<?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">0002142558</identifier>
        </entity>
        <period>
            <startDate>2026-10-16</startDate>
            <endDate>2026-10-16</endDate>
        </period>
    </context>
    <context id="offrl_1">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0002142558</identifier>
            <segment>
                <xbrldi:typedMember dimension="ffd:OfferingAxis">
                    <dei:lineNo>1</dei:lineNo>
                </xbrldi:typedMember>
            </segment>
        </entity>
        <period>
            <startDate>2026-10-16</startDate>
            <endDate>2026-10-16</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-351">S-4</ffd:FormTp>
    <ffd:SubmissnTp contextRef="rc" id="ixv-352">S-4</ffd:SubmissnTp>
    <ffd:FeeExhibitTp contextRef="rc" id="ixv-353">EX-FILING FEES</ffd:FeeExhibitTp>
    <dei:EntityCentralIndexKey contextRef="rc" id="ixv-354">0002142558</dei:EntityCentralIndexKey>
    <dei:EntityRegistrantName contextRef="rc" id="ixv-355">Mobility (USA) 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-383">S-4</ffd:FormTp>
    <dei:EntityRegistrantName contextRef="rc" id="ixv-384">Mobility (USA) Corp</dei:EntityRegistrantName>
    <ffd:PrevslyPdFlg contextRef="offrl_1" id="ixv-385">false</ffd:PrevslyPdFlg>
    <ffd:OfferingSctyTp contextRef="offrl_1" id="ixv-386">Equity</ffd:OfferingSctyTp>
    <ffd:OfferingSctyTitl contextRef="offrl_1" id="ixv-387">Common stock, par value $0.01 per share</ffd:OfferingSctyTitl>
    <ffd:FeesOthrRuleFlg contextRef="offrl_1" id="ixv-388">true</ffd:FeesOthrRuleFlg>
    <ffd:AmtSctiesRegd
      contextRef="offrl_1"
      decimals="0"
      id="ixv-389"
      unitRef="Shares">103711128</ffd:AmtSctiesRegd>
    <ffd:MaxAggtOfferingPric
      contextRef="offrl_1"
      decimals="2"
      id="ixv-390"
      unitRef="USD">40950338890.80</ffd:MaxAggtOfferingPric>
    <ffd:FeeRate
      contextRef="offrl_1"
      decimals="6"
      id="ixv-391"
      unitRef="pure">0.000087</ffd:FeeRate>
    <ffd:FeeAmt
      contextRef="offrl_1"
      decimals="2"
      id="ixv-392"
      unitRef="USD">3562679.48</ffd:FeeAmt>
    <ffd:TtlOfferingAmt contextRef="rc" decimals="2" id="ixv-393" unitRef="USD">40950338890.80</ffd:TtlOfferingAmt>
    <ffd:TtlFeeAmt contextRef="rc" decimals="2" id="ixv-394" unitRef="USD">3562679.48</ffd:TtlFeeAmt>
    <ffd:TtlPrevslyPdAmt contextRef="rc" decimals="2" id="ixv-395" unitRef="USD">0.00</ffd:TtlPrevslyPdAmt>
    <ffd:TtlOffsetAmt contextRef="rc" decimals="2" id="ixv-396" unitRef="USD">0.00</ffd:TtlOffsetAmt>
    <ffd:NetFeeAmt contextRef="rc" decimals="2" id="ixv-397" unitRef="USD">3562679.48</ffd:NetFeeAmt>
    <ffd:Rule457fFlg contextRef="offrl_1" id="ixv-398">true</ffd:Rule457fFlg>
    <ffd:OfferingNote contextRef="offrl_1" id="ixv-399">(1) Represents an estimate of the maximum number of shares of common stock, par value $0.01 per share, of Mobility (USA) Corporation ("SpinCo common stock") issuable by Mobility (USA) Corporation ("SpinCo") to shareholders of Eaton Corporation plc ("Eaton") pursuant to the offer by Eaton to redeem all or a portion of the outstanding Ordinary Shares, par value $0.01 per share, of Eaton ("Eaton Ordinary Shares") that are validly tendered and not properly withdrawn, in exchange for the issuance of SpinCo common stock (the "Exchange Offer") and, in the event the Exchange Offer is not fully subscribed, the issuance by SpinCo of the remaining shares of SpinCo common stock on a pro rata basis to Eaton shareholders whose Eaton Ordinary Shares remain outstanding after consummation of the Exchange Offer (the "Clean-Up Spin-Off"), in each case upon completion of the transactions contemplated by the Separation and Distribution Agreement, dated as of June 10, 2026, by and among Eaton, Eaton Corporation ("Eaton Ohio"), Eaton Capital Unlimited Company, SpinCo and Dana Incorporated ("Dana") described in the registration statement on Forms S-4 and S-1 of SpinCo with which this exhibit is filed (the "Registration Statement"). Immediately following the Exchange Offer and any Clean-Up Spin-Off, shares of Dana common stock, other than the Merger Excluded Shares (as defined in the Registration Statement), will be converted into the right to receive shares of SpinCo common stock upon completion of the transactions contemplated by the Agreement and Plan of Merger, dated as of June 10, 2026, by and among Eaton, Eaton Ohio, SpinCo, Atlas Mobility Sub, Inc. and Dana (the "Merger Agreement") described in the Registration Statement. The shares of SpinCo common stock to be issued in the Merger are not being registered hereby and are being registered on a separate registration statement on Form S-4 of SpinCo, which was filed on October 19, 2026. Pursuant to Rule 416 under the Securities Act of 1933, as amended (the "Securities Act"), this registration statement also covers an indeterminate number of additional shares of SpinCo common stock as may be issuable as a result of stock splits, stock dividends or the like. It also includes SpinCo shares of common stock that may be issuable pursuant to the Eaton stock fund under the Eaton Savings Plan, the Eaton Personal Investment Plan and the Eaton Puerto Rico Retirement Savings Plan that may be exchanged in accordance with such plans. (2) Estimated solely for purposes of calculating the registration fee required by Section 6(b) of the Securities Act and computed pursuant to Rule 457(c) and Rule 457(f) under the Securities Act based on $394.85, the average of the high and low prices of the Eaton Ordinary Shares, reflecting that Eaton Ordinary Shares will be redeemed in exchange for the issuance of shares of SpinCo common stock pursuant to the Exchange Offer, as reported on the New York Stock Exchange on October 15, 2026, which amount represents the aggregate value of the Eaton Ordinary Shares to be acquired in the Exchange Offer, assuming Eaton elects to offer all of the shares of SpinCo common stock intended to be issued as part of the Exchange Offer, the Exchange Offer is fully subscribed and there is no discount to the per-share value of Eaton Ordinary Shares.</ffd:OfferingNote>
    <ffd:AmtSctiesRcvd
      contextRef="offrl_1"
      decimals="0"
      id="ixv-400"
      unitRef="Shares">103711128</ffd:AmtSctiesRcvd>
    <ffd:ValSctiesRcvdPerShr
      contextRef="offrl_1"
      decimals="2"
      id="ixv-401"
      unitRef="USD">394.85</ffd:ValSctiesRcvdPerShr>
    <ffd:ValSctiesRcvd
      contextRef="offrl_1"
      decimals="2"
      id="ixv-402"
      unitRef="USD">40950338890.80</ffd:ValSctiesRcvd>
    <ffd:FeeNoteMaxAggtOfferingPric
      contextRef="offrl_1"
      decimals="2"
      id="ixv-403"
      unitRef="USD">40950338890.80</ffd:FeeNoteMaxAggtOfferingPric>
</xbrl>
