<?xml version="1.0" encoding="utf-8"?>
<xbrl
  xmlns="http://www.xbrl.org/2003/instance"
  xmlns:dei="http://xbrl.sec.gov/dei/2026"
  xmlns:ffd="http://xbrl.sec.gov/ffd/2026"
  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/2026/ffd-2026.xsd"
      xlink:type="simple"/>
    <context id="rc">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0002152623</identifier>
        </entity>
        <period>
            <startDate>2026-10-28</startDate>
            <endDate>2026-10-28</endDate>
        </period>
    </context>
    <context id="offrl_1">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0002152623</identifier>
            <segment>
                <xbrldi:typedMember dimension="ffd:OfferingAxis">
                    <dei:lineNo>1</dei:lineNo>
                </xbrldi:typedMember>
            </segment>
        </entity>
        <period>
            <startDate>2026-10-28</startDate>
            <endDate>2026-10-28</endDate>
        </period>
    </context>
    <context id="ofst_1">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0002152623</identifier>
            <segment>
                <xbrldi:typedMember dimension="ffd:OffsetAxis">
                    <dei:lineNo>1</dei:lineNo>
                </xbrldi:typedMember>
            </segment>
        </entity>
        <period>
            <startDate>2026-10-28</startDate>
            <endDate>2026-10-28</endDate>
        </period>
    </context>
    <context id="ofst_2">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0002152623</identifier>
            <segment>
                <xbrldi:typedMember dimension="ffd:OffsetAxis">
                    <dei:lineNo>2</dei:lineNo>
                </xbrldi:typedMember>
            </segment>
        </entity>
        <period>
            <startDate>2026-10-28</startDate>
            <endDate>2026-10-28</endDate>
        </period>
    </context>
    <unit id="USD">
        <measure>iso4217:USD</measure>
    </unit>
    <unit id="pure">
        <measure>pure</measure>
    </unit>
    <unit id="Shares">
        <measure>shares</measure>
    </unit>
    <ffd:FormTp contextRef="rc" id="ixv-207">S-8</ffd:FormTp>
    <ffd:SubmissnTp contextRef="rc" id="ixv-208">S-8</ffd:SubmissnTp>
    <ffd:FeeExhibitTp contextRef="rc" id="ixv-209">EX-FILING FEES</ffd:FeeExhibitTp>
    <dei:EntityCentralIndexKey contextRef="rc" id="ixv-210">0002152623</dei:EntityCentralIndexKey>
    <dei:EntityRegistrantName contextRef="rc" id="ixv-211">Navient Holdings, Inc.</dei:EntityRegistrantName>
    <ffd:OfferingTableNa contextRef="rc" id="hiddenrcOfferingTableNa" xsi:nil="true"/>
    <ffd:OffsetTableNa contextRef="rc" id="hiddenrcOffsetTableNa" xsi:nil="true"/>
    <ffd:PrevslyPdFlg contextRef="offrl_1" id="ixv-214">false</ffd:PrevslyPdFlg>
    <ffd:OffsetClmdInd contextRef="ofst_1" id="ixv-215">true</ffd:OffsetClmdInd>
    <ffd:OffsetClmdInd contextRef="ofst_2" id="ixv-216">false</ffd:OffsetClmdInd>
    <ffd:FormTp contextRef="rc" id="ixv-259">S-8</ffd:FormTp>
    <dei:EntityRegistrantName contextRef="rc" id="ixv-260">Navient Holdings, Inc.</dei:EntityRegistrantName>
    <ffd:OfferingSctyTp contextRef="offrl_1" id="ixv-261">Equity</ffd:OfferingSctyTp>
    <ffd:OfferingSctyTitl contextRef="offrl_1" id="ixv-262">Common Stock, $0.01 par value per share</ffd:OfferingSctyTitl>
    <ffd:FeesOthrRuleFlg contextRef="offrl_1" id="ixv-263">true</ffd:FeesOthrRuleFlg>
    <ffd:AmtSctiesRegd
      contextRef="offrl_1"
      decimals="0"
      id="ixv-264"
      unitRef="Shares">32261183</ffd:AmtSctiesRegd>
    <ffd:MaxOfferingPricPerScty
      contextRef="offrl_1"
      decimals="2"
      id="ixv-265"
      unitRef="USD">8.46</ffd:MaxOfferingPricPerScty>
    <ffd:MaxAggtOfferingPric
      contextRef="offrl_1"
      decimals="2"
      id="ixv-266"
      unitRef="USD">272929608.18</ffd:MaxAggtOfferingPric>
    <ffd:FeeRate
      contextRef="offrl_1"
      decimals="6"
      id="ixv-267"
      unitRef="pure">0.000087</ffd:FeeRate>
    <ffd:FeeAmt
      contextRef="offrl_1"
      decimals="2"
      id="ixv-268"
      unitRef="USD">23744.88</ffd:FeeAmt>
    <ffd:TtlOfferingAmt contextRef="rc" decimals="2" id="ixv-269" unitRef="USD">272929608.18</ffd:TtlOfferingAmt>
    <ffd:TtlFeeAmt contextRef="rc" decimals="2" id="ixv-270" unitRef="USD">23744.88</ffd:TtlFeeAmt>
    <ffd:TtlOffsetAmt contextRef="rc" decimals="2" id="ixv-271" unitRef="USD">16529.81</ffd:TtlOffsetAmt>
    <ffd:NetFeeAmt contextRef="rc" decimals="2" id="ixv-272" unitRef="USD">7215.07</ffd:NetFeeAmt>
    <ffd:OfferingNote contextRef="offrl_1" id="ixv-273">(1) In accordance with Rule 416 under the Securities Act of 1933, as amended (the "Securities Act"), this registration statement shall be deemed to cover any additional securities that may from time to time be offered or issued to prevent dilution resulting from stock splits, stock dividends or similar transactions. (2) 7,338,831 shares issuable pursuant to the Navient Holdings, Inc. 2024 Omnibus Incentive Plan, 1,000,000 shares issuable pursuant to the Navient Holdings, Inc. 2014 Omnibus Incentive Plan, 1,422,352 shares issuable pursuant to the Navient Holdings, Inc. Employee Stock Purchase Plan, 1,000,000 shares issuable and the Registrant's unsecured obligation to pay deferred compensation in the future pursuant to the Navient Holdings, Inc. Deferred Compensation Plan, 500,000 shares issuable and the Registrant's unsecured obligation to pay deferred compensation in the future pursuant to the Navient Holdings, Inc. Deferred Compensation Plan for Directors Plan, 20,000,000 shares issuable pursuant to the Navient Corporation 401(k) Savings Plan and 1,000,000 shares issuable and the Registrant's unsecured obligation to pay deferred compensation in the future pursuant to the Navient Corporation Supplemental 401(k) Savings Plan. (3) Estimated solely for the purpose of calculating the registration fee pursuant to Rules 457(c) and 457(h) of the Securities Act and based upon the average of the high and low prices of the Registrant's Common Stock as reported on the Nasdaq Global Select Market on October 27, 2026. (4) As set forth in Table 2 below, Navient Corporation, a Delaware corporation ("Navient"), previously paid registration fees of $16,529.81 associated with certain unsold securities from Navient's registration statement on Form S-8 (File No. 333-279739) filed on May 28, 2024 (the "Prior Registration Statement"). Navient has terminated the offering of such unsold and unissued securities under the Prior Registration Statement. Pursuant to Rule 457(p) under the Securities Act, the Registrant hereby offset the registration fee due under this Registration Statement by $16,529.81.</ffd:OfferingNote>
    <ffd:Rule457pOffsetFlg contextRef="ofst_1" id="ixv-274">true</ffd:Rule457pOffsetFlg>
    <ffd:OffsetPrrFilerNm contextRef="ofst_1" id="ixv-275">Navient Corporation</ffd:OffsetPrrFilerNm>
    <ffd:OffsetPrrFormTp contextRef="ofst_1" id="ixv-276">S-8</ffd:OffsetPrrFormTp>
    <ffd:OffsetPrrFileNb contextRef="ofst_1" id="ixv-277">333-279739</ffd:OffsetPrrFileNb>
    <ffd:OffsetClmInitlFilgDt contextRef="ofst_1" id="ixv-278">2024-05-28</ffd:OffsetClmInitlFilgDt>
    <ffd:OffsetClmdAmt contextRef="ofst_1" decimals="2" id="ixv-279" unitRef="USD">16529.81</ffd:OffsetClmdAmt>
    <ffd:OffsetPrrSctyTp contextRef="ofst_1" id="ixv-280">Equity</ffd:OffsetPrrSctyTp>
    <ffd:OffsetPrrSctyTitl contextRef="ofst_1" id="ixv-281">Common Stock, $0.01 par value per share</ffd:OffsetPrrSctyTitl>
    <ffd:OffsetPrrNbOfUnsoldScties
      contextRef="ofst_1"
      decimals="0"
      id="ixv-282"
      unitRef="Shares">7338831</ffd:OffsetPrrNbOfUnsoldScties>
    <ffd:OffsetPrrUnsoldOfferingAmt contextRef="ofst_1" decimals="2" id="ixv-283" unitRef="USD">111990561.06</ffd:OffsetPrrUnsoldOfferingAmt>
    <ffd:Rule457pOffsetFlg contextRef="ofst_2" id="ixv-284">true</ffd:Rule457pOffsetFlg>
    <ffd:OffsetPrrFilerNm contextRef="ofst_2" id="ixv-285">Navient Corporation</ffd:OffsetPrrFilerNm>
    <ffd:OffsetPrrFormTp contextRef="ofst_2" id="ixv-286">S-8</ffd:OffsetPrrFormTp>
    <ffd:OffsetPrrFileNb contextRef="ofst_2" id="ixv-287">333-279739</ffd:OffsetPrrFileNb>
    <ffd:OffsetSrcFilgDt contextRef="ofst_2" id="ixv-288">2024-05-28</ffd:OffsetSrcFilgDt>
    <ffd:OffsetPrrFeeAmt contextRef="ofst_2" decimals="2" id="ixv-289" unitRef="USD">16529.81</ffd:OffsetPrrFeeAmt>
    <ffd:TermntnCmpltnWdrwl contextRef="ofst_1" id="ixv-290">Navient previously paid registration fees of $16,529.81 associated with certain unsold and unissued securities from the Prior Registration Statement. Navient has terminated the offering of such unsold and unissued securities under the Prior Registration Statement. Pursuant to Rule 457(p) under the Securities Act, the Registrant hereby offsets the registration fee due under this Registration Statement by $16,529.81.</ffd:TermntnCmpltnWdrwl>
    <ffd:OffsetNote contextRef="ofst_2" id="ixv-291">Navient previously paid registration fees of $16,529.81 associated with certain unsold and unissued securities from the Prior Registration Statement. Navient has terminated the offering of such unsold and unissued securities under the Prior Registration Statement. Pursuant to Rule 457(p) under the Securities Act, the Registrant hereby offsets the registration fee due under this Registration Statement by $16,529.81.</ffd:OffsetNote>
</xbrl>
