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

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2018-11-07</periodOfReport>

    <issuer>
        <issuerCik>0000730464</issuerCik>
        <issuerName>Adtalem Global Education Inc.</issuerName>
        <issuerTradingSymbol>ATGE</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001580230</rptOwnerCik>
            <rptOwnerName>Nash Christopher C</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>500 WEST MONROE</rptOwnerStreet1>
            <rptOwnerStreet2>28TH FLOOR</rptOwnerStreet2>
            <rptOwnerCity>CHICAGO</rptOwnerCity>
            <rptOwnerState>IL</rptOwnerState>
            <rptOwnerZipCode>60661</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isOfficer>1</isOfficer>
            <officerTitle>SVP, Chief Information Officer</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

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            <transactionTimeliness></transactionTimeliness>
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                <directOrIndirectOwnership>
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        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
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            <transactionDate>
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    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
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            <transactionDate>
                <value>2018-11-07</value>
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                <transactionPricePerShare>
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                <transactionAcquiredDisposedCode>
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            <exerciseDate>
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            </exerciseDate>
            <expirationDate>
                <value>2022-08-29</value>
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            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>5950</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
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            <securityTitle>
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            <exerciseDate>
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        </derivativeTransaction>
    </derivativeTable>

    <footnotes></footnotes>

    <ownerSignature>
        <signatureName>/s/ Stephen W. Beard for Christopher C. Nash</signatureName>
        <signatureDate>2018-11-09</signatureDate>
    </ownerSignature>
</ownershipDocument>
