v3.26.3
S000010615 [Member] Shareholder Fees - S000010615 [Member]
May 31, 2026
C000029350 [Member]  
Prospectus [Line Items]  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) 3.00%
Maximum Deferred Sales Charge (as a percentage) 0.75% [1]
C000029352 [Member]  
Prospectus [Line Items]  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) 0.00%
Maximum Deferred Sales Charge (as a percentage) 1.00% [2]
C000029353 [Member]  
Prospectus [Line Items]  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) 0.00%
Maximum Deferred Sales Charge (as a percentage) 0.00%
C000122656 [Member]  
Prospectus [Line Items]  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) 0.00%
Maximum Deferred Sales Charge (as a percentage) 0.00%
C000175730 [Member]  
Prospectus [Line Items]  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) 0.00%
Maximum Deferred Sales Charge (as a percentage) 0.00%
C000255598 [Member]  
Prospectus [Line Items]  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) 0.00%
Maximum Deferred Sales Charge (as a percentage) 0.00%
[1] This charge is imposed on certain investments of $500,000 or more redeemed within 12 months after purchase, with certain limited exceptions.
[2] This charge applies to redemptions within 12 months after purchase, with certain limited exceptions.