Amortized cost excluding accrued interest, of financing receivable with payment default in current period and modified within previous 12 months preceding payment default for debtor experiencing financial difficulty.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 44
-Subparagraph (a)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481962/310-10-50-44

+ Details

Name:	us-gaap_FinancingReceivableExcludingAccruedInterestModifiedSubsequentDefault
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 12A
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481933/310-10-55-12A

Reference 2: http://fasb.org/us-gaap/role/ref/otherTransitionRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 34
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481962/310-10-50-34

Reference 3: http://fasb.org/us-gaap/role/ref/otherTransitionRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 33
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481962/310-10-50-33

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 42
-Subparagraph (a)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481962/310-10-50-42

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 42
-Subparagraph (a)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481962/310-10-50-42

+ Details

Name:	us-gaap_FinancingReceivableModificationsLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of commitment to lend additional funds to debtor experiencing financial difficulty for which creditor has modified terms of financing receivable.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef
-Topic 310
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481746/310-40-50-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 36
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481962/310-10-50-36

+ Details

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

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_CommercialPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_EquitySecuritiesByIndustryAxis=us-gaap_RealEstateSectorMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LoanRestructuringModificationAxis=us-gaap_ExtendedMaturityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LoanRestructuringModificationAxis=us-gaap_PaymentDeferralMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LoanRestructuringModificationAxis=jpm_ExtendedMaturityAndPaymentDeferralMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LoanRestructuringModificationAxis=us-gaap_ExtendedMaturityAndInterestRateReductionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_EquitySecuritiesByIndustryAxis=us-gaap_CommercialAndIndustrialSectorMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_EquitySecuritiesByIndustryAxis=jpm_WholesaleOtherMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Loans - Wholesale Loan Portfolio, Defaults of FDMs (Details) - Wholesale - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024	Dec. 31, 2024
Secured by real estate
Financing Receivable, Modified [Line Items]
FDM's that defaulted	$ 21,000,000	$ 4,000,000	$ 21,000,000	$ 9,000,000
Secured by real estate \| Term extension
Financing Receivable, Modified [Line Items]
FDM's that defaulted	21,000,000	1,000,000	21,000,000	6,000,000
Secured by real estate \| Other-than-insignificant payment deferral
Financing Receivable, Modified [Line Items]
FDM's that defaulted	0	0	0	0
Secured by real estate \| Other-than-insignificant payment deferral and term extension
Financing Receivable, Modified [Line Items]
FDM's that defaulted		0		0
Secured by real estate \| Interest rate reduction and term extension
Financing Receivable, Modified [Line Items]
FDM's that defaulted	0	3,000,000	0	3,000,000
Commercial and industrial
Financing Receivable, Modified [Line Items]
FDM's that defaulted	44,000,000	154,000,000	57,000,000	156,000,000
Commitments to lend to borrowers experiencing financial difficulty	1,900,000,000		1,900,000,000		$ 1,800,000,000
Commercial and industrial \| Term extension
Financing Receivable, Modified [Line Items]
FDM's that defaulted	40,000,000	110,000,000	49,000,000	111,000,000
Commercial and industrial \| Other-than-insignificant payment deferral
Financing Receivable, Modified [Line Items]
FDM's that defaulted	4,000,000	23,000,000	4,000,000	23,000,000
Commercial and industrial \| Other-than-insignificant payment deferral and term extension
Financing Receivable, Modified [Line Items]
FDM's that defaulted		20,000,000		20,000,000
Commercial and industrial \| Interest rate reduction and term extension
Financing Receivable, Modified [Line Items]
FDM's that defaulted	0	1,000,000	4,000,000	2,000,000
Other
Financing Receivable, Modified [Line Items]
FDM's that defaulted	4,000,000	9,000,000	12,000,000	11,000,000
Commitments to lend to borrowers experiencing financial difficulty	0		0		$ 69,000,000
Other \| Term extension
Financing Receivable, Modified [Line Items]
FDM's that defaulted	4,000,000	9,000,000	12,000,000	11,000,000
Other \| Other-than-insignificant payment deferral
Financing Receivable, Modified [Line Items]
FDM's that defaulted	0	0	0	0
Other \| Other-than-insignificant payment deferral and term extension
Financing Receivable, Modified [Line Items]
FDM's that defaulted		0		0
Other \| Interest rate reduction and term extension
Financing Receivable, Modified [Line Items]
FDM's that defaulted	$ 0	$ 0	$ 0	$ 0