Finance Receivables (Details 3) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Financing Receivable, Allowance for Credit Losses
Beginning Balance	$ 357	$ 441	$ 337	$ 479
Write-offs	(18)	(68)	(38)	(102)
Recoveries	18	14	30	24
Provision for credit losses(1)(2)	22	13	48	3
Other	(3)	2	(1)	(2)
Ending Balance	376	402	376	402
Finance Receivables	26,739	27,538	26,739	27,538	$ 27,514
Customer
Financing Receivable, Allowance for Credit Losses
Beginning Balance	271	393	251	431
Write-offs	(18)	(68)	(38)	(102)
Recoveries	18	14	30	24
Provision for credit losses(1)(2)	22	13	48	3
Other	(3)	2	(1)	(2)
Ending Balance	290	354	290	354
Finance Receivables	20,483	20,563	20,483	20,563	20,842
Dealer
Financing Receivable, Allowance for Credit Losses
Beginning Balance	81	44	82	44
Write-offs	0	0	0	0
Recoveries	0	0	0	0
Provision for credit losses(1)(2)	1	0	0	0
Other	0	0	0	0
Ending Balance	82	44	82	44
Finance Receivables	2,277	3,117	2,277	3,117
Caterpillar Purchased Receivables
Financing Receivable, Allowance for Credit Losses
Beginning Balance	5	4	4	4
Write-offs	0	0	0	0
Recoveries	0	0	0	0
Provision for credit losses(1)(2)	(1)	0	0	0
Other	0	0	0	0
Ending Balance	4	4	4	4
Finance Receivables	$ 3,979	$ 3,858	$ 3,979	$ 3,858	$ 4,462