Variable Interest Entities - Firm Sponsored VIEs (Details) - USD ($) $ in Millions	Sep. 30, 2026	Dec. 31, 2025
Firm sponsored mortgage and other consumer securitization trusts
Total assets held by securitization VIEs	$ 333,271	$ 306,687
Subordinated securities purchased in connection with CIB's secondary market-making activities	$ 56	$ 56
Retained securitization interests, risk-rated 'A' or better, at fair value	67.00%	74.00%
Commercial & Investment Bank
Firm sponsored mortgage and other consumer securitization trusts
Senior securities purchased in connection with CIB's secondary market-making activities	$ 306	$ 188
VIEs consolidated by the Firm
Firm sponsored mortgage and other consumer securitization trusts
Assets held in consolidated securitization VIEs	614	718
Nonconsolidated entities
Firm sponsored mortgage and other consumer securitization trusts
Assets held in nonconsolidated securitization VIEs with continuing involvement	218,521	200,277
Interest in securitized assets in nonconsolidated VIEs	12,163	11,474
Trading assets \| Nonconsolidated entities
Firm sponsored mortgage and other consumer securitization trusts
Interest in securitized assets in nonconsolidated VIEs	1,992	2,029
Investment securities \| Nonconsolidated entities
Firm sponsored mortgage and other consumer securitization trusts
Interest in securitized assets in nonconsolidated VIEs	6,805	7,096
Other financial assets \| Nonconsolidated entities
Firm sponsored mortgage and other consumer securitization trusts
Interest in securitized assets in nonconsolidated VIEs	3,366	2,349
Residential mortgage \| Investment grade
Firm sponsored mortgage and other consumer securitization trusts
Fair value of retained interests	3,400	3,500
Residential mortgage \| Non-investment grade
Firm sponsored mortgage and other consumer securitization trusts
Fair value of retained interests	816	525
Residential mortgage \| Prime / Alt-A & option ARMs
Firm sponsored mortgage and other consumer securitization trusts
Total assets held by securitization VIEs	91,603	83,442
Residential mortgage \| Prime / Alt-A & option ARMs \| VIEs consolidated by the Firm
Firm sponsored mortgage and other consumer securitization trusts
Assets held in consolidated securitization VIEs	504	548
Residential mortgage \| Prime / Alt-A & option ARMs \| Nonconsolidated entities
Firm sponsored mortgage and other consumer securitization trusts
Assets held in nonconsolidated securitization VIEs with continuing involvement	65,006	58,525
Interest in securitized assets in nonconsolidated VIEs	4,190	4,032
Residential mortgage \| Subprime
Firm sponsored mortgage and other consumer securitization trusts
Total assets held by securitization VIEs	16,403	10,690
Residential mortgage \| Subprime \| VIEs consolidated by the Firm
Firm sponsored mortgage and other consumer securitization trusts
Assets held in consolidated securitization VIEs	0	0
Residential mortgage \| Subprime \| Nonconsolidated entities
Firm sponsored mortgage and other consumer securitization trusts
Assets held in nonconsolidated securitization VIEs with continuing involvement	9,284	2,766
Interest in securitized assets in nonconsolidated VIEs	460	112
Residential mortgage \| Trading assets \| Prime / Alt-A & option ARMs \| Nonconsolidated entities
Firm sponsored mortgage and other consumer securitization trusts
Interest in securitized assets in nonconsolidated VIEs	729	707
Residential mortgage \| Trading assets \| Subprime \| Nonconsolidated entities
Firm sponsored mortgage and other consumer securitization trusts
Interest in securitized assets in nonconsolidated VIEs	452	100
Residential mortgage \| Investment securities \| Prime / Alt-A & option ARMs \| Nonconsolidated entities
Firm sponsored mortgage and other consumer securitization trusts
Interest in securitized assets in nonconsolidated VIEs	1,963	1,799
Residential mortgage \| Investment securities \| Subprime \| Nonconsolidated entities
Firm sponsored mortgage and other consumer securitization trusts
Interest in securitized assets in nonconsolidated VIEs	8	12
Residential mortgage \| Other financial assets \| Prime / Alt-A & option ARMs \| Nonconsolidated entities
Firm sponsored mortgage and other consumer securitization trusts
Interest in securitized assets in nonconsolidated VIEs	1,498	1,526
Residential mortgage \| Other financial assets \| Subprime \| Nonconsolidated entities
Firm sponsored mortgage and other consumer securitization trusts
Interest in securitized assets in nonconsolidated VIEs	0	0
Commercial and other
Firm sponsored mortgage and other consumer securitization trusts
Total assets held by securitization VIEs	225,265	212,555
Commercial and other \| Investment grade
Firm sponsored mortgage and other consumer securitization trusts
Fair value of retained interests	6,200	6,200
Commercial and other \| Non-investment grade
Firm sponsored mortgage and other consumer securitization trusts
Fair value of retained interests	1,300	1,100
Commercial and other \| VIEs consolidated by the Firm
Firm sponsored mortgage and other consumer securitization trusts
Assets held in consolidated securitization VIEs	110	170
Commercial and other \| Nonconsolidated entities
Firm sponsored mortgage and other consumer securitization trusts
Assets held in nonconsolidated securitization VIEs with continuing involvement	144,231	138,986
Interest in securitized assets in nonconsolidated VIEs	7,513	7,330
Commercial and other \| Trading assets \| Nonconsolidated entities
Firm sponsored mortgage and other consumer securitization trusts
Interest in securitized assets in nonconsolidated VIEs	811	1,222
Commercial and other \| Investment securities \| Nonconsolidated entities
Firm sponsored mortgage and other consumer securitization trusts
Interest in securitized assets in nonconsolidated VIEs	4,834	5,285
Commercial and other \| Other financial assets \| Nonconsolidated entities
Firm sponsored mortgage and other consumer securitization trusts
Interest in securitized assets in nonconsolidated VIEs	$ 1,868	$ 823

Firm-sponsored mortgage and other consumer securitization trusts.

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Percent of retained securitization interests rated A or better.

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No definition available.

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Senior securities purchased in connection with IB secondary market making activities. These securities are excluded from entity interest in securitized assets in nonconsolidated VIEs.

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No definition available.

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Subordinated securities purchased in connection with IB secondary market making Activities. These securities are excluded from entity interest in securitized assets in nonconsolidated VIEs.

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No definition available.

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Principal amount of transferred financial assets in which the transferor has continuing involvement with the assets underlying the transaction. Continuing involvement includes, but is not limited to, servicing, recourse, and restrictions on transferor's interests in transferred financial assets.

+ References

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Amount of transferred financial assets in which the transferor has continuing involvement with the assets underlying the transaction that have been derecognized. Continuing involvement includes, but is not limited to, servicing, recourse, and restrictions on transferor's interests in transferred financial assets.

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The carrying amount (fair value) as of the balance sheet date of the transferor's interests in transferred financial assets (typically securitized receivables, generally not involved in the collection of principal) following transfer of significant portions of such financial instruments to other parties. Such interests could be ancillary cash flows and interest-only strips.

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Fair value portion of interest continued to be held by a transferor after transferring financial assets to a third party.

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