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Accrued Liabilities - Components of Accrued Liabilities (Detail) - USD ($)
$ in Millions
Dec. 31, 2016
Dec. 31, 2015
Accrued Liabilities Current [Abstract]    
Employee-related liabilities $ 175.3 $ 172.0
Deferred revenue 106.6 95.5
Restructuring liabilities 6.0 6.6
Other 253.8 188.0
Total accrued liabilities $ 541.7 $ 462.1