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Other Financial Data - Schedule of Other Non-current Liabilities (Details) - USD ($)
$ in Millions
Sep. 30, 2021
Dec. 31, 2020
Other Financial Data [Abstract]    
Taxes payable $ 592 $ 561
Leases 51 65
Deferred revenue 66 76
Compensation and benefits 79 53
Other 131 140
Total 919 895
Noncurrent portion of transition tax $ 145 $ 145