Objective, Primary [Text Block]

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

SPDR® FTSE International Government Inflation-Protected Bond ETF

Objective [Heading]

rr_ObjectiveHeading

Investment Objective

rr_ObjectivePrimaryTextBlock

The SPDR FTSE International Government Inflation-Protected Bond ETF (the “Fund”) seeks to provide investment results that, before fees and expenses, correspond generally to the price and yield performance of an index that tracks the inflation protected sector of the global bond market outside the United States.

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, hold and sell shares of the Fund (“Fund Shares”). You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the table and Example below.

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 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 28% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

28.00%

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 mutual funds. The Example assumes that you invest $10,000 in the Fund for the time periods indicated, and then sell all of your Fund 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

The Fund's Principal Investment Strategy

Strategy Narrative [Text Block]

rr_StrategyNarrativeTextBlock

In seeking to track the performance of the FTSE International Inflation-Linked Securities Select Index (the “Index”), the Fund employs a sampling strategy, which means that the Fund is not required to purchase all of the securities represented in the Index. Instead, the Fund may purchase a subset of the securities in the Index in an effort to hold a portfolio of securities with generally the same risk and return characteristics of the Index. The quantity of holdings in the Fund will be based on a number of factors, including asset size of the Fund. Based on its analysis of these factors, SSGA Funds Management, Inc. (“SSGA FM” or the “Adviser”), the investment adviser to the Fund, either may invest the Fund's assets in a subset of securities in the Index or may invest the Fund's assets in substantially all of the securities represented in the Index in approximately the same proportions as the Index, as determined by the Adviser to be in the best interest of the Fund in pursuing its objective.

Under normal market conditions, the Fund generally invests substantially all, but at least 80%, of its total assets in the securities comprising the Index and in securities that the Adviser determines have economic characteristics that are substantially identical to the economic characteristics of the securities that comprise the Index. In addition, in seeking to track the Index, the Fund may invest in debt securities that are not included in the Index, cash and cash equivalents or money market instruments, such as repurchase agreements and money market funds (including money market funds advised by the Adviser). In seeking to track the Index, the Fund's assets may be concentrated in an industry or

group of industries, but only to the extent that the Index concentrates in a particular industry or group of industries. The Fund may use derivatives, including credit default swaps and credit default index swaps, to obtain investment exposure that the Adviser expects to correlate closely with the Index, or a portion of the Index, and in managing cash flows.

The Index is designed to measure the total return performance of inflation-linked bonds outside the United States with fixed-rate coupon payments that are linked to an inflation index. Inflation-protected public obligations of the inflation-linked government bond markets of developed and emerging market countries, commonly known in the United States as TIPS, are securities issued by such governments that are designed to provide inflation protection to investors. The Index includes government debt (direct obligations of the issuer country) but does not include quasi-government debt or corporate debt. To be included in the Index, bonds must be linked to an inflation index and (i) meet a country-specific minimum issue size, depending on the currency in which the issue is denominated; (ii) have a fixed-rate stated coupon; (iii) have at least one year remaining to maturity at the Index rebalancing date; (iv) settle on or before the Index rebalancing date; and (v) be rated at least C by Standard & Poor's Financial Services LLC (“S&P”) or at least Ca by Moody's Investors Service, Inc. (excluding defaulted issuers). Securities included in the Index may include securities that are subject to restrictions on resale under the U.S. federal securities laws (“restricted securities”).

The Index is a market-value weight, capped total return index, in which the maximum market capitalization-based weights of each individual country in the Index cannot exceed 22.5% of the total Index weight. The total market weights of countries with more than 4.6% market weight in the Index cannot collectively exceed 45% of the total Index weight and the number of countries with more than 4.6% market weight in the Index can be no less than five. If the combined weights of each country with more than 4.6% market weight exceeds 45% of the total Index weight, then the weights of those countries are reduced in proportion to each country's market capitalizations until they sum to 45%, and the weights of the remaining smaller countries are increased in proportion to each country's market capitalizations by the same amount. After the country weights are determined, constituents within each country are assigned weights in proportion to their market capitalization. When an issuer defaults, is assigned a D rating by S&P, or enters into Chapter 7 or Chapter 11 bankruptcy protection in the U.S. (or equivalent in its local market), its bonds remain in the Index until the end of the month. The Index is rebalanced monthly, on the last day of the month. Countries covered in the Index as of February 28, 2021 comprised: Australia, Brazil, Canada, Chile, Colombia, France, Germany, Israel, Italy, Japan, Mexico, New Zealand, South Africa, South Korea, Spain, Sweden, Turkey and the United Kingdom, although this may change from time to time. As of February 28, 2021, a significant portion of the Fund comprised companies located in Europe and the United Kingdom, although this may change from time to time. As of February 28, 2021, there were approximately 170 securities in the Index.

The Index is sponsored by FTSE Russell (the “Index Provider”), which is not affiliated with the Fund or the Adviser. The Index Provider determines the composition of the Index, relative weightings of the securities in the Index and publishes information regarding the market value of the Index.

Risk [Heading]

rr_RiskHeading

Principal Risks of Investing in the Fund

Risk Narrative [Text Block]

rr_RiskNarrativeTextBlock

As with all investments, there are certain risks of investing in the Fund. Fund Shares will change in value, and you could lose money by investing in the Fund. An investment in the Fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.

Market Risk:

The Fund's investments are subject to changes in general economic conditions, general market fluctuations and the risks inherent in investment in securities markets. Investment markets can be volatile and prices of investments can change substantially due to various factors including, but not limited to, economic growth or recession, changes in interest rates, changes in the actual or perceived creditworthiness of issuers, and general market liquidity. The Fund is subject to the risk that geopolitical events will disrupt securities markets and adversely affect global economies and markets. Local, regional or global events such as war, acts of terrorism, the spread of infectious illness or other public health issues, or other events could have a significant impact on the Fund and its investments.

Debt Securities Risk:

The values of debt securities may increase or decrease as a result of the following: market fluctuations, changes in interest rates, actual or perceived inability or unwillingness of issuers, guarantors or liquidity providers to make scheduled principal or interest payments or illiquidity in debt securities markets; the risk of low rates of return due to reinvestment of securities during periods of falling interest rates or repayment by issuers with higher coupon or interest rates; and/or the risk of low income due to falling interest rates. To the extent that interest rates rise, certain underlying obligations may be paid off substantially slower than originally anticipated and the value of those securities may fall sharply. A rising interest rate environment may cause the value of the Fund's fixed income securities to decrease, an adverse impact on the liquidity of the Fund's fixed income securities, and increased volatility of the fixed income markets. The current historically low interest rate

environment heightens the risks associated with rising interest rates. During periods when interest rates are at low levels, the Fund's yield can be low, and the Fund may have a negative yield (i.e., it may lose money on an operating basis). If the principal on a debt obligation is prepaid before expected, the prepayments of principal may have to be reinvested in obligations paying interest at lower rates. During periods of falling interest rates, the income received by the Fund may decline. Changes in interest rates will likely have a greater effect on the values of debt securities of longer durations. Returns on investments in debt securities could trail the returns on other investment options, including investments in equity securities.

Non-U.S. Securities Risk:

Non-U.S. securities are subject to political, regulatory, and economic risks not present in domestic investments. There may be less information publicly available about a non-U.S. entity than about a U.S. entity, and many non-U.S. entities are not subject to accounting, auditing, legal and financial report standards comparable to those in the United States. Further, such entities and/or their securities may be subject to risks associated with currency controls; expropriation; changes in tax policy; greater market volatility; differing securities market structures; higher transaction costs; and various administrative difficulties, such as delays in clearing and settling portfolio transactions or in receiving payment of dividends. To the extent underlying securities held by the Fund trade on foreign exchanges that are closed when the exchange on which the Fund's shares trade is open, there may be deviations between the current price of an underlying security and the last quoted price for the underlying security on the closed foreign market. These deviations could result in the Fund experiencing premiums or discounts greater than those of ETFs that invest in domestic securities. Securities traded on foreign markets may be less liquid (harder to sell) than securities traded domestically. Foreign governments may impose restrictions on the repatriation of capital to the U.S. In addition, to the extent that the Fund buys securities denominated in a foreign currency, there are special risks such as changes in currency exchange rates and the risk that a foreign government could regulate foreign exchange transactions. In addition, to the extent investments are made in a limited number of countries, events in those countries will have a more significant impact on the Fund. Certain countries have recently experienced (or currently are expected to experience) negative interest rates on certain fixed-income securities, and similar interest rate conditions may be experienced in other regions. Investments in fixed-income securities with very low or negative interest rates may magnify the Fund's susceptibility to interest rate risk and diminish yield and performance, and such investments may be subject to heightened volatility and reduced liquidity.

Inflation-Indexed Securities Risk:

The principal amount of an inflation-indexed security typically increases with inflation and decreases with deflation, as measured by a specified index. It is possible that, in a period of declining inflation rates, the Fund could receive at maturity less than the initial principal amount of an inflation-indexed security. Changes in the values of inflation-indexed securities may be difficult to predict, and it is possible that an investment in such securities will have an effect different from that anticipated.

Sovereign Debt Obligations Risk:

Investments in debt securities issued by governments or by government agencies and instrumentalities involve the risk that the governmental entities responsible for repayment may be unable or unwilling to pay interest and repay principal when due. Many sovereign debt obligations may be rated below investment-grade (“junk” bonds). Any restructuring of a sovereign debt obligation held by the Fund will likely have a significant adverse effect on the value of the obligation. In the event of default of sovereign debt, the Fund may be unable to pursue legal action against the sovereign issuer or to realize on collateral securing the debt.

Fluctuation of Net Asset Value, Share Premiums and Discounts Risk:

As with all exchange-traded funds, Fund Shares may be bought and sold in the secondary market at market prices. The trading prices of Fund Shares in the secondary market may differ from the Fund's daily net asset value per share and there may be times when the market price of the shares is more than the net asset value per share (premium) or less than the net asset value per share (discount). This risk is heightened in times of market volatility or periods of steep market declines.

Below Investment-Grade Securities Risk:

Lower-quality debt securities (“high yield” or “junk” bonds) are considered predominantly speculative, and can involve a substantially greater risk of default than higher quality debt securities. Issuers of lower-quality debt securities may have substantially greater risk of insolvency or bankruptcy than issuers of higher-quality debt securities. They can be illiquid, and their values can have significant volatility and may decline significantly over short periods of time. Lower-quality debt securities tend to be more sensitive to adverse news about the issuer, or the market or economy in general.

Counterparty Risk:

The Fund will be subject to credit risk with respect to the counterparties with which the Fund enters into derivatives contracts, repurchase agreements, reverse repurchase agreements, and other transactions. If a counterparty fails to meet its contractual obligations, the Fund may be unable to terminate or realize any gain on the investment or transaction, or to recover collateral posted to the counterparty, resulting in a loss to the Fund.

If the Fund holds collateral posted by its counterparty, it may be delayed or prevented from realizing on the collateral in the event of a bankruptcy or insolvency proceeding relating to the counterparty.

Currency Risk:

The value of the Fund's assets may be affected favorably or unfavorably by currency exchange rates, currency exchange control regulations, and delays, restrictions or prohibitions on the repatriation of foreign currencies. Foreign currency exchange rates may have significant volatility, and changes in the values of foreign currencies against the U.S. dollar may result in substantial declines in the values of the Fund's assets denominated in foreign currencies.

Derivatives Risk:

Derivative transactions can create investment leverage and may have significant volatility. It is possible that a derivative transaction will result in a much greater loss than the principal amount invested, and the Fund may not be able to close out a derivative transaction at a favorable time or price. The counterparty to a derivatives contract may be unable or unwilling to make timely settlement payments, return the Fund's margin, or otherwise honor its obligations. A derivatives transaction may not behave in the manner anticipated by the Adviser or may not have the effect on the Fund anticipated by the Adviser.

Emerging Markets Risk:

Risks of investing in emerging markets include, among others, greater political and economic instability, greater volatility in currency exchange rates, less developed securities markets, possible trade barriers, currency transfer restrictions, a more limited number of potential buyers and issuers, an emerging market country's dependence on revenue from particular commodities or international aid, less governmental supervision and regulation, unavailability of currency hedging techniques, differences in auditing and financial reporting standards, and less developed legal systems. There is also the potential for unfavorable action such as expropriation, nationalization, embargo, and acts of war. The securities of emerging market companies may trade less frequently and in smaller volumes than more widely held securities. Market disruptions or substantial market corrections may limit very significantly the liquidity of securities of certain companies in a particular country or geographic region, or of all companies in the country or region. The Fund may be unable to liquidate its positions in such securities at any time, or at a favorable price, in order to meet the Fund's obligations. These risks are generally greater for investments in frontier market countries, which typically have smaller economies or less developed capital markets than traditional emerging market countries.

Geographic Focus Risk:

The performance of a fund that is less diversified across countries or geographic regions will be closely tied to market, currency, economic, political, environmental, or regulatory conditions and developments in the countries or regions in which the fund invests, and may be more volatile than the performance of a more geographically-diversified fund.

Europe:

Developed and emerging market countries in Europe will be significantly affected by the fiscal and monetary controls of the Economic and Monetary Union of the European Union (“EU”). Changes in regulations on trade, decreasing imports or exports, changes in the exchange rate of the euro and recessions among European countries may have a significant adverse effect on the economies of other European countries. In addition, one or more countries may abandon the euro and/or withdraw from the EU. For example, on January 31, 2020, the United Kingdom formally withdrew from the EU (commonly referred to as “Brexit”) and entered an 11-month transition period during which the United Kingdom remained part of the EU single market and customs union, the laws of which governed the economic, trade, and security relations between the United Kingdom and EU. The transition period concluded on December 31, 2020, and the United Kingdom left the EU single market and customs union under the terms of a new trade agreement. The agreement governs the new relationship between the United Kingdom and EU with respect to trading goods and services, but critical aspects of the relationship remain unresolved and subject to further negotiation and agreement. The full scope and nature of the consequences of the exit are not at this time known and are unlikely to be known for a significant period of time. It is also unknown whether the United Kingdom's exit will increase the likelihood of other countries also departing the EU. Any exits from the EU, or the possibility of such exits, may have a significant impact on the United Kingdom, Europe, and global economies, which may result in increased volatility and illiquidity, new legal and regulatory uncertainties and potentially lower economic growth for such economies that could potentially have an adverse effect on the value of the Fund's investments. In addition, a number of countries in Europe have suffered terrorist attacks and additional attacks may occur in the future. Such attacks may cause uncertainty in financial markets and may adversely affect the performance of the issuers to which the Fund has exposure.

United Kingdom:

The United Kingdom has one of the largest economies in Europe, and the United States and other European countries are substantial trading partners of the United Kingdom. As a result, the British economy may be impacted by changes to the economic condition of the United States and other European countries. The British economy, along with certain other EU economies, experienced a significant economic

slowdown during the recent financial crisis, and certain British financial institutions suffered significant losses, were severely under-capitalized and required government intervention to survive. The British economy relies heavily on the export of financial services to the United States and other European countries and, therefore, a prolonged slowdown in the financial services sector may have a negative impact on the British economy. Continued governmental involvement or control in certain sectors may stifle competition in certain sectors or cause adverse effects on economic growth.

On January 31, 2020, the United Kingdom formally withdrew from the EU (commonly referred to as “Brexit”) and entered an 11-month transition period during which the United Kingdom remained part of the EU single market and customs union, the laws of which governed the economic, trade, and security relations between the United Kingdom and EU. The transition period concluded on December 31, 2020, and the United Kingdom left the EU single market and customs union under the terms of a new trade agreement. The agreement governs the new relationship between the United Kingdom and EU with respect to trading goods and services, but critical aspects of the relationship remain unresolved and subject to further negotiation and agreement. There is still considerable uncertainty relating to the potential consequences associated with the exit and whether the United Kingdom's exit will increase the likelihood of other countries also departing the EU. Any exits from the EU, or the possibility of such exits, may have a significant impact on the United Kingdom, Europe, and global economies, which may result in increased volatility and illiquidity, new legal and regulatory uncertainties and potentially lower economic growth for these economies that could potentially have an adverse effect on the value of the Fund's investments. In addition, the United Kingdom has been a target of terrorism in the past. Acts of terrorism in the United Kingdom or against British interests abroad may cause uncertainty in the British financial markets and adversely affect the performance of the issuers to which the Fund has exposure.

Income Risk:

The Fund's income may decline due to falling interest rates or other factors. Issuers of securities held by the Fund may call or redeem the securities during periods of falling interest rates, and the Fund would likely be required to reinvest in securities paying lower interest rates. If an obligation held by the Fund is prepaid, the Fund may have to reinvest the prepayment in other obligations paying income at lower rates.

Indexing Strategy/Index Tracking Risk:

The Fund is managed with an indexing investment strategy, attempting to track the performance of an unmanaged index of securities, regardless of the current or projected performance of the Index or of the actual securities comprising the Index. This differs from an actively-managed fund, which typically seeks to outperform a benchmark index. As a result, the Fund's performance may be less favorable than that of a portfolio managed using an active investment strategy. The structure and composition of the Index will affect the performance, volatility, and risk of the Index and, consequently, the performance, volatility, and risk of the Fund. When there are changes made to the component securities of the Index and the Fund in turn makes similar changes to its portfolio, any transaction costs and market exposure arising from such portfolio changes will be borne directly by the Fund and its shareholders. The Fund may recognize gains as a result of rebalancing or reconstituting its securities holdings to reflect changes in the securities included in the Index. The Fund also may be required to distribute any such gains to its shareholders to avoid adverse federal income tax consequences. While the Adviser seeks to track the performance of the Index (

i.e.

, achieve a high degree of correlation with the Index), the Fund's return may not match the return of the Index. The Fund incurs a number of operating expenses not applicable to the Index, and incurs costs in buying and selling securities. In addition, the Fund may not be fully invested at times, generally as a result of cash flows into or out of the Fund or reserves of cash held by the Fund to meet redemptions. The Adviser may attempt to track the Index return by investing in fewer than all of the securities in the Index, or in some securities not included in the Index, potentially increasing the risk of divergence between the Fund's return and that of the Index.

Liquidity Risk:

Lack of a ready market or restrictions on resale may limit the ability of the Fund to sell a security at an advantageous time or price or at all. Illiquid securities may trade at a discount from comparable, more liquid investments and may be subject to wide fluctuations in market value. Illiquidity of the Fund's holdings may limit the ability of the Fund to obtain cash to meet redemptions on a timely basis. In addition, the Fund, due to limitations on investments in any illiquid securities and/or the difficulty in purchasing and selling such investments, may be unable to achieve its desired level of exposure to a certain market or sector.

Non-Diversification Risk:

As a “non-diversified” fund, the Fund may hold a smaller number of portfolio securities than many other funds. To the extent the Fund invests in a relatively small number of issuers, a decline in the market value of a particular security held by the Fund may affect its value more than if it invested in a larger number of issuers. The value of Fund Shares may be more volatile than the values of shares of more diversified funds. The Fund may become diversified for periods of time solely as a result of tracking the Index (e.g., changes in weightings of one or more component securities).

Restricted Securities Risk:

The Fund may hold securities that have not been registered for sale to the public under the U.S. federal securities laws. There can be no assurance that a trading market will exist at any time for any particular restricted security. Limitations on the resale of these securities may have an adverse effect on their marketability, and may prevent the Fund from disposing of them promptly at reasonable prices. The Fund may have to bear the expense of registering the securities for resale and the risk of substantial delays in effecting the registration. Also, restricted securities may be difficult to value because market quotations may not be readily available, and the securities may have significant volatility.

Valuation Risk:

Some portfolio holdings, potentially a large portion of the Fund's investment portfolio, may be valued on the basis of factors other than market quotations. This may occur more often in times of market turmoil or reduced liquidity. There are multiple methods that can be used to value a portfolio holding when market quotations are not readily available. The value established for any portfolio holding at a point in time might differ from what would be produced using a different methodology or if it had been priced using market quotations. Portfolio holdings that are valued using techniques other than market quotations, including “fair valued” securities, may be subject to greater fluctuation in their valuations from one day to the next than if market quotations were used. In addition, there is no assurance that the Fund could sell or close out a portfolio position for the value established for it at any time, and it is possible that the Fund would incur a loss because a portfolio position is sold or closed out at a discount to the valuation established by the Fund at that time.

Risk Lose Money [Text]

rr_RiskLoseMoney

As with all investments, there are certain risks of investing in the Fund. Fund Shares will change in value, and you could lose money by investing in the Fund.

Risk Not Insured [Text]

rr_RiskNotInsured

An investment in the Fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.

Risk Nondiversified Status [Text]

rr_RiskNondiversifiedStatus

Non-Diversification Risk: As a “non-diversified” fund, the Fund may hold a smaller number of portfolio securities than many other funds. To the extent the Fund invests in a relatively small number of issuers, a decline in the market value of a particular security held by the Fund may affect its value more than if it invested in a larger number of issuers. The value of Fund Shares may be more volatile than the values of shares of more diversified funds. The Fund may become diversified for periods of time solely as a result of tracking the Index (e.g., changes in weightings of one or more component securities).

Bar Chart and Performance Table [Heading]

rr_BarChartAndPerformanceTableHeading

Fund Performance

Performance Narrative [Text Block]

rr_PerformanceNarrativeTextBlock

The following bar chart and table provide an indication of the risks of investing in the Fund by showing changes in the Fund's performance from year to year and by showing how the Fund's average annual returns for certain time periods compare with the average annual returns of the Index and of a relevant broad-based securities index. The Fund's past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. Updated performance information is available by calling 1-866-787-2257 or visiting our website at

https://www.ssga.com/spdrs

Performance Information Illustrates Variability of Returns [Text]

rr_PerformanceInformationIllustratesVariabilityOfReturns

Performance Availability Phone [Text]

rr_PerformanceAvailabilityPhone

1-866-787-2257

Performance Availability Website Address [Text]

rr_PerformanceAvailabilityWebSiteAddress

https://www.ssga.com/spdrs

Performance Past Does Not Indicate Future [Text]

rr_PerformancePastDoesNotIndicateFuture

The Fund's past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future.

Bar Chart [Heading]

rr_BarChartHeading

Annual Total Returns (years ended 12/31)

Bar Chart Closing [Text Block]

rr_BarChartClosingTextBlock

Highest Quarterly Return: 9.29% (Q4, 2020)
Lowest Quarterly Return: -11.23% (Q1, 2020)

Performance Table Heading

rr_PerformanceTableHeading

Average Annual Total Returns (for periods ended 12/31/20)

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 Fund Shares through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts.

Performance Table Explanation after Tax Higher

rr_PerformanceTableExplanationAfterTaxHigher

The returns after taxes can exceed the returns before taxes due to an assumed tax benefit for a shareholder from realizing a capital loss on a sale of Fund Shares.

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 Fund Shares through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. The returns after taxes can exceed the returns before taxes due to an assumed tax benefit for a shareholder from realizing a capital loss on a sale of Fund Shares. Effective February 12, 2016 (the “Benchmark Index Change Date”), the Fund's benchmark index changed from the DB Global Government ex-U.S. Inflation-Linked Bond Capped Index (the “Previous Benchmark Index”) to the FTSE International Inflation-Linked Securities Select Index, consistent with a change in the Fund's principal investment strategy to track the performance of the current index. Performance of the Fund prior to the Benchmark Index Change Date is therefore based on the Fund's investment strategy to track the Previous Benchmark Index.

SPDR(R) FTSE International Government Inflation-Protected Bond ETF | SPDR(R) FTSE International Government Inflation-Protected Bond ETF

Distribution and service (12b-1) fees

rr_RiskReturnAbstract

Management fees

rr_ManagementFeesOverAssets

0.50%

rr_DistributionAndService12b1FeesOverAssets

none

Other expenses

rr_OtherExpensesOverAssets

none

Total annual Fund operating expenses

rr_ExpensesOverAssets

0.50%

Year 1

rr_ExpenseExampleYear01

$ 51

Year 3

rr_ExpenseExampleYear03

160

Year 5

rr_ExpenseExampleYear05

280

Year 10

rr_ExpenseExampleYear10

$ 628

2011

rr_AnnualReturn2011

2.49%

2012

rr_AnnualReturn2012

14.01%

2013

rr_AnnualReturn2013

(4.82%)

2014

rr_AnnualReturn2014

(0.35%)

2015

rr_AnnualReturn2015

(10.43%)

2016

rr_AnnualReturn2016

5.15%

2017

rr_AnnualReturn2017

11.61%

2018

rr_AnnualReturn2018

(5.90%)

2019

rr_AnnualReturn2019

8.75%

2020

rr_AnnualReturn2020

7.76%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Highest Quarterly Return:

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Dec. 31, 2020

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

9.29%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Lowest Quarterly Return:

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Mar. 31, 2020

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(11.23%)

rr_AverageAnnualReturnYear01

7.76%

rr_AverageAnnualReturnYear05

5.29%

SPDR(R) FTSE International Government Inflation-Protected Bond ETF | Return After Taxes on Distributions | SPDR(R) FTSE International Government Inflation-Protected Bond ETF

rr_AverageAnnualReturnYear10

2.54%

rr_RiskReturnAbstract

rr_AverageAnnualReturnYear01

7.12%

rr_AverageAnnualReturnYear05

4.76%

SPDR(R) FTSE International Government Inflation-Protected Bond ETF | Return After Taxes on Distributions and Sale of Fund Shares | SPDR(R) FTSE International Government Inflation-Protected Bond ETF

rr_AverageAnnualReturnYear10

1.80%

rr_RiskReturnAbstract

rr_AverageAnnualReturnYear01

4.67%

rr_AverageAnnualReturnYear05

3.93%

SPDR(R) FTSE International Government Inflation-Protected Bond ETF | FTSE International Inflation-Linked Securities Select Index/DB Global Government ex-U.S. Inflation-Linked Bond Capped Index (reflects no deduction for fees, expenses or taxes)

rr_AverageAnnualReturnYear10

1.69%

rr_RiskReturnAbstract

rr_AverageAnnualReturnYear01

8.71%

^[1],[2]

rr_AverageAnnualReturnYear05

5.87%

^[1],[2]

SPDR(R) FTSE International Government Inflation-Protected Bond ETF | Bloomberg Barclays Global Aggregate Bond Index (reflects no deduction for fees, expenses or taxes)

rr_AverageAnnualReturnYear10

3.11%

^[1],[2]

rr_RiskReturnAbstract

rr_AverageAnnualReturnYear01

9.20%

rr_AverageAnnualReturnYear05

4.79%