Label	Element	Value
Risk/Return:	rr_RiskReturnAbstract
Registrant Name	dei_EntityRegistrantName	AIM INVESTMENT FUNDS (INVESCO INVESTMENT FUNDS)
Prospectus Date	rr_ProspectusDate	Feb. 28, 2013
Class A, B, C and Y | INVESCO Developing Markets Fund
Risk/Return:	rr_RiskReturnAbstract
Risk/Return [Heading]	rr_RiskReturnHeading	Fund Summary
Objective [Heading]	rr_ObjectiveHeading	Investment Objective(s)
Objective, Primary [Text Block]	rr_ObjectivePrimaryTextBlock	The Fund’s investment objective is long-term growth of capital.
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)
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 19% of the average value of its portfolio.
Portfolio Turnover, Rate	rr_PortfolioTurnoverRate	19.00%
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. 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).
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 Narrative [Text Block]	rr_ExpenseExampleNoRedemptionNarrativeTextBlock	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 securities of issuers in developing countries, i.e., those that are in the initial stages of their industrial cycles, and in derivatives and other instruments that have economic characteristics similar to such securities. Developing countries are those countries in the world other than the United States of America, Canada, Japan, Australia, New Zealand, Iceland, Norway, Switzerland, Hong Kong, Singapore, Israel and the developed countries of the European Union. A complete list of developed countries of the European Union can be found in the Fund's SAI. The Fund uses various criteria to determine whether an issuer is in a developing country, including whether (1) it is organized under the laws of a developing country; (2) it has a principal office in a developing country; (3) it derives 50% or more of its total revenues from business in a developing country; or (4) its securities are trading principally on a security exchange, or in an over-the-counter market, in a developing country. The Fund invests primarily in equity securities and depositary receipts. The principal types of equity securities in which the Fund invests are common and preferred stock. The Fund invests primarily in securities of issuers that are considered by the Fund's portfolio managers to have potential for earnings or revenue growth. The Fund may invest in the securities of issuers of all capitalization sizes; however, the Fund may invest a significant amount of its net assets in the securities of small- and mid-capitalization issuers. The Fund may invest up to 100% of its net assets in foreign securities, including securities of issuers in developing countries. Currently the Fund is unable to trade in local shares of Indian companies. The Fund can invest in derivative instruments including forward foreign currency contracts and futures contracts. The Fund can use forward foreign currency contracts to hedge against adverse movements in the foreign currencies in which portfolio securities are denominated. The Fund can use futures contracts to gain exposure to the broad market in connection with managing cash balances or to hedge against downside risk. The portfolio managers employ a disciplined investment strategy that emphasizes fundamental research to identify quality growth companies and is supported by quantitative analysis, portfolio construction and risk management techniques. Investments for the portfolio are selected bottom-up on a security-by-security basis. The focus is on the strengths of individual issuers, rather than sector or country trends. The portfolio managers' strategy primarily focuses on identifying issuers that they believe have sustainable above-average earnings growth, efficient capital allocation, and attractive prices. The Fund's portfolio managers may consider selling a security for several reasons, including when (1) its price changes such that they believe it has become too expensive; (2) the original investment thesis for the company is no longer valid, or (3) a more compelling investment opportunity is identified.
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: Depositary Receipts Risk. Depositary receipts involve many of the same risks as those associated with direct investment in foreign securities.In addition, the underlying issuers of certain depositary receipts, particularly unsponsored or unregistered depositary receipts, are under no obligation to distribute shareholder communications to the holders of such receipts or to pass through to them any voting rights with respect to the deposited securities. Derivatives Risk. The performance of derivative instruments is tied to the performance of an underlying currency, security, index, commodity 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 Adviser elects not to do so due to availability, cost, market conditions or other factors. Developing/Emerging Markets Securities Risk. The prices of securities issued by foreign companies and governments located in developing/emerging markets 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. Geographic Focus Risk. From time to time the Fund may invest a substantial amount of its assets in securities of issuers located in a single country or a limited number of countries. If the Fund focuses its investments in this manner, it assumes the risk that economic, political and social conditions in those countries will have a significant impact on its investment performance. The Fund's investment performance may also be more volatile if it focuses its investments in certain countries, especially emerging markets countries. Growth Investing Risk. Growth stocks tend to be more expensive relative to their earnings or assets compared with other types of stock. As a result they tend to be more sensitive to changes in their earnings and can be more volatile. 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. Small- and Mid-Capitalization Risks. Stocks of small- and mid-sized companies tend to be more vulnerable to adverse developments and may have little or no operating history or track record of success, and limited product lines, markets, management and financial resources. The securities of small- and mid-sized companies may be more volatile due to less market interest and less publicly available information about the issuer. They also may be illiquid or restricted as to resale, or may trade less frequently and in smaller volumes, all of which may cause difficulty when establishing or closing a position at a desirable price.
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 Web site 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 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.
2003	rr_AnnualReturn2003	54.73%
2004	rr_AnnualReturn2004	27.62%
2005	rr_AnnualReturn2005	35.47%
2006	rr_AnnualReturn2006	38.83%
2007	rr_AnnualReturn2007	32.79%
2008	rr_AnnualReturn2008	(52.58%)
2009	rr_AnnualReturn2009	83.52%
2010	rr_AnnualReturn2010	21.33%
2011	rr_AnnualReturn2011	(11.34%)
2012	rr_AnnualReturn2012	19.52%
Bar Chart Closing [Text Block]	rr_BarChartClosingTextBlock	Best Quarter (ended June 30, 2009): 39.04% Worst Quarter (ended December 31, 2008): -28.88%
Highest Quarterly Return, Label	rr_HighestQuarterlyReturnLabel	Best Quarter
Highest Quarterly Return, Date	rr_BarChartHighestQuarterlyReturnDate	Jun. 30, 2009
Highest Quarterly Return	rr_BarChartHighestQuarterlyReturn	39.04%
Lowest Quarterly Return, Label	rr_LowestQuarterlyReturnLabel	Worst Quarter
Lowest Quarterly Return, Date	rr_BarChartLowestQuarterlyReturnDate	Dec. 31, 2008
Lowest Quarterly Return	rr_BarChartLowestQuarterlyReturn	(28.88%)
Performance Table Heading	rr_PerformanceTableHeading	Average Annual Total Returns (for the periods ended December 31, 2012)
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 and Y | INVESCO Developing Markets Fund | Class A
Risk/Return:	rr_RiskReturnAbstract
Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	5.50%
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	0.87%
Distribution and/or Service (12b-1) Fees	rr_DistributionAndService12b1FeesOverAssets	0.25%
Other Expenses	rr_OtherExpensesOverAssets	0.33%
Total Annual Fund Operating Expenses	rr_ExpensesOverAssets	1.45%
1 Year	rr_ExpenseExampleYear01	689
3 Years	rr_ExpenseExampleYear03	983
5 Years	rr_ExpenseExampleYear05	1,299
10 Years	rr_ExpenseExampleYear10	2,190
1 Year	rr_ExpenseExampleNoRedemptionYear01	689
3 Years	rr_ExpenseExampleNoRedemptionYear03	983
5 Years	rr_ExpenseExampleNoRedemptionYear05	1,299
10 Years	rr_ExpenseExampleNoRedemptionYear10	2,190
1 Year	rr_AverageAnnualReturnYear01	12.95%
5 Years	rr_AverageAnnualReturnYear05	1.12%
10 Years	rr_AverageAnnualReturnYear10	17.96%
Inception Date	rr_AverageAnnualReturnInceptionDate	Jan. 11, 1994
Class A, B, C and Y | INVESCO Developing Markets 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	0.87%
Distribution and/or Service (12b-1) Fees	rr_DistributionAndService12b1FeesOverAssets	1.00%
Other Expenses	rr_OtherExpensesOverAssets	0.33%
Total Annual Fund Operating Expenses	rr_ExpensesOverAssets	2.20%
1 Year	rr_ExpenseExampleYear01	723
3 Years	rr_ExpenseExampleYear03	988
5 Years	rr_ExpenseExampleYear05	1,380
10 Years	rr_ExpenseExampleYear10	2,344
1 Year	rr_ExpenseExampleNoRedemptionYear01	223
3 Years	rr_ExpenseExampleNoRedemptionYear03	688
5 Years	rr_ExpenseExampleNoRedemptionYear05	1,180
10 Years	rr_ExpenseExampleNoRedemptionYear10	2,344
1 Year	rr_AverageAnnualReturnYear01	13.64%
5 Years	rr_AverageAnnualReturnYear05	1.13%
10 Years	rr_AverageAnnualReturnYear10	17.98%
Inception Date	rr_AverageAnnualReturnInceptionDate	Nov. 03, 1997
Class A, B, C and Y | INVESCO Developing Markets 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	0.87%
Distribution and/or Service (12b-1) Fees	rr_DistributionAndService12b1FeesOverAssets	1.00%
Other Expenses	rr_OtherExpensesOverAssets	0.33%
Total Annual Fund Operating Expenses	rr_ExpensesOverAssets	2.20%
1 Year	rr_ExpenseExampleYear01	323
3 Years	rr_ExpenseExampleYear03	688
5 Years	rr_ExpenseExampleYear05	1,180
10 Years	rr_ExpenseExampleYear10	2,534
1 Year	rr_ExpenseExampleNoRedemptionYear01	223
3 Years	rr_ExpenseExampleNoRedemptionYear03	688
5 Years	rr_ExpenseExampleNoRedemptionYear05	1,180
10 Years	rr_ExpenseExampleNoRedemptionYear10	2,534
1 Year	rr_AverageAnnualReturnYear01	17.67%
5 Years	rr_AverageAnnualReturnYear05	1.50%
10 Years	rr_AverageAnnualReturnYear10	17.81%
Inception Date	rr_AverageAnnualReturnInceptionDate	Mar. 01, 1999
Class A, B, C and Y | INVESCO Developing Markets 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	0.87%
Distribution and/or Service (12b-1) Fees	rr_DistributionAndService12b1FeesOverAssets	none
Other Expenses	rr_OtherExpensesOverAssets	0.33%
Total Annual Fund Operating Expenses	rr_ExpensesOverAssets	1.20%
1 Year	rr_ExpenseExampleYear01	122
3 Years	rr_ExpenseExampleYear03	381
5 Years	rr_ExpenseExampleYear05	660
10 Years	rr_ExpenseExampleYear10	1,455
1 Year	rr_ExpenseExampleNoRedemptionYear01	122
3 Years	rr_ExpenseExampleNoRedemptionYear03	381
5 Years	rr_ExpenseExampleNoRedemptionYear05	660
10 Years	rr_ExpenseExampleNoRedemptionYear10	1,455
1 Year	rr_AverageAnnualReturnYear01	19.85%	[1]
5 Years	rr_AverageAnnualReturnYear05	2.49%	[1]
10 Years	rr_AverageAnnualReturnYear10	18.75%	[1]
Inception Date	rr_AverageAnnualReturnInceptionDate	Oct. 03, 2008	[1]
Class A, B, C and Y | INVESCO Developing Markets Fund | Return After Taxes on Distributions | Class A
Risk/Return:	rr_RiskReturnAbstract
1 Year	rr_AverageAnnualReturnYear01	12.83%
5 Years	rr_AverageAnnualReturnYear05	0.96%
10 Years	rr_AverageAnnualReturnYear10	17.77%
Inception Date	rr_AverageAnnualReturnInceptionDate	Jan. 11, 1994
Class A, B, C and Y | INVESCO Developing Markets Fund | Return After Taxes on Distributions and Sale of Fund Shares | Class A
Risk/Return:	rr_RiskReturnAbstract
1 Year	rr_AverageAnnualReturnYear01	8.58%
5 Years	rr_AverageAnnualReturnYear05	1.00%
10 Years	rr_AverageAnnualReturnYear10	16.46%
Inception Date	rr_AverageAnnualReturnInceptionDate	Jan. 11, 1994
Class A, B, C and Y | INVESCO Developing Markets Fund | MSCI EAFE® Index
Risk/Return:	rr_RiskReturnAbstract
1 Year	rr_AverageAnnualReturnYear01	17.32%
5 Years	rr_AverageAnnualReturnYear05	(3.69%)
10 Years	rr_AverageAnnualReturnYear10	8.21%
Class A, B, C and Y | INVESCO Developing Markets Fund | MSCI Emerging Markets Index℠
Risk/Return:	rr_RiskReturnAbstract
1 Year	rr_AverageAnnualReturnYear01	18.22%
5 Years	rr_AverageAnnualReturnYear05	(0.92%)
10 Years	rr_AverageAnnualReturnYear10	16.52%
Class A, B, C and Y | INVESCO Developing Markets Fund | Lipper Emerging Market Funds Index
Risk/Return:	rr_RiskReturnAbstract
1 Year	rr_AverageAnnualReturnYear01	20.08%
5 Years	rr_AverageAnnualReturnYear05	(1.48%)
10 Years	rr_AverageAnnualReturnYear10	15.89%

[1] Class Y 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 waivers or expense reimbursements.