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Label Element Value
Prospectus: rr_ProspectusTable  
Document Type dei_DocumentType 485BPOS
Document Period End Date dei_DocumentPeriodEndDate Oct. 31, 2015
Entity Registrant Name dei_EntityRegistrantName RYDEX ETF TRUST
Central Index Key dei_EntityCentralIndexKey 0001208211
Amendment Flag dei_AmendmentFlag false
Document Creation Date dei_DocumentCreationDate Feb. 26, 2016
Document Effective Date dei_DocumentEffectiveDate Feb. 29, 2016
Prospectus Date rr_ProspectusDate Feb. 29, 2016
Guggenheim Broad Market and Sector Equal Weight ETFs | Guggenheim S&P 500® Equal Weight ETF  
Prospectus: rr_ProspectusTable  
Risk/Return [Heading] rr_RiskReturnHeading GUGGENHEIM S&P 500® EQUAL WEIGHT ETF (RSP)
Objective [Heading] rr_ObjectiveHeading INVESTMENT OBJECTIVE
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock
The investment objective of the Guggenheim S&P 500® Equal Weight ETF (the “Fund”) is to replicate as closely as possible, before fees and expenses, the daily performance of the S&P 500® Equal Weight Index Total Return (the “Underlying Index”).
Expense [Heading] rr_ExpenseHeading FEES AND EXPENSES OF THE FUND
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock
The table below describes the fees and expenses that you may pay if you buy and hold shares of the Fund. Most investors also will incur customary brokerage commissions when buying or selling shares of the Fund, which are not reflected in the table or the Example. If commissions were included in the table and the Example, the costs shown would be higher.
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption Shareholder Fees (fees paid directly from your investment)
Operating Expenses Caption [Text] rr_OperatingExpensesCaption Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading PORTFOLIO TURNOVER
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock
The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in Total Annual Fund Operating Expenses or in the Example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 22% of the average value of its portfolio. However, the Fund’s portfolio turnover rate is calculated without regard to cash instruments, most derivatives and securities received or delivered as a result of in-kind creations and redemptions of the Fund’s shares. If such instruments were included, the Fund’s portfolio turnover rate might be significantly higher.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 22.00%
Expense Exchange Traded Fund Commissions [Text] rr_ExpenseExchangeTradedFundCommissions Most investors also will incur customary brokerage commissions when buying or selling shares of the Fund, which are not reflected in the table or the Example.
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 funds.
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 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:
Strategy [Heading] rr_StrategyHeading PRINCIPAL INVESTMENT STRATEGIES
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock
The Fund invests primarily in equity securities to meet its investment objective of replicating the Underlying Index as closely as possible, before fees and expenses. The Underlying Index is an unmanaged equal weighted version of the S&P 500® Index, which is an unmanaged capitalization weighted index comprised of 500 common stocks chosen by Standard & Poor’s, a Division of The McGraw-Hill Companies, Inc. (“S&P”) on a statistical basis. Unlike the S&P 500® Index, in which each constituent stock’s weight is proportionate to its market value, each stock in the Underlying Index will be rebalanced quarterly and at other intervals to have the same target weighting as every other stock in the Underlying Index. The equal weighting provides broader exposure to the majority of securities in the Underlying Index than typically may be found in the Underlying Index’s market capitalization weighted counterpart. As of December 31, 2015, the Underlying Index included companies with a capitalization range of $1.7 billion to $587.2 billion.

The Fund uses a passive management strategy, known as “replication,” to track the performance of the Underlying Index. “Replication” refers to investing in substantially all of the securities in the Underlying Index in approximately the same proportions as in the Underlying Index. Under normal circumstances, the Fund will invest at least 90% of its net assets, plus any borrowings for investment purposes, in the equity securities included in the Underlying Index. The Advisor expects that, over time, the correlation between the Fund’s performance, before fees and expenses, and that of the Underlying Index will be 95% or better. A figure of 100% would indicate perfect correlation. The Advisor monitors the Fund’s tracking of the Underlying Index and seeks to maintain an appropriate correlation. The Advisor rebalances the Fund’s portfolio at the same rebalance interval(s) utilized by the Underlying Index.

As long as the Fund invests at least 90% of its total assets in securities included in the Underlying Index, the Fund may hold up to 10% of its assets in investments not included in the Underlying Index, futures contracts, options on futures contracts, options, and swaps related to the Underlying Index, as well as cash and cash equivalents, and shares of investment funds, including money market funds. On a day-to-day basis, the Fund may also hold repurchase agreements, U.S. Government securities or cash equivalents to collateralize its derivatives positions. In an effort to make sure the Fund is fully invested on a day-to-day basis, the Fund may conduct any necessary trading activity at or just prior to the close of the U.S. financial markets.

To the extent the Underlying Index is concentrated in a particular industry the Fund will necessarily be concentrated in that industry. As of the date of this Prospectus, the Fund anticipates that it may have significant exposure to the consumer discretionary, financials, health care, industrials, and information technology sectors. The Fund is non-diversified and, therefore, may invest a greater percentage of its net assets in a particular issuer in comparison to a diversified fund.
Risk [Heading] rr_RiskHeading PRINCIPAL RISKS
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock
As with all exchange-traded funds, a shareholder is subject to the risk that his or her investment could lose money. In addition to this risk, the Fund is subject to a number of additional risks that may affect the value of its shares, including:

Authorized Participant Concentration Risk—Only an Authorized Participant may engage in creation or redemption transactions directly with the Fund. The Fund has a limited number of institutions that serve as Authorized Participants. To the extent that these institutions exit the business or are unable to proceed with creation and/or redemption orders with respect to the Fund and no other Authorized Participant is able to step forward to create or redeem, Fund shares may trade at a discount to NAV and possibly face delisting.

Correlation and Tracking Error Risk—A number of factors may affect the Fund’s ability to achieve a high degree of correlation with its Underlying Index, and there can be no guarantee that the Fund will achieve a high degree of correlation with its Underlying Index either on a single trading day or for a longer time period. Factors such as Fund expenses, imperfect correlation between the Fund’s investments and the components of the Underlying Index, rounding of share prices, changes to the composition of the Underlying Index, regulatory policies, a high portfolio turnover rate, and the use of leverage all contribute to tracking error and correlation risk. Failure to achieve a high degree of correlation may prevent the Fund from achieving its investment objective and cause the Fund's performance to be less than you expect.
 
Equity Risk—The Fund is subject to the risk that the value of the equity securities and equity-based derivatives, if any, in the Fund’s portfolio will decline due to volatility in the equity market caused by general market and economic conditions, perceptions regarding particular industries represented in the equity market, or factors relating to specific companies to which the Fund has investment exposure.

ETF Trading Risks—An unanticipated closing of the Exchange or one or more markets on which either the Fund’s shares trade or the Fund’s portfolio holdings trade or the inability of such markets to open for trading during normal business hours, such as in response to a natural disaster or other event causing severe market disruption, could result in a shareholder’s inability to buy or sell shares of the Fund and the Fund’s inability to buy and sell exchange-traded portfolio securities during that period, or in a disruption of the Fund’s creation and redemption process, and may make it difficult for the Fund to accurately price its investments thereby potentially affecting the price at which Fund shares trade in the secondary market. All of these events could adversely affect the performance of the Fund. Trading in Fund shares also may be halted by the Exchange or other markets because of market conditions or other reasons. If a trading halt occurs, a shareholder may temporarily be unable to purchase or sell shares of the Fund. Similarly, the Exchange or other markets may issue trading halts on specific securities or derivatives, which will affect the ability of the Fund to buy or sell certain securities or derivatives. In such circumstances, the Fund may be unable to rebalance its portfolio or accurately price its investments and may incur substantial trading losses.

Shares also may trade on the Exchange or on other markets at prices below their NAV. The NAV of shares will fluctuate with changes in the market value of the Fund’s holdings and the exchange-traded prices of the Fund's shares may not reflect these market values. Although the Fund’s shares are currently listed on the Exchange, there can be no assurance that an active trading market for shares will develop or be maintained.

Large-Capitalization Securities Risk—The Fund is subject to the risk that large-capitalization stocks may underperform other segments of the equity market or the equity market as a whole. Larger, more established companies may be unable to respond quickly to new competitive challenges such as changes in technology and may not be able to attain the high growth rate of smaller companies, especially during extended periods of economic expansion.

Liquidity and Valuation Risk—In certain circumstances, it may be difficult for the Fund to purchase and sell a particular investment within a reasonable time at a fair price, or the price at which it has been valued by the Advisor for purposes of the Fund’s NAV, causing the Fund to be less liquid. In addition, the ability of the Fund to assign an accurate daily value to certain investments may be difficult, and the Advisor may be required to fair value the investments.

Market Risk—The Fund's investments in equity securities and derivatives, in general, are subject to market risks that may cause their prices, and therefore the Fund's NAV, to fluctuate over time. Markets are subject to political, regulatory, economic and financial market risks.

Non-Diversification Risk—The Fund is considered non-diversified and can invest a greater portion of its assets in securities of individual issuers than a diversified fund. As a result, changes in the market value of a single issuer could cause greater fluctuations in the value of Fund shares than would occur in a diversified fund.

Passive Investment Risk—The Fund is not actively managed and the Advisor does not attempt to take defensive positions in declining markets. Therefore, the Fund may be subject to greater losses in a declining market than a fund that is actively managed.

Sector Risk—The Sector Risk applicable to the Fund is as follows:

Consumer Discretionary Sector Risk. The Fund's investments are exposed to issuers conducting business in the consumer discretionary sector. The Fund is subject to the risk that the securities of such issuers will underperform the market as a whole due to legislative or regulatory changes, adverse market conditions and/or increased competition affecting the consumer discretionary sector. The performance of consumer discretionary companies has historically been closely tied to the performance of the overall economy, and is also affected by interest rates, consumer confidence and spending.

Financials Sector Risk. The Fund's investments are exposed to issuers conducting business in the financials sector. The Fund is subject to the risk that the securities of such issuers will underperform the market as a whole due to legislative or regulatory changes, adverse market conditions and/or increased competition affecting the financials sector. Financials companies are subject to extensive government regulation, which may limit the financial commitments they can make and the interest rates and fees they can charge. Profitability is largely dependent on the availability and cost of capital funds, and can fluctuate significantly when interest rates change or due to increased competition.

Health Care Sector Risk. The Fund's investments are exposed to issuers conducting business in the health care sector. The Fund is subject to the risk that the securities of such issuers will underperform the market as a whole due to legislative or regulatory changes, adverse market conditions and/or increased competition affecting the health care sector. The prices of the securities of health care sector companies are closely tied to government regulation and approval of their products and services, which can have a significant effect on the price and availability of those products and services.

Industrials Sector Risk. The Fund's investments are exposed to issuers conducting business in the industrials sector. The Fund is subject to the risk that the securities of such issuers will underperform the market as a whole due to legislative or regulatory changes, adverse market conditions and/or increased competition affecting the industrials sector. The prices of the securities of industrials companies may fluctuate due to the level and volatility of commodity prices, the exchange value of the dollar, import controls, worldwide competition, liability for environmental damage, depletion of resources, and mandated expenditures for safety and pollution control devices.

Information Technology Sector Risk. The Fund's investments are exposed to issuers conducting business in the information technology sector. The Fund is subject to the risk that the securities of such issuers will underperform the market as a whole due to legislative or regulatory changes, adverse market conditions and/or increased competition affecting the information technology sector. The prices of the securities of information technology companies are closely tied to market competition, increased sensitivity to short product cycles and aggressive pricing, and problems with bringing products to market.

Risk Lose Money [Text] rr_RiskLoseMoney As with all exchange-traded funds, a shareholder is subject to the risk that his or her investment could lose money.
Risk Nondiversified Status [Text] rr_RiskNondiversifiedStatus Non-Diversification Risk—The Fund is considered non-diversified and can invest a greater portion of its assets in securities of individual issuers than a diversified fund. As a result, changes in the market value of a single issuer could cause greater fluctuations in the value of Fund shares than would occur in a diversified fund.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading PERFORMANCE INFORMATION
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock
The following bar chart shows the performance of the shares of the Fund from year to year. The variability of performance over time provides an indication of the risks of investing in the Fund. The following table shows the performance of the shares of the Fund as an average over different periods of time in comparison to the performance of the Underlying Index. In addition to showing the performance of the Underlying Index, the table also shows the performance of the S&P 500® Index Total Return, which is the market capitalization weight version of the Underlying Index. The figures in the bar chart and table assume the reinvestment of dividends and capital gains distributions. Of course, this past performance (before and after taxes) does not necessarily indicate how the Fund will perform in the future.

Updated performance information is available on the Fund’s website at guggenheiminvestments.com or by calling Guggenheim Investments Client Services at 800.820.0888.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The following bar chart shows the performance of the shares of the Fund from year to year. The variability of performance over time provides an indication of the risks of investing in the Fund.
Performance Availability Phone [Text] rr_PerformanceAvailabilityPhone 800.820.0888
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress guggenheiminvestments.com
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Of course, this past performance (before and after taxes) does not necessarily indicate how the Fund will perform in the future.
Bar Chart [Heading] rr_BarChartHeading The performance information shown below is based on a calendar year.
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock
Highest Quarter Return
 
Lowest Quarter Return
Q2 2009
24.68%
 
Q4 2008
-26.82%
Performance Table Heading rr_PerformanceTableHeading AVERAGE ANNUAL TOTAL RETURN (for periods ended December 31, 2015)
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate The after-tax returns presented in the table below are calculated using highest historical individual federal marginal income tax rates and do not reflect the impact of state and local taxes.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred Your actual after-tax returns will depend on your specific tax situation and may differ from those shown below. After-tax returns are not relevant to investors who hold shares of the Fund through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts (“IRAs”).
Performance Table Narrative rr_PerformanceTableNarrativeTextBlock
The after-tax returns presented in the table below are calculated using highest historical individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Your actual after-tax returns will depend on your specific tax situation and may differ from those shown below. After-tax returns are not relevant to investors who hold shares of the Fund through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts (“IRAs”).
Guggenheim Broad Market and Sector Equal Weight ETFs | Guggenheim S&P 500® Equal Weight ETF | S&P 500 Equal Weight Index Total Return  
Prospectus: rr_ProspectusTable  
Index No Deduction for Fees, Expenses, Taxes [Text] rr_IndexNoDeductionForFeesExpensesTaxes (reflects no deduction for fees, expenses or taxes)
Label rr_AverageAnnualReturnLabel S&P 500® Equal Weight Index Total Return (reflects no deduction for fees, expenses or taxes)
1 Year rr_AverageAnnualReturnYear01 (2.19%)
5 Years rr_AverageAnnualReturnYear05 12.37%
10 Years rr_AverageAnnualReturnYear10 8.52%
Guggenheim Broad Market and Sector Equal Weight ETFs | Guggenheim S&P 500® Equal Weight ETF | S&P 500 Index Total Return  
Prospectus: rr_ProspectusTable  
Index No Deduction for Fees, Expenses, Taxes [Text] rr_IndexNoDeductionForFeesExpensesTaxes (reflects no deduction for fees, expenses or taxes)
Label rr_AverageAnnualReturnLabel S&P 500® Index Total Return (reflects no deduction for fees, expenses or taxes)
1 Year rr_AverageAnnualReturnYear01 1.38%
5 Years rr_AverageAnnualReturnYear05 12.57%
10 Years rr_AverageAnnualReturnYear10 7.31%
Guggenheim Broad Market and Sector Equal Weight ETFs | Guggenheim S&P 500® Equal Weight ETF | Guggenheim S&P 500® Equal Weight ETF  
Prospectus: rr_ProspectusTable  
Trading Symbol dei_TradingSymbol RSP
Shareholder Fee, Other rr_ShareholderFeeOther none
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.40%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets none [1]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 0.40%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 41
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 129
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 225
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 506
Annual Return 2006 rr_AnnualReturn2006 15.32%
Annual Return 2007 rr_AnnualReturn2007 1.11%
Annual Return 2008 rr_AnnualReturn2008 (40.40%)
Annual Return 2009 rr_AnnualReturn2009 45.03%
Annual Return 2010 rr_AnnualReturn2010 21.32%
Annual Return 2011 rr_AnnualReturn2011 (0.51%)
Annual Return 2012 rr_AnnualReturn2012 17.05%
Annual Return 2013 rr_AnnualReturn2013 35.59%
Annual Return 2014 rr_AnnualReturn2014 14.03%
Annual Return 2015 rr_AnnualReturn2015 (2.55%)
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Highest Quarter Return
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Jun. 30, 2009
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 24.68%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Lowest Quarter Return
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2008
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (26.82%)
Label rr_AverageAnnualReturnLabel Return Before Taxes
1 Year rr_AverageAnnualReturnYear01 (2.55%)
5 Years rr_AverageAnnualReturnYear05 11.90%
10 Years rr_AverageAnnualReturnYear10 7.93%
Guggenheim Broad Market and Sector Equal Weight ETFs | Guggenheim S&P 500® Equal Weight ETF | Guggenheim S&P 500® Equal Weight ETF | After Taxes on Distributions  
Prospectus: rr_ProspectusTable  
Label rr_AverageAnnualReturnLabel Return After Taxes on Distributions
1 Year rr_AverageAnnualReturnYear01 (3.26%)
5 Years rr_AverageAnnualReturnYear05 11.21%
10 Years rr_AverageAnnualReturnYear10 7.32%
Guggenheim Broad Market and Sector Equal Weight ETFs | Guggenheim S&P 500® Equal Weight ETF | Guggenheim S&P 500® Equal Weight ETF | After Taxes on Distributions and Sales  
Prospectus: rr_ProspectusTable  
Label rr_AverageAnnualReturnLabel Return After Taxes on Distributions and Sale of Fund Shares
1 Year rr_AverageAnnualReturnYear01 (1.44%)
5 Years rr_AverageAnnualReturnYear05 9.15%
10 Years rr_AverageAnnualReturnYear10 6.13%
Guggenheim Broad Market and Sector Equal Weight ETFs | Guggenheim S&P MidCap 400® Equal Weight ETF  
Prospectus: rr_ProspectusTable  
Risk/Return [Heading] rr_RiskReturnHeading GUGGENHEIM S&P MIDCAP 400® EQUAL WEIGHT ETF (EWMC)(FORMERLY, GUGGENHEIM RUSSELL MIDCAP® EQUAL WEIGHT ETF)
Objective [Heading] rr_ObjectiveHeading INVESTMENT OBJECTIVE
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock
The investment objective of the Guggenheim S&P MidCap 400® Equal Weight ETF (the “Fund”) is to correspond as closely as possible, before fees and expenses, to the price and yield performance of the S&P MidCap 400® Equal Weight Index (the “Underlying Index”).
Expense [Heading] rr_ExpenseHeading FEES AND EXPENSES OF THE FUND
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock
The table below describes the fees and expenses that you may pay if you buy and hold shares of the Fund. Most investors also will incur customary brokerage commissions when buying or selling shares of the Fund, which are not reflected in the table or the Example. If commissions were included in the table and the Example, the costs shown would be higher.
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption Shareholder Fees (fees paid directly from your investment)
Operating Expenses Caption [Text] rr_OperatingExpensesCaption Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading PORTFOLIO TURNOVER
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock
The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in Total Annual Fund Operating Expenses or in the Example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 31% of the average value of its portfolio. However, the Fund’s portfolio turnover rate is calculated without regard to cash instruments, most derivatives and securities received or delivered as a result of in-kind creations and redemptions of the Fund’s shares. If such instruments were included, the Fund’s portfolio turnover rate might be significantly higher.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 31.00%
Expense Exchange Traded Fund Commissions [Text] rr_ExpenseExchangeTradedFundCommissions Most investors also will incur customary brokerage commissions when buying or selling shares of the Fund, which are not reflected in the table or the Example.
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 funds.
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 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:
Strategy [Heading] rr_StrategyHeading PRINCIPAL INVESTMENT STRATEGIES
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock
The Fund invests primarily in equity securities to meet its investment objective of replicating the Underlying Index as closely as possible, before fees and expenses. The Underlying Index is an unmanaged equal weighted version of the S&P MidCap 400® Index, which measures the performance of the mid-cap segment of the U.S. equity universe. The S&P MidCap 400® Index consists of U.S. common equities listed on the New York Stock Exchanges (including NYSE Arca and NYSE Amex) and NASDAQ, and also may include equity interests in real estate investment trusts and business development companies. As of December 31, 2015, the Underlying Index included medium-capitalization companies with capitalizations ranging from $661.4 million to $12 billion. In general, the equal weighting provided by the Underlying Index provides equal representation for all securities at the Underlying Index’s rebalance interval(s), thereby providing broader exposure to the majority of securities in the Underlying Index than typically may be found in the Underlying Index’s market capitalization weighted counterpart.

The Fund uses a passive management strategy, known as “replication,” to track the performance of the Underlying Index. “Replication” refers to investing in substantially all of the securities in the Underlying Index in approximately the same proportions as in the Underlying Index. Under normal circumstances, the Fund will invest at least 80% of its net assets, plus any borrowings for investment purposes, in the equity securities included in the Underlying Index. The Advisor expects that, over time, the correlation between the Fund’s performance, before fees and expenses, and that of the Underlying Index will be 95% or better. A figure of 100% would indicate perfect correlation. The Advisor monitors the Fund’s tracking of the Underlying Index and seeks to maintain an appropriate correlation. The Advisor rebalances the Fund’s portfolio at the same rebalance interval(s) utilized by the Underlying Index.

As long as the Fund invests at least 80% of its total assets in securities included in the Underlying Index, the Fund may hold up to 20% of its assets in investments not included in the Underlying Index, futures contracts, options on futures contracts, options, and swaps related to the Underlying Index, as well as cash and cash equivalents, and shares of investment funds, including money market funds. On a day-to-day basis, the Fund may also hold repurchase agreements, U.S. Government securities or cash equivalents to collateralize its derivatives positions. In an effort to make sure the Fund is fully invested on a day-to-day basis, the Fund may conduct any necessary trading activity at or just prior to the close of the U.S. financial markets.

To the extent the Underlying Index is concentrated in a particular industry the Fund will necessarily be concentrated in that industry. As of the date of this Prospectus, the Fund anticipates that it may have significant exposure to the consumer discretionary, financials, industrials, and information technology sectors. The Fund is non-diversified and, therefore, may invest a greater percentage of its assets in a particular issuer in comparison to a diversified fund.
Risk [Heading] rr_RiskHeading PRINCIPAL RISKS
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock
As with all exchange-traded funds, a shareholder is subject to the risk that his or her investment could lose money. In addition to this risk, the Fund is subject to a number of additional risks that may affect the value or liquidity of its shares, including:

Authorized Participant Concentration Risk—Only an Authorized Participant may engage in creation or redemption transactions directly with the Fund. The Fund has a limited number of institutions that serve as Authorized Participants. To the extent that these institutions exit the business or are unable to proceed with creation and/or redemption orders with respect to the Fund and no other Authorized Participant is able to step forward to create or redeem, Fund shares may trade at a discount to NAV and possibly face delisting.

Correlation and Tracking Error Risk—A number of factors may affect the Fund’s ability to achieve a high degree of correlation with its Underlying Index, and there can be no guarantee that the Fund will achieve a high degree of correlation with its Underlying Index either on a single trading day or for a longer time period. Factors such as Fund expenses, imperfect correlation between the Fund’s investments and the components of the Underlying Index, rounding of share prices, changes to the composition of the Underlying Index, regulatory policies, a high portfolio turnover rate, and the use of leverage all contribute to tracking error and correlation risk. Failure to achieve a high degree of correlation may prevent the Fund from achieving its investment objective and cause the Fund's performance to be less than you expect.
 
Equity Risk—The Fund is subject to the risk that the value of the equity securities and equity-based derivatives, if any, in the Fund’s portfolio will decline due to volatility in the equity market caused by general market and economic conditions, perceptions regarding particular industries represented in the equity market, or factors relating to specific companies to which the Fund has investment exposure.

ETF Trading Risks—An unanticipated closing of the Exchange or one or more markets on which either the Fund’s shares trade or the Fund’s portfolio holdings trade or the inability of such markets to open for trading during normal business hours, such as in response to a natural disaster or other event causing severe market disruption, could result in a shareholder’s inability to buy or sell shares of the Fund and the Fund’s inability to buy and sell exchange-traded portfolio securities during that period, or in a disruption of the Fund’s creation and redemption process, and may make it difficult for the Fund to accurately price its investments thereby potentially affecting the price at which Fund shares trade in the secondary market. All of these events could adversely affect the performance of the Fund. Trading in Fund shares also may be halted by the Exchange or other markets because of market conditions or other reasons. If a trading halt occurs, a shareholder may temporarily be unable to purchase or sell shares of the Fund. Similarly, the Exchange or other markets may issue trading halts on specific securities or derivatives, which will affect the ability of the Fund to buy or sell certain securities or derivatives. In such circumstances, the Fund may be unable to rebalance its portfolio or accurately price its investments and may incur substantial trading losses.

Shares also may trade on the Exchange or on other markets at prices below their NAV. The NAV of shares will fluctuate with changes in the market value of the Fund’s holdings and the exchange-traded prices of the Fund's shares may not reflect these market values. Although the Fund’s shares are currently listed on the Exchange, there can be no assurance that an active trading market for shares will develop or be maintained.

Liquidity and Valuation Risk—In certain circumstances, it may be difficult for the Fund to purchase and sell a particular investment within a reasonable time at a fair price, or the price at which it has been valued by the Advisor for purposes of the Fund’s NAV, causing the Fund to be less liquid. In addition, the ability of the Fund to assign an accurate daily value to certain investments may be difficult, and the Advisor may be required to fair value the investments.

Market Risk—The Fund's investments in equity securities and derivatives, in general, are subject to market risks that may cause their prices, and therefore the Fund's NAV, to fluctuate over time. Markets are subject to political, regulatory, economic and financial market risks.

Mid-Capitalization Securities Risk—The Fund is subject to the risk that medium-capitalization stocks may underperform other segments of the equity market or the equity market as a whole. Securities of medium-capitalization companies may experience more price volatility, greater spreads between their bid and ask prices, lower trading volumes, and cyclical or static growth prospects. Medium-capitalization companies often have limited product lines, markets or financial resources, and may therefore be more vulnerable to adverse developments than larger capitalization companies.

Non-Diversification Risk—The Fund is considered non-diversified and can invest a greater portion of its assets in securities of individual issuers than a diversified fund. As a result, changes in the market value of a single issuer could cause greater fluctuations in the value of Fund shares than would occur in a diversified fund.

Passive Investment Risk—The Fund is not actively managed and the Advisor does not attempt to take defensive positions in declining markets. Therefore, the Fund may be subject to greater losses in a declining market than a fund that is actively managed.

Sector Risk—The Sector Risk applicable to the Fund is as follows:

Consumer Discretionary Sector Risk. The Fund's investments are exposed to issuers conducting business in the consumer discretionary sector. The Fund is subject to the risk that the securities of such issuers will underperform the market as a whole due to legislative or regulatory changes, adverse market conditions and/or increased competition affecting the consumer discretionary sector. The performance of consumer discretionary companies has historically been closely tied to the performance of the overall economy, and is also affected by interest rates, consumer confidence and spending.

Financials Sector Risk. The Fund's investments are exposed to issuers conducting business in the financials sector. The Fund is subject to the risk that the securities of such issuers will underperform the market as a whole due to legislative or regulatory changes, adverse market conditions and/or increased competition affecting the financials sector. Financials companies are subject to extensive government regulation, which may limit the financial commitments they can make and the interest rates and fees they can charge. Profitability is largely dependent on the availability and cost of capital funds, and can fluctuate significantly when interest rates change or due to increased competition.

Industrials Sector Risk. The Fund's investments are exposed to issuers conducting business in the industrials sector. The Fund is subject to the risk that the securities of such issuers will underperform the market as a whole due to legislative or regulatory changes, adverse market conditions and/or increased competition affecting the industrials sector. The prices of the securities of industrials companies may fluctuate due to the level and volatility of commodity prices, the exchange value of the dollar, import controls, worldwide competition, liability for environmental damage, depletion of resources, and mandated expenditures for safety and pollution control devices.

Information Technology Sector Risk. The Fund's investments are exposed to issuers conducting business in the information technology sector. The Fund is subject to the risk that the securities of such issuers will underperform the market as a whole due to legislative or regulatory changes, adverse market conditions and/or increased competition affecting the information technology sector. The prices of the securities of information technology companies are closely tied to market competition, increased sensitivity to short product cycles and aggressive pricing, and problems with bringing products to market.

Risk Lose Money [Text] rr_RiskLoseMoney As with all exchange-traded funds, a shareholder is subject to the risk that his or her investment could lose money.
Risk Nondiversified Status [Text] rr_RiskNondiversifiedStatus Non-Diversification Risk—The Fund is considered non-diversified and can invest a greater portion of its assets in securities of individual issuers than a diversified fund. As a result, changes in the market value of a single issuer could cause greater fluctuations in the value of Fund shares than would occur in a diversified fund.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading PERFORMANCE INFORMATION
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock
The following bar chart shows the performance of the shares of the Fund from year to year. The variability of performance over time provides an indication of the risks of investing in the Fund. The following table shows the performance of the shares of the Fund as an average over different periods of time in comparison to the performance of the Underlying Index and the S&P MidCap 400® Index, which is the market capitalization weighted version of the Underlying Index. The table below also includes the Fund's previous underlying index and its market capitalization weighted counterpart. Effective January 26, 2016, the Fund adopted its current investment objective. Prior to January 26, 2016, the Fund sought to correspond as closely as possible, before fees and expenses, to the price and yield performance of the Russell MidCap® Equal Weight Index Total Return. The performance and average annual total returns shown for periods prior to January 26, 2016 would have differed had the Fund's current investment objective been in effect during those periods. The past performance of both the S&P MidCap 400® Equal Weight Index and the Russell MidCap® Equal Weight Index Total Return is shown in the Average Annual Total Returns table below. The figures in the bar chart and table assume the reinvestment of dividends and capital gains distributions. Of course, this past performance (before and after taxes) does not necessarily indicate how the Fund will perform in the future.

Updated performance information is available on the Fund’s website at guggenheiminvestments.com or by calling Guggenheim Investments Client Services at 800.820.0888.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The following bar chart shows the performance of the shares of the Fund from year to year. The variability of performance over time provides an indication of the risks of investing in the Fund.
Performance Availability Phone [Text] rr_PerformanceAvailabilityPhone 800.820.0888
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress guggenheiminvestments.com
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Of course, this past performance (before and after taxes) does not necessarily indicate how the Fund will perform in the future.
Bar Chart [Heading] rr_BarChartHeading The performance information shown below is based on a calendar year.
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock
Highest Quarter Return
 
Lowest Quarter Return
Q1 2013
13.03%
 
Q3 2011
-19.27%
Performance Table Heading rr_PerformanceTableHeading AVERAGE ANNUAL TOTAL RETURN (for periods ended December 31, 2015)
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate The after-tax returns presented in the table below are calculated using highest historical individual federal marginal income tax rates and do not reflect the impact of state and local taxes.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred Your actual after-tax returns will depend on your specific tax situation and may differ from those shown below. After-tax returns are not relevant to investors who hold shares of the Fund through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts (“IRAs”).
Performance Table Narrative rr_PerformanceTableNarrativeTextBlock
The after-tax returns presented in the table below are calculated using highest historical individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Your actual after-tax returns will depend on your specific tax situation and may differ from those shown below. After-tax returns are not relevant to investors who hold shares of the Fund through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts (“IRAs”).
Guggenheim Broad Market and Sector Equal Weight ETFs | Guggenheim S&P MidCap 400® Equal Weight ETF | S&P MidCap 400® Equal Weight Index  
Prospectus: rr_ProspectusTable  
Index No Deduction for Fees, Expenses, Taxes [Text] rr_IndexNoDeductionForFeesExpensesTaxes (reflects no deduction for fees, expenses or taxes)
Label rr_AverageAnnualReturnLabel S&P MidCap 400® Equal Weight Index (reflects no deduction for fees, expenses or taxes)
1 Year rr_AverageAnnualReturnYear01 (5.24%)
5 Years rr_AverageAnnualReturnYear05 9.92%
Since Inception rr_AverageAnnualReturnSinceInception 10.36%
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 03, 2010
Guggenheim Broad Market and Sector Equal Weight ETFs | Guggenheim S&P MidCap 400® Equal Weight ETF | S&P MidCap 400® Index  
Prospectus: rr_ProspectusTable  
Index No Deduction for Fees, Expenses, Taxes [Text] rr_IndexNoDeductionForFeesExpensesTaxes (reflects no deduction for fees, expenses or taxes)
Label rr_AverageAnnualReturnLabel S&P MidCap 400® Index (reflects no deduction for fees, expenses or taxes)
1 Year rr_AverageAnnualReturnYear01 (2.18%)
5 Years rr_AverageAnnualReturnYear05 10.68%
Since Inception rr_AverageAnnualReturnSinceInception 11.03%
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 03, 2010
Guggenheim Broad Market and Sector Equal Weight ETFs | Guggenheim S&P MidCap 400® Equal Weight ETF | Russell MidCap® Equal Weight Index Total Return  
Prospectus: rr_ProspectusTable  
Index No Deduction for Fees, Expenses, Taxes [Text] rr_IndexNoDeductionForFeesExpensesTaxes (reflects no deduction for fees, expenses or taxes)
Label rr_AverageAnnualReturnLabel Russell MidCap® Equal Weight Index Total Return* (reflects no deduction for fees, expenses or taxes) [2]
1 Year rr_AverageAnnualReturnYear01 (4.95%) [2]
5 Years rr_AverageAnnualReturnYear05 10.80% [2]
Since Inception rr_AverageAnnualReturnSinceInception 11.26% [2]
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 03, 2010 [2]
Guggenheim Broad Market and Sector Equal Weight ETFs | Guggenheim S&P MidCap 400® Equal Weight ETF | Russell MidCap® Index Total Return  
Prospectus: rr_ProspectusTable  
Index No Deduction for Fees, Expenses, Taxes [Text] rr_IndexNoDeductionForFeesExpensesTaxes (reflects no deduction for fees, expenses or taxes)
Label rr_AverageAnnualReturnLabel Russell MidCap® Index Total Return* (reflects no deduction for fees, expenses or taxes) [2]
1 Year rr_AverageAnnualReturnYear01 (2.44%) [2]
5 Years rr_AverageAnnualReturnYear05 11.44% [2]
Since Inception rr_AverageAnnualReturnSinceInception 11.83% [2]
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 03, 2010 [2]
Guggenheim Broad Market and Sector Equal Weight ETFs | Guggenheim S&P MidCap 400® Equal Weight ETF | Guggenheim S&P MidCap 400® Equal Weight ETF  
Prospectus: rr_ProspectusTable  
Trading Symbol dei_TradingSymbol EWMC
Shareholder Fee, Other rr_ShareholderFeeOther none
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.40%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.01%
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 0.41%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 42
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 132
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 230
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 517
Annual Return 2011 rr_AnnualReturn2011 0.09%
Annual Return 2012 rr_AnnualReturn2012 16.31%
Annual Return 2013 rr_AnnualReturn2013 35.03%
Annual Return 2014 rr_AnnualReturn2014 9.95%
Annual Return 2015 rr_AnnualReturn2015 (5.12%)
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Highest Quarter Return
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Mar. 31, 2013
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 13.03%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Lowest Quarter Return
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Sep. 30, 2011
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (19.27%)
Label rr_AverageAnnualReturnLabel Return Before Taxes
1 Year rr_AverageAnnualReturnYear01 (5.12%)
5 Years rr_AverageAnnualReturnYear05 10.39%
Since Inception rr_AverageAnnualReturnSinceInception 10.85%
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 03, 2010
Guggenheim Broad Market and Sector Equal Weight ETFs | Guggenheim S&P MidCap 400® Equal Weight ETF | Guggenheim S&P MidCap 400® Equal Weight ETF | After Taxes on Distributions  
Prospectus: rr_ProspectusTable  
Label rr_AverageAnnualReturnLabel Return After Taxes on Distributions
1 Year rr_AverageAnnualReturnYear01 (5.68%)
5 Years rr_AverageAnnualReturnYear05 9.76%
Since Inception rr_AverageAnnualReturnSinceInception 10.21%
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 03, 2010
Guggenheim Broad Market and Sector Equal Weight ETFs | Guggenheim S&P MidCap 400® Equal Weight ETF | Guggenheim S&P MidCap 400® Equal Weight ETF | After Taxes on Distributions and Sales  
Prospectus: rr_ProspectusTable  
Label rr_AverageAnnualReturnLabel Return After Taxes on Distributions and Sale of Fund Shares
1 Year rr_AverageAnnualReturnYear01 (2.88%)
5 Years rr_AverageAnnualReturnYear05 7.95%
Since Inception rr_AverageAnnualReturnSinceInception 8.33%
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 03, 2010
Guggenheim Broad Market and Sector Equal Weight ETFs | Guggenheim S&P SmallCap 600® Equal Weight ETF  
Prospectus: rr_ProspectusTable  
Risk/Return [Heading] rr_RiskReturnHeading GUGGENHEIM S&P SMALLCAP 600® EQUAL WEIGHT ETF (EWSC)(FORMERLY, GUGGENHEIM RUSSELL 2000® EQUAL WEIGHT ETF)
Objective [Heading] rr_ObjectiveHeading INVESTMENT OBJECTIVE
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock
The investment objective of the Guggenheim S&P SmallCap 600® Equal Weight ETF (the “Fund”) is to correspond as closely as possible, before fees and expenses, to the price and yield performance of the S&P SmallCap 600® Equal Weight Index (the “Underlying Index”).
Expense [Heading] rr_ExpenseHeading FEES AND EXPENSES OF THE FUND
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock
The table below describes the fees and expenses that you may pay if you buy and hold shares of the Fund. Most investors also will incur customary brokerage commissions when buying or selling shares of the Fund, which are not reflected in the table or the Example. If commissions were included in the table and the Example, the costs shown would be higher.
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption Shareholder Fees (fees paid directly from your investment)
Operating Expenses Caption [Text] rr_OperatingExpensesCaption Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading PORTFOLIO TURNOVER
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock
The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in Total Annual Fund Operating Expenses or in the Example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 47% of the average value of its portfolio. However, the Fund’s portfolio turnover rate is calculated without regard to cash instruments, most derivatives and securities received or delivered as a result of in-kind creations and redemptions of the Fund’s shares. If such instruments were included, the Fund’s portfolio turnover rate might be significantly higher.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 47.00%
Expense Exchange Traded Fund Commissions [Text] rr_ExpenseExchangeTradedFundCommissions Most investors also will incur customary brokerage commissions when buying or selling shares of the Fund, which are not reflected in the table or the Example.
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 funds.
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 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:
Strategy [Heading] rr_StrategyHeading PRINCIPAL INVESTMENT STRATEGIES
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock
The Fund invests primarily in equity securities to meet its investment objective of replicating the Underlying Index as closely as possible, before fees and expenses. The S&P SmallCap 600® Equal Weight Index is an unmanaged equal weighted version of the S&P SmallCap 600® Index, which measures the performance of the small-cap segment of the market. The Underlying Index consists of U.S. common equities listed on the New York Stock Exchanges (including NYSE Arca and NYSE Amex) and NASDAQ, and also may include equity interests in real estate investment trusts and business development companies. As of December 31, 2015, the Underlying Index included small-capitalization companies with capitalizations ranging from $57.7 million to $4.6 billion. In general, the equal weighting provided by the Underlying Index provides equal representation for all securities at the Underlying Index’s rebalance interval(s), thereby providing broader exposure to the majority of securities in the Underlying Index than typically may be found in the Underlying Index’s market capitalization weighted counterpart.

The Fund uses a passive management strategy, known as “replication,” to track the performance of the Underlying Index. “Replication” refers to investing in substantially all of the securities in the Underlying Index in approximately the same proportions as in the Underlying Index. Under normal circumstances, the Fund will invest at least 80% of its net assets, plus any borrowings for investment purposes, in the equity securities included in the Underlying Index. The Advisor expects that, over time, the correlation between the Fund’s performance, before fees and expenses, and that of the Underlying Index will be 95% or better. A figure of 100% would indicate perfect correlation. The Advisor monitors the Fund’s tracking of the Underlying Index and seeks to maintain an appropriate correlation. The Advisor rebalances the Fund’s portfolio at the same rebalance interval(s) utilized by the Underlying Index.
 
As long as the Fund invests at least 80% of its total assets in securities included in the Underlying Index, the Fund may hold up to 20% of its assets in investments not included in the Underlying Index, futures contracts, options on futures contracts, options, and swaps related to the Underlying Index, as well as cash and cash equivalents, and shares of investment funds, including money market funds. On a day-to-day basis, the Fund may also hold repurchase agreements, U.S. Government securities or cash equivalents to collateralize its derivatives positions. In an effort to make sure the Fund is fully invested on a day-to-day basis, the Fund may conduct any necessary trading activity at or just prior to the close of the U.S. financial markets.

To the extent the Underlying Index is concentrated in a particular industry the Fund will necessarily be concentrated in that industry. As of the date of this Prospectus, the Fund anticipates that it may have significant exposure to the consumer discretionary, financials, health care, industrials, and information technology sectors. The Fund is non-diversified and, therefore, may invest a greater percentage of its assets in a particular issuer in comparison to a diversified fund.
Risk [Heading] rr_RiskHeading PRINCIPAL RISKS
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock
As with all exchange-traded funds, a shareholder is subject to the risk that his or her investment could lose money. In addition to this risk, the Fund is subject to a number of additional risks that may affect the value or liquidity of its shares, including:

Authorized Participant Concentration Risk—Only an Authorized Participant may engage in creation or redemption transactions directly with the Fund. The Fund has a limited number of institutions that serve as Authorized Participants. To the extent that these institutions exit the business or are unable to proceed with creation and/or redemption orders with respect to the Fund and no other Authorized Participant is able to step forward to create or redeem, Fund shares may trade at a discount to NAV and possibly face delisting.

Correlation and Tracking Error Risk—A number of factors may affect the Fund’s ability to achieve a high degree of correlation with its Underlying Index, and there can be no guarantee that the Fund will achieve a high degree of correlation with its Underlying Index either on a single trading day or for a longer time period. Factors such as Fund expenses, imperfect correlation between the Fund’s investments and the components of the Underlying Index, rounding of share prices, changes to the composition of the Underlying Index, regulatory policies, a high portfolio turnover rate, and the use of leverage all contribute to tracking error and correlation risk. Failure to achieve a high degree of correlation may prevent the Fund from achieving its investment objective and cause the Fund's performance to be less than you expect.
 
Equity Risk—The Fund is subject to the risk that the value of the equity securities and equity-based derivatives, if any, in the Fund’s portfolio will decline due to volatility in the equity market caused by general market and economic conditions, perceptions regarding particular industries represented in the equity market, or factors relating to specific companies to which the Fund has investment exposure.

ETF Trading Risks—An unanticipated closing of the Exchange or one or more markets on which either the Fund’s shares trade or the Fund’s portfolio holdings trade or the inability of such markets to open for trading during normal business hours, such as in response to a natural disaster or other event causing severe market disruption, could result in a shareholder’s inability to buy or sell shares of the Fund and the Fund’s inability to buy and sell exchange-traded portfolio securities during that period, or in a disruption of the Fund’s creation and redemption process, and may make it difficult for the Fund to accurately price its investments thereby potentially affecting the price at which Fund shares trade in the secondary market. All of these events could adversely affect the performance of the Fund. Trading in Fund shares also may be halted by the Exchange or other markets because of market conditions or other reasons. If a trading halt occurs, a shareholder may temporarily be unable to purchase or sell shares of the Fund. Similarly, the Exchange or other markets may issue trading halts on specific securities or derivatives, which will affect the ability of the Fund to buy or sell certain securities or derivatives. In such circumstances, the Fund may be unable to rebalance its portfolio or accurately price its investments and may incur substantial trading losses.

Shares also may trade on the Exchange or on other markets at prices below their NAV. The NAV of shares will fluctuate with changes in the market value of the Fund’s holdings and the exchange-traded prices of the Fund's shares may not reflect these market values. Although the Fund’s shares are currently listed on the Exchange, there can be no assurance that an active trading market for shares will develop or be maintained.

Liquidity and Valuation Risk—In certain circumstances, it may be difficult for the Fund to purchase and sell a particular investment within a reasonable time at a fair price, or the price at which it has been valued by the Advisor for purposes of the Fund’s NAV, causing the Fund to be less liquid. In addition, the ability of the Fund to assign an accurate daily value to certain investments may be difficult, and the Advisor may be required to fair value the investments.

Market Risk—The Fund's investments in equity securities and derivatives, in general, are subject to market risks that may cause their prices, and therefore the Fund's NAV, to fluctuate over time. Markets are subject to political, regulatory, economic and financial market risks.

Mid-Capitalization Securities Risk—The Fund is subject to the risk that medium-capitalization stocks may underperform other segments of the equity market or the equity market as a whole. Securities of medium-capitalization companies may experience more price volatility, greater spreads between their bid and ask prices, lower trading volumes, and cyclical or static growth prospects. Medium-capitalization companies often have limited product lines, markets or financial resources, and may therefore be more vulnerable to adverse developments than larger capitalization companies.

Non-Diversification Risk—The Fund is considered non-diversified and can invest a greater portion of its assets in securities of individual issuers than a diversified fund. As a result, changes in the market value of a single issuer could cause greater fluctuations in the value of Fund shares than would occur in a diversified fund.

Passive Investment Risk—The Fund is not actively managed and the Advisor does not attempt to take defensive positions in declining markets. Therefore, the Fund may be subject to greater losses in a declining market than a fund that is actively managed.

Sector Risk—The Sector Risk applicable to the Fund is as follows:

Consumer Discretionary Sector Risk. The Fund's investments are exposed to issuers conducting business in the consumer discretionary sector. The Fund is subject to the risk that the securities of such issuers will underperform the market as a whole due to legislative or regulatory changes, adverse market conditions and/or increased competition affecting the consumer discretionary sector. The performance of consumer discretionary companies has historically been closely tied to the performance of the overall economy, and is also affected by interest rates, consumer confidence and spending.

Financials Sector Risk. The Fund's investments are exposed to issuers conducting business in the financials sector. The Fund is subject to the risk that the securities of such issuers will underperform the market as a whole due to legislative or regulatory changes, adverse market conditions and/or increased competition affecting the financials sector. Financials companies are subject to extensive government regulation, which may limit the financial commitments they can make and the interest rates and fees they can charge. Profitability is largely dependent on the availability and cost of capital funds, and can fluctuate significantly when interest rates change or due to increased competition.

Health Care Sector Risk. The Fund's investments are exposed to issuers conducting business in the health care sector. The Fund is subject to the risk that the securities of such issuers will underperform the market as a whole due to legislative or regulatory changes, adverse market conditions and/or increased competition affecting the health care sector. The prices of the securities of health care sector companies are closely tied to government regulation and approval of their products and services, which can have a significant effect on the price and availability of those products and services.

Industrials Sector Risk. The Fund's investments are exposed to issuers conducting business in the industrials sector. The Fund is subject to the risk that the securities of such issuers will underperform the market as a whole due to legislative or regulatory changes, adverse market conditions and/or increased competition affecting the industrials sector. The prices of the securities of industrials companies may fluctuate due to the level and volatility of commodity prices, the exchange value of the dollar, import controls, worldwide competition, liability for environmental damage, depletion of resources, and mandated expenditures for safety and pollution control devices.

Information Technology Sector Risk. The Fund's investments are exposed to issuers conducting business in the information technology sector. The Fund is subject to the risk that the securities of such issuers will underperform the market as a whole due to legislative or regulatory changes, adverse market conditions and/or increased competition affecting the information technology sector. The prices of the securities of information technology companies are closely tied to market competition, increased sensitivity to short product cycles and aggressive pricing, and problems with bringing products to market.

Small-Capitalization Securities Risk—The Fund is subject to the risk that small-capitalization stocks may underperform other segments of the equity market or the equity market as a whole. Small-capitalization companies may be more vulnerable than larger, more established organizations to adverse business or economic developments. Securities of small-capitalization companies may experience much more price volatility, greater spreads between their bid and ask prices, significantly lower trading volumes, and cyclical or static growth prospects. Small-capitalization companies often have limited product lines, markets or financial resources, and may therefore be more vulnerable to adverse developments than larger capitalization companies.
Risk Lose Money [Text] rr_RiskLoseMoney As with all exchange-traded funds, a shareholder is subject to the risk that his or her investment could lose money.
Risk Nondiversified Status [Text] rr_RiskNondiversifiedStatus Non-Diversification Risk—The Fund is considered non-diversified and can invest a greater portion of its assets in securities of individual issuers than a diversified fund. As a result, changes in the market value of a single issuer could cause greater fluctuations in the value of Fund shares than would occur in a diversified fund.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading PERFORMANCE INFORMATION
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock
The following bar chart shows the performance of the shares of the Fund from year to year. The variability of performance over time provides an indication of the risks of investing in the Fund. The following table shows the performance of the shares of the Fund as an average over different periods of time in comparison to the performance of the Underlying Index and the S&P SmallCap 600® Index, which is the market capitalization weighted version of the Underlying Index. The table below also includes the Fund's previous underlying index and its market capitalization weighted counterpart. Effective January 26, 2016, the Fund adopted its current investment objective. Prior to January 26, 2016, the Fund sought to correspond as closely as possible, before fees and expenses, to the price and yield performance of the Russell 2000® Equal Weight Index Total Return. The performance and average annual total returns shown for periods prior to January 26, 2016 would have differed had the Fund's current investment objective been in effect during those periods. The past performance of both the S&P SmallCap 600® Equal Weight Index and the Russell 2000® Equal Weight Index Total Return is shown in the Average Annual Total Returns table below. The figures in the bar chart and table assume the reinvestment of dividends and capital gains distributions. Of course, this past performance (before and after taxes) does not necessarily indicate how the Fund will perform in the future.

Updated performance information is available on the Fund’s website at guggenheiminvestments.com or by calling Guggenheim Investments Client Services at 800.820.0888.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The following bar chart shows the performance of the shares of the Fund from year to year. The variability of performance over time provides an indication of the risks of investing in the Fund. The following table shows the performance of the shares of the Fund as an average over different periods of time in comparison to the performance of the Underlying Index and the S&P SmallCap 600® Index, which is the market capitalization weighted version of the Underlying Index.
Performance Availability Phone [Text] rr_PerformanceAvailabilityPhone 800.820.0888
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress guggenheiminvestments.com
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Of course, this past performance (before and after taxes) does not necessarily indicate how the Fund will perform in the future.
Bar Chart [Heading] rr_BarChartHeading The performance information shown below is based on a calendar year.
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock
Highest Quarter Return
 
Lowest Quarter Return
Q4 2011
14.89%
 
Q3 2011
-22.67%
Performance Table Heading rr_PerformanceTableHeading AVERAGE ANNUAL TOTAL RETURN (for periods ended December 31, 2015)
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate The after-tax returns presented in the table below are calculated using highest historical individual federal marginal income tax rates and do not reflect the impact of state and local taxes.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred Your actual after-tax returns will depend on your specific tax situation and may differ from those shown below. After-tax returns are not relevant to investors who hold shares of the Fund through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts (“IRAs”).
Performance Table Narrative rr_PerformanceTableNarrativeTextBlock
The after-tax returns presented in the table below are calculated using highest historical individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Your actual after-tax returns will depend on your specific tax situation and may differ from those shown below. After-tax returns are not relevant to investors who hold shares of the Fund through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts (“IRAs”).
Guggenheim Broad Market and Sector Equal Weight ETFs | Guggenheim S&P SmallCap 600® Equal Weight ETF | S&P SmallCap 600® Equal Weight Index  
Prospectus: rr_ProspectusTable  
Index No Deduction for Fees, Expenses, Taxes [Text] rr_IndexNoDeductionForFeesExpensesTaxes (reflects no deduction for fees, expenses or taxes)
Label rr_AverageAnnualReturnLabel S&P SmallCap 600® Equal Weight Index (reflects no deduction for fees, expenses or taxes)
1 Year rr_AverageAnnualReturnYear01 (6.33%)
5 Years rr_AverageAnnualReturnYear05 10.17%
Since Inception rr_AverageAnnualReturnSinceInception 10.99%
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 03, 2010
Guggenheim Broad Market and Sector Equal Weight ETFs | Guggenheim S&P SmallCap 600® Equal Weight ETF | S&P SmallCap 600® Index  
Prospectus: rr_ProspectusTable  
Index No Deduction for Fees, Expenses, Taxes [Text] rr_IndexNoDeductionForFeesExpensesTaxes (reflects no deduction for fees, expenses or taxes)
Label rr_AverageAnnualReturnLabel S&P SmallCap 600® Index (reflects no deduction for fees, expenses or taxes)
1 Year rr_AverageAnnualReturnYear01 (1.97%)
5 Years rr_AverageAnnualReturnYear05 11.48%
Since Inception rr_AverageAnnualReturnSinceInception 12.07%
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 03, 2010
Guggenheim Broad Market and Sector Equal Weight ETFs | Guggenheim S&P SmallCap 600® Equal Weight ETF | Russell 2000® Equal Weight Index Total Return  
Prospectus: rr_ProspectusTable  
Index No Deduction for Fees, Expenses, Taxes [Text] rr_IndexNoDeductionForFeesExpensesTaxes (reflects no deduction for fees, expenses or taxes)
Label rr_AverageAnnualReturnLabel Russell 2000® Equal Weight Index Total Return* (reflects no deduction for fees, expenses or taxes) [3]
1 Year rr_AverageAnnualReturnYear01 (10.12%) [3]
5 Years rr_AverageAnnualReturnYear05 6.54% [3]
Since Inception rr_AverageAnnualReturnSinceInception 7.47% [3]
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 03, 2010 [3]
Guggenheim Broad Market and Sector Equal Weight ETFs | Guggenheim S&P SmallCap 600® Equal Weight ETF | Russell 2000® Index Total Return  
Prospectus: rr_ProspectusTable  
Index No Deduction for Fees, Expenses, Taxes [Text] rr_IndexNoDeductionForFeesExpensesTaxes (reflects no deduction for fees, expenses or taxes)
Label rr_AverageAnnualReturnLabel Russell 2000® Index Total Return * (reflects no deduction for fees, expenses or taxes) [3]
1 Year rr_AverageAnnualReturnYear01 (4.41%) [3]
5 Years rr_AverageAnnualReturnYear05 9.19% [3]
Since Inception rr_AverageAnnualReturnSinceInception 9.83% [3]
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 03, 2010 [3]
Guggenheim Broad Market and Sector Equal Weight ETFs | Guggenheim S&P SmallCap 600® Equal Weight ETF | Guggenheim S&P SmallCap 600® Equal Weight ETF  
Prospectus: rr_ProspectusTable  
Trading Symbol dei_TradingSymbol EWSC
Shareholder Fee, Other rr_ShareholderFeeOther none
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.40%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.01%
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 0.41%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 42
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 132
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 230
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 517
Annual Return 2011 rr_AnnualReturn2011 (6.52%)
Annual Return 2012 rr_AnnualReturn2012 13.32%
Annual Return 2013 rr_AnnualReturn2013 40.53%
Annual Return 2014 rr_AnnualReturn2014 0.74%
Annual Return 2015 rr_AnnualReturn2015 (10.29%)
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Highest Quarter Return
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Dec. 31, 2011
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 14.89%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Lowest Quarter Return
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Sep. 30, 2011
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (22.67%)
Label rr_AverageAnnualReturnLabel Return Before Taxes
1 Year rr_AverageAnnualReturnYear01 (10.29%)
5 Years rr_AverageAnnualReturnYear05 6.11%
Since Inception rr_AverageAnnualReturnSinceInception 7.02%
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 03, 2010
Guggenheim Broad Market and Sector Equal Weight ETFs | Guggenheim S&P SmallCap 600® Equal Weight ETF | Guggenheim S&P SmallCap 600® Equal Weight ETF | After Taxes on Distributions  
Prospectus: rr_ProspectusTable  
Label rr_AverageAnnualReturnLabel Return After Taxes on Distributions
1 Year rr_AverageAnnualReturnYear01 (10.74%)
5 Years rr_AverageAnnualReturnYear05 5.64%
Since Inception rr_AverageAnnualReturnSinceInception 6.55%
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 03, 2010
Guggenheim Broad Market and Sector Equal Weight ETFs | Guggenheim S&P SmallCap 600® Equal Weight ETF | Guggenheim S&P SmallCap 600® Equal Weight ETF | After Taxes on Distributions and Sales  
Prospectus: rr_ProspectusTable  
Label rr_AverageAnnualReturnLabel Return After Taxes on Distributions and Sale of Fund Shares
1 Year rr_AverageAnnualReturnYear01 (5.81%)
5 Years rr_AverageAnnualReturnYear05 4.57%
Since Inception rr_AverageAnnualReturnSinceInception 5.30%
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 03, 2010
Guggenheim Broad Market and Sector Equal Weight ETFs | Guggenheim MSCI Emerging Markets Equal Weight ETF  
Prospectus: rr_ProspectusTable  
Risk/Return [Heading] rr_RiskReturnHeading GUGGENHEIM MSCI EMERGING MARKETS EQUAL COUNTRY WEIGHT ETF (EWEM)
Objective [Heading] rr_ObjectiveHeading INVESTMENT OBJECTIVE
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock
The investment objective of the Guggenheim MSCI Emerging Markets Equal Country Weight ETF (the “Fund”) is to correspond, before fees and expenses, to the price and yield performance of the MSCI Emerging Markets Equal Country Weighted Index (the “Underlying Index”).
Expense [Heading] rr_ExpenseHeading FEES AND EXPENSES OF THE FUND
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock
The table below describes the fees and expenses that you may pay if you buy and hold shares of the Fund. Most investors also will incur customary brokerage commissions when buying or selling shares of the Fund, which are not reflected in the table or the Example. If commissions were included in the table and the Example, the costs shown would be higher.
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption Shareholder Fees (fees paid directly from your investment)
Operating Expenses Caption [Text] rr_OperatingExpensesCaption Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination at least twelve months from the date of this Prospectus.
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 Fund shares are held in a taxable account. These costs, which are not reflected in Total Annual Fund Operating Expenses or in the Example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 99% of the average value of its portfolio. However, the Fund’s portfolio turnover rate is calculated without regard to cash instruments, most derivatives and securities received or delivered as a result of in-kind creations and redemptions of the Fund’s shares. If such instruments were included, the Fund’s portfolio turnover rate might be significantly higher.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 99.00%
Expense Exchange Traded Fund Commissions [Text] rr_ExpenseExchangeTradedFundCommissions Most investors also will incur customary brokerage commissions when buying or selling shares of the Fund, which are not reflected in the table or the Example.
Expenses Not Correlated to Ratio Due to Acquired Fund Fees [Text] rr_ExpensesNotCorrelatedToRatioDueToAcquiredFundFees The Total Annual Fund Operating Expenses (before and after any fee waivers and/or expense reimbursements) in this fee table may not correlate to the expense ratios in the Fund’s financial highlights and financial statements because the financial highlights and financial statements reflect only the operating expenses of the Fund and do not include Acquired Fund Fees and Expenses, which are fees and expenses incurred indirectly by the Fund through its investments in certain underlying investment companies.
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 funds.
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 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 (including one year of capped expenses each period) 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 primarily in equity securities to meet its investment objective of corresponding to the Underlying Index as closely as possible, before fees and expenses. The Underlying Index is based on the universe of constituents of the MSCI Emerging Markets Index. The Underlying Index provides equal weighted exposure to all of the countries included in the MSCI Emerging Markets Index while providing capitalization weighted exposure to the securities within each country. The MSCI Emerging Markets Index is a free float-adjusted market capitalization index that is designed to measure equity market performance of certain markets deemed to be emerging markets. As of December 31, 2015, the MSCI Emerging Markets Index consisted of the following 23 emerging market country indices: Brazil, Chile, China, Colombia, Czech Republic, Egypt, Greece, Hungary, India, Indonesia, Korea, Malaysia, Mexico, Peru, Philippines, Poland, Qatar, Russia, South Africa, Taiwan, Thailand, Turkey and United Arab Emirates with capitalizations ranging from $18.4 million to $231.2 billion. Both Indices are denominated in U.S. dollars. In general, the equal-weighting employed by the Underlying Index provides equal representation of the countries included in the Underlying Index at the Underlying Index’s rebalance interval(s), thereby providing broader exposure to those countries than typically may be found in the Underlying Index’s market capitalization weighted counterparts while the capitalization weighting of the securities within each country provides for greater diversification.

The Fund uses a passive management strategy, known as “representative sampling,” to track the performance of the Underlying Index. “Representative sampling” refers to an indexing strategy that generally involves investing in a representative sample of securities, including shares of other investment companies and common stock, or financial instruments, primarily consisting of American Depositary Receipts (“ADRs”) and Global Depositary Receipts (“GDRs”), that has an investment profile similar to the Underlying Index and some, but not all, of the component securities of the Underlying Index. Under normal circumstances, the Fund will invest at least 80% of its net assets, plus any borrowings for investment purposes, in the equity securities included in the Underlying Index. The Advisor expects that, over time, the correlation between the Fund’s performance, before fees and expenses, and that of the Underlying Index will be 95% or better. A figure of 100% would indicate perfect correlation. The Advisor monitors the Fund’s tracking of the Underlying Index and seeks to maintain an appropriate correlation. The Advisor rebalances the Fund’s portfolio at the same rebalance interval(s) utilized by the Underlying Index.

As long as the Fund invests at least 80% of its total assets in securities representative of the Underlying Index, the Fund may hold up to 20% of its assets in investments not included in or representative of the Underlying Index, futures contracts, options on futures contracts, options, and swaps related to the Underlying Index, as well as cash and cash equivalents. On a day-to-day basis, the Fund may also hold repurchase agreements, U.S. Government securities or cash equivalents to collateralize its derivatives positions. In an effort to make sure the Fund is fully invested on a day-to-day basis, the Fund may conduct any necessary trading activity at or just prior to the close of the U.S. financial markets.

The Fund may also seek to obtain exposure to the securities in which it primarily invests through a variety of investment vehicles, including closed-end funds, exchange-traded funds (“ETFs”) and mutual or other investment funds.

To the extent the Underlying Index is concentrated in a particular industry the Fund will necessarily be concentrated in that industry. As of the date of this Prospectus, the Underlying Index components and thus the Fund's assets, are concentrated in the banking industry or group of industries, as applicable. The Fund is non-diversified and, therefore, may invest a greater percentage of its assets in a particular issuer in comparison to a diversified fund.

Risk [Heading] rr_RiskHeading PRINCIPAL RISKS
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock
As with all ETFs, a shareholder is subject to the risk that his or her investment could lose money. In addition to this risk, the Fund is subject to a number of additional risks that may affect the value or liquidity of its shares, including:

Authorized Participant Concentration Risk—Only an Authorized Participant may engage in creation or redemption transactions directly with the Fund. The Fund has a limited number of institutions that serve as Authorized Participants. To the extent that these institutions exit the business or are unable to proceed with creation and/or redemption orders with respect to the Fund and no other Authorized Participant is able to step forward to create or redeem, Fund shares may trade at a discount to NAV and possibly face delisting.

Banking Industry Concentration Risk—To the extent that the Fund's investments are concentrated in issuers conducting business in the banking industry, the Fund is subject to the risk that the securities of such issuers will underperform the market as a whole due to legislative or regulatory changes, adverse market conditions and/or increased competition affecting the banking industry. The prices of securities of banking companies also may fluctuate widely in response to such events.

Correlation and Tracking Error Risk—A number of factors may affect the Fund’s ability to achieve a high degree of correlation with its Underlying Index, and there can be no guarantee that the Fund will achieve a high degree of correlation with its Underlying Index either on a single trading day or for a longer time period. Factors such as Fund expenses, imperfect correlation between the Fund’s investments and the components of the Underlying Index, rounding of share prices, changes to the composition of the Underlying Index, regulatory policies, a high portfolio turnover rate, and the use of leverage all contribute to tracking error and correlation risk. Failure to achieve a high degree of correlation may prevent the Fund from achieving its investment objective and cause the Fund's performance to be less than you expect.

Currency Risk—The Fund’s indirect and direct exposure to foreign currencies subjects the Fund to the risk that those currencies will decline in value relative to the U.S. dollar, or, in the case of short positions, that the U.S. dollar will decline in value relative to the currency being hedged. The Fund also may incur transaction costs in connection with conversions between various currencies.

Depositary Receipt Risk—The Fund may hold the securities of non-U.S. companies in the form of ADRs and GDRs. The underlying securities of the ADRs and GDRs in the Fund’s portfolio are subject to fluctuations in foreign currency exchange rates that may affect the value of the Fund’s portfolio. In addition, the value of the securities underlying the ADRs and GDRs may change materially when the U.S. markets are not open for trading. Investments in the underlying foreign securities also involve political and economic risks distinct from those associated with investing in the securities of U.S. issuers.

Emerging Markets Risk—The Fund’s investments will have exposure to emerging markets. Emerging markets can be subject to greater social, economic, regulatory, and political uncertainties and can be extremely volatile because they are countries with low- to middle-income economies as classified by the World Bank, and other countries or markets with similar characteristics as determined by the Advisor.

Equity Risk—The Fund is subject to the risk that the value of the equity securities and equity-based derivatives, if any, in the Fund’s portfolio will decline due to volatility in the equity market caused by general market and economic conditions, perceptions regarding particular industries represented in the equity market, or factors relating to specific companies to which the Fund has investment exposure.

ETF Trading Risks—An unanticipated closing of the Exchange or one or more markets on which either the Fund’s shares trade or the Fund’s portfolio holdings trade or the inability of such markets to open for trading during normal business hours, such as in response to a natural disaster or other event causing severe market disruption, could result in a shareholder’s inability to buy or sell shares of the Fund and the Fund’s inability to buy and sell exchange-traded portfolio securities during that period, or in a disruption of the Fund’s creation and redemption process, and may make it difficult for the Fund to accurately price its investments thereby potentially affecting the price at which Fund shares trade in the secondary market. All of these events could adversely affect the performance of the Fund. Trading in Fund shares also may be halted by the Exchange or other markets because of market conditions or other reasons. If a trading halt occurs, a shareholder may temporarily be unable to purchase or sell shares of the Fund. Similarly, the Exchange or other markets may issue trading halts on specific securities or derivatives, which will affect the ability of the Fund to buy or sell certain securities or derivatives. In such circumstances, the Fund may be unable to rebalance its portfolio or accurately price its investments and may incur substantial trading losses.

Shares also may trade on the Exchange or on other markets at prices below their NAV. The NAV of shares will fluctuate with changes in the market value of the Fund’s holdings and the exchange-traded prices of the Fund's shares may not reflect these market values. Although the Fund’s shares are currently listed on the Exchange, there can be no assurance that an active trading market for shares will develop or be maintained.

Foreign Issuer Exposure Risk—The Fund may invest in securities of foreign companies directly, or in financial instruments that are indirectly linked to the performance of foreign issuers. The Fund’s investments in foreign securities and foreign issuers are subject to additional risks in comparison to U.S. securities and U.S. issuers, including currency fluctuations, adverse political and economic developments, unreliable or untimely information, less liquidity, limited legal recourse and higher transactional costs.

Geographic Concentration Risk—To the extent that the Fund’s investments are concentrated in a particular country or region, the Fund will be susceptible to loss due to adverse market, political, regulatory, and geographic events affecting that country or region. The Fund’s exposure generally will be concentrated in a particular country or region to the same extent as the Underlying Index. The Fund has concentrated investment exposure to the countries or regions listed below.

Asia. While certain Asian economies are exemplars of growth and development others have been and continue to be subject, to some extent, to over-extension of credit, currency devaluations and restrictions, high unemployment, high inflation, decreased exports and economic recessions.

Eastern Europe. Investing in securities of Eastern European issuers involves significant risks, including legal, regulatory, political and economic risks specific to Eastern Europe.  In general, Eastern European countries are in the early stages of industrial and economic development and the securities markets in those countries may be substantially smaller, less liquid and more volatile than securities markets in developed countries. In addition, few issuers may represent a large percentage of a particular Eastern European country’s market. Eastern European countries may include countries that were, until recently, governed by communist governments or countries that have failed to achieve economic growth and development typical of developed European countries. In addition, the success of the Eastern European economy may depend, in large part, on the economic health of Western European countries and the European Union as a whole.

Latin America. Investing in Latin American issuers involves significant risks, including legal, regulatory, political and economic risks specific to Latin America. The economies of certain Latin American countries have experienced considerable difficulties in the past and have often lacked stable economic, political and social conditions necessary to promote successful securities markets. Factors affecting the stability of the Latin American markets include, but are not limited to, high inflation and high interest rates, economic volatility, currency devaluations, government debt defaults, high unemployment rates and social unrest. International economic conditions, particularly those in the United States, Europe and Asia, as well as world prices for oil and other commodities may also influence the development of Latin American economies.

Investing in each of these countries or regions is usually considered riskier than investing in U.S. assets. It is also more volatile.

Investment in Investment Vehicles Risk—Investing in other investment vehicles, including, ETFs, closed-end funds, affiliated short-term fixed-income funds and other mutual funds, subjects the Fund to those risks affecting the investment vehicle, including the possibility that the value of the underlying securities held by the investment vehicle could decrease. Moreover, the Fund will incur its pro rata share of the expenses of the underlying investment vehicles’ expenses. Consequently, an investment in the Fund entails more direct and indirect expenses than a direct investment in the underlying investment vehicles.

Large-Capitalization Securities Risk—The Fund is subject to the risk that large-capitalization stocks may underperform other segments of the equity market or the equity market as a whole. Larger, more established companies may be unable to respond quickly to new competitive challenges such as changes in technology and may not be able to attain the high growth rate of smaller companies, especially during extended periods of economic expansion.

Liquidity and Valuation Risk—In certain circumstances, it may be difficult for the Fund to purchase and sell a particular investment within a reasonable time at a fair price, or the price at which it has been valued by the Advisor for purposes of the Fund’s NAV, causing the Fund to be less liquid. In addition, the ability of the Fund to assign an accurate daily value to certain investments may be difficult, and the Advisor may be required to fair value the investments.

Market Risk—The Fund's investments in equity securities and derivatives, in general, are subject to market risks that may cause their prices, and therefore the Fund's NAV, to fluctuate over time. Markets are subject to political, regulatory, economic and financial market risks.

Mid-Capitalization Securities Risk—The Fund is subject to the risk that medium-capitalization stocks may underperform other segments of the equity market or the equity market as a whole. Securities of medium-capitalization companies may experience more price volatility, greater spreads between their bid and ask prices, lower trading volumes, and cyclical or static growth prospects. Medium-capitalization companies often have limited product lines, markets or financial resources, and may therefore be more vulnerable to adverse developments than larger capitalization companies.

Non-Diversification Risk—The Fund is considered non-diversified and can invest a greater portion of its assets in securities of individual issuers than a diversified fund. As a result, changes in the market value of a single issuer could cause greater fluctuations in the value of Fund shares than would occur in a diversified fund.

Passive Investment Risk—The Fund is not actively managed and the Advisor does not attempt to take defensive positions in declining markets. Therefore, the Fund may be subject to greater losses in a declining market than a fund that is actively managed.
Risk Lose Money [Text] rr_RiskLoseMoney As with all ETFs, a shareholder is subject to the risk that his or her investment could lose money.
Risk Nondiversified Status [Text] rr_RiskNondiversifiedStatus Non-Diversification Risk—The Fund is considered non-diversified and can invest a greater portion of its assets in securities of individual issuers than a diversified fund. As a result, changes in the market value of a single issuer could cause greater fluctuations in the value of Fund shares than would occur in a diversified fund.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading PERFORMANCE INFORMATION
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock
The following bar chart shows the performance of the shares of the Fund from year to year. The variability of performance over time provides an indication of the risks of investing in the Fund. The following table shows the performance of the shares of the Fund as an average over different periods of time in comparison to the performance of the Underlying Index and the MSCI Emerging Markets Index, on which the Underlying Index is based. Effective January 20, 2015, the Fund adopted its current investment objective. Prior to January 20, 2015, the Fund sought to correspond, before fees and expenses, to the price and yield performance of the MSCI Emerging Markets Equal Weighted Index (Net).  The performance and average annual total returns shown for periods prior to January 20, 2015 would have differed had the Fund’s current investment objective been in effect during those periods. The figures in the bar chart and table assume the reinvestment of dividends and capital gains distributions. Of course, this past performance (before and after taxes) does not necessarily indicate how the Fund will perform in the future.

Updated performance information is available on the Fund’s website at guggenheiminvestments.com or by calling Guggenheim Investments Client Services at 800.820.0888.

Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The following bar chart shows the performance of the shares of the Fund from year to year. The variability of performance over time provides an indication of the risks of investing in the Fund. The following table shows the performance of the shares of the Fund as an average over different periods of time in comparison to the performance of the Underlying Index and the MSCI Emerging Markets Index, on which the Underlying Index is based.
Performance Availability Phone [Text] rr_PerformanceAvailabilityPhone 800.820.0888
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress guggenheiminvestments.com
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Of course, this past performance (before and after taxes) does not necessarily indicate how the Fund will perform in the future.
Bar Chart [Heading] rr_BarChartHeading The performance information shown below is based on a calendar year.
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock
Highest Quarter Return
 
Lowest Quarter Return
Q1 2012
15.00%
 
Q3 2011
-25.16%
Performance Table Heading rr_PerformanceTableHeading AVERAGE ANNUAL TOTAL RETURN (for periods ended December 31, 2015)
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate The after-tax returns presented in the table below are calculated using highest historical individual federal marginal income tax rates and do not reflect the impact of state and local taxes.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred Your actual after-tax returns will depend on your specific tax situation and may differ from those shown below. After-tax returns are not relevant to investors who hold shares of the Fund through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts (“IRAs”).
Performance Table Narrative rr_PerformanceTableNarrativeTextBlock
The after-tax returns presented in the table below are calculated using highest historical individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Your actual after-tax returns will depend on your specific tax situation and may differ from those shown below. After-tax returns are not relevant to investors who hold shares of the Fund through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts (“IRAs”).
Guggenheim Broad Market and Sector Equal Weight ETFs | Guggenheim MSCI Emerging Markets Equal Weight ETF | MSCI Emerging Markets Equal Weighted Index  
Prospectus: rr_ProspectusTable  
Index No Deduction for Fees, Expenses, Taxes [Text] rr_IndexNoDeductionForFeesExpensesTaxes (reflects no deduction for fees, expenses or taxes)
Guggenheim Broad Market and Sector Equal Weight ETFs | Guggenheim MSCI Emerging Markets Equal Weight ETF | MSCI Emerging Markets Equal Country Weighted Index  
Prospectus: rr_ProspectusTable  
Index No Deduction for Fees, Expenses, Taxes [Text] rr_IndexNoDeductionForFeesExpensesTaxes (reflects no deduction for fees, expenses or taxes)
Label rr_AverageAnnualReturnLabel MSCI Emerging Markets Equal Country Weighted Index* (reflects no deduction for fees, expenses or taxes) [4]
1 Year rr_AverageAnnualReturnYear01 (19.15%) [4]
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 03, 2010 [4]
Guggenheim Broad Market and Sector Equal Weight ETFs | Guggenheim MSCI Emerging Markets Equal Weight ETF | MSCI Emerging Markets Index  
Prospectus: rr_ProspectusTable  
Index No Deduction for Fees, Expenses, Taxes [Text] rr_IndexNoDeductionForFeesExpensesTaxes (reflects no deduction for fees, expenses or taxes)
Label rr_AverageAnnualReturnLabel MSCI Emerging Markets Index **(reflects no deduction for fees, expenses or taxes) [5]
1 Year rr_AverageAnnualReturnYear01 (14.92%) [5]
5 Years rr_AverageAnnualReturnYear05 (4.81%) [5]
Since Inception rr_AverageAnnualReturnSinceInception (4.23%) [5]
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 03, 2010 [5]
Guggenheim Broad Market and Sector Equal Weight ETFs | Guggenheim MSCI Emerging Markets Equal Weight ETF | Guggenheim MSCI Emerging Markets Equal Weight ETF  
Prospectus: rr_ProspectusTable  
Trading Symbol dei_TradingSymbol EWEM
Shareholder Fee, Other rr_ShareholderFeeOther none
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.70%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets none [6]
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.06%
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 0.76% [7]
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.06%) [8]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 0.70%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 72
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 237
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 416
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 937
Annual Return 2011 rr_AnnualReturn2011 (23.61%)
Annual Return 2012 rr_AnnualReturn2012 18.39%
Annual Return 2013 rr_AnnualReturn2013 (5.37%)
Annual Return 2014 rr_AnnualReturn2014 (0.81%)
Annual Return 2015 rr_AnnualReturn2015 (19.64%)
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Highest Quarter Return
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Mar. 31, 2012
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 15.00%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Lowest Quarter Return
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Sep. 30, 2011
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (25.16%)
Label rr_AverageAnnualReturnLabel Return Before Taxes
1 Year rr_AverageAnnualReturnYear01 (19.64%)
5 Years rr_AverageAnnualReturnYear05 (7.36%)
Since Inception rr_AverageAnnualReturnSinceInception (6.93%)
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 03, 2010
Guggenheim Broad Market and Sector Equal Weight ETFs | Guggenheim MSCI Emerging Markets Equal Weight ETF | Guggenheim MSCI Emerging Markets Equal Weight ETF | After Taxes on Distributions  
Prospectus: rr_ProspectusTable  
Label rr_AverageAnnualReturnLabel Return After Taxes on Distributions
1 Year rr_AverageAnnualReturnYear01 (20.37%)
5 Years rr_AverageAnnualReturnYear05 (8.03%)
Since Inception rr_AverageAnnualReturnSinceInception (7.59%)
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 03, 2010
Guggenheim Broad Market and Sector Equal Weight ETFs | Guggenheim MSCI Emerging Markets Equal Weight ETF | Guggenheim MSCI Emerging Markets Equal Weight ETF | After Taxes on Distributions and Sales  
Prospectus: rr_ProspectusTable  
Label rr_AverageAnnualReturnLabel Return After Taxes on Distributions and Sale of Fund Shares
1 Year rr_AverageAnnualReturnYear01 (11.04%)
5 Years rr_AverageAnnualReturnYear05 (5.58%)
Since Inception rr_AverageAnnualReturnSinceInception (5.27%)
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 03, 2010
Guggenheim Broad Market and Sector Equal Weight ETFs | Guggenheim S&P 500® Equal Weight Consumer Discretionary ETF  
Prospectus: rr_ProspectusTable  
Risk/Return [Heading] rr_RiskReturnHeading GUGGENHEIM S&P 500® EQUAL WEIGHT CONSUMER DISCRETIONARY ETF (RCD)
Objective [Heading] rr_ObjectiveHeading INVESTMENT OBJECTIVE
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock
The investment objective of the Guggenheim S&P 500® Equal Weight Consumer Discretionary ETF (the “Fund”) is to replicate as closely as possible, before fees and expenses, the performance of the S&P 500® Equal Weight Index Consumer Discretionary Total Return (the “Underlying Index”).
Expense [Heading] rr_ExpenseHeading FEES AND EXPENSES OF THE FUND
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock
The table below describes the fees and expenses that you may pay if you buy and hold shares of the Fund. Most investors also will incur customary brokerage commissions when buying or selling shares of the Fund, which are not reflected in the table or the Example. If commissions were included in the table and the Example, the costs shown would be higher.
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption Shareholder Fees (fees paid directly from your investment)
Operating Expenses Caption [Text] rr_OperatingExpensesCaption Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading PORTFOLIO TURNOVER
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock
The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in Total Annual Fund Operating Expenses or in the Example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 23% of the average value of its portfolio. However, the Fund’s portfolio turnover rate is calculated without regard to cash instruments, most derivatives and securities received or delivered as a result of in-kind creations and redemptions of the Fund’s shares. If such instruments were included, the Fund’s portfolio turnover rate might be significantly higher.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 23.00%
Expense Exchange Traded Fund Commissions [Text] rr_ExpenseExchangeTradedFundCommissions Most investors also will incur customary brokerage commissions when buying or selling shares of the Fund, which are not reflected in the table or the Example.
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 funds.
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 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:
Strategy [Heading] rr_StrategyHeading PRINCIPAL INVESTMENT STRATEGIES
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock
The Fund invests primarily in equity securities to meet its investment objective of replicating the Underlying Index as closely as possible, before fees and expenses. The Underlying Index is an unmanaged equal weighted version of the S&P 500® Consumer Discretionary Index that consists of the common stocks of the following industries: automobiles and components, consumer durables, apparel, hotels, restaurants, leisure, media and retailing that comprise the Consumer Discretionary sector of the S&P 500® Index. As of December 31, 2015, the Underlying Index included companies with a capitalization range of $1.7 billion to $317 billion. In general, the equal weighting provided by the Underlying Index provides equal representation for all securities at the Underlying Index’s rebalance interval(s), thereby providing broader exposure to the majority of securities in the Underlying Index than typically may be found in the Underlying Index’s market capitalization weighted counterpart.

The Fund uses a passive management strategy, known as “replication,” to track the performance of the Underlying Index. “Replication” refers to investing in substantially all of the securities in the Underlying Index in approximately the same proportions as in the Underlying Index. Under normal circumstances, the Fund will invest at least 90% of its net assets, plus any borrowings for investment purposes, in the equity securities included in the Underlying Index. The Advisor expects that, over time, the correlation between the Fund’s performance and that of the Underlying Index, before fees and expenses, will be 95% or better. A figure of 100% would indicate perfect correlation. The Advisor monitors the Fund’s tracking of the Underlying Index and seeks to maintain an appropriate correlation. The Advisor rebalances the Fund’s portfolio at the same rebalance interval(s) utilized by the Underlying Index.

As long as the Fund invests at least 90% of its total assets in securities included in the Underlying Index, the Fund may hold up to 10% of its assets in investments not included in the Underlying Index, futures contracts, options on futures contracts, options, and swaps related to the Underlying Index, as well as cash and cash equivalents, and shares of investment funds, including money market funds. On a day-to-day basis, the Fund may also hold repurchase agreements, U.S. Government securities or cash equivalents to collateralize its derivatives positions. In an effort to make sure the Fund is fully invested on a day-to-day basis, the Fund may conduct any necessary trading activity at or just prior to the close of the U.S. financial markets.

To the extent the Underlying Index is concentrated in a particular industry the Fund will necessarily be concentrated in that industry. As of the date of this Prospectus, the Fund anticipates that it may have significant exposure to the consumer discretionary sector. The Fund is non-diversified and, therefore, may invest a greater percentage of its net assets in a particular issuer in comparison to a diversified fund.
Risk [Heading] rr_RiskHeading PRINCIPAL RISKS
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock
As with all exchange-traded funds, a shareholder is subject to the risk that his or her investment could lose money. In addition to this risk, the Fund is subject to a number of additional risks that may affect the value of its shares, including:

Authorized Participant Concentration Risk—Only an Authorized Participant may engage in creation or redemption transactions directly with the Fund. The Fund has a limited number of institutions that serve as Authorized Participants. To the extent that these institutions exit the business or are unable to proceed with creation and/or redemption orders with respect to the Fund and no other Authorized Participant is able to step forward to create or redeem, Fund shares may trade at a discount to NAV and possibly face delisting.

Correlation and Tracking Error Risk—A number of factors may affect the Fund’s ability to achieve a high degree of correlation with its Underlying Index, and there can be no guarantee that the Fund will achieve a high degree of correlation with its Underlying Index either on a single trading day or for a longer time period. Factors such as Fund expenses, imperfect correlation between the Fund’s investments and the components of the Underlying Index, rounding of share prices, changes to the composition of the Underlying Index, regulatory policies, a high portfolio turnover rate, and the use of leverage all contribute to tracking error and correlation risk. Failure to achieve a high degree of correlation may prevent the Fund from achieving its investment objective and cause the Fund's performance to be less than you expect.
 
Equity Risk—The Fund is subject to the risk that the value of the equity securities and equity-based derivatives, if any, in the Fund’s portfolio will decline due to volatility in the equity market caused by general market and economic conditions, perceptions regarding particular industries represented in the equity market, or factors relating to specific companies to which the Fund has investment exposure.

ETF Trading Risks—An unanticipated closing of the Exchange or one or more markets on which either the Fund’s shares trade or the Fund’s portfolio holdings trade or the inability of such markets to open for trading during normal business hours, such as in response to a natural disaster or other event causing severe market disruption, could result in a shareholder’s inability to buy or sell shares of the Fund and the Fund’s inability to buy and sell exchange-traded portfolio securities during that period, or in a disruption of the Fund’s creation and redemption process, and may make it difficult for the Fund to accurately price its investments thereby potentially affecting the price at which Fund shares trade in the secondary market. All of these events could adversely affect the performance of the Fund. Trading in Fund shares also may be halted by the Exchange or other markets because of market conditions or other reasons. If a trading halt occurs, a shareholder may temporarily be unable to purchase or sell shares of the Fund. Similarly, the Exchange or other markets may issue trading halts on specific securities or derivatives, which will affect the ability of the Fund to buy or sell certain securities or derivatives. In such circumstances, the Fund may be unable to rebalance its portfolio or accurately price its investments and may incur substantial trading losses.

Shares also may trade on the Exchange or on other markets at prices below their NAV. The NAV of shares will fluctuate with changes in the market value of the Fund’s holdings and the exchange-traded prices of the Fund's shares may not reflect these market values. Although the Fund’s shares are currently listed on the Exchange, there can be no assurance that an active trading market for shares will develop or be maintained.
 
Liquidity and Valuation Risk—In certain circumstances, it may be difficult for the Fund to purchase and sell a particular investment within a reasonable time at a fair price, or the price at which it has been valued by the Advisor for purposes of the Fund’s NAV, causing the Fund to be less liquid. In addition, the ability of the Fund to assign an accurate daily value to certain investments may be difficult, and the Advisor may be required to fair value the investments.

Market Risk—The Fund's investments in equity securities and derivatives, in general, are subject to market risks that may cause their prices, and therefore the Fund's NAV, to fluctuate over time. Markets are subject to political, regulatory, economic and financial market risks.
 
Non-Diversification Risk—The Fund is considered non-diversified and can invest a greater portion of its assets in securities of individual issuers than a diversified fund. As a result, changes in the market value of a single issuer could cause greater fluctuations in the value of Fund shares than would occur in a diversified fund.

Passive Investment Risk—The Fund is not actively managed and the Advisor does not attempt to take defensive positions in declining markets. Therefore, the Fund may be subject to greater losses in a declining market than a fund that is actively managed.

Sector Risk—The Sector Risk applicable to the Fund is as follows:

Consumer Discretionary Sector Risk. The Fund's investments are exposed to issuers conducting business in the consumer discretionary sector. The Fund is subject to the risk that the securities of such issuers will underperform the market as a whole due to legislative or regulatory changes, adverse market conditions and/or increased competition affecting the consumer discretionary sector. The performance of consumer discretionary companies has historically been closely tied to the performance of the overall economy, and is also affected by consumer confidence, attitudes and spending.
Risk Lose Money [Text] rr_RiskLoseMoney As with all exchange-traded funds, a shareholder is subject to the risk that his or her investment could lose money.
Risk Nondiversified Status [Text] rr_RiskNondiversifiedStatus Non-Diversification Risk—The Fund is considered non-diversified and can invest a greater portion of its assets in securities of individual issuers than a diversified fund. As a result, changes in the market value of a single issuer could cause greater fluctuations in the value of Fund shares than would occur in a diversified fund.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading PERFORMANCE INFORMATION
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock
The following bar chart shows the performance of the shares of the Fund from year to year. The variability of performance over time provides an indication of the risks of investing in the Fund. The following table shows the performance of the shares of the Fund as an average over different periods of time in comparison to the performance of the Underlying Index and the S&P 500® Index Consumer Discretionary Total Return, which is the market capitalization weighted version of the Underlying Index. The figures in the bar chart and table assume the reinvestment of dividends and capital gains distributions. Of course, this past performance (before and after taxes) does not necessarily indicate how the Fund will perform in the future.

Updated performance information is available on the Fund’s website at guggenheiminvestments.com or by calling Guggenheim Investments Client Services at 800.820.0888.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The following bar chart shows the performance of the shares of the Fund from year to year. The variability of performance over time provides an indication of the risks of investing in the Fund.
Performance Availability Phone [Text] rr_PerformanceAvailabilityPhone 800.820.0888
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress guggenheiminvestments.com
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Of course, this past performance (before and after taxes) does not necessarily indicate how the Fund will perform in the future.
Bar Chart [Heading] rr_BarChartHeading The performance information shown below is based on a calendar year.
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock
Highest Quarter Return
 
Lowest Quarter Return
Q3 2009
30.52%
 
Q4 2008
-31.01%
Performance Table Heading rr_PerformanceTableHeading AVERAGE ANNUAL TOTAL RETURN (for periods ended December 31, 2015)
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate The after-tax returns presented in the table below are calculated using highest historical individual federal marginal income tax rates and do not reflect the impact of state and local taxes.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred Your actual after-tax returns will depend on your specific tax situation and may differ from those shown below. After-tax returns are not relevant to investors who hold shares of the Fund through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts (“IRAs”).
Performance Table Narrative rr_PerformanceTableNarrativeTextBlock
The after-tax returns presented in the table below are calculated using highest historical individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Your actual after-tax returns will depend on your specific tax situation and may differ from those shown below. After-tax returns are not relevant to investors who hold shares of the Fund through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts (“IRAs”).
Guggenheim Broad Market and Sector Equal Weight ETFs | Guggenheim S&P 500® Equal Weight Consumer Discretionary ETF | S&P 500 Equal Weight Index Consumer Discretionary Total Return  
Prospectus: rr_ProspectusTable  
Index No Deduction for Fees, Expenses, Taxes [Text] rr_IndexNoDeductionForFeesExpensesTaxes (reflects no deduction for fees, expenses or taxes)
Label rr_AverageAnnualReturnLabel S&P 500® Equal Weight Index Consumer Discretionary Total Return (reflects no deduction for fees, expenses or taxes)
1 Year rr_AverageAnnualReturnYear01 (2.50%)
5 Years rr_AverageAnnualReturnYear05 15.08%
Since Inception rr_AverageAnnualReturnSinceInception 8.99%
Inception Date rr_AverageAnnualReturnInceptionDate Nov. 01, 2006
Guggenheim Broad Market and Sector Equal Weight ETFs | Guggenheim S&P 500® Equal Weight Consumer Discretionary ETF | S&P 500 Index Consumer Discretionary Total Return  
Prospectus: rr_ProspectusTable  
Index No Deduction for Fees, Expenses, Taxes [Text] rr_IndexNoDeductionForFeesExpensesTaxes (reflects no deduction for fees, expenses or taxes)
Label rr_AverageAnnualReturnLabel S&P 500® Index Consumer Discretionary Total Return (reflects no deduction for fees, expenses or taxes)
1 Year rr_AverageAnnualReturnYear01 10.11%
5 Years rr_AverageAnnualReturnYear05 17.84%
Since Inception rr_AverageAnnualReturnSinceInception 10.37%
Inception Date rr_AverageAnnualReturnInceptionDate Nov. 01, 2006
Guggenheim Broad Market and Sector Equal Weight ETFs | Guggenheim S&P 500® Equal Weight Consumer Discretionary ETF | Guggenheim S&P 500® Equal Weight Consumer Discretionary ETF  
Prospectus: rr_ProspectusTable  
Trading Symbol dei_TradingSymbol RCD
Shareholder Fee, Other rr_ShareholderFeeOther none
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.40%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets none [9]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 0.40%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 41
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 129
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 225
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 506
Annual Return 2007 rr_AnnualReturn2007 (16.12%)
Annual Return 2008 rr_AnnualReturn2008 (41.02%)
Annual Return 2009 rr_AnnualReturn2009 63.97%
Annual Return 2010 rr_AnnualReturn2010 26.78%
Annual Return 2011 rr_AnnualReturn2011 4.26%
Annual Return 2012 rr_AnnualReturn2012 21.90%
Annual Return 2013 rr_AnnualReturn2013 43.17%
Annual Return 2014 rr_AnnualReturn2014 11.34%
Annual Return 2015 rr_AnnualReturn2015 (2.85%)
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Highest Quarter Return
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Sep. 30, 2009
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 30.52%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Lowest Quarter Return
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2008
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (31.01%)
Label rr_AverageAnnualReturnLabel Return Before Taxes
1 Year rr_AverageAnnualReturnYear01 (2.85%)
5 Years rr_AverageAnnualReturnYear05 14.50%
Since Inception rr_AverageAnnualReturnSinceInception 8.50%
Inception Date rr_AverageAnnualReturnInceptionDate Nov. 01, 2006
Guggenheim Broad Market and Sector Equal Weight ETFs | Guggenheim S&P 500® Equal Weight Consumer Discretionary ETF | Guggenheim S&P 500® Equal Weight Consumer Discretionary ETF | After Taxes on Distributions  
Prospectus: rr_ProspectusTable  
Label rr_AverageAnnualReturnLabel Return After Taxes on Distributions
1 Year rr_AverageAnnualReturnYear01 (3.41%)
5 Years rr_AverageAnnualReturnYear05 13.94%
Since Inception rr_AverageAnnualReturnSinceInception 7.99%
Inception Date rr_AverageAnnualReturnInceptionDate Nov. 01, 2006
Guggenheim Broad Market and Sector Equal Weight ETFs | Guggenheim S&P 500® Equal Weight Consumer Discretionary ETF | Guggenheim S&P 500® Equal Weight Consumer Discretionary ETF | After Taxes on Distributions and Sales  
Prospectus: rr_ProspectusTable  
Label rr_AverageAnnualReturnLabel Return After Taxes on Distributions and Sale of Fund Shares
1 Year rr_AverageAnnualReturnYear01 (1.60%)
5 Years rr_AverageAnnualReturnYear05 11.39%
Since Inception rr_AverageAnnualReturnSinceInception 6.62%
Inception Date rr_AverageAnnualReturnInceptionDate Nov. 01, 2006
Guggenheim Broad Market and Sector Equal Weight ETFs | Guggenheim S&P 500® Equal Weight Consumer Staples ETF  
Prospectus: rr_ProspectusTable  
Risk/Return [Heading] rr_RiskReturnHeading GUGGENHEIM S&P 500® EQUAL WEIGHT CONSUMER STAPLES ETF (RHS)
Objective [Heading] rr_ObjectiveHeading INVESTMENT OBJECTIVE
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock
The investment objective of the Guggenheim S&P 500® Equal Weight Consumer Staples ETF (the “Fund”) is to replicate as closely as possible, before fees and expenses, the performance of the S&P 500® Equal Weight Index Consumer Staples Total Return (the “Underlying Index”).
Expense [Heading] rr_ExpenseHeading FEES AND EXPENSES OF THE FUND
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock
The table below describes the fees and expenses that you may pay if you buy and hold shares of the Fund. Most investors also will incur customary brokerage commissions when buying or selling shares of the Fund, which are not reflected in the table or the Example. If commissions were included in the table and the Example, the costs shown would be higher.
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption Shareholder Fees (fees paid directly from your investment)
Operating Expenses Caption [Text] rr_OperatingExpensesCaption Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading PORTFOLIO TURNOVER
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock
The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in Total Annual Fund Operating Expenses or in the Example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 16% of the average value of its portfolio. However, the Fund’s portfolio turnover rate is calculated without regard to cash instruments, most derivatives and securities received or delivered as a result of in-kind creations and redemptions of the Fund’s shares. If such instruments were included, the Fund’s portfolio turnover rate might be significantly higher.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 16.00%
Expense Exchange Traded Fund Commissions [Text] rr_ExpenseExchangeTradedFundCommissions Most investors also will incur customary brokerage commissions when buying or selling shares of the Fund, which are not reflected in the table or the Example.
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 funds.
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 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:
Strategy [Heading] rr_StrategyHeading PRINCIPAL INVESTMENT STRATEGIES
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock
The Fund invests primarily in equity securities to meet its investment objective of replicating the Underlying Index as closely as possible, before fees and expenses. The Underlying Index is an unmanaged equal weighted version of the S&P 500® Consumer Staples Index that consists of the common stocks of the following industries: food and drug retailing, beverages, food products, tobacco, household products and personal products that comprise the Consumer Staples sector of the S&P 500® Index. As of December 31, 2015, the Underlying Index included companies with a capitalization range of $11 billion to $216 billion. In general, the equal weighting provided by the Underlying Index provides equal representation for all securities at the Underlying Index’s rebalance interval(s), thereby providing broader exposure to the majority of securities in the Underlying Index than typically may be found in the Underlying Index’s market capitalization weighted counterpart.

The Fund uses a passive management strategy, known as “replication,” to track the performance of the Underlying Index. “Replication” refers to investing in substantially all of the securities in the Underlying Index in approximately the same proportions as in the Underlying Index. Under normal circumstances, the Fund will invest at least 90% of its net assets, plus any borrowings for investment purposes, in the equity securities included in the Underlying Index. The Advisor expects that, over time, the correlation between the Fund’s performance and that of the Underlying Index, before fees and expenses, will be 95% or better. A figure of 100% would indicate perfect correlation. The Advisor monitors the Fund’s tracking of the Underlying Index and seeks to maintain an appropriate correlation. The Advisor rebalances the Fund’s portfolio at the same rebalance interval(s) utilized by the Underlying Index.

As long as the Fund invests at least 90% of its total assets in securities included in the Underlying Index, the Fund may hold up to 10% of its assets in investments not included in the Underlying Index, futures contracts, options on futures contracts, options, and swaps related to the Underlying Index, as well as cash and cash equivalents, and shares of investment funds, including money market funds. On a day-to-day basis, the Fund may also hold repurchase agreements, U.S. Government securities or cash equivalents to collateralize its derivatives positions. In an effort to make sure the Fund is fully invested on a day-to-day basis, the Fund may conduct any necessary trading activity at or just prior to the close of the U.S. financial markets.

To the extent the Underlying Index is concentrated in a particular industry the Fund will necessarily be concentrated in that industry. As of the date of this Prospectus, the Fund anticipates that it may have significant exposure to the consumer staples sector. Also as of the date of this Prospectus, the Underlying Index components and thus the Fund's assets, are concentrated in the food products industry or group of industries, as applicable. The Fund is non-diversified and, therefore, may invest a greater percentage of its net assets in a particular issuer in comparison to a diversified fund.
Risk [Heading] rr_RiskHeading PRINCIPAL RISKS
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock
As with all exchange-traded funds, a shareholder is subject to the risk that his or her investment could lose money. In addition to this risk, the Fund is subject to a number of additional risks that may affect the value of its shares, including:

Authorized Participant Concentration Risk—Only an Authorized Participant may engage in creation or redemption transactions directly with the Fund. The Fund has a limited number of institutions that serve as Authorized Participants. To the extent that these institutions exit the business or are unable to proceed with creation and/or redemption orders with respect to the Fund and no other Authorized Participant is able to step forward to create or redeem, Fund shares may trade at a discount to NAV and possibly face delisting.

Correlation and Tracking Error Risk—A number of factors may affect the Fund’s ability to achieve a high degree of correlation with its Underlying Index, and there can be no guarantee that the Fund will achieve a high degree of correlation with its Underlying Index either on a single trading day or for a longer time period. Factors such as Fund expenses, imperfect correlation between the Fund’s investments and the components of the Underlying Index, rounding of share prices, changes to the composition of the Underlying Index, regulatory policies, a high portfolio turnover rate, and the use of leverage all contribute to tracking error and correlation risk. Failure to achieve a high degree of correlation may prevent the Fund from achieving its investment objective and cause the Fund's performance to be less than you expect.
 
Equity Risk—The Fund is subject to the risk that the value of the equity securities and equity-based derivatives, if any, in the Fund’s portfolio will decline due to volatility in the equity market caused by general market and economic conditions, perceptions regarding particular industries represented in the equity market, or factors relating to specific companies to which the Fund has investment exposure.

ETF Trading Risks—An unanticipated closing of the Exchange or one or more markets on which either the Fund’s shares trade or the Fund’s portfolio holdings trade or the inability of such markets to open for trading during normal business hours, such as in response to a natural disaster or other event causing severe market disruption, could result in a shareholder’s inability to buy or sell shares of the Fund and the Fund’s inability to buy and sell exchange-traded portfolio securities during that period, or in a disruption of the Fund’s creation and redemption process, and may make it difficult for the Fund to accurately price its investments thereby potentially affecting the price at which Fund shares trade in the secondary market. All of these events could adversely affect the performance of the Fund. Trading in Fund shares also may be halted by the Exchange or other markets because of market conditions or other reasons. If a trading halt occurs, a shareholder may temporarily be unable to purchase or sell shares of the Fund. Similarly, the Exchange or other markets may issue trading halts on specific securities or derivatives, which will affect the ability of the Fund to buy or sell certain securities or derivatives. In such circumstances, the Fund may be unable to rebalance its portfolio or accurately price its investments and may incur substantial trading losses.

Shares also may trade on the Exchange or on other markets at prices below their NAV. The NAV of shares will fluctuate with changes in the market value of the Fund’s holdings and the exchange-traded prices of the Fund's shares may not reflect these market values. Although the Fund’s shares are currently listed on the Exchange, there can be no assurance that an active trading market for shares will develop or be maintained.

Industry Concentration Risk—The Fund may concentrate its investments in a limited number of issuers conducting business in the same industry or group of related industries. Market conditions, interest rates, and economic, regulatory, or financial developments could significantly affect a single industry or a group of related industries, and the securities of companies in that industry or group of industries could react similarly to these or other developments.

Liquidity and Valuation Risk—In certain circumstances, it may be difficult for the Fund to purchase and sell a particular investment within a reasonable time at a fair price, or the price at which it has been valued by the Advisor for purposes of the Fund’s NAV, causing the Fund to be less liquid. In addition, the ability of the Fund to assign an accurate daily value to certain investments may be difficult, and the Advisor may be required to fair value the investments.

Market Risk—The Fund's investments in equity securities and derivatives, in general, are subject to market risks that may cause their prices, and therefore the Fund's NAV, to fluctuate over time. Markets are subject to political, regulatory, economic and financial market risks.

Non-Diversification Risk—The Fund is considered non-diversified and can invest a greater portion of its assets in securities of individual issuers than a diversified fund. As a result, changes in the market value of a single issuer could cause greater fluctuations in the value of Fund shares than would occur in a diversified fund.

Passive Investment Risk—The Fund is not actively managed and the Advisor does not attempt to take defensive positions in declining markets. Therefore, the Fund may be subject to greater losses in a declining market than a fund that is actively managed.

Sector Risk—The Sector Risk applicable to the Fund is as follows:

Consumer Staples Sector Risk. The Fund's investments are exposed to issuers conducting business in the consumer staples sector. The Fund is subject to the risk that the securities of such issuers will underperform the market as a whole due to legislative or regulatory changes, adverse market conditions and/or increased competition affecting the consumer staples sector. The performance of consumer staples companies has historically been closely tied to the performance of the overall economy, and is also affected by consumer confidence, attitudes and spending.
Risk Lose Money [Text] rr_RiskLoseMoney As with all exchange-traded funds, a shareholder is subject to the risk that his or her investment could lose money.
Risk Nondiversified Status [Text] rr_RiskNondiversifiedStatus Non-Diversification Risk—The Fund is considered non-diversified and can invest a greater portion of its assets in securities of individual issuers than a diversified fund. As a result, changes in the market value of a single issuer could cause greater fluctuations in the value of Fund shares than would occur in a diversified fund.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading PERFORMANCE INFORMATION
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock
The following bar chart shows the performance of the shares of the Fund from year to year. The variability of performance over time provides an indication of the risks of investing in the Fund. The following table shows the performance of the shares of the Fund as an average over different periods of time in comparison to the performance of the Underlying Index and the S&P 500® Index Consumer Staples Total Return, which is the market capitalization weighted version of the Underlying Index. The figures in the bar chart and table assume the reinvestment of dividends and capital gains distributions. Of course, this past performance (before and after taxes) does not necessarily indicate how the Fund will perform in the future.
 
Updated performance information is available on the Fund’s website at guggenheiminvestments.com or by calling Guggenheim Investments Client Services at 800.820.0888.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The following bar chart shows the performance of the shares of the Fund from year to year. The variability of performance over time provides an indication of the risks of investing in the Fund.
Performance Availability Phone [Text] rr_PerformanceAvailabilityPhone 800.820.0888
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress guggenheiminvestments.com
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Of course, this past performance (before and after taxes) does not necessarily indicate how the Fund will perform in the future.
Bar Chart [Heading] rr_BarChartHeading The performance information shown below is based on a calendar year.
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock
Highest Quarter Return
 
Lowest Quarter Return
Q1 2013
17.16%
 
Q4 2008
-16.35%
Performance Table Heading rr_PerformanceTableHeading AVERAGE ANNUAL TOTAL RETURN (for periods ended December 31, 2015)
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate The after-tax returns presented in the table below are calculated using highest historical individual federal marginal income tax rates and do not reflect the impact of state and local taxes.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred Your actual after-tax returns will depend on your specific tax situation and may differ from those shown below. After-tax returns are not relevant to investors who hold shares of the Fund through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts (“IRAs”).
Performance Table Narrative rr_PerformanceTableNarrativeTextBlock
The after-tax returns presented in the table below are calculated using highest historical individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Your actual after-tax returns will depend on your specific tax situation and may differ from those shown below. After-tax returns are not relevant to investors who hold shares of the Fund through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts (“IRAs”).
Guggenheim Broad Market and Sector Equal Weight ETFs | Guggenheim S&P 500® Equal Weight Consumer Staples ETF | S&P 500 Equal Weight Index Consumer Staples Total Return  
Prospectus: rr_ProspectusTable  
Index No Deduction for Fees, Expenses, Taxes [Text] rr_IndexNoDeductionForFeesExpensesTaxes (reflects no deduction for fees, expenses or taxes)
Label rr_AverageAnnualReturnLabel S&P 500® Equal Weight Index Consumer Staples Total Return (reflects no deduction for fees, expenses or taxes)
1 Year rr_AverageAnnualReturnYear01 13.61%
5 Years rr_AverageAnnualReturnYear05 18.15%
Since Inception rr_AverageAnnualReturnSinceInception 12.94%
Inception Date rr_AverageAnnualReturnInceptionDate Nov. 01, 2006
Guggenheim Broad Market and Sector Equal Weight ETFs | Guggenheim S&P 500® Equal Weight Consumer Staples ETF | S&P 500 Index Consumer Staples Total Return  
Prospectus: rr_ProspectusTable  
Index No Deduction for Fees, Expenses, Taxes [Text] rr_IndexNoDeductionForFeesExpensesTaxes (reflects no deduction for fees, expenses or taxes)
Label rr_AverageAnnualReturnLabel S&P 500® Index Consumer Staples Total Return (reflects no deduction for fees, expenses or taxes)
1 Year rr_AverageAnnualReturnYear01 6.60%
5 Years rr_AverageAnnualReturnYear05 14.51%
Since Inception rr_AverageAnnualReturnSinceInception 10.74%
Inception Date rr_AverageAnnualReturnInceptionDate Nov. 01, 2006
Guggenheim Broad Market and Sector Equal Weight ETFs | Guggenheim S&P 500® Equal Weight Consumer Staples ETF | Guggenheim S&P 500® Equal Weight Consumer Staples ETF  
Prospectus: rr_ProspectusTable  
Trading Symbol dei_TradingSymbol RHS
Shareholder Fee, Other rr_ShareholderFeeOther none
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.40%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets none [10]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 0.40%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 41
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 129
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 225
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 506
Annual Return 2007 rr_AnnualReturn2007 8.46%
Annual Return 2008 rr_AnnualReturn2008 (21.78%)
Annual Return 2009 rr_AnnualReturn2009 25.63%
Annual Return 2010 rr_AnnualReturn2010 17.95%
Annual Return 2011 rr_AnnualReturn2011 12.94%
Annual Return 2012 rr_AnnualReturn2012 12.17%
Annual Return 2013 rr_AnnualReturn2013 32.55%
Annual Return 2014 rr_AnnualReturn2014 17.93%
Annual Return 2015 rr_AnnualReturn2015 13.11%
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Highest Quarter Return
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Mar. 31, 2013
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 17.16%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Lowest Quarter Return
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2008
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (16.35%)
Label rr_AverageAnnualReturnLabel Return Before Taxes
1 Year rr_AverageAnnualReturnYear01 13.11%
5 Years rr_AverageAnnualReturnYear05 17.50%
Since Inception rr_AverageAnnualReturnSinceInception 12.32%
Inception Date rr_AverageAnnualReturnInceptionDate Nov. 01, 2006
Guggenheim Broad Market and Sector Equal Weight ETFs | Guggenheim S&P 500® Equal Weight Consumer Staples ETF | Guggenheim S&P 500® Equal Weight Consumer Staples ETF | After Taxes on Distributions  
Prospectus: rr_ProspectusTable  
Label rr_AverageAnnualReturnLabel Return After Taxes on Distributions
1 Year rr_AverageAnnualReturnYear01 12.18%
5 Years rr_AverageAnnualReturnYear05 16.59%
Since Inception rr_AverageAnnualReturnSinceInception 11.47%
Inception Date rr_AverageAnnualReturnInceptionDate Nov. 01, 2006
Guggenheim Broad Market and Sector Equal Weight ETFs | Guggenheim S&P 500® Equal Weight Consumer Staples ETF | Guggenheim S&P 500® Equal Weight Consumer Staples ETF | After Taxes on Distributions and Sales  
Prospectus: rr_ProspectusTable  
Label rr_AverageAnnualReturnLabel Return After Taxes on Distributions and Sale of Fund Shares
1 Year rr_AverageAnnualReturnYear01 7.38%
5 Years rr_AverageAnnualReturnYear05 13.70%
Since Inception rr_AverageAnnualReturnSinceInception 9.72%
Inception Date rr_AverageAnnualReturnInceptionDate Nov. 01, 2006
Guggenheim Broad Market and Sector Equal Weight ETFs | Guggenheim S&P 500® Equal Weight Energy ETF  
Prospectus: rr_ProspectusTable  
Risk/Return [Heading] rr_RiskReturnHeading GUGGENHEIM S&P 500® EQUAL WEIGHT ENERGY ETF (RYE)
Objective [Heading] rr_ObjectiveHeading INVESTMENT OBJECTIVE
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock
The investment objective of the Guggenheim S&P 500® Equal Weight Energy ETF (the “Fund”) is to replicate as closely as possible, before fees and expenses, the performance of the S&P 500® Equal Weight Index Energy Total Return (the “Underlying Index”).
Expense [Heading] rr_ExpenseHeading FEES AND EXPENSES OF THE FUND
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock
The table below describes the fees and expenses that you may pay if you buy and hold shares of the Fund. Most investors also will incur customary brokerage commissions when buying or selling shares of the Fund, which are not reflected in the table or the Example. If commissions were included in the table and the Example, the costs shown would be higher.
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption Shareholder Fees (fees paid directly from your investment)
Operating Expenses Caption [Text] rr_OperatingExpensesCaption Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading PORTFOLIO TURNOVER
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock
The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in Total Annual Fund Operating Expenses or in the Example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 34% of the average value of its portfolio. However, the Fund’s portfolio turnover rate is calculated without regard to cash instruments, most derivatives and securities received or delivered as a result of in-kind creations and redemptions of the Fund’s shares. If such instruments were included, the Fund’s portfolio turnover rate might be significantly higher.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 34.00%
Expense Exchange Traded Fund Commissions [Text] rr_ExpenseExchangeTradedFundCommissions Most investors also will incur customary brokerage commissions when buying or selling shares of the Fund, which are not reflected in the table or the Example.
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 funds.
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 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:
Strategy [Heading] rr_StrategyHeading PRINCIPAL INVESTMENT STRATEGIES
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock
The Fund invests primarily in equity securities to meet its investment objective of replicating the Underlying Index as closely as possible, before fees and expenses. The Underlying Index is an unmanaged equal weighted version of the S&P 500® Energy Index that consists of the common stocks of the following industries: oil and gas exploration, production, marketing, refining and/or transportation and energy equipment and services industries that comprise the Energy sector of the S&P 500® Index. As of December 31, 2015, the Underlying Index included companies with a capitalization range of $1.8 billion to $324.5 billion. In general, the equal weighting provided by the Underlying Index provides equal representation for all securities at the Underlying Index’s rebalance interval(s), thereby providing broader exposure to the majority of securities in the Underlying Index than typically may be found in the Underlying Index’s market capitalization weighted counterpart.

The Fund uses a passive management strategy, known as “replication,” to track the performance of the Underlying Index. “Replication” refers to investing in substantially all of the securities in the Underlying Index in approximately the same proportions as in the Underlying Index. Under normal circumstances, the Fund will invest at least 90% of its net assets, plus any borrowings for investment purposes, in the equity securities included in the Underlying Index. The Advisor expects that, over time, the correlation between the Fund’s performance and that of the Underlying Index, before fees and expenses, will be 95% or better. A figure of 100% would indicate perfect correlation. The Advisor monitors the Fund’s tracking of the Underlying Index and seeks to maintain an appropriate correlation. The Advisor rebalances the Fund’s portfolio at the same rebalance interval(s) utilized by the Underlying Index.

As long as the Fund invests at least 90% of its total assets in securities included in the Underlying Index, the Fund may hold up to 10% of its assets in investments not included in the Underlying Index, futures contracts, options on futures contracts, options, and swaps related to the Underlying Index, as well as cash and cash equivalents, and shares of investment funds, including money market funds. On a day-to-day basis, the Fund may also hold repurchase agreements, U.S. Government securities or cash equivalents to collateralize its derivatives positions. In an effort to make sure the Fund is fully invested on a day-to-day basis, the Fund may conduct any necessary trading activity at or just prior to the close of the U.S. financial markets.

To the extent the Underlying Index is concentrated in a particular industry the Fund will necessarily be concentrated in that industry. As of the date of this Prospectus, the Fund anticipates that it may have significant exposure to the energy sector. Also as of the date of this Prospectus, the Underlying Index components and thus the Fund's assets, are concentrated in the oil, gas and consumable fuels industry or group of industries, as applicable. The Fund is non-diversified and, therefore, may invest a greater percentage of its net assets in a particular issuer in comparison to a diversified fund.
Risk [Heading] rr_RiskHeading PRINCIPAL RISKS
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock
As with all exchange-traded funds, a shareholder is subject to the risk that his or her investment could lose money. In addition to this risk, the Fund is subject to a number of additional risks that may affect the value of its shares, including:

Authorized Participant Concentration Risk—Only an Authorized Participant may engage in creation or redemption transactions directly with the Fund. The Fund has a limited number of institutions that serve as Authorized Participants. To the extent that these institutions exit the business or are unable to proceed with creation and/or redemption orders with respect to the Fund and no other Authorized Participant is able to step forward to create or redeem, Fund shares may trade at a discount to NAV and possibly face delisting.

Correlation and Tracking Error Risk—A number of factors may affect the Fund’s ability to achieve a high degree of correlation with its Underlying Index, and there can be no guarantee that the Fund will achieve a high degree of correlation with its Underlying Index either on a single trading day or for a longer time period. Factors such as Fund expenses, imperfect correlation between the Fund’s investments and the components of the Underlying Index, rounding of share prices, changes to the composition of the Underlying Index, regulatory policies, a high portfolio turnover rate, and the use of leverage all contribute to tracking error and correlation risk. Failure to achieve a high degree of correlation may prevent the Fund from achieving its investment objective and cause the Fund's performance to be less than you expect.
 
Equity Risk—The Fund is subject to the risk that the value of the equity securities and equity-based derivatives, if any, in the Fund’s portfolio will decline due to volatility in the equity market caused by general market and economic conditions, perceptions regarding particular industries represented in the equity market, or factors relating to specific companies to which the Fund has investment exposure.

ETF Trading Risks—An unanticipated closing of the Exchange or one or more markets on which either the Fund’s shares trade or the Fund’s portfolio holdings trade or the inability of such markets to open for trading during normal business hours, such as in response to a natural disaster or other event causing severe market disruption, could result in a shareholder’s inability to buy or sell shares of the Fund and the Fund’s inability to buy and sell exchange-traded portfolio securities during that period, or in a disruption of the Fund’s creation and redemption process, and may make it difficult for the Fund to accurately price its investments thereby potentially affecting the price at which Fund shares trade in the secondary market. All of these events could adversely affect the performance of the Fund. Trading in Fund shares also may be halted by the Exchange or other markets because of market conditions or other reasons. If a trading halt occurs, a shareholder may temporarily be unable to purchase or sell shares of the Fund. Similarly, the Exchange or other markets may issue trading halts on specific securities or derivatives, which will affect the ability of the Fund to buy or sell certain securities or derivatives. In such circumstances, the Fund may be unable to rebalance its portfolio or accurately price its investments and may incur substantial trading losses.

Shares also may trade on the Exchange or on other markets at prices below their NAV. The NAV of shares will fluctuate with changes in the market value of the Fund’s holdings and the exchange-traded prices of the Fund's shares may not reflect these market values. Although the Fund’s shares are currently listed on the Exchange, there can be no assurance that an active trading market for shares will develop or be maintained.

Industry Concentration Risk—The Fund may concentrate its investments in a limited number of issuers conducting business in the same industry or group of related industries. Market conditions, interest rates, and economic, regulatory, or financial developments could significantly affect a single industry or a group of related industries, and the securities of companies in that industry or group of industries could react similarly to these or other developments.
 
Liquidity and Valuation Risk—In certain circumstances, it may be difficult for the Fund to purchase and sell a particular investment within a reasonable time at a fair price, or the price at which it has been valued by the Advisor for purposes of the Fund’s NAV, causing the Fund to be less liquid. In addition, the ability of the Fund to assign an accurate daily value to certain investments may be difficult, and the Advisor may be required to fair value the investments.

Market Risk—The Fund's investments in equity securities and derivatives, in general, are subject to market risks that may cause their prices, and therefore the Fund's NAV, to fluctuate over time. Markets are subject to political, regulatory, economic and financial market risks.

Non-Diversification Risk—The Fund is considered non-diversified and can invest a greater portion of its assets in securities of individual issuers than a diversified fund. As a result, changes in the market value of a single issuer could cause greater fluctuations in the value of Fund shares than would occur in a diversified fund.

Passive Investment Risk—The Fund is not actively managed and the Advisor does not attempt to take defensive positions in declining markets. Therefore, the Fund may be subject to greater losses in a declining market than a fund that is actively managed.

Sector Risk—The Sector Risk applicable to the Fund is as follows:

Energy Sector Risk. The Fund's investments are exposed to issuers conducting business in the energy sector. The Fund is subject to the risk that the securities of such issuers will underperform the market as a whole due to legislative or regulatory changes, adverse market conditions and/or increased competition affecting the energy sector. The performance of energy sector companies is closely tied to the price and supply of energy fuels and international political events.
Risk Lose Money [Text] rr_RiskLoseMoney As with all exchange-traded funds, a shareholder is subject to the risk that his or her investment could lose money.
Risk Nondiversified Status [Text] rr_RiskNondiversifiedStatus Non-Diversification Risk—The Fund is considered non-diversified and can invest a greater portion of its assets in securities of individual issuers than a diversified fund. As a result, changes in the market value of a single issuer could cause greater fluctuations in the value of Fund shares than would occur in a diversified fund.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading PERFORMANCE INFORMATION
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock
The following bar chart shows the performance of the shares of the Fund from year to year. The variability of performance over time provides an indication of the risks of investing in the Fund. The following table shows the performance of the shares of the Fund as an average over different periods of time in comparison to the performance of the Underlying Index and the S&P 500® Index Energy Total Return, which is the market capitalization weighted version of the Underlying Index. The figures in the bar chart and table assume the reinvestment of dividends and capital gains distributions. Of course, this past performance (before and after taxes) does not necessarily indicate how the Fund will perform in the future.

Updated performance information is available on the Fund’s website at guggenheiminvestments.com or by calling Guggenheim Investments Client Services at 800.820.0888.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The following bar chart shows the performance of the shares of the Fund from year to year. The variability of performance over time provides an indication of the risks of investing in the Fund.
Performance Availability Phone [Text] rr_PerformanceAvailabilityPhone 800.820.0888
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress guggenheiminvestments.com
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Of course, this past performance (before and after taxes) does not necessarily indicate how the Fund will perform in the future.
Bar Chart [Heading] rr_BarChartHeading The performance information shown below is based on a calendar year.
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock
Highest Quarter Return
 
Lowest Quarter Return
Q4 2010
23.59%
 
Q4 2008
-34.65%
Performance Table Heading rr_PerformanceTableHeading AVERAGE ANNUAL TOTAL RETURN (for periods ended December 31, 2015)
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate The after-tax returns presented in the table below are calculated using highest historical individual federal marginal income tax rates and do not reflect the impact of state and local taxes.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred Your actual after-tax returns will depend on your specific tax situation and may differ from those shown below. After-tax returns are not relevant to investors who hold shares of the Fund through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts (“IRAs”).
Performance Table Narrative rr_PerformanceTableNarrativeTextBlock
The after-tax returns presented in the table below are calculated using highest historical individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Your actual after-tax returns will depend on your specific tax situation and may differ from those shown below. After-tax returns are not relevant to investors who hold shares of the Fund through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts (“IRAs”).
Guggenheim Broad Market and Sector Equal Weight ETFs | Guggenheim S&P 500® Equal Weight Energy ETF | S&P 500 Equal Weight Index Energy Total Return  
Prospectus: rr_ProspectusTable  
Index No Deduction for Fees, Expenses, Taxes [Text] rr_IndexNoDeductionForFeesExpensesTaxes (reflects no deduction for fees, expenses or taxes)
Label rr_AverageAnnualReturnLabel S&P 500® Equal Weight Index Energy Total Return (reflects no deduction for fees, expenses or taxes)
1 Year rr_AverageAnnualReturnYear01 (28.71%)
5 Years rr_AverageAnnualReturnYear05 (3.99%)
Since Inception rr_AverageAnnualReturnSinceInception 1.56%
Inception Date rr_AverageAnnualReturnInceptionDate Nov. 01, 2006
Guggenheim Broad Market and Sector Equal Weight ETFs | Guggenheim S&P 500® Equal Weight Energy ETF | S&P 500 Index Energy Total Return  
Prospectus: rr_ProspectusTable  
Index No Deduction for Fees, Expenses, Taxes [Text] rr_IndexNoDeductionForFeesExpensesTaxes (reflects no deduction for fees, expenses or taxes)
Label rr_AverageAnnualReturnLabel S&P 500® Index Energy Total Return (reflects no deduction for fees, expenses or taxes)
1 Year rr_AverageAnnualReturnYear01 (21.12%)
5 Years rr_AverageAnnualReturnYear05 (0.07%)
Since Inception rr_AverageAnnualReturnSinceInception 2.75%
Inception Date rr_AverageAnnualReturnInceptionDate Nov. 01, 2006
Guggenheim Broad Market and Sector Equal Weight ETFs | Guggenheim S&P 500® Equal Weight Energy ETF | Guggenheim S&P 500® Equal Weight Energy ETF  
Prospectus: rr_ProspectusTable  
Trading Symbol dei_TradingSymbol RYE
Shareholder Fee, Other rr_ShareholderFeeOther none
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.40%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets none [11]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 0.40%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 41
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 129
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 225
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 506
Annual Return 2007 rr_AnnualReturn2007 41.19%
Annual Return 2008 rr_AnnualReturn2008 (48.82%)
Annual Return 2009 rr_AnnualReturn2009 45.28%
Annual Return 2010 rr_AnnualReturn2010 26.50%
Annual Return 2011 rr_AnnualReturn2011 (1.60%)
Annual Return 2012 rr_AnnualReturn2012 5.94%
Annual Return 2013 rr_AnnualReturn2013 26.63%
Annual Return 2014 rr_AnnualReturn2014 (14.86%)
Annual Return 2015 rr_AnnualReturn2015 (28.69%)
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Highest Quarter Return
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Dec. 31, 2010
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 23.59%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Lowest Quarter Return
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2008
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (34.65%)
Label rr_AverageAnnualReturnLabel Return Before Taxes
1 Year rr_AverageAnnualReturnYear01 (28.69%)
5 Years rr_AverageAnnualReturnYear05 (4.33%)
Since Inception rr_AverageAnnualReturnSinceInception 1.08%
Inception Date rr_AverageAnnualReturnInceptionDate Nov. 01, 2006
Guggenheim Broad Market and Sector Equal Weight ETFs | Guggenheim S&P 500® Equal Weight Energy ETF | Guggenheim S&P 500® Equal Weight Energy ETF | After Taxes on Distributions  
Prospectus: rr_ProspectusTable  
Label rr_AverageAnnualReturnLabel Return After Taxes on Distributions
1 Year rr_AverageAnnualReturnYear01 (29.40%)
5 Years rr_AverageAnnualReturnYear05 (4.86%)
Since Inception rr_AverageAnnualReturnSinceInception 0.55%
Inception Date rr_AverageAnnualReturnInceptionDate Nov. 01, 2006
Guggenheim Broad Market and Sector Equal Weight ETFs | Guggenheim S&P 500® Equal Weight Energy ETF | Guggenheim S&P 500® Equal Weight Energy ETF | After Taxes on Distributions and Sales  
Prospectus: rr_ProspectusTable  
Label rr_AverageAnnualReturnLabel Return After Taxes on Distributions and Sale of Fund Shares
1 Year rr_AverageAnnualReturnYear01 (16.16%)
5 Years rr_AverageAnnualReturnYear05 (3.36%)
Since Inception rr_AverageAnnualReturnSinceInception 0.69%
Inception Date rr_AverageAnnualReturnInceptionDate Nov. 01, 2006
Guggenheim Broad Market and Sector Equal Weight ETFs | Guggenheim S&P 500® Equal Weight Financials ETF  
Prospectus: rr_ProspectusTable  
Risk/Return [Heading] rr_RiskReturnHeading GUGGENHEIM S&P 500® EQUAL WEIGHT FINANCIALS ETF (RYF)
Objective [Heading] rr_ObjectiveHeading INVESTMENT OBJECTIVE
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock
The investment objective of Guggenheim S&P 500® Equal Weight Financials ETF (the “Fund”) is to replicate as closely as possible, before fees and expenses, the performance of the S&P 500® Equal Weight Index Financials Total Return (the “Underlying Index”).
Expense [Heading] rr_ExpenseHeading FEES AND EXPENSES OF THE FUND
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock
The table below describes the fees and expenses that you may pay if you buy and hold shares of the Fund. Most investors also will incur customary brokerage commissions when buying or selling shares of the Fund, which are not reflected in the table or the Example. If commissions were included in the table and the Example, the costs shown would be higher.
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption Shareholder Fees (fees paid directly from your investment)
Operating Expenses Caption [Text] rr_OperatingExpensesCaption Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading PORTFOLIO TURNOVER
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock
The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in Total Annual Fund Operating Expenses or in the Example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 13% of the average value of its portfolio. However, the Fund’s portfolio turnover rate is calculated without regard to cash instruments, most derivatives and securities received or delivered as a result of in-kind creations and redemptions of the Fund’s shares. If such instruments were included, the Fund’s portfolio turnover rate might be significantly higher.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 13.00%
Expense Exchange Traded Fund Commissions [Text] rr_ExpenseExchangeTradedFundCommissions Most investors also will incur customary brokerage commissions when buying or selling shares of the Fund, which are not reflected in the table or the Example.
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 funds.
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 primarily in equity securities to meet its investment objective of replicating the Underlying Index as closely as possible, before fees and expenses. The Underlying Index is an unmanaged equal weighted version of the S&P 500® Financials Index that consists of the common stocks of the following industries: banks, diversified financials, brokerage, asset management insurance and real estate, including investment trusts that comprise the Financials sector of the S&P 500® Index. As of December 31, 2015, the Underlying Index included companies with a capitalization range of $4.1 billion to $325.5 billion. In general, the equal weighting provided by the Underlying Index provides equal representation for all securities at the Underlying Index’s rebalance interval(s), thereby providing broader exposure to the majority of securities in the Underlying Index than typically may be found in the Underlying Index’s market capitalization weighted counterpart.

The Fund uses a passive management strategy, known as “replication,” to track the performance of the Underlying Index. “Replication” refers to investing in substantially all of the securities in the Underlying Index in approximately the same proportions as in the Underlying Index. Under normal circumstances, the Fund will invest at least 90% of its net assets, plus any borrowings for investment purposes, in the equity securities included in the Underlying Index. The Advisor expects that, over time, the correlation between the Fund’s performance and that of the Underlying Index, before fees and expenses, will be 95% or better. A figure of 100% would indicate perfect correlation. The Advisor monitors the Fund’s tracking of the Underlying Index and seeks to maintain an appropriate correlation. The Advisor rebalances the Fund’s portfolio at the same rebalance interval(s) utilized by the Underlying Index.

As long as the Fund invests at least 90% of its total assets in securities included in the Underlying Index, the Fund may hold up to 10% of its assets in investments not included in the Underlying Index, futures contracts, options on futures contracts, options, and swaps related to the Underlying Index, as well as cash and cash equivalents, and shares of investment funds, including money market funds. On a day-to-day basis, the Fund may also hold repurchase agreements, U.S. Government securities or cash equivalents to collateralize its derivatives positions. In an effort to make sure the Fund is fully invested on a day-to-day basis, the Fund may conduct any necessary trading activity at or just prior to the close of the U.S. financial markets.

To the extent the Underlying Index is concentrated in a particular industry the Fund will necessarily be concentrated in that industry. As of the date of this Prospectus, the Fund anticipates that it may have significant exposure to the financials sector. Also as of the date of this Prospectus, the Underlying Index components and thus the Fund's assets, are concentrated in the real estate investment trusts (REITs) industry or group of industries, as applicable. The Fund is non-diversified and, therefore, may invest a greater percentage of its net assets in a particular issuer in comparison to a diversified fund.

Risk [Heading] rr_RiskHeading PRINCIPAL RISKS
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock
As with all exchange-traded funds, a shareholder is subject to the risk that his or her investment could lose money. In addition to this risk, the Fund is subject to a number of additional risks that may affect the value of its shares, including:

Authorized Participant Concentration Risk—Only an Authorized Participant may engage in creation or redemption transactions directly with the Fund. The Fund has a limited number of institutions that serve as Authorized Participants. To the extent that these institutions exit the business or are unable to proceed with creation and/or redemption orders with respect to the Fund and no other Authorized Participant is able to step forward to create or redeem, Fund shares may trade at a discount to NAV and possibly face delisting.

Correlation and Tracking Error Risk—A number of factors may affect the Fund’s ability to achieve a high degree of correlation with its Underlying Index, and there can be no guarantee that the Fund will achieve a high degree of correlation with its Underlying Index either on a single trading day or for a longer time period. Factors such as Fund expenses, imperfect correlation between the Fund’s investments and the components of the Underlying Index, rounding of share prices, changes to the composition of the Underlying Index, regulatory policies, a high portfolio turnover rate, and the use of leverage all contribute to tracking error and correlation risk. Failure to achieve a high degree of correlation may prevent the Fund from achieving its investment objective and cause the Fund's performance to be less than you expect.
 
Equity Risk—The Fund is subject to the risk that the value of the equity securities and equity-based derivatives, if any, in the Fund’s portfolio will decline due to volatility in the equity market caused by general market and economic conditions, perceptions regarding particular industries represented in the equity market, or factors relating to specific companies to which the Fund has investment exposure.

ETF Trading Risks—An unanticipated closing of the Exchange or one or more markets on which either the Fund’s shares trade or the Fund’s portfolio holdings trade or the inability of such markets to open for trading during normal business hours, such as in response to a natural disaster or other event causing severe market disruption, could result in a shareholder’s inability to buy or sell shares of the Fund and the Fund’s inability to buy and sell exchange-traded portfolio securities during that period, or in a disruption of the Fund’s creation and redemption process, and may make it difficult for the Fund to accurately price its investments thereby potentially affecting the price at which Fund shares trade in the secondary market. All of these events could adversely affect the performance of the Fund. Trading in Fund shares also may be halted by the Exchange or other markets because of market conditions or other reasons. If a trading halt occurs, a shareholder may temporarily be unable to purchase or sell shares of the Fund. Similarly, the Exchange or other markets may issue trading halts on specific securities or derivatives, which will affect the ability of the Fund to buy or sell certain securities or derivatives. In such circumstances, the Fund may be unable to rebalance its portfolio or accurately price its investments and may incur substantial trading losses.

Shares also may trade on the Exchange or on other markets at prices below their NAV. The NAV of shares will fluctuate with changes in the market value of the Fund’s holdings and the exchange-traded prices of the Fund's shares may not reflect these market values. Although the Fund’s shares are currently listed on the Exchange, there can be no assurance that an active trading market for shares will develop or be maintained.

Industry Concentration Risk—The Fund may concentrate its investments in a limited number of issuers conducting business in the same industry or group of related industries. Market conditions, interest rates, and economic, regulatory, or financial developments could significantly affect a single industry or a group of related industries, and the securities of companies in that industry or group of industries could react similarly to these or other developments.
 
Liquidity and Valuation Risk—In certain circumstances, it may be difficult for the Fund to purchase and sell a particular investment within a reasonable time at a fair price, or the price at which it has been valued by the Advisor for purposes of the Fund’s NAV, causing the Fund to be less liquid. In addition, the ability of the Fund to assign an accurate daily value to certain investments may be difficult, and the Advisor may be required to fair value the investments.

Market Risk—The Fund's investments in equity securities and derivatives, in general, are subject to market risks that may cause their prices, and therefore the Fund's NAV, to fluctuate over time. Markets are subject to political, regulatory, economic and financial market risks.

Non-Diversification Risk—The Fund is considered non-diversified and can invest a greater portion of its assets in securities of individual issuers than a diversified fund. As a result, changes in the market value of a single issuer could cause greater fluctuations in the value of Fund shares than would occur in a diversified fund.

Passive Investment Risk—The Fund is not actively managed and the Advisor does not attempt to take defensive positions in declining markets. Therefore, the Fund may be subject to greater losses in a declining market than a fund that is actively managed.

Sector Risk—The Sector Risk applicable to the Fund is as follows:

Financials Sector Risk. The Fund's investments are exposed to issuers conducting business in the financials sector. The Fund is subject to the risk that the securities of such issuers will underperform the market as a whole due to legislative or regulatory changes, adverse market conditions and/or increased competition affecting the financials sector. Financial companies are subject to extensive government regulation, which may limit the financial commitments they can make and the interest rates and fees they can charge. Profitability of these companies depends largely on the availability and cost of capital funds.
Risk Lose Money [Text] rr_RiskLoseMoney As with all exchange-traded funds, a shareholder is subject to the risk that his or her investment could lose money.
Risk Nondiversified Status [Text] rr_RiskNondiversifiedStatus Non-Diversification Risk—The Fund is considered non-diversified and can invest a greater portion of its assets in securities of individual issuers than a diversified fund. As a result, changes in the market value of a single issuer could cause greater fluctuations in the value of Fund shares than would occur in a diversified fund.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading PERFORMANCE INFORMATION
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock
The following bar chart shows the performance of the shares of the Fund from year to year. The variability of performance over time provides an indication of the risks of investing in the Fund. The following table shows the performance of the shares of the Fund as an average over different periods of time in comparison to the performance of the Underlying Index and the S&P 500® Index Financials Total Return, which is the market capitalization weighted version of the Underlying Index. The figures in the bar chart and table assume the reinvestment of dividends and capital gains distributions. Of course, this past performance (before and after taxes) does not necessarily indicate how the Fund will perform in the future.

Updated performance information is available on the Fund’s website at guggenheiminvestments.com or by calling Guggenheim Investments Client Services at 800.820.0888.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The following bar chart shows the performance of the shares of the Fund from year to year. The variability of performance over time provides an indication of the risks of investing in the Fund.
Performance Availability Phone [Text] rr_PerformanceAvailabilityPhone 800.820.0888
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress guggenheiminvestments.com
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Of course, this past performance (before and after taxes) does not necessarily indicate how the Fund will perform in the future.
Bar Chart [Heading] rr_BarChartHeading The performance information shown below is based on a calendar year.
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock
Highest Quarter Return
 
Lowest Quarter Return
Q2 2009
40.11%
 
Q4 2008
-36.94%
Performance Table Heading rr_PerformanceTableHeading AVERAGE ANNUAL TOTAL RETURN (for periods ended December 31, 2015)
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate The after-tax returns presented in the table below are calculated using highest historical individual federal marginal income tax rates and do not reflect the impact of state and local taxes.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred Your actual after-tax returns will depend on your specific tax situation and may differ from those shown below. After-tax returns are not relevant to investors who hold shares of the Fund through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts (“IRAs”).
Performance Table Narrative rr_PerformanceTableNarrativeTextBlock
The after-tax returns presented in the table below are calculated using highest historical individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Your actual after-tax returns will depend on your specific tax situation and may differ from those shown below. After-tax returns are not relevant to investors who hold shares of the Fund through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts (“IRAs”).
Guggenheim Broad Market and Sector Equal Weight ETFs | Guggenheim S&P 500® Equal Weight Financials ETF | S&P 500 Equal Weight Index Financials Total Return  
Prospectus: rr_ProspectusTable  
Index No Deduction for Fees, Expenses, Taxes [Text] rr_IndexNoDeductionForFeesExpensesTaxes (reflects no deduction for fees, expenses or taxes)
Label rr_AverageAnnualReturnLabel S&P 500® Equal Weight Index Financials Total Return (reflects no deduction for fees, expenses or taxes)
1 Year rr_AverageAnnualReturnYear01 (0.80%)
5 Years rr_AverageAnnualReturnYear05 11.86%
Since Inception rr_AverageAnnualReturnSinceInception 1.44%
Inception Date rr_AverageAnnualReturnInceptionDate Nov. 01, 2006
Guggenheim Broad Market and Sector Equal Weight ETFs | Guggenheim S&P 500® Equal Weight Financials ETF | S&P 500 Index Financials Total Return  
Prospectus: rr_ProspectusTable  
Index No Deduction for Fees, Expenses, Taxes [Text] rr_IndexNoDeductionForFeesExpensesTaxes (reflects no deduction for fees, expenses or taxes)
Label rr_AverageAnnualReturnLabel S&P 500® Index Financials Total Return (reflects no deduction for fees, expenses or taxes)
1 Year rr_AverageAnnualReturnYear01 (1.53%)
5 Years rr_AverageAnnualReturnYear05 10.45%
Since Inception rr_AverageAnnualReturnSinceInception (2.04%)
Inception Date rr_AverageAnnualReturnInceptionDate Nov. 01, 2006
Guggenheim Broad Market and Sector Equal Weight ETFs | Guggenheim S&P 500® Equal Weight Financials ETF | Guggenheim S&P 500® Equal Weight Financials ETF  
Prospectus: rr_ProspectusTable  
Trading Symbol dei_TradingSymbol RYF
Shareholder Fee, Other rr_ShareholderFeeOther none
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.40%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets none [12]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 0.40%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 41
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 129
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 225
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 506
Annual Return 2007 rr_AnnualReturn2007 (18.26%)
Annual Return 2008 rr_AnnualReturn2008 (54.81%)
Annual Return 2009 rr_AnnualReturn2009 30.54%
Annual Return 2010 rr_AnnualReturn2010 22.84%
Annual Return 2011 rr_AnnualReturn2011 (12.59%)
Annual Return 2012 rr_AnnualReturn2012 25.27%
Annual Return 2013 rr_AnnualReturn2013 37.73%
Annual Return 2014 rr_AnnualReturn2014 14.65%
Annual Return 2015 rr_AnnualReturn2015 (1.19%)
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Highest Quarter Return
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Jun. 30, 2009
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 40.11%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Lowest Quarter Return
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2008
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (36.94%)
Label rr_AverageAnnualReturnLabel Return Before Taxes
1 Year rr_AverageAnnualReturnYear01 (1.19%)
5 Years rr_AverageAnnualReturnYear05 11.30%
Since Inception rr_AverageAnnualReturnSinceInception 0.67%
Inception Date rr_AverageAnnualReturnInceptionDate Nov. 01, 2006
Guggenheim Broad Market and Sector Equal Weight ETFs | Guggenheim S&P 500® Equal Weight Financials ETF | Guggenheim S&P 500® Equal Weight Financials ETF | After Taxes on Distributions  
Prospectus: rr_ProspectusTable  
Label rr_AverageAnnualReturnLabel Return After Taxes on Distributions
1 Year rr_AverageAnnualReturnYear01 (2.12%)
5 Years rr_AverageAnnualReturnYear05 10.46%
Since Inception rr_AverageAnnualReturnSinceInception (0.06%)
Inception Date rr_AverageAnnualReturnInceptionDate Nov. 01, 2006
Guggenheim Broad Market and Sector Equal Weight ETFs | Guggenheim S&P 500® Equal Weight Financials ETF | Guggenheim S&P 500® Equal Weight Financials ETF | After Taxes on Distributions and Sales  
Prospectus: rr_ProspectusTable  
Label rr_AverageAnnualReturnLabel Return After Taxes on Distributions and Sale of Fund Shares
1 Year rr_AverageAnnualReturnYear01 (0.68%)
5 Years rr_AverageAnnualReturnYear05 8.57%
Since Inception rr_AverageAnnualReturnSinceInception 0.16%
Inception Date rr_AverageAnnualReturnInceptionDate Nov. 01, 2006
Guggenheim Broad Market and Sector Equal Weight ETFs | Guggenheim S&P 500® Equal Weight Health Care ETF  
Prospectus: rr_ProspectusTable  
Risk/Return [Heading] rr_RiskReturnHeading GUGGENHEIM S&P 500® EQUAL WEIGHT HEALTH CARE ETF (RYH)
Objective [Heading] rr_ObjectiveHeading INVESTMENT OBJECTIVE
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock
The investment objective of the Guggenheim S&P 500® Equal Weight Health Care ETF (the “Fund”) is to replicate as closely as possible, before fees and expenses, the performance of the S&P 500® Equal Weight Index Health Care Total Return (the “Underlying Index”).
Expense [Heading] rr_ExpenseHeading FEES AND EXPENSES OF THE FUND
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock
The table below describes the fees and expenses that you may pay if you buy and hold shares of the Fund. Most investors also will incur customary brokerage commissions when buying or selling shares of the Fund, which are not reflected in the table or the Example. If commissions were included in the table and the Example, the costs shown would be higher.
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption Shareholder Fees (fees paid directly from your investment)
Operating Expenses Caption [Text] rr_OperatingExpensesCaption Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading PORTFOLIO TURNOVER
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock
The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in Total Annual Fund Operating Expenses or in the Example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 22% of the average value of its portfolio. However, the Fund’s portfolio turnover rate is calculated without regard to cash instruments, most derivatives and securities received or delivered as a result of in-kind creations and redemptions of the Fund’s shares. If such instruments were included, the Fund’s portfolio turnover rate might be significantly higher.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 22.00%
Expense Exchange Traded Fund Commissions [Text] rr_ExpenseExchangeTradedFundCommissions Most investors also will incur customary brokerage commissions when buying or selling shares of the Fund, which are not reflected in the table or the Example.
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 funds.
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 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:
Strategy [Heading] rr_StrategyHeading PRINCIPAL INVESTMENT STRATEGIES
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock
The Fund invests primarily in equity securities to meet its investment objective of replicating the Underlying Index as closely as possible, before fees and expenses. The Underlying Index is an unmanaged equal weighted version of the S&P 500® Health Care Index that consists of the common stocks of the following industries: health care equipment and supplies, health care providers and services, and biotechnology and pharmaceuticals that comprise the Health Care sector of the S&P 500® Index. As of December 31, 2015, the Underlying Index included companies with a capitalization range of $3 billion to $284.3 billion. In general, the equal weighting provided by the Underlying Index provides equal representation for all securities at the Underlying Index’s rebalance interval(s), thereby providing broader exposure to the majority of securities in the Underlying Index than typically may be found in the Underlying Index’s market capitalization weighted counterpart.

The Fund uses a passive management strategy, known as “replication,” to track the performance of the Underlying Index. “Replication” refers to investing in substantially all of the securities in the Underlying Index in approximately the same proportions as in the Underlying Index. Under normal circumstances, the Fund will invest at least 90% of its net assets, plus any borrowings for investment purposes, in the equity securities included in the Underlying Index. The Advisor expects that, over time, the correlation between the Fund’s performance and that of the Underlying Index, before fees and expenses, will be 95% or better. A figure of 100% would indicate perfect correlation. The Advisor monitors the Fund’s tracking of the Underlying Index and seeks to maintain an appropriate correlation. The Advisor rebalances the Fund’s portfolio at the same rebalance interval(s) utilized by the Underlying Index.

As long as the Fund invests at least 90% of its total assets in securities included in the Underlying Index, the Fund may hold up to 10% of its assets in investments not included in the Underlying Index, futures contracts, options on futures contracts, options, and swaps related to the Underlying Index, as well as cash and cash equivalents, and shares of investment funds, including money market funds. On a day-to-day basis, the Fund may also hold repurchase agreements, U.S. Government securities or cash equivalents to collateralize its derivatives positions. In an effort to make sure the Fund is fully invested on a day-to-day basis, the Fund may conduct any necessary trading activity at or just prior to the close of the U.S. financial markets.

To the extent the Underlying Index is concentrated in a particular industry the Fund will necessarily be concentrated in that industry. As of the date of this Prospectus, the Fund anticipates that it may have significant exposure to the health care sector. Also as of the date of this Prospectus, the Underlying Index components and thus the Fund's assets, are concentrated in the health care providers and services industry or group of industries, as applicable. The Fund is non-diversified and, therefore, may invest a greater percentage of its net assets in a particular issuer in comparison to a diversified fund.
Risk [Heading] rr_RiskHeading PRINCIPAL RISKS
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock
As with all exchange-traded funds, a shareholder is subject to the risk that his or her investment could lose money. In addition to this risk, the Fund is subject to a number of additional risks that may affect the value of its shares, including:

Authorized Participant Concentration Risk—Only an Authorized Participant may engage in creation or redemption transactions directly with the Fund. The Fund has a limited number of institutions that serve as Authorized Participants. To the extent that these institutions exit the business or are unable to proceed with creation and/or redemption orders with respect to the Fund and no other Authorized Participant is able to step forward to create or redeem, Fund shares may trade at a discount to NAV and possibly face delisting.

Correlation and Tracking Error Risk—A number of factors may affect the Fund’s ability to achieve a high degree of correlation with its Underlying Index, and there can be no guarantee that the Fund will achieve a high degree of correlation with its Underlying Index either on a single trading day or for a longer time period. Factors such as Fund expenses, imperfect correlation between the Fund’s investments and the components of the Underlying Index, rounding of share prices, changes to the composition of the Underlying Index, regulatory policies, a high portfolio turnover rate, and the use of leverage all contribute to tracking error and correlation risk. Failure to achieve a high degree of correlation may prevent the Fund from achieving its investment objective and cause the Fund's performance to be less than you expect.
 
Equity Risk—The Fund is subject to the risk that the value of the equity securities and equity-based derivatives, if any, in the Fund’s portfolio will decline due to volatility in the equity market caused by general market and economic conditions, perceptions regarding particular industries represented in the equity market, or factors relating to specific companies to which the Fund has investment exposure.

ETF Trading Risks—An unanticipated closing of the Exchange or one or more markets on which either the Fund’s shares trade or the Fund’s portfolio holdings trade or the inability of such markets to open for trading during normal business hours, such as in response to a natural disaster or other event causing severe market disruption, could result in a shareholder’s inability to buy or sell shares of the Fund and the Fund’s inability to buy and sell exchange-traded portfolio securities during that period, or in a disruption of the Fund’s creation and redemption process, and may make it difficult for the Fund to accurately price its investments thereby potentially affecting the price at which Fund shares trade in the secondary market. All of these events could adversely affect the performance of the Fund. Trading in Fund shares also may be halted by the Exchange or other markets because of market conditions or other reasons. If a trading halt occurs, a shareholder may temporarily be unable to purchase or sell shares of the Fund. Similarly, the Exchange or other markets may issue trading halts on specific securities or derivatives, which will affect the ability of the Fund to buy or sell certain securities or derivatives. In such circumstances, the Fund may be unable to rebalance its portfolio or accurately price its investments and may incur substantial trading losses.

Shares also may trade on the Exchange or on other markets at prices below their NAV. The NAV of shares will fluctuate with changes in the market value of the Fund’s holdings and the exchange-traded prices of the Fund's shares may not reflect these market values. Although the Fund’s shares are currently listed on the Exchange, there can be no assurance that an active trading market for shares will develop or be maintained.

Industry Concentration Risk—The Fund may concentrate its investments in a limited number of issuers conducting business in the same industry or group of related industries. Market conditions, interest rates, and economic, regulatory, or financial developments could significantly affect a single industry or a group of related industries, and the securities of companies in that industry or group of industries could react similarly to these or other developments.

Liquidity and Valuation Risk—In certain circumstances, it may be difficult for the Fund to purchase and sell a particular investment within a reasonable time at a fair price, or the price at which it has been valued by the Advisor for purposes of the Fund’s NAV, causing the Fund to be less liquid. In addition, the ability of the Fund to assign an accurate daily value to certain investments may be difficult, and the Advisor may be required to fair value the investments.

Market Risk—The Fund's investments in equity securities and derivatives, in general, are subject to market risks that may cause their prices, and therefore the Fund's NAV, to fluctuate over time. Markets are subject to political, regulatory, economic and financial market risks.

Non-Diversification Risk—The Fund is considered non-diversified and can invest a greater portion of its assets in securities of individual issuers than a diversified fund. As a result, changes in the market value of a single issuer could cause greater fluctuations in the value of Fund shares than would occur in a diversified fund.

Passive Investment Risk—The Fund is not actively managed and the Advisor does not attempt to take defensive positions in declining markets. Therefore, the Fund may be subject to greater losses in a declining market than a fund that is actively managed.

Sector Risk—The Sector Risk applicable to the Fund is as follows:

Health Care Sector Risk. The Fund's investments are exposed to issuers conducting business in the health care sector. The Fund is subject to the risk that the securities of such issuers will underperform the market as a whole due to legislative or regulatory changes, adverse market conditions and/or increased competition affecting the health care sector. The prices of the securities of health care sector companies are closely tied to government regulation and approval of their products and services, which can have a significant effect on the price and availability of those products and services.
Risk Lose Money [Text] rr_RiskLoseMoney As with all exchange-traded funds, a shareholder is subject to the risk that his or her investment could lose money.
Risk Nondiversified Status [Text] rr_RiskNondiversifiedStatus Non-Diversification Risk—The Fund is considered non-diversified and can invest a greater portion of its assets in securities of individual issuers than a diversified fund. As a result, changes in the market value of a single issuer could cause greater fluctuations in the value of Fund shares than would occur in a diversified fund.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading PERFORMANCE INFORMATION
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock
The following bar chart shows the performance of the shares of the Fund from year to year. The variability of performance over time provides an indication of the risks of investing in the Fund. The following table shows the performance of the shares of the Fund as an average over different periods of time in comparison to the performance of the Underlying Index and the S&P 500® Index Health Care Total Return, which is the market capitalization weighted version of the Underlying Index. The figures in the bar chart and table assume the reinvestment of dividends and capital gains distributions. Of course, this past performance (before and after taxes) does not necessarily indicate how the Fund will perform in the future.

Updated performance information is available on the Fund’s website at guggenheiminvestments.com or by calling Guggenheim Investments Client Services at 800.820.0888.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The following bar chart shows the performance of the shares of the Fund from year to year. The variability of performance over time provides an indication of the risks of investing in the Fund.
Performance Availability Phone [Text] rr_PerformanceAvailabilityPhone 800.820.0888
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress guggenheiminvestments.com
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Of course, this past performance (before and after taxes) does not necessarily indicate how the Fund will perform in the future.
Bar Chart [Heading] rr_BarChartHeading The performance information shown below is based on a calendar year.
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock
Highest Quarter Return
 
Lowest Quarter Return
Q2 2009
16.64%
 
Q4 2008
-18.80%
Performance Table Heading rr_PerformanceTableHeading AVERAGE ANNUAL TOTAL RETURN (for periods ended December 31, 2015)
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate The after-tax returns presented in the table below are calculated using highest historical individual federal marginal income tax rates and do not reflect the impact of state and local taxes.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred Your actual after-tax returns will depend on your specific tax situation and may differ from those shown below. After-tax returns are not relevant to investors who hold shares of the Fund through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts (“IRAs”).
Performance Table Narrative rr_PerformanceTableNarrativeTextBlock
The after-tax returns presented in the table below are calculated using highest historical individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Your actual after-tax returns will depend on your specific tax situation and may differ from those shown below. After-tax returns are not relevant to investors who hold shares of the Fund through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts (“IRAs”).
Guggenheim Broad Market and Sector Equal Weight ETFs | Guggenheim S&P 500® Equal Weight Health Care ETF | S&P 500 Equal Weight Index Health Care Total Return  
Prospectus: rr_ProspectusTable  
Index No Deduction for Fees, Expenses, Taxes [Text] rr_IndexNoDeductionForFeesExpensesTaxes (reflects no deduction for fees, expenses or taxes)
Label rr_AverageAnnualReturnLabel S&P 500® Equal Weight Index Health Care Total Return (reflects no deduction for fees, expenses or taxes)
1 Year rr_AverageAnnualReturnYear01 8.65%
5 Years rr_AverageAnnualReturnYear05 21.03%
Since Inception rr_AverageAnnualReturnSinceInception 14.58%
Inception Date rr_AverageAnnualReturnInceptionDate Nov. 01, 2006
Guggenheim Broad Market and Sector Equal Weight ETFs | Guggenheim S&P 500® Equal Weight Health Care ETF | S&P 500 Index Health Care Total Return  
Prospectus: rr_ProspectusTable  
Index No Deduction for Fees, Expenses, Taxes [Text] rr_IndexNoDeductionForFeesExpensesTaxes (reflects no deduction for fees, expenses or taxes)
Label rr_AverageAnnualReturnLabel S&P 500® Index Health Care Total Return (reflects no deduction for fees, expenses or taxes)
1 Year rr_AverageAnnualReturnYear01 6.89%
5 Years rr_AverageAnnualReturnYear05 20.29%
Since Inception rr_AverageAnnualReturnSinceInception 11.03%
Inception Date rr_AverageAnnualReturnInceptionDate Nov. 01, 2006
Guggenheim Broad Market and Sector Equal Weight ETFs | Guggenheim S&P 500® Equal Weight Health Care ETF | Guggenheim S&P 500® Equal Weight Health Care ETF  
Prospectus: rr_ProspectusTable  
Trading Symbol dei_TradingSymbol RYH
Shareholder Fee, Other rr_ShareholderFeeOther none
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.40%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets none [13]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 0.40%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 41
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 129
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 225
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 506
Annual Return 2007 rr_AnnualReturn2007 10.81%
Annual Return 2008 rr_AnnualReturn2008 (26.66%)
Annual Return 2009 rr_AnnualReturn2009 38.74%
Annual Return 2010 rr_AnnualReturn2010 10.83%
Annual Return 2011 rr_AnnualReturn2011 6.39%
Annual Return 2012 rr_AnnualReturn2012 20.41%
Annual Return 2013 rr_AnnualReturn2013 40.75%
Annual Return 2014 rr_AnnualReturn2014 29.80%
Annual Return 2015 rr_AnnualReturn2015 8.22%
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Highest Quarter Return
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Jun. 30, 2009
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 16.64%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Lowest Quarter Return
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2008
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (18.80%)
Label rr_AverageAnnualReturnLabel Return Before Taxes
1 Year rr_AverageAnnualReturnYear01 8.22%
5 Years rr_AverageAnnualReturnYear05 20.43%
Since Inception rr_AverageAnnualReturnSinceInception 13.77%
Inception Date rr_AverageAnnualReturnInceptionDate Nov. 01, 2006
Guggenheim Broad Market and Sector Equal Weight ETFs | Guggenheim S&P 500® Equal Weight Health Care ETF | Guggenheim S&P 500® Equal Weight Health Care ETF | After Taxes on Distributions  
Prospectus: rr_ProspectusTable  
Label rr_AverageAnnualReturnLabel Return After Taxes on Distributions
1 Year rr_AverageAnnualReturnYear01 7.99%
5 Years rr_AverageAnnualReturnYear05 20.09%
Since Inception rr_AverageAnnualReturnSinceInception 13.54%
Inception Date rr_AverageAnnualReturnInceptionDate Nov. 01, 2006
Guggenheim Broad Market and Sector Equal Weight ETFs | Guggenheim S&P 500® Equal Weight Health Care ETF | Guggenheim S&P 500® Equal Weight Health Care ETF | After Taxes on Distributions and Sales  
Prospectus: rr_ProspectusTable  
Label rr_AverageAnnualReturnLabel Return After Taxes on Distributions and Sale of Fund Shares
1 Year rr_AverageAnnualReturnYear01 4.65%
5 Years rr_AverageAnnualReturnYear05 16.54%
Since Inception rr_AverageAnnualReturnSinceInception 11.41%
Inception Date rr_AverageAnnualReturnInceptionDate Nov. 01, 2006
Guggenheim Broad Market and Sector Equal Weight ETFs | Guggenheim S&P 500® Equal Weight Industrials ETF  
Prospectus: rr_ProspectusTable  
Risk/Return [Heading] rr_RiskReturnHeading GUGGENHEIM S&P 500® EQUAL WEIGHT INDUSTRIALS ETF (RGI)
Objective [Heading] rr_ObjectiveHeading INVESTMENT OBJECTIVE
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock
The investment objective of Guggenheim S&P 500® Equal Weight Industrials ETF (the “Fund”) is to replicate as closely as possible, before fees and expenses, the performance of the S&P 500® Equal Weight Index Industrials Total Return (the “Underlying Index”).
Expense [Heading] rr_ExpenseHeading FEES AND EXPENSES OF THE FUND
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock
The table below describes the fees and expenses that you may pay if you buy and hold shares of the Fund. Most investors also will incur customary brokerage commissions when buying or selling shares of the Fund, which are not reflected in the table or the Example. If commissions were included in the table and the Example, the costs shown would be higher.
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption Shareholder Fees (fees paid directly from your investment)
Operating Expenses Caption [Text] rr_OperatingExpensesCaption Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading PORTFOLIO TURNOVER
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock
The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in Total Annual Fund Operating Expenses or in the Example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 22% of the average value of its portfolio. However, the Fund’s portfolio turnover rate is calculated without regard to cash instruments, most derivatives and securities received or delivered as a result of in-kind creations and redemptions of the Fund’s shares. If such instruments were included, the Fund’s portfolio turnover rate might be significantly higher.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 22.00%
Expense Exchange Traded Fund Commissions [Text] rr_ExpenseExchangeTradedFundCommissions Most investors also will incur customary brokerage commissions when buying or selling shares of the Fund, which are not reflected in the table or the Example.
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 funds.
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 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:
Strategy [Heading] rr_StrategyHeading PRINCIPAL INVESTMENT STRATEGIES
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock
The Fund invests primarily in equity securities to meet its investment objective of replicating the Underlying Index as closely as possible, before fees and expenses. The Underlying Index is an unmanaged equal weighted version of the S&P 500® Industrials Index that consists of the common stocks of the following industries: aerospace and defense, building products, construction and engineering, electrical equipment, conglomerates, machinery, commercial services and supplies, air freight and logistics, airlines, and marine, road and rail transportation infrastructure that comprise the Industrials sector of the S&P 500® Index. As of December 31, 2015, the Underlying Index included companies with a capitalization range of $3 billion to $314.9 billion. In general, the equal weighting provided by the Underlying Index provides equal representation for all securities at the Underlying Index’s rebalance interval(s), thereby providing broader exposure to the majority of securities in the Underlying Index than typically may be found in the Underlying Index’s market capitalization weighted counterpart.

The Fund uses a passive management strategy, known as “replication,” to track the performance of the Underlying Index. “Replication” refers to investing in substantially all of the securities in the Underlying Index in approximately the same proportions as in the Underlying Index. Under normal circumstances, the Fund will invest at least 90% of its net assets, plus any borrowings for investment purposes, in the equity securities included in the Underlying Index. The Advisor expects that, over time, the correlation between the Fund’s performance and that of the Underlying Index, before fees and expenses, will be 95% or better. A figure of 100% would indicate perfect correlation. The Advisor monitors the Fund’s tracking of the Underlying Index and seeks to maintain an appropriate correlation. The Advisor rebalances the Fund’s portfolio at the same rebalance interval(s) utilized by the Underlying Index.

As long as the Fund invests at least 90% of its total assets in securities included in the Underlying Index, the Fund may hold up to 10% of its assets in investments not included in the Underlying Index, futures contracts, options on futures contracts, options, and swaps related to the Underlying Index, as well as cash and cash equivalents, and shares of investment funds, including money market funds. On a day-to-day basis, the Fund may also hold repurchase agreements, U.S. Government securities or cash equivalents to collateralize its derivatives positions. In an effort to make sure the Fund is fully invested on a day-to-day basis, the Fund may conduct any necessary trading activity at or just prior to the close of the U.S. financial markets.

To the extent the Underlying Index is concentrated in a particular industry the Fund will necessarily be concentrated in that industry. As of the date of this Prospectus, the Fund anticipates that it may have significant exposure to the industrials sector. The Fund is non-diversified and, therefore, may invest a greater percentage of its net assets in a particular issuer in comparison to a diversified fund.
Risk [Heading] rr_RiskHeading PRINCIPAL RISKS
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock
As with all exchange-traded funds, a shareholder is subject to the risk that his or her investment could lose money. In addition to this risk, the Fund is subject to a number of additional risks that may affect the value of its shares, including:

Authorized Participant Concentration Risk—Only an Authorized Participant may engage in creation or redemption transactions directly with the Fund. The Fund has a limited number of institutions that serve as Authorized Participants. To the extent that these institutions exit the business or are unable to proceed with creation and/or redemption orders with respect to the Fund and no other Authorized Participant is able to step forward to create or redeem, Fund shares may trade at a discount to NAV and possibly face delisting.

Correlation and Tracking Error Risk—A number of factors may affect the Fund’s ability to achieve a high degree of correlation with its Underlying Index, and there can be no guarantee that the Fund will achieve a high degree of correlation with its Underlying Index either on a single trading day or for a longer time period. Factors such as Fund expenses, imperfect correlation between the Fund’s investments and the components of the Underlying Index, rounding of share prices, changes to the composition of the Underlying Index, regulatory policies, a high portfolio turnover rate, and the use of leverage all contribute to tracking error and correlation risk. Failure to achieve a high degree of correlation may prevent the Fund from achieving its investment objective and cause the Fund's performance to be less than you expect.
 
Equity Risk—The Fund is subject to the risk that the value of the equity securities and equity-based derivatives, if any, in the Fund’s portfolio will decline due to volatility in the equity market caused by general market and economic conditions, perceptions regarding particular industries represented in the equity market, or factors relating to specific companies to which the Fund has investment exposure.

ETF Trading Risks—An unanticipated closing of the Exchange or one or more markets on which either the Fund’s shares trade or the Fund’s portfolio holdings trade or the inability of such markets to open for trading during normal business hours, such as in response to a natural disaster or other event causing severe market disruption, could result in a shareholder’s inability to buy or sell shares of the Fund and the Fund’s inability to buy and sell exchange-traded portfolio securities during that period, or in a disruption of the Fund’s creation and redemption process, and may make it difficult for the Fund to accurately price its investments thereby potentially affecting the price at which Fund shares trade in the secondary market. All of these events could adversely affect the performance of the Fund. Trading in Fund shares also may be halted by the Exchange or other markets because of market conditions or other reasons. If a trading halt occurs, a shareholder may temporarily be unable to purchase or sell shares of the Fund. Similarly, the Exchange or other markets may issue trading halts on specific securities or derivatives, which will affect the ability of the Fund to buy or sell certain securities or derivatives. In such circumstances, the Fund may be unable to rebalance its portfolio or accurately price its investments and may incur substantial trading losses.

Shares also may trade on the Exchange or on other markets at prices below their NAV. The NAV of shares will fluctuate with changes in the market value of the Fund’s holdings and the exchange-traded prices of the Fund's shares may not reflect these market values. Although the Fund’s shares are currently listed on the Exchange, there can be no assurance that an active trading market for shares will develop or be maintained.

Liquidity and Valuation Risk—In certain circumstances, it may be difficult for the Fund to purchase and sell a particular investment within a reasonable time at a fair price, or the price at which it has been valued by the Advisor for purposes of the Fund’s NAV, causing the Fund to be less liquid. In addition, the ability of the Fund to assign an accurate daily value to certain investments may be difficult, and the Advisor may be required to fair value the investments.

Market Risk—The Fund's investments in equity securities and derivatives, in general, are subject to market risks that may cause their prices, and therefore the Fund's NAV, to fluctuate over time. Markets are subject to political, regulatory, economic and financial market risks.

Non-Diversification Risk—The Fund is considered non-diversified and can invest a greater portion of its assets in securities of individual issuers than a diversified fund. As a result, changes in the market value of a single issuer could cause greater fluctuations in the value of Fund shares than would occur in a diversified fund.

Passive Investment Risk—The Fund is not actively managed and the Advisor does not attempt to take defensive positions in declining markets. Therefore, the Fund may be subject to greater losses in a declining market than a fund that is actively managed.

Sector Risk—The Sector Risk applicable to the Fund is as follows:

Industrials Sector Risk. The Fund's investments are exposed to issuers conducting business in the industrials sector. The Fund is subject to the risk that the securities of such issuers will underperform the market as a whole due to legislative or regulatory changes, adverse market conditions and/or increased competition affecting the industrials sector. The prices of the securities of industrials sector companies are closely tied to commodity prices, exchange rates, import controls and market competition.
Risk Lose Money [Text] rr_RiskLoseMoney As with all exchange-traded funds, a shareholder is subject to the risk that his or her investment could lose money.
Risk Nondiversified Status [Text] rr_RiskNondiversifiedStatus Non-Diversification Risk—The Fund is considered non-diversified and can invest a greater portion of its assets in securities of individual issuers than a diversified fund. As a result, changes in the market value of a single issuer could cause greater fluctuations in the value of Fund shares than would occur in a diversified fund.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading PERFORMANCE INFORMATION
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock
The following bar chart shows the performance of the shares of the Fund from year to year. The variability of performance over time provides an indication of the risks of investing in the Fund. The following table shows the performance of the shares of the Fund as an average over different periods of time in comparison to the performance of the Underlying Index and the S&P 500® Index Industrials Total Return, which is the market capitalization weighted version of the Underlying Index. The figures in the bar chart and table assume the reinvestment of dividends and capital gains distributions. Of course, this past performance (before and after taxes) does not necessarily indicate how the Fund will perform in the future.

Updated performance information is available on the Fund’s website at guggenheiminvestments.com or by calling Guggenheim Investments Client Services at 800.820.0888.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The following bar chart shows the performance of the shares of the Fund from year to year. The variability of performance over time provides an indication of the risks of investing in the Fund.
Performance Availability Phone [Text] rr_PerformanceAvailabilityPhone 800.820.0888
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress guggenheiminvestments.com
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Of course, this past performance (before and after taxes) does not necessarily indicate how the Fund will perform in the future.
Bar Chart [Heading] rr_BarChartHeading The performance information shown below is based on a calendar year.
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock
Highest Quarter Return
 
Lowest Quarter Return
Q2 2009
22.77%
 
Q4 2008
-23.01%
Performance Table Heading rr_PerformanceTableHeading AVERAGE ANNUAL TOTAL RETURN (for periods ended December 31, 2015)
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate The after-tax returns presented in the table below are calculated using highest historical individual federal marginal income tax rates and do not reflect the impact of state and local taxes.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred Your actual after-tax returns will depend on your specific tax situation and may differ from those shown below. After-tax returns are not relevant to investors who hold shares of the Fund through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts (“IRAs”).
Performance Table Narrative rr_PerformanceTableNarrativeTextBlock
The after-tax returns presented in the table below are calculated using highest historical individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Your actual after-tax returns will depend on your specific tax situation and may differ from those shown below. After-tax returns are not relevant to investors who hold shares of the Fund through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts (“IRAs”).
Guggenheim Broad Market and Sector Equal Weight ETFs | Guggenheim S&P 500® Equal Weight Industrials ETF | S&P 500 Equal Weight Index Industrials Total Return  
Prospectus: rr_ProspectusTable  
Index No Deduction for Fees, Expenses, Taxes [Text] rr_IndexNoDeductionForFeesExpensesTaxes (reflects no deduction for fees, expenses or taxes)
Label rr_AverageAnnualReturnLabel S&P 500® Equal Weight Index Industrials Total Return (reflects no deduction for fees, expenses or taxes)
1 Year rr_AverageAnnualReturnYear01 (6.50%)
5 Years rr_AverageAnnualReturnYear05 11.14%
Since Inception rr_AverageAnnualReturnSinceInception 8.41%
Inception Date rr_AverageAnnualReturnInceptionDate Nov. 01, 2006
Guggenheim Broad Market and Sector Equal Weight ETFs | Guggenheim S&P 500® Equal Weight Industrials ETF | S&P 500 Index Industrials Total Return  
Prospectus: rr_ProspectusTable  
Index No Deduction for Fees, Expenses, Taxes [Text] rr_IndexNoDeductionForFeesExpensesTaxes (reflects no deduction for fees, expenses or taxes)
Label rr_AverageAnnualReturnLabel S&P 500® Index Industrials Total Return (reflects no deduction for fees, expenses or taxes)
1 Year rr_AverageAnnualReturnYear01 (2.53%)
5 Years rr_AverageAnnualReturnYear05 11.54%
Since Inception rr_AverageAnnualReturnSinceInception 6.97%
Inception Date rr_AverageAnnualReturnInceptionDate Nov. 01, 2006
Guggenheim Broad Market and Sector Equal Weight ETFs | Guggenheim S&P 500® Equal Weight Industrials ETF | Guggenheim S&P 500® Equal Weight Industrials ETF  
Prospectus: rr_ProspectusTable  
Trading Symbol dei_TradingSymbol RGI
Shareholder Fee, Other rr_ShareholderFeeOther none
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.40%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets none [14]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 0.40%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 41
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 129
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 225
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 506
Annual Return 2007 rr_AnnualReturn2007 15.52%
Annual Return 2008 rr_AnnualReturn2008 (37.70%)
Annual Return 2009 rr_AnnualReturn2009 28.57%
Annual Return 2010 rr_AnnualReturn2010 26.35%
Annual Return 2011 rr_AnnualReturn2011 (1.98%)
Annual Return 2012 rr_AnnualReturn2012 16.51%
Annual Return 2013 rr_AnnualReturn2013 39.47%
Annual Return 2014 rr_AnnualReturn2014 11.59%
Annual Return 2015 rr_AnnualReturn2015 (6.84%)
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Highest Quarter Return
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Jun. 30, 2009
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 22.77%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Lowest Quarter Return
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2008
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (23.01%)
Label rr_AverageAnnualReturnLabel Return Before Taxes
1 Year rr_AverageAnnualReturnYear01 (6.84%)
5 Years rr_AverageAnnualReturnYear05 10.61%
Since Inception rr_AverageAnnualReturnSinceInception 7.86%
Inception Date rr_AverageAnnualReturnInceptionDate Nov. 01, 2006
Guggenheim Broad Market and Sector Equal Weight ETFs | Guggenheim S&P 500® Equal Weight Industrials ETF | Guggenheim S&P 500® Equal Weight Industrials ETF | After Taxes on Distributions  
Prospectus: rr_ProspectusTable  
Label rr_AverageAnnualReturnLabel Return After Taxes on Distributions
1 Year rr_AverageAnnualReturnYear01 (7.43%)
5 Years rr_AverageAnnualReturnYear05 9.93%
Since Inception rr_AverageAnnualReturnSinceInception 7.12%
Inception Date rr_AverageAnnualReturnInceptionDate Nov. 01, 2006
Guggenheim Broad Market and Sector Equal Weight ETFs | Guggenheim S&P 500® Equal Weight Industrials ETF | Guggenheim S&P 500® Equal Weight Industrials ETF | After Taxes on Distributions and Sales  
Prospectus: rr_ProspectusTable  
Label rr_AverageAnnualReturnLabel Return After Taxes on Distributions and Sale of Fund Shares
1 Year rr_AverageAnnualReturnYear01 (3.87%)
5 Years rr_AverageAnnualReturnYear05 8.10%
Since Inception rr_AverageAnnualReturnSinceInception 5.96%
Inception Date rr_AverageAnnualReturnInceptionDate Nov. 01, 2006
Guggenheim Broad Market and Sector Equal Weight ETFs | Guggenheim S&P 500® Equal Weight Materials ETF  
Prospectus: rr_ProspectusTable  
Risk/Return [Heading] rr_RiskReturnHeading GUGGENHEIM S&P 500® EQUAL WEIGHT MATERIALS ETF (RTM)
Objective [Heading] rr_ObjectiveHeading INVESTMENT OBJECTIVE
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock
The investment objective of Guggenheim S&P 500® Equal Weight Materials ETF (the “Fund”) is to replicate as closely as possible, before fees and expenses, the performance of the S&P 500® Equal Weight Index Materials Total Return (the “Underlying Index”).
Expense [Heading] rr_ExpenseHeading FEES AND EXPENSES OF THE FUND
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock
The table below describes the fees and expenses that you may pay if you buy and hold shares of the Fund. Most investors also will incur customary brokerage commissions when buying or selling shares of the Fund, which are not reflected in the table or the Example. If commissions were included in the table and the Example, the costs shown would be higher.
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption Shareholder Fees (fees paid directly from your investment)
Operating Expenses Caption [Text] rr_OperatingExpensesCaption Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading PORTFOLIO TURNOVER
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock
The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in Total Annual Fund Operating Expenses or in the Example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 27% of the average value of its portfolio. However, the Fund’s portfolio turnover rate is calculated without regard to cash instruments, most derivatives and securities received or delivered as a result of in-kind creations and redemptions of the Fund’s shares. If such instruments were included, the Fund’s portfolio turnover rate might be significantly higher.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 27.00%
Expense Exchange Traded Fund Commissions [Text] rr_ExpenseExchangeTradedFundCommissions Most investors also will incur customary brokerage commissions when buying or selling shares of the Fund, which are not reflected in the table or the Example.
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 funds.
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 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:
Strategy [Heading] rr_StrategyHeading PRINCIPAL INVESTMENT STRATEGIES
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock
The Fund invests primarily in equity securities to meet its investment objective of replicating the Underlying Index as closely as possible, before fees and expenses. The Underlying Index is an unmanaged equal weighted version of the S&P 500® Materials Index that consists of the common stocks of the following industries: chemicals, construction materials, containers and packaging, metals and mining, and paper and forest products that comprise the Materials sector of the S&P 500® Index. As of December 31, 2015, the Underlying Index included companies with a capitalization range of $2.8 billion to $59.6 billion. In general, the equal weighting provided by the Underlying Index provides equal representation for all securities at the Underlying Index’s rebalance interval(s), thereby providing broader exposure to the majority of securities in the Underlying Index than typically may be found in the Underlying Index’s market capitalization weighted counterpart.

The Fund uses a passive management strategy, known as “replication,” to track the performance of the Underlying Index. “Replication” refers to investing in substantially all of the securities in the Underlying Index in approximately the same proportions as in the Underlying Index. Under normal circumstances, the Fund will invest at least 90% of its net assets, plus any borrowings for investment purposes, in the equity securities included in the Underlying Index. The Advisor expects that, over time, the correlation between the Fund’s performance and that of the Underlying Index, before fees and expenses, will be 95% or better. A figure of 100% would indicate perfect correlation. The Advisor monitors the Fund’s tracking of the Underlying Index and seeks to maintain an appropriate correlation. The Advisor rebalances the Fund’s portfolio at the same rebalance interval(s) utilized by the Underlying Index.

As long as the Fund invests at least 90% of its total assets in securities included in the Underlying Index, the Fund may hold up to 10% of its assets in investments not included in the Underlying Index, futures contracts, options on futures contracts, options, and swaps related to the Underlying Index, as well as cash and cash equivalents, and shares of investment funds, including money market funds. On a day-to-day basis, the Fund may also hold repurchase agreements, U.S. Government securities or cash equivalents to collateralize its derivatives positions. In an effort to make sure the Fund is fully invested on a day-to-day basis, the Fund may conduct any necessary trading activity at or just prior to the close of the U.S. financial markets.

To the extent the Underlying Index is concentrated in a particular industry the Fund will necessarily be concentrated in that industry. As of the date of this Prospectus, the Fund anticipates that it may have significant exposure to the materials sector. Also as of the date of this Prospectus, the Underlying Index components and thus the Fund's assets, are concentrated in the chemicals industry or group of industries, as applicable. The Fund is non-diversified and, therefore, may invest a greater percentage of its net assets in a particular issuer in comparison to a diversified fund.
Risk [Heading] rr_RiskHeading PRINCIPAL RISKS
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock
As with all exchange-traded funds, a shareholder is subject to the risk that his or her investment could lose money. In addition to this risk, the Fund is subject to a number of additional risks that may affect the value of its shares, including:

Authorized Participant Concentration Risk—Only an Authorized Participant may engage in creation or redemption transactions directly with the Fund. The Fund has a limited number of institutions that serve as Authorized Participants. To the extent that these institutions exit the business or are unable to proceed with creation and/or redemption orders with respect to the Fund and no other Authorized Participant is able to step forward to create or redeem, Fund shares may trade at a discount to NAV and possibly face delisting.

Correlation and Tracking Error Risk—A number of factors may affect the Fund’s ability to achieve a high degree of correlation with its Underlying Index, and there can be no guarantee that the Fund will achieve a high degree of correlation with its Underlying Index either on a single trading day or for a longer time period. Factors such as Fund expenses, imperfect correlation between the Fund’s investments and the components of the Underlying Index, rounding of share prices, changes to the composition of the Underlying Index, regulatory policies, a high portfolio turnover rate, and the use of leverage all contribute to tracking error and correlation risk. Failure to achieve a high degree of correlation may prevent the Fund from achieving its investment objective and cause the Fund's performance to be less than you expect.
 
Equity Risk—The Fund is subject to the risk that the value of the equity securities and equity-based derivatives, if any, in the Fund’s portfolio will decline due to volatility in the equity market caused by general market and economic conditions, perceptions regarding particular industries represented in the equity market, or factors relating to specific companies to which the Fund has investment exposure.

ETF Trading Risks—An unanticipated closing of the Exchange or one or more markets on which either the Fund’s shares trade or the Fund’s portfolio holdings trade or the inability of such markets to open for trading during normal business hours, such as in response to a natural disaster or other event causing severe market disruption, could result in a shareholder’s inability to buy or sell shares of the Fund and the Fund’s inability to buy and sell exchange-traded portfolio securities during that period, or in a disruption of the Fund’s creation and redemption process, and may make it difficult for the Fund to accurately price its investments thereby potentially affecting the price at which Fund shares trade in the secondary market. All of these events could adversely affect the performance of the Fund. Trading in Fund shares also may be halted by the Exchange or other markets because of market conditions or other reasons. If a trading halt occurs, a shareholder may temporarily be unable to purchase or sell shares of the Fund. Similarly, the Exchange or other markets may issue trading halts on specific securities or derivatives, which will affect the ability of the Fund to buy or sell certain securities or derivatives. In such circumstances, the Fund may be unable to rebalance its portfolio or accurately price its investments and may incur substantial trading losses.

Shares also may trade on the Exchange or on other markets at prices below their NAV. The NAV of shares will fluctuate with changes in the market value of the Fund’s holdings and the exchange-traded prices of the Fund's shares may not reflect these market values. Although the Fund’s shares are currently listed on the Exchange, there can be no assurance that an active trading market for shares will develop or be maintained.

Industry Concentration Risk—The Fund may concentrate its investments in a limited number of issuers conducting business in the same industry or group of related industries. Market conditions, interest rates, and economic, regulatory, or financial developments could significantly affect a single industry or a group of related industries, and the securities of companies in that industry or group of industries could react similarly to these or other developments.
 
Liquidity and Valuation Risk—In certain circumstances, it may be difficult for the Fund to purchase and sell a particular investment within a reasonable time at a fair price, or the price at which it has been valued by the Advisor for purposes of the Fund’s NAV, causing the Fund to be less liquid. In addition, the ability of the Fund to assign an accurate daily value to certain investments may be difficult, and the Advisor may be required to fair value the investments.

Market Risk—The Fund's investments in equity securities and derivatives, in general, are subject to market risks that may cause their prices, and therefore the Fund's NAV, to fluctuate over time. Markets are subject to political, regulatory, economic and financial market risks.

Non-Diversification Risk—The Fund is considered non-diversified and can invest a greater portion of its assets in securities of individual issuers than a diversified fund. As a result, changes in the market value of a single issuer could cause greater fluctuations in the value of Fund shares than would occur in a diversified fund.

Passive Investment Risk—The Fund is not actively managed and the Advisor does not attempt to take defensive positions in declining markets. Therefore, the Fund may be subject to greater losses in a declining market than a fund that is actively managed.

Sector Risk—The Sector Risk applicable to the Fund is as follows:

Materials Sector Risk. The Fund's investments are exposed to issuers conducting business in the materials sector. The Fund is subject to the risk that the securities of such issuers will underperform the market as a whole due to legislative or regulatory changes, adverse market conditions and/or increased competition affecting the materials sector. The prices of the securities of materials companies are closely tied to commodity prices, exchange rates, import controls and market competition.
Risk Lose Money [Text] rr_RiskLoseMoney As with all exchange-traded funds, a shareholder is subject to the risk that his or her investment could lose money.
Risk Nondiversified Status [Text] rr_RiskNondiversifiedStatus Non-Diversification Risk—The Fund is considered non-diversified and can invest a greater portion of its assets in securities of individual issuers than a diversified fund. As a result, changes in the market value of a single issuer could cause greater fluctuations in the value of Fund shares than would occur in a diversified fund.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading PERFORMANCE INFORMATION
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock
The following bar chart shows the performance of the shares of the Fund from year to year. The variability of performance over time provides an indication of the risks of investing in the Fund. The following table shows the performance of the shares of the Fund as an average over different periods of time in comparison to the performance of the Underlying Index and the S&P 500® Index Materials Total Return, which is the market capitalization weighted version of the Underlying Index. The figures in the bar chart and table assume the reinvestment of dividends and capital gains distributions. Of course, this past performance (before and after taxes) does not necessarily indicate how the Fund will perform in the future.
 
Updated performance information is available on the Fund’s website at guggenheiminvestments.com or by calling Guggenheim Investments Client Services at 800.820.0888.

Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The following bar chart shows the performance of the shares of the Fund from year to year. The variability of performance over time provides an indication of the risks of investing in the Fund.
Performance Availability Phone [Text] rr_PerformanceAvailabilityPhone 800.820.0888
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress guggenheiminvestments.com
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Of course, this past performance (before and after taxes) does not necessarily indicate how the Fund will perform in the future.
Bar Chart [Heading] rr_BarChartHeading The performance information shown below is based on a calendar year.
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock
Highest Quarter Return
 
Lowest Quarter Return
Q2 2009
37.59%
 
Q4 2008
-27.41%
Performance Table Heading rr_PerformanceTableHeading AVERAGE ANNUAL TOTAL RETURN (for periods ended December 31, 2015)
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate The after-tax returns presented in the table below are calculated using highest historical individual federal marginal income tax rates and do not reflect the impact of state and local taxes.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred Your actual after-tax returns will depend on your specific tax situation and may differ from those shown below. After-tax returns are not relevant to investors who hold shares of the Fund through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts (“IRAs”).
Performance Table Narrative rr_PerformanceTableNarrativeTextBlock
The after-tax returns presented in the table below are calculated using highest historical individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Your actual after-tax returns will depend on your specific tax situation and may differ from those shown below. After-tax returns are not relevant to investors who hold shares of the Fund through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts (“IRAs”).
Guggenheim Broad Market and Sector Equal Weight ETFs | Guggenheim S&P 500® Equal Weight Materials ETF | S&P 500 Equal Weight Index Materials Total Return  
Prospectus: rr_ProspectusTable  
Index No Deduction for Fees, Expenses, Taxes [Text] rr_IndexNoDeductionForFeesExpensesTaxes (reflects no deduction for fees, expenses or taxes)
Label rr_AverageAnnualReturnLabel S&P 500® Equal Weight Index Materials Total Return (reflects no deduction for fees, expenses or taxes)
1 Year rr_AverageAnnualReturnYear01 (7.43%)
5 Years rr_AverageAnnualReturnYear05 5.99%
Since Inception rr_AverageAnnualReturnSinceInception 7.68%
Inception Date rr_AverageAnnualReturnInceptionDate Nov. 01, 2006
Guggenheim Broad Market and Sector Equal Weight ETFs | Guggenheim S&P 500® Equal Weight Materials ETF | S&P 500 Index Materials Total Return  
Prospectus: rr_ProspectusTable  
Index No Deduction for Fees, Expenses, Taxes [Text] rr_IndexNoDeductionForFeesExpensesTaxes (reflects no deduction for fees, expenses or taxes)
Label rr_AverageAnnualReturnLabel S&P 500® Index Materials Total Return (reflects no deduction for fees, expenses or taxes)
1 Year rr_AverageAnnualReturnYear01 (8.38%)
5 Years rr_AverageAnnualReturnYear05 5.00%
Since Inception rr_AverageAnnualReturnSinceInception 5.52%
Inception Date rr_AverageAnnualReturnInceptionDate Nov. 01, 2006
Guggenheim Broad Market and Sector Equal Weight ETFs | Guggenheim S&P 500® Equal Weight Materials ETF | Guggenheim S&P 500® Equal Weight Materials ETF  
Prospectus: rr_ProspectusTable  
Trading Symbol dei_TradingSymbol RTM
Shareholder Fee, Other rr_ShareholderFeeOther none
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.40%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets none [15]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 0.40%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 41
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 129
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 225
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 506
Annual Return 2007 rr_AnnualReturn2007 10.16%
Annual Return 2008 rr_AnnualReturn2008 (41.44%)
Annual Return 2009 rr_AnnualReturn2009 67.12%
Annual Return 2010 rr_AnnualReturn2010 23.29%
Annual Return 2011 rr_AnnualReturn2011 (9.34%)
Annual Return 2012 rr_AnnualReturn2012 17.64%
Annual Return 2013 rr_AnnualReturn2013 24.66%
Annual Return 2014 rr_AnnualReturn2014 6.66%
Annual Return 2015 rr_AnnualReturn2015 (7.87%)
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Highest Quarter Return
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Jun. 30, 2009
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 37.59%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Lowest Quarter Return
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2008
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (27.41%)
Label rr_AverageAnnualReturnLabel Return Before Taxes
1 Year rr_AverageAnnualReturnYear01 (7.87%)
5 Years rr_AverageAnnualReturnYear05 5.49%
Since Inception rr_AverageAnnualReturnSinceInception 6.98%
Inception Date rr_AverageAnnualReturnInceptionDate Nov. 01, 2006
Guggenheim Broad Market and Sector Equal Weight ETFs | Guggenheim S&P 500® Equal Weight Materials ETF | Guggenheim S&P 500® Equal Weight Materials ETF | After Taxes on Distributions  
Prospectus: rr_ProspectusTable  
Label rr_AverageAnnualReturnLabel Return After Taxes on Distributions
1 Year rr_AverageAnnualReturnYear01 (8.48%)
5 Years rr_AverageAnnualReturnYear05 4.84%
Since Inception rr_AverageAnnualReturnSinceInception 6.26%
Inception Date rr_AverageAnnualReturnInceptionDate Nov. 01, 2006
Guggenheim Broad Market and Sector Equal Weight ETFs | Guggenheim S&P 500® Equal Weight Materials ETF | Guggenheim S&P 500® Equal Weight Materials ETF | After Taxes on Distributions and Sales  
Prospectus: rr_ProspectusTable  
Label rr_AverageAnnualReturnLabel Return After Taxes on Distributions and Sale of Fund Shares
1 Year rr_AverageAnnualReturnYear01 (4.45%)
5 Years rr_AverageAnnualReturnYear05 3.99%
Since Inception rr_AverageAnnualReturnSinceInception 5.26%
Inception Date rr_AverageAnnualReturnInceptionDate Nov. 01, 2006
Guggenheim Broad Market and Sector Equal Weight ETFs | Guggenheim S&P 500® Equal Weight Real Estate ETF  
Prospectus: rr_ProspectusTable  
Risk/Return [Heading] rr_RiskReturnHeading GUGGENHEIM S&P 500® EQUAL WEIGHT REAL ESTATE ETF (EWRE)
Objective [Heading] rr_ObjectiveHeading INVESTMENT OBJECTIVE
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock
The investment objective of the Guggenheim S&P 500® Equal Weight Real Estate ETF (the “Fund”) is to replicate as closely as possible, before fees and expenses, the performance of the S&P 500® Equal Weight Real Estate Index (the “Underlying Index”).
Expense [Heading] rr_ExpenseHeading FEES AND EXPENSES OF THE FUND
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock
The table below describes the fees and expenses that you may pay if you buy and hold shares of the Fund. Most investors also will incur customary brokerage commissions when buying or selling shares of the Fund, which are not reflected in the table or the Example. If commissions were included in the table and the Example, the costs shown would be higher.
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption Shareholder Fees (fees paid directly from your investment)
Operating Expenses Caption [Text] rr_OperatingExpensesCaption Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading PORTFOLIO TURNOVER
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock
The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in Total Annual Fund Operating Expenses or in the Example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 5% of the average value of its portfolio. However, the Fund’s portfolio turnover rate is calculated without regard to cash instruments, most derivatives and securities received or delivered as a result of in-kind creations and redemptions of the Fund’s shares. If such instruments were included, the Fund’s portfolio turnover rate might be significantly higher.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 5.00%
Expense Exchange Traded Fund Commissions [Text] rr_ExpenseExchangeTradedFundCommissions Most investors also will incur customary brokerage commissions when buying or selling shares of the Fund, which are not reflected in the table or the Example.
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 funds.
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 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:
Strategy [Heading] rr_StrategyHeading PRINCIPAL INVESTMENT STRATEGIES
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock
The Fund invests primarily in equity securities to meet its investment objective of replicating the Underlying Index as closely as possible, before fees and expenses. The Underlying Index is an equal weighted version of the S&P 500® Real Estate Index that consists of equity Real Estate Investment Trusts (REITs) and common stock of companies that are classified as Diversified Real Estate Activities Companies, Real Estate Operating Companies, Real Estate Development and Real Estate Services Companies and companies that comprise the Real Estate sector of the S&P 500® Index. As of December 31, 2015, the Underlying Index included 25 component securities with capitalizations ranging from $5.7 billion to $60.2 billion. In general, the equal weighting of the Underlying Index provides equal representation for all securities at the Underlying Index’s rebalance interval(s), thereby providing broader exposure to the majority of securities in the Underlying Index than typically may be found in the Underlying Index’s market capitalization weighted counterpart.

The Fund uses a passive management strategy, known as “replication,” to track the performance of the Underlying Index. “Replication” refers to investing in substantially all of the securities in the Underlying Index in approximately the same proportions as in the Underlying Index. Under normal circumstances, the Fund will invest at least 80% of its net assets, plus any borrowings for investment purposes, in the equity securities included in the Underlying Index. The Advisor expects that, over time, the correlation between the Fund’s performance and that of the Underlying Index, before fees and expenses, will be 95% or better. A figure of 100% would indicate perfect correlation. The Advisor monitors the Fund’s tracking of the Underlying Index and seeks to maintain an appropriate correlation. The Advisor rebalances the Fund’s portfolio at the same rebalance interval(s) utilized by the Underlying Index.

As long as the Fund invests at least 80% of its total assets in securities included in the Underlying Index, the Fund may hold up to 20% of its assets in investments not included in the Underlying Index, futures contracts, options on futures contracts, options, and swaps related to the Underlying Index, as well as cash and cash equivalents, and shares of investment funds, including money market funds. On a day-to-day basis, the Fund may also hold repurchase agreements, U.S. Government securities or cash equivalents to collateralize its derivatives positions. In an effort to make sure the Fund is fully invested on a day-to-day basis, the Fund may conduct any necessary trading activity at or just prior to the close of the U.S. financial markets.

To the extent the Underlying Index is concentrated in a particular industry the Fund will necessarily be concentrated in that industry. As of the date of this Prospectus, the Fund anticipates that it may have significant exposure to the financials and real estate sectors. Also, as of the date of this Prospectus, the Underlying Index components and thus the Fund's assets, are concentrated in the real estate industry or group of industries, as applicable. The Fund is non-diversified and, therefore, may invest a greater percentage of its net assets in a particular issuer in comparison to a diversified fund.
Risk [Heading] rr_RiskHeading PRINCIPAL RISKS
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock
As with all exchange-traded funds, a shareholder is subject to the risk that his or her investment could lose money. In addition to this risk, the Fund is subject to a number of additional risks that may affect the value of its shares, including:

Authorized Participant Concentration Risk—Only an Authorized Participant may engage in creation or redemption transactions directly with the Fund. The Fund has a limited number of institutions that serve as Authorized Participants. To the extent that these institutions exit the business or are unable to proceed with creation and/or redemption orders with respect to the Fund and no other Authorized Participant is able to step forward to create or redeem, Fund shares may trade at a discount to NAV and possibly face delisting.

Correlation and Tracking Error Risk—A number of factors may affect the Fund’s ability to achieve a high degree of correlation with its Underlying Index, and there can be no guarantee that the Fund will achieve a high degree of correlation with its Underlying Index either on a single trading day or for a longer time period. Factors such as Fund expenses, imperfect correlation between the Fund’s investments and the components of the Underlying Index, rounding of share prices, changes to the composition of the Underlying Index, regulatory policies, a high portfolio turnover rate, and the use of leverage all contribute to tracking error and correlation risk. Failure to achieve a high degree of correlation may prevent the Fund from achieving its investment objective and cause the Fund's performance to be less than you expect.
 
Equity Risk—The Fund is subject to the risk that the value of the equity securities and equity-based derivatives, if any, in the Fund’s portfolio will decline due to volatility in the equity market caused by general market and economic conditions, perceptions regarding particular industries represented in the equity market, or factors relating to specific companies to which the Fund has investment exposure.

ETF Trading Risks—An unanticipated closing of the Exchange or one or more markets on which either the Fund’s shares trade or the Fund’s portfolio holdings trade or the inability of such markets to open for trading during normal business hours, such as in response to a natural disaster or other event causing severe market disruption, could result in a shareholder’s inability to buy or sell shares of the Fund and the Fund’s inability to buy and sell exchange-traded portfolio securities during that period, or in a disruption of the Fund’s creation and redemption process, and may make it difficult for the Fund to accurately price its investments thereby potentially affecting the price at which Fund shares trade in the secondary market. All of these events could adversely affect the performance of the Fund. Trading in Fund shares also may be halted by the Exchange or other markets because of market conditions or other reasons. If a trading halt occurs, a shareholder may temporarily be unable to purchase or sell shares of the Fund. Similarly, the Exchange or other markets may issue trading halts on specific securities or derivatives, which will affect the ability of the Fund to buy or sell certain securities or derivatives. In such circumstances, the Fund may be unable to rebalance its portfolio or accurately price its investments and may incur substantial trading losses.

Shares also may trade on the Exchange or on other markets at prices below their NAV. The NAV of shares will fluctuate with changes in the market value of the Fund’s holdings and the exchange-traded prices of the Fund's shares may not reflect these market values. Although the Fund’s shares are currently listed on the Exchange, there can be no assurance that an active trading market for shares will develop or be maintained.

Industry Concentration Risk—The Fund may concentrate its investments in a limited number of issuers conducting business in the same industry or group of related industries. Market conditions, interest rates, and economic, regulatory, or financial developments could significantly affect a single industry or a group of related industries, and the securities of companies in that industry or group of industries could react similarly to these or other developments.
 
Liquidity and Valuation Risk—In certain circumstances, it may be difficult for the Fund to purchase and sell a particular investment within a reasonable time at a fair price, or the price at which it has been valued by the Advisor for purposes of the Fund’s NAV, causing the Fund to be less liquid. In addition, the ability of the Fund to assign an accurate daily value to certain investments may be difficult, and the Advisor may be required to fair value the investments.

Market Risk—The Fund's investments in equity securities and derivatives, in general, are subject to market risks that may cause their prices, and therefore the Fund's NAV, to fluctuate over time. Markets are subject to political, regulatory, economic and financial market risks.
 
Non-Diversification Risk—The Fund is considered non-diversified and can invest a greater portion of its assets in securities of individual issuers than a diversified fund. As a result, changes in the market value of a single issuer could cause greater fluctuations in the value of Fund shares than would occur in a diversified fund.

Passive Investment Risk—The Fund is not actively managed and the Advisor does not attempt to take defensive positions in declining markets. Therefore, the Fund may be subject to greater losses in a declining market than a fund that is actively managed.

Real Estate Investment Trust (REIT) Risk—REITs are securities that invest substantially all of their assets in real estate, trade like stocks and may qualify for special tax considerations. Investments in REITs subject the Fund to risks associated with the direct ownership of real estate. Market conditions or events affecting the overall real estate and REIT markets, such as declining property values or rising interest rates, could have a negative impact on the real estate market and the value of REITs in general. REITs may be affected by changes in the value of the underlying property owned by the trusts, economic downturns in the real estate sector which may have a material effect on the real estate in which the REITs invest and their underlying portfolio securities. Further, REITs are dependent upon specialized management skills and may have their investments in relatively few properties, or in a small geographic area or a single property type. Failure of a company to qualify as a REIT under federal tax law may have adverse consequences to the Fund. In addition, REITs have their own expenses, and the Fund will bear a proportionate share of those expenses.

Sector Risk—The Sector Risk applicable to the Fund is as follows:

Financials Sector Risk. The Fund's investments are exposed to issuers conducting business in the financials sector. The Fund is subject to the risk that the securities of such issuers will underperform the market as a whole due to legislative or regulatory changes, adverse market conditions and/or increased competition affecting the financials sector. Financial companies are subject to extensive government regulation, which may limit the financial commitments they can make and the interest rates and fees they can charge. Profitability of these companies depends largely on the availability and cost of capital funds.

Real Estate Sector Risk. The Fund's investments are exposed to issuers conducting business in the real estate sector, including REITs. The Fund is subject to the risk that the securities of such issuers will underperform the market as a whole due to legislative or regulatory changes, adverse market conditions and/or increased competition affecting the real estate sector. The performance of real estate companies has historically been cyclical and particularly sensitive to the overall economy and market changes, including declines in the value of real estate or, conversely, saturation of the real estate market, economic downturns and defaults by borrowers or tenants during such periods, increases in competition, possible lack of mortgage funds or other limits to accessing the credit or capital markets, and changes in interest rates.
Risk Lose Money [Text] rr_RiskLoseMoney As with all exchange-traded funds, a shareholder is subject to the risk that his or her investment could lose money.
Risk Nondiversified Status [Text] rr_RiskNondiversifiedStatus Non-Diversification Risk—The Fund is considered non-diversified and can invest a greater portion of its assets in securities of individual issuers than a diversified fund. As a result, changes in the market value of a single issuer could cause greater fluctuations in the value of Fund shares than would occur in a diversified fund.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading PERFORMANCE INFORMATION
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock
A comparison of the Fund’s performance with that of a broad measure of market performance may give some indication of the risks of an investment in the Fund; however, the Fund commenced operations on August 13, 2015, and therefore, does not have a performance history for a full calendar year. Of course, once the Fund has performance, that past performance (before and after taxes) will not necessarily indicate how the Fund will perform in the future.

Updated performance information is available on the Fund’s website at guggenheiminvestments.com or by calling Guggenheim Client Services at 800.820.0888.
Performance One Year or Less [Text] rr_PerformanceOneYearOrLess A comparison of the Fund’s performance with that of a broad measure of market performance may give some indication of the risks of an investment in the Fund; however, the Fund commenced operations on August 13, 2015, and therefore, does not have a performance history for a full calendar year.
Performance Availability Phone [Text] rr_PerformanceAvailabilityPhone 800.820.0888
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress guggenheiminvestments.com
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Of course, once the Fund has performance, that past performance (before and after taxes) will not necessarily indicate how the Fund will perform in the future.
Guggenheim Broad Market and Sector Equal Weight ETFs | Guggenheim S&P 500® Equal Weight Real Estate ETF | Guggenheim S&P 500® Equal Weight Real Estate ETF  
Prospectus: rr_ProspectusTable  
Shareholder Fee, Other rr_ShareholderFeeOther none
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.40%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets none [16]
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 0.40%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 41
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 129
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 225
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 506
Guggenheim Broad Market and Sector Equal Weight ETFs | Guggenheim S&P 500® Equal Weight Technology ETF  
Prospectus: rr_ProspectusTable  
Risk/Return [Heading] rr_RiskReturnHeading GUGGENHEIM S&P 500® EQUAL WEIGHT TECHNOLOGY ETF (RYT)
Objective [Heading] rr_ObjectiveHeading INVESTMENT OBJECTIVE
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock
The investment objective of the Guggenheim S&P 500® Equal Weight Technology ETF (the “Fund”) is to replicate as closely as possible, before fees and expenses, the performance of the S&P 500® Equal Weight Index Information Technology Total Return (the “Underlying Index”).
Expense [Heading] rr_ExpenseHeading FEES AND EXPENSES OF THE FUND
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock
The table below describes the fees and expenses that you may pay if you buy and hold shares of the Fund. Most investors also will incur customary brokerage commissions when buying or selling shares of the Fund, which are not reflected in the table or the Example. If commissions were included in the table and the Example, the costs shown would be higher.
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption Shareholder Fees (fees paid directly from your investment)
Operating Expenses Caption [Text] rr_OperatingExpensesCaption Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading PORTFOLIO TURNOVER
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock
The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in Total Annual Fund Operating Expenses or in the Example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 21% of the average value of its portfolio. However, the Fund’s portfolio turnover rate is calculated without regard to cash instruments, most derivatives and securities received or delivered as a result of in-kind creations and redemptions of the Fund’s shares. If such instruments were included, the Fund’s portfolio turnover rate might be significantly higher.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 21.00%
Expense Exchange Traded Fund Commissions [Text] rr_ExpenseExchangeTradedFundCommissions Most investors also will incur customary brokerage commissions when buying or selling shares of the Fund, which are not reflected in the table or the Example.
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 funds.
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 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:
Strategy [Heading] rr_StrategyHeading PRINCIPAL INVESTMENT STRATEGIES
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock
The Fund invests primarily in equity securities to meet its investment objective of replicating the Underlying Index as closely as possible, before fees and expenses. The Underlying Index is an unmanaged equal weighted version of the S&P 500® Information Technology Index that consists of the common stocks of the following industries: internet equipment, computers and peripherals, electronic equipment, office electronics and instruments, semiconductor equipment and products, diversified telecommunication services, and wireless telecommunication services that comprise the Information Technology sector of the S&P 500® Index. As of December 31, 2015, the Underlying Index included companies with a capitalization range of $3.5 billion to $587.2 billion. In general, the equal weighting provided by the Underlying Index provides equal representation for all securities at the Underlying Index’s rebalance interval(s), thereby providing broader exposure to the majority of securities in the Underlying Index than typically may be found in the Underlying Index’s market capitalization weighted counterpart.

The Fund uses a passive management strategy, known as “replication,” to track the performance of the Underlying Index. “Replication” refers to investing in substantially all of the securities in the Underlying Index in approximately the same proportions as in the Underlying Index. Under normal circumstances, the Fund will invest at least 90% of its net assets, plus any borrowings for investment purposes, in the equity securities included in the Underlying Index. The Advisor expects that, over time, the correlation between the Fund’s performance and that of the Underlying Index, before fees and expenses, will be 95% or better. A figure of 100% would indicate perfect correlation. The Advisor monitors the Fund’s tracking of the Underlying Index and seeks to maintain an appropriate correlation. The Advisor rebalances the Fund’s portfolio at the same rebalance interval(s) utilized by the Underlying Index.

As long as the Fund invests at least 90% of its total assets in securities included in the Underlying Index, the Fund may hold up to 10% of its assets in investments not included in the Underlying Index, futures contracts, options on futures contracts, options, and swaps related to the Underlying Index, as well as cash and cash equivalents, and shares of investment funds, including money market funds. On a day-to-day basis, the Fund may also hold repurchase agreements, U.S. Government securities or cash equivalents to collateralize its derivatives positions. In an effort to make sure the Fund is fully invested on a day-to-day basis, the Fund may conduct any necessary trading activity at or just prior to the close of the U.S. financial markets.

To the extent the Underlying Index is concentrated in a particular industry the Fund will necessarily be concentrated in that industry. As of the date of this Prospectus, the Fund anticipates that it may have significant exposure to the information technology sector. The Fund is non-diversified and, therefore, may invest a greater percentage of its net assets in a particular issuer in comparison to a diversified fund.
Risk [Heading] rr_RiskHeading PRINCIPAL RISKS
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock
As with all exchange-traded funds, a shareholder is subject to the risk that his or her investment could lose money. In addition to this risk, the Fund is subject to a number of additional risks that may affect the value of its shares, including:

Authorized Participant Concentration Risk—Only an Authorized Participant may engage in creation or redemption transactions directly with the Fund. The Fund has a limited number of institutions that serve as Authorized Participants. To the extent that these institutions exit the business or are unable to proceed with creation and/or redemption orders with respect to the Fund and no other Authorized Participant is able to step forward to create or redeem, Fund shares may trade at a discount to NAV and possibly face delisting.

Correlation and Tracking Error Risk—A number of factors may affect the Fund’s ability to achieve a high degree of correlation with its Underlying Index, and there can be no guarantee that the Fund will achieve a high degree of correlation with its Underlying Index either on a single trading day or for a longer time period. Factors such as Fund expenses, imperfect correlation between the Fund’s investments and the components of the Underlying Index, rounding of share prices, changes to the composition of the Underlying Index, regulatory policies, a high portfolio turnover rate, and the use of leverage all contribute to tracking error and correlation risk. Failure to achieve a high degree of correlation may prevent the Fund from achieving its investment objective and cause the Fund's performance to be less than you expect.
 
Equity Risk—The Fund is subject to the risk that the value of the equity securities and equity-based derivatives, if any, in the Fund’s portfolio will decline due to volatility in the equity market caused by general market and economic conditions, perceptions regarding particular industries represented in the equity market, or factors relating to specific companies to which the Fund has investment exposure.

ETF Trading Risks—An unanticipated closing of the Exchange or one or more markets on which either the Fund’s shares trade or the Fund’s portfolio holdings trade or the inability of such markets to open for trading during normal business hours, such as in response to a natural disaster or other event causing severe market disruption, could result in a shareholder’s inability to buy or sell shares of the Fund and the Fund’s inability to buy and sell exchange-traded portfolio securities during that period, or in a disruption of the Fund’s creation and redemption process, and may make it difficult for the Fund to accurately price its investments thereby potentially affecting the price at which Fund shares trade in the secondary market. All of these events could adversely affect the performance of the Fund. Trading in Fund shares also may be halted by the Exchange or other markets because of market conditions or other reasons. If a trading halt occurs, a shareholder may temporarily be unable to purchase or sell shares of the Fund. Similarly, the Exchange or other markets may issue trading halts on specific securities or derivatives, which will affect the ability of the Fund to buy or sell certain securities or derivatives. In such circumstances, the Fund may be unable to rebalance its portfolio or accurately price its investments and may incur substantial trading losses.

Shares also may trade on the Exchange or on other markets at prices below their NAV. The NAV of shares will fluctuate with changes in the market value of the Fund’s holdings and the exchange-traded prices of the Fund's shares may not reflect these market values. Although the Fund’s shares are currently listed on the Exchange, there can be no assurance that an active trading market for shares will develop or be maintained.

Liquidity and Valuation Risk—In certain circumstances, it may be difficult for the Fund to purchase and sell a particular investment within a reasonable time at a fair price, or the price at which it has been valued by the Advisor for purposes of the Fund’s NAV, causing the Fund to be less liquid. In addition, the ability of the Fund to assign an accurate daily value to certain investments may be difficult, and the Advisor may be required to fair value the investments.

Market Risk—The Fund's investments in equity securities and derivatives, in general, are subject to market risks that may cause their prices, and therefore the Fund's NAV, to fluctuate over time. Markets are subject to political, regulatory, economic and financial market risks.

Non-Diversification Risk—The Fund is considered non-diversified and can invest a greater portion of its assets in securities of individual issuers than a diversified fund. As a result, changes in the market value of a single issuer could cause greater fluctuations in the value of Fund shares than would occur in a diversified fund.

Passive Investment Risk—The Fund is not actively managed and the Advisor does not attempt to take defensive positions in declining markets. Therefore, the Fund may be subject to greater losses in a declining market than a fund that is actively managed.

Sector Risk—The Sector Risk applicable to the Fund is as follows:

Information Technology Sector Risk. The Fund's investments are exposed to issuers conducting business in the information technology sector. The Fund is subject to the risk that the securities of such issuers will underperform the market as a whole due to legislative or regulatory changes, adverse market conditions and/or increased competition affecting the information technology sector. The prices of the securities of technology companies are closely tied to market competition, increased sensitivity to short product cycles and aggressive pricing, and problems with bringing products to market.

 
Risk Lose Money [Text] rr_RiskLoseMoney As with all exchange-traded funds, a shareholder is subject to the risk that his or her investment could lose money.
Risk Nondiversified Status [Text] rr_RiskNondiversifiedStatus Non-Diversification Risk—The Fund is considered non-diversified and can invest a greater portion of its assets in securities of individual issuers than a diversified fund. As a result, changes in the market value of a single issuer could cause greater fluctuations in the value of Fund shares than would occur in a diversified fund.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading PERFORMANCE INFORMATION
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock
The following bar chart shows the performance of the shares of the Fund from year to year. The variability of performance over time provides an indication of the risks of investing in the Fund. The following table shows the performance of the shares of the Fund as an average over different periods of time in comparison to the performance of the Underlying Index and the S&P 500® Index Information Technology Total Return, which is the market capitalization weighted version of the Underlying Index. The figures in the bar chart and table assume the reinvestment of dividends and capital gains distributions. Of course, this past performance (before and after taxes) does not necessarily indicate how the Fund will perform in the future.
 
Updated performance information is available on the Fund’s website at guggenheiminvestments.com or by calling Guggenheim Investments Client Services at 800.820.0888.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The following bar chart shows the performance of the shares of the Fund from year to year. The variability of performance over time provides an indication of the risks of investing in the Fund.
Performance Availability Phone [Text] rr_PerformanceAvailabilityPhone 800.820.0888
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress guggenheiminvestments.com
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Of course, this past performance (before and after taxes) does not necessarily indicate how the Fund will perform in the future.
Bar Chart [Heading] rr_BarChartHeading The performance information shown below is based on a calendar year.
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock
Highest Quarter Return
 
Lowest Quarter Return
Q3 2009
22.18%
 
Q4 2008
-29.02%
Performance Table Heading rr_PerformanceTableHeading AVERAGE ANNUAL TOTAL RETURN (for periods ended December 31, 2015)
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate The after-tax returns presented in the table below are calculated using highest historical individual federal marginal income tax rates and do not reflect the impact of state and local taxes.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred Your actual after-tax returns will depend on your specific tax situation and may differ from those shown below. After-tax returns are not relevant to investors who hold shares of the Fund through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts (“IRAs”).
Performance Table Narrative rr_PerformanceTableNarrativeTextBlock
The after-tax returns presented in the table below are calculated using highest historical individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Your actual after-tax returns will depend on your specific tax situation and may differ from those shown below. After-tax returns are not relevant to investors who hold shares of the Fund through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts (“IRAs”).
Guggenheim Broad Market and Sector Equal Weight ETFs | Guggenheim S&P 500® Equal Weight Technology ETF | S&P 500 Equal Weight Index Information Technology Total Return  
Prospectus: rr_ProspectusTable  
Index No Deduction for Fees, Expenses, Taxes [Text] rr_IndexNoDeductionForFeesExpensesTaxes (reflects no deduction for fees, expenses or taxes)
Label rr_AverageAnnualReturnLabel S&P 500® Equal Weight Index Information Technology Total Return (reflects no deduction for fees, expenses or taxes)
1 Year rr_AverageAnnualReturnYear01 3.39%
5 Years rr_AverageAnnualReturnYear05 13.01%
Since Inception rr_AverageAnnualReturnSinceInception 8.68%
Inception Date rr_AverageAnnualReturnInceptionDate Nov. 01, 2006
Guggenheim Broad Market and Sector Equal Weight ETFs | Guggenheim S&P 500® Equal Weight Technology ETF | S&P 500 Index Information Technology Total Return  
Prospectus: rr_ProspectusTable  
Index No Deduction for Fees, Expenses, Taxes [Text] rr_IndexNoDeductionForFeesExpensesTaxes (reflects no deduction for fees, expenses or taxes)
Label rr_AverageAnnualReturnLabel S&P 500® Index Information Technology Total Return (reflects no deduction for fees, expenses or taxes)
1 Year rr_AverageAnnualReturnYear01 5.93%
5 Years rr_AverageAnnualReturnYear05 13.95%
Since Inception rr_AverageAnnualReturnSinceInception 9.66%
Inception Date rr_AverageAnnualReturnInceptionDate Nov. 01, 2006
Guggenheim Broad Market and Sector Equal Weight ETFs | Guggenheim S&P 500® Equal Weight Technology ETF | Guggenheim S&P 500® Equal Weight Technology ETF  
Prospectus: rr_ProspectusTable  
Trading Symbol dei_TradingSymbol RYT
Shareholder Fee, Other rr_ShareholderFeeOther none
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.40%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets none [17]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 0.40%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 41
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 129
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 225
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 506
Annual Return 2007 rr_AnnualReturn2007 1.81%
Annual Return 2008 rr_AnnualReturn2008 (45.73%)
Annual Return 2009 rr_AnnualReturn2009 68.73%
Annual Return 2010 rr_AnnualReturn2010 18.27%
Annual Return 2011 rr_AnnualReturn2011 (6.87%)
Annual Return 2012 rr_AnnualReturn2012 12.25%
Annual Return 2013 rr_AnnualReturn2013 40.16%
Annual Return 2014 rr_AnnualReturn2014 19.22%
Annual Return 2015 rr_AnnualReturn2015 2.97%
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Highest Quarter Return
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Sep. 30, 2009
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 22.18%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Lowest Quarter Return
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2008
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (29.02%)
Label rr_AverageAnnualReturnLabel Return Before Taxes
1 Year rr_AverageAnnualReturnYear01 2.97%
5 Years rr_AverageAnnualReturnYear05 12.46%
Since Inception rr_AverageAnnualReturnSinceInception 8.13%
Inception Date rr_AverageAnnualReturnInceptionDate Nov. 01, 2006
Guggenheim Broad Market and Sector Equal Weight ETFs | Guggenheim S&P 500® Equal Weight Technology ETF | Guggenheim S&P 500® Equal Weight Technology ETF | After Taxes on Distributions  
Prospectus: rr_ProspectusTable  
Label rr_AverageAnnualReturnLabel Return After Taxes on Distributions
1 Year rr_AverageAnnualReturnYear01 2.43%
5 Years rr_AverageAnnualReturnYear05 12.02%
Since Inception rr_AverageAnnualReturnSinceInception 7.86%
Inception Date rr_AverageAnnualReturnInceptionDate Nov. 01, 2006
Guggenheim Broad Market and Sector Equal Weight ETFs | Guggenheim S&P 500® Equal Weight Technology ETF | Guggenheim S&P 500® Equal Weight Technology ETF | After Taxes on Distributions and Sales  
Prospectus: rr_ProspectusTable  
Label rr_AverageAnnualReturnLabel Return After Taxes on Distributions and Sale of Fund Shares
1 Year rr_AverageAnnualReturnYear01 1.67%
5 Years rr_AverageAnnualReturnYear05 9.74%
Since Inception rr_AverageAnnualReturnSinceInception 6.45%
Inception Date rr_AverageAnnualReturnInceptionDate Nov. 01, 2006
Guggenheim Broad Market and Sector Equal Weight ETFs | Guggenheim S&P 500® Equal Weight Utilities ETF  
Prospectus: rr_ProspectusTable  
Risk/Return [Heading] rr_RiskReturnHeading GUGGENHEIM S&P 500® EQUAL WEIGHT UTILITIES ETF (RYU)
Objective [Heading] rr_ObjectiveHeading INVESTMENT OBJECTIVE
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock
The investment objective of the Guggenheim S&P 500® Equal Weight Utilities ETF (the “Fund”) is to replicate as closely as possible, before fees and expenses, the performance of the S&P 500® Equal Weight Index Telecommunication Services & Utilities Total Return (the “Underlying Index”).
Expense [Heading] rr_ExpenseHeading FEES AND EXPENSES OF THE FUND
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock
The table below describes the fees and expenses that you may pay if you buy and hold shares of the Fund. Most investors also will incur customary brokerage commissions when buying or selling shares of the Fund, which are not reflected in the table or the Example. If commissions were included in the table and the Example, the costs shown would be higher.
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption Shareholder Fees (fees paid directly from your investment)
Operating Expenses Caption [Text] rr_OperatingExpensesCaption Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading PORTFOLIO TURNOVER
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock
The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in Total Annual Fund Operating Expenses or in the Example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 20% of the average value of its portfolio. However, the Fund’s portfolio turnover rate is calculated without regard to cash instruments, most derivatives and securities received or delivered as a result of in-kind creations and redemptions of the Fund’s shares. If such instruments were included, the Fund’s portfolio turnover rate might be significantly higher.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 20.00%
Expense Exchange Traded Fund Commissions [Text] rr_ExpenseExchangeTradedFundCommissions Most investors also will incur customary brokerage commissions when buying or selling shares of the Fund, which are not reflected in the table or the Example.
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 funds.
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 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:
Strategy [Heading] rr_StrategyHeading PRINCIPAL INVESTMENT STRATEGIES
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock
The Fund invests primarily in equity securities to meet its investment objective of replicating the Underlying Index as closely as possible, before fees and expenses. The Underlying Index is an unmanaged equal weighted version of the S&P 500® Utilities Index that consists of the common stocks of the following industries: electric utilities, gas utilities, multi-utilities and unregulated power and water utilities, telecommunication service companies, including fixed-line, cellular, wireless, high bandwidth and fiber-optic cable networks that comprise the telecommunication services and utilities sector of the S&P 500® Index. As of December 31, 2015, the Underlying Index included companies with a capitalization range of $3.8 billion to $211.7 billion. In general, the equal weighting provided by the Underlying Index provides equal representation for all securities at the Underlying Index’s rebalance interval(s), thereby providing broader exposure to the majority of securities in the Underlying Index than typically may be found in the Underlying Index’s market capitalization weighted counterpart.

The Fund uses a passive management strategy, known as “replication,” to track the performance of the Underlying Index. “Replication” refers to investing in substantially all of the securities in the Underlying Index in approximately the same proportions as in the Underlying Index. Under normal circumstances, the Fund will invest at least 90% of its net assets, plus any borrowings for investment purposes, in the equity securities included in the Underlying Index. The Advisor expects that, over time, the correlation between the Fund’s performance and that of the Underlying Index, before fees and expenses, will be 95% or better. A figure of 100% would indicate perfect correlation. The Advisor monitors the Fund’s tracking of the Underlying Index and seeks to maintain an appropriate correlation. The Advisor rebalances the Fund’s portfolio at the same rebalance interval(s) utilized by the Underlying Index.

As long as the Fund invests at least 90% of its total assets in securities included in the Underlying Index, the Fund may hold up to 10% of its assets in investments not included in the Underlying Index, futures contracts, options on futures contracts, options, and swaps related to the Underlying Index, as well as cash and cash equivalents, and shares of investment funds, including money market funds. On a day-to-day basis, the Fund may also hold repurchase agreements, U.S. Government securities or cash equivalents to collateralize its derivatives positions. In an effort to make sure the Fund is fully invested on a day-to-day basis, the Fund may conduct any necessary trading activity at or just prior to the close of the U.S. financial markets.

To the extent the Underlying Index is concentrated in a particular industry the Fund will necessarily be concentrated in that industry. As of the date of this Prospectus, the Fund anticipates that it may have significant exposure to the telecommunication services and utilities sectors. Also as of the date of this Prospectus, the Underlying Index components and thus the Fund's assets, are concentrated in the multi-utilities and the electric utilities industries or groups of industries. The Fund is non-diversified and, therefore, may invest a greater percentage of its net assets in a particular issuer in comparison to a diversified fund.
Risk [Heading] rr_RiskHeading PRINCIPAL RISKS
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock
As with all exchange-traded funds, a shareholder is subject to the risk that his or her investment could lose money. In addition to this risk, the Fund is subject to a number of additional risks that may affect the value of its shares, including:

Authorized Participant Concentration Risk—Only an Authorized Participant may engage in creation or redemption transactions directly with the Fund. The Fund has a limited number of institutions that serve as Authorized Participants. To the extent that these institutions exit the business or are unable to proceed with creation and/or redemption orders with respect to the Fund and no other Authorized Participant is able to step forward to create or redeem, Fund shares may trade at a discount to NAV and possibly face delisting.

Correlation and Tracking Error Risk—A number of factors may affect the Fund’s ability to achieve a high degree of correlation with its Underlying Index, and there can be no guarantee that the Fund will achieve a high degree of correlation with its Underlying Index either on a single trading day or for a longer time period. Factors such as Fund expenses, imperfect correlation between the Fund’s investments and the components of the Underlying Index, rounding of share prices, changes to the composition of the Underlying Index, regulatory policies, a high portfolio turnover rate, and the use of leverage all contribute to tracking error and correlation risk. Failure to achieve a high degree of correlation may prevent the Fund from achieving its investment objective and cause the Fund's performance to be less than you expect.

Equity Risk—The Fund is subject to the risk that the value of the equity securities and equity-based derivatives, if any, in the Fund’s portfolio will decline due to volatility in the equity market caused by general market and economic conditions, perceptions regarding particular industries represented in the equity market, or factors relating to specific companies to which the Fund has investment exposure.

ETF Trading Risks—An unanticipated closing of the Exchange or one or more markets on which either the Fund’s shares trade or the Fund’s portfolio holdings trade or the inability of such markets to open for trading during normal business hours, such as in response to a natural disaster or other event causing severe market disruption, could result in a shareholder’s inability to buy or sell shares of the Fund and the Fund’s inability to buy and sell exchange-traded portfolio securities during that period, or in a disruption of the Fund’s creation and redemption process, and may make it difficult for the Fund to accurately price its investments thereby potentially affecting the price at which Fund shares trade in the secondary market. All of these events could adversely affect the performance of the Fund. Trading in Fund shares also may be halted by the Exchange or other markets because of market conditions or other reasons. If a trading halt occurs, a shareholder may temporarily be unable to purchase or sell shares of the Fund. Similarly, the Exchange or other markets may issue trading halts on specific securities or derivatives, which will affect the ability of the Fund to buy or sell certain securities or derivatives. In such circumstances, the Fund may be unable to rebalance its portfolio or accurately price its investments and may incur substantial trading losses.

Shares also may trade on the Exchange or on other markets at prices below their NAV. The NAV of shares will fluctuate with changes in the market value of the Fund’s holdings and the exchange-traded prices of the Fund's shares may not reflect these market values. Although the Fund’s shares are currently listed on the Exchange, there can be no assurance that an active trading market for shares will develop or be maintained.

Industry Concentration Risk—The Fund may concentrate its investments in a limited number of issuers conducting business in the same industry or group of related industries. Market conditions, interest rates, and economic, regulatory, or financial developments could significantly affect a single industry or a group of related industries, and the securities of companies in that industry or group of industries could react similarly to these or other developments.

Liquidity and Valuation Risk—In certain circumstances, it may be difficult for the Fund to purchase and sell a particular investment within a reasonable time at a fair price, or the price at which it has been valued by the Advisor for purposes of the Fund’s NAV, causing the Fund to be less liquid. In addition, the ability of the Fund to assign an accurate daily value to certain investments may be difficult, and the Advisor may be required to fair value the investments.

Market Risk—The Fund's investments in equity securities and derivatives, in general, are subject to market risks that may cause their prices, and therefore the Fund's NAV, to fluctuate over time. Markets are subject to political, regulatory, economic and financial market risks.

Non-Diversification Risk—The Fund is considered non-diversified and can invest a greater portion of its assets in securities of individual issuers than a diversified fund. As a result, changes in the market value of a single issuer could cause greater fluctuations in the value of Fund shares than would occur in a diversified fund.

Passive Investment Risk—The Fund is not actively managed and the Advisor does not attempt to take defensive positions in declining markets. Therefore, the Fund may be subject to greater losses in a declining market than a fund that is actively managed.

Sector Risk—The Sector Risk applicable to the Fund is as follows:

Telecommunication Services and Utilities Sector Risk. The Fund's investments are exposed to issuers conducting business in the telecommunication services and utilities sectors. The Fund is subject to the risk that the securities of such issuers will underperform the market as a whole due to legislative or regulatory changes, adverse market conditions and/or increased competition affecting the telecommunications services and/or utilities sector. The prices of the securities of telecommunications services and utilities companies are closely tied to government regulation and market competition.
Risk Lose Money [Text] rr_RiskLoseMoney As with all exchange-traded funds, a shareholder is subject to the risk that his or her investment could lose money.
Risk Nondiversified Status [Text] rr_RiskNondiversifiedStatus Non-Diversification Risk—The Fund is considered non-diversified and can invest a greater portion of its assets in securities of individual issuers than a diversified fund. As a result, changes in the market value of a single issuer could cause greater fluctuations in the value of Fund shares than would occur in a diversified fund.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading PERFORMANCE INFORMATION
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock
The following bar chart shows the performance of the shares of the Fund from year to year. The variability of performance over time provides an indication of the risks of investing in the Fund. The following table shows the performance of the shares of the Fund as an average over different periods of time in comparison to the performance of the Underlying Index and the S&P 500® Index Utilities Total Return, which is the market capitalization weighted version of the Underlying Index. The figures in the bar chart and table assume the reinvestment of dividends and capital gains distributions. Of course, this past performance (before and after taxes) does not necessarily indicate how the Fund will perform in the future.

Updated performance information is available on the Fund’s website at guggenheiminvestments.com or by calling Guggenheim Investments Client Services at 800.820.0888.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The following bar chart shows the performance of the shares of the Fund from year to year. The variability of performance over time provides an indication of the risks of investing in the Fund.
Performance Availability Phone [Text] rr_PerformanceAvailabilityPhone 800.820.0888
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress guggenheiminvestments.com
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Of course, this past performance (before and after taxes) does not necessarily indicate how the Fund will perform in the future.
Bar Chart [Heading] rr_BarChartHeading The performance information shown below is based on a calendar year.
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock
Highest Quarter Return
 
Lowest Quarter Return
Q3 2010
14.23%
 
Q3 2008
-14.93%
Performance Table Heading rr_PerformanceTableHeading AVERAGE ANNUAL TOTAL RETURN (for periods ended December 31, 2015)
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate The after-tax returns presented in the table below are calculated using highest historical individual federal marginal income tax rates and do not reflect the impact of state and local taxes.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred Your actual after-tax returns will depend on your specific tax situation and may differ from those shown below. After-tax returns are not relevant to investors who hold shares of the Fund through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts (“IRAs”).
Performance Table Narrative rr_PerformanceTableNarrativeTextBlock
The after-tax returns presented in the table below are calculated using highest historical individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Your actual after-tax returns will depend on your specific tax situation and may differ from those shown below. After-tax returns are not relevant to investors who hold shares of the Fund through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts (“IRAs”).
Guggenheim Broad Market and Sector Equal Weight ETFs | Guggenheim S&P 500® Equal Weight Utilities ETF | S&P 500 Equal Weight Index Telecommunication Services & Utilities Total Return  
Prospectus: rr_ProspectusTable  
Index No Deduction for Fees, Expenses, Taxes [Text] rr_IndexNoDeductionForFeesExpensesTaxes (reflects no deduction for fees, expenses or taxes)
Label rr_AverageAnnualReturnLabel S&P 500® Equal Weight Index Telecommunication Services & Utilities Total Return (reflects no deduction for fees, expenses or taxes)
1 Year rr_AverageAnnualReturnYear01 (3.67%)
5 Years rr_AverageAnnualReturnYear05 11.73%
Since Inception rr_AverageAnnualReturnSinceInception 7.42%
Inception Date rr_AverageAnnualReturnInceptionDate Nov. 01, 2006
Guggenheim Broad Market and Sector Equal Weight ETFs | Guggenheim S&P 500® Equal Weight Utilities ETF | S&P 500 Index Utilities Total Return  
Prospectus: rr_ProspectusTable  
Index No Deduction for Fees, Expenses, Taxes [Text] rr_IndexNoDeductionForFeesExpensesTaxes (reflects no deduction for fees, expenses or taxes)
Label rr_AverageAnnualReturnLabel S&P 500® Index Utilities Total Return (reflects no deduction for fees, expenses or taxes)
1 Year rr_AverageAnnualReturnYear01 (4.84%)
5 Years rr_AverageAnnualReturnYear05 11.03%
Since Inception rr_AverageAnnualReturnSinceInception 6.20%
Inception Date rr_AverageAnnualReturnInceptionDate Nov. 01, 2006
Guggenheim Broad Market and Sector Equal Weight ETFs | Guggenheim S&P 500® Equal Weight Utilities ETF | Guggenheim S&P 500® Equal Weight Utilities ETF  
Prospectus: rr_ProspectusTable  
Trading Symbol dei_TradingSymbol RYU
Shareholder Fee, Other rr_ShareholderFeeOther none
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.40%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets none [18]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 0.40%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 41
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 129
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 225
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 506
Annual Return 2007 rr_AnnualReturn2007 10.32%
Annual Return 2008 rr_AnnualReturn2008 (30.83%)
Annual Return 2009 rr_AnnualReturn2009 20.17%
Annual Return 2010 rr_AnnualReturn2010 13.05%
Annual Return 2011 rr_AnnualReturn2011 12.65%
Annual Return 2012 rr_AnnualReturn2012 8.30%
Annual Return 2013 rr_AnnualReturn2013 13.28%
Annual Return 2014 rr_AnnualReturn2014 28.02%
Annual Return 2015 rr_AnnualReturn2015 (4.00%)
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Highest Quarter Return
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Sep. 30, 2010
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 14.23%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Lowest Quarter Return
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Sep. 30, 2008
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (14.93%)
Label rr_AverageAnnualReturnLabel Return Before Taxes
1 Year rr_AverageAnnualReturnYear01 (4.00%)
5 Years rr_AverageAnnualReturnYear05 11.17%
Since Inception rr_AverageAnnualReturnSinceInception 6.87%
Inception Date rr_AverageAnnualReturnInceptionDate Nov. 01, 2006
Guggenheim Broad Market and Sector Equal Weight ETFs | Guggenheim S&P 500® Equal Weight Utilities ETF | Guggenheim S&P 500® Equal Weight Utilities ETF | After Taxes on Distributions  
Prospectus: rr_ProspectusTable  
Label rr_AverageAnnualReturnLabel Return After Taxes on Distributions
1 Year rr_AverageAnnualReturnYear01 (5.71%)
5 Years rr_AverageAnnualReturnYear05 9.59%
Since Inception rr_AverageAnnualReturnSinceInception 5.42%
Inception Date rr_AverageAnnualReturnInceptionDate Nov. 01, 2006
Guggenheim Broad Market and Sector Equal Weight ETFs | Guggenheim S&P 500® Equal Weight Utilities ETF | Guggenheim S&P 500® Equal Weight Utilities ETF | After Taxes on Distributions and Sales  
Prospectus: rr_ProspectusTable  
Label rr_AverageAnnualReturnLabel Return After Taxes on Distributions and Sale of Fund Shares
1 Year rr_AverageAnnualReturnYear01 (2.29%)
5 Years rr_AverageAnnualReturnYear05 8.10%
Since Inception rr_AverageAnnualReturnSinceInception 4.75%
Inception Date rr_AverageAnnualReturnInceptionDate Nov. 01, 2006
[1] Other Expenses were less than 0.01% for the fiscal year ended October 31, 2015.
[2] The Russell MidCap® Equal Weight Index is an unmanaged equal weighted version of the Russell MidCap® Index, which measures the performance of the mid-cap segment of the U.S. equity universe. The Russell MidCap® Index is a subset of the Russell 1000® Index and includes approximately 800 of the smallest securities within the Russell 1000® Index based on a combination of market capitalization and current index membership.
[3] The Russell 2000® Equal Weight Index is an unmanaged equal weighted version of the Russell 2000® Index. The Russell 2000® Index is composed of the 2,000 smallest companies in the Russell 3000® Index, representing approximately 10% of the Russell 3000® total market capitalization. The Russell 3000® Index is composed of the 3,000 largest U.S. companies ranked by total market capitalization, representing approximately 98% of the U.S. investable equity market.
[4] The MSCI Emerging Markets Equal Country Weighted Index commenced operations on November 10, 2014 and, therefore, does not have performance for the Fund's "Past 5 Years" and "Since Inception" periods. The net version of the MSCI Emerging Markets Index reflects reinvested dividends net of withholding taxes, but reflects no deductions for expenses or other taxes.
[5] The net version of the MSCI Emerging Markets Index reflects reinvested dividends net of withholding taxes, but reflects no deductions for expenses or other taxes.
[6] Other Expenses were less than 0.01% for the fiscal year ended October 31, 2015.
[7] The Total Annual Fund Operating Expenses (before and after any fee waivers and/or expense reimbursements) in this fee table may not correlate to the expense ratios in the Fund’s financial highlights and financial statements because the financial highlights and financial statements reflect only the operating expenses of the Fund and do not include Acquired Fund Fees and Expenses, which are fees and expenses incurred indirectly by the Fund through its investments in certain underlying investment companies.
[8] The Advisor has contractually agreed to reduce fees and/or reimburse expenses to the extent necessary to keep the Fund’s Total Annual Fund Operating Expenses (including Acquired Fund Fees and Expenses but excluding interest, taxes, brokerage commissions, dividends on securities sold short, litigation, indemnification, other expenditures which are capitalized in accordance with generally accepted accounting principles, and other extraordinary expenses not incurred in the ordinary course of the Fund's business (“Excluded Expenses”)) from exceeding 0.70% of the Fund’s average daily net assets. The Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement includes Excluded Expenses and, thus, from time to time may be higher than 0.70%. This contractual arrangement may be terminated only with the approval of the Fund’s Board of Trustees. In any event, this undertaking will continue for at least twelve months from the date of this Prospectus.
[9] Other Expenses were less than 0.01% for the fiscal year ended October 31, 2015.
[10] Other Expenses were less than 0.01% for the fiscal year ended October 31, 2015.
[11] Other Expenses were less than 0.01% for the fiscal year ended October 31, 2015.
[12] Other Expenses were less than 0.01% for the fiscal year ended October 31, 2015.
[13] Other Expenses were less than 0.01% for the fiscal year ended October 31, 2015.
[14] Other Expenses were less than 0.01% for the fiscal year ended October 31, 2015.
[15] Other Expenses were less than 0.01% for the fiscal year ended October 31, 2015.
[16] Other Expenses were less than 0.01% for the fiscal year ended October 31, 2015.
[17] Other Expenses were less than 0.01% for the fiscal year ended October 31, 2015.
[18] Other Expenses were less than 0.01% for the fiscal year ended October 31, 2015.