Transactions with Related Parties (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Related Party Transaction
Dividend paid to Caterpillar	$ 850	$ 300	$ 25
Maximum borrowing capacity from Caterpillar, Variable lending agreements	2,400
Maximum lending capacity to Caterpillar, Variable lending agreements	1,730
Payable to Caterpillar - borrowings	22	1,022	618
Payable to Caterpillar - other	73	65	75
Notes receivable from Caterpillar	389	356	296
Other receivables from Caterpillar	400	457
Revenue earned on purchased receivables	301	308	455
Total finance receivables	27,514	27,054
Revenues	2,562	2,550	2,966
Depreciation on equipment leased to others	755	758	813
Caterpillar
Related Party Transaction
Dividend paid to Caterpillar	850	300	25
Maximum borrowing capacity from Caterpillar, Variable lending agreements	2,400
Maximum lending capacity to Caterpillar, Variable lending agreements	1,730
Amount available, Committed credit facility extended to Caterpillar	2,000
Other receivables from Caterpillar	70	65	64
Interest expense, Caterpillar	0	2	32
Interest income on Notes Receivable with Caterpillar	14	14	26
Fees on committed credit facility extended to Caterpillar	0	0	5
Purchases of receivables from Caterpillar	40,140	32,937	42,817
Revenue earned on purchased receivables	301	308	455
Marketing program payments received	351	353	351
Total portfolio, which includes Finance receivables, net and Equipment on operating lease, net	147	141
Revenues	25	22	16
Depreciation on equipment leased to others	17	15	11
Amount of our portfolio that is subject to guarantees by Caterpillar	568	596
Stock based compensation expense	8	8	8
Operational and administrative support charges reimbursed to Caterpillar	52	46	46
Administrative support services to certain Caterpillar subsidiaries reimbursed by Caterpillar	12	10	13
Caterpillar Purchased Receivables
Related Party Transaction
Total finance receivables	$ 4,462	$ 3,646	$ 4,448