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Other Financial Data - Schedule of Other Non-Current Liabilities (Details) - USD ($) $ in Millions | Dec. 31, 2017 | Dec. 31, 2016
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Other Financial Data [Abstract] |  |
Taxes payable | $ 529 | $ 288
Leases | 153 | 136
Compensation and benefits | 67 | 56
Deferred revenue | 49 | 49
Other | 304 | 190
Total other non-current liabilities | 1,102 | $ 719
Transition tax for accumulated foreign earnings, noncurrent | $ 222 |

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