Cat Financial Financing Activities - Financing receivable, nonaccrual (Details) - Finance Receivables - Customer - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Financing Receivable, Nonaccrual [Line Items]
Non-accrual With an Allowance	$ 176	$ 152
91+ Still Accruing	30	44
North America
Financing Receivable, Nonaccrual [Line Items]
Non-accrual With an Allowance	83	52
91+ Still Accruing	20	20
EAME
Financing Receivable, Nonaccrual [Line Items]
Non-accrual With an Allowance	33	34
91+ Still Accruing	5	18
Asia/Pacific
Financing Receivable, Nonaccrual [Line Items]
Non-accrual With an Allowance	5	8
91+ Still Accruing	5	5
Mining
Financing Receivable, Nonaccrual [Line Items]
Non-accrual With an Allowance	29	2
91+ Still Accruing	0	0
Latin America
Financing Receivable, Nonaccrual [Line Items]
Non-accrual With an Allowance	24	48
91+ Still Accruing	0	1
Power
Financing Receivable, Nonaccrual [Line Items]
Non-accrual With an Allowance	2	8
91+ Still Accruing	$ 0	$ 0