Shareholder Report, Average Annual Return (Details)

4 Months Ended

11 Months Ended

12 Months Ended

Sep. 30, 2025

Sep. 30, 2025

Sep. 30, 2025

C000254727

Average Annual Return [Line Items]

Line Graph and Table Measure Name

Brown Advisory Flexible Equity ETF

C000259983

Average Annual Return [Line Items]

Line Graph and Table Measure Name

Brown Advisory Sustainable Growth ETF

C000259984

Average Annual Return [Line Items]

Line Graph and Table Measure Name

Brown Advisory Sustainable Value ETF

Without Sales Load [Member] | C000254727

Average Annual Return [Line Items]

Average Annual Return, Percent

8.15%

Without Sales Load [Member] | C000259983

Average Annual Return [Line Items]

Average Annual Return, Percent

5.92%

Without Sales Load [Member] | C000259984

Average Annual Return [Line Items]

Average Annual Return, Percent

7.68%

S&P 500 Index (USD) (NR)

Average Annual Return [Line Items]

Line Graph and Table Measure Name

^[1]

S&P 500 Index (USD) (NR)

Average Annual Return, Percent

14.86%

Russell 1000 Index (USD) (TR)

Average Annual Return [Line Items]

Line Graph and Table Measure Name

^[2]

Russell 1000 Index (USD) (TR)

Average Annual Return, Percent

12.21%

Russell 1000 Index (USD) (TR)

Average Annual Return [Line Items]

Line Graph and Table Measure Name

^[3]

Russell 1000 Index (USD) (TR)

Average Annual Return, Percent

12.21%

Russell 1000 Growth Index (USD) (TR)

Average Annual Return [Line Items]

Line Graph and Table Measure Name

^[2]

Russell 1000 Growth Index (USD) (TR)

Average Annual Return, Percent

15.82%

Russell 1000 Value Index (USD)

Average Annual Return [Line Items]

Line Graph and Table Measure Name

Russell 1000 Value Index (USD)

Average Annual Return, Percent

8.27%

[1]	Net Return (NR) - Reflects no deductions for fees, expenses or taxes (except foreign withholding taxes).
[2]	Total Return (TR) - Reflects no deductions for fees, expenses or taxes.
[3]	Total Return (TR) - Reflects no deductions for fees, expenses or taxes.