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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 860
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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, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2024
Securitized loans
Information about delinquencies, net charge-offs, and components of off-balance sheet securitized financial assets [Abstract]
90 days past due	$ 3,665		$ 3,665		$ 2,329
Net liquidation losses/(recoveries)	136	$ 17	262	$ 44
Commercial and other \| Securitized loans
Information about delinquencies, net charge-offs, and components of off-balance sheet securitized financial assets [Abstract]
90 days past due	2,927		2,927		1,715
Net liquidation losses/(recoveries)	134	14	255	33
Nonconsolidated entities
Information about delinquencies, net charge-offs, and components of off-balance sheet securitized financial assets [Abstract]
Securitized assets	207,121		207,121		178,203
Nonconsolidated entities \| Commercial and other
Information about delinquencies, net charge-offs, and components of off-balance sheet securitized financial assets [Abstract]
Securitized assets	144,356		144,356		125,510
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 days past due	645		645		501
Net liquidation losses/(recoveries)	2	2	7	9
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	59,952		59,952		50,846
Subprime \| Residential mortgage \| Securitized loans
Information about delinquencies, net charge-offs, and components of off-balance sheet securitized financial assets [Abstract]
90 days past due	93		93		113
Net liquidation losses/(recoveries)	0	$ 1	0	$ 2
Subprime \| Nonconsolidated entities \| Residential mortgage
Information about delinquencies, net charge-offs, and components of off-balance sheet securitized financial assets [Abstract]
Securitized assets	$ 2,813		$ 2,813		$ 1,847