<?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>000001 - Document - Document and Entity Information {Elements}</LongName>
      <ShortName>Document and Entity Information</ShortName>
      <Role>http://www.fidelity.com/role/DocumentDocumentAndEntityInformationElements</Role>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <XmlFileName>R1.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>000101 - Document - Risk/Return Summary {Unlabeled} - (Automotive Portfolio)</LongName>
      <ShortName>Risk/Return Summary  - (Automotive Portfolio)</ShortName>
      <Role>http://www.fidelity.com/role/DocumentRiskReturnSummaryUnlabeledAutomotivePortfolio</Role>
      <ContainEmbeddedReports>true</ContainEmbeddedReports>
      <XmlFileName>R2.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>000108 - Disclosure - Risk/Return Detail Data {Elements} - (Automotive Portfolio)</LongName>
      <ShortName>Risk/Return Detail Data  - (Automotive Portfolio)</ShortName>
      <Role>http://www.fidelity.com/role/DisclosureRiskReturnDetailDataElementsAutomotivePortfolio</Role>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <XmlFileName>R9.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>000201 - Document - Risk/Return Summary {Unlabeled} - (Construction and Housing Portfolio)</LongName>
      <ShortName>Risk/Return Summary  - (Construction and Housing Portfolio)</ShortName>
      <Role>http://www.fidelity.com/role/DocumentRiskReturnSummaryUnlabeledConstructionAndHousingPortfolio</Role>
      <ContainEmbeddedReports>true</ContainEmbeddedReports>
      <XmlFileName>R10.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>000208 - Disclosure - Risk/Return Detail Data {Elements} - (Construction and Housing Portfolio)</LongName>
      <ShortName>Risk/Return Detail Data  - (Construction and Housing Portfolio)</ShortName>
      <Role>http://www.fidelity.com/role/DisclosureRiskReturnDetailDataElementsConstructionAndHousingPortfolio</Role>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <XmlFileName>R17.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>000301 - Document - Risk/Return Summary {Unlabeled} - (Consumer Discretionary Portfolio)</LongName>
      <ShortName>Risk/Return Summary  - (Consumer Discretionary Portfolio)</ShortName>
      <Role>http://www.fidelity.com/role/DocumentRiskReturnSummaryUnlabeledConsumerDiscretionaryPortfolio</Role>
      <ContainEmbeddedReports>true</ContainEmbeddedReports>
      <XmlFileName>R18.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>000308 - Disclosure - Risk/Return Detail Data {Elements} - (Consumer Discretionary Portfolio)</LongName>
      <ShortName>Risk/Return Detail Data  - (Consumer Discretionary Portfolio)</ShortName>
      <Role>http://www.fidelity.com/role/DisclosureRiskReturnDetailDataElementsConsumerDiscretionaryPortfolio</Role>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <XmlFileName>R25.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>000401 - Document - Risk/Return Summary {Unlabeled} - (Leisure Portfolio)</LongName>
      <ShortName>Risk/Return Summary  - (Leisure Portfolio)</ShortName>
      <Role>http://www.fidelity.com/role/DocumentRiskReturnSummaryUnlabeledLeisurePortfolio</Role>
      <ContainEmbeddedReports>true</ContainEmbeddedReports>
      <XmlFileName>R26.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>000408 - Disclosure - Risk/Return Detail Data {Elements} - (Leisure Portfolio)</LongName>
      <ShortName>Risk/Return Detail Data  - (Leisure Portfolio)</ShortName>
      <Role>http://www.fidelity.com/role/DisclosureRiskReturnDetailDataElementsLeisurePortfolio</Role>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <XmlFileName>R33.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>000501 - Document - Risk/Return Summary {Unlabeled} - (Multimedia Portfolio)</LongName>
      <ShortName>Risk/Return Summary  - (Multimedia Portfolio)</ShortName>
      <Role>http://www.fidelity.com/role/DocumentRiskReturnSummaryUnlabeledMultimediaPortfolio</Role>
      <ContainEmbeddedReports>true</ContainEmbeddedReports>
      <XmlFileName>R34.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>000508 - Disclosure - Risk/Return Detail Data {Elements} - (Multimedia Portfolio)</LongName>
      <ShortName>Risk/Return Detail Data  - (Multimedia Portfolio)</ShortName>
      <Role>http://www.fidelity.com/role/DisclosureRiskReturnDetailDataElementsMultimediaPortfolio</Role>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <XmlFileName>R41.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>000601 - Document - Risk/Return Summary {Unlabeled} - (Retailing Portfolio)</LongName>
      <ShortName>Risk/Return Summary  - (Retailing Portfolio)</ShortName>
      <Role>http://www.fidelity.com/role/DocumentRiskReturnSummaryUnlabeledRetailingPortfolio</Role>
      <ContainEmbeddedReports>true</ContainEmbeddedReports>
      <XmlFileName>R42.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>000608 - Disclosure - Risk/Return Detail Data {Elements} - (Retailing Portfolio)</LongName>
      <ShortName>Risk/Return Detail Data  - (Retailing Portfolio)</ShortName>
      <Role>http://www.fidelity.com/role/DisclosureRiskReturnDetailDataElementsRetailingPortfolio</Role>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <XmlFileName>R49.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>000701 - Document - Risk/Return Summary {Unlabeled} - (Consumer Staples Portfolio) (Retail)</LongName>
      <ShortName>Risk/Return Summary  - (Consumer Staples Portfolio) (Retail)</ShortName>
      <Role>http://www.fidelity.com/role/DocumentRiskReturnSummaryUnlabeledConsumerStaplesPortfolio</Role>
      <ContainEmbeddedReports>true</ContainEmbeddedReports>
      <XmlFileName>R50.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>000708 - Disclosure - Risk/Return Detail Data {Elements} - (Consumer Staples Portfolio) (Retail)</LongName>
      <ShortName>Risk/Return Detail Data  - (Consumer Staples Portfolio) (Retail)</ShortName>
      <Role>http://www.fidelity.com/role/DisclosureRiskReturnDetailDataElementsConsumerStaplesPortfolio</Role>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <XmlFileName>R57.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>000801 - Document - Risk/Return Summary {Unlabeled} - (Energy Portfolio)</LongName>
      <ShortName>Risk/Return Summary  - (Energy Portfolio)</ShortName>
      <Role>http://www.fidelity.com/role/DocumentRiskReturnSummaryUnlabeledEnergyPortfolio</Role>
      <ContainEmbeddedReports>true</ContainEmbeddedReports>
      <XmlFileName>R58.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>000808 - Disclosure - Risk/Return Detail Data {Elements} - (Energy Portfolio)</LongName>
      <ShortName>Risk/Return Detail Data  - (Energy Portfolio)</ShortName>
      <Role>http://www.fidelity.com/role/DisclosureRiskReturnDetailDataElementsEnergyPortfolio</Role>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <XmlFileName>R65.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>000901 - Document - Risk/Return Summary {Unlabeled} - (Energy Service Portfolio)</LongName>
      <ShortName>Risk/Return Summary  - (Energy Service Portfolio)</ShortName>
      <Role>http://www.fidelity.com/role/DocumentRiskReturnSummaryUnlabeledEnergyServicePortfolio</Role>
      <ContainEmbeddedReports>true</ContainEmbeddedReports>
      <XmlFileName>R66.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>000908 - Disclosure - Risk/Return Detail Data {Elements} - (Energy Service Portfolio)</LongName>
      <ShortName>Risk/Return Detail Data  - (Energy Service Portfolio)</ShortName>
      <Role>http://www.fidelity.com/role/DisclosureRiskReturnDetailDataElementsEnergyServicePortfolio</Role>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <XmlFileName>R73.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>001001 - Document - Risk/Return Summary {Unlabeled} - (Natural Gas Portfolio)</LongName>
      <ShortName>Risk/Return Summary  - (Natural Gas Portfolio)</ShortName>
      <Role>http://www.fidelity.com/role/DocumentRiskReturnSummaryUnlabeledNaturalGasPortfolio</Role>
      <ContainEmbeddedReports>true</ContainEmbeddedReports>
      <XmlFileName>R74.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>001008 - Disclosure - Risk/Return Detail Data {Elements} - (Natural Gas Portfolio)</LongName>
      <ShortName>Risk/Return Detail Data  - (Natural Gas Portfolio)</ShortName>
      <Role>http://www.fidelity.com/role/DisclosureRiskReturnDetailDataElementsNaturalGasPortfolio</Role>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <XmlFileName>R81.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>001101 - Document - Risk/Return Summary {Unlabeled} - (Natural Resources Portfolio)</LongName>
      <ShortName>Risk/Return Summary  - (Natural Resources Portfolio)</ShortName>
      <Role>http://www.fidelity.com/role/DocumentRiskReturnSummaryUnlabeledNaturalResourcesPortfolio</Role>
      <ContainEmbeddedReports>true</ContainEmbeddedReports>
      <XmlFileName>R82.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>001108 - Disclosure - Risk/Return Detail Data {Elements} - (Natural Resources Portfolio)</LongName>
      <ShortName>Risk/Return Detail Data  - (Natural Resources Portfolio)</ShortName>
      <Role>http://www.fidelity.com/role/DisclosureRiskReturnDetailDataElementsNaturalResourcesPortfolio</Role>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <XmlFileName>R89.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>001201 - Document - Risk/Return Summary {Unlabeled} - (Banking Portfolio)</LongName>
      <ShortName>Risk/Return Summary  - (Banking Portfolio)</ShortName>
      <Role>http://www.fidelity.com/role/DocumentRiskReturnSummaryUnlabeledBankingPortfolio</Role>
      <ContainEmbeddedReports>true</ContainEmbeddedReports>
      <XmlFileName>R90.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>001208 - Disclosure - Risk/Return Detail Data {Elements} - (Banking Portfolio)</LongName>
      <ShortName>Risk/Return Detail Data  - (Banking Portfolio)</ShortName>
      <Role>http://www.fidelity.com/role/DisclosureRiskReturnDetailDataElementsBankingPortfolio</Role>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <XmlFileName>R97.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>001301 - Document - Risk/Return Summary {Unlabeled} - (Brokerage and Investment Management Portfolio)</LongName>
      <ShortName>Risk/Return Summary  - (Brokerage and Investment Management Portfolio)</ShortName>
      <Role>http://www.fidelity.com/role/DocumentRiskReturnSummaryUnlabeledBrokerageAndInvestmentManagementPortfolio</Role>
      <ContainEmbeddedReports>true</ContainEmbeddedReports>
      <XmlFileName>R98.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>001308 - Disclosure - Risk/Return Detail Data {Elements} - (Brokerage and Investment Management Portfolio)</LongName>
      <ShortName>Risk/Return Detail Data  - (Brokerage and Investment Management Portfolio)</ShortName>
      <Role>http://www.fidelity.com/role/DisclosureRiskReturnDetailDataElementsBrokerageAndInvestmentManagementPortfolio</Role>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <XmlFileName>R105.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>001401 - Document - Risk/Return Summary {Unlabeled} - (Consumer Finance Portfolio)</LongName>
      <ShortName>Risk/Return Summary  - (Consumer Finance Portfolio)</ShortName>
      <Role>http://www.fidelity.com/role/DocumentRiskReturnSummaryUnlabeledConsumerFinancePortfolio</Role>
      <ContainEmbeddedReports>true</ContainEmbeddedReports>
      <XmlFileName>R106.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>001408 - Disclosure - Risk/Return Detail Data {Elements} - (Consumer Finance Portfolio)</LongName>
      <ShortName>Risk/Return Detail Data  - (Consumer Finance Portfolio)</ShortName>
      <Role>http://www.fidelity.com/role/DisclosureRiskReturnDetailDataElementsConsumerFinancePortfolio</Role>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <XmlFileName>R113.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>001501 - Document - Risk/Return Summary {Unlabeled} - (Financial Services Portfolio)</LongName>
      <ShortName>Risk/Return Summary  - (Financial Services Portfolio)</ShortName>
      <Role>http://www.fidelity.com/role/DocumentRiskReturnSummaryUnlabeledFinancialServicesPortfolio</Role>
      <ContainEmbeddedReports>true</ContainEmbeddedReports>
      <XmlFileName>R114.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>001508 - Disclosure - Risk/Return Detail Data {Elements} - (Financial Services Portfolio)</LongName>
      <ShortName>Risk/Return Detail Data  - (Financial Services Portfolio)</ShortName>
      <Role>http://www.fidelity.com/role/DisclosureRiskReturnDetailDataElementsFinancialServicesPortfolio</Role>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <XmlFileName>R121.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>001601 - Document - Risk/Return Summary {Unlabeled} - (Insurance Portfolio)</LongName>
      <ShortName>Risk/Return Summary  - (Insurance Portfolio)</ShortName>
      <Role>http://www.fidelity.com/role/DocumentRiskReturnSummaryUnlabeledInsurancePortfolio</Role>
      <ContainEmbeddedReports>true</ContainEmbeddedReports>
      <XmlFileName>R122.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>001608 - Disclosure - Risk/Return Detail Data {Elements} - (Insurance Portfolio)</LongName>
      <ShortName>Risk/Return Detail Data  - (Insurance Portfolio)</ShortName>
      <Role>http://www.fidelity.com/role/DisclosureRiskReturnDetailDataElementsInsurancePortfolio</Role>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <XmlFileName>R129.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>001701 - Document - Risk/Return Summary {Unlabeled} - (Biotechnology Portfolio)</LongName>
      <ShortName>Risk/Return Summary  - (Biotechnology Portfolio)</ShortName>
      <Role>http://www.fidelity.com/role/DocumentRiskReturnSummaryUnlabeledBiotechnologyPortfolio</Role>
      <ContainEmbeddedReports>true</ContainEmbeddedReports>
      <XmlFileName>R130.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>001708 - Disclosure - Risk/Return Detail Data {Elements} - (Biotechnology Portfolio)</LongName>
      <ShortName>Risk/Return Detail Data  - (Biotechnology Portfolio)</ShortName>
      <Role>http://www.fidelity.com/role/DisclosureRiskReturnDetailDataElementsBiotechnologyPortfolio</Role>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <XmlFileName>R137.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>001801 - Document - Risk/Return Summary {Unlabeled} - (Health Care Portfolio)</LongName>
      <ShortName>Risk/Return Summary  - (Health Care Portfolio)</ShortName>
      <Role>http://www.fidelity.com/role/DocumentRiskReturnSummaryUnlabeledHealthCarePortfolio</Role>
      <ContainEmbeddedReports>true</ContainEmbeddedReports>
      <XmlFileName>R138.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>001808 - Disclosure - Risk/Return Detail Data {Elements} - (Health Care Portfolio)</LongName>
      <ShortName>Risk/Return Detail Data  - (Health Care Portfolio)</ShortName>
      <Role>http://www.fidelity.com/role/DisclosureRiskReturnDetailDataElementsHealthCarePortfolio</Role>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <XmlFileName>R145.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>001901 - Document - Risk/Return Summary {Unlabeled} - (Medical Delivery Portfolio)</LongName>
      <ShortName>Risk/Return Summary  - (Medical Delivery Portfolio)</ShortName>
      <Role>http://www.fidelity.com/role/DocumentRiskReturnSummaryUnlabeledMedicalDeliveryPortfolio</Role>
      <ContainEmbeddedReports>true</ContainEmbeddedReports>
      <XmlFileName>R146.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>001908 - Disclosure - Risk/Return Detail Data {Elements} - (Medical Delivery Portfolio)</LongName>
      <ShortName>Risk/Return Detail Data  - (Medical Delivery Portfolio)</ShortName>
      <Role>http://www.fidelity.com/role/DisclosureRiskReturnDetailDataElementsMedicalDeliveryPortfolio</Role>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <XmlFileName>R153.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>002001 - Document - Risk/Return Summary {Unlabeled} - (Medical Equipment and Systems Portfolio)</LongName>
      <ShortName>Risk/Return Summary  - (Medical Equipment and Systems Portfolio)</ShortName>
      <Role>http://www.fidelity.com/role/DocumentRiskReturnSummaryUnlabeledMedicalEquipmentAndSystemsPortfolio</Role>
      <ContainEmbeddedReports>true</ContainEmbeddedReports>
      <XmlFileName>R154.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>002008 - Disclosure - Risk/Return Detail Data {Elements} - (Medical Equipment and Systems Portfolio)</LongName>
      <ShortName>Risk/Return Detail Data  - (Medical Equipment and Systems Portfolio)</ShortName>
      <Role>http://www.fidelity.com/role/DisclosureRiskReturnDetailDataElementsMedicalEquipmentAndSystemsPortfolio</Role>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <XmlFileName>R161.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>002101 - Document - Risk/Return Summary {Unlabeled} - (Pharmaceuticals Portfolio)</LongName>
      <ShortName>Risk/Return Summary  - (Pharmaceuticals Portfolio)</ShortName>
      <Role>http://www.fidelity.com/role/DocumentRiskReturnSummaryUnlabeledPharmaceuticalsPortfolio</Role>
      <ContainEmbeddedReports>true</ContainEmbeddedReports>
      <XmlFileName>R162.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>002108 - Disclosure - Risk/Return Detail Data {Elements} - (Pharmaceuticals Portfolio)</LongName>
      <ShortName>Risk/Return Detail Data  - (Pharmaceuticals Portfolio)</ShortName>
      <Role>http://www.fidelity.com/role/DisclosureRiskReturnDetailDataElementsPharmaceuticalsPortfolio</Role>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <XmlFileName>R169.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>002201 - Document - Risk/Return Summary {Unlabeled} - (Air Tranportation Portfolio)</LongName>
      <ShortName>Risk/Return Summary  - (Air Tranportation Portfolio)</ShortName>
      <Role>http://www.fidelity.com/role/DocumentRiskReturnSummaryUnlabeledAirTranportationPortfolio</Role>
      <ContainEmbeddedReports>true</ContainEmbeddedReports>
      <XmlFileName>R170.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>002208 - Disclosure - Risk/Return Detail Data {Elements} - (Air Tranportation Portfolio)</LongName>
      <ShortName>Risk/Return Detail Data  - (Air Tranportation Portfolio)</ShortName>
      <Role>http://www.fidelity.com/role/DisclosureRiskReturnDetailDataElementsAirTranportationPortfolio</Role>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <XmlFileName>R177.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>002301 - Document - Risk/Return Summary {Unlabeled} - (Defense and Aerospace Portfolio)</LongName>
      <ShortName>Risk/Return Summary  - (Defense and Aerospace Portfolio)</ShortName>
      <Role>http://www.fidelity.com/role/DocumentRiskReturnSummaryUnlabeledDefenseAndAerospacePortfolio</Role>
      <ContainEmbeddedReports>true</ContainEmbeddedReports>
      <XmlFileName>R178.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>002308 - Disclosure - Risk/Return Detail Data {Elements} - (Defense and Aerospace Portfolio)</LongName>
      <ShortName>Risk/Return Detail Data  - (Defense and Aerospace Portfolio)</ShortName>
      <Role>http://www.fidelity.com/role/DisclosureRiskReturnDetailDataElementsDefenseAndAerospacePortfolio</Role>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <XmlFileName>R185.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>002401 - Document - Risk/Return Summary {Unlabeled} - (Environment and Alternative Energy Portfolio)</LongName>
      <ShortName>Risk/Return Summary  - (Environment and Alternative Energy Portfolio)</ShortName>
      <Role>http://www.fidelity.com/role/DocumentRiskReturnSummaryUnlabeledEnvironmentAndAlternativeEnergyPortfolio</Role>
      <ContainEmbeddedReports>true</ContainEmbeddedReports>
      <XmlFileName>R186.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>002408 - Disclosure - Risk/Return Detail Data {Elements} - (Environment and Alternative Energy Portfolio)</LongName>
      <ShortName>Risk/Return Detail Data  - (Environment and Alternative Energy Portfolio)</ShortName>
      <Role>http://www.fidelity.com/role/DisclosureRiskReturnDetailDataElementsEnvironmentAndAlternativeEnergyPortfolio</Role>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <XmlFileName>R193.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>002501 - Document - Risk/Return Summary {Unlabeled} - (Industrial Equipment Portfolio)</LongName>
      <ShortName>Risk/Return Summary  - (Industrial Equipment Portfolio)</ShortName>
      <Role>http://www.fidelity.com/role/DocumentRiskReturnSummaryUnlabeledIndustrialEquipmentPortfolio</Role>
      <ContainEmbeddedReports>true</ContainEmbeddedReports>
      <XmlFileName>R194.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>002508 - Disclosure - Risk/Return Detail Data {Elements} - (Industrial Equipment Portfolio)</LongName>
      <ShortName>Risk/Return Detail Data  - (Industrial Equipment Portfolio)</ShortName>
      <Role>http://www.fidelity.com/role/DisclosureRiskReturnDetailDataElementsIndustrialEquipmentPortfolio</Role>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <XmlFileName>R201.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>002601 - Document - Risk/Return Summary {Unlabeled} - (Industrials Portfolio)</LongName>
      <ShortName>Risk/Return Summary  - (Industrials Portfolio)</ShortName>
      <Role>http://www.fidelity.com/role/DocumentRiskReturnSummaryUnlabeledIndustrialsPortfolio</Role>
      <ContainEmbeddedReports>true</ContainEmbeddedReports>
      <XmlFileName>R202.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>002608 - Disclosure - Risk/Return Detail Data {Elements} - (Industrials Portfolio)</LongName>
      <ShortName>Risk/Return Detail Data  - (Industrials Portfolio)</ShortName>
      <Role>http://www.fidelity.com/role/DisclosureRiskReturnDetailDataElementsIndustrialsPortfolio</Role>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <XmlFileName>R209.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>002701 - Document - Risk/Return Summary {Unlabeled} - (Transportation Portfolio)</LongName>
      <ShortName>Risk/Return Summary  - (Transportation Portfolio)</ShortName>
      <Role>http://www.fidelity.com/role/DocumentRiskReturnSummaryUnlabeledTransportationPortfolio</Role>
      <ContainEmbeddedReports>true</ContainEmbeddedReports>
      <XmlFileName>R210.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>002708 - Disclosure - Risk/Return Detail Data {Elements} - (Transportation Portfolio)</LongName>
      <ShortName>Risk/Return Detail Data  - (Transportation Portfolio)</ShortName>
      <Role>http://www.fidelity.com/role/DisclosureRiskReturnDetailDataElementsTransportationPortfolio</Role>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <XmlFileName>R217.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>002801 - Document - Risk/Return Summary {Unlabeled} - (Communications Equipment Portfolio)</LongName>
      <ShortName>Risk/Return Summary  - (Communications Equipment Portfolio)</ShortName>
      <Role>http://www.fidelity.com/role/DocumentRiskReturnSummaryUnlabeledCommunicationsEquipmentPortfolio</Role>
      <ContainEmbeddedReports>true</ContainEmbeddedReports>
      <XmlFileName>R218.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>002808 - Disclosure - Risk/Return Detail Data {Elements} - (Communications Equipment Portfolio)</LongName>
      <ShortName>Risk/Return Detail Data  - (Communications Equipment Portfolio)</ShortName>
      <Role>http://www.fidelity.com/role/DisclosureRiskReturnDetailDataElementsCommunicationsEquipmentPortfolio</Role>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <XmlFileName>R225.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>002901 - Document - Risk/Return Summary {Unlabeled} - (Computers Portfolio)</LongName>
      <ShortName>Risk/Return Summary  - (Computers Portfolio)</ShortName>
      <Role>http://www.fidelity.com/role/DocumentRiskReturnSummaryUnlabeledComputersPortfolio</Role>
      <ContainEmbeddedReports>true</ContainEmbeddedReports>
      <XmlFileName>R226.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>002908 - Disclosure - Risk/Return Detail Data {Elements} - (Computers Portfolio)</LongName>
      <ShortName>Risk/Return Detail Data  - (Computers Portfolio)</ShortName>
      <Role>http://www.fidelity.com/role/DisclosureRiskReturnDetailDataElementsComputersPortfolio</Role>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <XmlFileName>R233.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>003001 - Document - Risk/Return Summary {Unlabeled} - (Electronics Portfolio)</LongName>
      <ShortName>Risk/Return Summary  - (Electronics Portfolio)</ShortName>
      <Role>http://www.fidelity.com/role/DocumentRiskReturnSummaryUnlabeledElectronicsPortfolio</Role>
      <ContainEmbeddedReports>true</ContainEmbeddedReports>
      <XmlFileName>R234.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>003008 - Disclosure - Risk/Return Detail Data {Elements} - (Electronics Portfolio)</LongName>
      <ShortName>Risk/Return Detail Data  - (Electronics Portfolio)</ShortName>
      <Role>http://www.fidelity.com/role/DisclosureRiskReturnDetailDataElementsElectronicsPortfolio</Role>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <XmlFileName>R241.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>003101 - Document - Risk/Return Summary {Unlabeled} - (IT Services Portfolio)</LongName>
      <ShortName>Risk/Return Summary  - (IT Services Portfolio)</ShortName>
      <Role>http://www.fidelity.com/role/DocumentRiskReturnSummaryUnlabeledItServicesPortfolio</Role>
      <ContainEmbeddedReports>true</ContainEmbeddedReports>
      <XmlFileName>R242.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>003108 - Disclosure - Risk/Return Detail Data {Elements} - (IT Services Portfolio)</LongName>
      <ShortName>Risk/Return Detail Data  - (IT Services Portfolio)</ShortName>
      <Role>http://www.fidelity.com/role/DisclosureRiskReturnDetailDataElementsItServicesPortfolio</Role>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <XmlFileName>R249.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>003201 - Document - Risk/Return Summary {Unlabeled} - (Software and Computer Services Portfolio)</LongName>
      <ShortName>Risk/Return Summary  - (Software and Computer Services Portfolio)</ShortName>
      <Role>http://www.fidelity.com/role/DocumentRiskReturnSummaryUnlabeledSoftwareAndComputerServicesPortfolio</Role>
      <ContainEmbeddedReports>true</ContainEmbeddedReports>
      <XmlFileName>R250.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>003208 - Disclosure - Risk/Return Detail Data {Elements} - (Software and Computer Services Portfolio)</LongName>
      <ShortName>Risk/Return Detail Data  - (Software and Computer Services Portfolio)</ShortName>
      <Role>http://www.fidelity.com/role/DisclosureRiskReturnDetailDataElementsSoftwareAndComputerServicesPortfolio</Role>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <XmlFileName>R257.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>003301 - Document - Risk/Return Summary {Unlabeled} - (Technology Portfolio)</LongName>
      <ShortName>Risk/Return Summary  - (Technology Portfolio)</ShortName>
      <Role>http://www.fidelity.com/role/DocumentRiskReturnSummaryUnlabeledTechnologyPortfolio</Role>
      <ContainEmbeddedReports>true</ContainEmbeddedReports>
      <XmlFileName>R258.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>003308 - Disclosure - Risk/Return Detail Data {Elements} - (Technology Portfolio)</LongName>
      <ShortName>Risk/Return Detail Data  - (Technology Portfolio)</ShortName>
      <Role>http://www.fidelity.com/role/DisclosureRiskReturnDetailDataElementsTechnologyPortfolio</Role>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <XmlFileName>R265.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>003401 - Document - Risk/Return Summary {Unlabeled} - (Chemicals Portfolio)</LongName>
      <ShortName>Risk/Return Summary  - (Chemicals Portfolio)</ShortName>
      <Role>http://www.fidelity.com/role/DocumentRiskReturnSummaryUnlabeledChemicalsPortfolio</Role>
      <ContainEmbeddedReports>true</ContainEmbeddedReports>
      <XmlFileName>R266.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>003408 - Disclosure - Risk/Return Detail Data {Elements} - (Chemicals Portfolio)</LongName>
      <ShortName>Risk/Return Detail Data  - (Chemicals Portfolio)</ShortName>
      <Role>http://www.fidelity.com/role/DisclosureRiskReturnDetailDataElementsChemicalsPortfolio</Role>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <XmlFileName>R273.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>003501 - Document - Risk/Return Summary {Unlabeled} - (Gold Portfolio) (Retail)</LongName>
      <ShortName>Risk/Return Summary  - (Gold Portfolio) (Retail)</ShortName>
      <Role>http://www.fidelity.com/role/DocumentRiskReturnSummaryUnlabeledGoldPortfolio</Role>
      <ContainEmbeddedReports>true</ContainEmbeddedReports>
      <XmlFileName>R274.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>003508 - Disclosure - Risk/Return Detail Data {Elements} - (Gold Portfolio) (Retail)</LongName>
      <ShortName>Risk/Return Detail Data  - (Gold Portfolio) (Retail)</ShortName>
      <Role>http://www.fidelity.com/role/DisclosureRiskReturnDetailDataElementsGoldPortfolio</Role>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <XmlFileName>R281.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>003601 - Document - Risk/Return Summary {Unlabeled} - (Materials Portfolio) (Retail)</LongName>
      <ShortName>Risk/Return Summary  - (Materials Portfolio) (Retail)</ShortName>
      <Role>http://www.fidelity.com/role/DocumentRiskReturnSummaryUnlabeledMaterialsPortfolio</Role>
      <ContainEmbeddedReports>true</ContainEmbeddedReports>
      <XmlFileName>R282.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>003608 - Disclosure - Risk/Return Detail Data {Elements} - (Materials Portfolio) (Retail)</LongName>
      <ShortName>Risk/Return Detail Data  - (Materials Portfolio) (Retail)</ShortName>
      <Role>http://www.fidelity.com/role/DisclosureRiskReturnDetailDataElementsMaterialsPortfolio</Role>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <XmlFileName>R289.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>003701 - Document - Risk/Return Summary {Unlabeled} - (Telecommunications Portfolio) (Retail)</LongName>
      <ShortName>Risk/Return Summary  - (Telecommunications Portfolio) (Retail)</ShortName>
      <Role>http://www.fidelity.com/role/DocumentRiskReturnSummaryUnlabeledTelecommunicationsPortfolio</Role>
      <ContainEmbeddedReports>true</ContainEmbeddedReports>
      <XmlFileName>R290.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>003708 - Disclosure - Risk/Return Detail Data {Elements} - (Telecommunications Portfolio) (Retail)</LongName>
      <ShortName>Risk/Return Detail Data  - (Telecommunications Portfolio) (Retail)</ShortName>
      <Role>http://www.fidelity.com/role/DisclosureRiskReturnDetailDataElementsTelecommunicationsPortfolio</Role>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <XmlFileName>R297.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>003801 - Document - Risk/Return Summary {Unlabeled} - (Wireless Portfolio)</LongName>
      <ShortName>Risk/Return Summary  - (Wireless Portfolio)</ShortName>
      <Role>http://www.fidelity.com/role/DocumentRiskReturnSummaryUnlabeledWirelessPortfolio</Role>
      <ContainEmbeddedReports>true</ContainEmbeddedReports>
      <XmlFileName>R298.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>003808 - Disclosure - Risk/Return Detail Data {Elements} - (Wireless Portfolio)</LongName>
      <ShortName>Risk/Return Detail Data  - (Wireless Portfolio)</ShortName>
      <Role>http://www.fidelity.com/role/DisclosureRiskReturnDetailDataElementsWirelessPortfolio</Role>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <XmlFileName>R305.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>003901 - Document - Risk/Return Summary {Unlabeled} - (Utilities Portfolio)</LongName>
      <ShortName>Risk/Return Summary  - (Utilities Portfolio)</ShortName>
      <Role>http://www.fidelity.com/role/DocumentRiskReturnSummaryUnlabeledUtilitiesPortfolio</Role>
      <ContainEmbeddedReports>true</ContainEmbeddedReports>
      <XmlFileName>R306.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>003908 - Disclosure - Risk/Return Detail Data {Elements} - (Utilities Portfolio)</LongName>
      <ShortName>Risk/Return Detail Data  - (Utilities Portfolio)</ShortName>
      <Role>http://www.fidelity.com/role/DisclosureRiskReturnDetailDataElementsUtilitiesPortfolio</Role>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <XmlFileName>R313.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>004001 - Document - Risk/Return Summary {Unlabeled} - (Consumer Staples Portfolio) (ATBC)</LongName>
      <ShortName>Risk/Return Summary  - (Consumer Staples Portfolio) (ATBC)</ShortName>
      <Role>http://www.fidelity.com/role/DocumentRiskReturnSummaryUnlabeledConsumerStaplesPortfolioAtbc</Role>
      <ContainEmbeddedReports>true</ContainEmbeddedReports>
      <XmlFileName>R314.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>004008 - Disclosure - Risk/Return Detail Data {Elements} - (Consumer Staples Portfolio) (ATBC)</LongName>
      <ShortName>Risk/Return Detail Data  - (Consumer Staples Portfolio) (ATBC)</ShortName>
      <Role>http://www.fidelity.com/role/DisclosureRiskReturnDetailDataElementsConsumerStaplesPortfolioAtbc</Role>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <XmlFileName>R321.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>004101 - Document - Risk/Return Summary {Unlabeled} - (Consumer Staples Portfolio) (Inst)</LongName>
      <ShortName>Risk/Return Summary  - (Consumer Staples Portfolio) (Inst)</ShortName>
      <Role>http://www.fidelity.com/role/DocumentRiskReturnSummaryUnlabeledConsumerStaplesPortfolioInst</Role>
      <ContainEmbeddedReports>true</ContainEmbeddedReports>
      <XmlFileName>R322.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>004108 - Disclosure - Risk/Return Detail Data {Elements} - (Consumer Staples Portfolio) (Inst)</LongName>
      <ShortName>Risk/Return Detail Data  - (Consumer Staples Portfolio) (Inst)</ShortName>
      <Role>http://www.fidelity.com/role/DisclosureRiskReturnDetailDataElementsConsumerStaplesPortfolioInst</Role>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <XmlFileName>R329.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>004201 - Document - Risk/Return Summary {Unlabeled} - (Gold Portfolio) (ATBC)</LongName>
      <ShortName>Risk/Return Summary  - (Gold Portfolio) (ATBC)</ShortName>
      <Role>http://www.fidelity.com/role/DocumentRiskReturnSummaryUnlabeledGoldPortfolioAtbc</Role>
      <ContainEmbeddedReports>true</ContainEmbeddedReports>
      <XmlFileName>R330.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>004208 - Disclosure - Risk/Return Detail Data {Elements} - (Gold Portfolio) (ATBC)</LongName>
      <ShortName>Risk/Return Detail Data  - (Gold Portfolio) (ATBC)</ShortName>
      <Role>http://www.fidelity.com/role/DisclosureRiskReturnDetailDataElementsGoldPortfolioAtbc</Role>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <XmlFileName>R337.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>004301 - Document - Risk/Return Summary {Unlabeled} - (Gold Portfolio) (Inst)</LongName>
      <ShortName>Risk/Return Summary  - (Gold Portfolio) (Inst)</ShortName>
      <Role>http://www.fidelity.com/role/DocumentRiskReturnSummaryUnlabeledGoldPortfolioInst</Role>
      <ContainEmbeddedReports>true</ContainEmbeddedReports>
      <XmlFileName>R338.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>004308 - Disclosure - Risk/Return Detail Data {Elements} - (Gold Portfolio) (Inst)</LongName>
      <ShortName>Risk/Return Detail Data  - (Gold Portfolio) (Inst)</ShortName>
      <Role>http://www.fidelity.com/role/DisclosureRiskReturnDetailDataElementsGoldPortfolioInst</Role>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <XmlFileName>R345.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>004401 - Document - Risk/Return Summary {Unlabeled} - (Materials Portfolio) (ATBC)</LongName>
      <ShortName>Risk/Return Summary  - (Materials Portfolio) (ATBC)</ShortName>
      <Role>http://www.fidelity.com/role/DocumentRiskReturnSummaryUnlabeledMaterialsPortfolioAtbc</Role>
      <ContainEmbeddedReports>true</ContainEmbeddedReports>
      <XmlFileName>R346.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>004408 - Disclosure - Risk/Return Detail Data {Elements} - (Materials Portfolio) (ATBC)</LongName>
      <ShortName>Risk/Return Detail Data  - (Materials Portfolio) (ATBC)</ShortName>
      <Role>http://www.fidelity.com/role/DisclosureRiskReturnDetailDataElementsMaterialsPortfolioAtbc</Role>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <XmlFileName>R353.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>004501 - Document - Risk/Return Summary {Unlabeled} - (Materials Portfolio) (Inst)</LongName>
      <ShortName>Risk/Return Summary  - (Materials Portfolio) (Inst)</ShortName>
      <Role>http://www.fidelity.com/role/DocumentRiskReturnSummaryUnlabeledMaterialsPortfolioInst</Role>
      <ContainEmbeddedReports>true</ContainEmbeddedReports>
      <XmlFileName>R354.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>004508 - Disclosure - Risk/Return Detail Data {Elements} - (Materials Portfolio) (Inst)</LongName>
      <ShortName>Risk/Return Detail Data  - (Materials Portfolio) (Inst)</ShortName>
      <Role>http://www.fidelity.com/role/DisclosureRiskReturnDetailDataElementsMaterialsPortfolioInst</Role>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <XmlFileName>R361.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>004601 - Document - Risk/Return Summary {Unlabeled} - (Telecommunications Portfolio) (ATBC)</LongName>
      <ShortName>Risk/Return Summary  - (Telecommunications Portfolio) (ATBC)</ShortName>
      <Role>http://www.fidelity.com/role/DocumentRiskReturnSummaryUnlabeledTelecommunicationsPortfolioAtbc</Role>
      <ContainEmbeddedReports>true</ContainEmbeddedReports>
      <XmlFileName>R362.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>004608 - Disclosure - Risk/Return Detail Data {Elements} - (Telecommunications Portfolio) (ATBC)</LongName>
      <ShortName>Risk/Return Detail Data  - (Telecommunications Portfolio) (ATBC)</ShortName>
      <Role>http://www.fidelity.com/role/DisclosureRiskReturnDetailDataElementsTelecommunicationsPortfolioAtbc</Role>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <XmlFileName>R369.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>004701 - Document - Risk/Return Summary {Unlabeled} - (Telecommunications Portfolio) (Inst)</LongName>
      <ShortName>Risk/Return Summary  - (Telecommunications Portfolio) (Inst)</ShortName>
      <Role>http://www.fidelity.com/role/DocumentRiskReturnSummaryUnlabeledTelecommunicationsPortfolioInst</Role>
      <ContainEmbeddedReports>true</ContainEmbeddedReports>
      <XmlFileName>R370.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>004708 - Disclosure - Risk/Return Detail Data {Elements} - (Telecommunications Portfolio) (Inst)</LongName>
      <ShortName>Risk/Return Detail Data  - (Telecommunications Portfolio) (Inst)</ShortName>
      <Role>http://www.fidelity.com/role/DisclosureRiskReturnDetailDataElementsTelecommunicationsPortfolioInst</Role>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <XmlFileName>R377.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>R378.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>295</ContextCount>
  <SegmentCount>143</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <UnitCount>2</UnitCount>
  <ElementCount>93</ElementCount>
  <FootnotesReported>true</FootnotesReported>
  <TuplesReported>false</TuplesReported>
  <ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007477Member_rr_PerformanceMeasureAxis_cik0000320351_SP500Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007489Member_rr_PerformanceMeasureAxis_cik0000320351_SPCustomWirelessIndexMember</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007492Member_rr_PerformanceMeasureAxis_cik0000320351_SP500Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007458Member</ContextName>
      <ElementCount>35</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007468Member_rr_PerformanceMeasureAxis_cik0000320351_MsciUSImCapitalGoods2550IndexMember</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007459Member_rr_PerformanceMeasureAxis_rr_AfterTaxesOnDistributionsMember_rr_ProspectusShareClassAxis_cik0000320351_C000020433Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007460Member_rr_PerformanceMeasureAxis_rr_AfterTaxesOnDistributionsAndSalesMember_rr_ProspectusShareClassAxis_cik0000320351_C000020434Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007481Member_rr_PerformanceMeasureAxis_cik0000320351_SP500Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_DocumentInformationDocumentAxis_cik0000320351_TBCMember_dei_LegalEntityAxis_cik0000320351_S000007465Member_rr_PerformanceMeasureAxis_cik0000320351_SP500Member</ContextName>
      <ElementCount>2</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007486Member_rr_ProspectusShareClassAxis_cik0000320351_C000020460Member</ContextName>
      <ElementCount>31</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007489Member_rr_ProspectusShareClassAxis_cik0000320351_C000020463Member</ContextName>
      <ElementCount>31</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007455Member_rr_ProspectusShareClassAxis_cik0000320351_C000020429Member</ContextName>
      <ElementCount>31</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007476Member_rr_PerformanceMeasureAxis_cik0000320351_MsciUSImMedia2550IndexMember</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_DocumentInformationDocumentAxis_cik0000320351_RetailMember_dei_LegalEntityAxis_cik0000320351_S000007469Member_rr_ProspectusShareClassAxis_cik0000320351_C000020443Member</ContextName>
      <ElementCount>31</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_DocumentInformationDocumentAxis_cik0000320351_TBCMember_dei_LegalEntityAxis_cik0000320351_S000007469Member_rr_ProspectusShareClassAxis_cik0000320351_C000040629Member</ContextName>
      <ElementCount>17</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007494Member_rr_PerformanceMeasureAxis_cik0000320351_SP500Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007458Member_rr_ProspectusShareClassAxis_cik0000320351_C000020432Member</ContextName>
      <ElementCount>31</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_DocumentInformationDocumentAxis_cik0000320351_TBCMember_dei_LegalEntityAxis_cik0000320351_S000007469Member_rr_PerformanceMeasureAxis_cik0000320351_MsciUSImMaterials2550IndexMember</ContextName>
      <ElementCount>2</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007488Member_rr_PerformanceMeasureAxis_rr_AfterTaxesOnDistributionsMember_rr_ProspectusShareClassAxis_cik0000320351_C000020462Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_DocumentInformationDocumentAxis_cik0000320351_InstMember_dei_LegalEntityAxis_cik0000320351_S000007463Member_rr_ProspectusShareClassAxis_cik0000320351_C000040620Member</ContextName>
      <ElementCount>24</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007484Member_rr_PerformanceMeasureAxis_rr_AfterTaxesOnDistributionsAndSalesMember_rr_ProspectusShareClassAxis_cik0000320351_C000020458Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007487Member_rr_PerformanceMeasureAxis_cik0000320351_SP500Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007462Member_rr_PerformanceMeasureAxis_cik0000320351_MsciUSImFinancials2550IndexMember</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_DocumentInformationDocumentAxis_cik0000320351_InstMember_dei_LegalEntityAxis_cik0000320351_S000007463Member_rr_PerformanceMeasureAxis_rr_AfterTaxesOnDistributionsAndSalesMember_rr_ProspectusShareClassAxis_cik0000320351_C000040620Member</ContextName>
      <ElementCount>2</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007486Member_rr_PerformanceMeasureAxis_rr_AfterTaxesOnDistributionsAndSalesMember_rr_ProspectusShareClassAxis_cik0000320351_C000020460Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_DocumentInformationDocumentAxis_cik0000320351_RetailMember_dei_LegalEntityAxis_cik0000320351_S000007465Member_rr_ProspectusShareClassAxis_cik0000320351_C000020439Member</ContextName>
      <ElementCount>34</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007457Member</ContextName>
      <ElementCount>35</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_DocumentInformationDocumentAxis_cik0000320351_RetailMember_dei_LegalEntityAxis_cik0000320351_S000007485Member_rr_PerformanceMeasureAxis_cik0000320351_MsciUSImTelecommunicationsServices2550IndexMember</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007475Member_rr_PerformanceMeasureAxis_rr_AfterTaxesOnDistributionsMember_rr_ProspectusShareClassAxis_cik0000320351_C000020449Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007466Member_rr_PerformanceMeasureAxis_rr_AfterTaxesOnDistributionsAndSalesMember_rr_ProspectusShareClassAxis_cik0000320351_C000020440Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007473Member_rr_ProspectusShareClassAxis_cik0000320351_C000020447Member</ContextName>
      <ElementCount>31</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_DocumentInformationDocumentAxis_cik0000320351_RetailMember_dei_LegalEntityAxis_cik0000320351_S000007485Member_rr_PerformanceMeasureAxis_cik0000320351_SP500Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_DocumentInformationDocumentAxis_cik0000320351_TBCMember_dei_LegalEntityAxis_cik0000320351_S000007465Member_rr_ProspectusShareClassAxis_cik0000320351_C000040625Member</ContextName>
      <ElementCount>20</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007490Member_rr_ProspectusShareClassAxis_cik0000320351_C000020464Member</ContextName>
      <ElementCount>31</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007476Member_rr_PerformanceMeasureAxis_rr_AfterTaxesOnDistributionsMember_rr_ProspectusShareClassAxis_cik0000320351_C000020450Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007455Member_rr_PerformanceMeasureAxis_rr_AfterTaxesOnDistributionsAndSalesMember_rr_ProspectusShareClassAxis_cik0000320351_C000020429Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_DocumentInformationDocumentAxis_cik0000320351_TBCMember_dei_LegalEntityAxis_cik0000320351_S000007485Member_rr_PerformanceMeasureAxis_rr_AfterTaxesOnDistributionsAndSalesMember_rr_ProspectusShareClassAxis_cik0000320351_C000040631Member</ContextName>
      <ElementCount>2</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007481Member_rr_ProspectusShareClassAxis_cik0000320351_C000020455Member</ContextName>
      <ElementCount>30</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007457Member_rr_ProspectusShareClassAxis_cik0000320351_C000020431Member</ContextName>
      <ElementCount>31</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007472Member_rr_PerformanceMeasureAxis_rr_AfterTaxesOnDistributionsAndSalesMember_rr_ProspectusShareClassAxis_cik0000320351_C000020446Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011</ContextName>
      <ElementCount>8</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007481Member_rr_PerformanceMeasureAxis_rr_AfterTaxesOnDistributionsMember_rr_ProspectusShareClassAxis_cik0000320351_C000020455Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007454Member_rr_PerformanceMeasureAxis_rr_AfterTaxesOnDistributionsMember_rr_ProspectusShareClassAxis_cik0000320351_C000020428Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007457Member_rr_PerformanceMeasureAxis_rr_AfterTaxesOnDistributionsAndSalesMember_rr_ProspectusShareClassAxis_cik0000320351_C000020431Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007475Member_rr_PerformanceMeasureAxis_cik0000320351_MsciUSImBanks2550IndexMember</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007472Member</ContextName>
      <ElementCount>35</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007492Member_rr_PerformanceMeasureAxis_cik0000320351_MsciUSImChemicals2550IndexMember</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_DocumentInformationDocumentAxis_cik0000320351_TBCMember_dei_LegalEntityAxis_cik0000320351_S000007485Member_rr_PerformanceMeasureAxis_cik0000320351_MsciUSImTelecommunicationsServices2550IndexMember</ContextName>
      <ElementCount>2</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_DocumentInformationDocumentAxis_cik0000320351_RetailMember_dei_LegalEntityAxis_cik0000320351_S000007463Member_rr_ProspectusShareClassAxis_cik0000320351_C000020437Member</ContextName>
      <ElementCount>31</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007456Member_rr_PerformanceMeasureAxis_cik0000320351_SP500Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007466Member_rr_PerformanceMeasureAxis_cik0000320351_SP500Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007476Member_rr_PerformanceMeasureAxis_cik0000320351_SP500Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007471Member_rr_PerformanceMeasureAxis_cik0000320351_SP500Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007455Member_rr_PerformanceMeasureAxis_cik0000320351_MsciUSImIndustrials2550IndexMember</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007473Member_rr_PerformanceMeasureAxis_rr_AfterTaxesOnDistributionsMember_rr_ProspectusShareClassAxis_cik0000320351_C000020447Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007459Member_rr_ProspectusShareClassAxis_cik0000320351_C000020433Member</ContextName>
      <ElementCount>31</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007457Member_rr_PerformanceMeasureAxis_rr_AfterTaxesOnDistributionsMember_rr_ProspectusShareClassAxis_cik0000320351_C000020431Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_DocumentInformationDocumentAxis_cik0000320351_TBCMember_dei_LegalEntityAxis_cik0000320351_S000007465Member_rr_PerformanceMeasureAxis_cik0000320351_SPGlobalBmiGoldCappedIndexMember</ContextName>
      <ElementCount>2</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007486Member</ContextName>
      <ElementCount>35</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_DocumentInformationDocumentAxis_cik0000320351_TBCMember_dei_LegalEntityAxis_cik0000320351_S000007469Member_rr_ProspectusShareClassAxis_cik0000320351_C000040628Member</ContextName>
      <ElementCount>17</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007477Member</ContextName>
      <ElementCount>35</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007475Member_rr_PerformanceMeasureAxis_rr_AfterTaxesOnDistributionsAndSalesMember_rr_ProspectusShareClassAxis_cik0000320351_C000020449Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007471Member_rr_PerformanceMeasureAxis_rr_AfterTaxesOnDistributionsAndSalesMember_rr_ProspectusShareClassAxis_cik0000320351_C000020445Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007493Member_rr_PerformanceMeasureAxis_rr_AfterTaxesOnDistributionsMember_rr_ProspectusShareClassAxis_cik0000320351_C000020467Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_DocumentInformationDocumentAxis_cik0000320351_RetailMember_dei_LegalEntityAxis_cik0000320351_S000007463Member_rr_PerformanceMeasureAxis_rr_AfterTaxesOnDistributionsMember_rr_ProspectusShareClassAxis_cik0000320351_C000020437Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007493Member_rr_PerformanceMeasureAxis_cik0000320351_SP500Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_DocumentInformationDocumentAxis_cik0000320351_InstMember_dei_LegalEntityAxis_cik0000320351_S000007485Member_rr_PerformanceMeasureAxis_cik0000320351_MsciUSImTelecommunicationsServices2550IndexMember</ContextName>
      <ElementCount>2</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_DocumentInformationDocumentAxis_cik0000320351_InstMember_dei_LegalEntityAxis_cik0000320351_S000007469Member_rr_PerformanceMeasureAxis_cik0000320351_SP500Member</ContextName>
      <ElementCount>2</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007478Member_rr_PerformanceMeasureAxis_cik0000320351_SP500Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007454Member_rr_PerformanceMeasureAxis_cik0000320351_SP500Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_DocumentInformationDocumentAxis_cik0000320351_TBCMember_dei_LegalEntityAxis_cik0000320351_S000007469Member_rr_ProspectusShareClassAxis_cik0000320351_C000040627Member</ContextName>
      <ElementCount>17</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007454Member</ContextName>
      <ElementCount>35</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007492Member_rr_PerformanceMeasureAxis_rr_AfterTaxesOnDistributionsMember_rr_ProspectusShareClassAxis_cik0000320351_C000020466Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007454Member_rr_ProspectusShareClassAxis_cik0000320351_C000020428Member</ContextName>
      <ElementCount>31</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007468Member</ContextName>
      <ElementCount>34</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007471Member</ContextName>
      <ElementCount>34</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007482Member_rr_PerformanceMeasureAxis_cik0000320351_MsciUSImRetailing2550IndexMember</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007457Member_rr_PerformanceMeasureAxis_cik0000320351_SPCustomCommunicationsEquipmentIndexMember</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007464Member</ContextName>
      <ElementCount>34</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007477Member_rr_PerformanceMeasureAxis_cik0000320351_SPCustomNaturalGasIndexMember</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007470Member_rr_PerformanceMeasureAxis_rr_AfterTaxesOnDistributionsMember_rr_ProspectusShareClassAxis_cik0000320351_C000020444Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_DocumentInformationDocumentAxis_cik0000320351_TBCMember_dei_LegalEntityAxis_cik0000320351_S000007485Member_rr_ProspectusShareClassAxis_cik0000320351_C000040634Member</ContextName>
      <ElementCount>17</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_DocumentInformationDocumentAxis_cik0000320351_TBCMember_dei_LegalEntityAxis_cik0000320351_S000007465Member_rr_ProspectusShareClassAxis_cik0000320351_C000040622Member</ContextName>
      <ElementCount>33</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007456Member_rr_PerformanceMeasureAxis_rr_AfterTaxesOnDistributionsAndSalesMember_rr_ProspectusShareClassAxis_cik0000320351_C000020430Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007487Member_rr_PerformanceMeasureAxis_rr_AfterTaxesOnDistributionsMember_rr_ProspectusShareClassAxis_cik0000320351_C000020461Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_DocumentInformationDocumentAxis_cik0000320351_RetailMember_dei_LegalEntityAxis_cik0000320351_S000007485Member_rr_PerformanceMeasureAxis_rr_AfterTaxesOnDistributionsAndSalesMember_rr_ProspectusShareClassAxis_cik0000320351_C000020459Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_DocumentInformationDocumentAxis_cik0000320351_InstMember_dei_LegalEntityAxis_cik0000320351_S000007469Member_rr_ProspectusShareClassAxis_cik0000320351_C000040630Member</ContextName>
      <ElementCount>24</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007494Member_rr_PerformanceMeasureAxis_rr_AfterTaxesOnDistributionsMember_rr_ProspectusShareClassAxis_cik0000320351_C000020468Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007468Member_rr_PerformanceMeasureAxis_rr_AfterTaxesOnDistributionsMember_rr_ProspectusShareClassAxis_cik0000320351_C000020442Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_DocumentInformationDocumentAxis_cik0000320351_TBCMember_dei_LegalEntityAxis_cik0000320351_S000007465Member</ContextName>
      <ElementCount>43</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007460Member_rr_PerformanceMeasureAxis_cik0000320351_MsciUSImEnergyEquipmentServices2550IndexMember</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007456Member_rr_ProspectusShareClassAxis_cik0000320351_C000020430Member</ContextName>
      <ElementCount>31</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007482Member_rr_PerformanceMeasureAxis_cik0000320351_SP500Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_DocumentInformationDocumentAxis_cik0000320351_InstMember_dei_LegalEntityAxis_cik0000320351_S000007465Member_rr_PerformanceMeasureAxis_cik0000320351_SPGlobalBmiGoldCappedIndexMember</ContextName>
      <ElementCount>2</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_DocumentInformationDocumentAxis_cik0000320351_InstMember_dei_LegalEntityAxis_cik0000320351_S000007465Member_rr_PerformanceMeasureAxis_rr_AfterTaxesOnDistributionsMember_rr_ProspectusShareClassAxis_cik0000320351_C000040621Member</ContextName>
      <ElementCount>2</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_DocumentInformationDocumentAxis_cik0000320351_InstMember_dei_LegalEntityAxis_cik0000320351_S000007485Member_rr_PerformanceMeasureAxis_rr_AfterTaxesOnDistributionsMember_rr_ProspectusShareClassAxis_cik0000320351_C000040635Member</ContextName>
      <ElementCount>2</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_DocumentInformationDocumentAxis_cik0000320351_InstMember_dei_LegalEntityAxis_cik0000320351_S000007463Member_rr_PerformanceMeasureAxis_cik0000320351_SP500Member</ContextName>
      <ElementCount>2</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007483Member_rr_PerformanceMeasureAxis_rr_AfterTaxesOnDistributionsMember_rr_ProspectusShareClassAxis_cik0000320351_C000020457Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007473Member_rr_PerformanceMeasureAxis_cik0000320351_MsciUSImHealthCareEquipmentSupplies2550IndexMember</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_DocumentInformationDocumentAxis_cik0000320351_TBCMember_dei_LegalEntityAxis_cik0000320351_S000007463Member_rr_ProspectusShareClassAxis_cik0000320351_C000040619Member</ContextName>
      <ElementCount>17</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_DocumentInformationDocumentAxis_cik0000320351_RetailMember_dei_LegalEntityAxis_cik0000320351_S000007485Member_rr_ProspectusShareClassAxis_cik0000320351_C000020459Member</ContextName>
      <ElementCount>31</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007491Member_rr_PerformanceMeasureAxis_rr_AfterTaxesOnDistributionsAndSalesMember_rr_ProspectusShareClassAxis_cik0000320351_C000020465Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007493Member_rr_ProspectusShareClassAxis_cik0000320351_C000020467Member</ContextName>
      <ElementCount>31</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007470Member</ContextName>
      <ElementCount>35</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007462Member_rr_PerformanceMeasureAxis_cik0000320351_SP500Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007458Member_rr_PerformanceMeasureAxis_rr_AfterTaxesOnDistributionsAndSalesMember_rr_ProspectusShareClassAxis_cik0000320351_C000020432Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007475Member</ContextName>
      <ElementCount>34</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_DocumentInformationDocumentAxis_cik0000320351_RetailMember_dei_LegalEntityAxis_cik0000320351_S000007465Member_rr_PerformanceMeasureAxis_rr_AfterTaxesOnDistributionsMember_rr_ProspectusShareClassAxis_cik0000320351_C000020439Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007493Member_rr_PerformanceMeasureAxis_rr_AfterTaxesOnDistributionsAndSalesMember_rr_ProspectusShareClassAxis_cik0000320351_C000020467Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007490Member_rr_PerformanceMeasureAxis_rr_AfterTaxesOnDistributionsMember_rr_ProspectusShareClassAxis_cik0000320351_C000020464Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_DocumentInformationDocumentAxis_cik0000320351_TBCMember_dei_LegalEntityAxis_cik0000320351_S000007463Member_rr_ProspectusShareClassAxis_cik0000320351_C000040618Member</ContextName>
      <ElementCount>17</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007456Member_rr_PerformanceMeasureAxis_rr_AfterTaxesOnDistributionsMember_rr_ProspectusShareClassAxis_cik0000320351_C000020430Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007492Member</ContextName>
      <ElementCount>34</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007475Member_rr_ProspectusShareClassAxis_cik0000320351_C000020449Member</ContextName>
      <ElementCount>31</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_DocumentInformationDocumentAxis_cik0000320351_RetailMember_dei_LegalEntityAxis_cik0000320351_S000007463Member_rr_PerformanceMeasureAxis_cik0000320351_SP500Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007464Member_rr_PerformanceMeasureAxis_cik0000320351_SP500Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007473Member_rr_PerformanceMeasureAxis_rr_AfterTaxesOnDistributionsAndSalesMember_rr_ProspectusShareClassAxis_cik0000320351_C000020447Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_DocumentInformationDocumentAxis_cik0000320351_TBCMember_dei_LegalEntityAxis_cik0000320351_S000007469Member_rr_PerformanceMeasureAxis_rr_AfterTaxesOnDistributionsAndSalesMember_rr_ProspectusShareClassAxis_cik0000320351_C000040626Member</ContextName>
      <ElementCount>2</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_DocumentInformationDocumentAxis_cik0000320351_TBCMember_dei_LegalEntityAxis_cik0000320351_S000007485Member_rr_PerformanceMeasureAxis_rr_AfterTaxesOnDistributionsMember_rr_ProspectusShareClassAxis_cik0000320351_C000040631Member</ContextName>
      <ElementCount>2</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_DocumentInformationDocumentAxis_cik0000320351_TBCMember_dei_LegalEntityAxis_cik0000320351_S000007485Member_rr_ProspectusShareClassAxis_cik0000320351_C000040632Member</ContextName>
      <ElementCount>17</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007476Member_rr_ProspectusShareClassAxis_cik0000320351_C000020450Member</ContextName>
      <ElementCount>31</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007461Member</ContextName>
      <ElementCount>34</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007486Member_rr_PerformanceMeasureAxis_cik0000320351_SP500Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007466Member</ContextName>
      <ElementCount>35</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007483Member_rr_ProspectusShareClassAxis_cik0000320351_C000020457Member</ContextName>
      <ElementCount>31</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_DocumentInformationDocumentAxis_cik0000320351_RetailMember_dei_LegalEntityAxis_cik0000320351_S000007465Member_rr_PerformanceMeasureAxis_cik0000320351_SP500Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007460Member_rr_PerformanceMeasureAxis_cik0000320351_SP500Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007478Member_rr_ProspectusShareClassAxis_cik0000320351_C000020452Member</ContextName>
      <ElementCount>31</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007466Member_rr_PerformanceMeasureAxis_rr_AfterTaxesOnDistributionsMember_rr_ProspectusShareClassAxis_cik0000320351_C000020440Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007467Member_rr_PerformanceMeasureAxis_rr_AfterTaxesOnDistributionsMember_rr_ProspectusShareClassAxis_cik0000320351_C000020441Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_DocumentInformationDocumentAxis_cik0000320351_InstMember_dei_LegalEntityAxis_cik0000320351_S000007465Member_rr_ProspectusShareClassAxis_cik0000320351_C000040621Member</ContextName>
      <ElementCount>27</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_DocumentInformationDocumentAxis_cik0000320351_RetailMember_dei_LegalEntityAxis_cik0000320351_S000007469Member</ContextName>
      <ElementCount>34</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_DocumentInformationDocumentAxis_cik0000320351_TBCMember_dei_LegalEntityAxis_cik0000320351_S000007465Member_rr_PerformanceMeasureAxis_rr_AfterTaxesOnDistributionsMember_rr_ProspectusShareClassAxis_cik0000320351_C000040622Member</ContextName>
      <ElementCount>2</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007487Member_rr_PerformanceMeasureAxis_rr_AfterTaxesOnDistributionsAndSalesMember_rr_ProspectusShareClassAxis_cik0000320351_C000020461Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007464Member_rr_PerformanceMeasureAxis_cik0000320351_SPCustomAutomobilesComponentsIndexMember</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007475Member_rr_PerformanceMeasureAxis_cik0000320351_SP500Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007493Member_rr_PerformanceMeasureAxis_cik0000320351_SPCustomComputersPeripheralsIndexMember</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007454Member_rr_PerformanceMeasureAxis_cik0000320351_MsciUSImConsumerDiscretionary2550IndexMember</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007468Member_rr_PerformanceMeasureAxis_cik0000320351_SP500Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007488Member_rr_PerformanceMeasureAxis_rr_AfterTaxesOnDistributionsAndSalesMember_rr_ProspectusShareClassAxis_cik0000320351_C000020462Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007467Member_rr_PerformanceMeasureAxis_rr_AfterTaxesOnDistributionsAndSalesMember_rr_ProspectusShareClassAxis_cik0000320351_C000020441Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_DocumentInformationDocumentAxis_cik0000320351_TBCMember_dei_LegalEntityAxis_cik0000320351_S000007463Member_rr_PerformanceMeasureAxis_rr_AfterTaxesOnDistributionsMember_rr_ProspectusShareClassAxis_cik0000320351_C000040616Member</ContextName>
      <ElementCount>2</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_DocumentInformationDocumentAxis_cik0000320351_InstMember_dei_LegalEntityAxis_cik0000320351_S000007465Member_rr_PerformanceMeasureAxis_cik0000320351_SP500Member</ContextName>
      <ElementCount>2</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_DocumentInformationDocumentAxis_cik0000320351_RetailMember_dei_LegalEntityAxis_cik0000320351_S000007463Member_rr_PerformanceMeasureAxis_cik0000320351_MsciUSImConsumerStaples2550IndexMember</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007489Member_rr_PerformanceMeasureAxis_cik0000320351_SP500Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007487Member</ContextName>
      <ElementCount>34</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007481Member_rr_PerformanceMeasureAxis_cik0000320351_SPCustomPharmaceuticalsIndexMember</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_DocumentInformationDocumentAxis_cik0000320351_TBCMember_dei_LegalEntityAxis_cik0000320351_S000007485Member</ContextName>
      <ElementCount>43</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007455Member_rr_PerformanceMeasureAxis_cik0000320351_SP500Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007482Member</ContextName>
      <ElementCount>34</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007482Member_rr_PerformanceMeasureAxis_rr_AfterTaxesOnDistributionsAndSalesMember_rr_ProspectusShareClassAxis_cik0000320351_C000020456Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007459Member_rr_PerformanceMeasureAxis_rr_AfterTaxesOnDistributionsAndSalesMember_rr_ProspectusShareClassAxis_cik0000320351_C000020433Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007462Member_rr_PerformanceMeasureAxis_rr_AfterTaxesOnDistributionsMember_rr_ProspectusShareClassAxis_cik0000320351_C000020436Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007491Member_rr_PerformanceMeasureAxis_cik0000320351_SP500Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007492Member_rr_ProspectusShareClassAxis_cik0000320351_C000020466Member</ContextName>
      <ElementCount>31</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_DocumentInformationDocumentAxis_cik0000320351_RetailMember_dei_LegalEntityAxis_cik0000320351_S000007485Member_rr_PerformanceMeasureAxis_rr_AfterTaxesOnDistributionsMember_rr_ProspectusShareClassAxis_cik0000320351_C000020459Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007481Member_rr_PerformanceMeasureAxis_rr_AfterTaxesOnDistributionsAndSalesMember_rr_ProspectusShareClassAxis_cik0000320351_C000020455Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_DocumentInformationDocumentAxis_cik0000320351_TBCMember_dei_LegalEntityAxis_cik0000320351_S000007469Member</ContextName>
      <ElementCount>43</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007466Member_rr_PerformanceMeasureAxis_cik0000320351_MsciUSImHealthCare2550IndexMember</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_DocumentInformationDocumentAxis_cik0000320351_RetailMember_dei_LegalEntityAxis_cik0000320351_S000007463Member_rr_PerformanceMeasureAxis_rr_AfterTaxesOnDistributionsAndSalesMember_rr_ProspectusShareClassAxis_cik0000320351_C000020437Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_DocumentInformationDocumentAxis_cik0000320351_RetailMember_dei_LegalEntityAxis_cik0000320351_S000007469Member_rr_PerformanceMeasureAxis_cik0000320351_MsciUSImMaterials2550IndexMember</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007488Member</ContextName>
      <ElementCount>35</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007487Member_rr_ProspectusShareClassAxis_cik0000320351_C000020461Member</ContextName>
      <ElementCount>31</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007477Member_rr_PerformanceMeasureAxis_rr_AfterTaxesOnDistributionsMember_rr_ProspectusShareClassAxis_cik0000320351_C000020451Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007473Member_rr_PerformanceMeasureAxis_cik0000320351_SP500Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_DocumentInformationDocumentAxis_cik0000320351_InstMember_dei_LegalEntityAxis_cik0000320351_S000007485Member_rr_ProspectusShareClassAxis_cik0000320351_C000040635Member</ContextName>
      <ElementCount>24</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_DocumentInformationDocumentAxis_cik0000320351_RetailMember_dei_LegalEntityAxis_cik0000320351_S000007465Member_rr_PerformanceMeasureAxis_rr_AfterTaxesOnDistributionsAndSalesMember_rr_ProspectusShareClassAxis_cik0000320351_C000020439Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007458Member_rr_PerformanceMeasureAxis_cik0000320351_MsciUSImSemiconductorsSemiconductorEquipment2550IndexMember</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007490Member_rr_PerformanceMeasureAxis_rr_AfterTaxesOnDistributionsAndSalesMember_rr_ProspectusShareClassAxis_cik0000320351_C000020464Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_DocumentInformationDocumentAxis_cik0000320351_TBCMember_dei_LegalEntityAxis_cik0000320351_S000007463Member</ContextName>
      <ElementCount>43</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_DocumentInformationDocumentAxis_cik0000320351_TBCMember_dei_LegalEntityAxis_cik0000320351_S000007469Member_rr_ProspectusShareClassAxis_cik0000320351_C000040626Member</ContextName>
      <ElementCount>30</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007453Member_rr_PerformanceMeasureAxis_rr_AfterTaxesOnDistributionsAndSalesMember_rr_ProspectusShareClassAxis_cik0000320351_C000020427Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007453Member_rr_PerformanceMeasureAxis_cik0000320351_SP500Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007494Member_rr_PerformanceMeasureAxis_rr_AfterTaxesOnDistributionsAndSalesMember_rr_ProspectusShareClassAxis_cik0000320351_C000020468Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007471Member_rr_PerformanceMeasureAxis_cik0000320351_MsciUSImConsumerServices2550IndexMember</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_DocumentInformationDocumentAxis_cik0000320351_RetailMember_dei_LegalEntityAxis_cik0000320351_S000007485Member</ContextName>
      <ElementCount>35</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007453Member_rr_PerformanceMeasureAxis_rr_AfterTaxesOnDistributionsMember_rr_ProspectusShareClassAxis_cik0000320351_C000020427Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007468Member_rr_PerformanceMeasureAxis_rr_AfterTaxesOnDistributionsAndSalesMember_rr_ProspectusShareClassAxis_cik0000320351_C000020442Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007477Member_rr_ProspectusShareClassAxis_cik0000320351_C000020451Member</ContextName>
      <ElementCount>31</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_DocumentInformationDocumentAxis_cik0000320351_InstMember_dei_LegalEntityAxis_cik0000320351_S000007463Member_rr_PerformanceMeasureAxis_rr_AfterTaxesOnDistributionsMember_rr_ProspectusShareClassAxis_cik0000320351_C000040620Member</ContextName>
      <ElementCount>2</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007461Member_rr_PerformanceMeasureAxis_rr_AfterTaxesOnDistributionsMember_rr_ProspectusShareClassAxis_cik0000320351_C000020435Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007467Member</ContextName>
      <ElementCount>35</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007467Member_rr_ProspectusShareClassAxis_cik0000320351_C000020441Member</ContextName>
      <ElementCount>31</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_DocumentInformationDocumentAxis_cik0000320351_TBCMember_dei_LegalEntityAxis_cik0000320351_S000007465Member_rr_PerformanceMeasureAxis_rr_AfterTaxesOnDistributionsAndSalesMember_rr_ProspectusShareClassAxis_cik0000320351_C000040622Member</ContextName>
      <ElementCount>2</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007478Member_rr_PerformanceMeasureAxis_rr_AfterTaxesOnDistributionsAndSalesMember_rr_ProspectusShareClassAxis_cik0000320351_C000020452Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007493Member</ContextName>
      <ElementCount>34</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007472Member_rr_PerformanceMeasureAxis_cik0000320351_MsciUSImHealthCareProvidersServices2550IndexMember</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007468Member_rr_ProspectusShareClassAxis_cik0000320351_C000020442Member</ContextName>
      <ElementCount>31</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007491Member_rr_PerformanceMeasureAxis_cik0000320351_MsciUSImItServices2550IndexMember</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007456Member</ContextName>
      <ElementCount>35</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007484Member_rr_PerformanceMeasureAxis_cik0000320351_MsciUSImInformationTechnology2550IndexMember</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007458Member_rr_PerformanceMeasureAxis_cik0000320351_SP500Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007461Member_rr_PerformanceMeasureAxis_cik0000320351_SP500Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007460Member_rr_ProspectusShareClassAxis_cik0000320351_C000020434Member</ContextName>
      <ElementCount>31</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007456Member_rr_PerformanceMeasureAxis_cik0000320351_MsciUSImAerospaceDefense2550IndexMember</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_DocumentInformationDocumentAxis_cik0000320351_RetailMember_dei_LegalEntityAxis_cik0000320351_S000007469Member_rr_PerformanceMeasureAxis_cik0000320351_SP500Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_DocumentInformationDocumentAxis_cik0000320351_InstMember_dei_LegalEntityAxis_cik0000320351_S000007463Member_rr_PerformanceMeasureAxis_cik0000320351_MsciUSImConsumerStaples2550IndexMember</ContextName>
      <ElementCount>2</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007488Member_rr_PerformanceMeasureAxis_cik0000320351_SP500Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007453Member</ContextName>
      <ElementCount>34</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007471Member_rr_PerformanceMeasureAxis_rr_AfterTaxesOnDistributionsMember_rr_ProspectusShareClassAxis_cik0000320351_C000020445Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007466Member_rr_ProspectusShareClassAxis_cik0000320351_C000020440Member</ContextName>
      <ElementCount>31</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_DocumentInformationDocumentAxis_cik0000320351_TBCMember_dei_LegalEntityAxis_cik0000320351_S000007469Member_rr_PerformanceMeasureAxis_rr_AfterTaxesOnDistributionsMember_rr_ProspectusShareClassAxis_cik0000320351_C000040626Member</ContextName>
      <ElementCount>2</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007488Member_rr_ProspectusShareClassAxis_cik0000320351_C000020462Member</ContextName>
      <ElementCount>31</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007494Member_rr_ProspectusShareClassAxis_cik0000320351_C000020468Member</ContextName>
      <ElementCount>31</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007459Member</ContextName>
      <ElementCount>34</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007484Member_rr_ProspectusShareClassAxis_cik0000320351_C000020458Member</ContextName>
      <ElementCount>31</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007489Member_rr_PerformanceMeasureAxis_rr_AfterTaxesOnDistributionsMember_rr_ProspectusShareClassAxis_cik0000320351_C000020463Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007473Member</ContextName>
      <ElementCount>34</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_DocumentInformationDocumentAxis_cik0000320351_TBCMember_dei_LegalEntityAxis_cik0000320351_S000007469Member_rr_PerformanceMeasureAxis_cik0000320351_SP500Member</ContextName>
      <ElementCount>2</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007464Member_rr_ProspectusShareClassAxis_cik0000320351_C000020438Member</ContextName>
      <ElementCount>31</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_DocumentInformationDocumentAxis_cik0000320351_TBCMember_dei_LegalEntityAxis_cik0000320351_S000007465Member_rr_ProspectusShareClassAxis_cik0000320351_C000040624Member</ContextName>
      <ElementCount>20</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007494Member_rr_PerformanceMeasureAxis_cik0000320351_MsciUSImCustomConstructionHousing2550IndexMember</ContextName>
      <ElementCount>2</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007467Member_rr_PerformanceMeasureAxis_cik0000320351_SP500Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007470Member_rr_PerformanceMeasureAxis_rr_AfterTaxesOnDistributionsAndSalesMember_rr_ProspectusShareClassAxis_cik0000320351_C000020444Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_DocumentInformationDocumentAxis_cik0000320351_RetailMember_dei_LegalEntityAxis_cik0000320351_S000007465Member_rr_PerformanceMeasureAxis_cik0000320351_SPGlobalBmiGoldCappedIndexMember</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007486Member_rr_PerformanceMeasureAxis_rr_AfterTaxesOnDistributionsMember_rr_ProspectusShareClassAxis_cik0000320351_C000020460Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007483Member_rr_PerformanceMeasureAxis_cik0000320351_MsciUSImSoftwareServices2550IndexMember</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007470Member_rr_PerformanceMeasureAxis_cik0000320351_MsciUSImInsurance2550IndexMember</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_DocumentInformationDocumentAxis_cik0000320351_InstMember_dei_LegalEntityAxis_cik0000320351_S000007469Member_rr_PerformanceMeasureAxis_rr_AfterTaxesOnDistributionsMember_rr_ProspectusShareClassAxis_cik0000320351_C000040630Member</ContextName>
      <ElementCount>2</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007483Member_rr_PerformanceMeasureAxis_cik0000320351_SP500Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_DocumentInformationDocumentAxis_cik0000320351_TBCMember_dei_LegalEntityAxis_cik0000320351_S000007485Member_rr_ProspectusShareClassAxis_cik0000320351_C000040633Member</ContextName>
      <ElementCount>17</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_DocumentInformationDocumentAxis_cik0000320351_InstMember_dei_LegalEntityAxis_cik0000320351_S000007469Member_rr_PerformanceMeasureAxis_rr_AfterTaxesOnDistributionsAndSalesMember_rr_ProspectusShareClassAxis_cik0000320351_C000040630Member</ContextName>
      <ElementCount>2</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007462Member_rr_PerformanceMeasureAxis_rr_AfterTaxesOnDistributionsAndSalesMember_rr_ProspectusShareClassAxis_cik0000320351_C000020436Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007470Member_rr_ProspectusShareClassAxis_cik0000320351_C000020444Member</ContextName>
      <ElementCount>31</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007460Member</ContextName>
      <ElementCount>34</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007494Member</ContextName>
      <ElementCount>35</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_DocumentInformationDocumentAxis_cik0000320351_TBCMember_dei_LegalEntityAxis_cik0000320351_S000007485Member_rr_PerformanceMeasureAxis_cik0000320351_SP500Member</ContextName>
      <ElementCount>2</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007487Member_rr_PerformanceMeasureAxis_cik0000320351_MsciUSImTransportation2550IndexMember</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007471Member_rr_ProspectusShareClassAxis_cik0000320351_C000020445Member</ContextName>
      <ElementCount>31</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007478Member_rr_PerformanceMeasureAxis_rr_AfterTaxesOnDistributionsMember_rr_ProspectusShareClassAxis_cik0000320351_C000020452Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007491Member_rr_ProspectusShareClassAxis_cik0000320351_C000020465Member</ContextName>
      <ElementCount>31</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_DocumentInformationDocumentAxis_cik0000320351_RetailMember_dei_LegalEntityAxis_cik0000320351_S000007469Member_rr_PerformanceMeasureAxis_rr_AfterTaxesOnDistributionsMember_rr_ProspectusShareClassAxis_cik0000320351_C000020443Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007484Member</ContextName>
      <ElementCount>34</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007492Member_rr_PerformanceMeasureAxis_rr_AfterTaxesOnDistributionsAndSalesMember_rr_ProspectusShareClassAxis_cik0000320351_C000020466Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007462Member_rr_ProspectusShareClassAxis_cik0000320351_C000020436Member</ContextName>
      <ElementCount>31</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007472Member_rr_PerformanceMeasureAxis_rr_AfterTaxesOnDistributionsMember_rr_ProspectusShareClassAxis_cik0000320351_C000020446Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007464Member_rr_PerformanceMeasureAxis_rr_AfterTaxesOnDistributionsMember_rr_ProspectusShareClassAxis_cik0000320351_C000020438Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_DocumentInformationDocumentAxis_cik0000320351_RetailMember_dei_LegalEntityAxis_cik0000320351_S000007463Member</ContextName>
      <ElementCount>34</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007489Member_rr_PerformanceMeasureAxis_rr_AfterTaxesOnDistributionsAndSalesMember_rr_ProspectusShareClassAxis_cik0000320351_C000020463Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007484Member_rr_PerformanceMeasureAxis_rr_AfterTaxesOnDistributionsMember_rr_ProspectusShareClassAxis_cik0000320351_C000020458Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_DocumentInformationDocumentAxis_cik0000320351_InstMember_dei_LegalEntityAxis_cik0000320351_S000007469Member_rr_PerformanceMeasureAxis_cik0000320351_MsciUSImMaterials2550IndexMember</ContextName>
      <ElementCount>2</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007476Member_rr_PerformanceMeasureAxis_rr_AfterTaxesOnDistributionsAndSalesMember_rr_ProspectusShareClassAxis_cik0000320351_C000020450Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007482Member_rr_PerformanceMeasureAxis_rr_AfterTaxesOnDistributionsMember_rr_ProspectusShareClassAxis_cik0000320351_C000020456Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007478Member_rr_PerformanceMeasureAxis_cik0000320351_SPNorthAmericanNaturalResourcesSectorIndexMember</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_DocumentInformationDocumentAxis_cik0000320351_InstMember_dei_LegalEntityAxis_cik0000320351_S000007465Member</ContextName>
      <ElementCount>34</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_DocumentInformationDocumentAxis_cik0000320351_TBCMember_dei_LegalEntityAxis_cik0000320351_S000007463Member_rr_PerformanceMeasureAxis_rr_AfterTaxesOnDistributionsAndSalesMember_rr_ProspectusShareClassAxis_cik0000320351_C000040616Member</ContextName>
      <ElementCount>2</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007459Member_rr_PerformanceMeasureAxis_cik0000320351_SP500Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007464Member_rr_PerformanceMeasureAxis_rr_AfterTaxesOnDistributionsAndSalesMember_rr_ProspectusShareClassAxis_cik0000320351_C000020438Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007455Member_rr_PerformanceMeasureAxis_rr_AfterTaxesOnDistributionsMember_rr_ProspectusShareClassAxis_cik0000320351_C000020429Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007453Member_rr_PerformanceMeasureAxis_cik0000320351_SPCustomAirTransportationIndexMember</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007462Member</ContextName>
      <ElementCount>34</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007461Member_rr_ProspectusShareClassAxis_cik0000320351_C000020435Member</ContextName>
      <ElementCount>31</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007488Member_rr_PerformanceMeasureAxis_cik0000320351_MsciUSImUtilities2550IndexMember</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_DocumentInformationDocumentAxis_cik0000320351_TBCMember_dei_LegalEntityAxis_cik0000320351_S000007463Member_rr_PerformanceMeasureAxis_cik0000320351_SP500Member</ContextName>
      <ElementCount>2</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007470Member_rr_PerformanceMeasureAxis_cik0000320351_SP500Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007458Member_rr_PerformanceMeasureAxis_rr_AfterTaxesOnDistributionsMember_rr_ProspectusShareClassAxis_cik0000320351_C000020432Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_DocumentInformationDocumentAxis_cik0000320351_RetailMember_dei_LegalEntityAxis_cik0000320351_S000007469Member_rr_PerformanceMeasureAxis_rr_AfterTaxesOnDistributionsAndSalesMember_rr_ProspectusShareClassAxis_cik0000320351_C000020443Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007482Member_rr_ProspectusShareClassAxis_cik0000320351_C000020456Member</ContextName>
      <ElementCount>31</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007455Member</ContextName>
      <ElementCount>34</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007489Member</ContextName>
      <ElementCount>35</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007490Member_rr_PerformanceMeasureAxis_cik0000320351_MsciUSImCapitalMarkets2550IndexMember</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007454Member_rr_PerformanceMeasureAxis_rr_AfterTaxesOnDistributionsAndSalesMember_rr_ProspectusShareClassAxis_cik0000320351_C000020428Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007472Member_rr_PerformanceMeasureAxis_cik0000320351_SP500Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007484Member_rr_PerformanceMeasureAxis_cik0000320351_SP500Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007459Member_rr_PerformanceMeasureAxis_cik0000320351_MsciUSImEnergy2550IndexMember</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_DocumentInformationDocumentAxis_cik0000320351_InstMember_dei_LegalEntityAxis_cik0000320351_S000007485Member_rr_PerformanceMeasureAxis_cik0000320351_SP500Member</ContextName>
      <ElementCount>2</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_DocumentInformationDocumentAxis_cik0000320351_RetailMember_dei_LegalEntityAxis_cik0000320351_S000007465Member</ContextName>
      <ElementCount>34</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007461Member_rr_PerformanceMeasureAxis_cik0000320351_FtseEnvironmentalOpportunitiesAlternativeEnergyIndexMember</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007467Member_rr_PerformanceMeasureAxis_cik0000320351_SPConsumerFinanceIndexMember</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007472Member_rr_ProspectusShareClassAxis_cik0000320351_C000020446Member</ContextName>
      <ElementCount>31</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007460Member_rr_PerformanceMeasureAxis_rr_AfterTaxesOnDistributionsMember_rr_ProspectusShareClassAxis_cik0000320351_C000020434Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007457Member_rr_PerformanceMeasureAxis_cik0000320351_SP500Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007490Member</ContextName>
      <ElementCount>35</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_DocumentInformationDocumentAxis_cik0000320351_InstMember_dei_LegalEntityAxis_cik0000320351_S000007465Member_rr_PerformanceMeasureAxis_rr_AfterTaxesOnDistributionsAndSalesMember_rr_ProspectusShareClassAxis_cik0000320351_C000040621Member</ContextName>
      <ElementCount>2</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007453Member_rr_ProspectusShareClassAxis_cik0000320351_C000020427Member</ContextName>
      <ElementCount>31</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007486Member_rr_PerformanceMeasureAxis_cik0000320351_MsciUSImBiotechnology2550IndexMember</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007490Member_rr_PerformanceMeasureAxis_cik0000320351_SP500Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007481Member</ContextName>
      <ElementCount>34</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007483Member</ContextName>
      <ElementCount>34</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007483Member_rr_PerformanceMeasureAxis_rr_AfterTaxesOnDistributionsAndSalesMember_rr_ProspectusShareClassAxis_cik0000320351_C000020457Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_DocumentInformationDocumentAxis_cik0000320351_TBCMember_dei_LegalEntityAxis_cik0000320351_S000007463Member_rr_PerformanceMeasureAxis_cik0000320351_MsciUSImConsumerStaples2550IndexMember</ContextName>
      <ElementCount>2</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_DocumentInformationDocumentAxis_cik0000320351_InstMember_dei_LegalEntityAxis_cik0000320351_S000007463Member</ContextName>
      <ElementCount>34</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_DocumentInformationDocumentAxis_cik0000320351_InstMember_dei_LegalEntityAxis_cik0000320351_S000007485Member</ContextName>
      <ElementCount>35</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007461Member_rr_PerformanceMeasureAxis_rr_AfterTaxesOnDistributionsAndSalesMember_rr_ProspectusShareClassAxis_cik0000320351_C000020435Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_DocumentInformationDocumentAxis_cik0000320351_TBCMember_dei_LegalEntityAxis_cik0000320351_S000007465Member_rr_ProspectusShareClassAxis_cik0000320351_C000040623Member</ContextName>
      <ElementCount>20</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_DocumentInformationDocumentAxis_cik0000320351_InstMember_dei_LegalEntityAxis_cik0000320351_S000007469Member</ContextName>
      <ElementCount>34</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007478Member</ContextName>
      <ElementCount>33</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_DocumentInformationDocumentAxis_cik0000320351_TBCMember_dei_LegalEntityAxis_cik0000320351_S000007463Member_rr_ProspectusShareClassAxis_cik0000320351_C000040617Member</ContextName>
      <ElementCount>17</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_DocumentInformationDocumentAxis_cik0000320351_InstMember_dei_LegalEntityAxis_cik0000320351_S000007485Member_rr_PerformanceMeasureAxis_rr_AfterTaxesOnDistributionsAndSalesMember_rr_ProspectusShareClassAxis_cik0000320351_C000040635Member</ContextName>
      <ElementCount>2</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007476Member</ContextName>
      <ElementCount>35</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007477Member_rr_PerformanceMeasureAxis_rr_AfterTaxesOnDistributionsAndSalesMember_rr_ProspectusShareClassAxis_cik0000320351_C000020451Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_DocumentInformationDocumentAxis_cik0000320351_TBCMember_dei_LegalEntityAxis_cik0000320351_S000007463Member_rr_ProspectusShareClassAxis_cik0000320351_C000040616Member</ContextName>
      <ElementCount>30</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_DocumentInformationDocumentAxis_cik0000320351_TBCMember_dei_LegalEntityAxis_cik0000320351_S000007485Member_rr_ProspectusShareClassAxis_cik0000320351_C000040631Member</ContextName>
      <ElementCount>30</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007491Member_rr_PerformanceMeasureAxis_rr_AfterTaxesOnDistributionsMember_rr_ProspectusShareClassAxis_cik0000320351_C000020465Member</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_29_2011_To_4_29_2011_dei_LegalEntityAxis_cik0000320351_S000007491Member</ContextName>
      <ElementCount>34</ElementCount>
    </ContextSummary>
  </ContextSummary>
  <BaseTaxonomies />
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
