Leases - Future Maturities of Lease Liabilities - ASC 842 (Details) - USD ($) $ in Millions		Dec. 31, 2021	Dec. 31, 2020
Operating Leases
2022		$ 255
2023		212
2024		171
2025		137
2026		110
Thereafter		428
Total Lease Payments		1,313
Less: Imputed Interest		290
Total Operating Lease Liabilities		1,023	$ 882
Finance Leases
2022		37
2023		24
2024		23
2025		22
2026		22
Thereafter		652
Total Lease Payments		780
Less: Imputed Interest		525
Total Finance Lease Liabilities	[1]	$ 255	$ 250

[1] Includes non-cash financing additions of $14 million and $3 million during the twelve month period ended December 31, 2021 and 2020, respectively.