<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.19.3</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>51</ContextCount>
  <ElementCount>159</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>true</FootnotesReported>
  <SegmentCount>38</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>2</UnitCount>
  <MyReports>
    <Report instance="teif-20190924.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>true</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>00000003 - Document - Putnam Massachusetts Tax Exempt Income Fund Summary {Unlabeled}</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://putnam.com/role/PutnamMassachusettsTaxExemptIncomeFundSummaryUnlabeled</Role>
      <ShortName>Putnam Massachusetts Tax Exempt Income Fund Summary</ShortName>
      <MenuCategory></MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="teif-20190924.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>true</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>00000004 - Document - Putnam Minnesota Tax Exempt Income Fund Summary {Unlabeled}</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://putnam.com/role/PutnamMinnesotaTaxExemptIncomeFundSummaryUnlabeled</Role>
      <ShortName>Putnam Minnesota Tax Exempt Income Fund Summary</ShortName>
      <MenuCategory></MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="teif-20190924.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>true</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>00000005 - Document - Putnam New Jersey Tax Exempt Income Fund Summary {Unlabeled}</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://putnam.com/role/PutnamNewJerseyTaxExemptIncomeFundSummaryUnlabeled</Role>
      <ShortName>Putnam New Jersey Tax Exempt Income Fund Summary</ShortName>
      <MenuCategory></MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="teif-20190924.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>true</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>00000006 - Document - Putnam Ohio Tax Exempt Income Fund Summary {Unlabeled}</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://putnam.com/role/PutnamOhioTaxExemptIncomeFundSummaryUnlabeled</Role>
      <ShortName>Putnam Ohio Tax Exempt Income Fund Summary</ShortName>
      <MenuCategory></MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="teif-20190924.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>true</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>00000007 - Document - Putnam Pennsylvania Tax Exempt Income Fund Summary {Unlabeled}</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://putnam.com/role/PutnamPennsylvaniaTaxExemptIncomeFundSummaryUnlabeled</Role>
      <ShortName>Putnam Pennsylvania Tax Exempt Income Fund Summary</ShortName>
      <MenuCategory></MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="teif-20190924.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>040000 - Disclosure - Risk/Return Detail Data {Elements}</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://xbrl.sec.gov/rr/role/RiskReturnDetailData</Role>
      <ShortName>Risk/Return Detail Data</ShortName>
      <MenuCategory></MenuCategory>
      <Position>6</Position>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <LongName>All Reports</LongName>
      <ReportType>Book</ReportType>
      <ShortName>All Reports</ShortName>
    </Report>
  </MyReports>
  <InputFiles>
    <File>teif-20190924.xml</File>
    <File>teif-20190924.xsd</File>
    <File>teif-20190924_def.xml</File>
    <File>teif-20190924_lab.xml</File>
    <File>teif-20190924_pre.xml</File>
  </InputFiles>
  <SupplementalFiles>
    <File>BarChart1.png</File>
    <File>BarChart2.png</File>
    <File>BarChart3.png</File>
    <File>BarChart4.png</File>
    <File>BarChart5.png</File>
  </SupplementalFiles>
  <BaseTaxonomies>
    <BaseTaxonomy>http://xbrl.sec.gov/dei/2018-01-31</BaseTaxonomy>
    <BaseTaxonomy>http://xbrl.sec.gov/rr/2018-01-31</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>false</HasCalculationLinkbase>
</FilingSummary>
