Loans - Credit Card Portfolio, Loan Modifications, Narrative (Details) - Credit card	3 Months Ended
Mar. 31, 2023 USD ($) loan_payment	Mar. 31, 2022 USD ($)
Financing Receivable, Troubled Debt Restructuring [Line Items]
Fixed payment plan period	60 months
Loans subject to a trial modification	$ 24,000,000
Amortized cost basis	$ 0	$ 9,000,000
Number of payments past due considered payment default for modified loans \| loan_payment	2

Financing Receivable, Modifications, Subsequent Default, Number of Payments Past Due

No definition available.

Name:	jpm_FinancingReceivableModificationsSubsequentDefaultNumberofPaymentsPastDue
Namespace Prefix:	jpm_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

The duration period for placing customers on a fixed payment plan as a result of a credit card loan modification program.

+ References

No definition available.

+ Details

Name:	jpm_LoanModificationProgramFixedPaymentPlanPeriod
Namespace Prefix:	jpm_
Data Type:	xbrli:durationItemType
Balance Type:	na
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

No definition available.

+ Details

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

- Definition

Amount of financing receivable modified as troubled debt restructuring within previous 12 months, with subsequent payment default.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 34
-Subparagraph (a)(2)
-URI https://asc.fasb.org/extlink&oid=123577603&loc=SL6953682-111524

+ Details

Name:	us-gaap_FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of financing receivable modified on trial basis.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
-URI https://asc.fasb.org/extlink&oid=123577603&loc=SL6953676-111524

+ Details

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

- Details

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