Label	Element	Value
Risk/Return:	rr_RiskReturnAbstract
ProspectusDate	rr_ProspectusDate	Nov. 28, 2011
PACE Global Real Estate Securities Investments (Second Prospectus Summary) | PACE Global Real Estate Securities Investments
Risk/Return:	rr_RiskReturnAbstract
Risk/Return, Heading	rr_RiskReturnHeading	PACE Global Real Estate Securities Investments
Investment Objective, Heading	rr_ObjectiveHeading	Investment objective
investment Objective, Primary	rr_ObjectivePrimaryTextBlock	Total return.
Expense, Heading	rr_ExpenseHeading	Fees and expenses of the fund
Expense, Narrative	rr_ExpenseNarrativeTextBlock	These tables describe the fees and expenses that you may pay if you buy and hold 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 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 51% of the average value of its portfolio.
Portfolio Turnover, Rate	rr_PortfolioTurnoverRate	51.00%
Expense Example, Heading	rr_ExpenseExampleHeading	Example
Expense Example, Narrative	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 redeem all of your shares at the end of those periods. The example also assumes that your investment has a 5% return each year and that the fund's operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be:	[1]
Investment Strategy, Heading	rr_StrategyHeading	Principal strategies
Investment Strategy, Narrative	rr_StrategyNarrativeTextBlock	Principal investments The fund seeks to achieve its objective by investing primarily in real estate investment trusts ("REITs") and other real-estate related securities. Under normal market circumstances, the fund invests at least 80% of its net assets (plus the amount of any borrowing for investment purposes) in securities of companies in the real estate industry, which may include common shares, preferred shares, initial public offerings (IPOs) and units of beneficial interest in real estate companies (inclusive of REITs). The fund invests in such securities of companies with varying market capitalizations. The fund will consider real estate securities to be those securities issued by companies principally engaged in the real estate industry, defined to mean those companies which (1) derive at least 50% of their revenues from the ownership, operation, development, construction, financing, management or sale of commercial, industrial or residential real estate and similar activities, or (2) invest at least 50% of their assets in such real estate. The fund may invest in the securities of issuers located in a number of different countries throughout the world. Under normal market circumstances, the fund will maintain exposure to real estate related securities of issuers in the US and in at least three countries outside the US. The amount invested outside the US may vary, and at any given time, the fund may have a significant exposure to non-US securities depending upon an investment advisor's investment decisions. The fund may engage in "short-selling," where the fund will sell a security it does not own at the then-current market price and then borrow the security to deliver to the buyer. The fund is then obligated to buy the security on a later date so that it can return it to the lender. Short selling provides opportunities to increase the fund's total returns, but also entails significant potential risks. Management process UBS Global Asset Management (Americas) Inc. ("UBS Global AM"), the fund's manager, selects investment advisors for the fund, subject to approval of the fund's board. CBRE Clarion Securities, LLC (formerly, ING Clarion Real Estate Securities, LLC) ("CBRE Clarion") and Brookfield Investment Management Inc. ("Brookfield") currently serve as the fund's investment advisors. The relative value of each investment advisor's share of the fund's assets may change over time. CBRE Clarion uses a multi-step investment process for constructing the investment portfolio, combining top-down region and sector allocation with bottom-up individual stock selection. First, CBRE Clarion selects property sectors and geographic regions in which to invest and determines the degree of representation of such sectors and regions, through a systematic evaluation of public and private real estate market trends and conditions. Second, CBRE Clarion uses a proprietary valuation process in an effort to identify investments with superior current income and growth potential relative to their peers, which includes the analysis of several factors within three broad groupings: (1) value and property; (2) capital structure; and (3) management and strategy. Brookfield intends to achieve total returns by investing in a diversified portfolio of global securities of companies primarily in the real estate industry, including REITs, real estate operating companies and companies whose values are significantly affected by their real estate holdings. Brookfield utilizes a fundamental, bottom-up, value-based stock selection methodology, taking into account short-term considerations (such as temporary market mispricing) and long-term considerations (such as values of assets and cash flows).
Investment Strategy, Portfolio Concentration	rr_StrategyPortfolioConcentration	The fund seeks to achieve its objective by investing primarily in real estate investment trusts ("REITs") and other real-estate related securities.
Risk, Heading	rr_RiskHeading	Principal risks
Risk, Narrative	rr_RiskNarrativeTextBlock	All investments carry a certain amount of risk and the fund cannot guarantee that it will achieve its investment objective. You may lose money by investing in the fund. 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. The principal risks presented by an investment in the fund are: Real estate industry risk: An investment in the fund is subject to certain risks associated with the direct ownership of real estate and with the real estate industry in general, including possible declines in the value of real estate; risks related to general and local economic conditions; possible lack of availability of mortgage financing; variations in rental income, neighborhood values or the appeal of property to tenants; interest rates; overbuilding; extended vacancies of properties; increases in competition, property taxes and operating expenses; and changes in zoning laws. The values of securities of companies in the real estate industry, which is sensitive to economic downturns, may go through cycles of relative under-performance and out-performance in comparison to equity securities markets in general. Real estate investment trust risk: The performance of equity and mortgage REITs depends on how well each REIT manages its properties. Equity REITs, which invest directly in real estate properties and property developers, may be affected by any changes in the value of the underlying property owned by the trusts. Mortgage REITs, which specialize in lending money to developers of properties, may be affected by the quality of any credit extended. Equity risk: Stocks and other equity securities, and securities convertible into stocks, generally fluctuate in value more than bonds. The fund could lose all of its investment in a company's stock. Foreign investing risk: The value of the fund's investments in foreign securities may fall due to adverse political, social and economic developments abroad and due to decreases in foreign currency values relative to the US dollar. Investments in foreign government bonds involve special risks because the fund may have limited legal recourse in the event of default. Also, foreign securities are sometimes less liquid and more difficult to sell and to value than securities of US issuers. These risks are greater for investments in emerging market issuers. In addition, investments in emerging market issuers may decline in value because of unfavorable foreign government actions, greater risks of political instability or the absence of accurate information about emerging market issuers. Foreign currency risk: The value of non-US dollar denominated securities held by the fund may be affected by changes in exchange rates or control regulations. If a local currency gains against the US dollar, the value of the holding increases in US dollar terms. In addition, the fund may be exposed to losses if its other foreign currency positions (e.g., options, forward commitments) move against it. Illiquidity risk: The risk that investments cannot be readily sold at the desired time or price, and the fund may have to accept a lower price or may not be able to sell the security at all. An inability to sell securities can adversely affect the fund's value or prevent the fund from taking advantage of other investment opportunities. Short sales risk: There are certain unique risks associated with the use of short sales strategies. When selling a security short, an investment advisor will sell a security it does not own at the then-current market price and then borrow the security to deliver to the buyer. The fund is then obligated to buy the security on a later date so it can return the security to the lender. Short sales therefore involve the risk that the fund will incur a loss by subsequently buying a security at a higher price than the price at which the fund previously sold the security short. This would occur if the securities lender required the fund to deliver the securities the fund had borrowed at the commencement of the short sale and the fund was unable to either purchase the security at a favorable price or to borrow the security from another securities lender. If this occurs at a time when other short sellers of the security also want to close out their positions, a "short squeeze" can occur. A short squeeze occurs when demand is greater than supply for the security sold short. Moreover, because a fund's loss on a short sale arises from increases in the value of the security sold short, such loss, like the price of the security sold short, is theoretically unlimited. By contrast, a fund's loss on a long position arises from decreases in the value of the security and therefore is limited by the fact that a security's value cannot drop below zero. It is possible that the fund's securities held long will decline in value at the same time that the value of the securities sold short increases, thereby increasing the potential for loss. Limited capitalization risk: The risk that securities of smaller capitalization companies tend to be more volatile and less liquid than securities of larger capitalization companies. This can have a disproportionate effect on the market price of smaller capitalization companies and affect the fund's ability to purchase or sell these securities. In general, smaller capitalization companies are more vulnerable than larger companies to adverse business or economic developments and they may have more limited resources. Interest rate risk: An increase in prevailing interest rates typically causes the value of fixed income securities to fall. Changes in interest rates will likely affect the value of longer-duration fixed income securities more than shorter-duration securities and higher quality securities more than lower quality securities. When interest rates are falling, some fixed income securities provide that the issuer may repay them earlier than the maturity date, and if this occurs the fund may have to reinvest these repayments at lower interest rates. Market risk: The risk that the market value of the fund's investments may fluctuate, sometimes rapidly or unpredictably, as the stock and bond markets fluctuate. Market risk may affect a single issuer, industry, or sector of the economy, or it may affect the market as a whole. Non-diversification risk: The fund is a non-diversified investment company, which means that the fund may invest more of its assets in a smaller number of issuers than a diversified investment company. As a non-diversified fund, the fund's share price may be more volatile and the fund has a greater potential to realize losses upon the occurrence of adverse events affecting a particular issuer. Sector risk: Because the fund may invest a significant portion of its assets in the stocks of companies in particular economic sectors, economic changes adversely affecting such a sector may have more of an impact on the fund's performance than another fund having a broader range of investments. Foreign custody risk: The fund may hold foreign securities and cash with foreign banks, agents and securities depositories. Such foreign banks or securities depositories may be subject to limited regulatory oversight. The laws of certain countries also may limit the fund's ability to recover its assets if a foreign bank or depository enters into bankruptcy. Portfolio turnover risk: The fund may engage in frequent trading, which can result in high portfolio turnover. A high portfolio turnover rate involves greater expenses to the fund, including transaction costs, and is likely to generate more taxable short term gains for shareholders, which may have an adverse impact on performance. Initial public offerings risk: The purchase of shares issued in IPOs may expose the fund to the risks associated with issuers that have no operating history as public companies, as well as to the risks associated with the sectors of the market in which the issuer operates. The market for IPO shares may be volatile, and share prices of newly-public companies may fluctuate significantly over a short period of time. Management risk: The risk that the investment strategies, techniques and risk analyses employed by an investment advisor may not produce the desired results.
Risk, Lose Money	rr_RiskLoseMoney	You may lose money by investing in the fund.
Risk, Nondiversified Status	rr_RiskNondiversifiedStatus	The fund is a non-diversified investment company, which means that the fund may invest more of its assets in a smaller number of issuers than a diversified investment company. As a non-diversified fund, the fund's share price may be more volatile and the fund has a greater potential to realize losses upon the occurrence of adverse events affecting a particular issuer.
Risk, 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, Heading	rr_BarChartAndPerformanceTableHeading	Performance
Performance, Narrative	rr_PerformanceNarrativeTextBlock	Risk/return bar chart and table The performance information that follows shows the fund's performance information in a bar chart and an average annual total returns table. The bar chart does not reflect the maximum annual PACE Select Advisors Program fee; if it did, the total returns shown would be lower. The information provides some 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 total returns compare with those of a broad measure of market performance. The fund's past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future. This may be particularly true for the period prior to November 17, 2009, which is the date on which CBRE Clarion and Brookfield each assumed day-to-day management of a separate portion of the fund's assets. Prior to that, another investment advisor was responsible for managing the fund's assets. Updated performance for the fund is available at http://globalam- us.ubs.com/corpweb/performance.do. 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. In addition, the after-tax returns shown are not relevant to investors who hold fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts.
Performance, Information Illustrates Variability of Returns	rr_PerformanceInformationIllustratesVariabilityOfReturns	The performance information that follows shows the fund's performance information in a bar chart and an average annual total returns table.
Performance, Availability Website Address	rr_PerformanceAvailabilityWebSiteAddress	http://globalam- us.ubs.com/corpweb/performance.do
Performance, Past Does Not Indicate Future	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	PACE Global Real Estate Securities Investments Annual Total Returns of Class P Shares (2008 was Class P’s first full calendar year of operations)
Bar Chart, Does Not Reflect Sales Loads	rr_BarChartDoesNotReflectSalesLoads	The bar chart does not reflect the maximum annual PACE Select Advisors Program fee; if it did, the total returns shown would be lower.
Bar Chart, Closing	rr_BarChartClosingTextBlock	Total return January 1 - September 30, 2011: (13.30)% Best quarter during calendar years shown-2nd Q 2009: 25.93% Worst quarter during calendar years shown-4th Q 2008: (33.20)%
Index No Deduction for Fees, Expenses, Taxes	rr_IndexNoDeductionForFeesExpensesTaxes	Index 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. In addition, the after-tax returns shown are not relevant to investors who hold fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts.
Average Annual Returns, Caption	rr_AverageAnnualReturnCaption	Average annual total returns (for the periods ended December 31, 2010)
PACE Global Real Estate Securities Investments (Second Prospectus Summary) | PACE Global Real Estate Securities Investments | Class P
Risk/Return:	rr_RiskReturnAbstract
Fee Waiver or Reimbursement over Assets, Date of Termination	rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination	2012-11-28
Year to Date Return, Label	rr_YearToDateReturnLabel	Total return January 1 - September 30, 2011:
Bar Chart, Year to Date Return, Date	rr_BarChartYearToDateReturnDate	Sep. 30, 2011
Bar Chart, Year to Date Return	rr_BarChartYearToDateReturn	(13.30%)
Highest Quarterly Return, Label	rr_HighestQuarterlyReturnLabel	Best quarter during calendar years shown-2nd Q 2009:
Highest Quarterly Return, Date	rr_BarChartHighestQuarterlyReturnDate	Jun. 30, 2009
Highest Quarterly Return	rr_BarChartHighestQuarterlyReturn	25.93%
Lowest Quarterly Return, Label	rr_LowestQuarterlyReturnLabel	Worst quarter during calendar years shown-4th Q 2008:
Lowest Quarterly Return, Date	rr_BarChartLowestQuarterlyReturnDate	Dec. 31, 2008
Lowest Quarterly Return	rr_BarChartLowestQuarterlyReturn	(33.20%)
PACE Global Real Estate Securities Investments | FTSE EPRA/ NAREIT Developed Index
Risk/Return:	rr_RiskReturnAbstract
Average Annual Returns, Label	rr_AverageAnnualReturnLabel	FTSE EPRA/NAREIT Developed Index (Index reflects no deduction for fees, expenses or taxes.)
Average Annual Returns, 1 Year	rr_AverageAnnualReturnYear01	20.40%
Average Annual Returns, Since Inception	rr_AverageAnnualReturnSinceInception	(5.94%)
PACE Global Real Estate Securities Investments | Class P
Risk/Return:	rr_RiskReturnAbstract
Maximum front-end sales charge (load) imposed on purchases (as a % of the offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum deferred sales charge (load) (as a % of the offering price)	rr_MaximumDeferredSalesChargeOverOfferingPrice	none
Redemption fee (as a % of the amount redeemed within 90 days of purchase, if applicable)	rr_RedemptionFeeOverRedemption	(1.00%)
Maximum annual account fee for PACE Select Advisors Program (as a % of average value of shares held on the last calendar day of the previous quarter)	rr_MaximumAccountFeeOverAssets	2.00%
Management fees	rr_ManagementFeesOverAssets	0.70%
Distribution and/or service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	none
Other expenses (includes administration fee of 0.10%)	rr_OtherExpensesOverAssets	0.95%
Total annual fund operating expenses	rr_ExpensesOverAssets	1.65%
Management fee waiver/expense reimbursements	rr_FeeWaiverOrReimbursementOverAssets	(0.45%)	[2]
Total annual fund operating expenses after fee waiver and/or expense reimbursements	rr_NetExpensesOverAssets	1.20%	[2]
Expense Example, With Redemption, 1 Year	rr_ExpenseExampleYear01	323
Expense Example, With Redemption, 3 Years	rr_ExpenseExampleYear03	1,076
Expense Example, With Redemption, 5 Years	rr_ExpenseExampleYear05	1,850
Expense Example, With Redemption, 10 Years	rr_ExpenseExampleYear10	3,877
Annual Return 2008	rr_AnnualReturn2008	(49.44%)
Annual Return 2009	rr_AnnualReturn2009	27.88%
Annual Return 2010	rr_AnnualReturn2010	16.27%
Average Annual Returns, Label	rr_AverageAnnualReturnLabel	Class P Return before taxes
Average Annual Returns, 1 Year	rr_AverageAnnualReturnYear01	13.97%
Average Annual Returns, Since Inception	rr_AverageAnnualReturnSinceInception	(11.00%)
Average Annual Returns, Inception Date	rr_AverageAnnualReturnInceptionDate	Jan. 22, 2007
PACE Global Real Estate Securities Investments | Class P | After Taxes on Distributions
Risk/Return:	rr_RiskReturnAbstract
Average Annual Returns, Label	rr_AverageAnnualReturnLabel	Class P Return after taxes on distributions
Average Annual Returns, 1 Year	rr_AverageAnnualReturnYear01	11.22%
Average Annual Returns, Since Inception	rr_AverageAnnualReturnSinceInception	(12.67%)
Average Annual Returns, Inception Date	rr_AverageAnnualReturnInceptionDate	Jan. 22, 2007
PACE Global Real Estate Securities Investments | Class P | After Taxes on Distributions and Sales
Risk/Return:	rr_RiskReturnAbstract
Average Annual Returns, Label	rr_AverageAnnualReturnLabel	Class P Return after taxes on distributions and sale of fund shares
Average Annual Returns, 1 Year	rr_AverageAnnualReturnYear01	9.02%
Average Annual Returns, Since Inception	rr_AverageAnnualReturnSinceInception	(9.99%)
Average Annual Returns, Inception Date	rr_AverageAnnualReturnInceptionDate	Jan. 22, 2007

[1] Except that the expenses reflect the effects of the fund's fee waiver/expense reimbursement agreement for the first year only.

[2] The fund and UBS Global Asset Management (Americas) Inc. ("UBS Global AM") have entered into a written fee waiver/expense reimbursement agreement pursuant to which UBS Global AM is contractually obligated to waive its management fees and/or reimburse expenses so that the fund's ordinary total operating expenses through November 28, 2012 (excluding dividend expense, borrowing costs, and interest expense relating to short sales, and expenses attributable to investment in other investment companies, interest, taxes, brokerage commissions and extraordinary expenses) would not exceed 1.20%. The fund has agreed to repay UBS Global AM for any waived fees/reimbursed expenses to the extent that it can do so over the following three fiscal years without causing the fund's expenses in any of those three years to exceed this expense cap. The fee waiver/expense reimbursement agreement may be terminated by the fund's board at any time and also will terminate automatically upon the expiration or termination of the fund's advisory contract with UBS Global AM. Upon termination of the agreement, however, UBS Global AM's three year recoupment rights will survive.