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Commitments and Contingencies - Lease Cost (Details) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Commitments and Contingencies Disclosure [Abstract]    
Right-of-use assets $ 419 $ 423
Lease liabilities, current 112 109
Lease liabilities, noncurrent $ 310 $ 325
Weighted-average remaining lease term 5 years 4 months 24 days 5 years 7 months 6 days
Weighted-average discount rate 2.86% 2.57%
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] Other Assets, Noncurrent Other Assets, Noncurrent
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List] Other Liabilities, Current Other Liabilities, Current
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List] Other noncurrent liabilities Other noncurrent liabilities