<?xml version="1.0" encoding="utf-8"?>
<xbrl
  xmlns="http://www.xbrl.org/2003/instance"
  xmlns:dei="http://xbrl.sec.gov/dei/2019-01-31"
  xmlns:exch="http://xbrl.sec.gov/exch/2019-01-31"
  xmlns:fis="http://www.fisglobal.com/20190808"
  xmlns:link="http://www.xbrl.org/2003/linkbase"
  xmlns:us-gaap="http://fasb.org/us-gaap/2019-01-31"
  xmlns:xbrldi="http://xbrl.org/2006/xbrldi"
  xmlns:xlink="http://www.w3.org/1999/xlink">
    <link:schemaRef xlink:href="fis-20190808.xsd" xlink:type="simple"/>
    <context id="D2019Q3August8">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001136893</identifier>
        </entity>
        <period>
            <startDate>2019-08-08</startDate>
            <endDate>2019-08-08</endDate>
        </period>
    </context>
    <context id="D2019Q3August8_dei_EntityListingsExchangeAxis_exch_XNYS_us-gaap_DebtInstrumentAxis_fis_PointOnetwoFivePercentEuroSeniorNotesDueMay2021Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001136893</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap:DebtInstrumentAxis">fis:PointOnetwoFivePercentEuroSeniorNotesDueMay2021Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:EntityListingsExchangeAxis">exch:XNYS</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2019-08-08</startDate>
            <endDate>2019-08-08</endDate>
        </period>
    </context>
    <context id="D2019Q3August8_dei_EntityListingsExchangeAxis_exch_XNYS_us-gaap_DebtInstrumentAxis_fis_TwoPointSixZeroTwoPercentSterlingSeniorNotesDueMay2025Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001136893</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap:DebtInstrumentAxis">fis:TwoPointSixZeroTwoPercentSterlingSeniorNotesDueMay2025Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:EntityListingsExchangeAxis">exch:XNYS</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2019-08-08</startDate>
            <endDate>2019-08-08</endDate>
        </period>
    </context>
    <context id="D2019Q3August8_dei_EntityListingsExchangeAxis_exch_XNYS_us-gaap_DebtInstrumentAxis_fis_PointSevenFivePercentEuroSeniorNotesDue2023Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001136893</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap:DebtInstrumentAxis">fis:PointSevenFivePercentEuroSeniorNotesDue2023Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:EntityListingsExchangeAxis">exch:XNYS</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2019-08-08</startDate>
            <endDate>2019-08-08</endDate>
        </period>
    </context>
    <context id="D2019Q3August8_dei_EntityListingsExchangeAxis_exch_XNYS_us-gaap_DebtInstrumentAxis_fis_TwoPointNineFivePercentEuroSeniorNotesDueMay2039Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001136893</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap:DebtInstrumentAxis">fis:TwoPointNineFivePercentEuroSeniorNotesDueMay2039Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:EntityListingsExchangeAxis">exch:XNYS</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2019-08-08</startDate>
            <endDate>2019-08-08</endDate>
        </period>
    </context>
    <context id="D2019Q3August8_dei_EntityListingsExchangeAxis_exch_XNYS_us-gaap_DebtInstrumentAxis_fis_ThreePointThreeSixPercentSterlingSeniorNotesDueMay2031Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001136893</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap:DebtInstrumentAxis">fis:ThreePointThreeSixPercentSterlingSeniorNotesDueMay2031Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:EntityListingsExchangeAxis">exch:XNYS</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2019-08-08</startDate>
            <endDate>2019-08-08</endDate>
        </period>
    </context>
    <context id="D2019Q3August8_dei_EntityListingsExchangeAxis_exch_XNYS_us-gaap_DebtInstrumentAxis_fis_OnePointOnePercentEuroSeniorNotesDueJuly2024Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001136893</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap:DebtInstrumentAxis">fis:OnePointOnePercentEuroSeniorNotesDueJuly2024Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:EntityListingsExchangeAxis">exch:XNYS</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2019-08-08</startDate>
            <endDate>2019-08-08</endDate>
        </period>
    </context>
    <context id="D2019Q3August8_dei_EntityListingsExchangeAxis_exch_XNYS">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001136893</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:EntityListingsExchangeAxis">exch:XNYS</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2019-08-08</startDate>
            <endDate>2019-08-08</endDate>
        </period>
    </context>
    <context id="D2019Q3August8_dei_EntityListingsExchangeAxis_exch_XNYS_us-gaap_DebtInstrumentAxis_fis_SeniorEuroFloatingRateNotesdueMay2021Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001136893</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap:DebtInstrumentAxis">fis:SeniorEuroFloatingRateNotesdueMay2021Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:EntityListingsExchangeAxis">exch:XNYS</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2019-08-08</startDate>
            <endDate>2019-08-08</endDate>
        </period>
    </context>
    <context id="D2019Q3August8_dei_EntityListingsExchangeAxis_exch_XNYS_us-gaap_DebtInstrumentAxis_fis_TwoPointZeroPercentEuroSeniorNotesDueMay2030Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001136893</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap:DebtInstrumentAxis">fis:TwoPointZeroPercentEuroSeniorNotesDueMay2030Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:EntityListingsExchangeAxis">exch:XNYS</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2019-08-08</startDate>
            <endDate>2019-08-08</endDate>
        </period>
    </context>
    <context id="D2019Q3August8_dei_EntityListingsExchangeAxis_exch_XNYS_us-gaap_DebtInstrumentAxis_fis_OnePointSevenPercentGBPSeniorNotesDueJune2022Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001136893</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap:DebtInstrumentAxis">fis:OnePointSevenPercentGBPSeniorNotesDueJune2022Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:EntityListingsExchangeAxis">exch:XNYS</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2019-08-08</startDate>
            <endDate>2019-08-08</endDate>
        </period>
    </context>
    <context id="D2019Q3August8_dei_EntityListingsExchangeAxis_exch_XNYS_us-gaap_DebtInstrumentAxis_fis_PointFourZeroPercentEuroSeniorNotesDueJanuary2021Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001136893</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap:DebtInstrumentAxis">fis:PointFourZeroPercentEuroSeniorNotesDueJanuary2021Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:EntityListingsExchangeAxis">exch:XNYS</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2019-08-08</startDate>
            <endDate>2019-08-08</endDate>
        </period>
    </context>
    <context id="D2019Q3August8_dei_EntityListingsExchangeAxis_exch_XNYS_us-gaap_DebtInstrumentAxis_fis_OnePointFivePercentEuroSeniorNotesDueMay2027Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001136893</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap:DebtInstrumentAxis">fis:OnePointFivePercentEuroSeniorNotesDueMay2027Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:EntityListingsExchangeAxis">exch:XNYS</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2019-08-08</startDate>
            <endDate>2019-08-08</endDate>
        </period>
    </context>
    <dei:AmendmentFlag
      contextRef="D2019Q3August8"
      id="Fact-BFAC2053A54D5BB1A27FBE092BAA426D-wk-Fact-BFAC2053A54D5BB1A27FBE092BAA426D">false</dei:AmendmentFlag>
    <dei:EntityCentralIndexKey
      contextRef="D2019Q3August8"
      id="Fact-81A3E0A10C415CA78558DFD59B835AB5-wk-Fact-81A3E0A10C415CA78558DFD59B835AB5">0001136893</dei:EntityCentralIndexKey>
    <dei:DocumentType
      contextRef="D2019Q3August8"
      id="d84515448e115-wk-Fact-563B5E278D5A581584DD5986D98E1452">8-K</dei:DocumentType>
    <dei:DocumentPeriodEndDate
      contextRef="D2019Q3August8"
      id="d84515448e134-wk-Fact-59C0CED759C95F7981CA5C6F22F6E0D4">2019-08-08</dei:DocumentPeriodEndDate>
    <dei:EntityRegistrantName
      contextRef="D2019Q3August8"
      id="d84515448e142-wk-Fact-11971A3773E35A3199E4C80659E66FAA">Fidelity National Information Services, Inc.</dei:EntityRegistrantName>
    <dei:EntityFileNumber
      contextRef="D2019Q3August8"
      id="d84515448e153-wk-Fact-0476DC587B515249B95161BB2221A3BE">1-16427</dei:EntityFileNumber>
    <dei:EntityIncorporationStateCountryCode
      contextRef="D2019Q3August8"
      id="d84515448e213-wk-Fact-8233425412425B92A4B529C8786ABC05">GA</dei:EntityIncorporationStateCountryCode>
    <dei:EntityTaxIdentificationNumber
      contextRef="D2019Q3August8"
      id="d84515448e223-wk-Fact-E753FA0AB6B7569B8F83C31A99F276E2">37-1490331</dei:EntityTaxIdentificationNumber>
    <dei:EntityAddressAddressLine1
      contextRef="D2019Q3August8"
      id="d84515448e242-wk-Fact-98481EB6BE2C5F0487A80F8425463905">601 Riverside Avenue</dei:EntityAddressAddressLine1>
    <dei:EntityAddressCityOrTown
      contextRef="D2019Q3August8"
      id="d84515448e250-wk-Fact-51F276B0E95E5CC4BBC443BEB1FA0BE3">Jacksonville</dei:EntityAddressCityOrTown>
    <dei:EntityAddressStateOrProvince
      contextRef="D2019Q3August8"
      id="d84515448e255-wk-Fact-251A0D7F7A335252AC18B907FF1BCC75">FL</dei:EntityAddressStateOrProvince>
    <dei:EntityAddressPostalZipCode
      contextRef="D2019Q3August8"
      id="d84515448e260-wk-Fact-8F388C83A33B519D8380A28E2D9F2F40">32204</dei:EntityAddressPostalZipCode>
    <dei:CityAreaCode
      contextRef="D2019Q3August8"
      id="d84515448e274-wk-Fact-369070E19CCE5146B0FAFED0911B1BD2">904</dei:CityAreaCode>
    <dei:LocalPhoneNumber
      contextRef="D2019Q3August8"
      id="d84515448e279-wk-Fact-323BD619EB1A5B0A8606E9D0D64D9DD0">438-6000</dei:LocalPhoneNumber>
    <dei:WrittenCommunications
      contextRef="D2019Q3August8"
      id="d84515448e336-wk-Fact-61C561AD4F31549BB3A2F2A26F0597CE">false</dei:WrittenCommunications>
    <dei:SolicitingMaterial
      contextRef="D2019Q3August8"
      id="d84515448e368-wk-Fact-F830E80477985292BC22BAF3382BE004">false</dei:SolicitingMaterial>
    <dei:PreCommencementTenderOffer
      contextRef="D2019Q3August8"
      id="d84515448e400-wk-Fact-665A6BEF69EE5C2EAA631D79989BEA87">false</dei:PreCommencementTenderOffer>
    <dei:PreCommencementIssuerTenderOffer
      contextRef="D2019Q3August8"
      id="d84515448e432-wk-Fact-28742D81C7375636880E6E1754FA171F">false</dei:PreCommencementIssuerTenderOffer>
    <dei:Security12bTitle
      contextRef="D2019Q3August8_dei_EntityListingsExchangeAxis_exch_XNYS"
      id="d84515448e564-wk-Fact-F8D4A569C1265DD3851205E745515827">Common Stock, par value $0.01 per share</dei:Security12bTitle>
    <dei:TradingSymbol
      contextRef="D2019Q3August8_dei_EntityListingsExchangeAxis_exch_XNYS"
      id="d84515448e574-wk-Fact-0F6E7F9B54D6572BBCA8F5165313395B">FIS</dei:TradingSymbol>
    <dei:SecurityExchangeName
      contextRef="D2019Q3August8_dei_EntityListingsExchangeAxis_exch_XNYS"
      id="d84515448e584-wk-Fact-CC016AB34E955D4F8DFDFC4ED1B9AC01">NYSE</dei:SecurityExchangeName>
    <dei:Security12bTitle
      contextRef="D2019Q3August8_dei_EntityListingsExchangeAxis_exch_XNYS_us-gaap_DebtInstrumentAxis_fis_PointFourZeroPercentEuroSeniorNotesDueJanuary2021Member"
      id="d84515448e590-wk-Fact-C627B07E316A5D2DA931E8B9862C702F">0.400% Senior Notes due 2021</dei:Security12bTitle>
    <dei:TradingSymbol
      contextRef="D2019Q3August8_dei_EntityListingsExchangeAxis_exch_XNYS_us-gaap_DebtInstrumentAxis_fis_PointFourZeroPercentEuroSeniorNotesDueJanuary2021Member"
      id="d84515448e600-wk-Fact-1ABE52AE96CF5244B7D0B9CF4FFDF1EF">FIS21A</dei:TradingSymbol>
    <dei:SecurityExchangeName
      contextRef="D2019Q3August8_dei_EntityListingsExchangeAxis_exch_XNYS_us-gaap_DebtInstrumentAxis_fis_PointFourZeroPercentEuroSeniorNotesDueJanuary2021Member"
      id="d84515448e610-wk-Fact-D00C31BC54EC503B9E4C425B47F3E669">NYSE</dei:SecurityExchangeName>
    <dei:Security12bTitle
      contextRef="D2019Q3August8_dei_EntityListingsExchangeAxis_exch_XNYS_us-gaap_DebtInstrumentAxis_fis_SeniorEuroFloatingRateNotesdueMay2021Member"
      id="d84515448e616-wk-Fact-E1B1BA88CD1252DE98DC5BA1CEEB30E6">Floating Rate Senior Notes due 2021</dei:Security12bTitle>
    <dei:TradingSymbol
      contextRef="D2019Q3August8_dei_EntityListingsExchangeAxis_exch_XNYS_us-gaap_DebtInstrumentAxis_fis_SeniorEuroFloatingRateNotesdueMay2021Member"
      id="d84515448e626-wk-Fact-2C8ABC2E105F5FCFAD8CDE2DE9A809AC">FIS21B</dei:TradingSymbol>
    <dei:SecurityExchangeName
      contextRef="D2019Q3August8_dei_EntityListingsExchangeAxis_exch_XNYS_us-gaap_DebtInstrumentAxis_fis_SeniorEuroFloatingRateNotesdueMay2021Member"
      id="d84515448e636-wk-Fact-6F208DA4931E5E2892FEAD1CE273CACF">NYSE</dei:SecurityExchangeName>
    <dei:Security12bTitle
      contextRef="D2019Q3August8_dei_EntityListingsExchangeAxis_exch_XNYS_us-gaap_DebtInstrumentAxis_fis_PointOnetwoFivePercentEuroSeniorNotesDueMay2021Member"
      id="d84515448e642-wk-Fact-D180988282325ED8BCC6ECF2A9790F62">0.125% Senior Notes due 2021</dei:Security12bTitle>
    <dei:TradingSymbol
      contextRef="D2019Q3August8_dei_EntityListingsExchangeAxis_exch_XNYS_us-gaap_DebtInstrumentAxis_fis_PointOnetwoFivePercentEuroSeniorNotesDueMay2021Member"
      id="d84515448e652-wk-Fact-945E2EA7BC47547397F75AA1B194DAB5">FIS21C</dei:TradingSymbol>
    <dei:SecurityExchangeName
      contextRef="D2019Q3August8_dei_EntityListingsExchangeAxis_exch_XNYS_us-gaap_DebtInstrumentAxis_fis_PointOnetwoFivePercentEuroSeniorNotesDueMay2021Member"
      id="d84515448e662-wk-Fact-E9FB13C02CF1521FBE8C36710CEB6712">NYSE</dei:SecurityExchangeName>
    <dei:Security12bTitle
      contextRef="D2019Q3August8_dei_EntityListingsExchangeAxis_exch_XNYS_us-gaap_DebtInstrumentAxis_fis_OnePointSevenPercentGBPSeniorNotesDueJune2022Member"
      id="d84515448e668-wk-Fact-67E742D36A0457F69983C2E2F97A3FA5">1.700% Senior Notes due 2022</dei:Security12bTitle>
    <dei:TradingSymbol
      contextRef="D2019Q3August8_dei_EntityListingsExchangeAxis_exch_XNYS_us-gaap_DebtInstrumentAxis_fis_OnePointSevenPercentGBPSeniorNotesDueJune2022Member"
      id="d84515448e678-wk-Fact-A44232EB25B55D869A6E6995151D248D">FIS22B</dei:TradingSymbol>
    <dei:SecurityExchangeName
      contextRef="D2019Q3August8_dei_EntityListingsExchangeAxis_exch_XNYS_us-gaap_DebtInstrumentAxis_fis_OnePointSevenPercentGBPSeniorNotesDueJune2022Member"
      id="d84515448e688-wk-Fact-7E2CCDC58A0754A9A34112EEAED49C12">NYSE</dei:SecurityExchangeName>
    <dei:Security12bTitle
      contextRef="D2019Q3August8_dei_EntityListingsExchangeAxis_exch_XNYS_us-gaap_DebtInstrumentAxis_fis_PointSevenFivePercentEuroSeniorNotesDue2023Member"
      id="d84515448e694-wk-Fact-06958400D69B5DCF957BFAC075484E2F">0.750% Senior Notes due 2023</dei:Security12bTitle>
    <dei:TradingSymbol
      contextRef="D2019Q3August8_dei_EntityListingsExchangeAxis_exch_XNYS_us-gaap_DebtInstrumentAxis_fis_PointSevenFivePercentEuroSeniorNotesDue2023Member"
      id="d84515448e704-wk-Fact-9011F228D369521BA83FC4E1BC11FC4F">FIS23A</dei:TradingSymbol>
    <dei:SecurityExchangeName
      contextRef="D2019Q3August8_dei_EntityListingsExchangeAxis_exch_XNYS_us-gaap_DebtInstrumentAxis_fis_PointSevenFivePercentEuroSeniorNotesDue2023Member"
      id="d84515448e714-wk-Fact-92FE592958DA5931A6452A17E3A748DD">NYSE</dei:SecurityExchangeName>
    <dei:Security12bTitle
      contextRef="D2019Q3August8_dei_EntityListingsExchangeAxis_exch_XNYS_us-gaap_DebtInstrumentAxis_fis_OnePointOnePercentEuroSeniorNotesDueJuly2024Member"
      id="d84515448e720-wk-Fact-ED0D68C4D40651349241887069A8A8D5">1.100% Senior Notes due 2024</dei:Security12bTitle>
    <dei:TradingSymbol
      contextRef="D2019Q3August8_dei_EntityListingsExchangeAxis_exch_XNYS_us-gaap_DebtInstrumentAxis_fis_OnePointOnePercentEuroSeniorNotesDueJuly2024Member"
      id="d84515448e730-wk-Fact-728B8A87C75E52ECA74B4CD960A408FE">FIS24A</dei:TradingSymbol>
    <dei:SecurityExchangeName
      contextRef="D2019Q3August8_dei_EntityListingsExchangeAxis_exch_XNYS_us-gaap_DebtInstrumentAxis_fis_OnePointOnePercentEuroSeniorNotesDueJuly2024Member"
      id="d84515448e740-wk-Fact-8BA51E04A5175E78BBB9772E4310321E">NYSE</dei:SecurityExchangeName>
    <dei:Security12bTitle
      contextRef="D2019Q3August8_dei_EntityListingsExchangeAxis_exch_XNYS_us-gaap_DebtInstrumentAxis_fis_TwoPointSixZeroTwoPercentSterlingSeniorNotesDueMay2025Member"
      id="d84515448e747-wk-Fact-19B539304DA95BE3A77C34983DFFF840">2.602% Senior Notes due 2025</dei:Security12bTitle>
    <dei:TradingSymbol
      contextRef="D2019Q3August8_dei_EntityListingsExchangeAxis_exch_XNYS_us-gaap_DebtInstrumentAxis_fis_TwoPointSixZeroTwoPercentSterlingSeniorNotesDueMay2025Member"
      id="d84515448e757-wk-Fact-77974E9DC3655023A9E1FEBE824E227F">FIS25A</dei:TradingSymbol>
    <dei:SecurityExchangeName
      contextRef="D2019Q3August8_dei_EntityListingsExchangeAxis_exch_XNYS_us-gaap_DebtInstrumentAxis_fis_TwoPointSixZeroTwoPercentSterlingSeniorNotesDueMay2025Member"
      id="d84515448e767-wk-Fact-5EAD4113CC305BF08AEDCBFD82B7656E">NYSE</dei:SecurityExchangeName>
    <dei:Security12bTitle
      contextRef="D2019Q3August8_dei_EntityListingsExchangeAxis_exch_XNYS_us-gaap_DebtInstrumentAxis_fis_OnePointFivePercentEuroSeniorNotesDueMay2027Member"
      id="d84515448e773-wk-Fact-B502538D537A5E3AACD6060C67A91F48">1.500% Senior Notes due 2027</dei:Security12bTitle>
    <dei:TradingSymbol
      contextRef="D2019Q3August8_dei_EntityListingsExchangeAxis_exch_XNYS_us-gaap_DebtInstrumentAxis_fis_OnePointFivePercentEuroSeniorNotesDueMay2027Member"
      id="d84515448e783-wk-Fact-21F3BB9201C65EB19A0246775EDDAAEA">FIS27</dei:TradingSymbol>
    <dei:SecurityExchangeName
      contextRef="D2019Q3August8_dei_EntityListingsExchangeAxis_exch_XNYS_us-gaap_DebtInstrumentAxis_fis_OnePointFivePercentEuroSeniorNotesDueMay2027Member"
      id="d84515448e793-wk-Fact-6EF24B27C16A578E843206C1AD4CE49F">NYSE</dei:SecurityExchangeName>
    <dei:Security12bTitle
      contextRef="D2019Q3August8_dei_EntityListingsExchangeAxis_exch_XNYS_us-gaap_DebtInstrumentAxis_fis_TwoPointZeroPercentEuroSeniorNotesDueMay2030Member"
      id="d84515448e799-wk-Fact-4702818C72FA560D9C5E9D1069C232B6">2.000% Senior Notes due 2030</dei:Security12bTitle>
    <dei:TradingSymbol
      contextRef="D2019Q3August8_dei_EntityListingsExchangeAxis_exch_XNYS_us-gaap_DebtInstrumentAxis_fis_TwoPointZeroPercentEuroSeniorNotesDueMay2030Member"
      id="d84515448e809-wk-Fact-01C30E778E7350999B632C1557005CBD">FIS30</dei:TradingSymbol>
    <dei:SecurityExchangeName
      contextRef="D2019Q3August8_dei_EntityListingsExchangeAxis_exch_XNYS_us-gaap_DebtInstrumentAxis_fis_TwoPointZeroPercentEuroSeniorNotesDueMay2030Member"
      id="d84515448e819-wk-Fact-03741FE4AA4B5009810FAB0219D92294">NYSE</dei:SecurityExchangeName>
    <dei:Security12bTitle
      contextRef="D2019Q3August8_dei_EntityListingsExchangeAxis_exch_XNYS_us-gaap_DebtInstrumentAxis_fis_ThreePointThreeSixPercentSterlingSeniorNotesDueMay2031Member"
      id="d84515448e825-wk-Fact-08CC369260BD5FA3B7A0D5EF660DCB38">3.360% Senior Notes due 2031</dei:Security12bTitle>
    <dei:TradingSymbol
      contextRef="D2019Q3August8_dei_EntityListingsExchangeAxis_exch_XNYS_us-gaap_DebtInstrumentAxis_fis_ThreePointThreeSixPercentSterlingSeniorNotesDueMay2031Member"
      id="d84515448e835-wk-Fact-E85659217948521887F1EE41148CFC05">FIS31</dei:TradingSymbol>
    <dei:SecurityExchangeName
      contextRef="D2019Q3August8_dei_EntityListingsExchangeAxis_exch_XNYS_us-gaap_DebtInstrumentAxis_fis_ThreePointThreeSixPercentSterlingSeniorNotesDueMay2031Member"
      id="d84515448e845-wk-Fact-6FCA0E0918E05BEE967A00B87F3D0639">NYSE</dei:SecurityExchangeName>
    <dei:Security12bTitle
      contextRef="D2019Q3August8_dei_EntityListingsExchangeAxis_exch_XNYS_us-gaap_DebtInstrumentAxis_fis_TwoPointNineFivePercentEuroSeniorNotesDueMay2039Member"
      id="d84515448e851-wk-Fact-A64B98489E445782B620A324F850C11A">2.950% Senior Notes due 2039</dei:Security12bTitle>
    <dei:TradingSymbol
      contextRef="D2019Q3August8_dei_EntityListingsExchangeAxis_exch_XNYS_us-gaap_DebtInstrumentAxis_fis_TwoPointNineFivePercentEuroSeniorNotesDueMay2039Member"
      id="d84515448e861-wk-Fact-D8D0EA3A4F3252218D197B86AFE1EE60">FIS39</dei:TradingSymbol>
    <dei:SecurityExchangeName
      contextRef="D2019Q3August8_dei_EntityListingsExchangeAxis_exch_XNYS_us-gaap_DebtInstrumentAxis_fis_TwoPointNineFivePercentEuroSeniorNotesDueMay2039Member"
      id="d84515448e871-wk-Fact-30864775D3E758479942A57F9773F8CB">NYSE</dei:SecurityExchangeName>
    <dei:EntityEmergingGrowthCompany
      contextRef="D2019Q3August8"
      id="d84515448e883-wk-Fact-9770A076166258FB8DF6CBB9F6F46562">false</dei:EntityEmergingGrowthCompany>
</xbrl>
