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Label Element Value
Risk/Return: rr_RiskReturnAbstract  
Central Index Key dei_EntityCentralIndexKey 0001342947
BBH Global Core Select  
Risk/Return: rr_RiskReturnAbstract  
Risk/Return, Heading rr_RiskReturnHeading BBH GLOBAL CORE SELECT SUMMARY
Investment Objective, Heading rr_ObjectiveHeading INVESTMENT OBJECTIVE
Investment Objective, Primary rr_ObjectivePrimaryTextBlock

The investment objective of BBH Global Core Select (the “Fund”) is to provide investors with long-term growth of capital.
Expense, Heading rr_ExpenseHeading FEES AND EXPENSES OF THE FUND
Expense, Narrative rr_ExpenseNarrativeTextBlock

The table below describes the fees and expenses that you may pay if you buy and hold the Fund’s Class N Shares and Retail Class Shares.
Shareholder Fees, Caption rr_ShareholderFeesCaption Shareholder Fees (Fees paid directly from your investment)
Operating Expenses, Caption rr_OperatingExpensesCaption Annual Fund Operating Expenses (Expenses that you pay each year as a percentage of the value of your investment)
Portfolio Turnover, Heading rr_PortfolioTurnoverHeading Portfolio Turnover
Portfolio Turnover rr_PortfolioTurnoverTextBlock

The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example above, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 24% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 24.00%
Expense Example, Heading rr_ExpenseExampleHeading EXAMPLE
Expense Example, Narrative rr_ExpenseExampleNarrativeTextBlock

This example is intended to help you compare the cost of investing in the Fund’s Class N Shares and Retail Class Shares to the cost of investing in other mutual funds. This example gives effect to the Expense Limitation Agreement for 1 year and the first year of the 3, 5 and 10-year calculations. The example assumes that you invest $10,000 in the Fund’s Class N Shares and Retail Class Shares for the time periods indicated and then redeem all of your shares at the end of those periods. The example also assumes that your investment has a 5% return each year and that the operating expenses of the Fund’s Class N Shares and Retail Class Shares remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be:
Investment Strategy, Heading rr_StrategyHeading PRINCIPAL INVESTMENT STRATEGIES
Investment Strategy, Narrative rr_StrategyNarrativeTextBlock

The Fund will invest primarily in publicly traded equity securities of companies that are located anywhere in the world, including in the United States. The Fund will invest in equities issued by U.S. and non-U.S. firms both directly and in the form of depository receipts representing an interest in these securities. The Fund will invest in companies that are organized, have a majority of their assets, or generate the majority of their operating income in any country, including emerging markets countries, but the Fund intends to invest primarily in the equity securities of companies in countries with developed economies. The Fund’s equity strategy blends aspects of growth and value investing.

The Fund will not be required to allocate its investments among any particular countries or in set percentages. Under normal circumstances, however, the Fund will invest in at least three different countries, and invest at least 40% of its net assets in securities of non-U.S. companies. For these purposes, “non-U.S. companies” are firms that are organized, have a majority of their assets, or generate the majority of their revenues and/or operating income outside the United States. The Fund also seeks to invest in approximately 30-40 different companies that meet its demanding investment criteria. While the Fund may invest in equity securities of companies of any size, the Fund will primarily invest in large and mid-capitalized companies with market capitalizations of $3 billion or greater.

The Fund buys and sells securities denominated in currencies other than the U.S. dollar. Interest, dividends and sale proceeds on such securities are received in currencies other than the U.S. dollar. The Fund may enter into foreign currency exchange transactions from time to time to convert to and from different foreign currencies and to convert foreign currencies to and from the U.S. dollar. The Fund may purchase currency forwards for the purpose of hedging the value of securities purchased or intended to be purchased. However, the Fund will have no obligation to hedge against any risks and there can be no assurance that hedging transactions, if undertaken, will be effective.

The Investment Adviser selects companies based on their long-term investment potential and follows a “buy and own” approach. The Fund does not seek to trade in and out of stocks for small gains. While not a determining factor, the investment adviser may consider tax implications when deciding whether or not to sell a particular investment. As a result of the Investment Adviser’s disciplined investment process, the Fund may, at times, hold large percentages of cash.

The Fund is non-diversified and may invest in a greater percentage of its assets in a particular issuer than would a diversified fund.
Strategy Portfolio Concentration rr_StrategyPortfolioConcentration The Fund will invest primarily in publicly traded equity securities of companies that are located anywhere in the world, including in the United States. The Fund will invest in equities issued by U.S. and non-U.S. firms both directly and in the form of depository receipts representing an interest in these securities. The Fund will invest in companies that are organized, have a majority of their assets, or generate the majority of their operating income in any country, including emerging markets countries, but the Fund intends to invest primarily in the equity securities of companies in countries with developed economies. The Fund’s equity strategy blends aspects of growth and value investing.
Risk, Heading rr_RiskHeading PRINCIPAL RISKS OF THE FUND
Risk, Narrative rr_RiskNarrativeTextBlock

The principal risks of investing in the Fund and the circumstances reasonably likely to adversely affect an investment are listed in alphabetical order and described below. The share price of the Fund changes daily, based on market conditions and other factors. A shareholder may lose money by investing in the Fund. There can be no assurance that the Fund will achieve its investment objective.

Equity Securities Risk:

Equity securities risk is the risk that prices of equity securities rise and fall daily due to factors affecting individual companies, particular industries or the equity market as a whole.

Investment Risk:

Investors in the Fund could lose money, including the possible loss of the entire principal amount of an investment, over short or long periods of time.

Foreign Investment Risk:

Investing in securities of foreign-based companies involves risks not typically associated with investing in securities of companies organized and operated in the United States. These risks include adverse political, social and economic developments abroad, different kinds and levels of market and issuer regulations, and the different characteristics of overseas economies and markets. These factors can make foreign investments more volatile and potentially less liquid than U.S. investments.

Market Risk:

The price of a security may fall due to changing economic, political, regulatory or market conditions, or due to a company’s or issuer’s individual situation.

Currency Exchange Rate Risk:

Because the Fund invests in securities denominated in, or providing exposure to, non-U.S. currencies and the Fund’s net asset value (“NAV”) is determined on the basis of U.S. dollars, the U.S. dollar value of your investment in the Fund may go down if the value of the local currency of the non-U.S. markets in which the Fund invests depreciates against the U.S. dollar. Currency exchange rates can be very volatile and can change quickly and unpredictably.

Medium-Sized Company Risk:

Stocks of medium-sized companies tend to be more volatile and less liquid than stocks of large companies and may trade at prices that reflect incomplete or inaccurate information.

Non-Diversification Risk:

A non-diversified fund may be subject to greater risk than a diversified fund because changes in the financial condition of individual issuers, as well as political, regulatory or economic occurrences affecting such issuers may cause greater fluctuation in the value of a non-diversified fund’s shares. However, the Fund intends to satisfy the asset diversification requirements for qualification as a regulated investment company under Subchapter M of the Internal Revenue Code of 1986, as amended (the “Code”).

Management Risk:

The Fund is actively managed and its success depends upon the investment skills and analytical abilities of the investment adviser to develop and effectively implement strategies that achieve the Fund’s investment objective. Subjective decisions made by the investment adviser may cause the Fund to incur losses or to miss profit opportunities on which it may otherwise have capitalized.

Shareholder Concentration Risk:

Asset allocation decisions, particularly large redemptions, made by an investment adviser whose discretionary clients make up a large percentage of the Fund’s shareholders may adversely impact remaining Fund shareholders.

Emerging Markets Risk:

Emerging markets involve risks greater than those generally associated with investing in more developed foreign markets. These less developed markets can be subject to greater social, economic, regulatory, and political uncertainties and can be extremely volatile.

Capital Controls Risk:

Capital controls imposed by foreign governments in response to economic or political events may impact the ability of the Fund to buy, sell or otherwise transfer securities or currency. This may adversely affect the trading market and price for shares of the Fund, and may cause the Fund to decline in value.
Risk, Lose Money rr_RiskLoseMoney A shareholder may lose money by investing in the Fund.
Risk, Nondiversified Status rr_RiskNondiversifiedStatus Non-Diversification Risk: A non-diversified fund may be subject to greater risk than a diversified fund because changes in the financial condition of individual issuers, as well as political, regulatory or economic occurrences affecting such issuers may cause greater fluctuation in the value of a non-diversified fund’s shares. However, the Fund intends to satisfy the asset diversification requirements for qualification as a regulated investment company under Subchapter M of the Internal Revenue Code of 1986, as amended (the “Code”).
Bar Chart and Performance Table, Heading rr_BarChartAndPerformanceTableHeading FUND PERFORMANCE
Performance, Narrative rr_PerformanceNarrativeTextBlock

The following bar chart and table give an indication of the risks involved with an investment in the Fund. The bar chart shows changes in the performance of the Fund’s Class N Shares from year to year. The table shows how the average annual returns of the Fund’s Class N Shares and Retail Class Shares for the periods indicated compared to a broad-based market index. One cannot invest directly in an index.

When you consider this information, please remember that the Fund’s performance (before and after taxes) in past years is not necessarily an indication of how the Fund will perform in the future. Updated information on the Fund’s performance can be obtained by visiting www.bbhfunds.com or can be obtained by phone at 1-800-575-1265.
Performance, Information Illustrates Variability of Returns rr_PerformanceInformationIllustratesVariabilityOfReturns The following bar chart and table give an indication of the risks involved with an investment in the Fund. The bar chart shows changes in the performance of the Fund’s Class N Shares from year to year. The table shows how the average annual returns of the Fund’s Class N Shares and Retail Class Shares for the periods indicated compared to a broad-based market index.
Performance Availability Phone rr_PerformanceAvailabilityPhone 1-800-575-1265
Performance Availability Website Address rr_PerformanceAvailabilityWebSiteAddress www.bbhfunds.com
Performance Past Does Not Indicate Future rr_PerformancePastDoesNotIndicateFuture When you consider this information, please remember that the Fund’s performance (before and after taxes) in past years is not necessarily an indication of how the Fund will perform in the future.
Bar Chart [Heading] rr_BarChartHeading Total Returns for Class N Shares (% Per Calendar Year) [1]
Bar Chart, Closing rr_BarChartClosingTextBlock
Highest Performing Quarter:       13.51% in 1st quarter of 2019
Lowest Performing Quarter:       (12.52)% in 4th quarter of 2018
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Highest Performing Quarter:
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Mar. 31, 2019
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 13.51%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Lowest Performing Quarter:
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2018
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (12.52%)
Performance Table Heading rr_PerformanceTableHeading Average Annual Total Returns (Through December 31, 2019)
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate The Fund’s performance figures assume that all distributions were reinvested in the Fund. After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. After-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts.
Performance Table One Class of after Tax Shown rr_PerformanceTableOneClassOfAfterTaxShown After-tax returns are shown for only one class and after-tax returns for other classes will vary.
Performance Table Narrative rr_PerformanceTableNarrativeTextBlock

The Fund’s performance figures assume that all distributions were reinvested in the Fund. After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. After-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. After-tax returns are shown for only one class and after-tax returns for other classes will vary.
BBH Global Core Select | MSCI World Index (reflects no deduction of fees, expenses or taxes)  
Risk/Return: rr_RiskReturnAbstract  
Index No Deduction for Fees, Expenses, Taxes rr_IndexNoDeductionForFeesExpensesTaxes (reflects no deduction of fees, expenses or taxes)
1 Year rr_AverageAnnualReturnYear01 27.67%
5 Years rr_AverageAnnualReturnYear05 8.74%
Since Inception rr_AverageAnnualReturnSinceInception 9.75%
Inception Date rr_AverageAnnualReturnInceptionDate Mar. 28, 2013
BBH Global Core Select | MSCI World Index (reflects no deduction of fees, expenses or taxes)  
Risk/Return: rr_RiskReturnAbstract  
Index No Deduction for Fees, Expenses, Taxes rr_IndexNoDeductionForFeesExpensesTaxes (reflects no deduction of fees, expenses or taxes)
1 Year rr_AverageAnnualReturnYear01 27.67%
5 Years rr_AverageAnnualReturnYear05 8.74%
Since Inception rr_AverageAnnualReturnSinceInception 9.84%
Inception Date rr_AverageAnnualReturnInceptionDate Apr. 02, 2013
BBH Global Core Select | Class N Shares  
Risk/Return: rr_RiskReturnAbstract  
Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum Deferred Sales Charge (Load) rr_MaximumDeferredSalesChargeOverOfferingPrice none
Maximum Sales Charge (Load) Imposed on Reinvested Dividends rr_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther none
Redemption Fee on shares held less than 30 days after purchase (as a percentage of amount redeemed, if applicable) rr_RedemptionFeeOverRedemption 2.00%
Exchange Fee rr_ExchangeFeeOverRedemption none
Management Fees rr_ManagementFeesOverAssets 0.95%
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.57%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.52%
Less Fee Waiver/Expense Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.27%) [2]
Total Annual Fund Operating Expenses After Fee Waiver/Expense Reimbursement rr_NetExpensesOverAssets 1.25%
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination March 1, 2021
1 Year rr_ExpenseExampleYear01 $ 127
3 Years rr_ExpenseExampleYear03 453
5 Years rr_ExpenseExampleYear05 803
10 Years rr_ExpenseExampleYear10 $ 1,789
Annual Return 2014 rr_AnnualReturn2014 0.57%
Annual Return 2015 rr_AnnualReturn2015 (2.53%)
Annual Return 2016 rr_AnnualReturn2016 4.82%
Annual Return 2017 rr_AnnualReturn2017 22.51%
Annual Return 2018 rr_AnnualReturn2018 (11.23%)
Annual Return 2019 rr_AnnualReturn2019 26.55%
1 Year rr_AverageAnnualReturnYear01 26.55%
5 Years rr_AverageAnnualReturnYear05 7.05%
Since Inception rr_AverageAnnualReturnSinceInception 7.43%
Inception Date rr_AverageAnnualReturnInceptionDate Mar. 28, 2013
BBH Global Core Select | Class N Shares | After Taxes on Distributions  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 23.57%
5 Years rr_AverageAnnualReturnYear05 5.72%
Since Inception rr_AverageAnnualReturnSinceInception 6.32%
Inception Date rr_AverageAnnualReturnInceptionDate Mar. 28, 2013
BBH Global Core Select | Class N Shares | After Taxes on Distributions and Sale of Fund Shares  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 18.08%
5 Years rr_AverageAnnualReturnYear05 5.47%
Since Inception rr_AverageAnnualReturnSinceInception 5.82%
Inception Date rr_AverageAnnualReturnInceptionDate Mar. 28, 2013
BBH Global Core Select | Retail Class Shares  
Risk/Return: rr_RiskReturnAbstract  
Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum Deferred Sales Charge (Load) rr_MaximumDeferredSalesChargeOverOfferingPrice none
Maximum Sales Charge (Load) Imposed on Reinvested Dividends rr_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther none
Redemption Fee on shares held less than 30 days after purchase (as a percentage of amount redeemed, if applicable) rr_RedemptionFeeOverRedemption 2.00%
Exchange Fee rr_ExchangeFeeOverRedemption none
Management Fees rr_ManagementFeesOverAssets 0.95%
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other Expenses rr_OtherExpensesOverAssets 2.85%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 4.05%
Less Fee Waiver/Expense Reimbursement rr_FeeWaiverOrReimbursementOverAssets (2.55%) [2]
Total Annual Fund Operating Expenses After Fee Waiver/Expense Reimbursement rr_NetExpensesOverAssets 1.50%
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination March 1, 2021
1 Year rr_ExpenseExampleYear01 $ 153
3 Years rr_ExpenseExampleYear03 999
5 Years rr_ExpenseExampleYear05 1,861
10 Years rr_ExpenseExampleYear10 $ 4,090
1 Year rr_AverageAnnualReturnYear01 26.08%
5 Years rr_AverageAnnualReturnYear05 6.77%
Since Inception rr_AverageAnnualReturnSinceInception 7.17%
Inception Date rr_AverageAnnualReturnInceptionDate Apr. 02, 2013
[1] The Fund's Retail Class Shares have a higher overall expense ratio and, as a result, performance would be lower.
[2] Brown Brothers Harriman & Co., through a separately identifiable department (the "Investment Adviser"), has contractually agreed to limit the Total Annual Fund Operating Expenses of the Fund to 1.25% until March 1, 2021 (excluding interest, taxes, brokerage commissions, other expenditures that are capitalized in accordance with generally accepted accounting principles, and other extraordinary expenses not incurred in the ordinary course of the Fund's business and amounts payable pursuant to any plan adopted in accordance with Rule 12b-1, under the Investment Company Act of 1940, (the "1940 Act")) (the "Expense Limitation Agreement"). After exclusions, total operating expenses for Retail Class Shares of the Fund are expected to be 1.50%. The Expense Limitation Agreement may only be terminated during its term with approval of the Fund's Board of Trustees (the "Board").