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Class K [Member] Annual Total Returns
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Class K | BlackRock Defensive Advantage Emerging Markets Fund | Class K Shares          
Prospectus [Line Items]          
Annual Return [Percent] 14.38% 10.50% 11.98% (11.12%) 4.71%