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Risk/Return:rr_RiskReturnAbstract 
Document Typedei_DocumentType485BPOS
Document Period End Datedei_DocumentPeriodEndDateOct. 14, 2011
Registrant Namedei_EntityRegistrantNameSCHWAB STRATEGIC TRUST
Central Index Keydei_EntityCentralIndexKey0001454889
Amendment Flagdei_AmendmentFlagfalse
Document Creation Datedei_DocumentCreationDateOct. 14, 2011
Document Effective Datedei_DocumentEffectiveDateOct. 14, 2011
Prospectus Daterr_ProspectusDateOct. 14, 2011
Schwab U.S. Small-Cap Growth ETF
 
Risk/Return:rr_RiskReturnAbstract 
Risk/Return [Heading]rr_RiskReturnHeadingSchwab U.S. Small-Cap Growth ETFTM
Objective [Heading]rr_ObjectiveHeadingInvestment objective
Objective, Primary [Text Block]rr_ObjectivePrimaryTextBlockThe fund’s goal is to track as closely as possible, before fees and expenses, the total return of the Dow Jones U.S. Small-Cap Growth Total Stock Market IndexSM.[1]
Fund fees and expensessst1454889_FundFeesAndExpensesAbstract 
Expense [Heading]rr_ExpenseHeadingFund fees and expenses
Expense Narrative [Text Block]rr_ExpenseNarrativeTextBlockThis table describes the fees and expenses you may pay if you buy and hold shares of the fund. The table does not reflect brokerage commissions you may incur when buying or selling fund shares.
Shareholder feesrr_ShareholderFeesAbstract 
Shareholder Fees Caption [Text]rr_ShareholderFeesCaptionShareholder fees (fees paid directly from your investment)
Shareholder feesrr_ShareholderFeeOther none
Annual fund operating expensesrr_OperatingExpensesAbstract 
Operating Expenses Caption [Text]rr_OperatingExpensesCaptionAnnual fund operating expenses (expenses that you pay each year as a % of the value of your investment)
Management feesrr_ManagementFeesOverAssets 
Other expensesrr_OtherExpensesOverAssets none
Total annual operating expensesrr_ExpensesOverAssets 
Examplerr_ExpenseExampleAbstract 
Expense Example [Heading]rr_ExpenseExampleHeadingExample
Expense Example Narrative [Text Block]rr_ExpenseExampleNarrativeTextBlockThis 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 those time periods. The example also assumes that your investment has a 5% return each year and that the fund’s operating expenses remain the same. This example does not reflect any brokerage commissions you may incur when buying or selling fund shares. Your actual costs may be higher or lower.
Expense Example by, Year, Caption [Text]rr_ExpenseExampleByYearCaptionExpenses on a $10,000 investment
1 yearrr_ExpenseExampleYear01 
3 yearsrr_ExpenseExampleYear03 
Portfolio turnoversst1454889_PortfolioTurnoverAltAbstract 
Portfolio Turnover [Heading]rr_PortfolioTurnoverHeadingPortfolio turnover
Portfolio Turnover [Text Block]rr_PortfolioTurnoverTextBlockThe 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 fund shares are held in a taxable account. These costs, which are not reflected in the annual fund operating expenses or in the example, affect the fund’s performance. The fund is new and therefore does not have a historical portfolio turnover rate.
Strategy [Heading]rr_StrategyHeadingPrincipal investment strategies
Strategy Narrative [Text Block]rr_StrategyNarrativeTextBlock

To pursue its goal, the fund generally invests in stocks that are included in the index. The index includes the small-cap growth portion of the Dow Jones U.S. Total Stock Market IndexSM actually available to investors in the marketplace. The Dow Jones U.S. Small-Cap Growth Total Stock Market IndexSM includes the components ranked 751-2500 by full market capitalization and that are classified as “growth” based on a number of factors. The index is a float-adjusted market capitalization weighted index. As of [date], the index was composed of [xx] stocks.

It is the fund’s policy that under normal circumstances it will invest at least 90% of its net assets in these stocks. The fund will notify its shareholders at least 60 days before changing this policy. The fund will generally give the same weight to a given stock as the index does. However, when the Adviser believes it is appropriate to do so, such as to avoid purchasing odd-lots (i.e., purchasing less than the usual number of shares traded for a security), for tax considerations, or to address liquidity considerations with respect to a stock, the Adviser may cause the fund’s weighting of a stock to be more or less than the index’s weighting of the stock. The fund may sell securities that are represented in the index in anticipation of their removal from the index, or buy securities that are not yet represented in the index in anticipation of their addition to the index.

Under normal circumstances, the fund may invest up to 10% of its net assets in securities not included in its index. The principal types of these investments include those that the Adviser believes will help the fund track the index, such as investments in (a) securities that are not represented in the index but the Adviser anticipates will be added to the index, (b) other investment companies, and (c) derivatives, principally futures contracts. The fund may use futures contracts and other derivatives primarily to seek returns on the fund’s otherwise uninvested cash assets to help it better track the index. The fund may also invest in cash and cash equivalents, and may lend its securities to minimize the difference in performance that naturally exists between an index fund and its corresponding index.

The fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry, group of industries or sector to approximately the same extent that its index is so concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities), and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

The Adviser seeks to achieve, over time, a correlation between the fund’s performance and that of its index, before fees and expenses, of 95% or better. However, there can be no guarantee that the fund will achieve a high degree of correlation with the index. A number of factors may affect the fund’s ability to achieve a high correlation with its index. The correlation between the performance of the fund and its index may also diverge due to transaction costs, asset valuations, corporate actions (such as mergers and spin-offs), timing variances, and differences between the fund’s portfolio and the index resulting from legal restrictions (such as diversification requirements) that apply to the fund but not to the index.

Strategy Portfolio Concentration [Text]rr_StrategyPortfolioConcentrationTo pursue its goal, the fund generally invests in stocks that are included in the index. The index includes the small-cap growth portion of the Dow Jones U.S. Total Stock Market IndexSM actually available to investors in the marketplace.
Risk [Heading]rr_RiskHeadingPrincipal risks
Risk Narrative [Text Block]rr_RiskNarrativeTextBlock

The fund is subject to risks, any of which could cause an investor to lose money. The fund’s principal risks include:

Market Risk. Stock markets rise and fall daily. As with any investment whose performance is tied to these markets, the value of your investment in the fund will fluctuate, which means that you could lose money.

Investment Style Risk. The fund is not actively managed. Therefore, the fund follows the securities included in the index during upturns as well as downturns. Because of its indexing strategy, the fund does not take steps to reduce market exposure or to lessen the effects of a declining market. In addition, because of the fund’s expenses, the fund’s performance is normally below that of the index.

Equity Risk. The prices of equity securities rise and fall daily. These price movements may result from factors affecting individual companies, industries or the securities market as a whole. In addition, equity markets tend to move in cycles, which may cause stock prices to fall over short or extended periods of time.

Small-Cap Risk. Historically, small-cap stocks have been riskier than large- and mid-cap stocks, and their prices may move sharply, especially during market upturns and downturns. Small-cap companies may be more vulnerable to adverse business or economic events than larger, more established companies. During a period when small-cap stocks fall behind other types of investments — large-cap and mid-cap stocks, for instance — the fund’s small-cap holdings could reduce performance.

Growth Investing Risk. Growth stocks can be volatile. Growth companies usually invest a high portion of earnings in their businesses and may lack the dividends of value stocks that can cushion stock prices in a falling market. The prices of growth stocks are based largely on projections of the issuer’s future earnings and revenues. If a company’s earnings or revenues fall short of expectations, its stock price may fall dramatically. Growth stocks may also be more expensive relative to their earnings or assets compared to value or other stocks.

Tracking Error Risk. As an index fund, the fund seeks to track the performance of its benchmark index, although it may not be successful in doing so. The divergence between the performance of the fund and its benchmark index, positive or negative, is called “tracking error.” Tracking error can be caused by many factors and it may be significant.

Derivatives Risk. The fund’s use of derivative instruments involves risks different from, or possibly greater than, the risks associated with investing directly in securities and other traditional investments and could cause the fund to lose more than the principal amount invested. In addition, investments in derivatives may involve leverage, which means a small percentage of assets invested in derivatives can have a disproportionately larger impact on the fund.

Liquidity Risk. A particular investment may be difficult to purchase or sell. The fund may be unable to sell illiquid securities at an advantageous time or price.

Securities Lending Risk. Securities lending involves the risk of loss of rights in the collateral or delay in recovery of the collateral if the borrower fails to return the security loaned or becomes insolvent.

Concentration Risk. To the extent that the fund’s or the index’s portfolio is concentrated in the securities of issuers in a particular market, industry, group of industries, sector or asset class, the fund may be adversely affected by the performance of those securities, may be subject to increased price volatility and may be more susceptible to adverse economic, market, political or regulatory occurrences affecting that market, industry, group of industries, sector or asset class.

Market Trading Risk. Although fund shares are listed on national securities exchanges, there can be no assurance that an active trading market for fund shares will develop or be maintained. If an active market is not maintained, investors may find it difficult to buy or sell fund shares.

Shares of the Fund May Trade at Prices Other Than NAV. Fund shares may be bought and sold in the secondary market at market prices. Although it is expected that the market price of the shares of the fund will approximate the fund’s net asset value (NAV), there may be times when the market price and the NAV vary significantly. You may pay more than NAV when you buy shares of the fund in the secondary market, and you may receive less than NAV when you sell those shares in the secondary market.

Lack of Governmental Insurance or Guarantee. An investment in the fund is not a bank deposit and it is not insured or guaranteed by the Federal Deposit Insurance Corporation (FDIC) or any other government agency.

For more information on the risks of investing in the fund please see the “Fund details” section in the prospectus.

Risk Lose Money [Text]rr_RiskLoseMoneyThe fund is subject to risks, any of which could cause an investor to lose money.
Risk Not Insured Depository Institution [Text]rr_RiskNotInsuredDepositoryInstitutionAn investment in the fund is not a bank deposit and it is not insured or guaranteed by the Federal Deposit Insurance Corporation (FDIC) or any other government agency.
Performancesst1454889_FundPastPerformanceAbstract 
Bar Chart and Performance Table [Heading]rr_BarChartAndPerformanceTableHeadingPerformance
Performance Narrative [Text Block]rr_PerformanceNarrativeTextBlockThe fund is new and therefore does not have a performance history. Once the fund has completed a full calendar year of operations a bar chart and table will be included that will provide some indication of the risks of investing in the fund by showing the variability of the fund’s returns and comparing the fund’s performance to the index.
Performance One Year or Less [Text]rr_PerformanceOneYearOrLessThe fund is new and therefore does not have a performance history.
Performance Information Illustrates Variability of Returns [Text]rr_PerformanceInformationIllustratesVariabilityOfReturnsOnce the fund has completed a full calendar year of operations a bar chart and table will be included that will provide some indication of the risks of investing in the fund by showing the variability of the fund’s returns and comparing the fund’s performance to the index.
Schwab U.S. Small-Cap Value ETF
 
Risk/Return:rr_RiskReturnAbstract 
Risk/Return [Heading]rr_RiskReturnHeadingSchwab U.S. Small-Cap Value ETFTM
Objective [Heading]rr_ObjectiveHeadingInvestment objective
Objective, Primary [Text Block]rr_ObjectivePrimaryTextBlockThe fund’s goal is to track as closely as possible, before fees and expenses, the total return of the Dow Jones U.S. Small-Cap Value Total Stock Market IndexSM.[2]
Fund fees and expensessst1454889_FundFeesAndExpensesAbstract 
Expense [Heading]rr_ExpenseHeadingFund fees and expenses
Expense Narrative [Text Block]rr_ExpenseNarrativeTextBlockThis table describes the fees and expenses you may pay if you buy and hold shares of the fund. The table does not reflect brokerage commissions you may incur when buying or selling fund shares.
Shareholder feesrr_ShareholderFeesAbstract 
Shareholder Fees Caption [Text]rr_ShareholderFeesCaptionShareholder fees (fees paid directly from your investment)
Shareholder feesrr_ShareholderFeeOther none
Annual fund operating expensesrr_OperatingExpensesAbstract 
Operating Expenses Caption [Text]rr_OperatingExpensesCaptionAnnual fund operating expenses (expenses that you pay each year as a % of the value of your investment)
Management feesrr_ManagementFeesOverAssets 
Other expensesrr_OtherExpensesOverAssets none
Total annual operating expensesrr_ExpensesOverAssets 
Examplerr_ExpenseExampleAbstract 
Expense Example [Heading]rr_ExpenseExampleHeadingExample
Expense Example Narrative [Text Block]rr_ExpenseExampleNarrativeTextBlockThis 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 those time periods. The example also assumes that your investment has a 5% return each year and that the fund’s operating expenses remain the same. This example does not reflect any brokerage commissions you may incur when buying or selling fund shares. Your actual costs may be higher or lower.
Expense Example by, Year, Caption [Text]rr_ExpenseExampleByYearCaptionExpenses on a $10,000 investment
1 yearrr_ExpenseExampleYear01 
3 yearsrr_ExpenseExampleYear03 
Portfolio turnoversst1454889_PortfolioTurnoverAltAbstract 
Portfolio Turnover [Heading]rr_PortfolioTurnoverHeadingPortfolio turnover
Portfolio Turnover [Text Block]rr_PortfolioTurnoverTextBlockThe 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 fund shares are held in a taxable account. These costs, which are not reflected in the annual fund operating expenses or in the example, affect the fund’s performance. The fund is new and therefore does not have a historical portfolio turnover rate.
Strategy [Heading]rr_StrategyHeadingPrincipal investment strategies
Strategy Narrative [Text Block]rr_StrategyNarrativeTextBlock

To pursue its goal, the fund generally invests in stocks that are included in the index. The index includes the small-cap value portion of the Dow Jones U.S. Total Stock Market IndexSM actually available to investors in the marketplace. The Dow Jones U.S. Small-Cap Value Total Stock Market IndexSM includes the components ranked 751-2500 by full market capitalization and that are classified as “value” based on a number of factors. The index is a float-adjusted market capitalization weighted index. As of [date], the index was composed of [xx] stocks.

It is the fund’s policy that under normal circumstances it will invest at least 90% of its net assets in these stocks. The fund will notify its shareholders at least 60 days before changing this policy. The fund will generally give the same weight to a given stock as the index does. However, when the Adviser believes it is appropriate to do so, such as to avoid purchasing odd-lots (i.e., purchasing less than the usual number of shares traded for a security), for tax considerations, or to address liquidity considerations with respect to a stock, the Adviser may cause the fund’s weighting of a stock to be more or less than the index’s weighting of the stock. The fund may sell securities that are represented in the index in anticipation of their removal from the index, or buy securities that are not yet represented in the index in anticipation of their addition to the index.

Under normal circumstances, the fund may invest up to 10% of its net assets in securities not included in its index. The principal types of these investments include those that the Adviser believes will help the fund track the index, such as investments in (a) securities that are not represented in the index but the Adviser anticipates will be added to the index, (b) other investment companies, and (c) derivatives, principally futures contracts. The fund may use futures contracts and other derivatives primarily to seek returns on the fund’s otherwise uninvested cash assets to help it better track the index. The fund may also invest in cash and cash equivalents, and may lend its securities to minimize the difference in performance that naturally exists between an index fund and its corresponding index.

The fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry, group of industries or sector to approximately the same extent that its index is so concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities), and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

The Adviser seeks to achieve, over time, a correlation between the fund’s performance and that of its index, before fees and expenses, of 95% or better. However, there can be no guarantee that the fund will achieve a high degree of correlation with the index. A number of factors may affect the fund’s ability to achieve a high correlation with its index. The correlation between the performance of the fund and its index may also diverge due to transaction costs, asset valuations, corporate actions (such as mergers and spin-offs), timing variances, and differences between the fund’s portfolio and the index resulting from legal restrictions (such as diversification requirements) that apply to the fund but not to the index.

Strategy Portfolio Concentration [Text]rr_StrategyPortfolioConcentrationTo pursue its goal, the fund generally invests in stocks that are included in the index. The index includes the small-cap value portion of the Dow Jones U.S. Total Stock Market IndexSM actually available to investors in the marketplace.
Risk [Heading]rr_RiskHeadingPrincipal risks
Risk Narrative [Text Block]rr_RiskNarrativeTextBlock

The fund is subject to risks, any of which could cause an investor to lose money. The fund’s principal risks include:

Market Risk. Stock markets rise and fall daily. As with any investment whose performance is tied to these markets, the value of your investment in the fund will fluctuate, which means that you could lose money.

Investment Style Risk. The fund is not actively managed. Therefore, the fund follows the securities included in the index during upturns as well as downturns. Because of its indexing strategy, the fund does not take steps to reduce market exposure or to lessen the effects of a declining market. In addition, because of the fund’s expenses, the fund’s performance is normally below that of the index.

Equity Risk. The prices of equity securities rise and fall daily. These price movements may result from factors affecting individual companies, industries or the securities market as a whole. In addition, equity markets tend to move in cycles, which may cause stock prices to fall over short or extended periods of time.

Small-Cap Risk. Historically, small-cap stocks have been riskier than large- and mid-cap stocks, and their prices may move sharply, especially during market upturns and downturns. Small-cap companies may be more vulnerable to adverse business or economic events than larger, more established companies. During a period when small-cap stocks fall behind other types of investments — large-cap and mid-cap stocks, for instance — the fund’s small-cap holdings could reduce performance.

Value Investing Risk. The fund emphasizes a “value” style of investing, which targets undervalued companies with characteristics for improved valuations. This style of investing is subject to the risk that the valuations never improve or that the returns on “value” securities may not move in tandem with the returns on other styles of investing or the stock market in general.

Tracking Error Risk. As an index fund, the fund seeks to track the performance of its benchmark index, although it may not be successful in doing so. The divergence between the performance of the fund and its benchmark index, positive or negative, is called “tracking error.” Tracking error can be caused by many factors and it may be significant.

Derivatives Risk. The fund’s use of derivative instruments involves risks different from, or possibly greater than, the risks associated with investing directly in securities and other traditional investments and could cause the fund to lose more than the principal amount invested. In addition, investments in derivatives may involve leverage, which means a small percentage of assets invested in derivatives can have a disproportionately larger impact on the fund.

Liquidity Risk. A particular investment may be difficult to purchase or sell. The fund may be unable to sell illiquid securities at an advantageous time or price.

Securities Lending Risk. Securities lending involves the risk of loss of rights in the collateral or delay in recovery of the collateral if the borrower fails to return the security loaned or becomes insolvent.

Concentration Risk. To the extent that the fund’s or the index’s portfolio is concentrated in the securities of issuers in a particular market, industry, group of industries, sector or asset class, the fund may be adversely affected by the performance of those securities, may be subject to increased price volatility and may be more susceptible to adverse economic, market, political or regulatory occurrences affecting that market, industry, group of industries, sector or asset class.

Market Trading Risk. Although fund shares are listed on national securities exchanges, there can be no assurance that an active trading market for fund shares will develop or be maintained. If an active market is not maintained, investors may find it difficult to buy or sell fund shares.

Shares of the Fund May Trade at Prices Other Than NAV. Fund shares may be bought and sold in the secondary market at market prices. Although it is expected that the market price of the shares of the fund will approximate the fund’s net asset value (NAV), there may be times when the market price and the NAV vary significantly. You may pay more than NAV when you buy shares of the fund in the secondary market, and you may receive less than NAV when you sell those shares in the secondary market.

Lack of Governmental Insurance or Guarantee. An investment in the fund is not a bank deposit and it is not insured or guaranteed by the Federal Deposit Insurance Corporation (FDIC) or any other government agency.

For more information on the risks of investing in the fund please see the “Fund details” section in the prospectus.

Risk Lose Money [Text]rr_RiskLoseMoneyThe fund is subject to risks, any of which could cause an investor to lose money.
Risk Not Insured Depository Institution [Text]rr_RiskNotInsuredDepositoryInstitutionAn investment in the fund is not a bank deposit and it is not insured or guaranteed by the Federal Deposit Insurance Corporation (FDIC) or any other government agency.
Performancesst1454889_FundPastPerformanceAbstract 
Bar Chart and Performance Table [Heading]rr_BarChartAndPerformanceTableHeadingPerformance
Performance Narrative [Text Block]rr_PerformanceNarrativeTextBlockThe fund is new and therefore does not have a performance history. Once the fund has completed a full calendar year of operations a bar chart and table will be included that will provide some indication of the risks of investing in the fund by showing the variability of the fund’s returns and comparing the fund’s performance to the index.
Performance One Year or Less [Text]rr_PerformanceOneYearOrLessThe fund is new and therefore does not have a performance history.
Performance Information Illustrates Variability of Returns [Text]rr_PerformanceInformationIllustratesVariabilityOfReturnsOnce the fund has completed a full calendar year of operations a bar chart and table will be included that will provide some indication of the risks of investing in the fund by showing the variability of the fund’s returns and comparing the fund’s performance to the index.
[1]Index ownership - "Dow Jones" and "The Dow Jones U.S. Small-Cap Growth Total Stock Market Index℠" are service marks of Dow Jones Trademark Holdings, LLC ("Dow Jones"), have been licensed to CME Group Index Services LLC ("CME"), and sublicensed for use for certain purposes by CSIM, the fund's investment adviser. Fees payable under the license are payable by CSIM. The Schwab U.S. Small-Cap Growth ETF, based on The Dow Jones U.S. Small-Cap Growth Total Stock Market Index℠, is not sponsored, endorsed, sold or promoted by Dow Jones or CME and neither makes any representation regarding the advisability of trading in such product.
[2]Index ownership - "Dow Jones" and "The Dow Jones U.S. Small-Cap Value Total Stock Market Index℠" are service marks of Dow Jones Trademark Holdings, LLC ("Dow Jones"), have been licensed to CME Group Index Services LLC ("CME"), and sublicensed for use for certain purposes by CSIM, the fund's investment adviser. Fees payable under the license are payable by CSIM. The Schwab U.S. Small-Cap Value ETF, based on The Dow Jones U.S. Small-Cap Value Total Stock Market Index℠, is not sponsored, endorsed, sold or promoted by Dow Jones or CME and neither makes any representation regarding the advisability of trading in such product.