Leases Leases - PacifiCorp - Summary (Details) $ in Millions	Jun. 30, 2019 USD ($)
Lessee, Lease, Description [Line Items]
Operating Lease, Right-of-Use Asset	$ 553
Finance Lease, Right-of-Use Asset	509
Total Right-of-Use Asset	1,062
Operating Lease, Liability	597
Finance Lease, Liability	523
Total Lease Liabilities	1,120
PacifiCorp [Member]
Lessee, Lease, Description [Line Items]
Operating Lease, Right-of-Use Asset	14
Finance Lease, Right-of-Use Asset	20
Total Right-of-Use Asset	34
Operating Lease, Liability	14
Finance Lease, Liability	20
Total Lease Liabilities	$ 34