The Fund invests, under normal market conditions, at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities of large capitalization companies with growth characteristics and other instruments, such as derivative instruments with economic characteristics similar to such securities, and investment companies (see below) that seek to track the performance of such securities. This investment policy may be changed by the Fund upon 60 days’ prior written notice to shareholders.

S000048334 [Member] Investment Strategy - Bridge Builder Large Cap Growth Fund	Jun. 30, 2026
Prospectus [Line Items]
Strategy [Heading]	Principal Investment Strategies
Strategy Narrative [Text Block]	The Fund invests, under normal market conditions, at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities of large capitalization companies with growth characteristics and other instruments, such as derivative instruments with economic characteristics similar to such securities, and investment companies (see below) that seek to track the performance of such securities. This investment policy may be changed by the Fund upon 60 days’ prior written notice to shareholders. The Fund defines large capitalization companies as companies whose market capitalizations at the time of purchase are comparable to those of companies included in one or more of the following three indices: (i) the Russell 1000^® Index (as of September 30, 2026, companies with capitalizations greater than $1.76 billion); (ii) the S&P 500^® Index (as of September 30, 2026, companies with capitalizations greater than $5.73 billion); or (iii) the MSCI^® ACWI Large Cap Index (as of September 30, 2026, companies with capitalizations greater than $1.73 billion). The market capitalization of the companies included in these indices will change with market conditions. The Fund defines companies with growth characteristics as companies that (i) are included in the Russell 1000 Growth^® Index, the S&P 500^® Growth Index or the MSCI^® ACWI Large Cap Growth Index (the “Growth Indices”); or (ii) are identified by the Adviser or a sub-adviser of the Fund as having characteristics similar to companies included in the Growth Indices, such as projected (FY1) earnings-per-share growth, trailing twelve-month earnings-per-share growth, price-to-projected (FY1) earnings per share, price-to-trailing twelve-month earnings per share and dividend yield. In addition, consistent with its 80% investment policy, the Fund may invest in securities issued by U.S. and foreign entities, including emerging market securities. The Fund may also invest in American Depositary Receipts (“ADRs”) or Global Depositary Receipts (“GDRs”). While the Fund primarily invests in equity securities of large capitalization companies with growth characteristics, it may also invest up to 20% of its net assets in other large capitalization companies or securities of medium and small capitalization companies. The Fund may also invest in other investment companies, including other open-end or closed-end investment companies and exchange-traded funds (“ETFs”) that have characteristics that are consistent with the Fund’s investment strategies. The Fund may also invest a portion of its assets in securities of real estate investment trusts (“REITs”), which are companies that own and/or manage real estate properties. The Fund may also buy or sell derivatives, principally futures contracts, currency forwards and total return swaps, for cash equitization purposes. The Fund may utilize a completion portfolio, which is a supplemental group of investments used to adjust the Fund’s overall portfolio exposures. The completion portfolio serves as a risk-management tool designed to help keep the Fund within the Adviser’s desired investment ranges and exposure limits relative to its benchmark index by seeking to offset material unintended portfolio exposures. The Fund may, from time to time, invest a significant portion of its total assets in securities of companies in certain sectors. As of September 30, 2026, the Fund had significant exposure to securities of companies in the information technology sector. Any investment companies or derivatives that provide exposure to the investments suggested by the Fund’s name or, with respect to derivatives, to one or more of the market risk factors associated with the investment focus suggested by the Fund’s name, are counted toward compliance with the Fund’s 80% investment policy. The Fund follows an investing style that favors growth investments. The Fund’s portfolio is constructed by combining the investment styles and strategies of multiple sub-advisers that have been or will be retained by the Adviser (each a “Sub-adviser”). Each Sub-adviser may use both its own proprietary and external research and securities selection processes to manage its allocated portion of the Fund’s assets. Portfolio securities may be sold at any time. Sales may occur when a Sub-adviser seeks to take advantage of what a Sub-adviser considers to be a better investment opportunity, when a Sub-adviser believes the portfolio securities no longer represent relatively attractive investment opportunities, or when a Sub-adviser believes it would be appropriate to do so in order to readjust the asset allocation of its portion of the Fund’s investment portfolio. The Fund is a non-diversified fund. A non-diversified fund may invest a greater portion of its assets in a single issuer or small group of issuers than a “diversified” fund. The Adviser is responsible for determining the amount of Fund assets to allocate to each Sub-adviser. The Adviser allocates Fund assets for each investment strategy to the following Sub-advisers: Jennison Associates LLC (“Jennison”), Lazard Asset Management LLC (“Lazard”), Los Angeles Capital Management LLC (“LA Capital”), Russell Investment Management, LLC (“RIM”), T. Rowe Price Associates, Inc. (“T. Rowe Price”) and Wellington Management Company, LLP (“Wellington Management”). The Adviser may adjust allocations to the Sub-advisers at any time or make recommendations to the Board with respect to the hiring, termination, or replacement of a Sub‑adviser. Below is a summary of each Sub-adviser’s principal investment strategies. Jennison’s Principal Investment Strategies Jennison seeks to invest in large capitalization securities whose price will increase over the long term. It invests in equity and equity-related securities of companies that it believes have strong capital appreciation potential. In deciding which equities to buy, Jennison follows a highly disciplined investment selection and management process of identifying companies that show superior absolute and relative earnings growth and also are believed to be attractively valued. Jennison’s confidence in potential issuer earnings is an important part of the selection process. Jennison evaluates a company’s value by examining fundamental metrics such as price to forward earnings, price to book value, price to sales, and enterprise value to earnings before interest, taxes, depreciation, and amortization. Lazard’s Principal Investment Strategies Lazard invests primarily in equity securities, principally common stocks, of U.S. companies that Lazard believes have strong and/or improving financial productivity and are undervalued based on their earnings, cash flow or asset values. Although Lazard generally focuses on large capitalization companies, the market capitalizations of issuers in which Lazard invests may vary with market conditions, and Lazard also may invest in medium capitalization and small capitalization companies. LA Capital’s Principal Investment Strategies In managing its portion of the Fund’s assets, LA Capital uses a proprietary quantitative model that includes fundamental data inputs for a universe of large capitalization equity securities and, through the use of statistical tools, estimates expected returns based on each security’s risk characteristics and the expected return to each characteristic in the current market environment. Security weights are assigned through an integrated optimization process which identifies the portfolio with the highest expected return for an acceptable level of risk. LA Capital also employs monitoring tools and certain additional constraints to ensure compliance with guidelines and Fund regulations. The portfolio is rebalanced periodically using the quantitative model. As economic conditions change and investor risk preferences evolve, LA Capital’s forecasts will change accordingly. LA Capital will ordinarily seek to almost fully invest its segment of the Fund’s portfolio. RIM’s Principal Investment Strategies Cash Equitization: At the direction of the Adviser, RIM will expose all or a portion of the Fund’s cash to the performance of certain markets by purchasing derivatives (also known as “cash equitization”), which includes index futures contracts, currency forwards, and total return swaps. This is intended to cause the Fund to perform as though all or a portion of its cash were actually invested in those markets. Completion Portfolio: At the direction of the Adviser, RIM will employ completion portfolio strategies to seek to achieve the Adviser’s preferred portfolio positioning for the Fund and in doing so may invest in equity securities, ADRs, GDRs, other investment companies, REITs, and derivatives such as futures contracts, currency forwards, and total return swaps. RIM may use quantitative and/or rules-based processes and qualitative analysis to assess Fund characteristics and invest in securities and other instruments that RIM believes will achieve the Adviser’s preferred portfolio positioning for the Fund. At the direction of the Adviser, the strategy may be managed to offset undesired relative over- or under-weights to Fund exposures such as volatility, momentum, value, growth, capitalization size, industry, sector, country, specific securities or other factors to seek to achieve the Adviser’s preferred portfolio positioning for the Fund. RIM may utilize tools such as optimization, which involves the analysis of tradeoffs between various risk and return factors as well as turnover and transaction costs, to implement the Adviser’s preferred portfolio positioning for the Fund. T. Rowe Price’s Principal Investment Strategies T. Rowe Price seeks to provide long-term capital appreciation through investments in common stocks of growth companies. T. Rowe Price generally looks for companies having the following characteristics: above-average rate of earnings and cash flow growth and a lucrative niche in the economy that gives them the ability to sustain earnings momentum even during times of slow economic growth. T. Rowe Price will invest primarily in the securities of large capitalization companies. The portion of the Fund managed by T. Rowe Price may also at times invest significantly in certain sectors, such as the information technology sector. Wellington Management’s Principal Investment Strategies Wellington Management seeks to invest primarily in equity securities of U.S. companies that it believes offer strong forward looking quality and growth characteristics. Wellington Management employs a disciplined, fundamentally driven investment process that emphasizes companies that exhibit high quality free cash flow margins (i.e., cash generated after expenses to support operations and maintain capital assets), capital return (i.e., dividends and share buybacks), and revenue growth higher than a certain minimum threshold. The manager then monitors and ranks securities based on their relative attractiveness across this universe, based on quality, growth, valuation, capital returns, and earnings revisions. Securities considered for purchase are attractive on a majority of the metrics (quality, growth, valuation, capital returns, and earnings revisions).

The Fund defines large capitalization companies as companies whose market capitalizations at the time of purchase are comparable to those of companies included in one or more of the following three indices: (i) the Russell 1000^® Index (as of September 30, 2026, companies with capitalizations greater than $1.76 billion); (ii) the S&P 500^® Index (as of September 30, 2026, companies with capitalizations greater than $5.73 billion); or (iii) the MSCI^® ACWI Large Cap Index (as of September 30, 2026, companies with capitalizations greater than $1.73 billion). The market capitalization of the companies included in these indices will change with market conditions.

The Fund defines companies with growth characteristics as companies that (i) are included in the Russell 1000 Growth^® Index, the S&P 500^® Growth Index or the MSCI^® ACWI Large Cap Growth Index (the “Growth Indices”); or (ii) are identified by the Adviser or a sub-adviser of the Fund as having characteristics similar to companies included in the Growth Indices, such as projected (FY1) earnings-per-share growth, trailing twelve-month earnings-per-share growth, price-to-projected (FY1) earnings per share, price-to-trailing twelve-month earnings per share and dividend yield.

In addition, consistent with its 80% investment policy, the Fund may invest in securities issued by U.S. and foreign entities, including emerging market securities. The Fund may also invest in American Depositary Receipts (“ADRs”) or Global Depositary Receipts (“GDRs”). While the Fund primarily invests in equity securities of large capitalization companies with growth characteristics, it may also invest up to 20% of its net assets in other large capitalization companies or securities of medium and small capitalization companies.

The Fund may also invest in other investment companies, including other open-end or closed-end investment companies and exchange-traded funds (“ETFs”) that have characteristics that are consistent with the Fund’s investment strategies. The Fund may also invest a portion of its assets in securities of real estate investment trusts (“REITs”), which are companies that own and/or manage real estate properties. The Fund may also buy or sell derivatives, principally futures contracts, currency forwards and total return swaps, for cash equitization purposes. The Fund may utilize a completion portfolio, which is a supplemental group of investments used to adjust the Fund’s overall portfolio exposures. The completion portfolio serves as a risk-management tool designed to help keep the Fund within the Adviser’s desired investment ranges and exposure limits relative to its benchmark index by seeking to offset material unintended portfolio exposures. The Fund may, from time to time, invest a significant portion of its total assets in securities of companies in certain sectors. As of September 30, 2026, the Fund had significant exposure to securities of companies in the information technology sector. Any investment companies or derivatives that provide exposure to the investments suggested by the Fund’s name or, with respect to derivatives, to one or more of the market risk factors associated with the investment focus suggested by the Fund’s name, are counted toward compliance with the Fund’s 80% investment policy. The Fund follows an investing style that favors growth investments.

The Fund’s portfolio is constructed by combining the investment styles and strategies of multiple sub-advisers that have been or will be retained by the Adviser (each a “Sub-adviser”). Each Sub-adviser may use both its own proprietary and external research and securities selection processes to manage its allocated portion of the Fund’s assets.

Portfolio securities may be sold at any time. Sales may occur when a Sub-adviser seeks to take advantage of what a Sub-adviser considers to be a better investment opportunity, when a Sub-adviser believes the portfolio securities no longer represent relatively attractive investment opportunities, or when a Sub-adviser believes it would be appropriate to do so in order to readjust the asset allocation of its portion of the Fund’s investment portfolio.

(“Jennison”), Lazard Asset Management LLC (“Lazard”), Los Angeles Capital Management LLC (“LA Capital”), Russell Investment Management, LLC (“RIM”), T. Rowe Price Associates, Inc. (“T. Rowe Price”) and Wellington Management Company, LLP (“Wellington Management”). The Adviser may adjust allocations to the Sub-advisers at any time or make recommendations to the Board with respect to the hiring, termination, or replacement of a Sub‑adviser. Below is a summary of each Sub-adviser’s principal investment strategies.

Jennison seeks to invest in large capitalization securities whose price will increase over the long term. It invests in equity and equity-related securities of companies that it believes have strong capital appreciation potential. In deciding which equities to buy, Jennison follows a highly disciplined investment selection and management process of identifying companies that show superior absolute and relative earnings growth and also are believed to be attractively valued. Jennison’s confidence in potential issuer earnings is an important part of the selection process. Jennison evaluates a company’s value by examining fundamental metrics such as price to forward earnings, price to book value, price to sales, and enterprise value to earnings before interest, taxes, depreciation, and amortization.

Lazard invests primarily in equity securities, principally common stocks, of U.S. companies that Lazard believes have strong and/or improving financial productivity and are undervalued based on their earnings, cash flow or asset values. Although Lazard generally focuses on large capitalization companies, the market capitalizations of issuers in which Lazard invests may vary with market conditions, and Lazard also may invest in medium capitalization and small capitalization companies.

In managing its portion of the Fund’s assets, LA Capital uses a proprietary quantitative model that includes fundamental data inputs for a universe of large capitalization equity securities and, through the use of statistical tools, estimates expected returns based on each security’s risk characteristics and the expected return to each characteristic in the current market environment. Security weights are assigned through an integrated optimization process which identifies the portfolio with the highest expected return for an acceptable level of risk. LA Capital also employs monitoring tools and certain additional constraints to ensure compliance with guidelines and Fund regulations. The portfolio is rebalanced periodically using the quantitative model. As economic conditions change and investor risk preferences evolve, LA Capital’s forecasts will change accordingly. LA Capital will ordinarily seek to almost fully invest its segment of the Fund’s portfolio.

At the direction of the Adviser, RIM will expose all or a portion of the Fund’s cash to the performance of certain markets by purchasing derivatives (also known as “cash equitization”), which includes index futures contracts, currency forwards, and total return swaps. This is intended to cause the Fund to perform as though all or a portion of its cash were actually invested in those markets.

At the direction of the Adviser, RIM will employ completion portfolio strategies to seek to achieve the Adviser’s preferred portfolio positioning for the Fund and in doing so may invest in equity securities, ADRs, GDRs, other investment companies, REITs, and derivatives such as futures contracts, currency forwards, and total return swaps. RIM may use quantitative and/or rules-based processes and qualitative analysis to assess Fund characteristics and invest in securities and other instruments that RIM believes will achieve the Adviser’s preferred portfolio positioning for the Fund. At the direction of the Adviser, the strategy may be managed to offset undesired relative over- or under-weights to Fund exposures such as volatility, momentum, value, growth, capitalization size, industry, sector, country, specific securities or other factors to seek to achieve the Adviser’s preferred portfolio positioning for the Fund. RIM may utilize tools such as optimization, which involves the analysis of tradeoffs between various risk and return factors as well as turnover and transaction costs, to implement the Adviser’s preferred portfolio positioning for the Fund.

T. Rowe Price seeks to provide long-term capital appreciation through investments in common stocks of growth companies. T. Rowe Price generally looks for companies having the following characteristics: above-average rate of earnings and cash flow growth and a lucrative niche in the economy that gives them the ability to sustain earnings momentum even during times of slow economic growth. T. Rowe Price will invest primarily in the securities of large capitalization companies. The portion of the Fund managed by T. Rowe Price may also at times invest significantly in certain sectors, such as the information technology sector.

Wellington Management seeks to invest primarily in equity securities of U.S. companies that it believes offer strong forward looking quality and growth characteristics. Wellington Management employs a disciplined, fundamentally driven investment process that emphasizes companies that exhibit high quality free cash flow margins (i.e., cash generated after expenses to support operations and maintain capital assets), capital return (i.e., dividends and share buybacks), and revenue growth higher than a certain minimum threshold. The manager then monitors and ranks securities based on their relative attractiveness across this universe, based on quality, growth, valuation, capital returns, and earnings revisions. Securities considered for purchase are attractive on a majority of the metrics (quality, growth, valuation, capital returns, and earnings revisions).