v3.26.3
JPMorgan Mid Cap Growth Fund Expense Example - R2 R3 R4 R5 R6 Shares [Member] - JPMorgan Mid Cap Growth Fund
Jun. 30, 2026
USD ($)
Class R2  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year $ 137
Expense Example, with Redemption, 3 Years 455
Expense Example, with Redemption, 5 Years 796
Expense Example, with Redemption, 10 Years 1,757
Class R3  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 112
Expense Example, with Redemption, 3 Years 369
Expense Example, with Redemption, 5 Years 646
Expense Example, with Redemption, 10 Years 1,435
Class R4  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 87
Expense Example, with Redemption, 3 Years 291
Expense Example, with Redemption, 5 Years 511
Expense Example, with Redemption, 10 Years 1,146
Class R5  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 72
Expense Example, with Redemption, 3 Years 241
Expense Example, with Redemption, 5 Years 425
Expense Example, with Redemption, 10 Years 959
Class R6  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 61
Expense Example, with Redemption, 3 Years 212
Expense Example, with Redemption, 5 Years 375
Expense Example, with Redemption, 10 Years $ 850