Finance Receivables - Summary of Finance Receivables Included in the Consolidated Statements of Financial Position (Details) - USD ($) $ in Millions	Jun. 30, 2026	Mar. 31, 2026	Dec. 31, 2025	Jun. 30, 2025	Mar. 31, 2025	Dec. 31, 2024
Accounts, Notes, Loans and Financing Receivable
Total Finance Receivables	$ 35,098		$ 33,099	$ 30,896
Less: Allowance for credit losses	(294)	$ (283)	(284)	$ (290)	$ (282)	$ (267)
Total finance receivables, net	34,804		32,815
Retail loans
Accounts, Notes, Loans and Financing Receivable
Total Finance Receivables	19,761		19,218
Retail finance leases
Accounts, Notes, Loans and Financing Receivable
Total Finance Receivables	6,616		6,870
Caterpillar Purchased Receivables
Accounts, Notes, Loans and Financing Receivable
Total Finance Receivables	6,717		5,500
Wholesale loans
Accounts, Notes, Loans and Financing Receivable
Total Finance Receivables	$ 2,004		$ 1,511