485BPOS

As filed with the Securities and Exchange Commission on April 9, 2014

1933 Act Registration No. 33-87254

1940 Act Registration No. 811-08764

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM N-lA

REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933	x
Pre-Effective Amendment No.	o

Post-Effective Amendment No. 42 x

and/or
REGISTRATION STATEMENT UNDER THE INVESTMENT COMPANY ACT OF 1940	x

Amendment No. 44 x

(Check appropriate box or boxes.)

PACE® SELECT ADVISORS TRUST

(Exact Name of Registrant as Specified in Charter)

1285 Avenue of the Americas

New York, New York 10019-6028

(Address of Principal Executive Offices)

Registrant’s Telephone Number, including Area Code: (212) 882-3000

MARK F. KEMPER, ESQ.

UBS Global Asset Management (US) Inc.

1285 Avenue of the Americas

New York, New York 10019-6028

(Name and Address of Agent for Service)

Copies to:

JACK W. MURPHY, ESQ.
Dechert LLP
1900 K Street, N.W.

Washington, D.C. 20006-2401
Telephone: (202) 261-3300

Approximate Date of Proposed Public Offering:  Effective Date of this Post-Effective Amendment.

It is proposed that this filing will become effective (check appropriate box):

ximmediately upon filing pursuant to paragraph (b)

oon (date) pursuant to paragraph (b)

o60 days after filing pursuant to paragraph (a)(1)

oon (date) pursuant to paragraph (a)(1)

o75 days after filing pursuant to paragraph (a)(2)

oon (date) pursuant to paragraph (a)(2) of rule 485.

If appropriate, check the following box:

othis post-effective amendment designates a new effective date for a previously filed post-effective amendment.

Title of Securities Being Registered: Shares of Beneficial Interest of PACE Select Advisors Trust

SIGNATURES

Pursuant to the requirements of the Securities Act of 1933 and the Investment Company Act of 1940, the Registrant certifies that it meets all the requirements for effectiveness of this Post-Effective Amendment to its Registration Statement under Rule 485(b) under the Securities Act of 1933 and has duly caused this Post-Effective Amendment No. 42 to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of New York and State of New York, on the 9th day of April, 2014.

PACE SELECT ADVISORS TRUST
By:	/s/ Christopher S. Ha
	Christopher S. Ha
	Vice President and Assistant Secretary

Pursuant to the requirements of the Securities Act of 1933, this Post-Effective Amendment has been signed below by the following persons in the capacities and on the dates indicated:

SIGNATURE	TITLE	DATE
/s/ Richard Q. Armstrong	Trustee and Chairman of the Board of Trustees	April 9, 2014
Richard Q. Armstrong*
/s/ Alan S. Bernikow	Trustee	April 9, 2014
Alan S. Bernikow*
/s/ Richard R. Burt	Trustee	April 9, 2014
Richard R. Burt*
/s/ Mark E. Carver	President	April 9, 2014
Mark E. Carver*
/s/ Thomas Disbrow	Vice President and Treasurer	April 9, 2014
Thomas Disbrow
/s/ Meyer Feldberg	Trustee	April 9, 2014
Meyer Feldberg*
/s/ Bernard H. Garil	Trustee	April 9, 2014
Bernard H. Garil*
/s/ Heather R. Higgins	Trustee	April 9, 2014
Heather R. Higgins*

*Signatures affixed by Lisa Price pursuant to Powers of Attorney dated November 22, 2010 and incorporated by reference from Post-Effective Amendment No. 31 to the Registrant’s registration statement, SEC File No. 33-87254, filed November 26, 2010.

EXHIBIT INDEX

Index No.	Description of Exhibit
EX-101.INS	XBRL Instance Document
EX-101.SCH	XBRL Taxonomy Extension Schema Document
EX-101.CAL	XBRL Taxonomy Extension Calculation Linkbase
EX-101.DEF	XBRL Taxonomy Extension Definition Linkbase
EX-101.LAB	XBRL Taxonomy Extension Labels Linkbase
EX-101.PRE	XBRL Taxonomy Extension Presentation Linkbase

XML

Class P Prospectus | PACE® Municipal Fixed Income Investments | Class P

PACE® Municipal Fixed Income Investments

Investment objective

High current income exempt from federal income tax.

Fees and expenses of the fund

These tables describe the fees and expenses that you may pay if you buy and hold shares of the fund.

Shareholder fees (fees paid directly from your investment)

Shareholder Fees	Class P Prospectus PACE® Municipal Fixed Income Investments Class P
Maximum front-end sales charge (load) imposed on purchases (as a % of the offering price)	none
Maximum deferred sales charge (load) (as a % of the offering price)	none
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)	2.00%
Redemption fee (as a % of the amount redeemed within 90 days of purchase, if applicable)	1.00%

Annual fund operating expenses (expenses that you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses		Class P Prospectus PACE® Municipal Fixed Income Investments Class P
Management fees		0.44%
Distribution and/or service (12b-1) fees		none
Other expenses (includes administration fee of 0.10%)		0.26%
Total annual fund operating expenses		0.70%
Management fee waiver/expense reimbursements	[1]	0.05%
Total annual fund operating expenses after fee waiver and/or expense reimbursements	[1]	0.65%

Example

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:

Expense Example (USD $)		1 year	3 years	5 years	10 years
Class P Prospectus PACE® Municipal Fixed Income Investments Class P	[1]	268	834	1,425	3,028

Portfolio turnover

The fund pays transaction costs, such as commissions or dealer spreads, 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 69% of the average value of its portfolio.

Principal strategies

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 municipal fixed income investments, the income from which is exempt from regular federal income taxes. The fund invests principally in investment grade municipal bonds of varying maturities. Normally, the fund limits its investments in municipal bonds that are subject to the federal alternative minimum tax ("AMT") so that not more than 25% of its interest income will be subject to the AMT, and invests in these bonds when its investment advisor believes that they offer attractive yields relative to similar municipal bonds that are not subject to the AMT.

The fund normally limits its portfolio "duration" to between three and seven years. Duration is a measure of the fund's exposure to interest rate risk—a longer duration means that changes in market interest rates are likely to have a larger effect on the value of the fund's portfolio.

The fund may invest up to 50% of its total assets in municipal bonds that are secured by revenues from public housing authorities and state and local housing finance authorities, including bonds that are secured or backed by the US Treasury or other US government guaranteed securities. There are different types of US government securities, including those issued or guaranteed by the US government, its agencies and its instrumentalities, and they have different types of government support. Some are supported by the full faith and credit of the US, while others are supported by (1) the ability of the issuer to borrow from the US Treasury; (2) the credit of the issuing agency, instrumentality or government-sponsored entity; (3) pools of assets, such as mortgages; or (4) the US government in some other way.

The fund limits its investments in municipal bonds with the lowest investment grade rating (or unrated bonds of equivalent quality) to 15% of its total assets at the time the bonds are purchased.

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. Standish Mellon Asset Management Company LLC ("Standish") currently serves as the fund's investment advisor. In deciding which securities to buy for the fund, Standish seeks to identify undervalued sectors or geographical regions of the municipal market or undervalued individual securities, by using credit research and valuation analysis and monitoring the relationship of the municipal yield curve to the treasury yield curve. Standish also uses credit quality assessments from its in-house analysts to identify potential rating changes, undervalued issues and macro trends with regard to market sectors and geographical regions. Standish may make modest duration adjustments based on economic analyses and interest rate forecasts. Standish generally sells securities (1) if it identifies more attractive investment opportunities within its investment criteria; (2) with weakening credit profiles; or (3) to adjust the average duration of the fund's portfolio.

Principal risks

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:

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.

Municipal securities risk: Municipal securities are subject to interest rate and credit risks. The ability of a municipal issuer to make payments and the value of municipal securities can be affected by uncertainties in the municipal securities market. Such uncertainties could cause increased volatility in the municipal securities market and could negatively impact the fund's net asset value and/or the distributions paid by the fund. Municipal bonds secured by revenues from public housing authorities may be subject to additional uncertainties relating to the possibility that proceeds may exceed supply of available mortgages to be purchased by public housing authorities, resulting in early retirement of bonds, or that homeowner repayments will create an irregular cash flow. Municipalities continue to experience difficulties in the current economic and political environment.

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.

Related securities concentration risk: Because the fund may invest more than 25% of its total assets in municipal bonds that are issued to finance similar projects, changes that affect one type of municipal bond may have a significant impact on the value of the fund.

US Government securities risk: There are different types of US government securities with different levels of credit risk, including the risk of default, depending on the nature of the particular government support for that security. For example, a US government-sponsored entity, such as Federal National Mortgage Association ("Fannie Mae") or Federal Home Loan Mortgage Corporation ("Freddie Mac"), although chartered or sponsored by an Act of Congress, may issue securities that are neither insured nor guaranteed by the US Treasury and are therefore riskier than those that are.

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.

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.

Management risk: The risk that the investment strategies, techniques and risk analyses employed by the investment advisor may not produce the desired results.

Performance

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. 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.

PACE Municipal Fixed Income Investments Annual Total Returns of Class P Shares

Best quarter during calendar years shown—3Q 2009: 6.13%
Worst quarter during calendar years shown—4Q 2010: (3.13)%

Average annual total returns (figures reflect 2% PACE Select Advisors Program Fee) (for the periods ended December 31, 2013)

Average Annual Returns Class P Prospectus PACE® Municipal Fixed Income Investments	Average Annual Returns, 1 Year	Average Annual Returns, 5 Years	Average Annual Returns, 10 Years	Average Annual Returns, Inception Date
Class P	(3.57%)	2.89%	1.40%	Aug. 24, 1995
Class P After Taxes on Distributions	(3.75%)	2.84%	1.38%
Class P After Taxes on Distributions and Sale of Fund Shares	(0.73%)	2.99%	1.81%
Class P Barclays US Municipal 3-15 Year Blend Index (Index reflects no deduction for fees, expenses or taxes.)	(1.24%)	5.15%	4.26%

[1] 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 March 31, 2015 (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 0.65%. 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.

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

XML

Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

PACE® Large Co Growth 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)

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 lesser of the offering price or the redemption price)

rr_MaximumDeferredSalesChargeOverOther

none

Redemption Fee (as a percentage of Amount Redeemed)

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%

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)

Management fees

rr_ManagementFeesOverAssets

0.68%

Distribution and/or service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

none

Other expenses (includes administration fee of 0.10%)

rr_OtherExpensesOverAssets

0.27%

Total annual fund operating expenses

rr_ExpensesOverAssets

0.95%

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 76% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

76.00%

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:

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 298

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

913

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

1,552

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 3,271

Strategy [Heading]

rr_StrategyHeading

Principal strategies

Strategy Narrative [Text Block]

rr_StrategyNarrativeTextBlock

Principal investments

The fund invests primarily in stocks of companies that are believed to have substantial potential for capital growth. 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 issued by large capitalization companies. As of the date of this prospectus, large capitalization companies means companies with a total market capitalization of $3.0 billion or greater at the time of purchase. Effective April 28, 2014, large capitalization companies means companies with a total market capitalization within the market capitalization range of the companies in the Russell 1000^® Growth Index at the time of purchase. Dividend income is an incidental consideration in the investment advisors' selection of stocks for the fund.

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 healthcare or technology. The fund may also invest, to a lesser extent, in other securities such as securities convertible into stocks, fixed income securities, initial public offerings ("IPOs") and stocks of companies with smaller total market capitalizations. The fund may invest up to 20% of its total assets in non-US securities, which may trade either within or outside the US.

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. Delaware Investments Fund Advisers ("Delaware"), Roxbury Capital Management, LLC ("Roxbury") and J.P. Morgan Investment Management Inc. ("J.P. Morgan") 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.

Delaware invests primarily in common stocks of large capitalization growth-oriented companies that Delaware believes have long-term capital appreciation potential and are expected to grow faster than the US economy. It uses a bottom-up approach, seeking companies that have large-end market potential, dominant business models and strong free cash flow generation that are attractively priced compared to the intrinsic value of the securities. Delaware tends to hold a relatively focused portfolio with a limited number of stocks.

Roxbury's strategy employs a bottom-up approach to stock selection, seeking high quality growth companies whose stocks are trading at discounts to fair value. Roxbury looks for companies with sustainable competitive advantages and opportunities to grow and reinvest capital at higher rates than their cost of capital, as well as companies with management teams with a proven ability to maximize shareholder value. Roxbury evaluates companies as private entities to determine their intrinsic worth and uses scenario analysis to determine a "margin of safety," or discount to intrinsic value, as a means of protecting capital. Roxbury typically sells a stock if (1) the market price exceeds Roxbury's estimate of intrinsic value; (2) the company's fundamentals fall short of Roxbury's investment thesis; or (3) when there are more attractive investment alternatives. Roxbury may invest in a limited number of stocks that it believes have attractive risk-reward profiles, and this may also result in significant weights in a sector.

J.P. Morgan invests primarily in a focused portfolio of equity securities of large capitalization companies. Although J.P. Morgan will invest primarily in equity securities of U.S. companies, it may invest in foreign securities, including depositary receipts. In selecting investments, J.P. Morgan utilizes a combination of qualitative analysis and quantitative metrics in order to seek to achieve target returns which are higher than those of the fund's benchmark while attempting to maintain a moderate risk profile. J.P. Morgan employs a process that combines research, valuation and stock selection to identify companies that have a history of above-average growth or which it believes will achieve above-average growth in the future, and looks for companies with leading competitive positions, predictable and durable business models and management that can achieve sustained growth. J.P. Morgan may sell a security: due to a change in the company's fundamentals or a change in the original reason for purchase of an investment; if it no longer considers the security to be reasonably valued; or if it identifies a stock that it believes offers a better investment opportunity.

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.

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.

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.

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.

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.

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 [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. Delaware assumed responsibility for managing a separate portion of the fund's assets on December 5, 2007. Roxbury assumed responsibility for managing a separate portion of the fund's assets on May 25, 2010. J.P. Morgan assumed day-to-day management of a separate portion of the fund's assets on October 5, 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 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.

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 Large Co Growth 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.

Annual Return 2004

rr_AnnualReturn2004

8.84%

Annual Return 2005

rr_AnnualReturn2005

5.41%

Annual Return 2006

rr_AnnualReturn2006

9.47%

Annual Return 2007

rr_AnnualReturn2007

12.16%

Annual Return 2008

rr_AnnualReturn2008

(39.60%)

Annual Return 2009

rr_AnnualReturn2009

33.73%

Annual Return 2010

rr_AnnualReturn2010

16.52%

Annual Return 2011

rr_AnnualReturn2011

(1.02%)

Annual Return 2012

rr_AnnualReturn2012

14.55%

Annual Return 2013

rr_AnnualReturn2013

35.17%

Bar Chart Closing [Text Block]

rr_BarChartClosingTextBlock

Best quarter during calendar years shown—1Q 2012: 16.35%
Worst quarter during calendar years shown—4Q 2008: (21.35)%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Best quarter during calendar years shown

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Mar. 31, 2012

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

16.35%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Worst quarter during calendar years shown

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Dec. 31, 2008

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(21.35%)

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 (figures reflect 2% PACE Select Advisors Program Fee) (for the periods ended December 31, 2013)

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

32.49%

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

16.66%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

5.22%

Average Annual Returns, Inception Date

rr_AverageAnnualReturnInceptionDate

Aug. 24, 1995

After Taxes on Distributions

Risk/Return:

rr_RiskReturnAbstract

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

29.70%

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

16.11%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

4.91%

After Taxes on Distributions and Sale of Fund Shares

Risk/Return:

rr_RiskReturnAbstract

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

20.41%

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

13.48%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

4.17%

Russell 1000 Growth Index (Index reflects no deduction for fees, expenses or taxes.)

Risk/Return:

rr_RiskReturnAbstract

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

33.48%

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

20.39%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

7.83%

XML

Class P Prospectus | PACE® Mortgage-Backed Securities Fixed Income Investments | Class P

PACE® Mortgage-Backed Securities Fixed Income Investments

Investment objective

Current income.

Fees and expenses of the fund

These tables describe the fees and expenses that you may pay if you buy and hold shares of the fund.

Shareholder fees (fees paid directly from your investment)

Shareholder Fees	Class P Prospectus PACE® Mortgage-Backed Securities Fixed Income Investments Class P
Maximum front-end sales charge (load) imposed on purchases (as a % of the offering price)	none
Maximum deferred sales charge (load) (as a % of the offering price)	none
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)	2.00%
Redemption fee (as a % of the amount redeemed within 90 days of purchase, if applicable)	1.00%

Annual fund operating expenses (expenses that you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses		Class P Prospectus PACE® Mortgage-Backed Securities Fixed Income Investments Class P
Management fees		0.52%
Distribution and/or service (12b-1) fees		none
Other expenses (includes administration fee of 0.10%)		0.34%
Total annual fund operating expenses		0.86%
Management fee waiver/expense reimbursements	[1]	0.14%
Total annual fund operating expenses after fee waiver and/or expense reimbursements	[1]	0.72%

Example

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:

Expense Example (USD $)		1 year	3 years	5 years	10 years
Class P Prospectus PACE® Mortgage-Backed Securities Fixed Income Investments Class P	[1]	275	873	1,496	3,175

Portfolio turnover

The fund pays transaction costs, such as commissions or dealer spreads, 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 1,336% of the average value of its portfolio.

Principal strategies

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 a diversified portfolio of mortgage-related fixed income instruments, such as mortgage-backed securities (including mortgage pass- through securities and collateralized mortgage obligations ("CMOs"), commercial mortgage-backed securities, "to be announced" (or "TBA") securities and mortgage dollar rolls). The mortgage-backed securities in which the fund may invest include those issued or guaranteed by US government agencies or instrumentalities or private entities.

The fund also may invest in other types of investment grade fixed income instruments (or unrated bonds of equivalent quality).

TBA securities are mortgage-backed securities that usually are traded on a forward commitment basis with an approximate principal amount and no defined maturity date, issued or guaranteed by US government agencies and instrumentalities. The fund also may engage in TBA and Treasury "roll" transactions. A TBA roll transaction is a strategy whereby the investment advisor decides to sell one TBA security and buy another TBA security due at a later date (Treasury roll transactions differ in that the underlying securities are US Treasury securities). The fund also may invest in when-issued or delayed delivery bonds to increase its return, giving rise to a form of leverage.

The fund invests in bonds of varying maturities, but normally limits its portfolio "duration" to within +/- 50% of the effective duration of the fund's benchmark index, Barclays US Mortgage-Backed Securities Index, as calculated by the investment advisor, which as of December 31, 2013 was approximately 4.85 years. Duration is a measure of the fund's exposure to interest rate risk—a longer duration means that changes in market interest rates are likely to have a larger effect on the value of the fund's portfolio.

The fund may engage in "short-selling" with respect to securities issued by the US Treasury and certain TBA securities coupon trades. For example, the fund may take a short position in TBA securities as a means of profiting if the underlying mortgages decline in value. The fund also may hold or purchase TBA securities with one coupon and take a short position in TBA securities with another coupon. Although the price movements of the short and long positions of the transaction are, in general, correlated due to the two securities having comparable credit quality and liquidity level, there may be variances between the price movements of different coupon instruments, potentially permitting the fund to add to its return.

The fund's investment strategies may result in high portfolio turnover.

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. Pacific Investment Management Company LLC ("PIMCO") currently serves as the fund's investment advisor. PIMCO establishes duration targets for the fund's portfolio based on its expectations for changes in interest rates and then positions the fund to take advantage of yield curve shifts. PIMCO decides to buy or sell specific bonds based on an analysis of their values relative to other similar bonds. PIMCO monitors the prepayment experience of the fund's mortgage-backed securities and will also buy and sell securities to adjust the fund's average portfolio duration, credit quality, yield curve and sector and prepayment exposure, as appropriate.

Principal risks

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:

US Government securities risk: There are different types of US government securities with different levels of credit risk, including the risk of default, depending on the nature of the particular government support for that security. For example, a US government-sponsored entity, such as Federal National Mortgage Association ("Fannie Mae") or Federal Home Loan Mortgage Corporation ("Freddie Mac"), although chartered or sponsored by an Act of Congress, may issue securities that are neither insured nor guaranteed by the US Treasury and are therefore riskier than those that are.

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.

Prepayment risk: The fund's mortgage- and asset-backed securities may be prepaid more rapidly than expected, especially when interest rates are falling, and the fund may have to reinvest those prepayments at lower interest rates. When interest rates are rising, slower prepayments may extend the duration of the securities and may reduce their value.

Leverage risk associated with financial instruments: The use of financial instruments to increase potential returns, including derivatives used for investment (non-hedging) purposes, may cause the fund to be more volatile than if it had not been leveraged. The use of leverage may also accelerate the velocity of losses and can result in losses to the fund that exceed the amount originally invested.

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.

Short sales risk: There are certain unique risks associated with the use of short sales strategies. When selling a security short, the 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.

Arbitrage trading risk: The underlying relationships between securities in which the fund takes arbitrage investment positions may change in an adverse manner, causing the fund to realize losses.

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.

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.

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.

Management risk: The risk that the investment strategies, techniques and risk analyses employed by the investment advisor may not produce the desired results.

Mortgage-related securities risk: Mortgage-related securities are subject to risks that are different from and/or more acute than risks associated with other types of debt instruments. Such risks may include prepayment risk, as discussed above. Conversely, in periods of rising interest rates, the fund may be subject to extension risk, and may receive principal later than expected, causing additional volatility. During periods of difficult or frozen credit markets, significant changes in interest rates, or deteriorating economic conditions, such securities may decline in value, face valuation difficulties, become more volatile and become illiquid. Certain types of mortgage-backed securities (e.g., CMOs and stripped mortgage-backed securities) can be even more volatile and may be more sensitive to the rate of prepayments than other mortgage-related securities. The risk of default for "sub-prime" mortgages is generally higher than other types of mortgage-backed securities. The structure of some of these securities may be complex, and there may be less available information than other types of debt securities.

Performance

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. 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.

PACE Mortgage-Backed Securities Fixed Income Investments Annual Total Returns of Class P Shares

Best quarter during calendar years shown—3Q 2009: 3.85%
Worst quarter during calendar years shown—2Q 2013: (2.12)%

Average annual total returns (figures reflect 2% PACE Select Advisors Program Fee) (for the periods ended December 31, 2013)

Average Annual Returns Class P Prospectus PACE® Mortgage-Backed Securities Fixed Income Investments	Average Annual Returns, 1 Year	Average Annual Returns, 5 Years	Average Annual Returns, 10 Years	Average Annual Returns, Inception Date
Class P	(3.71%)	2.65%	2.39%	Aug. 24, 1995
Class P After Taxes on Distributions	(4.79%)	0.84%	0.71%
Class P After Taxes on Distributions and Sale of Fund Shares	(2.09%)	1.46%	1.27%
Class P Barclays US Mortgage-Backed Securities Index (Index reflects no deduction for fees, expenses or taxes.)	(1.41%)	3.69%	4.61%

[1] 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: (1) waive its management fees through March 31, 2015 to the extent necessary to reflect the lower sub-advisory fee paid by UBS Global AM to Pacific Investment Management Company LLC, the fund's investment advisor; and (2) waive its management fees and/or reimburse expenses so that the fund's ordinary total operating expenses through March 31, 2015 (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 0.72%. The fund has agreed to repay UBS Global AM for any waived fees/reimbursed expenses (pursuant to item (2)) 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.

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

XML

Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

PACE® International Fixed Income Investments

Objective [Heading]

rr_ObjectiveHeading

Investment objective

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

High total return.

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)

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 lesser of the offering price or the redemption price)

rr_MaximumDeferredSalesChargeOverOther

none

Redemption Fee (as a percentage of Amount Redeemed)

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%

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)

Management fees

rr_ManagementFeesOverAssets

0.65%

Distribution and/or service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

none

Other expenses (includes administration fee of 0.10%)

rr_OtherExpensesOverAssets

0.45%

Total annual fund operating expenses

rr_ExpensesOverAssets

1.10%

Fee Waiver or Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.10%)

^[1]

Total annual fund operating expenses after fee waiver and/or expense reimbursements

rr_NetExpensesOverAssets

1.00%

^[1]

Fee Waiver or Reimbursement over Assets, Date of Termination

rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination

2015-03-31

Portfolio Turnover [Heading]

rr_PortfolioTurnoverHeading

Portfolio turnover

Portfolio Turnover [Text Block]

rr_PortfolioTurnoverTextBlock

The fund pays transaction costs, such as commissions or dealer spreads, 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 63% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

63.00%

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:

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 303

^[2]

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

947

^[2]

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

1,617

^[2]

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 3,404

^[2]

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 fixed income securities. Such investments may include non-US government bonds (including bonds issued by supranational organizations and quasi-governmental entities), US government bonds, and bonds of US or non-US private issuers. While the fund may invest in US fixed income securities, it expects to invest mainly in non-US fixed income securities under normal circumstances. The fund invests primarily in high-grade bonds of governmental and private issuers in developed countries. These high-grade bonds are rated in one of the three highest rating categories or are of comparable quality. The fund invests, to a limited extent, in emerging market bonds and lower rated bonds of governmental and private issuers, including bonds that are rated below investment grade (commonly known as "junk bonds").

The fund invests in bonds of varying maturities, but normally limits its portfolio "duration" to between four and eight years. Duration is a measure of the fund's exposure to interest rate risk—a longer duration means that changes in market interest rates are likely to have a larger effect on the value of the fund's portfolio.

The fund's investments may include mortgage- and asset-backed securities. The fund may, but is not required to, use exchange-traded or over-the-counter derivative instruments for risk management purposes or to attempt to increase total returns. The derivatives in which the fund may invest include currency forward agreements. These derivatives may be used for risk management purposes, such as hedging the fund's currency exposure, or otherwise managing the risk profile of the fund. In addition, these derivative instruments may be used to enhance returns; in place of direct investments; or to obtain or adjust exposure to certain markets.

There are different types of US government securities, including those issued or guaranteed by the US government, its agencies and its instrumentalities, and they have different types of government support. Some are supported by the full faith and credit of the US, while others are supported by (1) the ability of the issuer to borrow from the US Treasury; (2) the credit of the issuing agency, instrumentality or government-sponsored entity; (3) pools of assets, such as mortgages; or (4) the US government in some other way.

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. Rogge Global Partners plc ("Rogge Global Partners") currently serves as the fund's investment advisor. Rogge Global Partners seeks to invest in bonds of financially healthy entities because it believes that these investments produce the highest bond and currency returns over time. In deciding which bonds to buy for the fund, Rogge Global Partners uses a top-down analysis to find value across countries and to forecast interest and currency-exchange rates over a one-year horizon in those coun- tries, and an optimization model to help determine country, currency and duration positions for the fund. Rogge Global Partners generally sells securities (1) that no longer meet these selection criteria; (2) when it identifies more attractive investment opportunities; or (3) to adjust the average duration of the fund assets it manages. Rogge Global Partners may hedge the fund's exposure to foreign currencies to varying degrees as it deems appropriate.

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:

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.

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.

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.

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 is- suers 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.

Prepayment risk: The fund's mortgage- and asset-backed securities may be prepaid more rapidly than expected, especially when interest rates are falling, and the fund may have to reinvest those prepayments at lower interest rates. When interest rates are rising, slower prepayments may extend the duration of the securities and may reduce their value.

Derivatives risk: The value of "derivatives"—so called because their value "derives" from the value of an underlying asset, reference rate or index—may rise or fall more rapidly than other investments. When using derivatives for non-hedging purposes, it is possible for the fund to lose more than the amount it invested in the derivative. When using derivatives for hedging purposes, the fund's overall returns may be reduced if the hedged investment experiences a favorable price movement. The risks of investing in derivative instruments also include market and management risks. Derivatives relating to fixed income markets are especially susceptible to interest rate risk and credit risk. In addition, many types of non-exchange traded derivatives may be subject to liquidity risk, counterparty risk, credit risk and mispricing or valuation complexity. These derivatives risks are different from, and may be greater than, the risks associated with investing directly in securities and other instruments.

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.

US Government securities risk: There are different types of US government securities with different levels of credit risk, including the risk of default, depending on the nature of the particular government support for that security. For example, a US government-sponsored entity, such as Federal National Mortgage Association ("Fannie Mae") or Federal Home Loan Mortgage Corporation ("Freddie Mac"), although chartered or sponsored by an Act of Congress, may issue securities that are neither insured nor guaranteed by the US Treasury and are therefore riskier than those that are.

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.

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.

High yield securities ("junk bonds") risk: Lower-rated securities (the issuers of which are typically in poor financial health) are subject to higher risks than investment grade securities. For example, lower-rated securities may be (1) subject to a greater risk of loss of principal and non-payment of interest (including default by the issuer); (2) subject to greater price volatility; and (3) less liquid than investment grade securities. The prices of such securities may be more vulnerable to bad economic news, or even the expectation of bad news, than higher rated fixed income securities.

Management risk: The risk that the investment strategies, techniques and risk analyses employed by the investment advisor may not produce the desired results.

Mortgage-related securities risk: Mortgage-related securities are subject to risks that are different from and/or more acute than risks associated with other types of debt instruments. Such risks may include prepayment risk, as discussed above. Conversely, in periods of rising interest rates, the fund may be subject to extension risk, and may receive principal later than expected, causing additional volatility. During periods of difficult or frozen credit markets, significant changes in interest rates, or deteriorating economic conditions, such securities may decline in value, face valuation difficulties, become more volatile and become illiquid. Certain types of mortgage-backed securities (e.g., CMOs and stripped mortgage-backed securities) can be even more volatile and may be more sensitive to the rate of prepayments than other mortgage-related securities. The risk of default for "sub-prime" mortgages is generally higher than other types of mortgage-backed securities. The structure of some of these securities may be complex, and there may be less available information than other types of debt securities.

Risk Lose Money [Text]

rr_RiskLoseMoney

You may lose money by investing in the fund.

Risk Nondiversified Status [Text]

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 is- suers 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 [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 Barclays Global Aggregate ex USD 50% Hedged Index provides information regarding the effectiveness of the fund's currency hedging policy. 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 between October 10, 2000 and August 22, 2007, when Rogge Global Partners and another investment advisor each was responsible for managing a separate portion of the fund's assets. In addition, prior to December 1, 2005, the fund had been following a strategy of investing in both US and non-US fixed income investments, but effective as of that date, the fund modified its strategy to focus more on non-US fixed income investment opportunities. 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 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.

Performance Additional Market Index [Text]

rr_PerformanceAdditionalMarketIndex

The Barclays Global Aggregate ex USD 50% Hedged Index provides information regarding the effectiveness of the fund's currency hedging policy.

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 Fixed Income 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.

Annual Return 2004

rr_AnnualReturn2004

10.03%

Annual Return 2005

rr_AnnualReturn2005

(5.98%)

Annual Return 2006

rr_AnnualReturn2006

5.56%

Annual Return 2007

rr_AnnualReturn2007

10.35%

Annual Return 2008

rr_AnnualReturn2008

1.27%

Annual Return 2009

rr_AnnualReturn2009

10.13%

Annual Return 2010

rr_AnnualReturn2010

5.17%

Annual Return 2011

rr_AnnualReturn2011

2.84%

Annual Return 2012

rr_AnnualReturn2012

5.30%

Annual Return 2013

rr_AnnualReturn2013

(6.14%)

Bar Chart Closing [Text Block]

rr_BarChartClosingTextBlock

Best quarter during calendar years shown—3Q 2010: 11.45%
Worst quarter during calendar years shown—3Q 2008: (7.33)%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Best quarter during calendar years shown

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Sep. 30, 2010

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

11.45%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Worst quarter during calendar years shown

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Sep. 30, 2008

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(7.33%)

Index No Deduction for Fees, Expenses, Taxes [Text]

rr_IndexNoDeductionForFeesExpensesTaxes

(Indices reflect 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 (figures reflect 2% PACE Select Advisors Program Fee) (for the periods ended December 31, 2013)

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

(8.00%)

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

1.27%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

1.63%

Average Annual Returns, Inception Date

rr_AverageAnnualReturnInceptionDate

Aug. 24, 1995

After Taxes on Distributions

Risk/Return:

rr_RiskReturnAbstract

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

(8.46%)

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

(0.19%)

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

(0.07%)

After Taxes on Distributions and Sale of Fund Shares

Risk/Return:

rr_RiskReturnAbstract

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

(4.53%)

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

0.52%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

0.70%

Barclays Global Aggregate ex US Index (Indices reflect no deduction for fees, expenses or taxes.)

Risk/Return:

rr_RiskReturnAbstract

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

(3.08%)

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

3.51%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

4.35%

Barclays Global Aggregate ex USD 50% Hedged Index (Indices reflects no deduction for fees, expenses or taxes.)

Risk/Return:

rr_RiskReturnAbstract

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

(0.94%)

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

3.76%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

4.41%

[1] 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: (1) waive its management fees through March 31, 2015 to the extent necessary to reflect the lower sub-advisory fee paid by UBS Global AM to Rogge Global Partners plc, the fund's investment advisor; and (2) waive its management fees and/or reimburse expenses so that the fund's ordinary total operating expenses through March 31, 2015 (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 1.00%. The fund has agreed to repay UBS Global AM for any waived fees/reimbursed expenses (pursuant to item (2)) 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.

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

XML

Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

PACE® Municipal Fixed Income Investments

Objective [Heading]

rr_ObjectiveHeading

Investment objective

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

High current income exempt from federal income tax.

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. You may qualify for sales charge discounts on purchases of Class A shares if you or your family invest, or agree to invest in the future, at least $100,000 in the UBS family of funds. More information about these and other discounts and waivers, as well as eligibility requirements for each share class, is available from your financial advisor and in "Managing your fund account" on page 109 of the prospectus and in "Reduced sales charges, additional purchase, exchange and redemption information and other services" on page 208 of the fund's Statement of Additional Information.

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)

Fee Waiver or Reimbursement over Assets, Date of Termination

rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination

2015-03-31

Portfolio Turnover [Heading]

rr_PortfolioTurnoverHeading

Portfolio turnover

Portfolio Turnover [Text Block]

rr_PortfolioTurnoverTextBlock

The fund pays transaction costs, such as commissions or dealer spreads, 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 69% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

69.00%

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 unless otherwise stated. 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 municipal fixed income investments, the income from which is exempt from regular federal income taxes. The fund invests principally in investment grade municipal bonds of varying maturities. Normally, the fund limits its investments in municipal bonds that are subject to the federal alternative minimum tax ("AMT") so that not more than 25% of its interest income will be subject to the AMT, and invests in these bonds when its investment advisor believes that they offer attractive yields relative to similar municipal bonds that are not subject to the AMT.

The fund normally limits its portfolio "duration" to between three and seven years. Duration is a measure of the fund's exposure to interest rate risk—a longer duration means that changes in market interest rates are likely to have a larger effect on the value of the fund's portfolio.

The fund may invest up to 50% of its total assets in municipal bonds that are secured by revenues from public housing authorities and state and local housing finance authorities, including bonds that are secured or backed by the US Treasury or other US government guaranteed securities. There are different types of US government securities, including those issued or guaranteed by the US government, its agencies and its instrumentalities, and they have different types of government support. Some are supported by the full faith and credit of the US, while others are supported by (1) the ability of the issuer to borrow from the US Treasury; (2) the credit of the issuing agency, instrumentality or government-sponsored entity; (3) pools of assets, such as mortgages; or (4) the US government in some other way.

The fund limits its investments in municipal bonds with the lowest investment grade rating (or unrated bonds of equivalent quality) to 15% of its total assets at the time the bonds are purchased.

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. Standish Mellon Asset Management Company LLC ("Standish") currently serves as the fund's investment advisor. In deciding which securities to buy for the fund, Standish seeks to identify undervalued sectors or geographical regions of the municipal market or undervalued individual securities, by using credit research and valuation analysis and monitoring the relationship of the municipal yield curve to the treasury yield curve. Standish also uses credit quality assessments from its in-house analysts to identify potential rating changes, undervalued issues and macro trends with regard to market sectors and geographical regions. Standish may make modest duration adjustments based on economic analyses and interest rate forecasts. Standish generally sells securities (1) if it identifies more attractive investment opportunities within its investment criteria; (2) with weakening credit profiles; or (3) to adjust the average duration of the fund's portfolio.

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:

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.

Municipal securities risk: Municipal securities are subject to interest rate and credit risks. The ability of a municipal issuer to make payments and the value of municipal securities can be affected by uncertainties in the municipal securities market. Such uncertainties could cause increased volatility in the municipal securities market and could negatively impact the fund's net asset value and/or the distributions paid by the fund. Municipal bonds secured by revenues from public housing authorities may be subject to additional uncertainties relating to the possibility that proceeds may exceed supply of available mortgages to be purchased by public housing authorities, resulting in early retirement of bonds, or that homeowner repayments will create an irregular cash flow. Municipalities continue to experience difficulties in the current economic and political environment.

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.

Related securities concentration risk: Because the fund may invest more than 25% of its total assets in municipal bonds that are issued to finance similar projects, changes that affect one type of municipal bond may have a significant impact on the value of the fund.

US Government securities risk: There are different types of US government securities with different levels of credit risk, including the risk of default, depending on the nature of the particular government support for that security. For example, a US government-sponsored entity, such as Federal National Mortgage Association ("Fannie Mae") or Federal Home Loan Mortgage Corporation ("Freddie Mac"), although chartered or sponsored by an Act of Congress, may issue securities that are neither insured nor guaranteed by the US Treasury and are therefore riskier than those that are.

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.

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.

Management risk: The risk that the investment strategies, techniques and risk analyses employed by the investment advisor may not produce the desired results.

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 sales charges of the fund's Class C shares; 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. 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. After-tax returns for other classes will vary from the Class C shares' after-tax returns shown.

Performance Information Illustrates Variability of Returns [Text]

rr_PerformanceInformationIllustratesVariabilityOfReturns

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.

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 Municipal Fixed Income Investments Annual Total Returns of Class C Shares

Bar Chart Does Not Reflect Sales Loads [Text]

rr_BarChartDoesNotReflectSalesLoads

The bar chart does not reflect the sales charges of the fund's Class C shares; if it did, the total returns shown would be lower.

Bar Chart Closing [Text Block]

rr_BarChartClosingTextBlock

Best quarter during calendar years shown—3Q 2009: 5.93%
Worst quarter during calendar years shown—4Q 2010: (3.31)%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Best quarter during calendar years shown

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Sep. 30, 2009

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

5.93%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Worst quarter during calendar years shown

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Dec. 31, 2010

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(3.31%)

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.

Performance Table One Class of after Tax Shown [Text]

rr_PerformanceTableOneClassOfAfterTaxShown

After-tax returns for other classes will vary from the Class C shares' after-tax returns shown.

Caption

rr_AverageAnnualReturnCaption

Average annual total returns (figures reflect sales charges) (for the periods ended December 31, 2013)

Barclays US Municipal 3-15 Year Blend Index (Index reflects no deduction for fees, expenses or taxes.)

Risk/Return:

rr_RiskReturnAbstract

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

(1.24%)

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

5.15%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

4.26%

Class A

Risk/Return:

rr_RiskReturnAbstract

Maximum front-end sales charge (load) imposed on purchases (as a % of the offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

4.50%

Maximum deferred sales charge (load) (as a % of the lesser of the offering price or the redemption price)

rr_MaximumDeferredSalesChargeOverOther

none

Redemption Fee (as a percentage of Amount Redeemed)

rr_RedemptionFeeOverRedemption

(1.00%)

Exchange fee

rr_ExchangeFeeOverRedemption

none

Management fees

rr_ManagementFeesOverAssets

0.44%

Distribution and/or service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Other expenses (includes administration fee of 0.10%)

rr_OtherExpensesOverAssets

0.24%

Total annual fund operating expenses

rr_ExpensesOverAssets

0.93%

Fee Waiver or Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.03%)

^[1]

Total annual fund operating expenses after fee waiver and/or expense reimbursements

rr_NetExpensesOverAssets

0.90%

^[1]

Expense Breakpoint Discounts [Text]

rr_ExpenseBreakpointDiscounts

You may qualify for sales charge discounts on purchases of Class A shares if you or your family invest, or agree to invest in the future, at least $100,000 in the UBS family of funds.

Expense Breakpoint, Minimum Investment Required [Amount]

rr_ExpenseBreakpointMinimumInvestmentRequiredAmount

$ 100,000

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

538

^[2]

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

730

^[2]

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

939

^[2]

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,539

^[2]

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

(6.39%)

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

3.75%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

2.73%

Average Annual Returns, Inception Date

rr_AverageAnnualReturnInceptionDate

Jan. 23, 2001

Class C

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 lesser of the offering price or the redemption price)

rr_MaximumDeferredSalesChargeOverOther

0.75%

Redemption Fee (as a percentage of Amount Redeemed)

rr_RedemptionFeeOverRedemption

(1.00%)

Exchange fee

rr_ExchangeFeeOverRedemption

none

Management fees

rr_ManagementFeesOverAssets

0.44%

Distribution and/or service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

0.75%

Other expenses (includes administration fee of 0.10%)

rr_OtherExpensesOverAssets

0.25%

Total annual fund operating expenses

rr_ExpensesOverAssets

1.44%

Fee Waiver or Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.04%)

^[1]

Total annual fund operating expenses after fee waiver and/or expense reimbursements

rr_NetExpensesOverAssets

1.40%

^[1]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

218

^[2]

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

452

^[2]

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

783

^[2]

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,721

^[2]

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

143

^[2]

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

452

^[2]

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

783

^[2]

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

1,721

^[2]

Annual Return 2004

rr_AnnualReturn2004

1.53%

Annual Return 2005

rr_AnnualReturn2005

0.34%

Annual Return 2006

rr_AnnualReturn2006

2.47%

Annual Return 2007

rr_AnnualReturn2007

2.65%

Annual Return 2008

rr_AnnualReturn2008

(0.90%)

Annual Return 2009

rr_AnnualReturn2009

9.31%

Annual Return 2010

rr_AnnualReturn2010

1.96%

Annual Return 2011

rr_AnnualReturn2011

8.96%

Annual Return 2012

rr_AnnualReturn2012

3.51%

Annual Return 2013

rr_AnnualReturn2013

(2.44%)

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

(3.15%)

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

4.17%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

2.68%

Average Annual Returns, Inception Date

rr_AverageAnnualReturnInceptionDate

Dec. 04, 2000

Class C | After Taxes on Distributions

Risk/Return:

rr_RiskReturnAbstract

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

(3.32%)

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

4.11%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

2.65%

Class C | After Taxes on Distributions and Sale of Fund Shares

Risk/Return:

rr_RiskReturnAbstract

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

(0.81%)

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

3.80%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

2.65%

Class Y

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 lesser of the offering price or the redemption price)

rr_MaximumDeferredSalesChargeOverOther

none

Redemption Fee (as a percentage of Amount Redeemed)

rr_RedemptionFeeOverRedemption

(1.00%)

Exchange fee

rr_ExchangeFeeOverRedemption

none

Management fees

rr_ManagementFeesOverAssets

0.44%

Distribution and/or service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

none

Other expenses (includes administration fee of 0.10%)

rr_OtherExpensesOverAssets

0.28%

Total annual fund operating expenses

rr_ExpensesOverAssets

0.72%

Fee Waiver or Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.07%)

^[1]

Total annual fund operating expenses after fee waiver and/or expense reimbursements

rr_NetExpensesOverAssets

0.65%

^[1]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

66

^[2]

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

223

^[2]

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

394

^[2]

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 888

^[2]

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

(1.70%)

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

4.97%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

3.44%

Average Annual Returns, Inception Date

rr_AverageAnnualReturnInceptionDate

Feb. 23, 2001

[1] 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 of each class through March 31, 2015 (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 0.90% for Class A, 1.40% for Class C and 0.65% for Class Y. 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 these expense caps. 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.

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

XML

Class P Prospectus | PACE® Small/Medium Co Value Equity Investments | Class P

PACE® Small/Medium Co Value Equity Investments

Investment objective

Capital appreciation.

Fees and expenses of the fund

These tables describe the fees and expenses that you may pay if you buy and hold shares of the fund.

Shareholder fees (fees paid directly from your investment)

Shareholder Fees	Class P Prospectus PACE® Small/Medium Co Value Equity Investments Class P
Maximum front-end sales charge (load) imposed on purchases (as a % of the offering price)	none
Maximum deferred sales charge (load) (as a % of the offering price)	none
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)	2.00%
Redemption fee (as a % of the amount redeemed within 90 days of purchase, if applicable)	1.00%

Annual fund operating expenses (expenses that you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses		Class P Prospectus PACE® Small/Medium Co Value Equity Investments Class P
Management fees		0.70%
Distribution and/or service (12b-1) fees		none
Other expenses (includes administration fee of 0.10%)	[1]	0.46%
Acquired fund fees and expenses	[2]	0.06%
Total annual fund operating expenses		1.22%

Example

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:

Expense Example (USD $)	1 year	3 years	5 years	10 years
Class P Prospectus PACE® Small/Medium Co Value Equity Investments Class P	325	990	1,679	3,513

Portfolio turnover

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 97% of the average value of its portfolio.

Principal strategies

Principal investments

The fund invests primarily in stocks of companies that are believed to be undervalued or overlooked in the marketplace. These stocks also generally have price-to-earnings ("P/E") ratios below the market average. 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 issued by small/medium capitalization companies. As of the date of this prospectus, small/medium capitalization companies means companies with a total market capitalization of less than $6.0 billion at the time of purchase. Effective April 28, 2014, small/medium capitalization companies means companies with a total market capitalization within the market capitalization range of the companies in the Russell 2500^® Value Index at the time of pur- chase. The fund invests only in stocks that are traded on major exchanges or the over-the-counter market.

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 stocks of companies with larger total market capitalizations and other securities, including securities convertible into stocks. The fund may invest up to 10% of its total assets in non-US securities, which may trade either within or outside the US.

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. Metropolitan West Capital Management, LLC ("MetWest Capital"), Systematic Financial Management, L.P. ("Systematic") and Kayne Anderson Rudnick Investment Management, LLC ("Kayne Anderson Rudnick") 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.

MetWest Capital directly researches smaller capitalization businesses it views as "high-quality" and attempts to identify companies selling below intrinsic value with one or more clear catalysts to realize full value within the investment time horizon (typically two to four years). MetWest Capital utilizes a bottom-up, fundamental, research-driven, low-risk style that it believes is ideally suited to the small cap market segment, along with a long-term focus that attempts to take advantage of opportunities presented by short-term anomalies in high-quality stocks.

Systematic employs an investment approach that utilizes (1) quantitative screening of all companies within the small/mid capitalization universe and (2) fundamental research, which seeks to gauge investor expectations by focusing on key revenue and margin assumptions underlying earnings estimates. Systematic's investment philosophy is predicated on its belief that stock prices reflect the market's estimates of earnings, and as revisions to those estimates are made by the market, stock prices will follow suit. By focusing only on companies whose fundamentals are improving, as confirmed by Systematic's research analysis and as evidenced by a positive earnings surprise, Systematic's process seeks to avoid the chances of buying stocks that have experienced significant price depreciation and, as a result, are mistaken as value stocks. Systematic is expected to typi- cally invest in 60 to 90 securities, with a market capitalization range generally consistent with that of the fund's benchmark.

Kayne Anderson Rudnick employs a fundamental, bottom-up, research-driven investment style and utilizes a disciplined investment process to identify high-quality companies that possess solid investment-grade balance sheets, generate positive cash flow, and whose securities can be acquired at attractive valuations. Kayne Anderson Rudnick's first-hand fundamental research process involves carefully evaluating a company from a three-tiered perspective involving qualitative, financial, and valuation analyses. Qualitative analysis assesses the company's long-term market positioning in terms of market structure and prospects, business model and strategies, and competitive advantages. Financial analysis involves an historical examination of the income statement, cash flow statement, balance sheet, and associated ratios on an absolute and peer relative basis. Valuation analysis determines the current and potential value of each company in the investable universe. The portfolio managers establish price ranges for each security held, these prices are developed in consideration of expected return and comparative valuation, and they are actively monitored. Sector weights are also actively evaluated.

Principal risks

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.

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.

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.

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.

Management risk: The risk that the investment strategies, techniques and risk analyses employed by an investment advisor may not produce the desired results.

Performance

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. On October 1, 2005, MetWest Capital assumed day-to-day management of a portion of the fund's assets. On May 28, 2009, Systematic assumed responsibility for managing a portion of the fund's assets. Kayne Anderson Rudnick as- sumed day-to-day management of a separate portion of the fund's assets on March 6, 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.

PACE Small/Medium Co Value Equity Investments Annual Total Returns of Class P Shares

Best quarter during calendar years shown—2Q 2009: 27.55%
Worst quarter during calendar years shown—4Q 2008: (27.67)%

Average annual total returns (figures reflect 2% PACE Select Advisors Program Fee) (for the periods ended December 31, 2013)

Average Annual Returns Class P Prospectus PACE® Small/Medium Co Value Equity Investments	Average Annual Returns, 1 Year	Average Annual Returns, 5 Years	Average Annual Returns, 10 Years	Average Annual Returns, Inception Date
Class P	32.88%	17.49%	5.62%	Aug. 24, 1995
Class P After Taxes on Distributions	28.73%	16.71%	4.48%
Class P After Taxes on Distributions and Sale of Fund Shares	21.09%	14.11%	4.49%
Class P Russell 2500 Growth Index (Index reflects no deduction for fees, expenses or taxes.)	33.32%	19.61%	9.29%

[1] Includes recoupment of 0.01% from the fund's Class P shares expenses previously reimbursed by UBS Global Asset Management (Americas) Inc. ("UBS Global AM") under a written fee waiver/expense reimbursement agreement.

[2] Since the "Acquired fund fees and expenses" are not directly borne by the fund, they are not reflected in the fund's financial statements, and therefore the amounts listed in "Total annual fund operating expenses" will differ from those presented in the Financial highlights.

XML

Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

PACE® Mortgage-Backed Securities Fixed Income Investments

Objective [Heading]

rr_ObjectiveHeading

Investment objective

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

Current income.

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)

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 lesser of the offering price or the redemption price)

rr_MaximumDeferredSalesChargeOverOther

none

Redemption Fee (as a percentage of Amount Redeemed)

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%

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)

Management fees

rr_ManagementFeesOverAssets

0.52%

Distribution and/or service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

none

Other expenses (includes administration fee of 0.10%)

rr_OtherExpensesOverAssets

0.34%

Total annual fund operating expenses

rr_ExpensesOverAssets

0.86%

Fee Waiver or Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.14%)

^[1]

Total annual fund operating expenses after fee waiver and/or expense reimbursements

rr_NetExpensesOverAssets

0.72%

^[1]

Fee Waiver or Reimbursement over Assets, Date of Termination

rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination

2015-03-31

Portfolio Turnover [Heading]

rr_PortfolioTurnoverHeading

Portfolio turnover

Portfolio Turnover [Text Block]

rr_PortfolioTurnoverTextBlock

The fund pays transaction costs, such as commissions or dealer spreads, 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 1,336% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

1336.00%

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:

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 275

^[2]

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

873

^[2]

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

1,496

^[2]

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 3,175

^[2]

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 a diversified portfolio of mortgage-related fixed income instruments, such as mortgage-backed securities (including mortgage pass- through securities and collateralized mortgage obligations ("CMOs"), commercial mortgage-backed securities, "to be announced" (or "TBA") securities and mortgage dollar rolls). The mortgage-backed securities in which the fund may invest include those issued or guaranteed by US government agencies or instrumentalities or private entities.

The fund also may invest in other types of investment grade fixed income instruments (or unrated bonds of equivalent quality).

TBA securities are mortgage-backed securities that usually are traded on a forward commitment basis with an approximate principal amount and no defined maturity date, issued or guaranteed by US government agencies and instrumentalities. The fund also may engage in TBA and Treasury "roll" transactions. A TBA roll transaction is a strategy whereby the investment advisor decides to sell one TBA security and buy another TBA security due at a later date (Treasury roll transactions differ in that the underlying securities are US Treasury securities). The fund also may invest in when-issued or delayed delivery bonds to increase its return, giving rise to a form of leverage.

The fund invests in bonds of varying maturities, but normally limits its portfolio "duration" to within +/- 50% of the effective duration of the fund's benchmark index, Barclays US Mortgage-Backed Securities Index, as calculated by the investment advisor, which as of December 31, 2013 was approximately 4.85 years. Duration is a measure of the fund's exposure to interest rate risk—a longer duration means that changes in market interest rates are likely to have a larger effect on the value of the fund's portfolio.

The fund may engage in "short-selling" with respect to securities issued by the US Treasury and certain TBA securities coupon trades. For example, the fund may take a short position in TBA securities as a means of profiting if the underlying mortgages decline in value. The fund also may hold or purchase TBA securities with one coupon and take a short position in TBA securities with another coupon. Although the price movements of the short and long positions of the transaction are, in general, correlated due to the two securities having comparable credit quality and liquidity level, there may be variances between the price movements of different coupon instruments, potentially permitting the fund to add to its return.

The fund's investment strategies may result in high portfolio turnover.

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. Pacific Investment Management Company LLC ("PIMCO") currently serves as the fund's investment advisor. PIMCO establishes duration targets for the fund's portfolio based on its expectations for changes in interest rates and then positions the fund to take advantage of yield curve shifts. PIMCO decides to buy or sell specific bonds based on an analysis of their values relative to other similar bonds. PIMCO monitors the prepayment experience of the fund's mortgage-backed securities and will also buy and sell securities to adjust the fund's average portfolio duration, credit quality, yield curve and sector and prepayment exposure, as appropriate.

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:

US Government securities risk: There are different types of US government securities with different levels of credit risk, including the risk of default, depending on the nature of the particular government support for that security. For example, a US government-sponsored entity, such as Federal National Mortgage Association ("Fannie Mae") or Federal Home Loan Mortgage Corporation ("Freddie Mac"), although chartered or sponsored by an Act of Congress, may issue securities that are neither insured nor guaranteed by the US Treasury and are therefore riskier than those that are.

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.

Prepayment risk: The fund's mortgage- and asset-backed securities may be prepaid more rapidly than expected, especially when interest rates are falling, and the fund may have to reinvest those prepayments at lower interest rates. When interest rates are rising, slower prepayments may extend the duration of the securities and may reduce their value.

Leverage risk associated with financial instruments: The use of financial instruments to increase potential returns, including derivatives used for investment (non-hedging) purposes, may cause the fund to be more volatile than if it had not been leveraged. The use of leverage may also accelerate the velocity of losses and can result in losses to the fund that exceed the amount originally invested.

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.

Short sales risk: There are certain unique risks associated with the use of short sales strategies. When selling a security short, the 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.

Arbitrage trading risk: The underlying relationships between securities in which the fund takes arbitrage investment positions may change in an adverse manner, causing the fund to realize losses.

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.

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.

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.

Management risk: The risk that the investment strategies, techniques and risk analyses employed by the investment advisor may not produce the desired results.

Mortgage-related securities risk: Mortgage-related securities are subject to risks that are different from and/or more acute than risks associated with other types of debt instruments. Such risks may include prepayment risk, as discussed above. Conversely, in periods of rising interest rates, the fund may be subject to extension risk, and may receive principal later than expected, causing additional volatility. During periods of difficult or frozen credit markets, significant changes in interest rates, or deteriorating economic conditions, such securities may decline in value, face valuation difficulties, become more volatile and become illiquid. Certain types of mortgage-backed securities (e.g., CMOs and stripped mortgage-backed securities) can be even more volatile and may be more sensitive to the rate of prepayments than other mortgage-related securities. The risk of default for "sub-prime" mortgages is generally higher than other types of mortgage-backed securities. The structure of some of these securities may be complex, and there may be less available information than other types of debt securities.

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. 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 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.

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 Mortgage-Backed Securities Fixed Income 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.

Annual Return 2004

rr_AnnualReturn2004

4.44%

Annual Return 2005

rr_AnnualReturn2005

2.12%

Annual Return 2006

rr_AnnualReturn2006

5.01%

Annual Return 2007

rr_AnnualReturn2007

6.00%

Annual Return 2008

rr_AnnualReturn2008

3.44%

Annual Return 2009

rr_AnnualReturn2009

10.11%

Annual Return 2010

rr_AnnualReturn2010

7.14%

Annual Return 2011

rr_AnnualReturn2011

5.53%

Annual Return 2012

rr_AnnualReturn2012

2.99%

Annual Return 2013

rr_AnnualReturn2013

(1.77%)

Bar Chart Closing [Text Block]

rr_BarChartClosingTextBlock

Best quarter during calendar years shown—3Q 2009: 3.85%
Worst quarter during calendar years shown—2Q 2013: (2.12)%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Best quarter during calendar years shown

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Sep. 30, 2009

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

3.85%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Worst quarter during calendar years shown

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Jun. 30, 2013

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(2.12%)

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 (figures reflect 2% PACE Select Advisors Program Fee) (for the periods ended December 31, 2013)

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

(3.71%)

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

2.65%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

2.39%

Average Annual Returns, Inception Date

rr_AverageAnnualReturnInceptionDate

Aug. 24, 1995

After Taxes on Distributions

Risk/Return:

rr_RiskReturnAbstract

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

(4.79%)

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

0.84%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

0.71%

After Taxes on Distributions and Sale of Fund Shares

Risk/Return:

rr_RiskReturnAbstract

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

(2.09%)

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

1.46%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

1.27%

Barclays US Mortgage-Backed Securities Index (Index reflects no deduction for fees, expenses or taxes.)

Risk/Return:

rr_RiskReturnAbstract

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

(1.41%)

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

3.69%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

4.61%

[1] 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: (1) waive its management fees through March 31, 2015 to the extent necessary to reflect the lower sub-advisory fee paid by UBS Global AM to Pacific Investment Management Company LLC, the fund's investment advisor; and (2) waive its management fees and/or reimburse expenses so that the fund's ordinary total operating expenses through March 31, 2015 (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 0.72%. The fund has agreed to repay UBS Global AM for any waived fees/reimbursed expenses (pursuant to item (2)) 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.

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

XML

Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

PACE® Small/Medium Co Value 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. You may qualify for sales charge discounts on purchases of Class A shares if you or your family invest, or agree to invest in the future, at least $50,000 in the UBS family of funds. More information about these and other discounts and waivers, as well as eligibility requirements for each share class, is available from your financial advisor and in "Managing your fund account" on page 109 of the prospectus and in "Reduced sales charges, additional purchase, exchange and redemption information and other services" on page 208 of the fund's Statement of Additional Information.

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)

Fee Waiver or Reimbursement over Assets, Date of Termination

rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination

2015-03-31

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 97% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

97.00%

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 unless otherwise stated. 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

The fund invests primarily in stocks of companies that are believed to be undervalued or overlooked in the marketplace. These stocks also generally have price-to-earnings ("P/E") ratios below the market average. 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 issued by small/medium capitalization companies. As of the date of this prospectus, small/medium capitalization companies means companies with a total market capitalization of less than $6.0 billion at the time of purchase. Effective April 28, 2014, small/medium capitalization companies means companies with a total market capitalization within the market capitalization range of the companies in the Russell 2500^® Value Index at the time of purchase. The fund invests only in stocks that are traded on major exchanges or the over-the-counter market.

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 stocks of companies with larger total market capitalizations and other securities, including securities convertible into stocks.

The fund may invest up to 10% of its total assets in non-US securities, which may trade either within or outside the US.

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. Metropolitan West Capital Management, LLC ("MetWest Capital"), Systematic Financial Management, L.P. ("Systematic") and Kayne Anderson Rudnick Investment Management, LLC ("Kayne Anderson Rudnick") 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.

MetWest Capital directly researches smaller capitalization businesses it views as "high-quality" and attempts to identify companies selling below intrinsic value with one or more clear catalysts to realize full value within the investment time horizon (typically two to four years). MetWest Capital utilizes a bottom-up, fundamental, research-driven, low-risk style that it believes is ideally suited to the small cap market segment, along with a long-term focus that attempts to take advantage of opportunities presented by short-term anomalies in high-quality stocks.

Systematic employs an investment approach that utilizes (1) quantitative screening of all companies within the small/mid capitalization universe and (2) fundamental research, which seeks to gauge investor expectations by focusing on key revenue and margin assumptions underlying earnings estimates. Systematic's investment philosophy is predicated on its belief that stock prices reflect the market's estimates of earnings, and as revisions to those estimates are made by the market, stock prices will follow suit. By focusing only on companies whose fundamentals are improving, as confirmed by Systematic's research analysis and as evidenced by a positive earnings surprise, Systematic's process seeks to avoid the chances of buying stocks that have experienced significant price depreciation and, as a result, are mistaken as value stocks. Systematic is expected to typically invest in 60 to 90 securities, with a market capitalization range generally consistent with that of the fund's benchmark.

Kayne Anderson Rudnick employs a fundamental, bottom-up, research-driven investment style and utilizes a disciplined investment process to identify high-quality companies that possess solid investment-grade balance sheets, generate positive cash flow, and whose securities can be acquired at attractive valuations. Kayne Anderson Rudnick's first-hand fundamental research process involves carefully evaluating a company from a three-tiered perspective involving qualitative, financial, and valuation analyses. Qualitative analysis assesses the company's long-term market positioning in terms of market structure and prospects, business model and strategies, and competitive advantages. Financial analysis involves an historical examination of the income statement, cash flow statement, balance sheet, and associated ratios on an absolute and peer relative basis. Valuation analysis determines the current and potential value of each company in the investable universe. The portfolio managers establish price ranges for each security held, these prices are developed in consideration of expected return and comparative valuation, and they are actively monitored. Sector weights are also actively evaluated.

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.

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.

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.

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.

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 [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 sales charges of the fund's Class C shares; 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. On October 1, 2005, MetWest Capital assumed day-to-day management of a portion of the fund's assets. On May 28, 2009, Systematic assumed responsibility for managing a portion of the fund's assets. Kayne Anderson Rudnick assumed day-to-day management of a separate portion of the fund's assets on March 6, 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. After-tax returns for other classes will vary from the Class C shares' after-tax returns shown.

Performance Information Illustrates Variability of Returns [Text]

rr_PerformanceInformationIllustratesVariabilityOfReturns

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.

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 Small/Medium Co Value Equity Investments Annual Total Returns of Class C Shares

Bar Chart Does Not Reflect Sales Loads [Text]

rr_BarChartDoesNotReflectSalesLoads

The bar chart does not reflect the sales charges of the fund's Class C shares; if it did, the total returns shown would be lower.

Bar Chart Closing [Text Block]

rr_BarChartClosingTextBlock

Best quarter during calendar years shown—2Q 2009: 27.19%
Worst quarter during calendar years shown—4Q 2008: (27.90)%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Best quarter during calendar years shown

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Jun. 30, 2009

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

27.19%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Worst quarter during calendar years shown

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Dec. 31, 2008

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(27.90%)

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.

Performance Table One Class of after Tax Shown [Text]

rr_PerformanceTableOneClassOfAfterTaxShown

After-tax returns for other classes will vary from the Class C shares' after-tax returns shown.

Caption

rr_AverageAnnualReturnCaption

Average annual total returns (figures reflect sales charges) (for the periods ended December 31, 2013)

Russell 2500 Value Index (Index reflects no deduction for fees, expenses or taxes.)

Risk/Return:

rr_RiskReturnAbstract

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

33.32%

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

19.61%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

9.29%

CLASS A

Risk/Return:

rr_RiskReturnAbstract

Maximum front-end sales charge (load) imposed on purchases (as a % of the offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

5.50%

Maximum deferred sales charge (load) (as a % of the lesser of the offering price or the redemption price)

rr_MaximumDeferredSalesChargeOverOther

none

Redemption Fee (as a percentage of Amount Redeemed)

rr_RedemptionFeeOverRedemption

(1.00%)

Exchange fee

rr_ExchangeFeeOverRedemption

none

Management fees

rr_ManagementFeesOverAssets

0.70%

Distribution and/or service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Other expenses (includes administration fee of 0.10%)

rr_OtherExpensesOverAssets

0.33%

Acquired fund fees and expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.06%

^[1]

Total annual fund operating expenses

rr_ExpensesOverAssets

1.34%

Fee Waiver or Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

^[2]

Total annual fund operating expenses after fee waiver and/or expense reimbursements

rr_NetExpensesOverAssets

1.34%

^[2]

Expense Breakpoint Discounts [Text]

rr_ExpenseBreakpointDiscounts

You may qualify for sales charge discounts on purchases of Class A shares if you or your family invest, or agree to invest in the future, at least $50,000 in the UBS family of funds.

Expense Breakpoint, Minimum Investment Required [Amount]

rr_ExpenseBreakpointMinimumInvestmentRequiredAmount

$ 50,000

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

679

^[3]

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

951

^[3]

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

1,244

^[3]

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

2,074

^[3]

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

27.91%

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

18.31%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

6.97%

Average Annual Returns, Inception Date

rr_AverageAnnualReturnInceptionDate

Nov. 27, 2000

CLASS C

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 lesser of the offering price or the redemption price)

rr_MaximumDeferredSalesChargeOverOther

1.00%

Redemption Fee (as a percentage of Amount Redeemed)

rr_RedemptionFeeOverRedemption

(1.00%)

Exchange fee

rr_ExchangeFeeOverRedemption

none

Management fees

rr_ManagementFeesOverAssets

0.70%

Distribution and/or service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

1.00%

Other expenses (includes administration fee of 0.10%)

rr_OtherExpensesOverAssets

0.33%

Acquired fund fees and expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.06%

^[1]

Total annual fund operating expenses

rr_ExpensesOverAssets

2.09%

Fee Waiver or Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

^[2]

Total annual fund operating expenses after fee waiver and/or expense reimbursements

rr_NetExpensesOverAssets

2.09%

^[2]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

312

^[3]

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

655

^[3]

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

1,124

^[3]

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

2,421

^[3]

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

212

^[3]

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

655

^[3]

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

1,124

^[3]

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

2,421

^[3]

Annual Return 2004

rr_AnnualReturn2004

16.84%

Annual Return 2005

rr_AnnualReturn2005

2.18%

Annual Return 2006

rr_AnnualReturn2006

9.85%

Annual Return 2007

rr_AnnualReturn2007

(3.13%)

Annual Return 2008

rr_AnnualReturn2008

(35.90%)

Annual Return 2009

rr_AnnualReturn2009

34.82%

Annual Return 2010

rr_AnnualReturn2010

22.13%

Annual Return 2011

rr_AnnualReturn2011

(8.96%)

Annual Return 2012

rr_AnnualReturn2012

17.35%

Annual Return 2013

rr_AnnualReturn2013

34.43%

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

33.43%

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

18.78%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

6.77%

Average Annual Returns, Inception Date

rr_AverageAnnualReturnInceptionDate

Nov. 27, 2000

CLASS C | After Taxes on Distributions

Risk/Return:

rr_RiskReturnAbstract

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

28.93%

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

17.98%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

5.58%

CLASS C | After Taxes on Distributions and Sale of Fund Shares

Risk/Return:

rr_RiskReturnAbstract

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

21.72%

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

15.21%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

5.41%

CLASS Y

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 lesser of the offering price or the redemption price)

rr_MaximumDeferredSalesChargeOverOther

none

Redemption Fee (as a percentage of Amount Redeemed)

rr_RedemptionFeeOverRedemption

(1.00%)

Exchange fee

rr_ExchangeFeeOverRedemption

none

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

0.49%

Acquired fund fees and expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.06%

^[1]

Total annual fund operating expenses

rr_ExpensesOverAssets

1.25%

Fee Waiver or Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.03%)

^[2]

Total annual fund operating expenses after fee waiver and/or expense reimbursements

rr_NetExpensesOverAssets

1.22%

^[2]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

124

^[3]

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

394

^[3]

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

683

^[3]

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 1,509

^[3]

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

35.53%

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

19.92%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

7.89%

Average Annual Returns, Inception Date

rr_AverageAnnualReturnInceptionDate

Dec. 20, 2000

[1] Since the "Acquired fund fees and expenses" are not directly borne by the fund, they are not reflected in the fund's financial statements, and therefore the amounts listed in "Total annual fund operating expenses" and "Total annual fund operating expenses after fee waiver and/or expense reimbursements" will differ from those presented in the Financial highlights.

[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 of each class through March 31, 2015 (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 1.41% for Class A, 2.16% for Class C and 1.16% for Class Y. 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 these expense caps. 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.

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

XML

Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

PACE® International 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. You may qualify for sales charge discounts on purchases of Class A shares if you or your family invest, or agree to invest in the future, at least $50,000 in the UBS family of funds. More information about these and other discounts and waivers, as well as eligibility requirements for each share class, is available from your financial advisor and in "Managing your fund account" on page 109 of the prospectus and in "Reduced sales charges, additional purchase, exchange and redemption information and other services" on page 208 of the fund's Statement of Additional Information.

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 36% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

36.00%

Other Expenses, New Fund, Based on Estimates [Text]

rr_OtherExpensesNewFundBasedOnEstimates

These "Dividend expense, borrowing costs and related interest expense attributable to securities sold short" are based on estimates and may vary based on actual investments.

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 unless otherwise stated. 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. The fund invests primarily in stocks of companies that are domiciled in developed foreign countries and principally traded in Japanese, European, Pacific and Australian securities markets or traded in US securities markets. Such investments may include common stocks, which may or may not pay dividends, and securities convertible into common stocks, of companies domiciled outside the US.

The fund may invest, to a limited extent, in (1) stocks of companies in emerging markets, including Asia, Latin America and other regions where markets may not yet fully reflect the potential of the developing economy, and (2) securities of other investment companies that invest in foreign markets and securities convertible into stocks, including convertible bonds that are below investment grade. The fund may, but is not required to, use exchange-traded or over-the-counter derivative instruments for risk management purposes or to attempt to increase total returns. The derivatives in which the fund may invest include currency forward agreements. These derivatives may be used for risk management purposes, such as hedging the fund's currency exposure. In addition, these derivative instruments may be used to obtain or adjust exposure to certain markets.

The fund is also permitted to engage in "short-selling." When selling short, 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 the security to the lender. The fund may also invest the proceeds received upon the initial sale of the security, resulting in leverage and increasing the fund's return and loss potential. Short selling provides opportunities to increase the fund's total returns, but also entails significant potential risks.

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"), Los Angeles Capital Management and Equity Research, Inc. ("Los Angeles Capital") and Chautauqua Capital Management, LLC ("Chautauqua") 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.

Los Angeles Capital employs a "long/short" or "130/30" equity strategy. Los Angeles Capital buys securities "long" that it believes will outperform the market or decrease portfolio risk, and sells securities "short" that it believes will underperform the market. When Los Angeles Capital sells a security short, it may invest the proceeds from that sale in additional securities. (For example, if Los Angeles Capital were responsible for $100 of fund assets, it may take traditional long positions in equity securities with the full $100, borrow and sell short $30 of equity securities, and also invest long the $30 received upon the initial short sale, resulting in long/short equity exposure, as percentages of its assets, of "130/30".) Los Angeles Capital uses a proprietary quantitative model that includes fundamental data inputs for a universe of global equity securities and, through the use of statistical tools, estimates expected returns based on each security's risk characteristics and the expected return to each characteristic in the current market environment. Security weights, both long and short, are assigned through an integrated optimization process which identifies the portfolio with the highest expected return for an acceptable level of risk. Los Angeles Capital also employs monitoring tools and certain additional constraints to ensure compliance with global short sale regulations. Los Angeles Capital seeks to generate incremental investment returns above the fund's benchmark, while attempting to control investment risk relative to the benchmark. While Los Angeles Capital does not set price targets or valuation constraints, it will sell or short sell a security if it no longer has the desired risk characteristics, or if there are concerns about a particular company's merits. Los Angeles Capital closely monitors its short positions and borrowing costs.

Chautauqua endeavors to achieve consistent risk adjusted excess returns by managing a concentrated portfolio of 25-35 quality, growth companies generally headquartered outside of the United States. The portfolio consists of a carefully diversified set of best idea equities that Chautauqua believes will benefit from long-term trends, have sustainable competitive advantages and exhibit growth that should outpace the market. Companies are valued based on a forward looking cash flow analysis. When selecting investments, Chautauqua has a long-term time horizon.

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.

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 declines against the US dollar, the value of the holding decreases 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.

Derivatives risk: The value of "derivatives"—so called because their value "derives" from the value of an underlying asset, reference rate or index—may rise or fall more rapidly than other investments. When using derivatives for non-hedging purposes, it is possible for the fund to lose more than the amount it invested in the derivative. When using derivatives for hedging purposes, the fund's overall returns may be reduced if the hedged investment experiences a favorable price movement. The risks of investing in derivative instruments also include market and management risks. In addition, many types of non-exchange traded derivatives may be subject to liquidity risk, counterparty risk, credit risk and mispricing or valuation complexity. These derivatives risks are different from, and may be greater than, the risks associated with investing directly in securities and other instruments.

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.

Leverage risk associated with financial instruments and practices: The use of financial instruments, including derivatives used for investment (non-hedging) purposes, and the engagement in certain practices, such as the investment of proceeds received in short sales, to increase potential returns may cause the fund to be more volatile than if it had not been leveraged. The use of leverage may also accelerate the velocity of losses and can result in losses to the fund that exceed the amount originally invested.

Short sales risk: There are certain unique risks associated with the use of short sales strategies. When selling a security short, the 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.

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 [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 sales charges of the fund's Class C shares; 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 April 1, 2004. Chautauqua assumed day-to-day management of a separate portion of the fund's assets on August 5, 2013. Los Angeles Capital assumed day-to-day management of another portion of the fund's assets on September 13, 2013. 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. After-tax returns for other classes will vary from the Class C shares' after-tax returns shown.

Performance Information Illustrates Variability of Returns [Text]

rr_PerformanceInformationIllustratesVariabilityOfReturns

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.

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 Equity Investments Annual Total Returns of Class C Shares

Bar Chart Does Not Reflect Sales Loads [Text]

rr_BarChartDoesNotReflectSalesLoads

The bar chart does not reflect the sales charges of the fund's Class C shares; if it did, the total returns shown would be lower.

Bar Chart Closing [Text Block]

rr_BarChartClosingTextBlock

Best quarter during calendar years shown—2Q 2009: 22.47%
Worst quarter during calendar years shown—4Q 2008: (20.26)%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Best quarter during calendar years shown

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Jun. 30, 2009

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

22.47%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Worst quarter during calendar years shown

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Dec. 31, 2008

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(20.26%)

Index No Deduction for Fees, Expenses, Taxes [Text]

rr_IndexNoDeductionForFeesExpensesTaxes

(Index reflects no deduction for fees and expenses.)

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.

Performance Table One Class of after Tax Shown [Text]

rr_PerformanceTableOneClassOfAfterTaxShown

After-tax returns for other classes will vary from the Class C shares' after-tax returns shown.

Caption

rr_AverageAnnualReturnCaption

Average annual total returns (figures reflect sales charges) (for the periods ended December 31, 2013)

MSCI EAFE Index (net) (Index reflects no deduction for fees, expenses or taxes.)

Risk/Return:

rr_RiskReturnAbstract

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

22.78%

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

12.44%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

6.91%

CLASS A

Risk/Return:

rr_RiskReturnAbstract

Maximum front-end sales charge (load) imposed on purchases (as a % of the offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

5.50%

Maximum deferred sales charge (load) (as a % of the lesser of the offering price or the redemption price)

rr_MaximumDeferredSalesChargeOverOther

none

Redemption Fee (as a percentage of Amount Redeemed)

rr_RedemptionFeeOverRedemption

(1.00%)

Exchange fee

rr_ExchangeFeeOverRedemption

none

Management fees

rr_ManagementFeesOverAssets

0.79%

Distribution and/or service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Miscellaneous expenses (includes administration fee of 0.10%)

rr_Component1OtherExpensesOverAssets

0.38%

Dividend expense, borrowing costs and related interest expense attributable to securities sold short

rr_Component2OtherExpensesOverAssets

0.41%

^[1]

Other expenses (includes administration fee of 0.10%)

rr_OtherExpensesOverAssets

0.79%

Total annual fund operating expenses

rr_ExpensesOverAssets

1.83%

Expense Breakpoint Discounts [Text]

rr_ExpenseBreakpointDiscounts

You may qualify for sales charge discounts on purchases of Class A shares if you or your family invest, or agree to invest in the future, at least $50,000 in the UBS family of funds.

Expense Breakpoint, Minimum Investment Required [Amount]

rr_ExpenseBreakpointMinimumInvestmentRequiredAmount

$ 50,000

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

726

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

1,094

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

1,486

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

2,580

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

12.93%

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

9.16%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

5.16%

Average Annual Returns, Inception Date

rr_AverageAnnualReturnInceptionDate

Nov. 27, 2000

CLASS C

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 lesser of the offering price or the redemption price)

rr_MaximumDeferredSalesChargeOverOther

1.00%

Redemption Fee (as a percentage of Amount Redeemed)

rr_RedemptionFeeOverRedemption

(1.00%)

Exchange fee

rr_ExchangeFeeOverRedemption

none

Management fees

rr_ManagementFeesOverAssets

0.79%

Distribution and/or service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

1.00%

Miscellaneous expenses (includes administration fee of 0.10%)

rr_Component1OtherExpensesOverAssets

0.47%

Dividend expense, borrowing costs and related interest expense attributable to securities sold short

rr_Component2OtherExpensesOverAssets

0.41%

^[1]

Other expenses (includes administration fee of 0.10%)

rr_OtherExpensesOverAssets

0.88%

Total annual fund operating expenses

rr_ExpensesOverAssets

2.67%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

370

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

829

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

1,415

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

3,003

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

270

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

829

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

1,415

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

3,003

Annual Return 2004

rr_AnnualReturn2004

17.22%

Annual Return 2005

rr_AnnualReturn2005

12.81%

Annual Return 2006

rr_AnnualReturn2006

26.98%

Annual Return 2007

rr_AnnualReturn2007

9.91%

Annual Return 2008

rr_AnnualReturn2008

(44.49%)

Annual Return 2009

rr_AnnualReturn2009

24.43%

Annual Return 2010

rr_AnnualReturn2010

3.00%

Annual Return 2011

rr_AnnualReturn2011

(10.78%)

Annual Return 2012

rr_AnnualReturn2012

15.95%

Annual Return 2013

rr_AnnualReturn2013

18.58%

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

17.58%

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

9.47%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

4.88%

Average Annual Returns, Inception Date

rr_AverageAnnualReturnInceptionDate

Nov. 27, 2000

CLASS C | After Taxes on Distributions

Risk/Return:

rr_RiskReturnAbstract

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

17.38%

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

9.30%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

4.43%

CLASS C | After Taxes on Distributions and Sale of Fund Shares

Risk/Return:

rr_RiskReturnAbstract

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

10.27%

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

7.62%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

4.22%

CLASS Y

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 lesser of the offering price or the redemption price)

rr_MaximumDeferredSalesChargeOverOther

none

Redemption Fee (as a percentage of Amount Redeemed)

rr_RedemptionFeeOverRedemption

(1.00%)

Exchange fee

rr_ExchangeFeeOverRedemption

none

Management fees

rr_ManagementFeesOverAssets

0.79%

Distribution and/or service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

none

Miscellaneous expenses (includes administration fee of 0.10%)

rr_Component1OtherExpensesOverAssets

0.37%

Dividend expense, borrowing costs and related interest expense attributable to securities sold short

rr_Component2OtherExpensesOverAssets

0.41%

^[1]

Other expenses (includes administration fee of 0.10%)

rr_OtherExpensesOverAssets

0.78%

Total annual fund operating expenses

rr_ExpensesOverAssets

1.57%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

160

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

496

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

855

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 1,867

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

19.91%

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

10.72%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

6.13%

Average Annual Returns, Inception Date

rr_AverageAnnualReturnInceptionDate

Jan. 17, 2001

[1] These "Dividend expense, borrowing costs and related interest expense attributable to securities sold short" are based on estimates and may vary based on actual investments.

XML

Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

PACE® Large Co Value Equity Investments

Objective [Heading]

rr_ObjectiveHeading

Investment objective

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

Capital appreciation and dividend income.

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. You may qualify for sales charge discounts on purchases of Class A shares if you or your family invest, or agree to invest in the future, at least $50,000 in the UBS family of funds. More information about these and other discounts and waivers, as well as eligibility requirements for each share class, is available from your financial advisor and in "Managing your fund account" on page 109 of the prospectus and in "Reduced sales charges, additional purchase, exchange and redemption information and other services" on page 208 of the fund's Statement of Additional Information.

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 71% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

71.00%

Other Expenses, New Fund, Based on Estimates [Text]

rr_OtherExpensesNewFundBasedOnEstimates

These "Dividend expense, borrowing costs and related interest expense attributable to securities sold short" are based on estimates and may vary based on actual investments.

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 unless otherwise stated. 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

The fund invests primarily in stocks of US companies that are believed to be undervalued. 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 issued by large capitalization companies. As of the date of this prospectus, large capitalization companies means companies with a total market capitalization of $3.0 billion or greater at the time of purchase. Effective April 28, 2014, large capitalization companies means companies with a total market capitalization within the market capitalization range of the companies in the Russell 1000^® Value Index at the time of purchase. The fund seeks income primarily from dividend paying stocks.

The fund may invest, to a lesser extent, in other securities, such as securities convertible into stocks, initial public offerings ("IPOs") and stocks of companies with smaller total market capitalizations. The fund may invest up to 20% of its total assets in non-US securities, which may trade either within or outside the US.

The fund is also permitted to engage in "short-selling." When selling short, 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 the security to the lender. The fund may also invest the proceeds received upon the initial sale of the security, resulting in leverage and increasing the fund's return and loss potential. Short selling provides opportunities to increase the fund's total returns, but also entails significant potential risks.

Management process

The fund employs a "manager of managers" structure. The fund's manager, UBS Global Asset Management (Americas) Inc. ("UBS Global AM"), 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. Institutional Capital LLC ("ICAP"), Pzena Investment Management, LLC ("Pzena"), Robeco Investment Management, Inc. ("Robeco") and Los Angeles Capital Management and Equity Research, Inc. ("Los Angeles Capital") 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.

ICAP's investment process involves the use of its proprietary valuation model to identify large capitalization companies that it believes offer the best relative values, and ICAP seeks to avoid companies that are exhibiting excessive deterioration in earnings trends. ICAP focuses on what it believes are the key investment variables (catalysts) that could potentially impact the security's market value. These catalysts are primarily company specific, such as a new product, restructuring or change in management, but occasionally the catalyst can be thematic (e.g., dependent on macroeconomic or industry trends). After a review of stock recommendations, ICAP's portfolio management team determines whether to add the stock to the portfolio or to monitor it for future purchase. ICAP continuously monitors each security and evaluates whether to eliminate it when its price target is achieved, the catalyst becomes inoperative or another stock offers a greater opportunity.

Pzena's strategy follows a disciplined investment process to implement its value philosophy, by focusing exclusively on companies that are underperforming their historically demonstrated earnings power. Pzena applies intensive fundamental research to these companies in an effort to determine whether such underperformance is temporary or permanent. Pzena looks for companies where: (1) the current valuation is low compared to the company's normalized earnings power; (2) current earnings are below historic norms; (3) the problems are temporary; (4) management has a viable strategy to generate earnings recovery; and (5) there is meaningful downside protection in case the earnings recovery does not materialize.

Robeco invests primarily in a diversified portfolio of common stocks of issuers identified as having attractive value characteristics with strong fundamentals. In selecting stocks, Robeco begins with a quantitative analysis that ranks the investment universe based on valuation, momentum and other fundamental factors. Then, Robeco applies fundamental analysis to those securities, considering factors such as price-to-book value and price-to-earnings ratios; high return on invested capital; and positive business momentum, as evidenced by improving trends, rising earnings and/or a catalyst for an improved business outlook. This process results in recommendations and price targets for the selected securities. Robeco constructs the portfolio based on these recommendations and applies certain risk controls, such as diversification among industries and sectors. Robeco establishes a sell discipline for each security in the portfolio based on its target price, and may also sell a security if business fundamentals weaken or if an expected catalyst fails to materialize. Robeco seeks to outperform the fund's benchmark in falling markets and to keep pace with the benchmark in rising markets, while protecting capital.

Los Angeles Capital employs a "long/short" or "130/30" equity strategy. Los Angeles Capital buys securities "long" that it believes will outperform the market or decrease portfolio risk, and sells securities "short" that it believes will underperform the market. When Los Angeles Capital sells a security short, it may invest the proceeds from that sale in additional securities. (For example, if Los Angeles Capital were responsible for $100 of fund assets, it may take traditional long positions in equity securities with the full $100, borrow and sell short $30 of equity securities, and also invest long the $30 received upon the initial short sale, resulting in long/short equity exposure, as percentages of its assets, of "130/30".) Los Angeles Capital uses a proprietary quantitative model that includes fundamental data inputs for a universe of equity securities and, through the use of statistical tools, estimates expected returns based on each security's risk characteristics and the expected return to each characteristic in the current market environment. Security weights, both long and short, are assigned through an integrated optimization process which identifies the portfolio with the highest expected return for an acceptable level of risk. Los Angeles Capital seeks to generate incremental investment returns above the fund's benchmark, while attempting to control investment risk relative to the benchmark. While Los Angeles Capital does not set price targets or valuation constraints, it will sell or short sell a security if it no longer has the desired risk characteristics, or if there are concerns about a particular company's merits. Los Angeles Capital closely monitors its short positions and borrowing costs.

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.

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.

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.

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.

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.

Leverage risk associated with financial instruments and practices: The use of certain financial instruments, including derivatives used for investment (non-hedging) purposes, and the engagement in certain practices, such as the investment of proceeds received in connection with short sales, to increase potential returns may cause the fund to be more volatile than if it had not been leveraged. The use of leverage may also accelerate the velocity of losses and can result in losses to the fund that exceed the amount originally invested.

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. The risks associated with short sales increase when the fund invests the proceeds received upon the initial sale of the security, because the fund can suffer losses on both the short position and the long position established with the short sale proceeds. 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.

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 sales charges of the fund's Class C shares; 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. ICAP assumed day-to-day management of a portion of the fund's assets on July 1, 2000. Pzena assumed day-to-day management of another portion of the fund's assets on May 27, 2008. Robeco assumed day-to-day management of a separate portion of the fund's assets on May 29, 2013. Los Angeles Capital assumed day-to-day management of a separate portion of the fund's assets on September 11, 2013. 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. After-tax returns for other classes will vary from the Class C shares' after-tax returns shown.

Performance Information Illustrates Variability of Returns [Text]

rr_PerformanceInformationIllustratesVariabilityOfReturns

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.

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 Large Co Value Equity Investments Annual Total Returns of Class C Shares

Bar Chart Does Not Reflect Sales Loads [Text]

rr_BarChartDoesNotReflectSalesLoads

The bar chart does not reflect the sales charges of the fund's Class C shares; if it did, the total returns shown would be lower.

Bar Chart Closing [Text Block]

rr_BarChartClosingTextBlock

Best quarter during calendar years shown—2Q 2009: 18.27%
Worst quarter during calendar years shown—4Q 2008: (22.79)%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Best quarter during calendar years shown

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Jun. 30, 2009

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

18.27%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Worst quarter during calendar years shown

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Dec. 31, 2008

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(22.79%)

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.

Performance Table One Class of after Tax Shown [Text]

rr_PerformanceTableOneClassOfAfterTaxShown

After-tax returns for other classes will vary from the Class C shares' after-tax returns shown.

Caption

rr_AverageAnnualReturnCaption

Average annual total returns (figures reflect sales charges) (for the periods ended December 31, 2013)

Russell 1000 Value Index (Index reflects no deduction for fees, expenses or taxes.)

Risk/Return:

rr_RiskReturnAbstract

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

32.53%

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

16.67%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

7.59%

CLASS A

Risk/Return:

rr_RiskReturnAbstract

Maximum front-end sales charge (load) imposed on purchases (as a % of the offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

5.50%

Maximum deferred sales charge (load) (as a % of the lesser of the offering price or the redemption price)

rr_MaximumDeferredSalesChargeOverOther

none

Redemption Fee (as a percentage of Amount Redeemed)

rr_RedemptionFeeOverRedemption

(1.00%)

Exchange fee

rr_ExchangeFeeOverRedemption

none

Management fees

rr_ManagementFeesOverAssets

0.65%

Distribution and/or service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Miscellaneous expenses (includes administration fee of 0.10%)

rr_Component1OtherExpensesOverAssets

0.26%

Dividend expense, borrowing costs and related interest expense attributable to securities sold short

rr_Component2OtherExpensesOverAssets

0.11%

^[1]

Other expenses (includes administration fee of 0.10%)

rr_OtherExpensesOverAssets

0.37%

Total annual fund operating expenses

rr_ExpensesOverAssets

1.27%

Expense Breakpoint Discounts [Text]

rr_ExpenseBreakpointDiscounts

You may qualify for sales charge discounts on purchases of Class A shares if you or your family invest, or agree to invest in the future, at least $50,000 in the UBS family of funds.

Expense Breakpoint, Minimum Investment Required [Amount]

rr_ExpenseBreakpointMinimumInvestmentRequiredAmount

$ 50,000

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

672

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

931

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

1,209

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

2,000

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

27.42%

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

15.94%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

6.84%

Average Annual Returns, Inception Date

rr_AverageAnnualReturnInceptionDate

Nov. 27, 2000

CLASS C

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 lesser of the offering price or the redemption price)

rr_MaximumDeferredSalesChargeOverOther

1.00%

Redemption Fee (as a percentage of Amount Redeemed)

rr_RedemptionFeeOverRedemption

(1.00%)

Exchange fee

rr_ExchangeFeeOverRedemption

none

Management fees

rr_ManagementFeesOverAssets

0.65%

Distribution and/or service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

1.00%

Miscellaneous expenses (includes administration fee of 0.10%)

rr_Component1OtherExpensesOverAssets

0.30%

Dividend expense, borrowing costs and related interest expense attributable to securities sold short

rr_Component2OtherExpensesOverAssets

0.11%

^[1]

Other expenses (includes administration fee of 0.10%)

rr_OtherExpensesOverAssets

0.41%

Total annual fund operating expenses

rr_ExpensesOverAssets

2.06%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

309

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

646

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

1,108

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

2,390

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

209

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

646

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

1,108

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

2,390

Annual Return 2004

rr_AnnualReturn2004

11.98%

Annual Return 2005

rr_AnnualReturn2005

9.52%

Annual Return 2006

rr_AnnualReturn2006

17.70%

Annual Return 2007

rr_AnnualReturn2007

3.53%

Annual Return 2008

rr_AnnualReturn2008

(40.48%)

Annual Return 2009

rr_AnnualReturn2009

25.92%

Annual Return 2010

rr_AnnualReturn2010

14.12%

Annual Return 2011

rr_AnnualReturn2011

(3.27%)

Annual Return 2012

rr_AnnualReturn2012

14.55%

Annual Return 2013

rr_AnnualReturn2013

33.78%

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

32.78%

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

16.33%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

6.60%

Average Annual Returns, Inception Date

rr_AverageAnnualReturnInceptionDate

Nov. 27, 2000

CLASS C | After Taxes on Distributions

Risk/Return:

rr_RiskReturnAbstract

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

32.36%

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

16.22%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

6.04%

CLASS C | After Taxes on Distributions and Sale of Fund Shares

Risk/Return:

rr_RiskReturnAbstract

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

18.88%

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

13.23%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

5.36%

CLASS Y

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 lesser of the offering price or the redemption price)

rr_MaximumDeferredSalesChargeOverOther

none

Redemption Fee (as a percentage of Amount Redeemed)

rr_RedemptionFeeOverRedemption

(1.00%)

Exchange fee

rr_ExchangeFeeOverRedemption

none

Management fees

rr_ManagementFeesOverAssets

0.65%

Distribution and/or service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

none

Miscellaneous expenses (includes administration fee of 0.10%)

rr_Component1OtherExpensesOverAssets

0.27%

Dividend expense, borrowing costs and related interest expense attributable to securities sold short

rr_Component2OtherExpensesOverAssets

0.11%

^[1]

Other expenses (includes administration fee of 0.10%)

rr_OtherExpensesOverAssets

0.38%

Total annual fund operating expenses

rr_ExpensesOverAssets

1.03%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

105

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

328

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

569

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 1,259

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

35.15%

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

17.59%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

7.78%

Average Annual Returns, Inception Date

rr_AverageAnnualReturnInceptionDate

Jan. 19, 2001

[1] These "Dividend expense, borrowing costs and related interest expense attributable to securities sold short" are based on estimates and may vary based on actual investments.

XML

Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

PACE® Intermediate Fixed Income Investments

Objective [Heading]

rr_ObjectiveHeading

Investment objective

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

Current income, consistent with reasonable stability of principal.

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)

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 lesser of the offering price or the redemption price)

rr_MaximumDeferredSalesChargeOverOther

none

Redemption Fee (as a percentage of Amount Redeemed)

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%

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)

Management fees

rr_ManagementFeesOverAssets

0.43%

Distribution and/or service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

none

Other expenses (includes administration fee of 0.10%)

rr_OtherExpensesOverAssets

0.31%

Total annual fund operating expenses

rr_ExpensesOverAssets

0.74%

Fee Waiver or Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.06%)

^[1]

Total annual fund operating expenses after fee waiver and/or expense reimbursements

rr_NetExpensesOverAssets

0.68%

^[1]

Fee Waiver or Reimbursement over Assets, Date of Termination

rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination

2015-03-31

Portfolio Turnover [Heading]

rr_PortfolioTurnoverHeading

Portfolio turnover

Portfolio Turnover [Text Block]

rr_PortfolioTurnoverTextBlock

The fund pays transaction costs, such as commissions or dealer spreads, 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 818% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

818.00%

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:

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 271

^[2]

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

845

^[2]

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

1,444

^[2]

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 3,066

^[2]

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 fixed income securities. Such investments may include US government and foreign government bonds (including bonds issued by supranational and quasi-governmental entities and mortgage-backed securities) and corporate bonds (including mortgage- and asset-backed securities of private issuers, Eurodollar certificates of deposit, Eurodollar bonds and Yankee bonds). There are different types of US government securities, including those issued or guaranteed by the US government, its agencies and its instrumentalities, and they have different types of government support. Some are supported by the full faith and credit of the US, while others are supported by (1) the ability of the issuer to borrow from the US Treasury; (2) the credit of the issuing agency, instrumentality or government-sponsored entity; (3) pools of assets, such as mortgages; or (4) the US government in some other way.

The fund may invest in bonds that are investment grade at the time of purchase. The fund may also invest, in the aggregate, up to 20% of its total assets (measured at the time of purchase) in (1) bonds that are below investment grade at the time of purchase (or unrated bonds of equivalent quality) (commonly known as "junk bonds"), (2) non-US dollar denominated securities, and (3) fixed income securities of issuers located in emerging markets. The fund may also invest in preferred stocks.

The fund invests in bonds of varying maturities, but normally maintains a dollar-weighted average maturity of approximately three to ten years. It normally limits its overall portfolio "duration" to within +/- 50% of the duration of the Barclays US Intermediate Government/Credit Index, as calculated by the investment advisor, which as of December 31, 2013 was approximately 3.21 years. Duration is a measure of the fund's exposure to interest rate risk—a longer duration means that changes in market interest rates are likely to have a larger effect on the value of the fund's portfolio.

The fund may invest in "to be announced" or "TBA" securities, which are mortgage-backed securities that usually are traded on a forward commitment basis with an approximate principal amount and no defined maturity date, issued or guaranteed by US government agencies and instrumentalities. The fund also may engage in TBA and Treasury "roll" transactions. A TBA roll transaction is a strategy whereby the investment advisor decides to sell one TBA security and buy another TBA security due at a later date (Treasury roll transactions differ in that the underlying securities are US Treasury securities).

The fund may, but is not required to, use exchange-traded or over-the-counter derivative instruments for risk management purposes or to attempt to increase total returns. The derivatives in which the fund may invest include options (on swap agreements), futures (on securities or interest rate futures) and swap agreements (specifically, interest rate swaps). These derivatives may be used for risk management purposes, such as managing the risk profile of the fund. In addition, the derivative instruments listed above may be used to enhance returns or in place of direct investments. Futures, swaps and swaptions also be used to adjust the fund's portfolio duration.

The fund's investment strategies may result in high portfolio turnover.

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. BlackRock Financial Management, Inc. ("BlackRock") currently serves as the fund's investment advisor. BlackRock decides to buy specific bonds for the fund based on its credit analysis and review. BlackRock seeks to add value by controlling portfolio duration within a narrow band relative to the Barclays US Intermediate Government/Credit Index. BlackRock uses an analytical process that involves evaluating macroeconomics trends, technical market factors, yield curve exposure and market volatility.

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:

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.

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.

Prepayment risk: The fund's mortgage- and asset-backed securities may be prepaid more rapidly than expected, especially when interest rates are falling, and the fund may have to reinvest those prepayments at lower interest rates. When interest rates are rising, slower prepayments may extend the duration of the securities and may reduce their value.

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.

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 markets 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.

Derivatives risk: The value of "derivatives"—so called because their value "derives" from the value of an underlying asset, reference rate or index—may rise or fall more rapidly than other investments. When using derivatives for non-hedging purposes, it is possible for the fund to lose more than the amount it invested in the derivative. When using derivatives for hedging purposes, the fund's overall returns may be reduced if the hedged investment experiences a favorable price movement. The risks of investing in derivative instruments also include market and management risks. Derivatives relating to fixed income markets are especially susceptible to interest rate risk and credit risk. In addition, many types of swaps and other non-exchange traded derivatives may be subject to liquidity risk, counterparty risk, credit risk and mispricing or valuation complexity. These derivatives risks are different from, and may be greater than, the risks associated with investing directly in securities and other instruments.

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.

US Government securities risk: There are different types of US government securities with different levels of credit risk, including the risk of default, depending on the nature of the particular government support for that security. For example, a US government-sponsored entity, such as Federal National Mortgage Association ("Fannie Mae") or Federal Home Loan Mortgage Corporation ("Freddie Mac"), although chartered or sponsored by an Act of Congress, may issue securities that are neither insured nor guaranteed by the US Treasury and are therefore riskier than those that are.

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.

High yield securities ("junk bonds") risk: Lower-rated securities (the issuers of which are typically in poor financial health) are subject to higher risks than investment grade securities. For example, lower-rated securities may be (1) subject to a greater risk of loss of principal and non-payment of interest (including default by the issuer); (2) subject to greater price volatility; and (3) less liquid than investment grade securities. The prices of such securities may be more vulnerable to bad economic news, or even the expectation of bad news, than higher rated fixed income securities.

Swap agreement risk: The fund may enter into various types of swap agreements. Swap agreements can be less liquid and more difficult to value than other investments. Because its cash flows are based in part on changes in the value of the reference asset, a total return swap's market value will vary with changes in that reference asset. In addition, the fund may experience delays in payment or loss of income if the counterparty fails to perform under the contract.

Management risk: The risk that the investment strategies, techniques and risk analyses employed by the investment advisor may not produce the desired results.

Leverage risk associated with financial instruments: The use of financial instruments to increase potential returns may cause the fund to be more volatile than if it had not been leveraged. The use of leverage may also accelerate the velocity of losses and can result in losses to the fund that exceed the amount originally invested.

Mortgage-related securities risk: Mortgage-related securities are subject to risks that are different from and/or more acute than risks associated with other types of debt instruments. Such risks may include prepayment risk, as discussed above. Conversely, in periods of rising interest rates, the fund may be subject to ex- tension risk, and may receive principal later than expected, causing additional volatility. During periods of difficult or frozen credit markets, significant changes in interest rates, or deteriorating economic conditions, such securities may decline in value, face valuation difficulties, become more volatile and become illiquid. Certain types of mortgage-backed securities (e.g., CMOs and stripped mortgage-backed securities) can be even more volatile and may be more sensitive to the rate of prepayments than other mortgage-related securities. The risk of default for "sub-prime" mortgages is generally higher than other types of mortgage-backed securities. The structure of some of these securities may be complex, and there may be less available information than other types of debt securities.

Risk Lose Money [Text]

rr_RiskLoseMoney

You may lose money by investing in the fund.

Risk Nondiversified Status [Text]

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 [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. 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 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.

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 Intermediate Fixed Income 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.

Annual Return 2004

rr_AnnualReturn2004

2.75%

Annual Return 2005

rr_AnnualReturn2005

1.33%

Annual Return 2006

rr_AnnualReturn2006

3.95%

Annual Return 2007

rr_AnnualReturn2007

7.43%

Annual Return 2008

rr_AnnualReturn2008

(1.29%)

Annual Return 2009

rr_AnnualReturn2009

9.50%

Annual Return 2010

rr_AnnualReturn2010

5.44%

Annual Return 2011

rr_AnnualReturn2011

4.59%

Annual Return 2012

rr_AnnualReturn2012

3.97%

Annual Return 2013

rr_AnnualReturn2013

(0.90%)

Bar Chart Closing [Text Block]

rr_BarChartClosingTextBlock

Best quarter during calendar years shown—3Q 2009: 3.91%
Worst quarter during calendar years shown—3Q 2008: (3.69)%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Best quarter during calendar years shown

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Sep. 30, 2009

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

3.91%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Worst quarter during calendar years shown

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Sep. 30, 2008

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(3.69%)

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 (figures reflect 2% PACE Select Advisors Program Fee) (for the periods ended December 31, 2013)

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

(2.87%)

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

2.40%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

1.57%

Average Annual Returns, Inception Date

rr_AverageAnnualReturnInceptionDate

Aug. 24, 1995

After Taxes on Distributions

Risk/Return:

rr_RiskReturnAbstract

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

(3.37%)

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

1.50%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

0.46%

After Taxes on Distributions and Sale of Fund Shares

Risk/Return:

rr_RiskReturnAbstract

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

(1.62%)

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

1.53%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

0.81%

Barclays US Intermediate Government/Credit Index (Index reflects no deduction for fees, expenses or taxes.)

Risk/Return:

rr_RiskReturnAbstract

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

(0.86%)

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

3.96%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

4.09%

[1] 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 March 31, 2015 (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 0.68%. 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.

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

XML

Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

PACE® Municipal Fixed Income Investments

Objective [Heading]

rr_ObjectiveHeading

Investment objective

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

High current income exempt from federal income tax.

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)

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 lesser of the offering price or the redemption price)

rr_MaximumDeferredSalesChargeOverOther

none

Redemption Fee (as a percentage of Amount Redeemed)

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%

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)

Management fees

rr_ManagementFeesOverAssets

0.44%

Distribution and/or service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

none

Other expenses (includes administration fee of 0.10%)

rr_OtherExpensesOverAssets

0.26%

Total annual fund operating expenses

rr_ExpensesOverAssets

0.70%

Fee Waiver or Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.05%)

^[1]

Total annual fund operating expenses after fee waiver and/or expense reimbursements

rr_NetExpensesOverAssets

0.65%

^[1]

Fee Waiver or Reimbursement over Assets, Date of Termination

rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination

2015-03-31

Portfolio Turnover [Heading]

rr_PortfolioTurnoverHeading

Portfolio turnover

Portfolio Turnover [Text Block]

rr_PortfolioTurnoverTextBlock

The fund pays transaction costs, such as commissions or dealer spreads, 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 69% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

69.00%

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:

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 268

^[2]

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

834

^[2]

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

1,425

^[2]

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 3,028

^[2]

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 municipal fixed income investments, the income from which is exempt from regular federal income taxes. The fund invests principally in investment grade municipal bonds of varying maturities. Normally, the fund limits its investments in municipal bonds that are subject to the federal alternative minimum tax ("AMT") so that not more than 25% of its interest income will be subject to the AMT, and invests in these bonds when its investment advisor believes that they offer attractive yields relative to similar municipal bonds that are not subject to the AMT.

The fund normally limits its portfolio "duration" to between three and seven years. Duration is a measure of the fund's exposure to interest rate risk—a longer duration means that changes in market interest rates are likely to have a larger effect on the value of the fund's portfolio.

The fund may invest up to 50% of its total assets in municipal bonds that are secured by revenues from public housing authorities and state and local housing finance authorities, including bonds that are secured or backed by the US Treasury or other US government guaranteed securities. There are different types of US government securities, including those issued or guaranteed by the US government, its agencies and its instrumentalities, and they have different types of government support. Some are supported by the full faith and credit of the US, while others are supported by (1) the ability of the issuer to borrow from the US Treasury; (2) the credit of the issuing agency, instrumentality or government-sponsored entity; (3) pools of assets, such as mortgages; or (4) the US government in some other way.

The fund limits its investments in municipal bonds with the lowest investment grade rating (or unrated bonds of equivalent quality) to 15% of its total assets at the time the bonds are purchased.

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. Standish Mellon Asset Management Company LLC ("Standish") currently serves as the fund's investment advisor. In deciding which securities to buy for the fund, Standish seeks to identify undervalued sectors or geographical regions of the municipal market or undervalued individual securities, by using credit research and valuation analysis and monitoring the relationship of the municipal yield curve to the treasury yield curve. Standish also uses credit quality assessments from its in-house analysts to identify potential rating changes, undervalued issues and macro trends with regard to market sectors and geographical regions. Standish may make modest duration adjustments based on economic analyses and interest rate forecasts. Standish generally sells securities (1) if it identifies more attractive investment opportunities within its investment criteria; (2) with weakening credit profiles; or (3) to adjust the average duration of the fund's portfolio.

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:

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.

Municipal securities risk: Municipal securities are subject to interest rate and credit risks. The ability of a municipal issuer to make payments and the value of municipal securities can be affected by uncertainties in the municipal securities market. Such uncertainties could cause increased volatility in the municipal securities market and could negatively impact the fund's net asset value and/or the distributions paid by the fund. Municipal bonds secured by revenues from public housing authorities may be subject to additional uncertainties relating to the possibility that proceeds may exceed supply of available mortgages to be purchased by public housing authorities, resulting in early retirement of bonds, or that homeowner repayments will create an irregular cash flow. Municipalities continue to experience difficulties in the current economic and political environment.

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.

Related securities concentration risk: Because the fund may invest more than 25% of its total assets in municipal bonds that are issued to finance similar projects, changes that affect one type of municipal bond may have a significant impact on the value of the fund.

US Government securities risk: There are different types of US government securities with different levels of credit risk, including the risk of default, depending on the nature of the particular government support for that security. For example, a US government-sponsored entity, such as Federal National Mortgage Association ("Fannie Mae") or Federal Home Loan Mortgage Corporation ("Freddie Mac"), although chartered or sponsored by an Act of Congress, may issue securities that are neither insured nor guaranteed by the US Treasury and are therefore riskier than those that are.

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.

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.

Management risk: The risk that the investment strategies, techniques and risk analyses employed by the investment advisor may not produce the desired results.

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. 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 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.

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 Municipal Fixed Income 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.

Annual Return 2004

rr_AnnualReturn2004

2.33%

Annual Return 2005

rr_AnnualReturn2005

0.99%

Annual Return 2006

rr_AnnualReturn2006

3.25%

Annual Return 2007

rr_AnnualReturn2007

3.42%

Annual Return 2008

rr_AnnualReturn2008

(0.15%)

Annual Return 2009

rr_AnnualReturn2009

10.13%

Annual Return 2010

rr_AnnualReturn2010

2.72%

Annual Return 2011

rr_AnnualReturn2011

9.78%

Annual Return 2012

rr_AnnualReturn2012

4.29%

Annual Return 2013

rr_AnnualReturn2013

(1.62%)

Bar Chart Closing [Text Block]

rr_BarChartClosingTextBlock

Best quarter during calendar years shown—3Q 2009: 6.13%
Worst quarter during calendar years shown—4Q 2010: (3.13)%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Best quarter during calendar years shown

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Sep. 30, 2009

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

6.13%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Worst quarter during calendar years shown

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Dec. 31, 2010

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(3.13%)

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 (figures reflect 2% PACE Select Advisors Program Fee) (for the periods ended December 31, 2013)

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

(3.57%)

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

2.89%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

1.40%

Average Annual Returns, Inception Date

rr_AverageAnnualReturnInceptionDate

Aug. 24, 1995

After Taxes on Distributions

Risk/Return:

rr_RiskReturnAbstract

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

(3.75%)

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

2.84%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

1.38%

After Taxes on Distributions and Sale of Fund Shares

Risk/Return:

rr_RiskReturnAbstract

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

(0.73%)

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

2.99%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

1.81%

Barclays US Municipal 3-15 Year Blend Index (Index reflects no deduction for fees, expenses or taxes.)

Risk/Return:

rr_RiskReturnAbstract

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

(1.24%)

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

5.15%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

4.26%

[1] 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 March 31, 2015 (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 0.65%. 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.

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

XML

Class P Prospectus | PACE® International Emerging Markets Equity Investments | Class P

PACE® International Emerging Markets Equity Investments

Investment objective

Capital appreciation.

Fees and expenses of the fund

These tables describe the fees and expenses that you may pay if you buy and hold shares of the fund.

Shareholder fees (fees paid directly from your investment)

Shareholder Fees	Class P Prospectus PACE® International Emerging Markets Equity Investments Class P
Maximum front-end sales charge (load) imposed on purchases (as a % of the offering price)	none
Maximum deferred sales charge (load) (as a % of the offering price)	none
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)	2.00%
Redemption fee (as a % of the amount redeemed within 90 days of purchase, if applicable)	1.00%

Annual fund operating expenses (expenses that you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses		Class P Prospectus PACE® International Emerging Markets Equity Investments Class P
Management fees		1.00%
Distribution and/or service (12b-1) fees		none
Other expenses (includes administration fee of 0.10%)		0.75%
Acquired fund fees and expenses	[1]	0.07%
Total annual fund operating expenses		1.82%
Management fee waiver/expense reimbursements	[2]	0.05%
Total annual fund operating expenses after fee waiver and/ or expense reimbursements	[2]	1.77%

Example

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:

Expense Example (USD $)		1 year	3 years	5 years	10 years
Class P Prospectus PACE® International Emerging Markets Equity Investments Class P	[1]	379	1,162	1,963	4,050

Portfolio turnover

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 158% of the average value of its portfolio.

Principal strategies

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.

The fund's investment strategies may result in high portfolio turnover.

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 ("LMCG") 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").

LMCG uses a bottom-up quantitative approach to investing in emerging markets equity securities. Inefficiencies in the market create opportunities, and LMCG 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. LMCG'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 LMCG 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.

Principal risks

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 securi- ties 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.

High yield securities ("junk bonds") risk: Lower-rated securities (the issuers of which are typically in poor financial health) are subject to higher risks than investment grade securities. For example, lower-rated securities may be (1) subject to a greater risk of loss of principal and non-payment of interest (including default by the issuer); (2) subject to greater price volatility; and (3) less liquid than investment grade securities. The prices of such securities may be more vulnerable to bad economic news, or even the expectation of bad news, than higher rated fixed income securities.

Performance

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. LMCG 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 situa- tion 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.

PACE International Emerging Markets Equity Investments Annual Total Returns of Class P Shares

Best quarter during calendar years shown—2Q 2009: 31.65%
Worst quarter during calendar years shown—4Q 2008: (28.35)%

Average annual total returns (figures reflect 2% PACE Select Advisors Program Fee) (for the periods ended December 31, 2013)

Average Annual Returns Class P Prospectus PACE® International Emerging Markets Equity Investments	Average Annual Returns, 1 Year	Average Annual Returns, 5 Years	Average Annual Returns, 10 Years	Average Annual Returns, Inception Date
Class P	(6.75%)	10.41%	6.90%	Aug. 24, 1995
Class P After Taxes on Distributions	(6.66%)	10.45%	5.84%
Class P After Taxes on Distributions and Sale of Fund Shares	(3.51%)	8.62%	6.04%
Class P MSCI Emerging Markets Index (Index reflects no deduction for fees, expenses or taxes.)	(2.27%)	15.15%	11.52%

[1] Since the "Acquired fund fees and expenses" are not directly borne by the fund, they are not reflected in the fund's financial statements, and therefore the amounts listed in "Total annual fund operating expenses" and "Total annual fund operating expenses after fee waiver and/or expense reimbursements" will differ from those presented in the Financial highlights.

[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 March 31, 2015 (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 1.70%. 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.

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

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Class P Prospectus | PACE® International Fixed Income Investments | Class P

PACE® International Fixed Income Investments

Investment objective

High total return.

Fees and expenses of the fund

These tables describe the fees and expenses that you may pay if you buy and hold shares of the fund.

Shareholder fees (fees paid directly from your investment)

Shareholder Fees	Class P Prospectus PACE® International Fixed Income Investments Class P
Maximum front-end sales charge (load) imposed on purchases (as a % of the offering price)	none
Maximum deferred sales charge (load) (as a % of the offering price)	none
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)	2.00%
Redemption fee (as a % of the amount redeemed within 90 days of purchase, if applicable)	1.00%

Annual fund operating expenses (expenses that you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses		Class P Prospectus PACE® International Fixed Income Investments Class P
Management fees		0.65%
Distribution and/or service (12b-1) fees		none
Other expenses (includes administration fee of 0.10%)		0.45%
Total annual fund operating expenses		1.10%
Management fee waiver/expense reimbursements	[1]	0.10%
Total annual fund operating expenses after fee waiver and/or expense reimbursements	[1]	1.00%

Example

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:

Expense Example (USD $)		1 year	3 years	5 years	10 years
Class P Prospectus PACE® International Fixed Income Investments Class P	[1]	303	947	1,617	3,404

Portfolio turnover

The fund pays transaction costs, such as commissions or dealer spreads, 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 63% of the average value of its portfolio.

Principal strategies

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 fixed income securities. Such investments may include non-US government bonds (including bonds issued by supranational organizations and quasi-governmental entities), US government bonds, and bonds of US or non-US private issuers. While the fund may invest in US fixed income securities, it expects to invest mainly in non-US fixed income securities under normal circumstances. The fund invests primarily in high-grade bonds of governmental and private issuers in developed countries. These high-grade bonds are rated in one of the three highest rating categories or are of comparable quality. The fund invests, to a limited extent, in emerging market bonds and lower rated bonds of governmental and private issuers, including bonds that are rated below investment grade (commonly known as "junk bonds").

The fund invests in bonds of varying maturities, but normally limits its portfolio "duration" to between four and eight years. Duration is a measure of the fund's exposure to interest rate risk—a longer duration means that changes in market interest rates are likely to have a larger effect on the value of the fund's portfolio.

The fund's investments may include mortgage- and asset-backed securities. The fund may, but is not required to, use exchange-traded or over-the-counter derivative instruments for risk management purposes or to attempt to increase total returns. The derivatives in which the fund may invest include currency forward agreements. These derivatives may be used for risk management purposes, such as hedging the fund's currency exposure, or otherwise managing the risk profile of the fund. In addition, these derivative instruments may be used to enhance returns; in place of direct investments; or to obtain or adjust exposure to certain markets.

There are different types of US government securities, including those issued or guaranteed by the US government, its agencies and its instrumentalities, and they have different types of government support. Some are supported by the full faith and credit of the US, while others are supported by (1) the ability of the issuer to borrow from the US Treasury; (2) the credit of the issuing agency, instrumentality or government-sponsored entity; (3) pools of assets, such as mortgages; or (4) the US government in some other way.

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. Rogge Global Partners plc ("Rogge Global Partners") currently serves as the fund's investment advisor. Rogge Global Partners seeks to invest in bonds of financially healthy entities because it believes that these investments produce the highest bond and currency returns over time. In deciding which bonds to buy for the fund, Rogge Global Partners uses a top-down analysis to find value across countries and to forecast interest and currency-exchange rates over a one-year horizon in those coun- tries, and an optimization model to help determine country, currency and duration positions for the fund. Rogge Global Partners generally sells securities (1) that no longer meet these selection criteria; (2) when it identifies more attractive investment opportunities; or (3) to adjust the average duration of the fund assets it manages. Rogge Global Partners may hedge the fund's exposure to foreign currencies to varying degrees as it deems appropriate.

Principal risks

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:

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.

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.

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.

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 is- suers 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.

Prepayment risk: The fund's mortgage- and asset-backed securities may be prepaid more rapidly than expected, especially when interest rates are falling, and the fund may have to reinvest those prepayments at lower interest rates. When interest rates are rising, slower prepayments may extend the duration of the securities and may reduce their value.

Derivatives risk: The value of "derivatives"—so called because their value "derives" from the value of an underlying asset, reference rate or index—may rise or fall more rapidly than other investments. When using derivatives for non-hedging purposes, it is possible for the fund to lose more than the amount it invested in the derivative. When using derivatives for hedging purposes, the fund's overall returns may be reduced if the hedged investment experiences a favorable price movement. The risks of investing in derivative instruments also include market and management risks. Derivatives relating to fixed income markets are especially susceptible to interest rate risk and credit risk. In addition, many types of non-exchange traded derivatives may be subject to liquidity risk, counterparty risk, credit risk and mispricing or valuation complexity. These derivatives risks are different from, and may be greater than, the risks associated with investing directly in securities and other instruments.

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.

US Government securities risk: There are different types of US government securities with different levels of credit risk, including the risk of default, depending on the nature of the particular government support for that security. For example, a US government-sponsored entity, such as Federal National Mortgage Association ("Fannie Mae") or Federal Home Loan Mortgage Corporation ("Freddie Mac"), although chartered or sponsored by an Act of Congress, may issue securities that are neither insured nor guaranteed by the US Treasury and are therefore riskier than those that are.

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.

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.

High yield securities ("junk bonds") risk: Lower-rated securities (the issuers of which are typically in poor financial health) are subject to higher risks than investment grade securities. For example, lower-rated securities may be (1) subject to a greater risk of loss of principal and non-payment of interest (including default by the issuer); (2) subject to greater price volatility; and (3) less liquid than investment grade securities. The prices of such securities may be more vulnerable to bad economic news, or even the expectation of bad news, than higher rated fixed income securities.

Management risk: The risk that the investment strategies, techniques and risk analyses employed by the investment advisor may not produce the desired results.

Mortgage-related securities risk: Mortgage-related securities are subject to risks that are different from and/or more acute than risks associated with other types of debt instruments. Such risks may include prepayment risk, as discussed above. Conversely, in periods of rising interest rates, the fund may be subject to extension risk, and may receive principal later than expected, causing additional volatility. During periods of difficult or frozen credit markets, significant changes in interest rates, or deteriorating economic conditions, such securities may decline in value, face valuation difficulties, become more volatile and become illiquid. Certain types of mortgage-backed securities (e.g., CMOs and stripped mortgage-backed securities) can be even more volatile and may be more sensitive to the rate of prepayments than other mortgage-related securities. The risk of default for "sub-prime" mortgages is generally higher than other types of mortgage-backed securities. The structure of some of these securities may be complex, and there may be less available information than other types of debt securities.

Performance

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 Barclays Global Aggregate ex USD 50% Hedged Index provides information regarding the effectiveness of the fund's currency hedging policy. 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 between October 10, 2000 and August 22, 2007, when Rogge Global Partners and another investment advisor each was responsible for managing a separate portion of the fund's assets. In addition, prior to December 1, 2005, the fund had been following a strategy of investing in both US and non-US fixed income investments, but effective as of that date, the fund modified its strategy to focus more on non-US fixed income investment opportunities. 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.

PACE International Fixed Income Investments Annual Total Returns of Class P Shares

Best quarter during calendar years shown—3Q 2010: 11.45%
Worst quarter during calendar years shown—3Q 2008: (7.33)%

Average annual total returns (figures reflect 2% PACE Select Advisors Program Fee) (for the periods ended December 31, 2013)

Average Annual Returns Class P Prospectus PACE® International Fixed Income Investments	Average Annual Returns, 1 Year	Average Annual Returns, 5 Years	Average Annual Returns, 10 Years	Average Annual Returns, Inception Date
Class P	(8.00%)	1.27%	1.63%	Aug. 24, 1995
Class P After Taxes on Distributions	(8.46%)	(0.19%)	(0.07%)
Class P After Taxes on Distributions and Sale of Fund Shares	(4.53%)	0.52%	0.70%
Class P Barclays Global Aggregate ex US Index (Indices reflect no deduction for fees, expenses or taxes.)	(3.08%)	3.51%	4.35%
Class P Barclays Global Aggregate ex USD 50% Hedged Index (Indices reflects no deduction for fees, expenses or taxes.)	(0.94%)	3.76%	4.41%

[1] 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: (1) waive its management fees through March 31, 2015 to the extent necessary to reflect the lower sub-advisory fee paid by UBS Global AM to Rogge Global Partners plc, the fund's investment advisor; and (2) waive its management fees and/or reimburse expenses so that the fund's ordinary total operating expenses through March 31, 2015 (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 1.00%. The fund has agreed to repay UBS Global AM for any waived fees/reimbursed expenses (pursuant to item (2)) 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.

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

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Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

PACE® Small/Medium Co Growth 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. You may qualify for sales charge discounts on purchases of Class A shares if you or your family invest, or agree to invest in the future, at least $50,000 in the UBS family of funds. More information about these and other discounts and waivers, as well as eligibility requirements for each share class, is available from your financial advisor and in "Managing your fund account" on page 109 of the prospectus and in "Reduced sales charges, additional purchase, exchange and redemption information and other services" on page 208 of the fund's Statement of Additional Information.

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)

Fee Waiver or Reimbursement over Assets, Date of Termination

rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination

2015-03-31

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 60% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

60.00%

Expense Example [Heading]

rr_ExpenseExampleHeading

Example

Expense Example Narrative [Text Block]

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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 unless otherwise stated. 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

The fund invests primarily in stocks of "emerging growth" companies that are believed to have potential for high future earnings growth relative to the overall market. 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 issued by small/medium capitalization companies. As of the date of this prospectus, small/medium capitalization companies means companies with a total market capitalization of less than $6.0 billion at the time of purchase. Effective April 28, 2014, small/medium capitalization companies means companies with a total market capitalization within the market capitalization range of the companies in the Russell 2500^® Growth Index at the time of purchase. Dividend income is an incidental consideration in the investment advisors' selection of stocks for the fund.

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 healthcare or technology. The fund may invest, to a limited extent, in stocks of companies with larger total market capitalizations and other securities, including securities convertible into stocks. The fund may invest up to 10% of its total assets in non-US securities, which may trade either within or outside the US.

The fund's investment strategies may result in high portfolio turnover.

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. Copper Rock Capital Partners, LLC ("Copper Rock"), Palisade Capital Management, L.L.C. ("Palisade"), Riverbridge Partners, LLC ("Riverbridge"), Lee Munder Capital Group, LLC ("LMCG") and Timpani Capital Management LLC ("Timpani") 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.

Copper Rock employs a fundamental, bottom-up investment approach that focuses on identifying emerging companies that exhibit the potential for strong and sustainable revenue growth over each of the following two years. Copper Rock believes that incremental margin expansion and proven management are key factors that propel a company's growth. Copper Rock will typically hold 70 to 90 equity positions that are diversified across sectors and industries. Copper Rock utilizes a "pure" growth investment style that emphasizes growth and momentum characteristics, and attempts to manage risk by diversifying and understanding its holdings and employing a stringent sell discipline.

Palisade seeks fundamentally strong and dynamic small and mid cap companies that are trading at a discount to their growth rates. Palisade's goal is to ascertain a dynamic of change before it manifests in consensus estimates. Palisade believes that the small and mid cap market is inherently less efficient than the large cap market, and attempts to gain an informational advantage by committing to the labor intensive process of conducting bottom-up fundamental research on small and mid cap companies, as well as their customers, competitors and supply chains. Palisade places heavy emphasis on the effectiveness of a small/mid cap company's management team and seeks direct access to a variety of each company's key decision-makers.

Riverbridge believes that earnings power determines the value of a franchise. Riverbridge focuses on companies that are viewed as building their earnings power and building the intrinsic value of the company over long periods of time. Riverbridge looks to invest in high-quality growth companies that demonstrate the ability to sustain strong secular earnings growth, regardless of overall economic conditions.

LMCG seeks to achieve competitive returns in small/medium capitalization companies by identifying unrecognized growth potential, wherever it exists across all industry sectors. LMCG seeks to identify firms with high quality business models, distinct competitive advantages, proven management teams, and significant growth potential. Revenue growth, margin expansion, and the ability to positively surprise and revise earnings estimates are key characteristics in LMCG's holdings. LMCG seeks to identify firms that have duration and sustainability of these characteristics based on their competitive positions in their respective industries.

Timpani seeks to invest in small cap companies where growth is robust, sustainable and underestimated by the market. Timpani uses fundamental research, focusing on companies that it believes have superior management and whose business models have a high potential for earnings upside. Timpani forms an investment decision based on this research and an assessment of the market's perception of these companies. Timpani may invest in any sector, may emphasize one or more particular sectors and may sell a company's stock when it believes a company's prospects for growth have diminished. Timpani may also sell or reduce a portfolio position when it sees market sentiment turn negative on a stock held in the portfolio.

Risk [Heading]

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Principal risks

Risk Narrative [Text Block]

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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.

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.

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.

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.

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.

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.

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 [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]

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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 sales charges of the fund's Class C shares; 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. Riverbridge assumed day-to-day management of a portion of the fund's assets on October 1, 2005. Copper Rock assumed responsibility for managing a separate portion of the fund's assets on March 1, 2007. Palisade assumed day-to-day management of a separate portion of the fund's assets on February 2, 2009. LMCG and Timpani assumed day-to-day management of a separate portion of the fund's assets on November 25, 2013. 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. After-tax returns for other classes will vary from the Class C shares' after-tax returns shown.

Performance Information Illustrates Variability of Returns [Text]

rr_PerformanceInformationIllustratesVariabilityOfReturns

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.

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]

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PACE Small/Medium Co Growth Equity Investments Annual Total Returns of Class C Shares

Bar Chart Does Not Reflect Sales Loads [Text]

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The bar chart does not reflect the sales charges of the fund's Class C shares; if it did, the total returns shown would be lower.

Bar Chart Closing [Text Block]

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Best quarter during calendar years shown—2Q 2009: 20.34%
Worst quarter during calendar years shown—4Q 2008: (26.48)%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Best quarter during calendar years shown

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Jun. 30, 2009

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

20.34%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Worst quarter during calendar years shown

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Dec. 31, 2008

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(26.48%)

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.

Performance Table One Class of after Tax Shown [Text]

rr_PerformanceTableOneClassOfAfterTaxShown

After-tax returns for other classes will vary from the Class C shares' after-tax returns shown.

Caption

rr_AverageAnnualReturnCaption

Average annual total returns (figures reflect sales charges) (for the periods ended December 31, 2013)

Russell 2500 Growth Index (Index reflects no deduction for fees, expenses or taxes.)

Risk/Return:

rr_RiskReturnAbstract

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

40.65%

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

24.03%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

10.11%

CLASS A

Risk/Return:

rr_RiskReturnAbstract

Maximum front-end sales charge (load) imposed on purchases (as a % of the offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

5.50%

Maximum deferred sales charge (load) (as a % of the lesser of the offering price or the redemption price)

rr_MaximumDeferredSalesChargeOverOther

none

Redemption Fee (as a percentage of Amount Redeemed)

rr_RedemptionFeeOverRedemption

(1.00%)

Exchange fee

rr_ExchangeFeeOverRedemption

none

Management fees

rr_ManagementFeesOverAssets

0.70%

Distribution and/or service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Other expenses (includes administration fee of 0.10%)

rr_OtherExpensesOverAssets

0.31%

Total annual fund operating expenses

rr_ExpensesOverAssets

1.26%

Fee Waiver or Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

^[1]

Total annual fund operating expenses after fee waiver and/or expense reimbursements

rr_NetExpensesOverAssets

1.26%

^[1]

Expense Breakpoint Discounts [Text]

rr_ExpenseBreakpointDiscounts

You may qualify for sales charge discounts on purchases of Class A shares if you or your family invest, or agree to invest in the future, at least $50,000 in the UBS family of funds.

Expense Breakpoint, Minimum Investment Required [Amount]

rr_ExpenseBreakpointMinimumInvestmentRequiredAmount

$ 50,000

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

671

^[2]

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

928

^[2]

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

1,204

^[2]

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,989

^[2]

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

31.17%

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

21.85%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

8.03%

Average Annual Returns, Inception Date

rr_AverageAnnualReturnInceptionDate

Nov. 27, 2000

CLASS C

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 lesser of the offering price or the redemption price)

rr_MaximumDeferredSalesChargeOverOther

1.00%

Redemption Fee (as a percentage of Amount Redeemed)

rr_RedemptionFeeOverRedemption

(1.00%)

Exchange fee

rr_ExchangeFeeOverRedemption

none

Management fees

rr_ManagementFeesOverAssets

0.70%

Distribution and/or service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

1.00%

Other expenses (includes administration fee of 0.10%)

rr_OtherExpensesOverAssets

0.32%

Total annual fund operating expenses

rr_ExpensesOverAssets

2.02%

Fee Waiver or Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

^[1]

Total annual fund operating expenses after fee waiver and/or expense reimbursements

rr_NetExpensesOverAssets

2.02%

^[1]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

305

^[2]

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

634

^[2]

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

1,088

^[2]

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

2,348

^[2]

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

205

^[2]

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

634

^[2]

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

1,088

^[2]

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

2,348

^[2]

Annual Return 2004

rr_AnnualReturn2004

9.86%

Annual Return 2005

rr_AnnualReturn2005

2.23%

Annual Return 2006

rr_AnnualReturn2006

7.56%

Annual Return 2007

rr_AnnualReturn2007

15.09%

Annual Return 2008

rr_AnnualReturn2008

(44.27%)

Annual Return 2009

rr_AnnualReturn2009

38.77%

Annual Return 2010

rr_AnnualReturn2010

27.40%

Annual Return 2011

rr_AnnualReturn2011

(2.91%)

Annual Return 2012

rr_AnnualReturn2012

15.70%

Annual Return 2013

rr_AnnualReturn2013

37.73%

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

36.73%

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

22.29%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

7.80%

Average Annual Returns, Inception Date

rr_AverageAnnualReturnInceptionDate

Nov. 27, 2000

CLASS C | After Taxes on Distributions

Risk/Return:

rr_RiskReturnAbstract

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

31.67%

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

21.29%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

6.67%

CLASS C | After Taxes on Distributions and Sale of Fund Shares

Risk/Return:

rr_RiskReturnAbstract

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

23.84%

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

18.21%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

6.17%

CLASS Y

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 lesser of the offering price or the redemption price)

rr_MaximumDeferredSalesChargeOverOther

none

Redemption Fee (as a percentage of Amount Redeemed)

rr_RedemptionFeeOverRedemption

(1.00%)

Exchange fee

rr_ExchangeFeeOverRedemption

none

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

0.55%

Total annual fund operating expenses

rr_ExpensesOverAssets

1.25%

Fee Waiver or Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.12%)

^[1]

Total annual fund operating expenses after fee waiver and/or expense reimbursements

rr_NetExpensesOverAssets

1.13%

^[1]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

115

^[2]

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

385

^[2]

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

675

^[2]

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 1,501

^[2]

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

38.90%

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

23.44%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

8.95%

Average Annual Returns, Inception Date

rr_AverageAnnualReturnInceptionDate

Feb. 12, 2001

[1] 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 of each class through March 31, 2015 (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 1.38% for Class A, 2.13% for Class C and 1.13% for Class Y. 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 these expense caps. 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.

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

XML

Label

Element

Value

Risk/Return:

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)

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 lesser of the offering price or the redemption price)

rr_MaximumDeferredSalesChargeOverOther

none

Redemption Fee (as a percentage of Amount Redeemed)

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%

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)

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

0.75%

Acquired fund fees and expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.07%

^[1]

Total annual fund operating expenses

rr_ExpensesOverAssets

1.82%

Fee Waiver or Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.05%)

^[2]

Total annual fund operating expenses after fee waiver and/or expense reimbursements

rr_NetExpensesOverAssets

1.77%

^[2]

Fee Waiver or Reimbursement over Assets, Date of Termination

rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination

2015-03-31

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 158% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

158.00%

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:

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 379

^[3]

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

1,162

^[3]

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

1,963

^[3]

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 4,050

^[3]

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.

The fund's investment strategies may result in high portfolio turnover.

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 ("LMCG") 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").

LMCG uses a bottom-up quantitative approach to investing in emerging markets equity securities. Inefficiencies in the market create opportunities, and LMCG 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. LMCG'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 LMCG 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 securi- ties 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.

High yield securities ("junk bonds") risk: Lower-rated securities (the issuers of which are typically in poor financial health) are subject to higher risks than investment grade securities. For example, lower-rated securities may be (1) subject to a greater risk of loss of principal and non-payment of interest (including default by the issuer); (2) subject to greater price volatility; and (3) less liquid than investment grade securities. The prices of such securities may be more vulnerable to bad economic news, or even the expectation of bad news, than higher rated fixed income securities.

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. LMCG 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 situa- tion 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 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.

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.

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%)

Annual Return 2012

rr_AnnualReturn2012

19.92%

Annual Return 2013

rr_AnnualReturn2013

(4.87%)

Bar Chart Closing [Text Block]

rr_BarChartClosingTextBlock

Best quarter during calendar years shown—2Q 2009: 31.65%
Worst quarter during calendar years shown—4Q 2008: (28.35)%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Best quarter during calendar years shown

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

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Dec. 31, 2008

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(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 situa- tion 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 (figures reflect 2% PACE Select Advisors Program Fee) (for the periods ended December 31, 2013)

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

(6.75%)

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

10.41%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

6.90%

Average Annual Returns, Inception Date

rr_AverageAnnualReturnInceptionDate

Aug. 24, 1995

After Taxes on Distributions

Risk/Return:

rr_RiskReturnAbstract

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

(6.66%)

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

10.45%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

5.84%

After Taxes on Distributions and Sale of Fund Shares

Risk/Return:

rr_RiskReturnAbstract

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

(3.51%)

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

8.62%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

6.04%

MSCI Emerging Markets Index (Index reflects no deduction for fees, expenses or taxes.)

Risk/Return:

rr_RiskReturnAbstract

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

(2.27%)

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

15.15%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

11.52%

[1] Since the "Acquired fund fees and expenses" are not directly borne by the fund, they are not reflected in the fund's financial statements, and therefore the amounts listed in "Total annual fund operating expenses" and "Total annual fund operating expenses after fee waiver and/or expense reimbursements" will differ from those presented in the Financial highlights.

[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 March 31, 2015 (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 1.70%. 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.

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

XML

Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

PACE® Global Real Estate Securities Investments

Objective [Heading]

rr_ObjectiveHeading

Investment objective

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

Total return.

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)

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 lesser of the offering price or the redemption price)

rr_MaximumDeferredSalesChargeOverOther

none

Redemption Fee (as a percentage of Amount Redeemed)

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%

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)

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

0.82%

Total annual fund operating expenses

rr_ExpensesOverAssets

1.52%

Fee Waiver or Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.32%)

^[1]

Total annual fund operating expenses after fee waiver and/or expense reimbursements

rr_NetExpensesOverAssets

1.20%

^[1]

Fee Waiver or Reimbursement over Assets, Date of Termination

rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination

2015-03-31

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 92% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

92.00%

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:

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 323

^[2]

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

1,050

^[2]

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

1,799

^[2]

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 3,771

^[2]

Strategy [Heading]

rr_StrategyHeading

Principal strategies

Strategy Narrative [Text Block]

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

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. CBRE Clarion 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).

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:

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. 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.

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.

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 [Text]

rr_RiskLoseMoney

You may lose money by investing in the fund.

Risk Nondiversified Status [Text]

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 [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 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 [Text]

rr_PerformanceInformationIllustratesVariabilityOfReturns

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.

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 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 [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.

Annual Return 2008

rr_AnnualReturn2008

(49.44%)

Annual Return 2009

rr_AnnualReturn2009

27.88%

Annual Return 2010

rr_AnnualReturn2010

16.27%

Annual Return 2011

rr_AnnualReturn2011

(6.17%)

Annual Return 2012

rr_AnnualReturn2012

29.46%

Annual Return 2013

rr_AnnualReturn2013

3.94%

Bar Chart Closing [Text Block]

rr_BarChartClosingTextBlock

Best quarter during calendar years shown—2Q 2009: 25.93%
Worst quarter during calendar years shown—4Q 2008: (33.20)%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Best quarter during calendar years shown

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

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Dec. 31, 2008

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(33.20%)

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 (figures reflect 2% PACE Select Advisors Program Fee) (for the periods ended December 31, 2013)

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

1.88%

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

11.18%

Average Annual Returns, Life of Class

rr_AverageAnnualReturnSinceInception

(4.04%)

Average Annual Returns, Inception Date

rr_AverageAnnualReturnInceptionDate

Jan. 22, 2007

After Taxes on Distributions

Risk/Return:

rr_RiskReturnAbstract

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

0.94%

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

9.23%

Average Annual Returns, Life of Class

rr_AverageAnnualReturnSinceInception

(5.49%)

After Taxes on Distributions and Sale of Fund Shares

Risk/Return:

rr_RiskReturnAbstract

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

1.06%

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

8.07%

Average Annual Returns, Life of Class

rr_AverageAnnualReturnSinceInception

(3.49%)

FTSE EPRA/NAREIT Developed Index (Index reflects no deduction for fees, expenses or taxes.)

Risk/Return:

rr_RiskReturnAbstract

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

4.39%

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

16.06%

Average Annual Returns, Life of Class

rr_AverageAnnualReturnSinceInception

(0.09%)

[1] 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 March 31, 2015 (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.

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

XML

Class P Prospectus | PACE® Global Real Estate Securities Investments | Class P

PACE® Global Real Estate Securities Investments

Investment objective

Total return.

Fees and expenses of the fund

These tables describe the fees and expenses that you may pay if you buy and hold shares of the fund.

Shareholder fees (fees paid directly from your investment)

Shareholder Fees	Class P Prospectus PACE® Global Real Estate Securities Investments Class P
Maximum front-end sales charge (load) imposed on purchases (as a % of the offering price)	none
Maximum deferred sales charge (load) (as a % of the offering price)	none
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)	2.00%
Redemption fee (as a % of the amount redeemed within 90 days of purchase, if applicable)	1.00%

Annual fund operating expenses (expenses that you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses		Class P Prospectus PACE® Global Real Estate Securities Investments Class P
Management fees		0.70%
Distribution and/or service (12b-1) fees		none
Other expenses (includes administration fee of 0.10%)		0.82%
Total annual fund operating expenses		1.52%
Management fee waiver/expense reimbursements	[1]	0.32%
Total annual fund operating expenses after fee waiver and/or expense reimbursements	[1]	1.20%

Example

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:

Expense Example (USD $)		1 year	3 years	5 years	10 years
Class P Prospectus PACE® Global Real Estate Securities Investments Class P	[1]	323	1,050	1,799	3,771

Portfolio turnover

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 92% of the average value of its portfolio.

Principal strategies

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

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. CBRE Clarion 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).

Principal risks

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. 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.

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.

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.

Performance

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.

PACE Global Real Estate Securities Investments Annual Total Returns of Class P Shares (2008 was Class P's first full calendar year of operations)

Best quarter during calendar years shown—2Q 2009: 25.93%
Worst quarter during calendar years shown—4Q 2008: (33.20)%

Average annual total returns (figures reflect 2% PACE Select Advisors Program Fee) (for the periods ended December 31, 2013)

Average Annual Returns Class P Prospectus PACE® Global Real Estate Securities Investments	Average Annual Returns, 1 Year	Average Annual Returns, 5 Years	Average Annual Returns, Life of Class	Average Annual Returns, Inception Date
Class P	1.88%	11.18%	(4.04%)	Jan. 22, 2007
Class P After Taxes on Distributions	0.94%	9.23%	(5.49%)
Class P After Taxes on Distributions and Sale of Fund Shares	1.06%	8.07%	(3.49%)
Class P FTSE EPRA/NAREIT Developed Index (Index reflects no deduction for fees, expenses or taxes.)	4.39%	16.06%	(0.09%)

[1] 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 March 31, 2015 (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.

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

XML

Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

PACE® Small/Medium Co Growth 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)

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 lesser of the offering price or the redemption price)

rr_MaximumDeferredSalesChargeOverOther

none

Redemption Fee (as a percentage of Amount Redeemed)

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%

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)

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

0.44%

Total annual fund operating expenses

rr_ExpensesOverAssets

1.14%

Fee Waiver or Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.01%)

^[1]

Total annual fund operating expenses after fee waiver and/or expense reimbursements

rr_NetExpensesOverAssets

1.13%

^[1]

Fee Waiver or Reimbursement over Assets, Date of Termination

rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination

2015-03-31

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 60% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

60.00%

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:

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 316

^[2]

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

968

^[2]

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

1,644

^[2]

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 3,447

^[2]

Strategy [Heading]

rr_StrategyHeading

Principal strategies

Strategy Narrative [Text Block]

rr_StrategyNarrativeTextBlock

Principal investments

The fund invests primarily in stocks of "emerging growth" companies that are believed to have potential for high future earnings growth relative to the overall market. 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 issued by small/medium capitalization companies. As of the date of this prospectus, small/medium capitalization companies means companies with a total market capitalization of less than $6.0 billion at the time of purchase. Effective April 28, 2014, small/medium capitalization companies means companies with a total market capitalization within the market capitalization range of the companies in the Russell 2500^® Growth Index at the time of purchase. Dividend income is an incidental consideration in the investment advisors' selection of stocks for the fund.

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 healthcare or technology. The fund may invest, to a limited extent, in stocks of companies with larger total market capitalizations and other securities, including securities convertible into stocks. The fund may invest up to 10% of its total assets in non-US securities, which may trade either within or outside the US.

The fund's investment strategies may result in high portfolio turnover.

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. Copper Rock Capital Partners, LLC ("Copper Rock"), Palisade Capital Management, L.L.C. ("Palisade"), Riverbridge Partners, LLC ("Riverbridge"), Lee Munder Capital Group, LLC ("LMCG") and Timpani Capital Management LLC ("Timpani") 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.

Copper Rock employs a fundamental, bottom-up investment approach that focuses on identifying emerging companies that exhibit the potential for strong and sustainable revenue growth over each of the following two years. Copper Rock believes that incremental margin expansion and proven management are key factors that propel a company's growth. Copper Rock will typically hold 70 to 90 equity positions that are diversified across sectors and industries. Copper Rock utilizes a "pure" growth investment style that emphasizes growth and momentum characteristics, and attempts to manage risk by diversifying and understanding its holdings and employing a stringent sell discipline.

Palisade seeks fundamentally strong and dynamic small and mid cap companies that are trading at a discount to their growth rates. Palisade's goal is to ascertain a dynamic of change before it manifests in consensus es- timates. Palisade believes that the small and mid cap market is inherently less efficient than the large cap market, and attempts to gain an informational advantage by committing to the labor intensive process of conducting bottom-up fundamental research on small and mid cap companies, as well as their customers, competitors and supply chains. Palisade places heavy emphasis on the effectiveness of a small/mid cap company's management team and seeks direct access to a variety of each company's key decision-makers.

Riverbridge believes that earnings power determines the value of a franchise. Riverbridge focuses on companies that are viewed as building their earnings power and building the intrinsic value of the company over long periods of time. Riverbridge looks to invest in high-quality growth companies that demonstrate the ability to sustain strong secular earnings growth, regardless of overall economic conditions.

LMCG seeks to achieve competitive returns in small/medium capitalization companies by identifying unrecognized growth potential, wherever it exists across all industry sectors. LMCG seeks to identify firms with high quality business models, distinct competitive advantages, proven management teams, and significant growth potential. Revenue growth, margin expansion, and the ability to positively surprise and revise earnings estimates are key characteristics in LMCG's holdings. LMCG seeks to identify firms that have duration and sustainability of these characteristics based on their competitive positions in their respective industries.

Timpani seeks to invest in small cap companies where growth is robust, sustainable and underestimated by the market. Timpani uses fundamental research, focusing on companies that it believes have superior management and whose business models have a high potential for earnings upside. Timpani forms an investment decision based on this research and an assessment of the market's perception of these companies. Timpani may invest in any sector, may emphasize one or more particular sectors and may sell a company's stock when it believes a company's prospects for growth have diminished. Timpani may also sell or reduce a portfolio position when it sees market sentiment turn negative on a stock held in the portfolio.

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.

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.

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.

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.

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.

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.

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 [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. Riverbridge assumed day-to-day management of a portion of the fund's assets on October 1, 2005. Copper Rock assumed responsibility for managing a separate portion of the fund's assets on March 1, 2007. Palisade assumed day-to-day management of a separate portion of the fund's assets on February 2, 2009. LMCG and Timpani assumed day-to-day management of a separate portion of the fund's assets on November 25, 2013. 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 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.

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 Small/Medium Co Growth 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.

Annual Return 2004

rr_AnnualReturn2004

11.01%

Annual Return 2005

rr_AnnualReturn2005

3.28%

Annual Return 2006

rr_AnnualReturn2006

8.59%

Annual Return 2007

rr_AnnualReturn2007

16.21%

Annual Return 2008

rr_AnnualReturn2008

(43.74%)

Annual Return 2009

rr_AnnualReturn2009

40.23%

Annual Return 2010

rr_AnnualReturn2010

28.69%

Annual Return 2011

rr_AnnualReturn2011

(2.00%)

Annual Return 2012

rr_AnnualReturn2012

16.79%

Annual Return 2013

rr_AnnualReturn2013

38.88%

Bar Chart Closing [Text Block]

rr_BarChartClosingTextBlock

Best quarter during calendar years shown—2Q 2009: 20.64%
Worst quarter during calendar years shown—4Q 2008: (26.31)%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Best quarter during calendar years shown

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Jun. 30, 2009

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

20.64%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Worst quarter during calendar years shown

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Dec. 31, 2008

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(26.31%)

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 (figures reflect 2% PACE Select Advisors Program Fee) (for the periods ended December 31, 2013)

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

36.13%

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

21.01%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

6.69%

Average Annual Returns, Inception Date

rr_AverageAnnualReturnInceptionDate

Aug. 24, 1995

After Taxes on Distributions

Risk/Return:

rr_RiskReturnAbstract

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

31.84%

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

20.16%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

5.68%

After Taxes on Distributions and Sale of Fund Shares

Risk/Return:

rr_RiskReturnAbstract

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

23.04%

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

17.12%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

5.28%

Russell 2500 Growth Index (Index reflects no deduction for fees, expenses or taxes.)

Risk/Return:

rr_RiskReturnAbstract

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

40.65%

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

24.03%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

10.11%

[1] 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 March 31, 2015 (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 1.13%. 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.

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

XML

Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

PACE® High Yield Investments

Objective [Heading]

rr_ObjectiveHeading

Investment objective

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

Total return.

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)

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 lesser of the offering price or the redemption price)

rr_MaximumDeferredSalesChargeOverOther

none

Redemption Fee (as a percentage of Amount Redeemed)

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%

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)

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

0.41%

Total annual fund operating expenses

rr_ExpensesOverAssets

1.11%

Fee Waiver or Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.08%)

^[1]

Total annual fund operating expenses after fee waiver and/or expense reimbursements

rr_NetExpensesOverAssets

1.03%

^[1]

Fee Waiver or Reimbursement over Assets, Date of Termination

rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination

2015-03-31

Portfolio Turnover [Heading]

rr_PortfolioTurnoverHeading

Portfolio turnover

Portfolio Turnover [Text Block]

rr_PortfolioTurnoverTextBlock

The fund pays transaction costs, such as commissions or dealer spreads, 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 26% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

26.00%

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:

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 306

^[2]

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

952

^[2]

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

1,623

^[2]

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 3,415

^[2]

Strategy [Heading]

rr_StrategyHeading

Principal strategies

Strategy Narrative [Text Block]

rr_StrategyNarrativeTextBlock

Principal investments

The fund seeks to achieve its objective by investing primarily in a professionally managed, diversified portfolio of fixed income securities rated below investment grade. Under normal circumstances, the fund invests at least 80% of its net assets (plus the amount of any borrowing for investment purposes) in high yield fixed income securities that are rated below investment grade or considered to be of comparable quality (commonly known as "junk bonds").

These investments will include fixed income securities that are (1) rated below investment grade (lower than a Baa rating by Moody's Investors Service, Inc. ("Moody's") or lower than a BBB rating by Standard and Poor's, a division of The McGraw Hill Companies Inc. ("S&P")); (2) comparably rated by another nationally recognized statistical rating organization (collectively, with Moody's and S&P, "Rating Agencies"); or (3) unrated, but deemed by the fund's investment advisor to be of comparable quality to fixed income securities rated below Baa, BBB or a comparable rating by a Rating Agency.

The fund may invest up to 10% of its total assets in US and/or non-US senior secured bank loans (each of which may be denominated in foreign currencies), which may be in the form of loan participations and assignments. The fund may invest in a number of different countries throughout the world, including the US.

Under normal circumstances, the fund's average duration will be within +/- 50% of that of the BofA Merrill Lynch Global High Yield Index, as calculated by the investment advisor, which as of December 31, 2013 was approximately 2.97 years. Duration is a measure of the fund's exposure to interest rate risk—a longer duration means that changes in market interest rates are likely to have a larger effect on the value of the fund's portfolio. The fund has no average targeted portfolio maturity.

The fund may, but is not required to, use exchange-traded or over-the-counter derivative instruments for risk management purposes or to attempt to increase total returns. The derivatives in which the fund may invest include futures (specifically, interest rate futures) and currency forward agreements. These derivatives may be used for risk management purposes, such as hedging the fund's currency exposure, or otherwise managing the risk profile of the fund. In addition, the derivative instruments listed above may be used to obtain or adjust exposure to certain markets. Interest rate futures may also be used to adjust the fund's portfolio duration.

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. MacKay Shields LLC ("MacKay Shields") currently serves as the fund's investment advisor. MacKay Shields attempts to deliver attractive risk adjusted returns by avoiding most of the unusually large losses in the high yield market, even if it means giving up much of the large potential gains. MacKay Shields believes that there is a very small subset of bonds that delivers outsized gains in the market. Due to the limited upside inherent in most bonds, over time, outsized gains are expected to be smaller than unusually large losses. By attempting to limit the fund's participation in the extremes of the market, MacKay Shields strives to add value over a market cycle and with lower volatility through a rigorous process that attempts to screen out what it believes to be the riskiest issuers in the market.

Risk [Heading]

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Principal risks

Risk Narrative [Text Block]

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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:

High yield securities ("junk bonds") risk: Lower-rated securities (the issuers of which are typically in poor financial health) are subject to higher risks than investment grade securities. For example, lower-rated securities may be (1) subject to a greater risk of loss of principal and non-payment of interest (including default by the issuer); (2) subject to greater price volatility; and (3) less liquid than investment grade securities. The prices of such securities may be more vulnerable to bad economic news, or even the expectation of bad news, than higher rated fixed income securities.

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.

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.

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.

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.

Valuation risk: During periods of reduced market liquidity or in the absence of readily available market quotations, the ability of the fund to value the fund's securities becomes more difficult and the judgment of the fund's manager and investment advisor may play a greater role in the valuation of the securities due to reduced availability of reliable objective pricing data.

Derivatives risk: The value of "derivatives"—so called because their value "derives" from the value of an underlying asset, reference rate or index—may rise or fall more rapidly than other investments. When using derivatives for non-hedging purposes, it is possible for the fund to lose more than the amount it invested in the derivative. When using derivatives for hedging purposes, the fund's overall returns may be reduced if the hedged investment experiences a favorable price movement. The risks of investing in derivative instruments also include market and management risks. Derivatives relating to fixed income markets are especially susceptible to interest rate risk and credit risk. In addition, many types of non-exchange traded derivatives may be subject to liquidity risk, counterparty risk, credit risk and mispricing or valuation complexity. These derivatives risks are different from, and may be greater than, the risks associated with investing directly in securities and other instruments.

Swap agreement risk: The fund may enter into various types of swap agreements. Swap agreements can be less liquid and more difficult to value than other investments. Because its cash flows are based in part on changes in the value of the reference asset, a total return swap's market value will vary with changes in that reference asset. In addition, the fund may experience delays in payment or loss of income if the counterparty fails to perform under the contract.

Loan investments risk: In addition to those risks typically associated with investments in debt securities, investments in bank loans are subject to the risk that the collateral securing a loan may not provide sufficient protection to the fund. With respect to participations in loans, the fund's contractual relationship is typically with the lender (rather than the borrower). Consequently, the fund may have limited rights of enforcement against the borrower and assumes the credit risk of both the lender and the borrower. Investments in bank loans may be relatively illiquid, which could adversely affect the value of these investments and the fund's ability to dispose of them.

Structured security risk: The fund may purchase securities representing interests in underlying assets, but structured to provide certain advantages not inherent in those assets (e.g., enhanced liquidity and yields linked to short-term interest rates). If those securities behaved in a way that the fund's investment advisor did not anticipate, or if the security structures encountered unexpected difficulties, the fund could suffer a loss.

Management risk: The risk that the investment strategies, techniques and risk analyses employed by the investment advisor may not produce the desired results.

Risk Lose Money [Text]

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You may lose money by investing in the fund.

Risk Not Insured Depository Institution [Text]

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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]

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Performance

Performance Narrative [Text Block]

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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. Updated performance for the fund is available at http://globalamus.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]

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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.

Performance Availability Website Address [Text]

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http://globalamus.ubs.com/corpweb/performance.do

Performance Past Does Not Indicate Future [Text]

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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]

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PACE High Yield Investments Annual Total Returns of Class P Shares (2007 was Class P's first full calendar year of operations)

Bar Chart Does Not Reflect Sales Loads [Text]

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The bar chart does not reflect the maximum annual PACE Select Advisors Program fee; if it did, the total returns shown would be lower.

Annual Return 2007

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1.36%

Annual Return 2008

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(18.53%)

Annual Return 2009

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50.86%

Annual Return 2010

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15.28%

Annual Return 2011

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0.00%

Annual Return 2012

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18.34%

Annual Return 2013

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6.62%

Bar Chart Closing [Text Block]

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Best quarter during calendar years shown—2Q 2009: 20.77%
Worst quarter during calendar years shown—4Q 2008: (12.52)%

Highest Quarterly Return, Label

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Best quarter during calendar years shown

Highest Quarterly Return, Date

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Jun. 30, 2009

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

20.77%

Lowest Quarterly Return, Label

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Worst quarter during calendar years shown

Lowest Quarterly Return, Date

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Dec. 31, 2008

Lowest Quarterly Return

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(12.52%)

Index No Deduction for Fees, Expenses, Taxes [Text]

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(Index reflects no deduction for fees, expenses or taxes.)

Performance Table Uses Highest Federal Rate

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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

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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

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Average annual total returns (figures reflect 2% PACE Select Advisors Program Fee) (for the periods ended December 31, 2013)

Average Annual Returns, 1 Year

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4.51%

Average Annual Returns, 5 Years

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14.70%

Average Annual Returns, Life of Class

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6.69%

Average Annual Returns, Inception Date

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Apr. 10, 2006

After Taxes on Distributions

Risk/Return:

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Average Annual Returns, 1 Year

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1.91%

Average Annual Returns, 5 Years

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11.61%

Average Annual Returns, Life of Class

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3.90%

After Taxes on Distributions and Sale of Fund Shares

Risk/Return:

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Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

2.52%

Average Annual Returns, 5 Years

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10.53%

Average Annual Returns, Life of Class

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4.08%

BofA Merrill Lynch Global High Yield Index (hedged in USD) (Index reflects no deduction for fees, expenses or taxes.)

Risk/Return:

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Average Annual Returns, 1 Year

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7.10%

Average Annual Returns, 5 Years

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19.49%

Average Annual Returns, Life of Class

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9.17%

[1] 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 March 31, 2015 (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 1.03%. 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.

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

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Class P Prospectus | PACE® Money Market Investments

PACE® Money Market Investments

Investment objective

Current income consistent with preservation of capital and liquidity.

Fees and expenses of the fund

These tables describe the fees and expenses that you may pay if you buy and hold shares of the fund.

Shareholder fees (fees paid directly from your investment)

Shareholder Fees	Class P Prospectus PACE® Money Market Investments Class P
Maximum front-end sales charge (load) imposed on purchases (as a % of the offering price)	none
Maximum deferred sales charge (load) (as a % of the offering price)	none
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)	2.00%

Annual fund operating expenses (expenses that you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses		Class P Prospectus PACE® Money Market Investments Class P
Management fees		0.25%
Distribution and/or service (12b-1) fees		none
Other expenses (includes administration fee of 0.10%)		0.63%
Total annual fund operating expenses		0.88%
Management fee waiver/expense reimbursements	[1]	0.28%
Total annual fund operating expenses after fee waiver and/or expense reimbursements	[1]	0.60%

Example

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:

Expense Example (USD $)		1 year	3 years	5 years	10 years
Class P Prospectus PACE® Money Market Investments Class P	[1]	263	866	1,494	3,185

Principal strategies

Principal investments

The fund is a money market mutual fund and seeks to maintain a stable price of $1.00 per share. To do this, the fund invests in a diversified portfolio of high quality money market instruments of governmental and private issuers.

Money market instruments generally are short-term debt obligations and similar securities. They also may include longer-term bonds that have variable interest rates or other special features that give them the financial characteristics of short-term debt. The fund invests in foreign money market instruments only if they are denominated in US dollars.

Management process

UBS Global Asset Management (Americas) Inc. ("UBS Global AM"), the fund's manager and investment advisor, selects money market instruments for the fund based on its assessment of relative values and changes in market and economic conditions. UBS Global AM considers safety of principal and liquidity in selecting securities for the fund and thus may not buy securities that pay the highest yield.

Principal risks

All investments carry a certain amount of risk and the fund cannot guarantee that it will achieve its investment objective. While the fund seeks to maintain the value of your investment at $1.00 per share, you may lose money by investing in the fund. An investment in the fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. Money market instruments generally have a low risk of loss, but they are not risk-free. The principal risks presented by an investment in the fund are:

Credit risk: Issuers of money market instruments may fail to make payments when due, or they may become less willing or less able to do so.

Interest rate risk: The value of the fund's investments generally will fall when short term interest rates rise, and its yield will tend to lag behind prevailing rates.

Market risk: The risk that the market value of the fund's investments may fluctuate, sometimes rapidly or unpredictably, as the markets fluctuate, which may affect the fund's ability to maintain a $1.00 share price. 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.

US Government securities risk: There are different types of US government securities with different levels of credit risk, including the risk of default, depending on the nature of the particular government support for that security. For example, a US government-sponsored entity, such as Federal National Mortgage Association ("Fannie Mae") or Federal Home Loan Mortgage Corporation ("Freddie Mac"), although chartered or sponsored by an Act of Congress, may issue securities that are neither insured nor guaranteed by the US Treasury and are therefore riskier than those that are.

Foreign investing risk: The value of the fund's investments in foreign securities may fall due to adverse political, social and economic developments abroad. Investments in foreign government bonds involve special risks because the fund may have limited legal recourse in the event of default. However, because the fund's foreign investments must be denominated in US dollars, it generally is not subject to the risk of changes in currency valuations.

Liquidity risk: Although the fund invests in a diversified portfolio of high quality instruments, the fund's investments may become less liquid as a result of market developments or adverse investor perception.

Management risk: The risk that the investment strategies, techniques and risk analyses employed by the investment advisor may not produce the desired results.

Performance

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. The fund's past performance is not necessarily an indication of how the fund will perform in the future. Updated performance information is available by contacting your Financial Advisor or by calling 1-888-793 8637 (Option #1).

PACE Money Market Investments Annual Total Returns of Class P Shares

Best quarter during calendar years shown—4Q 2006: 1.20%
Worst quarters during calendar years shown—3Q 2009 & 1Q, 2Q, & 3Q, 2010 & 1Q 2011: 0.00%
(Actual total return was 0.0024%)

Average annual total returns (figures reflect 2% PACE Select Advisors Program Fee) (for the periods ended December 31, 2013)

Average Annual Returns	Average Annual Returns, 1 Year	Average Annual Returns, 5 Years	Average Annual Returns, 10 Years	Average Annual Returns, Inception Date
Class P Prospectus PACE® Money Market Investments Class P	(1.97%)	(1.95%)	(0.52%)	Aug. 24, 1995

[1] 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 March 31, 2015 (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 0.60%. 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.

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

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A, C, Y Prospectus | PACE® Mortgage-Backed Securities Fixed Income Investments

PACE® Mortgage-Backed Securities Fixed Income Investments

Investment objective

Current income.

Fees and expenses of the fund

These tables describe the fees and expenses that you may pay if you buy and hold shares of the fund. You may qualify for sales charge discounts on purchases of Class A shares if you or your family invest, or agree to invest in the future, at least $100,000 in the UBS family of funds. More information about these and other discounts and waivers, as well as eligibility requirements for each share class, is available from your financial advisor and in "Managing your fund account" on page 109 of the prospectus and in "Reduced sales charges, additional purchase, exchange and redemption information and other services" on page 208 of the fund's Statement of Additional Information.

Shareholder fees (fees paid directly from your investment)

Shareholder Fees A, C, Y Prospectus PACE® Mortgage-Backed Securities Fixed Income Investments	Class A	Class C	Class Y
Maximum front-end sales charge (load) imposed on purchases (as a % of the offering price)	4.50%	none	none
Maximum deferred sales charge (load) (as a % of the lesser of the offering price or the redemption price)	none	0.75%	none
Exchange fee	none	none	none
Redemption fee (as a % of the amount redeemed within 90 days of purchase, if applicable)	1.00%	1.00%	1.00%

Annual fund operating expenses (expenses that you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses A, C, Y Prospectus PACE® Mortgage-Backed Securities Fixed Income Investments		Class A	Class C	Class Y
Management fees		0.52%	0.52%	0.52%
Distribution and/or service (12b-1) fees		0.25%	0.75%	none
Other expenses (includes administration fee of 0.10%)		0.28%	0.29%	0.33%
Total annual fund operating expenses		1.05%	1.56%	0.85%
Management fee waiver/expense reimbursements	[1]	0.08%	0.09%	0.13%
Total annual fund operating expenses after fee waiver and/or expense reimbursements	[1]	0.97%	1.47%	0.72%

Example

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 unless otherwise stated. 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:

Expense Example A, C, Y Prospectus PACE® Mortgage-Backed Securities Fixed Income Investments (USD $)		1 year	3 years	5 years	10 years
Class A	[1]	545	761	996	1,668
Class C	[1]	225	484	841	1,849
Class Y	[1]	74	258	459	1,037

Expense Example No Redemption (USD $)		1 year	3 years	5 years	10 years
A, C, Y Prospectus PACE® Mortgage-Backed Securities Fixed Income Investments Class C	[1]	150	484	841	1,849

Portfolio turnover

The fund pays transaction costs, such as commissions or dealer spreads, 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 1,336% of the average value of its portfolio.

Principal strategies

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 a diversified portfolio of mortgage-related fixed income instruments, such as mortgage-backed securities (including mortgage pass-through securities and collateralized mortgage obligations ("CMOs"), commercial mortgage-backed securities, "to be announced" (or "TBA") securities and mortgage dollar rolls). The mortgage-backed securities in which the fund may invest include those issued or guaranteed by US government agencies or instrumentalities or private entities.

The fund also may invest in other types of investment grade fixed income instruments (or unrated bonds of equivalent quality).

TBA securities are mortgage-backed securities that usually are traded on a forward commitment basis with an approximate principal amount and no defined maturity date, issued or guaranteed by US government agencies and instrumentalities. The fund also may engage in TBA and Treasury "roll" transactions. A TBA roll transaction is a strategy whereby the investment advisor decides to sell one TBA security and buy another TBA security due at a later date (Treasury roll transactions differ in that the underlying securities are US Treasury securities). The fund also may invest in when-issued or delayed delivery bonds to increase its return, giving rise to a form of leverage.

The fund invests in bonds of varying maturities, but normally limits its portfolio "duration" to within +/- 50% of the effective duration of the fund's benchmark index, Barclays US Mortgage-Backed Securities Index, as calculated by the investment advisor, which as of December 31, 2013 was approximately 4.85 years. Duration is a measure of the fund's exposure to interest rate risk—a longer duration means that changes in market interest rates are likely to have a larger effect on the value of the fund's portfolio.

The fund may engage in "short-selling" with respect to securities issued by the US Treasury and certain TBA securities coupon trades. For example, the fund may take a short position in TBA securities as a means of profiting if the underlying mortgages decline in value. The fund also may hold or purchase TBA securities with one coupon and take a short position in TBA securities with another coupon. Although the price movements of the short and long positions of the transaction are, in general, correlated due to the two securities having comparable credit quality and liquidity level, there may be variances between the price movements of different coupon instruments, potentially permitting the fund to add to its return.

The fund's investment strategies may result in high portfolio turnover.

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. Pacific Investment Management Company LLC ("PIMCO") currently serves as the fund's investment advisor. PIMCO establishes duration targets for the fund's portfolio based on its expectations for changes in interest rates and then positions the fund to take advantage of yield curve shifts. PIMCO decides to buy or sell specific bonds based on an analysis of their values relative to other similar bonds. PIMCO monitors the prepayment experience of the fund's mortgage-backed securities and will also buy and sell securities to adjust the fund's average portfolio duration, credit quality, yield curve and sector and prepayment exposure, as appropriate.

Principal risks

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:

US Government securities risk: There are different types of US government securities with different levels of credit risk, including the risk of default, depending on the nature of the particular government support for that security. For example, a US government-sponsored entity, such as Federal National Mortgage Association ("Fannie Mae") or Federal Home Loan Mortgage Corporation ("Freddie Mac"), although chartered or sponsored by an Act of Congress, may issue securities that are neither insured nor guaranteed by the US Treasury and are therefore riskier than those that are.

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.

Prepayment risk: The fund's mortgage- and asset-backed securities may be prepaid more rapidly than expected, especially when interest rates are falling, and the fund may have to reinvest those prepayments at lower interest rates. When interest rates are rising, slower prepayments may extend the duration of the securities and may reduce their value.

Leverage risk associated with financial instruments: The use of financial instruments to increase potential returns, including derivatives used for investment (non-hedging) purposes, may cause the fund to be more volatile than if it had not been leveraged. The use of leverage may also accelerate the velocity of losses and can result in losses to the fund that exceed the amount originally invested.

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.

Short sales risk: There are certain unique risks associated with the use of short sales strategies. When selling a security short, the 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.

Arbitrage trading risk: The underlying relationships between securities in which the fund takes arbitrage investment positions may change in an adverse manner, causing the fund to realize losses.

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.

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.

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.

Management risk: The risk that the investment strategies, techniques and risk analyses employed by the investment advisor may not produce the desired results.

Mortgage-related securities risk: Mortgage-related securities are subject to risks that are different from and/or more acute than risks associated with other types of debt instruments. Such risks may include prepayment risk, as discussed above. Conversely, in periods of rising interest rates, the fund may be subject to extension risk, and may receive principal later than expected, causing additional volatility. During periods of difficult or frozen credit markets, significant changes in interest rates, or deteriorating economic conditions, such securities may decline in value, face valuation difficulties, become more volatile and become illiquid. Certain types of mortgage-backed securities (e.g., CMOs and stripped mortgage-backed securities) can be even more volatile and may be more sensitive to the rate of prepayments than other mortgage-related securities. The risk of default for "sub-prime" mortgages is generally higher than other types of mortgage-backed securities. The structure of some of these securities may be complex, and there may be less available information than other types of debt securities.

Performance

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 sales charges of the fund's Class C shares; 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. 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. After-tax returns for other classes will vary from the Class C shares' after-tax returns shown.

PACE Mortgage-Backed Securities Fixed Income Investments Annual Total Returns of Class C Shares

Best quarter during calendar years shown—3Q 2009: 3.57%
Worst quarter during calendar years shown—2Q 2013: (2.23)%

Average annual total returns (figures reflect sales charges) (for the periods ended December 31, 2013)

Average Annual Returns A, C, Y Prospectus PACE® Mortgage-Backed Securities Fixed Income Investments	Average Annual Returns, 1 Year	Average Annual Returns, 5 Years	Average Annual Returns, 10 Years	Average Annual Returns, Inception Date
Class A	(6.51%)	3.50%	3.72%	Jan. 31, 2001
Class C	(3.23%)	3.95%	3.67%	Dec. 04, 2000
Class Y	(1.85%)	4.72%	4.48%	Feb. 02, 2001
After Taxes on Distributions Class C	(3.99%)	2.41%	2.25%
After Taxes on Distributions and Sale of Fund Shares Class C	(1.82%)	2.55%	2.35%
Barclays US Mortgage-Backed Securities Index (Index reflects no deduction for fees, expenses or taxes.)	(1.41%)	3.69%	4.61%

[1] 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: (1) waive its management fees through March 31, 2015 to the extent necessary to reflect the lower sub-advisory fee paid by UBS Global AM to Pacific Investment Management Company LLC, the fund's investment advisor; and (2) waive its management fees and/or reimburse expenses so that the fund's ordinary total operating expenses of each class through March 31, 2015 (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 0.97% for Class A, 1.47% for Class C and 0.72% for Class Y. The fund has agreed to repay UBS Global AM for any waived fees/reimbursed expenses (pursuant to item (2)) 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 these expense caps. 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.

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

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

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Class P Prospectus | PACE® Strategic Fixed Income Investments | Class P

PACE® Strategic Fixed Income Investments

Investment objective

Total return consisting of income and capital appreciation.

Fees and expenses of the fund

These tables describe the fees and expenses that you may pay if you buy and hold shares of the fund.

Shareholder fees (fees paid directly from your investment)

Shareholder Fees	Class P Prospectus PACE® Strategic Fixed Income Investments Class P
Maximum front-end sales charge (load) imposed on purchases (as a % of the offering price)	none
Maximum deferred sales charge (load) (as a % of the offering price)	none
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)	2.00%
Redemption fee (as a % of the amount redeemed within 90 days of purchase, if applicable)	1.00%

Annual fund operating expenses (expenses that you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses	Class P Prospectus PACE® Strategic Fixed Income Investments Class P
Management fees	0.50%
Distribution and/or service (12b-1) fees	none
Other expenses (includes administration fee of 0.10%)	0.31%
Total annual fund operating expenses	0.81%

Example

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:

Expense Example (USD $)	1 year	3 years	5 years	10 years
Class P Prospectus PACE® Strategic Fixed Income Investments Class P	284	871	1,484	3,138

Portfolio turnover

The fund pays transaction costs, such as commissions or dealer spreads, 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 186% of the average value of its portfolio.

Principal strategies

Principal investments

The fund invests in bonds of varying maturities, but normally limits its portfolio "duration" to within +/- 50% of the effective duration of the fund's benchmark index, Barclays US Government/Credit Index, as calculated by the investment advisor, which as of December 31, 2013 was approximately 5.12 years. Duration is a measure of the fund's exposure to interest rate risk—a longer duration means that changes in market interest rates are likely to have a larger effect on the value of the fund's portfolio.

Under normal circumstances, the fund invests at least 80% of its net assets (plus the amount of any borrowing for investment purposes) in investment grade fixed income securities. Such investments may include US government bonds, bonds that are backed by mortgages and other assets, bonds (including convertible bonds) of US and foreign private issuers, foreign government bonds (including bonds issued by supranational and quasi-governmental entities), foreign currency exchange-related securities, loan participations and assignments, repurchase agreements, municipals, structured notes, and money market instruments (including commercial paper and certificates of deposit). There are different types of US government securities, including those issued or guaranteed by the US government, its agencies and its instrumentalities, and they have different types of government support. Some are supported by the full faith and credit of the US, while others are supported by (1) the ability of the issuer to borrow from the US Treasury; (2) the credit of the issuing agency, instrumentality or government-sponsored entity; (3) pools of assets, such as mortgages; or (4) the US government in some other way.

The fund also invests, to a limited extent, in bonds that are below investment grade. Securities rated below investment grade (or unrated bonds of equivalent quality) are commonly known as "junk bonds." The fund may invest in when-issued or delayed delivery bonds to increase its return, giving rise to a form of leverage. The fund may invest in preferred securities.

The fund may invest in "to be announced" or "TBA" securities, which are mortgage-backed securities that usually are traded on a forward commitment basis with an approximate principal amount and no defined maturity date, issued or guaranteed by US government agencies and instrumentalities. The fund also may engage in TBA and Treasury "roll" transactions. A TBA roll transaction is a strategy whereby the investment advisor decides to sell one TBA security and buy another TBA security due at a later date (Treasury roll transactions differ in that the underlying securities are US Treasury securities).

The fund may, but is not required to, use exchange-traded or over-the-counter derivative instruments for risk management purposes or to attempt to increase total returns. The derivatives in which the fund may invest include options (on securities and swap agreements), futures (on securities or interest rate futures), currency forward agreements, swap agreements (specifically, interest rate and credit default swaps) and structured notes. These derivatives may be used for risk management purposes, such as hedging the fund's security, index, currency, interest rate or other exposure, or otherwise managing the risk profile of the fund. In addition, the derivative instruments listed above may be used in place of direct investments; to obtain or adjust exposure to certain markets; or to establish net short positions in markets, currencies or securities. Options, interest rate futures and swaps may also be used to adjust the fund's portfolio duration.

The fund's investment strategies may result in high portfolio turnover.

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. Pacific Investment Management Company LLC ("PIMCO") currently serves as the fund's investment advisor. PIMCO seeks to invest the fund's assets in those areas of the bond market that it considers undervalued, based on such factors as quality, sector, coupon and maturity. PIMCO establishes duration targets for the fund's portfolio based on its expectations for changes in interest rates and then positions the fund to take advantage of yield curve shifts. PIMCO decides to buy or sell specific bonds based on an analysis of their values relative to other similar bonds. PIMCO monitors the prepayment experience of the fund's mortgage-backed bonds and will also buy and sell securities to adjust the fund's average portfolio duration, credit quality, yield curve, sector and prepayment exposure, as appropriate.

Principal risks

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:

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.

Prepayment risk: The fund's mortgage- and asset-backed securities may be prepaid more rapidly than expected, especially when interest rates are falling, and the fund may have to reinvest those prepayments at lower interest rates. When interest rates are rising, slower prepayments may extend the duration of the securities and may reduce their value.

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.

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.

Leverage risk associated with financial instruments: The use of financial instruments to increase potential returns, including derivatives used for investment (non-hedging) purposes, may cause the fund to be more volatile than if it had not been leveraged. The use of leverage may also accelerate the velocity of losses and can result in losses to the fund that exceed the amount originally invested.

Derivatives risk: The value of "derivatives"—so called because their value "derives" from the value of an underlying asset, reference rate or index—may rise or fall more rapidly than other investments. When using derivatives for non-hedging purposes, it is possible for the fund to lose more than the amount it invested in the derivative. When using derivatives for hedging purposes, the fund's overall returns may be reduced if the hedged investment experiences a favorable price movement. The risks of investing in derivative instruments also include market and management risks. Derivatives relating to fixed income markets are especially susceptible to interest rate risk and credit risk. In addition, many types of swaps and other non-exchange traded derivatives may be subject to liquidity risk, counterparty risk, credit risk and mispricing or valuation complexity. These derivatives risks are different from, and may be greater than, the risks associated with investing directly in securities and other instruments.

High yield securities ("junk bonds") risk: Lower-rated securities (the issuers of which are typically in poor financial health) are subject to higher risks than investment grade securities. For example, lower-rated securities may be (1) subject to a greater risk of loss of principal and non-payment of interest (including default by the issuer); (2) subject to greater price volatility; and (3) less liquid than investment grade securities. The prices of such securities may be more vulnerable to bad economic news, or even the expectation of bad news, than higher rated fixed income securities.

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.

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.

US Government securities risk: There are different types of US government securities with different levels of credit risk, including the risk of default, depending on the nature of the particular government support for that security. For example, a US government-sponsored entity, such as Federal National Mortgage Association ("Fannie Mae") or Federal Home Loan Mortgage Corporation ("Freddie Mac"), although chartered or sponsored by an Act of Congress, may issue securities that are neither insured nor guaranteed by the US Treasury and are therefore riskier than those that are.

Swap agreement risk: The fund may enter into various types of swap agreements. Swap agreements can be less liquid and more difficult to value than other investments. Because its cash flows are based in part on changes in the value of the reference asset, a total return swap's market value will vary with changes in that reference asset. In addition, the fund may experience delays in payment or loss of income if the counterparty fails to perform under the contract.

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.

Management risk: The risk that the investment strategies, techniques and risk analyses employed by the investment advisor may not produce the desired results.

Mortgage-related securities risk: Mortgage-related securities are subject to risks that are different from and/or more acute than risks associated with other types of debt instruments. Such risks may include prepayment risk, as discussed above. Conversely, in periods of rising interest rates, the fund may be subject to extension risk, and may receive principal later than expected, causing additional volatility. During periods of difficult or frozen credit markets, significant changes in interest rates, or deteriorating economic conditions, such securities may decline in value, face valuation difficulties, become more volatile and become illiquid. Certain types of mortgage-backed securities (e.g., CMOs and stripped mortgage-backed securities) can be even more volatile and may be more sensitive to the rate of prepayments than other mortgage-related securities. The risk of default for "sub-prime" mortgages is generally higher than other types of mortgage-backed securities. The structure of some of these securities may be complex, and there may be less available information than other types of debt securities.

Performance

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. 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.

PACE Strategic Fixed Income Investments Annual Total Returns of Class P Shares

Best quarter during calendar years shown—3Q 2009: 8.81%
Worst quarter during calendar years shown—2Q 2013: (4.19)%

Average annual total returns (figures reflect 2% PACE Select Advisors Program Fee) (for the periods ended December 31, 2013)

Average Annual Returns Class P Prospectus PACE® Strategic Fixed Income Investments	Average Annual Returns, 1 Year	Average Annual Returns, 5 Years	Average Annual Returns, 10 Years	Average Annual Returns, Inception Date
Class P	(6.05%)	5.77%	3.91%	Aug. 24, 1995
Class P After Taxes on Distributions	(7.80%)	3.76%	1.86%
Class P After Taxes on Distributions and Sale of Fund Shares	(2.95%)	3.86%	2.34%
Class P Barclays US Government/ Credit Index (Index reflects no deduction for fees, expenses or taxes.)	(2.35%)	4.40%	4.52%

XML

Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

PACE® Alternative Strategies Investments

Objective [Heading]

rr_ObjectiveHeading

Investment objective

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

Long-term 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. You may qualify for sales charge discounts on purchases of Class A shares if you or your family invest, or agree to invest in the future, at least $50,000 in the UBS family of funds. More information about these and other discounts and waivers, as well as eligibility requirements for each share class, is available from your financial advisor and in "Managing your fund account" on page 109 of the prospectus and in "Reduced sales charges, additional purchase, exchange and redemption information and other services" on page 208 of the fund's Statement of Additional Information.

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)

Fee Waiver or Reimbursement over Assets, Date of Termination

rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination

2015-03-31

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 140% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

140.00%

Acquired Fund Fees and Expenses, Based on Estimates [Text]

rr_AcquiredFundFeesAndExpensesBasedOnEstimates

These "Acquired fund fees and expenses" are based on estimated amounts for the current fiscal year.

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 unless otherwise stated. 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

The fund has a broad investment mandate that permits it to use an extensive range of investment strategies and to invest in a wide spectrum of equity, fixed income and derivative securities in pursuing its investment objective. The fund seeks to provide investors a well diversified portfolio intended to provide participation in growing markets over a full market cycle while limiting large losses in more volatile and declining markets. The fund may pursue its investment objective by implementing a broad and diversified array of liquid alternative strategies, including, but not limited to, strategies that are not currently employed by the fund.

The fund invests in equity securities of US and non-US companies of various market capitalizations. The fund also invests in fixed income securities, which are not subject to any credit rating or maturity limitations, issued by companies and government and supranational entities around the world. The fund may invest in emerging as well as developed markets and may invest a significant portion of its assets in the securities of companies in particular economic sectors. The fund may also invest in the securities of other investment companies, including exchange-traded funds ("ETFs").

The fund may, but is not required to, invest extensively in exchange-traded or over-the-counter derivative instruments for risk management purposes or to attempt to increase total returns. The derivatives in which the fund may invest include options (on indices), futures (on indices), currency forward agreements and swap agreements (specifically, interest rate swaps). These derivatives may be used for risk management purposes, such as hedging the fund's security, index, currency, interest rate or other exposure, or otherwise managing the risk profile of the fund. In addition, the derivative instruments listed above may be used to enhance returns; in place of direct investments; to obtain or adjust exposure to certain markets; or to establish net short positions in markets, currencies or securities. Futures on indices and interest rate swaps may also be used to adjust the fund's portfolio duration, or to achieve a negative portfolio duration.

The fund is also permitted to engage in "short-selling." When selling short, 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 the security to the lender. Short selling provides opportunities to increase the fund's total returns, but also entails significant potential risks.

The fund's investment strategies may result in high portfolio turnover.

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, currently serves as one of the fund's investment advisors (i.e., it allocates a portion of the fund's assets to other unaffiliated pooled investment vehicles and index futures) and has the ultimate authority, subject to oversight by the fund's board, to oversee the fund's other investment advisor(s) and recommend their hiring, termination and replacement. In addition to UBS Global AM, Analytic Investors, LLC ("Analytic Investors"), First Quadrant L.P. ("First Quadrant") and Standard Life Investments (Corporate Funds) Limited ("Standard Life Investments") currently serve as the fund's other investment advisors. The allocation of the fund's assets between investment advisors is designed to achieve long-term capital appreciation while having a low correlation to traditional equity and fixed income asset classes. Subject to approval by the fund's board of trustees, UBS Global AM may in the future allocate assets to additional or different investment advisors to employ other portfolio management strategies, and changes to current strategies may be made.

Analytic Investors employs a long/short global equity strategy. This strategy is implemented by taking long and short positions of equity securities publicly traded in the US and in foreign markets by direct equity investment (and may also be implemented through the use of derivatives). The fund buys securities "long" that Analytic Investors believes will out-perform the market, and sells securities "short" that Analytic believes will under-perform the market. This is, however, not a market neutral strategy. The fund's long-short exposure will vary over time based on Analytic Investors' assessment of market conditions and other factors.

First Quadrant employs a "global macro strategy." This strategy is implemented by combining several different complex investment techniques. First Quadrant uses a "tactical risk allocation" approach across global markets which increases investment risk where it believes opportunities for risk-adjusted profit are high and attempts to lower market risks when it believes gains have been realized and future gains are less likely. First Quadrant also assesses the combination of local market and economic factors as well as global equity, fixed income or currency market factors and attempts to capture inefficiencies in those markets. First Quadrant's strategy is primarily implemented through the use of derivatives, and First Quadrant seldom holds securities "long." It uses exchange traded futures on global equity indices and government bonds, forwards, swaps and exchange traded options such as options on indices. By using derivatives, First Quadrant intends to quickly and efficiently gain market exposure to equity securities, fixed income securities, foreign currencies, and options and seeks to take advantage of value (and to reduce exposure to certain risks) that it identifies in these global markets. The fund also may hold cash or invest its cash balances at such times and in any permissible investments deemed appropriate by First Quadrant.

First Quadrant presently manages two separate portions of the fund's assets, using the strategies and investments described above. With respect to the first portion, First Quadrant seeks positive absolute returns from its global macro strategy, and the returns of this portion are not expected to be closely correlated with those of global equity markets. With respect to the second portion, First Quadrant combines its global macro strategy with passive exposure to global equity markets while targeting a specific level of active risk, which is expected to result in returns more closely correlated with those of global equity markets.

Standard Life Investments employs a "global multi-asset strategy" and seeks to achieve a total return by delivering a diversified global portfolio that makes use of multiple strategies across various asset classes. It aims to exploit market cyclicality and a diverse array of inefficiencies across and within global markets to maximize risk adjusted absolute return, by investing in listed equity, equity-related and debt securities, including exchange traded funds, and derivatives or other instruments, both for investment and hedging purposes. The fund may take long and/or short positions, and its derivative investments (which may be used routinely) may include futures, options, swaps, and forward currency contracts.

Standard Life Investments manages its strategies dynamically over time, and will actively modify investment strategies and develop new strategies in response to additional research, changing market conditions, or other factors. Its strategies seek to deliver returns commensurate with reasonable levels of risk and tangible diversification benefits, while having both sufficient liquidity and capacity to benefit the fund in a significant way. Standard Life Investments may also hold cash or invest its cash balances in cash equivalents and short-term investments, in order to cover the derivative transactions or otherwise in its discretion.

UBS Global AM allocates a portion of the fund's assets primarily to unaffiliated actively- and passively-managed pooled investment vehicles, including ETFs, that it believes are suitable for return generation, risk management (e.g., increased portfolio diversification), or both. In addition, UBS Global AM may invest in index futures primarily for cash management (i.e., to obtain certain market exposures in the fund and reduce cash holdings) and risk management purposes. UBS Global AM generally invests in other unaffiliated pooled investment vehicles and index futures that have risk and return objectives that are deemed to be complementary to the other investments and strategies within the fund overall.

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:

Aggressive investment risk: The fund may employ investment strategies that involve greater risks than the strategies used by typical mutual funds, including increased use of short sales (which involve the risk of an unlimited increase in the market value of the security sold short, which could result in a theoretically unlimited loss), leverage and derivative transactions, and hedging strategies.

Arbitrage trading risk: The underlying relationships between securities in which the fund takes arbitrage investment positions may change in an adverse manner, causing the fund to realize losses.

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.

Derivatives risk: The value of "derivatives"—so called because their value "derives" from the value of an underlying asset, reference rate or index—may rise or fall more rapidly than other investments. When using derivatives for non-hedging purposes, it is possible for the fund to lose more than the amount it invested in the derivative. When using derivatives for hedging purposes, the fund's overall returns may be reduced if the hedged investment experiences a favorable price movement. The risks of investing in derivative instruments also include market and management risks. Derivatives relating to fixed income markets are especially susceptible to interest rate risk and credit risk. In addition, many types of swaps and other non-exchange traded derivatives may be subject to liquidity risk, counterparty risk, credit risk and mispricing or valuation complexity. These derivatives risks are different from, and may be greater than, the risks associated with investing directly in securities and other instruments.

Swap agreement risk: The fund may enter into various types of swap agreements. Swap agreements can be less liquid and more difficult to value than other investments. Because its cash flows are based in part on changes in the value of the reference asset, a total return swap's market value will vary with changes in that reference asset. In addition, the fund may experience delays in payment or loss of income if the counterparty fails to perform under the contract.

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 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 declines against the US dollar, the value of the holding decreases 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.

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.

High yield securities ("junk bonds") risk: Lower-rated securities (the issuers of which are typically in poor financial health) are subject to higher risks than investment grade securities. For example, lower-rated securities may be (1) subject to a greater risk of loss of principal and non-payment of interest (including default by the issuer); (2) subject to greater price volatility; and (3) less liquid than investment grade securities. The prices of such securities may be more vulnerable to bad economic news, or even the expectation of bad news, than higher rated fixed income securities.

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.

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.

Leverage risk associated with financial instruments: The use of financial instruments to increase potential returns, including derivatives used for investment (non-hedging) purposes, may cause the fund to be more volatile than if it had not been leveraged. The use of leverage may also accelerate the velocity of losses and can result in losses to the fund that exceed the amount originally invested.

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.

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.

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.

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.

Structured security risk: The fund may purchase securities representing interests in underlying assets, but structured to provide certain advantages not inherent in those assets (e.g., enhanced liquidity and yields linked to short-term interest rates). If those securities behaved in a way that the fund's investment advisors did not anticipate, or if the security structures encountered unexpected difficulties, the fund could suffer a loss.

Valuation risk: During periods of reduced market liquidity or in the absence of readily available market quotations for securities, the ability of the fund to value the fund's securities becomes more difficult and the judgment of the fund's manager and investment advisors may play a greater role in the valuation of the securities due to reduced availability of reliable objective pricing data.

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.

Management risk: The risk that the investment strategies, techniques and risk analyses employed by an investment advisor may not produce the desired results.

Investment company risk: Investments in open- or closed-end investment companies, including exchange-traded funds, 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.

Risk Lose Money [Text]

rr_RiskLoseMoney

You may lose money by investing in the fund.

Risk Nondiversified Status [Text]

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 [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 sales charges of the fund's Class C shares; 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 Barclays Global Aggregate Index shows how the fund's performance compares to the broad global markets for US and non-US corporate, government, governmental agency, supranational, mortgage-backed and asset-backed fixed income securities. The MSCI World Free Index (net) shows how the fund is performing against a diversified global equity index (an asset class in which the fund invests). The HFRI Fund of Funds Composite Index shows how the fund is performing against a broad measure of hedge fund returns. Life of class performance for the indices is as of the inception month-end of each class. The fund's past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future. Analytic Investors has been responsible for the day-to-day management of a separate portion of the fund's assets since inception of the fund. First Quadrant assumed day-to-day management of a separate portion of the fund's assets on April 8, 2009. Standard Life Investments assumed day-to-day management of a separate portion of the fund's assets on August 5, 2010. UBS Global AM assumed day-to-day management of a separate portion of the fund's assets (i.e., investing in other unaffiliated pooled investment vehicles and index futures) on March 31, 2014. Prior to that, other investment advisors have managed portions of 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. After-tax returns for other classes will vary from the Class C shares' after-tax returns shown.

Performance Information Illustrates Variability of Returns [Text]

rr_PerformanceInformationIllustratesVariabilityOfReturns

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.

Performance Additional Market Index [Text]

rr_PerformanceAdditionalMarketIndex

The Barclays Global Aggregate Index shows how the fund's performance compares to the broad global markets for US and non-US corporate, government, governmental agency, supranational, mortgage-backed and asset-backed fixed income securities. The MSCI World Free Index (net) shows how the fund is performing against a diversified global equity index (an asset class in which the fund invests). The HFRI Fund of Funds Composite Index shows how the fund is performing against a broad measure of hedge fund returns.

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 Alternative Strategies Investments Annual Total Returns of Class C Shares (2007 was Class C's first full calendar year of operations)

Bar Chart Does Not Reflect Sales Loads [Text]

rr_BarChartDoesNotReflectSalesLoads

The bar chart does not reflect the sales charges of the fund's Class C shares; if it did, the total returns shown would be lower.

Bar Chart Closing [Text Block]

rr_BarChartClosingTextBlock

Best quarter during calendar years shown—2Q 2009: 7.27%
Worst quarter during calendar years shown—3Q 2008: (12.12)%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Best quarter during calendar years shown

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Jun. 30, 2009

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

7.27%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Worst quarter during calendar years shown

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Sep. 30, 2008

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(12.12%)

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.

Performance Table One Class of after Tax Shown [Text]

rr_PerformanceTableOneClassOfAfterTaxShown

After-tax returns for other classes will vary from the Class C shares' after-tax returns shown.

Caption

rr_AverageAnnualReturnCaption

Average annual total returns (figures reflect sales charges) (for the periods ended December 31, 2013)

Citigroup Three-Month US Treasury Bill Index (Index reflects no deduction for fees, expenses or taxes.)

Risk/Return:

rr_RiskReturnAbstract

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

0.05%

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

0.10%

Average Annual Returns, Life of Class

rr_AverageAnnualReturnSinceInception

^[1]

Barclays Global Aggregate Index (Index reflects no deduction for fees, expenses or taxes.)

Risk/Return:

rr_RiskReturnAbstract

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

(2.60%)

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

3.91%

Average Annual Returns, Life of Class

rr_AverageAnnualReturnSinceInception

^[2]

MSCI World Free Index (net) (Index reflects no deduction for fees and expenses.)

Risk/Return:

rr_RiskReturnAbstract

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

26.68%

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

15.02%

Average Annual Returns, Life of Class

rr_AverageAnnualReturnSinceInception

^[3]

HFRI Fund of Funds Composite Index (Index reflects no deduction for fees, expenses or taxes.)

Risk/Return:

rr_RiskReturnAbstract

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

8.74%

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

4.83%

Average Annual Returns, Life of Class

rr_AverageAnnualReturnSinceInception

^[4]

Class A

Risk/Return:

rr_RiskReturnAbstract

Maximum front-end sales charge (load) imposed on purchases (as a % of the offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

5.50%

Maximum deferred sales charge (load) (as a % of the lesser of the offering price or the redemption price)

rr_MaximumDeferredSalesChargeOverOther

none

Redemption Fee (as a percentage of Amount Redeemed)

rr_RedemptionFeeOverRedemption

(1.00%)

Exchange fee

rr_ExchangeFeeOverRedemption

none

Management fees

rr_ManagementFeesOverAssets

1.30%

Distribution and/or service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Miscellaneous expenses (includes administration fee of 0.10%)

rr_Component1OtherExpensesOverAssets

0.38%

Dividend expense, borrowing costs and related interest expense attributable to securities sold short

rr_Component2OtherExpensesOverAssets

0.08%

Other expenses (includes administration fee of 0.10%)

rr_OtherExpensesOverAssets

0.46%

Acquired fund fees and expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.16%

^[5]

Total annual fund operating expenses

rr_ExpensesOverAssets

2.17%

Fee Waiver or Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.10%)

^[6]

Total annual fund operating expenses after fee waiver and/or expense reimbursements

rr_NetExpensesOverAssets

2.07%

^[6]

Expense Breakpoint Discounts [Text]

rr_ExpenseBreakpointDiscounts

You may qualify for sales charge discounts on purchases of Class A shares if you or your family invest, or agree to invest in the future, at least $50,000 in the UBS family of funds.

Expense Breakpoint, Minimum Investment Required [Amount]

rr_ExpenseBreakpointMinimumInvestmentRequiredAmount

$ 50,000

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

748

^[7]

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

1,183

^[7]

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

1,642

^[7]

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

2,908

^[7]

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

3.49%

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

4.36%

Average Annual Returns, Life of Class

rr_AverageAnnualReturnSinceInception

0.77%

Average Annual Returns, Inception Date

rr_AverageAnnualReturnInceptionDate

Apr. 10, 2006

Class C

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 lesser of the offering price or the redemption price)

rr_MaximumDeferredSalesChargeOverOther

1.00%

Redemption Fee (as a percentage of Amount Redeemed)

rr_RedemptionFeeOverRedemption

(1.00%)

Exchange fee

rr_ExchangeFeeOverRedemption

none

Management fees

rr_ManagementFeesOverAssets

1.30%

Distribution and/or service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

1.00%

Miscellaneous expenses (includes administration fee of 0.10%)

rr_Component1OtherExpensesOverAssets

0.34%

Dividend expense, borrowing costs and related interest expense attributable to securities sold short

rr_Component2OtherExpensesOverAssets

0.08%

Other expenses (includes administration fee of 0.10%)

rr_OtherExpensesOverAssets

0.42%

Acquired fund fees and expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.16%

^[5]

Total annual fund operating expenses

rr_ExpensesOverAssets

2.88%

Fee Waiver or Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.10%)

^[6]

Total annual fund operating expenses after fee waiver and/or expense reimbursements

rr_NetExpensesOverAssets

2.78%

^[6]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

381

^[7]

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

882

^[7]

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

1,510

^[7]

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

3,197

^[7]

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

281

^[7]

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

882

^[7]

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

1,510

^[7]

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

3,197

^[7]

Annual Return 2007

rr_AnnualReturn2007

6.77%

Annual Return 2008

rr_AnnualReturn2008

(24.87%)

Annual Return 2009

rr_AnnualReturn2009

10.57%

Annual Return 2010

rr_AnnualReturn2010

2.93%

Annual Return 2011

rr_AnnualReturn2011

(4.87%)

Annual Return 2012

rr_AnnualReturn2012

7.40%

Annual Return 2013

rr_AnnualReturn2013

8.69%

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

7.69%

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

4.79%

Average Annual Returns, Life of Class

rr_AverageAnnualReturnSinceInception

0.83%

Average Annual Returns, Inception Date

rr_AverageAnnualReturnInceptionDate

Apr. 11, 2006

Class C | After Taxes on Distributions

Risk/Return:

rr_RiskReturnAbstract

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

7.20%

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

4.68%

Average Annual Returns, Life of Class

rr_AverageAnnualReturnSinceInception

0.65%

Class C | After Taxes on Distributions and Sale of Fund Shares

Risk/Return:

rr_RiskReturnAbstract

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

4.42%

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

3.69%

Average Annual Returns, Life of Class

rr_AverageAnnualReturnSinceInception

0.59%

Class Y

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 lesser of the offering price or the redemption price)

rr_MaximumDeferredSalesChargeOverOther

none

Redemption Fee (as a percentage of Amount Redeemed)

rr_RedemptionFeeOverRedemption

(1.00%)

Exchange fee

rr_ExchangeFeeOverRedemption

none

Management fees

rr_ManagementFeesOverAssets

1.30%

Distribution and/or service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

none

Miscellaneous expenses (includes administration fee of 0.10%)

rr_Component1OtherExpensesOverAssets

0.39%

Dividend expense, borrowing costs and related interest expense attributable to securities sold short

rr_Component2OtherExpensesOverAssets

0.08%

Other expenses (includes administration fee of 0.10%)

rr_OtherExpensesOverAssets

0.47%

Acquired fund fees and expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.16%

^[5]

Total annual fund operating expenses

rr_ExpensesOverAssets

1.93%

Fee Waiver or Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.10%)

^[6]

Total annual fund operating expenses after fee waiver and/or expense reimbursements

rr_NetExpensesOverAssets

1.83%

^[6]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

186

^[7]

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

596

^[7]

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

1,033

^[7]

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 2,246

^[7]

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

9.86%

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

5.79%

Average Annual Returns, Life of Class

rr_AverageAnnualReturnSinceInception

1.01%

Average Annual Returns, Inception Date

rr_AverageAnnualReturnInceptionDate

Jul. 23, 2008

[1] Average annual total returns for the Citigroup Three-Month US Treasury Bill Index for the life of each class were as follows: Class A-1.33%; Class C-1.33%; Class Y-0.19%.

[2] Average annual total returns for the Barclays Global Aggregate Index for the life of each class were as follows: Class A-5.02%; Class C-5.02%; Class Y-3.81%.

[3] Average annual total returns for the MSCI World Free Index (net) for the life of each class were as follows: Class A-4.71%; Class C-4.71%; Class Y-5.96%.

[4] Average annual total returns for the HFRI Fund of Funds Composite Index for the life of each class were as follows: Class A-1.65%;Class C-1.65%; Class Y-0.86%.

[5] These "Acquired fund fees and expenses" are based on estimated amounts for the current fiscal year. Since the "Acquired fund fees and expenses" are not directly borne by the fund, they are not reflected in the fund's financial statements, and therefore the amounts listed in "Total annual fund operating expenses" and "Total annual fund operating expenses after fee waiver and/or expense reimbursements" will differ from those presented in the Financial highlights.

[6] 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 through March 31, 2015 to the extent necessary to offset the cost savings to UBS Global AM for allocating a portion of the fund's assets to other unaffiliated pooled investment vehicles and index futures. 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.

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

XML

Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

PACE® International 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)

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 lesser of the offering price or the redemption price)

rr_MaximumDeferredSalesChargeOverOther

none

Redemption Fee (as a percentage of Amount Redeemed)

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%

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)

Management fees

rr_ManagementFeesOverAssets

0.79%

Distribution and/or service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

none

Miscellaneous expenses (includes administration fee of 0.10%)

rr_Component1OtherExpensesOverAssets

0.38%

Dividend expense, borrowing costs and related interest expense attributable to securities sold short

rr_Component2OtherExpensesOverAssets

0.41%

^[1]

Other expenses (includes administration fee of 0.10%)

rr_OtherExpensesOverAssets

0.79%

Total annual fund operating expenses

rr_ExpensesOverAssets

1.58%

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 36% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

36.00%

Other Expenses, New Fund, Based on Estimates [Text]

rr_OtherExpensesNewFundBasedOnEstimates

These "Dividend expense, borrowing costs and related interest expense attributable to securities sold short" are based on estimates and may vary based on actual investments.

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:

Expense Example, with Redemption, 1 Year

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$ 361

Expense Example, with Redemption, 3 Years

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1,097

Expense Example, with Redemption, 5 Years

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1,855

Expense Example, with Redemption, 10 Years

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$ 3,845

Strategy [Heading]

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Principal strategies

Strategy Narrative [Text Block]

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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. The fund invests primarily in stocks of companies that are domiciled in developed foreign countries and principally traded in Japanese, European, Pacific and Australian securities markets or traded in US securities markets. Such investments may include common stocks, which may or may not pay dividends, and securities convertible into common stocks, of companies domiciled outside the US.

The fund may invest, to a limited extent, in (1) stocks of companies in emerging markets, including Asia, Latin America and other regions where markets may not yet fully reflect the potential of the developing economy, and (2) securities of other investment companies that invest in foreign markets and securities convertible into stocks, including convertible bonds that are below investment grade. The fund may, but is not required to, use exchange-traded or over-the-counter derivative instruments for risk management purposes or to attempt to increase total returns. The derivatives in which the fund may invest include currency forward agreements. These derivatives may be used for risk management purposes, such as hedging the fund's currency exposure. In addition, these derivative instruments may be used to obtain or adjust exposure to certain markets.

The fund is also permitted to engage in "short-selling." When selling short, 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 the security to the lender. The fund may also invest the proceeds received upon the initial sale of the security, resulting in leverage and increasing the fund's return and loss potential. Short selling provides opportunities to increase the fund's total returns, but also entails significant potential risks.

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"), Los Angeles Capital Management and Equity Research, Inc. ("Los Angeles Capital") and Chautauqua Capital Management, LLC ("Chautauqua") 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.

Los Angeles Capital employs a "long/short" or "130/30" equity strategy. Los Angeles Capital buys securities "long" that it believes will outperform the market or decrease portfolio risk, and sells securities "short" that it believes will underperform the market.

When Los Angeles Capital sells a security short, it may invest the proceeds from that sale in additional securities. (For example, if Los Angeles Capital were responsible for $100 of fund assets, it may take traditional long positions in equity securities with the full $100, borrow and sell short $30 of equity securities, and also invest long the $30 received upon the initial short sale, resulting in long/short equity exposure, as percentages of its assets, of "130/30".) Los Angeles Capital uses a proprietary quantitative model that includes fundamental data inputs for a universe of global equity securities and, through the use of statistical tools, estimates expected returns based on each security's risk characteristics and the expected return to each characteristic in the current market environment. Security weights, both long and short, are assigned through an integrated optimization process which identifies the portfolio with the highest expected return for an acceptable level of risk. Los Angeles Capital also employs monitoring tools and certain additional constraints to ensure compliance with global short sale regulations. Los Angeles Capital seeks to generate incremental investment returns above the fund's benchmark, while attempting to control investment risk relative to the benchmark. While Los Angeles Capital does not set price targets or valuation constraints, it will sell or short sell a security if it no longer has the desired risk characteristics, or if there are concerns about a particular company's merits. Los Angeles Capital closely monitors its short positions and borrowing costs.

Chautauqua endeavors to achieve consistent risk adjusted excess returns by managing a concentrated portfolio of 25-35 quality, growth companies generally headquartered outside of the United States. The portfolio consists of a carefully diversified set of best idea equities that Chautauqua believes will benefit from long-term trends, have sustainable competitive advantages and exhibit growth that should outpace the market. Companies are valued based on a forward looking cash flow analysis. When selecting investments, Chautauqua has a long-term time horizon.

Risk [Heading]

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Principal risks

Risk Narrative [Text Block]

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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.

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 declines against the US dollar, the value of the holding decreases 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.

Derivatives risk: The value of "derivatives"—so called because their value "derives" from the value of an underlying asset, reference rate or index—may rise or fall more rapidly than other investments. When using derivatives for non-hedging purposes, it is possible for the fund to lose more than the amount it invested in the derivative. When using derivatives for hedging purposes, the fund's overall returns may be reduced if the hedged investment experiences a favorable price movement. The risks of investing in derivative instruments also include market and management risks. In addition, many types of non-exchange traded derivatives may be subject to liquidity risk, counterparty risk, credit risk and mispricing or valuation complexity. These derivatives risks are different from, and may be greater than, the risks associated with investing directly in securities and other instruments.

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.

Management risk: The risk that the investment strategies, techniques and risk analyses employed by an investment advisor may not produce the desired results.

Leverage risk associated with financial instruments and practices: The use of financial instruments, including derivatives used for investment (non-hedging) purposes, and the engagement in certain practices, such as the investment of proceeds received in short sales, to increase potential returns may cause the fund to be more volatile than if it had not been leveraged. The use of leverage may also accelerate the velocity of losses and can result in losses to the fund that exceed the amount originally invested.

Short sales risk: There are certain unique risks associated with the use of short sales strategies. When selling a security short, the 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 securi- ties sold short increases, thereby increasing the potential for loss.

Risk Lose Money [Text]

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You may lose money by investing in the fund.

Risk Not Insured Depository Institution [Text]

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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]

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Performance

Performance Narrative [Text Block]

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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 April 1, 2004. Chautauqua assumed day-to-day management of a separate portion of the fund's assets on August 5, 2013. Los Angeles Capital assumed day-to-day management of another portion of the fund's assets on September 13, 2013. 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]

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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.

Performance Availability Website Address [Text]

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http://globalam-us.ubs.com/corpweb/performance.do

Performance Past Does Not Indicate Future [Text]

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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]

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PACE International Equity Investments Annual Total Returns of Class P Shares

Bar Chart Does Not Reflect Sales Loads [Text]

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The bar chart does not reflect the maximum annual PACE Select Advisors Program fee; if it did, the total returns shown would be lower.

Annual Return 2004

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18.62%

Annual Return 2005

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14.00%

Annual Return 2006

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28.46%

Annual Return 2007

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11.08%

Annual Return 2008

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(43.85%)

Annual Return 2009

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25.81%

Annual Return 2010

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4.08%

Annual Return 2011

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(9.84%)

Annual Return 2012

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17.24%

Annual Return 2013

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19.95%

Bar Chart Closing [Text Block]

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Best quarter during calendar years shown—2Q 2009: 22.85%
Worst quarter during calendar years shown—4Q 2008: (19.94)%

Highest Quarterly Return, Label

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Best quarter during calendar years shown

Highest Quarterly Return, Date

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Jun. 30, 2009

Highest Quarterly Return

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22.85%

Lowest Quarterly Return, Label

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Worst quarter during calendar years shown

Lowest Quarterly Return, Date

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Dec. 31, 2008

Lowest Quarterly Return

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(19.94%)

Index No Deduction for Fees, Expenses, Taxes [Text]

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(Index reflects no deduction for fees and expenses.)

Performance Table Uses Highest Federal Rate

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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

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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

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Average annual total returns (figures reflect 2% PACE Select Advisors Program Fee) (for the periods ended December 31, 2013)

Average Annual Returns, 1 Year

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17.57%

Average Annual Returns, 5 Years

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8.48%

Average Annual Returns, 10 Years

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3.94%

Average Annual Returns, Inception Date

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Aug. 24, 1995

After Taxes on Distributions

Risk/Return:

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Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

17.07%

Average Annual Returns, 5 Years

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8.08%

Average Annual Returns, 10 Years

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3.28%

After Taxes on Distributions and Sale of Fund Shares

Risk/Return:

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Average Annual Returns, 1 Year

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10.47%

Average Annual Returns, 5 Years

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6.82%

Average Annual Returns, 10 Years

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3.49%

MSCI EAFE Index (net) (Index reflects no deduction for fees, expenses or taxes.)

Risk/Return:

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Average Annual Returns, 1 Year

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22.78%

Average Annual Returns, 5 Years

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12.44%

Average Annual Returns, 10 Years

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6.91%

[1] These "Dividend expense, borrowing costs and related interest expense attributable to securities sold short" are based on estimates and may vary based on actual investments.

XML

Label

Element

Value

Risk/Return:

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Risk/Return [Heading]

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PACE® Large Co Growth Equity Investments

Objective [Heading]

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Investment objective

Objective, Primary [Text Block]

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Capital appreciation.

Expense [Heading]

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Fees and expenses of the fund

Expense Narrative [Text Block]

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These tables describe the fees and expenses that you may pay if you buy and hold shares of the fund. You may qualify for sales charge discounts on purchases of Class A shares if you or your family invest, or agree to invest in the future, at least $50,000 in the UBS family of funds. More information about these and other discounts and waivers, as well as eligibility requirements for each share class, is available from your financial advisor and in "Managing your fund account" on page 109 of the prospectus and in "Reduced sales charges, additional purchase, exchange and redemption information and other services" on page 208 of the fund's Statement of Additional Information.

Shareholder Fees Caption [Text]

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Shareholder fees (fees paid directly from your investment)

Operating Expenses Caption [Text]

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Annual fund operating expenses (expenses that you pay each year as a percentage of the value of your investment)

Portfolio Turnover [Heading]

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Portfolio turnover

Portfolio Turnover [Text Block]

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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 76% of the average value of its portfolio.

Portfolio Turnover, Rate

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76.00%

Expense Example [Heading]

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Example

Expense Example Narrative [Text Block]

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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 unless otherwise stated. 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]

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Principal strategies

Strategy Narrative [Text Block]

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Principal investments

The fund invests primarily in stocks of companies that are believed to have substantial potential for capital growth. 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 issued by large capitalization companies. As of the date of this prospectus, large capitalization companies means companies with a total market capitalization of $3.0 billion or greater at the time of purchase. Effective April 28, 2014, large capitalization companies means companies with a total market capitalization within the market capitalization range of the companies in the Russell 1000^® Growth Index at the time of purchase. Dividend income is an incidental consideration in the investment advisors' selection of stocks for the fund.

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 healthcare or technology. The fund may also invest, to a lesser extent, in other securities such as securities convertible into stocks, fixed income securities, initial public offerings ("IPOs") and stocks of companies with smaller total market capitalizations. The fund may invest up to 20% of its total assets in non-US securities, which may trade either within or outside the US.

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. Delaware Investments Fund Advisers ("Delaware"), Roxbury Capital Management, LLC ("Roxbury") and J.P. Morgan Investment Management Inc. ("J.P. Morgan") 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.

Delaware invests primarily in common stocks of large capitalization growth-oriented companies that Delaware believes have long-term capital appreciation potential and are expected to grow faster than the US economy. It uses a bottom-up approach, seeking companies that have large-end market potential, dominant business models and strong free cash flow generation that are attractively priced compared to the intrinsic value of the securities. Delaware tends to hold a relatively focused portfolio with a limited number of stocks.

Roxbury's strategy employs a bottom-up approach to stock selection, seeking high quality growth companies whose stocks are trading at discounts to fair value. Roxbury looks for companies with sustainable competitive advantages and opportunities to grow and reinvest capital at higher rates than their cost of capital, as well as companies with management teams with a proven ability to maximize shareholder value. Roxbury evaluates companies as private entities to determine their intrinsic worth and uses scenario analysis to determine a "margin of safety," or discount to intrinsic value, as a means of protecting capital. Roxbury typically sells a stock if (1) the market price exceeds Roxbury's estimate of intrinsic value; (2) the company's fundamentals fall short of Roxbury's investment thesis; or (3) when there are more attractive investment alternatives. Roxbury may invest in a limited number of stocks that it believes have attractive risk-reward profiles, and this may also result in significant weights in a sector.

J.P. Morgan invests primarily in a focused portfolio of equity securities of large capitalization companies. Although J.P. Morgan will invest primarily in equity securities of U.S. companies, it may invest in foreign securities, including depositary receipts. In selecting investments, J.P. Morgan utilizes a combination of qualitative analysis and quantitative metrics in order to seek to achieve target returns which are higher than those of the fund's benchmark while attempting to maintain a moderate risk profile. J.P. Morgan employs a process that combines research, valuation and stock selection to identify companies that have a history of above-average growth or which it believes will achieve above-average growth in the future, and looks for companies with leading competitive positions, predictable and durable business models and management that can achieve sustained growth. J.P. Morgan may sell a security: due to a change in the company's fundamentals or a change in the original reason for purchase of an investment; if it no longer considers the security to be reasonably valued; or if it identifies a stock that it believes offers a better investment opportunity.

Risk [Heading]

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Principal risks

Risk Narrative [Text Block]

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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.

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.

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.

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.

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.

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 [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]

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Performance

Performance Narrative [Text Block]

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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 sales charges of the fund's Class C shares; 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. Delaware assumed responsibility for managing a separate portion of the fund's assets on December 5, 2007. Roxbury assumed responsibility for managing a separate portion of the fund's assets on May 25, 2010. J.P. Morgan assumed day-to-day management of a separate portion of the fund's assets on October 5, 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. After-tax returns for other classes will vary from the Class C shares' after-tax returns shown.

Performance Information Illustrates Variability of Returns [Text]

rr_PerformanceInformationIllustratesVariabilityOfReturns

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.

Performance Availability Website Address [Text]

rr_PerformanceAvailabilityWebSiteAddress

http://globalam-us.ubs.com/corpweb/performance.do

Performance Past Does Not Indicate Future [Text]

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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]

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PACE Large Co Growth Equity Invesments Annual Total Returns of Class C Shares

Bar Chart Does Not Reflect Sales Loads [Text]

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The bar chart does not reflect the sales charges of the fund's Class C shares; if it did, the total returns shown would be lower.

Bar Chart Closing [Text Block]

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Best quarter during calendar years shown—1Q 2012: 16.07%
Worst quarter during calendar years shown—4Q 2008: (21.54)%

Highest Quarterly Return, Label

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Best quarter during calendar years shown

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Mar. 31, 2012

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

16.07%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Worst quarter during calendar years shown

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Dec. 31, 2008

Lowest Quarterly Return

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(21.54%)

Index No Deduction for Fees, Expenses, Taxes [Text]

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(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.

Performance Table One Class of after Tax Shown [Text]

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After-tax returns for other classes will vary from the Class C shares' after-tax returns shown.

Russell 1000 Growth Index (Index reflects no deduction for fees, expenses or taxes.)

Risk/Return:

rr_RiskReturnAbstract

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

33.48%

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

20.39%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

7.83%

CLASS A

Risk/Return:

rr_RiskReturnAbstract

Maximum front-end sales charge (load) imposed on purchases (as a % of the offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

5.50%

Maximum deferred sales charge (load) (as a % of the lesser of the offering price or the redemption price)

rr_MaximumDeferredSalesChargeOverOther

none

Redemption Fee (as a percentage of Amount Redeemed)

rr_RedemptionFeeOverRedemption

(1.00%)

Exchange fee

rr_ExchangeFeeOverRedemption

none

Management fees

rr_ManagementFeesOverAssets

0.68%

Distribution and/or service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Other expenses (includes administration fee of 0.10%)

rr_OtherExpensesOverAssets

0.28%

Total annual fund operating expenses

rr_ExpensesOverAssets

1.21%

Expense Breakpoint Discounts [Text]

rr_ExpenseBreakpointDiscounts

You may qualify for sales charge discounts on purchases of Class A shares if you or your family invest, or agree to invest in the future, at least $50,000 in the UBS family of funds.

Expense Breakpoint, Minimum Investment Required [Amount]

rr_ExpenseBreakpointMinimumInvestmentRequiredAmount

$ 50,000

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

667

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

913

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

1,178

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,935

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

27.38%

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

17.36%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

6.45%

Average Annual Returns, Inception Date

rr_AverageAnnualReturnInceptionDate

Nov. 27, 2000

CLASS C

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 lesser of the offering price or the redemption price)

rr_MaximumDeferredSalesChargeOverOther

1.00%

Redemption Fee (as a percentage of Amount Redeemed)

rr_RedemptionFeeOverRedemption

(1.00%)

Exchange fee

rr_ExchangeFeeOverRedemption

none

Management fees

rr_ManagementFeesOverAssets

0.68%

Distribution and/or service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

1.00%

Other expenses (includes administration fee of 0.10%)

rr_OtherExpensesOverAssets

0.37%

^[1]

Total annual fund operating expenses

rr_ExpensesOverAssets

2.05%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

308

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

641

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

1,099

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

2,370

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

208

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

641

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

1,099

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

2,370

Annual Return 2004

rr_AnnualReturn2004

7.67%

Annual Return 2005

rr_AnnualReturn2005

4.23%

Annual Return 2006

rr_AnnualReturn2006

8.18%

Annual Return 2007

rr_AnnualReturn2007

10.92%

Annual Return 2008

rr_AnnualReturn2008

(40.28%)

Annual Return 2009

rr_AnnualReturn2009

32.34%

Annual Return 2010

rr_AnnualReturn2010

15.24%

Annual Return 2011

rr_AnnualReturn2011

(2.13%)

Annual Return 2012

rr_AnnualReturn2012

13.33%

Annual Return 2013

rr_AnnualReturn2013

33.71%

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

32.71%

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

17.73%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

6.16%

Average Annual Returns, Inception Date

rr_AverageAnnualReturnInceptionDate

Nov. 27, 2000

CLASS C | After Taxes on Distributions

Risk/Return:

rr_RiskReturnAbstract

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

29.70%

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

17.19%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

5.87%

CLASS C | After Taxes on Distributions and Sale of Fund Shares

Risk/Return:

rr_RiskReturnAbstract

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

20.75%

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

14.39%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

4.96%

CLASS Y

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 lesser of the offering price or the redemption price)

rr_MaximumDeferredSalesChargeOverOther

none

Redemption Fee (as a percentage of Amount Redeemed)

rr_RedemptionFeeOverRedemption

(1.00%)

Exchange fee

rr_ExchangeFeeOverRedemption

none

Management fees

rr_ManagementFeesOverAssets

0.68%

Distribution and/or service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

none

Other expenses (includes administration fee of 0.10%)

rr_OtherExpensesOverAssets

0.28%

Total annual fund operating expenses

rr_ExpensesOverAssets

0.96%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

98

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

306

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

531

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 1,178

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

35.21%

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

19.05%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

7.42%

Average Annual Returns, Inception Date

rr_AverageAnnualReturnInceptionDate

Feb. 15, 2001

[1] Includes recoupment of 0.01% from the fund's Class C shares expenses previously reimbursed by UBS Global Asset Management (Americas) Inc. ("UBS Global AM") under a written fee waiver/expense reimbursement agreement.

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A, C, Y Prospectus | PACE® Global Real Estate Securities Investments

PACE® Global Real Estate Securities Investments

Investment objective

Total return.

Fees and expenses of the fund

These tables describe the fees and expenses that you may pay if you buy and hold shares of the fund. You may qualify for sales charge discounts on purchases of Class A shares if you or your family invest, or agree to invest in the future, at least $50,000 in the UBS family of funds. More information about these and other discounts and waivers, as well as eligibility requirements for each share class, is available from your financial advisor and in "Managing your fund account" on page 109 of the prospectus and in "Reduced sales charges, additional purchase, exchange and redemption information and other services" on page 208 of the fund's Statement of Additional Information.

Shareholder fees (fees paid directly from your investment)

Shareholder Fees A, C, Y Prospectus PACE® Global Real Estate Securities Investments	Class A	Class C	Class Y
Maximum front-end sales charge (load) imposed on purchases (as a % of the offering price)	5.50%	none	none
Maximum deferred sales charge (load) (as a % of the lesser of the offering price or the redemption price)	none	1.00%	none
Exchange fee	none	none	none
Redemption fee (as a % of the amount redeemed within 90 days of purchase, if applicable)	1.00%	1.00%	1.00%

Annual fund operating expenses (expenses that you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses A, C, Y Prospectus PACE® Global Real Estate Securities Investments		Class A	Class C	Class Y
Management fees		0.70%	0.70%	0.70%
Distribution and/or service (12b-1) fees		0.25%	1.00%	none
Other expenses (includes administration fee of 0.10%)		0.61%	0.57%	0.69%
Total annual fund operating expenses		1.56%	2.27%	1.39%
Management fee waiver/expense reimbursements	[1]	0.11%	0.07%	0.19%
Total annual fund operating expenses after fee waiver and/or expense reimbursements	[1]	1.45%	2.20%	1.20%

Example

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 unless otherwise stated. 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:

Expense Example A, C, Y Prospectus PACE® Global Real Estate Securities Investments (USD $)		1 year	3 years	5 years	10 years
Class A	[1]	689	1,005	1,343	2,296
Class C	[1]	323	703	1,209	2,600
Class Y	[1]	122	421	742	1,652

Expense Example No Redemption (USD $)		1 year	3 years	5 years	10 years
A, C, Y Prospectus PACE® Global Real Estate Securities Investments Class C	[1]	223	703	1,209	2,600

Portfolio turnover

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 92% of the average value of its portfolio.

Principal strategies

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

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. CBRE Clarion 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).

Principal risks

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. 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.

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.

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.

Performance

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 sales charges of the fund's Class C shares; 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. After-tax returns for other classes will vary from the Class C shares' after-tax returns shown.

PACE Global Real Estate Securities Investments Annual Total Returns of Class C Shares (2007 was Class C's first full calendar year of operations)

Best quarter during calendar years shown—2Q 2009: 25.64%
Worst quarter during calendar years shown—4Q 2008: (33.27)%

Average annual total returns (figures reflect sales charges) (for the periods ended December 31, 2013)

Average Annual Returns A, C, Y Prospectus PACE® Global Real Estate Securities Investments	Average Annual Returns, 1 Year	Average Annual Returns, 5 Years	Average Annual Returns, Life of Class		Average Annual Returns, Inception Date
Class A	(1.89%)	11.85%	(2.46%)		Dec. 18, 2006
Class C	1.88%	12.22%	(2.46%)		Dec. 18, 2006
Class Y	4.07%	13.44%	14.05%		Dec. 26, 2008
After Taxes on Distributions Class C	1.39%	10.61%	(3.60%)
After Taxes on Distributions and Sale of Fund Shares Class C	1.07%	9.06%	(2.26%)
FTSE EPRA/NAREIT Developed Index (Index reflects no deduction for fees, expenses or taxes.)	4.39%	16.06%		[1]

[1] 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 of each class through March 31, 2015 (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 1.45% for Class A, 2.20% for Class C and 1.20% for Class Y. 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 these expense caps. 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.

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

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

[1] Average annual total returns for the FTSE EPRA/NAREIT Developed Index for the life of each class were as follows: Class A-0.68%; Class C-0.68%; Class Y-16.35%.

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Class P Prospectus | PACE® Large Co Growth Equity Investments | Class P

PACE® Large Co Growth Equity Investments

Investment objective

Capital appreciation.

Fees and expenses of the fund

These tables describe the fees and expenses that you may pay if you buy and hold shares of the fund.

Shareholder fees (fees paid directly from your investment)

Shareholder Fees	Class P Prospectus PACE® Large Co Growth Equity Investments Class P
Maximum front-end sales charge (load) imposed on purchases (as a % of the offering price)	none
Maximum deferred sales charge (load) (as a % of the offering price)	none
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)	2.00%
Redemption fee (as a % of the amount redeemed within 90 days of purchase, if applicable)	1.00%

Annual fund operating expenses (expenses that you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses	Class P Prospectus PACE® Large Co Growth Equity Investments Class P
Management fees	0.68%
Distribution and/or service (12b-1) fees	none
Other expenses (includes administration fee of 0.10%)	0.27%
Total annual fund operating expenses	0.95%

Example

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:

Expense Example (USD $)	1 year	3 years	5 years	10 years
Class P Prospectus PACE® Large Co Growth Equity Investments Class P	298	913	1,552	3,271

Portfolio turnover

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 76% of the average value of its portfolio.

Principal strategies

Principal investments

The fund invests primarily in stocks of companies that are believed to have substantial potential for capital growth. 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 issued by large capitalization companies. As of the date of this prospectus, large capitalization companies means companies with a total market capitalization of $3.0 billion or greater at the time of purchase. Effective April 28, 2014, large capitalization companies means companies with a total market capitalization within the market capitalization range of the companies in the Russell 1000^® Growth Index at the time of purchase. Dividend income is an incidental consideration in the investment advisors' selection of stocks for the fund.

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 healthcare or technology. The fund may also invest, to a lesser extent, in other securities such as securities convertible into stocks, fixed income securities, initial public offerings ("IPOs") and stocks of companies with smaller total market capitalizations. The fund may invest up to 20% of its total assets in non-US securities, which may trade either within or outside the US.

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. Delaware Investments Fund Advisers ("Delaware"), Roxbury Capital Management, LLC ("Roxbury") and J.P. Morgan Investment Management Inc. ("J.P. Morgan") 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.

Delaware invests primarily in common stocks of large capitalization growth-oriented companies that Delaware believes have long-term capital appreciation potential and are expected to grow faster than the US economy. It uses a bottom-up approach, seeking companies that have large-end market potential, dominant business models and strong free cash flow generation that are attractively priced compared to the intrinsic value of the securities. Delaware tends to hold a relatively focused portfolio with a limited number of stocks.

Roxbury's strategy employs a bottom-up approach to stock selection, seeking high quality growth companies whose stocks are trading at discounts to fair value. Roxbury looks for companies with sustainable competitive advantages and opportunities to grow and reinvest capital at higher rates than their cost of capital, as well as companies with management teams with a proven ability to maximize shareholder value. Roxbury evaluates companies as private entities to determine their intrinsic worth and uses scenario analysis to determine a "margin of safety," or discount to intrinsic value, as a means of protecting capital. Roxbury typically sells a stock if (1) the market price exceeds Roxbury's estimate of intrinsic value; (2) the company's fundamentals fall short of Roxbury's investment thesis; or (3) when there are more attractive investment alternatives. Roxbury may invest in a limited number of stocks that it believes have attractive risk-reward profiles, and this may also result in significant weights in a sector.

J.P. Morgan invests primarily in a focused portfolio of equity securities of large capitalization companies. Although J.P. Morgan will invest primarily in equity securities of U.S. companies, it may invest in foreign securities, including depositary receipts. In selecting investments, J.P. Morgan utilizes a combination of qualitative analysis and quantitative metrics in order to seek to achieve target returns which are higher than those of the fund's benchmark while attempting to maintain a moderate risk profile. J.P. Morgan employs a process that combines research, valuation and stock selection to identify companies that have a history of above-average growth or which it believes will achieve above-average growth in the future, and looks for companies with leading competitive positions, predictable and durable business models and management that can achieve sustained growth. J.P. Morgan may sell a security: due to a change in the company's fundamentals or a change in the original reason for purchase of an investment; if it no longer considers the security to be reasonably valued; or if it identifies a stock that it believes offers a better investment opportunity.

Principal risks

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.

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.

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.

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.

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.

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.

Performance

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. Delaware assumed responsibility for managing a separate portion of the fund's assets on December 5, 2007. Roxbury assumed responsibility for managing a separate portion of the fund's assets on May 25, 2010. J.P. Morgan assumed day-to-day management of a separate portion of the fund's assets on October 5, 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.

PACE Large Co Growth Equity Investments Annual Total Returns of Class P Shares

Best quarter during calendar years shown—1Q 2012: 16.35%
Worst quarter during calendar years shown—4Q 2008: (21.35)%

Average annual total returns (figures reflect 2% PACE Select Advisors Program Fee) (for the periods ended December 31, 2013)

Average Annual Returns Class P Prospectus PACE® Large Co Growth Equity Investments	Average Annual Returns, 1 Year	Average Annual Returns, 5 Years	Average Annual Returns, 10 Years	Average Annual Returns, Inception Date
Class P	32.49%	16.66%	5.22%	Aug. 24, 1995
Class P After Taxes on Distributions	29.70%	16.11%	4.91%
Class P After Taxes on Distributions and Sale of Fund Shares	20.41%	13.48%	4.17%
Class P Russell 1000 Growth Index (Index reflects no deduction for fees, expenses or taxes.)	33.48%	20.39%	7.83%

XML

Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

PACE® Intermediate Fixed Income Investments

Objective [Heading]

rr_ObjectiveHeading

Investment objective

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

Current income, consistent with reasonable stability of principal.

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. You may qualify for sales charge discounts on purchases of Class A shares if you or your family invest, or agree to invest in the future, at least $100,000 in the UBS family of funds. More information about these and other discounts and waivers, as well as eligibility requirements for each share class, is available from your financial advisor and in "Managing your fund account" on page 109 of the prospectus and in "Reduced sales charges, additional purchase, exchange and redemption information and other services" on page 208 of the fund's Statement of Additional Information.

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)

Fee Waiver or Reimbursement over Assets, Date of Termination

rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination

2015-03-31

Portfolio Turnover [Heading]

rr_PortfolioTurnoverHeading

Portfolio turnover

Portfolio Turnover [Text Block]

rr_PortfolioTurnoverTextBlock

The fund pays transaction costs, such as commissions or dealer spreads, 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 818% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

818.00%

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 unless otherwise stated. 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 fixed income securities. Such investments may include US government and foreign government bonds (including bonds issued by supranational and quasi-governmental entities and mortgage-backed securities) and corporate bonds (including mortgage- and asset-backed securities of private issuers, Eurodollar certificates of deposit, Eurodollar bonds and Yankee bonds). There are different types of US government securities, including those issued or guaranteed by the US government, its agencies and its instrumentalities, and they have different types of government support. Some are supported by the full faith and credit of the US, while others are supported by (1) the ability of the issuer to borrow from the US Treasury; (2) the credit of the issuing agency, instrumentality or government-sponsored entity; (3) pools of assets, such as mortgages; or (4) the US government in some other way.

The fund may invest in bonds that are investment grade at the time of purchase. The fund may also invest, in the aggregate, up to 20% of its total assets (measured at the time of purchase) in (1) bonds that are below investment grade at the time of purchase (or unrated bonds of equivalent quality) (commonly known as "junk bonds"), (2) non-US dollar denominated securities, and (3) fixed income securities of issuers located in emerging markets. The fund may also invest in preferred stocks.

The fund invests in bonds of varying maturities, but normally maintains a dollar-weighted average maturity of approximately three to ten years. It normally limits its overall portfolio "duration" to within +/- 50% of the duration of the Barclays US Intermediate Government/Credit Index, as calculated by the investment advisor, which as of December 31, 2013 was approximately 3.21 years. Duration is a measure of the fund's exposure to interest rate risk—a longer duration means that changes in market interest rates are likely to have a larger effect on the value of the fund's portfolio.

The fund may invest in "to be announced" or "TBA" securities, which are mortgage-backed securities that usually are traded on a forward commitment basis with an approximate principal amount and no defined maturity date, issued or guaranteed by US government agencies and instrumentalities. The fund also may engage in TBA and Treasury "roll" transactions. A TBA roll transaction is a strategy whereby the investment advisor decides to sell one TBA security and buy another TBA security due at a later date (Treasury roll transactions differ in that the underlying securities are US Treasury securities).

The fund may, but is not required to, use exchange-traded or over-the-counter derivative instruments for risk management purposes or to attempt to increase total returns. The derivatives in which the fund may invest include options (on swap agreements), futures (on securities or interest rate futures) and swap agreements (specifically, interest rate swaps). These derivatives may be used for risk management purposes, such as managing the risk profile of the fund. In addition, the derivative instruments listed above may be used to enhance returns or in place of direct investments. Futures, swaps and swaptions also be used to adjust the fund's portfolio duration.

The fund's investment strategies may result in high portfolio turnover.

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. BlackRock Financial Management, Inc. ("BlackRock") currently serves as the fund's investment advisor. BlackRock decides to buy specific bonds for the fund based on its credit analysis and review. BlackRock seeks to add value by controlling portfolio duration within a narrow band relative to the Barclays US Intermediate Government/Credit Index. BlackRock uses an analytical process that involves evaluating macroeconomics trends, technical market factors, yield curve exposure and market volatility.

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:

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.

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.

Prepayment risk: The fund's mortgage- and asset-backed securities may be prepaid more rapidly than expected, especially when interest rates are falling, and the fund may have to reinvest those prepayments at lower interest rates. When interest rates are rising, slower prepayments may extend the duration of the securities and may reduce their value.

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.

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 markets 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.

Derivatives risk: The value of "derivatives"—so called because their value "derives" from the value of an underlying asset, reference rate or index—may rise or fall more rapidly than other investments. When using derivatives for non-hedging purposes, it is possible for the fund to lose more than the amount it invested in the derivative. When using derivatives for hedging purposes, the fund's overall returns may be reduced if the hedged investment experiences a favorable price movement. The risks of investing in derivative instruments also include market and management risks. Derivatives relating to fixed income markets are especially susceptible to interest rate risk and credit risk. In addition, many types of swaps and other non-exchange traded derivatives may be subject to liquidity risk, counterparty risk, credit risk and mispricing or valuation complexity. These derivatives risks are different from, and may be greater than, the risks associated with investing directly in securities and other instruments.

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.

US Government securities risk: There are different types of US government securities with different levels of credit risk, including the risk of default, depending on the nature of the particular government support for that security. For example, a US government-sponsored entity, such as Federal National Mortgage Association ("Fannie Mae") or Federal Home Loan Mortgage Corporation ("Freddie Mac"), although chartered or sponsored by an Act of Congress, may issue securities that are neither insured nor guaranteed by the US Treasury and are therefore riskier than those that are.

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.

High yield securities ("junk bonds") risk: Lower-rated securities (the issuers of which are typically in poor financial health) are subject to higher risks than investment grade securities. For example, lower-rated securities may be (1) subject to a greater risk of loss of principal and non-payment of interest (including default by the issuer); (2) subject to greater price volatility; and (3) less liquid than investment grade securities. The prices of such securities may be more vulnerable to bad economic news, or even the expectation of bad news, than higher rated fixed income securities.

Swap agreement risk: The fund may enter into various types of swap agreements. Swap agreements can be less liquid and more difficult to value than other investments. Because its cash flows are based in part on changes in the value of the reference asset, a total return swap's market value will vary with changes in that reference asset. In addition, the fund may experience delays in payment or loss of income if the counterparty fails to perform under the contract.

Management risk: The risk that the investment strategies, techniques and risk analyses employed by the investment advisor may not produce the desired results.

Leverage risk associated with financial instruments: The use of financial instruments to increase potential returns may cause the fund to be more volatile than if it had not been leveraged. The use of leverage may also accelerate the velocity of losses and can result in losses to the fund that exceed the amount originally invested.

Mortgage-related securities risk: Mortgage-related securities are subject to risks that are different from and/or more acute than risks associated with other types of debt instruments. Such risks may include prepayment risk, as discussed above. Conversely, in periods of rising interest rates, the fund may be subject to extension risk, and may receive principal later than expected, causing additional volatility. During periods of difficult or frozen credit markets, significant changes in interest rates, or deteriorating economic conditions, such securities may decline in value, face valuation difficulties, become more volatile and become illiquid. Certain types of mortgage-backed securities (e.g., CMOs and stripped mortgage-backed securities) can be even more volatile and may be more sensitive to the rate of prepayments than other mortgage-related securities. The risk of default for "sub-prime" mortgages is generally higher than other types of mortgage-backed securities. The structure of some of these securities may be complex, and there may be less available information than other types of debt securities.

Risk Lose Money [Text]

rr_RiskLoseMoney

You may lose money by investing in the fund.

Risk Nondiversified Status [Text]

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 [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 sales charges of the fund's class C shares; 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. 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. After-tax returns for other classes will vary from the Class C shares' after-tax returns shown.

Performance Information Illustrates Variability of Returns [Text]

rr_PerformanceInformationIllustratesVariabilityOfReturns

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.

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 Intermediate Fixed Income Investments Annual Total Returns of Class C Shares

Bar Chart Does Not Reflect Sales Loads [Text]

rr_BarChartDoesNotReflectSalesLoads

The bar chart does not reflect the sales charges of the fund's class C shares; if it did, the total returns shown would be lower.

Bar Chart Closing [Text Block]

rr_BarChartClosingTextBlock

Best quarter during calendar years shown—3Q 2009: 3.63%
Worst quarter during calendar years shown—3Q 2008: (3.87)%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Best quarter during calendar years shown

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Sep. 30, 2009

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

3.63%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Worst quarter during calendar years shown

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Sep. 30, 2008

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(3.87%)

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.

Performance Table One Class of after Tax Shown [Text]

rr_PerformanceTableOneClassOfAfterTaxShown

After-tax returns for other classes will vary from the Class C shares' after-tax returns shown.

Caption

rr_AverageAnnualReturnCaption

Average annual total returns (figures reflect sales charges) (for the periods ended December 31, 2013)

Barclays US Intermediate Government/Credit Index (Index reflects no deduction for fees, expenses or taxes.)

Risk/Return:

rr_RiskReturnAbstract

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

(0.86%)

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

3.96%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

4.09%

Class A

Risk/Return:

rr_RiskReturnAbstract

Maximum front-end sales charge (load) imposed on purchases (as a % of the offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

4.50%

Maximum deferred sales charge (load) (as a % of the lesser of the offering price or the redemption price)

rr_MaximumDeferredSalesChargeOverOther

none

Redemption Fee (as a percentage of Amount Redeemed)

rr_RedemptionFeeOverRedemption

(1.00%)

Exchange fee

rr_ExchangeFeeOverRedemption

none

Management fees

rr_ManagementFeesOverAssets

0.43%

Distribution and/or service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Other expenses (includes administration fee of 0.10%)

rr_OtherExpensesOverAssets

0.31%

Total annual fund operating expenses

rr_ExpensesOverAssets

0.99%

Fee Waiver or Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.06%)

^[1]

Total annual fund operating expenses after fee waiver and/or expense reimbursements

rr_NetExpensesOverAssets

0.93%

^[1]

Expense Breakpoint Discounts [Text]

rr_ExpenseBreakpointDiscounts

You may qualify for sales charge discounts on purchases of Class A shares if you or your family invest, or agree to invest in the future, at least $100,000 in the UBS family of funds.

Expense Breakpoint, Minimum Investment Required [Amount]

rr_ExpenseBreakpointMinimumInvestmentRequiredAmount

$ 100,000

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

541

^[2]

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

745

^[2]

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

967

^[2]

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,603

^[2]

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

(5.63%)

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

3.23%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

2.88%

Average Annual Returns, Inception Date

rr_AverageAnnualReturnInceptionDate

Jan. 31, 2001

Class C

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 lesser of the offering price or the redemption price)

rr_MaximumDeferredSalesChargeOverOther

0.75%

Redemption Fee (as a percentage of Amount Redeemed)

rr_RedemptionFeeOverRedemption

(1.00%)

Exchange fee

rr_ExchangeFeeOverRedemption

none

Management fees

rr_ManagementFeesOverAssets

0.43%

Distribution and/or service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

0.75%

Other expenses (includes administration fee of 0.10%)

rr_OtherExpensesOverAssets

0.31%

Total annual fund operating expenses

rr_ExpensesOverAssets

1.49%

Fee Waiver or Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.06%)

^[1]

Total annual fund operating expenses after fee waiver and/or expense reimbursements

rr_NetExpensesOverAssets

1.43%

^[1]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

221

^[2]

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

465

^[2]

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

808

^[2]

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,774

^[2]

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

146

^[2]

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

465

^[2]

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

808

^[2]

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

1,774

^[2]

Annual Return 2004

rr_AnnualReturn2004

1.95%

Annual Return 2005

rr_AnnualReturn2005

0.55%

Annual Return 2006

rr_AnnualReturn2006

3.06%

Annual Return 2007

rr_AnnualReturn2007

6.69%

Annual Return 2008

rr_AnnualReturn2008

(2.03%)

Annual Return 2009

rr_AnnualReturn2009

8.68%

Annual Return 2010

rr_AnnualReturn2010

4.65%

Annual Return 2011

rr_AnnualReturn2011

3.88%

Annual Return 2012

rr_AnnualReturn2012

3.10%

Annual Return 2013

rr_AnnualReturn2013

(1.64%)

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

(2.38%)

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

3.68%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

2.84%

Average Annual Returns, Inception Date

rr_AverageAnnualReturnInceptionDate

Dec. 01, 2000

Class C | After Taxes on Distributions

Risk/Return:

rr_RiskReturnAbstract

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

(2.57%)

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

3.06%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

1.99%

Class C | After Taxes on Distributions and Sale of Fund Shares

Risk/Return:

rr_RiskReturnAbstract

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

(1.35%)

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

2.62%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

1.88%

Class Y

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 lesser of the offering price or the redemption price)

rr_MaximumDeferredSalesChargeOverOther

none

Redemption Fee (as a percentage of Amount Redeemed)

rr_RedemptionFeeOverRedemption

(1.00%)

Exchange fee

rr_ExchangeFeeOverRedemption

none

Management fees

rr_ManagementFeesOverAssets

0.43%

Distribution and/or service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

none

Other expenses (includes administration fee of 0.10%)

rr_OtherExpensesOverAssets

0.46%

Total annual fund operating expenses

rr_ExpensesOverAssets

0.89%

Fee Waiver or Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.21%)

^[1]

Total annual fund operating expenses after fee waiver and/or expense reimbursements

rr_NetExpensesOverAssets

0.68%

^[1]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

69

^[2]

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

263

^[2]

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

472

^[2]

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 1,077

^[2]

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

(0.82%)

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

4.47%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

3.63%

Average Annual Returns, Inception Date

rr_AverageAnnualReturnInceptionDate

Feb. 02, 2001

[1] 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 of each class through March 31, 2015 (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 0.93% for Class A, 1.43% for Class C and 0.68% for Class Y. 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 these expense caps. 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.

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

XML

Label	Element	Value
Risk/Return:	rr_RiskReturnAbstract
Prospectus Date	rr_ProspectusDate	Mar. 31, 2014

XML

Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

PACE® Large Co Value Equity Investments

Objective [Heading]

rr_ObjectiveHeading

Investment objective

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

Capital appreciation and dividend income.

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)

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 lesser of the offering price or the redemption price)

rr_MaximumDeferredSalesChargeOverOther

none

Redemption Fee (as a percentage of Amount Redeemed)

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%

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)

Management fees

rr_ManagementFeesOverAssets

0.65%

Distribution and/or service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

none

Miscellaneous expenses (includes administration fee of 0.10%)

rr_Component1OtherExpensesOverAssets

0.26%

Dividend expense, borrowing costs and related interest expense attributable to securities sold short

rr_Component2OtherExpensesOverAssets

0.11%

^[1]

Other expenses (includes administration fee of 0.10%)

rr_OtherExpensesOverAssets

0.37%

Total annual fund operating expenses

rr_ExpensesOverAssets

1.02%

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 71% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

71.00%

Other Expenses, New Fund, Based on Estimates [Text]

rr_OtherExpensesNewFundBasedOnEstimates

These "Dividend expense, borrowing costs and related interest expense attributable to securities sold short" are based on estimates and may vary based on actual investments.

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:

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 305

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

933

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

1,587

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 3,337

Strategy [Heading]

rr_StrategyHeading

Principal strategies

Strategy Narrative [Text Block]

rr_StrategyNarrativeTextBlock

Principal investments

The fund invests primarily in stocks of US companies that are believed to be undervalued. 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 issued by large capitalization companies. As of the date of this prospectus, large capitalization companies means companies with a total market capitalization of $3.0 billion or greater at the time of purchase. Effective April 28, 2014, large capitalization companies means companies with a total market capitalization within the market capitalization range of the companies in the Russell 1000^® Value Index at the time of purchase. The fund seeks income primarily from dividend paying stocks.

The fund may invest, to a lesser extent, in other securities, such as securities convertible into stocks, initial public offerings ("IPOs") and stocks of companies with smaller total market capitalizations. The fund may invest up to 20% of its total assets in non-US securities, which may trade either within or outside the US.

The fund is also permitted to engage in "short-selling." When selling short, 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 the security to the lender. The fund may also invest the proceeds received upon the initial sale of the security, resulting in leverage and increasing the fund's return and loss potential. Short selling provides opportunities to increase the fund's total returns, but also entails significant potential risks.

Management process

The fund employs a "manager of managers" structure. The fund's manager, UBS Global Asset Management (Americas) Inc. ("UBS Global AM"), 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. Institutional Capital LLC ("ICAP"), Pzena Investment Management, LLC ("Pzena"), Robeco Investment Management, Inc. ("Robeco") and Los Angeles Capital Management and Equity Research, Inc. ("Los Angeles Capital") 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.

ICAP's investment process involves the use of its proprietary valuation model to identify large capitalization companies that it believes offer the best relative values, and ICAP seeks to avoid companies that are exhibiting excessive deterioration in earnings trends. ICAP focuses on what it believes are the key investment variables (catalysts) that could potentially impact the security's market value. These catalysts are primarily company specific, such as a new product, restructuring or change in management, but occasionally the catalyst can be thematic (e.g., dependent on macroeconomic or industry trends). After a review of stock recommendations, ICAP's portfolio management team determines whether to add the stock to the portfolio or to monitor it for future purchase. ICAP continuously monitors each security and evaluates whether to eliminate it when its price target is achieved, the catalyst becomes inoperative or another stock offers a greater opportunity.

Pzena's strategy follows a disciplined investment process to implement its value philosophy, by focusing exclusively on companies that are underperforming their historically demonstrated earnings power. Pzena applies intensive fundamental research to these companies in an effort to determine whether such underperformance is temporary or permanent. Pzena looks for companies where: (1) the current valuation is low compared to the company's normalized earnings power; (2) current earnings are below historic norms; (3) the problems are temporary; (4) management has a viable strategy to generate earnings recovery; and (5) there is meaningful downside protection in case the earnings recovery does not materialize.

Robeco invests primarily in a diversified portfolio of common stocks of issuers identified as having attractive value characteristics with strong fundamentals. In selecting stocks, Robeco begins with a quantitative analysis that ranks the investment universe based on valuation, momentum and other fundamental factors. Then, Robeco applies fundamental analysis to those securities, considering factors such as price-to-book value and price-to-earnings ratios; high return on invested capital; and positive business momentum, as evidenced by improving trends, rising earnings and/or a catalyst for an improved business outlook. This process results in recommendations and price targets for the selected securities. Robeco constructs the portfolio based on these recommendations and applies certain risk controls, such as diversification among industries and sectors. Robeco establishes a sell discipline for each security in the portfolio based on its target price, and may also sell a security if business fundamentals weaken or if an expected catalyst fails to materialize. Robeco seeks to outperform the fund's benchmark in falling markets and to keep pace with the benchmark in rising markets, while protecting capital.

Los Angeles Capital employs a "long/short" or "130/30" equity strategy. Los Angeles Capital buys securities "long" that it believes will outperform the market or decrease portfolio risk, and sells securities "short" that it believes will underperform the market. When Los Angeles Capital sells a security short, it may invest the proceeds from that sale in additional securities. (For example, if Los Angeles Capital were responsible for $100 of fund assets, it may take traditional long positions in equity securities with the full $100, borrow and sell short $30 of equity securities, and also invest long the $30 received upon the initial short sale, resulting in long/short equity exposure, as percentages of its assets, of "130/30".) Los Angeles Capital uses a proprietary quantitative model that includes fundamental data inputs for a universe of equity securities and, through the use of statistical tools, estimates expected returns based on each security's risk characteristics and the expected return to each characteristic in the current market environment. Security weights, both long and short, are assigned through an integrated optimization process which identifies the portfolio with the highest expected return for an acceptable level of risk. Los Angeles Capital seeks to generate incremental investment returns above the fund's benchmark, while attempting to control investment risk relative to the benchmark. While Los Angeles Capital does not set price targets or valuation constraints, it will sell or short sell a security if it no longer has the desired risk characteristics, or if there are concerns about a particular company's merits. Los Angeles Capital closely monitors its short positions and borrowing costs.

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.

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.

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.

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.

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.

Leverage risk associated with financial instruments and practices: The use of certain financial instruments, including derivatives used for investment (non-hedging) purposes, and the engagement in certain practices, such as the investment of proceeds received in connection with short sales, to increase potential returns may cause the fund to be more volatile than if it had not been leveraged. The use of leverage may also accelerate the velocity of losses and can result in losses to the fund that exceed the amount originally invested.

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. The risks associated with short sales increase when the fund invests the proceeds received upon the initial sale of the security, because the fund can suffer losses on both the short position and the long position established with the short sale proceeds. 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.

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. ICAP assumed day-to-day management of a portion of the fund's assets on July 1, 2000. Pzena assumed day-to-day management of another portion of the fund's assets on May 27, 2008. Robeco assumed day-to-day management of a separate portion of the fund's assets on May 29, 2013. Los Angeles Capital assumed day-to-day management of a separate portion of the fund's assets on September 11, 2013. 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 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.

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 Large Co Value 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.

Annual Return 2004

rr_AnnualReturn2004

13.13%

Annual Return 2005

rr_AnnualReturn2005

10.66%

Annual Return 2006

rr_AnnualReturn2006

18.95%

Annual Return 2007

rr_AnnualReturn2007

4.63%

Annual Return 2008

rr_AnnualReturn2008

(39.85%)

Annual Return 2009

rr_AnnualReturn2009

27.21%

Annual Return 2010

rr_AnnualReturn2010

15.39%

Annual Return 2011

rr_AnnualReturn2011

(2.26%)

Annual Return 2012

rr_AnnualReturn2012

15.73%

Annual Return 2013

rr_AnnualReturn2013

35.17%

Bar Chart Closing [Text Block]

rr_BarChartClosingTextBlock

Best quarter during calendar years shown—2Q 2009: 18.50%
Worst quarter during calendar years shown—4Q 2008: (22.58)%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Best quarter during calendar years shown

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Jun. 30, 2009

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

18.50%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Worst quarter during calendar years shown

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Dec. 31, 2008

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(22.58%)

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 (figures reflect 2% PACE Select Advisors Program Fee) (for the periods ended December 31, 2013)

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

32.49%

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

15.22%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

5.58%

Average Annual Returns, Inception Date

rr_AverageAnnualReturnInceptionDate

Aug. 24, 1995

After Taxes on Distributions

Risk/Return:

rr_RiskReturnAbstract

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

31.78%

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

14.91%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

4.83%

After Taxes on Distributions and Sale of Fund Shares

Risk/Return:

rr_RiskReturnAbstract

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

18.95%

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

12.31%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

4.53%

Russell 1000 Value Index (Index reflects no deduction for fees, expenses or taxes.)

Risk/Return:

rr_RiskReturnAbstract

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

32.53%

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

16.67%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

7.59%

[1] These "Dividend expense, borrowing costs and related interest expense attributable to securities sold short" are based on estimates and may vary based on actual investments.

XML

Document and Entity Information	0 Months Ended
	Nov. 30, 2013
Risk/Return:
Document Type	485BPOS
Document Period End Date	Nov. 30, 2013
Registrant Name	PACE SELECT ADVISORS TRUST
Central Index Key	0000930007
Amendment Flag	false
Document Creation Date	Mar. 28, 2014
Document Effective Date	Mar. 31, 2014
Prospectus Date	Mar. 31, 2014
A, C, Y Prospectus | PACE® Mortgage-Backed Securities Fixed Income Investments | Class A
Risk/Return:
Trading Symbol	PFXAX
A, C, Y Prospectus | PACE® Mortgage-Backed Securities Fixed Income Investments | Class C
Risk/Return:
Trading Symbol	PFXCX
A, C, Y Prospectus | PACE® Mortgage-Backed Securities Fixed Income Investments | Class Y
Risk/Return:
Trading Symbol	PFXYX
A, C, Y Prospectus | PACE® Intermediate Fixed Income Investments | Class A
Risk/Return:
Trading Symbol	PIFAX
A, C, Y Prospectus | PACE® Intermediate Fixed Income Investments | Class C
Risk/Return:
Trading Symbol	PIICX
A, C, Y Prospectus | PACE® Intermediate Fixed Income Investments | Class Y
Risk/Return:
Trading Symbol	PIFYX
A, C, Y Prospectus | PACE® Strategic Fixed Income Investments | Class A
Risk/Return:
Trading Symbol	PBNAX
A, C, Y Prospectus | PACE® Strategic Fixed Income Investments | Class C
Risk/Return:
Trading Symbol	PBNCX
A, C, Y Prospectus | PACE® Strategic Fixed Income Investments | Class Y
Risk/Return:
Trading Symbol	PSFYX
A, C, Y Prospectus | PACE® Municipal Fixed Income Investments | Class A
Risk/Return:
Trading Symbol	PMUAX
A, C, Y Prospectus | PACE® Municipal Fixed Income Investments | Class C
Risk/Return:
Trading Symbol	PMUCX
A, C, Y Prospectus | PACE® Municipal Fixed Income Investments | Class Y
Risk/Return:
Trading Symbol	PMUYX
A, C, Y Prospectus | PACE® International Fixed Income Investments | CLASS A
Risk/Return:
Trading Symbol	PWFAX
A, C, Y Prospectus | PACE® International Fixed Income Investments | CLASS C
Risk/Return:
Trading Symbol	PWFCX
A, C, Y Prospectus | PACE® International Fixed Income Investments | CLASS Y
Risk/Return:
Trading Symbol	PWFYX
A, C, Y Prospectus | PACE® High Yield Investments | Class A
Risk/Return:
Trading Symbol	PHIAX
A, C, Y Prospectus | PACE® High Yield Investments | Class C
Risk/Return:
Trading Symbol	PHYCX
A, C, Y Prospectus | PACE® High Yield Investments | Class Y
Risk/Return:
Trading Symbol	PHDYX
A, C, Y Prospectus | PACE® Large Co Value Equity Investments | CLASS A
Risk/Return:
Trading Symbol	PCPAX
A, C, Y Prospectus | PACE® Large Co Value Equity Investments | CLASS C
Risk/Return:
Trading Symbol	PLVCX
A, C, Y Prospectus | PACE® Large Co Value Equity Investments | CLASS Y
Risk/Return:
Trading Symbol	PLVYX
A, C, Y Prospectus | PACE® Large Co Growth Equity Investments | CLASS A
Risk/Return:
Trading Symbol	PLAAX
A, C, Y Prospectus | PACE® Large Co Growth Equity Investments | CLASS C
Risk/Return:
Trading Symbol	PLACX
A, C, Y Prospectus | PACE® Large Co Growth Equity Investments | CLASS Y
Risk/Return:
Trading Symbol	PLAYX
A, C, Y Prospectus | PACE® Small/Medium Co Value Equity Investments | CLASS A
Risk/Return:
Trading Symbol	PEVAX
A, C, Y Prospectus | PACE® Small/Medium Co Value Equity Investments | CLASS C
Risk/Return:
Trading Symbol	PEVCX
A, C, Y Prospectus | PACE® Small/Medium Co Value Equity Investments | CLASS Y
Risk/Return:
Trading Symbol	PVEYX
A, C, Y Prospectus | PACE® Small/Medium Co Growth Equity Investments | CLASS A
Risk/Return:
Trading Symbol	PQUAX
A, C, Y Prospectus | PACE® Small/Medium Co Growth Equity Investments | CLASS C
Risk/Return:
Trading Symbol	PUMCX
A, C, Y Prospectus | PACE® Small/Medium Co Growth Equity Investments | CLASS Y
Risk/Return:
Trading Symbol	PUMYX
A, C, Y Prospectus | PACE® International Equity Investments | CLASS A
Risk/Return:
Trading Symbol	PWGAX
A, C, Y Prospectus | PACE® International Equity Investments | CLASS C
Risk/Return:
Trading Symbol	PWGCX
A, C, Y Prospectus | PACE® International Equity Investments | CLASS Y
Risk/Return:
Trading Symbol	PWIYX
A, C, Y Prospectus | PACE® International Emerging Markets Equity Investments | CLASS A
Risk/Return:
Trading Symbol	PWEAX
A, C, Y Prospectus | PACE® International Emerging Markets Equity Investments | CLASS C
Risk/Return:
Trading Symbol	PWECX
A, C, Y Prospectus | PACE® International Emerging Markets Equity Investments | CLASS Y
Risk/Return:
Trading Symbol	PWEYX
A, C, Y Prospectus | PACE® Global Real Estate Securities Investments | Class A
Risk/Return:
Trading Symbol	PREAX
A, C, Y Prospectus | PACE® Global Real Estate Securities Investments | Class C
Risk/Return:
Trading Symbol	PREEX
A, C, Y Prospectus | PACE® Global Real Estate Securities Investments | Class Y
Risk/Return:
Trading Symbol	PREYX
A, C, Y Prospectus | PACE® Alternative Strategies Investments | Class A
Risk/Return:
Trading Symbol	PASIX
A, C, Y Prospectus | PACE® Alternative Strategies Investments | Class C
Risk/Return:
Trading Symbol	PASOX
A, C, Y Prospectus | PACE® Alternative Strategies Investments | Class Y
Risk/Return:
Trading Symbol	PASYX
Class P Prospectus | PACE® Mortgage-Backed Securities Fixed Income Investments | Class P
Risk/Return:
Trading Symbol	PCGTX
Class P Prospectus | PACE® Intermediate Fixed Income Investments | Class P
Risk/Return:
Trading Symbol	PCIFX
Class P Prospectus | PACE® Strategic Fixed Income Investments | Class P
Risk/Return:
Trading Symbol	PCSIX
Class P Prospectus | PACE® Municipal Fixed Income Investments | Class P
Risk/Return:
Trading Symbol	PCMNX
Class P Prospectus | PACE® International Fixed Income Investments | Class P
Risk/Return:
Trading Symbol	PCGLX
Class P Prospectus | PACE® High Yield Investments | Class P
Risk/Return:
Trading Symbol	PHYPX
Class P Prospectus | PACE® Large Co Value Equity Investments | Class P
Risk/Return:
Trading Symbol	PCLVX
Class P Prospectus | PACE® Large Co Growth Equity Investments | Class P
Risk/Return:
Trading Symbol	PCLCX
Class P Prospectus | PACE® Small/Medium Co Value Equity Investments | Class P
Risk/Return:
Trading Symbol	PCSVX
Class P Prospectus | PACE® Small/Medium Co Growth Equity Investments | Class P
Risk/Return:
Trading Symbol	PCSGX
Class P Prospectus | PACE® International Equity Investments | Class P
Risk/Return:
Trading Symbol	PCIEX
Class P Prospectus | PACE® International Emerging Markets Equity Investments | Class P
Risk/Return:
Trading Symbol	PCEMX
Class P Prospectus | PACE® Global Real Estate Securities Investments | Class P
Risk/Return:
Trading Symbol	PREQX
Class P Prospectus | PACE® Alternative Strategies Investments | Class P
Risk/Return:
Trading Symbol	PASPX
Class P Prospectus | PACE® Money Market Investments | Class P
Risk/Return:
Trading Symbol	PCEXX

XML

A, C, Y Prospectus | PACE® Strategic Fixed Income Investments

PACE® Strategic Fixed Income Investments

Investment objective

Total return consisting of income and capital appreciation.

Fees and expenses of the fund

These tables describe the fees and expenses that you may pay if you buy and hold shares of the fund. You may qualify for sales charge discounts on purchases of Class A shares if you or your family invest, or agree to invest in the future, at least $100,000 in the UBS family of funds. More information about these and other discounts and waivers, as well as eligibility requirements for each share class, is available from your financial advisor and in "Managing your fund account" on page 109 of the prospectus and in "Reduced sales charges, additional purchase, exchange and redemption information and other services" on page 208 of the fund's Statement of Additional Information.

Shareholder fees (fees paid directly from your investment)

Shareholder Fees A, C, Y Prospectus PACE® Strategic Fixed Income Investments	Class A	Class C	Class Y
Maximum front-end sales charge (load) imposed on purchases (as a % of the offering price)	4.50%	none	none
Maximum deferred sales charge (load) (as a % of the lesser of the offering price or the redemption price)	none	0.75%	none
Exchange fee	none	none	none
Redemption fee (as a % of the amount redeemed within 90 days of purchase, if applicable)	1.00%	1.00%	1.00%

Annual fund operating expenses (expenses that you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses A, C, Y Prospectus PACE® Strategic Fixed Income Investments		Class A		Class C	Class Y
Management fees		0.50%		0.50%	0.50%
Distribution and/or service (12b-1) fees		0.25%		0.75%	none
Other expenses (includes administration fee of 0.10%)		0.28%		0.26%	0.40%
Total annual fund operating expenses		1.03%		1.51%	0.90%
Management fee waiver/expense reimbursements	[1]				0.09%
Total annual fund operating expenses after fee waiver and/or expense reimbursements	[1]	1.03%	[2]	1.51%	0.81%

Example

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 unless otherwise stated. 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:

Expense Example A, C, Y Prospectus PACE® Strategic Fixed Income Investments (USD $)		1 year	3 years	5 years	10 years
Class A	[1]	550	763	993	1,653
Class C	[1]	229	477	824	1,802
Class Y	[1]	83	278	490	1,100

Expense Example No Redemption (USD $)		1 year	3 years	5 years	10 years
A, C, Y Prospectus PACE® Strategic Fixed Income Investments Class C	[1]	154	477	824	1,802

Portfolio turnover

The fund pays transaction costs, such as commissions or dealer spreads, 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 186% of the average value of its portfolio.

Principal strategies

Principal investments

The fund invests in bonds of varying maturities, but normally limits its portfolio "duration" to within +/- 50% of the effective duration of the fund's benchmark index, Barclays US Government/Credit Index, as calculated by the investment advisor, which as of December 31, 2013 was approximately 5.12 years. Duration is a measure of the fund's exposure to interest rate risk—a longer duration means that changes in market interest rates are likely to have a larger effect on the value of the fund's portfolio.

Under normal circumstances, the fund invests at least 80% of its net assets (plus the amount of any borrowing for investment purposes) in investment grade fixed income securities. Such investments may include US government bonds, bonds that are backed by mortgages and other assets, bonds (including convertible bonds) of US and foreign private issuers, foreign government bonds (including bonds issued by supranational and quasi-governmental entities), foreign currency exchange-related securities, loan participations and assignments, repurchase agreements, municipals, structured notes, and money market instruments (including commercial paper and certificates of deposit). There are different types of US government securities, including those issued or guaranteed by the US government, its agencies and its instrumentalities, and they have different types of government support. Some are supported by the full faith and credit of the US, while others are supported by (1) the ability of the issuer to borrow from the US Treasury; (2) the credit of the issu- ing agency, instrumentality or government-sponsored entity; (3) pools of assets, such as mortgages; or (4) the US government in some other way.

The fund also invests, to a limited extent, in bonds that are below investment grade. Securities rated below investment grade (or unrated bonds of equivalent quality) are commonly known as "junk bonds." The fund may invest in when-issued or delayed delivery bonds to increase its return, giving rise to a form of leverage. The fund may invest in preferred securities.

The fund may invest in "to be announced" or "TBA" securities, which are mortgage-backed securities that usually are traded on a forward commitment basis with an approximate principal amount and no defined maturity date, issued or guaranteed by US government agencies and instrumentalities. The fund also may engage in TBA and Treasury "roll" transactions. A TBA roll transaction is a strategy whereby the investment advisor decides to sell one TBA security and buy another TBA security due at a later date (Treasury roll transactions differ in that the underlying securities are US Treasury securities).

The fund may, but is not required to, use exchange-traded or over-the-counter derivative instruments for risk management purposes or to attempt to increase total returns. The derivatives in which the fund may invest include options (on securities and swap agreements), futures (on securities or interest rate futures), currency forward agreements, swap agreements (specifically, interest rate and credit default swaps) and structured notes. These derivatives may be used for risk management purposes, such as hedging the fund's security, index, currency, interest rate or other exposure, or otherwise managing the risk profile of the fund. In addition, the derivative instruments listed above may be used in place of direct investments; to obtain or adjust exposure to certain markets; or to establish net short positions in markets, currencies or securities. Options, interest rate futures and swaps may also be used to adjust the fund's portfolio duration.

The fund's investment strategies may result in high portfolio turnover.

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. Pacific Investment Management Company LLC ("PIMCO") currently serves as the fund's investment advisor. PIMCO seeks to invest the fund's assets in those areas of the bond market that it considers undervalued, based on such factors as quality, sector, coupon and maturity. PIMCO establishes duration targets for the fund's portfolio based on its expectations for changes in interest rates and then positions the fund to take advantage of yield curve shifts. PIMCO decides to buy or sell specific bonds based on an analysis of their values relative to other similar bonds. PIMCO monitors the prepayment experience of the fund's mortgage-backed bonds and will also buy and sell securities to adjust the fund's average portfolio duration, credit quality, yield curve, sector and prepayment exposure, as appropriate.

Principal risks

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:

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.

Prepayment risk: The fund's mortgage- and asset-backed securities may be prepaid more rapidly than expected, especially when interest rates are falling, and the fund may have to reinvest those prepayments at lower interest rates. When interest rates are rising, slower prepayments may extend the duration of the securities and may reduce their value.

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.

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.

Leverage risk associated with financial instruments: The use of financial instruments to increase potential returns, including derivatives used for investment (non-hedging) purposes, may cause the fund to be more volatile than if it had not been leveraged. The use of leverage may also accelerate the velocity of losses and can result in losses to the fund that exceed the amount originally invested.

Derivatives risk: The value of "derivatives"—so called because their value "derives" from the value of an underlying asset, reference rate or index—may rise or fall more rapidly than other investments. When using derivatives for non-hedging purposes, it is possible for the fund to lose more than the amount it invested in the derivative. When using derivatives for hedging purposes, the fund's overall returns may be reduced if the hedged investment experiences a favorable price movement. The risks of investing in derivative instruments also include market and management risks. Derivatives relating to fixed income markets are especially susceptible to interest rate risk and credit risk. In addition, many types of swaps and other non-exchange traded derivatives may be subject to liquidity risk, counterparty risk, credit risk and mispricing or valuation complexity. These derivatives risks are different from, and may be greater than, the risks associated with investing directly in securities and other instruments.

High yield securities ("junk bonds") risk: Lower-rated securities (the issuers of which are typically in poor financial health) are subject to higher risks than investment grade securities. For example, lower-rated securities may be (1) subject to a greater risk of loss of principal and non-payment of interest (including default by the issuer); (2) subject to greater price volatility; and (3) less liquid than investment grade securities. The prices of such securities may be more vulnerable to bad economic news, or even the expectation of bad news, than higher rated fixed income securities.

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.

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.

US Government securities risk: There are different types of US government securities with different levels of credit risk, including the risk of default, depending on the nature of the particular government support for that security. For example, a US government-sponsored entity, such as Federal National Mortgage Association ("Fannie Mae") or Federal Home Loan Mortgage Corporation ("Freddie Mac"), although chartered or sponsored by an Act of Congress, may issue securities that are neither insured nor guaranteed by the US Treasury and are therefore riskier than those that are.

Swap agreement risk: The fund may enter into various types of swap agreements. Swap agreements can be less liquid and more difficult to value than other investments. Because its cash flows are based in part on changes in the value of the reference asset, a total return swap's market value will vary with changes in that reference asset. In addition, the fund may experience delays in payment or loss of income if the counterparty fails to perform under the contract.

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.

Management risk: The risk that the investment strategies, techniques and risk analyses employed by the investment advisor may not produce the desired results.

Mortgage-related securities risk: Mortgage-related securities are subject to risks that are different from and/or more acute than risks associated with other types of debt instruments. Such risks may include prepayment risk, as discussed above. Conversely, in periods of rising interest rates, the fund may be subject to extension risk, and may receive principal later than expected, causing additional volatility. During periods of difficult or frozen credit markets, significant changes in interest rates, or deteriorating economic conditions, such securities may decline in value, face valuation diffi- culties, become more volatile and become illiquid. Certain types of mortgage-backed securities (e.g., CMOs and stripped mortgage-backed securities) can be even more volatile and may be more sensitive to the rate of prepayments than other mortgage-related securities. The risk of default for "sub-prime" mortgages is generally higher than other types of mortgage-backed securities. The structure of some of these securities may be complex, and there may be less available information than other types of debt securities.

Performance

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 sales charges of the fund's Class C shares; 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. 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. After-tax returns for other classes will vary from the Class C shares' after-tax returns shown.

PACE Strategic Fixed Income Investments Annual Total Returns of Class C Shares

Best quarter during calendar years shown—3Q 2009: 8.68%
Worst quarter during calendar years shown—2Q 2013: (4.37)%

Average annual total returns (figures reflect sales charges) (for the periods ended December 31, 2013)

Average Annual Returns A, C, Y Prospectus PACE® Strategic Fixed Income Investments	Average Annual Returns, 1 Year	Average Annual Returns, 5 Years	Average Annual Returns, 10 Years	Average Annual Returns, Inception Date
Class A	(8.72%)	6.65%	5.25%	Dec. 11, 2000
Class C	(5.53%)	7.11%	5.23%	Dec. 01, 2000
Class Y	(4.10%)	7.91%	6.06%	Feb. 02, 2001
After Taxes on Distributions Class C	(6.99%)	5.35%	3.43%
After Taxes on Distributions and Sale of Fund Shares Class C	(2.65%)	5.00%	3.47%
Barclays US Government/ Credit Index (Index reflects no deduction for fees, expenses or taxes.)	(2.35%)	4.40%	4.52%

[1] 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 of each class through March 31, 2015 (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 1.06% for Class A, 1.56% for Class C and 0.81% for Class Y. 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 these expense caps. 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.

[2] The "Total annual fund operating expenses after fee waiver and/or expense reimbursements" for the fund's Class A shares have been restated to reflect that there will be no further recoupments of waivers/expense reimbursements by UBS Global AM for this share class for the current fiscal year. UBS Global AM recouped all amounts to which it was entitled for this share class in the prior fiscal year.

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

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

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Class P Prospectus | PACE® Small/Medium Co Growth Equity Investments | Class P

PACE® Small/Medium Co Growth Equity Investments

Investment objective

Capital appreciation.

Fees and expenses of the fund

These tables describe the fees and expenses that you may pay if you buy and hold shares of the fund.

Shareholder fees (fees paid directly from your investment)

Shareholder Fees	Class P Prospectus PACE® Small/Medium Co Growth Equity Investments Class P
Maximum front-end sales charge (load) imposed on purchases (as a % of the offering price)	none
Maximum deferred sales charge (load) (as a % of the offering price)	none
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)	2.00%
Redemption fee (as a % of the amount redeemed within 90 days of purchase, if applicable)	1.00%

Annual fund operating expenses (expenses that you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses		Class P Prospectus PACE® Small/Medium Co Growth Equity Investments Class P
Management fees		0.70%
Distribution and/or service (12b-1) fees		none
Other expenses (includes administration fee of 0.10%)		0.44%
Total annual fund operating expenses		1.14%
Management fee waiver/expense reimbursements	[1]	0.01%
Total annual fund operating expenses after fee waiver and/or expense reimbursements	[1]	1.13%

Example

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:

Expense Example (USD $)		1 year	3 years	5 years	10 years
Class P Prospectus PACE® Small/Medium Co Growth Equity Investments Class P	[1]	316	968	1,644	3,447

Portfolio turnover

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 60% of the average value of its portfolio.

Principal strategies

Principal investments

The fund invests primarily in stocks of "emerging growth" companies that are believed to have potential for high future earnings growth relative to the overall market. 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 issued by small/medium capitalization companies. As of the date of this prospectus, small/medium capitalization companies means companies with a total market capitalization of less than $6.0 billion at the time of purchase. Effective April 28, 2014, small/medium capitalization companies means companies with a total market capitalization within the market capitalization range of the companies in the Russell 2500^® Growth Index at the time of purchase. Dividend income is an incidental consideration in the investment advisors' selection of stocks for the fund.

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 healthcare or technology. The fund may invest, to a limited extent, in stocks of companies with larger total market capitalizations and other securities, including securities convertible into stocks. The fund may invest up to 10% of its total assets in non-US securities, which may trade either within or outside the US.

The fund's investment strategies may result in high portfolio turnover.

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. Copper Rock Capital Partners, LLC ("Copper Rock"), Palisade Capital Management, L.L.C. ("Palisade"), Riverbridge Partners, LLC ("Riverbridge"), Lee Munder Capital Group, LLC ("LMCG") and Timpani Capital Management LLC ("Timpani") 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.

Copper Rock employs a fundamental, bottom-up investment approach that focuses on identifying emerging companies that exhibit the potential for strong and sustainable revenue growth over each of the following two years. Copper Rock believes that incremental margin expansion and proven management are key factors that propel a company's growth. Copper Rock will typically hold 70 to 90 equity positions that are diversified across sectors and industries. Copper Rock utilizes a "pure" growth investment style that emphasizes growth and momentum characteristics, and attempts to manage risk by diversifying and understanding its holdings and employing a stringent sell discipline.

Palisade seeks fundamentally strong and dynamic small and mid cap companies that are trading at a discount to their growth rates. Palisade's goal is to ascertain a dynamic of change before it manifests in consensus es- timates. Palisade believes that the small and mid cap market is inherently less efficient than the large cap market, and attempts to gain an informational advantage by committing to the labor intensive process of conducting bottom-up fundamental research on small and mid cap companies, as well as their customers, competitors and supply chains. Palisade places heavy emphasis on the effectiveness of a small/mid cap company's management team and seeks direct access to a variety of each company's key decision-makers.

Riverbridge believes that earnings power determines the value of a franchise. Riverbridge focuses on companies that are viewed as building their earnings power and building the intrinsic value of the company over long periods of time. Riverbridge looks to invest in high-quality growth companies that demonstrate the ability to sustain strong secular earnings growth, regardless of overall economic conditions.

LMCG seeks to achieve competitive returns in small/medium capitalization companies by identifying unrecognized growth potential, wherever it exists across all industry sectors. LMCG seeks to identify firms with high quality business models, distinct competitive advantages, proven management teams, and significant growth potential. Revenue growth, margin expansion, and the ability to positively surprise and revise earnings estimates are key characteristics in LMCG's holdings. LMCG seeks to identify firms that have duration and sustainability of these characteristics based on their competitive positions in their respective industries.

Timpani seeks to invest in small cap companies where growth is robust, sustainable and underestimated by the market. Timpani uses fundamental research, focusing on companies that it believes have superior management and whose business models have a high potential for earnings upside. Timpani forms an investment decision based on this research and an assessment of the market's perception of these companies. Timpani may invest in any sector, may emphasize one or more particular sectors and may sell a company's stock when it believes a company's prospects for growth have diminished. Timpani may also sell or reduce a portfolio position when it sees market sentiment turn negative on a stock held in the portfolio.

Principal risks

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.

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.

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.

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.

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.

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.

Management risk: The risk that the investment strategies, techniques and risk analyses employed by an investment advisor may not produce the desired results.

Performance

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. Riverbridge assumed day-to-day management of a portion of the fund's assets on October 1, 2005. Copper Rock assumed responsibility for managing a separate portion of the fund's assets on March 1, 2007. Palisade assumed day-to-day management of a separate portion of the fund's assets on February 2, 2009. LMCG and Timpani assumed day-to-day management of a separate portion of the fund's assets on November 25, 2013. 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.

PACE Small/Medium Co Growth Equity Investments Annual Total Returns of Class P Shares

Best quarter during calendar years shown—2Q 2009: 20.64%
Worst quarter during calendar years shown—4Q 2008: (26.31)%

Average annual total returns (figures reflect 2% PACE Select Advisors Program Fee) (for the periods ended December 31, 2013)

Average Annual Returns Class P Prospectus PACE® Small/Medium Co Growth Equity Investments	Average Annual Returns, 1 Year	Average Annual Returns, 5 Years	Average Annual Returns, 10 Years	Average Annual Returns, Inception Date
Class P	36.13%	21.01%	6.69%	Aug. 24, 1995
Class P After Taxes on Distributions	31.84%	20.16%	5.68%
Class P After Taxes on Distributions and Sale of Fund Shares	23.04%	17.12%	5.28%
Class P Russell 2500 Growth Index (Index reflects no deduction for fees, expenses or taxes.)	40.65%	24.03%	10.11%

[1] 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 March 31, 2015 (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 1.13%. 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.

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

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A, C, Y Prospectus | PACE® International Emerging Markets Equity Investments

PACE® International Emerging Markets Equity Investments

Investment objective

Capital appreciation.

Fees and expenses of the fund

These tables describe the fees and expenses that you may pay if you buy and hold shares of the fund. You may qualify for sales charge discounts on purchases of Class A shares if you or your family invest, or agree to invest in the future, at least $50,000 in the UBS family of funds. More information about these and other discounts and waivers, as well as eligibility requirements for each share class, is available from your financial advisor and in "Managing your fund account" on page 109 of the prospectus and in "Reduced sales charges, additional purchase, exchange and redemption information and other services" on page 208 of the fund's Statement of Additional Information.

Shareholder fees (fees paid directly from your investment)

Shareholder Fees A, C, Y Prospectus PACE® International Emerging Markets Equity Investments	CLASS A	CLASS C	CLASS Y
Maximum front-end sales charge (load) imposed on purchases (as a % of the offering price)	5.50%	none	none
Maximum deferred sales charge (load) (as a % of the lesser of the offering price or the redemption price)	none	1.00%	none
Exchange fee	none	none	none
Redemption fee (as a % of the amount redeemed within 90 days of purchase, if applicable)	1.00%	1.00%	1.00%

Annual fund operating expenses (expenses that you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses A, C, Y Prospectus PACE® International Emerging Markets Equity Investments		CLASS A	CLASS C	CLASS Y
Management fees		1.00%	1.00%	1.00%
Distribution and/or service (12b-1) fees		0.25%	1.00%	none
Other expenses (includes administration fee of 0.10%)		0.57%	0.57%	0.58%
Acquired fund fees and expenses	[1]	0.07%	0.07%	0.07%
Total annual fund operating expenses		1.89%	2.64%	1.65%

Example

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 unless otherwise stated. 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:

Expense Example A, C, Y Prospectus PACE® International Emerging Markets Equity Investments (USD $)	1 year	3 years	5 years	10 years
CLASS A	731	1,111	1,515	2,640
CLASS C	367	820	1,400	2,973
CLASS Y	168	520	897	1,955

Expense Example No Redemption (USD $)	1 year	3 years	5 years	10 years
A, C, Y Prospectus PACE® International Emerging Markets Equity Investments CLASS C	267	820	1,400	2,973

Portfolio turnover

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 158% of the average value of its portfolio.

Principal strategies

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.

The fund's investment strategies may result in high portfolio turnover.

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 ("LMCG") 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").

LMCG uses a bottom-up quantitative approach to investing in emerging markets equity securities. Inefficiencies in the market create opportunities, and LMCG 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. LMCG'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 LMCG 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.

Principal risks

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 ge- ographic 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.

High yield securities ("junk bonds") risk: Lower-rated securities (the issuers of which are typically in poor financial health) are subject to higher risks than investment grade securities. For example, lower-rated securities may be (1) subject to a greater risk of loss of principal and non-payment of interest (including default by the issuer); (2) subject to greater price volatility; and (3) less liquid than investment grade securities. The prices of such securities may be more vulnerable to bad economic news, or even the expectation of bad news, than higher rated fixed income securities.

Performance

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 sales charges of the fund's Class C shares; 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. LMCG 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. After-tax returns for other classes will vary from the Class C shares' after-tax returns shown.

PACE International Emerging Markets Equity Investments Annual Total Returns of Class C Shares

Best quarter during calendar years shown—2Q 2009: 31.37%
Worst quarter during calendar years shown—4Q 2008: (28.45)%

Average annual total returns (figures reflect sales charges) (for the periods ended December 31, 2013)

Average Annual Returns A, C, Y Prospectus PACE® International Emerging Markets Equity Investments	Average Annual Returns, 1 Year	Average Annual Returns, 5 Years	Average Annual Returns, 10 Years	Average Annual Returns, Inception Date
CLASS A	(10.21%)	11.33%	8.40%	Dec. 11, 2000
CLASS C	(6.60%)	11.76%	8.20%	Dec. 01, 2000
CLASS Y	(4.80%)	12.88%	9.37%	Feb. 09, 2001
After Taxes on Distributions CLASS C	(6.36%)	11.94%	7.23%
After Taxes on Distributions and Sale of Fund Shares CLASS C	(3.50%)	9.70%	7.10%
MSCI Emerging Markets Index (Index reflects no deduction for fees, expenses or taxes.)	(2.27%)	15.15%	11.52%

[1] Since the "Acquired fund fees and expenses" are not directly borne by the fund, they are not reflected in the fund's financial statements, and therefore the amounts listed in "Total annual fund operating expenses" will differ from those presented in the Financial highlights.

XML

Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

PACE® Money Market Investments

Objective [Heading]

rr_ObjectiveHeading

Investment objective

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

Current income consistent with preservation of capital and liquidity.

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)

Fee Waiver or Reimbursement over Assets, Date of Termination

rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination

2015-03-31

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

The fund is a money market mutual fund and seeks to maintain a stable price of $1.00 per share. To do this, the fund invests in a diversified portfolio of high quality money market instruments of governmental and private issuers.

Money market instruments generally are short-term debt obligations and similar securities. They also may include longer-term bonds that have variable interest rates or other special features that give them the financial characteristics of short-term debt. The fund invests in foreign money market instruments only if they are denominated in US dollars.

Management process

UBS Global Asset Management (Americas) Inc. ("UBS Global AM"), the fund's manager and investment advisor, selects money market instruments for the fund based on its assessment of relative values and changes in market and economic conditions. UBS Global AM considers safety of principal and liquidity in selecting securities for the fund and thus may not buy securities that pay the highest yield.

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. While the fund seeks to maintain the value of your investment at $1.00 per share, you may lose money by investing in the fund. An investment in the fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. Money market instruments generally have a low risk of loss, but they are not risk-free. The principal risks presented by an investment in the fund are:

Credit risk: Issuers of money market instruments may fail to make payments when due, or they may become less willing or less able to do so.

Interest rate risk: The value of the fund's investments generally will fall when short term interest rates rise, and its yield will tend to lag behind prevailing rates.

Market risk: The risk that the market value of the fund's investments may fluctuate, sometimes rapidly or unpredictably, as the markets fluctuate, which may affect the fund's ability to maintain a $1.00 share price. 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.

US Government securities risk: There are different types of US government securities with different levels of credit risk, including the risk of default, depending on the nature of the particular government support for that security. For example, a US government-sponsored entity, such as Federal National Mortgage Association ("Fannie Mae") or Federal Home Loan Mortgage Corporation ("Freddie Mac"), although chartered or sponsored by an Act of Congress, may issue securities that are neither insured nor guaranteed by the US Treasury and are therefore riskier than those that are.

Foreign investing risk: The value of the fund's investments in foreign securities may fall due to adverse political, social and economic developments abroad. Investments in foreign government bonds involve special risks because the fund may have limited legal recourse in the event of default. However, because the fund's foreign investments must be denominated in US dollars, it generally is not subject to the risk of changes in currency valuations.

Liquidity risk: Although the fund invests in a diversified portfolio of high quality instruments, the fund's investments may become less liquid as a result of market developments or adverse investor perception.

Management risk: The risk that the investment strategies, techniques and risk analyses employed by the investment advisor may not produce the desired results.

Risk Money Market Fund [Text]

rr_RiskMoneyMarketFund

While the fund seeks to maintain the value of your investment at $1.00 per share, 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 bank deposit 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. The fund's past performance is not necessarily an indication of how the fund will perform in the future. Updated performance information is available by contacting your Financial Advisor or by calling 1-888-793 8637 (Option #1).

Performance Information Illustrates Variability of Returns [Text]

rr_PerformanceInformationIllustratesVariabilityOfReturns

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.

Performance Availability Phone [Text]

rr_PerformanceAvailabilityPhone

1-888-793 8637 (Option #1)

Performance Past Does Not Indicate Future [Text]

rr_PerformancePastDoesNotIndicateFuture

The fund's past performance is not necessarily an indication of how the fund will perform in the future.

Bar Chart [Heading]

rr_BarChartHeading

PACE Money Market 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

Best quarter during calendar years shown—4Q 2006: 1.20%
Worst quarters during calendar years shown—3Q 2009 & 1Q, 2Q, & 3Q, 2010 & 1Q 2011: 0.00%
(Actual total return was 0.0024%)

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Best quarter during calendar years shown

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Dec. 31, 2006

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

1.20%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Worst quarter during calendar years shown

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Mar. 31, 2011

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

0.00%

Caption

rr_AverageAnnualReturnCaption

Average annual total returns (figures reflect 2% PACE Select Advisors Program Fee) (for the periods ended December 31, 2013)

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 lesser of the offering price or the redemption price)

rr_MaximumDeferredSalesChargeOverOther

none

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

0.25%

Distribution and/or service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

none

Other expenses (includes administration fee of 0.10%)

rr_OtherExpensesOverAssets

0.63%

Total annual fund operating expenses

rr_ExpensesOverAssets

0.88%

Fee Waiver or Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.28%)

^[1]

Total annual fund operating expenses after fee waiver and/or expense reimbursements

rr_NetExpensesOverAssets

0.60%

^[1]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 263

^[2]

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

866

^[2]

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

1,494

^[2]

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 3,185

^[2]

Annual Return 2004

rr_AnnualReturn2004

0.81%

Annual Return 2005

rr_AnnualReturn2005

2.69%

Annual Return 2006

rr_AnnualReturn2006

4.54%

Annual Return 2007

rr_AnnualReturn2007

4.72%

Annual Return 2008

rr_AnnualReturn2008

2.18%

Annual Return 2009

rr_AnnualReturn2009

0.13%

Annual Return 2010

rr_AnnualReturn2010

0.01%

Annual Return 2011

rr_AnnualReturn2011

0.01%

Annual Return 2012

rr_AnnualReturn2012

0.01%

Annual Return 2013

rr_AnnualReturn2013

0.01%

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

(1.97%)

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

(1.95%)

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

(0.52%)

Average Annual Returns, Inception Date

rr_AverageAnnualReturnInceptionDate

Aug. 24, 1995

[1] 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 March 31, 2015 (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 0.60%. 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.

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

XML

A, C, Y Prospectus | PACE® Small/Medium Co Value Equity Investments

PACE® Small/Medium Co Value Equity Investments

Investment objective

Capital appreciation.

Fees and expenses of the fund

These tables describe the fees and expenses that you may pay if you buy and hold shares of the fund. You may qualify for sales charge discounts on purchases of Class A shares if you or your family invest, or agree to invest in the future, at least $50,000 in the UBS family of funds. More information about these and other discounts and waivers, as well as eligibility requirements for each share class, is available from your financial advisor and in "Managing your fund account" on page 109 of the prospectus and in "Reduced sales charges, additional purchase, exchange and redemption information and other services" on page 208 of the fund's Statement of Additional Information.

Shareholder fees (fees paid directly from your investment)

Shareholder Fees A, C, Y Prospectus PACE® Small/Medium Co Value Equity Investments	CLASS A	CLASS C	CLASS Y
Maximum front-end sales charge (load) imposed on purchases (as a % of the offering price)	5.50%	none	none
Maximum deferred sales charge (load) (as a % of the lesser of the offering price or the redemption price)	none	1.00%	none
Exchange fee	none	none	none
Redemption fee (as a % of the amount redeemed within 90 days of purchase, if applicable)	1.00%	1.00%	1.00%

Annual fund operating expenses (expenses that you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses A, C, Y Prospectus PACE® Small/Medium Co Value Equity Investments		CLASS A	CLASS C	CLASS Y
Management fees		0.70%	0.70%	0.70%
Distribution and/or service (12b-1) fees		0.25%	1.00%	none
Other expenses (includes administration fee of 0.10%)		0.33%	0.33%	0.49%
Acquired fund fees and expenses	[1]	0.06%	0.06%	0.06%
Total annual fund operating expenses		1.34%	2.09%	1.25%
Management fee waiver/expense reimbursements	[2]			0.03%
Total annual fund operating expenses after fee waiver and/or expense reimbursements	[2]	1.34%	2.09%	1.22%

Example

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 unless otherwise stated. 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:

Expense Example A, C, Y Prospectus PACE® Small/Medium Co Value Equity Investments (USD $)		1 year	3 years	5 years	10 years
CLASS A	[1]	679	951	1,244	2,074
CLASS C	[1]	312	655	1,124	2,421
CLASS Y	[1]	124	394	683	1,509

Expense Example No Redemption (USD $)		1 year	3 years	5 years	10 years
A, C, Y Prospectus PACE® Small/Medium Co Value Equity Investments CLASS C	[1]	212	655	1,124	2,421

Portfolio turnover

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 97% of the average value of its portfolio.

Principal strategies

Principal investments

The fund invests primarily in stocks of companies that are believed to be undervalued or overlooked in the marketplace. These stocks also generally have price-to-earnings ("P/E") ratios below the market average. 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 issued by small/medium capitalization companies. As of the date of this prospectus, small/medium capitalization companies means companies with a total market capitalization of less than $6.0 billion at the time of purchase. Effective April 28, 2014, small/medium capitalization companies means companies with a total market capitalization within the market capitalization range of the companies in the Russell 2500^® Value Index at the time of purchase. The fund invests only in stocks that are traded on major exchanges or the over-the-counter market.

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 stocks of companies with larger total market capitalizations and other securities, including securities convertible into stocks.

The fund may invest up to 10% of its total assets in non-US securities, which may trade either within or outside the US.

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. Metropolitan West Capital Management, LLC ("MetWest Capital"), Systematic Financial Management, L.P. ("Systematic") and Kayne Anderson Rudnick Investment Management, LLC ("Kayne Anderson Rudnick") 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.

MetWest Capital directly researches smaller capitalization businesses it views as "high-quality" and attempts to identify companies selling below intrinsic value with one or more clear catalysts to realize full value within the investment time horizon (typically two to four years). MetWest Capital utilizes a bottom-up, fundamental, research-driven, low-risk style that it believes is ideally suited to the small cap market segment, along with a long-term focus that attempts to take advantage of opportunities presented by short-term anomalies in high-quality stocks.

Systematic employs an investment approach that utilizes (1) quantitative screening of all companies within the small/mid capitalization universe and (2) fundamental research, which seeks to gauge investor expectations by focusing on key revenue and margin assumptions underlying earnings estimates. Systematic's investment philosophy is predicated on its belief that stock prices reflect the market's estimates of earnings, and as revisions to those estimates are made by the market, stock prices will follow suit. By focusing only on companies whose fundamentals are improving, as confirmed by Systematic's research analysis and as evidenced by a positive earnings surprise, Systematic's process seeks to avoid the chances of buying stocks that have experienced significant price depreciation and, as a result, are mistaken as value stocks. Systematic is expected to typically invest in 60 to 90 securities, with a market capitalization range generally consistent with that of the fund's benchmark.

Kayne Anderson Rudnick employs a fundamental, bottom-up, research-driven investment style and utilizes a disciplined investment process to identify high-quality companies that possess solid investment-grade balance sheets, generate positive cash flow, and whose securities can be acquired at attractive valuations. Kayne Anderson Rudnick's first-hand fundamental research process involves carefully evaluating a company from a three-tiered perspective involving qualitative, financial, and valuation analyses. Qualitative analysis assesses the company's long-term market positioning in terms of market structure and prospects, business model and strategies, and competitive advantages. Financial analysis involves an historical examination of the income statement, cash flow statement, balance sheet, and associated ratios on an absolute and peer relative basis. Valuation analysis determines the current and potential value of each company in the investable universe. The portfolio managers establish price ranges for each security held, these prices are developed in consideration of expected return and comparative valuation, and they are actively monitored. Sector weights are also actively evaluated.

Principal risks

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.

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.

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.

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.

Management risk: The risk that the investment strategies, techniques and risk analyses employed by an investment advisor may not produce the desired results.

Performance

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 sales charges of the fund's Class C shares; 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. On October 1, 2005, MetWest Capital assumed day-to-day management of a portion of the fund's assets. On May 28, 2009, Systematic assumed responsibility for managing a portion of the fund's assets. Kayne Anderson Rudnick assumed day-to-day management of a separate portion of the fund's assets on March 6, 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. After-tax returns for other classes will vary from the Class C shares' after-tax returns shown.

PACE Small/Medium Co Value Equity Investments Annual Total Returns of Class C Shares

Best quarter during calendar years shown—2Q 2009: 27.19%
Worst quarter during calendar years shown—4Q 2008: (27.90)%

Average annual total returns (figures reflect sales charges) (for the periods ended December 31, 2013)

Average Annual Returns A, C, Y Prospectus PACE® Small/Medium Co Value Equity Investments	Average Annual Returns, 1 Year	Average Annual Returns, 5 Years	Average Annual Returns, 10 Years	Average Annual Returns, Inception Date
CLASS A	27.91%	18.31%	6.97%	Nov. 27, 2000
CLASS C	33.43%	18.78%	6.77%	Nov. 27, 2000
CLASS Y	35.53%	19.92%	7.89%	Dec. 20, 2000
After Taxes on Distributions CLASS C	28.93%	17.98%	5.58%
After Taxes on Distributions and Sale of Fund Shares CLASS C	21.72%	15.21%	5.41%
Russell 2500 Value Index (Index reflects no deduction for fees, expenses or taxes.)	33.32%	19.61%	9.29%

[1] Since the "Acquired fund fees and expenses" are not directly borne by the fund, they are not reflected in the fund's financial statements, and therefore the amounts listed in "Total annual fund operating expenses" and "Total annual fund operating expenses after fee waiver and/or expense reimbursements" will differ from those presented in the Financial highlights.

[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 of each class through March 31, 2015 (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 1.41% for Class A, 2.16% for Class C and 1.16% for Class Y. 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 these expense caps. 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.

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

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

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A, C, Y Prospectus | PACE® International Fixed Income Investments

PACE® International Fixed Income Investments

Investment objective

High total return.

Fees and expenses of the fund

These tables describe the fees and expenses that you may pay if you buy and hold shares of the fund. You may qualify for sales charge discounts on purchases of Class A shares if you or your family invest, or agree to invest in the future, at least $100,000 in the UBS family of funds. More information about these and other discounts and waivers, as well as eligibility requirements for each share class, is available from your financial advisor and in "Managing your fund account" on page 109 of the prospectus and in "Reduced sales charges, additional purchase, exchange and redemption information and other services" on page 208 of the fund's Statement of Additional Information.

Shareholder fees (fees paid directly from your investment)

Shareholder Fees A, C, Y Prospectus PACE® International Fixed Income Investments	CLASS A	CLASS C	CLASS Y
Maximum front-end sales charge (load) imposed on purchases (as a % of the offering price)	4.50%	none	none
Maximum deferred sales charge (load) (as a % of the lesser of the offering price or the redemption price)	none	0.75%	none
Exchange fee	none	none	none
Redemption fee (as a % of the amount redeemed within 90 days of purchase, if applicable)	1.00%	1.00%	1.00%

Annual fund operating expenses (expenses that you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses A, C, Y Prospectus PACE® International Fixed Income Investments		CLASS A	CLASS C	CLASS Y
Management fees		0.65%	0.65%	0.65%
Distribution and/or service (12b-1) fees		0.25%	0.75%	none
Other expenses (includes administration fee of 0.10%)		0.37%	0.35%	0.44%
Total annual fund operating expenses		1.27%	1.75%	1.09%
Management fee waiver/expense reimbursements	[1]	0.05%	0.06%	0.09%
Total annual fund operating expenses after fee waiver and/or expense reimbursements	[1]	1.22%	1.69%	1.00%

Example

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 unless otherwise stated. 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:

Expense Example A, C, Y Prospectus PACE® International Fixed Income Investments (USD $)		1 year	3 years	5 years	10 years
CLASS A	[1]	569	830	1,111	1,911
CLASS C	[1]	247	545	943	2,057
CLASS Y	[1]	102	338	592	1,321

Expense Example No Redemption (USD $)		1 year	3 years	5 years	10 years
A, C, Y Prospectus PACE® International Fixed Income Investments CLASS C	[1]	172	545	943	2,057

Portfolio turnover

The fund pays transaction costs, such as commissions or dealer spreads, 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 63% of the average value of its portfolio.

Principal strategies

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 fixed income securities. Such investments may include non-US government bonds (including bonds issued by supranational organizations and quasi-governmental entities), US government bonds, and bonds of US or non-US private issuers. While the fund may invest in US fixed income securities, it expects to invest mainly in non-US fixed income securities under normal circumstances. The fund invests primarily in high-grade bonds of governmental and private issuers in developed countries. These high-grade bonds are rated in one of the three highest rating categories or are of comparable quality. The fund invests, to a limited extent, in emerging market bonds and lower rated bonds of governmental and private issuers, including bonds that are rated below investment grade (commonly known as "junk bonds").

The fund invests in bonds of varying maturities, but normally limits its portfolio "duration" to between four and eight years. Duration is a measure of the fund's exposure to interest rate risk—a longer duration means that changes in market interest rates are likely to have a larger effect on the value of the fund's portfolio.

The fund's investments may include mortgage- and asset-backed securities. The fund may, but is not required to, use exchange-traded or over-the-counter derivative instruments for risk management purposes or to attempt to increase total returns. The derivatives in which the fund may invest include currency forward agreements. These derivatives may be used for risk management purposes, such as hedging the fund's currency exposure, or otherwise managing the risk profile of the fund. In addition, these derivative instruments may be used to enhance returns; in place of direct investments; or to obtain or adjust exposure to certain markets.

There are different types of US government securities, including those issued or guaranteed by the US government, its agencies and its instrumentalities, and they have different types of government support. Some are supported by the full faith and credit of the US, while others are supported by (1) the ability of the issuer to borrow from the US Treasury; (2) the credit of the issuing agency, instrumentality or government-sponsored entity; (3) pools of assets, such as mortgages; or (4) the US government in some other way.

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. Rogge Global Partners plc ("Rogge Global Partners") currently serves as the fund's investment advisor. Rogge Global Partners seeks to invest in bonds of financially healthy entities because it believes that these investments produce the highest bond and currency returns over time. In deciding which bonds to buy for the fund, Rogge Global Partners uses a top-down analysis to find value across countries and to forecast interest and currency-exchange rates over a one-year horizon in those countries, and an optimization model to help determine country, currency and duration positions for the fund. Rogge Global Partners generally sells securities (1) that no longer meet these selection criteria; (2) when it identifies more attractive investment opportunities; or (3) to adjust the average duration of the fund assets it manages. Rogge Global Partners may hedge the fund's exposure to foreign currencies to varying degrees as it deems appropriate.

Principal risks

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:

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.

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.

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.

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.

Prepayment risk: The fund's mortgage- and asset-backed securities may be prepaid more rapidly than expected, especially when interest rates are falling, and the fund may have to reinvest those prepayments at lower interest rates. When interest rates are rising, slower prepayments may extend the duration of the securities and may reduce their value.

Derivatives risk: The value of "derivatives"—so called because their value "derives" from the value of an underlying asset, reference rate or index—may rise or fall more rapidly than other investments. When using derivatives for non-hedging purposes, it is possible for the fund to lose more than the amount it invested in the derivative. When using derivatives for hedging purposes, the fund's overall returns may be reduced if the hedged investment experiences a favorable price movement. The risks of investing in derivative instruments also include market and management risks. Derivatives relating to fixed income markets are especially susceptible to interest rate risk and credit risk. In addition, many types of non-exchange traded derivatives may be subject to liquidity risk, counterparty risk, credit risk and mispricing or valuation complexity. These derivatives risks are different from, and may be greater than, the risks associated with investing directly in securities and other instruments.

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.

US Government securities risk: There are different types of US government securities with different levels of credit risk, including the risk of default, depending on the nature of the particular government support for that security. For example, a US government-sponsored entity, such as Federal National Mortgage Association ("Fannie Mae") or Federal Home Loan Mortgage Corporation ("Freddie Mac"), although chartered or sponsored by an Act of Congress, may issue securities that are neither insured nor guaranteed by the US Treasury and are therefore riskier than those that are.

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.

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.

High yield securities ("junk bonds") risk: Lower-rated securities (the issuers of which are typically in poor financial health) are subject to higher risks than investment grade securities. For example, lower-rated securities may be (1) subject to a greater risk of loss of principal and non-payment of interest (including default by the issuer); (2) subject to greater price volatility; and (3) less liquid than investment grade securities. The prices of such securities may be more vulnerable to bad economic news, or even the expectation of bad news, than higher rated fixed income securities.

Management risk: The risk that the investment strategies, techniques and risk analyses employed by the investment advisor may not produce the desired results.

Mortgage-related securities risk: Mortgage-related securities are subject to risks that are different from and/or more acute than risks associated with other types of debt instruments. Such risks may include prepayment risk, as discussed above. Conversely, in periods of rising interest rates, the fund may be subject to extension risk, and may receive principal later than expected, causing additional volatility. During periods of difficult or frozen credit markets, significant changes in interest rates, or deteriorating economic conditions, such securities may decline in value, face valuation difficulties, become more volatile and become illiquid. Certain types of mortgage-backed securities (e.g., CMOs and stripped mortgage-backed securities) can be even more volatile and may be more sensitive to the rate of prepayments than other mortgage-related securities. The risk of default for "sub-prime" mortgages is generally higher than other types of mortgage-backed securities. The structure of some of these securities may be complex, and there may be less available information than other types of debt securities.

Performance

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 sales charges of the fund's Class C shares; 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 Barclays Global Aggregate ex USD 50% Hedged Index provides information regarding the effectiveness of the fund's currency hedging policy. 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 between October 10, 2000 and August 22, 2007, when Rogge Global Partners and another investment advisor each was responsible for managing a separate portion of the fund's assets. In addition, prior to December 1, 2005, the fund had been following a strategy of investing in both US and non-US fixed income investments, but effective as of that date, the fund modified its strategy to focus more on non-US fixed income investment opportunities. 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. After-tax returns for other classes will vary from the Class C shares' after-tax returns shown.

PACE International Fixed Income Investments Annual Total Returns of Class C Shares

Best quarter during calendar years shown—3Q 2010: 11.26%
Worst quarter during calendar years shown—3Q 2008: (7.50)%

Average annual total returns (figures reflect sales charges) (for the periods ended December 31, 2013)

Average Annual Returns A, C, Y Prospectus PACE® International Fixed Income Investments	Average Annual Returns, 1 Year	Average Annual Returns, 5 Years	Average Annual Returns, 10 Years	Average Annual Returns, Inception Date
CLASS A	(10.55%)	2.13%	2.97%	Dec. 11, 2000
CLASS C	(7.41%)	2.61%	2.95%	Dec. 01, 2000
CLASS Y	(6.07%)	3.36%	3.75%	Jan. 16, 2001
After Taxes on Distributions CLASS C	(7.76%)	1.35%	1.47%
After Taxes on Distributions and Sale of Fund Shares CLASS C	(4.19%)	1.59%	1.77%
Barclays Global Aggregate ex US Index (Indices reflect no deduction for fees, expenses or taxes.)	(3.08%)	3.51%	4.35%
Barclays Global Aggregate ex USD 50% Hedged Index (Indices reflects no deduction for fees, expenses or taxes.)	(0.94%)	3.76%	4.41%

[1] 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: (1) waive its management fees through March 31, 2015 to the extent necessary to reflect the lower sub-advisory fee paid by UBS Global AM to Rogge Global Partners plc, the fund's investment advisor; and (2) waive its management fees and/or reimburse expenses so that the fund's ordinary total operating expenses of each class through March 31, 2015 (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 1.25% for Class A, 1.75% for Class C and 1.00% for Class Y. The fund has agreed to repay UBS Global AM for any waived fees/reimbursed expenses (pursuant to item (2)) 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 these expense caps. 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.

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

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

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A, C, Y Prospectus | PACE® Municipal Fixed Income Investments

PACE® Municipal Fixed Income Investments

Investment objective

High current income exempt from federal income tax.

Fees and expenses of the fund

These tables describe the fees and expenses that you may pay if you buy and hold shares of the fund. You may qualify for sales charge discounts on purchases of Class A shares if you or your family invest, or agree to invest in the future, at least $100,000 in the UBS family of funds. More information about these and other discounts and waivers, as well as eligibility requirements for each share class, is available from your financial advisor and in "Managing your fund account" on page 109 of the prospectus and in "Reduced sales charges, additional purchase, exchange and redemption information and other services" on page 208 of the fund's Statement of Additional Information.

Shareholder fees (fees paid directly from your investment)

Shareholder Fees A, C, Y Prospectus PACE® Municipal Fixed Income Investments	Class A	Class C	Class Y
Maximum front-end sales charge (load) imposed on purchases (as a % of the offering price)	4.50%	none	none
Maximum deferred sales charge (load) (as a % of the lesser of the offering price or the redemption price)	none	0.75%	none
Exchange fee	none	none	none
Redemption fee (as a % of the amount redeemed within 90 days of purchase, if applicable)	1.00%	1.00%	1.00%

Annual fund operating expenses (expenses that you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses A, C, Y Prospectus PACE® Municipal Fixed Income Investments		Class A	Class C	Class Y
Management fees		0.44%	0.44%	0.44%
Distribution and/or service (12b-1) fees		0.25%	0.75%	none
Other expenses (includes administration fee of 0.10%)		0.24%	0.25%	0.28%
Total annual fund operating expenses		0.93%	1.44%	0.72%
Management fee waiver/expense reimbursements	[1]	0.03%	0.04%	0.07%
Total annual fund operating expenses after fee waiver and/or expense reimbursements	[1]	0.90%	1.40%	0.65%

Example

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 unless otherwise stated. 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:

Expense Example A, C, Y Prospectus PACE® Municipal Fixed Income Investments (USD $)		1 year	3 years	5 years	10 years
Class A	[1]	538	730	939	1,539
Class C	[1]	218	452	783	1,721
Class Y	[1]	66	223	394	888

Expense Example No Redemption (USD $)		1 year	3 years	5 years	10 years
A, C, Y Prospectus PACE® Municipal Fixed Income Investments Class C	[1]	143	452	783	1,721

Portfolio turnover

The fund pays transaction costs, such as commissions or dealer spreads, 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 69% of the average value of its portfolio.

Principal strategies

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 municipal fixed income investments, the income from which is exempt from regular federal income taxes. The fund invests principally in investment grade municipal bonds of varying maturities. Normally, the fund limits its investments in municipal bonds that are subject to the federal alternative minimum tax ("AMT") so that not more than 25% of its interest income will be subject to the AMT, and invests in these bonds when its investment advisor believes that they offer attractive yields relative to similar municipal bonds that are not subject to the AMT.

The fund normally limits its portfolio "duration" to between three and seven years. Duration is a measure of the fund's exposure to interest rate risk—a longer duration means that changes in market interest rates are likely to have a larger effect on the value of the fund's portfolio.

The fund may invest up to 50% of its total assets in municipal bonds that are secured by revenues from public housing authorities and state and local housing finance authorities, including bonds that are secured or backed by the US Treasury or other US government guaranteed securities. There are different types of US government securities, including those issued or guaranteed by the US government, its agencies and its instrumentalities, and they have different types of government support. Some are supported by the full faith and credit of the US, while others are supported by (1) the ability of the issuer to borrow from the US Treasury; (2) the credit of the issuing agency, instrumentality or government-sponsored entity; (3) pools of assets, such as mortgages; or (4) the US government in some other way.

The fund limits its investments in municipal bonds with the lowest investment grade rating (or unrated bonds of equivalent quality) to 15% of its total assets at the time the bonds are purchased.

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. Standish Mellon Asset Management Company LLC ("Standish") currently serves as the fund's investment advisor. In deciding which securities to buy for the fund, Standish seeks to identify undervalued sectors or geographical regions of the municipal market or undervalued individual securities, by using credit research and valuation analysis and monitoring the relationship of the municipal yield curve to the treasury yield curve. Standish also uses credit quality assessments from its in-house analysts to identify potential rating changes, undervalued issues and macro trends with regard to market sectors and geographical regions. Standish may make modest duration adjustments based on economic analyses and interest rate forecasts. Standish generally sells securities (1) if it identifies more attractive investment opportunities within its investment criteria; (2) with weakening credit profiles; or (3) to adjust the average duration of the fund's portfolio.

Principal risks

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:

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.

Municipal securities risk: Municipal securities are subject to interest rate and credit risks. The ability of a municipal issuer to make payments and the value of municipal securities can be affected by uncertainties in the municipal securities market. Such uncertainties could cause increased volatility in the municipal securities market and could negatively impact the fund's net asset value and/or the distributions paid by the fund. Municipal bonds secured by revenues from public housing authorities may be subject to additional uncertainties relating to the possibility that proceeds may exceed supply of available mortgages to be purchased by public housing authorities, resulting in early retirement of bonds, or that homeowner repayments will create an irregular cash flow. Municipalities continue to experience difficulties in the current economic and political environment.

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.

Related securities concentration risk: Because the fund may invest more than 25% of its total assets in municipal bonds that are issued to finance similar projects, changes that affect one type of municipal bond may have a significant impact on the value of the fund.

US Government securities risk: There are different types of US government securities with different levels of credit risk, including the risk of default, depending on the nature of the particular government support for that security. For example, a US government-sponsored entity, such as Federal National Mortgage Association ("Fannie Mae") or Federal Home Loan Mortgage Corporation ("Freddie Mac"), although chartered or sponsored by an Act of Congress, may issue securities that are neither insured nor guaranteed by the US Treasury and are therefore riskier than those that are.

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.

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.

Management risk: The risk that the investment strategies, techniques and risk analyses employed by the investment advisor may not produce the desired results.

Performance

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 sales charges of the fund's Class C shares; 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. 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. After-tax returns for other classes will vary from the Class C shares' after-tax returns shown.

PACE Municipal Fixed Income Investments Annual Total Returns of Class C Shares

Best quarter during calendar years shown—3Q 2009: 5.93%
Worst quarter during calendar years shown—4Q 2010: (3.31)%

Average annual total returns (figures reflect sales charges) (for the periods ended December 31, 2013)

Average Annual Returns A, C, Y Prospectus PACE® Municipal Fixed Income Investments	Average Annual Returns, 1 Year	Average Annual Returns, 5 Years	Average Annual Returns, 10 Years	Average Annual Returns, Inception Date
Class A	(6.39%)	3.75%	2.73%	Jan. 23, 2001
Class C	(3.15%)	4.17%	2.68%	Dec. 04, 2000
Class Y	(1.70%)	4.97%	3.44%	Feb. 23, 2001
After Taxes on Distributions Class C	(3.32%)	4.11%	2.65%
After Taxes on Distributions and Sale of Fund Shares Class C	(0.81%)	3.80%	2.65%
Barclays US Municipal 3-15 Year Blend Index (Index reflects no deduction for fees, expenses or taxes.)	(1.24%)	5.15%	4.26%

[1] 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 of each class through March 31, 2015 (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 0.90% for Class A, 1.40% for Class C and 0.65% for Class Y. 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 these expense caps. 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.

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

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

XML

Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

PACE® High Yield Investments

Objective [Heading]

rr_ObjectiveHeading

Investment objective

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

Total return.

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. You may qualify for sales charge discounts on purchases of Class A shares if you or your family invest, or agree to invest in the future, at least $100,000 in the UBS family of funds. More information about these and other discounts and waivers, as well as eligibility requirements for each share class, is available from your financial advisor and in "Managing your fund account" on page 109 of the prospectus and in "Reduced sales charges, additional purchase, exchange and redemption information and other services" on page 208 of the fund's Statement of Additional Information.

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 or dealer spreads, 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 26% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

26.00%

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 unless otherwise stated. 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

The fund seeks to achieve its objective by investing primarily in a professionally managed, diversified portfolio of fixed income securities rated below investment grade. Under normal circumstances, the fund invests at least 80% of its net assets (plus the amount of any borrowing for investment purposes) in high yield fixed income securities that are rated below investment grade or considered to be of comparable quality (commonly known as "junk bonds").

These investments will include fixed income securities that are (1) rated below investment grade (lower than a Baa rating by Moody's Investors Service, Inc. ("Moody's") or lower than a BBB rating by Standard and Poor's, a division of The McGraw Hill Companies Inc. ("S&P")); (2) comparably rated by another nationally recognized statistical rating organization (collectively, with Moody's and S&P, "Rating Agencies"); or (3) unrated, but deemed by the fund's investment advisor to be of comparable quality to fixed income securities rated below Baa, BBB or a comparable rating by a Rating Agency.

The fund may invest up to 10% of its total assets in US and/or non-US senior secured bank loans (each of which may be denominated in foreign currencies), which may be in the form of loan participations and assignments. The fund may invest in a number of different countries throughout the world, including the US.

Under normal circumstances, the fund's average duration will be within +/- 50% of that of the BofA Merrill Lynch Global High Yield Index, as calculated by the investment advisor, which as of December 31, 2013 was approximately 2.97 years. Duration is a measure of the fund's exposure to interest rate risk—a longer duration means that changes in market interest rates are likely to have a larger effect on the value of the fund's portfolio. The fund has no average targeted portfolio maturity.

The fund may, but is not required to, use exchange-traded or over-the-counter derivative instruments for risk management purposes or to attempt to increase total returns. The derivatives in which the fund may invest include futures (specifically, interest rate futures) and currency forward agreements. These derivatives may be used for risk management purposes, such as hedging the fund's currency exposure, or otherwise managing the risk profile of the fund. In addition, the derivative instruments listed above may be used to obtain or adjust exposure to certain markets. Interest rate futures may also be used to adjust the fund's portfolio duration.

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. MacKay Shields LLC ("MacKay Shields") currently serves as the fund's investment advisor. MacKay Shields attempts to deliver attractive risk adjusted returns by avoiding most of the unusually large losses in the high yield market, even if it means giving up much of the large potential gains. MacKay Shields believes that there is a very small subset of bonds that delivers outsized gains in the market. Due to the limited upside inherent in most bonds, over time, outsized gains are expected to be smaller than unusually large losses. By attempting to limit the fund's participation in the extremes of the market, MacKay Shields strives to add value over a market cycle and with lower volatility through a rigorous process that attempts to screen out what it believes to be the riskiest issuers in the market.

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:

High yield securities ("junk bonds") risk: Lower-rated securities (the issuers of which are typically in poor financial health) are subject to higher risks than investment grade securities. For example, lower-rated securities may be (1) subject to a greater risk of loss of principal and non-payment of interest (including default by the issuer); (2) subject to greater price volatility; and (3) less liquid than investment grade securities. The prices of such securities may be more vulnerable to bad economic news, or even the expectation of bad news, than higher rated fixed income securities.

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.

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.

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.

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.

Valuation risk: During periods of reduced market liquidity or in the absence of readily available market quotations, the ability of the fund to value the fund's securities becomes more difficult and the judgment of the fund's manager and investment advisor may play a greater role in the valuation of the securities due to reduced availability of reliable objective pricing data.

Derivatives risk: The value of "derivatives"—so called because their value "derives" from the value of an underlying asset, reference rate or index—may rise or fall more rapidly than other investments. When using deriv- atives for non-hedging purposes, it is possible for the fund to lose more than the amount it invested in the derivative. When using derivatives for hedging purposes, the fund's overall returns may be reduced if the hedged investment experiences a favorable price movement. The risks of investing in derivative instruments also include market and management risks. Derivatives relating to fixed income markets are especially susceptible to interest rate risk and credit risk. In addition, many types of non-exchange traded derivatives may be subject to liquidity risk, counterparty risk, credit risk and mispricing or valuation complexity. These derivatives risks are different from, and may be greater than, the risks associated with investing directly in securities and other instruments.

Swap agreement risk: The fund may enter into various types of swap agreements. Swap agreements can be less liquid and more difficult to value than other investments. Because its cash flows are based in part on changes in the value of the reference asset, a total return swap's market value will vary with changes in that reference asset. In addition, the fund may experience delays in payment or loss of income if the counterparty fails to perform under the contract.

Loan investments risk: In addition to those risks typically associated with investments in debt securities, investments in bank loans are subject to the risk that the collateral securing a loan may not provide sufficient protection to the fund. With respect to participations in loans, the fund's contractual relationship is typically with the lender (rather than the borrower). Consequently, the fund may have limited rights of enforcement against the borrower and assumes the credit risk of both the lender and the borrower. Investments in bank loans may be relatively illiquid, which could adversely affect the value of these investments and the fund's ability to dispose of them.

Structured security risk: The fund may purchase securities representing interests in underlying assets, but structured to provide certain advantages not inherent in those assets (e.g., enhanced liquidity and yields linked to short-term interest rates). If those securities behaved in a way that the fund's investment advisor did not anticipate, or if the security structures encountered unexpected difficulties, the fund could suffer a loss.

Management risk: The risk that the investment strategies, techniques and risk analyses employed by the investment advisor may not produce the desired results.

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 sales charges of the fund's Class A shares; 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. 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. After-tax returns for other classes will vary from the Class A shares' after-tax returns shown.

Performance Information Illustrates Variability of Returns [Text]

rr_PerformanceInformationIllustratesVariabilityOfReturns

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.

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 High Yield Invesments Annual Total Returns of Class A Shares (2007 was Class A's first full calendar year of operations)

Bar Chart Does Not Reflect Sales Loads [Text]

rr_BarChartDoesNotReflectSalesLoads

The bar chart does not reflect the sales charges of the fund's Class A shares; if it did, the total returns shown would be lower.

Bar Chart Closing [Text Block]

rr_BarChartClosingTextBlock

Best quarter during calendar years shown—2Q 2009: 20.87%
Worst quarter during calendar years shown—4Q 2008: (12.47)%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Best quarter during calendar years shown

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Jun. 30, 2009

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

20.87%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Worst quarter during calendar years shown

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Dec. 31, 2008

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(12.47%)

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.

Performance Table One Class of after Tax Shown [Text]

rr_PerformanceTableOneClassOfAfterTaxShown

After-tax returns for other classes will vary from the Class A shares' after-tax returns shown.

Caption

rr_AverageAnnualReturnCaption

Average annual total returns (figures reflect sales charges) (for the periods ended December 31, 2013

BofA Merrill Lynch Global High Yield Index (hedged in USD) (Index reflects no deduction for fees, expenses or taxes.)

Risk/Return:

rr_RiskReturnAbstract

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

7.10%

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

19.49%

Average Annual Returns, Life of Class

rr_AverageAnnualReturnSinceInception

^[1]

Class A

Risk/Return:

rr_RiskReturnAbstract

Maximum front-end sales charge (load) imposed on purchases (as a % of the offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

4.50%

Maximum deferred sales charge (load) (as a % of the lesser of the offering price or the redemption price)

rr_MaximumDeferredSalesChargeOverOther

none

Redemption Fee (as a percentage of Amount Redeemed)

rr_RedemptionFeeOverRedemption

(1.00%)

Exchange fee

rr_ExchangeFeeOverRedemption

none

Management fees

rr_ManagementFeesOverAssets

0.70%

Distribution and/or service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Other expenses (includes administration fee of 0.10%)

rr_OtherExpensesOverAssets

0.32%

Total annual fund operating expenses

rr_ExpensesOverAssets

1.27%

Expense Breakpoint Discounts [Text]

rr_ExpenseBreakpointDiscounts

You may qualify for sales charge discounts on purchases of Class A shares if you or your family invest, or agree to invest in the future, at least $100,000 in the UBS family of funds.

Expense Breakpoint, Minimum Investment Required [Amount]

rr_ExpenseBreakpointMinimumInvestmentRequiredAmount

$ 100,000

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

574

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

835

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

1,116

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,915

Annual Return 2007

rr_AnnualReturn2007

1.22%

Annual Return 2008

rr_AnnualReturn2008

(18.72%)

Annual Return 2009

rr_AnnualReturn2009

50.39%

Annual Return 2010

rr_AnnualReturn2010

14.94%

Annual Return 2011

rr_AnnualReturn2011

(0.22%)

Annual Return 2012

rr_AnnualReturn2012

18.13%

Annual Return 2013

rr_AnnualReturn2013

6.38%

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

1.64%

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

15.66%

Average Annual Returns, Life of Class

rr_AverageAnnualReturnSinceInception

7.95%

Average Annual Returns, Inception Date

rr_AverageAnnualReturnInceptionDate

May 01, 2006

Class A | After Taxes on Distributions

Risk/Return:

rr_RiskReturnAbstract

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

(0.79%)

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

12.62%

Average Annual Returns, Life of Class

rr_AverageAnnualReturnSinceInception

5.21%

Class A | After Taxes on Distributions and Sale of Fund Shares

Risk/Return:

rr_RiskReturnAbstract

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

0.89%

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

11.31%

Average Annual Returns, Life of Class

rr_AverageAnnualReturnSinceInception

5.08%

Class C

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 lesser of the offering price or the redemption price)

rr_MaximumDeferredSalesChargeOverOther

0.75%

Redemption Fee (as a percentage of Amount Redeemed)

rr_RedemptionFeeOverRedemption

(1.00%)

Exchange fee

rr_ExchangeFeeOverRedemption

none

Management fees

rr_ManagementFeesOverAssets

0.70%

Distribution and/or service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

0.75%

Other expenses (includes administration fee of 0.10%)

rr_OtherExpensesOverAssets

0.28%

Total annual fund operating expenses

rr_ExpensesOverAssets

1.73%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

251

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

545

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

939

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

2,041

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

176

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

545

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

939

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

2,041

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

5.15%

Average Annual Returns, Life of Class

rr_AverageAnnualReturnSinceInception

15.34%

Average Annual Returns, Inception Date

rr_AverageAnnualReturnInceptionDate

Jan. 21, 2009

Class Y

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 lesser of the offering price or the redemption price)

rr_MaximumDeferredSalesChargeOverOther

none

Redemption Fee (as a percentage of Amount Redeemed)

rr_RedemptionFeeOverRedemption

(1.00%)

Exchange fee

rr_ExchangeFeeOverRedemption

none

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

0.32%

Total annual fund operating expenses

rr_ExpensesOverAssets

1.02%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

104

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

325

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

563

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 1,248

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

6.64%

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

17.07%

Average Annual Returns, Life of Class

rr_AverageAnnualReturnSinceInception

18.11%

Average Annual Returns, Inception Date

rr_AverageAnnualReturnInceptionDate

Dec. 26, 2008

[1] Average annual total returns for the BofA Merrill Lynch Global High Yield Index (hedged in USD) for the life of each class were as follows: Class A-9.13%; Class C-18.55%; Class Y-20.33%.

XML

Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

PACE® Global Real Estate Securities Investments

Objective [Heading]

rr_ObjectiveHeading

Investment objective

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

Total return.

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. You may qualify for sales charge discounts on purchases of Class A shares if you or your family invest, or agree to invest in the future, at least $50,000 in the UBS family of funds. More information about these and other discounts and waivers, as well as eligibility requirements for each share class, is available from your financial advisor and in "Managing your fund account" on page 109 of the prospectus and in "Reduced sales charges, additional purchase, exchange and redemption information and other services" on page 208 of the fund's Statement of Additional Information.

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)

Fee Waiver or Reimbursement over Assets, Date of Termination

rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination

2015-03-31

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 92% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

92.00%

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 unless otherwise stated. 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

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

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. CBRE Clarion 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).

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:

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. 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.

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.

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 [Text]

rr_RiskLoseMoney

You may lose money by investing in the fund.

Risk Nondiversified Status [Text]

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 [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]

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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 sales charges of the fund's Class C shares; 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. After-tax returns for other classes will vary from the Class C shares' after-tax returns shown.

Performance Information Illustrates Variability of Returns [Text]

rr_PerformanceInformationIllustratesVariabilityOfReturns

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.

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]

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PACE Global Real Estate Securities Investments Annual Total Returns of Class C Shares (2007 was Class C's first full calendar year of operations)

Bar Chart Does Not Reflect Sales Loads [Text]

rr_BarChartDoesNotReflectSalesLoads

The bar chart does not reflect the sales charges of the fund's Class C shares; if it did, the total returns shown would be lower.

Bar Chart Closing [Text Block]

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Best quarter during calendar years shown—2Q 2009: 25.64%
Worst quarter during calendar years shown—4Q 2008: (33.27)%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Best quarter during calendar years shown

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Jun. 30, 2009

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

25.64%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Worst quarter during calendar years shown

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Dec. 31, 2008

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(33.27%)

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.

Performance Table One Class of after Tax Shown [Text]

rr_PerformanceTableOneClassOfAfterTaxShown

After-tax returns for other classes will vary from the Class C shares' after-tax returns shown.

Caption

rr_AverageAnnualReturnCaption

Average annual total returns (figures reflect sales charges) (for the periods ended December 31, 2013)

FTSE EPRA/NAREIT Developed Index (Index reflects no deduction for fees, expenses or taxes.)

Risk/Return:

rr_RiskReturnAbstract

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

4.39%

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

16.06%

Average Annual Returns, Life of Class

rr_AverageAnnualReturnSinceInception

^[1]

Class A

Risk/Return:

rr_RiskReturnAbstract

Maximum front-end sales charge (load) imposed on purchases (as a % of the offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

5.50%

Maximum deferred sales charge (load) (as a % of the lesser of the offering price or the redemption price)

rr_MaximumDeferredSalesChargeOverOther

none

Redemption Fee (as a percentage of Amount Redeemed)

rr_RedemptionFeeOverRedemption

(1.00%)

Exchange fee

rr_ExchangeFeeOverRedemption

none

Management fees

rr_ManagementFeesOverAssets

0.70%

Distribution and/or service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Other expenses (includes administration fee of 0.10%)

rr_OtherExpensesOverAssets

0.61%

Total annual fund operating expenses

rr_ExpensesOverAssets

1.56%

Fee Waiver or Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.11%)

^[2]

Total annual fund operating expenses after fee waiver and/or expense reimbursements

rr_NetExpensesOverAssets

1.45%

^[2]

Expense Breakpoint Discounts [Text]

rr_ExpenseBreakpointDiscounts

You may qualify for sales charge discounts on purchases of Class A shares if you or your family invest, or agree to invest in the future, at least $50,000 in the UBS family of funds.

Expense Breakpoint, Minimum Investment Required [Amount]

rr_ExpenseBreakpointMinimumInvestmentRequiredAmount

$ 50,000

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

689

^[3]

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

1,005

^[3]

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

1,343

^[3]

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

2,296

^[3]

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

(1.89%)

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

11.85%

Average Annual Returns, Life of Class

rr_AverageAnnualReturnSinceInception

(2.46%)

Average Annual Returns, Inception Date

rr_AverageAnnualReturnInceptionDate

Dec. 18, 2006

Class C

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 lesser of the offering price or the redemption price)

rr_MaximumDeferredSalesChargeOverOther

1.00%

Redemption Fee (as a percentage of Amount Redeemed)

rr_RedemptionFeeOverRedemption

(1.00%)

Exchange fee

rr_ExchangeFeeOverRedemption

none

Management fees

rr_ManagementFeesOverAssets

0.70%

Distribution and/or service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

1.00%

Other expenses (includes administration fee of 0.10%)

rr_OtherExpensesOverAssets

0.57%

Total annual fund operating expenses

rr_ExpensesOverAssets

2.27%

Fee Waiver or Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.07%)

^[2]

Total annual fund operating expenses after fee waiver and/or expense reimbursements

rr_NetExpensesOverAssets

2.20%

^[2]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

323

^[3]

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

703

^[3]

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

1,209

^[3]

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

2,600

^[3]

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

223

^[3]

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

703

^[3]

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

1,209

^[3]

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

2,600

^[3]

Annual Return 2007

rr_AnnualReturn2007

(6.72%)

Annual Return 2008

rr_AnnualReturn2008

(49.90%)

Annual Return 2009

rr_AnnualReturn2009

26.32%

Annual Return 2010

rr_AnnualReturn2010

15.22%

Annual Return 2011

rr_AnnualReturn2011

(7.18%)

Annual Return 2012

rr_AnnualReturn2012

28.07%

Annual Return 2013

rr_AnnualReturn2013

2.88%

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

1.88%

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

12.22%

Average Annual Returns, Life of Class

rr_AverageAnnualReturnSinceInception

(2.46%)

Average Annual Returns, Inception Date

rr_AverageAnnualReturnInceptionDate

Dec. 18, 2006

Class C | After Taxes on Distributions

Risk/Return:

rr_RiskReturnAbstract

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

1.39%

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

10.61%

Average Annual Returns, Life of Class

rr_AverageAnnualReturnSinceInception

(3.60%)

Class C | After Taxes on Distributions and Sale of Fund Shares

Risk/Return:

rr_RiskReturnAbstract

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

1.07%

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

9.06%

Average Annual Returns, Life of Class

rr_AverageAnnualReturnSinceInception

(2.26%)

Class Y

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 lesser of the offering price or the redemption price)

rr_MaximumDeferredSalesChargeOverOther

none

Redemption Fee (as a percentage of Amount Redeemed)

rr_RedemptionFeeOverRedemption

(1.00%)

Exchange fee

rr_ExchangeFeeOverRedemption

none

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

0.69%

Total annual fund operating expenses

rr_ExpensesOverAssets

1.39%

Fee Waiver or Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.19%)

^[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

122

^[3]

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

421

^[3]

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

742

^[3]

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 1,652

^[3]

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

4.07%

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

13.44%

Average Annual Returns, Life of Class

rr_AverageAnnualReturnSinceInception

14.05%

Average Annual Returns, Inception Date

rr_AverageAnnualReturnInceptionDate

Dec. 26, 2008

[1] Average annual total returns for the FTSE EPRA/NAREIT Developed Index for the life of each class were as follows: Class A-0.68%; Class C-0.68%; Class Y-16.35%.

[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 of each class through March 31, 2015 (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 1.45% for Class A, 2.20% for Class C and 1.20% for Class Y. 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 these expense caps. 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.

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

XML

Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

PACE® International Fixed Income Investments

Objective [Heading]

rr_ObjectiveHeading

Investment objective

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

High total return.

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. You may qualify for sales charge discounts on purchases of Class A shares if you or your family invest, or agree to invest in the future, at least $100,000 in the UBS family of funds. More information about these and other discounts and waivers, as well as eligibility requirements for each share class, is available from your financial advisor and in "Managing your fund account" on page 109 of the prospectus and in "Reduced sales charges, additional purchase, exchange and redemption information and other services" on page 208 of the fund's Statement of Additional Information.

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)

Fee Waiver or Reimbursement over Assets, Date of Termination

rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination

2015-03-31

Portfolio Turnover [Heading]

rr_PortfolioTurnoverHeading

Portfolio turnover

Portfolio Turnover [Text Block]

rr_PortfolioTurnoverTextBlock

The fund pays transaction costs, such as commissions or dealer spreads, 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 63% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

63.00%

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 unless otherwise stated. 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 fixed income securities. Such investments may include non-US government bonds (including bonds issued by supranational organizations and quasi-governmental entities), US government bonds, and bonds of US or non-US private issuers. While the fund may invest in US fixed income securities, it expects to invest mainly in non-US fixed income securities under normal circumstances. The fund invests primarily in high-grade bonds of governmental and private issuers in developed countries. These high-grade bonds are rated in one of the three highest rating categories or are of comparable quality. The fund invests, to a limited extent, in emerging market bonds and lower rated bonds of governmental and private issuers, including bonds that are rated below investment grade (commonly known as "junk bonds").

The fund invests in bonds of varying maturities, but normally limits its portfolio "duration" to between four and eight years. Duration is a measure of the fund's exposure to interest rate risk—a longer duration means that changes in market interest rates are likely to have a larger effect on the value of the fund's portfolio.

The fund's investments may include mortgage- and asset-backed securities. The fund may, but is not required to, use exchange-traded or over-the-counter derivative instruments for risk management purposes or to attempt to increase total returns. The derivatives in which the fund may invest include currency forward agreements. These derivatives may be used for risk management purposes, such as hedging the fund's currency exposure, or otherwise managing the risk profile of the fund. In addition, these derivative instruments may be used to enhance returns; in place of direct investments; or to obtain or adjust exposure to certain markets.

There are different types of US government securities, including those issued or guaranteed by the US government, its agencies and its instrumentalities, and they have different types of government support. Some are supported by the full faith and credit of the US, while others are supported by (1) the ability of the issuer to borrow from the US Treasury; (2) the credit of the issuing agency, instrumentality or government-sponsored entity; (3) pools of assets, such as mortgages; or (4) the US government in some other way.

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. Rogge Global Partners plc ("Rogge Global Partners") currently serves as the fund's investment advisor. Rogge Global Partners seeks to invest in bonds of financially healthy entities because it believes that these investments produce the highest bond and currency returns over time. In deciding which bonds to buy for the fund, Rogge Global Partners uses a top-down analysis to find value across countries and to forecast interest and currency-exchange rates over a one-year horizon in those countries, and an optimization model to help determine country, currency and duration positions for the fund. Rogge Global Partners generally sells securities (1) that no longer meet these selection criteria; (2) when it identifies more attractive investment opportunities; or (3) to adjust the average duration of the fund assets it manages. Rogge Global Partners may hedge the fund's exposure to foreign currencies to varying degrees as it deems appropriate.

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:

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.

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.

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.

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.

Prepayment risk: The fund's mortgage- and asset-backed securities may be prepaid more rapidly than expected, especially when interest rates are falling, and the fund may have to reinvest those prepayments at lower interest rates. When interest rates are rising, slower prepayments may extend the duration of the securities and may reduce their value.

Derivatives risk: The value of "derivatives"—so called because their value "derives" from the value of an underlying asset, reference rate or index—may rise or fall more rapidly than other investments. When using derivatives for non-hedging purposes, it is possible for the fund to lose more than the amount it invested in the derivative. When using derivatives for hedging purposes, the fund's overall returns may be reduced if the hedged investment experiences a favorable price movement. The risks of investing in derivative instruments also include market and management risks. Derivatives relating to fixed income markets are especially susceptible to interest rate risk and credit risk. In addition, many types of non-exchange traded derivatives may be subject to liquidity risk, counterparty risk, credit risk and mispricing or valuation complexity. These derivatives risks are different from, and may be greater than, the risks associated with investing directly in securities and other instruments.

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.

US Government securities risk: There are different types of US government securities with different levels of credit risk, including the risk of default, depending on the nature of the particular government support for that security. For example, a US government-sponsored entity, such as Federal National Mortgage Association ("Fannie Mae") or Federal Home Loan Mortgage Corporation ("Freddie Mac"), although chartered or sponsored by an Act of Congress, may issue securities that are neither insured nor guaranteed by the US Treasury and are therefore riskier than those that are.

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.

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.

High yield securities ("junk bonds") risk: Lower-rated securities (the issuers of which are typically in poor financial health) are subject to higher risks than investment grade securities. For example, lower-rated securities may be (1) subject to a greater risk of loss of principal and non-payment of interest (including default by the issuer); (2) subject to greater price volatility; and (3) less liquid than investment grade securities. The prices of such securities may be more vulnerable to bad economic news, or even the expectation of bad news, than higher rated fixed income securities.

Management risk: The risk that the investment strategies, techniques and risk analyses employed by the investment advisor may not produce the desired results.

Mortgage-related securities risk: Mortgage-related securities are subject to risks that are different from and/or more acute than risks associated with other types of debt instruments. Such risks may include prepayment risk, as discussed above. Conversely, in periods of rising interest rates, the fund may be subject to extension risk, and may receive principal later than expected, causing additional volatility. During periods of difficult or frozen credit markets, significant changes in interest rates, or deteriorating economic conditions, such securities may decline in value, face valuation difficulties, become more volatile and become illiquid. Certain types of mortgage-backed securities (e.g., CMOs and stripped mortgage-backed securities) can be even more volatile and may be more sensitive to the rate of prepayments than other mortgage-related securities. The risk of default for "sub-prime" mortgages is generally higher than other types of mortgage-backed securities. The structure of some of these securities may be complex, and there may be less available information than other types of debt securities.

Risk Lose Money [Text]

rr_RiskLoseMoney

You may lose money by investing in the fund.

Risk Nondiversified Status [Text]

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 [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 sales charges of the fund's Class C shares; 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 Barclays Global Aggregate ex USD 50% Hedged Index provides information regarding the effectiveness of the fund's currency hedging policy. 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 between October 10, 2000 and August 22, 2007, when Rogge Global Partners and another investment advisor each was responsible for managing a separate portion of the fund's assets. In addition, prior to December 1, 2005, the fund had been following a strategy of investing in both US and non-US fixed income investments, but effective as of that date, the fund modified its strategy to focus more on non-US fixed income investment opportunities. 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. After-tax returns for other classes will vary from the Class C shares' after-tax returns shown.

Performance Information Illustrates Variability of Returns [Text]

rr_PerformanceInformationIllustratesVariabilityOfReturns

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.

Performance Additional Market Index [Text]

rr_PerformanceAdditionalMarketIndex

The Barclays Global Aggregate ex USD 50% Hedged Index provides information regarding the effectiveness of the fund's currency hedging policy.

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 Fixed Income Investments Annual Total Returns of Class C Shares

Bar Chart Does Not Reflect Sales Loads [Text]

rr_BarChartDoesNotReflectSalesLoads

The bar chart does not reflect the sales charges of the fund's Class C shares; if it did, the total returns shown would be lower.

Bar Chart Closing [Text Block]

rr_BarChartClosingTextBlock

Best quarter during calendar years shown—3Q 2010: 11.26%
Worst quarter during calendar years shown—3Q 2008: (7.50)%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Best quarter during calendar years shown

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Sep. 30, 2010

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

11.26%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Worst quarter during calendar years shown

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Sep. 30, 2008

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(7.50%)

Index No Deduction for Fees, Expenses, Taxes [Text]

rr_IndexNoDeductionForFeesExpensesTaxes

(Indices reflect 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.

Performance Table One Class of after Tax Shown [Text]

rr_PerformanceTableOneClassOfAfterTaxShown

After-tax returns for other classes will vary from the Class C shares' after-tax returns shown.

Caption

rr_AverageAnnualReturnCaption

Average annual total returns (figures reflect sales charges) (for the periods ended December 31, 2013)

Barclays Global Aggregate ex US Index (Indices reflect no deduction for fees, expenses or taxes.)

Risk/Return:

rr_RiskReturnAbstract

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

(3.08%)

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

3.51%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

4.35%

Barclays Global Aggregate ex USD 50% Hedged Index (Indices reflects no deduction for fees, expenses or taxes.)

Risk/Return:

rr_RiskReturnAbstract

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

(0.94%)

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

3.76%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

4.41%

CLASS A

Risk/Return:

rr_RiskReturnAbstract

Maximum front-end sales charge (load) imposed on purchases (as a % of the offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

4.50%

Maximum deferred sales charge (load) (as a % of the lesser of the offering price or the redemption price)

rr_MaximumDeferredSalesChargeOverOther

none

Redemption Fee (as a percentage of Amount Redeemed)

rr_RedemptionFeeOverRedemption

(1.00%)

Exchange fee

rr_ExchangeFeeOverRedemption

none

Management fees

rr_ManagementFeesOverAssets

0.65%

Distribution and/or service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Other expenses (includes administration fee of 0.10%)

rr_OtherExpensesOverAssets

0.37%

Total annual fund operating expenses

rr_ExpensesOverAssets

1.27%

Fee Waiver or Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.05%)

^[1]

Total annual fund operating expenses after fee waiver and/or expense reimbursements

rr_NetExpensesOverAssets

1.22%

^[1]

Expense Breakpoint Discounts [Text]

rr_ExpenseBreakpointDiscounts

You may qualify for sales charge discounts on purchases of Class A shares if you or your family invest, or agree to invest in the future, at least $100,000 in the UBS family of funds.

Expense Breakpoint, Minimum Investment Required [Amount]

rr_ExpenseBreakpointMinimumInvestmentRequiredAmount

$ 100,000

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

569

^[2]

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

830

^[2]

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

1,111

^[2]

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,911

^[2]

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

(10.55%)

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

2.13%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

2.97%

Average Annual Returns, Inception Date

rr_AverageAnnualReturnInceptionDate

Dec. 11, 2000

CLASS C

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 lesser of the offering price or the redemption price)

rr_MaximumDeferredSalesChargeOverOther

0.75%

Redemption Fee (as a percentage of Amount Redeemed)

rr_RedemptionFeeOverRedemption

(1.00%)

Exchange fee

rr_ExchangeFeeOverRedemption

none

Management fees

rr_ManagementFeesOverAssets

0.65%

Distribution and/or service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

0.75%

Other expenses (includes administration fee of 0.10%)

rr_OtherExpensesOverAssets

0.35%

Total annual fund operating expenses

rr_ExpensesOverAssets

1.75%

Fee Waiver or Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.06%)

^[1]

Total annual fund operating expenses after fee waiver and/or expense reimbursements

rr_NetExpensesOverAssets

1.69%

^[1]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

247

^[2]

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

545

^[2]

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

943

^[2]

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

2,057

^[2]

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

172

^[2]

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

545

^[2]

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

943

^[2]

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

2,057

^[2]

Annual Return 2004

rr_AnnualReturn2004

9.23%

Annual Return 2005

rr_AnnualReturn2005

(6.67%)

Annual Return 2006

rr_AnnualReturn2006

4.78%

Annual Return 2007

rr_AnnualReturn2007

9.53%

Annual Return 2008

rr_AnnualReturn2008

0.52%

Annual Return 2009

rr_AnnualReturn2009

9.32%

Annual Return 2010

rr_AnnualReturn2010

4.51%

Annual Return 2011

rr_AnnualReturn2011

2.15%

Annual Return 2012

rr_AnnualReturn2012

4.47%

Annual Return 2013

rr_AnnualReturn2013

(6.72%)

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

(7.41%)

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

2.61%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

2.95%

Average Annual Returns, Inception Date

rr_AverageAnnualReturnInceptionDate

Dec. 01, 2000

CLASS C | After Taxes on Distributions

Risk/Return:

rr_RiskReturnAbstract

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

(7.76%)

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

1.35%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

1.47%

CLASS C | After Taxes on Distributions and Sale of Fund Shares

Risk/Return:

rr_RiskReturnAbstract

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

(4.19%)

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

1.59%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

1.77%

CLASS Y

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 lesser of the offering price or the redemption price)

rr_MaximumDeferredSalesChargeOverOther

none

Redemption Fee (as a percentage of Amount Redeemed)

rr_RedemptionFeeOverRedemption

(1.00%)

Exchange fee

rr_ExchangeFeeOverRedemption

none

Management fees

rr_ManagementFeesOverAssets

0.65%

Distribution and/or service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

none

Other expenses (includes administration fee of 0.10%)

rr_OtherExpensesOverAssets

0.44%

Total annual fund operating expenses

rr_ExpensesOverAssets

1.09%

Fee Waiver or Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.09%)

^[1]

Total annual fund operating expenses after fee waiver and/or expense reimbursements

rr_NetExpensesOverAssets

1.00%

^[1]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

102

^[2]

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

338

^[2]

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

592

^[2]

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 1,321

^[2]

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

(6.07%)

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

3.36%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

3.75%

Average Annual Returns, Inception Date

rr_AverageAnnualReturnInceptionDate

Jan. 16, 2001

[1] 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: (1) waive its management fees through March 31, 2015 to the extent necessary to reflect the lower sub-advisory fee paid by UBS Global AM to Rogge Global Partners plc, the fund's investment advisor; and (2) waive its management fees and/or reimburse expenses so that the fund's ordinary total operating expenses of each class through March 31, 2015 (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 1.25% for Class A, 1.75% for Class C and 1.00% for Class Y. The fund has agreed to repay UBS Global AM for any waived fees/reimbursed expenses (pursuant to item (2)) 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 these expense caps. 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.

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

XML

A, C, Y Prospectus | PACE® Intermediate Fixed Income Investments

PACE® Intermediate Fixed Income Investments

Investment objective

Current income, consistent with reasonable stability of principal.

Fees and expenses of the fund

These tables describe the fees and expenses that you may pay if you buy and hold shares of the fund. You may qualify for sales charge discounts on purchases of Class A shares if you or your family invest, or agree to invest in the future, at least $100,000 in the UBS family of funds. More information about these and other discounts and waivers, as well as eligibility requirements for each share class, is available from your financial advisor and in "Managing your fund account" on page 109 of the prospectus and in "Reduced sales charges, additional purchase, exchange and redemption information and other services" on page 208 of the fund's Statement of Additional Information.

Shareholder fees (fees paid directly from your investment)

Shareholder Fees A, C, Y Prospectus PACE® Intermediate Fixed Income Investments	Class A	Class C	Class Y
Maximum front-end sales charge (load) imposed on purchases (as a % of the offering price)	4.50%	none	none
Maximum deferred sales charge (load) (as a % of the lesser of the offering price or the redemption price)	none	0.75%	none
Exchange fee	none	none	none
Redemption fee (as a % of the amount redeemed within 90 days of purchase, if applicable)	1.00%	1.00%	1.00%

Annual fund operating expenses (expenses that you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses A, C, Y Prospectus PACE® Intermediate Fixed Income Investments		Class A	Class C	Class Y
Management fees		0.43%	0.43%	0.43%
Distribution and/or service (12b-1) fees		0.25%	0.75%	none
Other expenses (includes administration fee of 0.10%)		0.31%	0.31%	0.46%
Total annual fund operating expenses		0.99%	1.49%	0.89%
Management fee waiver/expense reimbursements	[1]	0.06%	0.06%	0.21%
Total annual fund operating expenses after fee waiver and/or expense reimbursements	[1]	0.93%	1.43%	0.68%

Example

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 unless otherwise stated. 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:

Expense Example A, C, Y Prospectus PACE® Intermediate Fixed Income Investments (USD $)		1 year	3 years	5 years	10 years
Class A	[1]	541	745	967	1,603
Class C	[1]	221	465	808	1,774
Class Y	[1]	69	263	472	1,077

Expense Example No Redemption (USD $)		1 year	3 years	5 years	10 years
A, C, Y Prospectus PACE® Intermediate Fixed Income Investments Class C	[1]	146	465	808	1,774

Portfolio turnover

The fund pays transaction costs, such as commissions or dealer spreads, 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 818% of the average value of its portfolio.

Principal strategies

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 fixed income securities. Such investments may include US government and foreign government bonds (including bonds issued by supranational and quasi-governmental entities and mortgage-backed securities) and corporate bonds (including mortgage- and asset-backed securities of private issuers, Eurodollar certificates of deposit, Eurodollar bonds and Yankee bonds). There are different types of US government securities, including those issued or guaranteed by the US government, its agencies and its instrumentalities, and they have different types of government support. Some are supported by the full faith and credit of the US, while others are supported by (1) the ability of the issuer to borrow from the US Treasury; (2) the credit of the issuing agency, instrumentality or government-sponsored entity; (3) pools of assets, such as mortgages; or (4) the US government in some other way.

The fund may invest in bonds that are investment grade at the time of purchase. The fund may also invest, in the aggregate, up to 20% of its total assets (measured at the time of purchase) in (1) bonds that are below investment grade at the time of purchase (or unrated bonds of equivalent quality) (commonly known as "junk bonds"), (2) non-US dollar denominated securities, and (3) fixed income securities of issuers located in emerging markets. The fund may also invest in preferred stocks.

The fund invests in bonds of varying maturities, but normally maintains a dollar-weighted average maturity of approximately three to ten years. It normally limits its overall portfolio "duration" to within +/- 50% of the duration of the Barclays US Intermediate Government/Credit Index, as calculated by the investment advisor, which as of December 31, 2013 was approximately 3.21 years. Duration is a measure of the fund's exposure to interest rate risk—a longer duration means that changes in market interest rates are likely to have a larger effect on the value of the fund's portfolio.

The fund may invest in "to be announced" or "TBA" securities, which are mortgage-backed securities that usually are traded on a forward commitment basis with an approximate principal amount and no defined maturity date, issued or guaranteed by US government agencies and instrumentalities. The fund also may engage in TBA and Treasury "roll" transactions. A TBA roll transaction is a strategy whereby the investment advisor decides to sell one TBA security and buy another TBA security due at a later date (Treasury roll transactions differ in that the underlying securities are US Treasury securities).

The fund may, but is not required to, use exchange-traded or over-the-counter derivative instruments for risk management purposes or to attempt to increase total returns. The derivatives in which the fund may invest include options (on swap agreements), futures (on securities or interest rate futures) and swap agreements (specifically, interest rate swaps). These derivatives may be used for risk management purposes, such as managing the risk profile of the fund. In addition, the derivative instruments listed above may be used to enhance returns or in place of direct investments. Futures, swaps and swaptions also be used to adjust the fund's portfolio duration.

The fund's investment strategies may result in high portfolio turnover.

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. BlackRock Financial Management, Inc. ("BlackRock") currently serves as the fund's investment advisor. BlackRock decides to buy specific bonds for the fund based on its credit analysis and review. BlackRock seeks to add value by controlling portfolio duration within a narrow band relative to the Barclays US Intermediate Government/Credit Index. BlackRock uses an analytical process that involves evaluating macroeconomics trends, technical market factors, yield curve exposure and market volatility.

Principal risks

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:

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.

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.

Prepayment risk: The fund's mortgage- and asset-backed securities may be prepaid more rapidly than expected, especially when interest rates are falling, and the fund may have to reinvest those prepayments at lower interest rates. When interest rates are rising, slower prepayments may extend the duration of the securities and may reduce their value.

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.

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 markets 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.

Derivatives risk: The value of "derivatives"—so called because their value "derives" from the value of an underlying asset, reference rate or index—may rise or fall more rapidly than other investments. When using derivatives for non-hedging purposes, it is possible for the fund to lose more than the amount it invested in the derivative. When using derivatives for hedging purposes, the fund's overall returns may be reduced if the hedged investment experiences a favorable price movement. The risks of investing in derivative instruments also include market and management risks. Derivatives relating to fixed income markets are especially susceptible to interest rate risk and credit risk. In addition, many types of swaps and other non-exchange traded derivatives may be subject to liquidity risk, counterparty risk, credit risk and mispricing or valuation complexity. These derivatives risks are different from, and may be greater than, the risks associated with investing directly in securities and other instruments.

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.

US Government securities risk: There are different types of US government securities with different levels of credit risk, including the risk of default, depending on the nature of the particular government support for that security. For example, a US government-sponsored entity, such as Federal National Mortgage Association ("Fannie Mae") or Federal Home Loan Mortgage Corporation ("Freddie Mac"), although chartered or sponsored by an Act of Congress, may issue securities that are neither insured nor guaranteed by the US Treasury and are therefore riskier than those that are.

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.

High yield securities ("junk bonds") risk: Lower-rated securities (the issuers of which are typically in poor financial health) are subject to higher risks than investment grade securities. For example, lower-rated securities may be (1) subject to a greater risk of loss of principal and non-payment of interest (including default by the issuer); (2) subject to greater price volatility; and (3) less liquid than investment grade securities. The prices of such securities may be more vulnerable to bad economic news, or even the expectation of bad news, than higher rated fixed income securities.

Swap agreement risk: The fund may enter into various types of swap agreements. Swap agreements can be less liquid and more difficult to value than other investments. Because its cash flows are based in part on changes in the value of the reference asset, a total return swap's market value will vary with changes in that reference asset. In addition, the fund may experience delays in payment or loss of income if the counterparty fails to perform under the contract.

Management risk: The risk that the investment strategies, techniques and risk analyses employed by the investment advisor may not produce the desired results.

Leverage risk associated with financial instruments: The use of financial instruments to increase potential returns may cause the fund to be more volatile than if it had not been leveraged. The use of leverage may also accelerate the velocity of losses and can result in losses to the fund that exceed the amount originally invested.

Mortgage-related securities risk: Mortgage-related securities are subject to risks that are different from and/or more acute than risks associated with other types of debt instruments. Such risks may include prepayment risk, as discussed above. Conversely, in periods of rising interest rates, the fund may be subject to extension risk, and may receive principal later than expected, causing additional volatility. During periods of difficult or frozen credit markets, significant changes in interest rates, or deteriorating economic conditions, such securities may decline in value, face valuation difficulties, become more volatile and become illiquid. Certain types of mortgage-backed securities (e.g., CMOs and stripped mortgage-backed securities) can be even more volatile and may be more sensitive to the rate of prepayments than other mortgage-related securities. The risk of default for "sub-prime" mortgages is generally higher than other types of mortgage-backed securities. The structure of some of these securities may be complex, and there may be less available information than other types of debt securities.

Performance

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 sales charges of the fund's class C shares; 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. 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. After-tax returns for other classes will vary from the Class C shares' after-tax returns shown.

PACE Intermediate Fixed Income Investments Annual Total Returns of Class C Shares

Best quarter during calendar years shown—3Q 2009: 3.63%
Worst quarter during calendar years shown—3Q 2008: (3.87)%

Average annual total returns (figures reflect sales charges) (for the periods ended December 31, 2013)

Average Annual Returns A, C, Y Prospectus PACE® Intermediate Fixed Income Investments	Average Annual Returns, 1 Year	Average Annual Returns, 5 Years	Average Annual Returns, 10 Years	Average Annual Returns, Inception Date
Class A	(5.63%)	3.23%	2.88%	Jan. 31, 2001
Class C	(2.38%)	3.68%	2.84%	Dec. 01, 2000
Class Y	(0.82%)	4.47%	3.63%	Feb. 02, 2001
After Taxes on Distributions Class C	(2.57%)	3.06%	1.99%
After Taxes on Distributions and Sale of Fund Shares Class C	(1.35%)	2.62%	1.88%
Barclays US Intermediate Government/Credit Index (Index reflects no deduction for fees, expenses or taxes.)	(0.86%)	3.96%	4.09%

[1] 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 of each class through March 31, 2015 (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 0.93% for Class A, 1.43% for Class C and 0.68% for Class Y. 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 these expense caps. 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.

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

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

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Class P Prospectus | PACE® Large Co Value Equity Investments | Class P

PACE® Large Co Value Equity Investments

Investment objective

Capital appreciation and dividend income.

Fees and expenses of the fund

These tables describe the fees and expenses that you may pay if you buy and hold shares of the fund.

Shareholder fees (fees paid directly from your investment)

Shareholder Fees	Class P Prospectus PACE® Large Co Value Equity Investments Class P
Maximum front-end sales charge (load) imposed on purchases (as a % of the offering price)	none
Maximum deferred sales charge (load) (as a % of the offering price)	none
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)	2.00%
Redemption fee (as a % of the amount redeemed within 90 days of purchase, if applicable)	1.00%

Annual fund operating expenses (expenses that you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses		Class P Prospectus PACE® Large Co Value Equity Investments Class P
Management fees		0.65%
Distribution and/or service (12b-1) fees		none
Other expenses		0.37%
Miscellaneous expenses (includes administration fee of 0.10%)		0.26%
Dividend expense, borrowing costs and related interest expense attributable to securities sold short	[1]	0.11%
Total annual fund operating expenses		1.02%

Example

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:

Expense Example (USD $)	1 year	3 years	5 years	10 years
Class P Prospectus PACE® Large Co Value Equity Investments Class P	305	933	1,587	3,337

Portfolio turnover

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 71% of the average value of its portfolio.

Principal strategies

Principal investments

The fund invests primarily in stocks of US companies that are believed to be undervalued. 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 issued by large capitalization companies. As of the date of this prospectus, large capitalization companies means companies with a total market capitalization of $3.0 billion or greater at the time of purchase. Effective April 28, 2014, large capitalization companies means companies with a total market capitalization within the market capitalization range of the companies in the Russell 1000^® Value Index at the time of purchase. The fund seeks income primarily from dividend paying stocks.

The fund may invest, to a lesser extent, in other securities, such as securities convertible into stocks, initial public offerings ("IPOs") and stocks of companies with smaller total market capitalizations. The fund may invest up to 20% of its total assets in non-US securities, which may trade either within or outside the US.

The fund is also permitted to engage in "short-selling." When selling short, 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 the security to the lender. The fund may also invest the proceeds received upon the initial sale of the security, resulting in leverage and increasing the fund's return and loss potential. Short selling provides opportunities to increase the fund's total returns, but also entails significant potential risks.

Management process

The fund employs a "manager of managers" structure. The fund's manager, UBS Global Asset Management (Americas) Inc. ("UBS Global AM"), 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. Institutional Capital LLC ("ICAP"), Pzena Investment Management, LLC ("Pzena"), Robeco Investment Management, Inc. ("Robeco") and Los Angeles Capital Management and Equity Research, Inc. ("Los Angeles Capital") 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.

ICAP's investment process involves the use of its proprietary valuation model to identify large capitalization companies that it believes offer the best relative values, and ICAP seeks to avoid companies that are exhibiting excessive deterioration in earnings trends. ICAP focuses on what it believes are the key investment variables (catalysts) that could potentially impact the security's market value. These catalysts are primarily company specific, such as a new product, restructuring or change in management, but occasionally the catalyst can be thematic (e.g., dependent on macroeconomic or industry trends). After a review of stock recommendations, ICAP's portfolio management team determines whether to add the stock to the portfolio or to monitor it for future purchase. ICAP continuously monitors each security and evaluates whether to eliminate it when its price target is achieved, the catalyst becomes inoperative or another stock offers a greater opportunity.

Pzena's strategy follows a disciplined investment process to implement its value philosophy, by focusing exclusively on companies that are underperforming their historically demonstrated earnings power. Pzena applies intensive fundamental research to these companies in an effort to determine whether such underperformance is temporary or permanent. Pzena looks for companies where: (1) the current valuation is low compared to the company's normalized earnings power; (2) current earnings are below historic norms; (3) the problems are temporary; (4) management has a viable strategy to generate earnings recovery; and (5) there is meaningful downside protection in case the earnings recovery does not materialize.

Robeco invests primarily in a diversified portfolio of common stocks of issuers identified as having attractive value characteristics with strong fundamentals. In selecting stocks, Robeco begins with a quantitative analysis that ranks the investment universe based on valuation, momentum and other fundamental factors. Then, Robeco applies fundamental analysis to those securities, considering factors such as price-to-book value and price-to-earnings ratios; high return on invested capital; and positive business momentum, as evidenced by improving trends, rising earnings and/or a catalyst for an improved business outlook. This process results in recommendations and price targets for the selected securities. Robeco constructs the portfolio based on these recommendations and applies certain risk controls, such as diversification among industries and sectors. Robeco establishes a sell discipline for each security in the portfolio based on its target price, and may also sell a security if business fundamentals weaken or if an expected catalyst fails to materialize. Robeco seeks to outperform the fund's benchmark in falling markets and to keep pace with the benchmark in rising markets, while protecting capital.

Los Angeles Capital employs a "long/short" or "130/30" equity strategy. Los Angeles Capital buys securities "long" that it believes will outperform the market or decrease portfolio risk, and sells securities "short" that it believes will underperform the market. When Los Angeles Capital sells a security short, it may invest the proceeds from that sale in additional securities. (For example, if Los Angeles Capital were responsible for $100 of fund assets, it may take traditional long positions in equity securities with the full $100, borrow and sell short $30 of equity securities, and also invest long the $30 received upon the initial short sale, resulting in long/short equity exposure, as percentages of its assets, of "130/30".) Los Angeles Capital uses a proprietary quantitative model that includes fundamental data inputs for a universe of equity securities and, through the use of statistical tools, estimates expected returns based on each security's risk characteristics and the expected return to each characteristic in the current market environment. Security weights, both long and short, are assigned through an integrated optimization process which identifies the portfolio with the highest expected return for an acceptable level of risk. Los Angeles Capital seeks to generate incremental investment returns above the fund's benchmark, while attempting to control investment risk relative to the benchmark. While Los Angeles Capital does not set price targets or valuation constraints, it will sell or short sell a security if it no longer has the desired risk characteristics, or if there are concerns about a particular company's merits. Los Angeles Capital closely monitors its short positions and borrowing costs.

Principal risks

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.

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.

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.

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.

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.

Leverage risk associated with financial instruments and practices: The use of certain financial instruments, including derivatives used for investment (non-hedging) purposes, and the engagement in certain practices, such as the investment of proceeds received in connection with short sales, to increase potential returns may cause the fund to be more volatile than if it had not been leveraged. The use of leverage may also accelerate the velocity of losses and can result in losses to the fund that exceed the amount originally invested.

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. The risks associated with short sales increase when the fund invests the proceeds received upon the initial sale of the security, because the fund can suffer losses on both the short position and the long position established with the short sale proceeds. 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.

Performance

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. ICAP assumed day-to-day management of a portion of the fund's assets on July 1, 2000. Pzena assumed day-to-day management of another portion of the fund's assets on May 27, 2008. Robeco assumed day-to-day management of a separate portion of the fund's assets on May 29, 2013. Los Angeles Capital assumed day-to-day management of a separate portion of the fund's assets on September 11, 2013. 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.

PACE Large Co Value Equity Investments Annual Total Returns of Class P Shares

Best quarter during calendar years shown—2Q 2009: 18.50%
Worst quarter during calendar years shown—4Q 2008: (22.58)%

Average annual total returns (figures reflect 2% PACE Select Advisors Program Fee) (for the periods ended December 31, 2013)

Average Annual Returns Class P Prospectus PACE® Large Co Value Equity Investments	Average Annual Returns, 1 Year	Average Annual Returns, 5 Years	Average Annual Returns, 10 Years	Average Annual Returns, Inception Date
Class P	32.49%	15.22%	5.58%	Aug. 24, 1995
Class P After Taxes on Distributions	31.78%	14.91%	4.83%
Class P After Taxes on Distributions and Sale of Fund Shares	18.95%	12.31%	4.53%
Class P Russell 1000 Value Index (Index reflects no deduction for fees, expenses or taxes.)	32.53%	16.67%	7.59%

[1] These "Dividend expense, borrowing costs and related interest expense attributable to securities sold short" are based on estimates and may vary based on actual investments.

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A, C, Y Prospectus | PACE® Large Co Growth Equity Investments

PACE® Large Co Growth Equity Investments

Investment objective

Capital appreciation.

Fees and expenses of the fund

These tables describe the fees and expenses that you may pay if you buy and hold shares of the fund. You may qualify for sales charge discounts on purchases of Class A shares if you or your family invest, or agree to invest in the future, at least $50,000 in the UBS family of funds. More information about these and other discounts and waivers, as well as eligibility requirements for each share class, is available from your financial advisor and in "Managing your fund account" on page 109 of the prospectus and in "Reduced sales charges, additional purchase, exchange and redemption information and other services" on page 208 of the fund's Statement of Additional Information.

Shareholder fees (fees paid directly from your investment)

Shareholder Fees A, C, Y Prospectus PACE® Large Co Growth Equity Investments	CLASS A	CLASS C	CLASS Y
Maximum front-end sales charge (load) imposed on purchases (as a % of the offering price)	5.50%	none	none
Maximum deferred sales charge (load) (as a % of the lesser of the offering price or the redemption price)	none	1.00%	none
Exchange fee	none	none	none
Redemption fee (as a % of the amount redeemed within 90 days of purchase, if applicable)	1.00%	1.00%	1.00%

Annual fund operating expenses (expenses that you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses A, C, Y Prospectus PACE® Large Co Growth Equity Investments	CLASS A	CLASS C		CLASS Y
Management fees	0.68%	0.68%		0.68%
Distribution and/or service (12b-1) fees	0.25%	1.00%		none
Other expenses (includes administration fee of 0.10%)	0.28%	0.37%	[1]	0.28%
Total annual fund operating expenses	1.21%	2.05%		0.96%

Example

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 unless otherwise stated. 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:

Expense Example A, C, Y Prospectus PACE® Large Co Growth Equity Investments (USD $)	1 year	3 years	5 years	10 years
CLASS A	667	913	1,178	1,935
CLASS C	308	641	1,099	2,370
CLASS Y	98	306	531	1,178

Expense Example No Redemption (USD $)	1 year	3 years	5 years	10 years
A, C, Y Prospectus PACE® Large Co Growth Equity Investments CLASS C	208	641	1,099	2,370

Portfolio turnover

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 76% of the average value of its portfolio.

Principal strategies

Principal investments

The fund invests primarily in stocks of companies that are believed to have substantial potential for capital growth. 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 issued by large capitalization companies. As of the date of this prospectus, large capitalization companies means companies with a total market capitalization of $3.0 billion or greater at the time of purchase. Effective April 28, 2014, large capitalization companies means companies with a total market capitalization within the market capitalization range of the companies in the Russell 1000^® Growth Index at the time of purchase. Dividend income is an incidental consideration in the investment advisors' selection of stocks for the fund.

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 healthcare or technology. The fund may also invest, to a lesser extent, in other securities such as securities convertible into stocks, fixed income securities, initial public offerings ("IPOs") and stocks of companies with smaller total market capitalizations. The fund may invest up to 20% of its total assets in non-US securities, which may trade either within or outside the US.

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. Delaware Investments Fund Advisers ("Delaware"), Roxbury Capital Management, LLC ("Roxbury") and J.P. Morgan Investment Management Inc. ("J.P. Morgan") 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.

Delaware invests primarily in common stocks of large capitalization growth-oriented companies that Delaware believes have long-term capital appreciation potential and are expected to grow faster than the US economy. It uses a bottom-up approach, seeking companies that have large-end market potential, dominant business models and strong free cash flow generation that are attractively priced compared to the intrinsic value of the securities. Delaware tends to hold a relatively focused portfolio with a limited number of stocks.

Roxbury's strategy employs a bottom-up approach to stock selection, seeking high quality growth companies whose stocks are trading at discounts to fair value. Roxbury looks for companies with sustainable competitive advantages and opportunities to grow and reinvest capital at higher rates than their cost of capital, as well as companies with management teams with a proven ability to maximize shareholder value. Roxbury evaluates companies as private entities to determine their intrinsic worth and uses scenario analysis to determine a "margin of safety," or discount to intrinsic value, as a means of protecting capital. Roxbury typically sells a stock if (1) the market price exceeds Roxbury's estimate of intrinsic value; (2) the company's fundamentals fall short of Roxbury's investment thesis; or (3) when there are more attractive investment alternatives. Roxbury may invest in a limited number of stocks that it believes have attractive risk-reward profiles, and this may also result in significant weights in a sector.

J.P. Morgan invests primarily in a focused portfolio of equity securities of large capitalization companies. Although J.P. Morgan will invest primarily in equity securities of U.S. companies, it may invest in foreign securities, including depositary receipts. In selecting investments, J.P. Morgan utilizes a combination of qualitative analysis and quantitative metrics in order to seek to achieve target returns which are higher than those of the fund's benchmark while attempting to maintain a moderate risk profile. J.P. Morgan employs a process that combines research, valuation and stock selection to identify companies that have a history of above-average growth or which it believes will achieve above-average growth in the future, and looks for companies with leading competitive positions, predictable and durable business models and management that can achieve sustained growth. J.P. Morgan may sell a security: due to a change in the company's fundamentals or a change in the original reason for purchase of an investment; if it no longer considers the security to be reasonably valued; or if it identifies a stock that it believes offers a better investment opportunity.

Principal risks

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.

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.

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.

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.

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.

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.

Performance

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 sales charges of the fund's Class C shares; 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. Delaware assumed responsibility for managing a separate portion of the fund's assets on December 5, 2007. Roxbury assumed responsibility for managing a separate portion of the fund's assets on May 25, 2010. J.P. Morgan assumed day-to-day management of a separate portion of the fund's assets on October 5, 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. After-tax returns for other classes will vary from the Class C shares' after-tax returns shown.

PACE Large Co Growth Equity Invesments Annual Total Returns of Class C Shares

Best quarter during calendar years shown—1Q 2012: 16.07%
Worst quarter during calendar years shown—4Q 2008: (21.54)%

Average Annual Returns A, C, Y Prospectus PACE® Large Co Growth Equity Investments	Average Annual Returns, 1 Year	Average Annual Returns, 5 Years	Average Annual Returns, 10 Years	Average Annual Returns, Inception Date
CLASS A	27.38%	17.36%	6.45%	Nov. 27, 2000
CLASS C	32.71%	17.73%	6.16%	Nov. 27, 2000
CLASS Y	35.21%	19.05%	7.42%	Feb. 15, 2001
After Taxes on Distributions CLASS C	29.70%	17.19%	5.87%
After Taxes on Distributions and Sale of Fund Shares CLASS C	20.75%	14.39%	4.96%
Russell 1000 Growth Index (Index reflects no deduction for fees, expenses or taxes.)	33.48%	20.39%	7.83%

[1] Includes recoupment of 0.01% from the fund's Class C shares expenses previously reimbursed by UBS Global Asset Management (Americas) Inc. ("UBS Global AM") under a written fee waiver/expense reimbursement agreement.

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A, C, Y Prospectus | PACE® International Equity Investments

PACE® International Equity Investments

Investment objective

Capital appreciation.

Fees and expenses of the fund

These tables describe the fees and expenses that you may pay if you buy and hold shares of the fund. You may qualify for sales charge discounts on purchases of Class A shares if you or your family invest, or agree to invest in the future, at least $50,000 in the UBS family of funds. More information about these and other discounts and waivers, as well as eligibility requirements for each share class, is available from your financial advisor and in "Managing your fund account" on page 109 of the prospectus and in "Reduced sales charges, additional purchase, exchange and redemption information and other services" on page 208 of the fund's Statement of Additional Information.

Shareholder fees (fees paid directly from your investment)

Shareholder Fees A, C, Y Prospectus PACE® International Equity Investments	CLASS A	CLASS C	CLASS Y
Maximum front-end sales charge (load) imposed on purchases (as a % of the offering price)	5.50%	none	none
Maximum deferred sales charge (load) (as a % of the lesser of the offering price or the redemption price)	none	1.00%	none
Exchange fee	none	none	none
Redemption fee (as a % of the amount redeemed within 90 days of purchase, if applicable)	1.00%	1.00%	1.00%

Annual fund operating expenses (expenses that you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses A, C, Y Prospectus PACE® International Equity Investments		CLASS A	CLASS C	CLASS Y
Management fees		0.79%	0.79%	0.79%
Distribution and/or service (12b-1) fees		0.25%	1.00%	none
Other expenses		0.79%	0.88%	0.78%
Miscellaneous expenses (includes administration fee of 0.10%)		0.38%	0.47%	0.37%
Dividend expense, borrowing costs and related interest expense attributable to securities sold short	[1]	0.41%	0.41%	0.41%
Total annual fund operating expenses		1.83%	2.67%	1.57%

Example

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 unless otherwise stated. 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:

Expense Example A, C, Y Prospectus PACE® International Equity Investments (USD $)	1 year	3 years	5 years	10 years
CLASS A	726	1,094	1,486	2,580
CLASS C	370	829	1,415	3,003
CLASS Y	160	496	855	1,867

Expense Example No Redemption (USD $)	1 year	3 years	5 years	10 years
A, C, Y Prospectus PACE® International Equity Investments CLASS C	270	829	1,415	3,003

Portfolio turnover

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 36% of the average value of its portfolio.

Principal strategies

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. The fund invests primarily in stocks of companies that are domiciled in developed foreign countries and principally traded in Japanese, European, Pacific and Australian securities markets or traded in US securities markets. Such investments may include common stocks, which may or may not pay dividends, and securities convertible into common stocks, of companies domiciled outside the US.

The fund may invest, to a limited extent, in (1) stocks of companies in emerging markets, including Asia, Latin America and other regions where markets may not yet fully reflect the potential of the developing economy, and (2) securities of other investment companies that invest in foreign markets and securities convertible into stocks, including convertible bonds that are below investment grade. The fund may, but is not required to, use exchange-traded or over-the-counter derivative instruments for risk management purposes or to attempt to increase total returns. The derivatives in which the fund may invest include currency forward agreements. These derivatives may be used for risk management purposes, such as hedging the fund's currency exposure. In addition, these derivative instruments may be used to obtain or adjust exposure to certain markets.

The fund is also permitted to engage in "short-selling." When selling short, 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 the security to the lender. The fund may also invest the proceeds received upon the initial sale of the security, resulting in leverage and increasing the fund's return and loss potential. Short selling provides opportunities to increase the fund's total returns, but also entails significant potential risks.

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"), Los Angeles Capital Management and Equity Research, Inc. ("Los Angeles Capital") and Chautauqua Capital Management, LLC ("Chautauqua") 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.

Los Angeles Capital employs a "long/short" or "130/30" equity strategy. Los Angeles Capital buys securities "long" that it believes will outperform the market or decrease portfolio risk, and sells securities "short" that it believes will underperform the market. When Los Angeles Capital sells a security short, it may invest the proceeds from that sale in additional securities. (For example, if Los Angeles Capital were responsible for $100 of fund assets, it may take traditional long positions in equity securities with the full $100, borrow and sell short $30 of equity securities, and also invest long the $30 received upon the initial short sale, resulting in long/short equity exposure, as percentages of its assets, of "130/30".) Los Angeles Capital uses a proprietary quantitative model that includes fundamental data inputs for a universe of global equity securities and, through the use of statistical tools, estimates expected returns based on each security's risk characteristics and the expected return to each characteristic in the current market environment. Security weights, both long and short, are assigned through an integrated optimization process which identifies the portfolio with the highest expected return for an acceptable level of risk. Los Angeles Capital also employs monitoring tools and certain additional constraints to ensure compliance with global short sale regulations. Los Angeles Capital seeks to generate incremental investment returns above the fund's benchmark, while attempting to control investment risk relative to the benchmark. While Los Angeles Capital does not set price targets or valuation constraints, it will sell or short sell a security if it no longer has the desired risk characteristics, or if there are concerns about a particular company's merits. Los Angeles Capital closely monitors its short positions and borrowing costs.

Chautauqua endeavors to achieve consistent risk adjusted excess returns by managing a concentrated portfolio of 25-35 quality, growth companies generally headquartered outside of the United States. The portfolio consists of a carefully diversified set of best idea equities that Chautauqua believes will benefit from long-term trends, have sustainable competitive advantages and exhibit growth that should outpace the market. Companies are valued based on a forward looking cash flow analysis. When selecting investments, Chautauqua has a long-term time horizon.

Principal risks

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.

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 declines against the US dollar, the value of the holding decreases 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.

Derivatives risk: The value of "derivatives"—so called because their value "derives" from the value of an underlying asset, reference rate or index—may rise or fall more rapidly than other investments. When using derivatives for non-hedging purposes, it is possible for the fund to lose more than the amount it invested in the derivative. When using derivatives for hedging purposes, the fund's overall returns may be reduced if the hedged investment experiences a favorable price movement. The risks of investing in derivative instruments also include market and management risks. In addition, many types of non-exchange traded derivatives may be subject to liquidity risk, counterparty risk, credit risk and mispricing or valuation complexity. These derivatives risks are different from, and may be greater than, the risks associated with investing directly in securities and other instruments.

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.

Leverage risk associated with financial instruments and practices: The use of financial instruments, including derivatives used for investment (non-hedging) purposes, and the engagement in certain practices, such as the investment of proceeds received in short sales, to increase potential returns may cause the fund to be more volatile than if it had not been leveraged. The use of leverage may also accelerate the velocity of losses and can result in losses to the fund that exceed the amount originally invested.

Short sales risk: There are certain unique risks associated with the use of short sales strategies. When selling a security short, the 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.

Management risk: The risk that the investment strategies, techniques and risk analyses employed by an investment advisor may not produce the desired results.

Performance

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 sales charges of the fund's Class C shares; 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 April 1, 2004. Chautauqua assumed day-to-day management of a separate portion of the fund's assets on August 5, 2013. Los Angeles Capital assumed day-to-day management of another portion of the fund's assets on September 13, 2013. 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. After-tax returns for other classes will vary from the Class C shares' after-tax returns shown.

PACE International Equity Investments Annual Total Returns of Class C Shares

Best quarter during calendar years shown—2Q 2009: 22.47%
Worst quarter during calendar years shown—4Q 2008: (20.26)%

Average annual total returns (figures reflect sales charges) (for the periods ended December 31, 2013)

Average Annual Returns A, C, Y Prospectus PACE® International Equity Investments	Average Annual Returns, 1 Year	Average Annual Returns, 5 Years	Average Annual Returns, 10 Years	Average Annual Returns, Inception Date
CLASS A	12.93%	9.16%	5.16%	Nov. 27, 2000
CLASS C	17.58%	9.47%	4.88%	Nov. 27, 2000
CLASS Y	19.91%	10.72%	6.13%	Jan. 17, 2001
After Taxes on Distributions CLASS C	17.38%	9.30%	4.43%
After Taxes on Distributions and Sale of Fund Shares CLASS C	10.27%	7.62%	4.22%
MSCI EAFE Index (net) (Index reflects no deduction for fees, expenses or taxes.)	22.78%	12.44%	6.91%

[1] These "Dividend expense, borrowing costs and related interest expense attributable to securities sold short" are based on estimates and may vary based on actual investments.

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A, C, Y Prospectus | PACE® Alternative Strategies Investments

PACE® Alternative Strategies Investments

Investment objective

Long-term capital appreciation.

Fees and expenses of the fund

These tables describe the fees and expenses that you may pay if you buy and hold shares of the fund. You may qualify for sales charge discounts on purchases of Class A shares if you or your family invest, or agree to invest in the future, at least $50,000 in the UBS family of funds. More information about these and other discounts and waivers, as well as eligibility requirements for each share class, is available from your financial advisor and in "Managing your fund account" on page 109 of the prospectus and in "Reduced sales charges, additional purchase, exchange and redemption information and other services" on page 208 of the fund's Statement of Additional Information.

Shareholder fees (fees paid directly from your investment)

Shareholder Fees A, C, Y Prospectus PACE® Alternative Strategies Investments	Class A	Class C	Class Y
Maximum front-end sales charge (load) imposed on purchases (as a % of the offering price)	5.50%	none	none
Maximum deferred sales charge (load) (as a % of the lesser of the offering price or the redemption price)	none	1.00%	none
Exchange fee	none	none	none
Redemption fee (as a % of the amount redeemed within 90 days of purchase, if applicable)	1.00%	1.00%	1.00%

Annual fund operating expenses (expenses that you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses A, C, Y Prospectus PACE® Alternative Strategies Investments		Class A	Class C	Class Y
Management fees		1.30%	1.30%	1.30%
Distribution and/or service (12b-1) fees		0.25%	1.00%	none
Other expenses		0.46%	0.42%	0.47%
Miscellaneous expenses (includes administration fee of 0.10%)		0.38%	0.34%	0.39%
Dividend expense, borrowing costs and related interest expense attributable to securities sold short		0.08%	0.08%	0.08%
Acquired fund fees and expenses	[1]	0.16%	0.16%	0.16%
Total annual fund operating expenses		2.17%	2.88%	1.93%
Management fee waiver/expense reimbursements	[2]	0.10%	0.10%	0.10%
Total annual fund operating expenses after fee waiver and/or expense reimbursements	[2]	2.07%	2.78%	1.83%

Example

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 unless otherwise stated. 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:

Expense Example A, C, Y Prospectus PACE® Alternative Strategies Investments (USD $)		1 year	3 years	5 years	10 years
Class A	[1]	748	1,183	1,642	2,908
Class C	[1]	381	882	1,510	3,197
Class Y	[1]	186	596	1,033	2,246

Expense Example No Redemption (USD $)		1 year	3 years	5 years	10 years
A, C, Y Prospectus PACE® Alternative Strategies Investments Class C	[1]	281	882	1,510	3,197

Portfolio turnover

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 140% of the average value of its portfolio.

Principal strategies

Principal investments

The fund has a broad investment mandate that permits it to use an extensive range of investment strategies and to invest in a wide spectrum of equity, fixed income and derivative securities in pursuing its investment objective. The fund seeks to provide investors a well diversified portfolio intended to provide participation in growing markets over a full market cycle while limiting large losses in more volatile and declining markets. The fund may pursue its investment objective by implementing a broad and diversified array of liquid alternative strategies, including, but not limited to, strategies that are not currently employed by the fund.

The fund invests in equity securities of US and non-US companies of various market capitalizations. The fund also invests in fixed income securities, which are not subject to any credit rating or maturity limitations, issued by companies and government and supranational entities around the world. The fund may invest in emerging as well as developed markets and may invest a significant portion of its assets in the securities of companies in particular economic sectors. The fund may also invest in the securities of other investment companies, including exchange-traded funds ("ETFs").

The fund may, but is not required to, invest extensively in exchange-traded or over-the-counter derivative instruments for risk management purposes or to attempt to increase total returns. The derivatives in which the fund may invest include options (on indices), futures (on indices), currency forward agreements and swap agreements (specifically, interest rate swaps). These derivatives may be used for risk management purposes, such as hedging the fund's security, index, currency, interest rate or other exposure, or otherwise managing the risk profile of the fund. In addition, the derivative instruments listed above may be used to enhance returns; in place of direct investments; to obtain or adjust exposure to certain markets; or to establish net short positions in markets, currencies or securities. Futures on indices and interest rate swaps may also be used to adjust the fund's portfolio duration, or to achieve a negative portfolio duration.

The fund is also permitted to engage in "short-selling." When selling short, 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 the security to the lender. Short selling provides opportunities to increase the fund's total returns, but also entails significant potential risks.

The fund's investment strategies may result in high portfolio turnover.

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, currently serves as one of the fund's investment advisors (i.e., it allocates a portion of the fund's assets to other unaffiliated pooled investment vehicles and index futures) and has the ultimate authority, subject to oversight by the fund's board, to oversee the fund's other investment advisor(s) and recommend their hiring, termination and replacement. In addition to UBS Global AM, Analytic Investors, LLC ("Analytic Investors"), First Quadrant L.P. ("First Quadrant") and Standard Life Investments (Corporate Funds) Limited ("Standard Life Investments") currently serve as the fund's other investment advisors. The allocation of the fund's assets between investment advisors is designed to achieve long-term capital appreciation while having a low correlation to traditional equity and fixed income asset classes. Subject to approval by the fund's board of trustees, UBS Global AM may in the future allocate assets to additional or different investment advisors to employ other portfolio management strategies, and changes to current strategies may be made.

Analytic Investors employs a long/short global equity strategy. This strategy is implemented by taking long and short positions of equity securities publicly traded in the US and in foreign markets by direct equity investment (and may also be implemented through the use of derivatives). The fund buys securities "long" that Analytic Investors believes will out-perform the market, and sells securities "short" that Analytic believes will under-perform the market. This is, however, not a market neutral strategy. The fund's long-short exposure will vary over time based on Analytic Investors' assessment of market conditions and other factors.

First Quadrant employs a "global macro strategy." This strategy is implemented by combining several different complex investment techniques. First Quadrant uses a "tactical risk allocation" approach across global markets which increases investment risk where it believes opportunities for risk-adjusted profit are high and attempts to lower market risks when it believes gains have been realized and future gains are less likely. First Quadrant also assesses the combination of local market and economic factors as well as global equity, fixed income or currency market factors and attempts to capture inefficiencies in those markets. First Quadrant's strategy is primarily implemented through the use of derivatives, and First Quadrant seldom holds securities "long." It uses exchange traded futures on global equity indices and government bonds, forwards, swaps and exchange traded options such as options on indices. By using derivatives, First Quadrant intends to quickly and efficiently gain market exposure to equity securities, fixed income securities, foreign currencies, and options and seeks to take advantage of value (and to reduce exposure to certain risks) that it identifies in these global markets. The fund also may hold cash or invest its cash balances at such times and in any permissible investments deemed appropriate by First Quadrant.

First Quadrant presently manages two separate portions of the fund's assets, using the strategies and investments described above. With respect to the first portion, First Quadrant seeks positive absolute returns from its global macro strategy, and the returns of this portion are not expected to be closely correlated with those of global equity markets. With respect to the second portion, First Quadrant combines its global macro strategy with passive exposure to global equity markets while targeting a specific level of active risk, which is expected to result in returns more closely correlated with those of global equity markets.

Standard Life Investments employs a "global multi-asset strategy" and seeks to achieve a total return by delivering a diversified global portfolio that makes use of multiple strategies across various asset classes. It aims to exploit market cyclicality and a diverse array of inefficiencies across and within global markets to maximize risk adjusted absolute return, by investing in listed equity, equity-related and debt securities, including exchange traded funds, and derivatives or other instruments, both for investment and hedging purposes. The fund may take long and/or short positions, and its derivative investments (which may be used routinely) may include futures, options, swaps, and forward currency contracts.

Standard Life Investments manages its strategies dynamically over time, and will actively modify investment strategies and develop new strategies in response to additional research, changing market conditions, or other factors. Its strategies seek to deliver returns commensurate with reasonable levels of risk and tangible diversification benefits, while having both sufficient liquidity and capacity to benefit the fund in a significant way. Standard Life Investments may also hold cash or invest its cash balances in cash equivalents and short-term investments, in order to cover the derivative transactions or otherwise in its discretion.

UBS Global AM allocates a portion of the fund's assets primarily to unaffiliated actively- and passively-managed pooled investment vehicles, including ETFs, that it believes are suitable for return generation, risk management (e.g., increased portfolio diversification), or both. In addition, UBS Global AM may invest in index futures primarily for cash management (i.e., to obtain certain market exposures in the fund and reduce cash holdings) and risk management purposes. UBS Global AM generally invests in other unaffiliated pooled investment vehicles and index futures that have risk and return objectives that are deemed to be complementary to the other investments and strategies within the fund overall.

Principal risks

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:

Aggressive investment risk: The fund may employ investment strategies that involve greater risks than the strategies used by typical mutual funds, including increased use of short sales (which involve the risk of an unlimited increase in the market value of the security sold short, which could result in a theoretically unlimited loss), leverage and derivative transactions, and hedging strategies.

Arbitrage trading risk: The underlying relationships between securities in which the fund takes arbitrage investment positions may change in an adverse manner, causing the fund to realize losses.

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.

Derivatives risk: The value of "derivatives"—so called because their value "derives" from the value of an underlying asset, reference rate or index—may rise or fall more rapidly than other investments. When using derivatives for non-hedging purposes, it is possible for the fund to lose more than the amount it invested in the derivative. When using derivatives for hedging purposes, the fund's overall returns may be reduced if the hedged investment experiences a favorable price movement. The risks of investing in derivative instruments also include market and management risks. Derivatives relating to fixed income markets are especially susceptible to interest rate risk and credit risk. In addition, many types of swaps and other non-exchange traded derivatives may be subject to liquidity risk, counterparty risk, credit risk and mispricing or valuation complexity. These derivatives risks are different from, and may be greater than, the risks associated with investing directly in securities and other instruments.

Swap agreement risk: The fund may enter into various types of swap agreements. Swap agreements can be less liquid and more difficult to value than other investments. Because its cash flows are based in part on changes in the value of the reference asset, a total return swap's market value will vary with changes in that reference asset. In addition, the fund may experience delays in payment or loss of income if the counterparty fails to perform under the contract.

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 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 declines against the US dollar, the value of the holding decreases 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.

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.

High yield securities ("junk bonds") risk: Lower-rated securities (the issuers of which are typically in poor financial health) are subject to higher risks than investment grade securities. For example, lower-rated securities may be (1) subject to a greater risk of loss of principal and non-payment of interest (including default by the issuer); (2) subject to greater price volatility; and (3) less liquid than investment grade securities. The prices of such securities may be more vulnerable to bad economic news, or even the expectation of bad news, than higher rated fixed income securities.

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.

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.

Leverage risk associated with financial instruments: The use of financial instruments to increase potential returns, including derivatives used for investment (non-hedging) purposes, may cause the fund to be more volatile than if it had not been leveraged. The use of leverage may also accelerate the velocity of losses and can result in losses to the fund that exceed the amount originally invested.

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.

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.

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.

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.

Structured security risk: The fund may purchase securities representing interests in underlying assets, but structured to provide certain advantages not inherent in those assets (e.g., enhanced liquidity and yields linked to short-term interest rates). If those securities behaved in a way that the fund's investment advisors did not anticipate, or if the security structures encountered unexpected difficulties, the fund could suffer a loss.

Valuation risk: During periods of reduced market liquidity or in the absence of readily available market quotations for securities, the ability of the fund to value the fund's securities becomes more difficult and the judgment of the fund's manager and investment advisors may play a greater role in the valuation of the securities due to reduced availability of reliable objective pricing data.

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.

Management risk: The risk that the investment strategies, techniques and risk analyses employed by an investment advisor may not produce the desired results.

Investment company risk: Investments in open- or closed-end investment companies, including exchange-traded funds, 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.

Performance

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 sales charges of the fund's Class C shares; 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 Barclays Global Aggregate Index shows how the fund's performance compares to the broad global markets for US and non-US corporate, government, governmental agency, supranational, mortgage-backed and asset-backed fixed income securities. The MSCI World Free Index (net) shows how the fund is performing against a diversified global equity index (an asset class in which the fund invests). The HFRI Fund of Funds Composite Index shows how the fund is performing against a broad measure of hedge fund returns. Life of class performance for the indices is as of the inception month-end of each class. The fund's past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future. Analytic Investors has been responsible for the day-to-day management of a separate portion of the fund's assets since inception of the fund. First Quadrant assumed day-to-day management of a separate portion of the fund's assets on April 8, 2009. Standard Life Investments assumed day-to-day management of a separate portion of the fund's assets on August 5, 2010. UBS Global AM assumed day-to-day management of a separate portion of the fund's assets (i.e., investing in other unaffiliated pooled investment vehicles and index futures) on March 31, 2014. Prior to that, other investment advisors have managed portions of 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. After-tax returns for other classes will vary from the Class C shares' after-tax returns shown.

PACE Alternative Strategies Investments Annual Total Returns of Class C Shares (2007 was Class C's first full calendar year of operations)

Best quarter during calendar years shown—2Q 2009: 7.27%
Worst quarter during calendar years shown—3Q 2008: (12.12)%

Average annual total returns (figures reflect sales charges) (for the periods ended December 31, 2013)

Average Annual Returns A, C, Y Prospectus PACE® Alternative Strategies Investments	Average Annual Returns, 1 Year	Average Annual Returns, 5 Years	Average Annual Returns, Life of Class		Average Annual Returns, Inception Date
Class A	3.49%	4.36%	0.77%		Apr. 10, 2006
Class C	7.69%	4.79%	0.83%		Apr. 11, 2006
Class Y	9.86%	5.79%	1.01%		Jul. 23, 2008
After Taxes on Distributions Class C	7.20%	4.68%	0.65%
After Taxes on Distributions and Sale of Fund Shares Class C	4.42%	3.69%	0.59%
Citigroup Three-Month US Treasury Bill Index (Index reflects no deduction for fees, expenses or taxes.)	0.05%	0.10%		[1]
Barclays Global Aggregate Index (Index reflects no deduction for fees, expenses or taxes.)	(2.60%)	3.91%		[2]
MSCI World Free Index (net) (Index reflects no deduction for fees and expenses.)	26.68%	15.02%		[3]
HFRI Fund of Funds Composite Index (Index reflects no deduction for fees, expenses or taxes.)	8.74%	4.83%		[4]

[1] These "Acquired fund fees and expenses" are based on estimated amounts for the current fiscal year. Since the "Acquired fund fees and expenses" are not directly borne by the fund, they are not reflected in the fund's financial statements, and therefore the amounts listed in "Total annual fund operating expenses" and "Total annual fund operating expenses after fee waiver and/or expense reimbursements" will differ from those presented in the Financial highlights.

[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 through March 31, 2015 to the extent necessary to offset the cost savings to UBS Global AM for allocating a portion of the fund's assets to other unaffiliated pooled investment vehicles and index futures. 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.

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

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

[1] Average annual total returns for the Citigroup Three-Month US Treasury Bill Index for the life of each class were as follows: Class A-1.33%; Class C-1.33%; Class Y-0.19%.

[2] Average annual total returns for the Barclays Global Aggregate Index for the life of each class were as follows: Class A-5.02%; Class C-5.02%; Class Y-3.81%.

[3] Average annual total returns for the MSCI World Free Index (net) for the life of each class were as follows: Class A-4.71%; Class C-4.71%; Class Y-5.96%.

[4] Average annual total returns for the HFRI Fund of Funds Composite Index for the life of each class were as follows: Class A-1.65%;Class C-1.65%; Class Y-0.86%.

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Class P Prospectus | PACE® International Equity Investments | Class P

PACE® International Equity Investments

Investment objective

Capital appreciation.

Fees and expenses of the fund

These tables describe the fees and expenses that you may pay if you buy and hold shares of the fund.

Shareholder fees (fees paid directly from your investment)

Shareholder Fees	Class P Prospectus PACE® International Equity Investments Class P
Maximum front-end sales charge (load) imposed on purchases (as a % of the offering price)	none
Maximum deferred sales charge (load) (as a % of the offering price)	none
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)	2.00%
Redemption fee (as a % of the amount redeemed within 90 days of purchase, if applicable)	1.00%

Annual fund operating expenses (expenses that you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses		Class P Prospectus PACE® International Equity Investments Class P
Management fees		0.79%
Distribution and/or service (12b-1) fees		none
Other expenses		0.79%
Miscellaneous expenses (includes administration fee of 0.10%)		0.38%
Dividend expense, borrowing costs and related interest expense attributable to securities sold short	[1]	0.41%
Total annual fund operating expenses		1.58%

Example

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:

Expense Example (USD $)	1 year	3 years	5 years	10 years
Class P Prospectus PACE® International Equity Investments Class P	361	1,097	1,855	3,845

Portfolio turnover

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 36% of the average value of its portfolio.

Principal strategies

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. The fund invests primarily in stocks of companies that are domiciled in developed foreign countries and principally traded in Japanese, European, Pacific and Australian securities markets or traded in US securities markets. Such investments may include common stocks, which may or may not pay dividends, and securities convertible into common stocks, of companies domiciled outside the US.

The fund may invest, to a limited extent, in (1) stocks of companies in emerging markets, including Asia, Latin America and other regions where markets may not yet fully reflect the potential of the developing economy, and (2) securities of other investment companies that invest in foreign markets and securities convertible into stocks, including convertible bonds that are below investment grade. The fund may, but is not required to, use exchange-traded or over-the-counter derivative instruments for risk management purposes or to attempt to increase total returns. The derivatives in which the fund may invest include currency forward agreements. These derivatives may be used for risk management purposes, such as hedging the fund's currency exposure. In addition, these derivative instruments may be used to obtain or adjust exposure to certain markets.

The fund is also permitted to engage in "short-selling." When selling short, 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 the security to the lender. The fund may also invest the proceeds received upon the initial sale of the security, resulting in leverage and increasing the fund's return and loss potential. Short selling provides opportunities to increase the fund's total returns, but also entails significant potential risks.

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"), Los Angeles Capital Management and Equity Research, Inc. ("Los Angeles Capital") and Chautauqua Capital Management, LLC ("Chautauqua") 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.

Los Angeles Capital employs a "long/short" or "130/30" equity strategy. Los Angeles Capital buys securities "long" that it believes will outperform the market or decrease portfolio risk, and sells securities "short" that it believes will underperform the market.

When Los Angeles Capital sells a security short, it may invest the proceeds from that sale in additional securities. (For example, if Los Angeles Capital were responsible for $100 of fund assets, it may take traditional long positions in equity securities with the full $100, borrow and sell short $30 of equity securities, and also invest long the $30 received upon the initial short sale, resulting in long/short equity exposure, as percentages of its assets, of "130/30".) Los Angeles Capital uses a proprietary quantitative model that includes fundamental data inputs for a universe of global equity securities and, through the use of statistical tools, estimates expected returns based on each security's risk characteristics and the expected return to each characteristic in the current market environment. Security weights, both long and short, are assigned through an integrated optimization process which identifies the portfolio with the highest expected return for an acceptable level of risk. Los Angeles Capital also employs monitoring tools and certain additional constraints to ensure compliance with global short sale regulations. Los Angeles Capital seeks to generate incremental investment returns above the fund's benchmark, while attempting to control investment risk relative to the benchmark. While Los Angeles Capital does not set price targets or valuation constraints, it will sell or short sell a security if it no longer has the desired risk characteristics, or if there are concerns about a particular company's merits. Los Angeles Capital closely monitors its short positions and borrowing costs.

Chautauqua endeavors to achieve consistent risk adjusted excess returns by managing a concentrated portfolio of 25-35 quality, growth companies generally headquartered outside of the United States. The portfolio consists of a carefully diversified set of best idea equities that Chautauqua believes will benefit from long-term trends, have sustainable competitive advantages and exhibit growth that should outpace the market. Companies are valued based on a forward looking cash flow analysis. When selecting investments, Chautauqua has a long-term time horizon.

Principal risks

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.

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 declines against the US dollar, the value of the holding decreases 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.

Derivatives risk: The value of "derivatives"—so called because their value "derives" from the value of an underlying asset, reference rate or index—may rise or fall more rapidly than other investments. When using derivatives for non-hedging purposes, it is possible for the fund to lose more than the amount it invested in the derivative. When using derivatives for hedging purposes, the fund's overall returns may be reduced if the hedged investment experiences a favorable price movement. The risks of investing in derivative instruments also include market and management risks. In addition, many types of non-exchange traded derivatives may be subject to liquidity risk, counterparty risk, credit risk and mispricing or valuation complexity. These derivatives risks are different from, and may be greater than, the risks associated with investing directly in securities and other instruments.

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.

Management risk: The risk that the investment strategies, techniques and risk analyses employed by an investment advisor may not produce the desired results.

Leverage risk associated with financial instruments and practices: The use of financial instruments, including derivatives used for investment (non-hedging) purposes, and the engagement in certain practices, such as the investment of proceeds received in short sales, to increase potential returns may cause the fund to be more volatile than if it had not been leveraged. The use of leverage may also accelerate the velocity of losses and can result in losses to the fund that exceed the amount originally invested.

Short sales risk: There are certain unique risks associated with the use of short sales strategies. When selling a security short, the 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 securi- ties sold short increases, thereby increasing the potential for loss.

Performance

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 April 1, 2004. Chautauqua assumed day-to-day management of a separate portion of the fund's assets on August 5, 2013. Los Angeles Capital assumed day-to-day management of another portion of the fund's assets on September 13, 2013. 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.

PACE International Equity Investments Annual Total Returns of Class P Shares

Best quarter during calendar years shown—2Q 2009: 22.85%
Worst quarter during calendar years shown—4Q 2008: (19.94)%

Average annual total returns (figures reflect 2% PACE Select Advisors Program Fee) (for the periods ended December 31, 2013)

Average Annual Returns Class P Prospectus PACE® International Equity Investments	Average Annual Returns, 1 Year	Average Annual Returns, 5 Years	Average Annual Returns, 10 Years	Average Annual Returns, Inception Date
Class P	17.57%	8.48%	3.94%	Aug. 24, 1995
Class P After Taxes on Distributions	17.07%	8.08%	3.28%
Class P After Taxes on Distributions and Sale of Fund Shares	10.47%	6.82%	3.49%
Class P MSCI EAFE Index (net) (Index reflects no deduction for fees, expenses or taxes.)	22.78%	12.44%	6.91%

[1] These "Dividend expense, borrowing costs and related interest expense attributable to securities sold short" are based on estimates and may vary based on actual investments.

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A, C, Y Prospectus | PACE® Small/Medium Co Growth Equity Investments

PACE® Small/Medium Co Growth Equity Investments

Investment objective

Capital appreciation.

Fees and expenses of the fund

These tables describe the fees and expenses that you may pay if you buy and hold shares of the fund. You may qualify for sales charge discounts on purchases of Class A shares if you or your family invest, or agree to invest in the future, at least $50,000 in the UBS family of funds. More information about these and other discounts and waivers, as well as eligibility requirements for each share class, is available from your financial advisor and in "Managing your fund account" on page 109 of the prospectus and in "Reduced sales charges, additional purchase, exchange and redemption information and other services" on page 208 of the fund's Statement of Additional Information.

Shareholder fees (fees paid directly from your investment)

Shareholder Fees A, C, Y Prospectus PACE® Small/Medium Co Growth Equity Investments	CLASS A	CLASS C	CLASS Y
Maximum front-end sales charge (load) imposed on purchases (as a % of the offering price)	5.50%	none	none
Maximum deferred sales charge (load) (as a % of the lesser of the offering price or the redemption price)	none	1.00%	none
Exchange fee	none	none	none
Redemption fee (as a % of the amount redeemed within 90 days of purchase, if applicable)	1.00%	1.00%	1.00%

Annual fund operating expenses (expenses that you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses A, C, Y Prospectus PACE® Small/Medium Co Growth Equity Investments		CLASS A	CLASS C	CLASS Y
Management fees		0.70%	0.70%	0.70%
Distribution and/or service (12b-1) fees		0.25%	1.00%	none
Other expenses (includes administration fee of 0.10%)		0.31%	0.32%	0.55%
Total annual fund operating expenses		1.26%	2.02%	1.25%
Management fee waiver/expense reimbursements	[1]			0.12%
Total annual fund operating expenses after fee waiver and/or expense reimbursements	[1]	1.26%	2.02%	1.13%

Example

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 unless otherwise stated. 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:

Expense Example A, C, Y Prospectus PACE® Small/Medium Co Growth Equity Investments (USD $)		1 year	3 years	5 years	10 years
CLASS A	[1]	671	928	1,204	1,989
CLASS C	[1]	305	634	1,088	2,348
CLASS Y	[1]	115	385	675	1,501

Expense Example No Redemption (USD $)		1 year	3 years	5 years	10 years
A, C, Y Prospectus PACE® Small/Medium Co Growth Equity Investments CLASS C	[1]	205	634	1,088	2,348

Portfolio turnover

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 60% of the average value of its portfolio.

Principal strategies

Principal investments

The fund invests primarily in stocks of "emerging growth" companies that are believed to have potential for high future earnings growth relative to the overall market. 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 issued by small/medium capitalization companies. As of the date of this prospectus, small/medium capitalization companies means companies with a total market capitalization of less than $6.0 billion at the time of purchase. Effective April 28, 2014, small/medium capitalization companies means companies with a total market capitalization within the market capitalization range of the companies in the Russell 2500^® Growth Index at the time of purchase. Dividend income is an incidental consideration in the investment advisors' selection of stocks for the fund.

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 healthcare or technology. The fund may invest, to a limited extent, in stocks of companies with larger total market capitalizations and other securities, including securities convertible into stocks. The fund may invest up to 10% of its total assets in non-US securities, which may trade either within or outside the US.

The fund's investment strategies may result in high portfolio turnover.

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. Copper Rock Capital Partners, LLC ("Copper Rock"), Palisade Capital Management, L.L.C. ("Palisade"), Riverbridge Partners, LLC ("Riverbridge"), Lee Munder Capital Group, LLC ("LMCG") and Timpani Capital Management LLC ("Timpani") 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.

Copper Rock employs a fundamental, bottom-up investment approach that focuses on identifying emerging companies that exhibit the potential for strong and sustainable revenue growth over each of the following two years. Copper Rock believes that incremental margin expansion and proven management are key factors that propel a company's growth. Copper Rock will typically hold 70 to 90 equity positions that are diversified across sectors and industries. Copper Rock utilizes a "pure" growth investment style that emphasizes growth and momentum characteristics, and attempts to manage risk by diversifying and understanding its holdings and employing a stringent sell discipline.

Palisade seeks fundamentally strong and dynamic small and mid cap companies that are trading at a discount to their growth rates. Palisade's goal is to ascertain a dynamic of change before it manifests in consensus estimates. Palisade believes that the small and mid cap market is inherently less efficient than the large cap market, and attempts to gain an informational advantage by committing to the labor intensive process of conducting bottom-up fundamental research on small and mid cap companies, as well as their customers, competitors and supply chains. Palisade places heavy emphasis on the effectiveness of a small/mid cap company's management team and seeks direct access to a variety of each company's key decision-makers.

Riverbridge believes that earnings power determines the value of a franchise. Riverbridge focuses on companies that are viewed as building their earnings power and building the intrinsic value of the company over long periods of time. Riverbridge looks to invest in high-quality growth companies that demonstrate the ability to sustain strong secular earnings growth, regardless of overall economic conditions.

LMCG seeks to achieve competitive returns in small/medium capitalization companies by identifying unrecognized growth potential, wherever it exists across all industry sectors. LMCG seeks to identify firms with high quality business models, distinct competitive advantages, proven management teams, and significant growth potential. Revenue growth, margin expansion, and the ability to positively surprise and revise earnings estimates are key characteristics in LMCG's holdings. LMCG seeks to identify firms that have duration and sustainability of these characteristics based on their competitive positions in their respective industries.

Timpani seeks to invest in small cap companies where growth is robust, sustainable and underestimated by the market. Timpani uses fundamental research, focusing on companies that it believes have superior management and whose business models have a high potential for earnings upside. Timpani forms an investment decision based on this research and an assessment of the market's perception of these companies. Timpani may invest in any sector, may emphasize one or more particular sectors and may sell a company's stock when it believes a company's prospects for growth have diminished. Timpani may also sell or reduce a portfolio position when it sees market sentiment turn negative on a stock held in the portfolio.

Principal risks

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.

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.

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.

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.

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.

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.

Management risk: The risk that the investment strategies, techniques and risk analyses employed by an investment advisor may not produce the desired results.

Performance

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 sales charges of the fund's Class C shares; 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. Riverbridge assumed day-to-day management of a portion of the fund's assets on October 1, 2005. Copper Rock assumed responsibility for managing a separate portion of the fund's assets on March 1, 2007. Palisade assumed day-to-day management of a separate portion of the fund's assets on February 2, 2009. LMCG and Timpani assumed day-to-day management of a separate portion of the fund's assets on November 25, 2013. 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. After-tax returns for other classes will vary from the Class C shares' after-tax returns shown.

PACE Small/Medium Co Growth Equity Investments Annual Total Returns of Class C Shares

Best quarter during calendar years shown—2Q 2009: 20.34%
Worst quarter during calendar years shown—4Q 2008: (26.48)%

Average annual total returns (figures reflect sales charges) (for the periods ended December 31, 2013)

Average Annual Returns A, C, Y Prospectus PACE® Small/Medium Co Growth Equity Investments	Average Annual Returns, 1 Year	Average Annual Returns, 5 Years	Average Annual Returns, 10 Years	Average Annual Returns, Inception Date
CLASS A	31.17%	21.85%	8.03%	Nov. 27, 2000
CLASS C	36.73%	22.29%	7.80%	Nov. 27, 2000
CLASS Y	38.90%	23.44%	8.95%	Feb. 12, 2001
After Taxes on Distributions CLASS C	31.67%	21.29%	6.67%
After Taxes on Distributions and Sale of Fund Shares CLASS C	23.84%	18.21%	6.17%
Russell 2500 Growth Index (Index reflects no deduction for fees, expenses or taxes.)	40.65%	24.03%	10.11%

[1] 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 of each class through March 31, 2015 (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 1.38% for Class A, 2.13% for Class C and 1.13% for Class Y. 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 these expense caps. 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.

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

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