Consolidated Statements of Income - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Revenues	$ 35,127.4	$ 28,819.7	$ 23,522.3
Provision for losses on receivables	31.3	5.5	0.5
Investment income	292.2	61.0	15.5
Total Income Before Income Taxes	5,718.2	3,848.7	2,396.3
Income taxes	1,117.4	837.1	530.8
Net Income	$ 4,600.8	$ 3,011.6	$ 1,865.5
Net Income Per Share
Basic	$ 8.78	$ 5.76	$ 3.58
Diluted	$ 8.76	$ 5.75	$ 3.57
Weighted Average Number of Common Shares Outstanding
Basic	523.9	522.6	521.7
Diluted	525.0	523.4	522.7
Truck, Parts and Other
Revenues	$ 33,315.5	$ 27,314.3	$ 21,834.5
Cost of sales and revenues	26,894.2	23,291.0	19,092.4
Research and development	410.9	341.2	324.1
Selling, general and administrative	604.3	592.4	547.4
Interest and other expenses (income), net	520.4	(109.1)	(72.6)
Costs and Expenses, Total	28,429.8	24,115.5	19,891.3
Income before income taxes	4,885.7	3,198.8	1,943.2
Financial Services
Interest and fees	1,009.3	628.7	524.4
Operating lease, rental and other revenues	802.6	876.7	1,163.4
Revenues	1,811.9	1,505.4	1,687.8
Interest and other borrowing expenses	500.6	216.3	150.9
Depreciation and other expenses	590.7	560.8	969.4
Selling, general and administrative	149.0	133.9	129.4
Provision for losses on receivables	31.3	5.5	0.5
Costs and Expenses, Total	1,271.6	916.5	1,250.2
Income before income taxes	$ 540.3	$ 588.9	$ 437.6