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Lines of Credit and Financing Arrangements (Foreign Obligations) (Details) - USD ($)
$ in Millions
9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Dec. 31, 2016
Short-term Debt [Line Items]      
Foreign obligations $ 326.0   $ 52.4
Foreign Obligations [Member]      
Short-term Debt [Line Items]      
Foreign obligations 1.0   $ 2.4
Proceeds on facilities 19.1 $ 28.2  
Repayments on facilities $ 20.5 $ 30.3