Commitments and Contingent Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Guarantor Obligations
Guarantees, maximum potential amount of future payments	$ 26	$ 36
Assets	31,957	32,387	$ 31,991
Liabilities	28,994	29,406
Unused commitments to extend credit to Caterpillar dealers	11,390
Unused commitments to extend credit to customers	888
Variable Interest Entity, Primary Beneficiary
Guarantor Obligations
Assets	971	888
Liabilities	970	888
Maximum
Guarantor Obligations
Related recorded liability	$ 1	$ 1