Other Assets (Details) - USD ($) $ in Millions |
Dec. 31, 2017 |
Dec. 31, 2016 |
|---|---|---|
| Other Assets, Noncurrent Disclosure [Abstract] | ||
| Deposits | $ 11.4 | $ 12.4 |
| Deferred profit sharing asset | 11.3 | 11.3 |
| Income tax receivable | 75.4 | 31.9 |
| Derivative instruments | 0.8 | 1.6 |
| Equity method investment in unconsolidated entities | 4.0 | 3.5 |
| Marketable securities | 4.1 | 4.1 |
| Other | 37.9 | 22.1 |
| Other assets | $ 144.9 | $ 86.9 |