Cat Financial Financing Activities - Modifications (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2026	Mar. 31, 2025
Weighted average payment deferral and/or interest only periods
Finance receivable, modifications
Financing receivable, borrowers not considered to be experiencing financial difficulty, maximum period	4 months
Weighted average extension to term of modified contracts
Finance receivable, modifications
Financing receivable, borrowers not considered to be experiencing financial difficulty, maximum period	6 months
Dealer
Finance receivable, modifications
Amortized cost of finance receivables modified	$ 0	$ 0
Customer
Finance receivable, modifications
Amortized cost of finance receivables modified	$ 11	$ 6

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 310
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