|
Income Taxes (Uncertain Tax Positions) (Details) (USD $)
In Millions, unless otherwise specified |
12 Months Ended | ||
|---|---|---|---|
|
Dec. 31, 2013
|
Dec. 31, 2012
|
Dec. 31, 2011
|
|
| Income Tax Contingency [Line Items] | |||
| Accrued liability for uncertain tax | $ 28.9 | $ 18.8 | $ 0.6 |
| Reconciliation of Unrecognized Tax Benefits, Excluding Interests and Penalties [Roll Forward] | |||
| Additions for tax positions related to prior years | 26.5 | ||
| Reductions for tax positions related to prior years | (16.8) | ||
| Additions based on tax positions related to the current year | 0.4 | ||
| Balance at December 31 | 18.8 | ||
| Accrued interest for uncertain tax positions | $ 4.7 | $ 0.5 |