Exit Activities - Reserve Activity (Detail) - USD ($) $ in Millions |
12 Months Ended | |||
|---|---|---|---|---|
Dec. 31, 2015 |
Dec. 31, 2014 |
Dec. 31, 2013 |
Dec. 31, 2012 |
|
| 2013 Exit Activity [Member] | Lease Termination [Member] | ||||
| Restructuring Cost and Reserve [Line Items] | ||||
| Restructuring Reserve | $ 0.1 | $ 0.3 | $ 1.5 | $ 0.0 |
| Charge | 0.0 | 0.0 | 2.0 | |
| Cash Expenditure | (0.2) | (1.2) | (0.5) | |
| 2013 Exit Activity [Member] | Severance [Member] | ||||
| Restructuring Cost and Reserve [Line Items] | ||||
| Restructuring Reserve | 0.0 | 0.0 | 1.3 | 0.0 |
| Charge | 0.0 | 0.0 | 1.8 | |
| Cash Expenditure | 0.0 | (1.3) | (0.5) | |
| 2014 Exit Activity [Member] | Lease Termination [Member] | ||||
| Restructuring Cost and Reserve [Line Items] | ||||
| Restructuring Reserve | 0.1 | 0.5 | 0.0 | 0.0 |
| Charge | 0.0 | 2.1 | 0.0 | |
| Cash Expenditure | (0.4) | (1.6) | 0.0 | |
| 2014 Exit Activity [Member] | Severance [Member] | ||||
| Restructuring Cost and Reserve [Line Items] | ||||
| Restructuring Reserve | 0.4 | 2.3 | 0.0 | $ 0.0 |
| Charge | 0.0 | 7.8 | 0.0 | |
| Cash Expenditure | $ (1.9) | $ (5.5) | $ 0.0 | |