v3.26.1
S000010818 [Member] Expense Example, No Redemption - S000010818 [Member]
Feb. 28, 2026
USD ($)
C000253708 [Member]  
Prospectus [Line Items]  
Expense Example, No Redemption, 1 Year $ 59
Expense Example, No Redemption, 3 Years 270
Expense Example, No Redemption, 5 Years 498
Expense Example, No Redemption, 10 Years 1,154
C000030031 [Member]  
Prospectus [Line Items]  
Expense Example, No Redemption, 1 Year 85
Expense Example, No Redemption, 3 Years 349
Expense Example, No Redemption, 5 Years 633
Expense Example, No Redemption, 10 Years 1,443
C000030032 [Member]  
Prospectus [Line Items]  
Expense Example, No Redemption, 1 Year 110
Expense Example, No Redemption, 3 Years 427
Expense Example, No Redemption, 5 Years 766
Expense Example, No Redemption, 10 Years 1,724
C000030033 [Member]  
Prospectus [Line Items]  
Expense Example, No Redemption, 1 Year 59
Expense Example, No Redemption, 3 Years 270
Expense Example, No Redemption, 5 Years 498
Expense Example, No Redemption, 10 Years 1,154
C000079027 [Member]  
Prospectus [Line Items]  
Expense Example, No Redemption, 1 Year 42
Expense Example, No Redemption, 3 Years 216
Expense Example, No Redemption, 5 Years 406
Expense Example, No Redemption, 10 Years $ 953