Regulatory Capital - Leverage-Based Regulatory Requirements (Details) - Well-capitalized ratios	Jun. 30, 2025	Dec. 31, 2024
BHC
Minimum leverage-based capital ratios
Tier 1 leverage	0.040	0.040
SLR	5.00%	5.00%
Well capitalized leverage-based capital ratios
SLR, minimum requirement	0.030	0.030
SLR, supplementary leverage buffer requirements	2.00%	2.00%
IDI
Minimum leverage-based capital ratios
Tier 1 leverage	0.040	0.040
SLR	6.00%	6.00%
Well capitalized leverage-based capital ratios
Tier 1 leverage	0.050	0.050
SLR	0.060	0.060
SLR, minimum requirement	0.030	0.030
SLR, supplementary leverage buffer requirements	3.00%	3.00%

Leverage -based Capital Ratios

No definition available.

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

- Definition

Supplementary Leverage Ratio Required For Capital Adequacy To Average Assets

+ References

No definition available.

+ Details

Name:	jpm_SupplementaryLeverageRatioRequiredForCapitalAdequacyToAverageAssets
Namespace Prefix:	jpm_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Supplementary Leverage Ratio Required For Capital Adequacy To Average Assets, Supplementary Leverage Buffer

+ References

No definition available.

+ Details

Name:	jpm_SupplementaryLeverageRatioRequiredForCapitalAdequacyToAverageAssetsSupplementaryLeverageBuffer
Namespace Prefix:	jpm_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Well Capitalized Leverage Ratios

+ References

No definition available.

+ Details

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

- Definition

Ratio of minimum Tier 1 risk-based capital to total leverage exposure required for capital adequacy as defined by regulatory framework.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 505
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (c)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477270/942-505-50-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 505
-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477270/942-505-50-1B

+ Details

Name:	us-gaap_BankingRegulationSupplementaryLeverageRatioCapitalAdequacyMinimum
Namespace Prefix:	us-gaap_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

- Definition

Ratio of minimum Tier 1 risk-based capital to total leverage exposure categorized as well capitalized as defined by regulatory framework for prompt corrective action.

+ References

+ Details

Name:	us-gaap_BankingRegulationSupplementaryLeverageRatioWellCapitalizedMinimum
Namespace Prefix:	us-gaap_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

- Definition

Ratio of minimum Tier 1 leverage capital to average assets required for capital adequacy as defined by regulatory framework.

+ References

+ Details

Name:	us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets
Namespace Prefix:	us-gaap_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

- Definition

Ratio of minimum Tier 1 leverage capital to average assets categorized as well capitalized as defined by regulatory framework for prompt corrective action.

+ References

+ Details

Name:	us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalizedToAverageAssets
Namespace Prefix:	us-gaap_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	us-gaap_RiskWeightedAssetsCalculationMethodologyAxis=jpm_BaselIIIMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=jpm_BankHoldingCompaniesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=jpm_SubsidiariesInsuredDepositoryInstitutionsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: