Shareholder Report, Average Annual Return (Details) 74200001190_Franklin Natural Resources Fund_Class R6_TSR Annual {Class R6} |
12 Months Ended | 60 Months Ended | 120 Months Ended |
|---|---|---|---|
Apr. 30, 2026 |
Apr. 30, 2026 |
Apr. 30, 2026 |
|
| Class R6 | |||
| Average Annual Return [Line Items] | |||
| Line Graph and Table Measure Name | Class R6 | ||
| Average Annual Return, Percent | 65.36% | 20.70% | 8.64% |
| Russell 3000 Index [Member] | |||
| Average Annual Return [Line Items] | |||
| Line Graph and Table Measure Name | Russell 3000 Index | ||
| Average Annual Return, Percent | 31.01% | 11.91% | 14.76% |
| S&P North American Natural Resources Sector Index [Member] | |||
| Average Annual Return [Line Items] | |||
| Line Graph and Table Measure Name | S&P North American Natural Resources Sector Index | ||
| Average Annual Return, Percent | 53.73% | 20.81% | 10.34% |
| S&P Global Natural Resources Index [Member] | |||
| Average Annual Return [Line Items] | |||
| Line Graph and Table Measure Name | S&P Global Natural Resources Index | ||
| Average Annual Return, Percent | 49.88% | 12.01% | 10.96% |