Finance Receivables - Aging Related to Finance Receivables (Details) - USD ($) $ in Millions	Jun. 30, 2026	Dec. 31, 2025	Jun. 30, 2025
Financing Receivable, Past Due
Total Finance Receivables	$ 35,098	$ 33,099	$ 30,896
Caterpillar Purchased Receivables
Financing Receivable, Past Due
Total Finance Receivables	6,717	5,500	$ 4,582
Caterpillar Purchased Receivables | Current
Financing Receivable, Past Due
Total Finance Receivables	6,693	5,475
Caterpillar Purchased Receivables | 31-60 Days Past Due
Financing Receivable, Past Due
Total Finance Receivables	16	13
Caterpillar Purchased Receivables | 61-90 Days Past Due
Financing Receivable, Past Due
Total Finance Receivables	4	7
Caterpillar Purchased Receivables | 91+ Days Past Due
Financing Receivable, Past Due
Total Finance Receivables	4	5
Caterpillar Purchased Receivables | North America
Financing Receivable, Past Due
Total Finance Receivables	3,916	3,263
Caterpillar Purchased Receivables | North America | Current
Financing Receivable, Past Due
Total Finance Receivables	3,897	3,242
Caterpillar Purchased Receivables | North America | 31-60 Days Past Due
Financing Receivable, Past Due
Total Finance Receivables	11	9
Caterpillar Purchased Receivables | North America | 61-90 Days Past Due
Financing Receivable, Past Due
Total Finance Receivables	4	7
Caterpillar Purchased Receivables | North America | 91+ Days Past Due
Financing Receivable, Past Due
Total Finance Receivables	4	5
Caterpillar Purchased Receivables | EAME
Financing Receivable, Past Due
Total Finance Receivables	1,411	1,190
Caterpillar Purchased Receivables | EAME | Current
Financing Receivable, Past Due
Total Finance Receivables	1,410	1,189
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	0	0
Caterpillar Purchased Receivables | EAME | 91+ Days Past Due
Financing Receivable, Past Due
Total Finance Receivables	0	0
Caterpillar Purchased Receivables | Asia/Pacific
Financing Receivable, Past Due
Total Finance Receivables	788	647
Caterpillar Purchased Receivables | Asia/Pacific | Current
Financing Receivable, Past Due
Total Finance Receivables	786	646
Caterpillar Purchased Receivables | Asia/Pacific | 31-60 Days Past Due
Financing Receivable, Past Due
Total Finance Receivables	2	1
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	0
Caterpillar Purchased Receivables | Latin America
Financing Receivable, Past Due
Total Finance Receivables	585	387
Caterpillar Purchased Receivables | Latin America | Current
Financing Receivable, Past Due
Total Finance Receivables	585	387
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 | Power
Financing Receivable, Past Due
Total Finance Receivables	17	13
Caterpillar Purchased Receivables | Power | Current
Financing Receivable, Past Due
Total Finance Receivables	15	11
Caterpillar Purchased Receivables | Power | 31-60 Days Past Due
Financing Receivable, Past Due
Total Finance Receivables	2	2
Caterpillar Purchased Receivables | Power | 61-90 Days Past Due
Financing Receivable, Past Due
Total Finance Receivables	0	0
Caterpillar Purchased Receivables | Power | 91+ Days Past Due
Financing Receivable, Past Due
Total Finance Receivables	$ 0	$ 0