485BPOS

Registration No. 033-28598

File No. 811-05724

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM N-1A

REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933	x
Pre-Effective Amendment No. ___	o
Post-Effective Amendment No. 45	x
and/or
REGISTRATION STATEMENT UNDER THE INVESTMENT COMPANY ACT OF 1940	x
Amendment No. 46	x

Oppenheimer Global Strategic Income 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.

OFI Global Asset Management, Inc. 

Two World Financial Center, 225 Liberty Street, 11^th Floor, 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 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 11^th day of February, 2013.

Oppenheimer Global Strategic Income Fund
By:	William F. Glavin, Jr.*
	William F. Glavin, Jr., President and 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
Sam Freedman*	Chairman of the Board of Trustees	February 11, 2013
Sam Freedman
William F. Glavin, Jr.*	President, Principal Executive	February 11, 2013
William F. Glavin, Jr.	Officer and Trustees
Brian W. Wixted*	Treasurer, Principal Financial &	February 11, 2013
Brian W. Wixted	Accounting Officer
Edward L. Cameron*	Trustee	February 11, 2013
Edward L. Cameron
Jon S. Fossel*	Trustee	February 11, 2013
Jon S. Fossel
Richard F. Grabish*	Trustee	February 11, 2013
Richard F. Grabish
Beverly L. Hamilton*	Trustee	February 11, 2013
Beverly L. Hamilton
Victoria J. Herget*	Trustee	February 11, 2013
Victoria J. Herget
Robert J. Malone*	Trustee	February 11, 2013
Robert J. Malone
F. William Marshall, Jr.*	Trustee	February 11, 2013
F. William Marshall, Jr.
Karen L. Stuckey*	Trustee	February 11, 2013
Karen L. Stuckey
James D. Vaughn*	Trustee	February 11, 2013
James D. Vaughn

*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

Expense Example, No Redemption (dei_DocumentInformationDocumentAxis, (Oppenheimer Global Strategic Income Fund), USD $)	0 Months Ended
	Jan. 28, 2013
Class A
Expense Example, No Redemption:
Expense Example, No Redemption, 1 Year	$ 567
Expense Example, No Redemption, 3 Years	772
Expense Example, No Redemption, 5 Years	994
Expense Example, No Redemption, 10 Years	1,632
Class B
Expense Example, No Redemption:
Expense Example, No Redemption, 1 Year	190
Expense Example, No Redemption, 3 Years	598
Expense Example, No Redemption, 5 Years	1,031
Expense Example, No Redemption, 10 Years	1,776
Class C
Expense Example, No Redemption:
Expense Example, No Redemption, 1 Year	173
Expense Example, No Redemption, 3 Years	548
Expense Example, No Redemption, 5 Years	947
Expense Example, No Redemption, 10 Years	2,065
Class I
Expense Example, No Redemption:
Expense Example, No Redemption, 1 Year	62	[1]
Expense Example, No Redemption, 3 Years	204	[1]
Expense Example, No Redemption, 5 Years	358	[1]
Expense Example, No Redemption, 10 Years	808	[1]
Class N
Expense Example, No Redemption:
Expense Example, No Redemption, 1 Year	137
Expense Example, No Redemption, 3 Years	438
Expense Example, No Redemption, 5 Years	761
Expense Example, No Redemption, 10 Years	1,676
Class Y
Expense Example, No Redemption:
Expense Example, No Redemption, 1 Year	77
Expense Example, No Redemption, 3 Years	251
Expense Example, No Redemption, 5 Years	441
Expense Example, No Redemption, 10 Years	$ 989

[1] Based on estimated expenses for Class I shares for the first fiscal year.

XML

(Oppenheimer Global Strategic Income 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 $50,000 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 17 of the prospectus and in the sections "How to Buy Shares" beginning on page 65 and "Appendix A" in the Fund's Statement of Additional Information.

Shareholder Fees (fees paid directly from your investment)

Shareholder Fees (Oppenheimer Global Strategic Income Fund)	Class A	Class B	Class C	Class N	Class Y	Class I
Maximum Sales Charge (Load) imposed on purchases (as % of offering price)	4.75%	none	none	none	none	none
Maximum Deferred Sales Charge (Load) (as % of the lower of original offering price or redemption proceeds)	none	5.00%	1.00%	1.00%	none	none

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

Annual Fund Operating Expenses (Oppenheimer Global Strategic Income Fund)		Class A	Class B	Class C	Class N	Class Y	Class I
Management Fees	[1]	0.51%	0.51%	0.51%	0.51%	0.51%	0.51%	[2]
Distribution and/or Service (12b-1) Fees		0.24%	1.00%	1.00%	0.50%	none	none	[2]
Acquired Fund Fees and Expenses		0.06%	0.06%	0.06%	0.06%	0.06%	0.06%	[2]
Other Expenses		0.18%	0.33%	0.17%	0.32%	0.23%	0.08%	[2]
Other Expenses of the Fund		0.18%	0.33%	0.17%	0.32%	0.23%	0.08%	[2]
Other Expenses of the Subsidiary	[3]	none	none	none	none	none	none	[2]
Total Annual Fund Operating Expenses		0.99%	1.90%	1.74%	1.39%	0.80%	0.65%	[2]
Fee Waiver and/or Expense Reimbursements	[4]	(0.05%)	(0.05%)	(0.05%)	(0.05%)	(0.05%)	(0.05%)	[2]
Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursements		0.94%	1.85%	1.69%	1.34%	0.75%	0.60%	[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 (Oppenheimer Global Strategic Income Fund) (USD $)		1 Year	3 Years	5 Years	10 Years
Class A		567	772	994	1,632
Class B		690	898	1,231	1,776
Class C		273	548	947	2,065
Class N		237	438	761	1,676
Class Y		77	251	441	989
Class I	[1]	62	204	358	808

If shares are not redeemed

Expense Example, No Redemption (Oppenheimer Global Strategic Income Fund) (USD $)		1 Year	3 Years	5 Years	10 Years
Class A		567	772	994	1,632
Class B		190	598	1,031	1,776
Class C		173	548	947	2,065
Class N		137	438	761	1,676
Class Y		77	251	441	989
Class I	[1]	62	204	358	808

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 74% of the average value of its portfolio.

Principal Investment Strategies. The Fund invests mainly in debt securities in three market sectors: Foreign governments and issuers, U.S. government securities, and lower-grade, high-yield securities of U.S. and foreign issuers (commonly referred to as "junk bonds"). A debt security is a security representing money borrowed by the issuer that must be repaid. The terms of a debt security specify the amount of principal, the interest rate or discount, and the time or times at which payments are due.

Under normal market conditions, the Fund invests in each of the three market sectors. However, it is not required to invest in all three sectors at all times, and the amount of its assets in each of the three sectors will vary. The Fund can invest up to 100% of its assets in any one sector at any time. Under normal market conditions, the Fund will invest a substantial portion of its assets in a number of different countries, including the U.S. The Fund is not required to allocate its investments in any set percentages in any particular countries. The Fund may also invest in securities outside of these three market sectors, as further described in the prospectus and the Fund's Statement of Additional Information. The Fund's foreign investments may include debt securities of issuers in both developed and emerging markets. The Fund has no limitations regarding the range of maturities of the debt securities it can buy or the market capitalization of the issuers of those securities.

The Fund's investments typically include foreign and U.S. government bonds and notes, collateralized mortgage obligations (CMOs), other mortgage-related securities, corporate debt obligations, including lower-grade, high-yield domestic and foreign corporate debt obligations, "structured" notes, participation interests in loans, investments in pooled investment entities (including those that invest in loans), asset-backed securities and "zero coupon" and "stripped" securities.

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 Sub-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 Sub-Adviser's credit analysis is consistent or comparable with the credit analysis process used by a nationally recognized statistical rating organization. Although the Fund normally invests a substantial portion of its assets in lower-grade, high-yield debt securities, it can buy investment-grade debt securities without limit.

The Fund may also use derivatives for investment purposes or hedging, including options, futures, forward contracts, swaps and "structured" notes. The Fund actively manages foreign currency exposure, both to reduce risk and to seek to enhance return. To do so, the Fund may invest in foreign exchange derivatives, including forwards and options that reference foreign currencies, including currencies of developing and emerging market countries.

The portfolio managers analyze the overall investment opportunities and risks among the three market sectors in which the Fund invests and seek to moderate the special risks of investing in lower-grade, high-yield debt instruments and foreign securities by building a broadly diversified portfolio. The Fund's diversification strategies are intended to help reduce share price volatility while seeking current income. The portfolio managers currently focus on securities offering high current income, securities whose market prices tend to move in different directions (to seek overall portfolio diversification), and relative values among the three market sectors in which the Fund invests. These factors may vary in particular cases and may change over time. The Fund may sell securities that the portfolio managers believe are no longer favorable with regard to these factors.

The Fund's holdings may at times differ significantly from the weightings of the indices comprising its reference index (the "Reference Index"). The Fund's Reference Index is a customized weighted index currently comprised of the following underlying broad-based security indices: 40% Citigroup Non-U.S. World Government Bond Index, 30% J.P. Morgan Domestic High Yield Index, and 30% Barclays Capital U.S. Aggregate Bond Index. The Fund is not managed to be invested in the same percentages as those indices comprising the Reference Index.

The Fund has established a Cayman Islands exempted 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 managers' use of different types of commodity-linked derivatives, fixed-income securities, Gold ETFs, and other investments. Since the Fund may invest a substantial portion of its assets in the Subsidiary, which may hold certain of the investments described in this prospectus, the Fund may be considered to be investing indirectly in those investments through its Subsidiary. Therefore, references in this prospectus to investments by the Fund also may be deemed to include the Fund's indirect investments through the Subsidiary.

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

Main Risks of Debt Securities. Debt securities may be subject to credit risk, interest rate risk, prepayment risk, extension risk and event 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. Event risk is the risk that an issuer could be subject to an event, such as a buyout or debt restructuring, that interferes with its ability to make timely interest and principal payments and cause the value of its debt securities to fall.

Special Risks of Lower-Grade Securities. Lower-grade securities, whether rated or unrated, may be subject to wider market fluctuation, greater credit risk and greater risk of loss of income and principal than investment-grade securities. The market for lower-grade securities may be less liquid and therefore they may be harder to sell at an acceptable price, especially during times of market volatility or decline.

Because the Fund can invest without limit in lower-grade securities, the Fund's credit risks are greater than those of funds that buy only investment-grade securities.

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.

Sector Allocation Risk. In allocating investments among its three principal market sectors, the Fund seeks to take advantage of the potential lack of performance correlation between those sectors. There is the risk that the evaluations regarding the sectors' relative performance may be incorrect and those sectors may all perform in a similar manner under certain market conditions.

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.

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.

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

Main Risks of Derivative Investments. Derivatives may be volatile and may involve significant risks. The underlying security or other instrument on which a derivative is based, or the derivative itself, may not perform as expected. Some derivatives have the potential for unlimited loss, regardless of the size of the Fund's initial investment. The Fund may also lose money on a derivative investment if the issuer or counterparty fails to pay the amount due. Certain derivative investments may be illiquid, making it difficult to close out an unfavorable position. Derivative transactions may require the payment of premiums and can increase portfolio turnover. As a result of these risks, the Fund could realize little or no income or lose money from its investment, or a hedge might be unsuccessful.

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

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

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

Who Is the Fund Designed For? The Fund is designed primarily for investors seeking total return from a fund that invests in a variety of domestic and foreign debt securities, including government and lower-grade debt securities. Those investors should be willing to assume the greater risks of short-term share price fluctuations and the special credit risks that are typical for a fund that invests mainly in lower-grade fixed-income securities and foreign securities. The Fund is not designed for investors needing an assured level of current income. The Fund is intended to be a long-term investment. The Fund is not a complete investment program. You should carefully consider your own investment goals and risk tolerance before investing in the Fund.

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

The Fund's Past Performance. The bar chart and table below provide some indication of the risks of investing in the Fund by showing changes in the Fund's performance (for Class A Shares) from year to year and by showing how the Fund's average annual returns for 1, 5 and 10 years compare with those of a broad measure of market performance and those of the Reference Index, which has characteristics of those markets in which the Fund can invest. 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/GlobalStrategicIncomeFund

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 11.79% (2nd Qtr 09) and the lowest return was -11.16% (4th Qtr 08). For the period from January 1, 2012 to December 31, 2012, the cumulative return before sales charges and taxes was 13.49%.

Average Annual Total Returns for the periods ended December 31, 2012

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 Class I shares will be provided after those shares have one full calendar year of performance.

Average Annual Total Returns (Oppenheimer Global Strategic Income Fund)	Inception Date	1 Year	5 Years	10 Years
Class A	Oct. 16, 1989	8.10%	5.21%	7.55%
Class A Return After Taxes on Distributions		5.94%	2.97%	5.24%
Class A Return After Taxes on Distributions and Sale of Fund Shares		5.19%	3.07%	5.11%
Class B	Nov. 30, 1992	7.46%	4.96%	7.58%
Class C	May 26, 1995	11.67%	5.44%	7.27%
Class N	Mar. 01, 2001	12.05%	5.80%	7.62%
Class Y	Jan. 26, 1998	13.72%	6.43%	8.27%
Barclays Capital U.S. Aggregate Bond Index		4.22%	5.95%	5.18%
Citigroup World Government Bond Index		1.65%	5.27%	6.04%
Citigroup Non-U.S. World Government Bond Index		1.51%	5.24%	6.38%
J.P. Morgan Domestic High Yield Index		15.39%	10.46%	10.50%
Reference Index		6.49%	7.02%	7.26%

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

[2] Estimated expenses for the first full fiscal year that Class I shares are offered.

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

[4] The Manager has voluntarily agreed to waive fees and/or reimburse Fund expenses in an amount equal to the indirect management fees incurred through the Fund's investment in underlying funds managed by the Manager or its affiliates. This expense limitation may not be amended or withdrawn until one year after 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] Based on estimated expenses for Class I shares for the first fiscal year.

[1] Based on estimated expenses for Class I shares for the first fiscal year.

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Expense Example (dei_DocumentInformationDocumentAxis, (Oppenheimer Global Strategic Income Fund), USD $)	0 Months Ended
	Jan. 28, 2013
Class A
Expense Example:
Expense Example, with Redemption, 1 Year	$ 567
Expense Example, with Redemption, 3 Years	772
Expense Example, with Redemption, 5 Years	994
Expense Example, with Redemption, 10 Years	1,632
Class B
Expense Example:
Expense Example, with Redemption, 1 Year	690
Expense Example, with Redemption, 3 Years	898
Expense Example, with Redemption, 5 Years	1,231
Expense Example, with Redemption, 10 Years	1,776
Class C
Expense Example:
Expense Example, with Redemption, 1 Year	273
Expense Example, with Redemption, 3 Years	548
Expense Example, with Redemption, 5 Years	947
Expense Example, with Redemption, 10 Years	2,065
Class I
Expense Example:
Expense Example, with Redemption, 1 Year	62	[1]
Expense Example, with Redemption, 3 Years	204	[1]
Expense Example, with Redemption, 5 Years	358	[1]
Expense Example, with Redemption, 10 Years	808	[1]
Class N
Expense Example:
Expense Example, with Redemption, 1 Year	237
Expense Example, with Redemption, 3 Years	438
Expense Example, with Redemption, 5 Years	761
Expense Example, with Redemption, 10 Years	1,676
Class Y
Expense Example:
Expense Example, with Redemption, 1 Year	77
Expense Example, with Redemption, 3 Years	251
Expense Example, with Redemption, 5 Years	441
Expense Example, with Redemption, 10 Years	$ 989

[1] Based on estimated expenses for Class I shares for the first fiscal year.

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Shareholder Fees (dei_DocumentInformationDocumentAxis, (Oppenheimer Global Strategic Income Fund))	0 Months Ended
	Jan. 28, 2013
Class A
Shareholder Fees:
Maximum Sales Charge (Load) imposed on purchases (as % of offering price)	4.75%
Maximum Deferred Sales Charge (Load) (as % of the lower of original offering price or redemption proceeds)	none
Class B
Shareholder Fees:
Maximum Sales Charge (Load) imposed on purchases (as % of offering price)	none
Maximum Deferred Sales Charge (Load) (as % of the lower of original offering price or redemption proceeds)	5.00%
Class C
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 N
Shareholder Fees:
Maximum Sales Charge (Load) imposed on purchases (as % of offering price)	none
Maximum Deferred Sales Charge (Load) (as % of the lower of original offering price or redemption proceeds)	1.00%
Class Y
Shareholder Fees:
Maximum Sales Charge (Load) imposed on purchases (as % of offering price)	none
Maximum Deferred Sales Charge (Load) (as % of the lower of original offering price or redemption proceeds)	none

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(Oppenheimer Global Strategic Income 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 $50,000 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 17 of the prospectus and in the sections "How to Buy Shares" beginning on page 65 and "Appendix A" in the Fund's Statement of Additional Information.

Shareholder Fees (fees paid directly from your investment)

Shareholder Fees (Oppenheimer Global Strategic Income Fund)	Class A	Class B	Class C	Class N	Class Y	Class I
Maximum Sales Charge (Load) imposed on purchases (as % of offering price)	4.75%	none	none	none	none	none
Maximum Deferred Sales Charge (Load) (as % of the lower of original offering price or redemption proceeds)	none	5.00%	1.00%	1.00%	none	none

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

Annual Fund Operating Expenses (Oppenheimer Global Strategic Income Fund)		Class A	Class B	Class C	Class N	Class Y	Class I
Management Fees	[1]	0.51%	0.51%	0.51%	0.51%	0.51%	0.51%	[2]
Distribution and/or Service (12b-1) Fees		0.24%	1.00%	1.00%	0.50%	none	none	[2]
Acquired Fund Fees and Expenses		0.06%	0.06%	0.06%	0.06%	0.06%	0.06%	[2]
Other Expenses		0.18%	0.33%	0.17%	0.32%	0.23%	0.08%	[2]
Other Expenses of the Fund		0.18%	0.33%	0.17%	0.32%	0.23%	0.08%	[2]
Other Expenses of the Subsidiary	[3]	none	none	none	none	none	none	[2]
Total Annual Fund Operating Expenses		0.99%	1.90%	1.74%	1.39%	0.80%	0.65%	[2]
Fee Waiver and/or Expense Reimbursements	[4]	(0.05%)	(0.05%)	(0.05%)	(0.05%)	(0.05%)	(0.05%)	[2]
Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursements		0.94%	1.85%	1.69%	1.34%	0.75%	0.60%	[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 (Oppenheimer Global Strategic Income Fund) (USD $)		1 Year	3 Years	5 Years	10 Years
Class A		567	772	994	1,632
Class B		690	898	1,231	1,776
Class C		273	548	947	2,065
Class N		237	438	761	1,676
Class Y		77	251	441	989
Class I	[1]	62	204	358	808

If shares are not redeemed

Expense Example, No Redemption (Oppenheimer Global Strategic Income Fund) (USD $)		1 Year	3 Years	5 Years	10 Years
Class A		567	772	994	1,632
Class B		190	598	1,031	1,776
Class C		173	548	947	2,065
Class N		137	438	761	1,676
Class Y		77	251	441	989
Class I	[1]	62	204	358	808

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 74% of the average value of its portfolio.

Principal Investment Strategies. The Fund invests mainly in debt securities in three market sectors: Foreign governments and issuers, U.S. government securities, and lower-grade, high-yield securities of U.S. and foreign issuers (commonly referred to as "junk bonds"). A debt security is a security representing money borrowed by the issuer that must be repaid. The terms of a debt security specify the amount of principal, the interest rate or discount, and the time or times at which payments are due.

Under normal market conditions, the Fund invests in each of the three market sectors. However, it is not required to invest in all three sectors at all times, and the amount of its assets in each of the three sectors will vary. The Fund can invest up to 100% of its assets in any one sector at any time. Under normal market conditions, the Fund will invest a substantial portion of its assets in a number of different countries, including the U.S. The Fund is not required to allocate its investments in any set percentages in any particular countries. The Fund may also invest in securities outside of these three market sectors, as further described in the prospectus and the Fund's Statement of Additional Information. The Fund's foreign investments may include debt securities of issuers in both developed and emerging markets. The Fund has no limitations regarding the range of maturities of the debt securities it can buy or the market capitalization of the issuers of those securities.

The Fund's investments typically include foreign and U.S. government bonds and notes, collateralized mortgage obligations (CMOs), other mortgage-related securities, corporate debt obligations, including lower-grade, high-yield domestic and foreign corporate debt obligations, "structured" notes, participation interests in loans, investments in pooled investment entities (including those that invest in loans), asset-backed securities and "zero coupon" and "stripped" securities.

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 Sub-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 Sub-Adviser's credit analysis is consistent or comparable with the credit analysis process used by a nationally recognized statistical rating organization. Although the Fund normally invests a substantial portion of its assets in lower-grade, high-yield debt securities, it can buy investment-grade debt securities without limit.

The Fund may also use derivatives for investment purposes or hedging, including options, futures, forward contracts, swaps and "structured" notes. The Fund actively manages foreign currency exposure, both to reduce risk and to seek to enhance return. To do so, the Fund may invest in foreign exchange derivatives, including forwards and options that reference foreign currencies, including currencies of developing and emerging market countries.

The portfolio managers analyze the overall investment opportunities and risks among the three market sectors in which the Fund invests and seek to moderate the special risks of investing in lower-grade, high-yield debt instruments and foreign securities by building a broadly diversified portfolio. The Fund's diversification strategies are intended to help reduce share price volatility while seeking current income. The portfolio managers currently focus on securities offering high current income, securities whose market prices tend to move in different directions (to seek overall portfolio diversification), and relative values among the three market sectors in which the Fund invests. These factors may vary in particular cases and may change over time. The Fund may sell securities that the portfolio managers believe are no longer favorable with regard to these factors.

The Fund's holdings may at times differ significantly from the weightings of the indices comprising its reference index (the "Reference Index"). The Fund's Reference Index is a customized weighted index currently comprised of the following underlying broad-based security indices: 40% Citigroup Non-U.S. World Government Bond Index, 30% J.P. Morgan Domestic High Yield Index, and 30% Barclays Capital U.S. Aggregate Bond Index. The Fund is not managed to be invested in the same percentages as those indices comprising the Reference Index.

The Fund has established a Cayman Islands exempted 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 managers' use of different types of commodity-linked derivatives, fixed-income securities, Gold ETFs, and other investments. Since the Fund may invest a substantial portion of its assets in the Subsidiary, which may hold certain of the investments described in this prospectus, the Fund may be considered to be investing indirectly in those investments through its Subsidiary. Therefore, references in this prospectus to investments by the Fund also may be deemed to include the Fund's indirect investments through the Subsidiary.

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

Main Risks of Debt Securities. Debt securities may be subject to credit risk, interest rate risk, prepayment risk, extension risk and event 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. Event risk is the risk that an issuer could be subject to an event, such as a buyout or debt restructuring, that interferes with its ability to make timely interest and principal payments and cause the value of its debt securities to fall.

Special Risks of Lower-Grade Securities. Lower-grade securities, whether rated or unrated, may be subject to wider market fluctuation, greater credit risk and greater risk of loss of income and principal than investment-grade securities. The market for lower-grade securities may be less liquid and therefore they may be harder to sell at an acceptable price, especially during times of market volatility or decline.

Because the Fund can invest without limit in lower-grade securities, the Fund's credit risks are greater than those of funds that buy only investment-grade securities.

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.

Sector Allocation Risk. In allocating investments among its three principal market sectors, the Fund seeks to take advantage of the potential lack of performance correlation between those sectors. There is the risk that the evaluations regarding the sectors' relative performance may be incorrect and those sectors may all perform in a similar manner under certain market conditions.

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.

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.

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

Main Risks of Derivative Investments. Derivatives may be volatile and may involve significant risks. The underlying security or other instrument on which a derivative is based, or the derivative itself, may not perform as expected. Some derivatives have the potential for unlimited loss, regardless of the size of the Fund's initial investment. The Fund may also lose money on a derivative investment if the issuer or counterparty fails to pay the amount due. Certain derivative investments may be illiquid, making it difficult to close out an unfavorable position. Derivative transactions may require the payment of premiums and can increase portfolio turnover. As a result of these risks, the Fund could realize little or no income or lose money from its investment, or a hedge might be unsuccessful.

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

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

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

Who Is the Fund Designed For? The Fund is designed primarily for investors seeking total return from a fund that invests in a variety of domestic and foreign debt securities, including government and lower-grade debt securities. Those investors should be willing to assume the greater risks of short-term share price fluctuations and the special credit risks that are typical for a fund that invests mainly in lower-grade fixed-income securities and foreign securities. The Fund is not designed for investors needing an assured level of current income. The Fund is intended to be a long-term investment. The Fund is not a complete investment program. You should carefully consider your own investment goals and risk tolerance before investing in the Fund.

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

The Fund's Past Performance. The bar chart and table below provide some indication of the risks of investing in the Fund by showing changes in the Fund's performance (for Class A Shares) from year to year and by showing how the Fund's average annual returns for 1, 5 and 10 years compare with those of a broad measure of market performance and those of the Reference Index, which has characteristics of those markets in which the Fund can invest. 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/GlobalStrategicIncomeFund

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 11.79% (2nd Qtr 09) and the lowest return was -11.16% (4th Qtr 08). For the period from January 1, 2012 to December 31, 2012, the cumulative return before sales charges and taxes was 13.49%.

Average Annual Total Returns for the periods ended December 31, 2012

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 Class I shares will be provided after those shares have one full calendar year of performance.

Average Annual Total Returns (Oppenheimer Global Strategic Income Fund)	Inception Date	1 Year	5 Years	10 Years
Class A	Oct. 16, 1989	8.10%	5.21%	7.55%
Class A Return After Taxes on Distributions		5.94%	2.97%	5.24%
Class A Return After Taxes on Distributions and Sale of Fund Shares		5.19%	3.07%	5.11%
Class B	Nov. 30, 1992	7.46%	4.96%	7.58%
Class C	May 26, 1995	11.67%	5.44%	7.27%
Class N	Mar. 01, 2001	12.05%	5.80%	7.62%
Class Y	Jan. 26, 1998	13.72%	6.43%	8.27%
Barclays Capital U.S. Aggregate Bond Index		4.22%	5.95%	5.18%
Citigroup World Government Bond Index		1.65%	5.27%	6.04%
Citigroup Non-U.S. World Government Bond Index		1.51%	5.24%	6.38%
J.P. Morgan Domestic High Yield Index		15.39%	10.46%	10.50%
Reference Index		6.49%	7.02%	7.26%

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

[2] Estimated expenses for the first full fiscal year that Class I shares are offered.

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

[4] The Manager has voluntarily agreed to waive fees and/or reimburse Fund expenses in an amount equal to the indirect management fees incurred through the Fund's investment in underlying funds managed by the Manager or its affiliates. This expense limitation may not be amended or withdrawn until one year after 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] Based on estimated expenses for Class I shares for the first fiscal year.

[1] Based on estimated expenses for Class I shares for the first fiscal year.

XML

Annual Total Returns (dei_DocumentInformationDocumentAxis, (Oppenheimer Global Strategic Income Fund), Class A)	0 Months Ended
	Jan. 28, 2013
(Oppenheimer Global Strategic Income Fund) | Class A
Bar Chart Table:
Annual Return 2003	19.60%
Annual Return 2004	9.62%
Annual Return 2005	4.16%
Annual Return 2006	7.68%
Annual Return 2007	9.22%
Annual Return 2008	(16.50%)
Annual Return 2009	22.09%
Annual Return 2010	15.96%
Annual Return 2011	0.89%
Annual Return 2012	13.49%

XML

Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Document Type

dei_DocumentType

485BPOS

Document Period End Date

dei_DocumentPeriodEndDate

Sep. 30, 2012

Registrant Name

dei_EntityRegistrantName

OPPENHEIMER GLOBAL STRATEGIC INCOME FUND

Central Index Key

dei_EntityCentralIndexKey

0000850134

Amendment Flag

dei_AmendmentFlag

false

Document Creation Date

dei_DocumentCreationDate

Jan. 25, 2013

Document Effective Date

dei_DocumentEffectiveDate

Jan. 28, 2013

Prospectus Date

rr_ProspectusDate

Jan. 28, 2013

(Oppenheimer Global Strategic Income 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 $50,000 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 17 of the prospectus and in the sections "How to Buy Shares" beginning on page 65 and "Appendix A" in the Fund's Statement of Additional Information.

Shareholder Fees Caption [Text]

rr_ShareholderFeesCaption

Shareholder Fees (fees paid directly from your investment)

Operating Expenses Caption [Text]

rr_OperatingExpensesCaption

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

Portfolio Turnover [Text Block]

rr_PortfolioTurnoverTextBlock

Portfolio Turnover. The Fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in the annual fund operating expenses or in the Example, affect the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 74% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

74.00%

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 $50,000 in certain funds in the Oppenheimer family of funds.

Expense Breakpoint, Minimum Investment Required [Amount]

rr_ExpenseBreakpointMinimumInvestmentRequiredAmount

50,000

Expense Example Narrative [Text Block]

rr_ExpenseExampleNarrativeTextBlock

Example. The following Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in a class of shares of the Fund for the time periods indicated. The Example also assumes that your investment has a 5% return each year and that the Fund's operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions your expenses would be as follows:

Expense Example by, Year, Caption [Text]

rr_ExpenseExampleByYearCaption

If shares are redeemed

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

rr_ExpenseExampleNoRedemptionByYearCaption

If shares are not redeemed

Strategy Narrative [Text Block]

rr_StrategyNarrativeTextBlock

Principal Investment Strategies. The Fund invests mainly in debt securities in three market sectors: Foreign governments and issuers, U.S. government securities, and lower-grade, high-yield securities of U.S. and foreign issuers (commonly referred to as "junk bonds"). A debt security is a security representing money borrowed by the issuer that must be repaid. The terms of a debt security specify the amount of principal, the interest rate or discount, and the time or times at which payments are due.

Under normal market conditions, the Fund invests in each of the three market sectors. However, it is not required to invest in all three sectors at all times, and the amount of its assets in each of the three sectors will vary. The Fund can invest up to 100% of its assets in any one sector at any time. Under normal market conditions, the Fund will invest a substantial portion of its assets in a number of different countries, including the U.S. The Fund is not required to allocate its investments in any set percentages in any particular countries. The Fund may also invest in securities outside of these three market sectors, as further described in the prospectus and the Fund's Statement of Additional Information. The Fund's foreign investments may include debt securities of issuers in both developed and emerging markets. The Fund has no limitations regarding the range of maturities of the debt securities it can buy or the market capitalization of the issuers of those securities.

The Fund's investments typically include foreign and U.S. government bonds and notes, collateralized mortgage obligations (CMOs), other mortgage-related securities, corporate debt obligations, including lower-grade, high-yield domestic and foreign corporate debt obligations, "structured" notes, participation interests in loans, investments in pooled investment entities (including those that invest in loans), asset-backed securities and "zero coupon" and "stripped" securities.

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 Sub-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 Sub-Adviser's credit analysis is consistent or comparable with the credit analysis process used by a nationally recognized statistical rating organization. Although the Fund normally invests a substantial portion of its assets in lower-grade, high-yield debt securities, it can buy investment-grade debt securities without limit.

The Fund may also use derivatives for investment purposes or hedging, including options, futures, forward contracts, swaps and "structured" notes. The Fund actively manages foreign currency exposure, both to reduce risk and to seek to enhance return. To do so, the Fund may invest in foreign exchange derivatives, including forwards and options that reference foreign currencies, including currencies of developing and emerging market countries.

The portfolio managers analyze the overall investment opportunities and risks among the three market sectors in which the Fund invests and seek to moderate the special risks of investing in lower-grade, high-yield debt instruments and foreign securities by building a broadly diversified portfolio. The Fund's diversification strategies are intended to help reduce share price volatility while seeking current income. The portfolio managers currently focus on securities offering high current income, securities whose market prices tend to move in different directions (to seek overall portfolio diversification), and relative values among the three market sectors in which the Fund invests. These factors may vary in particular cases and may change over time. The Fund may sell securities that the portfolio managers believe are no longer favorable with regard to these factors.

The Fund's holdings may at times differ significantly from the weightings of the indices comprising its reference index (the "Reference Index"). The Fund's Reference Index is a customized weighted index currently comprised of the following underlying broad-based security indices: 40% Citigroup Non-U.S. World Government Bond Index, 30% J.P. Morgan Domestic High Yield Index, and 30% Barclays Capital U.S. Aggregate Bond Index. The Fund is not managed to be invested in the same percentages as those indices comprising the Reference Index.

The Fund has established a Cayman Islands exempted 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 managers' use of different types of commodity-linked derivatives, fixed-income securities, Gold ETFs, and other investments. Since the Fund may invest a substantial portion of its assets in the Subsidiary, which may hold certain of the investments described in this prospectus, the Fund may be considered to be investing indirectly in those investments through its Subsidiary. Therefore, references in this prospectus to investments by the Fund also may be deemed to include the Fund's indirect investments through the Subsidiary.

Risk Narrative [Text Block]

rr_RiskNarrativeTextBlock

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

Main Risks of Debt Securities. Debt securities may be subject to credit risk, interest rate risk, prepayment risk, extension risk and event 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. Event risk is the risk that an issuer could be subject to an event, such as a buyout or debt restructuring, that interferes with its ability to make timely interest and principal payments and cause the value of its debt securities to fall.

Special Risks of Lower-Grade Securities. Lower-grade securities, whether rated or unrated, may be subject to wider market fluctuation, greater credit risk and greater risk of loss of income and principal than investment-grade securities. The market for lower-grade securities may be less liquid and therefore they may be harder to sell at an acceptable price, especially during times of market volatility or decline.

Because the Fund can invest without limit in lower-grade securities, the Fund's credit risks are greater than those of funds that buy only investment-grade securities.

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.

Sector Allocation Risk. In allocating investments among its three principal market sectors, the Fund seeks to take advantage of the potential lack of performance correlation between those sectors. There is the risk that the evaluations regarding the sectors' relative performance may be incorrect and those sectors may all perform in a similar manner under certain market conditions.

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.

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.

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

Main Risks of Derivative Investments. Derivatives may be volatile and may involve significant risks. The underlying security or other instrument on which a derivative is based, or the derivative itself, may not perform as expected. Some derivatives have the potential for unlimited loss, regardless of the size of the Fund's initial investment. The Fund may also lose money on a derivative investment if the issuer or counterparty fails to pay the amount due. Certain derivative investments may be illiquid, making it difficult to close out an unfavorable position. Derivative transactions may require the payment of premiums and can increase portfolio turnover. As a result of these risks, the Fund could realize little or no income or lose money from its investment, or a hedge might be unsuccessful.

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

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

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

Who Is the Fund Designed For? The Fund is designed primarily for investors seeking total return from a fund that invests in a variety of domestic and foreign debt securities, including government and lower-grade debt securities. Those investors should be willing to assume the greater risks of short-term share price fluctuations and the special credit risks that are typical for a fund that invests mainly in lower-grade fixed-income securities and foreign securities. The Fund is not designed for investors needing an assured level of current income. The Fund is intended to be a long-term investment. The Fund is not a complete investment program. You should carefully consider your own investment goals and risk tolerance before investing in the Fund.

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

Risk Lose Money [Text]

rr_RiskLoseMoney

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

Risk Not Insured Depository Institution [Text]

rr_RiskNotInsuredDepositoryInstitution

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

Performance Narrative [Text Block]

rr_PerformanceNarrativeTextBlock

The Fund's Past Performance. The bar chart and table below provide some indication of the risks of investing in the Fund by showing changes in the Fund's performance (for Class A Shares) from year to year and by showing how the Fund's average annual returns for 1, 5 and 10 years compare with those of a broad measure of market performance and those of the Reference Index, which has characteristics of those markets in which the Fund can invest. 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/GlobalStrategicIncomeFund

Performance Availability Website Address [Text]

rr_PerformanceAvailabilityWebSiteAddress

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

Performance Past Does Not Indicate Future [Text]

rr_PerformancePastDoesNotIndicateFuture

The Fund's past investment performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future.

Bar Chart Closing [Text Block]

rr_BarChartClosingTextBlock

Sales charges and taxes are not included and the returns would be lower if they were. During the period shown, the highest return for a calendar quarter was 11.79% (2nd Qtr 09) and the lowest return was -11.16% (4th Qtr 08). For the period from January 1, 2012 to December 31, 2012, the cumulative return before sales charges and taxes was 13.49%.

Performance Table Heading

rr_PerformanceTableHeading

Average Annual Total Returns for the periods ended December 31, 2012

Performance Table Uses Highest Federal Rate

rr_PerformanceTableUsesHighestFederalRate

After-tax returns are calculated using the highest individual federal marginal income tax rates and do not reflect the impact of state or local taxes.

Performance Table Not Relevant to Tax Deferred

rr_PerformanceTableNotRelevantToTaxDeferred

Your actual after-tax returns, depending on your individual tax situation, may differ from those shown and after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts.

Performance Table One Class of after Tax Shown [Text]

rr_PerformanceTableOneClassOfAfterTaxShown

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

Performance Table Narrative

rr_PerformanceTableNarrativeTextBlock

The following table shows the average annual total returns for each class of the Fund's shares. After-tax returns are calculated using the highest individual federal marginal income tax rates and do not reflect the impact of state or local taxes. Your actual after-tax returns, depending on your individual tax situation, may differ from those shown and after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. After-tax returns are shown for only one class and after-tax returns for other classes will vary.

Performance information for Class I shares will be provided after those shares have one full calendar year of performance.

(Oppenheimer Global Strategic Income Fund) | Reference Index

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

6.49%

5 Years

rr_AverageAnnualReturnYear05

7.02%

10 Years

rr_AverageAnnualReturnYear10

7.26%

(Oppenheimer Global Strategic Income Fund) | J.P. Morgan Domestic High Yield Index

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

15.39%

5 Years

rr_AverageAnnualReturnYear05

10.46%

10 Years

rr_AverageAnnualReturnYear10

10.50%

(Oppenheimer Global Strategic Income Fund) | Citigroup Non-U.S. World Government Bond Index

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

1.51%

5 Years

rr_AverageAnnualReturnYear05

5.24%

10 Years

rr_AverageAnnualReturnYear10

6.38%

(Oppenheimer Global Strategic Income Fund) | Citigroup World Government Bond Index

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

1.65%

5 Years

rr_AverageAnnualReturnYear05

5.27%

10 Years

rr_AverageAnnualReturnYear10

6.04%

(Oppenheimer Global Strategic Income Fund) | Barclays Capital U.S. Aggregate Bond Index

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

4.22%

5 Years

rr_AverageAnnualReturnYear05

5.95%

10 Years

rr_AverageAnnualReturnYear10

5.18%

(Oppenheimer Global Strategic Income Fund) | Class A

Risk/Return:

rr_RiskReturnAbstract

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

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

4.75%

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

rr_MaximumDeferredSalesChargeOverOther

none

Management Fees

rr_ManagementFeesOverAssets

0.51%

^[1]

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

rr_DistributionAndService12b1FeesOverAssets

0.24%

Other Expenses of the Fund

rr_Component1OtherExpensesOverAssets

0.18%

Other Expenses of the Subsidiary

rr_Component2OtherExpensesOverAssets

none

^[3]

Other Expenses

rr_OtherExpensesOverAssets

0.18%

Acquired Fund Fees and Expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.06%

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

0.99%

Fee Waiver and/or Expense Reimbursements

rr_FeeWaiverOrReimbursementOverAssets

(0.05%)

^[4]

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

rr_NetExpensesOverAssets

0.94%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

567

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

772

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

994

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,632

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

567

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

772

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

994

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

1,632

Annual Return 2003

rr_AnnualReturn2003

19.60%

Annual Return 2004

rr_AnnualReturn2004

9.62%

Annual Return 2005

rr_AnnualReturn2005

4.16%

Annual Return 2006

rr_AnnualReturn2006

7.68%

Annual Return 2007

rr_AnnualReturn2007

9.22%

Annual Return 2008

rr_AnnualReturn2008

(16.50%)

Annual Return 2009

rr_AnnualReturn2009

22.09%

Annual Return 2010

rr_AnnualReturn2010

15.96%

Annual Return 2011

rr_AnnualReturn2011

0.89%

Annual Return 2012

rr_AnnualReturn2012

13.49%

Year to Date Return, Label

rr_YearToDateReturnLabel

For the period from January 1, 2012 to December 31, 2012, the cumulative return before sales charges and taxes was 13.49%.

Bar Chart, Year to Date Return, Date

rr_BarChartYearToDateReturnDate

Dec. 31, 2012

Bar Chart, Year to Date Return

rr_BarChartYearToDateReturn

13.49%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

highest return for a calendar quarter was 11.79% (2nd Qtr 09)

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

11.79%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

lowest return was -11.16% (4th Qtr 08)

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(11.16%)

1 Year

rr_AverageAnnualReturnYear01

8.10%

5 Years

rr_AverageAnnualReturnYear05

5.21%

10 Years

rr_AverageAnnualReturnYear10

7.55%

Inception Date

rr_AverageAnnualReturnInceptionDate

Oct. 16, 1989

(Oppenheimer Global Strategic Income Fund) | Class A | Return After Taxes on Distributions

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

5.94%

5 Years

rr_AverageAnnualReturnYear05

2.97%

10 Years

rr_AverageAnnualReturnYear10

5.24%

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

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

5.19%

5 Years

rr_AverageAnnualReturnYear05

3.07%

10 Years

rr_AverageAnnualReturnYear10

5.11%

(Oppenheimer Global Strategic Income Fund) | Class B

Risk/Return:

rr_RiskReturnAbstract

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

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

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

rr_MaximumDeferredSalesChargeOverOther

5.00%

Management Fees

rr_ManagementFeesOverAssets

0.51%

^[1]

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

rr_DistributionAndService12b1FeesOverAssets

1.00%

Other Expenses of the Fund

rr_Component1OtherExpensesOverAssets

0.33%

Other Expenses of the Subsidiary

rr_Component2OtherExpensesOverAssets

none

^[3]

Other Expenses

rr_OtherExpensesOverAssets

0.33%

Acquired Fund Fees and Expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.06%

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

1.90%

Fee Waiver and/or Expense Reimbursements

rr_FeeWaiverOrReimbursementOverAssets

(0.05%)

^[4]

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

rr_NetExpensesOverAssets

1.85%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

690

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

898

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

1,231

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,776

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

190

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

598

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

1,031

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

1,776

1 Year

rr_AverageAnnualReturnYear01

7.46%

5 Years

rr_AverageAnnualReturnYear05

4.96%

10 Years

rr_AverageAnnualReturnYear10

7.58%

Inception Date

rr_AverageAnnualReturnInceptionDate

Nov. 30, 1992

(Oppenheimer Global Strategic Income 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

0.51%

^[1]

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

rr_DistributionAndService12b1FeesOverAssets

1.00%

Other Expenses of the Fund

rr_Component1OtherExpensesOverAssets

0.17%

Other Expenses of the Subsidiary

rr_Component2OtherExpensesOverAssets

none

^[3]

Other Expenses

rr_OtherExpensesOverAssets

0.17%

Acquired Fund Fees and Expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.06%

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

1.74%

Fee Waiver and/or Expense Reimbursements

rr_FeeWaiverOrReimbursementOverAssets

(0.05%)

^[4]

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

rr_NetExpensesOverAssets

1.69%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

273

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

548

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

947

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

2,065

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

173

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

548

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

947

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

2,065

1 Year

rr_AverageAnnualReturnYear01

11.67%

5 Years

rr_AverageAnnualReturnYear05

5.44%

10 Years

rr_AverageAnnualReturnYear10

7.27%

Inception Date

rr_AverageAnnualReturnInceptionDate

May 26, 1995

(Oppenheimer Global Strategic Income 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

0.51%

^[1],[2]

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

rr_DistributionAndService12b1FeesOverAssets

none

^[2]

Other Expenses of the Fund

rr_Component1OtherExpensesOverAssets

0.08%

^[2]

Other Expenses of the Subsidiary

rr_Component2OtherExpensesOverAssets

none

^[2],[3]

Other Expenses

rr_OtherExpensesOverAssets

0.08%

^[2]

Acquired Fund Fees and Expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.06%

^[2]

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

0.65%

^[2]

Fee Waiver and/or Expense Reimbursements

rr_FeeWaiverOrReimbursementOverAssets

(0.05%)

^[2],[4]

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

rr_NetExpensesOverAssets

0.60%

^[2]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

62

^[5]

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

204

^[5]

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

358

^[5]

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

808

^[5]

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

62

^[5]

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

204

^[5]

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

358

^[5]

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

808

^[5]

(Oppenheimer Global Strategic Income Fund) | Class N

Risk/Return:

rr_RiskReturnAbstract

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

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

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

rr_MaximumDeferredSalesChargeOverOther

1.00%

Management Fees

rr_ManagementFeesOverAssets

0.51%

^[1]

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

rr_DistributionAndService12b1FeesOverAssets

0.50%

Other Expenses of the Fund

rr_Component1OtherExpensesOverAssets

0.32%

Other Expenses of the Subsidiary

rr_Component2OtherExpensesOverAssets

none

^[3]

Other Expenses

rr_OtherExpensesOverAssets

0.32%

Acquired Fund Fees and Expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.06%

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

1.39%

Fee Waiver and/or Expense Reimbursements

rr_FeeWaiverOrReimbursementOverAssets

(0.05%)

^[4]

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

rr_NetExpensesOverAssets

1.34%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

237

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

438

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

761

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,676

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

137

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

438

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

761

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

1,676

1 Year

rr_AverageAnnualReturnYear01

12.05%

5 Years

rr_AverageAnnualReturnYear05

5.80%

10 Years

rr_AverageAnnualReturnYear10

7.62%

Inception Date

rr_AverageAnnualReturnInceptionDate

Mar. 01, 2001

(Oppenheimer Global Strategic Income 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

0.51%

^[1]

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

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses of the Fund

rr_Component1OtherExpensesOverAssets

0.23%

Other Expenses of the Subsidiary

rr_Component2OtherExpensesOverAssets

none

^[3]

Other Expenses

rr_OtherExpensesOverAssets

0.23%

Acquired Fund Fees and Expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.06%

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

0.80%

Fee Waiver and/or Expense Reimbursements

rr_FeeWaiverOrReimbursementOverAssets

(0.05%)

^[4]

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

rr_NetExpensesOverAssets

0.75%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

77

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

251

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

441

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

989

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

77

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

251

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

441

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

989

1 Year

rr_AverageAnnualReturnYear01

13.72%

5 Years

rr_AverageAnnualReturnYear05

6.43%

10 Years

rr_AverageAnnualReturnYear10

8.27%

Inception Date

rr_AverageAnnualReturnInceptionDate

Jan. 26, 1998

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

[2] Estimated expenses for the first full fiscal year that Class I shares are offered.

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

[4] The Manager has voluntarily agreed to waive fees and/or reimburse Fund expenses in an amount equal to the indirect management fees incurred through the Fund's investment in underlying funds managed by the Manager or its affiliates. This expense limitation may not be amended or withdrawn until one year after 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] Based on estimated expenses for Class I shares for the first fiscal year.

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Average Annual Total Returns (dei_DocumentInformationDocumentAxis, (Oppenheimer Global Strategic Income Fund))	0 Months Ended
	Jan. 28, 2013
Reference Index
Average Annual Return:
1 Year	6.49%
5 Years	7.02%
10 Years	7.26%
J.P. Morgan Domestic High Yield Index
Average Annual Return:
1 Year	15.39%
5 Years	10.46%
10 Years	10.50%
Citigroup Non-U.S. World Government Bond Index
Average Annual Return:
1 Year	1.51%
5 Years	5.24%
10 Years	6.38%
Citigroup World Government Bond Index
Average Annual Return:
1 Year	1.65%
5 Years	5.27%
10 Years	6.04%
Barclays Capital U.S. Aggregate Bond Index
Average Annual Return:
1 Year	4.22%
5 Years	5.95%
10 Years	5.18%
Class A
Average Annual Return:
1 Year	8.10%
5 Years	5.21%
10 Years	7.55%
Inception Date	Oct. 16, 1989
Class A | Return After Taxes on Distributions
Average Annual Return:
1 Year	5.94%
5 Years	2.97%
10 Years	5.24%
Class A | Return After Taxes on Distributions and Sale of Fund Shares
Average Annual Return:
1 Year	5.19%
5 Years	3.07%
10 Years	5.11%
Class B
Average Annual Return:
1 Year	7.46%
5 Years	4.96%
10 Years	7.58%
Inception Date	Nov. 30, 1992
Class C
Average Annual Return:
1 Year	11.67%
5 Years	5.44%
10 Years	7.27%
Inception Date	May 26, 1995
Class N
Average Annual Return:
1 Year	12.05%
5 Years	5.80%
10 Years	7.62%
Inception Date	Mar. 01, 2001
Class Y
Average Annual Return:
1 Year	13.72%
5 Years	6.43%
10 Years	8.27%
Inception Date	Jan. 26, 1998

XML

Annual Fund Operating Expenses (dei_DocumentInformationDocumentAxis, (Oppenheimer Global Strategic Income Fund))	0 Months Ended
	Jan. 28, 2013
Class A
Operating Expenses:
Management Fees	0.51%	[1]
Distribution and/or Service (12b-1) Fees	0.24%
Other Expenses of the Fund	0.18%
Other Expenses of the Subsidiary	none	[2]
Other Expenses	0.18%
Acquired Fund Fees and Expenses	0.06%
Total Annual Fund Operating Expenses	0.99%
Fee Waiver and/or Expense Reimbursements	(0.05%)	[3]
Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursements	0.94%
Class B
Operating Expenses:
Management Fees	0.51%	[1]
Distribution and/or Service (12b-1) Fees	1.00%
Other Expenses of the Fund	0.33%
Other Expenses of the Subsidiary	none	[2]
Other Expenses	0.33%
Acquired Fund Fees and Expenses	0.06%
Total Annual Fund Operating Expenses	1.90%
Fee Waiver and/or Expense Reimbursements	(0.05%)	[3]
Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursements	1.85%
Class C
Operating Expenses:
Management Fees	0.51%	[1]
Distribution and/or Service (12b-1) Fees	1.00%
Other Expenses of the Fund	0.17%
Other Expenses of the Subsidiary	none	[2]
Other Expenses	0.17%
Acquired Fund Fees and Expenses	0.06%
Total Annual Fund Operating Expenses	1.74%
Fee Waiver and/or Expense Reimbursements	(0.05%)	[3]
Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursements	1.69%
Class I
Operating Expenses:
Management Fees	0.51%	[1],[4]
Distribution and/or Service (12b-1) Fees	none	[4]
Other Expenses of the Fund	0.08%	[4]
Other Expenses of the Subsidiary	none	[2],[4]
Other Expenses	0.08%	[4]
Acquired Fund Fees and Expenses	0.06%	[4]
Total Annual Fund Operating Expenses	0.65%	[4]
Fee Waiver and/or Expense Reimbursements	(0.05%)	[3],[4]
Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursements	0.60%	[4]
Class N
Operating Expenses:
Management Fees	0.51%	[1]
Distribution and/or Service (12b-1) Fees	0.50%
Other Expenses of the Fund	0.32%
Other Expenses of the Subsidiary	none	[2]
Other Expenses	0.32%
Acquired Fund Fees and Expenses	0.06%
Total Annual Fund Operating Expenses	1.39%
Fee Waiver and/or Expense Reimbursements	(0.05%)	[3]
Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursements	1.34%
Class Y
Operating Expenses:
Management Fees	0.51%	[1]
Distribution and/or Service (12b-1) Fees	none
Other Expenses of the Fund	0.23%
Other Expenses of the Subsidiary	none	[2]
Other Expenses	0.23%
Acquired Fund Fees and Expenses	0.06%
Total Annual Fund Operating Expenses	0.80%
Fee Waiver and/or Expense Reimbursements	(0.05%)	[3]
Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursements	0.75%

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

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

[3] The Manager has voluntarily agreed to waive fees and/or reimburse Fund expenses in an amount equal to the indirect management fees incurred through the Fund's investment in underlying funds managed by the Manager or its affiliates. This expense limitation may not be amended or withdrawn until one year after 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.

[4] Estimated expenses for the first full fiscal year that Class I shares are offered.