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    <context id="rc">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000079879</identifier>
        </entity>
        <period>
            <startDate>2026-04-28</startDate>
            <endDate>2026-04-28</endDate>
        </period>
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    <context id="offrl_1">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000079879</identifier>
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                <xbrldi:typedMember dimension="ffd:OfferingAxis">
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        <period>
            <startDate>2026-04-28</startDate>
            <endDate>2026-04-28</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-168">S-8</ffd:FormTp>
    <ffd:SubmissnTp contextRef="rc" id="ixv-169">S-8</ffd:SubmissnTp>
    <ffd:FeeExhibitTp contextRef="rc" id="ixv-170">EX-FILING FEES</ffd:FeeExhibitTp>
    <dei:EntityCentralIndexKey contextRef="rc" id="ixv-171">0000079879</dei:EntityCentralIndexKey>
    <dei:EntityRegistrantName contextRef="rc" id="ixv-172">PPG INDUSTRIES INC</dei:EntityRegistrantName>
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    <ffd:OfferingSctyTp contextRef="offrl_1" id="ixv-202">Equity</ffd:OfferingSctyTp>
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      unitRef="USD">110.175</ffd:MaxOfferingPricPerScty>
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      contextRef="offrl_1"
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      unitRef="pure">0.0001381</ffd:FeeRate>
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      id="ixv-209"
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    <ffd:TtlOffsetAmt contextRef="rc" decimals="2" id="ixv-212" unitRef="USD">0.00</ffd:TtlOffsetAmt>
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    <ffd:OfferingNote contextRef="offrl_1" id="ixv-214">The amount registered consists of 100,000 shares of Common Stock, par value $1.66 2/3 per share, of PPG Industries, Inc. ("Common Stock") authorized for issuance in connection with the PPG Industries, Inc. Deferred Compensation Plan for Directors (the "Plan"). This Registration Statement also covers additional securities to be offered or issued upon any adjustment or change made to the registered securities by reason of any stock split, stock dividend, recapitalization or similar transaction effected without the receipt of consideration which results in an increase in the number of the Registrant's outstanding shares of common stock, par value $1.66 2/3 per share, as permitted by Rule 416(a) and Rule 416(b) under the Securities Act. The proposed maximum offering price per unit and the maximum aggregate offering price are estimated solely for purposes of calculating the registration fee in accordance with Rule 457(c) and Rule 457(h) under the Securities Act. The maximum aggregate offering price is calculated as the average of the high and low prices reported for a share of Common Stock on The New York Stock Exchange on April 24, 2026.</ffd:OfferingNote>
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