Loans - Consumer, Excluding Credit Card Loan Portfolio, Loan Modifications, Nature and Extent of Modifications (Details) - Consumer, excluding credit card - Residential real estate $ in Millions	12 Months Ended
Dec. 31, 2022 USD ($) loan	Dec. 31, 2021 USD ($) loan	Dec. 31, 2020 USD ($) loan
Financing Receivable, Impaired [Line Items]
New TDRs \| $	$ 362	$ 866	$ 819
Percentage, sum of items by type, may exceed	100.00%
Trial Modification
Financing Receivable, Impaired [Line Items]
Number of loans modified	3,902	6,246	5,522
Permanent Modification
Financing Receivable, Impaired [Line Items]
Number of loans modified	4,182	4,588	6,850
Interest rate reduction
Financing Receivable, Impaired [Line Items]
Concession granted	54.00%	74.00%	50.00%
Term or payment extension
Financing Receivable, Impaired [Line Items]
Concession granted	67.00%	53.00%	49.00%
Principal and/or interest deferred
Financing Receivable, Impaired [Line Items]
Concession granted	10.00%	23.00%	14.00%
Principal forgiveness
Financing Receivable, Impaired [Line Items]
Concession granted	1.00%	2.00%	2.00%
Other
Financing Receivable, Impaired [Line Items]
Concession granted	37.00%	36.00%	66.00%

Financing Receivable, Modifications, Percentage of Modifications

No definition available.

Name:	jpm_FinancingReceivableModificationsPercentageofModifications
Namespace Prefix:	jpm_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

In a group of items by type, the percentage that the sum of the items may exceed due to the inclusion of some items in more than one category. For example, in loan modifications, some loans may have more than one type of concession granted on the loan, so a sum of all types of loan modifications granted would exceed 100%.

+ References

No definition available.

+ Details

Name:	jpm_PercentageSumOfItemsByTypeMayExceed
Namespace Prefix:	jpm_
Data Type:	dtr-types:percentItemType
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_FinancingReceivableImpairedLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of financing receivables that have been modified by troubled debt restructurings.

+ 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_FinancingReceivableModificationsNumberOfContracts2
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount, after troubled debt restructuring, of modified financing receivable.

+ References

+ Details

Name:	us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

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

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_ResidentialRealEstateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

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

- Details

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

- Details

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

- Details

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