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Other Financial Data - Schedule of Other Current Liabilities (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020 | Dec. 31, 2020
Other Financial Data [Abstract] |  |  |  |  |
Deferred revenue | $ 334 |  | $ 334 |  | $ 296
Taxes payable | 42 |  | 42 |  | 80
Leases | 217 |  | 217 |  | 234
Liabilities held for sale | 38 |  | 38 |  | 0
Other | 717 |  | 717 |  | 561
Total | 1,348 |  | 1,348 |  | $ 1,171
Revenue recognized from deferred revenue | $ 104 | $ 69 | $ 448 | $ 357 |

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