Label	Element	Value
Prospectus:	rr_ProspectusTable
Document Type	dei_DocumentType	497
Document Period End Date	dei_DocumentPeriodEndDate	May 16, 2016
Entity Registrant Name	dei_EntityRegistrantName	Global X Funds
Central Index Key	dei_EntityCentralIndexKey	0001432353
Amendment Flag	dei_AmendmentFlag	false
Document Creation Date	dei_DocumentCreationDate	May 10, 2016
Document Effective Date	dei_DocumentEffectiveDate	May 04, 2016
Prospectus Date	rr_ProspectusDate	May 04, 2016
Global X Health & Wellness Thematic ETF (Prospectus) \| Global X Health & Wellness Thematic ETF
Prospectus:	rr_ProspectusTable
Risk/Return [Heading]	rr_RiskReturnHeading	Global X Health & Wellness Thematic ETF
Objective [Heading]	rr_ObjectiveHeading	INVESTMENT OBJECTIVE
Objective, Primary [Text Block]	rr_ObjectivePrimaryTextBlock	The Global X Health & Wellness Thematic ETF (“Fund”) seeks investment results that correspond generally to the price and yield performance, before fees and expenses, of the INDXX Global Health & Wellness Index (“Underlying Index”).
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 and hold shares (“Shares”) of the Fund. You will also incur usual and customary brokerage commissions when buying and selling Shares.
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 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.
Expense Exchange Traded Fund Commissions [Text]	rr_ExpenseExchangeTradedFundCommissions	You will also incur usual and customary brokerage commissions when buying and selling Shares.
Expense Example [Heading]	rr_ExpenseExampleHeading	Example:
Expense Example Narrative [Text Block]	rr_ExpenseExampleNarrativeTextBlock	The following example is intended to help you compare the cost of investing in the Fund with the cost of investing in other funds. This example does not take into account customary brokerage commissions that you pay when purchasing or selling Shares of the Fund in the secondary market.
Expense Example by, Year, Caption [Text]	rr_ExpenseExampleByYearCaption	The example assumes that you invest $10,000 in the Fund for the time periods indicated and then sell 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:
Strategy [Heading]	rr_StrategyHeading	PRINCIPAL INVESTMENT STRATEGIES
Strategy Narrative [Text Block]	rr_StrategyNarrativeTextBlock	The Fund invests more than 80% of its total assets in the securities of the Underlying Index and in American Depositary Receipts ("ADRs") and Global Depositary Receipts ("GDRs") based on the securities in the Underlying Index. The Fund’s 80% investment policy is non-fundamental and requires 60 days’ prior written notice to shareholders before it can be changed. The Fund may lend securities representing up to one-third of the value of the Fund’s total assets (including the value of the collateral received). The Underlying Index is designed to provide exposure to exchange-listed companies in developed markets that provide products and services that facilitate physical wellness through active and healthy lifestyles, including but not limited to companies involved in fitness equipment, fitness technology, athletic apparel, nutritional supplements, and organic/natural food offerings, (collectively, “Health & Wellness Companies”), as defined by INDXX, the provider of the Underlying Index ("Index Provider"). The eligible universe of the Underlying Index includes the most liquid and investable companies in accordance with the standard market capitalization and liquidity criteria associated with developed markets, as defined by the Index Provider. As of April 15, 2016, companies must have a minimum market capitalization of $500 million and a minimum average daily turnover for the last 6 months greater than or equal to $2 million in order to be eligible for inclusion in the Underlying Index. The Underlying Index may include components from the following countries: Australia, Austria, Belgium, Canada, Denmark, Finland, France, Germany, Hong Kong, Ireland, Israel, Italy, Japan, Netherlands, New Zealand, Norway, Portugal, Singapore, Spain, Sweden, Switzerland, South Korea, the United Kingdom and the United States. From the eligible universe, the Index Provider identifies Health & Wellness Companies by applying a proprietary analysis that consists of two primary components: theme identification and company analysis. As of April 15, 2016, the Index Provider has identified the following five themes that are expected to provide the most exposure to Health & Wellness Companies: (1) Healthy Food, Nutrition and Weight Loss, (2) Fitness and Fitness Apparel, (3) Nutritional Supplements and Preventive Health Care, (4) Anti-Aging and (5) Wellness (collectively, “Health & Wellness Themes”). In order to be included in the Underlying Index, a company must be identified as having significant exposure to one of these Health & Wellness Themes. The Index Provider analyzes companies based on two primary criteria: revenue exposure and primary business operations. A company is to have significant exposure to one of the Health & Wellness Themes if (i), according to a public filing, it generates a majority of its revenue from the sale of products or services from one of the Health & Wellness Themes, (ii), in the absence of a revenue segment breakdown, it has stated its primary business to be in products and services focused on one of the Health & Wellness Themes. Accordingly, the Fund assets will be concentrated (that is, it will hold 25% or more of its total assets) in companies that provide products and services that facilitate physical health and wellness. The Underlying Index is weighted according to a modified capitalization weighting methodology and is reconstituted and rebalanced annually. The Underlying Index may include large-, mid- or small-capitalization companies, and components primarily include consumer discretionary, consumer staples, health care and information technology companies. The Fund's investment objective and Underlying Index may be changed without shareholder approval. The Underlying Index is sponsored by the Index Provider, which is an organization that is independent of the Fund and Global X Management Company LLC, the investment adviser for the Fund (“Adviser”). The Index Provider determines the relative weightings of the securities in the Underlying Index and publishes information regarding the market value of the Underlying Index. The Adviser uses a “passive” or indexing approach to try to achieve the Fund’s investment objective. Unlike many investment companies, the Fund does not try to outperform the Underlying Index and does not seek temporary defensive positions when markets decline or appear overvalued. The Fund generally will use a replication strategy. A replication strategy is an indexing strategy that involves investing in the securities of the Underlying Index in approximately the same proportions as in the Underlying Index. However, the Fund may utilize a representative sampling strategy with respect to the Underlying Index when a replication strategy might be detrimental or disadvantageous to shareholders, such as when there are practical difficulties or substantial costs involved in compiling a portfolio of equity securities to replicate the Underlying Index, in instances in which a security in the Underlying Index becomes temporarily illiquid, unavailable or less liquid, or as a result of legal restrictions or limitations (such as tax diversification requirements) that apply to the Fund but not the Underlying Index. The Adviser expects that, over time, the correlation between the Fund’s performance and that of the Underlying Index, before fees and expenses, will exceed 95%. A correlation percentage of 100% would indicate perfect correlation. If the Fund uses a replication strategy, it can be expected to have greater correlation to the Underlying Index than if it uses a representative sampling strategy. The Fund concentrates its investments (i.e., holds 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. As of April 15, 2016, the Underlying Index was concentrated in the Consumer Discretionary Sector and the Consumer Staples Sector.
Strategy Portfolio Concentration [Text]	rr_StrategyPortfolioConcentration	The Fund concentrates its investments (i.e., holds 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated.
Risk [Heading]	rr_RiskHeading	SUMMARY OF PRINCIPAL RISKS
Risk Narrative [Text Block]	rr_RiskNarrativeTextBlock	As with any investment, you could lose all or part of your investment in the Fund, and the Fund's performance could trail that of other investments. There is no guarantee that the Fund will achieve its investment objective. The Fund is subject to the principal risks noted below, any of which may adversely affect the Fund's net asset value ("NAV"), trading price, yield, total return and ability to meet its investment objective, as well as other risks that are described in greater detail in the Additional Information About the Funds’ Strategies and Risks section of the Prospectus and in the Statement of Additional Information ("SAI"). ADR/GDR Risk: To the extent the Fund seeks exposure to foreign companies, the Fund’s investments may be in the form of depositary receipts or other securities convertible into securities of foreign issuers, including ADRs and GDRs. While the use of ADRs and GDRs, which are traded on exchanges and represent an ownership in a foreign security, provide an alternative to directly purchasing the underlying foreign securities in their respective national markets and currencies, investments in ADRs and GDRs continue to be subject to certain of the risks associated with investing directly in foreign securities. Asset Class Risk: Securities in the Underlying Index or the Fund's portfolio may underperform in comparison to the general securities markets or other asset classes. Authorized Participants Concentration Risk: The Fund has a limited number of financial institutions that may act as Authorized Participants (“APs”). Only APs who have entered into agreements with the Fund’s distributor may engage in creation or redemption transactions directly with the Fund. To the extent that those APs exit the business or are unable to process creation and/or redemption orders, and no other AP is able to step forward to create or redeem in either of those cases, Shares may trade like closed-end fund shares at a discount to NAV and possibly face trading halts and/or delisting from NASDAQ (the "Exchange"). Concentration Risk: To the extent that the Underlying Index concentrates in the securities of issuers in a particular country, industry, market, asset class, or sector, the Fund will also concentrate its investments to approximately the same extent. By concentrating its investments in a country, industry, market, asset class, or sector, the Fund faces more risks than if it were diversified broadly over numerous countries, industries, markets, asset classes, or sectors. Such risks, any of which may adversely affect the companies in which the Fund invests, may include, but are not limited to, the following: general economic conditions or cyclical market patterns that could negatively affect supply and demand; competition for resources, adverse labor relations, political or world events; obsolescence of technologies; and increased competition or new product introductions that may affect the profitability or viability of companies in a particular country, industry, market, asset class, or sector. In addition, at times, such country, industry, market, asset class, or sector may be out of favor and underperform other similar categories or the market as a whole. For additional details on these risks, please see Risks Related to Investing in the Consumer Discretionary Sector, Risks Related to Investing in the Consumer Staples Sector, Risks Related to Investing in Hong Kong, Risks Related to Investing in Japan, Risks Related to Investing in Taiwan and Risks Related to Investing in Health & Wellness Companies. Currency Risk: Because the Fund's NAV is determined in U.S. dollars, the Fund's NAV could decline if currencies of the underlying securities depreciate against the U.S. dollar. Cyber Security Risk: Failures or breaches of the electronic systems of the Fund, the Fund's adviser, and the Fund's other service providers, market makers, Authorized Participants or the issuers of securities in which the Fund invests have the ability to cause disruptions and negatively impact the Fund's business operations, potentially resulting in financial losses to the Fund and its shareholders. While the Fund has established business continuity plans and risk management systems seeking to address system breaches or failures, there are inherit limitations in such plans and systems. Furthermore, the Fund cannot control the cyber security plans and systems of the Fund's service providers, market makers, Authorized Participants or issuers of securities in which the Fund invests. Equity Securities Risk: Equity securities are subject to changes in value and their values may be more volatile than other asset classes, as a result of such factors as a company’s business performance, investor perceptions, stock market trends and general economic conditions. Foreign Security Risk: Investments in the securities of foreign issuers (including investments in ADRs and GDRs) are subject to the risks associated with investing in those foreign markets, such as heightened risks of inflation or nationalization. In addition, securities of foreign issuers may lose value due to political, economic and geographic events affecting a foreign issuer or market. During periods of social, political or economic instability in a country or region, the value of a foreign security traded on U.S. exchanges, nonetheless, could be affected by, among other things, increasing price volatility, illiquidity, or the closure of the primary market on which the security (or the security underlying the ADR or GDR) is traded. You may lose money due to political, economic and geographic events affecting a foreign issuer or market. Geographic Risk: A natural disaster could occur in a geographic region in which the Fund invests, which could affect the economy or particular business operations of companies in the specific geographic region, causing an adverse impact on the Fund’s investments in the affected region. Investable Universe of Companies Risk: The investable universe of companies in which the Fund may invest may be limited. If a company no longer meets the Index Provider’s criteria for inclusion in the Underlying Index, the Fund may need to reduce or eliminate its holdings in that company. The reduction or elimination of the Fund’s holdings in the company may have an adverse impact on the liquidity of the Fund’s underlying portfolio holdings and on Fund performance. Issuer Risk: Fund performance depends on the performance of individual companies in which the Fund invests. Changes to the financial condition of any of those companies may cause the value of their securities to decline. Market Risk: The Fund's NAV could decline over short periods due to short-term market movements and over longer periods during market downturns. Market Trading Risk: The Fund faces numerous market trading risks, including the potential lack of an active market for Shares, losses from trading in secondary markets, and disruption in the creation/redemption process of the Fund. Any of these factors may lead to the Shares trading at a premium or discount to NAV. Non-Diversification Risk: The Fund is classified as a “non-diversified” investment company under the 1940 Act. As a result, the Fund is subject to the risk that it will be more volatile than a diversified fund because the Fund may invest its assets in a smaller number of issuers or may invest a larger proportion of its assets in a single issuer. As a result, the gains and losses on a single investment may have a greater impact on the Fund’s NAV and may make the Fund more volatile than more diversified funds. Passive Investment Risk: The Fund is not actively managed and the Adviser does not attempt to take defensive positions in declining markets. Unlike many investment companies, the Fund does not utilize an investing strategy that seeks returns in excess of its Underlying Index. Therefore, it would not necessarily buy or sell a security unless that security is added or removed, respectively, from the Underlying Index, even if that security generally is underperforming. Risks Related to Investing in the Consumer Discretionary Sector: The consumer discretionary sector may be affected by changes in domestic and international economies, exchange and interest rates, competition, consumers’ disposable income and consumer preferences, social trends and marketing campaigns. Risks Related to Investing in the Consumer Staples Sector: The consumer staples sector may be affected by marketing campaigns, changes in consumer demands, government regulations and changes in commodity prices. Risks Related to Investing in Health & Wellness Companies: The Fund invests in health and wellness companies, including companies that operate gyms and fitness/wellness facilities as well as companies that provide, manufacture or distribute natural/organic foods, sports/fitness equipment, wearable fitness technology, fitness/athletic apparel, nutritional supplements, anti-aging products and dietary services. The risks related to investing in such companies include rapid changes in consumer trends, social trends, marketing campaigns, and consumers’ disposable income. In addition, these companies typically face intense competition domestically and abroad, which could adversely impact the success of these companies. Risks Related to Investing in Hong Kong: Investments in Hong Kong issuers may subject the Fund to legal, regulatory, political, currency, security, and economic risk specific to Hong Kong. China is Hong Kong’s largest trading partner, both in terms of exports and imports. Any changes in the Chinese economy, trade regulations or currency exchange rates, or a tightening of China’s control over Hong Kong, may have an adverse impact on Hong Kong’s economy. Risks Related to Investing in Japan: The Japanese economy may be subject to considerable degrees of economic, political and social instability, which could have a negative impact on Japanese securities. Since the year 2000, Japan’s economic growth rate has remained relatively low, and it may remain low in the future. In addition, Japan is subject to the risk of natural disasters, such as earthquakes, volcanic eruptions, typhoons and tsunamis, which could negatively affect the Fund. Risks Related to Investing in Taiwan: Investments in Taiwanese issuers involve risks that are specific to Taiwan, including legal, regulatory, political and economic risks. In addition, Taiwan is subject to the risk of natural disasters, such as typhoons and tsunamis, which could negatively affect the Fund. Securities Lending Risk: Securities lending involves a risk of loss because the borrower may fail to return the securities in a timely manner or at all. If the Fund is not able to recover the securities loaned, it may sell the collateral and purchase a replacement security in the market. Lending securities entails a risk of loss to the Fund if and to the extent that the market value of the loaned securities increases and the collateral is not increased accordingly. Additionally, the Fund will bear any loss on the investment of cash collateral it receives. These events could also trigger adverse tax consequences for the Fund. As securities on loan may not be voted by the Fund, there is a risk that the Fund may not be able to recall the securities in sufficient time to vote on material proxy matters. Small- and Mid-Capitalization Companies Risk: Small- and mid-capitalization companies often have greater price volatility, lower trading volume and less liquidity than larger more established companies. In addition, these companies are often subject to less analyst coverage and may be in early and less predictable periods of their corporate existences. These companies tend to have smaller revenues, narrower product lines, less management depth and experience, smaller shares of their product or service markets, fewer financial resources and less competitive strength than larger companies. Tracking Error Risk: The Fund’s return may not match the return of the Underlying Index for a number of reasons. For example, the Fund incurs operating expenses not applicable to the Underlying Index, and incurs costs in buying and selling securities, especially when rebalancing the Fund’s securities holdings to reflect changes in the composition of the Underlying Index. In addition, the performance of the Fund and the Underlying Index may vary due to asset valuation differences and differences between the Fund’s portfolio and the Underlying Index resulting from legal restrictions, costs or liquidity constraints. Trading Halt Risk: An exchange or market may close or issue trading halts on specific securities, or the ability to buy or sell certain securities or financial instruments may be restricted, which may result in the Fund being unable to buy or sell certain securities or financial instruments. In such circumstances, the Fund may be unable to rebalance its portfolio, may be unable to accurately price its investments and/or may incur substantial trading losses. Valuation Risk: The sales price the Fund could receive for a security may differ from the Fund’s valuation of the security and may differ from the value used by the Underlying Index, particularly for securities that trade in low value or volatile markets or that are valued using a fair value methodology. The value of the securities in the Fund's portfolio may change on days when shareholders will not be able to purchase or sell the Fund's Shares.
Risk Lose Money [Text]	rr_RiskLoseMoney	As with any investment, you could lose all or part of your investment in the Fund, and the Fund's performance could trail that of other investments
Risk Nondiversified Status [Text]	rr_RiskNondiversifiedStatus	The Fund is classified as a “non-diversified” investment company under the 1940 Act. As a result, the Fund is subject to the risk that it will be more volatile than a diversified fund because the Fund may invest its assets in a smaller number of issuers or may invest a larger proportion of its assets in a single issuer. As a result, the gains and losses on a single investment may have a greater impact on the Fund’s NAV and may make the Fund more volatile than more diversified funds.
Bar Chart and Performance Table [Heading]	rr_BarChartAndPerformanceTableHeading	PERFORMANCE INFORMATION
Performance Narrative [Text Block]	rr_PerformanceNarrativeTextBlock	The Fund does not have a full calendar year of performance. Thus, no bar chart or Average Annual Total Returns table is included for the Fund.
Performance One Year or Less [Text]	rr_PerformanceOneYearOrLess	The Fund does not have a full calendar year of performance. Thus, no bar chart or Average Annual Total Returns table is included for the Fund.
Global X Health & Wellness Thematic ETF (Prospectus) \| Global X Health & Wellness Thematic ETF \| Global X Health & Wellness Thematic ETF
Prospectus:	rr_ProspectusTable
Trading Symbol	dei_TradingSymbol	BFIT
Management Fees (as a percentage of Assets)	rr_ManagementFeesOverAssets	0.68%
Distribution and Service (12b-1) Fees	rr_DistributionAndService12b1FeesOverAssets	none
Other Expenses (as a percentage of Assets):	rr_OtherExpensesOverAssets	none
Expenses (as a percentage of Assets)	rr_ExpensesOverAssets	0.68%
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	$ 69
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	$ 218
Global X Longevity Thematic ETF (Prospectus) \| Global X Longevity Thematic ETF
Prospectus:	rr_ProspectusTable
Risk/Return [Heading]	rr_RiskReturnHeading	Global X Longevity Thematic ETF
Objective [Heading]	rr_ObjectiveHeading	INVESTMENT OBJECTIVE
Objective, Primary [Text Block]	rr_ObjectivePrimaryTextBlock	The Global X Longevity Thematic ETF (“Fund”) seeks to provide investment results that correspond generally to the price and yield performance, before fees and expenses, of the INDXX Global Longevity Thematic Index (“Underlying Index”).
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 and hold shares (“Shares”) of the Fund. You will also incur usual and customary brokerage commissions when buying and selling Shares.
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 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.
Expense Exchange Traded Fund Commissions [Text]	rr_ExpenseExchangeTradedFundCommissions	You will also incur usual and customary brokerage commissions when buying and selling Shares.
Expense Example [Heading]	rr_ExpenseExampleHeading	Example:
Expense Example Narrative [Text Block]	rr_ExpenseExampleNarrativeTextBlock	The following example is intended to help you compare the cost of investing in the Fund with the cost of investing in other funds. This example does not take into account customary brokerage commissions that you pay when purchasing or selling Shares of the Fund in the secondary market.
Expense Example by, Year, Caption [Text]	rr_ExpenseExampleByYearCaption	The example assumes that you invest $10,000 in the Fund for the time periods indicated and then sell 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:
Strategy [Heading]	rr_StrategyHeading	PRINCIPAL INVESTMENT STRATEGIES
Strategy Narrative [Text Block]	rr_StrategyNarrativeTextBlock	The Fund invests more than 80% of its total assets in the securities of the Underlying Index. The Fund’s 80% investment policy is non-fundamental and requires 60 days’ prior written notice to shareholders before it can be changed. The Fund may lend securities representing up to one-third of the value of the Fund’s total assets (including the value of the collateral received). The Underlying Index is designed to provide exposure to exchange-listed companies in developed markets that facilitate the demographic trend of longer average life spans and the aging of the global population, including but not limited to companies involved in biotechnology, medical devices, pharmaceuticals, senior living facilities and specialized health care services (collectively, “Longevity Companies”), as defined by INDXX, the provider of the Underlying Index. The eligible universe of the Underlying Index includes the most liquid and investable companies in accordance with the standard market capitalization and liquidity criteria associated with developed markets, as defined by the Index Provider. As of April 15, 2016, companies must have a minimum market capitalization of $500 million and a minimum average daily turnover for the last 6 months greater than or equal to $2 million in order to be eligible for inclusion in the Underlying Index. The Underlying Index may include components from the following countries: Australia, Austria, Belgium, Canada, Denmark, Finland, France, Germany, Hong Kong, Ireland, Israel, Italy, Japan, Netherlands, New Zealand, Norway, Portugal, Singapore, Spain, Sweden, Switzerland, South Korea, the United Kingdom and the United States. From the eligible universe, the Index Provider identifies Longevity Companies by applying a proprietary analysis that consists of two primary components: theme identification and company analysis. As of April 15, 2016, the Index Provider has identified the following five themes that are expected to provide the most exposure to Longevity Companies: (1) Health Care Products (2) Health Care Services, (3) Medical Devices, and (4) Senior Homes (collectively, “Longevity Themes”). In order to be included in the Underlying Index, a company must be identified as having significant exposure to one of these Longevity Themes. Companies are analyzed based on two primary criteria: revenue exposure and primary business operations. A company is deemed to have significant exposure to one of the Longevity Themes if (i), according to a public filing, it generates a majority of its revenue from one of the Longevity Themes, (ii), in the absence of a revenue segment breakdown, it has stated its primary business to be in products and services focused on one of the Longevity Themes. Accordingly, the Fund assets will be concentrated (that is, it will hold 25% or more of its total assets) in companies that provide products and services that facilitate the aging of the global population. The Underlying Index is weighted according to a modified capitalization weighting methodology and is reconstituted and rebalanced annually. The Underlying Index may include large-, mid- or small-capitalization companies, and components primarily include health care, biotechnology and pharmaceuticals companies as well as real estate investment trusts (“REITs”). The Fund's investment objective and Underlying Index may be changed without shareholder approval. The Underlying Index is sponsored by the Index Provider, which is an organization that is independent of the Fund and Global X Management Company LLC, the investment adviser for the Fund (“Adviser”). The Index Provider determines the relative weightings of the securities in the Underlying Index and publishes information regarding the market value of the Underlying Index. The Adviser uses a “passive” or indexing approach to try to achieve the Fund’s investment objective. Unlike many investment companies, the Fund does not try to outperform the Underlying Index and does not seek temporary defensive positions when markets decline or appear overvalued. The Fund generally will use a replication strategy. A replication strategy is an indexing strategy that involves investing in the securities of the Underlying Index in approximately the same proportions as in the Underlying Index. However, the Fund may utilize a representative sampling strategy with respect to the Underlying Index when a replication strategy might be detrimental or disadvantageous to shareholders, such as when there are practical difficulties or substantial costs involved in compiling a portfolio of equity securities to replicate the Underlying Index, in instances in which a security in the Underlying Index becomes temporarily illiquid, unavailable or less liquid, or as a result of legal restrictions or limitations (such as tax diversification requirements) that apply to the Fund but not the Underlying Index. The Adviser expects that, over time, the correlation between the Fund’s performance and that of the Underlying Index, before fees and expenses, will exceed 95%. A correlation percentage of 100% would indicate perfect correlation. If the Fund uses a replication strategy, it can be expected to have greater correlation to the Underlying Index than if it uses a representative sampling strategy. The Fund concentrates its investments (i.e., holds 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. As of April 15, 2016, the Underlying Index was concentrated in the Healthcare Sector, the Biotechnology Sector and the Medical Device Sector.
Strategy Portfolio Concentration [Text]	rr_StrategyPortfolioConcentration	The Fund concentrates its investments (i.e., holds 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated.
Risk [Heading]	rr_RiskHeading	SUMMARY OF PRINCIPAL RISKS
Risk Narrative [Text Block]	rr_RiskNarrativeTextBlock	As with any investment, you could lose all or part of your investment in the Fund, and the Fund's performance could trail that of other investments. There is no guarantee that the Fund will achieve its investment objective. The Fund is subject to the principal risks noted below, any of which may adversely affect the Fund's net asset value ("NAV"), trading price, yield, total return and ability to meet its investment objective, as well as other risks that are described in greater detail in the Additional Information About the Fund’s Strategies and Risks section of the Prospectus and in the Statement of Additional Information ("SAI"). ADR/GDR Risk: To the extent the Fund seeks exposure to foreign companies, the Fund’s investments may be in the form of depositary receipts or other securities convertible into securities of foreign issuers, including ADRs and GDRs. While the use of ADRs and GDRs, which are traded on exchanges and represent an ownership in a foreign security, provide an alternative to directly purchasing the underlying foreign securities in their respective national markets and currencies, investments in ADRs and GDRs continue to be subject to certain of the risks associated with investing directly in foreign securities. Asset Class Risk: Securities in the Underlying Index or otherwise held in the Fund's portfolio may underperform in comparison to the general securities markets or other asset classes. Authorized Participants Concentration Risk: The Fund has a limited number of financial institutions that may act as Authorized Participants (“APs”). Only APs who have entered into agreements with the Fund’s distributor may engage in creation or redemption transactions directly with the Fund. To the extent that those APs exit the business or are unable to process creation and/or redemption orders, and no other AP is able to step forward to create or redeem in either of those cases, Shares may trade like closed-end fund shares at a discount to NAV and possibly face trading halts and/or delisting from NASDAQ (the "Exchange"). Concentration Risk: To the extent that the Underlying Index concentrates in the securities of issuers in a particular country, industry, market, asset class, or sector, the Fund will also concentrate its investments to approximately the same extent. By concentrating its investments in a country, industry, market, asset class, or sector, the Fund faces more risks than if it were diversified broadly over numerous countries, industries, markets, asset classes, or sectors. Such risks, any of which may adversely affect the companies in which the Fund invests, may include, but are not limited to, the following: general economic conditions or cyclical market patterns that could negatively affect supply and demand; competition for resources, adverse labor relations, political or world events; obsolescence of technologies; and increased competition or new product introductions that may affect the profitability or viability of companies in a particular country, industry, market, asset class, or sector. In addition, at times, such country, industry, market, asset class, or sector may be out of favor and underperform other similar categories or the market as a whole. For additional details on these risks, please see Risks Related to Investing in the Healthcare Sector, Risks Related to Investing in the Biotechnology Sector, Risks Related to Investing in the Medical Devices Sector Risks, Related to Investing in the Pharmaceutical Sector, Risks Related to Investing in Denmark and Risks Related to Investing in Longevity Companies. Currency Risk: The Fund may invest in securities denominated in foreign currencies. Because the Fund's NAV is determined in U.S. dollars, the Fund's NAV could decline if the relevant foreign currencies depreciate against the U.S. dollar. Cyber Security Risk: Failures or breaches of the electronic systems of the Fund, the Fund's adviser, and the Fund's other service providers, market makers, Authorized Participants or the issuers of securities in which the Fund invests have the ability to cause disruptions and negatively impact the Fund's business operations, potentially resulting in financial losses to the Fund and its shareholders. While the Fund has established business continuity plans and risk management systems seeking to address system breaches or failures, there are inherit limitations in such plans and systems. Furthermore, the Fund cannot control the cyber security plans and systems of the Fund's service providers, market makers, Authorized Participants or issuers of securities in which the Fund invests. Equity Securities Risk: Equity securities are subject to changes in value and their values may be more volatile than other asset classes, as a result of such factors as a company’s business performance, investor perceptions, stock market trends and general economic conditions. Foreign Securities Risk: Investments in the securities of foreign issuers are subject to the risks associated with investing in those foreign markets, such as heightened risks of inflation or nationalization. In addition, securities of foreign issuers may lose value due to political, economic and geographic events affecting a foreign issuer or market. During periods of social, political or economic instability in a country or region, the value of a foreign security traded on U.S. exchanges, nonetheless, could be affected by, among other things, increasing price volatility, illiquidity, or the closure of the primary market on which the security is traded. The Fund may lose value due to political, economic and geographic events affecting a foreign issuer or market. Geographic Risk: A natural disaster could occur in a geographic region in which the Fund invests, which could affect the economy or particular business operations of companies in the specific geographic region, causing an adverse impact on the Fund’s investments in the affected region. International Closed-Market Trading: Because the Fund’s investments may be traded in markets that are closed when the Exchange is open, there are likely to be deviations between the current value of an underlying investment and last sale pricing (i.e., the last quote from its closed foreign market), resulting in premiums or discounts to NAV that may be greater than those experienced by other exchange-traded funds. Investment Risk: An investment in the Fund is not a deposit in a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. When you sell your Shares, they could be worth less than what you paid for them. Issuer Risk: Fund performance depends on the performance of individual companies in which the Fund invests. Changes to the financial condition of any of those companies may cause the value of their securities to decline. Large-Capitalization Companies Risk: Large-capitalization companies may trail the returns of the overall stock market. Large-capitalization stocks tend to go through cycles of doing better - or worse - than the stock market in general. These periods have, in the past, lasted for as long as several years. Market Risk: Turbulence in the financial markets and reduced liquidity may negatively affect issuers, which could have an adverse effect on the Fund. In addition, there is a risk that policy changes by the U.S. Government, Federal Reserve, or other government actors, which could include increasing interest rates, could cause increased volatility in financial markets and lead to higher levels of Fund redemptions, which could have a negative impact on the Fund. The Fund’s NAV could decline over short periods due to short-term market movements and over longer periods during market downturns. Market Trading Risk: The Fund faces numerous market trading risks, including the potential lack of an active market for Shares, losses from trading in secondary markets, periods of high volatility and disruption in the creation/redemption process of the Fund. Any of these factors may lead to the Shares trading at a premium or discount to NAV. Non-Diversification Risk: The Fund is classified as a “non-diversified” investment company under the Investment Company Act of 1940 ("1940 Act"). As a result, the Fund is subject to the risk that it will be more volatile than a diversified fund because the Fund may invest its assets in a smaller number of issuers or may invest a larger proportion of its assets in a single issuer. As a result, the gains and losses on a single investment may have a greater impact on the Fund’s NAV and may make the Fund more volatile than more diversified funds. Operational Risk: The Fund is exposed to operational risk arising from a number of factors, including but not limited to human error, processing and communication errors, errors of the Fund's service providers, counterparties or other third-parties, failed or inadequate processes and technology or systems failures. The Fund and the Adviser seek to reduce these operational risks through controls and procedures. However, these measures do not address every possible risk and may be inadequate for those risks that they are intended to address. Passive Investment Risk: The Fund is not actively managed and the Adviser does not attempt to take defensive positions in declining markets. Unlike many investment companies, the Fund does not utilize an investing strategy that seeks returns in excess of its Underlying Index. Therefore, it would not necessarily buy or sell a security unless that security is added or removed, respectively, from the Underlying Index, even if that security generally is underperforming. Maintaining investments in securities regardless of market conditions or the performance of individual securities could cause the Fund’s return to be lower than if the Fund employed an active strategy. Premium/Discount Risk: Disruptions to creations and redemptions, the existence of extreme market volatility or potential lack of an active trading market for Shares may result in Shares trading at a significant premium or discount to NAV. If a shareholder purchases Shares at a time when the market price is at a premium to the NAV or sells Shares at a time when the market price is at a discount to the NAV, the shareholder may sustain losses. Risk of Investing in Developed Countries: The Fund’s investment in developed country issuers may subject the Fund to regulatory, political, currency, security, and economic risks specific to developed countries. Developed countries tend to represent a significant portion of the global economy and have generally experienced slower economic growth than some other countries. A majority of developed countries have recently experienced a significant economic slowdown. In addition, developed countries may be impacted by changes to the economic health of certain key trading partners, regulatory burdens, debt burdens and the price or availability of certain commodities. Risks Related to Investing in the Biotechnology Sector: Biotechnology companies face intense competition and the potential for rapid product obsolescence. Biotechnology companies may be adversely affected by the loss or impairment of intellectual property rights or changes in government regulations. Risks Related to Investing in the Healthcare Sector: The healthcare sector may be affected by government regulations and government healthcare programs, increases or decreases in the cost of medical products and services and product liability claims, among other factors. Many healthcare companies are heavily dependent on patent protection, and the expiration of a company’s patent may adversely affect that company’s profitability. Healthcare companies are subject to competitive forces that may result in price discounting, and may be thinly capitalized and susceptible to product obsolescence. Risks Related to Investing in the Medical Device Sector: Companies in the medical equipment industry may be affected by the expiration of patents, litigation based on product liability, industry competition, product obsolescence and regulatory approvals, among other factors. Risks Related to Investing in the Pharmaceutical Sector: Companies in the pharmaceuticals industry may be affected by industry competition, dependency on a limited number of products, obsolescence of products, government approvals and regulations, loss or impairment of intellectual property rights and litigation regarding product liability. Risks Related to Investing in Real Estate Stocks and Real Estate Investment Trusts ("REIT"): The Fund may invest in an underlying fund that invests in companies that invest in real estate, such as REITs, which exposes investors in the Fund to the risks of owning real estate directly, as well as to risks that relate specifically to the way in which real estate companies are organized and operated. Real estate is highly sensitive to general and local economic conditions and developments, and characterized by intense competition and periodic overbuilding. Many real estate companies, including REITs, utilize leverage (and some may be highly leveraged), which increases risk and could adversely affect a real estate company's operations and market value in periods of rising interest rates. Risks Related to Investing in Denmark: Investments in Danish issuers subject the Fund to legal, regulatory, political, currency, security, and economic risks specific to Denmark. The Danish economy, along with certain other European Union (the “EU”) economies, experienced a significant economic slowdown during the recent financial crisis. Denmark’s economy has also been characterized by slow growth and is facing demographic challenges that could lead to labor supply shortages in the near future. Risks Related to Investing in Longevity Companies: The Fund invests in longevity companies, including pharmaceutical and biotechnology companies involved in the research, development, production and/or manufacturing of drugs; suppliers or manufacturers of medical devices; companies operating skilled nursing homes, senior living homes and continuing care communities; and providers of health care services, including home healthcare providers. Longevity companies may be affected by industry competition, dependency on a limited number of products, obsolescence of products, government approvals and regulations, loss or impairment of intellectual property rights and litigation regarding product liability. Longevity companies may be affected by government regulations and government healthcare programs, as well as increases or decreases in the cost of medical products and services and product liability claims. Many longevity companies are heavily dependent on patent protection, and the expiration of a company’s patent may adversely affect that company’s profitability. Secondary Market Trading Risk: Investors buying or selling Shares in the secondary market may pay brokerage commissions, which may be a significant proportional cost for investors seeking to buy or sell relatively small amounts of Shares. Although Shares are listed on the Exchange, there can be no assurance that an active or liquid trading market for them will develop or be maintained. In addition, trading in Shares on the Exchange may be halted. Small- and Mid-Capitalization Companies Risk: Small- and mid-capitalization companies often have greater price volatility, lower trading volume and less liquidity than larger more established companies. In addition, these companies are often subject to less analyst coverage and may be in early and less predictable periods of their corporate existences. These companies tend to have smaller revenues, narrower product lines, less management depth and experience, smaller shares of their product or service markets, fewer financial resources and less competitive strength than larger companies. Tracking Error Risk: The Fund’s return may not match the return of the Underlying Index for a number of reasons. For example, the Fund incurs operating expenses not applicable to the Underlying Index, and incurs costs in buying and selling securities, especially when rebalancing the Fund’s securities holdings to reflect changes in the composition of the Underlying Index. In addition, the performance of the Fund and the Underlying Index may vary due to asset valuation differences and differences between the Fund’s portfolio and the Underlying Index resulting from legal restrictions, costs or liquidity constraints. Trading Halt Risk: An exchange or market may close or issue trading halts on specific securities, or the ability to buy or sell certain securities or financial instruments may be restricted, which may result in the Fund being unable to buy or sell certain securities or financial instruments. In such circumstances, the Fund may be unable to rebalance its portfolio, may be unable to accurately price its investments and/or may incur substantial trading losses. Valuation Risk: The sales price the Fund could receive for a security may differ from the Fund’s valuation of the security and may differ from the value used by the Underlying Index, particularly for securities that trade in low value or volatile markets or that are valued using a fair value methodology. The value of the securities in the Fund's portfolio may change on days when shareholders will not be able to purchase or sell the Fund's Shares.
Risk Lose Money [Text]	rr_RiskLoseMoney	As with any investment, you could lose all or part of your investment in the Fund, and the Fund's performance could trail that of other investments.
Risk Nondiversified Status [Text]	rr_RiskNondiversifiedStatus	The Fund is classified as a “non-diversified” investment company under the Investment Company Act of 1940 ("1940 Act"). As a result, the Fund is subject to the risk that it will be more volatile than a diversified fund because the Fund may invest its assets in a smaller number of issuers or may invest a larger proportion of its assets in a single issuer. As a result, the gains and losses on a single investment may have a greater impact on the Fund’s NAV and may make the Fund more volatile than more diversified funds.
Bar Chart and Performance Table [Heading]	rr_BarChartAndPerformanceTableHeading	PERFORMANCE INFORMATION
Performance Narrative [Text Block]	rr_PerformanceNarrativeTextBlock	The Fund does not have a full calendar year of performance. Thus, no bar chart or Average Annual Total Returns table is included for the Fund.
Performance One Year or Less [Text]	rr_PerformanceOneYearOrLess	The Fund does not have a full calendar year of performance. Thus, no bar chart or Average Annual Total Returns table is included for the Fund.
Global X Longevity Thematic ETF (Prospectus) \| Global X Longevity Thematic ETF \| Global X Longevity Thematic ETF
Prospectus:	rr_ProspectusTable
Trading Symbol	dei_TradingSymbol	LNGR
Management Fees (as a percentage of Assets)	rr_ManagementFeesOverAssets	0.68%
Distribution and Service (12b-1) Fees	rr_DistributionAndService12b1FeesOverAssets	none
Other Expenses (as a percentage of Assets):	rr_OtherExpensesOverAssets	none
Expenses (as a percentage of Assets)	rr_ExpensesOverAssets	0.68%
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	$ 69
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	$ 218
Global X Millennials Thematic ETF (Prospectus) \| Global X Millennials Thematic ETF
Prospectus:	rr_ProspectusTable
Risk/Return [Heading]	rr_RiskReturnHeading	Global X Millennials Thematic ETF
Objective [Heading]	rr_ObjectiveHeading	INVESTMENT OBJECTIVE
Objective, Primary [Text Block]	rr_ObjectivePrimaryTextBlock	The Global X Millennials Thematic ETF (“Fund”) seeks to provide investment results that correspond generally to the price and yield performance, before fees and expenses, of the INDXX Millennials Thematic Index (“Underlying Index”).
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 and hold shares (“Shares”) of the Fund. You will also incur usual and customary brokerage commissions when buying and selling Shares.
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 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.
Expense Exchange Traded Fund Commissions [Text]	rr_ExpenseExchangeTradedFundCommissions	You will also incur usual and customary brokerage commissions when buying and selling Shares.
Expense Example [Heading]	rr_ExpenseExampleHeading	Example:
Expense Example Narrative [Text Block]	rr_ExpenseExampleNarrativeTextBlock	The following example is intended to help you compare the cost of investing in the Fund with the cost of investing in other funds. This example does not take into account customary brokerage commissions that you pay when purchasing or selling Shares of the Fund in the secondary market.
Expense Example by, Year, Caption [Text]	rr_ExpenseExampleByYearCaption	The example assumes that you invest $10,000 in the Fund for the time periods indicated and then sell 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:One YearThree Years$69$218
Strategy [Heading]	rr_StrategyHeading	PRINCIPAL INVESTMENT STRATEGIES
Strategy Narrative [Text Block]	rr_StrategyNarrativeTextBlock	The Fund invests more than 80% of its total assets in the securities of the Underlying Index. The Fund’s 80% investment policy is non-fundamental and requires 60 days’ prior written notice to shareholders before it can be changed. The Fund may lend securities representing up to one-third of the value of the Fund’s total assets (including the value of the collateral received). The Underlying Index is designed to measure the performance of U.S. listed companies that provide exposure to the millennial generation, (collectively, “Millennial Companies”), as defined by INDXX, the provider of the Underlying Index ("Index Provider"). The millennial generation refers to the demographic cohort in the U.S. with birth years ranging from 1980 to 2000. The eligible universe of the Underlying Index includes the most liquid and investable companies in accordance with the standard market capitalization and liquidity criteria associated with developed markets, as defined by the Index Provider. As of April 15, 2016, companies must have a minimum market capitalization of $500 million and a minimum average daily turnover for the last 6 months greater than or equal to $2 million in order to be eligible for inclusion in the Underlying Index. The Underlying Index only includes companies listed in the United States. The Underlying Index is developed using a proprietary, multi-step research process to identify Millennial Companies. First, the Index Provider conducts fundamental research on trends related to the millennial generation, including but not limited to: consumer spending data, consumer behavior, technology and demographics. Based on this analysis, the Index Provider determines key categories that appear to be most reflective of how individuals from the millennial generation spend their time and money (collectively, “Spending Categories”). As of April 15, 2016, the Index Provider has identified the following eight key Spending Categories for millennials: (1) Social and Entertainment, (2) Clothing and Apparel, (3) Travel and Mobility, (4) Food/Restaurants and Consumer Staples, (5), Financial Services and Investments, (6) Housing and Home Goods, (7) Education and Employment, and (8) Health and Fitness. These Spending Categories may change over time. After establishing these Spending Categories, the Index Provider uses a variety of sources - including, but not limited to: industry reports, investment research and financial statements published by companies - to identify companies with significant exposure to these Spending Categories. A company is determined to have significant exposure to a Spending Category if, (i) according to a public filing, it generates a majority of its revenue from one of the Spending Categories, (ii), in the absence of a revenue segment breakdown, it has stated its primary business to be in products and services focused on one of the Spending Categories. The companies identified at this stage are then considered for further analysis, which ultimately determines their eligibility for inclusion in the Underlying Index. In the final step of the selection process, the Index Provider conducts a composite analysis on the remaining companies to identify Millennial Companies within each of the Spending Categories. As part of this process, the Index Provider utilizes the fundamental research it has conducted on trends related to the millennial generation in order to evaluate companies based on quantitative and qualitative criteria that have been identified as being consistent with millennial demographics and consumer preferences. As of April 15, 2016, some examples of the criteria used in the evaluation process include but are not limited to Ecommerce, social and professional networks, digital media streaming services, athletic and outdoor apparel, multi-family apartments, and peer reviews/recommendations. The Index Provider then scores the companies based on these criteria to determine the companies that are most reflective of Millennial Companies within each Spending Category. These criteria will vary by Spending Category and are subject to evaluation on an annual basis. A minimum of five and a maximum of fifteen companies from each Spending Category are included in the Underlying Index, primarily based on their score in the composite analysis. The Underlying Index is weighted according to a modified capitalization weighting methodology and is reconstituted and rebalanced annually. The Underlying Index may include large-, mid- or small-capitalization companies, and components primarily include consumer discretionary, consumer staples, information technology and financial services companies as well as real estate investment trusts (“REITs”). The Fund's investment objective and Underlying Index may be changed without shareholder approval. The Underlying Index is sponsored by the Index Provider, which is an organization that is independent of the Fund and Global X Management Company LLC, the investment adviser for the Fund (“Adviser”). The Index Provider determines the relative weightings of the securities in the Underlying Index and publishes information regarding the market value of the Underlying Index. The Adviser uses a “passive” or indexing approach to try to achieve the Fund’s investment objective. Unlike many investment companies, the Fund does not try to outperform the Underlying Index and does not seek temporary defensive positions when markets decline or appear overvalued. The Fund generally will use a replication strategy. A replication strategy is an indexing strategy that involves investing in the securities of the Underlying Index in approximately the same proportions as in the Underlying Index. However, the Fund may utilize a representative sampling strategy with respect to the Underlying Index when a replication strategy might be detrimental or disadvantageous to shareholders, such as when there are practical difficulties or substantial costs involved in compiling a portfolio of equity securities to replicate the Underlying Index, in instances in which a security in the Underlying Index becomes temporarily illiquid, unavailable or less liquid, or as a result of legal restrictions or limitations (such as tax diversification requirements) that apply to the Fund but not the Underlying Index. The Adviser expects that, over time, the correlation between the Fund’s performance and that of the Underlying Index, before fees and expenses, will exceed 95%. A correlation percentage of 100% would indicate perfect correlation. If the Fund uses a replication strategy, it can be expected to have greater correlation to the Underlying Index than if it uses a representative sampling strategy. The Fund concentrates its investments (i.e., holds 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. As of April 15, 2016, the Underlying Index was concentrated in the Consumer Discretionary Sector and the Information Technology Sector.
Strategy Portfolio Concentration [Text]	rr_StrategyPortfolioConcentration	The Fund concentrates its investments (i.e., holds 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated.
Risk [Heading]	rr_RiskHeading	SUMMARY OF PRINCIPAL RISKS
Risk Narrative [Text Block]	rr_RiskNarrativeTextBlock	As with any investment, you could lose all or part of your investment in the Fund, and the Fund's performance could trail that of other investments. There is no guarantee that the Fund will achieve its investment objective. The Fund is subject to the principal risks noted below, any of which may adversely affect the Fund's net asset value ("NAV"), trading price, yield, total return and ability to meet its investment objective, as well as other risks that are described in greater detail in the Additional Information About the Fund’s Strategies and Risks section of the Prospectus and in the Statement of Additional Information ("SAI"). ADR Risk: To the extent the Fund seeks exposure to foreign companies, the Fund’s investments may be in the form of depositary receipts or other securities convertible into securities of foreign issuers, including ADRs. While the use of ADRs, which are traded on exchanges and represent an ownership in a foreign security, provide an alternative to directly purchasing the underlying foreign securities in their respective national markets and currencies, investments in ADRs continue to be subject to certain of the risks associated with investing directly in foreign securities. Asset Class Risk: Securities in the Underlying Index or otherwise held in the Fund's portfolio may underperform in comparison to the general securities markets or other asset classes. Authorized Participants Concentration Risk: The Fund has a limited number of financial institutions that may act as Authorized Participants (“APs”). Only APs who have entered into agreements with the Fund’s distributor may engage in creation or redemption transactions directly with the Fund. To the extent that those APs exit the business or are unable to process creation and/or redemption orders, and no other AP is able to step forward to create or redeem in either of those cases, Shares may trade like closed-end fund shares at a discount to NAV and possibly face trading halts and/or delisting from NASDAQ (the "Exchange"). Concentration Risk: To the extent that the Underlying Index concentrates in the securities of issuers in a particular country, industry, market, asset class, or sector, the Fund will also concentrate its investments to approximately the same extent. By concentrating its investments in a country, industry, market, asset class, or sector, the Fund faces more risks than if it were diversified broadly over numerous countries, industries, markets, asset classes, or sectors. Such risks, any of which may adversely affect the companies in which the Fund invests, may include, but are not limited to, the following: general economic conditions or cyclical market patterns that could negatively affect supply and demand; competition for resources, adverse labor relations, political or world events; obsolescence of technologies; and increased competition or new product introductions that may affect the profitability or viability of companies in a particular country, industry, market, asset class, or sector. In addition, at times, such country, industry, market, asset class, or sector may be out of favor and underperform other similar categories or the market as a whole. For additional details on these risks, please see Risks Related to Investing in the Consumer Discretionary Sector, Risks Related to Investing in the Consumer Staples Sector, Risks Related to Investing in the Information Technology Sector and Risks Related to Investing in Millennial Companies. Cyber Security Risk: Failures or breaches of the electronic systems of the Fund, the Fund's adviser, and the Fund's other service providers, market makers, Authorized Participants or the issuers of securities in which the Fund invests have the ability to cause disruptions and negatively impact the Fund's business operations, potentially resulting in financial losses to the Fund and its shareholders. While the Fund has established business continuity plans and risk management systems seeking to address system breaches or failures, there are inherit limitations in such plans and systems. Furthermore, the Fund cannot control the cyber security plans and systems of the Fund's service providers, market makers, Authorized Participants or issuers of securities in which the Fund invests. Equity Securities Risk: Equity securities are subject to changes in value and their values may be more volatile than other asset classes, as a result of such factors as a company’s business performance, investor perceptions, stock market trends and general economic conditions. Investment Risk: An investment in the Fund is not a deposit in a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. When you sell your Shares, they could be worth less than what you paid for them. Issuer Risk: Fund performance depends on the performance of individual companies in which the Fund invests. Changes to the financial condition of any of those companies may cause the value of their securities to decline. Large-Capitalization Companies Risk: Large-capitalization companies may trail the returns of the overall stock market. Large-capitalization stocks tend to go through cycles of doing better - or worse - than the stock market in general. These periods have, in the past, lasted for as long as several years. Management Risk: The Fund is subject to the risk that the Adviser’s investment management strategy may cause the Fund to underperform the market or its relevant benchmark or adversely affect the ability of the Fund to achieve its investment objective. Market Risk: Turbulence in the financial markets and reduced liquidity may negatively affect issuers, which could have an adverse effect on the Fund. In addition, there is a risk that policy changes by the U.S. Government, Federal Reserve, or other government actors, which could include increasing interest rates, could cause increased volatility in financial markets and lead to higher levels of Fund redemptions, which could have a negative impact on the Fund. The Fund’s NAV could decline over short periods due to short-term market movements and over longer periods during market downturns. Market Trading Risk: The Fund faces numerous market trading risks, including the potential lack of an active market for Shares, losses from trading in secondary markets, periods of high volatility and disruption in the creation/redemption process of the Fund. Any of these factors may lead to the Shares trading at a premium or discount to NAV. Non-Diversification Risk: The Fund is classified as a “non-diversified” investment company under the Investment Company Act of 1940 ("1940 Act"). As a result, the Fund is subject to the risk that it will be more volatile than a diversified fund because the Fund may invest its assets in a smaller number of issuers or may invest a larger proportion of its assets in a single issuer. As a result, the gains and losses on a single investment may have a greater impact on the Fund’s NAV and may make the Fund more volatile than more diversified funds. Operational Risk: The Fund is exposed to operational risk arising from a number of factors, including but not limited to human error, processing and communication errors, errors of the Fund's service providers, counterparties or other third-parties, failed or inadequate processes and technology or systems failures. The Fund and the Adviser seek to reduce these operational risks through controls and procedures. However, these measures do not address every possible risk and may be inadequate for those risks that they are intended to address. Passive Investment Risk: The Fund is not actively managed and the Adviser does not attempt to take defensive positions in declining markets. Unlike many investment companies, the Fund does not utilize an investing strategy that seeks returns in excess of its Underlying Index. Therefore, it would not necessarily buy or sell a security unless that security is added or removed, respectively, from the Underlying Index, even if that security generally is underperforming. Maintaining investments in securities regardless of market conditions or the performance of individual securities could cause the Fund’s return to be lower than if the Fund employed an active strategy. Premium/Discount Risk: Disruptions to creations and redemptions, the existence of extreme market volatility or potential lack of an active trading market for Shares may result in Shares trading at a significant premium or discount to NAV. If a shareholder purchases Shares at a time when the market price is at a premium to the NAV or sells Shares at a time when the market price is at a discount to the NAV, the shareholder may sustain losses. Secondary Market Trading Risk: Investors buying or selling Shares in the secondary market may pay brokerage commissions, which may be a significant proportional cost for investors seeking to buy or sell relatively small amounts of Shares. Although Shares are listed on the Exchange, there can be no assurance that an active or liquid trading market for them will develop or be maintained. In addition, trading in Shares on the Exchange may be halted. Small- and Mid-Capitalization Companies Risk: Small- and mid-capitalization companies often have greater price volatility, lower trading volume and less liquidity than larger more established companies. In addition, these companies are often subject to less analyst coverage and may be in early and less predictable periods of their corporate existences. These companies tend to have smaller revenues, narrower product lines, less management depth and experience, smaller shares of their product or service markets, fewer financial resources and less competitive strength than larger companies. Risks Related to Investing in the Consumer Discretionary Sector: The consumer discretionary sector may be affected by changes in domestic and international economies, exchange and interest rates, competition, consumers’ disposable income and consumer preferences, social trends and marketing campaigns. Risks Related to Investing in Real Estate Stocks and Real Estate Investment Trusts ("REITs"): The Fund may invest in an underlying fund that invests in companies that invest in real estate, such as REITs, which exposes investors in the Fund to the risks of owning real estate directly, as well as to risks that relate specifically to the way in which real estate companies are organized and operated. Real estate is highly sensitive to general and local economic conditions and developments, and characterized by intense competition and periodic overbuilding. Many real estate companies, including REITs, utilize leverage (and some may be highly leveraged), which increases risk and could adversely affect a real estate company's operations and market value in periods of rising interest rates. Risks Related to Investing in the Consumer Staples Sector: The consumer staples sector may be affected by marketing campaigns, changes in consumer demands, government regulations and changes in commodity prices. Risks Related to Investing in the Information Technology Sector: Information technology companies may have limited product lines, markets, financial resources or personnel. Information technology companies typically face intense competition and potentially rapid product obsolescence. They are also heavily dependent on intellectual property rights and may be adversely affected by loss or impairment of those rights. Risks Related to Investing in Millennial Companies: The Fund invests in millennial companies, including companies involved in producing or distributing clothing and apparel, food (including restaurants), and consumer staples, as well as companies involved in the provision of social networks and social media, digital media, live events and entertainment, travel and transportation services, financial services and investments, housing and housing services and educational services. Millennial companies may be affected by changes in consumers’ disposable income, consumer preferences, social trends and marketing campaigns. Millennial companies generally face a high degree of competition and potentially rapid product obsolescence. Tracking Error Risk: The Fund’s return may not match the return of the Underlying Index for a number of reasons. For example, the Fund incurs operating expenses not applicable to the Underlying Index, and incurs costs in buying and selling securities, especially when rebalancing the Fund’s securities holdings to reflect changes in the composition of the Underlying Index. In addition, the performance of the Fund and the Underlying Index may vary due to asset valuation differences and differences between the Fund’s portfolio and the Underlying Index resulting from legal restrictions, costs or liquidity constraints. Trading Halt Risk: An exchange or market may close or issue trading halts on specific securities, or the ability to buy or sell certain securities or financial instruments may be restricted, which may result in the Fund being unable to buy or sell certain securities or financial instruments. In such circumstances, the Fund may be unable to rebalance its portfolio, may be unable to accurately price its investments and/or may incur substantial trading losses. Valuation Risk: The sales price the Fund could receive for a security may differ from the Fund’s valuation of the security and may differ from the value used by the Underlying Index, particularly for securities that trade in low value or volatile markets or that are valued using a fair value methodology. The value of the securities in the Fund's portfolio may change on days when shareholders will not be able to purchase or sell the Fund's Shares.
Risk Lose Money [Text]	rr_RiskLoseMoney	As with any investment, you could lose all or part of your investment in the Fund, and the Fund's performance could trail that of other investments.
Risk Nondiversified Status [Text]	rr_RiskNondiversifiedStatus	The Fund is classified as a “non-diversified” investment company under the Investment Company Act of 1940 ("1940 Act"). As a result, the Fund is subject to the risk that it will be more volatile than a diversified fund because the Fund may invest its assets in a smaller number of issuers or may invest a larger proportion of its assets in a single issuer. As a result, the gains and losses on a single investment may have a greater impact on the Fund’s NAV and may make the Fund more volatile than more diversified funds.
Bar Chart and Performance Table [Heading]	rr_BarChartAndPerformanceTableHeading	PERFORMANCE INFORMATION
Performance Narrative [Text Block]	rr_PerformanceNarrativeTextBlock	The Fund does not have a full calendar year of performance. Thus, no bar chart or Average Annual Total Returns table is included for the Fund.
Performance One Year or Less [Text]	rr_PerformanceOneYearOrLess	The Fund does not have a full calendar year of performance. Thus, no bar chart or Average Annual Total Returns table is included for the Fund.
Global X Millennials Thematic ETF (Prospectus) \| Global X Millennials Thematic ETF \| Global X Millennials Thematic ETF
Prospectus:	rr_ProspectusTable
Trading Symbol	dei_TradingSymbol	MILN
Management Fees (as a percentage of Assets)	rr_ManagementFeesOverAssets	0.68%
Distribution and Service (12b-1) Fees	rr_DistributionAndService12b1FeesOverAssets	none
Other Expenses (as a percentage of Assets):	rr_OtherExpensesOverAssets	none
Expenses (as a percentage of Assets)	rr_ExpensesOverAssets	0.68%
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	$ 69
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	$ 218