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T. Rowe Price International Discovery Fund (Prospectus Summary) | T. Rowe Price International Discovery Fund  
Risk/Return: rr_RiskReturnAbstract  
Risk/Return [Heading] rr_RiskReturnHeading International Discovery Fund
Objective [Heading] rr_ObjectiveHeading Investment Objective(s)
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock

The fund seeks long-term growth of capital through investments primarily in the common stocks of rapidly growing, small- to medium-sized companies outside the U.S.
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 Investor Class or I Class, which are not reflected in the table.
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 [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 26.8% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 26.80%
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. The example also assumes that any current expense limitation arrangement remains in place for the period noted in the table above; therefore, the figures have been adjusted to reflect fee waivers or expense reimbursements only in the periods for which the expense limitation arrangement is expected to continue. 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 expects to primarily invest outside the U.S. and to diversify broadly across a variety of industries in developed and emerging market countries throughout the world. The fund will emphasize investing in small- to medium-sized companies. Depending on market conditions, the fund’s portfolio should be composed of investments in at least 10 countries and 100 different companies. Normally, at least 80% of the fund’s net assets (including any borrowings for investment purposes) will be invested in non-U.S. stocks. For purposes of determining whether the fund invests at least 80% of its net assets in non-U.S. stocks, the fund relies on the country assigned to a security by MSCI Inc. or another unaffiliated data provider.

While the adviser invests with an awareness of the global economic backdrop and the adviser’s outlook for certain industries, sectors, and individual countries, the adviser’s decision-making process focuses on bottom-up stock selection. Country allocation is driven largely by stock selection, though the adviser may limit investments in markets or industries that appear to have poor overall prospects.

Security selection reflects a growth style. The adviser relies on a global team of investment analysts dedicated to in-depth fundamental research in an effort to identify companies capable of achieving and sustaining above-average, long-term earnings growth. The adviser seeks to purchase stocks of companies at reasonable prices in relation to present or anticipated earnings, cash flow, or book value.

In selecting investments, the adviser generally favors companies with one or more of the following characteristics:

·   leading or improving market position;

·   attractive business niche;

·   attractive or improving franchise or industry position;

·   seasoned management;

·   stable or improving earnings and/or cash flow; and

·   sound or improving balance sheet.

The fund may sell securities for a variety of reasons, including to realize gains, limit losses, or redeploy assets into more promising opportunities.
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 during periods of market disruption or volatility, are summarized as follows:

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 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. 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.

Small- and mid-cap stocks Investments in securities issued by small-cap and mid-cap companies are likely to be more volatile than investments in securities issued by larger companies. Small and medium-sized companies often have less experienced management, narrower product lines, more limited financial resources, and less publicly available information than larger companies. In addition, smaller companies tend to be more sensitive to changes in overall economic conditions and their securities may have limited trading markets.

Growth investing The fund’s growth approach to investing could cause it to underperform other stock funds that employ a different investment style. Growth stocks tend to be more volatile than certain other types of stocks, and their prices may fluctuate more dramatically than the overall stock market. A stock with growth characteristics can have sharp price declines

due to decreases in current or expected earnings and may lack dividends that can help cushion its share price in a declining market.

Investing in Europe The European financial markets have been experiencing increased volatility due to concerns over rising government debt levels of several European countries, and these events may continue to significantly affect all of Europe. European economies could be significantly affected by, among other things, rising unemployment, the imposition or unexpected elimination of fiscal and monetary controls by member countries of the European Economic and Monetary Union, uncertainty surrounding the euro, the success of governmental actions to reduce budget deficits, and ongoing uncertainties surrounding Brexit, the formal withdrawal by the United Kingdom from the European Union.

Investing in Asia Many Asian economies have at various times been negatively affected by inflation, currency devaluations, an over-reliance on international trade and exports, political and social instability, and less developed financial systems and securities trading markets. Trade restrictions, unexpected decreases in exports, changes in government policies, or natural disasters could have a significant impact on companies doing business in Asia. The Asian region may be significantly affected by political unrest, military conflict, economic sanctions, and less demand for Asian products and services.

Investing in Japan The Japanese economy has at times been negatively affected by government intervention and protectionism, excessive regulation, an unstable financial services sector, a heavy reliance on international trade, and natural disasters. Some of these factors, as well as other adverse political developments, increases in government debt, and changes in fiscal, monetary, or trade policies, may affect the Japanese economy.

Investing in United Kingdom The risks of investing in the United Kingdom have been heightened as a result of Brexit, the formal steps taken by the United Kingdom to exit the European Union, which has resulted in increased volatility and triggered political, economic, and legal uncertainty. Uncertainty remains as to the consequences of Brexit and issuers in the United Kingdom may experience lower growth as a result.

Sector exposure At times, the fund may have a significant portion of its assets invested in securities of issuers conducting business in a broadly related group of industries within the same economic sector. Issuers in the same economic sector may be similarly affected by economic or market events, making the fund more vulnerable to unfavorable developments in that economic sector than funds that invest more broadly.

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.

Stock investing Stocks generally fluctuate in value more than bonds and may decline significantly over short time periods. There is a chance that stock prices overall will decline because stock markets tend to move in cycles, with periods of rising and falling prices. The value of stocks held by the fund may decline due to general weakness or volatility in the stock markets in which the fund invests or because of factors that affect a particular company or industry.

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’s Investor Class. Returns for other share classes vary since they have different expenses.
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’s Investor Class. Returns for other share classes vary since they have different expenses. The following table shows the average annual total returns for each class of the fund that has been in operation for at least one full calendar year, 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

31.43%

  

Worst Quarter

3/31/20

-20.99%

  
Performance Table Heading rr_PerformanceTableHeading Average Annual Total Returns Periods ended December 31, 2020
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 One Class of after Tax Shown [Text] rr_PerformanceTableOneClassOfAfterTaxShown After-tax returns are shown only for the Investor Class and will differ for other share classes.
Performance Table Narrative rr_PerformanceTableNarrativeTextBlock

The following table shows the average annual total returns for each class of the fund that has been in operation for at least one full calendar year, 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.After-tax returns are shown only for the Investor Class and will differ for other share classes.
Performance Table Closing [Text Block] rr_PerformanceTableClosingTextBlock Updated performance information is available through troweprice.com .
T. Rowe Price International Discovery Fund (Prospectus Summary) | T. Rowe Price International Discovery Fund | S&P Global ex-U.S. Small Cap Index Net  
Risk/Return: rr_RiskReturnAbstract  
Label rr_AverageAnnualReturnLabel S&P Global ex-U.S. Small Cap Index Net (reflects no deduction for fees or expenses)
T. Rowe Price International Discovery Fund (Prospectus Summary) | T. Rowe Price International Discovery Fund | S&P Global ex-U.S. Small Cap Index Net  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 14.09%
5 Years rr_AverageAnnualReturnYear05 9.30%
10 Years rr_AverageAnnualReturnYear10 6.26%
Since Inception rr_AverageAnnualReturnSinceInception 9.62% [1]
T. Rowe Price International Discovery Fund (Prospectus Summary) | T. Rowe Price International Discovery Fund | MSCI EAFE Small Cap Index  
Risk/Return: rr_RiskReturnAbstract  
Label rr_AverageAnnualReturnLabel MSCI EAFE Small Cap Index (reflects no deduction for fees, expenses, or taxes)
T. Rowe Price International Discovery Fund (Prospectus Summary) | T. Rowe Price International Discovery Fund | MSCI EAFE Small Cap Index  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 12.75%
5 Years rr_AverageAnnualReturnYear05 9.80%
10 Years rr_AverageAnnualReturnYear10 8.23%
Since Inception rr_AverageAnnualReturnSinceInception 10.12% [1]
T. Rowe Price International Discovery Fund (Prospectus Summary) | T. Rowe Price International Discovery Fund | Lipper International Small/Mid-Cap Growth Funds Average  
Risk/Return: rr_RiskReturnAbstract  
Label rr_AverageAnnualReturnLabel Lipper International Small/Mid-Cap Growth Funds Average
T. Rowe Price International Discovery Fund (Prospectus Summary) | T. Rowe Price International Discovery Fund | Lipper International Small/Mid-Cap Growth Funds Average  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 18.82%
5 Years rr_AverageAnnualReturnYear05 10.45%
10 Years rr_AverageAnnualReturnYear10 7.87%
Since Inception rr_AverageAnnualReturnSinceInception 10.45% [2]
T. Rowe Price International Discovery Fund (Prospectus Summary) | T. Rowe Price International Discovery Fund | Investor Class  
Risk/Return: rr_RiskReturnAbstract  
Maximum account fee rr_MaximumAccountFee $ 20 [3]
Management fees rr_ManagementFeesOverAssets 1.04%
Distribution and service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets none
Other expenses rr_OtherExpensesOverAssets 0.15%
Total annual fund operating expenses rr_ExpensesOverAssets 1.19%
Fee waiver/expense reimbursement rr_FeeWaiverOrReimbursementOverAssets none
Total annual fund operating expenses after fee waiver/expense reimbursement rr_NetExpensesOverAssets 1.19%
1 Year rr_ExpenseExampleYear01 $ 121
3 Years rr_ExpenseExampleYear03 378
5 Years rr_ExpenseExampleYear05 654
10 Years rr_ExpenseExampleYear10 $ 1,443
Annual Return 2011 rr_AnnualReturn2011 (14.08%)
Annual Return 2012 rr_AnnualReturn2012 26.00%
Annual Return 2013 rr_AnnualReturn2013 24.37%
Annual Return 2014 rr_AnnualReturn2014 (0.43%)
Annual Return 2015 rr_AnnualReturn2015 9.88%
Annual Return 2016 rr_AnnualReturn2016 0.95%
Annual Return 2017 rr_AnnualReturn2017 39.01%
Annual Return 2018 rr_AnnualReturn2018 (17.47%)
Annual Return 2019 rr_AnnualReturn2019 24.60%
Annual Return 2020 rr_AnnualReturn2020 38.73%
Label rr_HighestQuarterlyReturnLabel Best Quarter
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Jun. 30, 2020
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 31.43%
Label rr_LowestQuarterlyReturnLabel Worst Quarter
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Mar. 31, 2020
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (20.99%)
1 Year rr_AverageAnnualReturnYear01 38.73%
5 Years rr_AverageAnnualReturnYear05 14.89%
10 Years rr_AverageAnnualReturnYear10 11.42%
Since Inception rr_AverageAnnualReturnSinceInception none
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 30, 1988
T. Rowe Price International Discovery Fund (Prospectus Summary) | T. Rowe Price International Discovery Fund | Investor Class | After Taxes on Distributions  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 37.18%
5 Years rr_AverageAnnualReturnYear05 13.97%
10 Years rr_AverageAnnualReturnYear10 10.51%
Since Inception rr_AverageAnnualReturnSinceInception none
T. Rowe Price International Discovery Fund (Prospectus Summary) | T. Rowe Price International Discovery Fund | Investor Class | After Taxes on Distributions and Sales  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 23.73%
5 Years rr_AverageAnnualReturnYear05 11.78%
10 Years rr_AverageAnnualReturnYear10 9.19%
Since Inception rr_AverageAnnualReturnSinceInception none
T. Rowe Price International Discovery Fund (Prospectus Summary) | T. Rowe Price International Discovery Fund | I Class  
Risk/Return: rr_RiskReturnAbstract  
Maximum account fee rr_MaximumAccountFee none
Management fees rr_ManagementFeesOverAssets 1.04%
Distribution and service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets none
Other expenses rr_OtherExpensesOverAssets 0.02%
Total annual fund operating expenses rr_ExpensesOverAssets 1.06%
Fee waiver/expense reimbursement rr_FeeWaiverOrReimbursementOverAssets none
Total annual fund operating expenses after fee waiver/expense reimbursement rr_NetExpensesOverAssets 1.06%
1 Year rr_ExpenseExampleYear01 $ 108
3 Years rr_ExpenseExampleYear03 337
5 Years rr_ExpenseExampleYear05 585
10 Years rr_ExpenseExampleYear10 $ 1,294
1 Year rr_AverageAnnualReturnYear01 38.90%
5 Years rr_AverageAnnualReturnYear05 15.04%
10 Years rr_AverageAnnualReturnYear10 none
Since Inception rr_AverageAnnualReturnSinceInception 15.24%
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 17, 2015
T. Rowe Price International Discovery Fund (Prospectus Summary) | T. Rowe Price International Discovery Fund | Z Class  
Risk/Return: rr_RiskReturnAbstract  
Maximum account fee rr_MaximumAccountFee none
Management fees rr_ManagementFeesOverAssets 1.04%
Distribution and service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets none
Other expenses rr_OtherExpensesOverAssets 0.02%
Total annual fund operating expenses rr_ExpensesOverAssets 1.06%
Fee waiver/expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (1.06%) [4]
Total annual fund operating expenses after fee waiver/expense reimbursement rr_NetExpensesOverAssets none [4]
1 Year rr_ExpenseExampleYear01 none
3 Years rr_ExpenseExampleYear03 none
5 Years rr_ExpenseExampleYear05 none
10 Years rr_ExpenseExampleYear10 none
1 Year rr_AverageAnnualReturnYear01 none
5 Years rr_AverageAnnualReturnYear05 none
10 Years rr_AverageAnnualReturnYear10 none
Since Inception rr_AverageAnnualReturnSinceInception none
Inception Date rr_AverageAnnualReturnInceptionDate Feb. 22, 2021
[1] Return since 12/17/15.
[2] Return since 12/31/15.
[3] Subject to certain exceptions, accounts with a balance of less than $10,000 are charged an annual $20 fee.
[4] T. Rowe Price Associates, Inc., has contractually agreed to waive and/or bear all the Z Class’ expenses (excluding interest; expenses related to borrowings, taxes, and brokerage; nonrecurring, extraordinary expenses; and acquired fund fees and expenses) in their entirety. T. Rowe Price Associates, Inc. expects this fee waiver and/or expense reimbursement arrangement to remain in place indefinitely, and the agreement may only be amended or terminated with approval by the fund’s Board of Directors.