<?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-20201014.xsd" xlink:type="simple"/>
    <context id="i3c8d5113446740d9820db6bb12915061_D20201014-20201014">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001174922</identifier>
        </entity>
        <period>
            <startDate>2020-10-14</startDate>
            <endDate>2020-10-14</endDate>
        </period>
    </context>
    <dei:EntityCentralIndexKey
      contextRef="i3c8d5113446740d9820db6bb12915061_D20201014-20201014"
      id="id3VybDovL2RvY3MudjEvZG9jOjRkMzBiYzUzNDk0NzRiYjRiNjk3OGZlZjgzY2MyZjExL3NlYzo0ZDMwYmM1MzQ5NDc0YmI0YjY5NzhmZWY4M2NjMmYxMV80L2ZyYWc6MDA5MmZiZTEyYzkwNGM5MWIwNWE0NjBkMmRlMjkyYzIvdGFibGU6MjE5NDBkOWI4NTdmNGM1YzgzYjViZTVlNjgxY2IwYjQvdGFibGVyYW5nZToyMTk0MGQ5Yjg1N2Y0YzVjODNiNWJlNWU2ODFjYjBiNF8wLTEtMS0xLTA_624324bd-d2f6-468d-ac93-5cd8150eb558">0001174922</dei:EntityCentralIndexKey>
    <dei:AmendmentFlag
      contextRef="i3c8d5113446740d9820db6bb12915061_D20201014-20201014"
      id="id3VybDovL2RvY3MudjEvZG9jOjRkMzBiYzUzNDk0NzRiYjRiNjk3OGZlZjgzY2MyZjExL3NlYzo0ZDMwYmM1MzQ5NDc0YmI0YjY5NzhmZWY4M2NjMmYxMV80L2ZyYWc6MDA5MmZiZTEyYzkwNGM5MWIwNWE0NjBkMmRlMjkyYzIvdGFibGU6MjE5NDBkOWI4NTdmNGM1YzgzYjViZTVlNjgxY2IwYjQvdGFibGVyYW5nZToyMTk0MGQ5Yjg1N2Y0YzVjODNiNWJlNWU2ODFjYjBiNF8xLTEtMS0xLTA_56834ad7-da40-472a-bd75-fd4c8695ccaa">false</dei:AmendmentFlag>
    <dei:DocumentType
      contextRef="i3c8d5113446740d9820db6bb12915061_D20201014-20201014"
      id="id3VybDovL2RvY3MudjEvZG9jOjRkMzBiYzUzNDk0NzRiYjRiNjk3OGZlZjgzY2MyZjExL3NlYzo0ZDMwYmM1MzQ5NDc0YmI0YjY5NzhmZWY4M2NjMmYxMV8xL2ZyYWc6N2Q1ZDRkYmI4MzRiNGJkMGIwODZlZDJhMTJmMDZlYjIvdGV4dHJlZ2lvbjo3ZDVkNGRiYjgzNGI0YmQwYjA4NmVkMmExMmYwNmViMl8xNjQy_da08668a-7949-4472-9669-dc3f566b15c0">8-K</dei:DocumentType>
    <dei:DocumentPeriodEndDate
      contextRef="i3c8d5113446740d9820db6bb12915061_D20201014-20201014"
      id="id3VybDovL2RvY3MudjEvZG9jOjRkMzBiYzUzNDk0NzRiYjRiNjk3OGZlZjgzY2MyZjExL3NlYzo0ZDMwYmM1MzQ5NDc0YmI0YjY5NzhmZWY4M2NjMmYxMV8xL2ZyYWc6N2Q1ZDRkYmI4MzRiNGJkMGIwODZlZDJhMTJmMDZlYjIvdGV4dHJlZ2lvbjo3ZDVkNGRiYjgzNGI0YmQwYjA4NmVkMmExMmYwNmViMl8xNjQ2_28fb72fb-3181-4256-9874-754d419ca078">2020-10-14</dei:DocumentPeriodEndDate>
    <dei:EntityRegistrantName
      contextRef="i3c8d5113446740d9820db6bb12915061_D20201014-20201014"
      id="id3VybDovL2RvY3MudjEvZG9jOjRkMzBiYzUzNDk0NzRiYjRiNjk3OGZlZjgzY2MyZjExL3NlYzo0ZDMwYmM1MzQ5NDc0YmI0YjY5NzhmZWY4M2NjMmYxMV8xL2ZyYWc6N2Q1ZDRkYmI4MzRiNGJkMGIwODZlZDJhMTJmMDZlYjIvdGV4dHJlZ2lvbjo3ZDVkNGRiYjgzNGI0YmQwYjA4NmVkMmExMmYwNmViMl8xNjQz_3b6f840c-db68-410b-be83-efb4d347f7e3">WYNN RESORTS, LIMITED</dei:EntityRegistrantName>
    <dei:EntityIncorporationStateCountryCode
      contextRef="i3c8d5113446740d9820db6bb12915061_D20201014-20201014"
      id="id3VybDovL2RvY3MudjEvZG9jOjRkMzBiYzUzNDk0NzRiYjRiNjk3OGZlZjgzY2MyZjExL3NlYzo0ZDMwYmM1MzQ5NDc0YmI0YjY5NzhmZWY4M2NjMmYxMV8xL2ZyYWc6N2Q1ZDRkYmI4MzRiNGJkMGIwODZlZDJhMTJmMDZlYjIvdGFibGU6YmJkMDJhNThmNmJmNGY4ODk1OWY4N2IzMmRjZjhmZTUvdGFibGVyYW5nZTpiYmQwMmE1OGY2YmY0Zjg4OTU5Zjg3YjMyZGNmOGZlNV8wLTAtMS0xLTA_9c91d8ee-0f93-43f9-a6c6-9636c3f7dcf1">NV</dei:EntityIncorporationStateCountryCode>
    <dei:EntityFileNumber
      contextRef="i3c8d5113446740d9820db6bb12915061_D20201014-20201014"
      id="id3VybDovL2RvY3MudjEvZG9jOjRkMzBiYzUzNDk0NzRiYjRiNjk3OGZlZjgzY2MyZjExL3NlYzo0ZDMwYmM1MzQ5NDc0YmI0YjY5NzhmZWY4M2NjMmYxMV8xL2ZyYWc6N2Q1ZDRkYmI4MzRiNGJkMGIwODZlZDJhMTJmMDZlYjIvdGFibGU6YmJkMDJhNThmNmJmNGY4ODk1OWY4N2IzMmRjZjhmZTUvdGFibGVyYW5nZTpiYmQwMmE1OGY2YmY0Zjg4OTU5Zjg3YjMyZGNmOGZlNV8wLTItMS0xLTA_928c6441-acc2-4026-9ad2-2676969bba48">000-50028</dei:EntityFileNumber>
    <dei:EntityTaxIdentificationNumber
      contextRef="i3c8d5113446740d9820db6bb12915061_D20201014-20201014"
      id="id3VybDovL2RvY3MudjEvZG9jOjRkMzBiYzUzNDk0NzRiYjRiNjk3OGZlZjgzY2MyZjExL3NlYzo0ZDMwYmM1MzQ5NDc0YmI0YjY5NzhmZWY4M2NjMmYxMV8xL2ZyYWc6N2Q1ZDRkYmI4MzRiNGJkMGIwODZlZDJhMTJmMDZlYjIvdGFibGU6YmJkMDJhNThmNmJmNGY4ODk1OWY4N2IzMmRjZjhmZTUvdGFibGVyYW5nZTpiYmQwMmE1OGY2YmY0Zjg4OTU5Zjg3YjMyZGNmOGZlNV8wLTMtMS0xLTA_5108f005-4499-49b4-89b7-c68279b610d9">46-0484987</dei:EntityTaxIdentificationNumber>
    <dei:EntityAddressAddressLine1
      contextRef="i3c8d5113446740d9820db6bb12915061_D20201014-20201014"
      id="id3VybDovL2RvY3MudjEvZG9jOjRkMzBiYzUzNDk0NzRiYjRiNjk3OGZlZjgzY2MyZjExL3NlYzo0ZDMwYmM1MzQ5NDc0YmI0YjY5NzhmZWY4M2NjMmYxMV8xL2ZyYWc6N2Q1ZDRkYmI4MzRiNGJkMGIwODZlZDJhMTJmMDZlYjIvdGFibGU6YmJkMDJhNThmNmJmNGY4ODk1OWY4N2IzMmRjZjhmZTUvdGFibGVyYW5nZTpiYmQwMmE1OGY2YmY0Zjg4OTU5Zjg3YjMyZGNmOGZlNV8yLTAtMS0xLTA_eed34f1c-667f-477f-9b90-3b5bfbb46010">3131 Las Vegas Boulevard South</dei:EntityAddressAddressLine1>
    <dei:EntityAddressCityOrTown
      contextRef="i3c8d5113446740d9820db6bb12915061_D20201014-20201014"
      id="id3VybDovL2RvY3MudjEvZG9jOjRkMzBiYzUzNDk0NzRiYjRiNjk3OGZlZjgzY2MyZjExL3NlYzo0ZDMwYmM1MzQ5NDc0YmI0YjY5NzhmZWY4M2NjMmYxMV8xL2ZyYWc6N2Q1ZDRkYmI4MzRiNGJkMGIwODZlZDJhMTJmMDZlYjIvdGFibGU6YmJkMDJhNThmNmJmNGY4ODk1OWY4N2IzMmRjZjhmZTUvdGFibGVyYW5nZTpiYmQwMmE1OGY2YmY0Zjg4OTU5Zjg3YjMyZGNmOGZlNV8zLTAtMS0xLTA_f623ef7b-d692-4fb3-a1ed-1ead84f25d96">Las Vegas,</dei:EntityAddressCityOrTown>
    <dei:EntityAddressStateOrProvince
      contextRef="i3c8d5113446740d9820db6bb12915061_D20201014-20201014"
      id="id3VybDovL2RvY3MudjEvZG9jOjRkMzBiYzUzNDk0NzRiYjRiNjk3OGZlZjgzY2MyZjExL3NlYzo0ZDMwYmM1MzQ5NDc0YmI0YjY5NzhmZWY4M2NjMmYxMV8xL2ZyYWc6N2Q1ZDRkYmI4MzRiNGJkMGIwODZlZDJhMTJmMDZlYjIvdGFibGU6YmJkMDJhNThmNmJmNGY4ODk1OWY4N2IzMmRjZjhmZTUvdGFibGVyYW5nZTpiYmQwMmE1OGY2YmY0Zjg4OTU5Zjg3YjMyZGNmOGZlNV8zLTEtMS0xLTA_ce6d00b7-2a03-411f-857a-015e2cbd46ca">NV</dei:EntityAddressStateOrProvince>
    <dei:EntityAddressPostalZipCode
      contextRef="i3c8d5113446740d9820db6bb12915061_D20201014-20201014"
      id="id3VybDovL2RvY3MudjEvZG9jOjRkMzBiYzUzNDk0NzRiYjRiNjk3OGZlZjgzY2MyZjExL3NlYzo0ZDMwYmM1MzQ5NDc0YmI0YjY5NzhmZWY4M2NjMmYxMV8xL2ZyYWc6N2Q1ZDRkYmI4MzRiNGJkMGIwODZlZDJhMTJmMDZlYjIvdGFibGU6YmJkMDJhNThmNmJmNGY4ODk1OWY4N2IzMmRjZjhmZTUvdGFibGVyYW5nZTpiYmQwMmE1OGY2YmY0Zjg4OTU5Zjg3YjMyZGNmOGZlNV8zLTMtMS0xLTA_5ae811f7-23f3-47fd-952f-b7d626135d8d">89109</dei:EntityAddressPostalZipCode>
    <dei:CityAreaCode
      contextRef="i3c8d5113446740d9820db6bb12915061_D20201014-20201014"
      id="id3VybDovL2RvY3MudjEvZG9jOjRkMzBiYzUzNDk0NzRiYjRiNjk3OGZlZjgzY2MyZjExL3NlYzo0ZDMwYmM1MzQ5NDc0YmI0YjY5NzhmZWY4M2NjMmYxMV8xL2ZyYWc6N2Q1ZDRkYmI4MzRiNGJkMGIwODZlZDJhMTJmMDZlYjIvdGV4dHJlZ2lvbjo3ZDVkNGRiYjgzNGI0YmQwYjA4NmVkMmExMmYwNmViMl8xNjQ0_873a7473-6233-45dd-bdbe-9a728ae8d96f">702</dei:CityAreaCode>
    <dei:LocalPhoneNumber
      contextRef="i3c8d5113446740d9820db6bb12915061_D20201014-20201014"
      id="id3VybDovL2RvY3MudjEvZG9jOjRkMzBiYzUzNDk0NzRiYjRiNjk3OGZlZjgzY2MyZjExL3NlYzo0ZDMwYmM1MzQ5NDc0YmI0YjY5NzhmZWY4M2NjMmYxMV8xL2ZyYWc6N2Q1ZDRkYmI4MzRiNGJkMGIwODZlZDJhMTJmMDZlYjIvdGV4dHJlZ2lvbjo3ZDVkNGRiYjgzNGI0YmQwYjA4NmVkMmExMmYwNmViMl8xNjM5_4d645da7-391d-4441-a1d3-0a75599bc04d">770-7555</dei:LocalPhoneNumber>
    <dei:Security12bTitle
      contextRef="i3c8d5113446740d9820db6bb12915061_D20201014-20201014"
      id="id3VybDovL2RvY3MudjEvZG9jOjRkMzBiYzUzNDk0NzRiYjRiNjk3OGZlZjgzY2MyZjExL3NlYzo0ZDMwYmM1MzQ5NDc0YmI0YjY5NzhmZWY4M2NjMmYxMV8xL2ZyYWc6N2Q1ZDRkYmI4MzRiNGJkMGIwODZlZDJhMTJmMDZlYjIvdGFibGU6OTgzM2RiNDcwOWMzNDgzZmFkMzU1NjdmMDBjZGZlZTMvdGFibGVyYW5nZTo5ODMzZGI0NzA5YzM0ODNmYWQzNTU2N2YwMGNkZmVlM18xLTAtMS0xLTA_66065b4d-8b5c-4c4a-b514-0edb3e00bf24">Common stock, par value $0.01</dei:Security12bTitle>
    <dei:TradingSymbol
      contextRef="i3c8d5113446740d9820db6bb12915061_D20201014-20201014"
      id="id3VybDovL2RvY3MudjEvZG9jOjRkMzBiYzUzNDk0NzRiYjRiNjk3OGZlZjgzY2MyZjExL3NlYzo0ZDMwYmM1MzQ5NDc0YmI0YjY5NzhmZWY4M2NjMmYxMV8xL2ZyYWc6N2Q1ZDRkYmI4MzRiNGJkMGIwODZlZDJhMTJmMDZlYjIvdGFibGU6OTgzM2RiNDcwOWMzNDgzZmFkMzU1NjdmMDBjZGZlZTMvdGFibGVyYW5nZTo5ODMzZGI0NzA5YzM0ODNmYWQzNTU2N2YwMGNkZmVlM18xLTItMS0xLTA_c407c5f7-c060-469d-a2b0-424f5318df9c">WYNN</dei:TradingSymbol>
    <dei:SecurityExchangeName
      contextRef="i3c8d5113446740d9820db6bb12915061_D20201014-20201014"
      id="id3VybDovL2RvY3MudjEvZG9jOjRkMzBiYzUzNDk0NzRiYjRiNjk3OGZlZjgzY2MyZjExL3NlYzo0ZDMwYmM1MzQ5NDc0YmI0YjY5NzhmZWY4M2NjMmYxMV8xL2ZyYWc6N2Q1ZDRkYmI4MzRiNGJkMGIwODZlZDJhMTJmMDZlYjIvdGFibGU6OTgzM2RiNDcwOWMzNDgzZmFkMzU1NjdmMDBjZGZlZTMvdGFibGVyYW5nZTo5ODMzZGI0NzA5YzM0ODNmYWQzNTU2N2YwMGNkZmVlM18xLTQtMS0xLTA_7f3a5c74-4e9a-4b73-ad3e-e6e30d272b4f">NASDAQ</dei:SecurityExchangeName>
    <dei:WrittenCommunications
      contextRef="i3c8d5113446740d9820db6bb12915061_D20201014-20201014"
      id="id3VybDovL2RvY3MudjEvZG9jOjRkMzBiYzUzNDk0NzRiYjRiNjk3OGZlZjgzY2MyZjExL3NlYzo0ZDMwYmM1MzQ5NDc0YmI0YjY5NzhmZWY4M2NjMmYxMV8xL2ZyYWc6N2Q1ZDRkYmI4MzRiNGJkMGIwODZlZDJhMTJmMDZlYjIvdGV4dHJlZ2lvbjo3ZDVkNGRiYjgzNGI0YmQwYjA4NmVkMmExMmYwNmViMl8xNjQ3_017a0987-cc63-476d-8c21-09d8fe6e0770">false</dei:WrittenCommunications>
    <dei:SolicitingMaterial
      contextRef="i3c8d5113446740d9820db6bb12915061_D20201014-20201014"
      id="id3VybDovL2RvY3MudjEvZG9jOjRkMzBiYzUzNDk0NzRiYjRiNjk3OGZlZjgzY2MyZjExL3NlYzo0ZDMwYmM1MzQ5NDc0YmI0YjY5NzhmZWY4M2NjMmYxMV8xL2ZyYWc6N2Q1ZDRkYmI4MzRiNGJkMGIwODZlZDJhMTJmMDZlYjIvdGV4dHJlZ2lvbjo3ZDVkNGRiYjgzNGI0YmQwYjA4NmVkMmExMmYwNmViMl8xNjQ4_61423ee4-651d-413f-8673-31be99ca3095">false</dei:SolicitingMaterial>
    <dei:PreCommencementTenderOffer
      contextRef="i3c8d5113446740d9820db6bb12915061_D20201014-20201014"
      id="id3VybDovL2RvY3MudjEvZG9jOjRkMzBiYzUzNDk0NzRiYjRiNjk3OGZlZjgzY2MyZjExL3NlYzo0ZDMwYmM1MzQ5NDc0YmI0YjY5NzhmZWY4M2NjMmYxMV8xL2ZyYWc6N2Q1ZDRkYmI4MzRiNGJkMGIwODZlZDJhMTJmMDZlYjIvdGV4dHJlZ2lvbjo3ZDVkNGRiYjgzNGI0YmQwYjA4NmVkMmExMmYwNmViMl8xNjQ1_6f3243b8-328a-45b4-9046-90c8cd37f422">false</dei:PreCommencementTenderOffer>
    <dei:PreCommencementIssuerTenderOffer
      contextRef="i3c8d5113446740d9820db6bb12915061_D20201014-20201014"
      id="id3VybDovL2RvY3MudjEvZG9jOjRkMzBiYzUzNDk0NzRiYjRiNjk3OGZlZjgzY2MyZjExL3NlYzo0ZDMwYmM1MzQ5NDc0YmI0YjY5NzhmZWY4M2NjMmYxMV8xL2ZyYWc6N2Q1ZDRkYmI4MzRiNGJkMGIwODZlZDJhMTJmMDZlYjIvdGV4dHJlZ2lvbjo3ZDVkNGRiYjgzNGI0YmQwYjA4NmVkMmExMmYwNmViMl8xNjQw_8a50ea0b-05df-446b-a42a-7021699dc194">false</dei:PreCommencementIssuerTenderOffer>
    <dei:EntityEmergingGrowthCompany
      contextRef="i3c8d5113446740d9820db6bb12915061_D20201014-20201014"
      id="id3VybDovL2RvY3MudjEvZG9jOjRkMzBiYzUzNDk0NzRiYjRiNjk3OGZlZjgzY2MyZjExL3NlYzo0ZDMwYmM1MzQ5NDc0YmI0YjY5NzhmZWY4M2NjMmYxMV8xL2ZyYWc6N2Q1ZDRkYmI4MzRiNGJkMGIwODZlZDJhMTJmMDZlYjIvdGV4dHJlZ2lvbjo3ZDVkNGRiYjgzNGI0YmQwYjA4NmVkMmExMmYwNmViMl8xNjQx_ddc349ee-0617-4d36-8d2b-89827cddd340">false</dei:EntityEmergingGrowthCompany>
</xbrl>
