Receivables - Schedule of Allowances for Receivables (Detail) - USD ($) $ in Millions |
Dec. 31, 2016 |
Dec. 31, 2015 |
|---|---|---|
| Financing Receivable, Allowance for Credit Losses [Line Items] | ||
| Allowance for receivables | $ 9.1 | $ 11.5 |
| Doubtful Accounts [Member] | ||
| Financing Receivable, Allowance for Credit Losses [Line Items] | ||
| Allowance for receivables | 1.7 | 1.5 |
| Pricing Accruals and Anticipated Customer Deductions [Member] | ||
| Financing Receivable, Allowance for Credit Losses [Line Items] | ||
| Allowance for receivables | 5.1 | 8.1 |
| Returns [Member] | ||
| Financing Receivable, Allowance for Credit Losses [Line Items] | ||
| Allowance for receivables | $ 2.3 | $ 1.9 |