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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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-Publisher FASB
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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
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Variable Interest Entities - Loan Delinquencies and Liquidation Losses (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Securitized loans
Information about delinquencies, net charge-offs, and components of off-balance sheet securitized financial assets [Abstract]
90 or more days past due	$ 1,933		$ 1,933		$ 3,445
Net liquidation losses/(recoveries)	17	$ 43	44	$ 76
Commercial and other \| Securitized loans
Information about delinquencies, net charge-offs, and components of off-balance sheet securitized financial assets [Abstract]
90 or more days past due	1,337		1,337		2,874
Net liquidation losses/(recoveries)	14	40	33	59
Nonconsolidated entities
Information about delinquencies, net charge-offs, and components of off-balance sheet securitized financial assets [Abstract]
Securitized assets	169,955		169,955		160,893
Nonconsolidated entities \| Commercial and other
Information about delinquencies, net charge-offs, and components of off-balance sheet securitized financial assets [Abstract]
Securitized assets	120,205		120,205		120,262
Prime / Alt-A & option ARMs \| Residential mortgage \| Securitized loans
Information about delinquencies, net charge-offs, and components of off-balance sheet securitized financial assets [Abstract]
90 or more days past due	491		491		440
Net liquidation losses/(recoveries)	2	2	9	12
Prime / Alt-A & option ARMs \| Nonconsolidated entities \| Residential mortgage
Information about delinquencies, net charge-offs, and components of off-balance sheet securitized financial assets [Abstract]
Securitized assets	48,312		48,312		39,319
Subprime \| Residential mortgage \| Securitized loans
Information about delinquencies, net charge-offs, and components of off-balance sheet securitized financial assets [Abstract]
90 or more days past due	105		105		131
Net liquidation losses/(recoveries)	1	$ 1	2	$ 5
Subprime \| Nonconsolidated entities \| Residential mortgage
Information about delinquencies, net charge-offs, and components of off-balance sheet securitized financial assets [Abstract]
Securitized assets	$ 1,438		$ 1,438		$ 1,312