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Debt - Maturing within One Year (Details) - USD ($)
$ in Millions
Dec. 31, 2020
Dec. 31, 2019
Short-term Debt [Line Items]    
Short-term foreign debt $ 98.4 $ 144.9
Commercial paper 146.3 0.0
Total short-term debt 244.7 144.9
Current portion of long-term debt 93.6 82.8
Short-term debt and current portion of long-term debt $ 338.3 $ 227.7
Short-term Foreign Debt    
Short-term Debt [Line Items]    
Weighted average interest rates for short-term debt outstanding at year-end 13.20%  
Commercial Paper    
Short-term Debt [Line Items]    
Weighted average interest rates for short-term debt outstanding at year-end 0.50%