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T. Rowe Price Institutional Emerging Markets Bond Fund  
Risk/Return: rr_RiskReturnAbstract  
Risk/Return [Heading] rr_RiskReturnHeading Institutional Emerging Markets Bond Fund
Objective [Heading] rr_ObjectiveHeading Investment Objective(s)
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock

The fund seeks to provide high income and capital appreciation.
Expense [Heading] rr_ExpenseHeading Fees and Expenses
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock

This table describes the fees and expenses that you may pay if you buy, hold, and sell shares of the fund. You may also incur brokerage commissions and other charges when buying or selling shares of the fund, which are not reflected in the table or example below.
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 [Heading] rr_PortfolioTurnoverHeading Portfolio Turnover
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock 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 the fund’s shares are held in a taxable account. These costs, which are not reflected in 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 37.7% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 37.70%
Expense Example [Heading] rr_ExpenseExampleHeading Example
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock This 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 the fund for the time periods indicated and then redeem all of your shares at the end of those periods, 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 costs would be:
Strategy [Heading] rr_StrategyHeading Principal Investment Strategies
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock

The fund will normally invest at least 80% (and potentially all) of its net assets (including any borrowings for investment purposes) in debt securities of emerging market governments or companies located in emerging market countries. The fund considers frontier markets to be a subset of emerging markets and any investments in frontier markets will be counted toward the fund’s 80% investment policy. The fund relies on a classification by either JP Morgan or the International Monetary Fund to determine which countries are emerging markets.

The fund’s holdings may be denominated in U.S. dollars or non-U.S. dollar currencies, including emerging market currencies. The extent, if any, to which the fund attempts to cushion the impact of foreign currency fluctuations on the U.S. dollar depends on market conditions. The fund’s holdings may include the lowest-rated bonds, including those in default, and there are no overall limits on the fund’s investments that are rated below investment-grade (BB or lower, or an equivalent rating), also known as “junk” bonds.

Although the fund expects to maintain an intermediate- to long-term weighted average maturity, there are no maturity restrictions on the overall portfolio or on individual securities. Security selection relies heavily on research, which analyzes political and economic trends as well as creditworthiness. The fund allocates investments among a variety of emerging markets (1) in order to establish a diverse portfolio; (2) based on the relative value of opportunities and associated risks within one country versus others; and (3) with a view to the liquidity of each particular market. The fund tends to favor bonds it expects will be upgraded.

While most assets will be invested in foreign bonds, the fund may use interest rate futures and forward foreign currency exchange contracts in keeping with its objective(s). Interest rate futures are primarily used as an efficient means of managing the fund’s exposure to interest rate changes and to adjust the fund’s duration. Forward foreign currency exchange contracts are primarily used to help protect the fund’s non-U.S. dollar denominated holdings from unfavorable changes in foreign currency exchange rates, although other currency hedging techniques may be used from time to time.
Strategy Portfolio Concentration [Text] rr_StrategyPortfolioConcentration The fund will normally invest at least 80% (and potentially all) of its net assets (including any borrowings for investment purposes) in debt securities of emerging market governments or companies located in emerging market countries. The fund considers frontier markets to be a subset of emerging markets and any investments in frontier markets will be counted toward the fund’s 80% investment policy. The fund relies on a classification by either JP Morgan or the International Monetary Fund to determine which countries are emerging markets.
Risk [Heading] rr_RiskHeading Principal Risks
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock

As with any fund, there is no guarantee that the fund will achieve its objective(s). The fund’s share price fluctuates, which means you could lose money by investing in the fund. The principal risks of investing in this fund, which may be even greater in bad or uncertain market conditions, are summarized as follows:

Emerging markets Investments in emerging market countries are subject to greater risk and overall volatility than investments in the U.S. and other developed markets. Emerging market countries tend to have economic structures that are less diverse and mature, less developed legal and regulatory regimes, and political systems that are less stable, than those of developed countries. In addition to the risks associated with investing outside the U.S., emerging markets are more susceptible to governmental interference, political and economic uncertainty, local taxes and restrictions on the fund’s investments, less efficient trading markets with lower overall liquidity, and more volatile currency exchange rates.

International investing Investing in the securities of non-U.S. issuers involves special risks not typically associated with investing in U.S. issuers. Non-U.S. securities tend to be more volatile and have lower overall liquidity than investments in U.S. securities and may lose value because of adverse local, political, social, or economic developments overseas, or due to changes in the exchange rates between foreign currencies and the U.S. dollar. In addition, investments outside the U.S. are subject to settlement practices and regulatory and financial reporting standards that differ from those of the U.S. The risks of investing outside the U.S. are

heightened for any investments in emerging markets, which are susceptible to greater volatility than investments in developed markets.

Market conditions The value of the fund’s investments may decrease, sometimes rapidly or unexpectedly, due to factors affecting an issuer held by the fund, particular industries, or the overall securities markets. A variety of factors can increase the volatility of the fund’s holdings and markets generally, including political or regulatory developments, recessions, inflation, rapid interest rate changes, war, military conflict, or acts of terrorism, natural disasters, and outbreaks of infectious illnesses or other widespread public health issues such as the coronavirus pandemic and related governmental and public responses (including sanctions). Certain events may cause instability across global markets, including reduced liquidity and disruptions in trading markets, while some events may affect certain geographic regions, countries, sectors, and industries more significantly than others. Government intervention in markets may impact interest rates, market volatility, and security pricing. These adverse developments may cause broad declines in market value due to short-term market movements or for significantly longer periods during more prolonged market downturns.

Frontier markets Frontier markets generally have smaller economies and less mature capital markets than emerging markets. As a result, the risks associated with investing in emerging market countries are magnified in frontier market countries. Frontier markets are more susceptible to abrupt changes in currency values, have less mature markets and settlement practices, and can have lower trading volumes that could lead to greater price volatility and illiquidity. Investor protections in frontier market countries may be limited and settlement procedures and custody services may prove inadequate in certain markets.

Investing in Latin America Many Latin American countries have histories of inflation, government overspending, political and economic instability, high interest and unemployment rates, and extreme currency fluctuations. Many of these countries tend to be highly reliant on the exportation of commodities so their economies may be significantly impacted by fluctuations in commodity prices and the global demand for certain commodities.

Investing in Africa and the Middle East Many African and Middle Eastern countries have histories of dictatorships, political and military unrest, social instability, and financial troubles, and their markets should be considered extremely volatile even when compared with those of other emerging market countries. Many of these countries tend to be highly reliant on exporting oil and other commodities so their economies can be significantly impacted by fluctuations in commodity prices and the global demand for certain commodities.

Currency exposure Because the fund invests in securities issued in foreign currencies, the fund is subject to the risk that it could experience losses based solely on the weakness of foreign currencies versus the U.S. dollar and changes in the exchange rates between such currencies and the U.S. dollar.

Fixed income markets Economic and other market developments can adversely affect the fixed income securities markets. At times, participants in these markets may develop concerns about the ability of certain issuers of debt instruments to make timely principal and interest

payments, or they may develop concerns about the ability of financial institutions that make markets in certain debt instruments to facilitate an orderly market. Those concerns could cause increased volatility and reduced liquidity in particular securities or in the overall fixed income markets and the related derivatives markets. A lack of liquidity or other adverse credit market conditions may hamper the fund’s ability to sell the debt instruments in which it invests or to find and purchase suitable debt instruments.

 

Junk investing Investments in bonds that are rated below investment grade, commonly referred to as junk bonds, expose the fund to greater volatility and credit risk than investments in bonds that are rated investment grade. Issuers of junk bonds are usually not as strong financially and are more likely to suffer an adverse change in financial condition that would result in the inability to meet a financial obligation. As a result, bonds rated below investment grade carry a higher risk of default and should be considered speculative.

Credit quality An issuer of a debt instrument could suffer an adverse change in financial condition that results in a payment default (failure to make scheduled interest or principal payments), rating downgrade, or inability to meet a financial obligation. Securities that are rated below investment grade carry greater risk of default and should be considered speculative.

Interest rates The prices of, and the income generated by, debt instruments held by the fund may be affected by changes in interest rates. A rise in interest rates typically causes the price of a fixed rate debt instrument to fall and its yield to rise. Conversely, a decline in interest rates typically causes the price of a fixed rate debt instrument to rise and the yield to fall. Generally, funds with longer weighted average maturities and durations carry greater interest rate risk. Changes in monetary policy made by central banks and/or governments, such as the discontinuation and replacement of benchmark rates, are likely to affect the level of interest rates.

Derivatives The use of interest rate futures and forward currency exchange contracts exposes the fund to additional volatility in comparison to investing directly in bonds and other debt instruments. These instruments may lack liquidity and be difficult to value, may involve leverage so that small changes produce disproportionate losses for the fund and, if not traded on an exchange, are subject to the risk that a counterparty to the transaction will fail to meet its obligations under the derivatives contract. The fund’s principal use of derivatives involves the risk that anticipated changes in interest rates or currency values will not be accurately predicted, which could significantly harm the fund’s performance, and the risk that regulatory developments could negatively affect the fund’s investments in such instruments.

Liquidity The fund may not be able to meet requests to redeem shares issued by the fund without significant dilution of the remaining shareholders’ interests in the fund. In addition, the fund may not be able to sell a holding in a timely manner at a desired price. Reduced liquidity in the bond markets can result from a number of events, such as limited trading activity, reductions in bond inventory, and rapid or unexpected changes in interest rates. Markets with lower overall liquidity could lead to greater price volatility and limit the fund’s ability to sell a holding at a suitable price.

Active management The fund’s overall investment program and holdings selected by the fund’s investment adviser may underperform the broad markets, relevant indices, or other funds with similar objectives and investment strategies.

Cybersecurity breaches The fund could be harmed by intentional cyberattacks and other cybersecurity breaches, including unauthorized access to the fund’s assets, customer data and confidential shareholder information, or other proprietary information. In addition, a cybersecurity breach could cause one of the fund’s service providers or financial intermediaries to suffer unauthorized data access, data corruption, or loss of operational functionality.
Risk Lose Money [Text] rr_RiskLoseMoney The fund’s share price fluctuates, which means you could lose money by investing in the fund.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading Performance
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock

The following performance information provides some indication of the risks of investing in the fund. The fund’s performance information represents only past performance (before and after taxes) and is not necessarily an indication of future results.

The following bar chart illustrates how much returns can differ from year to year by showing calendar year returns and the best and worst calendar quarter returns during those years for the fund.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The following performance information provides some indication of the risks of investing in the fund. The following bar chart illustrates how much returns can differ from year to year by showing calendar year returns and the best and worst calendar quarter returns during those years for the fund. The following table shows the average annual total returns for the fund, and also compares the returns with the returns of a relevant broad-based market index, as well as with the returns of one or more comparative indexes that have investment characteristics similar to those of the fund, if applicable.
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress troweprice.com
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture The fund’s performance information represents only past performance (before and after taxes) and is not necessarily an indication of future results.
Bar Chart [Heading] rr_BarChartHeading Calendar Year Returns
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock
         
  

Quarter Ended

Total Return

  

Quarter Ended

Total Return

 
 

Best Quarter

6/30/20

12.68%

 

Worst Quarter

3/31/20

-16.25%

 
Performance Table Heading rr_PerformanceTableHeading Average Annual Total Returns Periods ended December 31, 2021
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. After-tax returns shown are not relevant to investors who hold their fund shares through tax-deferred arrangements, such as a 401(k) account or an IRA.
Performance Table Narrative rr_PerformanceTableNarrativeTextBlock

The following table shows the average annual total returns for the fund, and also compares the returns with the returns of a relevant broad-based market index, as well as with the returns of one or more comparative indexes that have investment characteristics similar to those of the fund, if applicable.

In addition, the table shows hypothetical after-tax returns to demonstrate how taxes paid by a shareholder may influence returns. After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local

taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. After-tax returns shown are not relevant to investors who hold their fund shares through tax-deferred arrangements, such as a 401(k) account or an IRA.

Performance Table Closing [Text Block] rr_PerformanceTableClosingTextBlock

Updated performance information is available through troweprice.com.
T. Rowe Price Institutional Emerging Markets Bond Fund | J.P. Morgan Emerging Markets Bond Index Global Diversified  
Risk/Return: rr_RiskReturnAbstract  
Index No Deduction for Fees, Expenses, Taxes [Text] rr_IndexNoDeductionForFeesExpensesTaxes reflects no deduction for fees, expenses, or taxes
Label rr_AverageAnnualReturnLabel J.P. Morgan Emerging Markets Bond Index Global Diversified (reflects no deduction for fees, expenses, or taxes)
T. Rowe Price Institutional Emerging Markets Bond Fund | J.P. Morgan Emerging Markets Bond Index Global Diversified  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 (1.80%)
5 Years rr_AverageAnnualReturnYear05 4.65%
10 Years rr_AverageAnnualReturnYear10 5.28%
T. Rowe Price Institutional Emerging Markets Bond Fund | Institutional Emerging Markets Bond Fund  
Risk/Return: rr_RiskReturnAbstract  
Management fees rr_ManagementFeesOverAssets 0.70%
Other expenses rr_OtherExpensesOverAssets none
Total annual fund operating expenses rr_ExpensesOverAssets 0.70%
1 Year rr_ExpenseExampleYear01 $ 72
3 Years rr_ExpenseExampleYear03 224
5 Years rr_ExpenseExampleYear05 390
10 Years rr_ExpenseExampleYear10 $ 871
Annual Return 2012 rr_AnnualReturn2012 18.58%
Annual Return 2013 rr_AnnualReturn2013 (5.33%)
Annual Return 2014 rr_AnnualReturn2014 4.55%
Annual Return 2015 rr_AnnualReturn2015 1.52%
Annual Return 2016 rr_AnnualReturn2016 14.69%
Annual Return 2017 rr_AnnualReturn2017 9.33%
Annual Return 2018 rr_AnnualReturn2018 (5.61%)
Annual Return 2019 rr_AnnualReturn2019 12.68%
Annual Return 2020 rr_AnnualReturn2020 4.99%
Annual Return 2021 rr_AnnualReturn2021 (2.06%)
Label rr_HighestQuarterlyReturnLabel Best Quarter
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Jun. 30, 2020
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 12.68%
Label rr_LowestQuarterlyReturnLabel Worst Quarter
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Mar. 31, 2020
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (16.25%)
1 Year rr_AverageAnnualReturnYear01 (2.06%)
5 Years rr_AverageAnnualReturnYear05 3.64%
10 Years rr_AverageAnnualReturnYear10 5.03%
Inception Date rr_AverageAnnualReturnInceptionDate Nov. 30, 2006
T. Rowe Price Institutional Emerging Markets Bond Fund | Institutional Emerging Markets Bond Fund | After Taxes on Distributions  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 (3.85%)
5 Years rr_AverageAnnualReturnYear05 1.34%
10 Years rr_AverageAnnualReturnYear10 2.60%
T. Rowe Price Institutional Emerging Markets Bond Fund | Institutional Emerging Markets Bond Fund | After Taxes on Distributions and Sales  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 (1.21%)
5 Years rr_AverageAnnualReturnYear05 1.81%
10 Years rr_AverageAnnualReturnYear10 2.83%