Leases - Components of Lease Expense (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Components of lease expense
Total lease cost	$ 66	$ 72	$ 72
General and administrative expenses
Components of lease expense
Operating lease costs	55	61	57
Amortization of ROU assets	10	10	13
Interest and debt expense
Components of lease expense
Finance lease interest expense	$ 1	$ 1	$ 2