v3.26.1
Allowance for Credit Losses (Detail) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Financing Receivable, Allowance for Credit Losses [Line Items]          
Beginning Balance     $ 83.8 $ 74.4 $ 74.4
Provision for losses $ 9.9 $ 12.7 24.1 18.2  
Charge-offs     (26.8) (27.8)  
Recoveries     1.0 0.3  
Ending Balance 82.1 65.1 82.1 65.1 83.8
Dealer | Wholesale          
Financing Receivable, Allowance for Credit Losses [Line Items]          
Beginning Balance     1.1 1.1 1.1
Provision for losses     (0.1)    
Ending Balance 1.0 1.1 1.0 1.1 1.1
Dealer | Retail          
Financing Receivable, Allowance for Credit Losses [Line Items]          
Beginning Balance     1.5 1.1 1.1
Provision for losses       0.3  
Ending Balance 1.5 1.4 1.5 1.4 1.5
Customer Retail          
Financing Receivable, Allowance for Credit Losses [Line Items]          
Beginning Balance     80.7 70.7 70.7
Provision for losses     24.1 18.7  
Charge-offs     (26.5) (27.8)  
Recoveries     1.0 0.3  
Ending Balance 79.3 61.9 79.3 61.9 80.7
Other          
Financing Receivable, Allowance for Credit Losses [Line Items]          
Beginning Balance [1]     0.5 1.5 1.5
Provision for losses [1]     0.1 (0.8)  
Charge-offs [1]     (0.3)    
Ending Balance [1] $ 0.3 $ 0.7 $ 0.3 $ 0.7 $ 0.5
[1] Operating lease and other trade receivables.