Segment Information (Tables)

9 Months Ended

Sep. 30, 2025

Segment Reporting [Abstract]

Segment Reporting Information by Segment

	Three Months Ended September 30, 2025
	Truck			Parts			Other			Truck, Parts and Other			Financial Services		Total
Net sales and revenues	$	4,455.9		$	1,741.9		$	.5		$	6,198.3		$	565.3	$	6,763.6
Less intersegment		(74.5	)		(17.3	)					(91.8	)				(91.8	)
External Customers	$	4,381.4		$	1,724.6		$	.5		$	6,106.5		$	565.3	$	6,671.8
Cost of sales and revenues		4,125.8			1,216.5			3.1			5,345.4					5,345.4
Research and development		79.6			31.4						111.0					111.0
Selling, general and administrative		63.3			66.5			10.5			140.3			39.9		180.2
Interest and other borrowing expenses														201.0		201.0
Depreciation and other expenses														161.7		161.7
Provision for losses on receivables														36.5		36.5
Other segment expenses (income)		10.2			.2			(27.2	)		(16.8	)				(16.8	)
	$	102.5		$	410.0		$	14.1		$	526.6		$	126.2	$	652.8
Investment income																90.8
Income before income taxes	$	102.5		$	410.0		$	14.1		$	526.6		$	126.2	$	743.6
Depreciation and amortization	$	89.6		$	4.3		$	6.0		$	99.9		$	105.9	$	205.8
Expenditures for long-lived assets	$	137.1		$	8.3		$	7.3		$	152.7		$	143.0	$	295.7

	Nine Months Ended September 30, 2025
	Truck			Parts			Other			Truck, Parts and Other			Financial Services		Total
Net sales and revenues	$	15,187.6		$	5,189.7		$	(2.7	)	$	20,374.6		$	1,641.0	$	22,015.6
Less intersegment		(337.3	)		(54.3	)					(391.6	)				(391.6	)
External Customers	$	14,850.3		$	5,135.4		$	(2.7	)	$	19,983.0		$	1,641.0	$	21,624.0
Cost of sales and revenues		13,630.1			3,592.7			9.0			17,231.8					17,231.8
Research and development		246.9			92.4						339.3					339.3
Selling, general and administrative		175.3			192.0			55.5			422.8			118.3		541.1
Interest and other borrowing expenses														591.9		591.9
Depreciation and other expenses														476.3		476.3
Provision for losses on receivables														84.0		84.0
Other segment expenses*		21.8			5.3			272.4			299.5					299.5
	$	776.2		$	1,253.0		$	(339.6	)	$	1,689.6		$	370.5	$	2,060.1
Investment income																258.5
Income (loss) before income taxes	$	776.2		$	1,253.0		$	(339.6	)	$	1,689.6		$	370.5	$	2,318.6
Depreciation and amortization	$	273.6		$	11.5		$	18.5		$	303.6		$	314.6	$	618.2
Expenditures for long-lived assets	$	512.6		$	14.7		$	27.3		$	554.6		$	461.6	$	1,016.2

* Other includes a $350.0 million charge in the first quarter of 2025 related to civil litigation in Europe (EC-related claims) which is discussed in Note M.

	Three Months Ended September 30, 2024
	Truck			Parts			Other			Truck, Parts and Other			Financial Services		Total
Net sales and revenues	$	6,110.8		$	1,675.8		$	19.2		$	7,805.8		$	536.1	$	8,341.9
Less intersegment		(83.8	)		(18.2	)					(102.0	)				(102.0	)
External Customers	$	6,027.0		$	1,657.6		$	19.2		$	7,703.8		$	536.1	$	8,239.9
Cost of sales and revenues		5,246.0			1,159.2			22.5			6,427.7					6,427.7
Research and development		87.5			27.4			.1			115.0					115.0
Selling, general and administrative		61.9			62.5			19.9			144.3			42.2		186.5
Interest and other borrowing expenses														188.4		188.4
Depreciation and other expenses														176.6		176.6
Provision for losses on receivables														22.4		22.4
Other segment expenses (income)		.8			1.8			(26.9	)		(24.3	)				(24.3	)
	$	630.8		$	406.7		$	3.6		$	1,041.1		$	106.5	$	1,147.6
Investment income																108.7
Income before income taxes	$	630.8		$	406.7		$	3.6		$	1,041.1		$	106.5	$	1,256.3
Depreciation and amortization	$	90.7		$	2.2		$	6.1		$	99.0		$	127.8	$	226.8
Expenditures for long-lived assets	$	156.7		$	14.7		$	9.3		$	180.7		$	187.5	$	368.2

	Nine Months Ended September 30, 2024
	Truck			Parts			Other			Truck, Parts and Other			Financial Services		Total
Net sales and revenues	$	19,464.0		$	5,056.2		$	57.5		$	24,577.7		$	1,555.2	$	26,132.9
Less intersegment		(318.2	)		(58.4	)					(376.6	)				(376.6	)
External Customers	$	19,145.8		$	4,997.8		$	57.5		$	24,201.1		$	1,555.2	$	25,756.3
Cost of sales and revenues		16,356.6			3,450.7			66.5			19,873.8					19,873.8
Research and development		255.4			81.7			.5			337.6					337.6
Selling, general and administrative		183.3			186.4			64.9			434.6			122.0		556.6
Interest and other borrowing expenses														520.9		520.9
Depreciation and other expenses														530.5		530.5
Provision for losses on receivables														50.2		50.2
Other segment expenses (income)		.8			2.7			(78.4	)		(74.9	)				(74.9	)
	$	2,349.7		$	1,276.3		$	4.0		$	3,630.0		$	331.6	$	3,961.6
Investment income																290.0
Income before income taxes	$	2,349.7		$	1,276.3		$	4.0		$	3,630.0		$	331.6	$	4,251.6
Depreciation and amortization	$	283.7		$	10.9		$	18.6		$	313.2		$	380.5	$	693.7
Expenditures for long-lived assets	$	508.0		$	36.7		$	32.9		$	577.6		$	627.5	$	1,205.1

	September 30		December 31
Business Segment Data	2025		2024
Segment Assets:
Truck	$	8,096.1	$	7,563.3
Parts		2,312.7		2,097.0
Other		1,703.3		1,697.2
Cash and marketable securities		9,068.6		9,649.9
		21,180.7		21,007.4
Financial services		23,020.5		22,411.5
	$	44,201.2	$	43,418.9