Leases Maturities of Lease Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Leases [Abstract]
Operating Leases, Future Minimum Payments Due, Next Twelve Months	$ 3
Lessee, Operating Lease, Liability, Payments, Due Year Two	1
Lessee, Operating Lease, Liability, Payments, Due Year Three	1
Lessee, Operating Lease, Liability, Payments, Due Year Four	1
Lessee, Operating Lease, Liability, Payments, Due Year Five	1
Lessee, Operating Lease, Liability, Payments, Due after Year Five	40
Lessee, Operating Lease, Liability, Payments, Due	47
Lessee, Operating Lease, Liability, Undiscounted Excess Amount	(28)
Operating Lease, Liability	19	$ 22
Finance Lease, Liability, Payments, Due Year One	20
Finance Lease, Liability, Payments, Due Year Two	27
Finance Lease, Liability, Payments, Due Year Three	27
Finance Lease, Liability, Payments, Due Year Four	27
Finance Lease, Liability, Payments, Due Year Five	26
Finance Lease, Liability, Payments, Due after Year Five	356
Finance Lease, Liability, Payment, Due	483
Finance Lease, Liability, Undiscounted Excess Amount	(174)
Finance Lease, Liability	$ 309	$ 314