<?xml version="1.0" encoding="utf-8"?>
<xbrl
  xmlns="http://www.xbrl.org/2003/instance"
  xmlns:dei="http://xbrl.sec.gov/dei/2025"
  xmlns:ffd="http://xbrl.sec.gov/ffd/2025q4"
  xmlns:iso4217="http://www.xbrl.org/2003/iso4217"
  xmlns:link="http://www.xbrl.org/2003/linkbase"
  xmlns:xbrldi="http://xbrl.org/2006/xbrldi"
  xmlns:xlink="http://www.w3.org/1999/xlink"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
    <link:schemaRef
      xlink:href="https://xbrl.sec.gov/ffd/2025q4/ffd-2025q4.xsd"
      xlink:type="simple"/>
    <context id="rc">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001856485</identifier>
        </entity>
        <period>
            <startDate>2026-03-05</startDate>
            <endDate>2026-03-05</endDate>
        </period>
    </context>
    <context id="offrl_1">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001856485</identifier>
            <segment>
                <xbrldi:typedMember dimension="ffd:OfferingAxis">
                    <dei:lineNo>1</dei:lineNo>
                </xbrldi:typedMember>
            </segment>
        </entity>
        <period>
            <startDate>2026-03-05</startDate>
            <endDate>2026-03-05</endDate>
        </period>
    </context>
    <unit id="USD">
        <measure>iso4217:USD</measure>
    </unit>
    <unit id="Shares">
        <measure>shares</measure>
    </unit>
    <ffd:FormTp contextRef="rc" id="ixv-330">S-3</ffd:FormTp>
    <ffd:SubmissnTp contextRef="rc" id="ixv-331">S-3ASR</ffd:SubmissnTp>
    <ffd:FeeExhibitTp contextRef="rc" id="ixv-332">EX-FILING FEES</ffd:FeeExhibitTp>
    <dei:EntityCentralIndexKey contextRef="rc" id="ixv-333">0001856485</dei:EntityCentralIndexKey>
    <dei:EntityRegistrantName contextRef="rc" id="ixv-334">Sylvamo Corp</dei:EntityRegistrantName>
    <ffd:OfferingTableNa contextRef="rc" id="hiddenrcOfferingTableNa" xsi:nil="true"/>
    <ffd:OffsetTableNa contextRef="rc" id="hiddenrcOffsetTableNa">N/A</ffd:OffsetTableNa>
    <ffd:CombinedProspectusTableNa contextRef="rc" id="hiddenrcCombinedProspectusTableNa">N/A</ffd:CombinedProspectusTableNa>
    <ffd:FormTp contextRef="rc" id="ixv-362">S-3</ffd:FormTp>
    <dei:EntityRegistrantName contextRef="rc" id="ixv-363">Sylvamo Corp</dei:EntityRegistrantName>
    <ffd:OfferingSctyTp contextRef="offrl_1" id="ixv-364">Equity</ffd:OfferingSctyTp>
    <ffd:OfferingSctyTitl contextRef="offrl_1" id="ixv-365">Common Stock, par value $1.00 per share</ffd:OfferingSctyTitl>
    <ffd:Rule415a6Flg contextRef="offrl_1" id="ixv-366">true</ffd:Rule415a6Flg>
    <ffd:AmtSctiesRegd
      contextRef="offrl_1"
      decimals="0"
      id="ixv-367"
      unitRef="Shares">6312454</ffd:AmtSctiesRegd>
    <ffd:MaxAggtOfferingPric
      contextRef="offrl_1"
      decimals="2"
      id="ixv-368"
      unitRef="USD">311140858.00</ffd:MaxAggtOfferingPric>
    <ffd:CfwdFormTp contextRef="offrl_1" id="ixv-369">S-3</ffd:CfwdFormTp>
    <ffd:CfwdPrrFileNb contextRef="offrl_1" id="ixv-370">333-270299</ffd:CfwdPrrFileNb>
    <ffd:CfwdPrrFctvDt contextRef="offrl_1" id="ixv-371">2023-03-06</ffd:CfwdPrrFctvDt>
    <ffd:CfwdPrevslyPdFee
      contextRef="offrl_1"
      decimals="2"
      id="ixv-372"
      unitRef="USD">34287.73</ffd:CfwdPrevslyPdFee>
    <ffd:TtlOfferingAmt contextRef="rc" decimals="2" id="ixv-373" unitRef="USD">311140858.00</ffd:TtlOfferingAmt>
    <ffd:TtlFeeAmt contextRef="rc" decimals="2" id="ixv-374" unitRef="USD">0.00</ffd:TtlFeeAmt>
    <ffd:TtlPrevslyPdAmt contextRef="rc" decimals="2" id="ixv-375" unitRef="USD">0.00</ffd:TtlPrevslyPdAmt>
    <ffd:TtlOffsetAmt contextRef="rc" decimals="2" id="ixv-376" unitRef="USD">0.00</ffd:TtlOffsetAmt>
    <ffd:NetFeeAmt contextRef="rc" decimals="2" id="ixv-377" unitRef="USD">0.00</ffd:NetFeeAmt>
    <ffd:OfferingNote contextRef="offrl_1" id="ixv-378">Each share of common stock registered hereunder includes an associated preferred share purchase right. Such preferred share purchase rights are not currently separable from the shares of common stock, and the value, if any, attributable to such preferred share purchase rights is reflected in the market price of the shares of common stock. Pursuant to Rule 416 under the Securities Act of 1933, as amended (the "Securities Act"), the registrant is also registering such additional indeterminate number of shares of common stock as may become issuable with respect to the shares of common stock registered hereunder as a result of stock splits, stock dividends or similar transactions. In accordance with Rule 415(a)(6) under the Securities Act, the securities registered pursuant to this registration statement include 6,312,454 shares of common stock that were previously registered, but unsold, pursuant to a registration statement on Form S-3 (File No. 333-270299) filed on March 6, 2023. Pursuant to Rule 415(a)(6), the fee previously paid by the registrant with respect to such unsold shares of common stock continues to apply to such shares and no fees are due with respect to such shares.</ffd:OfferingNote>
</xbrl>
