v3.26.1
S000010795 [Member] Expense Example, No Redemption - S000010795 [Member]
Feb. 28, 2026
USD ($)
C000193108 [Member]  
Prospectus [Line Items]  
Expense Example, No Redemption, 1 Year $ 117
Expense Example, No Redemption, 3 Years 408
Expense Example, No Redemption, 5 Years 720
Expense Example, No Redemption, 10 Years 1,607
C000253706 [Member]  
Prospectus [Line Items]  
Expense Example, No Redemption, 1 Year 66
Expense Example, No Redemption, 3 Years 251
Expense Example, No Redemption, 5 Years 452
Expense Example, No Redemption, 10 Years 1,030
C000029865 [Member]  
Prospectus [Line Items]  
Expense Example, No Redemption, 1 Year 662
Expense Example, No Redemption, 3 Years 886
Expense Example, No Redemption, 5 Years 1,128
Expense Example, No Redemption, 10 Years 1,821
C000029867 [Member]  
Prospectus [Line Items]  
Expense Example, No Redemption, 1 Year 168
Expense Example, No Redemption, 3 Years 562
Expense Example, No Redemption, 5 Years 982
Expense Example, No Redemption, 10 Years 1,956
C000029868 [Member]  
Prospectus [Line Items]  
Expense Example, No Redemption, 1 Year 66
Expense Example, No Redemption, 3 Years 251
Expense Example, No Redemption, 5 Years 452
Expense Example, No Redemption, 10 Years 1,030
C000122583 [Member]  
Prospectus [Line Items]  
Expense Example, No Redemption, 1 Year 59
Expense Example, No Redemption, 3 Years 231
Expense Example, No Redemption, 5 Years 418
Expense Example, No Redemption, 10 Years 958
C000173198 [Member]  
Prospectus [Line Items]  
Expense Example, No Redemption, 1 Year 54
Expense Example, No Redemption, 3 Years 215
Expense Example, No Redemption, 5 Years 391
Expense Example, No Redemption, 10 Years $ 899