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Finance and Other Receivables - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2024
Accounts, Notes, Loans and Financing Receivable [Line Items]
Finance receivable modified with customers financial difficulty			$ 250.1	$ 189.0
TDRs subsequently defaulted, amount	$ 85.5	$ 0.1	87.7	3.4
Repossessed inventory	$ 63.4		63.4		$ 80.9
Proceeds from the sales of repossessed assets			$ 99.5	$ 56.5
ASU 2022-02
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable modifications weighted average term extension	6 months	9 months	6 months	7 months
Customer Retail
Accounts, Notes, Loans and Financing Receivable [Line Items]
Finance receivable modified with customers financial difficulty	$ 91.2	$ 7.8	$ 132.1	$ 106.8
Customer Retail | Fleet
Accounts, Notes, Loans and Financing Receivable [Line Items]
Finance receivable modified with customers financial difficulty	87.1	$ 7.8	127.7	106.4
Customer Retail | Owner/Operator
Accounts, Notes, Loans and Financing Receivable [Line Items]
Finance receivable modified with customers financial difficulty	$ 4.1		$ 4.4	$ 0.4
Financial Services
Accounts, Notes, Loans and Financing Receivable [Line Items]
Months contractual terms extended			4 months		4 months
Financial Services | Loans and Leases | Minimum
Accounts, Notes, Loans and Financing Receivable [Line Items]
Contractual terms of retails loans and finance leases			3 years
Financial Services | Loans and Leases | Maximum
Accounts, Notes, Loans and Financing Receivable [Line Items]
Contractual terms of retails loans and finance leases			5 years
Financial Services | Financing Receivable | Maximum | Revenue Benchmark | Customer Concentration Risk
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of portfolio assets			5.00%

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