Shareholder Service Fee BBH Select Large Cap ETF BBH Select Mid Cap ETF BBH Partner Fund - International Equity BBH Limited Duration Fund BBH INCOME FUND BBH Intermediate Municipal Bond Fund BBH U.S. Government Money Market Fund BBH Select Large Cap ETF BBH Select Mid Cap ETF Class I Shares Class N Shares Class I Shares CLASS N SHARES CLASS I SHARES Class N Shares Class I Shares Institutional Shares Stable NAV Risk [Member] Issuer Risk [Member] Credit Risk [Member] Asset-Backed Securities Risk [Member] Asset-Backed Securities (“ABS”) Risk [Member] Loan Risk [Member] Mid Cap Company Risk [Member] Investment Risk [Member] Market Risk [Member] Municipal Issuer Risk [Member] Municipal Revenue Sector Risk [Member] Geographic Risk [Member] Taxation Risk [Member] When-Issued and Delayed Delivery Securities Risk [Member] Repurchase Agreement Risk [Member] Sector Risk [Member] Sovereign Debt Risk [Member] Below Investment Grade Securities (Junk Bonds) Risk [Member] Call Risk [Member] Equity Securities Risk [Member] Preferred Securities Risk [Member] Large Cap Company Risk [Member] Limited Portfolio Holdings Risk [Member] Emerging Markets Risk [Member] Capital Controls Risk [Member] Small Cap Company Risk [Member] ETF Risk [Member] Non-Diversification Risk [Member] Non-U.S. Investment Risk [Member] Investment in Other Investment Companies Risk [Member] IPO Risk [Member] Management Risk [Member] U.S. Government Agency Securities Risk [Member] Variable and Floating Rate Instrument Risk [Member] Regulatory Risk [Member] Interest Rate Risk [Member] Maturity Risk [Member] Prepayment Risk [Member] Mortgage-Backed Securities Risk [Member] Illiquid Investment Risk [Member] Private Placement Risk [Member] Investment Company Risk [Member] Business Development Company Risk [Member] Convertible Securities Risk [Member] Currency Exchange Rate Risk [Member] Large Shareholder Risk [Member] Derivatives Risk [Member] S&P 500 Index (reflects no deduction of fees, expenses or taxes) S&P 500 Index (reflects no deduction for fees, expenses or taxes) Russell Mid Cap Total Return Index (reflects no deduction for fees, expenses or taxes) MSCI-EAFE Index (reflects no deduction for fees, expenses or taxes) Bloomberg US Aggregate Index (reflects no deduction for fees, expenses or taxes) Bloomberg U.S. 1-3 Year Treasury Bond Index (reflects no deduction for fees, expenses or taxes) Reference Benchmark (an unmanaged weighted index comprised as follows: 40% Bloomberg Short-Term Corporate Index; 40% Bloomberg US Aggregate ABS Index; and 20% Bloomberg US Treasury Bills Index) Bloomberg Municipal Bond 1-15 Year Blend Index (reflects no deduction of fees, expenses or taxes) Geographic Risk Member Non Diversification Risk Member Credit Risks Member C000041213 Member Asset Backed Securities Risk Member Management Risk Member index_ Bloomberg_ US_ Aggregate_ Index_reflects_no_deduction_for_fees_expenses_or_taxes Member Currency Exchange Rate Risk Member Investment Risk Member Small Cap Company Risk Member Illiquid Investment Risk Member S000015105 Member C000201413 Member Sovereign Debt Risk Member C000105434 Member Prepayment Risks Member Large Shareholder Risk Member Taxation Risk Member Non USInvestment Risk Member Call Risk Member Emerging Markets Risk Member ETFRisk Member USGovernment Agency Securities Risk Member C000041214 Member Below Investment Grade Securities Junk Bonds Risk Member Asset Backed Securities ABSRisk Member C000041206 Member Large Cap Company Risk Member S000034202 Member Derivatives Risk Member C000041211 Member Equity Securities Risk Member Investment In Other Investment Companies Risk Member Mortgage Backed Securities Risk Member Municipal Issuer Risk Member C000264398 Member IPORisk Member When Issued And Delayed Delivery Securities Risk Member Maturity Risk Member index_ Reference_ Benchmark_an_unmanaged_weighted_index_comprised_as_follows_40_ Bloomberg_ Short Term_ Corporate_ Index_40_ Bloomberg_ US_ Aggregate_ ABS_ Index_and_20_ Bloomberg_ US_ Treasury_ Bills_ Index Member C000105435 Member C000201414 Member C000264397 Member Variable And Floating Rate Instrument Risk Member Sector Risk Member S000062218 Member S000015110 Member Capital Controls Risk Member Investment Company Risk Member Business Development Company Risk Member Preferred Securities Risk Member S000095660 Member Market Risk Member Mid Cap Company Risk Member Convertible Securities Risk Member Loan Risk Member Regulatory Risk Member S000015108 Member Private Placement Risk Member index_ MSCIEAFE_ Index_reflects_no_deduction_for_fees_expenses_or_taxes Member index_ SP_500_ Index_reflects_no_deduction_of_fees_expenses_or_taxes Member Municipal Revenue Sector Risk Member S000095661 Member Stable NAVRisk Member Limited Portfolio Holdings Risk Member index_ Bloomberg_ US_13_ Year_ Treasury_ Bond_ Index_reflects_no_deduction_for_fees_expenses_or_taxes Member index_ Bloomberg_ Municipal_ Bond_115_ Year_ Blend_ Index_reflects_no_deduction_of_fees_expenses_or_taxes Member index_ SP_500_ Index_reflects_no_deduction_for_fees_expenses_or_taxes Member Issuer Risk Member Repurchase Agreement Risk Member Interest Rate Risks Member index_ Russell_ Mid_ Cap_ Total_ Return_ Index_reflects_no_deduction_for_fees_expenses_or_taxes Member