Label	Element	Value
Risk/Return:	rr_RiskReturnAbstract
Prospectus Date	rr_ProspectusDate	Oct. 29, 2012

Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Prospectus Date

rr_ProspectusDate

Oct. 29, 2012

Label	Element	Value
Risk/Return:	rr_RiskReturnAbstract
Risk/Return [Heading]	rr_RiskReturnHeading	BBH Money Market Fund
Objective [Heading]	rr_ObjectiveHeading	INVESTMENT OBJECTIVE
Objective, Primary [Text Block]	rr_ObjectivePrimaryTextBlock	The investment objective of the BBH Money Market Fund (the “Fund”) is to provide investors with as high a level of income as is consistent with the preservation of capital and the maintenance of liquidity.
Expense [Heading]	rr_ExpenseHeading	FEES AND EXPENSES OF THE FUND
Expense Narrative [Text Block]	rr_ExpenseNarrativeTextBlock	The table below describes the fees and expenses that you may pay if you buy and hold the Fund’s Regular Shares and Institutional Shares.
Shareholder Fees Caption [Text]	rr_ShareholderFeesCaption	Shareholder Fees (Fees paid directly from your investment)
Operating Expenses Caption [Text]	rr_OperatingExpensesCaption	Annual Fund Operating Expenses (Expenses that you pay each year as a percentage of the value of your investment)
Expense Example [Heading]	rr_ExpenseExampleHeading	EXAMPLE
Expense Example Narrative [Text Block]	rr_ExpenseExampleNarrativeTextBlock	This example is intended to help you compare the cost of investing in the Fund’s Regular Shares and Institutional Shares to the cost of investing in other mutual funds.
Expense Example by, Year, Caption [Text]	rr_ExpenseExampleByYearCaption	The example assumes that you invest $10,000 in the Fund's Regular Shares and Institutional 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 Regular Shares and Institutional Shares remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be:
Strategy [Heading]	rr_StrategyHeading	PRINCIPAL INVESTMENT STRATEGIES
Strategy Narrative [Text Block]	rr_StrategyNarrativeTextBlock	Under normal circumstances, the Fund invests in high quality, U.S. dollar-denominated short-term money market instruments such as U.S. Government securities and bank obligations of U.S. and non-U.S. banks (i.e. certificates of deposit and fixed time deposits), commercial paper, repurchase agreements, municipal bonds, bonds issued by U.S. corporations and obligations of certain supranational organizations. In pursuing its investment objective and implementing its investment strategies, the Fund will comply with Rule 2a-7 (“Rule 2a-7”) under the Investment Company Act of 1940, as amended (the “1940 Act”). In choosing securities, the Fund’s investment adviser seeks to maximize current income within the limits of the Fund’s credit, maturity and diversification policies. Some of these policies may be stricter than the federal regulations that apply to all money market funds. To preserve the value of investors’ capital, the Fund seeks to maintain a stable $1.00 per share price.
Risk [Heading]	rr_RiskHeading	PRINCIPAL RISKS OF THE FUND
Risk Narrative [Text Block]	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. Although the Fund seeks to preserve the value of your investment at $1.00 per share, it is possible to lose money by investing in the Fund. There can be no assurance that the Fund will achieve its investment objective. Amortized Cost Risk: The Fund’s Board of Trustees (the “Board”) may take certain actions, such as suspending redemptions and liquidating the Fund, if the Board determines that the divergence of the Fund’s amortized cost price per share from its market-based net asset value (“NAV”) per share may result in material dilution or other unfair results to shareholders. Credit Risk: This is the risk that an issuer or obligor will default on interest or principal payments. Foreign Investment Risk: Because the Fund invests in securities issued by non-U.S. banks, the Fund is subject to additional risks on these securities such as 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. Interest Rate Risk: This is the risk associated with the price fluctuation of a security in response to changes in interest rates and the possibility that the Fund’s yield may decline if interest rates decline. Market Risk: This is the risk that the prices of and the income generated by the Fund’s securities may decline due to changing economic, political or market conditions, or due to interest rate fluctuations. Municipal Securities Risk: Political, legislative, and economic events may affect a municipal security’s value, interest payments, repayment of principal and the Fund’s ability to sell it. Failure of a municipal security issuer to comply with applicable tax requirements may make income paid thereon taxable, resulting in a decline in the security’s value. Regulatory Risk: The SEC and other regulators may adopt additional money market fund regulations in the future, which may impact the operation and performance of the Fund. Repurchase Agreement Risk: This is the risk that the other party to a repurchase agreement will default on its obligation under the agreement. Selection Risk: This is the risk that the securities selected by the investment adviser will underperform the markets, the relevant indices or the securities selected by other funds with similar investment objectives and investment strategies. Shareholder Concentration Risk: This is the risk that asset allocation decisions, particularly large redemptions, made by investment advisers whose discretionary clients make up a large percentage of the Fund’s shareholders may adversely impact remaining Fund shareholders. Investments in the Fund are neither insured nor guaranteed by the U.S. Government. Shares of the Fund are not deposits or obligations of, or guaranteed by, Brown Brothers Harriman & Co. (“BBH&Co.”) or any other bank, and the shares are neither insured nor guaranteed by the Federal Deposit Insurance Corporation (“FDIC”), the Federal Reserve Board or any other federal, state or other governmental agency.
Risk Money Market Fund [Text]	rr_RiskMoneyMarketFund	Although the Fund seeks to preserve the value of your investment at $1.00 per share, it is possible to lose money by investing in the Fund. There can be no assurance that the Fund will achieve its investment objective.
Risk Not Insured Depository Institution [Text]	rr_RiskNotInsuredDepositoryInstitution	Investments in the Fund are neither insured nor guaranteed by the U.S. Government. Shares of the Fund are not deposits or obligations of, or guaranteed by, Brown Brothers Harriman & Co. ("BBH&Co.") or any other bank, and the shares are neither insured nor guaranteed by the Federal Deposit Insurance Corporation ("FDIC"), the Federal Reserve Board or any other federal, state or other governmental agency.
Bar Chart and Performance Table [Heading]	rr_BarChartAndPerformanceTableHeading	FUND PERFORMANCE
Performance Narrative [Text Block]	rr_PerformanceNarrativeTextBlock	The Fund is a successor to a mutual fund of the same name (the “Predecessor Fund”), which was a series of a Massachusetts business trust of the same name. Performance provided reflects the performance of the Predecessor Fund for periods prior to its reorganization into the Fund, as of the close of business on June 12, 2007. Prior to the reorganization, the Fund achieved its investment objective by investing all of its assets in the BBH U.S. Money Market Portfolio. Accordingly, the performance and financial information provided in this Prospectus for the periods prior to June 12, 2007, is historical information of the Predecessor Fund. 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 Regular Shares from year to year. The table shows the average annual returns of the Fund’s Regular Shares and Institutional Shares for the periods indicated. For current yield information, please call 1-800-625-5759 toll free, or contact your account representative. When you consider this information, please remember that the Fund’s performance in past years is not necessarily an indication of how the Fund will perform in the future.
Performance Information Illustrates Variability of Returns [Text]	rr_PerformanceInformationIllustratesVariabilityOfReturns	The following bar chart and table give an indication of the risks involved with an investment in the Fund.
Performance Availability Phone [Text]	rr_PerformanceAvailabilityPhone	1-800-625-5759
Performance Availability Website Address [Text]	rr_PerformanceAvailabilityWebSiteAddress	www.bbhfunds.com
Performance Past Does Not Indicate Future [Text]	rr_PerformancePastDoesNotIndicateFuture	When you consider this information, please remember that the Fund's performance in past years is not necessarily an indication of how the Fund will perform in the future.
Bar Chart [Heading]	rr_BarChartHeading	Total Return for Regular Shares (% Per Calendar Year)
Bar Chart Closing [Text Block]	rr_BarChartClosingTextBlock	Highest Performing Quarter: 1.24% June 30, 2007 Lowest Performing Quarter: 0.00% December 31, 2011 As of September 30, 2012, the Fund’s Regular Shares and Institutional Shares had calendar year-to-date returns of 0.01% and 0.01%, respectively.
Year to Date Return, Label	rr_YearToDateReturnLabel	As of September 30, 2012, the Fund's Regular Shares and Institutional Shares had calendar year-to-date returns of 0.01% and 0.01%, respectively.
Bar Chart, Year to Date Return, Date	rr_BarChartYearToDateReturnDate	Sep. 30, 2012
Bar Chart, Year to Date Return	rr_BarChartYearToDateReturn	0.01%
Highest Quarterly Return, Label	rr_HighestQuarterlyReturnLabel	Highest Performing Quarter:
Highest Quarterly Return, Date	rr_BarChartHighestQuarterlyReturnDate	Jun. 30, 2007
Highest Quarterly Return	rr_BarChartHighestQuarterlyReturn	1.24%
Lowest Quarterly Return, Label	rr_LowestQuarterlyReturnLabel	Lowest Performing Quarter
Lowest Quarterly Return, Date	rr_BarChartLowestQuarterlyReturnDate	Dec. 31, 2011
Lowest Quarterly Return	rr_BarChartLowestQuarterlyReturn	0.00%
Performance Table Heading	rr_PerformanceTableHeading	Average Annual Total Returns (Through December 31, 2011)
Regular Shares
Risk/Return:	rr_RiskReturnAbstract
Maximum Sales Charge (Load) Imposed on Purchases	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum Deferred Sales Charge (Load)	rr_MaximumDeferredSalesChargeOverOfferingPrice	none
Maximum Sales Charge (Load) Imposed on Reinvested Dividends	rr_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther	none
Redemption Fee	rr_RedemptionFeeOverRedemption	none
Exchange Fee	rr_ExchangeFeeOverRedemption	none
Management Fees	rr_ManagementFeesOverAssets	0.23%
Distribution (12b-1) Fees	rr_DistributionAndService12b1FeesOverAssets	none
Other Expenses	rr_OtherExpensesOverAssets	0.29%
Total Annual Fund Operating Expenses	rr_ExpensesOverAssets	0.52%
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	53
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	167
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	291
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	652
Annual Return 2002	rr_AnnualReturn2002	1.37%
Annual Return 2003	rr_AnnualReturn2003	0.72%
Annual Return 2004	rr_AnnualReturn2004	0.90%
Annual Return 2005	rr_AnnualReturn2005	2.76%
Annual Return 2006	rr_AnnualReturn2006	4.61%
Annual Return 2007	rr_AnnualReturn2007	4.87%
Annual Return 2008	rr_AnnualReturn2008	2.24%
Annual Return 2009	rr_AnnualReturn2009	0.25%
Annual Return 2010	rr_AnnualReturn2010	0.01%
Annual Return 2011	rr_AnnualReturn2011	0.01%
1 Year	rr_AverageAnnualReturnYear01	0.01%
5 Years	rr_AverageAnnualReturnYear05	1.46%
10 Years	rr_AverageAnnualReturnYear10	1.76%
Institutional Shares
Risk/Return:	rr_RiskReturnAbstract
Maximum Sales Charge (Load) Imposed on Purchases	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum Deferred Sales Charge (Load)	rr_MaximumDeferredSalesChargeOverOfferingPrice	none
Maximum Sales Charge (Load) Imposed on Reinvested Dividends	rr_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther	none
Redemption Fee	rr_RedemptionFeeOverRedemption	none
Exchange Fee	rr_ExchangeFeeOverRedemption	none
Management Fees	rr_ManagementFeesOverAssets	0.23%
Distribution (12b-1) Fees	rr_DistributionAndService12b1FeesOverAssets	none
Other Expenses	rr_OtherExpensesOverAssets	0.04%
Total Annual Fund Operating Expenses	rr_ExpensesOverAssets	0.27%
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	28
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	87
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	152
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	343
1 Year	rr_AverageAnnualReturnYear01	0.01%
Since Inception	rr_AverageAnnualReturnSinceInception	1.57%
Inception Date	rr_AverageAnnualReturnInceptionDate	Jan. 26, 2007

Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

BBH Money Market Fund

Objective [Heading]

rr_ObjectiveHeading

INVESTMENT OBJECTIVE

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

The investment objective of the BBH Money Market Fund (the “Fund”) is to provide investors with as high a level of income as is consistent with the preservation of capital and the maintenance of liquidity.

Expense [Heading]

rr_ExpenseHeading

FEES AND EXPENSES OF THE FUND

Expense Narrative [Text Block]

rr_ExpenseNarrativeTextBlock

The table below describes the fees and expenses that you may pay if you buy and hold the Fund’s Regular Shares and Institutional Shares.

Shareholder Fees Caption [Text]

rr_ShareholderFeesCaption

Shareholder Fees (Fees paid directly from your investment)

Operating Expenses Caption [Text]

rr_OperatingExpensesCaption

Annual Fund Operating Expenses (Expenses that you pay each year as a percentage of the value of your investment)

Expense Example [Heading]

rr_ExpenseExampleHeading

EXAMPLE

Expense Example Narrative [Text Block]

rr_ExpenseExampleNarrativeTextBlock

This example is intended to help you compare the cost of investing in the Fund’s Regular Shares and Institutional Shares to the cost of investing in other mutual funds.

Expense Example by, Year, Caption [Text]

rr_ExpenseExampleByYearCaption

The example assumes that you invest $10,000 in the Fund's Regular Shares and Institutional 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 Regular Shares and Institutional Shares remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Strategy [Heading]

rr_StrategyHeading

PRINCIPAL INVESTMENT STRATEGIES

Strategy Narrative [Text Block]

rr_StrategyNarrativeTextBlock

Under normal circumstances, the Fund invests in high quality, U.S. dollar-denominated short-term money market instruments such as U.S. Government securities and bank obligations of U.S. and non-U.S. banks (i.e. certificates of deposit and fixed time deposits), commercial paper, repurchase agreements, municipal bonds, bonds issued by U.S. corporations and obligations of certain supranational organizations. In pursuing its investment objective and implementing its investment strategies, the Fund will comply with Rule 2a-7 (“Rule 2a-7”) under the Investment Company Act of 1940, as amended (the “1940 Act”).

In choosing securities, the Fund’s investment adviser seeks to maximize current income within the limits of the Fund’s credit, maturity and diversification policies. Some of these policies may be stricter than the federal regulations that apply to all money market funds. To preserve the value of investors’ capital, the Fund seeks to maintain a stable $1.00 per share price.

Risk [Heading]

rr_RiskHeading

PRINCIPAL RISKS OF THE FUND

Risk Narrative [Text Block]

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. Although the Fund seeks to preserve the value of your investment at $1.00 per share, it is possible to lose money by investing in the Fund. There can be no assurance that the Fund will achieve its investment objective.

Amortized Cost Risk:

The Fund’s Board of Trustees (the “Board”) may take certain actions, such as suspending redemptions and liquidating the Fund, if the Board determines that the divergence of the Fund’s amortized cost price per share from its market-based net asset value (“NAV”) per share may result in material dilution or other unfair results to shareholders.

Credit Risk:

This is the risk that an issuer or obligor will default on interest or principal payments.

Foreign Investment Risk:

Because the Fund invests in securities issued by non-U.S. banks, the Fund is subject to additional risks on these securities such as 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.

Interest Rate Risk:

This is the risk associated with the price fluctuation of a security in response to changes in interest rates and the possibility that the Fund’s yield may decline if interest rates decline.

Market Risk:

This is the risk that the prices of and the income generated by the Fund’s securities may decline due to changing economic, political or market conditions, or due to interest rate fluctuations.

Municipal Securities Risk:

Political, legislative, and economic events may affect a municipal security’s value, interest payments, repayment of principal and the Fund’s ability to sell it. Failure of a municipal security issuer to comply with applicable tax requirements may make income paid thereon taxable, resulting in a decline in the security’s value.

Regulatory Risk:

The SEC and other regulators may adopt additional money market fund regulations in the future, which may impact the operation and performance of the Fund.

Repurchase Agreement Risk:

This is the risk that the other party to a repurchase agreement will default on its obligation under the agreement.

Selection Risk:

This is the risk that the securities selected by the investment adviser will underperform the markets, the relevant indices or the securities selected by other funds with similar investment objectives and investment strategies.

Shareholder Concentration Risk:

This is the risk that asset allocation decisions, particularly large redemptions, made by investment advisers whose discretionary clients make up a large percentage of the Fund’s shareholders may adversely impact remaining Fund shareholders.

Investments in the Fund are neither insured nor guaranteed by the U.S. Government. Shares of the Fund are not deposits or obligations of, or guaranteed by, Brown Brothers Harriman & Co. (“BBH&Co.”) or any other bank, and the shares are neither insured nor guaranteed by the Federal Deposit Insurance Corporation (“FDIC”), the Federal Reserve Board or any other federal, state or other governmental agency.

Risk Money Market Fund [Text]

rr_RiskMoneyMarketFund

Although the Fund seeks to preserve the value of your investment at $1.00 per share, it is possible to lose money by investing in the Fund. There can be no assurance that the Fund will achieve its investment objective.

Risk Not Insured Depository Institution [Text]

rr_RiskNotInsuredDepositoryInstitution

Investments in the Fund are neither insured nor guaranteed by the U.S. Government. Shares of the Fund are not deposits or obligations of, or guaranteed by, Brown Brothers Harriman & Co. ("BBH&Co.") or any other bank, and the shares are neither insured nor guaranteed by the Federal Deposit Insurance Corporation ("FDIC"), the Federal Reserve Board or any other federal, state or other governmental agency.

Bar Chart and Performance Table [Heading]

rr_BarChartAndPerformanceTableHeading

FUND PERFORMANCE

Performance Narrative [Text Block]

rr_PerformanceNarrativeTextBlock

The Fund is a successor to a mutual fund of the same name (the “Predecessor Fund”), which was a series of a Massachusetts business trust of the same name. Performance provided reflects the performance of the Predecessor Fund for periods prior to its reorganization into the Fund, as of the close of business on June 12, 2007. Prior to the reorganization, the Fund achieved its investment objective by investing all of its assets in the BBH U.S. Money Market Portfolio. Accordingly, the performance and financial information provided in this Prospectus for the periods prior to June 12, 2007, is historical information of the Predecessor Fund.

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 Regular Shares from year to year. The table shows the average annual returns of the Fund’s Regular Shares and Institutional Shares for the periods indicated.

For current yield information, please call 1-800-625-5759 toll free, or contact your account representative. When you consider this information, please remember that the Fund’s performance in past years is not necessarily an indication of how the Fund will perform in the future.

Performance Information Illustrates Variability of Returns [Text]

rr_PerformanceInformationIllustratesVariabilityOfReturns

The following bar chart and table give an indication of the risks involved with an investment in the Fund.

Performance Availability Phone [Text]

rr_PerformanceAvailabilityPhone

1-800-625-5759

Performance Availability Website Address [Text]

rr_PerformanceAvailabilityWebSiteAddress

www.bbhfunds.com

Performance Past Does Not Indicate Future [Text]

rr_PerformancePastDoesNotIndicateFuture

When you consider this information, please remember that the Fund's performance in past years is not necessarily an indication of how the Fund will perform in the future.

Bar Chart [Heading]

rr_BarChartHeading

Total Return for Regular Shares (% Per Calendar Year)

Bar Chart Closing [Text Block]

rr_BarChartClosingTextBlock

Highest Performing Quarter: 1.24% June 30, 2007
Lowest Performing Quarter: 0.00% December 31, 2011

As of September 30, 2012, the Fund’s Regular Shares and Institutional Shares had calendar year-to-date returns of 0.01% and 0.01%, respectively.

Year to Date Return, Label

rr_YearToDateReturnLabel

As of September 30, 2012, the Fund's Regular Shares and Institutional Shares had calendar year-to-date returns of 0.01% and 0.01%, respectively.

Bar Chart, Year to Date Return, Date

rr_BarChartYearToDateReturnDate

Sep. 30, 2012

Bar Chart, Year to Date Return

rr_BarChartYearToDateReturn

0.01%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Highest Performing Quarter:

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Jun. 30, 2007

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

1.24%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Lowest Performing Quarter

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Dec. 31, 2011

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

0.00%

Performance Table Heading

rr_PerformanceTableHeading

Average Annual Total Returns (Through December 31, 2011)

Regular Shares

Risk/Return:

rr_RiskReturnAbstract

Maximum Sales Charge (Load) Imposed on Purchases

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum Deferred Sales Charge (Load)

rr_MaximumDeferredSalesChargeOverOfferingPrice

none

Maximum Sales Charge (Load) Imposed on Reinvested Dividends

rr_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther

none

Redemption Fee

rr_RedemptionFeeOverRedemption

none

Exchange Fee

rr_ExchangeFeeOverRedemption

none

Management Fees

rr_ManagementFeesOverAssets

0.23%

Distribution (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

0.29%

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

0.52%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

167

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

291

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

652

Annual Return 2002

rr_AnnualReturn2002

1.37%

Annual Return 2003

rr_AnnualReturn2003

0.72%

Annual Return 2004

rr_AnnualReturn2004

0.90%

Annual Return 2005

rr_AnnualReturn2005

2.76%

Annual Return 2006

rr_AnnualReturn2006

4.61%

Annual Return 2007

rr_AnnualReturn2007

4.87%

Annual Return 2008

rr_AnnualReturn2008

2.24%

Annual Return 2009

rr_AnnualReturn2009

0.25%

Annual Return 2010

rr_AnnualReturn2010

0.01%

Annual Return 2011

rr_AnnualReturn2011

0.01%

1 Year

rr_AverageAnnualReturnYear01

0.01%

5 Years

rr_AverageAnnualReturnYear05

1.46%

10 Years

rr_AverageAnnualReturnYear10

1.76%

Institutional Shares

Risk/Return:

rr_RiskReturnAbstract

Maximum Sales Charge (Load) Imposed on Purchases

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum Deferred Sales Charge (Load)

rr_MaximumDeferredSalesChargeOverOfferingPrice

none

Maximum Sales Charge (Load) Imposed on Reinvested Dividends

rr_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther

none

Redemption Fee

rr_RedemptionFeeOverRedemption

none

Exchange Fee

rr_ExchangeFeeOverRedemption

none

Management Fees

rr_ManagementFeesOverAssets

0.23%

Distribution (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

0.04%

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

0.27%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

152

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

343

1 Year

rr_AverageAnnualReturnYear01

0.01%

Since Inception

rr_AverageAnnualReturnSinceInception

1.57%

Inception Date

rr_AverageAnnualReturnInceptionDate

Jan. 26, 2007

Shareholder Fees BBH Money Market Fund

Regular Shares

Institutional Shares

Maximum Sales Charge (Load) Imposed on Purchases

none

Maximum Deferred Sales Charge (Load)

none

Maximum Sales Charge (Load) Imposed on Reinvested Dividends

none

Redemption Fee

none

Exchange Fee

none

Operating Expenses BBH Money Market Fund

Regular Shares

Institutional Shares

Management Fees

0.23%

Distribution (12b-1) Fees

none

Other Expenses

0.29%

0.04%

Total Annual Fund Operating Expenses

0.52%

0.27%

Expense Example BBH Money Market Fund (USD $)

1 Year

3 Years

5 Years

10 Years

Regular Shares

167

291

652

Institutional Shares

152

343

Average Annual Returns BBH Money Market Fund

1 Year

5 Years

10 Years

Since Inception

Inception Date

Regular Shares

0.01%

1.46%

1.76%

Institutional Shares

0.01%

1.57%

Jan. 26, 2007

Document and Entity Information

0 Months Ended

Jun. 30, 2012

Risk/Return:

Document Type

485BPOS

Document Period End Date

Jun. 30, 2012

Registrant Name

BBH Trust

Central Index Key

0001342947

Amendment Flag

false

Document Creation Date

Oct. 29, 2012

Document Effective Date

Nov. 01, 2012

Prospectus Date

Oct. 29, 2012


		THE SECURITIES ACT OF 1933		x
		Pre-Effective Amendment No.		¨
		Post-Effective Amendment No. 26		x

		and/or

		REGISTRATION STATEMENT
		UNDER
		THE INVESTMENT COMPANY ACT OF 1940		x
		Amendment No. 30

Name	Title	Date

/s/ Radford W. Klotz	President (Principal Executive Officer)	November 16, 2012
Radford W. Klotz

	Trustee	November 16, 2012
Susan C. Livingston*

	Trustee	November 16, 2012
Joseph V. Shields, Jr.*

	Trustee	November 16, 2012
David P. Feldman*

	Trustee	November 16, 2012
Arthur D. Miltenberger*

	Trustee	November 16, 2012
H. Whitney Wagner*

	Trustee	November 16, 2012
Andrew S. Frazier*

	Trustee	November 16, 2012
John A. Gehret*

	Trustee	November 16, 2012
Mark M. Collins*

/s/ Charles H. Schreiber	Treasurer (Principal Financial Officer)	November 16, 2012
Charles H. Schreiber

/s/ Suzan M. Barron	Secretary	November 16, 2012
By: Suzan M. Barron, Attorney in Fact

Ex-101.INS	XBRL Instance Document
Ex-101.SCH	XBRL Schema Document
Ex-101.CAL	XBRL Calculation Linkbase
Ex-101.DEF	XBRL Definition Linkbase
Ex-101.LAB	XBRL Labels Linkbase
Ex-101.PRE	XBRL Presentation Linkbase

By:	/s/ Radford W. Klotz
	Radford W. Klotz, President (Principal Executive Officer)