Leases Leases - PAC - Lease Costs (Details) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2019 USD ($)
Lessee, Lease, Description [Line Items]
Variable Lease, Cost	$ 623
Operating Lease, Cost	170
Finance Lease, Right-of-Use Asset, Amortization	16
Finance Lease, Interest Expense	41
Short-term Lease, Cost	7
Lease, Cost	$ 857
Operating Lease, Weighted Average Remaining Lease Term	7 years 7 months 21 days
Finance Lease, Weighted Average Remaining Lease Term	28 years 10 months 2 days
Operating Lease, Weighted Average Discount Rate, Percent	5.20%
Finance Lease, Weighted Average Discount Rate, Percent	8.60%
PacifiCorp [Member]
Lessee, Lease, Description [Line Items]
Variable Lease, Cost	$ 77
Operating Lease, Cost	3
Finance Lease, Right-of-Use Asset, Amortization	1
Finance Lease, Interest Expense	2
Short-term Lease, Cost	2
Lease, Cost	$ 85
Operating Lease, Weighted Average Remaining Lease Term	13 years 11 months 16 days
Finance Lease, Weighted Average Remaining Lease Term	9 years 1 month 21 days
Operating Lease, Weighted Average Discount Rate, Percent	3.70%
Finance Lease, Weighted Average Discount Rate, Percent	10.60%