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      id="b8552572-cd89-4869-a9fa-1b220759cd77"
      unitRef="pure">0.0407</oef:AnnlRtrPct>
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      id="apid_847c1ee1-9626-4ca6-89c7-cfbb58eb2939">N-1A</dei:EntityInvCompanyType>
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      id="apid_3fef9849-1acc-4da4-a120-5cca02d817f7">ELFUN GOVERNMENT MONEY MARKET FUND</dei:EntityRegistrantName>
    <oef:ProspectusDate
      contextRef="D_31Dec2025_31Dec2025"
      id="apid_8049f850-b34d-48ba-a69c-9e5934cb89ea">2026-04-30</oef:ProspectusDate>
    <oef:ObjectiveHeading
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      id="x_08517ba1-ca87-4bbb-9e27-65e82a41cbed">&lt;span style="color:#000000;font-family:Arial;font-size:10.02pt;font-weight:bold;"&gt;Investment Objective&lt;/span&gt;</oef:ObjectiveHeading>
    <oef:ObjectivePrimaryTextBlock
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      id="d35ab719-8c1c-4992-b3a3-8376e5259494">&lt;span style="color:#000000;font-family:Arial;font-size:10.02pt;margin-left:0%;"&gt;Elfun Government Money Market Fund (the &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:10.02pt;"&gt;&#x201c;Fund&#x201d;) seeks a high level of current income consistent with prudent investment management and the preservation of capital.&lt;/span&gt;</oef:ObjectivePrimaryTextBlock>
    <oef:ExpenseHeading
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      id="f4abc836-973d-43eb-b1a5-4cbc68953775">&lt;span style="color:#000000;font-family:Arial;font-size:10.02pt;font-weight:bold;"&gt;Fees and Expenses of the Fund&lt;/span&gt;</oef:ExpenseHeading>
    <oef:ExpenseNarrativeTextBlock
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      id="x_4d5d998b-6447-4637-b3cf-bc1272c05905">&lt;span style="color:#000000;font-family:Arial;font-size:10.02pt;margin-left:0%;"&gt;The tables below describe the fees and expenses that you may pay if you buy, hold, and sell shares of the Fund (&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:10.02pt;"&gt;&#x201c;Fund &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:10.02pt;margin-left:0%;"&gt;Shares&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:10.02pt;"&gt;&#x201d;). &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:10.02pt;font-weight:bold;"&gt;You may pay other fees, such as&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:10.02pt;font-weight:bold;line-height:12.02pt;"&gt;&#x2009;&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:10.02pt;font-weight:bold;"&gt;brokerage commissions and other fees to financial intermediaries which are not reflected in the tables and examples below.&lt;/span&gt;</oef:ExpenseNarrativeTextBlock>
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      contextRef="S000011834"
      id="dd06d260-98a4-4d21-a3ec-843475407d21">&lt;span style="color:#000000;font-family:Arial;font-size:10.02pt;font-weight:bold;"&gt;Shareholder Fees&#x2002;&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.02pt;"&gt;(fees paid directly from your investment)&lt;/span&gt;</oef:ShareholderFeesCaption>
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      unitRef="pure">0</oef:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice>
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      decimals="4"
      id="c63ad83d-b7e1-4413-9f3f-87e5611fac40"
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      contextRef="S000011834"
      id="x_20c886cf-f6d0-4e98-afa3-ba1795946961">&lt;span style="color:#000000;font-family:Arial;font-size:10.02pt;font-weight:bold;"&gt;Annual Fund Operating Expenses&#x2002;&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.02pt;"&gt;(expenses that you pay each year as a percentage of the value of your investment)&lt;/span&gt;</oef:OperatingExpensesCaption>
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      contextRef="S000011834_C000032336"
      decimals="4"
      id="x_7701c778-de83-487d-a050-8e30c8b3c03b"
      unitRef="pure">0.0010</oef:ManagementFeesOverAssets>
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      contextRef="S000011834_C000032336"
      decimals="4"
      id="aa47d8a8-39a1-490e-9c6b-aa3c9355a7e0"
      unitRef="pure">0.0019</oef:OtherExpensesOverAssets>
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      contextRef="S000011834_C000032336"
      decimals="4"
      id="x_625406ae-0dbe-426d-a0b5-fd6d2a853d14"
      unitRef="pure">0.0029</oef:ExpensesOverAssets>
    <oef:ExpenseExampleHeading
      contextRef="S000011834"
      id="x_630b2066-61db-4859-a5d2-0bcc3eaa61e2">&lt;span style="color:#000000;font-family:Arial;font-size:10.02pt;font-weight:bold;"&gt;Example&lt;/span&gt;</oef:ExpenseExampleHeading>
    <oef:ExpenseExampleNarrativeTextBlock
      contextRef="S000011834"
      id="f99e233c-6195-45a2-a4e7-5f2afd67d6d7">&lt;span style="color:#000000;font-family:Arial;font-size:10.02pt;margin-left:0%;"&gt;This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual&#160;funds. The Example assumes that you invest $10,000 in the Fund for the time periods indicated, and then sell or hold all of your Fund Shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund's operating expenses remain the same. Although your actual costs may be higher or lower, based on &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:10.02pt;"&gt;these assumptions your costs would be:&lt;/span&gt;</oef:ExpenseExampleNarrativeTextBlock>
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      decimals="INF"
      id="b77d0115-e0d5-4d04-a107-d7efba0f275e"
      unitRef="USD">30</oef:ExpenseExampleYear01>
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      decimals="INF"
      id="f4617217-dd39-41c0-a6ba-db89f235f5c5"
      unitRef="USD">93</oef:ExpenseExampleYear03>
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      decimals="INF"
      id="fbeb90bb-86bc-4bf6-97fd-9d3122dcde69"
      unitRef="USD">163</oef:ExpenseExampleYear05>
    <oef:ExpenseExampleYear10
      contextRef="S000011834_C000032336"
      decimals="INF"
      id="x_7402326c-c0a0-4075-803b-6cfdc4debd0b"
      unitRef="USD">368</oef:ExpenseExampleYear10>
    <oef:StrategyHeading
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      id="x_49c6cfce-59f6-493f-bba8-8d04da4dd041">&lt;span style="color:#000000;font-family:Arial;font-size:10.02pt;font-weight:bold;"&gt;Principal Investment Strategies&lt;/span&gt;</oef:StrategyHeading>
    <oef:StrategyNarrativeTextBlock
      contextRef="S000011834"
      id="x_3ca94230-cec7-4343-9438-e03cf15c61c4">&lt;span style="color:#000000;font-family:Arial;font-size:10.02pt;margin-left:0%;"&gt;The Elfun Government Money Market Fund is a government money market fund and invests only in obligations issued or guaranteed as to principal and/or interest, as applicable, by the U.S. government or its agencies and instrumentalities, as well as repurchase agreements secured by such instruments. The Fund may hold a portion of its assets in cash &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:10.02pt;"&gt;pending investment, to satisfy redemption requests or to meet the Fund's other cash management needs. &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:10.02pt;margin-left:0%;"&gt;The Fund follows a disciplined investment process that attempts to provide stability of principal, liquidity and current income, by investing in U.S. government securities. Among other things, SSGA FM, the investment adviser to the Fund, conducts its own credit analyses of potential investments and portfolio holdings, and relies substantially on a dedicated short-term credit research team. The Fund invests in accordance with regulatory requirements applicable to money market funds. Regulations require, among other things, a money market fund to invest only in short-term, high quality debt obligations (generally, securities that have remaining maturities of 397 calendar days or less, with the exception of certain floating rate securities that may have final maturities longer than 397 days but use maturity shortening provisions to meet the 397 day requirement, and that the Fund believes present minimal credit risk), to maintain a maximum dollar-weighted average maturity and dollar-weighted average life of 60 days or less and 120 days or less, respectively, and to meet requirements as to portfolio diversification and liquidity. All securities held by the Fund are U.S. dollar-denominated, &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:10.02pt;"&gt;and they may have fixed, variable or floating interest rates. &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:10.02pt;"&gt;The Fund attempts to meet its investment objective by investing in: &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:10.02pt;"&gt;&#x2022;&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:10.02pt;"&gt;Obligations issued or guaranteed as to principal and/or interest, as applicable, by the U.S. government or its agencies and instrumentalities, such as U.S. Treasury securities and securities issued by the Government National Mortgage Association (&#x201c;Ginnie Mae&#x201d;), which are backed by the full faith and credit of the United States; obligations issued or guaranteed by the Federal Home Loan Mortgage Corporation (&#x201c;Freddie Mac&#x201d;), the Federal National Mortgage Association (&#x201c;Fannie Mae&#x201d;); and &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:10.02pt;"&gt;&#x2022;&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:10.02pt;"&gt;U.S. government-sponsored entities such as the Federal Home Loan Bank, and the Federal Farm Credit Banks Funding Corporation, which are not backed by the full faith and credit of the United States; and &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:10.02pt;"&gt;&#x2022;&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:10.02pt;"&gt;Repurchase agreements collateralized by U.S. government securities.&lt;/span&gt;</oef:StrategyNarrativeTextBlock>
    <oef:RiskTextBlock
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      id="x_11cfaaf0-ff50-457c-8be4-f5b7be098925">&lt;span style="color:#000000;font-family:Arial;font-size:10.02pt;"&gt;You could lose money by investing in the Fund. &lt;/span&gt;</oef:RiskTextBlock>
    <oef:RiskTextBlock
      contextRef="S000011834_RiskMoneyMarketFundMayNotPreserveDollarMember"
      id="x_0691bc0b-b7df-416b-924c-469e1839708e">&lt;span style="color:#000000;font-family:Arial;font-size:10.02pt;"&gt;Although the Fund seeks to &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:10.02pt;margin-left:0%;"&gt;preserve the value of your investment at $1.00 per share, it cannot guarantee it will do so.&lt;/span&gt;</oef:RiskTextBlock>
    <oef:RiskTextBlock
      contextRef="S000011834_RiskNotInsuredDepositoryInstitutionMember"
      id="x_43ca61d0-8037-4d21-a0ac-0021181e347c">&lt;span style="color:#000000;font-family:Arial;font-size:10.02pt;font-weight:bold;"&gt; An investment in the Fund &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:10.02pt;font-weight:bold;margin-left:0%;"&gt;is subject to investment risks, including possible loss of principal, is not a deposit in a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation (&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:10.02pt;font-weight:bold;"&gt;&#x201c;FDIC&#x201d;) or any other government agency. &lt;/span&gt;</oef:RiskTextBlock>
    <oef:RiskTextBlock
      contextRef="S000011834_RiskMoneyMarketFundSponsorMayNotProvideSupportMember"
      id="x_40dd1679-37ad-4e76-ac3a-3e7ed05024fa">&lt;span style="color:#000000;font-family:Arial;font-size:10.02pt;"&gt;The &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:10.02pt;margin-left:0%;"&gt;Fund's sponsor is not required to reimburse the Fund for losses, and you should not expect that the sponsor will provide financial support to the Fund at any time, including during periods of market stress.&lt;/span&gt;</oef:RiskTextBlock>
    <oef:RiskTextBlock
      contextRef="S000011834_MoneyMarketRiskMember"
      id="c939fe44-df65-4ade-85b8-3f735b5a49d1">&lt;span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;margin-left:0.00%;"&gt;Money Market Fund Risk:&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:10pt;"&gt; An investment in a money market fund is not a deposit of any bank and is not insured or &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:10pt;margin-left:0.00%;"&gt;guaranteed by the FDIC or any other government agency. Although a money market fund generally seeks to preserve the value of its shares at $1.00 per share, there can be no assurance that it will do so, and it is possible to lose money by investing in a money market fund. A major or unexpected change in interest rates or a decline in the credit quality of an issuer or entity providing credit support, an inactive trading market for money market instruments, or adverse market, economic, industry, political, regulatory, geopolitical, and other conditions could cause a money market&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:10pt;"&gt; fund's share price to fall below $1.00.&lt;/span&gt;</oef:RiskTextBlock>
    <oef:RiskTextBlock
      contextRef="S000011834_USGovernmentSecuritiesRiskMember"
      id="a3a10335-1446-4eaa-94d4-0fcaf96810ab">&lt;span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;margin-left:0.00%;"&gt;U.S. Government Securities Risk:&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:10pt;"&gt; Certain U.S. government securities are supported by the full faith and credit of &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:10pt;margin-left:0.00%;"&gt;the United States; others are supported by the right of the issuer to borrow from the U.S. Treasury; others are supported by the discretionary authority of the U.S. government to purchase the agency's obligations; and still others are supported only by the credit of the issuing agency, instrumentality, or enterprise. Although U.S. government-sponsored enterprises such as the Federal Home Loan Mortgage Corporation (&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:10pt;"&gt;&#x201c;Freddie Mac&#x201d;) and the Federal National &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:10pt;margin-left:0.00%;"&gt;Mortgage Association (&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:10pt;"&gt;&#x201c;Fannie Mae&#x201d;) may be chartered or sponsored by Congress, they are not funded by Congressional&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:10pt;margin-left:0.00%;"&gt; appropriations, and their securities are not issued by the U.S. Treasury, are not supported by the full faith and &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:10pt;"&gt;credit of the U.S. government, and involve increased credit risks.&lt;/span&gt;</oef:RiskTextBlock>
    <oef:RiskTextBlock
      contextRef="S000011834_RepurchaseAgreementRiskMember"
      id="x_3dd8ca9f-314a-4f05-815b-2a6d9e9366a0">&lt;span style="font-family:Arial;font-size:10pt;font-weight:bold;margin-left:0.00%;"&gt;Repurchase Agreement Risk:&lt;/span&gt;&lt;span style="font-family:Arial;font-size:10pt;"&gt; Repurchase agreements may be viewed as loans made by the Fund, which are collateralized&lt;/span&gt;&lt;span style="font-family:Arial;font-size:10pt;margin-left:0.00%;"&gt; by the securities subject to repurchase. If the Fund's counterparty should default on its obligations and the Fund is delayed or prevented from recovering the collateral, or if the value of the collateral is insufficient, the &lt;/span&gt;&lt;span style="font-family:Arial;font-size:10pt;"&gt;Fund may realize a loss.&lt;/span&gt;</oef:RiskTextBlock>
    <oef:RiskTextBlock
      contextRef="S000011834_StableSharePriceRiskMember"
      id="d1814321-08dd-4ae1-a136-ca65288018c2">&lt;span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;margin-left:0.00%;"&gt;Stable Share Price Risk:&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:10pt;"&gt; If the market value of one or more of the Fund's investments changes substantially, the &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:10pt;margin-left:0.00%;"&gt;Fund may not be able to maintain a stable share price of $1.00. This risk typically is higher during periods of rapidly changing interest rates or when issuer credit quality generally is falling, and is made worse when the Fund experiences&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:10pt;"&gt; significant redemption requests.&lt;/span&gt;</oef:RiskTextBlock>
    <oef:RiskTextBlock
      contextRef="S000011834_MarketRiskMember"
      id="x_9a7ef8e0-15e4-4651-9726-3c0426a66b91">&lt;span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;margin-left:0.00%;"&gt;Market Risk:&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:10pt;"&gt; The Fund's investments are subject to changes in general economic conditions, general market fluctuations&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:10pt;margin-left:0.00%;"&gt; and the risks inherent in investment in securities markets. Investment markets can be volatile and prices of investments can change substantially due to various factors including, but not limited to, economic growth or recession, changes in interest rates, inflation, changes in the actual or perceived creditworthiness of issuers, and general market liquidity. The Fund is subject to the risk that geopolitical events will disrupt securities markets and adversely affect global economies and markets. Local, regional or global events such as war, military conflicts, acts of terror &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:10pt;margin-left:0.00%;"&gt;ism, trade policy changes or disputes, the threat or actual imposition of tariffs, natural disasters, the spread of infectious illness or other public health issues, or other events could have a significant impact on the Fund and its investments.&lt;/span&gt;</oef:RiskTextBlock>
    <oef:RiskTextBlock
      contextRef="S000011834_LowShortTermInterestRateRiskMember"
      id="x_366dc761-578b-4a96-849f-127c341f16e3">&lt;span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;margin-left:0.00%;"&gt;Low Short-Term Interest Rates:&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:10pt;"&gt; During market conditions in which short-term interest rates are at low levels, the &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:10pt;margin-left:0.00%;"&gt;Fund's yield can be very low. During these conditions, it is possible that the Fund will generate an insufficient amount of income to pay its expenses, and that it will not be able to pay a daily dividend and may have a negative yield (i.e., it may lose money on an operating basis). It is possible that the Fund would, during these conditions, maintain a substantial&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:10pt;"&gt; portion of its assets in cash, on which it may earn little, if any, income.&lt;/span&gt;</oef:RiskTextBlock>
    <oef:RiskTextBlock
      contextRef="S000011834_CounterpartyRiskMember"
      id="e1c73325-aae2-429a-b66e-d299b60f3486">&lt;span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;margin-left:0.00%;"&gt;Counterparty Risk:&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:10pt;"&gt; The Fund will be subject to credit risk with respect to the counterparties with which the Fund &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:10pt;margin-left:0.00%;"&gt;enters into derivatives contracts, repurchase agreements, reverse repurchase agreements, and other transactions. If a counterparty fails to meet its contractual obligations, the Fund may be unable to terminate or realize any gain on the investment or transaction, or to recover collateral posted to the counterparty, resulting in a loss to the Fund. If the Fund holds collateral posted by its counterparty, it may be delayed or prevented from realizing on the collateral in the &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:10pt;"&gt;event of a bankruptcy or insolvency proceeding relating to the counterparty.&lt;/span&gt;</oef:RiskTextBlock>
    <oef:RiskTextBlock
      contextRef="S000011834_DebtSecuritiesRiskMember"
      id="x_573c2ade-72ac-4f65-9d3e-a937a340f62a">&lt;span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;margin-left:0.00%;"&gt;Debt Securities Risk:&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:10pt;"&gt; The values of debt securities may increase or decrease as a result of the following: market &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:10pt;margin-left:0.00%;"&gt;fluctuations, changes in interest rates, actual or perceived inability or unwillingness of issuers, guarantors or liquidity providers to make scheduled principal or interest payments, or illiquidity in debt securities markets. To the extent that interest rates rise, certain underlying obligations may be paid off substantially slower than originally anticipated and the value of those securities may fall sharply. A rising interest rate environment may cause the value of the Fund's fixed income securities to decrease, an adverse impact on the liquidity of the Fund's fixed income securities, and increased volatility of the fixed income markets. During periods when interest rates are at low levels, the Fund's yield can be low, and the Fund may have a negative yield (i.e., it may lose money on an operating basis). To the extent that interest rates fall, certain underlying obligations may be paid off substantially faster than originally anticipated. If the principal on a debt obligation is prepaid before expected, the prepayments of principal may have to be reinvested in obligations paying interest at lower rates. During periods of falling interest rates, the income received by the Fund may decline. Changes in interest rates will likely have a greater effect on the values of debt securities of longer durations. Returns on investments in debt securities could trail the returns on other investment options, including investments in equity securities. High levels of inflation and/or a significantly changing interest rate environment&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:10pt;"&gt; can lead to heightened levels of volatility and reduced liquidity.&lt;/span&gt;</oef:RiskTextBlock>
    <oef:RiskTextBlock
      contextRef="S000011834_IncomeRiskMember"
      id="x_4c072612-69f1-4c2e-a21c-3e02e44deb0a">&lt;span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;margin-left:0.00%;"&gt;Income Risk:&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:10pt;"&gt; The Fund's income may decline due to falling interest rates or other factors. Issuers of securities held &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:10pt;margin-left:0.00%;"&gt;by the Fund may call or redeem the securities during periods of falling interest rates, and the Fund would likely be required to reinvest in securities paying lower interest rates. If an obligation held by the Fund is prepaid, the Fund &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:10pt;"&gt;may have to reinvest the prepayment in other obligations paying income at lower rates.&lt;/span&gt;</oef:RiskTextBlock>
    <oef:RiskTextBlock
      contextRef="S000011834_MortgageRelatedandOtherAssetBackedSecuritiesRiskMember"
      id="x_96212ad6-56a1-407d-a00f-934f1c43d57e">&lt;span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;margin-left:0.00%;"&gt;Mortgage-Related and Other Asset-Backed Securities Risk:&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:10pt;"&gt; Investments in mortgage-related and other asset-backed&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:10pt;margin-left:0.00%;"&gt; securities are subject to the risk of significant credit downgrades, illiquidity, and defaults to a greater extent than many other types of fixed-income investments. The liquidity of mortgage-related and asset-backed securities may change over time. During periods of falling interest rates, mortgage- and asset-backed securities may be called or prepaid, which may result in the Fund having to reinvest proceeds in other investments at a lower interest rate. During periods of rising interest rates, the average life of mortgage- and asset-backed securities may extend, which may lock in a below-market interest rate, increase the security's duration and interest rate sensitivity, and reduce the value of the security. Enforcing rights against the underlying assets or collateral may be difficult, and the underlying &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:10pt;"&gt;assets or collateral may be insufficient if the issuer defaults.&lt;/span&gt;</oef:RiskTextBlock>
    <oef:RiskTextBlock
      contextRef="S000011834_RapidChangesinInterestRatesRiskMember"
      id="x_667160ee-9afa-4061-9e9d-d72c3b8d3dae">&lt;span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;margin-left:0.00%;"&gt;Rapid Changes in Interest Rates Risk:&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:10pt;"&gt; Rapid changes in interest rates may cause significant requests to redeem Fund Shares, and possibly cause the Fund to sell portfolio securities at a loss to satisfy those requests.&lt;/span&gt;</oef:RiskTextBlock>
    <oef:RiskTextBlock
      contextRef="S000011834_SignificantExposuretoUSGovernmentAgenciesorInstrumentalitiesRiskMember"
      id="x_2ea5e5a2-edde-4f33-8d4a-3a9d8e460198">&lt;span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;margin-left:0.00%;"&gt;Significant Exposure to U.S. Government Agencies or Instrumentalities Risk:&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:10pt;"&gt; To the extent the Fund focuses &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:10pt;margin-left:0.00%;"&gt;its investments in securities issued or guaranteed by U.S. government agencies or instrumentalities, any market movements, regulatory changes or changes in political or economic conditions that affect the U.S. government agencies or instrumentalities in which the Fund invests may have a significant impact on the Fund's performance. Events &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:10pt;margin-left:0.00%;"&gt;that would adversely affect the market prices of securities issued or guaranteed by one government agency or instrumentality may adversely affect the market price of securities issued or guaranteed by other government agencies or &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:10pt;"&gt;instrumentalities.&lt;/span&gt;</oef:RiskTextBlock>
    <oef:RiskTextBlock
      contextRef="S000011834_USTreasuryObligationsRiskMember"
      id="x_7820fc17-3714-4922-8484-c6f1eb50a8ab">&lt;span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;margin-left:0.00%;"&gt;U.S. Treasury Obligations Risk:&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:10pt;"&gt; U.S. Treasury obligations may differ from other fixed income securities in their &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:10pt;margin-left:0.00%;"&gt;interest rates, maturities, times of issuance and other characteristics. Similar to other issuers, changes to the financial condition or credit rating of the U.S. government may cause the value of the Fund's U.S. Treasury obligations to &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:10pt;"&gt;decline.&lt;/span&gt;</oef:RiskTextBlock>
    <oef:RiskTextBlock
      contextRef="S000011834_VariableandFloatingRateSecuritiesRiskMember"
      id="x_91ad99e9-b5e2-49d9-a370-cec1b6296e01">&lt;span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;margin-left:0.00%;"&gt;Variable and Floating Rate Securities Risk:&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:10pt;"&gt; During periods of increasing interest rates, changes in the coupon &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:10pt;margin-left:0.00%;"&gt;rates of variable or floating rate securities may lag behind the changes in market rates or may have limits on the maximum increases in coupon rates. Alternatively, during periods of declining interest rates, the coupon rates on such securities will typically readjust downward resulting in a lower yield. In addition, investment in derivative variable rate securities, such as inverse floaters, whose rates vary inversely with market rates of interest, or range floaters or capped floaters, whose rates are subject to periodic or lifetime caps, or in securities that pay a rate of interest determined by applying a multiple to the variable rate involves special risks as compared to investment in a fixed-rate security and may involve leverage. Floating rate notes are generally subject to legal or contractual restrictions &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:10pt;"&gt;on resale, may trade infrequently, and their value may be impaired when the Fund needs to liquidate such securities.&lt;/span&gt;</oef:RiskTextBlock>
    <oef:BarChartAndPerformanceTableHeading
      contextRef="S000011834"
      id="x_2ebf2546-b5f2-4e57-9716-3c54ab347cf8">&lt;span style="color:#000000;font-family:Arial;font-size:10.02pt;font-weight:bold;"&gt;Performance&lt;/span&gt;</oef:BarChartAndPerformanceTableHeading>
    <oef:PerformanceNarrativeTextBlock
      contextRef="S000011834"
      id="c00a7268-b39b-4c58-b201-c2cd9a8c7048">&lt;span style="font-family:Arial;font-size:10.02pt;margin-left:0%;"&gt;The bar chart and table below provide some indication of the risks of investing in the Fund by illustrating the variability of the Fund's returns from year-to-year&#160;and by showing how the Fund's average annual returns for the periods indicated compared with those of a broad measure of market performance. &lt;/span&gt;&lt;span style="font-family:Arial;font-size:10.02pt;"&gt;The Fund's past performance does not necessarily&lt;/span&gt;&lt;span style="font-family:Arial;font-size:10.02pt;margin-left:0%;"&gt; indicate how the Fund will perform in the future.&lt;/span&gt;&lt;span style="font-family:Arial;font-size:10.02pt;margin-left:0%;"&gt;Current performance information for the Fund is available toll free by calling &lt;/span&gt;&lt;span style="font-family:Arial;font-size:10.02pt;"&gt;(800)-242-0134&lt;/span&gt;&lt;span style="font-family:Arial;font-size:10.02pt;"&gt; or by visiting our website &lt;/span&gt;&lt;span style="font-family:Arial;font-size:10.02pt;"&gt;at &lt;/span&gt;&lt;span style="font-family:Arial;font-size:10.02pt;"&gt;www.statestreet.com/im&lt;/span&gt;&lt;span style="font-family:Arial;font-size:10.02pt;"&gt;.&lt;/span&gt;</oef:PerformanceNarrativeTextBlock>
    <oef:PerformanceInformationIllustratesVariabilityOfReturns
      contextRef="S000011834"
      id="afe634d2-0204-4797-b81d-2ddcbd757b7a">&lt;span style="font-family:Arial;font-size:10.02pt;margin-left:0%;"&gt;The bar chart and table below provide some indication of the risks of investing in the Fund by illustrating the variability of the Fund's returns from year-to-year&#160;and by showing how the Fund's average annual returns for the periods indicated compared with those of a broad measure of market performance. &lt;/span&gt;</oef:PerformanceInformationIllustratesVariabilityOfReturns>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="S000011834"
      id="x_8846c3c1-1f05-4f6a-8077-6119d441ed26">&lt;span style="font-family:Arial;font-size:10.02pt;"&gt;The Fund's past performance does not necessarily&lt;/span&gt;&lt;span style="font-family:Arial;font-size:10.02pt;margin-left:0%;"&gt; indicate how the Fund will perform in the future.&lt;/span&gt;</oef:PerformancePastDoesNotIndicateFuture>
    <oef:PerformanceAvailabilityPhone
      contextRef="S000011834"
      id="x_34719804-2710-43c1-a0e6-7decec072e53">&lt;span style="font-family:Arial;font-size:10.02pt;"&gt;(800)-242-0134&lt;/span&gt;</oef:PerformanceAvailabilityPhone>
    <oef:PerformanceAvailabilityWebSiteAddress
      contextRef="S000011834"
      id="x_279f791d-02ac-4e80-98c1-e67be73b311c">&lt;span style="font-family:Arial;font-size:10.02pt;"&gt;www.statestreet.com/im&lt;/span&gt;</oef:PerformanceAvailabilityWebSiteAddress>
    <oef:BarChartHeading
      contextRef="S000011834"
      id="x_784adbea-afe1-47fd-a57d-bff07fcc8cbc">&lt;span style="color:#000000;font-family:Arial;font-size:10.02pt;font-weight:bold;"&gt;Annual Total Returns &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:9.02pt;"&gt;(years ended 12/31)&lt;/span&gt;</oef:BarChartHeading>
    <oef:BarChartClosingTextBlock
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      id="x_2a4baed8-4e5e-4970-b107-78998b170de5">&lt;span style="font-family:Arial;font-size:10pt;font-weight:bold;"&gt;Returns&lt;/span&gt;&lt;span style="font-family:Arial;font-size:10pt;font-weight:bold;"&gt;Quarter/Year&lt;/span&gt;&lt;span style="font-family:Arial;font-size:10pt;font-weight:bold;margin-left:0.0pt;"&gt;Highest Quarterly Return&lt;/span&gt;&lt;span style="font-family:Arial;font-size:10pt;"&gt;1.31%&lt;/span&gt;&lt;span style="font-family:Arial;font-size:10pt;"&gt;Q4 2023&lt;/span&gt;&lt;span style="font-family:Arial;font-size:10pt;font-weight:bold;margin-left:0.0pt;"&gt;Lowest Quarterly Return&lt;/span&gt;&lt;span style="font-family:Arial;font-size:10pt;"&gt;0.00%&lt;/span&gt;&lt;span style="font-family:Arial;font-size:10pt;"&gt;Q1 2016&lt;/span&gt;</oef:BarChartClosingTextBlock>
    <oef:HighestQuarterlyReturnLabel
      contextRef="S000011834_C000032336"
      id="d64c5878-1ee8-486d-b814-900406a9ceeb">&lt;span style="font-family:Arial;font-size:10pt;font-weight:bold;margin-left:0.0pt;"&gt;Highest Quarterly Return&lt;/span&gt;</oef:HighestQuarterlyReturnLabel>
    <oef:BarChartHighestQuarterlyReturn
      contextRef="S000011834_C000032336"
      decimals="4"
      id="x_86a73e1f-48cf-4139-b0ba-219725daed37"
      unitRef="pure">0.0131</oef:BarChartHighestQuarterlyReturn>
    <oef:BarChartHighestQuarterlyReturnDate
      contextRef="S000011834_C000032336"
      id="x_583e6a7a-dc42-43f3-b107-ef4580d60864">2023-12-31</oef:BarChartHighestQuarterlyReturnDate>
    <oef:LowestQuarterlyReturnLabel
      contextRef="S000011834_C000032336"
      id="f1094f4b-9485-4556-bd23-97c95abf8946">&lt;span style="font-family:Arial;font-size:10pt;font-weight:bold;margin-left:0.0pt;"&gt;Lowest Quarterly Return&lt;/span&gt;</oef:LowestQuarterlyReturnLabel>
    <oef:BarChartLowestQuarterlyReturn
      contextRef="S000011834_C000032336"
      decimals="4"
      id="x_7984de38-8c58-48d1-83a2-e830bb0448ac"
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    <oef:BarChartLowestQuarterlyReturnDate
      contextRef="S000011834_C000032336"
      id="e6e2b6ca-4b59-4a72-883e-136970061709">2016-03-31</oef:BarChartLowestQuarterlyReturnDate>
    <oef:PerformanceTableHeading
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      id="x_8ab2e8ed-515d-4c5e-b589-75173175ad16">&lt;span style="font-family:Arial;font-size:10.02pt;font-weight:bold;"&gt;Average Annual Total Returns &lt;/span&gt;&lt;span style="font-family:Arial;font-size:9.02pt;"&gt;(for periods ended 12/31/25)&lt;/span&gt;</oef:PerformanceTableHeading>
    <oef:AvgAnnlRtrPct
      contextRef="C000032336_01Jan2025_31Dec2025"
      decimals="4"
      id="fb12d4ce-2169-4ae5-8258-742b6b5695d5"
      unitRef="pure">0.0407</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="C000032336_01Jan2021_31Dec2025"
      decimals="4"
      id="x_373662b4-522c-488f-9c0d-1bdb17cb1a60"
      unitRef="pure">0.0308</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="C000032336_01Jan2016_31Dec2025"
      decimals="4"
      id="bbacb41f-8914-4ca5-a188-25bf92bd3023"
      unitRef="pure">0.0198</oef:AvgAnnlRtrPct>
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      id="x_75b1cb6d-6ab2-420e-89e7-a457eb703458">&lt;span style="color:#000000;font-family:Arial;font-size:10.02pt;"&gt;To obtain the Fund's current yield, please call &lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:10.02pt;"&gt;(800)-242-0134&lt;/span&gt;&lt;span style="color:#000000;font-family:Arial;font-size:10.02pt;"&gt;.&lt;/span&gt;</oef:PerformanceTableNarrativeTextBlock>
    <oef:MoneyMarketSevenDayYieldPhone
      contextRef="S000011834"
      id="acd542ae-4a58-4974-9167-27b755f86c41">&lt;span style="color:#000000;font-family:Arial;font-size:10.02pt;"&gt;(800)-242-0134&lt;/span&gt;</oef:MoneyMarketSevenDayYieldPhone>
</xbrl>