<?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/20191104"
  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-20191104.xsd" xlink:type="simple"/>
    <context id="D2019Q4November5">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001136893</identifier>
        </entity>
        <period>
            <startDate>2019-11-05</startDate>
            <endDate>2019-11-05</endDate>
        </period>
    </context>
    <context id="D2019Q4November5_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>2019-11-05</startDate>
            <endDate>2019-11-05</endDate>
        </period>
    </context>
    <context id="D2019Q4November5_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>2019-11-05</startDate>
            <endDate>2019-11-05</endDate>
        </period>
    </context>
    <context id="D2019Q4November5_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>2019-11-05</startDate>
            <endDate>2019-11-05</endDate>
        </period>
    </context>
    <context id="D2019Q4November5_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>2019-11-05</startDate>
            <endDate>2019-11-05</endDate>
        </period>
    </context>
    <context id="D2019Q4November5_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>2019-11-05</startDate>
            <endDate>2019-11-05</endDate>
        </period>
    </context>
    <context id="D2019Q4November5_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>2019-11-05</startDate>
            <endDate>2019-11-05</endDate>
        </period>
    </context>
    <context id="D2019Q4November5_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>2019-11-05</startDate>
            <endDate>2019-11-05</endDate>
        </period>
    </context>
    <context id="D2019Q4November5_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>2019-11-05</startDate>
            <endDate>2019-11-05</endDate>
        </period>
    </context>
    <context id="D2019Q4November5_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>2019-11-05</startDate>
            <endDate>2019-11-05</endDate>
        </period>
    </context>
    <context id="D2019Q4November5_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>2019-11-05</startDate>
            <endDate>2019-11-05</endDate>
        </period>
    </context>
    <context id="D2019Q4November5_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>2019-11-05</startDate>
            <endDate>2019-11-05</endDate>
        </period>
    </context>
    <context id="D2019Q4November5_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>2019-11-05</startDate>
            <endDate>2019-11-05</endDate>
        </period>
    </context>
    <dei:AmendmentFlag
      contextRef="D2019Q4November5"
      id="Fact-EEAE1EC36ACD5FD5807B94D29F877BC0-wk-Fact-EEAE1EC36ACD5FD5807B94D29F877BC0">false</dei:AmendmentFlag>
    <dei:EntityCentralIndexKey
      contextRef="D2019Q4November5"
      id="Fact-D81A9FBE8B3051E9969C50FBDB39F6C9-wk-Fact-D81A9FBE8B3051E9969C50FBDB39F6C9">0001136893</dei:EntityCentralIndexKey>
    <dei:DocumentType
      contextRef="D2019Q4November5"
      id="d3880670e123-wk-Fact-D2E38E81564E5871886C7D8EC858FB41">8-K</dei:DocumentType>
    <dei:DocumentPeriodEndDate
      contextRef="D2019Q4November5"
      id="d3880670e142-wk-Fact-4BA8396D5A1F5F5A9D9E8AA9E4FD9543">2019-11-05</dei:DocumentPeriodEndDate>
    <dei:EntityRegistrantName
      contextRef="D2019Q4November5"
      id="d3880670e150-wk-Fact-DC60BB28AF16532BB368DCC7D6CE357A">Fidelity National Information Services, Inc.</dei:EntityRegistrantName>
    <dei:EntityFileNumber
      contextRef="D2019Q4November5"
      id="d3880670e161-wk-Fact-D32AAC730F855F77B56BE957F8C51DF2">1-16427</dei:EntityFileNumber>
    <dei:EntityIncorporationStateCountryCode
      contextRef="D2019Q4November5"
      id="d3880670e221-wk-Fact-CB13F3901AF25DE1A9727F1E2153169A">GA</dei:EntityIncorporationStateCountryCode>
    <dei:EntityTaxIdentificationNumber
      contextRef="D2019Q4November5"
      id="d3880670e231-wk-Fact-391A61B84F665A08A44583EB20450D63">37-1490331</dei:EntityTaxIdentificationNumber>
    <dei:EntityAddressAddressLine1
      contextRef="D2019Q4November5"
      id="d3880670e250-wk-Fact-170A874DAEB85984A33400D2A9FAE665">601 Riverside Avenue</dei:EntityAddressAddressLine1>
    <dei:EntityAddressCityOrTown
      contextRef="D2019Q4November5"
      id="d3880670e258-wk-Fact-96F0F3BC8DF755659445888E3F8E4B76">Jacksonville</dei:EntityAddressCityOrTown>
    <dei:EntityAddressStateOrProvince
      contextRef="D2019Q4November5"
      id="d3880670e263-wk-Fact-DE177FDBA36F57DEAE3357F6F442B75D">FL</dei:EntityAddressStateOrProvince>
    <dei:EntityAddressPostalZipCode
      contextRef="D2019Q4November5"
      id="d3880670e268-wk-Fact-B9A19DCD62015857BFA13ED77602C674">32204</dei:EntityAddressPostalZipCode>
    <dei:CityAreaCode
      contextRef="D2019Q4November5"
      id="d3880670e282-wk-Fact-3CCB0CB898DB5449AF89B130C4A88834">904</dei:CityAreaCode>
    <dei:LocalPhoneNumber
      contextRef="D2019Q4November5"
      id="d3880670e287-wk-Fact-D2FAEB8D808A599E8A54016BDF6BA466">438-6000</dei:LocalPhoneNumber>
    <dei:WrittenCommunications
      contextRef="D2019Q4November5"
      id="d3880670e344-wk-Fact-988467BD5662569B9B370AA39716652A">false</dei:WrittenCommunications>
    <dei:SolicitingMaterial
      contextRef="D2019Q4November5"
      id="d3880670e376-wk-Fact-791F0C4027BC5EF9BC5381CB203B605F">false</dei:SolicitingMaterial>
    <dei:PreCommencementTenderOffer
      contextRef="D2019Q4November5"
      id="d3880670e408-wk-Fact-0329B6B4D32A5769A25C427771548110">false</dei:PreCommencementTenderOffer>
    <dei:PreCommencementIssuerTenderOffer
      contextRef="D2019Q4November5"
      id="d3880670e440-wk-Fact-F06C720E7C715C4E8B38E0ECCFC37449">false</dei:PreCommencementIssuerTenderOffer>
    <dei:Security12bTitle
      contextRef="D2019Q4November5_dei_EntityListingsExchangeAxis_exch_XNYS"
      id="d3880670e572-wk-Fact-0E97290B4F9E538A96B41ACC9EF07C8B">Common Stock, par value $0.01 per share</dei:Security12bTitle>
    <dei:TradingSymbol
      contextRef="D2019Q4November5_dei_EntityListingsExchangeAxis_exch_XNYS"
      id="d3880670e582-wk-Fact-6E612F7F35745E77827A63BDF58B2666">FIS</dei:TradingSymbol>
    <dei:SecurityExchangeName
      contextRef="D2019Q4November5_dei_EntityListingsExchangeAxis_exch_XNYS"
      id="d3880670e592-wk-Fact-7F9344A486B750D8A6F42E583017A8D2">NYSE</dei:SecurityExchangeName>
    <dei:Security12bTitle
      contextRef="D2019Q4November5_dei_EntityListingsExchangeAxis_exch_XNYS_us-gaap_DebtInstrumentAxis_fis_PointFourZeroPercentEuroSeniorNotesDueJanuary2021Member"
      id="d3880670e598-wk-Fact-64FB2B622A445679BEA301DFA86FA2FF">0.400% Senior Notes due 2021</dei:Security12bTitle>
    <dei:TradingSymbol
      contextRef="D2019Q4November5_dei_EntityListingsExchangeAxis_exch_XNYS_us-gaap_DebtInstrumentAxis_fis_PointFourZeroPercentEuroSeniorNotesDueJanuary2021Member"
      id="d3880670e608-wk-Fact-637E81373CF15A9191FC55A60F78F38F">FIS21A</dei:TradingSymbol>
    <dei:SecurityExchangeName
      contextRef="D2019Q4November5_dei_EntityListingsExchangeAxis_exch_XNYS_us-gaap_DebtInstrumentAxis_fis_PointFourZeroPercentEuroSeniorNotesDueJanuary2021Member"
      id="d3880670e618-wk-Fact-39343AC70E5E50E6B5C79EB73C67C7C3">NYSE</dei:SecurityExchangeName>
    <dei:Security12bTitle
      contextRef="D2019Q4November5_dei_EntityListingsExchangeAxis_exch_XNYS_us-gaap_DebtInstrumentAxis_fis_SeniorEuroFloatingRateNotesdueMay2021Member"
      id="d3880670e624-wk-Fact-661C141F759B56FCA787277D4D85D6D6">Floating Rate Senior Notes due 2021</dei:Security12bTitle>
    <dei:TradingSymbol
      contextRef="D2019Q4November5_dei_EntityListingsExchangeAxis_exch_XNYS_us-gaap_DebtInstrumentAxis_fis_SeniorEuroFloatingRateNotesdueMay2021Member"
      id="d3880670e634-wk-Fact-2E013C740D83525E836D569C53DA9C6F">FIS21B</dei:TradingSymbol>
    <dei:SecurityExchangeName
      contextRef="D2019Q4November5_dei_EntityListingsExchangeAxis_exch_XNYS_us-gaap_DebtInstrumentAxis_fis_SeniorEuroFloatingRateNotesdueMay2021Member"
      id="d3880670e644-wk-Fact-DBBDB783663C54658F341744625B8836">NYSE</dei:SecurityExchangeName>
    <dei:Security12bTitle
      contextRef="D2019Q4November5_dei_EntityListingsExchangeAxis_exch_XNYS_us-gaap_DebtInstrumentAxis_fis_PointOnetwoFivePercentEuroSeniorNotesDueMay2021Member"
      id="d3880670e650-wk-Fact-6BFF6AA9FC0E5BDCB66FE95450C388D1">0.125% Senior Notes due 2021</dei:Security12bTitle>
    <dei:TradingSymbol
      contextRef="D2019Q4November5_dei_EntityListingsExchangeAxis_exch_XNYS_us-gaap_DebtInstrumentAxis_fis_PointOnetwoFivePercentEuroSeniorNotesDueMay2021Member"
      id="d3880670e660-wk-Fact-9B611E67A5355906B89E7CBE33269E3B">FIS21C</dei:TradingSymbol>
    <dei:SecurityExchangeName
      contextRef="D2019Q4November5_dei_EntityListingsExchangeAxis_exch_XNYS_us-gaap_DebtInstrumentAxis_fis_PointOnetwoFivePercentEuroSeniorNotesDueMay2021Member"
      id="d3880670e670-wk-Fact-700169FD240F599DA7A93EF2431DEFA1">NYSE</dei:SecurityExchangeName>
    <dei:Security12bTitle
      contextRef="D2019Q4November5_dei_EntityListingsExchangeAxis_exch_XNYS_us-gaap_DebtInstrumentAxis_fis_OnePointSevenPercentGBPSeniorNotesDueJune2022Member"
      id="d3880670e676-wk-Fact-4468A20AECBC518A8F653AD723A1523C">1.700% Senior Notes due 2022</dei:Security12bTitle>
    <dei:TradingSymbol
      contextRef="D2019Q4November5_dei_EntityListingsExchangeAxis_exch_XNYS_us-gaap_DebtInstrumentAxis_fis_OnePointSevenPercentGBPSeniorNotesDueJune2022Member"
      id="d3880670e686-wk-Fact-05FEF85CC57A5EE4BD2D6CF11DCD1E07">FIS22B</dei:TradingSymbol>
    <dei:SecurityExchangeName
      contextRef="D2019Q4November5_dei_EntityListingsExchangeAxis_exch_XNYS_us-gaap_DebtInstrumentAxis_fis_OnePointSevenPercentGBPSeniorNotesDueJune2022Member"
      id="d3880670e696-wk-Fact-97E6D2E642185FAFAFBC649C7FB06EFB">NYSE</dei:SecurityExchangeName>
    <dei:Security12bTitle
      contextRef="D2019Q4November5_dei_EntityListingsExchangeAxis_exch_XNYS_us-gaap_DebtInstrumentAxis_fis_PointSevenFivePercentEuroSeniorNotesDue2023Member"
      id="d3880670e702-wk-Fact-362759A3F957501B87127434F5962E79">0.750% Senior Notes due 2023</dei:Security12bTitle>
    <dei:TradingSymbol
      contextRef="D2019Q4November5_dei_EntityListingsExchangeAxis_exch_XNYS_us-gaap_DebtInstrumentAxis_fis_PointSevenFivePercentEuroSeniorNotesDue2023Member"
      id="d3880670e712-wk-Fact-99193408C71E50CC9C46CBC4A917E47D">FIS23A</dei:TradingSymbol>
    <dei:SecurityExchangeName
      contextRef="D2019Q4November5_dei_EntityListingsExchangeAxis_exch_XNYS_us-gaap_DebtInstrumentAxis_fis_PointSevenFivePercentEuroSeniorNotesDue2023Member"
      id="d3880670e722-wk-Fact-C30E6B453340546A89B9C9072C3A9145">NYSE</dei:SecurityExchangeName>
    <dei:Security12bTitle
      contextRef="D2019Q4November5_dei_EntityListingsExchangeAxis_exch_XNYS_us-gaap_DebtInstrumentAxis_fis_OnePointOnePercentEuroSeniorNotesDueJuly2024Member"
      id="d3880670e728-wk-Fact-3D56135EFD085A56A54C94EF4E5635B8">1.100% Senior Notes due 2024</dei:Security12bTitle>
    <dei:TradingSymbol
      contextRef="D2019Q4November5_dei_EntityListingsExchangeAxis_exch_XNYS_us-gaap_DebtInstrumentAxis_fis_OnePointOnePercentEuroSeniorNotesDueJuly2024Member"
      id="d3880670e738-wk-Fact-D06D2D40E3915D50A3190140E7ED110A">FIS24A</dei:TradingSymbol>
    <dei:SecurityExchangeName
      contextRef="D2019Q4November5_dei_EntityListingsExchangeAxis_exch_XNYS_us-gaap_DebtInstrumentAxis_fis_OnePointOnePercentEuroSeniorNotesDueJuly2024Member"
      id="d3880670e748-wk-Fact-31C631329EC755C0BC0466078C53A879">NYSE</dei:SecurityExchangeName>
    <dei:Security12bTitle
      contextRef="D2019Q4November5_dei_EntityListingsExchangeAxis_exch_XNYS_us-gaap_DebtInstrumentAxis_fis_TwoPointSixZeroTwoPercentSterlingSeniorNotesDueMay2025Member"
      id="d3880670e755-wk-Fact-07A442983D9E57EE83A6F870131011B7">2.602% Senior Notes due 2025</dei:Security12bTitle>
    <dei:TradingSymbol
      contextRef="D2019Q4November5_dei_EntityListingsExchangeAxis_exch_XNYS_us-gaap_DebtInstrumentAxis_fis_TwoPointSixZeroTwoPercentSterlingSeniorNotesDueMay2025Member"
      id="d3880670e765-wk-Fact-908DCC18D81658AEAE88F0B672397FFC">FIS25A</dei:TradingSymbol>
    <dei:SecurityExchangeName
      contextRef="D2019Q4November5_dei_EntityListingsExchangeAxis_exch_XNYS_us-gaap_DebtInstrumentAxis_fis_TwoPointSixZeroTwoPercentSterlingSeniorNotesDueMay2025Member"
      id="d3880670e775-wk-Fact-C7E5ADA44A4055A7A0E3475E4585B6BC">NYSE</dei:SecurityExchangeName>
    <dei:Security12bTitle
      contextRef="D2019Q4November5_dei_EntityListingsExchangeAxis_exch_XNYS_us-gaap_DebtInstrumentAxis_fis_OnePointFivePercentEuroSeniorNotesDueMay2027Member"
      id="d3880670e781-wk-Fact-1ECA7181E2F85441A9F8C604FD211FF4">1.500% Senior Notes due 2027</dei:Security12bTitle>
    <dei:TradingSymbol
      contextRef="D2019Q4November5_dei_EntityListingsExchangeAxis_exch_XNYS_us-gaap_DebtInstrumentAxis_fis_OnePointFivePercentEuroSeniorNotesDueMay2027Member"
      id="d3880670e791-wk-Fact-91B9CBA30C915D769015345FEE908808">FIS27</dei:TradingSymbol>
    <dei:SecurityExchangeName
      contextRef="D2019Q4November5_dei_EntityListingsExchangeAxis_exch_XNYS_us-gaap_DebtInstrumentAxis_fis_OnePointFivePercentEuroSeniorNotesDueMay2027Member"
      id="d3880670e801-wk-Fact-955985793F125275982FFD3956E51BA4">NYSE</dei:SecurityExchangeName>
    <dei:Security12bTitle
      contextRef="D2019Q4November5_dei_EntityListingsExchangeAxis_exch_XNYS_us-gaap_DebtInstrumentAxis_fis_TwoPointZeroPercentEuroSeniorNotesDueMay2030Member"
      id="d3880670e807-wk-Fact-D04DDD37D8125A768665DB6B211D1919">2.000% Senior Notes due 2030</dei:Security12bTitle>
    <dei:TradingSymbol
      contextRef="D2019Q4November5_dei_EntityListingsExchangeAxis_exch_XNYS_us-gaap_DebtInstrumentAxis_fis_TwoPointZeroPercentEuroSeniorNotesDueMay2030Member"
      id="d3880670e817-wk-Fact-3B36EE609BAE5330993425584E4930D7">FIS30</dei:TradingSymbol>
    <dei:SecurityExchangeName
      contextRef="D2019Q4November5_dei_EntityListingsExchangeAxis_exch_XNYS_us-gaap_DebtInstrumentAxis_fis_TwoPointZeroPercentEuroSeniorNotesDueMay2030Member"
      id="d3880670e827-wk-Fact-35A9BE83317756EEB97497EC0784CCF6">NYSE</dei:SecurityExchangeName>
    <dei:Security12bTitle
      contextRef="D2019Q4November5_dei_EntityListingsExchangeAxis_exch_XNYS_us-gaap_DebtInstrumentAxis_fis_ThreePointThreeSixPercentSterlingSeniorNotesDueMay2031Member"
      id="d3880670e833-wk-Fact-EDD0709E3B7352548362B6F31E35DF3E">3.360% Senior Notes due 2031</dei:Security12bTitle>
    <dei:TradingSymbol
      contextRef="D2019Q4November5_dei_EntityListingsExchangeAxis_exch_XNYS_us-gaap_DebtInstrumentAxis_fis_ThreePointThreeSixPercentSterlingSeniorNotesDueMay2031Member"
      id="d3880670e843-wk-Fact-3722FC105F2F5DAAA39127E1B2CC2BEC">FIS31</dei:TradingSymbol>
    <dei:SecurityExchangeName
      contextRef="D2019Q4November5_dei_EntityListingsExchangeAxis_exch_XNYS_us-gaap_DebtInstrumentAxis_fis_ThreePointThreeSixPercentSterlingSeniorNotesDueMay2031Member"
      id="d3880670e853-wk-Fact-9441884FFB20581886B2540D889FD8AF">NYSE</dei:SecurityExchangeName>
    <dei:Security12bTitle
      contextRef="D2019Q4November5_dei_EntityListingsExchangeAxis_exch_XNYS_us-gaap_DebtInstrumentAxis_fis_TwoPointNineFivePercentEuroSeniorNotesDueMay2039Member"
      id="d3880670e859-wk-Fact-699A32959C2E5A90B79D0C5F6E36D9C9">2.950% Senior Notes due 2039</dei:Security12bTitle>
    <dei:TradingSymbol
      contextRef="D2019Q4November5_dei_EntityListingsExchangeAxis_exch_XNYS_us-gaap_DebtInstrumentAxis_fis_TwoPointNineFivePercentEuroSeniorNotesDueMay2039Member"
      id="d3880670e869-wk-Fact-B03F1E550D345D18A9315B2044DE8703">FIS39</dei:TradingSymbol>
    <dei:SecurityExchangeName
      contextRef="D2019Q4November5_dei_EntityListingsExchangeAxis_exch_XNYS_us-gaap_DebtInstrumentAxis_fis_TwoPointNineFivePercentEuroSeniorNotesDueMay2039Member"
      id="d3880670e879-wk-Fact-36F7C4044E0952DF8076ECF1657B26D3">NYSE</dei:SecurityExchangeName>
    <dei:EntityEmergingGrowthCompany
      contextRef="D2019Q4November5"
      id="d3880670e891-wk-Fact-68A4806C0DBA56389A6BFB12BF61674D">false</dei:EntityEmergingGrowthCompany>
</xbrl>
