Transactions with PACCAR and Affiliates - Additional Information (Detail) $ in Millions	12 Months Ended
Dec. 31, 2023 USD ($) Facility	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Related Party Transaction [Line Items]
Required ratio of net earnings available for fixed charges to fixed charges	125.00%
Letter of credit issued	$ 0.9
Number of facilities leased by company \| Facility	5
Selling, general and administrative expenses	$ 64.5	$ 60.7	$ 57.3
Defined benefit pension plan expenses	3.1	4.9	4.3
Defined contribution plan expenses	2.0	1.9	1.9
Foreign Finance Affiliates
Related Party Transaction [Line Items]
Loans to foreign affiliates, upper limit	750.0
Related Party
Related Party Transaction [Line Items]
Selling, general and administrative expenses	$ 7.0	$ 8.6	$ 8.1

Fixed charge coverage ratio, minimum.

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- Definition

Number of facilities leased by company.

+ References

No definition available.

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- Definition

The maximum amount of loans to a foreign entity that is affiliated with the reporting entity by means of direct or indirect ownership.

+ References

No definition available.

+ Details

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- Definition

Amount of net periodic benefit cost (credit) for defined benefit plan.

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- Definition

Amount of cost for defined contribution plan.

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- Definition

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

+ References

No definition available.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

The aggregate total costs related to selling a firm's product and services, as well as all other general and administrative expenses. Direct selling expenses (for example, credit, warranty, and advertising) are expenses that can be directly linked to the sale of specific products. Indirect selling expenses are expenses that cannot be directly linked to the sale of specific products, for example telephone expenses, Internet, and postal charges. General and administrative expenses include salaries of non-sales personnel, rent, utilities, communication, etc.

+ References

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