Commitments and Contingencies - Additional Information (Detail) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
|
| Other Commitments [Line Items] | |||
| Commitments for the purchase of property, plant and equipment related to incomplete projects | $ 4.5 | ||
| Commitments for outsourced services, professional, maintenance and other services | 34.3 | ||
| Severance commitments related to restructuring | 1.7 | $ 2.2 | |
| Operating lease commitments | 117.5 | ||
| Minimum non-cancelable sublease rental commitments | 34.7 | ||
| Rent expense | 23.8 | $ 22.2 | $ 22.5 |
| Employee terminations | |||
| Other Commitments [Line Items] | |||
| Severance commitments related to restructuring | $ 1.6 | ||