v3.26.1
JPMorgan Government Bond Fund Expense Example - R2 R3 R4 R6 Shares [Member] - JPMorgan Government Bond Fund
Feb. 28, 2026
USD ($)
Class R2  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year $ 107
Expense Example, with Redemption, 3 Years 364
Expense Example, with Redemption, 5 Years 641
Expense Example, with Redemption, 10 Years 1,431
Class R3  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 82
Expense Example, with Redemption, 3 Years 277
Expense Example, with Redemption, 5 Years 489
Expense Example, with Redemption, 10 Years 1,099
Class R4  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 56
Expense Example, with Redemption, 3 Years 200
Expense Example, with Redemption, 5 Years 357
Expense Example, with Redemption, 10 Years 812
Class R6  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 31
Expense Example, with Redemption, 3 Years 118
Expense Example, with Redemption, 5 Years 214
Expense Example, with Redemption, 10 Years $ 495