Investment Risks |
Jun. 25, 2026 |
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| Invesco AMT-Free Municipal Income Fund | Invesco AMT-Free Municipal Income Fund | Risk Lose Money [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | The Fund could lose money on investments in debt securities if the issuer or borrower fails to meet its obligations to make interest payments and/or to repay principal in a timely manner. |
| Invesco AMT-Free Municipal Income Fund | Invesco AMT-Free Municipal Income Fund | Risk Not Insured [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | An investment in the Fund is not a deposit in a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other governmental agency. |
| Invesco AMT-Free Municipal Income Fund | Invesco AMT-Free Municipal Income Fund | Risk Money Market Fund Price Fluctuates [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | The values of high yield debt securities often fluctuate more in response to political, regulatory or economic developments than higher quality bonds, and their values can decline significantly over short periods of time or during periods of economic difficulty when the bonds could be difficult to value or sell at an acceptable price, thus subjecting the Fund to a substantial risk of loss. |
| Invesco AMT-Free Municipal Income Fund | Invesco AMT-Free Municipal Income Fund | Market Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Market Risk. The market values of the Fund’s investments, and therefore the value of the Fund’s shares, will go up and down, sometimes rapidly or unpredictably. Market risk may affect a single issuer, industry or section of the economy, or it may affect the market as a whole. The value of the Fund’s investments may go up or down due to general market conditions that are not specifically related to the particular issuer. These market conditions may include real or perceived adverse economic conditions, changes in trade regulation or economic sanctions, changes in the general outlook for revenues or corporate earnings, changes in interest or currency rates, regional or global instability and uncertainty, natural or environmental disasters, widespread disease or other public health issues, war, military conflict, acts of terrorism, economic crisis or adverse investor sentiment generally, among others. Certain changes in the U.S. economy in particular, such as when the U.S. economy weakens or when its financial markets decline, may have a material adverse effect on global financial markets as a whole, and on the securities to which the Fund has exposure. Increasingly strained relations between the U.S. and foreign countries, including as a result of economic sanctions and tariffs, may also adversely affect U.S. issuers, as well as non-U.S. issuers.
During a general downturn in the financial markets, multiple asset classes may decline in value. When markets perform well, there can be no assurance that specific investments held by the Fund will rise in value.
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| Invesco AMT-Free Municipal Income Fund | Invesco AMT-Free Municipal Income Fund | Debt Securities Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Debt Securities Risk. The prices of debt securities held by the Fund will be affected by changes in interest rates, the creditworthiness of the issuer and other factors. An increase in prevailing interest rates typically causes the value of existing debt securities to fall and often has a greater impact on longer-duration debt securities and higher quality debt securities. Falling interest rates will cause the Fund to reinvest the proceeds of debt securities that have been repaid by the issuer at lower interest rates. Falling interest rates may also reduce the Fund’s distributable income because interest payments on floating rate debt instruments held by the Fund will decline. The Fund could lose money on investments in debt securities if the issuer or borrower fails to meet its obligations to make interest payments and/or to repay principal in a timely manner. Changes in an issuer’s financial strength, the market’s perception of such strength or in the credit rating of the issuer or the security may affect the value of debt securities. The credit analysis applied to the Fund’s debt securities may fail to anticipate such changes, which could result in buying a debt security at an inopportune time or failing to sell a debt security in advance of a price decline or other credit event.
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| Invesco AMT-Free Municipal Income Fund | Invesco AMT-Free Municipal Income Fund | Municipal Securities Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] |
Municipal Securities Risk. The risk of a municipal obligation generally depends on the financial and credit status of the issuer. Constitutional amendments, legislative enactments, executive orders, administrative regulations, voter initiatives, and the issuer’s regional economic conditions may affect the municipal security’s value, interest payments, repayment of principal and the Fund’s ability to sell the security.
The amount of public information available about municipal securities is generally less than that for corporate equities or bonds; these limitations on access to information needed to assess the creditworthiness of a municipal security could negatively impact its liquidity.
The secondary market for certain municipal securities tends to be less well developed or liquid than many other securities markets, which may adversely affect the fund's ability to buy or sell such municipal securities at acceptable prices. Investments that are illiquid or that trade in lower volumes may be more difficult to value.
Failure of a municipal security issuer to comply with applicable tax requirements may make income paid thereon taxable, resulting in a decline in the security’s value. In addition, there could be changes in applicable tax laws or tax treatments that reduce or eliminate the current federal income tax exemption on municipal securities or otherwise adversely affect the current federal or state tax status of municipal securities.
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| Invesco AMT-Free Municipal Income Fund | Invesco AMT-Free Municipal Income Fund | Municipal Issuer Focus Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Municipal Issuer Focus Risk. The municipal issuers in which the Fund invests may be located in the same geographic area or may pay their interest obligations from revenue of similar projects, such as hospitals, airports, utility systems and housing finance agencies. This may make the Fund’s investments more susceptible to similar social, economic, political or regulatory occurrences, making the Fund more susceptible to experience a drop in its share price than if the Fund had been more diversified across issuers that did not have similar characteristics.
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| Invesco AMT-Free Municipal Income Fund | Invesco AMT-Free Municipal Income Fund | Investing in U.S. Territories, Commonwealths and Possessions Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Investing in U.S. Territories, Commonwealths and Possessions Risk. The Fund also invests in obligations of the governments of U.S. territories, commonwealths and possessions such as Puerto Rico, the U.S. Virgin Islands, Guam and the Northern Mariana Islands to the extent such obligations are exempt from regular federal individual income taxes. Accordingly, the Fund may be adversely affected by local political, economic, social and environmental conditions and developments, including natural disasters, within these U.S. territories, commonwealths and possessions affecting the issuers of such obligations.
Certain of the municipalities in which the Fund invests, including Puerto Rico, currently experience significant financial difficulties, which may include default, insolvency or bankruptcy. As a result, securities issued by certain of these municipalities are currently considered below-investment-grade securities. A credit rating downgrade relating to, default by, or insolvency or bankruptcy of, one or several municipal security issuers of a state, territory, commonwealth or possession in which the Fund invests could affect the payment of principal and interest, the market values and marketability of many or all municipal obligations of such state, territory, commonwealth or possession.
In the past several years, securities issued by Puerto Rico and its agencies and instrumentalities have been subject to multiple credit downgrades as a result of Puerto Rico’s ongoing fiscal challenges, growing debt obligations and uncertainty about its ability to make full repayment on these obligations, and certain issuers of Puerto Rican municipal securities have filed for bankruptcy and/or failed to make payments on obligations that have come due. Such developments could adversely impact the Fund’s performance and the Fund may pay expenses to preserve its claims related to its Puerto Rican holdings. The outcome of the debt restructuring of certain Puerto Rican issuers in which the Fund invests, both within and outside bankruptcy proceedings is uncertain, and could adversely affect the Fund.
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| Invesco AMT-Free Municipal Income Fund | Invesco AMT-Free Municipal Income Fund | Tobacco Related Bonds Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Tobacco Related Bonds Risk. The settlement payments made by tobacco manufacturers to certain U.S. states and jurisdictions pursuant to the Master Settlement Agreement (MSA) are based on factors, including, but not limited to, annual domestic cigarette shipments, cigarette consumption, inflation and the financial capability of participating tobacco companies. Payments could be reduced if tobacco consumption decreases, if market share is lost to non-MSA manufacturers, or if there is a negative outcome in litigation regarding the MSA, including challenges by participating tobacco manufacturers regarding the amount of annual payments owed under the MSA.
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| Invesco AMT-Free Municipal Income Fund | Invesco AMT-Free Municipal Income Fund | Land-Secured or “Dirt” Bonds Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Land-Secured or “Dirt” Bonds Risk. These bonds, which include special assessment, special tax, and tax increment financing bonds, are issued to promote residential, commercial and industrial growth and redevelopment. They are exposed to real estate development-related risks. The bonds could default if the developments failed to progress as anticipated or if taxpayers failed to pay the assessments, fees and taxes specified in the financing plans for a project.
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| Invesco AMT-Free Municipal Income Fund | Invesco AMT-Free Municipal Income Fund | Municipal Lease Obligations Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Municipal Lease Obligations Risk. Municipal lease obligations are used by state and local governments to obtain funds to acquire land, equipment or facilities. The Fund can invest in certificates of participation that represent a proportionate interest in payments made under municipal lease obligations. Most municipal lease obligations, while secured by the leased property, are not general obligations of the issuing municipality. They often contain “non-appropriation” clauses under which the municipal government has no obligation to make lease or installment payments in future years unless money is appropriated on a yearly basis.
If the municipal government stops making payments or transfers its payment obligations to a private entity, the obligation could lose value or become taxable. Although the obligation may be secured by the leased equipment or facilities, the disposition of the property in the event of non-appropriation or foreclosure might prove difficult, time consuming and costly, and may result in a delay in recovering or the failure to recover the original investment. Some lease obligations may not have an active trading market, making it difficult for the Fund to sell them quickly at an acceptable price.
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| Invesco AMT-Free Municipal Income Fund | Invesco AMT-Free Municipal Income Fund | Tax-Exempt Commercial Paper Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Tax-Exempt Commercial Paper Risk. Tax-exempt commercial paper is a short-term obligation with a stated maturity of usually 270 days or less. It is issued by state and local governments or their agencies to finance seasonal working capital needs or as short-term financing in anticipation of longer-term financing. While tax-exempt commercial paper is intended to be repaid from general revenues or refinanced, it frequently is backed by a letter of credit, lending arrangement, note, repurchase agreement or other credit facility agreement offered by a bank or financial institution. Because tax-exempt issuers may constantly reissue their commercial paper and use the proceeds (or other sources) to repay maturing paper, the commercial paper of a tax-exempt issuer that is unable to continue to obtain liquidity in that manner may default. There may be a limited secondary market for issues of tax-exempt commercial paper.
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| Invesco AMT-Free Municipal Income Fund | Invesco AMT-Free Municipal Income Fund | Unrated Securities Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Unrated Securities Risk. The Adviser may internally assign ratings to securities that are not rated by any nationally recognized statistical rating organization, after assessing their credit quality and other factors, in categories similar to those of nationally recognized statistical rating organizations. There can be no assurance, nor is it intended, that the Adviser’s credit analysis process is consistent or comparable with the credit analysis process used by a nationally recognized statistical rating organization. Unrated securities are considered “investment-grade” or “below-investment-grade” if judged by the Adviser to be comparable to rated investment-grade or below-investment-grade securities. The Adviser's rating does not constitute a guarantee of the credit quality. In addition, some unrated securities may not have an active trading market or may trade less actively than rated securities, which means that unrated securities may be difficult to sell promptly at an acceptable rate and may be more difficult to value.
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| Invesco AMT-Free Municipal Income Fund | Invesco AMT-Free Municipal Income Fund | High Yield Debt Securities (Junk Bond) Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | High Yield Debt Securities (Junk Bond) Risk. Compared to higher quality debt securities, high yield debt securities (also referred to as junk bonds or below-investment grade bonds) and other lower-rated securities involve a greater risk of default or price changes due to changes in the credit quality of the issuer. Compared to higher quality debt securities, high yield debt securities are more likely to be unsecured and are more likely to be subordinated to other creditors' claims. High yield debt securities are considered speculative with respect to the issuer’s capacity to pay interest and repay principal, are more susceptible to default or decline in market value and are less liquid than investment grade debt securities. Prices of high yield debt securities tend to be very volatile. The values of high yield
debt securities often fluctuate more in response to political, regulatory or economic developments than higher quality bonds, and their values can decline significantly over short periods of time or during periods of economic difficulty when the bonds could be difficult to value or sell at an acceptable price, thus subjecting the Fund to a substantial risk of loss. The secondary market for below investment grade securities may not be as liquid as the secondary market for more highly rated securities, a factor which may have an adverse effect on the fund's ability to dispose of a particular high yield security. There are fewer dealers in the market for high yield securities than for investment grade securities. The prices quoted by different dealers may vary significantly, and the spread between the bid and asked price is generally much larger for high yield securities than for higher quality securities.
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| Invesco AMT-Free Municipal Income Fund | Invesco AMT-Free Municipal Income Fund | Inverse Floating Rate Interests Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Inverse Floating Rate Interests Risk. Inverse floating rate interests (Inverse Floaters) are issued in connection with municipal tender option bond (TOB) financing transactions to generate leverage for the Fund. Such instruments are created by a special purpose trust (a TOB Trust) that holds long-term fixed rate bonds, sold to it by the Fund (the underlying security), and issues two classes of beneficial interests: short-term floating rate interests (Floaters), which are sold to other investors, and Inverse Floaters, which are purchased by the Fund. The Floaters have first priority on the cash flow from the underlying security held by the TOB Trust, have a tender option feature that allows holders to tender the Floaters back to the TOB Trust for their par amount and accrued interest at specified intervals and bear interest at prevailing short-term interest rates. Tendered Floaters are remarketed for sale to other investors for their par amount and accrued interest by a remarketing agent to the TOB Trust and are ultimately supported by a liquidity facility provided by a bank, upon which the TOB Trust can draw funds to pay such amount to holders of Tendered Floaters that cannot be remarketed. The Fund, as holder of the Inverse Floaters, is paid the residual cash flow from the underlying security. Accordingly, the Inverse Floaters provide the Fund with leveraged exposure to the underlying security. The price of Inverse Floaters is expected to decline when interest rates rise, and generally will decline more than the price of a bond with a similar maturity, because of the effect of leverage. The price of Inverse Floaters is typically more volatile than the price of bonds with similar maturities, especially if the relevant TOB Trust provides the holder of the Inverse Floaters relatively greater leveraged exposure to the underlying security (e.g., if the par amount of the Floaters, as a percentage of the par amount of the underlying security, is relatively greater). Further, as short-term interest rates rise, the interest payable on the Floaters issued by a TOB Trust also rises, leaving less residual interest cash flow from the underlying security available for payment on the Inverse Floaters. Additionally, Inverse Floaters may lose some or all of their principal and, in some cases, the Fund could lose money in excess of its investment in Inverse Floaters. Consequently, in a rising interest rate environment, the Fund’s investments in Inverse Floaters could negatively impact the Fund’s performance and yield, especially when those Inverse Floaters provide the Fund with relatively greater leveraged exposure to the relevant underlying securities.
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| Invesco AMT-Free Municipal Income Fund | Invesco AMT-Free Municipal Income Fund | Changing Fixed Income Market Conditions Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Changing Fixed Income Market Conditions Risk. Increases in the federal funds and equivalent foreign rates or other changes to monetary policy or regulatory actions may expose fixed income markets to heightened volatility, perhaps suddenly and to a significant degree, and to reduced liquidity for certain fixed income investments, particularly those with longer maturities. Such changes and resulting increased volatility may adversely impact the Fund, including its operations, universe of potential investment options, and return potential. It is difficult to predict the impact of interest rate changes on various markets. In addition, decreases in fixed income dealer market-making capacity may also potentially lead to heightened volatility and reduced liquidity in the fixed income markets. As a result, the value of the Fund’s investments and share price may decline. Changes in central bank policies and other governmental actions and political events within the U.S. and abroad may also, among other things, affect investor and consumer expectations and confidence in the financial markets, which could result in higher than normal redemptions by shareholders, which could potentially increase the Fund’s portfolio turnover rate and transaction costs.
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| Invesco AMT-Free Municipal Income Fund | Invesco AMT-Free Municipal Income Fund | Borrowing and Leverage Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Borrowing and Leverage Risk. The Fund can borrow up to one-third of the value of its total assets (including the amount borrowed) from banks, as permitted by the Investment Company Act of 1940. It can use those borrowings for a number of purposes, including for purchasing securities, which can create “leverage.” In that case, changes in the value of the Fund’s investments will have a larger effect on its share price than if it did not borrow. Borrowing results in interest payments to the lenders and related expenses. Borrowing for investment purposes might reduce the Fund’s return if the yield on the securities purchased is less than those borrowing costs.
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| Invesco AMT-Free Municipal Income Fund | Invesco AMT-Free Municipal Income Fund | Taxability Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Taxability Risk. The Fund’s investments in municipal securities rely on the opinion of the issuer’s bond counsel that the interest paid on those securities will not be subject to federal income tax. Tax opinions are generally provided at the time the municipal security is initially issued. However, tax opinions are not binding on the Internal Revenue Service or any court, and after the Fund buys a security, the Internal Revenue Service or a court may determine that a bond issued as tax-exempt should in fact be taxable and the Fund’s dividends with respect to that bond might be subject to federal income tax. In addition, income from tax-exempt municipal securities could be declared taxable because of unfavorable changes in tax laws, adverse interpretations by the Internal Revenue Service or a court, or the non-compliant conduct of a bond issuer.
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| Invesco AMT-Free Municipal Income Fund | Invesco AMT-Free Municipal Income Fund | Derivatives Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Derivatives Risk. The value of a derivative instrument depends largely on (and is derived from) the value of an underlying security, currency, commodity, interest rate, index or other asset (each referred to as an underlying asset). In addition to risks relating to the underlying assets, the use of derivatives may include other, possibly greater, risks, including counterparty, leverage and liquidity risks. Counterparty risk is the risk that the counterparty to the derivative contract will default on its obligation to pay the Fund the amount owed or otherwise perform under the derivative contract. Derivatives create leverage risk because they do not require payment up front equal to the economic exposure created by holding a position in the derivative. As a result, an adverse change in the value of the underlying asset could result in the Fund sustaining a loss that is substantially greater than the amount invested in the derivative or the anticipated value of the underlying asset, which may make the Fund’s returns more volatile and increase the risk of loss. Derivative instruments may also be less liquid than more traditional investments and the Fund may be unable to sell or close out its derivative positions at a desirable time or price. This risk may be more acute under adverse market conditions, during which the Fund may be most in need of liquidating its derivative positions. Derivatives may also be harder to value, less tax efficient and subject to changing government regulation that could impact the Fund’s ability to use certain derivatives or their cost. Derivatives strategies may not always be successful. For example, derivatives used for hedging or to gain or limit exposure to a particular market segment may not provide the expected benefits, particularly during adverse market conditions.
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| Invesco AMT-Free Municipal Income Fund | Invesco AMT-Free Municipal Income Fund | Defaulted Securities Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Defaulted Securities Risk. As compared with non-defaulted securities, defaulted securities pose a greater risk that principal will not be repaid. Defaulted securities and any securities received in an exchange for such securities may be subject to restrictions on resale.
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| Invesco AMT-Free Municipal Income Fund | Invesco AMT-Free Municipal Income Fund | Valuation Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] |
Valuation Risk. The price the Fund could receive upon the sale of a portfolio investment may differ from the Fund’s valuation of the investment, particularly for investments that trade in thin or volatile markets or that are valued using a fair valuation methodology. Fixed income securities are often valued assuming orderly transactions of institutional round lot size, but a Fund may hold or transact in the same securities in smaller, odd lot sizes. Odd lots often trade at lower prices than institutional round lots. When market quotations are not readily available for Fund investments, those investments are fair valued by the Adviser. There are multiple methods that can be used to fair value a portfolio investment and such methods may involve more subjectivity than the use of market quotations. The value established for an investment through fair valuation may be different from what would be produced if the investment had been valued using market quotations. In addition, there is no assurance that the Fund could sell a portfolio investment at any time for the value ascribed to it for purposes of calculating the Fund’s net asset value, and it is possible that the Fund could incur a loss because an investment is sold at a discount to its ascribed value. The ability to value investments may also be impacted by technological issues and/or errors by pricing services or other third-party service providers.
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| Invesco AMT-Free Municipal Income Fund | Invesco AMT-Free Municipal Income Fund | Management Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Management Risk. The Fund is actively managed and depends heavily on the Adviser's judgment about markets, interest rates or the attractiveness, relative values, liquidity, or potential appreciation of particular investments made for the Fund’s portfolio. The Fund could experience losses if these judgments prove to be incorrect. There can be no guarantee that the Adviser's investment techniques or investment decisions will produce the desired results. Additionally, legislative, regulatory, or tax developments may adversely affect management of the Fund and, therefore, the ability of the Fund to achieve its investment objective.
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| Invesco California Municipal Fund | Invesco California Municipal Fund | Risk Lose Money [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | The Fund could lose money on investments in debt securities if the issuer or borrower fails to meet its obligations to make interest payments and/or to repay principal in a timely manner. |
| Invesco California Municipal Fund | Invesco California Municipal Fund | Risk Not Insured [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | An investment in the Fund is not a deposit in a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other governmental agency. |
| Invesco California Municipal Fund | Invesco California Municipal Fund | Risk Money Market Fund Price Fluctuates [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | The values of high yield debt securities often fluctuate more in response to political, regulatory or economic developments than higher quality bonds, and their values can decline significantly over short periods of time or during periods of economic difficulty when the bonds could be difficult to value or sell at an acceptable price, thus subjecting the Fund to a substantial risk of loss. |
| Invesco California Municipal Fund | Invesco California Municipal Fund | Market Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Market Risk. The market values of the Fund’s investments, and therefore the value of the Fund’s shares, will go up and down, sometimes rapidly or unpredictably. Market risk may affect a single issuer, industry or section of the economy, or it may affect the market as a whole. The value of the Fund’s investments may go up or down due to general market conditions that are not specifically related to the particular issuer. These market conditions may include real or perceived adverse economic conditions, changes in trade regulation or economic sanctions, changes in the general outlook for revenues or corporate earnings, changes in interest or currency rates, regional or global instability and uncertainty, natural or environmental disasters, widespread disease or other public health issues, war, military conflict, acts of terrorism, economic crisis or adverse investor sentiment generally, among others. Certain changes in the U.S. economy in particular, such as when the U.S. economy weakens or when its financial markets decline, may have a material adverse effect on global financial markets as a whole, and on the securities to which the Fund has exposure. Increasingly strained relations between the U.S. and foreign countries, including as a result of economic sanctions and tariffs, may also adversely affect U.S. issuers, as well as non-U.S. issuers.
During a general downturn in the financial markets, multiple asset classes may decline in value. When markets perform well, there can be no assurance that specific investments held by the Fund will rise in value.
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| Invesco California Municipal Fund | Invesco California Municipal Fund | Debt Securities Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Debt Securities Risk. The prices of debt securities held by the Fund will be affected by changes in interest rates, the creditworthiness of the issuer and other factors. An increase in prevailing interest rates typically causes the value of existing debt securities to fall and often has a greater impact on longer-duration debt securities and higher quality debt securities. Falling interest rates will cause the Fund to reinvest the proceeds of debt securities that have been repaid by the issuer at lower interest rates. Falling interest rates may also reduce the Fund’s distributable income because interest payments on floating rate debt instruments held by the Fund will decline. The Fund could lose money on investments in debt securities if the issuer or borrower fails to meet its obligations to make interest payments and/or to repay principal in a timely manner. Changes in an issuer’s financial strength, the market’s perception of such strength or in the credit rating of the issuer or the security may affect the value of debt securities. The credit analysis applied to the Fund’s debt securities may fail to anticipate such changes, which could result in buying a debt security at an inopportune time or failing to sell a debt security in advance of a price decline or other credit event.
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| Invesco California Municipal Fund | Invesco California Municipal Fund | Municipal Securities Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] |
Municipal Securities Risk. The risk of a municipal obligation generally depends on the financial and credit status of the issuer. Constitutional amendments, legislative enactments, executive orders, administrative regulations, voter initiatives, and the issuer’s regional economic conditions may affect the municipal security’s value, interest payments, repayment of principal and the Fund’s ability to sell the security.
The amount of public information available about municipal securities is generally less than that for corporate equities or bonds; these limitations on
access to information needed to assess the creditworthiness of a municipal security could negatively impact its liquidity.
The secondary market for certain municipal securities tends to be less well developed or liquid than many other securities markets, which may adversely affect the fund's ability to buy or sell such municipal securities at acceptable prices. Investments that are illiquid or that trade in lower volumes may be more difficult to value.
Failure of a municipal security issuer to comply with applicable tax requirements may make income paid thereon taxable, resulting in a decline in the security’s value. In addition, there could be changes in applicable tax laws or tax treatments that reduce or eliminate the current federal income tax exemption on municipal securities or otherwise adversely affect the current federal or state tax status of municipal securities.
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| Invesco California Municipal Fund | Invesco California Municipal Fund | California Municipal Securities Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | California Municipal Securities Risk. The Fund is more susceptible to political, economic, regulatory or other factors affecting issuers of California municipal securities than a fund which does not focus its investments in such issuers. Accordingly, events in California may affect the Fund’s investments and performance.
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| Invesco California Municipal Fund | Invesco California Municipal Fund | Municipal Issuer Focus Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Municipal Issuer Focus Risk. The municipal issuers in which the Fund invests may be located in the same geographic area or may pay their interest obligations from revenue of similar projects, such as hospitals, airports, utility systems and housing finance agencies. This may make the Fund’s investments more susceptible to similar social, economic, political or regulatory occurrences, making the Fund more susceptible to experience a drop in its share price than if the Fund had been more diversified across issuers that did not have similar characteristics.
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| Invesco California Municipal Fund | Invesco California Municipal Fund | Investing in U.S. Territories, Commonwealths and Possessions Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Investing in U.S. Territories, Commonwealths and Possessions Risk. The Fund also invests in obligations of the governments of U.S. territories, commonwealths and possessions such as Puerto Rico, the U.S. Virgin Islands, Guam and the Northern Mariana Islands to the extent such obligations are exempt from regular federal individual and state income taxes. These investments also are considered to be “California municipal securities” for purposes of this prospectus. Accordingly, the Fund may be adversely affected by local political, economic, social and environmental conditions and developments, including natural disasters, within these U.S. territories, commonwealths and possessions affecting the issuers of such obligations.
Certain of the municipalities in which the Fund invests, including Puerto Rico, currently experience significant financial difficulties, which may include default, insolvency or bankruptcy. As a result, securities issued by certain of these municipalities are currently considered below-investment-grade securities. A credit rating downgrade relating to, default by, or insolvency or bankruptcy of, one or several municipal security issuers of a state, territory, commonwealth or possession in which the Fund invests could affect the payment of principal and interest, the market values and marketability of many or all municipal obligations of such state, territory, commonwealth or possession.
In the past several years, securities issued by Puerto Rico and its agencies and instrumentalities have been subject to multiple credit downgrades as a result of Puerto Rico’s ongoing fiscal challenges, growing debt obligations and uncertainty about its ability to make full repayment on these obligations, and certain issuers of Puerto Rican municipal securities have filed for bankruptcy and/or failed to make payments on obligations that have come due. Such developments could adversely impact the Fund’s performance and the Fund may pay expenses to preserve its claims related to its Puerto Rican holdings. The outcome of the debt restructuring of certain Puerto Rican issuers in which the Fund invests, both within and outside bankruptcy proceedings is uncertain, and could adversely affect the Fund.
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| Invesco California Municipal Fund | Invesco California Municipal Fund | Tobacco Related Bonds Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Tobacco Related Bonds Risk. The settlement payments made by tobacco manufacturers to certain U.S. states and jurisdictions pursuant to the Master Settlement Agreement (MSA) are based on factors, including, but not limited to, annual domestic cigarette shipments, cigarette consumption, inflation and the financial capability of participating tobacco companies. Payments could be reduced if tobacco consumption decreases, if market share is lost to non-MSA manufacturers, or if there is a negative outcome in litigation regarding the MSA, including challenges by participating tobacco manufacturers regarding the amount of annual payments owed under the MSA.
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| Invesco California Municipal Fund | Invesco California Municipal Fund | Land-Secured or “Dirt” Bonds Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Land-Secured or “Dirt” Bonds Risk. These bonds, which include special assessment, special tax, and tax increment financing bonds, are issued to promote residential, commercial and industrial growth and redevelopment. They are exposed to real estate development-related risks. The bonds could default if the developments failed to progress as anticipated or if taxpayers failed to pay the assessments, fees and taxes specified in the financing plans for a project.
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| Invesco California Municipal Fund | Invesco California Municipal Fund | Municipal Lease Obligations Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Municipal Lease Obligations Risk. Municipal lease obligations are used by state and local governments to obtain funds to acquire land, equipment or facilities. The Fund can invest in certificates of participation that represent a proportionate interest in payments made under municipal lease obligations. Most municipal lease obligations, while secured by the leased property, are not general obligations of the issuing municipality. They often contain “non-appropriation” clauses under which the municipal government has no obligation to make lease or installment payments in future years unless money is appropriated on a yearly basis.
If the municipal government stops making payments or transfers its payment obligations to a private entity, the obligation could lose value or become taxable. Although the obligation may be secured by the leased equipment or facilities, the disposition of the property in the event of non-appropriation or foreclosure might prove difficult, time consuming and costly, and may result in a delay in recovering or the failure to recover the original investment. Some lease obligations may not have an active trading market, making it difficult for the Fund to sell them quickly at an acceptable price.
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| Invesco California Municipal Fund | Invesco California Municipal Fund | Unrated Securities Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Unrated Securities Risk. The Adviser may internally assign ratings to securities that are not rated by any nationally recognized statistical rating organization, after assessing their credit quality and other factors, in categories similar to those of nationally recognized statistical rating organizations. There can be no assurance, nor is it intended, that the Adviser’s credit analysis process is consistent or comparable with the credit analysis process used by a nationally recognized statistical rating organization. Unrated securities are considered “investment-grade” or “below-investment-grade” if judged by the Adviser to be comparable to rated investment-grade or below-investment-grade securities. The Adviser's rating does not constitute a guarantee of the credit quality. In addition, some unrated securities may not have an active trading market or may trade less actively than rated securities, which means that unrated securities may be difficult to sell promptly at an acceptable rate and may be more difficult to value.
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| Invesco California Municipal Fund | Invesco California Municipal Fund | Medium- and Lower-Grade Municipal Securities Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Medium- and Lower-Grade Municipal Securities Risk. Medium- and lower-grade municipal securities generally involve more volatility and greater risks, including credit, market, liquidity and management risks, than higher-grade securities. Furthermore, many issuers of medium- and lower-grade securities choose not to have a rating assigned to their obligations. As such, the Fund’s portfolio may consist of a higher portion of unrated securities than an investment company investing solely in higher-grade securities. Unrated securities may not be as attractive to as many buyers as are rated securities, which may have the effect of limiting the Fund’s ability to sell such securities at an acceptable price and may make the securities more difficult to value. Investments that are illiquid or that trade in lower volumes may be more difficult to value.
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| Invesco California Municipal Fund | Invesco California Municipal Fund | High Yield Debt Securities (Junk Bond) Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | High Yield Debt Securities (Junk Bond) Risk. Compared to higher quality debt securities, high yield debt securities (also referred to as junk bonds or below-investment grade bonds) and other lower-rated securities involve a greater risk of default or price changes due to changes in the credit quality of the issuer. Compared to higher quality debt securities, high yield debt securities are more likely to be unsecured and are more likely to be subordinated to other creditors' claims. High yield debt securities are
considered speculative with respect to the issuer’s capacity to pay interest and repay principal, are more susceptible to default or decline in market value and are less liquid than investment grade debt securities. Prices of high yield debt securities tend to be very volatile. The values of high yield debt securities often fluctuate more in response to political, regulatory or economic developments than higher quality bonds, and their values can decline significantly over short periods of time or during periods of economic difficulty when the bonds could be difficult to value or sell at an acceptable price, thus subjecting the Fund to a substantial risk of loss. The secondary market for below investment grade securities may not be as liquid as the secondary market for more highly rated securities, a factor which may have an adverse effect on the fund's ability to dispose of a particular high yield security. There are fewer dealers in the market for high yield securities than for investment grade securities. The prices quoted by different dealers may vary significantly, and the spread between the bid and asked price is generally much larger for high yield securities than for higher quality securities.
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| Invesco California Municipal Fund | Invesco California Municipal Fund | Inverse Floating Rate Interests Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Inverse Floating Rate Interests Risk. Inverse floating rate interests (Inverse Floaters) are issued in connection with municipal tender option bond (TOB) financing transactions to generate leverage for the Fund. Such instruments are created by a special purpose trust (a TOB Trust) that holds long-term fixed rate bonds, sold to it by the Fund (the underlying security), and issues two classes of beneficial interests: short-term floating rate interests (Floaters), which are sold to other investors, and Inverse Floaters, which are purchased by the Fund. The Floaters have first priority on the cash flow from the underlying security held by the TOB Trust, have a tender option feature that allows holders to tender the Floaters back to the TOB Trust for their par amount and accrued interest at specified intervals and bear interest at prevailing short-term interest rates. Tendered Floaters are remarketed for sale to other investors for their par amount and accrued interest by a remarketing agent to the TOB Trust and are ultimately supported by a liquidity facility provided by a bank, upon which the TOB Trust can draw funds to pay such amount to holders of Tendered Floaters that cannot be remarketed. The Fund, as holder of the Inverse Floaters, is paid the residual cash flow from the underlying security. Accordingly, the Inverse Floaters provide the Fund with leveraged exposure to the underlying security. The price of Inverse Floaters is expected to decline when interest rates rise, and generally will decline more than the price of a bond with a similar maturity, because of the effect of leverage. The price of Inverse Floaters is typically more volatile than the price of bonds with similar maturities, especially if the relevant TOB Trust provides the holder of the Inverse Floaters relatively greater leveraged exposure to the underlying security (e.g., if the par amount of the Floaters, as a percentage of the par amount of the underlying security, is relatively greater). Further, as short-term interest rates rise, the interest payable on the Floaters issued by a TOB Trust also rises, leaving less residual interest cash flow from the underlying security available for payment on the Inverse Floaters. Additionally, Inverse Floaters may lose some or all of their principal and, in some cases, the Fund could lose money in excess of its investment in Inverse Floaters. Consequently, in a rising interest rate environment, the Fund’s investments in Inverse Floaters could negatively impact the Fund’s performance and yield, especially when those Inverse Floaters provide the Fund with relatively greater leveraged exposure to the relevant underlying securities.
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| Invesco California Municipal Fund | Invesco California Municipal Fund | Variable-Rate Demand Notes Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Variable-Rate Demand Notes Risk. There may not be an active secondary market with respect to particular variable and floating rate instruments in which the Fund invests, which could make it difficult to dispose of these instruments during periods that the Fund is not entitled to exercise its demand rights or if the issuer and/or remarketing agent defaulted on its payment obligation. This could cause the Fund to suffer a loss with respect to such instruments.
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| Invesco California Municipal Fund | Invesco California Municipal Fund | Changing Fixed Income Market Conditions Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Changing Fixed Income Market Conditions Risk. Increases in the federal funds and equivalent foreign rates or other changes to monetary policy or regulatory actions may expose fixed income markets to heightened volatility, perhaps suddenly and to a significant degree, and to reduced liquidity for certain fixed income investments, particularly those with longer maturities. Such changes and resulting increased volatility may adversely impact the Fund, including its operations, universe of potential investment options, and return potential. It is difficult to predict the impact of interest rate changes on various markets. In addition, decreases in fixed income dealer market-making capacity may also potentially lead to heightened volatility and reduced liquidity in the fixed income markets. As a result, the value of the Fund’s investments and share price may decline. Changes in central bank policies and other governmental actions and political events within the U.S. and abroad may also, among other things, affect investor and consumer expectations and confidence in the financial markets, which could result in higher than normal redemptions by shareholders, which could potentially increase the Fund’s portfolio turnover rate and transaction costs.
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| Invesco California Municipal Fund | Invesco California Municipal Fund | Borrowing and Leverage Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Borrowing and Leverage Risk. The Fund can borrow up to one-third of the value of its total assets (including the amount borrowed) from banks, as permitted by the Investment Company Act of 1940. It can use those borrowings for a number of purposes, including for purchasing securities, which can create “leverage.” In that case, changes in the value of the Fund’s investments will have a larger effect on its share price than if it did not borrow. Borrowing results in interest payments to the lenders and related expenses. Borrowing for investment purposes might reduce the Fund’s return if the yield on the securities purchased is less than those borrowing costs.
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| Invesco California Municipal Fund | Invesco California Municipal Fund | Alternative Minimum Tax Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Alternative Minimum Tax Risk. A portion of the Fund’s otherwise tax-exempt income may be taxable to those shareholders subject to the federal alternative minimum tax.
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| Invesco California Municipal Fund | Invesco California Municipal Fund | Taxability Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Taxability Risk. The Fund’s investments in municipal securities rely on the opinion of the issuer’s bond counsel that the interest paid on those securities will not be subject to federal or state income tax. Tax opinions are generally provided at the time the municipal security is initially issued. However, tax opinions are not binding on the Internal Revenue Service, state tax authorities or any court, and after the Fund buys a security, the Internal Revenue Service, state tax authorities or a court may determine that a bond issued as tax-exempt should in fact be taxable and the Fund’s dividends with respect to that bond might be subject to federal or state income tax. In addition, income from tax-exempt municipal securities could be declared taxable because of unfavorable changes in tax laws, adverse interpretations by the Internal Revenue Service, state tax authorities or a court, or the non-compliant conduct of a bond issuer.
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| Invesco California Municipal Fund | Invesco California Municipal Fund | Derivatives Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Derivatives Risk. The value of a derivative instrument depends largely on (and is derived from) the value of an underlying security, currency, commodity, interest rate, index or other asset (each referred to as an underlying asset). In addition to risks relating to the underlying assets, the use of derivatives may include other, possibly greater, risks, including counterparty, leverage and liquidity risks. Counterparty risk is the risk that the counterparty to the derivative contract will default on its obligation to pay the Fund the amount owed or otherwise perform under the derivative contract. Derivatives create leverage risk because they do not require payment up front equal to the economic exposure created by holding a position in the derivative. As a result, an adverse change in the value of the underlying asset could result in the Fund sustaining a loss that is substantially greater than the amount invested in the derivative or the anticipated value of the underlying asset, which may make the Fund’s returns more volatile and increase the risk of loss. Derivative instruments may also be less liquid than more traditional investments and the Fund may be unable to sell or close out its derivative positions at a desirable time or price. This risk may be more acute under adverse market conditions, during which the Fund may be most in need of liquidating its derivative positions. Derivatives may also be harder to value, less tax efficient and subject to changing government regulation that could impact the Fund’s ability to use certain derivatives or their cost. Derivatives strategies may not always be successful. For example, derivatives used for hedging or to gain or limit exposure to a particular market segment may not provide the expected benefits, particularly during adverse market conditions.
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| Invesco California Municipal Fund | Invesco California Municipal Fund | Valuation Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Valuation Risk. The price the Fund could receive upon the sale of a portfolio investment may differ from the Fund’s valuation of the investment, particularly for investments that trade in thin or volatile markets or that are valued using a fair valuation methodology. Fixed income securities are often valued assuming orderly transactions of institutional round lot size, but a Fund may hold or transact in the same securities in smaller, odd lot sizes. Odd lots often trade at lower prices than institutional round lots. When market quotations are not readily available for Fund investments, those investments are fair valued by the Adviser. There are multiple methods that can be used to fair value a portfolio investment and such methods may involve more subjectivity than the use of market quotations. The value established for an investment through fair valuation may be different from what would be produced if the investment had been valued using market quotations. In addition, there is no assurance that the Fund could sell a portfolio investment at any time for the value ascribed to it for purposes of calculating the Fund’s net asset value, and it is possible that the Fund could incur a loss because an investment is sold at a discount to its ascribed value. The ability to value investments may also be impacted by technological issues and/or errors by pricing services or other third-party service providers.
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| Invesco California Municipal Fund | Invesco California Municipal Fund | Management Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Management Risk. The Fund is actively managed and depends heavily on the Adviser's judgment about markets, interest rates or the attractiveness, relative values, liquidity, or potential appreciation of particular investments made for the Fund’s portfolio. The Fund could experience losses if these judgments prove to be incorrect. There can be no guarantee that the Adviser's investment techniques or investment decisions will produce the desired results. Additionally, legislative, regulatory, or tax developments may adversely affect management of the Fund and, therefore, the ability of the Fund to achieve its investment objective.
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| INVESCO HIGH YIELD MUNICIPAL FUND | INVESCO HIGH YIELD MUNICIPAL FUND | Risk Lose Money [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | The Fund could lose money on investments in debt securities if the issuer or borrower fails to meet its obligations to make interest payments and/or to repay principal in a timely manner. |
| INVESCO HIGH YIELD MUNICIPAL FUND | INVESCO HIGH YIELD MUNICIPAL FUND | Risk Not Insured [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | An investment in the Fund is not a deposit in a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other governmental agency. |
| INVESCO HIGH YIELD MUNICIPAL FUND | INVESCO HIGH YIELD MUNICIPAL FUND | Risk Money Market Fund Price Fluctuates [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | The values of high yield debt securities often fluctuate more in response to political, regulatory or economic developments than higher quality bonds, and their values can decline significantly over short periods of time or during periods of economic difficulty when the bonds could be difficult to value or sell at an acceptable price, thus subjecting the Fund to a substantial risk of loss. |
| INVESCO HIGH YIELD MUNICIPAL FUND | INVESCO HIGH YIELD MUNICIPAL FUND | Risk Money Market Fund May Not Preserve Dollar [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Although money market funds generally seek to preserve the value of an investment at $1.00 per share, the Fund may lose money by investing in money market funds. |
| INVESCO HIGH YIELD MUNICIPAL FUND | INVESCO HIGH YIELD MUNICIPAL FUND | Market Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Market Risk. The market values of the Fund’s investments, and therefore the value of the Fund’s shares, will go up and down, sometimes rapidly or unpredictably. Market risk may affect a single issuer, industry or section of the economy, or it may affect the market as a whole. The value of the Fund’s investments may go up or down due to general market conditions that are not specifically related to the particular issuer. These market conditions may include real or perceived adverse economic conditions, changes in trade regulation or economic sanctions, changes in the general outlook for revenues or corporate earnings, changes in interest or currency rates, regional or global instability and uncertainty, natural or environmental disasters, widespread disease or other public health issues, war, military conflict, acts of terrorism, economic crisis or adverse investor sentiment generally, among others. Certain changes in the U.S. economy in particular, such as when the U.S. economy weakens or when its financial markets decline, may have a material adverse effect on global financial markets as a whole, and on the securities to which the Fund has exposure. Increasingly strained relations between the U.S. and foreign countries, including as a result of economic sanctions and tariffs, may also adversely affect U.S. issuers, as well as non-U.S. issuers.
During a general downturn in the financial markets, multiple asset classes may decline in value. When markets perform well, there can be no assurance that specific investments held by the Fund will rise in value.
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| INVESCO HIGH YIELD MUNICIPAL FUND | INVESCO HIGH YIELD MUNICIPAL FUND | Debt Securities Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Debt Securities Risk. The prices of debt securities held by the Fund will be affected by changes in interest rates, the creditworthiness of the issuer and other factors. An increase in prevailing interest rates typically causes the value of existing debt securities to fall and often has a greater impact on longer-duration debt securities and higher quality debt securities. Falling interest rates will cause the Fund to reinvest the proceeds of debt securities that have been repaid by the issuer at lower interest rates. Falling interest rates may also reduce the Fund’s distributable income because interest payments on floating rate debt instruments held by the Fund will decline. The Fund could lose money on investments in debt securities if the issuer or borrower fails to meet its obligations to make interest payments and/or to repay principal in a timely manner. Changes in an issuer’s financial strength, the market’s perception of such strength or in the credit rating of the issuer or the security may affect the value of debt securities. The credit analysis applied to the Fund’s debt securities may fail to anticipate such changes, which could result in buying a debt security at an inopportune time or failing to sell a debt security in advance of a price decline or other credit event.
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| INVESCO HIGH YIELD MUNICIPAL FUND | INVESCO HIGH YIELD MUNICIPAL FUND | Municipal Securities Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] |
Municipal Securities Risk. The risk of a municipal obligation generally depends on the financial and credit status of the issuer. Constitutional amendments, legislative enactments, executive orders, administrative regulations, voter initiatives, and the issuer’s regional economic conditions may affect the municipal security’s value, interest payments, repayment of principal and the Fund’s ability to sell the security.
The amount of public information available about municipal securities is generally less than that for corporate equities or bonds; these limitations on access to information needed to assess the creditworthiness of a municipal security could negatively impact its liquidity.
The secondary market for certain municipal securities tends to be less well developed or liquid than many other securities markets, which may adversely affect the fund's ability to buy or sell such municipal securities at acceptable prices. Investments that are illiquid or that trade in lower volumes may be more difficult to value.
Failure of a municipal security issuer to comply with applicable tax requirements may make income paid thereon taxable, resulting in a decline in the security’s value. In addition, there could be changes in applicable tax laws or tax treatments that reduce or eliminate the current federal income tax exemption on municipal securities or otherwise adversely affect the current federal or state tax status of municipal securities.
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| INVESCO HIGH YIELD MUNICIPAL FUND | INVESCO HIGH YIELD MUNICIPAL FUND | Municipal Issuer Focus Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Municipal Issuer Focus Risk. The municipal issuers in which the Fund invests may be located in the same geographic area or may pay their interest obligations from revenue of similar projects, such as hospitals, airports, utility systems and housing finance agencies. This may make the Fund’s investments more susceptible to similar social, economic, political or regulatory occurrences, making the Fund more susceptible to experience a drop in its share price than if the Fund had been more diversified across issuers that did not have similar characteristics.
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| INVESCO HIGH YIELD MUNICIPAL FUND | INVESCO HIGH YIELD MUNICIPAL FUND | Investing in U.S. Territories, Commonwealths and Possessions Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Investing in U.S. Territories, Commonwealths and Possessions Risk. The Fund also invests in obligations of the governments of U.S. territories, commonwealths and possessions such as Puerto Rico, the U.S. Virgin Islands, Guam and the Northern Mariana Islands to the extent such obligations are exempt from regular federal individual and state income taxes. Accordingly, the Fund may be adversely affected by local political, economic, social and environmental conditions and developments, including natural disasters, within these U.S. territories, commonwealths and possessions affecting the issuers of such obligations.
Certain of the municipalities in which the Fund invests, including Puerto Rico, currently experience significant financial difficulties, which may include default, insolvency or bankruptcy. As a result, securities issued by certain of these municipalities are currently considered below-investment-grade securities. A credit rating downgrade relating to, default by, or insolvency or bankruptcy of, one or several municipal security issuers of a state, territory, commonwealth or possession in which the Fund invests could affect the payment of principal and interest, the market values and marketability of many or all municipal obligations of such state, territory, commonwealth or possession.
In the past several years, securities issued by Puerto Rico and its agencies and instrumentalities have been subject to multiple credit downgrades as a result of Puerto Rico’s ongoing fiscal challenges, growing debt obligations and uncertainty about its ability to make full repayment on these obligations, and certain issuers of Puerto Rican municipal securities have filed for bankruptcy and/or failed to make payments on obligations that have come due. Such developments could adversely impact the Fund’s performance and the Fund may pay expenses to preserve its claims related to its Puerto Rican holdings. The outcome of the debt restructuring of certain Puerto Rican issuers in which the Fund invests, both within and outside bankruptcy proceedings is uncertain, and could adversely affect the Fund.
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| INVESCO HIGH YIELD MUNICIPAL FUND | INVESCO HIGH YIELD MUNICIPAL FUND | Tobacco Related Bonds Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Tobacco Related Bonds Risk. The settlement payments made by tobacco manufacturers to certain U.S. states and jurisdictions pursuant to the Master Settlement Agreement (MSA) are based on factors, including, but not limited to, annual domestic cigarette shipments, cigarette consumption, inflation and the financial capability of participating tobacco companies. Payments could be reduced if tobacco consumption decreases, if market share is lost to non-MSA manufacturers, or if there is a negative outcome in litigation regarding the MSA, including challenges by participating tobacco manufacturers regarding the amount of annual payments owed under the MSA.
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| INVESCO HIGH YIELD MUNICIPAL FUND | INVESCO HIGH YIELD MUNICIPAL FUND | Municipal Lease Obligations Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Municipal Lease Obligations Risk. Municipal lease obligations are used by state and local governments to obtain funds to acquire land, equipment or facilities. The Fund can invest in certificates of participation that represent a proportionate interest in payments made under municipal lease obligations. Most municipal lease obligations, while secured by the leased property, are not general obligations of the issuing municipality. They often contain “non-appropriation” clauses under which the municipal government has no obligation to make lease or installment payments in future years unless money is appropriated on a yearly basis.
If the municipal government stops making payments or transfers its payment obligations to a private entity, the obligation could lose value or become taxable. Although the obligation may be secured by the leased equipment or facilities, the disposition of the property in the event of non-appropriation or foreclosure might prove difficult, time consuming and costly, and may result in a delay in recovering or the failure to recover the original investment. Some lease obligations may not have an active trading market, making it difficult for the Fund to sell them quickly at an acceptable price.
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| INVESCO HIGH YIELD MUNICIPAL FUND | INVESCO HIGH YIELD MUNICIPAL FUND | Money Market Fund Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Money Market Fund Risk. Although money market funds generally seek to preserve the value of an investment at $1.00 per share, the Fund may lose money by investing in money market funds. A money market fund's sponsor is not required to reimburse the money market fund for losses. The credit quality of a money market fund's holdings can change rapidly in certain markets, and the default of a single holding could have an adverse impact on the money market fund's share price. A money market fund's share price can also be negatively affected during periods of high redemption pressures, illiquid markets and/or significant market volatility.
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| INVESCO HIGH YIELD MUNICIPAL FUND | INVESCO HIGH YIELD MUNICIPAL FUND | Unrated Securities Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Unrated Securities Risk. The Adviser may internally assign ratings to securities that are not rated by any nationally recognized statistical rating organization, after assessing their credit quality and other factors, in categories similar to those of nationally recognized statistical rating organizations. There can be no assurance, nor is it intended, that the Adviser’s credit analysis process is consistent or comparable with the credit analysis process used by a nationally recognized statistical rating organization. Unrated securities are considered “investment-grade” or “below-investment-grade” if judged by the Adviser to be comparable to rated investment-grade or below-investment-grade securities. The Adviser's rating does not constitute a guarantee of the credit quality. In addition, some unrated securities may not have an active trading market or may trade less actively than rated securities, which means that unrated securities may be difficult to sell promptly at an acceptable rate and may be more difficult to value.
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| INVESCO HIGH YIELD MUNICIPAL FUND | INVESCO HIGH YIELD MUNICIPAL FUND | Medium- and Lower-Grade Municipal Securities Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Medium- and Lower-Grade Municipal Securities Risk. Medium- and lower-grade municipal securities generally involve more volatility and greater risks, including credit, market, liquidity and management risks, than higher-grade securities. Furthermore, many issuers of medium- and lower-grade securities choose not to have a rating assigned to their obligations. As such, the Fund’s portfolio may consist of a higher portion of unrated securities than an investment company investing solely in higher-grade securities. Unrated securities may not be as attractive to as many buyers as are rated securities, which may have the effect of limiting the Fund’s ability to sell such securities at an acceptable price and may make the securities more difficult to value. Investments that are illiquid or that trade in lower volumes may be more difficult to value.
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| INVESCO HIGH YIELD MUNICIPAL FUND | INVESCO HIGH YIELD MUNICIPAL FUND | High Yield Debt Securities (Junk Bond) Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | High Yield Debt Securities (Junk Bond) Risk. Compared to higher quality debt securities, high yield debt securities (also referred to as junk bonds or below-investment grade bonds) and other lower-rated securities involve a greater risk of default or price changes due to changes in the credit quality of the issuer. Compared to higher quality debt securities, high yield debt securities are more likely to be unsecured and are more likely to be subordinated to other creditors' claims. High yield debt securities are considered speculative with respect to the issuer’s capacity to pay interest and repay principal, are more susceptible to default or decline in market value and are less liquid than investment grade debt securities. Prices of high yield debt securities tend to be very volatile. The values of high yield debt securities often fluctuate more in response to political, regulatory or economic developments than higher quality bonds, and their values can decline significantly over short periods of time or during periods of economic difficulty when the bonds could be difficult to value or sell at an acceptable price, thus subjecting the Fund to a substantial risk of loss. The secondary market for below investment grade securities may not be as liquid as the secondary market for more highly rated securities, a factor which may have an adverse effect on the fund's ability to dispose of a particular high yield security. There are fewer dealers in the market for high yield securities than for investment grade securities. The prices quoted by different dealers may vary significantly, and the spread between the bid and asked price is generally much larger for high yield securities than for higher quality securities.
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| INVESCO HIGH YIELD MUNICIPAL FUND | INVESCO HIGH YIELD MUNICIPAL FUND | Inverse Floating Rate Interests Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Inverse Floating Rate Interests Risk. Inverse floating rate interests (Inverse Floaters) are issued in connection with municipal tender option bond (TOB) financing transactions to generate leverage for the Fund. Such instruments are created by a special purpose trust (a TOB Trust) that holds long-term fixed rate bonds, sold to it by the Fund (the underlying security), and issues two classes of beneficial interests: short-term floating rate interests (Floaters), which are sold to other investors, and Inverse Floaters, which are purchased by the Fund. The Floaters have first priority on the cash flow from the underlying security held by the TOB Trust, have a tender option feature that allows holders to tender the Floaters back to the TOB Trust for their par amount and accrued interest at specified intervals and bear interest at prevailing short-term interest rates. Tendered Floaters are remarketed for sale to other investors for their par amount and accrued interest by a remarketing agent to the TOB Trust and are ultimately supported by a liquidity facility provided by a bank, upon which the TOB Trust can draw funds to pay such amount to holders of Tendered Floaters that cannot be remarketed. The Fund, as holder of the Inverse Floaters, is paid the residual cash flow from the underlying security. Accordingly, the Inverse Floaters provide the Fund with leveraged exposure to the underlying security. The price of Inverse Floaters is expected to decline when interest rates rise, and generally will decline more than the price of a bond with a similar maturity, because of the effect of leverage. The price of Inverse Floaters is typically more volatile than the price of bonds with similar maturities, especially if the relevant TOB Trust provides the holder of the Inverse Floaters relatively greater leveraged exposure to the underlying security (e.g., if the par amount of the Floaters, as a percentage of the par amount of the underlying security, is relatively greater). Further, as short-term interest rates rise, the interest payable on the Floaters issued by a TOB Trust also rises, leaving less residual interest cash flow from the underlying security available for payment on the Inverse Floaters. Additionally, Inverse Floaters may lose some or all of their principal and, in some cases, the Fund could lose money in excess of its investment in Inverse Floaters. Consequently, in a rising interest rate environment, the Fund’s investments in Inverse Floaters could negatively impact the Fund’s performance and yield, especially when those Inverse Floaters provide the Fund with relatively greater leveraged exposure to the relevant underlying securities.
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| INVESCO HIGH YIELD MUNICIPAL FUND | INVESCO HIGH YIELD MUNICIPAL FUND | Variable-Rate Demand Notes Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Variable-Rate Demand Notes Risk. There may not be an active secondary market with respect to particular variable and floating rate instruments in which the Fund invests, which could make it difficult to dispose of these instruments during periods that the Fund is not entitled to exercise its demand rights or if the issuer and/or remarketing agent defaulted on its payment obligation. This could cause the Fund to suffer a loss with respect to such instruments.
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| INVESCO HIGH YIELD MUNICIPAL FUND | INVESCO HIGH YIELD MUNICIPAL FUND | When-Issued, Delayed Delivery and Forward Commitment Risks [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | When-Issued, Delayed Delivery and Forward Commitment Risks. When-issued and delayed delivery transactions subject the Fund to market risk because the value or yield of a security at delivery may be more or less than the purchase price or yield generally available when delivery occurs, and counterparty risk because the Fund relies on the buyer or seller, as the case may be, to consummate the transaction. These transactions also have a leveraging effect on the Fund because the Fund commits to purchase securities that it does not have to pay for until a later date, which increases the Fund’s overall investment exposure and, as a result, its volatility.
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| INVESCO HIGH YIELD MUNICIPAL FUND | INVESCO HIGH YIELD MUNICIPAL FUND | Changing Fixed Income Market Conditions Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Changing Fixed Income Market Conditions Risk. Increases in the federal funds and equivalent foreign rates or other changes to monetary policy or regulatory actions may expose fixed income markets to heightened volatility, perhaps suddenly and to a significant degree, and to reduced liquidity for certain fixed income investments, particularly those with longer maturities. Such changes and resulting increased volatility may adversely impact the Fund, including its operations, universe of potential investment options, and return potential. It is difficult to predict the impact of interest rate changes on various markets. In addition, decreases in fixed income dealer market-making capacity may also potentially lead to heightened volatility and reduced liquidity in the fixed income markets. As a result, the value of the Fund’s investments and share price may decline. Changes in central bank policies and other governmental actions and political events within the U.S. and abroad may also, among other things, affect investor and consumer expectations and confidence in the financial markets, which could result in higher than normal redemptions by shareholders, which could potentially increase the Fund’s portfolio turnover rate and transaction costs.
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| INVESCO HIGH YIELD MUNICIPAL FUND | INVESCO HIGH YIELD MUNICIPAL FUND | Rule 144A Securities and Other Exempt Securities Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Rule 144A Securities and Other Exempt Securities Risk. The market for Rule 144A and other securities exempt from certain registration requirements may be less active than the market for publicly-traded securities. Rule 144A and other exempt securities, while initially privately placed, carry the risk that their liquidity may become impaired and the Fund may be unable to dispose of the securities at a desirable time or price.
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| INVESCO HIGH YIELD MUNICIPAL FUND | INVESCO HIGH YIELD MUNICIPAL FUND | Restricted Securities Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Restricted Securities Risk. Limitations on the resale of restricted securities may have an adverse effect on their marketability, and may prevent the Fund from disposing of them promptly at reasonable prices. There can be no assurance that a trading market will exist at any time for any particular restricted security. Transaction costs may be higher for restricted securities and such securities may be difficult to value and may have significant volatility.
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| INVESCO HIGH YIELD MUNICIPAL FUND | INVESCO HIGH YIELD MUNICIPAL FUND | Zero Coupon or Pay-In-Kind Securities Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Zero Coupon or Pay-In-Kind Securities Risk. The value, interest rates, and liquidity of non-cash paying instruments, such as zero coupon and pay-in-kind securities, are subject to greater fluctuation than other types of securities. The higher yields and interest rates on pay-in-kind securities reflect the payment deferral and increased credit risk associated with such instruments and that such investments may represent a higher credit risk than loans that periodically pay interest.
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| INVESCO HIGH YIELD MUNICIPAL FUND | INVESCO HIGH YIELD MUNICIPAL FUND | Borrowing and Leverage Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Borrowing and Leverage Risk. The Fund can borrow up to one-third of the value of its total assets (including the amount borrowed) from banks, as permitted by the Investment Company Act of 1940. It can use those borrowings for a number of purposes, including for purchasing securities, which can create “leverage.” In that case, changes in the value of the Fund’s investments will have a larger effect on its share price than if it did not borrow. Borrowing results in interest payments to the lenders and related expenses. Borrowing for investment purposes might reduce the Fund’s return if the yield on the securities purchased is less than those borrowing costs.
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| INVESCO HIGH YIELD MUNICIPAL FUND | INVESCO HIGH YIELD MUNICIPAL FUND | Alternative Minimum Tax Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Alternative Minimum Tax Risk. All or a portion of the Fund’s otherwise tax-exempt income may be taxable to those shareholders subject to the federal alternative minimum tax.
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| INVESCO HIGH YIELD MUNICIPAL FUND | INVESCO HIGH YIELD MUNICIPAL FUND | Distressed Debt Securities Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Distressed Debt Securities Risk. Distressed debt securities, including those issued by companies that are involved in reorganizations, financial restructurings or bankruptcy, are speculative and involve substantial risks in addition to the risks of investing in below-investment-grade debt securities.
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| INVESCO HIGH YIELD MUNICIPAL FUND | INVESCO HIGH YIELD MUNICIPAL FUND | Taxability Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Taxability Risk. The Fund’s investments in municipal securities rely on the opinion of the issuer’s bond counsel that the interest paid on those securities will not be subject to federal or state income tax. Tax opinions are generally provided at the time the municipal security is initially issued. However, tax opinions are not binding on the Internal Revenue Service or any court, and after the Fund buys a security, the Internal Revenue Service or a court may determine that a bond issued as tax-exempt should in fact be taxable and the Fund’s dividends with respect to that bond might be subject to federal or state income tax. In addition, income from tax-exempt municipal securities could be declared taxable because of unfavorable changes in tax laws, adverse interpretations by the Internal Revenue Service or a court, or the non-compliant conduct of a bond issuer.
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| INVESCO HIGH YIELD MUNICIPAL FUND | INVESCO HIGH YIELD MUNICIPAL FUND | Derivatives Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Derivatives Risk. The value of a derivative instrument depends largely on (and is derived from) the value of an underlying security, currency, commodity, interest rate, index or other asset (each referred to as an underlying asset). In addition to risks relating to the underlying assets, the use of derivatives may include other, possibly greater, risks, including counterparty, leverage and liquidity risks. Counterparty risk is the risk that the counterparty to the derivative contract will default on its obligation to pay the Fund the amount owed or otherwise perform under the derivative contract. Derivatives create leverage risk because they do not require payment up front equal to the economic exposure created by holding a position in the derivative. As a result, an adverse change in the value of the underlying asset could result in the Fund sustaining a loss that is substantially greater than the amount invested in the derivative or the anticipated value of the underlying asset, which may make the Fund’s returns more volatile and increase the risk of loss. Derivative instruments may also be less liquid than more traditional investments and the Fund may be unable to sell or close out its derivative positions at a desirable time or price. This risk may be more acute under adverse market conditions, during which the Fund may be most in need of liquidating its derivative positions. Derivatives may also be harder to value, less tax efficient and subject to changing government regulation that could impact the Fund’s ability to use certain derivatives or their cost. Derivatives strategies may not always be successful. For example, derivatives used for hedging or to gain or limit exposure to a particular market segment may not provide the expected benefits, particularly during adverse market conditions.
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| INVESCO HIGH YIELD MUNICIPAL FUND | INVESCO HIGH YIELD MUNICIPAL FUND | Liquidity Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] |
Liquidity Risk. The Fund may be unable to sell illiquid investments at the time or price it desires and, as a result, could lose its entire investment in such investments. Liquid securities can become illiquid during periods of market stress. If a significant amount of the Fund’s securities become illiquid, the Fund may not be able to timely pay redemption proceeds and may need to sell securities at significantly reduced prices.
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| INVESCO HIGH YIELD MUNICIPAL FUND | INVESCO HIGH YIELD MUNICIPAL FUND | Defaulted Securities Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Defaulted Securities Risk. As compared with non-defaulted securities, defaulted securities pose a greater risk that principal will not be repaid. Defaulted securities and any securities received in an exchange for such securities may be subject to restrictions on resale.
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| INVESCO HIGH YIELD MUNICIPAL FUND | INVESCO HIGH YIELD MUNICIPAL FUND | Valuation Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Valuation Risk. The price the Fund could receive upon the sale of a portfolio investment may differ from the Fund’s valuation of the investment, particularly for investments that trade in thin or volatile markets or that are valued using a fair valuation methodology. Fixed income securities are often valued assuming orderly transactions of institutional round lot size, but a Fund may hold or transact in the same securities in smaller, odd lot sizes. Odd lots often trade at lower prices than institutional round lots. When market quotations are not readily available for Fund investments, those investments are fair valued by the Adviser. There are multiple methods that can be used to fair value a portfolio investment and such methods may involve more subjectivity than the use of market quotations. The value established for an investment through fair valuation may be different from what would be produced if the investment had been valued using market quotations. In addition, there is no assurance that the Fund could sell a portfolio investment at any time for the value ascribed to it for purposes of calculating the Fund’s net asset value, and it is possible that the Fund could incur a loss because an investment is sold at a discount to its ascribed value. The ability to value investments may also be impacted by technological issues and/or errors by pricing services or other third-party service providers.
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| INVESCO HIGH YIELD MUNICIPAL FUND | INVESCO HIGH YIELD MUNICIPAL FUND | Management Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Management Risk. The Fund is actively managed and depends heavily on the Adviser's judgment about markets, interest rates or the attractiveness, relative values, liquidity, or potential appreciation of particular investments made for the Fund’s portfolio. The Fund could experience losses if these judgments prove to be incorrect. There can be no guarantee that the Adviser's investment techniques or investment decisions will produce the desired results. Additionally, legislative, regulatory, or tax developments may adversely affect management of the Fund and, therefore, the ability of the Fund to achieve its investment objective.
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| INVESCO INTERMEDIATE TERM MUNICIPAL INCOME FUND | INVESCO INTERMEDIATE TERM MUNICIPAL INCOME FUND | Risk Lose Money [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | The Fund could lose money on investments in debt securities if the issuer or borrower fails to meet its obligations to make interest payments and/or to repay principal in a timely manner. |
| INVESCO INTERMEDIATE TERM MUNICIPAL INCOME FUND | INVESCO INTERMEDIATE TERM MUNICIPAL INCOME FUND | Risk Not Insured [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | An investment in the Fund is not a deposit in a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other governmental agency. |
| INVESCO INTERMEDIATE TERM MUNICIPAL INCOME FUND | INVESCO INTERMEDIATE TERM MUNICIPAL INCOME FUND | Risk Money Market Fund Price Fluctuates [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | The values of high yield debt securities often fluctuate more in response to political, regulatory or economic developments than higher quality bonds, and their values can decline significantly over short periods of time or during periods of economic difficulty when the bonds could be difficult to value or sell at an acceptable price, thus subjecting the Fund to a substantial risk of loss. |
| INVESCO INTERMEDIATE TERM MUNICIPAL INCOME FUND | INVESCO INTERMEDIATE TERM MUNICIPAL INCOME FUND | Risk Money Market Fund May Not Preserve Dollar [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Although money market funds generally seek to preserve the value of an investment at $1.00 per share, the Fund may lose money by investing in money market funds. |
| INVESCO INTERMEDIATE TERM MUNICIPAL INCOME FUND | INVESCO INTERMEDIATE TERM MUNICIPAL INCOME FUND | Market Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Market Risk. The market values of the Fund’s investments, and therefore the value of the Fund’s shares, will go up and down, sometimes rapidly or unpredictably. Market risk may affect a single issuer, industry or section of the economy, or it may affect the market as a whole. The value of the Fund’s investments may go up or down due to general market conditions that are not specifically related to the particular issuer. These market conditions may include real or perceived adverse economic conditions, changes in trade regulation or economic sanctions, changes in the general outlook for revenues or corporate earnings, changes in interest or currency rates, regional or global instability and uncertainty, natural or environmental disasters, widespread disease or other public health issues, war, military conflict, acts of terrorism, economic crisis or adverse investor sentiment generally, among others. Certain changes in the U.S. economy in particular, such as when the U.S. economy weakens or when its financial markets decline, may have a material adverse effect on global financial markets as a whole, and on the securities to which the Fund has exposure. Increasingly strained relations between the U.S. and foreign countries, including as a result of economic sanctions and tariffs, may also adversely affect U.S. issuers, as well as non-U.S. issuers.
During a general downturn in the financial markets, multiple asset classes may decline in value. When markets perform well, there can be no assurance that specific investments held by the Fund will rise in value.
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| INVESCO INTERMEDIATE TERM MUNICIPAL INCOME FUND | INVESCO INTERMEDIATE TERM MUNICIPAL INCOME FUND | Debt Securities Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Debt Securities Risk. The prices of debt securities held by the Fund will be affected by changes in interest rates, the creditworthiness of the issuer and other factors. An increase in prevailing interest rates typically causes the value of existing debt securities to fall and often has a greater impact on longer-duration debt securities and higher quality debt securities. Falling interest rates will cause the Fund to reinvest the proceeds of debt securities that have been repaid by the issuer at lower interest rates. Falling interest rates may also reduce the Fund’s distributable income because interest payments on floating rate debt instruments held by the Fund will decline. The Fund could lose money on investments in debt securities if the issuer or borrower fails to meet its obligations to make interest payments and/or to repay principal in a timely manner. Changes in an issuer’s financial strength, the market’s perception of such strength or in the credit rating of the issuer or the security may affect the value of debt securities. The credit analysis applied to the Fund’s debt securities may fail to anticipate such changes, which could result in buying a debt security at an inopportune time or failing to sell a debt security in advance of a price decline or other credit event.
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| INVESCO INTERMEDIATE TERM MUNICIPAL INCOME FUND | INVESCO INTERMEDIATE TERM MUNICIPAL INCOME FUND | Municipal Securities Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] |
Municipal Securities Risk. The risk of a municipal obligation generally depends on the financial and credit status of the issuer. Constitutional amendments, legislative enactments, executive orders, administrative regulations, voter initiatives, and the issuer’s regional economic conditions may affect the municipal security’s value, interest payments, repayment of principal and the Fund’s ability to sell the security.
The amount of public information available about municipal securities is generally less than that for corporate equities or bonds; these limitations on access to information needed to assess the creditworthiness of a municipal security could negatively impact its liquidity.
The secondary market for certain municipal securities tends to be less well developed or liquid than many other securities markets, which may adversely affect the fund's ability to buy or sell such municipal securities at acceptable prices. Investments that are illiquid or that trade in lower volumes may be more difficult to value.
Failure of a municipal security issuer to comply with applicable tax requirements may make income paid thereon taxable, resulting in a decline in the security’s value. In addition, there could be changes in applicable tax laws or tax treatments that reduce or eliminate the current federal income tax exemption on municipal securities or otherwise adversely affect the current federal or state tax status of municipal securities.
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| INVESCO INTERMEDIATE TERM MUNICIPAL INCOME FUND | INVESCO INTERMEDIATE TERM MUNICIPAL INCOME FUND | Municipal Issuer Focus Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Municipal Issuer Focus Risk. The municipal issuers in which the Fund invests may be located in the same geographic area or may pay their interest obligations from revenue of similar projects, such as hospitals, airports, utility systems and housing finance agencies. This may make the Fund’s investments more susceptible to similar social, economic, political or regulatory occurrences, making the Fund more susceptible to experience a drop in its share price than if the Fund had been more diversified across issuers that did not have similar characteristics.
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| INVESCO INTERMEDIATE TERM MUNICIPAL INCOME FUND | INVESCO INTERMEDIATE TERM MUNICIPAL INCOME FUND | Investing in U.S. Territories, Commonwealths and Possessions Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Investing in U.S. Territories, Commonwealths and Possessions Risk. The Fund also invests in obligations of the governments of U.S. territories, commonwealths and possessions such as Puerto Rico, the U.S. Virgin Islands, Guam and the Northern Mariana Islands to the extent such obligations are exempt from regular federal individual and state income taxes. Accordingly, the Fund may be adversely affected by local political, economic, social and environmental conditions and developments, including natural disasters, within these U.S. territories, commonwealths and possessions affecting the issuers of such obligations.
Certain of the municipalities in which the Fund invests, including Puerto Rico, currently experience significant financial difficulties, which may include default, insolvency or bankruptcy. As a result, securities issued by certain of these municipalities are currently considered below-investment-grade securities. A credit rating downgrade relating to, default by, or insolvency or bankruptcy of, one or several municipal security issuers of a state, territory, commonwealth or possession in which the Fund invests could affect the payment of principal and interest, the market values and marketability of many or all municipal obligations of such state, territory, commonwealth or possession.
In the past several years, securities issued by Puerto Rico and its agencies and instrumentalities have been subject to multiple credit downgrades as a result of Puerto Rico’s ongoing fiscal challenges, growing debt obligations and uncertainty about its ability to make full repayment on these obligations, and certain issuers of Puerto Rican municipal securities have filed for bankruptcy and/or failed to make payments on obligations that have come due. Such developments could adversely impact the Fund’s performance and the Fund may pay expenses to preserve its claims related to its Puerto Rican holdings. The outcome of the debt restructuring of certain Puerto Rican issuers in which the Fund invests, both within and outside bankruptcy proceedings is uncertain, and could adversely affect the Fund.
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| INVESCO INTERMEDIATE TERM MUNICIPAL INCOME FUND | INVESCO INTERMEDIATE TERM MUNICIPAL INCOME FUND | Tobacco Related Bonds Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Tobacco Related Bonds Risk. The settlement payments made by tobacco manufacturers to certain U.S. states and jurisdictions pursuant to the Master Settlement Agreement (MSA) are based on factors, including, but not limited to, annual domestic cigarette shipments, cigarette consumption, inflation and the financial capability of participating tobacco companies. Payments could be reduced if tobacco consumption decreases, if market share is lost to non-MSA manufacturers, or if there is a negative outcome in litigation regarding the MSA, including challenges by participating tobacco manufacturers regarding the amount of annual payments owed under the MSA.
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| INVESCO INTERMEDIATE TERM MUNICIPAL INCOME FUND | INVESCO INTERMEDIATE TERM MUNICIPAL INCOME FUND | Municipal Lease Obligations Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Municipal Lease Obligations Risk. Municipal lease obligations are used by state and local governments to obtain funds to acquire land, equipment or facilities. The Fund can invest in certificates of participation that represent a proportionate interest in payments made under municipal lease obligations. Most municipal lease obligations, while secured by the leased property, are not general obligations of the issuing municipality. They often contain “non-appropriation” clauses under which the municipal government has no obligation to make lease or installment payments in future years unless money is appropriated on a yearly basis.
If the municipal government stops making payments or transfers its payment obligations to a private entity, the obligation could lose value or become taxable. Although the obligation may be secured by the leased equipment or facilities, the disposition of the property in the event of non-appropriation or foreclosure might prove difficult, time consuming and costly, and may result in a delay in recovering or the failure to recover the original investment. Some lease obligations may not have an active trading market, making it difficult for the Fund to sell them quickly at an acceptable price.
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| INVESCO INTERMEDIATE TERM MUNICIPAL INCOME FUND | INVESCO INTERMEDIATE TERM MUNICIPAL INCOME FUND | Money Market Fund Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Money Market Fund Risk. Although money market funds generally seek to preserve the value of an investment at $1.00 per share, the Fund may lose money by investing in money market funds. A money market fund's sponsor is not required to reimburse the money market fund for losses. The credit quality of a money market fund's holdings can change rapidly in certain markets, and the default of a single holding could have an adverse impact on the money market fund's share price. A money market fund's share price can also be negatively affected during periods of high redemption pressures, illiquid markets and/or significant market volatility.
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| INVESCO INTERMEDIATE TERM MUNICIPAL INCOME FUND | INVESCO INTERMEDIATE TERM MUNICIPAL INCOME FUND | Unrated Securities Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Unrated Securities Risk. The Adviser may internally assign ratings to securities that are not rated by any nationally recognized statistical rating organization, after assessing their credit quality and other factors, in categories similar to those of nationally recognized statistical rating organizations. There can be no assurance, nor is it intended, that the Adviser’s credit analysis process is consistent or comparable with the credit analysis process used by a nationally recognized statistical rating organization. Unrated securities are considered “investment-grade” or “below-investment-grade” if judged by the Adviser to be comparable to rated investment-grade or below-investment-grade securities. The Adviser's rating does not constitute a guarantee of the credit quality. In addition, some unrated securities may not have an active trading market or may trade less actively than rated securities, which means that unrated securities may be difficult to sell promptly at an acceptable rate and may be more difficult to value.
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| INVESCO INTERMEDIATE TERM MUNICIPAL INCOME FUND | INVESCO INTERMEDIATE TERM MUNICIPAL INCOME FUND | Medium- and Lower-Grade Municipal Securities Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Medium- and Lower-Grade Municipal Securities Risk. Medium- and lower-grade municipal securities generally involve more volatility and greater risks, including credit, market, liquidity and management risks, than higher-grade securities. Furthermore, many issuers of medium- and lower-grade securities choose not to have a rating assigned to their obligations. As such, the Fund’s portfolio may consist of a higher portion of unrated securities than an investment company investing solely in higher-grade securities. Unrated securities may not be as attractive to as many buyers as are rated securities, which may have the effect of limiting the Fund’s ability to sell such securities at an acceptable price and may make the securities more difficult to value. Investments that are illiquid or that trade in lower volumes may be more difficult to value.
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| INVESCO INTERMEDIATE TERM MUNICIPAL INCOME FUND | INVESCO INTERMEDIATE TERM MUNICIPAL INCOME FUND | High Yield Debt Securities (Junk Bond) Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | High Yield Debt Securities (Junk Bond) Risk. Compared to higher quality debt securities, high yield debt securities (also referred to as junk bonds or below-investment grade bonds) and other lower-rated securities involve a greater risk of default or price changes due to changes in the credit quality of the issuer. Compared to higher quality debt securities, high yield debt securities are more likely to be unsecured and are more likely to be subordinated to other creditors' claims. High yield debt securities are considered speculative with respect to the issuer’s capacity to pay interest and repay principal, are more susceptible to default or decline in market value and are less liquid than investment grade debt securities. Prices of high yield debt securities tend to be very volatile. The values of high yield debt securities often fluctuate more in response to political, regulatory or economic developments than higher quality bonds, and their values can decline significantly over short periods of time or during periods of economic difficulty when the bonds could be difficult to value or sell at an acceptable price, thus subjecting the Fund to a substantial risk of loss. The secondary market for below investment grade securities may not be as liquid as the secondary market for more highly rated securities, a factor which may have an adverse effect on the fund's ability to dispose of a particular high yield security. There are fewer dealers in the market for high yield securities than for investment grade securities. The prices quoted by different dealers may vary significantly, and the spread between the bid and asked price is generally much larger for high yield securities than for higher quality securities.
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| INVESCO INTERMEDIATE TERM MUNICIPAL INCOME FUND | INVESCO INTERMEDIATE TERM MUNICIPAL INCOME FUND | Inverse Floating Rate Interests Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Inverse Floating Rate Interests Risk. Inverse floating rate interests (Inverse Floaters) are issued in connection with municipal tender option bond (TOB) financing transactions to generate leverage for the Fund. Such instruments are created by a special purpose trust (a TOB Trust) that holds long-term fixed rate bonds, sold to it by the Fund (the underlying security), and issues two classes of beneficial interests: short-term floating rate interests (Floaters), which are sold to other investors, and Inverse Floaters, which are purchased by the Fund. The Floaters have first priority on the cash flow from the underlying security held by the TOB Trust, have a tender option feature that allows holders to tender the Floaters back to the TOB Trust for their par amount and accrued interest at specified intervals and bear interest at prevailing short-term interest rates. Tendered Floaters are remarketed for sale to other investors for their par amount and accrued interest by a remarketing agent to the TOB Trust and are ultimately supported by a liquidity facility provided by a bank, upon which the TOB Trust can draw funds to pay such amount to holders of Tendered Floaters that cannot be remarketed. The Fund, as holder of the Inverse Floaters, is paid the residual cash flow from the underlying security. Accordingly, the Inverse Floaters provide the Fund with leveraged exposure to the underlying security. The price of Inverse Floaters is expected to decline when interest rates rise, and generally will decline more than the price of a bond with a similar maturity, because of the effect of leverage. The price of Inverse Floaters is typically more volatile than the price of bonds with similar maturities, especially if the relevant TOB Trust provides the holder of the Inverse Floaters relatively greater leveraged exposure to the underlying security (e.g., if the par amount of the Floaters, as a percentage of the par amount of the underlying security, is relatively greater). Further, as short-term interest rates rise, the interest payable on the Floaters issued by a TOB Trust also rises, leaving less residual interest cash flow from the underlying security available for payment on the Inverse Floaters. Additionally, Inverse Floaters may lose some or all of their principal and, in some cases, the Fund could lose money in excess of its investment in Inverse Floaters. Consequently, in a rising interest rate environment, the Fund’s investments in Inverse Floaters could negatively impact the Fund’s performance and yield, especially when those Inverse Floaters provide the Fund with relatively greater leveraged exposure to the relevant underlying securities.
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| INVESCO INTERMEDIATE TERM MUNICIPAL INCOME FUND | INVESCO INTERMEDIATE TERM MUNICIPAL INCOME FUND | Variable-Rate Demand Notes Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Variable-Rate Demand Notes Risk. There may not be an active secondary market with respect to particular variable and floating rate instruments in which the Fund invests, which could make it difficult to dispose of these instruments during periods that the Fund is not entitled to exercise its demand rights or if the issuer and/or remarketing agent defaulted on its payment obligation. This could cause the Fund to suffer a loss with respect to such instruments.
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| INVESCO INTERMEDIATE TERM MUNICIPAL INCOME FUND | INVESCO INTERMEDIATE TERM MUNICIPAL INCOME FUND | When-Issued, Delayed Delivery and Forward Commitment Risks [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | When-Issued, Delayed Delivery and Forward Commitment Risks. When-issued and delayed delivery transactions subject the Fund to market risk because the value or yield of a security at delivery may be more or less than the purchase price or yield generally available when delivery occurs, and counterparty risk because the Fund relies on the buyer or seller, as the case may be, to consummate the transaction. These transactions also have a leveraging effect on the Fund because the Fund commits to purchase securities that it does not have to pay for until a later date, which increases the Fund’s overall investment exposure and, as a result, its volatility.
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| INVESCO INTERMEDIATE TERM MUNICIPAL INCOME FUND | INVESCO INTERMEDIATE TERM MUNICIPAL INCOME FUND | Changing Fixed Income Market Conditions Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Changing Fixed Income Market Conditions Risk. Increases in the federal funds and equivalent foreign rates or other changes to monetary policy or regulatory actions may expose fixed income markets to heightened volatility, perhaps suddenly and to a significant degree, and to reduced liquidity for certain fixed income investments, particularly those with longer maturities. Such changes and resulting increased volatility may adversely impact the Fund, including its operations, universe of potential investment options, and return potential. It is difficult to predict the impact of interest rate changes on various markets. In addition, decreases in fixed income dealer market-making capacity may also potentially lead to heightened volatility and reduced liquidity in the fixed income markets. As a result, the value of the Fund’s investments and share price may decline. Changes in central bank policies and other governmental actions and political events within the U.S. and abroad may also, among other things, affect investor and consumer expectations and confidence in the financial markets, which could result in higher than normal redemptions by shareholders, which could potentially increase the Fund’s portfolio turnover rate and transaction costs.
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| INVESCO INTERMEDIATE TERM MUNICIPAL INCOME FUND | INVESCO INTERMEDIATE TERM MUNICIPAL INCOME FUND | Rule 144A Securities and Other Exempt Securities Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Rule 144A Securities and Other Exempt Securities Risk. The market for Rule 144A and other securities exempt from certain registration requirements may be less active than the market for publicly-traded securities. Rule 144A and other exempt securities, while initially privately placed, carry the risk that their liquidity may become impaired and the Fund may be unable to dispose of the securities at a desirable time or price.
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| INVESCO INTERMEDIATE TERM MUNICIPAL INCOME FUND | INVESCO INTERMEDIATE TERM MUNICIPAL INCOME FUND | Zero Coupon or Pay-In-Kind Securities Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Zero Coupon or Pay-In-Kind Securities Risk. The value, interest rates, and liquidity of non-cash paying instruments, such as zero coupon and pay-in-kind securities, are subject to greater fluctuation than other types of securities. The higher yields and interest rates on pay-in-kind securities reflect the payment deferral and increased credit risk associated with such instruments and that such investments may represent a higher credit risk than loans that periodically pay interest.
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| INVESCO INTERMEDIATE TERM MUNICIPAL INCOME FUND | INVESCO INTERMEDIATE TERM MUNICIPAL INCOME FUND | Borrowing and Leverage Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Borrowing and Leverage Risk. The Fund can borrow up to one-third of the value of its total assets (including the amount borrowed) from banks, as permitted by the Investment Company Act of 1940. It can use those borrowings for a number of purposes, including for purchasing securities, which can create “leverage.” In that case, changes in the value of the Fund’s investments will have a larger effect on its share price than if it did not borrow. Borrowing results in interest payments to the lenders and related expenses. Borrowing for investment purposes might reduce the Fund’s return if the yield on the securities purchased is less than those borrowing costs.
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| INVESCO INTERMEDIATE TERM MUNICIPAL INCOME FUND | INVESCO INTERMEDIATE TERM MUNICIPAL INCOME FUND | Alternative Minimum Tax Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Alternative Minimum Tax Risk. All or a portion of the Fund’s otherwise tax-exempt income may be taxable to those shareholders subject to the federal alternative minimum tax.
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| INVESCO INTERMEDIATE TERM MUNICIPAL INCOME FUND | INVESCO INTERMEDIATE TERM MUNICIPAL INCOME FUND | Taxability Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Taxability Risk. The Fund’s investments in municipal securities rely on the opinion of the issuer’s bond counsel that the interest paid on those securities will not be subject to federal or state income tax. Tax opinions are generally provided at the time the municipal security is initially issued. However, tax opinions are not binding on the Internal Revenue Service or any court, and after the Fund buys a security, the Internal Revenue Service or a court may determine that a bond issued as tax-exempt should in fact be taxable and the Fund’s dividends with respect to that bond might be subject to federal or state income tax. In addition, income from tax-exempt municipal securities could be declared taxable because of unfavorable changes in tax laws, adverse interpretations by the Internal Revenue Service or a court, or the non-compliant conduct of a bond issuer.
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| INVESCO INTERMEDIATE TERM MUNICIPAL INCOME FUND | INVESCO INTERMEDIATE TERM MUNICIPAL INCOME FUND | Derivatives Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Derivatives Risk. The value of a derivative instrument depends largely on (and is derived from) the value of an underlying security, currency, commodity, interest rate, index or other asset (each referred to as an underlying asset). In addition to risks relating to the underlying assets, the use of derivatives may include other, possibly greater, risks, including counterparty, leverage and liquidity risks. Counterparty risk is the risk that the counterparty to the derivative contract will default on its obligation to pay the Fund the amount owed or otherwise perform under the derivative contract. Derivatives create leverage risk because they do not require payment up front equal to the economic exposure created by holding a position in the derivative. As a result, an adverse change in the value of the underlying asset could result in the Fund sustaining a loss that is substantially greater than the amount invested in the derivative or the anticipated value of the underlying asset, which may make the Fund’s returns more volatile and increase the risk of loss. Derivative instruments may also be less liquid than more traditional investments and the Fund may be unable to sell or close out its derivative positions at a desirable time or price. This risk may be more acute under adverse market conditions, during which the Fund may be most in need of liquidating its derivative positions. Derivatives may also be harder to value, less tax efficient and subject to changing government regulation that could impact the Fund’s ability to use certain derivatives or their cost. Derivatives strategies may not always be successful. For example, derivatives used for hedging or to gain or limit exposure to a particular market segment may not provide the expected benefits, particularly during adverse market conditions.
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| INVESCO INTERMEDIATE TERM MUNICIPAL INCOME FUND | INVESCO INTERMEDIATE TERM MUNICIPAL INCOME FUND | Liquidity Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] |
Liquidity Risk. The Fund may be unable to sell illiquid investments at the time or price it desires and, as a result, could lose its entire investment in such investments. Liquid securities can become illiquid during periods of market stress. If a significant amount of the Fund’s securities become illiquid, the Fund may not be able to timely pay redemption proceeds and may need to sell securities at significantly reduced prices.
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| INVESCO INTERMEDIATE TERM MUNICIPAL INCOME FUND | INVESCO INTERMEDIATE TERM MUNICIPAL INCOME FUND | Valuation Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] |
Valuation Risk. The price the Fund could receive upon the sale of a portfolio investment may differ from the Fund’s valuation of the investment, particularly for investments that trade in thin or volatile markets or that are valued using a fair valuation methodology. Fixed income securities are often valued assuming orderly transactions of institutional round lot size, but a Fund may hold or transact in the same securities in smaller, odd lot sizes. Odd lots often trade at lower prices than institutional round lots. When market quotations are not readily available for Fund investments, those investments are fair valued by the Adviser. There are multiple methods that can be used to fair value a portfolio investment and such methods may involve more subjectivity than the use of market quotations. The value established for an investment through fair valuation may be different from what would be produced if the investment had been valued using market quotations. In addition, there is no assurance that the Fund could sell a portfolio investment at any time for the value ascribed to it for purposes of calculating the Fund’s net asset value, and it is possible that the Fund could incur a loss because an investment is sold at a discount to its ascribed value. The ability to value investments may also be impacted by technological issues and/or errors by pricing services or other third-party service providers.
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| INVESCO INTERMEDIATE TERM MUNICIPAL INCOME FUND | INVESCO INTERMEDIATE TERM MUNICIPAL INCOME FUND | Management Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Management Risk. The Fund is actively managed and depends heavily on the Adviser's judgment about markets, interest rates or the attractiveness, relative values, liquidity, or potential appreciation of particular investments made for the Fund’s portfolio. The Fund could experience losses if these judgments prove to be incorrect. There can be no guarantee that the Adviser's investment techniques or investment decisions will produce the desired results. Additionally, legislative, regulatory, or tax developments may adversely affect management of the Fund and, therefore, the ability of the Fund to achieve its investment objective.
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| Invesco Limited Term California Municipal Fund | Invesco Limited Term California Municipal Fund | Risk Lose Money [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | The Fund could lose money on investments in debt securities if the issuer or borrower fails to meet its obligations to make interest payments and/or to repay principal in a timely manner. |
| Invesco Limited Term California Municipal Fund | Invesco Limited Term California Municipal Fund | Risk Not Insured [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | An investment in the Fund is not a deposit in a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other governmental agency. |
| Invesco Limited Term California Municipal Fund | Invesco Limited Term California Municipal Fund | Risk Money Market Fund Price Fluctuates [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | The values of high yield debt securities often fluctuate more in response to political, regulatory or economic developments than higher quality bonds, and their values can decline significantly over short periods of time or during periods of economic difficulty when the bonds could be difficult to value or sell at an acceptable price, thus subjecting the Fund to a substantial risk of loss. |
| Invesco Limited Term California Municipal Fund | Invesco Limited Term California Municipal Fund | Market Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Market Risk. The market values of the Fund’s investments, and therefore the value of the Fund’s shares, will go up and down, sometimes rapidly or unpredictably. Market risk may affect a single issuer, industry or section of the economy, or it may affect the market as a whole. The value of the Fund’s investments may go up or down due to general market conditions that are not specifically related to the particular issuer. These market conditions may include real or perceived adverse economic conditions, changes in trade regulation or economic sanctions, changes in the general outlook for revenues or corporate earnings, changes in interest or currency rates, regional or global instability and uncertainty, natural or environmental disasters, widespread disease or other public health issues, war, military conflict, acts of terrorism, economic crisis or adverse investor sentiment generally, among others. Certain changes in the U.S. economy in particular, such as when the U.S. economy weakens or when its financial markets decline, may have a material adverse effect on global financial markets as a whole, and on the securities to which the Fund has exposure. Increasingly strained relations between the U.S. and foreign countries, including as a result of economic sanctions and tariffs, may also adversely affect U.S. issuers, as well as non-U.S. issuers.
During a general downturn in the financial markets, multiple asset classes may decline in value. When markets perform well, there can be no assurance that specific investments held by the Fund will rise in value.
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| Invesco Limited Term California Municipal Fund | Invesco Limited Term California Municipal Fund | Debt Securities Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Debt Securities Risk. The prices of debt securities held by the Fund will be affected by changes in interest rates, the creditworthiness of the issuer and other factors. An increase in prevailing interest rates typically causes the value of existing debt securities to fall and often has a greater impact on longer-duration debt securities and higher quality debt securities. Falling interest rates will cause the Fund to reinvest the proceeds of debt securities that have been repaid by the issuer at lower interest rates. Falling interest rates may also reduce the Fund’s distributable income because interest payments on floating rate debt instruments held by the Fund will decline. The Fund could lose money on investments in debt securities if the issuer or borrower fails to meet its obligations to make interest payments and/or to repay principal in a timely manner. Changes in an issuer’s financial strength, the market’s perception of such strength or in the credit rating of the issuer or the security may affect the value of debt securities. The credit analysis applied to the Fund’s debt securities may fail to anticipate such changes, which could result in buying a debt security at an inopportune time or failing to sell a debt security in advance of a price decline or other credit event.
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| Invesco Limited Term California Municipal Fund | Invesco Limited Term California Municipal Fund | Municipal Securities Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Municipal Securities Risk. The risk of a municipal obligation generally depends on the financial and credit status of the issuer.
Constitutional amendments, legislative enactments, executive orders, administrative regulations, voter initiatives, and the issuer’s regional economic conditions may affect the municipal security’s value, interest payments, repayment of principal and the Fund’s ability to sell the security.
The amount of public information available about municipal securities is generally less than that for corporate equities or bonds; these limitations on access to information needed to assess the creditworthiness of a municipal security could negatively impact its liquidity.
The secondary market for certain municipal securities tends to be less well developed or liquid than many other securities markets, which may adversely affect the fund's ability to buy or sell such municipal securities at acceptable prices. Investments that are illiquid or that trade in lower volumes may be more difficult to value.
Failure of a municipal security issuer to comply with applicable tax requirements may make income paid thereon taxable, resulting in a decline in the security’s value. In addition, there could be changes in applicable tax laws or tax treatments that reduce or eliminate the current federal income tax exemption on municipal securities or otherwise adversely affect the current federal or state tax status of municipal securities.
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| Invesco Limited Term California Municipal Fund | Invesco Limited Term California Municipal Fund | California Municipal Securities Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | California Municipal Securities Risk. The Fund is more susceptible to political, economic, regulatory or other factors affecting issuers of California municipal securities than a fund which does not focus its investments in such issuers. Accordingly, events in California may affect the Fund’s investments and performance.
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| Invesco Limited Term California Municipal Fund | Invesco Limited Term California Municipal Fund | Municipal Issuer Focus Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Municipal Issuer Focus Risk. The municipal issuers in which the Fund invests may be located in the same geographic area or may pay their interest obligations from revenue of similar projects, such as hospitals, airports, utility systems and housing finance agencies. This may make the Fund’s investments more susceptible to similar social, economic, political or regulatory occurrences, making the Fund more susceptible to experience a drop in its share price than if the Fund had been more diversified across issuers that did not have similar characteristics.
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| Invesco Limited Term California Municipal Fund | Invesco Limited Term California Municipal Fund | Investing in U.S. Territories, Commonwealths and Possessions Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Investing in U.S. Territories, Commonwealths and Possessions Risk. The Fund also invests in obligations of the governments of U.S. territories, commonwealths and possessions such as Puerto Rico, the U.S. Virgin Islands, Guam and the Northern Mariana Islands to the extent such obligations are exempt from regular federal individual and state income taxes. These investments also are considered to be “California municipal securities” for purposes of this prospectus. Accordingly, the Fund may be adversely affected by local political, economic, social and environmental conditions and developments, including natural disasters, within these U.S. territories, commonwealths and possessions affecting the issuers of such obligations.
Certain of the municipalities in which the Fund invests, including Puerto Rico, currently experience significant financial difficulties, which may include default, insolvency or bankruptcy. As a result, securities issued by certain of these municipalities are currently considered below-investment-grade securities. A credit rating downgrade relating to, default by, or insolvency or bankruptcy of, one or several municipal security issuers of a state, territory, commonwealth or possession in which the Fund invests could affect the payment of principal and interest, the market values and marketability of many or all municipal obligations of such state, territory, commonwealth or possession.
In the past several years, securities issued by Puerto Rico and its agencies and instrumentalities have been subject to multiple credit downgrades as a result of Puerto Rico’s ongoing fiscal challenges, growing debt obligations and uncertainty about its ability to make full repayment on these obligations, and certain issuers of Puerto Rican municipal securities have filed for bankruptcy and/or failed to make payments on obligations that have come due. Such developments could adversely impact the Fund’s performance and the Fund may pay expenses to preserve its claims related to its Puerto Rican holdings. The outcome of the debt restructuring of certain Puerto Rican issuers in which the Fund invests, both within and outside bankruptcy proceedings is uncertain, and could adversely affect the Fund.
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| Invesco Limited Term California Municipal Fund | Invesco Limited Term California Municipal Fund | Shorter-Term Securities Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Shorter-Term Securities Risk. Normally, when interest rates change, the values of shorter-term debt securities change less than the values of securities with longer maturities. The Fund tries to reduce the volatility of its share prices by seeking to maintain a shorter average effective portfolio maturity. However, shorter-term securities may have lower yields than longer-term securities. Shorter-term securities are also subject to extension and reinvestment risk. The Fund is subject to extension risk when principal payments on a debt security occur at a slower rate than expected, potentially extending the average life of the security. For securities with a call date in the near future, there is the risk that an increase in interest rates could result in the issuer of that security choosing not to redeem the security as anticipated on the security’s call date. Such a decision by the issuer may effectively change a short- or intermediate-term security into a longer term security, which could have the effect of locking in a below-market interest rate on the security, increasing the security’s duration, making the security more vulnerable to interest rate risk, reducing the security’s market value and increasing the Fund’s average effective portfolio maturity. Under such circumstances, because the values of longer term securities generally fluctuate more widely in response to interest rate changes than shorter term securities, the Fund’s volatility could increase. Reinvestment risk is the risk that if interest rates fall the Fund may need to invest the proceeds of redeemed securities in securities with lower interest rates.
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| Invesco Limited Term California Municipal Fund | Invesco Limited Term California Municipal Fund | Tobacco Related Bonds Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Tobacco Related Bonds Risk. The settlement payments made by tobacco manufacturers to certain U.S. states and jurisdictions pursuant to the Master Settlement Agreement (MSA) are based on factors, including, but not limited to, annual domestic cigarette shipments, cigarette consumption, inflation and the financial capability of participating tobacco companies. Payments could be reduced if tobacco consumption decreases, if market share is lost to non-MSA manufacturers, or if there is a negative outcome in litigation regarding the MSA, including challenges by participating tobacco manufacturers regarding the amount of annual payments owed under the MSA.
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| Invesco Limited Term California Municipal Fund | Invesco Limited Term California Municipal Fund | Land-Secured or “Dirt” Bonds Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Land-Secured or “Dirt” Bonds Risk. These bonds, which include special assessment, special tax, and tax increment financing bonds, are issued to promote residential, commercial and industrial growth and redevelopment. They are exposed to real estate development-related risks. The bonds could default if the developments failed to progress as anticipated or if taxpayers failed to pay the assessments, fees and taxes specified in the financing plans for a project.
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| Invesco Limited Term California Municipal Fund | Invesco Limited Term California Municipal Fund | Municipal Lease Obligations Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Municipal Lease Obligations Risk. Municipal lease obligations are used by state and local governments to obtain funds to acquire land, equipment or facilities. The Fund can invest in certificates of participation that represent a proportionate interest in payments made under municipal lease obligations. Most municipal lease obligations, while secured by the leased property, are not general obligations of the issuing municipality. They often contain “non-appropriation” clauses under which the municipal government has no obligation to make lease or installment payments in future years unless money is appropriated on a yearly basis.
If the municipal government stops making payments or transfers its payment obligations to a private entity, the obligation could lose value or become taxable. Although the obligation may be secured by the leased equipment or facilities, the disposition of the property in the event of non-appropriation or foreclosure might prove difficult, time consuming and costly, and may result in a delay in recovering or the failure to recover the original investment. Some lease obligations may not have an active trading market, making it difficult for the Fund to sell them quickly at an acceptable price.
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| Invesco Limited Term California Municipal Fund | Invesco Limited Term California Municipal Fund | Unrated Securities Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Unrated Securities Risk. The Adviser may internally assign ratings to securities that are not rated by any nationally recognized statistical rating organization, after assessing their credit quality and other factors, in categories similar to those of nationally recognized statistical rating organizations. There can be no assurance, nor is it intended, that the Adviser’s credit analysis process is consistent or comparable with the credit analysis process used by a nationally recognized statistical rating organization. Unrated securities are considered “investment-grade” or “below-investment-grade” if judged by the Adviser to be comparable to rated investment-grade or below-investment-grade securities. The Adviser's rating does not constitute a guarantee of the credit quality. In addition, some unrated securities may not have an active trading market or may trade less actively than rated securities, which means that unrated securities may be difficult to sell promptly at an acceptable rate and may be more difficult to value.
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| Invesco Limited Term California Municipal Fund | Invesco Limited Term California Municipal Fund | Medium- and Lower-Grade Municipal Securities Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Medium- and Lower-Grade Municipal Securities Risk. Medium- and lower-grade municipal securities generally involve more volatility and greater risks, including credit, market, liquidity and management risks, than higher-grade securities. Furthermore, many issuers of medium- and lower-grade securities choose not to have a rating assigned to their obligations. As such, the Fund’s portfolio may consist of a higher portion of unrated securities than an investment company investing solely in higher-grade securities. Unrated securities may not be as attractive to as many buyers as are rated securities, which may have the effect of limiting the Fund’s ability to sell such securities at an acceptable price and may make the securities more difficult to value. Investments that are illiquid or that trade in lower volumes may be more difficult to value.
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| Invesco Limited Term California Municipal Fund | Invesco Limited Term California Municipal Fund | High Yield Debt Securities (Junk Bond) Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | High Yield Debt Securities (Junk Bond) Risk. Compared to higher quality debt securities, high yield debt securities (also referred to as junk bonds or below-investment grade bonds) and other lower-rated securities involve a greater risk of default or price changes due to changes in the credit quality of the issuer. Compared to higher quality debt securities, high yield debt securities are more likely to be unsecured and are more likely to be subordinated to other creditors' claims. High yield debt securities are considered speculative with respect to the issuer’s capacity to pay interest and repay principal, are more susceptible to default or decline in market value and are less liquid than investment grade debt securities. Prices of high yield debt securities tend to be very volatile. The values of high yield debt securities often fluctuate more in response to political, regulatory or economic developments than higher quality bonds, and their values can decline significantly over short periods of time or during periods of economic difficulty when the bonds could be difficult to value or sell at an acceptable price, thus subjecting the Fund to a substantial risk of loss. The secondary market for below investment grade securities may not be as liquid as the secondary market for more highly rated securities, a factor which may have an adverse effect on the fund's ability to dispose of a particular high yield security. There are fewer dealers in the market for high yield securities than for investment grade securities. The prices quoted by different dealers may vary significantly, and the spread between the bid and asked price is generally much larger for high yield securities than for higher quality securities.
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| Invesco Limited Term California Municipal Fund | Invesco Limited Term California Municipal Fund | Inverse Floating Rate Interests Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Inverse Floating Rate Interests Risk. Inverse floating rate interests (Inverse Floaters) are issued in connection with municipal tender option bond (TOB) financing transactions to generate leverage for the Fund. Such instruments are created by a special purpose trust (a TOB Trust) that holds long-term fixed rate bonds, sold to it by the Fund (the underlying security), and issues two classes of beneficial interests: short-term floating rate interests (Floaters), which are sold to other investors, and Inverse Floaters, which are purchased by the Fund. The Floaters have first priority on the cash flow from the underlying security held by the TOB Trust, have a tender option feature that allows holders to tender the Floaters back to the TOB Trust for their par amount and accrued interest at specified intervals and bear interest at prevailing short-term interest rates. Tendered Floaters are remarketed for sale to other investors for their par amount and accrued interest by a remarketing agent to the TOB Trust and are ultimately supported by a liquidity facility provided by a bank, upon which the TOB Trust can draw funds to pay such amount to holders of Tendered Floaters that cannot be remarketed. The Fund, as holder of the Inverse Floaters, is paid the residual cash flow from the underlying security. Accordingly, the Inverse Floaters provide the Fund with leveraged exposure to the underlying security. The price of Inverse Floaters is expected to decline when interest rates rise, and generally will decline more than the price of a bond with a similar maturity, because of the effect of leverage. The price of Inverse Floaters is typically more volatile than the price of bonds with similar maturities, especially if the relevant TOB Trust provides the holder of the Inverse Floaters relatively greater leveraged exposure to the underlying security (e.g., if the par amount of the Floaters, as a percentage of the par amount of the underlying security, is relatively greater). Further, as short-term interest rates rise, the interest payable on the Floaters issued by a TOB Trust also rises, leaving less residual interest cash flow from the underlying security available for payment on the Inverse Floaters. Additionally, Inverse Floaters may lose some or all of their principal and, in some cases, the Fund could lose money in excess of its investment in Inverse Floaters. Consequently, in a rising interest rate environment, the Fund’s investments in Inverse Floaters could negatively impact the Fund’s performance and yield, especially when those Inverse Floaters provide the Fund with relatively greater leveraged exposure to the relevant underlying securities.
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| Invesco Limited Term California Municipal Fund | Invesco Limited Term California Municipal Fund | Changing Fixed Income Market Conditions Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Changing Fixed Income Market Conditions Risk. Increases in the federal funds and equivalent foreign rates or other changes to monetary policy or regulatory actions may expose fixed income markets to heightened volatility, perhaps suddenly and to a significant degree, and to reduced liquidity for certain fixed income investments, particularly those with longer maturities. Such changes and resulting increased volatility may adversely impact the Fund, including its operations, universe of potential investment options, and return potential. It is difficult to predict the impact of interest rate changes on various markets. In addition, decreases in fixed income dealer market-making capacity may also potentially lead to heightened volatility and reduced liquidity in the fixed income markets. As a result, the value of the Fund’s investments and share price may decline. Changes in central bank policies and other governmental actions and political events within the U.S. and abroad may also, among other things, affect investor and consumer expectations and confidence in the financial markets, which could result in higher than normal redemptions by shareholders, which could potentially increase the Fund’s portfolio turnover rate and transaction costs.
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| Invesco Limited Term California Municipal Fund | Invesco Limited Term California Municipal Fund | Borrowing and Leverage Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Borrowing and Leverage Risk. The Fund can borrow up to one-third of the value of its total assets (including the amount borrowed) from banks, as permitted by the Investment Company Act of 1940. It can use those borrowings for a number of purposes, including for purchasing securities, which can create “leverage.” In that case, changes in the value of the Fund’s investments will have a larger effect on its share price than if it did not borrow. Borrowing results in interest payments to the lenders and related expenses. Borrowing for investment purposes might reduce the Fund’s return if the yield on the securities purchased is less than those borrowing costs.
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| Invesco Limited Term California Municipal Fund | Invesco Limited Term California Municipal Fund | Alternative Minimum Tax Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Alternative Minimum Tax Risk. A portion of the Fund’s otherwise tax-exempt income may be taxable to those shareholders subject to the federal alternative minimum tax.
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| Invesco Limited Term California Municipal Fund | Invesco Limited Term California Municipal Fund | Taxability Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Taxability Risk. The Fund’s investments in municipal securities rely on the opinion of the issuer’s bond counsel that the interest paid on those securities will not be subject to federal or state income tax. Tax opinions are generally provided at the time the municipal security is initially issued. However, tax opinions are not binding on the Internal Revenue Service, state tax authorities or any court, and after the Fund buys a security, the Internal Revenue Service, state tax authorities or a court may determine that a bond issued as tax-exempt should in fact be taxable and the Fund’s dividends with respect to that bond might be subject to federal or state income tax. In addition, income from tax-exempt municipal securities could be declared taxable because of unfavorable changes in tax laws, adverse interpretations by the Internal Revenue Service, state tax authorities or a court, or the non-compliant conduct of a bond issuer.
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| Invesco Limited Term California Municipal Fund | Invesco Limited Term California Municipal Fund | Derivatives Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Derivatives Risk. The value of a derivative instrument depends largely on (and is derived from) the value of an underlying security, currency, commodity, interest rate, index or other asset (each referred to as an underlying asset). In addition to risks relating to the underlying assets, the use of derivatives may include other, possibly greater, risks, including counterparty, leverage and liquidity risks. Counterparty risk is the risk that the counterparty to the derivative contract will default on its obligation to pay the Fund the amount owed or otherwise perform under the derivative contract. Derivatives create leverage risk because they do not require payment up front equal to the economic exposure created by holding a position in the derivative. As a result, an adverse change in the value of the underlying asset could result in the Fund sustaining a loss that is substantially greater than the amount invested in the derivative or the anticipated value of the underlying asset, which may make the Fund’s returns more volatile and increase the risk of loss. Derivative instruments may also be less liquid than more traditional investments and the Fund may be unable to sell or close out its derivative positions at a desirable time or price. This risk may be more acute under adverse market conditions, during which the Fund may be most in need of liquidating its derivative positions. Derivatives may also be harder to value, less tax efficient and subject to changing government regulation that could impact the Fund’s ability to use certain derivatives or their cost. Derivatives strategies may not always be successful. For example, derivatives used for hedging or to gain or limit exposure to a particular market segment may not provide the expected benefits, particularly during adverse market conditions.
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| Invesco Limited Term California Municipal Fund | Invesco Limited Term California Municipal Fund | Valuation Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Valuation Risk. The price the Fund could receive upon the sale of a portfolio investment may differ from the Fund’s valuation of the investment, particularly for investments that trade in thin or volatile markets or that are valued using a fair valuation methodology. Fixed income securities are often valued assuming orderly transactions of institutional round lot size, but a Fund may hold or transact in the same securities in smaller, odd lot sizes. Odd lots often trade at lower prices than institutional round lots. When market quotations are not readily available for Fund investments, those investments are fair valued by the Adviser. There are multiple methods that can be used to fair value a portfolio investment and such methods may involve more subjectivity than the use of market quotations. The value established for an investment through fair valuation may be different from what would be produced if the investment had been valued using market quotations. In addition, there is no assurance that the Fund could sell a portfolio investment at any time for the value ascribed to it for purposes of calculating the Fund’s net asset value, and it is possible that the Fund could incur a loss because an investment is sold at a discount to its ascribed value. The ability to value investments may also be impacted by technological issues and/or errors by pricing services or other third-party service providers.
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| Invesco Limited Term California Municipal Fund | Invesco Limited Term California Municipal Fund | Management Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Management Risk. The Fund is actively managed and depends heavily on the Adviser's judgment about markets, interest rates or the attractiveness, relative values, liquidity, or potential appreciation of particular investments made for the Fund’s portfolio. The Fund could experience losses if these judgments prove to be incorrect. There can be no guarantee that the Adviser's investment techniques or investment decisions will produce the desired results. Additionally, legislative, regulatory, or tax developments may adversely affect management of the Fund and, therefore, the ability of the Fund to achieve its investment objective.
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| Invesco Limited Term Municipal Income Fund | Invesco Limited Term Municipal Income Fund | Risk Lose Money [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | The Fund could lose money on investments in debt securities if the issuer or borrower fails to meet its obligations to make interest payments and/or to repay principal in a timely manner. |
| Invesco Limited Term Municipal Income Fund | Invesco Limited Term Municipal Income Fund | Risk Not Insured [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | An investment in the Fund is not a deposit in a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other governmental agency. |
| Invesco Limited Term Municipal Income Fund | Invesco Limited Term Municipal Income Fund | Risk Money Market Fund Price Fluctuates [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | The values of high yield debt securities often fluctuate more in response to political, regulatory or economic developments than higher quality bonds, and their values can decline significantly over short periods of time or during periods of economic difficulty when the bonds could be difficult to value or sell at an acceptable price, thus subjecting the Fund to a substantial risk of loss. |
| Invesco Limited Term Municipal Income Fund | Invesco Limited Term Municipal Income Fund | Market Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Market Risk. The market values of the Fund’s investments, and therefore the value of the Fund’s shares, will go up and down, sometimes rapidly or unpredictably. Market risk may affect a single issuer, industry or section of the economy, or it may affect the market as a whole. The value of the Fund’s investments may go up or down due to general market conditions that are not specifically related to the particular issuer. These market conditions may include real or perceived adverse economic conditions, changes in trade regulation or economic sanctions, changes in the general outlook for revenues or corporate earnings, changes in interest or currency rates, regional or global instability and uncertainty, natural or environmental disasters, widespread disease or other public health issues, war, military conflict, acts of terrorism, economic crisis or adverse investor sentiment generally, among others. Certain changes in the U.S. economy in particular, such as when the U.S. economy weakens or when its financial markets decline, may have a material adverse effect on global financial markets as a whole, and on the securities to which the Fund has exposure. Increasingly strained relations between the U.S. and foreign countries, including as a result of economic sanctions and tariffs, may also adversely affect U.S. issuers, as well as non-U.S. issuers.
During a general downturn in the financial markets, multiple asset classes may decline in value. When markets perform well, there can be no assurance that specific investments held by the Fund will rise in value.
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| Invesco Limited Term Municipal Income Fund | Invesco Limited Term Municipal Income Fund | Debt Securities Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Debt Securities Risk. The prices of debt securities held by the Fund will be affected by changes in interest rates, the creditworthiness of the issuer and other factors. An increase in prevailing interest rates typically causes the value of existing debt securities to fall and often has a greater impact on longer-duration debt securities and higher quality debt securities. Falling interest rates will cause the Fund to reinvest the proceeds of debt securities that have been repaid by the issuer at lower interest rates. Falling interest rates may also reduce the Fund’s distributable income because interest payments on floating rate debt instruments held by the Fund will decline. The Fund could lose money on investments in debt securities if the issuer or borrower fails to meet its obligations to make interest payments and/or to repay principal in a timely manner. Changes in an issuer’s financial strength, the market’s perception of such strength or in the credit rating of the issuer or the security may affect the value of debt securities. The credit analysis applied to the Fund’s debt securities may fail to anticipate such changes, which could result in buying a debt security at an inopportune time or failing to sell a debt security in advance of a price decline or other credit event.
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| Invesco Limited Term Municipal Income Fund | Invesco Limited Term Municipal Income Fund | Municipal Securities Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Municipal Securities Risk. The risk of a municipal obligation generally depends on the financial and credit status of the issuer. Constitutional amendments, legislative enactments, executive orders, administrative regulations, voter initiatives, and the issuer’s regional economic conditions may affect the municipal security’s value, interest payments, repayment of principal and the Fund’s ability to sell the security.
The amount of public information available about municipal securities is generally less than that for corporate equities or bonds; these limitations on access to information needed to assess the creditworthiness of a municipal security could negatively impact its liquidity.
The secondary market for certain municipal securities tends to be less well developed or liquid than many other securities markets, which may adversely affect the fund's ability to buy or sell such municipal securities at acceptable prices. Investments that are illiquid or that trade in lower volumes may be more difficult to value.
Failure of a municipal security issuer to comply with applicable tax requirements may make income paid thereon taxable, resulting in a decline in the security’s value. In addition, there could be changes in applicable tax laws or tax treatments that reduce or eliminate the current federal income tax exemption on municipal securities or otherwise adversely affect the current federal or state tax status of municipal securities.
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| Invesco Limited Term Municipal Income Fund | Invesco Limited Term Municipal Income Fund | Municipal Issuer Focus Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Municipal Issuer Focus Risk. The municipal issuers in which the Fund invests may be located in the same geographic area or may pay their interest obligations from revenue of similar projects, such as hospitals, airports, utility systems and housing finance agencies. This may make the Fund’s investments more susceptible to similar social, economic, political or regulatory occurrences, making the Fund more susceptible to experience a drop in its share price than if the Fund had been more diversified across issuers that did not have similar characteristics.
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| Invesco Limited Term Municipal Income Fund | Invesco Limited Term Municipal Income Fund | Tobacco Related Bonds Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Tobacco Related Bonds Risk. The settlement payments made by tobacco manufacturers to certain U.S. states and jurisdictions pursuant to the Master Settlement Agreement (MSA) are based on factors, including, but not limited to, annual domestic cigarette shipments, cigarette consumption, inflation and the financial capability of participating tobacco companies. Payments could be reduced if tobacco consumption decreases, if market share is lost to non-MSA manufacturers, or if there is a negative outcome in litigation regarding the MSA, including challenges by participating tobacco manufacturers regarding the amount of annual payments owed under the MSA.
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| Invesco Limited Term Municipal Income Fund | Invesco Limited Term Municipal Income Fund | Municipal Lease Obligations Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Municipal Lease Obligations Risk. Municipal lease obligations are used by state and local governments to obtain funds to acquire land, equipment or facilities. The Fund can invest in certificates of participation that represent a proportionate interest in payments made under municipal lease obligations. Most municipal lease obligations, while secured by the leased property, are not general obligations of the issuing municipality. They often contain “non-appropriation” clauses under which the municipal government has no obligation to make lease or installment payments in future years unless money is appropriated on a yearly basis.
If the municipal government stops making payments or transfers its payment obligations to a private entity, the obligation could lose value or become taxable. Although the obligation may be secured by the leased equipment or facilities, the disposition of the property in the event of non-appropriation or foreclosure might prove difficult, time consuming and costly, and may result in a delay in recovering or the failure to recover the original investment. Some lease obligations may not have an active trading market, making it difficult for the Fund to sell them quickly at an acceptable price.
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| Invesco Limited Term Municipal Income Fund | Invesco Limited Term Municipal Income Fund | Unrated Securities Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Unrated Securities Risk. The Adviser may internally assign ratings to securities that are not rated by any nationally recognized statistical rating organization, after assessing their credit quality and other factors, in categories similar to those of nationally recognized statistical rating organizations. There can be no assurance, nor is it intended, that the Adviser’s credit analysis process is consistent or comparable with the credit analysis process used by a nationally recognized statistical rating organization. Unrated securities are considered “investment-grade” or “below-investment-grade” if judged by the Adviser to be comparable to rated investment-grade or below-investment-grade securities. The Adviser's rating does not constitute a guarantee of the credit quality. In addition, some unrated securities may not have an active trading market or may trade less actively than rated securities, which means that unrated securities may be difficult to sell promptly at an acceptable rate and may be more difficult to value.
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| Invesco Limited Term Municipal Income Fund | Invesco Limited Term Municipal Income Fund | Medium- and Lower-Grade Municipal Securities Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Medium- and Lower-Grade Municipal Securities Risk. Medium- and lower-grade municipal securities generally involve more volatility and greater risks, including credit, market, liquidity and management risks, than higher-grade securities. Furthermore, many issuers of medium- and lower-grade securities choose not to have a rating assigned to their obligations. As such, the Fund’s portfolio may consist of a higher portion of unrated securities than an investment company investing solely in higher-grade securities. Unrated securities may not be as attractive to as many buyers as are rated securities, which may have the effect of limiting the Fund’s ability to sell such securities at an acceptable price and may make the securities more difficult to value. Investments that are illiquid or that trade in lower volumes may be more difficult to value.
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| Invesco Limited Term Municipal Income Fund | Invesco Limited Term Municipal Income Fund | High Yield Debt Securities (Junk Bond) Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | High Yield Debt Securities (Junk Bond) Risk. Compared to higher quality debt securities, high yield debt securities (also referred to as junk bonds or below-investment grade bonds) and other lower-rated securities involve a greater risk of default or price changes due to changes in the credit quality of the issuer. Compared to higher quality debt securities, high yield debt securities are more likely to be unsecured and are more likely to be subordinated to other creditors' claims. High yield debt securities are considered speculative with respect to the issuer’s capacity to pay interest and repay principal, are more susceptible to default or decline in market value and are less liquid than investment grade debt securities. Prices of high yield debt securities tend to be very volatile. The values of high yield debt securities often fluctuate more in response to political, regulatory or
economic developments than higher quality bonds, and their values can decline significantly over short periods of time or during periods of economic difficulty when the bonds could be difficult to value or sell at an acceptable price, thus subjecting the Fund to a substantial risk of loss. The secondary market for below investment grade securities may not be as liquid as the secondary market for more highly rated securities, a factor which may have an adverse effect on the fund's ability to dispose of a particular high yield security. There are fewer dealers in the market for high yield securities than for investment grade securities. The prices quoted by different dealers may vary significantly, and the spread between the bid and asked price is generally much larger for high yield securities than for higher quality securities.
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| Invesco Limited Term Municipal Income Fund | Invesco Limited Term Municipal Income Fund | Inverse Floating Rate Interests Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Inverse Floating Rate Interests Risk. Inverse floating rate interests (Inverse Floaters) are issued in connection with municipal tender option bond (TOB) financing transactions to generate leverage for the Fund. Such instruments are created by a special purpose trust (a TOB Trust) that holds long-term fixed rate bonds, sold to it by the Fund (the underlying security), and issues two classes of beneficial interests: short-term floating rate interests (Floaters), which are sold to other investors, and Inverse Floaters, which are purchased by the Fund. The Floaters have first priority on the cash flow from the underlying security held by the TOB Trust, have a tender option feature that allows holders to tender the Floaters back to the TOB Trust for their par amount and accrued interest at specified intervals and bear interest at prevailing short-term interest rates. Tendered Floaters are remarketed for sale to other investors for their par amount and accrued interest by a remarketing agent to the TOB Trust and are ultimately supported by a liquidity facility provided by a bank, upon which the TOB Trust can draw funds to pay such amount to holders of Tendered Floaters that cannot be remarketed. The Fund, as holder of the Inverse Floaters, is paid the residual cash flow from the underlying security. Accordingly, the Inverse Floaters provide the Fund with leveraged exposure to the underlying security. The price of Inverse Floaters is expected to decline when interest rates rise, and generally will decline more than the price of a bond with a similar maturity, because of the effect of leverage. The price of Inverse Floaters is typically more volatile than the price of bonds with similar maturities, especially if the relevant TOB Trust provides the holder of the Inverse Floaters relatively greater leveraged exposure to the underlying security (e.g., if the par amount of the Floaters, as a percentage of the par amount of the underlying security, is relatively greater). Further, as short-term interest rates rise, the interest payable on the Floaters issued by a TOB Trust also rises, leaving less residual interest cash flow from the underlying security available for payment on the Inverse Floaters. Additionally, Inverse Floaters may lose some or all of their principal and, in some cases, the Fund could lose money in excess of its investment in Inverse Floaters. Consequently, in a rising interest rate environment, the Fund’s investments in Inverse Floaters could negatively impact the Fund’s performance and yield, especially when those Inverse Floaters provide the Fund with relatively greater leveraged exposure to the relevant underlying securities.
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| Invesco Limited Term Municipal Income Fund | Invesco Limited Term Municipal Income Fund | Variable-Rate Demand Notes Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Variable-Rate Demand Notes Risk. There may not be an active secondary market with respect to particular variable and floating rate instruments in which the Fund invests, which could make it difficult to dispose of these instruments during periods that the Fund is not entitled to exercise its demand rights or if the issuer and/or remarketing agent defaulted on its payment obligation. This could cause the Fund to suffer a loss with respect to such instruments.
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| Invesco Limited Term Municipal Income Fund | Invesco Limited Term Municipal Income Fund | When-Issued, Delayed Delivery and Forward Commitment Risks [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | When-Issued, Delayed Delivery and Forward Commitment Risks. When-issued and delayed delivery transactions subject the Fund to market risk because the value or yield of a security at delivery may be more or less than the purchase price or yield generally available when delivery occurs, and counterparty risk because the Fund relies on the buyer or seller, as the case may be, to consummate the transaction. These transactions also have a leveraging effect on the Fund because the Fund commits to purchase securities that it does not have to pay for until a later date, which increases the Fund’s overall investment exposure and, as a result, its volatility.
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| Invesco Limited Term Municipal Income Fund | Invesco Limited Term Municipal Income Fund | Changing Fixed Income Market Conditions Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Changing Fixed Income Market Conditions Risk. Increases in the federal funds and equivalent foreign rates or other changes to monetary policy or regulatory actions may expose fixed income markets to heightened volatility, perhaps suddenly and to a significant degree, and to reduced liquidity for certain fixed income investments, particularly those with longer maturities. Such changes and resulting increased volatility may adversely impact the Fund, including its operations, universe of potential investment options, and return potential. It is difficult to predict the impact of interest rate changes on various markets. In addition, decreases in fixed income dealer market-making capacity may also potentially lead to heightened volatility and reduced liquidity in the fixed income markets. As a result, the value of the Fund’s investments and share price may decline. Changes in central bank policies and other governmental actions and political events within the U.S. and abroad may also, among other things, affect investor and consumer expectations and confidence in the financial markets, which could result in higher than normal redemptions by shareholders, which could potentially increase the Fund’s portfolio turnover rate and transaction costs.
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| Invesco Limited Term Municipal Income Fund | Invesco Limited Term Municipal Income Fund | Rule 144A Securities and Other Exempt Securities Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Rule 144A Securities and Other Exempt Securities Risk. The market for Rule 144A and other securities exempt from certain registration requirements may be less active than the market for publicly-traded securities. Rule 144A and other exempt securities, while initially privately placed, carry the risk that their liquidity may become impaired and the Fund may be unable to dispose of the securities at a desirable time or price.
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| Invesco Limited Term Municipal Income Fund | Invesco Limited Term Municipal Income Fund | Zero Coupon or Pay-In-Kind Securities Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Zero Coupon or Pay-In-Kind Securities Risk. The value, interest rates, and liquidity of non-cash paying instruments, such as zero coupon and pay-in-kind securities, are subject to greater fluctuation than other types of securities. The higher yields and interest rates on pay-in-kind securities reflect the payment deferral and increased credit risk associated with such instruments and that such investments may represent a higher credit risk than loans that periodically pay interest.
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| Invesco Limited Term Municipal Income Fund | Invesco Limited Term Municipal Income Fund | Borrowing and Leverage Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Borrowing and Leverage Risk. The Fund can borrow up to one-third of the value of its total assets (including the amount borrowed) from banks, as permitted by the Investment Company Act of 1940. It can use those borrowings for a number of purposes, including for purchasing securities, which can create “leverage.” In that case, changes in the value of the Fund’s investments will have a larger effect on its share price than if it did not borrow. Borrowing results in interest payments to the lenders and related expenses. Borrowing for investment purposes might reduce the Fund’s return if the yield on the securities purchased is less than those borrowing costs.
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| Invesco Limited Term Municipal Income Fund | Invesco Limited Term Municipal Income Fund | Taxability Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Taxability Risk. The Fund’s investments in municipal securities rely on the opinion of the issuer’s bond counsel that the interest paid on those securities will not be subject to federal or state income tax. Tax opinions are generally provided at the time the municipal security is initially issued. However, tax opinions are not binding on the Internal Revenue Service or any court, and after the Fund buys a security, the Internal Revenue Service or a court may determine that a bond issued as tax-exempt should in fact be taxable and the Fund’s dividends with respect to that bond might be subject to federal or state income tax. In addition, income from tax-exempt municipal securities could be declared taxable because of unfavorable changes in tax laws, adverse interpretations by the Internal Revenue Service or a court, or the non-compliant conduct of a bond issuer.
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| Invesco Limited Term Municipal Income Fund | Invesco Limited Term Municipal Income Fund | Derivatives Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Derivatives Risk. The value of a derivative instrument depends largely on (and is derived from) the value of an underlying security, currency, commodity, interest rate, index or other asset (each referred to as an underlying asset). In addition to risks relating to the underlying assets, the use of derivatives may include other, possibly greater, risks, including counterparty, leverage and liquidity risks. Counterparty risk is the risk that the counterparty to the derivative contract will default on its obligation to pay the Fund the amount owed or otherwise perform under the derivative contract. Derivatives create leverage risk because they do not require payment up front equal to the economic exposure created by holding a position in the derivative. As a result, an adverse change in the value of the underlying asset could result in the Fund sustaining a loss that is substantially greater than the amount invested in the derivative or the anticipated value of the underlying asset, which may make the Fund’s returns more volatile and increase the risk of loss. Derivative instruments may also be less liquid than more traditional investments and the Fund may be unable to sell or close out its derivative positions at a desirable time or price. This risk may be more acute under adverse market conditions, during which the Fund may be most in need of liquidating its derivative positions. Derivatives may also be harder to value, less tax efficient and subject to changing government regulation that could impact the Fund’s ability to use certain derivatives or their cost. Derivatives strategies may not always be successful. For example, derivatives used for hedging or to gain or limit exposure to a particular market segment may not provide the expected benefits, particularly during adverse market conditions.
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| Invesco Limited Term Municipal Income Fund | Invesco Limited Term Municipal Income Fund | Liquidity Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] |
Liquidity Risk. The Fund may be unable to sell illiquid investments at the time or price it desires and, as a result, could lose its entire investment in such investments. Liquid securities can become illiquid during periods of market stress. If a significant amount of the Fund’s securities become illiquid, the Fund may not be able to timely pay redemption proceeds and may need to sell securities at significantly reduced prices.
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| Invesco Limited Term Municipal Income Fund | Invesco Limited Term Municipal Income Fund | Valuation Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] |
Valuation Risk. The price the Fund could receive upon the sale of a portfolio investment may differ from the Fund’s valuation of the investment, particularly for investments that trade in thin or volatile markets or that are valued using a fair valuation methodology. Fixed income securities are often valued assuming orderly transactions of institutional round lot size, but a Fund may hold or transact in the same securities in smaller, odd lot sizes. Odd lots often trade at lower prices than institutional round lots. When market quotations are not readily available for Fund investments, those investments are fair valued by the Adviser. There are multiple methods that can be used to fair value a portfolio investment and such methods may involve more subjectivity than the use of market quotations. The value established for an investment through fair valuation may be different from what would be produced if the investment had been valued using market quotations. In addition, there is no assurance that the Fund could sell a portfolio investment at any time for the value ascribed to it for purposes of calculating the Fund’s net asset value, and it is possible that the Fund could incur a loss because an investment is sold at a discount to its ascribed value. The ability to value investments may also be impacted by technological issues and/or errors by pricing services or other third-party service providers.
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| Invesco Limited Term Municipal Income Fund | Invesco Limited Term Municipal Income Fund | Management Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Management Risk. The Fund is actively managed and depends heavily on the Adviser's judgment about markets, interest rates or the attractiveness, relative values, liquidity, or potential appreciation of particular investments made for the Fund’s portfolio. The Fund could experience losses if these judgments prove to be incorrect. There can be no guarantee that the Adviser's investment techniques or investment decisions will produce the desired results. Additionally, legislative, regulatory, or tax developments may adversely affect management of the Fund and, therefore, the ability of the Fund to achieve its investment objective.
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| INVESCO MUNICIPAL INCOME FUND | INVESCO MUNICIPAL INCOME FUND | Risk Lose Money [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | The Fund could lose money on investments in debt securities if the issuer or borrower fails to meet its obligations to make interest payments and/or to repay principal in a timely manner. |
| INVESCO MUNICIPAL INCOME FUND | INVESCO MUNICIPAL INCOME FUND | Risk Not Insured [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | An investment in the Fund is not a deposit in a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other governmental agency. |
| INVESCO MUNICIPAL INCOME FUND | INVESCO MUNICIPAL INCOME FUND | Risk Money Market Fund Price Fluctuates [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | The values of high yield debt securities often fluctuate more in response to political, regulatory or economic developments than higher quality bonds, and their values can decline significantly over short periods of time or during periods of economic difficulty when the bonds could be difficult to value or sell at an acceptable price, thus subjecting the Fund to a substantial risk of loss. |
| INVESCO MUNICIPAL INCOME FUND | INVESCO MUNICIPAL INCOME FUND | Risk Money Market Fund May Not Preserve Dollar [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Although money market funds generally seek to preserve the value of an investment at $1.00 per share, the Fund may lose money by investing in money market funds. |
| INVESCO MUNICIPAL INCOME FUND | INVESCO MUNICIPAL INCOME FUND | Market Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Market Risk. The market values of the Fund’s investments, and therefore the value of the Fund’s shares, will go up and down, sometimes rapidly or unpredictably. Market risk may affect a single issuer, industry or section of the economy, or it may affect the market as a whole. The value of the Fund’s investments may go up or down due to general market conditions that are not specifically related to the particular issuer. These market conditions may include real or perceived adverse economic conditions, changes in trade regulation or economic sanctions, changes in the general outlook for revenues or corporate earnings, changes in interest or currency rates, regional or global instability and uncertainty, natural or environmental disasters, widespread disease or other public health issues, war, military conflict, acts of terrorism, economic crisis or adverse investor sentiment generally, among others. Certain changes in the U.S. economy in particular, such as when the U.S. economy weakens or when its financial markets decline, may have a material adverse effect on global financial markets as a whole, and on the securities to which the Fund has exposure. Increasingly strained relations between the U.S. and foreign countries, including as a result of economic sanctions and tariffs, may also adversely affect U.S. issuers, as well as non-U.S. issuers.
During a general downturn in the financial markets, multiple asset classes may decline in value. When markets perform well, there can be no assurance that specific investments held by the Fund will rise in value.
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| INVESCO MUNICIPAL INCOME FUND | INVESCO MUNICIPAL INCOME FUND | Debt Securities Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Debt Securities Risk. The prices of debt securities held by the Fund will be affected by changes in interest rates, the creditworthiness of the issuer and other factors. An increase in prevailing interest rates typically causes the value of existing debt securities to fall and often has a greater impact on longer-duration debt securities and higher quality debt securities. Falling interest rates will cause the Fund to reinvest the proceeds of debt securities that have been repaid by the issuer at lower interest rates. Falling interest rates may also reduce the Fund’s distributable income because interest payments on floating rate debt instruments held by the Fund will decline. The Fund could lose money on investments in debt securities if the issuer or borrower fails to meet its obligations to make interest payments and/or to repay principal in a timely manner. Changes in an issuer’s financial strength, the market’s perception of such strength or in the credit rating of the issuer or the security may affect the value of debt securities. The credit analysis applied to the Fund’s debt securities may fail to anticipate such changes, which could result in buying a debt security at an inopportune time or failing to sell a debt security in advance of a price decline or other credit event.
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| INVESCO MUNICIPAL INCOME FUND | INVESCO MUNICIPAL INCOME FUND | Municipal Securities Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] |
Municipal Securities Risk. The risk of a municipal obligation generally depends on the financial and credit status of the issuer. Constitutional amendments, legislative enactments, executive orders, administrative regulations, voter initiatives, and the issuer’s regional economic conditions may affect the municipal security’s value, interest payments, repayment of principal and the Fund’s ability to sell the security. The amount of public information available about municipal securities is generally less than that for corporate equities or bonds; these limitations on access to information needed to assess the creditworthiness of a municipal security could negatively impact its liquidity.
The secondary market for certain municipal securities tends to be less well developed or liquid than many other securities markets, which may adversely affect the fund's ability to buy or sell such municipal securities at acceptable prices. Investments that are illiquid or that trade in lower volumes may be more difficult to value.
Failure of a municipal security issuer to comply with applicable tax requirements may make income paid thereon taxable, resulting in a decline in the security’s value. In addition, there could be changes in applicable tax laws or tax treatments that reduce or eliminate the current federal income tax exemption on municipal securities or otherwise adversely affect the current federal or state tax status of municipal securities.
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| INVESCO MUNICIPAL INCOME FUND | INVESCO MUNICIPAL INCOME FUND | Municipal Issuer Focus Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Municipal Issuer Focus Risk. The municipal issuers in which the Fund invests may be located in the same geographic area or may pay their interest obligations from revenue of similar projects, such as hospitals, airports, utility systems and housing finance agencies. This may make the Fund’s investments more susceptible to similar social, economic, political or regulatory occurrences, making the Fund more susceptible to experience a drop in its share price than if the Fund had been more diversified across issuers that did not have similar characteristics.
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| INVESCO MUNICIPAL INCOME FUND | INVESCO MUNICIPAL INCOME FUND | Tobacco Related Bonds Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Tobacco Related Bonds Risk. The settlement payments made by tobacco manufacturers to certain U.S. states and jurisdictions pursuant to the Master Settlement Agreement (MSA) are based on factors, including, but not limited to, annual domestic cigarette shipments, cigarette consumption, inflation and the financial capability of participating tobacco companies. Payments could be reduced if tobacco consumption decreases, if market share is lost to non-MSA manufacturers, or if there is a negative outcome in litigation regarding the MSA, including challenges by participating tobacco manufacturers regarding the amount of annual payments owed under the MSA.
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| INVESCO MUNICIPAL INCOME FUND | INVESCO MUNICIPAL INCOME FUND | Municipal Lease Obligations Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Municipal Lease Obligations Risk. Municipal lease obligations are used by state and local governments to obtain funds to acquire land, equipment or facilities. The Fund can invest in certificates of participation that represent a proportionate interest in payments made under municipal lease obligations. Most municipal lease obligations, while secured by the leased property, are not general obligations of the issuing municipality. They often contain “non-appropriation” clauses under which the municipal government has no obligation to make lease or installment payments in future years unless money is appropriated on a yearly basis.
If the municipal government stops making payments or transfers its payment obligations to a private entity, the obligation could lose value or become taxable. Although the obligation may be secured by the leased equipment or facilities, the disposition of the property in the event of non-appropriation or foreclosure might prove difficult, time consuming and costly, and may result in a delay in recovering or the failure to recover the original investment. Some lease obligations may not have an active trading market, making it difficult for the Fund to sell them quickly at an acceptable price.
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| INVESCO MUNICIPAL INCOME FUND | INVESCO MUNICIPAL INCOME FUND | Money Market Fund Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Money Market Fund Risk. Although money market funds generally seek to preserve the value of an investment at $1.00 per share, the Fund may lose money by investing in money market funds. A money market fund's sponsor is not required to reimburse the money market fund for losses. The credit quality of a money market fund's holdings can change rapidly in certain markets, and the default of a single holding could have an adverse impact on the money market fund's share price. A money market fund's share price can also be negatively affected during periods of high redemption pressures, illiquid markets and/or significant market volatility.
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| INVESCO MUNICIPAL INCOME FUND | INVESCO MUNICIPAL INCOME FUND | Unrated Securities Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Unrated Securities Risk. The Adviser may internally assign ratings to securities that are not rated by any nationally recognized statistical rating organization, after assessing their credit quality and other factors, in categories similar to those of nationally recognized statistical rating organizations. There can be no assurance, nor is it intended, that the Adviser’s credit analysis process is consistent or comparable with the credit analysis process used by a nationally recognized statistical rating organization. Unrated securities are considered “investment-grade” or “below-investment-grade” if judged by the Adviser to be comparable to rated investment-grade or below-investment-grade securities. The Adviser's rating does not constitute a guarantee of the credit quality. In addition, some unrated securities may not have an active trading market or may trade less actively than rated securities, which means that unrated securities may be difficult to sell promptly at an acceptable rate and may be more difficult to value.
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| INVESCO MUNICIPAL INCOME FUND | INVESCO MUNICIPAL INCOME FUND | Medium- and Lower-Grade Municipal Securities Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Medium- and Lower-Grade Municipal Securities Risk. Medium- and lower-grade municipal securities generally involve more volatility and greater risks, including credit, market, liquidity and management risks, than higher-grade securities. Furthermore, many issuers of medium- and lower-grade securities choose not to have a rating assigned to their obligations. As such, the Fund’s portfolio may consist of a higher portion of unrated securities than an investment company investing solely in higher-grade securities. Unrated securities may not be as attractive to as many buyers as are rated securities, which may have the effect of limiting the Fund’s ability to sell such securities at an acceptable price and may make the securities more difficult to value. Investments that are illiquid or that trade in lower volumes may be more difficult to value.
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| INVESCO MUNICIPAL INCOME FUND | INVESCO MUNICIPAL INCOME FUND | High Yield Debt Securities (Junk Bond) Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | High Yield Debt Securities (Junk Bond) Risk. Compared to higher quality debt securities, high yield debt securities (also referred to as junk bonds or below-investment grade bonds) and other lower-rated securities involve a greater risk of default or price changes due to changes in the credit quality of the issuer. Compared to higher quality debt securities, high yield debt securities are more likely to be unsecured and are more likely to be subordinated to other creditors' claims. High yield debt securities are considered speculative with respect to the issuer’s capacity to pay interest and repay principal, are more susceptible to default or decline in market value and are less liquid than investment grade debt securities. Prices of high yield debt securities tend to be very volatile. The values of high yield debt securities often fluctuate more in response to political, regulatory or economic developments than higher quality bonds, and their values can decline significantly over short periods of time or during periods of economic difficulty when the bonds could be difficult to value or sell at an acceptable price, thus subjecting the Fund to a substantial risk of loss. The secondary market for below investment grade securities may not be as liquid as the secondary market for more highly rated securities, a factor which may have an adverse effect on the fund's ability to dispose of a particular high yield security. There are fewer dealers in the market for high yield securities than for investment grade securities. The prices quoted by different dealers may
vary significantly, and the spread between the bid and asked price is generally much larger for high yield securities than for higher quality securities.
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| INVESCO MUNICIPAL INCOME FUND | INVESCO MUNICIPAL INCOME FUND | Inverse Floating Rate Interests Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Inverse Floating Rate Interests Risk. Inverse floating rate interests (Inverse Floaters) are issued in connection with municipal tender option bond (TOB) financing transactions to generate leverage for the Fund. Such instruments are created by a special purpose trust (a TOB Trust) that holds long-term fixed rate bonds, sold to it by the Fund (the underlying security), and issues two classes of beneficial interests: short-term floating rate interests (Floaters), which are sold to other investors, and Inverse Floaters, which are purchased by the Fund. The Floaters have first priority on the cash flow from the underlying security held by the TOB Trust, have a tender option feature that allows holders to tender the Floaters back to the TOB Trust for their par amount and accrued interest at specified intervals and bear interest at prevailing short-term interest rates. Tendered Floaters are remarketed for sale to other investors for their par amount and accrued interest by a remarketing agent to the TOB Trust and are ultimately supported by a liquidity facility provided by a bank, upon which the TOB Trust can draw funds to pay such amount to holders of Tendered Floaters that cannot be remarketed. The Fund, as holder of the Inverse Floaters, is paid the residual cash flow from the underlying security. Accordingly, the Inverse Floaters provide the Fund with leveraged exposure to the underlying security. The price of Inverse Floaters is expected to decline when interest rates rise, and generally will decline more than the price of a bond with a similar maturity, because of the effect of leverage. The price of Inverse Floaters is typically more volatile than the price of bonds with similar maturities, especially if the relevant TOB Trust provides the holder of the Inverse Floaters relatively greater leveraged exposure to the underlying security (e.g., if the par amount of the Floaters, as a percentage of the par amount of the underlying security, is relatively greater). Further, as short-term interest rates rise, the interest payable on the Floaters issued by a TOB Trust also rises, leaving less residual interest cash flow from the underlying security available for payment on the Inverse Floaters. Additionally, Inverse Floaters may lose some or all of their principal and, in some cases, the Fund could lose money in excess of its investment in Inverse Floaters. Consequently, in a rising interest rate environment, the Fund’s investments in Inverse Floaters could negatively impact the Fund’s performance and yield, especially when those Inverse Floaters provide the Fund with relatively greater leveraged exposure to the relevant underlying securities.
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| INVESCO MUNICIPAL INCOME FUND | INVESCO MUNICIPAL INCOME FUND | Variable-Rate Demand Notes Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Variable-Rate Demand Notes Risk. There may not be an active secondary market with respect to particular variable and floating rate instruments in which the Fund invests, which could make it difficult to dispose of these instruments during periods that the Fund is not entitled to exercise its demand rights or if the issuer and/or remarketing agent defaulted on its payment obligation. This could cause the Fund to suffer a loss with respect to such instruments.
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| INVESCO MUNICIPAL INCOME FUND | INVESCO MUNICIPAL INCOME FUND | When-Issued, Delayed Delivery and Forward Commitment Risks [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | When-Issued, Delayed Delivery and Forward Commitment Risks. When-issued and delayed delivery transactions subject the Fund to market risk because the value or yield of a security at delivery may be more or less than the purchase price or yield generally available when delivery occurs, and counterparty risk because the Fund relies on the buyer or seller, as the case may be, to consummate the transaction. These transactions also have a leveraging effect on the Fund because the Fund commits to purchase securities that it does not have to pay for until a later date, which increases the Fund’s overall investment exposure and, as a result, its volatility.
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| INVESCO MUNICIPAL INCOME FUND | INVESCO MUNICIPAL INCOME FUND | Changing Fixed Income Market Conditions Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Changing Fixed Income Market Conditions Risk. Increases in the federal funds and equivalent foreign rates or other changes to monetary policy or regulatory actions may expose fixed income markets to heightened volatility, perhaps suddenly and to a significant degree, and to reduced liquidity for certain fixed income investments, particularly those with longer maturities. Such changes and resulting increased volatility may adversely impact the Fund, including its operations, universe of potential investment options, and return potential. It is difficult to predict the impact of interest rate changes on various markets. In addition, decreases in fixed income dealer market-making capacity may also potentially lead to heightened volatility and reduced liquidity in the fixed income markets. As a result, the value of the Fund’s investments and share price may decline. Changes in central bank policies and other governmental actions and political events within the U.S. and abroad may also, among other things, affect investor and consumer expectations and confidence in the financial markets, which could result in higher than normal redemptions by shareholders, which could potentially increase the Fund’s portfolio turnover rate and transaction costs.
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| INVESCO MUNICIPAL INCOME FUND | INVESCO MUNICIPAL INCOME FUND | Rule 144A Securities and Other Exempt Securities Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Rule 144A Securities and Other Exempt Securities Risk. The market for Rule 144A and other securities exempt from certain registration requirements may be less active than the market for publicly-traded securities. Rule 144A and other exempt securities, while initially privately placed, carry the risk that their liquidity may become impaired and the Fund may be unable to dispose of the securities at a desirable time or price.
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| INVESCO MUNICIPAL INCOME FUND | INVESCO MUNICIPAL INCOME FUND | Zero Coupon or Pay-In-Kind Securities Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Zero Coupon or Pay-In-Kind Securities Risk. The value, interest rates, and liquidity of non-cash paying instruments, such as zero coupon and pay-in-kind securities, are subject to greater fluctuation than other types of securities. The higher yields and interest rates on pay-in-kind securities reflect the payment deferral and increased credit risk associated with such instruments and that such investments may represent a higher credit risk than loans that periodically pay interest.
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| INVESCO MUNICIPAL INCOME FUND | INVESCO MUNICIPAL INCOME FUND | Borrowing and Leverage Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Borrowing and Leverage Risk. The Fund can borrow up to one-third of the value of its total assets (including the amount borrowed) from banks, as permitted by the Investment Company Act of 1940. It can use those borrowings for a number of purposes, including for purchasing securities, which can create “leverage.” In that case, changes in the value of the Fund’s investments will have a larger effect on its share price than if it did not borrow. Borrowing results in interest payments to the lenders and related expenses. Borrowing for investment purposes might reduce the Fund’s return if the yield on the securities purchased is less than those borrowing costs.
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| INVESCO MUNICIPAL INCOME FUND | INVESCO MUNICIPAL INCOME FUND | Alternative Minimum Tax Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Alternative Minimum Tax Risk. All or a portion of the Fund’s otherwise tax-exempt income may be taxable to those shareholders subject to the federal alternative minimum tax.
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| INVESCO MUNICIPAL INCOME FUND | INVESCO MUNICIPAL INCOME FUND | Taxability Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Taxability Risk. The Fund’s investments in municipal securities rely on the opinion of the issuer’s bond counsel that the interest paid on those securities will not be subject to federal or state income tax. Tax opinions are generally provided at the time the municipal security is initially issued. However, tax opinions are not binding on the Internal Revenue Service or any court, and after the Fund buys a security, the Internal Revenue Service or a court may determine that a bond issued as tax-exempt should in fact be taxable and the Fund’s dividends with respect to that bond might be subject to federal or state income tax. In addition, income from tax-exempt municipal securities could be declared taxable because of unfavorable changes in tax laws, adverse interpretations by the Internal Revenue Service or a court, or the non-compliant conduct of a bond issuer.
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| INVESCO MUNICIPAL INCOME FUND | INVESCO MUNICIPAL INCOME FUND | Derivatives Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Derivatives Risk. The value of a derivative instrument depends largely on (and is derived from) the value of an underlying security, currency, commodity, interest rate, index or other asset (each referred to as an underlying asset). In addition to risks relating to the underlying assets, the use of derivatives may include other, possibly greater, risks, including counterparty, leverage and liquidity risks. Counterparty risk is the risk that the counterparty to the derivative contract will default on its obligation to pay the Fund the amount owed or otherwise perform under the derivative contract. Derivatives create leverage risk because they do not require payment up front equal to the economic exposure created by holding a position in the derivative. As a result, an adverse change in the value of the underlying asset could result in the Fund sustaining a loss that is substantially greater than the amount invested in the derivative or the anticipated value of the underlying asset, which may make the Fund’s returns more volatile and increase the risk of loss. Derivative instruments may also be less liquid than more traditional investments and the Fund may be unable to sell or close out its derivative positions at a desirable time or price. This risk may be more acute under adverse market conditions, during which the Fund may be most in need of liquidating its derivative positions. Derivatives may also be harder to value, less tax efficient and subject to changing government regulation that could impact the Fund’s ability to use certain derivatives or their cost. Derivatives strategies may not always be successful. For example, derivatives used for hedging or to gain or limit exposure to a particular market segment may not provide the expected benefits, particularly during adverse market conditions.
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| INVESCO MUNICIPAL INCOME FUND | INVESCO MUNICIPAL INCOME FUND | Liquidity Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] |
Liquidity Risk. The Fund may be unable to sell illiquid investments at the time or price it desires and, as a result, could lose its entire investment in such investments. Liquid securities can become illiquid during periods of market stress. If a significant amount of the Fund’s securities become illiquid, the Fund may not be able to timely pay redemption proceeds and may need to sell securities at significantly reduced prices.
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| INVESCO MUNICIPAL INCOME FUND | INVESCO MUNICIPAL INCOME FUND | Valuation Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] |
Valuation Risk. The price the Fund could receive upon the sale of a portfolio investment may differ from the Fund’s valuation of the investment, particularly for investments that trade in thin or volatile markets or that are valued using a fair valuation methodology. Fixed income securities are often valued assuming orderly transactions of institutional round lot size, but a Fund may hold or transact in the same securities in smaller, odd lot sizes. Odd lots often trade at lower prices than institutional round lots. When market quotations are not readily available for Fund investments, those investments are fair valued by the Adviser. There are multiple methods that can be used to fair value a portfolio investment and such methods may involve more subjectivity than the use of market quotations. The value established for an investment through fair valuation may be different from what would be produced if the investment had been valued using market quotations. In addition, there is no assurance that the Fund could sell a portfolio investment at any time for the value ascribed to it for purposes of calculating the Fund’s net asset value, and it is possible that the Fund could incur a loss because an investment is sold at a discount to its ascribed value. The ability to value investments may also be impacted by technological issues and/or errors by pricing services or other third-party service providers.
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| INVESCO MUNICIPAL INCOME FUND | INVESCO MUNICIPAL INCOME FUND | Management Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Management Risk. The Fund is actively managed and depends heavily on the Adviser's judgment about markets, interest rates or the attractiveness, relative values, liquidity, or potential appreciation of particular investments made for the Fund’s portfolio. The Fund could experience losses if these judgments prove to be incorrect. There can be no guarantee that the Adviser's investment techniques or investment decisions will produce the desired results. Additionally, legislative, regulatory, or tax developments may adversely affect management of the Fund and, therefore, the ability of the Fund to achieve its investment objective.
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| Invesco New Jersey Municipal Fund | Invesco New Jersey Municipal Fund | Risk Lose Money [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | The Fund could lose money on investments in debt securities if the issuer or borrower fails to meet its obligations to make interest payments and/or to repay principal in a timely manner. |
| Invesco New Jersey Municipal Fund | Invesco New Jersey Municipal Fund | Risk Not Insured [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | An investment in the Fund is not a deposit in a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other governmental agency. |
| Invesco New Jersey Municipal Fund | Invesco New Jersey Municipal Fund | Risk Nondiversified Status [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] |
Non-Diversification Risk. The Fund is non-diversified and can invest a greater portion of its assets in the obligations or securities of a small number of issuers or any single issuer than a diversified fund can. A change in the value of one or a few issuers’ securities will therefore affect the value of the Fund more than if it was a diversified fund. This may increase the Fund’s volatility and cause the performance of a relatively small number of issuers to have a greater impact on the Fund’s performance.
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| Invesco New Jersey Municipal Fund | Invesco New Jersey Municipal Fund | Risk Money Market Fund Price Fluctuates [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | The values of high yield debt securities often fluctuate more in response to political, regulatory or economic developments than higher quality bonds, and their values can decline significantly over short periods of time or during periods of economic difficulty when the bonds could be difficult to value or sell at an acceptable price, thus subjecting the Fund to a substantial risk of loss. |
| Invesco New Jersey Municipal Fund | Invesco New Jersey Municipal Fund | Market Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Market Risk. The market values of the Fund’s investments, and therefore the value of the Fund’s shares, will go up and down, sometimes rapidly or unpredictably. Market risk may affect a single issuer, industry or section of the economy, or it may affect the market as a whole. The value of the Fund’s investments may go up or down due to general market conditions that are not specifically related to the particular issuer. These market conditions may include real or perceived adverse economic conditions, changes in trade regulation or economic sanctions, changes in the general outlook for revenues or corporate earnings, changes in interest or currency rates, regional or global instability and uncertainty, natural or environmental disasters, widespread disease or other public health issues, war, military conflict, acts of terrorism, economic crisis or adverse investor sentiment generally, among others. Certain changes in the U.S. economy in particular, such as when the U.S. economy weakens or when its financial markets decline, may have a material adverse effect on global financial markets as a whole, and on the securities to which the Fund has exposure. Increasingly strained relations between the U.S. and foreign countries, including as a result of economic sanctions and tariffs, may also adversely affect U.S. issuers, as well as non-U.S. issuers.
During a general downturn in the financial markets, multiple asset classes may decline in value. When markets perform well, there can be no assurance that specific investments held by the Fund will rise in value.
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| Invesco New Jersey Municipal Fund | Invesco New Jersey Municipal Fund | Debt Securities Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Debt Securities Risk. The prices of debt securities held by the Fund will be affected by changes in interest rates, the creditworthiness of the issuer and other factors. An increase in prevailing interest rates typically causes the value of existing debt securities to fall and often has a greater impact on longer-duration debt securities and higher quality debt securities. Falling interest rates will cause the Fund to reinvest the proceeds of debt securities that have been repaid by the issuer at lower interest rates. Falling interest rates may also reduce the Fund’s distributable income because interest payments on floating rate debt instruments held by the Fund will decline. The Fund could lose money on investments in debt securities if the issuer or borrower fails to meet its obligations to make interest payments and/or to repay principal in a timely manner. Changes in an issuer’s financial strength, the market’s perception of such strength or in the credit rating of the issuer or the security may affect the value of debt securities. The credit analysis applied to the Fund’s debt securities may fail to anticipate such changes, which could result in buying a debt security at an inopportune time or failing to sell a debt security in advance of a price decline or other credit event.
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| Invesco New Jersey Municipal Fund | Invesco New Jersey Municipal Fund | Municipal Securities Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] |
Municipal Securities Risk. The risk of a municipal obligation generally depends on the financial and credit status of the issuer. Constitutional amendments, legislative enactments, executive orders, administrative regulations, voter initiatives, and the issuer’s regional economic conditions may affect the municipal security’s value, interest payments, repayment of principal and the Fund’s ability to sell the security.
The amount of public information available about municipal securities is generally less than that for corporate equities or bonds; these limitations on access to information needed to assess the creditworthiness of a municipal security could negatively impact its liquidity.
The secondary market for certain municipal securities tends to be less well developed or liquid than many other securities markets, which may adversely affect the fund's ability to buy or sell such municipal securities at acceptable prices. Investments that are illiquid or that trade in lower volumes may be more difficult to value.
Failure of a municipal security issuer to comply with applicable tax requirements may make income paid thereon taxable, resulting in a decline in the security’s value. In addition, there could be changes in applicable tax laws or tax treatments that reduce or eliminate the current federal income tax exemption on municipal securities or otherwise adversely affect the current federal or state tax status of municipal securities.
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| Invesco New Jersey Municipal Fund | Invesco New Jersey Municipal Fund | New Jersey Municipal Securities Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | New Jersey Municipal Securities Risk. The Fund is more susceptible to political, economic, regulatory or other factors affecting issuers of New Jersey municipal securities than a fund which does not focus its investments in such issuers. Accordingly, events in New Jersey may affect the Fund’s investments and performance.
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| Invesco New Jersey Municipal Fund | Invesco New Jersey Municipal Fund | Municipal Issuer Focus Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Municipal Issuer Focus Risk. The municipal issuers in which the Fund invests may be located in the same geographic area or may pay their interest obligations from revenue of similar projects, such as hospitals, airports, utility systems and housing finance agencies. This may make the Fund’s investments more susceptible to similar social, economic, political or regulatory occurrences, making the Fund more susceptible to experience a drop in its share price than if the Fund had been more diversified across issuers that did not have similar characteristics.
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| Invesco New Jersey Municipal Fund | Invesco New Jersey Municipal Fund | Investing in U.S. Territories, Commonwealths and Possessions Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Investing in U.S. Territories, Commonwealths and Possessions Risk. The Fund also invests in obligations of the governments of U.S. territories, commonwealths and possessions such as Puerto Rico, the U.S. Virgin Islands, Guam and the Northern Mariana Islands to the extent such obligations are exempt from regular federal individual and state income taxes. These investments also are considered to be “New Jersey municipal securities” for purposes of this prospectus. Accordingly, the Fund may be adversely affected by local political, economic, social and environmental conditions and developments, including natural disasters, within these U.S. territories, commonwealths and possessions affecting the issuers of such obligations.
Certain of the municipalities in which the Fund invests, including Puerto Rico, currently experience significant financial difficulties, which may include default, insolvency or bankruptcy. As a result, securities issued by certain of these municipalities are currently considered below-investment-grade securities. A credit rating downgrade relating to, default by, or insolvency or bankruptcy of, one or several municipal security issuers of a state, territory, commonwealth or possession in which the Fund invests could affect the payment of principal and interest, the market values and marketability of many or all municipal obligations of such state, territory, commonwealth or possession.
In the past several years, securities issued by Puerto Rico and its agencies and instrumentalities have been subject to multiple credit downgrades as a result of Puerto Rico’s ongoing fiscal challenges, growing debt obligations and uncertainty about its ability to make full repayment on these obligations, and certain issuers of Puerto Rican municipal securities have filed for bankruptcy and/or failed to make payments on obligations that have come due. Such developments could adversely impact the Fund’s performance and the Fund may pay expenses to preserve its claims related to its Puerto Rican holdings. The outcome of the debt restructuring of certain Puerto Rican issuers in which the Fund invests, both within and outside bankruptcy proceedings is uncertain, and could adversely affect the Fund.
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| Invesco New Jersey Municipal Fund | Invesco New Jersey Municipal Fund | Tobacco Related Bonds Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Tobacco Related Bonds Risk. The settlement payments made by tobacco manufacturers to certain U.S. states and jurisdictions pursuant to the Master Settlement Agreement (MSA) are based on factors, including, but not limited to, annual domestic cigarette shipments, cigarette consumption, inflation and the financial capability of participating tobacco companies. Payments could be reduced if tobacco consumption decreases, if market share is lost to non-MSA manufacturers, or if there is a negative outcome in litigation regarding the MSA, including challenges by participating tobacco manufacturers regarding the amount of annual payments owed under the MSA.
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| Invesco New Jersey Municipal Fund | Invesco New Jersey Municipal Fund | Land-Secured or “Dirt” Bonds Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Land-Secured or “Dirt” Bonds Risk. These bonds, which include special assessment, special tax, and tax increment financing bonds, are issued to promote residential, commercial and industrial growth and redevelopment. They are exposed to real estate development-related risks. The bonds could default if the developments failed to progress as anticipated or if taxpayers failed to pay the assessments, fees and taxes specified in the financing plans for a project.
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| Invesco New Jersey Municipal Fund | Invesco New Jersey Municipal Fund | Municipal Lease Obligations Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Municipal Lease Obligations Risk. Municipal lease obligations are used by state and local governments to obtain funds to acquire land, equipment or facilities. The Fund can invest in certificates of participation that represent a proportionate interest in payments made under municipal lease obligations. Most municipal lease obligations, while secured by the leased property, are not general obligations of the issuing municipality. They often contain “non-appropriation” clauses under which the municipal government has no obligation to make lease or installment payments in future years unless money is appropriated on a yearly basis.
If the municipal government stops making payments or transfers its payment obligations to a private entity, the obligation could lose value or become taxable. Although the obligation may be secured by the leased equipment or facilities, the disposition of the property in the event of non-appropriation or foreclosure might prove difficult, time consuming and costly, and may result in a delay in recovering or the failure to recover the original investment. Some lease obligations may not have an active trading market, making it difficult for the Fund to sell them quickly at an acceptable price.
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| Invesco New Jersey Municipal Fund | Invesco New Jersey Municipal Fund | Unrated Securities Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] |
Unrated Securities Risk. The Adviser may internally assign ratings to securities that are not rated by any nationally recognized statistical rating organization, after assessing their credit quality and other factors, in categories similar to those of nationally recognized statistical rating organizations. There can be no assurance, nor is it intended, that the Adviser’s credit analysis process is consistent or comparable with the credit analysis process used by a nationally recognized statistical rating organization. Unrated securities are considered “investment-grade” or “below-investment-grade” if judged by the Adviser to be comparable to rated investment-grade or below-investment-grade securities. The Adviser's rating does not constitute a guarantee of the credit quality. In addition, some unrated securities may not have an active trading market or may trade less actively than rated securities, which means that unrated securities may be difficult to sell promptly at an acceptable rate and may be more difficult to value.
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| Invesco New Jersey Municipal Fund | Invesco New Jersey Municipal Fund | Medium- and Lower-Grade Municipal Securities Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Medium- and Lower-Grade Municipal Securities Risk. Medium- and lower-grade municipal securities generally involve more volatility and greater risks, including credit, market, liquidity and management risks, than higher-grade securities. Furthermore, many issuers of medium- and lower-grade securities choose not to have a rating assigned to their obligations. As such, the Fund’s portfolio may consist of a higher portion of unrated securities than an investment company investing solely in higher-grade securities. Unrated securities may not be as attractive to as many buyers as are rated securities, which may have the effect of limiting the Fund’s ability to sell such securities at an acceptable price and may make the securities more difficult to value. Investments that are illiquid or that trade in lower volumes may be more difficult to value.
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| Invesco New Jersey Municipal Fund | Invesco New Jersey Municipal Fund | High Yield Debt Securities (Junk Bond) Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | High Yield Debt Securities (Junk Bond) Risk. Compared to higher quality debt securities, high yield debt securities (also referred to as junk bonds or below-investment grade bonds) and other lower-rated securities involve a greater risk of default or price changes due to changes in the credit quality of the issuer. Compared to higher quality debt securities, high yield debt securities are more likely to be unsecured and are more likely to be subordinated to other creditors' claims. High yield debt securities are considered speculative with respect to the issuer’s capacity to pay interest and repay principal, are more susceptible to default or decline in market value and are less liquid than investment grade debt securities. Prices of high yield debt securities tend to be very volatile. The values of high yield debt securities often fluctuate more in response to political, regulatory or economic developments than higher quality bonds, and their values can decline significantly over short periods of time or during periods of economic difficulty when the bonds could be difficult to value or sell at an acceptable price, thus subjecting the Fund to a substantial risk of loss. The secondary market for below investment grade securities may not be as liquid as the secondary market for more highly rated securities, a factor which may have an adverse effect on the fund's ability to dispose of a particular high yield security. There are fewer dealers in the market for high yield securities than for investment grade securities. The prices quoted by different dealers may vary significantly, and the spread between the bid and asked price is generally much larger for high yield securities than for higher quality securities.
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| Invesco New Jersey Municipal Fund | Invesco New Jersey Municipal Fund | Inverse Floating Rate Interests Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Inverse Floating Rate Interests Risk. Inverse floating rate interests (Inverse Floaters) are issued in connection with municipal tender option bond (TOB) financing transactions to generate leverage for the Fund. Such instruments are created by a special purpose trust (a TOB Trust) that holds long-term fixed rate bonds, sold to it by the Fund (the underlying security), and issues two classes of beneficial interests: short-term floating rate interests (Floaters), which are sold to other investors, and Inverse Floaters, which are purchased by the Fund. The Floaters have first priority on the cash flow from the underlying security held by the TOB Trust, have a tender option feature that allows holders to tender the Floaters back to the TOB Trust for their par amount and accrued interest at specified intervals and bear interest at prevailing short-term interest rates. Tendered Floaters are remarketed for sale to other investors for their par amount and accrued interest by a remarketing agent to the TOB Trust and are ultimately supported by a liquidity facility provided by a bank, upon which the TOB Trust can draw funds to pay such amount to holders of Tendered Floaters that cannot be remarketed. The Fund, as holder of the Inverse Floaters, is paid the residual cash flow from the underlying security. Accordingly, the Inverse Floaters provide the Fund with leveraged exposure to the underlying security. The price of Inverse Floaters is expected to decline when interest rates rise, and generally will decline more than the price of a bond with a similar maturity, because of the effect of leverage. The price of Inverse Floaters is typically more volatile than the price of bonds with similar maturities, especially if the relevant TOB Trust provides the holder of the Inverse Floaters relatively greater leveraged exposure to the underlying security (e.g., if the par amount of the Floaters, as a percentage of the par amount of the underlying security, is relatively greater). Further, as short-term interest rates rise, the interest payable on the Floaters issued by a TOB Trust also rises, leaving less residual interest cash flow from the underlying security available for payment on the Inverse Floaters. Additionally, Inverse Floaters may lose some or all of their principal and, in some cases, the Fund could lose money in excess of its investment in Inverse Floaters. Consequently, in a rising interest rate environment, the Fund’s investments in Inverse Floaters could negatively impact the Fund’s performance and yield, especially when those Inverse Floaters provide the Fund with relatively greater leveraged exposure to the relevant underlying securities.
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| Invesco New Jersey Municipal Fund | Invesco New Jersey Municipal Fund | Variable-Rate Demand Notes Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Variable-Rate Demand Notes Risk. There may not be an active secondary market with respect to particular variable and floating rate instruments in which the Fund invests, which could make it difficult to dispose of these instruments during periods that the Fund is not entitled to exercise its demand rights or if the issuer and/or remarketing agent defaulted on its payment obligation. This could cause the Fund to suffer a loss with respect to such instruments.
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| Invesco New Jersey Municipal Fund | Invesco New Jersey Municipal Fund | Changing Fixed Income Market Conditions Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Changing Fixed Income Market Conditions Risk. Increases in the federal funds and equivalent foreign rates or other changes to monetary policy or regulatory actions may expose fixed income markets to heightened volatility, perhaps suddenly and to a significant degree, and to reduced liquidity for certain fixed income investments, particularly those with longer maturities. Such changes and resulting increased volatility may adversely impact the Fund, including its operations, universe of potential investment options, and return potential. It is difficult to predict the impact of interest rate changes on various markets. In addition, decreases in fixed income dealer market-making capacity may also potentially lead to heightened volatility and reduced liquidity in the fixed income markets. As a result, the value of the Fund’s investments and share price may decline. Changes in central bank policies and other governmental actions and political events within the U.S. and abroad may also, among other things, affect investor and consumer expectations and confidence in the financial markets, which could result in higher than normal redemptions by shareholders, which could potentially increase the Fund’s portfolio turnover rate and transaction costs.
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| Invesco New Jersey Municipal Fund | Invesco New Jersey Municipal Fund | Zero Coupon or Pay-In-Kind Securities Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Zero Coupon or Pay-In-Kind Securities Risk. The value, interest rates, and liquidity of non-cash paying instruments, such as zero coupon and pay-in-kind securities, are subject to greater fluctuation than other types of securities. The higher yields and interest rates on pay-in-kind securities reflect the payment deferral and increased credit risk associated with such instruments and that such investments may represent a higher credit risk than loans that periodically pay interest.
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| Invesco New Jersey Municipal Fund | Invesco New Jersey Municipal Fund | Reverse Repurchase Agreement Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Reverse Repurchase Agreement Risk. Reverse repurchase agreements involve the risk that the market value of securities to be repurchased may decline below the repurchase price resulting in a requirement for the Fund to deliver margin to the other party in the amount of the related shortfall. If the other party defaults on its obligation, the Fund may be delayed or prevented from completing the transaction. In the event the buyer of securities under a reverse repurchase agreement files for bankruptcy or becomes insolvent, the Fund’s use of the proceeds from the sale of the securities may be restricted. When the Fund engages in reverse repurchase agreements, changes in the value of the Fund’s investments will have a larger effect on its share price than if it did not engage in these transactions due to the effect of leverage, which will make the Fund’s returns more volatile and increase the risk of loss. Additionally, interest expenses related to reverse repurchase agreements could exceed the rate of return on investments held by the Fund, thereby reducing returns to shareholders.
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| Invesco New Jersey Municipal Fund | Invesco New Jersey Municipal Fund | Borrowing and Leverage Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Borrowing and Leverage Risk. The Fund can borrow up to one-third of the value of its total assets (including the amount borrowed) from banks, as permitted by the Investment Company Act of 1940. It can use those borrowings for a number of purposes, including for purchasing securities, which can create “leverage.” In that case, changes in the value of the Fund’s investments will have a larger effect on its share price than if it did not borrow. Borrowing results in interest payments to the lenders and related expenses. Borrowing for investment purposes might reduce the Fund’s return if the yield on the securities purchased is less than those borrowing costs.
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| Invesco New Jersey Municipal Fund | Invesco New Jersey Municipal Fund | Alternative Minimum Tax Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Alternative Minimum Tax Risk. A portion of the Fund’s otherwise tax-exempt income may be taxable to those shareholders subject to the federal alternative minimum tax.
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| Invesco New Jersey Municipal Fund | Invesco New Jersey Municipal Fund | Taxability Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Taxability Risk. The Fund’s investments in municipal securities rely on the opinion of the issuer’s bond counsel that the interest paid on those securities will not be subject to federal or state income tax. Tax opinions are generally provided at the time the municipal security is initially issued. However, tax opinions are not binding on the Internal Revenue Service, state tax authorities or any court, and after the Fund buys a security, the Internal Revenue Service, state tax authorities or a court may determine that a bond issued as tax-exempt should in fact be taxable and the Fund’s dividends with respect to that bond might be subject to federal or state income tax. In addition, income from tax-exempt municipal securities could be declared taxable because of unfavorable changes in tax laws, adverse interpretations by the Internal Revenue Service, state tax authorities or a court, or the non-compliant conduct of a bond issuer.
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| Invesco New Jersey Municipal Fund | Invesco New Jersey Municipal Fund | Derivatives Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Derivatives Risk. The value of a derivative instrument depends largely on (and is derived from) the value of an underlying security, currency, commodity, interest rate, index or other asset (each referred to as an underlying asset). In addition to risks relating to the underlying assets, the use of derivatives may include other, possibly greater, risks, including counterparty, leverage and liquidity risks. Counterparty risk is the risk that the counterparty to the derivative contract will default on its obligation to pay the Fund the amount owed or otherwise perform under the derivative contract. Derivatives create leverage risk because they do not require payment up front equal to the economic exposure created by holding a position in the derivative. As a result, an adverse change in the value of the underlying asset could result in the Fund sustaining a loss that is substantially greater than the amount invested in the derivative or the anticipated value of the underlying asset, which may make the Fund’s returns more volatile and increase the risk of loss. Derivative instruments may also be less liquid than more traditional investments and the Fund may be unable to sell or close out its derivative positions at a desirable time or price. This risk may be more acute under adverse market conditions, during which the Fund may be most in need of liquidating its derivative positions. Derivatives may also be harder to value, less tax efficient and subject to changing government regulation that could impact the Fund’s ability to use certain derivatives or their cost. Derivatives strategies may not always be successful. For example, derivatives used for hedging or to gain or limit exposure to a particular market segment may not provide the expected benefits, particularly during adverse market conditions.
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| Invesco New Jersey Municipal Fund | Invesco New Jersey Municipal Fund | Valuation Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] |
Valuation Risk. The price the Fund could receive upon the sale of a portfolio investment may differ from the Fund’s valuation of the investment, particularly for investments that trade in thin or volatile markets or that are valued using a fair valuation methodology. Fixed income securities are often valued assuming orderly transactions of institutional round lot size, but a Fund may hold or transact in the same securities in smaller, odd lot sizes. Odd lots often trade at lower prices than institutional round lots. When market quotations are not readily available for Fund investments, those investments are fair valued by the Adviser. There are multiple methods that can be used to fair value a portfolio investment and such methods may involve more subjectivity than the use of market quotations. The value established for an investment through fair valuation may be different from what would be produced if the investment had been valued using market quotations. In addition, there is no assurance that the Fund could sell a portfolio investment at any time for the value ascribed to it for purposes of calculating the Fund’s net asset value, and it is possible that the Fund could incur a loss because an investment is sold at a discount to its ascribed value. The ability to value investments may also be impacted by technological issues and/or errors by pricing services or other third-party service providers.
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| Invesco New Jersey Municipal Fund | Invesco New Jersey Municipal Fund | Management Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] |
Management Risk. The Fund is actively managed and depends heavily on the Adviser's judgment about markets, interest rates or the attractiveness, relative values, liquidity, or potential appreciation of particular investments made for the Fund’s portfolio. The Fund could experience losses if these judgments prove to be incorrect. There can be no guarantee that the Adviser's investment techniques or investment decisions will produce the desired results. Additionally, legislative, regulatory, or tax developments may adversely affect management of the Fund and, therefore, the ability of the Fund to achieve its investment objective.
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| Invesco Pennsylvania Municipal Fund | Invesco Pennsylvania Municipal Fund | Risk Lose Money [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | The Fund could lose money on investments in debt securities if the issuer or borrower fails to meet its obligations to make interest payments and/or to repay principal in a timely manner. |
| Invesco Pennsylvania Municipal Fund | Invesco Pennsylvania Municipal Fund | Risk Not Insured [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | An investment in the Fund is not a deposit in a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other governmental agency. |
| Invesco Pennsylvania Municipal Fund | Invesco Pennsylvania Municipal Fund | Risk Money Market Fund Price Fluctuates [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | The values of high yield debt securities often fluctuate more in response to political, regulatory or economic developments than higher quality bonds, and their values can decline significantly over short periods of time or during periods of economic difficulty when the bonds could be difficult to value or sell at an acceptable price, thus subjecting the Fund to a substantial risk of loss. |
| Invesco Pennsylvania Municipal Fund | Invesco Pennsylvania Municipal Fund | Market Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Market Risk. The market values of the Fund’s investments, and therefore the value of the Fund’s shares, will go up and down, sometimes rapidly or unpredictably. Market risk may affect a single issuer, industry or section of the economy, or it may affect the market as a whole. The value of the Fund’s investments may go up or down due to general market conditions that are not specifically related to the particular issuer. These market conditions may include real or perceived adverse economic conditions, changes in trade regulation or economic sanctions, changes in the general outlook for revenues or corporate earnings, changes in interest or currency rates, regional or global instability and uncertainty, natural or environmental disasters, widespread disease or other public health issues, war, military conflict, acts of terrorism, economic crisis or adverse investor sentiment generally, among others. Certain changes in the U.S. economy in particular, such as when the U.S. economy weakens or when its financial markets decline, may have a material adverse effect on global financial markets as a whole, and on the securities to which the Fund has exposure. Increasingly strained relations between the U.S. and foreign countries, including as a result of economic sanctions and tariffs, may also adversely affect U.S. issuers, as well as non-U.S. issuers.
During a general downturn in the financial markets, multiple asset classes may decline in value. When markets perform well, there can be no assurance that specific investments held by the Fund will rise in value.
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| Invesco Pennsylvania Municipal Fund | Invesco Pennsylvania Municipal Fund | Debt Securities Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Debt Securities Risk. The prices of debt securities held by the Fund will be affected by changes in interest rates, the creditworthiness of the issuer and other factors. An increase in prevailing interest rates typically causes the value of existing debt securities to fall and often has a greater impact on longer-duration debt securities and higher quality debt securities. Falling interest rates will cause the Fund to reinvest the proceeds of debt securities that have been repaid by the issuer at lower interest rates. Falling interest rates may also reduce the Fund’s distributable income because interest payments on floating rate debt instruments held by the Fund will decline. The Fund could lose money on investments in debt securities if the issuer or borrower fails to meet its obligations to make interest payments and/or to repay principal in a timely manner. Changes in an issuer’s financial strength, the market’s perception of such strength or in the credit rating of the issuer or the security may affect the value of debt securities. The credit analysis applied to the Fund’s debt securities may fail to anticipate such changes, which could result in buying a debt security at an inopportune time or failing to sell a debt security in advance of a price decline or other credit event.
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| Invesco Pennsylvania Municipal Fund | Invesco Pennsylvania Municipal Fund | Municipal Securities Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Municipal Securities Risk. The risk of a municipal obligation generally depends on the financial and credit status of the issuer.
Constitutional amendments, legislative enactments, executive orders, administrative regulations, voter initiatives, and the issuer’s regional economic conditions may affect the municipal security’s value, interest payments, repayment of principal and the Fund’s ability to sell the security.
The amount of public information available about municipal securities is generally less than that for corporate equities or bonds; these limitations on access to information needed to assess the creditworthiness of a municipal security could negatively impact its liquidity.
The secondary market for certain municipal securities tends to be less well developed or liquid than many other securities markets, which may adversely affect the fund's ability to buy or sell such municipal securities at acceptable prices. Investments that are illiquid or that trade in lower volumes may be more difficult to value.
Failure of a municipal security issuer to comply with applicable tax requirements may make income paid thereon taxable, resulting in a decline in the security’s value. In addition, there could be changes in applicable tax laws or tax treatments that reduce or eliminate the current federal income tax exemption on municipal securities or otherwise adversely affect the current federal or state tax status of municipal securities.
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| Invesco Pennsylvania Municipal Fund | Invesco Pennsylvania Municipal Fund | Pennsylvania Municipal Securities Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Pennsylvania Municipal Securities Risk. The Fund is more susceptible to political, economic, regulatory or other factors affecting issuers of Pennsylvania municipal securities than a fund which does not focus its investments in such issuers. Accordingly, events in Pennsylvania may affect the Fund’s investments and performance.
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| Invesco Pennsylvania Municipal Fund | Invesco Pennsylvania Municipal Fund | Municipal Issuer Focus Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Municipal Issuer Focus Risk. The municipal issuers in which the Fund invests may be located in the same geographic area or may pay their interest obligations from revenue of similar projects, such as hospitals, airports, utility systems and housing finance agencies. This may make the Fund’s investments more susceptible to similar social, economic, political or regulatory occurrences, making the Fund more susceptible to experience a drop in its share price than if the Fund had been more diversified across issuers that did not have similar characteristics.
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| Invesco Pennsylvania Municipal Fund | Invesco Pennsylvania Municipal Fund | Investing in U.S. Territories, Commonwealths and Possessions Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Investing in U.S. Territories, Commonwealths and Possessions Risk. The Fund also invests in obligations of the governments of U.S. territories, commonwealths and possessions such as Puerto Rico, the U.S. Virgin Islands, Guam and the Northern Mariana Islands to the extent such obligations are exempt from regular federal individual and applicable state income taxes. These investments also are considered to be “Pennsylvania municipal securities” for purposes of this prospectus. Accordingly, the Fund may be adversely affected by local political, economic, social and environmental conditions and developments, including natural disasters, within these U.S. territories, commonwealths and possessions affecting the issuers of such obligations.
Certain of the municipalities in which the Fund invests, including Puerto Rico, currently experience significant financial difficulties, which may include default, insolvency or bankruptcy. As a result, securities issued by certain of these municipalities are currently considered below-investment-grade securities. A credit rating downgrade relating to, default by, or insolvency or bankruptcy of, one or several municipal security issuers of a state, territory, commonwealth or possession in which the Fund invests could affect the payment of principal and interest, the market values and marketability of many or all municipal obligations of such state, territory, commonwealth or possession.
In the past several years, securities issued by Puerto Rico and its agencies and instrumentalities have been subject to multiple credit downgrades as a result of Puerto Rico’s ongoing fiscal challenges, growing debt obligations and uncertainty about its ability to make full repayment on these obligations, and certain issuers of Puerto Rican municipal securities have filed for bankruptcy and/or failed to make payments on obligations that have come due. Such developments could adversely impact the Fund’s performance and the Fund may pay expenses to preserve its claims related to its Puerto Rican holdings. The outcome of the debt restructuring of certain Puerto Rican issuers in which the Fund invests, both within and outside bankruptcy proceedings is uncertain, and could adversely affect the Fund.
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| Invesco Pennsylvania Municipal Fund | Invesco Pennsylvania Municipal Fund | Tobacco Related Bonds Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Tobacco Related Bonds Risk. The settlement payments made by tobacco manufacturers to certain U.S. states and jurisdictions pursuant to the Master Settlement Agreement (MSA) are based on factors, including, but not limited to, annual domestic cigarette shipments, cigarette consumption, inflation and the financial capability of participating tobacco companies. Payments could be reduced if tobacco consumption decreases, if market share is lost to non-MSA manufacturers, or if there is a negative outcome in litigation regarding the MSA, including challenges by participating tobacco manufacturers regarding the amount of annual payments owed under the MSA.
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| Invesco Pennsylvania Municipal Fund | Invesco Pennsylvania Municipal Fund | Land-Secured or “Dirt” Bonds Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Land-Secured or “Dirt” Bonds Risk. These bonds, which include special assessment, special tax, and tax increment financing bonds, are issued to promote residential, commercial and industrial growth and redevelopment. They are exposed to real estate development-related risks. The bonds could default if the developments failed to progress as anticipated or if taxpayers failed to pay the assessments, fees and taxes specified in the financing plans for a project.
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| Invesco Pennsylvania Municipal Fund | Invesco Pennsylvania Municipal Fund | Municipal Lease Obligations Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Municipal Lease Obligations Risk. Municipal lease obligations are used by state and local governments to obtain funds to acquire land, equipment or facilities. The Fund can invest in certificates of participation that represent a proportionate interest in payments made under municipal lease obligations. Most municipal lease obligations, while secured by the leased property, are not general obligations of the issuing municipality. They often contain “non-appropriation” clauses under which the municipal government has no obligation to make lease or installment payments in future years unless money is appropriated on a yearly basis.
If the municipal government stops making payments or transfers its payment obligations to a private entity, the obligation could lose value or become taxable. Although the obligation may be secured by the leased equipment or facilities, the disposition of the property in the event of non-appropriation or foreclosure might prove difficult, time consuming and costly, and may result in a delay in recovering or the failure to recover the original investment. Some lease obligations may not have an active trading market, making it difficult for the Fund to sell them quickly at an acceptable price.
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| Invesco Pennsylvania Municipal Fund | Invesco Pennsylvania Municipal Fund | Tax-Exempt Commercial Paper Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Tax-Exempt Commercial Paper Risk. Tax-exempt commercial paper is a short-term obligation with a stated maturity of usually 270 days or less. It is issued by state and local governments or their agencies to finance seasonal working capital needs or as short-term financing in anticipation of longer-term financing. While tax-exempt commercial paper is intended to be repaid from general revenues or refinanced, it frequently is backed by a letter of credit, lending arrangement, note, repurchase agreement or other credit facility agreement offered by a bank or financial institution. Because tax-exempt issuers may constantly reissue their commercial paper and use the proceeds (or other sources) to repay maturing paper, the commercial paper of a tax-exempt issuer that is unable to continue to obtain liquidity in that manner may default. There may be a limited secondary market for issues of tax-exempt commercial paper.
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| Invesco Pennsylvania Municipal Fund | Invesco Pennsylvania Municipal Fund | Unrated Securities Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Unrated Securities Risk. The Adviser may internally assign ratings to securities that are not rated by any nationally recognized statistical rating organization, after assessing their credit quality and other factors, in categories similar to those of nationally recognized statistical rating organizations. There can be no assurance, nor is it intended, that the Adviser’s credit analysis process is consistent or comparable with the credit analysis process used by a nationally recognized statistical rating organization. Unrated securities are considered “investment-grade” or “below-investment-grade” if judged by the Adviser to be comparable to rated investment-grade or below-investment-grade securities. The Adviser's rating does not constitute a guarantee of the credit quality. In addition, some unrated securities may not have an active trading market or may trade less actively than rated securities, which means that unrated securities may be difficult to sell promptly at an acceptable rate and may be more difficult to value.
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| Invesco Pennsylvania Municipal Fund | Invesco Pennsylvania Municipal Fund | Medium- and Lower-Grade Municipal Securities Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Medium- and Lower-Grade Municipal Securities Risk. Medium- and lower-grade municipal securities generally involve more volatility and greater risks, including credit, market, liquidity and management risks, than higher-grade securities. Furthermore, many issuers of medium- and lower-grade securities choose not to have a rating assigned to their obligations. As such, the Fund’s portfolio may consist of a higher portion of unrated securities than an investment company investing solely in higher-grade securities. Unrated securities may not be as attractive to as many buyers as are rated securities, which may have the effect of limiting the Fund’s ability to sell such securities at an acceptable price and may make the securities more difficult to value. Investments that are illiquid or that trade in lower volumes may be more difficult to value.
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| Invesco Pennsylvania Municipal Fund | Invesco Pennsylvania Municipal Fund | High Yield Debt Securities (Junk Bond) Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | High Yield Debt Securities (Junk Bond) Risk. Compared to higher quality debt securities, high yield debt securities (also referred to as junk bonds or below-investment grade bonds) and other lower-rated securities involve a greater risk of default or price changes due to changes in the credit quality of the issuer. Compared to higher quality debt securities, high yield debt securities are more likely to be unsecured and are more likely to be subordinated to other creditors' claims. High yield debt securities are considered speculative with respect to the issuer’s capacity to pay interest and repay principal, are more susceptible to default or decline in market value and are less liquid than investment grade debt securities. Prices of high yield debt securities tend to be very volatile. The values of high yield debt securities often fluctuate more in response to political, regulatory or economic developments than higher quality bonds, and their values can decline significantly over short periods of time or during periods of economic difficulty when the bonds could be difficult to value or sell at an acceptable price, thus subjecting the Fund to a substantial risk of loss. The secondary market for below investment grade securities may not be as liquid as the secondary market for more highly rated securities, a factor which may have an adverse effect on the fund's ability to dispose of a particular high yield security. There are fewer dealers in the market for high yield securities than for investment grade securities. The prices quoted by different dealers may vary significantly, and the spread between the bid and asked price is generally much larger for high yield securities than for higher quality securities.
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| Invesco Pennsylvania Municipal Fund | Invesco Pennsylvania Municipal Fund | Inverse Floating Rate Interests Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Inverse Floating Rate Interests Risk. Inverse floating rate interests (Inverse Floaters) are issued in connection with municipal tender option bond (TOB) financing transactions to generate leverage for the Fund. Such instruments are created by a special purpose trust (a TOB Trust) that holds long-term fixed rate bonds, sold to it by the Fund (the underlying security), and issues two classes of beneficial interests: short-term floating rate interests (Floaters), which are sold to other investors, and Inverse Floaters, which are purchased by the Fund. The Floaters have first priority on the cash flow from the underlying security held by the TOB Trust, have a tender option feature that allows holders to tender the Floaters back to the TOB Trust for their par amount and accrued interest at specified intervals and bear interest at prevailing short-term interest rates. Tendered Floaters are remarketed for sale to other investors for their par amount and accrued interest by a remarketing agent to the TOB Trust and are ultimately supported by a liquidity facility provided by a bank, upon which the TOB Trust can draw funds to pay such amount to holders of Tendered Floaters that cannot be remarketed. The Fund, as holder of the Inverse Floaters, is paid the residual cash flow from the underlying security. Accordingly, the Inverse Floaters provide the Fund with leveraged exposure to the underlying security. The price of Inverse Floaters is expected to decline when interest rates rise, and generally will decline more than the price of a bond with a similar maturity, because of the effect of leverage. The price of Inverse Floaters is typically more volatile than the price of bonds with similar maturities, especially if the relevant TOB Trust provides the holder of the Inverse Floaters relatively greater leveraged exposure to the underlying security (e.g., if the par amount of the Floaters, as a percentage of the par amount of the underlying security, is relatively greater). Further, as short-term interest rates rise, the interest payable on the Floaters issued by a TOB Trust also rises, leaving less residual interest cash flow from the underlying security available for payment on the Inverse Floaters. Additionally, Inverse Floaters may lose some or all of their principal and, in some cases, the Fund could lose money in excess of its investment in Inverse Floaters. Consequently, in a rising interest rate environment, the Fund’s investments in Inverse Floaters could negatively impact the Fund’s performance and yield, especially when those Inverse Floaters provide the Fund with relatively greater leveraged exposure to the relevant underlying securities.
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| Invesco Pennsylvania Municipal Fund | Invesco Pennsylvania Municipal Fund | Variable-Rate Demand Notes Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Variable-Rate Demand Notes Risk. There may not be an active secondary market with respect to particular variable and floating rate instruments in which the Fund invests, which could make it difficult to dispose of these instruments during periods that the Fund is not entitled to exercise its demand rights or if the issuer and/or remarketing agent defaulted on its payment obligation. This could cause the Fund to suffer a loss with respect to such instruments.
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| Invesco Pennsylvania Municipal Fund | Invesco Pennsylvania Municipal Fund | Changing Fixed Income Market Conditions Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Changing Fixed Income Market Conditions Risk. Increases in the federal funds and equivalent foreign rates or other changes to monetary policy or regulatory actions may expose fixed income markets to heightened volatility, perhaps suddenly and to a significant degree, and to reduced liquidity for certain fixed income investments, particularly those with longer maturities. Such changes and resulting increased volatility may adversely impact the Fund, including its operations, universe of potential investment options, and return potential. It is difficult to predict the impact of interest rate changes on various markets. In addition, decreases in fixed income dealer market-making capacity may also potentially lead to heightened volatility and reduced liquidity in the fixed income markets. As a result, the value of the Fund’s investments and share price may decline. Changes in central bank policies and other governmental actions and political events within the U.S. and abroad may also, among other things, affect investor and consumer expectations and confidence in the financial markets, which could result in higher than normal redemptions by shareholders, which could potentially increase the Fund’s portfolio turnover rate and transaction costs.
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| Invesco Pennsylvania Municipal Fund | Invesco Pennsylvania Municipal Fund | Zero Coupon or Pay-In-Kind Securities Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Zero Coupon or Pay-In-Kind Securities Risk. The value, interest rates, and liquidity of non-cash paying instruments, such as zero coupon and pay-in-kind securities, are subject to greater fluctuation than other types of securities. The higher yields and interest rates on pay-in-kind securities reflect the payment deferral and increased credit risk associated with such instruments and that such investments may represent a higher credit risk than loans that periodically pay interest.
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| Invesco Pennsylvania Municipal Fund | Invesco Pennsylvania Municipal Fund | Borrowing and Leverage Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Borrowing and Leverage Risk. The Fund can borrow up to one-third of the value of its total assets (including the amount borrowed) from banks, as permitted by the Investment Company Act of 1940. It can use those borrowings for a number of purposes, including for purchasing securities, which can create “leverage.” In that case, changes in the value of the Fund’s investments will have a larger effect on its share price than if it did not borrow. Borrowing results in interest payments to the lenders and related expenses. Borrowing for investment purposes might reduce the Fund’s return if the yield on the securities purchased is less than those borrowing costs.
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| Invesco Pennsylvania Municipal Fund | Invesco Pennsylvania Municipal Fund | Alternative Minimum Tax Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Alternative Minimum Tax Risk. A portion of the Fund’s otherwise tax-exempt income may be taxable to those shareholders subject to the federal alternative minimum tax.
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| Invesco Pennsylvania Municipal Fund | Invesco Pennsylvania Municipal Fund | Taxability Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Taxability Risk. The Fund’s investments in municipal securities rely on the opinion of the issuer’s bond counsel that the interest paid on those securities will not be subject to federal or state income tax. Tax opinions are generally provided at the time the municipal security is initially issued. However, tax opinions are not binding on the Internal Revenue Service, state tax authorities or any court, and after the Fund buys a security, the Internal Revenue Service, state tax authorities or a court may determine that a bond issued as tax-exempt should in fact be taxable and the Fund’s dividends with respect to that bond might be subject to federal or state income tax. In addition, income from tax-exempt municipal securities could be declared taxable because of unfavorable changes in tax laws, adverse interpretations by the Internal Revenue Service, state tax authorities or a court, or the non-compliant conduct of a bond issuer.
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| Invesco Pennsylvania Municipal Fund | Invesco Pennsylvania Municipal Fund | Derivatives Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Derivatives Risk. The value of a derivative instrument depends largely on (and is derived from) the value of an underlying security, currency, commodity, interest rate, index or other asset (each referred to as an underlying asset). In addition to risks relating to the underlying assets, the use of derivatives may include other, possibly greater, risks, including counterparty, leverage and liquidity risks. Counterparty risk is the risk that the counterparty to the derivative contract will default on its obligation to pay the Fund the amount owed or otherwise perform under the derivative contract. Derivatives create leverage risk because they do not require payment up front equal to the economic exposure created by holding a position in the derivative. As a result, an adverse change in the value of the underlying asset could result in the Fund sustaining a loss that is substantially greater than the amount invested in the derivative or the anticipated value of the underlying asset, which may make the Fund’s returns more volatile and increase the risk of loss. Derivative instruments may also be less liquid than more traditional investments and the Fund may be unable to sell or close out its derivative positions at a desirable time or price. This risk may be more acute under adverse market conditions, during which the Fund may be most in need of liquidating its derivative positions. Derivatives may also be harder to value, less tax efficient and subject to changing government regulation that could impact the Fund’s ability to use certain derivatives or their cost. Derivatives strategies may not always be successful. For example, derivatives used for hedging or to gain or limit exposure to a particular market segment may not provide the expected benefits, particularly during adverse market conditions.
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| Invesco Pennsylvania Municipal Fund | Invesco Pennsylvania Municipal Fund | Valuation Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Valuation Risk. The price the Fund could receive upon the sale of a portfolio investment may differ from the Fund’s valuation of the investment, particularly for investments that trade in thin or volatile markets or that are valued using a fair valuation methodology. Fixed income securities are often valued assuming orderly transactions of institutional round lot size, but a Fund may hold or transact in the same securities in smaller, odd lot sizes. Odd lots often trade at lower prices than institutional round lots. When market quotations are not readily available for Fund investments, those investments are fair valued by the Adviser. There are multiple methods that can be used to fair value a portfolio investment and such methods may involve more subjectivity than the use of market quotations. The value established for an investment through fair valuation may be different from what would be produced if the investment had been valued using market quotations. In addition, there is no assurance that the Fund could sell a portfolio investment at any time for the value ascribed to it for purposes of calculating the Fund’s net asset value, and it is possible that the Fund could incur a loss because an investment is sold at a discount to its ascribed value. The ability to value investments may also be impacted by technological issues and/or errors by pricing services or other third-party service providers.
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| Invesco Pennsylvania Municipal Fund | Invesco Pennsylvania Municipal Fund | Management Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Management Risk. The Fund is actively managed and depends heavily on the Adviser's judgment about markets, interest rates or the attractiveness, relative values, liquidity, or potential appreciation of particular investments made for the Fund’s portfolio. The Fund could experience losses if these judgments prove to be incorrect. There can be no guarantee that the Adviser's investment techniques or investment decisions will produce the desired results. Additionally, legislative, regulatory, or tax developments may adversely affect management of the Fund and, therefore, the ability of the Fund to achieve its investment objective.
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| Invesco Rochester AMT-Free New York Municipal Fund | Invesco Rochester AMT-Free New York Municipal Fund | Risk Lose Money [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | The Fund could lose money on investments in debt securities if the issuer or borrower fails to meet its obligations to make interest payments and/or to repay principal in a timely manner. |
| Invesco Rochester AMT-Free New York Municipal Fund | Invesco Rochester AMT-Free New York Municipal Fund | Risk Not Insured [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | An investment in the Fund is not a deposit in a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other governmental agency. |
| Invesco Rochester AMT-Free New York Municipal Fund | Invesco Rochester AMT-Free New York Municipal Fund | Risk Money Market Fund Price Fluctuates [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | The values of high yield debt securities often fluctuate more in response to political, regulatory or economic developments than higher quality bonds, and their values can decline significantly over short periods of time or during periods of economic difficulty when the bonds could be difficult to value or sell at an acceptable price, thus subjecting the Fund to a substantial risk of loss. |
| Invesco Rochester AMT-Free New York Municipal Fund | Invesco Rochester AMT-Free New York Municipal Fund | Market Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Market Risk. The market values of the Fund’s investments, and therefore the value of the Fund’s shares, will go up and down, sometimes rapidly or unpredictably. Market risk may affect a single issuer, industry or section of the economy, or it may affect the market as a whole. The value of the Fund’s investments may go up or down due to general market conditions that are not specifically related to the particular issuer. These market conditions may include real or perceived adverse economic conditions, changes in trade regulation or economic sanctions, changes in the general outlook for revenues or corporate earnings, changes in interest or currency rates, regional or global instability and uncertainty, natural or environmental disasters, widespread disease or other public health issues, war, military conflict, acts of terrorism, economic crisis or adverse investor sentiment generally, among others. Certain changes in the U.S. economy in particular, such as when the U.S. economy weakens or when its financial markets decline, may have a material adverse effect on global financial markets as a whole, and on the securities to which the Fund has exposure. Increasingly strained relations between the U.S. and foreign countries, including as a result of economic sanctions and tariffs, may also adversely affect U.S. issuers, as well as non-U.S. issuers.
During a general downturn in the financial markets, multiple asset classes may decline in value. When markets perform well, there can be no assurance that specific investments held by the Fund will rise in value.
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| Invesco Rochester AMT-Free New York Municipal Fund | Invesco Rochester AMT-Free New York Municipal Fund | Debt Securities Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Debt Securities Risk. The prices of debt securities held by the Fund will be affected by changes in interest rates, the creditworthiness of the issuer and other factors. An increase in prevailing interest rates typically causes the value of existing debt securities to fall and often has a greater impact on longer-duration debt securities and higher quality debt securities. Falling interest rates will cause the Fund to reinvest the proceeds of debt securities that have been repaid by the issuer at lower interest rates. Falling interest rates may also reduce the Fund’s distributable income because interest payments on floating rate debt instruments held by the Fund will decline. The Fund could lose money on investments in debt securities if the issuer or borrower fails to meet its obligations to make interest payments and/or to repay principal in a timely manner. Changes in an issuer’s financial strength, the market’s perception of such strength or in the credit rating of the issuer or the security may affect the value of debt securities. The credit analysis applied to the Fund’s debt securities may fail to anticipate such changes, which could result in buying a debt security at an inopportune time or failing to sell a debt security in advance of a price decline or other credit event.
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| Invesco Rochester AMT-Free New York Municipal Fund | Invesco Rochester AMT-Free New York Municipal Fund | Municipal Securities Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] |
Municipal Securities Risk. The risk of a municipal obligation generally depends on the financial and credit status of the issuer. Constitutional amendments, legislative enactments, executive orders, administrative regulations, voter initiatives, and the issuer’s regional economic conditions may affect the municipal security’s value, interest payments, repayment of principal and the Fund’s ability to sell the security.
The amount of public information available about municipal securities is generally less than that for corporate equities or bonds; these limitations on access to information needed to assess the creditworthiness of a municipal security could negatively impact its liquidity.
The secondary market for certain municipal securities tends to be less well developed or liquid than many other securities markets, which may adversely affect the fund's ability to buy or sell such municipal securities at acceptable prices. Investments that are illiquid or that trade in lower volumes may be more difficult to value.
Failure of a municipal security issuer to comply with applicable tax requirements may make income paid thereon taxable, resulting in a decline in the security’s value. In addition, there could be changes in applicable tax laws or tax treatments that reduce or eliminate the current federal income tax exemption on municipal securities or otherwise adversely affect the current federal or state tax status of municipal securities.
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| Invesco Rochester AMT-Free New York Municipal Fund | Invesco Rochester AMT-Free New York Municipal Fund | New York Municipal Securities Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | New York Municipal Securities Risk. The Fund is more susceptible to political, economic, regulatory or other factors affecting issuers of New York municipal securities than a fund which does not focus its investments in such issuers. Accordingly, events in New York may affect the Fund’s investments and performance.
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| Invesco Rochester AMT-Free New York Municipal Fund | Invesco Rochester AMT-Free New York Municipal Fund | Municipal Issuer Focus Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Municipal Issuer Focus Risk. The municipal issuers in which the Fund invests may be located in the same geographic area or may pay their interest obligations from revenue of similar projects, such as hospitals, airports, utility systems and housing finance agencies. This may make the Fund’s investments more susceptible to similar social, economic, political or regulatory occurrences, making the Fund more susceptible to experience a drop in its share price than if the Fund had been more diversified across issuers that did not have similar characteristics.
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| Invesco Rochester AMT-Free New York Municipal Fund | Invesco Rochester AMT-Free New York Municipal Fund | Investing in U.S. Territories, Commonwealths and Possessions Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Investing in U.S. Territories, Commonwealths and Possessions Risk. The Fund also invests in obligations of the governments of U.S. territories, commonwealths and possessions such as Puerto Rico, the U.S. Virgin Islands, Guam and the Northern Mariana Islands to the extent such obligations are exempt from regular federal individual and state income taxes. These investments also are considered to be “New York municipal securities” for purposes of this prospectus. Accordingly, the Fund may be adversely affected by local political, economic, social and environmental conditions and developments, including natural disasters, within these U.S. territories, commonwealths and possessions affecting the issuers of such obligations.
Certain of the municipalities in which the Fund invests, including Puerto Rico, currently experience significant financial difficulties, which may include default, insolvency or bankruptcy. As a result, securities issued by certain of these municipalities are currently considered below-investment-grade securities. A credit rating downgrade relating to, default by, or insolvency or bankruptcy of, one or several municipal security issuers of a state, territory, commonwealth or possession in which the Fund invests could affect the payment of principal and interest, the market values and marketability of many or all municipal obligations of such state, territory, commonwealth or possession.
In the past several years, securities issued by Puerto Rico and its agencies and instrumentalities have been subject to multiple credit downgrades as a result of Puerto Rico’s ongoing fiscal challenges, growing debt obligations and uncertainty about its ability to make full repayment on these obligations, and certain issuers of Puerto Rican municipal securities have filed for bankruptcy and/or failed to make payments on obligations that have come due. Such developments could adversely impact the Fund’s performance and the Fund may pay expenses to preserve its claims related to its Puerto Rican holdings. The outcome of the debt restructuring of certain Puerto Rican issuers in which the Fund invests, both within and outside bankruptcy proceedings is uncertain, and could adversely affect the Fund.
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| Invesco Rochester AMT-Free New York Municipal Fund | Invesco Rochester AMT-Free New York Municipal Fund | Tobacco Related Bonds Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Tobacco Related Bonds Risk. The settlement payments made by tobacco manufacturers to certain U.S. states and jurisdictions pursuant to the Master Settlement Agreement (MSA) are based on factors, including, but not limited to, annual domestic cigarette shipments, cigarette consumption, inflation and the financial capability of participating tobacco companies. Payments could be reduced if tobacco consumption decreases, if market share is lost to non-MSA manufacturers, or if there is a negative outcome in litigation regarding the MSA, including challenges by participating tobacco manufacturers regarding the amount of annual payments owed under the MSA.
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| Invesco Rochester AMT-Free New York Municipal Fund | Invesco Rochester AMT-Free New York Municipal Fund | Land-Secured or “Dirt” Bonds Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Land-Secured or “Dirt” Bonds Risk. These bonds, which include special assessment, special tax, and tax increment financing bonds, are issued to promote residential, commercial and industrial growth and redevelopment. They are exposed to real estate development-related risks. The bonds could default if the developments failed to progress as anticipated or if taxpayers failed to pay the assessments, fees and taxes specified in the financing plans for a project.
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| Invesco Rochester AMT-Free New York Municipal Fund | Invesco Rochester AMT-Free New York Municipal Fund | Municipal Lease Obligations Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Municipal Lease Obligations Risk. Municipal lease obligations are used by state and local governments to obtain funds to acquire land, equipment or facilities. The Fund can invest in certificates of participation that represent a proportionate interest in payments made under municipal lease obligations. Most municipal lease obligations, while secured by the leased property, are not general obligations of the issuing municipality. They often contain “non-appropriation” clauses under which the municipal government has no obligation to make lease or installment payments in future years unless money is appropriated on a yearly basis.
If the municipal government stops making payments or transfers its payment obligations to a private entity, the obligation could lose value or become taxable. Although the obligation may be secured by the leased equipment or facilities, the disposition of the property in the event of non-appropriation or foreclosure might prove difficult, time consuming and costly, and may result in a delay in recovering or the failure to recover the original investment. Some lease obligations may not have an active trading market, making it difficult for the Fund to sell them quickly at an acceptable price.
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| Invesco Rochester AMT-Free New York Municipal Fund | Invesco Rochester AMT-Free New York Municipal Fund | Tax-Exempt Commercial Paper Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Tax-Exempt Commercial Paper Risk. Tax-exempt commercial paper is a short-term obligation with a stated maturity of usually 270 days or less. It is issued by state and local governments or their agencies to finance seasonal working capital needs or as short-term financing in anticipation of longer-term financing. While tax-exempt commercial paper is intended to be repaid from general revenues or refinanced, it frequently is backed by a letter of credit, lending arrangement, note, repurchase agreement or other credit facility agreement offered by a bank or financial institution. Because tax-exempt issuers may constantly reissue their commercial paper and use the proceeds (or other sources) to repay maturing paper, the commercial paper of a tax-exempt issuer that is unable to continue to obtain liquidity in that manner may default. There may be a limited secondary market for issues of tax-exempt commercial paper.
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| Invesco Rochester AMT-Free New York Municipal Fund | Invesco Rochester AMT-Free New York Municipal Fund | Unrated Securities Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Unrated Securities Risk. The Adviser may internally assign ratings to securities that are not rated by any nationally recognized statistical rating organization, after assessing their credit quality and other factors, in categories similar to those of nationally recognized statistical rating organizations. There can be no assurance, nor is it intended, that the Adviser’s credit analysis process is consistent or comparable with the credit analysis process used by a nationally recognized statistical rating organization. Unrated securities are considered “investment-grade” or “below-investment-grade” if judged by the Adviser to be comparable to rated investment-grade or below-investment-grade securities. The Adviser's rating does not constitute a guarantee of the credit quality. In addition, some unrated securities may not have an active trading market or may trade less actively than rated securities, which means that unrated securities may be difficult to sell promptly at an acceptable rate and may be more difficult to value.
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| Invesco Rochester AMT-Free New York Municipal Fund | Invesco Rochester AMT-Free New York Municipal Fund | Medium- and Lower-Grade Municipal Securities Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Medium- and Lower-Grade Municipal Securities Risk. Medium- and lower-grade municipal securities generally involve more volatility and greater risks, including credit, market, liquidity and management risks, than higher-grade securities. Furthermore, many issuers of medium- and lower-grade securities choose not to have a rating assigned to their obligations. As such, the Fund’s portfolio may consist of a higher portion of unrated securities than an investment company investing solely in higher-grade securities. Unrated securities may not be as attractive to as many buyers as are rated securities, which may have the effect of limiting the Fund’s ability to sell such securities at an acceptable price and may make the securities more difficult to value. Investments that are illiquid or that trade in lower volumes may be more difficult to value.
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| Invesco Rochester AMT-Free New York Municipal Fund | Invesco Rochester AMT-Free New York Municipal Fund | High Yield Debt Securities (Junk Bond) Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | High Yield Debt Securities (Junk Bond) Risk. Compared to higher quality debt securities, high yield debt securities (also referred to as junk bonds or below-investment grade bonds) and other lower-rated securities involve a greater risk of default or price changes due to changes in the credit quality of the issuer. Compared to higher quality debt securities, high yield debt securities are more likely to be unsecured and are more likely to be subordinated to other creditors' claims. High yield debt securities are considered speculative with respect to the issuer’s capacity to pay interest and repay principal, are more susceptible to default or decline in market value and are less liquid than investment grade debt securities. Prices of high yield debt securities tend to be very volatile. The values of high yield debt securities often fluctuate more in response to political, regulatory or economic developments than higher quality bonds, and their values can decline significantly over short periods of time or during periods of economic difficulty when the bonds could be difficult to value or sell at an acceptable price, thus subjecting the Fund to a substantial risk of loss. The secondary market for below investment grade securities may not be as liquid as the secondary market for more highly rated securities, a factor which may have an adverse effect on the fund's ability to dispose of a particular high yield security. There are fewer dealers in the market for high yield securities than for investment grade securities. The prices quoted by different dealers may vary significantly, and the spread between the bid and asked price is generally much larger for high yield securities than for higher quality securities.
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| Invesco Rochester AMT-Free New York Municipal Fund | Invesco Rochester AMT-Free New York Municipal Fund | Inverse Floating Rate Interests Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Inverse Floating Rate Interests Risk. Inverse floating rate interests (Inverse Floaters) are issued in connection with municipal tender option bond (TOB) financing transactions to generate leverage for the Fund. Such instruments are created by a special purpose trust (a TOB Trust) that holds long-term fixed rate bonds, sold to it by the Fund (the underlying security), and issues two classes of beneficial interests: short-term floating rate interests (Floaters), which are sold to other investors, and Inverse Floaters, which are purchased by the Fund. The Floaters have first priority on the cash flow from the underlying security held by the TOB Trust, have a tender option feature that allows holders to tender the Floaters back to the TOB Trust for their par amount and accrued interest at specified intervals and bear interest at prevailing short-term interest rates. Tendered Floaters are remarketed for sale to other investors for their par amount and accrued interest by a remarketing agent to the TOB Trust and are ultimately supported by a liquidity facility provided by a bank, upon which the TOB Trust can draw funds to pay such amount to holders of Tendered Floaters that cannot be remarketed. The Fund, as holder of the Inverse Floaters, is paid the residual cash flow from the underlying security. Accordingly, the Inverse Floaters provide the Fund with leveraged exposure to the underlying security. The price of Inverse Floaters is expected to decline when interest rates rise, and generally will decline more than the price of a bond with a similar maturity, because of the effect of leverage. The price of Inverse Floaters is typically more volatile than the price of bonds with similar maturities, especially if the relevant TOB Trust provides the holder of the Inverse Floaters relatively greater leveraged exposure to the underlying security (e.g., if the par amount of the Floaters, as a percentage of the par amount of the underlying security, is relatively greater). Further, as short-term interest rates rise, the interest payable on the Floaters issued by a TOB Trust also rises, leaving less residual interest cash flow from the underlying security available for payment on the Inverse Floaters. Additionally, Inverse Floaters may lose some or all of their principal and, in some cases, the Fund could lose money in excess of its investment in Inverse Floaters. Consequently, in a rising interest rate environment, the Fund’s investments in Inverse Floaters could negatively impact the Fund’s performance and yield, especially when those Inverse Floaters provide the Fund with relatively greater leveraged exposure to the relevant underlying securities.
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| Invesco Rochester AMT-Free New York Municipal Fund | Invesco Rochester AMT-Free New York Municipal Fund | Changing Fixed Income Market Conditions Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Changing Fixed Income Market Conditions Risk. Increases in the federal funds and equivalent foreign rates or other changes to monetary policy or regulatory actions may expose fixed income markets to heightened volatility, perhaps suddenly and to a significant degree, and to reduced liquidity for certain fixed income investments, particularly those with longer maturities. Such changes and resulting increased volatility may adversely impact the Fund, including its operations, universe of potential investment options, and return potential. It is difficult to predict the impact of interest rate changes on various markets. In addition, decreases in fixed income dealer market-making capacity may also potentially lead to heightened volatility and reduced liquidity in the fixed income markets. As a result, the value of the Fund’s investments and share price may decline. Changes in central bank policies and other governmental actions and political events within the U.S. and abroad may also, among other things, affect investor and consumer expectations and confidence in the financial markets, which could result in higher than normal redemptions by shareholders, which could potentially increase the Fund’s portfolio turnover rate and transaction costs.
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| Invesco Rochester AMT-Free New York Municipal Fund | Invesco Rochester AMT-Free New York Municipal Fund | Rule 144A Securities and Other Exempt Securities Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Rule 144A Securities and Other Exempt Securities Risk. The market for Rule 144A and other securities exempt from certain registration requirements may be less active than the market for publicly-traded securities. Rule 144A and other exempt securities, while initially privately placed, carry the risk that their liquidity may become impaired and the Fund may be unable to dispose of the securities at a desirable time or price.
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| Invesco Rochester AMT-Free New York Municipal Fund | Invesco Rochester AMT-Free New York Municipal Fund | Zero Coupon or Pay-In-Kind Securities Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Zero Coupon or Pay-In-Kind Securities Risk. The value, interest rates, and liquidity of non-cash paying instruments, such as zero coupon and pay-in-kind securities, are subject to greater fluctuation than other types of securities. The higher yields and interest rates on pay-in-kind securities reflect the payment deferral and increased credit risk associated with such instruments and that such investments may represent a higher credit risk than loans that periodically pay interest.
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| Invesco Rochester AMT-Free New York Municipal Fund | Invesco Rochester AMT-Free New York Municipal Fund | Reverse Repurchase Agreement Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Reverse Repurchase Agreement Risk. Reverse repurchase agreements involve the risk that the market value of securities to be repurchased may decline below the repurchase price resulting in a requirement for the Fund to deliver margin to the other party in the amount of the related shortfall. If the other party defaults on its obligation, the Fund may be delayed or prevented from completing the transaction. In the event the buyer of securities under a reverse repurchase agreement files for bankruptcy or becomes insolvent, the Fund’s use of the proceeds from the sale of the securities may be restricted. When the Fund engages in reverse repurchase agreements, changes in the value of the Fund’s investments will have a larger effect on its share price than if it did not engage in these transactions due to the effect of leverage, which will make the Fund’s returns more volatile and increase the risk of loss. Additionally, interest expenses related to reverse repurchase agreements could exceed the rate of return on investments held by the Fund, thereby reducing returns to shareholders.
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| Invesco Rochester AMT-Free New York Municipal Fund | Invesco Rochester AMT-Free New York Municipal Fund | Borrowing and Leverage Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Borrowing and Leverage Risk. The Fund can borrow up to one-third of the value of its total assets (including the amount borrowed) from banks, as permitted by the Investment Company Act of 1940. It can use those borrowings for a number of purposes, including for purchasing securities, which can create “leverage.” In that case, changes in the value of the Fund’s investments will have a larger effect on its share price than if it did not borrow. Borrowing results in interest payments to the lenders and related expenses. Borrowing for investment purposes might reduce the Fund’s return if the yield on the securities purchased is less than those borrowing costs.
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| Invesco Rochester AMT-Free New York Municipal Fund | Invesco Rochester AMT-Free New York Municipal Fund | Taxability Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Taxability Risk. The Fund’s investments in municipal securities rely on the opinion of the issuer’s bond counsel that the interest paid on those securities will not be subject to federal or state income tax. Tax opinions are generally provided at the time the municipal security is initially issued. However, tax opinions are not binding on the Internal Revenue Service, state tax authorities or any court, and after the Fund buys a security, the Internal Revenue Service, state tax authorities or a court may determine that a bond issued as tax-exempt should in fact be taxable and the Fund’s dividends with respect to that bond might be subject to federal or state income tax. In addition, income from tax-exempt municipal securities could be declared taxable because of unfavorable changes in tax laws, adverse interpretations by the Internal Revenue Service, state tax authorities or a court, or the non-compliant conduct of a bond issuer.
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| Invesco Rochester AMT-Free New York Municipal Fund | Invesco Rochester AMT-Free New York Municipal Fund | Derivatives Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Derivatives Risk. The value of a derivative instrument depends largely on (and is derived from) the value of an underlying security, currency, commodity, interest rate, index or other asset (each referred to as an underlying asset). In addition to risks relating to the underlying assets, the use of derivatives may include other, possibly greater, risks, including counterparty, leverage and liquidity risks. Counterparty risk is the risk that the counterparty to the derivative contract will default on its obligation to pay the Fund the amount owed or otherwise perform under the derivative contract. Derivatives create leverage risk because they do not require payment up front equal to the economic exposure created by holding a position in the derivative. As a result, an adverse change in the value of the underlying asset could result in the Fund sustaining a loss that is substantially greater than the amount invested in the derivative or the anticipated value of the underlying asset, which may make the Fund’s returns more volatile and increase the risk of loss. Derivative instruments may also be less liquid than more traditional investments and the Fund may be unable to sell or close out its derivative positions at a desirable time or price. This risk may be more acute under adverse market conditions, during which the Fund may be most in need of liquidating its derivative positions. Derivatives may also be harder to value, less tax efficient and subject to changing government regulation that could impact the Fund’s ability to use certain derivatives or their cost. Derivatives strategies may not always be successful. For example, derivatives used for hedging or to gain or limit exposure to a particular market segment may not provide the expected benefits, particularly during adverse market conditions.
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| Invesco Rochester AMT-Free New York Municipal Fund | Invesco Rochester AMT-Free New York Municipal Fund | Valuation Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] |
Valuation Risk. The price the Fund could receive upon the sale of a portfolio investment may differ from the Fund’s valuation of the investment, particularly for investments that trade in thin or volatile markets or that are valued using a fair valuation methodology. Fixed income securities are often valued assuming orderly transactions of institutional round lot size, but a Fund may hold or transact in the same securities in smaller, odd lot sizes. Odd lots often trade at lower prices than institutional round lots. When market quotations are not readily available for Fund investments, those investments are fair valued by the Adviser. There are multiple methods that can be used to fair value a portfolio investment and such methods may involve more subjectivity than the use of market quotations. The value established for an investment through fair valuation may be different from what would be produced if the investment had been valued using market quotations. In addition, there is no assurance that the Fund could sell a portfolio investment at any time for the value ascribed to it for purposes of calculating the Fund’s net asset value, and it is possible that the Fund could incur a loss because an investment is sold at a discount to its ascribed value. The ability to value investments may also be impacted by technological issues and/or errors by pricing services or other third-party service providers.
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| Invesco Rochester AMT-Free New York Municipal Fund | Invesco Rochester AMT-Free New York Municipal Fund | Management Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Management Risk. The Fund is actively managed and depends heavily on the Adviser's judgment about markets, interest rates or the attractiveness, relative values, liquidity, or potential appreciation of particular investments made for the Fund’s portfolio. The Fund could experience losses if these judgments prove to be incorrect. There can be no guarantee that the Adviser's investment techniques or investment decisions will produce the desired results. Additionally, legislative, regulatory, or tax developments may adversely affect management of the Fund and, therefore, the ability of the Fund to achieve its investment objective.
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| Invesco Rochester Limited Term New York Municipal Fund | Invesco Rochester Limited Term New York Municipal Fund | Risk Lose Money [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | The Fund could lose money on investments in debt securities if the issuer or borrower fails to meet its obligations to make interest payments and/or to repay principal in a timely manner. |
| Invesco Rochester Limited Term New York Municipal Fund | Invesco Rochester Limited Term New York Municipal Fund | Risk Not Insured [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | An investment in the Fund is not a deposit in a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other governmental agency. |
| Invesco Rochester Limited Term New York Municipal Fund | Invesco Rochester Limited Term New York Municipal Fund | Risk Money Market Fund Price Fluctuates [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | The values of high yield debt securities often fluctuate more in response to political, regulatory or economic developments than higher quality bonds, and their values can decline significantly over short periods of time or during periods of economic difficulty when the bonds could be difficult to value or sell at an acceptable price, thus subjecting the Fund to a substantial risk of loss. |
| Invesco Rochester Limited Term New York Municipal Fund | Invesco Rochester Limited Term New York Municipal Fund | Market Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Market Risk. The market values of the Fund’s investments, and therefore the value of the Fund’s shares, will go up and down, sometimes rapidly or unpredictably. Market risk may affect a single issuer, industry or section of the economy, or it may affect the market as a whole. The value of the Fund’s investments may go up or down due to general market conditions that are not specifically related to the particular issuer. These market conditions may include real or perceived adverse economic conditions, changes in trade regulation or economic sanctions, changes in the general outlook for revenues or corporate earnings, changes in interest or currency rates, regional or global instability and uncertainty, natural or environmental disasters, widespread disease or other public health issues, war, military conflict, acts of terrorism, economic crisis or adverse investor sentiment generally, among others. Certain changes in the U.S. economy in particular, such as when the U.S. economy weakens or when its financial markets decline, may have a material adverse effect on global financial markets as a whole, and on the securities to which the Fund has exposure. Increasingly strained relations between the U.S. and foreign countries, including as a result of economic sanctions and tariffs, may also adversely affect U.S. issuers, as well as non-U.S. issuers.
During a general downturn in the financial markets, multiple asset classes may decline in value. When markets perform well, there can be no assurance that specific investments held by the Fund will rise in value.
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| Invesco Rochester Limited Term New York Municipal Fund | Invesco Rochester Limited Term New York Municipal Fund | Debt Securities Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Debt Securities Risk. The prices of debt securities held by the Fund will be affected by changes in interest rates, the creditworthiness of the issuer and other factors. An increase in prevailing interest rates typically causes the value of existing debt securities to fall and often has a greater impact on longer-duration debt securities and higher quality debt securities. Falling interest rates will cause the Fund to reinvest the proceeds of debt securities that have been repaid by the issuer at lower interest rates. Falling interest rates may also reduce the Fund’s distributable income because interest payments on floating rate debt instruments held by the Fund will decline. The Fund could lose money on investments in debt securities if the issuer or borrower fails to meet its obligations to make interest payments and/or to repay principal in a timely manner. Changes in an issuer’s financial strength, the market’s perception of such strength or in the credit rating of the issuer or the security may affect the value of debt securities. The credit analysis applied to the Fund’s debt securities may fail to anticipate such changes, which could result in buying a debt security at an inopportune time or failing to sell a debt security in advance of a price decline or other credit event.
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| Invesco Rochester Limited Term New York Municipal Fund | Invesco Rochester Limited Term New York Municipal Fund | Municipal Securities Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] |
Municipal Securities Risk. The risk of a municipal obligation generally depends on the financial and credit status of the issuer. Constitutional amendments, legislative enactments, executive orders, administrative regulations, voter initiatives, and the issuer’s regional economic conditions may affect the municipal security’s value, interest payments, repayment of principal and the Fund’s ability to sell the security.
The amount of public information available about municipal securities is generally less than that for corporate equities or bonds; these limitations on access to information needed to assess the creditworthiness of a municipal security could negatively impact its liquidity.
The secondary market for certain municipal securities tends to be less well developed or liquid than many other securities markets, which may adversely affect the fund's ability to buy or sell such municipal securities at acceptable prices. Investments that are illiquid or that trade in lower volumes may be more difficult to value.
Failure of a municipal security issuer to comply with applicable tax requirements may make income paid thereon taxable, resulting in a decline in the security’s value. In addition, there could be changes in applicable tax laws or tax treatments that reduce or eliminate the current federal income tax exemption on municipal securities or otherwise adversely affect the current federal or state tax status of municipal securities.
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| Invesco Rochester Limited Term New York Municipal Fund | Invesco Rochester Limited Term New York Municipal Fund | New York Municipal Securities Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | New York Municipal Securities Risk. The Fund is more susceptible to political, economic, regulatory or other factors affecting issuers of New York municipal securities than a fund which does not focus its investments in such issuers. Accordingly, events in New York may affect the Fund’s investments and performance.
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| Invesco Rochester Limited Term New York Municipal Fund | Invesco Rochester Limited Term New York Municipal Fund | Municipal Issuer Focus Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Municipal Issuer Focus Risk. The municipal issuers in which the Fund invests may be located in the same geographic area or may pay their interest obligations from revenue of similar projects, such as hospitals, airports, utility systems and housing finance agencies. This may make the Fund’s investments more susceptible to similar social, economic, political or regulatory occurrences, making the Fund more susceptible to experience a drop in its share price than if the Fund had been more diversified across issuers that did not have similar characteristics.
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| Invesco Rochester Limited Term New York Municipal Fund | Invesco Rochester Limited Term New York Municipal Fund | Investing in U.S. Territories, Commonwealths and Possessions Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Investing in U.S. Territories, Commonwealths and Possessions Risk. The Fund also invests in obligations of the governments of U.S. territories, commonwealths and possessions such as Puerto Rico, the U.S. Virgin Islands, Guam and the Northern Mariana Islands to the extent such obligations are exempt from regular federal individual and state income taxes. These investments also are considered to be “New York municipal securities” for purposes of this prospectus. Accordingly, the Fund may be adversely affected by local political, economic, social and environmental conditions and developments, including natural disasters, within these U.S. territories, commonwealths and possessions affecting the issuers of such obligations.
Certain of the municipalities in which the Fund invests, including Puerto Rico, currently experience significant financial difficulties, which may include default, insolvency or bankruptcy. As a result, securities issued by certain of these municipalities are currently considered below-investment-grade securities. A credit rating downgrade relating to, default by, or insolvency or bankruptcy of, one or several municipal security issuers of a state, territory, commonwealth or possession in which the Fund invests could affect the payment of principal and interest, the market values and marketability of many or all municipal obligations of such state, territory, commonwealth or possession.
In the past several years, securities issued by Puerto Rico and its agencies and instrumentalities have been subject to multiple credit downgrades as a result of Puerto Rico’s ongoing fiscal challenges, growing debt obligations and uncertainty about its ability to make full repayment on these obligations, and certain issuers of Puerto Rican municipal securities have filed for bankruptcy and/or failed to make payments on obligations that have come due. Such developments could adversely impact the Fund’s performance and the Fund may pay expenses to preserve its claims related to its Puerto Rican holdings. The outcome of the debt restructuring of certain Puerto Rican issuers in which the Fund invests, both within and outside bankruptcy proceedings is uncertain, and could adversely affect the Fund.
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| Invesco Rochester Limited Term New York Municipal Fund | Invesco Rochester Limited Term New York Municipal Fund | Shorter-Term Securities Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Shorter-Term Securities Risk. Normally, when interest rates change, the values of shorter-term debt securities change less than the values of securities with longer maturities. The Fund tries to reduce the volatility of its share prices by seeking to maintain a shorter average effective portfolio maturity. However, shorter-term securities may have lower yields than longer-term securities. Shorter-term securities are also subject to extension and reinvestment risk. The Fund is subject to extension risk when principal payments on a debt security occur at a slower rate than expected, potentially extending the average life of the security. For securities with a call date in the near future, there is the risk that an increase in interest rates could result in the issuer of that security choosing not to redeem the security as anticipated on the security’s call date. Such a decision by the issuer may effectively change a short- or intermediate-term security into a longer term security, which could have the effect of locking in a below-market interest rate on the security, increasing the security’s duration, making the security more vulnerable to interest rate risk, reducing the security’s market value and increasing the Fund’s average effective portfolio maturity. Under such circumstances, because the values of longer term securities generally fluctuate more widely in response to interest rate changes than shorter term securities, the Fund’s volatility could increase. Reinvestment risk is the risk that if interest rates fall the Fund may need to invest the proceeds of redeemed securities in securities with lower interest rates.
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| Invesco Rochester Limited Term New York Municipal Fund | Invesco Rochester Limited Term New York Municipal Fund | Tobacco Related Bonds Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Tobacco Related Bonds Risk. The settlement payments made by tobacco manufacturers to certain U.S. states and jurisdictions pursuant to the Master Settlement Agreement (MSA) are based on factors, including, but not limited to, annual domestic cigarette shipments, cigarette consumption, inflation and the financial capability of participating tobacco companies. Payments could be reduced if tobacco consumption decreases, if market share is lost to non-MSA manufacturers, or if there is a negative outcome in litigation regarding the MSA, including challenges by participating tobacco manufacturers regarding the amount of annual payments owed under the MSA.
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| Invesco Rochester Limited Term New York Municipal Fund | Invesco Rochester Limited Term New York Municipal Fund | Land-Secured or “Dirt” Bonds Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Land-Secured or “Dirt” Bonds Risk. These bonds, which include special assessment, special tax, and tax increment financing bonds, are issued to promote residential, commercial and industrial growth and redevelopment. They are exposed to real estate development-related risks. The bonds could default if the developments failed to progress as anticipated or if taxpayers failed to pay the assessments, fees and taxes specified in the financing plans for a project.
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| Invesco Rochester Limited Term New York Municipal Fund | Invesco Rochester Limited Term New York Municipal Fund | Municipal Lease Obligations Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Municipal Lease Obligations Risk. Municipal lease obligations are used by state and local governments to obtain funds to acquire land, equipment or facilities. The Fund can invest in certificates of participation that represent a proportionate interest in payments made under municipal lease obligations. Most municipal lease obligations, while secured by the leased property, are not general obligations of the issuing municipality. They often contain “non-appropriation” clauses under which the municipal government has no obligation to make lease or installment payments in future years unless money is appropriated on a yearly basis.
If the municipal government stops making payments or transfers its payment obligations to a private entity, the obligation could lose value or become taxable. Although the obligation may be secured by the leased equipment or facilities, the disposition of the property in the event of non-appropriation or foreclosure might prove difficult, time consuming and costly, and may result in a delay in recovering or the failure to recover the original investment. Some lease obligations may not have an active trading market, making it difficult for the Fund to sell them quickly at an acceptable price.
The Fund cannot invest more than 5% of its net assets in unrated or illiquid municipal leases.
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| Invesco Rochester Limited Term New York Municipal Fund | Invesco Rochester Limited Term New York Municipal Fund | Tax-Exempt Commercial Paper Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Tax-Exempt Commercial Paper Risk. Tax-exempt commercial paper is a short-term obligation with a stated maturity of usually 270 days or less. It is issued by state and local governments or their agencies to finance seasonal working capital needs or as short-term financing in anticipation of longer-term financing. While tax-exempt commercial paper is intended to be repaid from general revenues or refinanced, it frequently is backed by a letter of credit, lending arrangement, note, repurchase agreement or other credit facility agreement offered by a bank or financial institution. Because tax-exempt issuers may constantly reissue their commercial paper and use the proceeds (or other sources) to repay maturing paper, the commercial paper of a tax-exempt issuer that is unable to continue to obtain liquidity in that manner may default. There may be a limited secondary market for issues of tax-exempt commercial paper.
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| Invesco Rochester Limited Term New York Municipal Fund | Invesco Rochester Limited Term New York Municipal Fund | Unrated Securities Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Unrated Securities Risk. The Adviser may internally assign ratings to securities that are not rated by any nationally recognized statistical rating organization, after assessing their credit quality and other factors, in categories similar to those of nationally recognized statistical rating organizations. There can be no assurance, nor is it intended, that the Adviser’s credit analysis process is consistent or comparable with the credit analysis process used by a nationally recognized statistical rating organization. Unrated securities are considered “investment-grade” or “below-investment-grade” if judged by the Adviser to be comparable to rated investment-grade or below-investment-grade securities. The Adviser's rating does not constitute a guarantee of the credit quality. In addition, some unrated securities may not have an active trading market or may trade less actively than rated securities, which means that unrated securities may be difficult to sell promptly at an acceptable rate and may be more difficult to value.
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| Invesco Rochester Limited Term New York Municipal Fund | Invesco Rochester Limited Term New York Municipal Fund | Medium- and Lower-Grade Municipal Securities Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Medium- and Lower-Grade Municipal Securities Risk. Medium- and lower-grade municipal securities generally involve more volatility and greater risks, including credit, market, liquidity and management risks, than higher-grade securities. Furthermore, many issuers of medium- and lower-grade securities choose not to have a rating assigned to their obligations. As such, the Fund’s portfolio may consist of a higher portion of unrated securities than an investment company investing solely in higher-grade securities. Unrated securities may not be as attractive to as many buyers as are rated securities, which may have the effect of limiting the Fund’s ability to sell such securities at an acceptable price and may make the securities more difficult to value. Investments that are illiquid or that trade in lower volumes may be more difficult to value.
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| Invesco Rochester Limited Term New York Municipal Fund | Invesco Rochester Limited Term New York Municipal Fund | High Yield Debt Securities (Junk Bond) Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | High Yield Debt Securities (Junk Bond) Risk. Compared to higher quality debt securities, high yield debt securities (also referred to as junk bonds or below-investment grade bonds) and other lower-rated securities involve a greater risk of default or price changes due to changes in the credit quality of the issuer. Compared to higher quality debt securities, high yield debt securities are more likely to be unsecured and are more likely to be subordinated to other creditors' claims. High yield debt securities are considered speculative with respect to the issuer’s capacity to pay interest and repay principal, are more susceptible to default or decline in market value and are less liquid than investment grade debt securities. Prices of high yield debt securities tend to be very volatile. The values of high yield debt securities often fluctuate more in response to political, regulatory or economic developments than higher quality bonds, and their values can decline significantly over short periods of time or during periods of economic difficulty when the bonds could be difficult to value or sell at an acceptable price, thus subjecting the Fund to a substantial risk of loss. The secondary market for below investment grade securities may not be as liquid as the secondary market for more highly rated securities, a factor which may have an adverse effect on the fund's ability to dispose of a particular high yield security. There are fewer dealers in the market for high yield securities than for investment grade securities. The prices quoted by different dealers may vary significantly, and the spread between the bid and asked price is generally much larger for high yield securities than for higher quality securities.
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| Invesco Rochester Limited Term New York Municipal Fund | Invesco Rochester Limited Term New York Municipal Fund | Inverse Floating Rate Interests Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Inverse Floating Rate Interests Risk. Inverse floating rate interests (Inverse Floaters) are issued in connection with municipal tender option bond (TOB) financing transactions to generate leverage for the Fund. Such instruments are created by a special purpose trust (a TOB Trust) that holds long-term fixed rate bonds, sold to it by the Fund (the underlying security), and issues two classes of beneficial interests: short-term floating rate interests (Floaters), which are sold to other investors, and Inverse Floaters, which are purchased by the Fund. The Floaters have first priority on the cash flow from the underlying security held by the TOB Trust, have a tender option feature that allows holders to tender the Floaters back to the TOB Trust for their par amount and accrued interest at specified intervals and bear interest at prevailing short-term interest rates. Tendered Floaters are remarketed for sale to other investors for their par amount and accrued interest by a remarketing agent to the TOB Trust and are ultimately supported by a liquidity facility provided by a bank, upon which the TOB Trust can draw funds to pay such amount to holders of Tendered Floaters that cannot be remarketed. The Fund, as holder of the Inverse Floaters, is paid the residual cash flow from the underlying security. Accordingly, the Inverse Floaters provide the Fund with leveraged exposure to the underlying security. The price of Inverse Floaters is expected to decline when interest rates rise, and generally will decline more than the price of a bond with a similar maturity, because of the effect of leverage. The price of Inverse Floaters is typically more volatile than the price of bonds with similar maturities, especially if the relevant TOB Trust provides the holder of the Inverse Floaters relatively greater leveraged exposure to the underlying security (e.g., if the par amount of the Floaters, as a percentage of the par amount of the underlying security, is relatively greater). Further, as short-term interest rates rise, the interest payable on the Floaters issued by a TOB Trust also rises, leaving less residual interest cash flow from the underlying security available for payment on the Inverse Floaters. Additionally, Inverse Floaters may lose some or all of their principal and, in some cases, the Fund could lose money in excess of its investment in Inverse Floaters. Consequently, in a rising interest rate environment, the Fund’s investments in Inverse Floaters could negatively impact the Fund’s performance and yield, especially when those Inverse Floaters provide the Fund with relatively greater leveraged exposure to the relevant underlying securities.
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| Invesco Rochester Limited Term New York Municipal Fund | Invesco Rochester Limited Term New York Municipal Fund | Changing Fixed Income Market Conditions Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Changing Fixed Income Market Conditions Risk. Increases in the federal funds and equivalent foreign rates or other changes to monetary policy or regulatory actions may expose fixed income markets to heightened volatility, perhaps suddenly and to a significant degree, and to reduced liquidity for certain fixed income investments, particularly those with longer maturities. Such changes and resulting increased volatility may adversely impact the Fund, including its operations, universe of potential investment options, and return potential. It is difficult to predict the impact of interest rate changes on various markets. In addition, decreases in fixed income dealer market-making capacity may also potentially lead to heightened volatility and reduced liquidity in the fixed income markets. As a result, the value of the Fund’s investments and share price may decline. Changes in central bank policies and other governmental actions and political events within the U.S. and abroad may also, among other things, affect investor and consumer expectations and confidence in the financial markets, which could result in higher than normal redemptions by shareholders, which could potentially increase the Fund’s portfolio turnover rate and transaction costs.
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| Invesco Rochester Limited Term New York Municipal Fund | Invesco Rochester Limited Term New York Municipal Fund | Rule 144A Securities and Other Exempt Securities Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Rule 144A Securities and Other Exempt Securities Risk. The market for Rule 144A and other securities exempt from certain registration requirements may be less active than the market for publicly-traded securities. Rule 144A and other exempt securities, while initially privately placed, carry the risk that their liquidity may become impaired and the Fund may be unable to dispose of the securities at a desirable time or price.
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| Invesco Rochester Limited Term New York Municipal Fund | Invesco Rochester Limited Term New York Municipal Fund | Zero Coupon or Pay-In-Kind Securities Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Zero Coupon or Pay-In-Kind Securities Risk. The value, interest rates, and liquidity of non-cash paying instruments, such as zero coupon and pay-in-kind securities, are subject to greater fluctuation than other types of securities. The higher yields and interest rates on pay-in-kind securities reflect the payment deferral and increased credit risk associated with such instruments and that such investments may represent a higher credit risk than loans that periodically pay interest.
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| Invesco Rochester Limited Term New York Municipal Fund | Invesco Rochester Limited Term New York Municipal Fund | Borrowing and Leverage Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Borrowing and Leverage Risk. The Fund can borrow up to one-third of the value of its total assets (including the amount borrowed) from banks, as permitted by the Investment Company Act of 1940. It can use those borrowings for a number of purposes, including for purchasing securities, which can create “leverage.” In that case, changes in the value of the Fund’s investments will have a larger effect on its share price than if it did not borrow. Borrowing results in interest payments to the lenders and related expenses. Borrowing for investment purposes might reduce the Fund’s return if the yield on the securities purchased is less than those borrowing costs.
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| Invesco Rochester Limited Term New York Municipal Fund | Invesco Rochester Limited Term New York Municipal Fund | Alternative Minimum Tax Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Alternative Minimum Tax Risk. A portion of the Fund’s otherwise tax-exempt income may be taxable to those shareholders subject to the federal alternative minimum tax.
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| Invesco Rochester Limited Term New York Municipal Fund | Invesco Rochester Limited Term New York Municipal Fund | Taxability Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Taxability Risk. The Fund’s investments in municipal securities rely on the opinion of the issuer’s bond counsel that the interest paid on those securities will not be subject to federal or state income tax. Tax opinions are generally provided at the time the municipal security is initially issued. However, tax opinions are not binding on the Internal Revenue Service, state tax authorities or any court, and after the Fund buys a security, the Internal Revenue Service, state tax authorities or a court may determine that a bond issued as tax-exempt should in fact be taxable and the Fund’s dividends with respect to that bond might be subject to federal or state income tax. In addition, income from tax-exempt municipal securities could be declared taxable because of unfavorable changes in tax laws, adverse interpretations by the Internal Revenue Service, state tax authorities or a court, or the non-compliant conduct of a bond issuer.
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| Invesco Rochester Limited Term New York Municipal Fund | Invesco Rochester Limited Term New York Municipal Fund | Derivatives Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Derivatives Risk. The value of a derivative instrument depends largely on (and is derived from) the value of an underlying security, currency, commodity, interest rate, index or other asset (each referred to as an underlying asset). In addition to risks relating to the underlying assets, the use of derivatives may include other, possibly greater, risks, including counterparty, leverage and liquidity risks. Counterparty risk is the risk that the counterparty to the derivative contract will default on its obligation to pay the Fund the amount owed or otherwise perform under the derivative contract. Derivatives create leverage risk because they do not require payment up front equal to the economic exposure created by holding a position in the derivative. As a result, an adverse change in the value of the underlying asset could result in the Fund sustaining a loss that is substantially greater than the amount invested in the derivative or the anticipated value of the underlying asset, which may make the Fund’s returns more volatile and increase the risk of loss. Derivative instruments may also be less liquid than more traditional investments and the Fund may be unable to sell or close out its derivative positions at a desirable time or price. This risk may be more acute under adverse market conditions, during which the Fund may be most in need of liquidating its derivative positions. Derivatives may also be harder to value, less tax efficient and subject to changing government regulation that could impact the Fund’s ability to use certain derivatives or their cost. Derivatives strategies may not always be successful. For example, derivatives used for hedging or to gain or limit exposure to a particular market segment may not provide the expected benefits, particularly during adverse market conditions.
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| Invesco Rochester Limited Term New York Municipal Fund | Invesco Rochester Limited Term New York Municipal Fund | Valuation Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Valuation Risk. The price the Fund could receive upon the sale of a portfolio investment may differ from the Fund’s valuation of the investment, particularly for investments that trade in thin or volatile markets or that are valued using a fair valuation methodology. Fixed income securities are often valued assuming orderly transactions of institutional round lot size, but a Fund may hold or transact in the same securities in smaller, odd lot sizes. Odd lots often trade at lower prices than institutional round lots. When market quotations are not readily available for Fund investments, those investments are fair valued by the Adviser. There are multiple methods that can be used to fair value a portfolio investment and such methods may involve more subjectivity than the use of market quotations. The value established for an investment through fair valuation may be different from what would be produced if the investment had been valued using market quotations. In addition, there is no assurance that the Fund could sell a portfolio investment at any time for the value ascribed to it for purposes of calculating the Fund’s net asset value, and it is possible that the Fund could incur a loss because an investment is sold at a discount to its ascribed value. The ability to value investments may also be impacted by technological issues and/or errors by pricing services or other third-party service providers.
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| Invesco Rochester Limited Term New York Municipal Fund | Invesco Rochester Limited Term New York Municipal Fund | Management Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Management Risk. The Fund is actively managed and depends heavily on the Adviser's judgment about markets, interest rates or the attractiveness, relative values, liquidity, or potential appreciation of particular investments made for the Fund’s portfolio. The Fund could experience losses if these judgments prove to be incorrect. There can be no guarantee that the Adviser's investment techniques or investment decisions will produce the desired results. Additionally, legislative, regulatory, or tax developments may adversely affect management of the Fund and, therefore, the ability of the Fund to achieve its investment objective.
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| Invesco Rochester Municipal Opportunities Fund | Invesco Rochester Municipal Opportunities Fund | Risk Lose Money [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | The Fund could lose money on investments in debt securities if the issuer or borrower fails to meet its obligations to make interest payments and/or to repay principal in a timely manner. |
| Invesco Rochester Municipal Opportunities Fund | Invesco Rochester Municipal Opportunities Fund | Risk Not Insured [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | An investment in the Fund is not a deposit in a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other governmental agency. |
| Invesco Rochester Municipal Opportunities Fund | Invesco Rochester Municipal Opportunities Fund | Risk Money Market Fund Price Fluctuates [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | The values of high yield debt securities often fluctuate more in response to political, regulatory or economic developments than higher quality bonds, and their values can decline significantly over short periods of time or during periods of economic difficulty when the bonds could be difficult to value or sell at an acceptable price, thus subjecting the Fund to a substantial risk of loss. |
| Invesco Rochester Municipal Opportunities Fund | Invesco Rochester Municipal Opportunities Fund | Market Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Market Risk. The market values of the Fund’s investments, and therefore the value of the Fund’s shares, will go up and down, sometimes rapidly or unpredictably. Market risk may affect a single issuer, industry or section of the economy, or it may affect the market as a whole. The value of the Fund’s investments may go up or down due to general market conditions that are not specifically related to the particular issuer. These market conditions may include real or perceived adverse economic conditions, changes in trade regulation or economic sanctions, changes in the general outlook for revenues or corporate earnings, changes in interest or currency rates, regional or global instability and uncertainty, natural or environmental disasters, widespread disease or other public health issues, war, military conflict, acts of terrorism, economic crisis or adverse investor sentiment generally, among others. Certain changes in the U.S. economy in particular, such as when the U.S. economy weakens or when its financial markets decline, may have a material adverse effect on global financial markets as a whole, and on the securities to which the Fund has exposure. Increasingly strained relations between the U.S. and foreign countries, including as a result of economic sanctions and tariffs, may also adversely affect U.S. issuers, as well as non-U.S. issuers.
During a general downturn in the financial markets, multiple asset classes may decline in value. When markets perform well, there can be no assurance that specific investments held by the Fund will rise in value.
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| Invesco Rochester Municipal Opportunities Fund | Invesco Rochester Municipal Opportunities Fund | Debt Securities Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Debt Securities Risk. The prices of debt securities held by the Fund will be affected by changes in interest rates, the creditworthiness of the issuer and other factors. An increase in prevailing interest rates typically causes the value of existing debt securities to fall and often has a greater impact on longer-duration debt securities and higher quality debt securities. Falling interest rates will cause the Fund to reinvest the proceeds of debt securities that have been repaid by the issuer at lower interest rates. Falling interest rates may also reduce the Fund’s distributable income because interest payments on floating rate debt instruments held by the Fund will decline. The Fund could lose money on investments in debt securities if the issuer or borrower fails to meet its obligations to make interest payments and/or to repay principal in a timely manner. Changes in an issuer’s financial strength, the market’s perception of such strength or in the credit rating of the issuer or the security may affect the value of debt securities. The credit analysis applied to the Fund’s debt securities may fail to anticipate such changes, which could result in buying a debt security at an inopportune time or failing to sell a debt security in advance of a price decline or other credit event.
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| Invesco Rochester Municipal Opportunities Fund | Invesco Rochester Municipal Opportunities Fund | Municipal Securities Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] |
Municipal Securities Risk. The risk of a municipal obligation generally depends on the financial and credit status of the issuer. Constitutional amendments, legislative enactments, executive orders, administrative regulations, voter initiatives, and the issuer’s regional economic conditions may affect the municipal security’s value, interest payments, repayment of principal and the Fund’s ability to sell the security.
The amount of public information available about municipal securities is generally less than that for corporate equities or bonds; these limitations on access to information needed to assess the creditworthiness of a municipal security could negatively impact its liquidity.
The secondary market for certain municipal securities tends to be less well developed or liquid than many other securities markets, which may adversely affect the fund's ability to buy or sell such municipal securities at acceptable prices. Investments that are illiquid or that trade in lower volumes may be more difficult to value.
Failure of a municipal security issuer to comply with applicable tax requirements may make income paid thereon taxable, resulting in a decline in the security’s value. In addition, there could be changes in applicable tax laws or tax treatments that reduce or eliminate the current federal income tax exemption on municipal securities or otherwise adversely affect the current federal or state tax status of municipal securities.
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| Invesco Rochester Municipal Opportunities Fund | Invesco Rochester Municipal Opportunities Fund | Municipal Issuer Focus Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Municipal Issuer Focus Risk. The municipal issuers in which the Fund invests may be located in the same geographic area or may pay their interest obligations from revenue of similar projects, such as hospitals, airports, utility systems and housing finance agencies. This may make the Fund’s investments more susceptible to similar social, economic, political or regulatory occurrences, making the Fund more susceptible to experience a drop in its share price than if the Fund had been more diversified across issuers that did not have similar characteristics.
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| Invesco Rochester Municipal Opportunities Fund | Invesco Rochester Municipal Opportunities Fund | Investing in U.S. Territories, Commonwealths and Possessions Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Investing in U.S. Territories, Commonwealths and Possessions Risk. The Fund also invests in obligations of the governments of U.S. territories, commonwealths and possessions such as Puerto Rico, the U.S. Virgin Islands, Guam and the Northern Mariana Islands to the extent such obligations are exempt from regular federal individual and state income taxes. Accordingly, the Fund may be adversely affected by local political, economic, social and environmental conditions and developments, including natural disasters, within these U.S. territories, commonwealths and possessions affecting the issuers of such obligations. Certain of the municipalities in which the Fund invests, including Puerto Rico, currently experience significant financial difficulties, which may include default, insolvency or bankruptcy. As a result, securities issued by certain of these municipalities are currently considered below-investment-grade securities. A credit rating downgrade relating to, default by, or insolvency or bankruptcy of, one or several municipal security issuers of a state, territory, commonwealth or possession in which the Fund invests could affect the payment of principal and interest, the market values and marketability of many or all municipal obligations of such state, territory, commonwealth or possession.
In the past several years, securities issued by Puerto Rico and its agencies and instrumentalities have been subject to multiple credit downgrades as a result of Puerto Rico’s ongoing fiscal challenges, growing debt obligations and uncertainty about its ability to make full repayment on these obligations, and certain issuers of Puerto Rican municipal securities have filed for bankruptcy and/or failed to make payments on obligations that have come due. Such developments could adversely impact the Fund’s performance and the Fund may pay expenses to preserve its claims related to its Puerto Rican holdings. The outcome of the debt restructuring of certain Puerto Rican issuers in which the Fund invests, both within and outside bankruptcy proceedings is uncertain, and could adversely affect the Fund.
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| Invesco Rochester Municipal Opportunities Fund | Invesco Rochester Municipal Opportunities Fund | Tobacco Related Bonds Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Tobacco Related Bonds Risk. The settlement payments made by tobacco manufacturers to certain U.S. states and jurisdictions pursuant to the Master Settlement Agreement (MSA) are based on factors, including, but not limited to, annual domestic cigarette shipments, cigarette consumption, inflation and the financial capability of participating tobacco companies. Payments could be reduced if tobacco consumption decreases, if market share is lost to non-MSA manufacturers, or if there is a negative outcome in litigation regarding the MSA, including challenges by participating tobacco manufacturers regarding the amount of annual payments owed under the MSA.
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| Invesco Rochester Municipal Opportunities Fund | Invesco Rochester Municipal Opportunities Fund | Land-Secured or “Dirt” Bonds Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Land-Secured or “Dirt” Bonds Risk. These bonds, which include special assessment, special tax, and tax increment financing bonds, are issued to promote residential, commercial and industrial growth and redevelopment. They are exposed to real estate development-related risks. The bonds could default if the developments failed to progress as anticipated or if taxpayers failed to pay the assessments, fees and taxes specified in the financing plans for a project.
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| Invesco Rochester Municipal Opportunities Fund | Invesco Rochester Municipal Opportunities Fund | Municipal Lease Obligations Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Municipal Lease Obligations Risk. Municipal lease obligations are used by state and local governments to obtain funds to acquire land, equipment or facilities. The Fund can invest in certificates of participation that represent a proportionate interest in payments made under municipal lease obligations. Most municipal lease obligations, while secured by the leased property, are not general obligations of the issuing municipality. They often contain “non-appropriation” clauses under which the municipal government has no obligation to make lease or installment payments in future years unless money is appropriated on a yearly basis.
If the municipal government stops making payments or transfers its payment obligations to a private entity, the obligation could lose value or become taxable. Although the obligation may be secured by the leased equipment or facilities, the disposition of the property in the event of non-appropriation or foreclosure might prove difficult, time consuming and costly, and may result in a delay in recovering or the failure to recover the original investment. Some lease obligations may not have an active trading market, making it difficult for the Fund to sell them quickly at an acceptable price.
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| Invesco Rochester Municipal Opportunities Fund | Invesco Rochester Municipal Opportunities Fund | Tax-Exempt Commercial Paper Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Tax-Exempt Commercial Paper Risk. Tax-exempt commercial paper is a short-term obligation with a stated maturity of usually 270 days or less. It is issued by state and local governments or their agencies to finance seasonal working capital needs or as short-term financing in anticipation of longer-term financing. While tax-exempt commercial paper is intended to be repaid from general revenues or refinanced, it frequently is backed by a letter of credit, lending arrangement, note, repurchase agreement or other credit facility agreement offered by a bank or financial institution. Because tax-exempt issuers may constantly reissue their commercial paper and use the proceeds (or other sources) to repay maturing paper, the commercial paper of a tax-exempt issuer that is unable to continue to obtain liquidity in that manner may default. There may be a limited secondary market for issues of tax-exempt commercial paper.
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| Invesco Rochester Municipal Opportunities Fund | Invesco Rochester Municipal Opportunities Fund | Unrated Securities Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Unrated Securities Risk. The Adviser may internally assign ratings to securities that are not rated by any nationally recognized statistical rating organization, after assessing their credit quality and other factors, in categories similar to those of nationally recognized statistical rating organizations. There can be no assurance, nor is it intended, that the Adviser’s credit analysis process is consistent or comparable with the credit analysis process used by a nationally recognized statistical rating organization. Unrated securities are considered “investment-grade” or “below-investment-grade” if judged by the Adviser to be comparable to rated investment-grade or below-investment-grade securities. The Adviser's rating does not constitute a guarantee of the credit quality. In addition, some unrated securities may not have an active trading market or may trade less actively than rated securities, which means that unrated securities may be difficult to sell promptly at an acceptable rate and may be more difficult to value.
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| Invesco Rochester Municipal Opportunities Fund | Invesco Rochester Municipal Opportunities Fund | Medium- and Lower-Grade Municipal Securities Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Medium- and Lower-Grade Municipal Securities Risk. Medium- and lower-grade municipal securities generally involve more volatility and greater risks, including credit, market, liquidity and management risks, than higher-grade securities. Furthermore, many issuers of medium- and lower-grade securities choose not to have a rating assigned to their obligations. As such, the Fund’s portfolio may consist of a higher portion of unrated securities than an investment company investing solely in higher-grade securities. Unrated securities may not be as attractive to as many buyers as are rated securities, which may have the effect of limiting the Fund’s ability to sell such securities at an acceptable price and may make the securities more difficult to value. Investments that are illiquid or that trade in lower volumes may be more difficult to value.
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| Invesco Rochester Municipal Opportunities Fund | Invesco Rochester Municipal Opportunities Fund | High Yield Debt Securities (Junk Bond) Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | High Yield Debt Securities (Junk Bond) Risk. Compared to higher quality debt securities, high yield debt securities (also referred to as junk bonds or below-investment grade bonds) and other lower-rated securities involve a greater risk of default or price changes due to changes in the credit quality of the issuer. Compared to higher quality debt securities, high yield debt securities are more likely to be unsecured and are more likely to be subordinated to other creditors' claims. High yield debt securities are considered speculative with respect to the issuer’s capacity to pay interest and repay principal, are more susceptible to default or decline in market value and are less liquid than investment grade debt securities. Prices of high yield debt securities tend to be very volatile. The values of high yield debt securities often fluctuate more in response to political, regulatory or economic developments than higher quality bonds, and their values can decline significantly over short periods of time or during periods of economic difficulty when the bonds could be difficult to value or sell at an acceptable price, thus subjecting the Fund to a substantial risk of loss. The secondary market for below investment grade securities may not be as liquid as the secondary market for more highly rated securities, a factor which may have an adverse effect on the fund's ability to dispose of a particular high yield security. There are fewer dealers in the market for high yield securities than for investment grade securities. The prices quoted by different dealers may vary significantly, and the spread between the bid and asked price is generally much larger for high yield securities than for higher quality securities.
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| Invesco Rochester Municipal Opportunities Fund | Invesco Rochester Municipal Opportunities Fund | Inverse Floating Rate Interests Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Inverse Floating Rate Interests Risk. Inverse floating rate interests (Inverse Floaters) are issued in connection with municipal tender option bond (TOB) financing transactions to generate leverage for the Fund. Such instruments are created by a special purpose trust (a TOB Trust) that holds long-term fixed rate bonds, sold to it by the Fund (the underlying security), and issues two classes of beneficial interests: short-term floating rate interests (Floaters), which are sold to other investors, and Inverse Floaters, which are purchased by the Fund. The Floaters have first priority on the cash flow from the underlying security held by the TOB Trust, have a tender option feature that allows holders to tender the Floaters back to the TOB Trust for their par amount and accrued interest at specified intervals and bear interest at prevailing short-term interest rates. Tendered Floaters are remarketed for sale to other investors for their par amount and accrued interest by a remarketing agent to the TOB Trust and are ultimately supported by a liquidity facility provided by a bank, upon which the TOB Trust can draw funds to pay such amount to holders of Tendered Floaters that cannot be remarketed. The Fund, as holder of the Inverse Floaters, is paid the residual cash flow from the underlying security. Accordingly, the Inverse Floaters provide the Fund with leveraged exposure to the underlying security. The price of Inverse Floaters is expected to decline when interest rates rise, and generally will decline more than the price of a bond with a similar maturity, because of the effect of leverage. The price of Inverse Floaters is typically more volatile than the price of bonds with similar maturities, especially if the relevant TOB Trust provides the holder of the Inverse Floaters relatively greater leveraged exposure to the underlying security (e.g., if the par amount of the Floaters, as a percentage of the par amount of the underlying security, is relatively greater). Further, as short-term interest rates rise, the interest payable on the Floaters issued by a TOB Trust also rises, leaving less residual interest cash flow from the underlying security available for payment on the Inverse Floaters. Additionally, Inverse Floaters may lose some or all of their principal and, in some cases, the Fund could lose money in excess of its investment in Inverse Floaters. Consequently, in a rising interest rate environment, the Fund’s investments in Inverse Floaters could negatively impact the Fund’s performance and yield, especially when those Inverse Floaters provide the Fund with relatively greater leveraged exposure to the relevant underlying securities.
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| Invesco Rochester Municipal Opportunities Fund | Invesco Rochester Municipal Opportunities Fund | Changing Fixed Income Market Conditions Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Changing Fixed Income Market Conditions Risk. Increases in the federal funds and equivalent foreign rates or other changes to monetary policy or regulatory actions may expose fixed income markets to heightened volatility, perhaps suddenly and to a significant degree, and to reduced liquidity for certain fixed income investments, particularly those with longer maturities. Such changes and resulting increased volatility may adversely impact the Fund, including its operations, universe of potential investment options, and return potential. It is difficult to predict the impact of interest rate changes on various markets. In addition, decreases in fixed income dealer market-making capacity may also potentially lead to heightened volatility and reduced liquidity in the fixed income markets. As a result, the value of the Fund’s investments and share price may decline. Changes in central bank policies and other governmental actions and political events within the U.S. and abroad may also, among other things, affect investor and consumer expectations and confidence in the financial markets, which could result in higher than normal redemptions by shareholders, which could potentially increase the Fund’s portfolio turnover rate and transaction costs.
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| Invesco Rochester Municipal Opportunities Fund | Invesco Rochester Municipal Opportunities Fund | Rule 144A Securities and Other Exempt Securities Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Rule 144A Securities and Other Exempt Securities Risk. The market for Rule 144A and other securities exempt from certain registration requirements may be less active than the market for publicly-traded securities. Rule 144A and other exempt securities, while initially privately placed, carry the risk that their liquidity may become impaired and the Fund may be unable to dispose of the securities at a desirable time or price.
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| Invesco Rochester Municipal Opportunities Fund | Invesco Rochester Municipal Opportunities Fund | Restricted Securities Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Restricted Securities Risk. Limitations on the resale of restricted securities may have an adverse effect on their marketability, and may prevent the Fund from disposing of them promptly at reasonable prices. There can be no assurance that a trading market will exist at any time for any particular restricted security. Transaction costs may be higher for restricted securities and such securities may be difficult to value and may have significant volatility.
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| Invesco Rochester Municipal Opportunities Fund | Invesco Rochester Municipal Opportunities Fund | Zero Coupon or Pay-In-Kind Securities Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Zero Coupon or Pay-In-Kind Securities Risk. The value, interest rates, and liquidity of non-cash paying instruments, such as zero coupon and pay-in-kind securities, are subject to greater fluctuation than other types of securities. The higher yields and interest rates on pay-in-kind securities reflect the payment deferral and increased credit risk associated with such instruments and that such investments may represent a higher credit risk than loans that periodically pay interest.
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| Invesco Rochester Municipal Opportunities Fund | Invesco Rochester Municipal Opportunities Fund | Reverse Repurchase Agreement Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Reverse Repurchase Agreement Risk. Reverse repurchase agreements involve the risk that the market value of securities to be repurchased may decline below the repurchase price resulting in a requirement for the Fund to deliver margin to the other party in the amount of the related shortfall. If the other party defaults on its obligation, the Fund may be delayed or prevented from completing the transaction. In the event the buyer of securities under a reverse repurchase agreement files for bankruptcy or becomes insolvent, the Fund’s use of the proceeds from the sale of the securities may be restricted. When the Fund engages in reverse repurchase agreements, changes in the value of the Fund’s investments will have a larger effect on its share price than if it did not engage in these transactions due to the effect of leverage, which will make the Fund’s returns more volatile and increase the risk of loss. Additionally, interest expenses related to reverse repurchase agreements could exceed the rate of return on investments held by the Fund, thereby reducing returns to shareholders.
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| Invesco Rochester Municipal Opportunities Fund | Invesco Rochester Municipal Opportunities Fund | Borrowing and Leverage Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Borrowing and Leverage Risk. The Fund can borrow up to one-third of the value of its total assets (including the amount borrowed) from banks, as permitted by the Investment Company Act of 1940. It can use those borrowings for a number of purposes, including for purchasing securities, which can create “leverage.” In that case, changes in the value of the Fund’s investments will have a larger effect on its share price than if it did not borrow. Borrowing results in interest payments to the lenders and related expenses. Borrowing for investment purposes might reduce the Fund’s return if the yield on the securities purchased is less than those borrowing costs.
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| Invesco Rochester Municipal Opportunities Fund | Invesco Rochester Municipal Opportunities Fund | Alternative Minimum Tax Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Alternative Minimum Tax Risk. A portion of the Fund’s otherwise tax-exempt income may be taxable to those shareholders subject to the federal alternative minimum tax.
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| Invesco Rochester Municipal Opportunities Fund | Invesco Rochester Municipal Opportunities Fund | Distressed Debt Securities Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Distressed Debt Securities Risk. Distressed debt securities, including those issued by companies that are involved in reorganizations, financial restructurings or bankruptcy, are speculative and involve substantial risks in addition to the risks of investing in below-investment-grade debt securities.
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| Invesco Rochester Municipal Opportunities Fund | Invesco Rochester Municipal Opportunities Fund | Taxability Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Taxability Risk. The Fund’s investments in municipal securities rely on the opinion of the issuer’s bond counsel that the interest paid on those securities will not be subject to federal income tax. Tax opinions are generally provided at the time the municipal security is initially issued. However, tax opinions are not binding on the Internal Revenue Service or any court, and after the Fund buys a security, the Internal Revenue Service or a court may determine that a bond issued as tax-exempt should in fact be taxable and the Fund’s dividends with respect to that bond might be subject to federal income tax. In addition, income from tax-exempt municipal securities could be declared taxable because of unfavorable changes in tax laws, adverse interpretations by the Internal Revenue Service or a court, or the non-compliant conduct of a bond issuer.
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| Invesco Rochester Municipal Opportunities Fund | Invesco Rochester Municipal Opportunities Fund | Derivatives Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Derivatives Risk. The value of a derivative instrument depends largely on (and is derived from) the value of an underlying security, currency, commodity, interest rate, index or other asset (each referred to as an underlying asset). In addition to risks relating to the underlying assets, the use of derivatives may include other, possibly greater, risks, including counterparty, leverage and liquidity risks. Counterparty risk is the risk that the counterparty to the derivative contract will default on its obligation to pay the Fund the amount owed or otherwise perform under the derivative contract. Derivatives create leverage risk because they do not require payment up front equal to the economic exposure created by holding a position in the derivative. As a result, an adverse change in the value of the underlying asset could result in the Fund sustaining a loss that is substantially greater than the amount invested in the derivative or the anticipated value of the underlying asset, which may make the Fund’s returns more volatile and increase the risk of loss. Derivative instruments may also be less liquid than more traditional investments and the Fund may be unable to sell or close out its derivative positions at a desirable time or price. This risk may be more acute under adverse market conditions, during which the Fund may be most in need of liquidating its derivative positions. Derivatives may also be harder to value, less tax efficient and subject to changing government regulation that could impact the Fund’s ability to use certain derivatives or their cost. Derivatives strategies may not always be successful. For example, derivatives used for hedging or to gain or limit exposure to a particular market segment may not provide the expected benefits, particularly during adverse market conditions.
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| Invesco Rochester Municipal Opportunities Fund | Invesco Rochester Municipal Opportunities Fund | Defaulted Securities Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Defaulted Securities Risk. As compared with non-defaulted securities, defaulted securities pose a greater risk that principal will not be repaid. Defaulted securities and any securities received in an exchange for such securities may be subject to restrictions on resale.
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| Invesco Rochester Municipal Opportunities Fund | Invesco Rochester Municipal Opportunities Fund | Valuation Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Valuation Risk. The price the Fund could receive upon the sale of a portfolio investment may differ from the Fund’s valuation of the investment, particularly for investments that trade in thin or volatile markets or that are valued using a fair valuation methodology. Fixed income securities are often valued assuming orderly transactions of institutional round lot size, but a Fund may hold or transact in the same securities in smaller, odd lot sizes. Odd lots often trade at lower prices than institutional round lots. When market quotations are not readily available for Fund investments, those investments are fair valued by the Adviser. There are multiple methods that can be used to fair value a portfolio investment and such methods may involve more subjectivity than the use of market quotations. The value established for an investment through fair valuation may be different from what would be produced if the investment had been valued using market quotations. In addition, there is no assurance that the Fund could sell a portfolio investment at any time for the value ascribed to it for purposes of calculating the Fund’s net asset value, and it is possible that the Fund could incur a loss because an investment is sold at a discount to its ascribed value. The ability to value investments may also be impacted by technological issues and/or errors by pricing services or other third-party service providers.
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| Invesco Rochester Municipal Opportunities Fund | Invesco Rochester Municipal Opportunities Fund | Management Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Management Risk. The Fund is actively managed and depends heavily on the Adviser's judgment about markets, interest rates or the attractiveness, relative values, liquidity, or potential appreciation of particular investments made for the Fund’s portfolio. The Fund could experience losses if these judgments prove to be incorrect. There can be no guarantee that the Adviser's investment techniques or investment decisions will produce the desired results. Additionally, legislative, regulatory, or tax developments may adversely affect management of the Fund and, therefore, the ability of the Fund to achieve its investment objective.
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| Invesco Rochester New York Municipals Fund | Invesco Rochester New York Municipals Fund | Risk Lose Money [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | The Fund could lose money on investments in debt securities if the issuer or borrower fails to meet its obligations to make interest payments and/or to repay principal in a timely manner. |
| Invesco Rochester New York Municipals Fund | Invesco Rochester New York Municipals Fund | Risk Not Insured [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | An investment in the Fund is not a deposit in a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other governmental agency. |
| Invesco Rochester New York Municipals Fund | Invesco Rochester New York Municipals Fund | Risk Money Market Fund Price Fluctuates [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | The values of high yield debt securities often fluctuate more in response to political, regulatory or economic developments than higher quality bonds, and their values can decline significantly over short periods of time or during periods of economic difficulty when the bonds could be difficult to value or sell at an acceptable price, thus subjecting the Fund to a substantial risk of loss. |
| Invesco Rochester New York Municipals Fund | Invesco Rochester New York Municipals Fund | Market Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Market Risk. The market values of the Fund’s investments, and therefore the value of the Fund’s shares, will go up and down, sometimes rapidly or unpredictably. Market risk may affect a single issuer, industry or section of the economy, or it may affect the market as a whole. The value of the Fund’s investments may go up or down due to general market conditions that are not specifically related to the particular issuer. These market conditions may include real or perceived adverse economic conditions, changes in trade regulation or economic sanctions, changes in the general outlook for revenues or corporate earnings, changes in interest or currency rates, regional or global instability and uncertainty, natural or environmental disasters, widespread disease or other public health issues, war, military conflict, acts of terrorism, economic crisis or adverse investor sentiment generally, among others. Certain changes in the U.S. economy in particular, such as when the U.S. economy weakens or when its financial markets decline, may have a material adverse effect on global financial markets as a whole, and on the securities to which the Fund has exposure. Increasingly strained relations between the U.S. and foreign countries, including as a result of economic sanctions and tariffs, may also adversely affect U.S. issuers, as well as non-U.S. issuers. During a general downturn in the financial markets, multiple asset classes may decline in value. When markets perform well, there can be no assurance that specific investments held by the Fund will rise in value.
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| Invesco Rochester New York Municipals Fund | Invesco Rochester New York Municipals Fund | Debt Securities Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Debt Securities Risk. The prices of debt securities held by the Fund will be affected by changes in interest rates, the creditworthiness of the issuer and other factors. An increase in prevailing interest rates typically causes the value of existing debt securities to fall and often has a greater impact on longer-duration debt securities and higher quality debt securities. Falling interest rates will cause the Fund to reinvest the proceeds of debt securities that have been repaid by the issuer at lower interest rates. Falling interest rates may also reduce the Fund’s distributable income because interest payments on floating rate debt instruments held by the Fund will decline. The Fund could lose money on investments in debt securities if the issuer or borrower fails to meet its obligations to make interest payments and/or to repay principal in a timely manner. Changes in an issuer’s financial strength, the market’s perception of such strength or in the credit rating of the issuer or the security may affect the value of debt securities. The credit analysis applied to the Fund’s debt securities may fail to anticipate such changes, which could result in buying a debt security at an inopportune time or failing to sell a debt security in advance of a price decline or other credit event.
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| Invesco Rochester New York Municipals Fund | Invesco Rochester New York Municipals Fund | Municipal Securities Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] |
Municipal Securities Risk. The risk of a municipal obligation generally depends on the financial and credit status of the issuer. Constitutional amendments, legislative enactments, executive orders, administrative regulations, voter initiatives, and the issuer’s regional economic conditions may affect the municipal security’s value, interest payments, repayment of principal and the Fund’s ability to sell the security.
The amount of public information available about municipal securities is generally less than that for corporate equities or bonds; these limitations on access to information needed to assess the creditworthiness of a municipal security could negatively impact its liquidity.
The secondary market for certain municipal securities tends to be less well developed or liquid than many other securities markets, which may adversely affect the fund's ability to buy or sell such municipal securities at acceptable prices. Investments that are illiquid or that trade in lower volumes may be more difficult to value.
Failure of a municipal security issuer to comply with applicable tax requirements may make income paid thereon taxable, resulting in a decline in the security’s value. In addition, there could be changes in applicable tax laws or tax treatments that reduce or eliminate the current federal income tax exemption on municipal securities or otherwise adversely affect the current federal or state tax status of municipal securities.
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| Invesco Rochester New York Municipals Fund | Invesco Rochester New York Municipals Fund | New York Municipal Securities Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | New York Municipal Securities Risk. The Fund is more susceptible to political, economic, regulatory or other factors affecting issuers of New York municipal securities than a fund which does not focus its investments in such issuers. Accordingly, events in New York may affect the Fund’s investments and performance.
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| Invesco Rochester New York Municipals Fund | Invesco Rochester New York Municipals Fund | Municipal Issuer Focus Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Municipal Issuer Focus Risk. The municipal issuers in which the Fund invests may be located in the same geographic area or may pay their interest obligations from revenue of similar projects, such as hospitals, airports, utility systems and housing finance agencies. This may make the Fund’s investments more susceptible to similar social, economic, political or regulatory occurrences, making the Fund more susceptible to experience a drop in its share price than if the Fund had been more diversified across issuers that did not have similar characteristics.
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| Invesco Rochester New York Municipals Fund | Invesco Rochester New York Municipals Fund | Investing in U.S. Territories, Commonwealths and Possessions Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Investing in U.S. Territories, Commonwealths and Possessions Risk. The Fund also invests in obligations of the governments of U.S. territories, commonwealths and possessions such as Puerto Rico, the U.S. Virgin Islands, Guam and the Northern Mariana Islands to the extent such obligations are exempt from regular federal individual and state income taxes. These investments also are considered to be “New York municipal securities” for purposes of this prospectus. Accordingly, the Fund may be adversely affected by local political, economic, social and environmental conditions and developments, including natural disasters, within these U.S. territories, commonwealths and possessions affecting the issuers of such obligations.
Certain of the municipalities in which the Fund invests, including Puerto Rico, currently experience significant financial difficulties, which may include default, insolvency or bankruptcy. As a result, securities issued by certain of these municipalities are currently considered below-investment-grade securities. A credit rating downgrade relating to, default by, or insolvency or bankruptcy of, one or several municipal security issuers of a state, territory, commonwealth or possession in which the Fund invests could affect the payment of principal and interest, the market values and marketability of many or all municipal obligations of such state, territory, commonwealth or possession.
In the past several years, securities issued by Puerto Rico and its agencies and instrumentalities have been subject to multiple credit downgrades as a result of Puerto Rico’s ongoing fiscal challenges, growing debt obligations and uncertainty about its ability to make full repayment on these obligations, and certain issuers of Puerto Rican municipal securities have filed for bankruptcy and/or failed to make payments on obligations that have come due. Such developments could adversely impact the Fund’s performance and the Fund may pay expenses to preserve its claims related to its Puerto Rican holdings. The outcome of the debt restructuring of certain Puerto Rican issuers in which the Fund invests, both within and outside bankruptcy proceedings is uncertain, and could adversely affect the Fund.
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| Invesco Rochester New York Municipals Fund | Invesco Rochester New York Municipals Fund | Tobacco Related Bonds Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Tobacco Related Bonds Risk. The settlement payments made by tobacco manufacturers to certain U.S. states and jurisdictions pursuant to the Master Settlement Agreement (MSA) are based on factors, including, but not limited to, annual domestic cigarette shipments, cigarette consumption, inflation and the financial capability of participating tobacco companies. Payments could be reduced if tobacco consumption decreases, if market share is lost to non-MSA manufacturers, or if there is a negative outcome in litigation regarding the MSA, including challenges by participating tobacco manufacturers regarding the amount of annual payments owed under the MSA.
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| Invesco Rochester New York Municipals Fund | Invesco Rochester New York Municipals Fund | Land-Secured or “Dirt” Bonds Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Land-Secured or “Dirt” Bonds Risk. These bonds, which include special assessment, special tax, and tax increment financing bonds, are issued to promote residential, commercial and industrial growth and redevelopment. They are exposed to real estate development-related risks. The bonds could default if the developments failed to progress as anticipated or if taxpayers failed to pay the assessments, fees and taxes specified in the financing plans for a project.
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| Invesco Rochester New York Municipals Fund | Invesco Rochester New York Municipals Fund | Municipal Lease Obligations Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Municipal Lease Obligations Risk. Municipal lease obligations are used by state and local governments to obtain funds to acquire land, equipment or facilities. The Fund can invest in certificates of participation that represent a proportionate interest in payments made under municipal lease obligations. Most municipal lease obligations, while secured by the leased property, are not general obligations of the issuing municipality. They often contain “non-appropriation” clauses under which the municipal government has no obligation to make lease or installment payments in future years unless money is appropriated on a yearly basis.
If the municipal government stops making payments or transfers its payment obligations to a private entity, the obligation could lose value or become taxable. Although the obligation may be secured by the leased equipment or facilities, the disposition of the property in the event of non-appropriation or foreclosure might prove difficult, time consuming and costly, and may result in a delay in recovering or the failure to recover the original investment. Some lease obligations may not have an active trading market, making it difficult for the Fund to sell them quickly at an acceptable price.
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| Invesco Rochester New York Municipals Fund | Invesco Rochester New York Municipals Fund | Tax-Exempt Commercial Paper Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Tax-Exempt Commercial Paper Risk. Tax-exempt commercial paper is a short-term obligation with a stated maturity of usually 270 days or less. It is issued by state and local governments or their agencies to finance seasonal working capital needs or as short-term financing in anticipation of longer-term financing. While tax-exempt commercial paper is intended to be repaid from general revenues or refinanced, it frequently is backed by a letter of credit, lending arrangement, note, repurchase agreement or other credit facility agreement offered by a bank or financial institution. Because tax-exempt issuers may constantly reissue their commercial paper and use the proceeds (or other sources) to repay maturing paper, the commercial paper of a tax-exempt issuer that is unable to continue to obtain liquidity in that manner may default. There may be a limited secondary market for issues of tax-exempt commercial paper.
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| Invesco Rochester New York Municipals Fund | Invesco Rochester New York Municipals Fund | Unrated Securities Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Unrated Securities Risk. The Adviser may internally assign ratings to securities that are not rated by any nationally recognized statistical rating organization, after assessing their credit quality and other factors, in categories similar to those of nationally recognized statistical rating organizations. There can be no assurance, nor is it intended, that the Adviser’s credit analysis process is consistent or comparable with the credit analysis process used by a nationally recognized statistical rating organization. Unrated securities are considered “investment-grade” or “below-investment-grade” if judged by the Adviser to be comparable to rated investment-grade or below-investment-grade securities. The Adviser's rating does not constitute a guarantee of the credit quality. In addition, some unrated securities may not have an active trading market or may trade less actively than rated securities, which means that unrated securities may be difficult to sell promptly at an acceptable rate and may be more difficult to value.
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| Invesco Rochester New York Municipals Fund | Invesco Rochester New York Municipals Fund | Medium- and Lower-Grade Municipal Securities Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Medium- and Lower-Grade Municipal Securities Risk. Medium- and lower-grade municipal securities generally involve more volatility and greater risks, including credit, market, liquidity and management risks, than higher-grade securities. Furthermore, many issuers of medium- and lower-grade securities choose not to have a rating assigned to their obligations. As such, the Fund’s portfolio may consist of a higher portion of unrated securities than an investment company investing solely in higher-grade securities. Unrated securities may not be as attractive to as many buyers as are rated securities, which may have the effect of limiting the Fund’s ability to sell such securities at an acceptable price and may make the securities more difficult to value. Investments that are illiquid or that trade in lower volumes may be more difficult to value.
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| Invesco Rochester New York Municipals Fund | Invesco Rochester New York Municipals Fund | High Yield Debt Securities (Junk Bond) Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | High Yield Debt Securities (Junk Bond) Risk. Compared to higher quality debt securities, high yield debt securities (also referred to as junk bonds or below-investment grade bonds) and other lower-rated securities involve a greater risk of default or price changes due to changes in the credit quality of the issuer. Compared to higher quality debt securities, high yield debt securities are more likely to be unsecured and are more likely to be subordinated to other creditors' claims. High yield debt securities are considered speculative with respect to the issuer’s capacity to pay interest and repay principal, are more susceptible to default or decline in market value and are less liquid than investment grade debt securities. Prices of high yield debt securities tend to be very volatile. The values of high yield debt securities often fluctuate more in response to political, regulatory or economic developments than higher quality bonds, and their values can decline significantly over short periods of time or during periods of economic difficulty when the bonds could be difficult to value or sell at an acceptable price, thus subjecting the Fund to a substantial risk of loss. The secondary market for below investment grade securities may not be as liquid as the secondary market for more highly rated securities, a factor which may have an adverse effect on the fund's ability to dispose of a particular high yield security. There are fewer dealers in the market for high yield securities than for investment grade securities. The prices quoted by different dealers may vary significantly, and the spread between the bid and asked price is generally much larger for high yield securities than for higher quality securities.
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| Invesco Rochester New York Municipals Fund | Invesco Rochester New York Municipals Fund | Inverse Floating Rate Interests Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Inverse Floating Rate Interests Risk. Inverse floating rate interests (Inverse Floaters) are issued in connection with municipal tender option bond (TOB) financing transactions to generate leverage for the Fund. Such instruments are created by a special purpose trust (a TOB Trust) that holds long-term fixed rate bonds, sold to it by the Fund (the underlying security), and issues two classes of beneficial interests: short-term floating rate interests (Floaters), which are sold to other investors, and Inverse Floaters, which are purchased by the Fund. The Floaters have first priority on the cash flow from the underlying security held by the TOB Trust, have a tender option feature that allows holders to tender the Floaters back to the TOB Trust for their par amount and accrued interest at specified intervals and bear interest at prevailing short-term interest rates. Tendered Floaters are remarketed for sale to other investors for their par amount and accrued interest by a remarketing agent to the TOB Trust and are ultimately supported by a liquidity facility provided by a bank, upon which the TOB Trust can draw funds to pay such amount to holders of Tendered Floaters that cannot be remarketed. The Fund, as holder of the Inverse Floaters, is paid the residual cash flow from the underlying security. Accordingly, the Inverse Floaters provide the Fund with leveraged exposure to the underlying security. The price of Inverse Floaters is expected to decline when interest rates rise, and generally will decline more than the price of a bond with a similar maturity, because of the effect of leverage. The price of Inverse Floaters is typically more volatile than the price of bonds with similar maturities, especially if the relevant TOB Trust provides the holder of the Inverse Floaters relatively greater leveraged exposure to the underlying security (e.g., if the par amount of the Floaters, as a percentage of the par amount of the underlying security, is relatively greater). Further, as short-term interest rates rise, the interest payable on the Floaters issued by a TOB Trust also rises, leaving less residual interest cash flow from the underlying security available for payment on the Inverse Floaters. Additionally, Inverse Floaters may lose some or all of their principal and, in some cases, the Fund could lose money in excess of its investment in Inverse Floaters. Consequently, in a rising interest rate environment, the Fund’s investments in Inverse Floaters could negatively impact the Fund’s performance and yield, especially when those Inverse Floaters provide the Fund with relatively greater leveraged exposure to the relevant underlying securities.
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| Invesco Rochester New York Municipals Fund | Invesco Rochester New York Municipals Fund | Changing Fixed Income Market Conditions Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Changing Fixed Income Market Conditions Risk. Increases in the federal funds and equivalent foreign rates or other changes to monetary policy or regulatory actions may expose fixed income markets to heightened volatility, perhaps suddenly and to a significant degree, and to reduced liquidity for certain fixed income investments, particularly those with longer maturities. Such changes and resulting increased volatility may adversely impact the Fund, including its operations, universe of potential investment options, and return potential. It is difficult to predict the impact of interest rate changes on various markets. In addition, decreases in fixed income dealer market-making capacity may also potentially lead to heightened volatility and reduced liquidity in the fixed income markets. As a result, the value of the Fund’s investments and share price may decline. Changes in central bank policies and other governmental actions and political events within the U.S. and abroad may also, among other things, affect investor and consumer expectations and confidence in the financial markets, which could result in higher than normal redemptions by shareholders, which could potentially increase the Fund’s portfolio turnover rate and transaction costs.
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| Invesco Rochester New York Municipals Fund | Invesco Rochester New York Municipals Fund | Rule 144A Securities and Other Exempt Securities Risk [Member] | |
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| Risk [Text Block] | Rule 144A Securities and Other Exempt Securities Risk. The market for Rule 144A and other securities exempt from certain registration requirements may be less active than the market for publicly-traded securities. Rule 144A and other exempt securities, while initially privately placed, carry the risk that their liquidity may become impaired and the Fund may be unable to dispose of the securities at a desirable time or price.
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| Invesco Rochester New York Municipals Fund | Invesco Rochester New York Municipals Fund | Zero Coupon or Pay-In-Kind Securities Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Zero Coupon or Pay-In-Kind Securities Risk. The value, interest rates, and liquidity of non-cash paying instruments, such as zero coupon and pay-in-kind securities, are subject to greater fluctuation than other types of securities. The higher yields and interest rates on pay-in-kind securities reflect the payment deferral and increased credit risk associated with such instruments and that such investments may represent a higher credit risk than loans that periodically pay interest.
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| Invesco Rochester New York Municipals Fund | Invesco Rochester New York Municipals Fund | Reverse Repurchase Agreement Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Reverse Repurchase Agreement Risk. Reverse repurchase agreements involve the risk that the market value of securities to be repurchased may decline below the repurchase price resulting in a requirement for the Fund to deliver margin to the other party in the amount of the related shortfall. If the other party defaults on its obligation, the Fund may be delayed or prevented from completing the transaction. In the event the buyer of securities under a reverse repurchase agreement files for bankruptcy or becomes insolvent, the Fund’s use of the proceeds from the sale of the securities may be restricted. When the Fund engages in reverse repurchase agreements, changes in the value of the Fund’s investments will have a larger effect on its share price than if it did not engage in these transactions due to the effect of leverage, which will make the Fund’s returns more volatile and increase the risk of loss. Additionally, interest expenses related to reverse repurchase agreements could exceed the rate of return on investments held by the Fund, thereby reducing returns to shareholders.
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| Invesco Rochester New York Municipals Fund | Invesco Rochester New York Municipals Fund | Borrowing and Leverage Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Borrowing and Leverage Risk. The Fund can borrow up to one-third of the value of its total assets (including the amount borrowed) from banks, as permitted by the Investment Company Act of 1940. It can use those borrowings for a number of purposes, including for purchasing securities, which can create “leverage.” In that case, changes in the value of the Fund’s investments will have a larger effect on its share price than if it did not borrow. Borrowing results in interest payments to the lenders and related expenses. Borrowing for investment purposes might reduce the Fund’s return if the yield on the securities purchased is less than those borrowing costs.
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| Invesco Rochester New York Municipals Fund | Invesco Rochester New York Municipals Fund | Alternative Minimum Tax Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Alternative Minimum Tax Risk. A portion of the Fund’s otherwise tax-exempt income may be taxable to those shareholders subject to the federal alternative minimum tax.
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| Invesco Rochester New York Municipals Fund | Invesco Rochester New York Municipals Fund | Taxability Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Taxability Risk. The Fund’s investments in municipal securities rely on the opinion of the issuer’s bond counsel that the interest paid on those securities will not be subject to federal or state income tax. Tax opinions are generally provided at the time the municipal security is initially issued. However, tax opinions are not binding on the Internal Revenue Service, state tax authorities or any court, and after the Fund buys a security, the Internal Revenue Service, state tax authorities or a court may determine that a bond issued as tax-exempt should in fact be taxable and the Fund’s dividends with respect to that bond might be subject to federal or state income tax. In addition, income from tax-exempt municipal securities could be declared taxable because of unfavorable changes in tax laws, adverse interpretations by the Internal Revenue Service, state tax authorities or a court, or the non-compliant conduct of a bond issuer.
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| Invesco Rochester New York Municipals Fund | Invesco Rochester New York Municipals Fund | Derivatives Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Derivatives Risk. The value of a derivative instrument depends largely on (and is derived from) the value of an underlying security, currency, commodity, interest rate, index or other asset (each referred to as an underlying asset). In addition to risks relating to the underlying assets, the use of derivatives may include other, possibly greater, risks, including counterparty, leverage and liquidity risks. Counterparty risk is the risk that the counterparty to the derivative contract will default on its obligation to pay the Fund the amount owed or otherwise perform under the derivative contract. Derivatives create leverage risk because they do not require payment up front equal to the economic exposure created by holding a position in the derivative. As a result, an adverse change in the value of the underlying asset could result in the Fund sustaining a loss that is substantially greater than the amount invested in the derivative or the anticipated value of the underlying asset, which may make the Fund’s returns more volatile and increase the risk of loss. Derivative instruments may also be less liquid than more traditional investments and the Fund may be unable to sell or close out its derivative positions at a desirable time or price. This risk may be more acute under adverse market conditions, during which the Fund may be most in need of liquidating its derivative positions. Derivatives may also be harder to value, less tax efficient and subject to changing government regulation that could impact the Fund’s ability to use certain derivatives or their cost. Derivatives strategies may not always be successful. For example, derivatives used for hedging or to gain or limit exposure to a particular market segment may not provide the expected benefits, particularly during adverse market conditions.
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| Invesco Rochester New York Municipals Fund | Invesco Rochester New York Municipals Fund | Valuation Risk [Member] | |
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| Risk [Text Block] | Valuation Risk. The price the Fund could receive upon the sale of a portfolio investment may differ from the Fund’s valuation of the investment, particularly for investments that trade in thin or volatile markets or that are valued using a fair valuation methodology. Fixed income securities are often valued assuming orderly transactions of institutional round lot size, but a Fund may hold or transact in the same securities in smaller, odd lot sizes. Odd lots often trade at lower prices than institutional round lots. When market quotations are not readily available for Fund investments, those investments are fair valued by the Adviser. There are multiple methods that can be used to fair value a portfolio investment and such methods may involve more subjectivity than the use of market quotations. The value established for an investment through fair valuation may be different from what would be produced if the investment had been valued using market quotations. In addition, there is no assurance that the Fund could sell a portfolio investment at any time for the value ascribed to it for purposes of calculating the Fund’s net asset value, and it is possible that the Fund could incur a loss because an investment is sold at a discount to its ascribed value. The ability to value investments may also be impacted by technological issues and/or errors by pricing services or other third-party service providers.
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| Invesco Rochester New York Municipals Fund | Invesco Rochester New York Municipals Fund | Management Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Management Risk. The Fund is actively managed and depends heavily on the Adviser's judgment about markets, interest rates or the attractiveness, relative values, liquidity, or potential appreciation of particular investments made for the Fund’s portfolio. The Fund could experience losses if these judgments prove to be incorrect. There can be no guarantee that the Adviser's investment techniques or investment decisions will produce the desired results. Additionally, legislative, regulatory, or tax developments may adversely affect management of the Fund and, therefore, the ability of the Fund to achieve its investment objective.
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