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Amortized Cost Basis of Finance Receivables Modified by Portfolio Class (Detail) - Customer Retail - USD ($) $ in Millions | 3 Months Ended
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Mar. 31, 2025 | Mar. 31, 2024
Financing Receivable, Modified [Line Items] |  |
Amortized cost basis of finance receivables | $ 11.7 | $ 5.2
Financing receivable modifications percentage | 0.30% | 0.20%
Fleet |  |
Financing Receivable, Modified [Line Items] |  |
Amortized cost basis of finance receivables | $ 11.6 | $ 5.1
Owner/Operator |  |
Financing Receivable, Modified [Line Items] |  |
Amortized cost basis of finance receivables | $ 0.1 | $ 0.1

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