<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0508</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2023-10-13</periodOfReport>

    <notSubjectToSection16>false</notSubjectToSection16>

    <issuer>
        <issuerCik>0000723125</issuerCik>
        <issuerName>MICRON TECHNOLOGY INC</issuerName>
        <issuerTradingSymbol>MU</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001689498</rptOwnerCik>
            <rptOwnerName>BHATIA MANISH H</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>8000 S. FEDERAL WAY</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>BOISE</rptOwnerCity>
            <rptOwnerState>ID</rptOwnerState>
            <rptOwnerZipCode>83716</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>false</isDirector>
            <isOfficer>true</isOfficer>
            <isTenPercentOwner>false</isTenPercentOwner>
            <isOther>false</isOther>
            <officerTitle>EVP, Global Operations</officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <aff10b5One>false</aff10b5One>

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                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
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            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
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                <equitySwapInvolved>false</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness></transactionTimeliness>
            <transactionAmounts>
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                    <footnoteId id="F1"/>
                </transactionShares>
                <transactionPricePerShare>
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                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>324863.00</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
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                <directOrIndirectOwnership>
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                </directOrIndirectOwnership>
            </ownershipNature>
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        <nonDerivativeTransaction>
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            </securityTitle>
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            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
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            <transactionTimeliness></transactionTimeliness>
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            </transactionCoding>
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                <transactionPricePerShare>
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            </transactionDate>
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                <equitySwapInvolved>false</equitySwapInvolved>
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                </sharesOwnedFollowingTransaction>
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            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>M</transactionCode>
                <equitySwapInvolved>false</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness></transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>12586.00</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0.00</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F11"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F11"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>11705.00</value>
                    <footnoteId id="F6"/>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>12587.00</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">Restricted Stock Award vests in 33 1/3% increments annually on the anniversary of the grant.</footnote>
        <footnote id="F10">Each performance-based restricted stock unit (&quot;PRSU&quot;) represents the right to receive, following vesting, a percentage of one share of common stock based upon the achievement of pre-established performance goals related to High Value NAND delivery and solutions over a 3-year performance period beginning September 3, 2021 and ending August 29, 2024 (subject to a 200% aggregate limit on the total target shares that may be received under the PRSUs awarded on October 13, 2021), and certification of such performance by the Compensation Committee.</footnote>
        <footnote id="F11">Each performance-based restricted stock unit (&quot;PRSU&quot;) represents the right to receive, following vesting, a percentage of one share of common stock based upon the achievement of pre-established performance goals related to relative total shareholder return over a 3-year performance period beginning September 3, 2021 and ending August 29, 2024 (subject to a 200% aggregate limit on the total target shares that may be received under the PRSUs awarded on October 13, 2021), and certification of such performance by the Compensation Committee.</footnote>
        <footnote id="F2">The Compensation Committee certified achievement of pre-established performance goals related to NAND delivery and solutions at 200% of target under the performance-based restricted stock units (&quot;PRSU&quot;) with a 3-year performance period previously awarded on October 16, 2020. As reported at grant, the PRSU could result in a payout (if earned) that varies (starting at 0%) based on actual achievement of the goals, subject to a 200% aggregate limit on the total target shares that may be received under the PRSUs awarded on October 16, 2020.  100% of any shares earned as a result of the achievement of the performance goals measured at the end of year 3 of the performance period as well as certain unvested shares earned as a result of the achievement of performance goals measured at the end of year 2 of the performance period which remained subject to vesting vested upon certification of the achievement of performance goals in year 3 of the performance period.</footnote>
        <footnote id="F3">Withholding of shares of common stock to satisfy tax withholding obligations in connection with the vesting of previously granted awards.</footnote>
        <footnote id="F4">The Compensation Committee certified achievement of pre-established performance goals related to relative total shareholder return at a level of 93% of target under the performance-based restricted stock units (&quot;PRSU&quot;) with a 3-year performance period previously awarded on October 16, 2020. As reported at grant, the PRSU could result in a payout (if earned) that varies (starting at 0%) based on actual achievement of the goals, subject to a 200% aggregate limit on the total target shares that may be received under the PRSUs awarded on October 16, 2020. 100% of any shares earned as a result of the achievement of the performance goals measured at the end of year 3 of the performance period as well as certain unvested shares earned as a result of the achievement of performance goals measured at the end of year 2 of the performance period which remained subject to vesting vested upon certification of the achievement of performance goals at the end of year 3 of the performance period.</footnote>
        <footnote id="F5">The Compensation Committee certified achievement of pre-established performance goals at a level of 33% of  target under the performance-based restricted stock units (&quot;PRSU&quot;) with a 3-year performance period previously awarded on October 13, 2021. As reported at grant, the PRSU could result in a payout (if earned) that varies (starting at 0%) based on actual achievement of the goals, subject to a 200% aggregate limit on the total target shares that may be received under the PRSUs awarded on October 13, 2021. 50% of the shares earned vested upon certification of the performance and 50% remain subject to vesting until the certification of the achievement of performance goals at the end of year 3 of the performance period.</footnote>
        <footnote id="F6">The Compensation Committee certified achievement of pre-established performance goals related to relative total shareholder return at a level of 93% of target under the performance-based restricted stock units (&quot;PRSU&quot;) with a 3-year performance period previously awarded on October 13, 2021. As reported at grant, the PRSU could result in a payout (if earned) that varies (starting at 0%) based on actual achievement of the goals, subject to a 200% aggregate limit on the total target shares that may be received under the PRSU awarded on October 13, 2021. 50% of the shares earned vested upon certification of the performance and 50% remain subject to vesting until the certification of performance goals at the end of year 3 of the performance period.</footnote>
        <footnote id="F7">Each performance-based restricted stock unit (&quot;PRSU&quot;) represents the right to receive, following vesting, a percentage of one share of common stock based upon the achievement of pre-established performance goals related to NAND delivery and solutions over a 3-year performance period beginning September 4, 2020 and ending August 31, 2023 (subject to a 200% aggregate limit on the total target shares that may be received under the PRSUs awarded on October 16, 2020), and certification of such performance by the Compensation Committee.</footnote>
        <footnote id="F8">Each performance-based restricted stock unit (&quot;PRSU&quot;) represents the right to receive, following vesting, a percentage of one share of common stock based upon the achievement of pre-established performance goals related to relative total shareholder return over a 3-year performance period beginning September 4, 2020 and ending August 31, 2023 (subject to a 200% aggregate limit on the total target shares that may be received under the PRSUs awarded on October 16, 2020), and certification of such performance by the Compensation Committee.</footnote>
        <footnote id="F9">Each performance-based restricted stock unit (&quot;PRSU&quot;) represents the right to receive, following vesting, a percentage of one share of common stock based upon the achievement of pre-established performance goals related to Data Center NAND delivery and solutions over a 3-year performance period beginning September 3, 2021 and ending August 29, 2024 (subject to a 200% aggregate limit on the total target shares that may be received under the PRSUs awarded on October 13, 2021), and certification of such performance by the Compensation Committee.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>Mai Lan Bui, Attorney-in-fact</signatureName>
        <signatureDate>2023-10-17</signatureDate>
    </ownerSignature>
</ownershipDocument>
