Finance Receivables - Allowance for Credit Losses and Total Finance Receivables (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	$ 254	$ 320	$ 331	$ 346
Write-offs	(42)	(22)	(145)	(63)
Recoveries	15	13	45	36
Provision for credit losses	26	32	50	22
Other	2	(3)	(26)	(1)
Ending Balance	255	340	255	340
Total Finance Receivables	29,405	27,542	29,405	27,542	$ 28,077
Customer
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	246	265	276	277
Write-offs	(42)	(22)	(98)	(63)
Recoveries	15	13	45	36
Provision for credit losses	25	31	49	35
Other	2	(3)	(26)	(1)
Ending Balance	246	284	246	284
Total Finance Receivables	22,189	20,279	22,189	20,279	21,177
Dealer
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	4	50	51	65
Write-offs	0	0	(47)	0
Recoveries	0	0	0	0
Provision for credit losses	0	1	0	(14)
Other	0	0	0	0
Ending Balance	4	51	4	51
Total Finance Receivables	2,902	2,882	2,902	2,882
Caterpillar Purchased Receivables
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	4	5	4	4
Write-offs	0	0	0	0
Recoveries	0	0	0	0
Provision for credit losses	1	0	1	1
Other	0	0	0	0
Ending Balance	5	5	5	5
Total Finance Receivables	$ 4,314	$ 4,381	$ 4,314	$ 4,381	$ 3,949