485BPOS

Registration No. 2-33043

File No. 811-1512

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, DC 20549

FORM N-1A

REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933	x
Pre-Effective Amendment No. _____	o
Post-Effective Amendment No. 71	x

and/or

REGISTRATION STATEMENT UNDER THE INVESTMENT COMPANY ACT OF 1940	x
Amendment No. 55	x

OPPENHEIMER CAPITAL INCOME FUND
(Exact Name of Registrant as Specified in Charter)

6803 South Tucson Way, Centennial, CO 80112-3924

(Address of Principal Executive Offices)       (Zip Code)

(303) 768-3200

(Registrant’s Telephone Number, including Area Code)

Arthur S. Gabinet, Esq.

OppenheimerFunds, Inc.

Two World Financial Center, 225 Liberty Street,

New York, NY 10281-1008

(Name and Address of Agent for Service)

It is proposed that this filing will become effective (check appropriate box):

x immediately upon filing pursuant to paragraph (b)

o on __________ pursuant to paragraph (b)

o 60 days after filing pursuant to paragraph (a)(1)

o on _______________ pursuant to paragraph (a)(1)

o 75 days after filing pursuant to paragraph (a)(2)

o on _______________ pursuant to paragraph (a)(2) of Rule 485.

If appropriate, check the following box:

o This post-effective amendment designates a new effective date for a previously filed post-effective amendment.

SIGNATURES
 

Pursuant to the requirements of the Securities Act of 1933 and the Investment Company Act of 1940, the Registrant certifies that it meets all the requirements for effectiveness of this Registration Statement pursuant to Rule 485(b) under the Securities Act of 1933 and has duly caused this Registration Statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of New York and State of New York on the 13th day of January, 2012.

Oppenheimer Capital Income Fund
	By:	William F. Glavin, Jr.*
		William F. Glavin, Jr.*, President, Principal Executive Officer and Trustee

Pursuant to the requirements of the Securities Act of 1933, this Registration Statement has been signed below by the following persons in the capacities on the dates indicated:

Signatures	Title	Date
William L. Armstrong*	Chairman of the	January 13, 2012
William L. Armstrong	Board of Trustees
William F. Glavin, Jr.*	President, Principal Executive	January 13, 2012
William F. Glavin, Jr.	Officer and Trustee
Brian W. Wixted*	Treasurer, Principal	January 13, 2012
Brian W. Wixted	Financial & Accounting Officer
Edward L. Cameron*	Trustee	January 13, 2012
Edward L. Cameron
Jon S. Fossel*	Trustee	January 13, 2012
Jon S. Fossel
Sam Freedman*	Trustee	January 13, 2012
Sam Freedman
Beverly L. Hamilton*	Trustee	January 13, 2012
Beverly L. Hamilton
Robert J. Malone*	Trustee	January 13, 2012
Robert J. Malone
F. William Marshall, Jr.*	Trustee	January 13, 2012
F. William Marshall, Jr.

*By:	/s/ Mitchell J. Lindauer
	Mitchell J. Lindauer, Attorney-in-Fact

EXHIBIT INDEX

Exhibit No.	Description
Ex-101.INS	XBRL Instance Document
Ex-101.SCH	XBRL Taxonomy Extension Schema Document
Ex-101.CAL	XBRL Taxonomy Extension Calculation Linkbase Document
Ex-101.DEF	XBRL Taxonomy Extension Definition Linkbase
Ex-101.LAB	XBRL Taxonomy Extension Labels Linkbase
Ex-101.PRE	XBRL Taxonomy Extension Presentation Linkbase Document

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Annual Total Returns (dei_DocumentInformationDocumentAxis, (Oppenheimer Capital Income Fund), Class A Shares)	0 Months Ended
	Dec. 29, 2011
(Oppenheimer Capital Income Fund) | Class A Shares
Bar Chart Table:
Annual Return 2001	(0.19%)
Annual Return 2002	(16.15%)
Annual Return 2003	33.47%
Annual Return 2004	10.28%
Annual Return 2005	2.43%
Annual Return 2006	15.16%
Annual Return 2007	(1.85%)
Annual Return 2008	(37.05%)
Annual Return 2009	18.10%
Annual Return 2010	11.63%

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(Oppenheimer Capital Income Fund)

Investment Objective. The Fund's primary objective is to seek as much current income as is compatible with prudent investment. The Fund has a secondary objective to conserve principal while providing an opportunity for capital appreciation.

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 15 of the prospectus and in the sections "How to Buy Shares" beginning on page 58 and "Appendix A" in the Fund's Statement of Additional Information.

Shareholder Fees (fees paid directly from your investment)

Shareholder Fees (Oppenheimer Capital Income Fund)	Class A Shares	Class B Shares	Class C Shares	Class N Shares	Class Y Shares
Maximum Sales Charge (Load) imposed on purchases (as % of offering price)	5.75%	none	none	none	none
Maximum Deferred Sales Charge (Load) (as % of the lower of original offering price or redemption proceeds)	none	5.00%	1.00%	1.00%	none

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses (Oppenheimer Capital Income Fund)		Class A Shares	Class B Shares	Class C Shares	Class N Shares	Class Y Shares
Management Fees	[1]	0.56%	0.56%	0.56%	0.56%	0.56%
Distribution and/or Service (12b-1) Fees		0.23%	1.00%	1.00%	0.48%	none
Acquired Fund Fees and Expenses		0.03%	0.03%	0.03%	0.03%	0.03%
Other Expenses of the Fund	[2]	0.21%	0.57%	0.32%	0.32%	0.04%
Other Expenses of the Subsidiary	[3]	none	none	none	none	none
Total Other Expenses		0.21%	0.57%	0.32%	0.32%	0.04%
Total Annual Fund Operating Expenses		1.03%	2.16%	1.91%	1.39%	0.63%
Fee Waiver and Expense Reimbursement	[4]	(0.05%)	(0.17%)	(0.05%)	(0.05%)	(0.05%)
Total Annual Fund Operating Expenses After Fee Waiver and Expense Reimbursement		0.98%	1.99%	1.86%	1.34%	0.58%

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:

If shares are redeemed

Expense Example (Oppenheimer Capital Income Fund) (USD $)	1 Year	3 Years	5 Years	10 Years
Class A Shares	670	881	1,109	1,764
Class B Shares	704	967	1,356	1,942
Class C Shares	291	601	1,037	2,250
Class N Shares	237	438	761	1,676
Class Y Shares	59	197	347	784

If shares are not redeemed

Expense Example, No Redemption (Oppenheimer Capital Income Fund) (USD $)	1 Year	3 Years	5 Years	10 Years
Class A Shares	670	881	1,109	1,764
Class B Shares	204	667	1,156	1,942
Class C Shares	191	601	1,037	2,250
Class N Shares	137	438	761	1,676
Class Y Shares	59	197	347	784

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 92% of the average value of its portfolio.

Principal Investment Strategies. The Fund invests in both equity and debt securities of domestic and foreign issuers in different capitalization ranges and in developed or developing countries. Under normal market conditions, the Fund invests at least 65% of its total assets in equity and debt securities that are expected to generate income. The percentages of equity and debt securities the Fund holds may vary from time to time. There is no limit on the Fund's investments in foreign securities.

Equity Securities. In selecting equity securities, the portfolio manager mainly uses a value-oriented investing style. A security may be undervalued because the market does not yet recognize its potential or the issuer is temporarily out of favor. The Fund seeks to realize gains when other investors recognize the real or prospective worth of the security. Value securities may offer higher than average dividends and the Fund may invest in equity securities to seek both current income and capital growth. The portfolio manager typically looks for securities that: have high current income, are believed to have substantial earnings possibilities, have low price/earnings ratios, and have a low price relative to the underlying value of the issuer's assets, earnings, cash flow or other factors.

Debt Securities. The portfolio manager looks for high current yields and typically searches for corporate and government debt securities that offer: attractive relative value, more income than U.S. treasury obligations, a balance of risk and return, high income potential and portfolio diversification.

The Fund's debt securities may be rated by a nationally recognized statistical rating organization or may be unrated. The Fund can invest up to 25% of its total assets below investment grade securities, also referred to as "junk bonds," but cannot invest more than 10% of its assets in below investment grade non-convertible securities. "Investment grade" securities are rated in one of the top four rating categories.

Derivative Securities. The Fund may also use derivative instruments to seek income or to try to manage investment risks, including: options, futures, swaps, "structured" notes, mortgage-related securities and equity-linked debt securities.

The Fund may sell securities that no longer meet the above criteria.

The Fund has established a Cayman Islands company that is wholly-owned and controlled by the Fund (the "Subsidiary"). The Fund may invest up to 25% of its total assets in the Subsidiary. The Subsidiary invests primarily in commodity-linked derivatives (including commodity futures, financial futures, options and swap contracts) and exchange-traded funds related to gold or other special minerals ("Gold ETFs"). The Subsidiary may also invest in certain fixed-income securities and other investments that may serve as margin or collateral for its derivatives positions. Investments in the Subsidiary are intended to provide the Fund with exposure to commodities market returns within the limitations of the federal tax requirements that apply to the Fund. The Fund applies its investment restrictions and compliance policies and procedures, on a look-through basis, to the Subsidiary. The Fund's investment in the Subsidiary may vary based on the portfolio manager's use of different types of commodity-linked derivatives, fixed-income securities, Gold ETFs, and other investments. Since the Fund may invest a substantial portion of its assets in the Subsidiary, which may hold certain of the investments described in this prospectus, the Fund may be considered to be investing indirectly in those investments through its Subsidiary. Therefore, references in this prospectus to investments by the Fund also may be deemed to include the Fund's indirect investments through the Subsidiary.

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 security 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 Equity Securities. Stocks and other equity securities fluctuate in price. The value of the Fund's portfolio may be affected by changes in the equity markets generally. Equity markets may experience significant short-term volatility and may fall sharply at times. Different markets may behave differently from each other and U.S. equity markets may move in the opposite direction from one or more foreign markets.

The prices of individual equity securities 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 securities. These factors may include: 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.

Main Risks of Value Investing. Value investing entails the risk that if the market does not recognize that the Fund's securities are undervalued, the prices of those securities might not appreciate as anticipated. A value approach could also result in fewer investments that increase rapidly during times of market gains and could cause the Fund to underperform funds that use a growth or non-value approach to investing. Value investing has gone in and out of favor during past market cycles and when value investing is out of favor or when markets are unstable, the securities of "value" companies may underperform the securities of "growth" companies.

Main Risks of Debt Securities. Debt securities may be subject to credit risk, interest rate risk, prepayment risk and extension risk. Credit risk is the risk that the issuer of a security might not make interest and principal payments on the security as they become due. If an issuer fails to pay interest or repay principal, the Fund's income or share value might be reduced. Adverse news about an issuer or a downgrade in an issuer's credit rating, for any reason, can also reduce the market value of the issuer's securities. Interest rate risk is the risk that when prevailing interest rates fall, the values of already-issued debt securities generally rise; and when prevailing interest rates rise, the values of already-issued debt securities generally fall, and they may be worth less than the amount the Fund paid for them. When interest rates change, the values of longer-term debt securities usually change more than the values of shorter-term debt securities. When interest rates fall, debt securities may be repaid more quickly than expected and the Fund may be required to reinvest the proceeds at a lower interest rate. This is referred to as "prepayment risk." When interest rates rise, debt securities may be repaid more slowly than expected and the value of the Fund's holdings may fall sharply. This is referred to as "extension risk." Interest rate changes normally have different effects on variable or floating rate securities than they do on securities with fixed interest rates.

Fixed-Income Market Risks . Economic and other market developments can adversely affect fixed-income securities markets in the United States, Europe and elsewhere. At times, participants in debt securities markets may develop concerns about the ability of certain issuers of debt securities to make timely principal and interest payments, or they may develop concerns about the ability of financial institutions that make markets in certain debt securities to facilitate an orderly market. Those concerns can cause increased volatility in those debt securities or debt securities markets. Under some circumstances, as was the case during the latter half of 2008 and early 2009, those concerns could cause reduced liquidity in certain debt securities markets. A lack of liquidity or other adverse credit market conditions may hamper the Fund's ability to sell the debt securities in which it invests or to find and purchase suitable debt instruments.

Special Risks of Lower-Grade Securities. Lower-grade debt securities, whether rated or unrated, have greater risks than investment-grade securities. They may be subject to greater price fluctuations and have a greater risk that the issuer might not be able to pay interest and principal when due. The market for lower-grade securities may be less liquid and therefore they may be harder to value or to sell at an acceptable price, especially during times of market volatility or decline.

Main Risks of Foreign Investing. Foreign securities are subject to special risks. Foreign issuers are usually not subject to the same accounting and disclosure requirements that U.S. companies are subject to, which may make it difficult for the Fund to evaluate a foreign company's operations or financial condition. A change in the value of a foreign currency against the U.S. dollar will result in a change in the U.S. dollar value of securities denominated in that foreign currency and in the value of any income or distributions the Fund may receive on those securities. The value of foreign investments may be affected by exchange control regulations, foreign taxes, higher transaction and other costs, delays in the settlement of transactions, changes in economic or monetary policy in the United States or abroad, expropriation or nationalization of a company's assets, or other political and economic factors. These risks may be greater for investments in developing or emerging market countries.

Special Risks of Developing and Emerging Markets. The economies of developing or emerging market countries may be more dependent on relatively few industries that may be highly vulnerable to local and global changes. The governments of developing and emerging market countries may also be more unstable than the governments of more developed countries. These countries generally have less developed securities markets or exchanges, and less developed legal and accounting systems. Securities may be more difficult to sell at an acceptable price and may be more volatile than securities in countries with more mature markets. The value of developing or emerging market currencies may fluctuate more than the currencies of countries with more mature markets. Investments in developing or emerging market countries may be subject to greater risks of government restrictions, including confiscatory taxation, expropriation or nationalization of a company's assets, restrictions on foreign ownership of local companies and restrictions on withdrawing assets from the country. Investments in securities of issuers in developing or emerging market countries may be considered speculative.

Main Risks of Commodity-Linked Investments. Commodity-linked investments are considered speculative and have substantial risks, including the risk of loss of a significant portion of their principal value. Prices of commodities and commodity-linked investments may fluctuate significantly over short periods due to a variety of factors, including for example agricultural, economic and regulatory developments. These risks may make commodity-linked investments more volatile than other types of investments.

Main Risks Of Investments In The Fund's Wholly-Owned Subsidiary. The Subsidiary is not registered under the Investment Company Act of 1940 and is not subject to its investor protections (except as otherwise noted in this prospectus). As an investor in the Subsidiary, the Fund does not have all of the protections offered to investors by the Investment Company Act of 1940. However, the Subsidiary is wholly-owned and controlled by the Fund and managed by the Manager. Therefore, the Fund's ownership and control of the Subsidiary make it unlikely that the Subsidiary would take actions contrary to the interests of the Fund or its shareholders.

Changes in the laws of the Cayman Islands (where the Subsidiary is organized) could prevent the Subsidiary from operating as described in this prospectus and could negatively affect the Fund and its shareholders. For example, the Cayman Islands currently does not impose certain taxes on exempted companies like the Subsidiary, including income and capital gains tax, among others. If Cayman Islands laws were changed to require such entities to pay Cayman Islands taxes, the investment returns of the Fund would likely decrease.

The Fund has requested a private letter ruling from the Internal Revenue Service confirming that income from the Fund's investment in the Subsidiary constitutes "qualifying income" for purposes of the tax rules. Currently, the Internal Revenue Service has suspended the granting of private letter rulings, pending further internal discussion. As a result, there can be no assurance that the Internal Revenue Service will grant the private letter ruling requested. If the Internal Revenue Service does not grant the private letter ruling request, there is a risk that the Internal Revenue Service could assert that the annual net profit realized by the Subsidiary and imputed for income tax purposes to the Fund will not be considered "qualifying income" for purposes of the Fund remaining qualified as a regulated investment company for federal income tax purposes.

Who is the Fund Designed For? The Fund is designed primarily for investors seeking current income with the opportunity for some capital growth in their investment 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 that has substantial investments in equity securities. Although the Fund seeks current income, it is not designed for investors needing an assured level of 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.

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 from year to year and by showing how the Fund's average annual returns for 1, 5 and 10 years 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/CapitalIncomeFund

Sales charges and taxes are not included in the calculations and the returns would be lower if they were. During the period shown, the highest return for a calendar quarter was 18.21% (2nd Qtr 03) and the lowest return was -24.23% (4th Qtr 08). For the period from January 1, 2011 to September 30, 2011, the cumulative return before taxes was 1.08%.

Average Annual Total Returns for the periods ended December 31, 2010

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.

No performance information is included for Class Y shares because they do not have one full calendar year of performance.

Average Annual Total Returns (Oppenheimer Capital Income Fund)		Inception Date	1 Year	5 Years	10 Years (or life of class, if less)
Class A Shares		Dec. 01, 1970	5.21%	(2.43%)	1.10%
Class A Shares Return After Taxes on Distributions			3.88%	(3.58%)	(0.37%)
Class A Shares Return After Taxes on Distributions and Sale of Fund Shares			3.55%	(2.38%)	0.33%
Class B Shares		Aug. 17, 1993	5.64%	(2.45%)	1.21%
Class C Shares		Nov. 01, 1955	9.70%	(2.10%)	0.87%
Class N Shares		Mar. 01, 2001	10.19%	(1.66%)	1.18%
Russell 3000 Index			16.93%	2.74%	2.16%
Russell 3000 Index (reflects no deduction for fees, expenses or taxes)	[1]				2.84%
Barclay Capital U.S. Aggregate Bond Index			6.54%	5.80%	5.84%
Barclay Capital U.S. Aggregate Bond Index (reflects no deduction for fees, expenses or taxes)	[1]				5.67%

[1] "Management Fees" reflects the gross management fees paid to the Manager by the Fund during the Fund's most recent fiscal year and the estimated gross management fee of the Subsidiary for its first fiscal year.

[2] "Other Expenses of the Fund" have been restated to reflect current fees.

[3] "Other Expenses of the Subsidiary" are based on estimated amounts for its first fiscal year.

[4] The Manager has voluntarily agreed to waive fees and/or reimburse Fund expenses in an amount equal to the indirect management fees incurred through the Fund's investment in Oppenheimer Institutional Money Market Fund. The Fund's transfer agent has voluntarily agreed to limit its fees for all classes to 0.35% of average annual net assets per class. Each of these expense limitations may be amended or withdrawn after one year from the date of this prospectus. The Manager has also contractually agreed to waive the management fee it receives from the Fund in an amount equal to the management fee it receives from the Subsidiary. This waiver will continue in effect for so long as the Fund invests in the Subsidiary, and may not be terminated by the Manager unless termination is approved by the Fund's Board of Trustees.

[1] From 2/28/01

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Shareholder Fees (dei_DocumentInformationDocumentAxis, (Oppenheimer Capital Income Fund))	0 Months Ended
	Dec. 29, 2011
Class A Shares
Shareholder Fees:
Maximum Sales Charge (Load) imposed on purchases (as % of offering price)	5.75%
Maximum Deferred Sales Charge (Load) (as % of the lower of original offering price or redemption proceeds)	none
Class B Shares
Shareholder Fees:
Maximum Sales Charge (Load) imposed on purchases (as % of offering price)	none
Maximum Deferred Sales Charge (Load) (as % of the lower of original offering price or redemption proceeds)	5.00%
Class C Shares
Shareholder Fees:
Maximum Sales Charge (Load) imposed on purchases (as % of offering price)	none
Maximum Deferred Sales Charge (Load) (as % of the lower of original offering price or redemption proceeds)	1.00%
Class N Shares
Shareholder Fees:
Maximum Sales Charge (Load) imposed on purchases (as % of offering price)	none
Maximum Deferred Sales Charge (Load) (as % of the lower of original offering price or redemption proceeds)	1.00%
Class Y Shares
Shareholder Fees:
Maximum Sales Charge (Load) imposed on purchases (as % of offering price)	none
Maximum Deferred Sales Charge (Load) (as % of the lower of original offering price or redemption proceeds)	none

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(Oppenheimer Capital Income Fund)

Investment Objective. The Fund's primary objective is to seek as much current income as is compatible with prudent investment. The Fund has a secondary objective to conserve principal while providing an opportunity for capital appreciation.

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 15 of the prospectus and in the sections "How to Buy Shares" beginning on page 58 and "Appendix A" in the Fund's Statement of Additional Information.

Shareholder Fees (fees paid directly from your investment)

Shareholder Fees (Oppenheimer Capital Income Fund)	Class A Shares	Class B Shares	Class C Shares	Class N Shares	Class Y Shares
Maximum Sales Charge (Load) imposed on purchases (as % of offering price)	5.75%	none	none	none	none
Maximum Deferred Sales Charge (Load) (as % of the lower of original offering price or redemption proceeds)	none	5.00%	1.00%	1.00%	none

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses (Oppenheimer Capital Income Fund)		Class A Shares	Class B Shares	Class C Shares	Class N Shares	Class Y Shares
Management Fees	[1]	0.56%	0.56%	0.56%	0.56%	0.56%
Distribution and/or Service (12b-1) Fees		0.23%	1.00%	1.00%	0.48%	none
Acquired Fund Fees and Expenses		0.03%	0.03%	0.03%	0.03%	0.03%
Other Expenses of the Fund	[2]	0.21%	0.57%	0.32%	0.32%	0.04%
Other Expenses of the Subsidiary	[3]	none	none	none	none	none
Total Other Expenses		0.21%	0.57%	0.32%	0.32%	0.04%
Total Annual Fund Operating Expenses		1.03%	2.16%	1.91%	1.39%	0.63%
Fee Waiver and Expense Reimbursement	[4]	(0.05%)	(0.17%)	(0.05%)	(0.05%)	(0.05%)
Total Annual Fund Operating Expenses After Fee Waiver and Expense Reimbursement		0.98%	1.99%	1.86%	1.34%	0.58%

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:

If shares are redeemed

Expense Example (Oppenheimer Capital Income Fund) (USD $)	1 Year	3 Years	5 Years	10 Years
Class A Shares	670	881	1,109	1,764
Class B Shares	704	967	1,356	1,942
Class C Shares	291	601	1,037	2,250
Class N Shares	237	438	761	1,676
Class Y Shares	59	197	347	784

If shares are not redeemed

Expense Example, No Redemption (Oppenheimer Capital Income Fund) (USD $)	1 Year	3 Years	5 Years	10 Years
Class A Shares	670	881	1,109	1,764
Class B Shares	204	667	1,156	1,942
Class C Shares	191	601	1,037	2,250
Class N Shares	137	438	761	1,676
Class Y Shares	59	197	347	784

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 92% of the average value of its portfolio.

Principal Investment Strategies. The Fund invests in both equity and debt securities of domestic and foreign issuers in different capitalization ranges and in developed or developing countries. Under normal market conditions, the Fund invests at least 65% of its total assets in equity and debt securities that are expected to generate income. The percentages of equity and debt securities the Fund holds may vary from time to time. There is no limit on the Fund's investments in foreign securities.

Equity Securities. In selecting equity securities, the portfolio manager mainly uses a value-oriented investing style. A security may be undervalued because the market does not yet recognize its potential or the issuer is temporarily out of favor. The Fund seeks to realize gains when other investors recognize the real or prospective worth of the security. Value securities may offer higher than average dividends and the Fund may invest in equity securities to seek both current income and capital growth. The portfolio manager typically looks for securities that: have high current income, are believed to have substantial earnings possibilities, have low price/earnings ratios, and have a low price relative to the underlying value of the issuer's assets, earnings, cash flow or other factors.

Debt Securities. The portfolio manager looks for high current yields and typically searches for corporate and government debt securities that offer: attractive relative value, more income than U.S. treasury obligations, a balance of risk and return, high income potential and portfolio diversification.

The Fund's debt securities may be rated by a nationally recognized statistical rating organization or may be unrated. The Fund can invest up to 25% of its total assets below investment grade securities, also referred to as "junk bonds," but cannot invest more than 10% of its assets in below investment grade non-convertible securities. "Investment grade" securities are rated in one of the top four rating categories.

Derivative Securities. The Fund may also use derivative instruments to seek income or to try to manage investment risks, including: options, futures, swaps, "structured" notes, mortgage-related securities and equity-linked debt securities.

The Fund may sell securities that no longer meet the above criteria.

The Fund has established a Cayman Islands company that is wholly-owned and controlled by the Fund (the "Subsidiary"). The Fund may invest up to 25% of its total assets in the Subsidiary. The Subsidiary invests primarily in commodity-linked derivatives (including commodity futures, financial futures, options and swap contracts) and exchange-traded funds related to gold or other special minerals ("Gold ETFs"). The Subsidiary may also invest in certain fixed-income securities and other investments that may serve as margin or collateral for its derivatives positions. Investments in the Subsidiary are intended to provide the Fund with exposure to commodities market returns within the limitations of the federal tax requirements that apply to the Fund. The Fund applies its investment restrictions and compliance policies and procedures, on a look-through basis, to the Subsidiary. The Fund's investment in the Subsidiary may vary based on the portfolio manager's use of different types of commodity-linked derivatives, fixed-income securities, Gold ETFs, and other investments. Since the Fund may invest a substantial portion of its assets in the Subsidiary, which may hold certain of the investments described in this prospectus, the Fund may be considered to be investing indirectly in those investments through its Subsidiary. Therefore, references in this prospectus to investments by the Fund also may be deemed to include the Fund's indirect investments through the Subsidiary.

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 security 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 Equity Securities. Stocks and other equity securities fluctuate in price. The value of the Fund's portfolio may be affected by changes in the equity markets generally. Equity markets may experience significant short-term volatility and may fall sharply at times. Different markets may behave differently from each other and U.S. equity markets may move in the opposite direction from one or more foreign markets.

The prices of individual equity securities 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 securities. These factors may include: 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.

Main Risks of Value Investing. Value investing entails the risk that if the market does not recognize that the Fund's securities are undervalued, the prices of those securities might not appreciate as anticipated. A value approach could also result in fewer investments that increase rapidly during times of market gains and could cause the Fund to underperform funds that use a growth or non-value approach to investing. Value investing has gone in and out of favor during past market cycles and when value investing is out of favor or when markets are unstable, the securities of "value" companies may underperform the securities of "growth" companies.

Main Risks of Debt Securities. Debt securities may be subject to credit risk, interest rate risk, prepayment risk and extension risk. Credit risk is the risk that the issuer of a security might not make interest and principal payments on the security as they become due. If an issuer fails to pay interest or repay principal, the Fund's income or share value might be reduced. Adverse news about an issuer or a downgrade in an issuer's credit rating, for any reason, can also reduce the market value of the issuer's securities. Interest rate risk is the risk that when prevailing interest rates fall, the values of already-issued debt securities generally rise; and when prevailing interest rates rise, the values of already-issued debt securities generally fall, and they may be worth less than the amount the Fund paid for them. When interest rates change, the values of longer-term debt securities usually change more than the values of shorter-term debt securities. When interest rates fall, debt securities may be repaid more quickly than expected and the Fund may be required to reinvest the proceeds at a lower interest rate. This is referred to as "prepayment risk." When interest rates rise, debt securities may be repaid more slowly than expected and the value of the Fund's holdings may fall sharply. This is referred to as "extension risk." Interest rate changes normally have different effects on variable or floating rate securities than they do on securities with fixed interest rates.

Fixed-Income Market Risks . Economic and other market developments can adversely affect fixed-income securities markets in the United States, Europe and elsewhere. At times, participants in debt securities markets may develop concerns about the ability of certain issuers of debt securities to make timely principal and interest payments, or they may develop concerns about the ability of financial institutions that make markets in certain debt securities to facilitate an orderly market. Those concerns can cause increased volatility in those debt securities or debt securities markets. Under some circumstances, as was the case during the latter half of 2008 and early 2009, those concerns could cause reduced liquidity in certain debt securities markets. A lack of liquidity or other adverse credit market conditions may hamper the Fund's ability to sell the debt securities in which it invests or to find and purchase suitable debt instruments.

Special Risks of Lower-Grade Securities. Lower-grade debt securities, whether rated or unrated, have greater risks than investment-grade securities. They may be subject to greater price fluctuations and have a greater risk that the issuer might not be able to pay interest and principal when due. The market for lower-grade securities may be less liquid and therefore they may be harder to value or to sell at an acceptable price, especially during times of market volatility or decline.

Main Risks of Foreign Investing. Foreign securities are subject to special risks. Foreign issuers are usually not subject to the same accounting and disclosure requirements that U.S. companies are subject to, which may make it difficult for the Fund to evaluate a foreign company's operations or financial condition. A change in the value of a foreign currency against the U.S. dollar will result in a change in the U.S. dollar value of securities denominated in that foreign currency and in the value of any income or distributions the Fund may receive on those securities. The value of foreign investments may be affected by exchange control regulations, foreign taxes, higher transaction and other costs, delays in the settlement of transactions, changes in economic or monetary policy in the United States or abroad, expropriation or nationalization of a company's assets, or other political and economic factors. These risks may be greater for investments in developing or emerging market countries.

Special Risks of Developing and Emerging Markets. The economies of developing or emerging market countries may be more dependent on relatively few industries that may be highly vulnerable to local and global changes. The governments of developing and emerging market countries may also be more unstable than the governments of more developed countries. These countries generally have less developed securities markets or exchanges, and less developed legal and accounting systems. Securities may be more difficult to sell at an acceptable price and may be more volatile than securities in countries with more mature markets. The value of developing or emerging market currencies may fluctuate more than the currencies of countries with more mature markets. Investments in developing or emerging market countries may be subject to greater risks of government restrictions, including confiscatory taxation, expropriation or nationalization of a company's assets, restrictions on foreign ownership of local companies and restrictions on withdrawing assets from the country. Investments in securities of issuers in developing or emerging market countries may be considered speculative.

Main Risks of Commodity-Linked Investments. Commodity-linked investments are considered speculative and have substantial risks, including the risk of loss of a significant portion of their principal value. Prices of commodities and commodity-linked investments may fluctuate significantly over short periods due to a variety of factors, including for example agricultural, economic and regulatory developments. These risks may make commodity-linked investments more volatile than other types of investments.

Main Risks Of Investments In The Fund's Wholly-Owned Subsidiary. The Subsidiary is not registered under the Investment Company Act of 1940 and is not subject to its investor protections (except as otherwise noted in this prospectus). As an investor in the Subsidiary, the Fund does not have all of the protections offered to investors by the Investment Company Act of 1940. However, the Subsidiary is wholly-owned and controlled by the Fund and managed by the Manager. Therefore, the Fund's ownership and control of the Subsidiary make it unlikely that the Subsidiary would take actions contrary to the interests of the Fund or its shareholders.

Changes in the laws of the Cayman Islands (where the Subsidiary is organized) could prevent the Subsidiary from operating as described in this prospectus and could negatively affect the Fund and its shareholders. For example, the Cayman Islands currently does not impose certain taxes on exempted companies like the Subsidiary, including income and capital gains tax, among others. If Cayman Islands laws were changed to require such entities to pay Cayman Islands taxes, the investment returns of the Fund would likely decrease.

The Fund has requested a private letter ruling from the Internal Revenue Service confirming that income from the Fund's investment in the Subsidiary constitutes "qualifying income" for purposes of the tax rules. Currently, the Internal Revenue Service has suspended the granting of private letter rulings, pending further internal discussion. As a result, there can be no assurance that the Internal Revenue Service will grant the private letter ruling requested. If the Internal Revenue Service does not grant the private letter ruling request, there is a risk that the Internal Revenue Service could assert that the annual net profit realized by the Subsidiary and imputed for income tax purposes to the Fund will not be considered "qualifying income" for purposes of the Fund remaining qualified as a regulated investment company for federal income tax purposes.

Who is the Fund Designed For? The Fund is designed primarily for investors seeking current income with the opportunity for some capital growth in their investment 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 that has substantial investments in equity securities. Although the Fund seeks current income, it is not designed for investors needing an assured level of 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.

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 from year to year and by showing how the Fund's average annual returns for 1, 5 and 10 years 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/CapitalIncomeFund

Sales charges and taxes are not included in the calculations and the returns would be lower if they were. During the period shown, the highest return for a calendar quarter was 18.21% (2nd Qtr 03) and the lowest return was -24.23% (4th Qtr 08). For the period from January 1, 2011 to September 30, 2011, the cumulative return before taxes was 1.08%.

Average Annual Total Returns for the periods ended December 31, 2010

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.

No performance information is included for Class Y shares because they do not have one full calendar year of performance.

Average Annual Total Returns (Oppenheimer Capital Income Fund)		Inception Date	1 Year	5 Years	10 Years (or life of class, if less)
Class A Shares		Dec. 01, 1970	5.21%	(2.43%)	1.10%
Class A Shares Return After Taxes on Distributions			3.88%	(3.58%)	(0.37%)
Class A Shares Return After Taxes on Distributions and Sale of Fund Shares			3.55%	(2.38%)	0.33%
Class B Shares		Aug. 17, 1993	5.64%	(2.45%)	1.21%
Class C Shares		Nov. 01, 1955	9.70%	(2.10%)	0.87%
Class N Shares		Mar. 01, 2001	10.19%	(1.66%)	1.18%
Russell 3000 Index			16.93%	2.74%	2.16%
Russell 3000 Index (reflects no deduction for fees, expenses or taxes)	[1]				2.84%
Barclay Capital U.S. Aggregate Bond Index			6.54%	5.80%	5.84%
Barclay Capital U.S. Aggregate Bond Index (reflects no deduction for fees, expenses or taxes)	[1]				5.67%

[1] "Management Fees" reflects the gross management fees paid to the Manager by the Fund during the Fund's most recent fiscal year and the estimated gross management fee of the Subsidiary for its first fiscal year.

[2] "Other Expenses of the Fund" have been restated to reflect current fees.

[3] "Other Expenses of the Subsidiary" are based on estimated amounts for its first fiscal year.

[4] The Manager has voluntarily agreed to waive fees and/or reimburse Fund expenses in an amount equal to the indirect management fees incurred through the Fund's investment in Oppenheimer Institutional Money Market Fund. The Fund's transfer agent has voluntarily agreed to limit its fees for all classes to 0.35% of average annual net assets per class. Each of these expense limitations may be amended or withdrawn after one year from the date of this prospectus. The Manager has also contractually agreed to waive the management fee it receives from the Fund in an amount equal to the management fee it receives from the Subsidiary. This waiver will continue in effect for so long as the Fund invests in the Subsidiary, and may not be terminated by the Manager unless termination is approved by the Fund's Board of Trustees.

[1] From 2/28/01

XML

Average Annual Total Returns (dei_DocumentInformationDocumentAxis, (Oppenheimer Capital Income Fund))	0 Months Ended
	Dec. 29, 2011
Russell 3000 Index
Average Annual Return:
1 Year	16.93%
5 Years	2.74%
10 Years (or life of class, if less)	2.16%
Russell 3000 Index (reflects no deduction for fees, expenses or taxes)
Average Annual Return:
10 Years (or life of class, if less)	2.84%	[1]
Barclay Capital U.S. Aggregate Bond Index
Average Annual Return:
1 Year	6.54%
5 Years	5.80%
10 Years (or life of class, if less)	5.84%
Barclay Capital U.S. Aggregate Bond Index (reflects no deduction for fees, expenses or taxes)
Average Annual Return:
10 Years (or life of class, if less)	5.67%	[1]
Class A Shares
Average Annual Return:
1 Year	5.21%
5 Years	(2.43%)
10 Years (or life of class, if less)	1.10%
Inception Date	Dec. 01, 1970
Class A Shares | Return After Taxes on Distributions
Average Annual Return:
1 Year	3.88%
5 Years	(3.58%)
10 Years (or life of class, if less)	(0.37%)
Class A Shares | Return After Taxes on Distributions and Sale of Fund Shares
Average Annual Return:
1 Year	3.55%
5 Years	(2.38%)
10 Years (or life of class, if less)	0.33%
Class B Shares
Average Annual Return:
1 Year	5.64%
5 Years	(2.45%)
10 Years (or life of class, if less)	1.21%
Inception Date	Aug. 17, 1993
Class C Shares
Average Annual Return:
1 Year	9.70%
5 Years	(2.10%)
10 Years (or life of class, if less)	0.87%
Inception Date	Nov. 01, 1955
Class N Shares
Average Annual Return:
1 Year	10.19%
5 Years	(1.66%)
10 Years (or life of class, if less)	1.18%
Inception Date	Mar. 01, 2001

[1] From 2/28/01

XML

Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Document Type

dei_DocumentType

485BPOS

Document Period End Date

dei_DocumentPeriodEndDate

Aug. 31, 2011

Registrant Name

dei_EntityRegistrantName

OPPENHEIMER CAPITAL INCOME FUND

Central Index Key

dei_EntityCentralIndexKey

0000045156

Amendment Flag

dei_AmendmentFlag

false

Document Creation Date

dei_DocumentCreationDate

Dec. 23, 2011

Document Effective Date

dei_DocumentEffectiveDate

Dec. 29, 2011

Prospectus Date

rr_ProspectusDate

Dec. 29, 2011

(Oppenheimer Capital Income Fund)

Risk/Return:

rr_RiskReturnAbstract

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

Investment Objective. The Fund's primary objective is to seek as much current income as is compatible with prudent investment. The Fund has a secondary objective to conserve principal while providing an opportunity for 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 15 of the prospectus and in the sections "How to Buy Shares" beginning on page 58 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)

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 92% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

92.00%

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 Breakpoint, Minimum Investment Required [Amount]

rr_ExpenseBreakpointMinimumInvestmentRequiredAmount

25,000

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

Strategy Narrative [Text Block]

rr_StrategyNarrativeTextBlock

Principal Investment Strategies. The Fund invests in both equity and debt securities of domestic and foreign issuers in different capitalization ranges and in developed or developing countries. Under normal market conditions, the Fund invests at least 65% of its total assets in equity and debt securities that are expected to generate income. The percentages of equity and debt securities the Fund holds may vary from time to time. There is no limit on the Fund's investments in foreign securities.

Equity Securities. In selecting equity securities, the portfolio manager mainly uses a value-oriented investing style. A security may be undervalued because the market does not yet recognize its potential or the issuer is temporarily out of favor. The Fund seeks to realize gains when other investors recognize the real or prospective worth of the security. Value securities may offer higher than average dividends and the Fund may invest in equity securities to seek both current income and capital growth. The portfolio manager typically looks for securities that: have high current income, are believed to have substantial earnings possibilities, have low price/earnings ratios, and have a low price relative to the underlying value of the issuer's assets, earnings, cash flow or other factors.

Debt Securities. The portfolio manager looks for high current yields and typically searches for corporate and government debt securities that offer: attractive relative value, more income than U.S. treasury obligations, a balance of risk and return, high income potential and portfolio diversification.

The Fund's debt securities may be rated by a nationally recognized statistical rating organization or may be unrated. The Fund can invest up to 25% of its total assets below investment grade securities, also referred to as "junk bonds," but cannot invest more than 10% of its assets in below investment grade non-convertible securities. "Investment grade" securities are rated in one of the top four rating categories.

Derivative Securities. The Fund may also use derivative instruments to seek income or to try to manage investment risks, including: options, futures, swaps, "structured" notes, mortgage-related securities and equity-linked debt securities.

The Fund may sell securities that no longer meet the above criteria.

The Fund has established a Cayman Islands company that is wholly-owned and controlled by the Fund (the "Subsidiary"). The Fund may invest up to 25% of its total assets in the Subsidiary. The Subsidiary invests primarily in commodity-linked derivatives (including commodity futures, financial futures, options and swap contracts) and exchange-traded funds related to gold or other special minerals ("Gold ETFs"). The Subsidiary may also invest in certain fixed-income securities and other investments that may serve as margin or collateral for its derivatives positions. Investments in the Subsidiary are intended to provide the Fund with exposure to commodities market returns within the limitations of the federal tax requirements that apply to the Fund. The Fund applies its investment restrictions and compliance policies and procedures, on a look-through basis, to the Subsidiary. The Fund's investment in the Subsidiary may vary based on the portfolio manager's use of different types of commodity-linked derivatives, fixed-income securities, Gold ETFs, and other investments. Since the Fund may invest a substantial portion of its assets in the Subsidiary, which may hold certain of the investments described in this prospectus, the Fund may be considered to be investing indirectly in those investments through its Subsidiary. Therefore, references in this prospectus to investments by the Fund also may be deemed to include the Fund's indirect investments through the Subsidiary.

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 security 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 Equity Securities. Stocks and other equity securities fluctuate in price. The value of the Fund's portfolio may be affected by changes in the equity markets generally. Equity markets may experience significant short-term volatility and may fall sharply at times. Different markets may behave differently from each other and U.S. equity markets may move in the opposite direction from one or more foreign markets.

The prices of individual equity securities 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 securities. These factors may include: 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.

Main Risks of Value Investing. Value investing entails the risk that if the market does not recognize that the Fund's securities are undervalued, the prices of those securities might not appreciate as anticipated. A value approach could also result in fewer investments that increase rapidly during times of market gains and could cause the Fund to underperform funds that use a growth or non-value approach to investing. Value investing has gone in and out of favor during past market cycles and when value investing is out of favor or when markets are unstable, the securities of "value" companies may underperform the securities of "growth" companies.

Main Risks of Debt Securities. Debt securities may be subject to credit risk, interest rate risk, prepayment risk and extension risk. Credit risk is the risk that the issuer of a security might not make interest and principal payments on the security as they become due. If an issuer fails to pay interest or repay principal, the Fund's income or share value might be reduced. Adverse news about an issuer or a downgrade in an issuer's credit rating, for any reason, can also reduce the market value of the issuer's securities. Interest rate risk is the risk that when prevailing interest rates fall, the values of already-issued debt securities generally rise; and when prevailing interest rates rise, the values of already-issued debt securities generally fall, and they may be worth less than the amount the Fund paid for them. When interest rates change, the values of longer-term debt securities usually change more than the values of shorter-term debt securities. When interest rates fall, debt securities may be repaid more quickly than expected and the Fund may be required to reinvest the proceeds at a lower interest rate. This is referred to as "prepayment risk." When interest rates rise, debt securities may be repaid more slowly than expected and the value of the Fund's holdings may fall sharply. This is referred to as "extension risk." Interest rate changes normally have different effects on variable or floating rate securities than they do on securities with fixed interest rates.

Fixed-Income Market Risks . Economic and other market developments can adversely affect fixed-income securities markets in the United States, Europe and elsewhere. At times, participants in debt securities markets may develop concerns about the ability of certain issuers of debt securities to make timely principal and interest payments, or they may develop concerns about the ability of financial institutions that make markets in certain debt securities to facilitate an orderly market. Those concerns can cause increased volatility in those debt securities or debt securities markets. Under some circumstances, as was the case during the latter half of 2008 and early 2009, those concerns could cause reduced liquidity in certain debt securities markets. A lack of liquidity or other adverse credit market conditions may hamper the Fund's ability to sell the debt securities in which it invests or to find and purchase suitable debt instruments.

Special Risks of Lower-Grade Securities. Lower-grade debt securities, whether rated or unrated, have greater risks than investment-grade securities. They may be subject to greater price fluctuations and have a greater risk that the issuer might not be able to pay interest and principal when due. The market for lower-grade securities may be less liquid and therefore they may be harder to value or to sell at an acceptable price, especially during times of market volatility or decline.

Main Risks of Foreign Investing. Foreign securities are subject to special risks. Foreign issuers are usually not subject to the same accounting and disclosure requirements that U.S. companies are subject to, which may make it difficult for the Fund to evaluate a foreign company's operations or financial condition. A change in the value of a foreign currency against the U.S. dollar will result in a change in the U.S. dollar value of securities denominated in that foreign currency and in the value of any income or distributions the Fund may receive on those securities. The value of foreign investments may be affected by exchange control regulations, foreign taxes, higher transaction and other costs, delays in the settlement of transactions, changes in economic or monetary policy in the United States or abroad, expropriation or nationalization of a company's assets, or other political and economic factors. These risks may be greater for investments in developing or emerging market countries.

Special Risks of Developing and Emerging Markets. The economies of developing or emerging market countries may be more dependent on relatively few industries that may be highly vulnerable to local and global changes. The governments of developing and emerging market countries may also be more unstable than the governments of more developed countries. These countries generally have less developed securities markets or exchanges, and less developed legal and accounting systems. Securities may be more difficult to sell at an acceptable price and may be more volatile than securities in countries with more mature markets. The value of developing or emerging market currencies may fluctuate more than the currencies of countries with more mature markets. Investments in developing or emerging market countries may be subject to greater risks of government restrictions, including confiscatory taxation, expropriation or nationalization of a company's assets, restrictions on foreign ownership of local companies and restrictions on withdrawing assets from the country. Investments in securities of issuers in developing or emerging market countries may be considered speculative.

Main Risks of Commodity-Linked Investments. Commodity-linked investments are considered speculative and have substantial risks, including the risk of loss of a significant portion of their principal value. Prices of commodities and commodity-linked investments may fluctuate significantly over short periods due to a variety of factors, including for example agricultural, economic and regulatory developments. These risks may make commodity-linked investments more volatile than other types of investments.

Main Risks Of Investments In The Fund's Wholly-Owned Subsidiary. The Subsidiary is not registered under the Investment Company Act of 1940 and is not subject to its investor protections (except as otherwise noted in this prospectus). As an investor in the Subsidiary, the Fund does not have all of the protections offered to investors by the Investment Company Act of 1940. However, the Subsidiary is wholly-owned and controlled by the Fund and managed by the Manager. Therefore, the Fund's ownership and control of the Subsidiary make it unlikely that the Subsidiary would take actions contrary to the interests of the Fund or its shareholders.

Changes in the laws of the Cayman Islands (where the Subsidiary is organized) could prevent the Subsidiary from operating as described in this prospectus and could negatively affect the Fund and its shareholders. For example, the Cayman Islands currently does not impose certain taxes on exempted companies like the Subsidiary, including income and capital gains tax, among others. If Cayman Islands laws were changed to require such entities to pay Cayman Islands taxes, the investment returns of the Fund would likely decrease.

The Fund has requested a private letter ruling from the Internal Revenue Service confirming that income from the Fund's investment in the Subsidiary constitutes "qualifying income" for purposes of the tax rules. Currently, the Internal Revenue Service has suspended the granting of private letter rulings, pending further internal discussion. As a result, there can be no assurance that the Internal Revenue Service will grant the private letter ruling requested. If the Internal Revenue Service does not grant the private letter ruling request, there is a risk that the Internal Revenue Service could assert that the annual net profit realized by the Subsidiary and imputed for income tax purposes to the Fund will not be considered "qualifying income" for purposes of the Fund remaining qualified as a regulated investment company for federal income tax purposes.

Who is the Fund Designed For? The Fund is designed primarily for investors seeking current income with the opportunity for some capital growth in their investment 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 that has substantial investments in equity securities. Although the Fund seeks current income, it is not designed for investors needing an assured level of 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.

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 security 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 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 from year to year and by showing how the Fund's average annual returns for 1, 5 and 10 years 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/CapitalIncomeFund

Performance Availability Website Address [Text]

rr_PerformanceAvailabilityWebSiteAddress

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/CapitalIncomeFund

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.

Bar Chart Closing [Text Block]

rr_BarChartClosingTextBlock

Sales charges and taxes are not included in the calculations and the returns would be lower if they were. During the period shown, the highest return for a calendar quarter was 18.21% (2nd Qtr 03) and the lowest return was -24.23% (4th Qtr 08). For the period from January 1, 2011 to September 30, 2011, the cumulative return before taxes was 1.08%.

Performance Table Heading

rr_PerformanceTableHeading

Average Annual Total Returns for the periods ended December 31, 2010

Performance Table Uses Highest Federal Rate

rr_PerformanceTableUsesHighestFederalRate

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.

Performance Table Not Relevant to Tax Deferred

rr_PerformanceTableNotRelevantToTaxDeferred

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.

Performance Table One Class of after Tax Shown [Text]

rr_PerformanceTableOneClassOfAfterTaxShown

After-tax returns are shown for only one class and after-tax returns for other classes will vary.

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.

No performance information is included for Class Y shares because they do not have one full calendar year of performance.

(Oppenheimer Capital Income Fund) | Russell 3000 Index (reflects no deduction for fees, expenses or taxes)

Risk/Return:

rr_RiskReturnAbstract

10 Years (or life of class, if less)

rr_AverageAnnualReturnYear10

2.84%

^[5]

(Oppenheimer Capital Income Fund) | Barclay Capital U.S. Aggregate Bond Index

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

6.54%

5 Years

rr_AverageAnnualReturnYear05

5.80%

10 Years (or life of class, if less)

rr_AverageAnnualReturnYear10

5.84%

(Oppenheimer Capital Income Fund) | Russell 3000 Index

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

16.93%

5 Years

rr_AverageAnnualReturnYear05

2.74%

10 Years (or life of class, if less)

rr_AverageAnnualReturnYear10

2.16%

(Oppenheimer Capital Income Fund) | Barclay Capital U.S. Aggregate Bond Index (reflects no deduction for fees, expenses or taxes)

Risk/Return:

rr_RiskReturnAbstract

10 Years (or life of class, if less)

rr_AverageAnnualReturnYear10

5.67%

^[5]

(Oppenheimer Capital Income Fund) | Class A Shares

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_MaximumDeferredSalesChargeOverOfferingPrice

none

Management Fees

rr_ManagementFeesOverAssets

0.56%

^[1]

Distribution and/or Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.23%

Other Expenses of the Fund

rr_Component1OtherExpensesOverAssets

0.21%

^[2]

Other Expenses of the Subsidiary

rr_Component2OtherExpensesOverAssets

none

^[3]

Total Other Expenses

rr_OtherExpensesOverAssets

0.21%

Acquired Fund Fees and Expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.03%

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

1.03%

Fee Waiver and Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.05%)

^[4]

Total Annual Fund Operating Expenses After Fee Waiver and Expense Reimbursement

rr_NetExpensesOverAssets

0.98%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

670

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

881

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

1,109

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,764

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

670

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

881

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

1,109

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

1,764

Annual Return 2001

rr_AnnualReturn2001

(0.19%)

Annual Return 2002

rr_AnnualReturn2002

(16.15%)

Annual Return 2003

rr_AnnualReturn2003

33.47%

Annual Return 2004

rr_AnnualReturn2004

10.28%

Annual Return 2005

rr_AnnualReturn2005

2.43%

Annual Return 2006

rr_AnnualReturn2006

15.16%

Annual Return 2007

rr_AnnualReturn2007

(1.85%)

Annual Return 2008

rr_AnnualReturn2008

(37.05%)

Annual Return 2009

rr_AnnualReturn2009

18.10%

Annual Return 2010

rr_AnnualReturn2010

11.63%

Year to Date Return, Label

rr_YearToDateReturnLabel

For the period from January 1, 2011 to September 30, 2011, the cumulative return before taxes was 1.08%.

Bar Chart, Year to Date Return

rr_BarChartYearToDateReturn

1.08%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

the highest return for a calendar quarter was 18.21% (2 Qtr 03)

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

18.21%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

the lowest return was -24.23% (4 Qtr 08)

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(24.23%)

1 Year

rr_AverageAnnualReturnYear01

5.21%

5 Years

rr_AverageAnnualReturnYear05

(2.43%)

10 Years (or life of class, if less)

rr_AverageAnnualReturnYear10

1.10%

Inception Date

rr_AverageAnnualReturnInceptionDate

Dec. 01, 1970

(Oppenheimer Capital Income Fund) | Class A Shares | Return After Taxes on Distributions

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

3.88%

5 Years

rr_AverageAnnualReturnYear05

(3.58%)

10 Years (or life of class, if less)

rr_AverageAnnualReturnYear10

(0.37%)

(Oppenheimer Capital Income Fund) | Class A Shares | Return After Taxes on Distributions and Sale of Fund Shares

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

3.55%

5 Years

rr_AverageAnnualReturnYear05

(2.38%)

10 Years (or life of class, if less)

rr_AverageAnnualReturnYear10

0.33%

(Oppenheimer Capital Income Fund) | Class B Shares

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_MaximumDeferredSalesChargeOverOfferingPrice

5.00%

Management Fees

rr_ManagementFeesOverAssets

0.56%

^[1]

Distribution and/or Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

1.00%

Other Expenses of the Fund

rr_Component1OtherExpensesOverAssets

0.57%

^[2]

Other Expenses of the Subsidiary

rr_Component2OtherExpensesOverAssets

none

^[3]

Total Other Expenses

rr_OtherExpensesOverAssets

0.57%

Acquired Fund Fees and Expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.03%

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

2.16%

Fee Waiver and Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.17%)

^[4]

Total Annual Fund Operating Expenses After Fee Waiver and Expense Reimbursement

rr_NetExpensesOverAssets

1.99%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

704

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

967

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

1,356

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,942

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

204

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

667

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

1,156

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

1,942

1 Year

rr_AverageAnnualReturnYear01

5.64%

5 Years

rr_AverageAnnualReturnYear05

(2.45%)

10 Years (or life of class, if less)

rr_AverageAnnualReturnYear10

1.21%

Inception Date

rr_AverageAnnualReturnInceptionDate

Aug. 17, 1993

(Oppenheimer Capital Income Fund) | Class C Shares

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_MaximumDeferredSalesChargeOverOfferingPrice

1.00%

Management Fees

rr_ManagementFeesOverAssets

0.56%

^[1]

Distribution and/or Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

1.00%

Other Expenses of the Fund

rr_Component1OtherExpensesOverAssets

0.32%

^[2]

Other Expenses of the Subsidiary

rr_Component2OtherExpensesOverAssets

none

^[3]

Total Other Expenses

rr_OtherExpensesOverAssets

0.32%

Acquired Fund Fees and Expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.03%

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

1.91%

Fee Waiver and Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.05%)

^[4]

Total Annual Fund Operating Expenses After Fee Waiver and Expense Reimbursement

rr_NetExpensesOverAssets

1.86%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

291

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

601

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

1,037

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

2,250

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

191

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

601

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

1,037

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

2,250

1 Year

rr_AverageAnnualReturnYear01

9.70%

5 Years

rr_AverageAnnualReturnYear05

(2.10%)

10 Years (or life of class, if less)

rr_AverageAnnualReturnYear10

0.87%

Inception Date

rr_AverageAnnualReturnInceptionDate

Nov. 01, 1955

(Oppenheimer Capital Income Fund) | Class N Shares

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_MaximumDeferredSalesChargeOverOfferingPrice

1.00%

Management Fees

rr_ManagementFeesOverAssets

0.56%

^[1]

Distribution and/or Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.48%

Other Expenses of the Fund

rr_Component1OtherExpensesOverAssets

0.32%

^[2]

Other Expenses of the Subsidiary

rr_Component2OtherExpensesOverAssets

none

^[3]

Total Other Expenses

rr_OtherExpensesOverAssets

0.32%

Acquired Fund Fees and Expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.03%

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

1.39%

Fee Waiver and Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.05%)

^[4]

Total Annual Fund Operating Expenses After Fee Waiver and Expense Reimbursement

rr_NetExpensesOverAssets

1.34%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

237

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

438

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

761

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,676

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

137

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

438

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

761

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

1,676

1 Year

rr_AverageAnnualReturnYear01

10.19%

5 Years

rr_AverageAnnualReturnYear05

(1.66%)

10 Years (or life of class, if less)

rr_AverageAnnualReturnYear10

1.18%

Inception Date

rr_AverageAnnualReturnInceptionDate

Mar. 01, 2001

(Oppenheimer Capital Income Fund) | Class Y Shares

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_MaximumDeferredSalesChargeOverOfferingPrice

none

Management Fees

rr_ManagementFeesOverAssets

0.56%

^[1]

Distribution and/or Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses of the Fund

rr_Component1OtherExpensesOverAssets

0.04%

^[2]

Other Expenses of the Subsidiary

rr_Component2OtherExpensesOverAssets

none

^[3]

Total Other Expenses

rr_OtherExpensesOverAssets

0.04%

Acquired Fund Fees and Expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.03%

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

0.63%

Fee Waiver and Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.05%)

^[4]

Total Annual Fund Operating Expenses After Fee Waiver and Expense Reimbursement

rr_NetExpensesOverAssets

0.58%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

59

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

197

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

347

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

784

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

59

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

197

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

347

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

784

[1] "Management Fees" reflects the gross management fees paid to the Manager by the Fund during the Fund's most recent fiscal year and the estimated gross management fee of the Subsidiary for its first fiscal year.

[2] "Other Expenses of the Fund" have been restated to reflect current fees.

[3] "Other Expenses of the Subsidiary" are based on estimated amounts for its first fiscal year.

[4] The Manager has voluntarily agreed to waive fees and/or reimburse Fund expenses in an amount equal to the indirect management fees incurred through the Fund's investment in Oppenheimer Institutional Money Market Fund. The Fund's transfer agent has voluntarily agreed to limit its fees for all classes to 0.35% of average annual net assets per class. Each of these expense limitations may be amended or withdrawn after one year from the date of this prospectus. The Manager has also contractually agreed to waive the management fee it receives from the Fund in an amount equal to the management fee it receives from the Subsidiary. This waiver will continue in effect for so long as the Fund invests in the Subsidiary, and may not be terminated by the Manager unless termination is approved by the Fund's Board of Trustees.

[5] From 2/28/01

XML

Annual Fund Operating Expenses (dei_DocumentInformationDocumentAxis, (Oppenheimer Capital Income Fund))	0 Months Ended
	Dec. 29, 2011
Class A Shares
Operating Expenses:
Management Fees	0.56%	[1]
Distribution and/or Service (12b-1) Fees	0.23%
Other Expenses of the Fund	0.21%	[2]
Other Expenses of the Subsidiary	none	[3]
Total Other Expenses	0.21%
Acquired Fund Fees and Expenses	0.03%
Total Annual Fund Operating Expenses	1.03%
Fee Waiver and Expense Reimbursement	(0.05%)	[4]
Total Annual Fund Operating Expenses After Fee Waiver and Expense Reimbursement	0.98%
Class B Shares
Operating Expenses:
Management Fees	0.56%	[1]
Distribution and/or Service (12b-1) Fees	1.00%
Other Expenses of the Fund	0.57%	[2]
Other Expenses of the Subsidiary	none	[3]
Total Other Expenses	0.57%
Acquired Fund Fees and Expenses	0.03%
Total Annual Fund Operating Expenses	2.16%
Fee Waiver and Expense Reimbursement	(0.17%)	[4]
Total Annual Fund Operating Expenses After Fee Waiver and Expense Reimbursement	1.99%
Class C Shares
Operating Expenses:
Management Fees	0.56%	[1]
Distribution and/or Service (12b-1) Fees	1.00%
Other Expenses of the Fund	0.32%	[2]
Other Expenses of the Subsidiary	none	[3]
Total Other Expenses	0.32%
Acquired Fund Fees and Expenses	0.03%
Total Annual Fund Operating Expenses	1.91%
Fee Waiver and Expense Reimbursement	(0.05%)	[4]
Total Annual Fund Operating Expenses After Fee Waiver and Expense Reimbursement	1.86%
Class N Shares
Operating Expenses:
Management Fees	0.56%	[1]
Distribution and/or Service (12b-1) Fees	0.48%
Other Expenses of the Fund	0.32%	[2]
Other Expenses of the Subsidiary	none	[3]
Total Other Expenses	0.32%
Acquired Fund Fees and Expenses	0.03%
Total Annual Fund Operating Expenses	1.39%
Fee Waiver and Expense Reimbursement	(0.05%)	[4]
Total Annual Fund Operating Expenses After Fee Waiver and Expense Reimbursement	1.34%
Class Y Shares
Operating Expenses:
Management Fees	0.56%	[1]
Distribution and/or Service (12b-1) Fees	none
Other Expenses of the Fund	0.04%	[2]
Other Expenses of the Subsidiary	none	[3]
Total Other Expenses	0.04%
Acquired Fund Fees and Expenses	0.03%
Total Annual Fund Operating Expenses	0.63%
Fee Waiver and Expense Reimbursement	(0.05%)	[4]
Total Annual Fund Operating Expenses After Fee Waiver and Expense Reimbursement	0.58%

[1] "Management Fees" reflects the gross management fees paid to the Manager by the Fund during the Fund's most recent fiscal year and the estimated gross management fee of the Subsidiary for its first fiscal year.

[2] "Other Expenses of the Fund" have been restated to reflect current fees.

[3] "Other Expenses of the Subsidiary" are based on estimated amounts for its first fiscal year.

[4] The Manager has voluntarily agreed to waive fees and/or reimburse Fund expenses in an amount equal to the indirect management fees incurred through the Fund's investment in Oppenheimer Institutional Money Market Fund. The Fund's transfer agent has voluntarily agreed to limit its fees for all classes to 0.35% of average annual net assets per class. Each of these expense limitations may be amended or withdrawn after one year from the date of this prospectus. The Manager has also contractually agreed to waive the management fee it receives from the Fund in an amount equal to the management fee it receives from the Subsidiary. This waiver will continue in effect for so long as the Fund invests in the Subsidiary, and may not be terminated by the Manager unless termination is approved by the Fund's Board of Trustees.