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Income Taxes (Details 5) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Reconciliation of the unrecognized tax benefits |  |  |
Balance beginning of year | $ 55.5 | $ 45.2 | $ 36.9
Increase based on prior year tax positions | 0.0 | 0.5 | 0.0
Decrease based on prior year tax positions | 0.0 | 0.0 | (6.4)
Increases in current year tax positions | 9.8 | 9.8 | 14.7
Settlements | 0.0 | 0.0 | 0.0
Reductions related to expirations of statute of limitations | (16.3) | 0.0 | 0.0
Balance end of year | $ 49.0 | $ 55.5 | $ 45.2

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