Leases - Supplemental Balance Sheet Information Related to Leases (Details) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Operating Leases:
Operating lease right-of-use assets	$ 701	$ 668
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Other assets, net	Other assets, net
Finance Leases:
Property and equipment	$ 9,727	$ 9,757
Less accumulated depreciation and amortization	(4,277)	(4,204)
Property and equipment, net	5,450	5,553
Current finance lease liabilities	$ 2	$ 8
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	$ 267	$ 233
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	Long-term debt	Long-term debt
Finance Lease right-of-use Assets
Finance Leases:
Property and equipment	$ 344	$ 314
Less accumulated depreciation and amortization	(63)	(54)
Property and equipment, net	281	260
Finance Lease right-of-use Assets | Land and Improvements
Finance Leases:
Property and equipment	8	8
Finance Lease right-of-use Assets | Building and Improvements
Finance Leases:
Property and equipment	324	289
Finance Lease right-of-use Assets | Equipment and Fixtures
Finance Leases:
Property and equipment	$ 12	$ 17