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

    <schemaVersion>X0203</schemaVersion>

    <documentType>3/A</documentType>

    <periodOfReport>2009-01-01</periodOfReport>

    <dateOfOriginalSubmission>2009-01-09</dateOfOriginalSubmission>

    <noSecuritiesOwned>0</noSecuritiesOwned>

    <issuer>
        <issuerCik>0000072971</issuerCik>
        <issuerName>WELLS FARGO &amp; CO/MN</issuerName>
        <issuerTradingSymbol>WFC</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001232064</rptOwnerCik>
            <rptOwnerName>CARROLL DAVID M</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>ONE WACHOVIA CENTER</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>CHARLOTTE</rptOwnerCity>
            <rptOwnerState>NC</rptOwnerState>
            <rptOwnerZipCode>28288-0013</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Senior Exec. Vice President</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock, $1 2/3 par value</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>57813</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value></value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock, $1 2/3 par value</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>155.6265</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>Through Wachovia Savings Plan</value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <derivativeTable>
        <derivativeHolding>
            <securityTitle>
                <value>Employee Stock Purchase Option</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>275.93</value>
            </conversionOrExercisePrice>
            <exerciseDate>
                <value>2000-04-20</value>
            </exerciseDate>
            <expirationDate>
                <value>2009-04-20</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock, $1 2/3 par value</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>362</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value></value>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeHolding>
        <derivativeHolding>
            <securityTitle>
                <value>Employee Stock Purchase Option</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>275.93</value>
            </conversionOrExercisePrice>
            <exerciseDate>
                <value>2000-04-20</value>
            </exerciseDate>
            <expirationDate>
                <value>2009-04-20</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock, $1 2/3 par value</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>4933</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value></value>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeHolding>
        <derivativeHolding>
            <securityTitle>
                <value>Employee Stock Purchase Option</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>175.48</value>
            </conversionOrExercisePrice>
            <exerciseDate>
                <value>2000-12-14</value>
            </exerciseDate>
            <expirationDate>
                <value>2009-12-14</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock, $1 2/3 par value</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>7257</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value></value>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeHolding>
        <derivativeHolding>
            <securityTitle>
                <value>Employee Stock Purchase Option</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>158.53</value>
            </conversionOrExercisePrice>
            <exerciseDate>
                <value>2001-01-03</value>
            </exerciseDate>
            <expirationDate>
                <value>2010-01-03</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock, $1 2/3 par value</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>16933</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value></value>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeHolding>
        <derivativeHolding>
            <securityTitle>
                <value>Employee Stock Purchase Option</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>152.69</value>
            </conversionOrExercisePrice>
            <exerciseDate>
                <value>2002-04-17</value>
            </exerciseDate>
            <expirationDate>
                <value>2011-04-17</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock, $1 2/3 par value</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>9955</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value></value>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeHolding>
        <derivativeHolding>
            <securityTitle>
                <value>Employee Stock Purchase Option</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>152.69</value>
            </conversionOrExercisePrice>
            <exerciseDate>
                <value>2003-04-17</value>
            </exerciseDate>
            <expirationDate>
                <value>2011-04-17</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock, $1 2/3 par value</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>9955</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value></value>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeHolding>
        <derivativeHolding>
            <securityTitle>
                <value>Employee Stock Purchase Option</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>152.69</value>
            </conversionOrExercisePrice>
            <exerciseDate>
                <value>2004-04-17</value>
            </exerciseDate>
            <expirationDate>
                <value>2011-04-17</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock, $1 2/3 par value</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>9955</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value></value>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeHolding>
        <derivativeHolding>
            <securityTitle>
                <value>Employee Stock Purchase Option</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>175.39</value>
            </conversionOrExercisePrice>
            <exerciseDate>
                <value>2002-07-31</value>
            </exerciseDate>
            <expirationDate>
                <value>2011-07-31</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock, $1 2/3 par value</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>35499</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value></value>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeHolding>
        <derivativeHolding>
            <securityTitle>
                <value>Employee Stock Purchase Option</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>190.76</value>
            </conversionOrExercisePrice>
            <exerciseDate>
                <value>2003-04-16</value>
            </exerciseDate>
            <expirationDate>
                <value>2012-04-16</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock, $1 2/3 par value</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>7876</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value></value>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeHolding>
        <derivativeHolding>
            <securityTitle>
                <value>Employee Stock Purchase Option</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>190.76</value>
            </conversionOrExercisePrice>
            <exerciseDate>
                <value>2004-04-16</value>
            </exerciseDate>
            <expirationDate>
                <value>2012-04-16</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock, $1 2/3 par value</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>7875</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value></value>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeHolding>
        <derivativeHolding>
            <securityTitle>
                <value>Employee Stock Purchase Option</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>190.76</value>
            </conversionOrExercisePrice>
            <exerciseDate>
                <value>2005-04-16</value>
            </exerciseDate>
            <expirationDate>
                <value>2012-04-16</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock, $1 2/3 par value</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>7876</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value></value>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeHolding>
        <derivativeHolding>
            <securityTitle>
                <value>Employee Stock Purchase Option</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>188.00</value>
            </conversionOrExercisePrice>
            <exerciseDate>
                <footnoteId id="F1"/>
            </exerciseDate>
            <expirationDate>
                <value>2013-04-22</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock, $1 2/3 par value</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
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                </underlyingSecurityShares>
            </underlyingSecurity>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value></value>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeHolding>
        <derivativeHolding>
            <securityTitle>
                <value>Employee Stock Purchase Option</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>224.26</value>
            </conversionOrExercisePrice>
            <exerciseDate>
                <footnoteId id="F2"/>
            </exerciseDate>
            <expirationDate>
                <value>2014-04-19</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock, $1 2/3 par value</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <footnoteId id="F2"/>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value></value>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeHolding>
        <derivativeHolding>
            <securityTitle>
                <value>Employee Stock Purchase Option</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>253.03</value>
            </conversionOrExercisePrice>
            <exerciseDate>
                <value>2006-04-18</value>
            </exerciseDate>
            <expirationDate>
                <value>2015-04-18</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock, $1 2/3 par value</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>3528</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value></value>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeHolding>
        <derivativeHolding>
            <securityTitle>
                <value>Employee Stock Purchase Option</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>253.03</value>
            </conversionOrExercisePrice>
            <exerciseDate>
                <value>2007-04-18</value>
            </exerciseDate>
            <expirationDate>
                <value>2015-04-18</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock, $1 2/3 par value</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>3528</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value></value>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeHolding>
        <derivativeHolding>
            <securityTitle>
                <value>Employee Stock Purchase Option</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>253.03</value>
            </conversionOrExercisePrice>
            <exerciseDate>
                <value>2008-04-18</value>
            </exerciseDate>
            <expirationDate>
                <value>2015-04-18</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock, $1 2/3 par value</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>3528</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value></value>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeHolding>
        <derivativeHolding>
            <securityTitle>
                <value>Employee Stock Purchase Option</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>253.03</value>
            </conversionOrExercisePrice>
            <exerciseDate>
                <value>2009-01-01</value>
            </exerciseDate>
            <expirationDate>
                <value>2015-04-18</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock, $1 2/3 par value</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>7057</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value></value>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeHolding>
        <derivativeHolding>
            <securityTitle>
                <value>Employee Stock Purchase Option</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>281.52</value>
            </conversionOrExercisePrice>
            <exerciseDate>
                <value>2007-03-31</value>
            </exerciseDate>
            <expirationDate>
                <value>2016-03-31</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock, $1 2/3 par value</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>4288</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value></value>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeHolding>
        <derivativeHolding>
            <securityTitle>
                <value>Employee Stock Purchase Option</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>281.52</value>
            </conversionOrExercisePrice>
            <exerciseDate>
                <value>2008-03-31</value>
            </exerciseDate>
            <expirationDate>
                <value>2016-03-31</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock, $1 2/3 par value</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>4288</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value></value>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeHolding>
        <derivativeHolding>
            <securityTitle>
                <value>Employee Stock Purchase Option</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>281.52</value>
            </conversionOrExercisePrice>
            <exerciseDate>
                <value>2009-01-01</value>
            </exerciseDate>
            <expirationDate>
                <value>2016-03-31</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock, $1 2/3 par value</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>12865</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value></value>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeHolding>
        <derivativeHolding>
            <securityTitle>
                <value>Employee Stock Purchase Option</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>293.12</value>
            </conversionOrExercisePrice>
            <exerciseDate>
                <value>2008-02-20</value>
            </exerciseDate>
            <expirationDate>
                <value>2017-02-20</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock, $1 2/3 par value</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>1404</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value></value>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeHolding>
        <derivativeHolding>
            <securityTitle>
                <value>Employee Stock Purchase Option</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>293.12</value>
            </conversionOrExercisePrice>
            <exerciseDate>
                <value>2009-01-01</value>
            </exerciseDate>
            <expirationDate>
                <value>2017-02-20</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock, $1 2/3 par value</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>5619</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value></value>
                </natureOfOwnership>
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        </derivativeHolding>
        <derivativeHolding>
            <securityTitle>
                <value>Employee Stock Purchase Option</value>
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            </conversionOrExercisePrice>
            <exerciseDate>
                <value>2009-01-01</value>
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            <expirationDate>
                <value>2018-02-19</value>
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            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock, $1 2/3 par value</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>16221</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
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                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value></value>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeHolding>
        <derivativeHolding>
            <securityTitle>
                <value>Employee Stock Purchase Option</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>241.08</value>
            </conversionOrExercisePrice>
            <exerciseDate>
                <value>2009-01-01</value>
            </exerciseDate>
            <expirationDate>
                <value>2018-02-19</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock, $1 2/3 par value</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>18924</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
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                <natureOfOwnership>
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        </derivativeHolding>
        <derivativeHolding>
            <securityTitle>
                <value>Employee Stock Purchase Option</value>
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            <conversionOrExercisePrice>
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            </conversionOrExercisePrice>
            <exerciseDate>
                <value>2009-01-01</value>
            </exerciseDate>
            <expirationDate>
                <value>2018-02-19</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock, $1 2/3 par value</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>16351</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value></value>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeHolding>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">Includes 23,163 shares of unvested restricted stock with respect to which provisions exist to allow for the withholding of shares to satisfy tax withholding obligations.</footnote>
        <footnote id="F2">The vesting dates and the numbers of shares in this grant are as follows:  04/19/2005, 3,824 shares; 04/19/2006, 3,824 shares; 04/19/2007, 3,824 shares; 04/19/2008, 3,824 shares; 01/01/2009, 3,823 shares.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>David M. Carroll, by Robert S. Singley, as Attorney-in-Fact</signatureName>
        <signatureDate>2009-07-08</signatureDate>
    </ownerSignature>
</ownershipDocument>
