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	$ 2,198					617				617
Total other comprehensive (loss) income, net of tax	1,088	$ 0	$ 0	$ 0	$ 1,088
Dividends, Common Stock, Cash						(500)				(500)
Stockholders' Equity Attributable to Parent at Sep. 30, 2017						7,507	2	0	4,479	3,038	(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	2,286					602				602
Total other comprehensive (loss) income, net of tax	(184)	$ 0	$ 0	$ 0	$ (184)
Dividends, Common Stock, Cash						(400)				(400)
Stockholders' Equity Attributable to Parent at Sep. 30, 2018	$ 29,557					$ 7,757	$ 2	$ 0	$ 4,479	$ 3,291	$ (15)