485BPOS

Registration No. 33-58383

File No. 811-07255

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, DC  20549

FORM N-1A

REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933	x
Pre-Effective Amendment No.	¨
Post-Effective Amendment No. 34	x
and/or
REGISTRATION STATEMENT UNDER THE INVESTMENT COMPANY ACT OF 1940	x
Amendment No. 36	x

OPPENHEIMER International Bond 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.

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)

¨ On ____________, pursuant to paragraph (b)

¨ 60 days after filing, pursuant to paragraph (a)(1)

¨ On _____________, pursuant to paragraph (a)(1)

¨ 75 days after filing, pursuant to paragraph (a)(2)

¨ On ______________, pursuant to paragraph (a)(2) of Rule 485.

If appropriate, check the following box:

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

 

SIGNATURES

Pursuant to the requirements of the Securities Act of 1933 and the Investment Company Act of 1940, the Registrant certifies that it meets all the requirements for effectiveness of this Registration Statement pursuant to Rule 485(b) under the Securities Act of 1933 and has duly caused this Registration Statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of New York and State of New York on the 13^th day of February, 2015.

OPPENHEIMER INTERNATIONAL BOND FUND
By:	Arthur P. Steinmetz*
	Arthur P. Steinmetz President and
	Principal Executive Officer

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	February 13, 2015
Sam Freedman	Board of Trustees
Arthur P. Steinmetz*	President and	February 13, 2015
Arthur P. Steinmetz	Principal Executive Officer
Brian W. Wixted*	Treasurer, Principal	February 13, 2015
Brian W. Wixted	Financial & Accounting Officer
William F. Glavin, Jr.*	Trustee	February 13, 2015
William F. Glavin, Jr.
Jon S. Fossel*	Trustee	February 13, 2015
Jon S. Fossel
Richard F. Grabish*	Trustee	February 13, 2015
Richard F. Grabish
Beverly L. Hamilton*	Trustee	February 13, 2015
Beverly L. Hamilton
Victoria J. Herget*	Trustee	February 13, 2015
Victoria J. Herget
Robert J. Malone*	Trustee	February 13, 2015
Robert J. Malone
F. William Marshall, Jr.*	Trustee	February 13, 2015
F. William Marshall, Jr.
Karen L. Stuckey*	Trustee	February 13, 2015
Karen L. Stuckey
James D. Vaughn*	Trustee	February 13, 2015
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

Label

Element

Value

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 51 and "Appendix A" in the Fund's Statement of Additional Information.

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

Shareholder Fees Caption [Text]

rr_ShareholderFeesCaption

Shareholder Fees (fees paid directly from your investment)

Operating Expenses Caption [Text]

rr_OperatingExpensesCaption

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

^[1]

Expenses Restated to Reflect Current [Text]

rr_ExpensesRestatedToReflectCurrent

Expenses have been restated to reflect current fees.

Expense Example Narrative [Text Block]

rr_ExpenseExampleNarrativeTextBlock

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

Expense Example by, Year, Caption [Text]

rr_ExpenseExampleByYearCaption

If shares are redeemed

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

rr_ExpenseExampleNoRedemptionByYearCaption

If shares are not redeemed

Portfolio Turnover [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 108% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

108.00%

Strategy Narrative [Text Block]

rr_StrategyNarrativeTextBlock

Principal Investment Strategies. The Fund invests mainly in debt securities of foreign government and corporate issuers. 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. The Fund can invest in various types of debt securities, generally referred to as "bonds," including government bonds, corporate debt obligations, "structured" notes, participation interests in loans, "zero coupon" or "stripped" securities, certain mortgage-related securities or asset-backed securities and other debt obligations.

Under normal market conditions, the Fund invests at least 80% of its net assets (plus borrowings for investment purposes) in debt securities. The Fund typically invests in at least three countries other than the United States. The Fund invests in debt securities of issuers in both developed and emerging markets throughout the world.

The Fund may buy securities issued by companies of any size or market capitalization range and at times might emphasize securities of issuers in a particular capitalization range. It can invest in debt securities having short, intermediate or long maturities.

The Fund does not limit its investments to a particular credit quality or rating category and can invest without limit in securities rated below investment grade (commonly called "junk bonds"). "Investment grade" debt securities are rated in one of the top four categories by nationally recognized statistical rating organizations such as Moody's Investors Service or Standard & Poor's. The Fund may also invest in unrated securities, in which case the Fund's investment 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.

The Fund may also use derivatives to seek increased returns or to try to manage investment risks, including, for example, options, forward contracts, futures 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.

In selecting securities, the portfolio managers evaluate the overall investment opportunities and risks in individual national economies. The portfolio managers analyze the business cycle, political and macro-economic factors that affect exchange rates and interest rates in both emerging market and developing countries. The portfolio managers currently focus on investment opportunities for higher yields than are available in U.S. markets and opportunities in investments denominated in foreign currencies that compare favorably to the U.S. dollar. These factors may vary in particular cases and may change over time.

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 50% of the Citigroup Non-U.S. Dollar World Government Bond Index, 30% of the JPMorgan Government Bond Index - Emerging Markets Global Diversified, and 20% of the JPMorgan Emerging Markets Bond Index Global Diversified. From January 1, 2003 through December 31, 2011, the underlying index weights were 70% Citigroup Non-U.S. Dollar World Government Bond Index, 20% JPMorgan Government Bond Index - Emerging Markets Global Diversified and 10% JPMorgan Emerging Markets Bond Index Global Diversified. The Reference Index returns reflect the weightings in effect for the time periods for which fund returns are disclosed, and weightings prior to January 1, 2012 are not restated. The Fund is not managed to be invested in the same percentages as those indices comprising the Reference Index.

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.

Risks of Investing in Debt Securities. Debt securities may be subject to interest rate risk, duration risk, credit risk, credit spread risk, extension risk, reinvestment risk, prepayment risk and event risk. 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. Risks associated with rising interest rates are heightened given that interest rates in the U.S. are at, or near, historic lows. Duration risk is the risk that longer-duration debt securities will be more volatile and more likely to decline in price in a rising interest rate environment than shorter-duration debt securities. 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. "Credit spread" is the difference in yield between securities that is due to differences in their credit quality. There is a risk that credit spreads may increase when the market expects lower-grade bonds to default more frequently. Widening credit spreads may quickly reduce the market values of the Fund's lower-rated and unrated securities. Some unrated securities may not have an active trading market or may trade less actively than rated securities, which means that the Fund might have difficulty selling them promptly at an acceptable price. Extension risk is the risk that an increase in interest rates could cause principal payments on a debt security to be repaid at a slower rate than expected. Extension risk is particularly prevalent for a callable security where an increase in interest rates could result in the issuer of that security choosing not to redeem the security as anticipated on the security's call date. Such a decision by the issuer could have the effect of lengthening the debt security's expected maturity, making it more vulnerable to interest rate risk and reducing its market value. Reinvestment risk is the risk that when interest rates fall the Fund may be required to reinvest the proceeds from a security's sale or redemption at a lower interest rate. Callable bonds are generally subject to greater reinvestment risk than non-callable bonds. Prepayment risk is the risk that the issuer may redeem the security prior to the expected maturity or that borrowers may repay the loans that underlie these securities more quickly than expected, thereby causing the issuer of the security to repay the principal prior to the expected maturity. The Fund may need to reinvest the proceeds at a lower interest rate, reducing its income. 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.

Fixed-Income Market Risks. The fixed-income securities market can be susceptible to increases in volatility and decreases in liquidity. Liquidity may decline unpredictably in response to overall economic conditions or credit tightening. During times of reduced market liquidity, the Fund may not be able to readily sell bonds at the prices at which they are carried on the Fund's books and could experience a loss. If the Fund needed to sell large blocks of bonds to meet shareholder redemption requests or to raise cash, those sales could further reduce the bonds' prices, particularly for lower-rated and unrated securities. An unexpected increase in redemptions by Fund shareholders-which may be triggered by general market turmoil or an increase in interest rates-could cause the Fund to sell its holdings at a loss or at undesirable prices.

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 may impact the market price or value of those debt securities and may 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 may cause reduced liquidity in certain debt securities markets, reducing the willingness of some lenders to extend credit, and making it more difficult for borrowers to obtain financing on attractive terms (or at all). 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.

Risks of Below-Investment-Grade Securities. Below-investment-grade debt securities (also referred to as "junk" bonds), whether rated or unrated, may be subject to greater price fluctuations than investment-grade securities, increased credit risk and a greater risk that the issuer might not be able to pay interest and principal when due, especially during times of weakening economic conditions or rising interest rates. The market for below-investment-grade securities may be less liquid and therefore these securities may be harder to value or sell at an acceptable price, especially during times of market volatility or decline.

Because the Fund can invest without limit in below-investment-grade securities, the Fund's credit risks are greater than those of funds that buy only investment-grade securities. Credit rating downgrades of a single issuer or related similar issuers whose securities the Fund holds in significant amounts could substantially and unexpectedly increase the Fund's exposure to below-investment-grade securities and the risks associated with them, especially liquidity and default risk.

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.

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.

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.

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 and those countries are more likely to experience instability resulting from rapid changes or developments in social, political and economic conditions. 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.

Eurozone Investment Risks. Certain of the regions in which the Fund invests, including the European Union (EU), currently experience significant financial difficulties. Following the recent global economic crisis, some of these countries have depended on, and may continue to be dependent on, the assistance from others such as the European Central Bank (ECB) or other governments or institutions, and failure to implement reforms as a condition of assistance could have a significant adverse effect on the value of investments in those and other European countries. In addition, countries that have adopted the euro are subject to fiscal and monetary controls that could limit the ability to implement their own economic policies, and could voluntarily abandon, or be forced out of, the euro. Such events could impact the market values of Eurozone and various other securities and currencies, cause redenomination of certain securities into less valuable local currencies, and create more volatile and illiquid markets.

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

Risks of Derivative Investments. Derivatives may involve significant risks. Derivatives may be more volatile than other types of investments, may require the payment of premiums, may increase portfolio turnover, may be illiquid, and may not perform as expected. Derivatives are subject to counterparty risk and the Fund may lose money on a derivative investment if the issuer or counterparty fails to pay the amount due. Some derivatives have the potential for unlimited loss, regardless of the size of the Fund's initial investment. 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. In addition, under new rules enacted and currently being implemented under financial reform legislation, certain over-the-counter derivatives are (or soon will be) required to be executed on a regulated market and/or cleared through a clearinghouse. It is unclear how these regulatory changes will affect counterparty risk, and entering into a derivative transaction with a clearinghouse may entail further risks and costs.

Risks of Non-Diversification. The Fund is classified as a "non-diversified" fund under the Investment Company Act of 1940. Accordingly, the Fund may invest a greater portion of its assets in the securities of a single issuer than if it were a "diversified" fund. To the extent that the Fund invests a higher percentage of its assets in the securities of a single issuer, the Fund is more subject to the risks associated with and developments affecting that issuer than a fund that invests more widely.

Who Is the Fund Designed For? The Fund is designed primarily for investors seeking total return. Those investors should be willing to assume the risks of short-term share price fluctuations of a fund that focuses on debt investments in foreign securities, including those in emerging markets. The Fund is intended to be a long-term investment, not a short-term trading vehicle. Because the Fund's income will fluctuate, it is not designed for investors needing an assured level of current income. The Fund is not a complete investment program. You should carefully consider your own investment goals and risk tolerance before investing in the Fund.

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

Risk Nondiversified Status [Text]

rr_RiskNondiversifiedStatus

Risks of Non-Diversification. The Fund is classified as a "non-diversified" fund under the Investment Company Act of 1940. Accordingly, the Fund may invest a greater portion of its assets in the securities of a single issuer than if it were a "diversified" fund. To the extent that the Fund invests a higher percentage of its assets in the securities of a single issuer, the Fund is more subject to the risks associated with and developments affecting that issuer than a fund that invests more widely.

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 calendar year to calendar year and by showing how the Fund's average annual returns for the periods of time shown in the table compare with those of a broad measure of market performance 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/InternationalBondFund

Bar Chart Does Not Reflect Sales Loads [Text]

rr_BarChartDoesNotReflectSalesLoads

Sales charges and taxes are not included and the returns would be lower if they were.

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 9.14% (2nd Qtr 09) and the lowest return for a calendar quarter was -6.91% (3rd Qtr 08). For the period from January 1, 2014 through December 31, 2014 the cumulative return before sales charges and taxes was 0.33%.

Performance Table Heading

rr_PerformanceTableHeading

Average Annual Total Returns for the periods ended December 31, 2014

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 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 Past Does Not Indicate Future [Text]

rr_PerformancePastDoesNotIndicateFuture

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

Performance 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 Availability Website Address [Text]

rr_PerformanceAvailabilityWebSiteAddress

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

Citigroup Non-U.S. Dollar World Government Bond Index (reflects no deduction for fees, expenses or taxes)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

(2.68%)

5 Years (or life of class, if less)

rr_AverageAnnualReturnYear05

0.85%

10 Years (or life of class, if less)

rr_AverageAnnualReturnYear10

2.64%

Citigroup Non-U.S. Dollar World Government Bond Index  (reflects no deduction for fees, expenses or taxes)

Risk/Return:

rr_RiskReturnAbstract

5 Years (or life of class, if less)

rr_AverageAnnualReturnYear05

(2.62%)

^[2]

JP Morgan Government Bond Index (reflects no deduction for fees, expenses or taxes)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

(5.72%)

5 Years (or life of class, if less)

rr_AverageAnnualReturnYear05

2.63%

10 Years (or life of class, if less)

rr_AverageAnnualReturnYear10

6.65%

JP Morgan Government Bond Index  (reflects no deduction for fees, expenses or taxes)

Risk/Return:

rr_RiskReturnAbstract

5 Years (or life of class, if less)

rr_AverageAnnualReturnYear05

(2.35%)

^[2]

JP Morgan Emerging Markets Bond Index (reflects no deduction for fees, expenses or taxes)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

7.43%

5 Years (or life of class, if less)

rr_AverageAnnualReturnYear05

7.56%

10 Years (or life of class, if less)

rr_AverageAnnualReturnYear10

7.77%

JP Morgan Emerging Markets Bond Index  (reflects no deduction for fees, expenses or taxes)

Risk/Return:

rr_RiskReturnAbstract

5 Years (or life of class, if less)

rr_AverageAnnualReturnYear05

5.74%

^[2]

Reference Index (reflects no deduction for fees, expenses or taxes)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

(1.58%)

5 Years (or life of class, if less)

rr_AverageAnnualReturnYear05

5.87%

10 Years (or life of class, if less)

rr_AverageAnnualReturnYear10

6.42%

Reference Index  (reflects no deduction for fees, expenses or taxes)

Risk/Return:

rr_RiskReturnAbstract

5 Years (or life of class, if less)

rr_AverageAnnualReturnYear05

4.02%

^[2]

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%

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

rr_DistributionAndService12b1FeesOverAssets

0.25%

Other Expenses

rr_OtherExpensesOverAssets

0.24%

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

1.00%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

573

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

780

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

1,004

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,647

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

573

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

780

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

1,004

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

1,647

Annual Return 2005

rr_AnnualReturn2005

3.29%

Annual Return 2006

rr_AnnualReturn2006

8.65%

Annual Return 2007

rr_AnnualReturn2007

13.59%

Annual Return 2008

rr_AnnualReturn2008

(0.69%)

Annual Return 2009

rr_AnnualReturn2009

13.07%

Annual Return 2010

rr_AnnualReturn2010

7.87%

Annual Return 2011

rr_AnnualReturn2011

(0.28%)

Annual Return 2012

rr_AnnualReturn2012

10.77%

Annual Return 2013

rr_AnnualReturn2013

(4.16%)

Annual Return 2014

rr_AnnualReturn2014

0.33%

Year to Date Return, Label

rr_YearToDateReturnLabel

For the period from January 1, 2014 through December 31, 2014 the cumulative return before sales charges and taxes was 0.33%.

Bar Chart, Year to Date Return

rr_BarChartYearToDateReturn

0.33%

Bar Chart, Year to Date Return, Date

rr_BarChartYearToDateReturnDate

Dec. 31, 2014

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

highest return for a calendar quarter was 9.14% (2nd Qtr 09)

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

9.14%

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Jun. 30, 2009

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

lowest return for a calendar quarter was -6.91% (3rd Qtr 08)

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(6.91%)

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Sep. 30, 2008

1 Year

rr_AverageAnnualReturnYear01

(4.44%)

5 Years (or life of class, if less)

rr_AverageAnnualReturnYear05

1.76%

10 Years (or life of class, if less)

rr_AverageAnnualReturnYear10

4.56%

Inception Date

rr_AverageAnnualReturnInceptionDate

Jun. 15, 1995

Class A | Return After Taxes on Distributions

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

(5.67%)

5 Years (or life of class, if less)

rr_AverageAnnualReturnYear05

0.20%

10 Years (or life of class, if less)

rr_AverageAnnualReturnYear10

2.74%

Class A | Return After Taxes on Distributions and Sale of Fund Shares

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

(2.51%)

5 Years (or life of class, if less)

rr_AverageAnnualReturnYear05

0.81%

10 Years (or life of class, if less)

rr_AverageAnnualReturnYear10

2.88%

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%

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

rr_DistributionAndService12b1FeesOverAssets

1.00%

Other Expenses

rr_OtherExpensesOverAssets

0.24%

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

1.75%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

679

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

856

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

1,157

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,695

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

179

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

556

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

957

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

1,695

1 Year

rr_AverageAnnualReturnYear01

(5.47%)

5 Years (or life of class, if less)

rr_AverageAnnualReturnYear05

1.55%

10 Years (or life of class, if less)

rr_AverageAnnualReturnYear10

4.53%

Inception Date

rr_AverageAnnualReturnInceptionDate

Jun. 15, 1995

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%

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

rr_DistributionAndService12b1FeesOverAssets

1.00%

Other Expenses

rr_OtherExpensesOverAssets

0.24%

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

1.75%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

279

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

556

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

957

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

2,080

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

179

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

556

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

957

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

2,080

1 Year

rr_AverageAnnualReturnYear01

(1.56%)

5 Years (or life of class, if less)

rr_AverageAnnualReturnYear05

2.04%

10 Years (or life of class, if less)

rr_AverageAnnualReturnYear10

4.31%

Inception Date

rr_AverageAnnualReturnInceptionDate

Jun. 15, 1995

Class R

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%

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

rr_DistributionAndService12b1FeesOverAssets

0.50%

Other Expenses

rr_OtherExpensesOverAssets

0.24%

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

1.25%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

128

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

399

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

691

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,521

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

128

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

399

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

691

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

1,521

1 Year

rr_AverageAnnualReturnYear01

(0.90%)

5 Years (or life of class, if less)

rr_AverageAnnualReturnYear05

2.38%

10 Years (or life of class, if less)

rr_AverageAnnualReturnYear10

4.65%

Inception Date

rr_AverageAnnualReturnInceptionDate

Mar. 01, 2001

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%

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

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

0.24%

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

0.75%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

77

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

241

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

418

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

934

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

77

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

241

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

418

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

934

1 Year

rr_AverageAnnualReturnYear01

0.41%

5 Years (or life of class, if less)

rr_AverageAnnualReturnYear05

3.00%

10 Years (or life of class, if less)

rr_AverageAnnualReturnYear10

5.40%

Inception Date

rr_AverageAnnualReturnInceptionDate

Sep. 27, 2004

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%

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

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

0.05%

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

0.56%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

57

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

180

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

314

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

703

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

57

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

180

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

314

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 703

1 Year

rr_AverageAnnualReturnYear01

0.77%

5 Years (or life of class, if less)

rr_AverageAnnualReturnYear05

1.65%

10 Years (or life of class, if less)

rr_AverageAnnualReturnYear10

Inception Date

rr_AverageAnnualReturnInceptionDate

Jan. 27, 2012

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

[2] As of 1/31/12.

XML

(Oppenheimer International Bond 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 51 and "Appendix A" in the Fund's Statement of Additional Information.

Shareholder Fees (fees paid directly from your investment)

Shareholder Fees (Oppenheimer International Bond Fund)	Class A	Class B	Class C	Class R	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%	none	none	none

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

^[1]

Annual Fund Operating Expenses (Oppenheimer International Bond Fund)	Class A	Class B	Class C	Class R	Class Y	Class I
Management Fees	0.51%	0.51%	0.51%	0.51%	0.51%	0.51%
Distribution and/or Service (12b-1) Fees	0.25%	1.00%	1.00%	0.50%	none	none
Other Expenses	0.24%	0.24%	0.24%	0.24%	0.24%	0.05%
Total Annual Fund Operating Expenses	1.00%	1.75%	1.75%	1.25%	0.75%	0.56%

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 International Bond Fund) (USD $)	1 Year	3 Years	5 Years	10 Years
Class A	573	780	1,004	1,647
Class B	679	856	1,157	1,695
Class C	279	556	957	2,080
Class R	128	399	691	1,521
Class Y	77	241	418	934
Class I	57	180	314	703

If shares are not redeemed

Expense Example, No Redemption (Oppenheimer International Bond Fund) (USD $)	1 Year	3 Years	5 Years	10 Years
Class A	573	780	1,004	1,647
Class B	179	556	957	1,695
Class C	179	556	957	2,080
Class R	128	399	691	1,521
Class Y	77	241	418	934
Class I	57	180	314	703

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 108% of the average value of its portfolio.

Principal Investment Strategies. The Fund invests mainly in debt securities of foreign government and corporate issuers. 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. The Fund can invest in various types of debt securities, generally referred to as "bonds," including government bonds, corporate debt obligations, "structured" notes, participation interests in loans, "zero coupon" or "stripped" securities, certain mortgage-related securities or asset-backed securities and other debt obligations.

Under normal market conditions, the Fund invests at least 80% of its net assets (plus borrowings for investment purposes) in debt securities. The Fund typically invests in at least three countries other than the United States. The Fund invests in debt securities of issuers in both developed and emerging markets throughout the world.

The Fund may buy securities issued by companies of any size or market capitalization range and at times might emphasize securities of issuers in a particular capitalization range. It can invest in debt securities having short, intermediate or long maturities.

The Fund does not limit its investments to a particular credit quality or rating category and can invest without limit in securities rated below investment grade (commonly called "junk bonds"). "Investment grade" debt securities are rated in one of the top four categories by nationally recognized statistical rating organizations such as Moody's Investors Service or Standard & Poor's. The Fund may also invest in unrated securities, in which case the Fund's investment 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.

The Fund may also use derivatives to seek increased returns or to try to manage investment risks, including, for example, options, forward contracts, futures 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.

In selecting securities, the portfolio managers evaluate the overall investment opportunities and risks in individual national economies. The portfolio managers analyze the business cycle, political and macro-economic factors that affect exchange rates and interest rates in both emerging market and developing countries. The portfolio managers currently focus on investment opportunities for higher yields than are available in U.S. markets and opportunities in investments denominated in foreign currencies that compare favorably to the U.S. dollar. These factors may vary in particular cases and may change over time.

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 50% of the Citigroup Non-U.S. Dollar World Government Bond Index, 30% of the JPMorgan Government Bond Index - Emerging Markets Global Diversified, and 20% of the JPMorgan Emerging Markets Bond Index Global Diversified. From January 1, 2003 through December 31, 2011, the underlying index weights were 70% Citigroup Non-U.S. Dollar World Government Bond Index, 20% JPMorgan Government Bond Index - Emerging Markets Global Diversified and 10% JPMorgan Emerging Markets Bond Index Global Diversified. The Reference Index returns reflect the weightings in effect for the time periods for which fund returns are disclosed, and weightings prior to January 1, 2012 are not restated. The Fund is not managed to be invested in the same percentages as those indices comprising the Reference Index.

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.

Risks of Investing in Debt Securities. Debt securities may be subject to interest rate risk, duration risk, credit risk, credit spread risk, extension risk, reinvestment risk, prepayment risk and event risk. 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. Risks associated with rising interest rates are heightened given that interest rates in the U.S. are at, or near, historic lows. Duration risk is the risk that longer-duration debt securities will be more volatile and more likely to decline in price in a rising interest rate environment than shorter-duration debt securities. 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. "Credit spread" is the difference in yield between securities that is due to differences in their credit quality. There is a risk that credit spreads may increase when the market expects lower-grade bonds to default more frequently. Widening credit spreads may quickly reduce the market values of the Fund's lower-rated and unrated securities. Some unrated securities may not have an active trading market or may trade less actively than rated securities, which means that the Fund might have difficulty selling them promptly at an acceptable price. Extension risk is the risk that an increase in interest rates could cause principal payments on a debt security to be repaid at a slower rate than expected. Extension risk is particularly prevalent for a callable security where an increase in interest rates could result in the issuer of that security choosing not to redeem the security as anticipated on the security's call date. Such a decision by the issuer could have the effect of lengthening the debt security's expected maturity, making it more vulnerable to interest rate risk and reducing its market value. Reinvestment risk is the risk that when interest rates fall the Fund may be required to reinvest the proceeds from a security's sale or redemption at a lower interest rate. Callable bonds are generally subject to greater reinvestment risk than non-callable bonds. Prepayment risk is the risk that the issuer may redeem the security prior to the expected maturity or that borrowers may repay the loans that underlie these securities more quickly than expected, thereby causing the issuer of the security to repay the principal prior to the expected maturity. The Fund may need to reinvest the proceeds at a lower interest rate, reducing its income. 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.

Fixed-Income Market Risks. The fixed-income securities market can be susceptible to increases in volatility and decreases in liquidity. Liquidity may decline unpredictably in response to overall economic conditions or credit tightening. During times of reduced market liquidity, the Fund may not be able to readily sell bonds at the prices at which they are carried on the Fund's books and could experience a loss. If the Fund needed to sell large blocks of bonds to meet shareholder redemption requests or to raise cash, those sales could further reduce the bonds' prices, particularly for lower-rated and unrated securities. An unexpected increase in redemptions by Fund shareholders-which may be triggered by general market turmoil or an increase in interest rates-could cause the Fund to sell its holdings at a loss or at undesirable prices.

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 may impact the market price or value of those debt securities and may 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 may cause reduced liquidity in certain debt securities markets, reducing the willingness of some lenders to extend credit, and making it more difficult for borrowers to obtain financing on attractive terms (or at all). 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.

Risks of Below-Investment-Grade Securities. Below-investment-grade debt securities (also referred to as "junk" bonds), whether rated or unrated, may be subject to greater price fluctuations than investment-grade securities, increased credit risk and a greater risk that the issuer might not be able to pay interest and principal when due, especially during times of weakening economic conditions or rising interest rates. The market for below-investment-grade securities may be less liquid and therefore these securities may be harder to value or sell at an acceptable price, especially during times of market volatility or decline.

Because the Fund can invest without limit in below-investment-grade securities, the Fund's credit risks are greater than those of funds that buy only investment-grade securities. Credit rating downgrades of a single issuer or related similar issuers whose securities the Fund holds in significant amounts could substantially and unexpectedly increase the Fund's exposure to below-investment-grade securities and the risks associated with them, especially liquidity and default risk.

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.

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.

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.

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 and those countries are more likely to experience instability resulting from rapid changes or developments in social, political and economic conditions. 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.

Eurozone Investment Risks. Certain of the regions in which the Fund invests, including the European Union (EU), currently experience significant financial difficulties. Following the recent global economic crisis, some of these countries have depended on, and may continue to be dependent on, the assistance from others such as the European Central Bank (ECB) or other governments or institutions, and failure to implement reforms as a condition of assistance could have a significant adverse effect on the value of investments in those and other European countries. In addition, countries that have adopted the euro are subject to fiscal and monetary controls that could limit the ability to implement their own economic policies, and could voluntarily abandon, or be forced out of, the euro. Such events could impact the market values of Eurozone and various other securities and currencies, cause redenomination of certain securities into less valuable local currencies, and create more volatile and illiquid markets.

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

Risks of Derivative Investments. Derivatives may involve significant risks. Derivatives may be more volatile than other types of investments, may require the payment of premiums, may increase portfolio turnover, may be illiquid, and may not perform as expected. Derivatives are subject to counterparty risk and the Fund may lose money on a derivative investment if the issuer or counterparty fails to pay the amount due. Some derivatives have the potential for unlimited loss, regardless of the size of the Fund's initial investment. 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. In addition, under new rules enacted and currently being implemented under financial reform legislation, certain over-the-counter derivatives are (or soon will be) required to be executed on a regulated market and/or cleared through a clearinghouse. It is unclear how these regulatory changes will affect counterparty risk, and entering into a derivative transaction with a clearinghouse may entail further risks and costs.

Risks of Non-Diversification. The Fund is classified as a "non-diversified" fund under the Investment Company Act of 1940. Accordingly, the Fund may invest a greater portion of its assets in the securities of a single issuer than if it were a "diversified" fund. To the extent that the Fund invests a higher percentage of its assets in the securities of a single issuer, the Fund is more subject to the risks associated with and developments affecting that issuer than a fund that invests more widely.

Who Is the Fund Designed For? The Fund is designed primarily for investors seeking total return. Those investors should be willing to assume the risks of short-term share price fluctuations of a fund that focuses on debt investments in foreign securities, including those in emerging markets. The Fund is intended to be a long-term investment, not a short-term trading vehicle. Because the Fund's income will fluctuate, it is not designed for investors needing an assured level of current income. The Fund is not a complete investment program. You should carefully consider your own investment goals and risk tolerance before investing in the Fund.

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

The Fund's Past Performance. The bar chart and table below provide some indication of the risks of investing in the Fund by showing changes in the Fund's performance (for Class A shares) from calendar year to calendar year and by showing how the Fund's average annual returns for the periods of time shown in the table compare with those of a broad measure of market performance 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/InternationalBondFund

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 9.14% (2nd Qtr 09) and the lowest return for a calendar quarter was -6.91% (3rd Qtr 08). For the period from January 1, 2014 through December 31, 2014 the cumulative return before sales charges and taxes was 0.33%.

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.

Average Annual Total Returns for the periods ended December 31, 2014

Average Annual Total Returns (Oppenheimer International Bond Fund)		Inception Date	1 Year	5 Years (or life of class, if less)	10 Years (or life of class, if less)
Class A		Jun. 15, 1995	(4.44%)	1.76%	4.56%
Class A Return After Taxes on Distributions			(5.67%)	0.20%	2.74%
Class A Return After Taxes on Distributions and Sale of Fund Shares			(2.51%)	0.81%	2.88%
Class B		Jun. 15, 1995	(5.47%)	1.55%	4.53%
Class C		Jun. 15, 1995	(1.56%)	2.04%	4.31%
Class R		Mar. 01, 2001	(0.90%)	2.38%	4.65%
Class Y		Sep. 27, 2004	0.41%	3.00%	5.40%
Class I		Jan. 27, 2012	0.77%	1.65%
Citigroup Non-U.S. Dollar World Government Bond Index (reflects no deduction for fees, expenses or taxes)			(2.68%)	0.85%	2.64%
Citigroup Non-U.S. Dollar World Government Bond Index  (reflects no deduction for fees, expenses or taxes)	[1]			(2.62%)
JP Morgan Government Bond Index (reflects no deduction for fees, expenses or taxes)			(5.72%)	2.63%	6.65%
JP Morgan Government Bond Index  (reflects no deduction for fees, expenses or taxes)	[1]			(2.35%)
JP Morgan Emerging Markets Bond Index (reflects no deduction for fees, expenses or taxes)			7.43%	7.56%	7.77%
JP Morgan Emerging Markets Bond Index  (reflects no deduction for fees, expenses or taxes)	[1]			5.74%
Reference Index (reflects no deduction for fees, expenses or taxes)			(1.58%)	5.87%	6.42%
Reference Index  (reflects no deduction for fees, expenses or taxes)	[1]			4.02%

[1] As of 1/31/12.

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

XML

Label	Element	Value
Risk/Return:	rr_RiskReturnAbstract
Document Type	dei_DocumentType	485BPOS
Document Period End Date	dei_DocumentPeriodEndDate	Sep. 30, 2014
Registrant Name	dei_EntityRegistrantName	OPPENHEIMER INTERNATIONAL BOND FUND
Central Index Key	dei_EntityCentralIndexKey	0000939800
Amendment Flag	dei_AmendmentFlag	false
Document Creation Date	dei_DocumentCreationDate	Jan. 26, 2015
Document Effective Date	dei_DocumentEffectiveDate	Jan. 28, 2015
Prospectus Date	rr_ProspectusDate	Jan. 28, 2015