Label	Element	Value
Risk Return [Abstract]	rr_RiskReturnAbstract
ProspectusDate	rr_ProspectusDate	Nov. 28, 2012
PACE International Emerging Markets Equity Investments (Second Prospectus Summary) | PACE International Emerging Markets Equity Investments
Risk Return [Abstract]	rr_RiskReturnAbstract
Risk/Return [Heading]	rr_RiskReturnHeading	PACE International Emerging Markets Equity Investments
Objective [Heading]	rr_ObjectiveHeading	Investment objective
Objective, Primary [Text Block]	rr_ObjectivePrimaryTextBlock	Capital appreciation.
Expense [Heading]	rr_ExpenseHeading	Fees and expenses of the fund
Expense Narrative [Text Block]	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 [Text]	rr_ShareholderFeesCaption	Shareholder fees (fees paid directly from your investment)
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 30% of the average value of its portfolio.
Portfolio Turnover, Rate	rr_PortfolioTurnoverRate	30.00%
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 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:
Strategy [Heading]	rr_StrategyHeading	Principal strategies
Strategy Narrative [Text Block]	rr_StrategyNarrativeTextBlock	Principal investments Under normal circumstances, the fund invests at least 80% of its net assets (plus the amount of any borrowing for investment purposes) in equity securities that are tied economically to emerging market countries, which may include equity securities issued by companies domiciled in emerging market countries. The fund generally defines emerging market countries as countries that are not included in the MSCI World Index of major world economies. However, countries included in this index may be considered emerging markets based on current political and economic factors. The fund may not always diversify its investments on a geographic basis among emerging market countries. The fund may from time to time invest a significant portion of its assets in the stocks of companies in various economic sectors, such as financials or technology. The fund may invest, to a limited extent, in (1) bonds, including up to 10% of its total assets in bonds that are below investment grade, which are commonly known as "junk bonds," and (2) securities of other investment companies that invest in emerging markets.    Management process The fund employs a "manager of managers" structure. UBS Global Asset Management (Americas) Inc. ("UBS Global AM"), the fund's manager and primary provider of investment advisory services, has the ultimate authority, subject to oversight by the fund's board, to oversee the fund's investment advisor(s) and recommend their hiring, termination and replacement. Mondrian Investment Partners Limited ("Mondrian"), William Blair & Company, L.L.C. ("William Blair") and Lee Munder Capital Group, LLC ("Lee Munder") 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. Mondrian conducts research on a global basis in an effort to identify securities that have the potential for capital appreciation over a market cycle, using (1) a value-oriented dividend discount methodology toward individual securities and (2) market analysis that attempts to identify value across country boundaries. This approach focuses on future anticipated dividends and their current discounted worth, and then compares the values of different possible investments. Currency returns can be an integral component of an investment's total return, and Mondrian uses a purchasing power parity approach to assess the value of individual currencies. Purchasing power parity attempts to identify the amount of goods and services that a dollar will buy in the US and compares that to the amount of a foreign currency required to buy the same amount of goods and services in another country. William Blair invests in a portfolio of mid cap and large cap equity securities issued by companies in emerging markets worldwide, according to a quality growth philosophy. William Blair's primary focus is on identifying such companies whose growth characteristics (rate and durability) are underestimated by the market and supported by quality management and strong competitive positioning. After screening the universe of emerging country issuers for certain quality, growth and liquidity characteristics to create a prospective list of investible securities, William Blair undertakes detailed fundamental analysis of these companies, focusing attention on areas where short- to intermediate-term earnings trends and overall operating performance are improving or are strong. Key considerations are the sustainability of a company's competitive advantage relative to peers, its industry and market conditions, a sound financial structure and high reinvestment rates that combine to create favorable conditions for prospective growth. William Blair normally invests on a relatively concentrated basis, with the number of holdings ranging between 50-80 securities. To a lesser extent, William Blair also takes into account country selection and industry sector allocation. Normally, William Blair's investments will be allocated among at least six different countries, and no more than 50% of its segment of the fund may be invested in securities of issuers in any one country at any given time. William Blair may obtain exposure to emerging markets equity securities through limited investments in investment company securities, such as exchange-traded funds ("ETFs"). Lee Munder uses a bottom-up quantitative approach to investing in emerging markets equity securities. Inefficiencies in the market create opportunities, and Lee Munder believes that a quantitative process, which relies on sophisticated mathematical or statistical models in selecting investments, is well-suited to capture these inefficiencies and provide an opportunity to outperform the market. Lee Munder's stock selection model groups factors used to select investments into three major categories: market dynamics, value and quality. Market dynamic factors are designed to exploit short term trends as Lee Munder believes investors under-react to certain developments in the short term; value factors are intended to capture mean reversion (i.e., a return to the average) as investors tend to overreact to certain developments in the longer term; and quality factors incorporate information about the quality of earnings that investors tend to overlook.
Risk [Heading]	rr_RiskHeading	Principal risks
Risk Narrative [Text Block]	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: 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. 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 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. Geographic concentration risk: To the extent the fund invests a significant portion of its assets in one geographic area, it will be more susceptible to factors adversely affecting that area. Credit risk: The risk that the fund could lose money if the issuer or guarantor of a fixed income security, or the counterparty to or guarantor of a derivative contract, is unable or unwilling to meet its financial obligations. This risk is likely greater for lower quality investments than for investments that are higher quality. 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. Moreover, changing market, economic and political conditions in one country or geographic region could adversely impact market, economic and political conditions in other countries or regions. Investment company risk: Investments in open- or closed-end investment companies involve certain risks. The shares of other investment companies are subject to the management fees and other expenses of those companies, and the purchase of shares of some investment companies requires the payment of sales loads and (in the case of closed-end investment companies)sometimes substantial premiums above the value of such companies' portfolio securities. 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. 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. Management risk: The risk that the investment strategies, techniques and risk analyses employed by an investment advisor may not produce the desired results. An investment advisor for the fund employs a complex strategy using proprietary quantitative models in selecting investments for the fund. Investments selected using these models may perform differently than expected as a result of the factors used in the models, the weight placed on each factor, changes from the factors' historical trends, and technical issues in the construction and implementation of the models (including, for example, data problems, software issues, or other types of errors). There is no guarantee that the investment advisor's quantitative models will perform as expected or result in effective investment decisions for the fund.
Risk Lose Money [Text]	rr_RiskLoseMoney	You may lose money by investing in the fund.
Risk Not Insured Depository Institution [Text]	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 [Text Block]	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 given that other investment advisors were responsible for managing portions of the fund's assets during previous periods. Mondrian assumed day-to-day management of a portion of the fund's assets on September 28, 2004. William Blair assumed day-to-day management of a separate portion of the fund's assets on March 23, 2011. Lee Munder assumed day-to-day management of a separate portion of the fund's assets on October 16, 2012. 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 [Text]	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 [Text]	rr_PerformanceAvailabilityWebSiteAddress	http://globalam-us.ubs.com/corpweb/performance.do
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	PACE International Emerging Markets Equity Investments Annual Total Returns of Class P Shares
Bar Chart Does Not Reflect Sales Loads [Text]	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 [Text Block]	rr_BarChartClosingTextBlock	Total return January 1 - September 30, 2012: 11.48%             Best quarter during calendar years shown--2Q 2009: 31.65%         Worst quarter during calendar years shown--4Q 2008: (28.35)%
Index No Deduction for Fees, Expenses, Taxes [Text]	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.
Caption	rr_AverageAnnualReturnCaption	Average annual total returns (for the periods ended December 31, 2011)
PACE International Emerging Markets Equity Investments (Second Prospectus Summary) | PACE International Emerging Markets Equity Investments | MSCI Emerging Markets Index
Risk Return [Abstract]	rr_RiskReturnAbstract
Label	rr_AverageAnnualReturnLabel	MSCI Emerging Markets Index (Index reflects no deduction for fees, expenses or taxes.)
1 Year	rr_AverageAnnualReturnYear01	(18.17%)
5 Years	rr_AverageAnnualReturnYear05	2.70%
10 Years	rr_AverageAnnualReturnYear10	14.20%
PACE International Emerging Markets Equity Investments (Second Prospectus Summary) | PACE International Emerging Markets Equity Investments | Class P
Risk Return [Abstract]	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	1.00%
Distribution and/or service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	none
Other expenses (includes administration fee of 0.10%)	rr_OtherExpensesOverAssets	0.88%
Total annual fund operating expenses	rr_ExpensesOverAssets	1.88%
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	390
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	1,184
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	1,995
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	4,104
Annual Return 2002	rr_AnnualReturn2002	(13.70%)
Annual Return 2003	rr_AnnualReturn2003	54.99%
Annual Return 2004	rr_AnnualReturn2004	19.53%
Annual Return 2005	rr_AnnualReturn2005	28.91%
Annual Return 2006	rr_AnnualReturn2006	30.72%
Annual Return 2007	rr_AnnualReturn2007	35.35%
Annual Return 2008	rr_AnnualReturn2008	(51.83%)
Annual Return 2009	rr_AnnualReturn2009	64.12%
Annual Return 2010	rr_AnnualReturn2010	18.03%
Annual Return 2011	rr_AnnualReturn2011	(17.94%)
Year to Date Return, Label	rr_YearToDateReturnLabel	Total return January 1 - September 30, 2012:
Bar Chart, Year to Date Return, Date	rr_BarChartYearToDateReturnDate	Sep. 30, 2012
Bar Chart, Year to Date Return	rr_BarChartYearToDateReturn	11.48%
Highest Quarterly Return, Label	rr_HighestQuarterlyReturnLabel	Best quarter during calendar years shown-2Q 2009:
Highest Quarterly Return, Date	rr_BarChartHighestQuarterlyReturnDate	Jun. 30, 2009
Highest Quarterly Return	rr_BarChartHighestQuarterlyReturn	31.65%
Lowest Quarterly Return, Label	rr_LowestQuarterlyReturnLabel	Worst quarter during calendar years shown-4Q 2008:
Lowest Quarterly Return, Date	rr_BarChartLowestQuarterlyReturnDate	Dec. 31, 2008
Lowest Quarterly Return	rr_BarChartLowestQuarterlyReturn	(28.35%)
Label	rr_AverageAnnualReturnLabel	Class P Return before taxes
1 Year	rr_AverageAnnualReturnYear01	(19.57%)
5 Years	rr_AverageAnnualReturnYear05	(1.28%)
10 Years	rr_AverageAnnualReturnYear10	8.62%
Inception Date	rr_AverageAnnualReturnInceptionDate	Aug. 24, 1995
PACE International Emerging Markets Equity Investments (Second Prospectus Summary) | PACE International Emerging Markets Equity Investments | Class P | After Taxes on Distributions
Risk Return [Abstract]	rr_RiskReturnAbstract
Label	rr_AverageAnnualReturnLabel	Class P Return after taxes on distributions
1 Year	rr_AverageAnnualReturnYear01	(19.59%)
5 Years	rr_AverageAnnualReturnYear05	(2.79%)
10 Years	rr_AverageAnnualReturnYear10	7.51%
Inception Date	rr_AverageAnnualReturnInceptionDate	Aug. 24, 1995
PACE International Emerging Markets Equity Investments (Second Prospectus Summary) | PACE International Emerging Markets Equity Investments | Class P | After Taxes on Distributions and Sales
Risk Return [Abstract]	rr_RiskReturnAbstract
Label	rr_AverageAnnualReturnLabel	Class P Return after taxes on distributions and sale of fund shares
1 Year	rr_AverageAnnualReturnYear01	(12.14%)
5 Years	rr_AverageAnnualReturnYear05	(1.20%)
10 Years	rr_AverageAnnualReturnYear10	7.56%
Inception Date	rr_AverageAnnualReturnInceptionDate	Aug. 24, 1995