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Balance Sheet Classifications, Fair Value, Gross and Pro Forma Net Amounts of Derivative Financial Instruments (Detail) - USD ($) $ in Millions | Sep. 30, 2025 | Dec. 31, 2024
--- | --- | ---
ASSETS |  |
Derivative assets | $ 58.7 | $ 207.0
Pro forma net amount | $ 38.4 | $ 194.7
Derivative Asset, Statement of Financial Position [Extensible Enumeration] | Assets | Assets
LIABILITIES |  |
Derivative liabilities | $ 214.8 | $ 46.7
Pro forma net amount | $ 194.5 | $ 34.4
Derivative Liability, Statement of Financial Position [Extensible Enumeration] | Liabilities | Liabilities
Interest-Rate Contracts | Financial Services |  |
ASSETS |  |
Less amounts not offset in financial instruments | $ (20.0) | $ (11.4)
LIABILITIES |  |
Less amounts not offset in financial instruments | (20.0) | (11.4)
Foreign-exchange contracts | Truck, Parts and Other |  |
ASSETS |  |
Less amounts not offset in financial instruments | (0.3) | (0.9)
LIABILITIES |  |
Less amounts not offset in financial instruments | (0.3) | (0.9)
Designated under hedge accounting |  |
ASSETS |  |
Derivative assets | 58.4 | 205.6
LIABILITIES |  |
Derivative liabilities | 213.6 | 44.1
Designated under hedge accounting | Interest-Rate Contracts | Financial Services | Other Assets |  |
ASSETS |  |
Derivative assets | 44.9 | 132.2
Designated under hedge accounting | Interest-Rate Contracts | Financial Services | Deferred Taxes and Other Liabilities |  |
LIABILITIES |  |
Derivative liabilities | 118.5 | 41.1
Designated under hedge accounting | Foreign-exchange contracts | Financial Services | Other Assets |  |
ASSETS |  |
Derivative assets |  | 5.8
Designated under hedge accounting | Foreign-exchange contracts | Financial Services | Deferred Taxes and Other Liabilities |  |
LIABILITIES |  |
Derivative liabilities | 5.2 |
Designated under hedge accounting | Foreign-exchange contracts | Truck, Parts and Other | Other current assets |  |
ASSETS |  |
Derivative assets | 13.5 | 67.6
Designated under hedge accounting | Foreign-exchange contracts | Truck, Parts and Other | Accounts payable, accrued expenses and other |  |
LIABILITIES |  |
Derivative liabilities | 89.4 | 3.0
Designated under hedge accounting | Commodity contracts | Truck, Parts and Other | Accounts payable, accrued expenses and other |  |
LIABILITIES |  |
Derivative liabilities | 0.5 |
Not designated as hedging instruments |  |
ASSETS |  |
Derivative assets | 0.3 | 1.4
LIABILITIES |  |
Derivative liabilities | 1.2 | 2.6
Not designated as hedging instruments | Foreign-exchange contracts | Financial Services | Other Assets |  |
ASSETS |  |
Derivative assets | 0.1 | 0.2
Not designated as hedging instruments | Foreign-exchange contracts | Financial Services | Deferred Taxes and Other Liabilities |  |
LIABILITIES |  |
Derivative liabilities |  | 0.2
Not designated as hedging instruments | Foreign-exchange contracts | Truck, Parts and Other | Other current assets |  |
ASSETS |  |
Derivative assets | 0.2 | 1.2
Not designated as hedging instruments | Foreign-exchange contracts | Truck, Parts and Other | Accounts payable, accrued expenses and other |  |
LIABILITIES |  |
Derivative liabilities | $ 1.2 | $ 2.4

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