Subsidiary Debt Subsidiary Debt - PacifiCorp - Annual Payment on Long-Term Debt (Details) - USD ($) $ in Millions		Dec. 31, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months		$ 2,539
Capital Leases, Future Minimum Payments Due, Next Twelve Months	[1]		$ 69
Long-term Debt, Maturities, Repayments of Principal in Year Two		1,308
Capital Leases, Future Minimum Payments Due in Two Years	[1]		68
Long-term Debt, Maturities, Repayments of Principal in Year Three		1,792
Capital Leases, Future Minimum Payments Due in Three Years	[1]		73
Long-term Debt, Maturities, Repayments of Principal in Year Four		2,508
Capital Leases, Future Minimum Payments Due in Four Years	[1]		67
Long-term Debt, Maturities, Repayments of Principal in Year Five		1,615
Capital Leases, Future Minimum Payments Due in Five Years	[1]		56
Long-term Debt, Maturities, Repayments of Principal after Year Five		29,872
Capital Leases, Future Minimum Payments Due Thereafter	[1]		772
Par value		39,634
Capital Leases, Future Minimum Payments Due	[1]		1,105
Long-term Debt		39,353	36,774
PacifiCorp [Member]
Debt Instrument [Line Items]
Capital Leases, Future Minimum Payments Due, Next Twelve Months	[2]		4
Capital Leases, Future Minimum Payments Due in Two Years	[2]		4
Capital Leases, Future Minimum Payments Due in Three Years	[2]		7
Capital Leases, Future Minimum Payments Due in Four Years	[2]		3
Capital Leases, Future Minimum Payments Due in Five Years	[2]		2
Capital Leases, Future Minimum Payments Due Thereafter	[2]		16
Capital Leases, Future Minimum Payments Due	[2]		36
Long-term Debt		7,658	$ 7,015
PacifiCorp [Member] | Long-term Debt [Member]
Debt Instrument [Line Items]
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months		38
Long-term Debt, Maturities, Repayments of Principal in Year Two		420
Long-term Debt, Maturities, Repayments of Principal in Year Three		605
Long-term Debt, Maturities, Repayments of Principal in Year Four		449
Long-term Debt, Maturities, Repayments of Principal in Year Five		591
Long-term Debt, Maturities, Repayments of Principal after Year Five		5,602
Par value		7,705
Debt Instrument, Unamortized Premium, Discount and Debt Issuance Cost		(47)
Long-term Debt		$ 7,658

[1] Amounts included for comparability and accounted for in accordance with ASC Topic 840, "Leases".

[2] (1) Amounts included for comparability and accounted for in accordance with ASC 840, "Leases".