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Income Taxes (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Operating Loss Carryforwards [Line Items]      
Deferred tax benefits from change in permanent status of foreign subsidiaries $ 17.1 $ 30.3 $ 7.2
Deferred tax benefits from change in permanent status of foreign subsidiaries, resulting from current period   24.5 5.9
Deferred tax benefits from reinvestment of foreign earnings 5.0    
Uncertain tax positions, increase based on prior years’ tax positions 1.6 10.8 0.0
Temporary difference due to repatriation of assets from a sale or liquidation of the subsidiary 188.1    
Amount of deferred taxes not recognized $ 71.1    
State net operating loss carryforwards, expiration period 19 years    
Foreign operating loss carryforwards, expiration period 20 years    
Liability for uncertain tax positions including interest and related charges $ 26.9 28.8 20.4
Accrued income tax interest and related charges 1.8 1.6 1.7
Unrecognized tax benefits that, if recognized, would affect effective tax rate 25.3 26.4 17.2
Decrease in uncertain tax positions from changes in foreign exchange rates 1.9    
Foreign Tax Authority      
Operating Loss Carryforwards [Line Items]      
Deferred tax benefit due to re-valuation of deferred taxes from a change in enacted tax rates in the United Kingdom 10.0   11.2
Foreign Tax Authority | Non-Controlling Interests      
Operating Loss Carryforwards [Line Items]      
Deferred tax benefit due to re-valuation of deferred taxes from a change in enacted tax rates in the United Kingdom $ 6.5   $ 7.6
State Tax Authority      
Operating Loss Carryforwards [Line Items]      
Uncertain tax positions, increase based on prior years’ tax positions   $ 8.4