Debt, Interest Income, Expense and Other Finance Costs - Schedule of Debt (Details) - USD ($) $ in Millions |
Mar. 31, 2018 |
Dec. 31, 2017 |
|---|---|---|
| Debt Instrument [Line Items] | ||
| Total debt | $ 834.4 | $ 910.2 |
| Current maturities of long-term debt and capital leases | 33.6 | 25.6 |
| Long-term debt | 800.8 | 884.6 |
| Credit Facility | ||
| Debt Instrument [Line Items] | ||
| Total debt | 289.0 | 60.0 |
| Term Loans | ||
| Debt Instrument [Line Items] | ||
| Total debt | 531.6 | 835.8 |
| Capital leases | ||
| Debt Instrument [Line Items] | ||
| Total debt | 10.0 | 10.4 |
| Other | ||
| Debt Instrument [Line Items] | ||
| Total debt | $ 3.8 | $ 4.0 |