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Income Taxes (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Income Tax Provision        
indefinite reinvestment of non-US earnings $ 6.3   $ 12.5  
Liability for uncertain tax positions including interest and related charges 27.6   27.6  
Accrued income tax interest and related charges 1.9   1.9  
Unrecognized tax benefits that, if recognized, would affect effective tax rate $ 25.5   $ 25.5  
Parent Company        
Income Tax Provision        
Effective tax rate attributable to controlling interests [1] 35.00% 36.80% 34.50% 37.00%
[1] Taxes attributable to the controlling interest divided by Income before income taxes (controlling interest).