Loomis Sayles Global Allocation Portfolio Average Annual Total Returns |
12 Months Ended | 60 Months Ended | 120 Months Ended |
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2025 |
Dec. 31, 2025 |
|
| MSCI All Country World Index (reflects no deduction for mutual fund fees or expenses)[Member] | |||
| Prospectus [Line Items] | |||
| Average Annual Return, Percent | 22.34% | 11.19% | 11.72% |
| Bloomberg Global Aggregate Index (reflects no deduction for mutual fund fees or expenses)[Member] | |||
| Prospectus [Line Items] | |||
| Average Annual Return, Percent | 8.17% | (2.15%) | 1.26% |
| FTSE World Government Bond Index (reflects no deduction for mutual fund fees or expenses)[Member] | |||
| Prospectus [Line Items] | |||
| Average Annual Return, Percent | 7.55% | (3.53%) | 0.54% |
| MSCI World Index (reflects no deduction for mutual fund fees or expenses)[Member] | |||
| Prospectus [Line Items] | |||
| Average Annual Return, Percent | 21.09% | 12.15% | 12.17% |
| Class A | |||
| Prospectus [Line Items] | |||
| Average Annual Return, Percent | 12.94% | 6.52% | 9.50% |
| Class B | |||
| Prospectus [Line Items] | |||
| Average Annual Return, Percent | 12.59% | 6.25% | 9.22% |