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Class K Shares [Member] Investment Objectives and Goals - Class K - BlackRock Advantage CoreAlpha Bond Fund
Dec. 31, 2025
Prospectus [Line Items]  
Risk/Return [Heading] Fund OverviewKey Facts About BlackRock Advantage CoreAlpha Bond Fund
Objective [Heading] Investment Objective
Objective, Primary [Text Block]
BlackRock Advantage CoreAlpha Bond Fund (formerly, BlackRock CoreAlpha Bond Fund) (the Fund), a series of BlackRock Funds VI (the Trust), seeks to provide a combination of income and capital growth.