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        <period>
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    <context id="offrl_1">
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            <startDate>2025-12-12</startDate>
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    <context id="offrl_3">
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            <identifier scheme="http://www.sec.gov/CIK">0001222401</identifier>
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        <period>
            <startDate>2025-12-12</startDate>
            <endDate>2025-12-12</endDate>
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    <context id="offrl_4">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001222401</identifier>
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                <xbrldi:typedMember dimension="ffd:OfferingAxis">
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        <period>
            <startDate>2025-12-12</startDate>
            <endDate>2025-12-12</endDate>
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    <unit id="USD">
        <measure>iso4217:USD</measure>
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    <unit id="pure">
        <measure>pure</measure>
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    <unit id="Shares">
        <measure>shares</measure>
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    <ffd:FormTp contextRef="rc" id="ixv-390">N-2</ffd:FormTp>
    <ffd:SubmissnTp contextRef="rc" id="ixv-391">N-2ASR</ffd:SubmissnTp>
    <ffd:FeeExhibitTp contextRef="rc" id="ixv-392">EX-FILING FEES</ffd:FeeExhibitTp>
    <dei:EntityCentralIndexKey contextRef="rc" id="ixv-393">0001222401</dei:EntityCentralIndexKey>
    <dei:EntityRegistrantName contextRef="rc" id="ixv-394">BLACKROCK CORPORATE HIGH YIELD FUND, INC.</dei:EntityRegistrantName>
    <ffd:OfferingTableNa contextRef="rc" id="hiddenrcOfferingTableNa" xsi:nil="true"/>
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    <dei:EntityRegistrantName contextRef="rc" id="ixv-450">BLACKROCK CORPORATE HIGH YIELD FUND, INC.</dei:EntityRegistrantName>
    <ffd:PrevslyPdFlg contextRef="offrl_1" id="ixv-451">false</ffd:PrevslyPdFlg>
    <ffd:OfferingSctyTp contextRef="offrl_1" id="ixv-452">Equity</ffd:OfferingSctyTp>
    <ffd:OfferingSctyTitl contextRef="offrl_1" id="ixv-453">Common Stock</ffd:OfferingSctyTitl>
    <ffd:Rule457aFlg contextRef="offrl_1" id="ixv-454">true</ffd:Rule457aFlg>
    <ffd:AmtSctiesRegd
      contextRef="offrl_1"
      decimals="0"
      id="ixv-455"
      unitRef="Shares">17920328</ffd:AmtSctiesRegd>
    <ffd:MaxOfferingPricPerScty
      contextRef="offrl_1"
      decimals="INF"
      id="ixv-456"
      unitRef="USD">9.46</ffd:MaxOfferingPricPerScty>
    <ffd:MaxAggtOfferingPric
      contextRef="offrl_1"
      decimals="INF"
      id="ixv-457"
      unitRef="USD">169526302.88</ffd:MaxAggtOfferingPric>
    <ffd:FeeRate
      contextRef="offrl_1"
      decimals="INF"
      id="ixv-458"
      unitRef="pure">0.0001381</ffd:FeeRate>
    <ffd:FeeAmt
      contextRef="offrl_1"
      decimals="INF"
      id="ixv-459"
      unitRef="USD">23411.58</ffd:FeeAmt>
    <ffd:PrevslyPdFlg contextRef="offrl_2" id="ixv-460">false</ffd:PrevslyPdFlg>
    <ffd:OfferingSctyTp contextRef="offrl_2" id="ixv-461">Equity</ffd:OfferingSctyTp>
    <ffd:OfferingSctyTitl contextRef="offrl_2" id="ixv-462">Rights to Purchase Shares of Common Stock</ffd:OfferingSctyTitl>
    <ffd:FeesOthrRuleFlg contextRef="offrl_2" id="ixv-463">true</ffd:FeesOthrRuleFlg>
    <ffd:FeeRate
      contextRef="offrl_2"
      decimals="INF"
      id="ixv-464"
      unitRef="pure">0.0001381</ffd:FeeRate>
    <ffd:FeeAmt
      contextRef="offrl_2"
      decimals="INF"
      id="ixv-465"
      unitRef="USD">0.00</ffd:FeeAmt>
    <ffd:OfferingSctyTp contextRef="offrl_3" id="ixv-466">Equity</ffd:OfferingSctyTp>
    <ffd:OfferingSctyTitl contextRef="offrl_3" id="ixv-467">Common Stock</ffd:OfferingSctyTitl>
    <ffd:Rule415a6Flg contextRef="offrl_3" id="ixv-468">true</ffd:Rule415a6Flg>
    <ffd:AmtSctiesRegd
      contextRef="offrl_3"
      decimals="0"
      id="ixv-469"
      unitRef="Shares">36485289</ffd:AmtSctiesRegd>
    <ffd:MaxAggtOfferingPric
      contextRef="offrl_3"
      decimals="INF"
      id="ixv-470"
      unitRef="USD">357555832.20</ffd:MaxAggtOfferingPric>
    <ffd:CfwdFormTp contextRef="offrl_3" id="ixv-471">N-2</ffd:CfwdFormTp>
    <ffd:CfwdPrrFileNb contextRef="offrl_3" id="ixv-472">333-284646</ffd:CfwdPrrFileNb>
    <ffd:CfwdPrrFctvDt contextRef="offrl_3" id="ixv-473">2025-02-07</ffd:CfwdPrrFctvDt>
    <ffd:CfwdPrevslyPdFee
      contextRef="offrl_3"
      decimals="INF"
      id="ixv-474"
      unitRef="USD">54741.80</ffd:CfwdPrevslyPdFee>
    <ffd:OfferingSctyTp contextRef="offrl_4" id="ixv-475">Equity</ffd:OfferingSctyTp>
    <ffd:OfferingSctyTitl contextRef="offrl_4" id="ixv-476">Common Stock</ffd:OfferingSctyTitl>
    <ffd:Rule415a6Flg contextRef="offrl_4" id="ixv-477">true</ffd:Rule415a6Flg>
    <ffd:AmtSctiesRegd
      contextRef="offrl_4"
      decimals="0"
      id="ixv-478"
      unitRef="Shares">594383</ffd:AmtSctiesRegd>
    <ffd:MaxAggtOfferingPric
      contextRef="offrl_4"
      decimals="INF"
      id="ixv-479"
      unitRef="USD">6526325.34</ffd:MaxAggtOfferingPric>
    <ffd:CfwdFormTp contextRef="offrl_4" id="ixv-480">N-2</ffd:CfwdFormTp>
    <ffd:CfwdPrrFileNb contextRef="offrl_4" id="ixv-481">333-262469</ffd:CfwdPrrFileNb>
    <ffd:CfwdPrrFctvDt contextRef="offrl_4" id="ixv-482">2022-12-29</ffd:CfwdPrrFctvDt>
    <ffd:CfwdPrevslyPdFee
      contextRef="offrl_4"
      decimals="INF"
      id="ixv-483"
      unitRef="USD">604.99</ffd:CfwdPrevslyPdFee>
    <ffd:TtlOfferingAmt contextRef="rc" decimals="INF" id="ixv-484" unitRef="USD">533608460.42</ffd:TtlOfferingAmt>
    <ffd:TtlFeeAmt contextRef="rc" decimals="INF" id="ixv-485" unitRef="USD">23411.58</ffd:TtlFeeAmt>
    <ffd:TtlPrevslyPdAmt contextRef="rc" decimals="INF" id="ixv-486" unitRef="USD">0.00</ffd:TtlPrevslyPdAmt>
    <ffd:TtlOffsetAmt contextRef="rc" decimals="INF" id="ixv-487" unitRef="USD">0.00</ffd:TtlOffsetAmt>
    <ffd:NetFeeAmt contextRef="rc" decimals="INF" id="ixv-488" unitRef="USD">23411.58</ffd:NetFeeAmt>
    <ffd:OfferingNote contextRef="offrl_1" id="ixv-489">The Registrant is relying on Rule 457(c) under the Securities Act of 1933 to calculate the registration fee. The Maximum Aggregate Offering Price is estimated solely for the purpose of determining the registration fee in accordance with Rule 457(c) under the Securities Act of 1933 based on the average of the high and low sales prices of the shares of common stock on December 5, 2025, as reported on the New York Stock Exchange. The proposed maximum offering price per security will be determined, from time to time, by the Registrant in connection with the sale by the Registrant of the securities registered under this Registration Statement.</ffd:OfferingNote>
    <ffd:OfferingNote contextRef="offrl_2" id="ixv-490">No separate consideration will be received by the Registrant. Any shares issued pursuant to an offering of rights to purchase shares of common stock, including any shares issued pursuant to an over-subscription privilege or a secondary over-subscription privilege, will be shares registered under this Registration Statement.</ffd:OfferingNote>
    <ffd:OfferingNote contextRef="offrl_3" id="ixv-491">Pursuant to Rule 415(a)(6) under the Securities Act, this registration statement includes 36,485,289 of unsold shares of common stock (the "Unsold Carryfoward Shares") that were previously registered for sale under the Registrant's prior registration statement on Form N-2ASR (File No. 333-284646) effective January 31, 2025 (the "Prior Registration Statement"). The Registrant previously paid filing fees of $54,741.80 in connection with the Unsold Carryforward Shares. Pursuant to Rule 415(a)(6) under the Securities Act, the filing fees previously paid with respect to the Unsold Carryforward Shares will continue to be applied to such Unsold Carryforward Shares. Pursuant to Rule 415(a)(6) under the Securities Act, the offering of Unsold Carryforward Shares under the Prior Registration Statement will be deemed terminated as of the date of effectiveness of this registration statement.</ffd:OfferingNote>
    <ffd:OfferingNote contextRef="offrl_4" id="ixv-492">Pursuant to Rule 415(a)(6) under the Securities Act, this registration statement includes 594,383 of unsold shares of common stock (the "Unsold Carryforward Shares") that were originally registered for sale under the Registrant's registration statement on Form N-2ASR (File No. 333-262469) effective February 2, 2022 and included on the Prior Registration Statement pursuant to Rule 415(a)(6) under the Securities Act. The Registrant previously paid filing fees of $604.99 in connection with the Unsold Carryforward Shares. Pursuant to Rule 415(a)(6) under the Securities Act, the filing fees previously paid with respect to the Unsold Carryforward Shares will continue to be applied to such Unsold Carryforward Shares. Pursuant to Rule 415(a)(6) under the Securities Act, the offering of Unsold Carryforward Shares under the Prior Registration Statement will be deemed terminated as of the date of effectiveness of this registration statement.</ffd:OfferingNote>
</xbrl>
