Annual Total Returns |
12 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
Dec. 31, 2022 |
Dec. 31, 2021 |
Dec. 31, 2020 |
Dec. 31, 2019 |
Dec. 31, 2018 |
Dec. 31, 2017 |
Dec. 31, 2016 |
|
| BLACKROCK ENERGY OPPORTUNITIES FUND | INVESTOR A | ||||||||||
| Prospectus [Line Items] | ||||||||||
| Annual Return [Percent] | 10.53% | 3.79% | 2.60% | 43.06% | 42.93% | (29.65%) | 12.66% | (19.93%) | 2.06% | 26.88% |