Label	Element	Value
Risk/Return:	rr_RiskReturnAbstract
Registrant Name	dei_EntityRegistrantName	PROSHARES TRUST
Prospectus Date	rr_ProspectusDate	Oct. 01, 2013
ProShares Large Cap Core Plus
Risk/Return:	rr_RiskReturnAbstract
Risk/Return [Heading]	rr_RiskReturnHeading	LARGE CAP CORE PLUS
Objective [Heading]	rr_ObjectiveHeading	Investment Objective
Objective, Primary [Text Block]	rr_ObjectivePrimaryTextBlock	ProShares Large Cap Core Plus (the “Fund”) seeks investment results that, before fees and expenses, track the performance of the Credit Suisse 130/30 Large Cap Index (the “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 or hold shares of the Fund.
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	September 30, 2014
Portfolio Turnover [Heading]	rr_PortfolioTurnoverHeading	Portfolio Turnover
Portfolio Turnover [Text Block]	rr_PortfolioTurnoverTextBlock	The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover may indicate higher transaction costs and may result in higher taxes when the Fund’s shares are held in a taxable account. These costs, which are not reflected in Annual Fund Operating Expenses or in the example above, affect the Fund’s performance. During the most recent fiscal year, the Fund’s annual portfolio turnover rate was 75% of the average value of its entire portfolio. This portfolio turnover rate is calculated without regard to derivatives transactions. If such transactions were included, the Fund’s portfolio turnover rate may be significantly higher.
Portfolio Turnover, Rate	rr_PortfolioTurnoverRate	75.00%
Expense Exchange Traded Fund Commissions [Text]	rr_ExpenseExchangeTradedFundCommissions	In addition, investors may pay brokerage commissions on their purchases and sales of the Fund’s shares. These costs are not reflected in the table or the example above.
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. 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 each period. The example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same, except that the fee waiver/expense reimbursement is assumed only to pertain to the first year. Although your actual cost may be higher or lower, based on these assumptions your approximate costs would be:
Expense Example Closing [Text Block]	rr_ExpenseExampleClosingTextBlock	The Fund pays transaction and financing costs associated with the purchase and sale of securities and derivatives. In addition, investors may pay brokerage commissions on their purchases and sales of the Fund’s shares. These costs are not reflected in the table or the example above.
Strategy [Heading]	rr_StrategyHeading	Principal Investment Strategies
Strategy Narrative [Text Block]	rr_StrategyNarrativeTextBlock	The Fund invests in securities and derivatives that ProShare Advisors believes, in combination, should track the performance of the Index. The Index is designed to replicate an investment strategy that establishes either long or short positions in the stocks of certain of the 500 largest U.S. companies based on market capitalization (the “Universe”) by applying a rules-based ranking and weighting methodology. The Index intends to provide a representation of a quantitatively constructed 130/30 U.S. large cap equity strategy. This results in the Index having total long exposure of 130% and total short exposure of 30% at each monthly reconstitution date. In determining individual constituents and weightings consideration is given to 50 factors including fundamental data from financial statements, consensus earnings forecasts, market pricing and volume data. These 50 factors are grouped into ten equal-weighted factor composites in the following categories: 1) Traditional Value; 2) Relative Value; 3) Historical Growth; 4) Expected Growth; 5) Profit Trends; 6) Accelerating Sales; 7) Earnings Momentum; 8) Price Momentum; 9) Price Reversal; and 10) Small Size. The Index will have risk characteristics similar to the Universe and will generally rise and fall with the Universe, with the goal, but not the guarantee, of incremental risk-adjusted outperformance as compared to the Universe. As of June 30, 2013, the Index contained 262 long and 114 short positions. The Index is published under the Bloomberg ticker symbol “CS13030.” The long portion (i.e., +130) of the Index is published under the Bloomberg ticker symbol “CS130L” and the short portion (i.e., -30) of the Index is published separately under the Bloomberg ticker symbol “CS130S.” For a further description of the Index, please see “Additional Information on Certain Underlying Indexes” in the back of the Fund’s Full Prospectus. The securities and derivatives that the Fund will principally invest in are set forth below. Equity Securities — The Fund invests in common stock issued by public companies. Derivatives — The Fund invests in derivatives, which are financial instruments whose value is derived from the value of an underlying asset or assets, such as stocks, bonds or funds (including exchange-traded funds (“ETFs”)), interest rates or indexes. The Fund invests in derivatives as a substitute for investing directly in or taking short positions in the equity securities comprising the Index. These derivatives principally include: Swap Agreements — Contracts entered into primarily with major global financial institutions for a specified period ranging from a day to more than one year. In a standard “swap” transaction, two parties agree to exchange the return (or differentials in rates of return) earned or realized on particular predetermined investments or instruments. The gross return to be exchanged or “swapped” between the parties is calculated with respect to a “notional amount,” e.g., the return on or change in value of a particular dollar amount invested in a “basket” of securities representing a particular index. ProShare Advisors follows a passive approach to investing that is designed to track the performance of the Index. The Fund attempts to track the performance of the Index by investing all, or substantially all, of its assets in investments that make up the Index or in financial instruments that provide similar exposure. The Fund may invest in or gain exposure to only a representative sample of the securities in the Index or to securities not contained in the Index or in financial instruments, with the intent of obtaining exposure with aggregate characteristics similar to those of the Index. ProShare Advisors does not invest the assets of the Fund in securities or financial instruments based on ProShare Advisors’ view of the investment merit of a particular security or instrument, nor does it conduct conventional investment research or analysis or forecast market movement or trends, in managing the assets of the Fund. The Fund seeks to remain fully invested at all times in securities and/or financial instruments that, in combination, provide exposure to the Index without regard to market conditions, trends or direction. The Fund will concentrate its investments in a particular industry or group of industries to approximately the same extent as the Index is so concentrated. As of the close of business on June 30, 2013, the Index was concentrated in the consumer, non-cyclical industry group, which comprised approximately 26.98% of the market capitalization of the Index’s long exposure. Please see “Investment Objectives, Principal Investment Strategies and Related Risks” in the back of the Fund’s Full Prospectus for additional details.
Risk [Heading]	rr_RiskHeading	Principal Risks
Risk Narrative [Text Block]	rr_RiskNarrativeTextBlock	You could lose money by investing in the Fund. Risks Associated with the Use of Derivatives — The Fund obtains investment exposure through derivatives, which may be considered aggressive. Investing in derivatives may expose the Fund to greater risks than investing directly in the reference asset(s) underlying those derivatives, such as counterparty risk, liquidity risk and increased correlation risk (each as discussed below). When the Fund uses derivatives, there may be imperfect correlation between the value of the reference asset(s) and the derivative, which may prevent the Fund from achieving its investment objective. Moreover, with respect to the use of swap agreements, if the Index has a dramatic intraday move that causes a material decline in the Fund’s net assets, the terms of a swap agreement between the Fund and its counterparty may permit the counterparty to immediately close out the transaction with the Fund. In that event, the Fund may be unable to enter into another swap agreement or invest in other derivatives to achieve the desired exposure consistent with the Fund’s investment objective. This, in turn, may prevent the Fund from achieving its investment objective, even if the Index reverses all or a portion of its intraday move by the end of the day. Any costs associated with using derivatives may also have the effect of lowering the Fund’s return. Long/Short Risk — The Fund seeks long exposure to certain securities and short exposure to certain other securities. There is no guarantee that the returns on the Fund’s long or short positions will produce high, or even positive, returns and the Fund could lose money if either or both the Fund’s long and short positions produce negative returns. In addition, the Fund may gain enhanced long exposure to certain securities (i.e., obtain investment exposure that exceeds the amount directly invested in those assets, a form of leverage) and, under such circumstances, will lose more money in market environments that are adverse to its long positions than funds that do not employ such leverage. As a result, such investments may give rise to losses that exceed the amount invested in those assets. Correlation Risk — A number of factors may affect the Fund’s ability to achieve a high degree of correlation with the Index, and there is no guarantee that the Fund will achieve a high degree of correlation. Failure to achieve a high degree of correlation may prevent the Fund from achieving its investment objective. The factors that may adversely affect the Fund’s correlation with the Index include fees, expenses, transaction costs, income items, valuation methodology, accounting standards and disruptions or illiquidity in the markets for the securities or financial instruments in which the Fund invests. The Fund may not have investment exposure to all securities in the Index, or its weighting of investment exposure to securities may be different from that of the Index. In addition, the Fund may invest in securities not included in the Index or in financial instruments. The Fund may also be subject to large movements of assets into and out of the Fund, potentially resulting in the Fund being over- or underexposed to the Index and may be impacted by Index reconstitutions and Index rebalancing events. Any of these factors could decrease correlation between the performance of the Fund and the Index and may hinder the Fund’s ability to meet its investment objective. Consumer Goods Industry Risk — The Fund is subject to risks faced by companies in the consumer goods economic sector to the same extent as the Index is so concentrated, including: governmental regulation affecting the permissibility of using various food additives and production methods could affect profitability; new laws or litigation that may adversely affect tobacco companies; fads, marketing campaigns and other factors affecting supply and demand that may strongly affect securities prices and profitability of food, soft drink and fashion related products; and international events that may affect food and beverage companies that derive a substantial portion of their net income from foreign countries. Counterparty Risk — The Fund will be subject to credit risk (i.e., the risk that a counterparty is unwilling or unable to make timely payments to meet its contractual obligations) with respect to the amount it expects to receive from counterparties to financial instruments and repurchase agreements entered into by the Fund. If a counterparty becomes bankrupt or fails to perform its obligations, the value of an investment in the Fund may decline. Early Close/Late Close/Trading Halt Risk — An exchange or market may close early, close late or issue trading halts on specific securities, or the ability to buy or sell certain securities or financial instruments may be restricted, which may result in the Fund being unable to buy or sell certain securities or financial instruments. In these circumstances, the Fund may be unable to rebalance its portfolio, may be unable to accurately price its investments and/or may incur substantial trading losses. Equity and Market Risk — The equity markets are volatile, and the value of securities, swaps and other instruments correlated with the equity markets may fluctuate dramatically from day-to-day. Equity markets are subject to corporate, political, regulatory, market and economic developments, as well as developments that impact specific economic sectors, industries or segments of the market. Further, stocks in the Index may underperform other equity investments. Volatility in the markets and/or market developments may cause the value of an investment in the Fund to decrease. Index Performance Risk — There is no guarantee or assurance that the methodology used to create the Index will result in the Fund achieving high, or even positive, returns. The Index may underperform more traditional indices. In turn, the Fund could lose value while other indices or measures of market performance increase in value. Liquidity Risk — In certain circumstances, such as the disruption of the orderly markets for the securities or financial instruments in which the Fund invests, the Fund might not be able to acquire or dispose of certain holdings quickly or at prices that represent true market value in the judgment of ProShare Advisors. Markets for the securities or financial instruments in which the Fund invests may be disrupted by a number of events, including but not limited to economic crises, natural disasters, new legislation, or regulatory changes inside or outside of the U.S. For example, regulation limiting the ability of certain financial institutions to invest in certain securities would likely reduce the liquidity of those securities. These situations may prevent the Fund from limiting losses, realizing gains or achieving a high correlation with the Index. Market Price Variance Risk — The Fund’s shares are listed for trading on the NYSE Arca and can be bought and sold in the secondary market at market prices. The market prices of shares will fluctuate in response to changes in the value of the Fund’s holdings and supply and demand for shares. ProShare Advisors cannot predict whether shares will trade above, below or at a price equal to the value of the Fund’s holdings. Given the fact that shares can be created and redeemed in Creation Units, as defined below, ProShare Advisors believes that large discounts or premiums to the value of the Fund’s holdings should not be sustained. The Fund’s investment results are measured based upon the daily net asset value (“NAV”) of the Fund. Investors purchasing and selling shares in the secondary market may not experience investment results consistent with those experienced by investors creating and redeeming shares directly with the Fund. Non-Diversification Risk — The Fund is classified as “non-diversified” under the Investment Company Act of 1940, and has the ability to invest a relatively high percentage of its assets in the securities of a small number of issuers susceptible to a single economic, political or regulatory event. This may increase the Fund’s volatility and cause performance of a relatively smaller number of issuers to have a greater impact on the Fund’s performance. This risk may be particularly acute if the Index is comprised of a small number of securities. Portfolio Turnover Risk — Active market trading of the Fund’s shares may cause more frequent creation or redemption activities that could, in certain circumstances, increase the number of portfolio transactions. High levels of transactions increase brokerage and other transaction costs and may result in increased taxable capital gains. Short Sale Exposure Risk — The Fund may seek inverse or “short” exposure through financial instruments such as swap agreements, which may cause the Fund to be exposed to certain risks associated with selling securities short. These risks include, under certain market conditions, an increase in the volatility and decrease in the liquidity of securities underlying the short position, which may lower the Fund’s return, result in a loss, have the effect of limiting the Fund’s ability to obtain inverse exposure through financial instruments such as swap agreements, or require the Fund to seek inverse exposure through alternative investment strategies that may be less desirable or may be more costly to implement. To the extent that, at any particular point in time, the securities underlying the short position may be thinly traded or have a limited market, including due to regulatory action, the Fund may be unable to meet its investment objective due to a lack of available securities or counterparties. During such periods, the Fund’s ability to issue additional Creation Units may be adversely affected. Obtaining inverse exposure through these instruments may be considered an aggressive investment technique. Please see “Investment Objectives, Principal Investment Strategies and Related Risks” in the back of the Fund’s Full Prospectus for additional details.
Risk Lose Money [Text]	rr_RiskLoseMoney	You could lose money by investing in the Fund.
Risk Nondiversified Status [Text]	rr_RiskNondiversifiedStatus	Non-Diversification Risk — The Fund is classified as “non-diversified” under the Investment Company Act of 1940, and has the ability to invest a relatively high percentage of its assets in the securities of a small number of issuers susceptible to a single economic, political or regulatory event. This may increase the Fund’s volatility and cause performance of a relatively smaller number of issuers to have a greater impact on the Fund’s performance. This risk may be particularly acute if the Index is comprised of a small number of securities.
Bar Chart and Performance Table [Heading]	rr_BarChartAndPerformanceTableHeading	Investment Results
Performance Narrative [Text Block]	rr_PerformanceNarrativeTextBlock	The bar chart below shows how the Fund’s investment results have varied from year to year, and the table shows how the Fund’s average annual total returns for various periods compare with a broad measure of market performance. This information provides some indication of the risks of investing in the Fund. Past results (before and after taxes) are not predictive of future results. Updated information on the Fund’s results can be obtained by visiting ProShares.com.
Performance Information Illustrates Variability of Returns [Text]	rr_PerformanceInformationIllustratesVariabilityOfReturns	The bar chart below shows how the Fund’s investment results have varied from year to year, and the table shows how the Fund’s average annual total returns for various periods compare with a broad measure of market performance.
Performance Availability Website Address [Text]	rr_PerformanceAvailabilityWebSiteAddress	ProShares.com
Performance Past Does Not Indicate Future [Text]	rr_PerformancePastDoesNotIndicateFuture	Past results (before and after taxes) are not predictive of future results.
Bar Chart [Heading]	rr_BarChartHeading	Annual Returns as of December 31 each year
Bar Chart Closing [Text Block]	rr_BarChartClosingTextBlock	Best Quarter (ended 3/31/2012): 12.17% Worst Quarter (ended 9/30/2011): -14.98% The year-to-date return as of the most recent quarter, which ended June 30, 2013, was 16.04%.
Performance Table Heading	rr_PerformanceTableHeading	Average Annual Total Returns As of December 31, 2012
Index No Deduction for Fees, Expenses, Taxes [Text]	rr_IndexNoDeductionForFeesExpensesTaxes	Reflects no deduction for fees, expenses or taxes.
Performance Table Uses Highest Federal Rate	rr_PerformanceTableUsesHighestFederalRate	After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes.
Performance Table Not Relevant to Tax Deferred	rr_PerformanceTableNotRelevantToTaxDeferred	Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. After-tax returns shown are not relevant to investors who hold shares through tax-deferred arrangements, such as a retirement account.
Performance Table Explanation after Tax Higher	rr_PerformanceTableExplanationAfterTaxHigher	After-tax returns may exceed the return before taxes due to a tax benefit from realizing a capital loss on a sale of shares.
Performance Table Narrative	rr_PerformanceTableNarrativeTextBlock	Average annual total returns are shown on a before- and after-tax basis for the Fund. After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. After-tax returns shown are not relevant to investors who hold shares through tax-deferred arrangements, such as a retirement account. After-tax returns may exceed the return before taxes due to a tax benefit from realizing a capital loss on a sale of shares.
ProShares Large Cap Core Plus | ProShares Large Cap Core Plus
Risk/Return:	rr_RiskReturnAbstract
Investment Advisory Fees	rr_ManagementFeesOverAssets	0.75%
Other Expenses	rr_OtherExpensesOverAssets	0.34%
Total Annual Fund Operating Expenses Before Fee Waivers and Expense Reimbursements	rr_ExpensesOverAssets	1.09%
Fee Waiver/Reimbursement	rr_FeeWaiverOrReimbursementOverAssets	(0.64%)	[1]
Total Annual Fund Operating Expenses After Fee Waivers and Expense Reimbursements	rr_NetExpensesOverAssets	0.45%
1 Year	rr_ExpenseExampleYear01	$ 46
3 Years	rr_ExpenseExampleYear03	283
5 Years	rr_ExpenseExampleYear05	539
10 Years	rr_ExpenseExampleYear10	$ 1,271
2010	rr_AnnualReturn2010	14.22%
2011	rr_AnnualReturn2011	0.68%
2012	rr_AnnualReturn2012	16.28%
Year to Date Return, Label	rr_YearToDateReturnLabel	year-to-date return
Bar Chart, Year to Date Return, Date	rr_BarChartYearToDateReturnDate	Jun. 30, 2013
Bar Chart, Year to Date Return	rr_BarChartYearToDateReturn	16.04%
Highest Quarterly Return, Label	rr_HighestQuarterlyReturnLabel	Best Quarter
Highest Quarterly Return, Date	rr_BarChartHighestQuarterlyReturnDate	Mar. 31, 2012
Highest Quarterly Return	rr_BarChartHighestQuarterlyReturn	12.17%
Lowest Quarterly Return, Label	rr_LowestQuarterlyReturnLabel	Worst Quarter
Lowest Quarterly Return, Date	rr_BarChartLowestQuarterlyReturnDate	Sep. 30, 2011
Lowest Quarterly Return	rr_BarChartLowestQuarterlyReturn	(14.98%)
One Year	rr_AverageAnnualReturnYear01	16.28%
Since Inception	rr_AverageAnnualReturnSinceInception	16.20%
Inception Date	rr_AverageAnnualReturnInceptionDate	Jul. 13, 2009
ProShares Large Cap Core Plus | After Taxes on Distributions | ProShares Large Cap Core Plus
Risk/Return:	rr_RiskReturnAbstract
One Year	rr_AverageAnnualReturnYear01	16.17%
Since Inception	rr_AverageAnnualReturnSinceInception	16.08%
ProShares Large Cap Core Plus | After Taxes on Distributions and Sale of Shares | ProShares Large Cap Core Plus
Risk/Return:	rr_RiskReturnAbstract
One Year	rr_AverageAnnualReturnYear01	10.72%
Since Inception	rr_AverageAnnualReturnSinceInception	14.10%
ProShares Large Cap Core Plus | Credit Suisse 130/30 Large Cap Index
Risk/Return:	rr_RiskReturnAbstract
One Year	rr_AverageAnnualReturnYear01	17.56%	[2]
Since Inception	rr_AverageAnnualReturnSinceInception	17.48%	[2]

[1] ProShare Advisors LLC (“ProShare Advisors”) has contractually agreed to waive Investment Advisory and Management Services Fees and to reimburse Other Expenses to the extent Total Annual Fund Operating Expenses Before Fee Waivers and Expense Reimbursements, as a percentage of average daily net assets, exceed 0.45% through September 30, 2014. After that date, the expense limitation may be terminated or revised. Amounts waived or reimbursed in a particular contractual period may be recouped by ProShare Advisors within five years of the end of that contractual period to the extent that recoupment will not cause the Fund’s expenses to exceed any expense limitation in place at that time.

[2] Reflects no deduction for fees, expenses or taxes. Adjusted to reflect the reinvestment of dividends paid by companies in the Index. Since inception returns are calculated from the date the Fund commenced operations, not the date of inception of the Index.