<?xml version="1.0" encoding="utf-8"?>
<xbrl
  xmlns="http://www.xbrl.org/2003/instance"
  xmlns:amj="http://imetrix.edgar-online.com/20210518"
  xmlns:dei="http://xbrl.sec.gov/dei/2019-01-31"
  xmlns:link="http://www.xbrl.org/2003/linkbase"
  xmlns:us-gaap="http://fasb.org/us-gaap/2019-01-31"
  xmlns:xbrldi="http://xbrl.org/2006/xbrldi"
  xmlns:xlink="http://www.w3.org/1999/xlink">
    <link:schemaRef xlink:href="amj-20210518.xsd" xlink:type="simple"/>
    <context id="duration_2021-05-18_to_2021-05-18">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000019617</identifier>
        </entity>
        <period>
            <startDate>2021-05-18</startDate>
            <endDate>2021-05-18</endDate>
        </period>
    </context>
    <context id="duration_2021-05-18_to_2021-05-18_us-gaap-StatementClassOfStockAxis_us-gaap-CommonStockMember">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000019617</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap:StatementClassOfStockAxis">us-gaap:CommonStockMember</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2021-05-18</startDate>
            <endDate>2021-05-18</endDate>
        </period>
    </context>
    <context id="duration_2021-05-18_to_2021-05-18_us-gaap-StatementClassOfStockAxis_amj-DepositarySharesEachRepresentingAOneFourHundredthInterestInAShareOf6.10NonCumulativePreferredStockSeriesAaMember">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000019617</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap:StatementClassOfStockAxis">amj:DepositarySharesEachRepresentingAOneFourHundredthInterestInAShareOf6.10NonCumulativePreferredStockSeriesAaMember</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2021-05-18</startDate>
            <endDate>2021-05-18</endDate>
        </period>
    </context>
    <context id="duration_2021-05-18_to_2021-05-18_us-gaap-StatementClassOfStockAxis_amj-DepositarySharesEachRepresentingAOneFourHundredthInterestInAShareOf6.15NonCumulativePreferredStockSeriesBbMember">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000019617</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap:StatementClassOfStockAxis">amj:DepositarySharesEachRepresentingAOneFourHundredthInterestInAShareOf6.15NonCumulativePreferredStockSeriesBbMember</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2021-05-18</startDate>
            <endDate>2021-05-18</endDate>
        </period>
    </context>
    <context id="duration_2021-05-18_to_2021-05-18_us-gaap-StatementClassOfStockAxis_amj-DepositarySharesEachRepresentingAOneFourHundredthInterestInAShareOf5.75NonCumulativePreferredStockSeriesDdMember">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000019617</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap:StatementClassOfStockAxis">amj:DepositarySharesEachRepresentingAOneFourHundredthInterestInAShareOf5.75NonCumulativePreferredStockSeriesDdMember</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2021-05-18</startDate>
            <endDate>2021-05-18</endDate>
        </period>
    </context>
    <context id="duration_2021-05-18_to_2021-05-18_us-gaap-StatementClassOfStockAxis_amj-DepositarySharesEachRepresentingAOneFourHundredthInterestInAShareOf6.00NonCumulativePreferredStockSeriesEeMember">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000019617</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap:StatementClassOfStockAxis">amj:DepositarySharesEachRepresentingAOneFourHundredthInterestInAShareOf6.00NonCumulativePreferredStockSeriesEeMember</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2021-05-18</startDate>
            <endDate>2021-05-18</endDate>
        </period>
    </context>
    <context id="duration_2021-05-18_to_2021-05-18_us-gaap-StatementClassOfStockAxis_amj-DepositarySharesEachRepresentingAOneFourHundredthInterestInAShareOf4.75NonCumulativePreferredStockSeriesGgMember">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000019617</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap:StatementClassOfStockAxis">amj:DepositarySharesEachRepresentingAOneFourHundredthInterestInAShareOf4.75NonCumulativePreferredStockSeriesGgMember</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2021-05-18</startDate>
            <endDate>2021-05-18</endDate>
        </period>
    </context>
    <context id="duration_2021-05-18_to_2021-05-18_us-gaap-StatementClassOfStockAxis_amj-DepositarySharesEachRepresentingAOneFourHundredthInterestInAShareOf4.55NonCumulativePreferredStockSeriesJjMember">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000019617</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap:StatementClassOfStockAxis">amj:DepositarySharesEachRepresentingAOneFourHundredthInterestInAShareOf4.55NonCumulativePreferredStockSeriesJjMember</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2021-05-18</startDate>
            <endDate>2021-05-18</endDate>
        </period>
    </context>
    <context id="duration_2021-05-18_to_2021-05-18_us-gaap-StatementClassOfStockAxis_amj-AlerianMlpIndexETNsDueMay160242024Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000019617</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap:StatementClassOfStockAxis">amj:AlerianMlpIndexETNsDueMay160242024Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2021-05-18</startDate>
            <endDate>2021-05-18</endDate>
        </period>
    </context>
    <context id="duration_2021-05-18_to_2021-05-18_us-gaap-StatementClassOfStockAxis_us-gaap-SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMember">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000019617</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap:StatementClassOfStockAxis">us-gaap:SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMember</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2021-05-18</startDate>
            <endDate>2021-05-18</endDate>
        </period>
    </context>
    <dei:EntityRegistrantName
      contextRef="duration_2021-05-18_to_2021-05-18"
      id="Hidden_dei_EntityRegistrantName">JPMORGAN CHASE &amp; CO</dei:EntityRegistrantName>
    <dei:AmendmentFlag contextRef="duration_2021-05-18_to_2021-05-18">false</dei:AmendmentFlag>
    <dei:EntityCentralIndexKey
      contextRef="duration_2021-05-18_to_2021-05-18"
      id="Hidden_dei_EntityCentralIndexKey">0000019617</dei:EntityCentralIndexKey>
    <dei:DocumentType contextRef="duration_2021-05-18_to_2021-05-18">8-K</dei:DocumentType>
    <dei:DocumentPeriodEndDate contextRef="duration_2021-05-18_to_2021-05-18">2021-05-18</dei:DocumentPeriodEndDate>
    <dei:EntityIncorporationStateCountryCode contextRef="duration_2021-05-18_to_2021-05-18">DE</dei:EntityIncorporationStateCountryCode>
    <dei:EntityFileNumber contextRef="duration_2021-05-18_to_2021-05-18">1-5805</dei:EntityFileNumber>
    <dei:EntityTaxIdentificationNumber contextRef="duration_2021-05-18_to_2021-05-18">13-2624428</dei:EntityTaxIdentificationNumber>
    <dei:EntityAddressAddressLine1 contextRef="duration_2021-05-18_to_2021-05-18">383 Madison Avenue</dei:EntityAddressAddressLine1>
    <dei:EntityAddressCityOrTown contextRef="duration_2021-05-18_to_2021-05-18">New York</dei:EntityAddressCityOrTown>
    <dei:EntityAddressStateOrProvince contextRef="duration_2021-05-18_to_2021-05-18">NY</dei:EntityAddressStateOrProvince>
    <dei:EntityAddressPostalZipCode contextRef="duration_2021-05-18_to_2021-05-18">10179</dei:EntityAddressPostalZipCode>
    <dei:CityAreaCode contextRef="duration_2021-05-18_to_2021-05-18">(212)</dei:CityAreaCode>
    <dei:LocalPhoneNumber contextRef="duration_2021-05-18_to_2021-05-18">270-6000</dei:LocalPhoneNumber>
    <dei:WrittenCommunications contextRef="duration_2021-05-18_to_2021-05-18">false</dei:WrittenCommunications>
    <dei:SolicitingMaterial contextRef="duration_2021-05-18_to_2021-05-18">false</dei:SolicitingMaterial>
    <dei:PreCommencementTenderOffer contextRef="duration_2021-05-18_to_2021-05-18">false</dei:PreCommencementTenderOffer>
    <dei:PreCommencementIssuerTenderOffer contextRef="duration_2021-05-18_to_2021-05-18">false</dei:PreCommencementIssuerTenderOffer>
    <dei:Security12bTitle contextRef="duration_2021-05-18_to_2021-05-18_us-gaap-StatementClassOfStockAxis_us-gaap-CommonStockMember">Common stock</dei:Security12bTitle>
    <dei:TradingSymbol contextRef="duration_2021-05-18_to_2021-05-18_us-gaap-StatementClassOfStockAxis_us-gaap-CommonStockMember">JPM</dei:TradingSymbol>
    <dei:SecurityExchangeName contextRef="duration_2021-05-18_to_2021-05-18_us-gaap-StatementClassOfStockAxis_us-gaap-CommonStockMember">NYSE</dei:SecurityExchangeName>
    <dei:Security12bTitle contextRef="duration_2021-05-18_to_2021-05-18_us-gaap-StatementClassOfStockAxis_amj-DepositarySharesEachRepresentingAOneFourHundredthInterestInAShareOf6.10NonCumulativePreferredStockSeriesAaMember">Depositary Shares, each representing a one-four hundredth interest in a share of 6.10% Non-Cumulative Preferred Stock, Series AA</dei:Security12bTitle>
    <dei:TradingSymbol contextRef="duration_2021-05-18_to_2021-05-18_us-gaap-StatementClassOfStockAxis_amj-DepositarySharesEachRepresentingAOneFourHundredthInterestInAShareOf6.10NonCumulativePreferredStockSeriesAaMember">JPM PR G</dei:TradingSymbol>
    <dei:SecurityExchangeName contextRef="duration_2021-05-18_to_2021-05-18_us-gaap-StatementClassOfStockAxis_amj-DepositarySharesEachRepresentingAOneFourHundredthInterestInAShareOf6.10NonCumulativePreferredStockSeriesAaMember">NYSE</dei:SecurityExchangeName>
    <dei:Security12bTitle contextRef="duration_2021-05-18_to_2021-05-18_us-gaap-StatementClassOfStockAxis_amj-DepositarySharesEachRepresentingAOneFourHundredthInterestInAShareOf6.15NonCumulativePreferredStockSeriesBbMember">Depositary Shares, each representing a one-four hundredth interest in a share of 6.15% Non-Cumulative Preferred Stock, Series BB</dei:Security12bTitle>
    <dei:TradingSymbol contextRef="duration_2021-05-18_to_2021-05-18_us-gaap-StatementClassOfStockAxis_amj-DepositarySharesEachRepresentingAOneFourHundredthInterestInAShareOf6.15NonCumulativePreferredStockSeriesBbMember">JPM PR H</dei:TradingSymbol>
    <dei:SecurityExchangeName contextRef="duration_2021-05-18_to_2021-05-18_us-gaap-StatementClassOfStockAxis_amj-DepositarySharesEachRepresentingAOneFourHundredthInterestInAShareOf6.15NonCumulativePreferredStockSeriesBbMember">NYSE</dei:SecurityExchangeName>
    <dei:Security12bTitle contextRef="duration_2021-05-18_to_2021-05-18_us-gaap-StatementClassOfStockAxis_amj-DepositarySharesEachRepresentingAOneFourHundredthInterestInAShareOf5.75NonCumulativePreferredStockSeriesDdMember">Depositary Shares, each representing a one-four hundredth interest in a share of 5.75% Non-Cumulative Preferred Stock, Series DD</dei:Security12bTitle>
    <dei:TradingSymbol contextRef="duration_2021-05-18_to_2021-05-18_us-gaap-StatementClassOfStockAxis_amj-DepositarySharesEachRepresentingAOneFourHundredthInterestInAShareOf5.75NonCumulativePreferredStockSeriesDdMember">JPM PR D</dei:TradingSymbol>
    <dei:SecurityExchangeName contextRef="duration_2021-05-18_to_2021-05-18_us-gaap-StatementClassOfStockAxis_amj-DepositarySharesEachRepresentingAOneFourHundredthInterestInAShareOf5.75NonCumulativePreferredStockSeriesDdMember">NYSE</dei:SecurityExchangeName>
    <dei:Security12bTitle contextRef="duration_2021-05-18_to_2021-05-18_us-gaap-StatementClassOfStockAxis_amj-DepositarySharesEachRepresentingAOneFourHundredthInterestInAShareOf6.00NonCumulativePreferredStockSeriesEeMember">Depositary Shares, each representing a one-four hundredth interest in a share of 6.00% Non-Cumulative Preferred Stock, Series EE</dei:Security12bTitle>
    <dei:TradingSymbol contextRef="duration_2021-05-18_to_2021-05-18_us-gaap-StatementClassOfStockAxis_amj-DepositarySharesEachRepresentingAOneFourHundredthInterestInAShareOf6.00NonCumulativePreferredStockSeriesEeMember">JPM PR C</dei:TradingSymbol>
    <dei:SecurityExchangeName contextRef="duration_2021-05-18_to_2021-05-18_us-gaap-StatementClassOfStockAxis_amj-DepositarySharesEachRepresentingAOneFourHundredthInterestInAShareOf6.00NonCumulativePreferredStockSeriesEeMember">NYSE</dei:SecurityExchangeName>
    <dei:Security12bTitle contextRef="duration_2021-05-18_to_2021-05-18_us-gaap-StatementClassOfStockAxis_amj-DepositarySharesEachRepresentingAOneFourHundredthInterestInAShareOf4.75NonCumulativePreferredStockSeriesGgMember">Depositary Shares, each representing a one-four hundredth interest in a share of 4.75% Non-Cumulative Preferred Stock, Series GG</dei:Security12bTitle>
    <dei:TradingSymbol contextRef="duration_2021-05-18_to_2021-05-18_us-gaap-StatementClassOfStockAxis_amj-DepositarySharesEachRepresentingAOneFourHundredthInterestInAShareOf4.75NonCumulativePreferredStockSeriesGgMember">JPM PR J</dei:TradingSymbol>
    <dei:SecurityExchangeName contextRef="duration_2021-05-18_to_2021-05-18_us-gaap-StatementClassOfStockAxis_amj-DepositarySharesEachRepresentingAOneFourHundredthInterestInAShareOf4.75NonCumulativePreferredStockSeriesGgMember">NYSE</dei:SecurityExchangeName>
    <dei:Security12bTitle contextRef="duration_2021-05-18_to_2021-05-18_us-gaap-StatementClassOfStockAxis_amj-DepositarySharesEachRepresentingAOneFourHundredthInterestInAShareOf4.55NonCumulativePreferredStockSeriesJjMember">Depositary Shares, each representing a one-four hundredth interest in a share of 4.55% Non-Cumulative Preferred Stock, Series JJ</dei:Security12bTitle>
    <dei:TradingSymbol contextRef="duration_2021-05-18_to_2021-05-18_us-gaap-StatementClassOfStockAxis_amj-DepositarySharesEachRepresentingAOneFourHundredthInterestInAShareOf4.55NonCumulativePreferredStockSeriesJjMember">JPM PR K</dei:TradingSymbol>
    <dei:SecurityExchangeName contextRef="duration_2021-05-18_to_2021-05-18_us-gaap-StatementClassOfStockAxis_amj-DepositarySharesEachRepresentingAOneFourHundredthInterestInAShareOf4.55NonCumulativePreferredStockSeriesJjMember">NYSE</dei:SecurityExchangeName>
    <dei:Security12bTitle contextRef="duration_2021-05-18_to_2021-05-18_us-gaap-StatementClassOfStockAxis_amj-AlerianMlpIndexETNsDueMay160242024Member">Alerian MLP Index ETNs due May&#160;24, 2024</dei:Security12bTitle>
    <dei:TradingSymbol contextRef="duration_2021-05-18_to_2021-05-18_us-gaap-StatementClassOfStockAxis_amj-AlerianMlpIndexETNsDueMay160242024Member">AMJ</dei:TradingSymbol>
    <dei:SecurityExchangeName contextRef="duration_2021-05-18_to_2021-05-18_us-gaap-StatementClassOfStockAxis_amj-AlerianMlpIndexETNsDueMay160242024Member">NYSEArca</dei:SecurityExchangeName>
    <dei:Security12bTitle contextRef="duration_2021-05-18_to_2021-05-18_us-gaap-StatementClassOfStockAxis_us-gaap-SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMember">Guarantee of Callable Step-Up Fixed Rate Notes due April&#160;26, 2028 of JPMorganChase Financial Company LLC</dei:Security12bTitle>
    <dei:TradingSymbol contextRef="duration_2021-05-18_to_2021-05-18_us-gaap-StatementClassOfStockAxis_us-gaap-SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMember">JPM/28</dei:TradingSymbol>
    <dei:SecurityExchangeName contextRef="duration_2021-05-18_to_2021-05-18_us-gaap-StatementClassOfStockAxis_us-gaap-SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMember">NYSE</dei:SecurityExchangeName>
    <dei:EntityEmergingGrowthCompany contextRef="duration_2021-05-18_to_2021-05-18">false</dei:EntityEmergingGrowthCompany>
</xbrl>
