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Other Financial Data - Schedule of Other Current Liabilities (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2020 | Dec. 31, 2019
Other Financial Data [Abstract] |  |
Deferred revenue | $ 309 | $ 270
Leases | 200 | 210
Taxes payable | 196 | 93
Other | 572 | 513
Total | 1,277 | 1,086
Revenue recognized from deferred revenue | $ 117 | $ 532

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