Variable Interest Entities - Firm Sponsored VIEs (Details) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Firm sponsored mortgage and other consumer securitization trusts [Abstract]
Total assets held by securitization VIEs	$ 222,645	$ 216,745
Retained securitization interests, risk-rated 'A' or better, at fair value	83.00%	79.00%
Corporate & Investment Bank
Firm sponsored mortgage and other consumer securitization trusts [Abstract]
Senior securities purchased in connection with CIB's secondary market-making activities	$ 210	$ 145
Subordinated securities purchased in connection with CIB's secondary market-making activities	91	36
Residential mortgage \| Investment-grade
Firm sponsored mortgage and other consumer securitization trusts [Abstract]
Fair value of retained interests	1,900	1,600
Residential mortgage \| Noninvestment-grade
Firm sponsored mortgage and other consumer securitization trusts [Abstract]
Fair value of retained interests	68	131
Residential mortgage \| Prime / Alt-A & option ARMs
Firm sponsored mortgage and other consumer securitization trusts [Abstract]
Total assets held by securitization VIEs	57,739	55,085
Residential mortgage \| Subprime
Firm sponsored mortgage and other consumer securitization trusts [Abstract]
Total assets held by securitization VIEs	10,563	10,966
Commercial and other
Firm sponsored mortgage and other consumer securitization trusts [Abstract]
Total assets held by securitization VIEs	154,343	150,694
Commercial and other \| Investment-grade
Firm sponsored mortgage and other consumer securitization trusts [Abstract]
Fair value of retained interests	4,300	3,500
Commercial and other \| Noninvestment-grade
Firm sponsored mortgage and other consumer securitization trusts [Abstract]
Fair value of retained interests	931	929
VIEs consolidated by the Firm
Firm sponsored mortgage and other consumer securitization trusts [Abstract]
Assets held in consolidated securitization VIEs	869	969
VIEs consolidated by the Firm \| Residential mortgage \| Prime / Alt-A & option ARMs
Firm sponsored mortgage and other consumer securitization trusts [Abstract]
Assets held in consolidated securitization VIEs	862	942
VIEs consolidated by the Firm \| Residential mortgage \| Subprime
Firm sponsored mortgage and other consumer securitization trusts [Abstract]
Assets held in consolidated securitization VIEs	7	27
VIEs consolidated by the Firm \| Commercial and other
Firm sponsored mortgage and other consumer securitization trusts [Abstract]
Assets held in consolidated securitization VIEs	0	0
Nonconsolidated entities
Firm sponsored mortgage and other consumer securitization trusts [Abstract]
Assets held in nonconsolidated securitization VIEs with continuing involvement	173,746	150,842
Interest in securitized assets in nonconsolidated VIEs	7,268	6,206
Nonconsolidated entities \| Trading assets
Firm sponsored mortgage and other consumer securitization trusts [Abstract]
Interest in securitized assets in nonconsolidated VIEs	1,458	1,647
Nonconsolidated entities \| Investment securities
Firm sponsored mortgage and other consumer securitization trusts [Abstract]
Interest in securitized assets in nonconsolidated VIEs	5,292	3,958
Nonconsolidated entities \| Other financial assets
Firm sponsored mortgage and other consumer securitization trusts [Abstract]
Interest in securitized assets in nonconsolidated VIEs	518	601
Nonconsolidated entities \| Residential mortgage \| Prime / Alt-A & option ARMs
Firm sponsored mortgage and other consumer securitization trusts [Abstract]
Assets held in nonconsolidated securitization VIEs with continuing involvement	50,727	47,029
Interest in securitized assets in nonconsolidated VIEs	2,012	1,753
Nonconsolidated entities \| Residential mortgage \| Subprime
Firm sponsored mortgage and other consumer securitization trusts [Abstract]
Assets held in nonconsolidated securitization VIEs with continuing involvement	9,764	10,115
Interest in securitized assets in nonconsolidated VIEs	2	2
Nonconsolidated entities \| Residential mortgage \| Trading assets \| Prime / Alt-A & option ARMs
Firm sponsored mortgage and other consumer securitization trusts [Abstract]
Interest in securitized assets in nonconsolidated VIEs	708	974
Nonconsolidated entities \| Residential mortgage \| Trading assets \| Subprime
Firm sponsored mortgage and other consumer securitization trusts [Abstract]
Interest in securitized assets in nonconsolidated VIEs	2	2
Nonconsolidated entities \| Residential mortgage \| Investment securities \| Prime / Alt-A & option ARMs
Firm sponsored mortgage and other consumer securitization trusts [Abstract]
Interest in securitized assets in nonconsolidated VIEs	1,263	684
Nonconsolidated entities \| Residential mortgage \| Investment securities \| Subprime
Firm sponsored mortgage and other consumer securitization trusts [Abstract]
Interest in securitized assets in nonconsolidated VIEs	0	0
Nonconsolidated entities \| Residential mortgage \| Other financial assets \| Prime / Alt-A & option ARMs
Firm sponsored mortgage and other consumer securitization trusts [Abstract]
Interest in securitized assets in nonconsolidated VIEs	41	95
Nonconsolidated entities \| Residential mortgage \| Other financial assets \| Subprime
Firm sponsored mortgage and other consumer securitization trusts [Abstract]
Interest in securitized assets in nonconsolidated VIEs	0	0
Nonconsolidated entities \| Commercial and other
Firm sponsored mortgage and other consumer securitization trusts [Abstract]
Assets held in nonconsolidated securitization VIEs with continuing involvement	113,255	93,698
Interest in securitized assets in nonconsolidated VIEs	5,254	4,451
Nonconsolidated entities \| Commercial and other \| Trading assets
Firm sponsored mortgage and other consumer securitization trusts [Abstract]
Interest in securitized assets in nonconsolidated VIEs	748	671
Nonconsolidated entities \| Commercial and other \| Investment securities
Firm sponsored mortgage and other consumer securitization trusts [Abstract]
Interest in securitized assets in nonconsolidated VIEs	4,029	3,274
Nonconsolidated entities \| Commercial and other \| Other financial assets
Firm sponsored mortgage and other consumer securitization trusts [Abstract]
Interest in securitized assets in nonconsolidated VIEs	$ 477	$ 506

Firm-sponsored mortgage and other consumer securitization trusts.

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- Definition

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.

+ References

No definition available.

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- Definition

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

+ References

No definition available.

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- Definition

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

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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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
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 20
-Section 50
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+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 20
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+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (a)(3)
-URI http://asc.fasb.org/extlink&oid=121570589&loc=d3e107314-111719

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