Sales of Receivables and Servicing Rights - Additional Information (Details) $ in Billions	12 Months Ended
	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Transfers and Servicing [Abstract]
Servicing of residential mortgage loans for other investors	$ 100.8	$ 103.2
Weighted-average coupon of the MSR portfolio (as a percent)	0.0372	0.0359