Accounts and Other Receivables - Accounts and Other Receivables (Detail) - USD ($) $ in Millions |
Dec. 31, 2016 |
Dec. 31, 2015 |
|---|---|---|
| Accounts Notes And Loans Receivable [Line Items] | ||
| Allowance for doubtful accounts | $ (0.7) | $ (1.1) |
| Total | 241.1 | 218.3 |
| Trade receivables | ||
| Accounts Notes And Loans Receivable [Line Items] | ||
| Accounts and other receivables | 224.8 | 194.8 |
| Recoverable VAT and other receivables | ||
| Accounts Notes And Loans Receivable [Line Items] | ||
| Accounts and other receivables | 16.7 | 17.8 |
| Refundable income taxes | ||
| Accounts Notes And Loans Receivable [Line Items] | ||
| Refundable income taxes | $ 0.3 | $ 6.8 |