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Financial Services Borrowings (Detail) - Financial Services - USD ($)
$ in Millions
Dec. 31, 2020
Dec. 31, 2019
Debt Instrument [Line Items]    
Effective Rate 1.40% 1.90%
Commercial paper $ 3,113.5 $ 3,797.2
Bank loans 230.9 313.0
Commercial paper and bank loans 3,344.4 4,110.2
Term notes 7,508.9 7,112.5
Commercial Paper, Bank Loans, and Term Debt at Carrying Value, Total $ 10,853.3 $ 11,222.7
Commercial Paper    
Debt Instrument [Line Items]    
Effective Rate 0.40% 1.50%
Bank Loans    
Debt Instrument [Line Items]    
Effective Rate 5.90% 7.10%
Term Loan    
Debt Instrument [Line Items]    
Effective Rate 1.70% 1.90%