Regulatory Capital (Details) $ in Millions	Sep. 30, 2024 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2021 USD ($)
Cumulative effect of change in accounting principles
Regulatory capital, assets and risk based ratios - supplemental information
Capital transition provisions, CECL capital benefit recognized			$ 2,900
Capital transition provisions, CECL capital benefit recognized, excluding amount phased out	$ 720	$ 1,400
JPMorgan Chase & Co.
Leverage-based capital metrics:
Adjusted average assets	$ 4,122,332	$ 3,831,200
Tier 1 leverage ratio	0.071	0.072
Total leverage exposure	$ 4,893,662	$ 4,540,465
SLR	0.060	0.061
Basel III Standardized | JPMorgan Chase & Co.
Risk-based capital metrics:
CET1 capital	$ 272,964	$ 250,585
Tier 1 capital	292,333	277,306
Total capital	324,585	308,497
Risk-weighted assets	$ 1,782,722	$ 1,671,995
CET1 capital ratio	15.30%	15.00%
Tier 1 capital ratio	0.164	0.166
Total capital ratio	0.182	0.185
Basel III Advanced | JPMorgan Chase & Co.
Risk-based capital metrics:
CET1 capital	$ 272,964	$ 250,585
Tier 1 capital	292,333	277,306
Total capital	310,764	295,417
Risk-weighted assets	$ 1,762,991	$ 1,669,156
CET1 capital ratio	15.50%	15.00%
Tier 1 capital ratio	0.166	0.166
Total capital ratio	0.176	0.177
BHC | Basel III
Well capitalized risk-based ratios
Tier 1 capital	0.060	0.060
Total capital	0.100	0.100
Minimum leverage-based capital ratios
Tier 1 leverage	0.040	0.040
SLR	5.00%	5.00%
Regulatory capital, assets and risk based ratios - supplemental information
GSIB surcharge	4.50%
Countercyclical buffer	0
SLR, minimum requirement	0.030	0.030
SLR, supplementary leverage buffer requirements	2.00%	2.00%
BHC | Basel III Standardized
Minimum risk-based capital ratios
CET1 capital	0.119	0.114
Tier 1 capital	0.134	0.129
Total capital	0.154	0.149
Regulatory capital, assets and risk based ratios - supplemental information
Stress capital buffer	2.90%
BHC | Basel III Advanced
Minimum risk-based capital ratios
CET1 capital	0.115	0.110
Tier 1 capital	0.130	0.125
Total capital	0.150	0.145
Regulatory capital, assets and risk based ratios - supplemental information
Capital conservation buffer requirement	2.50%
IDI | Basel III
Well capitalized risk-based ratios
CET1 capital	0.065	0.065
Tier 1 capital	0.080	0.080
Total capital	0.100	0.100
Minimum leverage-based capital ratios
Tier 1 leverage	0.040	0.040
SLR	6.00%	6.00%
Well capitalized leverage-based capital ratios
Tier 1 leverage	0.050	0.050
SLR	0.060	0.060
Regulatory capital, assets and risk based ratios - supplemental information
Capital conservation buffer requirement	2.50%	2.50%
SLR, minimum requirement	0.030	0.030
SLR, supplementary leverage buffer requirements	3.00%	3.00%
IDI | Basel III Standardized
Minimum risk-based capital ratios
CET1 capital	0.070	0.070
Tier 1 capital	0.085	0.085
Total capital	0.105	0.105
IDI | Basel III Advanced
Minimum risk-based capital ratios
CET1 capital	0.070	0.070
Tier 1 capital	0.085	0.085
Total capital	0.105	0.105
JPMorgan Chase Bank, N.A.
Leverage-based capital metrics:
Adjusted average assets	$ 3,471,044	$ 3,337,842
Tier 1 leverage ratio	0.080	0.079
Total leverage exposure	$ 4,239,056	$ 4,038,739
SLR	0.066	0.065
JPMorgan Chase Bank, N.A. | Basel III Standardized
Risk-based capital metrics:
CET1 capital	$ 278,980	$ 262,030
Tier 1 capital	278,985	262,032
Total capital	299,439	281,308
Risk-weighted assets	$ 1,724,917	$ 1,621,789
CET1 capital ratio	16.20%	16.20%
Tier 1 capital ratio	0.162	0.162
Total capital ratio	0.174	0.173
JPMorgan Chase Bank, N.A. | Basel III Advanced
Risk-based capital metrics:
CET1 capital	$ 278,980	$ 262,030
Tier 1 capital	278,985	262,032
Total capital	285,715	268,392
Risk-weighted assets	$ 1,602,273	$ 1,526,952
CET1 capital ratio	17.40%	17.20%
Tier 1 capital ratio	0.174	0.172
Total capital ratio	0.178	0.176