Investor A C Institutional and Class R [Member] Annual Total Returns |
12 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
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 |
Dec. 31, 2015 |
|
| Investor A, C, Institutional and Class R | BLACKROCK GLOBAL ALLOCATION FUND, INC. | Investor A | ||||||||||
| Prospectus [Line Items] | ||||||||||
| Annual Return [Percent] | 9.00% | 12.35% | (16.05%) | 6.45% | 20.79% | 17.21% | (7.63%) | 13.32% | 3.75% | (1.05%) |