v3.26.3
JPMorgan Small Cap Growth Fund Expense Example - R2 R3 R4 R5 R6 Shares [Member] - JPMorgan Small Cap Growth Fund
Jun. 30, 2026
USD ($)
Class R2  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year $ 143
Expense Example, with Redemption, 3 Years 471
Expense Example, with Redemption, 5 Years 822
Expense Example, with Redemption, 10 Years 1,812
Class R3  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 117
Expense Example, with Redemption, 3 Years 395
Expense Example, with Redemption, 5 Years 694
Expense Example, with Redemption, 10 Years 1,544
Class R4  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 92
Expense Example, with Redemption, 3 Years 311
Expense Example, with Redemption, 5 Years 547
Expense Example, with Redemption, 10 Years 1,226
Class R5  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 77
Expense Example, with Redemption, 3 Years 263
Expense Example, with Redemption, 5 Years 466
Expense Example, with Redemption, 10 Years 1,051
Class R6  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 66
Expense Example, with Redemption, 3 Years 230
Expense Example, with Redemption, 5 Years 407
Expense Example, with Redemption, 10 Years $ 921