Finance and Other Receivables - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended	9 Months Ended		12 Months Ended
	Sep. 30, 2023	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accrued interest receivable	$ 73.6	$ 73.6		$ 44.1
Loans accounted for as troubled debt restructurings			$ 34.2	31.1
Repossessed inventory	$ 17.2	17.2		$ 9.2
Proceeds from the sales of repossessed assets		$ 17.7	$ 16.1
ASU 2022-02
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable modifications weighted average term extension	5 months	19 months
Change in accounting principle, accounting standards update, adopted [true false]	true	true
Change in accounting principle, accounting standards update adoption date	Jan. 01, 2023	Jan. 01, 2023
Customer Retail | ASU 2022-02
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable modifications percentage	0.00%	0.10%
Customer Retail | ASU 2022-02 | Fleet
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized cost basis of finance receivables	$ 0.6	$ 7.2
Customer Retail | ASU 2022-02 | Owner/Operator
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized cost basis of finance receivables	0.0	$ 0.0
Financial Services
Accounts, Notes, Loans and Financing Receivable [Line Items]
Months contractual terms extended		4 months		3 months
Amortized cost basis of finance receivables	61.3	$ 61.3		$ 54.4
Financial Services | Customer Retail | Fleet
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized cost basis of finance receivables	54.6	54.6		50.1
Financial Services | Customer Retail | Owner/Operator
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized cost basis of finance receivables	$ 6.7	$ 6.7		$ 3.6
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%