Regulatory Capital (Details) - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018
Basel III Standardized Fully Phased-In \| JPMorgan Chase & Co.
Regulatory capital
CET1 capital	$ 188,151
Tier 1 capital	214,831
Total capital	243,500
Assets
Risk-weighted	1,527,762
Adjusted average	$ 2,717,852
Capital ratios
CET1	12.30%
Tier 1	14.10%
Total	15.90%
Tier 1 leverage	7.90%
Basel III Advanced Fully Phased-In \| JPMorgan Chase & Co.
Regulatory capital
CET1 capital	$ 188,151
Tier 1 capital	214,831
Total capital	233,203
Assets
Risk-weighted	1,435,693
Adjusted average	$ 2,717,852
Capital ratios
CET1	13.10%
Tier 1	15.00%
Total	16.20%
Tier 1 leverage	7.90%
Total leverage exposure	$ 3,404,535	$ 3,269,988
SLR	6.30%	6.40%
Basel III Standardized Transitional \| JPMorgan Chase & Co.
Regulatory capital
CET1 capital		$ 183,474
Tier 1 capital		209,093
Total capital		237,511
Assets
Risk-weighted		1,528,916
Adjusted average		$ 2,589,887
Capital ratios
CET1		12.00%
Tier 1		13.70%
Total		15.50%
Tier 1 leverage		8.10%
Basel III Advanced Transitional \| JPMorgan Chase & Co.
Regulatory capital
CET1 capital		$ 183,474
Tier 1 capital		209,093
Total capital		227,435
Assets
Risk-weighted		1,421,205
Adjusted average		$ 2,589,887
Capital ratios
CET1		12.90%
Tier 1		14.70%
Total		16.00%
Tier 1 leverage		8.10%
Bank Holding Companies \| Basel III
Minimum capital ratios
CET1	10.50%	9.00%
Tier 1	12.00%	10.50%
Total	14.00%	12.50%
Tier 1 leverage	4.00%	4.00%
SLR	5.00%
Well-capitalized ratios
Tier 1	6.00%
Total	10.00%
Adjustments to Capital for Deferred Tax Liabilities [Abstract]
Capital conservation buffer	2.50%
GSIB surcharge	3.50%
SLR, minimum requirement	3.00%
SLR, supplementary leverage buffer	2.00%
Insured Depository Institutions \| Basel III
Minimum capital ratios
CET1	7.00%	6.375%
Tier 1	8.50%	7.875%
Total	10.50%	9.875%
Tier 1 leverage	4.00%	4.00%
SLR	6.00%
Well-capitalized ratios
CET1	6.50%
Tier 1	8.00%
Total	10.00%
Tier 1 leverage	5.00%
SLR	6.00%
Adjustments to Capital for Deferred Tax Liabilities [Abstract]
Capital conservation buffer	2.50%
SLR, minimum requirement	3.00%
SLR, supplementary leverage buffer	3.00%
JPMorgan Chase Bank, N.A. \| Basel III Standardized Fully Phased-In
Regulatory capital
CET1 capital	$ 205,347
Tier 1 capital	205,347
Total capital	223,038
Assets
Risk-weighted	1,445,648
Adjusted average	$ 2,339,858
Capital ratios
CET1	14.20%
Tier 1	14.20%
Total	15.40%
Tier 1 leverage	8.80%
JPMorgan Chase Bank, N.A. \| Basel III Advanced Fully Phased-In
Regulatory capital
CET1 capital	$ 205,347
Tier 1 capital	205,347
Total capital	212,919
Assets
Risk-weighted	1,302,749
Adjusted average	$ 2,339,858
Capital ratios
CET1	15.80%
Tier 1	15.80%
Total	16.30%
Tier 1 leverage	8.80%
Total leverage exposure	$ 3,007,280	$ 2,915,541
SLR	6.80%	7.30%
JPMorgan Chase Bank, N.A. \| Basel III Standardized Transitional
Regulatory capital
CET1 capital		$ 211,671
Tier 1 capital		211,671
Total capital		229,952
Assets
Risk-weighted		1,446,529
Adjusted average		$ 2,250,480
Capital ratios
CET1		14.60%
Tier 1		14.60%
Total		15.90%
Tier 1 leverage		9.40%
JPMorgan Chase Bank, N.A. \| Basel III Advanced Transitional
Regulatory capital
CET1 capital		$ 211,671
Tier 1 capital		211,671
Total capital		220,025
Assets
Risk-weighted		1,283,146
Adjusted average		$ 2,250,480
Capital ratios
CET1		16.50%
Tier 1		16.50%
Total		17.10%
Tier 1 leverage		9.40%

Adjusted average assets, as calculated in accordance with U.S. federal regulatory capital standards.

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