Litigation (Details)	1 Months Ended	3 Months Ended		36 Months Ended
	Aug. 31, 2021 USD ($)	Mar. 31, 2026 USD ($)	Mar. 31, 2025 USD ($)	Dec. 31, 2012 fund
Loss Contingencies [Line Items]
Legal expense		$ 223,000,000	$ 121,000,000
Threatened or Pending Litigation | Minimum
Loss Contingencies [Line Items]
Loss contingency range of possible loss		0
Threatened or Pending Litigation | Maximum
Loss Contingencies [Line Items]
Loss contingency range of possible loss		$ 1,300,000,000
Amrapali Litigation | JPMorgan India Private Limited
Loss Contingencies [Line Items]
Number of offshore funds formerly managed by JPMorgan Chase entities | fund				2
Amount of claim	$ 31,500,000
Foreign Exchange Investigations and Litigation
Loss Contingencies [Line Items]
Loss contingency disqualification period		10 years
Interchange Litigation
Loss Contingencies [Line Items]
Settlements with merchants who opted out, percentage of combined card sales volume (over)		90.00%
Russian Litigation
Loss Contingencies [Line Items]
Amount of claim		$ 439,000,000