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Label Element Value
Risk/Return: rr_RiskReturnAbstract  
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock

Investment Objective. The Fund seeks capital appreciation.

Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock

Fees and Expenses of the Fund. This table describes the fees and expenses that you may pay if you buy and hold or redeem shares of the Fund. You may qualify for sales charge discounts if you (or you and your spouse) invest, or agree to invest in the future, at least $25,000 in certain funds in the Oppenheimer family of funds. More information about these and other discounts is available from your financial professional and in the section "About Your Account" beginning on page 10 of the prospectus and in the sections "How to Buy Shares" beginning on page 54 and "Appendix A" in the Fund's Statement of Additional Information.
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)

 [1]
Expense Breakpoint, Minimum Investment Required [Amount] rr_ExpenseBreakpointMinimumInvestmentRequiredAmount $ 25,000
Expense Breakpoint Discounts [Text] rr_ExpenseBreakpointDiscounts You may qualify for sales charge discounts if you (or you and your spouse) invest, or agree to invest in the future, at least $25,000 in certain funds in the Oppenheimer family of funds.
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock

Example. The following 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 a class of shares of the Fund for the time periods indicated. 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 expenses would be as follows:
Expense Example by, Year, Caption [Text] rr_ExpenseExampleByYearCaption

If shares are redeemed

Expense Example, No Redemption, By Year, Caption [Text] rr_ExpenseExampleNoRedemptionByYearCaption

If shares are not redeemed

Portfolio Turnover, Rate rr_PortfolioTurnoverRate 61.00%
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock

Portfolio Turnover. 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 the 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 61% of the average value of its portfolio.
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock

Principal Investment Strategies. The Fund mainly invests in common stocks of "growth companies." Growth companies are companies whose earnings and stock prices are expected to increase at a faster rate than the overall market. These may be newer companies or established companies of any capitalization range that the portfolio manager believes may appreciate in value over the long term. Currently, the Fund primarily focuses on established companies that are similar in size to companies in the S&P 500 Index or the Russell 1000 Growth Index. The Fund primarily invests in securities of U.S. issuers but may also invest in foreign securities. The portfolio manager looks for growth companies with stock prices that they believe are reasonable in relation to overall stock market valuations. In seeking broad diversification of the Fund's portfolio among industries and market sectors, the portfolio manager focuses on a number of factors that may vary in particular cases and over time. Currently, the portfolio manager looks for:

  • companies in business areas that have above-average growth potential

  • companies with growth rates that the portfolio manager believes are sustainable over time

  • stocks with reasonable valuations relative to their growth potential.

The Fund may sell the stocks of companies that the portfolio manager believes no longer meet the above criteria, but is not required to do so.
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock

Principal Risks. The price of the Fund's shares can go up and down substantially. The value of the Fund's investments may change because of broad changes in the markets in which the Fund invests or because of poor investment selection, which could cause the Fund to underperform other funds with similar investment objectives. There is no assurance that the Fund will achieve its investment objective. When you redeem your shares, they may be worth more or less than what you paid for them. These risks mean that you can lose money by investing in the Fund.

Main Risks of Investing in Stock. The value of the Fund's portfolio may be affected by changes in the stock markets. Stock markets may experience significant short-term volatility and may fall sharply at times. Different stock markets may behave differently from each other and U.S. stock markets may move in the opposite direction from one or more foreign stock markets.

The prices of individual stocks generally do not all move in the same direction at the same time and a variety of factors can affect the price of a particular company's stock. These factors may include, but are not limited to: poor earnings reports, a loss of customers, litigation against the company, general unfavorable performance of the company's sector or industry, or changes in government regulations affecting the company or its industry.

At times, the Fund may emphasize investments in a particular industry or economic or market sector. To the extent that the Fund increases its emphasis on investments in a particular industry or sector, the value of its investments may fluctuate more in response to events affecting that industry or sector, such as changes in economic conditions, government regulations, availability of basic resources or supplies, or other events that affect that industry or sector more than others.

Main Risks of Growth Investing. If a growth company's earnings or stock price fails to increase as anticipated, or if its business plans do not produce the expected results, its securities may decline sharply. Growth companies may be newer or smaller companies that may experience greater stock price fluctuations and risks of loss than larger, more established companies. Newer growth companies tend to retain a large part of their earnings for research, development or investments in capital assets. Therefore, they may not pay any dividends for some time. Growth investing has gone in and out of favor during past market cycles and is likely to continue to do so. During periods when growth investing is out of favor or when markets are unstable, it may be more difficult to sell growth company securities at an acceptable price. Growth stocks may also be more volatile than other securities because of investor speculation.

Who Is The Fund Designed For? The Fund is designed primarily for investors seeking capital appreciation over the long term. Those investors should be willing to assume the risks of short-term share price fluctuations that are typical for a fund focusing on stocks. Because of its focus on long-term growth, the Fund may be more appropriate for investors with longer term investment goals. The Fund is not designed for investors needing current income. The Fund is not a complete investment program. You should carefully consider your own investment goals and risk tolerance before investing in the Fund.

An investment in the Fund is not a deposit of any bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.

Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock

The Fund's Past Performance. The bar chart and table below provide some indication of the risks of investing in the Fund by showing changes in the Fund's performance (for Class A shares) from calendar year to calendar year and by showing how the Fund's average annual returns for the periods of time shown in the table compare with those of a broad measure of market performance. The Fund's past investment performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. More recent performance information is available by calling the toll-free number on the back of this prospectus and on the Fund's website: https://www.oppenheimerfunds.com/fund/CapitalAppreciationFund

Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock

Sales charges and taxes are not included and the returns would be lower if they were. During the period shown, the highest return for a calendar quarter was 18.94% (2nd Qtr 09) and the lowest was -28.10% (4th Qtr 08). For the period from January 1, 2013 to September 30, 2013 the cumulative return before sales charges and taxes was 16.79%.
Performance Table Narrative rr_PerformanceTableNarrativeTextBlock

The following table shows the average annual total returns for each class of the Fund's shares. After-tax returns are calculated using the highest individual federal marginal income tax rates and do not reflect the impact of state or local taxes. Your actual after-tax returns, depending on your individual tax situation, 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 only one class and after-tax returns for other classes will vary.
Risk Lose Money [Text] rr_RiskLoseMoney The price of the Fund's shares can go up and down substantially. The value of the Fund's investments may change because of broad changes in the markets in which the Fund invests or because of poor investment selection, which could cause the Fund to underperform other funds with similar investment objectives. There is no assurance that the Fund will achieve its investment objective. When you redeem your shares, they may be worth more or less than what you paid for them. These risks mean that you can lose money by investing in the Fund.
Risk Not Insured Depository Institution [Text] rr_RiskNotInsuredDepositoryInstitution An investment in the Fund is not a deposit of any bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Performance Table Heading rr_PerformanceTableHeading

Average Annual Total Returns for the periods ended December 31, 2012
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture The Fund's past investment performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future.
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress https://www.oppenheimerfunds.com/fund/CapitalAppreciationFund
Expenses Restated to Reflect Current [Text] rr_ExpensesRestatedToReflectCurrent Expenses have been restated to reflect current fees.
Russell 1000 Growth Index
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 15.26%
5 Years (or life of class, if less) rr_AverageAnnualReturnYear05 3.12%
10 Years (or life of class, if less) rr_AverageAnnualReturnYear10 7.52%
Russell 1000 Growth Index (reflects no deduction for fees, expenses or taxes)
  
Risk/Return: rr_RiskReturnAbstract  
5 Years (or life of class, if less) rr_AverageAnnualReturnYear05 15.26% [2]
S&P 500 Index
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 15.99%
5 Years (or life of class, if less) rr_AverageAnnualReturnYear05 1.66%
10 Years (or life of class, if less) rr_AverageAnnualReturnYear10 7.10%
S&P 500 Index (reflects no deduction for fees, expenses or taxes)
  
Risk/Return: rr_RiskReturnAbstract  
5 Years (or life of class, if less) rr_AverageAnnualReturnYear05 15.99% [2]
Class A
  
Risk/Return: rr_RiskReturnAbstract  
Maximum Sales Charge (Load) imposed on purchases (as % of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 5.75%
Maximum Deferred Sales Charge (Load) (as % of the lower of original offering price or redemption proceeds) rr_MaximumDeferredSalesChargeOverOther none
Management Fees rr_ManagementFeesOverAssets 0.60%
Distribution and/or Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.23%
Other Expenses rr_OtherExpensesOverAssets 0.23%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.06%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 677
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 894
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,129
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 1,801
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 677
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 894
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 1,129
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 1,801
Annual Return 2003 rr_AnnualReturn2003 29.46%
Annual Return 2004 rr_AnnualReturn2004 6.46%
Annual Return 2005 rr_AnnualReturn2005 4.70%
Annual Return 2006 rr_AnnualReturn2006 7.51%
Annual Return 2007 rr_AnnualReturn2007 13.76%
Annual Return 2008 rr_AnnualReturn2008 (45.90%)
Annual Return 2009 rr_AnnualReturn2009 43.58%
Annual Return 2010 rr_AnnualReturn2010 9.14%
Annual Return 2011 rr_AnnualReturn2011 (1.57%)
Annual Return 2012 rr_AnnualReturn2012 13.69%
Year to Date Return, Label rr_YearToDateReturnLabel For the period from January 1, 2013 to September 30, 2013 the cumulative return before sales charges and taxes was 16.79%.
Bar Chart, Year to Date Return rr_BarChartYearToDateReturn 16.79%
Bar Chart, Year to Date Return, Date rr_BarChartYearToDateReturnDate Sep. 30, 2013
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel the highest return for a calendar quarter was 18.94% (2nd Qtr 09)
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 18.94%
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Jun. 30, 2009
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel the lowest was -28.10% (4th Qtr 08)
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (28.10%)
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2008
Inception Date rr_AverageAnnualReturnInceptionDate Jan. 22, 1981
1 Year rr_AverageAnnualReturnYear01 7.15%
5 Years (or life of class, if less) rr_AverageAnnualReturnYear05 (2.21%)
10 Years (or life of class, if less) rr_AverageAnnualReturnYear10 4.67%
Class A | Return After Taxes on Distributions
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 7.05%
5 Years (or life of class, if less) rr_AverageAnnualReturnYear05 (2.23%)
10 Years (or life of class, if less) rr_AverageAnnualReturnYear10 4.60%
Class A | Return After Taxes on Distributions and Sale of Fund Shares
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 4.78%
5 Years (or life of class, if less) rr_AverageAnnualReturnYear05 (1.87%)
10 Years (or life of class, if less) rr_AverageAnnualReturnYear10 4.07%
Class B
  
Risk/Return: rr_RiskReturnAbstract  
Maximum Sales Charge (Load) imposed on purchases (as % of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum Deferred Sales Charge (Load) (as % of the lower of original offering price or redemption proceeds) rr_MaximumDeferredSalesChargeOverOther 5.00%
Management Fees rr_ManagementFeesOverAssets 0.60%
Distribution and/or Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.99%
Other Expenses rr_OtherExpensesOverAssets 0.23%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.82%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 687
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 878
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,194
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 1,768
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 187
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 578
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 994
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 1,768
Inception Date rr_AverageAnnualReturnInceptionDate Nov. 01, 1995
1 Year rr_AverageAnnualReturnYear01 7.73%
5 Years (or life of class, if less) rr_AverageAnnualReturnYear05 (2.25%)
10 Years (or life of class, if less) rr_AverageAnnualReturnYear10 4.78%
Class C
  
Risk/Return: rr_RiskReturnAbstract  
Maximum Sales Charge (Load) imposed on purchases (as % of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum Deferred Sales Charge (Load) (as % of the lower of original offering price or redemption proceeds) rr_MaximumDeferredSalesChargeOverOther 1.00%
Management Fees rr_ManagementFeesOverAssets 0.60%
Distribution and/or Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.99%
Other Expenses rr_OtherExpensesOverAssets 0.23%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.82%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 287
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 578
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 994
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 2,156
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 187
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 578
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 994
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 2,156
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 01, 1993
1 Year rr_AverageAnnualReturnYear01 11.81%
5 Years (or life of class, if less) rr_AverageAnnualReturnYear05 (1.81%)
10 Years (or life of class, if less) rr_AverageAnnualReturnYear10 4.48%
Class N
  
Risk/Return: rr_RiskReturnAbstract  
Maximum Sales Charge (Load) imposed on purchases (as % of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum Deferred Sales Charge (Load) (as % of the lower of original offering price or redemption proceeds) rr_MaximumDeferredSalesChargeOverOther 1.00%
Management Fees rr_ManagementFeesOverAssets 0.60%
Distribution and/or Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.49%
Other Expenses rr_OtherExpensesOverAssets 0.23%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.32%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 235
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 421
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 728
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 1,601
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 135
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 421
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 728
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 1,601
Inception Date rr_AverageAnnualReturnInceptionDate Mar. 01, 2001
1 Year rr_AverageAnnualReturnYear01 12.41%
5 Years (or life of class, if less) rr_AverageAnnualReturnYear05 (1.29%)
10 Years (or life of class, if less) rr_AverageAnnualReturnYear10 4.98%
Class Y
  
Risk/Return: rr_RiskReturnAbstract  
Maximum Sales Charge (Load) imposed on purchases (as % of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum Deferred Sales Charge (Load) (as % of the lower of original offering price or redemption proceeds) rr_MaximumDeferredSalesChargeOverOther none
Management Fees rr_ManagementFeesOverAssets 0.60%
Distribution and/or Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.23%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 0.83%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 85
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 266
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 462
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 1,030
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 85
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 266
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 462
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 1,030
Inception Date rr_AverageAnnualReturnInceptionDate Nov. 03, 1997
1 Year rr_AverageAnnualReturnYear01 14.14%
5 Years (or life of class, if less) rr_AverageAnnualReturnYear05 (0.64%)
10 Years (or life of class, if less) rr_AverageAnnualReturnYear10 5.70%
Class I
  
Risk/Return: rr_RiskReturnAbstract  
Maximum Sales Charge (Load) imposed on purchases (as % of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum Deferred Sales Charge (Load) (as % of the lower of original offering price or redemption proceeds) rr_MaximumDeferredSalesChargeOverOther none
Management Fees rr_ManagementFeesOverAssets 0.60%
Distribution and/or Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.04%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 0.64%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 66
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 206
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 358
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 801
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 66
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 206
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 358
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 $ 801
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 29, 2011
1 Year rr_AverageAnnualReturnYear01 14.25%
5 Years (or life of class, if less) rr_AverageAnnualReturnYear05 13.82%
10 Years (or life of class, if less) rr_AverageAnnualReturnYear10   
[1] Expenses have been restated to reflect current fees.
[2] As of 12/31/11.