<?xml version="1.0" encoding="utf-8"?>
<xbrl
  xml:lang="en-US"
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        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001428205</identifier>
        </entity>
        <period>
            <startDate>2026-05-08</startDate>
            <endDate>2026-05-08</endDate>
        </period>
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    <context id="c-2">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001428205</identifier>
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        <period>
            <startDate>2026-05-08</startDate>
            <endDate>2026-05-08</endDate>
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    <unit id="shares">
        <measure>shares</measure>
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    <unit id="usd">
        <measure>iso4217:USD</measure>
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    <unit id="number">
        <measure>pure</measure>
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    <dei:EntityCentralIndexKey contextRef="c-1" id="f-1">0001428205</dei:EntityCentralIndexKey>
    <dei:EntityRegistrantName contextRef="c-1" id="f-2">ARMOUR Residential REIT, Inc.</dei:EntityRegistrantName>
    <ffd:FormTp contextRef="c-1" id="f-3">S-8</ffd:FormTp>
    <ffd:SubmissnTp contextRef="c-1" id="f-4">S-8</ffd:SubmissnTp>
    <ffd:FeeExhibitTp contextRef="c-1" id="f-5">EX-FILING FEES</ffd:FeeExhibitTp>
    <ffd:OffsetTableNa contextRef="c-1" id="f-6">N/A</ffd:OffsetTableNa>
    <ffd:PrevslyPdFlg contextRef="c-2" id="f-7">false</ffd:PrevslyPdFlg>
    <ffd:OfferingSctyTp contextRef="c-2" id="f-8">Equity</ffd:OfferingSctyTp>
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    <ffd:FeesOthrRuleFlg contextRef="c-2" id="f-10">true</ffd:FeesOthrRuleFlg>
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    <ffd:TtlFeeAmt contextRef="c-1" decimals="2" id="f-17" unitRef="usd">2384.3</ffd:TtlFeeAmt>
    <ffd:TtlOffsetAmt contextRef="c-1" decimals="2" id="f-18" unitRef="usd">0</ffd:TtlOffsetAmt>
    <ffd:NetFeeAmt contextRef="c-1" decimals="2" id="f-19" unitRef="usd">2384.3</ffd:NetFeeAmt>
    <ffd:OfferingNote contextRef="c-2" id="f-20">&lt;div style="margin-top:3pt;padding-left:40.5pt;text-indent:-40.5pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"&gt;(1)&lt;/span&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:28.84pt"&gt;Pursuant to Rule 416 under the Securities Act of 1933, as amended (the &#x201c;Securities Act&#x201d;), also registered hereby are such additional and indeterminate number of shares of common stock as may become issuable under our Fourth Amended and Restated 2009 Stock Incentive Plan by reason of any stock dividend, stock split, recapitalization or other similar transaction.&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:120%;padding-left:28.84pt"&gt;Calculated pursuant to Rule 457(c) and Rule 457(h) under the Securities Act, based upon the average of the high and low price per share of our common stock as reported on the New York Stock Exchange on May 5, 2026.&lt;/span&gt;</ffd:OfferingNote>
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