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Financing Receivables by Aging Category (Detail) - Financial Services - USD ($) $ in Millions | Mar. 31, 2025 | Dec. 31, 2024
--- | --- | ---
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Finance Receivable | $ 19,578.0 | $ 19,293.1
Current and up to 30 days past due |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Finance Receivable | 19,404.6 | 19,098.9
31 - 60 days past due |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Finance Receivable | 51.4 | 80.8
Greater than 60 days past due |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Finance Receivable | 122.0 | 113.4
Dealer |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Finance Receivable | 7,327.1 | 7,371.5
Dealer | Wholesale |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Finance Receivable | 4,947.3 | 4,944.1
Dealer | Retail |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Finance Receivable | 2,379.8 | 2,427.4
Dealer | Current and up to 30 days past due | Wholesale |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Finance Receivable | 4,947.3 | 4,942.1
Dealer | Current and up to 30 days past due | Retail |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Finance Receivable | 2,379.8 | 2,427.4
Dealer | 31 - 60 days past due | Wholesale |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Finance Receivable |  | 1.1
Dealer | Greater than 60 days past due | Wholesale |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Finance Receivable |  | 0.9
Customer Retail |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Finance Receivable | 12,250.9 | 11,921.6
Customer Retail | Fleet |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Finance Receivable | 10,924.3 | 10,638.1
Customer Retail | Owner/Operator |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Finance Receivable | 1,326.6 | 1,283.5
Customer Retail | Current and up to 30 days past due | Fleet |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Finance Receivable | 10,772.9 | 10,462.5
Customer Retail | Current and up to 30 days past due | Owner/Operator |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Finance Receivable | 1,304.6 | 1,266.9
Customer Retail | 31 - 60 days past due | Fleet |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Finance Receivable | 38.6 | 71.8
Customer Retail | 31 - 60 days past due | Owner/Operator |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Finance Receivable | 12.8 | 7.9
Customer Retail | Greater than 60 days past due | Fleet |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Finance Receivable | 112.8 | 103.8
Customer Retail | Greater than 60 days past due | Owner/Operator |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Finance Receivable | $ 9.2 | $ 8.7

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