v3.26.1
Label Element Value
Invesco Limited Term Municipal Income Fund | Invesco Limited Term Municipal Income Fund  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk/Return [Heading] oef_RiskReturnHeading Fund Summary
Objective [Heading] oef_ObjectiveHeading Investment Objective(s)
Objective, Primary [Text Block] oef_ObjectivePrimaryTextBlock
The Fund’s investment objective is federal tax-exempt current income.
Expense Heading [Optional Text] oef_ExpenseHeading Fees and Expenses of the Fund
Expense Narrative [Text Block] oef_ExpenseNarrativeTextBlock
This table describes the fees and expenses that you may pay if you buy, hold and sell shares of the Fund.
The table and Examples below do not reflect any transaction fees that may be charged by financial intermediaries or commissions that a shareholder may be required to pay directly to its financial intermediary when buying or selling Class Y or Class R6 shares. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $100,000 in the Invesco Funds. More information about these and other discounts is available from your financial professional and in the section “Shareholder Account Information – Initial Sales Charges (Class A Shares Only)” on page A-3 of the prospectus and the section “Purchase, Redemption and Pricing of Shares-Purchase and Redemption of Shares” on page L-1 of the statement of additional information (SAI).
Shareholder Fees Caption [Optional Text] oef_ShareholderFeesCaption Shareholder Fees (fees paid directly from your investment)
Operating Expenses Caption [Optional Text] oef_OperatingExpensesCaption Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Expenses Deferred Charges [Text Block] oef_ExpensesDeferredChargesTextBlock A contingent deferred sales charge may apply in some cases. See “Shareholder Account Information-Contingent Deferred Sales Charges (CDSCs).”
Expense Breakpoint Discounts [Text] oef_ExpenseBreakpointDiscounts You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $100,000 in the Invesco Funds.
Expense Breakpoint, Minimum Investment Required [Amount] oef_ExpenseBreakpointMinimumInvestmentRequiredAmount $ 100,000
Expense Example [Heading] oef_ExpenseExampleHeading Example.
Expense Example Narrative [Text Block] oef_ExpenseExampleNarrativeTextBlock
This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds.
The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. This Example does not include commissions and/or other forms of compensation that investors may pay on transactions in Class Y and Class R6 shares. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same.
Although your actual costs may be higher or lower, based on these assumptions, your costs would be:
Expense Example, No Redemption, By Year, Caption [Text] oef_ExpenseExampleNoRedemptionByYearCaption You would pay the following expenses if you did not redeem your shares:
Portfolio Turnover [Heading] oef_PortfolioTurnoverHeading Portfolio Turnover.
Portfolio Turnover [Text Block] oef_PortfolioTurnoverTextBlock
The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the Example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 42% of the average value of its portfolio.
Portfolio Turnover, Rate oef_PortfolioTurnoverRate 42.00%
Strategy [Heading] oef_StrategyHeading Principal Investment Strategies of the Fund
Strategy Narrative [Text Block] oef_StrategyNarrativeTextBlock
Under normal circumstances, the Fund will invest at least 80% of the value of its net assets (plus any borrowings for investment purposes) in investments the income from which is exempt from federal income tax under regular tax rules. The 80% investment policy stated in the foregoing sentence is a fundamental policy of the Fund and may not be changed without shareholder approval of a majority of the Fund’s outstanding voting securities, as defined in the Investment Company Act of 1940, as amended (1940 Act).
The Fund invests, under normal circumstances, at least 80% of its net assets (plus any borrowings for investment purposes) in municipal debt securities that (1) pay interest that is excluded from gross income for federal income tax purposes, and (2) do not produce income that will be considered to be an item of preference for purposes of the alternative minimum tax. In complying with this 80% investment policy, the Fund may invest in derivatives and other instruments that have economic characteristics similar to the Fund’s investments that are counted toward the 80% investment policy.
At least 80% of the Fund’s net assets will normally be invested in investment-grade municipal debt securities. Investment-grade securities are: (i) securities rated BBB- or higher by S&P Global Ratings (S&P) or Baa3 or higher by Moody’s Ratings (Moody’s) or an equivalent rating by another nationally recognized statistical rating organization (NRSRO), (ii) securities with comparable short-term NRSRO ratings, or (iii) unrated securities determined by Invesco Advisers, Inc. (Invesco or the Adviser) to be of comparable quality. If two or more NRSROs have assigned different ratings to a security, the Adviser uses the highest rating assigned. At the present time, the Fund will not invest in municipal debt securities if the interest on such securities is subject to the federal alternative minimum tax.
As a limited term fund, the Fund will attempt to maintain a dollar-weighted average effective portfolio maturity of five years or less. However, it can buy securities with maturities of more than five years. Because of events affecting the bond markets and interest rate changes, the maturity of the portfolio might not meet the target at all times.
For purposes of the Fund's 80% investment policies, municipal securities include debt obligations of states, territories or possessions of the United States and the District of Columbia and their political subdivisions, agencies and instrumentalities, the interest on which is exempt from federal income tax, at the time of issuance, in the opinion of bond counsel or other counsel to the issuers of such securities.
The principal types of municipal debt securities purchased by the Fund are revenue obligations and general obligations. To meet its investment objective, the Fund invests in different types of general obligation and
revenue obligation securities, including fixed and variable rate securities, municipal notes, variable rate demand notes, municipal leases, custodial receipts, and participation certificates. The Fund may also invest in other types of municipal securities. Under normal market conditions, the Fund invests primarily in municipal securities classified as revenue bonds.
Up to 20% of the Fund’s net assets may be invested in municipal debt securities that are determined to be below-investment-grade quality. This restriction is applied at the time of purchase and the Fund may continue to hold a security whose credit rating has been downgraded or, in the case of an unrated security, after the Fund’s adviser, Invesco Advisers, Inc. (Invesco or the Adviser) has changed its assessment of the security’s credit quality. As a result, credit rating downgrades or other market fluctuations may cause the Fund’s holdings of below-investment-grade securities to exceed, at times significantly, this restriction for an extended period of time. These types of securities are commonly referred to as junk bonds. With respect to such investments, the Fund has not established any limit on the percentage of its portfolio that may be invested in securities in any one rating category.
The Fund may invest more than 25% of its net assets in a segment of the municipal securities market with similar characteristics if the Adviser determines that the yields available from obligations in a particular segment justify the additional risks of a larger investment in such segment. The Fund may not, however, invest more than 25% of its net assets in industrial development revenue bonds issued for companies in the same industry.
The Fund may invest in illiquid or thinly traded investments. The Fund may also invest in securities that are subject to resale restrictions and/or exempt from registration under the Securities Act of 1933, as amended (Securities Act), such as those contained in Rule 144A promulgated under the Securities Act. The Fund’s investments may include securities that do not produce immediate cash income, such as zero coupon securities and payment-in-kind securities.
The Fund may purchase and sell securities on a when-issued and delayed delivery basis, which means that the Fund may buy or sell a security with payment and delivery taking place in the future.
The Fund can invest in inverse floating rate interests (Inverse Floaters) issued in connection with municipal tender option bond (TOB) financing transactions to generate leverage for the Fund. The Fund’s investments in Inverse Floaters are included for purposes of the 80% policy described above.
The Fund can invest in derivative instruments including futures contracts and swap contracts.
The Fund can use futures contracts, including interest rate futures, to reduce exposure to interest rate changes and to manage duration.
The Fund can use swap contracts, including interest rate swaps, to seek to hedge its exposure to interest rates.
Derivatives and other instruments that provide investment exposure to the investments subject to the 80% investment policies and derivatives that provide investment exposure to one or more market risk factors associated with such investments may be included in the Fund's 80% investment policies.
The Fund can borrow money for investment-related purposes including to purchase additional securities, which is another form of leverage. The Fund may also borrow to meet redemption obligations or for temporary and emergency purposes. Although the amount of borrowing will vary from time to time, the amount of leveraging from borrowings will not exceed one-third of the Fund’s total assets.
The Adviser actively manages the Fund’s portfolio and adjusts the average maturity of portfolio investments based upon its expectations regarding the direction of interest rates and other economic factors. The Adviser seeks to identify those securities that it believes entail reasonable credit risk considered in relation to the Fund’s investment policies. In selecting securities for investment, the Adviser uses its extensive research capabilities to assess potential investments and considers a number of factors, including general market and economic conditions and interest rate,
credit and prepayment risks. Each security considered for investment is subjected to an in-depth credit analysis to evaluate the level of risk it presents.
The Fund can invest up to 25% of its total assets in tobacco settlement revenue bonds, which make payments only from a state’s interest in the Master Settlement Agreement (MSA), and up to 25% of its total assets in tobacco bonds subject to a state’s appropriation pledge, which make payments from both MSA revenue and a state’s appropriation pledge.
Decisions to purchase or sell securities are determined by the relative value considerations of the portfolio managers that factor in economic and credit-related fundamentals, market supply and demand, market dislocations and situation-specific opportunities. The purchase or sale of securities may be related to a decision to alter the Fund’s macro risk exposure (such as duration, yield curve positioning and sector exposure), a need to limit or reduce the Fund’s exposure to a particular security or issuer, degradation of an issuer’s credit quality, or general liquidity needs of the Fund. The potential for realization of capital gains or losses resulting from possible changes in interest rates will not be a major consideration and frequency of portfolio turnover generally will not be a limiting factor if the Adviser considers it advantageous to purchase or sell securities.
Bar Chart and Performance Table [Heading] oef_BarChartAndPerformanceTableHeading Performance Information
Performance Narrative [Text Block] oef_PerformanceNarrativeTextBlock
The bar chart and performance table provide an indication of the risks of investing in the Fund. The bar chart shows changes in the performance of the Fund from year to year as of December 31. The performance table compares the Fund’s performance to that of a broad measure of market performance and one or more additional indices with characteristics relevant to the Fund. The Fund's past performance (before and after taxes) is not necessarily an indication of its future performance.
Fund performance reflects any applicable fee waivers and expense reimbursements. Performance returns would be lower without applicable fee waivers and expense reimbursements.
All Fund performance shown assumes the reinvestment of dividends and capital gains and the effect of the Fund’s expenses.
Updated performance information is available on the Fund's website at www.invesco.com/us.
Performance Information Illustrates Variability of Returns [Text] oef_PerformanceInformationIllustratesVariabilityOfReturns The bar chart and performance table provide an indication of the risks of investing in the Fund. The bar chart shows changes in the performance of the Fund from year to year as of December 31. The performance table compares the Fund’s performance to that of a broad measure of market performance and one or more additional indices with characteristics relevant to the Fund.
Performance Availability Website Address [Text] oef_PerformanceAvailabilityWebSiteAddress www.invesco.com/us
Performance Past Does Not Indicate Future [Text] oef_PerformancePastDoesNotIndicateFuture The Fund's past performance (before and after taxes) is not necessarily an indication of its future performance.
Bar Chart [Heading] oef_BarChartHeading Annual Total Returns
Bar Chart Narrative [Text Block] oef_BarChartNarrativeTextBlock
The bar chart does not reflect sales loads. If it did, the annual total returns shown would be lower.
Bar Chart Does Not Reflect Sales Loads [Text] oef_BarChartDoesNotReflectSalesLoads The bar chart does not reflect sales loads. If it did, the annual total returns shown would be lower.
Bar Chart Closing [Text Block] oef_BarChartClosingTextBlock
Class A2
Period Ended
Returns
Year-to-date
March 31, 2026
0.36%
Best Quarter
December 31, 2023
3.98%
Worst Quarter
March 31, 2022
-2.71%
Year to Date Return, Label [Optional Text] oef_YearToDateReturnLabel Year-to-date
Bar Chart, Year to Date Return, Date oef_BarChartYearToDateReturnDate Mar. 31, 2026
Bar Chart, Year to Date Return oef_BarChartYearToDateReturn 0.36%
Highest Quarterly Return, Label [Optional Text] oef_HighestQuarterlyReturnLabel Best Quarter
Highest Quarterly Return, Date oef_BarChartHighestQuarterlyReturnDate Dec. 31, 2023
Highest Quarterly Return oef_BarChartHighestQuarterlyReturn 3.98%
Lowest Quarterly Return, Label [Optional Text] oef_LowestQuarterlyReturnLabel Worst Quarter
Lowest Quarterly Return, Date oef_BarChartLowestQuarterlyReturnDate Mar. 31, 2022
Lowest Quarterly Return oef_BarChartLowestQuarterlyReturn (2.71%)
Performance Table Heading oef_PerformanceTableHeading Average Annual Total Returns (for the periods ended December 31, 2025) 
Index No Deduction for Fees, Expenses, or Taxes [Text] oef_IndexNoDeductionForFeesExpensesTaxes (reflects no deduction for fees, expenses or taxes)
Performance Table Uses Highest Federal Rate oef_PerformanceTableUsesHighestFederalRate After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes.
Performance Table Not Relevant to Tax Deferred oef_PerformanceTableNotRelevantToTaxDeferred Actual after-tax returns depend on an investor's tax situation and may differ from those shown, and after-tax returns shown are not relevant to investors who hold their Fund shares through tax-advantaged arrangements, such as 401(k) plans, 529 college savings plans or individual retirement accounts.
Performance Table One Class of after Tax Shown [Text] oef_PerformanceTableOneClassOfAfterTaxShown After-tax returns are shown for Class A2 shares only and after-tax returns for other classes will vary.
Performance Table Closing [Text Block] oef_PerformanceTableClosingTextBlock
After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor's tax situation and may differ from those shown, and after-tax returns shown are not relevant to investors who hold their Fund shares through tax-advantaged arrangements, such as 401(k) plans, 529 college savings plans or individual retirement accounts. After-tax returns are shown for Class A2 shares only and after-tax returns for other classes will vary.
Invesco Limited Term Municipal Income Fund | Invesco Limited Term Municipal Income Fund | Risk Lose Money [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock 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] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock 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] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock 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] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock
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.
Invesco Limited Term Municipal Income Fund | Invesco Limited Term Municipal Income Fund | Debt Securities Risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock
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.
Invesco Limited Term Municipal Income Fund | Invesco Limited Term Municipal Income Fund | Municipal Securities Risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock
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.
Invesco Limited Term Municipal Income Fund | Invesco Limited Term Municipal Income Fund | Unrated Securities Risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock
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.
Invesco Limited Term Municipal Income Fund | Invesco Limited Term Municipal Income Fund | Medium- and Lower-Grade Municipal Securities Risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock
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.
Invesco Limited Term Municipal Income Fund | Invesco Limited Term Municipal Income Fund | High Yield Debt Securities (Junk Bond) Risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock
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.
Invesco Limited Term Municipal Income Fund | Invesco Limited Term Municipal Income Fund | Municipal Issuer Focus Risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock
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.
Invesco Limited Term Municipal Income Fund | Invesco Limited Term Municipal Income Fund | Changing Fixed Income Market Conditions Risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock
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.
Invesco Limited Term Municipal Income Fund | Invesco Limited Term Municipal Income Fund | Rule 144A Securities and Other Exempt Securities Risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock
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.
Invesco Limited Term Municipal Income Fund | Invesco Limited Term Municipal Income Fund | Zero Coupon or Pay-In-Kind Securities Risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock
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.
Invesco Limited Term Municipal Income Fund | Invesco Limited Term Municipal Income Fund | When-Issued, Delayed Delivery and Forward Commitment Risks [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock
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.
Invesco Limited Term Municipal Income Fund | Invesco Limited Term Municipal Income Fund | Inverse Floating Rate Interests Risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock
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.
Invesco Limited Term Municipal Income Fund | Invesco Limited Term Municipal Income Fund | Borrowing and Leverage Risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock
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.
Invesco Limited Term Municipal Income Fund | Invesco Limited Term Municipal Income Fund | Taxability Risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock
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.
Invesco Limited Term Municipal Income Fund | Invesco Limited Term Municipal Income Fund | Variable-Rate Demand Notes Risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock
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.
Invesco Limited Term Municipal Income Fund | Invesco Limited Term Municipal Income Fund | Tobacco Related Bonds Risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock
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.
Invesco Limited Term Municipal Income Fund | Invesco Limited Term Municipal Income Fund | Derivatives Risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock
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.
Invesco Limited Term Municipal Income Fund | Invesco Limited Term Municipal Income Fund | Liquidity Risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock
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.
Invesco Limited Term Municipal Income Fund | Invesco Limited Term Municipal Income Fund | Municipal Lease Obligations Risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock
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.
Invesco Limited Term Municipal Income Fund | Invesco Limited Term Municipal Income Fund | Valuation Risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock
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.
Invesco Limited Term Municipal Income Fund | Invesco Limited Term Municipal Income Fund | Management Risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock
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.
Invesco Limited Term Municipal Income Fund | Invesco Limited Term Municipal Income Fund | Class A  
Prospectus [Line Items] oef_ProspectusLineItems  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) oef_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 2.50%
Maximum Deferred Sales Charge (as a percentage of Offering Price) oef_MaximumDeferredSalesChargeOverOfferingPrice 0.00% [1]
Management Fees (as a percentage of Assets) oef_ManagementFeesOverAssets 0.23%
Distribution and Service (12b-1) Fees oef_DistributionAndService12b1FeesOverAssets 0.25%
Other Expenses oef_Component1OtherExpensesOverAssets 0.11%
Expenses (as a percentage of Assets) oef_ExpensesOverAssets 0.59%
Expense Example, with Redemption, 1 Year oef_ExpenseExampleYear01 $ 309
Expense Example, with Redemption, 3 Years oef_ExpenseExampleYear03 434
Expense Example, with Redemption, 5 Years oef_ExpenseExampleYear05 571
Expense Example, with Redemption, 10 Years oef_ExpenseExampleYear10 969
Expense Example, No Redemption, 1 Year oef_ExpenseExampleNoRedemptionYear01 309
Expense Example, No Redemption, 3 Years oef_ExpenseExampleNoRedemptionYear03 434
Expense Example, No Redemption, 5 Years oef_ExpenseExampleNoRedemptionYear05 571
Expense Example, No Redemption, 10 Years oef_ExpenseExampleNoRedemptionYear10 $ 969
Invesco Limited Term Municipal Income Fund | Invesco Limited Term Municipal Income Fund | Class A2  
Prospectus [Line Items] oef_ProspectusLineItems  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) oef_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 1.00%
Maximum Deferred Sales Charge (as a percentage of Offering Price) oef_MaximumDeferredSalesChargeOverOfferingPrice 0.00%
Management Fees (as a percentage of Assets) oef_ManagementFeesOverAssets 0.23%
Distribution and Service (12b-1) Fees oef_DistributionAndService12b1FeesOverAssets 0.00%
Other Expenses oef_Component1OtherExpensesOverAssets 0.11%
Expenses (as a percentage of Assets) oef_ExpensesOverAssets 0.34%
Expense Example, with Redemption, 1 Year oef_ExpenseExampleYear01 $ 134
Expense Example, with Redemption, 3 Years oef_ExpenseExampleYear03 208
Expense Example, with Redemption, 5 Years oef_ExpenseExampleYear05 289
Expense Example, with Redemption, 10 Years oef_ExpenseExampleYear10 526
Expense Example, No Redemption, 1 Year oef_ExpenseExampleNoRedemptionYear01 134
Expense Example, No Redemption, 3 Years oef_ExpenseExampleNoRedemptionYear03 208
Expense Example, No Redemption, 5 Years oef_ExpenseExampleNoRedemptionYear05 289
Expense Example, No Redemption, 10 Years oef_ExpenseExampleNoRedemptionYear10 $ 526
Invesco Limited Term Municipal Income Fund | Invesco Limited Term Municipal Income Fund | Class R5  
Prospectus [Line Items] oef_ProspectusLineItems  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) oef_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 0.00%
Maximum Deferred Sales Charge (as a percentage of Offering Price) oef_MaximumDeferredSalesChargeOverOfferingPrice 0.00%
Management Fees (as a percentage of Assets) oef_ManagementFeesOverAssets 0.23%
Distribution and Service (12b-1) Fees oef_DistributionAndService12b1FeesOverAssets 0.00%
Other Expenses oef_Component1OtherExpensesOverAssets 0.13%
Expenses (as a percentage of Assets) oef_ExpensesOverAssets 0.36%
Expense Example, with Redemption, 1 Year oef_ExpenseExampleYear01 $ 37
Expense Example, with Redemption, 3 Years oef_ExpenseExampleYear03 116
Expense Example, with Redemption, 5 Years oef_ExpenseExampleYear05 202
Expense Example, with Redemption, 10 Years oef_ExpenseExampleYear10 456
Expense Example, No Redemption, 1 Year oef_ExpenseExampleNoRedemptionYear01 37
Expense Example, No Redemption, 3 Years oef_ExpenseExampleNoRedemptionYear03 116
Expense Example, No Redemption, 5 Years oef_ExpenseExampleNoRedemptionYear05 202
Expense Example, No Redemption, 10 Years oef_ExpenseExampleNoRedemptionYear10 $ 456
Invesco Limited Term Municipal Income Fund | Invesco Limited Term Municipal Income Fund | Class Y  
Prospectus [Line Items] oef_ProspectusLineItems  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) oef_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 0.00%
Maximum Deferred Sales Charge (as a percentage of Offering Price) oef_MaximumDeferredSalesChargeOverOfferingPrice 0.00%
Management Fees (as a percentage of Assets) oef_ManagementFeesOverAssets 0.23%
Distribution and Service (12b-1) Fees oef_DistributionAndService12b1FeesOverAssets 0.00%
Other Expenses oef_Component1OtherExpensesOverAssets 0.11%
Expenses (as a percentage of Assets) oef_ExpensesOverAssets 0.34%
Expense Example, with Redemption, 1 Year oef_ExpenseExampleYear01 $ 35
Expense Example, with Redemption, 3 Years oef_ExpenseExampleYear03 109
Expense Example, with Redemption, 5 Years oef_ExpenseExampleYear05 191
Expense Example, with Redemption, 10 Years oef_ExpenseExampleYear10 431
Expense Example, No Redemption, 1 Year oef_ExpenseExampleNoRedemptionYear01 35
Expense Example, No Redemption, 3 Years oef_ExpenseExampleNoRedemptionYear03 109
Expense Example, No Redemption, 5 Years oef_ExpenseExampleNoRedemptionYear05 191
Expense Example, No Redemption, 10 Years oef_ExpenseExampleNoRedemptionYear10 $ 431
Invesco Limited Term Municipal Income Fund | Invesco Limited Term Municipal Income Fund | Class C  
Prospectus [Line Items] oef_ProspectusLineItems  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) oef_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 0.00%
Maximum Deferred Sales Charge (as a percentage of Offering Price) oef_MaximumDeferredSalesChargeOverOfferingPrice 1.00%
Management Fees (as a percentage of Assets) oef_ManagementFeesOverAssets 0.23%
Distribution and Service (12b-1) Fees oef_DistributionAndService12b1FeesOverAssets 1.00%
Other Expenses oef_Component1OtherExpensesOverAssets 0.11%
Expenses (as a percentage of Assets) oef_ExpensesOverAssets 1.34%
Expense Example, with Redemption, 1 Year oef_ExpenseExampleYear01 $ 236
Expense Example, with Redemption, 3 Years oef_ExpenseExampleYear03 425
Expense Example, with Redemption, 5 Years oef_ExpenseExampleYear05 734
Expense Example, with Redemption, 10 Years oef_ExpenseExampleYear10 1,406
Expense Example, No Redemption, 1 Year oef_ExpenseExampleNoRedemptionYear01 136
Expense Example, No Redemption, 3 Years oef_ExpenseExampleNoRedemptionYear03 425
Expense Example, No Redemption, 5 Years oef_ExpenseExampleNoRedemptionYear05 734
Expense Example, No Redemption, 10 Years oef_ExpenseExampleNoRedemptionYear10 $ 1,406
Invesco Limited Term Municipal Income Fund | Invesco Limited Term Municipal Income Fund | Class R6  
Prospectus [Line Items] oef_ProspectusLineItems  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) oef_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 0.00%
Maximum Deferred Sales Charge (as a percentage of Offering Price) oef_MaximumDeferredSalesChargeOverOfferingPrice 0.00%
Management Fees (as a percentage of Assets) oef_ManagementFeesOverAssets 0.23%
Distribution and Service (12b-1) Fees oef_DistributionAndService12b1FeesOverAssets 0.00%
Other Expenses oef_Component1OtherExpensesOverAssets 0.05%
Expenses (as a percentage of Assets) oef_ExpensesOverAssets 0.28%
Expense Example, with Redemption, 1 Year oef_ExpenseExampleYear01 $ 29
Expense Example, with Redemption, 3 Years oef_ExpenseExampleYear03 90
Expense Example, with Redemption, 5 Years oef_ExpenseExampleYear05 157
Expense Example, with Redemption, 10 Years oef_ExpenseExampleYear10 356
Expense Example, No Redemption, 1 Year oef_ExpenseExampleNoRedemptionYear01 29
Expense Example, No Redemption, 3 Years oef_ExpenseExampleNoRedemptionYear03 90
Expense Example, No Redemption, 5 Years oef_ExpenseExampleNoRedemptionYear05 157
Expense Example, No Redemption, 10 Years oef_ExpenseExampleNoRedemptionYear10 $ 356
Invesco Limited Term Municipal Income Fund | S&P Municipal Bond Index (reflects no deduction for fees, expenses or taxes)  
Prospectus [Line Items] oef_ProspectusLineItems  
Average Annual Return, Percent oef_AvgAnnlRtrPct 4.26%
Average Annual Return, Percent oef_AvgAnnlRtrPct 1.06%
Average Annual Return, Percent oef_AvgAnnlRtrPct 2.44%
Invesco Limited Term Municipal Income Fund | S&P Municipal Bond Investment Grade Short Intermediate Index (reflects no deduction for fees, expenses or taxes)  
Prospectus [Line Items] oef_ProspectusLineItems  
Average Annual Return, Percent oef_AvgAnnlRtrPct 4.73%
Average Annual Return, Percent oef_AvgAnnlRtrPct 1.29%
Average Annual Return, Percent oef_AvgAnnlRtrPct 1.87%
Invesco Limited Term Municipal Income Fund | Class A  
Prospectus [Line Items] oef_ProspectusLineItems  
Average Annual Return, Percent oef_AvgAnnlRtrPct 1.33%
Average Annual Return, Percent oef_AvgAnnlRtrPct 0.98%
Average Annual Return, Percent oef_AvgAnnlRtrPct 1.52%
Performance Inception Date oef_PerfInceptionDate Oct. 31, 2002
Invesco Limited Term Municipal Income Fund | Class A2  
Prospectus [Line Items] oef_ProspectusLineItems  
Annual Return [Percent] oef_AnnlRtrPct (0.31%)
Annual Return [Percent] oef_AnnlRtrPct 2.68%
Annual Return [Percent] oef_AnnlRtrPct 1.13%
Annual Return [Percent] oef_AnnlRtrPct 4.34%
Annual Return [Percent] oef_AnnlRtrPct 3.72%
Annual Return [Percent] oef_AnnlRtrPct 0.58%
Annual Return [Percent] oef_AnnlRtrPct (2.63%)
Annual Return [Percent] oef_AnnlRtrPct 4.26%
Annual Return [Percent] oef_AnnlRtrPct 2.56%
Annual Return [Percent] oef_AnnlRtrPct 4.18%
Average Annual Return, Percent oef_AvgAnnlRtrPct 3.14%
Average Annual Return, Percent oef_AvgAnnlRtrPct 1.55%
Average Annual Return, Percent oef_AvgAnnlRtrPct 1.92%
Performance Inception Date oef_PerfInceptionDate May 11, 1987
Invesco Limited Term Municipal Income Fund | Class A2 | After Taxes on Distributions  
Prospectus [Line Items] oef_ProspectusLineItems  
Average Annual Return, Percent oef_AvgAnnlRtrPct 3.14%
Average Annual Return, Percent oef_AvgAnnlRtrPct 1.54%
Average Annual Return, Percent oef_AvgAnnlRtrPct 1.92%
Invesco Limited Term Municipal Income Fund | Class A2 | After Taxes on Distributions and Sales  
Prospectus [Line Items] oef_ProspectusLineItems  
Average Annual Return, Percent oef_AvgAnnlRtrPct 3.35%
Average Annual Return, Percent oef_AvgAnnlRtrPct 1.81%
Average Annual Return, Percent oef_AvgAnnlRtrPct 2.04%
Invesco Limited Term Municipal Income Fund | Class R5  
Prospectus [Line Items] oef_ProspectusLineItems  
Average Annual Return, Percent oef_AvgAnnlRtrPct 4.17%
Average Annual Return, Percent oef_AvgAnnlRtrPct 1.75%
Average Annual Return, Percent oef_AvgAnnlRtrPct 2.04%
Performance Inception Date oef_PerfInceptionDate Jul. 30, 2004
Invesco Limited Term Municipal Income Fund | Class Y  
Prospectus [Line Items] oef_ProspectusLineItems  
Average Annual Return, Percent oef_AvgAnnlRtrPct 4.28%
Average Annual Return, Percent oef_AvgAnnlRtrPct 1.76%
Average Annual Return, Percent oef_AvgAnnlRtrPct 2.03%
Performance Inception Date oef_PerfInceptionDate Oct. 03, 2008
Invesco Limited Term Municipal Income Fund | Class C  
Prospectus [Line Items] oef_ProspectusLineItems  
Average Annual Return, Percent oef_AvgAnnlRtrPct 2.14%
Average Annual Return, Percent oef_AvgAnnlRtrPct 0.74%
Average Annual Return, Percent oef_AvgAnnlRtrPct 1.15%
Performance Inception Date oef_PerfInceptionDate Jun. 28, 2013
Invesco Limited Term Municipal Income Fund | Class R6  
Prospectus [Line Items] oef_ProspectusLineItems  
Average Annual Return, Percent oef_AvgAnnlRtrPct 4.25%
Average Annual Return, Percent oef_AvgAnnlRtrPct 1.83%
Average Annual Return, Percent oef_AvgAnnlRtrPct 2.06% [2]
Performance Inception Date oef_PerfInceptionDate Apr. 04, 2017
[1] A contingent deferred sales charge may apply in some cases. See “Shareholder Account Information-Contingent Deferred Sales Charges (CDSCs).”
[2] Performance shown prior to the inception date is that of the Fund's Class A shares at net asset value and includes the 12b-1 fees applicable to that class. Although invested in the same portfolio of securities, Class R6 shares' returns of the Fund will be different from Class A shares' returns of the Fund as they have different expenses.