Other Income (Expense), Net (Details) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2017 |
Jun. 30, 2016 |
Jun. 30, 2017 |
Jun. 30, 2016 |
|
| Other Income And Expenses [Abstract] | ||||
| DeRidder mill incident | $ 2.5 | $ (2.5) | ||
| Integration-related, facilities closure and other costs | (0.5) | $ (2.6) | (1.3) | $ (4.5) |
| Hexacomb working capital adjustment | 2.3 | |||
| Asset disposals and write-offs | (2.4) | (1.1) | (4.7) | (2.9) |
| Other | (0.2) | (1.4) | (1.4) | (1.6) |
| Total | $ (0.6) | $ (5.1) | $ (7.6) | $ (9.0) |