485BPOS

Registration No. 333-135492

File No. 811-21918

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. 13	x
and/or
REGISTRATION STATEMENT UNDER THE INVESTMENT COMPANY ACT OF 1940	x
Amendment No. 15	x

OPPENHEIMER GLOBAL MULTI STRATEGIES FUND

(Exact Name of Registrant as Specified in Charter)

6803 South Tucson Way, Centennial, Colorado 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, New York 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 12^th day of October 2012.

OPPENHEIMER GLOBAL MULTI STRATEGIES 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
Brian F. Wruble*	Chairman of the	October 12, 2012
Brian F. Wruble	Board of Trustees
William F. Glavin, Jr.*	President, Principal	October 12, 2012
William F. Glavin, Jr.	Executive Officer and Trustee
Brian W. Wixted*	Treasurer, Principal	October 12, 2012
Brian W. Wixted	Financial & Accounting Officer
David K. Downes*	Trustee	October 12, 2012
David K. Downes
Matthew P. Fink*	Trustee	October 12, 2012
Matthew P. Fink
Phillip A. Griffiths*	Trustee	October 12, 2012
Phillip A. Griffiths
Mary F. Miller*	Trustee	October 12, 2012
Mary F. Miller
Joel W. Motley*	Trustee	October 12, 2012
Joel W. Motley
Mary Ann Tynan*	Trustee	October 12, 2012
Mary Ann Tynan
Joseph M. Wikler*	Trustee	October 12, 2012
Joseph M. Wikler
Peter I. Wold*	Trustee	October 12, 2012
Peter I. Wold

*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

XML

Annual Total Returns ((Oppenheimer Global Multi Strategies Fund), (Global Multi Strategies Fund), Class A)	0 Months Ended
	Sep. 26, 2012
(Oppenheimer Global Multi Strategies Fund) | (Global Multi Strategies Fund) | Class A
Bar Chart Table:
Annual Return 2008	(1.45%)
Annual Return 2009	1.21%
Annual Return 2010	6.89%
Annual Return 2011	(8.18%)

XML

(Oppenheimer Global Multi Strategies Fund) | (Global Multi Strategies Fund)

Investment Objective. The Fund seeks total return.

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 18 of the prospectus and in the sections "How to Buy Shares" beginning on page 63 and "Appendix A" in the Fund's Statement of Additional Information.

Shareholder Fees (fees paid directly from your investment)

Shareholder Fees (Oppenheimer Global Multi Strategies Fund) (Global Multi Strategies Fund)	Class A	Class C	Class Y	Class I
Maximum Sales Charge (Load) imposed on purchases (as % of offering price)	5.75%	none	none	none
Maximum Deferred Sales Charge (Load) (as % of the lower of original offering price or redemption proceeds)	none	1.00%	none	none

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

^[1]

Annual Fund Operating Expenses (Oppenheimer Global Multi Strategies Fund) (Global Multi Strategies Fund)		Class A	Class C		Class Y		Class I
Management Fees	[1]	0.91%	0.91%	[2]	0.91%	[2]	0.91%	[2]
Distribution and/or Service (12b-1) Fees	[3]	0.25%	1.00%	[2]	none		none
Acquired Fund Fees and Expenses		0.14%	0.14%	[2]	0.14%	[2]	0.14%	[2]
Other Expenses of the Fund	[3]	0.89%	0.89%	[2]	0.89%	[2]	0.72%	[2]
Other Expenses of the Subsidiary	[4]	0.19%	0.19%	[2]	0.19%	[2]	0.19%	[2]
Total Other Expenses		1.08%	1.08%	[2]	1.08%	[2]	0.91%	[2]
Total Annual Fund Operating Expenses		2.38%	3.13%	[2]	2.13%	[2]	1.96%	[2]
Fee Waiver and/or Expense Reimbursement	[5]	(0.90%)	(0.82%)	[2]	(0.75%)	[2]	(0.73%)	[2]
Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement		1.48%	2.31%	[2]	1.38%	[2]	1.23%	[2]

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 (Global Multi Strategies Fund) (Oppenheimer Global Multi Strategies Fund) (USD $)	1 Year	3 Years	5 Years	10 Years
Class A	718	1,200	1,708	3,099
Class C	337	902	1,592	3,434
Class Y	141	600	1,086	2,428
Class I	126	549	999	2,247

If shares are not redeemed

Expense Example, No Redemption (Global Multi Strategies Fund) (Oppenheimer Global Multi Strategies Fund) (USD $)	1 Year	3 Years	5 Years	10 Years
Class A	718	1,200	1,708	3,099
Class C	237	902	1,592	3,434
Class Y	141	600	1,086	2,428
Class I	126	549	999	2,247

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 253% of the average value of its portfolio.

Principal Investment Strategies. The Fund's investment adviser, OppenheimerFunds, Inc., exercises a flexible strategy in selecting its investments. The flexibility of the Fund's overall strategy derives from its use of multiple quantitative-driven alternative investing strategies in an attempt to generate positive returns while reducing volatility, as currently organized among various themes. These thematic strategies may be generally characterized as:

• Global Macro. This strategy involves investment in instruments across broad asset and/or sector classes.

• Equity Market Neutral. This strategy involves investment in equity securities while seeking to minimize systemic equity risk.

• Fixed-Income Alternatives. This strategy involves investment in sovereign and corporate fixed-income securities as well as fixed-income alternatives (such as event-linked or catastrophe bonds).

• Volatility. This strategy involves investment in options and other derivatives to take advantage of mispricing opportunities in the options markets.

The Fund will generally take long positions in investments that the manager believes to be undervalued and short positions in investments that the manager believes to be overvalued or which are established for hedging purposes. The Fund's overall long or short positioning can vary based on market conditions, and the Fund may take both long and short positions simultaneously.

To implement its flexible strategy, the Fund may invest in a variety of instruments to seek its objective. Mainly, these include:

• Equity Securities. The Fund invests in common stocks of U.S. and foreign companies. Equity investments may include securities of companies of any market capitalization.

• Fixed-Income Securities. The Fund may also invest in fixed-income securities, including bonds and notes or other debt securities issued by U.S. and foreign companies and governments, corporate bonds and money market instruments. The Fund can invest in investment grade or lower-grade, high-yield debt securities. "Investment grade" debt securities are rated in one of the top four rating categories by nationally recognized statistical rating organizations such as Moody's Investors Service or Standard & Poor's. The Fund may also invest in unrated securities, in which case the Fund's investment adviser, OppenheimerFunds, Inc., may internally assign ratings to certain of those securities, after assessing their credit quality, in investment-grade or below-investment-grade categories similar to those of nationally recognized statistical rating organizations. There can be no assurance, nor is it intended, that the Manager's credit analysis is consistent or comparable with the credit analysis process used by a nationally recognized statistical rating organization.

The Fund may also invest in "event-linked" securities (sometimes called "catastrophe" bonds) or in interests in trusts and other pooled entities that invest primarily or exclusively in event-linked securities, including entities sponsored and/or advised by the Manager or an affiliate.

• Derivatives.The Fund may use derivative investments for hedging purposes or speculative purposes (to seek higher investment returns), including futures on equity and commodities indices and interest rate and currency futures, forward rate agreements on currencies, options on equities, currencies and bonds, interest rate swaps, total return swaps, credit default swaps and volatility swaps. The Fund may also sell securities short.

The Fund is not required to allocate its investments among equity securities, fixed-income securities, or derivative investments in any fixed proportion. The Fund may have some or none of its assets invested in each instrument or investment strategy in relative proportions that change over time based on market and economic conditions. The Fund is not limited by any one quantitative model of its multiple investment strategies or by an issuer's location, size, market capitalization or industry sector.

The Fund may invest a substantial portion of its assets (generally, more than half its total assets) in foreign securities, including securities of companies in developing or emerging markets. The Fund, under normal circumstances, will invest in at least three countries (one of which may be the United States). However, the Fund is not required to allocate its investments in any set percentages in any particular countries. The Fund may also invest in shares of real estate investment trusts, including equity REITs, mortgage REITs and hybrid REITs.

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.

The Fund uses an investment process that relies significantly on quantitative models and methods to determine security selection, hedging and asset allocation. While this process and the inter-relationship of the factors used may change over time and its implementation may vary in particular cases, in general the security selection, hedging and asset allocation processes currently involve:

• Bottom Up. The Fund uses "bottom up" models to analyze a wide range of valuation and market factors to determine the relative value of the securities.

• Hedging. The Manager uses risk management models to estimate the Fund's level of risk exposure to major markets. The Manager uses derivatives and other strategies, such as short sales, to hedge the Fund's exposure to these risks.

• Top Down. The Manager uses "top down" models to enable the Fund to adjust the hedges to seek to take advantage of investment opportunities at the asset and sector level.

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.

Management Risk. The investment strategies, techniques and risk analyses, including the quantitative models that may be employed by the Manager, may not produce the desired results. The Manager may be incorrect in its assessment of the value of securities or assessment of market or interest rate trends, which can result in losses to the Fund.

Asset Allocation Risk. Because the Fund typically invests in a combination of securities, the Fund's ability to achieve its investment objective depends largely upon selecting the best mix of investments. There is the risk that the portfolio manager's evaluations and assumptions regarding the equity and fixed-income markets' prospects may be incorrect in view of actual market conditions. During periods of rapidly rising prices, the Fund might not achieve growth in its share prices to the same degree as funds focusing only on stocks. The Fund's investments in stocks may make it more difficult to preserve principal during periods of stock market volatility. The Fund's use of a value or growth style might not be successful when the particular strategy is out of favor.

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 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.

The Fund may also invest in debt securities on which the return is derived primarily from other instruments, such as interest rate swap contracts and currency swap contracts. The Fund may also invest in Eurodollar securities, which are fixed-income securities of a U.S. issuer or a foreign issuer that are issued outside the United States.

Special Risks of Below-Investment-Grade Securities. Below-investment-grade debt securities 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 below-investment-grade securities may be less liquid and they may be harder to value or to sell at an acceptable price, especially during times of market volatility or decline.

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 Sovereign Debt. Sovereign debt instruments are subject to the risk that a governmental entity may delay or refuse, or otherwise be unable, to pay interest or repay principal on its sovereign debt. If a governmental entity defaults, it may ask for more time in which to pay or for further loans. There is no legal process for collecting sovereign debt that a government does not pay nor are there bankruptcy proceedings through which all or part of such sovereign debt may be collected. A restructuring or default of sovereign debt may also cause additional impacts to the financial markets, such as downgrades to credit ratings, a flight to quality debt instruments, disruptions in common trading markets or unions, reduced liquidity, increased volatility, and heightened financial sector, foreign securities and currency risk, among others.

Main Risks of Hedging. The Fund may engage in "hedging" strategies, including short sales, futures and other derivatives in an effort to protect assets from losses due to declines in the value of the Fund's portfolio. There are risks in the use of these investment and trading strategies. There can be no assurance that the hedging strategies used will be successful in avoiding losses, and hedged positions may perform less favorably in generally rising markets than unhedged positions. If the Manager uses a hedging strategy at the wrong time or judges market conditions incorrectly, the strategy could reduce the Fund's return. In some cases, derivatives or other investments may be unavailable, or the Manager may choose not to use them under market conditions when their use, in hindsight, may be determined to have been beneficial to the Fund. No assurance can be given that the Manager will employ hedging strategies with respect to all or any portion of the Fund's assets.

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.

Foreign Currency Risk. Fluctuations in foreign currency values will result in fluctuations in the U.S. dollar value of securities denominated in that foreign currency. If the U.S. dollar rises in value against a foreign currency, a security denominated in that currency will be worth less in U.S. dollars and if the U.S. dollar decreases in value against a foreign currency, a security denominated in that currency will be worth more in U.S. dollars. The dollar value of foreign investments may also be affected by exchange controls.

The portfolio manager's selection of foreign currency denominated investments may not perform as expected. Currency derivative investments may be particularly volatile and subject to greater risks than other types of foreign-currency denominated investments.

Main Risks of Event-Linked Securities. Event-linked securities are fixed income securities for which the return of principal and payment of interest is contingent on the non-occurrence of a trigger event, such as a hurricane, earthquake, or other event that leads to physical or economic loss. If the trigger event occurs prior to maturity, the Fund may lose all or a portion of its principal and additional interest. Event-linked securities may expose the Fund to certain other risks, including issuer default, adverse regulatory or jurisdictional interpretations, liquidity risk and adverse tax consequences.

Main Risks of Short Sales. The Fund will incur a loss as a result of a short sale if the price of the security sold short increases between the date of the short sale and the date on which the Fund closes the short position. A short sale of a security creates the risk of an unlimited loss, since the price of the security sold short could theoretically increase without limit. Purchasing securities previously sold short to close out a short position can itself cause the price of the securities to rise further, thereby increasing the loss. Further, there is no assurance that a security the Fund needs to buy to cover a short position will be available for purchase at a reasonable price. Short sales may cause a higher portfolio turnover rate and increase the Fund's brokerage and other transaction expenses. Short selling is considered a speculative investment practice.

Main Risks of Long/Short Holdings. Under certain conditions, even if the value of the Fund's long positions are rising, this could be offset by declining values of the Fund's short positions. Conversely, it is possible that rising values of the Fund's short positions could be offset by declining values of the Fund's long positions. In either scenario the Fund may experience losses. In a market where the value of both the Fund's long and short positions are declining, the Fund may experience substantial losses.

Main Risks of Small- and Mid-Sized Companies. The stock prices of small- and mid-sized companies may be more volatile and their securities may be more difficult to sell than those of larger companies. They may not have established markets, may have fewer customers and product lines, may have unseasoned management or less management depth and may have more limited access to financial resources. Smaller companies may not pay dividends or provide capital gains for some time, if at all.

Main Risks of Derivative Investments. Derivatives may involve significant risks. Some derivatives have the potential for unlimited loss, regardless of the size of the Fund's initial investment. Derivatives may be illiquid and may be more volatile than other types of investments. Derivative investments can increase portfolio turnover and transaction costs. Derivatives are subject to counter-party credit risk and may lose money if the issuer fails to pay the amounts due.

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 Investing in REITS. Investment in REITs is closely linked to the performance of the real estate markets. Property values or revenues from real estate investments may fall due to a number of factors, including but not limited to disruptions in real estate markets, increased vacancies or declining rents, increased property taxes and other operating costs, low demand or oversupply, the failure of borrowers to repay loans in a timely manner, changes in tax and regulatory requirements and changes in interest rates or rates of inflation. Mortgage REITs are particularly subject to interest rate risks.

REITs are dependent upon management skills and may not be diversified. In addition, REITs are subject to failure to qualify for pass-through of income under applicable tax laws. REITs whose underlying properties are concentrated in a particular industry or geographic region are also subject to risks affecting such industries and regions. By investing in REITs through the Fund, a shareholder will bear expenses of the REITs in addition to expenses of the Fund. REITs generally tend to be small- to mid-cap stocks and are subject to risks of investing in those securities.

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.

Who Is the Fund Designed For? The Fund is designed for investors seeking total return over the long term. Those investors should be willing to assume the risks of short-term price fluctuations that are typical for a fund that includes equity, debt securities (particularly high yield debt securities), foreign securities, and derivative investments. The Fund is not a complete investment program. You should carefully consider your own investment goals and risk tolerance before investing.

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 (for Class A shares) from year to year and by showing how the Fund's average annual returns for one year and the life of the Fund compare with those of two broad measures 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/GlobalMultiStrategiesFund

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 4.98% (4th Qtr 10) and the lowest return was -5.99% (3rd Qtr 11). For the period from January 1, 2012 through June 30, 2012, the cumulative return before taxes was -0.56%.

Average Annual Total Returns for the periods ended December 31, 2011

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.

Performance information for Classes C, Y and I shares will be provided after those shares have one full calendar year of performance.

Average Annual Total Returns (Global Multi Strategies Fund) (Oppenheimer Global Multi Strategies Fund)	Inception Date	1 Year	5 Years (or life of class, if less)
Class A	Mar. 05, 2007	(13.46%)	(1.19%)
Class A Return After Taxes on Distributions		(14.72%)	(2.08%)
Class A Return After Taxes on Distributions and Sale of Fund Shares		(8.75%)	(1.33%)
Barclays Capital Global Aggregate Bond Index		5.64%	6.46%	[1]
S&P 500 Index		2.11%	(0.25%)	[1]

[1] "Management Fees" reflects the management fee paid to the Manager by the Fund and the estimated gross management fee of the Subsidiary for its first full fiscal year.

[2] Estimated expenses for the first full fiscal year that these classes were offered. Classes C, Y and I were first available as of January 27, 2012.

[3] Expenses have been restated to reflect anticipated fees.

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

[5] The Manager has voluntarily agreed to waive fees and/or reimburse the Fund for certain expenses in order to limit "Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement" (excluding any applicable dividend expense, taxes, interest and fees from borrowing, any subsidiary expenses, Acquired Fund Fees and Expenses, brokerage commissions, extraordinary expenses and certain other Fund expenses) to annual rates of 1.25% for Class A shares, 2.08% for Class C shares, 1.15% for Class Y shares and 1.00% for Class I shares as calculated on the daily net assets of the Fund. The Manager has also voluntarily agreed to waive fees and/or reimburse Fund expenses in an amount equal to the indirect management fees incurred through the Fund's investments in funds managed by the Manager or its affiliates. Each of these expense limitations may not be amended or withdrawn until 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 02/28/07.

[1] Expenses have been restated to reflect anticipated fees.

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Shareholder Fees ((Oppenheimer Global Multi Strategies Fund), (Global Multi Strategies Fund))	0 Months Ended
	Sep. 26, 2012
Class A
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 C
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 I
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
Class Y
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

XML

(Oppenheimer Global Multi Strategies Fund) | (Global Multi Strategies Fund)

Investment Objective. The Fund seeks total return.

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 18 of the prospectus and in the sections "How to Buy Shares" beginning on page 63 and "Appendix A" in the Fund's Statement of Additional Information.

Shareholder Fees (fees paid directly from your investment)

Shareholder Fees (Oppenheimer Global Multi Strategies Fund) (Global Multi Strategies Fund)	Class A	Class C	Class Y	Class I
Maximum Sales Charge (Load) imposed on purchases (as % of offering price)	5.75%	none	none	none
Maximum Deferred Sales Charge (Load) (as % of the lower of original offering price or redemption proceeds)	none	1.00%	none	none

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

^[1]

Annual Fund Operating Expenses (Oppenheimer Global Multi Strategies Fund) (Global Multi Strategies Fund)		Class A	Class C		Class Y		Class I
Management Fees	[1]	0.91%	0.91%	[2]	0.91%	[2]	0.91%	[2]
Distribution and/or Service (12b-1) Fees	[3]	0.25%	1.00%	[2]	none		none
Acquired Fund Fees and Expenses		0.14%	0.14%	[2]	0.14%	[2]	0.14%	[2]
Other Expenses of the Fund	[3]	0.89%	0.89%	[2]	0.89%	[2]	0.72%	[2]
Other Expenses of the Subsidiary	[4]	0.19%	0.19%	[2]	0.19%	[2]	0.19%	[2]
Total Other Expenses		1.08%	1.08%	[2]	1.08%	[2]	0.91%	[2]
Total Annual Fund Operating Expenses		2.38%	3.13%	[2]	2.13%	[2]	1.96%	[2]
Fee Waiver and/or Expense Reimbursement	[5]	(0.90%)	(0.82%)	[2]	(0.75%)	[2]	(0.73%)	[2]
Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement		1.48%	2.31%	[2]	1.38%	[2]	1.23%	[2]

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 (Global Multi Strategies Fund) (Oppenheimer Global Multi Strategies Fund) (USD $)	1 Year	3 Years	5 Years	10 Years
Class A	718	1,200	1,708	3,099
Class C	337	902	1,592	3,434
Class Y	141	600	1,086	2,428
Class I	126	549	999	2,247

If shares are not redeemed

Expense Example, No Redemption (Global Multi Strategies Fund) (Oppenheimer Global Multi Strategies Fund) (USD $)	1 Year	3 Years	5 Years	10 Years
Class A	718	1,200	1,708	3,099
Class C	237	902	1,592	3,434
Class Y	141	600	1,086	2,428
Class I	126	549	999	2,247

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 253% of the average value of its portfolio.

Principal Investment Strategies. The Fund's investment adviser, OppenheimerFunds, Inc., exercises a flexible strategy in selecting its investments. The flexibility of the Fund's overall strategy derives from its use of multiple quantitative-driven alternative investing strategies in an attempt to generate positive returns while reducing volatility, as currently organized among various themes. These thematic strategies may be generally characterized as:

• Global Macro. This strategy involves investment in instruments across broad asset and/or sector classes.

• Equity Market Neutral. This strategy involves investment in equity securities while seeking to minimize systemic equity risk.

• Fixed-Income Alternatives. This strategy involves investment in sovereign and corporate fixed-income securities as well as fixed-income alternatives (such as event-linked or catastrophe bonds).

• Volatility. This strategy involves investment in options and other derivatives to take advantage of mispricing opportunities in the options markets.

The Fund will generally take long positions in investments that the manager believes to be undervalued and short positions in investments that the manager believes to be overvalued or which are established for hedging purposes. The Fund's overall long or short positioning can vary based on market conditions, and the Fund may take both long and short positions simultaneously.

To implement its flexible strategy, the Fund may invest in a variety of instruments to seek its objective. Mainly, these include:

• Equity Securities. The Fund invests in common stocks of U.S. and foreign companies. Equity investments may include securities of companies of any market capitalization.

• Fixed-Income Securities. The Fund may also invest in fixed-income securities, including bonds and notes or other debt securities issued by U.S. and foreign companies and governments, corporate bonds and money market instruments. The Fund can invest in investment grade or lower-grade, high-yield debt securities. "Investment grade" debt securities are rated in one of the top four rating categories by nationally recognized statistical rating organizations such as Moody's Investors Service or Standard & Poor's. The Fund may also invest in unrated securities, in which case the Fund's investment adviser, OppenheimerFunds, Inc., may internally assign ratings to certain of those securities, after assessing their credit quality, in investment-grade or below-investment-grade categories similar to those of nationally recognized statistical rating organizations. There can be no assurance, nor is it intended, that the Manager's credit analysis is consistent or comparable with the credit analysis process used by a nationally recognized statistical rating organization.

The Fund may also invest in "event-linked" securities (sometimes called "catastrophe" bonds) or in interests in trusts and other pooled entities that invest primarily or exclusively in event-linked securities, including entities sponsored and/or advised by the Manager or an affiliate.

• Derivatives.The Fund may use derivative investments for hedging purposes or speculative purposes (to seek higher investment returns), including futures on equity and commodities indices and interest rate and currency futures, forward rate agreements on currencies, options on equities, currencies and bonds, interest rate swaps, total return swaps, credit default swaps and volatility swaps. The Fund may also sell securities short.

The Fund is not required to allocate its investments among equity securities, fixed-income securities, or derivative investments in any fixed proportion. The Fund may have some or none of its assets invested in each instrument or investment strategy in relative proportions that change over time based on market and economic conditions. The Fund is not limited by any one quantitative model of its multiple investment strategies or by an issuer's location, size, market capitalization or industry sector.

The Fund may invest a substantial portion of its assets (generally, more than half its total assets) in foreign securities, including securities of companies in developing or emerging markets. The Fund, under normal circumstances, will invest in at least three countries (one of which may be the United States). However, the Fund is not required to allocate its investments in any set percentages in any particular countries. The Fund may also invest in shares of real estate investment trusts, including equity REITs, mortgage REITs and hybrid REITs.

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.

The Fund uses an investment process that relies significantly on quantitative models and methods to determine security selection, hedging and asset allocation. While this process and the inter-relationship of the factors used may change over time and its implementation may vary in particular cases, in general the security selection, hedging and asset allocation processes currently involve:

• Bottom Up. The Fund uses "bottom up" models to analyze a wide range of valuation and market factors to determine the relative value of the securities.

• Hedging. The Manager uses risk management models to estimate the Fund's level of risk exposure to major markets. The Manager uses derivatives and other strategies, such as short sales, to hedge the Fund's exposure to these risks.

• Top Down. The Manager uses "top down" models to enable the Fund to adjust the hedges to seek to take advantage of investment opportunities at the asset and sector level.

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.

Management Risk. The investment strategies, techniques and risk analyses, including the quantitative models that may be employed by the Manager, may not produce the desired results. The Manager may be incorrect in its assessment of the value of securities or assessment of market or interest rate trends, which can result in losses to the Fund.

Asset Allocation Risk. Because the Fund typically invests in a combination of securities, the Fund's ability to achieve its investment objective depends largely upon selecting the best mix of investments. There is the risk that the portfolio manager's evaluations and assumptions regarding the equity and fixed-income markets' prospects may be incorrect in view of actual market conditions. During periods of rapidly rising prices, the Fund might not achieve growth in its share prices to the same degree as funds focusing only on stocks. The Fund's investments in stocks may make it more difficult to preserve principal during periods of stock market volatility. The Fund's use of a value or growth style might not be successful when the particular strategy is out of favor.

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 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.

The Fund may also invest in debt securities on which the return is derived primarily from other instruments, such as interest rate swap contracts and currency swap contracts. The Fund may also invest in Eurodollar securities, which are fixed-income securities of a U.S. issuer or a foreign issuer that are issued outside the United States.

Special Risks of Below-Investment-Grade Securities. Below-investment-grade debt securities 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 below-investment-grade securities may be less liquid and they may be harder to value or to sell at an acceptable price, especially during times of market volatility or decline.

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 Sovereign Debt. Sovereign debt instruments are subject to the risk that a governmental entity may delay or refuse, or otherwise be unable, to pay interest or repay principal on its sovereign debt. If a governmental entity defaults, it may ask for more time in which to pay or for further loans. There is no legal process for collecting sovereign debt that a government does not pay nor are there bankruptcy proceedings through which all or part of such sovereign debt may be collected. A restructuring or default of sovereign debt may also cause additional impacts to the financial markets, such as downgrades to credit ratings, a flight to quality debt instruments, disruptions in common trading markets or unions, reduced liquidity, increased volatility, and heightened financial sector, foreign securities and currency risk, among others.

Main Risks of Hedging. The Fund may engage in "hedging" strategies, including short sales, futures and other derivatives in an effort to protect assets from losses due to declines in the value of the Fund's portfolio. There are risks in the use of these investment and trading strategies. There can be no assurance that the hedging strategies used will be successful in avoiding losses, and hedged positions may perform less favorably in generally rising markets than unhedged positions. If the Manager uses a hedging strategy at the wrong time or judges market conditions incorrectly, the strategy could reduce the Fund's return. In some cases, derivatives or other investments may be unavailable, or the Manager may choose not to use them under market conditions when their use, in hindsight, may be determined to have been beneficial to the Fund. No assurance can be given that the Manager will employ hedging strategies with respect to all or any portion of the Fund's assets.

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.

Foreign Currency Risk. Fluctuations in foreign currency values will result in fluctuations in the U.S. dollar value of securities denominated in that foreign currency. If the U.S. dollar rises in value against a foreign currency, a security denominated in that currency will be worth less in U.S. dollars and if the U.S. dollar decreases in value against a foreign currency, a security denominated in that currency will be worth more in U.S. dollars. The dollar value of foreign investments may also be affected by exchange controls.

The portfolio manager's selection of foreign currency denominated investments may not perform as expected. Currency derivative investments may be particularly volatile and subject to greater risks than other types of foreign-currency denominated investments.

Main Risks of Event-Linked Securities. Event-linked securities are fixed income securities for which the return of principal and payment of interest is contingent on the non-occurrence of a trigger event, such as a hurricane, earthquake, or other event that leads to physical or economic loss. If the trigger event occurs prior to maturity, the Fund may lose all or a portion of its principal and additional interest. Event-linked securities may expose the Fund to certain other risks, including issuer default, adverse regulatory or jurisdictional interpretations, liquidity risk and adverse tax consequences.

Main Risks of Short Sales. The Fund will incur a loss as a result of a short sale if the price of the security sold short increases between the date of the short sale and the date on which the Fund closes the short position. A short sale of a security creates the risk of an unlimited loss, since the price of the security sold short could theoretically increase without limit. Purchasing securities previously sold short to close out a short position can itself cause the price of the securities to rise further, thereby increasing the loss. Further, there is no assurance that a security the Fund needs to buy to cover a short position will be available for purchase at a reasonable price. Short sales may cause a higher portfolio turnover rate and increase the Fund's brokerage and other transaction expenses. Short selling is considered a speculative investment practice.

Main Risks of Long/Short Holdings. Under certain conditions, even if the value of the Fund's long positions are rising, this could be offset by declining values of the Fund's short positions. Conversely, it is possible that rising values of the Fund's short positions could be offset by declining values of the Fund's long positions. In either scenario the Fund may experience losses. In a market where the value of both the Fund's long and short positions are declining, the Fund may experience substantial losses.

Main Risks of Small- and Mid-Sized Companies. The stock prices of small- and mid-sized companies may be more volatile and their securities may be more difficult to sell than those of larger companies. They may not have established markets, may have fewer customers and product lines, may have unseasoned management or less management depth and may have more limited access to financial resources. Smaller companies may not pay dividends or provide capital gains for some time, if at all.

Main Risks of Derivative Investments. Derivatives may involve significant risks. Some derivatives have the potential for unlimited loss, regardless of the size of the Fund's initial investment. Derivatives may be illiquid and may be more volatile than other types of investments. Derivative investments can increase portfolio turnover and transaction costs. Derivatives are subject to counter-party credit risk and may lose money if the issuer fails to pay the amounts due.

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 Investing in REITS. Investment in REITs is closely linked to the performance of the real estate markets. Property values or revenues from real estate investments may fall due to a number of factors, including but not limited to disruptions in real estate markets, increased vacancies or declining rents, increased property taxes and other operating costs, low demand or oversupply, the failure of borrowers to repay loans in a timely manner, changes in tax and regulatory requirements and changes in interest rates or rates of inflation. Mortgage REITs are particularly subject to interest rate risks.

REITs are dependent upon management skills and may not be diversified. In addition, REITs are subject to failure to qualify for pass-through of income under applicable tax laws. REITs whose underlying properties are concentrated in a particular industry or geographic region are also subject to risks affecting such industries and regions. By investing in REITs through the Fund, a shareholder will bear expenses of the REITs in addition to expenses of the Fund. REITs generally tend to be small- to mid-cap stocks and are subject to risks of investing in those securities.

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.

Who Is the Fund Designed For? The Fund is designed for investors seeking total return over the long term. Those investors should be willing to assume the risks of short-term price fluctuations that are typical for a fund that includes equity, debt securities (particularly high yield debt securities), foreign securities, and derivative investments. The Fund is not a complete investment program. You should carefully consider your own investment goals and risk tolerance before investing.

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 (for Class A shares) from year to year and by showing how the Fund's average annual returns for one year and the life of the Fund compare with those of two broad measures 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/GlobalMultiStrategiesFund

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 4.98% (4th Qtr 10) and the lowest return was -5.99% (3rd Qtr 11). For the period from January 1, 2012 through June 30, 2012, the cumulative return before taxes was -0.56%.

Average Annual Total Returns for the periods ended December 31, 2011

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.

Performance information for Classes C, Y and I shares will be provided after those shares have one full calendar year of performance.

Average Annual Total Returns (Global Multi Strategies Fund) (Oppenheimer Global Multi Strategies Fund)	Inception Date	1 Year	5 Years (or life of class, if less)
Class A	Mar. 05, 2007	(13.46%)	(1.19%)
Class A Return After Taxes on Distributions		(14.72%)	(2.08%)
Class A Return After Taxes on Distributions and Sale of Fund Shares		(8.75%)	(1.33%)
Barclays Capital Global Aggregate Bond Index		5.64%	6.46%	[1]
S&P 500 Index		2.11%	(0.25%)	[1]

[1] "Management Fees" reflects the management fee paid to the Manager by the Fund and the estimated gross management fee of the Subsidiary for its first full fiscal year.

[2] Estimated expenses for the first full fiscal year that these classes were offered. Classes C, Y and I were first available as of January 27, 2012.

[3] Expenses have been restated to reflect anticipated fees.

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

[5] The Manager has voluntarily agreed to waive fees and/or reimburse the Fund for certain expenses in order to limit "Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement" (excluding any applicable dividend expense, taxes, interest and fees from borrowing, any subsidiary expenses, Acquired Fund Fees and Expenses, brokerage commissions, extraordinary expenses and certain other Fund expenses) to annual rates of 1.25% for Class A shares, 2.08% for Class C shares, 1.15% for Class Y shares and 1.00% for Class I shares as calculated on the daily net assets of the Fund. The Manager has also voluntarily agreed to waive fees and/or reimburse Fund expenses in an amount equal to the indirect management fees incurred through the Fund's investments in funds managed by the Manager or its affiliates. Each of these expense limitations may not be amended or withdrawn until 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 02/28/07.

[1] Expenses have been restated to reflect anticipated fees.

XML

Average Annual Total Returns ((Oppenheimer Global Multi Strategies Fund), (Global Multi Strategies Fund))	0 Months Ended
	Sep. 26, 2012
S&P 500 Index
Average Annual Return:
1 Year	2.11%
5 Years (or life of class, if less)	(0.25%)	[1]
Barclays Capital Global Aggregate Bond Index
Average Annual Return:
1 Year	5.64%
5 Years (or life of class, if less)	6.46%	[1]
Class A
Average Annual Return:
1 Year	(13.46%)
5 Years (or life of class, if less)	(1.19%)
Inception Date	Mar. 05, 2007
Class A | Return After Taxes on Distributions
Average Annual Return:
1 Year	(14.72%)
5 Years (or life of class, if less)	(2.08%)
Class A | Return After Taxes on Distributions and Sale of Fund Shares
Average Annual Return:
1 Year	(8.75%)
5 Years (or life of class, if less)	(1.33%)

[1] From 02/28/07.

XML

Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Document Type

dei_DocumentType

485BPOS

Document Period End Date

dei_DocumentPeriodEndDate

May 31, 2012

Registrant Name

dei_EntityRegistrantName

Oppenheimer Global Multi Strategies Fund

Central Index Key

dei_EntityCentralIndexKey

0001368083

Amendment Flag

dei_AmendmentFlag

false

Document Creation Date

dei_DocumentCreationDate

Sep. 28, 2012

Document Effective Date

dei_DocumentEffectiveDate

Sep. 28, 2012

Prospectus Date

rr_ProspectusDate

Sep. 26, 2012

(Oppenheimer Global Multi Strategies Fund) | (Global Multi Strategies Fund)

Risk/Return:

rr_RiskReturnAbstract

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

Investment Objective. The Fund seeks total return.

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 18 of the prospectus and in the sections "How to Buy Shares" beginning on page 63 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]

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 253% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

253.00%

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]

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If shares are redeemed

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

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If shares are not redeemed

Strategy Narrative [Text Block]

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Principal Investment Strategies. The Fund's investment adviser, OppenheimerFunds, Inc., exercises a flexible strategy in selecting its investments. The flexibility of the Fund's overall strategy derives from its use of multiple quantitative-driven alternative investing strategies in an attempt to generate positive returns while reducing volatility, as currently organized among various themes. These thematic strategies may be generally characterized as:

• Global Macro. This strategy involves investment in instruments across broad asset and/or sector classes.

• Equity Market Neutral. This strategy involves investment in equity securities while seeking to minimize systemic equity risk.

• Fixed-Income Alternatives. This strategy involves investment in sovereign and corporate fixed-income securities as well as fixed-income alternatives (such as event-linked or catastrophe bonds).

• Volatility. This strategy involves investment in options and other derivatives to take advantage of mispricing opportunities in the options markets.

The Fund will generally take long positions in investments that the manager believes to be undervalued and short positions in investments that the manager believes to be overvalued or which are established for hedging purposes. The Fund's overall long or short positioning can vary based on market conditions, and the Fund may take both long and short positions simultaneously.

To implement its flexible strategy, the Fund may invest in a variety of instruments to seek its objective. Mainly, these include:

• Equity Securities. The Fund invests in common stocks of U.S. and foreign companies. Equity investments may include securities of companies of any market capitalization.

• Fixed-Income Securities. The Fund may also invest in fixed-income securities, including bonds and notes or other debt securities issued by U.S. and foreign companies and governments, corporate bonds and money market instruments. The Fund can invest in investment grade or lower-grade, high-yield debt securities. "Investment grade" debt securities are rated in one of the top four rating categories by nationally recognized statistical rating organizations such as Moody's Investors Service or Standard & Poor's. The Fund may also invest in unrated securities, in which case the Fund's investment adviser, OppenheimerFunds, Inc., may internally assign ratings to certain of those securities, after assessing their credit quality, in investment-grade or below-investment-grade categories similar to those of nationally recognized statistical rating organizations. There can be no assurance, nor is it intended, that the Manager's credit analysis is consistent or comparable with the credit analysis process used by a nationally recognized statistical rating organization.

The Fund may also invest in "event-linked" securities (sometimes called "catastrophe" bonds) or in interests in trusts and other pooled entities that invest primarily or exclusively in event-linked securities, including entities sponsored and/or advised by the Manager or an affiliate.

• Derivatives.The Fund may use derivative investments for hedging purposes or speculative purposes (to seek higher investment returns), including futures on equity and commodities indices and interest rate and currency futures, forward rate agreements on currencies, options on equities, currencies and bonds, interest rate swaps, total return swaps, credit default swaps and volatility swaps. The Fund may also sell securities short.

The Fund is not required to allocate its investments among equity securities, fixed-income securities, or derivative investments in any fixed proportion. The Fund may have some or none of its assets invested in each instrument or investment strategy in relative proportions that change over time based on market and economic conditions. The Fund is not limited by any one quantitative model of its multiple investment strategies or by an issuer's location, size, market capitalization or industry sector.

The Fund may invest a substantial portion of its assets (generally, more than half its total assets) in foreign securities, including securities of companies in developing or emerging markets. The Fund, under normal circumstances, will invest in at least three countries (one of which may be the United States). However, the Fund is not required to allocate its investments in any set percentages in any particular countries. The Fund may also invest in shares of real estate investment trusts, including equity REITs, mortgage REITs and hybrid REITs.

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.

The Fund uses an investment process that relies significantly on quantitative models and methods to determine security selection, hedging and asset allocation. While this process and the inter-relationship of the factors used may change over time and its implementation may vary in particular cases, in general the security selection, hedging and asset allocation processes currently involve:

• Bottom Up. The Fund uses "bottom up" models to analyze a wide range of valuation and market factors to determine the relative value of the securities.

• Hedging. The Manager uses risk management models to estimate the Fund's level of risk exposure to major markets. The Manager uses derivatives and other strategies, such as short sales, to hedge the Fund's exposure to these risks.

• Top Down. The Manager uses "top down" models to enable the Fund to adjust the hedges to seek to take advantage of investment opportunities at the asset and sector level.

Risk Narrative [Text Block]

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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.

Management Risk. The investment strategies, techniques and risk analyses, including the quantitative models that may be employed by the Manager, may not produce the desired results. The Manager may be incorrect in its assessment of the value of securities or assessment of market or interest rate trends, which can result in losses to the Fund.

Asset Allocation Risk. Because the Fund typically invests in a combination of securities, the Fund's ability to achieve its investment objective depends largely upon selecting the best mix of investments. There is the risk that the portfolio manager's evaluations and assumptions regarding the equity and fixed-income markets' prospects may be incorrect in view of actual market conditions. During periods of rapidly rising prices, the Fund might not achieve growth in its share prices to the same degree as funds focusing only on stocks. The Fund's investments in stocks may make it more difficult to preserve principal during periods of stock market volatility. The Fund's use of a value or growth style might not be successful when the particular strategy is out of favor.

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 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.

The Fund may also invest in debt securities on which the return is derived primarily from other instruments, such as interest rate swap contracts and currency swap contracts. The Fund may also invest in Eurodollar securities, which are fixed-income securities of a U.S. issuer or a foreign issuer that are issued outside the United States.

Special Risks of Below-Investment-Grade Securities. Below-investment-grade debt securities 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 below-investment-grade securities may be less liquid and they may be harder to value or to sell at an acceptable price, especially during times of market volatility or decline.

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 Sovereign Debt. Sovereign debt instruments are subject to the risk that a governmental entity may delay or refuse, or otherwise be unable, to pay interest or repay principal on its sovereign debt. If a governmental entity defaults, it may ask for more time in which to pay or for further loans. There is no legal process for collecting sovereign debt that a government does not pay nor are there bankruptcy proceedings through which all or part of such sovereign debt may be collected. A restructuring or default of sovereign debt may also cause additional impacts to the financial markets, such as downgrades to credit ratings, a flight to quality debt instruments, disruptions in common trading markets or unions, reduced liquidity, increased volatility, and heightened financial sector, foreign securities and currency risk, among others.

Main Risks of Hedging. The Fund may engage in "hedging" strategies, including short sales, futures and other derivatives in an effort to protect assets from losses due to declines in the value of the Fund's portfolio. There are risks in the use of these investment and trading strategies. There can be no assurance that the hedging strategies used will be successful in avoiding losses, and hedged positions may perform less favorably in generally rising markets than unhedged positions. If the Manager uses a hedging strategy at the wrong time or judges market conditions incorrectly, the strategy could reduce the Fund's return. In some cases, derivatives or other investments may be unavailable, or the Manager may choose not to use them under market conditions when their use, in hindsight, may be determined to have been beneficial to the Fund. No assurance can be given that the Manager will employ hedging strategies with respect to all or any portion of the Fund's assets.

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.

Foreign Currency Risk. Fluctuations in foreign currency values will result in fluctuations in the U.S. dollar value of securities denominated in that foreign currency. If the U.S. dollar rises in value against a foreign currency, a security denominated in that currency will be worth less in U.S. dollars and if the U.S. dollar decreases in value against a foreign currency, a security denominated in that currency will be worth more in U.S. dollars. The dollar value of foreign investments may also be affected by exchange controls.

The portfolio manager's selection of foreign currency denominated investments may not perform as expected. Currency derivative investments may be particularly volatile and subject to greater risks than other types of foreign-currency denominated investments.

Main Risks of Event-Linked Securities. Event-linked securities are fixed income securities for which the return of principal and payment of interest is contingent on the non-occurrence of a trigger event, such as a hurricane, earthquake, or other event that leads to physical or economic loss. If the trigger event occurs prior to maturity, the Fund may lose all or a portion of its principal and additional interest. Event-linked securities may expose the Fund to certain other risks, including issuer default, adverse regulatory or jurisdictional interpretations, liquidity risk and adverse tax consequences.

Main Risks of Short Sales. The Fund will incur a loss as a result of a short sale if the price of the security sold short increases between the date of the short sale and the date on which the Fund closes the short position. A short sale of a security creates the risk of an unlimited loss, since the price of the security sold short could theoretically increase without limit. Purchasing securities previously sold short to close out a short position can itself cause the price of the securities to rise further, thereby increasing the loss. Further, there is no assurance that a security the Fund needs to buy to cover a short position will be available for purchase at a reasonable price. Short sales may cause a higher portfolio turnover rate and increase the Fund's brokerage and other transaction expenses. Short selling is considered a speculative investment practice.

Main Risks of Long/Short Holdings. Under certain conditions, even if the value of the Fund's long positions are rising, this could be offset by declining values of the Fund's short positions. Conversely, it is possible that rising values of the Fund's short positions could be offset by declining values of the Fund's long positions. In either scenario the Fund may experience losses. In a market where the value of both the Fund's long and short positions are declining, the Fund may experience substantial losses.

Main Risks of Small- and Mid-Sized Companies. The stock prices of small- and mid-sized companies may be more volatile and their securities may be more difficult to sell than those of larger companies. They may not have established markets, may have fewer customers and product lines, may have unseasoned management or less management depth and may have more limited access to financial resources. Smaller companies may not pay dividends or provide capital gains for some time, if at all.

Main Risks of Derivative Investments. Derivatives may involve significant risks. Some derivatives have the potential for unlimited loss, regardless of the size of the Fund's initial investment. Derivatives may be illiquid and may be more volatile than other types of investments. Derivative investments can increase portfolio turnover and transaction costs. Derivatives are subject to counter-party credit risk and may lose money if the issuer fails to pay the amounts due.

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 Investing in REITS. Investment in REITs is closely linked to the performance of the real estate markets. Property values or revenues from real estate investments may fall due to a number of factors, including but not limited to disruptions in real estate markets, increased vacancies or declining rents, increased property taxes and other operating costs, low demand or oversupply, the failure of borrowers to repay loans in a timely manner, changes in tax and regulatory requirements and changes in interest rates or rates of inflation. Mortgage REITs are particularly subject to interest rate risks.

REITs are dependent upon management skills and may not be diversified. In addition, REITs are subject to failure to qualify for pass-through of income under applicable tax laws. REITs whose underlying properties are concentrated in a particular industry or geographic region are also subject to risks affecting such industries and regions. By investing in REITs through the Fund, a shareholder will bear expenses of the REITs in addition to expenses of the Fund. REITs generally tend to be small- to mid-cap stocks and are subject to risks of investing in those securities.

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.

Who Is the Fund Designed For? The Fund is designed for investors seeking total return over the long term. Those investors should be willing to assume the risks of short-term price fluctuations that are typical for a fund that includes equity, debt securities (particularly high yield debt securities), foreign securities, and derivative investments. The Fund is not a complete investment program. You should carefully consider your own investment goals and risk tolerance before investing.

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]

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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]

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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]

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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 year to year and by showing how the Fund's average annual returns for one year and the life of the Fund compare with those of two broad measures 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/GlobalMultiStrategiesFund

Performance Availability Website Address [Text]

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https://www.oppenheimerfunds.com/fund/GlobalMultiStrategiesFund

Performance Past Does Not Indicate Future [Text]

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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]

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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 4.98% (4th Qtr 10) and the lowest return was -5.99% (3rd Qtr 11). For the period from January 1, 2012 through June 30, 2012, the cumulative return before taxes was -0.56%.

Performance Table Heading

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Average Annual Total Returns for the periods ended December 31, 2011

Performance Table Uses Highest Federal Rate

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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

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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]

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

Performance Table Narrative

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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.

Performance information for Classes C, Y and I shares will be provided after those shares have one full calendar year of performance.

(Oppenheimer Global Multi Strategies Fund) | (Global Multi Strategies Fund) | S&P 500 Index

Risk/Return:

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1 Year

rr_AverageAnnualReturnYear01

2.11%

5 Years (or life of class, if less)

rr_AverageAnnualReturnYear05

(0.25%)

^[6]

(Oppenheimer Global Multi Strategies Fund) | (Global Multi Strategies Fund) | Barclays Capital Global Aggregate Bond Index

Risk/Return:

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1 Year

rr_AverageAnnualReturnYear01

5.64%

5 Years (or life of class, if less)

rr_AverageAnnualReturnYear05

6.46%

^[6]

(Oppenheimer Global Multi Strategies Fund) | (Global Multi Strategies Fund) | Class A

Risk/Return:

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Maximum Sales Charge (Load) imposed on purchases (as % of offering price)

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5.75%

Maximum Deferred Sales Charge (Load) (as % of the lower of original offering price or redemption proceeds)

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none

Management Fees

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0.91%

^[2]

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

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0.25%

^[1]

Other Expenses of the Fund

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0.89%

^[1]

Other Expenses of the Subsidiary

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0.19%

^[4]

Total Other Expenses

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1.08%

Acquired Fund Fees and Expenses

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0.14%

Total Annual Fund Operating Expenses

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2.38%

Fee Waiver and/or Expense Reimbursement

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(0.90%)

^[5]

Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement

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1.48%

Expense Example, with Redemption, 1 Year

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718

Expense Example, with Redemption, 3 Years

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1,200

Expense Example, with Redemption, 5 Years

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1,708

Expense Example, with Redemption, 10 Years

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3,099

Expense Example, No Redemption, 1 Year

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718

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

1,200

Expense Example, No Redemption, 5 Years

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1,708

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

3,099

Annual Return 2008

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(1.45%)

Annual Return 2009

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1.21%

Annual Return 2010

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6.89%

Annual Return 2011

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(8.18%)

Year to Date Return, Label

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For the period from January 1, 2012 through June 30, 2012, the cumulative return before taxes was -0.56%.

Bar Chart, Year to Date Return, Date

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Jun. 30, 2012

Bar Chart, Year to Date Return

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(0.56%)

Highest Quarterly Return, Label

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highest return for a calendar quarter was 4.98% (4th Qtr 10)

Highest Quarterly Return

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4.98%

Lowest Quarterly Return, Label

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lowest return was -5.99% (3rd Qtr 11)

Lowest Quarterly Return

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(5.99%)

1 Year

rr_AverageAnnualReturnYear01

(13.46%)

5 Years (or life of class, if less)

rr_AverageAnnualReturnYear05

(1.19%)

Inception Date

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Mar. 05, 2007

(Oppenheimer Global Multi Strategies Fund) | (Global Multi Strategies Fund) | Class A | Return After Taxes on Distributions

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

(14.72%)

5 Years (or life of class, if less)

rr_AverageAnnualReturnYear05

(2.08%)

(Oppenheimer Global Multi Strategies Fund) | (Global Multi Strategies Fund) | Class A | Return After Taxes on Distributions and Sale of Fund Shares

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

(8.75%)

5 Years (or life of class, if less)

rr_AverageAnnualReturnYear05

(1.33%)

(Oppenheimer Global Multi Strategies Fund) | (Global Multi Strategies Fund) | 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

0.91%

^[2],[3]

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

rr_DistributionAndService12b1FeesOverAssets

1.00%

^[1],[3]

Other Expenses of the Fund

rr_Component1OtherExpensesOverAssets

0.89%

^[1],[3]

Other Expenses of the Subsidiary

rr_Component2OtherExpensesOverAssets

0.19%

^[3],[4]

Total Other Expenses

rr_OtherExpensesOverAssets

1.08%

^[3]

Acquired Fund Fees and Expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.14%

^[3]

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

3.13%

^[3]

Fee Waiver and/or Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.82%)

^[3],[5]

Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement

rr_NetExpensesOverAssets

2.31%

^[3]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

337

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

902

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

1,592

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

3,434

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

237

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

902

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

1,592

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

3,434

(Oppenheimer Global Multi Strategies Fund) | (Global Multi Strategies Fund) | 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

0.91%

^[2],[3]

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

rr_DistributionAndService12b1FeesOverAssets

none

^[1]

Other Expenses of the Fund

rr_Component1OtherExpensesOverAssets

0.72%

^[1],[3]

Other Expenses of the Subsidiary

rr_Component2OtherExpensesOverAssets

0.19%

^[3],[4]

Total Other Expenses

rr_OtherExpensesOverAssets

0.91%

^[3]

Acquired Fund Fees and Expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.14%

^[3]

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

1.96%

^[3]

Fee Waiver and/or Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.73%)

^[3],[5]

Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement

rr_NetExpensesOverAssets

1.23%

^[3]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

126

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

549

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

999

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

2,247

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

126

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

549

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

999

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

2,247

(Oppenheimer Global Multi Strategies Fund) | (Global Multi Strategies Fund) | 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

0.91%

^[2],[3]

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

rr_DistributionAndService12b1FeesOverAssets

none

^[1]

Other Expenses of the Fund

rr_Component1OtherExpensesOverAssets

0.89%

^[1],[3]

Other Expenses of the Subsidiary

rr_Component2OtherExpensesOverAssets

0.19%

^[3],[4]

Total Other Expenses

rr_OtherExpensesOverAssets

1.08%

^[3]

Acquired Fund Fees and Expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.14%

^[3]

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

2.13%

^[3]

Fee Waiver and/or Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.75%)

^[3],[5]

Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement

rr_NetExpensesOverAssets

1.38%

^[3]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

141

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

600

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

1,086

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

2,428

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

141

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

600

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

1,086

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

2,428

[1] Expenses have been restated to reflect anticipated fees.

[2] "Management Fees" reflects the management fee paid to the Manager by the Fund and the estimated gross management fee of the Subsidiary for its first full fiscal year.

[3] Estimated expenses for the first full fiscal year that these classes were offered. Classes C, Y and I were first available as of January 27, 2012.

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

[5] The Manager has voluntarily agreed to waive fees and/or reimburse the Fund for certain expenses in order to limit "Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement" (excluding any applicable dividend expense, taxes, interest and fees from borrowing, any subsidiary expenses, Acquired Fund Fees and Expenses, brokerage commissions, extraordinary expenses and certain other Fund expenses) to annual rates of 1.25% for Class A shares, 2.08% for Class C shares, 1.15% for Class Y shares and 1.00% for Class I shares as calculated on the daily net assets of the Fund. The Manager has also voluntarily agreed to waive fees and/or reimburse Fund expenses in an amount equal to the indirect management fees incurred through the Fund's investments in funds managed by the Manager or its affiliates. Each of these expense limitations may not be amended or withdrawn until 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.

[6] From 02/28/07.

XML

Annual Fund Operating Expenses ((Oppenheimer Global Multi Strategies Fund), (Global Multi Strategies Fund))	0 Months Ended
	Sep. 26, 2012
Class A
Operating Expenses:
Management Fees	0.91%	[1]
Distribution and/or Service (12b-1) Fees	0.25%	[2]
Other Expenses of the Fund	0.89%	[2]
Other Expenses of the Subsidiary	0.19%	[3]
Total Other Expenses	1.08%
Acquired Fund Fees and Expenses	0.14%
Total Annual Fund Operating Expenses	2.38%
Fee Waiver and/or Expense Reimbursement	(0.90%)	[4]
Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement	1.48%
Class C
Operating Expenses:
Management Fees	0.91%	[1],[5]
Distribution and/or Service (12b-1) Fees	1.00%	[2],[5]
Other Expenses of the Fund	0.89%	[2],[5]
Other Expenses of the Subsidiary	0.19%	[3],[5]
Total Other Expenses	1.08%	[5]
Acquired Fund Fees and Expenses	0.14%	[5]
Total Annual Fund Operating Expenses	3.13%	[5]
Fee Waiver and/or Expense Reimbursement	(0.82%)	[4],[5]
Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement	2.31%	[5]
Class I
Operating Expenses:
Management Fees	0.91%	[1],[5]
Distribution and/or Service (12b-1) Fees	none	[2]
Other Expenses of the Fund	0.72%	[2],[5]
Other Expenses of the Subsidiary	0.19%	[3],[5]
Total Other Expenses	0.91%	[5]
Acquired Fund Fees and Expenses	0.14%	[5]
Total Annual Fund Operating Expenses	1.96%	[5]
Fee Waiver and/or Expense Reimbursement	(0.73%)	[4],[5]
Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement	1.23%	[5]
Class Y
Operating Expenses:
Management Fees	0.91%	[1],[5]
Distribution and/or Service (12b-1) Fees	none	[2]
Other Expenses of the Fund	0.89%	[2],[5]
Other Expenses of the Subsidiary	0.19%	[3],[5]
Total Other Expenses	1.08%	[5]
Acquired Fund Fees and Expenses	0.14%	[5]
Total Annual Fund Operating Expenses	2.13%	[5]
Fee Waiver and/or Expense Reimbursement	(0.75%)	[4],[5]
Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement	1.38%	[5]

[1] "Management Fees" reflects the management fee paid to the Manager by the Fund and the estimated gross management fee of the Subsidiary for its first full fiscal year.

[2] Expenses have been restated to reflect anticipated fees.

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

[4] The Manager has voluntarily agreed to waive fees and/or reimburse the Fund for certain expenses in order to limit "Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement" (excluding any applicable dividend expense, taxes, interest and fees from borrowing, any subsidiary expenses, Acquired Fund Fees and Expenses, brokerage commissions, extraordinary expenses and certain other Fund expenses) to annual rates of 1.25% for Class A shares, 2.08% for Class C shares, 1.15% for Class Y shares and 1.00% for Class I shares as calculated on the daily net assets of the Fund. The Manager has also voluntarily agreed to waive fees and/or reimburse Fund expenses in an amount equal to the indirect management fees incurred through the Fund's investments in funds managed by the Manager or its affiliates. Each of these expense limitations may not be amended or withdrawn until 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] Estimated expenses for the first full fiscal year that these classes were offered. Classes C, Y and I were first available as of January 27, 2012.