S000061847 [Member] Investment Risks - Baron Health Care Fund	Dec. 31, 2025
Concentration [Member]
Prospectus [Line Items]
Risk [Text Block]	Concentration. The Fund’s strategy of concentrating in health care and related companies means that its performance will be closely tied to the performance of a particular market segment. The Fund’s concentration in these companies may present more risks than if it were broadly diversified over numerous industries and sectors of the economy. A downturn in these companies would have a larger impact on the Fund than on a mutual fund that does not concentrate in such companies. At times, the performance of these companies will lag the performance of other industries or the broader market as a whole.
Growth Investing [Member]
Prospectus [Line Items]
Risk [Text Block]	Growth Investing. Growth stocks can react differently to issuer, political, market and economic developments than the market as a whole and other types of stocks. Growth stocks tend to be more expensive relative to their earnings or assets compared to other types of stocks. As a result, because growth stocks tend to be sensitive to changes in their earnings and to increasing interest rates and inflation, they tend to be more volatile than other types of stocks. In response, from time to time, growth investing as an investment style may go out of favor with investors.
General Stock Market [Member]
Prospectus [Line Items]
Risk [Text Block]	General Stock Market. Fund losses may be incurred due to declines in one or more markets in which Fund investments are made. These declines may be the result of, among other things, political, regulatory, market, economic or social developments affecting the relevant market(s). In addition, turbulence as has recently been experienced, caused, among other reasons, by increased inflation, tightening monetary policy and interest rate increases by the US Federal Reserve or similar international bodies, and changes in U.S. trade policy. Reduced liquidity in financial markets may continue to negatively affect many issuers, which could have an adverse effect on your Fund investment. Events involving limited liquidity, defaults, non-performance or other adverse developments that affect one industry, such as the financial services industry, or concerns or rumors about any events of these kinds, have in the past and may in the future lead to market-wide liquidity problems, may spread to other industries, and could negatively affect the value and liquidity of the Fund’s investments. Global economies and financial markets are increasingly interconnected, and conditions and events in one country, region or financial market, such as Russia’s invasion of Ukraine in February 2022 and the world-wide response to it, have and may continue to adversely impact issuers and markets worldwide. Increasingly strained relations between countries, including between the U.S. and traditional allies and/or adversaries, could adversely affect U.S. issuers as well as non-U.S. issuers that rely on the United States for trade. A fund’s securities may be negatively impacted by inflation (or expectations for inflation), interest rates, global demand for particular products/services or resources, supply chain disruptions, natural disasters, pandemics, epidemics, terrorism, war, military confrontations, changes in trade regulations, elevated levels of government debt, internal unrest and discord, economic sanctions, regulatory events and governmental or quasi-governmental actions, among others. Ongoing armed conflicts between Russia and Ukraine in Europe and among Israel, Iran, Hamas and other militant groups in the Middle East, including the joint U.S.-Israeli strikes on Iran in February 2026, present considerable market risks, the ultimate effects of which are not known but could profoundly affect global economies and markets. Raising the ceiling on U.S. government debt has become increasingly politicized. Any failure to increase the total amount that the U.S. government is authorized to borrow could lead to a default on U.S. government obligations, with unpredictable consequences for economies and markets in the U.S. and elsewhere.
Non U S Securities [Member]
Prospectus [Line Items]
Risk [Text Block]	Non‑U.S. Securities. Investing in non‑U.S. securities may involve additional risks to those inherent in investing in U.S. securities, including exchange rate fluctuations, political or economic instability, the imposition of exchange controls, expropriation, limited disclosure and illiquid markets.
Small and Mid Sized Companies [Member]
Prospectus [Line Items]
Risk [Text Block]	Small-and Mid‑Sized Companies. The Adviser believes there is more potential for capital appreciation in small-and mid‑sized companies, but there also may be more risk. Securities of small-and mid‑sized companies may not be well known to most investors, and the securities may be less actively traded than those of large businesses. The securities of small-and mid‑sized companies may fluctuate in price more widely than the stock market generally, and they may be more difficult to sell during market downturns. Small-and mid‑sized companies rely more on the skills of management and on their continued tenure. Investing in small-and mid‑sized companies requires a long-term outlook and may require shareholders to assume more risk and to have more patience than investing in the securities of larger, more established companies.
Health Care Sectors [Member]
Prospectus [Line Items]
Risk [Text Block]	Health Care Sector. Investments in health care companies are subject to a number of risks, including the adverse impact of legislative actions and government regulations. These actions and regulations can affect the approval process for patents, medical devices and drugs, the funding of research and medical care programs, and the operation and licensing of facilities and personnel. Biotechnology and related companies are affected by patent considerations, intense competition, rapid technology change and obsolescence, and regulatory requirements of various federal and state agencies. In addition, some of these companies are relatively small and have thinly traded securities, may not yet offer products or may offer a single product, and may have persistent losses during a new product’s transition from development to production, or erratic revenue patterns. The stock prices of these companies are very volatile, particularly when their products are up for regulatory approval and/or under regulatory scrutiny.
Risk Lose Money [Member]
Prospectus [Line Items]
Risk [Text Block]	Fund losses may be incurred due to declines in one or more markets in which Fund investments are made.
Risk Nondiversified Status [Member]
Prospectus [Line Items]
Risk [Text Block]	Non‑Diversified Portfolio. The Fund is non‑diversified, which means it may have a greater percentage of its assets in a single issuer than a diversified fund. Because of this, a non‑diversified fund may invest a greater percentage of its assets in fewer issuers, and the performance of those issuers may have a greater effect on the performance of a non‑diversified fund versus a diversified fund. Thus, a non‑diversified fund is more likely to experience significant fluctuations in value, exposing the Fund to a greater risk of loss in any given period than a diversified fund.

S000061847 [Member] Investment Risks - Baron Health Care Fund

Dec. 31, 2025

Concentration. The Fund’s strategy of concentrating in health care and related companies means that its performance will be closely tied to the performance of a particular market segment. The Fund’s concentration in these companies may present more risks than if it were broadly diversified over numerous industries and sectors of the economy. A downturn in these companies would have a larger impact on the Fund than on a mutual fund that does not concentrate in such companies. At times, the performance of these companies will lag the performance of other industries or the broader market as a whole.

Prospectus [Line Items]

Risk [Text Block]

Growth Investing. Growth stocks can react differently to issuer, political, market and economic developments than the market as a whole and other types of stocks. Growth stocks tend to be more expensive relative to their earnings or assets compared to other types of stocks. As a result, because growth stocks tend to be sensitive to changes in their earnings and to increasing interest rates and inflation, they tend to be more volatile than other types of stocks. In response, from time to time, growth investing as an investment style may go out of favor with investors.

General Stock Market [Member]

Prospectus [Line Items]

Risk [Text Block]

General Stock Market. Fund losses may be incurred due to declines in one or more markets in which Fund investments are made. These declines may be the result of,

among other things, political, regulatory, market, economic or social developments affecting the relevant market(s). In addition, turbulence as has recently been experienced, caused, among other reasons, by increased inflation, tightening monetary policy and interest rate increases by the US Federal Reserve or similar international bodies, and changes in U.S. trade policy. Reduced liquidity in financial markets may continue to negatively affect many issuers, which could have an adverse effect on your Fund investment. Events involving limited liquidity, defaults, non-performance or other adverse developments that affect one industry, such as the financial services industry, or concerns or rumors about any events of these kinds, have in the past and may in the future lead to market-wide liquidity problems, may spread to other industries, and could negatively affect the value and liquidity of the Fund’s investments. Global economies and financial markets are increasingly interconnected, and conditions and events in one country, region or financial market, such as Russia’s invasion of Ukraine in February 2022 and the world-wide response to it, have and may continue to adversely impact issuers and markets worldwide. Increasingly strained relations between countries, including between the U.S. and traditional allies and/or adversaries, could adversely affect U.S. issuers as well as non-U.S. issuers that rely on the United States for trade. A fund’s securities may be negatively impacted by inflation (or expectations for inflation), interest rates, global demand for particular products/services or resources, supply chain disruptions, natural disasters, pandemics, epidemics, terrorism, war, military confrontations, changes in trade regulations, elevated levels of government debt, internal unrest and discord, economic sanctions, regulatory events and governmental or quasi-governmental actions, among others. Ongoing armed conflicts between Russia and Ukraine in Europe and among Israel, Iran, Hamas and other militant groups in the Middle East, including the joint U.S.-Israeli strikes on Iran in February 2026, present considerable market risks, the ultimate effects of which are not known but could profoundly affect global economies and markets. Raising the ceiling on U.S. government debt has become increasingly politicized. Any failure to increase the total amount that the U.S. government is authorized to borrow could lead to a default on U.S. government obligations, with unpredictable consequences for economies and markets in the U.S. and elsewhere.

Non U S Securities [Member]

Prospectus [Line Items]

Risk [Text Block]

Non‑U.S. Securities. Investing in non‑U.S. securities may involve additional risks to those inherent in investing in U.S. securities, including exchange rate fluctuations, political or economic instability, the imposition of exchange controls, expropriation, limited disclosure and illiquid markets.

Small and Mid Sized Companies [Member]

Prospectus [Line Items]

Risk [Text Block]

Small-and Mid‑Sized Companies. The Adviser believes there is more potential for capital appreciation in small-and mid‑sized companies, but there also may be more risk. Securities of small-and mid‑sized companies may not be well known to most investors, and the securities may be less actively traded than those of large businesses. The securities of small-and mid‑sized companies may fluctuate in price

more widely than the stock market generally, and they may be more difficult to sell during market downturns. Small-and mid‑sized companies rely more on the skills of management and on their continued tenure. Investing in small-and mid‑sized companies requires a long-term outlook and may require shareholders to assume more risk and to have more patience than investing in the securities of larger, more established companies.

Health Care Sectors [Member]

Prospectus [Line Items]

Risk [Text Block]

Health Care Sector. Investments in health care companies are subject to a number of risks, including the adverse impact of legislative actions and government regulations. These actions and regulations can affect the approval process for patents, medical devices and drugs, the funding of research and medical care programs, and the operation and licensing of facilities and personnel. Biotechnology and related companies are affected by patent considerations, intense competition, rapid technology change and obsolescence, and regulatory requirements of various federal and state agencies. In addition, some of these companies are relatively small and have thinly traded securities, may not yet offer products or may offer a single product, and may have persistent losses during a new product’s transition from development to production, or erratic revenue patterns. The stock prices of these companies are very volatile, particularly when their products are up for regulatory approval and/or under regulatory scrutiny.

Risk Lose Money [Member]

Prospectus [Line Items]

Risk [Text Block]

Fund losses may be incurred due to declines in one or more markets in which Fund investments are made.

Risk Nondiversified Status [Member]

Prospectus [Line Items]

Risk [Text Block]

Non‑Diversified Portfolio. The Fund is non‑diversified, which means it may have a greater percentage of its assets in a single issuer than a diversified fund. Because of this, a non‑diversified fund may invest a greater percentage of its assets in fewer issuers, and the performance of those issuers may have a greater effect on the performance of a non‑diversified fund versus a diversified fund. Thus, a non‑diversified fund is more likely to experience significant fluctuations in value, exposing the Fund to a greater risk of loss in any given period than a diversified fund.