Mortgage Servicing Rights and Related Liabilities - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Servicing Assets at Fair Value [Line Items]
Sale of Excess Yield, Principal Outstanding	$ 27,841	$ 41,958
Sale of Excess Yield, Total Proceeds	226	294
Gain on Sale of Excess Yield	27	33
Excess Spread Financing UPB, Fair Value Disclosure	66,519	74,219
Forward MSRs Sold
Servicing Assets at Fair Value [Line Items]
Unpaid principal balance sold	26,739	25,239
Forward MSRs Sold, Subservicing Retained
Servicing Assets at Fair Value [Line Items]
Principal amount outstanding on mortgage servicing rights	$ 26,156	$ 23,218