<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.25.1</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>29</ContextCount>
  <ElementCount>32</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>false</FootnotesReported>
  <SegmentCount>18</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>4</UnitCount>
  <MyReports>
    <Report instance="fls013554-def14a.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>00000001 - Document - Cover</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://flowserve.com/role/Cover</Role>
      <ShortName>Cover</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="fls013554-def14a.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>995410 - Disclosure - Pay vs Performance Disclosure</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://xbrl.sec.gov/ecd/role/PvpDisclosure</Role>
      <ShortName>Pay vs Performance Disclosure</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="fls013554-def14a.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>995443 - Disclosure - Award Timing Disclosure</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://xbrl.sec.gov/ecd/role/AwardTimingDisclosure</Role>
      <ShortName>Award Timing Disclosure</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="fls013554-def14a.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>995447 - Disclosure - Insider Trading Policies and Procedures</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://xbrl.sec.gov/ecd/role/InsiderTradingPoliciesProc</Role>
      <ShortName>Insider Trading Policies and Procedures</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>4</Position>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <LongName>All Reports</LongName>
      <ReportType>Book</ReportType>
      <ShortName>All Reports</ShortName>
    </Report>
  </MyReports>
  <InputFiles>
    <File>fls-20250516.xsd</File>
    <File>fls-20250516_def.xml</File>
    <File>fls-20250516_lab.xml</File>
    <File>fls-20250516_pre.xml</File>
    <File doctype="DEF 14A" isProxy="true" isUsgaap="true" original="fls013554-def14a.htm">fls013554-def14a.htm</File>
  </InputFiles>
  <SupplementalFiles>
    <File>footer.jpg</File>
    <File>pro013554-def14ax12x1.jpg</File>
    <File>pro013554-def14ax13x1.jpg</File>
    <File>pro013554-def14ax13x2.jpg</File>
    <File>pro013554-def14ax14x1.jpg</File>
    <File>pro013554-def14ax15x1.jpg</File>
    <File>pro013554-def14ax16x1.jpg</File>
    <File>pro013554-def14ax17x1.jpg</File>
    <File>pro013554-def14ax18x1.jpg</File>
    <File>pro013554-def14ax19x1.jpg</File>
    <File>pro013554-def14ax1x1a.jpg</File>
    <File>pro013554-def14ax20x1.jpg</File>
    <File>pro013554-def14ax20x10.jpg</File>
    <File>pro013554-def14ax20x11.jpg</File>
    <File>pro013554-def14ax20x12.jpg</File>
    <File>pro013554-def14ax20x2.jpg</File>
    <File>pro013554-def14ax20x3.jpg</File>
    <File>pro013554-def14ax20x4.jpg</File>
    <File>pro013554-def14ax20x5.jpg</File>
    <File>pro013554-def14ax20x6.jpg</File>
    <File>pro013554-def14ax20x7.jpg</File>
    <File>pro013554-def14ax20x8.jpg</File>
    <File>pro013554-def14ax20x9.jpg</File>
    <File>pro013554-def14ax21x1.jpg</File>
    <File>pro013554-def14ax21x2.jpg</File>
    <File>pro013554-def14ax22x1.jpg</File>
    <File>pro013554-def14ax22x2.jpg</File>
    <File>pro013554-def14ax22x3.jpg</File>
    <File>pro013554-def14ax22x4.jpg</File>
    <File>pro013554-def14ax23x1.jpg</File>
    <File>pro013554-def14ax23x2.jpg</File>
    <File>pro013554-def14ax23x3.jpg</File>
    <File>pro013554-def14ax23x4.jpg</File>
    <File>pro013554-def14ax24x1.jpg</File>
    <File>pro013554-def14ax24x2.jpg</File>
    <File>pro013554-def14ax24x3.jpg</File>
    <File>pro013554-def14ax24x4.jpg</File>
    <File>pro013554-def14ax25x1.jpg</File>
    <File>pro013554-def14ax25x2.jpg</File>
    <File>pro013554-def14ax25x3.jpg</File>
    <File>pro013554-def14ax25x4.jpg</File>
    <File>pro013554-def14ax26x1.jpg</File>
    <File>pro013554-def14ax26x2.jpg</File>
    <File>pro013554-def14ax27x1.jpg</File>
    <File>pro013554-def14ax36x1.jpg</File>
    <File>pro013554-def14ax36x2.jpg</File>
    <File>pro013554-def14ax36x3.jpg</File>
    <File>pro013554-def14ax36x4.jpg</File>
    <File>pro013554-def14ax37x1.jpg</File>
    <File>pro013554-def14ax37x2.jpg</File>
    <File>pro013554-def14ax37x3.jpg</File>
    <File>pro013554-def14ax38x1.jpg</File>
    <File>pro013554-def14ax38x2.jpg</File>
    <File>pro013554-def14ax38x3.jpg</File>
    <File>pro013554-def14ax38x4.jpg</File>
    <File>pro013554-def14ax38x5.jpg</File>
    <File>pro013554-def14ax3x1.jpg</File>
    <File>pro013554-def14ax3x2.jpg</File>
    <File>pro013554-def14ax3x3.jpg</File>
    <File>pro013554-def14ax3x4.jpg</File>
    <File>pro013554-def14ax3x5.jpg</File>
    <File>pro013554-def14ax3x6.jpg</File>
    <File>pro013554-def14ax3x7.jpg</File>
    <File>pro013554-def14ax3x8.jpg</File>
    <File>pro013554-def14ax40x1.jpg</File>
    <File>pro013554-def14ax41x5.jpg</File>
    <File>pro013554-def14ax41x6.jpg</File>
    <File>pro013554-def14ax41x7.jpg</File>
    <File>pro013554-def14ax41x8.jpg</File>
    <File>pro013554-def14ax42x1.jpg</File>
    <File>pro013554-def14ax42x2.jpg</File>
    <File>pro013554-def14ax42x3.jpg</File>
    <File>pro013554-def14ax42x4.jpg</File>
    <File>pro013554-def14ax42x5.jpg</File>
    <File>pro013554-def14ax42x6.jpg</File>
    <File>pro013554-def14ax42x7.jpg</File>
    <File>pro013554-def14ax42x8.jpg</File>
    <File>pro013554-def14ax42x9.jpg</File>
    <File>pro013554-def14ax44x1.jpg</File>
    <File>pro013554-def14ax44x2.jpg</File>
    <File>pro013554-def14ax46x1.jpg</File>
    <File>pro013554-def14ax47x1.jpg</File>
    <File>pro013554-def14ax47x2.jpg</File>
    <File>pro013554-def14ax47x3.jpg</File>
    <File>pro013554-def14ax48x1.jpg</File>
    <File>pro013554-def14ax48x2.jpg</File>
    <File>pro013554-def14ax48x3.jpg</File>
    <File>pro013554-def14ax48x4.jpg</File>
    <File>pro013554-def14ax48x5.jpg</File>
    <File>pro013554-def14ax48x6.jpg</File>
    <File>pro013554-def14ax50x1.jpg</File>
    <File>pro013554-def14ax5x1.jpg</File>
    <File>pro013554-def14ax5x2.jpg</File>
    <File>pro013554-def14ax5x3.jpg</File>
    <File>pro013554-def14ax5x4.jpg</File>
    <File>pro013554-def14ax5x5.jpg</File>
    <File>pro013554-def14ax5x6.jpg</File>
    <File>pro013554-def14ax5x7.jpg</File>
    <File>pro013554-def14ax5x8.jpg</File>
    <File>pro013554-def14ax5x9.jpg</File>
    <File>pro013554-def14ax6x1.jpg</File>
    <File>pro013554-def14ax6x10.jpg</File>
    <File>pro013554-def14ax6x11.jpg</File>
    <File>pro013554-def14ax6x12.jpg</File>
    <File>pro013554-def14ax6x13.jpg</File>
    <File>pro013554-def14ax6x14.jpg</File>
    <File>pro013554-def14ax6x15.jpg</File>
    <File>pro013554-def14ax6x16.jpg</File>
    <File>pro013554-def14ax6x17.jpg</File>
    <File>pro013554-def14ax6x18.jpg</File>
    <File>pro013554-def14ax6x19.jpg</File>
    <File>pro013554-def14ax6x2.jpg</File>
    <File>pro013554-def14ax6x20.jpg</File>
    <File>pro013554-def14ax6x21.jpg</File>
    <File>pro013554-def14ax6x22.jpg</File>
    <File>pro013554-def14ax6x23.jpg</File>
    <File>pro013554-def14ax6x24.jpg</File>
    <File>pro013554-def14ax6x25.jpg</File>
    <File>pro013554-def14ax6x26.jpg</File>
    <File>pro013554-def14ax6x27.jpg</File>
    <File>pro013554-def14ax6x3.jpg</File>
    <File>pro013554-def14ax6x4.jpg</File>
    <File>pro013554-def14ax6x5.jpg</File>
    <File>pro013554-def14ax6x6.jpg</File>
    <File>pro013554-def14ax6x7.jpg</File>
    <File>pro013554-def14ax6x8.jpg</File>
    <File>pro013554-def14ax6x9.jpg</File>
    <File>pro013554-def14ax70x1.jpg</File>
    <File>pro013554-def14ax71x1.jpg</File>
    <File>pro013554-def14ax71x2.jpg</File>
    <File>pro013554-def14ax73x1.jpg</File>
    <File>pro013554-def14ax78x1.jpg</File>
    <File>pro013554-def14ax7x1.jpg</File>
    <File>pro013554-def14ax7x2.jpg</File>
    <File>pro013554-def14ax7x3.jpg</File>
    <File>pro013554-def14ax7x4.jpg</File>
    <File>pro013554-def14ax7x5.jpg</File>
    <File>pro013554-def14ax7x6.jpg</File>
    <File>pro013554-def14ax7x7.jpg</File>
    <File>pro013554-def14ax81x1.jpg</File>
    <File>pro013554-def14ax83x1.jpg</File>
    <File>pro013554-def14ax8x1.jpg</File>
    <File>pro013554-def14ax8x2.jpg</File>
    <File>pro013554-def14ax8x3.jpg</File>
    <File>pro013554-def14ax8x4.jpg</File>
    <File>pro013554-def14ax8x5.jpg</File>
    <File>pro013554-def14ax8x6.jpg</File>
    <File>pro013554-def14ax96x1.jpg</File>
    <File>pro013554-def14ax9x1.jpg</File>
    <File>pro013554-def14ax9x2.jpg</File>
    <File>pro013554-def14ax9x3.jpg</File>
    <File>pro013554-def14ax9x4.jpg</File>
    <File>pro013554-def14ax9x5.jpg</File>
    <File>pro013554-def14ax9x6.jpg</File>
    <File>proxy_1.jpg</File>
    <File>proxy_2.jpg</File>
  </SupplementalFiles>
  <BaseTaxonomies>
    <BaseTaxonomy items="5">http://fasb.org/us-gaap/2024</BaseTaxonomy>
    <BaseTaxonomy items="4">http://xbrl.sec.gov/dei/2024</BaseTaxonomy>
    <BaseTaxonomy items="78">http://xbrl.sec.gov/ecd/2024</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>false</HasCalculationLinkbase>
</FilingSummary>
