Condensed Statements of Comprehensive Income (Loss) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2018 |
Jun. 30, 2017 |
Jun. 30, 2018 |
Jun. 30, 2017 |
|
| Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract] | ||||
| Net income (loss) | $ 58.6 | $ (5.9) | $ 79.5 | $ 7.5 |
| Other comprehensive (loss) income, net of tax: | ||||
| Foreign currency translation adjustments, net | (26.1) | 15.9 | (13.7) | 21.9 |
| Unrealized losses on derivative contracts, net | (2.4) | (3.7) | (2.5) | (5.7) |
| Amortization of prior service costs and actuarial losses, net | 8.1 | 4.5 | 13.5 | 8.4 |
| Total other comprehensive (loss) income, net of tax | (20.4) | 16.7 | (2.7) | 24.6 |
| Comprehensive income | $ 38.2 | $ 10.8 | $ 76.8 | $ 32.1 |