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Other Financial Data - Schedule of Other Non-current Liabilities (Details) - USD ($) $ in Millions | Jun. 30, 2019 | Dec. 31, 2018
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Other Financial Data [Abstract] |  |
Taxes payable | $ 576 | $ 585
Leases | 37 | 169
Deferred revenue | 59 | 65
Compensation and benefits | 49 | 56
Other | 203 | 222
Total | 924 | 1,097
Noncurrent portion of transition tax | $ 221 | $ 240

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