Fair Value Measurement - Impact of Credit Adjustments (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Credit and funding adjustments:
Derivatives CVA	$ 37	$ (17)	$ (80)	$ 3
Derivatives FVA	$ 18	$ (5)	$ (41)	$ 32

For debit valuation adjustments ("DVA") and funding valuation adjustments ("FVA"), amount of increase (decrease) in the fair value of derivatives recognized in the income statement.

No definition available.

Name:	jpm_DerivativeGainLossonDerivativeNetDVAandFVA
Namespace Prefix:	jpm_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration