Finance Receivables (Details 3) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Financing Receivable, Allowance for Credit Losses
Beginning Balance	$ 479	$ 424
Write-offs	(256)	(263)
Recoveries	51	41
Provision for credit losses	68	261
Other	(5)	4
Ending Balance	337	479
Finance Receivables	27,514	27,054
Adjustment to adopt new accounting guidance | Accounting Standards Update 2016-13
Financing Receivable, Allowance for Credit Losses
Beginning Balance	0	12
Ending Balance		0
Customer
Financing Receivable, Allowance for Credit Losses
Beginning Balance	431	375
Write-offs	(256)	(263)
Recoveries	51	41
Provision for credit losses	30	262
Other	(5)	4
Ending Balance	251	431
Finance Receivables	20,842	19,927
Customer | Adjustment to adopt new accounting guidance | Accounting Standards Update 2016-13
Financing Receivable, Allowance for Credit Losses
Beginning Balance	0	12
Ending Balance		0
Dealer
Financing Receivable, Allowance for Credit Losses
Beginning Balance	44	45
Write-offs	0	0
Recoveries	0	0
Provision for credit losses	38	(1)
Other	0	0
Ending Balance	82	44
Finance Receivables	2,210	3,481
Dealer | Adjustment to adopt new accounting guidance | Accounting Standards Update 2016-13
Financing Receivable, Allowance for Credit Losses
Beginning Balance	0	0
Ending Balance		0
Caterpillar Purchased Receivables
Financing Receivable, Allowance for Credit Losses
Beginning Balance	4	4
Write-offs	0	0
Recoveries	0	0
Provision for credit losses	0	0
Other	0	0
Ending Balance	4	4
Finance Receivables	4,462	3,646
Caterpillar Purchased Receivables | Adjustment to adopt new accounting guidance | Accounting Standards Update 2016-13
Financing Receivable, Allowance for Credit Losses
Beginning Balance	$ 0	0
Ending Balance		$ 0