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Risk/Return: rr_RiskReturnAbstract  
Registrant Name dei_EntityRegistrantName DEUTSCHE INTERNATIONAL FUND, INC.
Prospectus Date rr_ProspectusDate Dec. 01, 2016
Deutsche CROCI International Fund  
Risk/Return: rr_RiskReturnAbstract  
Risk/Return [Heading] rr_RiskReturnHeading Deutsche CROCI® International Fund
Objective [Heading] rr_ObjectiveHeading

Investment Objective
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock

The fund seeks long-term growth of capital.

Expense [Heading] rr_ExpenseHeading

Fees and Expenses of the Fund
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock

These are the fees and expenses you may pay when you buy and hold shares. You may qualify for sales charge discounts if you and your immediate family invest, or agree to invest in the future, at least $50,000 in Deutsche funds. More information about these and other discounts is available from your financial professional and in Choosing a Share Class (p. 20) and Purchase and Redemption of Shares in the fund's SAI (p. II-16).
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption SHAREHOLDER FEES (paid directly from your investment)
Operating Expenses Caption [Text] rr_OperatingExpensesCaption ANNUAL FUND OPERATING EXPENSES
(expenses that you pay each year as a % 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 may indicate higher transaction costs and may mean higher taxes if you are investing in a taxable account. These costs are not reflected in annual fund operating expenses or in the expense example, and can affect the fund's performance.

Portfolio turnover rate for fiscal year 2016: 87%.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 87.00%
Expense Breakpoint Discounts [Text] rr_ExpenseBreakpointDiscounts You may qualify for sales charge discounts if you and your immediate family invest, or agree to invest in the future, at least $50,000 in Deutsche funds.
Expense Breakpoint, Minimum Investment Required [Amount] rr_ExpenseBreakpointMinimumInvestmentRequiredAmount $ 50,000
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. 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 costs would be:
Expense Example, No Redemption Narrative [Text Block] rr_ExpenseExampleNoRedemptionNarrativeTextBlock You would pay the following expenses if you did not redeem your shares:
Strategy [Heading] rr_StrategyHeading

Principal Investment Strategy
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock

Main investments. The fund invests at least 65% of its total assets in foreign equities (equities issued by foreign-based companies and listed on foreign exchanges). Although the fund can invest in companies of any size and from any country, it invests mainly in common stocks of established companies in countries with developed economies (other than the United States). The fund's equity investments may also include preferred stocks, depositary receipts and other securities with equity characteristics, such as convertible securities and warrants.

Management process. Portfolio management will select approximately 50 stocks of companies that it believes offer economic value utilizing the Cash Return on Capital Invested (CROCI®) strategy as the primary factor, in addition to other factors. Under the CROCI® strategy, economic value is measured using various metrics such as the CROCI® Economic Price Earnings Ratio (CROCI® Economic P/E Ratio). The CROCI® Economic P/E Ratio is a proprietary measure of company valuation using the same relationship between valuation and return as an accounting P/E ratio (i.e., price/book value divided by return on equity). The CROCI® Economic P/E Ratio and other CROCI® metrics may be adjusted from time to time. The CROCI® strategy may apply other measures of company valuation, as determined by the CROCI® Investment Strategy and Valuation Group. Portfolio management may use criteria other than the CROCI® strategy in selecting investments. At times, the number of stocks held in the fund may be higher or lower than 50 stocks at the discretion of portfolio management or as a result of corporate actions, mergers or other events. Portfolio management will select stocks primarily from a universe consisting of approximately 330 of the largest companies in developed markets outside North America represented in the CROCI® Investment Strategy and Valuation Group's database of companies evaluated using the CROCI® strategy, excluding certain stocks from sectors which are not under the CROCI® Investment Strategy and Valuation Group's coverage.

The fund is reviewed periodically and adjusted in accordance with the CROCI® strategy's rules, and the regional weighting in the fund is targeted to match the fund's benchmark. The region-neutral approach attempts to reduce the risk of significant regional over or underweights in the fund relative to the broader international equity market. The CROCI® strategy does not form opinions about relative attractiveness of different regions and targets region neutrality in order to seek to reduce currency risks relative to the fund's benchmark, as well keeping the focus of the strategy on stock selection, rather than regional allocation. During the selection process, certain portfolio selection buffers are applied in an attempt to reduce portfolio turnover. Portfolio management will take additional measures to attempt to reduce portfolio turnover, market impact and transaction costs in connection with implementation of the strategy, by applying liquidity and trading controls and managing the portfolio with tax efficiency in mind.

Portfolio management may utilize forward currency contracts to hedge against changes in value of the non−US currency exposure of the fund's investments. To maintain an approximate hedge against such changes, portfolio management expects to periodically reset the fund's forward currency contracts.

Derivatives. Portfolio management generally may use futures contracts, which are a type of derivative (a contract whose value is based on, for example, indices, currencies or securities) as a substitute for direct investment in a particular asset class or to keep cash on hand to meet shareholder redemptions. In addition, portfolio management generally may use forward currency contracts to hedge the fund's exposure to changes in foreign currency exchange rates on its foreign currency denominated portfolio holdings or to facilitate transactions in foreign currency denominated securities. Portfolio management generally may use structured notes to gain exposure to certain foreign markets that may not permit direct investment.

The fund may also use other types of derivatives (i) for hedging purposes; (ii) for risk management; (iii) for non-hedging purposes to seek to enhance potential gains; or (iv) as a substitute for direct investment in a particular asset class or to keep cash on hand to meet shareholder redemptions.

Securities Lending. The fund may lend securities (up to one-third of total assets) to approved institutions.

Risk [Heading] rr_RiskHeading

Main Risks
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock

There are several risk factors that could hurt the fund's performance, cause you to lose money or cause the fund's performance to trail that of other investments. The fund may not achieve its investment objective, and is not intended to be a complete investment program. An investment in the fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other governmental agency.

Foreign investment risk. The fund faces the risks inherent in foreign investing. Adverse political, economic or social developments could undermine the value of the fund's investments or prevent the fund from realizing the full value of its investments. In June 2016, citizens of the United Kingdom approved a referendum to leave the European Union (EU), creating economic and political uncertainty. Significant uncertainty exists regarding the timing of the United Kingdom's anticipated withdrawal from the EU and the effects such withdrawal may have on the United Kingdom, other EU countries and the global economy.

Financial reporting standards for companies based in foreign markets differ from those in the US. Additionally, foreign securities markets generally are smaller and less liquid than US markets. To the extent that the fund invests in non-US dollar denominated foreign securities, changes in currency exchange rates may affect the US dollar value of foreign securities or the income or gain received on these securities.

Stock market risk. When stock prices fall, you should expect the value of your investment to fall as well. Stock prices can be hurt by poor management on the part of the stock's issuer, shrinking product demand and other business risks. These may affect single companies as well as groups of companies. In addition, movements in financial markets may adversely affect a stock's price, regardless of how well the company performs. The market as a whole may not favor the types of investments the fund makes, which could affect the fund's ability to sell them at an attractive price. To the extent that the fund invests in a particular geographic region, capitalization or sector, the fund's performance may be affected by the general performance of that region, capitalization or sector.

CROCI® risk. The fund will be managed using the CROCI® Investment Process which is based on portfolio management's belief that, over time, stocks which display more favorable financial metrics (for example, the CROCI®Economic P/E Ratio) as generated by this process may outperform stocks which display less favorable metrics. This premise may not prove to be correct and prospective investors should evaluate this assumption prior to investing in the fund.

The calculation of financial metrics used by the fund (such as, among others, the CROCI® Economic P/E Ratio) are determined by the CROCI®Investment Strategy and Valuation Group using publicly available information. This publicly available information is adjusted based on assumptions made by the CROCI® Investment Strategy and Valuation Group that, subsequently, may prove not to have been correct. As financial metrics are calculated using historical information, there can be no guarantee of the future performance of the CROCI® strategy.

Currency risk. Changes in currency exchange rates may affect the value of the fund's investment and the fund's share price. To the extent the fund's forward currency contracts are not successful in hedging against such changes, the fund's US dollar share price may go down if the value of the local currency of the non−US markets in which the fund invests depreciates against the US dollar. This is true even if the local currency value of securities in the fund's holdings goes up. Furthermore, the fund's use of forward currency contracts may eliminate some or all of the benefit of an increase in the value of a foreign currency versus the US dollar. The value of the US dollar measured against other currencies is influenced by a variety of factors. These factors include: interest rates, national debt levels and trade deficits, changes in balances of payments and trade, domestic and foreign interest and inflation rates, global or regional political, economic or financial events, monetary policies of governments, actual or potential government intervention, global energy prices, political instability and government monetary policies and the buying or selling of currency by a country's government.

In order to minimize transaction costs or for other reasons, the fund's exposure to non−US currencies of the fund's investments may not be fully hedged at all times. Currency exchange rates can be very volatile and can change quickly and unpredictably. Therefore, the value of an investment in the fund may also go up or down quickly and unpredictably.

Security selection risk. The securities in the fund's portfolio may decline in value. Portfolio management could be wrong in its analysis of industries, companies, economic trends, the relative attractiveness of different securities or other matters.

Liquidity risk. In certain situations, it may be difficult or impossible to sell an investment and/or the fund may sell certain investments at a price or time that is not advantageous in order to meet redemption requests or other cash needs. Unusual market conditions, such as an unusually high volume of redemptions or other similar conditions could increase liquidity risk for the fund.

Pricing risk. If market conditions make it difficult to value some investments, the fund may value these investments using more subjective methods, such as fair value pricing. In such cases, the value determined for an investment could be different from the value realized upon such investment's sale. As a result, you could pay more than the market value when buying fund shares or receive less than the market value when selling fund shares.

Derivatives risk. Risks associated with derivatives may include the risk that the derivative is not well correlated with the security, index or currency to which it relates; the risk that derivatives may result in losses or missed opportunities; the risk that the fund will be unable to sell the derivative because of an illiquid secondary market; the risk that a counterparty is unwilling or unable to meet its obligation; and the risk that the derivative transaction could expose the fund to the effects of leverage, which could increase the fund's exposure to the market and magnify potential losses.

Counterparty risk. A financial institution or other counterparty with whom the fund does business, or that underwrites, distributes or guarantees any investments or contracts that the fund owns or is otherwise exposed to, may decline in financial health and become unable to honor its commitments. This could cause losses for the fund or could delay the return or delivery of collateral or other assets to the fund.

Securities lending risk. Any decline in the value of a portfolio security that occurs while the security is out on loan is borne by the fund and will adversely affect performance. Also, there may be delays in recovery of securities loaned or even a loss of rights in the collateral should the borrower of the securities fail financially while holding the security.

Operational and technology risk. Cyber-attacks, disruptions, or failures that affect the fund's service providers or counterparties, issuers of securities held by the fund, or other market participants may adversely affect the fund and its shareholders, including by causing losses for the fund or impairing fund operations.
Risk Lose Money [Text] rr_RiskLoseMoney There are several risk factors that could hurt the fund's performance, cause you to lose money or cause the fund's performance to trail that of other investments.
Risk Not Insured Depository Institution [Text] rr_RiskNotInsuredDepositoryInstitution An investment in the fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other governmental agency.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading

Past Performance
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock

How a fund's returns vary from year to year can give an idea of its risk; so can comparing fund performance to overall market performance (as measured by an appropriate market index). Past performance may not indicate future results. All performance figures below assume that dividends and distributions were reinvested. For more recent performance figures, go to deutschefunds.com (the Web site does not form a part of this prospectus) or call the phone number included in this prospectus.

Prior to February 28, 2014, the fund had a different investment management team that operated with a different investment strategy. Performance would have been different if the investment strategy described above had been in effect.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns How a fund's returns vary from year to year can give an idea of its risk; so can comparing fund performance to overall market performance (as measured by an appropriate market index).
Performance Additional Market Index [Text] rr_PerformanceAdditionalMarketIndex The Advisor believes that the MSCI EAFE Index generally reflects the expected regional allocations of the fund's overall investments. The Advisor believes the additional MSCI EAFE US Dollar Hedged Index generally reflects the fund's expected regional allocations without the currency impact.
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress deutschefunds.com
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Past performance may not indicate future results.
Bar Chart [Heading] rr_BarChartHeading CALENDAR YEAR TOTAL RETURNS (%) (Class A)
Bar Chart Narrative [Text Block] rr_BarChartNarrativeTextBlock These year-by-year returns do not include sales charges, if any, and would be lower if they did. Returns for other classes were different and are not shown here.
Bar Chart Does Not Reflect Sales Loads [Text] rr_BarChartDoesNotReflectSalesLoads These year-by-year returns do not include sales charges, if any, and would be lower if they did.
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock
Returns Period ending
Best Quarter 22.81% September 30, 2009
Worst Quarter -26.78% September 30, 2008
Year-to-Date -2.91% September 30, 2016

Performance Table Heading rr_PerformanceTableHeading Average Annual Total Returns
(For periods ended 12/31/2015 expressed as a %)
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate After-tax returns (which are shown only for Class A and would be different for other classes) reflect the historical highest individual federal income tax rates, but do not reflect any state or local taxes.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred After-tax returns are not relevant to shares held in an IRA, 401(k) or other tax-advantaged investment plan.
Performance Table One Class of after Tax Shown [Text] rr_PerformanceTableOneClassOfAfterTaxShown After-tax returns (which are shown only for Class A and would be different for other classes)
Performance Table Narrative rr_PerformanceTableNarrativeTextBlock After-tax returns (which are shown only for Class A and would be different for other classes) reflect the historical highest individual federal income tax rates, but do not reflect any state or local taxes. Your actual after-tax returns may be different. After-tax returns are not relevant to shares held in an IRA, 401(k) or other tax-advantaged investment plan.
Performance Table Closing [Text Block] rr_PerformanceTableClosingTextBlock The Advisor believes that the MSCI EAFE Index generally reflects the expected regional allocations of the fund's overall investments. The Advisor believes the additional MSCI EAFE US Dollar Hedged Index generally reflects the fund's expected regional allocations without the currency impact.
Deutsche CROCI International Fund | Class A  
Risk/Return: rr_RiskReturnAbstract  
Maximum sales charge (load) imposed on purchases, as % of offering price rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 5.75%
Maximum deferred sales charge (load), as % of redemption proceeds rr_MaximumDeferredSalesChargeOverOther none
Redemption/exchange fee on shares owned less than 15 days, as % of redemption proceeds rr_RedemptionFeeOverRedemption 2.00%
Account Maintenance Fee (annually, for fund account balances below $10,000 and subject to certain exceptions) rr_MaximumAccountFee $ 20
Management fee rr_ManagementFeesOverAssets 0.57%
Distribution/service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets 0.24%
Other expenses rr_OtherExpensesOverAssets 0.33%
Total annual fund operating expenses rr_ExpensesOverAssets 1.14%
1 Year rr_ExpenseExampleYear01 $ 685
3 Years rr_ExpenseExampleYear03 916
5 Years rr_ExpenseExampleYear05 1,167
10 Years rr_ExpenseExampleYear10 1,881
1 Year rr_ExpenseExampleNoRedemptionYear01 685
3 Years rr_ExpenseExampleNoRedemptionYear03 916
5 Years rr_ExpenseExampleNoRedemptionYear05 1,167
10 Years rr_ExpenseExampleNoRedemptionYear10 $ 1,881
2006 rr_AnnualReturn2006 25.76%
2007 rr_AnnualReturn2007 14.25%
2008 rr_AnnualReturn2008 (48.28%)
2009 rr_AnnualReturn2009 32.66%
2010 rr_AnnualReturn2010 2.21%
2011 rr_AnnualReturn2011 (16.71%)
2012 rr_AnnualReturn2012 20.39%
2013 rr_AnnualReturn2013 20.13%
2014 rr_AnnualReturn2014 (0.11%)
2015 rr_AnnualReturn2015 (5.24%)
Year to Date Return, Label rr_YearToDateReturnLabel Year-to-Date
Bar Chart, Year to Date Return, Date rr_BarChartYearToDateReturnDate Sep. 30, 2016
Bar Chart, Year to Date Return rr_BarChartYearToDateReturn (2.91%)
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best Quarter
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Sep. 30, 2009
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 22.81%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst Quarter
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Sep. 30, 2008
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (26.78%)
Deutsche CROCI International Fund | Class C  
Risk/Return: rr_RiskReturnAbstract  
Maximum sales charge (load) imposed on purchases, as % of offering price rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum deferred sales charge (load), as % of redemption proceeds rr_MaximumDeferredSalesChargeOverOther 1.00%
Redemption/exchange fee on shares owned less than 15 days, as % of redemption proceeds rr_RedemptionFeeOverRedemption 2.00%
Account Maintenance Fee (annually, for fund account balances below $10,000 and subject to certain exceptions) rr_MaximumAccountFee $ 20
Management fee rr_ManagementFeesOverAssets 0.57%
Distribution/service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets 1.00%
Other expenses rr_OtherExpensesOverAssets 0.32%
Total annual fund operating expenses rr_ExpensesOverAssets 1.89%
1 Year rr_ExpenseExampleYear01 $ 292
3 Years rr_ExpenseExampleYear03 594
5 Years rr_ExpenseExampleYear05 1,021
10 Years rr_ExpenseExampleYear10 2,212
1 Year rr_ExpenseExampleNoRedemptionYear01 192
3 Years rr_ExpenseExampleNoRedemptionYear03 594
5 Years rr_ExpenseExampleNoRedemptionYear05 1,021
10 Years rr_ExpenseExampleNoRedemptionYear10 $ 2,212
Deutsche CROCI International Fund | Class R6  
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 redemption proceeds rr_MaximumDeferredSalesChargeOverOther none
Redemption/exchange fee on shares owned less than 15 days, as % of redemption proceeds rr_RedemptionFeeOverRedemption 2.00%
Account Maintenance Fee (annually, for fund account balances below $10,000 and subject to certain exceptions) rr_MaximumAccountFee none
Management fee rr_ManagementFeesOverAssets 0.57%
Distribution/service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets none
Other expenses rr_OtherExpensesOverAssets 0.18%
Total annual fund operating expenses rr_ExpensesOverAssets 0.75%
1 Year rr_ExpenseExampleYear01 $ 77
3 Years rr_ExpenseExampleYear03 240
5 Years rr_ExpenseExampleYear05 417
10 Years rr_ExpenseExampleYear10 930
1 Year rr_ExpenseExampleNoRedemptionYear01 77
3 Years rr_ExpenseExampleNoRedemptionYear03 240
5 Years rr_ExpenseExampleNoRedemptionYear05 417
10 Years rr_ExpenseExampleNoRedemptionYear10 $ 930
Deutsche CROCI International Fund | INST Class  
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 redemption proceeds rr_MaximumDeferredSalesChargeOverOther none
Redemption/exchange fee on shares owned less than 15 days, as % of redemption proceeds rr_RedemptionFeeOverRedemption 2.00%
Account Maintenance Fee (annually, for fund account balances below $10,000 and subject to certain exceptions) rr_MaximumAccountFee none
Management fee rr_ManagementFeesOverAssets 0.57%
Distribution/service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets none
Other expenses rr_OtherExpensesOverAssets 0.26%
Total annual fund operating expenses rr_ExpensesOverAssets 0.83%
1 Year rr_ExpenseExampleYear01 $ 85
3 Years rr_ExpenseExampleYear03 265
5 Years rr_ExpenseExampleYear05 460
10 Years rr_ExpenseExampleYear10 1,025
1 Year rr_ExpenseExampleNoRedemptionYear01 85
3 Years rr_ExpenseExampleNoRedemptionYear03 265
5 Years rr_ExpenseExampleNoRedemptionYear05 460
10 Years rr_ExpenseExampleNoRedemptionYear10 $ 1,025
Deutsche CROCI International Fund | Class S  
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 redemption proceeds rr_MaximumDeferredSalesChargeOverOther none
Redemption/exchange fee on shares owned less than 15 days, as % of redemption proceeds rr_RedemptionFeeOverRedemption 2.00%
Account Maintenance Fee (annually, for fund account balances below $10,000 and subject to certain exceptions) rr_MaximumAccountFee $ 20
Management fee rr_ManagementFeesOverAssets 0.57%
Distribution/service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets none
Other expenses rr_OtherExpensesOverAssets 0.35%
Total annual fund operating expenses rr_ExpensesOverAssets 0.92%
1 Year rr_ExpenseExampleYear01 $ 94
3 Years rr_ExpenseExampleYear03 293
5 Years rr_ExpenseExampleYear05 509
10 Years rr_ExpenseExampleYear10 1,131
1 Year rr_ExpenseExampleNoRedemptionYear01 94
3 Years rr_ExpenseExampleNoRedemptionYear03 293
5 Years rr_ExpenseExampleNoRedemptionYear05 509
10 Years rr_ExpenseExampleNoRedemptionYear10 $ 1,131
Deutsche CROCI International Fund | before tax | Class A  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 (10.69%)
5 Years rr_AverageAnnualReturnYear05 1.45%
10 Years rr_AverageAnnualReturnYear10 0.80%
Class Inception rr_AverageAnnualReturnInceptionDate Aug. 02, 1999
Deutsche CROCI International Fund | before tax | Class C  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 (5.94%)
5 Years rr_AverageAnnualReturnYear05 1.87%
10 Years rr_AverageAnnualReturnYear10 0.62%
Class Inception rr_AverageAnnualReturnInceptionDate Dec. 29, 2000
Deutsche CROCI International Fund | before tax | Class R6  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 (5.05%)
Since Inception rr_AverageAnnualReturnSinceInception (5.82%)
Class Inception rr_AverageAnnualReturnInceptionDate Dec. 01, 2014
Deutsche CROCI International Fund | before tax | INST Class  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 (5.02%)
5 Years rr_AverageAnnualReturnYear05 3.05%
10 Years rr_AverageAnnualReturnYear10 1.81%
Class Inception rr_AverageAnnualReturnInceptionDate Dec. 29, 2000
Deutsche CROCI International Fund | before tax | Class S  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 (5.07%)
5 Years rr_AverageAnnualReturnYear05 2.94%
10 Years rr_AverageAnnualReturnYear10 1.70%
Class Inception rr_AverageAnnualReturnInceptionDate Jun. 18, 1953
Deutsche CROCI International Fund | After tax on distributions | Class A  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 (11.51%)
5 Years rr_AverageAnnualReturnYear05 0.28%
10 Years rr_AverageAnnualReturnYear10 0.09%
Deutsche CROCI International Fund | After tax on distributions and sale of fund shares | Class A  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 (5.60%)
5 Years rr_AverageAnnualReturnYear05 0.93%
10 Years rr_AverageAnnualReturnYear10 0.64%
Deutsche CROCI International Fund | Morgan Stanley Capital International (MSCI) Europe, Australasia, Far East (EAFE) Index (reflects no deduction for fees or expenses) | Class R6  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 (0.81%)
Since Inception rr_AverageAnnualReturnSinceInception (3.93%)
Deutsche CROCI International Fund | Morgan Stanley Capital International (MSCI) Europe, Australasia, Far East (EAFE) Index (reflects no deduction for fees or expenses) | Class S  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 (0.81%)
5 Years rr_AverageAnnualReturnYear05 3.60%
10 Years rr_AverageAnnualReturnYear10 3.03%
Deutsche CROCI International Fund | MSCI EAFE US Dollar Hedged Index (reflects no deduction for fees or expenses) | Class R6  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 5.02%
Since Inception rr_AverageAnnualReturnSinceInception 3.69%
Deutsche CROCI International Fund | MSCI EAFE US Dollar Hedged Index (reflects no deduction for fees or expenses) | Class S  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 5.02%
5 Years rr_AverageAnnualReturnYear05 7.75%
10 Years rr_AverageAnnualReturnYear10 3.81%