Class K [Member] Investment Strategy - Class K - BLACKROCK EMERGING MARKETS FUND, INC.	Apr. 30, 2026
Prospectus [Line Items]
Strategy [Heading]	Principal Investment Strategies of the Fund
Strategy Narrative [Text Block]	Under normal conditions, the Fund invests at least 80% of its net assets plus any borrowings for investment purposes in equity securities of issuers located in countries with developing capital markets. With respect to such equity investments, investments in derivatives are counted toward the Fund’s 80% policy to the extent that they provide investment exposure to the securities included within that policy or to one or more market risk factors associated with such securities. Equity securities consist primarily of common and preferred stocks and depositary receipts, and include securities or other instruments whose price is linked to the value of common stock. The Fund may also invest in securities convertible into common stock. A developing capital market is the market of any country that the World Bank, the International Finance Corporation, the United Nations or its authorities have determined to have a low or middle income economy. Countries with developing capital markets can be found in regions such as Asia, Latin America, Eastern Europe and Africa. For this purpose, developing capital markets include, but are not limited to, the markets of all countries that comprise the MSCI Emerging Markets Index. The Fund may also consider an issuer to be located in a country that has a developing capital market if at least 50% of the issuer’s assets, gross revenues or profits in any one of the last two years represents assets or activities located in such countries. The Fund may invest up to 20% of its assets in equity securities of issuers domiciled in the People’s Republic of China (“China” or the “PRC” and, for the purpose of this policy, excluding Hong Kong, Macau and Taiwan) and listed in China that are accessible through the Shanghai-Hong Kong Stock Connect program or the Shenzhen-Hong Kong Stock Connect program (collectively, “Stock Connect”). The Fund may also invest in fixed income securities issued by companies and governments in these countries, as well as mezzanine investments. The Fund normally invests in at least three countries at any given time. The Fund can invest in securities denominated in either U.S. dollars or foreign currencies. The Fund has not established any rating or maturity criteria for the debt securities in which it may invest. From time to time the Fund may invest in shares of companies through initial public offerings (“IPOs”). Fund management may, when consistent with the Fund’s investment objective, buy or sell options or futures on a security or an index of securities, or enter into interest rate or foreign currency transactions, including swaps (collectively, commonly known as derivatives). The Fund’s exposure to certain markets may be effected through investments in participation notes or other structured or derivative instruments that are designed to replicate, or otherwise provide exposure to, the performance of securities listed in such markets.

Under normal conditions, the Fund invests at least 80% of its net assets plus any borrowings for investment purposes in equity securities of issuers located in countries with developing capital markets. With respect to such equity investments, investments in derivatives are counted toward the Fund’s 80% policy to the extent that they provide investment exposure to the securities included within that policy or to one or more market risk factors associated with such securities. Equity securities consist primarily of common and preferred stocks and depositary receipts, and include securities or other instruments whose price is linked to the value of common stock. The Fund may also invest in securities convertible into common stock. A developing capital market is the market of any country that the World Bank, the International Finance Corporation, the United Nations or its authorities have determined to have a low or middle income economy. Countries with developing capital markets can be found in regions such as Asia, Latin America, Eastern Europe and Africa. For this purpose, developing capital markets include, but are not limited to, the markets of all countries that comprise the MSCI Emerging Markets Index. The Fund may also consider an issuer to be located in a country that has a developing capital market if at least 50% of the issuer’s assets, gross revenues or profits in any one of the last two years represents assets or activities located in such countries.

The Fund may invest up to 20% of its assets in equity securities of issuers domiciled in the People’s Republic of China (“China” or the “PRC” and, for the purpose of this policy, excluding Hong Kong, Macau and Taiwan) and listed in China that are accessible through the Shanghai-Hong Kong Stock Connect program or the Shenzhen-Hong Kong Stock Connect program (collectively, “Stock Connect”).

The Fund may also invest in fixed income securities issued by companies and governments in these countries, as well as mezzanine investments. The Fund normally invests in at least three countries at any given time. The Fund can invest in securities denominated in either U.S. dollars or foreign currencies. The Fund has not established any rating or maturity criteria for the debt securities in which it may invest. From time to time the Fund may invest in shares of companies through initial public offerings (“IPOs”).

Fund management may, when consistent with the Fund’s investment objective, buy or sell options or futures on a security or an index of securities, or enter into interest rate or foreign currency transactions, including swaps (collectively, commonly known as derivatives). The Fund’s exposure to certain markets may be effected through investments in participation notes or other structured or derivative instruments that are designed to replicate, or otherwise provide exposure to, the performance of securities listed in such markets.