Leases - Components of Lease Cost and Rent Expense (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Leases [Abstract]
Operating lease cost	$ 211	$ 211	$ 196
Short-term rent expense	90	87	92
Variable lease cost	23	24	25
Sublease income	(5)	(5)	(5)
Total operating lease cost	319	317	308
Finance lease cost:
Amortization of ROU assets	13	13	9
Interest on finance lease liabilities	13	15	9
Total finance lease cost	$ 26	$ 28	$ 18