Quarterly Results of Operations (Unaudited) - Quarterly Results of Operation (Detail) - USD ($) $ / shares in Units, $ in Millions |
3 Months Ended | 12 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2016 |
Sep. 30, 2016 |
Jun. 30, 2016 |
Mar. 31, 2016 |
Dec. 31, 2015 |
Sep. 30, 2015 |
Jun. 30, 2015 |
Mar. 31, 2015 |
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
|
| Selected Quarterly Financial Information [Abstract] | |||||||||||
| Net sales | $ 333.7 | $ 356.1 | $ 356.1 | $ 318.4 | $ 287.0 | $ 336.5 | $ 360.2 | $ 365.1 | $ 1,364.3 | $ 1,348.8 | $ 1,651.9 |
| Gross margin | 85.6 | 75.5 | 55.5 | 40.4 | 25.2 | 43.2 | 46.5 | 77.4 | 257.0 | 192.3 | 349.7 |
| Net income (loss) | $ 23.2 | $ 22.2 | $ 1.7 | $ (3.8) | $ (20.4) | $ (11.8) | $ (159.8) | $ 18.4 | $ 43.3 | $ (173.6) | $ 99.2 |
| Basic and diluted income (loss) per share | $ 0.20 | $ 0.19 | $ 0.01 | $ (0.03) | $ (0.18) | $ (0.10) | $ (1.38) | $ 0.16 | $ 0.37 | $ (1.50) | $ 0.86 |