v3.26.3
Investment Objectives and Goals
Sep. 29, 2026
GMO Benchmark-Free Allocation Fund | GMO Benchmark-Free Allocation Fund  
Prospectus [Line Items]  
Risk/Return [Heading] ​  GMO BENCHMARK-FREE ALLOCATION FUND   ​
Objective [Heading] Investment objective
Objective, Primary [Text Block]
Positive total return.
GMO Global Asset Allocation Fund | GMO Global Asset Allocation Fund  
Prospectus [Line Items]  
Risk/Return [Heading] ​  GMO GLOBAL ASSET ALLOCATION FUND   ​
Objective [Heading] Investment objective
Objective, Primary [Text Block]
Total return greater than that of its benchmark, the GMO Global Asset Allocation Index, an internally maintained index computed by GMO consisting of 65% MSCI ACWI and 35% Bloomberg U.S. Aggregate Index.
GMO Emerging Markets Fund | GMO Emerging Markets Fund  
Prospectus [Line Items]  
Risk/Return [Heading] ​  GMO EMERGING MARKETS FUND   ​
Objective [Heading] Investment objective
Objective, Primary [Text Block]
Total return.
GMO Emerging Markets ex-China Fund | GMO Emerging Markets ex-China Fund  
Prospectus [Line Items]  
Risk/Return [Heading] ​  GMO EMERGING MARKETS EX-CHINA FUND   ​
Objective [Heading] Investment objective
Objective, Primary [Text Block]
Total return.
GMO Global Developed Equity Allocation Fund | GMO Global Developed Equity Allocation Fund  
Prospectus [Line Items]  
Risk/Return [Heading] ​  GMO GLOBAL DEVELOPED EQUITY ALLOCATION FUND   ​
Objective [Heading] Investment objective
Objective, Primary [Text Block]
Total return greater than that of its benchmark, the MSCI World Index.
GMO Global Equity Allocation Fund | GMO Global Equity Allocation Fund  
Prospectus [Line Items]  
Risk/Return [Heading] ​  GMO GLOBAL EQUITY ALLOCATION FUND   ​
Objective [Heading] Investment objective
Objective, Primary [Text Block]
Total return greater than that of its benchmark, the MSCI ACWI.
GMO International Developed Equity Allocation Fund | GMO International Developed Equity Allocation Fund  
Prospectus [Line Items]  
Risk/Return [Heading] ​  GMO INTERNATIONAL DEVELOPED EQUITY ALLOCATION FUND   ​
Objective [Heading] Investment objective
Objective, Primary [Text Block]
Total return greater than that of its benchmark, the MSCI World ex USA Index.
GMO International Equity Allocation Fund | GMO International Equity Allocation Fund  
Prospectus [Line Items]  
Risk/Return [Heading] ​  GMO INTERNATIONAL EQUITY ALLOCATION FUND   ​
Objective [Heading] Investment objective
Objective, Primary [Text Block]
Total return greater than that of its benchmark, the MSCI ACWI ex USA.
GMO International Equity Fund | GMO International Equity Fund  
Prospectus [Line Items]  
Risk/Return [Heading] ​  GMO INTERNATIONAL EQUITY FUND   ​
Objective [Heading] Investment objective
Objective, Primary [Text Block]
High total return.
GMO Quality Fund | GMO Quality Fund  
Prospectus [Line Items]  
Risk/Return [Heading] ​  GMO QUALITY FUND   ​
Objective [Heading] Investment objective
Objective, Primary [Text Block]
Total return.
GMO U.S. Equity Fund | GMO U.S. Equity Fund  
Prospectus [Line Items]  
Risk/Return [Heading] ​  GMO U.S. EQUITY FUND   ​
Objective [Heading] Investment objective
Objective, Primary [Text Block]
High total return.
GMO U.S. Small Cap Value Fund | GMO U.S. Small Cap Value Fund  
Prospectus [Line Items]  
Risk/Return [Heading] ​  GMO U.S. SMALL CAP VALUE FUND   ​
Objective [Heading] Investment objective
Objective, Primary [Text Block]
Total return.
GMO Emerging Country Debt Fund | GMO Emerging Country Debt Fund  
Prospectus [Line Items]  
Risk/Return [Heading] ​  GMO EMERGING COUNTRY DEBT FUND   ​
Objective [Heading] Investment objective
Objective, Primary [Text Block]
Total return in excess of that of its benchmark, the J.P. Morgan EMBI Global Diversified.
GMO High Yield Fund | GMO High Yield Fund  
Prospectus [Line Items]  
Risk/Return [Heading] ​  GMO HIGH YIELD FUND   ​
Objective [Heading] Investment objective
Objective, Primary [Text Block]
Total return in excess of that of its benchmark, the Markit iBoxx USD Liquid High Yield Index.
GMO Multi-Asset Credit Fund | GMO Multi-Asset Credit Fund  
Prospectus [Line Items]  
Risk/Return [Heading] ​  GMO MULTI-ASSET CREDIT FUND   ​
Objective [Heading] Investment objective
Objective, Primary [Text Block]
Total return and capital preservation.
GMO Opportunistic Income Fund | GMO Opportunistic Income Fund  
Prospectus [Line Items]  
Risk/Return [Heading] ​  GMO OPPORTUNISTIC INCOME FUND   ​
Objective [Heading] Investment objective
Objective, Primary [Text Block]
Capital appreciation and current income.
GMO Alternative Allocation Fund | GMO Alternative Allocation Fund  
Prospectus [Line Items]  
Risk/Return [Heading] ​  GMO ALTERNATIVE ALLOCATION FUND   ​
Objective [Heading] Investment objective
Objective, Primary [Text Block]
Positive total return.
GMO U.S. Treasury Fund | GMO U.S. Treasury Fund  
Prospectus [Line Items]  
Risk/Return [Heading] ​  GMO U.S. TREASURY FUND   ​
Objective [Heading] Investment objective
Objective, Primary [Text Block]
Liquidity and safety of principal
Objective, Secondary [Text Block] with current income as a secondary objective.