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Lines of Credit and Financing Arrangements (Foreign Obligations) (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Dec. 31, 2017
Short-term Debt [Line Items]      
Foreign obligations $ 0.9   $ 0.9
Foreign Obligations [Member]      
Short-term Debt [Line Items]      
Foreign obligations 0.9   $ 0.9
Proceeds on facilities 0.3 $ 0.3  
Repayments on facilities $ 0.4 $ 1.1