Leases - Supplemental Balance Sheet Information Related to Leases (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Operating Leases:
Operating lease right-of-use assets	$ 642	$ 665
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Other assets, net	Other assets, net
Finance Leases:
Property and equipment	$ 9,607	$ 9,511
Less accumulated depreciation and amortization	(4,388)	(4,304)
Property and equipment, net	5,219	5,207
Current finance lease liabilities	$ 2	$ 2
Finance Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Current maturities of long-term debt	Current maturities of long-term debt
Long-term finance lease liabilities		$ 214
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	Long-term debt	Long-term debt
Finance Lease ROU Assets
Finance Leases:
Property and equipment	$ 256	$ 256
Less accumulated depreciation and amortization	(56)	(55)
Property and equipment, net	200	201
Finance Lease ROU Assets | Building and Improvements
Finance Leases:
Property and equipment	246	246
Finance Lease ROU Assets | Equipment and Fixtures
Finance Leases:
Property and equipment	$ 10	$ 10