Leases Leases (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Leases [Abstract]
Jointly Owned Utility Plant, Ownership Amount of Construction Work in Progress	$ 12
Operating Lease, Liability	22	$ 26
Operating Lease, Liability, Related to Power Purchase Agreements	186	161
Operating Lease, Liability, Current	4	4
Operating Lease, Liability, Noncurrent	18	$ 22
Lessee, Operating Lease, Liability, Payments, Due	$ 52