v3.26.1
S000001111 [Member] Average Annual Total Returns
12 Months Ended 60 Months Ended 120 Months Ended
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Money Market Portfolio      
Prospectus [Line Items]      
Average Annual Return, Percent 4.33% 3.27% 2.21%