<?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/2019-01-31"
  xmlns:link="http://www.xbrl.org/2003/linkbase"
  xmlns:xlink="http://www.w3.org/1999/xlink">
    <link:schemaRef xlink:href="wynn-20210510.xsd" xlink:type="simple"/>
    <context id="ie0f000d8b68443b4a4f8401516baa7b1_D20210510-20210510">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001174922</identifier>
        </entity>
        <period>
            <startDate>2021-05-10</startDate>
            <endDate>2021-05-10</endDate>
        </period>
    </context>
    <dei:EntityCentralIndexKey
      contextRef="ie0f000d8b68443b4a4f8401516baa7b1_D20210510-20210510"
      id="id3VybDovL2RvY3MudjEvZG9jOmUzOTVmYTZhODBiMTQ4NGI5NTI1NGFlOTAwZDVhOWY5L3NlYzplMzk1ZmE2YTgwYjE0ODRiOTUyNTRhZTkwMGQ1YTlmOV80L2ZyYWc6NzQ2OTgxZTgxMGE4NGQyNzgxOGZjYzBkNWFjZTVlY2UvdGFibGU6ZGVlMDAyYWQyOGI0NGUwYzlhZWY2MDdiNjdjZDc4NTEvdGFibGVyYW5nZTpkZWUwMDJhZDI4YjQ0ZTBjOWFlZjYwN2I2N2NkNzg1MV8wLTEtMS0xLTA_8fa0d9db-8845-4103-bbdd-3b924e6fe180">0001174922</dei:EntityCentralIndexKey>
    <dei:AmendmentFlag
      contextRef="ie0f000d8b68443b4a4f8401516baa7b1_D20210510-20210510"
      id="id3VybDovL2RvY3MudjEvZG9jOmUzOTVmYTZhODBiMTQ4NGI5NTI1NGFlOTAwZDVhOWY5L3NlYzplMzk1ZmE2YTgwYjE0ODRiOTUyNTRhZTkwMGQ1YTlmOV80L2ZyYWc6NzQ2OTgxZTgxMGE4NGQyNzgxOGZjYzBkNWFjZTVlY2UvdGFibGU6ZGVlMDAyYWQyOGI0NGUwYzlhZWY2MDdiNjdjZDc4NTEvdGFibGVyYW5nZTpkZWUwMDJhZDI4YjQ0ZTBjOWFlZjYwN2I2N2NkNzg1MV8xLTEtMS0xLTA_3264b910-8585-43c9-a84d-cab78f1285a2">false</dei:AmendmentFlag>
    <dei:DocumentType
      contextRef="ie0f000d8b68443b4a4f8401516baa7b1_D20210510-20210510"
      id="id3VybDovL2RvY3MudjEvZG9jOmUzOTVmYTZhODBiMTQ4NGI5NTI1NGFlOTAwZDVhOWY5L3NlYzplMzk1ZmE2YTgwYjE0ODRiOTUyNTRhZTkwMGQ1YTlmOV8xL2ZyYWc6NDZkZjUxNmQ0ZGI4NDU2Y2FlOWJhNjg1ZGQ5MWI5MDkvdGV4dHJlZ2lvbjo0NmRmNTE2ZDRkYjg0NTZjYWU5YmE2ODVkZDkxYjkwOV8xNjM2_8a20a81f-aef1-4d4e-a183-ddc3388bacb5">8-K</dei:DocumentType>
    <dei:DocumentPeriodEndDate
      contextRef="ie0f000d8b68443b4a4f8401516baa7b1_D20210510-20210510"
      id="id3VybDovL2RvY3MudjEvZG9jOmUzOTVmYTZhODBiMTQ4NGI5NTI1NGFlOTAwZDVhOWY5L3NlYzplMzk1ZmE2YTgwYjE0ODRiOTUyNTRhZTkwMGQ1YTlmOV8xL2ZyYWc6NDZkZjUxNmQ0ZGI4NDU2Y2FlOWJhNjg1ZGQ5MWI5MDkvdGV4dHJlZ2lvbjo0NmRmNTE2ZDRkYjg0NTZjYWU5YmE2ODVkZDkxYjkwOV8xNjQx_d1b0337b-65f8-4a0b-9fa9-ce19da803e3a">2021-05-10</dei:DocumentPeriodEndDate>
    <dei:EntityRegistrantName
      contextRef="ie0f000d8b68443b4a4f8401516baa7b1_D20210510-20210510"
      id="id3VybDovL2RvY3MudjEvZG9jOmUzOTVmYTZhODBiMTQ4NGI5NTI1NGFlOTAwZDVhOWY5L3NlYzplMzk1ZmE2YTgwYjE0ODRiOTUyNTRhZTkwMGQ1YTlmOV8xL2ZyYWc6NDZkZjUxNmQ0ZGI4NDU2Y2FlOWJhNjg1ZGQ5MWI5MDkvdGV4dHJlZ2lvbjo0NmRmNTE2ZDRkYjg0NTZjYWU5YmE2ODVkZDkxYjkwOV8xNjQy_61eb2b61-c578-4afd-a59c-c62a6e68b926">WYNN RESORTS, LIMITED</dei:EntityRegistrantName>
    <dei:EntityIncorporationStateCountryCode
      contextRef="ie0f000d8b68443b4a4f8401516baa7b1_D20210510-20210510"
      id="id3VybDovL2RvY3MudjEvZG9jOmUzOTVmYTZhODBiMTQ4NGI5NTI1NGFlOTAwZDVhOWY5L3NlYzplMzk1ZmE2YTgwYjE0ODRiOTUyNTRhZTkwMGQ1YTlmOV8xL2ZyYWc6NDZkZjUxNmQ0ZGI4NDU2Y2FlOWJhNjg1ZGQ5MWI5MDkvdGFibGU6NDhiY2RjMTE5Y2U4NDkyYzk4MGE3OTU1NmJkMmQ1ZGEvdGFibGVyYW5nZTo0OGJjZGMxMTljZTg0OTJjOTgwYTc5NTU2YmQyZDVkYV8wLTAtMS0xLTA_27ac05d0-6347-4541-a9f1-066aab1917d7">NV</dei:EntityIncorporationStateCountryCode>
    <dei:EntityFileNumber
      contextRef="ie0f000d8b68443b4a4f8401516baa7b1_D20210510-20210510"
      id="id3VybDovL2RvY3MudjEvZG9jOmUzOTVmYTZhODBiMTQ4NGI5NTI1NGFlOTAwZDVhOWY5L3NlYzplMzk1ZmE2YTgwYjE0ODRiOTUyNTRhZTkwMGQ1YTlmOV8xL2ZyYWc6NDZkZjUxNmQ0ZGI4NDU2Y2FlOWJhNjg1ZGQ5MWI5MDkvdGFibGU6NDhiY2RjMTE5Y2U4NDkyYzk4MGE3OTU1NmJkMmQ1ZGEvdGFibGVyYW5nZTo0OGJjZGMxMTljZTg0OTJjOTgwYTc5NTU2YmQyZDVkYV8wLTItMS0xLTA_f2ebdaad-8b91-4caf-920b-0b47f1cf9be5">000-50028</dei:EntityFileNumber>
    <dei:EntityTaxIdentificationNumber
      contextRef="ie0f000d8b68443b4a4f8401516baa7b1_D20210510-20210510"
      id="id3VybDovL2RvY3MudjEvZG9jOmUzOTVmYTZhODBiMTQ4NGI5NTI1NGFlOTAwZDVhOWY5L3NlYzplMzk1ZmE2YTgwYjE0ODRiOTUyNTRhZTkwMGQ1YTlmOV8xL2ZyYWc6NDZkZjUxNmQ0ZGI4NDU2Y2FlOWJhNjg1ZGQ5MWI5MDkvdGFibGU6NDhiY2RjMTE5Y2U4NDkyYzk4MGE3OTU1NmJkMmQ1ZGEvdGFibGVyYW5nZTo0OGJjZGMxMTljZTg0OTJjOTgwYTc5NTU2YmQyZDVkYV8wLTMtMS0xLTA_2ae58c44-3f06-477d-8194-df45e328f4f6">46-0484987</dei:EntityTaxIdentificationNumber>
    <dei:EntityAddressAddressLine1
      contextRef="ie0f000d8b68443b4a4f8401516baa7b1_D20210510-20210510"
      id="id3VybDovL2RvY3MudjEvZG9jOmUzOTVmYTZhODBiMTQ4NGI5NTI1NGFlOTAwZDVhOWY5L3NlYzplMzk1ZmE2YTgwYjE0ODRiOTUyNTRhZTkwMGQ1YTlmOV8xL2ZyYWc6NDZkZjUxNmQ0ZGI4NDU2Y2FlOWJhNjg1ZGQ5MWI5MDkvdGFibGU6NDhiY2RjMTE5Y2U4NDkyYzk4MGE3OTU1NmJkMmQ1ZGEvdGFibGVyYW5nZTo0OGJjZGMxMTljZTg0OTJjOTgwYTc5NTU2YmQyZDVkYV8yLTAtMS0xLTA_8819cf9d-6a31-4f37-9661-d725b3d00e69">3131 Las Vegas Boulevard South</dei:EntityAddressAddressLine1>
    <dei:EntityAddressCityOrTown
      contextRef="ie0f000d8b68443b4a4f8401516baa7b1_D20210510-20210510"
      id="id3VybDovL2RvY3MudjEvZG9jOmUzOTVmYTZhODBiMTQ4NGI5NTI1NGFlOTAwZDVhOWY5L3NlYzplMzk1ZmE2YTgwYjE0ODRiOTUyNTRhZTkwMGQ1YTlmOV8xL2ZyYWc6NDZkZjUxNmQ0ZGI4NDU2Y2FlOWJhNjg1ZGQ5MWI5MDkvdGFibGU6NDhiY2RjMTE5Y2U4NDkyYzk4MGE3OTU1NmJkMmQ1ZGEvdGFibGVyYW5nZTo0OGJjZGMxMTljZTg0OTJjOTgwYTc5NTU2YmQyZDVkYV8zLTAtMS0xLTA_df915b2d-7f33-438a-a4e8-c55196ed5a05">Las Vegas,</dei:EntityAddressCityOrTown>
    <dei:EntityAddressStateOrProvince
      contextRef="ie0f000d8b68443b4a4f8401516baa7b1_D20210510-20210510"
      id="id3VybDovL2RvY3MudjEvZG9jOmUzOTVmYTZhODBiMTQ4NGI5NTI1NGFlOTAwZDVhOWY5L3NlYzplMzk1ZmE2YTgwYjE0ODRiOTUyNTRhZTkwMGQ1YTlmOV8xL2ZyYWc6NDZkZjUxNmQ0ZGI4NDU2Y2FlOWJhNjg1ZGQ5MWI5MDkvdGFibGU6NDhiY2RjMTE5Y2U4NDkyYzk4MGE3OTU1NmJkMmQ1ZGEvdGFibGVyYW5nZTo0OGJjZGMxMTljZTg0OTJjOTgwYTc5NTU2YmQyZDVkYV8zLTEtMS0xLTA_3c358170-39f8-419e-b813-6e84fa890cdb">NV</dei:EntityAddressStateOrProvince>
    <dei:EntityAddressPostalZipCode
      contextRef="ie0f000d8b68443b4a4f8401516baa7b1_D20210510-20210510"
      id="id3VybDovL2RvY3MudjEvZG9jOmUzOTVmYTZhODBiMTQ4NGI5NTI1NGFlOTAwZDVhOWY5L3NlYzplMzk1ZmE2YTgwYjE0ODRiOTUyNTRhZTkwMGQ1YTlmOV8xL2ZyYWc6NDZkZjUxNmQ0ZGI4NDU2Y2FlOWJhNjg1ZGQ5MWI5MDkvdGFibGU6NDhiY2RjMTE5Y2U4NDkyYzk4MGE3OTU1NmJkMmQ1ZGEvdGFibGVyYW5nZTo0OGJjZGMxMTljZTg0OTJjOTgwYTc5NTU2YmQyZDVkYV8zLTMtMS0xLTA_e5df70f5-b4ad-4307-8138-0d5d72cfc17f">89109</dei:EntityAddressPostalZipCode>
    <dei:CityAreaCode
      contextRef="ie0f000d8b68443b4a4f8401516baa7b1_D20210510-20210510"
      id="id3VybDovL2RvY3MudjEvZG9jOmUzOTVmYTZhODBiMTQ4NGI5NTI1NGFlOTAwZDVhOWY5L3NlYzplMzk1ZmE2YTgwYjE0ODRiOTUyNTRhZTkwMGQ1YTlmOV8xL2ZyYWc6NDZkZjUxNmQ0ZGI4NDU2Y2FlOWJhNjg1ZGQ5MWI5MDkvdGV4dHJlZ2lvbjo0NmRmNTE2ZDRkYjg0NTZjYWU5YmE2ODVkZDkxYjkwOV8xNjM3_4a039ffe-7cb6-4d80-956b-4d45e77ce89b">702</dei:CityAreaCode>
    <dei:LocalPhoneNumber
      contextRef="ie0f000d8b68443b4a4f8401516baa7b1_D20210510-20210510"
      id="id3VybDovL2RvY3MudjEvZG9jOmUzOTVmYTZhODBiMTQ4NGI5NTI1NGFlOTAwZDVhOWY5L3NlYzplMzk1ZmE2YTgwYjE0ODRiOTUyNTRhZTkwMGQ1YTlmOV8xL2ZyYWc6NDZkZjUxNmQ0ZGI4NDU2Y2FlOWJhNjg1ZGQ5MWI5MDkvdGV4dHJlZ2lvbjo0NmRmNTE2ZDRkYjg0NTZjYWU5YmE2ODVkZDkxYjkwOV8xNjM4_fb5180c1-484d-4deb-9389-a1e463116714">770-7555</dei:LocalPhoneNumber>
    <dei:Security12bTitle
      contextRef="ie0f000d8b68443b4a4f8401516baa7b1_D20210510-20210510"
      id="id3VybDovL2RvY3MudjEvZG9jOmUzOTVmYTZhODBiMTQ4NGI5NTI1NGFlOTAwZDVhOWY5L3NlYzplMzk1ZmE2YTgwYjE0ODRiOTUyNTRhZTkwMGQ1YTlmOV8xL2ZyYWc6NDZkZjUxNmQ0ZGI4NDU2Y2FlOWJhNjg1ZGQ5MWI5MDkvdGFibGU6NDA3OWFiNWU3Y2QxNDM2OTgwODlkNDUxZWQ1NjZmYzQvdGFibGVyYW5nZTo0MDc5YWI1ZTdjZDE0MzY5ODA4OWQ0NTFlZDU2NmZjNF8xLTAtMS0xLTA_484af76e-6915-401d-a7e3-eefbe63459ed">Common stock, par value $0.01</dei:Security12bTitle>
    <dei:TradingSymbol
      contextRef="ie0f000d8b68443b4a4f8401516baa7b1_D20210510-20210510"
      id="id3VybDovL2RvY3MudjEvZG9jOmUzOTVmYTZhODBiMTQ4NGI5NTI1NGFlOTAwZDVhOWY5L3NlYzplMzk1ZmE2YTgwYjE0ODRiOTUyNTRhZTkwMGQ1YTlmOV8xL2ZyYWc6NDZkZjUxNmQ0ZGI4NDU2Y2FlOWJhNjg1ZGQ5MWI5MDkvdGFibGU6NDA3OWFiNWU3Y2QxNDM2OTgwODlkNDUxZWQ1NjZmYzQvdGFibGVyYW5nZTo0MDc5YWI1ZTdjZDE0MzY5ODA4OWQ0NTFlZDU2NmZjNF8xLTItMS0xLTA_2046f65a-724a-4107-bb9b-4b3e3dce8791">WYNN</dei:TradingSymbol>
    <dei:SecurityExchangeName
      contextRef="ie0f000d8b68443b4a4f8401516baa7b1_D20210510-20210510"
      id="id3VybDovL2RvY3MudjEvZG9jOmUzOTVmYTZhODBiMTQ4NGI5NTI1NGFlOTAwZDVhOWY5L3NlYzplMzk1ZmE2YTgwYjE0ODRiOTUyNTRhZTkwMGQ1YTlmOV8xL2ZyYWc6NDZkZjUxNmQ0ZGI4NDU2Y2FlOWJhNjg1ZGQ5MWI5MDkvdGFibGU6NDA3OWFiNWU3Y2QxNDM2OTgwODlkNDUxZWQ1NjZmYzQvdGFibGVyYW5nZTo0MDc5YWI1ZTdjZDE0MzY5ODA4OWQ0NTFlZDU2NmZjNF8xLTQtMS0xLTA_b8bd524d-44bf-4b03-8444-751fed4c537c">NASDAQ</dei:SecurityExchangeName>
    <dei:WrittenCommunications
      contextRef="ie0f000d8b68443b4a4f8401516baa7b1_D20210510-20210510"
      id="id3VybDovL2RvY3MudjEvZG9jOmUzOTVmYTZhODBiMTQ4NGI5NTI1NGFlOTAwZDVhOWY5L3NlYzplMzk1ZmE2YTgwYjE0ODRiOTUyNTRhZTkwMGQ1YTlmOV8xL2ZyYWc6NDZkZjUxNmQ0ZGI4NDU2Y2FlOWJhNjg1ZGQ5MWI5MDkvdGV4dHJlZ2lvbjo0NmRmNTE2ZDRkYjg0NTZjYWU5YmE2ODVkZDkxYjkwOV8xNjM5_e63c3dd3-ddd6-4b0c-b548-86e7c386665a">false</dei:WrittenCommunications>
    <dei:SolicitingMaterial
      contextRef="ie0f000d8b68443b4a4f8401516baa7b1_D20210510-20210510"
      id="id3VybDovL2RvY3MudjEvZG9jOmUzOTVmYTZhODBiMTQ4NGI5NTI1NGFlOTAwZDVhOWY5L3NlYzplMzk1ZmE2YTgwYjE0ODRiOTUyNTRhZTkwMGQ1YTlmOV8xL2ZyYWc6NDZkZjUxNmQ0ZGI4NDU2Y2FlOWJhNjg1ZGQ5MWI5MDkvdGV4dHJlZ2lvbjo0NmRmNTE2ZDRkYjg0NTZjYWU5YmE2ODVkZDkxYjkwOV8xNjQz_2e1b3d7f-3b56-40bd-91f2-80a7e55a4f99">false</dei:SolicitingMaterial>
    <dei:PreCommencementTenderOffer
      contextRef="ie0f000d8b68443b4a4f8401516baa7b1_D20210510-20210510"
      id="id3VybDovL2RvY3MudjEvZG9jOmUzOTVmYTZhODBiMTQ4NGI5NTI1NGFlOTAwZDVhOWY5L3NlYzplMzk1ZmE2YTgwYjE0ODRiOTUyNTRhZTkwMGQ1YTlmOV8xL2ZyYWc6NDZkZjUxNmQ0ZGI4NDU2Y2FlOWJhNjg1ZGQ5MWI5MDkvdGV4dHJlZ2lvbjo0NmRmNTE2ZDRkYjg0NTZjYWU5YmE2ODVkZDkxYjkwOV8xNjQ0_435671b3-82ec-4d31-8347-7d3d7b6f7f31">false</dei:PreCommencementTenderOffer>
    <dei:PreCommencementIssuerTenderOffer
      contextRef="ie0f000d8b68443b4a4f8401516baa7b1_D20210510-20210510"
      id="id3VybDovL2RvY3MudjEvZG9jOmUzOTVmYTZhODBiMTQ4NGI5NTI1NGFlOTAwZDVhOWY5L3NlYzplMzk1ZmE2YTgwYjE0ODRiOTUyNTRhZTkwMGQ1YTlmOV8xL2ZyYWc6NDZkZjUxNmQ0ZGI4NDU2Y2FlOWJhNjg1ZGQ5MWI5MDkvdGV4dHJlZ2lvbjo0NmRmNTE2ZDRkYjg0NTZjYWU5YmE2ODVkZDkxYjkwOV8xNjQ1_9f04df77-b01f-4b07-b496-9f8d1cb2670f">false</dei:PreCommencementIssuerTenderOffer>
    <dei:EntityEmergingGrowthCompany
      contextRef="ie0f000d8b68443b4a4f8401516baa7b1_D20210510-20210510"
      id="id3VybDovL2RvY3MudjEvZG9jOmUzOTVmYTZhODBiMTQ4NGI5NTI1NGFlOTAwZDVhOWY5L3NlYzplMzk1ZmE2YTgwYjE0ODRiOTUyNTRhZTkwMGQ1YTlmOV8xL2ZyYWc6NDZkZjUxNmQ0ZGI4NDU2Y2FlOWJhNjg1ZGQ5MWI5MDkvdGV4dHJlZ2lvbjo0NmRmNTE2ZDRkYjg0NTZjYWU5YmE2ODVkZDkxYjkwOV8xNjQw_d80d19a8-2fd6-4e00-b8e5-b5bcd62eede8">false</dei:EntityEmergingGrowthCompany>
</xbrl>
