<?xml version="1.0" encoding="utf-8"?>
<xbrl
  xml:lang="en-US"
  xmlns="http://www.xbrl.org/2003/instance"
  xmlns:dei="http://xbrl.sec.gov/dei/2025"
  xmlns:ffd="http://xbrl.sec.gov/ffd/2025"
  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">
    <link:schemaRef
      xlink:href="https://xbrl.sec.gov/ffd/2025/ffd-2025.xsd"
      xlink:type="simple"/>
    <context id="c-1">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001709048</identifier>
        </entity>
        <period>
            <startDate>2026-09-14</startDate>
            <endDate>2026-09-14</endDate>
        </period>
    </context>
    <context id="c-2">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001709048</identifier>
            <segment>
                <xbrldi:typedMember dimension="ffd:OfferingAxis">
                    <dei:lineNo>1</dei:lineNo>
                </xbrldi:typedMember>
            </segment>
        </entity>
        <period>
            <startDate>2026-09-14</startDate>
            <endDate>2026-09-14</endDate>
        </period>
    </context>
    <context id="c-3">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001709048</identifier>
            <segment>
                <xbrldi:typedMember dimension="ffd:OfferingAxis">
                    <dei:lineNo>2</dei:lineNo>
                </xbrldi:typedMember>
            </segment>
        </entity>
        <period>
            <startDate>2026-09-14</startDate>
            <endDate>2026-09-14</endDate>
        </period>
    </context>
    <unit id="shares">
        <measure>shares</measure>
    </unit>
    <unit id="usd">
        <measure>iso4217:USD</measure>
    </unit>
    <unit id="number">
        <measure>pure</measure>
    </unit>
    <dei:EntityCentralIndexKey contextRef="c-1" id="f-1">0001709048</dei:EntityCentralIndexKey>
    <dei:EntityRegistrantName contextRef="c-1" id="f-2">GLOBALFOUNDRIES Inc.</dei:EntityRegistrantName>
    <ffd:FeeExhibitTp contextRef="c-1" id="f-3">EX-FILING FEES</ffd:FeeExhibitTp>
    <ffd:OffsetTableNa contextRef="c-1" id="f-4">N/A</ffd:OffsetTableNa>
    <ffd:SubmissnTp contextRef="c-1" id="f-5">S-8</ffd:SubmissnTp>
    <ffd:FormTp contextRef="c-1" id="f-6">S-8</ffd:FormTp>
    <ffd:PrevslyPdFlg contextRef="c-2" id="f-7">false</ffd:PrevslyPdFlg>
    <ffd:OfferingSctyTp contextRef="c-2" id="f-8">Equity</ffd:OfferingSctyTp>
    <ffd:OfferingSctyTitl contextRef="c-2" id="f-9">Ordinary Shares, par value US$0.02 per share, reserved for future issuance under GlobalFoundries Inc. 2021 Equity Compensation Plan</ffd:OfferingSctyTitl>
    <ffd:FeesOthrRuleFlg contextRef="c-2" id="f-10">true</ffd:FeesOthrRuleFlg>
    <ffd:AmtSctiesRegd contextRef="c-2" decimals="0" id="f-11" unitRef="shares">14151525</ffd:AmtSctiesRegd>
    <ffd:MaxOfferingPricPerScty contextRef="c-2" decimals="2" id="f-12" unitRef="usd">45.67</ffd:MaxOfferingPricPerScty>
    <ffd:MaxAggtOfferingPric contextRef="c-2" decimals="2" id="f-13" unitRef="usd">646300146.75</ffd:MaxAggtOfferingPric>
    <ffd:FeeRate contextRef="c-2" decimals="8" id="f-14" unitRef="number">0.00013810</ffd:FeeRate>
    <ffd:FeeAmt contextRef="c-2" decimals="2" id="f-15" unitRef="usd">89254.05</ffd:FeeAmt>
    <ffd:OfferingSctyTp contextRef="c-3" id="f-16">Equity</ffd:OfferingSctyTp>
    <ffd:PrevslyPdFlg contextRef="c-3" id="f-17">false</ffd:PrevslyPdFlg>
    <ffd:OfferingSctyTitl contextRef="c-3" id="f-18">Ordinary Shares, par value US$0.02 per share, reserved for future issuance under the GlobalFoundries Inc. 2021 Employee Stock Purchase Plan</ffd:OfferingSctyTitl>
    <ffd:FeesOthrRuleFlg contextRef="c-3" id="f-19">true</ffd:FeesOthrRuleFlg>
    <ffd:AmtSctiesRegd contextRef="c-3" decimals="0" id="f-20" unitRef="shares">5477642</ffd:AmtSctiesRegd>
    <ffd:MaxOfferingPricPerScty contextRef="c-3" decimals="2" id="f-21" unitRef="usd">45.67</ffd:MaxOfferingPricPerScty>
    <ffd:MaxAggtOfferingPric contextRef="c-3" decimals="2" id="f-22" unitRef="usd">250163910.14</ffd:MaxAggtOfferingPric>
    <ffd:FeeRate contextRef="c-3" decimals="8" id="f-23" unitRef="number">0.00013810</ffd:FeeRate>
    <ffd:FeeAmt contextRef="c-3" decimals="2" id="f-24" unitRef="usd">34547.64</ffd:FeeAmt>
    <ffd:TtlOfferingAmt contextRef="c-1" decimals="2" id="f-25" unitRef="usd">896464056.89</ffd:TtlOfferingAmt>
    <ffd:TtlFeeAmt contextRef="c-1" decimals="2" id="f-26" unitRef="usd">123801.69</ffd:TtlFeeAmt>
    <ffd:TtlOffsetAmt contextRef="c-1" decimals="2" id="f-27" unitRef="usd">0.00</ffd:TtlOffsetAmt>
    <ffd:NetFeeAmt contextRef="c-1" decimals="2" id="f-28" unitRef="usd">123801.69</ffd:NetFeeAmt>
    <ffd:OfferingNote contextRef="c-3" id="f-30">&lt;div style="padding-right:-1.88pt;text-align:justify"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"&gt;Pursuant to Rule 416(a) of the Securities Act of 1933, as amended (the &#x201c;&lt;/span&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%"&gt;Securities Act&lt;/span&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"&gt;&#x201d;), this Registration Statement covers any additional ordinary shares of the Registrant, $0.02 par value per ordinary share (&#x201c;&lt;/span&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%"&gt;Ordinary Shares&lt;/span&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"&gt;&#x201d;) that become issuable under the Registrant&#x2019;s 2021 Equity Compensation Plan (the &#x201c;&lt;/span&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%"&gt;2021 Plan&lt;/span&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"&gt;&#x201d;) and the Registrant&#x2019;s Employee Stock Purchase Plan (the &#x201c;&lt;/span&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%"&gt;ESPP&lt;/span&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"&gt;&#x201d;) by reason of any stock dividend, stock split or other similar transaction effected without the Registrant&#x2019;s receipt of consideration which results in an increase in the number of the outstanding Ordinary Shares.&#160;&lt;/span&gt;&lt;/div&gt;&lt;div style="padding-right:-1.88pt;text-align:justify"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"&gt;Estimated solely for the purpose of calculating the registration fee pursuant to Rules 457(c) and 457(h) of the Securities Act, based on the average of the high and low prices per Ordinary Share of the Registrant as reported on the Nasdaq Stock Exchange on September 9, 2026, of $45.67.&#160;&lt;/span&gt;&lt;/div&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Represents 5,477,642 additional Ordinary Shares that were automatically added to the shares authorized for issuance under the ESPP pursuant to an annual &#x201c;evergreen&#x201d; increase provision contained in the ESPP.&lt;/span&gt;</ffd:OfferingNote>
    <ffd:OfferingNote contextRef="c-2" id="f-29">&lt;div style="padding-right:-1.88pt;text-align:justify"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"&gt;Pursuant to Rule 416(a) of the Securities Act of 1933, as amended (the &#x201c;&lt;/span&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%"&gt;Securities Act&lt;/span&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"&gt;&#x201d;), this Registration Statement covers any additional ordinary shares of the Registrant, $0.02 par value per ordinary share (&#x201c;&lt;/span&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%"&gt;Ordinary Shares&lt;/span&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"&gt;&#x201d;) that become issuable under the Registrant&#x2019;s 2021 Equity Compensation Plan (the &#x201c;&lt;/span&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%"&gt;2021 Plan&lt;/span&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"&gt;&#x201d;) and the Registrant&#x2019;s Employee Stock Purchase Plan (the &#x201c;&lt;/span&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%"&gt;ESPP&lt;/span&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"&gt;&#x201d;) by reason of any stock dividend, stock split or other similar transaction effected without the Registrant&#x2019;s receipt of consideration which results in an increase in the number of the outstanding Ordinary Shares.&#160;&lt;/span&gt;&lt;/div&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Represents 11,724,176 Ordinary Shares that were automatically added to the shares authorized for issuance under the 2021 Plan pursuant to an annual &#x201c;evergreen&#x201d; increase provision contained in the 2021 Plan, and 2,427,349 Ordinary Shares that have become available for issuance again as of August 31, 2026 under the 2021 Plan in accordance with the share recycling provision of such plan.&#160;&lt;/span&gt;Estimated solely for the purpose of calculating the registration fee pursuant to Rules 457(c) and 457(h) of the Securities Act, based on the average of the high and low prices per Ordinary Share of the Registrant as reported on the Nasdaq Stock Exchange on September 9, 2026, of $45.67.</ffd:OfferingNote>
</xbrl>
