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Other Financial Data - Schedule of Other Current Assets (Details) - USD ($) $ in Millions | Mar. 31, 2019 | Dec. 31, 2018
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Other Financial Data [Abstract] |  |
Cost to fulfill contracts with customers | $ 236 | $ 329
Prepaid expenses | 108 | 97
Taxes receivable | 81 | 113
Other | 106 | 79
Total | $ 531 | 618
Receivables from divested business |  | $ 12

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