Label	Element	Value
Risk/Return:	rr_RiskReturnAbstract
Registrant Name	dei_EntityRegistrantName	AIM INVESTMENT SECURITIES FUNDS (INVESCO INVESTMENT SECURITIES FUNDS)
Prospectus Date	rr_ProspectusDate	Jun. 28, 2012
Class A, B, C, Y And Investor | Invesco High Yield Fund
Risk/Return:	rr_RiskReturnAbstract
Risk/Return [Heading]	rr_RiskReturnHeading	Fund Summary - Invesco High Yield Fund
Objective [Heading]	rr_ObjectiveHeading	Investment Objective(s)
Objective, Primary [Text Block]	rr_ObjectivePrimaryTextBlock	The Fund’s investment objective is total return, comprised of current income and capital appreciation.
Expense [Heading]	rr_ExpenseHeading	Fees and Expenses of the Fund
Expense Narrative [Text Block]	rr_ExpenseNarrativeTextBlock	This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund.           You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 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 [Text]	rr_ShareholderFeesCaption	Shareholder Fees (fees paid directly from your investment)
Operating Expenses Caption [Text]	rr_OperatingExpensesCaption	Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Fee Waiver or Reimbursement over Assets, Date of Termination	rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination	June 30, 2013
Portfolio Turnover [Heading]	rr_PortfolioTurnoverHeading	Portfolio Turnover.
Portfolio Turnover [Text Block]	rr_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 65% of the average value of its portfolio.
Portfolio Turnover, Rate	rr_PortfolioTurnoverRate	65.00%
Expense Breakpoint Discounts [Text]	rr_ExpenseBreakpointDiscounts	You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in the Invesco Funds.
Expense Breakpoint, Minimum Investment Required [Amount]	rr_ExpenseBreakpointMinimumInvestmentRequiredAmount	50,000
Expense Example [Heading]	rr_ExpenseExampleHeading	Example.
Expense Example Narrative [Text Block]	rr_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. 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]	rr_ExpenseExampleNoRedemptionByYearCaption	You would pay the following expenses if you did not redeem your shares:
Strategy [Heading]	rr_StrategyHeading	Principal Investment Strategies of the Fund
Strategy Narrative [Text Block]	rr_StrategyNarrativeTextBlock	The Fund invests under normal circumstances at least 80% of its net assets (plus any borrowings for investment purposes) in debt securities that are determined to be below investment grade quality.           In complying with the 80% investment requirement, the Fund may include synthetic securities that have economic characteristics similar to the Fund’s direct investments that are counted toward the 80% investment requirement.           The Fund considers debt securities to be below investment grade quality if they are rated BB/Ba or lower by Standard & Poor’s Ratings Services, Moody’s Investors Service, Inc., or any other nationally recognized statistical rating organization (NRSRO), or are determined by the portfolio managers to be of comparable quality to such rated securities. These types of securities are commonly known as “junk bonds.” The Fund will principally invest in junk bonds rated B or above by an NRSRO or deemed to be of comparable quality by the portfolio managers.           The Fund may invest up to 25% of its total assets in foreign securities. The Fund may also invest in securities, whether or not considered foreign securities, which carry foreign credit exposure. The Fund may also invest up to 15% of its total assets in securities of issuers located in developing markets.           In selecting securities for the Fund’s portfolio, the portfolio managers focus on junk bonds that they believe have favorable prospects for high current income and the possibility of growth of capital. Before purchasing securities for the Fund, the portfolio managers conduct a bottom-up fundamental analysis of an issuer that involves an evaluation by a team of credit analysts of an issuer’s financial condition. The fundamental analysis is supplemented by (i) an ongoing review of the securities’ relative value compared with other junk bonds, and (ii) a top-down analysis of sector and macro-economic trends.           The portfolio managers attempt to control the Fund’s risk by (i) limiting the portfolio’s assets that are invested in any one security, and (ii) diversifying the portfolio’s holdings over a number of different industries. The portfolio managers will consider selling a security if (1) there appears to be deterioration in a security’s risk profile, or (2) they determine that other securities offer better value.           The Fund can invest in derivative instruments, specifically forward currency contracts, to mitigate the risk of foreign currency exposure, and credit default swaps and credit default swap indexes, to gain or reduce exposure to an asset class or a particular issuer.           A forward currency contract is an agreement between parties to exchange a specified amount of currency at a specified future time at a specified rate. Forward currency contracts are used to protect against uncertainty in the level of future currency exchange rates or to gain or modify exposure to a particular currency. The Fund can use these contracts to hedge against adverse movements in the foreign currencies in which portfolio securities are denominated.           A credit default swap is an agreement between two parties where the first party agrees to make one or more payments to the second party, while the second party assumes the risk of certain defaults. The Fund can enter into credit default swaps to create long or short exposure to corporate or sovereign debt securities. The Fund can buy a credit default swap (buy credit protection) or sell a credit default swap (sell credit protection). When the Fund buys a credit default swap it makes a stream of payments based on a fixed interest rate (the premium) over the life of the swap in exchange for a counterparty (the seller) taking on the risk of default of a reference debt obligation. Alternatively, the Fund can sell a credit default swap whereby the Fund can receive premium payments from the buyer in exchange for taking the risk of default of the underlying reference obligation.           The Fund can invest in credit default swap indices which are credit derivatives used to hedge credit risk or take a position on a basket of credit entities. Credit default swap indices allow an investor to gain or reduce exposure on a basket of credit entities in a more efficient manner than transacting in single name credit default swaps. Unlike a credit default swap, a credit default swap index is a standardized credit security and therefore may be more liquid.
Risk [Heading]	rr_RiskHeading	Principal Risks of Investing in the Fund
Risk Narrative [Text Block]	rr_RiskNarrativeTextBlock	As with any mutual fund investment, loss of money is a risk of investing. 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. The risks associated with an investment in the Fund can increase during times of significant market volatility. The principal risks of investing in the Fund are:           Credit Risk. The issuer of instruments in which the Fund invests may be unable to meet interest and/or principal payments, thereby causing its instruments to decrease in value and lowering the issuer’s credit rating.           Derivatives Risk. The performance of derivative instruments is tied to the performance of an underlying currency, security, index or other instrument. In addition to risks relating to their underlying instruments, the use of derivatives may include other, possibly greater, risks. Derivatives involve costs, may be volatile, and may involve a small initial investment relative to the risk assumed. Risks associated with the use of derivatives may include counterparty, leverage, correlation, liquidity, tax, market, interest rate and management risks. Derivatives may also be more difficult to purchase, sell or value than other investments. The Fund may lose more than the cash amount invested on investments in derivatives. Investors should bear in mind that, while the Fund intends to use derivative strategies, it is not obligated to actively engage in these transactions, generally or in any particular kind of derivative, if the investment manager elects not to do so due to availability, cost, market conditions or other factors.           Developing/Emerging Markets Securities Risk. Securities issued by foreign companies and governments located in developing/emerging countries may be affected more negatively by inflation, devaluation of their currencies, higher transaction costs, delays in settlement, adverse political developments, the introduction of capital controls, withholding taxes, nationalization of private assets, expropriation, social unrest, war or lack of timely information than those in developed countries.           Foreign Securities Risk. The Fund’s foreign investments may be affected by changes in a foreign country’s exchange rates, political and social instability, changes in economic or taxation policies, difficulties when enforcing obligations, decreased liquidity, and increased volatility. Foreign companies may be subject to less regulation resulting in less publicly available information about the companies.           High Yield Bond (Junk Bond) Risk. Junk bonds involve a greater risk of default or price changes due to changes in the credit quality of the issuer. The values of junk bonds fluctuate more than those of high-quality bonds in response to company, political, regulatory or economic developments. Values of junk bonds can decline significantly over short periods of time.           Interest Rate Risk. Interest rate risk refers to the risk that bond prices generally fall as interest rates rise; conversely, bond prices generally rise as interest rates fall. Specific bonds differ in their sensitivity to changes in interest rates depending on their individual characteristics, including duration.           Management Risk. The investment techniques and risk analysis used by the Fund’s portfolio managers may not produce the desired results.           Market Risk. The prices of and the income generated by the Fund’s securities may decline in response to, among other things, investor sentiment, general economic and market conditions, regional or global instability, and currency and interest rate fluctuations.           Reinvestment Risk. Reinvestment risk is the risk that a bond’s cash flows (coupon income and principal repayment) will be reinvested at an interest rate below that on the original bond.           Synthetic Securities Risk. Fluctuations in the values of synthetic securities may not correlate perfectly with the instruments they are designed to replicate. Synthetic securities may be subject to interest rate changes, market price fluctuations, counterparty risk and liquidity risk.
Risk Lose Money [Text]	rr_RiskLoseMoney	As with any mutual fund investment, loss of money is a risk of investing.
Risk Not Insured Depository Institution [Text]	rr_RiskNotInsuredDepositoryInstitution	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.
Bar Chart and Performance Table [Heading]	rr_BarChartAndPerformanceTableHeading	Performance Information
Performance Narrative [Text Block]	rr_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-based securities market benchmark, a style specific benchmark and a peer group benchmark comprised of funds with investment objectives and strategies similar to the Fund. The Fund’s past performance (before and after taxes) is not necessarily an indication of its future performance. Updated performance information is available on the Fund’s website at www.invesco.com/us.
Performance Information Illustrates Variability of Returns [Text]	rr_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-based securities market benchmark, a style specific benchmark and a peer group benchmark comprised of funds with investment objectives and strategies similar to the Fund.
Performance Availability Website Address [Text]	rr_PerformanceAvailabilityWebSiteAddress	www.invesco.com/us
Performance Past Does Not Indicate Future [Text]	rr_PerformancePastDoesNotIndicateFuture	The Fund’s past performance (before and after taxes) is not necessarily an indication of its future performance.
Bar Chart [Heading]	rr_BarChartHeading	Annual Total Returns
Bar Chart Narrative [Text Block]	rr_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]	rr_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]	rr_BarChartClosingTextBlock	Class A shares year-to-date (ended March 31, 2012): 6.88% Best Quarter (ended June 30, 2009): 22.86% Worst Quarter (ended December 31, 2008): -19.72%
Performance Table Heading	rr_PerformanceTableHeading	Average Annual Total Returns (for the periods ended December 31, 2011)
Performance Table Uses Highest Federal Rate	rr_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	rr_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-deferred arrangements, such as 401(k) plans or individual retirement accounts.
Performance Table One Class of after Tax Shown [Text]	rr_PerformanceTableOneClassOfAfterTaxShown	After-tax returns are shown for Class A shares only and after-tax returns for other classes will vary.
Performance Table Narrative	rr_PerformanceTableNarrativeTextBlock	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-deferred arrangements, such as 401(k) plans or individual retirement accounts. After-tax returns are shown for Class A shares only and after-tax returns for other classes will vary.
Class A, B, C, Y And Investor | Invesco High Yield Fund | Class A
Risk/Return:	rr_RiskReturnAbstract
Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	4.75%
Maximum Deferred Sales Charge (Load) (as a percentage of original purchase price or redemption proceeds, whichever is less)	rr_MaximumDeferredSalesChargeOverOther	none
Management Fees	rr_ManagementFeesOverAssets	0.53%
Distribution and/or Service (12b-1) Fees	rr_DistributionAndService12b1FeesOverAssets	0.25%
Other Expenses	rr_OtherExpensesOverAssets	0.23%
Total Annual Fund Operating Expenses	rr_ExpensesOverAssets	1.01%
Fee Waiver and/or Expense Reimbursement	rr_FeeWaiverOrReimbursementOverAssets	0.12%	[1]
Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement	rr_NetExpensesOverAssets	0.89%
1 Year	rr_ExpenseExampleYear01	562
3 Years	rr_ExpenseExampleYear03	770
5 Years	rr_ExpenseExampleYear05	995
10 Years	rr_ExpenseExampleYear10	1,642
1 Year	rr_ExpenseExampleNoRedemptionYear01	562
3 Years	rr_ExpenseExampleNoRedemptionYear03	770
5 Years	rr_ExpenseExampleNoRedemptionYear05	995
10 Years	rr_ExpenseExampleNoRedemptionYear10	1,642
2002	rr_AnnualReturn2002	(10.38%)
2003	rr_AnnualReturn2003	30.19%
2004	rr_AnnualReturn2004	10.91%
2005	rr_AnnualReturn2005	2.46%
2006	rr_AnnualReturn2006	11.09%
2007	rr_AnnualReturn2007	1.13%
2008	rr_AnnualReturn2008	(25.41%)
2009	rr_AnnualReturn2009	54.09%
2010	rr_AnnualReturn2010	14.29%
2011	rr_AnnualReturn2011	1.43%
Year to Date Return, Label	rr_YearToDateReturnLabel	Class A shares year-to-date
Bar Chart, Year to Date Return, Date	rr_BarChartYearToDateReturnDate	Mar. 31, 2012
Bar Chart, Year to Date Return	rr_BarChartYearToDateReturn	6.88%
Highest Quarterly Return, Label	rr_HighestQuarterlyReturnLabel	Best Quarter
Highest Quarterly Return, Date	rr_BarChartHighestQuarterlyReturnDate	Jun. 30, 2009
Highest Quarterly Return	rr_BarChartHighestQuarterlyReturn	22.86%
Lowest Quarterly Return, Label	rr_LowestQuarterlyReturnLabel	Worst Quarter
Lowest Quarterly Return, Date	rr_BarChartLowestQuarterlyReturnDate	Dec. 31, 2008
Lowest Quarterly Return	rr_BarChartLowestQuarterlyReturn	(19.72%)
1 Year	rr_AverageAnnualReturnYear01	(3.34%)
5 Years	rr_AverageAnnualReturnYear05	5.10%
10 Years	rr_AverageAnnualReturnYear10	6.58%
Inception Date	rr_AverageAnnualReturnInceptionDate	Jul. 11, 1978
Class A, B, C, Y And Investor | Invesco High Yield Fund | Class B
Risk/Return:	rr_RiskReturnAbstract
Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum Deferred Sales Charge (Load) (as a percentage of original purchase price or redemption proceeds, whichever is less)	rr_MaximumDeferredSalesChargeOverOther	5.00%
Management Fees	rr_ManagementFeesOverAssets	0.53%
Distribution and/or Service (12b-1) Fees	rr_DistributionAndService12b1FeesOverAssets	1.00%
Other Expenses	rr_OtherExpensesOverAssets	0.23%
Total Annual Fund Operating Expenses	rr_ExpensesOverAssets	1.76%
Fee Waiver and/or Expense Reimbursement	rr_FeeWaiverOrReimbursementOverAssets	0.12%	[1]
Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement	rr_NetExpensesOverAssets	1.64%
1 Year	rr_ExpenseExampleYear01	667
3 Years	rr_ExpenseExampleYear03	842
5 Years	rr_ExpenseExampleYear05	1,143
10 Years	rr_ExpenseExampleYear10	1,865
1 Year	rr_ExpenseExampleNoRedemptionYear01	167
3 Years	rr_ExpenseExampleNoRedemptionYear03	542
5 Years	rr_ExpenseExampleNoRedemptionYear05	943
10 Years	rr_ExpenseExampleNoRedemptionYear10	1,865
1 Year	rr_AverageAnnualReturnYear01	(4.02%)
5 Years	rr_AverageAnnualReturnYear05	5.08%
10 Years	rr_AverageAnnualReturnYear10	6.48%
Inception Date	rr_AverageAnnualReturnInceptionDate	Sep. 01, 1993
Class A, B, C, Y And Investor | Invesco High Yield Fund | Class C
Risk/Return:	rr_RiskReturnAbstract
Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum Deferred Sales Charge (Load) (as a percentage of original purchase price or redemption proceeds, whichever is less)	rr_MaximumDeferredSalesChargeOverOther	1.00%
Management Fees	rr_ManagementFeesOverAssets	0.53%
Distribution and/or Service (12b-1) Fees	rr_DistributionAndService12b1FeesOverAssets	1.00%
Other Expenses	rr_OtherExpensesOverAssets	0.23%
Total Annual Fund Operating Expenses	rr_ExpensesOverAssets	1.76%
Fee Waiver and/or Expense Reimbursement	rr_FeeWaiverOrReimbursementOverAssets	0.12%	[1]
Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement	rr_NetExpensesOverAssets	1.64%
1 Year	rr_ExpenseExampleYear01	267
3 Years	rr_ExpenseExampleYear03	542
5 Years	rr_ExpenseExampleYear05	943
10 Years	rr_ExpenseExampleYear10	2,063
1 Year	rr_ExpenseExampleNoRedemptionYear01	167
3 Years	rr_ExpenseExampleNoRedemptionYear03	542
5 Years	rr_ExpenseExampleNoRedemptionYear05	943
10 Years	rr_ExpenseExampleNoRedemptionYear10	2,063
1 Year	rr_AverageAnnualReturnYear01	(0.28%)
5 Years	rr_AverageAnnualReturnYear05	5.35%
10 Years	rr_AverageAnnualReturnYear10	6.30%
Inception Date	rr_AverageAnnualReturnInceptionDate	Aug. 04, 1997
Class A, B, C, Y And Investor | Invesco High Yield Fund | Class Y
Risk/Return:	rr_RiskReturnAbstract
Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum Deferred Sales Charge (Load) (as a percentage of original purchase price or redemption proceeds, whichever is less)	rr_MaximumDeferredSalesChargeOverOther	none
Management Fees	rr_ManagementFeesOverAssets	0.53%
Distribution and/or Service (12b-1) Fees	rr_DistributionAndService12b1FeesOverAssets	none
Other Expenses	rr_OtherExpensesOverAssets	0.23%
Total Annual Fund Operating Expenses	rr_ExpensesOverAssets	0.76%
Fee Waiver and/or Expense Reimbursement	rr_FeeWaiverOrReimbursementOverAssets	0.12%	[1]
Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement	rr_NetExpensesOverAssets	0.64%
1 Year	rr_ExpenseExampleYear01	65
3 Years	rr_ExpenseExampleYear03	231
5 Years	rr_ExpenseExampleYear05	411
10 Years	rr_ExpenseExampleYear10	931
1 Year	rr_ExpenseExampleNoRedemptionYear01	65
3 Years	rr_ExpenseExampleNoRedemptionYear03	231
5 Years	rr_ExpenseExampleNoRedemptionYear05	411
10 Years	rr_ExpenseExampleNoRedemptionYear10	931
1 Year	rr_AverageAnnualReturnYear01	1.69%	[2]
5 Years	rr_AverageAnnualReturnYear05	6.31%	[2]
10 Years	rr_AverageAnnualReturnYear10	7.18%	[2]
Inception Date	rr_AverageAnnualReturnInceptionDate	Oct. 03, 2008
Class A, B, C, Y And Investor | Invesco High Yield Fund | Investor Class
Risk/Return:	rr_RiskReturnAbstract
Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum Deferred Sales Charge (Load) (as a percentage of original purchase price or redemption proceeds, whichever is less)	rr_MaximumDeferredSalesChargeOverOther	none
Management Fees	rr_ManagementFeesOverAssets	0.53%
Distribution and/or Service (12b-1) Fees	rr_DistributionAndService12b1FeesOverAssets	0.22%
Other Expenses	rr_OtherExpensesOverAssets	0.23%
Total Annual Fund Operating Expenses	rr_ExpensesOverAssets	0.98%
Fee Waiver and/or Expense Reimbursement	rr_FeeWaiverOrReimbursementOverAssets	0.12%	[1]
Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement	rr_NetExpensesOverAssets	0.86%
1 Year	rr_ExpenseExampleYear01	88
3 Years	rr_ExpenseExampleYear03	300
5 Years	rr_ExpenseExampleYear05	530
10 Years	rr_ExpenseExampleYear10	1,190
1 Year	rr_ExpenseExampleNoRedemptionYear01	88
3 Years	rr_ExpenseExampleNoRedemptionYear03	300
5 Years	rr_ExpenseExampleNoRedemptionYear05	530
10 Years	rr_ExpenseExampleNoRedemptionYear10	1,190
1 Year	rr_AverageAnnualReturnYear01	1.44%	[2]
5 Years	rr_AverageAnnualReturnYear05	6.17%	[2]
10 Years	rr_AverageAnnualReturnYear10	7.11%	[2]
Inception Date	rr_AverageAnnualReturnInceptionDate	Sep. 30, 2003
Class A, B, C, Y And Investor | Return After Taxes on Distributions | Invesco High Yield Fund | Class A
Risk/Return:	rr_RiskReturnAbstract
1 Year	rr_AverageAnnualReturnYear01	(5.75%)
5 Years	rr_AverageAnnualReturnYear05	2.08%
10 Years	rr_AverageAnnualReturnYear10	3.51%
Inception Date	rr_AverageAnnualReturnInceptionDate	Jul. 11, 1978
Class A, B, C, Y And Investor | Return After Taxes on Distributions and Sale of Fund Shares | Invesco High Yield Fund | Class A
Risk/Return:	rr_RiskReturnAbstract
1 Year	rr_AverageAnnualReturnYear01	(2.17%)
5 Years	rr_AverageAnnualReturnYear05	2.49%
10 Years	rr_AverageAnnualReturnYear10	3.70%
Inception Date	rr_AverageAnnualReturnInceptionDate	Jul. 11, 1978
Class A, B, C, Y And Investor | Barclays U.S. Aggregate Index (reflects no deduction for fees, expenses or taxes) | Invesco High Yield Fund
Risk/Return:	rr_RiskReturnAbstract
1 Year	rr_AverageAnnualReturnYear01	7.84%
5 Years	rr_AverageAnnualReturnYear05	6.50%
10 Years	rr_AverageAnnualReturnYear10	5.78%
Class A, B, C, Y And Investor | Barclays U.S. Corporate High Yield 2% Issuer Cap Index (reflects no deduction for fees, expenses or taxes) | Invesco High Yield Fund
Risk/Return:	rr_RiskReturnAbstract
1 Year	rr_AverageAnnualReturnYear01	4.96%
5 Years	rr_AverageAnnualReturnYear05	7.74%
10 Years	rr_AverageAnnualReturnYear10	8.96%
Class A, B, C, Y And Investor | Lipper High Current Yield Bond Funds Index | Invesco High Yield Fund
Risk/Return:	rr_RiskReturnAbstract
1 Year	rr_AverageAnnualReturnYear01	2.85%
5 Years	rr_AverageAnnualReturnYear05	5.13%
10 Years	rr_AverageAnnualReturnYear10	7.08%

[1] Invesco Advisers, Inc. (Invesco or the Adviser) has contractually agreed, through at least June 30, 2013 to waive advisory fees and/or reimburse expenses of all shares to the extent necessary to limit Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement (excluding certain items discussed in the SAI) of Class A, Class B, Class C, Class Y and Investor Class shares to 0.89%, 1.64%, 1.64%, 0.64% and 0.89%, respectively, of average daily net assets. Unless the Board of Trustees and Invesco mutually agree to amend or continue the fee waiver agreement, it will terminate on June 30, 2013.

[2] Class Y shares' and Investor Class shares' performance shown prior to the inception date is that of Class A shares and includes the 12b-1 fees applicable to Class A shares. Class A shares' performance reflects any applicable fee waiver and/or expense reimbursement.