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Accounts Payable and Accrued Liabilities - Components of Accounts Payable and Accrued Liabilities (Detail) - USD ($)
$ in Millions
Dec. 31, 2016
Dec. 31, 2015
Payables And Accruals [Abstract]    
Accounts payable $ 84.9 $ 96.1
Accrued sales discounts and rebates 20.9 18.9
Employee benefits 17.7 14.2
Reserve for uncertain tax positions 3.3  
Interest rate swap contract 2.9 3.3
Accrued workforce reduction costs 1.2 5.3
Other 27.9 34.9
Total $ 158.8 $ 172.7