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  xml:lang="en-US"
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  xmlns:cmp="http://www.compassminerals.com/20260827"
  xmlns:dei="http://xbrl.sec.gov/dei/2024"
  xmlns:ffd="http://xbrl.sec.gov/ffd/2024q2"
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      xlink:href="https://xbrl.sec.gov/ffd/2024q2/ffd-2024q2.xsd"
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        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001227654</identifier>
        </entity>
        <period>
            <startDate>2026-08-27</startDate>
            <endDate>2026-08-27</endDate>
        </period>
    </context>
    <context id="c-2">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001227654</identifier>
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                <xbrldi:typedMember dimension="ffd:OfferingAxis">
                    <dei:lineNo>1</dei:lineNo>
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        <period>
            <startDate>2026-08-27</startDate>
            <endDate>2026-08-27</endDate>
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    <unit id="share">
        <measure>cmp:share</measure>
    </unit>
    <unit id="usd">
        <measure>iso4217:USD</measure>
    </unit>
    <unit id="number">
        <measure>pure</measure>
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    <dei:EntityCentralIndexKey contextRef="c-1" id="f-18">0001227654</dei:EntityCentralIndexKey>
    <ffd:FeeExhibitTp contextRef="c-1" id="f-19">EX-FILING FEES</ffd:FeeExhibitTp>
    <ffd:OffsetTableNa contextRef="c-1" id="f-20">N/A</ffd:OffsetTableNa>
    <ffd:SubmissnTp contextRef="c-1" id="f-1">S-8</ffd:SubmissnTp>
    <ffd:FormTp contextRef="c-1" id="f-2">S-8</ffd:FormTp>
    <dei:EntityRegistrantName contextRef="c-1" id="f-3">Compass Minerals International, Inc.</dei:EntityRegistrantName>
    <ffd:OfferingSctyTp contextRef="c-2" id="f-4">Equity</ffd:OfferingSctyTp>
    <ffd:PrevslyPdFlg contextRef="c-2" id="f-5">false</ffd:PrevslyPdFlg>
    <ffd:OfferingSctyTitl contextRef="c-2" id="f-6">Common Stock, $0.01 par value per share, reserved for issuance pursuant to the Compass Minerals International, Inc. 2020 Incentive Award Plan</ffd:OfferingSctyTitl>
    <ffd:FeesOthrRuleFlg contextRef="c-2" id="f-7">true</ffd:FeesOthrRuleFlg>
    <ffd:AmtSctiesRegd contextRef="c-2" decimals="0" id="f-8" unitRef="share">1700000</ffd:AmtSctiesRegd>
    <ffd:MaxOfferingPricPerScty contextRef="c-2" decimals="2" id="f-9" unitRef="usd">25.42</ffd:MaxOfferingPricPerScty>
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    <ffd:FeeRate contextRef="c-2" decimals="8" id="f-11" unitRef="number">0.00013810</ffd:FeeRate>
    <ffd:FeeAmt contextRef="c-2" decimals="2" id="f-12" unitRef="usd">5967.86</ffd:FeeAmt>
    <ffd:TtlOfferingAmt contextRef="c-1" decimals="0" id="f-13" unitRef="usd">43214000</ffd:TtlOfferingAmt>
    <ffd:TtlFeeAmt contextRef="c-1" decimals="2" id="f-14" unitRef="usd">5967.86</ffd:TtlFeeAmt>
    <ffd:TtlOffsetAmt contextRef="c-1" decimals="0" id="f-15" unitRef="usd">0</ffd:TtlOffsetAmt>
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    <ffd:OfferingNote contextRef="c-2" id="f-17">&lt;div style="margin-top:3pt;padding-left:18pt;text-align:justify;text-indent:-18pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%"&gt;(1)&lt;/span&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%;padding-left:7.52pt"&gt;Pursuant to Rule 416(a) promulgated under the Securities Act of 1933, as amended (the &#x201c;Securities Act&#x201d;), this Registration Statement shall also cover any additional shares of common stock, par value $0.01 per share (&#x201c;Common Stock&#x201d;), of Compass Minerals International, Inc. (the &#x201c;Company&#x201d;) that become issuable under the Company&#x2019;s 2020 Incentive Award Plan (as amended to date, the &#x201c;2020 Plan&#x201d;) by reason of any stock dividend, stock split, recapitalization or other similar transaction effected without receipt of consideration that increases the number of outstanding shares of Common Stock.&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-top:3pt;padding-left:18pt;text-align:justify;text-indent:-18pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%"&gt;(2)&lt;/span&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%;padding-left:7.52pt"&gt;The number of shares registered represents 1,700,000 additional shares of Common Stock that became available for issuance as a result of the third amendment to the 2020 Plan, which was approved by the Company&#x2019;s stockholders at the Company&#x2019;s annual meeting of stockholders held on March 6, 2025.&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-top:3pt;padding-left:18pt;text-align:justify;text-indent:-18pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%"&gt;(3)&lt;/span&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%;padding-left:7.52pt"&gt;The Proposed Maximum Offering Price Per Unit is estimated in accordance with Rule 457(c) and Rule 457(h) of the Securities Act solely for purposes of calculating the registration fee. The Proposed Maximum Offering Price Per Share for shares available for future grant is the average of the high and low prices for the registrant&#x2019;s Common Stock as reported on The New York Stock Exchange on August 24, 2026, which was $25.42.&lt;/span&gt;&lt;/div&gt;</ffd:OfferingNote>
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