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Label Element Value
Risk/Return: rr_RiskReturnAbstract  
Registrant Name dei_EntityRegistrantName AIM INVESTMENT FUNDS (INVESCO INVESTMENT FUNDS)
Prospectus Date rr_ProspectusDate Feb. 28, 2013
Supplement [Text Block] aimif_SupplementTextBlock Summary and Statutory Prospectus Supplement dated June 28, 2013
The purpose of this mailing is to provide you with changes to the current Summary and Statutory Prospectuses for Class A, B, C, R and Y shares of the Fund listed below:
Invesco Pacific Growth Fund
The following information replaces in its entirety the information appearing under the heading "Performance Information – Average Annual Total Returns":
"Average Annual Total Returns (for the periods ended December 31, 2012)
                                 
    1   5   10   Since
    Year   Years   Years   Inception
Class A shares: Inception (07/28/1997)     8.25 %     -4.29 %     9.35 %     —  
Class B shares: Inception (11/30/1990)                                
Return Before Taxes     8.68       -4.30       9.25       —  
Return After Taxes on Distributions     8.68       -4.24       9.27       —  
Return After Taxes on Distributions and Sale of Fund Shares     5.64       -3.51       8.30       —  
Class C shares: Inception (07/28/1997)     12.77       -3.87       9.14       —  
Class R shares: Inception (03/31/2008)     14.25       —       —       -1.30 %
Class Y shares: Inception (07/28/1997)     14.82       -2.93       10.23       —  
MSCI EAFE® Index     17.32       -3.69       8.21       —  
MSCI All Country Asia Pacific Index1     16.78       -1.48       9.73       —  
Custom Pacific Growth Index (reflects no deductions for fees, expenses or taxes)1     15.21       -1.57       10.15       —  
Lipper Pacific Region Funds Index     21.50       -0.23       11.15       —  
 
1   The Fund has elected to use the MSCI All Country Asia Pacific Index to represent its style specific benchmark rather than the Custom Pacific Growth Index because the MSCI All Country Asia Pacific Index more closely reflects the performance of the types of securities in which the Fund invests.
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 B shares only and after-tax returns for other classes will vary." 

Summary and Statutory Prospectus Supplement dated June 28, 2013
The purpose of this mailing is to provide you with changes to the current Summary and Statutory Prospectuses for Class R5 shares of the Fund listed below:
Invesco Pacific Growth Fund
The following information replaces in its entirety the information appearing under the heading "Performance Information – Average Annual Total Returns":
"Average Annual Total Returns (for the periods ended December 31, 2012)
                         
    1   5   10
    Year   Years   Years
Class R5 shares1: Inception (05/23/2011)                        
Return Before Taxes     15.04 %     -3.06 %     10.05 %
Return After Taxes on Distributions     14.91       -3.09       10.03  
Return After Taxes on Distributions and Sale of Fund Shares     9.94       -2.48       9.05  
MSCI EAFE® Index     17.32       -3.69       8.21  
MSCI All Country Asia Pacific Index2     16.78       -1.48       9.73  
Custom Pacific Growth Index (reflects no deductions for fees, expenses or taxes)2     15.21       -1.57       10.15  
Lipper Pacific Region Funds Index     21.50       -0.23       11.15  
 
1   Class R5 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.
 
2   The Fund has elected to use the MSCI All Country Asia Pacific Index to represent its style specific benchmark rather than the Custom Pacific Growth Index because the MSCI All Country Asia Pacific Index more closely reflects the performance of the types of securities in which the Fund invests.
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."
Class A, B, C, R and Y | INVESCO PACIFIC GROWTH FUND
  
Risk/Return: rr_RiskReturnAbstract  
Supplement [Text Block] aimif_SupplementTextBlock Summary and Statutory Prospectus Supplement dated June 28, 2013
The purpose of this mailing is to provide you with changes to the current Summary and Statutory Prospectuses for Class A, B, C, R and Y shares of the Fund listed below:
Invesco Pacific Growth Fund
The following information replaces in its entirety the information appearing under the heading "Performance Information – Average Annual Total Returns":
"Average Annual Total Returns (for the periods ended December 31, 2012)
                                 
    1   5   10   Since
    Year   Years   Years   Inception
Class A shares: Inception (07/28/1997)     8.25 %     -4.29 %     9.35 %     —  
Class B shares: Inception (11/30/1990)                                
Return Before Taxes     8.68       -4.30       9.25       —  
Return After Taxes on Distributions     8.68       -4.24       9.27       —  
Return After Taxes on Distributions and Sale of Fund Shares     5.64       -3.51       8.30       —  
Class C shares: Inception (07/28/1997)     12.77       -3.87       9.14       —  
Class R shares: Inception (03/31/2008)     14.25       —       —       -1.30 %
Class Y shares: Inception (07/28/1997)     14.82       -2.93       10.23       —  
MSCI EAFE® Index     17.32       -3.69       8.21       —  
MSCI All Country Asia Pacific Index1     16.78       -1.48       9.73       —  
Custom Pacific Growth Index (reflects no deductions for fees, expenses or taxes)1     15.21       -1.57       10.15       —  
Lipper Pacific Region Funds Index     21.50       -0.23       11.15       —  
 
1   The Fund has elected to use the MSCI All Country Asia Pacific Index to represent its style specific benchmark rather than the Custom Pacific Growth Index because the MSCI All Country Asia Pacific Index more closely reflects the performance of the types of securities in which the Fund invests.
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 B shares only and after-tax returns for other classes will vary." 
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 B 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 B shares only and after-tax returns for other classes will vary.
Class A, B, C, R and Y | INVESCO PACIFIC GROWTH FUND | Class A shares:
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 8.25%
5 Years rr_AverageAnnualReturnYear05 (4.29%)
10 Years rr_AverageAnnualReturnYear10 9.35%
Since Inception rr_AverageAnnualReturnSinceInception   
Inception Date rr_AverageAnnualReturnInceptionDate Jul. 28, 1997
Class A, B, C, R and Y | INVESCO PACIFIC GROWTH FUND | Class B shares:
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 8.68%
5 Years rr_AverageAnnualReturnYear05 (4.30%)
10 Years rr_AverageAnnualReturnYear10 9.25%
Since Inception rr_AverageAnnualReturnSinceInception   
Inception Date rr_AverageAnnualReturnInceptionDate Nov. 30, 1990
Class A, B, C, R and Y | INVESCO PACIFIC GROWTH FUND | Class C shares:
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 12.77%
5 Years rr_AverageAnnualReturnYear05 (3.87%)
10 Years rr_AverageAnnualReturnYear10 9.14%
Since Inception rr_AverageAnnualReturnSinceInception   
Inception Date rr_AverageAnnualReturnInceptionDate Jul. 28, 1997
Class A, B, C, R and Y | INVESCO PACIFIC GROWTH FUND | Class R shares:
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 14.25%
5 Years rr_AverageAnnualReturnYear05   
10 Years rr_AverageAnnualReturnYear10   
Since Inception rr_AverageAnnualReturnSinceInception (1.30%)
Inception Date rr_AverageAnnualReturnInceptionDate Mar. 31, 2008
Class A, B, C, R and Y | INVESCO PACIFIC GROWTH FUND | Class Y shares:
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 14.82%
5 Years rr_AverageAnnualReturnYear05 (2.93%)
10 Years rr_AverageAnnualReturnYear10 10.23%
Since Inception rr_AverageAnnualReturnSinceInception   
Inception Date rr_AverageAnnualReturnInceptionDate Jul. 28, 1997
Class A, B, C, R and Y | INVESCO PACIFIC GROWTH FUND | Return After Taxes on Distributions | Class B shares:
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 8.68%
5 Years rr_AverageAnnualReturnYear05 (4.24%)
10 Years rr_AverageAnnualReturnYear10 9.27%
Since Inception rr_AverageAnnualReturnSinceInception   
Inception Date rr_AverageAnnualReturnInceptionDate Nov. 30, 1990
Class A, B, C, R and Y | INVESCO PACIFIC GROWTH FUND | Return After Taxes on Distributions and Sale of Fund Shares | Class B shares:
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 5.64%
5 Years rr_AverageAnnualReturnYear05 (3.51%)
10 Years rr_AverageAnnualReturnYear10 8.30%
Since Inception rr_AverageAnnualReturnSinceInception   
Inception Date rr_AverageAnnualReturnInceptionDate Nov. 30, 1990
Class A, B, C, R and Y | INVESCO PACIFIC GROWTH 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%
Since Inception rr_AverageAnnualReturnSinceInception   
Class A, B, C, R and Y | INVESCO PACIFIC GROWTH FUND | MSCI All Country Asia Pacific Index
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 16.78% [1]
5 Years rr_AverageAnnualReturnYear05 (1.48%) [1]
10 Years rr_AverageAnnualReturnYear10 9.73% [1]
Since Inception rr_AverageAnnualReturnSinceInception    [1]
Class A, B, C, R and Y | INVESCO PACIFIC GROWTH FUND | Custom Pacific Growth Index (reflects no deductions for fees, expenses or taxes)
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 15.21% [1]
5 Years rr_AverageAnnualReturnYear05 (1.57%) [1]
10 Years rr_AverageAnnualReturnYear10 10.15% [1]
Since Inception rr_AverageAnnualReturnSinceInception    [1]
Class A, B, C, R and Y | INVESCO PACIFIC GROWTH FUND | Lipper Pacific Region Funds Index
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 21.50%
5 Years rr_AverageAnnualReturnYear05 (0.23%)
10 Years rr_AverageAnnualReturnYear10 11.15%
Since Inception rr_AverageAnnualReturnSinceInception   
Class R5 | INVESCO PACIFIC GROWTH FUND
  
Risk/Return: rr_RiskReturnAbstract  
Supplement [Text Block] aimif_SupplementTextBlock Summary and Statutory Prospectus Supplement dated June 28, 2013
The purpose of this mailing is to provide you with changes to the current Summary and Statutory Prospectuses for Class R5 shares of the Fund listed below:
Invesco Pacific Growth Fund
The following information replaces in its entirety the information appearing under the heading "Performance Information – Average Annual Total Returns":
"Average Annual Total Returns (for the periods ended December 31, 2012)
                         
    1   5   10
    Year   Years   Years
Class R5 shares1: Inception (05/23/2011)                        
Return Before Taxes     15.04 %     -3.06 %     10.05 %
Return After Taxes on Distributions     14.91       -3.09       10.03  
Return After Taxes on Distributions and Sale of Fund Shares     9.94       -2.48       9.05  
MSCI EAFE® Index     17.32       -3.69       8.21  
MSCI All Country Asia Pacific Index2     16.78       -1.48       9.73  
Custom Pacific Growth Index (reflects no deductions for fees, expenses or taxes)2     15.21       -1.57       10.15  
Lipper Pacific Region Funds Index     21.50       -0.23       11.15  
 
1   Class R5 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.
 
2   The Fund has elected to use the MSCI All Country Asia Pacific Index to represent its style specific benchmark rather than the Custom Pacific Growth Index because the MSCI All Country Asia Pacific Index more closely reflects the performance of the types of securities in which the Fund invests.
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 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 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."
Class R5 | INVESCO PACIFIC GROWTH FUND | Class R5 shares:
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 15.04% [2]
5 Years rr_AverageAnnualReturnYear05 (3.06%) [2]
10 Years rr_AverageAnnualReturnYear10 10.05% [2]
Inception Date rr_AverageAnnualReturnInceptionDate May 23, 2011 [2]
Class R5 | INVESCO PACIFIC GROWTH FUND | Return After Taxes on Distributions | Class R5 shares:
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 14.91% [2]
5 Years rr_AverageAnnualReturnYear05 (3.09%) [2]
10 Years rr_AverageAnnualReturnYear10 10.03% [2]
Inception Date rr_AverageAnnualReturnInceptionDate May 23, 2011 [2]
Class R5 | INVESCO PACIFIC GROWTH FUND | Return After Taxes on Distributions and Sale of Fund Shares | Class R5 shares:
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 9.94% [2]
5 Years rr_AverageAnnualReturnYear05 (2.48%) [2]
10 Years rr_AverageAnnualReturnYear10 9.05% [2]
Inception Date rr_AverageAnnualReturnInceptionDate May 23, 2011 [2]
Class R5 | INVESCO PACIFIC GROWTH 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 R5 | INVESCO PACIFIC GROWTH FUND | MSCI All Country Asia Pacific Index
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 16.78% [1]
5 Years rr_AverageAnnualReturnYear05 (1.48%) [1]
10 Years rr_AverageAnnualReturnYear10 9.73% [1]
Class R5 | INVESCO PACIFIC GROWTH FUND | Custom Pacific Growth Index (reflects no deductions for fees, expenses or taxes)
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 15.21% [1]
5 Years rr_AverageAnnualReturnYear05 (1.57%) [1]
10 Years rr_AverageAnnualReturnYear10 10.15% [1]
Class R5 | INVESCO PACIFIC GROWTH FUND | Lipper Pacific Region Funds Index
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 21.50%
5 Years rr_AverageAnnualReturnYear05 (0.23%)
10 Years rr_AverageAnnualReturnYear10 11.15%
[1] The Fund has elected to use the MSCI All Country Asia Pacific Index to represent its style specific benchmark rather than the Custom Pacific Growth Index because the MSCI All Country Asia Pacific Index more closely reflects the performance of the types of securities in which the Fund invests.
[2] Class R5 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.