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Supplemental Balance Sheet Information - Other Long-Term Liabilities (Details) - USD ($) $ in Millions | Dec. 31, 2017 | Dec. 31, 2016
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Organization, Consolidation and Presentation of Financial Statements [Abstract] |  |
Taxes payable | $ 10.0 | $ 3.4
Accrued compensation benefits | 4.6 | 4.4
Other | 17.2 | 16.0
Total | $ 31.8 | $ 23.8

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