12)
Stockholders' Equity Attributable to Parent at Dec. 31, 2017	28,176					7,555	2	0	4,479	3,089	(15)
Net Income (Loss) Attributable to Parent	513					148				148
Total other comprehensive (loss) income, net of tax	68	$ 0	$ 0	$ 0	$ 68
Dividends, Common Stock, Cash						(250)				(250)
Stockholders' Equity Attributable to Parent at Mar. 31, 2018	$ 28,667					$ 7,453	$ 2	$ 0	$ 4,479	$ 2,987	$ (15)