Stockholders' Equity (Tables)

12 Months Ended

Dec. 31, 2024

Equity [Abstract]

Changes in Accumulated Other Comprehensive Income (loss) by Component

Accumulated Other Comprehensive Income (Loss): The components of AOCI and the changes in AOCI, net of tax, included in the Consolidated Balance Sheets and the Consolidated Statements of Stockholders’ Equity, consisted of the following:

	DERIVATIVE CONTRACTS			MARKETABLE DEBT SECURITIES			PENSION PLANS			FOREIGN CURRENCY TRANSLATION			TOTAL
Balance at January 1, 2024	$	(11.0	)	$	(13.9	)	$	(110.3	)	$	(558.7	)	$	(693.9	)
Recorded into AOCI		204.2			15.5			173.1			(656.1	)		(263.3	)
Reclassified out of AOCI		(160.7	)		(2.3	)		6.9						(156.1	)
Net other comprehensive income (loss)		43.5			13.2			180.0			(656.1	)		(419.4	)
Balance at December 31, 2024	$	32.5		$	(.7	)	$	69.7		$	(1,214.8	)	$	(1,113.3	)

	DERIVATIVE CONTRACTS			MARKETABLE DEBT SECURITIES			PENSION PLANS			FOREIGN CURRENCY TRANSLATION			TOTAL
Balance at January 1, 2023	$	35.1		$	(43.6	)	$	(110.9	)	$	(834.0	)	$	(953.4	)
Recorded into AOCI		(137.9	)		32.4			(4.0	)		275.3			165.8
Reclassified out of AOCI		91.8			(2.7	)		4.6						93.7
Net other comprehensive (loss) income		(46.1	)		29.7			.6			275.3			259.5
Balance at December 31, 2023	$	(11.0	)	$	(13.9	)	$	(110.3	)	$	(558.7	)	$	(693.9	)

	DERIVATIVE CONTRACTS			MARKETABLE DEBT SECURITIES			PENSION PLANS			FOREIGN CURRENCY TRANSLATION			TOTAL
Balance at January 1, 2022	$	(13.5	)	$	(1.1	)	$	(269.8	)	$	(636.7	)	$	(921.1	)
Recorded into AOCI		8.6			(41.3	)		136.4			(197.3	)		(93.6	)
Reclassified out of AOCI		40.0			(1.2	)		22.5						61.3
Net other comprehensive income (loss)		48.6			(42.5	)		158.9			(197.3	)		(32.3	)
Balance at December 31, 2022	$	35.1		$	(43.6	)	$	(110.9	)	$	(834.0	)	$	(953.4	)

Reclassifications Out of Accumulated Other Comprehensive Income

Reclassifications out of AOCI during the years ended December 31, 2024, 2023 and 2022 were as follows:

	LINE ITEM IN THE CONSOLIDATED	AMOUNT RECLASSIFIED OUT OF AOCI
AOCI COMPONENTS	STATEMENTS OF INCOME		2024			2023			2022
Unrealized (gains) losses on derivative contracts:
Truck, Parts and Other
Foreign-exchange contracts	Net sales and revenues	$	(12.1	)	$	31.9		$	19.3
	Cost of sales and revenues		(28.8	)		2.2			(15.3	)
	Interest and other (income) expenses, net		(15.6	)		(.9	)		(1.4	)
Commodity contracts	Cost of sales and revenues		13.1			4.2			32.0
Financial Services
Foreign-exchange contracts	Interest and other borrowing expenses		(7.3	)		(2.1	)		7.3
Interest-rate contracts	Interest and other borrowing expenses		(149.5	)		76.5			6.1
	Pre-tax expense (reduction) increase		(200.2	)		111.8			48.0
	Tax expense (benefit)		39.5			(20.0	)		(8.0	)
	After-tax expense (reduction) increase		(160.7	)		91.8			40.0
Unrealized gains on marketable debt securities:
Marketable debt securities	Investment income		(3.0	)		(3.6	)		(1.6	)
	Tax expense		.7			.9			.4
	After-tax income increase		(2.3	)		(2.7	)		(1.2	)
Pension plans:
Truck, Parts and Other
Actuarial loss	Interest and other (income) expenses, net		7.2			4.7			28.9
Prior service costs	Interest and other (income) expenses, net		1.4			1.4			.7
	Pre-tax expense increase		8.6			6.1			29.6
	Tax benefit		(1.7	)		(1.5	)		(7.1	)
	After-tax expense increase		6.9			4.6			22.5
Total reclassifications out of AOCI		$	(156.1	)	$	93.7		$	61.3