Brighthouse Franklin Low Duration Total Return Portfolio Average Annual Total Returns |
12 Months Ended | 60 Months Ended | 120 Months Ended |
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2025 |
Dec. 31, 2025 |
|
| Bloomberg U.S. Aggregate Bond Index (reflects no deduction for mutual fund fees or expenses)[Member] | |||
| Prospectus [Line Items] | |||
| Average Annual Return, Percent | 7.30% | (0.36%) | 2.01% |
| Bloomberg U.S. Government/Credit 1-3 Year Bond Index (reflects no deduction for mutual fund fees or expenses)[Member] | |||
| Prospectus [Line Items] | |||
| Average Annual Return, Percent | 5.35% | 1.97% | 2.09% |
| Class A | |||
| Prospectus [Line Items] | |||
| Average Annual Return, Percent | 5.51% | 2.39% | 2.48% |
| Class B | |||
| Prospectus [Line Items] | |||
| Average Annual Return, Percent | 5.25% | 2.14% | 2.23% |