Finance Receivables - Allowance for credit losses and total finance receivables (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Financing Receivable, Allowance for Credit Losses
Beginning Balance	$ 267	$ 331
Write-offs	(148)	(172)
Recoveries	47	57
Provision for credit losses	111	85
Other	7	(34)
Ending Balance	284	267
Finance Receivables	33,099	29,231
Customer
Financing Receivable, Allowance for Credit Losses
Beginning Balance	258	276
Write-offs	(148)	(125)
Recoveries	47	57
Provision for credit losses	109	84
Other	7	(34)
Ending Balance	273	258
Finance Receivables	24,572	22,199
Dealer
Financing Receivable, Allowance for Credit Losses
Beginning Balance	4	51
Write-offs	0	(47)
Recoveries	0	0
Provision for credit losses	0	0
Other	0	0
Ending Balance	4	4
Finance Receivables	3,027	2,749
Caterpillar Purchased Receivables
Financing Receivable, Allowance for Credit Losses
Beginning Balance	5	4
Write-offs	0	0
Recoveries	0	0
Provision for credit losses	2	1
Other	0	0
Ending Balance	7	5
Finance Receivables	$ 5,500	$ 4,283