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

    <schemaVersion>X0203</schemaVersion>

    <documentType>3/A</documentType>

    <periodOfReport>2009-11-19</periodOfReport>

    <dateOfOriginalSubmission>2009-11-25</dateOfOriginalSubmission>

    <noSecuritiesOwned>0</noSecuritiesOwned>

    <issuer>
        <issuerCik>0001465112</issuerCik>
        <issuerName>DIRECTV</issuerName>
        <issuerTradingSymbol>DTV</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001018211</rptOwnerCik>
            <rptOwnerName>GOULD PAUL A</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O DIRECTV</rptOwnerStreet1>
            <rptOwnerStreet2>2230 EAST IMPERIAL HIGHWAY</rptOwnerStreet2>
            <rptOwnerCity>EL SEGUNDO</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>90245</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Class A Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>416833</value>
                    <footnoteId id="F1"/>
                    <footnoteId id="F2"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value></value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">This is an amendment to correct the Reporting Person's beneficial ownership of the Issuer's Class A Common Stock.</footnote>
        <footnote id="F2">Pursuant to the Agreement and Plan of Merger, dated as of May 3, 2009 as amended, by and among The DIRECTV Group, Inc. (&quot;DIRECTV Group&quot;), Liberty Media Corporation, Liberty Entertainment, Inc. (&quot;LEI&quot;), DIRECTV, DTVG One, Inc. and DTVG Two, Inc., the holders of outstanding shares of LEI Class A common stock received a number of shares of DIRECTV Class A common stock equal to the LEI exchange ratio (1.11130) times the number of LEI Class A common stock held immediately prior to the LEI merger.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>Janet L. Williamson, Attorney-in-Fact</signatureName>
        <signatureDate>2010-01-13</signatureDate>
    </ownerSignature>
</ownershipDocument>
