Shareholder Report, Line Graph (Details) 74200001190_Franklin Natural Resources Fund_Class R6_TSR Annual {Class R6} - USD ($) |
12 Months Ended | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Apr. 30, 2025 |
Apr. 30, 2024 |
Apr. 30, 2023 |
Apr. 30, 2022 |
Apr. 30, 2021 |
Apr. 30, 2020 |
Apr. 30, 2019 |
Apr. 30, 2018 |
Apr. 30, 2017 |
Apr. 30, 2016 |
Apr. 30, 2026 |
|
| Class R6 | |||||||||||
| Account Value [Line Items] | |||||||||||
| Line Graph and Table Measure Name | Class R6 | ||||||||||
| Accumulated Value | $ 13,854 | $ 14,826 | $ 13,132 | $ 12,275 | $ 8,944 | $ 5,906 | $ 10,014 | $ 11,551 | $ 10,189 | $ 10,000 | $ 22,908 |
| Russell 3000 Index [Member] | |||||||||||
| Account Value [Line Items] | |||||||||||
| Line Graph and Table Measure Name | Russell 3000 Index | ||||||||||
| Accumulated Value | 30,227 | 27,133 | 22,186 | 21,857 | 22,560 | 14,948 | 15,106 | 13,406 | 11,858 | 10,000 | $ 39,601 |
| S&P North American Natural Resources Sector Index [Member] | |||||||||||
| Account Value [Line Items] | |||||||||||
| Line Graph and Table Measure Name | S&P North American Natural Resources Sector Index | ||||||||||
| Accumulated Value | 17,404 | 18,055 | 15,613 | 14,748 | 10,399 | 7,397 | 10,301 | 11,334 | 10,259 | 10,000 | $ 26,756 |
| S&P Global Natural Resources Index [Member] | |||||||||||
| Account Value [Line Items] | |||||||||||
| Line Graph and Table Measure Name | S&P Global Natural Resources Index | ||||||||||
| Accumulated Value | $ 18,866 | $ 20,227 | $ 19,099 | $ 19,271 | $ 16,042 | $ 10,454 | $ 13,126 | $ 13,791 | $ 11,147 | $ 10,000 | $ 28,277 |