Leases - PAC - Summary (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Lessee, Lease, Description [Line Items]
Operating Lease, Right-of-Use Asset	$ 517	$ 525
Finance Lease, Right-of-Use Asset	501	504
Total Right-of-Use Asset	1,018	1,029
Operating Lease, Liability	569
Finance Lease, Liability	514
Total Lease Liabilities	1,083	1,096
PacifiCorp [Member]
Lessee, Lease, Description [Line Items]
Operating Lease, Right-of-Use Asset	11	12
Finance Lease, Right-of-Use Asset	17	19
Total Right-of-Use Asset	28	31
Operating Lease, Liability	11	12
Finance Lease, Liability	17	19
Total Lease Liabilities	$ 28	$ 31