<?xml version="1.0" encoding="utf-8"?>
<xbrl
  xmlns="http://www.xbrl.org/2003/instance"
  xmlns:dei="http://xbrl.sec.gov/dei/2025"
  xmlns:ffd="http://xbrl.sec.gov/ffd/2025q4"
  xmlns:iso4217="http://www.xbrl.org/2003/iso4217"
  xmlns:link="http://www.xbrl.org/2003/linkbase"
  xmlns:xbrldi="http://xbrl.org/2006/xbrldi"
  xmlns:xlink="http://www.w3.org/1999/xlink"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
    <link:schemaRef
      xlink:href="https://xbrl.sec.gov/ffd/2025q4/ffd-2025q4.xsd"
      xlink:type="simple"/>
    <context id="rc">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001136893</identifier>
        </entity>
        <period>
            <startDate>2026-03-06</startDate>
            <endDate>2026-03-06</endDate>
        </period>
    </context>
    <context id="offrl_1">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001136893</identifier>
            <segment>
                <xbrldi:typedMember dimension="ffd:OfferingAxis">
                    <dei:lineNo>1</dei:lineNo>
                </xbrldi:typedMember>
            </segment>
        </entity>
        <period>
            <startDate>2026-03-06</startDate>
            <endDate>2026-03-06</endDate>
        </period>
    </context>
    <context id="offrl_2">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001136893</identifier>
            <segment>
                <xbrldi:typedMember dimension="ffd:OfferingAxis">
                    <dei:lineNo>2</dei:lineNo>
                </xbrldi:typedMember>
            </segment>
        </entity>
        <period>
            <startDate>2026-03-06</startDate>
            <endDate>2026-03-06</endDate>
        </period>
    </context>
    <unit id="USD">
        <measure>iso4217:USD</measure>
    </unit>
    <unit id="pure">
        <measure>pure</measure>
    </unit>
    <unit id="Shares">
        <measure>shares</measure>
    </unit>
    <ffd:FormTp contextRef="rc" id="ixv-371">S-3</ffd:FormTp>
    <ffd:SubmissnTp contextRef="rc" id="ixv-372">424B5</ffd:SubmissnTp>
    <ffd:FeeExhibitTp contextRef="rc" id="ixv-373">EX-FILING FEES</ffd:FeeExhibitTp>
    <ffd:RegnFileNb contextRef="rc" id="ixv-374">333-288198</ffd:RegnFileNb>
    <dei:EntityCentralIndexKey contextRef="rc" id="ixv-375">0001136893</dei:EntityCentralIndexKey>
    <dei:EntityRegistrantName contextRef="rc" id="ixv-376">Fidelity National Information Services, Inc.</dei:EntityRegistrantName>
    <ffd:OfferingTableNa contextRef="rc" id="hiddenrcOfferingTableNa" xsi:nil="true"/>
    <ffd:OffsetTableNa contextRef="rc" id="hiddenrcOffsetTableNa">N/A</ffd:OffsetTableNa>
    <ffd:CombinedProspectusTableNa contextRef="rc" id="hiddenrcCombinedProspectusTableNa">N/A</ffd:CombinedProspectusTableNa>
    <ffd:FormTp contextRef="rc" id="ixv-413">S-3</ffd:FormTp>
    <dei:EntityRegistrantName contextRef="rc" id="ixv-414">Fidelity National Information Services, Inc.</dei:EntityRegistrantName>
    <ffd:PrevslyPdFlg contextRef="offrl_1" id="ixv-415">false</ffd:PrevslyPdFlg>
    <ffd:OfferingSctyTp contextRef="offrl_1" id="ixv-416">Debt</ffd:OfferingSctyTp>
    <ffd:OfferingSctyTitl contextRef="offrl_1" id="ixv-417">Floating Rate Senior Notes due 2028</ffd:OfferingSctyTitl>
    <ffd:Rule457rFlg contextRef="offrl_1" id="ixv-418">true</ffd:Rule457rFlg>
    <ffd:AmtSctiesRegd
      contextRef="offrl_1"
      decimals="0"
      id="ixv-419"
      unitRef="Shares">581700000</ffd:AmtSctiesRegd>
    <ffd:MaxOfferingPricPerScty
      contextRef="offrl_1"
      decimals="2"
      id="ixv-420"
      unitRef="USD">1.00</ffd:MaxOfferingPricPerScty>
    <ffd:MaxAggtOfferingPric
      contextRef="offrl_1"
      decimals="2"
      id="ixv-421"
      unitRef="USD">581700000.00</ffd:MaxAggtOfferingPric>
    <ffd:FeeRate
      contextRef="offrl_1"
      decimals="7"
      id="ixv-422"
      unitRef="pure">0.0001381</ffd:FeeRate>
    <ffd:FeeAmt
      contextRef="offrl_1"
      decimals="2"
      id="ixv-423"
      unitRef="USD">80332.77</ffd:FeeAmt>
    <ffd:PrevslyPdFlg contextRef="offrl_2" id="ixv-424">false</ffd:PrevslyPdFlg>
    <ffd:OfferingSctyTp contextRef="offrl_2" id="ixv-425">Debt</ffd:OfferingSctyTp>
    <ffd:OfferingSctyTitl contextRef="offrl_2" id="ixv-426">3.450% Senior Notes due 2030</ffd:OfferingSctyTitl>
    <ffd:Rule457rFlg contextRef="offrl_2" id="ixv-427">true</ffd:Rule457rFlg>
    <ffd:AmtSctiesRegd
      contextRef="offrl_2"
      decimals="0"
      id="ixv-428"
      unitRef="Shares">581700000</ffd:AmtSctiesRegd>
    <ffd:MaxOfferingPricPerScty
      contextRef="offrl_2"
      decimals="5"
      id="ixv-429"
      unitRef="USD">0.99978</ffd:MaxOfferingPricPerScty>
    <ffd:MaxAggtOfferingPric
      contextRef="offrl_2"
      decimals="2"
      id="ixv-430"
      unitRef="USD">581572026.00</ffd:MaxAggtOfferingPric>
    <ffd:FeeRate
      contextRef="offrl_2"
      decimals="7"
      id="ixv-431"
      unitRef="pure">0.0001381</ffd:FeeRate>
    <ffd:FeeAmt
      contextRef="offrl_2"
      decimals="2"
      id="ixv-432"
      unitRef="USD">80315.10</ffd:FeeAmt>
    <ffd:TtlOfferingAmt contextRef="rc" decimals="2" id="ixv-433" unitRef="USD">1163272026.00</ffd:TtlOfferingAmt>
    <ffd:TtlFeeAmt contextRef="rc" decimals="2" id="ixv-434" unitRef="USD">160647.87</ffd:TtlFeeAmt>
    <ffd:TtlPrevslyPdAmt contextRef="rc" decimals="2" id="ixv-435" unitRef="USD">0.00</ffd:TtlPrevslyPdAmt>
    <ffd:TtlOffsetAmt contextRef="rc" decimals="2" id="ixv-436" unitRef="USD">0.00</ffd:TtlOffsetAmt>
    <ffd:NetFeeAmt contextRef="rc" decimals="2" id="ixv-437" unitRef="USD">160647.87</ffd:NetFeeAmt>
    <ffd:OfferingNote contextRef="offrl_1" id="ixv-438">Note 1.a. The filing fee is calculated in accordance with Rules 457(o) and 457(r) of the Securities Act of 1933, as amended (the "Act"). In accordance with Rules 456(b) and 457(r) of the Act, the registrant initially deferred payment of all of the registration fee for Registration Statement No. 333-288198 filed on June 20, 2025, as amended by the Post-Effective Amendment No. 1, filed on February 26, 2026. Note 1.b. EUR500,000,000 aggregate principal amount of the Floating Rate Senior Notes due 2028 will be issued. The $581,700,000.00 Amount to be Registered is based on the March 4, 2026 EUR/USD exchange rate of EUR1.00/U.S. $1.1634.</ffd:OfferingNote>
    <ffd:OfferingNote contextRef="offrl_2" id="ixv-439">See Offering Note 1.a. Note 2.b. EUR500,000,000 aggregate principal amount of the 3.450% Senior Notes due 2030 will be issued. The $581,700,000.00 Amount to be Registered is based on the March 4, 2026 EUR/USD exchange rate of EUR1.00/U.S. $1.1634.</ffd:OfferingNote>
    <ffd:NrrtvMaxAggtOfferingPric contextRef="rc" decimals="2" id="ixv-440" unitRef="USD">1163272026.00</ffd:NrrtvMaxAggtOfferingPric>
    <ffd:FnlPrspctsFlg contextRef="rc" id="ixv-441">true</ffd:FnlPrspctsFlg>
</xbrl>
