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

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2007-04-26</periodOfReport>

    <issuer>
        <issuerCik>0001143908</issuerCik>
        <issuerName>ACCENTURE SCA</issuerName>
        <issuerTradingSymbol>NONE</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001230066</rptOwnerCik>
            <rptOwnerName>ROHLEDER STEPHEN J</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O ACCENTURE</rptOwnerStreet1>
            <rptOwnerStreet2>5221 NORTH O'CONNOR BLVD., SUITE 1400</rptOwnerStreet2>
            <rptOwnerCity>IRVING</rptOwnerCity>
            <rptOwnerState>TX</rptOwnerState>
            <rptOwnerZipCode>75039</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>1</isOther>
            <otherText>See Footnote 1 below</otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Class I common shares</value>
                <footnoteId id="F1"/>
            </securityTitle>
            <transactionDate>
                <value>2007-04-26</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>D</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F2"/>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>9133</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>39.08</value>
                    <footnoteId id="F3"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>327866</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value></value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Accenture SCA has no board of directors or officers.  Accenture Ltd, as the sole general partner of Accenture SCA, is vested by Accenture SCA's Articles of Association with the management of Accenture SCA and controls Accenture SCA's management and operations.  The Reporting Person is the Chief Operating Officer of Accenture Ltd.</footnote>
        <footnote id="F2">Planned disposition of Accenture SCA Class I common shares pursuant to Accenture SCA Plan of Disposition.</footnote>
        <footnote id="F3">Reflects the redemption of SCA Class I common shares at the redemption price determined in accordance with the Accenture SCA Articles of Association.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Brian J. O'Neil, Attorney-in-Fact for Stephen J. Rohleder</signatureName>
        <signatureDate>2007-04-30</signatureDate>
    </ownerSignature>
</ownershipDocument>
