3.22.2.2 html 2 10 1 false 1 0 false 2 false false R1.htm 000000 - Document - Document and Entity Information {Elements} Sheet http://www.russell.com/role/DocumentDocumentandEntityInformationElements Document and Entity Information 1 false false R2.htm 000011 - Disclosure - Risk/Return Detail Data {Elements} - U.S. Strategic Equity Fund Sheet http://www.russell.com/role/DisclosureRiskReturnDetailDataElementsUSStrategicEquityFund Risk/Return Detail Data- U.S. Strategic Equity Fund 2 false false All Reports Book All Reports [dq-0541-Series-Id-Member-Not-Declared] Submission type 497 should have S000006864Member declared as a domainItemType element. rif-20220907.xsd [dq-0541-Series-Id-Member-Not-Declared] Submission type 497 should have S000006865Member declared as a domainItemType element. rif-20220907.xsd [dq-0541-Series-Id-Member-Not-Declared] Submission type 497 should have S000006866Member declared as a domainItemType element. rif-20220907.xsd [dq-0541-Series-Id-Member-Not-Declared] Submission type 497 should have S000006867Member declared as a domainItemType element. rif-20220907.xsd [dq-0541-Series-Id-Member-Not-Declared] Submission type 497 should have S000017037Member declared as a domainItemType element. rif-20220907.xsd [dq-0541-Series-Id-Member-Not-Declared] Submission type 497 should have S000017038Member declared as a domainItemType element. rif-20220907.xsd [dq-0541-Series-Id-Member-Not-Declared] Submission type 497 should have S000017039Member declared as a domainItemType element. rif-20220907.xsd [dq-0541-Series-Id-Member-Not-Declared] Submission type 497 should have S000017040Member declared as a domainItemType element. rif-20220907.xsd d349466d497.htm rif-20220907.xsd rif-20220907_def.xml rif-20220907_lab.xml rif-20220907_pre.xml http://xbrl.sec.gov/dei/2021 http://xbrl.sec.gov/rr/2021 true false