Mortgage Servicing Rights and Related Liabilities - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Jun. 30, 2022
Servicing Assets at Fair Value [Line Items]
Excess Spread Financing UPB, Fair Value Disclosure	$ 83,706	$ 126,103
Excess Spread Financing Repurchase, Purchase Price			$ 277
Forward MSRs Sold
Servicing Assets at Fair Value [Line Items]
Unpaid principal balance sold	20,902	5,163
Forward MSRs Sold, Subservicing Retained
Servicing Assets at Fair Value [Line Items]
Principal amount outstanding on mortgage servicing rights	$ 19,817	$ 3,937