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Other Financial Data - Schedule of Other Current Liabilities (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018
Other Financial Data [Abstract] |  |
Deferred revenue | $ 270 | $ 251
Taxes payable | 93 | 83
Leases | 210 |
Other | 513 | 602
Total | 1,086 | 936
Deferred revenue recognized | $ 532 | $ 487

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