<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.21.4</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>23</ContextCount>
  <ElementCount>191</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>true</FootnotesReported>
  <SegmentCount>14</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>2</UnitCount>
  <MyReports>
    <Report instance="filing836.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>000000 - Document - Document and Entity Information {Elements}</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.proofPlus.com/role/DocumentInformation</Role>
      <ShortName>Document and Entity Information</ShortName>
      <MenuCategory></MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="filing836.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>000001 - Document - Risk/Return Summary {Unlabeled} - Fidelity Strategic Dividend &amp;amp; Income Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.proofPlus.com/role/SummaryS000017681_D1130FidelityStrategicDividendIncomeFundAMCIZPRO15</Role>
      <ShortName>Risk/Return Summary- Fidelity Strategic Dividend &amp;amp; Income Fund</ShortName>
      <MenuCategory></MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="filing836.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>000002 - Schedule - Shareholder Fees {- Fidelity Strategic Dividend &amp;amp; Income Fund}</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.proofPlus.com/role/ShareholderFeesS000017681_D1130FidelityStrategicDividendIncomeFundAMCIZPRO15</Role>
      <ShortName>Shareholder Fees {- Fidelity Strategic Dividend &amp;amp; Income Fund}</ShortName>
      <MenuCategory></MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="filing836.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>000003 - Schedule - Annual Operating Expenses {- Fidelity Strategic Dividend &amp;amp; Income Fund}</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.proofPlus.com/role/OperatingExpensesS000017681_D1130FidelityStrategicDividendIncomeFundAMCIZPRO15</Role>
      <ShortName>Annual Operating Expenses {- Fidelity Strategic Dividend &amp;amp; Income Fund}</ShortName>
      <MenuCategory></MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="filing836.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>000004 - Schedule - Expense Example {- Fidelity Strategic Dividend &amp;amp; Income Fund}</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.proofPlus.com/role/ExpenseExampleS000017681_D1130FidelityStrategicDividendIncomeFundAMCIZPRO15</Role>
      <ShortName>Expense Example {- Fidelity Strategic Dividend &amp;amp; Income Fund}</ShortName>
      <MenuCategory></MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="filing836.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>000005 - Schedule - Expense Example, No Redemption {- Fidelity Strategic Dividend &amp;amp; Income Fund}</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.proofPlus.com/role/ExpenseExampleNoRedemptionS000017681_D1130FidelityStrategicDividendIncomeFundAMCIZPRO15</Role>
      <ShortName>Expense Example, No Redemption {- Fidelity Strategic Dividend &amp;amp; Income Fund}</ShortName>
      <MenuCategory></MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="filing836.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>000006 - Schedule - Annual Total Returns - Fidelity Strategic Dividend &amp;amp; Income Fund [BarChart]</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.proofPlus.com/role/AnnualTotalReturnsBarChartS000017681_D1130FidelityStrategicDividendIncomeFundAMCIZPRO15</Role>
      <ShortName>Annual Total Returns - Fidelity Strategic Dividend &amp;amp; Income Fund [BarChart]</ShortName>
      <MenuCategory></MenuCategory>
      <Position>7</Position>
    </Report>
    <Report instance="filing836.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>000007 - Schedule - Average Annual Total Returns {Transposed} {- Fidelity Strategic Dividend &amp;amp; Income Fund}</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.proofPlus.com/role/AverageAnnualTotalReturnsS000017681_D1130FidelityStrategicDividendIncomeFundAMCIZPRO15</Role>
      <ShortName>Average Annual Total Returns{- Fidelity Strategic Dividend &amp;amp; Income Fund}</ShortName>
      <MenuCategory></MenuCategory>
      <Position>8</Position>
    </Report>
    <Report instance="filing836.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>000009 - Disclosure - Risk/Return Detail Data {Elements} - Fidelity Strategic Dividend &amp;amp; Income Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.proofPlus.com/role/DisclosureDetailS000017681_D1130FidelityStrategicDividendIncomeFundAMCIZPRO15</Role>
      <ShortName>Risk/Return Detail Data- Fidelity Strategic Dividend &amp;amp; Income Fund</ShortName>
      <MenuCategory></MenuCategory>
      <Position>9</Position>
    </Report>
    <Report instance="filing836.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>000010 - Document - Risk/Return Summary {Unlabeled} - Fidelity Strategic Dividend &amp;amp; Income Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.proofPlus.com/role/SummaryS000017681_D1130FidelityStrategicDividendIncomeFundRetailPRO11</Role>
      <ShortName>Risk/Return Summary- Fidelity Strategic Dividend &amp;amp; Income Fund</ShortName>
      <MenuCategory></MenuCategory>
      <Position>10</Position>
    </Report>
    <Report instance="filing836.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>000011 - Schedule - Shareholder Fees {- Fidelity Strategic Dividend &amp;amp; Income Fund}</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.proofPlus.com/role/ShareholderFeesS000017681_D1130FidelityStrategicDividendIncomeFundRetailPRO11</Role>
      <ShortName>Shareholder Fees {- Fidelity Strategic Dividend &amp;amp; Income Fund}</ShortName>
      <MenuCategory></MenuCategory>
      <Position>11</Position>
    </Report>
    <Report instance="filing836.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>000012 - Schedule - Annual Operating Expenses {- Fidelity Strategic Dividend &amp;amp; Income Fund}</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.proofPlus.com/role/OperatingExpensesS000017681_D1130FidelityStrategicDividendIncomeFundRetailPRO11</Role>
      <ShortName>Annual Operating Expenses {- Fidelity Strategic Dividend &amp;amp; Income Fund}</ShortName>
      <MenuCategory></MenuCategory>
      <Position>12</Position>
    </Report>
    <Report instance="filing836.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>000013 - Schedule - Expense Example {- Fidelity Strategic Dividend &amp;amp; Income Fund}</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.proofPlus.com/role/ExpenseExampleS000017681_D1130FidelityStrategicDividendIncomeFundRetailPRO11</Role>
      <ShortName>Expense Example {- Fidelity Strategic Dividend &amp;amp; Income Fund}</ShortName>
      <MenuCategory></MenuCategory>
      <Position>13</Position>
    </Report>
    <Report instance="filing836.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>000015 - Schedule - Annual Total Returns - Fidelity Strategic Dividend &amp;amp; Income Fund [BarChart]</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.proofPlus.com/role/AnnualTotalReturnsBarChartS000017681_D1130FidelityStrategicDividendIncomeFundRetailPRO11</Role>
      <ShortName>Annual Total Returns - Fidelity Strategic Dividend &amp;amp; Income Fund [BarChart]</ShortName>
      <MenuCategory></MenuCategory>
      <Position>14</Position>
    </Report>
    <Report instance="filing836.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>000016 - Schedule - Average Annual Total Returns {Transposed} {- Fidelity Strategic Dividend &amp;amp; Income Fund}</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.proofPlus.com/role/AverageAnnualTotalReturnsS000017681_D1130FidelityStrategicDividendIncomeFundRetailPRO11</Role>
      <ShortName>Average Annual Total Returns{- Fidelity Strategic Dividend &amp;amp; Income Fund}</ShortName>
      <MenuCategory></MenuCategory>
      <Position>15</Position>
    </Report>
    <Report instance="filing836.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>000018 - Disclosure - Risk/Return Detail Data {Elements} - Fidelity Strategic Dividend &amp;amp; Income Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.proofPlus.com/role/DisclosureDetailS000017681_D1130FidelityStrategicDividendIncomeFundRetailPRO11</Role>
      <ShortName>Risk/Return Detail Data- Fidelity Strategic Dividend &amp;amp; Income Fund</ShortName>
      <MenuCategory></MenuCategory>
      <Position>16</Position>
    </Report>
    <Report instance="filing836.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.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>17</Position>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <LongName>All Reports</LongName>
      <ReportType>Book</ReportType>
      <ShortName>All Reports</ShortName>
    </Report>
  </MyReports>
  <InputFiles>
    <File doctype="485BPOS" original="filing836.htm">filing836.htm</File>
    <File>d115.htm</File>
    <File>d123.htm</File>
    <File>d131.htm</File>
    <File>exi.htm</File>
    <File>exj.htm</File>
    <File>wpl-20220129.xsd</File>
    <File>wpl-20220129_cal.xml</File>
    <File>wpl-20220129_def.xml</File>
    <File>wpl-20220129_lab.xml</File>
    <File>wpl-20220129_pre.xml</File>
  </InputFiles>
  <SupplementalFiles>
    <File>fi_logo.jpg</File>
    <File>fipro_logo.jpg</File>
    <File>img769231758.jpg</File>
    <File>img769234801.jpg</File>
  </SupplementalFiles>
  <BaseTaxonomies>
    <BaseTaxonomy>http://xbrl.sec.gov/dei/2020-01-31</BaseTaxonomy>
    <BaseTaxonomy>http://xbrl.sec.gov/rr/2018-01-31</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
