JPMorgan Equity Index Fund Average Annual Total Returns - A C I 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 A | |||
| Prospectus [Line Items] | |||
| Average Annual Return, Percent | 11.20% | 12.69% | 13.69% |
| Class C | |||
| Prospectus [Line Items] | |||
| Average Annual Return, Percent | 15.65% | 13.23% | 13.74% |
| Class I | |||
| Prospectus [Line Items] | |||
| Average Annual Return, Percent | 17.65% | 14.19% | 14.59% |
| Class I | After Taxes on Distributions | |||
| Prospectus [Line Items] | |||
| Average Annual Return, Percent | 17.30% | 13.74% | 13.83% |
| Class I | After Taxes on Distributions and Sales | |||
| Prospectus [Line Items] | |||
| Average Annual Return, Percent | 10.65% | 11.27% | 11.97% |