Transactions with Related Parties (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Related Party Transaction
Dividend paid to Caterpillar	$ 425	$ 275	$ 850
Maximum borrowing capacity from Caterpillar, Variable lending agreements	2,440
Maximum lending capacity to Caterpillar, Variable lending agreements	2,140
Payable to dealers and others	157	163
Other receivables from Caterpillar	332	419
Interest	1,033	566	455
Revenue earned on purchased receivables	617	417	301
Financing Receivable, before Allowance for Credit Loss	28,077	26,787
Revenues	3,248	2,734	2,562
Depreciation on equipment leased to others	713	718	755
General, operating and administrative	588	531	528
Caterpillar
Related Party Transaction
Dividend paid to Caterpillar	425	275	850
Maximum borrowing capacity from Caterpillar, Variable lending agreements	2,440
Maximum lending capacity to Caterpillar, Variable lending agreements	2,140
Notes Payable	24	23	22
Payable to dealers and others	113	101	73
Notes receivable from Caterpillar	527	482	389
Other receivables from Caterpillar	39	133	70
Interest	1	1	0
Interest income on Notes Receivable with Caterpillar(1)	21	17	14
Purchases of receivables from Caterpillar	53,382	47,158	40,140
Revenue earned on purchased receivables	617	417	301
Marketing program payments received	332	339	351
Total portfolio, which includes Finance receivables, net and Equipment on operating lease, net	155	143
Revenues	27	24	25
Depreciation on equipment leased to others	18	17	17
Amount of our portfolio that is subject to guarantees by Caterpillar	376	448
General, operating and administrative	50	52	52
Administrative support services to certain Caterpillar subsidiaries reimbursed by Caterpillar	15	13	12
Caterpillar Purchased Receivables
Related Party Transaction
Financing Receivable, before Allowance for Credit Loss	$ 3,949	$ 4,297	$ 4,462