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Debt - Maturing within One Year (Details) - USD ($)
Sep. 30, 2020
Dec. 31, 2019
Short-term Debt [Line Items]    
Short-term debt $ 116,200,000 $ 144,900,000
Current portion of long-term debt 77,900,000 82,800,000
Total short-term debt and current portion of long-term debt 194,100,000 227,700,000
Short-term foreign debt    
Short-term Debt [Line Items]    
Short-term debt $ 116,200,000 144,900,000
Average effective interest rate 12.80%  
Commercial paper    
Short-term Debt [Line Items]    
Short-term debt $ 0 $ 0