Sales of Receivables and Servicing Rights - Changes in the Servicing Assets (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Servicing Asset at Fair Value, Amount [Roll Forward]
Balance, beginning of period			$ 1,746	$ 1,121
Servicing rights originated			57	186
Servicing rights purchased			25	208
Changes in fair value: Due to changes in inputs or assumptions	$ 73	$ 83	107	358
Changes in fair value: Other changes in fair value			(113)	(141)
Balance, end of period	$ 1,822	$ 1,732	$ 1,822	$ 1,732