Employee Benefit Plans - PacifiCorp - Net Periodic Benefit Cost (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Accumulated Benefit Obligation, (Increase) Decrease for Settlement and Curtailment	$ 0	$ 0	$ 0
Defined Benefit Plan, Plan Assets, Payment for Settlement	0	0
Defined Benefit Plan, Service Cost	8	9	9
Defined Benefit Plan, Interest Cost	27	24	29
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(40)	(41)	(40)
Defined Benefit Plan Net Amortization	(6)	(13)	(14)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	(11)	(21)	(16)
Other Postretirement Benefits Plan [Member] | PacifiCorp [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Accumulated Benefit Obligation, (Increase) Decrease for Settlement and Curtailment	0	0	0
Defined Benefit Plan, Service Cost	2	2	2
Defined Benefit Plan, Interest Cost	12	11	14
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(21)	(21)	(21)
Defined Benefit Plan Net Amortization	0	(6)	(6)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	(7)	(14)	(11)
UNITED STATES | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Accumulated Benefit Obligation, (Increase) Decrease for Settlement and Curtailment	0	21	0
Defined Benefit Plan, Plan Assets, Payment for Settlement	22	119
Defined Benefit Plan, Service Cost	16	21	24
Defined Benefit Plan, Interest Cost	111	105	116
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(154)	(164)	(160)
Defined Benefit Plan Net Amortization	31	28	25
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	4	11	5
UNITED STATES | Pension Plan [Member] | PacifiCorp [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Accumulated Benefit Obligation, (Increase) Decrease for Settlement and Curtailment	0	22	0
Defined Benefit Plan, Plan Assets, Payment for Settlement	0	52
Defined Benefit Plan, Service Cost	0	0	0
Defined Benefit Plan, Interest Cost	44	43	49
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(67)	(72)	(72)
Defined Benefit Plan Net Amortization	11	13	14
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	$ (12)	$ 6	$ (9)