Cat Financial Financing Activities - Allowance for credit losses in finance receivables (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Allowance for Credit Losses:
Beginning balance	$ 327	$ 342
Write-offs	(172)	(115)
Recoveries	57	50
Provision for credit losses	84	47
Other	(34)	3
Ending balance	262	327
Finance Receivables	23,029	22,449
Customer
Allowance for Credit Losses:
Beginning balance	276	277
Write-offs	(125)	(115)
Recoveries	57	50
Provision for credit losses	84	61
Other	(34)	3
Ending balance	258	276
Finance Receivables	21,517	20,571
Dealer
Allowance for Credit Losses:
Beginning balance	51	65
Write-offs	(47)	0
Recoveries	0	0
Provision for credit losses	0	(14)
Other	0	0
Ending balance	4	51
Finance Receivables	$ 1,512	$ 1,878