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Risk/Return: rr_RiskReturnAbstract  
Document Type dei_DocumentType 485BPOS
Document Period End Date dei_DocumentPeriodEndDate Oct. 31, 2010
Registrant Name dei_EntityRegistrantName AIM INVESTMENT FUNDS (INVESCO INVESTMENT FUNDS)
Central Index Key dei_EntityCentralIndexKey 0000826644
Amendment Flag dei_AmendmentFlag false
Document Creation Date dei_DocumentCreationDate May 20, 2011
Document Effective Date dei_DocumentEffectiveDate May 23, 2011
Prospectus Date rr_ProspectusDate May 23, 2011
Invesco Pacific Growth 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 to maximize the capital appreciation of its investments.
Fees and Expenses of the Fund aimif826644_FundFeesAndExpensesAbstract  
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 Institutional Class shares of the Fund.
Shareholder Fees rr_ShareholderFeesAbstract  
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption Shareholder Fees (fees paid directly from your investment)
Annual Fund Operating Expenses rr_OperatingExpensesAbstract  
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)
Acquired Fund Fees and Expenses, Based on Estimates [Text] rr_AcquiredFundFeesAndExpensesBasedOnEstimates “Other Expenses” and “Total Annual Fund Operating Expenses” are based on estimated amounts for the current fiscal year.
Example rr_ExpenseExampleAbstract  
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:
Portfolio Turnover aimif826644_PortfolioTurnoverAltAbstract  
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. The portfolio turnover rate of the Morgan Stanley Pacific Growth Fund Inc. (the predecessor fund) and the Fund for the most recent fiscal year was 76% of the average value of the portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 76.00%
Strategy [Heading] rr_StrategyHeading Principal Investment Strategies of the Fund
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock

The Fund will normally invest at least 80% of its net assets (plus any borrowings for investment purposes) in common stocks (including depositary receipts) and preferred stocks of companies which have a principal place of business in, or which derive a majority of their revenues from business in, Asia, Australia or New Zealand (including emerging market or developing countries). The principal Asian countries include Japan, Malaysia, Singapore, Hong Kong, Thailand, the Philippines, India, Indonesia, Taiwan and South Korea. The Fund’s assets will be invested in at least three countries. The Fund, however, may invest more than 25% of its net assets in Japan, Hong Kong, Malaysia, South Korea and/or Taiwan. Thus, the investment performance of the Fund may be subject to the social, political and economic events occurring in those countries to a greater extent than other countries. As of October 31, 2010, the principal countries in which the Fund invested were Japan, Australia, Taiwan, China and the Republic of Korea. The Fund may also use derivative instruments as discussed below. These derivative instruments will be counted toward the 80% policy discussed above to the extent they have economic characteristics similar to the securities included within that policy.

The Fund’s investment adviser, Invesco Advisers, Inc. (the Adviser), generally invests Fund assets in companies it believes have a high rate of earnings growth potential. It also selects securities which, in its view, possess both on an absolute basis and as compared with other securities around the world, attractive price/earnings, price/cash flow and price/revenue ratios.

The remaining 20% of the Fund’s assets may be invested in equity securities, fixed-income securities and convertible securities of companies located anywhere in the world, as well as 10% of its net assets in securities issued by other investment companies. The Fund’s fixed-income investments may include zero coupon securities, which are purchased at a discount and generally accrue interest, but make no payments until maturity. The fixed-income securities (including zero coupon securities) may be issued or guaranteed by the governments of Australia, New Zealand and countries in Asia. In addition, the Fund may invest in fixed-income securities that are, either alone or in combination with warrants, options or other rights, convertible to the common stock of a company.

The Fund utilizes from time to time forward foreign currency exchange contracts, which are derivatives, in connection with its investments in foreign securities.
Strategy Portfolio Concentration [Text] rr_StrategyPortfolioConcentration The Fund will normally invest at least 80% of its net assets (plus any borrowings for investment purposes) in common stocks (including depositary receipts) and preferred stocks of companies which have a principal place of business in, or which derive a majority of their revenues from business in, Asia, Australia or New Zealand (including emerging market or developing countries).
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 (FDIC) or any other government 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:

Equity Securities. In general, stock and other equity security values fluctuate, and sometimes widely fluctuate, in response to activities specific to the company as well as general market, economic and political conditions. Investments in convertible securities subject the Fund to the risks associated with both fixed-income securities, including credit risk and interest rate risk, and common stocks. A portion of the Fund’s convertible investments may be rated below investment grade.

Growth Investing Risk. Investments in growth-oriented equity securities may have above-average volatility of price movement. The returns on growth securities may or may not move in tandem with the returns on other styles of investing or the overall stock markets.

Foreign and Emerging Market Securities. Investments in foreign markets entail special risks such as currency, political, economic and market risks. There also may be greater market volatility, less reliable financial information, higher transaction and custody costs, decreased market liquidity and less government and exchange regulation associated with investments in foreign markets. The risks of investing in emerging market countries are greater than risks associated with investments in foreign developed countries. Hedging the Fund’s currency risks through forward foreign currency exchange contracts involves the risk of mismatching the Fund’s objectives under a forward foreign currency exchange contract with the value of securities denominated in a particular currency. There is additional risk that such transactions reduce or preclude the opportunity for gain and that currency contracts create exposure to currencies in which the Fund’s securities are not denominated.

Derivatives Risk. Derivatives may be more difficult to purchase, sell or value than other investments and may be subject to market, interest rate, credit, leverage, counterparty and management risks. A fund investing in a derivative could lose more than the cash amount invested or incur higher taxes. Over-the-counter derivatives are also subject to counterparty risk, which is the risk that the other party to the contract will not fulfill its contractual obligation to complete the transaction with the Fund.

Depositary Receipts Risk. Depositary receipts involve many of the same risks as those associated with direct investments 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.

Fixed-Income Securities. All fixed-income securities are subject to two types of risk: credit risk and interest rate risk. Credit risk refers to the possibility that the issuer of a security will be unable to make interest payments and/or repay the principal on its debt. Interest rate risk refers to fluctuations in the value of a fixed-income security resulting from changes in the general level of interest rates. When the general level of interest rates goes up, the prices of most fixed-income securities go down. When the general level of interest rates goes down, the prices of most fixed income securities go up. (Zero coupon securities are typically subject to greater price fluctuations than comparable securities that pay interest.)

Investment Companies. Any Fund investment in an investment company is subject to the underlying risk of that investment company’s portfolio securities. For example, if the investment company held common stocks, the Fund also would be exposed to the risk of investing in common stocks. In addition to the Fund’s fees and expenses, the Fund would bear its share of the investment company’s fees and expenses.

Convertible Securities. The Fund also may invest a portion of its assets in convertible securities, which are securities that generally pay interest and may be converted into common stock. These securities may carry risks associated with both fixed-income securities and common stock. To the extent that a convertible security’s investment value is greater than its conversion value, its price will be likely to increase when interest rates fall and decrease when interest rates rise, as with a fixed-income security. If the conversion value exceeds the investment value, the price of the convertible security will tend to fluctuate directly with the price of the underlying equity security. A portion of these securities may include junk bonds, which have speculative characteristics.

Small- and Mid-Capitalization Risks. Stocks of small and mid sized companies tend to be more vulnerable to adverse developments in the above factors 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 (FDIC) or any other government agency.
Performance Information aimif826644_FundPastPerformanceAbstract  
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, style specific benchmarks and a peer group benchmark comprised of funds with investment objectives and strategies similar to the Fund. The Fund’s (and the predecessor fund’s) past performance (before and after taxes) is not necessarily an indication of its future performance.

Institutional Class shares of the Fund have less than a calendar year of performance; therefore, the returns shown are those of the Fund’s (and the predecessor fund’s) Class A shares, which are not offered in this prospectus. Institutional Class shares would have different returns because, although the shares are invested in the same portfolio of securities, Institutional Class shares have different expenses. The Class A shares’ returns shown for periods prior to June 1, 2010 are those of the Class A shares of the predecessor fund. The predecessor fund was advised by Morgan Stanley Investment Advisors Inc.

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, style specific benchmarks and a peer group benchmark comprised of funds with investment objectives and strategies similar to the Fund.
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture The Fund’s (and the predecessor fund’s) past performance (before and after taxes) is not necessarily an indication of its future performance.
Performance Table Closing [Text Block] rr_PerformanceTableClosingTextBlock Updated performance information is available on the Fund’s Web site at www.invesco.com/us.
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress www.invesco.com/us
Annual Total Returns rr_BarChartTableAbstract  
Bar Chart [Heading] rr_BarChartHeading Annual Total Returns
'01 rr_AnnualReturn2001 (20.28%)
'02 rr_AnnualReturn2002 (9.01%)
'03 rr_AnnualReturn2003 41.59%
'04 rr_AnnualReturn2004 18.47%
'05 rr_AnnualReturn2005 18.68%
'06 rr_AnnualReturn2006 22.24%
'07 rr_AnnualReturn2007 25.13%
'08 rr_AnnualReturn2008 (42.01%)
'09 rr_AnnualReturn2009 35.87%
'10 rr_AnnualReturn2010 15.77%
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock

Class A Shares year-to-date (ended March 31, 2011): (0.60)%

Best Quarter (ended June 30, 2009): 28.10%

Worst Quarter (ended September 30, 2001): (21.87)%
Year to Date Return, Label rr_YearToDateReturnLabel Class A Shares year-to-date
Bar Chart, Year to Date Return, Date rr_BarChartYearToDateReturnDate Mar. 31, 2011
Bar Chart, Year to Date Return rr_BarChartYearToDateReturn (0.60%)
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best Quarter
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Jun. 30, 2009
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 28.10%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst Quarter
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Sep. 30, 2001
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (21.87%)
Average Annual Total Returns rr_AverageAnnualReturnAbstract  
Caption rr_AverageAnnualReturnCaption Average Annual Total Returns (for the periods ended December 31, 2010)
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.
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.
Invesco Pacific Growth Fund | Institutional Class
  
Shareholder Fees rr_ShareholderFeesAbstract  
Shareholder Fees Column [Text] rr_ShareholderFeesColumnName Institutional Class
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
Redemption/Exchange Fee (as a percentage of amount redeemed/exchanged within 31 days of purchase) rr_RedemptionFeeOverRedemption 2.00%
Annual Fund Operating Expenses rr_OperatingExpensesAbstract  
Operating Expenses Column [Text] rr_OperatingExpensesColumnName Institutional Class
Management Fees rr_ManagementFeesOverAssets 0.87%
Distribution and/or Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.45% [1]
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.32% [1]
Example rr_ExpenseExampleAbstract  
Expense Example, By Year, Column [Text] rr_ExpenseExampleByYearColumnName Institutional Class
1 Year rr_ExpenseExampleYear01 134
3 Years rr_ExpenseExampleYear03 418
5 Years rr_ExpenseExampleYear05 723
10 Years rr_ExpenseExampleYear10 1,590
Invesco Pacific Growth Fund | Return Before Taxes | Institutional Class
  
Average Annual Total Returns rr_AverageAnnualReturnAbstract  
Column rr_AverageAnnualReturnColumnName Institutional Class: Inception (05/23/2011) [2]
Label rr_AverageAnnualReturnLabel Return Before Taxes
1 Year rr_AverageAnnualReturnYear01 15.77%
5 Years rr_AverageAnnualReturnYear05 6.89%
10 Years rr_AverageAnnualReturnYear10 7.26%
Inception Date rr_AverageAnnualReturnInceptionDate May 23, 2011
Since Inception rr_AverageAnnualReturnSinceInception  
Invesco Pacific Growth Fund | Return After Taxes on Distributions | Institutional Class
  
Average Annual Total Returns rr_AverageAnnualReturnAbstract  
Column rr_AverageAnnualReturnColumnName Institutional Class: Inception (05/23/2011) [2]
Label rr_AverageAnnualReturnLabel Return After Taxes on Distributions
1 Year rr_AverageAnnualReturnYear01 15.77%
5 Years rr_AverageAnnualReturnYear05 6.89%
10 Years rr_AverageAnnualReturnYear10 7.22%
Inception Date rr_AverageAnnualReturnInceptionDate May 23, 2011
Since Inception rr_AverageAnnualReturnSinceInception  
Invesco Pacific Growth Fund | Return After Taxes on Distributions and Sale of Fund Shares | Institutional Class
  
Average Annual Total Returns rr_AverageAnnualReturnAbstract  
Column rr_AverageAnnualReturnColumnName Institutional Class: Inception (05/23/2011) [2]
Label rr_AverageAnnualReturnLabel Return After Taxes on Distributions and Sale of Fund Shares
1 Year rr_AverageAnnualReturnYear01 10.59%
5 Years rr_AverageAnnualReturnYear05 6.03%
10 Years rr_AverageAnnualReturnYear10 6.43%
Inception Date rr_AverageAnnualReturnInceptionDate May 23, 2011
Since Inception rr_AverageAnnualReturnSinceInception  
Invesco Pacific Growth Fund | MSCI EAFE Index
  
Average Annual Total Returns rr_AverageAnnualReturnAbstract  
Label rr_AverageAnnualReturnLabel MSCI EAFE Index [3]
1 Year rr_AverageAnnualReturnYear01 7.75%
5 Years rr_AverageAnnualReturnYear05 2.46%
10 Years rr_AverageAnnualReturnYear10 3.50%
Performance Table Market Index Changed rr_PerformanceTableMarketIndexChanged Effective February 28, 2011, the Fund has elected to use the MSCI EAFE Index as its broad-based benchmark instead of the MSCI AC Asia Pacific Index because it will better align the Fund's broad-based benchmark with its investment processes and restrictions.
Since Inception rr_AverageAnnualReturnSinceInception  
Invesco Pacific Growth Fund | MSCI AC Asia Pacific Index
  
Average Annual Total Returns rr_AverageAnnualReturnAbstract  
Label rr_AverageAnnualReturnLabel MSCI AC Asia Pacific Index [3]
1 Year rr_AverageAnnualReturnYear01 17.02%
5 Years rr_AverageAnnualReturnYear05 4.51%
10 Years rr_AverageAnnualReturnYear10 6.31%
Performance Table Market Index Changed rr_PerformanceTableMarketIndexChanged Effective February 28, 2011, the Fund has elected to use the MSCI EAFE Index as its broad-based benchmark instead of the MSCI AC Asia Pacific Index because it will better align the Fund's broad-based benchmark with its investment processes and restrictions.
Since Inception rr_AverageAnnualReturnSinceInception  
Invesco Pacific Growth Fund | Custom Pacific Growth Index
  
Average Annual Total Returns rr_AverageAnnualReturnAbstract  
Label rr_AverageAnnualReturnLabel Custom Pacific Growth Index [4]
Index No Deduction for Fees, Expenses, Taxes [Text] rr_IndexNoDeductionForFeesExpensesTaxes (reflects no deductions for fees, expenses or taxes)
1 Year rr_AverageAnnualReturnYear01 17.03%
5 Years rr_AverageAnnualReturnYear05 4.99%
10 Years rr_AverageAnnualReturnYear10 7.47%
Performance Table Market Index Changed rr_PerformanceTableMarketIndexChanged Effective February 28, 2011, the Fund has elected to use the Custom Pacific Growth Index as its style-specific benchmark instead of the MSCI AC Asia Pacific Ex-Japan Index and MSCI Japan Index because it will better align the Fund's style-specific benchmark with its investment processes and restrictions.
Since Inception rr_AverageAnnualReturnSinceInception  
Invesco Pacific Growth Fund | MSCI AC Asia Pacific Ex-Japan Index
  
Average Annual Total Returns rr_AverageAnnualReturnAbstract  
Label rr_AverageAnnualReturnLabel MSCI AC Asia Pacific Ex-Japan Index [4]
1 Year rr_AverageAnnualReturnYear01 18.20%
5 Years rr_AverageAnnualReturnYear05 12.37%
10 Years rr_AverageAnnualReturnYear10 13.84%
Performance Table Market Index Changed rr_PerformanceTableMarketIndexChanged Effective February 28, 2011, the Fund has elected to use the Custom Pacific Growth Index as its style-specific benchmark instead of the MSCI AC Asia Pacific Ex-Japan Index and MSCI Japan Index because it will better align the Fund's style-specific benchmark with its investment processes and restrictions.
Since Inception rr_AverageAnnualReturnSinceInception  
Invesco Pacific Growth Fund | MSCI Japan Index
  
Average Annual Total Returns rr_AverageAnnualReturnAbstract  
Label rr_AverageAnnualReturnLabel MSCI Japan Index [4]
1 Year rr_AverageAnnualReturnYear01 15.44%
5 Years rr_AverageAnnualReturnYear05 (2.45%)
10 Years rr_AverageAnnualReturnYear10 1.01%
Performance Table Market Index Changed rr_PerformanceTableMarketIndexChanged Effective February 28, 2011, the Fund has elected to use the Custom Pacific Growth Index as its style-specific benchmark instead of the MSCI AC Asia Pacific Ex-Japan Index and MSCI Japan Index because it will better align the Fund's style-specific benchmark with its investment processes and restrictions.
Since Inception rr_AverageAnnualReturnSinceInception  
Invesco Pacific Growth Fund | Lipper Pacific Region Funds Index
  
Average Annual Total Returns rr_AverageAnnualReturnAbstract  
Label rr_AverageAnnualReturnLabel Lipper Pacific Region Funds Index
1 Year rr_AverageAnnualReturnYear01 21.13%
5 Years rr_AverageAnnualReturnYear05 6.58%
10 Years rr_AverageAnnualReturnYear10 7.87%
Since Inception rr_AverageAnnualReturnSinceInception  
[1] "Other Expenses" and "Total Annual Fund Operating Expenses" are based on estimated amounts for the current fiscal year.
[2] Institutional Class shares performance shown prior to the inception date is that of the Fund's (and the predecessor fund's) 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. The inception date of the predecessor fund's Class A shares is July 28, 1997.
[3] Effective February 28, 2011, the Fund has elected to use the MSCI EAFE Index as its broad-based benchmark instead of the MSCI AC Asia Pacific Index because it will better align the Fund's broad-based benchmark with its investment processes and restrictions.
[4] Effective February 28, 2011, the Fund has elected to use the Custom Pacific Growth Index as its style-specific benchmark instead of the MSCI AC Asia Pacific Ex-Japan Index and MSCI Japan Index because it will better align the Fund's style-specific benchmark with its investment processes and restrictions.