Credit Commitments (Details) $ in Millions	1 Months Ended	12 Months Ended
	Aug. 31, 2025 USD ($)	Dec. 31, 2025 USD ($)	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)
Line of Credit Facility
Number of global credit facilities		3
Amount available		$ 11,500
Maximum borrowing capacity from Caterpillar, Variable lending agreements		3,520
Maximum lending capacity to Caterpillar, Variable lending agreements		$ 2,290
Termination, minimum number of days to notify		30 days
Term lending agreements, maximum remaining maturity		9 years
Notes receivable		$ 663	$ 559	$ 527
Caterpillar
Line of Credit Facility
Maximum borrowing capacity from Caterpillar, Variable lending agreements		3,520
Maximum lending capacity to Caterpillar, Variable lending agreements		2,290
Notes payable		1,024	10	$ 24
Revolving credit facilities
Line of Credit Facility
Amount outstanding		0
Revolving credit facilities | Cat Financial
Line of Credit Facility
Amount available		8,630
364-day facility
Line of Credit Facility
Amount available	$ 3,500
364-day facility | Credit Facility 1
Line of Credit Facility
Term	364 days
364-day facility | Cat Financial
Line of Credit Facility
Amount available	$ 2,630
Three-year facility
Line of Credit Facility
Amount available	$ 3,000
Three-year facility | Credit Facility 1
Line of Credit Facility
Term	3 years
Three-year facility | Cat Financial
Line of Credit Facility
Amount available	$ 2,250
Five-year facility
Line of Credit Facility
Amount available	$ 5,000
Five-year facility | Credit Facility 1
Line of Credit Facility
Term	5 years
Five-year facility | Cat Financial
Line of Credit Facility
Amount available	$ 3,750
Credit lines with banks
Line of Credit Facility
Amount available		3,440
Amount outstanding		$ 771	$ 687