Service and Premier Shares [Member] Average Annual Total Returns |
12 Months Ended | 60 Months Ended | 120 Months Ended |
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2025 |
Dec. 31, 2025 |
|
| Service and Premier Shares [Member] | Service Shares | |||
| Prospectus [Line Items] | |||
| Average Annual Return, Percent | 4.20% | 3.11% | 2.06% |