Derivative Instruments - Credit Derivatives, Protection Sold, Notional and Fair Value (Details) - USD ($) $ in Millions	Jun. 30, 2025	Dec. 31, 2024
Protection sold credit derivatives ratings/maturity profile
Protection sold credit derivatives ratings/maturity profile - less than 1 year	$ (289,838)	$ (178,099)
Protection sold credit derivatives ratings/maturity profile - from 1-5 years	(391,411)	(347,577)
Protection sold credit derivatives ratings/maturity profile - more than 5 years	(40,531)	(35,421)
Total notional amount	(721,780)	(561,097)
Credit Derivatives, Protection Sold
Protection sold credit derivatives ratings/maturity profile
Fair value of receivables	7,684	6,482
Fair value of payables	(3,239)	(2,642)
Net fair value	4,445	3,840
Investment-grade
Protection sold credit derivatives ratings/maturity profile
Protection sold credit derivatives ratings/maturity profile - less than 1 year	(231,800)	(135,950)
Protection sold credit derivatives ratings/maturity profile - from 1-5 years	(314,353)	(277,052)
Protection sold credit derivatives ratings/maturity profile - more than 5 years	(37,980)	(33,379)
Total notional amount	(584,133)	(446,381)
Investment-grade \| Credit Derivatives, Protection Sold
Protection sold credit derivatives ratings/maturity profile
Fair value of receivables	5,047	4,593
Fair value of payables	(1,065)	(904)
Net fair value	3,982	3,689
Noninvestment-grade
Protection sold credit derivatives ratings/maturity profile
Protection sold credit derivatives ratings/maturity profile - less than 1 year	(58,038)	(42,149)
Protection sold credit derivatives ratings/maturity profile - from 1-5 years	(77,058)	(70,525)
Protection sold credit derivatives ratings/maturity profile - more than 5 years	(2,551)	(2,042)
Total notional amount	(137,647)	(114,716)
Noninvestment-grade \| Credit Derivatives, Protection Sold
Protection sold credit derivatives ratings/maturity profile
Fair value of receivables	2,637	1,889
Fair value of payables	(2,174)	(1,738)
Net fair value	$ 463	$ 151

Protection sold credit derivativesratings(a)/maturity profile.

No definition available.

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

- Definition

Protection sold on credit derivatives and credit-related notes; ratings/maturity profile for maturities for more than five years.

+ References

No definition available.

+ Details

Name:	jpm_ProtectionSoldCreditDerivativesAndCreditRelatedNotesMoreThanFiveYears
Namespace Prefix:	jpm_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Protection sold on credit derivatives and credit-related notes; ratings/maturity profile for maturities from one to five years.

+ References

No definition available.

+ Details

Name:	jpm_ProtectionSoldCreditDerivativesAndCreditRelatedNotesRatingsFromOneToFiveYears
Namespace Prefix:	jpm_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Protection sold on credit derivatives and credit- related notes; ratings/maturity profile for maturities less than one year.

+ References

No definition available.

+ Details

Name:	jpm_ProtectionSoldCreditDerivativesAndCreditRelatedNotesRatingsLessThanOneYear
Namespace Prefix:	jpm_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Maximum potential amount of future undiscounted payments that could be required under the credit derivative, before reduction for potential recoveries under recourse or collateralization provisions.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4K
-Subparagraph (b)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-4K

+ Details

Name:	us-gaap_CreditDerivativeMaximumExposureUndiscounted
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Fair value of credit risk derivative asset.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4K
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-4K

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4A
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-4A

+ Details

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

- Definition

Fair value of credit risk derivative liability.

+ References

+ Details

Name:	us-gaap_CreditRiskDerivativeLiabilitiesAtFairValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Fair value of credit risk derivative asset after deduction of credit risk derivative liability.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4K
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-4K

+ Details

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

- Details

Name:	us-gaap_CreditDerivativesByContractTypeAxis=jpm_CreditDerivativesProtectionSoldMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

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