JPMorgan Equity Index Fund Average Annual Total Returns - R6 Shares [Member] |
12 Months Ended | 60 Months Ended | 120 Months Ended |
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2025 |
Dec. 31, 2025 |
|
| S&P 500 INDEX(Reflects No Deduction for Fees, Expenses, or Taxes)[Member] | |||
| Prospectus [Line Items] | |||
| Average Annual Return, Percent | 17.88% | 14.42% | 14.82% |
| Class R6 | |||
| Prospectus [Line Items] | |||
| Average Annual Return, Percent | 17.82% | 14.37% | 14.76% |
| Class R6 | After Taxes on Distributions | |||
| Prospectus [Line Items] | |||
| Average Annual Return, Percent | 17.43% | 13.87% | 13.95% |
| Class R6 | After Taxes on Distributions and Sales | |||
| Prospectus [Line Items] | |||
| Average Annual Return, Percent | 10.78% | 11.41% | 12.10% |