Finance Receivables - Allowance for Credit Losses and Total Finance Receivables (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025	Dec. 31, 2025
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	$ 283	$ 282	$ 284	$ 267
Write-offs	(46)	(27)	(88)	(57)
Recoveries	26	9	39	19
Provision for credit losses	31	21	59	54
Other	0	5	0	7
Ending Balance	294	290	294	290
Total Finance Receivables	35,098	30,896	35,098	30,896	$ 33,099
Customer
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	273	273	273	258
Write-offs	(46)	(27)	(88)	(57)
Recoveries	26	9	39	19
Provision for credit losses	29	21	58	54
Other	0	5	0	7
Ending Balance	282	281	282	281
Total Finance Receivables	24,829	23,629	24,829	23,629	24,572
Dealer
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	4	4	4	4
Write-offs	0	0	0	0
Recoveries	0	0	0	0
Provision for credit losses	0	0	0	0
Other	0	0	0	0
Ending Balance	4	4	4	4
Total Finance Receivables	3,552	2,685	3,552	2,685
Caterpillar Purchased Receivables
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	6	5	7	5
Write-offs	0	0	0	0
Recoveries	0	0	0	0
Provision for credit losses	2	0	1	0
Other	0	0	0	0
Ending Balance	8	5	8	5
Total Finance Receivables	$ 6,717	$ 4,582	$ 6,717	$ 4,582	$ 5,500