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Other Financial Data - Schedule of Other Current Assets (Details) - USD ($) $ in Millions | Mar. 31, 2017 | Dec. 31, 2016
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Other Financial Data [Abstract] |  |
Taxes receivable | $ 147 | $ 100
Prepaid expenses | 125 | 102
Other | 37 | 45
Total | $ 309 | $ 247

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