Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions |
Jun. 30, 2017 |
Dec. 31, 2016 |
|---|---|---|
| Statement Of Financial Position [Abstract] | ||
| Allowance for doubtful accounts and customer deductions | $ 10.2 | $ 10.1 |
| Common stock, par value (in dollars per share) | $ 0.01 | $ 0.01 |
| Common stock, shares authorized | 300,000,000 | 300,000,000 |
| Common stock, shares issued | 94,400,000 | 94,200,000 |