Goodwill and Other Intangible Assets - Schedule of Changes in the Carrying Amount of Goodwill by Segment (Details) - USD ($) $ in Millions |
12 Months Ended | |
|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
|
| Goodwill [Line Items] | ||
| Goodwill net book value, beginning balance | $ 446.8 | $ 448.8 |
| Foreign exchange and other adjustments | (0.4) | (2.0) |
| Goodwill net book value, ending balance | 446.4 | 446.8 |
| U.S. | ||
| Goodwill [Line Items] | ||
| Goodwill net book value, beginning balance | 429.2 | 429.2 |
| Foreign exchange and other adjustments | 0.0 | 0.0 |
| Goodwill net book value, ending balance | 429.2 | 429.2 |
| International | ||
| Goodwill [Line Items] | ||
| Goodwill net book value, beginning balance | 17.6 | 19.6 |
| Foreign exchange and other adjustments | (0.4) | (2.0) |
| Goodwill net book value, ending balance | $ 17.2 | $ 17.6 |