v3.26.1
GMO U.S. Small Cap Value Fund Expense Example - GMO U.S. Small Cap Value Fund
Feb. 28, 2026
USD ($)
Class III  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year $ 60
Expense Example, with Redemption, 3 Years 230
Expense Example, with Redemption, 5 Years 415
Expense Example, with Redemption, 10 Years 948
Class IV  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 55
Expense Example, with Redemption, 3 Years 214
Expense Example, with Redemption, 5 Years 387
Expense Example, with Redemption, 10 Years 889
Class V  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 54
Expense Example, with Redemption, 3 Years 211
Expense Example, with Redemption, 5 Years 382
Expense Example, with Redemption, 10 Years 877
Class VI  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 51
Expense Example, with Redemption, 3 Years 202
Expense Example, with Redemption, 5 Years 365
Expense Example, with Redemption, 10 Years 841
Class R6  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 60
Expense Example, with Redemption, 3 Years 230
Expense Example, with Redemption, 5 Years 415
Expense Example, with Redemption, 10 Years 948
Class I  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 76
Expense Example, with Redemption, 3 Years 277
Expense Example, with Redemption, 5 Years 496
Expense Example, with Redemption, 10 Years $ 1,126