Leases - Supplemental Cash Flow and Other Information Related to Leases (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Leases [Abstract]
Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases	$ 200	$ 204	$ 197
Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from finance leases	13	15	9
Cash paid for amounts included in the measurement of lease liabilities: Financing cash flows from finance leases	3	9	4
ROU assets obtained in exchange for new finance lease liabilities	1	42	166
ROU assets obtained in exchange for new operating lease liabilities	$ 102	$ 195	$ 143
Weighted-average remaining lease term: Operating leases	9 years	8 years	6 years
Weighted-average remaining lease term: Finance leases	30 years	31 years	30 years
Weighted-average discount rate: Operating leases	8.80%	8.00%	8.10%
Weighted-average discount rate: Finance leases	6.20%	6.40%	6.30%