v3.26.1
Allowance for Credit Losses (Detail) - USD ($)
$ in Millions
 3 Months Ended 12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Dec. 31, 2025
Financing Receivable, Allowance for Credit Losses [Line Items]      
Beginning Balance $ 83.8 $ 74.4 $ 74.4
Provision for losses 14.2 5.5  
Charge-offs (16.0) (11.7)  
Recoveries 0.5 0.2  
Ending Balance 82.5 68.4 83.8
Dealer | Wholesale      
Financing Receivable, Allowance for Credit Losses [Line Items]      
Beginning Balance 1.1 1.1 1.1
Ending Balance 1.1 1.1 1.1
Dealer | Retail      
Financing Receivable, Allowance for Credit Losses [Line Items]      
Beginning Balance 1.5 1.1 1.1
Ending Balance 1.5 1.1 1.5
Customer Retail      
Financing Receivable, Allowance for Credit Losses [Line Items]      
Beginning Balance 80.7 70.7 70.7
Provision for losses 14.0 5.5  
Charge-offs (15.7) (11.7)  
Recoveries 0.5 0.2  
Ending Balance 79.5 64.7 80.7
Other      
Financing Receivable, Allowance for Credit Losses [Line Items]      
Beginning Balance [1] 0.5 1.5 1.5
Provision for losses 0.2    
Charge-offs (0.3)    
Ending Balance [1] $ 0.4 $ 1.5 $ 0.5
[1] Operating lease and other trade receivables.