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Brighthouse Wellington Large Cap Research Portfolio Average Annual Total Returns
12 Months Ended 60 Months Ended 120 Months Ended
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
S&P 500 Index (reflects no deduction for mutual fund fees or expenses)[Member]      
Prospectus [Line Items]      
Average Annual Return, Percent 17.88% 14.42% 14.82%
Class A      
Prospectus [Line Items]      
Average Annual Return, Percent 15.91% 12.30% 13.62%
Class B      
Prospectus [Line Items]      
Average Annual Return, Percent 15.62% 12.01% 13.33%
Class E      
Prospectus [Line Items]      
Average Annual Return, Percent 15.74% 12.14% 13.45%