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Operating Leases - Balance Sheet Classification (Details) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Leases [Abstract]    
Operating lease ROU assets $ 462 $ 534
Operating lease liabilities 146 152
Operating lease liabilities, noncurrent 378 453
Total operating lease liabilities $ 524 $ 605
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List] Other noncurrent assets Other noncurrent assets
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List] Accounts Payable and Accrued Liabilities, Current Accounts Payable and Accrued Liabilities, Current
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List] Other noncurrent liabilities Other noncurrent liabilities