Transfers of Receivables - Exposure Based on Fair Value of Derivative Instruments (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Securitization Transactions [Line Items]
Fair Value of Derivative Assets	$ 818	$ 987
Fair Value of Derivative Liabilities	2,141	3,026
Securitization Transactions [Member]
Securitization Transactions [Line Items]
Fair Value of Derivative Assets	187	503
Fair Value of Derivative Liabilities	122	124
Related to Variable Interest Entity - Not VIE [Member] | Securitization Transactions [Member]
Securitization Transactions [Line Items]
Fair Value of Derivative Assets	7	0
Fair Value of Derivative Liabilities	48	121
Other, Not Variable Interest Entity Related [Member] | Securitization Transactions [Member]
Securitization Transactions [Line Items]
Fair Value of Derivative Assets	90	239
Fair Value of Derivative Liabilities	29	1
Variable Interest Entity, Primary Beneficiary [Member]
Securitization Transactions [Line Items]
Fair Value of Derivative Assets	90	264
Fair Value of Derivative Liabilities	45	2
Variable Interest Entity, Primary Beneficiary [Member] | Securitization Transactions [Member]
Securitization Transactions [Line Items]
Fair Value of Derivative Assets	90	264
Fair Value of Derivative Liabilities	$ 45	$ 2