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 |