|
Income Taxes (Uncertain Tax Positions) (Details) (USD $)
In Millions, unless otherwise specified |
12 Months Ended | ||
|---|---|---|---|
|
Dec. 31, 2014
|
Dec. 31, 2013
|
Dec. 31, 2012
|
|
| Reconciliation of Unrecognized Tax Benefits, Excluding Interests and Penalties [Roll Forward] | |||
| Balance at January 1 | $ 28.9 | $ 18.8 | $ 0.6 |
| Additions for tax positions related to prior years | 9.0 | 26.5 | 10.3 |
| Reductions for tax positions related to prior years | (0.9) | (13.9) | 0 |
| Additions based on tax positions related to the current year | 3.8 | 0.4 | 7.9 |
| Reductions due to lapse of the applicable statute of limitations | (4.7) | 0 | 0 |
| Decrease related to settlements with taxing authorities | (0.7) | (2.9) | 0 |
| Balance at December 31 | 35.4 | 28.9 | 18.8 |
| Accrued interest for uncertain tax positions | $ 5.9 | $ 4.7 | $ 0.5 |