<?xml version="1.0" encoding="utf-8"?>
<xbrl
  xmlns="http://www.xbrl.org/2003/instance"
  xmlns:dei="http://xbrl.sec.gov/dei/2024"
  xmlns:ffd="http://xbrl.sec.gov/ffd/2024q2"
  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/2024q2/ffd-2024q2.xsd"
      xlink:type="simple"/>
    <context id="P10_29_2024To10_29_2024">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001130310</identifier>
        </entity>
        <period>
            <startDate>2024-10-29</startDate>
            <endDate>2024-10-29</endDate>
        </period>
    </context>
    <context id="P10_29_2024To10_29_2024_1TypedMemberffdOfferingAxis">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001130310</identifier>
            <segment>
                <xbrldi:typedMember dimension="ffd:OfferingAxis">
                    <dei:lineNo>1</dei:lineNo>
                </xbrldi:typedMember>
            </segment>
        </entity>
        <period>
            <startDate>2024-10-29</startDate>
            <endDate>2024-10-29</endDate>
        </period>
    </context>
    <unit id="Unit_USD">
        <measure>iso4217:USD</measure>
    </unit>
    <unit id="Unit_pure">
        <measure>pure</measure>
    </unit>
    <unit id="Unit_shares">
        <measure>shares</measure>
    </unit>
    <dei:EntityCentralIndexKey contextRef="P10_29_2024To10_29_2024" id="ixv-436">0001130310</dei:EntityCentralIndexKey>
    <dei:EntityRegistrantName contextRef="P10_29_2024To10_29_2024" id="hidden123661193">CENTERPOINT ENERGY INC</dei:EntityRegistrantName>
    <ffd:SubmissnTp contextRef="P10_29_2024To10_29_2024" id="hidden123660976">424B2</ffd:SubmissnTp>
    <ffd:FeeExhibitTp contextRef="P10_29_2024To10_29_2024" id="ixv-439">EX-FILING FEES</ffd:FeeExhibitTp>
    <ffd:PrevslyPdFlg
      contextRef="P10_29_2024To10_29_2024_1TypedMemberffdOfferingAxis"
      id="hidden123660979">false</ffd:PrevslyPdFlg>
    <ffd:TtlPrevslyPdAmt
      contextRef="P10_29_2024To10_29_2024"
      decimals="0"
      id="ixv-441"
      unitRef="Unit_USD">0</ffd:TtlPrevslyPdAmt>
    <ffd:OfferingSctyTp
      contextRef="P10_29_2024To10_29_2024_1TypedMemberffdOfferingAxis"
      id="ixv-466">Debt</ffd:OfferingSctyTp>
    <ffd:OfferingSctyTitl
      contextRef="P10_29_2024To10_29_2024_1TypedMemberffdOfferingAxis"
      id="ixv-172">6.700% Fixed-to-Fixed Reset Rate Junior Subordinated Notes, Series C, due 2055</ffd:OfferingSctyTitl>
    <ffd:Rule457rFlg
      contextRef="P10_29_2024To10_29_2024_1TypedMemberffdOfferingAxis"
      id="ixv-467">true</ffd:Rule457rFlg>
    <ffd:AmtSctiesRegd
      contextRef="P10_29_2024To10_29_2024_1TypedMemberffdOfferingAxis"
      decimals="0"
      id="ixv-468"
      unitRef="Unit_shares">500000000</ffd:AmtSctiesRegd>
    <ffd:MaxOfferingPricPerScty
      contextRef="P10_29_2024To10_29_2024_1TypedMemberffdOfferingAxis"
      decimals="0"
      id="ixv-469"
      unitRef="Unit_pure">1</ffd:MaxOfferingPricPerScty>
    <ffd:MaxAggtOfferingPric
      contextRef="P10_29_2024To10_29_2024_1TypedMemberffdOfferingAxis"
      decimals="0"
      id="ixv-470"
      unitRef="Unit_USD">500000000</ffd:MaxAggtOfferingPric>
    <ffd:FeeRate
      contextRef="P10_29_2024To10_29_2024_1TypedMemberffdOfferingAxis"
      decimals="INF"
      id="ixv-471"
      unitRef="Unit_pure">0.0001531</ffd:FeeRate>
    <ffd:FeeAmt
      contextRef="P10_29_2024To10_29_2024_1TypedMemberffdOfferingAxis"
      decimals="0"
      id="ixv-472"
      unitRef="Unit_USD">76550</ffd:FeeAmt>
    <ffd:TtlOfferingAmt
      contextRef="P10_29_2024To10_29_2024"
      decimals="0"
      id="ixv-473"
      unitRef="Unit_USD">500000000</ffd:TtlOfferingAmt>
    <ffd:TtlFeeAmt
      contextRef="P10_29_2024To10_29_2024"
      decimals="0"
      id="ixv-474"
      unitRef="Unit_USD">76550</ffd:TtlFeeAmt>
    <ffd:NetFeeAmt
      contextRef="P10_29_2024To10_29_2024"
      decimals="0"
      id="ixv-475"
      unitRef="Unit_USD">76550</ffd:NetFeeAmt>
    <ffd:OfferingNote
      contextRef="P10_29_2024To10_29_2024_1TypedMemberffdOfferingAxis"
      id="ixv-426">
&lt;table cellpadding="0" cellspacing="0" style="text-align:start; BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt;border:0;width:100%"&gt;
&lt;tr style="page-break-inside:avoid"&gt;
&lt;td style="width:4%;vertical-align:top;text-align:left;"&gt;(1)&lt;/td&gt;
&lt;td style="vertical-align:top;text-align:left;"&gt;&lt;div style="margin-top: 0pt; margin-bottom: 0pt; font-size: 10pt; font-family: &amp;quot;Times New Roman&amp;quot;; text-align: left; line-height: normal;"&gt;This registration fee table shall be deemed to update the &#x201c;Calculation of Registration Fee&#x201d; in the Company&#x2019;s Registration Statement on &lt;div style="white-space: nowrap; letter-spacing: 0px; top: 0px;display:inline;"&gt;&lt;div style="white-space: nowrap; letter-spacing: 0px; top: 0px;display:inline;"&gt;Form&#160;S-3&#160;(File&#160;No.&#160;333-272025)&#160;in&lt;/div&gt;&lt;/div&gt; accordance with Rules 456(b) and 457(r) under the Securities Act of 1933, as amended. &lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;&lt;/table&gt; </ffd:OfferingNote>
    <ffd:FormTp contextRef="P10_29_2024To10_29_2024" id="ixv-476">S-3</ffd:FormTp>
    <ffd:RegnFileNb contextRef="P10_29_2024To10_29_2024" id="ixv-477">333-272025</ffd:RegnFileNb>
</xbrl>
