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<?xml version="1.0" encoding="windows-1252"?> |
<ownershipDocument> |
| <schemaVersion> X0306 </schemaVersion> |
| <documentType> 4 </documentType> |
| <periodOfReport> 2020-06-30 </periodOfReport> |
| <issuer> |
| | <issuerCik> 0000004962 </issuerCik> |
| | <issuerName> AMERICAN EXPRESS CO </issuerName> |
| | <issuerTradingSymbol> AXP </issuerTradingSymbol> |
| | </issuer> |
| <reportingOwner> |
| | <reportingOwnerId> |
| | | <rptOwnerCik> 0001185243 </rptOwnerCik> |
| | | <rptOwnerName> WILLIAMS RONALD A </rptOwnerName> |
| | | </reportingOwnerId> |
| | <reportingOwnerAddress> |
| | | <rptOwnerStreet1> C/O AMERICAN EXPRESS COMPANY </rptOwnerStreet1> |
| | | <rptOwnerStreet2> 200 VESEY STREET </rptOwnerStreet2> |
| | | <rptOwnerCity> NEW YORK </rptOwnerCity> |
| | | <rptOwnerState> NY </rptOwnerState> |
| | | <rptOwnerZipCode> 10285-5001 </rptOwnerZipCode> |
| | | <rptOwnerStateDescription></rptOwnerStateDescription> |
| | | </reportingOwnerAddress> |
| | <reportingOwnerRelationship> |
| | | <isDirector> 1 </isDirector> |
| | | </reportingOwnerRelationship> |
| | </reportingOwner> |
| <derivativeTable> |
| | <derivativeTransaction> |
| | | <securityTitle> |
| <value> Share Equivalent Units </value> |
| </securityTitle> |
| | | <conversionOrExercisePrice> |
| <footnoteId id="F1"/> |
| </conversionOrExercisePrice> |
| | | <transactionDate> |
| <value> 2020-06-30 </value> |
| </transactionDate> |
| | | <transactionCoding> |
| <transactionFormType> 4 </transactionFormType> |
| <transactionCode> A </transactionCode> |
| <equitySwapInvolved> 0 </equitySwapInvolved> |
| <footnoteId id="F2"/> |
| </transactionCoding> |
| | | <transactionTimeliness></transactionTimeliness> |
| | | <transactionAmounts> |
| <transactionShares> |
| <value> 190.859 </value> |
| </transactionShares> |
| <transactionPricePerShare> |
| <value> 98.24 </value> |
| </transactionPricePerShare> |
| <transactionAcquiredDisposedCode> |
| <value> A </value> |
| </transactionAcquiredDisposedCode> |
| </transactionAmounts> |
| | | <exerciseDate> |
| <footnoteId id="F3"/> |
| </exerciseDate> |
| | | <expirationDate> |
| <footnoteId id="F3"/> |
| </expirationDate> |
| | | <underlyingSecurity> |
| <underlyingSecurityTitle> |
| <value> Common Stock </value> |
| </underlyingSecurityTitle> |
| <underlyingSecurityShares> |
| <value> 190.859 </value> |
| </underlyingSecurityShares> |
| </underlyingSecurity> |
| | | <postTransactionAmounts> |
| <sharesOwnedFollowingTransaction> |
| <value> 73147.0739 </value> |
| <footnoteId id="F4"/> |
| </sharesOwnedFollowingTransaction> |
| </postTransactionAmounts> |
| | | <ownershipNature> |
| <directOrIndirectOwnership> |
| <value> D </value> |
| </directOrIndirectOwnership> |
| </ownershipNature> |
| | | </derivativeTransaction> |
| | </derivativeTable> |
| <footnotes> |
| | <footnote id="F1"> Each Share Equivalent Unit reflects the value of one common share. </footnote> |
| | <footnote id="F2"> The reported Share Equivalent Units were acquired pursuant to the Company's 2003 Share Equivalent Unit Plan for Directors and will be settled in cash following termination of service as a Director. </footnote> |
| | <footnote id="F3"> The Share Equivalent Units are convertible immediately and have no expiration date. </footnote> |
| | <footnote id="F4"> Includes Share Equivalent Units acquired pursuant to a dividend reinvestment feature of the Directors' Deferred Compensation Plan and/or the 2003 Share Equivalent Unit Plan for Directors. </footnote> |
| | </footnotes> |
| <ownerSignature> |
| | <signatureName> /s/ Kristina V. Fink, attorney-in-fact </signatureName> |
| | <signatureDate> 2020-07-02 </signatureDate> |
| | </ownerSignature> |
| </ownershipDocument> |