<?xml version="1.0" encoding="utf-8"?>
<FilingSummary xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
  <Version>2.2.0.25</Version>
  <ReportType />
  <MyReports>
    <Report>
      <IsDefault>true</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>00101 - Document - Document And Entity Information {Elements}</LongName>
      <ShortName>Document And Entity Information</ShortName>
      <Role>http://www.avivainvestors.us.com/role/DocumentDocumentandEntityInformation</Role>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <XmlFileName>R1.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>01102 - Document - Risk/Return Summary {Unlabeled} (Aviva Investors Emerging Markets Local Currency Bond Fund - Institutional Class Shares)</LongName>
      <ShortName>Risk/Return Summary  (Aviva Investors Emerging Markets Local Currency Bond Fund - Institutional Class Shares)</ShortName>
      <Role>http://www.avivainvestors.us.com/role/RiskReturn_S000031873Member1</Role>
      <ContainEmbeddedReports>true</ContainEmbeddedReports>
      <XmlFileName>R2.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>040000 - Disclosure - Risk/Return Detail Data {Elements}</LongName>
      <ShortName>Risk/Return Detail Data</ShortName>
      <Role>http://xbrl.sec.gov/rr/role/RiskReturnDetailData</Role>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <XmlFileName>R6.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>06107 - Document - Risk/Return Summary {Unlabeled} (Aviva Investors Emerging Markets Local Currency Bond Fund - Investor Class Shares)</LongName>
      <ShortName>Risk/Return Summary  (Aviva Investors Emerging Markets Local Currency Bond Fund - Investor Class Shares)</ShortName>
      <Role>http://www.avivainvestors.us.com/role/RiskReturn_S000031873Member2</Role>
      <ContainEmbeddedReports>true</ContainEmbeddedReports>
      <XmlFileName>R7.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>06111 - Disclosure - Risk/Return Detail Data {Elements} (Aviva Investors Emerging Markets Local Currency Bond Fund - Investor Class Shares)</LongName>
      <ShortName>Risk/Return Detail Data  (Aviva Investors Emerging Markets Local Currency Bond Fund - Investor Class Shares)</ShortName>
      <Role>http://www.avivainvestors.us.com/role/RiskReturnDetailData_S000031873Member2</Role>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <XmlFileName>R11.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Book</ReportType>
      <LongName>All Reports</LongName>
      <ShortName>All Reports</ShortName>
      <Role />
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <XmlFileName />
    </Report>
  </MyReports>
  <EntityCount>1</EntityCount>
  <ContextCount>7</ContextCount>
  <SegmentCount>5</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <UnitCount>2</UnitCount>
  <ElementCount>45</ElementCount>
  <FootnotesReported>true</FootnotesReported>
  <TuplesReported>false</TuplesReported>
  <ContextSummary>
    <ContextSummary>
      <ContextName>eol_0001135428-11-000239_STD_1_20110419_0_396770x-9992452_429423x-9992454</ContextName>
      <ElementCount>9</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>eol_0001135428-11-000239_STD_1_20110419_0_396770x-9992452_396840x-9992450</ContextName>
      <ElementCount>26</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>eol_0001135428-11-000239_STD_1_20110419_0_396770x-9992452_396840x-9992451_429423x-9992453</ContextName>
      <ElementCount>2</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>eol_0001135428-11-000239_STD_1_20110419_0</ContextName>
      <ElementCount>8</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>eol_0001135428-11-000239_STD_1_20110419_0_396770x-9992452_396840x-9992450_429423x-9992454</ContextName>
      <ElementCount>2</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>eol_0001135428-11-000239_STD_1_20110419_0_396770x-9992452_396840x-9992451</ContextName>
      <ElementCount>26</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>eol_0001135428-11-000239_STD_1_20110419_0_396770x-9992452_429423x-9992453</ContextName>
      <ElementCount>8</ElementCount>
    </ContextSummary>
  </ContextSummary>
  <BaseTaxonomies />
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
