Cat Financial Financing Activities - Investment In Finance Receivables On Non-Accrual Status (Details) - USD ($) $ in Millions	9 Months Ended
Sep. 30, 2026	Dec. 31, 2025
Financing Receivable, Nonaccrual
Period after which collection of future income is considered not probable	120 days
Customer
Financing Receivable, Nonaccrual
Non-accrual With an Allowance	$ 168	$ 163
91+ Still Accruing	26	28
North  America \| Customer
Financing Receivable, Nonaccrual
Non-accrual With an Allowance	84	90
91+ Still Accruing	14	20
EAME \| Customer
Financing Receivable, Nonaccrual
Non-accrual With an Allowance	42	35
91+ Still Accruing	7	5
Asia/  Pacific \| Customer
Financing Receivable, Nonaccrual
Non-accrual With an Allowance	10	4
91+ Still Accruing	4	2
Latin  America \| Dealer
Financing Receivable, Nonaccrual
Non-accrual With an Allowance	0	0
Latin  America \| Customer
Financing Receivable, Nonaccrual
Non-accrual With an Allowance	31	24
91+ Still Accruing	1	1
Mining \| Customer
Financing Receivable, Nonaccrual
Non-accrual With an Allowance	1	10
91+ Still Accruing	$ 0	$ 0

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.

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