v3.26.1
JPMorgan High Yield Fund Expense Example - R2 R3 R4 R5 R6 Shares [Member] - JPMorgan High Yield Fund
Feb. 28, 2026
USD ($)
Class R2  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year $ 122
Expense Example, with Redemption, 3 Years 436
Expense Example, with Redemption, 5 Years 773
Expense Example, with Redemption, 10 Years 1,724
Class R3  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 97
Expense Example, with Redemption, 3 Years 337
Expense Example, with Redemption, 5 Years 596
Expense Example, with Redemption, 10 Years 1,337
Class R4  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 72
Expense Example, with Redemption, 3 Years 293
Expense Example, with Redemption, 5 Years 532
Expense Example, with Redemption, 10 Years 1,219
Class R5  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 56
Expense Example, with Redemption, 3 Years 215
Expense Example, with Redemption, 5 Years 388
Expense Example, with Redemption, 10 Years 890
Class R6  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 46
Expense Example, with Redemption, 3 Years 177
Expense Example, with Redemption, 5 Years 320
Expense Example, with Redemption, 10 Years $ 736