INSTITUTIONAL [Member] Investment Objectives and Goals - INSTITUTIONAL - MUNICASH

Oct. 31, 2025

Prospectus [Line Items]

Risk/Return [Heading]

Fund Overview Key Facts About MuniCash

Objective [Heading]

Investment Objective

Objective, Primary [Text Block]

The investment objective of MuniCash (the “Fund”), a series of BlackRock Liquidity Funds (the “Trust”), is to seek as high a level of current income exempt from federal income tax as is consistent with liquidity and stability of principal.