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Accrued Liabilities (Tables) | 12 Months Ended
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Dec. 31, 2018
Payables And Accruals [Abstract] |
Summary of Accrued Liabilities | Accrued liabilities consist of (in millions):
|  | December 31, |
|  | 2018 |  |  | 2017 |
Compensation and other related expenses |  | $ | 38 |  |  | $ | 36 |
Contract liabilities (1) |  |  | 29 |  |  |  | 19 |
Taxes (non-income) |  |  | 14 |  |  |  | 15 |
Other |  |  | 29 |  |  |  | 33 |
Total |  | $ | 110 |  |  | $ | 103 |
(1) Previously shown as customer credits and prepayments.

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