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        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0002006986</identifier>
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        <period>
            <startDate>2025-01-01</startDate>
            <endDate>2025-12-31</endDate>
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    <dei:EntityRegistrantName contextRef="c0" id="ixv-97">Adagio Medical Holdings, Inc.</dei:EntityRegistrantName>
    <ecd:InsiderTrdPoliciesProcAdoptedFlag contextRef="c0" id="ixv-4646">true</ecd:InsiderTrdPoliciesProcAdoptedFlag>
    <ecd:AwardTmgMnpiDiscTextBlock contextRef="c0" id="ixv-2930">&lt;div class="BRDSX_h2" style="color: #000000; font-family: 'Times New Roman', Times, serif; font-size: 10pt; font-weight: bold; margin-top: 20.5pt; margin-left: 0pt; text-align: left;"&gt;Policies and Practices Related to the Grant of Certain Equity Awards Close in Time to the Release of Material Nonpublic Information &lt;/div&gt;&lt;div class="BRDSX_para" style="color: #000000; font-family: 'Times New Roman', Times, serif; font-size: 10pt; margin-top: 6pt; margin-left: 0pt; text-indent: 20pt; text-align: justify;"&gt;From time to time, we grant stock options to our employees, including our named executive officers. Also, non-employee directors receive automatic grants of initial and annual stock option awards, on the date of each annual meeting of stockholders, pursuant to the non-employee director compensation policy, as further described under the heading, &#x201c;Director Compensation- Non-Employee Director Compensation Program&#x201d; below. We do not otherwise maintain any written policies on the timing of awards of stock options, stock appreciation rights, or similar instruments with option-like features. The Compensation Committee considers whether there is any material nonpublic information (&#x201c;MNPI&#x201d;) about the Company when determining the timing of stock option grants and does not seek to time the award of stock options in relation to our public disclosure of MNPI. We have not timed the release of MNPI for the purpose of affecting the value of executive compensation. &lt;/div&gt;</ecd:AwardTmgMnpiDiscTextBlock>
    <ecd:AwardTmgMethodTextBlock contextRef="c0" id="ixv-4647">From time to time, we grant stock options to our employees, including our named executive officers. Also, non-employee directors receive automatic grants of initial and annual stock option awards, on the date of each annual meeting of stockholders, pursuant to the non-employee director compensation policy, as further described under the heading, &#x201c;Director Compensation- Non-Employee Director Compensation Program&#x201d; below. We do not otherwise maintain any written policies on the timing of awards of stock options, stock appreciation rights, or similar instruments with option-like features.</ecd:AwardTmgMethodTextBlock>
    <ecd:AwardTmgPredtrmndFlag contextRef="c0" id="ixv-4648">true</ecd:AwardTmgPredtrmndFlag>
    <ecd:AwardTmgHowMnpiCnsdrdTextBlock contextRef="c0" id="ixv-4649">The Compensation Committee considers whether there is any material nonpublic information (&#x201c;MNPI&#x201d;) about the Company when determining the timing of stock option grants and does not seek to time the award of stock options in relation to our public disclosure of MNPI. We have not timed the release of MNPI for the purpose of affecting the value of executive compensation.</ecd:AwardTmgHowMnpiCnsdrdTextBlock>
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