Loans - Consumer, Excluding Credit Card Loan Portfolio, Auto and Other (Details) - USD ($) $ in Millions	6 Months Ended	12 Months Ended
Jun. 30, 2025	Jun. 30, 2024	Dec. 31, 2024
Loans by origination year
Total retained loans	$ 1,345,473	$ 1,273,047	$ 1,299,590
Gross charge-offs by origination year
Total gross charge-offs	5,760	5,107
Consumer, excluding credit card
Loans by origination year
Total retained loans	371,855	382,795	376,334
Gross charge-offs by origination year
Total gross charge-offs	540	$ 661
Consumer, excluding credit card \| Auto and other
Loans by origination year
Term loans originated in 2025/2024	14,721		26,356
Term loans originated in 2024/2023	21,399		16,237
Term loans originated in 2023/2022	12,714		9,460
Term loans originated in 2022/2021	7,101		7,198
Term loans originated in 2021/2020	4,903		2,954
Term loans originated prior to 2021/2020	1,923		647
Revolving loans within the revolving period	3,789		3,757
Revolving loans converted to term loans	244		212
Total retained loans	$ 66,794		$ 66,821
% of 30+ days past due to total retained loans by origination year
% of 30 plus days past due to total retained loans, Term loans originated in 2025/2024	0.57%		0.72%
% of 30 plus days past due to total retained loans, Term loans originated in 2024/2023	0.79%		1.75%
% of 30 plus days past due to total retained loans, Term loans originated in 2023/2022	1.88%		2.74%
% of 30 plus days past due to total retained loans, Term loans originated in 2022/2021	2.89%		2.50%
% of 30 plus days past due to total retained loans, Term loans originated in 2021/2020	2.57%		1.76%
% of 30 plus days past due to total retained loans, Term loans originated prior to 2021/2020	2.13%		3.55%
% of 30 plus days past due to total retained loans, Revolving loans within the revolving period	0.98%		1.14%
% of 30 plus days past due to total retained loans, Revolving loans converted to term loans	29.10%		30.19%
% of 30 plus days past due to total retained loans	1.46%		1.64%
Gross charge-offs by origination year
Gross charge-offs originated in 2025/2024	$ 76		$ 269
Gross charge-offs originated in 2024/2023	130		348
Gross charge-offs originated in 2023/2022	131		224
Gross charge-offs originated in 2022/2021	86		126
Gross charge-offs originated in 2021/2020	40		37
Gross charge-offs originated prior to 2021/2020	48		82
Gross charge-offs originated within the revolving period	0		1
Gross charge-offs originated converted to term loans	3		6
Total gross charge-offs	514		1,093
Current \| Consumer, excluding credit card \| Auto and other
Loans by origination year
Term loans originated in 2025/2024	14,637		26,165
Term loans originated in 2024/2023	21,230		15,953
Term loans originated in 2023/2022	12,475		9,201
Term loans originated in 2022/2021	6,896		7,014
Term loans originated in 2021/2020	4,776		2,895
Term loans originated prior to 2021/2020	1,880		624
Revolving loans within the revolving period	3,752		3,714
Revolving loans converted to term loans	173		148
Total retained loans	65,819		65,714
30–119 days past due \| Consumer, excluding credit card \| Auto and other
Loans by origination year
Term loans originated in 2025/2024	84		190
Term loans originated in 2024/2023	168		283
Term loans originated in 2023/2022	237		259
Term loans originated in 2022/2021	205		179
Term loans originated in 2021/2020	126		53
Term loans originated prior to 2021/2020	40		23
Revolving loans within the revolving period	33		40
Revolving loans converted to term loans	39		34
Total retained loans	932		1,061
120 or more days past due \| Consumer, excluding credit card \| Auto and other
Loans by origination year
Term loans originated in 2025/2024	0		1
Term loans originated in 2024/2023	1		1
Term loans originated in 2023/2022	2		0
Term loans originated in 2022/2021	0		5
Term loans originated in 2021/2020	1		6
Term loans originated prior to 2021/2020	3		0
Revolving loans within the revolving period	4		3
Revolving loans converted to term loans	32		30
Total retained loans	$ 43		$ 46

This item represents the percentage of loans 30 plus days past due as compared to total retained loans.

No definition available.

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

- Definition

Percentage Of Loans Thirty Plus Days Past Due To Total Retained Loans, By Origination Year

+ References

No definition available.

+ Details

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

- Definition

Percentage Of Loans Thirty Plus Days Past Due To Total Retained Loans, Financing Receivable, Converted To Term Loan

+ References

No definition available.

+ Details

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

- Definition

Percentage Of Loans Thirty Plus Days Past Due To Total Retained Loans, Financing Receivable, Revolving

+ References

No definition available.

+ Details

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

- Definition

Percentage Of Loans Thirty Plus Days Past Due To Total Retained Loans, Originated Five Or More Years Before Latest Fiscal Year

+ References

No definition available.

+ Details

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

- Definition

Percentage Of Loans Thirty Plus Days Past Due To Total Retained Loans, Originated Four Years Before Latest Fiscal Year

+ References

No definition available.

+ Details

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

- Definition

Percentage Of Loans Thirty Plus Days Past Due To Total Retained Loans, Originated In Current Fiscal Year

+ References

No definition available.

+ Details

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

- Definition

Percentage Of Loans Thirty Plus Days Past Due To Total Retained Loans, Originated In Fiscal Year Before Latest Fiscal Year

+ References

No definition available.

+ Details

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

- Definition

Percentage Of Loans Thirty Plus Days Past Due To Total Retained Loans, Originated Three Years Before Latest Fiscal Year

+ References

No definition available.

+ Details

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

- Definition

Percentage Of Loans Thirty Plus Days Past Due To Total Retained Loans, Originated Two Years Before Latest Fiscal Year

+ References

No definition available.

+ Details

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

- Definition

Amount, excluding accrued interest, of decrease in allowance for credit loss on financing receivable from writeoff. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-13

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-6

+ Details

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

- References

No definition available.

+ Details

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

- Definition

Amortized cost excluding accrued interest, before allowance for credit loss, of financing receivable. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479344/326-20-45-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 3B
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-3B

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-5

+ Details

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

- References

No definition available.

+ Details

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

- Definition

Amortized cost excluding accrued interest, of financing receivable originated more than five years prior to current fiscal year. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 79
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479294/326-20-55-79

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-6

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 3B
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-3B

+ Details

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

- Definition

Amount, excluding accrued interest, of writeoff of financing receivable originated more than five years before current fiscal year. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-6

+ Details

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

- Definition

Amortized cost excluding accrued interest, of financing receivable that can be withdrawn, repaid, and redrawn.

+ References

+ Details

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

- Definition

Amortized cost excluding accrued interest, of revolving financing receivable converted to term loan.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 79
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479294/326-20-55-79

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 6A
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-6A

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 3B
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-3B

+ Details

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

- Definition

Amount, excluding accrued interest, of writeoff of revolving financing receivable converted to term loan.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 6A
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-6A

+ Details

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

- Definition

Amount, excluding accrued interest, of writeoff of financing receivable that can be withdrawn, repaid, and redrawn.

+ References

+ Details

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

- Definition

Amortized cost excluding accrued interest, of financing receivable originated four years prior to current fiscal year. Excludes net investment in lease.

+ References

+ Details

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

- Definition

Amount, excluding accrued interest, of writeoff of financing receivable originated four years before current fiscal year. Excludes net investment in lease.

+ References

+ Details

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

- Definition

Amortized cost excluding accrued interest, of financing receivable originated three years prior to current fiscal year. Excludes net investment in lease.

+ References

+ Details

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

- Definition

Amount, excluding accrued interest, of writeoff of financing receivable originated three years before current fiscal year. Excludes net investment in lease.

+ References

+ Details

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

- Definition

Amortized cost excluding accrued interest, of financing receivable originated in current fiscal year. Excludes net investment in lease.

+ References

+ Details

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

- Definition

Amount, excluding accrued interest, of writeoff of financing receivable originated in current fiscal year. Excludes net investment in lease.

+ References

+ Details

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

- Definition

Amortized cost excluding accrued interest, of financing receivable originated two years prior to current fiscal year. Excludes net investment in lease.

+ References

+ Details

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

- Definition

Amount, excluding accrued interest, of writeoff of financing receivable originated two years before current fiscal year. Excludes net investment in lease.

+ References

+ Details

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

- Definition

Amortized cost excluding accrued interest of financing receivable originated in fiscal year prior to current fiscal year. Excludes net investment in lease.

+ References

+ Details

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

- Definition

Amount, excluding accrued interest, of writeoff of financing receivable originated in fiscal year before current fiscal year. Excludes net investment in lease.

+ References

+ Details

Name:	us-gaap_FinancingReceivableExcludingAccruedInterestYearTwoOriginatedFiscalYearBeforeCurrentFiscalYearWriteoff
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_AutomobileLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivablesPeriodPastDueAxis=jpm_FinancialAssetCurrentandLessThan30DaysPastDueandStillAccruingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivablesPeriodPastDueAxis=jpm_FinancialAsset30to119DaysPastDueMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivablesPeriodPastDueAxis=jpm_FinancialAssetEqualToOrGreaterThan120DaysPastDueMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: