Leases - Supplemental Balance Sheet Information (Details) - USD ($) $ in Millions		Dec. 31, 2021	Dec. 31, 2020
Operating Leases
Operating Lease ROU Assets		$ 981	$ 851
Operating Lease Liabilities due Within One Year		204	198
Operating Lease Liabilities		819	684
Total Operating Lease Liabilities		1,023	882
Finance Leases
Property, Plant and Equipment, at cost		264	262
Accumulated Depreciation		(64)	(60)
Property, Plant and Equipment, net		200	202
Long Term Debt and Finance Leases due Within One Year		18	18
Long Term Debt and Finance Leases		237	232
Total Finance Lease Liabilities	[1]	$ 255	$ 250
Finance Lease, Liability, Statement of Financial Position [Extensible Enumeration]		Long-term Debt and Lease Obligation	Long-term Debt and Lease Obligation
Weighted Average Remaining Lease Term
Operating Leases		7 years 6 months	7 years 3 months 18 days
Finance Leases		30 years 1 month 6 days	30 years 10 months 24 days
Weighted Average Discount Rate
Operating Leases		6.30%	6.85%
Finance Leases		8.40%	8.48%

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