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Other Financial Data - Schedule of Other Non-current Liabilities (Details) - USD ($) $ in Millions | Sep. 30, 2021 | Dec. 31, 2020
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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

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