Variable Interest Entities - Firm Sponsored VIEs (Details) - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024
Firm-sponsored mortgage and other consumer securitization trusts
Total assets held by securitization VIEs	$ 306,687	$ 266,202
Subordinated securities purchased in connection with CIB's secondary market-making activities	$ 56	$ 49
Retained securitization interests, risk-rated 'A' or better, at fair value	74.00%	77.00%
CIB
Firm-sponsored mortgage and other consumer securitization trusts
Senior securities purchased in connection with CIB's secondary market-making activities	$ 188	$ 256
Residential mortgage \| Investment-grade
Firm-sponsored mortgage and other consumer securitization trusts
Fair value of retained interests	3,500	2,900
Residential mortgage \| Noninvestment-grade
Firm-sponsored mortgage and other consumer securitization trusts
Fair value of retained interests	525	216
Residential mortgage \| Prime/Alt-A and option ARMs
Firm-sponsored mortgage and other consumer securitization trusts
Total assets held by securitization VIEs	83,442	71,085
Residential mortgage \| Subprime
Firm-sponsored mortgage and other consumer securitization trusts
Total assets held by securitization VIEs	10,690	8,824
Commercial and other
Firm-sponsored mortgage and other consumer securitization trusts
Total assets held by securitization VIEs	212,555	186,293
Commercial and other \| Investment-grade
Firm-sponsored mortgage and other consumer securitization trusts
Fair value of retained interests	6,200	6,000
Commercial and other \| Noninvestment-grade
Firm-sponsored mortgage and other consumer securitization trusts
Fair value of retained interests	1,100	1,400
VIEs consolidated by the Firm
Firm-sponsored mortgage and other consumer securitization trusts
Assets held in consolidated securitization VIEs	718	858
VIEs consolidated by the Firm \| Residential mortgage \| Prime/Alt-A and option ARMs
Firm-sponsored mortgage and other consumer securitization trusts
Assets held in consolidated securitization VIEs	548	615
VIEs consolidated by the Firm \| Residential mortgage \| Subprime
Firm-sponsored mortgage and other consumer securitization trusts
Assets held in consolidated securitization VIEs	0	0
VIEs consolidated by the Firm \| Commercial and other
Firm-sponsored mortgage and other consumer securitization trusts
Assets held in consolidated securitization VIEs	170	243
Nonconsolidated entities
Firm-sponsored mortgage and other consumer securitization trusts
Assets held in nonconsolidated securitization VIEs with continuing involvement	200,277	178,203
Interest in securitized assets in nonconsolidated VIEs	11,474	10,512
Nonconsolidated entities \| Trading assets
Firm-sponsored mortgage and other consumer securitization trusts
Interest in securitized assets in nonconsolidated VIEs	2,029	1,187
Nonconsolidated entities \| Investment securities - AFS
Firm-sponsored mortgage and other consumer securitization trusts
Interest in securitized assets in nonconsolidated VIEs	7,096	7,637
Nonconsolidated entities \| Other financial assets
Firm-sponsored mortgage and other consumer securitization trusts
Interest in securitized assets in nonconsolidated VIEs	2,349	1,688
Nonconsolidated entities \| Residential mortgage \| Prime/Alt-A and option ARMs
Firm-sponsored mortgage and other consumer securitization trusts
Assets held in nonconsolidated securitization VIEs with continuing involvement	58,525	50,846
Interest in securitized assets in nonconsolidated VIEs	4,032	3,077
Nonconsolidated entities \| Residential mortgage \| Subprime
Firm-sponsored mortgage and other consumer securitization trusts
Assets held in nonconsolidated securitization VIEs with continuing involvement	2,766	1,847
Interest in securitized assets in nonconsolidated VIEs	112	63
Nonconsolidated entities \| Residential mortgage \| Trading assets \| Prime/Alt-A and option ARMs
Firm-sponsored mortgage and other consumer securitization trusts
Interest in securitized assets in nonconsolidated VIEs	707	613
Nonconsolidated entities \| Residential mortgage \| Trading assets \| Subprime
Firm-sponsored mortgage and other consumer securitization trusts
Interest in securitized assets in nonconsolidated VIEs	100	44
Nonconsolidated entities \| Residential mortgage \| Investment securities - AFS \| Prime/Alt-A and option ARMs
Firm-sponsored mortgage and other consumer securitization trusts
Interest in securitized assets in nonconsolidated VIEs	1,799	1,850
Nonconsolidated entities \| Residential mortgage \| Investment securities - AFS \| Subprime
Firm-sponsored mortgage and other consumer securitization trusts
Interest in securitized assets in nonconsolidated VIEs	12	19
Nonconsolidated entities \| Residential mortgage \| Other financial assets \| Prime/Alt-A and option ARMs
Firm-sponsored mortgage and other consumer securitization trusts
Interest in securitized assets in nonconsolidated VIEs	1,526	614
Nonconsolidated entities \| Residential mortgage \| Other financial assets \| Subprime
Firm-sponsored mortgage and other consumer securitization trusts
Interest in securitized assets in nonconsolidated VIEs	0	0
Nonconsolidated entities \| Commercial and other
Firm-sponsored mortgage and other consumer securitization trusts
Assets held in nonconsolidated securitization VIEs with continuing involvement	138,986	125,510
Interest in securitized assets in nonconsolidated VIEs	7,330	7,372
Nonconsolidated entities \| Commercial and other \| Trading assets
Firm-sponsored mortgage and other consumer securitization trusts
Interest in securitized assets in nonconsolidated VIEs	1,222	530
Nonconsolidated entities \| Commercial and other \| Investment securities - AFS
Firm-sponsored mortgage and other consumer securitization trusts
Interest in securitized assets in nonconsolidated VIEs	5,285	5,768
Nonconsolidated entities \| Commercial and other \| Other financial assets
Firm-sponsored mortgage and other consumer securitization trusts
Interest in securitized assets in nonconsolidated VIEs	$ 823	$ 1,074

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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- Definition

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.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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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.

+ References

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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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