Regulatory Capital (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
Basel III
Capital ratios
CET1 - Minimum capital ratios	4.50%
CET1 - Well-capitalized ratios	6.50%
Tier 1 capital - Minimum capital ratio	6.00%
Tier 1 capital - Well capitalized ratio	8.00%
Total capital - Minumum capital ratio	8.00%
Total capital - Well-capitalized ratio	10.00%
Tier 1 leverage - Minimum capital ratio	4.00%
Tier 1 leverage - Well-capitalized ratio	5.00%
Adjustments to Capital for Deferred Tax Liabilities [Abstract]
Adjustments to capital for deferred tax liabilities resulting from nontaxable business combinations	$ 125,000,000	$ 130,000,000
Adjustments to capital for deferred tax liabilities resulting from tax-deductible goodwill	2,700,000,000	2,700,000,000
JPMorgan Chase & Co. \| Basel III
Regulatory capital, assets and risk based ratios - supplemental information [Abstract]
Trust preferred securities included in Basel III Tier I capital	960,000,000
JPMorgan Chase & Co. \| Basel III Standardized Transitional
Regulatory capital
CET1 capital	167,142,000,000	164,426,000,000
Tier 1 capital	188,791,000,000	186,294,000,000
Total capital	223,256,000,000	221,225,000,000
Assets
Risk-weighted assets	1,536,688,000,000	1,472,602,000,000
Adjusted average assets	2,510,897,000,000	2,465,414,000,000
Capital ratios
CET1	10.90%	11.20%
Tier 1 capital	12.30%	12.70%
Total capital	14.50%	15.00%
Tier 1 leverage	7.50%	7.60%
JPMorgan Chase & Co. \| Basel III Advanced Transitional
Regulatory capital
CET1 capital	167,142,000,000	164,426,000,000
Tier 1 capital	188,791,000,000	186,294,000,000
Total capital	213,366,000,000	210,684,000,000
Assets
Risk-weighted assets	1,562,570,000,000	1,608,240,000,000
Adjusted average assets	2,510,897,000,000	2,465,414,000,000
Capital ratios
CET1	10.70%	10.20%
Tier 1 capital	12.10%	11.60%
Total capital	13.70%	13.10%
Tier 1 leverage	7.50%	7.60%
JPMorgan Chase Bank, N.A. \| Basel III
Regulatory capital, assets and risk based ratios - supplemental information [Abstract]
Trust preferred securities included in Basel III Tier I capital	150,000,000
JPMorgan Chase Bank, N.A. \| Basel III Standardized Transitional
Regulatory capital
CET1 capital	161,912,000,000	156,567,000,000
Tier 1 capital	161,986,000,000	156,891,000,000
Total capital	178,185,000,000	173,328,000,000
Assets
Risk-weighted assets	1,275,482,000,000	1,230,358,000,000
Adjusted average assets	2,033,143,000,000	1,968,131,000,000
Capital ratios
CET1	12.70%	12.70%
Tier 1 capital	12.70%	12.80%
Total capital	14.00%	14.10%
Tier 1 leverage	8.00%	8.00%
JPMorgan Chase Bank, N.A. \| Basel III Advanced Transitional
Regulatory capital
CET1 capital	161,912,000,000	156,567,000,000
Tier 1 capital	161,986,000,000	156,891,000,000
Total capital	171,232,000,000	166,331,000,000
Assets
Risk-weighted assets	1,304,984,000,000	1,330,175,000,000
Adjusted average assets	2,033,143,000,000	1,968,131,000,000
Capital ratios
CET1	12.40%	11.80%
Tier 1 capital	12.40%	11.80%
Total capital	13.10%	12.50%
Tier 1 leverage	8.00%	8.00%
Chase Bank USA, N.A. \| Basel III
Regulatory capital, assets and risk based ratios - supplemental information [Abstract]
Trust preferred securities included in Basel III Tier I capital	0
Chase Bank USA, N.A. \| Basel III Standardized Transitional
Regulatory capital
CET1 capital	14,832,000,000	14,556,000,000
Tier 1 capital	14,832,000,000	14,556,000,000
Total capital	20,750,000,000	20,517,000,000
Assets
Risk-weighted assets	99,974,000,000	103,468,000,000
Adjusted average assets	125,782,000,000	128,111,000,000
Capital ratios
CET1	14.80%	14.10%
Tier 1 capital	14.80%	14.10%
Total capital	20.80%	19.80%
Tier 1 leverage	11.80%	11.40%
Chase Bank USA, N.A. \| Basel III Advanced Transitional
Regulatory capital
CET1 capital	14,832,000,000	14,556,000,000
Tier 1 capital	14,832,000,000	14,556,000,000
Total capital	19,482,000,000	19,206,000,000
Assets
Risk-weighted assets	156,300,000,000	157,565,000,000
Adjusted average assets	$ 125,782,000,000	$ 128,111,000,000
Capital ratios
CET1	9.50%	9.20%
Tier 1 capital	9.50%	9.20%
Total capital	12.50%	12.20%
Tier 1 leverage	11.80%	11.40%

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

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Adjustments to capital for deferred tax liabilities resulting from nontaxable business combinations.

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Adjustments to capital for deferred tax liabilities resulting from tax-deductible goodwill.

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Common Equity Tier 1 Capital as defined by the regulators.

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The minimum Common Equity Tier 1 capital ratio (Common Equity Tier 1 capital divided by risk-weighted assets) required for capital adequacy under the regulatory framework for prompt corrective action.

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Common Equity Tier 1 Capital Required to be Well Capitalized to Risk Weighted Assets

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Common Equity Tier 1 Capital divided by risk weighted assets as defined by regulations.

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Including the current and noncurrent portions, the carrying value of junior subordinated long-term debt owed to unconsolidated subsidiary trusts as of the balance sheet date included in Basel III Tier 1 Capital. Such debt places a lender in a lien position behind debt having a higher priority of repayment in liquidation of the entity's assets and was initially scheduled to be repaid after one year or beyond the normal operating cycle if longer.

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The amount of total capital as defined in the regulations.

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The minimum Total risk based capital ratio (total capital divided by risk weighted assets) required for capital adequacy purposes under the regulatory framework for prompt corrective action.

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The Total risk based capital ratio (total capital divided by risk weighted assets) required to be categorized as "well capitalized", in the regulatory framework for prompt corrective action.

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Total Capital divided by risk weighted assets as defined in the regulations.

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Amount of risk-weighted assets as calculated in accordance with U.S. Federal regulatory capital standards.

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The minimum amount of Tier 1 Leverage Capital for capital adequacy purposes divided by average assets as defined in the regulations.

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The amount of Tier 1 Leverage Capital required to be categorized as well capitalized divided by average assets as defined in the regulatory framework for prompt corrective action.

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Tier 1 Leverage Capital divided by average assets as defined in the regulations.

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Tier 1 Risk Based Capital as defined in the regulations.

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The minimum Tier One Capital Ratio (Tier one capital divided by risk-weighted assets) required for capital adequacy purposes under the regulatory framework for prompt corrective action.

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The Tier 1 capital ratio (Tier 1 capital divided by risk weighted assets) required to be categorized as "well capitalized" under the regulatory framework for prompt corrective action.

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Tier 1 capital divided by risk weighted assets as defined by regulations.

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