Leases - Components of Lease Expense (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Leases [Abstract]
Operating lease expense	$ 15	$ 31	$ 34
Finance lease expense:
Amortization of ROU assets	18	28	25
Interest on lease liabilities	15	15	15
Total finance lease expense	$ 33	$ 43	$ 40