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Debt - Maturing within One Year (Details) - USD ($)
$ in Millions
Jun. 30, 2017
Dec. 31, 2016
Short-term Debt [Line Items]    
Short-term foreign debt $ 91.3 $ 85.5
Commercial paper 0.0 6.3
Total short-term debt 91.3 91.8
Current portion of long-term debt 101.2 2.4
Short-term debt and current portion of long-term debt $ 192.5 $ 94.2
Short-term Debt    
Short-term Debt [Line Items]    
Interest rate percentage 8.30%