Finance Receivables - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025	Dec. 31, 2025
Accounts, Notes, Loans and Financing Receivable
Finance lease revenue	$ 118	$ 118	$ 238	$ 230
Financing receivable, average term	51 months		51 months
Financing receivable, average remaining term	28 months		28 months
Period after which unpaid installments are considered as past due	30 days		30 days
Payment Deferral
Accounts, Notes, Loans and Financing Receivable
Financing receivable, modified in period, maximum period			4 months
Extended Maturity
Accounts, Notes, Loans and Financing Receivable
Financing receivable, modified in period, maximum period			6 months
Dealer
Accounts, Notes, Loans and Financing Receivable
Financing receivable, nonaccrual	$ 0		$ 0		$ 0
Financing receivable, modified in period		0	0
Caterpillar Purchased Receivables
Accounts, Notes, Loans and Financing Receivable
Financing receivable, modified in period	0			0
Customer
Accounts, Notes, Loans and Financing Receivable
Financing receivable, gross write-offs	4	2	7	5
Financing receivable, nonaccrual	178		178		163
Financing receivable, modified in period	$ 20	$ 16	$ 31	$ 20
Financing receivable, modified in period, percentage	0.08%	0.07%	0.12%	0.08%
Customer | Latin America
Accounts, Notes, Loans and Financing Receivable
Financing receivable, gross write-offs	$ 1	$ 0	$ 1	$ 1
Financing receivable, nonaccrual	$ 34		$ 34		$ 24