v2.4.0.6
Income Taxes (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Income Tax Disclosure [Abstract]    
Effective income tax rate reconciliation, tax contingencies 31.90% 36.00%
Income taxes paid, net of refunds received $ 14.0 $ 43.8
Accrued liability for penalties 0.6  
Accrued liability for interest related to uncertain tax positions and penalties 13.6  
Unrecognized tax benefits settlements with taxing authorities, minimum 0  
Unrecognized tax benefits settlements with taxing authorities, maximum $ 10