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Label Element Value
Risk/Return: rr_RiskReturnAbstract  
Document Type dei_DocumentType 485BPOS
Document Period End Date dei_DocumentPeriodEndDate Aug. 31, 2011
Registrant Name dei_EntityRegistrantName Vanguard World Fund
Central Index Key dei_EntityCentralIndexKey 0000052848
Amendment Flag dei_AmendmentFlag false
Document Creation Date dei_DocumentCreationDate May 14, 2012
Document Effective Date dei_DocumentEffectiveDate Apr. 30, 2012
Vanguard Extended Duration Treasury Index Fund | ETF
  
Risk/Return: rr_RiskReturnAbstract  
Prospectus Date rr_ProspectusDate Apr. 30, 2012
Risk/Return rr_RiskReturnHeading Risk/Return
Investment objective: rr_ObjectiveHeading Investment Objective
Investment objective rr_ObjectivePrimaryTextBlock

The Fund seeks to track the performance of an index of extended-duration zero-coupon U.S. Treasury securities.
Expenses Heading rr_ExpenseHeading Fees and Expenses
Fees and Expenses of the Fund rr_ExpenseNarrativeTextBlock

The following table describes the fees and expenses you may pay if you buy and hold ETF Shares of the Fund.
Shareholder Fees Caption rr_ShareholderFeesCaption Shareholder Fees (Fees paid directly from your investment)
Operating Expenses Caption 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 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 more taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the previous expense example, reduce the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 22%.

PortfolioTurnover, Rate rr_PortfolioTurnoverRate 22.00%
EXAMPLE rr_ExpenseExampleHeading

Example
Expense Example, Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock

The following example is intended to help you compare the cost of investing in Extended Duration Treasury ETF with the cost of investing in other funds. It illustrates the hypothetical expenses that you would incur over various periods if you invest $10,000 in Extended Duration Treasury ETF. This example assumes that Extended Duration Treasury ETF provides a return of 5% a year and that total annual fund operating expenses remain as stated in the preceding table. The results apply whether or not you redeem your investment at the end of the given period. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example Closing rr_ExpenseExampleClosingTextBlock

This example does not include the brokerage commissions that you may pay to buy and sell ETF Shares of the Fund.

Strategy: rr_StrategyHeading Primary Investment Strategies
StrategyNarrative rr_StrategyNarrativeTextBlock

The Fund employs an indexing investment approach designed to track the performance of the Barclays Capital U.S. Treasury STRIPS 20-30 Year Equal Par Bond Index. This Index includes zero-coupon U.S. Treasury securities (Treasury STRIPS) with maturities ranging from 20 to 30 years. A Treasury STRIP represents a single coupon payment, or a single principal payment, from a U.S. Treasury security that has been 'stripped' into separately tradable components.

The Fund invests by sampling the Index, meaning that it holds a range of securities that, in the aggregate, approximates the full Index in terms of key risk factors, including duration and other characteristics. All of the Fund's investments will be selected through the sampling process, and at least 80% of the Fund's assets will be invested in U.S. Treasury securities held in the Index. The Fund maintains a dollar-weighted average maturity consistent with that of the Index, which generally ranges between 20 and 30 years. The Fund is expected to have a duration that is greater than 20 years.
Risk: rr_RiskHeading Primary Risks
Risk Narrative rr_RiskNarrativeTextBlock

An investment in the Fund could lose money over short or even long periods. You should expect the Fund's share price and total return to fluctuate within a wide range, like the fluctuations of the overall bond market. The Fund's performance could be hurt by:

Interest rate risk, which is the chance that bond prices overall will decline because of rising interest rates. Interest rate risk is expected to be extremely high for the Fund because it invests primarily in zero-coupon long-term bonds, which have prices that are even more sensitive to interest rate changes than are coupon-bearing bonds of similar maturity. Because the Fund invests primarily in Treasury STRIPS with maturities ranging from 20 to 30 years, rising interest rates may cause the value of the Fund's investments to decline significantly.

Index sampling risk, which is the chance that the securities selected for the Fund, in the aggregate, will not provide investment performance matching that of the Fund's target index. Index sampling risk for the Fund should be low.

Because ETF Shares are traded on an exchange, they are subject to additional risks:

Extended Duration Treasury ETF Shares are listed for trading on NYSE Arca and are bought and sold on the secondary market at market prices. Although it is expected that the market price of an Extended Duration Treasury ETF Share typically will approximate its net asset value (NAV), there may be times when the market price and the NAV differ significantly. Thus, you may pay more or less than NAV when you buy Extended Duration Treasury ETF Shares on the secondary market, and you may receive more or less than NAV when you sell those shares.

Although Extended Duration Treasury ETF Shares are listed for trading on NYSE Arca, it is possible that an active trading market may not be maintained.

Trading of Extended Duration Treasury ETF Shares on NYSE Arca may be halted by the activation of individual or marketwide 'circuit breakers' (which halt trading for a specific period of time when the price of a particular security or overall market prices decline by a specified percentage). Trading of Extended Duration Treasury ETF Shares may also be halted if (1) the shares are delisted from NYSE Arca without first being listed on another exchange or (2) NYSE Arca officials determine that such action is appropriate in the interest of a fair and orderly market or to protect investors.

An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
May Lose Money rr_RiskLoseMoney

An investment in the Fund could lose money over short or even long periods.

Not Insured Depository Institution rr_RiskNotInsuredDepositoryInstitution

An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Bar Chart and Performance Table rr_BarChartAndPerformanceTableHeading Annual Total Returns
Performance Information Illustrates Variability of Returns rr_PerformanceInformationIllustratesVariabilityOfReturns

The following bar chart and table are intended to help you understand the risks of investing in the Fund.
Performance Availability Phone rr_PerformanceAvailabilityPhone

800-662-7447
Performance Availability Website Address rr_PerformanceAvailabilityWebSiteAddress

vanguard.com/performance

Past Performance Does Not Indiciate Future Returns rr_PerformancePastDoesNotIndicateFuture

Keep in mind that the Fund's past performance (before and after taxes) does not indicate how the Fund will perform in the future.

Bar Chart rr_BarChartHeading Annual Total Returns - Vanguard Extended Duration Treasury Index Fund ETF Shares
Bar Chart Narrative rr_BarChartNarrativeTextBlock

The following bar chart and table are intended to help you understand the risks of investing in the Fund. The bar chart shows how the performance of the Fund's ETF Shares(based on NAV) has varied from one calendar year to another over the periods shown. The table shows how the average annual total returns of the ETF Shares compare with those of the Fund's target index, which has investment characteristics similar to those of the Fund. Keep in mind that the Fund's past performance (before and after taxes) does not indicate how the Fund will perform in the future. Updated performance information is available on our website at vanguard.com/performance or by calling Vanguard toll-free at 800-662-7447.
Bar Chart Footnotes rr_BarChartFootnotesTextBlock

1 The year-to-date return as of the most recent calendar quarter, which ended on March 31, 2012 was -10.99%
Bar Chart Closing rr_BarChartClosingTextBlock

During the periods shown in the bar chart, the highest return for a calendar quarter was 52.06% (quarter ended September 30, 2011 ), and the lowest return for a quarter was -20.01% (quarter ended March 31, 2009 ).
Year to Date Return Label rr_YearToDateReturnLabel The year-to-date return as of the most recent calendar quarter, which ended on March 31, 2012
Highest Quarterly Return Label rr_HighestQuarterlyReturnLabel (quarter ended September 30, 2011 )
Lowest Quarterly Return Label rr_LowestQuarterlyReturnLabel (quarter ended March 31, 2009 )
Bar Chart and Performance Table: rr_PerformanceTableHeading Average Annual Total Returns for Periods Ended December 31, 2011
Index No Deduction for Fees, Expenses, Taxes rr_IndexNoDeductionForFeesExpensesTaxes (reflects no deduction for fees, expenses, or taxes)
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate

When after-tax returns are calculated, it is assumed that the shareholder was in the highest individual federal marginal income tax bracket at the time of each distribution of income or capital gains or upon redemption.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred

Please note that after-tax returns are not relevant for a shareholder who holds fund shares in a tax-deferred account, such as an individual retirement account or a 401(k) plan.
Performance Table Explains why after Tax Higher rr_PerformanceTableExplanationAfterTaxHigher

Also, figures captioned Return After Taxes on Distributions and Sale of Fund Shares will be higher than other figures for the same period if a capital loss occurs upon redemption and results in an assumed tax deduction for the shareholder.
Performance Table Closing rr_PerformanceTableClosingTextBlock

Actual after-tax returns depend on your tax situation and may differ from those shown in the preceding table. When after-tax returns are calculated, it is assumed that the shareholder was in the highest individual federal marginal income tax bracket at the time of each distribution of income or capital gains or upon redemption. State and local income taxes are not reflected in the calculations. Please note that after-tax returns are not relevant for a shareholder who holds fund shares in a tax-deferred account, such as an individual retirement account or a 401(k) plan. Also, figures captioned Return After Taxes on Distributions and Sale of Fund Shares will be higher than other figures for the same period if a capital loss occurs upon redemption and results in an assumed tax deduction for the shareholder.
Vanguard Extended Duration Treasury Index Fund | Institutional
  
Risk/Return: rr_RiskReturnAbstract  
Prospectus Date rr_ProspectusDate Apr. 30, 2012
Risk/Return rr_RiskReturnHeading Risk/Return
Investment objective: rr_ObjectiveHeading Investment Objective
Investment objective rr_ObjectivePrimaryTextBlock

The Fund seeks to track the performance of an index of extended-duration zero-coupon U.S. Treasury securities.
Expenses Heading rr_ExpenseHeading Fees and Expenses
Fees and Expenses of the Fund rr_ExpenseNarrativeTextBlock

The following table describes the fees and expenses you may pay if you buy and hold Institutional Shares or Institutional Plus Shares of the Fund.
Shareholder Fees Caption rr_ShareholderFeesCaption Shareholder Fees (Fees paid directly from your investment)
Operating Expenses Caption 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 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 more taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the previous expense examples, reduce the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 22%.

PortfolioTurnover, Rate rr_PortfolioTurnoverRate 22.00%
EXAMPLE rr_ExpenseExampleHeading

Examples
Expense Example, Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock

The following examples are intended to help you compare the cost of investing in the Fund's Institutional Shares or Institutional Plus Shares with the cost of investing in other mutual funds. They illustrate the hypothetical expenses that you would incur over various periods if you invest $10,000 in the Fund's shares. These examples assume that the Shares provide a return of 5% a year and that total annual fund operating expenses remain as stated in the preceding table. The results apply whether or not you redeem your investment at the end of the given period. Although your actual costs may be higher or lower, based on these assumptions your costs would be:
Strategy: rr_StrategyHeading Primary Investment Strategies
StrategyNarrative rr_StrategyNarrativeTextBlock

The Fund employs an indexing investment approach designed to track the performance of the Barclays Capital U.S. Treasury STRIPS 20-30 Year Equal Par Bond Index. This Index includes zero-coupon U.S. Treasury securities (Treasury STRIPS) with maturities ranging from 20 to 30 years. A Treasury STRIP represents a single coupon payment, or a single principal payment, from a U.S. Treasury security that has been 'stripped' into separately tradable components.

The Fund invests by sampling the Index, meaning that it holds a range of securities that, in the aggregate, approximates the full Index in terms of key risk factors, including duration and other characteristics. All of the Fund's investments will be selected through the sampling process, and at least 80% of the Fund's assets will be invested in U.S. Treasury securities held in the Index. The Fund maintains a dollar-weighted average maturity consistent with that of the Index, which generally ranges between 20 and 30 years. The Fund is expected to have a duration that is greater than 20 years.
Risk: rr_RiskHeading Primary Risks
Risk Narrative rr_RiskNarrativeTextBlock

An investment in the Fund could lose money over short or even long periods. You should expect the Fund's share price and total return to fluctuate within a wide range, like the fluctuations of the overall bond market. The Fund's performance could be hurt by:

Interest rate risk, which is the chance that bond prices overall will decline because of rising interest rates. Interest rate risk is expected to be extremely high for the Fund because it invests primarily in zero-coupon long-term bonds, which have prices that are even more sensitive to interest rate changes than are coupon-bearing bonds of similar maturity. Because the Fund invests primarily in Treasury STRIPS with maturities ranging from 20 to 30 years, rising interest rates may cause the value of the Fund's investments to decline significantly.

Index sampling risk, which is the chance that the securities selected for the Fund, in the aggregate, will not provide investment performance matching that of the Fund's target index. Index sampling risk for the Fund should be low.

An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
May Lose Money rr_RiskLoseMoney

An investment in the Fund could lose money over short or even long periods.

Not Insured Depository Institution rr_RiskNotInsuredDepositoryInstitution

An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Bar Chart and Performance Table rr_BarChartAndPerformanceTableHeading Annual Total Returns
Performance Information Illustrates Variability of Returns rr_PerformanceInformationIllustratesVariabilityOfReturns

The following bar chart and table are intended to help you understand the risks of investing in the Fund.
Performance Availability Phone rr_PerformanceAvailabilityPhone

800-662-7447
Performance Availability Website Address rr_PerformanceAvailabilityWebSiteAddress

vanguard.com/performance

Past Performance Does Not Indiciate Future Returns rr_PerformancePastDoesNotIndicateFuture

Keep in mind that the Fund's past performance (before and after taxes) does not indicate how the Fund will perform in the future.

Bar Chart rr_BarChartHeading Annual Total Returns - Vanguard Extended Duration Treasury Index Fund Institutional Shares
Bar Chart Narrative rr_BarChartNarrativeTextBlock

The following bar chart and table are intended to help you understand the risks of investing in the Fund. The bar chart shows how the performance of the Fund's Institutional Shares(including operating expenses but excluding shareholder fees) has varied from one calendar year to another over the periods shown. The table shows how the average annual total returns of the Institutional Shares (including operating expenses and any applicable shareholder fees) compare with those of the Fund's target index, which has investment characteristics similar to those of the Fund. Keep in mind that the Fund's past performance (before and after taxes) does not indicate how the Fund will perform in the future. Updated performance information is available on our website at vanguard.com/performance or by calling Vanguard toll-free at 800-662-7447.
Bar Chart Footnotes rr_BarChartFootnotesTextBlock

1 If applicable shareholder fees were reflected, returns would be less that those shown. The year-to-date return as of the most recent calendar quarter, which ended on March 31, 2012 was -10.99%
Bar Chart Closing rr_BarChartClosingTextBlock

During the periods shown in the bar chart, the highest return for a calendar quarter was 52.05% (quarter ended September 30, 2011 ), and the lowest return for a quarter was -20.01% (quarter ended March 31, 2009 ).
Year to Date Return Label rr_YearToDateReturnLabel The year-to-date return as of the most recent calendar quarter, which ended on March 31, 2012
Highest Quarterly Return Label rr_HighestQuarterlyReturnLabel (quarter ended September 30, 2011 )
Lowest Quarterly Return Label rr_LowestQuarterlyReturnLabel (quarter ended March 31, 2009 )
Bar Chart and Performance Table: rr_PerformanceTableHeading Average Annual Total Returns for Periods Ended December 31, 2011
Index No Deduction for Fees, Expenses, Taxes rr_IndexNoDeductionForFeesExpensesTaxes (reflects no deduction for fees, expenses, or taxes)
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate

When after-tax returns are calculated, it is assumed that the shareholder was in the highest individual federal marginal income tax bracket at the time of each distribution of income or capital gains or upon redemption.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred

Please note that after-tax returns are not relevant for a shareholder who holds fund shares in a tax-deferred account, such as an individual retirement account or a 401(k) plan.
Performance Table Explains why after Tax Higher rr_PerformanceTableExplanationAfterTaxHigher

Also, figures captioned Return After Taxes on Distributions and Sale of Fund Shares will be higher than other figures for the same period if a capital loss occurs upon redemption and results in an assumed tax deduction for the shareholder.
Performance Table Closing rr_PerformanceTableClosingTextBlock

Actual after-tax returns depend on your tax situation and may differ from those shown in the preceding table. When after-tax returns are calculated, it is assumed that the shareholder was in the highest individual federal marginal income tax bracket at the time of each distribution of income or capital gains or upon redemption. State and local income taxes are not reflected in the calculations. Please note that after-tax returns are not relevant for a shareholder who holds fund shares in a tax-deferred account, such as an individual retirement account or a 401(k) plan. Also, figures captioned Return After Taxes on Distributions and Sale of Fund Shares will be higher than other figures for the same period if a capital loss occurs upon redemption and results in an assumed tax deduction for the shareholder.
Vanguard Extended Duration Treasury Index Fund | Vanguard Extended Duration Treasury Index Fund - ETF Shares
  
Risk/Return: rr_RiskReturnAbstract  
Management Expenses rr_ManagementFeesOverAssets 0.08%
12b-1 Distribution Fee rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.05%
Total Annual Fund Operating Expenses rr_NetExpensesOverAssets 0.13%
1 YEAR rr_ExpenseExampleNoRedemptionYear01 13
3 YEAR rr_ExpenseExampleNoRedemptionYear03 42
5 YEAR rr_ExpenseExampleNoRedemptionYear05 73
10 YEAR rr_ExpenseExampleNoRedemptionYear10 166
Annual Return Inception Date rr_AnnualReturnInceptionDate Dec. 06, 2007
2008 rr_AnnualReturn2008 55.40%
2009 rr_AnnualReturn2009 (36.66%)
2010 rr_AnnualReturn2010 10.27%
2011 rr_AnnualReturn2011 55.81%
Date rr_BarChartYearToDateReturnDate Mar. 31, 2012
Year to Date Return rr_BarChartYearToDateReturn (10.99%)
Bar Chart Highest Quarterly Return Date rr_BarChartHighestQuarterlyReturnDate Sep. 30, 2011
Bar Chart Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 52.06%
Bar Chart Lowest Quarter Return Date rr_BarChartLowestQuarterlyReturnDate Mar. 31, 2009
Bar Chart Lowest Quarter Return rr_BarChartLowestQuarterlyReturn (20.01%)
One Year rr_AverageAnnualReturnYear01 55.81%
Since Inception rr_AverageAnnualReturnSinceInception 13.95%
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 06, 2007
Vanguard Extended Duration Treasury Index Fund | Vanguard Extended Duration Treasury Index Fund - Institutional Shares
  
Risk/Return: rr_RiskReturnAbstract  
Sales charge (load) imposed on purchases rr_MaximumCumulativeSalesChargeOverOfferingPrice none
Purchase Fee rr_MaximumCumulativeSalesChargeOverOther 0.50%
Sales charge (load) imposed on reinvested dividends rr_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther none
Redemption Fee rr_RedemptionFeeOverRedemption none
Account Service Fee (for fund account balances below $10,000) rr_MaximumAccountFee none
Management Expenses rr_ManagementFeesOverAssets 0.07%
12b-1 Distribution Fee rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.04%
Total Annual Fund Operating Expenses rr_NetExpensesOverAssets 0.11%
1 YEAR rr_ExpenseExampleNoRedemptionYear01 61
3 YEAR rr_ExpenseExampleNoRedemptionYear03 85
5 YEAR rr_ExpenseExampleNoRedemptionYear05 112
10 YEAR rr_ExpenseExampleNoRedemptionYear10 190
Annual Return Inception Date rr_AnnualReturnInceptionDate Nov. 28, 2007
2008 rr_AnnualReturn2008 55.52%
2009 rr_AnnualReturn2009 (36.65%)
2010 rr_AnnualReturn2010 10.28%
2011 rr_AnnualReturn2011 55.79%
Date rr_BarChartYearToDateReturnDate Mar. 31, 2012
Year to Date Return rr_BarChartYearToDateReturn (10.99%)
Bar Chart Highest Quarterly Return Date rr_BarChartHighestQuarterlyReturnDate Sep. 30, 2011
Bar Chart Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 52.05%
Bar Chart Lowest Quarter Return Date rr_BarChartLowestQuarterlyReturnDate Mar. 31, 2009
Bar Chart Lowest Quarter Return rr_BarChartLowestQuarterlyReturn (20.01%)
One Year rr_AverageAnnualReturnYear01 55.40%
Since Inception rr_AverageAnnualReturnSinceInception 13.30%
Inception Date rr_AverageAnnualReturnInceptionDate Nov. 28, 2007
Vanguard Extended Duration Treasury Index Fund | Vanguard Extended Duration Treasury Index Fund - Institutional Plus Shares
  
Risk/Return: rr_RiskReturnAbstract  
Sales charge (load) imposed on purchases rr_MaximumCumulativeSalesChargeOverOfferingPrice none
Purchase Fee rr_MaximumCumulativeSalesChargeOverOther 0.50%
Sales charge (load) imposed on reinvested dividends rr_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther none
Redemption Fee rr_RedemptionFeeOverRedemption none
Account Service Fee (for fund account balances below $10,000) rr_MaximumAccountFee none
Management Expenses rr_ManagementFeesOverAssets 0.04%
12b-1 Distribution Fee rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.04%
Total Annual Fund Operating Expenses rr_NetExpensesOverAssets 0.08%
1 YEAR rr_ExpenseExampleNoRedemptionYear01 58
3 YEAR rr_ExpenseExampleNoRedemptionYear03 76
5 YEAR rr_ExpenseExampleNoRedemptionYear05 95
10 YEAR rr_ExpenseExampleNoRedemptionYear10 152
Barclays Capital U.S. Treasury STRIPS 20-30 Year Equal Par Bond Index | Vanguard Extended Duration Treasury Index Fund | Vanguard Extended Duration Treasury Index Fund - ETF Shares
  
Risk/Return: rr_RiskReturnAbstract  
One Year rr_AverageAnnualReturnYear01 56.24%
Since Inception rr_AverageAnnualReturnSinceInception 14.55%
Barclays Capital U.S. Treasury STRIPS 20-30 Year Equal Par Bond Index | Vanguard Extended Duration Treasury Index Fund | Vanguard Extended Duration Treasury Index Fund - Institutional Shares
  
Risk/Return: rr_RiskReturnAbstract  
One Year rr_AverageAnnualReturnYear01 56.24%
Since Inception rr_AverageAnnualReturnSinceInception 13.83%