<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.19.1</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>124</ContextCount>
  <ElementCount>82</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>true</FootnotesReported>
  <SegmentCount>73</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>2</UnitCount>
  <MyReports>
    <Report instance="afiv1-20190228.xml">
      <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.amgfunds.com/role/DocumentDocumentandEntityInformationElements</Role>
      <ShortName>Document and Entity Information</ShortName>
      <MenuCategory></MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="afiv1-20190228.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>true</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>000011 - Document - Risk/Return Summary {Unlabeled} - AMG GW&amp;K U.S. Small Cap Growth Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.amgfunds.com/role/DocumentRiskReturnSummaryUnlabeledAMGGWKU.S.SmallCapGrowthFund</Role>
      <ShortName>Risk/Return Summary- AMG GW&amp;K U.S. Small Cap Growth Fund</ShortName>
      <MenuCategory></MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="afiv1-20190228.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>000019 - Disclosure - Risk/Return Detail Data {Elements} - AMG GW&amp;K U.S. Small Cap Growth Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.amgfunds.com/role/DisclosureRiskReturnDetailDataElementsAMGGWKU.S.SmallCapGrowthFund</Role>
      <ShortName>Risk/Return Detail Data- AMG GW&amp;K U.S. Small Cap Growth Fund</ShortName>
      <MenuCategory></MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="afiv1-20190228.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>true</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>000021 - Document - Risk/Return Summary {Unlabeled} - AMG Managers DoubleLine Core Plus Bond Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.amgfunds.com/role/DocumentRiskReturnSummaryUnlabeledAMGManagersDoubleLineCorePlusBondFund</Role>
      <ShortName>Risk/Return Summary- AMG Managers DoubleLine Core Plus Bond Fund</ShortName>
      <MenuCategory></MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="afiv1-20190228.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>000029 - Disclosure - Risk/Return Detail Data {Elements} - AMG Managers DoubleLine Core Plus Bond Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.amgfunds.com/role/DisclosureRiskReturnDetailDataElementsAMGManagersDoubleLineCorePlusBondFund</Role>
      <ShortName>Risk/Return Detail Data- AMG Managers DoubleLine Core Plus Bond Fund</ShortName>
      <MenuCategory></MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="afiv1-20190228.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>true</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>000031 - Document - Risk/Return Summary {Unlabeled} - AMG Managers Fairpointe ESG Equity Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.amgfunds.com/role/DocumentRiskReturnSummaryUnlabeledAMGManagersFairpointeESGEquityFund</Role>
      <ShortName>Risk/Return Summary- AMG Managers Fairpointe ESG Equity Fund</ShortName>
      <MenuCategory></MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="afiv1-20190228.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>000039 - Disclosure - Risk/Return Detail Data {Elements} - AMG Managers Fairpointe ESG Equity Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.amgfunds.com/role/DisclosureRiskReturnDetailDataElementsAMGManagersFairpointeESGEquityFund</Role>
      <ShortName>Risk/Return Detail Data- AMG Managers Fairpointe ESG Equity Fund</ShortName>
      <MenuCategory></MenuCategory>
      <Position>7</Position>
    </Report>
    <Report instance="afiv1-20190228.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>true</HasEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>000041 - Document - Risk/Return Summary {Unlabeled} - AMG Managers Fairpointe Mid Cap Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.amgfunds.com/role/DocumentRiskReturnSummaryUnlabeledAMGManagersFairpointeMidCapFund</Role>
      <ShortName>Risk/Return Summary- AMG Managers Fairpointe Mid Cap Fund</ShortName>
      <MenuCategory></MenuCategory>
      <Position>8</Position>
    </Report>
    <Report instance="afiv1-20190228.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>000049 - Disclosure - Risk/Return Detail Data {Elements} - AMG Managers Fairpointe Mid Cap Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.amgfunds.com/role/DisclosureRiskReturnDetailDataElementsAMGManagersFairpointeMidCapFund</Role>
      <ShortName>Risk/Return Detail Data- AMG Managers Fairpointe Mid Cap Fund</ShortName>
      <MenuCategory></MenuCategory>
      <Position>9</Position>
    </Report>
    <Report instance="afiv1-20190228.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>true</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>000051 - Document - Risk/Return Summary {Unlabeled} - AMG Managers LMCG Small Cap Growth Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.amgfunds.com/role/DocumentRiskReturnSummaryUnlabeledAMGManagersLMCGSmallCapGrowthFund</Role>
      <ShortName>Risk/Return Summary- AMG Managers LMCG Small Cap Growth Fund</ShortName>
      <MenuCategory></MenuCategory>
      <Position>10</Position>
    </Report>
    <Report instance="afiv1-20190228.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R31.htm</HtmlFileName>
      <LongName>000059 - Disclosure - Risk/Return Detail Data {Elements} - AMG Managers LMCG Small Cap Growth Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.amgfunds.com/role/DisclosureRiskReturnDetailDataElementsAMGManagersLMCGSmallCapGrowthFund</Role>
      <ShortName>Risk/Return Detail Data- AMG Managers LMCG Small Cap Growth Fund</ShortName>
      <MenuCategory></MenuCategory>
      <Position>11</Position>
    </Report>
    <Report instance="afiv1-20190228.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>true</HasEmbeddedReports>
      <HtmlFileName>R32.htm</HtmlFileName>
      <LongName>000061 - Document - Risk/Return Summary {Unlabeled} - AMG Managers Montag &amp; Caldwell Growth Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.amgfunds.com/role/DocumentRiskReturnSummaryUnlabeledAMGManagersMontagCaldwellGrowthFund</Role>
      <ShortName>Risk/Return Summary- AMG Managers Montag &amp; Caldwell Growth Fund</ShortName>
      <MenuCategory></MenuCategory>
      <Position>12</Position>
    </Report>
    <Report instance="afiv1-20190228.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R37.htm</HtmlFileName>
      <LongName>000069 - Disclosure - Risk/Return Detail Data {Elements} - AMG Managers Montag &amp; Caldwell Growth Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.amgfunds.com/role/DisclosureRiskReturnDetailDataElementsAMGManagersMontagCaldwellGrowthFund</Role>
      <ShortName>Risk/Return Detail Data- AMG Managers Montag &amp; Caldwell Growth Fund</ShortName>
      <MenuCategory></MenuCategory>
      <Position>13</Position>
    </Report>
    <Report instance="afiv1-20190228.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>true</HasEmbeddedReports>
      <HtmlFileName>R38.htm</HtmlFileName>
      <LongName>000071 - Document - Risk/Return Summary {Unlabeled} - AMG Managers Pictet International Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.amgfunds.com/role/DocumentRiskReturnSummaryUnlabeledAMGManagersPictetInternationalFund</Role>
      <ShortName>Risk/Return Summary- AMG Managers Pictet International Fund</ShortName>
      <MenuCategory></MenuCategory>
      <Position>14</Position>
    </Report>
    <Report instance="afiv1-20190228.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R43.htm</HtmlFileName>
      <LongName>000079 - Disclosure - Risk/Return Detail Data {Elements} - AMG Managers Pictet International Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.amgfunds.com/role/DisclosureRiskReturnDetailDataElementsAMGManagersPictetInternationalFund</Role>
      <ShortName>Risk/Return Detail Data- AMG Managers Pictet International Fund</ShortName>
      <MenuCategory></MenuCategory>
      <Position>15</Position>
    </Report>
    <Report instance="afiv1-20190228.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>true</HasEmbeddedReports>
      <HtmlFileName>R44.htm</HtmlFileName>
      <LongName>000081 - Document - Risk/Return Summary {Unlabeled} - AMG Managers Silvercrest Small Cap Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.amgfunds.com/role/DocumentRiskReturnSummaryUnlabeledAMGManagersSilvercrestSmallCapFund</Role>
      <ShortName>Risk/Return Summary- AMG Managers Silvercrest Small Cap Fund</ShortName>
      <MenuCategory></MenuCategory>
      <Position>16</Position>
    </Report>
    <Report instance="afiv1-20190228.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R49.htm</HtmlFileName>
      <LongName>000089 - Disclosure - Risk/Return Detail Data {Elements} - AMG Managers Silvercrest Small Cap Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.amgfunds.com/role/DisclosureRiskReturnDetailDataElementsAMGManagersSilvercrestSmallCapFund</Role>
      <ShortName>Risk/Return Detail Data- AMG Managers Silvercrest Small Cap Fund</ShortName>
      <MenuCategory></MenuCategory>
      <Position>17</Position>
    </Report>
    <Report instance="afiv1-20190228.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>true</HasEmbeddedReports>
      <HtmlFileName>R50.htm</HtmlFileName>
      <LongName>000091 - Document - Risk/Return Summary {Unlabeled} - AMG Managers Value Partners Asia Dividend Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.amgfunds.com/role/DocumentRiskReturnSummaryUnlabeledAMGManagersValuePartnersAsiaDividendFund</Role>
      <ShortName>Risk/Return Summary- AMG Managers Value Partners Asia Dividend Fund</ShortName>
      <MenuCategory></MenuCategory>
      <Position>18</Position>
    </Report>
    <Report instance="afiv1-20190228.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R55.htm</HtmlFileName>
      <LongName>000099 - Disclosure - Risk/Return Detail Data {Elements} - AMG Managers Value Partners Asia Dividend Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.amgfunds.com/role/DisclosureRiskReturnDetailDataElementsAMGManagersValuePartnersAsiaDividendFund</Role>
      <ShortName>Risk/Return Detail Data- AMG Managers Value Partners Asia Dividend Fund</ShortName>
      <MenuCategory></MenuCategory>
      <Position>19</Position>
    </Report>
    <Report instance="afiv1-20190228.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>true</HasEmbeddedReports>
      <HtmlFileName>R56.htm</HtmlFileName>
      <LongName>000101 - Document - Risk/Return Summary {Unlabeled} - AMG River Road Dividend All Cap Value Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.amgfunds.com/role/DocumentRiskReturnSummaryUnlabeledAMGRiverRoadDividendAllCapValueFund</Role>
      <ShortName>Risk/Return Summary- AMG River Road Dividend All Cap Value Fund</ShortName>
      <MenuCategory></MenuCategory>
      <Position>20</Position>
    </Report>
    <Report instance="afiv1-20190228.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R61.htm</HtmlFileName>
      <LongName>000109 - Disclosure - Risk/Return Detail Data {Elements} - AMG River Road Dividend All Cap Value Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.amgfunds.com/role/DisclosureRiskReturnDetailDataElementsAMGRiverRoadDividendAllCapValueFund</Role>
      <ShortName>Risk/Return Detail Data- AMG River Road Dividend All Cap Value Fund</ShortName>
      <MenuCategory></MenuCategory>
      <Position>21</Position>
    </Report>
    <Report instance="afiv1-20190228.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>true</HasEmbeddedReports>
      <HtmlFileName>R62.htm</HtmlFileName>
      <LongName>000111 - Document - Risk/Return Summary {Unlabeled} - AMG River Road Dividend All Cap Value Fund II</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.amgfunds.com/role/DocumentRiskReturnSummaryUnlabeledAMGRiverRoadDividendAllCapValueFundII</Role>
      <ShortName>Risk/Return Summary- AMG River Road Dividend All Cap Value Fund II</ShortName>
      <MenuCategory></MenuCategory>
      <Position>22</Position>
    </Report>
    <Report instance="afiv1-20190228.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R67.htm</HtmlFileName>
      <LongName>000119 - Disclosure - Risk/Return Detail Data {Elements} - AMG River Road Dividend All Cap Value Fund II</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.amgfunds.com/role/DisclosureRiskReturnDetailDataElementsAMGRiverRoadDividendAllCapValueFundII</Role>
      <ShortName>Risk/Return Detail Data- AMG River Road Dividend All Cap Value Fund II</ShortName>
      <MenuCategory></MenuCategory>
      <Position>23</Position>
    </Report>
    <Report instance="afiv1-20190228.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>true</HasEmbeddedReports>
      <HtmlFileName>R68.htm</HtmlFileName>
      <LongName>000121 - Document - Risk/Return Summary {Unlabeled} - AMG River Road Focused Absolute Value Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.amgfunds.com/role/DocumentRiskReturnSummaryUnlabeledAMGRiverRoadFocusedAbsoluteValueFund</Role>
      <ShortName>Risk/Return Summary- AMG River Road Focused Absolute Value Fund</ShortName>
      <MenuCategory></MenuCategory>
      <Position>24</Position>
    </Report>
    <Report instance="afiv1-20190228.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R73.htm</HtmlFileName>
      <LongName>000129 - Disclosure - Risk/Return Detail Data {Elements} - AMG River Road Focused Absolute Value Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.amgfunds.com/role/DisclosureRiskReturnDetailDataElementsAMGRiverRoadFocusedAbsoluteValueFund</Role>
      <ShortName>Risk/Return Detail Data- AMG River Road Focused Absolute Value Fund</ShortName>
      <MenuCategory></MenuCategory>
      <Position>25</Position>
    </Report>
    <Report instance="afiv1-20190228.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>true</HasEmbeddedReports>
      <HtmlFileName>R74.htm</HtmlFileName>
      <LongName>000131 - Document - Risk/Return Summary {Unlabeled} - AMG River Road Long-Short Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.amgfunds.com/role/DocumentRiskReturnSummaryUnlabeledAMGRiverRoadLong-ShortFund</Role>
      <ShortName>Risk/Return Summary- AMG River Road Long-Short Fund</ShortName>
      <MenuCategory></MenuCategory>
      <Position>26</Position>
    </Report>
    <Report instance="afiv1-20190228.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R79.htm</HtmlFileName>
      <LongName>000139 - Disclosure - Risk/Return Detail Data {Elements} - AMG River Road Long-Short Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.amgfunds.com/role/DisclosureRiskReturnDetailDataElementsAMGRiverRoadLong-ShortFund</Role>
      <ShortName>Risk/Return Detail Data- AMG River Road Long-Short Fund</ShortName>
      <MenuCategory></MenuCategory>
      <Position>27</Position>
    </Report>
    <Report instance="afiv1-20190228.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>true</HasEmbeddedReports>
      <HtmlFileName>R80.htm</HtmlFileName>
      <LongName>000141 - Document - Risk/Return Summary {Unlabeled} - AMG River Road Small-Mid Cap Value Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.amgfunds.com/role/DocumentRiskReturnSummaryUnlabeledAMGRiverRoadSmall-MidCapValueFund</Role>
      <ShortName>Risk/Return Summary- AMG River Road Small-Mid Cap Value Fund</ShortName>
      <MenuCategory></MenuCategory>
      <Position>28</Position>
    </Report>
    <Report instance="afiv1-20190228.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R85.htm</HtmlFileName>
      <LongName>000149 - Disclosure - Risk/Return Detail Data {Elements} - AMG River Road Small-Mid Cap Value Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.amgfunds.com/role/DisclosureRiskReturnDetailDataElementsAMGRiverRoadSmall-MidCapValueFund</Role>
      <ShortName>Risk/Return Detail Data- AMG River Road Small-Mid Cap Value Fund</ShortName>
      <MenuCategory></MenuCategory>
      <Position>29</Position>
    </Report>
    <Report instance="afiv1-20190228.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>true</HasEmbeddedReports>
      <HtmlFileName>R86.htm</HtmlFileName>
      <LongName>000151 - Document - Risk/Return Summary {Unlabeled} - AMG River Road Small Cap Value Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.amgfunds.com/role/DocumentRiskReturnSummaryUnlabeledAMGRiverRoadSmallCapValueFund</Role>
      <ShortName>Risk/Return Summary- AMG River Road Small Cap Value Fund</ShortName>
      <MenuCategory></MenuCategory>
      <Position>30</Position>
    </Report>
    <Report instance="afiv1-20190228.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R91.htm</HtmlFileName>
      <LongName>000159 - Disclosure - Risk/Return Detail Data {Elements} - AMG River Road Small Cap Value Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.amgfunds.com/role/DisclosureRiskReturnDetailDataElementsAMGRiverRoadSmallCapValueFund</Role>
      <ShortName>Risk/Return Detail Data- AMG River Road Small Cap Value Fund</ShortName>
      <MenuCategory></MenuCategory>
      <Position>31</Position>
    </Report>
    <Report instance="afiv1-20190228.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R92.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>32</Position>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <LongName>All Reports</LongName>
      <ReportType>Book</ReportType>
      <ShortName>All Reports</ShortName>
    </Report>
  </MyReports>
  <InputFiles>
    <File>afiv1-20190228.xml</File>
    <File>afiv1-20190228.xsd</File>
    <File>afiv1-20190228_cal.xml</File>
    <File>afiv1-20190228_def.xml</File>
    <File>afiv1-20190228_lab.xml</File>
    <File>afiv1-20190228_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>
    <File>BarChart6.png</File>
    <File>BarChart7.png</File>
    <File>BarChart8.png</File>
    <File>BarChart9.png</File>
    <File>BarChart10.png</File>
    <File>BarChart11.png</File>
    <File>BarChart12.png</File>
    <File>BarChart13.png</File>
    <File>BarChart14.png</File>
    <File>BarChart15.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>true</HasCalculationLinkbase>
</FilingSummary>
