| N-2 | 6 Months Ended |
| Jun. 30, 2024 $ / shares shares |
| Cover [Abstract] | |
| Entity Central Index Key | 0001275617 |
| Amendment Flag | false |
| Document Type | N-CSRS |
| Entity Registrant Name | Cohen & Steers Infrastructure Fund, Inc. |
| General Description of Registrant [Abstract] | |
| Investment Objectives and Practices [Text Block] | The Fund’s investment objective is total return with emphasis on income. |
| Risk Factors [Table Text Block] | Note 8. Other Risks Market Price Discount from Net Asset Value Risk: shares. Because the market price of the shares is determined by factors such as relative supply of and demand for shares in the market, general market and economic conditions, and other factors beyond the control of the Fund, the shares may trade at, above or below NAV. Common Stock Risk: Infrastructure Companies Risk: Foreign Currency and Currency Hedging Risk: interest payments in foreign currencies. Therefore, the Fund’s investments in foreign securities will be subject to foreign currency risk, which means that the Fund’s NAV could decline as a result of changes in the exchange rates between foreign currencies and the U.S. dollar. Certain foreign countries may impose restrictions on the ability of issuers of foreign securities to make payment of principal, dividends and interest to investors located outside the country, due to blockage of foreign currency exchanges or otherwise. The Fund may, but is not required to, engage in various instruments that are designed to hedge the Fund’s foreign currency risks. If the Fund were to utilize derivatives for the purpose of hedging foreign currency risks, it would be subject to risks different from, and possibly greater than, the risks associated with investing directly in traditional securities. Among the risks presented are counterparty risk, financial leverage risk, liquidity risk, OTC trading risk and tracking risk. The use of derivatives can lead to losses because of adverse movements in the price or value of the underlying asset, index or rate, which may be magnified by certain features of the derivatives. Foreign (Non‑U.S.) and Emerging Market Securities Risk: Securities of companies in emerging markets may be more volatile than those of companies in more developed markets. Emerging market countries generally have less developed markets and economies and, in some countries, less mature governments and governmental institutions. Political developments in foreign countries or the United States may at times subject such countries to sanctions from the U.S. government, foreign governments and/or international institutions that could negatively affect a Fund’s investments in issuers located in, doing business in or with assets in such countries. Investing in securities of companies in emerging markets may entail special risks relating to potential economic, political or social instability and the risks of expropriation, nationalization, confiscation, trade sanctions or embargoes or the imposition of restrictions on foreign investment, the lack of hedging instruments, and repatriation of capital invested. The securities and real estate markets of some emerging market countries have in the past experienced substantial market disruptions and may do so in the future. The economies of many emerging market countries may be heavily dependent on international trade and have thus been, and may continue to be, adversely affected by trade barriers, foreign exchange controls and other protectionist measures imposed or negotiated by the countries with which they wish to trade. Master Limited Partnership Risk: assets of the MLPs and risks associated with pooled investment vehicles. MLPs holding credit-related investments are subject to interest rate risk and the risk of default on payment obligations by debt issuers. MLPs that concentrate in a particular industry or a particular geographic region are subject to risks associated with such industry or region. The benefit derived from the Fund’s investment in MLPs is largely dependent on the MLPs being treated as partnerships for federal income tax purposes. Weakening energy market fundamentals may increase counterparty risk and impact MLP profitability. Specifically, energy companies suffering financial distress may be able to abrogate contracts with MLPs, decreasing or eliminating sources of revenue. Leverage Risk: Preferred Securities Risk: Generally, preferred security holders have no voting rights with respect to the issuing company unless certain events occur. Certain preferred securities may give the issuers special redemption rights allowing the securities to be redeemed prior to a specified date if certain events occur, such as changes to tax or securities laws. Credit and Below-Investment-Grade Securities Risk: Geopolitical Risk: Russia’s military invasion of Ukraine has significantly amplified already existing geopolitical tensions. The United States and many other countries have instituted various economic sanctions against Russia, Russian individuals and entities and Belarus. The extent and duration of the military action, sanctions imposed and other punitive actions taken (including any Russian retaliatory responses to such sanctions and actions), and resulting disruptions in Europe and globally cannot be predicted, but could be significant and have a severe adverse effect on the global economy, securities markets and commodities markets globally, including through global supply chain disruptions, increased inflationary pressures and reduced economic activity. Ongoing conflicts in the Middle East could have similar negative impacts. Systemic risk events in the financial sectors and/or resulting government actions can negatively impact the Fund. For example, issues with certain regional U.S. banks and other financial institutions in March 2023 raised economic concerns over disruption in the U.S. banking system. These risks also may adversely affect financial intermediaries, such as clearing agencies, clearing houses, banks, securities firms, and exchanges, with which the Fund interacts. There can be no certainty that any actions taken by the U.S. government to strengthen public confidence in the U.S. banking system or financial markets will be effective in mitigating the effects of financial institution failures on the economy and restoring or maintaining public confidence. The strengthening or weakening of the U.S. dollar relative to other currencies may, among other things, adversely affect the Fund’s investments denominated in non‑U.S. dollar currencies. It is difficult to predict when similar events affecting the U.S. or global financial markets may occur, the effects that such events may have, and the duration of those effects. The rapid development and increasingly widespread use and regulation of artificial intelligence, including machine learning technology and generative artificial intelligence such as ChatGPT (collectively, AI Technologies), may pose risks to the Fund. For instance, the global economy may be significantly disrupted or otherwise adversely impacted by the rapid advanced development of AI Technologies and by efforts to regulate or control its use and advancement. The legal and regulatory frameworks within which AI Technologies operate continue to rapidly evolve, and it is not possible to predict the full extent of current or future risks related thereto. Some political leaders around the world (including in the U.S. and certain European nations) have been elected on protectionist platforms, raising questions about the future of global free trade. Global trade disruption, significant introductions of trade barriers and bilateral trade frictions, together with any future downturns in the global economy resulting therefrom, could adversely affect the financial performance of the Fund and its investments. Regulatory Risk: In May 2024, the standard settlement cycle for numerous types of U.S. securities, including Fund shares and many of the securities the Fund invests in, moved from two business days after the transaction date (T+2) to the next business day after the transaction date (T+1). This reduced settlement cycle may result in additional risks and costs to the Fund, including increased operational risks associated with the resolution of trade breaks and exceptions. These risks will be heightened in light of certain Fund investments (such as certain non‑U.S. securities) that have longer settlement cycles than is expected of Fund shares. Additional legislative or regulatory actions to address perceived liquidity or other issues in markets generally, or in particular markets such as the fixed income securities markets and municipal securities markets, may alter or impair certain market participants’ ability to utilize certain investment strategies and techniques. The Fund and the instruments in which it invests may be subject to new or additional regulatory constraints in the future. While the full extent of all of these regulations is still unclear, these regulations and actions may adversely affect both the Fund and the instruments in which the Fund invests and its ability to execute its investment strategy. For example, climate change regulation (such as decarbonization legislation, other mandatory controls to reduce emissions of greenhouse gases, or related disclosure requirements) could significantly affect the Fund or its investments by, among other things, increasing compliance costs or underlying companies’ operating costs and capital expenditures. Similarly, regulatory developments in other countries may have an unpredictable and adverse impact on the Fund. |
| Share Price | $ 22.48 |
| NAV Per Share | $ 22.64 |
| Latest Premium (Discount) to NAV [Percent] | (0.71%) |
| Capital Stock, Long-Term Debt, and Other Securities [Abstract] | |
| Capital Stock [Table Text Block] | The Fund is authorized to issue 300 million shares of common stock at a par value of $0.001 per share. During the six months ended June 30, 2024, the Fund issued 150,428 shares of common stock at $3,409,793 for the reinvestment of dividends. During the year ended December 31, 2023, the Fund issued 140,170 shares of common stock at $3,330,799 for the reinvestment of dividends. On December 12, 2023, the Board of Directors approved the continuation of the delegation of its authority to management to effect repurchases, pursuant to management’s discretion and subject to market conditions and investment considerations, of up to 10% of the Fund’s common shares outstanding as of January 1, 2024 through December 31, 2024. During the six months ended June 30, 2024 and year ended December 31, 2023, the Fund did not effect any repurchases. On August 5, 2021, the Fund filed with the SEC an automatically effective shelf registration statement on Form N‑2 allowing for the delayed or continuous offering of up to $225,000,000 aggregate initial offering price of shares of common stock or rights to subscribe for shares of common stock. On August 9, 2021, the Fund entered into a Distribution Agreement with Foreside Fund Services, LLC (the “Distributor”), pursuant to which the Fund may offer and sell up to 7,750,000 shares of common stock, from time to time, through the Distributor, in transactions that are deemed to be “at the market” as defined in Rule 415 under the Securities Act of 1933, and filed a prospectus supplement with respect to such at‑the‑market program. The minimum price on any day at which shares of common stock may be sold will not be less than the then current NAV per common share plus any commissions to be paid to the Distributor. Certain offering costs incurred by the Fund in connection with the shelf offering are recorded as a deferred charge which are amortized over the period such additional common shares are sold, not to exceed one year. For the six months ended June 30, 2024, the Fund did not sell shares of common stock in the at‑the‑market program. For the year ended December 31, 2023 the Fund sold 375,370 shares of common stock in the at‑the‑market program and the proceeds from such sales were $9,166,432, net of offering costs and sales charges of $8,061 and $74,026, respectively. On August 5, 2024, the Fund’s shelf registration statement expired and therefore the Fund is not permitted to sell shares in the at‑the‑market program until such time as the Fund has an effective registration statement. |
| Security Voting Rights [Text Block] | Generally, preferred security holders have no voting rights with respect to the issuing company unless certain events occur. Certain preferred securities may give the issuers special redemption rights allowing the securities to be redeemed prior to a specified date if certain events occur, such as changes to tax or securities laws. |
| Outstanding Security, Held [Shares] | shares | 96,486,405 |
| Market Price Discount from Net Asset Value Risk [Member] | |
| General Description of Registrant [Abstract] | |
| Risk [Text Block] | Market Price Discount from Net Asset Value Risk: shares. Because the market price of the shares is determined by factors such as relative supply of and demand for shares in the market, general market and economic conditions, and other factors beyond the control of the Fund, the shares may trade at, above or below NAV. |
| Common Stock Risk [Member] | |
| General Description of Registrant [Abstract] | |
| Risk [Text Block] | Common Stock Risk: |
| Infrastructure Companies Risk [Member] | |
| General Description of Registrant [Abstract] | |
| Risk [Text Block] | Infrastructure Companies Risk: |
| Foreign Currency and Currency Hedging Risk [Member] | |
| General Description of Registrant [Abstract] | |
| Risk [Text Block] | Foreign Currency and Currency Hedging Risk: interest payments in foreign currencies. Therefore, the Fund’s investments in foreign securities will be subject to foreign currency risk, which means that the Fund’s NAV could decline as a result of changes in the exchange rates between foreign currencies and the U.S. dollar. Certain foreign countries may impose restrictions on the ability of issuers of foreign securities to make payment of principal, dividends and interest to investors located outside the country, due to blockage of foreign currency exchanges or otherwise. The Fund may, but is not required to, engage in various instruments that are designed to hedge the Fund’s foreign currency risks. If the Fund were to utilize derivatives for the purpose of hedging foreign currency risks, it would be subject to risks different from, and possibly greater than, the risks associated with investing directly in traditional securities. Among the risks presented are counterparty risk, financial leverage risk, liquidity risk, OTC trading risk and tracking risk. The use of derivatives can lead to losses because of adverse movements in the price or value of the underlying asset, index or rate, which may be magnified by certain features of the derivatives. |
| Foreign Non US and Emerging Market Securities Risk [Member] | |
| General Description of Registrant [Abstract] | |
| Risk [Text Block] | Foreign (Non‑U.S.) and Emerging Market Securities Risk: Securities of companies in emerging markets may be more volatile than those of companies in more developed markets. Emerging market countries generally have less developed markets and economies and, in some countries, less mature governments and governmental institutions. Political developments in foreign countries or the United States may at times subject such countries to sanctions from the U.S. government, foreign governments and/or international institutions that could negatively affect a Fund’s investments in issuers located in, doing business in or with assets in such countries. Investing in securities of companies in emerging markets may entail special risks relating to potential economic, political or social instability and the risks of expropriation, nationalization, confiscation, trade sanctions or embargoes or the imposition of restrictions on foreign investment, the lack of hedging instruments, and repatriation of capital invested. The securities and real estate markets of some emerging market countries have in the past experienced substantial market disruptions and may do so in the future. The economies of many emerging market countries may be heavily dependent on international trade and have thus been, and may continue to be, adversely affected by trade barriers, foreign exchange controls and other protectionist measures imposed or negotiated by the countries with which they wish to trade. |
| Master Limited Partnership Risk [Member] | |
| General Description of Registrant [Abstract] | |
| Risk [Text Block] | Master Limited Partnership Risk: assets of the MLPs and risks associated with pooled investment vehicles. MLPs holding credit-related investments are subject to interest rate risk and the risk of default on payment obligations by debt issuers. MLPs that concentrate in a particular industry or a particular geographic region are subject to risks associated with such industry or region. The benefit derived from the Fund’s investment in MLPs is largely dependent on the MLPs being treated as partnerships for federal income tax purposes. Weakening energy market fundamentals may increase counterparty risk and impact MLP profitability. Specifically, energy companies suffering financial distress may be able to abrogate contracts with MLPs, decreasing or eliminating sources of revenue. |
| Leverage Risk [Member] | |
| General Description of Registrant [Abstract] | |
| Risk [Text Block] | Leverage Risk: |
| Preferred Securities Risk [Member] | |
| General Description of Registrant [Abstract] | |
| Risk [Text Block] | Preferred Securities Risk: Generally, preferred security holders have no voting rights with respect to the issuing company unless certain events occur. Certain preferred securities may give the issuers special redemption rights allowing the securities to be redeemed prior to a specified date if certain events occur, such as changes to tax or securities laws. |
| Credit and Below Investment Grade Securities Risk [Member] | |
| General Description of Registrant [Abstract] | |
| Risk [Text Block] | Credit and Below-Investment-Grade Securities Risk: |
| Geopolitical Risk [Member] | |
| General Description of Registrant [Abstract] | |
| Risk [Text Block] | Geopolitical Risk: Russia’s military invasion of Ukraine has significantly amplified already existing geopolitical tensions. The United States and many other countries have instituted various economic sanctions against Russia, Russian individuals and entities and Belarus. The extent and duration of the military action, sanctions imposed and other punitive actions taken (including any Russian retaliatory responses to such sanctions and actions), and resulting disruptions in Europe and globally cannot be predicted, but could be significant and have a severe adverse effect on the global economy, securities markets and commodities markets globally, including through global supply chain disruptions, increased inflationary pressures and reduced economic activity. Ongoing conflicts in the Middle East could have similar negative impacts. Systemic risk events in the financial sectors and/or resulting government actions can negatively impact the Fund. For example, issues with certain regional U.S. banks and other financial institutions in March 2023 raised economic concerns over disruption in the U.S. banking system. These risks also may adversely affect financial intermediaries, such as clearing agencies, clearing houses, banks, securities firms, and exchanges, with which the Fund interacts. There can be no certainty that any actions taken by the U.S. government to strengthen public confidence in the U.S. banking system or financial markets will be effective in mitigating the effects of financial institution failures on the economy and restoring or maintaining public confidence. The strengthening or weakening of the U.S. dollar relative to other currencies may, among other things, adversely affect the Fund’s investments denominated in non‑U.S. dollar currencies. It is difficult to predict when similar events affecting the U.S. or global financial markets may occur, the effects that such events may have, and the duration of those effects. The rapid development and increasingly widespread use and regulation of artificial intelligence, including machine learning technology and generative artificial intelligence such as ChatGPT (collectively, AI Technologies), may pose risks to the Fund. For instance, the global economy may be significantly disrupted or otherwise adversely impacted by the rapid advanced development of AI Technologies and by efforts to regulate or control its use and advancement. The legal and regulatory frameworks within which AI Technologies operate continue to rapidly evolve, and it is not possible to predict the full extent of current or future risks related thereto. Some political leaders around the world (including in the U.S. and certain European nations) have been elected on protectionist platforms, raising questions about the future of global free trade. Global trade disruption, significant introductions of trade barriers and bilateral trade frictions, together with any future downturns in the global economy resulting therefrom, could adversely affect the financial performance of the Fund and its investments. |
| Regulatory Risk [Member] | |
| General Description of Registrant [Abstract] | |
| Risk [Text Block] | Regulatory Risk: In May 2024, the standard settlement cycle for numerous types of U.S. securities, including Fund shares and many of the securities the Fund invests in, moved from two business days after the transaction date (T+2) to the next business day after the transaction date (T+1). This reduced settlement cycle may result in additional risks and costs to the Fund, including increased operational risks associated with the resolution of trade breaks and exceptions. These risks will be heightened in light of certain Fund investments (such as certain non‑U.S. securities) that have longer settlement cycles than is expected of Fund shares. Additional legislative or regulatory actions to address perceived liquidity or other issues in markets generally, or in particular markets such as the fixed income securities markets and municipal securities markets, may alter or impair certain market participants’ ability to utilize certain investment strategies and techniques. The Fund and the instruments in which it invests may be subject to new or additional regulatory constraints in the future. While the full extent of all of these regulations is still unclear, these regulations and actions may adversely affect both the Fund and the instruments in which the Fund invests and its ability to execute its investment strategy. For example, climate change regulation (such as decarbonization legislation, other mandatory controls to reduce emissions of greenhouse gases, or related disclosure requirements) could significantly affect the Fund or its investments by, among other things, increasing compliance costs or underlying companies’ operating costs and capital expenditures. Similarly, regulatory developments in other countries may have an unpredictable and adverse impact on the Fund. |
