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

    <schemaVersion>X0202</schemaVersion>

    <documentType>3/A</documentType>

    <periodOfReport>2004-10-28</periodOfReport>

    <dateOfOriginalSubmission>2004-10-28</dateOfOriginalSubmission>

    <noSecuritiesOwned>0</noSecuritiesOwned>

    <issuer>
        <issuerCik>0001297401</issuerCik>
        <issuerName>DreamWorks Animation SKG, Inc.</issuerName>
        <issuerTradingSymbol>DWA</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001306915</rptOwnerCik>
            <rptOwnerName>Lee Entertainment LLC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>26TH FLOOR, STAR TOWER</rptOwnerStreet1>
            <rptOwnerStreet2>737 YEOKSAM-DONG, KANGNAM-GU</rptOwnerStreet2>
            <rptOwnerCity>SEOUL</rptOwnerCity>
            <rptOwnerState>M5</rptOwnerState>
            <rptOwnerZipCode>135-984</rptOwnerZipCode>
            <rptOwnerStateDescription>KOREA, REPUBLIC OF</rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Class A Common Stock, par value $0.01 per share</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>1997066.63</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value></value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <derivativeTable>
        <derivativeHolding>
            <securityTitle>
                <value>Class B Common Stock, par value $0.01 per share</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <footnoteId id="F2"/>
            </conversionOrExercisePrice>
            <exerciseDate>
                <footnoteId id="F1"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F1"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Class A Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>49688334</value>
                    <footnoteId id="F4"/>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>By DWA Escrow LLLP</value>
                    <footnoteId id="F3"/>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeHolding>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">Class B Common Stock is immediately convertible into Class A Common Stock and does not expire.</footnote>
        <footnote id="F2">Class B Common Stock is convertible into Class A Common Stock on a one-for-one basis.</footnote>
        <footnote id="F3">The reported securities are owned directly by DWA Escrow LLLP. Lee Entertainment L.L.C. is a limited partner of DWA Escrow LLLP and disclaims beneficial ownership of the shares held by DWA Escrow LLLP except to the extent of its pecuniary interest therein. The inclusion of these shares in this report shall not be deemed an admission of beneficial ownership of all of the reported shares for purposes of Section 16 or for any other purpose.</footnote>
        <footnote id="F4">This amended Form 3 is being filed for the sole purpose of correctly reporting the number of shares of Class B Common Stock owned by DWA Escrow LLLP.  The number of shares owned by DWA Escrow LLLP has been modified on the basis of updated information received from DWA Escrow LLLP subsequent to our initial filing.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>Lee Entertainment L.L.C. by Chong Hyun Lim</signatureName>
        <signatureDate>2004-10-29</signatureDate>
    </ownerSignature>
</ownershipDocument>

