Property, Plant and Equipment - Additional Information (Detail) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2016 |
Sep. 30, 2015 |
Sep. 30, 2016 |
Sep. 30, 2015 |
|
| Property, Plant and Equipment [Abstract] | ||||
| Depreciation expense related to property, plant and equipment | $ 43.0 | $ 38.1 | $ 128.7 | $ 100.6 |