Maturities of Lease Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Lessee, Operating Lease, Liability, Payment, Due [Abstract]
Operating Leases, 2022	$ 353
Operating Leases, 2023	314
Operating Leases, 2024	265
Operating Leases, 2025	180
Operating Leases, 2026	73
Operating Leases, Thereafter	341
Operating Leases, Total lease payments	1,526
Operating Leases, Less amount representing interest	(183)
Operating Leases, Total	1,343	$ 1,677
Finance Lease, Liability, Payment, Due [Abstract]
Finance Lease, 2022	36
Finance Lease, 2023	28
Finance Lease, 2024	24
Finance Lease, 2025	23
Finance Lease, 2026	23
Finance Lease, Thereafter	30
Finance Lease, Total lease payments	164
Finance Lease, Less amount representing interest	(25)
Finance leases, Total	$ 139	$ 325