Brighthouse Templeton International Bond Portfolio Average Annual Total Returns |
12 Months Ended | 60 Months Ended | 80 Months Ended | 120 Months Ended |
|---|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2025 |
Dec. 31, 2025 |
Dec. 31, 2025 |
|
| Bloomberg Global Aggregate ex-U.S. (USD Hedged) Index (reflects no deduction for mutual fund fees or expenses)[Member] | ||||
| Prospectus [Line Items] | ||||
| Average Annual Return, Percent | 2.80% | 0.79% | 1.83% | 2.58% |
| FTSE World Government Bond Index ex-U.S. (reflects no deduction for mutual fund fees or expenses)[Member] | ||||
| Prospectus [Line Items] | ||||
| Average Annual Return, Percent | 8.47% | (5.21%) | (0.16%) | |
| Class A | ||||
| Prospectus [Line Items] | ||||
| Average Annual Return, Percent | 16.64% | (0.44%) | (0.39%) | |
| Class B | ||||
| Prospectus [Line Items] | ||||
| Average Annual Return, Percent | 16.35% | (0.69%) | (0.64%) |