Transfers of Receivables - Exposure Based on Fair Value of Derivative Instruments (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Securitization Transactions [Line Items]
Fair Value of Derivative Assets	$ 1,065	$ 2,601
Fair Value of Derivative Liabilities	512	524
Securitization Transactions [Member]
Securitization Transactions [Line Items]
Fair Value of Derivative Assets	55	5
Fair Value of Derivative Liabilities	38	135
Related to Variable Interest Entity - Not VIE [Member] | Securitization Transactions [Member]
Securitization Transactions [Line Items]
Fair Value of Derivative Assets	0	5
Fair Value of Derivative Liabilities	13	0
Other, Not Variable Interest Entity Related [Member] | Securitization Transactions [Member]
Securitization Transactions [Line Items]
Fair Value of Derivative Assets	16	0
Fair Value of Derivative Liabilities	19	79
Variable Interest Entity, Primary Beneficiary [Member]
Securitization Transactions [Line Items]
Fair Value of Derivative Assets	39	0
Fair Value of Derivative Liabilities	6	56
Variable Interest Entity, Primary Beneficiary [Member] | Securitization Transactions [Member]
Securitization Transactions [Line Items]
Fair Value of Derivative Assets	39	0
Fair Value of Derivative Liabilities	$ 6	$ 56