Finance Receivables (Details 5) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022	Sep. 30, 2022
Receivables [Abstract]
Period after which unpaid installments are considered as past due	30 days
Financing Receivable, Past Due
Total Finance Receivables	$ 27,542	$ 26,787	$ 26,111
Caterpillar Purchased Receivables
Financing Receivable, Past Due
Total Finance Receivables	4,381	4,297	$ 3,962
Caterpillar Purchased Receivables | 31-60 days past due
Financing Receivable, Past Due
Total Finance Receivables	30	28
Caterpillar Purchased Receivables | 61-90 days past due
Financing Receivable, Past Due
Total Finance Receivables	11	11
Caterpillar Purchased Receivables | 91+ days past due
Financing Receivable, Past Due
Total Finance Receivables	28	22
Caterpillar Purchased Receivables | Total Past Due
Financing Receivable, Past Due
Total Finance Receivables	69	61
Caterpillar Purchased Receivables | Current
Financing Receivable, Past Due
Total Finance Receivables	4,312	4,236
Caterpillar Purchased Receivables | North America
Financing Receivable, Past Due
Total Finance Receivables	2,651	2,480
Caterpillar Purchased Receivables | North America | 31-60 days past due
Financing Receivable, Past Due
Total Finance Receivables	15	11
Caterpillar Purchased Receivables | North America | 61-90 days past due
Financing Receivable, Past Due
Total Finance Receivables	5	7
Caterpillar Purchased Receivables | North America | 91+ days past due
Financing Receivable, Past Due
Total Finance Receivables	2	4
Caterpillar Purchased Receivables | North America | Total Past Due
Financing Receivable, Past Due
Total Finance Receivables	22	22
Caterpillar Purchased Receivables | North America | Current
Financing Receivable, Past Due
Total Finance Receivables	2,629	2,458
Caterpillar Purchased Receivables | EAME
Financing Receivable, Past Due
Total Finance Receivables	761	815
Caterpillar Purchased Receivables | EAME | 31-60 days past due
Financing Receivable, Past Due
Total Finance Receivables	1	1
Caterpillar Purchased Receivables | EAME | 61-90 days past due
Financing Receivable, Past Due
Total Finance Receivables	1	0
Caterpillar Purchased Receivables | EAME | 91+ days past due
Financing Receivable, Past Due
Total Finance Receivables	1	2
Caterpillar Purchased Receivables | EAME | Total Past Due
Financing Receivable, Past Due
Total Finance Receivables	3	3
Caterpillar Purchased Receivables | EAME | Current
Financing Receivable, Past Due
Total Finance Receivables	758	812
Caterpillar Purchased Receivables | Asia/Pacific
Financing Receivable, Past Due
Total Finance Receivables	574	565
Caterpillar Purchased Receivables | Asia/Pacific | 31-60 days past due
Financing Receivable, Past Due
Total Finance Receivables	8	6
Caterpillar Purchased Receivables | Asia/Pacific | 61-90 days past due
Financing Receivable, Past Due
Total Finance Receivables	0	2
Caterpillar Purchased Receivables | Asia/Pacific | 91+ days past due
Financing Receivable, Past Due
Total Finance Receivables	1	2
Caterpillar Purchased Receivables | Asia/Pacific | Total Past Due
Financing Receivable, Past Due
Total Finance Receivables	9	10
Caterpillar Purchased Receivables | Asia/Pacific | Current
Financing Receivable, Past Due
Total Finance Receivables	565	555
Caterpillar Purchased Receivables | Latin America
Financing Receivable, Past Due
Total Finance Receivables	384	431
Caterpillar Purchased Receivables | Latin America | 31-60 days past due
Financing Receivable, Past Due
Total Finance Receivables	4	9
Caterpillar Purchased Receivables | Latin America | 61-90 days past due
Financing Receivable, Past Due
Total Finance Receivables	4	2
Caterpillar Purchased Receivables | Latin America | 91+ days past due
Financing Receivable, Past Due
Total Finance Receivables	23	14
Caterpillar Purchased Receivables | Latin America | Total Past Due
Financing Receivable, Past Due
Total Finance Receivables	31	25
Caterpillar Purchased Receivables | Latin America | Current
Financing Receivable, Past Due
Total Finance Receivables	353	406
Caterpillar Purchased Receivables | Power
Financing Receivable, Past Due
Total Finance Receivables	11	6
Caterpillar Purchased Receivables | Power | 31-60 days past due
Financing Receivable, Past Due
Total Finance Receivables	2	1
Caterpillar Purchased Receivables | Power | 61-90 days past due
Financing Receivable, Past Due
Total Finance Receivables	1	0
Caterpillar Purchased Receivables | Power | 91+ days past due
Financing Receivable, Past Due
Total Finance Receivables	1	0
Caterpillar Purchased Receivables | Power | Total Past Due
Financing Receivable, Past Due
Total Finance Receivables	4	1
Caterpillar Purchased Receivables | Power | Current
Financing Receivable, Past Due
Total Finance Receivables	$ 7	$ 5