GMO Alternative Allocation Fund Annual Fund Operating Expenses - GMO Alternative Allocation Fund |
Feb. 28, 2026 |
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| Prospectus [Line Items] | ||||||||
| Fee Waiver or Reimbursement over Assets, Date of Termination | <span style="color:#000000;font-family:Times New Roman;font-size:8pt;font-style:italic;">June 30, 2027</span><span style="color:#000000;font-family:Times New Roman;font-size:8pt;font-style:italic;">June 30, 2027</span> | |||||||
| Class II | ||||||||
| Prospectus [Line Items] | ||||||||
| Management Fees (as a percentage of Assets) | 0.95% | [1] | ||||||
| Component1 Other Expenses | 1.91% | [2] | ||||||
| Component3 Other Expenses | 0.15% | |||||||
| Other Expenses (as a percentage of Assets): | 2.06% | |||||||
| Expenses (as a percentage of Assets) | 3.01% | |||||||
| Fee Waiver or Reimbursement | (0.11%) | [1] | ||||||
| Net Expenses (as a percentage of Assets) | 2.90% | |||||||
| Class III | ||||||||
| Prospectus [Line Items] | ||||||||
| Management Fees (as a percentage of Assets) | 0.88% | [1] | ||||||
| Component1 Other Expenses | 1.91% | [2] | ||||||
| Component3 Other Expenses | 0.15% | |||||||
| Other Expenses (as a percentage of Assets): | 2.06% | |||||||
| Expenses (as a percentage of Assets) | 2.94% | |||||||
| Fee Waiver or Reimbursement | (0.11%) | [1] | ||||||
| Net Expenses (as a percentage of Assets) | 2.83% | |||||||
| Class IV | ||||||||
| Prospectus [Line Items] | ||||||||
| Management Fees (as a percentage of Assets) | 0.835% | [1] | ||||||
| Component1 Other Expenses | 1.91% | [2] | ||||||
| Component3 Other Expenses | 0.15% | |||||||
| Other Expenses (as a percentage of Assets): | 2.06% | |||||||
| Expenses (as a percentage of Assets) | 2.90% | |||||||
| Fee Waiver or Reimbursement | (0.11%) | [1] | ||||||
| Net Expenses (as a percentage of Assets) | 2.79% | |||||||
| Class V | ||||||||
| Prospectus [Line Items] | ||||||||
| Management Fees (as a percentage of Assets) | 0.815% | [1] | ||||||
| Component1 Other Expenses | 1.91% | [2] | ||||||
| Component3 Other Expenses | 0.15% | |||||||
| Other Expenses (as a percentage of Assets): | 2.06% | |||||||
| Expenses (as a percentage of Assets) | 2.88% | |||||||
| Fee Waiver or Reimbursement | (0.11%) | [1] | ||||||
| Net Expenses (as a percentage of Assets) | 2.77% | |||||||
| Class VI | ||||||||
| Prospectus [Line Items] | ||||||||
| Management Fees (as a percentage of Assets) | 0.785% | [1] | ||||||
| Component1 Other Expenses | 1.91% | [2] | ||||||
| Component3 Other Expenses | 0.15% | |||||||
| Other Expenses (as a percentage of Assets): | 2.06% | |||||||
| Expenses (as a percentage of Assets) | 2.85% | |||||||
| Fee Waiver or Reimbursement | (0.11%) | [1] | ||||||
| Net Expenses (as a percentage of Assets) | 2.74% | |||||||
| Class R6 | ||||||||
| Prospectus [Line Items] | ||||||||
| Management Fees (as a percentage of Assets) | 0.95% | [1] | ||||||
| Component1 Other Expenses | 1.91% | [2] | ||||||
| Component3 Other Expenses | 0.15% | |||||||
| Other Expenses (as a percentage of Assets): | 2.06% | |||||||
| Expenses (as a percentage of Assets) | 3.01% | |||||||
| Fee Waiver or Reimbursement | (0.11%) | [1] | ||||||
| Net Expenses (as a percentage of Assets) | 2.90% | |||||||
| Class I | ||||||||
| Prospectus [Line Items] | ||||||||
| Management Fees (as a percentage of Assets) | 0.95% | [1] | ||||||
| Component1 Other Expenses | 1.91% | [2] | ||||||
| Component3 Other Expenses | 0.29% | [3] | ||||||
| Other Expenses (as a percentage of Assets): | 2.20% | [3] | ||||||
| Expenses (as a percentage of Assets) | 3.15% | |||||||
| Fee Waiver or Reimbursement | (0.13%) | [1],[3] | ||||||
| Net Expenses (as a percentage of Assets) | 3.02% | |||||||
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