Variable Interest Entities and Securitization Activities - Mortgage and Asset Backed Securitization Assets (Details) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Variable Interest Entity
Debt and Equity Interests	$ 1,160,029	$ 1,188,140
Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity
UPB	125,670	146,071
Variable Interest Entity, Not Primary Beneficiary | Residential mortgages
Variable Interest Entity
UPB	11,853	15,216
Variable Interest Entity, Not Primary Beneficiary | Commercial mortgages
Variable Interest Entity
UPB	78,298	68,503
Variable Interest Entity, Not Primary Beneficiary | U.S. agency collateralized mortgage obligations
Variable Interest Entity
UPB	32,493	57,972
Variable Interest Entity, Not Primary Beneficiary | Other consumer or commercial loans
Variable Interest Entity
UPB	3,026	4,380
Variable Interest Entity, Not Primary Beneficiary | Debt and Equity Interests
Variable Interest Entity
Debt and Equity Interests	12,946	18,062
Variable Interest Entity, Not Primary Beneficiary | Debt and Equity Interests | Residential mortgages
Variable Interest Entity
Debt and Equity Interests	2,002	2,182
Variable Interest Entity, Not Primary Beneficiary | Debt and Equity Interests | Commercial mortgages
Variable Interest Entity
Debt and Equity Interests	4,572	4,092
Variable Interest Entity, Not Primary Beneficiary | Debt and Equity Interests | U.S. agency collateralized mortgage obligations
Variable Interest Entity
Debt and Equity Interests	4,865	9,835
Variable Interest Entity, Not Primary Beneficiary | Debt and Equity Interests | Other consumer or commercial loans
Variable Interest Entity
Debt and Equity Interests	$ 1,507	$ 1,953