Finance Receivables - Aging Related to Finance Receivables (Details) - USD ($) $ in Millions	Mar. 31, 2025	Dec. 31, 2024	Mar. 31, 2024
Financing Receivable, Past Due
Total Finance Receivables	$ 29,682	$ 29,231	$ 27,934
Caterpillar Purchased Receivables
Financing Receivable, Past Due
Total Finance Receivables	4,477	4,283	$ 4,195
Caterpillar Purchased Receivables | 31-60 days past due
Financing Receivable, Past Due
Total Finance Receivables	11	19
Caterpillar Purchased Receivables | 61-90 days past due
Financing Receivable, Past Due
Total Finance Receivables	6	7
Caterpillar Purchased Receivables | 91+ days past due
Financing Receivable, Past Due
Total Finance Receivables	6	6
Caterpillar Purchased Receivables | Total Past Due
Financing Receivable, Past Due
Total Finance Receivables	23	32
Caterpillar Purchased Receivables | Current
Financing Receivable, Past Due
Total Finance Receivables	4,454	4,251
Caterpillar Purchased Receivables | North America
Financing Receivable, Past Due
Total Finance Receivables	2,772	2,607
Caterpillar Purchased Receivables | North America | 31-60 days past due
Financing Receivable, Past Due
Total Finance Receivables	5	14
Caterpillar Purchased Receivables | North America | 61-90 days past due
Financing Receivable, Past Due
Total Finance Receivables	4	5
Caterpillar Purchased Receivables | North America | 91+ days past due
Financing Receivable, Past Due
Total Finance Receivables	4	4
Caterpillar Purchased Receivables | North America | Total Past Due
Financing Receivable, Past Due
Total Finance Receivables	13	23
Caterpillar Purchased Receivables | North America | Current
Financing Receivable, Past Due
Total Finance Receivables	2,759	2,584
Caterpillar Purchased Receivables | EAME
Financing Receivable, Past Due
Total Finance Receivables	806	744
Caterpillar Purchased Receivables | EAME | 31-60 days past due
Financing Receivable, Past Due
Total Finance Receivables	4	3
Caterpillar Purchased Receivables | EAME | 61-90 days past due
Financing Receivable, Past Due
Total Finance Receivables	2	1
Caterpillar Purchased Receivables | EAME | 91+ days past due
Financing Receivable, Past Due
Total Finance Receivables	1	0
Caterpillar Purchased Receivables | EAME | Total Past Due
Financing Receivable, Past Due
Total Finance Receivables	7	4
Caterpillar Purchased Receivables | EAME | Current
Financing Receivable, Past Due
Total Finance Receivables	799	740
Caterpillar Purchased Receivables | Asia/Pacific
Financing Receivable, Past Due
Total Finance Receivables	508	529
Caterpillar Purchased Receivables | Asia/Pacific | 31-60 days past due
Financing Receivable, Past Due
Total Finance Receivables	1	0
Caterpillar Purchased Receivables | Asia/Pacific | 61-90 days past due
Financing Receivable, Past Due
Total Finance Receivables	0	0
Caterpillar Purchased Receivables | Asia/Pacific | 91+ days past due
Financing Receivable, Past Due
Total Finance Receivables	0	1
Caterpillar Purchased Receivables | Asia/Pacific | Total Past Due
Financing Receivable, Past Due
Total Finance Receivables	1	1
Caterpillar Purchased Receivables | Asia/Pacific | Current
Financing Receivable, Past Due
Total Finance Receivables	507	528
Caterpillar Purchased Receivables | Latin America
Financing Receivable, Past Due
Total Finance Receivables	375	383
Caterpillar Purchased Receivables | Latin America | 31-60 days past due
Financing Receivable, Past Due
Total Finance Receivables	0	0
Caterpillar Purchased Receivables | Latin America | 61-90 days past due
Financing Receivable, Past Due
Total Finance Receivables	0	0
Caterpillar Purchased Receivables | Latin America | 91+ days past due
Financing Receivable, Past Due
Total Finance Receivables	0	0
Caterpillar Purchased Receivables | Latin America | Total Past Due
Financing Receivable, Past Due
Total Finance Receivables	0	0
Caterpillar Purchased Receivables | Latin America | Current
Financing Receivable, Past Due
Total Finance Receivables	375	383
Caterpillar Purchased Receivables | Power
Financing Receivable, Past Due
Total Finance Receivables	16	20
Caterpillar Purchased Receivables | Power | 31-60 days past due
Financing Receivable, Past Due
Total Finance Receivables	1	2
Caterpillar Purchased Receivables | Power | 61-90 days past due
Financing Receivable, Past Due
Total Finance Receivables	0	1
Caterpillar Purchased Receivables | Power | 91+ days past due
Financing Receivable, Past Due
Total Finance Receivables	1	1
Caterpillar Purchased Receivables | Power | Total Past Due
Financing Receivable, Past Due
Total Finance Receivables	2	4
Caterpillar Purchased Receivables | Power | Current
Financing Receivable, Past Due
Total Finance Receivables	$ 14	$ 16