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Debt - Maturing within One Year (Details) - USD ($)
$ in Millions
Sep. 30, 2021
Dec. 31, 2020
Short-term Debt [Line Items]    
Total short-term debt $ 375.4 $ 244.7
Current portion of long-term debt 386.6 93.6
Total short-term debt and current portion of long-term debt 762.0 338.3
Revolving Credit Facility | Line of Credit    
Short-term Debt [Line Items]    
Line of credit, maximum increase 2,250.0  
Short-term foreign debt    
Short-term Debt [Line Items]    
Total short-term debt $ 107.9 98.4
Average effective interest rate 12.20%  
Commercial paper    
Short-term Debt [Line Items]    
Total short-term debt $ 267.5 $ 146.3
Average effective interest rate 0.45%