Variable Interest Entities and Securitization Activities - Mortgage and Asset Backed Securitization Assets (Details) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Variable Interest Entity
Debt and Equity Interests	$ 1,173,776	$ 1,188,140
Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity
UPB	118,492	146,071
Variable Interest Entity, Not Primary Beneficiary | Residential mortgages
Variable Interest Entity
UPB	14,441	15,216
Variable Interest Entity, Not Primary Beneficiary | Commercial mortgages
Variable Interest Entity
UPB	69,267	68,503
Variable Interest Entity, Not Primary Beneficiary | U.S. agency collateralized mortgage obligations
Variable Interest Entity
UPB	31,057	57,972
Variable Interest Entity, Not Primary Beneficiary | Other consumer or commercial loans
Variable Interest Entity
UPB	3,727	4,380
Variable Interest Entity, Not Primary Beneficiary | Debt and Equity Interests
Variable Interest Entity
Debt and Equity Interests	13,038	18,062
Variable Interest Entity, Not Primary Beneficiary | Debt and Equity Interests | Residential mortgages
Variable Interest Entity
Debt and Equity Interests	2,174	2,182
Variable Interest Entity, Not Primary Beneficiary | Debt and Equity Interests | Commercial mortgages
Variable Interest Entity
Debt and Equity Interests	4,489	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	4,562	9,835
Variable Interest Entity, Not Primary Beneficiary | Debt and Equity Interests | Other consumer or commercial loans
Variable Interest Entity
Debt and Equity Interests	$ 1,813	$ 1,953