Consolidated Statements of Income - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Revenues	$ 33,663.8	$ 35,127.4	$ 28,819.7
Cost of sales and revenues	26,069.6	26,894.2	23,291.0
Research and development	452.9	410.9	341.2
Interest and other borrowing expenses	710.8	500.6	216.3
Depreciation and other expenses	718.5	590.7	560.8
Selling, general and administrative	744.0	753.3	726.3
Provision for losses on receivables	75.6	31.3	5.5
Income before income taxes	5,006.2	5,426.0	3,787.7
Investment income	394.7	292.2	61.0
Total Income Before Income Taxes	5,400.9	5,718.2	3,848.7
Income taxes	1,238.9	1,117.4	837.1
Net Income	$ 4,162.0	$ 4,600.8	$ 3,011.6
Net Income Per Share
Basic	$ 7.92	$ 8.78	$ 5.76
Diluted	$ 7.9	$ 8.76	$ 5.75
Weighted Average Number of Common Shares Outstanding
Basic	525.3	523.9	522.6
Diluted	526.6	525.0	523.4
Truck, Parts and Other
Revenues	$ 31,564.3	$ 33,315.5	$ 27,314.3
Cost of sales and revenues	26,069.6	26,894.2	23,291.0
Research and development	452.9	410.9	341.2
Selling, general and administrative	585.0	604.3	592.4
Interest and other (income) expenses, net	(113.8)	520.4	(109.1)
Costs and Expenses, Total	26,993.7	28,429.8	24,115.5
Income before income taxes	4,570.6	4,885.7	3,198.8
Total Income Before Income Taxes	4,570.6	4,885.7	3,198.8
Financial Services
Interest and fees	1,295.9	1,009.3	628.7
Operating lease, rental and other revenues	803.6	802.6	876.7
Revenues	2,099.5	1,811.9	1,505.4
Interest and other borrowing expenses	710.8	500.6	216.3
Depreciation and other expenses	718.5	590.7	560.8
Selling, general and administrative	159.0	149.0	133.9
Provision for losses on receivables	75.6	31.3	5.5
Costs and Expenses, Total	1,663.9	1,271.6	916.5
Income before income taxes	435.6	540.3	588.9
Total Income Before Income Taxes	$ 435.6	$ 540.3	$ 588.9