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Loans - Narrative (Details)	9 Months Ended
Loans - Narrative (Details)	Sep. 30, 2025 loan_segment
Receivables [Abstract]
Number of portfolio segments	3

X

- Definition

Number Of Loan Portfolio Segments

+ References

No definition available.

+ Details

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

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- References

No definition available.

+ Details

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