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<xbrl
  xmlns="http://www.xbrl.org/2003/instance"
  xmlns:dei="http://xbrl.sec.gov/dei/2023"
  xmlns:iso4217="http://www.xbrl.org/2003/iso4217"
  xmlns:link="http://www.xbrl.org/2003/linkbase"
  xmlns:rr="http://xbrl.sec.gov/rr/2023"
  xmlns:xlink="http://www.w3.org/1999/xlink">
    <link:schemaRef xlink:href="pgeox-20240722.xsd" xlink:type="simple"/>
    <context id="AsOf2024-07-22">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000081259</identifier>
        </entity>
        <period>
            <startDate>2024-07-22</startDate>
            <endDate>2024-07-22</endDate>
        </period>
    </context>
    <unit id="USD">
        <measure>iso4217:USD</measure>
    </unit>
    <unit id="Ratio">
        <measure>pure</measure>
    </unit>
    <dei:AmendmentFlag contextRef="AsOf2024-07-22" id="Fact000003">false</dei:AmendmentFlag>
    <dei:DocumentType contextRef="AsOf2024-07-22" id="Fact000004">497</dei:DocumentType>
    <dei:EntityRegistrantName contextRef="AsOf2024-07-22" id="Fact000005">George Putnam Balanced Fund</dei:EntityRegistrantName>
    <dei:EntityInvCompanyType contextRef="AsOf2024-07-22" id="Fact000006">N-1A</dei:EntityInvCompanyType>
    <dei:DocumentPeriodEndDate contextRef="AsOf2024-07-22" id="Fact000007">2023-12-31</dei:DocumentPeriodEndDate>
    <dei:EntityCentralIndexKey contextRef="AsOf2024-07-22" id="Fact000008">0000081259</dei:EntityCentralIndexKey>
    <rr:RiskReturnHeading contextRef="AsOf2024-07-22" id="Fact000012">For each
fund listed in Schedule A hereto:</rr:RiskReturnHeading>
    <rr:RiskTextBlock contextRef="AsOf2024-07-22" id="Fact000014">&lt;p id="xdx_A80_err--RiskTextBlock_zxWPgcOno2If" style="font: 11pt Times New Roman, Times, Serif; margin: 0 0 12pt; text-align: justify; background-color: white"&gt;Effective immediately,
the following disclosure is added under the heading &#x201c;Risks&#x201d; in the subsection &lt;i&gt;Investments, risks, and performance&lt;/i&gt; in
the section &lt;i&gt;Fund summary &lt;/i&gt;or &lt;i&gt;Fund summaries&lt;/i&gt; of the fund&#x2019;s prospectus:&lt;/p&gt;

&lt;p style="font: 11pt Times New Roman, Times, Serif; margin: 0 0 12pt 0.25in; text-align: justify; background-color: white"&gt;The fund may
be an investment option for mutual funds that are managed by Franklin Resources, Inc. (Franklin Templeton) and its affiliates as &#x201c;funds
of funds.&#x201d; Additionally, other investors from time to time may make substantial investments in the fund. Such shareholders may at
times be considered to control the fund. Dispositions of a large number of shares by these shareholders may adversely affect the fund&#x2019;s
liquidity and net assets. These redemptions may also force the fund to sell securities, which may increase the fund&#x2019;s brokerage
costs.&lt;/p&gt;

</rr:RiskTextBlock>
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