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Fair Value of Debt (Detail) - USD ($)
$ in Millions
Jun. 30, 2020
Dec. 31, 2019
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Long-term debt [1] $ 2,567.0 $ 1,726.1
Short-term debt [1] 492.9 368.1
Long-term debt, fair value 2,608.7 1,799.7
Short-term debt, fair value 495.7 368.1
Commercial Paper    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Short-term debt [1] 26.8 230.7
Short-term debt, fair value 26.8 230.7
Bonds    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Long-term debt [1] 1,323.8 1,597.5
Long-term debt, fair value 1,363.8 1,671.1
Loans    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Long-term debt [1] 1,243.2 128.6
Long-term debt, fair value 1,244.9 128.6
Overdrafts and Other Short-Term Debt    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Short-term debt [1] 78.9 25.4
Short-term debt, fair value 78.9 25.3
Short-Term Portion of Long-Term Debt    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Short-term debt [1] 387.2 112.0
Short-term debt, fair value $ 390.0 $ 112.1
[1] Debt as reported in balance sheet.