<?xml version="1.0" encoding="utf-8"?>
<xbrl
  xml:lang="en-US"
  xmlns="http://www.xbrl.org/2003/instance"
  xmlns:dei="http://xbrl.sec.gov/dei/2020-01-31"
  xmlns:link="http://www.xbrl.org/2003/linkbase"
  xmlns:xlink="http://www.w3.org/1999/xlink">
    <link:schemaRef xlink:href="odc-20211207.xsd" xlink:type="simple"/>
    <context id="i4ae74db8effd402b8e28d60f8f9ef22a_D20211013-20211013">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000074046</identifier>
        </entity>
        <period>
            <startDate>2021-10-13</startDate>
            <endDate>2021-10-13</endDate>
        </period>
    </context>
    <dei:EntityCentralIndexKey
      contextRef="i4ae74db8effd402b8e28d60f8f9ef22a_D20211013-20211013"
      id="id3VybDovL2RvY3MudjEvZG9jOmQwMmIxNTkwNzIzMDRkZTI4MzI2ZDgwNGU3N2JhOWVjL3NlYzpkMDJiMTU5MDcyMzA0ZGUyODMyNmQ4MDRlNzdiYTllY180L2ZyYWc6OTdlNGZiZDk0MGY4NDZiMGI0MzcxZWM1ZTBkODJjNjgvdGFibGU6NTViYmE4ZjhiOGQ3NDhiOGEyNzBlMzg1NmYxZWU2OTkvdGFibGVyYW5nZTo1NWJiYThmOGI4ZDc0OGI4YTI3MGUzODU2ZjFlZTY5OV8yLTEtMS0xLTE3NzQy_7d1187ad-f0d3-4494-ab4d-157790edb663">0000074046</dei:EntityCentralIndexKey>
    <dei:AmendmentFlag
      contextRef="i4ae74db8effd402b8e28d60f8f9ef22a_D20211013-20211013"
      id="id3VybDovL2RvY3MudjEvZG9jOmQwMmIxNTkwNzIzMDRkZTI4MzI2ZDgwNGU3N2JhOWVjL3NlYzpkMDJiMTU5MDcyMzA0ZGUyODMyNmQ4MDRlNzdiYTllY180L2ZyYWc6OTdlNGZiZDk0MGY4NDZiMGI0MzcxZWM1ZTBkODJjNjgvdGFibGU6NTViYmE4ZjhiOGQ3NDhiOGEyNzBlMzg1NmYxZWU2OTkvdGFibGVyYW5nZTo1NWJiYThmOGI4ZDc0OGI4YTI3MGUzODU2ZjFlZTY5OV8zLTEtMS0xLTE3NzQy_a3cb2f0d-2793-458b-9adb-7ab943d0b4c8">false</dei:AmendmentFlag>
    <dei:DocumentType
      contextRef="i4ae74db8effd402b8e28d60f8f9ef22a_D20211013-20211013"
      id="id3VybDovL2RvY3MudjEvZG9jOmQwMmIxNTkwNzIzMDRkZTI4MzI2ZDgwNGU3N2JhOWVjL3NlYzpkMDJiMTU5MDcyMzA0ZGUyODMyNmQ4MDRlNzdiYTllY18xL2ZyYWc6OTk2ZjRjMjFkMjMwNGJhNWI1MThmNWEyNTI1MjFhZWIvdGV4dHJlZ2lvbjo5OTZmNGMyMWQyMzA0YmE1YjUxOGY1YTI1MjUyMWFlYl8xNjY1_dff942cd-ec1c-4c29-98b4-55365fd4d6cd">8-K</dei:DocumentType>
    <dei:DocumentPeriodEndDate
      contextRef="i4ae74db8effd402b8e28d60f8f9ef22a_D20211013-20211013"
      id="id3VybDovL2RvY3MudjEvZG9jOmQwMmIxNTkwNzIzMDRkZTI4MzI2ZDgwNGU3N2JhOWVjL3NlYzpkMDJiMTU5MDcyMzA0ZGUyODMyNmQ4MDRlNzdiYTllY18xL2ZyYWc6OTk2ZjRjMjFkMjMwNGJhNWI1MThmNWEyNTI1MjFhZWIvdGFibGU6MjVjZjNmMjk3MmRiNDJiY2I1MDhlY2VmYTgzYmZjMzkvdGFibGVyYW5nZToyNWNmM2YyOTcyZGI0MmJjYjUwOGVjZWZhODNiZmMzOV8wLTEtMS0xLTE3NzQy_dcc52e45-3a50-4be7-9bc9-b437114710e7">2021-12-07</dei:DocumentPeriodEndDate>
    <dei:EntityRegistrantName
      contextRef="i4ae74db8effd402b8e28d60f8f9ef22a_D20211013-20211013"
      id="id3VybDovL2RvY3MudjEvZG9jOmQwMmIxNTkwNzIzMDRkZTI4MzI2ZDgwNGU3N2JhOWVjL3NlYzpkMDJiMTU5MDcyMzA0ZGUyODMyNmQ4MDRlNzdiYTllY18xL2ZyYWc6OTk2ZjRjMjFkMjMwNGJhNWI1MThmNWEyNTI1MjFhZWIvdGV4dHJlZ2lvbjo5OTZmNGMyMWQyMzA0YmE1YjUxOGY1YTI1MjUyMWFlYl8xNjY2_ce469898-4a95-4bbf-ab2b-76590754909a">OIL-DRI CORPORATION OF AMERICA</dei:EntityRegistrantName>
    <dei:EntityIncorporationStateCountryCode
      contextRef="i4ae74db8effd402b8e28d60f8f9ef22a_D20211013-20211013"
      id="id3VybDovL2RvY3MudjEvZG9jOmQwMmIxNTkwNzIzMDRkZTI4MzI2ZDgwNGU3N2JhOWVjL3NlYzpkMDJiMTU5MDcyMzA0ZGUyODMyNmQ4MDRlNzdiYTllY18xL2ZyYWc6OTk2ZjRjMjFkMjMwNGJhNWI1MThmNWEyNTI1MjFhZWIvdGV4dHJlZ2lvbjo5OTZmNGMyMWQyMzA0YmE1YjUxOGY1YTI1MjUyMWFlYl8xNjYw_de80e1e9-468c-4a73-84bc-5fda684afa96">DE</dei:EntityIncorporationStateCountryCode>
    <dei:EntityFileNumber
      contextRef="i4ae74db8effd402b8e28d60f8f9ef22a_D20211013-20211013"
      id="id3VybDovL2RvY3MudjEvZG9jOmQwMmIxNTkwNzIzMDRkZTI4MzI2ZDgwNGU3N2JhOWVjL3NlYzpkMDJiMTU5MDcyMzA0ZGUyODMyNmQ4MDRlNzdiYTllY18xL2ZyYWc6OTk2ZjRjMjFkMjMwNGJhNWI1MThmNWEyNTI1MjFhZWIvdGV4dHJlZ2lvbjo5OTZmNGMyMWQyMzA0YmE1YjUxOGY1YTI1MjUyMWFlYl8xNjYx_dc231ff2-9644-4c26-b9a7-374f49be13a2">001-12622</dei:EntityFileNumber>
    <dei:EntityTaxIdentificationNumber
      contextRef="i4ae74db8effd402b8e28d60f8f9ef22a_D20211013-20211013"
      id="id3VybDovL2RvY3MudjEvZG9jOmQwMmIxNTkwNzIzMDRkZTI4MzI2ZDgwNGU3N2JhOWVjL3NlYzpkMDJiMTU5MDcyMzA0ZGUyODMyNmQ4MDRlNzdiYTllY18xL2ZyYWc6OTk2ZjRjMjFkMjMwNGJhNWI1MThmNWEyNTI1MjFhZWIvdGV4dHJlZ2lvbjo5OTZmNGMyMWQyMzA0YmE1YjUxOGY1YTI1MjUyMWFlYl8xNjU0_09ffd89a-ead7-4427-b2f0-18c2408329f2">36-2048898</dei:EntityTaxIdentificationNumber>
    <dei:EntityAddressAddressLine1
      contextRef="i4ae74db8effd402b8e28d60f8f9ef22a_D20211013-20211013"
      id="id3VybDovL2RvY3MudjEvZG9jOmQwMmIxNTkwNzIzMDRkZTI4MzI2ZDgwNGU3N2JhOWVjL3NlYzpkMDJiMTU5MDcyMzA0ZGUyODMyNmQ4MDRlNzdiYTllY18xL2ZyYWc6OTk2ZjRjMjFkMjMwNGJhNWI1MThmNWEyNTI1MjFhZWIvdGV4dHJlZ2lvbjo5OTZmNGMyMWQyMzA0YmE1YjUxOGY1YTI1MjUyMWFlYl8xNjU1_a6cd8438-2906-4cb2-926d-e417f595c5a0">410 North Michigan Avenue</dei:EntityAddressAddressLine1>
    <dei:EntityAddressAddressLine2
      contextRef="i4ae74db8effd402b8e28d60f8f9ef22a_D20211013-20211013"
      id="id3VybDovL2RvY3MudjEvZG9jOmQwMmIxNTkwNzIzMDRkZTI4MzI2ZDgwNGU3N2JhOWVjL3NlYzpkMDJiMTU5MDcyMzA0ZGUyODMyNmQ4MDRlNzdiYTllY18xL2ZyYWc6OTk2ZjRjMjFkMjMwNGJhNWI1MThmNWEyNTI1MjFhZWIvdGV4dHJlZ2lvbjo5OTZmNGMyMWQyMzA0YmE1YjUxOGY1YTI1MjUyMWFlYl8xNjYy_d12cf8a6-d12e-41f9-a131-81b525a351d3">Suite 400</dei:EntityAddressAddressLine2>
    <dei:EntityAddressPostalZipCode
      contextRef="i4ae74db8effd402b8e28d60f8f9ef22a_D20211013-20211013"
      id="id3VybDovL2RvY3MudjEvZG9jOmQwMmIxNTkwNzIzMDRkZTI4MzI2ZDgwNGU3N2JhOWVjL3NlYzpkMDJiMTU5MDcyMzA0ZGUyODMyNmQ4MDRlNzdiYTllY18xL2ZyYWc6OTk2ZjRjMjFkMjMwNGJhNWI1MThmNWEyNTI1MjFhZWIvdGV4dHJlZ2lvbjo5OTZmNGMyMWQyMzA0YmE1YjUxOGY1YTI1MjUyMWFlYl8xNjYz_0d6cc307-3cd2-45b5-ae09-8ede58a55ae4">60611-4213</dei:EntityAddressPostalZipCode>
    <dei:EntityAddressCityOrTown
      contextRef="i4ae74db8effd402b8e28d60f8f9ef22a_D20211013-20211013"
      id="id3VybDovL2RvY3MudjEvZG9jOmQwMmIxNTkwNzIzMDRkZTI4MzI2ZDgwNGU3N2JhOWVjL3NlYzpkMDJiMTU5MDcyMzA0ZGUyODMyNmQ4MDRlNzdiYTllY18xL2ZyYWc6OTk2ZjRjMjFkMjMwNGJhNWI1MThmNWEyNTI1MjFhZWIvdGV4dHJlZ2lvbjo5OTZmNGMyMWQyMzA0YmE1YjUxOGY1YTI1MjUyMWFlYl8xNjY0_f725063e-ca81-464a-983b-666359cf1fe2">Chicago</dei:EntityAddressCityOrTown>
    <dei:EntityAddressStateOrProvince
      contextRef="i4ae74db8effd402b8e28d60f8f9ef22a_D20211013-20211013"
      id="id3VybDovL2RvY3MudjEvZG9jOmQwMmIxNTkwNzIzMDRkZTI4MzI2ZDgwNGU3N2JhOWVjL3NlYzpkMDJiMTU5MDcyMzA0ZGUyODMyNmQ4MDRlNzdiYTllY18xL2ZyYWc6OTk2ZjRjMjFkMjMwNGJhNWI1MThmNWEyNTI1MjFhZWIvdGV4dHJlZ2lvbjo5OTZmNGMyMWQyMzA0YmE1YjUxOGY1YTI1MjUyMWFlYl8xNjU2_849ad226-6039-4fc2-a818-4de5cc398533">IL</dei:EntityAddressStateOrProvince>
    <dei:CityAreaCode
      contextRef="i4ae74db8effd402b8e28d60f8f9ef22a_D20211013-20211013"
      id="id3VybDovL2RvY3MudjEvZG9jOmQwMmIxNTkwNzIzMDRkZTI4MzI2ZDgwNGU3N2JhOWVjL3NlYzpkMDJiMTU5MDcyMzA0ZGUyODMyNmQ4MDRlNzdiYTllY18xL2ZyYWc6OTk2ZjRjMjFkMjMwNGJhNWI1MThmNWEyNTI1MjFhZWIvdGV4dHJlZ2lvbjo5OTZmNGMyMWQyMzA0YmE1YjUxOGY1YTI1MjUyMWFlYl8xNjU3_c26c5c37-4fa6-4fcf-b946-dabe55efeb82">312</dei:CityAreaCode>
    <dei:LocalPhoneNumber
      contextRef="i4ae74db8effd402b8e28d60f8f9ef22a_D20211013-20211013"
      id="id3VybDovL2RvY3MudjEvZG9jOmQwMmIxNTkwNzIzMDRkZTI4MzI2ZDgwNGU3N2JhOWVjL3NlYzpkMDJiMTU5MDcyMzA0ZGUyODMyNmQ4MDRlNzdiYTllY18xL2ZyYWc6OTk2ZjRjMjFkMjMwNGJhNWI1MThmNWEyNTI1MjFhZWIvdGV4dHJlZ2lvbjo5OTZmNGMyMWQyMzA0YmE1YjUxOGY1YTI1MjUyMWFlYl8xNjU4_1cbf5e28-8c41-4716-b5c3-5a5fb7e84625">321-1515</dei:LocalPhoneNumber>
    <dei:Security12bTitle
      contextRef="i4ae74db8effd402b8e28d60f8f9ef22a_D20211013-20211013"
      id="id3VybDovL2RvY3MudjEvZG9jOmQwMmIxNTkwNzIzMDRkZTI4MzI2ZDgwNGU3N2JhOWVjL3NlYzpkMDJiMTU5MDcyMzA0ZGUyODMyNmQ4MDRlNzdiYTllY18xL2ZyYWc6OTk2ZjRjMjFkMjMwNGJhNWI1MThmNWEyNTI1MjFhZWIvdGFibGU6MjE4OGU2NDEyNzFkNDkyYWEwM2YxN2U4NDkwMDc3ZjYvdGFibGVyYW5nZToyMTg4ZTY0MTI3MWQ0OTJhYTAzZjE3ZTg0OTAwNzdmNl8xLTAtMS0xLTE3NzQy_054d74b1-3cd8-43b8-bba4-5e3f67c15b0f">Common Stock, par value $0.10 per share</dei:Security12bTitle>
    <dei:TradingSymbol
      contextRef="i4ae74db8effd402b8e28d60f8f9ef22a_D20211013-20211013"
      id="id3VybDovL2RvY3MudjEvZG9jOmQwMmIxNTkwNzIzMDRkZTI4MzI2ZDgwNGU3N2JhOWVjL3NlYzpkMDJiMTU5MDcyMzA0ZGUyODMyNmQ4MDRlNzdiYTllY18xL2ZyYWc6OTk2ZjRjMjFkMjMwNGJhNWI1MThmNWEyNTI1MjFhZWIvdGFibGU6MjE4OGU2NDEyNzFkNDkyYWEwM2YxN2U4NDkwMDc3ZjYvdGFibGVyYW5nZToyMTg4ZTY0MTI3MWQ0OTJhYTAzZjE3ZTg0OTAwNzdmNl8xLTEtMS0xLTE3NzQy_d4817a08-6417-4374-940e-bc7c874df13a">ODC</dei:TradingSymbol>
    <dei:SecurityExchangeName
      contextRef="i4ae74db8effd402b8e28d60f8f9ef22a_D20211013-20211013"
      id="id3VybDovL2RvY3MudjEvZG9jOmQwMmIxNTkwNzIzMDRkZTI4MzI2ZDgwNGU3N2JhOWVjL3NlYzpkMDJiMTU5MDcyMzA0ZGUyODMyNmQ4MDRlNzdiYTllY18xL2ZyYWc6OTk2ZjRjMjFkMjMwNGJhNWI1MThmNWEyNTI1MjFhZWIvdGFibGU6MjE4OGU2NDEyNzFkNDkyYWEwM2YxN2U4NDkwMDc3ZjYvdGFibGVyYW5nZToyMTg4ZTY0MTI3MWQ0OTJhYTAzZjE3ZTg0OTAwNzdmNl8xLTItMS0xLTE3NzQy_44bccf45-c3dc-48be-8173-d80942cde4a2">NYSE</dei:SecurityExchangeName>
    <dei:WrittenCommunications
      contextRef="i4ae74db8effd402b8e28d60f8f9ef22a_D20211013-20211013"
      id="id3VybDovL2RvY3MudjEvZG9jOmQwMmIxNTkwNzIzMDRkZTI4MzI2ZDgwNGU3N2JhOWVjL3NlYzpkMDJiMTU5MDcyMzA0ZGUyODMyNmQ4MDRlNzdiYTllY18xL2ZyYWc6OTk2ZjRjMjFkMjMwNGJhNWI1MThmNWEyNTI1MjFhZWIvdGFibGU6ZmI3MDRmNWU1YTFkNGYwYWE1YmUxNjQzNmI1ZmYwY2MvdGFibGVyYW5nZTpmYjcwNGY1ZTVhMWQ0ZjBhYTViZTE2NDM2YjVmZjBjY18wLTEtMS0xLTE3NzQy_45e0544b-656f-48c5-ab53-d0e6e988c09a">false</dei:WrittenCommunications>
    <dei:SolicitingMaterial
      contextRef="i4ae74db8effd402b8e28d60f8f9ef22a_D20211013-20211013"
      id="id3VybDovL2RvY3MudjEvZG9jOmQwMmIxNTkwNzIzMDRkZTI4MzI2ZDgwNGU3N2JhOWVjL3NlYzpkMDJiMTU5MDcyMzA0ZGUyODMyNmQ4MDRlNzdiYTllY18xL2ZyYWc6OTk2ZjRjMjFkMjMwNGJhNWI1MThmNWEyNTI1MjFhZWIvdGFibGU6ZjliNDcxZTA0ODRiNGUyYjk0ZGViODQ1ZDdmZDU1YzQvdGFibGVyYW5nZTpmOWI0NzFlMDQ4NGI0ZTJiOTRkZWI4NDVkN2ZkNTVjNF8wLTEtMS0xLTE3NzQy_df5d86e4-1b94-460b-aa91-74bd5be4efa8">false</dei:SolicitingMaterial>
    <dei:PreCommencementTenderOffer
      contextRef="i4ae74db8effd402b8e28d60f8f9ef22a_D20211013-20211013"
      id="id3VybDovL2RvY3MudjEvZG9jOmQwMmIxNTkwNzIzMDRkZTI4MzI2ZDgwNGU3N2JhOWVjL3NlYzpkMDJiMTU5MDcyMzA0ZGUyODMyNmQ4MDRlNzdiYTllY18xL2ZyYWc6OTk2ZjRjMjFkMjMwNGJhNWI1MThmNWEyNTI1MjFhZWIvdGFibGU6NWQ5OTk3NjJiNzExNDg1ZGI1N2QxMWQ0OTI4OTA5NzAvdGFibGVyYW5nZTo1ZDk5OTc2MmI3MTE0ODVkYjU3ZDExZDQ5Mjg5MDk3MF8wLTEtMS0xLTE3NzQy_44ce44a0-7d18-46db-9b1c-c948221f7911">false</dei:PreCommencementTenderOffer>
    <dei:PreCommencementIssuerTenderOffer
      contextRef="i4ae74db8effd402b8e28d60f8f9ef22a_D20211013-20211013"
      id="id3VybDovL2RvY3MudjEvZG9jOmQwMmIxNTkwNzIzMDRkZTI4MzI2ZDgwNGU3N2JhOWVjL3NlYzpkMDJiMTU5MDcyMzA0ZGUyODMyNmQ4MDRlNzdiYTllY18xL2ZyYWc6OTk2ZjRjMjFkMjMwNGJhNWI1MThmNWEyNTI1MjFhZWIvdGFibGU6ZDQ3YThkOGUxN2EyNGRlODk4N2IzMzM4YzczZDUwM2EvdGFibGVyYW5nZTpkNDdhOGQ4ZTE3YTI0ZGU4OTg3YjMzMzhjNzNkNTAzYV8wLTEtMS0xLTE3NzQy_6c5a4048-8a60-4ed0-8c94-9b4d01ee7163">false</dei:PreCommencementIssuerTenderOffer>
    <dei:EntityEmergingGrowthCompany
      contextRef="i4ae74db8effd402b8e28d60f8f9ef22a_D20211013-20211013"
      id="id3VybDovL2RvY3MudjEvZG9jOmQwMmIxNTkwNzIzMDRkZTI4MzI2ZDgwNGU3N2JhOWVjL3NlYzpkMDJiMTU5MDcyMzA0ZGUyODMyNmQ4MDRlNzdiYTllY18xL2ZyYWc6OTk2ZjRjMjFkMjMwNGJhNWI1MThmNWEyNTI1MjFhZWIvdGV4dHJlZ2lvbjo5OTZmNGMyMWQyMzA0YmE1YjUxOGY1YTI1MjUyMWFlYl8xNjU5_b4462202-d866-406b-9731-825c3b02ae85">false</dei:EntityEmergingGrowthCompany>
</xbrl>
