v3.26.3
JPMorgan Small Cap Blend Fund Expense Example - R2 R3 R4 R5 Shares [Member] - JPMorgan Small Cap Blend Fund
Jun. 30, 2026
USD ($)
Class R2  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year $ 152
Expense Example, with Redemption, 3 Years 475
Expense Example, with Redemption, 5 Years 822
Expense Example, with Redemption, 10 Years 1,800
Class R3  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 126
Expense Example, with Redemption, 3 Years 398
Expense Example, with Redemption, 5 Years 690
Expense Example, with Redemption, 10 Years 1,521
Class R4  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 101
Expense Example, with Redemption, 3 Years 320
Expense Example, with Redemption, 5 Years 556
Expense Example, with Redemption, 10 Years 1,234
Class R5  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 86
Expense Example, with Redemption, 3 Years 272
Expense Example, with Redemption, 5 Years 475
Expense Example, with Redemption, 10 Years $ 1,059