Variable Interest Entities - Firm Sponsored VIEs (Details) - USD ($) $ in Millions	Mar. 31, 2025	Dec. 31, 2024
Firm sponsored mortgage and other consumer securitization trusts [Abstract]
Total assets held by securitization VIEs	$ 276,724	$ 266,202
Retained securitization interests, risk-rated 'A' or better, at fair value	78.00%	77.00%
Commercial & Investment Bank
Firm sponsored mortgage and other consumer securitization trusts [Abstract]
Senior securities purchased in connection with CIB's secondary market-making activities	$ 186	$ 256
Subordinated securities purchased in connection with CIB's secondary market-making activities	143	49
Residential mortgage \| Investment-grade
Firm sponsored mortgage and other consumer securitization trusts [Abstract]
Fair value of retained interests	3,100	2,900
Residential mortgage \| Noninvestment-grade
Firm sponsored mortgage and other consumer securitization trusts [Abstract]
Fair value of retained interests	276	216
Residential mortgage \| Prime / Alt-A & option ARMs
Firm sponsored mortgage and other consumer securitization trusts [Abstract]
Total assets held by securitization VIEs	72,674	71,085
Residential mortgage \| Subprime
Firm sponsored mortgage and other consumer securitization trusts [Abstract]
Total assets held by securitization VIEs	9,648	8,824
Commercial and other
Firm sponsored mortgage and other consumer securitization trusts [Abstract]
Total assets held by securitization VIEs	194,402	186,293
Commercial and other \| Investment-grade
Firm sponsored mortgage and other consumer securitization trusts [Abstract]
Fair value of retained interests	6,500	6,000
Commercial and other \| Noninvestment-grade
Firm sponsored mortgage and other consumer securitization trusts [Abstract]
Fair value of retained interests	1,000	1,400
VIEs consolidated by the Firm
Firm sponsored mortgage and other consumer securitization trusts [Abstract]
Assets held in consolidated securitization VIEs	863	858
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	597	615
VIEs consolidated by the Firm \| Residential mortgage \| Subprime
Firm sponsored mortgage and other consumer securitization trusts [Abstract]
Assets held in consolidated securitization VIEs	0	0
VIEs consolidated by the Firm \| Commercial and other
Firm sponsored mortgage and other consumer securitization trusts [Abstract]
Assets held in consolidated securitization VIEs	266	243
Nonconsolidated entities
Firm sponsored mortgage and other consumer securitization trusts [Abstract]
Assets held in nonconsolidated securitization VIEs with continuing involvement	190,894	178,203
Interest in securitized assets in nonconsolidated VIEs	10,879	10,512
Nonconsolidated entities \| Trading assets
Firm sponsored mortgage and other consumer securitization trusts [Abstract]
Interest in securitized assets in nonconsolidated VIEs	1,440	1,187
Nonconsolidated entities \| Investment securities
Firm sponsored mortgage and other consumer securitization trusts [Abstract]
Interest in securitized assets in nonconsolidated VIEs	7,714	7,637
Nonconsolidated entities \| Other financial assets
Firm sponsored mortgage and other consumer securitization trusts [Abstract]
Interest in securitized assets in nonconsolidated VIEs	1,725	1,688
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	54,250	50,846
Interest in securitized assets in nonconsolidated VIEs	3,328	3,077
Nonconsolidated entities \| Residential mortgage \| Subprime
Firm sponsored mortgage and other consumer securitization trusts [Abstract]
Assets held in nonconsolidated securitization VIEs with continuing involvement	1,699	1,847
Interest in securitized assets in nonconsolidated VIEs	55	63
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	765	613
Nonconsolidated entities \| Residential mortgage \| Trading assets \| Subprime
Firm sponsored mortgage and other consumer securitization trusts [Abstract]
Interest in securitized assets in nonconsolidated VIEs	37	44
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	1,910	1,850
Nonconsolidated entities \| Residential mortgage \| Investment securities \| Subprime
Firm sponsored mortgage and other consumer securitization trusts [Abstract]
Interest in securitized assets in nonconsolidated VIEs	18	19
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	653	614
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	134,945	125,510
Interest in securitized assets in nonconsolidated VIEs	7,496	7,372
Nonconsolidated entities \| Commercial and other \| Trading assets
Firm sponsored mortgage and other consumer securitization trusts [Abstract]
Interest in securitized assets in nonconsolidated VIEs	638	530
Nonconsolidated entities \| Commercial and other \| Investment securities
Firm sponsored mortgage and other consumer securitization trusts [Abstract]
Interest in securitized assets in nonconsolidated VIEs	5,786	5,768
Nonconsolidated entities \| Commercial and other \| Other financial assets
Firm sponsored mortgage and other consumer securitization trusts [Abstract]
Interest in securitized assets in nonconsolidated VIEs	$ 1,072	$ 1,074

Firm-sponsored mortgage and other consumer securitization trusts.

No definition available.

Name:	jpm_FirmSponsoredMortgageAndOtherConsumerSecuritizationTrustsAbstract
Namespace Prefix:	jpm_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Percent of retained securitization interests rated A or better.

+ References

No definition available.

+ Details

Name:	jpm_PercentOfRetainedSecuritizationInterestsFairValueRatedOrBetter
Namespace Prefix:	jpm_
Data Type:	dtr-types1:percentItemType
Balance Type:	na
Period Type:	instant

- 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.

+ Details

Name:	jpm_SeniorSecuritiesPurchasedExcludedFromInterestsContinuedToBeHeldByTransferorFairValue
Namespace Prefix:	jpm_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- 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.

+ Details

Name:	jpm_SubordinatedSecuritiesPurchasedExcludedFromInterestsContinuedToBeHeldByTransferorFairValue
Namespace Prefix:	jpm_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- 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
-Topic 860
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Subparagraph (a)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481326/860-20-50-4

+ Details

Name:	us-gaap_ContinuingInvolvementWithTransferredFinancialAssetsPrincipalAmountOutstanding
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

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
-Topic 860
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Subparagraph (a)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481326/860-20-50-4

+ Details

Name:	us-gaap_DerecognizedAssetsSecuritizedOrAssetbackedFinancingArrangementAssetsAndAnyOtherFinancialAssetsManagedTogetherPrincipalAmountOutstanding
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

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

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 860
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Subparagraph (a)(3)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481326/860-20-50-4

+ Details

Name:	us-gaap_InterestsContinuedToBeHeldByTransferorFairValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

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

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2E
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2E

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

+ Details

Name:	us-gaap_RetainedInterestFairValueDisclosure
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of transferred financial assets in which the transferor has continuing involvement with the assets underlying the transaction that continue to be recognized in the statement of financial position. 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
-Topic 860
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Subparagraph (a)(3)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481326/860-20-50-4

+ Details

Name:	us-gaap_SecuritizedAssetsAndAnyOtherFinancialAssetsManagedTogetherPrincipalAmountOutstanding
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=jpm_CommercialAndInvestmentBankMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_UnderlyingAssetClassAxis=us-gaap_ResidentialMortgageBackedSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ExternalCreditRatingByGroupingAxis=us-gaap_ExternalCreditRatingInvestmentGradeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ExternalCreditRatingByGroupingAxis=us-gaap_ExternalCreditRatingNonInvestmentGradeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_InternalCreditAssessmentAxis=us-gaap_PrimeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_InternalCreditAssessmentAxis=us-gaap_SubprimeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_UnderlyingAssetClassAxis=us-gaap_CommercialMortgageBackedSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_QualitativeAndQuantitativeInformationTransferorsContinuingInvolvementTransferredFinancialAssetsByTransferOrTransfereeAxis=us-gaap_VariableInterestEntityPrimaryBeneficiaryMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_QualitativeAndQuantitativeInformationTransferorsContinuingInvolvementTransferredFinancialAssetsByTransferOrTransfereeAxis=us-gaap_VariableInterestEntityNotPrimaryBeneficiaryMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_InvestmentTypeAxis=jpm_DebtSecuritiesTradingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_InvestmentTypeAxis=us-gaap_DebtSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_InvestmentTypeAxis=jpm_OtherFinancialAssetsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: