v3.26.1
S000001275 [Member] Average Annual Total Returns
12 Months Ended 60 Months Ended 120 Months Ended
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
SERVICE SHARES      
Prospectus [Line Items]      
Average Annual Return, Percent 4.20% 3.11% 2.06%