v3.25.4
S000001587 [Member] Expense Example - Investment Grade Bond Fund
Oct. 31, 2025
USD ($)
Class Y  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year $ 36
Expense Example, with Redemption, 3 Years 115
Expense Example, with Redemption, 5 Years 201
Expense Example, with Redemption, 10 Years 455
Class C  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 158
Expense Example, with Redemption, 3 Years 492
Expense Example, with Redemption, 5 Years 849
Expense Example, with Redemption, 10 Years 1,856
Class S  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 52
Expense Example, with Redemption, 3 Years 174
Expense Example, with Redemption, 5 Years 308
Expense Example, with Redemption, 10 Years 697
Class A  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 454
Expense Example, with Redemption, 3 Years 623
Expense Example, with Redemption, 5 Years 807
Expense Example, with Redemption, 10 Years 1,338
Class R6  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 39
Expense Example, with Redemption, 3 Years 129
Expense Example, with Redemption, 5 Years 227
Expense Example, with Redemption, 10 Years 515
Class M  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 42
Expense Example, with Redemption, 3 Years 164
Expense Example, with Redemption, 5 Years 298
Expense Example, with Redemption, 10 Years $ 687