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Debt, Factoring and Customer Financing Arrangements - Lines of Credit and Other Debt Facilities (Details) - USD ($)
$ in Millions
6 Months Ended 12 Months Ended
Jun. 30, 2017
Dec. 31, 2016
Debt Instrument [Line Items]    
Debt and capital lease obligations $ 5,459.9 $ 5,239.0
Line of Credit    
Debt Instrument [Line Items]    
Debt and capital lease obligations 49.7 86.0
Outstanding letters of credit 29.6 32.6
Reduction in borrowings 19.0 11.8
Line of Credit | Lines of Credit and Revolving Lines of Credit    
Debt Instrument [Line Items]    
Debt and capital lease obligations 155.0 86.0
Remaining borrowing capacity $ 473.0 $ 561.0