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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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