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Income Taxes, Tax Liability and Uncertainties (Details)
$ in Millions
Dec. 31, 2016
USD ($)
country
city
state
Dec. 31, 2015
USD ($)
Income Tax Disclosure [Abstract]    
Liability for Uncertain Tax Positions, Noncurrent $ 24.3  
Income tax liability [Abstract]    
Net current liability for income tax 40.7 $ 2.3
Current receivable 121.1 90.4
Current payable $ 80.4 $ 88.1
Income tax uncertainties [Abstract]    
Number of states where company or one of its subsidiaries files income tax returns | state 47  
Number of cities where company or one of its subsidiaries files income tax returns | city 25  
Number of other countries the company or one of its subsidiaries files income tax returns | country 80