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Other Financial Data - Schedule of Other Current Assets (Details) - USD ($) $ in Millions | Dec. 31, 2019 | Dec. 31, 2018
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Other Financial Data [Abstract] |  |
Costs to fulfill contracts with customers | $ 335 | $ 329
Taxes receivable | 88 | 113
Prepaid expenses | 97 | 97
Receivables from the Divested Business | 4 | 12
Other | 78 | 67
Total | $ 602 | $ 618

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