Consolidations and Transfers of Financial Assets - Unconsolidated VIEs (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Variable Interest Entities [Line Items]
Investments in securities, at fair value	$ 50,825	$ 89,043
Other assets	13,387	12,114
Other liabilities	(13,206)	(14,432)
Assets	4,305,288	4,229,166
Unpaid principal balance of mortgage loans	4,075,598	3,899,025
Not Primary Beneficiary | Mortgage-related securities
Variable Interest Entities [Line Items]
Investments in securities, at fair value	3,353	4,709
Other assets	40	35
Other liabilities	(45)	(41)
Net carrying amount	3,348	4,703
Maximum exposure to loss	240,000	220,000
Assets	240,000	250,000
Not Primary Beneficiary | Partnership interest
Variable Interest Entities [Line Items]
Net carrying amount	424	288
Maximum exposure to loss	427	292
Assets	4,300	3,700
Not Primary Beneficiary | Debt securities
Variable Interest Entities [Line Items]
Maximum exposure to loss	16,900	10,400
Assets	17,000	10,400
Multifamily
Variable Interest Entities [Line Items]
Unpaid principal balance of mortgage loans	431,440	$ 403,452
Multifamily | Not Primary Beneficiary
Variable Interest Entities [Line Items]
Unpaid principal balance of mortgage loans	$ 431,400