Guarantees and Product Warranty (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Commitments and Contingencies Disclosure [Abstract]
Related liability	$ 4	$ 2
Guarantor Obligations
Guarantees, maximum potential amount of future payments	572	511
SPC assets in consolidated statement	83,649	81,943
SPC liabilities in consolidated statement	65,479	66,052
Caterpillar dealer performance guarantees
Guarantor Obligations
Guarantees, maximum potential amount of future payments	191	188
Other guarantees
Guarantor Obligations
Guarantees, maximum potential amount of future payments	381	323
Variable Interest Entity, Primary Beneficiary
Guarantor Obligations
SPC assets in consolidated statement	1,130	971
SPC liabilities in consolidated statement	$ 1,130	$ 970