v3.26.1
Shareholder Report
 6 Months Ended
Apr. 30, 2026
USD ($)
Holding
Shareholder Report [Line Items]  
Document Type N-CSRS
Amendment Flag false
Registrant Name BBH Trust
Entity Central Index Key 0001342947
Entity Investment Company Type N-1A
Document Period End Date Apr. 30, 2026
C000227563  
Shareholder Report [Line Items]  
Fund Name BBH Select Mid Cap ETF
Trading Symbol BBHM
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about BBH Select Mid Cap ETF for the period of November 1, 2025 to April 30, 2026.
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
Additional Information [Text Block] You can find additional information about BBH Select Mid Cap ETF at http://www.bbhfunds.com. You can also request this information by contacting us at 1-800-625-5759.
Material Fund Change Notice [Text Block] This report describes changes to the Fund that occurred during the reporting period.
Additional Information Phone Number 1-800-625-5759
Additional Information Website http://www.bbhfunds.com
Expenses [Text Block]

What were the Fund's costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Cost of a $10,000 Investment
Cost Paid as a % of a $10,000 InvestmentFootnote Reference*
Fund Level
$41
0.81%
FootnoteDescription
Footnote*
Annualized.
Expenses Paid, Amount $ 41
Expense Ratio, Percent 0.81%
AssetsNet $ 521,415,017
Holdings Count | Holding 27
InvestmentCompanyPortfolioTurnover 8.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

  • Total Net Assets$521,415,017
  • # of Portfolio Holdings27
  • Portfolio Turnover Rate8%
Holdings [Text Block]

Sector Diversification (% of Investments)

Table Summary
Common Stock:
 
 
Communication Services
3.3%
 
Consumer Discretionary
4.4%
 
Consumer Staples
7.8%
 
Financials
10.6%
 
Health Care
4.2%
 
Industrials
36.6%
 
Information Technology
21.4%
 
Materials
7.1%
 
Real Estate
4.6%
Largest Holdings [Text Block]

Top Ten Holdings (% of Total Net Assets)

Table Summary
Watsco, Inc.
5.8%
Entegris, Inc.
5.6%
Arista Networks, Inc.
5.2%
Keysight Technologies, Inc.
4.9%
Darling Ingredients, Inc.
4.7%
GXO Logistics, Inc.
4.6%
CBRE Group, Inc. (Class A)
4.5%
Wyndham Hotels & Resorts, Inc.
4.3%
GFL Environmental, Inc. (Canada)
4.3%
ITT, Inc.
4.2%
Material Fund Change [Text Block]

Material Fund Changes

On November 17, 2025, the Fund was reorganized into an exchange-traded fund, BBH Select Mid Cap ETF (the "Acquiring ETF"), under a Plan of Reorganization previously approved by the Board of Trustees of BBH Trust. The reorganization was structured as a tax-free reorganization under the applicable sections of U.S. Internal Revenue Code. All outstanding shares of the Fund were exchanged for shares of equal value of the Acquiring ETF. The shares of the Acquiring ETF are listed under ticker BBHM. The Acquiring ETF has the same investment adviser, investment objective and principal investment strategies as the Fund. The reorganization did not require shareholder approval.

There were no other material fund changes during the period.

 
C000041206  
Shareholder Report [Line Items]  
Fund Name BBH Partner Fund - International Equity
Class Name Class I
Trading Symbol BBHLX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about BBH Partner Fund - International Equity for the period of November 1, 2025 to April 30, 2026.
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
Additional Information [Text Block] You can find additional information about BBH Partner Fund - International Equity at http://www.bbhfunds.com. You can also request this information by contacting us at 1-800-625-5759.
Additional Information Phone Number 1-800-625-5759
Additional Information Website http://www.bbhfunds.com
Expenses [Text Block]

What were the Fund's costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Cost of a $10,000 Investment
Cost Paid as a % of a $10,000 InvestmentFootnote Reference*
Class I
$32
0.63%
FootnoteDescription
Footnote*
Annualized.
Expenses Paid, Amount $ 32
Expense Ratio, Percent 0.63%
AssetsNet $ 2,536,115,476
Holdings Count | Holding 69
InvestmentCompanyPortfolioTurnover 25.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

  • Total Net Assets$2,536,115,476
  • # of Portfolio Holdings69
  • Portfolio Turnover Rate25%
Holdings [Text Block]

Country Diversification

(% of Investments)

Table Summary
Japan
15.8%
Netherlands
10.9%
France
10.7%
Germany
9.5%
United Kingdom
9.1%
Taiwan
6.4%
Ireland
6.1%
Canada
5.6%
Sweden
4.0%
Denmark
4.0%
Others
17.9%

Sector Diversification

(% of Investments)

Table Summary
Common Stock:
 
 
Communication Services
4.9%
 
Consumer Discretionary
4.4%
 
Energy
1.9%
 
Financials
12.5%
 
Health Care
8.9%
 
Industrials
27.5%
 
Information Technology
31.6%
 
Materials
6.9%
Preferred Stock:
 
 
Consumer Discretionary
1.4%
Warrants:
 
 
Information Technology
0.0%
Largest Holdings [Text Block]

Top Ten Holdings

(% of Total Net Assets)

Table Summary
Taiwan Semiconductor Manufacturing Co., Ltd. ADR
5.7%
Keyence Corp.
4.5%
ASML Holding NV
3.9%
Tokyo Electron, Ltd.
3.8%
STMicroelectronics NV
3.1%
Franco-Nevada Corp.
2.4%
BAE Systems, Plc.
2.2%
Schneider Electric SE
2.1%
Hoya Corp.
2.1%
CRH, Plc.
2.1%
Material Fund Change [Text Block]

Material Fund Changes

There were no material fund changes during the period. 
C000041214  
Shareholder Report [Line Items]  
Fund Name BBH Limited Duration Fund
Class Name Class I
Trading Symbol BBBIX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about BBH Limited Duration Fund for the period of November 1, 2025 to April 30, 2026.
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
Additional Information [Text Block] You can find additional information about BBH Limited Duration Fund at http://www.bbhfunds.com. You can also request this information by contacting us at 1-800-625-5759.
Additional Information Phone Number 1-800-625-5759
Additional Information Website http://www.bbhfunds.com
Expenses [Text Block]

What were the Fund's costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Cost of a $10,000 Investment
Cost Paid as a % of a $10,000 InvestmentFootnote Reference*
Class I
$14
0.28%
FootnoteDescription
Footnote*
Annualized.
Expenses Paid, Amount $ 14
Expense Ratio, Percent 0.28%
AssetsNet $ 10,513,343,152
Holdings Count | Holding 486
InvestmentCompanyPortfolioTurnover 17.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

  • Total Net Assets$10,513,343,152
  • # of Portfolio Holdings486
  • Portfolio Turnover Rate17%
Holdings [Text Block]

Breakdown by Security Type (% of Investments)

Table Summary
Asset Backed Securities
22.4%
Commercial Mortgage Backed Securities
3.7%
Corporate Bonds
55.3%
Loan Participations and Assignments
6.4%
Municipal Bonds
0.3%
Residential Mortgage Backed Securities
0.0%
U.S. Government Agency Obligations
1.5%
U.S. Treasury Bills
10.2%
U.S. Treasury Bonds and Notes
0.2%
Largest Holdings [Text Block]

Top Ten Holdings (% of Total Net Assets)*

Table Summary
Canadian Imperial Bank of Commerce, 5.926%, 10/2/2026
0.8%
Mars, Inc., 4.450%, 3/1/2027
0.8%
Salesforce, Inc., 4.650%, 3/15/2029
0.8%
Ford Motor Credit Co. LLC, 5.125%, 11/5/2026
0.7%
Main Street Capital Corp., 3.000%, 7/14/2026
0.7%
Truist Bank, 4.671%, 5/20/2027
0.7%
Medline Borrower LP, 3.875%, 4/1/2029
0.7%
American Tower Corp., 3.375%, 10/15/2026
0.7%
Honeywell International, Inc. Term A1, 0.045%, 5/7/2027
0.7%
Amazon.com, Inc., 4.000%, 3/13/2029
0.6%

  *      Does not include U.S. Government and Agency Obligations and other short-term instruments. 
Material Fund Change [Text Block]

Material Fund Changes

Effective January 1, 2026, Brown Brothers Harriman Credit Partners, LLC ("BBH Credit Partners"), a subsidiary that is majority owned and controlled by Brown Brothers Harriman & Co. ("BBH&Co."), became the investment adviser of BBH Limited Duration Fund.

There were no other material fund changes during the period. 
C000041213  
Shareholder Report [Line Items]  
Fund Name BBH Limited Duration Fund
Class Name Class N
Trading Symbol BBBMX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about BBH Limited Duration Fund for the period of November 1, 2025 to April 30, 2026.
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
Additional Information [Text Block] You can find additional information about BBH Limited Duration Fund at http://www.bbhfunds.com. You can also request this information by contacting us at 1-800-625-5759.
Additional Information Phone Number 1-800-625-5759
Additional Information Website http://www.bbhfunds.com
Expenses [Text Block]

What were the Fund's costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Cost of a $10,000 Investment
Cost Paid as a % of a $10,000 InvestmentFootnote Reference*
Class N
$18
0.35%
FootnoteDescription
Footnote*
Annualized.
Expenses Paid, Amount $ 18
Expense Ratio, Percent 0.35%
AssetsNet $ 10,513,343,152
Holdings Count | Holding 486
InvestmentCompanyPortfolioTurnover 17.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

  • Total Net Assets$10,513,343,152
  • # of Portfolio Holdings486
  • Portfolio Turnover Rate17%
Holdings [Text Block]

Breakdown by Security Type (% of Investments)

Table Summary
Asset Backed Securities
22.4%
Commercial Mortgage Backed Securities
3.7%
Corporate Bonds
55.3%
Loan Participations and Assignments
6.4%
Municipal Bonds
0.3%
Residential Mortgage Backed Securities
0.0%
U.S. Government Agency Obligations
1.5%
U.S. Treasury Bills
10.2%
U.S. Treasury Bonds and Notes
0.2%
Largest Holdings [Text Block]

Top Ten Holdings (% of Total Net Assets)*

Table Summary
Canadian Imperial Bank of Commerce, 5.926%, 10/2/2026
0.8%
Mars, Inc., 4.450%, 3/1/2027
0.8%
Salesforce, Inc., 4.650%, 3/15/2029
0.8%
Ford Motor Credit Co. LLC, 5.125%, 11/5/2026
0.7%
Main Street Capital Corp., 3.000%, 7/14/2026
0.7%
Truist Bank, 4.671%, 5/20/2027
0.7%
Medline Borrower LP, 3.875%, 4/1/2029
0.7%
American Tower Corp., 3.375%, 10/15/2026
0.7%
Honeywell International, Inc. Term A1, 0.045%, 5/7/2027
0.7%
Amazon.com, Inc., 4.000%, 3/13/2029
0.6%

  *      Does not include U.S. Government and Agency Obligations and other short-term instruments. 
Material Fund Change [Text Block]

Material Fund Changes

Effective January 1, 2026, Brown Brothers Harriman Credit Partners, LLC ("BBH Credit Partners"), a subsidiary that is majority owned and controlled by Brown Brothers Harriman & Co. ("BBH&Co."), became the investment adviser of BBH Limited Duration Fund.

There were no other material fund changes during the period. 
C000201413  
Shareholder Report [Line Items]  
Fund Name BBH Income Fund
Class Name Class I
Trading Symbol BBNIX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about BBH Income Fund for the period of November 1, 2025 to April 30, 2026.
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
Additional Information [Text Block] You can find additional information about BBH Income Fund at http://www.bbhfunds.com. You can also request this information by contacting us at 1-800-625-5759.
Additional Information Phone Number 1-800-625-5759
Additional Information Website http://www.bbhfunds.com
Expenses [Text Block]

What were the Fund's costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Cost of a $10,000 Investment
Cost Paid as a % of a $10,000 InvestmentFootnote Reference*
Class I
$22
0.44%
FootnoteDescription
Footnote*
Annualized.
Expenses Paid, Amount $ 22
Expense Ratio, Percent 0.44%
AssetsNet $ 2,332,313,421
Holdings Count | Holding 381
InvestmentCompanyPortfolioTurnover 16.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

  • Total Net Assets$2,332,313,421
  • # of Portfolio Holdings381
  • Portfolio Turnover Rate16%
Holdings [Text Block]

Breakdown by Security Type (% of Investments)

Table Summary
Asset Backed Securities
15.9%
Commercial Mortgage Backed Securities
7.0%
Corporate Bonds
38.0%
Loan Participations and Assignments
11.4%
Municipal Bonds
0.0%
Preferred Securities
1.6%
Residential Mortgage Backed Securities
0.0%
U.S. Government Agency Obligations
0.8%
U.S. Treasury Bills
1.8%
U.S. Treasury Bonds and Notes
23.5%
Largest Holdings [Text Block]

Top Ten Holdings (% of Total Net Assets)*

Table Summary
Oracle Corp., 0.050%, 8/16/2027
0.7%
Lendmark Funding Trust 2026-1A, 4.800%, 11/20/2035
0.7%
Salesforce, Inc., 5.550%, 3/15/2036
0.7%
Palmer Square Loan Funding, Ltd. 2026-1A, 0.000%, 7/15/2034
0.6%
Hologic, Inc. Term A, 0.000%, 4/9/2029
0.5%
HA Sustainable Infrastructure Capital, Inc., 6.375%, 7/1/2034
0.5%
Ares Capital Corp., 2.150%, 7/15/2026
0.5%
OnDeck Asset Securitization IV LLC 2025-2A, 4.840%, 11/17/2032
0.5%
Connect Finco S.a.r.l., 0.082%, 9/27/2029
0.5%
Stack Infrastructure Issuer LLC 2026-1A, 5.000%, 3/27/2056
0.5%

  *      Does not include U.S. Government and Agency Obligations and other short-term instruments. 
Material Fund Change [Text Block]

Material Fund Changes

Effective January 1, 2026, Brown Brothers Harriman Credit Partners, LLC ("BBH Credit Partners"), a subsidiary that is majority owned and controlled by Brown Brothers Harriman & Co. ("BBH&Co."), became the investment adviser of BBH Income Fund. 

There were no other material fund changes during the period.
C000214426  
Shareholder Report [Line Items]  
Fund Name BBH Select Large Cap ETF
Trading Symbol BBHL
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about BBH Select Large Cap ETF for the period of November 1, 2025 to April 30, 2026.
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
Additional Information [Text Block] You can find additional information about BBH Select Large Cap ETF at http://www.bbhfunds.com. You can also request this information by contacting us at 1-800-625-5759.
Material Fund Change Notice [Text Block] This report describes changes to the Fund that occurred during the reporting period.
Additional Information Phone Number 1-800-625-5759
Additional Information Website http://www.bbhfunds.com
Expenses [Text Block]

What were the Fund's costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Cost of a $10,000 Investment
Cost Paid as a % of a $10,000 InvestmentFootnote Reference*
Fund Level
$36
0.71%
FootnoteDescription
Footnote*
Annualized.
Expenses Paid, Amount $ 36
Expense Ratio, Percent 0.71%
AssetsNet $ 513,735,888
Holdings Count | Holding 45
InvestmentCompanyPortfolioTurnover 20.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

  • Total Net Assets$513,735,888
  • # of Portfolio Holdings45
  • Portfolio Turnover Rate20%
Holdings [Text Block]

Sector Diversification (% of Investments)

Table Summary
Common Stock:
 
 
Communication Services
9.3%
 
Consumer Discretionary
9.9%
 
Consumer Staples
7.2%
 
Financials
15.5%
 
Health Care
8.8%
 
Industrials
9.2%
 
Information Technology
35.9%
 
Materials
4.2%
Largest Holdings [Text Block]

Top Ten Holdings (% of Total Net Assets)

Table Summary
Alphabet, Inc. (Class C)
8.4%
Microsoft Corp.
6.4%
KLA Corp.
6.2%
Amazon.com, Inc.
5.8%
Apple, Inc.
5.0%
Waste Management, Inc.
4.0%
Mastercard, Inc. (Class A)
3.8%
Linde, Plc. (Ireland)
3.4%
Applied Materials, Inc.
3.4%
Berkshire Hathaway, Inc. (Class B)
3.3%
Material Fund Change [Text Block]

Material Fund Changes

On November 17, 2025, the Fund was reorganized into an exchange-traded fund, BBH Select Large Cap ETF (the "Acquiring ETF"), under a Plan of Reorganization previously approved by the Board of Trustees of BBH Trust. The reorganization was structured as a tax-free reorganization under the applicable sections of U.S. Internal Revenue Code. All outstanding shares of the Fund were exchanged for shares of equal value of the Acquiring ETF. The shares of the Acquiring ETF are listed under ticker BBHL. The Acquiring ETF has the same investment adviser, investment objective and principal investment strategies as the Fund. The reorganization did not require shareholder approval.

There were no other material fund changes during the period.

C000105435  
Shareholder Report [Line Items]  
Fund Name BBH Intermediate Municipal Bond Fund
Class Name Class I
Trading Symbol BBIIX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about BBH Intermediate Municipal Bond Fund for the period of November 1, 2025 to April 30, 2026.
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
Additional Information [Text Block] You can find additional information about BBH Intermediate Municipal Bond Fund at http://www.bbhfunds.com. You can also request this information by contacting us at 1-800-625-5759.
Additional Information Phone Number 1-800-625-5759
Additional Information Website http://www.bbhfunds.com
Expenses [Text Block]

What were the Fund's costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Cost of a $10,000 Investment
Cost Paid as a % of a $10,000 InvestmentFootnote Reference*
Class I
$22
0.44%
FootnoteDescription
Footnote*
Annualized.
Expenses Paid, Amount $ 22
Expense Ratio, Percent 0.44%
AssetsNet $ 2,388,453,134
Holdings Count | Holding 503
InvestmentCompanyPortfolioTurnover 64.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

  • Total Net Assets$2,388,453,134
  • # of Portfolio Holdings503
  • Portfolio Turnover Rate*64%

  *      8% excluding variable rate demand notes. 
Holdings [Text Block]

Breakdown by Security Type (% of Investments)

Table Summary
Municipal Bonds
100.0%
Largest Holdings [Text Block]

Top Ten Holdings (% of Total Net Assets)

Table Summary
Southeast Energy Authority A Cooperative District, Revenue Bonds, 5.000%, 10/1/2030
2.1%
University of North Carolina at Chapel Hill, Revenue Bonds, 3.495%, 12/1/2041
1.6%
FHLMC Multifamily VRD Certificates, Revenue Bonds, 4.052%, 8/25/2041
1.6%
California Community Choice Financing Authority, Revenue Bonds, 3.540%, 2/1/2052
1.5%
City of South Miami Health Facilities Authority, Inc., Revenue Bonds, 5.000%, 8/15/2042
1.1%
New York City Municipal Water Finance Authority, Revenue Bonds, 3.450%, 5/1/2026
1.1%
Metropolitan Transportation Authority, Revenue Bonds, 4.750%, 11/15/2045
1.0%
Central Plains Energy Project, Revenue Bonds, 5.000%, 5/1/2053
1.0%
Salt Verde Financial Corp., Revenue Bonds, 5.000%, 12/1/2037
1.0%
State of Texas, General Obligation Bonds, 2.800%, 10/1/2041
0.9%
Material Fund Change [Text Block]

Material Fund Changes

There were no material fund changes during the period.

 
C000105434  
Shareholder Report [Line Items]  
Fund Name BBH Intermediate Municipal Bond Fund
Class Name Class N
Trading Symbol BBINX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about BBH Intermediate Municipal Bond Fund for the period of November 1, 2025 to April 30, 2026.
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
Additional Information [Text Block] You can find additional information about BBH Intermediate Municipal Bond Fund at http://www.bbhfunds.com. You can also request this information by contacting us at 1-800-625-5759.
Additional Information Phone Number 1-800-625-5759
Additional Information Website http://www.bbhfunds.com
Expenses [Text Block]

What were the Fund's costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Cost of a $10,000 Investment
Cost Paid as a % of a $10,000 InvestmentFootnote Reference*
Class N
$32
0.65%
FootnoteDescription
Footnote*
Annualized.
Expenses Paid, Amount $ 32
Expense Ratio, Percent 0.65%
AssetsNet $ 2,388,453,134
Holdings Count | Holding 503
InvestmentCompanyPortfolioTurnover 64.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

  • Total Net Assets$2,388,453,134
  • # of Portfolio Holdings503
  • Portfolio Turnover Rate*64%

  *      8% excluding variable rate demand notes. 
Holdings [Text Block]

Breakdown by Security Type (% of Investments)

Table Summary
Municipal Bonds
100.0%
Largest Holdings [Text Block]

Top Ten Holdings (% of Total Net Assets)

Table Summary
Southeast Energy Authority A Cooperative District, Revenue Bonds, 5.000%, 10/1/2030
2.1%
University of North Carolina at Chapel Hill, Revenue Bonds, 3.495%, 12/1/2041
1.6%
FHLMC Multifamily VRD Certificates, Revenue Bonds, 4.052%, 8/25/2041
1.6%
California Community Choice Financing Authority, Revenue Bonds, 3.540%, 2/1/2052
1.5%
City of South Miami Health Facilities Authority, Inc., Revenue Bonds, 5.000%, 8/15/2042
1.1%
New York City Municipal Water Finance Authority, Revenue Bonds, 3.450%, 5/1/2026
1.1%
Metropolitan Transportation Authority, Revenue Bonds, 4.750%, 11/15/2045
1.0%
Central Plains Energy Project, Revenue Bonds, 5.000%, 5/1/2053
1.0%
Salt Verde Financial Corp., Revenue Bonds, 5.000%, 12/1/2037
1.0%
State of Texas, General Obligation Bonds, 2.800%, 10/1/2041
0.9%
Material Fund Change [Text Block]

Material Fund Changes

There were no material fund changes during the period.

 
C000041211  
Shareholder Report [Line Items]  
Fund Name BBH U.S. Government Money Market Fund
Class Name Institutional Shares
Trading Symbol BBSXX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about BBH U.S. Government Money Market Fund for the period of November 1, 2025 to April 30, 2026.
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
Additional Information [Text Block] You can find additional information about BBH U.S. Government Money Market Fund at http://www.bbhfunds.com. You can also request this information by contacting us at 1-800-625-5759.
Additional Information Phone Number 1-800-625-5759
Additional Information Website http://www.bbhfunds.com
Expenses [Text Block]

What were the Fund's costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Cost of a $10,000 Investment
Cost Paid as a % of a $10,000 InvestmentFootnote Reference*
Institutional Shares
$11
0.22%
FootnoteDescription
Footnote*
Annualized.
Expenses Paid, Amount $ 11
Expense Ratio, Percent 0.22%
AssetsNet $ 8,217,475,040
Holdings Count | Holding 27
Additional Fund Statistics [Text Block]

Key Fund Statistics

  • Total Net Assets$8,217,475,040
  • # of Portfolio Holdings27
Holdings [Text Block]

Sector Diversification (% of Investments)

Table Summary
Repurchase Agreements
18.3%
U.S. Treasury Bills
81.7%
Largest Holdings [Text Block]

Top Ten Holdings (% of Total Net Assets)

Table Summary
U.S. Treasury Bill, 3.632%, 6/11/2026
6.1%
U.S. Treasury Bill, 3.619%, 6/4/2026
5.6%
U.S. Treasury Bill, 3.628%, 5/26/2026
5.3%
U.S. Treasury Bill, 3.642%, 5/19/2026
5.1%
U.S. Treasury Bill, 3.626%, 6/9/2026
4.9%
U.S. Treasury Bill, 3.611%, 7/2/2026
4.7%
Royal Bank of Canada, 3.500%, 5/1/2026Footnote Reference*
4.6%
National Australia Bank, Ltd., 3.550%, 5/1/2026Footnote Reference*
4.6%
BNP Paribas, 3.580%, 5/1/2026Footnote Reference*
4.6%
Societe Generale, 3.620%, 5/1/2026Footnote Reference*
4.6%
FootnoteDescription
Footnote*
Repurchase Agreement
Material Fund Change [Text Block]

Material Fund Changes

Effective January 1, 2026, Brown Brothers Harriman Credit Partners, LLC ("BBH Credit Partners"), a subsidiary that is majority owned and controlled by Brown Brothers Harriman & Co. ("BBH&Co."), became the investment adviser of BBH U.S. Government Money Market Fund.

There were no other material fund changes during the period.