Average Annual Return, Caption Average Annual Return, Caption Strategy Narrative [Text Block] Strategy Narrative [Text Block] Share Classes Share Classes Style Risk Member Style Risk Member Style Risk Member Performance Additional Market Index [Text] Performance Additional Market Index [Text] Annual Return, Inception Date Annual Return, Inception Date Annual Return 2005 Annual Return 2005 Expense Example by Year [Heading] Expense Example by Year [Heading] Annual Return 2006 Annual Return 2006 Annual Return 2003 Annual Return 2003 Annual Return 2004 Annual Return 2004 Annual Return 2009 Annual Return 2009 Document Effective Date Document Effective Date Annual Return 2007 Annual Return 2007 Affiliated Funds And Other Significant Investors Risk Member Affiliated Funds And Other Significant Investors Risk Member Affiliated Funds And Other Significant Investors Risk Member Annual Return 2008 Annual Return 2008 Performance Table Footnotes, Reason Performance Information for Class Different from Immediately Preceding Period [Text] Performance Table Footnotes, Reason Performance Information for Class Different from Immediately Preceding Period [Text] Objective, Primary [Text Block] Objective, Primary [Text Block] Performance Table Heading Performance Table Heading Portfolio Turnover [Heading] Portfolio Turnover [Heading] Expense Example, No Redemption, By Year, Caption [Text] Expense Example, No Redemption, By Year, Caption [Text] Component1 Other Expenses Component1 Other Expenses Risk Money Market Fund Sponsor May Not Provide Support [Member] Risk Money Market Fund Sponsor May Not Provide Support [Member] Maximum Account Fee Maximum Account Fee Shareholder Fee, Other Shareholder Fee, Other Expenses Range of Exchange Fees [Text Block] Expenses Range of Exchange Fees [Text Block] After Taxes on Distributions After Taxes on Distributions Annual Return 2001 Annual Return 2001 Highest Quarterly Return Highest Quarterly Return Annual Return 2002 Annual Return 2002 Annual Return 2000 Annual Return 2000 Annual Return 2016 Annual Return 2016 Coregistrant [Axis] Coregistrant [Axis] Annual Return 2017 Annual Return 2017 Annual Return 2014 Annual Return 2014 Annual Return 2015 Annual Return 2015 Expense Example by, Year, Caption [Text] Expense Example by, Year, Caption [Text] Annual Return 2018 Annual Return 2018 Annual Return 2019 Annual Return 2019 Management Fees (as a percentage of Assets) Management Fees (as a percentage of Assets) Performance Table Does Reflect Sales Loads Performance Table Does Reflect Sales Loads Annual Return 2012 Annual Return 2012 Shareholder Fees Column [Text] Shareholder Fees Column [Text] Annual Return 2013 Annual Return 2013 Fee Waiver or Reimbursement over Assets, Date of Termination Fee Waiver or Reimbursement over Assets, Date of Termination Exchange Fee Exchange Fee Bar Chart, Year to Date Return, Date Bar Chart, Year to Date Return, Date Annual Return 2010 Annual Return 2010 Annual Return 2011 Annual Return 2011 Annual Return 2025 Annual Return 2025 Trading Symbol Trading Symbol Risk Footnotes [Text Block] Risk Footnotes [Text Block] Risk Nondiversified Status [Member] Risk Nondiversified Status [Member] Risk Money Market Fund May Impose Fees or Suspend Sales [Text] Risk Money Market Fund May Impose Fees or Suspend Sales [Text] (Deprecated 2023-01-31) Document Creation Date Document Creation Date Operating Expenses Column [Text] Operating Expenses Column [Text] Maximum Deferred Sales Charge (as a percentage) Maximum Deferred Sales Charge (as a percentage) Document [Axis] Document [Axis] Bar Chart, Returns for Class Not Offered in Prospectus [Text] Bar Chart, Returns for Class Not Offered in Prospectus [Text] MSCI All Country World Index Investable Market Index (reflects no deduction for fees, expenses and taxes) MSCI All Country World Index Investable Market Index (reflects no deduction for fees, expenses and taxes) MSCI All Country World Index Investable Market Index (reflects no deduction for fees, expenses and taxes) Coregistrant [Domain] Coregistrant [Domain] Annual Return 2020 Annual Return 2020 Active Management Risk Member Active Management Risk Member Active Management Risk Member Inception Date Inception Date Annual Return 2023 Annual Return 2023 Annual Return 2024 Annual Return 2024 Average Annual Return, Column Name Average Annual Return, Column Name Annual Return 2021 Annual Return 2021 Performance Table Footnotes Performance Table Footnotes Annual Return 2022 Annual Return 2022 Bar Chart Footnotes [Text Block] Bar Chart Footnotes [Text Block] Redemption Fee Redemption Fee Maximum Cumulative Sales Charge (as a percentage) Maximum Cumulative Sales Charge (as a percentage) Emerging Markets Risk Member Emerging Markets Risk Member Emerging Markets Risk Member Lowest Quarterly Return, Label Lowest Quarterly Return, Label Bloomberg Global Aggregate Bond Index (Hedged) (reflects no deduction for fees, expenses or taxes) Bloomberg Global Aggregate Bond Index (Hedged) (reflects no deduction for fees, expenses or taxes) Bloomberg Global Aggregate Bond Index (Hedged) (reflects no deduction for fees, expenses or taxes) Before Taxes Before Taxes Risk Nondiversified Status [Text] Risk Nondiversified Status [Text] (Deprecated 2023-01-31) Risk Closing [Text Block] Risk Closing [Text Block] Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) Strategy Portfolio Concentration [Text] Strategy Portfolio Concentration [Text] Annual Return 1994 Annual Return 1994 Annual Return 1995 Annual Return 1995 Annual Return 1992 Annual Return 1992 Annual Return 1993 Annual Return 1993 Equity Securities Risk Member Equity Securities Risk Member Equity Securities Risk Member Annual Return 1998 Annual Return 1998 Expenses Other Expenses Had Extraordinary Expenses Been Included [Text] Expenses Other Expenses Had Extraordinary Expenses Been Included [Text] Annual Return 1999 Annual Return 1999 Annual Return 1996 Annual Return 1996 Risk Money Market Fund May Not Preserve Dollar [Member] Risk Money Market Fund May Not Preserve Dollar [Member] Annual Return 1997 Annual Return 1997 Expenses Restated to Reflect Current [Text] Expenses Restated to Reflect Current [Text] Bar Chart Closing [Text Block] Bar Chart Closing [Text Block] Thirty Day Yield Column [Text] Thirty Day Yield Column [Text] Acquired Fund Fees and Expenses Acquired Fund Fees and Expenses Risk/Return [Heading] Risk/Return [Heading] Risk Not Insured Depository Institution [Text] Risk Not Insured Depository Institution [Text] (Deprecated 2023-01-31) Thirty Day Yield Caption Thirty Day Yield Caption Money Market Seven Day Yield Money Market Seven Day Yield Wilshire Global Allocation Fund Wilshire Global Allocation Fund Wilshire Global Allocation Fund, S000001038 Annual Return 1990 Annual Return 1990 Annual Return 1991 Annual Return 1991 Distribution or Similar (Non 12b-1) Fees Distribution or Similar (Non 12b-1) Fees Risk Caption Risk Caption Risk Money Market Fund Sponsor May Not Provide Support [Text] Risk Money Market Fund Sponsor May Not Provide Support [Text] (Deprecated 2023-01-31) Component3 Other Expenses Component3 Other Expenses Other Expenses, New Fund, Based on Estimates [Text] Other Expenses, New Fund, Based on Estimates [Text] Expense Breakpoint Discounts [Text] Expense Breakpoint Discounts [Text] Market Risk Member Market Risk Member Market Risk Member Index No Deduction for Fees, Expenses, Taxes [Text] Index No Deduction for Fees, Expenses, Taxes [Text] Expenses Represent Both Master and Feeder [Text] Expenses Represent Both Master and Feeder [Text] Maximum Deferred Sales Charge (as a percentage of Offering Price) Maximum Deferred Sales Charge (as a percentage of Offering Price) Annual Return, Column [Text] Annual Return, Column [Text] Performance Past Does Not Indicate Future [Text] Performance Past Does Not Indicate Future [Text] Risk Money Market Fund May Not Preserve Dollar [Text] Risk Money Market Fund May Not Preserve Dollar [Text] (Deprecated 2023-01-31) Exchange Fee (as a percentage of Amount Redeemed) Exchange Fee (as a percentage of Amount Redeemed) Fund Of Funds Risk Member Fund Of Funds Risk Member Fund Of Funds Risk Member Share Class [Axis] Share Class [Axis] Performance Table Closing [Text Block] Performance Table Closing [Text Block] Small-Cap Company Risk Member Small-Cap Company Risk Member Small-Cap Company Risk Member Operating Expenses Caption [Text] Operating Expenses Caption [Text] Maximum Account Fee (as a percentage of Assets) Maximum Account Fee (as a percentage of Assets) Performance Narrative [Text Block] Performance Narrative [Text Block] Money Market Seven Day Yield, Caption [Text] Money Market Seven Day Yield, Caption [Text] Performance Table Market Index Changed Performance Table Market Index Changed Entity Inv Company Type Entity Inv Company Type Expense Example, No Redemption, 10 Years Expense Example, No Redemption, 10 Years Thirty Day Tax Equivalent Yield Thirty Day Tax Equivalent Yield Redemption Fee (as a percentage of Amount Redeemed) Redemption Fee (as a percentage of Amount Redeemed) 1 Year 1 Year Lowest Quarterly Return Lowest Quarterly Return Expense Example, No Redemption, 5 Years Expense Example, No Redemption, 5 Years 5 Years 5 Years Thirty Day Yield Thirty Day Yield Foreign Securities Risk Member Foreign Securities Risk Member Foreign Securities Risk Member Prospectus Prospectus Other Expenses (as a percentage of Assets): Other Expenses (as a percentage of Assets): Risk Narrative [Text Block] Risk [Text Block] After Taxes on Distributions and Sales After Taxes on Distributions and Sales Expense Narrative [Text Block] Expense Narrative [Text Block] Prospectus [Line Items] Prospectus [Line Items] Performance Measure [Axis] Performance Measure [Axis] Maximum Cumulative Sales Charge (as a percentage of Offering Price) Maximum Cumulative Sales Charge (as a percentage of Offering Price) Sector Risk Sector Risk Member Sector Risk Member Risk Money Market Fund May Impose Fees or Suspend Sales [Member] Risk Money Market Fund May Impose Fees or Suspend Sales [Member] Component2 Other Expenses Component2 Other Expenses 10 Years 10 Years Document Type Document Type Risk Not Insured Depository Institution [Member] Risk Not Insured Depository Institution [Member] Strategy [Heading] Strategy [Heading] Large-Cap Company Risk Member Large-Cap Company Risk Member Large-Cap Company Risk Member Registrant Name Registrant Name Bar Chart Does Not Reflect Sales Loads [Text] Bar Chart Does Not Reflect Sales Loads [Text] Net Expenses (as a percentage of Assets) Net Expenses (as a percentage of Assets) Risk Lose Money [Member] Risk Lose Money [Member] Performance Table Not Relevant to Tax Deferred Performance Table Not Relevant to Tax Deferred RIsk Not Insured [Text] Risk Not Insured [Text] (Deprecated 2023-01-31) Distribution and Service (12b-1) Fees Distribution and Service (12b-1) Fees Document Period End Date Document Period End Date Performance Information Illustrates Variability of Returns [Text] Performance Information Illustrates Variability of Returns [Text] Expense Example, with Redemption, 5 Years Expense Example, with Redemption, 5 Years Entity Central Index Key Entity Central Index Key Expense Example, with Redemption, 3 Years Expense Example, with Redemption, 3 Years Expense Example, with Redemption, 1 Year Expense Example, with Redemption, 1 Year Expenses Deferred Charges [Text Block] Expenses Deferred Charges [Text Block] Risk [Axis] Risk [Axis] Portfolio Turnover [Text Block] Portfolio Turnover [Text Block] Portfolio Turnover, Rate Portfolio Turnover, Rate Year to Date Return, Label Year to Date Return, Label Expense Example Narrative [Text Block] Expense Example Narrative [Text Block] Risk Money Market Fund Price Fluctuates [Text] Risk Money Market Fund Price Fluctuates [Text] (Deprecated 2023-01-31) Expense Example, with Redemption, 10 Years Expense Example, with Redemption, 10 Years All Risks [Member] All Risks [Member] Series Series Amendment Flag Amendment Flag Money Market Seven Day Yield Phone Money Market Seven Day Yield Phone Acquired Fund Fees and Expenses, Based on Estimates [Text] Acquired Fund Fees and Expenses, Based on Estimates [Text] Series [Axis] Series [Axis] Expense Example [Heading] Expense Example [Heading] Wilshire Global Allocation Fund Wilshire Global Allocation Fund, class Wilshire Global Allocation Fund, C000002798 Risk [Heading] Risk [Heading] Expense Example, No Redemption Narrative [Text Block] Expense Example, No Redemption Narrative [Text Block] Thirty Day Yield Phone Thirty Day Yield Phone Performance Table Uses Highest Federal Rate Performance Table Uses Highest Federal Rate Money Market Seven Day Yield Column [Text] Money Market Seven Day Yield Column [Text] Bar Chart and Performance Table [Heading] Bar Chart and Performance Table [Heading] Shareholder Fees Caption [Text] Shareholder Fees Caption [Text] Risk Not Insured [Member] Risk Not Insured [Member] Expense Footnotes [Text Block] Expense Footnotes [Text Block] Performance Table One Class of after Tax Shown [Text] Performance Table One Class of after Tax Shown [Text] Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage) Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage) Money Market Seven Day Tax Equivalent Yield Money Market Seven Day Tax Equivalent Yield Fee Waiver or Reimbursement Fee Waiver or Reimbursement Risk Money Market Fund Price Fluctuates [Member] Risk Money Market Fund Price Fluctuates [Member] Risk [Text] Risk [Text] (Deprecated 2023-01-31) Fixed-Income Securities Risk Member Fixed-Income Securities Risk Member Fixed-Income Securities Risk Member Prospectus Date Prospectus Date Expenses (as a percentage of Assets) Expenses (as a percentage of Assets) Bar Chart, Reason Selected Class Different from Immediately Preceding Period [Text] Bar Chart, Reason Selected Class Different from Immediately Preceding Period [Text] Expense Example Footnotes [Text Block] Expense Example Footnotes [Text Block] Lowest Quarterly Return, Date Lowest Quarterly Return, Date Prospectus: Prospectus: Legal Entity Identifier Legal Entity Identifier Asset Allocation Risk Member Asset Allocation Risk Member Asset Allocation Risk Member Risk/Return: Risk/Return: Performance Table Narrative Performance Table Narrative Highest Quarterly Return, Date Highest Quarterly Return, Date Amendment Description Amendment Description Supplement to Prospectus [Text Block] Supplement to Prospectus [Text Block] Expenses Explanation of Nonrecurring Account Fee [Text] Expenses Explanation of Nonrecurring Account Fee [Text] Performance Availability Phone [Text] Performance Availability Phone [Text] Bar Chart, Year to Date Return Bar Chart, Year to Date Return Expense [Heading] Expense [Heading] Since Inception Since Inception Stock/Bond Composite (reflects no deduction for fees, expenses or taxes) Stock/Bond Composite (reflects no deduction for fees, expenses or taxes) Stock/Bond Composite (reflects no deduction for fees, expenses or taxes) Annual Return Caption [Text] Annual Return Caption [Text] Performance One Year or Less [Text] Performance One Year or Less [Text] Objective [Heading] Objective [Heading] Performance Table Explanation after Tax Higher Performance Table Explanation after Tax Higher Risk Column [Text] Risk Column [Text] Risk Lose Money [Text] Risk Lose Money [Text] (Deprecated 2023-01-31) Expense Breakpoint, Minimum Investment Required [Amount] Expense Breakpoint, Minimum Investment Required [Amount] Expense Example, No Redemption, 3 Years Expense Example, No Redemption, 3 Years Expense Example, No Redemption, 1 Year Expense Example, No Redemption, 1 Year Bar Chart Narrative [Text Block] Bar Chart Narrative [Text Block] Highest Quarterly Return, Label Highest Quarterly Return, Label Label Label Performance Availability Website Address [Text] Performance Availability Website Address [Text] Objective, Secondary [Text Block] Objective, Secondary [Text Block] Expenses Not Correlated to Ratio Due to Acquired Fund Fees [Text] Expenses Not Correlated to Ratio Due to Acquired Fund Fees [Text] Bar Chart [Heading] Bar Chart [Heading] Expense Example Closing [Text Block] Expense Example Closing [Text Block]