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

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2015-11-10</periodOfReport>

    <issuer>
        <issuerCik>0000829224</issuerCik>
        <issuerName>STARBUCKS CORP</issuerName>
        <issuerTradingSymbol>SBUX</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001546165</rptOwnerCik>
            <rptOwnerName>Helm Lucy Lee</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>2401 UTAH AVE SOUTH, SUITE 800</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>SEATTLE</rptOwnerCity>
            <rptOwnerState>WA</rptOwnerState>
            <rptOwnerZipCode>98134</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isOfficer>1</isOfficer>
            <officerTitle>evp, gen. counsel &amp; secretary</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2015-11-10</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness></transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>73278</value>
                    <footnoteId id="F1"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>164911</value>
                    <footnoteId id="F2"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Restricted Stock Units (&quot;RSUs&quot;) earned on the achievement of performance goals under performance-based RSUs granted on November 11, 2013 and July 16, 2014.  The RSUs are scheduled to vest, subject to continued employment, as follows; 11,236 shares on each of November 11, 2015 and November 11, 2016, 30,484 shares on July 16, 2017, 10,162 shares on July 16, 2018 and 10,160 shares on July 16, 2019.</footnote>
        <footnote id="F2">On April 9, 2015, Starbucks Corporation effected a 2-for-1 stock split.  The number of shares reported throughout this Form 4 have been adjusted to reflect the stock split.  Includes 148 (split adjusted) shares purchased on March 31, 2015, 114 shares purchased on June 30, 2015 and 125 shares purchased on September 30, 2015, pursuant to the Starbucks Corporation Employee Stock Purchase Plan.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Robert L. Villasenor, attorney-in-fact for Lucy Lee Helm</signatureName>
        <signatureDate>2015-11-12</signatureDate>
    </ownerSignature>
</ownershipDocument>
